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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  CDK_TABLE_TEMPLATE,\n  CdkTable,\n  CDK_TABLE,\n  _CoalescedStyleScheduler, _COALESCED_STYLE_SCHEDULER\n} from '@angular/cdk/table';\nimport {ChangeDetectionStrategy, Component, ViewEncapsulation} from '@angular/core';\nimport {_DisposeViewRepeaterStrategy, _VIEW_REPEATER_STRATEGY} from '@angular/cdk/collections';\n\n/**\n * Wrapper for the CdkTable with Material design styles.\n */\n@Component({\n  selector: 'mat-table, table[mat-table]',\n  exportAs: 'matTable',\n  template: CDK_TABLE_TEMPLATE,\n  styleUrls: ['table.css'],\n  host: {\n    'class': 'mat-table',\n  },\n  providers: [\n    // TODO(michaeljamesparsons) Abstract the view repeater strategy to a directive API so this code\n    //  is only included in the build if used.\n    {provide: _VIEW_REPEATER_STRATEGY, useClass: _DisposeViewRepeaterStrategy},\n    {provide: CdkTable, useExisting: MatTable},\n    {provide: CDK_TABLE, useExisting: MatTable},\n    {provide: _COALESCED_STYLE_SCHEDULER, useClass: _CoalescedStyleScheduler},\n  ],\n  encapsulation: ViewEncapsulation.None,\n  // See note on CdkTable for explanation on why this uses the default change detection strategy.\n  // tslint:disable-next-line:validate-decorators\n  changeDetection: ChangeDetectionStrategy.Default,\n})\nexport class MatTable<T> extends CdkTable<T> {\n  /** Overrides the sticky CSS class set by the `CdkTable`. */\n  protected stickyCssClass = 'mat-table-sticky';\n\n  /** Overrides the need to add position: sticky on every sticky cell element in `CdkTable`. */\n  protected needsPositionStickyOnElement = false;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {BooleanInput} from '@angular/cdk/coercion';\nimport {Directive, Input} from '@angular/core';\nimport {\n  CdkCell,\n  CdkCellDef,\n  CdkColumnDef, CdkFooterCell, CdkFooterCellDef,\n  CdkHeaderCell,\n  CdkHeaderCellDef,\n} from '@angular/cdk/table';\n\n/**\n * Cell definition for the mat-table.\n * Captures the template of a column's data row cell as well as cell-specific properties.\n */\n@Directive({\n  selector: '[matCellDef]',\n  providers: [{provide: CdkCellDef, useExisting: MatCellDef}]\n})\nexport class MatCellDef extends CdkCellDef {}\n\n/**\n * Header cell definition for the mat-table.\n * Captures the template of a column's header cell and as well as cell-specific properties.\n */\n@Directive({\n  selector: '[matHeaderCellDef]',\n  providers: [{provide: CdkHeaderCellDef, useExisting: MatHeaderCellDef}]\n})\nexport class MatHeaderCellDef extends CdkHeaderCellDef {}\n\n/**\n * Footer cell definition for the mat-table.\n * Captures the template of a column's footer cell and as well as cell-specific properties.\n */\n@Directive({\n  selector: '[matFooterCellDef]',\n  providers: [{provide: CdkFooterCellDef, useExisting: MatFooterCellDef}]\n})\nexport class MatFooterCellDef extends CdkFooterCellDef {}\n\n/**\n * Column definition for the mat-table.\n * Defines a set of cells available for a table column.\n */\n@Directive({\n  selector: '[matColumnDef]',\n  inputs: ['sticky'],\n  providers: [\n    {provide: CdkColumnDef, useExisting: MatColumnDef},\n    {provide: 'MAT_SORT_HEADER_COLUMN_DEF', useExisting: MatColumnDef}\n  ],\n})\nexport class MatColumnDef extends CdkColumnDef {\n  /** Unique name for this column. */\n  @Input('matColumnDef')\n  get name(): string { return this._name; }\n  set name(name: string) { this._setNameInput(name); }\n\n  /**\n   * Add \"mat-column-\" prefix in addition to \"cdk-column-\" prefix.\n   * In the future, this will only add \"mat-column-\" and columnCssClassName\n   * will change from type string[] to string.\n   * @docs-private\n   */\n  protected _updateColumnCssClassName() {\n    super._updateColumnCssClassName();\n    this._columnCssClassName!.push(`mat-column-${this.cssClassFriendlyName}`);\n  }\n\n  static ngAcceptInputType_sticky: BooleanInput;\n}\n\n/** Header cell template container that adds the right classes and role. */\n@Directive({\n  selector: 'mat-header-cell, th[mat-header-cell]',\n  host: {\n    'class': 'mat-header-cell',\n    'role': 'columnheader',\n  },\n})\nexport class MatHeaderCell extends CdkHeaderCell {}\n\n/** Footer cell template container that adds the right classes and role. */\n@Directive({\n  selector: 'mat-footer-cell, td[mat-footer-cell]',\n  host: {\n    'class': 'mat-footer-cell',\n    'role': 'gridcell',\n  },\n})\nexport class MatFooterCell extends CdkFooterCell {}\n\n/** Cell template container that adds the right classes and role. */\n@Directive({\n  selector: 'mat-cell, td[mat-cell]',\n  host: {\n    'class': 'mat-cell',\n    'role': 'gridcell',\n  },\n})\nexport class MatCell extends CdkCell {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {BooleanInput} from '@angular/cdk/coercion';\nimport {\n  CDK_ROW_TEMPLATE,\n  CdkFooterRow,\n  CdkFooterRowDef,\n  CdkHeaderRow,\n  CdkHeaderRowDef,\n  CdkRow,\n  CdkRowDef,\n  CdkNoDataRow\n} from '@angular/cdk/table';\nimport {ChangeDetectionStrategy, Component, Directive, ViewEncapsulation} from '@angular/core';\n\n/**\n * Header row definition for the mat-table.\n * Captures the header row's template and other header properties such as the columns to display.\n */\n@Directive({\n  selector: '[matHeaderRowDef]',\n  providers: [{provide: CdkHeaderRowDef, useExisting: MatHeaderRowDef}],\n  inputs: ['columns: matHeaderRowDef', 'sticky: matHeaderRowDefSticky'],\n})\nexport class MatHeaderRowDef extends CdkHeaderRowDef {\n  static ngAcceptInputType_sticky: BooleanInput;\n}\n\n/**\n * Footer row definition for the mat-table.\n * Captures the footer row's template and other footer properties such as the columns to display.\n */\n@Directive({\n  selector: '[matFooterRowDef]',\n  providers: [{provide: CdkFooterRowDef, useExisting: MatFooterRowDef}],\n  inputs: ['columns: matFooterRowDef', 'sticky: matFooterRowDefSticky'],\n})\nexport class MatFooterRowDef extends CdkFooterRowDef {\n  static ngAcceptInputType_sticky: BooleanInput;\n}\n\n/**\n * Data row definition for the mat-table.\n * Captures the data row's template and other properties such as the columns to display and\n * a when predicate that describes when this row should be used.\n */\n@Directive({\n  selector: '[matRowDef]',\n  providers: [{provide: CdkRowDef, useExisting: MatRowDef}],\n  inputs: ['columns: matRowDefColumns', 'when: matRowDefWhen'],\n})\nexport class MatRowDef<T> extends CdkRowDef<T> {\n}\n\n/** Header template container that contains the cell outlet. Adds the right class and role. */\n@Component({\n  selector: 'mat-header-row, tr[mat-header-row]',\n  template: CDK_ROW_TEMPLATE,\n  host: {\n    'class': 'mat-header-row',\n    'role': 'row',\n  },\n  // See note on CdkTable for explanation on why this uses the default change detection strategy.\n  // tslint:disable-next-line:validate-decorators\n  changeDetection: ChangeDetectionStrategy.Default,\n  encapsulation: ViewEncapsulation.None,\n  exportAs: 'matHeaderRow',\n  providers: [{provide: CdkHeaderRow, useExisting: MatHeaderRow}],\n})\nexport class MatHeaderRow extends CdkHeaderRow {\n}\n\n/** Footer template container that contains the cell outlet. Adds the right class and role. */\n@Component({\n  selector: 'mat-footer-row, tr[mat-footer-row]',\n  template: CDK_ROW_TEMPLATE,\n  host: {\n    'class': 'mat-footer-row',\n    'role': 'row',\n  },\n  // See note on CdkTable for explanation on why this uses the default change detection strategy.\n  // tslint:disable-next-line:validate-decorators\n  changeDetection: ChangeDetectionStrategy.Default,\n  encapsulation: ViewEncapsulation.None,\n  exportAs: 'matFooterRow',\n  providers: [{provide: CdkFooterRow, useExisting: MatFooterRow}],\n})\nexport class MatFooterRow extends CdkFooterRow {\n}\n\n/** Data row template container that contains the cell outlet. Adds the right class and role. */\n@Component({\n  selector: 'mat-row, tr[mat-row]',\n  template: CDK_ROW_TEMPLATE,\n  host: {\n    'class': 'mat-row',\n    'role': 'row',\n  },\n  // See note on CdkTable for explanation on why this uses the default change detection strategy.\n  // tslint:disable-next-line:validate-decorators\n  changeDetection: ChangeDetectionStrategy.Default,\n  encapsulation: ViewEncapsulation.None,\n  exportAs: 'matRow',\n  providers: [{provide: CdkRow, useExisting: MatRow}],\n})\nexport class MatRow extends CdkRow {\n}\n\n/** Row that can be used to display a message when no data is shown in the table. */\n@Directive({\n  selector: 'ng-template[matNoDataRow]',\n  providers: [{provide: CdkNoDataRow, useExisting: MatNoDataRow}],\n})\nexport class MatNoDataRow extends CdkNoDataRow {\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {CdkTextColumn} from '@angular/cdk/table';\nimport {ChangeDetectionStrategy, Component, ViewEncapsulation} from '@angular/core';\n\n/**\n * Column that simply shows text content for the header and row cells. Assumes that the table\n * is using the native table implementation (`<table>`).\n *\n * By default, the name of this column will be the header text and data property accessor.\n * The header text can be overridden with the `headerText` input. Cell values can be overridden with\n * the `dataAccessor` input. Change the text justification to the start or end using the `justify`\n * input.\n */\n@Component({\n  selector: 'mat-text-column',\n  template: `\n    <ng-container matColumnDef>\n      <th mat-header-cell *matHeaderCellDef [style.text-align]=\"justify\">\n        {{headerText}}\n      </th>\n      <td mat-cell *matCellDef=\"let data\" [style.text-align]=\"justify\">\n        {{dataAccessor(data, name)}}\n      </td>\n    </ng-container>\n  `,\n  encapsulation: ViewEncapsulation.None,\n  // Change detection is intentionally not set to OnPush. This component's template will be provided\n  // to the table to be inserted into its view. This is problematic when change detection runs since\n  // the bindings in this template will be evaluated _after_ the table's view is evaluated, which\n  // mean's the template in the table's view will not have the updated value (and in fact will cause\n  // an ExpressionChangedAfterItHasBeenCheckedError).\n  // tslint:disable-next-line:validate-decorators\n  changeDetection: ChangeDetectionStrategy.Default,\n})\nexport class MatTextColumn<T> extends CdkTextColumn<T> {\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgModule} from '@angular/core';\nimport {MatTable} from './table';\nimport {CdkTableModule} from '@angular/cdk/table';\nimport {\n  MatCell,\n  MatCellDef,\n  MatColumnDef,\n  MatFooterCell,\n  MatFooterCellDef,\n  MatHeaderCell,\n  MatHeaderCellDef\n} from './cell';\nimport {\n  MatFooterRow,\n  MatFooterRowDef,\n  MatHeaderRow,\n  MatHeaderRowDef,\n  MatRow,\n  MatRowDef,\n  MatNoDataRow\n} from './row';\nimport {MatTextColumn} from './text-column';\nimport {MatCommonModule} from '@angular/material/core';\n\nconst EXPORTED_DECLARATIONS = [\n  // Table\n  MatTable,\n\n  // Template defs\n  MatHeaderCellDef,\n  MatHeaderRowDef,\n  MatColumnDef,\n  MatCellDef,\n  MatRowDef,\n  MatFooterCellDef,\n  MatFooterRowDef,\n\n  // Cell directives\n  MatHeaderCell,\n  MatCell,\n  MatFooterCell,\n\n  // Row directives\n  MatHeaderRow,\n  MatRow,\n  MatFooterRow,\n  MatNoDataRow,\n\n  MatTextColumn,\n];\n\n@NgModule({\n  imports: [\n    CdkTableModule,\n    MatCommonModule,\n  ],\n  exports: [MatCommonModule, EXPORTED_DECLARATIONS],\n  declarations: EXPORTED_DECLARATIONS,\n})\nexport class MatTableModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {_isNumberValue} from '@angular/cdk/coercion';\nimport {DataSource} from '@angular/cdk/table';\nimport {\n  BehaviorSubject,\n  combineLatest,\n  merge,\n  Observable,\n  of as observableOf,\n  Subscription,\n  Subject,\n} from 'rxjs';\nimport {MatPaginator, PageEvent} from '@angular/material/paginator';\nimport {MatSort, Sort} from '@angular/material/sort';\nimport {map} from 'rxjs/operators';\n\n/**\n * Corresponds to `Number.MAX_SAFE_INTEGER`. Moved out into a variable here due to\n * flaky browser support and the value not being defined in Closure's typings.\n */\nconst MAX_SAFE_INTEGER = 9007199254740991;\n\n/**\n * Data source that accepts a client-side data array and includes native support of filtering,\n * sorting (using MatSort), and pagination (using MatPaginator).\n *\n * Allows for sort customization by overriding sortingDataAccessor, which defines how data\n * properties are accessed. Also allows for filter customization by overriding filterTermAccessor,\n * which defines how row data is converted to a string for filter matching.\n *\n * **Note:** This class is meant to be a simple data source to help you get started. As such\n * it isn't equipped to handle some more advanced cases like robust i18n support or server-side\n * interactions. If your app needs to support more advanced use cases, consider implementing your\n * own `DataSource`.\n */\nexport class MatTableDataSource<T> extends DataSource<T> {\n  /** Stream that emits when a new data array is set on the data source. */\n  private readonly _data: BehaviorSubject<T[]>;\n\n  /** Stream emitting render data to the table (depends on ordered data changes). */\n  private readonly _renderData = new BehaviorSubject<T[]>([]);\n\n  /** Stream that emits when a new filter string is set on the data source. */\n  private readonly _filter = new BehaviorSubject<string>('');\n\n  /** Used to react to internal changes of the paginator that are made by the data source itself. */\n  private readonly _internalPageChanges = new Subject<void>();\n\n  /**\n   * Subscription to the changes that should trigger an update to the table's rendered rows, such\n   * as filtering, sorting, pagination, or base data changes.\n   */\n  _renderChangesSubscription = Subscription.EMPTY;\n\n  /**\n   * The filtered set of data that has been matched by the filter string, or all the data if there\n   * is no filter. Useful for knowing the set of data the table represents.\n   * For example, a 'selectAll()' function would likely want to select the set of filtered data\n   * shown to the user rather than all the data.\n   */\n  filteredData: T[];\n\n  /** Array of data that should be rendered by the table, where each object represents one row. */\n  get data() { return this._data.value; }\n  set data(data: T[]) { this._data.next(data); }\n\n  /**\n   * Filter term that should be used to filter out objects from the data array. To override how\n   * data objects match to this filter string, provide a custom function for filterPredicate.\n   */\n  get filter(): string { return this._filter.value; }\n  set filter(filter: string) { this._filter.next(filter); }\n\n  /**\n   * Instance of the MatSort directive used by the table to control its sorting. Sort changes\n   * emitted by the MatSort will trigger an update to the table's rendered data.\n   */\n  get sort(): MatSort | null { return this._sort; }\n  set sort(sort: MatSort|null) {\n    this._sort = sort;\n    this._updateChangeSubscription();\n  }\n  private _sort: MatSort|null;\n\n  /**\n   * Instance of the MatPaginator component used by the table to control what page of the data is\n   * displayed. Page changes emitted by the MatPaginator will trigger an update to the\n   * table's rendered data.\n   *\n   * Note that the data source uses the paginator's properties to calculate which page of data\n   * should be displayed. If the paginator receives its properties as template inputs,\n   * e.g. `[pageLength]=100` or `[pageIndex]=1`, then be sure that the paginator's view has been\n   * initialized before assigning it to this data source.\n   */\n  get paginator(): MatPaginator | null { return this._paginator; }\n  set paginator(paginator: MatPaginator|null) {\n    this._paginator = paginator;\n    this._updateChangeSubscription();\n  }\n  private _paginator: MatPaginator|null;\n\n  /**\n   * Data accessor function that is used for accessing data properties for sorting through\n   * the default sortData function.\n   * This default function assumes that the sort header IDs (which defaults to the column name)\n   * matches the data's properties (e.g. column Xyz represents data['Xyz']).\n   * May be set to a custom function for different behavior.\n   * @param data Data object that is being accessed.\n   * @param sortHeaderId The name of the column that represents the data.\n   */\n  sortingDataAccessor: ((data: T, sortHeaderId: string) => string|number) =\n      (data: T, sortHeaderId: string): string|number => {\n    const value = (data as {[key: string]: any})[sortHeaderId];\n\n    if (_isNumberValue(value)) {\n      const numberValue = Number(value);\n\n      // Numbers beyond `MAX_SAFE_INTEGER` can't be compared reliably so we\n      // leave them as strings. For more info: https://goo.gl/y5vbSg\n      return numberValue < MAX_SAFE_INTEGER ? numberValue : value;\n    }\n\n    return value;\n  }\n\n  /**\n   * Gets a sorted copy of the data array based on the state of the MatSort. Called\n   * after changes are made to the filtered data or when sort changes are emitted from MatSort.\n   * By default, the function retrieves the active sort and its direction and compares data\n   * by retrieving data using the sortingDataAccessor. May be overridden for a custom implementation\n   * of data ordering.\n   * @param data The array of data that should be sorted.\n   * @param sort The connected MatSort that holds the current sort state.\n   */\n  sortData: ((data: T[], sort: MatSort) => T[]) = (data: T[], sort: MatSort): T[] => {\n    const active = sort.active;\n    const direction = sort.direction;\n    if (!active || direction == '') { return data; }\n\n    return data.sort((a, b) => {\n      let valueA = this.sortingDataAccessor(a, active);\n      let valueB = this.sortingDataAccessor(b, active);\n\n      // If there are data in the column that can be converted to a number,\n      // it must be ensured that the rest of the data\n      // is of the same type so as not to order incorrectly.\n      const valueAType = typeof valueA;\n      const valueBType = typeof valueB;\n\n      if (valueAType !== valueBType) {\n        if (valueAType === 'number') { valueA += ''; }\n        if (valueBType === 'number') { valueB += ''; }\n      }\n\n      // If both valueA and valueB exist (truthy), then compare the two. Otherwise, check if\n      // one value exists while the other doesn't. In this case, existing value should come last.\n      // This avoids inconsistent results when comparing values to undefined/null.\n      // If neither value exists, return 0 (equal).\n      let comparatorResult = 0;\n      if (valueA != null && valueB != null) {\n        // Check if one value is greater than the other; if equal, comparatorResult should remain 0.\n        if (valueA > valueB) {\n          comparatorResult = 1;\n        } else if (valueA < valueB) {\n          comparatorResult = -1;\n        }\n      } else if (valueA != null) {\n        comparatorResult = 1;\n      } else if (valueB != null) {\n        comparatorResult = -1;\n      }\n\n      return comparatorResult * (direction == 'asc' ? 1 : -1);\n    });\n  }\n\n  /**\n   * Checks if a data object matches the data source's filter string. By default, each data object\n   * is converted to a string of its properties and returns true if the filter has\n   * at least one occurrence in that string. By default, the filter string has its whitespace\n   * trimmed and the match is case-insensitive. May be overridden for a custom implementation of\n   * filter matching.\n   * @param data Data object used to check against the filter.\n   * @param filter Filter string that has been set on the data source.\n   * @returns Whether the filter matches against the data\n   */\n  filterPredicate: ((data: T, filter: string) => boolean) = (data: T, filter: string): boolean => {\n    // Transform the data into a lowercase string of all property values.\n    const dataStr = Object.keys(data).reduce((currentTerm: string, key: string) => {\n      // Use an obscure Unicode character to delimit the words in the concatenated string.\n      // This avoids matches where the values of two columns combined will match the user's query\n      // (e.g. `Flute` and `Stop` will match `Test`). The character is intended to be something\n      // that has a very low chance of being typed in by somebody in a text field. This one in\n      // particular is \"White up-pointing triangle with dot\" from\n      // https://en.wikipedia.org/wiki/List_of_Unicode_characters\n      return currentTerm + (data as {[key: string]: any})[key] + '◬';\n    }, '').toLowerCase();\n\n    // Transform the filter by converting it to lowercase and removing whitespace.\n    const transformedFilter = filter.trim().toLowerCase();\n\n    return dataStr.indexOf(transformedFilter) != -1;\n  }\n\n  constructor(initialData: T[] = []) {\n    super();\n    this._data = new BehaviorSubject<T[]>(initialData);\n    this._updateChangeSubscription();\n  }\n\n  /**\n   * Subscribe to changes that should trigger an update to the table's rendered rows. When the\n   * changes occur, process the current state of the filter, sort, and pagination along with\n   * the provided base data and send it to the table for rendering.\n   */\n  _updateChangeSubscription() {\n    // Sorting and/or pagination should be watched if MatSort and/or MatPaginator are provided.\n    // The events should emit whenever the component emits a change or initializes, or if no\n    // component is provided, a stream with just a null event should be provided.\n    // The `sortChange` and `pageChange` acts as a signal to the combineLatests below so that the\n    // pipeline can progress to the next step. Note that the value from these streams are not used,\n    // they purely act as a signal to progress in the pipeline.\n    const sortChange: Observable<Sort|null|void> = this._sort ?\n        merge(this._sort.sortChange, this._sort.initialized) as Observable<Sort|void> :\n        observableOf(null);\n    const pageChange: Observable<PageEvent|null|void> = this._paginator ?\n        merge(\n          this._paginator.page,\n          this._internalPageChanges,\n          this._paginator.initialized\n        ) as Observable<PageEvent|void> :\n        observableOf(null);\n    const dataStream = this._data;\n    // Watch for base data or filter changes to provide a filtered set of data.\n    const filteredData = combineLatest([dataStream, this._filter])\n      .pipe(map(([data]) => this._filterData(data)));\n    // Watch for filtered data or sort changes to provide an ordered set of data.\n    const orderedData = combineLatest([filteredData, sortChange])\n      .pipe(map(([data]) => this._orderData(data)));\n    // Watch for ordered data or page changes to provide a paged set of data.\n    const paginatedData = combineLatest([orderedData, pageChange])\n      .pipe(map(([data]) => this._pageData(data)));\n    // Watched for paged data changes and send the result to the table to render.\n    this._renderChangesSubscription.unsubscribe();\n    this._renderChangesSubscription = paginatedData.subscribe(data => this._renderData.next(data));\n  }\n\n  /**\n   * Returns a filtered data array where each filter object contains the filter string within\n   * the result of the filterTermAccessor function. If no filter is set, returns the data array\n   * as provided.\n   */\n  _filterData(data: T[]) {\n    // If there is a filter string, filter out data that does not contain it.\n    // Each data object is converted to a string using the function defined by filterTermAccessor.\n    // May be overridden for customization.\n    this.filteredData =\n        !this.filter ? data : data.filter(obj => this.filterPredicate(obj, this.filter));\n\n    if (this.paginator) { this._updatePaginator(this.filteredData.length); }\n\n    return this.filteredData;\n  }\n\n  /**\n   * Returns a sorted copy of the data if MatSort has a sort applied, otherwise just returns the\n   * data array as provided. Uses the default data accessor for data lookup, unless a\n   * sortDataAccessor function is defined.\n   */\n  _orderData(data: T[]): T[] {\n    // If there is no active sort or direction, return the data without trying to sort.\n    if (!this.sort) { return data; }\n\n    return this.sortData(data.slice(), this.sort);\n  }\n\n  /**\n   * Returns a paged slice of the provided data array according to the provided MatPaginator's page\n   * index and length. If there is no paginator provided, returns the data array as provided.\n   */\n  _pageData(data: T[]): T[] {\n    if (!this.paginator) { return data; }\n\n    const startIndex = this.paginator.pageIndex * this.paginator.pageSize;\n    return data.slice(startIndex, startIndex + this.paginator.pageSize);\n  }\n\n  /**\n   * Updates the paginator to reflect the length of the filtered data, and makes sure that the page\n   * index does not exceed the paginator's last page. Values are changed in a resolved promise to\n   * guard against making property changes within a round of change detection.\n   */\n  _updatePaginator(filteredDataLength: number) {\n    Promise.resolve().then(() => {\n      const paginator = this.paginator;\n\n      if (!paginator) { return; }\n\n      paginator.length = filteredDataLength;\n\n      // If the page index is set beyond the page, reduce it to the last page.\n      if (paginator.pageIndex > 0) {\n        const lastPageIndex = Math.ceil(paginator.length / paginator.pageSize) - 1 || 0;\n        const newPageIndex = Math.min(paginator.pageIndex, lastPageIndex);\n\n        if (newPageIndex !== paginator.pageIndex) {\n          paginator.pageIndex = newPageIndex;\n\n          // Since the paginator only emits after user-generated changes,\n          // we need our own stream so we know to should re-render the data.\n          this._internalPageChanges.next();\n        }\n      }\n    });\n  }\n\n  /**\n   * Used by the MatTable. Called when it connects to the data source.\n   * @docs-private\n   */\n  connect() { return this._renderData; }\n\n  /**\n   * Used by the MatTable. Called when it is destroyed. No-op.\n   * @docs-private\n   */\n  disconnect() { }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './table-module';\nexport * from './cell';\nexport * from './table';\nexport * from './row';\nexport * from './table-data-source';\nexport * from './text-column';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar let_1 = require(\"../../operator/let\");\nrxjs_1.Observable.prototype.let = let_1.letProto;\nrxjs_1.Observable.prototype.letBind = let_1.letProto;\n//# sourceMappingURL=let.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar observeOn_1 = require(\"../../operator/observeOn\");\nrxjs_1.Observable.prototype.observeOn = observeOn_1.observeOn;\n//# sourceMappingURL=observeOn.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar retry_1 = require(\"../../operator/retry\");\nrxjs_1.Observable.prototype.retry = retry_1.retry;\n//# sourceMappingURL=retry.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar distinctUntilChanged_1 = require(\"../../operator/distinctUntilChanged\");\nrxjs_1.Observable.prototype.distinctUntilChanged = distinctUntilChanged_1.distinctUntilChanged;\n//# sourceMappingURL=distinctUntilChanged.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * Throws an exception when attempting to attach a null portal to a host.\n * @docs-private\n */\nexport function throwNullPortalError() {\n  throw Error('Must provide a portal to attach');\n}\n\n/**\n * Throws an exception when attempting to attach a portal to a host that is already attached.\n * @docs-private\n */\nexport function throwPortalAlreadyAttachedError() {\n  throw Error('Host already has a portal attached');\n}\n\n/**\n * Throws an exception when attempting to attach a portal to an already-disposed host.\n * @docs-private\n */\nexport function throwPortalOutletAlreadyDisposedError() {\n  throw Error('This PortalOutlet has already been disposed');\n}\n\n/**\n * Throws an exception when attempting to attach an unknown portal type.\n * @docs-private\n */\nexport function throwUnknownPortalTypeError() {\n  throw Error('Attempting to attach an unknown Portal type. BasePortalOutlet accepts either ' +\n              'a ComponentPortal or a TemplatePortal.');\n}\n\n/**\n * Throws an exception when attempting to attach a portal to a null host.\n * @docs-private\n */\nexport function throwNullPortalOutletError() {\n  throw Error('Attempting to attach a portal to a null PortalOutlet');\n}\n\n/**\n * Throws an exception when attempting to detach a portal that is not attached.\n * @docs-private\n */\nexport function throwNoPortalAttachedError() {\n  throw Error('Attempting to detach a portal that is not attached to a host');\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n    TemplateRef,\n    ViewContainerRef,\n    ElementRef,\n    ComponentRef,\n    EmbeddedViewRef,\n    Injector,\n    ComponentFactoryResolver,\n} from '@angular/core';\nimport {\n    throwNullPortalOutletError,\n    throwPortalAlreadyAttachedError,\n    throwNoPortalAttachedError,\n    throwNullPortalError,\n    throwPortalOutletAlreadyDisposedError,\n    throwUnknownPortalTypeError\n} from './portal-errors';\n\n/** Interface that can be used to generically type a class. */\nexport interface ComponentType<T> {\n  new (...args: any[]): T;\n}\n\n/**\n * A `Portal` is something that you want to render somewhere else.\n * It can be attach to / detached from a `PortalOutlet`.\n */\nexport abstract class Portal<T> {\n  private _attachedHost: PortalOutlet | null;\n\n  /** Attach this portal to a host. */\n  attach(host: PortalOutlet): T {\n    if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      if (host == null) {\n        throwNullPortalOutletError();\n      }\n\n      if (host.hasAttached()) {\n        throwPortalAlreadyAttachedError();\n      }\n    }\n\n    this._attachedHost = host;\n    return <T> host.attach(this);\n  }\n\n  /** Detach this portal from its host */\n  detach(): void {\n    let host = this._attachedHost;\n\n    if (host != null) {\n      this._attachedHost = null;\n      host.detach();\n    } else if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      throwNoPortalAttachedError();\n    }\n  }\n\n  /** Whether this portal is attached to a host. */\n  get isAttached(): boolean {\n    return this._attachedHost != null;\n  }\n\n  /**\n   * Sets the PortalOutlet reference without performing `attach()`. This is used directly by\n   * the PortalOutlet when it is performing an `attach()` or `detach()`.\n   */\n  setAttachedHost(host: PortalOutlet | null) {\n    this._attachedHost = host;\n  }\n}\n\n\n/**\n * A `ComponentPortal` is a portal that instantiates some Component upon attachment.\n */\nexport class ComponentPortal<T> extends Portal<ComponentRef<T>> {\n  /** The type of the component that will be instantiated for attachment. */\n  component: ComponentType<T>;\n\n  /**\n   * [Optional] Where the attached component should live in Angular's *logical* component tree.\n   * This is different from where the component *renders*, which is determined by the PortalOutlet.\n   * The origin is necessary when the host is outside of the Angular application context.\n   */\n  viewContainerRef?: ViewContainerRef | null;\n\n  /** [Optional] Injector used for the instantiation of the component. */\n  injector?: Injector | null;\n\n  /**\n   * Alternate `ComponentFactoryResolver` to use when resolving the associated component.\n   * Defaults to using the resolver from the outlet that the portal is attached to.\n   */\n  componentFactoryResolver?: ComponentFactoryResolver | null;\n\n  constructor(\n      component: ComponentType<T>,\n      viewContainerRef?: ViewContainerRef | null,\n      injector?: Injector | null,\n      componentFactoryResolver?: ComponentFactoryResolver | null) {\n    super();\n    this.component = component;\n    this.viewContainerRef = viewContainerRef;\n    this.injector = injector;\n    this.componentFactoryResolver = componentFactoryResolver;\n  }\n}\n\n/**\n * A `TemplatePortal` is a portal that represents some embedded template (TemplateRef).\n */\nexport class TemplatePortal<C = any> extends Portal<EmbeddedViewRef<C>> {\n  /** The embedded template that will be used to instantiate an embedded View in the host. */\n  templateRef: TemplateRef<C>;\n\n  /** Reference to the ViewContainer into which the template will be stamped out. */\n  viewContainerRef: ViewContainerRef;\n\n  /** Contextual data to be passed in to the embedded view. */\n  context: C | undefined;\n\n  constructor(template: TemplateRef<C>, viewContainerRef: ViewContainerRef, context?: C) {\n    super();\n    this.templateRef = template;\n    this.viewContainerRef = viewContainerRef;\n    this.context = context;\n  }\n\n  get origin(): ElementRef {\n    return this.templateRef.elementRef;\n  }\n\n  /**\n   * Attach the portal to the provided `PortalOutlet`.\n   * When a context is provided it will override the `context` property of the `TemplatePortal`\n   * instance.\n   */\n  attach(host: PortalOutlet, context: C | undefined = this.context): EmbeddedViewRef<C> {\n    this.context = context;\n    return super.attach(host);\n  }\n\n  detach(): void {\n    this.context = undefined;\n    return super.detach();\n  }\n}\n\n/**\n * A `DomPortal` is a portal whose DOM element will be taken from its current position\n * in the DOM and moved into a portal outlet, when it is attached. On detach, the content\n * will be restored to its original position.\n */\nexport class DomPortal<T = HTMLElement> extends Portal<T> {\n  /** DOM node hosting the portal's content. */\n  readonly element: T;\n\n  constructor(element: T | ElementRef<T>) {\n    super();\n    this.element = element instanceof ElementRef ? element.nativeElement : element;\n  }\n}\n\n\n/** A `PortalOutlet` is an space that can contain a single `Portal`. */\nexport interface PortalOutlet {\n  /** Attaches a portal to this outlet. */\n  attach(portal: Portal<any>): any;\n\n  /** Detaches the currently attached portal from this outlet. */\n  detach(): any;\n\n  /** Performs cleanup before the outlet is destroyed. */\n  dispose(): void;\n\n  /** Whether there is currently a portal attached to this outlet. */\n  hasAttached(): boolean;\n}\n\n/**\n * @deprecated Use `PortalOutlet` instead.\n * @breaking-change 9.0.0\n */\nexport type PortalHost = PortalOutlet;\n\n/**\n * Partial implementation of PortalOutlet that handles attaching\n * ComponentPortal and TemplatePortal.\n */\nexport abstract class BasePortalOutlet implements PortalOutlet {\n  /** The portal currently attached to the host. */\n  protected _attachedPortal: Portal<any> | null;\n\n  /** A function that will permanently dispose this host. */\n  private _disposeFn: (() => void) | null;\n\n  /** Whether this host has already been permanently disposed. */\n  private _isDisposed: boolean = false;\n\n  /** Whether this host has an attached portal. */\n  hasAttached(): boolean {\n    return !!this._attachedPortal;\n  }\n\n  attach<T>(portal: ComponentPortal<T>): ComponentRef<T>;\n  attach<T>(portal: TemplatePortal<T>): EmbeddedViewRef<T>;\n  attach(portal: any): any;\n\n  /** Attaches a portal. */\n  attach(portal: Portal<any>): any {\n    if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      if (!portal) {\n        throwNullPortalError();\n      }\n\n      if (this.hasAttached()) {\n        throwPortalAlreadyAttachedError();\n      }\n\n      if (this._isDisposed) {\n        throwPortalOutletAlreadyDisposedError();\n      }\n    }\n\n    if (portal instanceof ComponentPortal) {\n      this._attachedPortal = portal;\n      return this.attachComponentPortal(portal);\n    } else if (portal instanceof TemplatePortal) {\n      this._attachedPortal = portal;\n      return this.attachTemplatePortal(portal);\n      // @breaking-change 10.0.0 remove null check for `this.attachDomPortal`.\n    } else if (this.attachDomPortal && portal instanceof DomPortal) {\n      this._attachedPortal = portal;\n      return this.attachDomPortal(portal);\n    }\n\n    if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      throwUnknownPortalTypeError();\n    }\n  }\n\n  abstract attachComponentPortal<T>(portal: ComponentPortal<T>): ComponentRef<T>;\n\n  abstract attachTemplatePortal<C>(portal: TemplatePortal<C>): EmbeddedViewRef<C>;\n\n  // @breaking-change 10.0.0 `attachDomPortal` to become a required abstract method.\n  readonly attachDomPortal: null | ((portal: DomPortal) => any) = null;\n\n  /** Detaches a previously attached portal. */\n  detach(): void {\n    if (this._attachedPortal) {\n      this._attachedPortal.setAttachedHost(null);\n      this._attachedPortal = null;\n    }\n\n    this._invokeDisposeFn();\n  }\n\n  /** Permanently dispose of this portal host. */\n  dispose(): void {\n    if (this.hasAttached()) {\n      this.detach();\n    }\n\n    this._invokeDisposeFn();\n    this._isDisposed = true;\n  }\n\n  /** @docs-private */\n  setDisposeFn(fn: () => void) {\n    this._disposeFn = fn;\n  }\n\n  private _invokeDisposeFn() {\n    if (this._disposeFn) {\n      this._disposeFn();\n      this._disposeFn = null;\n    }\n  }\n}\n\n/**\n * @deprecated Use `BasePortalOutlet` instead.\n * @breaking-change 9.0.0\n */\nexport abstract class BasePortalHost extends BasePortalOutlet {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  ComponentFactoryResolver,\n  ComponentRef,\n  EmbeddedViewRef,\n  ApplicationRef,\n  Injector,\n} from '@angular/core';\nimport {BasePortalOutlet, ComponentPortal, TemplatePortal, DomPortal} from './portal';\n\n\n/**\n * A PortalOutlet for attaching portals to an arbitrary DOM element outside of the Angular\n * application context.\n */\nexport class DomPortalOutlet extends BasePortalOutlet {\n  private _document: Document;\n\n  constructor(\n      /** Element into which the content is projected. */\n      public outletElement: Element,\n      private _componentFactoryResolver: ComponentFactoryResolver,\n      private _appRef: ApplicationRef,\n      private _defaultInjector: Injector,\n\n      /**\n       * @deprecated `_document` Parameter to be made required.\n       * @breaking-change 10.0.0\n       */\n      _document?: any) {\n    super();\n    this._document = _document;\n  }\n\n  /**\n   * Attach the given ComponentPortal to DOM element using the ComponentFactoryResolver.\n   * @param portal Portal to be attached\n   * @returns Reference to the created component.\n   */\n  attachComponentPortal<T>(portal: ComponentPortal<T>): ComponentRef<T> {\n    const resolver = portal.componentFactoryResolver || this._componentFactoryResolver;\n    const componentFactory = resolver.resolveComponentFactory(portal.component);\n    let componentRef: ComponentRef<T>;\n\n    // If the portal specifies a ViewContainerRef, we will use that as the attachment point\n    // for the component (in terms of Angular's component tree, not rendering).\n    // When the ViewContainerRef is missing, we use the factory to create the component directly\n    // and then manually attach the view to the application.\n    if (portal.viewContainerRef) {\n      componentRef = portal.viewContainerRef.createComponent(\n          componentFactory,\n          portal.viewContainerRef.length,\n          portal.injector || portal.viewContainerRef.injector);\n\n      this.setDisposeFn(() => componentRef.destroy());\n    } else {\n      componentRef = componentFactory.create(portal.injector || this._defaultInjector);\n      this._appRef.attachView(componentRef.hostView);\n      this.setDisposeFn(() => {\n        this._appRef.detachView(componentRef.hostView);\n        componentRef.destroy();\n      });\n    }\n    // At this point the component has been instantiated, so we move it to the location in the DOM\n    // where we want it to be rendered.\n    this.outletElement.appendChild(this._getComponentRootNode(componentRef));\n\n    return componentRef;\n  }\n\n  /**\n   * Attaches a template portal to the DOM as an embedded view.\n   * @param portal Portal to be attached.\n   * @returns Reference to the created embedded view.\n   */\n  attachTemplatePortal<C>(portal: TemplatePortal<C>): EmbeddedViewRef<C> {\n    let viewContainer = portal.viewContainerRef;\n    let viewRef = viewContainer.createEmbeddedView(portal.templateRef, portal.context);\n\n    // The method `createEmbeddedView` will add the view as a child of the viewContainer.\n    // But for the DomPortalOutlet the view can be added everywhere in the DOM\n    // (e.g Overlay Container) To move the view to the specified host element. We just\n    // re-append the existing root nodes.\n    viewRef.rootNodes.forEach(rootNode => this.outletElement.appendChild(rootNode));\n\n    // Note that we want to detect changes after the nodes have been moved so that\n    // any directives inside the portal that are looking at the DOM inside a lifecycle\n    // hook won't be invoked too early.\n    viewRef.detectChanges();\n\n    this.setDisposeFn((() => {\n      let index = viewContainer.indexOf(viewRef);\n      if (index !== -1) {\n        viewContainer.remove(index);\n      }\n    }));\n\n    // TODO(jelbourn): Return locals from view.\n    return viewRef;\n  }\n\n  /**\n   * Attaches a DOM portal by transferring its content into the outlet.\n   * @param portal Portal to be attached.\n   * @deprecated To be turned into a method.\n   * @breaking-change 10.0.0\n   */\n  attachDomPortal = (portal: DomPortal) => {\n    // @breaking-change 10.0.0 Remove check and error once the\n    // `_document` constructor parameter is required.\n    if (!this._document && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw Error('Cannot attach DOM portal without _document constructor parameter');\n    }\n\n    const element = portal.element;\n    if (!element.parentNode && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw Error('DOM portal content must be attached to a parent node.');\n    }\n\n    // Anchor used to save the element's previous position so\n    // that we can restore it when the portal is detached.\n    const anchorNode = this._document.createComment('dom-portal');\n\n    element.parentNode!.insertBefore(anchorNode, element);\n    this.outletElement.appendChild(element);\n\n    super.setDisposeFn(() => {\n      // We can't use `replaceWith` here because IE doesn't support it.\n      if (anchorNode.parentNode) {\n        anchorNode.parentNode.replaceChild(element, anchorNode);\n      }\n    });\n  }\n\n  /**\n   * Clears out a portal from the DOM.\n   */\n  dispose(): void {\n    super.dispose();\n    if (this.outletElement.parentNode != null) {\n      this.outletElement.parentNode.removeChild(this.outletElement);\n    }\n  }\n\n  /** Gets the root HTMLElement for an instantiated component. */\n  private _getComponentRootNode(componentRef: ComponentRef<any>): HTMLElement {\n    return (componentRef.hostView as EmbeddedViewRef<any>).rootNodes[0] as HTMLElement;\n  }\n}\n\n/**\n * @deprecated Use `DomPortalOutlet` instead.\n * @breaking-change 9.0.0\n */\nexport class DomPortalHost extends DomPortalOutlet {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  ComponentFactoryResolver,\n  ComponentRef,\n  Directive,\n  EmbeddedViewRef,\n  EventEmitter,\n  NgModule,\n  OnDestroy,\n  OnInit,\n  Output,\n  TemplateRef,\n  ViewContainerRef,\n  Inject,\n} from '@angular/core';\nimport {DOCUMENT} from '@angular/common';\nimport {BasePortalOutlet, ComponentPortal, Portal, TemplatePortal, DomPortal} from './portal';\n\n\n/**\n * Directive version of a `TemplatePortal`. Because the directive *is* a TemplatePortal,\n * the directive instance itself can be attached to a host, enabling declarative use of portals.\n */\n@Directive({\n  selector: '[cdkPortal]',\n  exportAs: 'cdkPortal',\n})\nexport class CdkPortal extends TemplatePortal {\n  constructor(templateRef: TemplateRef<any>, viewContainerRef: ViewContainerRef) {\n    super(templateRef, viewContainerRef);\n  }\n}\n\n/**\n * @deprecated Use `CdkPortal` instead.\n * @breaking-change 9.0.0\n */\n@Directive({\n  selector: '[cdk-portal], [portal]',\n  exportAs: 'cdkPortal',\n  providers: [{\n    provide: CdkPortal,\n    useExisting: TemplatePortalDirective\n  }]\n})\nexport class TemplatePortalDirective extends CdkPortal {}\n\n/**\n * Possible attached references to the CdkPortalOutlet.\n */\nexport type CdkPortalOutletAttachedRef = ComponentRef<any> | EmbeddedViewRef<any> | null;\n\n\n/**\n * Directive version of a PortalOutlet. Because the directive *is* a PortalOutlet, portals can be\n * directly attached to it, enabling declarative use.\n *\n * Usage:\n * `<ng-template [cdkPortalOutlet]=\"greeting\"></ng-template>`\n */\n@Directive({\n  selector: '[cdkPortalOutlet]',\n  exportAs: 'cdkPortalOutlet',\n  inputs: ['portal: cdkPortalOutlet']\n})\nexport class CdkPortalOutlet extends BasePortalOutlet implements OnInit, OnDestroy {\n  private _document: Document;\n\n  /** Whether the portal component is initialized. */\n  private _isInitialized = false;\n\n  /** Reference to the currently-attached component/view ref. */\n  private _attachedRef: CdkPortalOutletAttachedRef;\n\n  constructor(\n      private _componentFactoryResolver: ComponentFactoryResolver,\n      private _viewContainerRef: ViewContainerRef,\n\n      /**\n       * @deprecated `_document` parameter to be made required.\n       * @breaking-change 9.0.0\n       */\n      @Inject(DOCUMENT) _document?: any) {\n    super();\n    this._document = _document;\n  }\n\n  /** Portal associated with the Portal outlet. */\n  get portal(): Portal<any> | null {\n    return this._attachedPortal;\n  }\n\n  set portal(portal: Portal<any> | null) {\n    // Ignore the cases where the `portal` is set to a falsy value before the lifecycle hooks have\n    // run. This handles the cases where the user might do something like `<div cdkPortalOutlet>`\n    // and attach a portal programmatically in the parent component. When Angular does the first CD\n    // round, it will fire the setter with empty string, causing the user's content to be cleared.\n    if (this.hasAttached() && !portal && !this._isInitialized) {\n      return;\n    }\n\n    if (this.hasAttached()) {\n      super.detach();\n    }\n\n    if (portal) {\n      super.attach(portal);\n    }\n\n    this._attachedPortal = portal;\n  }\n\n  /** Emits when a portal is attached to the outlet. */\n  @Output() attached: EventEmitter<CdkPortalOutletAttachedRef> =\n      new EventEmitter<CdkPortalOutletAttachedRef>();\n\n  /** Component or view reference that is attached to the portal. */\n  get attachedRef(): CdkPortalOutletAttachedRef {\n    return this._attachedRef;\n  }\n\n  ngOnInit() {\n    this._isInitialized = true;\n  }\n\n  ngOnDestroy() {\n    super.dispose();\n    this._attachedPortal = null;\n    this._attachedRef = null;\n  }\n\n  /**\n   * Attach the given ComponentPortal to this PortalOutlet using the ComponentFactoryResolver.\n   *\n   * @param portal Portal to be attached to the portal outlet.\n   * @returns Reference to the created component.\n   */\n  attachComponentPortal<T>(portal: ComponentPortal<T>): ComponentRef<T> {\n    portal.setAttachedHost(this);\n\n    // If the portal specifies an origin, use that as the logical location of the component\n    // in the application tree. Otherwise use the location of this PortalOutlet.\n    const viewContainerRef = portal.viewContainerRef != null ?\n        portal.viewContainerRef :\n        this._viewContainerRef;\n\n    const resolver = portal.componentFactoryResolver || this._componentFactoryResolver;\n    const componentFactory = resolver.resolveComponentFactory(portal.component);\n    const ref = viewContainerRef.createComponent(\n        componentFactory, viewContainerRef.length,\n        portal.injector || viewContainerRef.injector);\n\n    // If we're using a view container that's different from the injected one (e.g. when the portal\n    // specifies its own) we need to move the component into the outlet, otherwise it'll be rendered\n    // inside of the alternate view container.\n    if (viewContainerRef !== this._viewContainerRef) {\n      this._getRootNode().appendChild((ref.hostView as EmbeddedViewRef<any>).rootNodes[0]);\n    }\n\n    super.setDisposeFn(() => ref.destroy());\n    this._attachedPortal = portal;\n    this._attachedRef = ref;\n    this.attached.emit(ref);\n\n    return ref;\n  }\n\n  /**\n   * Attach the given TemplatePortal to this PortalHost as an embedded View.\n   * @param portal Portal to be attached.\n   * @returns Reference to the created embedded view.\n   */\n  attachTemplatePortal<C>(portal: TemplatePortal<C>): EmbeddedViewRef<C> {\n    portal.setAttachedHost(this);\n    const viewRef = this._viewContainerRef.createEmbeddedView(portal.templateRef, portal.context);\n    super.setDisposeFn(() => this._viewContainerRef.clear());\n\n    this._attachedPortal = portal;\n    this._attachedRef = viewRef;\n    this.attached.emit(viewRef);\n\n    return viewRef;\n  }\n\n  /**\n   * Attaches the given DomPortal to this PortalHost by moving all of the portal content into it.\n   * @param portal Portal to be attached.\n   * @deprecated To be turned into a method.\n   * @breaking-change 10.0.0\n   */\n  attachDomPortal = (portal: DomPortal) => {\n    // @breaking-change 9.0.0 Remove check and error once the\n    // `_document` constructor parameter is required.\n    if (!this._document && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw Error('Cannot attach DOM portal without _document constructor parameter');\n    }\n\n    const element = portal.element;\n    if (!element.parentNode && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw Error('DOM portal content must be attached to a parent node.');\n    }\n\n    // Anchor used to save the element's previous position so\n    // that we can restore it when the portal is detached.\n    const anchorNode = this._document.createComment('dom-portal');\n\n    portal.setAttachedHost(this);\n    element.parentNode!.insertBefore(anchorNode, element);\n    this._getRootNode().appendChild(element);\n\n    super.setDisposeFn(() => {\n      if (anchorNode.parentNode) {\n        anchorNode.parentNode!.replaceChild(element, anchorNode);\n      }\n    });\n  }\n\n  /** Gets the root node of the portal outlet. */\n  private _getRootNode(): HTMLElement {\n    const nativeElement: Node = this._viewContainerRef.element.nativeElement;\n\n    // The directive could be set on a template which will result in a comment\n    // node being the root. Use the comment's parent node if that is the case.\n    return (nativeElement.nodeType === nativeElement.ELEMENT_NODE ?\n           nativeElement : nativeElement.parentNode!) as HTMLElement;\n  }\n\n  static ngAcceptInputType_portal: Portal<any> | null | undefined | '';\n}\n\n/**\n * @deprecated Use `CdkPortalOutlet` instead.\n * @breaking-change 9.0.0\n */\n@Directive({\n  selector: '[cdkPortalHost], [portalHost]',\n  exportAs: 'cdkPortalHost',\n  inputs: ['portal: cdkPortalHost'],\n  providers: [{\n    provide: CdkPortalOutlet,\n    useExisting: PortalHostDirective\n  }]\n})\nexport class PortalHostDirective extends CdkPortalOutlet {}\n\n\n@NgModule({\n  exports: [CdkPortal, CdkPortalOutlet, TemplatePortalDirective, PortalHostDirective],\n  declarations: [CdkPortal, CdkPortalOutlet, TemplatePortalDirective, PortalHostDirective],\n})\nexport class PortalModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injector} from '@angular/core';\n\n/**\n * Custom injector to be used when providing custom\n * injection tokens to components inside a portal.\n * @docs-private\n * @deprecated Use `Injector.create` instead.\n * @breaking-change 11.0.0\n */\nexport class PortalInjector implements Injector {\n  constructor(\n    private _parentInjector: Injector,\n    private _customTokens: WeakMap<any, any>) { }\n\n  get(token: any, notFoundValue?: any): any {\n    const value = this._customTokens.get(token);\n\n    if (typeof value !== 'undefined') {\n      return value;\n    }\n\n    return this._parentInjector.get<any>(token, notFoundValue);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './portal';\nexport * from './dom-portal-outlet';\nexport * from './portal-directives';\nexport * from './portal-injector';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.concat = rxjs_1.concat;\n//# sourceMappingURL=concat.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ActiveDescendantKeyManager} from '@angular/cdk/a11y';\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {\n  AfterContentInit,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ContentChildren,\n  ElementRef,\n  EventEmitter,\n  Inject,\n  InjectionToken,\n  Input,\n  Output,\n  QueryList,\n  TemplateRef,\n  ViewChild,\n  ViewEncapsulation,\n  OnDestroy,\n  Directive,\n} from '@angular/core';\nimport {\n  CanDisableRipple,\n  CanDisableRippleCtor,\n  MAT_OPTGROUP,\n  MAT_OPTION_PARENT_COMPONENT,\n  _MatOptgroupBase,\n  _MatOptionBase,\n  mixinDisableRipple,\n  MatOption,\n  MatOptgroup,\n} from '@angular/material/core';\nimport {Subscription} from 'rxjs';\n\n\n/**\n * Autocomplete IDs need to be unique across components, so this counter exists outside of\n * the component definition.\n */\nlet _uniqueAutocompleteIdCounter = 0;\n\n/** Event object that is emitted when an autocomplete option is selected. */\nexport class MatAutocompleteSelectedEvent {\n  constructor(\n    /** Reference to the autocomplete panel that emitted the event. */\n    public source: _MatAutocompleteBase,\n    /** Option that was selected. */\n    public option: _MatOptionBase) { }\n}\n\n/** Event object that is emitted when an autocomplete option is activated. */\nexport interface MatAutocompleteActivatedEvent {\n  /** Reference to the autocomplete panel that emitted the event. */\n  source: _MatAutocompleteBase;\n\n  /** Option that was selected. */\n  option: _MatOptionBase|null;\n}\n\n// Boilerplate for applying mixins to MatAutocomplete.\n/** @docs-private */\nclass MatAutocompleteBase {}\nconst _MatAutocompleteMixinBase: CanDisableRippleCtor & typeof MatAutocompleteBase =\n    mixinDisableRipple(MatAutocompleteBase);\n\n/** Default `mat-autocomplete` options that can be overridden. */\nexport interface MatAutocompleteDefaultOptions {\n  /** Whether the first option should be highlighted when an autocomplete panel is opened. */\n  autoActiveFirstOption?: boolean;\n}\n\n/** Injection token to be used to override the default options for `mat-autocomplete`. */\nexport const MAT_AUTOCOMPLETE_DEFAULT_OPTIONS =\n    new InjectionToken<MatAutocompleteDefaultOptions>('mat-autocomplete-default-options', {\n      providedIn: 'root',\n      factory: MAT_AUTOCOMPLETE_DEFAULT_OPTIONS_FACTORY,\n    });\n\n/** @docs-private */\nexport function MAT_AUTOCOMPLETE_DEFAULT_OPTIONS_FACTORY(): MatAutocompleteDefaultOptions {\n  return {autoActiveFirstOption: false};\n}\n\n/** Base class with all of the `MatAutocomplete` functionality. */\n@Directive()\nexport abstract class _MatAutocompleteBase extends _MatAutocompleteMixinBase implements\n  AfterContentInit, CanDisableRipple, OnDestroy {\n  private _activeOptionChanges = Subscription.EMPTY;\n\n  /** Class to apply to the panel when it's visible. */\n  protected abstract _visibleClass: string;\n\n  /** Class to apply to the panel when it's hidden. */\n  protected abstract _hiddenClass: string;\n\n  /** Manages active item in option list based on key events. */\n  _keyManager: ActiveDescendantKeyManager<_MatOptionBase>;\n\n  /** Whether the autocomplete panel should be visible, depending on option length. */\n  showPanel: boolean = false;\n\n  /** Whether the autocomplete panel is open. */\n  get isOpen(): boolean { return this._isOpen && this.showPanel; }\n  _isOpen: boolean = false;\n\n  // The @ViewChild query for TemplateRef here needs to be static because some code paths\n  // lead to the overlay being created before change detection has finished for this component.\n  // Notably, another component may trigger `focus` on the autocomplete-trigger.\n\n  /** @docs-private */\n  @ViewChild(TemplateRef, {static: true}) template: TemplateRef<any>;\n\n  /** Element for the panel containing the autocomplete options. */\n  @ViewChild('panel') panel: ElementRef;\n\n  /** @docs-private */\n  abstract options: QueryList<_MatOptionBase>;\n\n  /** @docs-private */\n  abstract optionGroups: QueryList<_MatOptgroupBase>;\n\n  /** Function that maps an option's control value to its display value in the trigger. */\n  @Input() displayWith: ((value: any) => string) | null = null;\n\n  /**\n   * Whether the first option should be highlighted when the autocomplete panel is opened.\n   * Can be configured globally through the `MAT_AUTOCOMPLETE_DEFAULT_OPTIONS` token.\n   */\n  @Input()\n  get autoActiveFirstOption(): boolean { return this._autoActiveFirstOption; }\n  set autoActiveFirstOption(value: boolean) {\n    this._autoActiveFirstOption = coerceBooleanProperty(value);\n  }\n  private _autoActiveFirstOption: boolean;\n\n  /**\n   * Specify the width of the autocomplete panel.  Can be any CSS sizing value, otherwise it will\n   * match the width of its host.\n   */\n  @Input() panelWidth: string | number;\n\n  /** Event that is emitted whenever an option from the list is selected. */\n  @Output() readonly optionSelected: EventEmitter<MatAutocompleteSelectedEvent> =\n      new EventEmitter<MatAutocompleteSelectedEvent>();\n\n  /** Event that is emitted when the autocomplete panel is opened. */\n  @Output() readonly opened: EventEmitter<void> = new EventEmitter<void>();\n\n  /** Event that is emitted when the autocomplete panel is closed. */\n  @Output() readonly closed: EventEmitter<void> = new EventEmitter<void>();\n\n  /** Emits whenever an option is activated using the keyboard. */\n  @Output() readonly optionActivated: EventEmitter<MatAutocompleteActivatedEvent> =\n      new EventEmitter<MatAutocompleteActivatedEvent>();\n\n  /**\n   * Takes classes set on the host mat-autocomplete element and applies them to the panel\n   * inside the overlay container to allow for easy styling.\n   */\n  @Input('class')\n  set classList(value: string) {\n    if (value && value.length) {\n      this._classList = value.split(' ').reduce((classList, className) => {\n        classList[className.trim()] = true;\n        return classList;\n      }, {} as {[key: string]: boolean});\n    } else {\n      this._classList = {};\n    }\n\n    this._setVisibilityClasses(this._classList);\n    this._elementRef.nativeElement.className = '';\n  }\n  _classList: {[key: string]: boolean} = {};\n\n  /** Unique ID to be used by autocomplete trigger's \"aria-owns\" property. */\n  id: string = `mat-autocomplete-${_uniqueAutocompleteIdCounter++}`;\n\n  constructor(\n    private _changeDetectorRef: ChangeDetectorRef,\n    private _elementRef: ElementRef<HTMLElement>,\n    @Inject(MAT_AUTOCOMPLETE_DEFAULT_OPTIONS) defaults: MatAutocompleteDefaultOptions) {\n    super();\n\n    this._autoActiveFirstOption = !!defaults.autoActiveFirstOption;\n  }\n\n  ngAfterContentInit() {\n    this._keyManager = new ActiveDescendantKeyManager<_MatOptionBase>(this.options).withWrap();\n    this._activeOptionChanges = this._keyManager.change.subscribe(index => {\n      this.optionActivated.emit({source: this, option: this.options.toArray()[index] || null});\n    });\n\n    // Set the initial visibility state.\n    this._setVisibility();\n  }\n\n  ngOnDestroy() {\n    this._activeOptionChanges.unsubscribe();\n  }\n\n  /**\n   * Sets the panel scrollTop. This allows us to manually scroll to display options\n   * above or below the fold, as they are not actually being focused when active.\n   */\n  _setScrollTop(scrollTop: number): void {\n    if (this.panel) {\n      this.panel.nativeElement.scrollTop = scrollTop;\n    }\n  }\n\n  /** Returns the panel's scrollTop. */\n  _getScrollTop(): number {\n    return this.panel ? this.panel.nativeElement.scrollTop : 0;\n  }\n\n  /** Panel should hide itself when the option list is empty. */\n  _setVisibility() {\n    this.showPanel = !!this.options.length;\n    this._setVisibilityClasses(this._classList);\n    this._changeDetectorRef.markForCheck();\n  }\n\n  /** Emits the `select` event. */\n  _emitSelectEvent(option: _MatOptionBase): void {\n    const event = new MatAutocompleteSelectedEvent(this, option);\n    this.optionSelected.emit(event);\n  }\n\n  /** Sets the autocomplete visibility classes on a classlist based on the panel is visible. */\n  private _setVisibilityClasses(classList: {[key: string]: boolean}) {\n    classList[this._visibleClass] = this.showPanel;\n    classList[this._hiddenClass] = !this.showPanel;\n  }\n\n  static ngAcceptInputType_autoActiveFirstOption: BooleanInput;\n  static ngAcceptInputType_disableRipple: BooleanInput;\n}\n\n@Component({\n  selector: 'mat-autocomplete',\n  templateUrl: 'autocomplete.html',\n  styleUrls: ['autocomplete.css'],\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  exportAs: 'matAutocomplete',\n  inputs: ['disableRipple'],\n  host: {\n    'class': 'mat-autocomplete'\n  },\n  providers: [\n    {provide: MAT_OPTION_PARENT_COMPONENT, useExisting: MatAutocomplete}\n  ]\n})\nexport class MatAutocomplete extends _MatAutocompleteBase {\n  @ContentChildren(MAT_OPTGROUP, {descendants: true}) optionGroups: QueryList<MatOptgroup>;\n  @ContentChildren(MatOption, {descendants: true}) options: QueryList<MatOption>;\n  protected _visibleClass = 'mat-autocomplete-visible';\n  protected _hiddenClass = 'mat-autocomplete-hidden';\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, ElementRef} from '@angular/core';\n\n/** Base class containing all of the functionality for `MatAutocompleteOrigin`. */\n@Directive()\nexport abstract class _MatAutocompleteOriginBase {\n  constructor(\n    /** Reference to the element on which the directive is applied. */\n    public elementRef: ElementRef<HTMLElement>) {}\n}\n\n/**\n * Directive applied to an element to make it usable\n * as a connection point for an autocomplete panel.\n */\n@Directive({\n  selector: '[matAutocompleteOrigin]',\n  exportAs: 'matAutocompleteOrigin',\n})\nexport class MatAutocompleteOrigin extends _MatAutocompleteOriginBase {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {Directionality} from '@angular/cdk/bidi';\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {DOWN_ARROW, ENTER, ESCAPE, TAB, UP_ARROW} from '@angular/cdk/keycodes';\nimport {\n  FlexibleConnectedPositionStrategy,\n  Overlay,\n  OverlayConfig,\n  OverlayRef,\n  PositionStrategy,\n  ScrollStrategy,\n  ConnectedPosition,\n} from '@angular/cdk/overlay';\nimport {_getShadowRoot} from '@angular/cdk/platform';\nimport {TemplatePortal} from '@angular/cdk/portal';\nimport {ViewportRuler} from '@angular/cdk/scrolling';\nimport {DOCUMENT} from '@angular/common';\nimport {\n  AfterViewInit,\n  ChangeDetectorRef,\n  Directive,\n  ElementRef,\n  forwardRef,\n  Host,\n  Inject,\n  InjectionToken,\n  Input,\n  NgZone,\n  OnDestroy,\n  Optional,\n  ViewContainerRef,\n  OnChanges,\n  SimpleChanges,\n} from '@angular/core';\nimport {ControlValueAccessor, NG_VALUE_ACCESSOR} from '@angular/forms';\nimport {\n  _countGroupLabelsBeforeOption,\n  _getOptionScrollPosition,\n  MatOption,\n  MatOptionSelectionChange,\n} from '@angular/material/core';\nimport {MAT_FORM_FIELD, MatFormField} from '@angular/material/form-field';\nimport {defer, fromEvent, merge, Observable, of as observableOf, Subject, Subscription} from 'rxjs';\nimport {delay, filter, map, switchMap, take, tap} from 'rxjs/operators';\n\nimport {_MatAutocompleteBase} from './autocomplete';\nimport {_MatAutocompleteOriginBase} from './autocomplete-origin';\n\n\n/**\n * The following style constants are necessary to save here in order\n * to properly calculate the scrollTop of the panel. Because we are not\n * actually focusing the active item, scroll must be handled manually.\n */\n\n/**\n * The height of each autocomplete option.\n * @deprecated No longer being used. To be removed.\n * @breaking-change 11.0.0\n */\nexport const AUTOCOMPLETE_OPTION_HEIGHT = 48;\n\n/**\n * The total height of the autocomplete panel.\n * @deprecated No longer being used. To be removed.\n * @breaking-change 11.0.0\n */\nexport const AUTOCOMPLETE_PANEL_HEIGHT = 256;\n\n/** Injection token that determines the scroll handling while the autocomplete panel is open. */\nexport const MAT_AUTOCOMPLETE_SCROLL_STRATEGY =\n    new InjectionToken<() => ScrollStrategy>('mat-autocomplete-scroll-strategy');\n\n/** @docs-private */\nexport function MAT_AUTOCOMPLETE_SCROLL_STRATEGY_FACTORY(overlay: Overlay): () => ScrollStrategy {\n  return () => overlay.scrollStrategies.reposition();\n}\n\n/** @docs-private */\nexport const MAT_AUTOCOMPLETE_SCROLL_STRATEGY_FACTORY_PROVIDER = {\n  provide: MAT_AUTOCOMPLETE_SCROLL_STRATEGY,\n  deps: [Overlay],\n  useFactory: MAT_AUTOCOMPLETE_SCROLL_STRATEGY_FACTORY,\n};\n\n/**\n * Provider that allows the autocomplete to register as a ControlValueAccessor.\n * @docs-private\n */\nexport const MAT_AUTOCOMPLETE_VALUE_ACCESSOR: any = {\n  provide: NG_VALUE_ACCESSOR,\n  useExisting: forwardRef(() => MatAutocompleteTrigger),\n  multi: true\n};\n\n/**\n * Creates an error to be thrown when attempting to use an autocomplete trigger without a panel.\n * @docs-private\n */\nexport function getMatAutocompleteMissingPanelError(): Error {\n  return Error('Attempting to open an undefined instance of `mat-autocomplete`. ' +\n               'Make sure that the id passed to the `matAutocomplete` is correct and that ' +\n               'you\\'re attempting to open it after the ngAfterContentInit hook.');\n}\n\n/** Base class with all of the `MatAutocompleteTrigger` functionality. */\n@Directive()\nexport abstract class _MatAutocompleteTriggerBase implements ControlValueAccessor, AfterViewInit,\n  OnChanges, OnDestroy {\n\n  private _overlayRef: OverlayRef | null;\n  private _portal: TemplatePortal;\n  private _componentDestroyed = false;\n  private _autocompleteDisabled = false;\n  private _scrollStrategy: () => ScrollStrategy;\n\n  /** Old value of the native input. Used to work around issues with the `input` event on IE. */\n  private _previousValue: string | number | null;\n\n  /** Strategy that is used to position the panel. */\n  private _positionStrategy: FlexibleConnectedPositionStrategy;\n\n  /** Whether or not the label state is being overridden. */\n  private _manuallyFloatingLabel = false;\n\n  /** The subscription for closing actions (some are bound to document). */\n  private _closingActionsSubscription: Subscription;\n\n  /** Subscription to viewport size changes. */\n  private _viewportSubscription = Subscription.EMPTY;\n\n  /**\n   * Whether the autocomplete can open the next time it is focused. Used to prevent a focused,\n   * closed autocomplete from being reopened if the user switches to another browser tab and then\n   * comes back.\n   */\n  private _canOpenOnNextFocus = true;\n\n  /** Whether the element is inside of a ShadowRoot component. */\n  private _isInsideShadowRoot: boolean;\n\n  /** Stream of keyboard events that can close the panel. */\n  private readonly _closeKeyEventStream = new Subject<void>();\n\n  /**\n   * Event handler for when the window is blurred. Needs to be an\n   * arrow function in order to preserve the context.\n   */\n  private _windowBlurHandler = () => {\n    // If the user blurred the window while the autocomplete is focused, it means that it'll be\n    // refocused when they come back. In this case we want to skip the first focus event, if the\n    // pane was closed, in order to avoid reopening it unintentionally.\n    this._canOpenOnNextFocus =\n        this._document.activeElement !== this._element.nativeElement || this.panelOpen;\n  }\n\n  /** `View -> model callback called when value changes` */\n  _onChange: (value: any) => void = () => {};\n\n  /** `View -> model callback called when autocomplete has been touched` */\n  _onTouched = () => {};\n\n  /** The autocomplete panel to be attached to this trigger. */\n  @Input('matAutocomplete') autocomplete: _MatAutocompleteBase;\n\n  /**\n   * Position of the autocomplete panel relative to the trigger element. A position of `auto`\n   * will render the panel underneath the trigger if there is enough space for it to fit in\n   * the viewport, otherwise the panel will be shown above it. If the position is set to\n   * `above` or `below`, the panel will always be shown above or below the trigger. no matter\n   * whether it fits completely in the viewport.\n   */\n  @Input('matAutocompletePosition') position: 'auto' | 'above' | 'below' = 'auto';\n\n  /**\n   * Reference relative to which to position the autocomplete panel.\n   * Defaults to the autocomplete trigger element.\n   */\n  @Input('matAutocompleteConnectedTo') connectedTo: _MatAutocompleteOriginBase;\n\n  /**\n   * `autocomplete` attribute to be set on the input element.\n   * @docs-private\n   */\n  @Input('autocomplete') autocompleteAttribute: string = 'off';\n\n  /**\n   * Whether the autocomplete is disabled. When disabled, the element will\n   * act as a regular input and the user won't be able to open the panel.\n   */\n  @Input('matAutocompleteDisabled')\n  get autocompleteDisabled(): boolean { return this._autocompleteDisabled; }\n  set autocompleteDisabled(value: boolean) {\n    this._autocompleteDisabled = coerceBooleanProperty(value);\n  }\n\n  constructor(private _element: ElementRef<HTMLInputElement>, private _overlay: Overlay,\n              private _viewContainerRef: ViewContainerRef,\n              private _zone: NgZone,\n              private _changeDetectorRef: ChangeDetectorRef,\n              @Inject(MAT_AUTOCOMPLETE_SCROLL_STRATEGY) scrollStrategy: any,\n              @Optional() private _dir: Directionality,\n              @Optional() @Inject(MAT_FORM_FIELD) @Host() private _formField: MatFormField,\n              @Optional() @Inject(DOCUMENT) private _document: any,\n              private _viewportRuler: ViewportRuler) {\n    this._scrollStrategy = scrollStrategy;\n  }\n\n  /** Class to apply to the panel when it's above the input. */\n  protected abstract _aboveClass: string;\n\n  ngAfterViewInit() {\n    const window = this._getWindow();\n\n    if (typeof window !== 'undefined') {\n      this._zone.runOutsideAngular(() => window.addEventListener('blur', this._windowBlurHandler));\n    }\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    if (changes['position'] && this._positionStrategy) {\n      this._setStrategyPositions(this._positionStrategy);\n\n      if (this.panelOpen) {\n        this._overlayRef!.updatePosition();\n      }\n    }\n  }\n\n  ngOnDestroy() {\n    const window = this._getWindow();\n\n    if (typeof window !== 'undefined') {\n      window.removeEventListener('blur', this._windowBlurHandler);\n    }\n\n    this._viewportSubscription.unsubscribe();\n    this._componentDestroyed = true;\n    this._destroyPanel();\n    this._closeKeyEventStream.complete();\n  }\n\n  /** Whether or not the autocomplete panel is open. */\n  get panelOpen(): boolean {\n    return this._overlayAttached && this.autocomplete.showPanel;\n  }\n  private _overlayAttached: boolean = false;\n\n  /** Opens the autocomplete suggestion panel. */\n  openPanel(): void {\n    this._attachOverlay();\n    this._floatLabel();\n  }\n\n  /** Closes the autocomplete suggestion panel. */\n  closePanel(): void {\n    this._resetLabel();\n\n    if (!this._overlayAttached) {\n      return;\n    }\n\n    if (this.panelOpen) {\n      // Only emit if the panel was visible.\n      this.autocomplete.closed.emit();\n    }\n\n    this.autocomplete._isOpen = this._overlayAttached = false;\n\n    if (this._overlayRef && this._overlayRef.hasAttached()) {\n      this._overlayRef.detach();\n      this._closingActionsSubscription.unsubscribe();\n    }\n\n    // Note that in some cases this can end up being called after the component is destroyed.\n    // Add a check to ensure that we don't try to run change detection on a destroyed view.\n    if (!this._componentDestroyed) {\n      // We need to trigger change detection manually, because\n      // `fromEvent` doesn't seem to do it at the proper time.\n      // This ensures that the label is reset when the\n      // user clicks outside.\n      this._changeDetectorRef.detectChanges();\n    }\n  }\n\n  /**\n   * Updates the position of the autocomplete suggestion panel to ensure that it fits all options\n   * within the viewport.\n   */\n  updatePosition(): void {\n    if (this._overlayAttached) {\n      this._overlayRef!.updatePosition();\n    }\n  }\n\n  /**\n   * A stream of actions that should close the autocomplete panel, including\n   * when an option is selected, on blur, and when TAB is pressed.\n   */\n  get panelClosingActions(): Observable<MatOptionSelectionChange|null> {\n    return merge(\n      this.optionSelections,\n      this.autocomplete._keyManager.tabOut.pipe(filter(() => this._overlayAttached)),\n      this._closeKeyEventStream,\n      this._getOutsideClickStream(),\n      this._overlayRef ?\n          this._overlayRef.detachments().pipe(filter(() => this._overlayAttached)) :\n          observableOf()\n    ).pipe(\n      // Normalize the output so we return a consistent type.\n      map(event => event instanceof MatOptionSelectionChange ? event : null)\n    );\n  }\n\n  /** Stream of autocomplete option selections. */\n  readonly optionSelections: Observable<MatOptionSelectionChange> = defer(() => {\n    if (this.autocomplete && this.autocomplete.options) {\n      return merge(...this.autocomplete.options.map(option => option.onSelectionChange));\n    }\n\n    // If there are any subscribers before `ngAfterViewInit`, the `autocomplete` will be undefined.\n    // Return a stream that we'll replace with the real one once everything is in place.\n    return this._zone.onStable\n        .pipe(take(1), switchMap(() => this.optionSelections));\n  }) as Observable<MatOptionSelectionChange>;\n\n  /** The currently active option, coerced to MatOption type. */\n  get activeOption(): MatOption | null {\n    if (this.autocomplete && this.autocomplete._keyManager) {\n      return this.autocomplete._keyManager.activeItem;\n    }\n\n    return null;\n  }\n\n  /** Stream of clicks outside of the autocomplete panel. */\n  private _getOutsideClickStream(): Observable<any> {\n    return merge(\n            fromEvent(this._document, 'click') as Observable<MouseEvent>,\n            fromEvent(this._document, 'touchend') as Observable<TouchEvent>)\n        .pipe(filter(event => {\n          // If we're in the Shadow DOM, the event target will be the shadow root, so we have to\n          // fall back to check the first element in the path of the click event.\n          const clickTarget =\n              (this._isInsideShadowRoot && event.composedPath ? event.composedPath()[0] :\n                                                                event.target) as HTMLElement;\n          const formField = this._formField ? this._formField._elementRef.nativeElement : null;\n          const customOrigin = this.connectedTo ? this.connectedTo.elementRef.nativeElement : null;\n\n          return this._overlayAttached && clickTarget !== this._element.nativeElement &&\n              (!formField || !formField.contains(clickTarget)) &&\n              (!customOrigin || !customOrigin.contains(clickTarget)) &&\n              (!!this._overlayRef && !this._overlayRef.overlayElement.contains(clickTarget));\n        }));\n  }\n\n  // Implemented as part of ControlValueAccessor.\n  writeValue(value: any): void {\n    Promise.resolve(null).then(() => this._setTriggerValue(value));\n  }\n\n  // Implemented as part of ControlValueAccessor.\n  registerOnChange(fn: (value: any) => {}): void {\n    this._onChange = fn;\n  }\n\n  // Implemented as part of ControlValueAccessor.\n  registerOnTouched(fn: () => {}) {\n    this._onTouched = fn;\n  }\n\n  // Implemented as part of ControlValueAccessor.\n  setDisabledState(isDisabled: boolean) {\n    this._element.nativeElement.disabled = isDisabled;\n  }\n\n  _handleKeydown(event: KeyboardEvent): void {\n    const keyCode = event.keyCode;\n\n    // Prevent the default action on all escape key presses. This is here primarily to bring IE\n    // in line with other browsers. By default, pressing escape on IE will cause it to revert\n    // the input value to the one that it had on focus, however it won't dispatch any events\n    // which means that the model value will be out of sync with the view.\n    if (keyCode === ESCAPE) {\n      event.preventDefault();\n    }\n\n    if (this.activeOption && keyCode === ENTER && this.panelOpen) {\n      this.activeOption._selectViaInteraction();\n      this._resetActiveItem();\n      event.preventDefault();\n    } else if (this.autocomplete) {\n      const prevActiveItem = this.autocomplete._keyManager.activeItem;\n      const isArrowKey = keyCode === UP_ARROW || keyCode === DOWN_ARROW;\n\n      if (this.panelOpen || keyCode === TAB) {\n        this.autocomplete._keyManager.onKeydown(event);\n      } else if (isArrowKey && this._canOpen()) {\n        this.openPanel();\n      }\n\n      if (isArrowKey || this.autocomplete._keyManager.activeItem !== prevActiveItem) {\n        this._scrollToOption(this.autocomplete._keyManager.activeItemIndex || 0);\n      }\n    }\n  }\n\n  _handleInput(event: KeyboardEvent): void {\n    let target = event.target as HTMLInputElement;\n    let value: number | string | null = target.value;\n\n    // Based on `NumberValueAccessor` from forms.\n    if (target.type === 'number') {\n      value = value == '' ? null : parseFloat(value);\n    }\n\n    // If the input has a placeholder, IE will fire the `input` event on page load,\n    // focus and blur, in addition to when the user actually changed the value. To\n    // filter out all of the extra events, we save the value on focus and between\n    // `input` events, and we check whether it changed.\n    // See: https://connect.microsoft.com/IE/feedback/details/885747/\n    if (this._previousValue !== value) {\n      this._previousValue = value;\n      this._onChange(value);\n\n      if (this._canOpen() && this._document.activeElement === event.target) {\n        this.openPanel();\n      }\n    }\n  }\n\n  _handleFocus(): void {\n    if (!this._canOpenOnNextFocus) {\n      this._canOpenOnNextFocus = true;\n    } else if (this._canOpen()) {\n      this._previousValue = this._element.nativeElement.value;\n      this._attachOverlay();\n      this._floatLabel(true);\n    }\n  }\n\n  /**\n   * In \"auto\" mode, the label will animate down as soon as focus is lost.\n   * This causes the value to jump when selecting an option with the mouse.\n   * This method manually floats the label until the panel can be closed.\n   * @param shouldAnimate Whether the label should be animated when it is floated.\n   */\n  private _floatLabel(shouldAnimate = false): void {\n    if (this._formField && this._formField.floatLabel === 'auto') {\n      if (shouldAnimate) {\n        this._formField._animateAndLockLabel();\n      } else {\n        this._formField.floatLabel = 'always';\n      }\n\n      this._manuallyFloatingLabel = true;\n    }\n  }\n\n  /** If the label has been manually elevated, return it to its normal state. */\n  private _resetLabel(): void  {\n    if (this._manuallyFloatingLabel) {\n      this._formField.floatLabel = 'auto';\n      this._manuallyFloatingLabel = false;\n    }\n  }\n\n  /**\n   * This method listens to a stream of panel closing actions and resets the\n   * stream every time the option list changes.\n   */\n  private _subscribeToClosingActions(): Subscription {\n    const firstStable = this._zone.onStable.pipe(take(1));\n    const optionChanges = this.autocomplete.options.changes.pipe(\n      tap(() => this._positionStrategy.reapplyLastPosition()),\n      // Defer emitting to the stream until the next tick, because changing\n      // bindings in here will cause \"changed after checked\" errors.\n      delay(0)\n    );\n\n    // When the zone is stable initially, and when the option list changes...\n    return merge(firstStable, optionChanges)\n        .pipe(\n            // create a new stream of panelClosingActions, replacing any previous streams\n            // that were created, and flatten it so our stream only emits closing events...\n            switchMap(() => {\n              const wasOpen = this.panelOpen;\n              this._resetActiveItem();\n              this.autocomplete._setVisibility();\n\n              if (this.panelOpen) {\n                this._overlayRef!.updatePosition();\n\n                // If the `panelOpen` state changed, we need to make sure to emit the `opened`\n                // event, because we may not have emitted it when the panel was attached. This\n                // can happen if the users opens the panel and there are no options, but the\n                // options come in slightly later or as a result of the value changing.\n                if (wasOpen !== this.panelOpen) {\n                  this.autocomplete.opened.emit();\n                }\n              }\n\n              return this.panelClosingActions;\n            }),\n            // when the first closing event occurs...\n            take(1))\n        // set the value, close the panel, and complete.\n        .subscribe(event => this._setValueAndClose(event));\n  }\n\n  /** Destroys the autocomplete suggestion panel. */\n  private _destroyPanel(): void {\n    if (this._overlayRef) {\n      this.closePanel();\n      this._overlayRef.dispose();\n      this._overlayRef = null;\n    }\n  }\n\n  private _setTriggerValue(value: any): void {\n    const toDisplay = this.autocomplete && this.autocomplete.displayWith ?\n      this.autocomplete.displayWith(value) :\n      value;\n\n    // Simply falling back to an empty string if the display value is falsy does not work properly.\n    // The display value can also be the number zero and shouldn't fall back to an empty string.\n    const inputValue = toDisplay != null ? toDisplay : '';\n\n    // If it's used within a `MatFormField`, we should set it through the property so it can go\n    // through change detection.\n    if (this._formField) {\n      this._formField._control.value = inputValue;\n    } else {\n      this._element.nativeElement.value = inputValue;\n    }\n\n    this._previousValue = inputValue;\n  }\n\n  /**\n   * This method closes the panel, and if a value is specified, also sets the associated\n   * control to that value. It will also mark the control as dirty if this interaction\n   * stemmed from the user.\n   */\n  private _setValueAndClose(event: MatOptionSelectionChange | null): void {\n    if (event && event.source) {\n      this._clearPreviousSelectedOption(event.source);\n      this._setTriggerValue(event.source.value);\n      this._onChange(event.source.value);\n      this._element.nativeElement.focus();\n      this.autocomplete._emitSelectEvent(event.source);\n    }\n\n    this.closePanel();\n  }\n\n  /**\n   * Clear any previous selected option and emit a selection change event for this option\n   */\n  private _clearPreviousSelectedOption(skip: MatOption) {\n    this.autocomplete.options.forEach(option => {\n      if (option != skip && option.selected) {\n        option.deselect();\n      }\n    });\n  }\n\n  private _attachOverlay(): void {\n    if (!this.autocomplete && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw getMatAutocompleteMissingPanelError();\n    }\n\n    // We want to resolve this once, as late as possible so that we can be\n    // sure that the element has been moved into its final place in the DOM.\n    if (this._isInsideShadowRoot == null) {\n      this._isInsideShadowRoot = !!_getShadowRoot(this._element.nativeElement);\n    }\n\n    let overlayRef = this._overlayRef;\n\n    if (!overlayRef) {\n      this._portal = new TemplatePortal(this.autocomplete.template, this._viewContainerRef);\n      overlayRef = this._overlay.create(this._getOverlayConfig());\n      this._overlayRef = overlayRef;\n\n      // Use the `keydownEvents` in order to take advantage of\n      // the overlay event targeting provided by the CDK overlay.\n      overlayRef.keydownEvents().subscribe(event => {\n        // Close when pressing ESCAPE or ALT + UP_ARROW, based on the a11y guidelines.\n        // See: https://www.w3.org/TR/wai-aria-practices-1.1/#textbox-keyboard-interaction\n        if (event.keyCode === ESCAPE || (event.keyCode === UP_ARROW && event.altKey)) {\n          this._resetActiveItem();\n          this._closeKeyEventStream.next();\n\n          // We need to stop propagation, otherwise the event will eventually\n          // reach the input itself and cause the overlay to be reopened.\n          event.stopPropagation();\n          event.preventDefault();\n        }\n      });\n\n      this._viewportSubscription = this._viewportRuler.change().subscribe(() => {\n        if (this.panelOpen && overlayRef) {\n          overlayRef.updateSize({width: this._getPanelWidth()});\n        }\n      });\n    } else {\n      // Update the trigger, panel width and direction, in case anything has changed.\n      this._positionStrategy.setOrigin(this._getConnectedElement());\n      overlayRef.updateSize({width: this._getPanelWidth()});\n    }\n\n    if (overlayRef && !overlayRef.hasAttached()) {\n      overlayRef.attach(this._portal);\n      this._closingActionsSubscription = this._subscribeToClosingActions();\n    }\n\n    const wasOpen = this.panelOpen;\n\n    this.autocomplete._setVisibility();\n    this.autocomplete._isOpen = this._overlayAttached = true;\n\n    // We need to do an extra `panelOpen` check in here, because the\n    // autocomplete won't be shown if there are no options.\n    if (this.panelOpen && wasOpen !== this.panelOpen) {\n      this.autocomplete.opened.emit();\n    }\n  }\n\n  private _getOverlayConfig(): OverlayConfig {\n    return new OverlayConfig({\n      positionStrategy: this._getOverlayPosition(),\n      scrollStrategy: this._scrollStrategy(),\n      width: this._getPanelWidth(),\n      direction: this._dir\n    });\n  }\n\n  private _getOverlayPosition(): PositionStrategy {\n    const strategy = this._overlay.position()\n      .flexibleConnectedTo(this._getConnectedElement())\n      .withFlexibleDimensions(false)\n      .withPush(false);\n\n    this._setStrategyPositions(strategy);\n    this._positionStrategy = strategy;\n    return strategy;\n  }\n\n  /** Sets the positions on a position strategy based on the directive's input state. */\n  private _setStrategyPositions(positionStrategy: FlexibleConnectedPositionStrategy) {\n    // Note that we provide horizontal fallback positions, even though by default the dropdown\n    // width matches the input, because consumers can override the width. See #18854.\n    const belowPositions: ConnectedPosition[] = [\n      {originX: 'start', originY: 'bottom', overlayX: 'start', overlayY: 'top'},\n      {originX: 'end', originY: 'bottom', overlayX: 'end', overlayY: 'top'}\n    ];\n\n    // The overlay edge connected to the trigger should have squared corners, while\n    // the opposite end has rounded corners. We apply a CSS class to swap the\n    // border-radius based on the overlay position.\n    const panelClass = this._aboveClass;\n    const abovePositions: ConnectedPosition[] = [\n      {originX: 'start', originY: 'top', overlayX: 'start', overlayY: 'bottom', panelClass},\n      {originX: 'end', originY: 'top', overlayX: 'end', overlayY: 'bottom', panelClass}\n    ];\n\n    let positions: ConnectedPosition[];\n\n    if (this.position === 'above') {\n      positions = abovePositions;\n    } else if (this.position === 'below') {\n      positions = belowPositions;\n    } else {\n      positions = [...belowPositions, ...abovePositions];\n    }\n\n    positionStrategy.withPositions(positions);\n  }\n\n  private _getConnectedElement(): ElementRef<HTMLElement> {\n    if (this.connectedTo) {\n      return this.connectedTo.elementRef;\n    }\n\n    return this._formField ? this._formField.getConnectedOverlayOrigin() : this._element;\n  }\n\n  private _getPanelWidth(): number | string {\n    return this.autocomplete.panelWidth || this._getHostWidth();\n  }\n\n  /** Returns the width of the input element, so the panel width can match it. */\n  private _getHostWidth(): number {\n    return this._getConnectedElement().nativeElement.getBoundingClientRect().width;\n  }\n\n  /**\n   * Resets the active item to -1 so arrow events will activate the\n   * correct options, or to 0 if the consumer opted into it.\n   */\n  private _resetActiveItem(): void {\n    this.autocomplete._keyManager.setActiveItem(this.autocomplete.autoActiveFirstOption ? 0 : -1);\n  }\n\n  /** Determines whether the panel can be opened. */\n  private _canOpen(): boolean {\n    const element = this._element.nativeElement;\n    return !element.readOnly && !element.disabled && !this._autocompleteDisabled;\n  }\n\n  /** Use defaultView of injected document if available or fallback to global window reference */\n  private _getWindow(): Window {\n    return this._document?.defaultView || window;\n  }\n\n  /** Scrolls to a particular option in the list. */\n  private _scrollToOption(index: number): void {\n    // Given that we are not actually focusing active options, we must manually adjust scroll\n    // to reveal options below the fold. First, we find the offset of the option from the top\n    // of the panel. If that offset is below the fold, the new scrollTop will be the offset -\n    // the panel height + the option height, so the active option will be just visible at the\n    // bottom of the panel. If that offset is above the top of the visible panel, the new scrollTop\n    // will become the offset. If that offset is visible within the panel already, the scrollTop is\n    // not adjusted.\n    const autocomplete = this.autocomplete;\n    const labelCount = _countGroupLabelsBeforeOption(index,\n      autocomplete.options, autocomplete.optionGroups);\n\n    if (index === 0 && labelCount === 1) {\n      // If we've got one group label before the option and we're at the top option,\n      // scroll the list to the top. This is better UX than scrolling the list to the\n      // top of the option, because it allows the user to read the top group's label.\n      autocomplete._setScrollTop(0);\n    } else {\n      const option = autocomplete.options.toArray()[index];\n\n      if (option) {\n        const element = option._getHostElement();\n        const newScrollPosition = _getOptionScrollPosition(\n          element.offsetTop,\n          element.offsetHeight,\n          autocomplete._getScrollTop(),\n          autocomplete.panel.nativeElement.offsetHeight\n        );\n\n        autocomplete._setScrollTop(newScrollPosition);\n      }\n    }\n  }\n\n  static ngAcceptInputType_autocompleteDisabled: BooleanInput;\n}\n\n\n@Directive({\n  selector: `input[matAutocomplete], textarea[matAutocomplete]`,\n  host: {\n    'class': 'mat-autocomplete-trigger',\n    '[attr.autocomplete]': 'autocompleteAttribute',\n    '[attr.role]': 'autocompleteDisabled ? null : \"combobox\"',\n    '[attr.aria-autocomplete]': 'autocompleteDisabled ? null : \"list\"',\n    '[attr.aria-activedescendant]': '(panelOpen && activeOption) ? activeOption.id : null',\n    '[attr.aria-expanded]': 'autocompleteDisabled ? null : panelOpen.toString()',\n    '[attr.aria-owns]': '(autocompleteDisabled || !panelOpen) ? null : autocomplete?.id',\n    '[attr.aria-haspopup]': '!autocompleteDisabled',\n    // Note: we use `focusin`, as opposed to `focus`, in order to open the panel\n    // a little earlier. This avoids issues where IE delays the focusing of the input.\n    '(focusin)': '_handleFocus()',\n    '(blur)': '_onTouched()',\n    '(input)': '_handleInput($event)',\n    '(keydown)': '_handleKeydown($event)',\n  },\n  exportAs: 'matAutocompleteTrigger',\n  providers: [MAT_AUTOCOMPLETE_VALUE_ACCESSOR]\n})\nexport class MatAutocompleteTrigger extends _MatAutocompleteTriggerBase {\n  protected _aboveClass = 'mat-autocomplete-panel-above';\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgModule} from '@angular/core';\nimport {CommonModule} from '@angular/common';\nimport {OverlayModule} from '@angular/cdk/overlay';\nimport {MatOptionModule, MatCommonModule} from '@angular/material/core';\nimport {CdkScrollableModule} from '@angular/cdk/scrolling';\nimport {MatAutocomplete} from './autocomplete';\nimport {\n  MatAutocompleteTrigger,\n  MAT_AUTOCOMPLETE_SCROLL_STRATEGY_FACTORY_PROVIDER,\n} from './autocomplete-trigger';\nimport {MatAutocompleteOrigin} from './autocomplete-origin';\n\n\n@NgModule({\n  imports: [\n    OverlayModule,\n    MatOptionModule,\n    MatCommonModule,\n    CommonModule\n  ],\n  exports: [\n    MatAutocomplete,\n    MatAutocompleteTrigger,\n    MatAutocompleteOrigin,\n    CdkScrollableModule,\n    MatOptionModule,\n    MatCommonModule,\n  ],\n  declarations: [MatAutocomplete, MatAutocompleteTrigger, MatAutocompleteOrigin],\n  providers: [MAT_AUTOCOMPLETE_SCROLL_STRATEGY_FACTORY_PROVIDER],\n})\nexport class MatAutocompleteModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './autocomplete';\nexport * from './autocomplete-module';\nexport * from './autocomplete-trigger';\nexport * from './autocomplete-origin';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","import { Subscriber } from '../Subscriber';\nimport { empty } from '../observable/empty';\nexport function repeat(count = -1) {\n    return (source) => {\n        if (count === 0) {\n            return empty();\n        }\n        else if (count < 0) {\n            return source.lift(new RepeatOperator(-1, source));\n        }\n        else {\n            return source.lift(new RepeatOperator(count - 1, source));\n        }\n    };\n}\nclass RepeatOperator {\n    constructor(count, source) {\n        this.count = count;\n        this.source = source;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new RepeatSubscriber(subscriber, this.count, this.source));\n    }\n}\nclass RepeatSubscriber extends Subscriber {\n    constructor(destination, count, source) {\n        super(destination);\n        this.count = count;\n        this.source = source;\n    }\n    complete() {\n        if (!this.isStopped) {\n            const { source, count } = this;\n            if (count === 0) {\n                return super.complete();\n            }\n            else if (count > -1) {\n                this.count = count - 1;\n            }\n            source.subscribe(this._unsubscribeAndRecycle());\n        }\n    }\n}\n//# sourceMappingURL=repeat.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Platform} from '@angular/cdk/platform';\nimport {DOCUMENT} from '@angular/common';\nimport {\n  AfterViewInit,\n  ChangeDetectionStrategy,\n  Component,\n  ContentChildren,\n  Directive,\n  ElementRef,\n  Inject,\n  QueryList,\n  ViewEncapsulation,\n} from '@angular/core';\nimport {CanColor, CanColorCtor, mixinColor} from '@angular/material/core';\n\n\n// Boilerplate for applying mixins to MatToolbar.\n/** @docs-private */\nclass MatToolbarBase {\n  constructor(public _elementRef: ElementRef) {}\n}\nconst _MatToolbarMixinBase: CanColorCtor & typeof MatToolbarBase = mixinColor(MatToolbarBase);\n\n@Directive({\n  selector: 'mat-toolbar-row',\n  exportAs: 'matToolbarRow',\n  host: {'class': 'mat-toolbar-row'},\n})\nexport class MatToolbarRow {}\n\n@Component({\n  selector: 'mat-toolbar',\n  exportAs: 'matToolbar',\n  templateUrl: 'toolbar.html',\n  styleUrls: ['toolbar.css'],\n  inputs: ['color'],\n  host: {\n    'class': 'mat-toolbar',\n    '[class.mat-toolbar-multiple-rows]': '_toolbarRows.length > 0',\n    '[class.mat-toolbar-single-row]': '_toolbarRows.length === 0',\n  },\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  encapsulation: ViewEncapsulation.None,\n})\nexport class MatToolbar extends _MatToolbarMixinBase implements CanColor, AfterViewInit {\n  private _document: Document;\n\n  /** Reference to all toolbar row elements that have been projected. */\n  @ContentChildren(MatToolbarRow, {descendants: true}) _toolbarRows: QueryList<MatToolbarRow>;\n\n  constructor(\n    elementRef: ElementRef,\n    private _platform: Platform,\n    @Inject(DOCUMENT) document?: any) {\n    super(elementRef);\n\n    // TODO: make the document a required param when doing breaking changes.\n    this._document = document;\n  }\n\n  ngAfterViewInit() {\n    if (this._platform.isBrowser) {\n      this._checkToolbarMixedModes();\n      this._toolbarRows.changes.subscribe(() => this._checkToolbarMixedModes());\n    }\n  }\n\n  /**\n   * Throws an exception when developers are attempting to combine the different toolbar row modes.\n   */\n  private _checkToolbarMixedModes() {\n    if (this._toolbarRows.length && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      // Check if there are any other DOM nodes that can display content but aren't inside of\n      // a <mat-toolbar-row> element.\n      const isCombinedUsage = Array.from<HTMLElement>(this._elementRef.nativeElement.childNodes)\n        .filter(node => !(node.classList && node.classList.contains('mat-toolbar-row')))\n        .filter(node => node.nodeType !== (this._document ? this._document.COMMENT_NODE : 8))\n        .some(node => !!(node.textContent && node.textContent.trim()));\n\n      if (isCombinedUsage) {\n        throwToolbarMixedModesError();\n      }\n    }\n  }\n}\n\n/**\n * Throws an exception when attempting to combine the different toolbar row modes.\n * @docs-private\n */\nexport function throwToolbarMixedModesError() {\n  throw Error('MatToolbar: Attempting to combine different toolbar modes. ' +\n    'Either specify multiple `<mat-toolbar-row>` elements explicitly or just place content ' +\n    'inside of a `<mat-toolbar>` for a single row.');\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgModule} from '@angular/core';\nimport {MatCommonModule} from '@angular/material/core';\nimport {MatToolbar, MatToolbarRow} from './toolbar';\n\n\n@NgModule({\n  imports: [MatCommonModule],\n  exports: [MatToolbar, MatToolbarRow, MatCommonModule],\n  declarations: [MatToolbar, MatToolbarRow],\n})\nexport class MatToolbarModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './toolbar-module';\nexport * from './toolbar';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","import { Subscriber } from '../Subscriber';\nexport function distinctUntilChanged(compare, keySelector) {\n    return (source) => source.lift(new DistinctUntilChangedOperator(compare, keySelector));\n}\nclass DistinctUntilChangedOperator {\n    constructor(compare, keySelector) {\n        this.compare = compare;\n        this.keySelector = keySelector;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new DistinctUntilChangedSubscriber(subscriber, this.compare, this.keySelector));\n    }\n}\nclass DistinctUntilChangedSubscriber extends Subscriber {\n    constructor(destination, compare, keySelector) {\n        super(destination);\n        this.keySelector = keySelector;\n        this.hasKey = false;\n        if (typeof compare === 'function') {\n            this.compare = compare;\n        }\n    }\n    compare(x, y) {\n        return x === y;\n    }\n    _next(value) {\n        let key;\n        try {\n            const { keySelector } = this;\n            key = keySelector ? keySelector(value) : value;\n        }\n        catch (err) {\n            return this.destination.error(err);\n        }\n        let result = false;\n        if (this.hasKey) {\n            try {\n                const { compare } = this;\n                result = compare(this.key, key);\n            }\n            catch (err) {\n                return this.destination.error(err);\n            }\n        }\n        else {\n            this.hasKey = true;\n        }\n        if (!result) {\n            this.key = key;\n            this.destination.next(value);\n        }\n    }\n}\n//# sourceMappingURL=distinctUntilChanged.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar timestamp_1 = require(\"../../operator/timestamp\");\nrxjs_1.Observable.prototype.timestamp = timestamp_1.timestamp;\n//# sourceMappingURL=timestamp.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\n/* tslint:enable:max-line-length */\n/**\n * Creates an output Observable which concurrently emits all values from every\n * given input Observable.\n *\n * <span class=\"informal\">Flattens multiple Observables together by blending\n * their values into one Observable.</span>\n *\n * <img src=\"./img/merge.png\" width=\"100%\">\n *\n * `merge` subscribes to each given input Observable (either the source or an\n * Observable given as argument), and simply forwards (without doing any\n * transformation) all the values from all the input Observables to the output\n * Observable. The output Observable only completes once all input Observables\n * have completed. Any error delivered by an input Observable will be immediately\n * emitted on the output Observable.\n *\n * @example <caption>Merge together two Observables: 1s interval and clicks</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var timer = Rx.Observable.interval(1000);\n * var clicksOrTimer = clicks.merge(timer);\n * clicksOrTimer.subscribe(x => console.log(x));\n *\n * @example <caption>Merge together 3 Observables, but only 2 run concurrently</caption>\n * var timer1 = Rx.Observable.interval(1000).take(10);\n * var timer2 = Rx.Observable.interval(2000).take(6);\n * var timer3 = Rx.Observable.interval(500).take(10);\n * var concurrent = 2; // the argument\n * var merged = timer1.merge(timer2, timer3, concurrent);\n * merged.subscribe(x => console.log(x));\n *\n * @see {@link mergeAll}\n * @see {@link mergeMap}\n * @see {@link mergeMapTo}\n * @see {@link mergeScan}\n *\n * @param {ObservableInput} other An input Observable to merge with the source\n * Observable. More than one input Observables may be given as argument.\n * @param {number} [concurrent=Number.POSITIVE_INFINITY] Maximum number of input\n * Observables being subscribed to concurrently.\n * @param {Scheduler} [scheduler=null] The IScheduler to use for managing\n * concurrency of input Observables.\n * @return {Observable} An Observable that emits items that are the result of\n * every input Observable.\n * @method merge\n * @owner Observable\n */\nfunction merge() {\n    var observables = [];\n    for (var _i = 0; _i < arguments.length; _i++) {\n        observables[_i] = arguments[_i];\n    }\n    return this.lift.call(rxjs_1.merge.apply(void 0, [this].concat(observables)));\n}\nexports.merge = merge;\n//# sourceMappingURL=merge.js.map","import { SimpleOuterSubscriber, innerSubscribe, SimpleInnerSubscriber } from '../innerSubscribe';\nexport function distinct(keySelector, flushes) {\n    return (source) => source.lift(new DistinctOperator(keySelector, flushes));\n}\nclass DistinctOperator {\n    constructor(keySelector, flushes) {\n        this.keySelector = keySelector;\n        this.flushes = flushes;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new DistinctSubscriber(subscriber, this.keySelector, this.flushes));\n    }\n}\nexport class DistinctSubscriber extends SimpleOuterSubscriber {\n    constructor(destination, keySelector, flushes) {\n        super(destination);\n        this.keySelector = keySelector;\n        this.values = new Set();\n        if (flushes) {\n            this.add(innerSubscribe(flushes, new SimpleInnerSubscriber(this)));\n        }\n    }\n    notifyNext() {\n        this.values.clear();\n    }\n    notifyError(error) {\n        this._error(error);\n    }\n    _next(value) {\n        if (this.keySelector) {\n            this._useKeySelector(value);\n        }\n        else {\n            this._finalizeNext(value, value);\n        }\n    }\n    _useKeySelector(value) {\n        let key;\n        const { destination } = this;\n        try {\n            key = this.keySelector(value);\n        }\n        catch (err) {\n            destination.error(err);\n            return;\n        }\n        this._finalizeNext(key, value);\n    }\n    _finalizeNext(key, value) {\n        const { values } = this;\n        if (!values.has(key)) {\n            values.add(key);\n            this.destination.next(value);\n        }\n    }\n}\n//# sourceMappingURL=distinct.js.map","import { Observable } from '../Observable';\nimport { isArray } from '../util/isArray';\nimport { isFunction } from '../util/isFunction';\nimport { map } from '../operators/map';\nexport function fromEventPattern(addHandler, removeHandler, resultSelector) {\n    if (resultSelector) {\n        return fromEventPattern(addHandler, removeHandler).pipe(map(args => isArray(args) ? resultSelector(...args) : resultSelector(args)));\n    }\n    return new Observable(subscriber => {\n        const handler = (...e) => subscriber.next(e.length === 1 ? e[0] : e);\n        let retValue;\n        try {\n            retValue = addHandler(handler);\n        }\n        catch (err) {\n            subscriber.error(err);\n            return undefined;\n        }\n        if (!isFunction(removeHandler)) {\n            return undefined;\n        }\n        return () => removeHandler(handler, retValue);\n    });\n}\n//# sourceMappingURL=fromEventPattern.js.map","import { ReplaySubject } from '../ReplaySubject';\nimport { multicast } from './multicast';\nexport function publishReplay(bufferSize, windowTime, selectorOrScheduler, scheduler) {\n    if (selectorOrScheduler && typeof selectorOrScheduler !== 'function') {\n        scheduler = selectorOrScheduler;\n    }\n    const selector = typeof selectorOrScheduler === 'function' ? selectorOrScheduler : undefined;\n    const subject = new ReplaySubject(bufferSize, windowTime, scheduler);\n    return (source) => multicast(() => subject, selector)(source);\n}\n//# sourceMappingURL=publishReplay.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Observable} from 'rxjs';\nimport {CollectionViewer} from './collection-viewer';\n\nexport abstract class DataSource<T> {\n  /**\n   * Connects a collection viewer (such as a data-table) to this data source. Note that\n   * the stream provided will be accessed during change detection and should not directly change\n   * values that are bound in template views.\n   * @param collectionViewer The component that exposes a view over the data provided by this\n   *     data source.\n   * @returns Observable that emits a new value when the data changes.\n   */\n  abstract connect(collectionViewer: CollectionViewer): Observable<T[] | ReadonlyArray<T>>;\n\n  /**\n   * Disconnects a collection viewer (such as a data-table) from this data source. Can be used\n   * to perform any clean-up or tear-down operations when a view is being destroyed.\n   *\n   * @param collectionViewer The component that exposes a view over the data provided by this\n   *     data source.\n   */\n  abstract disconnect(collectionViewer: CollectionViewer): void;\n}\n\n/** Checks whether an object is a data source. */\nexport function isDataSource(value: any): value is DataSource<any> {\n  // Check if the value is a DataSource by observing if it has a connect function. Cannot\n  // be checked as an `instanceof DataSource` since people could create their own sources\n  // that match the interface, but don't extend DataSource.\n  return value && typeof value.connect === 'function';\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Observable, isObservable, of as observableOf} from 'rxjs';\nimport {DataSource} from './data-source';\n\n\n/** DataSource wrapper for a native array. */\nexport class ArrayDataSource<T> extends DataSource<T> {\n  constructor(private _data: T[] | ReadonlyArray<T> | Observable<T[] | ReadonlyArray<T>>) {\n    super();\n  }\n\n  connect(): Observable<T[] | ReadonlyArray<T>> {\n    return isObservable(this._data) ? this._data : observableOf(this._data);\n  }\n\n  disconnect() {}\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Observable} from 'rxjs';\n\n\n/** Represents a range of numbers with a specified start and end. */\nexport type ListRange = {start: number, end: number};\n\n\n/**\n * Interface for any component that provides a view of some data collection and wants to provide\n * information regarding the view and any changes made.\n */\nexport interface CollectionViewer {\n  /**\n   * A stream that emits whenever the `CollectionViewer` starts looking at a new portion of the\n   * data. The `start` index is inclusive, while the `end` is exclusive.\n   */\n  viewChange: Observable<ListRange>;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  EmbeddedViewRef,\n  IterableChangeRecord,\n  IterableChanges,\n  ViewContainerRef\n} from '@angular/core';\nimport {\n  _ViewRepeater,\n  _ViewRepeaterItemChanged,\n  _ViewRepeaterItemContext,\n  _ViewRepeaterItemContextFactory,\n  _ViewRepeaterItemValueResolver,\n  _ViewRepeaterOperation\n} from './view-repeater';\n\n/**\n * A repeater that destroys views when they are removed from a\n * {@link ViewContainerRef}. When new items are inserted into the container,\n * the repeater will always construct a new embedded view for each item.\n *\n * @template T The type for the embedded view's $implicit property.\n * @template R The type for the item in each IterableDiffer change record.\n * @template C The type for the context passed to each embedded view.\n */\nexport class _DisposeViewRepeaterStrategy<T, R, C extends _ViewRepeaterItemContext<T>>\n    implements _ViewRepeater<T, R, C> {\n  applyChanges(changes: IterableChanges<R>,\n               viewContainerRef: ViewContainerRef,\n               itemContextFactory: _ViewRepeaterItemContextFactory<T, R, C>,\n               itemValueResolver: _ViewRepeaterItemValueResolver<T, R>,\n               itemViewChanged?: _ViewRepeaterItemChanged<R, C>) {\n    changes.forEachOperation(\n        (record: IterableChangeRecord<R>,\n         adjustedPreviousIndex: number | null,\n         currentIndex: number | null) => {\n          let view: EmbeddedViewRef<C> | undefined;\n          let operation: _ViewRepeaterOperation;\n          if (record.previousIndex == null) {\n            const insertContext = itemContextFactory(record, adjustedPreviousIndex, currentIndex);\n            view = viewContainerRef.createEmbeddedView(\n                insertContext.templateRef, insertContext.context, insertContext.index);\n            operation = _ViewRepeaterOperation.INSERTED;\n          } else if (currentIndex == null) {\n            viewContainerRef.remove(adjustedPreviousIndex!);\n            operation = _ViewRepeaterOperation.REMOVED;\n          } else {\n            view = viewContainerRef.get(adjustedPreviousIndex!) as EmbeddedViewRef<C>;\n            viewContainerRef.move(view!, currentIndex);\n            operation = _ViewRepeaterOperation.MOVED;\n          }\n\n          if (itemViewChanged) {\n            itemViewChanged({\n              context: view?.context,\n              operation,\n              record,\n            });\n          }\n        });\n  }\n\n  detach() {\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  EmbeddedViewRef,\n  IterableChangeRecord,\n  IterableChanges,\n  ViewContainerRef\n} from '@angular/core';\nimport {\n  _ViewRepeater,\n  _ViewRepeaterItemChanged,\n  _ViewRepeaterItemContext,\n  _ViewRepeaterItemContextFactory,\n  _ViewRepeaterItemInsertArgs,\n  _ViewRepeaterItemValueResolver,\n  _ViewRepeaterOperation\n} from './view-repeater';\n\n\n/**\n * A repeater that caches views when they are removed from a\n * {@link ViewContainerRef}. When new items are inserted into the container,\n * the repeater will reuse one of the cached views instead of creating a new\n * embedded view. Recycling cached views reduces the quantity of expensive DOM\n * inserts.\n *\n * @template T The type for the embedded view's $implicit property.\n * @template R The type for the item in each IterableDiffer change record.\n * @template C The type for the context passed to each embedded view.\n */\nexport class _RecycleViewRepeaterStrategy<T, R, C extends _ViewRepeaterItemContext<T>>\n    implements _ViewRepeater<T, R, C> {\n  /**\n   * The size of the cache used to store unused views.\n   * Setting the cache size to `0` will disable caching. Defaults to 20 views.\n   */\n  viewCacheSize: number = 20;\n\n  /**\n   * View cache that stores embedded view instances that have been previously stamped out,\n   * but don't are not currently rendered. The view repeater will reuse these views rather than\n   * creating brand new ones.\n   *\n   * TODO(michaeljamesparsons) Investigate whether using a linked list would improve performance.\n   */\n  private _viewCache: EmbeddedViewRef<C>[] = [];\n\n  /** Apply changes to the DOM. */\n  applyChanges(changes: IterableChanges<R>,\n               viewContainerRef: ViewContainerRef,\n               itemContextFactory: _ViewRepeaterItemContextFactory<T, R, C>,\n               itemValueResolver: _ViewRepeaterItemValueResolver<T, R>,\n               itemViewChanged?: _ViewRepeaterItemChanged<R, C>) {\n    // Rearrange the views to put them in the right location.\n    changes.forEachOperation((record: IterableChangeRecord<R>,\n                              adjustedPreviousIndex: number | null,\n                              currentIndex: number | null) => {\n      let view: EmbeddedViewRef<C> | undefined;\n      let operation: _ViewRepeaterOperation;\n      if (record.previousIndex == null) {  // Item added.\n        const viewArgsFactory = () => itemContextFactory(\n            record, adjustedPreviousIndex, currentIndex);\n        view = this._insertView(viewArgsFactory, currentIndex!, viewContainerRef,\n            itemValueResolver(record));\n        operation = view ? _ViewRepeaterOperation.INSERTED : _ViewRepeaterOperation.REPLACED;\n      } else if (currentIndex == null) {  // Item removed.\n        this._detachAndCacheView(adjustedPreviousIndex!, viewContainerRef);\n        operation = _ViewRepeaterOperation.REMOVED;\n      } else {  // Item moved.\n        view = this._moveView(adjustedPreviousIndex!, currentIndex!, viewContainerRef,\n            itemValueResolver(record));\n        operation = _ViewRepeaterOperation.MOVED;\n      }\n\n      if (itemViewChanged) {\n        itemViewChanged({\n          context: view?.context,\n          operation,\n          record,\n        });\n      }\n    });\n  }\n\n  detach() {\n    for (const view of this._viewCache) {\n      view.destroy();\n    }\n  }\n\n  /**\n   * Inserts a view for a new item, either from the cache or by creating a new\n   * one. Returns `undefined` if the item was inserted into a cached view.\n   */\n  private _insertView(viewArgsFactory: () => _ViewRepeaterItemInsertArgs<C>, currentIndex: number,\n                      viewContainerRef: ViewContainerRef,\n                      value: T): EmbeddedViewRef<C> | undefined {\n    let cachedView = this._insertViewFromCache(currentIndex!, viewContainerRef);\n    if (cachedView) {\n      cachedView.context.$implicit = value;\n      return undefined;\n    }\n\n    const viewArgs = viewArgsFactory();\n    return viewContainerRef.createEmbeddedView(\n        viewArgs.templateRef, viewArgs.context, viewArgs.index);\n  }\n\n  /** Detaches the view at the given index and inserts into the view cache. */\n  private _detachAndCacheView(index: number, viewContainerRef: ViewContainerRef) {\n    const detachedView = this._detachView(index, viewContainerRef);\n    this._maybeCacheView(detachedView, viewContainerRef);\n  }\n\n  /** Moves view at the previous index to the current index. */\n  private _moveView(adjustedPreviousIndex: number, currentIndex: number,\n                    viewContainerRef: ViewContainerRef, value: T): EmbeddedViewRef<C> {\n    const view = viewContainerRef.get(adjustedPreviousIndex!) as\n        EmbeddedViewRef<C>;\n    viewContainerRef.move(view, currentIndex);\n    view.context.$implicit = value;\n    return view;\n  }\n\n  /**\n   * Cache the given detached view. If the cache is full, the view will be\n   * destroyed.\n   */\n  private _maybeCacheView(view: EmbeddedViewRef<C>, viewContainerRef: ViewContainerRef) {\n    if (this._viewCache.length < this.viewCacheSize) {\n      this._viewCache.push(view);\n    } else {\n      const index = viewContainerRef.indexOf(view);\n\n      // The host component could remove views from the container outside of\n      // the view repeater. It's unlikely this will occur, but just in case,\n      // destroy the view on its own, otherwise destroy it through the\n      // container to ensure that all the references are removed.\n      if (index === -1) {\n        view.destroy();\n      } else {\n        viewContainerRef.remove(index);\n      }\n    }\n  }\n\n  /** Inserts a recycled view from the cache at the given index. */\n  private _insertViewFromCache(index: number,\n                               viewContainerRef: ViewContainerRef): EmbeddedViewRef<C> | null {\n    const cachedView = this._viewCache.pop();\n    if (cachedView) {\n      viewContainerRef.insert(cachedView, index);\n    }\n    return cachedView || null;\n  }\n\n  /** Detaches the embedded view at the given index. */\n  private _detachView(index: number, viewContainerRef: ViewContainerRef): EmbeddedViewRef<C> {\n    return viewContainerRef.detach(index) as EmbeddedViewRef<C>;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Subject} from 'rxjs';\n\n/**\n * Class to be used to power selecting one or more options from a list.\n */\nexport class SelectionModel<T> {\n  /** Currently-selected values. */\n  private _selection = new Set<T>();\n\n  /** Keeps track of the deselected options that haven't been emitted by the change event. */\n  private _deselectedToEmit: T[] = [];\n\n  /** Keeps track of the selected options that haven't been emitted by the change event. */\n  private _selectedToEmit: T[] = [];\n\n  /** Cache for the array value of the selected items. */\n  private _selected: T[] | null;\n\n  /** Selected values. */\n  get selected(): T[] {\n    if (!this._selected) {\n      this._selected = Array.from(this._selection.values());\n    }\n\n    return this._selected;\n  }\n\n  /** Event emitted when the value has changed. */\n  changed: Subject<SelectionChange<T>> = new Subject();\n\n  constructor(\n    private _multiple = false,\n    initiallySelectedValues?: T[],\n    private _emitChanges = true) {\n\n    if (initiallySelectedValues && initiallySelectedValues.length) {\n      if (_multiple) {\n        initiallySelectedValues.forEach(value => this._markSelected(value));\n      } else {\n        this._markSelected(initiallySelectedValues[0]);\n      }\n\n      // Clear the array in order to avoid firing the change event for preselected values.\n      this._selectedToEmit.length = 0;\n    }\n  }\n\n  /**\n   * Selects a value or an array of values.\n   */\n  select(...values: T[]): void {\n    this._verifyValueAssignment(values);\n    values.forEach(value => this._markSelected(value));\n    this._emitChangeEvent();\n  }\n\n  /**\n   * Deselects a value or an array of values.\n   */\n  deselect(...values: T[]): void {\n    this._verifyValueAssignment(values);\n    values.forEach(value => this._unmarkSelected(value));\n    this._emitChangeEvent();\n  }\n\n  /**\n   * Toggles a value between selected and deselected.\n   */\n  toggle(value: T): void {\n    this.isSelected(value) ? this.deselect(value) : this.select(value);\n  }\n\n  /**\n   * Clears all of the selected values.\n   */\n  clear(): void {\n    this._unmarkAll();\n    this._emitChangeEvent();\n  }\n\n  /**\n   * Determines whether a value is selected.\n   */\n  isSelected(value: T): boolean {\n    return this._selection.has(value);\n  }\n\n  /**\n   * Determines whether the model does not have a value.\n   */\n  isEmpty(): boolean {\n    return this._selection.size === 0;\n  }\n\n  /**\n   * Determines whether the model has a value.\n   */\n  hasValue(): boolean {\n    return !this.isEmpty();\n  }\n\n  /**\n   * Sorts the selected values based on a predicate function.\n   */\n  sort(predicate?: (a: T, b: T) => number): void {\n    if (this._multiple && this.selected) {\n      this._selected!.sort(predicate);\n    }\n  }\n\n  /**\n   * Gets whether multiple values can be selected.\n   */\n  isMultipleSelection() {\n    return this._multiple;\n  }\n\n  /** Emits a change event and clears the records of selected and deselected values. */\n  private _emitChangeEvent() {\n    // Clear the selected values so they can be re-cached.\n    this._selected = null;\n\n    if (this._selectedToEmit.length || this._deselectedToEmit.length) {\n      this.changed.next({\n        source: this,\n        added: this._selectedToEmit,\n        removed: this._deselectedToEmit\n      });\n\n      this._deselectedToEmit = [];\n      this._selectedToEmit = [];\n    }\n  }\n\n  /** Selects a value. */\n  private _markSelected(value: T) {\n    if (!this.isSelected(value)) {\n      if (!this._multiple) {\n        this._unmarkAll();\n      }\n\n      this._selection.add(value);\n\n      if (this._emitChanges) {\n        this._selectedToEmit.push(value);\n      }\n    }\n  }\n\n  /** Deselects a value. */\n  private _unmarkSelected(value: T) {\n    if (this.isSelected(value)) {\n      this._selection.delete(value);\n\n      if (this._emitChanges) {\n        this._deselectedToEmit.push(value);\n      }\n    }\n  }\n\n  /** Clears out the selected values. */\n  private _unmarkAll() {\n    if (!this.isEmpty()) {\n      this._selection.forEach(value => this._unmarkSelected(value));\n    }\n  }\n\n  /**\n   * Verifies the value assignment and throws an error if the specified value array is\n   * including multiple values while the selection model is not supporting multiple values.\n   */\n  private _verifyValueAssignment(values: T[]) {\n    if (values.length > 1 && !this._multiple && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw getMultipleValuesInSingleSelectionError();\n    }\n  }\n}\n\n/**\n * Event emitted when the value of a MatSelectionModel has changed.\n * @docs-private\n */\nexport interface SelectionChange<T> {\n  /** Model that dispatched the event. */\n  source: SelectionModel<T>;\n  /** Options that were added to the model. */\n  added: T[];\n  /** Options that were removed from the model. */\n  removed: T[];\n}\n\n/**\n * Returns an error that reports that multiple values are passed into a selection model\n * with a single value.\n * @docs-private\n */\nexport function getMultipleValuesInSingleSelectionError() {\n  return Error('Cannot pass multiple values into SelectionModel with single-value mode.');\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable, OnDestroy} from '@angular/core';\n\n\n// Users of the Dispatcher never need to see this type, but TypeScript requires it to be exported.\nexport type UniqueSelectionDispatcherListener = (id: string, name: string) => void;\n\n/**\n * Class to coordinate unique selection based on name.\n * Intended to be consumed as an Angular service.\n * This service is needed because native radio change events are only fired on the item currently\n * being selected, and we still need to uncheck the previous selection.\n *\n * This service does not *store* any IDs and names because they may change at any time, so it is\n * less error-prone if they are simply passed through when the events occur.\n */\n@Injectable({providedIn: 'root'})\nexport class UniqueSelectionDispatcher implements OnDestroy {\n  private _listeners: UniqueSelectionDispatcherListener[] = [];\n\n  /**\n   * Notify other items that selection for the given name has been set.\n   * @param id ID of the item.\n   * @param name Name of the item.\n   */\n  notify(id: string, name: string) {\n    for (let listener of this._listeners) {\n      listener(id, name);\n    }\n  }\n\n  /**\n   * Listen for future changes to item selection.\n   * @return Function used to deregister listener\n   */\n  listen(listener: UniqueSelectionDispatcherListener): () => void {\n    this._listeners.push(listener);\n    return () => {\n      this._listeners = this._listeners.filter((registered: UniqueSelectionDispatcherListener) => {\n        return listener !== registered;\n      });\n    };\n  }\n\n  ngOnDestroy() {\n    this._listeners = [];\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {SelectionModel} from './selection-model';\n\n\n/**\n * Interface for a class that can flatten hierarchical structured data and re-expand the flattened\n * data back into its original structure. Should be used in conjunction with the cdk-tree.\n */\nexport interface TreeDataNodeFlattener<T> {\n  /** Transforms a set of hierarchical structured data into a flattened data array. */\n  flattenNodes(structuredData: any[]): T[];\n\n  /**\n   * Expands a flattened array of data into its hierarchical form using the provided expansion\n   * model.\n   */\n  expandFlattenedNodes(nodes: T[], expansionModel: SelectionModel<T>): T[];\n\n  /**\n   * Put node descendants of node in array.\n   * If `onlyExpandable` is true, then only process expandable descendants.\n   */\n  nodeDescendents(node: T, nodes: T[], onlyExpandable: boolean): void;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  InjectionToken,\n  IterableChangeRecord,\n  IterableChanges,\n  TemplateRef,\n  ViewContainerRef\n} from '@angular/core';\n\n/**\n * The context for an embedded view in the repeater's view container.\n *\n * @template T The type for the embedded view's $implicit property.\n */\nexport interface _ViewRepeaterItemContext<T> {\n  $implicit?: T;\n}\n\n/**\n * The arguments needed to construct an embedded view for an item in a view\n * container.\n *\n * @template C The type for the context passed to each embedded view.\n */\nexport interface _ViewRepeaterItemInsertArgs<C> {\n  templateRef: TemplateRef<C>;\n  context?: C;\n  index?: number;\n}\n\n/**\n * A factory that derives the embedded view context for an item in a view\n * container.\n *\n * @template T The type for the embedded view's $implicit property.\n * @template R The type for the item in each IterableDiffer change record.\n * @template C The type for the context passed to each embedded view.\n */\nexport type _ViewRepeaterItemContextFactory<T, R, C extends _ViewRepeaterItemContext<T>> =\n    (record: IterableChangeRecord<R>,\n     adjustedPreviousIndex: number | null,\n     currentIndex: number | null) => _ViewRepeaterItemInsertArgs<C>;\n\n/**\n * Extracts the value of an item from an {@link IterableChangeRecord}.\n *\n * @template T The type for the embedded view's $implicit property.\n * @template R The type for the item in each IterableDiffer change record.\n */\nexport type _ViewRepeaterItemValueResolver<T, R> =\n    (record: IterableChangeRecord<R>) => T;\n\n/** Indicates how a view was changed by a {@link _ViewRepeater}. */\nexport const enum _ViewRepeaterOperation {\n  /** The content of an existing view was replaced with another item. */\n  REPLACED,\n  /** A new view was created with `createEmbeddedView`. */\n  INSERTED,\n  /** The position of a view changed, but the content remains the same. */\n  MOVED,\n  /** A view was detached from the view container. */\n  REMOVED,\n}\n\n/**\n * Meta data describing the state of a view after it was updated by a\n * {@link _ViewRepeater}.\n *\n * @template R The type for the item in each IterableDiffer change record.\n * @template C The type for the context passed to each embedded view.\n */\nexport interface _ViewRepeaterItemChange<R, C> {\n  /** The view's context after it was changed. */\n  context?: C;\n  /** Indicates how the view was changed. */\n  operation: _ViewRepeaterOperation;\n  /** The view's corresponding change record. */\n  record: IterableChangeRecord<R>;\n}\n\n/**\n * Type for a callback to be executed after a view has changed.\n *\n * @template R The type for the item in each IterableDiffer change record.\n * @template C The type for the context passed to each embedded view.\n */\nexport type _ViewRepeaterItemChanged<R, C> =\n    (change: _ViewRepeaterItemChange<R, C>) => void;\n\n/**\n * Describes a strategy for rendering items in a {@link ViewContainerRef}.\n *\n * @template T The type for the embedded view's $implicit property.\n * @template R The type for the item in each IterableDiffer change record.\n * @template C The type for the context passed to each embedded view.\n */\nexport interface _ViewRepeater<T, R, C extends _ViewRepeaterItemContext<T>> {\n  applyChanges(\n      changes: IterableChanges<R>,\n      viewContainerRef: ViewContainerRef,\n      itemContextFactory: _ViewRepeaterItemContextFactory<T, R, C>,\n      itemValueResolver: _ViewRepeaterItemValueResolver<T, R>,\n      itemViewChanged?: _ViewRepeaterItemChanged<R, C>): void;\n\n  detach(): void;\n}\n\n/**\n * Injection token for {@link _ViewRepeater}.\n *\n * INTERNAL ONLY - not for public consumption.\n * @docs-private\n */\nexport const _VIEW_REPEATER_STRATEGY = new InjectionToken<\n        _ViewRepeater<unknown, unknown, _ViewRepeaterItemContext<unknown>>>('_ViewRepeater');\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './array-data-source';\nexport * from './collection-viewer';\nexport * from './data-source';\nexport * from './dispose-view-repeater-strategy';\nexport * from './recycle-view-repeater-strategy';\nexport * from './selection-model';\nexport {\n  UniqueSelectionDispatcher,\n  UniqueSelectionDispatcherListener,\n} from './unique-selection-dispatcher';\nexport * from './tree-adapter';\nexport * from './view-repeater';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","import { mergeAll } from './mergeAll';\nexport function concatAll() {\n    return mergeAll(1);\n}\n//# sourceMappingURL=concatAll.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ViewContainerRef, ComponentFactoryResolver} from '@angular/core';\nimport {Direction} from '@angular/cdk/bidi';\nimport {ScrollStrategy} from '@angular/cdk/overlay';\n\n/** Valid ARIA roles for a dialog element. */\nexport type DialogRole = 'dialog' | 'alertdialog';\n\n/** Possible overrides for a dialog's position. */\nexport interface DialogPosition {\n  /** Override for the dialog's top position. */\n  top?: string;\n\n  /** Override for the dialog's bottom position. */\n  bottom?: string;\n\n  /** Override for the dialog's left position. */\n  left?: string;\n\n  /** Override for the dialog's right position. */\n  right?: string;\n}\n\n/**\n * Configuration for opening a modal dialog with the MatDialog service.\n */\nexport class MatDialogConfig<D = any> {\n\n  /**\n   * Where the attached component should live in Angular's *logical* component tree.\n   * This affects what is available for injection and the change detection order for the\n   * component instantiated inside of the dialog. This does not affect where the dialog\n   * content will be rendered.\n   */\n  viewContainerRef?: ViewContainerRef;\n\n  /** ID for the dialog. If omitted, a unique one will be generated. */\n  id?: string;\n\n  /** The ARIA role of the dialog element. */\n  role?: DialogRole = 'dialog';\n\n  /** Custom class for the overlay pane. */\n  panelClass?: string | string[] = '';\n\n  /** Whether the dialog has a backdrop. */\n  hasBackdrop?: boolean = true;\n\n  /** Custom class for the backdrop. */\n  backdropClass?: string | string[] = '';\n\n  /** Whether the user can use escape or clicking on the backdrop to close the modal. */\n  disableClose?: boolean = false;\n\n  /** Width of the dialog. */\n  width?: string = '';\n\n  /** Height of the dialog. */\n  height?: string = '';\n\n  /** Min-width of the dialog. If a number is provided, assumes pixel units. */\n  minWidth?: number | string;\n\n  /** Min-height of the dialog. If a number is provided, assumes pixel units. */\n  minHeight?: number | string;\n\n  /** Max-width of the dialog. If a number is provided, assumes pixel units. Defaults to 80vw. */\n  maxWidth?: number | string = '80vw';\n\n  /** Max-height of the dialog. If a number is provided, assumes pixel units. */\n  maxHeight?: number | string;\n\n  /** Position overrides. */\n  position?: DialogPosition;\n\n  /** Data being injected into the child component. */\n  data?: D | null = null;\n\n  /** Layout direction for the dialog's content. */\n  direction?: Direction;\n\n  /** ID of the element that describes the dialog. */\n  ariaDescribedBy?: string | null = null;\n\n  /** ID of the element that labels the dialog. */\n  ariaLabelledBy?: string | null = null;\n\n  /** Aria label to assign to the dialog element. */\n  ariaLabel?: string | null = null;\n\n  /** Whether the dialog should focus the first focusable element on open. */\n  autoFocus?: boolean = true;\n\n  /**\n   * Whether the dialog should restore focus to the\n   * previously-focused element, after it's closed.\n   */\n  restoreFocus?: boolean = true;\n\n  /** Scroll strategy to be used for the dialog. */\n  scrollStrategy?: ScrollStrategy;\n\n  /**\n   * Whether the dialog should close when the user goes backwards/forwards in history.\n   * Note that this usually doesn't include clicking on links (unless the user is using\n   * the `HashLocationStrategy`).\n   */\n  closeOnNavigation?: boolean = true;\n\n  /** Alternate `ComponentFactoryResolver` to use when resolving the associated component. */\n  componentFactoryResolver?: ComponentFactoryResolver;\n\n  // TODO(jelbourn): add configuration for lifecycle hooks, ARIA labelling.\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {\n  animate,\n  state,\n  style,\n  transition,\n  trigger,\n  AnimationTriggerMetadata,\n} from '@angular/animations';\n\n/**\n * Animations used by MatDialog.\n * @docs-private\n */\nexport const matDialogAnimations: {\n  readonly dialogContainer: AnimationTriggerMetadata;\n} = {\n  /** Animation that is applied on the dialog container by defalt. */\n  dialogContainer: trigger('dialogContainer', [\n    // Note: The `enter` animation transitions to `transform: none`, because for some reason\n    // specifying the transform explicitly, causes IE both to blur the dialog content and\n    // decimate the animation performance. Leaving it as `none` solves both issues.\n    state('void, exit', style({opacity: 0, transform: 'scale(0.7)'})),\n    state('enter', style({transform: 'none'})),\n    transition('* => enter', animate('150ms cubic-bezier(0, 0, 0.2, 1)',\n        style({transform: 'none', opacity: 1}))),\n    transition('* => void, * => exit',\n        animate('75ms cubic-bezier(0.4, 0.0, 0.2, 1)', style({opacity: 0}))),\n  ])\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {AnimationEvent} from '@angular/animations';\nimport {FocusMonitor, FocusOrigin, FocusTrap, FocusTrapFactory} from '@angular/cdk/a11y';\nimport {\n  BasePortalOutlet,\n  CdkPortalOutlet,\n  ComponentPortal,\n  DomPortal,\n  TemplatePortal\n} from '@angular/cdk/portal';\nimport {DOCUMENT} from '@angular/common';\nimport {\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ComponentRef,\n  Directive,\n  ElementRef,\n  EmbeddedViewRef,\n  EventEmitter,\n  Inject,\n  Optional,\n  ViewChild,\n  ViewEncapsulation,\n} from '@angular/core';\nimport {matDialogAnimations} from './dialog-animations';\nimport {MatDialogConfig} from './dialog-config';\n\n/** Event that captures the state of dialog container animations. */\ninterface DialogAnimationEvent {\n  state: 'opened' | 'opening' | 'closing' | 'closed';\n  totalTime: number;\n}\n\n/**\n * Throws an exception for the case when a ComponentPortal is\n * attached to a DomPortalOutlet without an origin.\n * @docs-private\n */\nexport function throwMatDialogContentAlreadyAttachedError() {\n  throw Error('Attempting to attach dialog content after content is already attached');\n}\n\n/**\n * Base class for the `MatDialogContainer`. The base class does not implement\n * animations as these are left to implementers of the dialog container.\n */\n@Directive()\nexport abstract class _MatDialogContainerBase extends BasePortalOutlet {\n  protected _document: Document;\n\n  /** The portal outlet inside of this container into which the dialog content will be loaded. */\n  @ViewChild(CdkPortalOutlet, {static: true}) _portalOutlet: CdkPortalOutlet;\n\n  /** The class that traps and manages focus within the dialog. */\n  private _focusTrap: FocusTrap;\n\n  /** Emits when an animation state changes. */\n  _animationStateChanged = new EventEmitter<DialogAnimationEvent>();\n\n  /** Element that was focused before the dialog was opened. Save this to restore upon close. */\n  private _elementFocusedBeforeDialogWasOpened: HTMLElement | null = null;\n\n  /**\n   * Type of interaction that led to the dialog being closed. This is used to determine\n   * whether the focus style will be applied when returning focus to its original location\n   * after the dialog is closed.\n   */\n  _closeInteractionType: FocusOrigin|null = null;\n\n  /** ID of the element that should be considered as the dialog's label. */\n  _ariaLabelledBy: string | null;\n\n  /** ID for the container DOM element. */\n  _id: string;\n\n  constructor(\n    protected _elementRef: ElementRef,\n    protected _focusTrapFactory: FocusTrapFactory,\n    protected _changeDetectorRef: ChangeDetectorRef,\n    @Optional() @Inject(DOCUMENT) _document: any,\n    /** The dialog configuration. */\n    public _config: MatDialogConfig,\n    private _focusMonitor?: FocusMonitor) {\n\n    super();\n    this._ariaLabelledBy = _config.ariaLabelledBy || null;\n    this._document = _document;\n  }\n\n  /** Starts the dialog exit animation. */\n  abstract _startExitAnimation(): void;\n\n  /** Initializes the dialog container with the attached content. */\n  _initializeWithAttachedContent() {\n    this._setupFocusTrap();\n    // Save the previously focused element. This element will be re-focused\n    // when the dialog closes.\n    this._capturePreviouslyFocusedElement();\n    // Move focus onto the dialog immediately in order to prevent the user\n    // from accidentally opening multiple dialogs at the same time.\n    this._focusDialogContainer();\n  }\n\n  /**\n   * Attach a ComponentPortal as content to this dialog container.\n   * @param portal Portal to be attached as the dialog content.\n   */\n  attachComponentPortal<T>(portal: ComponentPortal<T>): ComponentRef<T> {\n    if (this._portalOutlet.hasAttached() && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throwMatDialogContentAlreadyAttachedError();\n    }\n\n    return this._portalOutlet.attachComponentPortal(portal);\n  }\n\n  /**\n   * Attach a TemplatePortal as content to this dialog container.\n   * @param portal Portal to be attached as the dialog content.\n   */\n  attachTemplatePortal<C>(portal: TemplatePortal<C>): EmbeddedViewRef<C> {\n    if (this._portalOutlet.hasAttached() && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throwMatDialogContentAlreadyAttachedError();\n    }\n\n    return this._portalOutlet.attachTemplatePortal(portal);\n  }\n\n  /**\n   * Attaches a DOM portal to the dialog container.\n   * @param portal Portal to be attached.\n   * @deprecated To be turned into a method.\n   * @breaking-change 10.0.0\n   */\n  attachDomPortal = (portal: DomPortal) => {\n    if (this._portalOutlet.hasAttached() && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throwMatDialogContentAlreadyAttachedError();\n    }\n\n    return this._portalOutlet.attachDomPortal(portal);\n  }\n\n  /** Moves focus back into the dialog if it was moved out. */\n  _recaptureFocus() {\n    if (!this._containsFocus()) {\n      const focusContainer = !this._config.autoFocus || !this._focusTrap.focusInitialElement();\n\n      if (focusContainer) {\n        this._elementRef.nativeElement.focus();\n      }\n    }\n  }\n\n  /** Moves the focus inside the focus trap. */\n  protected _trapFocus() {\n    // If we were to attempt to focus immediately, then the content of the dialog would not yet be\n    // ready in instances where change detection has to run first. To deal with this, we simply\n    // wait for the microtask queue to be empty.\n    if (this._config.autoFocus) {\n      this._focusTrap.focusInitialElementWhenReady();\n    } else if (!this._containsFocus()) {\n      // Otherwise ensure that focus is on the dialog container. It's possible that a different\n      // component tried to move focus while the open animation was running. See:\n      // https://github.com/angular/components/issues/16215. Note that we only want to do this\n      // if the focus isn't inside the dialog already, because it's possible that the consumer\n      // turned off `autoFocus` in order to move focus themselves.\n      this._elementRef.nativeElement.focus();\n    }\n  }\n\n  /** Restores focus to the element that was focused before the dialog opened. */\n  protected _restoreFocus() {\n    const previousElement = this._elementFocusedBeforeDialogWasOpened;\n\n    // We need the extra check, because IE can set the `activeElement` to null in some cases.\n    if (this._config.restoreFocus && previousElement &&\n        typeof previousElement.focus === 'function') {\n      const activeElement = this._document.activeElement;\n      const element = this._elementRef.nativeElement;\n\n      // Make sure that focus is still inside the dialog or is on the body (usually because a\n      // non-focusable element like the backdrop was clicked) before moving it. It's possible that\n      // the consumer moved it themselves before the animation was done, in which case we shouldn't\n      // do anything.\n      if (!activeElement || activeElement === this._document.body || activeElement === element ||\n          element.contains(activeElement)) {\n        if (this._focusMonitor) {\n          this._focusMonitor.focusVia(previousElement, this._closeInteractionType);\n          this._closeInteractionType = null;\n        } else {\n          previousElement.focus();\n        }\n      }\n    }\n\n    if (this._focusTrap) {\n      this._focusTrap.destroy();\n    }\n  }\n\n  /** Sets up the focus trap. */\n  private _setupFocusTrap() {\n    this._focusTrap = this._focusTrapFactory.create(this._elementRef.nativeElement);\n  }\n\n  /** Captures the element that was focused before the dialog was opened. */\n  private _capturePreviouslyFocusedElement() {\n    if (this._document) {\n      this._elementFocusedBeforeDialogWasOpened = this._document.activeElement as HTMLElement;\n    }\n  }\n\n  /** Focuses the dialog container. */\n  private _focusDialogContainer() {\n    // Note that there is no focus method when rendering on the server.\n    if (this._elementRef.nativeElement.focus) {\n      this._elementRef.nativeElement.focus();\n    }\n  }\n\n  /** Returns whether focus is inside the dialog. */\n  private _containsFocus() {\n    const element = this._elementRef.nativeElement;\n    const activeElement = this._document.activeElement;\n    return element === activeElement || element.contains(activeElement);\n  }\n}\n\n/**\n * Internal component that wraps user-provided dialog content.\n * Animation is based on https://material.io/guidelines/motion/choreography.html.\n * @docs-private\n */\n@Component({\n  selector: 'mat-dialog-container',\n  templateUrl: 'dialog-container.html',\n  styleUrls: ['dialog.css'],\n  encapsulation: ViewEncapsulation.None,\n  // Using OnPush for dialogs caused some G3 sync issues. Disabled until we can track them down.\n  // tslint:disable-next-line:validate-decorators\n  changeDetection: ChangeDetectionStrategy.Default,\n  animations: [matDialogAnimations.dialogContainer],\n  host: {\n    'class': 'mat-dialog-container',\n    'tabindex': '-1',\n    'aria-modal': 'true',\n    '[id]': '_id',\n    '[attr.role]': '_config.role',\n    '[attr.aria-labelledby]': '_config.ariaLabel ? null : _ariaLabelledBy',\n    '[attr.aria-label]': '_config.ariaLabel',\n    '[attr.aria-describedby]': '_config.ariaDescribedBy || null',\n    '[@dialogContainer]': '_state',\n    '(@dialogContainer.start)': '_onAnimationStart($event)',\n    '(@dialogContainer.done)': '_onAnimationDone($event)',\n  },\n})\nexport class MatDialogContainer extends _MatDialogContainerBase {\n  /** State of the dialog animation. */\n  _state: 'void' | 'enter' | 'exit' = 'enter';\n\n  /** Callback, invoked whenever an animation on the host completes. */\n  _onAnimationDone({toState, totalTime}: AnimationEvent) {\n    if (toState === 'enter') {\n      this._trapFocus();\n      this._animationStateChanged.next({state: 'opened', totalTime});\n    } else if (toState === 'exit') {\n      this._restoreFocus();\n      this._animationStateChanged.next({state: 'closed', totalTime});\n    }\n  }\n\n  /** Callback, invoked when an animation on the host starts. */\n  _onAnimationStart({toState, totalTime}: AnimationEvent) {\n    if (toState === 'enter') {\n      this._animationStateChanged.next({state: 'opening', totalTime});\n    } else if (toState === 'exit' || toState === 'void') {\n      this._animationStateChanged.next({state: 'closing', totalTime});\n    }\n  }\n\n  /** Starts the dialog exit animation. */\n  _startExitAnimation(): void {\n    this._state = 'exit';\n\n    // Mark the container for check so it can react if the\n    // view container is using OnPush change detection.\n    this._changeDetectorRef.markForCheck();\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {FocusOrigin} from '@angular/cdk/a11y';\nimport {ESCAPE, hasModifierKey} from '@angular/cdk/keycodes';\nimport {GlobalPositionStrategy, OverlayRef} from '@angular/cdk/overlay';\nimport {Observable, Subject} from 'rxjs';\nimport {filter, take} from 'rxjs/operators';\nimport {DialogPosition} from './dialog-config';\nimport {_MatDialogContainerBase} from './dialog-container';\n\n\n// TODO(jelbourn): resizing\n\n// Counter for unique dialog ids.\nlet uniqueId = 0;\n\n/** Possible states of the lifecycle of a dialog. */\nexport const enum MatDialogState {OPEN, CLOSING, CLOSED}\n\n/**\n * Reference to a dialog opened via the MatDialog service.\n */\nexport class MatDialogRef<T, R = any> {\n  /** The instance of component opened into the dialog. */\n  componentInstance: T;\n\n  /** Whether the user is allowed to close the dialog. */\n  disableClose: boolean | undefined = this._containerInstance._config.disableClose;\n\n  /** Subject for notifying the user that the dialog has finished opening. */\n  private readonly _afterOpened = new Subject<void>();\n\n  /** Subject for notifying the user that the dialog has finished closing. */\n  private readonly _afterClosed = new Subject<R | undefined>();\n\n  /** Subject for notifying the user that the dialog has started closing. */\n  private readonly _beforeClosed = new Subject<R | undefined>();\n\n  /** Result to be passed to afterClosed. */\n  private _result: R | undefined;\n\n  /** Handle to the timeout that's running as a fallback in case the exit animation doesn't fire. */\n  private _closeFallbackTimeout: number;\n\n  /** Current state of the dialog. */\n  private _state = MatDialogState.OPEN;\n\n  constructor(\n    private _overlayRef: OverlayRef,\n    public _containerInstance: _MatDialogContainerBase,\n    readonly id: string = `mat-dialog-${uniqueId++}`) {\n\n    // Pass the id along to the container.\n    _containerInstance._id = id;\n\n    // Emit when opening animation completes\n    _containerInstance._animationStateChanged.pipe(\n      filter(event => event.state === 'opened'),\n      take(1)\n    )\n    .subscribe(() => {\n      this._afterOpened.next();\n      this._afterOpened.complete();\n    });\n\n    // Dispose overlay when closing animation is complete\n    _containerInstance._animationStateChanged.pipe(\n      filter(event => event.state === 'closed'),\n      take(1)\n    ).subscribe(() => {\n      clearTimeout(this._closeFallbackTimeout);\n      this._finishDialogClose();\n    });\n\n    _overlayRef.detachments().subscribe(() => {\n      this._beforeClosed.next(this._result);\n      this._beforeClosed.complete();\n      this._afterClosed.next(this._result);\n      this._afterClosed.complete();\n      this.componentInstance = null!;\n      this._overlayRef.dispose();\n    });\n\n    _overlayRef.keydownEvents()\n      .pipe(filter(event => {\n        return event.keyCode === ESCAPE && !this.disableClose && !hasModifierKey(event);\n      }))\n      .subscribe(event => {\n        event.preventDefault();\n        _closeDialogVia(this, 'keyboard');\n      });\n\n    _overlayRef.backdropClick().subscribe(() => {\n      if (this.disableClose) {\n        this._containerInstance._recaptureFocus();\n      } else {\n        _closeDialogVia(this, 'mouse');\n      }\n    });\n  }\n\n  /**\n   * Close the dialog.\n   * @param dialogResult Optional result to return to the dialog opener.\n   */\n  close(dialogResult?: R): void {\n    this._result = dialogResult;\n\n    // Transition the backdrop in parallel to the dialog.\n    this._containerInstance._animationStateChanged.pipe(\n      filter(event => event.state === 'closing'),\n      take(1)\n    )\n    .subscribe(event => {\n      this._beforeClosed.next(dialogResult);\n      this._beforeClosed.complete();\n      this._overlayRef.detachBackdrop();\n\n      // The logic that disposes of the overlay depends on the exit animation completing, however\n      // it isn't guaranteed if the parent view is destroyed while it's running. Add a fallback\n      // timeout which will clean everything up if the animation hasn't fired within the specified\n      // amount of time plus 100ms. We don't need to run this outside the NgZone, because for the\n      // vast majority of cases the timeout will have been cleared before it has the chance to fire.\n      this._closeFallbackTimeout = setTimeout(() => this._finishDialogClose(),\n          event.totalTime + 100);\n    });\n\n    this._state = MatDialogState.CLOSING;\n    this._containerInstance._startExitAnimation();\n  }\n\n  /**\n   * Gets an observable that is notified when the dialog is finished opening.\n   */\n  afterOpened(): Observable<void> {\n    return this._afterOpened;\n  }\n\n  /**\n   * Gets an observable that is notified when the dialog is finished closing.\n   */\n  afterClosed(): Observable<R | undefined> {\n    return this._afterClosed;\n  }\n\n  /**\n   * Gets an observable that is notified when the dialog has started closing.\n   */\n  beforeClosed(): Observable<R | undefined> {\n    return this._beforeClosed;\n  }\n\n  /**\n   * Gets an observable that emits when the overlay's backdrop has been clicked.\n   */\n  backdropClick(): Observable<MouseEvent> {\n    return this._overlayRef.backdropClick();\n  }\n\n  /**\n   * Gets an observable that emits when keydown events are targeted on the overlay.\n   */\n  keydownEvents(): Observable<KeyboardEvent> {\n    return this._overlayRef.keydownEvents();\n  }\n\n  /**\n   * Updates the dialog's position.\n   * @param position New dialog position.\n   */\n  updatePosition(position?: DialogPosition): this {\n    let strategy = this._getPositionStrategy();\n\n    if (position && (position.left || position.right)) {\n      position.left ? strategy.left(position.left) : strategy.right(position.right);\n    } else {\n      strategy.centerHorizontally();\n    }\n\n    if (position && (position.top || position.bottom)) {\n      position.top ? strategy.top(position.top) : strategy.bottom(position.bottom);\n    } else {\n      strategy.centerVertically();\n    }\n\n    this._overlayRef.updatePosition();\n\n    return this;\n  }\n\n  /**\n   * Updates the dialog's width and height.\n   * @param width New width of the dialog.\n   * @param height New height of the dialog.\n   */\n  updateSize(width: string = '', height: string = ''): this {\n    this._getPositionStrategy().width(width).height(height);\n    this._overlayRef.updatePosition();\n    return this;\n  }\n\n  /** Add a CSS class or an array of classes to the overlay pane. */\n  addPanelClass(classes: string | string[]): this {\n    this._overlayRef.addPanelClass(classes);\n    return this;\n  }\n\n  /** Remove a CSS class or an array of classes from the overlay pane. */\n  removePanelClass(classes: string | string[]): this {\n    this._overlayRef.removePanelClass(classes);\n    return this;\n  }\n\n  /** Gets the current state of the dialog's lifecycle. */\n  getState(): MatDialogState {\n    return this._state;\n  }\n\n  /**\n   * Finishes the dialog close by updating the state of the dialog\n   * and disposing the overlay.\n   */\n  private _finishDialogClose() {\n    this._state = MatDialogState.CLOSED;\n    this._overlayRef.dispose();\n  }\n\n  /** Fetches the position strategy object from the overlay ref. */\n  private _getPositionStrategy(): GlobalPositionStrategy {\n    return this._overlayRef.getConfig().positionStrategy as GlobalPositionStrategy;\n  }\n}\n\n/**\n * Closes the dialog with the specified interaction type. This is currently not part of\n * `MatDialogRef` as that would conflict with custom dialog ref mocks provided in tests.\n * More details. See: https://github.com/angular/components/pull/9257#issuecomment-651342226.\n */\n// TODO: TODO: Move this back into `MatDialogRef` when we provide an official mock dialog ref.\nexport function _closeDialogVia<R>(ref: MatDialogRef<R>, interactionType: FocusOrigin, result?: R) {\n  // Some mock dialog ref instances in tests do not have the `_containerInstance` property.\n  // For those, we keep the behavior as is and do not deal with the interaction type.\n  if (ref._containerInstance !== undefined) {\n    ref._containerInstance._closeInteractionType = interactionType;\n  }\n  return ref.close(result);\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directionality} from '@angular/cdk/bidi';\nimport {\n  Overlay,\n  OverlayConfig,\n  OverlayContainer,\n  OverlayRef,\n  ScrollStrategy,\n} from '@angular/cdk/overlay';\nimport {ComponentPortal, ComponentType, TemplatePortal} from '@angular/cdk/portal';\nimport {Location} from '@angular/common';\nimport {\n  Directive,\n  Inject,\n  Injectable,\n  InjectionToken,\n  Injector,\n  OnDestroy,\n  Optional,\n  SkipSelf,\n  StaticProvider,\n  TemplateRef,\n  Type,\n} from '@angular/core';\nimport {defer, Observable, of as observableOf, Subject} from 'rxjs';\nimport {startWith} from 'rxjs/operators';\nimport {MatDialogConfig} from './dialog-config';\nimport {MatDialogContainer, _MatDialogContainerBase} from './dialog-container';\nimport {MatDialogRef} from './dialog-ref';\n\n\n/** Injection token that can be used to access the data that was passed in to a dialog. */\nexport const MAT_DIALOG_DATA = new InjectionToken<any>('MatDialogData');\n\n/** Injection token that can be used to specify default dialog options. */\nexport const MAT_DIALOG_DEFAULT_OPTIONS =\n    new InjectionToken<MatDialogConfig>('mat-dialog-default-options');\n\n/** Injection token that determines the scroll handling while the dialog is open. */\nexport const MAT_DIALOG_SCROLL_STRATEGY =\n    new InjectionToken<() => ScrollStrategy>('mat-dialog-scroll-strategy');\n\n/** @docs-private */\nexport function MAT_DIALOG_SCROLL_STRATEGY_FACTORY(overlay: Overlay): () => ScrollStrategy {\n  return () => overlay.scrollStrategies.block();\n}\n\n/** @docs-private */\nexport function MAT_DIALOG_SCROLL_STRATEGY_PROVIDER_FACTORY(overlay: Overlay):\n  () => ScrollStrategy {\n  return () => overlay.scrollStrategies.block();\n}\n\n/** @docs-private */\nexport const MAT_DIALOG_SCROLL_STRATEGY_PROVIDER = {\n  provide: MAT_DIALOG_SCROLL_STRATEGY,\n  deps: [Overlay],\n  useFactory: MAT_DIALOG_SCROLL_STRATEGY_PROVIDER_FACTORY,\n};\n\n/**\n * Base class for dialog services. The base dialog service allows\n * for arbitrary dialog refs and dialog container components.\n */\n@Directive()\nexport abstract class _MatDialogBase<C extends _MatDialogContainerBase> implements OnDestroy {\n  private _openDialogsAtThisLevel: MatDialogRef<any>[] = [];\n  private readonly _afterAllClosedAtThisLevel = new Subject<void>();\n  private readonly _afterOpenedAtThisLevel = new Subject<MatDialogRef<any>>();\n  private _ariaHiddenElements = new Map<Element, string|null>();\n  private _scrollStrategy: () => ScrollStrategy;\n\n  /** Keeps track of the currently-open dialogs. */\n  get openDialogs(): MatDialogRef<any>[] {\n    return this._parentDialog ? this._parentDialog.openDialogs : this._openDialogsAtThisLevel;\n  }\n\n  /** Stream that emits when a dialog has been opened. */\n  get afterOpened(): Subject<MatDialogRef<any>> {\n    return this._parentDialog ? this._parentDialog.afterOpened : this._afterOpenedAtThisLevel;\n  }\n\n  _getAfterAllClosed(): Subject<void> {\n    const parent = this._parentDialog;\n    return parent ? parent._getAfterAllClosed() : this._afterAllClosedAtThisLevel;\n  }\n\n  // TODO (jelbourn): tighten the typing right-hand side of this expression.\n  /**\n   * Stream that emits when all open dialog have finished closing.\n   * Will emit on subscribe if there are no open dialogs to begin with.\n   */\n  readonly afterAllClosed: Observable<void> = defer(() => this.openDialogs.length ?\n      this._getAfterAllClosed() :\n      this._getAfterAllClosed().pipe(startWith(undefined))) as Observable<any>;\n\n  constructor(\n      private _overlay: Overlay,\n      private _injector: Injector,\n      private _defaultOptions: MatDialogConfig|undefined,\n      private _parentDialog: _MatDialogBase<C>|undefined,\n      private _overlayContainer: OverlayContainer,\n      scrollStrategy: any,\n      private _dialogRefConstructor: Type<MatDialogRef<any>>,\n      private _dialogContainerType: Type<C>,\n      private _dialogDataToken: InjectionToken<any>) {\n    this._scrollStrategy = scrollStrategy;\n  }\n\n  /**\n   * Opens a modal dialog containing the given component.\n   * @param componentOrTemplateRef Type of the component to load into the dialog,\n   *     or a TemplateRef to instantiate as the dialog content.\n   * @param config Extra configuration options.\n   * @returns Reference to the newly-opened dialog.\n   */\n  open<T, D = any, R = any>(componentOrTemplateRef: ComponentType<T> | TemplateRef<T>,\n          config?: MatDialogConfig<D>): MatDialogRef<T, R> {\n\n    config = _applyConfigDefaults(config, this._defaultOptions || new MatDialogConfig());\n\n    if (config.id && this.getDialogById(config.id) &&\n      (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw Error(`Dialog with id \"${config.id}\" exists already. The dialog id must be unique.`);\n    }\n\n    const overlayRef = this._createOverlay(config);\n    const dialogContainer = this._attachDialogContainer(overlayRef, config);\n    const dialogRef = this._attachDialogContent<T, R>(componentOrTemplateRef,\n                                                      dialogContainer,\n                                                      overlayRef,\n                                                      config);\n\n    // If this is the first dialog that we're opening, hide all the non-overlay content.\n    if (!this.openDialogs.length) {\n      this._hideNonDialogContentFromAssistiveTechnology();\n    }\n\n    this.openDialogs.push(dialogRef);\n    dialogRef.afterClosed().subscribe(() => this._removeOpenDialog(dialogRef));\n    this.afterOpened.next(dialogRef);\n\n    // Notify the dialog container that the content has been attached.\n    dialogContainer._initializeWithAttachedContent();\n\n    return dialogRef;\n  }\n\n  /**\n   * Closes all of the currently-open dialogs.\n   */\n  closeAll(): void {\n    this._closeDialogs(this.openDialogs);\n  }\n\n  /**\n   * Finds an open dialog by its id.\n   * @param id ID to use when looking up the dialog.\n   */\n  getDialogById(id: string): MatDialogRef<any> | undefined {\n    return this.openDialogs.find(dialog => dialog.id === id);\n  }\n\n  ngOnDestroy() {\n    // Only close the dialogs at this level on destroy\n    // since the parent service may still be active.\n    this._closeDialogs(this._openDialogsAtThisLevel);\n    this._afterAllClosedAtThisLevel.complete();\n    this._afterOpenedAtThisLevel.complete();\n  }\n\n  /**\n   * Creates the overlay into which the dialog will be loaded.\n   * @param config The dialog configuration.\n   * @returns A promise resolving to the OverlayRef for the created overlay.\n   */\n  private _createOverlay(config: MatDialogConfig): OverlayRef {\n    const overlayConfig = this._getOverlayConfig(config);\n    return this._overlay.create(overlayConfig);\n  }\n\n  /**\n   * Creates an overlay config from a dialog config.\n   * @param dialogConfig The dialog configuration.\n   * @returns The overlay configuration.\n   */\n  private _getOverlayConfig(dialogConfig: MatDialogConfig): OverlayConfig {\n    const state = new OverlayConfig({\n      positionStrategy: this._overlay.position().global(),\n      scrollStrategy: dialogConfig.scrollStrategy || this._scrollStrategy(),\n      panelClass: dialogConfig.panelClass,\n      hasBackdrop: dialogConfig.hasBackdrop,\n      direction: dialogConfig.direction,\n      minWidth: dialogConfig.minWidth,\n      minHeight: dialogConfig.minHeight,\n      maxWidth: dialogConfig.maxWidth,\n      maxHeight: dialogConfig.maxHeight,\n      disposeOnNavigation: dialogConfig.closeOnNavigation\n    });\n\n    if (dialogConfig.backdropClass) {\n      state.backdropClass = dialogConfig.backdropClass;\n    }\n\n    return state;\n  }\n\n  /**\n   * Attaches a dialog container to a dialog's already-created overlay.\n   * @param overlay Reference to the dialog's underlying overlay.\n   * @param config The dialog configuration.\n   * @returns A promise resolving to a ComponentRef for the attached container.\n   */\n  private _attachDialogContainer(overlay: OverlayRef, config: MatDialogConfig): C {\n    const userInjector = config && config.viewContainerRef && config.viewContainerRef.injector;\n    const injector = Injector.create({\n      parent: userInjector || this._injector,\n      providers: [{provide: MatDialogConfig, useValue: config}]\n    });\n\n    const containerPortal = new ComponentPortal(this._dialogContainerType,\n        config.viewContainerRef, injector, config.componentFactoryResolver);\n    const containerRef = overlay.attach<C>(containerPortal);\n\n    return containerRef.instance;\n  }\n\n  /**\n   * Attaches the user-provided component to the already-created dialog container.\n   * @param componentOrTemplateRef The type of component being loaded into the dialog,\n   *     or a TemplateRef to instantiate as the content.\n   * @param dialogContainer Reference to the wrapping dialog container.\n   * @param overlayRef Reference to the overlay in which the dialog resides.\n   * @param config The dialog configuration.\n   * @returns A promise resolving to the MatDialogRef that should be returned to the user.\n   */\n  private _attachDialogContent<T, R>(\n      componentOrTemplateRef: ComponentType<T> | TemplateRef<T>,\n      dialogContainer: C,\n      overlayRef: OverlayRef,\n      config: MatDialogConfig): MatDialogRef<T, R> {\n\n    // Create a reference to the dialog we're creating in order to give the user a handle\n    // to modify and close it.\n    const dialogRef = new this._dialogRefConstructor(overlayRef, dialogContainer, config.id);\n\n    if (componentOrTemplateRef instanceof TemplateRef) {\n      dialogContainer.attachTemplatePortal(\n        new TemplatePortal<T>(componentOrTemplateRef, null!,\n          <any>{$implicit: config.data, dialogRef}));\n    } else {\n      const injector = this._createInjector<T>(config, dialogRef, dialogContainer);\n      const contentRef = dialogContainer.attachComponentPortal<T>(\n          new ComponentPortal(componentOrTemplateRef, config.viewContainerRef, injector));\n      dialogRef.componentInstance = contentRef.instance;\n    }\n\n    dialogRef\n      .updateSize(config.width, config.height)\n      .updatePosition(config.position);\n\n    return dialogRef;\n  }\n\n  /**\n   * Creates a custom injector to be used inside the dialog. This allows a component loaded inside\n   * of a dialog to close itself and, optionally, to return a value.\n   * @param config Config object that is used to construct the dialog.\n   * @param dialogRef Reference to the dialog.\n   * @param dialogContainer Dialog container element that wraps all of the contents.\n   * @returns The custom injector that can be used inside the dialog.\n   */\n  private _createInjector<T>(\n      config: MatDialogConfig,\n      dialogRef: MatDialogRef<T>,\n      dialogContainer: C): Injector {\n\n    const userInjector = config && config.viewContainerRef && config.viewContainerRef.injector;\n\n    // The dialog container should be provided as the dialog container and the dialog's\n    // content are created out of the same `ViewContainerRef` and as such, are siblings\n    // for injector purposes. To allow the hierarchy that is expected, the dialog\n    // container is explicitly provided in the injector.\n    const providers: StaticProvider[] = [\n      {provide: this._dialogContainerType, useValue: dialogContainer},\n      {provide: this._dialogDataToken, useValue: config.data},\n      {provide: this._dialogRefConstructor, useValue: dialogRef}\n    ];\n\n    if (config.direction &&\n        (!userInjector || !userInjector.get<Directionality | null>(Directionality, null))) {\n      providers.push({\n        provide: Directionality,\n        useValue: {value: config.direction, change: observableOf()}\n      });\n    }\n\n    return Injector.create({parent: userInjector || this._injector, providers});\n  }\n\n  /**\n   * Removes a dialog from the array of open dialogs.\n   * @param dialogRef Dialog to be removed.\n   */\n  private _removeOpenDialog(dialogRef: MatDialogRef<any>) {\n    const index = this.openDialogs.indexOf(dialogRef);\n\n    if (index > -1) {\n      this.openDialogs.splice(index, 1);\n\n      // If all the dialogs were closed, remove/restore the `aria-hidden`\n      // to a the siblings and emit to the `afterAllClosed` stream.\n      if (!this.openDialogs.length) {\n        this._ariaHiddenElements.forEach((previousValue, element) => {\n          if (previousValue) {\n            element.setAttribute('aria-hidden', previousValue);\n          } else {\n            element.removeAttribute('aria-hidden');\n          }\n        });\n\n        this._ariaHiddenElements.clear();\n        this._getAfterAllClosed().next();\n      }\n    }\n  }\n\n  /**\n   * Hides all of the content that isn't an overlay from assistive technology.\n   */\n  private _hideNonDialogContentFromAssistiveTechnology() {\n    const overlayContainer = this._overlayContainer.getContainerElement();\n\n    // Ensure that the overlay container is attached to the DOM.\n    if (overlayContainer.parentElement) {\n      const siblings = overlayContainer.parentElement.children;\n\n      for (let i = siblings.length - 1; i > -1; i--) {\n        let sibling = siblings[i];\n\n        if (sibling !== overlayContainer &&\n          sibling.nodeName !== 'SCRIPT' &&\n          sibling.nodeName !== 'STYLE' &&\n          !sibling.hasAttribute('aria-live')) {\n\n          this._ariaHiddenElements.set(sibling, sibling.getAttribute('aria-hidden'));\n          sibling.setAttribute('aria-hidden', 'true');\n        }\n      }\n    }\n  }\n\n  /** Closes all of the dialogs in an array. */\n  private _closeDialogs(dialogs: MatDialogRef<any>[]) {\n    let i = dialogs.length;\n\n    while (i--) {\n      // The `_openDialogs` property isn't updated after close until the rxjs subscription\n      // runs on the next microtask, in addition to modifying the array as we're going\n      // through it. We loop through all of them and call close without assuming that\n      // they'll be removed from the list instantaneously.\n      dialogs[i].close();\n    }\n  }\n\n}\n\n/**\n * Service to open Material Design modal dialogs.\n */\n@Injectable()\nexport class MatDialog extends _MatDialogBase<MatDialogContainer> {\n  constructor(\n      overlay: Overlay,\n      injector: Injector,\n      /**\n       * @deprecated `_location` parameter to be removed.\n       * @breaking-change 10.0.0\n       */\n      @Optional() location: Location,\n      @Optional() @Inject(MAT_DIALOG_DEFAULT_OPTIONS) defaultOptions: MatDialogConfig,\n      @Inject(MAT_DIALOG_SCROLL_STRATEGY) scrollStrategy: any,\n      @Optional() @SkipSelf() parentDialog: MatDialog,\n      overlayContainer: OverlayContainer) {\n    super(overlay, injector, defaultOptions, parentDialog, overlayContainer, scrollStrategy,\n        MatDialogRef, MatDialogContainer, MAT_DIALOG_DATA);\n  }\n}\n\n/**\n * Applies default options to the dialog config.\n * @param config Config to be modified.\n * @param defaultOptions Default options provided.\n * @returns The new configuration object.\n */\nfunction _applyConfigDefaults(\n    config?: MatDialogConfig, defaultOptions?: MatDialogConfig): MatDialogConfig {\n  return {...defaultOptions, ...config};\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  Directive,\n  Input,\n  OnChanges,\n  OnInit,\n  Optional,\n  SimpleChanges,\n  ElementRef,\n} from '@angular/core';\nimport {MatDialog} from './dialog';\nimport {_closeDialogVia, MatDialogRef} from './dialog-ref';\n\n/** Counter used to generate unique IDs for dialog elements. */\nlet dialogElementUid = 0;\n\n/**\n * Button that will close the current dialog.\n */\n@Directive({\n  selector: '[mat-dialog-close], [matDialogClose]',\n  exportAs: 'matDialogClose',\n  host: {\n    '(click)': '_onButtonClick($event)',\n    '[attr.aria-label]': 'ariaLabel || null',\n    '[attr.type]': 'type',\n  }\n})\nexport class MatDialogClose implements OnInit, OnChanges {\n  /** Screenreader label for the button. */\n  @Input('aria-label') ariaLabel: string;\n\n  /** Default to \"button\" to prevents accidental form submits. */\n  @Input() type: 'submit' | 'button' | 'reset' = 'button';\n\n  /** Dialog close input. */\n  @Input('mat-dialog-close') dialogResult: any;\n\n  @Input('matDialogClose') _matDialogClose: any;\n\n  constructor(\n    // The dialog title directive is always used in combination with a `MatDialogRef`.\n    // tslint:disable-next-line: lightweight-tokens\n    @Optional() public dialogRef: MatDialogRef<any>,\n    private _elementRef: ElementRef<HTMLElement>,\n    private _dialog: MatDialog) {}\n\n  ngOnInit() {\n    if (!this.dialogRef) {\n      // When this directive is included in a dialog via TemplateRef (rather than being\n      // in a Component), the DialogRef isn't available via injection because embedded\n      // views cannot be given a custom injector. Instead, we look up the DialogRef by\n      // ID. This must occur in `onInit`, as the ID binding for the dialog container won't\n      // be resolved at constructor time.\n      this.dialogRef = getClosestDialog(this._elementRef, this._dialog.openDialogs)!;\n    }\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    const proxiedChange = changes['_matDialogClose'] || changes['_matDialogCloseResult'];\n\n    if (proxiedChange) {\n      this.dialogResult = proxiedChange.currentValue;\n    }\n  }\n\n  _onButtonClick(event: MouseEvent) {\n    // Determinate the focus origin using the click event, because using the FocusMonitor will\n    // result in incorrect origins. Most of the time, close buttons will be auto focused in the\n    // dialog, and therefore clicking the button won't result in a focus change. This means that\n    // the FocusMonitor won't detect any origin change, and will always output `program`.\n    _closeDialogVia(this.dialogRef,\n        event.screenX === 0 && event.screenY === 0 ? 'keyboard' : 'mouse', this.dialogResult);\n  }\n}\n\n/**\n * Title of a dialog element. Stays fixed to the top of the dialog when scrolling.\n */\n@Directive({\n  selector: '[mat-dialog-title], [matDialogTitle]',\n  exportAs: 'matDialogTitle',\n  host: {\n    'class': 'mat-dialog-title',\n    '[id]': 'id',\n  },\n})\nexport class MatDialogTitle implements OnInit {\n  @Input() id: string = `mat-dialog-title-${dialogElementUid++}`;\n\n  constructor(\n      // The dialog title directive is always used in combination with a `MatDialogRef`.\n      // tslint:disable-next-line: lightweight-tokens\n      @Optional() private _dialogRef: MatDialogRef<any>,\n      private _elementRef: ElementRef<HTMLElement>,\n      private _dialog: MatDialog) {}\n\n  ngOnInit() {\n    if (!this._dialogRef) {\n      this._dialogRef = getClosestDialog(this._elementRef, this._dialog.openDialogs)!;\n    }\n\n    if (this._dialogRef) {\n      Promise.resolve().then(() => {\n        const container = this._dialogRef._containerInstance;\n\n        if (container && !container._ariaLabelledBy) {\n          container._ariaLabelledBy = this.id;\n        }\n      });\n    }\n  }\n}\n\n\n/**\n * Scrollable content container of a dialog.\n */\n@Directive({\n  selector: `[mat-dialog-content], mat-dialog-content, [matDialogContent]`,\n  host: {'class': 'mat-dialog-content'}\n})\nexport class MatDialogContent {}\n\n\n/**\n * Container for the bottom action buttons in a dialog.\n * Stays fixed to the bottom when scrolling.\n */\n@Directive({\n  selector: `[mat-dialog-actions], mat-dialog-actions, [matDialogActions]`,\n  host: {'class': 'mat-dialog-actions'}\n})\nexport class MatDialogActions {}\n\n\n/**\n * Finds the closest MatDialogRef to an element by looking at the DOM.\n * @param element Element relative to which to look for a dialog.\n * @param openDialogs References to the currently-open dialogs.\n */\nfunction getClosestDialog(element: ElementRef<HTMLElement>, openDialogs: MatDialogRef<any>[]) {\n  let parent: HTMLElement | null = element.nativeElement.parentElement;\n\n  while (parent && !parent.classList.contains('mat-dialog-container')) {\n    parent = parent.parentElement;\n  }\n\n  return parent ? openDialogs.find(dialog => dialog.id === parent!.id) : null;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {OverlayModule} from '@angular/cdk/overlay';\nimport {PortalModule} from '@angular/cdk/portal';\nimport {NgModule} from '@angular/core';\nimport {MatCommonModule} from '@angular/material/core';\nimport {MAT_DIALOG_SCROLL_STRATEGY_PROVIDER, MatDialog} from './dialog';\nimport {MatDialogContainer} from './dialog-container';\nimport {\n  MatDialogActions,\n  MatDialogClose,\n  MatDialogContent,\n  MatDialogTitle,\n} from './dialog-content-directives';\n\n\n@NgModule({\n  imports: [\n    OverlayModule,\n    PortalModule,\n    MatCommonModule,\n  ],\n  exports: [\n    MatDialogContainer,\n    MatDialogClose,\n    MatDialogTitle,\n    MatDialogContent,\n    MatDialogActions,\n    MatCommonModule,\n  ],\n  declarations: [\n    MatDialogContainer,\n    MatDialogClose,\n    MatDialogTitle,\n    MatDialogActions,\n    MatDialogContent,\n  ],\n  providers: [\n    MatDialog,\n    MAT_DIALOG_SCROLL_STRATEGY_PROVIDER,\n  ],\n  entryComponents: [MatDialogContainer],\n})\nexport class MatDialogModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './dialog-module';\nexport * from './dialog';\nexport * from './dialog-container';\nexport * from './dialog-content-directives';\nexport * from './dialog-config';\nexport * from './dialog-ref';\nexport * from './dialog-animations';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {NgModule} from '@angular/core';\n\n\n@NgModule({})\nexport class LayoutModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {Injectable} from '@angular/core';\nimport {Platform} from '@angular/cdk/platform';\n\n/** Global registry for all dynamically-created, injected media queries. */\nconst mediaQueriesForWebkitCompatibility: Set<string> = new Set<string>();\n\n/** Style tag that holds all of the dynamically-created media queries. */\nlet mediaQueryStyleNode: HTMLStyleElement | undefined;\n\n/** A utility for calling matchMedia queries. */\n@Injectable({providedIn: 'root'})\nexport class MediaMatcher {\n  /** The internal matchMedia method to return back a MediaQueryList like object. */\n  private _matchMedia: (query: string) => MediaQueryList;\n\n  constructor(private _platform: Platform) {\n    this._matchMedia = this._platform.isBrowser && window.matchMedia ?\n      // matchMedia is bound to the window scope intentionally as it is an illegal invocation to\n      // call it from a different scope.\n      window.matchMedia.bind(window) :\n      noopMatchMedia;\n  }\n\n  /**\n   * Evaluates the given media query and returns the native MediaQueryList from which results\n   * can be retrieved.\n   * Confirms the layout engine will trigger for the selector query provided and returns the\n   * MediaQueryList for the query provided.\n   */\n  matchMedia(query: string): MediaQueryList {\n    if (this._platform.WEBKIT) {\n      createEmptyStyleRule(query);\n    }\n    return this._matchMedia(query);\n  }\n}\n\n/**\n * For Webkit engines that only trigger the MediaQueryListListener when\n * there is at least one CSS selector for the respective media query.\n */\nfunction createEmptyStyleRule(query: string) {\n  if (mediaQueriesForWebkitCompatibility.has(query)) {\n    return;\n  }\n\n  try {\n    if (!mediaQueryStyleNode) {\n      mediaQueryStyleNode = document.createElement('style');\n      mediaQueryStyleNode.setAttribute('type', 'text/css');\n      document.head!.appendChild(mediaQueryStyleNode);\n    }\n\n    if (mediaQueryStyleNode.sheet) {\n      (mediaQueryStyleNode.sheet as CSSStyleSheet)\n          .insertRule(`@media ${query} {.fx-query-test{ }}`, 0);\n      mediaQueriesForWebkitCompatibility.add(query);\n    }\n  } catch (e) {\n    console.error(e);\n  }\n}\n\n/** No-op matchMedia replacement for non-browser platforms. */\nfunction noopMatchMedia(query: string): MediaQueryList {\n  // Use `as any` here to avoid adding additional necessary properties for\n  // the noop matcher.\n  return {\n    matches: query === 'all' || query === '',\n    media: query,\n    addListener: () => {},\n    removeListener: () => {}\n  } as any;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {coerceArray} from '@angular/cdk/coercion';\nimport {Injectable, NgZone, OnDestroy} from '@angular/core';\nimport {combineLatest, concat, Observable, Observer, Subject} from 'rxjs';\nimport {debounceTime, map, skip, startWith, take, takeUntil} from 'rxjs/operators';\nimport {MediaMatcher} from './media-matcher';\n\n\n/** The current state of a layout breakpoint. */\nexport interface BreakpointState {\n  /** Whether the breakpoint is currently matching. */\n  matches: boolean;\n  /**\n   * A key boolean pair for each query provided to the observe method,\n   * with its current matched state.\n   */\n  breakpoints: {\n    [key: string]: boolean;\n  };\n}\n\n/** The current state of a layout breakpoint. */\ninterface InternalBreakpointState {\n  /** Whether the breakpoint is currently matching. */\n  matches: boolean;\n  /** The media query being to be matched */\n  query: string;\n}\n\ninterface Query {\n  observable: Observable<InternalBreakpointState>;\n  mql: MediaQueryList;\n}\n\n/** Utility for checking the matching state of @media queries. */\n@Injectable({providedIn: 'root'})\nexport class BreakpointObserver implements OnDestroy {\n  /**  A map of all media queries currently being listened for. */\n  private _queries = new Map<string, Query>();\n  /** A subject for all other observables to takeUntil based on. */\n  private _destroySubject = new Subject<void>();\n\n  constructor(private _mediaMatcher: MediaMatcher, private _zone: NgZone) {}\n\n  /** Completes the active subject, signalling to all other observables to complete. */\n  ngOnDestroy() {\n    this._destroySubject.next();\n    this._destroySubject.complete();\n  }\n\n  /**\n   * Whether one or more media queries match the current viewport size.\n   * @param value One or more media queries to check.\n   * @returns Whether any of the media queries match.\n   */\n  isMatched(value: string | readonly string[]): boolean {\n    const queries = splitQueries(coerceArray(value));\n    return queries.some(mediaQuery => this._registerQuery(mediaQuery).mql.matches);\n  }\n\n  /**\n   * Gets an observable of results for the given queries that will emit new results for any changes\n   * in matching of the given queries.\n   * @param value One or more media queries to check.\n   * @returns A stream of matches for the given queries.\n   */\n  observe(value: string | readonly string[]): Observable<BreakpointState> {\n    const queries = splitQueries(coerceArray(value));\n    const observables = queries.map(query => this._registerQuery(query).observable);\n\n    let stateObservable = combineLatest(observables);\n    // Emit the first state immediately, and then debounce the subsequent emissions.\n    stateObservable = concat(\n      stateObservable.pipe(take(1)),\n      stateObservable.pipe(skip(1), debounceTime(0)));\n    return stateObservable.pipe(map(breakpointStates => {\n      const response: BreakpointState = {\n        matches: false,\n        breakpoints: {},\n      };\n      breakpointStates.forEach(({matches, query}) => {\n        response.matches = response.matches || matches;\n        response.breakpoints[query] = matches;\n      });\n      return response;\n    }));\n  }\n\n  /** Registers a specific query to be listened for. */\n  private _registerQuery(query: string): Query {\n    // Only set up a new MediaQueryList if it is not already being listened for.\n    if (this._queries.has(query)) {\n      return this._queries.get(query)!;\n    }\n\n    const mql = this._mediaMatcher.matchMedia(query);\n\n    // Create callback for match changes and add it is as a listener.\n    const queryObservable = new Observable((observer: Observer<MediaQueryList>) => {\n      // Listener callback methods are wrapped to be placed back in ngZone. Callbacks must be placed\n      // back into the zone because matchMedia is only included in Zone.js by loading the\n      // webapis-media-query.js file alongside the zone.js file.  Additionally, some browsers do not\n      // have MediaQueryList inherit from EventTarget, which causes inconsistencies in how Zone.js\n      // patches it.\n      const handler = (e: any) => this._zone.run(() => observer.next(e));\n      mql.addListener(handler);\n\n      return () => {\n        mql.removeListener(handler);\n      };\n    }).pipe(\n      startWith(mql),\n      map(({matches}) => ({query, matches})),\n      takeUntil(this._destroySubject)\n    );\n\n    // Add the MediaQueryList to the set of queries.\n    const output = {observable: queryObservable, mql};\n    this._queries.set(query, output);\n    return output;\n  }\n}\n\n/**\n * Split each query string into separate query strings if two queries are provided as comma\n * separated.\n */\nfunction splitQueries(queries: readonly string[]): readonly string[] {\n  return queries.map(query => query.split(','))\n                .reduce((a1, a2) => a1.concat(a2))\n                .map(query => query.trim());\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// PascalCase is being used as Breakpoints is used like an enum.\n// tslint:disable-next-line:variable-name\nexport const Breakpoints = {\n  XSmall: '(max-width: 599.99px)',\n  Small: '(min-width: 600px) and (max-width: 959.99px)',\n  Medium: '(min-width: 960px) and (max-width: 1279.99px)',\n  Large: '(min-width: 1280px) and (max-width: 1919.99px)',\n  XLarge: '(min-width: 1920px)',\n\n  Handset: '(max-width: 599.99px) and (orientation: portrait), ' +\n           '(max-width: 959.99px) and (orientation: landscape)',\n  Tablet: '(min-width: 600px) and (max-width: 839.99px) and (orientation: portrait), ' +\n          '(min-width: 960px) and (max-width: 1279.99px) and (orientation: landscape)',\n  Web: '(min-width: 840px) and (orientation: portrait), ' +\n       '(min-width: 1280px) and (orientation: landscape)',\n\n  HandsetPortrait: '(max-width: 599.99px) and (orientation: portrait)',\n  TabletPortrait: '(min-width: 600px) and (max-width: 839.99px) and (orientation: portrait)',\n  WebPortrait: '(min-width: 840px) and (orientation: portrait)',\n\n  HandsetLandscape: '(max-width: 959.99px) and (orientation: landscape)',\n  TabletLandscape: '(min-width: 960px) and (max-width: 1279.99px) and (orientation: landscape)',\n  WebLandscape: '(min-width: 1280px) and (orientation: landscape)',\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport {LayoutModule} from './layout-module';\nexport {BreakpointObserver, BreakpointState} from './breakpoints-observer';\nexport {Breakpoints} from './breakpoints';\nexport {MediaMatcher} from './media-matcher';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","import { concat } from '../observable/concat';\nimport { of } from '../observable/of';\nexport function endWith(...array) {\n    return (source) => concat(source, of(...array));\n}\n//# sourceMappingURL=endWith.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar takeLast_1 = require(\"../../operator/takeLast\");\nrxjs_1.Observable.prototype.takeLast = takeLast_1.takeLast;\n//# sourceMappingURL=takeLast.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Collects all source emissions and emits them as an array when the source completes.\n *\n * <span class=\"informal\">Get all values inside an array when the source completes</span>\n *\n * <img src=\"./img/toArray.png\" width=\"100%\">\n *\n * `toArray` will wait until the source Observable completes\n * before emitting the array containing all emissions.\n * When the source Observable errors no array will be emitted.\n *\n * @example <caption>Create array from input</caption>\n * const input = Rx.Observable.interval(100).take(4);\n *\n * input.toArray()\n *   .subscribe(arr => console.log(arr)); // [0,1,2,3]\n *\n * @see {@link buffer}\n *\n * @return {Observable<any[]>|WebSocketSubject<T>|Observable<T>}\n * @method toArray\n * @owner Observable\n */\nfunction toArray() {\n    return operators_1.toArray()(this);\n}\nexports.toArray = toArray;\n//# sourceMappingURL=toArray.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.fromEventPattern = rxjs_1.fromEventPattern;\n//# sourceMappingURL=fromEventPattern.js.map","import { scan } from './scan';\nimport { takeLast } from './takeLast';\nimport { defaultIfEmpty } from './defaultIfEmpty';\nimport { pipe } from '../util/pipe';\nexport function reduce(accumulator, seed) {\n    if (arguments.length >= 2) {\n        return function reduceOperatorFunctionWithSeed(source) {\n            return pipe(scan(accumulator, seed), takeLast(1), defaultIfEmpty(seed))(source);\n        };\n    }\n    return function reduceOperatorFunction(source) {\n        return pipe(scan((acc, value, index) => accumulator(acc, value, index + 1)), takeLast(1))(source);\n    };\n}\n//# sourceMappingURL=reduce.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Returns an Observable that mirrors the source Observable with the exception of an `error`. If the source Observable\n * calls `error`, this method will resubscribe to the source Observable for a maximum of `count` resubscriptions (given\n * as a number parameter) rather than propagating the `error` call.\n *\n * <img src=\"./img/retry.png\" width=\"100%\">\n *\n * Any and all items emitted by the source Observable will be emitted by the resulting Observable, even those emitted\n * during failed subscriptions. For example, if an Observable fails at first but emits [1, 2] then succeeds the second\n * time and emits: [1, 2, 3, 4, 5] then the complete stream of emissions and notifications\n * would be: [1, 2, 1, 2, 3, 4, 5, `complete`].\n * @param {number} count - Number of retry attempts before failing.\n * @return {Observable} The source Observable modified with the retry logic.\n * @method retry\n * @owner Observable\n */\nfunction retry(count) {\n    if (count === void 0) { count = -1; }\n    return operators_1.retry(count)(this);\n}\nexports.retry = retry;\n//# sourceMappingURL=retry.js.map","import { AjaxObservable } from './AjaxObservable';\nexport const ajax = (() => AjaxObservable.create)();\n//# sourceMappingURL=ajax.js.map","import { innerSubscribe, SimpleInnerSubscriber, SimpleOuterSubscriber } from '../innerSubscribe';\nexport function takeUntil(notifier) {\n    return (source) => source.lift(new TakeUntilOperator(notifier));\n}\nclass TakeUntilOperator {\n    constructor(notifier) {\n        this.notifier = notifier;\n    }\n    call(subscriber, source) {\n        const takeUntilSubscriber = new TakeUntilSubscriber(subscriber);\n        const notifierSubscription = innerSubscribe(this.notifier, new SimpleInnerSubscriber(takeUntilSubscriber));\n        if (notifierSubscription && !takeUntilSubscriber.seenValue) {\n            takeUntilSubscriber.add(notifierSubscription);\n            return source.subscribe(takeUntilSubscriber);\n        }\n        return takeUntilSubscriber;\n    }\n}\nclass TakeUntilSubscriber extends SimpleOuterSubscriber {\n    constructor(destination) {\n        super(destination);\n        this.seenValue = false;\n    }\n    notifyNext() {\n        this.seenValue = true;\n        this.complete();\n    }\n    notifyComplete() {\n    }\n}\n//# sourceMappingURL=takeUntil.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.bindCallback = rxjs_1.bindCallback;\n//# sourceMappingURL=bindCallback.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar catch_1 = require(\"../../operator/catch\");\nrxjs_1.Observable.prototype.catch = catch_1._catch;\nrxjs_1.Observable.prototype._catch = catch_1._catch;\n//# sourceMappingURL=catch.js.map","export default function _classCallCheck(instance, Constructor) {\n  if (!(instance instanceof Constructor)) {\n    throw new TypeError(\"Cannot call a class as a function\");\n  }\n}","import { Subscriber } from '../Subscriber';\nimport { async } from '../scheduler/async';\nexport function sampleTime(period, scheduler = async) {\n    return (source) => source.lift(new SampleTimeOperator(period, scheduler));\n}\nclass SampleTimeOperator {\n    constructor(period, scheduler) {\n        this.period = period;\n        this.scheduler = scheduler;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new SampleTimeSubscriber(subscriber, this.period, this.scheduler));\n    }\n}\nclass SampleTimeSubscriber extends Subscriber {\n    constructor(destination, period, scheduler) {\n        super(destination);\n        this.period = period;\n        this.scheduler = scheduler;\n        this.hasValue = false;\n        this.add(scheduler.schedule(dispatchNotification, period, { subscriber: this, period }));\n    }\n    _next(value) {\n        this.lastValue = value;\n        this.hasValue = true;\n    }\n    notifyNext() {\n        if (this.hasValue) {\n            this.hasValue = false;\n            this.destination.next(this.lastValue);\n        }\n    }\n}\nfunction dispatchNotification(state) {\n    let { subscriber, period } = state;\n    subscriber.notifyNext();\n    this.schedule(state, period);\n}\n//# sourceMappingURL=sampleTime.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Represents all of the notifications from the source Observable as `next`\n * emissions marked with their original types within {@link Notification}\n * objects.\n *\n * <span class=\"informal\">Wraps `next`, `error` and `complete` emissions in\n * {@link Notification} objects, emitted as `next` on the output Observable.\n * </span>\n *\n * <img src=\"./img/materialize.png\" width=\"100%\">\n *\n * `materialize` returns an Observable that emits a `next` notification for each\n * `next`, `error`, or `complete` emission of the source Observable. When the\n * source Observable emits `complete`, the output Observable will emit `next` as\n * a Notification of type \"complete\", and then it will emit `complete` as well.\n * When the source Observable emits `error`, the output will emit `next` as a\n * Notification of type \"error\", and then `complete`.\n *\n * This operator is useful for producing metadata of the source Observable, to\n * be consumed as `next` emissions. Use it in conjunction with\n * {@link dematerialize}.\n *\n * @example <caption>Convert a faulty Observable to an Observable of Notifications</caption>\n * var letters = Rx.Observable.of('a', 'b', 13, 'd');\n * var upperCase = letters.map(x => x.toUpperCase());\n * var materialized = upperCase.materialize();\n * materialized.subscribe(x => console.log(x));\n *\n * // Results in the following:\n * // - Notification {kind: \"N\", value: \"A\", error: undefined, hasValue: true}\n * // - Notification {kind: \"N\", value: \"B\", error: undefined, hasValue: true}\n * // - Notification {kind: \"E\", value: undefined, error: TypeError:\n * //   x.toUpperCase is not a function at MapSubscriber.letters.map.x\n * //   [as project] (http://1…, hasValue: false}\n *\n * @see {@link Notification}\n * @see {@link dematerialize}\n *\n * @return {Observable<Notification<T>>} An Observable that emits\n * {@link Notification} objects that wrap the original emissions from the source\n * Observable with metadata.\n * @method materialize\n * @owner Observable\n */\nfunction materialize() {\n    return operators_1.materialize()(this);\n}\nexports.materialize = materialize;\n//# sourceMappingURL=materialize.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {InjectionToken} from '@angular/core';\n\n\n/** Default `mat-slide-toggle` options that can be overridden. */\nexport interface MatSlideToggleDefaultOptions {\n  /** Whether toggle action triggers value changes in slide toggle. */\n  disableToggleValue?: boolean;\n}\n\n/** Injection token to be used to override the default options for `mat-slide-toggle`. */\nexport const MAT_SLIDE_TOGGLE_DEFAULT_OPTIONS =\n  new InjectionToken<MatSlideToggleDefaultOptions>('mat-slide-toggle-default-options', {\n    providedIn: 'root',\n    factory: () => ({disableToggleValue: false})\n  });\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {FocusMonitor} from '@angular/cdk/a11y';\nimport {BooleanInput, coerceBooleanProperty, NumberInput} from '@angular/cdk/coercion';\nimport {\n  AfterContentInit,\n  Attribute,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ElementRef,\n  EventEmitter,\n  forwardRef,\n  Input,\n  OnDestroy,\n  Output,\n  ViewChild,\n  ViewEncapsulation,\n  Optional,\n  Inject,\n} from '@angular/core';\nimport {ControlValueAccessor, NG_VALUE_ACCESSOR} from '@angular/forms';\nimport {\n  CanColor, CanColorCtor,\n  CanDisable, CanDisableCtor,\n  CanDisableRipple, CanDisableRippleCtor,\n  HasTabIndex, HasTabIndexCtor,\n  mixinColor,\n  mixinDisabled,\n  mixinDisableRipple,\n  mixinTabIndex,\n} from '@angular/material/core';\nimport {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';\nimport {\n  MAT_SLIDE_TOGGLE_DEFAULT_OPTIONS,\n  MatSlideToggleDefaultOptions\n} from './slide-toggle-config';\n\n// Increasing integer for generating unique ids for slide-toggle components.\nlet nextUniqueId = 0;\n\n/** @docs-private */\nexport const MAT_SLIDE_TOGGLE_VALUE_ACCESSOR: any = {\n  provide: NG_VALUE_ACCESSOR,\n  useExisting: forwardRef(() => MatSlideToggle),\n  multi: true\n};\n\n/** Change event object emitted by a MatSlideToggle. */\nexport class MatSlideToggleChange {\n  constructor(\n    /** The source MatSlideToggle of the event. */\n    public source: MatSlideToggle,\n    /** The new `checked` value of the MatSlideToggle. */\n    public checked: boolean) { }\n}\n\n// Boilerplate for applying mixins to MatSlideToggle.\n/** @docs-private */\nclass MatSlideToggleBase {\n  constructor(public _elementRef: ElementRef) {}\n}\nconst _MatSlideToggleMixinBase:\n    HasTabIndexCtor &\n    CanColorCtor &\n    CanDisableRippleCtor &\n    CanDisableCtor &\n    typeof MatSlideToggleBase =\n        mixinTabIndex(mixinColor(mixinDisableRipple(mixinDisabled(MatSlideToggleBase)), 'accent'));\n\n/** Represents a slidable \"switch\" toggle that can be moved between on and off. */\n@Component({\n  selector: 'mat-slide-toggle',\n  exportAs: 'matSlideToggle',\n  host: {\n    'class': 'mat-slide-toggle',\n    '[id]': 'id',\n    // Needs to be `-1` so it can still receive programmatic focus.\n    '[attr.tabindex]': 'disabled ? null : -1',\n    '[attr.aria-label]': 'null',\n    '[attr.aria-labelledby]': 'null',\n    '[class.mat-checked]': 'checked',\n    '[class.mat-disabled]': 'disabled',\n    '[class.mat-slide-toggle-label-before]': 'labelPosition == \"before\"',\n    '[class._mat-animation-noopable]': '_animationMode === \"NoopAnimations\"',\n  },\n  templateUrl: 'slide-toggle.html',\n  styleUrls: ['slide-toggle.css'],\n  providers: [MAT_SLIDE_TOGGLE_VALUE_ACCESSOR],\n  inputs: ['disabled', 'disableRipple', 'color', 'tabIndex'],\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n})\nexport class MatSlideToggle extends _MatSlideToggleMixinBase implements OnDestroy, AfterContentInit,\n                                                                        ControlValueAccessor,\n                                                                        CanDisable, CanColor,\n                                                                        HasTabIndex,\n                                                                        CanDisableRipple {\n  private _onChange = (_: any) => {};\n  private _onTouched = () => {};\n\n  private _uniqueId: string = `mat-slide-toggle-${++nextUniqueId}`;\n  private _required: boolean = false;\n  private _checked: boolean = false;\n\n  /** Reference to the thumb HTMLElement. */\n  @ViewChild('thumbContainer') _thumbEl: ElementRef;\n\n  /** Reference to the thumb bar HTMLElement. */\n  @ViewChild('toggleBar') _thumbBarEl: ElementRef;\n\n  /** Name value will be applied to the input element if present. */\n  @Input() name: string | null = null;\n\n  /** A unique id for the slide-toggle input. If none is supplied, it will be auto-generated. */\n  @Input() id: string = this._uniqueId;\n\n  /** Whether the label should appear after or before the slide-toggle. Defaults to 'after'. */\n  @Input() labelPosition: 'before' | 'after' = 'after';\n\n  /** Used to set the aria-label attribute on the underlying input element. */\n  @Input('aria-label') ariaLabel: string | null = null;\n\n  /** Used to set the aria-labelledby attribute on the underlying input element. */\n  @Input('aria-labelledby') ariaLabelledby: string | null = null;\n\n  /** Whether the slide-toggle is required. */\n  @Input()\n  get required(): boolean { return this._required; }\n  set required(value) { this._required = coerceBooleanProperty(value); }\n\n  /** Whether the slide-toggle element is checked or not. */\n  @Input()\n  get checked(): boolean { return this._checked; }\n  set checked(value) {\n    this._checked = coerceBooleanProperty(value);\n    this._changeDetectorRef.markForCheck();\n  }\n  /** An event will be dispatched each time the slide-toggle changes its value. */\n  @Output() readonly change: EventEmitter<MatSlideToggleChange> =\n      new EventEmitter<MatSlideToggleChange>();\n\n  /**\n   * An event will be dispatched each time the slide-toggle input is toggled.\n   * This event is always emitted when the user toggles the slide toggle, but this does not mean\n   * the slide toggle's value has changed.\n   */\n  @Output() readonly toggleChange: EventEmitter<void> = new EventEmitter<void>();\n\n  /** Returns the unique id for the visual hidden input. */\n  get inputId(): string { return `${this.id || this._uniqueId}-input`; }\n\n  /** Reference to the underlying input element. */\n  @ViewChild('input') _inputElement: ElementRef<HTMLInputElement>;\n\n  constructor(elementRef: ElementRef,\n              private _focusMonitor: FocusMonitor,\n              private _changeDetectorRef: ChangeDetectorRef,\n              @Attribute('tabindex') tabIndex: string,\n              @Inject(MAT_SLIDE_TOGGLE_DEFAULT_OPTIONS)\n                  public defaults: MatSlideToggleDefaultOptions,\n              @Optional() @Inject(ANIMATION_MODULE_TYPE) public _animationMode?: string) {\n    super(elementRef);\n    this.tabIndex = parseInt(tabIndex) || 0;\n  }\n\n  ngAfterContentInit() {\n    this._focusMonitor\n      .monitor(this._elementRef, true)\n      .subscribe(focusOrigin => {\n        // Only forward focus manually when it was received programmatically or through the\n        // keyboard. We should not do this for mouse/touch focus for two reasons:\n        // 1. It can prevent clicks from landing in Chrome (see #18269).\n        // 2. They're already handled by the wrapping `label` element.\n        if (focusOrigin === 'keyboard' || focusOrigin === 'program') {\n          this._inputElement.nativeElement.focus();\n        } else if (!focusOrigin) {\n          // When a focused element becomes disabled, the browser *immediately* fires a blur event.\n          // Angular does not expect events to be raised during change detection, so any state\n          // change (such as a form control's 'ng-touched') will cause a changed-after-checked\n          // error. See https://github.com/angular/angular/issues/17793. To work around this,\n          // we defer telling the form control it has been touched until the next tick.\n          Promise.resolve().then(() => this._onTouched());\n        }\n      });\n  }\n\n  ngOnDestroy() {\n    this._focusMonitor.stopMonitoring(this._elementRef);\n  }\n\n  /** Method being called whenever the underlying input emits a change event. */\n  _onChangeEvent(event: Event) {\n    // We always have to stop propagation on the change event.\n    // Otherwise the change event, from the input element, will bubble up and\n    // emit its event object to the component's `change` output.\n    event.stopPropagation();\n    this.toggleChange.emit();\n\n    // When the slide toggle's config disables toggle change event by setting\n    // `disableToggleValue: true`, the slide toggle's value does not change, and the\n    // checked state of the underlying input needs to be changed back.\n    if (this.defaults.disableToggleValue) {\n      this._inputElement.nativeElement.checked = this.checked;\n      return;\n    }\n\n    // Sync the value from the underlying input element with the component instance.\n    this.checked = this._inputElement.nativeElement.checked;\n\n    // Emit our custom change event only if the underlying input emitted one. This ensures that\n    // there is no change event, when the checked state changes programmatically.\n    this._emitChangeEvent();\n  }\n\n  /** Method being called whenever the slide-toggle has been clicked. */\n  _onInputClick(event: Event) {\n    // We have to stop propagation for click events on the visual hidden input element.\n    // By default, when a user clicks on a label element, a generated click event will be\n    // dispatched on the associated input element. Since we are using a label element as our\n    // root container, the click event on the `slide-toggle` will be executed twice.\n    // The real click event will bubble up, and the generated click event also tries to bubble up.\n    // This will lead to multiple click events.\n    // Preventing bubbling for the second event will solve that issue.\n    event.stopPropagation();\n  }\n\n  /** Implemented as part of ControlValueAccessor. */\n  writeValue(value: any): void {\n    this.checked = !!value;\n  }\n\n  /** Implemented as part of ControlValueAccessor. */\n  registerOnChange(fn: any): void {\n    this._onChange = fn;\n  }\n\n  /** Implemented as part of ControlValueAccessor. */\n  registerOnTouched(fn: any): void {\n    this._onTouched = fn;\n  }\n\n  /** Implemented as a part of ControlValueAccessor. */\n  setDisabledState(isDisabled: boolean): void {\n    this.disabled = isDisabled;\n    this._changeDetectorRef.markForCheck();\n  }\n\n  /** Focuses the slide-toggle. */\n  focus(options?: FocusOptions): void {\n    this._focusMonitor.focusVia(this._inputElement, 'keyboard', options);\n  }\n\n  /** Toggles the checked state of the slide-toggle. */\n  toggle(): void {\n    this.checked = !this.checked;\n    this._onChange(this.checked);\n  }\n\n  /**\n   * Emits a change event on the `change` output. Also notifies the FormControl about the change.\n   */\n  private _emitChangeEvent() {\n    this._onChange(this.checked);\n    this.change.emit(new MatSlideToggleChange(this, this.checked));\n  }\n\n  /** Method being called whenever the label text changes. */\n  _onLabelTextChange() {\n    // Since the event of the `cdkObserveContent` directive runs outside of the zone, the\n    // slide-toggle component will be only marked for check, but no actual change detection runs\n    // automatically. Instead of going back into the zone in order to trigger a change detection\n    // which causes *all* components to be checked (if explicitly marked or not using OnPush),\n    // we only trigger an explicit change detection for the slide-toggle view and its children.\n    this._changeDetectorRef.detectChanges();\n  }\n\n  static ngAcceptInputType_required: BooleanInput;\n  static ngAcceptInputType_checked: BooleanInput;\n  static ngAcceptInputType_disabled: BooleanInput;\n  static ngAcceptInputType_disableRipple: BooleanInput;\n  static ngAcceptInputType_tabIndex: NumberInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  Directive,\n  forwardRef,\n  Provider,\n} from '@angular/core';\nimport {\n  CheckboxRequiredValidator,\n  NG_VALIDATORS,\n} from '@angular/forms';\n\nexport const MAT_SLIDE_TOGGLE_REQUIRED_VALIDATOR: Provider = {\n  provide: NG_VALIDATORS,\n  useExisting: forwardRef(() => MatSlideToggleRequiredValidator),\n  multi: true\n};\n\n/**\n * Validator for Material slide-toggle components with the required attribute in a\n * template-driven form. The default validator for required form controls asserts\n * that the control value is not undefined but that is not appropriate for a slide-toggle\n * where the value is always defined.\n *\n * Required slide-toggle form controls are valid when checked.\n */\n@Directive({\n  selector: `mat-slide-toggle[required][formControlName],\n             mat-slide-toggle[required][formControl], mat-slide-toggle[required][ngModel]`,\n  providers: [MAT_SLIDE_TOGGLE_REQUIRED_VALIDATOR],\n})\nexport class MatSlideToggleRequiredValidator extends CheckboxRequiredValidator {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ObserversModule} from '@angular/cdk/observers';\nimport {NgModule} from '@angular/core';\nimport {MatCommonModule, MatRippleModule} from '@angular/material/core';\nimport {MatSlideToggle} from './slide-toggle';\nimport {MatSlideToggleRequiredValidator} from './slide-toggle-required-validator';\n\n/** This module is used by both original and MDC-based slide-toggle implementations. */\n@NgModule({\n  exports: [MatSlideToggleRequiredValidator],\n  declarations: [MatSlideToggleRequiredValidator],\n})\nexport class _MatSlideToggleRequiredValidatorModule {}\n\n@NgModule({\n  imports: [\n    _MatSlideToggleRequiredValidatorModule,\n    MatRippleModule,\n    MatCommonModule,\n    ObserversModule,\n  ],\n  exports: [\n    _MatSlideToggleRequiredValidatorModule,\n    MatSlideToggle,\n    MatCommonModule\n  ],\n  declarations: [MatSlideToggle],\n})\nexport class MatSlideToggleModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './slide-toggle-module';\nexport * from './slide-toggle';\nexport * from './slide-toggle-config';\nexport * from './slide-toggle-required-validator';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","/**\n * @license Angular v10.1.3\n * (c) 2010-2020 Google LLC. https://angular.io/\n * License: MIT\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nvar TagContentType;\n(function (TagContentType) {\n    TagContentType[TagContentType[\"RAW_TEXT\"] = 0] = \"RAW_TEXT\";\n    TagContentType[TagContentType[\"ESCAPABLE_RAW_TEXT\"] = 1] = \"ESCAPABLE_RAW_TEXT\";\n    TagContentType[TagContentType[\"PARSABLE_DATA\"] = 2] = \"PARSABLE_DATA\";\n})(TagContentType || (TagContentType = {}));\nfunction splitNsName(elementName) {\n    if (elementName[0] != ':') {\n        return [null, elementName];\n    }\n    const colonIndex = elementName.indexOf(':', 1);\n    if (colonIndex == -1) {\n        throw new Error(`Unsupported format \"${elementName}\" expecting \":namespace:name\"`);\n    }\n    return [elementName.slice(1, colonIndex), elementName.slice(colonIndex + 1)];\n}\n// `<ng-container>` tags work the same regardless the namespace\nfunction isNgContainer(tagName) {\n    return splitNsName(tagName)[1] === 'ng-container';\n}\n// `<ng-content>` tags work the same regardless the namespace\nfunction isNgContent(tagName) {\n    return splitNsName(tagName)[1] === 'ng-content';\n}\n// `<ng-template>` tags work the same regardless the namespace\nfunction isNgTemplate(tagName) {\n    return splitNsName(tagName)[1] === 'ng-template';\n}\nfunction getNsPrefix(fullName) {\n    return fullName === null ? null : splitNsName(fullName)[0];\n}\nfunction mergeNsAndName(prefix, localName) {\n    return prefix ? `:${prefix}:${localName}` : localName;\n}\n// see http://www.w3.org/TR/html51/syntax.html#named-character-references\n// see https://html.spec.whatwg.org/multipage/entities.json\n// This list is not exhaustive to keep the compiler footprint low.\n// The `&#123;` / `&#x1ab;` syntax should be used when the named character reference does not\n// exist.\nconst NAMED_ENTITIES = {\n    'Aacute': '\\u00C1',\n    'aacute': '\\u00E1',\n    'Acirc': '\\u00C2',\n    'acirc': '\\u00E2',\n    'acute': '\\u00B4',\n    'AElig': '\\u00C6',\n    'aelig': '\\u00E6',\n    'Agrave': '\\u00C0',\n    'agrave': '\\u00E0',\n    'alefsym': '\\u2135',\n    'Alpha': '\\u0391',\n    'alpha': '\\u03B1',\n    'amp': '&',\n    'and': '\\u2227',\n    'ang': '\\u2220',\n    'apos': '\\u0027',\n    'Aring': '\\u00C5',\n    'aring': '\\u00E5',\n    'asymp': '\\u2248',\n    'Atilde': '\\u00C3',\n    'atilde': '\\u00E3',\n    'Auml': '\\u00C4',\n    'auml': '\\u00E4',\n    'bdquo': '\\u201E',\n    'Beta': '\\u0392',\n    'beta': '\\u03B2',\n    'brvbar': '\\u00A6',\n    'bull': '\\u2022',\n    'cap': '\\u2229',\n    'Ccedil': '\\u00C7',\n    'ccedil': '\\u00E7',\n    'cedil': '\\u00B8',\n    'cent': '\\u00A2',\n    'Chi': '\\u03A7',\n    'chi': '\\u03C7',\n    'circ': '\\u02C6',\n    'clubs': '\\u2663',\n    'cong': '\\u2245',\n    'copy': '\\u00A9',\n    'crarr': '\\u21B5',\n    'cup': '\\u222A',\n    'curren': '\\u00A4',\n    'dagger': '\\u2020',\n    'Dagger': '\\u2021',\n    'darr': '\\u2193',\n    'dArr': '\\u21D3',\n    'deg': '\\u00B0',\n    'Delta': '\\u0394',\n    'delta': '\\u03B4',\n    'diams': '\\u2666',\n    'divide': '\\u00F7',\n    'Eacute': '\\u00C9',\n    'eacute': '\\u00E9',\n    'Ecirc': '\\u00CA',\n    'ecirc': '\\u00EA',\n    'Egrave': '\\u00C8',\n    'egrave': '\\u00E8',\n    'empty': '\\u2205',\n    'emsp': '\\u2003',\n    'ensp': '\\u2002',\n    'Epsilon': '\\u0395',\n    'epsilon': '\\u03B5',\n    'equiv': '\\u2261',\n    'Eta': '\\u0397',\n    'eta': '\\u03B7',\n    'ETH': '\\u00D0',\n    'eth': '\\u00F0',\n    'Euml': '\\u00CB',\n    'euml': '\\u00EB',\n    'euro': '\\u20AC',\n    'exist': '\\u2203',\n    'fnof': '\\u0192',\n    'forall': '\\u2200',\n    'frac12': '\\u00BD',\n    'frac14': '\\u00BC',\n    'frac34': '\\u00BE',\n    'frasl': '\\u2044',\n    'Gamma': '\\u0393',\n    'gamma': '\\u03B3',\n    'ge': '\\u2265',\n    'gt': '>',\n    'harr': '\\u2194',\n    'hArr': '\\u21D4',\n    'hearts': '\\u2665',\n    'hellip': '\\u2026',\n    'Iacute': '\\u00CD',\n    'iacute': '\\u00ED',\n    'Icirc': '\\u00CE',\n    'icirc': '\\u00EE',\n    'iexcl': '\\u00A1',\n    'Igrave': '\\u00CC',\n    'igrave': '\\u00EC',\n    'image': '\\u2111',\n    'infin': '\\u221E',\n    'int': '\\u222B',\n    'Iota': '\\u0399',\n    'iota': '\\u03B9',\n    'iquest': '\\u00BF',\n    'isin': '\\u2208',\n    'Iuml': '\\u00CF',\n    'iuml': '\\u00EF',\n    'Kappa': '\\u039A',\n    'kappa': '\\u03BA',\n    'Lambda': '\\u039B',\n    'lambda': '\\u03BB',\n    'lang': '\\u27E8',\n    'laquo': '\\u00AB',\n    'larr': '\\u2190',\n    'lArr': '\\u21D0',\n    'lceil': '\\u2308',\n    'ldquo': '\\u201C',\n    'le': '\\u2264',\n    'lfloor': '\\u230A',\n    'lowast': '\\u2217',\n    'loz': '\\u25CA',\n    'lrm': '\\u200E',\n    'lsaquo': '\\u2039',\n    'lsquo': '\\u2018',\n    'lt': '<',\n    'macr': '\\u00AF',\n    'mdash': '\\u2014',\n    'micro': '\\u00B5',\n    'middot': '\\u00B7',\n    'minus': '\\u2212',\n    'Mu': '\\u039C',\n    'mu': '\\u03BC',\n    'nabla': '\\u2207',\n    'nbsp': '\\u00A0',\n    'ndash': '\\u2013',\n    'ne': '\\u2260',\n    'ni': '\\u220B',\n    'not': '\\u00AC',\n    'notin': '\\u2209',\n    'nsub': '\\u2284',\n    'Ntilde': '\\u00D1',\n    'ntilde': '\\u00F1',\n    'Nu': '\\u039D',\n    'nu': '\\u03BD',\n    'Oacute': '\\u00D3',\n    'oacute': '\\u00F3',\n    'Ocirc': '\\u00D4',\n    'ocirc': '\\u00F4',\n    'OElig': '\\u0152',\n    'oelig': '\\u0153',\n    'Ograve': '\\u00D2',\n    'ograve': '\\u00F2',\n    'oline': '\\u203E',\n    'Omega': '\\u03A9',\n    'omega': '\\u03C9',\n    'Omicron': '\\u039F',\n    'omicron': '\\u03BF',\n    'oplus': '\\u2295',\n    'or': '\\u2228',\n    'ordf': '\\u00AA',\n    'ordm': '\\u00BA',\n    'Oslash': '\\u00D8',\n    'oslash': '\\u00F8',\n    'Otilde': '\\u00D5',\n    'otilde': '\\u00F5',\n    'otimes': '\\u2297',\n    'Ouml': '\\u00D6',\n    'ouml': '\\u00F6',\n    'para': '\\u00B6',\n    'permil': '\\u2030',\n    'perp': '\\u22A5',\n    'Phi': '\\u03A6',\n    'phi': '\\u03C6',\n    'Pi': '\\u03A0',\n    'pi': '\\u03C0',\n    'piv': '\\u03D6',\n    'plusmn': '\\u00B1',\n    'pound': '\\u00A3',\n    'prime': '\\u2032',\n    'Prime': '\\u2033',\n    'prod': '\\u220F',\n    'prop': '\\u221D',\n    'Psi': '\\u03A8',\n    'psi': '\\u03C8',\n    'quot': '\\u0022',\n    'radic': '\\u221A',\n    'rang': '\\u27E9',\n    'raquo': '\\u00BB',\n    'rarr': '\\u2192',\n    'rArr': '\\u21D2',\n    'rceil': '\\u2309',\n    'rdquo': '\\u201D',\n    'real': '\\u211C',\n    'reg': '\\u00AE',\n    'rfloor': '\\u230B',\n    'Rho': '\\u03A1',\n    'rho': '\\u03C1',\n    'rlm': '\\u200F',\n    'rsaquo': '\\u203A',\n    'rsquo': '\\u2019',\n    'sbquo': '\\u201A',\n    'Scaron': '\\u0160',\n    'scaron': '\\u0161',\n    'sdot': '\\u22C5',\n    'sect': '\\u00A7',\n    'shy': '\\u00AD',\n    'Sigma': '\\u03A3',\n    'sigma': '\\u03C3',\n    'sigmaf': '\\u03C2',\n    'sim': '\\u223C',\n    'spades': '\\u2660',\n    'sub': '\\u2282',\n    'sube': '\\u2286',\n    'sum': '\\u2211',\n    'sup': '\\u2283',\n    'sup1': '\\u00B9',\n    'sup2': '\\u00B2',\n    'sup3': '\\u00B3',\n    'supe': '\\u2287',\n    'szlig': '\\u00DF',\n    'Tau': '\\u03A4',\n    'tau': '\\u03C4',\n    'there4': '\\u2234',\n    'Theta': '\\u0398',\n    'theta': '\\u03B8',\n    'thetasym': '\\u03D1',\n    'thinsp': '\\u2009',\n    'THORN': '\\u00DE',\n    'thorn': '\\u00FE',\n    'tilde': '\\u02DC',\n    'times': '\\u00D7',\n    'trade': '\\u2122',\n    'Uacute': '\\u00DA',\n    'uacute': '\\u00FA',\n    'uarr': '\\u2191',\n    'uArr': '\\u21D1',\n    'Ucirc': '\\u00DB',\n    'ucirc': '\\u00FB',\n    'Ugrave': '\\u00D9',\n    'ugrave': '\\u00F9',\n    'uml': '\\u00A8',\n    'upsih': '\\u03D2',\n    'Upsilon': '\\u03A5',\n    'upsilon': '\\u03C5',\n    'Uuml': '\\u00DC',\n    'uuml': '\\u00FC',\n    'weierp': '\\u2118',\n    'Xi': '\\u039E',\n    'xi': '\\u03BE',\n    'Yacute': '\\u00DD',\n    'yacute': '\\u00FD',\n    'yen': '\\u00A5',\n    'yuml': '\\u00FF',\n    'Yuml': '\\u0178',\n    'Zeta': '\\u0396',\n    'zeta': '\\u03B6',\n    'zwj': '\\u200D',\n    'zwnj': '\\u200C',\n};\n// The &ngsp; pseudo-entity is denoting a space. see:\n// https://github.com/dart-lang/angular/blob/0bb611387d29d65b5af7f9d2515ab571fd3fbee4/_tests/test/compiler/preserve_whitespace_test.dart\nconst NGSP_UNICODE = '\\uE500';\nNAMED_ENTITIES['ngsp'] = NGSP_UNICODE;\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass HtmlTagDefinition {\n    constructor({ closedByChildren, implicitNamespacePrefix, contentType = TagContentType.PARSABLE_DATA, closedByParent = false, isVoid = false, ignoreFirstLf = false, preventNamespaceInheritance = false } = {}) {\n        this.closedByChildren = {};\n        this.closedByParent = false;\n        this.canSelfClose = false;\n        if (closedByChildren && closedByChildren.length > 0) {\n            closedByChildren.forEach(tagName => this.closedByChildren[tagName] = true);\n        }\n        this.isVoid = isVoid;\n        this.closedByParent = closedByParent || isVoid;\n        this.implicitNamespacePrefix = implicitNamespacePrefix || null;\n        this.contentType = contentType;\n        this.ignoreFirstLf = ignoreFirstLf;\n        this.preventNamespaceInheritance = preventNamespaceInheritance;\n    }\n    isClosedByChild(name) {\n        return this.isVoid || name.toLowerCase() in this.closedByChildren;\n    }\n}\nlet _DEFAULT_TAG_DEFINITION;\n// see http://www.w3.org/TR/html51/syntax.html#optional-tags\n// This implementation does not fully conform to the HTML5 spec.\nlet TAG_DEFINITIONS;\nfunction getHtmlTagDefinition(tagName) {\n    var _a, _b;\n    if (!TAG_DEFINITIONS) {\n        _DEFAULT_TAG_DEFINITION = new HtmlTagDefinition();\n        TAG_DEFINITIONS = {\n            'base': new HtmlTagDefinition({ isVoid: true }),\n            'meta': new HtmlTagDefinition({ isVoid: true }),\n            'area': new HtmlTagDefinition({ isVoid: true }),\n            'embed': new HtmlTagDefinition({ isVoid: true }),\n            'link': new HtmlTagDefinition({ isVoid: true }),\n            'img': new HtmlTagDefinition({ isVoid: true }),\n            'input': new HtmlTagDefinition({ isVoid: true }),\n            'param': new HtmlTagDefinition({ isVoid: true }),\n            'hr': new HtmlTagDefinition({ isVoid: true }),\n            'br': new HtmlTagDefinition({ isVoid: true }),\n            'source': new HtmlTagDefinition({ isVoid: true }),\n            'track': new HtmlTagDefinition({ isVoid: true }),\n            'wbr': new HtmlTagDefinition({ isVoid: true }),\n            'p': new HtmlTagDefinition({\n                closedByChildren: [\n                    'address', 'article', 'aside', 'blockquote', 'div', 'dl', 'fieldset',\n                    'footer', 'form', 'h1', 'h2', 'h3', 'h4', 'h5',\n                    'h6', 'header', 'hgroup', 'hr', 'main', 'nav', 'ol',\n                    'p', 'pre', 'section', 'table', 'ul'\n                ],\n                closedByParent: true\n            }),\n            'thead': new HtmlTagDefinition({ closedByChildren: ['tbody', 'tfoot'] }),\n            'tbody': new HtmlTagDefinition({ closedByChildren: ['tbody', 'tfoot'], closedByParent: true }),\n            'tfoot': new HtmlTagDefinition({ closedByChildren: ['tbody'], closedByParent: true }),\n            'tr': new HtmlTagDefinition({ closedByChildren: ['tr'], closedByParent: true }),\n            'td': new HtmlTagDefinition({ closedByChildren: ['td', 'th'], closedByParent: true }),\n            'th': new HtmlTagDefinition({ closedByChildren: ['td', 'th'], closedByParent: true }),\n            'col': new HtmlTagDefinition({ isVoid: true }),\n            'svg': new HtmlTagDefinition({ implicitNamespacePrefix: 'svg' }),\n            'foreignObject': new HtmlTagDefinition({\n                // Usually the implicit namespace here would be redundant since it will be inherited from\n                // the parent `svg`, but we have to do it for `foreignObject`, because the way the parser\n                // works is that the parent node of an end tag is its own start tag which means that\n                // the `preventNamespaceInheritance` on `foreignObject` would have it default to the\n                // implicit namespace which is `html`, unless specified otherwise.\n                implicitNamespacePrefix: 'svg',\n                // We want to prevent children of foreignObject from inheriting its namespace, because\n                // the point of the element is to allow nodes from other namespaces to be inserted.\n                preventNamespaceInheritance: true,\n            }),\n            'math': new HtmlTagDefinition({ implicitNamespacePrefix: 'math' }),\n            'li': new HtmlTagDefinition({ closedByChildren: ['li'], closedByParent: true }),\n            'dt': new HtmlTagDefinition({ closedByChildren: ['dt', 'dd'] }),\n            'dd': new HtmlTagDefinition({ closedByChildren: ['dt', 'dd'], closedByParent: true }),\n            'rb': new HtmlTagDefinition({ closedByChildren: ['rb', 'rt', 'rtc', 'rp'], closedByParent: true }),\n            'rt': new HtmlTagDefinition({ closedByChildren: ['rb', 'rt', 'rtc', 'rp'], closedByParent: true }),\n            'rtc': new HtmlTagDefinition({ closedByChildren: ['rb', 'rtc', 'rp'], closedByParent: true }),\n            'rp': new HtmlTagDefinition({ closedByChildren: ['rb', 'rt', 'rtc', 'rp'], closedByParent: true }),\n            'optgroup': new HtmlTagDefinition({ closedByChildren: ['optgroup'], closedByParent: true }),\n            'option': new HtmlTagDefinition({ closedByChildren: ['option', 'optgroup'], closedByParent: true }),\n            'pre': new HtmlTagDefinition({ ignoreFirstLf: true }),\n            'listing': new HtmlTagDefinition({ ignoreFirstLf: true }),\n            'style': new HtmlTagDefinition({ contentType: TagContentType.RAW_TEXT }),\n            'script': new HtmlTagDefinition({ contentType: TagContentType.RAW_TEXT }),\n            'title': new HtmlTagDefinition({ contentType: TagContentType.ESCAPABLE_RAW_TEXT }),\n            'textarea': new HtmlTagDefinition({ contentType: TagContentType.ESCAPABLE_RAW_TEXT, ignoreFirstLf: true }),\n        };\n    }\n    // We have to make both a case-sensitive and a case-insesitive lookup, because\n    // HTML tag names are case insensitive, whereas some SVG tags are case sensitive.\n    return (_b = (_a = TAG_DEFINITIONS[tagName]) !== null && _a !== void 0 ? _a : TAG_DEFINITIONS[tagName.toLowerCase()]) !== null && _b !== void 0 ? _b : _DEFAULT_TAG_DEFINITION;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst _SELECTOR_REGEXP = new RegExp('(\\\\:not\\\\()|' + // 1: \":not(\"\n    '(([\\\\.\\\\#]?)[-\\\\w]+)|' + // 2: \"tag\"; 3: \".\"/\"#\";\n    // \"-\" should appear first in the regexp below as FF31 parses \"[.-\\w]\" as a range\n    // 4: attribute; 5: attribute_string; 6: attribute_value\n    '(?:\\\\[([-.\\\\w*]+)(?:=([\\\"\\']?)([^\\\\]\\\"\\']*)\\\\5)?\\\\])|' + // \"[name]\", \"[name=value]\",\n    // \"[name=\"value\"]\",\n    // \"[name='value']\"\n    '(\\\\))|' + // 7: \")\"\n    '(\\\\s*,\\\\s*)', // 8: \",\"\n'g');\n/**\n * A css selector contains an element name,\n * css classes and attribute/value pairs with the purpose\n * of selecting subsets out of them.\n */\nclass CssSelector {\n    constructor() {\n        this.element = null;\n        this.classNames = [];\n        /**\n         * The selectors are encoded in pairs where:\n         * - even locations are attribute names\n         * - odd locations are attribute values.\n         *\n         * Example:\n         * Selector: `[key1=value1][key2]` would parse to:\n         * ```\n         * ['key1', 'value1', 'key2', '']\n         * ```\n         */\n        this.attrs = [];\n        this.notSelectors = [];\n    }\n    static parse(selector) {\n        const results = [];\n        const _addResult = (res, cssSel) => {\n            if (cssSel.notSelectors.length > 0 && !cssSel.element && cssSel.classNames.length == 0 &&\n                cssSel.attrs.length == 0) {\n                cssSel.element = '*';\n            }\n            res.push(cssSel);\n        };\n        let cssSelector = new CssSelector();\n        let match;\n        let current = cssSelector;\n        let inNot = false;\n        _SELECTOR_REGEXP.lastIndex = 0;\n        while (match = _SELECTOR_REGEXP.exec(selector)) {\n            if (match[1 /* NOT */]) {\n                if (inNot) {\n                    throw new Error('Nesting :not in a selector is not allowed');\n                }\n                inNot = true;\n                current = new CssSelector();\n                cssSelector.notSelectors.push(current);\n            }\n            const tag = match[2 /* TAG */];\n            if (tag) {\n                const prefix = match[3 /* PREFIX */];\n                if (prefix === '#') {\n                    // #hash\n                    current.addAttribute('id', tag.substr(1));\n                }\n                else if (prefix === '.') {\n                    // Class\n                    current.addClassName(tag.substr(1));\n                }\n                else {\n                    // Element\n                    current.setElement(tag);\n                }\n            }\n            const attribute = match[4 /* ATTRIBUTE */];\n            if (attribute) {\n                current.addAttribute(attribute, match[6 /* ATTRIBUTE_VALUE */]);\n            }\n            if (match[7 /* NOT_END */]) {\n                inNot = false;\n                current = cssSelector;\n            }\n            if (match[8 /* SEPARATOR */]) {\n                if (inNot) {\n                    throw new Error('Multiple selectors in :not are not supported');\n                }\n                _addResult(results, cssSelector);\n                cssSelector = current = new CssSelector();\n            }\n        }\n        _addResult(results, cssSelector);\n        return results;\n    }\n    isElementSelector() {\n        return this.hasElementSelector() && this.classNames.length == 0 && this.attrs.length == 0 &&\n            this.notSelectors.length === 0;\n    }\n    hasElementSelector() {\n        return !!this.element;\n    }\n    setElement(element = null) {\n        this.element = element;\n    }\n    /** Gets a template string for an element that matches the selector. */\n    getMatchingElementTemplate() {\n        const tagName = this.element || 'div';\n        const classAttr = this.classNames.length > 0 ? ` class=\"${this.classNames.join(' ')}\"` : '';\n        let attrs = '';\n        for (let i = 0; i < this.attrs.length; i += 2) {\n            const attrName = this.attrs[i];\n            const attrValue = this.attrs[i + 1] !== '' ? `=\"${this.attrs[i + 1]}\"` : '';\n            attrs += ` ${attrName}${attrValue}`;\n        }\n        return getHtmlTagDefinition(tagName).isVoid ? `<${tagName}${classAttr}${attrs}/>` :\n            `<${tagName}${classAttr}${attrs}></${tagName}>`;\n    }\n    getAttrs() {\n        const result = [];\n        if (this.classNames.length > 0) {\n            result.push('class', this.classNames.join(' '));\n        }\n        return result.concat(this.attrs);\n    }\n    addAttribute(name, value = '') {\n        this.attrs.push(name, value && value.toLowerCase() || '');\n    }\n    addClassName(name) {\n        this.classNames.push(name.toLowerCase());\n    }\n    toString() {\n        let res = this.element || '';\n        if (this.classNames) {\n            this.classNames.forEach(klass => res += `.${klass}`);\n        }\n        if (this.attrs) {\n            for (let i = 0; i < this.attrs.length; i += 2) {\n                const name = this.attrs[i];\n                const value = this.attrs[i + 1];\n                res += `[${name}${value ? '=' + value : ''}]`;\n            }\n        }\n        this.notSelectors.forEach(notSelector => res += `:not(${notSelector})`);\n        return res;\n    }\n}\n/**\n * Reads a list of CssSelectors and allows to calculate which ones\n * are contained in a given CssSelector.\n */\nclass SelectorMatcher {\n    constructor() {\n        this._elementMap = new Map();\n        this._elementPartialMap = new Map();\n        this._classMap = new Map();\n        this._classPartialMap = new Map();\n        this._attrValueMap = new Map();\n        this._attrValuePartialMap = new Map();\n        this._listContexts = [];\n    }\n    static createNotMatcher(notSelectors) {\n        const notMatcher = new SelectorMatcher();\n        notMatcher.addSelectables(notSelectors, null);\n        return notMatcher;\n    }\n    addSelectables(cssSelectors, callbackCtxt) {\n        let listContext = null;\n        if (cssSelectors.length > 1) {\n            listContext = new SelectorListContext(cssSelectors);\n            this._listContexts.push(listContext);\n        }\n        for (let i = 0; i < cssSelectors.length; i++) {\n            this._addSelectable(cssSelectors[i], callbackCtxt, listContext);\n        }\n    }\n    /**\n     * Add an object that can be found later on by calling `match`.\n     * @param cssSelector A css selector\n     * @param callbackCtxt An opaque object that will be given to the callback of the `match` function\n     */\n    _addSelectable(cssSelector, callbackCtxt, listContext) {\n        let matcher = this;\n        const element = cssSelector.element;\n        const classNames = cssSelector.classNames;\n        const attrs = cssSelector.attrs;\n        const selectable = new SelectorContext(cssSelector, callbackCtxt, listContext);\n        if (element) {\n            const isTerminal = attrs.length === 0 && classNames.length === 0;\n            if (isTerminal) {\n                this._addTerminal(matcher._elementMap, element, selectable);\n            }\n            else {\n                matcher = this._addPartial(matcher._elementPartialMap, element);\n            }\n        }\n        if (classNames) {\n            for (let i = 0; i < classNames.length; i++) {\n                const isTerminal = attrs.length === 0 && i === classNames.length - 1;\n                const className = classNames[i];\n                if (isTerminal) {\n                    this._addTerminal(matcher._classMap, className, selectable);\n                }\n                else {\n                    matcher = this._addPartial(matcher._classPartialMap, className);\n                }\n            }\n        }\n        if (attrs) {\n            for (let i = 0; i < attrs.length; i += 2) {\n                const isTerminal = i === attrs.length - 2;\n                const name = attrs[i];\n                const value = attrs[i + 1];\n                if (isTerminal) {\n                    const terminalMap = matcher._attrValueMap;\n                    let terminalValuesMap = terminalMap.get(name);\n                    if (!terminalValuesMap) {\n                        terminalValuesMap = new Map();\n                        terminalMap.set(name, terminalValuesMap);\n                    }\n                    this._addTerminal(terminalValuesMap, value, selectable);\n                }\n                else {\n                    const partialMap = matcher._attrValuePartialMap;\n                    let partialValuesMap = partialMap.get(name);\n                    if (!partialValuesMap) {\n                        partialValuesMap = new Map();\n                        partialMap.set(name, partialValuesMap);\n                    }\n                    matcher = this._addPartial(partialValuesMap, value);\n                }\n            }\n        }\n    }\n    _addTerminal(map, name, selectable) {\n        let terminalList = map.get(name);\n        if (!terminalList) {\n            terminalList = [];\n            map.set(name, terminalList);\n        }\n        terminalList.push(selectable);\n    }\n    _addPartial(map, name) {\n        let matcher = map.get(name);\n        if (!matcher) {\n            matcher = new SelectorMatcher();\n            map.set(name, matcher);\n        }\n        return matcher;\n    }\n    /**\n     * Find the objects that have been added via `addSelectable`\n     * whose css selector is contained in the given css selector.\n     * @param cssSelector A css selector\n     * @param matchedCallback This callback will be called with the object handed into `addSelectable`\n     * @return boolean true if a match was found\n     */\n    match(cssSelector, matchedCallback) {\n        let result = false;\n        const element = cssSelector.element;\n        const classNames = cssSelector.classNames;\n        const attrs = cssSelector.attrs;\n        for (let i = 0; i < this._listContexts.length; i++) {\n            this._listContexts[i].alreadyMatched = false;\n        }\n        result = this._matchTerminal(this._elementMap, element, cssSelector, matchedCallback) || result;\n        result = this._matchPartial(this._elementPartialMap, element, cssSelector, matchedCallback) ||\n            result;\n        if (classNames) {\n            for (let i = 0; i < classNames.length; i++) {\n                const className = classNames[i];\n                result =\n                    this._matchTerminal(this._classMap, className, cssSelector, matchedCallback) || result;\n                result =\n                    this._matchPartial(this._classPartialMap, className, cssSelector, matchedCallback) ||\n                        result;\n            }\n        }\n        if (attrs) {\n            for (let i = 0; i < attrs.length; i += 2) {\n                const name = attrs[i];\n                const value = attrs[i + 1];\n                const terminalValuesMap = this._attrValueMap.get(name);\n                if (value) {\n                    result =\n                        this._matchTerminal(terminalValuesMap, '', cssSelector, matchedCallback) || result;\n                }\n                result =\n                    this._matchTerminal(terminalValuesMap, value, cssSelector, matchedCallback) || result;\n                const partialValuesMap = this._attrValuePartialMap.get(name);\n                if (value) {\n                    result = this._matchPartial(partialValuesMap, '', cssSelector, matchedCallback) || result;\n                }\n                result =\n                    this._matchPartial(partialValuesMap, value, cssSelector, matchedCallback) || result;\n            }\n        }\n        return result;\n    }\n    /** @internal */\n    _matchTerminal(map, name, cssSelector, matchedCallback) {\n        if (!map || typeof name !== 'string') {\n            return false;\n        }\n        let selectables = map.get(name) || [];\n        const starSelectables = map.get('*');\n        if (starSelectables) {\n            selectables = selectables.concat(starSelectables);\n        }\n        if (selectables.length === 0) {\n            return false;\n        }\n        let selectable;\n        let result = false;\n        for (let i = 0; i < selectables.length; i++) {\n            selectable = selectables[i];\n            result = selectable.finalize(cssSelector, matchedCallback) || result;\n        }\n        return result;\n    }\n    /** @internal */\n    _matchPartial(map, name, cssSelector, matchedCallback) {\n        if (!map || typeof name !== 'string') {\n            return false;\n        }\n        const nestedSelector = map.get(name);\n        if (!nestedSelector) {\n            return false;\n        }\n        // TODO(perf): get rid of recursion and measure again\n        // TODO(perf): don't pass the whole selector into the recursion,\n        // but only the not processed parts\n        return nestedSelector.match(cssSelector, matchedCallback);\n    }\n}\nclass SelectorListContext {\n    constructor(selectors) {\n        this.selectors = selectors;\n        this.alreadyMatched = false;\n    }\n}\n// Store context to pass back selector and context when a selector is matched\nclass SelectorContext {\n    constructor(selector, cbContext, listContext) {\n        this.selector = selector;\n        this.cbContext = cbContext;\n        this.listContext = listContext;\n        this.notSelectors = selector.notSelectors;\n    }\n    finalize(cssSelector, callback) {\n        let result = true;\n        if (this.notSelectors.length > 0 && (!this.listContext || !this.listContext.alreadyMatched)) {\n            const notMatcher = SelectorMatcher.createNotMatcher(this.notSelectors);\n            result = !notMatcher.match(cssSelector, null);\n        }\n        if (result && callback && (!this.listContext || !this.listContext.alreadyMatched)) {\n            if (this.listContext) {\n                this.listContext.alreadyMatched = true;\n            }\n            callback(this.selector, this.cbContext);\n        }\n        return result;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst createInject = makeMetadataFactory('Inject', (token) => ({ token }));\nconst createInjectionToken = makeMetadataFactory('InjectionToken', (desc) => ({ _desc: desc, ɵprov: undefined }));\nconst createAttribute = makeMetadataFactory('Attribute', (attributeName) => ({ attributeName }));\nconst createContentChildren = makeMetadataFactory('ContentChildren', (selector, data = {}) => (Object.assign({ selector, first: false, isViewQuery: false, descendants: false }, data)));\nconst createContentChild = makeMetadataFactory('ContentChild', (selector, data = {}) => (Object.assign({ selector, first: true, isViewQuery: false, descendants: true }, data)));\nconst createViewChildren = makeMetadataFactory('ViewChildren', (selector, data = {}) => (Object.assign({ selector, first: false, isViewQuery: true, descendants: true }, data)));\nconst createViewChild = makeMetadataFactory('ViewChild', (selector, data) => (Object.assign({ selector, first: true, isViewQuery: true, descendants: true }, data)));\nconst createDirective = makeMetadataFactory('Directive', (dir = {}) => dir);\nvar ViewEncapsulation;\n(function (ViewEncapsulation) {\n    ViewEncapsulation[ViewEncapsulation[\"Emulated\"] = 0] = \"Emulated\";\n    ViewEncapsulation[ViewEncapsulation[\"Native\"] = 1] = \"Native\";\n    ViewEncapsulation[ViewEncapsulation[\"None\"] = 2] = \"None\";\n    ViewEncapsulation[ViewEncapsulation[\"ShadowDom\"] = 3] = \"ShadowDom\";\n})(ViewEncapsulation || (ViewEncapsulation = {}));\nvar ChangeDetectionStrategy;\n(function (ChangeDetectionStrategy) {\n    ChangeDetectionStrategy[ChangeDetectionStrategy[\"OnPush\"] = 0] = \"OnPush\";\n    ChangeDetectionStrategy[ChangeDetectionStrategy[\"Default\"] = 1] = \"Default\";\n})(ChangeDetectionStrategy || (ChangeDetectionStrategy = {}));\nconst createComponent = makeMetadataFactory('Component', (c = {}) => (Object.assign({ changeDetection: ChangeDetectionStrategy.Default }, c)));\nconst createPipe = makeMetadataFactory('Pipe', (p) => (Object.assign({ pure: true }, p)));\nconst createInput = makeMetadataFactory('Input', (bindingPropertyName) => ({ bindingPropertyName }));\nconst createOutput = makeMetadataFactory('Output', (bindingPropertyName) => ({ bindingPropertyName }));\nconst createHostBinding = makeMetadataFactory('HostBinding', (hostPropertyName) => ({ hostPropertyName }));\nconst createHostListener = makeMetadataFactory('HostListener', (eventName, args) => ({ eventName, args }));\nconst createNgModule = makeMetadataFactory('NgModule', (ngModule) => ngModule);\nconst createInjectable = makeMetadataFactory('Injectable', (injectable = {}) => injectable);\nconst CUSTOM_ELEMENTS_SCHEMA = {\n    name: 'custom-elements'\n};\nconst NO_ERRORS_SCHEMA = {\n    name: 'no-errors-schema'\n};\nconst createOptional = makeMetadataFactory('Optional');\nconst createSelf = makeMetadataFactory('Self');\nconst createSkipSelf = makeMetadataFactory('SkipSelf');\nconst createHost = makeMetadataFactory('Host');\nconst Type = Function;\nvar SecurityContext;\n(function (SecurityContext) {\n    SecurityContext[SecurityContext[\"NONE\"] = 0] = \"NONE\";\n    SecurityContext[SecurityContext[\"HTML\"] = 1] = \"HTML\";\n    SecurityContext[SecurityContext[\"STYLE\"] = 2] = \"STYLE\";\n    SecurityContext[SecurityContext[\"SCRIPT\"] = 3] = \"SCRIPT\";\n    SecurityContext[SecurityContext[\"URL\"] = 4] = \"URL\";\n    SecurityContext[SecurityContext[\"RESOURCE_URL\"] = 5] = \"RESOURCE_URL\";\n})(SecurityContext || (SecurityContext = {}));\nvar MissingTranslationStrategy;\n(function (MissingTranslationStrategy) {\n    MissingTranslationStrategy[MissingTranslationStrategy[\"Error\"] = 0] = \"Error\";\n    MissingTranslationStrategy[MissingTranslationStrategy[\"Warning\"] = 1] = \"Warning\";\n    MissingTranslationStrategy[MissingTranslationStrategy[\"Ignore\"] = 2] = \"Ignore\";\n})(MissingTranslationStrategy || (MissingTranslationStrategy = {}));\nfunction makeMetadataFactory(name, props) {\n    // This must be declared as a function, not a fat arrow, so that ES2015 devmode produces code\n    // that works with the static_reflector.ts in the ViewEngine compiler.\n    // In particular, `_registerDecoratorOrConstructor` assumes that the value returned here can be\n    // new'ed.\n    function factory(...args) {\n        const values = props ? props(...args) : {};\n        return Object.assign({ ngMetadataName: name }, values);\n    }\n    factory.isTypeOf = (obj) => obj && obj.ngMetadataName === name;\n    factory.ngMetadataName = name;\n    return factory;\n}\nfunction parserSelectorToSimpleSelector(selector) {\n    const classes = selector.classNames && selector.classNames.length ?\n        [8 /* CLASS */, ...selector.classNames] :\n        [];\n    const elementName = selector.element && selector.element !== '*' ? selector.element : '';\n    return [elementName, ...selector.attrs, ...classes];\n}\nfunction parserSelectorToNegativeSelector(selector) {\n    const classes = selector.classNames && selector.classNames.length ?\n        [8 /* CLASS */, ...selector.classNames] :\n        [];\n    if (selector.element) {\n        return [\n            1 /* NOT */ | 4 /* ELEMENT */, selector.element, ...selector.attrs, ...classes\n        ];\n    }\n    else if (selector.attrs.length) {\n        return [1 /* NOT */ | 2 /* ATTRIBUTE */, ...selector.attrs, ...classes];\n    }\n    else {\n        return selector.classNames && selector.classNames.length ?\n            [1 /* NOT */ | 8 /* CLASS */, ...selector.classNames] :\n            [];\n    }\n}\nfunction parserSelectorToR3Selector(selector) {\n    const positive = parserSelectorToSimpleSelector(selector);\n    const negative = selector.notSelectors && selector.notSelectors.length ?\n        selector.notSelectors.map(notSelector => parserSelectorToNegativeSelector(notSelector)) :\n        [];\n    return positive.concat(...negative);\n}\nfunction parseSelectorToR3Selector(selector) {\n    return selector ? CssSelector.parse(selector).map(parserSelectorToR3Selector) : [];\n}\n\nvar core = /*#__PURE__*/Object.freeze({\n    __proto__: null,\n    createInject: createInject,\n    createInjectionToken: createInjectionToken,\n    createAttribute: createAttribute,\n    createContentChildren: createContentChildren,\n    createContentChild: createContentChild,\n    createViewChildren: createViewChildren,\n    createViewChild: createViewChild,\n    createDirective: createDirective,\n    get ViewEncapsulation () { return ViewEncapsulation; },\n    get ChangeDetectionStrategy () { return ChangeDetectionStrategy; },\n    createComponent: createComponent,\n    createPipe: createPipe,\n    createInput: createInput,\n    createOutput: createOutput,\n    createHostBinding: createHostBinding,\n    createHostListener: createHostListener,\n    createNgModule: createNgModule,\n    createInjectable: createInjectable,\n    CUSTOM_ELEMENTS_SCHEMA: CUSTOM_ELEMENTS_SCHEMA,\n    NO_ERRORS_SCHEMA: NO_ERRORS_SCHEMA,\n    createOptional: createOptional,\n    createSelf: createSelf,\n    createSkipSelf: createSkipSelf,\n    createHost: createHost,\n    Type: Type,\n    get SecurityContext () { return SecurityContext; },\n    get MissingTranslationStrategy () { return MissingTranslationStrategy; },\n    parseSelectorToR3Selector: parseSelectorToR3Selector\n});\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n//// Types\nvar TypeModifier;\n(function (TypeModifier) {\n    TypeModifier[TypeModifier[\"Const\"] = 0] = \"Const\";\n})(TypeModifier || (TypeModifier = {}));\nclass Type$1 {\n    constructor(modifiers = []) {\n        this.modifiers = modifiers;\n    }\n    hasModifier(modifier) {\n        return this.modifiers.indexOf(modifier) !== -1;\n    }\n}\nvar BuiltinTypeName;\n(function (BuiltinTypeName) {\n    BuiltinTypeName[BuiltinTypeName[\"Dynamic\"] = 0] = \"Dynamic\";\n    BuiltinTypeName[BuiltinTypeName[\"Bool\"] = 1] = \"Bool\";\n    BuiltinTypeName[BuiltinTypeName[\"String\"] = 2] = \"String\";\n    BuiltinTypeName[BuiltinTypeName[\"Int\"] = 3] = \"Int\";\n    BuiltinTypeName[BuiltinTypeName[\"Number\"] = 4] = \"Number\";\n    BuiltinTypeName[BuiltinTypeName[\"Function\"] = 5] = \"Function\";\n    BuiltinTypeName[BuiltinTypeName[\"Inferred\"] = 6] = \"Inferred\";\n    BuiltinTypeName[BuiltinTypeName[\"None\"] = 7] = \"None\";\n})(BuiltinTypeName || (BuiltinTypeName = {}));\nclass BuiltinType extends Type$1 {\n    constructor(name, modifiers) {\n        super(modifiers);\n        this.name = name;\n    }\n    visitType(visitor, context) {\n        return visitor.visitBuiltinType(this, context);\n    }\n}\nclass ExpressionType extends Type$1 {\n    constructor(value, modifiers, typeParams = null) {\n        super(modifiers);\n        this.value = value;\n        this.typeParams = typeParams;\n    }\n    visitType(visitor, context) {\n        return visitor.visitExpressionType(this, context);\n    }\n}\nclass ArrayType extends Type$1 {\n    constructor(of, modifiers) {\n        super(modifiers);\n        this.of = of;\n    }\n    visitType(visitor, context) {\n        return visitor.visitArrayType(this, context);\n    }\n}\nclass MapType extends Type$1 {\n    constructor(valueType, modifiers) {\n        super(modifiers);\n        this.valueType = valueType || null;\n    }\n    visitType(visitor, context) {\n        return visitor.visitMapType(this, context);\n    }\n}\nconst DYNAMIC_TYPE = new BuiltinType(BuiltinTypeName.Dynamic);\nconst INFERRED_TYPE = new BuiltinType(BuiltinTypeName.Inferred);\nconst BOOL_TYPE = new BuiltinType(BuiltinTypeName.Bool);\nconst INT_TYPE = new BuiltinType(BuiltinTypeName.Int);\nconst NUMBER_TYPE = new BuiltinType(BuiltinTypeName.Number);\nconst STRING_TYPE = new BuiltinType(BuiltinTypeName.String);\nconst FUNCTION_TYPE = new BuiltinType(BuiltinTypeName.Function);\nconst NONE_TYPE = new BuiltinType(BuiltinTypeName.None);\n///// Expressions\nvar UnaryOperator;\n(function (UnaryOperator) {\n    UnaryOperator[UnaryOperator[\"Minus\"] = 0] = \"Minus\";\n    UnaryOperator[UnaryOperator[\"Plus\"] = 1] = \"Plus\";\n})(UnaryOperator || (UnaryOperator = {}));\nvar BinaryOperator;\n(function (BinaryOperator) {\n    BinaryOperator[BinaryOperator[\"Equals\"] = 0] = \"Equals\";\n    BinaryOperator[BinaryOperator[\"NotEquals\"] = 1] = \"NotEquals\";\n    BinaryOperator[BinaryOperator[\"Identical\"] = 2] = \"Identical\";\n    BinaryOperator[BinaryOperator[\"NotIdentical\"] = 3] = \"NotIdentical\";\n    BinaryOperator[BinaryOperator[\"Minus\"] = 4] = \"Minus\";\n    BinaryOperator[BinaryOperator[\"Plus\"] = 5] = \"Plus\";\n    BinaryOperator[BinaryOperator[\"Divide\"] = 6] = \"Divide\";\n    BinaryOperator[BinaryOperator[\"Multiply\"] = 7] = \"Multiply\";\n    BinaryOperator[BinaryOperator[\"Modulo\"] = 8] = \"Modulo\";\n    BinaryOperator[BinaryOperator[\"And\"] = 9] = \"And\";\n    BinaryOperator[BinaryOperator[\"Or\"] = 10] = \"Or\";\n    BinaryOperator[BinaryOperator[\"BitwiseAnd\"] = 11] = \"BitwiseAnd\";\n    BinaryOperator[BinaryOperator[\"Lower\"] = 12] = \"Lower\";\n    BinaryOperator[BinaryOperator[\"LowerEquals\"] = 13] = \"LowerEquals\";\n    BinaryOperator[BinaryOperator[\"Bigger\"] = 14] = \"Bigger\";\n    BinaryOperator[BinaryOperator[\"BiggerEquals\"] = 15] = \"BiggerEquals\";\n})(BinaryOperator || (BinaryOperator = {}));\nfunction nullSafeIsEquivalent(base, other) {\n    if (base == null || other == null) {\n        return base == other;\n    }\n    return base.isEquivalent(other);\n}\nfunction areAllEquivalent(base, other) {\n    const len = base.length;\n    if (len !== other.length) {\n        return false;\n    }\n    for (let i = 0; i < len; i++) {\n        if (!base[i].isEquivalent(other[i])) {\n            return false;\n        }\n    }\n    return true;\n}\nclass Expression {\n    constructor(type, sourceSpan) {\n        this.type = type || null;\n        this.sourceSpan = sourceSpan || null;\n    }\n    prop(name, sourceSpan) {\n        return new ReadPropExpr(this, name, null, sourceSpan);\n    }\n    key(index, type, sourceSpan) {\n        return new ReadKeyExpr(this, index, type, sourceSpan);\n    }\n    callMethod(name, params, sourceSpan) {\n        return new InvokeMethodExpr(this, name, params, null, sourceSpan);\n    }\n    callFn(params, sourceSpan, pure) {\n        return new InvokeFunctionExpr(this, params, null, sourceSpan, pure);\n    }\n    instantiate(params, type, sourceSpan) {\n        return new InstantiateExpr(this, params, type, sourceSpan);\n    }\n    conditional(trueCase, falseCase = null, sourceSpan) {\n        return new ConditionalExpr(this, trueCase, falseCase, null, sourceSpan);\n    }\n    equals(rhs, sourceSpan) {\n        return new BinaryOperatorExpr(BinaryOperator.Equals, this, rhs, null, sourceSpan);\n    }\n    notEquals(rhs, sourceSpan) {\n        return new BinaryOperatorExpr(BinaryOperator.NotEquals, this, rhs, null, sourceSpan);\n    }\n    identical(rhs, sourceSpan) {\n        return new BinaryOperatorExpr(BinaryOperator.Identical, this, rhs, null, sourceSpan);\n    }\n    notIdentical(rhs, sourceSpan) {\n        return new BinaryOperatorExpr(BinaryOperator.NotIdentical, this, rhs, null, sourceSpan);\n    }\n    minus(rhs, sourceSpan) {\n        return new BinaryOperatorExpr(BinaryOperator.Minus, this, rhs, null, sourceSpan);\n    }\n    plus(rhs, sourceSpan) {\n        return new BinaryOperatorExpr(BinaryOperator.Plus, this, rhs, null, sourceSpan);\n    }\n    divide(rhs, sourceSpan) {\n        return new BinaryOperatorExpr(BinaryOperator.Divide, this, rhs, null, sourceSpan);\n    }\n    multiply(rhs, sourceSpan) {\n        return new BinaryOperatorExpr(BinaryOperator.Multiply, this, rhs, null, sourceSpan);\n    }\n    modulo(rhs, sourceSpan) {\n        return new BinaryOperatorExpr(BinaryOperator.Modulo, this, rhs, null, sourceSpan);\n    }\n    and(rhs, sourceSpan) {\n        return new BinaryOperatorExpr(BinaryOperator.And, this, rhs, null, sourceSpan);\n    }\n    bitwiseAnd(rhs, sourceSpan, parens = true) {\n        return new BinaryOperatorExpr(BinaryOperator.BitwiseAnd, this, rhs, null, sourceSpan, parens);\n    }\n    or(rhs, sourceSpan) {\n        return new BinaryOperatorExpr(BinaryOperator.Or, this, rhs, null, sourceSpan);\n    }\n    lower(rhs, sourceSpan) {\n        return new BinaryOperatorExpr(BinaryOperator.Lower, this, rhs, null, sourceSpan);\n    }\n    lowerEquals(rhs, sourceSpan) {\n        return new BinaryOperatorExpr(BinaryOperator.LowerEquals, this, rhs, null, sourceSpan);\n    }\n    bigger(rhs, sourceSpan) {\n        return new BinaryOperatorExpr(BinaryOperator.Bigger, this, rhs, null, sourceSpan);\n    }\n    biggerEquals(rhs, sourceSpan) {\n        return new BinaryOperatorExpr(BinaryOperator.BiggerEquals, this, rhs, null, sourceSpan);\n    }\n    isBlank(sourceSpan) {\n        // Note: We use equals by purpose here to compare to null and undefined in JS.\n        // We use the typed null to allow strictNullChecks to narrow types.\n        return this.equals(TYPED_NULL_EXPR, sourceSpan);\n    }\n    cast(type, sourceSpan) {\n        return new CastExpr(this, type, sourceSpan);\n    }\n    toStmt() {\n        return new ExpressionStatement(this, null);\n    }\n}\nvar BuiltinVar;\n(function (BuiltinVar) {\n    BuiltinVar[BuiltinVar[\"This\"] = 0] = \"This\";\n    BuiltinVar[BuiltinVar[\"Super\"] = 1] = \"Super\";\n    BuiltinVar[BuiltinVar[\"CatchError\"] = 2] = \"CatchError\";\n    BuiltinVar[BuiltinVar[\"CatchStack\"] = 3] = \"CatchStack\";\n})(BuiltinVar || (BuiltinVar = {}));\nclass ReadVarExpr extends Expression {\n    constructor(name, type, sourceSpan) {\n        super(type, sourceSpan);\n        if (typeof name === 'string') {\n            this.name = name;\n            this.builtin = null;\n        }\n        else {\n            this.name = null;\n            this.builtin = name;\n        }\n    }\n    isEquivalent(e) {\n        return e instanceof ReadVarExpr && this.name === e.name && this.builtin === e.builtin;\n    }\n    isConstant() {\n        return false;\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitReadVarExpr(this, context);\n    }\n    set(value) {\n        if (!this.name) {\n            throw new Error(`Built in variable ${this.builtin} can not be assigned to.`);\n        }\n        return new WriteVarExpr(this.name, value, null, this.sourceSpan);\n    }\n}\nclass TypeofExpr extends Expression {\n    constructor(expr, type, sourceSpan) {\n        super(type, sourceSpan);\n        this.expr = expr;\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitTypeofExpr(this, context);\n    }\n    isEquivalent(e) {\n        return e instanceof TypeofExpr && e.expr.isEquivalent(this.expr);\n    }\n    isConstant() {\n        return this.expr.isConstant();\n    }\n}\nclass WrappedNodeExpr extends Expression {\n    constructor(node, type, sourceSpan) {\n        super(type, sourceSpan);\n        this.node = node;\n    }\n    isEquivalent(e) {\n        return e instanceof WrappedNodeExpr && this.node === e.node;\n    }\n    isConstant() {\n        return false;\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitWrappedNodeExpr(this, context);\n    }\n}\nclass WriteVarExpr extends Expression {\n    constructor(name, value, type, sourceSpan) {\n        super(type || value.type, sourceSpan);\n        this.name = name;\n        this.value = value;\n    }\n    isEquivalent(e) {\n        return e instanceof WriteVarExpr && this.name === e.name && this.value.isEquivalent(e.value);\n    }\n    isConstant() {\n        return false;\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitWriteVarExpr(this, context);\n    }\n    toDeclStmt(type, modifiers) {\n        return new DeclareVarStmt(this.name, this.value, type, modifiers, this.sourceSpan);\n    }\n    toConstDecl() {\n        return this.toDeclStmt(INFERRED_TYPE, [StmtModifier.Final]);\n    }\n}\nclass WriteKeyExpr extends Expression {\n    constructor(receiver, index, value, type, sourceSpan) {\n        super(type || value.type, sourceSpan);\n        this.receiver = receiver;\n        this.index = index;\n        this.value = value;\n    }\n    isEquivalent(e) {\n        return e instanceof WriteKeyExpr && this.receiver.isEquivalent(e.receiver) &&\n            this.index.isEquivalent(e.index) && this.value.isEquivalent(e.value);\n    }\n    isConstant() {\n        return false;\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitWriteKeyExpr(this, context);\n    }\n}\nclass WritePropExpr extends Expression {\n    constructor(receiver, name, value, type, sourceSpan) {\n        super(type || value.type, sourceSpan);\n        this.receiver = receiver;\n        this.name = name;\n        this.value = value;\n    }\n    isEquivalent(e) {\n        return e instanceof WritePropExpr && this.receiver.isEquivalent(e.receiver) &&\n            this.name === e.name && this.value.isEquivalent(e.value);\n    }\n    isConstant() {\n        return false;\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitWritePropExpr(this, context);\n    }\n}\nvar BuiltinMethod;\n(function (BuiltinMethod) {\n    BuiltinMethod[BuiltinMethod[\"ConcatArray\"] = 0] = \"ConcatArray\";\n    BuiltinMethod[BuiltinMethod[\"SubscribeObservable\"] = 1] = \"SubscribeObservable\";\n    BuiltinMethod[BuiltinMethod[\"Bind\"] = 2] = \"Bind\";\n})(BuiltinMethod || (BuiltinMethod = {}));\nclass InvokeMethodExpr extends Expression {\n    constructor(receiver, method, args, type, sourceSpan) {\n        super(type, sourceSpan);\n        this.receiver = receiver;\n        this.args = args;\n        if (typeof method === 'string') {\n            this.name = method;\n            this.builtin = null;\n        }\n        else {\n            this.name = null;\n            this.builtin = method;\n        }\n    }\n    isEquivalent(e) {\n        return e instanceof InvokeMethodExpr && this.receiver.isEquivalent(e.receiver) &&\n            this.name === e.name && this.builtin === e.builtin && areAllEquivalent(this.args, e.args);\n    }\n    isConstant() {\n        return false;\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitInvokeMethodExpr(this, context);\n    }\n}\nclass InvokeFunctionExpr extends Expression {\n    constructor(fn, args, type, sourceSpan, pure = false) {\n        super(type, sourceSpan);\n        this.fn = fn;\n        this.args = args;\n        this.pure = pure;\n    }\n    isEquivalent(e) {\n        return e instanceof InvokeFunctionExpr && this.fn.isEquivalent(e.fn) &&\n            areAllEquivalent(this.args, e.args) && this.pure === e.pure;\n    }\n    isConstant() {\n        return false;\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitInvokeFunctionExpr(this, context);\n    }\n}\nclass InstantiateExpr extends Expression {\n    constructor(classExpr, args, type, sourceSpan) {\n        super(type, sourceSpan);\n        this.classExpr = classExpr;\n        this.args = args;\n    }\n    isEquivalent(e) {\n        return e instanceof InstantiateExpr && this.classExpr.isEquivalent(e.classExpr) &&\n            areAllEquivalent(this.args, e.args);\n    }\n    isConstant() {\n        return false;\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitInstantiateExpr(this, context);\n    }\n}\nclass LiteralExpr extends Expression {\n    constructor(value, type, sourceSpan) {\n        super(type, sourceSpan);\n        this.value = value;\n    }\n    isEquivalent(e) {\n        return e instanceof LiteralExpr && this.value === e.value;\n    }\n    isConstant() {\n        return true;\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitLiteralExpr(this, context);\n    }\n}\nclass MessagePiece {\n    constructor(text, sourceSpan) {\n        this.text = text;\n        this.sourceSpan = sourceSpan;\n    }\n}\nclass LiteralPiece extends MessagePiece {\n}\nclass PlaceholderPiece extends MessagePiece {\n}\nclass LocalizedString extends Expression {\n    constructor(metaBlock, messageParts, placeHolderNames, expressions, sourceSpan) {\n        super(STRING_TYPE, sourceSpan);\n        this.metaBlock = metaBlock;\n        this.messageParts = messageParts;\n        this.placeHolderNames = placeHolderNames;\n        this.expressions = expressions;\n    }\n    isEquivalent(e) {\n        // return e instanceof LocalizedString && this.message === e.message;\n        return false;\n    }\n    isConstant() {\n        return false;\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitLocalizedString(this, context);\n    }\n    /**\n     * Serialize the given `meta` and `messagePart` into \"cooked\" and \"raw\" strings that can be used\n     * in a `$localize` tagged string. The format of the metadata is the same as that parsed by\n     * `parseI18nMeta()`.\n     *\n     * @param meta The metadata to serialize\n     * @param messagePart The first part of the tagged string\n     */\n    serializeI18nHead() {\n        const MEANING_SEPARATOR = '|';\n        const ID_SEPARATOR = '@@';\n        const LEGACY_ID_INDICATOR = '␟';\n        let metaBlock = this.metaBlock.description || '';\n        if (this.metaBlock.meaning) {\n            metaBlock = `${this.metaBlock.meaning}${MEANING_SEPARATOR}${metaBlock}`;\n        }\n        if (this.metaBlock.customId) {\n            metaBlock = `${metaBlock}${ID_SEPARATOR}${this.metaBlock.customId}`;\n        }\n        if (this.metaBlock.legacyIds) {\n            this.metaBlock.legacyIds.forEach(legacyId => {\n                metaBlock = `${metaBlock}${LEGACY_ID_INDICATOR}${legacyId}`;\n            });\n        }\n        return createCookedRawString(metaBlock, this.messageParts[0].text);\n    }\n    getMessagePartSourceSpan(i) {\n        var _a, _b;\n        return (_b = (_a = this.messageParts[i]) === null || _a === void 0 ? void 0 : _a.sourceSpan) !== null && _b !== void 0 ? _b : this.sourceSpan;\n    }\n    getPlaceholderSourceSpan(i) {\n        var _a, _b, _c, _d;\n        return (_d = (_b = (_a = this.placeHolderNames[i]) === null || _a === void 0 ? void 0 : _a.sourceSpan) !== null && _b !== void 0 ? _b : (_c = this.expressions[i]) === null || _c === void 0 ? void 0 : _c.sourceSpan) !== null && _d !== void 0 ? _d : this.sourceSpan;\n    }\n    /**\n     * Serialize the given `placeholderName` and `messagePart` into \"cooked\" and \"raw\" strings that\n     * can be used in a `$localize` tagged string.\n     *\n     * @param placeholderName The placeholder name to serialize\n     * @param messagePart The following message string after this placeholder\n     */\n    serializeI18nTemplatePart(partIndex) {\n        const placeholderName = this.placeHolderNames[partIndex - 1].text;\n        const messagePart = this.messageParts[partIndex];\n        return createCookedRawString(placeholderName, messagePart.text);\n    }\n}\nconst escapeSlashes = (str) => str.replace(/\\\\/g, '\\\\\\\\');\nconst escapeStartingColon = (str) => str.replace(/^:/, '\\\\:');\nconst escapeColons = (str) => str.replace(/:/g, '\\\\:');\nconst escapeForMessagePart = (str) => str.replace(/`/g, '\\\\`').replace(/\\${/g, '$\\\\{');\n/**\n * Creates a `{cooked, raw}` object from the `metaBlock` and `messagePart`.\n *\n * The `raw` text must have various character sequences escaped:\n * * \"\\\" would otherwise indicate that the next character is a control character.\n * * \"`\" and \"${\" are template string control sequences that would otherwise prematurely indicate\n *   the end of a message part.\n * * \":\" inside a metablock would prematurely indicate the end of the metablock.\n * * \":\" at the start of a messagePart with no metablock would erroneously indicate the start of a\n *   metablock.\n *\n * @param metaBlock Any metadata that should be prepended to the string\n * @param messagePart The message part of the string\n */\nfunction createCookedRawString(metaBlock, messagePart) {\n    if (metaBlock === '') {\n        return {\n            cooked: messagePart,\n            raw: escapeForMessagePart(escapeStartingColon(escapeSlashes(messagePart)))\n        };\n    }\n    else {\n        return {\n            cooked: `:${metaBlock}:${messagePart}`,\n            raw: escapeForMessagePart(`:${escapeColons(escapeSlashes(metaBlock))}:${escapeSlashes(messagePart)}`)\n        };\n    }\n}\nclass ExternalExpr extends Expression {\n    constructor(value, type, typeParams = null, sourceSpan) {\n        super(type, sourceSpan);\n        this.value = value;\n        this.typeParams = typeParams;\n    }\n    isEquivalent(e) {\n        return e instanceof ExternalExpr && this.value.name === e.value.name &&\n            this.value.moduleName === e.value.moduleName && this.value.runtime === e.value.runtime;\n    }\n    isConstant() {\n        return false;\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitExternalExpr(this, context);\n    }\n}\nclass ExternalReference {\n    constructor(moduleName, name, runtime) {\n        this.moduleName = moduleName;\n        this.name = name;\n        this.runtime = runtime;\n    }\n}\nclass ConditionalExpr extends Expression {\n    constructor(condition, trueCase, falseCase = null, type, sourceSpan) {\n        super(type || trueCase.type, sourceSpan);\n        this.condition = condition;\n        this.falseCase = falseCase;\n        this.trueCase = trueCase;\n    }\n    isEquivalent(e) {\n        return e instanceof ConditionalExpr && this.condition.isEquivalent(e.condition) &&\n            this.trueCase.isEquivalent(e.trueCase) && nullSafeIsEquivalent(this.falseCase, e.falseCase);\n    }\n    isConstant() {\n        return false;\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitConditionalExpr(this, context);\n    }\n}\nclass NotExpr extends Expression {\n    constructor(condition, sourceSpan) {\n        super(BOOL_TYPE, sourceSpan);\n        this.condition = condition;\n    }\n    isEquivalent(e) {\n        return e instanceof NotExpr && this.condition.isEquivalent(e.condition);\n    }\n    isConstant() {\n        return false;\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitNotExpr(this, context);\n    }\n}\nclass AssertNotNull extends Expression {\n    constructor(condition, sourceSpan) {\n        super(condition.type, sourceSpan);\n        this.condition = condition;\n    }\n    isEquivalent(e) {\n        return e instanceof AssertNotNull && this.condition.isEquivalent(e.condition);\n    }\n    isConstant() {\n        return false;\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitAssertNotNullExpr(this, context);\n    }\n}\nclass CastExpr extends Expression {\n    constructor(value, type, sourceSpan) {\n        super(type, sourceSpan);\n        this.value = value;\n    }\n    isEquivalent(e) {\n        return e instanceof CastExpr && this.value.isEquivalent(e.value);\n    }\n    isConstant() {\n        return false;\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitCastExpr(this, context);\n    }\n}\nclass FnParam {\n    constructor(name, type = null) {\n        this.name = name;\n        this.type = type;\n    }\n    isEquivalent(param) {\n        return this.name === param.name;\n    }\n}\nclass FunctionExpr extends Expression {\n    constructor(params, statements, type, sourceSpan, name) {\n        super(type, sourceSpan);\n        this.params = params;\n        this.statements = statements;\n        this.name = name;\n    }\n    isEquivalent(e) {\n        return e instanceof FunctionExpr && areAllEquivalent(this.params, e.params) &&\n            areAllEquivalent(this.statements, e.statements);\n    }\n    isConstant() {\n        return false;\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitFunctionExpr(this, context);\n    }\n    toDeclStmt(name, modifiers) {\n        return new DeclareFunctionStmt(name, this.params, this.statements, this.type, modifiers, this.sourceSpan);\n    }\n}\nclass UnaryOperatorExpr extends Expression {\n    constructor(operator, expr, type, sourceSpan, parens = true) {\n        super(type || NUMBER_TYPE, sourceSpan);\n        this.operator = operator;\n        this.expr = expr;\n        this.parens = parens;\n    }\n    isEquivalent(e) {\n        return e instanceof UnaryOperatorExpr && this.operator === e.operator &&\n            this.expr.isEquivalent(e.expr);\n    }\n    isConstant() {\n        return false;\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitUnaryOperatorExpr(this, context);\n    }\n}\nclass BinaryOperatorExpr extends Expression {\n    constructor(operator, lhs, rhs, type, sourceSpan, parens = true) {\n        super(type || lhs.type, sourceSpan);\n        this.operator = operator;\n        this.rhs = rhs;\n        this.parens = parens;\n        this.lhs = lhs;\n    }\n    isEquivalent(e) {\n        return e instanceof BinaryOperatorExpr && this.operator === e.operator &&\n            this.lhs.isEquivalent(e.lhs) && this.rhs.isEquivalent(e.rhs);\n    }\n    isConstant() {\n        return false;\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitBinaryOperatorExpr(this, context);\n    }\n}\nclass ReadPropExpr extends Expression {\n    constructor(receiver, name, type, sourceSpan) {\n        super(type, sourceSpan);\n        this.receiver = receiver;\n        this.name = name;\n    }\n    isEquivalent(e) {\n        return e instanceof ReadPropExpr && this.receiver.isEquivalent(e.receiver) &&\n            this.name === e.name;\n    }\n    isConstant() {\n        return false;\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitReadPropExpr(this, context);\n    }\n    set(value) {\n        return new WritePropExpr(this.receiver, this.name, value, null, this.sourceSpan);\n    }\n}\nclass ReadKeyExpr extends Expression {\n    constructor(receiver, index, type, sourceSpan) {\n        super(type, sourceSpan);\n        this.receiver = receiver;\n        this.index = index;\n    }\n    isEquivalent(e) {\n        return e instanceof ReadKeyExpr && this.receiver.isEquivalent(e.receiver) &&\n            this.index.isEquivalent(e.index);\n    }\n    isConstant() {\n        return false;\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitReadKeyExpr(this, context);\n    }\n    set(value) {\n        return new WriteKeyExpr(this.receiver, this.index, value, null, this.sourceSpan);\n    }\n}\nclass LiteralArrayExpr extends Expression {\n    constructor(entries, type, sourceSpan) {\n        super(type, sourceSpan);\n        this.entries = entries;\n    }\n    isConstant() {\n        return this.entries.every(e => e.isConstant());\n    }\n    isEquivalent(e) {\n        return e instanceof LiteralArrayExpr && areAllEquivalent(this.entries, e.entries);\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitLiteralArrayExpr(this, context);\n    }\n}\nclass LiteralMapEntry {\n    constructor(key, value, quoted) {\n        this.key = key;\n        this.value = value;\n        this.quoted = quoted;\n    }\n    isEquivalent(e) {\n        return this.key === e.key && this.value.isEquivalent(e.value);\n    }\n}\nclass LiteralMapExpr extends Expression {\n    constructor(entries, type, sourceSpan) {\n        super(type, sourceSpan);\n        this.entries = entries;\n        this.valueType = null;\n        if (type) {\n            this.valueType = type.valueType;\n        }\n    }\n    isEquivalent(e) {\n        return e instanceof LiteralMapExpr && areAllEquivalent(this.entries, e.entries);\n    }\n    isConstant() {\n        return this.entries.every(e => e.value.isConstant());\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitLiteralMapExpr(this, context);\n    }\n}\nclass CommaExpr extends Expression {\n    constructor(parts, sourceSpan) {\n        super(parts[parts.length - 1].type, sourceSpan);\n        this.parts = parts;\n    }\n    isEquivalent(e) {\n        return e instanceof CommaExpr && areAllEquivalent(this.parts, e.parts);\n    }\n    isConstant() {\n        return false;\n    }\n    visitExpression(visitor, context) {\n        return visitor.visitCommaExpr(this, context);\n    }\n}\nconst THIS_EXPR = new ReadVarExpr(BuiltinVar.This, null, null);\nconst SUPER_EXPR = new ReadVarExpr(BuiltinVar.Super, null, null);\nconst CATCH_ERROR_VAR = new ReadVarExpr(BuiltinVar.CatchError, null, null);\nconst CATCH_STACK_VAR = new ReadVarExpr(BuiltinVar.CatchStack, null, null);\nconst NULL_EXPR = new LiteralExpr(null, null, null);\nconst TYPED_NULL_EXPR = new LiteralExpr(null, INFERRED_TYPE, null);\n//// Statements\nvar StmtModifier;\n(function (StmtModifier) {\n    StmtModifier[StmtModifier[\"Final\"] = 0] = \"Final\";\n    StmtModifier[StmtModifier[\"Private\"] = 1] = \"Private\";\n    StmtModifier[StmtModifier[\"Exported\"] = 2] = \"Exported\";\n    StmtModifier[StmtModifier[\"Static\"] = 3] = \"Static\";\n})(StmtModifier || (StmtModifier = {}));\nclass LeadingComment {\n    constructor(text, multiline, trailingNewline) {\n        this.text = text;\n        this.multiline = multiline;\n        this.trailingNewline = trailingNewline;\n    }\n    toString() {\n        return this.multiline ? ` ${this.text} ` : this.text;\n    }\n}\nclass JSDocComment extends LeadingComment {\n    constructor(tags) {\n        super('', /* multiline */ true, /* trailingNewline */ true);\n        this.tags = tags;\n    }\n    toString() {\n        return serializeTags(this.tags);\n    }\n}\nclass Statement {\n    constructor(modifiers = [], sourceSpan = null, leadingComments) {\n        this.modifiers = modifiers;\n        this.sourceSpan = sourceSpan;\n        this.leadingComments = leadingComments;\n    }\n    hasModifier(modifier) {\n        return this.modifiers.indexOf(modifier) !== -1;\n    }\n    addLeadingComment(leadingComment) {\n        var _a;\n        this.leadingComments = (_a = this.leadingComments) !== null && _a !== void 0 ? _a : [];\n        this.leadingComments.push(leadingComment);\n    }\n}\nclass DeclareVarStmt extends Statement {\n    constructor(name, value, type, modifiers, sourceSpan, leadingComments) {\n        super(modifiers, sourceSpan, leadingComments);\n        this.name = name;\n        this.value = value;\n        this.type = type || (value && value.type) || null;\n    }\n    isEquivalent(stmt) {\n        return stmt instanceof DeclareVarStmt && this.name === stmt.name &&\n            (this.value ? !!stmt.value && this.value.isEquivalent(stmt.value) : !stmt.value);\n    }\n    visitStatement(visitor, context) {\n        return visitor.visitDeclareVarStmt(this, context);\n    }\n}\nclass DeclareFunctionStmt extends Statement {\n    constructor(name, params, statements, type, modifiers, sourceSpan, leadingComments) {\n        super(modifiers, sourceSpan, leadingComments);\n        this.name = name;\n        this.params = params;\n        this.statements = statements;\n        this.type = type || null;\n    }\n    isEquivalent(stmt) {\n        return stmt instanceof DeclareFunctionStmt && areAllEquivalent(this.params, stmt.params) &&\n            areAllEquivalent(this.statements, stmt.statements);\n    }\n    visitStatement(visitor, context) {\n        return visitor.visitDeclareFunctionStmt(this, context);\n    }\n}\nclass ExpressionStatement extends Statement {\n    constructor(expr, sourceSpan, leadingComments) {\n        super([], sourceSpan, leadingComments);\n        this.expr = expr;\n    }\n    isEquivalent(stmt) {\n        return stmt instanceof ExpressionStatement && this.expr.isEquivalent(stmt.expr);\n    }\n    visitStatement(visitor, context) {\n        return visitor.visitExpressionStmt(this, context);\n    }\n}\nclass ReturnStatement extends Statement {\n    constructor(value, sourceSpan = null, leadingComments) {\n        super([], sourceSpan, leadingComments);\n        this.value = value;\n    }\n    isEquivalent(stmt) {\n        return stmt instanceof ReturnStatement && this.value.isEquivalent(stmt.value);\n    }\n    visitStatement(visitor, context) {\n        return visitor.visitReturnStmt(this, context);\n    }\n}\nclass AbstractClassPart {\n    constructor(type = null, modifiers = []) {\n        this.type = type;\n        this.modifiers = modifiers;\n    }\n    hasModifier(modifier) {\n        return this.modifiers.indexOf(modifier) !== -1;\n    }\n}\nclass ClassField extends AbstractClassPart {\n    constructor(name, type, modifiers, initializer) {\n        super(type, modifiers);\n        this.name = name;\n        this.initializer = initializer;\n    }\n    isEquivalent(f) {\n        return this.name === f.name;\n    }\n}\nclass ClassMethod extends AbstractClassPart {\n    constructor(name, params, body, type, modifiers) {\n        super(type, modifiers);\n        this.name = name;\n        this.params = params;\n        this.body = body;\n    }\n    isEquivalent(m) {\n        return this.name === m.name && areAllEquivalent(this.body, m.body);\n    }\n}\nclass ClassGetter extends AbstractClassPart {\n    constructor(name, body, type, modifiers) {\n        super(type, modifiers);\n        this.name = name;\n        this.body = body;\n    }\n    isEquivalent(m) {\n        return this.name === m.name && areAllEquivalent(this.body, m.body);\n    }\n}\nclass ClassStmt extends Statement {\n    constructor(name, parent, fields, getters, constructorMethod, methods, modifiers, sourceSpan, leadingComments) {\n        super(modifiers, sourceSpan, leadingComments);\n        this.name = name;\n        this.parent = parent;\n        this.fields = fields;\n        this.getters = getters;\n        this.constructorMethod = constructorMethod;\n        this.methods = methods;\n    }\n    isEquivalent(stmt) {\n        return stmt instanceof ClassStmt && this.name === stmt.name &&\n            nullSafeIsEquivalent(this.parent, stmt.parent) &&\n            areAllEquivalent(this.fields, stmt.fields) &&\n            areAllEquivalent(this.getters, stmt.getters) &&\n            this.constructorMethod.isEquivalent(stmt.constructorMethod) &&\n            areAllEquivalent(this.methods, stmt.methods);\n    }\n    visitStatement(visitor, context) {\n        return visitor.visitDeclareClassStmt(this, context);\n    }\n}\nclass IfStmt extends Statement {\n    constructor(condition, trueCase, falseCase = [], sourceSpan, leadingComments) {\n        super([], sourceSpan, leadingComments);\n        this.condition = condition;\n        this.trueCase = trueCase;\n        this.falseCase = falseCase;\n    }\n    isEquivalent(stmt) {\n        return stmt instanceof IfStmt && this.condition.isEquivalent(stmt.condition) &&\n            areAllEquivalent(this.trueCase, stmt.trueCase) &&\n            areAllEquivalent(this.falseCase, stmt.falseCase);\n    }\n    visitStatement(visitor, context) {\n        return visitor.visitIfStmt(this, context);\n    }\n}\nclass TryCatchStmt extends Statement {\n    constructor(bodyStmts, catchStmts, sourceSpan = null, leadingComments) {\n        super([], sourceSpan, leadingComments);\n        this.bodyStmts = bodyStmts;\n        this.catchStmts = catchStmts;\n    }\n    isEquivalent(stmt) {\n        return stmt instanceof TryCatchStmt && areAllEquivalent(this.bodyStmts, stmt.bodyStmts) &&\n            areAllEquivalent(this.catchStmts, stmt.catchStmts);\n    }\n    visitStatement(visitor, context) {\n        return visitor.visitTryCatchStmt(this, context);\n    }\n}\nclass ThrowStmt extends Statement {\n    constructor(error, sourceSpan = null, leadingComments) {\n        super([], sourceSpan, leadingComments);\n        this.error = error;\n    }\n    isEquivalent(stmt) {\n        return stmt instanceof TryCatchStmt && this.error.isEquivalent(stmt.error);\n    }\n    visitStatement(visitor, context) {\n        return visitor.visitThrowStmt(this, context);\n    }\n}\nclass AstTransformer {\n    transformExpr(expr, context) {\n        return expr;\n    }\n    transformStmt(stmt, context) {\n        return stmt;\n    }\n    visitReadVarExpr(ast, context) {\n        return this.transformExpr(ast, context);\n    }\n    visitWrappedNodeExpr(ast, context) {\n        return this.transformExpr(ast, context);\n    }\n    visitTypeofExpr(expr, context) {\n        return this.transformExpr(new TypeofExpr(expr.expr.visitExpression(this, context), expr.type, expr.sourceSpan), context);\n    }\n    visitWriteVarExpr(expr, context) {\n        return this.transformExpr(new WriteVarExpr(expr.name, expr.value.visitExpression(this, context), expr.type, expr.sourceSpan), context);\n    }\n    visitWriteKeyExpr(expr, context) {\n        return this.transformExpr(new WriteKeyExpr(expr.receiver.visitExpression(this, context), expr.index.visitExpression(this, context), expr.value.visitExpression(this, context), expr.type, expr.sourceSpan), context);\n    }\n    visitWritePropExpr(expr, context) {\n        return this.transformExpr(new WritePropExpr(expr.receiver.visitExpression(this, context), expr.name, expr.value.visitExpression(this, context), expr.type, expr.sourceSpan), context);\n    }\n    visitInvokeMethodExpr(ast, context) {\n        const method = ast.builtin || ast.name;\n        return this.transformExpr(new InvokeMethodExpr(ast.receiver.visitExpression(this, context), method, this.visitAllExpressions(ast.args, context), ast.type, ast.sourceSpan), context);\n    }\n    visitInvokeFunctionExpr(ast, context) {\n        return this.transformExpr(new InvokeFunctionExpr(ast.fn.visitExpression(this, context), this.visitAllExpressions(ast.args, context), ast.type, ast.sourceSpan), context);\n    }\n    visitInstantiateExpr(ast, context) {\n        return this.transformExpr(new InstantiateExpr(ast.classExpr.visitExpression(this, context), this.visitAllExpressions(ast.args, context), ast.type, ast.sourceSpan), context);\n    }\n    visitLiteralExpr(ast, context) {\n        return this.transformExpr(ast, context);\n    }\n    visitLocalizedString(ast, context) {\n        return this.transformExpr(new LocalizedString(ast.metaBlock, ast.messageParts, ast.placeHolderNames, this.visitAllExpressions(ast.expressions, context), ast.sourceSpan), context);\n    }\n    visitExternalExpr(ast, context) {\n        return this.transformExpr(ast, context);\n    }\n    visitConditionalExpr(ast, context) {\n        return this.transformExpr(new ConditionalExpr(ast.condition.visitExpression(this, context), ast.trueCase.visitExpression(this, context), ast.falseCase.visitExpression(this, context), ast.type, ast.sourceSpan), context);\n    }\n    visitNotExpr(ast, context) {\n        return this.transformExpr(new NotExpr(ast.condition.visitExpression(this, context), ast.sourceSpan), context);\n    }\n    visitAssertNotNullExpr(ast, context) {\n        return this.transformExpr(new AssertNotNull(ast.condition.visitExpression(this, context), ast.sourceSpan), context);\n    }\n    visitCastExpr(ast, context) {\n        return this.transformExpr(new CastExpr(ast.value.visitExpression(this, context), ast.type, ast.sourceSpan), context);\n    }\n    visitFunctionExpr(ast, context) {\n        return this.transformExpr(new FunctionExpr(ast.params, this.visitAllStatements(ast.statements, context), ast.type, ast.sourceSpan), context);\n    }\n    visitUnaryOperatorExpr(ast, context) {\n        return this.transformExpr(new UnaryOperatorExpr(ast.operator, ast.expr.visitExpression(this, context), ast.type, ast.sourceSpan), context);\n    }\n    visitBinaryOperatorExpr(ast, context) {\n        return this.transformExpr(new BinaryOperatorExpr(ast.operator, ast.lhs.visitExpression(this, context), ast.rhs.visitExpression(this, context), ast.type, ast.sourceSpan), context);\n    }\n    visitReadPropExpr(ast, context) {\n        return this.transformExpr(new ReadPropExpr(ast.receiver.visitExpression(this, context), ast.name, ast.type, ast.sourceSpan), context);\n    }\n    visitReadKeyExpr(ast, context) {\n        return this.transformExpr(new ReadKeyExpr(ast.receiver.visitExpression(this, context), ast.index.visitExpression(this, context), ast.type, ast.sourceSpan), context);\n    }\n    visitLiteralArrayExpr(ast, context) {\n        return this.transformExpr(new LiteralArrayExpr(this.visitAllExpressions(ast.entries, context), ast.type, ast.sourceSpan), context);\n    }\n    visitLiteralMapExpr(ast, context) {\n        const entries = ast.entries.map((entry) => new LiteralMapEntry(entry.key, entry.value.visitExpression(this, context), entry.quoted));\n        const mapType = new MapType(ast.valueType);\n        return this.transformExpr(new LiteralMapExpr(entries, mapType, ast.sourceSpan), context);\n    }\n    visitCommaExpr(ast, context) {\n        return this.transformExpr(new CommaExpr(this.visitAllExpressions(ast.parts, context), ast.sourceSpan), context);\n    }\n    visitAllExpressions(exprs, context) {\n        return exprs.map(expr => expr.visitExpression(this, context));\n    }\n    visitDeclareVarStmt(stmt, context) {\n        const value = stmt.value && stmt.value.visitExpression(this, context);\n        return this.transformStmt(new DeclareVarStmt(stmt.name, value, stmt.type, stmt.modifiers, stmt.sourceSpan, stmt.leadingComments), context);\n    }\n    visitDeclareFunctionStmt(stmt, context) {\n        return this.transformStmt(new DeclareFunctionStmt(stmt.name, stmt.params, this.visitAllStatements(stmt.statements, context), stmt.type, stmt.modifiers, stmt.sourceSpan, stmt.leadingComments), context);\n    }\n    visitExpressionStmt(stmt, context) {\n        return this.transformStmt(new ExpressionStatement(stmt.expr.visitExpression(this, context), stmt.sourceSpan, stmt.leadingComments), context);\n    }\n    visitReturnStmt(stmt, context) {\n        return this.transformStmt(new ReturnStatement(stmt.value.visitExpression(this, context), stmt.sourceSpan, stmt.leadingComments), context);\n    }\n    visitDeclareClassStmt(stmt, context) {\n        const parent = stmt.parent.visitExpression(this, context);\n        const getters = stmt.getters.map(getter => new ClassGetter(getter.name, this.visitAllStatements(getter.body, context), getter.type, getter.modifiers));\n        const ctorMethod = stmt.constructorMethod &&\n            new ClassMethod(stmt.constructorMethod.name, stmt.constructorMethod.params, this.visitAllStatements(stmt.constructorMethod.body, context), stmt.constructorMethod.type, stmt.constructorMethod.modifiers);\n        const methods = stmt.methods.map(method => new ClassMethod(method.name, method.params, this.visitAllStatements(method.body, context), method.type, method.modifiers));\n        return this.transformStmt(new ClassStmt(stmt.name, parent, stmt.fields, getters, ctorMethod, methods, stmt.modifiers, stmt.sourceSpan), context);\n    }\n    visitIfStmt(stmt, context) {\n        return this.transformStmt(new IfStmt(stmt.condition.visitExpression(this, context), this.visitAllStatements(stmt.trueCase, context), this.visitAllStatements(stmt.falseCase, context), stmt.sourceSpan, stmt.leadingComments), context);\n    }\n    visitTryCatchStmt(stmt, context) {\n        return this.transformStmt(new TryCatchStmt(this.visitAllStatements(stmt.bodyStmts, context), this.visitAllStatements(stmt.catchStmts, context), stmt.sourceSpan, stmt.leadingComments), context);\n    }\n    visitThrowStmt(stmt, context) {\n        return this.transformStmt(new ThrowStmt(stmt.error.visitExpression(this, context), stmt.sourceSpan, stmt.leadingComments), context);\n    }\n    visitAllStatements(stmts, context) {\n        return stmts.map(stmt => stmt.visitStatement(this, context));\n    }\n}\nclass RecursiveAstVisitor {\n    visitType(ast, context) {\n        return ast;\n    }\n    visitExpression(ast, context) {\n        if (ast.type) {\n            ast.type.visitType(this, context);\n        }\n        return ast;\n    }\n    visitBuiltinType(type, context) {\n        return this.visitType(type, context);\n    }\n    visitExpressionType(type, context) {\n        type.value.visitExpression(this, context);\n        if (type.typeParams !== null) {\n            type.typeParams.forEach(param => this.visitType(param, context));\n        }\n        return this.visitType(type, context);\n    }\n    visitArrayType(type, context) {\n        return this.visitType(type, context);\n    }\n    visitMapType(type, context) {\n        return this.visitType(type, context);\n    }\n    visitWrappedNodeExpr(ast, context) {\n        return ast;\n    }\n    visitTypeofExpr(ast, context) {\n        return this.visitExpression(ast, context);\n    }\n    visitReadVarExpr(ast, context) {\n        return this.visitExpression(ast, context);\n    }\n    visitWriteVarExpr(ast, context) {\n        ast.value.visitExpression(this, context);\n        return this.visitExpression(ast, context);\n    }\n    visitWriteKeyExpr(ast, context) {\n        ast.receiver.visitExpression(this, context);\n        ast.index.visitExpression(this, context);\n        ast.value.visitExpression(this, context);\n        return this.visitExpression(ast, context);\n    }\n    visitWritePropExpr(ast, context) {\n        ast.receiver.visitExpression(this, context);\n        ast.value.visitExpression(this, context);\n        return this.visitExpression(ast, context);\n    }\n    visitInvokeMethodExpr(ast, context) {\n        ast.receiver.visitExpression(this, context);\n        this.visitAllExpressions(ast.args, context);\n        return this.visitExpression(ast, context);\n    }\n    visitInvokeFunctionExpr(ast, context) {\n        ast.fn.visitExpression(this, context);\n        this.visitAllExpressions(ast.args, context);\n        return this.visitExpression(ast, context);\n    }\n    visitInstantiateExpr(ast, context) {\n        ast.classExpr.visitExpression(this, context);\n        this.visitAllExpressions(ast.args, context);\n        return this.visitExpression(ast, context);\n    }\n    visitLiteralExpr(ast, context) {\n        return this.visitExpression(ast, context);\n    }\n    visitLocalizedString(ast, context) {\n        return this.visitExpression(ast, context);\n    }\n    visitExternalExpr(ast, context) {\n        if (ast.typeParams) {\n            ast.typeParams.forEach(type => type.visitType(this, context));\n        }\n        return this.visitExpression(ast, context);\n    }\n    visitConditionalExpr(ast, context) {\n        ast.condition.visitExpression(this, context);\n        ast.trueCase.visitExpression(this, context);\n        ast.falseCase.visitExpression(this, context);\n        return this.visitExpression(ast, context);\n    }\n    visitNotExpr(ast, context) {\n        ast.condition.visitExpression(this, context);\n        return this.visitExpression(ast, context);\n    }\n    visitAssertNotNullExpr(ast, context) {\n        ast.condition.visitExpression(this, context);\n        return this.visitExpression(ast, context);\n    }\n    visitCastExpr(ast, context) {\n        ast.value.visitExpression(this, context);\n        return this.visitExpression(ast, context);\n    }\n    visitFunctionExpr(ast, context) {\n        this.visitAllStatements(ast.statements, context);\n        return this.visitExpression(ast, context);\n    }\n    visitUnaryOperatorExpr(ast, context) {\n        ast.expr.visitExpression(this, context);\n        return this.visitExpression(ast, context);\n    }\n    visitBinaryOperatorExpr(ast, context) {\n        ast.lhs.visitExpression(this, context);\n        ast.rhs.visitExpression(this, context);\n        return this.visitExpression(ast, context);\n    }\n    visitReadPropExpr(ast, context) {\n        ast.receiver.visitExpression(this, context);\n        return this.visitExpression(ast, context);\n    }\n    visitReadKeyExpr(ast, context) {\n        ast.receiver.visitExpression(this, context);\n        ast.index.visitExpression(this, context);\n        return this.visitExpression(ast, context);\n    }\n    visitLiteralArrayExpr(ast, context) {\n        this.visitAllExpressions(ast.entries, context);\n        return this.visitExpression(ast, context);\n    }\n    visitLiteralMapExpr(ast, context) {\n        ast.entries.forEach((entry) => entry.value.visitExpression(this, context));\n        return this.visitExpression(ast, context);\n    }\n    visitCommaExpr(ast, context) {\n        this.visitAllExpressions(ast.parts, context);\n        return this.visitExpression(ast, context);\n    }\n    visitAllExpressions(exprs, context) {\n        exprs.forEach(expr => expr.visitExpression(this, context));\n    }\n    visitDeclareVarStmt(stmt, context) {\n        if (stmt.value) {\n            stmt.value.visitExpression(this, context);\n        }\n        if (stmt.type) {\n            stmt.type.visitType(this, context);\n        }\n        return stmt;\n    }\n    visitDeclareFunctionStmt(stmt, context) {\n        this.visitAllStatements(stmt.statements, context);\n        if (stmt.type) {\n            stmt.type.visitType(this, context);\n        }\n        return stmt;\n    }\n    visitExpressionStmt(stmt, context) {\n        stmt.expr.visitExpression(this, context);\n        return stmt;\n    }\n    visitReturnStmt(stmt, context) {\n        stmt.value.visitExpression(this, context);\n        return stmt;\n    }\n    visitDeclareClassStmt(stmt, context) {\n        stmt.parent.visitExpression(this, context);\n        stmt.getters.forEach(getter => this.visitAllStatements(getter.body, context));\n        if (stmt.constructorMethod) {\n            this.visitAllStatements(stmt.constructorMethod.body, context);\n        }\n        stmt.methods.forEach(method => this.visitAllStatements(method.body, context));\n        return stmt;\n    }\n    visitIfStmt(stmt, context) {\n        stmt.condition.visitExpression(this, context);\n        this.visitAllStatements(stmt.trueCase, context);\n        this.visitAllStatements(stmt.falseCase, context);\n        return stmt;\n    }\n    visitTryCatchStmt(stmt, context) {\n        this.visitAllStatements(stmt.bodyStmts, context);\n        this.visitAllStatements(stmt.catchStmts, context);\n        return stmt;\n    }\n    visitThrowStmt(stmt, context) {\n        stmt.error.visitExpression(this, context);\n        return stmt;\n    }\n    visitAllStatements(stmts, context) {\n        stmts.forEach(stmt => stmt.visitStatement(this, context));\n    }\n}\nfunction findReadVarNames(stmts) {\n    const visitor = new _ReadVarVisitor();\n    visitor.visitAllStatements(stmts, null);\n    return visitor.varNames;\n}\nclass _ReadVarVisitor extends RecursiveAstVisitor {\n    constructor() {\n        super(...arguments);\n        this.varNames = new Set();\n    }\n    visitDeclareFunctionStmt(stmt, context) {\n        // Don't descend into nested functions\n        return stmt;\n    }\n    visitDeclareClassStmt(stmt, context) {\n        // Don't descend into nested classes\n        return stmt;\n    }\n    visitReadVarExpr(ast, context) {\n        if (ast.name) {\n            this.varNames.add(ast.name);\n        }\n        return null;\n    }\n}\nfunction collectExternalReferences(stmts) {\n    const visitor = new _FindExternalReferencesVisitor();\n    visitor.visitAllStatements(stmts, null);\n    return visitor.externalReferences;\n}\nclass _FindExternalReferencesVisitor extends RecursiveAstVisitor {\n    constructor() {\n        super(...arguments);\n        this.externalReferences = [];\n    }\n    visitExternalExpr(e, context) {\n        this.externalReferences.push(e.value);\n        return super.visitExternalExpr(e, context);\n    }\n}\nfunction applySourceSpanToStatementIfNeeded(stmt, sourceSpan) {\n    if (!sourceSpan) {\n        return stmt;\n    }\n    const transformer = new _ApplySourceSpanTransformer(sourceSpan);\n    return stmt.visitStatement(transformer, null);\n}\nfunction applySourceSpanToExpressionIfNeeded(expr, sourceSpan) {\n    if (!sourceSpan) {\n        return expr;\n    }\n    const transformer = new _ApplySourceSpanTransformer(sourceSpan);\n    return expr.visitExpression(transformer, null);\n}\nclass _ApplySourceSpanTransformer extends AstTransformer {\n    constructor(sourceSpan) {\n        super();\n        this.sourceSpan = sourceSpan;\n    }\n    _clone(obj) {\n        const clone = Object.create(obj.constructor.prototype);\n        for (let prop of Object.keys(obj)) {\n            clone[prop] = obj[prop];\n        }\n        return clone;\n    }\n    transformExpr(expr, context) {\n        if (!expr.sourceSpan) {\n            expr = this._clone(expr);\n            expr.sourceSpan = this.sourceSpan;\n        }\n        return expr;\n    }\n    transformStmt(stmt, context) {\n        if (!stmt.sourceSpan) {\n            stmt = this._clone(stmt);\n            stmt.sourceSpan = this.sourceSpan;\n        }\n        return stmt;\n    }\n}\nfunction leadingComment(text, multiline = false, trailingNewline = true) {\n    return new LeadingComment(text, multiline, trailingNewline);\n}\nfunction jsDocComment(tags = []) {\n    return new JSDocComment(tags);\n}\nfunction variable(name, type, sourceSpan) {\n    return new ReadVarExpr(name, type, sourceSpan);\n}\nfunction importExpr(id, typeParams = null, sourceSpan) {\n    return new ExternalExpr(id, null, typeParams, sourceSpan);\n}\nfunction importType(id, typeParams, typeModifiers) {\n    return id != null ? expressionType(importExpr(id, typeParams, null), typeModifiers) : null;\n}\nfunction expressionType(expr, typeModifiers, typeParams) {\n    return new ExpressionType(expr, typeModifiers, typeParams);\n}\nfunction typeofExpr(expr) {\n    return new TypeofExpr(expr);\n}\nfunction literalArr(values, type, sourceSpan) {\n    return new LiteralArrayExpr(values, type, sourceSpan);\n}\nfunction literalMap(values, type = null) {\n    return new LiteralMapExpr(values.map(e => new LiteralMapEntry(e.key, e.value, e.quoted)), type, null);\n}\nfunction unary(operator, expr, type, sourceSpan) {\n    return new UnaryOperatorExpr(operator, expr, type, sourceSpan);\n}\nfunction not(expr, sourceSpan) {\n    return new NotExpr(expr, sourceSpan);\n}\nfunction assertNotNull(expr, sourceSpan) {\n    return new AssertNotNull(expr, sourceSpan);\n}\nfunction fn(params, body, type, sourceSpan, name) {\n    return new FunctionExpr(params, body, type, sourceSpan, name);\n}\nfunction ifStmt(condition, thenClause, elseClause, sourceSpan, leadingComments) {\n    return new IfStmt(condition, thenClause, elseClause, sourceSpan, leadingComments);\n}\nfunction literal(value, type, sourceSpan) {\n    return new LiteralExpr(value, type, sourceSpan);\n}\nfunction localizedString(metaBlock, messageParts, placeholderNames, expressions, sourceSpan) {\n    return new LocalizedString(metaBlock, messageParts, placeholderNames, expressions, sourceSpan);\n}\nfunction isNull(exp) {\n    return exp instanceof LiteralExpr && exp.value === null;\n}\n/*\n * Serializes a `Tag` into a string.\n * Returns a string like \" @foo {bar} baz\" (note the leading whitespace before `@foo`).\n */\nfunction tagToString(tag) {\n    let out = '';\n    if (tag.tagName) {\n        out += ` @${tag.tagName}`;\n    }\n    if (tag.text) {\n        if (tag.text.match(/\\/\\*|\\*\\//)) {\n            throw new Error('JSDoc text cannot contain \"/*\" and \"*/\"');\n        }\n        out += ' ' + tag.text.replace(/@/g, '\\\\@');\n    }\n    return out;\n}\nfunction serializeTags(tags) {\n    if (tags.length === 0)\n        return '';\n    if (tags.length === 1 && tags[0].tagName && !tags[0].text) {\n        // The JSDOC comment is a single simple tag: e.g `/** @tagname */`.\n        return `*${tagToString(tags[0])} `;\n    }\n    let out = '*\\n';\n    for (const tag of tags) {\n        out += ' *';\n        // If the tagToString is multi-line, insert \" * \" prefixes on lines.\n        out += tagToString(tag).replace(/\\n/g, '\\n * ');\n        out += '\\n';\n    }\n    out += ' ';\n    return out;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst DASH_CASE_REGEXP = /-+([a-z0-9])/g;\nfunction dashCaseToCamelCase(input) {\n    return input.replace(DASH_CASE_REGEXP, (...m) => m[1].toUpperCase());\n}\nfunction splitAtColon(input, defaultValues) {\n    return _splitAt(input, ':', defaultValues);\n}\nfunction splitAtPeriod(input, defaultValues) {\n    return _splitAt(input, '.', defaultValues);\n}\nfunction _splitAt(input, character, defaultValues) {\n    const characterIndex = input.indexOf(character);\n    if (characterIndex == -1)\n        return defaultValues;\n    return [input.slice(0, characterIndex).trim(), input.slice(characterIndex + 1).trim()];\n}\nfunction visitValue(value, visitor, context) {\n    if (Array.isArray(value)) {\n        return visitor.visitArray(value, context);\n    }\n    if (isStrictStringMap(value)) {\n        return visitor.visitStringMap(value, context);\n    }\n    if (value == null || typeof value == 'string' || typeof value == 'number' ||\n        typeof value == 'boolean') {\n        return visitor.visitPrimitive(value, context);\n    }\n    return visitor.visitOther(value, context);\n}\nfunction isDefined(val) {\n    return val !== null && val !== undefined;\n}\nfunction noUndefined(val) {\n    return val === undefined ? null : val;\n}\nclass ValueTransformer {\n    visitArray(arr, context) {\n        return arr.map(value => visitValue(value, this, context));\n    }\n    visitStringMap(map, context) {\n        const result = {};\n        Object.keys(map).forEach(key => {\n            result[key] = visitValue(map[key], this, context);\n        });\n        return result;\n    }\n    visitPrimitive(value, context) {\n        return value;\n    }\n    visitOther(value, context) {\n        return value;\n    }\n}\nconst SyncAsync = {\n    assertSync: (value) => {\n        if (isPromise(value)) {\n            throw new Error(`Illegal state: value cannot be a promise`);\n        }\n        return value;\n    },\n    then: (value, cb) => {\n        return isPromise(value) ? value.then(cb) : cb(value);\n    },\n    all: (syncAsyncValues) => {\n        return syncAsyncValues.some(isPromise) ? Promise.all(syncAsyncValues) : syncAsyncValues;\n    }\n};\nfunction error(msg) {\n    throw new Error(`Internal Error: ${msg}`);\n}\nfunction syntaxError(msg, parseErrors) {\n    const error = Error(msg);\n    error[ERROR_SYNTAX_ERROR] = true;\n    if (parseErrors)\n        error[ERROR_PARSE_ERRORS] = parseErrors;\n    return error;\n}\nconst ERROR_SYNTAX_ERROR = 'ngSyntaxError';\nconst ERROR_PARSE_ERRORS = 'ngParseErrors';\nfunction isSyntaxError(error) {\n    return error[ERROR_SYNTAX_ERROR];\n}\nfunction getParseErrors(error) {\n    return error[ERROR_PARSE_ERRORS] || [];\n}\n// Escape characters that have a special meaning in Regular Expressions\nfunction escapeRegExp(s) {\n    return s.replace(/([.*+?^=!:${}()|[\\]\\/\\\\])/g, '\\\\$1');\n}\nconst STRING_MAP_PROTO = Object.getPrototypeOf({});\nfunction isStrictStringMap(obj) {\n    return typeof obj === 'object' && obj !== null && Object.getPrototypeOf(obj) === STRING_MAP_PROTO;\n}\nfunction utf8Encode(str) {\n    let encoded = '';\n    for (let index = 0; index < str.length; index++) {\n        let codePoint = str.charCodeAt(index);\n        // decode surrogate\n        // see https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae\n        if (codePoint >= 0xd800 && codePoint <= 0xdbff && str.length > (index + 1)) {\n            const low = str.charCodeAt(index + 1);\n            if (low >= 0xdc00 && low <= 0xdfff) {\n                index++;\n                codePoint = ((codePoint - 0xd800) << 10) + low - 0xdc00 + 0x10000;\n            }\n        }\n        if (codePoint <= 0x7f) {\n            encoded += String.fromCharCode(codePoint);\n        }\n        else if (codePoint <= 0x7ff) {\n            encoded += String.fromCharCode(((codePoint >> 6) & 0x1F) | 0xc0, (codePoint & 0x3f) | 0x80);\n        }\n        else if (codePoint <= 0xffff) {\n            encoded += String.fromCharCode((codePoint >> 12) | 0xe0, ((codePoint >> 6) & 0x3f) | 0x80, (codePoint & 0x3f) | 0x80);\n        }\n        else if (codePoint <= 0x1fffff) {\n            encoded += String.fromCharCode(((codePoint >> 18) & 0x07) | 0xf0, ((codePoint >> 12) & 0x3f) | 0x80, ((codePoint >> 6) & 0x3f) | 0x80, (codePoint & 0x3f) | 0x80);\n        }\n    }\n    return encoded;\n}\nfunction stringify(token) {\n    if (typeof token === 'string') {\n        return token;\n    }\n    if (Array.isArray(token)) {\n        return '[' + token.map(stringify).join(', ') + ']';\n    }\n    if (token == null) {\n        return '' + token;\n    }\n    if (token.overriddenName) {\n        return `${token.overriddenName}`;\n    }\n    if (token.name) {\n        return `${token.name}`;\n    }\n    if (!token.toString) {\n        return 'object';\n    }\n    // WARNING: do not try to `JSON.stringify(token)` here\n    // see https://github.com/angular/angular/issues/23440\n    const res = token.toString();\n    if (res == null) {\n        return '' + res;\n    }\n    const newLineIndex = res.indexOf('\\n');\n    return newLineIndex === -1 ? res : res.substring(0, newLineIndex);\n}\n/**\n * Lazily retrieves the reference value from a forwardRef.\n */\nfunction resolveForwardRef(type) {\n    if (typeof type === 'function' && type.hasOwnProperty('__forward_ref__')) {\n        return type();\n    }\n    else {\n        return type;\n    }\n}\n/**\n * Determine if the argument is shaped like a Promise\n */\nfunction isPromise(obj) {\n    // allow any Promise/A+ compliant thenable.\n    // It's up to the caller to ensure that obj.then conforms to the spec\n    return !!obj && typeof obj.then === 'function';\n}\nclass Version {\n    constructor(full) {\n        this.full = full;\n        const splits = full.split('.');\n        this.major = splits[0];\n        this.minor = splits[1];\n        this.patch = splits.slice(2).join('.');\n    }\n}\nconst __window = typeof window !== 'undefined' && window;\nconst __self = typeof self !== 'undefined' && typeof WorkerGlobalScope !== 'undefined' &&\n    self instanceof WorkerGlobalScope && self;\nconst __global = typeof global !== 'undefined' && global;\n// Check __global first, because in Node tests both __global and __window may be defined and _global\n// should be __global in that case.\nconst _global = __global || __window || __self;\nfunction newArray(size, value) {\n    const list = [];\n    for (let i = 0; i < size; i++) {\n        list.push(value);\n    }\n    return list;\n}\n/**\n * Partitions a given array into 2 arrays, based on a boolean value returned by the condition\n * function.\n *\n * @param arr Input array that should be partitioned\n * @param conditionFn Condition function that is called for each item in a given array and returns a\n * boolean value.\n */\nfunction partitionArray(arr, conditionFn) {\n    const truthy = [];\n    const falsy = [];\n    arr.forEach(item => {\n        (conditionFn(item) ? truthy : falsy).push(item);\n    });\n    return [truthy, falsy];\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst CONSTANT_PREFIX = '_c';\n/**\n * `ConstantPool` tries to reuse literal factories when two or more literals are identical.\n * We determine whether literals are identical by creating a key out of their AST using the\n * `KeyVisitor`. This constant is used to replace dynamic expressions which can't be safely\n * converted into a key. E.g. given an expression `{foo: bar()}`, since we don't know what\n * the result of `bar` will be, we create a key that looks like `{foo: <unknown>}`. Note\n * that we use a variable, rather than something like `null` in order to avoid collisions.\n */\nconst UNKNOWN_VALUE_KEY = variable('<unknown>');\n/**\n * Context to use when producing a key.\n *\n * This ensures we see the constant not the reference variable when producing\n * a key.\n */\nconst KEY_CONTEXT = {};\n/**\n * Generally all primitive values are excluded from the `ConstantPool`, but there is an exclusion\n * for strings that reach a certain length threshold. This constant defines the length threshold for\n * strings.\n */\nconst POOL_INCLUSION_LENGTH_THRESHOLD_FOR_STRINGS = 50;\n/**\n * A node that is a place-holder that allows the node to be replaced when the actual\n * node is known.\n *\n * This allows the constant pool to change an expression from a direct reference to\n * a constant to a shared constant. It returns a fix-up node that is later allowed to\n * change the referenced expression.\n */\nclass FixupExpression extends Expression {\n    constructor(resolved) {\n        super(resolved.type);\n        this.resolved = resolved;\n        this.original = resolved;\n    }\n    visitExpression(visitor, context) {\n        if (context === KEY_CONTEXT) {\n            // When producing a key we want to traverse the constant not the\n            // variable used to refer to it.\n            return this.original.visitExpression(visitor, context);\n        }\n        else {\n            return this.resolved.visitExpression(visitor, context);\n        }\n    }\n    isEquivalent(e) {\n        return e instanceof FixupExpression && this.resolved.isEquivalent(e.resolved);\n    }\n    isConstant() {\n        return true;\n    }\n    fixup(expression) {\n        this.resolved = expression;\n        this.shared = true;\n    }\n}\n/**\n * A constant pool allows a code emitter to share constant in an output context.\n *\n * The constant pool also supports sharing access to ivy definitions references.\n */\nclass ConstantPool {\n    constructor(isClosureCompilerEnabled = false) {\n        this.isClosureCompilerEnabled = isClosureCompilerEnabled;\n        this.statements = [];\n        this.literals = new Map();\n        this.literalFactories = new Map();\n        this.injectorDefinitions = new Map();\n        this.directiveDefinitions = new Map();\n        this.componentDefinitions = new Map();\n        this.pipeDefinitions = new Map();\n        this.nextNameIndex = 0;\n    }\n    getConstLiteral(literal, forceShared) {\n        if ((literal instanceof LiteralExpr && !isLongStringLiteral(literal)) ||\n            literal instanceof FixupExpression) {\n            // Do no put simple literals into the constant pool or try to produce a constant for a\n            // reference to a constant.\n            return literal;\n        }\n        const key = this.keyOf(literal);\n        let fixup = this.literals.get(key);\n        let newValue = false;\n        if (!fixup) {\n            fixup = new FixupExpression(literal);\n            this.literals.set(key, fixup);\n            newValue = true;\n        }\n        if ((!newValue && !fixup.shared) || (newValue && forceShared)) {\n            // Replace the expression with a variable\n            const name = this.freshName();\n            let definition;\n            let usage;\n            if (this.isClosureCompilerEnabled && isLongStringLiteral(literal)) {\n                // For string literals, Closure will **always** inline the string at\n                // **all** usages, duplicating it each time. For large strings, this\n                // unnecessarily bloats bundle size. To work around this restriction, we\n                // wrap the string in a function, and call that function for each usage.\n                // This tricks Closure into using inline logic for functions instead of\n                // string literals. Function calls are only inlined if the body is small\n                // enough to be worth it. By doing this, very large strings will be\n                // shared across multiple usages, rather than duplicating the string at\n                // each usage site.\n                //\n                // const myStr = function() { return \"very very very long string\"; };\n                // const usage1 = myStr();\n                // const usage2 = myStr();\n                definition = variable(name).set(new FunctionExpr([], // Params.\n                [\n                    // Statements.\n                    new ReturnStatement(literal),\n                ]));\n                usage = variable(name).callFn([]);\n            }\n            else {\n                // Just declare and use the variable directly, without a function call\n                // indirection. This saves a few bytes and avoids an unncessary call.\n                definition = variable(name).set(literal);\n                usage = variable(name);\n            }\n            this.statements.push(definition.toDeclStmt(INFERRED_TYPE, [StmtModifier.Final]));\n            fixup.fixup(usage);\n        }\n        return fixup;\n    }\n    getDefinition(type, kind, ctx, forceShared = false) {\n        const definitions = this.definitionsOf(kind);\n        let fixup = definitions.get(type);\n        let newValue = false;\n        if (!fixup) {\n            const property = this.propertyNameOf(kind);\n            fixup = new FixupExpression(ctx.importExpr(type).prop(property));\n            definitions.set(type, fixup);\n            newValue = true;\n        }\n        if ((!newValue && !fixup.shared) || (newValue && forceShared)) {\n            const name = this.freshName();\n            this.statements.push(variable(name).set(fixup.resolved).toDeclStmt(INFERRED_TYPE, [StmtModifier.Final]));\n            fixup.fixup(variable(name));\n        }\n        return fixup;\n    }\n    getLiteralFactory(literal) {\n        // Create a pure function that builds an array of a mix of constant and variable expressions\n        if (literal instanceof LiteralArrayExpr) {\n            const argumentsForKey = literal.entries.map(e => e.isConstant() ? e : UNKNOWN_VALUE_KEY);\n            const key = this.keyOf(literalArr(argumentsForKey));\n            return this._getLiteralFactory(key, literal.entries, entries => literalArr(entries));\n        }\n        else {\n            const expressionForKey = literalMap(literal.entries.map(e => ({\n                key: e.key,\n                value: e.value.isConstant() ? e.value : UNKNOWN_VALUE_KEY,\n                quoted: e.quoted\n            })));\n            const key = this.keyOf(expressionForKey);\n            return this._getLiteralFactory(key, literal.entries.map(e => e.value), entries => literalMap(entries.map((value, index) => ({\n                key: literal.entries[index].key,\n                value,\n                quoted: literal.entries[index].quoted\n            }))));\n        }\n    }\n    _getLiteralFactory(key, values, resultMap) {\n        let literalFactory = this.literalFactories.get(key);\n        const literalFactoryArguments = values.filter((e => !e.isConstant()));\n        if (!literalFactory) {\n            const resultExpressions = values.map((e, index) => e.isConstant() ? this.getConstLiteral(e, true) : variable(`a${index}`));\n            const parameters = resultExpressions.filter(isVariable).map(e => new FnParam(e.name, DYNAMIC_TYPE));\n            const pureFunctionDeclaration = fn(parameters, [new ReturnStatement(resultMap(resultExpressions))], INFERRED_TYPE);\n            const name = this.freshName();\n            this.statements.push(variable(name).set(pureFunctionDeclaration).toDeclStmt(INFERRED_TYPE, [\n                StmtModifier.Final\n            ]));\n            literalFactory = variable(name);\n            this.literalFactories.set(key, literalFactory);\n        }\n        return { literalFactory, literalFactoryArguments };\n    }\n    /**\n     * Produce a unique name.\n     *\n     * The name might be unique among different prefixes if any of the prefixes end in\n     * a digit so the prefix should be a constant string (not based on user input) and\n     * must not end in a digit.\n     */\n    uniqueName(prefix) {\n        return `${prefix}${this.nextNameIndex++}`;\n    }\n    definitionsOf(kind) {\n        switch (kind) {\n            case 2 /* Component */:\n                return this.componentDefinitions;\n            case 1 /* Directive */:\n                return this.directiveDefinitions;\n            case 0 /* Injector */:\n                return this.injectorDefinitions;\n            case 3 /* Pipe */:\n                return this.pipeDefinitions;\n        }\n        error(`Unknown definition kind ${kind}`);\n        return this.componentDefinitions;\n    }\n    propertyNameOf(kind) {\n        switch (kind) {\n            case 2 /* Component */:\n                return 'ɵcmp';\n            case 1 /* Directive */:\n                return 'ɵdir';\n            case 0 /* Injector */:\n                return 'ɵinj';\n            case 3 /* Pipe */:\n                return 'ɵpipe';\n        }\n        error(`Unknown definition kind ${kind}`);\n        return '<unknown>';\n    }\n    freshName() {\n        return this.uniqueName(CONSTANT_PREFIX);\n    }\n    keyOf(expression) {\n        return expression.visitExpression(new KeyVisitor(), KEY_CONTEXT);\n    }\n}\n/**\n * Visitor used to determine if 2 expressions are equivalent and can be shared in the\n * `ConstantPool`.\n *\n * When the id (string) generated by the visitor is equal, expressions are considered equivalent.\n */\nclass KeyVisitor {\n    constructor() {\n        this.visitWrappedNodeExpr = invalid;\n        this.visitWriteVarExpr = invalid;\n        this.visitWriteKeyExpr = invalid;\n        this.visitWritePropExpr = invalid;\n        this.visitInvokeMethodExpr = invalid;\n        this.visitInvokeFunctionExpr = invalid;\n        this.visitInstantiateExpr = invalid;\n        this.visitConditionalExpr = invalid;\n        this.visitNotExpr = invalid;\n        this.visitAssertNotNullExpr = invalid;\n        this.visitCastExpr = invalid;\n        this.visitFunctionExpr = invalid;\n        this.visitUnaryOperatorExpr = invalid;\n        this.visitBinaryOperatorExpr = invalid;\n        this.visitReadPropExpr = invalid;\n        this.visitReadKeyExpr = invalid;\n        this.visitCommaExpr = invalid;\n        this.visitLocalizedString = invalid;\n    }\n    visitLiteralExpr(ast) {\n        return `${typeof ast.value === 'string' ? '\"' + ast.value + '\"' : ast.value}`;\n    }\n    visitLiteralArrayExpr(ast, context) {\n        return `[${ast.entries.map(entry => entry.visitExpression(this, context)).join(',')}]`;\n    }\n    visitLiteralMapExpr(ast, context) {\n        const mapKey = (entry) => {\n            const quote = entry.quoted ? '\"' : '';\n            return `${quote}${entry.key}${quote}`;\n        };\n        const mapEntry = (entry) => `${mapKey(entry)}:${entry.value.visitExpression(this, context)}`;\n        return `{${ast.entries.map(mapEntry).join(',')}`;\n    }\n    visitExternalExpr(ast) {\n        return ast.value.moduleName ? `EX:${ast.value.moduleName}:${ast.value.name}` :\n            `EX:${ast.value.runtime.name}`;\n    }\n    visitReadVarExpr(node) {\n        return `VAR:${node.name}`;\n    }\n    visitTypeofExpr(node, context) {\n        return `TYPEOF:${node.expr.visitExpression(this, context)}`;\n    }\n}\nfunction invalid(arg) {\n    throw new Error(`Invalid state: Visitor ${this.constructor.name} doesn't handle ${arg.constructor.name}`);\n}\nfunction isVariable(e) {\n    return e instanceof ReadVarExpr;\n}\nfunction isLongStringLiteral(expr) {\n    return expr instanceof LiteralExpr && typeof expr.value === 'string' &&\n        expr.value.length >= POOL_INCLUSION_LENGTH_THRESHOLD_FOR_STRINGS;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst CORE = '@angular/core';\nclass Identifiers {\n}\nIdentifiers.ANALYZE_FOR_ENTRY_COMPONENTS = {\n    name: 'ANALYZE_FOR_ENTRY_COMPONENTS',\n    moduleName: CORE,\n};\nIdentifiers.ElementRef = { name: 'ElementRef', moduleName: CORE };\nIdentifiers.NgModuleRef = { name: 'NgModuleRef', moduleName: CORE };\nIdentifiers.ViewContainerRef = { name: 'ViewContainerRef', moduleName: CORE };\nIdentifiers.ChangeDetectorRef = {\n    name: 'ChangeDetectorRef',\n    moduleName: CORE,\n};\nIdentifiers.QueryList = { name: 'QueryList', moduleName: CORE };\nIdentifiers.TemplateRef = { name: 'TemplateRef', moduleName: CORE };\nIdentifiers.Renderer2 = { name: 'Renderer2', moduleName: CORE };\nIdentifiers.CodegenComponentFactoryResolver = {\n    name: 'ɵCodegenComponentFactoryResolver',\n    moduleName: CORE,\n};\nIdentifiers.ComponentFactoryResolver = {\n    name: 'ComponentFactoryResolver',\n    moduleName: CORE,\n};\nIdentifiers.ComponentFactory = { name: 'ComponentFactory', moduleName: CORE };\nIdentifiers.ComponentRef = { name: 'ComponentRef', moduleName: CORE };\nIdentifiers.NgModuleFactory = { name: 'NgModuleFactory', moduleName: CORE };\nIdentifiers.createModuleFactory = {\n    name: 'ɵcmf',\n    moduleName: CORE,\n};\nIdentifiers.moduleDef = {\n    name: 'ɵmod',\n    moduleName: CORE,\n};\nIdentifiers.moduleProviderDef = {\n    name: 'ɵmpd',\n    moduleName: CORE,\n};\nIdentifiers.RegisterModuleFactoryFn = {\n    name: 'ɵregisterModuleFactory',\n    moduleName: CORE,\n};\nIdentifiers.inject = { name: 'ɵɵinject', moduleName: CORE };\nIdentifiers.directiveInject = { name: 'ɵɵdirectiveInject', moduleName: CORE };\nIdentifiers.INJECTOR = { name: 'INJECTOR', moduleName: CORE };\nIdentifiers.Injector = { name: 'Injector', moduleName: CORE };\nIdentifiers.ɵɵdefineInjectable = { name: 'ɵɵdefineInjectable', moduleName: CORE };\nIdentifiers.InjectableDef = { name: 'ɵɵInjectableDef', moduleName: CORE };\nIdentifiers.ViewEncapsulation = {\n    name: 'ViewEncapsulation',\n    moduleName: CORE,\n};\nIdentifiers.ChangeDetectionStrategy = {\n    name: 'ChangeDetectionStrategy',\n    moduleName: CORE,\n};\nIdentifiers.SecurityContext = {\n    name: 'SecurityContext',\n    moduleName: CORE,\n};\nIdentifiers.LOCALE_ID = { name: 'LOCALE_ID', moduleName: CORE };\nIdentifiers.TRANSLATIONS_FORMAT = {\n    name: 'TRANSLATIONS_FORMAT',\n    moduleName: CORE,\n};\nIdentifiers.inlineInterpolate = {\n    name: 'ɵinlineInterpolate',\n    moduleName: CORE,\n};\nIdentifiers.interpolate = { name: 'ɵinterpolate', moduleName: CORE };\nIdentifiers.EMPTY_ARRAY = { name: 'ɵEMPTY_ARRAY', moduleName: CORE };\nIdentifiers.EMPTY_MAP = { name: 'ɵEMPTY_MAP', moduleName: CORE };\nIdentifiers.Renderer = { name: 'Renderer', moduleName: CORE };\nIdentifiers.viewDef = { name: 'ɵvid', moduleName: CORE };\nIdentifiers.elementDef = { name: 'ɵeld', moduleName: CORE };\nIdentifiers.anchorDef = { name: 'ɵand', moduleName: CORE };\nIdentifiers.textDef = { name: 'ɵted', moduleName: CORE };\nIdentifiers.directiveDef = { name: 'ɵdid', moduleName: CORE };\nIdentifiers.providerDef = { name: 'ɵprd', moduleName: CORE };\nIdentifiers.queryDef = { name: 'ɵqud', moduleName: CORE };\nIdentifiers.pureArrayDef = { name: 'ɵpad', moduleName: CORE };\nIdentifiers.pureObjectDef = { name: 'ɵpod', moduleName: CORE };\nIdentifiers.purePipeDef = { name: 'ɵppd', moduleName: CORE };\nIdentifiers.pipeDef = { name: 'ɵpid', moduleName: CORE };\nIdentifiers.nodeValue = { name: 'ɵnov', moduleName: CORE };\nIdentifiers.ngContentDef = { name: 'ɵncd', moduleName: CORE };\nIdentifiers.unwrapValue = { name: 'ɵunv', moduleName: CORE };\nIdentifiers.createRendererType2 = { name: 'ɵcrt', moduleName: CORE };\n// type only\nIdentifiers.RendererType2 = {\n    name: 'RendererType2',\n    moduleName: CORE,\n};\n// type only\nIdentifiers.ViewDefinition = {\n    name: 'ɵViewDefinition',\n    moduleName: CORE,\n};\nIdentifiers.createComponentFactory = { name: 'ɵccf', moduleName: CORE };\nIdentifiers.setClassMetadata = { name: 'ɵsetClassMetadata', moduleName: CORE };\nfunction createTokenForReference(reference) {\n    return { identifier: { reference: reference } };\n}\nfunction createTokenForExternalReference(reflector, reference) {\n    return createTokenForReference(reflector.resolveExternalReference(reference));\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * A token representing the a reference to a static type.\n *\n * This token is unique for a filePath and name and can be used as a hash table key.\n */\nclass StaticSymbol {\n    constructor(filePath, name, members) {\n        this.filePath = filePath;\n        this.name = name;\n        this.members = members;\n    }\n    assertNoMembers() {\n        if (this.members.length) {\n            throw new Error(`Illegal state: symbol without members expected, but got ${JSON.stringify(this)}.`);\n        }\n    }\n}\n/**\n * A cache of static symbol used by the StaticReflector to return the same symbol for the\n * same symbol values.\n */\nclass StaticSymbolCache {\n    constructor() {\n        this.cache = new Map();\n    }\n    get(declarationFile, name, members) {\n        members = members || [];\n        const memberSuffix = members.length ? `.${members.join('.')}` : '';\n        const key = `\"${declarationFile}\".${name}${memberSuffix}`;\n        let result = this.cache.get(key);\n        if (!result) {\n            result = new StaticSymbol(declarationFile, name, members);\n            this.cache.set(key, result);\n        }\n        return result;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// group 0: \"[prop] or (event) or @trigger\"\n// group 1: \"prop\" from \"[prop]\"\n// group 2: \"event\" from \"(event)\"\n// group 3: \"@trigger\" from \"@trigger\"\nconst HOST_REG_EXP = /^(?:(?:\\[([^\\]]+)\\])|(?:\\(([^\\)]+)\\)))|(\\@[-\\w]+)$/;\nfunction sanitizeIdentifier(name) {\n    return name.replace(/\\W/g, '_');\n}\nlet _anonymousTypeIndex = 0;\nfunction identifierName(compileIdentifier) {\n    if (!compileIdentifier || !compileIdentifier.reference) {\n        return null;\n    }\n    const ref = compileIdentifier.reference;\n    if (ref instanceof StaticSymbol) {\n        return ref.name;\n    }\n    if (ref['__anonymousType']) {\n        return ref['__anonymousType'];\n    }\n    let identifier = stringify(ref);\n    if (identifier.indexOf('(') >= 0) {\n        // case: anonymous functions!\n        identifier = `anonymous_${_anonymousTypeIndex++}`;\n        ref['__anonymousType'] = identifier;\n    }\n    else {\n        identifier = sanitizeIdentifier(identifier);\n    }\n    return identifier;\n}\nfunction identifierModuleUrl(compileIdentifier) {\n    const ref = compileIdentifier.reference;\n    if (ref instanceof StaticSymbol) {\n        return ref.filePath;\n    }\n    // Runtime type\n    return `./${stringify(ref)}`;\n}\nfunction viewClassName(compType, embeddedTemplateIndex) {\n    return `View_${identifierName({ reference: compType })}_${embeddedTemplateIndex}`;\n}\nfunction rendererTypeName(compType) {\n    return `RenderType_${identifierName({ reference: compType })}`;\n}\nfunction hostViewClassName(compType) {\n    return `HostView_${identifierName({ reference: compType })}`;\n}\nfunction componentFactoryName(compType) {\n    return `${identifierName({ reference: compType })}NgFactory`;\n}\nvar CompileSummaryKind;\n(function (CompileSummaryKind) {\n    CompileSummaryKind[CompileSummaryKind[\"Pipe\"] = 0] = \"Pipe\";\n    CompileSummaryKind[CompileSummaryKind[\"Directive\"] = 1] = \"Directive\";\n    CompileSummaryKind[CompileSummaryKind[\"NgModule\"] = 2] = \"NgModule\";\n    CompileSummaryKind[CompileSummaryKind[\"Injectable\"] = 3] = \"Injectable\";\n})(CompileSummaryKind || (CompileSummaryKind = {}));\nfunction tokenName(token) {\n    return token.value != null ? sanitizeIdentifier(token.value) : identifierName(token.identifier);\n}\nfunction tokenReference(token) {\n    if (token.identifier != null) {\n        return token.identifier.reference;\n    }\n    else {\n        return token.value;\n    }\n}\n/**\n * Metadata about a stylesheet\n */\nclass CompileStylesheetMetadata {\n    constructor({ moduleUrl, styles, styleUrls } = {}) {\n        this.moduleUrl = moduleUrl || null;\n        this.styles = _normalizeArray(styles);\n        this.styleUrls = _normalizeArray(styleUrls);\n    }\n}\n/**\n * Metadata regarding compilation of a template.\n */\nclass CompileTemplateMetadata {\n    constructor({ encapsulation, template, templateUrl, htmlAst, styles, styleUrls, externalStylesheets, animations, ngContentSelectors, interpolation, isInline, preserveWhitespaces }) {\n        this.encapsulation = encapsulation;\n        this.template = template;\n        this.templateUrl = templateUrl;\n        this.htmlAst = htmlAst;\n        this.styles = _normalizeArray(styles);\n        this.styleUrls = _normalizeArray(styleUrls);\n        this.externalStylesheets = _normalizeArray(externalStylesheets);\n        this.animations = animations ? flatten(animations) : [];\n        this.ngContentSelectors = ngContentSelectors || [];\n        if (interpolation && interpolation.length != 2) {\n            throw new Error(`'interpolation' should have a start and an end symbol.`);\n        }\n        this.interpolation = interpolation;\n        this.isInline = isInline;\n        this.preserveWhitespaces = preserveWhitespaces;\n    }\n    toSummary() {\n        return {\n            ngContentSelectors: this.ngContentSelectors,\n            encapsulation: this.encapsulation,\n            styles: this.styles,\n            animations: this.animations\n        };\n    }\n}\n/**\n * Metadata regarding compilation of a directive.\n */\nclass CompileDirectiveMetadata {\n    constructor({ isHost, type, isComponent, selector, exportAs, changeDetection, inputs, outputs, hostListeners, hostProperties, hostAttributes, providers, viewProviders, queries, guards, viewQueries, entryComponents, template, componentViewType, rendererType, componentFactory }) {\n        this.isHost = !!isHost;\n        this.type = type;\n        this.isComponent = isComponent;\n        this.selector = selector;\n        this.exportAs = exportAs;\n        this.changeDetection = changeDetection;\n        this.inputs = inputs;\n        this.outputs = outputs;\n        this.hostListeners = hostListeners;\n        this.hostProperties = hostProperties;\n        this.hostAttributes = hostAttributes;\n        this.providers = _normalizeArray(providers);\n        this.viewProviders = _normalizeArray(viewProviders);\n        this.queries = _normalizeArray(queries);\n        this.guards = guards;\n        this.viewQueries = _normalizeArray(viewQueries);\n        this.entryComponents = _normalizeArray(entryComponents);\n        this.template = template;\n        this.componentViewType = componentViewType;\n        this.rendererType = rendererType;\n        this.componentFactory = componentFactory;\n    }\n    static create({ isHost, type, isComponent, selector, exportAs, changeDetection, inputs, outputs, host, providers, viewProviders, queries, guards, viewQueries, entryComponents, template, componentViewType, rendererType, componentFactory }) {\n        const hostListeners = {};\n        const hostProperties = {};\n        const hostAttributes = {};\n        if (host != null) {\n            Object.keys(host).forEach(key => {\n                const value = host[key];\n                const matches = key.match(HOST_REG_EXP);\n                if (matches === null) {\n                    hostAttributes[key] = value;\n                }\n                else if (matches[1] != null) {\n                    hostProperties[matches[1]] = value;\n                }\n                else if (matches[2] != null) {\n                    hostListeners[matches[2]] = value;\n                }\n            });\n        }\n        const inputsMap = {};\n        if (inputs != null) {\n            inputs.forEach((bindConfig) => {\n                // canonical syntax: `dirProp: elProp`\n                // if there is no `:`, use dirProp = elProp\n                const parts = splitAtColon(bindConfig, [bindConfig, bindConfig]);\n                inputsMap[parts[0]] = parts[1];\n            });\n        }\n        const outputsMap = {};\n        if (outputs != null) {\n            outputs.forEach((bindConfig) => {\n                // canonical syntax: `dirProp: elProp`\n                // if there is no `:`, use dirProp = elProp\n                const parts = splitAtColon(bindConfig, [bindConfig, bindConfig]);\n                outputsMap[parts[0]] = parts[1];\n            });\n        }\n        return new CompileDirectiveMetadata({\n            isHost,\n            type,\n            isComponent: !!isComponent,\n            selector,\n            exportAs,\n            changeDetection,\n            inputs: inputsMap,\n            outputs: outputsMap,\n            hostListeners,\n            hostProperties,\n            hostAttributes,\n            providers,\n            viewProviders,\n            queries,\n            guards,\n            viewQueries,\n            entryComponents,\n            template,\n            componentViewType,\n            rendererType,\n            componentFactory,\n        });\n    }\n    toSummary() {\n        return {\n            summaryKind: CompileSummaryKind.Directive,\n            type: this.type,\n            isComponent: this.isComponent,\n            selector: this.selector,\n            exportAs: this.exportAs,\n            inputs: this.inputs,\n            outputs: this.outputs,\n            hostListeners: this.hostListeners,\n            hostProperties: this.hostProperties,\n            hostAttributes: this.hostAttributes,\n            providers: this.providers,\n            viewProviders: this.viewProviders,\n            queries: this.queries,\n            guards: this.guards,\n            viewQueries: this.viewQueries,\n            entryComponents: this.entryComponents,\n            changeDetection: this.changeDetection,\n            template: this.template && this.template.toSummary(),\n            componentViewType: this.componentViewType,\n            rendererType: this.rendererType,\n            componentFactory: this.componentFactory\n        };\n    }\n}\nclass CompilePipeMetadata {\n    constructor({ type, name, pure }) {\n        this.type = type;\n        this.name = name;\n        this.pure = !!pure;\n    }\n    toSummary() {\n        return {\n            summaryKind: CompileSummaryKind.Pipe,\n            type: this.type,\n            name: this.name,\n            pure: this.pure\n        };\n    }\n}\nclass CompileShallowModuleMetadata {\n}\n/**\n * Metadata regarding compilation of a module.\n */\nclass CompileNgModuleMetadata {\n    constructor({ type, providers, declaredDirectives, exportedDirectives, declaredPipes, exportedPipes, entryComponents, bootstrapComponents, importedModules, exportedModules, schemas, transitiveModule, id }) {\n        this.type = type || null;\n        this.declaredDirectives = _normalizeArray(declaredDirectives);\n        this.exportedDirectives = _normalizeArray(exportedDirectives);\n        this.declaredPipes = _normalizeArray(declaredPipes);\n        this.exportedPipes = _normalizeArray(exportedPipes);\n        this.providers = _normalizeArray(providers);\n        this.entryComponents = _normalizeArray(entryComponents);\n        this.bootstrapComponents = _normalizeArray(bootstrapComponents);\n        this.importedModules = _normalizeArray(importedModules);\n        this.exportedModules = _normalizeArray(exportedModules);\n        this.schemas = _normalizeArray(schemas);\n        this.id = id || null;\n        this.transitiveModule = transitiveModule || null;\n    }\n    toSummary() {\n        const module = this.transitiveModule;\n        return {\n            summaryKind: CompileSummaryKind.NgModule,\n            type: this.type,\n            entryComponents: module.entryComponents,\n            providers: module.providers,\n            modules: module.modules,\n            exportedDirectives: module.exportedDirectives,\n            exportedPipes: module.exportedPipes\n        };\n    }\n}\nclass TransitiveCompileNgModuleMetadata {\n    constructor() {\n        this.directivesSet = new Set();\n        this.directives = [];\n        this.exportedDirectivesSet = new Set();\n        this.exportedDirectives = [];\n        this.pipesSet = new Set();\n        this.pipes = [];\n        this.exportedPipesSet = new Set();\n        this.exportedPipes = [];\n        this.modulesSet = new Set();\n        this.modules = [];\n        this.entryComponentsSet = new Set();\n        this.entryComponents = [];\n        this.providers = [];\n    }\n    addProvider(provider, module) {\n        this.providers.push({ provider: provider, module: module });\n    }\n    addDirective(id) {\n        if (!this.directivesSet.has(id.reference)) {\n            this.directivesSet.add(id.reference);\n            this.directives.push(id);\n        }\n    }\n    addExportedDirective(id) {\n        if (!this.exportedDirectivesSet.has(id.reference)) {\n            this.exportedDirectivesSet.add(id.reference);\n            this.exportedDirectives.push(id);\n        }\n    }\n    addPipe(id) {\n        if (!this.pipesSet.has(id.reference)) {\n            this.pipesSet.add(id.reference);\n            this.pipes.push(id);\n        }\n    }\n    addExportedPipe(id) {\n        if (!this.exportedPipesSet.has(id.reference)) {\n            this.exportedPipesSet.add(id.reference);\n            this.exportedPipes.push(id);\n        }\n    }\n    addModule(id) {\n        if (!this.modulesSet.has(id.reference)) {\n            this.modulesSet.add(id.reference);\n            this.modules.push(id);\n        }\n    }\n    addEntryComponent(ec) {\n        if (!this.entryComponentsSet.has(ec.componentType)) {\n            this.entryComponentsSet.add(ec.componentType);\n            this.entryComponents.push(ec);\n        }\n    }\n}\nfunction _normalizeArray(obj) {\n    return obj || [];\n}\nclass ProviderMeta {\n    constructor(token, { useClass, useValue, useExisting, useFactory, deps, multi }) {\n        this.token = token;\n        this.useClass = useClass || null;\n        this.useValue = useValue;\n        this.useExisting = useExisting;\n        this.useFactory = useFactory || null;\n        this.dependencies = deps || null;\n        this.multi = !!multi;\n    }\n}\nfunction flatten(list) {\n    return list.reduce((flat, item) => {\n        const flatItem = Array.isArray(item) ? flatten(item) : item;\n        return flat.concat(flatItem);\n    }, []);\n}\nfunction jitSourceUrl(url) {\n    // Note: We need 3 \"/\" so that ng shows up as a separate domain\n    // in the chrome dev tools.\n    return url.replace(/(\\w+:\\/\\/[\\w:-]+)?(\\/+)?/, 'ng:///');\n}\nfunction templateSourceUrl(ngModuleType, compMeta, templateMeta) {\n    let url;\n    if (templateMeta.isInline) {\n        if (compMeta.type.reference instanceof StaticSymbol) {\n            // Note: a .ts file might contain multiple components with inline templates,\n            // so we need to give them unique urls, as these will be used for sourcemaps.\n            url = `${compMeta.type.reference.filePath}.${compMeta.type.reference.name}.html`;\n        }\n        else {\n            url = `${identifierName(ngModuleType)}/${identifierName(compMeta.type)}.html`;\n        }\n    }\n    else {\n        url = templateMeta.templateUrl;\n    }\n    return compMeta.type.reference instanceof StaticSymbol ? url : jitSourceUrl(url);\n}\nfunction sharedStylesheetJitUrl(meta, id) {\n    const pathParts = meta.moduleUrl.split(/\\/\\\\/g);\n    const baseName = pathParts[pathParts.length - 1];\n    return jitSourceUrl(`css/${id}${baseName}.ngstyle.js`);\n}\nfunction ngModuleJitUrl(moduleMeta) {\n    return jitSourceUrl(`${identifierName(moduleMeta.type)}/module.ngfactory.js`);\n}\nfunction templateJitUrl(ngModuleType, compMeta) {\n    return jitSourceUrl(`${identifierName(ngModuleType)}/${identifierName(compMeta.type)}.ngfactory.js`);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst CORE$1 = '@angular/core';\nclass Identifiers$1 {\n}\n/* Methods */\nIdentifiers$1.NEW_METHOD = 'factory';\nIdentifiers$1.TRANSFORM_METHOD = 'transform';\nIdentifiers$1.PATCH_DEPS = 'patchedDeps';\n/* Instructions */\nIdentifiers$1.namespaceHTML = { name: 'ɵɵnamespaceHTML', moduleName: CORE$1 };\nIdentifiers$1.namespaceMathML = { name: 'ɵɵnamespaceMathML', moduleName: CORE$1 };\nIdentifiers$1.namespaceSVG = { name: 'ɵɵnamespaceSVG', moduleName: CORE$1 };\nIdentifiers$1.element = { name: 'ɵɵelement', moduleName: CORE$1 };\nIdentifiers$1.elementStart = { name: 'ɵɵelementStart', moduleName: CORE$1 };\nIdentifiers$1.elementEnd = { name: 'ɵɵelementEnd', moduleName: CORE$1 };\nIdentifiers$1.advance = { name: 'ɵɵadvance', moduleName: CORE$1 };\nIdentifiers$1.syntheticHostProperty = { name: 'ɵɵsyntheticHostProperty', moduleName: CORE$1 };\nIdentifiers$1.syntheticHostListener = { name: 'ɵɵsyntheticHostListener', moduleName: CORE$1 };\nIdentifiers$1.attribute = { name: 'ɵɵattribute', moduleName: CORE$1 };\nIdentifiers$1.attributeInterpolate1 = { name: 'ɵɵattributeInterpolate1', moduleName: CORE$1 };\nIdentifiers$1.attributeInterpolate2 = { name: 'ɵɵattributeInterpolate2', moduleName: CORE$1 };\nIdentifiers$1.attributeInterpolate3 = { name: 'ɵɵattributeInterpolate3', moduleName: CORE$1 };\nIdentifiers$1.attributeInterpolate4 = { name: 'ɵɵattributeInterpolate4', moduleName: CORE$1 };\nIdentifiers$1.attributeInterpolate5 = { name: 'ɵɵattributeInterpolate5', moduleName: CORE$1 };\nIdentifiers$1.attributeInterpolate6 = { name: 'ɵɵattributeInterpolate6', moduleName: CORE$1 };\nIdentifiers$1.attributeInterpolate7 = { name: 'ɵɵattributeInterpolate7', moduleName: CORE$1 };\nIdentifiers$1.attributeInterpolate8 = { name: 'ɵɵattributeInterpolate8', moduleName: CORE$1 };\nIdentifiers$1.attributeInterpolateV = { name: 'ɵɵattributeInterpolateV', moduleName: CORE$1 };\nIdentifiers$1.classProp = { name: 'ɵɵclassProp', moduleName: CORE$1 };\nIdentifiers$1.elementContainerStart = { name: 'ɵɵelementContainerStart', moduleName: CORE$1 };\nIdentifiers$1.elementContainerEnd = { name: 'ɵɵelementContainerEnd', moduleName: CORE$1 };\nIdentifiers$1.elementContainer = { name: 'ɵɵelementContainer', moduleName: CORE$1 };\nIdentifiers$1.styleMap = { name: 'ɵɵstyleMap', moduleName: CORE$1 };\nIdentifiers$1.styleMapInterpolate1 = { name: 'ɵɵstyleMapInterpolate1', moduleName: CORE$1 };\nIdentifiers$1.styleMapInterpolate2 = { name: 'ɵɵstyleMapInterpolate2', moduleName: CORE$1 };\nIdentifiers$1.styleMapInterpolate3 = { name: 'ɵɵstyleMapInterpolate3', moduleName: CORE$1 };\nIdentifiers$1.styleMapInterpolate4 = { name: 'ɵɵstyleMapInterpolate4', moduleName: CORE$1 };\nIdentifiers$1.styleMapInterpolate5 = { name: 'ɵɵstyleMapInterpolate5', moduleName: CORE$1 };\nIdentifiers$1.styleMapInterpolate6 = { name: 'ɵɵstyleMapInterpolate6', moduleName: CORE$1 };\nIdentifiers$1.styleMapInterpolate7 = { name: 'ɵɵstyleMapInterpolate7', moduleName: CORE$1 };\nIdentifiers$1.styleMapInterpolate8 = { name: 'ɵɵstyleMapInterpolate8', moduleName: CORE$1 };\nIdentifiers$1.styleMapInterpolateV = { name: 'ɵɵstyleMapInterpolateV', moduleName: CORE$1 };\nIdentifiers$1.classMap = { name: 'ɵɵclassMap', moduleName: CORE$1 };\nIdentifiers$1.classMapInterpolate1 = { name: 'ɵɵclassMapInterpolate1', moduleName: CORE$1 };\nIdentifiers$1.classMapInterpolate2 = { name: 'ɵɵclassMapInterpolate2', moduleName: CORE$1 };\nIdentifiers$1.classMapInterpolate3 = { name: 'ɵɵclassMapInterpolate3', moduleName: CORE$1 };\nIdentifiers$1.classMapInterpolate4 = { name: 'ɵɵclassMapInterpolate4', moduleName: CORE$1 };\nIdentifiers$1.classMapInterpolate5 = { name: 'ɵɵclassMapInterpolate5', moduleName: CORE$1 };\nIdentifiers$1.classMapInterpolate6 = { name: 'ɵɵclassMapInterpolate6', moduleName: CORE$1 };\nIdentifiers$1.classMapInterpolate7 = { name: 'ɵɵclassMapInterpolate7', moduleName: CORE$1 };\nIdentifiers$1.classMapInterpolate8 = { name: 'ɵɵclassMapInterpolate8', moduleName: CORE$1 };\nIdentifiers$1.classMapInterpolateV = { name: 'ɵɵclassMapInterpolateV', moduleName: CORE$1 };\nIdentifiers$1.styleProp = { name: 'ɵɵstyleProp', moduleName: CORE$1 };\nIdentifiers$1.stylePropInterpolate1 = { name: 'ɵɵstylePropInterpolate1', moduleName: CORE$1 };\nIdentifiers$1.stylePropInterpolate2 = { name: 'ɵɵstylePropInterpolate2', moduleName: CORE$1 };\nIdentifiers$1.stylePropInterpolate3 = { name: 'ɵɵstylePropInterpolate3', moduleName: CORE$1 };\nIdentifiers$1.stylePropInterpolate4 = { name: 'ɵɵstylePropInterpolate4', moduleName: CORE$1 };\nIdentifiers$1.stylePropInterpolate5 = { name: 'ɵɵstylePropInterpolate5', moduleName: CORE$1 };\nIdentifiers$1.stylePropInterpolate6 = { name: 'ɵɵstylePropInterpolate6', moduleName: CORE$1 };\nIdentifiers$1.stylePropInterpolate7 = { name: 'ɵɵstylePropInterpolate7', moduleName: CORE$1 };\nIdentifiers$1.stylePropInterpolate8 = { name: 'ɵɵstylePropInterpolate8', moduleName: CORE$1 };\nIdentifiers$1.stylePropInterpolateV = { name: 'ɵɵstylePropInterpolateV', moduleName: CORE$1 };\nIdentifiers$1.nextContext = { name: 'ɵɵnextContext', moduleName: CORE$1 };\nIdentifiers$1.templateCreate = { name: 'ɵɵtemplate', moduleName: CORE$1 };\nIdentifiers$1.text = { name: 'ɵɵtext', moduleName: CORE$1 };\nIdentifiers$1.enableBindings = { name: 'ɵɵenableBindings', moduleName: CORE$1 };\nIdentifiers$1.disableBindings = { name: 'ɵɵdisableBindings', moduleName: CORE$1 };\nIdentifiers$1.getCurrentView = { name: 'ɵɵgetCurrentView', moduleName: CORE$1 };\nIdentifiers$1.textInterpolate = { name: 'ɵɵtextInterpolate', moduleName: CORE$1 };\nIdentifiers$1.textInterpolate1 = { name: 'ɵɵtextInterpolate1', moduleName: CORE$1 };\nIdentifiers$1.textInterpolate2 = { name: 'ɵɵtextInterpolate2', moduleName: CORE$1 };\nIdentifiers$1.textInterpolate3 = { name: 'ɵɵtextInterpolate3', moduleName: CORE$1 };\nIdentifiers$1.textInterpolate4 = { name: 'ɵɵtextInterpolate4', moduleName: CORE$1 };\nIdentifiers$1.textInterpolate5 = { name: 'ɵɵtextInterpolate5', moduleName: CORE$1 };\nIdentifiers$1.textInterpolate6 = { name: 'ɵɵtextInterpolate6', moduleName: CORE$1 };\nIdentifiers$1.textInterpolate7 = { name: 'ɵɵtextInterpolate7', moduleName: CORE$1 };\nIdentifiers$1.textInterpolate8 = { name: 'ɵɵtextInterpolate8', moduleName: CORE$1 };\nIdentifiers$1.textInterpolateV = { name: 'ɵɵtextInterpolateV', moduleName: CORE$1 };\nIdentifiers$1.restoreView = { name: 'ɵɵrestoreView', moduleName: CORE$1 };\nIdentifiers$1.pureFunction0 = { name: 'ɵɵpureFunction0', moduleName: CORE$1 };\nIdentifiers$1.pureFunction1 = { name: 'ɵɵpureFunction1', moduleName: CORE$1 };\nIdentifiers$1.pureFunction2 = { name: 'ɵɵpureFunction2', moduleName: CORE$1 };\nIdentifiers$1.pureFunction3 = { name: 'ɵɵpureFunction3', moduleName: CORE$1 };\nIdentifiers$1.pureFunction4 = { name: 'ɵɵpureFunction4', moduleName: CORE$1 };\nIdentifiers$1.pureFunction5 = { name: 'ɵɵpureFunction5', moduleName: CORE$1 };\nIdentifiers$1.pureFunction6 = { name: 'ɵɵpureFunction6', moduleName: CORE$1 };\nIdentifiers$1.pureFunction7 = { name: 'ɵɵpureFunction7', moduleName: CORE$1 };\nIdentifiers$1.pureFunction8 = { name: 'ɵɵpureFunction8', moduleName: CORE$1 };\nIdentifiers$1.pureFunctionV = { name: 'ɵɵpureFunctionV', moduleName: CORE$1 };\nIdentifiers$1.pipeBind1 = { name: 'ɵɵpipeBind1', moduleName: CORE$1 };\nIdentifiers$1.pipeBind2 = { name: 'ɵɵpipeBind2', moduleName: CORE$1 };\nIdentifiers$1.pipeBind3 = { name: 'ɵɵpipeBind3', moduleName: CORE$1 };\nIdentifiers$1.pipeBind4 = { name: 'ɵɵpipeBind4', moduleName: CORE$1 };\nIdentifiers$1.pipeBindV = { name: 'ɵɵpipeBindV', moduleName: CORE$1 };\nIdentifiers$1.hostProperty = { name: 'ɵɵhostProperty', moduleName: CORE$1 };\nIdentifiers$1.property = { name: 'ɵɵproperty', moduleName: CORE$1 };\nIdentifiers$1.propertyInterpolate = { name: 'ɵɵpropertyInterpolate', moduleName: CORE$1 };\nIdentifiers$1.propertyInterpolate1 = { name: 'ɵɵpropertyInterpolate1', moduleName: CORE$1 };\nIdentifiers$1.propertyInterpolate2 = { name: 'ɵɵpropertyInterpolate2', moduleName: CORE$1 };\nIdentifiers$1.propertyInterpolate3 = { name: 'ɵɵpropertyInterpolate3', moduleName: CORE$1 };\nIdentifiers$1.propertyInterpolate4 = { name: 'ɵɵpropertyInterpolate4', moduleName: CORE$1 };\nIdentifiers$1.propertyInterpolate5 = { name: 'ɵɵpropertyInterpolate5', moduleName: CORE$1 };\nIdentifiers$1.propertyInterpolate6 = { name: 'ɵɵpropertyInterpolate6', moduleName: CORE$1 };\nIdentifiers$1.propertyInterpolate7 = { name: 'ɵɵpropertyInterpolate7', moduleName: CORE$1 };\nIdentifiers$1.propertyInterpolate8 = { name: 'ɵɵpropertyInterpolate8', moduleName: CORE$1 };\nIdentifiers$1.propertyInterpolateV = { name: 'ɵɵpropertyInterpolateV', moduleName: CORE$1 };\nIdentifiers$1.i18n = { name: 'ɵɵi18n', moduleName: CORE$1 };\nIdentifiers$1.i18nAttributes = { name: 'ɵɵi18nAttributes', moduleName: CORE$1 };\nIdentifiers$1.i18nExp = { name: 'ɵɵi18nExp', moduleName: CORE$1 };\nIdentifiers$1.i18nStart = { name: 'ɵɵi18nStart', moduleName: CORE$1 };\nIdentifiers$1.i18nEnd = { name: 'ɵɵi18nEnd', moduleName: CORE$1 };\nIdentifiers$1.i18nApply = { name: 'ɵɵi18nApply', moduleName: CORE$1 };\nIdentifiers$1.i18nPostprocess = { name: 'ɵɵi18nPostprocess', moduleName: CORE$1 };\nIdentifiers$1.pipe = { name: 'ɵɵpipe', moduleName: CORE$1 };\nIdentifiers$1.projection = { name: 'ɵɵprojection', moduleName: CORE$1 };\nIdentifiers$1.projectionDef = { name: 'ɵɵprojectionDef', moduleName: CORE$1 };\nIdentifiers$1.reference = { name: 'ɵɵreference', moduleName: CORE$1 };\nIdentifiers$1.inject = { name: 'ɵɵinject', moduleName: CORE$1 };\nIdentifiers$1.injectAttribute = { name: 'ɵɵinjectAttribute', moduleName: CORE$1 };\nIdentifiers$1.injectPipeChangeDetectorRef = { name: 'ɵɵinjectPipeChangeDetectorRef', moduleName: CORE$1 };\nIdentifiers$1.directiveInject = { name: 'ɵɵdirectiveInject', moduleName: CORE$1 };\nIdentifiers$1.invalidFactory = { name: 'ɵɵinvalidFactory', moduleName: CORE$1 };\nIdentifiers$1.invalidFactoryDep = { name: 'ɵɵinvalidFactoryDep', moduleName: CORE$1 };\nIdentifiers$1.templateRefExtractor = { name: 'ɵɵtemplateRefExtractor', moduleName: CORE$1 };\nIdentifiers$1.resolveWindow = { name: 'ɵɵresolveWindow', moduleName: CORE$1 };\nIdentifiers$1.resolveDocument = { name: 'ɵɵresolveDocument', moduleName: CORE$1 };\nIdentifiers$1.resolveBody = { name: 'ɵɵresolveBody', moduleName: CORE$1 };\nIdentifiers$1.defineComponent = { name: 'ɵɵdefineComponent', moduleName: CORE$1 };\nIdentifiers$1.setComponentScope = { name: 'ɵɵsetComponentScope', moduleName: CORE$1 };\nIdentifiers$1.ComponentDefWithMeta = {\n    name: 'ɵɵComponentDefWithMeta',\n    moduleName: CORE$1,\n};\nIdentifiers$1.FactoryDef = {\n    name: 'ɵɵFactoryDef',\n    moduleName: CORE$1,\n};\nIdentifiers$1.defineDirective = {\n    name: 'ɵɵdefineDirective',\n    moduleName: CORE$1,\n};\nIdentifiers$1.DirectiveDefWithMeta = {\n    name: 'ɵɵDirectiveDefWithMeta',\n    moduleName: CORE$1,\n};\nIdentifiers$1.InjectorDef = {\n    name: 'ɵɵInjectorDef',\n    moduleName: CORE$1,\n};\nIdentifiers$1.defineInjector = {\n    name: 'ɵɵdefineInjector',\n    moduleName: CORE$1,\n};\nIdentifiers$1.NgModuleDefWithMeta = {\n    name: 'ɵɵNgModuleDefWithMeta',\n    moduleName: CORE$1,\n};\nIdentifiers$1.ModuleWithProviders = {\n    name: 'ModuleWithProviders',\n    moduleName: CORE$1,\n};\nIdentifiers$1.defineNgModule = { name: 'ɵɵdefineNgModule', moduleName: CORE$1 };\nIdentifiers$1.setNgModuleScope = { name: 'ɵɵsetNgModuleScope', moduleName: CORE$1 };\nIdentifiers$1.PipeDefWithMeta = { name: 'ɵɵPipeDefWithMeta', moduleName: CORE$1 };\nIdentifiers$1.definePipe = { name: 'ɵɵdefinePipe', moduleName: CORE$1 };\nIdentifiers$1.queryRefresh = { name: 'ɵɵqueryRefresh', moduleName: CORE$1 };\nIdentifiers$1.viewQuery = { name: 'ɵɵviewQuery', moduleName: CORE$1 };\nIdentifiers$1.staticViewQuery = { name: 'ɵɵstaticViewQuery', moduleName: CORE$1 };\nIdentifiers$1.staticContentQuery = { name: 'ɵɵstaticContentQuery', moduleName: CORE$1 };\nIdentifiers$1.loadQuery = { name: 'ɵɵloadQuery', moduleName: CORE$1 };\nIdentifiers$1.contentQuery = { name: 'ɵɵcontentQuery', moduleName: CORE$1 };\nIdentifiers$1.NgOnChangesFeature = { name: 'ɵɵNgOnChangesFeature', moduleName: CORE$1 };\nIdentifiers$1.InheritDefinitionFeature = { name: 'ɵɵInheritDefinitionFeature', moduleName: CORE$1 };\nIdentifiers$1.CopyDefinitionFeature = { name: 'ɵɵCopyDefinitionFeature', moduleName: CORE$1 };\nIdentifiers$1.ProvidersFeature = { name: 'ɵɵProvidersFeature', moduleName: CORE$1 };\nIdentifiers$1.listener = { name: 'ɵɵlistener', moduleName: CORE$1 };\nIdentifiers$1.getFactoryOf = {\n    name: 'ɵɵgetFactoryOf',\n    moduleName: CORE$1,\n};\nIdentifiers$1.getInheritedFactory = {\n    name: 'ɵɵgetInheritedFactory',\n    moduleName: CORE$1,\n};\n// sanitization-related functions\nIdentifiers$1.sanitizeHtml = { name: 'ɵɵsanitizeHtml', moduleName: CORE$1 };\nIdentifiers$1.sanitizeStyle = { name: 'ɵɵsanitizeStyle', moduleName: CORE$1 };\nIdentifiers$1.sanitizeResourceUrl = { name: 'ɵɵsanitizeResourceUrl', moduleName: CORE$1 };\nIdentifiers$1.sanitizeScript = { name: 'ɵɵsanitizeScript', moduleName: CORE$1 };\nIdentifiers$1.sanitizeUrl = { name: 'ɵɵsanitizeUrl', moduleName: CORE$1 };\nIdentifiers$1.sanitizeUrlOrResourceUrl = { name: 'ɵɵsanitizeUrlOrResourceUrl', moduleName: CORE$1 };\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Convert an object map with `Expression` values into a `LiteralMapExpr`.\n */\nfunction mapToMapExpression(map) {\n    const result = Object.keys(map).map(key => ({\n        key,\n        // The assertion here is because really TypeScript doesn't allow us to express that if the\n        // key is present, it will have a value, but this is true in reality.\n        value: map[key],\n        quoted: false,\n    }));\n    return literalMap(result);\n}\n/**\n * Convert metadata into an `Expression` in the given `OutputContext`.\n *\n * This operation will handle arrays, references to symbols, or literal `null` or `undefined`.\n */\nfunction convertMetaToOutput(meta, ctx) {\n    if (Array.isArray(meta)) {\n        return literalArr(meta.map(entry => convertMetaToOutput(entry, ctx)));\n    }\n    if (meta instanceof StaticSymbol) {\n        return ctx.importExpr(meta);\n    }\n    if (meta == null) {\n        return literal(meta);\n    }\n    throw new Error(`Internal error: Unsupported or unknown metadata: ${meta}`);\n}\nfunction typeWithParameters(type, numParams) {\n    if (numParams === 0) {\n        return expressionType(type);\n    }\n    const params = [];\n    for (let i = 0; i < numParams; i++) {\n        params.push(DYNAMIC_TYPE);\n    }\n    return expressionType(type, undefined, params);\n}\nconst ANIMATE_SYMBOL_PREFIX = '@';\nfunction prepareSyntheticPropertyName(name) {\n    return `${ANIMATE_SYMBOL_PREFIX}${name}`;\n}\nfunction prepareSyntheticListenerName(name, phase) {\n    return `${ANIMATE_SYMBOL_PREFIX}${name}.${phase}`;\n}\nfunction isSyntheticPropertyOrListener(name) {\n    return name.charAt(0) == ANIMATE_SYMBOL_PREFIX;\n}\nfunction getSyntheticPropertyName(name) {\n    // this will strip out listener phase values...\n    // @foo.start => @foo\n    const i = name.indexOf('.');\n    name = i > 0 ? name.substring(0, i) : name;\n    if (name.charAt(0) !== ANIMATE_SYMBOL_PREFIX) {\n        name = ANIMATE_SYMBOL_PREFIX + name;\n    }\n    return name;\n}\nfunction prepareSyntheticListenerFunctionName(name, phase) {\n    return `animation_${name}_${phase}`;\n}\nfunction jitOnlyGuardedExpression(expr) {\n    const ngJitMode = new ExternalExpr({ name: 'ngJitMode', moduleName: null });\n    const jitFlagNotDefined = new BinaryOperatorExpr(BinaryOperator.Identical, new TypeofExpr(ngJitMode), literal('undefined'));\n    const jitFlagUndefinedOrTrue = new BinaryOperatorExpr(BinaryOperator.Or, jitFlagNotDefined, ngJitMode, /* type */ undefined, \n    /* sourceSpan */ undefined, true);\n    return new BinaryOperatorExpr(BinaryOperator.And, jitFlagUndefinedOrTrue, expr);\n}\nfunction wrapReference(value) {\n    const wrapped = new WrappedNodeExpr(value);\n    return { value: wrapped, type: wrapped };\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst $EOF = 0;\nconst $BSPACE = 8;\nconst $TAB = 9;\nconst $LF = 10;\nconst $VTAB = 11;\nconst $FF = 12;\nconst $CR = 13;\nconst $SPACE = 32;\nconst $BANG = 33;\nconst $DQ = 34;\nconst $HASH = 35;\nconst $$ = 36;\nconst $PERCENT = 37;\nconst $AMPERSAND = 38;\nconst $SQ = 39;\nconst $LPAREN = 40;\nconst $RPAREN = 41;\nconst $STAR = 42;\nconst $PLUS = 43;\nconst $COMMA = 44;\nconst $MINUS = 45;\nconst $PERIOD = 46;\nconst $SLASH = 47;\nconst $COLON = 58;\nconst $SEMICOLON = 59;\nconst $LT = 60;\nconst $EQ = 61;\nconst $GT = 62;\nconst $QUESTION = 63;\nconst $0 = 48;\nconst $7 = 55;\nconst $9 = 57;\nconst $A = 65;\nconst $E = 69;\nconst $F = 70;\nconst $X = 88;\nconst $Z = 90;\nconst $LBRACKET = 91;\nconst $BACKSLASH = 92;\nconst $RBRACKET = 93;\nconst $CARET = 94;\nconst $_ = 95;\nconst $a = 97;\nconst $b = 98;\nconst $e = 101;\nconst $f = 102;\nconst $n = 110;\nconst $r = 114;\nconst $t = 116;\nconst $u = 117;\nconst $v = 118;\nconst $x = 120;\nconst $z = 122;\nconst $LBRACE = 123;\nconst $BAR = 124;\nconst $RBRACE = 125;\nconst $NBSP = 160;\nconst $PIPE = 124;\nconst $TILDA = 126;\nconst $AT = 64;\nconst $BT = 96;\nfunction isWhitespace(code) {\n    return (code >= $TAB && code <= $SPACE) || (code == $NBSP);\n}\nfunction isDigit(code) {\n    return $0 <= code && code <= $9;\n}\nfunction isAsciiLetter(code) {\n    return code >= $a && code <= $z || code >= $A && code <= $Z;\n}\nfunction isAsciiHexDigit(code) {\n    return code >= $a && code <= $f || code >= $A && code <= $F || isDigit(code);\n}\nfunction isNewLine(code) {\n    return code === $LF || code === $CR;\n}\nfunction isOctalDigit(code) {\n    return $0 <= code && code <= $7;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass ParseLocation {\n    constructor(file, offset, line, col) {\n        this.file = file;\n        this.offset = offset;\n        this.line = line;\n        this.col = col;\n    }\n    toString() {\n        return this.offset != null ? `${this.file.url}@${this.line}:${this.col}` : this.file.url;\n    }\n    moveBy(delta) {\n        const source = this.file.content;\n        const len = source.length;\n        let offset = this.offset;\n        let line = this.line;\n        let col = this.col;\n        while (offset > 0 && delta < 0) {\n            offset--;\n            delta++;\n            const ch = source.charCodeAt(offset);\n            if (ch == $LF) {\n                line--;\n                const priorLine = source.substr(0, offset - 1).lastIndexOf(String.fromCharCode($LF));\n                col = priorLine > 0 ? offset - priorLine : offset;\n            }\n            else {\n                col--;\n            }\n        }\n        while (offset < len && delta > 0) {\n            const ch = source.charCodeAt(offset);\n            offset++;\n            delta--;\n            if (ch == $LF) {\n                line++;\n                col = 0;\n            }\n            else {\n                col++;\n            }\n        }\n        return new ParseLocation(this.file, offset, line, col);\n    }\n    // Return the source around the location\n    // Up to `maxChars` or `maxLines` on each side of the location\n    getContext(maxChars, maxLines) {\n        const content = this.file.content;\n        let startOffset = this.offset;\n        if (startOffset != null) {\n            if (startOffset > content.length - 1) {\n                startOffset = content.length - 1;\n            }\n            let endOffset = startOffset;\n            let ctxChars = 0;\n            let ctxLines = 0;\n            while (ctxChars < maxChars && startOffset > 0) {\n                startOffset--;\n                ctxChars++;\n                if (content[startOffset] == '\\n') {\n                    if (++ctxLines == maxLines) {\n                        break;\n                    }\n                }\n            }\n            ctxChars = 0;\n            ctxLines = 0;\n            while (ctxChars < maxChars && endOffset < content.length - 1) {\n                endOffset++;\n                ctxChars++;\n                if (content[endOffset] == '\\n') {\n                    if (++ctxLines == maxLines) {\n                        break;\n                    }\n                }\n            }\n            return {\n                before: content.substring(startOffset, this.offset),\n                after: content.substring(this.offset, endOffset + 1),\n            };\n        }\n        return null;\n    }\n}\nclass ParseSourceFile {\n    constructor(content, url) {\n        this.content = content;\n        this.url = url;\n    }\n}\nclass ParseSourceSpan {\n    constructor(start, end, details = null) {\n        this.start = start;\n        this.end = end;\n        this.details = details;\n    }\n    toString() {\n        return this.start.file.content.substring(this.start.offset, this.end.offset);\n    }\n}\nvar ParseErrorLevel;\n(function (ParseErrorLevel) {\n    ParseErrorLevel[ParseErrorLevel[\"WARNING\"] = 0] = \"WARNING\";\n    ParseErrorLevel[ParseErrorLevel[\"ERROR\"] = 1] = \"ERROR\";\n})(ParseErrorLevel || (ParseErrorLevel = {}));\nclass ParseError {\n    constructor(span, msg, level = ParseErrorLevel.ERROR) {\n        this.span = span;\n        this.msg = msg;\n        this.level = level;\n    }\n    contextualMessage() {\n        const ctx = this.span.start.getContext(100, 3);\n        return ctx ? `${this.msg} (\"${ctx.before}[${ParseErrorLevel[this.level]} ->]${ctx.after}\")` :\n            this.msg;\n    }\n    toString() {\n        const details = this.span.details ? `, ${this.span.details}` : '';\n        return `${this.contextualMessage()}: ${this.span.start}${details}`;\n    }\n}\nfunction typeSourceSpan(kind, type) {\n    const moduleUrl = identifierModuleUrl(type);\n    const sourceFileName = moduleUrl != null ? `in ${kind} ${identifierName(type)} in ${moduleUrl}` :\n        `in ${kind} ${identifierName(type)}`;\n    const sourceFile = new ParseSourceFile('', sourceFileName);\n    return new ParseSourceSpan(new ParseLocation(sourceFile, -1, -1, -1), new ParseLocation(sourceFile, -1, -1, -1));\n}\n/**\n * Generates Source Span object for a given R3 Type for JIT mode.\n *\n * @param kind Component or Directive.\n * @param typeName name of the Component or Directive.\n * @param sourceUrl reference to Component or Directive source.\n * @returns instance of ParseSourceSpan that represent a given Component or Directive.\n */\nfunction r3JitTypeSourceSpan(kind, typeName, sourceUrl) {\n    const sourceFileName = `in ${kind} ${typeName} in ${sourceUrl}`;\n    const sourceFile = new ParseSourceFile('', sourceFileName);\n    return new ParseSourceSpan(new ParseLocation(sourceFile, -1, -1, -1), new ParseLocation(sourceFile, -1, -1, -1));\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass Text {\n    constructor(value, sourceSpan) {\n        this.value = value;\n        this.sourceSpan = sourceSpan;\n    }\n    visit(visitor) {\n        return visitor.visitText(this);\n    }\n}\nclass BoundText {\n    constructor(value, sourceSpan, i18n) {\n        this.value = value;\n        this.sourceSpan = sourceSpan;\n        this.i18n = i18n;\n    }\n    visit(visitor) {\n        return visitor.visitBoundText(this);\n    }\n}\nclass TextAttribute {\n    constructor(name, value, sourceSpan, valueSpan, i18n) {\n        this.name = name;\n        this.value = value;\n        this.sourceSpan = sourceSpan;\n        this.valueSpan = valueSpan;\n        this.i18n = i18n;\n    }\n    visit(visitor) {\n        return visitor.visitTextAttribute(this);\n    }\n}\nclass BoundAttribute {\n    constructor(name, type, securityContext, value, unit, sourceSpan, valueSpan, i18n) {\n        this.name = name;\n        this.type = type;\n        this.securityContext = securityContext;\n        this.value = value;\n        this.unit = unit;\n        this.sourceSpan = sourceSpan;\n        this.valueSpan = valueSpan;\n        this.i18n = i18n;\n    }\n    static fromBoundElementProperty(prop, i18n) {\n        return new BoundAttribute(prop.name, prop.type, prop.securityContext, prop.value, prop.unit, prop.sourceSpan, prop.valueSpan, i18n);\n    }\n    visit(visitor) {\n        return visitor.visitBoundAttribute(this);\n    }\n}\nclass BoundEvent {\n    constructor(name, type, handler, target, phase, sourceSpan, handlerSpan) {\n        this.name = name;\n        this.type = type;\n        this.handler = handler;\n        this.target = target;\n        this.phase = phase;\n        this.sourceSpan = sourceSpan;\n        this.handlerSpan = handlerSpan;\n    }\n    static fromParsedEvent(event) {\n        const target = event.type === 0 /* Regular */ ? event.targetOrPhase : null;\n        const phase = event.type === 1 /* Animation */ ? event.targetOrPhase : null;\n        return new BoundEvent(event.name, event.type, event.handler, target, phase, event.sourceSpan, event.handlerSpan);\n    }\n    visit(visitor) {\n        return visitor.visitBoundEvent(this);\n    }\n}\nclass Element {\n    constructor(name, attributes, inputs, outputs, children, references, sourceSpan, startSourceSpan, endSourceSpan, i18n) {\n        this.name = name;\n        this.attributes = attributes;\n        this.inputs = inputs;\n        this.outputs = outputs;\n        this.children = children;\n        this.references = references;\n        this.sourceSpan = sourceSpan;\n        this.startSourceSpan = startSourceSpan;\n        this.endSourceSpan = endSourceSpan;\n        this.i18n = i18n;\n        // If the element is empty then the source span should include any closing tag\n        if (children.length === 0 && startSourceSpan && endSourceSpan) {\n            this.sourceSpan = new ParseSourceSpan(sourceSpan.start, endSourceSpan.end);\n        }\n    }\n    visit(visitor) {\n        return visitor.visitElement(this);\n    }\n}\nclass Template {\n    constructor(tagName, attributes, inputs, outputs, templateAttrs, children, references, variables, sourceSpan, startSourceSpan, endSourceSpan, i18n) {\n        this.tagName = tagName;\n        this.attributes = attributes;\n        this.inputs = inputs;\n        this.outputs = outputs;\n        this.templateAttrs = templateAttrs;\n        this.children = children;\n        this.references = references;\n        this.variables = variables;\n        this.sourceSpan = sourceSpan;\n        this.startSourceSpan = startSourceSpan;\n        this.endSourceSpan = endSourceSpan;\n        this.i18n = i18n;\n    }\n    visit(visitor) {\n        return visitor.visitTemplate(this);\n    }\n}\nclass Content {\n    constructor(selector, attributes, sourceSpan, i18n) {\n        this.selector = selector;\n        this.attributes = attributes;\n        this.sourceSpan = sourceSpan;\n        this.i18n = i18n;\n        this.name = 'ng-content';\n    }\n    visit(visitor) {\n        return visitor.visitContent(this);\n    }\n}\nclass Variable {\n    constructor(name, value, sourceSpan, valueSpan) {\n        this.name = name;\n        this.value = value;\n        this.sourceSpan = sourceSpan;\n        this.valueSpan = valueSpan;\n    }\n    visit(visitor) {\n        return visitor.visitVariable(this);\n    }\n}\nclass Reference {\n    constructor(name, value, sourceSpan, valueSpan) {\n        this.name = name;\n        this.value = value;\n        this.sourceSpan = sourceSpan;\n        this.valueSpan = valueSpan;\n    }\n    visit(visitor) {\n        return visitor.visitReference(this);\n    }\n}\nclass Icu {\n    constructor(vars, placeholders, sourceSpan, i18n) {\n        this.vars = vars;\n        this.placeholders = placeholders;\n        this.sourceSpan = sourceSpan;\n        this.i18n = i18n;\n    }\n    visit(visitor) {\n        return visitor.visitIcu(this);\n    }\n}\nclass NullVisitor {\n    visitElement(element) { }\n    visitTemplate(template) { }\n    visitContent(content) { }\n    visitVariable(variable) { }\n    visitReference(reference) { }\n    visitTextAttribute(attribute) { }\n    visitBoundAttribute(attribute) { }\n    visitBoundEvent(attribute) { }\n    visitText(text) { }\n    visitBoundText(text) { }\n    visitIcu(icu) { }\n}\nclass RecursiveVisitor {\n    visitElement(element) {\n        visitAll(this, element.attributes);\n        visitAll(this, element.children);\n        visitAll(this, element.references);\n    }\n    visitTemplate(template) {\n        visitAll(this, template.attributes);\n        visitAll(this, template.children);\n        visitAll(this, template.references);\n        visitAll(this, template.variables);\n    }\n    visitContent(content) { }\n    visitVariable(variable) { }\n    visitReference(reference) { }\n    visitTextAttribute(attribute) { }\n    visitBoundAttribute(attribute) { }\n    visitBoundEvent(attribute) { }\n    visitText(text) { }\n    visitBoundText(text) { }\n    visitIcu(icu) { }\n}\nclass TransformVisitor {\n    visitElement(element) {\n        const newAttributes = transformAll(this, element.attributes);\n        const newInputs = transformAll(this, element.inputs);\n        const newOutputs = transformAll(this, element.outputs);\n        const newChildren = transformAll(this, element.children);\n        const newReferences = transformAll(this, element.references);\n        if (newAttributes != element.attributes || newInputs != element.inputs ||\n            newOutputs != element.outputs || newChildren != element.children ||\n            newReferences != element.references) {\n            return new Element(element.name, newAttributes, newInputs, newOutputs, newChildren, newReferences, element.sourceSpan, element.startSourceSpan, element.endSourceSpan);\n        }\n        return element;\n    }\n    visitTemplate(template) {\n        const newAttributes = transformAll(this, template.attributes);\n        const newInputs = transformAll(this, template.inputs);\n        const newOutputs = transformAll(this, template.outputs);\n        const newTemplateAttrs = transformAll(this, template.templateAttrs);\n        const newChildren = transformAll(this, template.children);\n        const newReferences = transformAll(this, template.references);\n        const newVariables = transformAll(this, template.variables);\n        if (newAttributes != template.attributes || newInputs != template.inputs ||\n            newOutputs != template.outputs || newTemplateAttrs != template.templateAttrs ||\n            newChildren != template.children || newReferences != template.references ||\n            newVariables != template.variables) {\n            return new Template(template.tagName, newAttributes, newInputs, newOutputs, newTemplateAttrs, newChildren, newReferences, newVariables, template.sourceSpan, template.startSourceSpan, template.endSourceSpan);\n        }\n        return template;\n    }\n    visitContent(content) {\n        return content;\n    }\n    visitVariable(variable) {\n        return variable;\n    }\n    visitReference(reference) {\n        return reference;\n    }\n    visitTextAttribute(attribute) {\n        return attribute;\n    }\n    visitBoundAttribute(attribute) {\n        return attribute;\n    }\n    visitBoundEvent(attribute) {\n        return attribute;\n    }\n    visitText(text) {\n        return text;\n    }\n    visitBoundText(text) {\n        return text;\n    }\n    visitIcu(icu) {\n        return icu;\n    }\n}\nfunction visitAll(visitor, nodes) {\n    const result = [];\n    if (visitor.visit) {\n        for (const node of nodes) {\n            const newNode = visitor.visit(node) || node.visit(visitor);\n        }\n    }\n    else {\n        for (const node of nodes) {\n            const newNode = node.visit(visitor);\n            if (newNode) {\n                result.push(newNode);\n            }\n        }\n    }\n    return result;\n}\nfunction transformAll(visitor, nodes) {\n    const result = [];\n    let changed = false;\n    for (const node of nodes) {\n        const newNode = node.visit(visitor);\n        if (newNode) {\n            result.push(newNode);\n        }\n        changed = changed || newNode != node;\n    }\n    return changed ? result : nodes;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass Message {\n    /**\n     * @param nodes message AST\n     * @param placeholders maps placeholder names to static content\n     * @param placeholderToMessage maps placeholder names to messages (used for nested ICU messages)\n     * @param meaning\n     * @param description\n     * @param customId\n     */\n    constructor(nodes, placeholders, placeholderToMessage, meaning, description, customId) {\n        this.nodes = nodes;\n        this.placeholders = placeholders;\n        this.placeholderToMessage = placeholderToMessage;\n        this.meaning = meaning;\n        this.description = description;\n        this.customId = customId;\n        this.id = this.customId;\n        /** The ids to use if there are no custom id and if `i18nLegacyMessageIdFormat` is not empty */\n        this.legacyIds = [];\n        if (nodes.length) {\n            this.sources = [{\n                    filePath: nodes[0].sourceSpan.start.file.url,\n                    startLine: nodes[0].sourceSpan.start.line + 1,\n                    startCol: nodes[0].sourceSpan.start.col + 1,\n                    endLine: nodes[nodes.length - 1].sourceSpan.end.line + 1,\n                    endCol: nodes[0].sourceSpan.start.col + 1\n                }];\n        }\n        else {\n            this.sources = [];\n        }\n    }\n}\nclass Text$1 {\n    constructor(value, sourceSpan) {\n        this.value = value;\n        this.sourceSpan = sourceSpan;\n    }\n    visit(visitor, context) {\n        return visitor.visitText(this, context);\n    }\n}\n// TODO(vicb): do we really need this node (vs an array) ?\nclass Container {\n    constructor(children, sourceSpan) {\n        this.children = children;\n        this.sourceSpan = sourceSpan;\n    }\n    visit(visitor, context) {\n        return visitor.visitContainer(this, context);\n    }\n}\nclass Icu$1 {\n    constructor(expression, type, cases, sourceSpan) {\n        this.expression = expression;\n        this.type = type;\n        this.cases = cases;\n        this.sourceSpan = sourceSpan;\n    }\n    visit(visitor, context) {\n        return visitor.visitIcu(this, context);\n    }\n}\nclass TagPlaceholder {\n    constructor(tag, attrs, startName, closeName, children, isVoid, \n    // TODO sourceSpan should cover all (we need a startSourceSpan and endSourceSpan)\n    sourceSpan, startSourceSpan, endSourceSpan) {\n        this.tag = tag;\n        this.attrs = attrs;\n        this.startName = startName;\n        this.closeName = closeName;\n        this.children = children;\n        this.isVoid = isVoid;\n        this.sourceSpan = sourceSpan;\n        this.startSourceSpan = startSourceSpan;\n        this.endSourceSpan = endSourceSpan;\n    }\n    visit(visitor, context) {\n        return visitor.visitTagPlaceholder(this, context);\n    }\n}\nclass Placeholder {\n    constructor(value, name, sourceSpan) {\n        this.value = value;\n        this.name = name;\n        this.sourceSpan = sourceSpan;\n    }\n    visit(visitor, context) {\n        return visitor.visitPlaceholder(this, context);\n    }\n}\nclass IcuPlaceholder {\n    constructor(value, name, sourceSpan) {\n        this.value = value;\n        this.name = name;\n        this.sourceSpan = sourceSpan;\n    }\n    visit(visitor, context) {\n        return visitor.visitIcuPlaceholder(this, context);\n    }\n}\n// Clone the AST\nclass CloneVisitor {\n    visitText(text, context) {\n        return new Text$1(text.value, text.sourceSpan);\n    }\n    visitContainer(container, context) {\n        const children = container.children.map(n => n.visit(this, context));\n        return new Container(children, container.sourceSpan);\n    }\n    visitIcu(icu, context) {\n        const cases = {};\n        Object.keys(icu.cases).forEach(key => cases[key] = icu.cases[key].visit(this, context));\n        const msg = new Icu$1(icu.expression, icu.type, cases, icu.sourceSpan);\n        msg.expressionPlaceholder = icu.expressionPlaceholder;\n        return msg;\n    }\n    visitTagPlaceholder(ph, context) {\n        const children = ph.children.map(n => n.visit(this, context));\n        return new TagPlaceholder(ph.tag, ph.attrs, ph.startName, ph.closeName, children, ph.isVoid, ph.sourceSpan, ph.startSourceSpan, ph.endSourceSpan);\n    }\n    visitPlaceholder(ph, context) {\n        return new Placeholder(ph.value, ph.name, ph.sourceSpan);\n    }\n    visitIcuPlaceholder(ph, context) {\n        return new IcuPlaceholder(ph.value, ph.name, ph.sourceSpan);\n    }\n}\n// Visit all the nodes recursively\nclass RecurseVisitor {\n    visitText(text, context) { }\n    visitContainer(container, context) {\n        container.children.forEach(child => child.visit(this));\n    }\n    visitIcu(icu, context) {\n        Object.keys(icu.cases).forEach(k => {\n            icu.cases[k].visit(this);\n        });\n    }\n    visitTagPlaceholder(ph, context) {\n        ph.children.forEach(child => child.visit(this));\n    }\n    visitPlaceholder(ph, context) { }\n    visitIcuPlaceholder(ph, context) { }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Return the message id or compute it using the XLIFF1 digest.\n */\nfunction digest(message) {\n    return message.id || computeDigest(message);\n}\n/**\n * Compute the message id using the XLIFF1 digest.\n */\nfunction computeDigest(message) {\n    return sha1(serializeNodes(message.nodes).join('') + `[${message.meaning}]`);\n}\n/**\n * Return the message id or compute it using the XLIFF2/XMB/$localize digest.\n */\nfunction decimalDigest(message) {\n    return message.id || computeDecimalDigest(message);\n}\n/**\n * Compute the message id using the XLIFF2/XMB/$localize digest.\n */\nfunction computeDecimalDigest(message) {\n    const visitor = new _SerializerIgnoreIcuExpVisitor();\n    const parts = message.nodes.map(a => a.visit(visitor, null));\n    return computeMsgId(parts.join(''), message.meaning);\n}\n/**\n * Serialize the i18n ast to something xml-like in order to generate an UID.\n *\n * The visitor is also used in the i18n parser tests\n *\n * @internal\n */\nclass _SerializerVisitor {\n    visitText(text, context) {\n        return text.value;\n    }\n    visitContainer(container, context) {\n        return `[${container.children.map(child => child.visit(this)).join(', ')}]`;\n    }\n    visitIcu(icu, context) {\n        const strCases = Object.keys(icu.cases).map((k) => `${k} {${icu.cases[k].visit(this)}}`);\n        return `{${icu.expression}, ${icu.type}, ${strCases.join(', ')}}`;\n    }\n    visitTagPlaceholder(ph, context) {\n        return ph.isVoid ?\n            `<ph tag name=\"${ph.startName}\"/>` :\n            `<ph tag name=\"${ph.startName}\">${ph.children.map(child => child.visit(this)).join(', ')}</ph name=\"${ph.closeName}\">`;\n    }\n    visitPlaceholder(ph, context) {\n        return ph.value ? `<ph name=\"${ph.name}\">${ph.value}</ph>` : `<ph name=\"${ph.name}\"/>`;\n    }\n    visitIcuPlaceholder(ph, context) {\n        return `<ph icu name=\"${ph.name}\">${ph.value.visit(this)}</ph>`;\n    }\n}\nconst serializerVisitor = new _SerializerVisitor();\nfunction serializeNodes(nodes) {\n    return nodes.map(a => a.visit(serializerVisitor, null));\n}\n/**\n * Serialize the i18n ast to something xml-like in order to generate an UID.\n *\n * Ignore the ICU expressions so that message IDs stays identical if only the expression changes.\n *\n * @internal\n */\nclass _SerializerIgnoreIcuExpVisitor extends _SerializerVisitor {\n    visitIcu(icu, context) {\n        let strCases = Object.keys(icu.cases).map((k) => `${k} {${icu.cases[k].visit(this)}}`);\n        // Do not take the expression into account\n        return `{${icu.type}, ${strCases.join(', ')}}`;\n    }\n}\n/**\n * Compute the SHA1 of the given string\n *\n * see http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf\n *\n * WARNING: this function has not been designed not tested with security in mind.\n *          DO NOT USE IT IN A SECURITY SENSITIVE CONTEXT.\n */\nfunction sha1(str) {\n    const utf8 = utf8Encode(str);\n    const words32 = stringToWords32(utf8, Endian.Big);\n    const len = utf8.length * 8;\n    const w = newArray(80);\n    let a = 0x67452301, b = 0xefcdab89, c = 0x98badcfe, d = 0x10325476, e = 0xc3d2e1f0;\n    words32[len >> 5] |= 0x80 << (24 - len % 32);\n    words32[((len + 64 >> 9) << 4) + 15] = len;\n    for (let i = 0; i < words32.length; i += 16) {\n        const h0 = a, h1 = b, h2 = c, h3 = d, h4 = e;\n        for (let j = 0; j < 80; j++) {\n            if (j < 16) {\n                w[j] = words32[i + j];\n            }\n            else {\n                w[j] = rol32(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1);\n            }\n            const fkVal = fk(j, b, c, d);\n            const f = fkVal[0];\n            const k = fkVal[1];\n            const temp = [rol32(a, 5), f, e, k, w[j]].reduce(add32);\n            e = d;\n            d = c;\n            c = rol32(b, 30);\n            b = a;\n            a = temp;\n        }\n        a = add32(a, h0);\n        b = add32(b, h1);\n        c = add32(c, h2);\n        d = add32(d, h3);\n        e = add32(e, h4);\n    }\n    return byteStringToHexString(words32ToByteString([a, b, c, d, e]));\n}\nfunction fk(index, b, c, d) {\n    if (index < 20) {\n        return [(b & c) | (~b & d), 0x5a827999];\n    }\n    if (index < 40) {\n        return [b ^ c ^ d, 0x6ed9eba1];\n    }\n    if (index < 60) {\n        return [(b & c) | (b & d) | (c & d), 0x8f1bbcdc];\n    }\n    return [b ^ c ^ d, 0xca62c1d6];\n}\n/**\n * Compute the fingerprint of the given string\n *\n * The output is 64 bit number encoded as a decimal string\n *\n * based on:\n * https://github.com/google/closure-compiler/blob/master/src/com/google/javascript/jscomp/GoogleJsMessageIdGenerator.java\n */\nfunction fingerprint(str) {\n    const utf8 = utf8Encode(str);\n    let hi = hash32(utf8, 0);\n    let lo = hash32(utf8, 102072);\n    if (hi == 0 && (lo == 0 || lo == 1)) {\n        hi = hi ^ 0x130f9bef;\n        lo = lo ^ -0x6b5f56d8;\n    }\n    return [hi, lo];\n}\nfunction computeMsgId(msg, meaning = '') {\n    let msgFingerprint = fingerprint(msg);\n    if (meaning) {\n        const meaningFingerprint = fingerprint(meaning);\n        msgFingerprint = add64(rol64(msgFingerprint, 1), meaningFingerprint);\n    }\n    const hi = msgFingerprint[0];\n    const lo = msgFingerprint[1];\n    return byteStringToDecString(words32ToByteString([hi & 0x7fffffff, lo]));\n}\nfunction hash32(str, c) {\n    let a = 0x9e3779b9, b = 0x9e3779b9;\n    let i;\n    const len = str.length;\n    for (i = 0; i + 12 <= len; i += 12) {\n        a = add32(a, wordAt(str, i, Endian.Little));\n        b = add32(b, wordAt(str, i + 4, Endian.Little));\n        c = add32(c, wordAt(str, i + 8, Endian.Little));\n        const res = mix(a, b, c);\n        a = res[0], b = res[1], c = res[2];\n    }\n    a = add32(a, wordAt(str, i, Endian.Little));\n    b = add32(b, wordAt(str, i + 4, Endian.Little));\n    // the first byte of c is reserved for the length\n    c = add32(c, len);\n    c = add32(c, wordAt(str, i + 8, Endian.Little) << 8);\n    return mix(a, b, c)[2];\n}\n// clang-format off\nfunction mix(a, b, c) {\n    a = sub32(a, b);\n    a = sub32(a, c);\n    a ^= c >>> 13;\n    b = sub32(b, c);\n    b = sub32(b, a);\n    b ^= a << 8;\n    c = sub32(c, a);\n    c = sub32(c, b);\n    c ^= b >>> 13;\n    a = sub32(a, b);\n    a = sub32(a, c);\n    a ^= c >>> 12;\n    b = sub32(b, c);\n    b = sub32(b, a);\n    b ^= a << 16;\n    c = sub32(c, a);\n    c = sub32(c, b);\n    c ^= b >>> 5;\n    a = sub32(a, b);\n    a = sub32(a, c);\n    a ^= c >>> 3;\n    b = sub32(b, c);\n    b = sub32(b, a);\n    b ^= a << 10;\n    c = sub32(c, a);\n    c = sub32(c, b);\n    c ^= b >>> 15;\n    return [a, b, c];\n}\n// clang-format on\n// Utils\nvar Endian;\n(function (Endian) {\n    Endian[Endian[\"Little\"] = 0] = \"Little\";\n    Endian[Endian[\"Big\"] = 1] = \"Big\";\n})(Endian || (Endian = {}));\nfunction add32(a, b) {\n    return add32to64(a, b)[1];\n}\nfunction add32to64(a, b) {\n    const low = (a & 0xffff) + (b & 0xffff);\n    const high = (a >>> 16) + (b >>> 16) + (low >>> 16);\n    return [high >>> 16, (high << 16) | (low & 0xffff)];\n}\nfunction add64(a, b) {\n    const ah = a[0], al = a[1];\n    const bh = b[0], bl = b[1];\n    const result = add32to64(al, bl);\n    const carry = result[0];\n    const l = result[1];\n    const h = add32(add32(ah, bh), carry);\n    return [h, l];\n}\nfunction sub32(a, b) {\n    const low = (a & 0xffff) - (b & 0xffff);\n    const high = (a >> 16) - (b >> 16) + (low >> 16);\n    return (high << 16) | (low & 0xffff);\n}\n// Rotate a 32b number left `count` position\nfunction rol32(a, count) {\n    return (a << count) | (a >>> (32 - count));\n}\n// Rotate a 64b number left `count` position\nfunction rol64(num, count) {\n    const hi = num[0], lo = num[1];\n    const h = (hi << count) | (lo >>> (32 - count));\n    const l = (lo << count) | (hi >>> (32 - count));\n    return [h, l];\n}\nfunction stringToWords32(str, endian) {\n    const size = (str.length + 3) >>> 2;\n    const words32 = [];\n    for (let i = 0; i < size; i++) {\n        words32[i] = wordAt(str, i * 4, endian);\n    }\n    return words32;\n}\nfunction byteAt(str, index) {\n    return index >= str.length ? 0 : str.charCodeAt(index) & 0xff;\n}\nfunction wordAt(str, index, endian) {\n    let word = 0;\n    if (endian === Endian.Big) {\n        for (let i = 0; i < 4; i++) {\n            word += byteAt(str, index + i) << (24 - 8 * i);\n        }\n    }\n    else {\n        for (let i = 0; i < 4; i++) {\n            word += byteAt(str, index + i) << 8 * i;\n        }\n    }\n    return word;\n}\nfunction words32ToByteString(words32) {\n    return words32.reduce((str, word) => str + word32ToByteString(word), '');\n}\nfunction word32ToByteString(word) {\n    let str = '';\n    for (let i = 0; i < 4; i++) {\n        str += String.fromCharCode((word >>> 8 * (3 - i)) & 0xff);\n    }\n    return str;\n}\nfunction byteStringToHexString(str) {\n    let hex = '';\n    for (let i = 0; i < str.length; i++) {\n        const b = byteAt(str, i);\n        hex += (b >>> 4).toString(16) + (b & 0x0f).toString(16);\n    }\n    return hex.toLowerCase();\n}\n// based on http://www.danvk.org/hex2dec.html (JS can not handle more than 56b)\nfunction byteStringToDecString(str) {\n    let decimal = '';\n    let toThePower = '1';\n    for (let i = str.length - 1; i >= 0; i--) {\n        decimal = addBigInt(decimal, numberTimesBigInt(byteAt(str, i), toThePower));\n        toThePower = numberTimesBigInt(256, toThePower);\n    }\n    return decimal.split('').reverse().join('');\n}\n// x and y decimal, lowest significant digit first\nfunction addBigInt(x, y) {\n    let sum = '';\n    const len = Math.max(x.length, y.length);\n    for (let i = 0, carry = 0; i < len || carry; i++) {\n        const tmpSum = carry + +(x[i] || 0) + +(y[i] || 0);\n        if (tmpSum >= 10) {\n            carry = 1;\n            sum += tmpSum - 10;\n        }\n        else {\n            carry = 0;\n            sum += tmpSum;\n        }\n    }\n    return sum;\n}\nfunction numberTimesBigInt(num, b) {\n    let product = '';\n    let bToThePower = b;\n    for (; num !== 0; num = num >>> 1) {\n        if (num & 1)\n            product = addBigInt(product, bToThePower);\n        bToThePower = addBigInt(bToThePower, bToThePower);\n    }\n    return product;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass Serializer {\n    // Creates a name mapper, see `PlaceholderMapper`\n    // Returning `null` means that no name mapping is used.\n    createNameMapper(message) {\n        return null;\n    }\n}\n/**\n * A simple mapper that take a function to transform an internal name to a public name\n */\nclass SimplePlaceholderMapper extends RecurseVisitor {\n    // create a mapping from the message\n    constructor(message, mapName) {\n        super();\n        this.mapName = mapName;\n        this.internalToPublic = {};\n        this.publicToNextId = {};\n        this.publicToInternal = {};\n        message.nodes.forEach(node => node.visit(this));\n    }\n    toPublicName(internalName) {\n        return this.internalToPublic.hasOwnProperty(internalName) ?\n            this.internalToPublic[internalName] :\n            null;\n    }\n    toInternalName(publicName) {\n        return this.publicToInternal.hasOwnProperty(publicName) ? this.publicToInternal[publicName] :\n            null;\n    }\n    visitText(text, context) {\n        return null;\n    }\n    visitTagPlaceholder(ph, context) {\n        this.visitPlaceholderName(ph.startName);\n        super.visitTagPlaceholder(ph, context);\n        this.visitPlaceholderName(ph.closeName);\n    }\n    visitPlaceholder(ph, context) {\n        this.visitPlaceholderName(ph.name);\n    }\n    visitIcuPlaceholder(ph, context) {\n        this.visitPlaceholderName(ph.name);\n    }\n    // XMB placeholders could only contains A-Z, 0-9 and _\n    visitPlaceholderName(internalName) {\n        if (!internalName || this.internalToPublic.hasOwnProperty(internalName)) {\n            return;\n        }\n        let publicName = this.mapName(internalName);\n        if (this.publicToInternal.hasOwnProperty(publicName)) {\n            // Create a new XMB when it has already been used\n            const nextId = this.publicToNextId[publicName];\n            this.publicToNextId[publicName] = nextId + 1;\n            publicName = `${publicName}_${nextId}`;\n        }\n        else {\n            this.publicToNextId[publicName] = 1;\n        }\n        this.internalToPublic[internalName] = publicName;\n        this.publicToInternal[publicName] = internalName;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass _Visitor {\n    visitTag(tag) {\n        const strAttrs = this._serializeAttributes(tag.attrs);\n        if (tag.children.length == 0) {\n            return `<${tag.name}${strAttrs}/>`;\n        }\n        const strChildren = tag.children.map(node => node.visit(this));\n        return `<${tag.name}${strAttrs}>${strChildren.join('')}</${tag.name}>`;\n    }\n    visitText(text) {\n        return text.value;\n    }\n    visitDeclaration(decl) {\n        return `<?xml${this._serializeAttributes(decl.attrs)} ?>`;\n    }\n    _serializeAttributes(attrs) {\n        const strAttrs = Object.keys(attrs).map((name) => `${name}=\"${attrs[name]}\"`).join(' ');\n        return strAttrs.length > 0 ? ' ' + strAttrs : '';\n    }\n    visitDoctype(doctype) {\n        return `<!DOCTYPE ${doctype.rootTag} [\\n${doctype.dtd}\\n]>`;\n    }\n}\nconst _visitor = new _Visitor();\nfunction serialize(nodes) {\n    return nodes.map((node) => node.visit(_visitor)).join('');\n}\nclass Declaration {\n    constructor(unescapedAttrs) {\n        this.attrs = {};\n        Object.keys(unescapedAttrs).forEach((k) => {\n            this.attrs[k] = escapeXml(unescapedAttrs[k]);\n        });\n    }\n    visit(visitor) {\n        return visitor.visitDeclaration(this);\n    }\n}\nclass Doctype {\n    constructor(rootTag, dtd) {\n        this.rootTag = rootTag;\n        this.dtd = dtd;\n    }\n    visit(visitor) {\n        return visitor.visitDoctype(this);\n    }\n}\nclass Tag {\n    constructor(name, unescapedAttrs = {}, children = []) {\n        this.name = name;\n        this.children = children;\n        this.attrs = {};\n        Object.keys(unescapedAttrs).forEach((k) => {\n            this.attrs[k] = escapeXml(unescapedAttrs[k]);\n        });\n    }\n    visit(visitor) {\n        return visitor.visitTag(this);\n    }\n}\nclass Text$2 {\n    constructor(unescapedValue) {\n        this.value = escapeXml(unescapedValue);\n    }\n    visit(visitor) {\n        return visitor.visitText(this);\n    }\n}\nclass CR extends Text$2 {\n    constructor(ws = 0) {\n        super(`\\n${new Array(ws + 1).join(' ')}`);\n    }\n}\nconst _ESCAPED_CHARS = [\n    [/&/g, '&amp;'],\n    [/\"/g, '&quot;'],\n    [/'/g, '&apos;'],\n    [/</g, '&lt;'],\n    [/>/g, '&gt;'],\n];\n// Escape `_ESCAPED_CHARS` characters in the given text with encoded entities\nfunction escapeXml(text) {\n    return _ESCAPED_CHARS.reduce((text, entry) => text.replace(entry[0], entry[1]), text);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst _MESSAGES_TAG = 'messagebundle';\nconst _MESSAGE_TAG = 'msg';\nconst _PLACEHOLDER_TAG = 'ph';\nconst _EXAMPLE_TAG = 'ex';\nconst _SOURCE_TAG = 'source';\nconst _DOCTYPE = `<!ELEMENT messagebundle (msg)*>\n<!ATTLIST messagebundle class CDATA #IMPLIED>\n\n<!ELEMENT msg (#PCDATA|ph|source)*>\n<!ATTLIST msg id CDATA #IMPLIED>\n<!ATTLIST msg seq CDATA #IMPLIED>\n<!ATTLIST msg name CDATA #IMPLIED>\n<!ATTLIST msg desc CDATA #IMPLIED>\n<!ATTLIST msg meaning CDATA #IMPLIED>\n<!ATTLIST msg obsolete (obsolete) #IMPLIED>\n<!ATTLIST msg xml:space (default|preserve) \"default\">\n<!ATTLIST msg is_hidden CDATA #IMPLIED>\n\n<!ELEMENT source (#PCDATA)>\n\n<!ELEMENT ph (#PCDATA|ex)*>\n<!ATTLIST ph name CDATA #REQUIRED>\n\n<!ELEMENT ex (#PCDATA)>`;\nclass Xmb extends Serializer {\n    write(messages, locale) {\n        const exampleVisitor = new ExampleVisitor();\n        const visitor = new _Visitor$1();\n        let rootNode = new Tag(_MESSAGES_TAG);\n        messages.forEach(message => {\n            const attrs = { id: message.id };\n            if (message.description) {\n                attrs['desc'] = message.description;\n            }\n            if (message.meaning) {\n                attrs['meaning'] = message.meaning;\n            }\n            let sourceTags = [];\n            message.sources.forEach((source) => {\n                sourceTags.push(new Tag(_SOURCE_TAG, {}, [new Text$2(`${source.filePath}:${source.startLine}${source.endLine !== source.startLine ? ',' + source.endLine : ''}`)]));\n            });\n            rootNode.children.push(new CR(2), new Tag(_MESSAGE_TAG, attrs, [...sourceTags, ...visitor.serialize(message.nodes)]));\n        });\n        rootNode.children.push(new CR());\n        return serialize([\n            new Declaration({ version: '1.0', encoding: 'UTF-8' }),\n            new CR(),\n            new Doctype(_MESSAGES_TAG, _DOCTYPE),\n            new CR(),\n            exampleVisitor.addDefaultExamples(rootNode),\n            new CR(),\n        ]);\n    }\n    load(content, url) {\n        throw new Error('Unsupported');\n    }\n    digest(message) {\n        return digest$1(message);\n    }\n    createNameMapper(message) {\n        return new SimplePlaceholderMapper(message, toPublicName);\n    }\n}\nclass _Visitor$1 {\n    visitText(text, context) {\n        return [new Text$2(text.value)];\n    }\n    visitContainer(container, context) {\n        const nodes = [];\n        container.children.forEach((node) => nodes.push(...node.visit(this)));\n        return nodes;\n    }\n    visitIcu(icu, context) {\n        const nodes = [new Text$2(`{${icu.expressionPlaceholder}, ${icu.type}, `)];\n        Object.keys(icu.cases).forEach((c) => {\n            nodes.push(new Text$2(`${c} {`), ...icu.cases[c].visit(this), new Text$2(`} `));\n        });\n        nodes.push(new Text$2(`}`));\n        return nodes;\n    }\n    visitTagPlaceholder(ph, context) {\n        const startTagAsText = new Text$2(`<${ph.tag}>`);\n        const startEx = new Tag(_EXAMPLE_TAG, {}, [startTagAsText]);\n        // TC requires PH to have a non empty EX, and uses the text node to show the \"original\" value.\n        const startTagPh = new Tag(_PLACEHOLDER_TAG, { name: ph.startName }, [startEx, startTagAsText]);\n        if (ph.isVoid) {\n            // void tags have no children nor closing tags\n            return [startTagPh];\n        }\n        const closeTagAsText = new Text$2(`</${ph.tag}>`);\n        const closeEx = new Tag(_EXAMPLE_TAG, {}, [closeTagAsText]);\n        // TC requires PH to have a non empty EX, and uses the text node to show the \"original\" value.\n        const closeTagPh = new Tag(_PLACEHOLDER_TAG, { name: ph.closeName }, [closeEx, closeTagAsText]);\n        return [startTagPh, ...this.serialize(ph.children), closeTagPh];\n    }\n    visitPlaceholder(ph, context) {\n        const interpolationAsText = new Text$2(`{{${ph.value}}}`);\n        // Example tag needs to be not-empty for TC.\n        const exTag = new Tag(_EXAMPLE_TAG, {}, [interpolationAsText]);\n        return [\n            // TC requires PH to have a non empty EX, and uses the text node to show the \"original\" value.\n            new Tag(_PLACEHOLDER_TAG, { name: ph.name }, [exTag, interpolationAsText])\n        ];\n    }\n    visitIcuPlaceholder(ph, context) {\n        const icuExpression = ph.value.expression;\n        const icuType = ph.value.type;\n        const icuCases = Object.keys(ph.value.cases).map((value) => value + ' {...}').join(' ');\n        const icuAsText = new Text$2(`{${icuExpression}, ${icuType}, ${icuCases}}`);\n        const exTag = new Tag(_EXAMPLE_TAG, {}, [icuAsText]);\n        return [\n            // TC requires PH to have a non empty EX, and uses the text node to show the \"original\" value.\n            new Tag(_PLACEHOLDER_TAG, { name: ph.name }, [exTag, icuAsText])\n        ];\n    }\n    serialize(nodes) {\n        return [].concat(...nodes.map(node => node.visit(this)));\n    }\n}\nfunction digest$1(message) {\n    return decimalDigest(message);\n}\n// TC requires at least one non-empty example on placeholders\nclass ExampleVisitor {\n    addDefaultExamples(node) {\n        node.visit(this);\n        return node;\n    }\n    visitTag(tag) {\n        if (tag.name === _PLACEHOLDER_TAG) {\n            if (!tag.children || tag.children.length == 0) {\n                const exText = new Text$2(tag.attrs['name'] || '...');\n                tag.children = [new Tag(_EXAMPLE_TAG, {}, [exText])];\n            }\n        }\n        else if (tag.children) {\n            tag.children.forEach(node => node.visit(this));\n        }\n    }\n    visitText(text) { }\n    visitDeclaration(decl) { }\n    visitDoctype(doctype) { }\n}\n// XMB/XTB placeholders can only contain A-Z, 0-9 and _\nfunction toPublicName(internalName) {\n    return internalName.toUpperCase().replace(/[^A-Z0-9_]/g, '_');\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/* Closure variables holding messages must be named `MSG_[A-Z0-9]+` */\nconst CLOSURE_TRANSLATION_VAR_PREFIX = 'MSG_';\n/**\n * Prefix for non-`goog.getMsg` i18n-related vars.\n * Note: the prefix uses lowercase characters intentionally due to a Closure behavior that\n * considers variables like `I18N_0` as constants and throws an error when their value changes.\n */\nconst TRANSLATION_VAR_PREFIX = 'i18n_';\n/** Name of the i18n attributes **/\nconst I18N_ATTR = 'i18n';\nconst I18N_ATTR_PREFIX = 'i18n-';\n/** Prefix of var expressions used in ICUs */\nconst I18N_ICU_VAR_PREFIX = 'VAR_';\n/** Prefix of ICU expressions for post processing */\nconst I18N_ICU_MAPPING_PREFIX = 'I18N_EXP_';\n/** Placeholder wrapper for i18n expressions **/\nconst I18N_PLACEHOLDER_SYMBOL = '�';\nfunction isI18nAttribute(name) {\n    return name === I18N_ATTR || name.startsWith(I18N_ATTR_PREFIX);\n}\nfunction isI18nRootNode(meta) {\n    return meta instanceof Message;\n}\nfunction isSingleI18nIcu(meta) {\n    return isI18nRootNode(meta) && meta.nodes.length === 1 && meta.nodes[0] instanceof Icu$1;\n}\nfunction hasI18nMeta(node) {\n    return !!node.i18n;\n}\nfunction hasI18nAttrs(element) {\n    return element.attrs.some((attr) => isI18nAttribute(attr.name));\n}\nfunction icuFromI18nMessage(message) {\n    return message.nodes[0];\n}\nfunction wrapI18nPlaceholder(content, contextId = 0) {\n    const blockId = contextId > 0 ? `:${contextId}` : '';\n    return `${I18N_PLACEHOLDER_SYMBOL}${content}${blockId}${I18N_PLACEHOLDER_SYMBOL}`;\n}\nfunction assembleI18nBoundString(strings, bindingStartIndex = 0, contextId = 0) {\n    if (!strings.length)\n        return '';\n    let acc = '';\n    const lastIdx = strings.length - 1;\n    for (let i = 0; i < lastIdx; i++) {\n        acc += `${strings[i]}${wrapI18nPlaceholder(bindingStartIndex + i, contextId)}`;\n    }\n    acc += strings[lastIdx];\n    return acc;\n}\nfunction getSeqNumberGenerator(startsAt = 0) {\n    let current = startsAt;\n    return () => current++;\n}\nfunction placeholdersToParams(placeholders) {\n    const params = {};\n    placeholders.forEach((values, key) => {\n        params[key] = literal(values.length > 1 ? `[${values.join('|')}]` : values[0]);\n    });\n    return params;\n}\nfunction updatePlaceholderMap(map, name, ...values) {\n    const current = map.get(name) || [];\n    current.push(...values);\n    map.set(name, current);\n}\nfunction assembleBoundTextPlaceholders(meta, bindingStartIndex = 0, contextId = 0) {\n    const startIdx = bindingStartIndex;\n    const placeholders = new Map();\n    const node = meta instanceof Message ? meta.nodes.find(node => node instanceof Container) : meta;\n    if (node) {\n        node\n            .children\n            .filter((child) => child instanceof Placeholder)\n            .forEach((child, idx) => {\n            const content = wrapI18nPlaceholder(startIdx + idx, contextId);\n            updatePlaceholderMap(placeholders, child.name, content);\n        });\n    }\n    return placeholders;\n}\n/**\n * Format the placeholder names in a map of placeholders to expressions.\n *\n * The placeholder names are converted from \"internal\" format (e.g. `START_TAG_DIV_1`) to \"external\"\n * format (e.g. `startTagDiv_1`).\n *\n * @param params A map of placeholder names to expressions.\n * @param useCamelCase whether to camelCase the placeholder name when formatting.\n * @returns A new map of formatted placeholder names to expressions.\n */\nfunction i18nFormatPlaceholderNames(params = {}, useCamelCase) {\n    const _params = {};\n    if (params && Object.keys(params).length) {\n        Object.keys(params).forEach(key => _params[formatI18nPlaceholderName(key, useCamelCase)] = params[key]);\n    }\n    return _params;\n}\n/**\n * Converts internal placeholder names to public-facing format\n * (for example to use in goog.getMsg call).\n * Example: `START_TAG_DIV_1` is converted to `startTagDiv_1`.\n *\n * @param name The placeholder name that should be formatted\n * @returns Formatted placeholder name\n */\nfunction formatI18nPlaceholderName(name, useCamelCase = true) {\n    const publicName = toPublicName(name);\n    if (!useCamelCase) {\n        return publicName;\n    }\n    const chunks = publicName.split('_');\n    if (chunks.length === 1) {\n        // if no \"_\" found - just lowercase the value\n        return name.toLowerCase();\n    }\n    let postfix;\n    // eject last element if it's a number\n    if (/^\\d+$/.test(chunks[chunks.length - 1])) {\n        postfix = chunks.pop();\n    }\n    let raw = chunks.shift().toLowerCase();\n    if (chunks.length) {\n        raw += chunks.map(c => c.charAt(0).toUpperCase() + c.slice(1).toLowerCase()).join('');\n    }\n    return postfix ? `${raw}_${postfix}` : raw;\n}\n/**\n * Generates a prefix for translation const name.\n *\n * @param extra Additional local prefix that should be injected into translation var name\n * @returns Complete translation const prefix\n */\nfunction getTranslationConstPrefix(extra) {\n    return `${CLOSURE_TRANSLATION_VAR_PREFIX}${extra}`.toUpperCase();\n}\n/**\n * Generate AST to declare a variable. E.g. `var I18N_1;`.\n * @param variable the name of the variable to declare.\n */\nfunction declareI18nVariable(variable) {\n    return new DeclareVarStmt(variable.name, undefined, INFERRED_TYPE, undefined, variable.sourceSpan);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Checks whether an object key contains potentially unsafe chars, thus the key should be wrapped in\n * quotes. Note: we do not wrap all keys into quotes, as it may have impact on minification and may\n * bot work in some cases when object keys are mangled by minifier.\n *\n * TODO(FW-1136): this is a temporary solution, we need to come up with a better way of working with\n * inputs that contain potentially unsafe chars.\n */\nconst UNSAFE_OBJECT_KEY_NAME_REGEXP = /[-.]/;\n/** Name of the temporary to use during data binding */\nconst TEMPORARY_NAME = '_t';\n/** Name of the context parameter passed into a template function */\nconst CONTEXT_NAME = 'ctx';\n/** Name of the RenderFlag passed into a template function */\nconst RENDER_FLAGS = 'rf';\n/** The prefix reference variables */\nconst REFERENCE_PREFIX = '_r';\n/** The name of the implicit context reference */\nconst IMPLICIT_REFERENCE = '$implicit';\n/** Non bindable attribute name **/\nconst NON_BINDABLE_ATTR = 'ngNonBindable';\n/**\n * Creates an allocator for a temporary variable.\n *\n * A variable declaration is added to the statements the first time the allocator is invoked.\n */\nfunction temporaryAllocator(statements, name) {\n    let temp = null;\n    return () => {\n        if (!temp) {\n            statements.push(new DeclareVarStmt(TEMPORARY_NAME, undefined, DYNAMIC_TYPE));\n            temp = variable(name);\n        }\n        return temp;\n    };\n}\nfunction unsupported(feature) {\n    if (this) {\n        throw new Error(`Builder ${this.constructor.name} doesn't support ${feature} yet`);\n    }\n    throw new Error(`Feature ${feature} is not supported yet`);\n}\nfunction invalid$1(arg) {\n    throw new Error(`Invalid state: Visitor ${this.constructor.name} doesn't handle ${arg.constructor.name}`);\n}\nfunction asLiteral(value) {\n    if (Array.isArray(value)) {\n        return literalArr(value.map(asLiteral));\n    }\n    return literal(value, INFERRED_TYPE);\n}\nfunction conditionallyCreateMapObjectLiteral(keys, keepDeclared) {\n    if (Object.getOwnPropertyNames(keys).length > 0) {\n        return mapToExpression(keys, keepDeclared);\n    }\n    return null;\n}\nfunction mapToExpression(map, keepDeclared) {\n    return literalMap(Object.getOwnPropertyNames(map).map(key => {\n        // canonical syntax: `dirProp: publicProp`\n        // if there is no `:`, use dirProp = elProp\n        const value = map[key];\n        let declaredName;\n        let publicName;\n        let minifiedName;\n        if (Array.isArray(value)) {\n            [publicName, declaredName] = value;\n        }\n        else {\n            [declaredName, publicName] = splitAtColon(key, [key, value]);\n        }\n        minifiedName = declaredName;\n        return {\n            key: minifiedName,\n            // put quotes around keys that contain potentially unsafe characters\n            quoted: UNSAFE_OBJECT_KEY_NAME_REGEXP.test(minifiedName),\n            value: (keepDeclared && publicName !== declaredName) ?\n                literalArr([asLiteral(publicName), asLiteral(declaredName)]) :\n                asLiteral(publicName)\n        };\n    }));\n}\n/**\n *  Remove trailing null nodes as they are implied.\n */\nfunction trimTrailingNulls(parameters) {\n    while (isNull(parameters[parameters.length - 1])) {\n        parameters.pop();\n    }\n    return parameters;\n}\nfunction getQueryPredicate(query, constantPool) {\n    if (Array.isArray(query.predicate)) {\n        let predicate = [];\n        query.predicate.forEach((selector) => {\n            // Each item in predicates array may contain strings with comma-separated refs\n            // (for ex. 'ref, ref1, ..., refN'), thus we extract individual refs and store them\n            // as separate array entities\n            const selectors = selector.split(',').map(token => literal(token.trim()));\n            predicate.push(...selectors);\n        });\n        return constantPool.getConstLiteral(literalArr(predicate), true);\n    }\n    else {\n        return query.predicate;\n    }\n}\nfunction noop() { }\nclass DefinitionMap {\n    constructor() {\n        this.values = [];\n    }\n    set(key, value) {\n        if (value) {\n            this.values.push({ key, value, quoted: false });\n        }\n    }\n    toLiteralMap() {\n        return literalMap(this.values);\n    }\n}\n/**\n * Extract a map of properties to values for a given element or template node, which can be used\n * by the directive matching machinery.\n *\n * @param elOrTpl the element or template in question\n * @return an object set up for directive matching. For attributes on the element/template, this\n * object maps a property name to its (static) value. For any bindings, this map simply maps the\n * property name to an empty string.\n */\nfunction getAttrsForDirectiveMatching(elOrTpl) {\n    const attributesMap = {};\n    if (elOrTpl instanceof Template && elOrTpl.tagName !== 'ng-template') {\n        elOrTpl.templateAttrs.forEach(a => attributesMap[a.name] = '');\n    }\n    else {\n        elOrTpl.attributes.forEach(a => {\n            if (!isI18nAttribute(a.name)) {\n                attributesMap[a.name] = a.value;\n            }\n        });\n        elOrTpl.inputs.forEach(i => {\n            attributesMap[i.name] = '';\n        });\n        elOrTpl.outputs.forEach(o => {\n            attributesMap[o.name] = '';\n        });\n    }\n    return attributesMap;\n}\n/** Returns a call expression to a chained instruction, e.g. `property(params[0])(params[1])`. */\nfunction chainedInstruction(reference, calls, span) {\n    let expression = importExpr(reference, null, span);\n    if (calls.length > 0) {\n        for (let i = 0; i < calls.length; i++) {\n            expression = expression.callFn(calls[i], span);\n        }\n    }\n    else {\n        // Add a blank invocation, in case the `calls` array is empty.\n        expression = expression.callFn([], span);\n    }\n    return expression;\n}\n/**\n * Gets the number of arguments expected to be passed to a generated instruction in the case of\n * interpolation instructions.\n * @param interpolation An interpolation ast\n */\nfunction getInterpolationArgsLength(interpolation) {\n    const { expressions, strings } = interpolation;\n    if (expressions.length === 1 && strings.length === 2 && strings[0] === '' && strings[1] === '') {\n        // If the interpolation has one interpolated value, but the prefix and suffix are both empty\n        // strings, we only pass one argument, to a special instruction like `propertyInterpolate` or\n        // `textInterpolate`.\n        return 1;\n    }\n    else {\n        return expressions.length + strings.length;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nvar R3FactoryDelegateType;\n(function (R3FactoryDelegateType) {\n    R3FactoryDelegateType[R3FactoryDelegateType[\"Class\"] = 0] = \"Class\";\n    R3FactoryDelegateType[R3FactoryDelegateType[\"Function\"] = 1] = \"Function\";\n    R3FactoryDelegateType[R3FactoryDelegateType[\"Factory\"] = 2] = \"Factory\";\n})(R3FactoryDelegateType || (R3FactoryDelegateType = {}));\nvar R3FactoryTarget;\n(function (R3FactoryTarget) {\n    R3FactoryTarget[R3FactoryTarget[\"Directive\"] = 0] = \"Directive\";\n    R3FactoryTarget[R3FactoryTarget[\"Component\"] = 1] = \"Component\";\n    R3FactoryTarget[R3FactoryTarget[\"Injectable\"] = 2] = \"Injectable\";\n    R3FactoryTarget[R3FactoryTarget[\"Pipe\"] = 3] = \"Pipe\";\n    R3FactoryTarget[R3FactoryTarget[\"NgModule\"] = 4] = \"NgModule\";\n})(R3FactoryTarget || (R3FactoryTarget = {}));\n/**\n * Resolved type of a dependency.\n *\n * Occasionally, dependencies will have special significance which is known statically. In that\n * case the `R3ResolvedDependencyType` informs the factory generator that a particular dependency\n * should be generated specially (usually by calling a special injection function instead of the\n * standard one).\n */\nvar R3ResolvedDependencyType;\n(function (R3ResolvedDependencyType) {\n    /**\n     * A normal token dependency.\n     */\n    R3ResolvedDependencyType[R3ResolvedDependencyType[\"Token\"] = 0] = \"Token\";\n    /**\n     * The dependency is for an attribute.\n     *\n     * The token expression is a string representing the attribute name.\n     */\n    R3ResolvedDependencyType[R3ResolvedDependencyType[\"Attribute\"] = 1] = \"Attribute\";\n    /**\n     * Injecting the `ChangeDetectorRef` token. Needs special handling when injected into a pipe.\n     */\n    R3ResolvedDependencyType[R3ResolvedDependencyType[\"ChangeDetectorRef\"] = 2] = \"ChangeDetectorRef\";\n    /**\n     * An invalid dependency (no token could be determined). An error should be thrown at runtime.\n     */\n    R3ResolvedDependencyType[R3ResolvedDependencyType[\"Invalid\"] = 3] = \"Invalid\";\n})(R3ResolvedDependencyType || (R3ResolvedDependencyType = {}));\n/**\n * Construct a factory function expression for the given `R3FactoryMetadata`.\n */\nfunction compileFactoryFunction(meta) {\n    const t = variable('t');\n    const statements = [];\n    let ctorDepsType = NONE_TYPE;\n    // The type to instantiate via constructor invocation. If there is no delegated factory, meaning\n    // this type is always created by constructor invocation, then this is the type-to-create\n    // parameter provided by the user (t) if specified, or the current type if not. If there is a\n    // delegated factory (which is used to create the current type) then this is only the type-to-\n    // create parameter (t).\n    const typeForCtor = !isDelegatedMetadata(meta) ?\n        new BinaryOperatorExpr(BinaryOperator.Or, t, meta.internalType) :\n        t;\n    let ctorExpr = null;\n    if (meta.deps !== null) {\n        // There is a constructor (either explicitly or implicitly defined).\n        if (meta.deps !== 'invalid') {\n            ctorExpr = new InstantiateExpr(typeForCtor, injectDependencies(meta.deps, meta.injectFn, meta.target === R3FactoryTarget.Pipe));\n            ctorDepsType = createCtorDepsType(meta.deps);\n        }\n    }\n    else {\n        const baseFactory = variable(`ɵ${meta.name}_BaseFactory`);\n        const getInheritedFactory = importExpr(Identifiers$1.getInheritedFactory);\n        const baseFactoryStmt = baseFactory\n            .set(getInheritedFactory.callFn([meta.internalType], /* sourceSpan */ undefined, /* pure */ true))\n            .toDeclStmt(INFERRED_TYPE, [StmtModifier.Exported, StmtModifier.Final]);\n        statements.push(baseFactoryStmt);\n        // There is no constructor, use the base class' factory to construct typeForCtor.\n        ctorExpr = baseFactory.callFn([typeForCtor]);\n    }\n    const ctorExprFinal = ctorExpr;\n    const body = [];\n    let retExpr = null;\n    function makeConditionalFactory(nonCtorExpr) {\n        const r = variable('r');\n        body.push(r.set(NULL_EXPR).toDeclStmt());\n        let ctorStmt = null;\n        if (ctorExprFinal !== null) {\n            ctorStmt = r.set(ctorExprFinal).toStmt();\n        }\n        else {\n            ctorStmt = importExpr(Identifiers$1.invalidFactory).callFn([]).toStmt();\n        }\n        body.push(ifStmt(t, [ctorStmt], [r.set(nonCtorExpr).toStmt()]));\n        return r;\n    }\n    if (isDelegatedMetadata(meta) && meta.delegateType === R3FactoryDelegateType.Factory) {\n        const delegateFactory = variable(`ɵ${meta.name}_BaseFactory`);\n        const getFactoryOf = importExpr(Identifiers$1.getFactoryOf);\n        if (meta.delegate.isEquivalent(meta.internalType)) {\n            throw new Error(`Illegal state: compiling factory that delegates to itself`);\n        }\n        const delegateFactoryStmt = delegateFactory.set(getFactoryOf.callFn([meta.delegate])).toDeclStmt(INFERRED_TYPE, [\n            StmtModifier.Exported, StmtModifier.Final\n        ]);\n        statements.push(delegateFactoryStmt);\n        retExpr = makeConditionalFactory(delegateFactory.callFn([]));\n    }\n    else if (isDelegatedMetadata(meta)) {\n        // This type is created with a delegated factory. If a type parameter is not specified, call\n        // the factory instead.\n        const delegateArgs = injectDependencies(meta.delegateDeps, meta.injectFn, meta.target === R3FactoryTarget.Pipe);\n        // Either call `new delegate(...)` or `delegate(...)` depending on meta.delegateType.\n        const factoryExpr = new (meta.delegateType === R3FactoryDelegateType.Class ?\n            InstantiateExpr :\n            InvokeFunctionExpr)(meta.delegate, delegateArgs);\n        retExpr = makeConditionalFactory(factoryExpr);\n    }\n    else if (isExpressionFactoryMetadata(meta)) {\n        // TODO(alxhub): decide whether to lower the value here or in the caller\n        retExpr = makeConditionalFactory(meta.expression);\n    }\n    else {\n        retExpr = ctorExpr;\n    }\n    if (retExpr !== null) {\n        body.push(new ReturnStatement(retExpr));\n    }\n    else {\n        body.push(importExpr(Identifiers$1.invalidFactory).callFn([]).toStmt());\n    }\n    return {\n        factory: fn([new FnParam('t', DYNAMIC_TYPE)], body, INFERRED_TYPE, undefined, `${meta.name}_Factory`),\n        statements,\n        type: expressionType(importExpr(Identifiers$1.FactoryDef, [typeWithParameters(meta.type.type, meta.typeArgumentCount), ctorDepsType]))\n    };\n}\nfunction injectDependencies(deps, injectFn, isPipe) {\n    return deps.map((dep, index) => compileInjectDependency(dep, injectFn, isPipe, index));\n}\nfunction compileInjectDependency(dep, injectFn, isPipe, index) {\n    // Interpret the dependency according to its resolved type.\n    switch (dep.resolved) {\n        case R3ResolvedDependencyType.Token:\n        case R3ResolvedDependencyType.ChangeDetectorRef:\n            // Build up the injection flags according to the metadata.\n            const flags = 0 /* Default */ | (dep.self ? 2 /* Self */ : 0) |\n                (dep.skipSelf ? 4 /* SkipSelf */ : 0) | (dep.host ? 1 /* Host */ : 0) |\n                (dep.optional ? 8 /* Optional */ : 0);\n            // If this dependency is optional or otherwise has non-default flags, then additional\n            // parameters describing how to inject the dependency must be passed to the inject function\n            // that's being used.\n            let flagsParam = (flags !== 0 /* Default */ || dep.optional) ? literal(flags) : null;\n            // We have a separate instruction for injecting ChangeDetectorRef into a pipe.\n            if (isPipe && dep.resolved === R3ResolvedDependencyType.ChangeDetectorRef) {\n                return importExpr(Identifiers$1.injectPipeChangeDetectorRef).callFn(flagsParam ? [flagsParam] : []);\n            }\n            // Build up the arguments to the injectFn call.\n            const injectArgs = [dep.token];\n            if (flagsParam) {\n                injectArgs.push(flagsParam);\n            }\n            return importExpr(injectFn).callFn(injectArgs);\n        case R3ResolvedDependencyType.Attribute:\n            // In the case of attributes, the attribute name in question is given as the token.\n            return importExpr(Identifiers$1.injectAttribute).callFn([dep.token]);\n        case R3ResolvedDependencyType.Invalid:\n            return importExpr(Identifiers$1.invalidFactoryDep).callFn([literal(index)]);\n        default:\n            return unsupported(`Unknown R3ResolvedDependencyType: ${R3ResolvedDependencyType[dep.resolved]}`);\n    }\n}\nfunction createCtorDepsType(deps) {\n    let hasTypes = false;\n    const attributeTypes = deps.map(dep => {\n        const type = createCtorDepType(dep);\n        if (type !== null) {\n            hasTypes = true;\n            return type;\n        }\n        else {\n            return literal(null);\n        }\n    });\n    if (hasTypes) {\n        return expressionType(literalArr(attributeTypes));\n    }\n    else {\n        return NONE_TYPE;\n    }\n}\nfunction createCtorDepType(dep) {\n    const entries = [];\n    if (dep.resolved === R3ResolvedDependencyType.Attribute) {\n        if (dep.attribute !== null) {\n            entries.push({ key: 'attribute', value: dep.attribute, quoted: false });\n        }\n    }\n    if (dep.optional) {\n        entries.push({ key: 'optional', value: literal(true), quoted: false });\n    }\n    if (dep.host) {\n        entries.push({ key: 'host', value: literal(true), quoted: false });\n    }\n    if (dep.self) {\n        entries.push({ key: 'self', value: literal(true), quoted: false });\n    }\n    if (dep.skipSelf) {\n        entries.push({ key: 'skipSelf', value: literal(true), quoted: false });\n    }\n    return entries.length > 0 ? literalMap(entries) : null;\n}\n/**\n * A helper function useful for extracting `R3DependencyMetadata` from a Render2\n * `CompileTypeMetadata` instance.\n */\nfunction dependenciesFromGlobalMetadata(type, outputCtx, reflector) {\n    // Use the `CompileReflector` to look up references to some well-known Angular types. These will\n    // be compared with the token to statically determine whether the token has significance to\n    // Angular, and set the correct `R3ResolvedDependencyType` as a result.\n    const injectorRef = reflector.resolveExternalReference(Identifiers.Injector);\n    // Iterate through the type's DI dependencies and produce `R3DependencyMetadata` for each of them.\n    const deps = [];\n    for (let dependency of type.diDeps) {\n        if (dependency.token) {\n            const tokenRef = tokenReference(dependency.token);\n            let resolved = dependency.isAttribute ?\n                R3ResolvedDependencyType.Attribute :\n                R3ResolvedDependencyType.Token;\n            // In the case of most dependencies, the token will be a reference to a type. Sometimes,\n            // however, it can be a string, in the case of older Angular code or @Attribute injection.\n            const token = tokenRef instanceof StaticSymbol ? outputCtx.importExpr(tokenRef) : literal(tokenRef);\n            // Construct the dependency.\n            deps.push({\n                token,\n                attribute: null,\n                resolved,\n                host: !!dependency.isHost,\n                optional: !!dependency.isOptional,\n                self: !!dependency.isSelf,\n                skipSelf: !!dependency.isSkipSelf,\n            });\n        }\n        else {\n            unsupported('dependency without a token');\n        }\n    }\n    return deps;\n}\nfunction isDelegatedMetadata(meta) {\n    return meta.delegateType !== undefined;\n}\nfunction isExpressionFactoryMetadata(meta) {\n    return meta.expression !== undefined;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction compileInjectable(meta) {\n    let result = null;\n    const factoryMeta = {\n        name: meta.name,\n        type: meta.type,\n        internalType: meta.internalType,\n        typeArgumentCount: meta.typeArgumentCount,\n        deps: [],\n        injectFn: Identifiers.inject,\n        target: R3FactoryTarget.Injectable,\n    };\n    if (meta.useClass !== undefined) {\n        // meta.useClass has two modes of operation. Either deps are specified, in which case `new` is\n        // used to instantiate the class with dependencies injected, or deps are not specified and\n        // the factory of the class is used to instantiate it.\n        //\n        // A special case exists for useClass: Type where Type is the injectable type itself and no\n        // deps are specified, in which case 'useClass' is effectively ignored.\n        const useClassOnSelf = meta.useClass.isEquivalent(meta.internalType);\n        let deps = undefined;\n        if (meta.userDeps !== undefined) {\n            deps = meta.userDeps;\n        }\n        if (deps !== undefined) {\n            // factory: () => new meta.useClass(...deps)\n            result = compileFactoryFunction(Object.assign(Object.assign({}, factoryMeta), { delegate: meta.useClass, delegateDeps: deps, delegateType: R3FactoryDelegateType.Class }));\n        }\n        else if (useClassOnSelf) {\n            result = compileFactoryFunction(factoryMeta);\n        }\n        else {\n            result = delegateToFactory(meta.type.value, meta.useClass);\n        }\n    }\n    else if (meta.useFactory !== undefined) {\n        if (meta.userDeps !== undefined) {\n            result = compileFactoryFunction(Object.assign(Object.assign({}, factoryMeta), { delegate: meta.useFactory, delegateDeps: meta.userDeps || [], delegateType: R3FactoryDelegateType.Function }));\n        }\n        else {\n            result = {\n                statements: [],\n                factory: fn([], [new ReturnStatement(meta.useFactory.callFn([]))])\n            };\n        }\n    }\n    else if (meta.useValue !== undefined) {\n        // Note: it's safe to use `meta.useValue` instead of the `USE_VALUE in meta` check used for\n        // client code because meta.useValue is an Expression which will be defined even if the actual\n        // value is undefined.\n        result = compileFactoryFunction(Object.assign(Object.assign({}, factoryMeta), { expression: meta.useValue }));\n    }\n    else if (meta.useExisting !== undefined) {\n        // useExisting is an `inject` call on the existing token.\n        result = compileFactoryFunction(Object.assign(Object.assign({}, factoryMeta), { expression: importExpr(Identifiers.inject).callFn([meta.useExisting]) }));\n    }\n    else {\n        result = delegateToFactory(meta.type.value, meta.internalType);\n    }\n    const token = meta.internalType;\n    const injectableProps = { token, factory: result.factory };\n    // Only generate providedIn property if it has a non-null value\n    if (meta.providedIn.value !== null) {\n        injectableProps.providedIn = meta.providedIn;\n    }\n    const expression = importExpr(Identifiers.ɵɵdefineInjectable).callFn([mapToMapExpression(injectableProps)]);\n    const type = new ExpressionType(importExpr(Identifiers.InjectableDef, [typeWithParameters(meta.type.type, meta.typeArgumentCount)]));\n    return {\n        expression,\n        type,\n        statements: result.statements,\n    };\n}\nfunction delegateToFactory(type, internalType) {\n    return {\n        statements: [],\n        // If types are the same, we can generate `factory: type.ɵfac`\n        // If types are different, we have to generate a wrapper function to ensure\n        // the internal type has been resolved (`factory: function(t) { return type.ɵfac(t); }`)\n        factory: type.node === internalType.node ?\n            internalType.prop('ɵfac') :\n            fn([new FnParam('t', DYNAMIC_TYPE)], [new ReturnStatement(internalType.callMethod('ɵfac', [variable('t')]))])\n    };\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction assertArrayOfStrings(identifier, value) {\n    if (value == null) {\n        return;\n    }\n    if (!Array.isArray(value)) {\n        throw new Error(`Expected '${identifier}' to be an array of strings.`);\n    }\n    for (let i = 0; i < value.length; i += 1) {\n        if (typeof value[i] !== 'string') {\n            throw new Error(`Expected '${identifier}' to be an array of strings.`);\n        }\n    }\n}\nconst UNUSABLE_INTERPOLATION_REGEXPS = [\n    /^\\s*$/,\n    /[<>]/,\n    /^[{}]$/,\n    /&(#|[a-z])/i,\n    /^\\/\\//,\n];\nfunction assertInterpolationSymbols(identifier, value) {\n    if (value != null && !(Array.isArray(value) && value.length == 2)) {\n        throw new Error(`Expected '${identifier}' to be an array, [start, end].`);\n    }\n    else if (value != null) {\n        const start = value[0];\n        const end = value[1];\n        // Check for unusable interpolation symbols\n        UNUSABLE_INTERPOLATION_REGEXPS.forEach(regexp => {\n            if (regexp.test(start) || regexp.test(end)) {\n                throw new Error(`['${start}', '${end}'] contains unusable interpolation symbol.`);\n            }\n        });\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass InterpolationConfig {\n    constructor(start, end) {\n        this.start = start;\n        this.end = end;\n    }\n    static fromArray(markers) {\n        if (!markers) {\n            return DEFAULT_INTERPOLATION_CONFIG;\n        }\n        assertInterpolationSymbols('interpolation', markers);\n        return new InterpolationConfig(markers[0], markers[1]);\n    }\n}\nconst DEFAULT_INTERPOLATION_CONFIG = new InterpolationConfig('{{', '}}');\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// https://docs.google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k/edit\nconst VERSION = 3;\nconst JS_B64_PREFIX = '# sourceMappingURL=data:application/json;base64,';\nclass SourceMapGenerator {\n    constructor(file = null) {\n        this.file = file;\n        this.sourcesContent = new Map();\n        this.lines = [];\n        this.lastCol0 = 0;\n        this.hasMappings = false;\n    }\n    // The content is `null` when the content is expected to be loaded using the URL\n    addSource(url, content = null) {\n        if (!this.sourcesContent.has(url)) {\n            this.sourcesContent.set(url, content);\n        }\n        return this;\n    }\n    addLine() {\n        this.lines.push([]);\n        this.lastCol0 = 0;\n        return this;\n    }\n    addMapping(col0, sourceUrl, sourceLine0, sourceCol0) {\n        if (!this.currentLine) {\n            throw new Error(`A line must be added before mappings can be added`);\n        }\n        if (sourceUrl != null && !this.sourcesContent.has(sourceUrl)) {\n            throw new Error(`Unknown source file \"${sourceUrl}\"`);\n        }\n        if (col0 == null) {\n            throw new Error(`The column in the generated code must be provided`);\n        }\n        if (col0 < this.lastCol0) {\n            throw new Error(`Mapping should be added in output order`);\n        }\n        if (sourceUrl && (sourceLine0 == null || sourceCol0 == null)) {\n            throw new Error(`The source location must be provided when a source url is provided`);\n        }\n        this.hasMappings = true;\n        this.lastCol0 = col0;\n        this.currentLine.push({ col0, sourceUrl, sourceLine0, sourceCol0 });\n        return this;\n    }\n    /**\n     * @internal strip this from published d.ts files due to\n     * https://github.com/microsoft/TypeScript/issues/36216\n     */\n    get currentLine() {\n        return this.lines.slice(-1)[0];\n    }\n    toJSON() {\n        if (!this.hasMappings) {\n            return null;\n        }\n        const sourcesIndex = new Map();\n        const sources = [];\n        const sourcesContent = [];\n        Array.from(this.sourcesContent.keys()).forEach((url, i) => {\n            sourcesIndex.set(url, i);\n            sources.push(url);\n            sourcesContent.push(this.sourcesContent.get(url) || null);\n        });\n        let mappings = '';\n        let lastCol0 = 0;\n        let lastSourceIndex = 0;\n        let lastSourceLine0 = 0;\n        let lastSourceCol0 = 0;\n        this.lines.forEach(segments => {\n            lastCol0 = 0;\n            mappings += segments\n                .map(segment => {\n                // zero-based starting column of the line in the generated code\n                let segAsStr = toBase64VLQ(segment.col0 - lastCol0);\n                lastCol0 = segment.col0;\n                if (segment.sourceUrl != null) {\n                    // zero-based index into the “sources” list\n                    segAsStr +=\n                        toBase64VLQ(sourcesIndex.get(segment.sourceUrl) - lastSourceIndex);\n                    lastSourceIndex = sourcesIndex.get(segment.sourceUrl);\n                    // the zero-based starting line in the original source\n                    segAsStr += toBase64VLQ(segment.sourceLine0 - lastSourceLine0);\n                    lastSourceLine0 = segment.sourceLine0;\n                    // the zero-based starting column in the original source\n                    segAsStr += toBase64VLQ(segment.sourceCol0 - lastSourceCol0);\n                    lastSourceCol0 = segment.sourceCol0;\n                }\n                return segAsStr;\n            })\n                .join(',');\n            mappings += ';';\n        });\n        mappings = mappings.slice(0, -1);\n        return {\n            'file': this.file || '',\n            'version': VERSION,\n            'sourceRoot': '',\n            'sources': sources,\n            'sourcesContent': sourcesContent,\n            'mappings': mappings,\n        };\n    }\n    toJsComment() {\n        return this.hasMappings ? '//' + JS_B64_PREFIX + toBase64String(JSON.stringify(this, null, 0)) :\n            '';\n    }\n}\nfunction toBase64String(value) {\n    let b64 = '';\n    value = utf8Encode(value);\n    for (let i = 0; i < value.length;) {\n        const i1 = value.charCodeAt(i++);\n        const i2 = value.charCodeAt(i++);\n        const i3 = value.charCodeAt(i++);\n        b64 += toBase64Digit(i1 >> 2);\n        b64 += toBase64Digit(((i1 & 3) << 4) | (isNaN(i2) ? 0 : i2 >> 4));\n        b64 += isNaN(i2) ? '=' : toBase64Digit(((i2 & 15) << 2) | (i3 >> 6));\n        b64 += isNaN(i2) || isNaN(i3) ? '=' : toBase64Digit(i3 & 63);\n    }\n    return b64;\n}\nfunction toBase64VLQ(value) {\n    value = value < 0 ? ((-value) << 1) + 1 : value << 1;\n    let out = '';\n    do {\n        let digit = value & 31;\n        value = value >> 5;\n        if (value > 0) {\n            digit = digit | 32;\n        }\n        out += toBase64Digit(digit);\n    } while (value > 0);\n    return out;\n}\nconst B64_DIGITS = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';\nfunction toBase64Digit(value) {\n    if (value < 0 || value >= 64) {\n        throw new Error(`Can only encode value in the range [0, 63]`);\n    }\n    return B64_DIGITS[value];\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst _SINGLE_QUOTE_ESCAPE_STRING_RE = /'|\\\\|\\n|\\r|\\$/g;\nconst _LEGAL_IDENTIFIER_RE = /^[$A-Z_][0-9A-Z_$]*$/i;\nconst _INDENT_WITH = '  ';\nconst CATCH_ERROR_VAR$1 = variable('error', null, null);\nconst CATCH_STACK_VAR$1 = variable('stack', null, null);\nclass _EmittedLine {\n    constructor(indent) {\n        this.indent = indent;\n        this.partsLength = 0;\n        this.parts = [];\n        this.srcSpans = [];\n    }\n}\nclass EmitterVisitorContext {\n    constructor(_indent) {\n        this._indent = _indent;\n        this._classes = [];\n        this._preambleLineCount = 0;\n        this._lines = [new _EmittedLine(_indent)];\n    }\n    static createRoot() {\n        return new EmitterVisitorContext(0);\n    }\n    /**\n     * @internal strip this from published d.ts files due to\n     * https://github.com/microsoft/TypeScript/issues/36216\n     */\n    get _currentLine() {\n        return this._lines[this._lines.length - 1];\n    }\n    println(from, lastPart = '') {\n        this.print(from || null, lastPart, true);\n    }\n    lineIsEmpty() {\n        return this._currentLine.parts.length === 0;\n    }\n    lineLength() {\n        return this._currentLine.indent * _INDENT_WITH.length + this._currentLine.partsLength;\n    }\n    print(from, part, newLine = false) {\n        if (part.length > 0) {\n            this._currentLine.parts.push(part);\n            this._currentLine.partsLength += part.length;\n            this._currentLine.srcSpans.push(from && from.sourceSpan || null);\n        }\n        if (newLine) {\n            this._lines.push(new _EmittedLine(this._indent));\n        }\n    }\n    removeEmptyLastLine() {\n        if (this.lineIsEmpty()) {\n            this._lines.pop();\n        }\n    }\n    incIndent() {\n        this._indent++;\n        if (this.lineIsEmpty()) {\n            this._currentLine.indent = this._indent;\n        }\n    }\n    decIndent() {\n        this._indent--;\n        if (this.lineIsEmpty()) {\n            this._currentLine.indent = this._indent;\n        }\n    }\n    pushClass(clazz) {\n        this._classes.push(clazz);\n    }\n    popClass() {\n        return this._classes.pop();\n    }\n    get currentClass() {\n        return this._classes.length > 0 ? this._classes[this._classes.length - 1] : null;\n    }\n    toSource() {\n        return this.sourceLines\n            .map(l => l.parts.length > 0 ? _createIndent(l.indent) + l.parts.join('') : '')\n            .join('\\n');\n    }\n    toSourceMapGenerator(genFilePath, startsAtLine = 0) {\n        const map = new SourceMapGenerator(genFilePath);\n        let firstOffsetMapped = false;\n        const mapFirstOffsetIfNeeded = () => {\n            if (!firstOffsetMapped) {\n                // Add a single space so that tools won't try to load the file from disk.\n                // Note: We are using virtual urls like `ng:///`, so we have to\n                // provide a content here.\n                map.addSource(genFilePath, ' ').addMapping(0, genFilePath, 0, 0);\n                firstOffsetMapped = true;\n            }\n        };\n        for (let i = 0; i < startsAtLine; i++) {\n            map.addLine();\n            mapFirstOffsetIfNeeded();\n        }\n        this.sourceLines.forEach((line, lineIdx) => {\n            map.addLine();\n            const spans = line.srcSpans;\n            const parts = line.parts;\n            let col0 = line.indent * _INDENT_WITH.length;\n            let spanIdx = 0;\n            // skip leading parts without source spans\n            while (spanIdx < spans.length && !spans[spanIdx]) {\n                col0 += parts[spanIdx].length;\n                spanIdx++;\n            }\n            if (spanIdx < spans.length && lineIdx === 0 && col0 === 0) {\n                firstOffsetMapped = true;\n            }\n            else {\n                mapFirstOffsetIfNeeded();\n            }\n            while (spanIdx < spans.length) {\n                const span = spans[spanIdx];\n                const source = span.start.file;\n                const sourceLine = span.start.line;\n                const sourceCol = span.start.col;\n                map.addSource(source.url, source.content)\n                    .addMapping(col0, source.url, sourceLine, sourceCol);\n                col0 += parts[spanIdx].length;\n                spanIdx++;\n                // assign parts without span or the same span to the previous segment\n                while (spanIdx < spans.length && (span === spans[spanIdx] || !spans[spanIdx])) {\n                    col0 += parts[spanIdx].length;\n                    spanIdx++;\n                }\n            }\n        });\n        return map;\n    }\n    setPreambleLineCount(count) {\n        return this._preambleLineCount = count;\n    }\n    spanOf(line, column) {\n        const emittedLine = this._lines[line - this._preambleLineCount];\n        if (emittedLine) {\n            let columnsLeft = column - _createIndent(emittedLine.indent).length;\n            for (let partIndex = 0; partIndex < emittedLine.parts.length; partIndex++) {\n                const part = emittedLine.parts[partIndex];\n                if (part.length > columnsLeft) {\n                    return emittedLine.srcSpans[partIndex];\n                }\n                columnsLeft -= part.length;\n            }\n        }\n        return null;\n    }\n    /**\n     * @internal strip this from published d.ts files due to\n     * https://github.com/microsoft/TypeScript/issues/36216\n     */\n    get sourceLines() {\n        if (this._lines.length && this._lines[this._lines.length - 1].parts.length === 0) {\n            return this._lines.slice(0, -1);\n        }\n        return this._lines;\n    }\n}\nclass AbstractEmitterVisitor {\n    constructor(_escapeDollarInStrings) {\n        this._escapeDollarInStrings = _escapeDollarInStrings;\n    }\n    printLeadingComments(stmt, ctx) {\n        if (stmt.leadingComments === undefined) {\n            return;\n        }\n        for (const comment of stmt.leadingComments) {\n            if (comment instanceof JSDocComment) {\n                ctx.print(stmt, `/*${comment.toString()}*/`, comment.trailingNewline);\n            }\n            else {\n                if (comment.multiline) {\n                    ctx.print(stmt, `/* ${comment.text} */`, comment.trailingNewline);\n                }\n                else {\n                    comment.text.split('\\n').forEach((line) => {\n                        ctx.println(stmt, `// ${line}`);\n                    });\n                }\n            }\n        }\n    }\n    visitExpressionStmt(stmt, ctx) {\n        this.printLeadingComments(stmt, ctx);\n        stmt.expr.visitExpression(this, ctx);\n        ctx.println(stmt, ';');\n        return null;\n    }\n    visitReturnStmt(stmt, ctx) {\n        this.printLeadingComments(stmt, ctx);\n        ctx.print(stmt, `return `);\n        stmt.value.visitExpression(this, ctx);\n        ctx.println(stmt, ';');\n        return null;\n    }\n    visitIfStmt(stmt, ctx) {\n        this.printLeadingComments(stmt, ctx);\n        ctx.print(stmt, `if (`);\n        stmt.condition.visitExpression(this, ctx);\n        ctx.print(stmt, `) {`);\n        const hasElseCase = stmt.falseCase != null && stmt.falseCase.length > 0;\n        if (stmt.trueCase.length <= 1 && !hasElseCase) {\n            ctx.print(stmt, ` `);\n            this.visitAllStatements(stmt.trueCase, ctx);\n            ctx.removeEmptyLastLine();\n            ctx.print(stmt, ` `);\n        }\n        else {\n            ctx.println();\n            ctx.incIndent();\n            this.visitAllStatements(stmt.trueCase, ctx);\n            ctx.decIndent();\n            if (hasElseCase) {\n                ctx.println(stmt, `} else {`);\n                ctx.incIndent();\n                this.visitAllStatements(stmt.falseCase, ctx);\n                ctx.decIndent();\n            }\n        }\n        ctx.println(stmt, `}`);\n        return null;\n    }\n    visitThrowStmt(stmt, ctx) {\n        this.printLeadingComments(stmt, ctx);\n        ctx.print(stmt, `throw `);\n        stmt.error.visitExpression(this, ctx);\n        ctx.println(stmt, `;`);\n        return null;\n    }\n    visitWriteVarExpr(expr, ctx) {\n        const lineWasEmpty = ctx.lineIsEmpty();\n        if (!lineWasEmpty) {\n            ctx.print(expr, '(');\n        }\n        ctx.print(expr, `${expr.name} = `);\n        expr.value.visitExpression(this, ctx);\n        if (!lineWasEmpty) {\n            ctx.print(expr, ')');\n        }\n        return null;\n    }\n    visitWriteKeyExpr(expr, ctx) {\n        const lineWasEmpty = ctx.lineIsEmpty();\n        if (!lineWasEmpty) {\n            ctx.print(expr, '(');\n        }\n        expr.receiver.visitExpression(this, ctx);\n        ctx.print(expr, `[`);\n        expr.index.visitExpression(this, ctx);\n        ctx.print(expr, `] = `);\n        expr.value.visitExpression(this, ctx);\n        if (!lineWasEmpty) {\n            ctx.print(expr, ')');\n        }\n        return null;\n    }\n    visitWritePropExpr(expr, ctx) {\n        const lineWasEmpty = ctx.lineIsEmpty();\n        if (!lineWasEmpty) {\n            ctx.print(expr, '(');\n        }\n        expr.receiver.visitExpression(this, ctx);\n        ctx.print(expr, `.${expr.name} = `);\n        expr.value.visitExpression(this, ctx);\n        if (!lineWasEmpty) {\n            ctx.print(expr, ')');\n        }\n        return null;\n    }\n    visitInvokeMethodExpr(expr, ctx) {\n        expr.receiver.visitExpression(this, ctx);\n        let name = expr.name;\n        if (expr.builtin != null) {\n            name = this.getBuiltinMethodName(expr.builtin);\n            if (name == null) {\n                // some builtins just mean to skip the call.\n                return null;\n            }\n        }\n        ctx.print(expr, `.${name}(`);\n        this.visitAllExpressions(expr.args, ctx, `,`);\n        ctx.print(expr, `)`);\n        return null;\n    }\n    visitInvokeFunctionExpr(expr, ctx) {\n        expr.fn.visitExpression(this, ctx);\n        ctx.print(expr, `(`);\n        this.visitAllExpressions(expr.args, ctx, ',');\n        ctx.print(expr, `)`);\n        return null;\n    }\n    visitWrappedNodeExpr(ast, ctx) {\n        throw new Error('Abstract emitter cannot visit WrappedNodeExpr.');\n    }\n    visitTypeofExpr(expr, ctx) {\n        ctx.print(expr, 'typeof ');\n        expr.expr.visitExpression(this, ctx);\n    }\n    visitReadVarExpr(ast, ctx) {\n        let varName = ast.name;\n        if (ast.builtin != null) {\n            switch (ast.builtin) {\n                case BuiltinVar.Super:\n                    varName = 'super';\n                    break;\n                case BuiltinVar.This:\n                    varName = 'this';\n                    break;\n                case BuiltinVar.CatchError:\n                    varName = CATCH_ERROR_VAR$1.name;\n                    break;\n                case BuiltinVar.CatchStack:\n                    varName = CATCH_STACK_VAR$1.name;\n                    break;\n                default:\n                    throw new Error(`Unknown builtin variable ${ast.builtin}`);\n            }\n        }\n        ctx.print(ast, varName);\n        return null;\n    }\n    visitInstantiateExpr(ast, ctx) {\n        ctx.print(ast, `new `);\n        ast.classExpr.visitExpression(this, ctx);\n        ctx.print(ast, `(`);\n        this.visitAllExpressions(ast.args, ctx, ',');\n        ctx.print(ast, `)`);\n        return null;\n    }\n    visitLiteralExpr(ast, ctx) {\n        const value = ast.value;\n        if (typeof value === 'string') {\n            ctx.print(ast, escapeIdentifier(value, this._escapeDollarInStrings));\n        }\n        else {\n            ctx.print(ast, `${value}`);\n        }\n        return null;\n    }\n    visitLocalizedString(ast, ctx) {\n        const head = ast.serializeI18nHead();\n        ctx.print(ast, '$localize `' + head.raw);\n        for (let i = 1; i < ast.messageParts.length; i++) {\n            ctx.print(ast, '${');\n            ast.expressions[i - 1].visitExpression(this, ctx);\n            ctx.print(ast, `}${ast.serializeI18nTemplatePart(i).raw}`);\n        }\n        ctx.print(ast, '`');\n        return null;\n    }\n    visitConditionalExpr(ast, ctx) {\n        ctx.print(ast, `(`);\n        ast.condition.visitExpression(this, ctx);\n        ctx.print(ast, '? ');\n        ast.trueCase.visitExpression(this, ctx);\n        ctx.print(ast, ': ');\n        ast.falseCase.visitExpression(this, ctx);\n        ctx.print(ast, `)`);\n        return null;\n    }\n    visitNotExpr(ast, ctx) {\n        ctx.print(ast, '!');\n        ast.condition.visitExpression(this, ctx);\n        return null;\n    }\n    visitAssertNotNullExpr(ast, ctx) {\n        ast.condition.visitExpression(this, ctx);\n        return null;\n    }\n    visitUnaryOperatorExpr(ast, ctx) {\n        let opStr;\n        switch (ast.operator) {\n            case UnaryOperator.Plus:\n                opStr = '+';\n                break;\n            case UnaryOperator.Minus:\n                opStr = '-';\n                break;\n            default:\n                throw new Error(`Unknown operator ${ast.operator}`);\n        }\n        if (ast.parens)\n            ctx.print(ast, `(`);\n        ctx.print(ast, opStr);\n        ast.expr.visitExpression(this, ctx);\n        if (ast.parens)\n            ctx.print(ast, `)`);\n        return null;\n    }\n    visitBinaryOperatorExpr(ast, ctx) {\n        let opStr;\n        switch (ast.operator) {\n            case BinaryOperator.Equals:\n                opStr = '==';\n                break;\n            case BinaryOperator.Identical:\n                opStr = '===';\n                break;\n            case BinaryOperator.NotEquals:\n                opStr = '!=';\n                break;\n            case BinaryOperator.NotIdentical:\n                opStr = '!==';\n                break;\n            case BinaryOperator.And:\n                opStr = '&&';\n                break;\n            case BinaryOperator.BitwiseAnd:\n                opStr = '&';\n                break;\n            case BinaryOperator.Or:\n                opStr = '||';\n                break;\n            case BinaryOperator.Plus:\n                opStr = '+';\n                break;\n            case BinaryOperator.Minus:\n                opStr = '-';\n                break;\n            case BinaryOperator.Divide:\n                opStr = '/';\n                break;\n            case BinaryOperator.Multiply:\n                opStr = '*';\n                break;\n            case BinaryOperator.Modulo:\n                opStr = '%';\n                break;\n            case BinaryOperator.Lower:\n                opStr = '<';\n                break;\n            case BinaryOperator.LowerEquals:\n                opStr = '<=';\n                break;\n            case BinaryOperator.Bigger:\n                opStr = '>';\n                break;\n            case BinaryOperator.BiggerEquals:\n                opStr = '>=';\n                break;\n            default:\n                throw new Error(`Unknown operator ${ast.operator}`);\n        }\n        if (ast.parens)\n            ctx.print(ast, `(`);\n        ast.lhs.visitExpression(this, ctx);\n        ctx.print(ast, ` ${opStr} `);\n        ast.rhs.visitExpression(this, ctx);\n        if (ast.parens)\n            ctx.print(ast, `)`);\n        return null;\n    }\n    visitReadPropExpr(ast, ctx) {\n        ast.receiver.visitExpression(this, ctx);\n        ctx.print(ast, `.`);\n        ctx.print(ast, ast.name);\n        return null;\n    }\n    visitReadKeyExpr(ast, ctx) {\n        ast.receiver.visitExpression(this, ctx);\n        ctx.print(ast, `[`);\n        ast.index.visitExpression(this, ctx);\n        ctx.print(ast, `]`);\n        return null;\n    }\n    visitLiteralArrayExpr(ast, ctx) {\n        ctx.print(ast, `[`);\n        this.visitAllExpressions(ast.entries, ctx, ',');\n        ctx.print(ast, `]`);\n        return null;\n    }\n    visitLiteralMapExpr(ast, ctx) {\n        ctx.print(ast, `{`);\n        this.visitAllObjects(entry => {\n            ctx.print(ast, `${escapeIdentifier(entry.key, this._escapeDollarInStrings, entry.quoted)}:`);\n            entry.value.visitExpression(this, ctx);\n        }, ast.entries, ctx, ',');\n        ctx.print(ast, `}`);\n        return null;\n    }\n    visitCommaExpr(ast, ctx) {\n        ctx.print(ast, '(');\n        this.visitAllExpressions(ast.parts, ctx, ',');\n        ctx.print(ast, ')');\n        return null;\n    }\n    visitAllExpressions(expressions, ctx, separator) {\n        this.visitAllObjects(expr => expr.visitExpression(this, ctx), expressions, ctx, separator);\n    }\n    visitAllObjects(handler, expressions, ctx, separator) {\n        let incrementedIndent = false;\n        for (let i = 0; i < expressions.length; i++) {\n            if (i > 0) {\n                if (ctx.lineLength() > 80) {\n                    ctx.print(null, separator, true);\n                    if (!incrementedIndent) {\n                        // continuation are marked with double indent.\n                        ctx.incIndent();\n                        ctx.incIndent();\n                        incrementedIndent = true;\n                    }\n                }\n                else {\n                    ctx.print(null, separator, false);\n                }\n            }\n            handler(expressions[i]);\n        }\n        if (incrementedIndent) {\n            // continuation are marked with double indent.\n            ctx.decIndent();\n            ctx.decIndent();\n        }\n    }\n    visitAllStatements(statements, ctx) {\n        statements.forEach((stmt) => stmt.visitStatement(this, ctx));\n    }\n}\nfunction escapeIdentifier(input, escapeDollar, alwaysQuote = true) {\n    if (input == null) {\n        return null;\n    }\n    const body = input.replace(_SINGLE_QUOTE_ESCAPE_STRING_RE, (...match) => {\n        if (match[0] == '$') {\n            return escapeDollar ? '\\\\$' : '$';\n        }\n        else if (match[0] == '\\n') {\n            return '\\\\n';\n        }\n        else if (match[0] == '\\r') {\n            return '\\\\r';\n        }\n        else {\n            return `\\\\${match[0]}`;\n        }\n    });\n    const requiresQuotes = alwaysQuote || !_LEGAL_IDENTIFIER_RE.test(body);\n    return requiresQuotes ? `'${body}'` : body;\n}\nfunction _createIndent(count) {\n    let res = '';\n    for (let i = 0; i < count; i++) {\n        res += _INDENT_WITH;\n    }\n    return res;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass AbstractJsEmitterVisitor extends AbstractEmitterVisitor {\n    constructor() {\n        super(false);\n    }\n    visitDeclareClassStmt(stmt, ctx) {\n        ctx.pushClass(stmt);\n        this._visitClassConstructor(stmt, ctx);\n        if (stmt.parent != null) {\n            ctx.print(stmt, `${stmt.name}.prototype = Object.create(`);\n            stmt.parent.visitExpression(this, ctx);\n            ctx.println(stmt, `.prototype);`);\n        }\n        stmt.getters.forEach((getter) => this._visitClassGetter(stmt, getter, ctx));\n        stmt.methods.forEach((method) => this._visitClassMethod(stmt, method, ctx));\n        ctx.popClass();\n        return null;\n    }\n    _visitClassConstructor(stmt, ctx) {\n        ctx.print(stmt, `function ${stmt.name}(`);\n        if (stmt.constructorMethod != null) {\n            this._visitParams(stmt.constructorMethod.params, ctx);\n        }\n        ctx.println(stmt, `) {`);\n        ctx.incIndent();\n        if (stmt.constructorMethod != null) {\n            if (stmt.constructorMethod.body.length > 0) {\n                ctx.println(stmt, `var self = this;`);\n                this.visitAllStatements(stmt.constructorMethod.body, ctx);\n            }\n        }\n        ctx.decIndent();\n        ctx.println(stmt, `}`);\n    }\n    _visitClassGetter(stmt, getter, ctx) {\n        ctx.println(stmt, `Object.defineProperty(${stmt.name}.prototype, '${getter.name}', { get: function() {`);\n        ctx.incIndent();\n        if (getter.body.length > 0) {\n            ctx.println(stmt, `var self = this;`);\n            this.visitAllStatements(getter.body, ctx);\n        }\n        ctx.decIndent();\n        ctx.println(stmt, `}});`);\n    }\n    _visitClassMethod(stmt, method, ctx) {\n        ctx.print(stmt, `${stmt.name}.prototype.${method.name} = function(`);\n        this._visitParams(method.params, ctx);\n        ctx.println(stmt, `) {`);\n        ctx.incIndent();\n        if (method.body.length > 0) {\n            ctx.println(stmt, `var self = this;`);\n            this.visitAllStatements(method.body, ctx);\n        }\n        ctx.decIndent();\n        ctx.println(stmt, `};`);\n    }\n    visitWrappedNodeExpr(ast, ctx) {\n        throw new Error('Cannot emit a WrappedNodeExpr in Javascript.');\n    }\n    visitReadVarExpr(ast, ctx) {\n        if (ast.builtin === BuiltinVar.This) {\n            ctx.print(ast, 'self');\n        }\n        else if (ast.builtin === BuiltinVar.Super) {\n            throw new Error(`'super' needs to be handled at a parent ast node, not at the variable level!`);\n        }\n        else {\n            super.visitReadVarExpr(ast, ctx);\n        }\n        return null;\n    }\n    visitDeclareVarStmt(stmt, ctx) {\n        ctx.print(stmt, `var ${stmt.name}`);\n        if (stmt.value) {\n            ctx.print(stmt, ' = ');\n            stmt.value.visitExpression(this, ctx);\n        }\n        ctx.println(stmt, `;`);\n        return null;\n    }\n    visitCastExpr(ast, ctx) {\n        ast.value.visitExpression(this, ctx);\n        return null;\n    }\n    visitInvokeFunctionExpr(expr, ctx) {\n        const fnExpr = expr.fn;\n        if (fnExpr instanceof ReadVarExpr && fnExpr.builtin === BuiltinVar.Super) {\n            ctx.currentClass.parent.visitExpression(this, ctx);\n            ctx.print(expr, `.call(this`);\n            if (expr.args.length > 0) {\n                ctx.print(expr, `, `);\n                this.visitAllExpressions(expr.args, ctx, ',');\n            }\n            ctx.print(expr, `)`);\n        }\n        else {\n            super.visitInvokeFunctionExpr(expr, ctx);\n        }\n        return null;\n    }\n    visitFunctionExpr(ast, ctx) {\n        ctx.print(ast, `function${ast.name ? ' ' + ast.name : ''}(`);\n        this._visitParams(ast.params, ctx);\n        ctx.println(ast, `) {`);\n        ctx.incIndent();\n        this.visitAllStatements(ast.statements, ctx);\n        ctx.decIndent();\n        ctx.print(ast, `}`);\n        return null;\n    }\n    visitDeclareFunctionStmt(stmt, ctx) {\n        ctx.print(stmt, `function ${stmt.name}(`);\n        this._visitParams(stmt.params, ctx);\n        ctx.println(stmt, `) {`);\n        ctx.incIndent();\n        this.visitAllStatements(stmt.statements, ctx);\n        ctx.decIndent();\n        ctx.println(stmt, `}`);\n        return null;\n    }\n    visitTryCatchStmt(stmt, ctx) {\n        ctx.println(stmt, `try {`);\n        ctx.incIndent();\n        this.visitAllStatements(stmt.bodyStmts, ctx);\n        ctx.decIndent();\n        ctx.println(stmt, `} catch (${CATCH_ERROR_VAR$1.name}) {`);\n        ctx.incIndent();\n        const catchStmts = [CATCH_STACK_VAR$1.set(CATCH_ERROR_VAR$1.prop('stack')).toDeclStmt(null, [\n                StmtModifier.Final\n            ])].concat(stmt.catchStmts);\n        this.visitAllStatements(catchStmts, ctx);\n        ctx.decIndent();\n        ctx.println(stmt, `}`);\n        return null;\n    }\n    visitLocalizedString(ast, ctx) {\n        // The following convoluted piece of code is effectively the downlevelled equivalent of\n        // ```\n        // $localize `...`\n        // ```\n        // which is effectively like:\n        // ```\n        // $localize(__makeTemplateObject(cooked, raw), expression1, expression2, ...);\n        // ```\n        //\n        // The `$localize` function expects a \"template object\", which is an array of \"cooked\" strings\n        // plus a `raw` property that contains an array of \"raw\" strings.\n        //\n        // In some environments a helper function called `__makeTemplateObject(cooked, raw)` might be\n        // available, in which case we use that. Otherwise we must create our own helper function\n        // inline.\n        //\n        // In the inline function, if `Object.defineProperty` is available we use that to attach the\n        // `raw` array.\n        ctx.print(ast, '$localize((this&&this.__makeTemplateObject||function(e,t){return Object.defineProperty?Object.defineProperty(e,\"raw\",{value:t}):e.raw=t,e})(');\n        const parts = [ast.serializeI18nHead()];\n        for (let i = 1; i < ast.messageParts.length; i++) {\n            parts.push(ast.serializeI18nTemplatePart(i));\n        }\n        ctx.print(ast, `[${parts.map(part => escapeIdentifier(part.cooked, false)).join(', ')}], `);\n        ctx.print(ast, `[${parts.map(part => escapeIdentifier(part.raw, false)).join(', ')}])`);\n        ast.expressions.forEach(expression => {\n            ctx.print(ast, ', ');\n            expression.visitExpression(this, ctx);\n        });\n        ctx.print(ast, ')');\n        return null;\n    }\n    _visitParams(params, ctx) {\n        this.visitAllObjects(param => ctx.print(null, param.name), params, ctx, ',');\n    }\n    getBuiltinMethodName(method) {\n        let name;\n        switch (method) {\n            case BuiltinMethod.ConcatArray:\n                name = 'concat';\n                break;\n            case BuiltinMethod.SubscribeObservable:\n                name = 'subscribe';\n                break;\n            case BuiltinMethod.Bind:\n                name = 'bind';\n                break;\n            default:\n                throw new Error(`Unknown builtin method: ${method}`);\n        }\n        return name;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * A helper class to manage the evaluation of JIT generated code.\n */\nclass JitEvaluator {\n    /**\n     *\n     * @param sourceUrl The URL of the generated code.\n     * @param statements An array of Angular statement AST nodes to be evaluated.\n     * @param reflector A helper used when converting the statements to executable code.\n     * @param createSourceMaps If true then create a source-map for the generated code and include it\n     * inline as a source-map comment.\n     * @returns A map of all the variables in the generated code.\n     */\n    evaluateStatements(sourceUrl, statements, reflector, createSourceMaps) {\n        const converter = new JitEmitterVisitor(reflector);\n        const ctx = EmitterVisitorContext.createRoot();\n        // Ensure generated code is in strict mode\n        if (statements.length > 0 && !isUseStrictStatement(statements[0])) {\n            statements = [\n                literal('use strict').toStmt(),\n                ...statements,\n            ];\n        }\n        converter.visitAllStatements(statements, ctx);\n        converter.createReturnStmt(ctx);\n        return this.evaluateCode(sourceUrl, ctx, converter.getArgs(), createSourceMaps);\n    }\n    /**\n     * Evaluate a piece of JIT generated code.\n     * @param sourceUrl The URL of this generated code.\n     * @param ctx A context object that contains an AST of the code to be evaluated.\n     * @param vars A map containing the names and values of variables that the evaluated code might\n     * reference.\n     * @param createSourceMap If true then create a source-map for the generated code and include it\n     * inline as a source-map comment.\n     * @returns The result of evaluating the code.\n     */\n    evaluateCode(sourceUrl, ctx, vars, createSourceMap) {\n        let fnBody = `\"use strict\";${ctx.toSource()}\\n//# sourceURL=${sourceUrl}`;\n        const fnArgNames = [];\n        const fnArgValues = [];\n        for (const argName in vars) {\n            fnArgValues.push(vars[argName]);\n            fnArgNames.push(argName);\n        }\n        if (createSourceMap) {\n            // using `new Function(...)` generates a header, 1 line of no arguments, 2 lines otherwise\n            // E.g. ```\n            // function anonymous(a,b,c\n            // /**/) { ... }```\n            // We don't want to hard code this fact, so we auto detect it via an empty function first.\n            const emptyFn = new Function(...fnArgNames.concat('return null;')).toString();\n            const headerLines = emptyFn.slice(0, emptyFn.indexOf('return null;')).split('\\n').length - 1;\n            fnBody += `\\n${ctx.toSourceMapGenerator(sourceUrl, headerLines).toJsComment()}`;\n        }\n        const fn = new Function(...fnArgNames.concat(fnBody));\n        return this.executeFunction(fn, fnArgValues);\n    }\n    /**\n     * Execute a JIT generated function by calling it.\n     *\n     * This method can be overridden in tests to capture the functions that are generated\n     * by this `JitEvaluator` class.\n     *\n     * @param fn A function to execute.\n     * @param args The arguments to pass to the function being executed.\n     * @returns The return value of the executed function.\n     */\n    executeFunction(fn, args) {\n        return fn(...args);\n    }\n}\n/**\n * An Angular AST visitor that converts AST nodes into executable JavaScript code.\n */\nclass JitEmitterVisitor extends AbstractJsEmitterVisitor {\n    constructor(reflector) {\n        super();\n        this.reflector = reflector;\n        this._evalArgNames = [];\n        this._evalArgValues = [];\n        this._evalExportedVars = [];\n    }\n    createReturnStmt(ctx) {\n        const stmt = new ReturnStatement(new LiteralMapExpr(this._evalExportedVars.map(resultVar => new LiteralMapEntry(resultVar, variable(resultVar), false))));\n        stmt.visitStatement(this, ctx);\n    }\n    getArgs() {\n        const result = {};\n        for (let i = 0; i < this._evalArgNames.length; i++) {\n            result[this._evalArgNames[i]] = this._evalArgValues[i];\n        }\n        return result;\n    }\n    visitExternalExpr(ast, ctx) {\n        this._emitReferenceToExternal(ast, this.reflector.resolveExternalReference(ast.value), ctx);\n        return null;\n    }\n    visitWrappedNodeExpr(ast, ctx) {\n        this._emitReferenceToExternal(ast, ast.node, ctx);\n        return null;\n    }\n    visitDeclareVarStmt(stmt, ctx) {\n        if (stmt.hasModifier(StmtModifier.Exported)) {\n            this._evalExportedVars.push(stmt.name);\n        }\n        return super.visitDeclareVarStmt(stmt, ctx);\n    }\n    visitDeclareFunctionStmt(stmt, ctx) {\n        if (stmt.hasModifier(StmtModifier.Exported)) {\n            this._evalExportedVars.push(stmt.name);\n        }\n        return super.visitDeclareFunctionStmt(stmt, ctx);\n    }\n    visitDeclareClassStmt(stmt, ctx) {\n        if (stmt.hasModifier(StmtModifier.Exported)) {\n            this._evalExportedVars.push(stmt.name);\n        }\n        return super.visitDeclareClassStmt(stmt, ctx);\n    }\n    _emitReferenceToExternal(ast, value, ctx) {\n        let id = this._evalArgValues.indexOf(value);\n        if (id === -1) {\n            id = this._evalArgValues.length;\n            this._evalArgValues.push(value);\n            const name = identifierName({ reference: value }) || 'val';\n            this._evalArgNames.push(`jit_${name}_${id}`);\n        }\n        ctx.print(ast, this._evalArgNames[id]);\n    }\n}\nfunction isUseStrictStatement(statement) {\n    return statement.isEquivalent(literal('use strict').toStmt());\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Implementation of `CompileReflector` which resolves references to @angular/core\n * symbols at runtime, according to a consumer-provided mapping.\n *\n * Only supports `resolveExternalReference`, all other methods throw.\n */\nclass R3JitReflector {\n    constructor(context) {\n        this.context = context;\n    }\n    resolveExternalReference(ref) {\n        // This reflector only handles @angular/core imports.\n        if (ref.moduleName !== '@angular/core') {\n            throw new Error(`Cannot resolve external reference to ${ref.moduleName}, only references to @angular/core are supported.`);\n        }\n        if (!this.context.hasOwnProperty(ref.name)) {\n            throw new Error(`No value provided for @angular/core symbol '${ref.name}'.`);\n        }\n        return this.context[ref.name];\n    }\n    parameters(typeOrFunc) {\n        throw new Error('Not implemented.');\n    }\n    annotations(typeOrFunc) {\n        throw new Error('Not implemented.');\n    }\n    shallowAnnotations(typeOrFunc) {\n        throw new Error('Not implemented.');\n    }\n    tryAnnotations(typeOrFunc) {\n        throw new Error('Not implemented.');\n    }\n    propMetadata(typeOrFunc) {\n        throw new Error('Not implemented.');\n    }\n    hasLifecycleHook(type, lcProperty) {\n        throw new Error('Not implemented.');\n    }\n    guards(typeOrFunc) {\n        throw new Error('Not implemented.');\n    }\n    componentModuleUrl(type, cmpMetadata) {\n        throw new Error('Not implemented.');\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction mapEntry(key, value) {\n    return { key, value, quoted: false };\n}\nfunction mapLiteral(obj, quoted = false) {\n    return literalMap(Object.keys(obj).map(key => ({\n        key,\n        quoted,\n        value: obj[key],\n    })));\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Construct an `R3NgModuleDef` for the given `R3NgModuleMetadata`.\n */\nfunction compileNgModule(meta) {\n    const { internalType, type: moduleType, bootstrap, declarations, imports, exports, schemas, containsForwardDecls, emitInline, id } = meta;\n    const additionalStatements = [];\n    const definitionMap = { type: internalType };\n    // Only generate the keys in the metadata if the arrays have values.\n    if (bootstrap.length) {\n        definitionMap.bootstrap = refsToArray(bootstrap, containsForwardDecls);\n    }\n    // If requested to emit scope information inline, pass the declarations, imports and exports to\n    // the `ɵɵdefineNgModule` call. The JIT compilation uses this.\n    if (emitInline) {\n        if (declarations.length) {\n            definitionMap.declarations = refsToArray(declarations, containsForwardDecls);\n        }\n        if (imports.length) {\n            definitionMap.imports = refsToArray(imports, containsForwardDecls);\n        }\n        if (exports.length) {\n            definitionMap.exports = refsToArray(exports, containsForwardDecls);\n        }\n    }\n    // If not emitting inline, the scope information is not passed into `ɵɵdefineNgModule` as it would\n    // prevent tree-shaking of the declarations, imports and exports references.\n    else {\n        const setNgModuleScopeCall = generateSetNgModuleScopeCall(meta);\n        if (setNgModuleScopeCall !== null) {\n            additionalStatements.push(setNgModuleScopeCall);\n        }\n    }\n    if (schemas && schemas.length) {\n        definitionMap.schemas = literalArr(schemas.map(ref => ref.value));\n    }\n    if (id) {\n        definitionMap.id = id;\n    }\n    const expression = importExpr(Identifiers$1.defineNgModule).callFn([mapToMapExpression(definitionMap)]);\n    const type = new ExpressionType(importExpr(Identifiers$1.NgModuleDefWithMeta, [\n        new ExpressionType(moduleType.type), tupleTypeOf(declarations), tupleTypeOf(imports),\n        tupleTypeOf(exports)\n    ]));\n    return { expression, type, additionalStatements };\n}\n/**\n * Generates a function call to `ɵɵsetNgModuleScope` with all necessary information so that the\n * transitive module scope can be computed during runtime in JIT mode. This call is marked pure\n * such that the references to declarations, imports and exports may be elided causing these\n * symbols to become tree-shakeable.\n */\nfunction generateSetNgModuleScopeCall(meta) {\n    const { adjacentType: moduleType, declarations, imports, exports, containsForwardDecls } = meta;\n    const scopeMap = {};\n    if (declarations.length) {\n        scopeMap.declarations = refsToArray(declarations, containsForwardDecls);\n    }\n    if (imports.length) {\n        scopeMap.imports = refsToArray(imports, containsForwardDecls);\n    }\n    if (exports.length) {\n        scopeMap.exports = refsToArray(exports, containsForwardDecls);\n    }\n    if (Object.keys(scopeMap).length === 0) {\n        return null;\n    }\n    // setNgModuleScope(...)\n    const fnCall = new InvokeFunctionExpr(\n    /* fn */ importExpr(Identifiers$1.setNgModuleScope), \n    /* args */ [moduleType, mapToMapExpression(scopeMap)]);\n    // (ngJitMode guard) && setNgModuleScope(...)\n    const guardedCall = jitOnlyGuardedExpression(fnCall);\n    // function() { (ngJitMode guard) && setNgModuleScope(...); }\n    const iife = new FunctionExpr(\n    /* params */ [], \n    /* statements */ [guardedCall.toStmt()]);\n    // (function() { (ngJitMode guard) && setNgModuleScope(...); })()\n    const iifeCall = new InvokeFunctionExpr(\n    /* fn */ iife, \n    /* args */ []);\n    return iifeCall.toStmt();\n}\nfunction compileInjector(meta) {\n    const result = compileFactoryFunction({\n        name: meta.name,\n        type: meta.type,\n        internalType: meta.internalType,\n        typeArgumentCount: 0,\n        deps: meta.deps,\n        injectFn: Identifiers$1.inject,\n        target: R3FactoryTarget.NgModule,\n    });\n    const definitionMap = {\n        factory: result.factory,\n    };\n    if (meta.providers !== null) {\n        definitionMap.providers = meta.providers;\n    }\n    if (meta.imports.length > 0) {\n        definitionMap.imports = literalArr(meta.imports);\n    }\n    const expression = importExpr(Identifiers$1.defineInjector).callFn([mapToMapExpression(definitionMap)]);\n    const type = new ExpressionType(importExpr(Identifiers$1.InjectorDef, [new ExpressionType(meta.type.type)]));\n    return { expression, type, statements: result.statements };\n}\n// TODO(alxhub): integrate this with `compileNgModule`. Currently the two are separate operations.\nfunction compileNgModuleFromRender2(ctx, ngModule, injectableCompiler) {\n    const className = identifierName(ngModule.type);\n    const rawImports = ngModule.rawImports ? [ngModule.rawImports] : [];\n    const rawExports = ngModule.rawExports ? [ngModule.rawExports] : [];\n    const injectorDefArg = mapLiteral({\n        'factory': injectableCompiler.factoryFor({ type: ngModule.type, symbol: ngModule.type.reference }, ctx),\n        'providers': convertMetaToOutput(ngModule.rawProviders, ctx),\n        'imports': convertMetaToOutput([...rawImports, ...rawExports], ctx),\n    });\n    const injectorDef = importExpr(Identifiers$1.defineInjector).callFn([injectorDefArg]);\n    ctx.statements.push(new ClassStmt(\n    /* name */ className, \n    /* parent */ null, \n    /* fields */ [new ClassField(\n        /* name */ 'ɵinj', \n        /* type */ INFERRED_TYPE, \n        /* modifiers */ [StmtModifier.Static], \n        /* initializer */ injectorDef)], \n    /* getters */ [], \n    /* constructorMethod */ new ClassMethod(null, [], []), \n    /* methods */ []));\n}\nfunction accessExportScope(module) {\n    const selectorScope = new ReadPropExpr(module, 'ɵmod');\n    return new ReadPropExpr(selectorScope, 'exported');\n}\nfunction tupleTypeOf(exp) {\n    const types = exp.map(ref => typeofExpr(ref.type));\n    return exp.length > 0 ? expressionType(literalArr(types)) : NONE_TYPE;\n}\nfunction refsToArray(refs, shouldForwardDeclare) {\n    const values = literalArr(refs.map(ref => ref.value));\n    return shouldForwardDeclare ? fn([], [new ReturnStatement(values)]) : values;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction compilePipeFromMetadata(metadata) {\n    const definitionMapValues = [];\n    // e.g. `name: 'myPipe'`\n    definitionMapValues.push({ key: 'name', value: literal(metadata.pipeName), quoted: false });\n    // e.g. `type: MyPipe`\n    definitionMapValues.push({ key: 'type', value: metadata.type.value, quoted: false });\n    // e.g. `pure: true`\n    definitionMapValues.push({ key: 'pure', value: literal(metadata.pure), quoted: false });\n    const expression = importExpr(Identifiers$1.definePipe).callFn([literalMap(definitionMapValues)]);\n    const type = new ExpressionType(importExpr(Identifiers$1.PipeDefWithMeta, [\n        typeWithParameters(metadata.type.type, metadata.typeArgumentCount),\n        new ExpressionType(new LiteralExpr(metadata.pipeName)),\n    ]));\n    return { expression, type };\n}\n/**\n * Write a pipe definition to the output context.\n */\nfunction compilePipeFromRender2(outputCtx, pipe, reflector) {\n    const name = identifierName(pipe.type);\n    if (!name) {\n        return error(`Cannot resolve the name of ${pipe.type}`);\n    }\n    const type = outputCtx.importExpr(pipe.type.reference);\n    const metadata = {\n        name,\n        type: wrapReference(type),\n        internalType: type,\n        pipeName: pipe.name,\n        typeArgumentCount: 0,\n        deps: dependenciesFromGlobalMetadata(pipe.type, outputCtx, reflector),\n        pure: pipe.pure,\n    };\n    const res = compilePipeFromMetadata(metadata);\n    const factoryRes = compileFactoryFunction(Object.assign(Object.assign({}, metadata), { injectFn: Identifiers$1.directiveInject, target: R3FactoryTarget.Pipe }));\n    const definitionField = outputCtx.constantPool.propertyNameOf(3 /* Pipe */);\n    const ngFactoryDefStatement = new ClassStmt(\n    /* name */ name, \n    /* parent */ null, \n    /* fields */\n    [new ClassField(\n        /* name */ 'ɵfac', \n        /* type */ INFERRED_TYPE, \n        /* modifiers */ [StmtModifier.Static], \n        /* initializer */ factoryRes.factory)], \n    /* getters */ [], \n    /* constructorMethod */ new ClassMethod(null, [], []), \n    /* methods */ []);\n    const pipeDefStatement = new ClassStmt(\n    /* name */ name, \n    /* parent */ null, \n    /* fields */ [new ClassField(\n        /* name */ definitionField, \n        /* type */ INFERRED_TYPE, \n        /* modifiers */ [StmtModifier.Static], \n        /* initializer */ res.expression)], \n    /* getters */ [], \n    /* constructorMethod */ new ClassMethod(null, [], []), \n    /* methods */ []);\n    outputCtx.statements.push(ngFactoryDefStatement, pipeDefStatement);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass ParserError {\n    constructor(message, input, errLocation, ctxLocation) {\n        this.input = input;\n        this.errLocation = errLocation;\n        this.ctxLocation = ctxLocation;\n        this.message = `Parser Error: ${message} ${errLocation} [${input}] in ${ctxLocation}`;\n    }\n}\nclass ParseSpan {\n    constructor(start, end) {\n        this.start = start;\n        this.end = end;\n    }\n    toAbsolute(absoluteOffset) {\n        return new AbsoluteSourceSpan(absoluteOffset + this.start, absoluteOffset + this.end);\n    }\n}\nclass AST {\n    constructor(span, \n    /**\n     * Absolute location of the expression AST in a source code file.\n     */\n    sourceSpan) {\n        this.span = span;\n        this.sourceSpan = sourceSpan;\n    }\n    visit(visitor, context = null) {\n        return null;\n    }\n    toString() {\n        return 'AST';\n    }\n}\nclass ASTWithName extends AST {\n    constructor(span, sourceSpan, nameSpan) {\n        super(span, sourceSpan);\n        this.nameSpan = nameSpan;\n    }\n}\n/**\n * Represents a quoted expression of the form:\n *\n * quote = prefix `:` uninterpretedExpression\n * prefix = identifier\n * uninterpretedExpression = arbitrary string\n *\n * A quoted expression is meant to be pre-processed by an AST transformer that\n * converts it into another AST that no longer contains quoted expressions.\n * It is meant to allow third-party developers to extend Angular template\n * expression language. The `uninterpretedExpression` part of the quote is\n * therefore not interpreted by the Angular's own expression parser.\n */\nclass Quote extends AST {\n    constructor(span, sourceSpan, prefix, uninterpretedExpression, location) {\n        super(span, sourceSpan);\n        this.prefix = prefix;\n        this.uninterpretedExpression = uninterpretedExpression;\n        this.location = location;\n    }\n    visit(visitor, context = null) {\n        return visitor.visitQuote(this, context);\n    }\n    toString() {\n        return 'Quote';\n    }\n}\nclass EmptyExpr extends AST {\n    visit(visitor, context = null) {\n        // do nothing\n    }\n}\nclass ImplicitReceiver extends AST {\n    visit(visitor, context = null) {\n        return visitor.visitImplicitReceiver(this, context);\n    }\n}\n/**\n * Multiple expressions separated by a semicolon.\n */\nclass Chain extends AST {\n    constructor(span, sourceSpan, expressions) {\n        super(span, sourceSpan);\n        this.expressions = expressions;\n    }\n    visit(visitor, context = null) {\n        return visitor.visitChain(this, context);\n    }\n}\nclass Conditional extends AST {\n    constructor(span, sourceSpan, condition, trueExp, falseExp) {\n        super(span, sourceSpan);\n        this.condition = condition;\n        this.trueExp = trueExp;\n        this.falseExp = falseExp;\n    }\n    visit(visitor, context = null) {\n        return visitor.visitConditional(this, context);\n    }\n}\nclass PropertyRead extends ASTWithName {\n    constructor(span, sourceSpan, nameSpan, receiver, name) {\n        super(span, sourceSpan, nameSpan);\n        this.receiver = receiver;\n        this.name = name;\n    }\n    visit(visitor, context = null) {\n        return visitor.visitPropertyRead(this, context);\n    }\n}\nclass PropertyWrite extends ASTWithName {\n    constructor(span, sourceSpan, nameSpan, receiver, name, value) {\n        super(span, sourceSpan, nameSpan);\n        this.receiver = receiver;\n        this.name = name;\n        this.value = value;\n    }\n    visit(visitor, context = null) {\n        return visitor.visitPropertyWrite(this, context);\n    }\n}\nclass SafePropertyRead extends ASTWithName {\n    constructor(span, sourceSpan, nameSpan, receiver, name) {\n        super(span, sourceSpan, nameSpan);\n        this.receiver = receiver;\n        this.name = name;\n    }\n    visit(visitor, context = null) {\n        return visitor.visitSafePropertyRead(this, context);\n    }\n}\nclass KeyedRead extends AST {\n    constructor(span, sourceSpan, obj, key) {\n        super(span, sourceSpan);\n        this.obj = obj;\n        this.key = key;\n    }\n    visit(visitor, context = null) {\n        return visitor.visitKeyedRead(this, context);\n    }\n}\nclass KeyedWrite extends AST {\n    constructor(span, sourceSpan, obj, key, value) {\n        super(span, sourceSpan);\n        this.obj = obj;\n        this.key = key;\n        this.value = value;\n    }\n    visit(visitor, context = null) {\n        return visitor.visitKeyedWrite(this, context);\n    }\n}\nclass BindingPipe extends ASTWithName {\n    constructor(span, sourceSpan, exp, name, args, nameSpan) {\n        super(span, sourceSpan, nameSpan);\n        this.exp = exp;\n        this.name = name;\n        this.args = args;\n    }\n    visit(visitor, context = null) {\n        return visitor.visitPipe(this, context);\n    }\n}\nclass LiteralPrimitive extends AST {\n    constructor(span, sourceSpan, value) {\n        super(span, sourceSpan);\n        this.value = value;\n    }\n    visit(visitor, context = null) {\n        return visitor.visitLiteralPrimitive(this, context);\n    }\n}\nclass LiteralArray extends AST {\n    constructor(span, sourceSpan, expressions) {\n        super(span, sourceSpan);\n        this.expressions = expressions;\n    }\n    visit(visitor, context = null) {\n        return visitor.visitLiteralArray(this, context);\n    }\n}\nclass LiteralMap extends AST {\n    constructor(span, sourceSpan, keys, values) {\n        super(span, sourceSpan);\n        this.keys = keys;\n        this.values = values;\n    }\n    visit(visitor, context = null) {\n        return visitor.visitLiteralMap(this, context);\n    }\n}\nclass Interpolation extends AST {\n    constructor(span, sourceSpan, strings, expressions) {\n        super(span, sourceSpan);\n        this.strings = strings;\n        this.expressions = expressions;\n    }\n    visit(visitor, context = null) {\n        return visitor.visitInterpolation(this, context);\n    }\n}\nclass Binary extends AST {\n    constructor(span, sourceSpan, operation, left, right) {\n        super(span, sourceSpan);\n        this.operation = operation;\n        this.left = left;\n        this.right = right;\n    }\n    visit(visitor, context = null) {\n        return visitor.visitBinary(this, context);\n    }\n}\n/**\n * For backwards compatibility reasons, `Unary` inherits from `Binary` and mimics the binary AST\n * node that was originally used. This inheritance relation can be deleted in some future major,\n * after consumers have been given a chance to fully support Unary.\n */\nclass Unary extends Binary {\n    /**\n     * During the deprecation period this constructor is private, to avoid consumers from creating\n     * a `Unary` with the fallback properties for `Binary`.\n     */\n    constructor(span, sourceSpan, operator, expr, binaryOp, binaryLeft, binaryRight) {\n        super(span, sourceSpan, binaryOp, binaryLeft, binaryRight);\n        this.operator = operator;\n        this.expr = expr;\n    }\n    /**\n     * Creates a unary minus expression \"-x\", represented as `Binary` using \"0 - x\".\n     */\n    static createMinus(span, sourceSpan, expr) {\n        return new Unary(span, sourceSpan, '-', expr, '-', new LiteralPrimitive(span, sourceSpan, 0), expr);\n    }\n    /**\n     * Creates a unary plus expression \"+x\", represented as `Binary` using \"x - 0\".\n     */\n    static createPlus(span, sourceSpan, expr) {\n        return new Unary(span, sourceSpan, '+', expr, '-', expr, new LiteralPrimitive(span, sourceSpan, 0));\n    }\n    visit(visitor, context = null) {\n        if (visitor.visitUnary !== undefined) {\n            return visitor.visitUnary(this, context);\n        }\n        return visitor.visitBinary(this, context);\n    }\n}\nclass PrefixNot extends AST {\n    constructor(span, sourceSpan, expression) {\n        super(span, sourceSpan);\n        this.expression = expression;\n    }\n    visit(visitor, context = null) {\n        return visitor.visitPrefixNot(this, context);\n    }\n}\nclass NonNullAssert extends AST {\n    constructor(span, sourceSpan, expression) {\n        super(span, sourceSpan);\n        this.expression = expression;\n    }\n    visit(visitor, context = null) {\n        return visitor.visitNonNullAssert(this, context);\n    }\n}\nclass MethodCall extends ASTWithName {\n    constructor(span, sourceSpan, nameSpan, receiver, name, args) {\n        super(span, sourceSpan, nameSpan);\n        this.receiver = receiver;\n        this.name = name;\n        this.args = args;\n    }\n    visit(visitor, context = null) {\n        return visitor.visitMethodCall(this, context);\n    }\n}\nclass SafeMethodCall extends ASTWithName {\n    constructor(span, sourceSpan, nameSpan, receiver, name, args) {\n        super(span, sourceSpan, nameSpan);\n        this.receiver = receiver;\n        this.name = name;\n        this.args = args;\n    }\n    visit(visitor, context = null) {\n        return visitor.visitSafeMethodCall(this, context);\n    }\n}\nclass FunctionCall extends AST {\n    constructor(span, sourceSpan, target, args) {\n        super(span, sourceSpan);\n        this.target = target;\n        this.args = args;\n    }\n    visit(visitor, context = null) {\n        return visitor.visitFunctionCall(this, context);\n    }\n}\n/**\n * Records the absolute position of a text span in a source file, where `start` and `end` are the\n * starting and ending byte offsets, respectively, of the text span in a source file.\n */\nclass AbsoluteSourceSpan {\n    constructor(start, end) {\n        this.start = start;\n        this.end = end;\n    }\n}\nclass ASTWithSource extends AST {\n    constructor(ast, source, location, absoluteOffset, errors) {\n        super(new ParseSpan(0, source === null ? 0 : source.length), new AbsoluteSourceSpan(absoluteOffset, source === null ? absoluteOffset : absoluteOffset + source.length));\n        this.ast = ast;\n        this.source = source;\n        this.location = location;\n        this.errors = errors;\n    }\n    visit(visitor, context = null) {\n        if (visitor.visitASTWithSource) {\n            return visitor.visitASTWithSource(this, context);\n        }\n        return this.ast.visit(visitor, context);\n    }\n    toString() {\n        return `${this.source} in ${this.location}`;\n    }\n}\nclass VariableBinding {\n    /**\n     * @param sourceSpan entire span of the binding.\n     * @param key name of the LHS along with its span.\n     * @param value optional value for the RHS along with its span.\n     */\n    constructor(sourceSpan, key, value) {\n        this.sourceSpan = sourceSpan;\n        this.key = key;\n        this.value = value;\n    }\n}\nclass ExpressionBinding {\n    /**\n     * @param sourceSpan entire span of the binding.\n     * @param key binding name, like ngForOf, ngForTrackBy, ngIf, along with its\n     * span. Note that the length of the span may not be the same as\n     * `key.source.length`. For example,\n     * 1. key.source = ngFor, key.span is for \"ngFor\"\n     * 2. key.source = ngForOf, key.span is for \"of\"\n     * 3. key.source = ngForTrackBy, key.span is for \"trackBy\"\n     * @param value optional expression for the RHS.\n     */\n    constructor(sourceSpan, key, value) {\n        this.sourceSpan = sourceSpan;\n        this.key = key;\n        this.value = value;\n    }\n}\nclass RecursiveAstVisitor$1 {\n    visit(ast, context) {\n        // The default implementation just visits every node.\n        // Classes that extend RecursiveAstVisitor should override this function\n        // to selectively visit the specified node.\n        ast.visit(this, context);\n    }\n    visitUnary(ast, context) {\n        this.visit(ast.expr, context);\n    }\n    visitBinary(ast, context) {\n        this.visit(ast.left, context);\n        this.visit(ast.right, context);\n    }\n    visitChain(ast, context) {\n        this.visitAll(ast.expressions, context);\n    }\n    visitConditional(ast, context) {\n        this.visit(ast.condition, context);\n        this.visit(ast.trueExp, context);\n        this.visit(ast.falseExp, context);\n    }\n    visitPipe(ast, context) {\n        this.visit(ast.exp, context);\n        this.visitAll(ast.args, context);\n    }\n    visitFunctionCall(ast, context) {\n        if (ast.target) {\n            this.visit(ast.target, context);\n        }\n        this.visitAll(ast.args, context);\n    }\n    visitImplicitReceiver(ast, context) { }\n    visitInterpolation(ast, context) {\n        this.visitAll(ast.expressions, context);\n    }\n    visitKeyedRead(ast, context) {\n        this.visit(ast.obj, context);\n        this.visit(ast.key, context);\n    }\n    visitKeyedWrite(ast, context) {\n        this.visit(ast.obj, context);\n        this.visit(ast.key, context);\n        this.visit(ast.value, context);\n    }\n    visitLiteralArray(ast, context) {\n        this.visitAll(ast.expressions, context);\n    }\n    visitLiteralMap(ast, context) {\n        this.visitAll(ast.values, context);\n    }\n    visitLiteralPrimitive(ast, context) { }\n    visitMethodCall(ast, context) {\n        this.visit(ast.receiver, context);\n        this.visitAll(ast.args, context);\n    }\n    visitPrefixNot(ast, context) {\n        this.visit(ast.expression, context);\n    }\n    visitNonNullAssert(ast, context) {\n        this.visit(ast.expression, context);\n    }\n    visitPropertyRead(ast, context) {\n        this.visit(ast.receiver, context);\n    }\n    visitPropertyWrite(ast, context) {\n        this.visit(ast.receiver, context);\n        this.visit(ast.value, context);\n    }\n    visitSafePropertyRead(ast, context) {\n        this.visit(ast.receiver, context);\n    }\n    visitSafeMethodCall(ast, context) {\n        this.visit(ast.receiver, context);\n        this.visitAll(ast.args, context);\n    }\n    visitQuote(ast, context) { }\n    // This is not part of the AstVisitor interface, just a helper method\n    visitAll(asts, context) {\n        for (const ast of asts) {\n            this.visit(ast, context);\n        }\n    }\n}\nclass AstTransformer$1 {\n    visitImplicitReceiver(ast, context) {\n        return ast;\n    }\n    visitInterpolation(ast, context) {\n        return new Interpolation(ast.span, ast.sourceSpan, ast.strings, this.visitAll(ast.expressions));\n    }\n    visitLiteralPrimitive(ast, context) {\n        return new LiteralPrimitive(ast.span, ast.sourceSpan, ast.value);\n    }\n    visitPropertyRead(ast, context) {\n        return new PropertyRead(ast.span, ast.sourceSpan, ast.nameSpan, ast.receiver.visit(this), ast.name);\n    }\n    visitPropertyWrite(ast, context) {\n        return new PropertyWrite(ast.span, ast.sourceSpan, ast.nameSpan, ast.receiver.visit(this), ast.name, ast.value.visit(this));\n    }\n    visitSafePropertyRead(ast, context) {\n        return new SafePropertyRead(ast.span, ast.sourceSpan, ast.nameSpan, ast.receiver.visit(this), ast.name);\n    }\n    visitMethodCall(ast, context) {\n        return new MethodCall(ast.span, ast.sourceSpan, ast.nameSpan, ast.receiver.visit(this), ast.name, this.visitAll(ast.args));\n    }\n    visitSafeMethodCall(ast, context) {\n        return new SafeMethodCall(ast.span, ast.sourceSpan, ast.nameSpan, ast.receiver.visit(this), ast.name, this.visitAll(ast.args));\n    }\n    visitFunctionCall(ast, context) {\n        return new FunctionCall(ast.span, ast.sourceSpan, ast.target.visit(this), this.visitAll(ast.args));\n    }\n    visitLiteralArray(ast, context) {\n        return new LiteralArray(ast.span, ast.sourceSpan, this.visitAll(ast.expressions));\n    }\n    visitLiteralMap(ast, context) {\n        return new LiteralMap(ast.span, ast.sourceSpan, ast.keys, this.visitAll(ast.values));\n    }\n    visitUnary(ast, context) {\n        switch (ast.operator) {\n            case '+':\n                return Unary.createPlus(ast.span, ast.sourceSpan, ast.expr.visit(this));\n            case '-':\n                return Unary.createMinus(ast.span, ast.sourceSpan, ast.expr.visit(this));\n            default:\n                throw new Error(`Unknown unary operator ${ast.operator}`);\n        }\n    }\n    visitBinary(ast, context) {\n        return new Binary(ast.span, ast.sourceSpan, ast.operation, ast.left.visit(this), ast.right.visit(this));\n    }\n    visitPrefixNot(ast, context) {\n        return new PrefixNot(ast.span, ast.sourceSpan, ast.expression.visit(this));\n    }\n    visitNonNullAssert(ast, context) {\n        return new NonNullAssert(ast.span, ast.sourceSpan, ast.expression.visit(this));\n    }\n    visitConditional(ast, context) {\n        return new Conditional(ast.span, ast.sourceSpan, ast.condition.visit(this), ast.trueExp.visit(this), ast.falseExp.visit(this));\n    }\n    visitPipe(ast, context) {\n        return new BindingPipe(ast.span, ast.sourceSpan, ast.exp.visit(this), ast.name, this.visitAll(ast.args), ast.nameSpan);\n    }\n    visitKeyedRead(ast, context) {\n        return new KeyedRead(ast.span, ast.sourceSpan, ast.obj.visit(this), ast.key.visit(this));\n    }\n    visitKeyedWrite(ast, context) {\n        return new KeyedWrite(ast.span, ast.sourceSpan, ast.obj.visit(this), ast.key.visit(this), ast.value.visit(this));\n    }\n    visitAll(asts) {\n        const res = [];\n        for (let i = 0; i < asts.length; ++i) {\n            res[i] = asts[i].visit(this);\n        }\n        return res;\n    }\n    visitChain(ast, context) {\n        return new Chain(ast.span, ast.sourceSpan, this.visitAll(ast.expressions));\n    }\n    visitQuote(ast, context) {\n        return new Quote(ast.span, ast.sourceSpan, ast.prefix, ast.uninterpretedExpression, ast.location);\n    }\n}\n// A transformer that only creates new nodes if the transformer makes a change or\n// a change is made a child node.\nclass AstMemoryEfficientTransformer {\n    visitImplicitReceiver(ast, context) {\n        return ast;\n    }\n    visitInterpolation(ast, context) {\n        const expressions = this.visitAll(ast.expressions);\n        if (expressions !== ast.expressions)\n            return new Interpolation(ast.span, ast.sourceSpan, ast.strings, expressions);\n        return ast;\n    }\n    visitLiteralPrimitive(ast, context) {\n        return ast;\n    }\n    visitPropertyRead(ast, context) {\n        const receiver = ast.receiver.visit(this);\n        if (receiver !== ast.receiver) {\n            return new PropertyRead(ast.span, ast.sourceSpan, ast.nameSpan, receiver, ast.name);\n        }\n        return ast;\n    }\n    visitPropertyWrite(ast, context) {\n        const receiver = ast.receiver.visit(this);\n        const value = ast.value.visit(this);\n        if (receiver !== ast.receiver || value !== ast.value) {\n            return new PropertyWrite(ast.span, ast.sourceSpan, ast.nameSpan, receiver, ast.name, value);\n        }\n        return ast;\n    }\n    visitSafePropertyRead(ast, context) {\n        const receiver = ast.receiver.visit(this);\n        if (receiver !== ast.receiver) {\n            return new SafePropertyRead(ast.span, ast.sourceSpan, ast.nameSpan, receiver, ast.name);\n        }\n        return ast;\n    }\n    visitMethodCall(ast, context) {\n        const receiver = ast.receiver.visit(this);\n        const args = this.visitAll(ast.args);\n        if (receiver !== ast.receiver || args !== ast.args) {\n            return new MethodCall(ast.span, ast.sourceSpan, ast.nameSpan, receiver, ast.name, args);\n        }\n        return ast;\n    }\n    visitSafeMethodCall(ast, context) {\n        const receiver = ast.receiver.visit(this);\n        const args = this.visitAll(ast.args);\n        if (receiver !== ast.receiver || args !== ast.args) {\n            return new SafeMethodCall(ast.span, ast.sourceSpan, ast.nameSpan, receiver, ast.name, args);\n        }\n        return ast;\n    }\n    visitFunctionCall(ast, context) {\n        const target = ast.target && ast.target.visit(this);\n        const args = this.visitAll(ast.args);\n        if (target !== ast.target || args !== ast.args) {\n            return new FunctionCall(ast.span, ast.sourceSpan, target, args);\n        }\n        return ast;\n    }\n    visitLiteralArray(ast, context) {\n        const expressions = this.visitAll(ast.expressions);\n        if (expressions !== ast.expressions) {\n            return new LiteralArray(ast.span, ast.sourceSpan, expressions);\n        }\n        return ast;\n    }\n    visitLiteralMap(ast, context) {\n        const values = this.visitAll(ast.values);\n        if (values !== ast.values) {\n            return new LiteralMap(ast.span, ast.sourceSpan, ast.keys, values);\n        }\n        return ast;\n    }\n    visitUnary(ast, context) {\n        const expr = ast.expr.visit(this);\n        if (expr !== ast.expr) {\n            switch (ast.operator) {\n                case '+':\n                    return Unary.createPlus(ast.span, ast.sourceSpan, expr);\n                case '-':\n                    return Unary.createMinus(ast.span, ast.sourceSpan, expr);\n                default:\n                    throw new Error(`Unknown unary operator ${ast.operator}`);\n            }\n        }\n        return ast;\n    }\n    visitBinary(ast, context) {\n        const left = ast.left.visit(this);\n        const right = ast.right.visit(this);\n        if (left !== ast.left || right !== ast.right) {\n            return new Binary(ast.span, ast.sourceSpan, ast.operation, left, right);\n        }\n        return ast;\n    }\n    visitPrefixNot(ast, context) {\n        const expression = ast.expression.visit(this);\n        if (expression !== ast.expression) {\n            return new PrefixNot(ast.span, ast.sourceSpan, expression);\n        }\n        return ast;\n    }\n    visitNonNullAssert(ast, context) {\n        const expression = ast.expression.visit(this);\n        if (expression !== ast.expression) {\n            return new NonNullAssert(ast.span, ast.sourceSpan, expression);\n        }\n        return ast;\n    }\n    visitConditional(ast, context) {\n        const condition = ast.condition.visit(this);\n        const trueExp = ast.trueExp.visit(this);\n        const falseExp = ast.falseExp.visit(this);\n        if (condition !== ast.condition || trueExp !== ast.trueExp || falseExp !== ast.falseExp) {\n            return new Conditional(ast.span, ast.sourceSpan, condition, trueExp, falseExp);\n        }\n        return ast;\n    }\n    visitPipe(ast, context) {\n        const exp = ast.exp.visit(this);\n        const args = this.visitAll(ast.args);\n        if (exp !== ast.exp || args !== ast.args) {\n            return new BindingPipe(ast.span, ast.sourceSpan, exp, ast.name, args, ast.nameSpan);\n        }\n        return ast;\n    }\n    visitKeyedRead(ast, context) {\n        const obj = ast.obj.visit(this);\n        const key = ast.key.visit(this);\n        if (obj !== ast.obj || key !== ast.key) {\n            return new KeyedRead(ast.span, ast.sourceSpan, obj, key);\n        }\n        return ast;\n    }\n    visitKeyedWrite(ast, context) {\n        const obj = ast.obj.visit(this);\n        const key = ast.key.visit(this);\n        const value = ast.value.visit(this);\n        if (obj !== ast.obj || key !== ast.key || value !== ast.value) {\n            return new KeyedWrite(ast.span, ast.sourceSpan, obj, key, value);\n        }\n        return ast;\n    }\n    visitAll(asts) {\n        const res = [];\n        let modified = false;\n        for (let i = 0; i < asts.length; ++i) {\n            const original = asts[i];\n            const value = original.visit(this);\n            res[i] = value;\n            modified = modified || value !== original;\n        }\n        return modified ? res : asts;\n    }\n    visitChain(ast, context) {\n        const expressions = this.visitAll(ast.expressions);\n        if (expressions !== ast.expressions) {\n            return new Chain(ast.span, ast.sourceSpan, expressions);\n        }\n        return ast;\n    }\n    visitQuote(ast, context) {\n        return ast;\n    }\n}\n// Bindings\nclass ParsedProperty {\n    constructor(name, expression, type, sourceSpan, valueSpan) {\n        this.name = name;\n        this.expression = expression;\n        this.type = type;\n        this.sourceSpan = sourceSpan;\n        this.valueSpan = valueSpan;\n        this.isLiteral = this.type === ParsedPropertyType.LITERAL_ATTR;\n        this.isAnimation = this.type === ParsedPropertyType.ANIMATION;\n    }\n}\nvar ParsedPropertyType;\n(function (ParsedPropertyType) {\n    ParsedPropertyType[ParsedPropertyType[\"DEFAULT\"] = 0] = \"DEFAULT\";\n    ParsedPropertyType[ParsedPropertyType[\"LITERAL_ATTR\"] = 1] = \"LITERAL_ATTR\";\n    ParsedPropertyType[ParsedPropertyType[\"ANIMATION\"] = 2] = \"ANIMATION\";\n})(ParsedPropertyType || (ParsedPropertyType = {}));\nclass ParsedEvent {\n    // Regular events have a target\n    // Animation events have a phase\n    constructor(name, targetOrPhase, type, handler, sourceSpan, handlerSpan) {\n        this.name = name;\n        this.targetOrPhase = targetOrPhase;\n        this.type = type;\n        this.handler = handler;\n        this.sourceSpan = sourceSpan;\n        this.handlerSpan = handlerSpan;\n    }\n}\n/**\n * ParsedVariable represents a variable declaration in a microsyntax expression.\n */\nclass ParsedVariable {\n    constructor(name, value, sourceSpan, keySpan, valueSpan) {\n        this.name = name;\n        this.value = value;\n        this.sourceSpan = sourceSpan;\n        this.keySpan = keySpan;\n        this.valueSpan = valueSpan;\n    }\n}\nclass BoundElementProperty {\n    constructor(name, type, securityContext, value, unit, sourceSpan, valueSpan) {\n        this.name = name;\n        this.type = type;\n        this.securityContext = securityContext;\n        this.value = value;\n        this.unit = unit;\n        this.sourceSpan = sourceSpan;\n        this.valueSpan = valueSpan;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass EventHandlerVars {\n}\nEventHandlerVars.event = variable('$event');\nclass ConvertActionBindingResult {\n    constructor(\n    /**\n     * Render2 compatible statements,\n     */\n    stmts, \n    /**\n     * Variable name used with render2 compatible statements.\n     */\n    allowDefault) {\n        this.stmts = stmts;\n        this.allowDefault = allowDefault;\n        /**\n         * This is bit of a hack. It converts statements which render2 expects to statements which are\n         * expected by render3.\n         *\n         * Example: `<div click=\"doSomething($event)\">` will generate:\n         *\n         * Render3:\n         * ```\n         * const pd_b:any = ((<any>ctx.doSomething($event)) !== false);\n         * return pd_b;\n         * ```\n         *\n         * but render2 expects:\n         * ```\n         * return ctx.doSomething($event);\n         * ```\n         */\n        // TODO(misko): remove this hack once we no longer support ViewEngine.\n        this.render3Stmts = stmts.map((statement) => {\n            if (statement instanceof DeclareVarStmt && statement.name == allowDefault.name &&\n                statement.value instanceof BinaryOperatorExpr) {\n                const lhs = statement.value.lhs;\n                return new ReturnStatement(lhs.value);\n            }\n            return statement;\n        });\n    }\n}\n/**\n * Converts the given expression AST into an executable output AST, assuming the expression is\n * used in an action binding (e.g. an event handler).\n */\nfunction convertActionBinding(localResolver, implicitReceiver, action, bindingId, interpolationFunction, baseSourceSpan, implicitReceiverAccesses) {\n    if (!localResolver) {\n        localResolver = new DefaultLocalResolver();\n    }\n    const actionWithoutBuiltins = convertPropertyBindingBuiltins({\n        createLiteralArrayConverter: (argCount) => {\n            // Note: no caching for literal arrays in actions.\n            return (args) => literalArr(args);\n        },\n        createLiteralMapConverter: (keys) => {\n            // Note: no caching for literal maps in actions.\n            return (values) => {\n                const entries = keys.map((k, i) => ({\n                    key: k.key,\n                    value: values[i],\n                    quoted: k.quoted,\n                }));\n                return literalMap(entries);\n            };\n        },\n        createPipeConverter: (name) => {\n            throw new Error(`Illegal State: Actions are not allowed to contain pipes. Pipe: ${name}`);\n        }\n    }, action);\n    const visitor = new _AstToIrVisitor(localResolver, implicitReceiver, bindingId, interpolationFunction, baseSourceSpan, implicitReceiverAccesses);\n    const actionStmts = [];\n    flattenStatements(actionWithoutBuiltins.visit(visitor, _Mode.Statement), actionStmts);\n    prependTemporaryDecls(visitor.temporaryCount, bindingId, actionStmts);\n    if (visitor.usesImplicitReceiver) {\n        localResolver.notifyImplicitReceiverUse();\n    }\n    const lastIndex = actionStmts.length - 1;\n    let preventDefaultVar = null;\n    if (lastIndex >= 0) {\n        const lastStatement = actionStmts[lastIndex];\n        const returnExpr = convertStmtIntoExpression(lastStatement);\n        if (returnExpr) {\n            // Note: We need to cast the result of the method call to dynamic,\n            // as it might be a void method!\n            preventDefaultVar = createPreventDefaultVar(bindingId);\n            actionStmts[lastIndex] =\n                preventDefaultVar.set(returnExpr.cast(DYNAMIC_TYPE).notIdentical(literal(false)))\n                    .toDeclStmt(null, [StmtModifier.Final]);\n        }\n    }\n    return new ConvertActionBindingResult(actionStmts, preventDefaultVar);\n}\nfunction convertPropertyBindingBuiltins(converterFactory, ast) {\n    return convertBuiltins(converterFactory, ast);\n}\nclass ConvertPropertyBindingResult {\n    constructor(stmts, currValExpr) {\n        this.stmts = stmts;\n        this.currValExpr = currValExpr;\n    }\n}\nvar BindingForm;\n(function (BindingForm) {\n    // The general form of binding expression, supports all expressions.\n    BindingForm[BindingForm[\"General\"] = 0] = \"General\";\n    // Try to generate a simple binding (no temporaries or statements)\n    // otherwise generate a general binding\n    BindingForm[BindingForm[\"TrySimple\"] = 1] = \"TrySimple\";\n    // Inlines assignment of temporaries into the generated expression. The result may still\n    // have statements attached for declarations of temporary variables.\n    // This is the only relevant form for Ivy, the other forms are only used in ViewEngine.\n    BindingForm[BindingForm[\"Expression\"] = 2] = \"Expression\";\n})(BindingForm || (BindingForm = {}));\n/**\n * Converts the given expression AST into an executable output AST, assuming the expression\n * is used in property binding. The expression has to be preprocessed via\n * `convertPropertyBindingBuiltins`.\n */\nfunction convertPropertyBinding(localResolver, implicitReceiver, expressionWithoutBuiltins, bindingId, form, interpolationFunction) {\n    if (!localResolver) {\n        localResolver = new DefaultLocalResolver();\n    }\n    const visitor = new _AstToIrVisitor(localResolver, implicitReceiver, bindingId, interpolationFunction);\n    const outputExpr = expressionWithoutBuiltins.visit(visitor, _Mode.Expression);\n    const stmts = getStatementsFromVisitor(visitor, bindingId);\n    if (visitor.usesImplicitReceiver) {\n        localResolver.notifyImplicitReceiverUse();\n    }\n    if (visitor.temporaryCount === 0 && form == BindingForm.TrySimple) {\n        return new ConvertPropertyBindingResult([], outputExpr);\n    }\n    else if (form === BindingForm.Expression) {\n        return new ConvertPropertyBindingResult(stmts, outputExpr);\n    }\n    const currValExpr = createCurrValueExpr(bindingId);\n    stmts.push(currValExpr.set(outputExpr).toDeclStmt(DYNAMIC_TYPE, [StmtModifier.Final]));\n    return new ConvertPropertyBindingResult(stmts, currValExpr);\n}\n/**\n * Given some expression, such as a binding or interpolation expression, and a context expression to\n * look values up on, visit each facet of the given expression resolving values from the context\n * expression such that a list of arguments can be derived from the found values that can be used as\n * arguments to an external update instruction.\n *\n * @param localResolver The resolver to use to look up expressions by name appropriately\n * @param contextVariableExpression The expression representing the context variable used to create\n * the final argument expressions\n * @param expressionWithArgumentsToExtract The expression to visit to figure out what values need to\n * be resolved and what arguments list to build.\n * @param bindingId A name prefix used to create temporary variable names if they're needed for the\n * arguments generated\n * @returns An array of expressions that can be passed as arguments to instruction expressions like\n * `o.importExpr(R3.propertyInterpolate).callFn(result)`\n */\nfunction convertUpdateArguments(localResolver, contextVariableExpression, expressionWithArgumentsToExtract, bindingId) {\n    const visitor = new _AstToIrVisitor(localResolver, contextVariableExpression, bindingId, undefined);\n    const outputExpr = expressionWithArgumentsToExtract.visit(visitor, _Mode.Expression);\n    if (visitor.usesImplicitReceiver) {\n        localResolver.notifyImplicitReceiverUse();\n    }\n    const stmts = getStatementsFromVisitor(visitor, bindingId);\n    // Removing the first argument, because it was a length for ViewEngine, not Ivy.\n    let args = outputExpr.args.slice(1);\n    if (expressionWithArgumentsToExtract instanceof Interpolation) {\n        // If we're dealing with an interpolation of 1 value with an empty prefix and suffix, reduce the\n        // args returned to just the value, because we're going to pass it to a special instruction.\n        const strings = expressionWithArgumentsToExtract.strings;\n        if (args.length === 3 && strings[0] === '' && strings[1] === '') {\n            // Single argument interpolate instructions.\n            args = [args[1]];\n        }\n        else if (args.length >= 19) {\n            // 19 or more arguments must be passed to the `interpolateV`-style instructions, which accept\n            // an array of arguments\n            args = [literalArr(args)];\n        }\n    }\n    return { stmts, args };\n}\nfunction getStatementsFromVisitor(visitor, bindingId) {\n    const stmts = [];\n    for (let i = 0; i < visitor.temporaryCount; i++) {\n        stmts.push(temporaryDeclaration(bindingId, i));\n    }\n    return stmts;\n}\nfunction convertBuiltins(converterFactory, ast) {\n    const visitor = new _BuiltinAstConverter(converterFactory);\n    return ast.visit(visitor);\n}\nfunction temporaryName(bindingId, temporaryNumber) {\n    return `tmp_${bindingId}_${temporaryNumber}`;\n}\nfunction temporaryDeclaration(bindingId, temporaryNumber) {\n    return new DeclareVarStmt(temporaryName(bindingId, temporaryNumber), NULL_EXPR);\n}\nfunction prependTemporaryDecls(temporaryCount, bindingId, statements) {\n    for (let i = temporaryCount - 1; i >= 0; i--) {\n        statements.unshift(temporaryDeclaration(bindingId, i));\n    }\n}\nvar _Mode;\n(function (_Mode) {\n    _Mode[_Mode[\"Statement\"] = 0] = \"Statement\";\n    _Mode[_Mode[\"Expression\"] = 1] = \"Expression\";\n})(_Mode || (_Mode = {}));\nfunction ensureStatementMode(mode, ast) {\n    if (mode !== _Mode.Statement) {\n        throw new Error(`Expected a statement, but saw ${ast}`);\n    }\n}\nfunction ensureExpressionMode(mode, ast) {\n    if (mode !== _Mode.Expression) {\n        throw new Error(`Expected an expression, but saw ${ast}`);\n    }\n}\nfunction convertToStatementIfNeeded(mode, expr) {\n    if (mode === _Mode.Statement) {\n        return expr.toStmt();\n    }\n    else {\n        return expr;\n    }\n}\nclass _BuiltinAstConverter extends AstTransformer$1 {\n    constructor(_converterFactory) {\n        super();\n        this._converterFactory = _converterFactory;\n    }\n    visitPipe(ast, context) {\n        const args = [ast.exp, ...ast.args].map(ast => ast.visit(this, context));\n        return new BuiltinFunctionCall(ast.span, ast.sourceSpan, args, this._converterFactory.createPipeConverter(ast.name, args.length));\n    }\n    visitLiteralArray(ast, context) {\n        const args = ast.expressions.map(ast => ast.visit(this, context));\n        return new BuiltinFunctionCall(ast.span, ast.sourceSpan, args, this._converterFactory.createLiteralArrayConverter(ast.expressions.length));\n    }\n    visitLiteralMap(ast, context) {\n        const args = ast.values.map(ast => ast.visit(this, context));\n        return new BuiltinFunctionCall(ast.span, ast.sourceSpan, args, this._converterFactory.createLiteralMapConverter(ast.keys));\n    }\n}\nclass _AstToIrVisitor {\n    constructor(_localResolver, _implicitReceiver, bindingId, interpolationFunction, baseSourceSpan, implicitReceiverAccesses) {\n        this._localResolver = _localResolver;\n        this._implicitReceiver = _implicitReceiver;\n        this.bindingId = bindingId;\n        this.interpolationFunction = interpolationFunction;\n        this.baseSourceSpan = baseSourceSpan;\n        this.implicitReceiverAccesses = implicitReceiverAccesses;\n        this._nodeMap = new Map();\n        this._resultMap = new Map();\n        this._currentTemporary = 0;\n        this.temporaryCount = 0;\n        this.usesImplicitReceiver = false;\n    }\n    visitUnary(ast, mode) {\n        let op;\n        switch (ast.operator) {\n            case '+':\n                op = UnaryOperator.Plus;\n                break;\n            case '-':\n                op = UnaryOperator.Minus;\n                break;\n            default:\n                throw new Error(`Unsupported operator ${ast.operator}`);\n        }\n        return convertToStatementIfNeeded(mode, new UnaryOperatorExpr(op, this._visit(ast.expr, _Mode.Expression), undefined, this.convertSourceSpan(ast.span)));\n    }\n    visitBinary(ast, mode) {\n        let op;\n        switch (ast.operation) {\n            case '+':\n                op = BinaryOperator.Plus;\n                break;\n            case '-':\n                op = BinaryOperator.Minus;\n                break;\n            case '*':\n                op = BinaryOperator.Multiply;\n                break;\n            case '/':\n                op = BinaryOperator.Divide;\n                break;\n            case '%':\n                op = BinaryOperator.Modulo;\n                break;\n            case '&&':\n                op = BinaryOperator.And;\n                break;\n            case '||':\n                op = BinaryOperator.Or;\n                break;\n            case '==':\n                op = BinaryOperator.Equals;\n                break;\n            case '!=':\n                op = BinaryOperator.NotEquals;\n                break;\n            case '===':\n                op = BinaryOperator.Identical;\n                break;\n            case '!==':\n                op = BinaryOperator.NotIdentical;\n                break;\n            case '<':\n                op = BinaryOperator.Lower;\n                break;\n            case '>':\n                op = BinaryOperator.Bigger;\n                break;\n            case '<=':\n                op = BinaryOperator.LowerEquals;\n                break;\n            case '>=':\n                op = BinaryOperator.BiggerEquals;\n                break;\n            default:\n                throw new Error(`Unsupported operation ${ast.operation}`);\n        }\n        return convertToStatementIfNeeded(mode, new BinaryOperatorExpr(op, this._visit(ast.left, _Mode.Expression), this._visit(ast.right, _Mode.Expression), undefined, this.convertSourceSpan(ast.span)));\n    }\n    visitChain(ast, mode) {\n        ensureStatementMode(mode, ast);\n        return this.visitAll(ast.expressions, mode);\n    }\n    visitConditional(ast, mode) {\n        const value = this._visit(ast.condition, _Mode.Expression);\n        return convertToStatementIfNeeded(mode, value.conditional(this._visit(ast.trueExp, _Mode.Expression), this._visit(ast.falseExp, _Mode.Expression), this.convertSourceSpan(ast.span)));\n    }\n    visitPipe(ast, mode) {\n        throw new Error(`Illegal state: Pipes should have been converted into functions. Pipe: ${ast.name}`);\n    }\n    visitFunctionCall(ast, mode) {\n        const convertedArgs = this.visitAll(ast.args, _Mode.Expression);\n        let fnResult;\n        if (ast instanceof BuiltinFunctionCall) {\n            fnResult = ast.converter(convertedArgs);\n        }\n        else {\n            fnResult = this._visit(ast.target, _Mode.Expression)\n                .callFn(convertedArgs, this.convertSourceSpan(ast.span));\n        }\n        return convertToStatementIfNeeded(mode, fnResult);\n    }\n    visitImplicitReceiver(ast, mode) {\n        ensureExpressionMode(mode, ast);\n        this.usesImplicitReceiver = true;\n        return this._implicitReceiver;\n    }\n    visitInterpolation(ast, mode) {\n        ensureExpressionMode(mode, ast);\n        const args = [literal(ast.expressions.length)];\n        for (let i = 0; i < ast.strings.length - 1; i++) {\n            args.push(literal(ast.strings[i]));\n            args.push(this._visit(ast.expressions[i], _Mode.Expression));\n        }\n        args.push(literal(ast.strings[ast.strings.length - 1]));\n        if (this.interpolationFunction) {\n            return this.interpolationFunction(args);\n        }\n        return ast.expressions.length <= 9 ?\n            importExpr(Identifiers.inlineInterpolate).callFn(args) :\n            importExpr(Identifiers.interpolate).callFn([\n                args[0], literalArr(args.slice(1), undefined, this.convertSourceSpan(ast.span))\n            ]);\n    }\n    visitKeyedRead(ast, mode) {\n        const leftMostSafe = this.leftMostSafeNode(ast);\n        if (leftMostSafe) {\n            return this.convertSafeAccess(ast, leftMostSafe, mode);\n        }\n        else {\n            return convertToStatementIfNeeded(mode, this._visit(ast.obj, _Mode.Expression).key(this._visit(ast.key, _Mode.Expression)));\n        }\n    }\n    visitKeyedWrite(ast, mode) {\n        const obj = this._visit(ast.obj, _Mode.Expression);\n        const key = this._visit(ast.key, _Mode.Expression);\n        const value = this._visit(ast.value, _Mode.Expression);\n        return convertToStatementIfNeeded(mode, obj.key(key).set(value));\n    }\n    visitLiteralArray(ast, mode) {\n        throw new Error(`Illegal State: literal arrays should have been converted into functions`);\n    }\n    visitLiteralMap(ast, mode) {\n        throw new Error(`Illegal State: literal maps should have been converted into functions`);\n    }\n    visitLiteralPrimitive(ast, mode) {\n        // For literal values of null, undefined, true, or false allow type interference\n        // to infer the type.\n        const type = ast.value === null || ast.value === undefined || ast.value === true || ast.value === true ?\n            INFERRED_TYPE :\n            undefined;\n        return convertToStatementIfNeeded(mode, literal(ast.value, type, this.convertSourceSpan(ast.span)));\n    }\n    _getLocal(name) {\n        return this._localResolver.getLocal(name);\n    }\n    visitMethodCall(ast, mode) {\n        if (ast.receiver instanceof ImplicitReceiver && ast.name == '$any') {\n            const args = this.visitAll(ast.args, _Mode.Expression);\n            if (args.length != 1) {\n                throw new Error(`Invalid call to $any, expected 1 argument but received ${args.length || 'none'}`);\n            }\n            return args[0].cast(DYNAMIC_TYPE, this.convertSourceSpan(ast.span));\n        }\n        const leftMostSafe = this.leftMostSafeNode(ast);\n        if (leftMostSafe) {\n            return this.convertSafeAccess(ast, leftMostSafe, mode);\n        }\n        else {\n            const args = this.visitAll(ast.args, _Mode.Expression);\n            const prevUsesImplicitReceiver = this.usesImplicitReceiver;\n            let result = null;\n            const receiver = this._visit(ast.receiver, _Mode.Expression);\n            if (receiver === this._implicitReceiver) {\n                const varExpr = this._getLocal(ast.name);\n                if (varExpr) {\n                    // Restore the previous \"usesImplicitReceiver\" state since the implicit\n                    // receiver has been replaced with a resolved local expression.\n                    this.usesImplicitReceiver = prevUsesImplicitReceiver;\n                    result = varExpr.callFn(args);\n                }\n                this.addImplicitReceiverAccess(ast.name);\n            }\n            if (result == null) {\n                result = receiver.callMethod(ast.name, args, this.convertSourceSpan(ast.span));\n            }\n            return convertToStatementIfNeeded(mode, result);\n        }\n    }\n    visitPrefixNot(ast, mode) {\n        return convertToStatementIfNeeded(mode, not(this._visit(ast.expression, _Mode.Expression)));\n    }\n    visitNonNullAssert(ast, mode) {\n        return convertToStatementIfNeeded(mode, assertNotNull(this._visit(ast.expression, _Mode.Expression)));\n    }\n    visitPropertyRead(ast, mode) {\n        const leftMostSafe = this.leftMostSafeNode(ast);\n        if (leftMostSafe) {\n            return this.convertSafeAccess(ast, leftMostSafe, mode);\n        }\n        else {\n            let result = null;\n            const prevUsesImplicitReceiver = this.usesImplicitReceiver;\n            const receiver = this._visit(ast.receiver, _Mode.Expression);\n            if (receiver === this._implicitReceiver) {\n                result = this._getLocal(ast.name);\n                if (result) {\n                    // Restore the previous \"usesImplicitReceiver\" state since the implicit\n                    // receiver has been replaced with a resolved local expression.\n                    this.usesImplicitReceiver = prevUsesImplicitReceiver;\n                }\n                this.addImplicitReceiverAccess(ast.name);\n            }\n            if (result == null) {\n                result = receiver.prop(ast.name);\n            }\n            return convertToStatementIfNeeded(mode, result);\n        }\n    }\n    visitPropertyWrite(ast, mode) {\n        const receiver = this._visit(ast.receiver, _Mode.Expression);\n        const prevUsesImplicitReceiver = this.usesImplicitReceiver;\n        let varExpr = null;\n        if (receiver === this._implicitReceiver) {\n            const localExpr = this._getLocal(ast.name);\n            if (localExpr) {\n                if (localExpr instanceof ReadPropExpr) {\n                    // If the local variable is a property read expression, it's a reference\n                    // to a 'context.property' value and will be used as the target of the\n                    // write expression.\n                    varExpr = localExpr;\n                    // Restore the previous \"usesImplicitReceiver\" state since the implicit\n                    // receiver has been replaced with a resolved local expression.\n                    this.usesImplicitReceiver = prevUsesImplicitReceiver;\n                    this.addImplicitReceiverAccess(ast.name);\n                }\n                else {\n                    // Otherwise it's an error.\n                    const receiver = ast.name;\n                    const value = (ast.value instanceof PropertyRead) ? ast.value.name : undefined;\n                    throw new Error(`Cannot assign value \"${value}\" to template variable \"${receiver}\". Template variables are read-only.`);\n                }\n            }\n        }\n        // If no local expression could be produced, use the original receiver's\n        // property as the target.\n        if (varExpr === null) {\n            varExpr = receiver.prop(ast.name);\n        }\n        return convertToStatementIfNeeded(mode, varExpr.set(this._visit(ast.value, _Mode.Expression)));\n    }\n    visitSafePropertyRead(ast, mode) {\n        return this.convertSafeAccess(ast, this.leftMostSafeNode(ast), mode);\n    }\n    visitSafeMethodCall(ast, mode) {\n        return this.convertSafeAccess(ast, this.leftMostSafeNode(ast), mode);\n    }\n    visitAll(asts, mode) {\n        return asts.map(ast => this._visit(ast, mode));\n    }\n    visitQuote(ast, mode) {\n        throw new Error(`Quotes are not supported for evaluation!\n        Statement: ${ast.uninterpretedExpression} located at ${ast.location}`);\n    }\n    _visit(ast, mode) {\n        const result = this._resultMap.get(ast);\n        if (result)\n            return result;\n        return (this._nodeMap.get(ast) || ast).visit(this, mode);\n    }\n    convertSafeAccess(ast, leftMostSafe, mode) {\n        // If the expression contains a safe access node on the left it needs to be converted to\n        // an expression that guards the access to the member by checking the receiver for blank. As\n        // execution proceeds from left to right, the left most part of the expression must be guarded\n        // first but, because member access is left associative, the right side of the expression is at\n        // the top of the AST. The desired result requires lifting a copy of the left part of the\n        // expression up to test it for blank before generating the unguarded version.\n        // Consider, for example the following expression: a?.b.c?.d.e\n        // This results in the ast:\n        //         .\n        //        / \\\n        //       ?.   e\n        //      /  \\\n        //     .    d\n        //    / \\\n        //   ?.  c\n        //  /  \\\n        // a    b\n        // The following tree should be generated:\n        //\n        //        /---- ? ----\\\n        //       /      |      \\\n        //     a   /--- ? ---\\  null\n        //        /     |     \\\n        //       .      .     null\n        //      / \\    / \\\n        //     .  c   .   e\n        //    / \\    / \\\n        //   a   b  .   d\n        //         / \\\n        //        .   c\n        //       / \\\n        //      a   b\n        //\n        // Notice that the first guard condition is the left hand of the left most safe access node\n        // which comes in as leftMostSafe to this routine.\n        let guardedExpression = this._visit(leftMostSafe.receiver, _Mode.Expression);\n        let temporary = undefined;\n        if (this.needsTemporary(leftMostSafe.receiver)) {\n            // If the expression has method calls or pipes then we need to save the result into a\n            // temporary variable to avoid calling stateful or impure code more than once.\n            temporary = this.allocateTemporary();\n            // Preserve the result in the temporary variable\n            guardedExpression = temporary.set(guardedExpression);\n            // Ensure all further references to the guarded expression refer to the temporary instead.\n            this._resultMap.set(leftMostSafe.receiver, temporary);\n        }\n        const condition = guardedExpression.isBlank();\n        // Convert the ast to an unguarded access to the receiver's member. The map will substitute\n        // leftMostNode with its unguarded version in the call to `this.visit()`.\n        if (leftMostSafe instanceof SafeMethodCall) {\n            this._nodeMap.set(leftMostSafe, new MethodCall(leftMostSafe.span, leftMostSafe.sourceSpan, leftMostSafe.nameSpan, leftMostSafe.receiver, leftMostSafe.name, leftMostSafe.args));\n        }\n        else {\n            this._nodeMap.set(leftMostSafe, new PropertyRead(leftMostSafe.span, leftMostSafe.sourceSpan, leftMostSafe.nameSpan, leftMostSafe.receiver, leftMostSafe.name));\n        }\n        // Recursively convert the node now without the guarded member access.\n        const access = this._visit(ast, _Mode.Expression);\n        // Remove the mapping. This is not strictly required as the converter only traverses each node\n        // once but is safer if the conversion is changed to traverse the nodes more than once.\n        this._nodeMap.delete(leftMostSafe);\n        // If we allocated a temporary, release it.\n        if (temporary) {\n            this.releaseTemporary(temporary);\n        }\n        // Produce the conditional\n        return convertToStatementIfNeeded(mode, condition.conditional(literal(null), access));\n    }\n    // Given an expression of the form a?.b.c?.d.e then the left most safe node is\n    // the (a?.b). The . and ?. are left associative thus can be rewritten as:\n    // ((((a?.c).b).c)?.d).e. This returns the most deeply nested safe read or\n    // safe method call as this needs to be transformed initially to:\n    //   a == null ? null : a.c.b.c?.d.e\n    // then to:\n    //   a == null ? null : a.b.c == null ? null : a.b.c.d.e\n    leftMostSafeNode(ast) {\n        const visit = (visitor, ast) => {\n            return (this._nodeMap.get(ast) || ast).visit(visitor);\n        };\n        return ast.visit({\n            visitUnary(ast) {\n                return null;\n            },\n            visitBinary(ast) {\n                return null;\n            },\n            visitChain(ast) {\n                return null;\n            },\n            visitConditional(ast) {\n                return null;\n            },\n            visitFunctionCall(ast) {\n                return null;\n            },\n            visitImplicitReceiver(ast) {\n                return null;\n            },\n            visitInterpolation(ast) {\n                return null;\n            },\n            visitKeyedRead(ast) {\n                return visit(this, ast.obj);\n            },\n            visitKeyedWrite(ast) {\n                return null;\n            },\n            visitLiteralArray(ast) {\n                return null;\n            },\n            visitLiteralMap(ast) {\n                return null;\n            },\n            visitLiteralPrimitive(ast) {\n                return null;\n            },\n            visitMethodCall(ast) {\n                return visit(this, ast.receiver);\n            },\n            visitPipe(ast) {\n                return null;\n            },\n            visitPrefixNot(ast) {\n                return null;\n            },\n            visitNonNullAssert(ast) {\n                return null;\n            },\n            visitPropertyRead(ast) {\n                return visit(this, ast.receiver);\n            },\n            visitPropertyWrite(ast) {\n                return null;\n            },\n            visitQuote(ast) {\n                return null;\n            },\n            visitSafeMethodCall(ast) {\n                return visit(this, ast.receiver) || ast;\n            },\n            visitSafePropertyRead(ast) {\n                return visit(this, ast.receiver) || ast;\n            }\n        });\n    }\n    // Returns true of the AST includes a method or a pipe indicating that, if the\n    // expression is used as the target of a safe property or method access then\n    // the expression should be stored into a temporary variable.\n    needsTemporary(ast) {\n        const visit = (visitor, ast) => {\n            return ast && (this._nodeMap.get(ast) || ast).visit(visitor);\n        };\n        const visitSome = (visitor, ast) => {\n            return ast.some(ast => visit(visitor, ast));\n        };\n        return ast.visit({\n            visitUnary(ast) {\n                return visit(this, ast.expr);\n            },\n            visitBinary(ast) {\n                return visit(this, ast.left) || visit(this, ast.right);\n            },\n            visitChain(ast) {\n                return false;\n            },\n            visitConditional(ast) {\n                return visit(this, ast.condition) || visit(this, ast.trueExp) || visit(this, ast.falseExp);\n            },\n            visitFunctionCall(ast) {\n                return true;\n            },\n            visitImplicitReceiver(ast) {\n                return false;\n            },\n            visitInterpolation(ast) {\n                return visitSome(this, ast.expressions);\n            },\n            visitKeyedRead(ast) {\n                return false;\n            },\n            visitKeyedWrite(ast) {\n                return false;\n            },\n            visitLiteralArray(ast) {\n                return true;\n            },\n            visitLiteralMap(ast) {\n                return true;\n            },\n            visitLiteralPrimitive(ast) {\n                return false;\n            },\n            visitMethodCall(ast) {\n                return true;\n            },\n            visitPipe(ast) {\n                return true;\n            },\n            visitPrefixNot(ast) {\n                return visit(this, ast.expression);\n            },\n            visitNonNullAssert(ast) {\n                return visit(this, ast.expression);\n            },\n            visitPropertyRead(ast) {\n                return false;\n            },\n            visitPropertyWrite(ast) {\n                return false;\n            },\n            visitQuote(ast) {\n                return false;\n            },\n            visitSafeMethodCall(ast) {\n                return true;\n            },\n            visitSafePropertyRead(ast) {\n                return false;\n            }\n        });\n    }\n    allocateTemporary() {\n        const tempNumber = this._currentTemporary++;\n        this.temporaryCount = Math.max(this._currentTemporary, this.temporaryCount);\n        return new ReadVarExpr(temporaryName(this.bindingId, tempNumber));\n    }\n    releaseTemporary(temporary) {\n        this._currentTemporary--;\n        if (temporary.name != temporaryName(this.bindingId, this._currentTemporary)) {\n            throw new Error(`Temporary ${temporary.name} released out of order`);\n        }\n    }\n    /**\n     * Creates an absolute `ParseSourceSpan` from the relative `ParseSpan`.\n     *\n     * `ParseSpan` objects are relative to the start of the expression.\n     * This method converts these to full `ParseSourceSpan` objects that\n     * show where the span is within the overall source file.\n     *\n     * @param span the relative span to convert.\n     * @returns a `ParseSourceSpan` for the given span or null if no\n     * `baseSourceSpan` was provided to this class.\n     */\n    convertSourceSpan(span) {\n        if (this.baseSourceSpan) {\n            const start = this.baseSourceSpan.start.moveBy(span.start);\n            const end = this.baseSourceSpan.start.moveBy(span.end);\n            return new ParseSourceSpan(start, end);\n        }\n        else {\n            return null;\n        }\n    }\n    /** Adds the name of an AST to the list of implicit receiver accesses. */\n    addImplicitReceiverAccess(name) {\n        if (this.implicitReceiverAccesses) {\n            this.implicitReceiverAccesses.add(name);\n        }\n    }\n}\nfunction flattenStatements(arg, output) {\n    if (Array.isArray(arg)) {\n        arg.forEach((entry) => flattenStatements(entry, output));\n    }\n    else {\n        output.push(arg);\n    }\n}\nclass DefaultLocalResolver {\n    notifyImplicitReceiverUse() { }\n    getLocal(name) {\n        if (name === EventHandlerVars.event.name) {\n            return EventHandlerVars.event;\n        }\n        return null;\n    }\n}\nfunction createCurrValueExpr(bindingId) {\n    return variable(`currVal_${bindingId}`); // fix syntax highlighting: `\n}\nfunction createPreventDefaultVar(bindingId) {\n    return variable(`pd_${bindingId}`);\n}\nfunction convertStmtIntoExpression(stmt) {\n    if (stmt instanceof ExpressionStatement) {\n        return stmt.expr;\n    }\n    else if (stmt instanceof ReturnStatement) {\n        return stmt.value;\n    }\n    return null;\n}\nclass BuiltinFunctionCall extends FunctionCall {\n    constructor(span, sourceSpan, args, converter) {\n        super(span, sourceSpan, null, args);\n        this.args = args;\n        this.converter = converter;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * This file is a port of shadowCSS from webcomponents.js to TypeScript.\n *\n * Please make sure to keep to edits in sync with the source file.\n *\n * Source:\n * https://github.com/webcomponents/webcomponentsjs/blob/4efecd7e0e/src/ShadowCSS/ShadowCSS.js\n *\n * The original file level comment is reproduced below\n */\n/*\n  This is a limited shim for ShadowDOM css styling.\n  https://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/shadow/index.html#styles\n\n  The intention here is to support only the styling features which can be\n  relatively simply implemented. The goal is to allow users to avoid the\n  most obvious pitfalls and do so without compromising performance significantly.\n  For ShadowDOM styling that's not covered here, a set of best practices\n  can be provided that should allow users to accomplish more complex styling.\n\n  The following is a list of specific ShadowDOM styling features and a brief\n  discussion of the approach used to shim.\n\n  Shimmed features:\n\n  * :host, :host-context: ShadowDOM allows styling of the shadowRoot's host\n  element using the :host rule. To shim this feature, the :host styles are\n  reformatted and prefixed with a given scope name and promoted to a\n  document level stylesheet.\n  For example, given a scope name of .foo, a rule like this:\n\n    :host {\n        background: red;\n      }\n    }\n\n  becomes:\n\n    .foo {\n      background: red;\n    }\n\n  * encapsulation: Styles defined within ShadowDOM, apply only to\n  dom inside the ShadowDOM. Polymer uses one of two techniques to implement\n  this feature.\n\n  By default, rules are prefixed with the host element tag name\n  as a descendant selector. This ensures styling does not leak out of the 'top'\n  of the element's ShadowDOM. For example,\n\n  div {\n      font-weight: bold;\n    }\n\n  becomes:\n\n  x-foo div {\n      font-weight: bold;\n    }\n\n  becomes:\n\n\n  Alternatively, if WebComponents.ShadowCSS.strictStyling is set to true then\n  selectors are scoped by adding an attribute selector suffix to each\n  simple selector that contains the host element tag name. Each element\n  in the element's ShadowDOM template is also given the scope attribute.\n  Thus, these rules match only elements that have the scope attribute.\n  For example, given a scope name of x-foo, a rule like this:\n\n    div {\n      font-weight: bold;\n    }\n\n  becomes:\n\n    div[x-foo] {\n      font-weight: bold;\n    }\n\n  Note that elements that are dynamically added to a scope must have the scope\n  selector added to them manually.\n\n  * upper/lower bound encapsulation: Styles which are defined outside a\n  shadowRoot should not cross the ShadowDOM boundary and should not apply\n  inside a shadowRoot.\n\n  This styling behavior is not emulated. Some possible ways to do this that\n  were rejected due to complexity and/or performance concerns include: (1) reset\n  every possible property for every possible selector for a given scope name;\n  (2) re-implement css in javascript.\n\n  As an alternative, users should make sure to use selectors\n  specific to the scope in which they are working.\n\n  * ::distributed: This behavior is not emulated. It's often not necessary\n  to style the contents of a specific insertion point and instead, descendants\n  of the host element can be styled selectively. Users can also create an\n  extra node around an insertion point and style that node's contents\n  via descendent selectors. For example, with a shadowRoot like this:\n\n    <style>\n      ::content(div) {\n        background: red;\n      }\n    </style>\n    <content></content>\n\n  could become:\n\n    <style>\n      / *@polyfill .content-container div * /\n      ::content(div) {\n        background: red;\n      }\n    </style>\n    <div class=\"content-container\">\n      <content></content>\n    </div>\n\n  Note the use of @polyfill in the comment above a ShadowDOM specific style\n  declaration. This is a directive to the styling shim to use the selector\n  in comments in lieu of the next selector when running under polyfill.\n*/\nclass ShadowCss {\n    constructor() {\n        this.strictStyling = true;\n    }\n    /*\n     * Shim some cssText with the given selector. Returns cssText that can\n     * be included in the document via WebComponents.ShadowCSS.addCssToDocument(css).\n     *\n     * When strictStyling is true:\n     * - selector is the attribute added to all elements inside the host,\n     * - hostSelector is the attribute added to the host itself.\n     */\n    shimCssText(cssText, selector, hostSelector = '') {\n        const commentsWithHash = extractCommentsWithHash(cssText);\n        cssText = stripComments(cssText);\n        cssText = this._insertDirectives(cssText);\n        const scopedCssText = this._scopeCssText(cssText, selector, hostSelector);\n        return [scopedCssText, ...commentsWithHash].join('\\n');\n    }\n    _insertDirectives(cssText) {\n        cssText = this._insertPolyfillDirectivesInCssText(cssText);\n        return this._insertPolyfillRulesInCssText(cssText);\n    }\n    /*\n     * Process styles to convert native ShadowDOM rules that will trip\n     * up the css parser; we rely on decorating the stylesheet with inert rules.\n     *\n     * For example, we convert this rule:\n     *\n     * polyfill-next-selector { content: ':host menu-item'; }\n     * ::content menu-item {\n     *\n     * to this:\n     *\n     * scopeName menu-item {\n     *\n     **/\n    _insertPolyfillDirectivesInCssText(cssText) {\n        // Difference with webcomponents.js: does not handle comments\n        return cssText.replace(_cssContentNextSelectorRe, function (...m) {\n            return m[2] + '{';\n        });\n    }\n    /*\n     * Process styles to add rules which will only apply under the polyfill\n     *\n     * For example, we convert this rule:\n     *\n     * polyfill-rule {\n     *   content: ':host menu-item';\n     * ...\n     * }\n     *\n     * to this:\n     *\n     * scopeName menu-item {...}\n     *\n     **/\n    _insertPolyfillRulesInCssText(cssText) {\n        // Difference with webcomponents.js: does not handle comments\n        return cssText.replace(_cssContentRuleRe, (...m) => {\n            const rule = m[0].replace(m[1], '').replace(m[2], '');\n            return m[4] + rule;\n        });\n    }\n    /* Ensure styles are scoped. Pseudo-scoping takes a rule like:\n     *\n     *  .foo {... }\n     *\n     *  and converts this to\n     *\n     *  scopeName .foo { ... }\n     */\n    _scopeCssText(cssText, scopeSelector, hostSelector) {\n        const unscopedRules = this._extractUnscopedRulesFromCssText(cssText);\n        // replace :host and :host-context -shadowcsshost and -shadowcsshost respectively\n        cssText = this._insertPolyfillHostInCssText(cssText);\n        cssText = this._convertColonHost(cssText);\n        cssText = this._convertColonHostContext(cssText);\n        cssText = this._convertShadowDOMSelectors(cssText);\n        if (scopeSelector) {\n            cssText = this._scopeSelectors(cssText, scopeSelector, hostSelector);\n        }\n        cssText = cssText + '\\n' + unscopedRules;\n        return cssText.trim();\n    }\n    /*\n     * Process styles to add rules which will only apply under the polyfill\n     * and do not process via CSSOM. (CSSOM is destructive to rules on rare\n     * occasions, e.g. -webkit-calc on Safari.)\n     * For example, we convert this rule:\n     *\n     * @polyfill-unscoped-rule {\n     *   content: 'menu-item';\n     * ... }\n     *\n     * to this:\n     *\n     * menu-item {...}\n     *\n     **/\n    _extractUnscopedRulesFromCssText(cssText) {\n        // Difference with webcomponents.js: does not handle comments\n        let r = '';\n        let m;\n        _cssContentUnscopedRuleRe.lastIndex = 0;\n        while ((m = _cssContentUnscopedRuleRe.exec(cssText)) !== null) {\n            const rule = m[0].replace(m[2], '').replace(m[1], m[4]);\n            r += rule + '\\n\\n';\n        }\n        return r;\n    }\n    /*\n     * convert a rule like :host(.foo) > .bar { }\n     *\n     * to\n     *\n     * .foo<scopeName> > .bar\n     */\n    _convertColonHost(cssText) {\n        return this._convertColonRule(cssText, _cssColonHostRe, this._colonHostPartReplacer);\n    }\n    /*\n     * convert a rule like :host-context(.foo) > .bar { }\n     *\n     * to\n     *\n     * .foo<scopeName> > .bar, .foo scopeName > .bar { }\n     *\n     * and\n     *\n     * :host-context(.foo:host) .bar { ... }\n     *\n     * to\n     *\n     * .foo<scopeName> .bar { ... }\n     */\n    _convertColonHostContext(cssText) {\n        return this._convertColonRule(cssText, _cssColonHostContextRe, this._colonHostContextPartReplacer);\n    }\n    _convertColonRule(cssText, regExp, partReplacer) {\n        // m[1] = :host(-context), m[2] = contents of (), m[3] rest of rule\n        return cssText.replace(regExp, function (...m) {\n            if (m[2]) {\n                const parts = m[2].split(',');\n                const r = [];\n                for (let i = 0; i < parts.length; i++) {\n                    const p = parts[i].trim();\n                    if (!p)\n                        break;\n                    r.push(partReplacer(_polyfillHostNoCombinator, p, m[3]));\n                }\n                return r.join(',');\n            }\n            else {\n                return _polyfillHostNoCombinator + m[3];\n            }\n        });\n    }\n    _colonHostContextPartReplacer(host, part, suffix) {\n        if (part.indexOf(_polyfillHost) > -1) {\n            return this._colonHostPartReplacer(host, part, suffix);\n        }\n        else {\n            return host + part + suffix + ', ' + part + ' ' + host + suffix;\n        }\n    }\n    _colonHostPartReplacer(host, part, suffix) {\n        return host + part.replace(_polyfillHost, '') + suffix;\n    }\n    /*\n     * Convert combinators like ::shadow and pseudo-elements like ::content\n     * by replacing with space.\n     */\n    _convertShadowDOMSelectors(cssText) {\n        return _shadowDOMSelectorsRe.reduce((result, pattern) => result.replace(pattern, ' '), cssText);\n    }\n    // change a selector like 'div' to 'name div'\n    _scopeSelectors(cssText, scopeSelector, hostSelector) {\n        return processRules(cssText, (rule) => {\n            let selector = rule.selector;\n            let content = rule.content;\n            if (rule.selector[0] != '@') {\n                selector =\n                    this._scopeSelector(rule.selector, scopeSelector, hostSelector, this.strictStyling);\n            }\n            else if (rule.selector.startsWith('@media') || rule.selector.startsWith('@supports') ||\n                rule.selector.startsWith('@page') || rule.selector.startsWith('@document')) {\n                content = this._scopeSelectors(rule.content, scopeSelector, hostSelector);\n            }\n            return new CssRule(selector, content);\n        });\n    }\n    _scopeSelector(selector, scopeSelector, hostSelector, strict) {\n        return selector.split(',')\n            .map(part => part.trim().split(_shadowDeepSelectors))\n            .map((deepParts) => {\n            const [shallowPart, ...otherParts] = deepParts;\n            const applyScope = (shallowPart) => {\n                if (this._selectorNeedsScoping(shallowPart, scopeSelector)) {\n                    return strict ?\n                        this._applyStrictSelectorScope(shallowPart, scopeSelector, hostSelector) :\n                        this._applySelectorScope(shallowPart, scopeSelector, hostSelector);\n                }\n                else {\n                    return shallowPart;\n                }\n            };\n            return [applyScope(shallowPart), ...otherParts].join(' ');\n        })\n            .join(', ');\n    }\n    _selectorNeedsScoping(selector, scopeSelector) {\n        const re = this._makeScopeMatcher(scopeSelector);\n        return !re.test(selector);\n    }\n    _makeScopeMatcher(scopeSelector) {\n        const lre = /\\[/g;\n        const rre = /\\]/g;\n        scopeSelector = scopeSelector.replace(lre, '\\\\[').replace(rre, '\\\\]');\n        return new RegExp('^(' + scopeSelector + ')' + _selectorReSuffix, 'm');\n    }\n    _applySelectorScope(selector, scopeSelector, hostSelector) {\n        // Difference from webcomponents.js: scopeSelector could not be an array\n        return this._applySimpleSelectorScope(selector, scopeSelector, hostSelector);\n    }\n    // scope via name and [is=name]\n    _applySimpleSelectorScope(selector, scopeSelector, hostSelector) {\n        // In Android browser, the lastIndex is not reset when the regex is used in String.replace()\n        _polyfillHostRe.lastIndex = 0;\n        if (_polyfillHostRe.test(selector)) {\n            const replaceBy = this.strictStyling ? `[${hostSelector}]` : scopeSelector;\n            return selector\n                .replace(_polyfillHostNoCombinatorRe, (hnc, selector) => {\n                return selector.replace(/([^:]*)(:*)(.*)/, (_, before, colon, after) => {\n                    return before + replaceBy + colon + after;\n                });\n            })\n                .replace(_polyfillHostRe, replaceBy + ' ');\n        }\n        return scopeSelector + ' ' + selector;\n    }\n    // return a selector with [name] suffix on each simple selector\n    // e.g. .foo.bar > .zot becomes .foo[name].bar[name] > .zot[name]  /** @internal */\n    _applyStrictSelectorScope(selector, scopeSelector, hostSelector) {\n        const isRe = /\\[is=([^\\]]*)\\]/g;\n        scopeSelector = scopeSelector.replace(isRe, (_, ...parts) => parts[0]);\n        const attrName = '[' + scopeSelector + ']';\n        const _scopeSelectorPart = (p) => {\n            let scopedP = p.trim();\n            if (!scopedP) {\n                return '';\n            }\n            if (p.indexOf(_polyfillHostNoCombinator) > -1) {\n                scopedP = this._applySimpleSelectorScope(p, scopeSelector, hostSelector);\n            }\n            else {\n                // remove :host since it should be unnecessary\n                const t = p.replace(_polyfillHostRe, '');\n                if (t.length > 0) {\n                    const matches = t.match(/([^:]*)(:*)(.*)/);\n                    if (matches) {\n                        scopedP = matches[1] + attrName + matches[2] + matches[3];\n                    }\n                }\n            }\n            return scopedP;\n        };\n        const safeContent = new SafeSelector(selector);\n        selector = safeContent.content();\n        let scopedSelector = '';\n        let startIndex = 0;\n        let res;\n        const sep = /( |>|\\+|~(?!=))\\s*/g;\n        // If a selector appears before :host it should not be shimmed as it\n        // matches on ancestor elements and not on elements in the host's shadow\n        // `:host-context(div)` is transformed to\n        // `-shadowcsshost-no-combinatordiv, div -shadowcsshost-no-combinator`\n        // the `div` is not part of the component in the 2nd selectors and should not be scoped.\n        // Historically `component-tag:host` was matching the component so we also want to preserve\n        // this behavior to avoid breaking legacy apps (it should not match).\n        // The behavior should be:\n        // - `tag:host` -> `tag[h]` (this is to avoid breaking legacy apps, should not match anything)\n        // - `tag :host` -> `tag [h]` (`tag` is not scoped because it's considered part of a\n        //   `:host-context(tag)`)\n        const hasHost = selector.indexOf(_polyfillHostNoCombinator) > -1;\n        // Only scope parts after the first `-shadowcsshost-no-combinator` when it is present\n        let shouldScope = !hasHost;\n        while ((res = sep.exec(selector)) !== null) {\n            const separator = res[1];\n            const part = selector.slice(startIndex, res.index).trim();\n            shouldScope = shouldScope || part.indexOf(_polyfillHostNoCombinator) > -1;\n            const scopedPart = shouldScope ? _scopeSelectorPart(part) : part;\n            scopedSelector += `${scopedPart} ${separator} `;\n            startIndex = sep.lastIndex;\n        }\n        const part = selector.substring(startIndex);\n        shouldScope = shouldScope || part.indexOf(_polyfillHostNoCombinator) > -1;\n        scopedSelector += shouldScope ? _scopeSelectorPart(part) : part;\n        // replace the placeholders with their original values\n        return safeContent.restore(scopedSelector);\n    }\n    _insertPolyfillHostInCssText(selector) {\n        return selector.replace(_colonHostContextRe, _polyfillHostContext)\n            .replace(_colonHostRe, _polyfillHost);\n    }\n}\nclass SafeSelector {\n    constructor(selector) {\n        this.placeholders = [];\n        this.index = 0;\n        // Replaces attribute selectors with placeholders.\n        // The WS in [attr=\"va lue\"] would otherwise be interpreted as a selector separator.\n        selector = selector.replace(/(\\[[^\\]]*\\])/g, (_, keep) => {\n            const replaceBy = `__ph-${this.index}__`;\n            this.placeholders.push(keep);\n            this.index++;\n            return replaceBy;\n        });\n        // Replaces the expression in `:nth-child(2n + 1)` with a placeholder.\n        // WS and \"+\" would otherwise be interpreted as selector separators.\n        this._content = selector.replace(/(:nth-[-\\w]+)(\\([^)]+\\))/g, (_, pseudo, exp) => {\n            const replaceBy = `__ph-${this.index}__`;\n            this.placeholders.push(exp);\n            this.index++;\n            return pseudo + replaceBy;\n        });\n    }\n    restore(content) {\n        return content.replace(/__ph-(\\d+)__/g, (ph, index) => this.placeholders[+index]);\n    }\n    content() {\n        return this._content;\n    }\n}\nconst _cssContentNextSelectorRe = /polyfill-next-selector[^}]*content:[\\s]*?(['\"])(.*?)\\1[;\\s]*}([^{]*?){/gim;\nconst _cssContentRuleRe = /(polyfill-rule)[^}]*(content:[\\s]*(['\"])(.*?)\\3)[;\\s]*[^}]*}/gim;\nconst _cssContentUnscopedRuleRe = /(polyfill-unscoped-rule)[^}]*(content:[\\s]*(['\"])(.*?)\\3)[;\\s]*[^}]*}/gim;\nconst _polyfillHost = '-shadowcsshost';\n// note: :host-context pre-processed to -shadowcsshostcontext.\nconst _polyfillHostContext = '-shadowcsscontext';\nconst _parenSuffix = ')(?:\\\\((' +\n    '(?:\\\\([^)(]*\\\\)|[^)(]*)+?' +\n    ')\\\\))?([^,{]*)';\nconst _cssColonHostRe = new RegExp('(' + _polyfillHost + _parenSuffix, 'gim');\nconst _cssColonHostContextRe = new RegExp('(' + _polyfillHostContext + _parenSuffix, 'gim');\nconst _polyfillHostNoCombinator = _polyfillHost + '-no-combinator';\nconst _polyfillHostNoCombinatorRe = /-shadowcsshost-no-combinator([^\\s]*)/;\nconst _shadowDOMSelectorsRe = [\n    /::shadow/g,\n    /::content/g,\n    // Deprecated selectors\n    /\\/shadow-deep\\//g,\n    /\\/shadow\\//g,\n];\n// The deep combinator is deprecated in the CSS spec\n// Support for `>>>`, `deep`, `::ng-deep` is then also deprecated and will be removed in the future.\n// see https://github.com/angular/angular/pull/17677\nconst _shadowDeepSelectors = /(?:>>>)|(?:\\/deep\\/)|(?:::ng-deep)/g;\nconst _selectorReSuffix = '([>\\\\s~+\\[.,{:][\\\\s\\\\S]*)?$';\nconst _polyfillHostRe = /-shadowcsshost/gim;\nconst _colonHostRe = /:host/gim;\nconst _colonHostContextRe = /:host-context/gim;\nconst _commentRe = /\\/\\*\\s*[\\s\\S]*?\\*\\//g;\nfunction stripComments(input) {\n    return input.replace(_commentRe, '');\n}\nconst _commentWithHashRe = /\\/\\*\\s*#\\s*source(Mapping)?URL=[\\s\\S]+?\\*\\//g;\nfunction extractCommentsWithHash(input) {\n    return input.match(_commentWithHashRe) || [];\n}\nconst _ruleRe = /(\\s*)([^;\\{\\}]+?)(\\s*)((?:{%BLOCK%}?\\s*;?)|(?:\\s*;))/g;\nconst _curlyRe = /([{}])/g;\nconst OPEN_CURLY = '{';\nconst CLOSE_CURLY = '}';\nconst BLOCK_PLACEHOLDER = '%BLOCK%';\nclass CssRule {\n    constructor(selector, content) {\n        this.selector = selector;\n        this.content = content;\n    }\n}\nfunction processRules(input, ruleCallback) {\n    const inputWithEscapedBlocks = escapeBlocks(input);\n    let nextBlockIndex = 0;\n    return inputWithEscapedBlocks.escapedString.replace(_ruleRe, function (...m) {\n        const selector = m[2];\n        let content = '';\n        let suffix = m[4];\n        let contentPrefix = '';\n        if (suffix && suffix.startsWith('{' + BLOCK_PLACEHOLDER)) {\n            content = inputWithEscapedBlocks.blocks[nextBlockIndex++];\n            suffix = suffix.substring(BLOCK_PLACEHOLDER.length + 1);\n            contentPrefix = '{';\n        }\n        const rule = ruleCallback(new CssRule(selector, content));\n        return `${m[1]}${rule.selector}${m[3]}${contentPrefix}${rule.content}${suffix}`;\n    });\n}\nclass StringWithEscapedBlocks {\n    constructor(escapedString, blocks) {\n        this.escapedString = escapedString;\n        this.blocks = blocks;\n    }\n}\nfunction escapeBlocks(input) {\n    const inputParts = input.split(_curlyRe);\n    const resultParts = [];\n    const escapedBlocks = [];\n    let bracketCount = 0;\n    let currentBlockParts = [];\n    for (let partIndex = 0; partIndex < inputParts.length; partIndex++) {\n        const part = inputParts[partIndex];\n        if (part == CLOSE_CURLY) {\n            bracketCount--;\n        }\n        if (bracketCount > 0) {\n            currentBlockParts.push(part);\n        }\n        else {\n            if (currentBlockParts.length > 0) {\n                escapedBlocks.push(currentBlockParts.join(''));\n                resultParts.push(BLOCK_PLACEHOLDER);\n                currentBlockParts = [];\n            }\n            resultParts.push(part);\n        }\n        if (part == OPEN_CURLY) {\n            bracketCount++;\n        }\n    }\n    if (currentBlockParts.length > 0) {\n        escapedBlocks.push(currentBlockParts.join(''));\n        resultParts.push(BLOCK_PLACEHOLDER);\n    }\n    return new StringWithEscapedBlocks(resultParts.join(''), escapedBlocks);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst COMPONENT_VARIABLE = '%COMP%';\nconst HOST_ATTR = `_nghost-${COMPONENT_VARIABLE}`;\nconst CONTENT_ATTR = `_ngcontent-${COMPONENT_VARIABLE}`;\nclass StylesCompileDependency {\n    constructor(name, moduleUrl, setValue) {\n        this.name = name;\n        this.moduleUrl = moduleUrl;\n        this.setValue = setValue;\n    }\n}\nclass CompiledStylesheet {\n    constructor(outputCtx, stylesVar, dependencies, isShimmed, meta) {\n        this.outputCtx = outputCtx;\n        this.stylesVar = stylesVar;\n        this.dependencies = dependencies;\n        this.isShimmed = isShimmed;\n        this.meta = meta;\n    }\n}\nclass StyleCompiler {\n    constructor(_urlResolver) {\n        this._urlResolver = _urlResolver;\n        this._shadowCss = new ShadowCss();\n    }\n    compileComponent(outputCtx, comp) {\n        const template = comp.template;\n        return this._compileStyles(outputCtx, comp, new CompileStylesheetMetadata({\n            styles: template.styles,\n            styleUrls: template.styleUrls,\n            moduleUrl: identifierModuleUrl(comp.type)\n        }), this.needsStyleShim(comp), true);\n    }\n    compileStyles(outputCtx, comp, stylesheet, shim = this.needsStyleShim(comp)) {\n        return this._compileStyles(outputCtx, comp, stylesheet, shim, false);\n    }\n    needsStyleShim(comp) {\n        return comp.template.encapsulation === ViewEncapsulation.Emulated;\n    }\n    _compileStyles(outputCtx, comp, stylesheet, shim, isComponentStylesheet) {\n        const styleExpressions = stylesheet.styles.map(plainStyle => literal(this._shimIfNeeded(plainStyle, shim)));\n        const dependencies = [];\n        stylesheet.styleUrls.forEach((styleUrl) => {\n            const exprIndex = styleExpressions.length;\n            // Note: This placeholder will be filled later.\n            styleExpressions.push(null);\n            dependencies.push(new StylesCompileDependency(getStylesVarName(null), styleUrl, (value) => styleExpressions[exprIndex] = outputCtx.importExpr(value)));\n        });\n        // styles variable contains plain strings and arrays of other styles arrays (recursive),\n        // so we set its type to dynamic.\n        const stylesVar = getStylesVarName(isComponentStylesheet ? comp : null);\n        const stmt = variable(stylesVar)\n            .set(literalArr(styleExpressions, new ArrayType(DYNAMIC_TYPE, [TypeModifier.Const])))\n            .toDeclStmt(null, isComponentStylesheet ? [StmtModifier.Final] : [\n            StmtModifier.Final, StmtModifier.Exported\n        ]);\n        outputCtx.statements.push(stmt);\n        return new CompiledStylesheet(outputCtx, stylesVar, dependencies, shim, stylesheet);\n    }\n    _shimIfNeeded(style, shim) {\n        return shim ? this._shadowCss.shimCssText(style, CONTENT_ATTR, HOST_ATTR) : style;\n    }\n}\nfunction getStylesVarName(component) {\n    let result = `styles`;\n    if (component) {\n        result += `_${identifierName(component.type)}`;\n    }\n    return result;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * A path is an ordered set of elements. Typically a path is to  a\n * particular offset in a source file. The head of the list is the top\n * most node. The tail is the node that contains the offset directly.\n *\n * For example, the expression `a + b + c` might have an ast that looks\n * like:\n *     +\n *    / \\\n *   a   +\n *      / \\\n *     b   c\n *\n * The path to the node at offset 9 would be `['+' at 1-10, '+' at 7-10,\n * 'c' at 9-10]` and the path the node at offset 1 would be\n * `['+' at 1-10, 'a' at 1-2]`.\n */\nclass AstPath {\n    constructor(path, position = -1) {\n        this.path = path;\n        this.position = position;\n    }\n    get empty() {\n        return !this.path || !this.path.length;\n    }\n    get head() {\n        return this.path[0];\n    }\n    get tail() {\n        return this.path[this.path.length - 1];\n    }\n    parentOf(node) {\n        return node && this.path[this.path.indexOf(node) - 1];\n    }\n    childOf(node) {\n        return this.path[this.path.indexOf(node) + 1];\n    }\n    first(ctor) {\n        for (let i = this.path.length - 1; i >= 0; i--) {\n            let item = this.path[i];\n            if (item instanceof ctor)\n                return item;\n        }\n    }\n    push(node) {\n        this.path.push(node);\n    }\n    pop() {\n        return this.path.pop();\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass NodeWithI18n {\n    constructor(sourceSpan, i18n) {\n        this.sourceSpan = sourceSpan;\n        this.i18n = i18n;\n    }\n}\nclass Text$3 extends NodeWithI18n {\n    constructor(value, sourceSpan, i18n) {\n        super(sourceSpan, i18n);\n        this.value = value;\n    }\n    visit(visitor, context) {\n        return visitor.visitText(this, context);\n    }\n}\nclass Expansion extends NodeWithI18n {\n    constructor(switchValue, type, cases, sourceSpan, switchValueSourceSpan, i18n) {\n        super(sourceSpan, i18n);\n        this.switchValue = switchValue;\n        this.type = type;\n        this.cases = cases;\n        this.switchValueSourceSpan = switchValueSourceSpan;\n    }\n    visit(visitor, context) {\n        return visitor.visitExpansion(this, context);\n    }\n}\nclass ExpansionCase {\n    constructor(value, expression, sourceSpan, valueSourceSpan, expSourceSpan) {\n        this.value = value;\n        this.expression = expression;\n        this.sourceSpan = sourceSpan;\n        this.valueSourceSpan = valueSourceSpan;\n        this.expSourceSpan = expSourceSpan;\n    }\n    visit(visitor, context) {\n        return visitor.visitExpansionCase(this, context);\n    }\n}\nclass Attribute extends NodeWithI18n {\n    constructor(name, value, sourceSpan, valueSpan, i18n) {\n        super(sourceSpan, i18n);\n        this.name = name;\n        this.value = value;\n        this.valueSpan = valueSpan;\n    }\n    visit(visitor, context) {\n        return visitor.visitAttribute(this, context);\n    }\n}\nclass Element$1 extends NodeWithI18n {\n    constructor(name, attrs, children, sourceSpan, startSourceSpan = null, endSourceSpan = null, i18n) {\n        super(sourceSpan, i18n);\n        this.name = name;\n        this.attrs = attrs;\n        this.children = children;\n        this.startSourceSpan = startSourceSpan;\n        this.endSourceSpan = endSourceSpan;\n    }\n    visit(visitor, context) {\n        return visitor.visitElement(this, context);\n    }\n}\nclass Comment {\n    constructor(value, sourceSpan) {\n        this.value = value;\n        this.sourceSpan = sourceSpan;\n    }\n    visit(visitor, context) {\n        return visitor.visitComment(this, context);\n    }\n}\nfunction visitAll$1(visitor, nodes, context = null) {\n    const result = [];\n    const visit = visitor.visit ?\n        (ast) => visitor.visit(ast, context) || ast.visit(visitor, context) :\n        (ast) => ast.visit(visitor, context);\n    nodes.forEach(ast => {\n        const astResult = visit(ast);\n        if (astResult) {\n            result.push(astResult);\n        }\n    });\n    return result;\n}\nclass RecursiveVisitor$1 {\n    constructor() { }\n    visitElement(ast, context) {\n        this.visitChildren(context, visit => {\n            visit(ast.attrs);\n            visit(ast.children);\n        });\n    }\n    visitAttribute(ast, context) { }\n    visitText(ast, context) { }\n    visitComment(ast, context) { }\n    visitExpansion(ast, context) {\n        return this.visitChildren(context, visit => {\n            visit(ast.cases);\n        });\n    }\n    visitExpansionCase(ast, context) { }\n    visitChildren(context, cb) {\n        let results = [];\n        let t = this;\n        function visit(children) {\n            if (children)\n                results.push(visitAll$1(t, children, context));\n        }\n        cb(visit);\n        return Array.prototype.concat.apply([], results);\n    }\n}\nfunction spanOf(ast) {\n    const start = ast.sourceSpan.start.offset;\n    let end = ast.sourceSpan.end.offset;\n    if (ast instanceof Element$1) {\n        if (ast.endSourceSpan) {\n            end = ast.endSourceSpan.end.offset;\n        }\n        else if (ast.children && ast.children.length) {\n            end = spanOf(ast.children[ast.children.length - 1]).end;\n        }\n    }\n    return { start, end };\n}\nfunction findNode(nodes, position) {\n    const path = [];\n    const visitor = new class extends RecursiveVisitor$1 {\n        visit(ast, context) {\n            const span = spanOf(ast);\n            if (span.start <= position && position < span.end) {\n                path.push(ast);\n            }\n            else {\n                // Returning a value here will result in the children being skipped.\n                return true;\n            }\n        }\n    };\n    visitAll$1(visitor, nodes);\n    return new AstPath(path, position);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nvar TokenType;\n(function (TokenType) {\n    TokenType[TokenType[\"TAG_OPEN_START\"] = 0] = \"TAG_OPEN_START\";\n    TokenType[TokenType[\"TAG_OPEN_END\"] = 1] = \"TAG_OPEN_END\";\n    TokenType[TokenType[\"TAG_OPEN_END_VOID\"] = 2] = \"TAG_OPEN_END_VOID\";\n    TokenType[TokenType[\"TAG_CLOSE\"] = 3] = \"TAG_CLOSE\";\n    TokenType[TokenType[\"TEXT\"] = 4] = \"TEXT\";\n    TokenType[TokenType[\"ESCAPABLE_RAW_TEXT\"] = 5] = \"ESCAPABLE_RAW_TEXT\";\n    TokenType[TokenType[\"RAW_TEXT\"] = 6] = \"RAW_TEXT\";\n    TokenType[TokenType[\"COMMENT_START\"] = 7] = \"COMMENT_START\";\n    TokenType[TokenType[\"COMMENT_END\"] = 8] = \"COMMENT_END\";\n    TokenType[TokenType[\"CDATA_START\"] = 9] = \"CDATA_START\";\n    TokenType[TokenType[\"CDATA_END\"] = 10] = \"CDATA_END\";\n    TokenType[TokenType[\"ATTR_NAME\"] = 11] = \"ATTR_NAME\";\n    TokenType[TokenType[\"ATTR_QUOTE\"] = 12] = \"ATTR_QUOTE\";\n    TokenType[TokenType[\"ATTR_VALUE\"] = 13] = \"ATTR_VALUE\";\n    TokenType[TokenType[\"DOC_TYPE\"] = 14] = \"DOC_TYPE\";\n    TokenType[TokenType[\"EXPANSION_FORM_START\"] = 15] = \"EXPANSION_FORM_START\";\n    TokenType[TokenType[\"EXPANSION_CASE_VALUE\"] = 16] = \"EXPANSION_CASE_VALUE\";\n    TokenType[TokenType[\"EXPANSION_CASE_EXP_START\"] = 17] = \"EXPANSION_CASE_EXP_START\";\n    TokenType[TokenType[\"EXPANSION_CASE_EXP_END\"] = 18] = \"EXPANSION_CASE_EXP_END\";\n    TokenType[TokenType[\"EXPANSION_FORM_END\"] = 19] = \"EXPANSION_FORM_END\";\n    TokenType[TokenType[\"EOF\"] = 20] = \"EOF\";\n})(TokenType || (TokenType = {}));\nclass Token {\n    constructor(type, parts, sourceSpan) {\n        this.type = type;\n        this.parts = parts;\n        this.sourceSpan = sourceSpan;\n    }\n}\nclass TokenError extends ParseError {\n    constructor(errorMsg, tokenType, span) {\n        super(span, errorMsg);\n        this.tokenType = tokenType;\n    }\n}\nclass TokenizeResult {\n    constructor(tokens, errors, nonNormalizedIcuExpressions) {\n        this.tokens = tokens;\n        this.errors = errors;\n        this.nonNormalizedIcuExpressions = nonNormalizedIcuExpressions;\n    }\n}\nfunction tokenize(source, url, getTagDefinition, options = {}) {\n    const tokenizer = new _Tokenizer(new ParseSourceFile(source, url), getTagDefinition, options);\n    tokenizer.tokenize();\n    return new TokenizeResult(mergeTextTokens(tokenizer.tokens), tokenizer.errors, tokenizer.nonNormalizedIcuExpressions);\n}\nconst _CR_OR_CRLF_REGEXP = /\\r\\n?/g;\nfunction _unexpectedCharacterErrorMsg(charCode) {\n    const char = charCode === $EOF ? 'EOF' : String.fromCharCode(charCode);\n    return `Unexpected character \"${char}\"`;\n}\nfunction _unknownEntityErrorMsg(entitySrc) {\n    return `Unknown entity \"${entitySrc}\" - use the \"&#<decimal>;\" or  \"&#x<hex>;\" syntax`;\n}\nfunction _unparsableEntityErrorMsg(type, entityStr) {\n    return `Unable to parse entity \"${entityStr}\" - ${type} character reference entities must end with \";\"`;\n}\nvar CharacterReferenceType;\n(function (CharacterReferenceType) {\n    CharacterReferenceType[\"HEX\"] = \"hexadecimal\";\n    CharacterReferenceType[\"DEC\"] = \"decimal\";\n})(CharacterReferenceType || (CharacterReferenceType = {}));\nclass _ControlFlowError {\n    constructor(error) {\n        this.error = error;\n    }\n}\n// See http://www.w3.org/TR/html51/syntax.html#writing\nclass _Tokenizer {\n    /**\n     * @param _file The html source file being tokenized.\n     * @param _getTagDefinition A function that will retrieve a tag definition for a given tag name.\n     * @param options Configuration of the tokenization.\n     */\n    constructor(_file, _getTagDefinition, options) {\n        this._getTagDefinition = _getTagDefinition;\n        this._currentTokenStart = null;\n        this._currentTokenType = null;\n        this._expansionCaseStack = [];\n        this._inInterpolation = false;\n        this.tokens = [];\n        this.errors = [];\n        this.nonNormalizedIcuExpressions = [];\n        this._tokenizeIcu = options.tokenizeExpansionForms || false;\n        this._interpolationConfig = options.interpolationConfig || DEFAULT_INTERPOLATION_CONFIG;\n        this._leadingTriviaCodePoints =\n            options.leadingTriviaChars && options.leadingTriviaChars.map(c => c.codePointAt(0) || 0);\n        const range = options.range || { endPos: _file.content.length, startPos: 0, startLine: 0, startCol: 0 };\n        this._cursor = options.escapedString ? new EscapedCharacterCursor(_file, range) :\n            new PlainCharacterCursor(_file, range);\n        this._preserveLineEndings = options.preserveLineEndings || false;\n        this._escapedString = options.escapedString || false;\n        this._i18nNormalizeLineEndingsInICUs = options.i18nNormalizeLineEndingsInICUs || false;\n        try {\n            this._cursor.init();\n        }\n        catch (e) {\n            this.handleError(e);\n        }\n    }\n    _processCarriageReturns(content) {\n        if (this._preserveLineEndings) {\n            return content;\n        }\n        // http://www.w3.org/TR/html5/syntax.html#preprocessing-the-input-stream\n        // In order to keep the original position in the source, we can not\n        // pre-process it.\n        // Instead CRs are processed right before instantiating the tokens.\n        return content.replace(_CR_OR_CRLF_REGEXP, '\\n');\n    }\n    tokenize() {\n        while (this._cursor.peek() !== $EOF) {\n            const start = this._cursor.clone();\n            try {\n                if (this._attemptCharCode($LT)) {\n                    if (this._attemptCharCode($BANG)) {\n                        if (this._attemptCharCode($LBRACKET)) {\n                            this._consumeCdata(start);\n                        }\n                        else if (this._attemptCharCode($MINUS)) {\n                            this._consumeComment(start);\n                        }\n                        else {\n                            this._consumeDocType(start);\n                        }\n                    }\n                    else if (this._attemptCharCode($SLASH)) {\n                        this._consumeTagClose(start);\n                    }\n                    else {\n                        this._consumeTagOpen(start);\n                    }\n                }\n                else if (!(this._tokenizeIcu && this._tokenizeExpansionForm())) {\n                    this._consumeText();\n                }\n            }\n            catch (e) {\n                this.handleError(e);\n            }\n        }\n        this._beginToken(TokenType.EOF);\n        this._endToken([]);\n    }\n    /**\n     * @returns whether an ICU token has been created\n     * @internal\n     */\n    _tokenizeExpansionForm() {\n        if (this.isExpansionFormStart()) {\n            this._consumeExpansionFormStart();\n            return true;\n        }\n        if (isExpansionCaseStart(this._cursor.peek()) && this._isInExpansionForm()) {\n            this._consumeExpansionCaseStart();\n            return true;\n        }\n        if (this._cursor.peek() === $RBRACE) {\n            if (this._isInExpansionCase()) {\n                this._consumeExpansionCaseEnd();\n                return true;\n            }\n            if (this._isInExpansionForm()) {\n                this._consumeExpansionFormEnd();\n                return true;\n            }\n        }\n        return false;\n    }\n    _beginToken(type, start = this._cursor.clone()) {\n        this._currentTokenStart = start;\n        this._currentTokenType = type;\n    }\n    _endToken(parts, end) {\n        if (this._currentTokenStart === null) {\n            throw new TokenError('Programming error - attempted to end a token when there was no start to the token', this._currentTokenType, this._cursor.getSpan(end));\n        }\n        if (this._currentTokenType === null) {\n            throw new TokenError('Programming error - attempted to end a token which has no token type', null, this._cursor.getSpan(this._currentTokenStart));\n        }\n        const token = new Token(this._currentTokenType, parts, this._cursor.getSpan(this._currentTokenStart, this._leadingTriviaCodePoints));\n        this.tokens.push(token);\n        this._currentTokenStart = null;\n        this._currentTokenType = null;\n        return token;\n    }\n    _createError(msg, span) {\n        if (this._isInExpansionForm()) {\n            msg += ` (Do you have an unescaped \"{\" in your template? Use \"{{ '{' }}\") to escape it.)`;\n        }\n        const error = new TokenError(msg, this._currentTokenType, span);\n        this._currentTokenStart = null;\n        this._currentTokenType = null;\n        return new _ControlFlowError(error);\n    }\n    handleError(e) {\n        if (e instanceof CursorError) {\n            e = this._createError(e.msg, this._cursor.getSpan(e.cursor));\n        }\n        if (e instanceof _ControlFlowError) {\n            this.errors.push(e.error);\n        }\n        else {\n            throw e;\n        }\n    }\n    _attemptCharCode(charCode) {\n        if (this._cursor.peek() === charCode) {\n            this._cursor.advance();\n            return true;\n        }\n        return false;\n    }\n    _attemptCharCodeCaseInsensitive(charCode) {\n        if (compareCharCodeCaseInsensitive(this._cursor.peek(), charCode)) {\n            this._cursor.advance();\n            return true;\n        }\n        return false;\n    }\n    _requireCharCode(charCode) {\n        const location = this._cursor.clone();\n        if (!this._attemptCharCode(charCode)) {\n            throw this._createError(_unexpectedCharacterErrorMsg(this._cursor.peek()), this._cursor.getSpan(location));\n        }\n    }\n    _attemptStr(chars) {\n        const len = chars.length;\n        if (this._cursor.charsLeft() < len) {\n            return false;\n        }\n        const initialPosition = this._cursor.clone();\n        for (let i = 0; i < len; i++) {\n            if (!this._attemptCharCode(chars.charCodeAt(i))) {\n                // If attempting to parse the string fails, we want to reset the parser\n                // to where it was before the attempt\n                this._cursor = initialPosition;\n                return false;\n            }\n        }\n        return true;\n    }\n    _attemptStrCaseInsensitive(chars) {\n        for (let i = 0; i < chars.length; i++) {\n            if (!this._attemptCharCodeCaseInsensitive(chars.charCodeAt(i))) {\n                return false;\n            }\n        }\n        return true;\n    }\n    _requireStr(chars) {\n        const location = this._cursor.clone();\n        if (!this._attemptStr(chars)) {\n            throw this._createError(_unexpectedCharacterErrorMsg(this._cursor.peek()), this._cursor.getSpan(location));\n        }\n    }\n    _attemptCharCodeUntilFn(predicate) {\n        while (!predicate(this._cursor.peek())) {\n            this._cursor.advance();\n        }\n    }\n    _requireCharCodeUntilFn(predicate, len) {\n        const start = this._cursor.clone();\n        this._attemptCharCodeUntilFn(predicate);\n        if (this._cursor.diff(start) < len) {\n            throw this._createError(_unexpectedCharacterErrorMsg(this._cursor.peek()), this._cursor.getSpan(start));\n        }\n    }\n    _attemptUntilChar(char) {\n        while (this._cursor.peek() !== char) {\n            this._cursor.advance();\n        }\n    }\n    _readChar(decodeEntities) {\n        if (decodeEntities && this._cursor.peek() === $AMPERSAND) {\n            return this._decodeEntity();\n        }\n        else {\n            // Don't rely upon reading directly from `_input` as the actual char value\n            // may have been generated from an escape sequence.\n            const char = String.fromCodePoint(this._cursor.peek());\n            this._cursor.advance();\n            return char;\n        }\n    }\n    _decodeEntity() {\n        const start = this._cursor.clone();\n        this._cursor.advance();\n        if (this._attemptCharCode($HASH)) {\n            const isHex = this._attemptCharCode($x) || this._attemptCharCode($X);\n            const codeStart = this._cursor.clone();\n            this._attemptCharCodeUntilFn(isDigitEntityEnd);\n            if (this._cursor.peek() != $SEMICOLON) {\n                // Advance cursor to include the peeked character in the string provided to the error\n                // message.\n                this._cursor.advance();\n                const entityType = isHex ? CharacterReferenceType.HEX : CharacterReferenceType.DEC;\n                throw this._createError(_unparsableEntityErrorMsg(entityType, this._cursor.getChars(start)), this._cursor.getSpan());\n            }\n            const strNum = this._cursor.getChars(codeStart);\n            this._cursor.advance();\n            try {\n                const charCode = parseInt(strNum, isHex ? 16 : 10);\n                return String.fromCharCode(charCode);\n            }\n            catch (_a) {\n                throw this._createError(_unknownEntityErrorMsg(this._cursor.getChars(start)), this._cursor.getSpan());\n            }\n        }\n        else {\n            const nameStart = this._cursor.clone();\n            this._attemptCharCodeUntilFn(isNamedEntityEnd);\n            if (this._cursor.peek() != $SEMICOLON) {\n                this._cursor = nameStart;\n                return '&';\n            }\n            const name = this._cursor.getChars(nameStart);\n            this._cursor.advance();\n            const char = NAMED_ENTITIES[name];\n            if (!char) {\n                throw this._createError(_unknownEntityErrorMsg(name), this._cursor.getSpan(start));\n            }\n            return char;\n        }\n    }\n    _consumeRawText(decodeEntities, endMarkerPredicate) {\n        this._beginToken(decodeEntities ? TokenType.ESCAPABLE_RAW_TEXT : TokenType.RAW_TEXT);\n        const parts = [];\n        while (true) {\n            const tagCloseStart = this._cursor.clone();\n            const foundEndMarker = endMarkerPredicate();\n            this._cursor = tagCloseStart;\n            if (foundEndMarker) {\n                break;\n            }\n            parts.push(this._readChar(decodeEntities));\n        }\n        return this._endToken([this._processCarriageReturns(parts.join(''))]);\n    }\n    _consumeComment(start) {\n        this._beginToken(TokenType.COMMENT_START, start);\n        this._requireCharCode($MINUS);\n        this._endToken([]);\n        this._consumeRawText(false, () => this._attemptStr('-->'));\n        this._beginToken(TokenType.COMMENT_END);\n        this._requireStr('-->');\n        this._endToken([]);\n    }\n    _consumeCdata(start) {\n        this._beginToken(TokenType.CDATA_START, start);\n        this._requireStr('CDATA[');\n        this._endToken([]);\n        this._consumeRawText(false, () => this._attemptStr(']]>'));\n        this._beginToken(TokenType.CDATA_END);\n        this._requireStr(']]>');\n        this._endToken([]);\n    }\n    _consumeDocType(start) {\n        this._beginToken(TokenType.DOC_TYPE, start);\n        const contentStart = this._cursor.clone();\n        this._attemptUntilChar($GT);\n        const content = this._cursor.getChars(contentStart);\n        this._cursor.advance();\n        this._endToken([content]);\n    }\n    _consumePrefixAndName() {\n        const nameOrPrefixStart = this._cursor.clone();\n        let prefix = '';\n        while (this._cursor.peek() !== $COLON && !isPrefixEnd(this._cursor.peek())) {\n            this._cursor.advance();\n        }\n        let nameStart;\n        if (this._cursor.peek() === $COLON) {\n            prefix = this._cursor.getChars(nameOrPrefixStart);\n            this._cursor.advance();\n            nameStart = this._cursor.clone();\n        }\n        else {\n            nameStart = nameOrPrefixStart;\n        }\n        this._requireCharCodeUntilFn(isNameEnd, prefix === '' ? 0 : 1);\n        const name = this._cursor.getChars(nameStart);\n        return [prefix, name];\n    }\n    _consumeTagOpen(start) {\n        let tagName;\n        let prefix;\n        let openTagToken;\n        let tokensBeforeTagOpen = this.tokens.length;\n        const innerStart = this._cursor.clone();\n        try {\n            if (!isAsciiLetter(this._cursor.peek())) {\n                throw this._createError(_unexpectedCharacterErrorMsg(this._cursor.peek()), this._cursor.getSpan(start));\n            }\n            openTagToken = this._consumeTagOpenStart(start);\n            prefix = openTagToken.parts[0];\n            tagName = openTagToken.parts[1];\n            this._attemptCharCodeUntilFn(isNotWhitespace);\n            while (this._cursor.peek() !== $SLASH && this._cursor.peek() !== $GT) {\n                this._consumeAttributeName();\n                this._attemptCharCodeUntilFn(isNotWhitespace);\n                if (this._attemptCharCode($EQ)) {\n                    this._attemptCharCodeUntilFn(isNotWhitespace);\n                    this._consumeAttributeValue();\n                }\n                this._attemptCharCodeUntilFn(isNotWhitespace);\n            }\n            this._consumeTagOpenEnd();\n        }\n        catch (e) {\n            if (e instanceof _ControlFlowError) {\n                // When the start tag is invalid (including invalid \"attributes\"), assume we want a \"<\"\n                this._cursor = innerStart;\n                if (openTagToken) {\n                    this.tokens.length = tokensBeforeTagOpen;\n                }\n                // Back to back text tokens are merged at the end\n                this._beginToken(TokenType.TEXT, start);\n                this._endToken(['<']);\n                return;\n            }\n            throw e;\n        }\n        const contentTokenType = this._getTagDefinition(tagName).contentType;\n        if (contentTokenType === TagContentType.RAW_TEXT) {\n            this._consumeRawTextWithTagClose(prefix, tagName, false);\n        }\n        else if (contentTokenType === TagContentType.ESCAPABLE_RAW_TEXT) {\n            this._consumeRawTextWithTagClose(prefix, tagName, true);\n        }\n    }\n    _consumeRawTextWithTagClose(prefix, tagName, decodeEntities) {\n        const textToken = this._consumeRawText(decodeEntities, () => {\n            if (!this._attemptCharCode($LT))\n                return false;\n            if (!this._attemptCharCode($SLASH))\n                return false;\n            this._attemptCharCodeUntilFn(isNotWhitespace);\n            if (!this._attemptStrCaseInsensitive(tagName))\n                return false;\n            this._attemptCharCodeUntilFn(isNotWhitespace);\n            return this._attemptCharCode($GT);\n        });\n        this._beginToken(TokenType.TAG_CLOSE);\n        this._requireCharCodeUntilFn(code => code === $GT, 3);\n        this._cursor.advance(); // Consume the `>`\n        this._endToken([prefix, tagName]);\n    }\n    _consumeTagOpenStart(start) {\n        this._beginToken(TokenType.TAG_OPEN_START, start);\n        const parts = this._consumePrefixAndName();\n        return this._endToken(parts);\n    }\n    _consumeAttributeName() {\n        const attrNameStart = this._cursor.peek();\n        if (attrNameStart === $SQ || attrNameStart === $DQ) {\n            throw this._createError(_unexpectedCharacterErrorMsg(attrNameStart), this._cursor.getSpan());\n        }\n        this._beginToken(TokenType.ATTR_NAME);\n        const prefixAndName = this._consumePrefixAndName();\n        this._endToken(prefixAndName);\n    }\n    _consumeAttributeValue() {\n        let value;\n        if (this._cursor.peek() === $SQ || this._cursor.peek() === $DQ) {\n            this._beginToken(TokenType.ATTR_QUOTE);\n            const quoteChar = this._cursor.peek();\n            this._cursor.advance();\n            this._endToken([String.fromCodePoint(quoteChar)]);\n            this._beginToken(TokenType.ATTR_VALUE);\n            const parts = [];\n            while (this._cursor.peek() !== quoteChar) {\n                parts.push(this._readChar(true));\n            }\n            value = parts.join('');\n            this._endToken([this._processCarriageReturns(value)]);\n            this._beginToken(TokenType.ATTR_QUOTE);\n            this._cursor.advance();\n            this._endToken([String.fromCodePoint(quoteChar)]);\n        }\n        else {\n            this._beginToken(TokenType.ATTR_VALUE);\n            const valueStart = this._cursor.clone();\n            this._requireCharCodeUntilFn(isNameEnd, 1);\n            value = this._cursor.getChars(valueStart);\n            this._endToken([this._processCarriageReturns(value)]);\n        }\n    }\n    _consumeTagOpenEnd() {\n        const tokenType = this._attemptCharCode($SLASH) ? TokenType.TAG_OPEN_END_VOID : TokenType.TAG_OPEN_END;\n        this._beginToken(tokenType);\n        this._requireCharCode($GT);\n        this._endToken([]);\n    }\n    _consumeTagClose(start) {\n        this._beginToken(TokenType.TAG_CLOSE, start);\n        this._attemptCharCodeUntilFn(isNotWhitespace);\n        const prefixAndName = this._consumePrefixAndName();\n        this._attemptCharCodeUntilFn(isNotWhitespace);\n        this._requireCharCode($GT);\n        this._endToken(prefixAndName);\n    }\n    _consumeExpansionFormStart() {\n        this._beginToken(TokenType.EXPANSION_FORM_START);\n        this._requireCharCode($LBRACE);\n        this._endToken([]);\n        this._expansionCaseStack.push(TokenType.EXPANSION_FORM_START);\n        this._beginToken(TokenType.RAW_TEXT);\n        const condition = this._readUntil($COMMA);\n        const normalizedCondition = this._processCarriageReturns(condition);\n        if (this._escapedString || this._i18nNormalizeLineEndingsInICUs) {\n            // Either the template is inline or,\n            // we explicitly want to normalize line endings for this text.\n            this._endToken([normalizedCondition]);\n        }\n        else {\n            // The expression is in an external template and, for backward compatibility,\n            // we are not normalizing line endings.\n            const conditionToken = this._endToken([condition]);\n            if (normalizedCondition !== condition) {\n                this.nonNormalizedIcuExpressions.push(conditionToken);\n            }\n        }\n        this._requireCharCode($COMMA);\n        this._attemptCharCodeUntilFn(isNotWhitespace);\n        this._beginToken(TokenType.RAW_TEXT);\n        const type = this._readUntil($COMMA);\n        this._endToken([type]);\n        this._requireCharCode($COMMA);\n        this._attemptCharCodeUntilFn(isNotWhitespace);\n    }\n    _consumeExpansionCaseStart() {\n        this._beginToken(TokenType.EXPANSION_CASE_VALUE);\n        const value = this._readUntil($LBRACE).trim();\n        this._endToken([value]);\n        this._attemptCharCodeUntilFn(isNotWhitespace);\n        this._beginToken(TokenType.EXPANSION_CASE_EXP_START);\n        this._requireCharCode($LBRACE);\n        this._endToken([]);\n        this._attemptCharCodeUntilFn(isNotWhitespace);\n        this._expansionCaseStack.push(TokenType.EXPANSION_CASE_EXP_START);\n    }\n    _consumeExpansionCaseEnd() {\n        this._beginToken(TokenType.EXPANSION_CASE_EXP_END);\n        this._requireCharCode($RBRACE);\n        this._endToken([]);\n        this._attemptCharCodeUntilFn(isNotWhitespace);\n        this._expansionCaseStack.pop();\n    }\n    _consumeExpansionFormEnd() {\n        this._beginToken(TokenType.EXPANSION_FORM_END);\n        this._requireCharCode($RBRACE);\n        this._endToken([]);\n        this._expansionCaseStack.pop();\n    }\n    _consumeText() {\n        const start = this._cursor.clone();\n        this._beginToken(TokenType.TEXT, start);\n        const parts = [];\n        do {\n            if (this._interpolationConfig && this._attemptStr(this._interpolationConfig.start)) {\n                parts.push(this._interpolationConfig.start);\n                this._inInterpolation = true;\n            }\n            else if (this._interpolationConfig && this._inInterpolation &&\n                this._attemptStr(this._interpolationConfig.end)) {\n                parts.push(this._interpolationConfig.end);\n                this._inInterpolation = false;\n            }\n            else {\n                parts.push(this._readChar(true));\n            }\n        } while (!this._isTextEnd());\n        this._endToken([this._processCarriageReturns(parts.join(''))]);\n    }\n    _isTextEnd() {\n        if (this._cursor.peek() === $LT || this._cursor.peek() === $EOF) {\n            return true;\n        }\n        if (this._tokenizeIcu && !this._inInterpolation) {\n            if (this.isExpansionFormStart()) {\n                // start of an expansion form\n                return true;\n            }\n            if (this._cursor.peek() === $RBRACE && this._isInExpansionCase()) {\n                // end of and expansion case\n                return true;\n            }\n        }\n        return false;\n    }\n    _readUntil(char) {\n        const start = this._cursor.clone();\n        this._attemptUntilChar(char);\n        return this._cursor.getChars(start);\n    }\n    _isInExpansionCase() {\n        return this._expansionCaseStack.length > 0 &&\n            this._expansionCaseStack[this._expansionCaseStack.length - 1] ===\n                TokenType.EXPANSION_CASE_EXP_START;\n    }\n    _isInExpansionForm() {\n        return this._expansionCaseStack.length > 0 &&\n            this._expansionCaseStack[this._expansionCaseStack.length - 1] ===\n                TokenType.EXPANSION_FORM_START;\n    }\n    isExpansionFormStart() {\n        if (this._cursor.peek() !== $LBRACE) {\n            return false;\n        }\n        if (this._interpolationConfig) {\n            const start = this._cursor.clone();\n            const isInterpolation = this._attemptStr(this._interpolationConfig.start);\n            this._cursor = start;\n            return !isInterpolation;\n        }\n        return true;\n    }\n}\nfunction isNotWhitespace(code) {\n    return !isWhitespace(code) || code === $EOF;\n}\nfunction isNameEnd(code) {\n    return isWhitespace(code) || code === $GT || code === $SLASH ||\n        code === $SQ || code === $DQ || code === $EQ;\n}\nfunction isPrefixEnd(code) {\n    return (code < $a || $z < code) && (code < $A || $Z < code) &&\n        (code < $0 || code > $9);\n}\nfunction isDigitEntityEnd(code) {\n    return code == $SEMICOLON || code == $EOF || !isAsciiHexDigit(code);\n}\nfunction isNamedEntityEnd(code) {\n    return code == $SEMICOLON || code == $EOF || !isAsciiLetter(code);\n}\nfunction isExpansionCaseStart(peek) {\n    return peek !== $RBRACE;\n}\nfunction compareCharCodeCaseInsensitive(code1, code2) {\n    return toUpperCaseCharCode(code1) == toUpperCaseCharCode(code2);\n}\nfunction toUpperCaseCharCode(code) {\n    return code >= $a && code <= $z ? code - $a + $A : code;\n}\nfunction mergeTextTokens(srcTokens) {\n    const dstTokens = [];\n    let lastDstToken = undefined;\n    for (let i = 0; i < srcTokens.length; i++) {\n        const token = srcTokens[i];\n        if (lastDstToken && lastDstToken.type == TokenType.TEXT && token.type == TokenType.TEXT) {\n            lastDstToken.parts[0] += token.parts[0];\n            lastDstToken.sourceSpan.end = token.sourceSpan.end;\n        }\n        else {\n            lastDstToken = token;\n            dstTokens.push(lastDstToken);\n        }\n    }\n    return dstTokens;\n}\nclass PlainCharacterCursor {\n    constructor(fileOrCursor, range) {\n        if (fileOrCursor instanceof PlainCharacterCursor) {\n            this.file = fileOrCursor.file;\n            this.input = fileOrCursor.input;\n            this.end = fileOrCursor.end;\n            const state = fileOrCursor.state;\n            // Note: avoid using `{...fileOrCursor.state}` here as that has a severe performance penalty.\n            // In ES5 bundles the object spread operator is translated into the `__assign` helper, which\n            // is not optimized by VMs as efficiently as a raw object literal. Since this constructor is\n            // called in tight loops, this difference matters.\n            this.state = {\n                peek: state.peek,\n                offset: state.offset,\n                line: state.line,\n                column: state.column,\n            };\n        }\n        else {\n            if (!range) {\n                throw new Error('Programming error: the range argument must be provided with a file argument.');\n            }\n            this.file = fileOrCursor;\n            this.input = fileOrCursor.content;\n            this.end = range.endPos;\n            this.state = {\n                peek: -1,\n                offset: range.startPos,\n                line: range.startLine,\n                column: range.startCol,\n            };\n        }\n    }\n    clone() {\n        return new PlainCharacterCursor(this);\n    }\n    peek() {\n        return this.state.peek;\n    }\n    charsLeft() {\n        return this.end - this.state.offset;\n    }\n    diff(other) {\n        return this.state.offset - other.state.offset;\n    }\n    advance() {\n        this.advanceState(this.state);\n    }\n    init() {\n        this.updatePeek(this.state);\n    }\n    getSpan(start, leadingTriviaCodePoints) {\n        start = start || this;\n        let cloned = false;\n        if (leadingTriviaCodePoints) {\n            while (this.diff(start) > 0 && leadingTriviaCodePoints.indexOf(start.peek()) !== -1) {\n                if (!cloned) {\n                    start = start.clone();\n                    cloned = true;\n                }\n                start.advance();\n            }\n        }\n        return new ParseSourceSpan(new ParseLocation(start.file, start.state.offset, start.state.line, start.state.column), new ParseLocation(this.file, this.state.offset, this.state.line, this.state.column));\n    }\n    getChars(start) {\n        return this.input.substring(start.state.offset, this.state.offset);\n    }\n    charAt(pos) {\n        return this.input.charCodeAt(pos);\n    }\n    advanceState(state) {\n        if (state.offset >= this.end) {\n            this.state = state;\n            throw new CursorError('Unexpected character \"EOF\"', this);\n        }\n        const currentChar = this.charAt(state.offset);\n        if (currentChar === $LF) {\n            state.line++;\n            state.column = 0;\n        }\n        else if (!isNewLine(currentChar)) {\n            state.column++;\n        }\n        state.offset++;\n        this.updatePeek(state);\n    }\n    updatePeek(state) {\n        state.peek = state.offset >= this.end ? $EOF : this.charAt(state.offset);\n    }\n}\nclass EscapedCharacterCursor extends PlainCharacterCursor {\n    constructor(fileOrCursor, range) {\n        if (fileOrCursor instanceof EscapedCharacterCursor) {\n            super(fileOrCursor);\n            this.internalState = Object.assign({}, fileOrCursor.internalState);\n        }\n        else {\n            super(fileOrCursor, range);\n            this.internalState = this.state;\n        }\n    }\n    advance() {\n        this.state = this.internalState;\n        super.advance();\n        this.processEscapeSequence();\n    }\n    init() {\n        super.init();\n        this.processEscapeSequence();\n    }\n    clone() {\n        return new EscapedCharacterCursor(this);\n    }\n    getChars(start) {\n        const cursor = start.clone();\n        let chars = '';\n        while (cursor.internalState.offset < this.internalState.offset) {\n            chars += String.fromCodePoint(cursor.peek());\n            cursor.advance();\n        }\n        return chars;\n    }\n    /**\n     * Process the escape sequence that starts at the current position in the text.\n     *\n     * This method is called to ensure that `peek` has the unescaped value of escape sequences.\n     */\n    processEscapeSequence() {\n        const peek = () => this.internalState.peek;\n        if (peek() === $BACKSLASH) {\n            // We have hit an escape sequence so we need the internal state to become independent\n            // of the external state.\n            this.internalState = Object.assign({}, this.state);\n            // Move past the backslash\n            this.advanceState(this.internalState);\n            // First check for standard control char sequences\n            if (peek() === $n) {\n                this.state.peek = $LF;\n            }\n            else if (peek() === $r) {\n                this.state.peek = $CR;\n            }\n            else if (peek() === $v) {\n                this.state.peek = $VTAB;\n            }\n            else if (peek() === $t) {\n                this.state.peek = $TAB;\n            }\n            else if (peek() === $b) {\n                this.state.peek = $BSPACE;\n            }\n            else if (peek() === $f) {\n                this.state.peek = $FF;\n            }\n            // Now consider more complex sequences\n            else if (peek() === $u) {\n                // Unicode code-point sequence\n                this.advanceState(this.internalState); // advance past the `u` char\n                if (peek() === $LBRACE) {\n                    // Variable length Unicode, e.g. `\\x{123}`\n                    this.advanceState(this.internalState); // advance past the `{` char\n                    // Advance past the variable number of hex digits until we hit a `}` char\n                    const digitStart = this.clone();\n                    let length = 0;\n                    while (peek() !== $RBRACE) {\n                        this.advanceState(this.internalState);\n                        length++;\n                    }\n                    this.state.peek = this.decodeHexDigits(digitStart, length);\n                }\n                else {\n                    // Fixed length Unicode, e.g. `\\u1234`\n                    const digitStart = this.clone();\n                    this.advanceState(this.internalState);\n                    this.advanceState(this.internalState);\n                    this.advanceState(this.internalState);\n                    this.state.peek = this.decodeHexDigits(digitStart, 4);\n                }\n            }\n            else if (peek() === $x) {\n                // Hex char code, e.g. `\\x2F`\n                this.advanceState(this.internalState); // advance past the `x` char\n                const digitStart = this.clone();\n                this.advanceState(this.internalState);\n                this.state.peek = this.decodeHexDigits(digitStart, 2);\n            }\n            else if (isOctalDigit(peek())) {\n                // Octal char code, e.g. `\\012`,\n                let octal = '';\n                let length = 0;\n                let previous = this.clone();\n                while (isOctalDigit(peek()) && length < 3) {\n                    previous = this.clone();\n                    octal += String.fromCodePoint(peek());\n                    this.advanceState(this.internalState);\n                    length++;\n                }\n                this.state.peek = parseInt(octal, 8);\n                // Backup one char\n                this.internalState = previous.internalState;\n            }\n            else if (isNewLine(this.internalState.peek)) {\n                // Line continuation `\\` followed by a new line\n                this.advanceState(this.internalState); // advance over the newline\n                this.state = this.internalState;\n            }\n            else {\n                // If none of the `if` blocks were executed then we just have an escaped normal character.\n                // In that case we just, effectively, skip the backslash from the character.\n                this.state.peek = this.internalState.peek;\n            }\n        }\n    }\n    decodeHexDigits(start, length) {\n        const hex = this.input.substr(start.internalState.offset, length);\n        const charCode = parseInt(hex, 16);\n        if (!isNaN(charCode)) {\n            return charCode;\n        }\n        else {\n            start.state = start.internalState;\n            throw new CursorError('Invalid hexadecimal escape sequence', start);\n        }\n    }\n}\nclass CursorError {\n    constructor(msg, cursor) {\n        this.msg = msg;\n        this.cursor = cursor;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass TreeError extends ParseError {\n    constructor(elementName, span, msg) {\n        super(span, msg);\n        this.elementName = elementName;\n    }\n    static create(elementName, span, msg) {\n        return new TreeError(elementName, span, msg);\n    }\n}\nclass ParseTreeResult {\n    constructor(rootNodes, errors) {\n        this.rootNodes = rootNodes;\n        this.errors = errors;\n    }\n}\nclass Parser {\n    constructor(getTagDefinition) {\n        this.getTagDefinition = getTagDefinition;\n    }\n    parse(source, url, options) {\n        const tokenizeResult = tokenize(source, url, this.getTagDefinition, options);\n        const parser = new _TreeBuilder(tokenizeResult.tokens, this.getTagDefinition);\n        parser.build();\n        return new ParseTreeResult(parser.rootNodes, tokenizeResult.errors.concat(parser.errors));\n    }\n}\nclass _TreeBuilder {\n    constructor(tokens, getTagDefinition) {\n        this.tokens = tokens;\n        this.getTagDefinition = getTagDefinition;\n        this._index = -1;\n        this._elementStack = [];\n        this.rootNodes = [];\n        this.errors = [];\n        this._advance();\n    }\n    build() {\n        while (this._peek.type !== TokenType.EOF) {\n            if (this._peek.type === TokenType.TAG_OPEN_START) {\n                this._consumeStartTag(this._advance());\n            }\n            else if (this._peek.type === TokenType.TAG_CLOSE) {\n                this._consumeEndTag(this._advance());\n            }\n            else if (this._peek.type === TokenType.CDATA_START) {\n                this._closeVoidElement();\n                this._consumeCdata(this._advance());\n            }\n            else if (this._peek.type === TokenType.COMMENT_START) {\n                this._closeVoidElement();\n                this._consumeComment(this._advance());\n            }\n            else if (this._peek.type === TokenType.TEXT || this._peek.type === TokenType.RAW_TEXT ||\n                this._peek.type === TokenType.ESCAPABLE_RAW_TEXT) {\n                this._closeVoidElement();\n                this._consumeText(this._advance());\n            }\n            else if (this._peek.type === TokenType.EXPANSION_FORM_START) {\n                this._consumeExpansion(this._advance());\n            }\n            else {\n                // Skip all other tokens...\n                this._advance();\n            }\n        }\n    }\n    _advance() {\n        const prev = this._peek;\n        if (this._index < this.tokens.length - 1) {\n            // Note: there is always an EOF token at the end\n            this._index++;\n        }\n        this._peek = this.tokens[this._index];\n        return prev;\n    }\n    _advanceIf(type) {\n        if (this._peek.type === type) {\n            return this._advance();\n        }\n        return null;\n    }\n    _consumeCdata(_startToken) {\n        this._consumeText(this._advance());\n        this._advanceIf(TokenType.CDATA_END);\n    }\n    _consumeComment(token) {\n        const text = this._advanceIf(TokenType.RAW_TEXT);\n        this._advanceIf(TokenType.COMMENT_END);\n        const value = text != null ? text.parts[0].trim() : null;\n        this._addToParent(new Comment(value, token.sourceSpan));\n    }\n    _consumeExpansion(token) {\n        const switchValue = this._advance();\n        const type = this._advance();\n        const cases = [];\n        // read =\n        while (this._peek.type === TokenType.EXPANSION_CASE_VALUE) {\n            const expCase = this._parseExpansionCase();\n            if (!expCase)\n                return; // error\n            cases.push(expCase);\n        }\n        // read the final }\n        if (this._peek.type !== TokenType.EXPANSION_FORM_END) {\n            this.errors.push(TreeError.create(null, this._peek.sourceSpan, `Invalid ICU message. Missing '}'.`));\n            return;\n        }\n        const sourceSpan = new ParseSourceSpan(token.sourceSpan.start, this._peek.sourceSpan.end);\n        this._addToParent(new Expansion(switchValue.parts[0], type.parts[0], cases, sourceSpan, switchValue.sourceSpan));\n        this._advance();\n    }\n    _parseExpansionCase() {\n        const value = this._advance();\n        // read {\n        if (this._peek.type !== TokenType.EXPANSION_CASE_EXP_START) {\n            this.errors.push(TreeError.create(null, this._peek.sourceSpan, `Invalid ICU message. Missing '{'.`));\n            return null;\n        }\n        // read until }\n        const start = this._advance();\n        const exp = this._collectExpansionExpTokens(start);\n        if (!exp)\n            return null;\n        const end = this._advance();\n        exp.push(new Token(TokenType.EOF, [], end.sourceSpan));\n        // parse everything in between { and }\n        const expansionCaseParser = new _TreeBuilder(exp, this.getTagDefinition);\n        expansionCaseParser.build();\n        if (expansionCaseParser.errors.length > 0) {\n            this.errors = this.errors.concat(expansionCaseParser.errors);\n            return null;\n        }\n        const sourceSpan = new ParseSourceSpan(value.sourceSpan.start, end.sourceSpan.end);\n        const expSourceSpan = new ParseSourceSpan(start.sourceSpan.start, end.sourceSpan.end);\n        return new ExpansionCase(value.parts[0], expansionCaseParser.rootNodes, sourceSpan, value.sourceSpan, expSourceSpan);\n    }\n    _collectExpansionExpTokens(start) {\n        const exp = [];\n        const expansionFormStack = [TokenType.EXPANSION_CASE_EXP_START];\n        while (true) {\n            if (this._peek.type === TokenType.EXPANSION_FORM_START ||\n                this._peek.type === TokenType.EXPANSION_CASE_EXP_START) {\n                expansionFormStack.push(this._peek.type);\n            }\n            if (this._peek.type === TokenType.EXPANSION_CASE_EXP_END) {\n                if (lastOnStack(expansionFormStack, TokenType.EXPANSION_CASE_EXP_START)) {\n                    expansionFormStack.pop();\n                    if (expansionFormStack.length == 0)\n                        return exp;\n                }\n                else {\n                    this.errors.push(TreeError.create(null, start.sourceSpan, `Invalid ICU message. Missing '}'.`));\n                    return null;\n                }\n            }\n            if (this._peek.type === TokenType.EXPANSION_FORM_END) {\n                if (lastOnStack(expansionFormStack, TokenType.EXPANSION_FORM_START)) {\n                    expansionFormStack.pop();\n                }\n                else {\n                    this.errors.push(TreeError.create(null, start.sourceSpan, `Invalid ICU message. Missing '}'.`));\n                    return null;\n                }\n            }\n            if (this._peek.type === TokenType.EOF) {\n                this.errors.push(TreeError.create(null, start.sourceSpan, `Invalid ICU message. Missing '}'.`));\n                return null;\n            }\n            exp.push(this._advance());\n        }\n    }\n    _consumeText(token) {\n        let text = token.parts[0];\n        if (text.length > 0 && text[0] == '\\n') {\n            const parent = this._getParentElement();\n            if (parent != null && parent.children.length == 0 &&\n                this.getTagDefinition(parent.name).ignoreFirstLf) {\n                text = text.substring(1);\n            }\n        }\n        if (text.length > 0) {\n            this._addToParent(new Text$3(text, token.sourceSpan));\n        }\n    }\n    _closeVoidElement() {\n        const el = this._getParentElement();\n        if (el && this.getTagDefinition(el.name).isVoid) {\n            this._elementStack.pop();\n        }\n    }\n    _consumeStartTag(startTagToken) {\n        const prefix = startTagToken.parts[0];\n        const name = startTagToken.parts[1];\n        const attrs = [];\n        while (this._peek.type === TokenType.ATTR_NAME) {\n            attrs.push(this._consumeAttr(this._advance()));\n        }\n        const fullName = this._getElementFullName(prefix, name, this._getParentElement());\n        let selfClosing = false;\n        // Note: There could have been a tokenizer error\n        // so that we don't get a token for the end tag...\n        if (this._peek.type === TokenType.TAG_OPEN_END_VOID) {\n            this._advance();\n            selfClosing = true;\n            const tagDef = this.getTagDefinition(fullName);\n            if (!(tagDef.canSelfClose || getNsPrefix(fullName) !== null || tagDef.isVoid)) {\n                this.errors.push(TreeError.create(fullName, startTagToken.sourceSpan, `Only void and foreign elements can be self closed \"${startTagToken.parts[1]}\"`));\n            }\n        }\n        else if (this._peek.type === TokenType.TAG_OPEN_END) {\n            this._advance();\n            selfClosing = false;\n        }\n        const end = this._peek.sourceSpan.start;\n        const span = new ParseSourceSpan(startTagToken.sourceSpan.start, end);\n        const el = new Element$1(fullName, attrs, [], span, span, undefined);\n        this._pushElement(el);\n        if (selfClosing) {\n            // Elements that are self-closed have their `endSourceSpan` set to the full span, as the\n            // element start tag also represents the end tag.\n            this._popElement(fullName, span);\n        }\n    }\n    _pushElement(el) {\n        const parentEl = this._getParentElement();\n        if (parentEl && this.getTagDefinition(parentEl.name).isClosedByChild(el.name)) {\n            this._elementStack.pop();\n        }\n        this._addToParent(el);\n        this._elementStack.push(el);\n    }\n    _consumeEndTag(endTagToken) {\n        const fullName = this._getElementFullName(endTagToken.parts[0], endTagToken.parts[1], this._getParentElement());\n        if (this.getTagDefinition(fullName).isVoid) {\n            this.errors.push(TreeError.create(fullName, endTagToken.sourceSpan, `Void elements do not have end tags \"${endTagToken.parts[1]}\"`));\n        }\n        else if (!this._popElement(fullName, endTagToken.sourceSpan)) {\n            const errMsg = `Unexpected closing tag \"${fullName}\". It may happen when the tag has already been closed by another tag. For more info see https://www.w3.org/TR/html5/syntax.html#closing-elements-that-have-implied-end-tags`;\n            this.errors.push(TreeError.create(fullName, endTagToken.sourceSpan, errMsg));\n        }\n    }\n    _popElement(fullName, endSourceSpan) {\n        for (let stackIndex = this._elementStack.length - 1; stackIndex >= 0; stackIndex--) {\n            const el = this._elementStack[stackIndex];\n            if (el.name == fullName) {\n                // Record the parse span with the element that is being closed. Any elements that are\n                // removed from the element stack at this point are closed implicitly, so they won't get\n                // an end source span (as there is no explicit closing element).\n                el.endSourceSpan = endSourceSpan;\n                this._elementStack.splice(stackIndex, this._elementStack.length - stackIndex);\n                return true;\n            }\n            if (!this.getTagDefinition(el.name).closedByParent) {\n                return false;\n            }\n        }\n        return false;\n    }\n    _consumeAttr(attrName) {\n        const fullName = mergeNsAndName(attrName.parts[0], attrName.parts[1]);\n        let end = attrName.sourceSpan.end;\n        let value = '';\n        let valueSpan = undefined;\n        if (this._peek.type === TokenType.ATTR_QUOTE) {\n            this._advance();\n        }\n        if (this._peek.type === TokenType.ATTR_VALUE) {\n            const valueToken = this._advance();\n            value = valueToken.parts[0];\n            end = valueToken.sourceSpan.end;\n            valueSpan = valueToken.sourceSpan;\n        }\n        if (this._peek.type === TokenType.ATTR_QUOTE) {\n            const quoteToken = this._advance();\n            end = quoteToken.sourceSpan.end;\n        }\n        return new Attribute(fullName, value, new ParseSourceSpan(attrName.sourceSpan.start, end), valueSpan);\n    }\n    _getParentElement() {\n        return this._elementStack.length > 0 ? this._elementStack[this._elementStack.length - 1] : null;\n    }\n    _addToParent(node) {\n        const parent = this._getParentElement();\n        if (parent != null) {\n            parent.children.push(node);\n        }\n        else {\n            this.rootNodes.push(node);\n        }\n    }\n    _getElementFullName(prefix, localName, parentElement) {\n        if (prefix === '') {\n            prefix = this.getTagDefinition(localName).implicitNamespacePrefix || '';\n            if (prefix === '' && parentElement != null) {\n                const parentTagName = splitNsName(parentElement.name)[1];\n                const parentTagDefinition = this.getTagDefinition(parentTagName);\n                if (!parentTagDefinition.preventNamespaceInheritance) {\n                    prefix = getNsPrefix(parentElement.name);\n                }\n            }\n        }\n        return mergeNsAndName(prefix, localName);\n    }\n}\nfunction lastOnStack(stack, element) {\n    return stack.length > 0 && stack[stack.length - 1] === element;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass HtmlParser extends Parser {\n    constructor() {\n        super(getHtmlTagDefinition);\n    }\n    parse(source, url, options) {\n        return super.parse(source, url, options);\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst PRESERVE_WS_ATTR_NAME = 'ngPreserveWhitespaces';\nconst SKIP_WS_TRIM_TAGS = new Set(['pre', 'template', 'textarea', 'script', 'style']);\n// Equivalent to \\s with \\u00a0 (non-breaking space) excluded.\n// Based on https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp\nconst WS_CHARS = ' \\f\\n\\r\\t\\v\\u1680\\u180e\\u2000-\\u200a\\u2028\\u2029\\u202f\\u205f\\u3000\\ufeff';\nconst NO_WS_REGEXP = new RegExp(`[^${WS_CHARS}]`);\nconst WS_REPLACE_REGEXP = new RegExp(`[${WS_CHARS}]{2,}`, 'g');\nfunction hasPreserveWhitespacesAttr(attrs) {\n    return attrs.some((attr) => attr.name === PRESERVE_WS_ATTR_NAME);\n}\n/**\n * Angular Dart introduced &ngsp; as a placeholder for non-removable space, see:\n * https://github.com/dart-lang/angular/blob/0bb611387d29d65b5af7f9d2515ab571fd3fbee4/_tests/test/compiler/preserve_whitespace_test.dart#L25-L32\n * In Angular Dart &ngsp; is converted to the 0xE500 PUA (Private Use Areas) unicode character\n * and later on replaced by a space. We are re-implementing the same idea here.\n */\nfunction replaceNgsp(value) {\n    // lexer is replacing the &ngsp; pseudo-entity with NGSP_UNICODE\n    return value.replace(new RegExp(NGSP_UNICODE, 'g'), ' ');\n}\n/**\n * This visitor can walk HTML parse tree and remove / trim text nodes using the following rules:\n * - consider spaces, tabs and new lines as whitespace characters;\n * - drop text nodes consisting of whitespace characters only;\n * - for all other text nodes replace consecutive whitespace characters with one space;\n * - convert &ngsp; pseudo-entity to a single space;\n *\n * Removal and trimming of whitespaces have positive performance impact (less code to generate\n * while compiling templates, faster view creation). At the same time it can be \"destructive\"\n * in some cases (whitespaces can influence layout). Because of the potential of breaking layout\n * this visitor is not activated by default in Angular 5 and people need to explicitly opt-in for\n * whitespace removal. The default option for whitespace removal will be revisited in Angular 6\n * and might be changed to \"on\" by default.\n */\nclass WhitespaceVisitor {\n    visitElement(element, context) {\n        if (SKIP_WS_TRIM_TAGS.has(element.name) || hasPreserveWhitespacesAttr(element.attrs)) {\n            // don't descent into elements where we need to preserve whitespaces\n            // but still visit all attributes to eliminate one used as a market to preserve WS\n            return new Element$1(element.name, visitAll$1(this, element.attrs), element.children, element.sourceSpan, element.startSourceSpan, element.endSourceSpan, element.i18n);\n        }\n        return new Element$1(element.name, element.attrs, visitAllWithSiblings(this, element.children), element.sourceSpan, element.startSourceSpan, element.endSourceSpan, element.i18n);\n    }\n    visitAttribute(attribute, context) {\n        return attribute.name !== PRESERVE_WS_ATTR_NAME ? attribute : null;\n    }\n    visitText(text, context) {\n        const isNotBlank = text.value.match(NO_WS_REGEXP);\n        const hasExpansionSibling = context &&\n            (context.prev instanceof Expansion || context.next instanceof Expansion);\n        if (isNotBlank || hasExpansionSibling) {\n            return new Text$3(replaceNgsp(text.value).replace(WS_REPLACE_REGEXP, ' '), text.sourceSpan, text.i18n);\n        }\n        return null;\n    }\n    visitComment(comment, context) {\n        return comment;\n    }\n    visitExpansion(expansion, context) {\n        return expansion;\n    }\n    visitExpansionCase(expansionCase, context) {\n        return expansionCase;\n    }\n}\nfunction removeWhitespaces(htmlAstWithErrors) {\n    return new ParseTreeResult(visitAll$1(new WhitespaceVisitor(), htmlAstWithErrors.rootNodes), htmlAstWithErrors.errors);\n}\nfunction visitAllWithSiblings(visitor, nodes) {\n    const result = [];\n    nodes.forEach((ast, i) => {\n        const context = { prev: nodes[i - 1], next: nodes[i + 1] };\n        const astResult = ast.visit(visitor, context);\n        if (astResult) {\n            result.push(astResult);\n        }\n    });\n    return result;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// http://cldr.unicode.org/index/cldr-spec/plural-rules\nconst PLURAL_CASES = ['zero', 'one', 'two', 'few', 'many', 'other'];\n/**\n * Expands special forms into elements.\n *\n * For example,\n *\n * ```\n * { messages.length, plural,\n *   =0 {zero}\n *   =1 {one}\n *   other {more than one}\n * }\n * ```\n *\n * will be expanded into\n *\n * ```\n * <ng-container [ngPlural]=\"messages.length\">\n *   <ng-template ngPluralCase=\"=0\">zero</ng-template>\n *   <ng-template ngPluralCase=\"=1\">one</ng-template>\n *   <ng-template ngPluralCase=\"other\">more than one</ng-template>\n * </ng-container>\n * ```\n */\nfunction expandNodes(nodes) {\n    const expander = new _Expander();\n    return new ExpansionResult(visitAll$1(expander, nodes), expander.isExpanded, expander.errors);\n}\nclass ExpansionResult {\n    constructor(nodes, expanded, errors) {\n        this.nodes = nodes;\n        this.expanded = expanded;\n        this.errors = errors;\n    }\n}\nclass ExpansionError extends ParseError {\n    constructor(span, errorMsg) {\n        super(span, errorMsg);\n    }\n}\n/**\n * Expand expansion forms (plural, select) to directives\n *\n * @internal\n */\nclass _Expander {\n    constructor() {\n        this.isExpanded = false;\n        this.errors = [];\n    }\n    visitElement(element, context) {\n        return new Element$1(element.name, element.attrs, visitAll$1(this, element.children), element.sourceSpan, element.startSourceSpan, element.endSourceSpan);\n    }\n    visitAttribute(attribute, context) {\n        return attribute;\n    }\n    visitText(text, context) {\n        return text;\n    }\n    visitComment(comment, context) {\n        return comment;\n    }\n    visitExpansion(icu, context) {\n        this.isExpanded = true;\n        return icu.type == 'plural' ? _expandPluralForm(icu, this.errors) :\n            _expandDefaultForm(icu, this.errors);\n    }\n    visitExpansionCase(icuCase, context) {\n        throw new Error('Should not be reached');\n    }\n}\n// Plural forms are expanded to `NgPlural` and `NgPluralCase`s\nfunction _expandPluralForm(ast, errors) {\n    const children = ast.cases.map(c => {\n        if (PLURAL_CASES.indexOf(c.value) == -1 && !c.value.match(/^=\\d+$/)) {\n            errors.push(new ExpansionError(c.valueSourceSpan, `Plural cases should be \"=<number>\" or one of ${PLURAL_CASES.join(', ')}`));\n        }\n        const expansionResult = expandNodes(c.expression);\n        errors.push(...expansionResult.errors);\n        return new Element$1(`ng-template`, [new Attribute('ngPluralCase', `${c.value}`, c.valueSourceSpan)], expansionResult.nodes, c.sourceSpan, c.sourceSpan, c.sourceSpan);\n    });\n    const switchAttr = new Attribute('[ngPlural]', ast.switchValue, ast.switchValueSourceSpan);\n    return new Element$1('ng-container', [switchAttr], children, ast.sourceSpan, ast.sourceSpan, ast.sourceSpan);\n}\n// ICU messages (excluding plural form) are expanded to `NgSwitch`  and `NgSwitchCase`s\nfunction _expandDefaultForm(ast, errors) {\n    const children = ast.cases.map(c => {\n        const expansionResult = expandNodes(c.expression);\n        errors.push(...expansionResult.errors);\n        if (c.value === 'other') {\n            // other is the default case when no values match\n            return new Element$1(`ng-template`, [new Attribute('ngSwitchDefault', '', c.valueSourceSpan)], expansionResult.nodes, c.sourceSpan, c.sourceSpan, c.sourceSpan);\n        }\n        return new Element$1(`ng-template`, [new Attribute('ngSwitchCase', `${c.value}`, c.valueSourceSpan)], expansionResult.nodes, c.sourceSpan, c.sourceSpan, c.sourceSpan);\n    });\n    const switchAttr = new Attribute('[ngSwitch]', ast.switchValue, ast.switchValueSourceSpan);\n    return new Element$1('ng-container', [switchAttr], children, ast.sourceSpan, ast.sourceSpan, ast.sourceSpan);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * A segment of text within the template.\n */\nclass TextAst {\n    constructor(value, ngContentIndex, sourceSpan) {\n        this.value = value;\n        this.ngContentIndex = ngContentIndex;\n        this.sourceSpan = sourceSpan;\n    }\n    visit(visitor, context) {\n        return visitor.visitText(this, context);\n    }\n}\n/**\n * A bound expression within the text of a template.\n */\nclass BoundTextAst {\n    constructor(value, ngContentIndex, sourceSpan) {\n        this.value = value;\n        this.ngContentIndex = ngContentIndex;\n        this.sourceSpan = sourceSpan;\n    }\n    visit(visitor, context) {\n        return visitor.visitBoundText(this, context);\n    }\n}\n/**\n * A plain attribute on an element.\n */\nclass AttrAst {\n    constructor(name, value, sourceSpan) {\n        this.name = name;\n        this.value = value;\n        this.sourceSpan = sourceSpan;\n    }\n    visit(visitor, context) {\n        return visitor.visitAttr(this, context);\n    }\n}\nconst BoundPropertyMapping = {\n    [4 /* Animation */]: 4 /* Animation */,\n    [1 /* Attribute */]: 1 /* Attribute */,\n    [2 /* Class */]: 2 /* Class */,\n    [0 /* Property */]: 0 /* Property */,\n    [3 /* Style */]: 3 /* Style */,\n};\n/**\n * A binding for an element property (e.g. `[property]=\"expression\"`) or an animation trigger (e.g.\n * `[@trigger]=\"stateExp\"`)\n */\nclass BoundElementPropertyAst {\n    constructor(name, type, securityContext, value, unit, sourceSpan) {\n        this.name = name;\n        this.type = type;\n        this.securityContext = securityContext;\n        this.value = value;\n        this.unit = unit;\n        this.sourceSpan = sourceSpan;\n        this.isAnimation = this.type === 4 /* Animation */;\n    }\n    static fromBoundProperty(prop) {\n        const type = BoundPropertyMapping[prop.type];\n        return new BoundElementPropertyAst(prop.name, type, prop.securityContext, prop.value, prop.unit, prop.sourceSpan);\n    }\n    visit(visitor, context) {\n        return visitor.visitElementProperty(this, context);\n    }\n}\n/**\n * A binding for an element event (e.g. `(event)=\"handler()\"`) or an animation trigger event (e.g.\n * `(@trigger.phase)=\"callback($event)\"`).\n */\nclass BoundEventAst {\n    constructor(name, target, phase, handler, sourceSpan, handlerSpan) {\n        this.name = name;\n        this.target = target;\n        this.phase = phase;\n        this.handler = handler;\n        this.sourceSpan = sourceSpan;\n        this.handlerSpan = handlerSpan;\n        this.fullName = BoundEventAst.calcFullName(this.name, this.target, this.phase);\n        this.isAnimation = !!this.phase;\n    }\n    static calcFullName(name, target, phase) {\n        if (target) {\n            return `${target}:${name}`;\n        }\n        if (phase) {\n            return `@${name}.${phase}`;\n        }\n        return name;\n    }\n    static fromParsedEvent(event) {\n        const target = event.type === 0 /* Regular */ ? event.targetOrPhase : null;\n        const phase = event.type === 1 /* Animation */ ? event.targetOrPhase : null;\n        return new BoundEventAst(event.name, target, phase, event.handler, event.sourceSpan, event.handlerSpan);\n    }\n    visit(visitor, context) {\n        return visitor.visitEvent(this, context);\n    }\n}\n/**\n * A reference declaration on an element (e.g. `let someName=\"expression\"`).\n */\nclass ReferenceAst {\n    constructor(name, value, originalValue, sourceSpan) {\n        this.name = name;\n        this.value = value;\n        this.originalValue = originalValue;\n        this.sourceSpan = sourceSpan;\n    }\n    visit(visitor, context) {\n        return visitor.visitReference(this, context);\n    }\n}\n/**\n * A variable declaration on a <ng-template> (e.g. `var-someName=\"someLocalName\"`).\n */\nclass VariableAst {\n    constructor(name, value, sourceSpan, valueSpan) {\n        this.name = name;\n        this.value = value;\n        this.sourceSpan = sourceSpan;\n        this.valueSpan = valueSpan;\n    }\n    static fromParsedVariable(v) {\n        return new VariableAst(v.name, v.value, v.sourceSpan, v.valueSpan);\n    }\n    visit(visitor, context) {\n        return visitor.visitVariable(this, context);\n    }\n}\n/**\n * An element declaration in a template.\n */\nclass ElementAst {\n    constructor(name, attrs, inputs, outputs, references, directives, providers, hasViewContainer, queryMatches, children, ngContentIndex, sourceSpan, endSourceSpan) {\n        this.name = name;\n        this.attrs = attrs;\n        this.inputs = inputs;\n        this.outputs = outputs;\n        this.references = references;\n        this.directives = directives;\n        this.providers = providers;\n        this.hasViewContainer = hasViewContainer;\n        this.queryMatches = queryMatches;\n        this.children = children;\n        this.ngContentIndex = ngContentIndex;\n        this.sourceSpan = sourceSpan;\n        this.endSourceSpan = endSourceSpan;\n    }\n    visit(visitor, context) {\n        return visitor.visitElement(this, context);\n    }\n}\n/**\n * A `<ng-template>` element included in an Angular template.\n */\nclass EmbeddedTemplateAst {\n    constructor(attrs, outputs, references, variables, directives, providers, hasViewContainer, queryMatches, children, ngContentIndex, sourceSpan) {\n        this.attrs = attrs;\n        this.outputs = outputs;\n        this.references = references;\n        this.variables = variables;\n        this.directives = directives;\n        this.providers = providers;\n        this.hasViewContainer = hasViewContainer;\n        this.queryMatches = queryMatches;\n        this.children = children;\n        this.ngContentIndex = ngContentIndex;\n        this.sourceSpan = sourceSpan;\n    }\n    visit(visitor, context) {\n        return visitor.visitEmbeddedTemplate(this, context);\n    }\n}\n/**\n * A directive property with a bound value (e.g. `*ngIf=\"condition\").\n */\nclass BoundDirectivePropertyAst {\n    constructor(directiveName, templateName, value, sourceSpan) {\n        this.directiveName = directiveName;\n        this.templateName = templateName;\n        this.value = value;\n        this.sourceSpan = sourceSpan;\n    }\n    visit(visitor, context) {\n        return visitor.visitDirectiveProperty(this, context);\n    }\n}\n/**\n * A directive declared on an element.\n */\nclass DirectiveAst {\n    constructor(directive, inputs, hostProperties, hostEvents, contentQueryStartId, sourceSpan) {\n        this.directive = directive;\n        this.inputs = inputs;\n        this.hostProperties = hostProperties;\n        this.hostEvents = hostEvents;\n        this.contentQueryStartId = contentQueryStartId;\n        this.sourceSpan = sourceSpan;\n    }\n    visit(visitor, context) {\n        return visitor.visitDirective(this, context);\n    }\n}\n/**\n * A provider declared on an element\n */\nclass ProviderAst {\n    constructor(token, multiProvider, eager, providers, providerType, lifecycleHooks, sourceSpan, isModule) {\n        this.token = token;\n        this.multiProvider = multiProvider;\n        this.eager = eager;\n        this.providers = providers;\n        this.providerType = providerType;\n        this.lifecycleHooks = lifecycleHooks;\n        this.sourceSpan = sourceSpan;\n        this.isModule = isModule;\n    }\n    visit(visitor, context) {\n        // No visit method in the visitor for now...\n        return null;\n    }\n}\nvar ProviderAstType;\n(function (ProviderAstType) {\n    ProviderAstType[ProviderAstType[\"PublicService\"] = 0] = \"PublicService\";\n    ProviderAstType[ProviderAstType[\"PrivateService\"] = 1] = \"PrivateService\";\n    ProviderAstType[ProviderAstType[\"Component\"] = 2] = \"Component\";\n    ProviderAstType[ProviderAstType[\"Directive\"] = 3] = \"Directive\";\n    ProviderAstType[ProviderAstType[\"Builtin\"] = 4] = \"Builtin\";\n})(ProviderAstType || (ProviderAstType = {}));\n/**\n * Position where content is to be projected (instance of `<ng-content>` in a template).\n */\nclass NgContentAst {\n    constructor(index, ngContentIndex, sourceSpan) {\n        this.index = index;\n        this.ngContentIndex = ngContentIndex;\n        this.sourceSpan = sourceSpan;\n    }\n    visit(visitor, context) {\n        return visitor.visitNgContent(this, context);\n    }\n}\n/**\n * A visitor that accepts each node but doesn't do anything. It is intended to be used\n * as the base class for a visitor that is only interested in a subset of the node types.\n */\nclass NullTemplateVisitor {\n    visitNgContent(ast, context) { }\n    visitEmbeddedTemplate(ast, context) { }\n    visitElement(ast, context) { }\n    visitReference(ast, context) { }\n    visitVariable(ast, context) { }\n    visitEvent(ast, context) { }\n    visitElementProperty(ast, context) { }\n    visitAttr(ast, context) { }\n    visitBoundText(ast, context) { }\n    visitText(ast, context) { }\n    visitDirective(ast, context) { }\n    visitDirectiveProperty(ast, context) { }\n}\n/**\n * Base class that can be used to build a visitor that visits each node\n * in an template ast recursively.\n */\nclass RecursiveTemplateAstVisitor extends NullTemplateVisitor {\n    constructor() {\n        super();\n    }\n    // Nodes with children\n    visitEmbeddedTemplate(ast, context) {\n        return this.visitChildren(context, visit => {\n            visit(ast.attrs);\n            visit(ast.references);\n            visit(ast.variables);\n            visit(ast.directives);\n            visit(ast.providers);\n            visit(ast.children);\n        });\n    }\n    visitElement(ast, context) {\n        return this.visitChildren(context, visit => {\n            visit(ast.attrs);\n            visit(ast.inputs);\n            visit(ast.outputs);\n            visit(ast.references);\n            visit(ast.directives);\n            visit(ast.providers);\n            visit(ast.children);\n        });\n    }\n    visitDirective(ast, context) {\n        return this.visitChildren(context, visit => {\n            visit(ast.inputs);\n            visit(ast.hostProperties);\n            visit(ast.hostEvents);\n        });\n    }\n    visitChildren(context, cb) {\n        let results = [];\n        let t = this;\n        function visit(children) {\n            if (children && children.length)\n                results.push(templateVisitAll(t, children, context));\n        }\n        cb(visit);\n        return Array.prototype.concat.apply([], results);\n    }\n}\n/**\n * Visit every node in a list of {@link TemplateAst}s with the given {@link TemplateAstVisitor}.\n */\nfunction templateVisitAll(visitor, asts, context = null) {\n    const result = [];\n    const visit = visitor.visit ?\n        (ast) => visitor.visit(ast, context) || ast.visit(visitor, context) :\n        (ast) => ast.visit(visitor, context);\n    asts.forEach(ast => {\n        const astResult = visit(ast);\n        if (astResult) {\n            result.push(astResult);\n        }\n    });\n    return result;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass ProviderError extends ParseError {\n    constructor(message, span) {\n        super(span, message);\n    }\n}\nclass ProviderViewContext {\n    constructor(reflector, component) {\n        this.reflector = reflector;\n        this.component = component;\n        this.errors = [];\n        this.viewQueries = _getViewQueries(component);\n        this.viewProviders = new Map();\n        component.viewProviders.forEach((provider) => {\n            if (this.viewProviders.get(tokenReference(provider.token)) == null) {\n                this.viewProviders.set(tokenReference(provider.token), true);\n            }\n        });\n    }\n}\nclass ProviderElementContext {\n    constructor(viewContext, _parent, _isViewRoot, _directiveAsts, attrs, refs, isTemplate, contentQueryStartId, _sourceSpan) {\n        this.viewContext = viewContext;\n        this._parent = _parent;\n        this._isViewRoot = _isViewRoot;\n        this._directiveAsts = _directiveAsts;\n        this._sourceSpan = _sourceSpan;\n        this._transformedProviders = new Map();\n        this._seenProviders = new Map();\n        this._queriedTokens = new Map();\n        this.transformedHasViewContainer = false;\n        this._attrs = {};\n        attrs.forEach((attrAst) => this._attrs[attrAst.name] = attrAst.value);\n        const directivesMeta = _directiveAsts.map(directiveAst => directiveAst.directive);\n        this._allProviders =\n            _resolveProvidersFromDirectives(directivesMeta, _sourceSpan, viewContext.errors);\n        this._contentQueries = _getContentQueries(contentQueryStartId, directivesMeta);\n        Array.from(this._allProviders.values()).forEach((provider) => {\n            this._addQueryReadsTo(provider.token, provider.token, this._queriedTokens);\n        });\n        if (isTemplate) {\n            const templateRefId = createTokenForExternalReference(this.viewContext.reflector, Identifiers.TemplateRef);\n            this._addQueryReadsTo(templateRefId, templateRefId, this._queriedTokens);\n        }\n        refs.forEach((refAst) => {\n            let defaultQueryValue = refAst.value ||\n                createTokenForExternalReference(this.viewContext.reflector, Identifiers.ElementRef);\n            this._addQueryReadsTo({ value: refAst.name }, defaultQueryValue, this._queriedTokens);\n        });\n        if (this._queriedTokens.get(this.viewContext.reflector.resolveExternalReference(Identifiers.ViewContainerRef))) {\n            this.transformedHasViewContainer = true;\n        }\n        // create the providers that we know are eager first\n        Array.from(this._allProviders.values()).forEach((provider) => {\n            const eager = provider.eager || this._queriedTokens.get(tokenReference(provider.token));\n            if (eager) {\n                this._getOrCreateLocalProvider(provider.providerType, provider.token, true);\n            }\n        });\n    }\n    afterElement() {\n        // collect lazy providers\n        Array.from(this._allProviders.values()).forEach((provider) => {\n            this._getOrCreateLocalProvider(provider.providerType, provider.token, false);\n        });\n    }\n    get transformProviders() {\n        // Note: Maps keep their insertion order.\n        const lazyProviders = [];\n        const eagerProviders = [];\n        this._transformedProviders.forEach(provider => {\n            if (provider.eager) {\n                eagerProviders.push(provider);\n            }\n            else {\n                lazyProviders.push(provider);\n            }\n        });\n        return lazyProviders.concat(eagerProviders);\n    }\n    get transformedDirectiveAsts() {\n        const sortedProviderTypes = this.transformProviders.map(provider => provider.token.identifier);\n        const sortedDirectives = this._directiveAsts.slice();\n        sortedDirectives.sort((dir1, dir2) => sortedProviderTypes.indexOf(dir1.directive.type) -\n            sortedProviderTypes.indexOf(dir2.directive.type));\n        return sortedDirectives;\n    }\n    get queryMatches() {\n        const allMatches = [];\n        this._queriedTokens.forEach((matches) => {\n            allMatches.push(...matches);\n        });\n        return allMatches;\n    }\n    _addQueryReadsTo(token, defaultValue, queryReadTokens) {\n        this._getQueriesFor(token).forEach((query) => {\n            const queryValue = query.meta.read || defaultValue;\n            const tokenRef = tokenReference(queryValue);\n            let queryMatches = queryReadTokens.get(tokenRef);\n            if (!queryMatches) {\n                queryMatches = [];\n                queryReadTokens.set(tokenRef, queryMatches);\n            }\n            queryMatches.push({ queryId: query.queryId, value: queryValue });\n        });\n    }\n    _getQueriesFor(token) {\n        const result = [];\n        let currentEl = this;\n        let distance = 0;\n        let queries;\n        while (currentEl !== null) {\n            queries = currentEl._contentQueries.get(tokenReference(token));\n            if (queries) {\n                result.push(...queries.filter((query) => query.meta.descendants || distance <= 1));\n            }\n            if (currentEl._directiveAsts.length > 0) {\n                distance++;\n            }\n            currentEl = currentEl._parent;\n        }\n        queries = this.viewContext.viewQueries.get(tokenReference(token));\n        if (queries) {\n            result.push(...queries);\n        }\n        return result;\n    }\n    _getOrCreateLocalProvider(requestingProviderType, token, eager) {\n        const resolvedProvider = this._allProviders.get(tokenReference(token));\n        if (!resolvedProvider ||\n            ((requestingProviderType === ProviderAstType.Directive ||\n                requestingProviderType === ProviderAstType.PublicService) &&\n                resolvedProvider.providerType === ProviderAstType.PrivateService) ||\n            ((requestingProviderType === ProviderAstType.PrivateService ||\n                requestingProviderType === ProviderAstType.PublicService) &&\n                resolvedProvider.providerType === ProviderAstType.Builtin)) {\n            return null;\n        }\n        let transformedProviderAst = this._transformedProviders.get(tokenReference(token));\n        if (transformedProviderAst) {\n            return transformedProviderAst;\n        }\n        if (this._seenProviders.get(tokenReference(token)) != null) {\n            this.viewContext.errors.push(new ProviderError(`Cannot instantiate cyclic dependency! ${tokenName(token)}`, this._sourceSpan));\n            return null;\n        }\n        this._seenProviders.set(tokenReference(token), true);\n        const transformedProviders = resolvedProvider.providers.map((provider) => {\n            let transformedUseValue = provider.useValue;\n            let transformedUseExisting = provider.useExisting;\n            let transformedDeps = undefined;\n            if (provider.useExisting != null) {\n                const existingDiDep = this._getDependency(resolvedProvider.providerType, { token: provider.useExisting }, eager);\n                if (existingDiDep.token != null) {\n                    transformedUseExisting = existingDiDep.token;\n                }\n                else {\n                    transformedUseExisting = null;\n                    transformedUseValue = existingDiDep.value;\n                }\n            }\n            else if (provider.useFactory) {\n                const deps = provider.deps || provider.useFactory.diDeps;\n                transformedDeps =\n                    deps.map((dep) => this._getDependency(resolvedProvider.providerType, dep, eager));\n            }\n            else if (provider.useClass) {\n                const deps = provider.deps || provider.useClass.diDeps;\n                transformedDeps =\n                    deps.map((dep) => this._getDependency(resolvedProvider.providerType, dep, eager));\n            }\n            return _transformProvider(provider, {\n                useExisting: transformedUseExisting,\n                useValue: transformedUseValue,\n                deps: transformedDeps\n            });\n        });\n        transformedProviderAst =\n            _transformProviderAst(resolvedProvider, { eager: eager, providers: transformedProviders });\n        this._transformedProviders.set(tokenReference(token), transformedProviderAst);\n        return transformedProviderAst;\n    }\n    _getLocalDependency(requestingProviderType, dep, eager = false) {\n        if (dep.isAttribute) {\n            const attrValue = this._attrs[dep.token.value];\n            return { isValue: true, value: attrValue == null ? null : attrValue };\n        }\n        if (dep.token != null) {\n            // access builtints\n            if ((requestingProviderType === ProviderAstType.Directive ||\n                requestingProviderType === ProviderAstType.Component)) {\n                if (tokenReference(dep.token) ===\n                    this.viewContext.reflector.resolveExternalReference(Identifiers.Renderer) ||\n                    tokenReference(dep.token) ===\n                        this.viewContext.reflector.resolveExternalReference(Identifiers.ElementRef) ||\n                    tokenReference(dep.token) ===\n                        this.viewContext.reflector.resolveExternalReference(Identifiers.ChangeDetectorRef) ||\n                    tokenReference(dep.token) ===\n                        this.viewContext.reflector.resolveExternalReference(Identifiers.TemplateRef)) {\n                    return dep;\n                }\n                if (tokenReference(dep.token) ===\n                    this.viewContext.reflector.resolveExternalReference(Identifiers.ViewContainerRef)) {\n                    this.transformedHasViewContainer = true;\n                }\n            }\n            // access the injector\n            if (tokenReference(dep.token) ===\n                this.viewContext.reflector.resolveExternalReference(Identifiers.Injector)) {\n                return dep;\n            }\n            // access providers\n            if (this._getOrCreateLocalProvider(requestingProviderType, dep.token, eager) != null) {\n                return dep;\n            }\n        }\n        return null;\n    }\n    _getDependency(requestingProviderType, dep, eager = false) {\n        let currElement = this;\n        let currEager = eager;\n        let result = null;\n        if (!dep.isSkipSelf) {\n            result = this._getLocalDependency(requestingProviderType, dep, eager);\n        }\n        if (dep.isSelf) {\n            if (!result && dep.isOptional) {\n                result = { isValue: true, value: null };\n            }\n        }\n        else {\n            // check parent elements\n            while (!result && currElement._parent) {\n                const prevElement = currElement;\n                currElement = currElement._parent;\n                if (prevElement._isViewRoot) {\n                    currEager = false;\n                }\n                result = currElement._getLocalDependency(ProviderAstType.PublicService, dep, currEager);\n            }\n            // check @Host restriction\n            if (!result) {\n                if (!dep.isHost || this.viewContext.component.isHost ||\n                    this.viewContext.component.type.reference === tokenReference(dep.token) ||\n                    this.viewContext.viewProviders.get(tokenReference(dep.token)) != null) {\n                    result = dep;\n                }\n                else {\n                    result = dep.isOptional ? { isValue: true, value: null } : null;\n                }\n            }\n        }\n        if (!result) {\n            this.viewContext.errors.push(new ProviderError(`No provider for ${tokenName(dep.token)}`, this._sourceSpan));\n        }\n        return result;\n    }\n}\nclass NgModuleProviderAnalyzer {\n    constructor(reflector, ngModule, extraProviders, sourceSpan) {\n        this.reflector = reflector;\n        this._transformedProviders = new Map();\n        this._seenProviders = new Map();\n        this._errors = [];\n        this._allProviders = new Map();\n        ngModule.transitiveModule.modules.forEach((ngModuleType) => {\n            const ngModuleProvider = { token: { identifier: ngModuleType }, useClass: ngModuleType };\n            _resolveProviders([ngModuleProvider], ProviderAstType.PublicService, true, sourceSpan, this._errors, this._allProviders, /* isModule */ true);\n        });\n        _resolveProviders(ngModule.transitiveModule.providers.map(entry => entry.provider).concat(extraProviders), ProviderAstType.PublicService, false, sourceSpan, this._errors, this._allProviders, \n        /* isModule */ false);\n    }\n    parse() {\n        Array.from(this._allProviders.values()).forEach((provider) => {\n            this._getOrCreateLocalProvider(provider.token, provider.eager);\n        });\n        if (this._errors.length > 0) {\n            const errorString = this._errors.join('\\n');\n            throw new Error(`Provider parse errors:\\n${errorString}`);\n        }\n        // Note: Maps keep their insertion order.\n        const lazyProviders = [];\n        const eagerProviders = [];\n        this._transformedProviders.forEach(provider => {\n            if (provider.eager) {\n                eagerProviders.push(provider);\n            }\n            else {\n                lazyProviders.push(provider);\n            }\n        });\n        return lazyProviders.concat(eagerProviders);\n    }\n    _getOrCreateLocalProvider(token, eager) {\n        const resolvedProvider = this._allProviders.get(tokenReference(token));\n        if (!resolvedProvider) {\n            return null;\n        }\n        let transformedProviderAst = this._transformedProviders.get(tokenReference(token));\n        if (transformedProviderAst) {\n            return transformedProviderAst;\n        }\n        if (this._seenProviders.get(tokenReference(token)) != null) {\n            this._errors.push(new ProviderError(`Cannot instantiate cyclic dependency! ${tokenName(token)}`, resolvedProvider.sourceSpan));\n            return null;\n        }\n        this._seenProviders.set(tokenReference(token), true);\n        const transformedProviders = resolvedProvider.providers.map((provider) => {\n            let transformedUseValue = provider.useValue;\n            let transformedUseExisting = provider.useExisting;\n            let transformedDeps = undefined;\n            if (provider.useExisting != null) {\n                const existingDiDep = this._getDependency({ token: provider.useExisting }, eager, resolvedProvider.sourceSpan);\n                if (existingDiDep.token != null) {\n                    transformedUseExisting = existingDiDep.token;\n                }\n                else {\n                    transformedUseExisting = null;\n                    transformedUseValue = existingDiDep.value;\n                }\n            }\n            else if (provider.useFactory) {\n                const deps = provider.deps || provider.useFactory.diDeps;\n                transformedDeps =\n                    deps.map((dep) => this._getDependency(dep, eager, resolvedProvider.sourceSpan));\n            }\n            else if (provider.useClass) {\n                const deps = provider.deps || provider.useClass.diDeps;\n                transformedDeps =\n                    deps.map((dep) => this._getDependency(dep, eager, resolvedProvider.sourceSpan));\n            }\n            return _transformProvider(provider, {\n                useExisting: transformedUseExisting,\n                useValue: transformedUseValue,\n                deps: transformedDeps\n            });\n        });\n        transformedProviderAst =\n            _transformProviderAst(resolvedProvider, { eager: eager, providers: transformedProviders });\n        this._transformedProviders.set(tokenReference(token), transformedProviderAst);\n        return transformedProviderAst;\n    }\n    _getDependency(dep, eager = false, requestorSourceSpan) {\n        let foundLocal = false;\n        if (!dep.isSkipSelf && dep.token != null) {\n            // access the injector\n            if (tokenReference(dep.token) ===\n                this.reflector.resolveExternalReference(Identifiers.Injector) ||\n                tokenReference(dep.token) ===\n                    this.reflector.resolveExternalReference(Identifiers.ComponentFactoryResolver)) {\n                foundLocal = true;\n                // access providers\n            }\n            else if (this._getOrCreateLocalProvider(dep.token, eager) != null) {\n                foundLocal = true;\n            }\n        }\n        return dep;\n    }\n}\nfunction _transformProvider(provider, { useExisting, useValue, deps }) {\n    return {\n        token: provider.token,\n        useClass: provider.useClass,\n        useExisting: useExisting,\n        useFactory: provider.useFactory,\n        useValue: useValue,\n        deps: deps,\n        multi: provider.multi\n    };\n}\nfunction _transformProviderAst(provider, { eager, providers }) {\n    return new ProviderAst(provider.token, provider.multiProvider, provider.eager || eager, providers, provider.providerType, provider.lifecycleHooks, provider.sourceSpan, provider.isModule);\n}\nfunction _resolveProvidersFromDirectives(directives, sourceSpan, targetErrors) {\n    const providersByToken = new Map();\n    directives.forEach((directive) => {\n        const dirProvider = { token: { identifier: directive.type }, useClass: directive.type };\n        _resolveProviders([dirProvider], directive.isComponent ? ProviderAstType.Component : ProviderAstType.Directive, true, sourceSpan, targetErrors, providersByToken, /* isModule */ false);\n    });\n    // Note: directives need to be able to overwrite providers of a component!\n    const directivesWithComponentFirst = directives.filter(dir => dir.isComponent).concat(directives.filter(dir => !dir.isComponent));\n    directivesWithComponentFirst.forEach((directive) => {\n        _resolveProviders(directive.providers, ProviderAstType.PublicService, false, sourceSpan, targetErrors, providersByToken, /* isModule */ false);\n        _resolveProviders(directive.viewProviders, ProviderAstType.PrivateService, false, sourceSpan, targetErrors, providersByToken, /* isModule */ false);\n    });\n    return providersByToken;\n}\nfunction _resolveProviders(providers, providerType, eager, sourceSpan, targetErrors, targetProvidersByToken, isModule) {\n    providers.forEach((provider) => {\n        let resolvedProvider = targetProvidersByToken.get(tokenReference(provider.token));\n        if (resolvedProvider != null && !!resolvedProvider.multiProvider !== !!provider.multi) {\n            targetErrors.push(new ProviderError(`Mixing multi and non multi provider is not possible for token ${tokenName(resolvedProvider.token)}`, sourceSpan));\n        }\n        if (!resolvedProvider) {\n            const lifecycleHooks = provider.token.identifier &&\n                provider.token.identifier.lifecycleHooks ?\n                provider.token.identifier.lifecycleHooks :\n                [];\n            const isUseValue = !(provider.useClass || provider.useExisting || provider.useFactory);\n            resolvedProvider = new ProviderAst(provider.token, !!provider.multi, eager || isUseValue, [provider], providerType, lifecycleHooks, sourceSpan, isModule);\n            targetProvidersByToken.set(tokenReference(provider.token), resolvedProvider);\n        }\n        else {\n            if (!provider.multi) {\n                resolvedProvider.providers.length = 0;\n            }\n            resolvedProvider.providers.push(provider);\n        }\n    });\n}\nfunction _getViewQueries(component) {\n    // Note: queries start with id 1 so we can use the number in a Bloom filter!\n    let viewQueryId = 1;\n    const viewQueries = new Map();\n    if (component.viewQueries) {\n        component.viewQueries.forEach((query) => _addQueryToTokenMap(viewQueries, { meta: query, queryId: viewQueryId++ }));\n    }\n    return viewQueries;\n}\nfunction _getContentQueries(contentQueryStartId, directives) {\n    let contentQueryId = contentQueryStartId;\n    const contentQueries = new Map();\n    directives.forEach((directive, directiveIndex) => {\n        if (directive.queries) {\n            directive.queries.forEach((query) => _addQueryToTokenMap(contentQueries, { meta: query, queryId: contentQueryId++ }));\n        }\n    });\n    return contentQueries;\n}\nfunction _addQueryToTokenMap(map, query) {\n    query.meta.selectors.forEach((token) => {\n        let entry = map.get(tokenReference(token));\n        if (!entry) {\n            entry = [];\n            map.set(tokenReference(token), entry);\n        }\n        entry.push(query);\n    });\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass StyleWithImports {\n    constructor(style, styleUrls) {\n        this.style = style;\n        this.styleUrls = styleUrls;\n    }\n}\nfunction isStyleUrlResolvable(url) {\n    if (url == null || url.length === 0 || url[0] == '/')\n        return false;\n    const schemeMatch = url.match(URL_WITH_SCHEMA_REGEXP);\n    return schemeMatch === null || schemeMatch[1] == 'package' || schemeMatch[1] == 'asset';\n}\n/**\n * Rewrites stylesheets by resolving and removing the @import urls that\n * are either relative or don't have a `package:` scheme\n */\nfunction extractStyleUrls(resolver, baseUrl, cssText) {\n    const foundUrls = [];\n    const modifiedCssText = cssText.replace(CSS_STRIPPABLE_COMMENT_REGEXP, '')\n        .replace(CSS_IMPORT_REGEXP, (...m) => {\n        const url = m[1] || m[2];\n        if (!isStyleUrlResolvable(url)) {\n            // Do not attempt to resolve non-package absolute URLs with URI\n            // scheme\n            return m[0];\n        }\n        foundUrls.push(resolver.resolve(baseUrl, url));\n        return '';\n    });\n    return new StyleWithImports(modifiedCssText, foundUrls);\n}\nconst CSS_IMPORT_REGEXP = /@import\\s+(?:url\\()?\\s*(?:(?:['\"]([^'\"]*))|([^;\\)\\s]*))[^;]*;?/g;\nconst CSS_STRIPPABLE_COMMENT_REGEXP = /\\/\\*(?!#\\s*(?:sourceURL|sourceMappingURL)=)[\\s\\S]+?\\*\\//g;\nconst URL_WITH_SCHEMA_REGEXP = /^([^:/?#]+):/;\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst PROPERTY_PARTS_SEPARATOR = '.';\nconst ATTRIBUTE_PREFIX = 'attr';\nconst CLASS_PREFIX = 'class';\nconst STYLE_PREFIX = 'style';\nconst TEMPLATE_ATTR_PREFIX = '*';\nconst ANIMATE_PROP_PREFIX = 'animate-';\n/**\n * Parses bindings in templates and in the directive host area.\n */\nclass BindingParser {\n    constructor(_exprParser, _interpolationConfig, _schemaRegistry, pipes, errors) {\n        this._exprParser = _exprParser;\n        this._interpolationConfig = _interpolationConfig;\n        this._schemaRegistry = _schemaRegistry;\n        this.errors = errors;\n        this.pipesByName = null;\n        this._usedPipes = new Map();\n        // When the `pipes` parameter is `null`, do not check for used pipes\n        // This is used in IVY when we might not know the available pipes at compile time\n        if (pipes) {\n            const pipesByName = new Map();\n            pipes.forEach(pipe => pipesByName.set(pipe.name, pipe));\n            this.pipesByName = pipesByName;\n        }\n    }\n    get interpolationConfig() {\n        return this._interpolationConfig;\n    }\n    getUsedPipes() {\n        return Array.from(this._usedPipes.values());\n    }\n    createBoundHostProperties(dirMeta, sourceSpan) {\n        if (dirMeta.hostProperties) {\n            const boundProps = [];\n            Object.keys(dirMeta.hostProperties).forEach(propName => {\n                const expression = dirMeta.hostProperties[propName];\n                if (typeof expression === 'string') {\n                    this.parsePropertyBinding(propName, expression, true, sourceSpan, sourceSpan.start.offset, undefined, [], boundProps);\n                }\n                else {\n                    this._reportError(`Value of the host property binding \"${propName}\" needs to be a string representing an expression but got \"${expression}\" (${typeof expression})`, sourceSpan);\n                }\n            });\n            return boundProps;\n        }\n        return null;\n    }\n    createDirectiveHostPropertyAsts(dirMeta, elementSelector, sourceSpan) {\n        const boundProps = this.createBoundHostProperties(dirMeta, sourceSpan);\n        return boundProps &&\n            boundProps.map((prop) => this.createBoundElementProperty(elementSelector, prop));\n    }\n    createDirectiveHostEventAsts(dirMeta, sourceSpan) {\n        if (dirMeta.hostListeners) {\n            const targetEvents = [];\n            Object.keys(dirMeta.hostListeners).forEach(propName => {\n                const expression = dirMeta.hostListeners[propName];\n                if (typeof expression === 'string') {\n                    // TODO: pass a more accurate handlerSpan for this event.\n                    this.parseEvent(propName, expression, sourceSpan, sourceSpan, [], targetEvents);\n                }\n                else {\n                    this._reportError(`Value of the host listener \"${propName}\" needs to be a string representing an expression but got \"${expression}\" (${typeof expression})`, sourceSpan);\n                }\n            });\n            return targetEvents;\n        }\n        return null;\n    }\n    parseInterpolation(value, sourceSpan) {\n        const sourceInfo = sourceSpan.start.toString();\n        try {\n            const ast = this._exprParser.parseInterpolation(value, sourceInfo, sourceSpan.start.offset, this._interpolationConfig);\n            if (ast)\n                this._reportExpressionParserErrors(ast.errors, sourceSpan);\n            this._checkPipes(ast, sourceSpan);\n            return ast;\n        }\n        catch (e) {\n            this._reportError(`${e}`, sourceSpan);\n            return this._exprParser.wrapLiteralPrimitive('ERROR', sourceInfo, sourceSpan.start.offset);\n        }\n    }\n    /**\n     * Parses the bindings in a microsyntax expression, and converts them to\n     * `ParsedProperty` or `ParsedVariable`.\n     *\n     * @param tplKey template binding name\n     * @param tplValue template binding value\n     * @param sourceSpan span of template binding relative to entire the template\n     * @param absoluteValueOffset start of the tplValue relative to the entire template\n     * @param targetMatchableAttrs potential attributes to match in the template\n     * @param targetProps target property bindings in the template\n     * @param targetVars target variables in the template\n     */\n    parseInlineTemplateBinding(tplKey, tplValue, sourceSpan, absoluteValueOffset, targetMatchableAttrs, targetProps, targetVars) {\n        const absoluteKeyOffset = sourceSpan.start.offset + TEMPLATE_ATTR_PREFIX.length;\n        const bindings = this._parseTemplateBindings(tplKey, tplValue, sourceSpan, absoluteKeyOffset, absoluteValueOffset);\n        for (const binding of bindings) {\n            // sourceSpan is for the entire HTML attribute. bindingSpan is for a particular\n            // binding within the microsyntax expression so it's more narrow than sourceSpan.\n            const bindingSpan = moveParseSourceSpan(sourceSpan, binding.sourceSpan);\n            const key = binding.key.source;\n            const keySpan = moveParseSourceSpan(sourceSpan, binding.key.span);\n            if (binding instanceof VariableBinding) {\n                const value = binding.value ? binding.value.source : '$implicit';\n                const valueSpan = binding.value ? moveParseSourceSpan(sourceSpan, binding.value.span) : undefined;\n                targetVars.push(new ParsedVariable(key, value, bindingSpan, keySpan, valueSpan));\n            }\n            else if (binding.value) {\n                const valueSpan = moveParseSourceSpan(sourceSpan, binding.value.ast.sourceSpan);\n                this._parsePropertyAst(key, binding.value, sourceSpan, valueSpan, targetMatchableAttrs, targetProps);\n            }\n            else {\n                targetMatchableAttrs.push([key, '']);\n                this.parseLiteralAttr(key, null, sourceSpan, absoluteValueOffset, undefined, targetMatchableAttrs, targetProps);\n            }\n        }\n    }\n    /**\n     * Parses the bindings in a microsyntax expression, e.g.\n     * ```\n     *    <tag *tplKey=\"let value1 = prop; let value2 = localVar\">\n     * ```\n     *\n     * @param tplKey template binding name\n     * @param tplValue template binding value\n     * @param sourceSpan span of template binding relative to entire the template\n     * @param absoluteKeyOffset start of the `tplKey`\n     * @param absoluteValueOffset start of the `tplValue`\n     */\n    _parseTemplateBindings(tplKey, tplValue, sourceSpan, absoluteKeyOffset, absoluteValueOffset) {\n        const sourceInfo = sourceSpan.start.toString();\n        try {\n            const bindingsResult = this._exprParser.parseTemplateBindings(tplKey, tplValue, sourceInfo, absoluteKeyOffset, absoluteValueOffset);\n            this._reportExpressionParserErrors(bindingsResult.errors, sourceSpan);\n            bindingsResult.templateBindings.forEach((binding) => {\n                if (binding.value instanceof ASTWithSource) {\n                    this._checkPipes(binding.value, sourceSpan);\n                }\n            });\n            bindingsResult.warnings.forEach((warning) => {\n                this._reportError(warning, sourceSpan, ParseErrorLevel.WARNING);\n            });\n            return bindingsResult.templateBindings;\n        }\n        catch (e) {\n            this._reportError(`${e}`, sourceSpan);\n            return [];\n        }\n    }\n    parseLiteralAttr(name, value, sourceSpan, absoluteOffset, valueSpan, targetMatchableAttrs, targetProps) {\n        if (isAnimationLabel(name)) {\n            name = name.substring(1);\n            if (value) {\n                this._reportError(`Assigning animation triggers via @prop=\"exp\" attributes with an expression is invalid.` +\n                    ` Use property bindings (e.g. [@prop]=\"exp\") or use an attribute without a value (e.g. @prop) instead.`, sourceSpan, ParseErrorLevel.ERROR);\n            }\n            this._parseAnimation(name, value, sourceSpan, absoluteOffset, valueSpan, targetMatchableAttrs, targetProps);\n        }\n        else {\n            targetProps.push(new ParsedProperty(name, this._exprParser.wrapLiteralPrimitive(value, '', absoluteOffset), ParsedPropertyType.LITERAL_ATTR, sourceSpan, valueSpan));\n        }\n    }\n    parsePropertyBinding(name, expression, isHost, sourceSpan, absoluteOffset, valueSpan, targetMatchableAttrs, targetProps) {\n        if (name.length === 0) {\n            this._reportError(`Property name is missing in binding`, sourceSpan);\n        }\n        let isAnimationProp = false;\n        if (name.startsWith(ANIMATE_PROP_PREFIX)) {\n            isAnimationProp = true;\n            name = name.substring(ANIMATE_PROP_PREFIX.length);\n        }\n        else if (isAnimationLabel(name)) {\n            isAnimationProp = true;\n            name = name.substring(1);\n        }\n        if (isAnimationProp) {\n            this._parseAnimation(name, expression, sourceSpan, absoluteOffset, valueSpan, targetMatchableAttrs, targetProps);\n        }\n        else {\n            this._parsePropertyAst(name, this._parseBinding(expression, isHost, valueSpan || sourceSpan, absoluteOffset), sourceSpan, valueSpan, targetMatchableAttrs, targetProps);\n        }\n    }\n    parsePropertyInterpolation(name, value, sourceSpan, valueSpan, targetMatchableAttrs, targetProps) {\n        const expr = this.parseInterpolation(value, valueSpan || sourceSpan);\n        if (expr) {\n            this._parsePropertyAst(name, expr, sourceSpan, valueSpan, targetMatchableAttrs, targetProps);\n            return true;\n        }\n        return false;\n    }\n    _parsePropertyAst(name, ast, sourceSpan, valueSpan, targetMatchableAttrs, targetProps) {\n        targetMatchableAttrs.push([name, ast.source]);\n        targetProps.push(new ParsedProperty(name, ast, ParsedPropertyType.DEFAULT, sourceSpan, valueSpan));\n    }\n    _parseAnimation(name, expression, sourceSpan, absoluteOffset, valueSpan, targetMatchableAttrs, targetProps) {\n        if (name.length === 0) {\n            this._reportError('Animation trigger is missing', sourceSpan);\n        }\n        // This will occur when a @trigger is not paired with an expression.\n        // For animations it is valid to not have an expression since */void\n        // states will be applied by angular when the element is attached/detached\n        const ast = this._parseBinding(expression || 'undefined', false, valueSpan || sourceSpan, absoluteOffset);\n        targetMatchableAttrs.push([name, ast.source]);\n        targetProps.push(new ParsedProperty(name, ast, ParsedPropertyType.ANIMATION, sourceSpan, valueSpan));\n    }\n    _parseBinding(value, isHostBinding, sourceSpan, absoluteOffset) {\n        const sourceInfo = (sourceSpan && sourceSpan.start || '(unknown)').toString();\n        try {\n            const ast = isHostBinding ?\n                this._exprParser.parseSimpleBinding(value, sourceInfo, absoluteOffset, this._interpolationConfig) :\n                this._exprParser.parseBinding(value, sourceInfo, absoluteOffset, this._interpolationConfig);\n            if (ast)\n                this._reportExpressionParserErrors(ast.errors, sourceSpan);\n            this._checkPipes(ast, sourceSpan);\n            return ast;\n        }\n        catch (e) {\n            this._reportError(`${e}`, sourceSpan);\n            return this._exprParser.wrapLiteralPrimitive('ERROR', sourceInfo, absoluteOffset);\n        }\n    }\n    createBoundElementProperty(elementSelector, boundProp, skipValidation = false, mapPropertyName = true) {\n        if (boundProp.isAnimation) {\n            return new BoundElementProperty(boundProp.name, 4 /* Animation */, SecurityContext.NONE, boundProp.expression, null, boundProp.sourceSpan, boundProp.valueSpan);\n        }\n        let unit = null;\n        let bindingType = undefined;\n        let boundPropertyName = null;\n        const parts = boundProp.name.split(PROPERTY_PARTS_SEPARATOR);\n        let securityContexts = undefined;\n        // Check for special cases (prefix style, attr, class)\n        if (parts.length > 1) {\n            if (parts[0] == ATTRIBUTE_PREFIX) {\n                boundPropertyName = parts.slice(1).join(PROPERTY_PARTS_SEPARATOR);\n                if (!skipValidation) {\n                    this._validatePropertyOrAttributeName(boundPropertyName, boundProp.sourceSpan, true);\n                }\n                securityContexts = calcPossibleSecurityContexts(this._schemaRegistry, elementSelector, boundPropertyName, true);\n                const nsSeparatorIdx = boundPropertyName.indexOf(':');\n                if (nsSeparatorIdx > -1) {\n                    const ns = boundPropertyName.substring(0, nsSeparatorIdx);\n                    const name = boundPropertyName.substring(nsSeparatorIdx + 1);\n                    boundPropertyName = mergeNsAndName(ns, name);\n                }\n                bindingType = 1 /* Attribute */;\n            }\n            else if (parts[0] == CLASS_PREFIX) {\n                boundPropertyName = parts[1];\n                bindingType = 2 /* Class */;\n                securityContexts = [SecurityContext.NONE];\n            }\n            else if (parts[0] == STYLE_PREFIX) {\n                unit = parts.length > 2 ? parts[2] : null;\n                boundPropertyName = parts[1];\n                bindingType = 3 /* Style */;\n                securityContexts = [SecurityContext.STYLE];\n            }\n        }\n        // If not a special case, use the full property name\n        if (boundPropertyName === null) {\n            const mappedPropName = this._schemaRegistry.getMappedPropName(boundProp.name);\n            boundPropertyName = mapPropertyName ? mappedPropName : boundProp.name;\n            securityContexts = calcPossibleSecurityContexts(this._schemaRegistry, elementSelector, mappedPropName, false);\n            bindingType = 0 /* Property */;\n            if (!skipValidation) {\n                this._validatePropertyOrAttributeName(mappedPropName, boundProp.sourceSpan, false);\n            }\n        }\n        return new BoundElementProperty(boundPropertyName, bindingType, securityContexts[0], boundProp.expression, unit, boundProp.sourceSpan, boundProp.valueSpan);\n    }\n    parseEvent(name, expression, sourceSpan, handlerSpan, targetMatchableAttrs, targetEvents) {\n        if (name.length === 0) {\n            this._reportError(`Event name is missing in binding`, sourceSpan);\n        }\n        if (isAnimationLabel(name)) {\n            name = name.substr(1);\n            this._parseAnimationEvent(name, expression, sourceSpan, handlerSpan, targetEvents);\n        }\n        else {\n            this._parseRegularEvent(name, expression, sourceSpan, handlerSpan, targetMatchableAttrs, targetEvents);\n        }\n    }\n    calcPossibleSecurityContexts(selector, propName, isAttribute) {\n        const prop = this._schemaRegistry.getMappedPropName(propName);\n        return calcPossibleSecurityContexts(this._schemaRegistry, selector, prop, isAttribute);\n    }\n    _parseAnimationEvent(name, expression, sourceSpan, handlerSpan, targetEvents) {\n        const matches = splitAtPeriod(name, [name, '']);\n        const eventName = matches[0];\n        const phase = matches[1].toLowerCase();\n        if (phase) {\n            switch (phase) {\n                case 'start':\n                case 'done':\n                    const ast = this._parseAction(expression, handlerSpan);\n                    targetEvents.push(new ParsedEvent(eventName, phase, 1 /* Animation */, ast, sourceSpan, handlerSpan));\n                    break;\n                default:\n                    this._reportError(`The provided animation output phase value \"${phase}\" for \"@${eventName}\" is not supported (use start or done)`, sourceSpan);\n                    break;\n            }\n        }\n        else {\n            this._reportError(`The animation trigger output event (@${eventName}) is missing its phase value name (start or done are currently supported)`, sourceSpan);\n        }\n    }\n    _parseRegularEvent(name, expression, sourceSpan, handlerSpan, targetMatchableAttrs, targetEvents) {\n        // long format: 'target: eventName'\n        const [target, eventName] = splitAtColon(name, [null, name]);\n        const ast = this._parseAction(expression, handlerSpan);\n        targetMatchableAttrs.push([name, ast.source]);\n        targetEvents.push(new ParsedEvent(eventName, target, 0 /* Regular */, ast, sourceSpan, handlerSpan));\n        // Don't detect directives for event names for now,\n        // so don't add the event name to the matchableAttrs\n    }\n    _parseAction(value, sourceSpan) {\n        const sourceInfo = (sourceSpan && sourceSpan.start || '(unknown').toString();\n        const absoluteOffset = (sourceSpan && sourceSpan.start) ? sourceSpan.start.offset : 0;\n        try {\n            const ast = this._exprParser.parseAction(value, sourceInfo, absoluteOffset, this._interpolationConfig);\n            if (ast) {\n                this._reportExpressionParserErrors(ast.errors, sourceSpan);\n            }\n            if (!ast || ast.ast instanceof EmptyExpr) {\n                this._reportError(`Empty expressions are not allowed`, sourceSpan);\n                return this._exprParser.wrapLiteralPrimitive('ERROR', sourceInfo, absoluteOffset);\n            }\n            this._checkPipes(ast, sourceSpan);\n            return ast;\n        }\n        catch (e) {\n            this._reportError(`${e}`, sourceSpan);\n            return this._exprParser.wrapLiteralPrimitive('ERROR', sourceInfo, absoluteOffset);\n        }\n    }\n    _reportError(message, sourceSpan, level = ParseErrorLevel.ERROR) {\n        this.errors.push(new ParseError(sourceSpan, message, level));\n    }\n    _reportExpressionParserErrors(errors, sourceSpan) {\n        for (const error of errors) {\n            this._reportError(error.message, sourceSpan);\n        }\n    }\n    // Make sure all the used pipes are known in `this.pipesByName`\n    _checkPipes(ast, sourceSpan) {\n        if (ast && this.pipesByName) {\n            const collector = new PipeCollector();\n            ast.visit(collector);\n            collector.pipes.forEach((ast, pipeName) => {\n                const pipeMeta = this.pipesByName.get(pipeName);\n                if (!pipeMeta) {\n                    this._reportError(`The pipe '${pipeName}' could not be found`, new ParseSourceSpan(sourceSpan.start.moveBy(ast.span.start), sourceSpan.start.moveBy(ast.span.end)));\n                }\n                else {\n                    this._usedPipes.set(pipeName, pipeMeta);\n                }\n            });\n        }\n    }\n    /**\n     * @param propName the name of the property / attribute\n     * @param sourceSpan\n     * @param isAttr true when binding to an attribute\n     */\n    _validatePropertyOrAttributeName(propName, sourceSpan, isAttr) {\n        const report = isAttr ? this._schemaRegistry.validateAttribute(propName) :\n            this._schemaRegistry.validateProperty(propName);\n        if (report.error) {\n            this._reportError(report.msg, sourceSpan, ParseErrorLevel.ERROR);\n        }\n    }\n}\nclass PipeCollector extends RecursiveAstVisitor$1 {\n    constructor() {\n        super(...arguments);\n        this.pipes = new Map();\n    }\n    visitPipe(ast, context) {\n        this.pipes.set(ast.name, ast);\n        ast.exp.visit(this);\n        this.visitAll(ast.args, context);\n        return null;\n    }\n}\nfunction isAnimationLabel(name) {\n    return name[0] == '@';\n}\nfunction calcPossibleSecurityContexts(registry, selector, propName, isAttribute) {\n    const ctxs = [];\n    CssSelector.parse(selector).forEach((selector) => {\n        const elementNames = selector.element ? [selector.element] : registry.allKnownElementNames();\n        const notElementNames = new Set(selector.notSelectors.filter(selector => selector.isElementSelector())\n            .map((selector) => selector.element));\n        const possibleElementNames = elementNames.filter(elementName => !notElementNames.has(elementName));\n        ctxs.push(...possibleElementNames.map(elementName => registry.securityContext(elementName, propName, isAttribute)));\n    });\n    return ctxs.length === 0 ? [SecurityContext.NONE] : Array.from(new Set(ctxs)).sort();\n}\n/**\n * Compute a new ParseSourceSpan based off an original `sourceSpan` by using\n * absolute offsets from the specified `absoluteSpan`.\n *\n * @param sourceSpan original source span\n * @param absoluteSpan absolute source span to move to\n */\nfunction moveParseSourceSpan(sourceSpan, absoluteSpan) {\n    // The difference of two absolute offsets provide the relative offset\n    const startDiff = absoluteSpan.start - sourceSpan.start.offset;\n    const endDiff = absoluteSpan.end - sourceSpan.end.offset;\n    return new ParseSourceSpan(sourceSpan.start.moveBy(startDiff), sourceSpan.end.moveBy(endDiff));\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst NG_CONTENT_SELECT_ATTR = 'select';\nconst LINK_ELEMENT = 'link';\nconst LINK_STYLE_REL_ATTR = 'rel';\nconst LINK_STYLE_HREF_ATTR = 'href';\nconst LINK_STYLE_REL_VALUE = 'stylesheet';\nconst STYLE_ELEMENT = 'style';\nconst SCRIPT_ELEMENT = 'script';\nconst NG_NON_BINDABLE_ATTR = 'ngNonBindable';\nconst NG_PROJECT_AS = 'ngProjectAs';\nfunction preparseElement(ast) {\n    let selectAttr = null;\n    let hrefAttr = null;\n    let relAttr = null;\n    let nonBindable = false;\n    let projectAs = '';\n    ast.attrs.forEach(attr => {\n        const lcAttrName = attr.name.toLowerCase();\n        if (lcAttrName == NG_CONTENT_SELECT_ATTR) {\n            selectAttr = attr.value;\n        }\n        else if (lcAttrName == LINK_STYLE_HREF_ATTR) {\n            hrefAttr = attr.value;\n        }\n        else if (lcAttrName == LINK_STYLE_REL_ATTR) {\n            relAttr = attr.value;\n        }\n        else if (attr.name == NG_NON_BINDABLE_ATTR) {\n            nonBindable = true;\n        }\n        else if (attr.name == NG_PROJECT_AS) {\n            if (attr.value.length > 0) {\n                projectAs = attr.value;\n            }\n        }\n    });\n    selectAttr = normalizeNgContentSelect(selectAttr);\n    const nodeName = ast.name.toLowerCase();\n    let type = PreparsedElementType.OTHER;\n    if (isNgContent(nodeName)) {\n        type = PreparsedElementType.NG_CONTENT;\n    }\n    else if (nodeName == STYLE_ELEMENT) {\n        type = PreparsedElementType.STYLE;\n    }\n    else if (nodeName == SCRIPT_ELEMENT) {\n        type = PreparsedElementType.SCRIPT;\n    }\n    else if (nodeName == LINK_ELEMENT && relAttr == LINK_STYLE_REL_VALUE) {\n        type = PreparsedElementType.STYLESHEET;\n    }\n    return new PreparsedElement(type, selectAttr, hrefAttr, nonBindable, projectAs);\n}\nvar PreparsedElementType;\n(function (PreparsedElementType) {\n    PreparsedElementType[PreparsedElementType[\"NG_CONTENT\"] = 0] = \"NG_CONTENT\";\n    PreparsedElementType[PreparsedElementType[\"STYLE\"] = 1] = \"STYLE\";\n    PreparsedElementType[PreparsedElementType[\"STYLESHEET\"] = 2] = \"STYLESHEET\";\n    PreparsedElementType[PreparsedElementType[\"SCRIPT\"] = 3] = \"SCRIPT\";\n    PreparsedElementType[PreparsedElementType[\"OTHER\"] = 4] = \"OTHER\";\n})(PreparsedElementType || (PreparsedElementType = {}));\nclass PreparsedElement {\n    constructor(type, selectAttr, hrefAttr, nonBindable, projectAs) {\n        this.type = type;\n        this.selectAttr = selectAttr;\n        this.hrefAttr = hrefAttr;\n        this.nonBindable = nonBindable;\n        this.projectAs = projectAs;\n    }\n}\nfunction normalizeNgContentSelect(selectAttr) {\n    if (selectAttr === null || selectAttr.length === 0) {\n        return '*';\n    }\n    return selectAttr;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst BIND_NAME_REGEXP = /^(?:(?:(?:(bind-)|(let-)|(ref-|#)|(on-)|(bindon-)|(@))(.*))|\\[\\(([^\\)]+)\\)\\]|\\[([^\\]]+)\\]|\\(([^\\)]+)\\))$/;\n// Group 1 = \"bind-\"\nconst KW_BIND_IDX = 1;\n// Group 2 = \"let-\"\nconst KW_LET_IDX = 2;\n// Group 3 = \"ref-/#\"\nconst KW_REF_IDX = 3;\n// Group 4 = \"on-\"\nconst KW_ON_IDX = 4;\n// Group 5 = \"bindon-\"\nconst KW_BINDON_IDX = 5;\n// Group 6 = \"@\"\nconst KW_AT_IDX = 6;\n// Group 7 = the identifier after \"bind-\", \"let-\", \"ref-/#\", \"on-\", \"bindon-\" or \"@\"\nconst IDENT_KW_IDX = 7;\n// Group 8 = identifier inside [()]\nconst IDENT_BANANA_BOX_IDX = 8;\n// Group 9 = identifier inside []\nconst IDENT_PROPERTY_IDX = 9;\n// Group 10 = identifier inside ()\nconst IDENT_EVENT_IDX = 10;\nconst TEMPLATE_ATTR_PREFIX$1 = '*';\nconst CLASS_ATTR = 'class';\nlet _TEXT_CSS_SELECTOR;\nfunction TEXT_CSS_SELECTOR() {\n    if (!_TEXT_CSS_SELECTOR) {\n        _TEXT_CSS_SELECTOR = CssSelector.parse('*')[0];\n    }\n    return _TEXT_CSS_SELECTOR;\n}\nclass TemplateParseError extends ParseError {\n    constructor(message, span, level) {\n        super(span, message, level);\n    }\n}\nclass TemplateParseResult {\n    constructor(templateAst, usedPipes, errors) {\n        this.templateAst = templateAst;\n        this.usedPipes = usedPipes;\n        this.errors = errors;\n    }\n}\nclass TemplateParser {\n    constructor(_config, _reflector, _exprParser, _schemaRegistry, _htmlParser, _console, transforms) {\n        this._config = _config;\n        this._reflector = _reflector;\n        this._exprParser = _exprParser;\n        this._schemaRegistry = _schemaRegistry;\n        this._htmlParser = _htmlParser;\n        this._console = _console;\n        this.transforms = transforms;\n    }\n    get expressionParser() {\n        return this._exprParser;\n    }\n    parse(component, template, directives, pipes, schemas, templateUrl, preserveWhitespaces) {\n        var _a;\n        const result = this.tryParse(component, template, directives, pipes, schemas, templateUrl, preserveWhitespaces);\n        const warnings = result.errors.filter(error => error.level === ParseErrorLevel.WARNING);\n        const errors = result.errors.filter(error => error.level === ParseErrorLevel.ERROR);\n        if (warnings.length > 0) {\n            (_a = this._console) === null || _a === void 0 ? void 0 : _a.warn(`Template parse warnings:\\n${warnings.join('\\n')}`);\n        }\n        if (errors.length > 0) {\n            const errorString = errors.join('\\n');\n            throw syntaxError(`Template parse errors:\\n${errorString}`, errors);\n        }\n        return { template: result.templateAst, pipes: result.usedPipes };\n    }\n    tryParse(component, template, directives, pipes, schemas, templateUrl, preserveWhitespaces) {\n        let htmlParseResult = typeof template === 'string' ?\n            this._htmlParser.parse(template, templateUrl, {\n                tokenizeExpansionForms: true,\n                interpolationConfig: this.getInterpolationConfig(component)\n            }) :\n            template;\n        if (!preserveWhitespaces) {\n            htmlParseResult = removeWhitespaces(htmlParseResult);\n        }\n        return this.tryParseHtml(this.expandHtml(htmlParseResult), component, directives, pipes, schemas);\n    }\n    tryParseHtml(htmlAstWithErrors, component, directives, pipes, schemas) {\n        let result;\n        const errors = htmlAstWithErrors.errors;\n        const usedPipes = [];\n        if (htmlAstWithErrors.rootNodes.length > 0) {\n            const uniqDirectives = removeSummaryDuplicates(directives);\n            const uniqPipes = removeSummaryDuplicates(pipes);\n            const providerViewContext = new ProviderViewContext(this._reflector, component);\n            let interpolationConfig = undefined;\n            if (component.template && component.template.interpolation) {\n                interpolationConfig = {\n                    start: component.template.interpolation[0],\n                    end: component.template.interpolation[1]\n                };\n            }\n            const bindingParser = new BindingParser(this._exprParser, interpolationConfig, this._schemaRegistry, uniqPipes, errors);\n            const parseVisitor = new TemplateParseVisitor(this._reflector, this._config, providerViewContext, uniqDirectives, bindingParser, this._schemaRegistry, schemas, errors);\n            result = visitAll$1(parseVisitor, htmlAstWithErrors.rootNodes, EMPTY_ELEMENT_CONTEXT);\n            errors.push(...providerViewContext.errors);\n            usedPipes.push(...bindingParser.getUsedPipes());\n        }\n        else {\n            result = [];\n        }\n        this._assertNoReferenceDuplicationOnTemplate(result, errors);\n        if (errors.length > 0) {\n            return new TemplateParseResult(result, usedPipes, errors);\n        }\n        if (this.transforms) {\n            this.transforms.forEach((transform) => {\n                result = templateVisitAll(transform, result);\n            });\n        }\n        return new TemplateParseResult(result, usedPipes, errors);\n    }\n    expandHtml(htmlAstWithErrors, forced = false) {\n        const errors = htmlAstWithErrors.errors;\n        if (errors.length == 0 || forced) {\n            // Transform ICU messages to angular directives\n            const expandedHtmlAst = expandNodes(htmlAstWithErrors.rootNodes);\n            errors.push(...expandedHtmlAst.errors);\n            htmlAstWithErrors = new ParseTreeResult(expandedHtmlAst.nodes, errors);\n        }\n        return htmlAstWithErrors;\n    }\n    getInterpolationConfig(component) {\n        if (component.template) {\n            return InterpolationConfig.fromArray(component.template.interpolation);\n        }\n        return undefined;\n    }\n    /** @internal */\n    _assertNoReferenceDuplicationOnTemplate(result, errors) {\n        const existingReferences = [];\n        result.filter(element => !!element.references)\n            .forEach(element => element.references.forEach((reference) => {\n            const name = reference.name;\n            if (existingReferences.indexOf(name) < 0) {\n                existingReferences.push(name);\n            }\n            else {\n                const error = new TemplateParseError(`Reference \"#${name}\" is defined several times`, reference.sourceSpan, ParseErrorLevel.ERROR);\n                errors.push(error);\n            }\n        }));\n    }\n}\nclass TemplateParseVisitor {\n    constructor(reflector, config, providerViewContext, directives, _bindingParser, _schemaRegistry, _schemas, _targetErrors) {\n        this.reflector = reflector;\n        this.config = config;\n        this.providerViewContext = providerViewContext;\n        this._bindingParser = _bindingParser;\n        this._schemaRegistry = _schemaRegistry;\n        this._schemas = _schemas;\n        this._targetErrors = _targetErrors;\n        this.selectorMatcher = new SelectorMatcher();\n        this.directivesIndex = new Map();\n        this.ngContentCount = 0;\n        // Note: queries start with id 1 so we can use the number in a Bloom filter!\n        this.contentQueryStartId = providerViewContext.component.viewQueries.length + 1;\n        directives.forEach((directive, index) => {\n            const selector = CssSelector.parse(directive.selector);\n            this.selectorMatcher.addSelectables(selector, directive);\n            this.directivesIndex.set(directive, index);\n        });\n    }\n    visitExpansion(expansion, context) {\n        return null;\n    }\n    visitExpansionCase(expansionCase, context) {\n        return null;\n    }\n    visitText(text, parent) {\n        const ngContentIndex = parent.findNgContentIndex(TEXT_CSS_SELECTOR());\n        const valueNoNgsp = replaceNgsp(text.value);\n        const expr = this._bindingParser.parseInterpolation(valueNoNgsp, text.sourceSpan);\n        return expr ? new BoundTextAst(expr, ngContentIndex, text.sourceSpan) :\n            new TextAst(valueNoNgsp, ngContentIndex, text.sourceSpan);\n    }\n    visitAttribute(attribute, context) {\n        return new AttrAst(attribute.name, attribute.value, attribute.sourceSpan);\n    }\n    visitComment(comment, context) {\n        return null;\n    }\n    visitElement(element, parent) {\n        const queryStartIndex = this.contentQueryStartId;\n        const elName = element.name;\n        const preparsedElement = preparseElement(element);\n        if (preparsedElement.type === PreparsedElementType.SCRIPT ||\n            preparsedElement.type === PreparsedElementType.STYLE) {\n            // Skipping <script> for security reasons\n            // Skipping <style> as we already processed them\n            // in the StyleCompiler\n            return null;\n        }\n        if (preparsedElement.type === PreparsedElementType.STYLESHEET &&\n            isStyleUrlResolvable(preparsedElement.hrefAttr)) {\n            // Skipping stylesheets with either relative urls or package scheme as we already processed\n            // them in the StyleCompiler\n            return null;\n        }\n        const matchableAttrs = [];\n        const elementOrDirectiveProps = [];\n        const elementOrDirectiveRefs = [];\n        const elementVars = [];\n        const events = [];\n        const templateElementOrDirectiveProps = [];\n        const templateMatchableAttrs = [];\n        const templateElementVars = [];\n        let hasInlineTemplates = false;\n        const attrs = [];\n        const isTemplateElement = isNgTemplate(element.name);\n        element.attrs.forEach(attr => {\n            const parsedVariables = [];\n            const hasBinding = this._parseAttr(isTemplateElement, attr, matchableAttrs, elementOrDirectiveProps, events, elementOrDirectiveRefs, elementVars);\n            elementVars.push(...parsedVariables.map(v => VariableAst.fromParsedVariable(v)));\n            let templateValue;\n            let templateKey;\n            const normalizedName = this._normalizeAttributeName(attr.name);\n            if (normalizedName.startsWith(TEMPLATE_ATTR_PREFIX$1)) {\n                templateValue = attr.value;\n                templateKey = normalizedName.substring(TEMPLATE_ATTR_PREFIX$1.length);\n            }\n            const hasTemplateBinding = templateValue != null;\n            if (hasTemplateBinding) {\n                if (hasInlineTemplates) {\n                    this._reportError(`Can't have multiple template bindings on one element. Use only one attribute prefixed with *`, attr.sourceSpan);\n                }\n                hasInlineTemplates = true;\n                const parsedVariables = [];\n                const absoluteOffset = (attr.valueSpan || attr.sourceSpan).start.offset;\n                this._bindingParser.parseInlineTemplateBinding(templateKey, templateValue, attr.sourceSpan, absoluteOffset, templateMatchableAttrs, templateElementOrDirectiveProps, parsedVariables);\n                templateElementVars.push(...parsedVariables.map(v => VariableAst.fromParsedVariable(v)));\n            }\n            if (!hasBinding && !hasTemplateBinding) {\n                // don't include the bindings as attributes as well in the AST\n                attrs.push(this.visitAttribute(attr, null));\n                matchableAttrs.push([attr.name, attr.value]);\n            }\n        });\n        const elementCssSelector = createElementCssSelector(elName, matchableAttrs);\n        const { directives: directiveMetas, matchElement } = this._parseDirectives(this.selectorMatcher, elementCssSelector);\n        const references = [];\n        const boundDirectivePropNames = new Set();\n        const directiveAsts = this._createDirectiveAsts(isTemplateElement, element.name, directiveMetas, elementOrDirectiveProps, elementOrDirectiveRefs, element.sourceSpan, references, boundDirectivePropNames);\n        const elementProps = this._createElementPropertyAsts(element.name, elementOrDirectiveProps, boundDirectivePropNames);\n        const isViewRoot = parent.isTemplateElement || hasInlineTemplates;\n        const providerContext = new ProviderElementContext(this.providerViewContext, parent.providerContext, isViewRoot, directiveAsts, attrs, references, isTemplateElement, queryStartIndex, element.sourceSpan);\n        const children = visitAll$1(preparsedElement.nonBindable ? NON_BINDABLE_VISITOR : this, element.children, ElementContext.create(isTemplateElement, directiveAsts, isTemplateElement ? parent.providerContext : providerContext));\n        providerContext.afterElement();\n        // Override the actual selector when the `ngProjectAs` attribute is provided\n        const projectionSelector = preparsedElement.projectAs != '' ?\n            CssSelector.parse(preparsedElement.projectAs)[0] :\n            elementCssSelector;\n        const ngContentIndex = parent.findNgContentIndex(projectionSelector);\n        let parsedElement;\n        if (preparsedElement.type === PreparsedElementType.NG_CONTENT) {\n            // `<ng-content>` element\n            if (element.children && !element.children.every(_isEmptyTextNode)) {\n                this._reportError(`<ng-content> element cannot have content.`, element.sourceSpan);\n            }\n            parsedElement = new NgContentAst(this.ngContentCount++, hasInlineTemplates ? null : ngContentIndex, element.sourceSpan);\n        }\n        else if (isTemplateElement) {\n            // `<ng-template>` element\n            this._assertAllEventsPublishedByDirectives(directiveAsts, events);\n            this._assertNoComponentsNorElementBindingsOnTemplate(directiveAsts, elementProps, element.sourceSpan);\n            parsedElement = new EmbeddedTemplateAst(attrs, events, references, elementVars, providerContext.transformedDirectiveAsts, providerContext.transformProviders, providerContext.transformedHasViewContainer, providerContext.queryMatches, children, hasInlineTemplates ? null : ngContentIndex, element.sourceSpan);\n        }\n        else {\n            // element other than `<ng-content>` and `<ng-template>`\n            this._assertElementExists(matchElement, element);\n            this._assertOnlyOneComponent(directiveAsts, element.sourceSpan);\n            const ngContentIndex = hasInlineTemplates ? null : parent.findNgContentIndex(projectionSelector);\n            parsedElement = new ElementAst(elName, attrs, elementProps, events, references, providerContext.transformedDirectiveAsts, providerContext.transformProviders, providerContext.transformedHasViewContainer, providerContext.queryMatches, children, hasInlineTemplates ? null : ngContentIndex, element.sourceSpan, element.endSourceSpan || null);\n        }\n        if (hasInlineTemplates) {\n            // The element as a *-attribute\n            const templateQueryStartIndex = this.contentQueryStartId;\n            const templateSelector = createElementCssSelector('ng-template', templateMatchableAttrs);\n            const { directives } = this._parseDirectives(this.selectorMatcher, templateSelector);\n            const templateBoundDirectivePropNames = new Set();\n            const templateDirectiveAsts = this._createDirectiveAsts(true, elName, directives, templateElementOrDirectiveProps, [], element.sourceSpan, [], templateBoundDirectivePropNames);\n            const templateElementProps = this._createElementPropertyAsts(elName, templateElementOrDirectiveProps, templateBoundDirectivePropNames);\n            this._assertNoComponentsNorElementBindingsOnTemplate(templateDirectiveAsts, templateElementProps, element.sourceSpan);\n            const templateProviderContext = new ProviderElementContext(this.providerViewContext, parent.providerContext, parent.isTemplateElement, templateDirectiveAsts, [], [], true, templateQueryStartIndex, element.sourceSpan);\n            templateProviderContext.afterElement();\n            parsedElement = new EmbeddedTemplateAst([], [], [], templateElementVars, templateProviderContext.transformedDirectiveAsts, templateProviderContext.transformProviders, templateProviderContext.transformedHasViewContainer, templateProviderContext.queryMatches, [parsedElement], ngContentIndex, element.sourceSpan);\n        }\n        return parsedElement;\n    }\n    _parseAttr(isTemplateElement, attr, targetMatchableAttrs, targetProps, targetEvents, targetRefs, targetVars) {\n        const name = this._normalizeAttributeName(attr.name);\n        const value = attr.value;\n        const srcSpan = attr.sourceSpan;\n        const absoluteOffset = attr.valueSpan ? attr.valueSpan.start.offset : srcSpan.start.offset;\n        const boundEvents = [];\n        const bindParts = name.match(BIND_NAME_REGEXP);\n        let hasBinding = false;\n        if (bindParts !== null) {\n            hasBinding = true;\n            if (bindParts[KW_BIND_IDX] != null) {\n                this._bindingParser.parsePropertyBinding(bindParts[IDENT_KW_IDX], value, false, srcSpan, absoluteOffset, attr.valueSpan, targetMatchableAttrs, targetProps);\n            }\n            else if (bindParts[KW_LET_IDX]) {\n                if (isTemplateElement) {\n                    const identifier = bindParts[IDENT_KW_IDX];\n                    this._parseVariable(identifier, value, srcSpan, targetVars);\n                }\n                else {\n                    this._reportError(`\"let-\" is only supported on ng-template elements.`, srcSpan);\n                }\n            }\n            else if (bindParts[KW_REF_IDX]) {\n                const identifier = bindParts[IDENT_KW_IDX];\n                this._parseReference(identifier, value, srcSpan, targetRefs);\n            }\n            else if (bindParts[KW_ON_IDX]) {\n                this._bindingParser.parseEvent(bindParts[IDENT_KW_IDX], value, srcSpan, attr.valueSpan || srcSpan, targetMatchableAttrs, boundEvents);\n            }\n            else if (bindParts[KW_BINDON_IDX]) {\n                this._bindingParser.parsePropertyBinding(bindParts[IDENT_KW_IDX], value, false, srcSpan, absoluteOffset, attr.valueSpan, targetMatchableAttrs, targetProps);\n                this._parseAssignmentEvent(bindParts[IDENT_KW_IDX], value, srcSpan, attr.valueSpan || srcSpan, targetMatchableAttrs, boundEvents);\n            }\n            else if (bindParts[KW_AT_IDX]) {\n                this._bindingParser.parseLiteralAttr(name, value, srcSpan, absoluteOffset, attr.valueSpan, targetMatchableAttrs, targetProps);\n            }\n            else if (bindParts[IDENT_BANANA_BOX_IDX]) {\n                this._bindingParser.parsePropertyBinding(bindParts[IDENT_BANANA_BOX_IDX], value, false, srcSpan, absoluteOffset, attr.valueSpan, targetMatchableAttrs, targetProps);\n                this._parseAssignmentEvent(bindParts[IDENT_BANANA_BOX_IDX], value, srcSpan, attr.valueSpan || srcSpan, targetMatchableAttrs, boundEvents);\n            }\n            else if (bindParts[IDENT_PROPERTY_IDX]) {\n                this._bindingParser.parsePropertyBinding(bindParts[IDENT_PROPERTY_IDX], value, false, srcSpan, absoluteOffset, attr.valueSpan, targetMatchableAttrs, targetProps);\n            }\n            else if (bindParts[IDENT_EVENT_IDX]) {\n                this._bindingParser.parseEvent(bindParts[IDENT_EVENT_IDX], value, srcSpan, attr.valueSpan || srcSpan, targetMatchableAttrs, boundEvents);\n            }\n        }\n        else {\n            hasBinding = this._bindingParser.parsePropertyInterpolation(name, value, srcSpan, attr.valueSpan, targetMatchableAttrs, targetProps);\n        }\n        if (!hasBinding) {\n            this._bindingParser.parseLiteralAttr(name, value, srcSpan, absoluteOffset, attr.valueSpan, targetMatchableAttrs, targetProps);\n        }\n        targetEvents.push(...boundEvents.map(e => BoundEventAst.fromParsedEvent(e)));\n        return hasBinding;\n    }\n    _normalizeAttributeName(attrName) {\n        return /^data-/i.test(attrName) ? attrName.substring(5) : attrName;\n    }\n    _parseVariable(identifier, value, sourceSpan, targetVars) {\n        if (identifier.indexOf('-') > -1) {\n            this._reportError(`\"-\" is not allowed in variable names`, sourceSpan);\n        }\n        else if (identifier.length === 0) {\n            this._reportError(`Variable does not have a name`, sourceSpan);\n        }\n        targetVars.push(new VariableAst(identifier, value, sourceSpan));\n    }\n    _parseReference(identifier, value, sourceSpan, targetRefs) {\n        if (identifier.indexOf('-') > -1) {\n            this._reportError(`\"-\" is not allowed in reference names`, sourceSpan);\n        }\n        else if (identifier.length === 0) {\n            this._reportError(`Reference does not have a name`, sourceSpan);\n        }\n        targetRefs.push(new ElementOrDirectiveRef(identifier, value, sourceSpan));\n    }\n    _parseAssignmentEvent(name, expression, sourceSpan, valueSpan, targetMatchableAttrs, targetEvents) {\n        this._bindingParser.parseEvent(`${name}Change`, `${expression}=$event`, sourceSpan, valueSpan, targetMatchableAttrs, targetEvents);\n    }\n    _parseDirectives(selectorMatcher, elementCssSelector) {\n        // Need to sort the directives so that we get consistent results throughout,\n        // as selectorMatcher uses Maps inside.\n        // Also deduplicate directives as they might match more than one time!\n        const directives = newArray(this.directivesIndex.size);\n        // Whether any directive selector matches on the element name\n        let matchElement = false;\n        selectorMatcher.match(elementCssSelector, (selector, directive) => {\n            directives[this.directivesIndex.get(directive)] = directive;\n            matchElement = matchElement || selector.hasElementSelector();\n        });\n        return {\n            directives: directives.filter(dir => !!dir),\n            matchElement,\n        };\n    }\n    _createDirectiveAsts(isTemplateElement, elementName, directives, props, elementOrDirectiveRefs, elementSourceSpan, targetReferences, targetBoundDirectivePropNames) {\n        const matchedReferences = new Set();\n        let component = null;\n        const directiveAsts = directives.map((directive) => {\n            const sourceSpan = new ParseSourceSpan(elementSourceSpan.start, elementSourceSpan.end, `Directive ${identifierName(directive.type)}`);\n            if (directive.isComponent) {\n                component = directive;\n            }\n            const directiveProperties = [];\n            const boundProperties = this._bindingParser.createDirectiveHostPropertyAsts(directive, elementName, sourceSpan);\n            let hostProperties = boundProperties.map(prop => BoundElementPropertyAst.fromBoundProperty(prop));\n            // Note: We need to check the host properties here as well,\n            // as we don't know the element name in the DirectiveWrapperCompiler yet.\n            hostProperties = this._checkPropertiesInSchema(elementName, hostProperties);\n            const parsedEvents = this._bindingParser.createDirectiveHostEventAsts(directive, sourceSpan);\n            this._createDirectivePropertyAsts(directive.inputs, props, directiveProperties, targetBoundDirectivePropNames);\n            elementOrDirectiveRefs.forEach((elOrDirRef) => {\n                if ((elOrDirRef.value.length === 0 && directive.isComponent) ||\n                    (elOrDirRef.isReferenceToDirective(directive))) {\n                    targetReferences.push(new ReferenceAst(elOrDirRef.name, createTokenForReference(directive.type.reference), elOrDirRef.value, elOrDirRef.sourceSpan));\n                    matchedReferences.add(elOrDirRef.name);\n                }\n            });\n            const hostEvents = parsedEvents.map(e => BoundEventAst.fromParsedEvent(e));\n            const contentQueryStartId = this.contentQueryStartId;\n            this.contentQueryStartId += directive.queries.length;\n            return new DirectiveAst(directive, directiveProperties, hostProperties, hostEvents, contentQueryStartId, sourceSpan);\n        });\n        elementOrDirectiveRefs.forEach((elOrDirRef) => {\n            if (elOrDirRef.value.length > 0) {\n                if (!matchedReferences.has(elOrDirRef.name)) {\n                    this._reportError(`There is no directive with \"exportAs\" set to \"${elOrDirRef.value}\"`, elOrDirRef.sourceSpan);\n                }\n            }\n            else if (!component) {\n                let refToken = null;\n                if (isTemplateElement) {\n                    refToken = createTokenForExternalReference(this.reflector, Identifiers.TemplateRef);\n                }\n                targetReferences.push(new ReferenceAst(elOrDirRef.name, refToken, elOrDirRef.value, elOrDirRef.sourceSpan));\n            }\n        });\n        return directiveAsts;\n    }\n    _createDirectivePropertyAsts(directiveProperties, boundProps, targetBoundDirectiveProps, targetBoundDirectivePropNames) {\n        if (directiveProperties) {\n            const boundPropsByName = new Map();\n            boundProps.forEach(boundProp => {\n                const prevValue = boundPropsByName.get(boundProp.name);\n                if (!prevValue || prevValue.isLiteral) {\n                    // give [a]=\"b\" a higher precedence than a=\"b\" on the same element\n                    boundPropsByName.set(boundProp.name, boundProp);\n                }\n            });\n            Object.keys(directiveProperties).forEach(dirProp => {\n                const elProp = directiveProperties[dirProp];\n                const boundProp = boundPropsByName.get(elProp);\n                // Bindings are optional, so this binding only needs to be set up if an expression is given.\n                if (boundProp) {\n                    targetBoundDirectivePropNames.add(boundProp.name);\n                    if (!isEmptyExpression(boundProp.expression)) {\n                        targetBoundDirectiveProps.push(new BoundDirectivePropertyAst(dirProp, boundProp.name, boundProp.expression, boundProp.sourceSpan));\n                    }\n                }\n            });\n        }\n    }\n    _createElementPropertyAsts(elementName, props, boundDirectivePropNames) {\n        const boundElementProps = [];\n        props.forEach((prop) => {\n            if (!prop.isLiteral && !boundDirectivePropNames.has(prop.name)) {\n                const boundProp = this._bindingParser.createBoundElementProperty(elementName, prop);\n                boundElementProps.push(BoundElementPropertyAst.fromBoundProperty(boundProp));\n            }\n        });\n        return this._checkPropertiesInSchema(elementName, boundElementProps);\n    }\n    _findComponentDirectives(directives) {\n        return directives.filter(directive => directive.directive.isComponent);\n    }\n    _findComponentDirectiveNames(directives) {\n        return this._findComponentDirectives(directives)\n            .map(directive => identifierName(directive.directive.type));\n    }\n    _assertOnlyOneComponent(directives, sourceSpan) {\n        const componentTypeNames = this._findComponentDirectiveNames(directives);\n        if (componentTypeNames.length > 1) {\n            this._reportError(`More than one component matched on this element.\\n` +\n                `Make sure that only one component's selector can match a given element.\\n` +\n                `Conflicting components: ${componentTypeNames.join(',')}`, sourceSpan);\n        }\n    }\n    /**\n     * Make sure that non-angular tags conform to the schemas.\n     *\n     * Note: An element is considered an angular tag when at least one directive selector matches the\n     * tag name.\n     *\n     * @param matchElement Whether any directive has matched on the tag name\n     * @param element the html element\n     */\n    _assertElementExists(matchElement, element) {\n        const elName = element.name.replace(/^:xhtml:/, '');\n        if (!matchElement && !this._schemaRegistry.hasElement(elName, this._schemas)) {\n            let errorMsg = `'${elName}' is not a known element:\\n`;\n            errorMsg += `1. If '${elName}' is an Angular component, then verify that it is part of this module.\\n`;\n            if (elName.indexOf('-') > -1) {\n                errorMsg += `2. If '${elName}' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message.`;\n            }\n            else {\n                errorMsg +=\n                    `2. To allow any element add 'NO_ERRORS_SCHEMA' to the '@NgModule.schemas' of this component.`;\n            }\n            this._reportError(errorMsg, element.sourceSpan);\n        }\n    }\n    _assertNoComponentsNorElementBindingsOnTemplate(directives, elementProps, sourceSpan) {\n        const componentTypeNames = this._findComponentDirectiveNames(directives);\n        if (componentTypeNames.length > 0) {\n            this._reportError(`Components on an embedded template: ${componentTypeNames.join(',')}`, sourceSpan);\n        }\n        elementProps.forEach(prop => {\n            this._reportError(`Property binding ${prop.name} not used by any directive on an embedded template. Make sure that the property name is spelled correctly and all directives are listed in the \"@NgModule.declarations\".`, sourceSpan);\n        });\n    }\n    _assertAllEventsPublishedByDirectives(directives, events) {\n        const allDirectiveEvents = new Set();\n        directives.forEach(directive => {\n            Object.keys(directive.directive.outputs).forEach(k => {\n                const eventName = directive.directive.outputs[k];\n                allDirectiveEvents.add(eventName);\n            });\n        });\n        events.forEach(event => {\n            if (event.target != null || !allDirectiveEvents.has(event.name)) {\n                this._reportError(`Event binding ${event\n                    .fullName} not emitted by any directive on an embedded template. Make sure that the event name is spelled correctly and all directives are listed in the \"@NgModule.declarations\".`, event.sourceSpan);\n            }\n        });\n    }\n    _checkPropertiesInSchema(elementName, boundProps) {\n        // Note: We can't filter out empty expressions before this method,\n        // as we still want to validate them!\n        return boundProps.filter((boundProp) => {\n            if (boundProp.type === 0 /* Property */ &&\n                !this._schemaRegistry.hasProperty(elementName, boundProp.name, this._schemas)) {\n                let errorMsg = `Can't bind to '${boundProp.name}' since it isn't a known property of '${elementName}'.`;\n                if (elementName.startsWith('ng-')) {\n                    errorMsg +=\n                        `\\n1. If '${boundProp\n                            .name}' is an Angular directive, then add 'CommonModule' to the '@NgModule.imports' of this component.` +\n                            `\\n2. To allow any property add 'NO_ERRORS_SCHEMA' to the '@NgModule.schemas' of this component.`;\n                }\n                else if (elementName.indexOf('-') > -1) {\n                    errorMsg +=\n                        `\\n1. If '${elementName}' is an Angular component and it has '${boundProp.name}' input, then verify that it is part of this module.` +\n                            `\\n2. If '${elementName}' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message.` +\n                            `\\n3. To allow any property add 'NO_ERRORS_SCHEMA' to the '@NgModule.schemas' of this component.`;\n                }\n                this._reportError(errorMsg, boundProp.sourceSpan);\n            }\n            return !isEmptyExpression(boundProp.value);\n        });\n    }\n    _reportError(message, sourceSpan, level = ParseErrorLevel.ERROR) {\n        this._targetErrors.push(new ParseError(sourceSpan, message, level));\n    }\n}\nclass NonBindableVisitor {\n    visitElement(ast, parent) {\n        const preparsedElement = preparseElement(ast);\n        if (preparsedElement.type === PreparsedElementType.SCRIPT ||\n            preparsedElement.type === PreparsedElementType.STYLE ||\n            preparsedElement.type === PreparsedElementType.STYLESHEET) {\n            // Skipping <script> for security reasons\n            // Skipping <style> and stylesheets as we already processed them\n            // in the StyleCompiler\n            return null;\n        }\n        const attrNameAndValues = ast.attrs.map((attr) => [attr.name, attr.value]);\n        const selector = createElementCssSelector(ast.name, attrNameAndValues);\n        const ngContentIndex = parent.findNgContentIndex(selector);\n        const children = visitAll$1(this, ast.children, EMPTY_ELEMENT_CONTEXT);\n        return new ElementAst(ast.name, visitAll$1(this, ast.attrs), [], [], [], [], [], false, [], children, ngContentIndex, ast.sourceSpan, ast.endSourceSpan);\n    }\n    visitComment(comment, context) {\n        return null;\n    }\n    visitAttribute(attribute, context) {\n        return new AttrAst(attribute.name, attribute.value, attribute.sourceSpan);\n    }\n    visitText(text, parent) {\n        const ngContentIndex = parent.findNgContentIndex(TEXT_CSS_SELECTOR());\n        return new TextAst(text.value, ngContentIndex, text.sourceSpan);\n    }\n    visitExpansion(expansion, context) {\n        return expansion;\n    }\n    visitExpansionCase(expansionCase, context) {\n        return expansionCase;\n    }\n}\n/**\n * A reference to an element or directive in a template. E.g., the reference in this template:\n *\n * <div #myMenu=\"coolMenu\">\n *\n * would be {name: 'myMenu', value: 'coolMenu', sourceSpan: ...}\n */\nclass ElementOrDirectiveRef {\n    constructor(name, value, sourceSpan) {\n        this.name = name;\n        this.value = value;\n        this.sourceSpan = sourceSpan;\n    }\n    /** Gets whether this is a reference to the given directive. */\n    isReferenceToDirective(directive) {\n        return splitExportAs(directive.exportAs).indexOf(this.value) !== -1;\n    }\n}\n/** Splits a raw, potentially comma-delimited `exportAs` value into an array of names. */\nfunction splitExportAs(exportAs) {\n    return exportAs ? exportAs.split(',').map(e => e.trim()) : [];\n}\nfunction splitClasses(classAttrValue) {\n    return classAttrValue.trim().split(/\\s+/g);\n}\nclass ElementContext {\n    constructor(isTemplateElement, _ngContentIndexMatcher, _wildcardNgContentIndex, providerContext) {\n        this.isTemplateElement = isTemplateElement;\n        this._ngContentIndexMatcher = _ngContentIndexMatcher;\n        this._wildcardNgContentIndex = _wildcardNgContentIndex;\n        this.providerContext = providerContext;\n    }\n    static create(isTemplateElement, directives, providerContext) {\n        const matcher = new SelectorMatcher();\n        let wildcardNgContentIndex = null;\n        const component = directives.find(directive => directive.directive.isComponent);\n        if (component) {\n            const ngContentSelectors = component.directive.template.ngContentSelectors;\n            for (let i = 0; i < ngContentSelectors.length; i++) {\n                const selector = ngContentSelectors[i];\n                if (selector === '*') {\n                    wildcardNgContentIndex = i;\n                }\n                else {\n                    matcher.addSelectables(CssSelector.parse(ngContentSelectors[i]), i);\n                }\n            }\n        }\n        return new ElementContext(isTemplateElement, matcher, wildcardNgContentIndex, providerContext);\n    }\n    findNgContentIndex(selector) {\n        const ngContentIndices = [];\n        this._ngContentIndexMatcher.match(selector, (selector, ngContentIndex) => {\n            ngContentIndices.push(ngContentIndex);\n        });\n        ngContentIndices.sort();\n        if (this._wildcardNgContentIndex != null) {\n            ngContentIndices.push(this._wildcardNgContentIndex);\n        }\n        return ngContentIndices.length > 0 ? ngContentIndices[0] : null;\n    }\n}\nfunction createElementCssSelector(elementName, attributes) {\n    const cssSelector = new CssSelector();\n    const elNameNoNs = splitNsName(elementName)[1];\n    cssSelector.setElement(elNameNoNs);\n    for (let i = 0; i < attributes.length; i++) {\n        const attrName = attributes[i][0];\n        const attrNameNoNs = splitNsName(attrName)[1];\n        const attrValue = attributes[i][1];\n        cssSelector.addAttribute(attrNameNoNs, attrValue);\n        if (attrName.toLowerCase() == CLASS_ATTR) {\n            const classes = splitClasses(attrValue);\n            classes.forEach(className => cssSelector.addClassName(className));\n        }\n    }\n    return cssSelector;\n}\nconst EMPTY_ELEMENT_CONTEXT = new ElementContext(true, new SelectorMatcher(), null, null);\nconst NON_BINDABLE_VISITOR = new NonBindableVisitor();\nfunction _isEmptyTextNode(node) {\n    return node instanceof Text$3 && node.value.trim().length == 0;\n}\nfunction removeSummaryDuplicates(items) {\n    const map = new Map();\n    items.forEach((item) => {\n        if (!map.get(item.type.reference)) {\n            map.set(item.type.reference, item);\n        }\n    });\n    return Array.from(map.values());\n}\nfunction isEmptyExpression(ast) {\n    if (ast instanceof ASTWithSource) {\n        ast = ast.ast;\n    }\n    return ast instanceof EmptyExpr;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Parses string representation of a style and converts it into object literal.\n *\n * @param value string representation of style as used in the `style` attribute in HTML.\n *   Example: `color: red; height: auto`.\n * @returns An array of style property name and value pairs, e.g. `['color', 'red', 'height',\n * 'auto']`\n */\nfunction parse(value) {\n    // we use a string array here instead of a string map\n    // because a string-map is not guaranteed to retain the\n    // order of the entries whereas a string array can be\n    // constructed in a [key, value, key, value] format.\n    const styles = [];\n    let i = 0;\n    let parenDepth = 0;\n    let quote = 0 /* QuoteNone */;\n    let valueStart = 0;\n    let propStart = 0;\n    let currentProp = null;\n    let valueHasQuotes = false;\n    while (i < value.length) {\n        const token = value.charCodeAt(i++);\n        switch (token) {\n            case 40 /* OpenParen */:\n                parenDepth++;\n                break;\n            case 41 /* CloseParen */:\n                parenDepth--;\n                break;\n            case 39 /* QuoteSingle */:\n                // valueStart needs to be there since prop values don't\n                // have quotes in CSS\n                valueHasQuotes = valueHasQuotes || valueStart > 0;\n                if (quote === 0 /* QuoteNone */) {\n                    quote = 39 /* QuoteSingle */;\n                }\n                else if (quote === 39 /* QuoteSingle */ && value.charCodeAt(i - 1) !== 92 /* BackSlash */) {\n                    quote = 0 /* QuoteNone */;\n                }\n                break;\n            case 34 /* QuoteDouble */:\n                // same logic as above\n                valueHasQuotes = valueHasQuotes || valueStart > 0;\n                if (quote === 0 /* QuoteNone */) {\n                    quote = 34 /* QuoteDouble */;\n                }\n                else if (quote === 34 /* QuoteDouble */ && value.charCodeAt(i - 1) !== 92 /* BackSlash */) {\n                    quote = 0 /* QuoteNone */;\n                }\n                break;\n            case 58 /* Colon */:\n                if (!currentProp && parenDepth === 0 && quote === 0 /* QuoteNone */) {\n                    currentProp = hyphenate(value.substring(propStart, i - 1).trim());\n                    valueStart = i;\n                }\n                break;\n            case 59 /* Semicolon */:\n                if (currentProp && valueStart > 0 && parenDepth === 0 && quote === 0 /* QuoteNone */) {\n                    const styleVal = value.substring(valueStart, i - 1).trim();\n                    styles.push(currentProp, valueHasQuotes ? stripUnnecessaryQuotes(styleVal) : styleVal);\n                    propStart = i;\n                    valueStart = 0;\n                    currentProp = null;\n                    valueHasQuotes = false;\n                }\n                break;\n        }\n    }\n    if (currentProp && valueStart) {\n        const styleVal = value.substr(valueStart).trim();\n        styles.push(currentProp, valueHasQuotes ? stripUnnecessaryQuotes(styleVal) : styleVal);\n    }\n    return styles;\n}\nfunction stripUnnecessaryQuotes(value) {\n    const qS = value.charCodeAt(0);\n    const qE = value.charCodeAt(value.length - 1);\n    if (qS == qE && (qS == 39 /* QuoteSingle */ || qS == 34 /* QuoteDouble */)) {\n        const tempValue = value.substring(1, value.length - 1);\n        // special case to avoid using a multi-quoted string that was just chomped\n        // (e.g. `font-family: \"Verdana\", \"sans-serif\"`)\n        if (tempValue.indexOf('\\'') == -1 && tempValue.indexOf('\"') == -1) {\n            value = tempValue;\n        }\n    }\n    return value;\n}\nfunction hyphenate(value) {\n    return value\n        .replace(/[a-z][A-Z]/g, v => {\n        return v.charAt(0) + '-' + v.charAt(1);\n    })\n        .toLowerCase();\n}\n\nconst IMPORTANT_FLAG = '!important';\n/**\n * Minimum amount of binding slots required in the runtime for style/class bindings.\n *\n * Styling in Angular uses up two slots in the runtime LView/TData data structures to\n * record binding data, property information and metadata.\n *\n * When a binding is registered it will place the following information in the `LView`:\n *\n * slot 1) binding value\n * slot 2) cached value (all other values collected before it in string form)\n *\n * When a binding is registered it will place the following information in the `TData`:\n *\n * slot 1) prop name\n * slot 2) binding index that points to the previous style/class binding (and some extra config\n * values)\n *\n * Let's imagine we have a binding that looks like so:\n *\n * ```\n * <div [style.width]=\"x\" [style.height]=\"y\">\n * ```\n *\n * Our `LView` and `TData` data-structures look like so:\n *\n * ```typescript\n * LView = [\n *   // ...\n *   x, // value of x\n *   \"width: x\",\n *\n *   y, // value of y\n *   \"width: x; height: y\",\n *   // ...\n * ];\n *\n * TData = [\n *   // ...\n *   \"width\", // binding slot 20\n *   0,\n *\n *   \"height\",\n *   20,\n *   // ...\n * ];\n * ```\n *\n * */\nconst MIN_STYLING_BINDING_SLOTS_REQUIRED = 2;\n/**\n * Produces creation/update instructions for all styling bindings (class and style)\n *\n * It also produces the creation instruction to register all initial styling values\n * (which are all the static class=\"...\" and style=\"...\" attribute values that exist\n * on an element within a template).\n *\n * The builder class below handles producing instructions for the following cases:\n *\n * - Static style/class attributes (style=\"...\" and class=\"...\")\n * - Dynamic style/class map bindings ([style]=\"map\" and [class]=\"map|string\")\n * - Dynamic style/class property bindings ([style.prop]=\"exp\" and [class.name]=\"exp\")\n *\n * Due to the complex relationship of all of these cases, the instructions generated\n * for these attributes/properties/bindings must be done so in the correct order. The\n * order which these must be generated is as follows:\n *\n * if (createMode) {\n *   styling(...)\n * }\n * if (updateMode) {\n *   styleMap(...)\n *   classMap(...)\n *   styleProp(...)\n *   classProp(...)\n * }\n *\n * The creation/update methods within the builder class produce these instructions.\n */\nclass StylingBuilder {\n    constructor(_directiveExpr) {\n        this._directiveExpr = _directiveExpr;\n        /** Whether or not there are any static styling values present */\n        this._hasInitialValues = false;\n        /**\n         *  Whether or not there are any styling bindings present\n         *  (i.e. `[style]`, `[class]`, `[style.prop]` or `[class.name]`)\n         */\n        this.hasBindings = false;\n        this.hasBindingsWithPipes = false;\n        /** the input for [class] (if it exists) */\n        this._classMapInput = null;\n        /** the input for [style] (if it exists) */\n        this._styleMapInput = null;\n        /** an array of each [style.prop] input */\n        this._singleStyleInputs = null;\n        /** an array of each [class.name] input */\n        this._singleClassInputs = null;\n        this._lastStylingInput = null;\n        this._firstStylingInput = null;\n        // maps are used instead of hash maps because a Map will\n        // retain the ordering of the keys\n        /**\n         * Represents the location of each style binding in the template\n         * (e.g. `<div [style.width]=\"w\" [style.height]=\"h\">` implies\n         * that `width=0` and `height=1`)\n         */\n        this._stylesIndex = new Map();\n        /**\n         * Represents the location of each class binding in the template\n         * (e.g. `<div [class.big]=\"b\" [class.hidden]=\"h\">` implies\n         * that `big=0` and `hidden=1`)\n         */\n        this._classesIndex = new Map();\n        this._initialStyleValues = [];\n        this._initialClassValues = [];\n    }\n    /**\n     * Registers a given input to the styling builder to be later used when producing AOT code.\n     *\n     * The code below will only accept the input if it is somehow tied to styling (whether it be\n     * style/class bindings or static style/class attributes).\n     */\n    registerBoundInput(input) {\n        // [attr.style] or [attr.class] are skipped in the code below,\n        // they should not be treated as styling-based bindings since\n        // they are intended to be written directly to the attr and\n        // will therefore skip all style/class resolution that is present\n        // with style=\"\", [style]=\"\" and [style.prop]=\"\", class=\"\",\n        // [class.prop]=\"\". [class]=\"\" assignments\n        let binding = null;\n        let name = input.name;\n        switch (input.type) {\n            case 0 /* Property */:\n                binding = this.registerInputBasedOnName(name, input.value, input.sourceSpan);\n                break;\n            case 3 /* Style */:\n                binding = this.registerStyleInput(name, false, input.value, input.sourceSpan, input.unit);\n                break;\n            case 2 /* Class */:\n                binding = this.registerClassInput(name, false, input.value, input.sourceSpan);\n                break;\n        }\n        return binding ? true : false;\n    }\n    registerInputBasedOnName(name, expression, sourceSpan) {\n        let binding = null;\n        const prefix = name.substring(0, 6);\n        const isStyle = name === 'style' || prefix === 'style.' || prefix === 'style!';\n        const isClass = !isStyle && (name === 'class' || prefix === 'class.' || prefix === 'class!');\n        if (isStyle || isClass) {\n            const isMapBased = name.charAt(5) !== '.'; // style.prop or class.prop makes this a no\n            const property = name.substr(isMapBased ? 5 : 6); // the dot explains why there's a +1\n            if (isStyle) {\n                binding = this.registerStyleInput(property, isMapBased, expression, sourceSpan);\n            }\n            else {\n                binding = this.registerClassInput(property, isMapBased, expression, sourceSpan);\n            }\n        }\n        return binding;\n    }\n    registerStyleInput(name, isMapBased, value, sourceSpan, suffix) {\n        if (isEmptyExpression(value)) {\n            return null;\n        }\n        name = normalizePropName(name);\n        const { property, hasOverrideFlag, suffix: bindingSuffix } = parseProperty(name);\n        suffix = typeof suffix === 'string' && suffix.length !== 0 ? suffix : bindingSuffix;\n        const entry = { name: property, suffix: suffix, value, sourceSpan, hasOverrideFlag };\n        if (isMapBased) {\n            this._styleMapInput = entry;\n        }\n        else {\n            (this._singleStyleInputs = this._singleStyleInputs || []).push(entry);\n            registerIntoMap(this._stylesIndex, property);\n        }\n        this._lastStylingInput = entry;\n        this._firstStylingInput = this._firstStylingInput || entry;\n        this._checkForPipes(value);\n        this.hasBindings = true;\n        return entry;\n    }\n    registerClassInput(name, isMapBased, value, sourceSpan) {\n        if (isEmptyExpression(value)) {\n            return null;\n        }\n        const { property, hasOverrideFlag } = parseProperty(name);\n        const entry = { name: property, value, sourceSpan, hasOverrideFlag, suffix: null };\n        if (isMapBased) {\n            if (this._classMapInput) {\n                throw new Error('[class] and [className] bindings cannot be used on the same element simultaneously');\n            }\n            this._classMapInput = entry;\n        }\n        else {\n            (this._singleClassInputs = this._singleClassInputs || []).push(entry);\n            registerIntoMap(this._classesIndex, property);\n        }\n        this._lastStylingInput = entry;\n        this._firstStylingInput = this._firstStylingInput || entry;\n        this._checkForPipes(value);\n        this.hasBindings = true;\n        return entry;\n    }\n    _checkForPipes(value) {\n        if ((value instanceof ASTWithSource) && (value.ast instanceof BindingPipe)) {\n            this.hasBindingsWithPipes = true;\n        }\n    }\n    /**\n     * Registers the element's static style string value to the builder.\n     *\n     * @param value the style string (e.g. `width:100px; height:200px;`)\n     */\n    registerStyleAttr(value) {\n        this._initialStyleValues = parse(value);\n        this._hasInitialValues = true;\n    }\n    /**\n     * Registers the element's static class string value to the builder.\n     *\n     * @param value the className string (e.g. `disabled gold zoom`)\n     */\n    registerClassAttr(value) {\n        this._initialClassValues = value.trim().split(/\\s+/g);\n        this._hasInitialValues = true;\n    }\n    /**\n     * Appends all styling-related expressions to the provided attrs array.\n     *\n     * @param attrs an existing array where each of the styling expressions\n     * will be inserted into.\n     */\n    populateInitialStylingAttrs(attrs) {\n        // [CLASS_MARKER, 'foo', 'bar', 'baz' ...]\n        if (this._initialClassValues.length) {\n            attrs.push(literal(1 /* Classes */));\n            for (let i = 0; i < this._initialClassValues.length; i++) {\n                attrs.push(literal(this._initialClassValues[i]));\n            }\n        }\n        // [STYLE_MARKER, 'width', '200px', 'height', '100px', ...]\n        if (this._initialStyleValues.length) {\n            attrs.push(literal(2 /* Styles */));\n            for (let i = 0; i < this._initialStyleValues.length; i += 2) {\n                attrs.push(literal(this._initialStyleValues[i]), literal(this._initialStyleValues[i + 1]));\n            }\n        }\n    }\n    /**\n     * Builds an instruction with all the expressions and parameters for `elementHostAttrs`.\n     *\n     * The instruction generation code below is used for producing the AOT statement code which is\n     * responsible for registering initial styles (within a directive hostBindings' creation block),\n     * as well as any of the provided attribute values, to the directive host element.\n     */\n    assignHostAttrs(attrs, definitionMap) {\n        if (this._directiveExpr && (attrs.length || this._hasInitialValues)) {\n            this.populateInitialStylingAttrs(attrs);\n            definitionMap.set('hostAttrs', literalArr(attrs));\n        }\n    }\n    /**\n     * Builds an instruction with all the expressions and parameters for `classMap`.\n     *\n     * The instruction data will contain all expressions for `classMap` to function\n     * which includes the `[class]` expression params.\n     */\n    buildClassMapInstruction(valueConverter) {\n        if (this._classMapInput) {\n            return this._buildMapBasedInstruction(valueConverter, true, this._classMapInput);\n        }\n        return null;\n    }\n    /**\n     * Builds an instruction with all the expressions and parameters for `styleMap`.\n     *\n     * The instruction data will contain all expressions for `styleMap` to function\n     * which includes the `[style]` expression params.\n     */\n    buildStyleMapInstruction(valueConverter) {\n        if (this._styleMapInput) {\n            return this._buildMapBasedInstruction(valueConverter, false, this._styleMapInput);\n        }\n        return null;\n    }\n    _buildMapBasedInstruction(valueConverter, isClassBased, stylingInput) {\n        // each styling binding value is stored in the LView\n        // map-based bindings allocate two slots: one for the\n        // previous binding value and another for the previous\n        // className or style attribute value.\n        let totalBindingSlotsRequired = MIN_STYLING_BINDING_SLOTS_REQUIRED;\n        // these values must be outside of the update block so that they can\n        // be evaluated (the AST visit call) during creation time so that any\n        // pipes can be picked up in time before the template is built\n        const mapValue = stylingInput.value.visit(valueConverter);\n        let reference;\n        if (mapValue instanceof Interpolation) {\n            totalBindingSlotsRequired += mapValue.expressions.length;\n            reference = isClassBased ? getClassMapInterpolationExpression(mapValue) :\n                getStyleMapInterpolationExpression(mapValue);\n        }\n        else {\n            reference = isClassBased ? Identifiers$1.classMap : Identifiers$1.styleMap;\n        }\n        return {\n            reference,\n            calls: [{\n                    supportsInterpolation: true,\n                    sourceSpan: stylingInput.sourceSpan,\n                    allocateBindingSlots: totalBindingSlotsRequired,\n                    params: (convertFn) => {\n                        const convertResult = convertFn(mapValue);\n                        const params = Array.isArray(convertResult) ? convertResult : [convertResult];\n                        return params;\n                    }\n                }]\n        };\n    }\n    _buildSingleInputs(reference, inputs, valueConverter, getInterpolationExpressionFn, isClassBased) {\n        const instructions = [];\n        inputs.forEach(input => {\n            const previousInstruction = instructions[instructions.length - 1];\n            const value = input.value.visit(valueConverter);\n            let referenceForCall = reference;\n            // each styling binding value is stored in the LView\n            // but there are two values stored for each binding:\n            //   1) the value itself\n            //   2) an intermediate value (concatenation of style up to this point).\n            //      We need to store the intermediate value so that we don't allocate\n            //      the strings on each CD.\n            let totalBindingSlotsRequired = MIN_STYLING_BINDING_SLOTS_REQUIRED;\n            if (value instanceof Interpolation) {\n                totalBindingSlotsRequired += value.expressions.length;\n                if (getInterpolationExpressionFn) {\n                    referenceForCall = getInterpolationExpressionFn(value);\n                }\n            }\n            const call = {\n                sourceSpan: input.sourceSpan,\n                allocateBindingSlots: totalBindingSlotsRequired,\n                supportsInterpolation: !!getInterpolationExpressionFn,\n                params: (convertFn) => {\n                    // params => stylingProp(propName, value, suffix)\n                    const params = [];\n                    params.push(literal(input.name));\n                    const convertResult = convertFn(value);\n                    if (Array.isArray(convertResult)) {\n                        params.push(...convertResult);\n                    }\n                    else {\n                        params.push(convertResult);\n                    }\n                    // [style.prop] bindings may use suffix values (e.g. px, em, etc...), therefore,\n                    // if that is detected then we need to pass that in as an optional param.\n                    if (!isClassBased && input.suffix !== null) {\n                        params.push(literal(input.suffix));\n                    }\n                    return params;\n                }\n            };\n            // If we ended up generating a call to the same instruction as the previous styling property\n            // we can chain the calls together safely to save some bytes, otherwise we have to generate\n            // a separate instruction call. This is primarily a concern with interpolation instructions\n            // where we may start off with one `reference`, but end up using another based on the\n            // number of interpolations.\n            if (previousInstruction && previousInstruction.reference === referenceForCall) {\n                previousInstruction.calls.push(call);\n            }\n            else {\n                instructions.push({ reference: referenceForCall, calls: [call] });\n            }\n        });\n        return instructions;\n    }\n    _buildClassInputs(valueConverter) {\n        if (this._singleClassInputs) {\n            return this._buildSingleInputs(Identifiers$1.classProp, this._singleClassInputs, valueConverter, null, true);\n        }\n        return [];\n    }\n    _buildStyleInputs(valueConverter) {\n        if (this._singleStyleInputs) {\n            return this._buildSingleInputs(Identifiers$1.styleProp, this._singleStyleInputs, valueConverter, getStylePropInterpolationExpression, false);\n        }\n        return [];\n    }\n    /**\n     * Constructs all instructions which contain the expressions that will be placed\n     * into the update block of a template function or a directive hostBindings function.\n     */\n    buildUpdateLevelInstructions(valueConverter) {\n        const instructions = [];\n        if (this.hasBindings) {\n            const styleMapInstruction = this.buildStyleMapInstruction(valueConverter);\n            if (styleMapInstruction) {\n                instructions.push(styleMapInstruction);\n            }\n            const classMapInstruction = this.buildClassMapInstruction(valueConverter);\n            if (classMapInstruction) {\n                instructions.push(classMapInstruction);\n            }\n            instructions.push(...this._buildStyleInputs(valueConverter));\n            instructions.push(...this._buildClassInputs(valueConverter));\n        }\n        return instructions;\n    }\n}\nfunction registerIntoMap(map, key) {\n    if (!map.has(key)) {\n        map.set(key, map.size);\n    }\n}\nfunction parseProperty(name) {\n    let hasOverrideFlag = false;\n    const overrideIndex = name.indexOf(IMPORTANT_FLAG);\n    if (overrideIndex !== -1) {\n        name = overrideIndex > 0 ? name.substring(0, overrideIndex) : '';\n        hasOverrideFlag = true;\n    }\n    let suffix = null;\n    let property = name;\n    const unitIndex = name.lastIndexOf('.');\n    if (unitIndex > 0) {\n        suffix = name.substr(unitIndex + 1);\n        property = name.substring(0, unitIndex);\n    }\n    return { property, suffix, hasOverrideFlag };\n}\n/**\n * Gets the instruction to generate for an interpolated class map.\n * @param interpolation An Interpolation AST\n */\nfunction getClassMapInterpolationExpression(interpolation) {\n    switch (getInterpolationArgsLength(interpolation)) {\n        case 1:\n            return Identifiers$1.classMap;\n        case 3:\n            return Identifiers$1.classMapInterpolate1;\n        case 5:\n            return Identifiers$1.classMapInterpolate2;\n        case 7:\n            return Identifiers$1.classMapInterpolate3;\n        case 9:\n            return Identifiers$1.classMapInterpolate4;\n        case 11:\n            return Identifiers$1.classMapInterpolate5;\n        case 13:\n            return Identifiers$1.classMapInterpolate6;\n        case 15:\n            return Identifiers$1.classMapInterpolate7;\n        case 17:\n            return Identifiers$1.classMapInterpolate8;\n        default:\n            return Identifiers$1.classMapInterpolateV;\n    }\n}\n/**\n * Gets the instruction to generate for an interpolated style map.\n * @param interpolation An Interpolation AST\n */\nfunction getStyleMapInterpolationExpression(interpolation) {\n    switch (getInterpolationArgsLength(interpolation)) {\n        case 1:\n            return Identifiers$1.styleMap;\n        case 3:\n            return Identifiers$1.styleMapInterpolate1;\n        case 5:\n            return Identifiers$1.styleMapInterpolate2;\n        case 7:\n            return Identifiers$1.styleMapInterpolate3;\n        case 9:\n            return Identifiers$1.styleMapInterpolate4;\n        case 11:\n            return Identifiers$1.styleMapInterpolate5;\n        case 13:\n            return Identifiers$1.styleMapInterpolate6;\n        case 15:\n            return Identifiers$1.styleMapInterpolate7;\n        case 17:\n            return Identifiers$1.styleMapInterpolate8;\n        default:\n            return Identifiers$1.styleMapInterpolateV;\n    }\n}\n/**\n * Gets the instruction to generate for an interpolated style prop.\n * @param interpolation An Interpolation AST\n */\nfunction getStylePropInterpolationExpression(interpolation) {\n    switch (getInterpolationArgsLength(interpolation)) {\n        case 1:\n            return Identifiers$1.styleProp;\n        case 3:\n            return Identifiers$1.stylePropInterpolate1;\n        case 5:\n            return Identifiers$1.stylePropInterpolate2;\n        case 7:\n            return Identifiers$1.stylePropInterpolate3;\n        case 9:\n            return Identifiers$1.stylePropInterpolate4;\n        case 11:\n            return Identifiers$1.stylePropInterpolate5;\n        case 13:\n            return Identifiers$1.stylePropInterpolate6;\n        case 15:\n            return Identifiers$1.stylePropInterpolate7;\n        case 17:\n            return Identifiers$1.stylePropInterpolate8;\n        default:\n            return Identifiers$1.stylePropInterpolateV;\n    }\n}\nfunction normalizePropName(prop) {\n    return hyphenate(prop);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nvar TokenType$1;\n(function (TokenType) {\n    TokenType[TokenType[\"Character\"] = 0] = \"Character\";\n    TokenType[TokenType[\"Identifier\"] = 1] = \"Identifier\";\n    TokenType[TokenType[\"Keyword\"] = 2] = \"Keyword\";\n    TokenType[TokenType[\"String\"] = 3] = \"String\";\n    TokenType[TokenType[\"Operator\"] = 4] = \"Operator\";\n    TokenType[TokenType[\"Number\"] = 5] = \"Number\";\n    TokenType[TokenType[\"Error\"] = 6] = \"Error\";\n})(TokenType$1 || (TokenType$1 = {}));\nconst KEYWORDS = ['var', 'let', 'as', 'null', 'undefined', 'true', 'false', 'if', 'else', 'this'];\nclass Lexer {\n    tokenize(text) {\n        const scanner = new _Scanner(text);\n        const tokens = [];\n        let token = scanner.scanToken();\n        while (token != null) {\n            tokens.push(token);\n            token = scanner.scanToken();\n        }\n        return tokens;\n    }\n}\nclass Token$1 {\n    constructor(index, end, type, numValue, strValue) {\n        this.index = index;\n        this.end = end;\n        this.type = type;\n        this.numValue = numValue;\n        this.strValue = strValue;\n    }\n    isCharacter(code) {\n        return this.type == TokenType$1.Character && this.numValue == code;\n    }\n    isNumber() {\n        return this.type == TokenType$1.Number;\n    }\n    isString() {\n        return this.type == TokenType$1.String;\n    }\n    isOperator(operator) {\n        return this.type == TokenType$1.Operator && this.strValue == operator;\n    }\n    isIdentifier() {\n        return this.type == TokenType$1.Identifier;\n    }\n    isKeyword() {\n        return this.type == TokenType$1.Keyword;\n    }\n    isKeywordLet() {\n        return this.type == TokenType$1.Keyword && this.strValue == 'let';\n    }\n    isKeywordAs() {\n        return this.type == TokenType$1.Keyword && this.strValue == 'as';\n    }\n    isKeywordNull() {\n        return this.type == TokenType$1.Keyword && this.strValue == 'null';\n    }\n    isKeywordUndefined() {\n        return this.type == TokenType$1.Keyword && this.strValue == 'undefined';\n    }\n    isKeywordTrue() {\n        return this.type == TokenType$1.Keyword && this.strValue == 'true';\n    }\n    isKeywordFalse() {\n        return this.type == TokenType$1.Keyword && this.strValue == 'false';\n    }\n    isKeywordThis() {\n        return this.type == TokenType$1.Keyword && this.strValue == 'this';\n    }\n    isError() {\n        return this.type == TokenType$1.Error;\n    }\n    toNumber() {\n        return this.type == TokenType$1.Number ? this.numValue : -1;\n    }\n    toString() {\n        switch (this.type) {\n            case TokenType$1.Character:\n            case TokenType$1.Identifier:\n            case TokenType$1.Keyword:\n            case TokenType$1.Operator:\n            case TokenType$1.String:\n            case TokenType$1.Error:\n                return this.strValue;\n            case TokenType$1.Number:\n                return this.numValue.toString();\n            default:\n                return null;\n        }\n    }\n}\nfunction newCharacterToken(index, end, code) {\n    return new Token$1(index, end, TokenType$1.Character, code, String.fromCharCode(code));\n}\nfunction newIdentifierToken(index, end, text) {\n    return new Token$1(index, end, TokenType$1.Identifier, 0, text);\n}\nfunction newKeywordToken(index, end, text) {\n    return new Token$1(index, end, TokenType$1.Keyword, 0, text);\n}\nfunction newOperatorToken(index, end, text) {\n    return new Token$1(index, end, TokenType$1.Operator, 0, text);\n}\nfunction newStringToken(index, end, text) {\n    return new Token$1(index, end, TokenType$1.String, 0, text);\n}\nfunction newNumberToken(index, end, n) {\n    return new Token$1(index, end, TokenType$1.Number, n, '');\n}\nfunction newErrorToken(index, end, message) {\n    return new Token$1(index, end, TokenType$1.Error, 0, message);\n}\nconst EOF = new Token$1(-1, -1, TokenType$1.Character, 0, '');\nclass _Scanner {\n    constructor(input) {\n        this.input = input;\n        this.peek = 0;\n        this.index = -1;\n        this.length = input.length;\n        this.advance();\n    }\n    advance() {\n        this.peek = ++this.index >= this.length ? $EOF : this.input.charCodeAt(this.index);\n    }\n    scanToken() {\n        const input = this.input, length = this.length;\n        let peek = this.peek, index = this.index;\n        // Skip whitespace.\n        while (peek <= $SPACE) {\n            if (++index >= length) {\n                peek = $EOF;\n                break;\n            }\n            else {\n                peek = input.charCodeAt(index);\n            }\n        }\n        this.peek = peek;\n        this.index = index;\n        if (index >= length) {\n            return null;\n        }\n        // Handle identifiers and numbers.\n        if (isIdentifierStart(peek))\n            return this.scanIdentifier();\n        if (isDigit(peek))\n            return this.scanNumber(index);\n        const start = index;\n        switch (peek) {\n            case $PERIOD:\n                this.advance();\n                return isDigit(this.peek) ? this.scanNumber(start) :\n                    newCharacterToken(start, this.index, $PERIOD);\n            case $LPAREN:\n            case $RPAREN:\n            case $LBRACE:\n            case $RBRACE:\n            case $LBRACKET:\n            case $RBRACKET:\n            case $COMMA:\n            case $COLON:\n            case $SEMICOLON:\n                return this.scanCharacter(start, peek);\n            case $SQ:\n            case $DQ:\n                return this.scanString();\n            case $HASH:\n            case $PLUS:\n            case $MINUS:\n            case $STAR:\n            case $SLASH:\n            case $PERCENT:\n            case $CARET:\n                return this.scanOperator(start, String.fromCharCode(peek));\n            case $QUESTION:\n                return this.scanComplexOperator(start, '?', $PERIOD, '.');\n            case $LT:\n            case $GT:\n                return this.scanComplexOperator(start, String.fromCharCode(peek), $EQ, '=');\n            case $BANG:\n            case $EQ:\n                return this.scanComplexOperator(start, String.fromCharCode(peek), $EQ, '=', $EQ, '=');\n            case $AMPERSAND:\n                return this.scanComplexOperator(start, '&', $AMPERSAND, '&');\n            case $BAR:\n                return this.scanComplexOperator(start, '|', $BAR, '|');\n            case $NBSP:\n                while (isWhitespace(this.peek))\n                    this.advance();\n                return this.scanToken();\n        }\n        this.advance();\n        return this.error(`Unexpected character [${String.fromCharCode(peek)}]`, 0);\n    }\n    scanCharacter(start, code) {\n        this.advance();\n        return newCharacterToken(start, this.index, code);\n    }\n    scanOperator(start, str) {\n        this.advance();\n        return newOperatorToken(start, this.index, str);\n    }\n    /**\n     * Tokenize a 2/3 char long operator\n     *\n     * @param start start index in the expression\n     * @param one first symbol (always part of the operator)\n     * @param twoCode code point for the second symbol\n     * @param two second symbol (part of the operator when the second code point matches)\n     * @param threeCode code point for the third symbol\n     * @param three third symbol (part of the operator when provided and matches source expression)\n     */\n    scanComplexOperator(start, one, twoCode, two, threeCode, three) {\n        this.advance();\n        let str = one;\n        if (this.peek == twoCode) {\n            this.advance();\n            str += two;\n        }\n        if (threeCode != null && this.peek == threeCode) {\n            this.advance();\n            str += three;\n        }\n        return newOperatorToken(start, this.index, str);\n    }\n    scanIdentifier() {\n        const start = this.index;\n        this.advance();\n        while (isIdentifierPart(this.peek))\n            this.advance();\n        const str = this.input.substring(start, this.index);\n        return KEYWORDS.indexOf(str) > -1 ? newKeywordToken(start, this.index, str) :\n            newIdentifierToken(start, this.index, str);\n    }\n    scanNumber(start) {\n        let simple = (this.index === start);\n        this.advance(); // Skip initial digit.\n        while (true) {\n            if (isDigit(this.peek)) {\n                // Do nothing.\n            }\n            else if (this.peek == $PERIOD) {\n                simple = false;\n            }\n            else if (isExponentStart(this.peek)) {\n                this.advance();\n                if (isExponentSign(this.peek))\n                    this.advance();\n                if (!isDigit(this.peek))\n                    return this.error('Invalid exponent', -1);\n                simple = false;\n            }\n            else {\n                break;\n            }\n            this.advance();\n        }\n        const str = this.input.substring(start, this.index);\n        const value = simple ? parseIntAutoRadix(str) : parseFloat(str);\n        return newNumberToken(start, this.index, value);\n    }\n    scanString() {\n        const start = this.index;\n        const quote = this.peek;\n        this.advance(); // Skip initial quote.\n        let buffer = '';\n        let marker = this.index;\n        const input = this.input;\n        while (this.peek != quote) {\n            if (this.peek == $BACKSLASH) {\n                buffer += input.substring(marker, this.index);\n                this.advance();\n                let unescapedCode;\n                // Workaround for TS2.1-introduced type strictness\n                this.peek = this.peek;\n                if (this.peek == $u) {\n                    // 4 character hex code for unicode character.\n                    const hex = input.substring(this.index + 1, this.index + 5);\n                    if (/^[0-9a-f]+$/i.test(hex)) {\n                        unescapedCode = parseInt(hex, 16);\n                    }\n                    else {\n                        return this.error(`Invalid unicode escape [\\\\u${hex}]`, 0);\n                    }\n                    for (let i = 0; i < 5; i++) {\n                        this.advance();\n                    }\n                }\n                else {\n                    unescapedCode = unescape(this.peek);\n                    this.advance();\n                }\n                buffer += String.fromCharCode(unescapedCode);\n                marker = this.index;\n            }\n            else if (this.peek == $EOF) {\n                return this.error('Unterminated quote', 0);\n            }\n            else {\n                this.advance();\n            }\n        }\n        const last = input.substring(marker, this.index);\n        this.advance(); // Skip terminating quote.\n        return newStringToken(start, this.index, buffer + last);\n    }\n    error(message, offset) {\n        const position = this.index + offset;\n        return newErrorToken(position, this.index, `Lexer Error: ${message} at column ${position} in expression [${this.input}]`);\n    }\n}\nfunction isIdentifierStart(code) {\n    return ($a <= code && code <= $z) || ($A <= code && code <= $Z) ||\n        (code == $_) || (code == $$);\n}\nfunction isIdentifier(input) {\n    if (input.length == 0)\n        return false;\n    const scanner = new _Scanner(input);\n    if (!isIdentifierStart(scanner.peek))\n        return false;\n    scanner.advance();\n    while (scanner.peek !== $EOF) {\n        if (!isIdentifierPart(scanner.peek))\n            return false;\n        scanner.advance();\n    }\n    return true;\n}\nfunction isIdentifierPart(code) {\n    return isAsciiLetter(code) || isDigit(code) || (code == $_) ||\n        (code == $$);\n}\nfunction isExponentStart(code) {\n    return code == $e || code == $E;\n}\nfunction isExponentSign(code) {\n    return code == $MINUS || code == $PLUS;\n}\nfunction isQuote(code) {\n    return code === $SQ || code === $DQ || code === $BT;\n}\nfunction unescape(code) {\n    switch (code) {\n        case $n:\n            return $LF;\n        case $f:\n            return $FF;\n        case $r:\n            return $CR;\n        case $t:\n            return $TAB;\n        case $v:\n            return $VTAB;\n        default:\n            return code;\n    }\n}\nfunction parseIntAutoRadix(text) {\n    const result = parseInt(text);\n    if (isNaN(result)) {\n        throw new Error('Invalid integer literal when parsing ' + text);\n    }\n    return result;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass SplitInterpolation {\n    constructor(strings, stringSpans, expressions, expressionsSpans, offsets) {\n        this.strings = strings;\n        this.stringSpans = stringSpans;\n        this.expressions = expressions;\n        this.expressionsSpans = expressionsSpans;\n        this.offsets = offsets;\n    }\n}\nclass TemplateBindingParseResult {\n    constructor(templateBindings, warnings, errors) {\n        this.templateBindings = templateBindings;\n        this.warnings = warnings;\n        this.errors = errors;\n    }\n}\nconst defaultInterpolateRegExp = _createInterpolateRegExp(DEFAULT_INTERPOLATION_CONFIG);\nfunction _getInterpolateRegExp(config) {\n    if (config === DEFAULT_INTERPOLATION_CONFIG) {\n        return defaultInterpolateRegExp;\n    }\n    else {\n        return _createInterpolateRegExp(config);\n    }\n}\nfunction _createInterpolateRegExp(config) {\n    const pattern = escapeRegExp(config.start) + '([\\\\s\\\\S]*?)' + escapeRegExp(config.end);\n    return new RegExp(pattern, 'g');\n}\nclass Parser$1 {\n    constructor(_lexer) {\n        this._lexer = _lexer;\n        this.errors = [];\n        this.simpleExpressionChecker = SimpleExpressionChecker;\n    }\n    parseAction(input, location, absoluteOffset, interpolationConfig = DEFAULT_INTERPOLATION_CONFIG) {\n        this._checkNoInterpolation(input, location, interpolationConfig);\n        const sourceToLex = this._stripComments(input);\n        const tokens = this._lexer.tokenize(this._stripComments(input));\n        const ast = new _ParseAST(input, location, absoluteOffset, tokens, sourceToLex.length, true, this.errors, input.length - sourceToLex.length)\n            .parseChain();\n        return new ASTWithSource(ast, input, location, absoluteOffset, this.errors);\n    }\n    parseBinding(input, location, absoluteOffset, interpolationConfig = DEFAULT_INTERPOLATION_CONFIG) {\n        const ast = this._parseBindingAst(input, location, absoluteOffset, interpolationConfig);\n        return new ASTWithSource(ast, input, location, absoluteOffset, this.errors);\n    }\n    checkSimpleExpression(ast) {\n        const checker = new this.simpleExpressionChecker();\n        ast.visit(checker);\n        return checker.errors;\n    }\n    parseSimpleBinding(input, location, absoluteOffset, interpolationConfig = DEFAULT_INTERPOLATION_CONFIG) {\n        const ast = this._parseBindingAst(input, location, absoluteOffset, interpolationConfig);\n        const errors = this.checkSimpleExpression(ast);\n        if (errors.length > 0) {\n            this._reportError(`Host binding expression cannot contain ${errors.join(' ')}`, input, location);\n        }\n        return new ASTWithSource(ast, input, location, absoluteOffset, this.errors);\n    }\n    _reportError(message, input, errLocation, ctxLocation) {\n        this.errors.push(new ParserError(message, input, errLocation, ctxLocation));\n    }\n    _parseBindingAst(input, location, absoluteOffset, interpolationConfig) {\n        // Quotes expressions use 3rd-party expression language. We don't want to use\n        // our lexer or parser for that, so we check for that ahead of time.\n        const quote = this._parseQuote(input, location, absoluteOffset);\n        if (quote != null) {\n            return quote;\n        }\n        this._checkNoInterpolation(input, location, interpolationConfig);\n        const sourceToLex = this._stripComments(input);\n        const tokens = this._lexer.tokenize(sourceToLex);\n        return new _ParseAST(input, location, absoluteOffset, tokens, sourceToLex.length, false, this.errors, input.length - sourceToLex.length)\n            .parseChain();\n    }\n    _parseQuote(input, location, absoluteOffset) {\n        if (input == null)\n            return null;\n        const prefixSeparatorIndex = input.indexOf(':');\n        if (prefixSeparatorIndex == -1)\n            return null;\n        const prefix = input.substring(0, prefixSeparatorIndex).trim();\n        if (!isIdentifier(prefix))\n            return null;\n        const uninterpretedExpression = input.substring(prefixSeparatorIndex + 1);\n        const span = new ParseSpan(0, input.length);\n        return new Quote(span, span.toAbsolute(absoluteOffset), prefix, uninterpretedExpression, location);\n    }\n    /**\n     * Parse microsyntax template expression and return a list of bindings or\n     * parsing errors in case the given expression is invalid.\n     *\n     * For example,\n     * ```\n     *   <div *ngFor=\"let item of items\">\n     *         ^      ^ absoluteValueOffset for `templateValue`\n     *         absoluteKeyOffset for `templateKey`\n     * ```\n     * contains three bindings:\n     * 1. ngFor -> null\n     * 2. item -> NgForOfContext.$implicit\n     * 3. ngForOf -> items\n     *\n     * This is apparent from the de-sugared template:\n     * ```\n     *   <ng-template ngFor let-item [ngForOf]=\"items\">\n     * ```\n     *\n     * @param templateKey name of directive, without the * prefix. For example: ngIf, ngFor\n     * @param templateValue RHS of the microsyntax attribute\n     * @param templateUrl template filename if it's external, component filename if it's inline\n     * @param absoluteKeyOffset start of the `templateKey`\n     * @param absoluteValueOffset start of the `templateValue`\n     */\n    parseTemplateBindings(templateKey, templateValue, templateUrl, absoluteKeyOffset, absoluteValueOffset) {\n        const tokens = this._lexer.tokenize(templateValue);\n        const parser = new _ParseAST(templateValue, templateUrl, absoluteValueOffset, tokens, templateValue.length, false /* parseAction */, this.errors, 0 /* relative offset */);\n        return parser.parseTemplateBindings({\n            source: templateKey,\n            span: new AbsoluteSourceSpan(absoluteKeyOffset, absoluteKeyOffset + templateKey.length),\n        });\n    }\n    parseInterpolation(input, location, absoluteOffset, interpolationConfig = DEFAULT_INTERPOLATION_CONFIG) {\n        const split = this.splitInterpolation(input, location, interpolationConfig);\n        if (split == null)\n            return null;\n        const expressions = [];\n        for (let i = 0; i < split.expressions.length; ++i) {\n            const expressionText = split.expressions[i];\n            const sourceToLex = this._stripComments(expressionText);\n            const tokens = this._lexer.tokenize(sourceToLex);\n            const ast = new _ParseAST(input, location, absoluteOffset, tokens, sourceToLex.length, false, this.errors, split.offsets[i] + (expressionText.length - sourceToLex.length))\n                .parseChain();\n            expressions.push(ast);\n        }\n        const span = new ParseSpan(0, input == null ? 0 : input.length);\n        return new ASTWithSource(new Interpolation(span, span.toAbsolute(absoluteOffset), split.strings, expressions), input, location, absoluteOffset, this.errors);\n    }\n    splitInterpolation(input, location, interpolationConfig = DEFAULT_INTERPOLATION_CONFIG) {\n        const regexp = _getInterpolateRegExp(interpolationConfig);\n        const parts = input.split(regexp);\n        if (parts.length <= 1) {\n            return null;\n        }\n        const strings = [];\n        const expressions = [];\n        const offsets = [];\n        const stringSpans = [];\n        const expressionSpans = [];\n        let offset = 0;\n        for (let i = 0; i < parts.length; i++) {\n            const part = parts[i];\n            if (i % 2 === 0) {\n                // fixed string\n                strings.push(part);\n                const start = offset;\n                offset += part.length;\n                stringSpans.push({ start, end: offset });\n            }\n            else if (part.trim().length > 0) {\n                const start = offset;\n                offset += interpolationConfig.start.length;\n                expressions.push(part);\n                offsets.push(offset);\n                offset += part.length + interpolationConfig.end.length;\n                expressionSpans.push({ start, end: offset });\n            }\n            else {\n                this._reportError('Blank expressions are not allowed in interpolated strings', input, `at column ${this._findInterpolationErrorColumn(parts, i, interpolationConfig)} in`, location);\n                expressions.push('$implicit');\n                offsets.push(offset);\n                expressionSpans.push({ start: offset, end: offset });\n            }\n        }\n        return new SplitInterpolation(strings, stringSpans, expressions, expressionSpans, offsets);\n    }\n    wrapLiteralPrimitive(input, location, absoluteOffset) {\n        const span = new ParseSpan(0, input == null ? 0 : input.length);\n        return new ASTWithSource(new LiteralPrimitive(span, span.toAbsolute(absoluteOffset), input), input, location, absoluteOffset, this.errors);\n    }\n    _stripComments(input) {\n        const i = this._commentStart(input);\n        return i != null ? input.substring(0, i).trim() : input;\n    }\n    _commentStart(input) {\n        let outerQuote = null;\n        for (let i = 0; i < input.length - 1; i++) {\n            const char = input.charCodeAt(i);\n            const nextChar = input.charCodeAt(i + 1);\n            if (char === $SLASH && nextChar == $SLASH && outerQuote == null)\n                return i;\n            if (outerQuote === char) {\n                outerQuote = null;\n            }\n            else if (outerQuote == null && isQuote(char)) {\n                outerQuote = char;\n            }\n        }\n        return null;\n    }\n    _checkNoInterpolation(input, location, interpolationConfig) {\n        const regexp = _getInterpolateRegExp(interpolationConfig);\n        const parts = input.split(regexp);\n        if (parts.length > 1) {\n            this._reportError(`Got interpolation (${interpolationConfig.start}${interpolationConfig.end}) where expression was expected`, input, `at column ${this._findInterpolationErrorColumn(parts, 1, interpolationConfig)} in`, location);\n        }\n    }\n    _findInterpolationErrorColumn(parts, partInErrIdx, interpolationConfig) {\n        let errLocation = '';\n        for (let j = 0; j < partInErrIdx; j++) {\n            errLocation += j % 2 === 0 ?\n                parts[j] :\n                `${interpolationConfig.start}${parts[j]}${interpolationConfig.end}`;\n        }\n        return errLocation.length;\n    }\n}\nclass IvyParser extends Parser$1 {\n    constructor() {\n        super(...arguments);\n        this.simpleExpressionChecker = IvySimpleExpressionChecker; //\n    }\n}\nclass _ParseAST {\n    constructor(input, location, absoluteOffset, tokens, inputLength, parseAction, errors, offset) {\n        this.input = input;\n        this.location = location;\n        this.absoluteOffset = absoluteOffset;\n        this.tokens = tokens;\n        this.inputLength = inputLength;\n        this.parseAction = parseAction;\n        this.errors = errors;\n        this.offset = offset;\n        this.rparensExpected = 0;\n        this.rbracketsExpected = 0;\n        this.rbracesExpected = 0;\n        // Cache of expression start and input indeces to the absolute source span they map to, used to\n        // prevent creating superfluous source spans in `sourceSpan`.\n        // A serial of the expression start and input index is used for mapping because both are stateful\n        // and may change for subsequent expressions visited by the parser.\n        this.sourceSpanCache = new Map();\n        this.index = 0;\n    }\n    peek(offset) {\n        const i = this.index + offset;\n        return i < this.tokens.length ? this.tokens[i] : EOF;\n    }\n    get next() {\n        return this.peek(0);\n    }\n    /** Whether all the parser input has been processed. */\n    get atEOF() {\n        return this.index >= this.tokens.length;\n    }\n    /**\n     * Index of the next token to be processed, or the end of the last token if all have been\n     * processed.\n     */\n    get inputIndex() {\n        return this.atEOF ? this.currentEndIndex : this.next.index + this.offset;\n    }\n    /**\n     * End index of the last processed token, or the start of the first token if none have been\n     * processed.\n     */\n    get currentEndIndex() {\n        if (this.index > 0) {\n            const curToken = this.peek(-1);\n            return curToken.end + this.offset;\n        }\n        // No tokens have been processed yet; return the next token's start or the length of the input\n        // if there is no token.\n        if (this.tokens.length === 0) {\n            return this.inputLength + this.offset;\n        }\n        return this.next.index + this.offset;\n    }\n    /**\n     * Returns the absolute offset of the start of the current token.\n     */\n    get currentAbsoluteOffset() {\n        return this.absoluteOffset + this.inputIndex;\n    }\n    span(start) {\n        return new ParseSpan(start, this.currentEndIndex);\n    }\n    sourceSpan(start) {\n        const serial = `${start}@${this.inputIndex}`;\n        if (!this.sourceSpanCache.has(serial)) {\n            this.sourceSpanCache.set(serial, this.span(start).toAbsolute(this.absoluteOffset));\n        }\n        return this.sourceSpanCache.get(serial);\n    }\n    advance() {\n        this.index++;\n    }\n    consumeOptionalCharacter(code) {\n        if (this.next.isCharacter(code)) {\n            this.advance();\n            return true;\n        }\n        else {\n            return false;\n        }\n    }\n    peekKeywordLet() {\n        return this.next.isKeywordLet();\n    }\n    peekKeywordAs() {\n        return this.next.isKeywordAs();\n    }\n    expectCharacter(code) {\n        if (this.consumeOptionalCharacter(code))\n            return;\n        this.error(`Missing expected ${String.fromCharCode(code)}`);\n    }\n    consumeOptionalOperator(op) {\n        if (this.next.isOperator(op)) {\n            this.advance();\n            return true;\n        }\n        else {\n            return false;\n        }\n    }\n    expectOperator(operator) {\n        if (this.consumeOptionalOperator(operator))\n            return;\n        this.error(`Missing expected operator ${operator}`);\n    }\n    expectIdentifierOrKeyword() {\n        const n = this.next;\n        if (!n.isIdentifier() && !n.isKeyword()) {\n            this.error(`Unexpected token ${n}, expected identifier or keyword`);\n            return '';\n        }\n        this.advance();\n        return n.toString();\n    }\n    expectIdentifierOrKeywordOrString() {\n        const n = this.next;\n        if (!n.isIdentifier() && !n.isKeyword() && !n.isString()) {\n            this.error(`Unexpected token ${n}, expected identifier, keyword, or string`);\n            return '';\n        }\n        this.advance();\n        return n.toString();\n    }\n    parseChain() {\n        const exprs = [];\n        const start = this.inputIndex;\n        while (this.index < this.tokens.length) {\n            const expr = this.parsePipe();\n            exprs.push(expr);\n            if (this.consumeOptionalCharacter($SEMICOLON)) {\n                if (!this.parseAction) {\n                    this.error('Binding expression cannot contain chained expression');\n                }\n                while (this.consumeOptionalCharacter($SEMICOLON)) {\n                } // read all semicolons\n            }\n            else if (this.index < this.tokens.length) {\n                this.error(`Unexpected token '${this.next}'`);\n            }\n        }\n        if (exprs.length == 0)\n            return new EmptyExpr(this.span(start), this.sourceSpan(start));\n        if (exprs.length == 1)\n            return exprs[0];\n        return new Chain(this.span(start), this.sourceSpan(start), exprs);\n    }\n    parsePipe() {\n        let result = this.parseExpression();\n        if (this.consumeOptionalOperator('|')) {\n            if (this.parseAction) {\n                this.error('Cannot have a pipe in an action expression');\n            }\n            do {\n                const nameStart = this.inputIndex;\n                const name = this.expectIdentifierOrKeyword();\n                const nameSpan = this.sourceSpan(nameStart);\n                const args = [];\n                while (this.consumeOptionalCharacter($COLON)) {\n                    args.push(this.parseExpression());\n                }\n                const { start } = result.span;\n                result =\n                    new BindingPipe(this.span(start), this.sourceSpan(start), result, name, args, nameSpan);\n            } while (this.consumeOptionalOperator('|'));\n        }\n        return result;\n    }\n    parseExpression() {\n        return this.parseConditional();\n    }\n    parseConditional() {\n        const start = this.inputIndex;\n        const result = this.parseLogicalOr();\n        if (this.consumeOptionalOperator('?')) {\n            const yes = this.parsePipe();\n            let no;\n            if (!this.consumeOptionalCharacter($COLON)) {\n                const end = this.inputIndex;\n                const expression = this.input.substring(start, end);\n                this.error(`Conditional expression ${expression} requires all 3 expressions`);\n                no = new EmptyExpr(this.span(start), this.sourceSpan(start));\n            }\n            else {\n                no = this.parsePipe();\n            }\n            return new Conditional(this.span(start), this.sourceSpan(start), result, yes, no);\n        }\n        else {\n            return result;\n        }\n    }\n    parseLogicalOr() {\n        // '||'\n        let result = this.parseLogicalAnd();\n        while (this.consumeOptionalOperator('||')) {\n            const right = this.parseLogicalAnd();\n            const { start } = result.span;\n            result = new Binary(this.span(start), this.sourceSpan(start), '||', result, right);\n        }\n        return result;\n    }\n    parseLogicalAnd() {\n        // '&&'\n        let result = this.parseEquality();\n        while (this.consumeOptionalOperator('&&')) {\n            const right = this.parseEquality();\n            const { start } = result.span;\n            result = new Binary(this.span(start), this.sourceSpan(start), '&&', result, right);\n        }\n        return result;\n    }\n    parseEquality() {\n        // '==','!=','===','!=='\n        let result = this.parseRelational();\n        while (this.next.type == TokenType$1.Operator) {\n            const operator = this.next.strValue;\n            switch (operator) {\n                case '==':\n                case '===':\n                case '!=':\n                case '!==':\n                    this.advance();\n                    const right = this.parseRelational();\n                    const { start } = result.span;\n                    result = new Binary(this.span(start), this.sourceSpan(start), operator, result, right);\n                    continue;\n            }\n            break;\n        }\n        return result;\n    }\n    parseRelational() {\n        // '<', '>', '<=', '>='\n        let result = this.parseAdditive();\n        while (this.next.type == TokenType$1.Operator) {\n            const operator = this.next.strValue;\n            switch (operator) {\n                case '<':\n                case '>':\n                case '<=':\n                case '>=':\n                    this.advance();\n                    const right = this.parseAdditive();\n                    const { start } = result.span;\n                    result = new Binary(this.span(start), this.sourceSpan(start), operator, result, right);\n                    continue;\n            }\n            break;\n        }\n        return result;\n    }\n    parseAdditive() {\n        // '+', '-'\n        let result = this.parseMultiplicative();\n        while (this.next.type == TokenType$1.Operator) {\n            const operator = this.next.strValue;\n            switch (operator) {\n                case '+':\n                case '-':\n                    this.advance();\n                    let right = this.parseMultiplicative();\n                    const { start } = result.span;\n                    result = new Binary(this.span(start), this.sourceSpan(start), operator, result, right);\n                    continue;\n            }\n            break;\n        }\n        return result;\n    }\n    parseMultiplicative() {\n        // '*', '%', '/'\n        let result = this.parsePrefix();\n        while (this.next.type == TokenType$1.Operator) {\n            const operator = this.next.strValue;\n            switch (operator) {\n                case '*':\n                case '%':\n                case '/':\n                    this.advance();\n                    let right = this.parsePrefix();\n                    const { start } = result.span;\n                    result = new Binary(this.span(start), this.sourceSpan(start), operator, result, right);\n                    continue;\n            }\n            break;\n        }\n        return result;\n    }\n    parsePrefix() {\n        if (this.next.type == TokenType$1.Operator) {\n            const start = this.inputIndex;\n            const operator = this.next.strValue;\n            let result;\n            switch (operator) {\n                case '+':\n                    this.advance();\n                    result = this.parsePrefix();\n                    return Unary.createPlus(this.span(start), this.sourceSpan(start), result);\n                case '-':\n                    this.advance();\n                    result = this.parsePrefix();\n                    return Unary.createMinus(this.span(start), this.sourceSpan(start), result);\n                case '!':\n                    this.advance();\n                    result = this.parsePrefix();\n                    return new PrefixNot(this.span(start), this.sourceSpan(start), result);\n            }\n        }\n        return this.parseCallChain();\n    }\n    parseCallChain() {\n        let result = this.parsePrimary();\n        const resultStart = result.span.start;\n        while (true) {\n            if (this.consumeOptionalCharacter($PERIOD)) {\n                result = this.parseAccessMemberOrMethodCall(result, false);\n            }\n            else if (this.consumeOptionalOperator('?.')) {\n                result = this.parseAccessMemberOrMethodCall(result, true);\n            }\n            else if (this.consumeOptionalCharacter($LBRACKET)) {\n                this.rbracketsExpected++;\n                const key = this.parsePipe();\n                this.rbracketsExpected--;\n                this.expectCharacter($RBRACKET);\n                if (this.consumeOptionalOperator('=')) {\n                    const value = this.parseConditional();\n                    result = new KeyedWrite(this.span(resultStart), this.sourceSpan(resultStart), result, key, value);\n                }\n                else {\n                    result = new KeyedRead(this.span(resultStart), this.sourceSpan(resultStart), result, key);\n                }\n            }\n            else if (this.consumeOptionalCharacter($LPAREN)) {\n                this.rparensExpected++;\n                const args = this.parseCallArguments();\n                this.rparensExpected--;\n                this.expectCharacter($RPAREN);\n                result =\n                    new FunctionCall(this.span(resultStart), this.sourceSpan(resultStart), result, args);\n            }\n            else if (this.consumeOptionalOperator('!')) {\n                result = new NonNullAssert(this.span(resultStart), this.sourceSpan(resultStart), result);\n            }\n            else {\n                return result;\n            }\n        }\n    }\n    parsePrimary() {\n        const start = this.inputIndex;\n        if (this.consumeOptionalCharacter($LPAREN)) {\n            this.rparensExpected++;\n            const result = this.parsePipe();\n            this.rparensExpected--;\n            this.expectCharacter($RPAREN);\n            return result;\n        }\n        else if (this.next.isKeywordNull()) {\n            this.advance();\n            return new LiteralPrimitive(this.span(start), this.sourceSpan(start), null);\n        }\n        else if (this.next.isKeywordUndefined()) {\n            this.advance();\n            return new LiteralPrimitive(this.span(start), this.sourceSpan(start), void 0);\n        }\n        else if (this.next.isKeywordTrue()) {\n            this.advance();\n            return new LiteralPrimitive(this.span(start), this.sourceSpan(start), true);\n        }\n        else if (this.next.isKeywordFalse()) {\n            this.advance();\n            return new LiteralPrimitive(this.span(start), this.sourceSpan(start), false);\n        }\n        else if (this.next.isKeywordThis()) {\n            this.advance();\n            return new ImplicitReceiver(this.span(start), this.sourceSpan(start));\n        }\n        else if (this.consumeOptionalCharacter($LBRACKET)) {\n            this.rbracketsExpected++;\n            const elements = this.parseExpressionList($RBRACKET);\n            this.rbracketsExpected--;\n            this.expectCharacter($RBRACKET);\n            return new LiteralArray(this.span(start), this.sourceSpan(start), elements);\n        }\n        else if (this.next.isCharacter($LBRACE)) {\n            return this.parseLiteralMap();\n        }\n        else if (this.next.isIdentifier()) {\n            return this.parseAccessMemberOrMethodCall(new ImplicitReceiver(this.span(start), this.sourceSpan(start)), false);\n        }\n        else if (this.next.isNumber()) {\n            const value = this.next.toNumber();\n            this.advance();\n            return new LiteralPrimitive(this.span(start), this.sourceSpan(start), value);\n        }\n        else if (this.next.isString()) {\n            const literalValue = this.next.toString();\n            this.advance();\n            return new LiteralPrimitive(this.span(start), this.sourceSpan(start), literalValue);\n        }\n        else if (this.index >= this.tokens.length) {\n            this.error(`Unexpected end of expression: ${this.input}`);\n            return new EmptyExpr(this.span(start), this.sourceSpan(start));\n        }\n        else {\n            this.error(`Unexpected token ${this.next}`);\n            return new EmptyExpr(this.span(start), this.sourceSpan(start));\n        }\n    }\n    parseExpressionList(terminator) {\n        const result = [];\n        if (!this.next.isCharacter(terminator)) {\n            do {\n                result.push(this.parsePipe());\n            } while (this.consumeOptionalCharacter($COMMA));\n        }\n        return result;\n    }\n    parseLiteralMap() {\n        const keys = [];\n        const values = [];\n        const start = this.inputIndex;\n        this.expectCharacter($LBRACE);\n        if (!this.consumeOptionalCharacter($RBRACE)) {\n            this.rbracesExpected++;\n            do {\n                const quoted = this.next.isString();\n                const key = this.expectIdentifierOrKeywordOrString();\n                keys.push({ key, quoted });\n                this.expectCharacter($COLON);\n                values.push(this.parsePipe());\n            } while (this.consumeOptionalCharacter($COMMA));\n            this.rbracesExpected--;\n            this.expectCharacter($RBRACE);\n        }\n        return new LiteralMap(this.span(start), this.sourceSpan(start), keys, values);\n    }\n    parseAccessMemberOrMethodCall(receiver, isSafe = false) {\n        const start = receiver.span.start;\n        const nameStart = this.inputIndex;\n        const id = this.expectIdentifierOrKeyword();\n        const nameSpan = this.sourceSpan(nameStart);\n        if (this.consumeOptionalCharacter($LPAREN)) {\n            this.rparensExpected++;\n            const args = this.parseCallArguments();\n            this.expectCharacter($RPAREN);\n            this.rparensExpected--;\n            const span = this.span(start);\n            const sourceSpan = this.sourceSpan(start);\n            return isSafe ? new SafeMethodCall(span, sourceSpan, nameSpan, receiver, id, args) :\n                new MethodCall(span, sourceSpan, nameSpan, receiver, id, args);\n        }\n        else {\n            if (isSafe) {\n                if (this.consumeOptionalOperator('=')) {\n                    this.error('The \\'?.\\' operator cannot be used in the assignment');\n                    return new EmptyExpr(this.span(start), this.sourceSpan(start));\n                }\n                else {\n                    return new SafePropertyRead(this.span(start), this.sourceSpan(start), nameSpan, receiver, id);\n                }\n            }\n            else {\n                if (this.consumeOptionalOperator('=')) {\n                    if (!this.parseAction) {\n                        this.error('Bindings cannot contain assignments');\n                        return new EmptyExpr(this.span(start), this.sourceSpan(start));\n                    }\n                    const value = this.parseConditional();\n                    return new PropertyWrite(this.span(start), this.sourceSpan(start), nameSpan, receiver, id, value);\n                }\n                else {\n                    return new PropertyRead(this.span(start), this.sourceSpan(start), nameSpan, receiver, id);\n                }\n            }\n        }\n    }\n    parseCallArguments() {\n        if (this.next.isCharacter($RPAREN))\n            return [];\n        const positionals = [];\n        do {\n            positionals.push(this.parsePipe());\n        } while (this.consumeOptionalCharacter($COMMA));\n        return positionals;\n    }\n    /**\n     * Parses an identifier, a keyword, a string with an optional `-` in between,\n     * and returns the string along with its absolute source span.\n     */\n    expectTemplateBindingKey() {\n        let result = '';\n        let operatorFound = false;\n        const start = this.currentAbsoluteOffset;\n        do {\n            result += this.expectIdentifierOrKeywordOrString();\n            operatorFound = this.consumeOptionalOperator('-');\n            if (operatorFound) {\n                result += '-';\n            }\n        } while (operatorFound);\n        return {\n            source: result,\n            span: new AbsoluteSourceSpan(start, start + result.length),\n        };\n    }\n    /**\n     * Parse microsyntax template expression and return a list of bindings or\n     * parsing errors in case the given expression is invalid.\n     *\n     * For example,\n     * ```\n     *   <div *ngFor=\"let item of items; index as i; trackBy: func\">\n     * ```\n     * contains five bindings:\n     * 1. ngFor -> null\n     * 2. item -> NgForOfContext.$implicit\n     * 3. ngForOf -> items\n     * 4. i -> NgForOfContext.index\n     * 5. ngForTrackBy -> func\n     *\n     * For a full description of the microsyntax grammar, see\n     * https://gist.github.com/mhevery/d3530294cff2e4a1b3fe15ff75d08855\n     *\n     * @param templateKey name of the microsyntax directive, like ngIf, ngFor,\n     * without the *, along with its absolute span.\n     */\n    parseTemplateBindings(templateKey) {\n        const bindings = [];\n        // The first binding is for the template key itself\n        // In *ngFor=\"let item of items\", key = \"ngFor\", value = null\n        // In *ngIf=\"cond | pipe\", key = \"ngIf\", value = \"cond | pipe\"\n        bindings.push(...this.parseDirectiveKeywordBindings(templateKey));\n        while (this.index < this.tokens.length) {\n            // If it starts with 'let', then this must be variable declaration\n            const letBinding = this.parseLetBinding();\n            if (letBinding) {\n                bindings.push(letBinding);\n            }\n            else {\n                // Two possible cases here, either `value \"as\" key` or\n                // \"directive-keyword expression\". We don't know which case, but both\n                // \"value\" and \"directive-keyword\" are template binding key, so consume\n                // the key first.\n                const key = this.expectTemplateBindingKey();\n                // Peek at the next token, if it is \"as\" then this must be variable\n                // declaration.\n                const binding = this.parseAsBinding(key);\n                if (binding) {\n                    bindings.push(binding);\n                }\n                else {\n                    // Otherwise the key must be a directive keyword, like \"of\". Transform\n                    // the key to actual key. Eg. of -> ngForOf, trackBy -> ngForTrackBy\n                    key.source = templateKey.source + key.source[0].toUpperCase() + key.source.substring(1);\n                    bindings.push(...this.parseDirectiveKeywordBindings(key));\n                }\n            }\n            this.consumeStatementTerminator();\n        }\n        return new TemplateBindingParseResult(bindings, [] /* warnings */, this.errors);\n    }\n    /**\n     * Parse a directive keyword, followed by a mandatory expression.\n     * For example, \"of items\", \"trackBy: func\".\n     * The bindings are: ngForOf -> items, ngForTrackBy -> func\n     * There could be an optional \"as\" binding that follows the expression.\n     * For example,\n     * ```\n     *   *ngFor=\"let item of items | slice:0:1 as collection\".\n     *                    ^^ ^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^\n     *               keyword    bound target   optional 'as' binding\n     * ```\n     *\n     * @param key binding key, for example, ngFor, ngIf, ngForOf, along with its\n     * absolute span.\n     */\n    parseDirectiveKeywordBindings(key) {\n        const bindings = [];\n        this.consumeOptionalCharacter($COLON); // trackBy: trackByFunction\n        const value = this.getDirectiveBoundTarget();\n        let spanEnd = this.currentAbsoluteOffset;\n        // The binding could optionally be followed by \"as\". For example,\n        // *ngIf=\"cond | pipe as x\". In this case, the key in the \"as\" binding\n        // is \"x\" and the value is the template key itself (\"ngIf\"). Note that the\n        // 'key' in the current context now becomes the \"value\" in the next binding.\n        const asBinding = this.parseAsBinding(key);\n        if (!asBinding) {\n            this.consumeStatementTerminator();\n            spanEnd = this.currentAbsoluteOffset;\n        }\n        const sourceSpan = new AbsoluteSourceSpan(key.span.start, spanEnd);\n        bindings.push(new ExpressionBinding(sourceSpan, key, value));\n        if (asBinding) {\n            bindings.push(asBinding);\n        }\n        return bindings;\n    }\n    /**\n     * Return the expression AST for the bound target of a directive keyword\n     * binding. For example,\n     * ```\n     *   *ngIf=\"condition | pipe\"\n     *          ^^^^^^^^^^^^^^^^ bound target for \"ngIf\"\n     *   *ngFor=\"let item of items\"\n     *                       ^^^^^ bound target for \"ngForOf\"\n     * ```\n     */\n    getDirectiveBoundTarget() {\n        if (this.next === EOF || this.peekKeywordAs() || this.peekKeywordLet()) {\n            return null;\n        }\n        const ast = this.parsePipe(); // example: \"condition | async\"\n        const { start, end } = ast.span;\n        const value = this.input.substring(start, end);\n        return new ASTWithSource(ast, value, this.location, this.absoluteOffset + start, this.errors);\n    }\n    /**\n     * Return the binding for a variable declared using `as`. Note that the order\n     * of the key-value pair in this declaration is reversed. For example,\n     * ```\n     *   *ngFor=\"let item of items; index as i\"\n     *                              ^^^^^    ^\n     *                              value    key\n     * ```\n     *\n     * @param value name of the value in the declaration, \"ngIf\" in the example\n     * above, along with its absolute span.\n     */\n    parseAsBinding(value) {\n        if (!this.peekKeywordAs()) {\n            return null;\n        }\n        this.advance(); // consume the 'as' keyword\n        const key = this.expectTemplateBindingKey();\n        this.consumeStatementTerminator();\n        const sourceSpan = new AbsoluteSourceSpan(value.span.start, this.currentAbsoluteOffset);\n        return new VariableBinding(sourceSpan, key, value);\n    }\n    /**\n     * Return the binding for a variable declared using `let`. For example,\n     * ```\n     *   *ngFor=\"let item of items; let i=index;\"\n     *           ^^^^^^^^           ^^^^^^^^^^^\n     * ```\n     * In the first binding, `item` is bound to `NgForOfContext.$implicit`.\n     * In the second binding, `i` is bound to `NgForOfContext.index`.\n     */\n    parseLetBinding() {\n        if (!this.peekKeywordLet()) {\n            return null;\n        }\n        const spanStart = this.currentAbsoluteOffset;\n        this.advance(); // consume the 'let' keyword\n        const key = this.expectTemplateBindingKey();\n        let value = null;\n        if (this.consumeOptionalOperator('=')) {\n            value = this.expectTemplateBindingKey();\n        }\n        this.consumeStatementTerminator();\n        const sourceSpan = new AbsoluteSourceSpan(spanStart, this.currentAbsoluteOffset);\n        return new VariableBinding(sourceSpan, key, value);\n    }\n    /**\n     * Consume the optional statement terminator: semicolon or comma.\n     */\n    consumeStatementTerminator() {\n        this.consumeOptionalCharacter($SEMICOLON) || this.consumeOptionalCharacter($COMMA);\n    }\n    error(message, index = null) {\n        this.errors.push(new ParserError(message, this.input, this.locationText(index), this.location));\n        this.skip();\n    }\n    locationText(index = null) {\n        if (index == null)\n            index = this.index;\n        return (index < this.tokens.length) ? `at column ${this.tokens[index].index + 1} in` :\n            `at the end of the expression`;\n    }\n    // Error recovery should skip tokens until it encounters a recovery point. skip() treats\n    // the end of input and a ';' as unconditionally a recovery point. It also treats ')',\n    // '}' and ']' as conditional recovery points if one of calling productions is expecting\n    // one of these symbols. This allows skip() to recover from errors such as '(a.) + 1' allowing\n    // more of the AST to be retained (it doesn't skip any tokens as the ')' is retained because\n    // of the '(' begins an '(' <expr> ')' production). The recovery points of grouping symbols\n    // must be conditional as they must be skipped if none of the calling productions are not\n    // expecting the closing token else we will never make progress in the case of an\n    // extraneous group closing symbol (such as a stray ')'). This is not the case for ';' because\n    // parseChain() is always the root production and it expects a ';'.\n    // If a production expects one of these token it increments the corresponding nesting count,\n    // and then decrements it just prior to checking if the token is in the input.\n    skip() {\n        let n = this.next;\n        while (this.index < this.tokens.length && !n.isCharacter($SEMICOLON) &&\n            (this.rparensExpected <= 0 || !n.isCharacter($RPAREN)) &&\n            (this.rbracesExpected <= 0 || !n.isCharacter($RBRACE)) &&\n            (this.rbracketsExpected <= 0 || !n.isCharacter($RBRACKET))) {\n            if (this.next.isError()) {\n                this.errors.push(new ParserError(this.next.toString(), this.input, this.locationText(), this.location));\n            }\n            this.advance();\n            n = this.next;\n        }\n    }\n}\nclass SimpleExpressionChecker {\n    constructor() {\n        this.errors = [];\n    }\n    visitImplicitReceiver(ast, context) { }\n    visitInterpolation(ast, context) { }\n    visitLiteralPrimitive(ast, context) { }\n    visitPropertyRead(ast, context) { }\n    visitPropertyWrite(ast, context) { }\n    visitSafePropertyRead(ast, context) { }\n    visitMethodCall(ast, context) { }\n    visitSafeMethodCall(ast, context) { }\n    visitFunctionCall(ast, context) { }\n    visitLiteralArray(ast, context) {\n        this.visitAll(ast.expressions, context);\n    }\n    visitLiteralMap(ast, context) {\n        this.visitAll(ast.values, context);\n    }\n    visitUnary(ast, context) { }\n    visitBinary(ast, context) { }\n    visitPrefixNot(ast, context) { }\n    visitNonNullAssert(ast, context) { }\n    visitConditional(ast, context) { }\n    visitPipe(ast, context) {\n        this.errors.push('pipes');\n    }\n    visitKeyedRead(ast, context) { }\n    visitKeyedWrite(ast, context) { }\n    visitAll(asts, context) {\n        return asts.map(node => node.visit(this, context));\n    }\n    visitChain(ast, context) { }\n    visitQuote(ast, context) { }\n}\n/**\n * This class implements SimpleExpressionChecker used in View Engine and performs more strict checks\n * to make sure host bindings do not contain pipes. In View Engine, having pipes in host bindings is\n * not supported as well, but in some cases (like `!(value | async)`) the error is not triggered at\n * compile time. In order to preserve View Engine behavior, more strict checks are introduced for\n * Ivy mode only.\n */\nclass IvySimpleExpressionChecker extends RecursiveAstVisitor$1 {\n    constructor() {\n        super(...arguments);\n        this.errors = [];\n    }\n    visitPipe() {\n        this.errors.push('pipes');\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// =================================================================================================\n// =================================================================================================\n// =========== S T O P   -  S T O P   -  S T O P   -  S T O P   -  S T O P   -  S T O P  ===========\n// =================================================================================================\n// =================================================================================================\n//\n//        DO NOT EDIT THIS LIST OF SECURITY SENSITIVE PROPERTIES WITHOUT A SECURITY REVIEW!\n//                               Reach out to mprobst for details.\n//\n// =================================================================================================\n/** Map from tagName|propertyName SecurityContext. Properties applying to all tags use '*'. */\nlet _SECURITY_SCHEMA;\nfunction SECURITY_SCHEMA() {\n    if (!_SECURITY_SCHEMA) {\n        _SECURITY_SCHEMA = {};\n        // Case is insignificant below, all element and attribute names are lower-cased for lookup.\n        registerContext(SecurityContext.HTML, [\n            'iframe|srcdoc',\n            '*|innerHTML',\n            '*|outerHTML',\n        ]);\n        registerContext(SecurityContext.STYLE, ['*|style']);\n        // NB: no SCRIPT contexts here, they are never allowed due to the parser stripping them.\n        registerContext(SecurityContext.URL, [\n            '*|formAction', 'area|href', 'area|ping', 'audio|src', 'a|href',\n            'a|ping', 'blockquote|cite', 'body|background', 'del|cite', 'form|action',\n            'img|src', 'img|srcset', 'input|src', 'ins|cite', 'q|cite',\n            'source|src', 'source|srcset', 'track|src', 'video|poster', 'video|src',\n        ]);\n        registerContext(SecurityContext.RESOURCE_URL, [\n            'applet|code',\n            'applet|codebase',\n            'base|href',\n            'embed|src',\n            'frame|src',\n            'head|profile',\n            'html|manifest',\n            'iframe|src',\n            'link|href',\n            'media|src',\n            'object|codebase',\n            'object|data',\n            'script|src',\n        ]);\n    }\n    return _SECURITY_SCHEMA;\n}\nfunction registerContext(ctx, specs) {\n    for (const spec of specs)\n        _SECURITY_SCHEMA[spec.toLowerCase()] = ctx;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass ElementSchemaRegistry {\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst BOOLEAN = 'boolean';\nconst NUMBER = 'number';\nconst STRING = 'string';\nconst OBJECT = 'object';\n/**\n * This array represents the DOM schema. It encodes inheritance, properties, and events.\n *\n * ## Overview\n *\n * Each line represents one kind of element. The `element_inheritance` and properties are joined\n * using `element_inheritance|properties` syntax.\n *\n * ## Element Inheritance\n *\n * The `element_inheritance` can be further subdivided as `element1,element2,...^parentElement`.\n * Here the individual elements are separated by `,` (commas). Every element in the list\n * has identical properties.\n *\n * An `element` may inherit additional properties from `parentElement` If no `^parentElement` is\n * specified then `\"\"` (blank) element is assumed.\n *\n * NOTE: The blank element inherits from root `[Element]` element, the super element of all\n * elements.\n *\n * NOTE an element prefix such as `:svg:` has no special meaning to the schema.\n *\n * ## Properties\n *\n * Each element has a set of properties separated by `,` (commas). Each property can be prefixed\n * by a special character designating its type:\n *\n * - (no prefix): property is a string.\n * - `*`: property represents an event.\n * - `!`: property is a boolean.\n * - `#`: property is a number.\n * - `%`: property is an object.\n *\n * ## Query\n *\n * The class creates an internal squas representation which allows to easily answer the query of\n * if a given property exist on a given element.\n *\n * NOTE: We don't yet support querying for types or events.\n * NOTE: This schema is auto extracted from `schema_extractor.ts` located in the test folder,\n *       see dom_element_schema_registry_spec.ts\n */\n// =================================================================================================\n// =================================================================================================\n// =========== S T O P   -  S T O P   -  S T O P   -  S T O P   -  S T O P   -  S T O P  ===========\n// =================================================================================================\n// =================================================================================================\n//\n//                       DO NOT EDIT THIS DOM SCHEMA WITHOUT A SECURITY REVIEW!\n//\n// Newly added properties must be security reviewed and assigned an appropriate SecurityContext in\n// dom_security_schema.ts. Reach out to mprobst & rjamet for details.\n//\n// =================================================================================================\nconst SCHEMA = [\n    '[Element]|textContent,%classList,className,id,innerHTML,*beforecopy,*beforecut,*beforepaste,*copy,*cut,*paste,*search,*selectstart,*webkitfullscreenchange,*webkitfullscreenerror,*wheel,outerHTML,#scrollLeft,#scrollTop,slot' +\n        /* added manually to avoid breaking changes */\n        ',*message,*mozfullscreenchange,*mozfullscreenerror,*mozpointerlockchange,*mozpointerlockerror,*webglcontextcreationerror,*webglcontextlost,*webglcontextrestored',\n    '[HTMLElement]^[Element]|accessKey,contentEditable,dir,!draggable,!hidden,innerText,lang,*abort,*auxclick,*blur,*cancel,*canplay,*canplaythrough,*change,*click,*close,*contextmenu,*cuechange,*dblclick,*drag,*dragend,*dragenter,*dragleave,*dragover,*dragstart,*drop,*durationchange,*emptied,*ended,*error,*focus,*gotpointercapture,*input,*invalid,*keydown,*keypress,*keyup,*load,*loadeddata,*loadedmetadata,*loadstart,*lostpointercapture,*mousedown,*mouseenter,*mouseleave,*mousemove,*mouseout,*mouseover,*mouseup,*mousewheel,*pause,*play,*playing,*pointercancel,*pointerdown,*pointerenter,*pointerleave,*pointermove,*pointerout,*pointerover,*pointerup,*progress,*ratechange,*reset,*resize,*scroll,*seeked,*seeking,*select,*show,*stalled,*submit,*suspend,*timeupdate,*toggle,*volumechange,*waiting,outerText,!spellcheck,%style,#tabIndex,title,!translate',\n    'abbr,address,article,aside,b,bdi,bdo,cite,code,dd,dfn,dt,em,figcaption,figure,footer,header,i,kbd,main,mark,nav,noscript,rb,rp,rt,rtc,ruby,s,samp,section,small,strong,sub,sup,u,var,wbr^[HTMLElement]|accessKey,contentEditable,dir,!draggable,!hidden,innerText,lang,*abort,*auxclick,*blur,*cancel,*canplay,*canplaythrough,*change,*click,*close,*contextmenu,*cuechange,*dblclick,*drag,*dragend,*dragenter,*dragleave,*dragover,*dragstart,*drop,*durationchange,*emptied,*ended,*error,*focus,*gotpointercapture,*input,*invalid,*keydown,*keypress,*keyup,*load,*loadeddata,*loadedmetadata,*loadstart,*lostpointercapture,*mousedown,*mouseenter,*mouseleave,*mousemove,*mouseout,*mouseover,*mouseup,*mousewheel,*pause,*play,*playing,*pointercancel,*pointerdown,*pointerenter,*pointerleave,*pointermove,*pointerout,*pointerover,*pointerup,*progress,*ratechange,*reset,*resize,*scroll,*seeked,*seeking,*select,*show,*stalled,*submit,*suspend,*timeupdate,*toggle,*volumechange,*waiting,outerText,!spellcheck,%style,#tabIndex,title,!translate',\n    'media^[HTMLElement]|!autoplay,!controls,%controlsList,%crossOrigin,#currentTime,!defaultMuted,#defaultPlaybackRate,!disableRemotePlayback,!loop,!muted,*encrypted,*waitingforkey,#playbackRate,preload,src,%srcObject,#volume',\n    ':svg:^[HTMLElement]|*abort,*auxclick,*blur,*cancel,*canplay,*canplaythrough,*change,*click,*close,*contextmenu,*cuechange,*dblclick,*drag,*dragend,*dragenter,*dragleave,*dragover,*dragstart,*drop,*durationchange,*emptied,*ended,*error,*focus,*gotpointercapture,*input,*invalid,*keydown,*keypress,*keyup,*load,*loadeddata,*loadedmetadata,*loadstart,*lostpointercapture,*mousedown,*mouseenter,*mouseleave,*mousemove,*mouseout,*mouseover,*mouseup,*mousewheel,*pause,*play,*playing,*pointercancel,*pointerdown,*pointerenter,*pointerleave,*pointermove,*pointerout,*pointerover,*pointerup,*progress,*ratechange,*reset,*resize,*scroll,*seeked,*seeking,*select,*show,*stalled,*submit,*suspend,*timeupdate,*toggle,*volumechange,*waiting,%style,#tabIndex',\n    ':svg:graphics^:svg:|',\n    ':svg:animation^:svg:|*begin,*end,*repeat',\n    ':svg:geometry^:svg:|',\n    ':svg:componentTransferFunction^:svg:|',\n    ':svg:gradient^:svg:|',\n    ':svg:textContent^:svg:graphics|',\n    ':svg:textPositioning^:svg:textContent|',\n    'a^[HTMLElement]|charset,coords,download,hash,host,hostname,href,hreflang,name,password,pathname,ping,port,protocol,referrerPolicy,rel,rev,search,shape,target,text,type,username',\n    'area^[HTMLElement]|alt,coords,download,hash,host,hostname,href,!noHref,password,pathname,ping,port,protocol,referrerPolicy,rel,search,shape,target,username',\n    'audio^media|',\n    'br^[HTMLElement]|clear',\n    'base^[HTMLElement]|href,target',\n    'body^[HTMLElement]|aLink,background,bgColor,link,*beforeunload,*blur,*error,*focus,*hashchange,*languagechange,*load,*message,*offline,*online,*pagehide,*pageshow,*popstate,*rejectionhandled,*resize,*scroll,*storage,*unhandledrejection,*unload,text,vLink',\n    'button^[HTMLElement]|!autofocus,!disabled,formAction,formEnctype,formMethod,!formNoValidate,formTarget,name,type,value',\n    'canvas^[HTMLElement]|#height,#width',\n    'content^[HTMLElement]|select',\n    'dl^[HTMLElement]|!compact',\n    'datalist^[HTMLElement]|',\n    'details^[HTMLElement]|!open',\n    'dialog^[HTMLElement]|!open,returnValue',\n    'dir^[HTMLElement]|!compact',\n    'div^[HTMLElement]|align',\n    'embed^[HTMLElement]|align,height,name,src,type,width',\n    'fieldset^[HTMLElement]|!disabled,name',\n    'font^[HTMLElement]|color,face,size',\n    'form^[HTMLElement]|acceptCharset,action,autocomplete,encoding,enctype,method,name,!noValidate,target',\n    'frame^[HTMLElement]|frameBorder,longDesc,marginHeight,marginWidth,name,!noResize,scrolling,src',\n    'frameset^[HTMLElement]|cols,*beforeunload,*blur,*error,*focus,*hashchange,*languagechange,*load,*message,*offline,*online,*pagehide,*pageshow,*popstate,*rejectionhandled,*resize,*scroll,*storage,*unhandledrejection,*unload,rows',\n    'hr^[HTMLElement]|align,color,!noShade,size,width',\n    'head^[HTMLElement]|',\n    'h1,h2,h3,h4,h5,h6^[HTMLElement]|align',\n    'html^[HTMLElement]|version',\n    'iframe^[HTMLElement]|align,!allowFullscreen,frameBorder,height,longDesc,marginHeight,marginWidth,name,referrerPolicy,%sandbox,scrolling,src,srcdoc,width',\n    'img^[HTMLElement]|align,alt,border,%crossOrigin,#height,#hspace,!isMap,longDesc,lowsrc,name,referrerPolicy,sizes,src,srcset,useMap,#vspace,#width',\n    'input^[HTMLElement]|accept,align,alt,autocapitalize,autocomplete,!autofocus,!checked,!defaultChecked,defaultValue,dirName,!disabled,%files,formAction,formEnctype,formMethod,!formNoValidate,formTarget,#height,!incremental,!indeterminate,max,#maxLength,min,#minLength,!multiple,name,pattern,placeholder,!readOnly,!required,selectionDirection,#selectionEnd,#selectionStart,#size,src,step,type,useMap,value,%valueAsDate,#valueAsNumber,#width',\n    'li^[HTMLElement]|type,#value',\n    'label^[HTMLElement]|htmlFor',\n    'legend^[HTMLElement]|align',\n    'link^[HTMLElement]|as,charset,%crossOrigin,!disabled,href,hreflang,integrity,media,referrerPolicy,rel,%relList,rev,%sizes,target,type',\n    'map^[HTMLElement]|name',\n    'marquee^[HTMLElement]|behavior,bgColor,direction,height,#hspace,#loop,#scrollAmount,#scrollDelay,!trueSpeed,#vspace,width',\n    'menu^[HTMLElement]|!compact',\n    'meta^[HTMLElement]|content,httpEquiv,name,scheme',\n    'meter^[HTMLElement]|#high,#low,#max,#min,#optimum,#value',\n    'ins,del^[HTMLElement]|cite,dateTime',\n    'ol^[HTMLElement]|!compact,!reversed,#start,type',\n    'object^[HTMLElement]|align,archive,border,code,codeBase,codeType,data,!declare,height,#hspace,name,standby,type,useMap,#vspace,width',\n    'optgroup^[HTMLElement]|!disabled,label',\n    'option^[HTMLElement]|!defaultSelected,!disabled,label,!selected,text,value',\n    'output^[HTMLElement]|defaultValue,%htmlFor,name,value',\n    'p^[HTMLElement]|align',\n    'param^[HTMLElement]|name,type,value,valueType',\n    'picture^[HTMLElement]|',\n    'pre^[HTMLElement]|#width',\n    'progress^[HTMLElement]|#max,#value',\n    'q,blockquote,cite^[HTMLElement]|',\n    'script^[HTMLElement]|!async,charset,%crossOrigin,!defer,event,htmlFor,integrity,src,text,type',\n    'select^[HTMLElement]|!autofocus,!disabled,#length,!multiple,name,!required,#selectedIndex,#size,value',\n    'shadow^[HTMLElement]|',\n    'slot^[HTMLElement]|name',\n    'source^[HTMLElement]|media,sizes,src,srcset,type',\n    'span^[HTMLElement]|',\n    'style^[HTMLElement]|!disabled,media,type',\n    'caption^[HTMLElement]|align',\n    'th,td^[HTMLElement]|abbr,align,axis,bgColor,ch,chOff,#colSpan,headers,height,!noWrap,#rowSpan,scope,vAlign,width',\n    'col,colgroup^[HTMLElement]|align,ch,chOff,#span,vAlign,width',\n    'table^[HTMLElement]|align,bgColor,border,%caption,cellPadding,cellSpacing,frame,rules,summary,%tFoot,%tHead,width',\n    'tr^[HTMLElement]|align,bgColor,ch,chOff,vAlign',\n    'tfoot,thead,tbody^[HTMLElement]|align,ch,chOff,vAlign',\n    'template^[HTMLElement]|',\n    'textarea^[HTMLElement]|autocapitalize,!autofocus,#cols,defaultValue,dirName,!disabled,#maxLength,#minLength,name,placeholder,!readOnly,!required,#rows,selectionDirection,#selectionEnd,#selectionStart,value,wrap',\n    'title^[HTMLElement]|text',\n    'track^[HTMLElement]|!default,kind,label,src,srclang',\n    'ul^[HTMLElement]|!compact,type',\n    'unknown^[HTMLElement]|',\n    'video^media|#height,poster,#width',\n    ':svg:a^:svg:graphics|',\n    ':svg:animate^:svg:animation|',\n    ':svg:animateMotion^:svg:animation|',\n    ':svg:animateTransform^:svg:animation|',\n    ':svg:circle^:svg:geometry|',\n    ':svg:clipPath^:svg:graphics|',\n    ':svg:defs^:svg:graphics|',\n    ':svg:desc^:svg:|',\n    ':svg:discard^:svg:|',\n    ':svg:ellipse^:svg:geometry|',\n    ':svg:feBlend^:svg:|',\n    ':svg:feColorMatrix^:svg:|',\n    ':svg:feComponentTransfer^:svg:|',\n    ':svg:feComposite^:svg:|',\n    ':svg:feConvolveMatrix^:svg:|',\n    ':svg:feDiffuseLighting^:svg:|',\n    ':svg:feDisplacementMap^:svg:|',\n    ':svg:feDistantLight^:svg:|',\n    ':svg:feDropShadow^:svg:|',\n    ':svg:feFlood^:svg:|',\n    ':svg:feFuncA^:svg:componentTransferFunction|',\n    ':svg:feFuncB^:svg:componentTransferFunction|',\n    ':svg:feFuncG^:svg:componentTransferFunction|',\n    ':svg:feFuncR^:svg:componentTransferFunction|',\n    ':svg:feGaussianBlur^:svg:|',\n    ':svg:feImage^:svg:|',\n    ':svg:feMerge^:svg:|',\n    ':svg:feMergeNode^:svg:|',\n    ':svg:feMorphology^:svg:|',\n    ':svg:feOffset^:svg:|',\n    ':svg:fePointLight^:svg:|',\n    ':svg:feSpecularLighting^:svg:|',\n    ':svg:feSpotLight^:svg:|',\n    ':svg:feTile^:svg:|',\n    ':svg:feTurbulence^:svg:|',\n    ':svg:filter^:svg:|',\n    ':svg:foreignObject^:svg:graphics|',\n    ':svg:g^:svg:graphics|',\n    ':svg:image^:svg:graphics|',\n    ':svg:line^:svg:geometry|',\n    ':svg:linearGradient^:svg:gradient|',\n    ':svg:mpath^:svg:|',\n    ':svg:marker^:svg:|',\n    ':svg:mask^:svg:|',\n    ':svg:metadata^:svg:|',\n    ':svg:path^:svg:geometry|',\n    ':svg:pattern^:svg:|',\n    ':svg:polygon^:svg:geometry|',\n    ':svg:polyline^:svg:geometry|',\n    ':svg:radialGradient^:svg:gradient|',\n    ':svg:rect^:svg:geometry|',\n    ':svg:svg^:svg:graphics|#currentScale,#zoomAndPan',\n    ':svg:script^:svg:|type',\n    ':svg:set^:svg:animation|',\n    ':svg:stop^:svg:|',\n    ':svg:style^:svg:|!disabled,media,title,type',\n    ':svg:switch^:svg:graphics|',\n    ':svg:symbol^:svg:|',\n    ':svg:tspan^:svg:textPositioning|',\n    ':svg:text^:svg:textPositioning|',\n    ':svg:textPath^:svg:textContent|',\n    ':svg:title^:svg:|',\n    ':svg:use^:svg:graphics|',\n    ':svg:view^:svg:|#zoomAndPan',\n    'data^[HTMLElement]|value',\n    'keygen^[HTMLElement]|!autofocus,challenge,!disabled,form,keytype,name',\n    'menuitem^[HTMLElement]|type,label,icon,!disabled,!checked,radiogroup,!default',\n    'summary^[HTMLElement]|',\n    'time^[HTMLElement]|dateTime',\n    ':svg:cursor^:svg:|',\n];\nconst _ATTR_TO_PROP = {\n    'class': 'className',\n    'for': 'htmlFor',\n    'formaction': 'formAction',\n    'innerHtml': 'innerHTML',\n    'readonly': 'readOnly',\n    'tabindex': 'tabIndex',\n};\nclass DomElementSchemaRegistry extends ElementSchemaRegistry {\n    constructor() {\n        super();\n        this._schema = {};\n        SCHEMA.forEach(encodedType => {\n            const type = {};\n            const [strType, strProperties] = encodedType.split('|');\n            const properties = strProperties.split(',');\n            const [typeNames, superName] = strType.split('^');\n            typeNames.split(',').forEach(tag => this._schema[tag.toLowerCase()] = type);\n            const superType = superName && this._schema[superName.toLowerCase()];\n            if (superType) {\n                Object.keys(superType).forEach((prop) => {\n                    type[prop] = superType[prop];\n                });\n            }\n            properties.forEach((property) => {\n                if (property.length > 0) {\n                    switch (property[0]) {\n                        case '*':\n                            // We don't yet support events.\n                            // If ever allowing to bind to events, GO THROUGH A SECURITY REVIEW, allowing events\n                            // will\n                            // almost certainly introduce bad XSS vulnerabilities.\n                            // type[property.substring(1)] = EVENT;\n                            break;\n                        case '!':\n                            type[property.substring(1)] = BOOLEAN;\n                            break;\n                        case '#':\n                            type[property.substring(1)] = NUMBER;\n                            break;\n                        case '%':\n                            type[property.substring(1)] = OBJECT;\n                            break;\n                        default:\n                            type[property] = STRING;\n                    }\n                }\n            });\n        });\n    }\n    hasProperty(tagName, propName, schemaMetas) {\n        if (schemaMetas.some((schema) => schema.name === NO_ERRORS_SCHEMA.name)) {\n            return true;\n        }\n        if (tagName.indexOf('-') > -1) {\n            if (isNgContainer(tagName) || isNgContent(tagName)) {\n                return false;\n            }\n            if (schemaMetas.some((schema) => schema.name === CUSTOM_ELEMENTS_SCHEMA.name)) {\n                // Can't tell now as we don't know which properties a custom element will get\n                // once it is instantiated\n                return true;\n            }\n        }\n        const elementProperties = this._schema[tagName.toLowerCase()] || this._schema['unknown'];\n        return !!elementProperties[propName];\n    }\n    hasElement(tagName, schemaMetas) {\n        if (schemaMetas.some((schema) => schema.name === NO_ERRORS_SCHEMA.name)) {\n            return true;\n        }\n        if (tagName.indexOf('-') > -1) {\n            if (isNgContainer(tagName) || isNgContent(tagName)) {\n                return true;\n            }\n            if (schemaMetas.some((schema) => schema.name === CUSTOM_ELEMENTS_SCHEMA.name)) {\n                // Allow any custom elements\n                return true;\n            }\n        }\n        return !!this._schema[tagName.toLowerCase()];\n    }\n    /**\n     * securityContext returns the security context for the given property on the given DOM tag.\n     *\n     * Tag and property name are statically known and cannot change at runtime, i.e. it is not\n     * possible to bind a value into a changing attribute or tag name.\n     *\n     * The filtering is based on a list of allowed tags|attributes. All attributes in the schema\n     * above are assumed to have the 'NONE' security context, i.e. that they are safe inert\n     * string values. Only specific well known attack vectors are assigned their appropriate context.\n     */\n    securityContext(tagName, propName, isAttribute) {\n        if (isAttribute) {\n            // NB: For security purposes, use the mapped property name, not the attribute name.\n            propName = this.getMappedPropName(propName);\n        }\n        // Make sure comparisons are case insensitive, so that case differences between attribute and\n        // property names do not have a security impact.\n        tagName = tagName.toLowerCase();\n        propName = propName.toLowerCase();\n        let ctx = SECURITY_SCHEMA()[tagName + '|' + propName];\n        if (ctx) {\n            return ctx;\n        }\n        ctx = SECURITY_SCHEMA()['*|' + propName];\n        return ctx ? ctx : SecurityContext.NONE;\n    }\n    getMappedPropName(propName) {\n        return _ATTR_TO_PROP[propName] || propName;\n    }\n    getDefaultComponentElementName() {\n        return 'ng-component';\n    }\n    validateProperty(name) {\n        if (name.toLowerCase().startsWith('on')) {\n            const msg = `Binding to event property '${name}' is disallowed for security reasons, ` +\n                `please use (${name.slice(2)})=...` +\n                `\\nIf '${name}' is a directive input, make sure the directive is imported by the` +\n                ` current module.`;\n            return { error: true, msg: msg };\n        }\n        else {\n            return { error: false };\n        }\n    }\n    validateAttribute(name) {\n        if (name.toLowerCase().startsWith('on')) {\n            const msg = `Binding to event attribute '${name}' is disallowed for security reasons, ` +\n                `please use (${name.slice(2)})=...`;\n            return { error: true, msg: msg };\n        }\n        else {\n            return { error: false };\n        }\n    }\n    allKnownElementNames() {\n        return Object.keys(this._schema);\n    }\n    normalizeAnimationStyleProperty(propName) {\n        return dashCaseToCamelCase(propName);\n    }\n    normalizeAnimationStyleValue(camelCaseProp, userProvidedProp, val) {\n        let unit = '';\n        const strVal = val.toString().trim();\n        let errorMsg = null;\n        if (_isPixelDimensionStyle(camelCaseProp) && val !== 0 && val !== '0') {\n            if (typeof val === 'number') {\n                unit = 'px';\n            }\n            else {\n                const valAndSuffixMatch = val.match(/^[+-]?[\\d\\.]+([a-z]*)$/);\n                if (valAndSuffixMatch && valAndSuffixMatch[1].length == 0) {\n                    errorMsg = `Please provide a CSS unit value for ${userProvidedProp}:${val}`;\n                }\n            }\n        }\n        return { error: errorMsg, value: strVal + unit };\n    }\n}\nfunction _isPixelDimensionStyle(prop) {\n    switch (prop) {\n        case 'width':\n        case 'height':\n        case 'minWidth':\n        case 'minHeight':\n        case 'maxWidth':\n        case 'maxHeight':\n        case 'left':\n        case 'top':\n        case 'bottom':\n        case 'right':\n        case 'fontSize':\n        case 'outlineWidth':\n        case 'outlineOffset':\n        case 'paddingTop':\n        case 'paddingLeft':\n        case 'paddingBottom':\n        case 'paddingRight':\n        case 'marginTop':\n        case 'marginLeft':\n        case 'marginBottom':\n        case 'marginRight':\n        case 'borderRadius':\n        case 'borderWidth':\n        case 'borderTopWidth':\n        case 'borderLeftWidth':\n        case 'borderRightWidth':\n        case 'borderBottomWidth':\n        case 'textIndent':\n            return true;\n        default:\n            return false;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst BIND_NAME_REGEXP$1 = /^(?:(?:(?:(bind-)|(let-)|(ref-|#)|(on-)|(bindon-)|(@))(.*))|\\[\\(([^\\)]+)\\)\\]|\\[([^\\]]+)\\]|\\(([^\\)]+)\\))$/;\n// Group 1 = \"bind-\"\nconst KW_BIND_IDX$1 = 1;\n// Group 2 = \"let-\"\nconst KW_LET_IDX$1 = 2;\n// Group 3 = \"ref-/#\"\nconst KW_REF_IDX$1 = 3;\n// Group 4 = \"on-\"\nconst KW_ON_IDX$1 = 4;\n// Group 5 = \"bindon-\"\nconst KW_BINDON_IDX$1 = 5;\n// Group 6 = \"@\"\nconst KW_AT_IDX$1 = 6;\n// Group 7 = the identifier after \"bind-\", \"let-\", \"ref-/#\", \"on-\", \"bindon-\" or \"@\"\nconst IDENT_KW_IDX$1 = 7;\n// Group 8 = identifier inside [()]\nconst IDENT_BANANA_BOX_IDX$1 = 8;\n// Group 9 = identifier inside []\nconst IDENT_PROPERTY_IDX$1 = 9;\n// Group 10 = identifier inside ()\nconst IDENT_EVENT_IDX$1 = 10;\nconst TEMPLATE_ATTR_PREFIX$2 = '*';\nfunction htmlAstToRender3Ast(htmlNodes, bindingParser) {\n    const transformer = new HtmlAstToIvyAst(bindingParser);\n    const ivyNodes = visitAll$1(transformer, htmlNodes);\n    // Errors might originate in either the binding parser or the html to ivy transformer\n    const allErrors = bindingParser.errors.concat(transformer.errors);\n    return {\n        nodes: ivyNodes,\n        errors: allErrors,\n        styleUrls: transformer.styleUrls,\n        styles: transformer.styles,\n        ngContentSelectors: transformer.ngContentSelectors,\n    };\n}\nclass HtmlAstToIvyAst {\n    constructor(bindingParser) {\n        this.bindingParser = bindingParser;\n        this.errors = [];\n        this.styles = [];\n        this.styleUrls = [];\n        this.ngContentSelectors = [];\n        this.inI18nBlock = false;\n    }\n    // HTML visitor\n    visitElement(element) {\n        const isI18nRootElement = isI18nRootNode(element.i18n);\n        if (isI18nRootElement) {\n            if (this.inI18nBlock) {\n                this.reportError('Cannot mark an element as translatable inside of a translatable section. Please remove the nested i18n marker.', element.sourceSpan);\n            }\n            this.inI18nBlock = true;\n        }\n        const preparsedElement = preparseElement(element);\n        if (preparsedElement.type === PreparsedElementType.SCRIPT) {\n            return null;\n        }\n        else if (preparsedElement.type === PreparsedElementType.STYLE) {\n            const contents = textContents(element);\n            if (contents !== null) {\n                this.styles.push(contents);\n            }\n            return null;\n        }\n        else if (preparsedElement.type === PreparsedElementType.STYLESHEET &&\n            isStyleUrlResolvable(preparsedElement.hrefAttr)) {\n            this.styleUrls.push(preparsedElement.hrefAttr);\n            return null;\n        }\n        // Whether the element is a `<ng-template>`\n        const isTemplateElement = isNgTemplate(element.name);\n        const parsedProperties = [];\n        const boundEvents = [];\n        const variables = [];\n        const references = [];\n        const attributes = [];\n        const i18nAttrsMeta = {};\n        const templateParsedProperties = [];\n        const templateVariables = [];\n        // Whether the element has any *-attribute\n        let elementHasInlineTemplate = false;\n        for (const attribute of element.attrs) {\n            let hasBinding = false;\n            const normalizedName = normalizeAttributeName(attribute.name);\n            // `*attr` defines template bindings\n            let isTemplateBinding = false;\n            if (attribute.i18n) {\n                i18nAttrsMeta[attribute.name] = attribute.i18n;\n            }\n            if (normalizedName.startsWith(TEMPLATE_ATTR_PREFIX$2)) {\n                // *-attributes\n                if (elementHasInlineTemplate) {\n                    this.reportError(`Can't have multiple template bindings on one element. Use only one attribute prefixed with *`, attribute.sourceSpan);\n                }\n                isTemplateBinding = true;\n                elementHasInlineTemplate = true;\n                const templateValue = attribute.value;\n                const templateKey = normalizedName.substring(TEMPLATE_ATTR_PREFIX$2.length);\n                const parsedVariables = [];\n                const absoluteValueOffset = attribute.valueSpan ?\n                    attribute.valueSpan.start.offset :\n                    // If there is no value span the attribute does not have a value, like `attr` in\n                    //`<div attr></div>`. In this case, point to one character beyond the last character of\n                    // the attribute name.\n                    attribute.sourceSpan.start.offset + attribute.name.length;\n                this.bindingParser.parseInlineTemplateBinding(templateKey, templateValue, attribute.sourceSpan, absoluteValueOffset, [], templateParsedProperties, parsedVariables);\n                templateVariables.push(...parsedVariables.map(v => new Variable(v.name, v.value, v.sourceSpan, v.valueSpan)));\n            }\n            else {\n                // Check for variables, events, property bindings, interpolation\n                hasBinding = this.parseAttribute(isTemplateElement, attribute, [], parsedProperties, boundEvents, variables, references);\n            }\n            if (!hasBinding && !isTemplateBinding) {\n                // don't include the bindings as attributes as well in the AST\n                attributes.push(this.visitAttribute(attribute));\n            }\n        }\n        const children = visitAll$1(preparsedElement.nonBindable ? NON_BINDABLE_VISITOR$1 : this, element.children);\n        let parsedElement;\n        if (preparsedElement.type === PreparsedElementType.NG_CONTENT) {\n            // `<ng-content>`\n            if (element.children &&\n                !element.children.every((node) => isEmptyTextNode(node) || isCommentNode(node))) {\n                this.reportError(`<ng-content> element cannot have content.`, element.sourceSpan);\n            }\n            const selector = preparsedElement.selectAttr;\n            const attrs = element.attrs.map(attr => this.visitAttribute(attr));\n            parsedElement = new Content(selector, attrs, element.sourceSpan, element.i18n);\n            this.ngContentSelectors.push(selector);\n        }\n        else if (isTemplateElement) {\n            // `<ng-template>`\n            const attrs = this.extractAttributes(element.name, parsedProperties, i18nAttrsMeta);\n            parsedElement = new Template(element.name, attributes, attrs.bound, boundEvents, [ /* no template attributes */], children, references, variables, element.sourceSpan, element.startSourceSpan, element.endSourceSpan, element.i18n);\n        }\n        else {\n            const attrs = this.extractAttributes(element.name, parsedProperties, i18nAttrsMeta);\n            parsedElement = new Element(element.name, attributes, attrs.bound, boundEvents, children, references, element.sourceSpan, element.startSourceSpan, element.endSourceSpan, element.i18n);\n        }\n        if (elementHasInlineTemplate) {\n            // If this node is an inline-template (e.g. has *ngFor) then we need to create a template\n            // node that contains this node.\n            // Moreover, if the node is an element, then we need to hoist its attributes to the template\n            // node for matching against content projection selectors.\n            const attrs = this.extractAttributes('ng-template', templateParsedProperties, i18nAttrsMeta);\n            const templateAttrs = [];\n            attrs.literal.forEach(attr => templateAttrs.push(attr));\n            attrs.bound.forEach(attr => templateAttrs.push(attr));\n            const hoistedAttrs = parsedElement instanceof Element ?\n                {\n                    attributes: parsedElement.attributes,\n                    inputs: parsedElement.inputs,\n                    outputs: parsedElement.outputs,\n                } :\n                { attributes: [], inputs: [], outputs: [] };\n            // For <ng-template>s with structural directives on them, avoid passing i18n information to\n            // the wrapping template to prevent unnecessary i18n instructions from being generated. The\n            // necessary i18n meta information will be extracted from child elements.\n            const i18n = isTemplateElement && isI18nRootElement ? undefined : element.i18n;\n            // TODO(pk): test for this case\n            parsedElement = new Template(parsedElement.name, hoistedAttrs.attributes, hoistedAttrs.inputs, hoistedAttrs.outputs, templateAttrs, [parsedElement], [ /* no references */], templateVariables, element.sourceSpan, element.startSourceSpan, element.endSourceSpan, i18n);\n        }\n        if (isI18nRootElement) {\n            this.inI18nBlock = false;\n        }\n        return parsedElement;\n    }\n    visitAttribute(attribute) {\n        return new TextAttribute(attribute.name, attribute.value, attribute.sourceSpan, attribute.valueSpan, attribute.i18n);\n    }\n    visitText(text) {\n        return this._visitTextWithInterpolation(text.value, text.sourceSpan, text.i18n);\n    }\n    visitExpansion(expansion) {\n        if (!expansion.i18n) {\n            // do not generate Icu in case it was created\n            // outside of i18n block in a template\n            return null;\n        }\n        if (!isI18nRootNode(expansion.i18n)) {\n            throw new Error(`Invalid type \"${expansion.i18n.constructor}\" for \"i18n\" property of ${expansion.sourceSpan.toString()}. Expected a \"Message\"`);\n        }\n        const message = expansion.i18n;\n        const vars = {};\n        const placeholders = {};\n        // extract VARs from ICUs - we process them separately while\n        // assembling resulting message via goog.getMsg function, since\n        // we need to pass them to top-level goog.getMsg call\n        Object.keys(message.placeholders).forEach(key => {\n            const value = message.placeholders[key];\n            if (key.startsWith(I18N_ICU_VAR_PREFIX)) {\n                const config = this.bindingParser.interpolationConfig;\n                // ICU expression is a plain string, not wrapped into start\n                // and end tags, so we wrap it before passing to binding parser\n                const wrapped = `${config.start}${value}${config.end}`;\n                // Currently when the `plural` or `select` keywords in an ICU contain trailing spaces (e.g.\n                // `{count, select , ...}`), these spaces are also included into the key names in ICU vars\n                // (e.g. \"VAR_SELECT \"). These trailing spaces are not desirable, since they will later be\n                // converted into `_` symbols while normalizing placeholder names, which might lead to\n                // mismatches at runtime (i.e. placeholder will not be replaced with the correct value).\n                const formattedKey = key.trim();\n                vars[formattedKey] =\n                    this._visitTextWithInterpolation(wrapped, expansion.sourceSpan);\n            }\n            else {\n                placeholders[key] = this._visitTextWithInterpolation(value, expansion.sourceSpan);\n            }\n        });\n        return new Icu(vars, placeholders, expansion.sourceSpan, message);\n    }\n    visitExpansionCase(expansionCase) {\n        return null;\n    }\n    visitComment(comment) {\n        return null;\n    }\n    // convert view engine `ParsedProperty` to a format suitable for IVY\n    extractAttributes(elementName, properties, i18nPropsMeta) {\n        const bound = [];\n        const literal = [];\n        properties.forEach(prop => {\n            const i18n = i18nPropsMeta[prop.name];\n            if (prop.isLiteral) {\n                literal.push(new TextAttribute(prop.name, prop.expression.source || '', prop.sourceSpan, undefined, i18n));\n            }\n            else {\n                // Note that validation is skipped and property mapping is disabled\n                // due to the fact that we need to make sure a given prop is not an\n                // input of a directive and directive matching happens at runtime.\n                const bep = this.bindingParser.createBoundElementProperty(elementName, prop, /* skipValidation */ true, /* mapPropertyName */ false);\n                bound.push(BoundAttribute.fromBoundElementProperty(bep, i18n));\n            }\n        });\n        return { bound, literal };\n    }\n    parseAttribute(isTemplateElement, attribute, matchableAttributes, parsedProperties, boundEvents, variables, references) {\n        const name = normalizeAttributeName(attribute.name);\n        const value = attribute.value;\n        const srcSpan = attribute.sourceSpan;\n        const absoluteOffset = attribute.valueSpan ? attribute.valueSpan.start.offset : srcSpan.start.offset;\n        const bindParts = name.match(BIND_NAME_REGEXP$1);\n        let hasBinding = false;\n        if (bindParts) {\n            hasBinding = true;\n            if (bindParts[KW_BIND_IDX$1] != null) {\n                this.bindingParser.parsePropertyBinding(bindParts[IDENT_KW_IDX$1], value, false, srcSpan, absoluteOffset, attribute.valueSpan, matchableAttributes, parsedProperties);\n            }\n            else if (bindParts[KW_LET_IDX$1]) {\n                if (isTemplateElement) {\n                    const identifier = bindParts[IDENT_KW_IDX$1];\n                    this.parseVariable(identifier, value, srcSpan, attribute.valueSpan, variables);\n                }\n                else {\n                    this.reportError(`\"let-\" is only supported on ng-template elements.`, srcSpan);\n                }\n            }\n            else if (bindParts[KW_REF_IDX$1]) {\n                const identifier = bindParts[IDENT_KW_IDX$1];\n                this.parseReference(identifier, value, srcSpan, attribute.valueSpan, references);\n            }\n            else if (bindParts[KW_ON_IDX$1]) {\n                const events = [];\n                this.bindingParser.parseEvent(bindParts[IDENT_KW_IDX$1], value, srcSpan, attribute.valueSpan || srcSpan, matchableAttributes, events);\n                addEvents(events, boundEvents);\n            }\n            else if (bindParts[KW_BINDON_IDX$1]) {\n                this.bindingParser.parsePropertyBinding(bindParts[IDENT_KW_IDX$1], value, false, srcSpan, absoluteOffset, attribute.valueSpan, matchableAttributes, parsedProperties);\n                this.parseAssignmentEvent(bindParts[IDENT_KW_IDX$1], value, srcSpan, attribute.valueSpan, matchableAttributes, boundEvents);\n            }\n            else if (bindParts[KW_AT_IDX$1]) {\n                this.bindingParser.parseLiteralAttr(name, value, srcSpan, absoluteOffset, attribute.valueSpan, matchableAttributes, parsedProperties);\n            }\n            else if (bindParts[IDENT_BANANA_BOX_IDX$1]) {\n                this.bindingParser.parsePropertyBinding(bindParts[IDENT_BANANA_BOX_IDX$1], value, false, srcSpan, absoluteOffset, attribute.valueSpan, matchableAttributes, parsedProperties);\n                this.parseAssignmentEvent(bindParts[IDENT_BANANA_BOX_IDX$1], value, srcSpan, attribute.valueSpan, matchableAttributes, boundEvents);\n            }\n            else if (bindParts[IDENT_PROPERTY_IDX$1]) {\n                this.bindingParser.parsePropertyBinding(bindParts[IDENT_PROPERTY_IDX$1], value, false, srcSpan, absoluteOffset, attribute.valueSpan, matchableAttributes, parsedProperties);\n            }\n            else if (bindParts[IDENT_EVENT_IDX$1]) {\n                const events = [];\n                this.bindingParser.parseEvent(bindParts[IDENT_EVENT_IDX$1], value, srcSpan, attribute.valueSpan || srcSpan, matchableAttributes, events);\n                addEvents(events, boundEvents);\n            }\n        }\n        else {\n            hasBinding = this.bindingParser.parsePropertyInterpolation(name, value, srcSpan, attribute.valueSpan, matchableAttributes, parsedProperties);\n        }\n        return hasBinding;\n    }\n    _visitTextWithInterpolation(value, sourceSpan, i18n) {\n        const valueNoNgsp = replaceNgsp(value);\n        const expr = this.bindingParser.parseInterpolation(valueNoNgsp, sourceSpan);\n        return expr ? new BoundText(expr, sourceSpan, i18n) : new Text(valueNoNgsp, sourceSpan);\n    }\n    parseVariable(identifier, value, sourceSpan, valueSpan, variables) {\n        if (identifier.indexOf('-') > -1) {\n            this.reportError(`\"-\" is not allowed in variable names`, sourceSpan);\n        }\n        else if (identifier.length === 0) {\n            this.reportError(`Variable does not have a name`, sourceSpan);\n        }\n        variables.push(new Variable(identifier, value, sourceSpan, valueSpan));\n    }\n    parseReference(identifier, value, sourceSpan, valueSpan, references) {\n        if (identifier.indexOf('-') > -1) {\n            this.reportError(`\"-\" is not allowed in reference names`, sourceSpan);\n        }\n        else if (identifier.length === 0) {\n            this.reportError(`Reference does not have a name`, sourceSpan);\n        }\n        references.push(new Reference(identifier, value, sourceSpan, valueSpan));\n    }\n    parseAssignmentEvent(name, expression, sourceSpan, valueSpan, targetMatchableAttrs, boundEvents) {\n        const events = [];\n        this.bindingParser.parseEvent(`${name}Change`, `${expression}=$event`, sourceSpan, valueSpan || sourceSpan, targetMatchableAttrs, events);\n        addEvents(events, boundEvents);\n    }\n    reportError(message, sourceSpan, level = ParseErrorLevel.ERROR) {\n        this.errors.push(new ParseError(sourceSpan, message, level));\n    }\n}\nclass NonBindableVisitor$1 {\n    visitElement(ast) {\n        const preparsedElement = preparseElement(ast);\n        if (preparsedElement.type === PreparsedElementType.SCRIPT ||\n            preparsedElement.type === PreparsedElementType.STYLE ||\n            preparsedElement.type === PreparsedElementType.STYLESHEET) {\n            // Skipping <script> for security reasons\n            // Skipping <style> and stylesheets as we already processed them\n            // in the StyleCompiler\n            return null;\n        }\n        const children = visitAll$1(this, ast.children, null);\n        return new Element(ast.name, visitAll$1(this, ast.attrs), \n        /* inputs */ [], /* outputs */ [], children, /* references */ [], ast.sourceSpan, ast.startSourceSpan, ast.endSourceSpan);\n    }\n    visitComment(comment) {\n        return null;\n    }\n    visitAttribute(attribute) {\n        return new TextAttribute(attribute.name, attribute.value, attribute.sourceSpan, undefined, attribute.i18n);\n    }\n    visitText(text) {\n        return new Text(text.value, text.sourceSpan);\n    }\n    visitExpansion(expansion) {\n        return null;\n    }\n    visitExpansionCase(expansionCase) {\n        return null;\n    }\n}\nconst NON_BINDABLE_VISITOR$1 = new NonBindableVisitor$1();\nfunction normalizeAttributeName(attrName) {\n    return /^data-/i.test(attrName) ? attrName.substring(5) : attrName;\n}\nfunction addEvents(events, boundEvents) {\n    boundEvents.push(...events.map(e => BoundEvent.fromParsedEvent(e)));\n}\nfunction isEmptyTextNode(node) {\n    return node instanceof Text$3 && node.value.trim().length == 0;\n}\nfunction isCommentNode(node) {\n    return node instanceof Comment;\n}\nfunction textContents(node) {\n    if (node.children.length !== 1 || !(node.children[0] instanceof Text$3)) {\n        return null;\n    }\n    else {\n        return node.children[0].value;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nvar TagType;\n(function (TagType) {\n    TagType[TagType[\"ELEMENT\"] = 0] = \"ELEMENT\";\n    TagType[TagType[\"TEMPLATE\"] = 1] = \"TEMPLATE\";\n    TagType[TagType[\"PROJECTION\"] = 2] = \"PROJECTION\";\n})(TagType || (TagType = {}));\n/**\n * Generates an object that is used as a shared state between parent and all child contexts.\n */\nfunction setupRegistry() {\n    return { getUniqueId: getSeqNumberGenerator(), icus: new Map() };\n}\n/**\n * I18nContext is a helper class which keeps track of all i18n-related aspects\n * (accumulates placeholders, bindings, etc) between i18nStart and i18nEnd instructions.\n *\n * When we enter a nested template, the top-level context is being passed down\n * to the nested component, which uses this context to generate a child instance\n * of I18nContext class (to handle nested template) and at the end, reconciles it back\n * with the parent context.\n *\n * @param index Instruction index of i18nStart, which initiates this context\n * @param ref Reference to a translation const that represents the content if thus context\n * @param level Nestng level defined for child contexts\n * @param templateIndex Instruction index of a template which this context belongs to\n * @param meta Meta information (id, meaning, description, etc) associated with this context\n */\nclass I18nContext {\n    constructor(index, ref, level = 0, templateIndex = null, meta, registry) {\n        this.index = index;\n        this.ref = ref;\n        this.level = level;\n        this.templateIndex = templateIndex;\n        this.meta = meta;\n        this.registry = registry;\n        this.bindings = new Set();\n        this.placeholders = new Map();\n        this.isEmitted = false;\n        this._unresolvedCtxCount = 0;\n        this._registry = registry || setupRegistry();\n        this.id = this._registry.getUniqueId();\n    }\n    appendTag(type, node, index, closed) {\n        if (node.isVoid && closed) {\n            return; // ignore \"close\" for void tags\n        }\n        const ph = node.isVoid || !closed ? node.startName : node.closeName;\n        const content = { type, index, ctx: this.id, isVoid: node.isVoid, closed };\n        updatePlaceholderMap(this.placeholders, ph, content);\n    }\n    get icus() {\n        return this._registry.icus;\n    }\n    get isRoot() {\n        return this.level === 0;\n    }\n    get isResolved() {\n        return this._unresolvedCtxCount === 0;\n    }\n    getSerializedPlaceholders() {\n        const result = new Map();\n        this.placeholders.forEach((values, key) => result.set(key, values.map(serializePlaceholderValue)));\n        return result;\n    }\n    // public API to accumulate i18n-related content\n    appendBinding(binding) {\n        this.bindings.add(binding);\n    }\n    appendIcu(name, ref) {\n        updatePlaceholderMap(this._registry.icus, name, ref);\n    }\n    appendBoundText(node) {\n        const phs = assembleBoundTextPlaceholders(node, this.bindings.size, this.id);\n        phs.forEach((values, key) => updatePlaceholderMap(this.placeholders, key, ...values));\n    }\n    appendTemplate(node, index) {\n        // add open and close tags at the same time,\n        // since we process nested templates separately\n        this.appendTag(TagType.TEMPLATE, node, index, false);\n        this.appendTag(TagType.TEMPLATE, node, index, true);\n        this._unresolvedCtxCount++;\n    }\n    appendElement(node, index, closed) {\n        this.appendTag(TagType.ELEMENT, node, index, closed);\n    }\n    appendProjection(node, index) {\n        // add open and close tags at the same time,\n        // since we process projected content separately\n        this.appendTag(TagType.PROJECTION, node, index, false);\n        this.appendTag(TagType.PROJECTION, node, index, true);\n    }\n    /**\n     * Generates an instance of a child context based on the root one,\n     * when we enter a nested template within I18n section.\n     *\n     * @param index Instruction index of corresponding i18nStart, which initiates this context\n     * @param templateIndex Instruction index of a template which this context belongs to\n     * @param meta Meta information (id, meaning, description, etc) associated with this context\n     *\n     * @returns I18nContext instance\n     */\n    forkChildContext(index, templateIndex, meta) {\n        return new I18nContext(index, this.ref, this.level + 1, templateIndex, meta, this._registry);\n    }\n    /**\n     * Reconciles child context into parent one once the end of the i18n block is reached (i18nEnd).\n     *\n     * @param context Child I18nContext instance to be reconciled with parent context.\n     */\n    reconcileChildContext(context) {\n        // set the right context id for open and close\n        // template tags, so we can use it as sub-block ids\n        ['start', 'close'].forEach((op) => {\n            const key = context.meta[`${op}Name`];\n            const phs = this.placeholders.get(key) || [];\n            const tag = phs.find(findTemplateFn(this.id, context.templateIndex));\n            if (tag) {\n                tag.ctx = context.id;\n            }\n        });\n        // reconcile placeholders\n        const childPhs = context.placeholders;\n        childPhs.forEach((values, key) => {\n            const phs = this.placeholders.get(key);\n            if (!phs) {\n                this.placeholders.set(key, values);\n                return;\n            }\n            // try to find matching template...\n            const tmplIdx = phs.findIndex(findTemplateFn(context.id, context.templateIndex));\n            if (tmplIdx >= 0) {\n                // ... if found - replace it with nested template content\n                const isCloseTag = key.startsWith('CLOSE');\n                const isTemplateTag = key.endsWith('NG-TEMPLATE');\n                if (isTemplateTag) {\n                    // current template's content is placed before or after\n                    // parent template tag, depending on the open/close atrribute\n                    phs.splice(tmplIdx + (isCloseTag ? 0 : 1), 0, ...values);\n                }\n                else {\n                    const idx = isCloseTag ? values.length - 1 : 0;\n                    values[idx].tmpl = phs[tmplIdx];\n                    phs.splice(tmplIdx, 1, ...values);\n                }\n            }\n            else {\n                // ... otherwise just append content to placeholder value\n                phs.push(...values);\n            }\n            this.placeholders.set(key, phs);\n        });\n        this._unresolvedCtxCount--;\n    }\n}\n//\n// Helper methods\n//\nfunction wrap(symbol, index, contextId, closed) {\n    const state = closed ? '/' : '';\n    return wrapI18nPlaceholder(`${state}${symbol}${index}`, contextId);\n}\nfunction wrapTag(symbol, { index, ctx, isVoid }, closed) {\n    return isVoid ? wrap(symbol, index, ctx) + wrap(symbol, index, ctx, true) :\n        wrap(symbol, index, ctx, closed);\n}\nfunction findTemplateFn(ctx, templateIndex) {\n    return (token) => typeof token === 'object' && token.type === TagType.TEMPLATE &&\n        token.index === templateIndex && token.ctx === ctx;\n}\nfunction serializePlaceholderValue(value) {\n    const element = (data, closed) => wrapTag('#', data, closed);\n    const template = (data, closed) => wrapTag('*', data, closed);\n    const projection = (data, closed) => wrapTag('!', data, closed);\n    switch (value.type) {\n        case TagType.ELEMENT:\n            // close element tag\n            if (value.closed) {\n                return element(value, true) + (value.tmpl ? template(value.tmpl, true) : '');\n            }\n            // open element tag that also initiates a template\n            if (value.tmpl) {\n                return template(value.tmpl) + element(value) +\n                    (value.isVoid ? template(value.tmpl, true) : '');\n            }\n            return element(value);\n        case TagType.TEMPLATE:\n            return template(value, value.closed);\n        case TagType.PROJECTION:\n            return projection(value, value.closed);\n        default:\n            return value;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass IcuSerializerVisitor {\n    visitText(text) {\n        return text.value;\n    }\n    visitContainer(container) {\n        return container.children.map(child => child.visit(this)).join('');\n    }\n    visitIcu(icu) {\n        const strCases = Object.keys(icu.cases).map((k) => `${k} {${icu.cases[k].visit(this)}}`);\n        const result = `{${icu.expressionPlaceholder}, ${icu.type}, ${strCases.join(' ')}}`;\n        return result;\n    }\n    visitTagPlaceholder(ph) {\n        return ph.isVoid ?\n            this.formatPh(ph.startName) :\n            `${this.formatPh(ph.startName)}${ph.children.map(child => child.visit(this)).join('')}${this.formatPh(ph.closeName)}`;\n    }\n    visitPlaceholder(ph) {\n        return this.formatPh(ph.name);\n    }\n    visitIcuPlaceholder(ph, context) {\n        return this.formatPh(ph.name);\n    }\n    formatPh(value) {\n        return `{${formatI18nPlaceholderName(value, /* useCamelCase */ false)}}`;\n    }\n}\nconst serializer = new IcuSerializerVisitor();\nfunction serializeIcuNode(icu) {\n    return icu.visit(serializer);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst TAG_TO_PLACEHOLDER_NAMES = {\n    'A': 'LINK',\n    'B': 'BOLD_TEXT',\n    'BR': 'LINE_BREAK',\n    'EM': 'EMPHASISED_TEXT',\n    'H1': 'HEADING_LEVEL1',\n    'H2': 'HEADING_LEVEL2',\n    'H3': 'HEADING_LEVEL3',\n    'H4': 'HEADING_LEVEL4',\n    'H5': 'HEADING_LEVEL5',\n    'H6': 'HEADING_LEVEL6',\n    'HR': 'HORIZONTAL_RULE',\n    'I': 'ITALIC_TEXT',\n    'LI': 'LIST_ITEM',\n    'LINK': 'MEDIA_LINK',\n    'OL': 'ORDERED_LIST',\n    'P': 'PARAGRAPH',\n    'Q': 'QUOTATION',\n    'S': 'STRIKETHROUGH_TEXT',\n    'SMALL': 'SMALL_TEXT',\n    'SUB': 'SUBSTRIPT',\n    'SUP': 'SUPERSCRIPT',\n    'TBODY': 'TABLE_BODY',\n    'TD': 'TABLE_CELL',\n    'TFOOT': 'TABLE_FOOTER',\n    'TH': 'TABLE_HEADER_CELL',\n    'THEAD': 'TABLE_HEADER',\n    'TR': 'TABLE_ROW',\n    'TT': 'MONOSPACED_TEXT',\n    'U': 'UNDERLINED_TEXT',\n    'UL': 'UNORDERED_LIST',\n};\n/**\n * Creates unique names for placeholder with different content.\n *\n * Returns the same placeholder name when the content is identical.\n */\nclass PlaceholderRegistry {\n    constructor() {\n        // Count the occurrence of the base name top generate a unique name\n        this._placeHolderNameCounts = {};\n        // Maps signature to placeholder names\n        this._signatureToName = {};\n    }\n    getStartTagPlaceholderName(tag, attrs, isVoid) {\n        const signature = this._hashTag(tag, attrs, isVoid);\n        if (this._signatureToName[signature]) {\n            return this._signatureToName[signature];\n        }\n        const upperTag = tag.toUpperCase();\n        const baseName = TAG_TO_PLACEHOLDER_NAMES[upperTag] || `TAG_${upperTag}`;\n        const name = this._generateUniqueName(isVoid ? baseName : `START_${baseName}`);\n        this._signatureToName[signature] = name;\n        return name;\n    }\n    getCloseTagPlaceholderName(tag) {\n        const signature = this._hashClosingTag(tag);\n        if (this._signatureToName[signature]) {\n            return this._signatureToName[signature];\n        }\n        const upperTag = tag.toUpperCase();\n        const baseName = TAG_TO_PLACEHOLDER_NAMES[upperTag] || `TAG_${upperTag}`;\n        const name = this._generateUniqueName(`CLOSE_${baseName}`);\n        this._signatureToName[signature] = name;\n        return name;\n    }\n    getPlaceholderName(name, content) {\n        const upperName = name.toUpperCase();\n        const signature = `PH: ${upperName}=${content}`;\n        if (this._signatureToName[signature]) {\n            return this._signatureToName[signature];\n        }\n        const uniqueName = this._generateUniqueName(upperName);\n        this._signatureToName[signature] = uniqueName;\n        return uniqueName;\n    }\n    getUniquePlaceholder(name) {\n        return this._generateUniqueName(name.toUpperCase());\n    }\n    // Generate a hash for a tag - does not take attribute order into account\n    _hashTag(tag, attrs, isVoid) {\n        const start = `<${tag}`;\n        const strAttrs = Object.keys(attrs).sort().map((name) => ` ${name}=${attrs[name]}`).join('');\n        const end = isVoid ? '/>' : `></${tag}>`;\n        return start + strAttrs + end;\n    }\n    _hashClosingTag(tag) {\n        return this._hashTag(`/${tag}`, {}, false);\n    }\n    _generateUniqueName(base) {\n        const seen = this._placeHolderNameCounts.hasOwnProperty(base);\n        if (!seen) {\n            this._placeHolderNameCounts[base] = 1;\n            return base;\n        }\n        const id = this._placeHolderNameCounts[base];\n        this._placeHolderNameCounts[base] = id + 1;\n        return `${base}_${id}`;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst _expParser = new Parser$1(new Lexer());\n/**\n * Returns a function converting html nodes to an i18n Message given an interpolationConfig\n */\nfunction createI18nMessageFactory(interpolationConfig) {\n    const visitor = new _I18nVisitor(_expParser, interpolationConfig);\n    return (nodes, meaning, description, customId, visitNodeFn) => visitor.toI18nMessage(nodes, meaning, description, customId, visitNodeFn);\n}\nfunction noopVisitNodeFn(_html, i18n) {\n    return i18n;\n}\nclass _I18nVisitor {\n    constructor(_expressionParser, _interpolationConfig) {\n        this._expressionParser = _expressionParser;\n        this._interpolationConfig = _interpolationConfig;\n    }\n    toI18nMessage(nodes, meaning = '', description = '', customId = '', visitNodeFn) {\n        const context = {\n            isIcu: nodes.length == 1 && nodes[0] instanceof Expansion,\n            icuDepth: 0,\n            placeholderRegistry: new PlaceholderRegistry(),\n            placeholderToContent: {},\n            placeholderToMessage: {},\n            visitNodeFn: visitNodeFn || noopVisitNodeFn,\n        };\n        const i18nodes = visitAll$1(this, nodes, context);\n        return new Message(i18nodes, context.placeholderToContent, context.placeholderToMessage, meaning, description, customId);\n    }\n    visitElement(el, context) {\n        const children = visitAll$1(this, el.children, context);\n        const attrs = {};\n        el.attrs.forEach(attr => {\n            // Do not visit the attributes, translatable ones are top-level ASTs\n            attrs[attr.name] = attr.value;\n        });\n        const isVoid = getHtmlTagDefinition(el.name).isVoid;\n        const startPhName = context.placeholderRegistry.getStartTagPlaceholderName(el.name, attrs, isVoid);\n        context.placeholderToContent[startPhName] = el.sourceSpan.toString();\n        let closePhName = '';\n        if (!isVoid) {\n            closePhName = context.placeholderRegistry.getCloseTagPlaceholderName(el.name);\n            context.placeholderToContent[closePhName] = `</${el.name}>`;\n        }\n        const node = new TagPlaceholder(el.name, attrs, startPhName, closePhName, children, isVoid, el.sourceSpan, el.startSourceSpan, el.endSourceSpan);\n        return context.visitNodeFn(el, node);\n    }\n    visitAttribute(attribute, context) {\n        const node = this._visitTextWithInterpolation(attribute.value, attribute.sourceSpan, context);\n        return context.visitNodeFn(attribute, node);\n    }\n    visitText(text, context) {\n        const node = this._visitTextWithInterpolation(text.value, text.sourceSpan, context);\n        return context.visitNodeFn(text, node);\n    }\n    visitComment(comment, context) {\n        return null;\n    }\n    visitExpansion(icu, context) {\n        context.icuDepth++;\n        const i18nIcuCases = {};\n        const i18nIcu = new Icu$1(icu.switchValue, icu.type, i18nIcuCases, icu.sourceSpan);\n        icu.cases.forEach((caze) => {\n            i18nIcuCases[caze.value] = new Container(caze.expression.map((node) => node.visit(this, context)), caze.expSourceSpan);\n        });\n        context.icuDepth--;\n        if (context.isIcu || context.icuDepth > 0) {\n            // Returns an ICU node when:\n            // - the message (vs a part of the message) is an ICU message, or\n            // - the ICU message is nested.\n            const expPh = context.placeholderRegistry.getUniquePlaceholder(`VAR_${icu.type}`);\n            i18nIcu.expressionPlaceholder = expPh;\n            context.placeholderToContent[expPh] = icu.switchValue;\n            return context.visitNodeFn(icu, i18nIcu);\n        }\n        // Else returns a placeholder\n        // ICU placeholders should not be replaced with their original content but with the their\n        // translations.\n        // TODO(vicb): add a html.Node -> i18n.Message cache to avoid having to re-create the msg\n        const phName = context.placeholderRegistry.getPlaceholderName('ICU', icu.sourceSpan.toString());\n        context.placeholderToMessage[phName] = this.toI18nMessage([icu], '', '', '', undefined);\n        const node = new IcuPlaceholder(i18nIcu, phName, icu.sourceSpan);\n        return context.visitNodeFn(icu, node);\n    }\n    visitExpansionCase(_icuCase, _context) {\n        throw new Error('Unreachable code');\n    }\n    _visitTextWithInterpolation(text, sourceSpan, context) {\n        const splitInterpolation = this._expressionParser.splitInterpolation(text, sourceSpan.start.toString(), this._interpolationConfig);\n        if (!splitInterpolation) {\n            // No expression, return a single text\n            return new Text$1(text, sourceSpan);\n        }\n        // Return a group of text + expressions\n        const nodes = [];\n        const container = new Container(nodes, sourceSpan);\n        const { start: sDelimiter, end: eDelimiter } = this._interpolationConfig;\n        for (let i = 0; i < splitInterpolation.strings.length - 1; i++) {\n            const expression = splitInterpolation.expressions[i];\n            const baseName = _extractPlaceholderName(expression) || 'INTERPOLATION';\n            const phName = context.placeholderRegistry.getPlaceholderName(baseName, expression);\n            if (splitInterpolation.strings[i].length) {\n                // No need to add empty strings\n                const stringSpan = getOffsetSourceSpan(sourceSpan, splitInterpolation.stringSpans[i]);\n                nodes.push(new Text$1(splitInterpolation.strings[i], stringSpan));\n            }\n            const expressionSpan = getOffsetSourceSpan(sourceSpan, splitInterpolation.expressionsSpans[i]);\n            nodes.push(new Placeholder(expression, phName, expressionSpan));\n            context.placeholderToContent[phName] = sDelimiter + expression + eDelimiter;\n        }\n        // The last index contains no expression\n        const lastStringIdx = splitInterpolation.strings.length - 1;\n        if (splitInterpolation.strings[lastStringIdx].length) {\n            const stringSpan = getOffsetSourceSpan(sourceSpan, splitInterpolation.stringSpans[lastStringIdx]);\n            nodes.push(new Text$1(splitInterpolation.strings[lastStringIdx], stringSpan));\n        }\n        return container;\n    }\n}\nfunction getOffsetSourceSpan(sourceSpan, { start, end }) {\n    return new ParseSourceSpan(sourceSpan.start.moveBy(start), sourceSpan.start.moveBy(end));\n}\nconst _CUSTOM_PH_EXP = /\\/\\/[\\s\\S]*i18n[\\s\\S]*\\([\\s\\S]*ph[\\s\\S]*=[\\s\\S]*(\"|')([\\s\\S]*?)\\1[\\s\\S]*\\)/g;\nfunction _extractPlaceholderName(input) {\n    return input.split(_CUSTOM_PH_EXP)[2];\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst setI18nRefs = (htmlNode, i18nNode) => {\n    if (htmlNode instanceof NodeWithI18n) {\n        if (i18nNode instanceof IcuPlaceholder && htmlNode.i18n instanceof Message) {\n            // This html node represents an ICU but this is a second processing pass, and the legacy id\n            // was computed in the previous pass and stored in the `i18n` property as a message.\n            // We are about to wipe out that property so capture the previous message to be reused when\n            // generating the message for this ICU later. See `_generateI18nMessage()`.\n            i18nNode.previousMessage = htmlNode.i18n;\n        }\n        htmlNode.i18n = i18nNode;\n    }\n    return i18nNode;\n};\n/**\n * This visitor walks over HTML parse tree and converts information stored in\n * i18n-related attributes (\"i18n\" and \"i18n-*\") into i18n meta object that is\n * stored with other element's and attribute's information.\n */\nclass I18nMetaVisitor {\n    constructor(interpolationConfig = DEFAULT_INTERPOLATION_CONFIG, keepI18nAttrs = false, enableI18nLegacyMessageIdFormat = false) {\n        this.interpolationConfig = interpolationConfig;\n        this.keepI18nAttrs = keepI18nAttrs;\n        this.enableI18nLegacyMessageIdFormat = enableI18nLegacyMessageIdFormat;\n        // whether visited nodes contain i18n information\n        this.hasI18nMeta = false;\n        // i18n message generation factory\n        this._createI18nMessage = createI18nMessageFactory(this.interpolationConfig);\n    }\n    _generateI18nMessage(nodes, meta = '', visitNodeFn) {\n        const { meaning, description, customId } = this._parseMetadata(meta);\n        const message = this._createI18nMessage(nodes, meaning, description, customId, visitNodeFn);\n        this._setMessageId(message, meta);\n        this._setLegacyIds(message, meta);\n        return message;\n    }\n    visitElement(element) {\n        if (hasI18nAttrs(element)) {\n            this.hasI18nMeta = true;\n            const attrs = [];\n            const attrsMeta = {};\n            for (const attr of element.attrs) {\n                if (attr.name === I18N_ATTR) {\n                    // root 'i18n' node attribute\n                    const i18n = element.i18n || attr.value;\n                    const message = this._generateI18nMessage(element.children, i18n, setI18nRefs);\n                    // do not assign empty i18n meta\n                    if (message.nodes.length) {\n                        element.i18n = message;\n                    }\n                }\n                else if (attr.name.startsWith(I18N_ATTR_PREFIX)) {\n                    // 'i18n-*' attributes\n                    const key = attr.name.slice(I18N_ATTR_PREFIX.length);\n                    attrsMeta[key] = attr.value;\n                }\n                else {\n                    // non-i18n attributes\n                    attrs.push(attr);\n                }\n            }\n            // set i18n meta for attributes\n            if (Object.keys(attrsMeta).length) {\n                for (const attr of attrs) {\n                    const meta = attrsMeta[attr.name];\n                    // do not create translation for empty attributes\n                    if (meta !== undefined && attr.value) {\n                        attr.i18n = this._generateI18nMessage([attr], attr.i18n || meta);\n                    }\n                }\n            }\n            if (!this.keepI18nAttrs) {\n                // update element's attributes,\n                // keeping only non-i18n related ones\n                element.attrs = attrs;\n            }\n        }\n        visitAll$1(this, element.children, element.i18n);\n        return element;\n    }\n    visitExpansion(expansion, currentMessage) {\n        let message;\n        const meta = expansion.i18n;\n        this.hasI18nMeta = true;\n        if (meta instanceof IcuPlaceholder) {\n            // set ICU placeholder name (e.g. \"ICU_1\"),\n            // generated while processing root element contents,\n            // so we can reference it when we output translation\n            const name = meta.name;\n            message = this._generateI18nMessage([expansion], meta);\n            const icu = icuFromI18nMessage(message);\n            icu.name = name;\n        }\n        else {\n            // ICU is a top level message, try to use metadata from container element if provided via\n            // `context` argument. Note: context may not be available for standalone ICUs (without\n            // wrapping element), so fallback to ICU metadata in this case.\n            message = this._generateI18nMessage([expansion], currentMessage || meta);\n        }\n        expansion.i18n = message;\n        return expansion;\n    }\n    visitText(text) {\n        return text;\n    }\n    visitAttribute(attribute) {\n        return attribute;\n    }\n    visitComment(comment) {\n        return comment;\n    }\n    visitExpansionCase(expansionCase) {\n        return expansionCase;\n    }\n    /**\n     * Parse the general form `meta` passed into extract the explicit metadata needed to create a\n     * `Message`.\n     *\n     * There are three possibilities for the `meta` variable\n     * 1) a string from an `i18n` template attribute: parse it to extract the metadata values.\n     * 2) a `Message` from a previous processing pass: reuse the metadata values in the message.\n     * 4) other: ignore this and just process the message metadata as normal\n     *\n     * @param meta the bucket that holds information about the message\n     * @returns the parsed metadata.\n     */\n    _parseMetadata(meta) {\n        return typeof meta === 'string' ? parseI18nMeta(meta) :\n            meta instanceof Message ? meta : {};\n    }\n    /**\n     * Generate (or restore) message id if not specified already.\n     */\n    _setMessageId(message, meta) {\n        if (!message.id) {\n            message.id = meta instanceof Message && meta.id || decimalDigest(message);\n        }\n    }\n    /**\n     * Update the `message` with a `legacyId` if necessary.\n     *\n     * @param message the message whose legacy id should be set\n     * @param meta information about the message being processed\n     */\n    _setLegacyIds(message, meta) {\n        if (this.enableI18nLegacyMessageIdFormat) {\n            message.legacyIds = [computeDigest(message), computeDecimalDigest(message)];\n        }\n        else if (typeof meta !== 'string') {\n            // This occurs if we are doing the 2nd pass after whitespace removal (see `parseTemplate()` in\n            // `packages/compiler/src/render3/view/template.ts`).\n            // In that case we want to reuse the legacy message generated in the 1st pass (see\n            // `setI18nRefs()`).\n            const previousMessage = meta instanceof Message ?\n                meta :\n                meta instanceof IcuPlaceholder ? meta.previousMessage : undefined;\n            message.legacyIds = previousMessage ? previousMessage.legacyIds : [];\n        }\n    }\n}\n/** I18n separators for metadata **/\nconst I18N_MEANING_SEPARATOR = '|';\nconst I18N_ID_SEPARATOR = '@@';\n/**\n * Parses i18n metas like:\n *  - \"@@id\",\n *  - \"description[@@id]\",\n *  - \"meaning|description[@@id]\"\n * and returns an object with parsed output.\n *\n * @param meta String that represents i18n meta\n * @returns Object with id, meaning and description fields\n */\nfunction parseI18nMeta(meta = '') {\n    let customId;\n    let meaning;\n    let description;\n    meta = meta.trim();\n    if (meta) {\n        const idIndex = meta.indexOf(I18N_ID_SEPARATOR);\n        const descIndex = meta.indexOf(I18N_MEANING_SEPARATOR);\n        let meaningAndDesc;\n        [meaningAndDesc, customId] =\n            (idIndex > -1) ? [meta.slice(0, idIndex), meta.slice(idIndex + 2)] : [meta, ''];\n        [meaning, description] = (descIndex > -1) ?\n            [meaningAndDesc.slice(0, descIndex), meaningAndDesc.slice(descIndex + 1)] :\n            ['', meaningAndDesc];\n    }\n    return { customId, meaning, description };\n}\n// Converts i18n meta information for a message (id, description, meaning)\n// to a JsDoc statement formatted as expected by the Closure compiler.\nfunction i18nMetaToJSDoc(meta) {\n    const tags = [];\n    if (meta.description) {\n        tags.push({ tagName: \"desc\" /* Desc */, text: meta.description });\n    }\n    if (meta.meaning) {\n        tags.push({ tagName: \"meaning\" /* Meaning */, text: meta.meaning });\n    }\n    return tags.length == 0 ? null : jsDocComment(tags);\n}\n\n/** Closure uses `goog.getMsg(message)` to lookup translations */\nconst GOOG_GET_MSG = 'goog.getMsg';\nfunction createGoogleGetMsgStatements(variable$1, message, closureVar, params) {\n    const messageString = serializeI18nMessageForGetMsg(message);\n    const args = [literal(messageString)];\n    if (Object.keys(params).length) {\n        args.push(mapLiteral(params, true));\n    }\n    // /**\n    //  * @desc description of message\n    //  * @meaning meaning of message\n    //  */\n    // const MSG_... = goog.getMsg(..);\n    // I18N_X = MSG_...;\n    const googGetMsgStmt = closureVar.set(variable(GOOG_GET_MSG).callFn(args)).toConstDecl();\n    const metaComment = i18nMetaToJSDoc(message);\n    if (metaComment !== null) {\n        googGetMsgStmt.addLeadingComment(metaComment);\n    }\n    const i18nAssignmentStmt = new ExpressionStatement(variable$1.set(closureVar));\n    return [googGetMsgStmt, i18nAssignmentStmt];\n}\n/**\n * This visitor walks over i18n tree and generates its string representation, including ICUs and\n * placeholders in `{$placeholder}` (for plain messages) or `{PLACEHOLDER}` (inside ICUs) format.\n */\nclass GetMsgSerializerVisitor {\n    formatPh(value) {\n        return `{$${formatI18nPlaceholderName(value)}}`;\n    }\n    visitText(text) {\n        return text.value;\n    }\n    visitContainer(container) {\n        return container.children.map(child => child.visit(this)).join('');\n    }\n    visitIcu(icu) {\n        return serializeIcuNode(icu);\n    }\n    visitTagPlaceholder(ph) {\n        return ph.isVoid ?\n            this.formatPh(ph.startName) :\n            `${this.formatPh(ph.startName)}${ph.children.map(child => child.visit(this)).join('')}${this.formatPh(ph.closeName)}`;\n    }\n    visitPlaceholder(ph) {\n        return this.formatPh(ph.name);\n    }\n    visitIcuPlaceholder(ph, context) {\n        return this.formatPh(ph.name);\n    }\n}\nconst serializerVisitor$1 = new GetMsgSerializerVisitor();\nfunction serializeI18nMessageForGetMsg(message) {\n    return message.nodes.map(node => node.visit(serializerVisitor$1, null)).join('');\n}\n\nfunction createLocalizeStatements(variable, message, params) {\n    const { messageParts, placeHolders } = serializeI18nMessageForLocalize(message);\n    const sourceSpan = getSourceSpan(message);\n    const expressions = placeHolders.map(ph => params[ph.text]);\n    const localizedString$1 = localizedString(message, messageParts, placeHolders, expressions, sourceSpan);\n    const variableInitialization = variable.set(localizedString$1);\n    return [new ExpressionStatement(variableInitialization)];\n}\n/**\n * This visitor walks over an i18n tree, capturing literal strings and placeholders.\n *\n * The result can be used for generating the `$localize` tagged template literals.\n */\nclass LocalizeSerializerVisitor {\n    visitText(text, context) {\n        if (context[context.length - 1] instanceof LiteralPiece) {\n            // Two literal pieces in a row means that there was some comment node in-between.\n            context[context.length - 1].text += text.value;\n        }\n        else {\n            context.push(new LiteralPiece(text.value, text.sourceSpan));\n        }\n    }\n    visitContainer(container, context) {\n        container.children.forEach(child => child.visit(this, context));\n    }\n    visitIcu(icu, context) {\n        context.push(new LiteralPiece(serializeIcuNode(icu), icu.sourceSpan));\n    }\n    visitTagPlaceholder(ph, context) {\n        var _a, _b;\n        context.push(this.createPlaceholderPiece(ph.startName, (_a = ph.startSourceSpan) !== null && _a !== void 0 ? _a : ph.sourceSpan));\n        if (!ph.isVoid) {\n            ph.children.forEach(child => child.visit(this, context));\n            context.push(this.createPlaceholderPiece(ph.closeName, (_b = ph.endSourceSpan) !== null && _b !== void 0 ? _b : ph.sourceSpan));\n        }\n    }\n    visitPlaceholder(ph, context) {\n        context.push(this.createPlaceholderPiece(ph.name, ph.sourceSpan));\n    }\n    visitIcuPlaceholder(ph, context) {\n        context.push(this.createPlaceholderPiece(ph.name, ph.sourceSpan));\n    }\n    createPlaceholderPiece(name, sourceSpan) {\n        return new PlaceholderPiece(formatI18nPlaceholderName(name, /* useCamelCase */ false), sourceSpan);\n    }\n}\nconst serializerVisitor$2 = new LocalizeSerializerVisitor();\n/**\n * Serialize an i18n message into two arrays: messageParts and placeholders.\n *\n * These arrays will be used to generate `$localize` tagged template literals.\n *\n * @param message The message to be serialized.\n * @returns an object containing the messageParts and placeholders.\n */\nfunction serializeI18nMessageForLocalize(message) {\n    const pieces = [];\n    message.nodes.forEach(node => node.visit(serializerVisitor$2, pieces));\n    return processMessagePieces(pieces);\n}\nfunction getSourceSpan(message) {\n    const startNode = message.nodes[0];\n    const endNode = message.nodes[message.nodes.length - 1];\n    return new ParseSourceSpan(startNode.sourceSpan.start, endNode.sourceSpan.end, startNode.sourceSpan.details);\n}\n/**\n * Convert the list of serialized MessagePieces into two arrays.\n *\n * One contains the literal string pieces and the other the placeholders that will be replaced by\n * expressions when rendering `$localize` tagged template literals.\n *\n * @param pieces The pieces to process.\n * @returns an object containing the messageParts and placeholders.\n */\nfunction processMessagePieces(pieces) {\n    const messageParts = [];\n    const placeHolders = [];\n    if (pieces[0] instanceof PlaceholderPiece) {\n        // The first piece was a placeholder so we need to add an initial empty message part.\n        messageParts.push(createEmptyMessagePart(pieces[0].sourceSpan.start));\n    }\n    for (let i = 0; i < pieces.length; i++) {\n        const part = pieces[i];\n        if (part instanceof LiteralPiece) {\n            messageParts.push(part);\n        }\n        else {\n            placeHolders.push(part);\n            if (pieces[i - 1] instanceof PlaceholderPiece) {\n                // There were two placeholders in a row, so we need to add an empty message part.\n                messageParts.push(createEmptyMessagePart(part.sourceSpan.end));\n            }\n        }\n    }\n    if (pieces[pieces.length - 1] instanceof PlaceholderPiece) {\n        // The last piece was a placeholder so we need to add a final empty message part.\n        messageParts.push(createEmptyMessagePart(pieces[pieces.length - 1].sourceSpan.end));\n    }\n    return { messageParts, placeHolders };\n}\nfunction createEmptyMessagePart(location) {\n    return new LiteralPiece('', new ParseSourceSpan(location, location));\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// Selector attribute name of `<ng-content>`\nconst NG_CONTENT_SELECT_ATTR$1 = 'select';\n// Attribute name of `ngProjectAs`.\nconst NG_PROJECT_AS_ATTR_NAME = 'ngProjectAs';\n// List of supported global targets for event listeners\nconst GLOBAL_TARGET_RESOLVERS = new Map([['window', Identifiers$1.resolveWindow], ['document', Identifiers$1.resolveDocument], ['body', Identifiers$1.resolveBody]]);\nconst LEADING_TRIVIA_CHARS = [' ', '\\n', '\\r', '\\t'];\n//  if (rf & flags) { .. }\nfunction renderFlagCheckIfStmt(flags, statements) {\n    return ifStmt(variable(RENDER_FLAGS).bitwiseAnd(literal(flags), null, false), statements);\n}\nfunction prepareEventListenerParameters(eventAst, handlerName = null, scope = null) {\n    const { type, name, target, phase, handler } = eventAst;\n    if (target && !GLOBAL_TARGET_RESOLVERS.has(target)) {\n        throw new Error(`Unexpected global target '${target}' defined for '${name}' event.\n        Supported list of global targets: ${Array.from(GLOBAL_TARGET_RESOLVERS.keys())}.`);\n    }\n    const eventArgumentName = '$event';\n    const implicitReceiverAccesses = new Set();\n    const implicitReceiverExpr = (scope === null || scope.bindingLevel === 0) ?\n        variable(CONTEXT_NAME) :\n        scope.getOrCreateSharedContextVar(0);\n    const bindingExpr = convertActionBinding(scope, implicitReceiverExpr, handler, 'b', () => error('Unexpected interpolation'), eventAst.handlerSpan, implicitReceiverAccesses);\n    const statements = [];\n    if (scope) {\n        statements.push(...scope.restoreViewStatement());\n        statements.push(...scope.variableDeclarations());\n    }\n    statements.push(...bindingExpr.render3Stmts);\n    const eventName = type === 1 /* Animation */ ? prepareSyntheticListenerName(name, phase) : name;\n    const fnName = handlerName && sanitizeIdentifier(handlerName);\n    const fnArgs = [];\n    if (implicitReceiverAccesses.has(eventArgumentName)) {\n        fnArgs.push(new FnParam(eventArgumentName, DYNAMIC_TYPE));\n    }\n    const handlerFn = fn(fnArgs, statements, INFERRED_TYPE, null, fnName);\n    const params = [literal(eventName), handlerFn];\n    if (target) {\n        params.push(literal(false), // `useCapture` flag, defaults to `false`\n        importExpr(GLOBAL_TARGET_RESOLVERS.get(target)));\n    }\n    return params;\n}\nfunction createComponentDefConsts() {\n    return { prepareStatements: [], constExpressions: [] };\n}\nclass TemplateDefinitionBuilder {\n    constructor(constantPool, parentBindingScope, level = 0, contextName, i18nContext, templateIndex, templateName, directiveMatcher, directives, pipeTypeByName, pipes, _namespace, relativeContextFilePath, i18nUseExternalIds, _constants = createComponentDefConsts()) {\n        this.constantPool = constantPool;\n        this.level = level;\n        this.contextName = contextName;\n        this.i18nContext = i18nContext;\n        this.templateIndex = templateIndex;\n        this.templateName = templateName;\n        this.directiveMatcher = directiveMatcher;\n        this.directives = directives;\n        this.pipeTypeByName = pipeTypeByName;\n        this.pipes = pipes;\n        this._namespace = _namespace;\n        this.i18nUseExternalIds = i18nUseExternalIds;\n        this._constants = _constants;\n        this._dataIndex = 0;\n        this._bindingContext = 0;\n        this._prefixCode = [];\n        /**\n         * List of callbacks to generate creation mode instructions. We store them here as we process\n         * the template so bindings in listeners are resolved only once all nodes have been visited.\n         * This ensures all local refs and context variables are available for matching.\n         */\n        this._creationCodeFns = [];\n        /**\n         * List of callbacks to generate update mode instructions. We store them here as we process\n         * the template so bindings are resolved only once all nodes have been visited. This ensures\n         * all local refs and context variables are available for matching.\n         */\n        this._updateCodeFns = [];\n        /** Index of the currently-selected node. */\n        this._currentIndex = 0;\n        /** Temporary variable declarations generated from visiting pipes, literals, etc. */\n        this._tempVariables = [];\n        /**\n         * List of callbacks to build nested templates. Nested templates must not be visited until\n         * after the parent template has finished visiting all of its nodes. This ensures that all\n         * local ref bindings in nested templates are able to find local ref values if the refs\n         * are defined after the template declaration.\n         */\n        this._nestedTemplateFns = [];\n        this._unsupported = unsupported;\n        // i18n context local to this template\n        this.i18n = null;\n        // Number of slots to reserve for pureFunctions\n        this._pureFunctionSlots = 0;\n        // Number of binding slots\n        this._bindingSlots = 0;\n        // Projection slots found in the template. Projection slots can distribute projected\n        // nodes based on a selector, or can just use the wildcard selector to match\n        // all nodes which aren't matching any selector.\n        this._ngContentReservedSlots = [];\n        // Number of non-default selectors found in all parent templates of this template. We need to\n        // track it to properly adjust projection slot index in the `projection` instruction.\n        this._ngContentSelectorsOffset = 0;\n        // Expression that should be used as implicit receiver when converting template\n        // expressions to output AST.\n        this._implicitReceiverExpr = null;\n        // These should be handled in the template or element directly.\n        this.visitReference = invalid$1;\n        this.visitVariable = invalid$1;\n        this.visitTextAttribute = invalid$1;\n        this.visitBoundAttribute = invalid$1;\n        this.visitBoundEvent = invalid$1;\n        this._bindingScope = parentBindingScope.nestedScope(level);\n        // Turn the relative context file path into an identifier by replacing non-alphanumeric\n        // characters with underscores.\n        this.fileBasedI18nSuffix = relativeContextFilePath.replace(/[^A-Za-z0-9]/g, '_') + '_';\n        this._valueConverter = new ValueConverter(constantPool, () => this.allocateDataSlot(), (numSlots) => this.allocatePureFunctionSlots(numSlots), (name, localName, slot, value) => {\n            const pipeType = pipeTypeByName.get(name);\n            if (pipeType) {\n                this.pipes.add(pipeType);\n            }\n            this._bindingScope.set(this.level, localName, value);\n            this.creationInstruction(null, Identifiers$1.pipe, [literal(slot), literal(name)]);\n        });\n    }\n    buildTemplateFunction(nodes, variables, ngContentSelectorsOffset = 0, i18n) {\n        this._ngContentSelectorsOffset = ngContentSelectorsOffset;\n        if (this._namespace !== Identifiers$1.namespaceHTML) {\n            this.creationInstruction(null, this._namespace);\n        }\n        // Create variable bindings\n        variables.forEach(v => this.registerContextVariables(v));\n        // Initiate i18n context in case:\n        // - this template has parent i18n context\n        // - or the template has i18n meta associated with it,\n        //   but it's not initiated by the Element (e.g. <ng-template i18n>)\n        const initI18nContext = this.i18nContext ||\n            (isI18nRootNode(i18n) && !isSingleI18nIcu(i18n) &&\n                !(isSingleElementTemplate(nodes) && nodes[0].i18n === i18n));\n        const selfClosingI18nInstruction = hasTextChildrenOnly(nodes);\n        if (initI18nContext) {\n            this.i18nStart(null, i18n, selfClosingI18nInstruction);\n        }\n        // This is the initial pass through the nodes of this template. In this pass, we\n        // queue all creation mode and update mode instructions for generation in the second\n        // pass. It's necessary to separate the passes to ensure local refs are defined before\n        // resolving bindings. We also count bindings in this pass as we walk bound expressions.\n        visitAll(this, nodes);\n        // Add total binding count to pure function count so pure function instructions are\n        // generated with the correct slot offset when update instructions are processed.\n        this._pureFunctionSlots += this._bindingSlots;\n        // Pipes are walked in the first pass (to enqueue `pipe()` creation instructions and\n        // `pipeBind` update instructions), so we have to update the slot offsets manually\n        // to account for bindings.\n        this._valueConverter.updatePipeSlotOffsets(this._bindingSlots);\n        // Nested templates must be processed before creation instructions so template()\n        // instructions can be generated with the correct internal const count.\n        this._nestedTemplateFns.forEach(buildTemplateFn => buildTemplateFn());\n        // Output the `projectionDef` instruction when some `<ng-content>` tags are present.\n        // The `projectionDef` instruction is only emitted for the component template and\n        // is skipped for nested templates (<ng-template> tags).\n        if (this.level === 0 && this._ngContentReservedSlots.length) {\n            const parameters = [];\n            // By default the `projectionDef` instructions creates one slot for the wildcard\n            // selector if no parameters are passed. Therefore we only want to allocate a new\n            // array for the projection slots if the default projection slot is not sufficient.\n            if (this._ngContentReservedSlots.length > 1 || this._ngContentReservedSlots[0] !== '*') {\n                const r3ReservedSlots = this._ngContentReservedSlots.map(s => s !== '*' ? parseSelectorToR3Selector(s) : s);\n                parameters.push(this.constantPool.getConstLiteral(asLiteral(r3ReservedSlots), true));\n            }\n            // Since we accumulate ngContent selectors while processing template elements,\n            // we *prepend* `projectionDef` to creation instructions block, to put it before\n            // any `projection` instructions\n            this.creationInstruction(null, Identifiers$1.projectionDef, parameters, /* prepend */ true);\n        }\n        if (initI18nContext) {\n            this.i18nEnd(null, selfClosingI18nInstruction);\n        }\n        // Generate all the creation mode instructions (e.g. resolve bindings in listeners)\n        const creationStatements = this._creationCodeFns.map((fn) => fn());\n        // Generate all the update mode instructions (e.g. resolve property or text bindings)\n        const updateStatements = this._updateCodeFns.map((fn) => fn());\n        //  Variable declaration must occur after binding resolution so we can generate context\n        //  instructions that build on each other.\n        // e.g. const b = nextContext().$implicit(); const b = nextContext();\n        const creationVariables = this._bindingScope.viewSnapshotStatements();\n        const updateVariables = this._bindingScope.variableDeclarations().concat(this._tempVariables);\n        const creationBlock = creationStatements.length > 0 ?\n            [renderFlagCheckIfStmt(1 /* Create */, creationVariables.concat(creationStatements))] :\n            [];\n        const updateBlock = updateStatements.length > 0 ?\n            [renderFlagCheckIfStmt(2 /* Update */, updateVariables.concat(updateStatements))] :\n            [];\n        return fn(\n        // i.e. (rf: RenderFlags, ctx: any)\n        [new FnParam(RENDER_FLAGS, NUMBER_TYPE), new FnParam(CONTEXT_NAME, null)], [\n            // Temporary variable declarations for query refresh (i.e. let _t: any;)\n            ...this._prefixCode,\n            // Creating mode (i.e. if (rf & RenderFlags.Create) { ... })\n            ...creationBlock,\n            // Binding and refresh mode (i.e. if (rf & RenderFlags.Update) {...})\n            ...updateBlock,\n        ], INFERRED_TYPE, null, this.templateName);\n    }\n    // LocalResolver\n    getLocal(name) {\n        return this._bindingScope.get(name);\n    }\n    // LocalResolver\n    notifyImplicitReceiverUse() {\n        this._bindingScope.notifyImplicitReceiverUse();\n    }\n    i18nTranslate(message, params = {}, ref, transformFn) {\n        const _ref = ref || this.i18nGenerateMainBlockVar();\n        // Closure Compiler requires const names to start with `MSG_` but disallows any other const to\n        // start with `MSG_`. We define a variable starting with `MSG_` just for the `goog.getMsg` call\n        const closureVar = this.i18nGenerateClosureVar(message.id);\n        const statements = getTranslationDeclStmts(message, _ref, closureVar, params, transformFn);\n        this._constants.prepareStatements.push(...statements);\n        return _ref;\n    }\n    registerContextVariables(variable$1) {\n        const scopedName = this._bindingScope.freshReferenceName();\n        const retrievalLevel = this.level;\n        const lhs = variable(variable$1.name + scopedName);\n        this._bindingScope.set(retrievalLevel, variable$1.name, lhs, 1 /* CONTEXT */, (scope, relativeLevel) => {\n            let rhs;\n            if (scope.bindingLevel === retrievalLevel) {\n                // e.g. ctx\n                rhs = variable(CONTEXT_NAME);\n            }\n            else {\n                const sharedCtxVar = scope.getSharedContextName(retrievalLevel);\n                // e.g. ctx_r0   OR  x(2);\n                rhs = sharedCtxVar ? sharedCtxVar : generateNextContextExpr(relativeLevel);\n            }\n            // e.g. const $item$ = x(2).$implicit;\n            return [lhs.set(rhs.prop(variable$1.value || IMPLICIT_REFERENCE)).toConstDecl()];\n        });\n    }\n    i18nAppendBindings(expressions) {\n        if (expressions.length > 0) {\n            expressions.forEach(expression => this.i18n.appendBinding(expression));\n        }\n    }\n    i18nBindProps(props) {\n        const bound = {};\n        Object.keys(props).forEach(key => {\n            const prop = props[key];\n            if (prop instanceof Text) {\n                bound[key] = literal(prop.value);\n            }\n            else {\n                const value = prop.value.visit(this._valueConverter);\n                this.allocateBindingSlots(value);\n                if (value instanceof Interpolation) {\n                    const { strings, expressions } = value;\n                    const { id, bindings } = this.i18n;\n                    const label = assembleI18nBoundString(strings, bindings.size, id);\n                    this.i18nAppendBindings(expressions);\n                    bound[key] = literal(label);\n                }\n            }\n        });\n        return bound;\n    }\n    // Generates top level vars for i18n blocks (i.e. `i18n_N`).\n    i18nGenerateMainBlockVar() {\n        return variable(this.constantPool.uniqueName(TRANSLATION_VAR_PREFIX));\n    }\n    // Generates vars with Closure-specific names for i18n blocks (i.e. `MSG_XXX`).\n    i18nGenerateClosureVar(messageId) {\n        let name;\n        const suffix = this.fileBasedI18nSuffix.toUpperCase();\n        if (this.i18nUseExternalIds) {\n            const prefix = getTranslationConstPrefix(`EXTERNAL_`);\n            const uniqueSuffix = this.constantPool.uniqueName(suffix);\n            name = `${prefix}${sanitizeIdentifier(messageId)}$$${uniqueSuffix}`;\n        }\n        else {\n            const prefix = getTranslationConstPrefix(suffix);\n            name = this.constantPool.uniqueName(prefix);\n        }\n        return variable(name);\n    }\n    i18nUpdateRef(context) {\n        const { icus, meta, isRoot, isResolved, isEmitted } = context;\n        if (isRoot && isResolved && !isEmitted && !isSingleI18nIcu(meta)) {\n            context.isEmitted = true;\n            const placeholders = context.getSerializedPlaceholders();\n            let icuMapping = {};\n            let params = placeholders.size ? placeholdersToParams(placeholders) : {};\n            if (icus.size) {\n                icus.forEach((refs, key) => {\n                    if (refs.length === 1) {\n                        // if we have one ICU defined for a given\n                        // placeholder - just output its reference\n                        params[key] = refs[0];\n                    }\n                    else {\n                        // ... otherwise we need to activate post-processing\n                        // to replace ICU placeholders with proper values\n                        const placeholder = wrapI18nPlaceholder(`${I18N_ICU_MAPPING_PREFIX}${key}`);\n                        params[key] = literal(placeholder);\n                        icuMapping[key] = literalArr(refs);\n                    }\n                });\n            }\n            // translation requires post processing in 2 cases:\n            // - if we have placeholders with multiple values (ex. `START_DIV`: [�#1�, �#2�, ...])\n            // - if we have multiple ICUs that refer to the same placeholder name\n            const needsPostprocessing = Array.from(placeholders.values()).some((value) => value.length > 1) ||\n                Object.keys(icuMapping).length;\n            let transformFn;\n            if (needsPostprocessing) {\n                transformFn = (raw) => {\n                    const args = [raw];\n                    if (Object.keys(icuMapping).length) {\n                        args.push(mapLiteral(icuMapping, true));\n                    }\n                    return instruction(null, Identifiers$1.i18nPostprocess, args);\n                };\n            }\n            this.i18nTranslate(meta, params, context.ref, transformFn);\n        }\n    }\n    i18nStart(span = null, meta, selfClosing) {\n        const index = this.allocateDataSlot();\n        this.i18n = this.i18nContext ?\n            this.i18nContext.forkChildContext(index, this.templateIndex, meta) :\n            new I18nContext(index, this.i18nGenerateMainBlockVar(), 0, this.templateIndex, meta);\n        // generate i18nStart instruction\n        const { id, ref } = this.i18n;\n        const params = [literal(index), this.addToConsts(ref)];\n        if (id > 0) {\n            // do not push 3rd argument (sub-block id)\n            // into i18nStart call for top level i18n context\n            params.push(literal(id));\n        }\n        this.creationInstruction(span, selfClosing ? Identifiers$1.i18n : Identifiers$1.i18nStart, params);\n    }\n    i18nEnd(span = null, selfClosing) {\n        if (!this.i18n) {\n            throw new Error('i18nEnd is executed with no i18n context present');\n        }\n        if (this.i18nContext) {\n            this.i18nContext.reconcileChildContext(this.i18n);\n            this.i18nUpdateRef(this.i18nContext);\n        }\n        else {\n            this.i18nUpdateRef(this.i18n);\n        }\n        // setup accumulated bindings\n        const { index, bindings } = this.i18n;\n        if (bindings.size) {\n            const chainBindings = [];\n            bindings.forEach(binding => {\n                chainBindings.push({ sourceSpan: span, value: () => this.convertPropertyBinding(binding) });\n            });\n            // for i18n block, advance to the most recent element index (by taking the current number of\n            // elements and subtracting one) before invoking `i18nExp` instructions, to make sure the\n            // necessary lifecycle hooks of components/directives are properly flushed.\n            this.updateInstructionChainWithAdvance(this.getConstCount() - 1, Identifiers$1.i18nExp, chainBindings);\n            this.updateInstruction(span, Identifiers$1.i18nApply, [literal(index)]);\n        }\n        if (!selfClosing) {\n            this.creationInstruction(span, Identifiers$1.i18nEnd);\n        }\n        this.i18n = null; // reset local i18n context\n    }\n    i18nAttributesInstruction(nodeIndex, attrs, sourceSpan) {\n        let hasBindings = false;\n        const i18nAttrArgs = [];\n        const bindings = [];\n        attrs.forEach(attr => {\n            const message = attr.i18n;\n            if (attr instanceof TextAttribute) {\n                i18nAttrArgs.push(literal(attr.name), this.i18nTranslate(message));\n            }\n            else {\n                const converted = attr.value.visit(this._valueConverter);\n                this.allocateBindingSlots(converted);\n                if (converted instanceof Interpolation) {\n                    const placeholders = assembleBoundTextPlaceholders(message);\n                    const params = placeholdersToParams(placeholders);\n                    i18nAttrArgs.push(literal(attr.name), this.i18nTranslate(message, params));\n                    converted.expressions.forEach(expression => {\n                        hasBindings = true;\n                        bindings.push({\n                            sourceSpan,\n                            value: () => this.convertPropertyBinding(expression),\n                        });\n                    });\n                }\n            }\n        });\n        if (bindings.length > 0) {\n            this.updateInstructionChainWithAdvance(nodeIndex, Identifiers$1.i18nExp, bindings);\n        }\n        if (i18nAttrArgs.length > 0) {\n            const index = literal(this.allocateDataSlot());\n            const constIndex = this.addToConsts(literalArr(i18nAttrArgs));\n            this.creationInstruction(sourceSpan, Identifiers$1.i18nAttributes, [index, constIndex]);\n            if (hasBindings) {\n                this.updateInstruction(sourceSpan, Identifiers$1.i18nApply, [index]);\n            }\n        }\n    }\n    getNamespaceInstruction(namespaceKey) {\n        switch (namespaceKey) {\n            case 'math':\n                return Identifiers$1.namespaceMathML;\n            case 'svg':\n                return Identifiers$1.namespaceSVG;\n            default:\n                return Identifiers$1.namespaceHTML;\n        }\n    }\n    addNamespaceInstruction(nsInstruction, element) {\n        this._namespace = nsInstruction;\n        this.creationInstruction(element.sourceSpan, nsInstruction);\n    }\n    /**\n     * Adds an update instruction for an interpolated property or attribute, such as\n     * `prop=\"{{value}}\"` or `attr.title=\"{{value}}\"`\n     */\n    interpolatedUpdateInstruction(instruction, elementIndex, attrName, input, value, params) {\n        this.updateInstructionWithAdvance(elementIndex, input.sourceSpan, instruction, () => [literal(attrName), ...this.getUpdateInstructionArguments(value), ...params]);\n    }\n    visitContent(ngContent) {\n        const slot = this.allocateDataSlot();\n        const projectionSlotIdx = this._ngContentSelectorsOffset + this._ngContentReservedSlots.length;\n        const parameters = [literal(slot)];\n        this._ngContentReservedSlots.push(ngContent.selector);\n        const nonContentSelectAttributes = ngContent.attributes.filter(attr => attr.name.toLowerCase() !== NG_CONTENT_SELECT_ATTR$1);\n        const attributes = this.getAttributeExpressions(nonContentSelectAttributes, [], []);\n        if (attributes.length > 0) {\n            parameters.push(literal(projectionSlotIdx), literalArr(attributes));\n        }\n        else if (projectionSlotIdx !== 0) {\n            parameters.push(literal(projectionSlotIdx));\n        }\n        this.creationInstruction(ngContent.sourceSpan, Identifiers$1.projection, parameters);\n        if (this.i18n) {\n            this.i18n.appendProjection(ngContent.i18n, slot);\n        }\n    }\n    visitElement(element) {\n        const elementIndex = this.allocateDataSlot();\n        const stylingBuilder = new StylingBuilder(null);\n        let isNonBindableMode = false;\n        const isI18nRootElement = isI18nRootNode(element.i18n) && !isSingleI18nIcu(element.i18n);\n        const i18nAttrs = [];\n        const outputAttrs = [];\n        const [namespaceKey, elementName] = splitNsName(element.name);\n        const isNgContainer$1 = isNgContainer(element.name);\n        // Handle styling, i18n, ngNonBindable attributes\n        for (const attr of element.attributes) {\n            const { name, value } = attr;\n            if (name === NON_BINDABLE_ATTR) {\n                isNonBindableMode = true;\n            }\n            else if (name === 'style') {\n                stylingBuilder.registerStyleAttr(value);\n            }\n            else if (name === 'class') {\n                stylingBuilder.registerClassAttr(value);\n            }\n            else {\n                (attr.i18n ? i18nAttrs : outputAttrs).push(attr);\n            }\n        }\n        // Match directives on non i18n attributes\n        this.matchDirectives(element.name, element);\n        // Regular element or ng-container creation mode\n        const parameters = [literal(elementIndex)];\n        if (!isNgContainer$1) {\n            parameters.push(literal(elementName));\n        }\n        // Add the attributes\n        const allOtherInputs = [];\n        element.inputs.forEach((input) => {\n            const stylingInputWasSet = stylingBuilder.registerBoundInput(input);\n            if (!stylingInputWasSet) {\n                if (input.type === 0 /* Property */ && input.i18n) {\n                    i18nAttrs.push(input);\n                }\n                else {\n                    allOtherInputs.push(input);\n                }\n            }\n        });\n        // add attributes for directive and projection matching purposes\n        const attributes = this.getAttributeExpressions(outputAttrs, allOtherInputs, element.outputs, stylingBuilder, [], i18nAttrs);\n        parameters.push(this.addAttrsToConsts(attributes));\n        // local refs (ex.: <div #foo #bar=\"baz\">)\n        const refs = this.prepareRefsArray(element.references);\n        parameters.push(this.addToConsts(refs));\n        const wasInNamespace = this._namespace;\n        const currentNamespace = this.getNamespaceInstruction(namespaceKey);\n        // If the namespace is changing now, include an instruction to change it\n        // during element creation.\n        if (currentNamespace !== wasInNamespace) {\n            this.addNamespaceInstruction(currentNamespace, element);\n        }\n        if (this.i18n) {\n            this.i18n.appendElement(element.i18n, elementIndex);\n        }\n        // Note that we do not append text node instructions and ICUs inside i18n section,\n        // so we exclude them while calculating whether current element has children\n        const hasChildren = (!isI18nRootElement && this.i18n) ? !hasTextChildrenOnly(element.children) :\n            element.children.length > 0;\n        const createSelfClosingInstruction = !stylingBuilder.hasBindingsWithPipes &&\n            element.outputs.length === 0 && i18nAttrs.length === 0 && !hasChildren;\n        const createSelfClosingI18nInstruction = !createSelfClosingInstruction && hasTextChildrenOnly(element.children);\n        if (createSelfClosingInstruction) {\n            this.creationInstruction(element.sourceSpan, isNgContainer$1 ? Identifiers$1.elementContainer : Identifiers$1.element, trimTrailingNulls(parameters));\n        }\n        else {\n            this.creationInstruction(element.sourceSpan, isNgContainer$1 ? Identifiers$1.elementContainerStart : Identifiers$1.elementStart, trimTrailingNulls(parameters));\n            if (isNonBindableMode) {\n                this.creationInstruction(element.sourceSpan, Identifiers$1.disableBindings);\n            }\n            if (i18nAttrs.length > 0) {\n                this.i18nAttributesInstruction(elementIndex, i18nAttrs, element.sourceSpan);\n            }\n            // Generate Listeners (outputs)\n            if (element.outputs.length > 0) {\n                const listeners = element.outputs.map((outputAst) => ({\n                    sourceSpan: outputAst.sourceSpan,\n                    params: this.prepareListenerParameter(element.name, outputAst, elementIndex)\n                }));\n                this.creationInstructionChain(Identifiers$1.listener, listeners);\n            }\n            // Note: it's important to keep i18n/i18nStart instructions after i18nAttributes and\n            // listeners, to make sure i18nAttributes instruction targets current element at runtime.\n            if (isI18nRootElement) {\n                this.i18nStart(element.sourceSpan, element.i18n, createSelfClosingI18nInstruction);\n            }\n        }\n        // the code here will collect all update-level styling instructions and add them to the\n        // update block of the template function AOT code. Instructions like `styleProp`,\n        // `styleMap`, `classMap`, `classProp`\n        // are all generated and assigned in the code below.\n        const stylingInstructions = stylingBuilder.buildUpdateLevelInstructions(this._valueConverter);\n        const limit = stylingInstructions.length - 1;\n        for (let i = 0; i <= limit; i++) {\n            const instruction = stylingInstructions[i];\n            this._bindingSlots += this.processStylingUpdateInstruction(elementIndex, instruction);\n        }\n        // the reason why `undefined` is used is because the renderer understands this as a\n        // special value to symbolize that there is no RHS to this binding\n        // TODO (matsko): revisit this once FW-959 is approached\n        const emptyValueBindInstruction = literal(undefined);\n        const propertyBindings = [];\n        const attributeBindings = [];\n        // Generate element input bindings\n        allOtherInputs.forEach((input) => {\n            const inputType = input.type;\n            if (inputType === 4 /* Animation */) {\n                const value = input.value.visit(this._valueConverter);\n                // animation bindings can be presented in the following formats:\n                // 1. [@binding]=\"fooExp\"\n                // 2. [@binding]=\"{value:fooExp, params:{...}}\"\n                // 3. [@binding]\n                // 4. @binding\n                // All formats will be valid for when a synthetic binding is created.\n                // The reasoning for this is because the renderer should get each\n                // synthetic binding value in the order of the array that they are\n                // defined in...\n                const hasValue = value instanceof LiteralPrimitive ? !!value.value : true;\n                this.allocateBindingSlots(value);\n                propertyBindings.push({\n                    name: prepareSyntheticPropertyName(input.name),\n                    sourceSpan: input.sourceSpan,\n                    value: () => hasValue ? this.convertPropertyBinding(value) : emptyValueBindInstruction\n                });\n            }\n            else {\n                // we must skip attributes with associated i18n context, since these attributes are handled\n                // separately and corresponding `i18nExp` and `i18nApply` instructions will be generated\n                if (input.i18n)\n                    return;\n                const value = input.value.visit(this._valueConverter);\n                if (value !== undefined) {\n                    const params = [];\n                    const [attrNamespace, attrName] = splitNsName(input.name);\n                    const isAttributeBinding = inputType === 1 /* Attribute */;\n                    const sanitizationRef = resolveSanitizationFn(input.securityContext, isAttributeBinding);\n                    if (sanitizationRef)\n                        params.push(sanitizationRef);\n                    if (attrNamespace) {\n                        const namespaceLiteral = literal(attrNamespace);\n                        if (sanitizationRef) {\n                            params.push(namespaceLiteral);\n                        }\n                        else {\n                            // If there wasn't a sanitization ref, we need to add\n                            // an extra param so that we can pass in the namespace.\n                            params.push(literal(null), namespaceLiteral);\n                        }\n                    }\n                    this.allocateBindingSlots(value);\n                    if (inputType === 0 /* Property */) {\n                        if (value instanceof Interpolation) {\n                            // prop=\"{{value}}\" and friends\n                            this.interpolatedUpdateInstruction(getPropertyInterpolationExpression(value), elementIndex, attrName, input, value, params);\n                        }\n                        else {\n                            // [prop]=\"value\"\n                            // Collect all the properties so that we can chain into a single function at the end.\n                            propertyBindings.push({\n                                name: attrName,\n                                sourceSpan: input.sourceSpan,\n                                value: () => this.convertPropertyBinding(value),\n                                params\n                            });\n                        }\n                    }\n                    else if (inputType === 1 /* Attribute */) {\n                        if (value instanceof Interpolation && getInterpolationArgsLength(value) > 1) {\n                            // attr.name=\"text{{value}}\" and friends\n                            this.interpolatedUpdateInstruction(getAttributeInterpolationExpression(value), elementIndex, attrName, input, value, params);\n                        }\n                        else {\n                            const boundValue = value instanceof Interpolation ? value.expressions[0] : value;\n                            // [attr.name]=\"value\" or attr.name=\"{{value}}\"\n                            // Collect the attribute bindings so that they can be chained at the end.\n                            attributeBindings.push({\n                                name: attrName,\n                                sourceSpan: input.sourceSpan,\n                                value: () => this.convertPropertyBinding(boundValue),\n                                params\n                            });\n                        }\n                    }\n                    else {\n                        // class prop\n                        this.updateInstructionWithAdvance(elementIndex, input.sourceSpan, Identifiers$1.classProp, () => {\n                            return [\n                                literal(elementIndex), literal(attrName), this.convertPropertyBinding(value),\n                                ...params\n                            ];\n                        });\n                    }\n                }\n            }\n        });\n        if (propertyBindings.length > 0) {\n            this.updateInstructionChainWithAdvance(elementIndex, Identifiers$1.property, propertyBindings);\n        }\n        if (attributeBindings.length > 0) {\n            this.updateInstructionChainWithAdvance(elementIndex, Identifiers$1.attribute, attributeBindings);\n        }\n        // Traverse element child nodes\n        visitAll(this, element.children);\n        if (!isI18nRootElement && this.i18n) {\n            this.i18n.appendElement(element.i18n, elementIndex, true);\n        }\n        if (!createSelfClosingInstruction) {\n            // Finish element construction mode.\n            const span = element.endSourceSpan || element.sourceSpan;\n            if (isI18nRootElement) {\n                this.i18nEnd(span, createSelfClosingI18nInstruction);\n            }\n            if (isNonBindableMode) {\n                this.creationInstruction(span, Identifiers$1.enableBindings);\n            }\n            this.creationInstruction(span, isNgContainer$1 ? Identifiers$1.elementContainerEnd : Identifiers$1.elementEnd);\n        }\n    }\n    visitTemplate(template) {\n        const NG_TEMPLATE_TAG_NAME = 'ng-template';\n        const templateIndex = this.allocateDataSlot();\n        if (this.i18n) {\n            this.i18n.appendTemplate(template.i18n, templateIndex);\n        }\n        const tagName = sanitizeIdentifier(template.tagName || '');\n        const contextName = `${this.contextName}${tagName ? '_' + tagName : ''}_${templateIndex}`;\n        const templateName = `${contextName}_Template`;\n        const parameters = [\n            literal(templateIndex),\n            variable(templateName),\n            // We don't care about the tag's namespace here, because we infer\n            // it based on the parent nodes inside the template instruction.\n            literal(template.tagName ? splitNsName(template.tagName)[1] : template.tagName),\n        ];\n        // find directives matching on a given <ng-template> node\n        this.matchDirectives(NG_TEMPLATE_TAG_NAME, template);\n        // prepare attributes parameter (including attributes used for directive matching)\n        const [i18nStaticAttrs, staticAttrs] = partitionArray(template.attributes, hasI18nMeta);\n        const attrsExprs = this.getAttributeExpressions(staticAttrs, template.inputs, template.outputs, undefined /* styles */, template.templateAttrs, i18nStaticAttrs);\n        parameters.push(this.addAttrsToConsts(attrsExprs));\n        // local refs (ex.: <ng-template #foo>)\n        if (template.references && template.references.length) {\n            const refs = this.prepareRefsArray(template.references);\n            parameters.push(this.addToConsts(refs));\n            parameters.push(importExpr(Identifiers$1.templateRefExtractor));\n        }\n        // Create the template function\n        const templateVisitor = new TemplateDefinitionBuilder(this.constantPool, this._bindingScope, this.level + 1, contextName, this.i18n, templateIndex, templateName, this.directiveMatcher, this.directives, this.pipeTypeByName, this.pipes, this._namespace, this.fileBasedI18nSuffix, this.i18nUseExternalIds, this._constants);\n        // Nested templates must not be visited until after their parent templates have completed\n        // processing, so they are queued here until after the initial pass. Otherwise, we wouldn't\n        // be able to support bindings in nested templates to local refs that occur after the\n        // template definition. e.g. <div *ngIf=\"showing\">{{ foo }}</div>  <div #foo></div>\n        this._nestedTemplateFns.push(() => {\n            const templateFunctionExpr = templateVisitor.buildTemplateFunction(template.children, template.variables, this._ngContentReservedSlots.length + this._ngContentSelectorsOffset, template.i18n);\n            this.constantPool.statements.push(templateFunctionExpr.toDeclStmt(templateName));\n            if (templateVisitor._ngContentReservedSlots.length) {\n                this._ngContentReservedSlots.push(...templateVisitor._ngContentReservedSlots);\n            }\n        });\n        // e.g. template(1, MyComp_Template_1)\n        this.creationInstruction(template.sourceSpan, Identifiers$1.templateCreate, () => {\n            parameters.splice(2, 0, literal(templateVisitor.getConstCount()), literal(templateVisitor.getVarCount()));\n            return trimTrailingNulls(parameters);\n        });\n        // handle property bindings e.g. ɵɵproperty('ngForOf', ctx.items), et al;\n        this.templatePropertyBindings(templateIndex, template.templateAttrs);\n        // Only add normal input/output binding instructions on explicit <ng-template> elements.\n        if (template.tagName === NG_TEMPLATE_TAG_NAME) {\n            const [i18nInputs, inputs] = partitionArray(template.inputs, hasI18nMeta);\n            const i18nAttrs = [...i18nStaticAttrs, ...i18nInputs];\n            // Add i18n attributes that may act as inputs to directives. If such attributes are present,\n            // generate `i18nAttributes` instruction. Note: we generate it only for explicit <ng-template>\n            // elements, in case of inline templates, corresponding instructions will be generated in the\n            // nested template function.\n            if (i18nAttrs.length > 0) {\n                this.i18nAttributesInstruction(templateIndex, i18nAttrs, template.sourceSpan);\n            }\n            // Add the input bindings\n            if (inputs.length > 0) {\n                this.templatePropertyBindings(templateIndex, inputs);\n            }\n            // Generate listeners for directive output\n            if (template.outputs.length > 0) {\n                const listeners = template.outputs.map((outputAst) => ({\n                    sourceSpan: outputAst.sourceSpan,\n                    params: this.prepareListenerParameter('ng_template', outputAst, templateIndex)\n                }));\n                this.creationInstructionChain(Identifiers$1.listener, listeners);\n            }\n        }\n    }\n    visitBoundText(text) {\n        if (this.i18n) {\n            const value = text.value.visit(this._valueConverter);\n            this.allocateBindingSlots(value);\n            if (value instanceof Interpolation) {\n                this.i18n.appendBoundText(text.i18n);\n                this.i18nAppendBindings(value.expressions);\n            }\n            return;\n        }\n        const nodeIndex = this.allocateDataSlot();\n        this.creationInstruction(text.sourceSpan, Identifiers$1.text, [literal(nodeIndex)]);\n        const value = text.value.visit(this._valueConverter);\n        this.allocateBindingSlots(value);\n        if (value instanceof Interpolation) {\n            this.updateInstructionWithAdvance(nodeIndex, text.sourceSpan, getTextInterpolationExpression(value), () => this.getUpdateInstructionArguments(value));\n        }\n        else {\n            error('Text nodes should be interpolated and never bound directly.');\n        }\n    }\n    visitText(text) {\n        // when a text element is located within a translatable\n        // block, we exclude this text element from instructions set,\n        // since it will be captured in i18n content and processed at runtime\n        if (!this.i18n) {\n            this.creationInstruction(text.sourceSpan, Identifiers$1.text, [literal(this.allocateDataSlot()), literal(text.value)]);\n        }\n    }\n    visitIcu(icu) {\n        let initWasInvoked = false;\n        // if an ICU was created outside of i18n block, we still treat\n        // it as a translatable entity and invoke i18nStart and i18nEnd\n        // to generate i18n context and the necessary instructions\n        if (!this.i18n) {\n            initWasInvoked = true;\n            this.i18nStart(null, icu.i18n, true);\n        }\n        const i18n = this.i18n;\n        const vars = this.i18nBindProps(icu.vars);\n        const placeholders = this.i18nBindProps(icu.placeholders);\n        // output ICU directly and keep ICU reference in context\n        const message = icu.i18n;\n        // we always need post-processing function for ICUs, to make sure that:\n        // - all placeholders in a form of {PLACEHOLDER} are replaced with actual values (note:\n        // `goog.getMsg` does not process ICUs and uses the `{PLACEHOLDER}` format for placeholders\n        // inside ICUs)\n        // - all ICU vars (such as `VAR_SELECT` or `VAR_PLURAL`) are replaced with correct values\n        const transformFn = (raw) => {\n            const params = Object.assign(Object.assign({}, vars), placeholders);\n            const formatted = i18nFormatPlaceholderNames(params, /* useCamelCase */ false);\n            return instruction(null, Identifiers$1.i18nPostprocess, [raw, mapLiteral(formatted, true)]);\n        };\n        // in case the whole i18n message is a single ICU - we do not need to\n        // create a separate top-level translation, we can use the root ref instead\n        // and make this ICU a top-level translation\n        // note: ICU placeholders are replaced with actual values in `i18nPostprocess` function\n        // separately, so we do not pass placeholders into `i18nTranslate` function.\n        if (isSingleI18nIcu(i18n.meta)) {\n            this.i18nTranslate(message, /* placeholders */ {}, i18n.ref, transformFn);\n        }\n        else {\n            // output ICU directly and keep ICU reference in context\n            const ref = this.i18nTranslate(message, /* placeholders */ {}, /* ref */ undefined, transformFn);\n            i18n.appendIcu(icuFromI18nMessage(message).name, ref);\n        }\n        if (initWasInvoked) {\n            this.i18nEnd(null, true);\n        }\n        return null;\n    }\n    allocateDataSlot() {\n        return this._dataIndex++;\n    }\n    getConstCount() {\n        return this._dataIndex;\n    }\n    getVarCount() {\n        return this._pureFunctionSlots;\n    }\n    getConsts() {\n        return this._constants;\n    }\n    getNgContentSelectors() {\n        return this._ngContentReservedSlots.length ?\n            this.constantPool.getConstLiteral(asLiteral(this._ngContentReservedSlots), true) :\n            null;\n    }\n    bindingContext() {\n        return `${this._bindingContext++}`;\n    }\n    templatePropertyBindings(templateIndex, attrs) {\n        const propertyBindings = [];\n        attrs.forEach(input => {\n            if (input instanceof BoundAttribute) {\n                const value = input.value.visit(this._valueConverter);\n                if (value !== undefined) {\n                    this.allocateBindingSlots(value);\n                    if (value instanceof Interpolation) {\n                        // Params typically contain attribute namespace and value sanitizer, which is applicable\n                        // for regular HTML elements, but not applicable for <ng-template> (since props act as\n                        // inputs to directives), so keep params array empty.\n                        const params = [];\n                        // prop=\"{{value}}\" case\n                        this.interpolatedUpdateInstruction(getPropertyInterpolationExpression(value), templateIndex, input.name, input, value, params);\n                    }\n                    else {\n                        // [prop]=\"value\" case\n                        propertyBindings.push({\n                            name: input.name,\n                            sourceSpan: input.sourceSpan,\n                            value: () => this.convertPropertyBinding(value)\n                        });\n                    }\n                }\n            }\n        });\n        if (propertyBindings.length > 0) {\n            this.updateInstructionChainWithAdvance(templateIndex, Identifiers$1.property, propertyBindings);\n        }\n    }\n    // Bindings must only be resolved after all local refs have been visited, so all\n    // instructions are queued in callbacks that execute once the initial pass has completed.\n    // Otherwise, we wouldn't be able to support local refs that are defined after their\n    // bindings. e.g. {{ foo }} <div #foo></div>\n    instructionFn(fns, span, reference, paramsOrFn, prepend = false) {\n        fns[prepend ? 'unshift' : 'push'](() => {\n            const params = Array.isArray(paramsOrFn) ? paramsOrFn : paramsOrFn();\n            return instruction(span, reference, params).toStmt();\n        });\n    }\n    processStylingUpdateInstruction(elementIndex, instruction) {\n        let allocateBindingSlots = 0;\n        if (instruction) {\n            const calls = [];\n            instruction.calls.forEach(call => {\n                allocateBindingSlots += call.allocateBindingSlots;\n                calls.push({\n                    sourceSpan: call.sourceSpan,\n                    value: () => {\n                        return call.params(value => (call.supportsInterpolation && value instanceof Interpolation) ?\n                            this.getUpdateInstructionArguments(value) :\n                            this.convertPropertyBinding(value));\n                    }\n                });\n            });\n            this.updateInstructionChainWithAdvance(elementIndex, instruction.reference, calls);\n        }\n        return allocateBindingSlots;\n    }\n    creationInstruction(span, reference, paramsOrFn, prepend) {\n        this.instructionFn(this._creationCodeFns, span, reference, paramsOrFn || [], prepend);\n    }\n    creationInstructionChain(reference, calls) {\n        const span = calls.length ? calls[0].sourceSpan : null;\n        this._creationCodeFns.push(() => {\n            return chainedInstruction(reference, calls.map(call => call.params()), span).toStmt();\n        });\n    }\n    updateInstructionWithAdvance(nodeIndex, span, reference, paramsOrFn) {\n        this.addAdvanceInstructionIfNecessary(nodeIndex, span);\n        this.updateInstruction(span, reference, paramsOrFn);\n    }\n    updateInstruction(span, reference, paramsOrFn) {\n        this.instructionFn(this._updateCodeFns, span, reference, paramsOrFn || []);\n    }\n    updateInstructionChain(reference, bindings) {\n        const span = bindings.length ? bindings[0].sourceSpan : null;\n        this._updateCodeFns.push(() => {\n            const calls = bindings.map(property => {\n                const value = property.value();\n                const fnParams = Array.isArray(value) ? value : [value];\n                if (property.params) {\n                    fnParams.push(...property.params);\n                }\n                if (property.name) {\n                    // We want the property name to always be the first function parameter.\n                    fnParams.unshift(literal(property.name));\n                }\n                return fnParams;\n            });\n            return chainedInstruction(reference, calls, span).toStmt();\n        });\n    }\n    updateInstructionChainWithAdvance(nodeIndex, reference, bindings) {\n        this.addAdvanceInstructionIfNecessary(nodeIndex, bindings.length ? bindings[0].sourceSpan : null);\n        this.updateInstructionChain(reference, bindings);\n    }\n    addAdvanceInstructionIfNecessary(nodeIndex, span) {\n        if (nodeIndex !== this._currentIndex) {\n            const delta = nodeIndex - this._currentIndex;\n            if (delta < 1) {\n                throw new Error('advance instruction can only go forwards');\n            }\n            this.instructionFn(this._updateCodeFns, span, Identifiers$1.advance, [literal(delta)]);\n            this._currentIndex = nodeIndex;\n        }\n    }\n    allocatePureFunctionSlots(numSlots) {\n        const originalSlots = this._pureFunctionSlots;\n        this._pureFunctionSlots += numSlots;\n        return originalSlots;\n    }\n    allocateBindingSlots(value) {\n        this._bindingSlots += value instanceof Interpolation ? value.expressions.length : 1;\n    }\n    /**\n     * Gets an expression that refers to the implicit receiver. The implicit\n     * receiver is always the root level context.\n     */\n    getImplicitReceiverExpr() {\n        if (this._implicitReceiverExpr) {\n            return this._implicitReceiverExpr;\n        }\n        return this._implicitReceiverExpr = this.level === 0 ?\n            variable(CONTEXT_NAME) :\n            this._bindingScope.getOrCreateSharedContextVar(0);\n    }\n    convertPropertyBinding(value) {\n        const convertedPropertyBinding = convertPropertyBinding(this, this.getImplicitReceiverExpr(), value, this.bindingContext(), BindingForm.Expression, () => error('Unexpected interpolation'));\n        const valExpr = convertedPropertyBinding.currValExpr;\n        this._tempVariables.push(...convertedPropertyBinding.stmts);\n        return valExpr;\n    }\n    /**\n     * Gets a list of argument expressions to pass to an update instruction expression. Also updates\n     * the temp variables state with temp variables that were identified as needing to be created\n     * while visiting the arguments.\n     * @param value The original expression we will be resolving an arguments list from.\n     */\n    getUpdateInstructionArguments(value) {\n        const { args, stmts } = convertUpdateArguments(this, this.getImplicitReceiverExpr(), value, this.bindingContext());\n        this._tempVariables.push(...stmts);\n        return args;\n    }\n    matchDirectives(elementName, elOrTpl) {\n        if (this.directiveMatcher) {\n            const selector = createCssSelector(elementName, getAttrsForDirectiveMatching(elOrTpl));\n            this.directiveMatcher.match(selector, (cssSelector, staticType) => {\n                this.directives.add(staticType);\n            });\n        }\n    }\n    /**\n     * Prepares all attribute expression values for the `TAttributes` array.\n     *\n     * The purpose of this function is to properly construct an attributes array that\n     * is passed into the `elementStart` (or just `element`) functions. Because there\n     * are many different types of attributes, the array needs to be constructed in a\n     * special way so that `elementStart` can properly evaluate them.\n     *\n     * The format looks like this:\n     *\n     * ```\n     * attrs = [prop, value, prop2, value2,\n     *   PROJECT_AS, selector,\n     *   CLASSES, class1, class2,\n     *   STYLES, style1, value1, style2, value2,\n     *   BINDINGS, name1, name2, name3,\n     *   TEMPLATE, name4, name5, name6,\n     *   I18N, name7, name8, ...]\n     * ```\n     *\n     * Note that this function will fully ignore all synthetic (@foo) attribute values\n     * because those values are intended to always be generated as property instructions.\n     */\n    getAttributeExpressions(renderAttributes, inputs, outputs, styles, templateAttrs = [], i18nAttrs = []) {\n        const alreadySeen = new Set();\n        const attrExprs = [];\n        let ngProjectAsAttr;\n        renderAttributes.forEach((attr) => {\n            if (attr.name === NG_PROJECT_AS_ATTR_NAME) {\n                ngProjectAsAttr = attr;\n            }\n            attrExprs.push(...getAttributeNameLiterals(attr.name), asLiteral(attr.value));\n        });\n        // Keep ngProjectAs next to the other name, value pairs so we can verify that we match\n        // ngProjectAs marker in the attribute name slot.\n        if (ngProjectAsAttr) {\n            attrExprs.push(...getNgProjectAsLiteral(ngProjectAsAttr));\n        }\n        function addAttrExpr(key, value) {\n            if (typeof key === 'string') {\n                if (!alreadySeen.has(key)) {\n                    attrExprs.push(...getAttributeNameLiterals(key));\n                    value !== undefined && attrExprs.push(value);\n                    alreadySeen.add(key);\n                }\n            }\n            else {\n                attrExprs.push(literal(key));\n            }\n        }\n        // it's important that this occurs before BINDINGS and TEMPLATE because once `elementStart`\n        // comes across the BINDINGS or TEMPLATE markers then it will continue reading each value as\n        // as single property value cell by cell.\n        if (styles) {\n            styles.populateInitialStylingAttrs(attrExprs);\n        }\n        if (inputs.length || outputs.length) {\n            const attrsLengthBeforeInputs = attrExprs.length;\n            for (let i = 0; i < inputs.length; i++) {\n                const input = inputs[i];\n                // We don't want the animation and attribute bindings in the\n                // attributes array since they aren't used for directive matching.\n                if (input.type !== 4 /* Animation */ && input.type !== 1 /* Attribute */) {\n                    addAttrExpr(input.name);\n                }\n            }\n            for (let i = 0; i < outputs.length; i++) {\n                const output = outputs[i];\n                if (output.type !== 1 /* Animation */) {\n                    addAttrExpr(output.name);\n                }\n            }\n            // this is a cheap way of adding the marker only after all the input/output\n            // values have been filtered (by not including the animation ones) and added\n            // to the expressions. The marker is important because it tells the runtime\n            // code that this is where attributes without values start...\n            if (attrExprs.length !== attrsLengthBeforeInputs) {\n                attrExprs.splice(attrsLengthBeforeInputs, 0, literal(3 /* Bindings */));\n            }\n        }\n        if (templateAttrs.length) {\n            attrExprs.push(literal(4 /* Template */));\n            templateAttrs.forEach(attr => addAttrExpr(attr.name));\n        }\n        if (i18nAttrs.length) {\n            attrExprs.push(literal(6 /* I18n */));\n            i18nAttrs.forEach(attr => addAttrExpr(attr.name));\n        }\n        return attrExprs;\n    }\n    addToConsts(expression) {\n        if (isNull(expression)) {\n            return TYPED_NULL_EXPR;\n        }\n        const consts = this._constants.constExpressions;\n        // Try to reuse a literal that's already in the array, if possible.\n        for (let i = 0; i < consts.length; i++) {\n            if (consts[i].isEquivalent(expression)) {\n                return literal(i);\n            }\n        }\n        return literal(consts.push(expression) - 1);\n    }\n    addAttrsToConsts(attrs) {\n        return attrs.length > 0 ? this.addToConsts(literalArr(attrs)) : TYPED_NULL_EXPR;\n    }\n    prepareRefsArray(references) {\n        if (!references || references.length === 0) {\n            return TYPED_NULL_EXPR;\n        }\n        const refsParam = flatten(references.map(reference => {\n            const slot = this.allocateDataSlot();\n            // Generate the update temporary.\n            const variableName = this._bindingScope.freshReferenceName();\n            const retrievalLevel = this.level;\n            const lhs = variable(variableName);\n            this._bindingScope.set(retrievalLevel, reference.name, lhs, 0 /* DEFAULT */, (scope, relativeLevel) => {\n                // e.g. nextContext(2);\n                const nextContextStmt = relativeLevel > 0 ? [generateNextContextExpr(relativeLevel).toStmt()] : [];\n                // e.g. const $foo$ = reference(1);\n                const refExpr = lhs.set(importExpr(Identifiers$1.reference).callFn([literal(slot)]));\n                return nextContextStmt.concat(refExpr.toConstDecl());\n            }, true);\n            return [reference.name, reference.value];\n        }));\n        return asLiteral(refsParam);\n    }\n    prepareListenerParameter(tagName, outputAst, index) {\n        return () => {\n            const eventName = outputAst.name;\n            const bindingFnName = outputAst.type === 1 /* Animation */ ?\n                // synthetic @listener.foo values are treated the exact same as are standard listeners\n                prepareSyntheticListenerFunctionName(eventName, outputAst.phase) :\n                sanitizeIdentifier(eventName);\n            const handlerName = `${this.templateName}_${tagName}_${bindingFnName}_${index}_listener`;\n            const scope = this._bindingScope.nestedScope(this._bindingScope.bindingLevel);\n            return prepareEventListenerParameters(outputAst, handlerName, scope);\n        };\n    }\n}\nclass ValueConverter extends AstMemoryEfficientTransformer {\n    constructor(constantPool, allocateSlot, allocatePureFunctionSlots, definePipe) {\n        super();\n        this.constantPool = constantPool;\n        this.allocateSlot = allocateSlot;\n        this.allocatePureFunctionSlots = allocatePureFunctionSlots;\n        this.definePipe = definePipe;\n        this._pipeBindExprs = [];\n    }\n    // AstMemoryEfficientTransformer\n    visitPipe(pipe, context) {\n        // Allocate a slot to create the pipe\n        const slot = this.allocateSlot();\n        const slotPseudoLocal = `PIPE:${slot}`;\n        // Allocate one slot for the result plus one slot per pipe argument\n        const pureFunctionSlot = this.allocatePureFunctionSlots(2 + pipe.args.length);\n        const target = new PropertyRead(pipe.span, pipe.sourceSpan, pipe.nameSpan, new ImplicitReceiver(pipe.span, pipe.sourceSpan), slotPseudoLocal);\n        const { identifier, isVarLength } = pipeBindingCallInfo(pipe.args);\n        this.definePipe(pipe.name, slotPseudoLocal, slot, importExpr(identifier));\n        const args = [pipe.exp, ...pipe.args];\n        const convertedArgs = isVarLength ?\n            this.visitAll([new LiteralArray(pipe.span, pipe.sourceSpan, args)]) :\n            this.visitAll(args);\n        const pipeBindExpr = new FunctionCall(pipe.span, pipe.sourceSpan, target, [\n            new LiteralPrimitive(pipe.span, pipe.sourceSpan, slot),\n            new LiteralPrimitive(pipe.span, pipe.sourceSpan, pureFunctionSlot),\n            ...convertedArgs,\n        ]);\n        this._pipeBindExprs.push(pipeBindExpr);\n        return pipeBindExpr;\n    }\n    updatePipeSlotOffsets(bindingSlots) {\n        this._pipeBindExprs.forEach((pipe) => {\n            // update the slot offset arg (index 1) to account for binding slots\n            const slotOffset = pipe.args[1];\n            slotOffset.value += bindingSlots;\n        });\n    }\n    visitLiteralArray(array, context) {\n        return new BuiltinFunctionCall(array.span, array.sourceSpan, this.visitAll(array.expressions), values => {\n            // If the literal has calculated (non-literal) elements transform it into\n            // calls to literal factories that compose the literal and will cache intermediate\n            // values.\n            const literal = literalArr(values);\n            return getLiteralFactory(this.constantPool, literal, this.allocatePureFunctionSlots);\n        });\n    }\n    visitLiteralMap(map, context) {\n        return new BuiltinFunctionCall(map.span, map.sourceSpan, this.visitAll(map.values), values => {\n            // If the literal has calculated (non-literal) elements  transform it into\n            // calls to literal factories that compose the literal and will cache intermediate\n            // values.\n            const literal = literalMap(values.map((value, index) => ({ key: map.keys[index].key, value, quoted: map.keys[index].quoted })));\n            return getLiteralFactory(this.constantPool, literal, this.allocatePureFunctionSlots);\n        });\n    }\n}\n// Pipes always have at least one parameter, the value they operate on\nconst pipeBindingIdentifiers = [Identifiers$1.pipeBind1, Identifiers$1.pipeBind2, Identifiers$1.pipeBind3, Identifiers$1.pipeBind4];\nfunction pipeBindingCallInfo(args) {\n    const identifier = pipeBindingIdentifiers[args.length];\n    return {\n        identifier: identifier || Identifiers$1.pipeBindV,\n        isVarLength: !identifier,\n    };\n}\nconst pureFunctionIdentifiers = [\n    Identifiers$1.pureFunction0, Identifiers$1.pureFunction1, Identifiers$1.pureFunction2, Identifiers$1.pureFunction3, Identifiers$1.pureFunction4,\n    Identifiers$1.pureFunction5, Identifiers$1.pureFunction6, Identifiers$1.pureFunction7, Identifiers$1.pureFunction8\n];\nfunction pureFunctionCallInfo(args) {\n    const identifier = pureFunctionIdentifiers[args.length];\n    return {\n        identifier: identifier || Identifiers$1.pureFunctionV,\n        isVarLength: !identifier,\n    };\n}\nfunction instruction(span, reference, params) {\n    return importExpr(reference, null, span).callFn(params, span);\n}\n// e.g. x(2);\nfunction generateNextContextExpr(relativeLevelDiff) {\n    return importExpr(Identifiers$1.nextContext)\n        .callFn(relativeLevelDiff > 1 ? [literal(relativeLevelDiff)] : []);\n}\nfunction getLiteralFactory(constantPool, literal$1, allocateSlots) {\n    const { literalFactory, literalFactoryArguments } = constantPool.getLiteralFactory(literal$1);\n    // Allocate 1 slot for the result plus 1 per argument\n    const startSlot = allocateSlots(1 + literalFactoryArguments.length);\n    const { identifier, isVarLength } = pureFunctionCallInfo(literalFactoryArguments);\n    // Literal factories are pure functions that only need to be re-invoked when the parameters\n    // change.\n    const args = [literal(startSlot), literalFactory];\n    if (isVarLength) {\n        args.push(literalArr(literalFactoryArguments));\n    }\n    else {\n        args.push(...literalFactoryArguments);\n    }\n    return importExpr(identifier).callFn(args);\n}\n/**\n * Gets an array of literals that can be added to an expression\n * to represent the name and namespace of an attribute. E.g.\n * `:xlink:href` turns into `[AttributeMarker.NamespaceURI, 'xlink', 'href']`.\n *\n * @param name Name of the attribute, including the namespace.\n */\nfunction getAttributeNameLiterals(name) {\n    const [attributeNamespace, attributeName] = splitNsName(name);\n    const nameLiteral = literal(attributeName);\n    if (attributeNamespace) {\n        return [\n            literal(0 /* NamespaceURI */), literal(attributeNamespace), nameLiteral\n        ];\n    }\n    return [nameLiteral];\n}\n/** The prefix used to get a shared context in BindingScope's map. */\nconst SHARED_CONTEXT_KEY = '$$shared_ctx$$';\nclass BindingScope {\n    constructor(bindingLevel = 0, parent = null) {\n        this.bindingLevel = bindingLevel;\n        this.parent = parent;\n        /** Keeps a map from local variables to their BindingData. */\n        this.map = new Map();\n        this.referenceNameIndex = 0;\n        this.restoreViewVariable = null;\n    }\n    static createRootScope() {\n        return new BindingScope().set(0, '$event', variable('$event'));\n    }\n    get(name) {\n        let current = this;\n        while (current) {\n            let value = current.map.get(name);\n            if (value != null) {\n                if (current !== this) {\n                    // make a local copy and reset the `declare` state\n                    value = {\n                        retrievalLevel: value.retrievalLevel,\n                        lhs: value.lhs,\n                        declareLocalCallback: value.declareLocalCallback,\n                        declare: false,\n                        priority: value.priority,\n                        localRef: value.localRef\n                    };\n                    // Cache the value locally.\n                    this.map.set(name, value);\n                    // Possibly generate a shared context var\n                    this.maybeGenerateSharedContextVar(value);\n                    this.maybeRestoreView(value.retrievalLevel, value.localRef);\n                }\n                if (value.declareLocalCallback && !value.declare) {\n                    value.declare = true;\n                }\n                return value.lhs;\n            }\n            current = current.parent;\n        }\n        // If we get to this point, we are looking for a property on the top level component\n        // - If level === 0, we are on the top and don't need to re-declare `ctx`.\n        // - If level > 0, we are in an embedded view. We need to retrieve the name of the\n        // local var we used to store the component context, e.g. const $comp$ = x();\n        return this.bindingLevel === 0 ? null : this.getComponentProperty(name);\n    }\n    /**\n     * Create a local variable for later reference.\n     *\n     * @param retrievalLevel The level from which this value can be retrieved\n     * @param name Name of the variable.\n     * @param lhs AST representing the left hand side of the `let lhs = rhs;`.\n     * @param priority The sorting priority of this var\n     * @param declareLocalCallback The callback to invoke when declaring this local var\n     * @param localRef Whether or not this is a local ref\n     */\n    set(retrievalLevel, name, lhs, priority = 0 /* DEFAULT */, declareLocalCallback, localRef) {\n        if (this.map.has(name)) {\n            if (localRef) {\n                // Do not throw an error if it's a local ref and do not update existing value,\n                // so the first defined ref is always returned.\n                return this;\n            }\n            error(`The name ${name} is already defined in scope to be ${this.map.get(name)}`);\n        }\n        this.map.set(name, {\n            retrievalLevel: retrievalLevel,\n            lhs: lhs,\n            declare: false,\n            declareLocalCallback: declareLocalCallback,\n            priority: priority,\n            localRef: localRef || false\n        });\n        return this;\n    }\n    // Implemented as part of LocalResolver.\n    getLocal(name) {\n        return this.get(name);\n    }\n    // Implemented as part of LocalResolver.\n    notifyImplicitReceiverUse() {\n        if (this.bindingLevel !== 0) {\n            // Since the implicit receiver is accessed in an embedded view, we need to\n            // ensure that we declare a shared context variable for the current template\n            // in the update variables.\n            this.map.get(SHARED_CONTEXT_KEY + 0).declare = true;\n        }\n    }\n    nestedScope(level) {\n        const newScope = new BindingScope(level, this);\n        if (level > 0)\n            newScope.generateSharedContextVar(0);\n        return newScope;\n    }\n    /**\n     * Gets or creates a shared context variable and returns its expression. Note that\n     * this does not mean that the shared variable will be declared. Variables in the\n     * binding scope will be only declared if they are used.\n     */\n    getOrCreateSharedContextVar(retrievalLevel) {\n        const bindingKey = SHARED_CONTEXT_KEY + retrievalLevel;\n        if (!this.map.has(bindingKey)) {\n            this.generateSharedContextVar(retrievalLevel);\n        }\n        // Shared context variables are always generated as \"ReadVarExpr\".\n        return this.map.get(bindingKey).lhs;\n    }\n    getSharedContextName(retrievalLevel) {\n        const sharedCtxObj = this.map.get(SHARED_CONTEXT_KEY + retrievalLevel);\n        // Shared context variables are always generated as \"ReadVarExpr\".\n        return sharedCtxObj && sharedCtxObj.declare ? sharedCtxObj.lhs : null;\n    }\n    maybeGenerateSharedContextVar(value) {\n        if (value.priority === 1 /* CONTEXT */ &&\n            value.retrievalLevel < this.bindingLevel) {\n            const sharedCtxObj = this.map.get(SHARED_CONTEXT_KEY + value.retrievalLevel);\n            if (sharedCtxObj) {\n                sharedCtxObj.declare = true;\n            }\n            else {\n                this.generateSharedContextVar(value.retrievalLevel);\n            }\n        }\n    }\n    generateSharedContextVar(retrievalLevel) {\n        const lhs = variable(CONTEXT_NAME + this.freshReferenceName());\n        this.map.set(SHARED_CONTEXT_KEY + retrievalLevel, {\n            retrievalLevel: retrievalLevel,\n            lhs: lhs,\n            declareLocalCallback: (scope, relativeLevel) => {\n                // const ctx_r0 = nextContext(2);\n                return [lhs.set(generateNextContextExpr(relativeLevel)).toConstDecl()];\n            },\n            declare: false,\n            priority: 2 /* SHARED_CONTEXT */,\n            localRef: false\n        });\n    }\n    getComponentProperty(name) {\n        const componentValue = this.map.get(SHARED_CONTEXT_KEY + 0);\n        componentValue.declare = true;\n        this.maybeRestoreView(0, false);\n        return componentValue.lhs.prop(name);\n    }\n    maybeRestoreView(retrievalLevel, localRefLookup) {\n        // We want to restore the current view in listener fns if:\n        // 1 - we are accessing a value in a parent view, which requires walking the view tree rather\n        // than using the ctx arg. In this case, the retrieval and binding level will be different.\n        // 2 - we are looking up a local ref, which requires restoring the view where the local\n        // ref is stored\n        if (this.isListenerScope() && (retrievalLevel < this.bindingLevel || localRefLookup)) {\n            if (!this.parent.restoreViewVariable) {\n                // parent saves variable to generate a shared `const $s$ = getCurrentView();` instruction\n                this.parent.restoreViewVariable = variable(this.parent.freshReferenceName());\n            }\n            this.restoreViewVariable = this.parent.restoreViewVariable;\n        }\n    }\n    restoreViewStatement() {\n        // restoreView($state$);\n        return this.restoreViewVariable ?\n            [instruction(null, Identifiers$1.restoreView, [this.restoreViewVariable]).toStmt()] :\n            [];\n    }\n    viewSnapshotStatements() {\n        // const $state$ = getCurrentView();\n        const getCurrentViewInstruction = instruction(null, Identifiers$1.getCurrentView, []);\n        return this.restoreViewVariable ?\n            [this.restoreViewVariable.set(getCurrentViewInstruction).toConstDecl()] :\n            [];\n    }\n    isListenerScope() {\n        return this.parent && this.parent.bindingLevel === this.bindingLevel;\n    }\n    variableDeclarations() {\n        let currentContextLevel = 0;\n        return Array.from(this.map.values())\n            .filter(value => value.declare)\n            .sort((a, b) => b.retrievalLevel - a.retrievalLevel || b.priority - a.priority)\n            .reduce((stmts, value) => {\n            const levelDiff = this.bindingLevel - value.retrievalLevel;\n            const currStmts = value.declareLocalCallback(this, levelDiff - currentContextLevel);\n            currentContextLevel = levelDiff;\n            return stmts.concat(currStmts);\n        }, []);\n    }\n    freshReferenceName() {\n        let current = this;\n        // Find the top scope as it maintains the global reference count\n        while (current.parent)\n            current = current.parent;\n        const ref = `${REFERENCE_PREFIX}${current.referenceNameIndex++}`;\n        return ref;\n    }\n}\n/**\n * Creates a `CssSelector` given a tag name and a map of attributes\n */\nfunction createCssSelector(elementName, attributes) {\n    const cssSelector = new CssSelector();\n    const elementNameNoNs = splitNsName(elementName)[1];\n    cssSelector.setElement(elementNameNoNs);\n    Object.getOwnPropertyNames(attributes).forEach((name) => {\n        const nameNoNs = splitNsName(name)[1];\n        const value = attributes[name];\n        cssSelector.addAttribute(nameNoNs, value);\n        if (name.toLowerCase() === 'class') {\n            const classes = value.trim().split(/\\s+/);\n            classes.forEach(className => cssSelector.addClassName(className));\n        }\n    });\n    return cssSelector;\n}\n/**\n * Creates an array of expressions out of an `ngProjectAs` attributes\n * which can be added to the instruction parameters.\n */\nfunction getNgProjectAsLiteral(attribute) {\n    // Parse the attribute value into a CssSelectorList. Note that we only take the\n    // first selector, because we don't support multiple selectors in ngProjectAs.\n    const parsedR3Selector = parseSelectorToR3Selector(attribute.value)[0];\n    return [literal(5 /* ProjectAs */), asLiteral(parsedR3Selector)];\n}\n/**\n * Gets the instruction to generate for an interpolated property\n * @param interpolation An Interpolation AST\n */\nfunction getPropertyInterpolationExpression(interpolation) {\n    switch (getInterpolationArgsLength(interpolation)) {\n        case 1:\n            return Identifiers$1.propertyInterpolate;\n        case 3:\n            return Identifiers$1.propertyInterpolate1;\n        case 5:\n            return Identifiers$1.propertyInterpolate2;\n        case 7:\n            return Identifiers$1.propertyInterpolate3;\n        case 9:\n            return Identifiers$1.propertyInterpolate4;\n        case 11:\n            return Identifiers$1.propertyInterpolate5;\n        case 13:\n            return Identifiers$1.propertyInterpolate6;\n        case 15:\n            return Identifiers$1.propertyInterpolate7;\n        case 17:\n            return Identifiers$1.propertyInterpolate8;\n        default:\n            return Identifiers$1.propertyInterpolateV;\n    }\n}\n/**\n * Gets the instruction to generate for an interpolated attribute\n * @param interpolation An Interpolation AST\n */\nfunction getAttributeInterpolationExpression(interpolation) {\n    switch (getInterpolationArgsLength(interpolation)) {\n        case 3:\n            return Identifiers$1.attributeInterpolate1;\n        case 5:\n            return Identifiers$1.attributeInterpolate2;\n        case 7:\n            return Identifiers$1.attributeInterpolate3;\n        case 9:\n            return Identifiers$1.attributeInterpolate4;\n        case 11:\n            return Identifiers$1.attributeInterpolate5;\n        case 13:\n            return Identifiers$1.attributeInterpolate6;\n        case 15:\n            return Identifiers$1.attributeInterpolate7;\n        case 17:\n            return Identifiers$1.attributeInterpolate8;\n        default:\n            return Identifiers$1.attributeInterpolateV;\n    }\n}\n/**\n * Gets the instruction to generate for interpolated text.\n * @param interpolation An Interpolation AST\n */\nfunction getTextInterpolationExpression(interpolation) {\n    switch (getInterpolationArgsLength(interpolation)) {\n        case 1:\n            return Identifiers$1.textInterpolate;\n        case 3:\n            return Identifiers$1.textInterpolate1;\n        case 5:\n            return Identifiers$1.textInterpolate2;\n        case 7:\n            return Identifiers$1.textInterpolate3;\n        case 9:\n            return Identifiers$1.textInterpolate4;\n        case 11:\n            return Identifiers$1.textInterpolate5;\n        case 13:\n            return Identifiers$1.textInterpolate6;\n        case 15:\n            return Identifiers$1.textInterpolate7;\n        case 17:\n            return Identifiers$1.textInterpolate8;\n        default:\n            return Identifiers$1.textInterpolateV;\n    }\n}\n/**\n * Parse a template into render3 `Node`s and additional metadata, with no other dependencies.\n *\n * @param template text of the template to parse\n * @param templateUrl URL to use for source mapping of the parsed template\n * @param options options to modify how the template is parsed\n */\nfunction parseTemplate(template, templateUrl, options = {}) {\n    const { interpolationConfig, preserveWhitespaces, enableI18nLegacyMessageIdFormat } = options;\n    const bindingParser = makeBindingParser(interpolationConfig);\n    const htmlParser = new HtmlParser();\n    const parseResult = htmlParser.parse(template, templateUrl, Object.assign(Object.assign({ leadingTriviaChars: LEADING_TRIVIA_CHARS }, options), { tokenizeExpansionForms: true }));\n    if (parseResult.errors && parseResult.errors.length > 0) {\n        return {\n            errors: parseResult.errors,\n            nodes: [],\n            styleUrls: [],\n            styles: [],\n            ngContentSelectors: []\n        };\n    }\n    let rootNodes = parseResult.rootNodes;\n    // process i18n meta information (scan attributes, generate ids)\n    // before we run whitespace removal process, because existing i18n\n    // extraction process (ng xi18n) relies on a raw content to generate\n    // message ids\n    const i18nMetaVisitor = new I18nMetaVisitor(interpolationConfig, /* keepI18nAttrs */ !preserveWhitespaces, enableI18nLegacyMessageIdFormat);\n    rootNodes = visitAll$1(i18nMetaVisitor, rootNodes);\n    if (!preserveWhitespaces) {\n        rootNodes = visitAll$1(new WhitespaceVisitor(), rootNodes);\n        // run i18n meta visitor again in case whitespaces are removed (because that might affect\n        // generated i18n message content) and first pass indicated that i18n content is present in a\n        // template. During this pass i18n IDs generated at the first pass will be preserved, so we can\n        // mimic existing extraction process (ng xi18n)\n        if (i18nMetaVisitor.hasI18nMeta) {\n            rootNodes = visitAll$1(new I18nMetaVisitor(interpolationConfig, /* keepI18nAttrs */ false), rootNodes);\n        }\n    }\n    const { nodes, errors, styleUrls, styles, ngContentSelectors } = htmlAstToRender3Ast(rootNodes, bindingParser);\n    if (errors && errors.length > 0) {\n        return { errors, nodes: [], styleUrls: [], styles: [], ngContentSelectors: [] };\n    }\n    return { nodes, styleUrls, styles, ngContentSelectors };\n}\nconst elementRegistry = new DomElementSchemaRegistry();\n/**\n * Construct a `BindingParser` with a default configuration.\n */\nfunction makeBindingParser(interpolationConfig = DEFAULT_INTERPOLATION_CONFIG) {\n    return new BindingParser(new IvyParser(new Lexer()), interpolationConfig, elementRegistry, null, []);\n}\nfunction resolveSanitizationFn(context, isAttribute) {\n    switch (context) {\n        case SecurityContext.HTML:\n            return importExpr(Identifiers$1.sanitizeHtml);\n        case SecurityContext.SCRIPT:\n            return importExpr(Identifiers$1.sanitizeScript);\n        case SecurityContext.STYLE:\n            // the compiler does not fill in an instruction for [style.prop?] binding\n            // values because the style algorithm knows internally what props are subject\n            // to sanitization (only [attr.style] values are explicitly sanitized)\n            return isAttribute ? importExpr(Identifiers$1.sanitizeStyle) : null;\n        case SecurityContext.URL:\n            return importExpr(Identifiers$1.sanitizeUrl);\n        case SecurityContext.RESOURCE_URL:\n            return importExpr(Identifiers$1.sanitizeResourceUrl);\n        default:\n            return null;\n    }\n}\nfunction isSingleElementTemplate(children) {\n    return children.length === 1 && children[0] instanceof Element;\n}\nfunction isTextNode(node) {\n    return node instanceof Text || node instanceof BoundText || node instanceof Icu;\n}\nfunction hasTextChildrenOnly(children) {\n    return children.every(isTextNode);\n}\n/** Name of the global variable that is used to determine if we use Closure translations or not */\nconst NG_I18N_CLOSURE_MODE = 'ngI18nClosureMode';\n/**\n * Generate statements that define a given translation message.\n *\n * ```\n * var I18N_1;\n * if (typeof ngI18nClosureMode !== undefined && ngI18nClosureMode) {\n *     var MSG_EXTERNAL_XXX = goog.getMsg(\n *          \"Some message with {$interpolation}!\",\n *          { \"interpolation\": \"\\uFFFD0\\uFFFD\" }\n *     );\n *     I18N_1 = MSG_EXTERNAL_XXX;\n * }\n * else {\n *     I18N_1 = $localize`Some message with ${'\\uFFFD0\\uFFFD'}!`;\n * }\n * ```\n *\n * @param message The original i18n AST message node\n * @param variable The variable that will be assigned the translation, e.g. `I18N_1`.\n * @param closureVar The variable for Closure `goog.getMsg` calls, e.g. `MSG_EXTERNAL_XXX`.\n * @param params Object mapping placeholder names to their values (e.g.\n * `{ \"interpolation\": \"\\uFFFD0\\uFFFD\" }`).\n * @param transformFn Optional transformation function that will be applied to the translation (e.g.\n * post-processing).\n * @returns An array of statements that defined a given translation.\n */\nfunction getTranslationDeclStmts(message, variable, closureVar, params = {}, transformFn) {\n    const statements = [\n        declareI18nVariable(variable),\n        ifStmt(createClosureModeGuard(), createGoogleGetMsgStatements(variable, message, closureVar, i18nFormatPlaceholderNames(params, /* useCamelCase */ true)), createLocalizeStatements(variable, message, i18nFormatPlaceholderNames(params, /* useCamelCase */ false))),\n    ];\n    if (transformFn) {\n        statements.push(new ExpressionStatement(variable.set(transformFn(variable))));\n    }\n    return statements;\n}\n/**\n * Create the expression that will be used to guard the closure mode block\n * It is equivalent to:\n *\n * ```\n * typeof ngI18nClosureMode !== undefined && ngI18nClosureMode\n * ```\n */\nfunction createClosureModeGuard() {\n    return typeofExpr(variable(NG_I18N_CLOSURE_MODE))\n        .notIdentical(literal('undefined', STRING_TYPE))\n        .and(variable(NG_I18N_CLOSURE_MODE));\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst EMPTY_ARRAY = [];\n// This regex matches any binding names that contain the \"attr.\" prefix, e.g. \"attr.required\"\n// If there is a match, the first matching group will contain the attribute name to bind.\nconst ATTR_REGEX = /attr\\.([^\\]]+)/;\nfunction baseDirectiveFields(meta, constantPool, bindingParser) {\n    const definitionMap = new DefinitionMap();\n    const selectors = parseSelectorToR3Selector(meta.selector);\n    // e.g. `type: MyDirective`\n    definitionMap.set('type', meta.internalType);\n    // e.g. `selectors: [['', 'someDir', '']]`\n    if (selectors.length > 0) {\n        definitionMap.set('selectors', asLiteral(selectors));\n    }\n    if (meta.queries.length > 0) {\n        // e.g. `contentQueries: (rf, ctx, dirIndex) => { ... }\n        definitionMap.set('contentQueries', createContentQueriesFunction(meta.queries, constantPool, meta.name));\n    }\n    if (meta.viewQueries.length) {\n        definitionMap.set('viewQuery', createViewQueriesFunction(meta.viewQueries, constantPool, meta.name));\n    }\n    // e.g. `hostBindings: (rf, ctx) => { ... }\n    definitionMap.set('hostBindings', createHostBindingsFunction(meta.host, meta.typeSourceSpan, bindingParser, constantPool, meta.selector || '', meta.name, definitionMap));\n    // e.g 'inputs: {a: 'a'}`\n    definitionMap.set('inputs', conditionallyCreateMapObjectLiteral(meta.inputs, true));\n    // e.g 'outputs: {a: 'a'}`\n    definitionMap.set('outputs', conditionallyCreateMapObjectLiteral(meta.outputs));\n    if (meta.exportAs !== null) {\n        definitionMap.set('exportAs', literalArr(meta.exportAs.map(e => literal(e))));\n    }\n    return definitionMap;\n}\n/**\n * Add features to the definition map.\n */\nfunction addFeatures(definitionMap, meta) {\n    // e.g. `features: [NgOnChangesFeature]`\n    const features = [];\n    const providers = meta.providers;\n    const viewProviders = meta.viewProviders;\n    if (providers || viewProviders) {\n        const args = [providers || new LiteralArrayExpr([])];\n        if (viewProviders) {\n            args.push(viewProviders);\n        }\n        features.push(importExpr(Identifiers$1.ProvidersFeature).callFn(args));\n    }\n    if (meta.usesInheritance) {\n        features.push(importExpr(Identifiers$1.InheritDefinitionFeature));\n    }\n    if (meta.fullInheritance) {\n        features.push(importExpr(Identifiers$1.CopyDefinitionFeature));\n    }\n    if (meta.lifecycle.usesOnChanges) {\n        features.push(importExpr(Identifiers$1.NgOnChangesFeature));\n    }\n    if (features.length) {\n        definitionMap.set('features', literalArr(features));\n    }\n}\n/**\n * Compile a directive for the render3 runtime as defined by the `R3DirectiveMetadata`.\n */\nfunction compileDirectiveFromMetadata(meta, constantPool, bindingParser) {\n    const definitionMap = baseDirectiveFields(meta, constantPool, bindingParser);\n    addFeatures(definitionMap, meta);\n    const expression = importExpr(Identifiers$1.defineDirective).callFn([definitionMap.toLiteralMap()]);\n    const typeParams = createDirectiveTypeParams(meta);\n    const type = expressionType(importExpr(Identifiers$1.DirectiveDefWithMeta, typeParams));\n    return { expression, type };\n}\n/**\n * Compile a component for the render3 runtime as defined by the `R3ComponentMetadata`.\n */\nfunction compileComponentFromMetadata(meta, constantPool, bindingParser) {\n    const definitionMap = baseDirectiveFields(meta, constantPool, bindingParser);\n    addFeatures(definitionMap, meta);\n    const selector = meta.selector && CssSelector.parse(meta.selector);\n    const firstSelector = selector && selector[0];\n    // e.g. `attr: [\"class\", \".my.app\"]`\n    // This is optional an only included if the first selector of a component specifies attributes.\n    if (firstSelector) {\n        const selectorAttributes = firstSelector.getAttrs();\n        if (selectorAttributes.length) {\n            definitionMap.set('attrs', constantPool.getConstLiteral(literalArr(selectorAttributes.map(value => value != null ? literal(value) : literal(undefined))), \n            /* forceShared */ true));\n        }\n    }\n    // Generate the CSS matcher that recognize directive\n    let directiveMatcher = null;\n    if (meta.directives.length > 0) {\n        const matcher = new SelectorMatcher();\n        for (const { selector, expression } of meta.directives) {\n            matcher.addSelectables(CssSelector.parse(selector), expression);\n        }\n        directiveMatcher = matcher;\n    }\n    // e.g. `template: function MyComponent_Template(_ctx, _cm) {...}`\n    const templateTypeName = meta.name;\n    const templateName = templateTypeName ? `${templateTypeName}_Template` : null;\n    const directivesUsed = new Set();\n    const pipesUsed = new Set();\n    const changeDetection = meta.changeDetection;\n    const template = meta.template;\n    const templateBuilder = new TemplateDefinitionBuilder(constantPool, BindingScope.createRootScope(), 0, templateTypeName, null, null, templateName, directiveMatcher, directivesUsed, meta.pipes, pipesUsed, Identifiers$1.namespaceHTML, meta.relativeContextFilePath, meta.i18nUseExternalIds);\n    const templateFunctionExpression = templateBuilder.buildTemplateFunction(template.nodes, []);\n    // We need to provide this so that dynamically generated components know what\n    // projected content blocks to pass through to the component when it is instantiated.\n    const ngContentSelectors = templateBuilder.getNgContentSelectors();\n    if (ngContentSelectors) {\n        definitionMap.set('ngContentSelectors', ngContentSelectors);\n    }\n    // e.g. `decls: 2`\n    definitionMap.set('decls', literal(templateBuilder.getConstCount()));\n    // e.g. `vars: 2`\n    definitionMap.set('vars', literal(templateBuilder.getVarCount()));\n    // Generate `consts` section of ComponentDef:\n    // - either as an array:\n    //   `consts: [['one', 'two'], ['three', 'four']]`\n    // - or as a factory function in case additional statements are present (to support i18n):\n    //   `consts: function() { var i18n_0; if (ngI18nClosureMode) {...} else {...} return [i18n_0]; }`\n    const { constExpressions, prepareStatements } = templateBuilder.getConsts();\n    if (constExpressions.length > 0) {\n        let constsExpr = literalArr(constExpressions);\n        // Prepare statements are present - turn `consts` into a function.\n        if (prepareStatements.length > 0) {\n            constsExpr = fn([], [...prepareStatements, new ReturnStatement(constsExpr)]);\n        }\n        definitionMap.set('consts', constsExpr);\n    }\n    definitionMap.set('template', templateFunctionExpression);\n    // e.g. `directives: [MyDirective]`\n    if (directivesUsed.size) {\n        let directivesExpr = literalArr(Array.from(directivesUsed));\n        if (meta.wrapDirectivesAndPipesInClosure) {\n            directivesExpr = fn([], [new ReturnStatement(directivesExpr)]);\n        }\n        definitionMap.set('directives', directivesExpr);\n    }\n    // e.g. `pipes: [MyPipe]`\n    if (pipesUsed.size) {\n        let pipesExpr = literalArr(Array.from(pipesUsed));\n        if (meta.wrapDirectivesAndPipesInClosure) {\n            pipesExpr = fn([], [new ReturnStatement(pipesExpr)]);\n        }\n        definitionMap.set('pipes', pipesExpr);\n    }\n    if (meta.encapsulation === null) {\n        meta.encapsulation = ViewEncapsulation.Emulated;\n    }\n    // e.g. `styles: [str1, str2]`\n    if (meta.styles && meta.styles.length) {\n        const styleValues = meta.encapsulation == ViewEncapsulation.Emulated ?\n            compileStyles(meta.styles, CONTENT_ATTR, HOST_ATTR) :\n            meta.styles;\n        const strings = styleValues.map(str => constantPool.getConstLiteral(literal(str)));\n        definitionMap.set('styles', literalArr(strings));\n    }\n    else if (meta.encapsulation === ViewEncapsulation.Emulated) {\n        // If there is no style, don't generate css selectors on elements\n        meta.encapsulation = ViewEncapsulation.None;\n    }\n    // Only set view encapsulation if it's not the default value\n    if (meta.encapsulation !== ViewEncapsulation.Emulated) {\n        definitionMap.set('encapsulation', literal(meta.encapsulation));\n    }\n    // e.g. `animation: [trigger('123', [])]`\n    if (meta.animations !== null) {\n        definitionMap.set('data', literalMap([{ key: 'animation', value: meta.animations, quoted: false }]));\n    }\n    // Only set the change detection flag if it's defined and it's not the default.\n    if (changeDetection != null && changeDetection !== ChangeDetectionStrategy.Default) {\n        definitionMap.set('changeDetection', literal(changeDetection));\n    }\n    const expression = importExpr(Identifiers$1.defineComponent).callFn([definitionMap.toLiteralMap()]);\n    const typeParams = createDirectiveTypeParams(meta);\n    typeParams.push(stringArrayAsType(meta.template.ngContentSelectors));\n    const type = expressionType(importExpr(Identifiers$1.ComponentDefWithMeta, typeParams));\n    return { expression, type };\n}\n/**\n * A wrapper around `compileDirective` which depends on render2 global analysis data as its input\n * instead of the `R3DirectiveMetadata`.\n *\n * `R3DirectiveMetadata` is computed from `CompileDirectiveMetadata` and other statically reflected\n * information.\n */\nfunction compileDirectiveFromRender2(outputCtx, directive, reflector, bindingParser) {\n    const name = identifierName(directive.type);\n    name || error(`Cannot resolver the name of ${directive.type}`);\n    const definitionField = outputCtx.constantPool.propertyNameOf(1 /* Directive */);\n    const meta = directiveMetadataFromGlobalMetadata(directive, outputCtx, reflector);\n    const res = compileDirectiveFromMetadata(meta, outputCtx.constantPool, bindingParser);\n    const factoryRes = compileFactoryFunction(Object.assign(Object.assign({}, meta), { injectFn: Identifiers$1.directiveInject, target: R3FactoryTarget.Directive }));\n    const ngFactoryDefStatement = new ClassStmt(name, null, [new ClassField('ɵfac', INFERRED_TYPE, [StmtModifier.Static], factoryRes.factory)], [], new ClassMethod(null, [], []), []);\n    const directiveDefStatement = new ClassStmt(name, null, [new ClassField(definitionField, INFERRED_TYPE, [StmtModifier.Static], res.expression)], [], new ClassMethod(null, [], []), []);\n    // Create the partial class to be merged with the actual class.\n    outputCtx.statements.push(ngFactoryDefStatement, directiveDefStatement);\n}\n/**\n * A wrapper around `compileComponent` which depends on render2 global analysis data as its input\n * instead of the `R3DirectiveMetadata`.\n *\n * `R3ComponentMetadata` is computed from `CompileDirectiveMetadata` and other statically reflected\n * information.\n */\nfunction compileComponentFromRender2(outputCtx, component, render3Ast, reflector, bindingParser, directiveTypeBySel, pipeTypeByName) {\n    const name = identifierName(component.type);\n    name || error(`Cannot resolver the name of ${component.type}`);\n    const definitionField = outputCtx.constantPool.propertyNameOf(2 /* Component */);\n    const summary = component.toSummary();\n    // Compute the R3ComponentMetadata from the CompileDirectiveMetadata\n    const meta = Object.assign(Object.assign({}, directiveMetadataFromGlobalMetadata(component, outputCtx, reflector)), { selector: component.selector, template: { nodes: render3Ast.nodes, ngContentSelectors: render3Ast.ngContentSelectors }, directives: [], pipes: typeMapToExpressionMap(pipeTypeByName, outputCtx), viewQueries: queriesFromGlobalMetadata(component.viewQueries, outputCtx), wrapDirectivesAndPipesInClosure: false, styles: (summary.template && summary.template.styles) || EMPTY_ARRAY, encapsulation: (summary.template && summary.template.encapsulation) || ViewEncapsulation.Emulated, interpolation: DEFAULT_INTERPOLATION_CONFIG, animations: null, viewProviders: component.viewProviders.length > 0 ? new WrappedNodeExpr(component.viewProviders) : null, relativeContextFilePath: '', i18nUseExternalIds: true });\n    const res = compileComponentFromMetadata(meta, outputCtx.constantPool, bindingParser);\n    const factoryRes = compileFactoryFunction(Object.assign(Object.assign({}, meta), { injectFn: Identifiers$1.directiveInject, target: R3FactoryTarget.Directive }));\n    const ngFactoryDefStatement = new ClassStmt(name, null, [new ClassField('ɵfac', INFERRED_TYPE, [StmtModifier.Static], factoryRes.factory)], [], new ClassMethod(null, [], []), []);\n    const componentDefStatement = new ClassStmt(name, null, [new ClassField(definitionField, INFERRED_TYPE, [StmtModifier.Static], res.expression)], [], new ClassMethod(null, [], []), []);\n    // Create the partial class to be merged with the actual class.\n    outputCtx.statements.push(ngFactoryDefStatement, componentDefStatement);\n}\n/**\n * Compute `R3DirectiveMetadata` given `CompileDirectiveMetadata` and a `CompileReflector`.\n */\nfunction directiveMetadataFromGlobalMetadata(directive, outputCtx, reflector) {\n    // The global-analysis based Ivy mode in ngc is no longer utilized/supported.\n    throw new Error('unsupported');\n}\n/**\n * Convert `CompileQueryMetadata` into `R3QueryMetadata`.\n */\nfunction queriesFromGlobalMetadata(queries, outputCtx) {\n    return queries.map(query => {\n        let read = null;\n        if (query.read && query.read.identifier) {\n            read = outputCtx.importExpr(query.read.identifier.reference);\n        }\n        return {\n            propertyName: query.propertyName,\n            first: query.first,\n            predicate: selectorsFromGlobalMetadata(query.selectors, outputCtx),\n            descendants: query.descendants,\n            read,\n            static: !!query.static\n        };\n    });\n}\n/**\n * Convert `CompileTokenMetadata` for query selectors into either an expression for a predicate\n * type, or a list of string predicates.\n */\nfunction selectorsFromGlobalMetadata(selectors, outputCtx) {\n    if (selectors.length > 1 || (selectors.length == 1 && selectors[0].value)) {\n        const selectorStrings = selectors.map(value => value.value);\n        selectorStrings.some(value => !value) &&\n            error('Found a type among the string selectors expected');\n        return outputCtx.constantPool.getConstLiteral(literalArr(selectorStrings.map(value => literal(value))));\n    }\n    if (selectors.length == 1) {\n        const first = selectors[0];\n        if (first.identifier) {\n            return outputCtx.importExpr(first.identifier.reference);\n        }\n    }\n    error('Unexpected query form');\n    return NULL_EXPR;\n}\nfunction prepareQueryParams(query, constantPool) {\n    const parameters = [getQueryPredicate(query, constantPool), literal(query.descendants)];\n    if (query.read) {\n        parameters.push(query.read);\n    }\n    return parameters;\n}\nfunction convertAttributesToExpressions(attributes) {\n    const values = [];\n    for (let key of Object.getOwnPropertyNames(attributes)) {\n        const value = attributes[key];\n        values.push(literal(key), value);\n    }\n    return values;\n}\n// Define and update any content queries\nfunction createContentQueriesFunction(queries, constantPool, name) {\n    const createStatements = [];\n    const updateStatements = [];\n    const tempAllocator = temporaryAllocator(updateStatements, TEMPORARY_NAME);\n    for (const query of queries) {\n        const queryInstruction = query.static ? Identifiers$1.staticContentQuery : Identifiers$1.contentQuery;\n        // creation, e.g. r3.contentQuery(dirIndex, somePredicate, true, null);\n        createStatements.push(importExpr(queryInstruction)\n            .callFn([variable('dirIndex'), ...prepareQueryParams(query, constantPool)])\n            .toStmt());\n        // update, e.g. (r3.queryRefresh(tmp = r3.loadQuery()) && (ctx.someDir = tmp));\n        const temporary = tempAllocator();\n        const getQueryList = importExpr(Identifiers$1.loadQuery).callFn([]);\n        const refresh = importExpr(Identifiers$1.queryRefresh).callFn([temporary.set(getQueryList)]);\n        const updateDirective = variable(CONTEXT_NAME)\n            .prop(query.propertyName)\n            .set(query.first ? temporary.prop('first') : temporary);\n        updateStatements.push(refresh.and(updateDirective).toStmt());\n    }\n    const contentQueriesFnName = name ? `${name}_ContentQueries` : null;\n    return fn([\n        new FnParam(RENDER_FLAGS, NUMBER_TYPE), new FnParam(CONTEXT_NAME, null),\n        new FnParam('dirIndex', null)\n    ], [\n        renderFlagCheckIfStmt(1 /* Create */, createStatements),\n        renderFlagCheckIfStmt(2 /* Update */, updateStatements)\n    ], INFERRED_TYPE, null, contentQueriesFnName);\n}\nfunction stringAsType(str) {\n    return expressionType(literal(str));\n}\nfunction stringMapAsType(map) {\n    const mapValues = Object.keys(map).map(key => {\n        const value = Array.isArray(map[key]) ? map[key][0] : map[key];\n        return {\n            key,\n            value: literal(value),\n            quoted: true,\n        };\n    });\n    return expressionType(literalMap(mapValues));\n}\nfunction stringArrayAsType(arr) {\n    return arr.length > 0 ? expressionType(literalArr(arr.map(value => literal(value)))) :\n        NONE_TYPE;\n}\nfunction createDirectiveTypeParams(meta) {\n    // On the type side, remove newlines from the selector as it will need to fit into a TypeScript\n    // string literal, which must be on one line.\n    const selectorForType = meta.selector !== null ? meta.selector.replace(/\\n/g, '') : null;\n    return [\n        typeWithParameters(meta.type.type, meta.typeArgumentCount),\n        selectorForType !== null ? stringAsType(selectorForType) : NONE_TYPE,\n        meta.exportAs !== null ? stringArrayAsType(meta.exportAs) : NONE_TYPE,\n        stringMapAsType(meta.inputs),\n        stringMapAsType(meta.outputs),\n        stringArrayAsType(meta.queries.map(q => q.propertyName)),\n    ];\n}\n// Define and update any view queries\nfunction createViewQueriesFunction(viewQueries, constantPool, name) {\n    const createStatements = [];\n    const updateStatements = [];\n    const tempAllocator = temporaryAllocator(updateStatements, TEMPORARY_NAME);\n    viewQueries.forEach((query) => {\n        const queryInstruction = query.static ? Identifiers$1.staticViewQuery : Identifiers$1.viewQuery;\n        // creation, e.g. r3.viewQuery(somePredicate, true);\n        const queryDefinition = importExpr(queryInstruction).callFn(prepareQueryParams(query, constantPool));\n        createStatements.push(queryDefinition.toStmt());\n        // update, e.g. (r3.queryRefresh(tmp = r3.loadQuery()) && (ctx.someDir = tmp));\n        const temporary = tempAllocator();\n        const getQueryList = importExpr(Identifiers$1.loadQuery).callFn([]);\n        const refresh = importExpr(Identifiers$1.queryRefresh).callFn([temporary.set(getQueryList)]);\n        const updateDirective = variable(CONTEXT_NAME)\n            .prop(query.propertyName)\n            .set(query.first ? temporary.prop('first') : temporary);\n        updateStatements.push(refresh.and(updateDirective).toStmt());\n    });\n    const viewQueryFnName = name ? `${name}_Query` : null;\n    return fn([new FnParam(RENDER_FLAGS, NUMBER_TYPE), new FnParam(CONTEXT_NAME, null)], [\n        renderFlagCheckIfStmt(1 /* Create */, createStatements),\n        renderFlagCheckIfStmt(2 /* Update */, updateStatements)\n    ], INFERRED_TYPE, null, viewQueryFnName);\n}\n// Return a host binding function or null if one is not necessary.\nfunction createHostBindingsFunction(hostBindingsMetadata, typeSourceSpan, bindingParser, constantPool, selector, name, definitionMap) {\n    const bindingContext = variable(CONTEXT_NAME);\n    const styleBuilder = new StylingBuilder(bindingContext);\n    const { styleAttr, classAttr } = hostBindingsMetadata.specialAttributes;\n    if (styleAttr !== undefined) {\n        styleBuilder.registerStyleAttr(styleAttr);\n    }\n    if (classAttr !== undefined) {\n        styleBuilder.registerClassAttr(classAttr);\n    }\n    const createStatements = [];\n    const updateStatements = [];\n    const hostBindingSourceSpan = typeSourceSpan;\n    const directiveSummary = metadataAsSummary(hostBindingsMetadata);\n    // Calculate host event bindings\n    const eventBindings = bindingParser.createDirectiveHostEventAsts(directiveSummary, hostBindingSourceSpan);\n    if (eventBindings && eventBindings.length) {\n        const listeners = createHostListeners(eventBindings, name);\n        createStatements.push(...listeners);\n    }\n    // Calculate the host property bindings\n    const bindings = bindingParser.createBoundHostProperties(directiveSummary, hostBindingSourceSpan);\n    const allOtherBindings = [];\n    // We need to calculate the total amount of binding slots required by\n    // all the instructions together before any value conversions happen.\n    // Value conversions may require additional slots for interpolation and\n    // bindings with pipes. These calculates happen after this block.\n    let totalHostVarsCount = 0;\n    bindings && bindings.forEach((binding) => {\n        const name = binding.name;\n        const stylingInputWasSet = styleBuilder.registerInputBasedOnName(name, binding.expression, binding.sourceSpan);\n        if (stylingInputWasSet) {\n            totalHostVarsCount += MIN_STYLING_BINDING_SLOTS_REQUIRED;\n        }\n        else {\n            allOtherBindings.push(binding);\n            totalHostVarsCount++;\n        }\n    });\n    let valueConverter;\n    const getValueConverter = () => {\n        if (!valueConverter) {\n            const hostVarsCountFn = (numSlots) => {\n                const originalVarsCount = totalHostVarsCount;\n                totalHostVarsCount += numSlots;\n                return originalVarsCount;\n            };\n            valueConverter = new ValueConverter(constantPool, () => error('Unexpected node'), // new nodes are illegal here\n            hostVarsCountFn, () => error('Unexpected pipe')); // pipes are illegal here\n        }\n        return valueConverter;\n    };\n    const propertyBindings = [];\n    const attributeBindings = [];\n    const syntheticHostBindings = [];\n    allOtherBindings.forEach((binding) => {\n        // resolve literal arrays and literal objects\n        const value = binding.expression.visit(getValueConverter());\n        const bindingExpr = bindingFn(bindingContext, value);\n        const { bindingName, instruction, isAttribute } = getBindingNameAndInstruction(binding);\n        const securityContexts = bindingParser.calcPossibleSecurityContexts(selector, bindingName, isAttribute)\n            .filter(context => context !== SecurityContext.NONE);\n        let sanitizerFn = null;\n        if (securityContexts.length) {\n            if (securityContexts.length === 2 &&\n                securityContexts.indexOf(SecurityContext.URL) > -1 &&\n                securityContexts.indexOf(SecurityContext.RESOURCE_URL) > -1) {\n                // Special case for some URL attributes (such as \"src\" and \"href\") that may be a part\n                // of different security contexts. In this case we use special santitization function and\n                // select the actual sanitizer at runtime based on a tag name that is provided while\n                // invoking sanitization function.\n                sanitizerFn = importExpr(Identifiers$1.sanitizeUrlOrResourceUrl);\n            }\n            else {\n                sanitizerFn = resolveSanitizationFn(securityContexts[0], isAttribute);\n            }\n        }\n        const instructionParams = [literal(bindingName), bindingExpr.currValExpr];\n        if (sanitizerFn) {\n            instructionParams.push(sanitizerFn);\n        }\n        updateStatements.push(...bindingExpr.stmts);\n        if (instruction === Identifiers$1.hostProperty) {\n            propertyBindings.push(instructionParams);\n        }\n        else if (instruction === Identifiers$1.attribute) {\n            attributeBindings.push(instructionParams);\n        }\n        else if (instruction === Identifiers$1.syntheticHostProperty) {\n            syntheticHostBindings.push(instructionParams);\n        }\n        else {\n            updateStatements.push(importExpr(instruction).callFn(instructionParams).toStmt());\n        }\n    });\n    if (propertyBindings.length > 0) {\n        updateStatements.push(chainedInstruction(Identifiers$1.hostProperty, propertyBindings).toStmt());\n    }\n    if (attributeBindings.length > 0) {\n        updateStatements.push(chainedInstruction(Identifiers$1.attribute, attributeBindings).toStmt());\n    }\n    if (syntheticHostBindings.length > 0) {\n        updateStatements.push(chainedInstruction(Identifiers$1.syntheticHostProperty, syntheticHostBindings).toStmt());\n    }\n    // since we're dealing with directives/components and both have hostBinding\n    // functions, we need to generate a special hostAttrs instruction that deals\n    // with both the assignment of styling as well as static attributes to the host\n    // element. The instruction below will instruct all initial styling (styling\n    // that is inside of a host binding within a directive/component) to be attached\n    // to the host element alongside any of the provided host attributes that were\n    // collected earlier.\n    const hostAttrs = convertAttributesToExpressions(hostBindingsMetadata.attributes);\n    styleBuilder.assignHostAttrs(hostAttrs, definitionMap);\n    if (styleBuilder.hasBindings) {\n        // finally each binding that was registered in the statement above will need to be added to\n        // the update block of a component/directive templateFn/hostBindingsFn so that the bindings\n        // are evaluated and updated for the element.\n        styleBuilder.buildUpdateLevelInstructions(getValueConverter()).forEach(instruction => {\n            if (instruction.calls.length > 0) {\n                const calls = [];\n                instruction.calls.forEach(call => {\n                    // we subtract a value of `1` here because the binding slot was already allocated\n                    // at the top of this method when all the input bindings were counted.\n                    totalHostVarsCount +=\n                        Math.max(call.allocateBindingSlots - MIN_STYLING_BINDING_SLOTS_REQUIRED, 0);\n                    calls.push(convertStylingCall(call, bindingContext, bindingFn));\n                });\n                updateStatements.push(chainedInstruction(instruction.reference, calls).toStmt());\n            }\n        });\n    }\n    if (totalHostVarsCount) {\n        definitionMap.set('hostVars', literal(totalHostVarsCount));\n    }\n    if (createStatements.length > 0 || updateStatements.length > 0) {\n        const hostBindingsFnName = name ? `${name}_HostBindings` : null;\n        const statements = [];\n        if (createStatements.length > 0) {\n            statements.push(renderFlagCheckIfStmt(1 /* Create */, createStatements));\n        }\n        if (updateStatements.length > 0) {\n            statements.push(renderFlagCheckIfStmt(2 /* Update */, updateStatements));\n        }\n        return fn([new FnParam(RENDER_FLAGS, NUMBER_TYPE), new FnParam(CONTEXT_NAME, null)], statements, INFERRED_TYPE, null, hostBindingsFnName);\n    }\n    return null;\n}\nfunction bindingFn(implicit, value) {\n    return convertPropertyBinding(null, implicit, value, 'b', BindingForm.Expression, () => error('Unexpected interpolation'));\n}\nfunction convertStylingCall(call, bindingContext, bindingFn) {\n    return call.params(value => bindingFn(bindingContext, value).currValExpr);\n}\nfunction getBindingNameAndInstruction(binding) {\n    let bindingName = binding.name;\n    let instruction;\n    // Check to see if this is an attr binding or a property binding\n    const attrMatches = bindingName.match(ATTR_REGEX);\n    if (attrMatches) {\n        bindingName = attrMatches[1];\n        instruction = Identifiers$1.attribute;\n    }\n    else {\n        if (binding.isAnimation) {\n            bindingName = prepareSyntheticPropertyName(bindingName);\n            // host bindings that have a synthetic property (e.g. @foo) should always be rendered\n            // in the context of the component and not the parent. Therefore there is a special\n            // compatibility instruction available for this purpose.\n            instruction = Identifiers$1.syntheticHostProperty;\n        }\n        else {\n            instruction = Identifiers$1.hostProperty;\n        }\n    }\n    return { bindingName, instruction, isAttribute: !!attrMatches };\n}\nfunction createHostListeners(eventBindings, name) {\n    const listeners = [];\n    const syntheticListeners = [];\n    const instructions = [];\n    eventBindings.forEach(binding => {\n        let bindingName = binding.name && sanitizeIdentifier(binding.name);\n        const bindingFnName = binding.type === 1 /* Animation */ ?\n            prepareSyntheticListenerFunctionName(bindingName, binding.targetOrPhase) :\n            bindingName;\n        const handlerName = name && bindingName ? `${name}_${bindingFnName}_HostBindingHandler` : null;\n        const params = prepareEventListenerParameters(BoundEvent.fromParsedEvent(binding), handlerName);\n        if (binding.type == 1 /* Animation */) {\n            syntheticListeners.push(params);\n        }\n        else {\n            listeners.push(params);\n        }\n    });\n    if (syntheticListeners.length > 0) {\n        instructions.push(chainedInstruction(Identifiers$1.syntheticHostListener, syntheticListeners).toStmt());\n    }\n    if (listeners.length > 0) {\n        instructions.push(chainedInstruction(Identifiers$1.listener, listeners).toStmt());\n    }\n    return instructions;\n}\nfunction metadataAsSummary(meta) {\n    // clang-format off\n    return {\n        // This is used by the BindingParser, which only deals with listeners and properties. There's no\n        // need to pass attributes to it.\n        hostAttributes: {},\n        hostListeners: meta.listeners,\n        hostProperties: meta.properties,\n    };\n    // clang-format on\n}\nfunction typeMapToExpressionMap(map, outputCtx) {\n    // Convert each map entry into another entry where the value is an expression importing the type.\n    const entries = Array.from(map).map(([key, type]) => [key, outputCtx.importExpr(type)]);\n    return new Map(entries);\n}\nconst HOST_REG_EXP$1 = /^(?:\\[([^\\]]+)\\])|(?:\\(([^\\)]+)\\))$/;\nfunction parseHostBindings(host) {\n    const attributes = {};\n    const listeners = {};\n    const properties = {};\n    const specialAttributes = {};\n    for (const key of Object.keys(host)) {\n        const value = host[key];\n        const matches = key.match(HOST_REG_EXP$1);\n        if (matches === null) {\n            switch (key) {\n                case 'class':\n                    if (typeof value !== 'string') {\n                        // TODO(alxhub): make this a diagnostic.\n                        throw new Error(`Class binding must be string`);\n                    }\n                    specialAttributes.classAttr = value;\n                    break;\n                case 'style':\n                    if (typeof value !== 'string') {\n                        // TODO(alxhub): make this a diagnostic.\n                        throw new Error(`Style binding must be string`);\n                    }\n                    specialAttributes.styleAttr = value;\n                    break;\n                default:\n                    if (typeof value === 'string') {\n                        attributes[key] = literal(value);\n                    }\n                    else {\n                        attributes[key] = value;\n                    }\n            }\n        }\n        else if (matches[1 /* Binding */] != null) {\n            if (typeof value !== 'string') {\n                // TODO(alxhub): make this a diagnostic.\n                throw new Error(`Property binding must be string`);\n            }\n            // synthetic properties (the ones that have a `@` as a prefix)\n            // are still treated the same as regular properties. Therefore\n            // there is no point in storing them in a separate map.\n            properties[matches[1 /* Binding */]] = value;\n        }\n        else if (matches[2 /* Event */] != null) {\n            if (typeof value !== 'string') {\n                // TODO(alxhub): make this a diagnostic.\n                throw new Error(`Event binding must be string`);\n            }\n            listeners[matches[2 /* Event */]] = value;\n        }\n    }\n    return { attributes, listeners, properties, specialAttributes };\n}\n/**\n * Verifies host bindings and returns the list of errors (if any). Empty array indicates that a\n * given set of host bindings has no errors.\n *\n * @param bindings set of host bindings to verify.\n * @param sourceSpan source span where host bindings were defined.\n * @returns array of errors associated with a given set of host bindings.\n */\nfunction verifyHostBindings(bindings, sourceSpan) {\n    const summary = metadataAsSummary(bindings);\n    // TODO: abstract out host bindings verification logic and use it instead of\n    // creating events and properties ASTs to detect errors (FW-996)\n    const bindingParser = makeBindingParser();\n    bindingParser.createDirectiveHostEventAsts(summary, sourceSpan);\n    bindingParser.createBoundHostProperties(summary, sourceSpan);\n    return bindingParser.errors;\n}\nfunction compileStyles(styles, selector, hostSelector) {\n    const shadowCss = new ShadowCss();\n    return styles.map(style => {\n        return shadowCss.shimCssText(style, selector, hostSelector);\n    });\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * An interface for retrieving documents by URL that the compiler uses\n * to load templates.\n */\nclass ResourceLoader {\n    get(url) {\n        return '';\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass CompilerFacadeImpl {\n    constructor(jitEvaluator = new JitEvaluator()) {\n        this.jitEvaluator = jitEvaluator;\n        this.R3ResolvedDependencyType = R3ResolvedDependencyType;\n        this.R3FactoryTarget = R3FactoryTarget;\n        this.ResourceLoader = ResourceLoader;\n        this.elementSchemaRegistry = new DomElementSchemaRegistry();\n    }\n    compilePipe(angularCoreEnv, sourceMapUrl, facade) {\n        const metadata = {\n            name: facade.name,\n            type: wrapReference$1(facade.type),\n            internalType: new WrappedNodeExpr(facade.type),\n            typeArgumentCount: facade.typeArgumentCount,\n            deps: convertR3DependencyMetadataArray(facade.deps),\n            pipeName: facade.pipeName,\n            pure: facade.pure,\n        };\n        const res = compilePipeFromMetadata(metadata);\n        return this.jitExpression(res.expression, angularCoreEnv, sourceMapUrl, []);\n    }\n    compileInjectable(angularCoreEnv, sourceMapUrl, facade) {\n        const { expression, statements } = compileInjectable({\n            name: facade.name,\n            type: wrapReference$1(facade.type),\n            internalType: new WrappedNodeExpr(facade.type),\n            typeArgumentCount: facade.typeArgumentCount,\n            providedIn: computeProvidedIn(facade.providedIn),\n            useClass: wrapExpression(facade, USE_CLASS),\n            useFactory: wrapExpression(facade, USE_FACTORY),\n            useValue: wrapExpression(facade, USE_VALUE),\n            useExisting: wrapExpression(facade, USE_EXISTING),\n            userDeps: convertR3DependencyMetadataArray(facade.userDeps) || undefined,\n        });\n        return this.jitExpression(expression, angularCoreEnv, sourceMapUrl, statements);\n    }\n    compileInjector(angularCoreEnv, sourceMapUrl, facade) {\n        const meta = {\n            name: facade.name,\n            type: wrapReference$1(facade.type),\n            internalType: new WrappedNodeExpr(facade.type),\n            deps: convertR3DependencyMetadataArray(facade.deps),\n            providers: new WrappedNodeExpr(facade.providers),\n            imports: facade.imports.map(i => new WrappedNodeExpr(i)),\n        };\n        const res = compileInjector(meta);\n        return this.jitExpression(res.expression, angularCoreEnv, sourceMapUrl, res.statements);\n    }\n    compileNgModule(angularCoreEnv, sourceMapUrl, facade) {\n        const meta = {\n            type: wrapReference$1(facade.type),\n            internalType: new WrappedNodeExpr(facade.type),\n            adjacentType: new WrappedNodeExpr(facade.type),\n            bootstrap: facade.bootstrap.map(wrapReference$1),\n            declarations: facade.declarations.map(wrapReference$1),\n            imports: facade.imports.map(wrapReference$1),\n            exports: facade.exports.map(wrapReference$1),\n            emitInline: true,\n            containsForwardDecls: false,\n            schemas: facade.schemas ? facade.schemas.map(wrapReference$1) : null,\n            id: facade.id ? new WrappedNodeExpr(facade.id) : null,\n        };\n        const res = compileNgModule(meta);\n        return this.jitExpression(res.expression, angularCoreEnv, sourceMapUrl, []);\n    }\n    compileDirective(angularCoreEnv, sourceMapUrl, facade) {\n        const constantPool = new ConstantPool();\n        const bindingParser = makeBindingParser();\n        const meta = convertDirectiveFacadeToMetadata(facade);\n        const res = compileDirectiveFromMetadata(meta, constantPool, bindingParser);\n        return this.jitExpression(res.expression, angularCoreEnv, sourceMapUrl, constantPool.statements);\n    }\n    compileComponent(angularCoreEnv, sourceMapUrl, facade) {\n        // The ConstantPool is a requirement of the JIT'er.\n        const constantPool = new ConstantPool();\n        const interpolationConfig = facade.interpolation ?\n            InterpolationConfig.fromArray(facade.interpolation) :\n            DEFAULT_INTERPOLATION_CONFIG;\n        // Parse the template and check for errors.\n        const template = parseTemplate(facade.template, sourceMapUrl, { preserveWhitespaces: facade.preserveWhitespaces, interpolationConfig });\n        if (template.errors !== undefined) {\n            const errors = template.errors.map(err => err.toString()).join(', ');\n            throw new Error(`Errors during JIT compilation of template for ${facade.name}: ${errors}`);\n        }\n        // Compile the component metadata, including template, into an expression.\n        // TODO(alxhub): implement inputs, outputs, queries, etc.\n        const metadata = Object.assign(Object.assign(Object.assign({}, facade), convertDirectiveFacadeToMetadata(facade)), { selector: facade.selector || this.elementSchemaRegistry.getDefaultComponentElementName(), template, wrapDirectivesAndPipesInClosure: false, styles: [...facade.styles, ...template.styles], encapsulation: facade.encapsulation, interpolation: interpolationConfig, changeDetection: facade.changeDetection, animations: facade.animations != null ? new WrappedNodeExpr(facade.animations) : null, viewProviders: facade.viewProviders != null ? new WrappedNodeExpr(facade.viewProviders) :\n                null, relativeContextFilePath: '', i18nUseExternalIds: true });\n        const res = compileComponentFromMetadata(metadata, constantPool, makeBindingParser(interpolationConfig));\n        const jitExpressionSourceMap = `ng:///${facade.name}.js`;\n        return this.jitExpression(res.expression, angularCoreEnv, jitExpressionSourceMap, constantPool.statements);\n    }\n    compileFactory(angularCoreEnv, sourceMapUrl, meta) {\n        const factoryRes = compileFactoryFunction({\n            name: meta.name,\n            type: wrapReference$1(meta.type),\n            internalType: new WrappedNodeExpr(meta.type),\n            typeArgumentCount: meta.typeArgumentCount,\n            deps: convertR3DependencyMetadataArray(meta.deps),\n            injectFn: meta.injectFn === 'directiveInject' ? Identifiers.directiveInject :\n                Identifiers.inject,\n            target: meta.target,\n        });\n        return this.jitExpression(factoryRes.factory, angularCoreEnv, sourceMapUrl, factoryRes.statements);\n    }\n    createParseSourceSpan(kind, typeName, sourceUrl) {\n        return r3JitTypeSourceSpan(kind, typeName, sourceUrl);\n    }\n    /**\n     * JIT compiles an expression and returns the result of executing that expression.\n     *\n     * @param def the definition which will be compiled and executed to get the value to patch\n     * @param context an object map of @angular/core symbol names to symbols which will be available\n     * in the context of the compiled expression\n     * @param sourceUrl a URL to use for the source map of the compiled expression\n     * @param preStatements a collection of statements that should be evaluated before the expression.\n     */\n    jitExpression(def, context, sourceUrl, preStatements) {\n        // The ConstantPool may contain Statements which declare variables used in the final expression.\n        // Therefore, its statements need to precede the actual JIT operation. The final statement is a\n        // declaration of $def which is set to the expression being compiled.\n        const statements = [\n            ...preStatements,\n            new DeclareVarStmt('$def', def, undefined, [StmtModifier.Exported]),\n        ];\n        const res = this.jitEvaluator.evaluateStatements(sourceUrl, statements, new R3JitReflector(context), /* enableSourceMaps */ true);\n        return res['$def'];\n    }\n}\nconst USE_CLASS = Object.keys({ useClass: null })[0];\nconst USE_FACTORY = Object.keys({ useFactory: null })[0];\nconst USE_VALUE = Object.keys({ useValue: null })[0];\nconst USE_EXISTING = Object.keys({ useExisting: null })[0];\nconst wrapReference$1 = function (value) {\n    const wrapped = new WrappedNodeExpr(value);\n    return { value: wrapped, type: wrapped };\n};\nfunction convertToR3QueryMetadata(facade) {\n    return Object.assign(Object.assign({}, facade), { predicate: Array.isArray(facade.predicate) ? facade.predicate :\n            new WrappedNodeExpr(facade.predicate), read: facade.read ? new WrappedNodeExpr(facade.read) : null, static: facade.static });\n}\nfunction convertDirectiveFacadeToMetadata(facade) {\n    const inputsFromMetadata = parseInputOutputs(facade.inputs || []);\n    const outputsFromMetadata = parseInputOutputs(facade.outputs || []);\n    const propMetadata = facade.propMetadata;\n    const inputsFromType = {};\n    const outputsFromType = {};\n    for (const field in propMetadata) {\n        if (propMetadata.hasOwnProperty(field)) {\n            propMetadata[field].forEach(ann => {\n                if (isInput(ann)) {\n                    inputsFromType[field] =\n                        ann.bindingPropertyName ? [ann.bindingPropertyName, field] : field;\n                }\n                else if (isOutput(ann)) {\n                    outputsFromType[field] = ann.bindingPropertyName || field;\n                }\n            });\n        }\n    }\n    return Object.assign(Object.assign({}, facade), { typeSourceSpan: facade.typeSourceSpan, type: wrapReference$1(facade.type), internalType: new WrappedNodeExpr(facade.type), deps: convertR3DependencyMetadataArray(facade.deps), host: extractHostBindings(facade.propMetadata, facade.typeSourceSpan, facade.host), inputs: Object.assign(Object.assign({}, inputsFromMetadata), inputsFromType), outputs: Object.assign(Object.assign({}, outputsFromMetadata), outputsFromType), queries: facade.queries.map(convertToR3QueryMetadata), providers: facade.providers != null ? new WrappedNodeExpr(facade.providers) : null, viewQueries: facade.viewQueries.map(convertToR3QueryMetadata), fullInheritance: false });\n}\nfunction wrapExpression(obj, property) {\n    if (obj.hasOwnProperty(property)) {\n        return new WrappedNodeExpr(obj[property]);\n    }\n    else {\n        return undefined;\n    }\n}\nfunction computeProvidedIn(providedIn) {\n    if (providedIn == null || typeof providedIn === 'string') {\n        return new LiteralExpr(providedIn);\n    }\n    else {\n        return new WrappedNodeExpr(providedIn);\n    }\n}\nfunction convertR3DependencyMetadata(facade) {\n    let tokenExpr;\n    if (facade.token === null) {\n        tokenExpr = new LiteralExpr(null);\n    }\n    else if (facade.resolved === R3ResolvedDependencyType.Attribute) {\n        tokenExpr = new LiteralExpr(facade.token);\n    }\n    else {\n        tokenExpr = new WrappedNodeExpr(facade.token);\n    }\n    return {\n        token: tokenExpr,\n        attribute: null,\n        resolved: facade.resolved,\n        host: facade.host,\n        optional: facade.optional,\n        self: facade.self,\n        skipSelf: facade.skipSelf,\n    };\n}\nfunction convertR3DependencyMetadataArray(facades) {\n    return facades == null ? null : facades.map(convertR3DependencyMetadata);\n}\nfunction extractHostBindings(propMetadata, sourceSpan, host) {\n    // First parse the declarations from the metadata.\n    const bindings = parseHostBindings(host || {});\n    // After that check host bindings for errors\n    const errors = verifyHostBindings(bindings, sourceSpan);\n    if (errors.length) {\n        throw new Error(errors.map((error) => error.msg).join('\\n'));\n    }\n    // Next, loop over the properties of the object, looking for @HostBinding and @HostListener.\n    for (const field in propMetadata) {\n        if (propMetadata.hasOwnProperty(field)) {\n            propMetadata[field].forEach(ann => {\n                if (isHostBinding(ann)) {\n                    bindings.properties[ann.hostPropertyName || field] = field;\n                }\n                else if (isHostListener(ann)) {\n                    bindings.listeners[ann.eventName || field] = `${field}(${(ann.args || []).join(',')})`;\n                }\n            });\n        }\n    }\n    return bindings;\n}\nfunction isHostBinding(value) {\n    return value.ngMetadataName === 'HostBinding';\n}\nfunction isHostListener(value) {\n    return value.ngMetadataName === 'HostListener';\n}\nfunction isInput(value) {\n    return value.ngMetadataName === 'Input';\n}\nfunction isOutput(value) {\n    return value.ngMetadataName === 'Output';\n}\nfunction parseInputOutputs(values) {\n    return values.reduce((map, value) => {\n        const [field, property] = value.split(',').map(piece => piece.trim());\n        map[field] = property || field;\n        return map;\n    }, {});\n}\nfunction publishFacade(global) {\n    const ng = global.ng || (global.ng = {});\n    ng.ɵcompilerFacade = new CompilerFacadeImpl();\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst VERSION$1 = new Version('10.1.3');\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass CompilerConfig {\n    constructor({ defaultEncapsulation = ViewEncapsulation.Emulated, useJit = true, jitDevMode = false, missingTranslation = null, preserveWhitespaces, strictInjectionParameters } = {}) {\n        this.defaultEncapsulation = defaultEncapsulation;\n        this.useJit = !!useJit;\n        this.jitDevMode = !!jitDevMode;\n        this.missingTranslation = missingTranslation;\n        this.preserveWhitespaces = preserveWhitespacesDefault(noUndefined(preserveWhitespaces));\n        this.strictInjectionParameters = strictInjectionParameters === true;\n    }\n}\nfunction preserveWhitespacesDefault(preserveWhitespacesOption, defaultSetting = false) {\n    return preserveWhitespacesOption === null ? defaultSetting : preserveWhitespacesOption;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass DirectiveNormalizer {\n    constructor(_resourceLoader, _urlResolver, _htmlParser, _config) {\n        this._resourceLoader = _resourceLoader;\n        this._urlResolver = _urlResolver;\n        this._htmlParser = _htmlParser;\n        this._config = _config;\n        this._resourceLoaderCache = new Map();\n    }\n    clearCache() {\n        this._resourceLoaderCache.clear();\n    }\n    clearCacheFor(normalizedDirective) {\n        if (!normalizedDirective.isComponent) {\n            return;\n        }\n        const template = normalizedDirective.template;\n        this._resourceLoaderCache.delete(template.templateUrl);\n        template.externalStylesheets.forEach((stylesheet) => {\n            this._resourceLoaderCache.delete(stylesheet.moduleUrl);\n        });\n    }\n    _fetch(url) {\n        let result = this._resourceLoaderCache.get(url);\n        if (!result) {\n            result = this._resourceLoader.get(url);\n            this._resourceLoaderCache.set(url, result);\n        }\n        return result;\n    }\n    normalizeTemplate(prenormData) {\n        if (isDefined(prenormData.template)) {\n            if (isDefined(prenormData.templateUrl)) {\n                throw syntaxError(`'${stringify(prenormData\n                    .componentType)}' component cannot define both template and templateUrl`);\n            }\n            if (typeof prenormData.template !== 'string') {\n                throw syntaxError(`The template specified for component ${stringify(prenormData.componentType)} is not a string`);\n            }\n        }\n        else if (isDefined(prenormData.templateUrl)) {\n            if (typeof prenormData.templateUrl !== 'string') {\n                throw syntaxError(`The templateUrl specified for component ${stringify(prenormData.componentType)} is not a string`);\n            }\n        }\n        else {\n            throw syntaxError(`No template specified for component ${stringify(prenormData.componentType)}`);\n        }\n        if (isDefined(prenormData.preserveWhitespaces) &&\n            typeof prenormData.preserveWhitespaces !== 'boolean') {\n            throw syntaxError(`The preserveWhitespaces option for component ${stringify(prenormData.componentType)} must be a boolean`);\n        }\n        return SyncAsync.then(this._preParseTemplate(prenormData), (preparsedTemplate) => this._normalizeTemplateMetadata(prenormData, preparsedTemplate));\n    }\n    _preParseTemplate(prenomData) {\n        let template;\n        let templateUrl;\n        if (prenomData.template != null) {\n            template = prenomData.template;\n            templateUrl = prenomData.moduleUrl;\n        }\n        else {\n            templateUrl = this._urlResolver.resolve(prenomData.moduleUrl, prenomData.templateUrl);\n            template = this._fetch(templateUrl);\n        }\n        return SyncAsync.then(template, (template) => this._preparseLoadedTemplate(prenomData, template, templateUrl));\n    }\n    _preparseLoadedTemplate(prenormData, template, templateAbsUrl) {\n        const isInline = !!prenormData.template;\n        const interpolationConfig = InterpolationConfig.fromArray(prenormData.interpolation);\n        const templateUrl = templateSourceUrl({ reference: prenormData.ngModuleType }, { type: { reference: prenormData.componentType } }, { isInline, templateUrl: templateAbsUrl });\n        const rootNodesAndErrors = this._htmlParser.parse(template, templateUrl, { tokenizeExpansionForms: true, interpolationConfig });\n        if (rootNodesAndErrors.errors.length > 0) {\n            const errorString = rootNodesAndErrors.errors.join('\\n');\n            throw syntaxError(`Template parse errors:\\n${errorString}`);\n        }\n        const templateMetadataStyles = this._normalizeStylesheet(new CompileStylesheetMetadata({ styles: prenormData.styles, moduleUrl: prenormData.moduleUrl }));\n        const visitor = new TemplatePreparseVisitor();\n        visitAll$1(visitor, rootNodesAndErrors.rootNodes);\n        const templateStyles = this._normalizeStylesheet(new CompileStylesheetMetadata({ styles: visitor.styles, styleUrls: visitor.styleUrls, moduleUrl: templateAbsUrl }));\n        const styles = templateMetadataStyles.styles.concat(templateStyles.styles);\n        const inlineStyleUrls = templateMetadataStyles.styleUrls.concat(templateStyles.styleUrls);\n        const styleUrls = this\n            ._normalizeStylesheet(new CompileStylesheetMetadata({ styleUrls: prenormData.styleUrls, moduleUrl: prenormData.moduleUrl }))\n            .styleUrls;\n        return {\n            template,\n            templateUrl: templateAbsUrl,\n            isInline,\n            htmlAst: rootNodesAndErrors,\n            styles,\n            inlineStyleUrls,\n            styleUrls,\n            ngContentSelectors: visitor.ngContentSelectors,\n        };\n    }\n    _normalizeTemplateMetadata(prenormData, preparsedTemplate) {\n        return SyncAsync.then(this._loadMissingExternalStylesheets(preparsedTemplate.styleUrls.concat(preparsedTemplate.inlineStyleUrls)), (externalStylesheets) => this._normalizeLoadedTemplateMetadata(prenormData, preparsedTemplate, externalStylesheets));\n    }\n    _normalizeLoadedTemplateMetadata(prenormData, preparsedTemplate, stylesheets) {\n        // Algorithm:\n        // - produce exactly 1 entry per original styleUrl in\n        // CompileTemplateMetadata.externalStylesheets with all styles inlined\n        // - inline all styles that are referenced by the template into CompileTemplateMetadata.styles.\n        // Reason: be able to determine how many stylesheets there are even without loading\n        // the template nor the stylesheets, so we can create a stub for TypeScript always synchronously\n        // (as resource loading may be async)\n        const styles = [...preparsedTemplate.styles];\n        this._inlineStyles(preparsedTemplate.inlineStyleUrls, stylesheets, styles);\n        const styleUrls = preparsedTemplate.styleUrls;\n        const externalStylesheets = styleUrls.map(styleUrl => {\n            const stylesheet = stylesheets.get(styleUrl);\n            const styles = [...stylesheet.styles];\n            this._inlineStyles(stylesheet.styleUrls, stylesheets, styles);\n            return new CompileStylesheetMetadata({ moduleUrl: styleUrl, styles: styles });\n        });\n        let encapsulation = prenormData.encapsulation;\n        if (encapsulation == null) {\n            encapsulation = this._config.defaultEncapsulation;\n        }\n        if (encapsulation === ViewEncapsulation.Emulated && styles.length === 0 &&\n            styleUrls.length === 0) {\n            encapsulation = ViewEncapsulation.None;\n        }\n        return new CompileTemplateMetadata({\n            encapsulation,\n            template: preparsedTemplate.template,\n            templateUrl: preparsedTemplate.templateUrl,\n            htmlAst: preparsedTemplate.htmlAst,\n            styles,\n            styleUrls,\n            ngContentSelectors: preparsedTemplate.ngContentSelectors,\n            animations: prenormData.animations,\n            interpolation: prenormData.interpolation,\n            isInline: preparsedTemplate.isInline,\n            externalStylesheets,\n            preserveWhitespaces: preserveWhitespacesDefault(prenormData.preserveWhitespaces, this._config.preserveWhitespaces),\n        });\n    }\n    _inlineStyles(styleUrls, stylesheets, targetStyles) {\n        styleUrls.forEach(styleUrl => {\n            const stylesheet = stylesheets.get(styleUrl);\n            stylesheet.styles.forEach(style => targetStyles.push(style));\n            this._inlineStyles(stylesheet.styleUrls, stylesheets, targetStyles);\n        });\n    }\n    _loadMissingExternalStylesheets(styleUrls, loadedStylesheets = new Map()) {\n        return SyncAsync.then(SyncAsync.all(styleUrls.filter((styleUrl) => !loadedStylesheets.has(styleUrl))\n            .map(styleUrl => SyncAsync.then(this._fetch(styleUrl), (loadedStyle) => {\n            const stylesheet = this._normalizeStylesheet(new CompileStylesheetMetadata({ styles: [loadedStyle], moduleUrl: styleUrl }));\n            loadedStylesheets.set(styleUrl, stylesheet);\n            return this._loadMissingExternalStylesheets(stylesheet.styleUrls, loadedStylesheets);\n        }))), (_) => loadedStylesheets);\n    }\n    _normalizeStylesheet(stylesheet) {\n        const moduleUrl = stylesheet.moduleUrl;\n        const allStyleUrls = stylesheet.styleUrls.filter(isStyleUrlResolvable)\n            .map(url => this._urlResolver.resolve(moduleUrl, url));\n        const allStyles = stylesheet.styles.map(style => {\n            const styleWithImports = extractStyleUrls(this._urlResolver, moduleUrl, style);\n            allStyleUrls.push(...styleWithImports.styleUrls);\n            return styleWithImports.style;\n        });\n        return new CompileStylesheetMetadata({ styles: allStyles, styleUrls: allStyleUrls, moduleUrl: moduleUrl });\n    }\n}\nclass TemplatePreparseVisitor {\n    constructor() {\n        this.ngContentSelectors = [];\n        this.styles = [];\n        this.styleUrls = [];\n        this.ngNonBindableStackCount = 0;\n    }\n    visitElement(ast, context) {\n        const preparsedElement = preparseElement(ast);\n        switch (preparsedElement.type) {\n            case PreparsedElementType.NG_CONTENT:\n                if (this.ngNonBindableStackCount === 0) {\n                    this.ngContentSelectors.push(preparsedElement.selectAttr);\n                }\n                break;\n            case PreparsedElementType.STYLE:\n                let textContent = '';\n                ast.children.forEach(child => {\n                    if (child instanceof Text$3) {\n                        textContent += child.value;\n                    }\n                });\n                this.styles.push(textContent);\n                break;\n            case PreparsedElementType.STYLESHEET:\n                this.styleUrls.push(preparsedElement.hrefAttr);\n                break;\n            default:\n                break;\n        }\n        if (preparsedElement.nonBindable) {\n            this.ngNonBindableStackCount++;\n        }\n        visitAll$1(this, ast.children);\n        if (preparsedElement.nonBindable) {\n            this.ngNonBindableStackCount--;\n        }\n        return null;\n    }\n    visitExpansion(ast, context) {\n        visitAll$1(this, ast.cases);\n    }\n    visitExpansionCase(ast, context) {\n        visitAll$1(this, ast.expression);\n    }\n    visitComment(ast, context) {\n        return null;\n    }\n    visitAttribute(ast, context) {\n        return null;\n    }\n    visitText(ast, context) {\n        return null;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst QUERY_METADATA_IDENTIFIERS = [\n    createViewChild,\n    createViewChildren,\n    createContentChild,\n    createContentChildren,\n];\n/*\n * Resolve a `Type` for {@link Directive}.\n *\n * This interface can be overridden by the application developer to create custom behavior.\n *\n * See {@link Compiler}\n */\nclass DirectiveResolver {\n    constructor(_reflector) {\n        this._reflector = _reflector;\n    }\n    isDirective(type) {\n        const typeMetadata = this._reflector.annotations(resolveForwardRef(type));\n        return typeMetadata && typeMetadata.some(isDirectiveMetadata);\n    }\n    resolve(type, throwIfNotFound = true) {\n        const typeMetadata = this._reflector.annotations(resolveForwardRef(type));\n        if (typeMetadata) {\n            const metadata = findLast(typeMetadata, isDirectiveMetadata);\n            if (metadata) {\n                const propertyMetadata = this._reflector.propMetadata(type);\n                const guards = this._reflector.guards(type);\n                return this._mergeWithPropertyMetadata(metadata, propertyMetadata, guards, type);\n            }\n        }\n        if (throwIfNotFound) {\n            throw new Error(`No Directive annotation found on ${stringify(type)}`);\n        }\n        return null;\n    }\n    _mergeWithPropertyMetadata(dm, propertyMetadata, guards, directiveType) {\n        const inputs = [];\n        const outputs = [];\n        const host = {};\n        const queries = {};\n        Object.keys(propertyMetadata).forEach((propName) => {\n            const input = findLast(propertyMetadata[propName], (a) => createInput.isTypeOf(a));\n            if (input) {\n                if (input.bindingPropertyName) {\n                    inputs.push(`${propName}: ${input.bindingPropertyName}`);\n                }\n                else {\n                    inputs.push(propName);\n                }\n            }\n            const output = findLast(propertyMetadata[propName], (a) => createOutput.isTypeOf(a));\n            if (output) {\n                if (output.bindingPropertyName) {\n                    outputs.push(`${propName}: ${output.bindingPropertyName}`);\n                }\n                else {\n                    outputs.push(propName);\n                }\n            }\n            const hostBindings = propertyMetadata[propName].filter(a => createHostBinding.isTypeOf(a));\n            hostBindings.forEach(hostBinding => {\n                if (hostBinding.hostPropertyName) {\n                    const startWith = hostBinding.hostPropertyName[0];\n                    if (startWith === '(') {\n                        throw new Error(`@HostBinding can not bind to events. Use @HostListener instead.`);\n                    }\n                    else if (startWith === '[') {\n                        throw new Error(`@HostBinding parameter should be a property name, 'class.<name>', or 'attr.<name>'.`);\n                    }\n                    host[`[${hostBinding.hostPropertyName}]`] = propName;\n                }\n                else {\n                    host[`[${propName}]`] = propName;\n                }\n            });\n            const hostListeners = propertyMetadata[propName].filter(a => createHostListener.isTypeOf(a));\n            hostListeners.forEach(hostListener => {\n                const args = hostListener.args || [];\n                host[`(${hostListener.eventName})`] = `${propName}(${args.join(',')})`;\n            });\n            const query = findLast(propertyMetadata[propName], (a) => QUERY_METADATA_IDENTIFIERS.some(i => i.isTypeOf(a)));\n            if (query) {\n                queries[propName] = query;\n            }\n        });\n        return this._merge(dm, inputs, outputs, host, queries, guards, directiveType);\n    }\n    _extractPublicName(def) {\n        return splitAtColon(def, [null, def])[1].trim();\n    }\n    _dedupeBindings(bindings) {\n        const names = new Set();\n        const publicNames = new Set();\n        const reversedResult = [];\n        // go last to first to allow later entries to overwrite previous entries\n        for (let i = bindings.length - 1; i >= 0; i--) {\n            const binding = bindings[i];\n            const name = this._extractPublicName(binding);\n            publicNames.add(name);\n            if (!names.has(name)) {\n                names.add(name);\n                reversedResult.push(binding);\n            }\n        }\n        return reversedResult.reverse();\n    }\n    _merge(directive, inputs, outputs, host, queries, guards, directiveType) {\n        const mergedInputs = this._dedupeBindings(directive.inputs ? directive.inputs.concat(inputs) : inputs);\n        const mergedOutputs = this._dedupeBindings(directive.outputs ? directive.outputs.concat(outputs) : outputs);\n        const mergedHost = directive.host ? Object.assign(Object.assign({}, directive.host), host) : host;\n        const mergedQueries = directive.queries ? Object.assign(Object.assign({}, directive.queries), queries) : queries;\n        if (createComponent.isTypeOf(directive)) {\n            const comp = directive;\n            return createComponent({\n                selector: comp.selector,\n                inputs: mergedInputs,\n                outputs: mergedOutputs,\n                host: mergedHost,\n                exportAs: comp.exportAs,\n                moduleId: comp.moduleId,\n                queries: mergedQueries,\n                changeDetection: comp.changeDetection,\n                providers: comp.providers,\n                viewProviders: comp.viewProviders,\n                entryComponents: comp.entryComponents,\n                template: comp.template,\n                templateUrl: comp.templateUrl,\n                styles: comp.styles,\n                styleUrls: comp.styleUrls,\n                encapsulation: comp.encapsulation,\n                animations: comp.animations,\n                interpolation: comp.interpolation,\n                preserveWhitespaces: directive.preserveWhitespaces,\n            });\n        }\n        else {\n            return createDirective({\n                selector: directive.selector,\n                inputs: mergedInputs,\n                outputs: mergedOutputs,\n                host: mergedHost,\n                exportAs: directive.exportAs,\n                queries: mergedQueries,\n                providers: directive.providers,\n                guards\n            });\n        }\n    }\n}\nfunction isDirectiveMetadata(type) {\n    return createDirective.isTypeOf(type) || createComponent.isTypeOf(type);\n}\nfunction findLast(arr, condition) {\n    for (let i = arr.length - 1; i >= 0; i--) {\n        if (condition(arr[i])) {\n            return arr[i];\n        }\n    }\n    return null;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * An i18n error.\n */\nclass I18nError extends ParseError {\n    constructor(span, msg) {\n        super(span, msg);\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst _I18N_ATTR = 'i18n';\nconst _I18N_ATTR_PREFIX = 'i18n-';\nconst _I18N_COMMENT_PREFIX_REGEXP = /^i18n:?/;\nconst MEANING_SEPARATOR = '|';\nconst ID_SEPARATOR = '@@';\nlet i18nCommentsWarned = false;\n/**\n * Extract translatable messages from an html AST\n */\nfunction extractMessages(nodes, interpolationConfig, implicitTags, implicitAttrs) {\n    const visitor = new _Visitor$2(implicitTags, implicitAttrs);\n    return visitor.extract(nodes, interpolationConfig);\n}\nfunction mergeTranslations(nodes, translations, interpolationConfig, implicitTags, implicitAttrs) {\n    const visitor = new _Visitor$2(implicitTags, implicitAttrs);\n    return visitor.merge(nodes, translations, interpolationConfig);\n}\nclass ExtractionResult {\n    constructor(messages, errors) {\n        this.messages = messages;\n        this.errors = errors;\n    }\n}\nvar _VisitorMode;\n(function (_VisitorMode) {\n    _VisitorMode[_VisitorMode[\"Extract\"] = 0] = \"Extract\";\n    _VisitorMode[_VisitorMode[\"Merge\"] = 1] = \"Merge\";\n})(_VisitorMode || (_VisitorMode = {}));\n/**\n * This Visitor is used:\n * 1. to extract all the translatable strings from an html AST (see `extract()`),\n * 2. to replace the translatable strings with the actual translations (see `merge()`)\n *\n * @internal\n */\nclass _Visitor$2 {\n    constructor(_implicitTags, _implicitAttrs) {\n        this._implicitTags = _implicitTags;\n        this._implicitAttrs = _implicitAttrs;\n    }\n    /**\n     * Extracts the messages from the tree\n     */\n    extract(nodes, interpolationConfig) {\n        this._init(_VisitorMode.Extract, interpolationConfig);\n        nodes.forEach(node => node.visit(this, null));\n        if (this._inI18nBlock) {\n            this._reportError(nodes[nodes.length - 1], 'Unclosed block');\n        }\n        return new ExtractionResult(this._messages, this._errors);\n    }\n    /**\n     * Returns a tree where all translatable nodes are translated\n     */\n    merge(nodes, translations, interpolationConfig) {\n        this._init(_VisitorMode.Merge, interpolationConfig);\n        this._translations = translations;\n        // Construct a single fake root element\n        const wrapper = new Element$1('wrapper', [], nodes, undefined, undefined, undefined);\n        const translatedNode = wrapper.visit(this, null);\n        if (this._inI18nBlock) {\n            this._reportError(nodes[nodes.length - 1], 'Unclosed block');\n        }\n        return new ParseTreeResult(translatedNode.children, this._errors);\n    }\n    visitExpansionCase(icuCase, context) {\n        // Parse cases for translatable html attributes\n        const expression = visitAll$1(this, icuCase.expression, context);\n        if (this._mode === _VisitorMode.Merge) {\n            return new ExpansionCase(icuCase.value, expression, icuCase.sourceSpan, icuCase.valueSourceSpan, icuCase.expSourceSpan);\n        }\n    }\n    visitExpansion(icu, context) {\n        this._mayBeAddBlockChildren(icu);\n        const wasInIcu = this._inIcu;\n        if (!this._inIcu) {\n            // nested ICU messages should not be extracted but top-level translated as a whole\n            if (this._isInTranslatableSection) {\n                this._addMessage([icu]);\n            }\n            this._inIcu = true;\n        }\n        const cases = visitAll$1(this, icu.cases, context);\n        if (this._mode === _VisitorMode.Merge) {\n            icu = new Expansion(icu.switchValue, icu.type, cases, icu.sourceSpan, icu.switchValueSourceSpan);\n        }\n        this._inIcu = wasInIcu;\n        return icu;\n    }\n    visitComment(comment, context) {\n        const isOpening = _isOpeningComment(comment);\n        if (isOpening && this._isInTranslatableSection) {\n            this._reportError(comment, 'Could not start a block inside a translatable section');\n            return;\n        }\n        const isClosing = _isClosingComment(comment);\n        if (isClosing && !this._inI18nBlock) {\n            this._reportError(comment, 'Trying to close an unopened block');\n            return;\n        }\n        if (!this._inI18nNode && !this._inIcu) {\n            if (!this._inI18nBlock) {\n                if (isOpening) {\n                    // deprecated from v5 you should use <ng-container i18n> instead of i18n comments\n                    if (!i18nCommentsWarned && console && console.warn) {\n                        i18nCommentsWarned = true;\n                        const details = comment.sourceSpan.details ? `, ${comment.sourceSpan.details}` : '';\n                        // TODO(ocombe): use a log service once there is a public one available\n                        console.warn(`I18n comments are deprecated, use an <ng-container> element instead (${comment.sourceSpan.start}${details})`);\n                    }\n                    this._inI18nBlock = true;\n                    this._blockStartDepth = this._depth;\n                    this._blockChildren = [];\n                    this._blockMeaningAndDesc =\n                        comment.value.replace(_I18N_COMMENT_PREFIX_REGEXP, '').trim();\n                    this._openTranslatableSection(comment);\n                }\n            }\n            else {\n                if (isClosing) {\n                    if (this._depth == this._blockStartDepth) {\n                        this._closeTranslatableSection(comment, this._blockChildren);\n                        this._inI18nBlock = false;\n                        const message = this._addMessage(this._blockChildren, this._blockMeaningAndDesc);\n                        // merge attributes in sections\n                        const nodes = this._translateMessage(comment, message);\n                        return visitAll$1(this, nodes);\n                    }\n                    else {\n                        this._reportError(comment, 'I18N blocks should not cross element boundaries');\n                        return;\n                    }\n                }\n            }\n        }\n    }\n    visitText(text, context) {\n        if (this._isInTranslatableSection) {\n            this._mayBeAddBlockChildren(text);\n        }\n        return text;\n    }\n    visitElement(el, context) {\n        this._mayBeAddBlockChildren(el);\n        this._depth++;\n        const wasInI18nNode = this._inI18nNode;\n        const wasInImplicitNode = this._inImplicitNode;\n        let childNodes = [];\n        let translatedChildNodes = undefined;\n        // Extract:\n        // - top level nodes with the (implicit) \"i18n\" attribute if not already in a section\n        // - ICU messages\n        const i18nAttr = _getI18nAttr(el);\n        const i18nMeta = i18nAttr ? i18nAttr.value : '';\n        const isImplicit = this._implicitTags.some(tag => el.name === tag) && !this._inIcu &&\n            !this._isInTranslatableSection;\n        const isTopLevelImplicit = !wasInImplicitNode && isImplicit;\n        this._inImplicitNode = wasInImplicitNode || isImplicit;\n        if (!this._isInTranslatableSection && !this._inIcu) {\n            if (i18nAttr || isTopLevelImplicit) {\n                this._inI18nNode = true;\n                const message = this._addMessage(el.children, i18nMeta);\n                translatedChildNodes = this._translateMessage(el, message);\n            }\n            if (this._mode == _VisitorMode.Extract) {\n                const isTranslatable = i18nAttr || isTopLevelImplicit;\n                if (isTranslatable)\n                    this._openTranslatableSection(el);\n                visitAll$1(this, el.children);\n                if (isTranslatable)\n                    this._closeTranslatableSection(el, el.children);\n            }\n        }\n        else {\n            if (i18nAttr || isTopLevelImplicit) {\n                this._reportError(el, 'Could not mark an element as translatable inside a translatable section');\n            }\n            if (this._mode == _VisitorMode.Extract) {\n                // Descend into child nodes for extraction\n                visitAll$1(this, el.children);\n            }\n        }\n        if (this._mode === _VisitorMode.Merge) {\n            const visitNodes = translatedChildNodes || el.children;\n            visitNodes.forEach(child => {\n                const visited = child.visit(this, context);\n                if (visited && !this._isInTranslatableSection) {\n                    // Do not add the children from translatable sections (= i18n blocks here)\n                    // They will be added later in this loop when the block closes (i.e. on `<!-- /i18n -->`)\n                    childNodes = childNodes.concat(visited);\n                }\n            });\n        }\n        this._visitAttributesOf(el);\n        this._depth--;\n        this._inI18nNode = wasInI18nNode;\n        this._inImplicitNode = wasInImplicitNode;\n        if (this._mode === _VisitorMode.Merge) {\n            const translatedAttrs = this._translateAttributes(el);\n            return new Element$1(el.name, translatedAttrs, childNodes, el.sourceSpan, el.startSourceSpan, el.endSourceSpan);\n        }\n        return null;\n    }\n    visitAttribute(attribute, context) {\n        throw new Error('unreachable code');\n    }\n    _init(mode, interpolationConfig) {\n        this._mode = mode;\n        this._inI18nBlock = false;\n        this._inI18nNode = false;\n        this._depth = 0;\n        this._inIcu = false;\n        this._msgCountAtSectionStart = undefined;\n        this._errors = [];\n        this._messages = [];\n        this._inImplicitNode = false;\n        this._createI18nMessage = createI18nMessageFactory(interpolationConfig);\n    }\n    // looks for translatable attributes\n    _visitAttributesOf(el) {\n        const explicitAttrNameToValue = {};\n        const implicitAttrNames = this._implicitAttrs[el.name] || [];\n        el.attrs.filter(attr => attr.name.startsWith(_I18N_ATTR_PREFIX))\n            .forEach(attr => explicitAttrNameToValue[attr.name.slice(_I18N_ATTR_PREFIX.length)] =\n            attr.value);\n        el.attrs.forEach(attr => {\n            if (attr.name in explicitAttrNameToValue) {\n                this._addMessage([attr], explicitAttrNameToValue[attr.name]);\n            }\n            else if (implicitAttrNames.some(name => attr.name === name)) {\n                this._addMessage([attr]);\n            }\n        });\n    }\n    // add a translatable message\n    _addMessage(ast, msgMeta) {\n        if (ast.length == 0 ||\n            ast.length == 1 && ast[0] instanceof Attribute && !ast[0].value) {\n            // Do not create empty messages\n            return null;\n        }\n        const { meaning, description, id } = _parseMessageMeta(msgMeta);\n        const message = this._createI18nMessage(ast, meaning, description, id);\n        this._messages.push(message);\n        return message;\n    }\n    // Translates the given message given the `TranslationBundle`\n    // This is used for translating elements / blocks - see `_translateAttributes` for attributes\n    // no-op when called in extraction mode (returns [])\n    _translateMessage(el, message) {\n        if (message && this._mode === _VisitorMode.Merge) {\n            const nodes = this._translations.get(message);\n            if (nodes) {\n                return nodes;\n            }\n            this._reportError(el, `Translation unavailable for message id=\"${this._translations.digest(message)}\"`);\n        }\n        return [];\n    }\n    // translate the attributes of an element and remove i18n specific attributes\n    _translateAttributes(el) {\n        const attributes = el.attrs;\n        const i18nParsedMessageMeta = {};\n        attributes.forEach(attr => {\n            if (attr.name.startsWith(_I18N_ATTR_PREFIX)) {\n                i18nParsedMessageMeta[attr.name.slice(_I18N_ATTR_PREFIX.length)] =\n                    _parseMessageMeta(attr.value);\n            }\n        });\n        const translatedAttributes = [];\n        attributes.forEach((attr) => {\n            if (attr.name === _I18N_ATTR || attr.name.startsWith(_I18N_ATTR_PREFIX)) {\n                // strip i18n specific attributes\n                return;\n            }\n            if (attr.value && attr.value != '' && i18nParsedMessageMeta.hasOwnProperty(attr.name)) {\n                const { meaning, description, id } = i18nParsedMessageMeta[attr.name];\n                const message = this._createI18nMessage([attr], meaning, description, id);\n                const nodes = this._translations.get(message);\n                if (nodes) {\n                    if (nodes.length == 0) {\n                        translatedAttributes.push(new Attribute(attr.name, '', attr.sourceSpan));\n                    }\n                    else if (nodes[0] instanceof Text$3) {\n                        const value = nodes[0].value;\n                        translatedAttributes.push(new Attribute(attr.name, value, attr.sourceSpan));\n                    }\n                    else {\n                        this._reportError(el, `Unexpected translation for attribute \"${attr.name}\" (id=\"${id || this._translations.digest(message)}\")`);\n                    }\n                }\n                else {\n                    this._reportError(el, `Translation unavailable for attribute \"${attr.name}\" (id=\"${id || this._translations.digest(message)}\")`);\n                }\n            }\n            else {\n                translatedAttributes.push(attr);\n            }\n        });\n        return translatedAttributes;\n    }\n    /**\n     * Add the node as a child of the block when:\n     * - we are in a block,\n     * - we are not inside a ICU message (those are handled separately),\n     * - the node is a \"direct child\" of the block\n     */\n    _mayBeAddBlockChildren(node) {\n        if (this._inI18nBlock && !this._inIcu && this._depth == this._blockStartDepth) {\n            this._blockChildren.push(node);\n        }\n    }\n    /**\n     * Marks the start of a section, see `_closeTranslatableSection`\n     */\n    _openTranslatableSection(node) {\n        if (this._isInTranslatableSection) {\n            this._reportError(node, 'Unexpected section start');\n        }\n        else {\n            this._msgCountAtSectionStart = this._messages.length;\n        }\n    }\n    /**\n     * A translatable section could be:\n     * - the content of translatable element,\n     * - nodes between `<!-- i18n -->` and `<!-- /i18n -->` comments\n     */\n    get _isInTranslatableSection() {\n        return this._msgCountAtSectionStart !== void 0;\n    }\n    /**\n     * Terminates a section.\n     *\n     * If a section has only one significant children (comments not significant) then we should not\n     * keep the message from this children:\n     *\n     * `<p i18n=\"meaning|description\">{ICU message}</p>` would produce two messages:\n     * - one for the <p> content with meaning and description,\n     * - another one for the ICU message.\n     *\n     * In this case the last message is discarded as it contains less information (the AST is\n     * otherwise identical).\n     *\n     * Note that we should still keep messages extracted from attributes inside the section (ie in the\n     * ICU message here)\n     */\n    _closeTranslatableSection(node, directChildren) {\n        if (!this._isInTranslatableSection) {\n            this._reportError(node, 'Unexpected section end');\n            return;\n        }\n        const startIndex = this._msgCountAtSectionStart;\n        const significantChildren = directChildren.reduce((count, node) => count + (node instanceof Comment ? 0 : 1), 0);\n        if (significantChildren == 1) {\n            for (let i = this._messages.length - 1; i >= startIndex; i--) {\n                const ast = this._messages[i].nodes;\n                if (!(ast.length == 1 && ast[0] instanceof Text$1)) {\n                    this._messages.splice(i, 1);\n                    break;\n                }\n            }\n        }\n        this._msgCountAtSectionStart = undefined;\n    }\n    _reportError(node, msg) {\n        this._errors.push(new I18nError(node.sourceSpan, msg));\n    }\n}\nfunction _isOpeningComment(n) {\n    return !!(n instanceof Comment && n.value && n.value.startsWith('i18n'));\n}\nfunction _isClosingComment(n) {\n    return !!(n instanceof Comment && n.value && n.value === '/i18n');\n}\nfunction _getI18nAttr(p) {\n    return p.attrs.find(attr => attr.name === _I18N_ATTR) || null;\n}\nfunction _parseMessageMeta(i18n) {\n    if (!i18n)\n        return { meaning: '', description: '', id: '' };\n    const idIndex = i18n.indexOf(ID_SEPARATOR);\n    const descIndex = i18n.indexOf(MEANING_SEPARATOR);\n    const [meaningAndDesc, id] = (idIndex > -1) ? [i18n.slice(0, idIndex), i18n.slice(idIndex + 2)] : [i18n, ''];\n    const [meaning, description] = (descIndex > -1) ?\n        [meaningAndDesc.slice(0, descIndex), meaningAndDesc.slice(descIndex + 1)] :\n        ['', meaningAndDesc];\n    return { meaning, description, id: id.trim() };\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass XmlTagDefinition {\n    constructor() {\n        this.closedByParent = false;\n        this.contentType = TagContentType.PARSABLE_DATA;\n        this.isVoid = false;\n        this.ignoreFirstLf = false;\n        this.canSelfClose = true;\n        this.preventNamespaceInheritance = false;\n    }\n    requireExtraParent(currentParent) {\n        return false;\n    }\n    isClosedByChild(name) {\n        return false;\n    }\n}\nconst _TAG_DEFINITION = new XmlTagDefinition();\nfunction getXmlTagDefinition(tagName) {\n    return _TAG_DEFINITION;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass XmlParser extends Parser {\n    constructor() {\n        super(getXmlTagDefinition);\n    }\n    parse(source, url, options) {\n        return super.parse(source, url, options);\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst _VERSION = '1.2';\nconst _XMLNS = 'urn:oasis:names:tc:xliff:document:1.2';\n// TODO(vicb): make this a param (s/_/-/)\nconst _DEFAULT_SOURCE_LANG = 'en';\nconst _PLACEHOLDER_TAG$1 = 'x';\nconst _MARKER_TAG = 'mrk';\nconst _FILE_TAG = 'file';\nconst _SOURCE_TAG$1 = 'source';\nconst _SEGMENT_SOURCE_TAG = 'seg-source';\nconst _ALT_TRANS_TAG = 'alt-trans';\nconst _TARGET_TAG = 'target';\nconst _UNIT_TAG = 'trans-unit';\nconst _CONTEXT_GROUP_TAG = 'context-group';\nconst _CONTEXT_TAG = 'context';\n// http://docs.oasis-open.org/xliff/v1.2/os/xliff-core.html\n// http://docs.oasis-open.org/xliff/v1.2/xliff-profile-html/xliff-profile-html-1.2.html\nclass Xliff extends Serializer {\n    write(messages, locale) {\n        const visitor = new _WriteVisitor();\n        const transUnits = [];\n        messages.forEach(message => {\n            let contextTags = [];\n            message.sources.forEach((source) => {\n                let contextGroupTag = new Tag(_CONTEXT_GROUP_TAG, { purpose: 'location' });\n                contextGroupTag.children.push(new CR(10), new Tag(_CONTEXT_TAG, { 'context-type': 'sourcefile' }, [new Text$2(source.filePath)]), new CR(10), new Tag(_CONTEXT_TAG, { 'context-type': 'linenumber' }, [new Text$2(`${source.startLine}`)]), new CR(8));\n                contextTags.push(new CR(8), contextGroupTag);\n            });\n            const transUnit = new Tag(_UNIT_TAG, { id: message.id, datatype: 'html' });\n            transUnit.children.push(new CR(8), new Tag(_SOURCE_TAG$1, {}, visitor.serialize(message.nodes)), ...contextTags);\n            if (message.description) {\n                transUnit.children.push(new CR(8), new Tag('note', { priority: '1', from: 'description' }, [new Text$2(message.description)]));\n            }\n            if (message.meaning) {\n                transUnit.children.push(new CR(8), new Tag('note', { priority: '1', from: 'meaning' }, [new Text$2(message.meaning)]));\n            }\n            transUnit.children.push(new CR(6));\n            transUnits.push(new CR(6), transUnit);\n        });\n        const body = new Tag('body', {}, [...transUnits, new CR(4)]);\n        const file = new Tag('file', {\n            'source-language': locale || _DEFAULT_SOURCE_LANG,\n            datatype: 'plaintext',\n            original: 'ng2.template',\n        }, [new CR(4), body, new CR(2)]);\n        const xliff = new Tag('xliff', { version: _VERSION, xmlns: _XMLNS }, [new CR(2), file, new CR()]);\n        return serialize([\n            new Declaration({ version: '1.0', encoding: 'UTF-8' }), new CR(), xliff, new CR()\n        ]);\n    }\n    load(content, url) {\n        // xliff to xml nodes\n        const xliffParser = new XliffParser();\n        const { locale, msgIdToHtml, errors } = xliffParser.parse(content, url);\n        // xml nodes to i18n nodes\n        const i18nNodesByMsgId = {};\n        const converter = new XmlToI18n();\n        Object.keys(msgIdToHtml).forEach(msgId => {\n            const { i18nNodes, errors: e } = converter.convert(msgIdToHtml[msgId], url);\n            errors.push(...e);\n            i18nNodesByMsgId[msgId] = i18nNodes;\n        });\n        if (errors.length) {\n            throw new Error(`xliff parse errors:\\n${errors.join('\\n')}`);\n        }\n        return { locale: locale, i18nNodesByMsgId };\n    }\n    digest(message) {\n        return digest(message);\n    }\n}\nclass _WriteVisitor {\n    visitText(text, context) {\n        return [new Text$2(text.value)];\n    }\n    visitContainer(container, context) {\n        const nodes = [];\n        container.children.forEach((node) => nodes.push(...node.visit(this)));\n        return nodes;\n    }\n    visitIcu(icu, context) {\n        const nodes = [new Text$2(`{${icu.expressionPlaceholder}, ${icu.type}, `)];\n        Object.keys(icu.cases).forEach((c) => {\n            nodes.push(new Text$2(`${c} {`), ...icu.cases[c].visit(this), new Text$2(`} `));\n        });\n        nodes.push(new Text$2(`}`));\n        return nodes;\n    }\n    visitTagPlaceholder(ph, context) {\n        const ctype = getCtypeForTag(ph.tag);\n        if (ph.isVoid) {\n            // void tags have no children nor closing tags\n            return [new Tag(_PLACEHOLDER_TAG$1, { id: ph.startName, ctype, 'equiv-text': `<${ph.tag}/>` })];\n        }\n        const startTagPh = new Tag(_PLACEHOLDER_TAG$1, { id: ph.startName, ctype, 'equiv-text': `<${ph.tag}>` });\n        const closeTagPh = new Tag(_PLACEHOLDER_TAG$1, { id: ph.closeName, ctype, 'equiv-text': `</${ph.tag}>` });\n        return [startTagPh, ...this.serialize(ph.children), closeTagPh];\n    }\n    visitPlaceholder(ph, context) {\n        return [new Tag(_PLACEHOLDER_TAG$1, { id: ph.name, 'equiv-text': `{{${ph.value}}}` })];\n    }\n    visitIcuPlaceholder(ph, context) {\n        const equivText = `{${ph.value.expression}, ${ph.value.type}, ${Object.keys(ph.value.cases).map((value) => value + ' {...}').join(' ')}}`;\n        return [new Tag(_PLACEHOLDER_TAG$1, { id: ph.name, 'equiv-text': equivText })];\n    }\n    serialize(nodes) {\n        return [].concat(...nodes.map(node => node.visit(this)));\n    }\n}\n// TODO(vicb): add error management (structure)\n// Extract messages as xml nodes from the xliff file\nclass XliffParser {\n    constructor() {\n        this._locale = null;\n    }\n    parse(xliff, url) {\n        this._unitMlString = null;\n        this._msgIdToHtml = {};\n        const xml = new XmlParser().parse(xliff, url);\n        this._errors = xml.errors;\n        visitAll$1(this, xml.rootNodes, null);\n        return {\n            msgIdToHtml: this._msgIdToHtml,\n            errors: this._errors,\n            locale: this._locale,\n        };\n    }\n    visitElement(element, context) {\n        switch (element.name) {\n            case _UNIT_TAG:\n                this._unitMlString = null;\n                const idAttr = element.attrs.find((attr) => attr.name === 'id');\n                if (!idAttr) {\n                    this._addError(element, `<${_UNIT_TAG}> misses the \"id\" attribute`);\n                }\n                else {\n                    const id = idAttr.value;\n                    if (this._msgIdToHtml.hasOwnProperty(id)) {\n                        this._addError(element, `Duplicated translations for msg ${id}`);\n                    }\n                    else {\n                        visitAll$1(this, element.children, null);\n                        if (typeof this._unitMlString === 'string') {\n                            this._msgIdToHtml[id] = this._unitMlString;\n                        }\n                        else {\n                            this._addError(element, `Message ${id} misses a translation`);\n                        }\n                    }\n                }\n                break;\n            // ignore those tags\n            case _SOURCE_TAG$1:\n            case _SEGMENT_SOURCE_TAG:\n            case _ALT_TRANS_TAG:\n                break;\n            case _TARGET_TAG:\n                const innerTextStart = element.startSourceSpan.end.offset;\n                const innerTextEnd = element.endSourceSpan.start.offset;\n                const content = element.startSourceSpan.start.file.content;\n                const innerText = content.slice(innerTextStart, innerTextEnd);\n                this._unitMlString = innerText;\n                break;\n            case _FILE_TAG:\n                const localeAttr = element.attrs.find((attr) => attr.name === 'target-language');\n                if (localeAttr) {\n                    this._locale = localeAttr.value;\n                }\n                visitAll$1(this, element.children, null);\n                break;\n            default:\n                // TODO(vicb): assert file structure, xliff version\n                // For now only recurse on unhandled nodes\n                visitAll$1(this, element.children, null);\n        }\n    }\n    visitAttribute(attribute, context) { }\n    visitText(text, context) { }\n    visitComment(comment, context) { }\n    visitExpansion(expansion, context) { }\n    visitExpansionCase(expansionCase, context) { }\n    _addError(node, message) {\n        this._errors.push(new I18nError(node.sourceSpan, message));\n    }\n}\n// Convert ml nodes (xliff syntax) to i18n nodes\nclass XmlToI18n {\n    convert(message, url) {\n        const xmlIcu = new XmlParser().parse(message, url, { tokenizeExpansionForms: true });\n        this._errors = xmlIcu.errors;\n        const i18nNodes = this._errors.length > 0 || xmlIcu.rootNodes.length == 0 ?\n            [] :\n            [].concat(...visitAll$1(this, xmlIcu.rootNodes));\n        return {\n            i18nNodes: i18nNodes,\n            errors: this._errors,\n        };\n    }\n    visitText(text, context) {\n        return new Text$1(text.value, text.sourceSpan);\n    }\n    visitElement(el, context) {\n        if (el.name === _PLACEHOLDER_TAG$1) {\n            const nameAttr = el.attrs.find((attr) => attr.name === 'id');\n            if (nameAttr) {\n                return new Placeholder('', nameAttr.value, el.sourceSpan);\n            }\n            this._addError(el, `<${_PLACEHOLDER_TAG$1}> misses the \"id\" attribute`);\n            return null;\n        }\n        if (el.name === _MARKER_TAG) {\n            return [].concat(...visitAll$1(this, el.children));\n        }\n        this._addError(el, `Unexpected tag`);\n        return null;\n    }\n    visitExpansion(icu, context) {\n        const caseMap = {};\n        visitAll$1(this, icu.cases).forEach((c) => {\n            caseMap[c.value] = new Container(c.nodes, icu.sourceSpan);\n        });\n        return new Icu$1(icu.switchValue, icu.type, caseMap, icu.sourceSpan);\n    }\n    visitExpansionCase(icuCase, context) {\n        return {\n            value: icuCase.value,\n            nodes: visitAll$1(this, icuCase.expression),\n        };\n    }\n    visitComment(comment, context) { }\n    visitAttribute(attribute, context) { }\n    _addError(node, message) {\n        this._errors.push(new I18nError(node.sourceSpan, message));\n    }\n}\nfunction getCtypeForTag(tag) {\n    switch (tag.toLowerCase()) {\n        case 'br':\n            return 'lb';\n        case 'img':\n            return 'image';\n        default:\n            return `x-${tag}`;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst _VERSION$1 = '2.0';\nconst _XMLNS$1 = 'urn:oasis:names:tc:xliff:document:2.0';\n// TODO(vicb): make this a param (s/_/-/)\nconst _DEFAULT_SOURCE_LANG$1 = 'en';\nconst _PLACEHOLDER_TAG$2 = 'ph';\nconst _PLACEHOLDER_SPANNING_TAG = 'pc';\nconst _MARKER_TAG$1 = 'mrk';\nconst _XLIFF_TAG = 'xliff';\nconst _SOURCE_TAG$2 = 'source';\nconst _TARGET_TAG$1 = 'target';\nconst _UNIT_TAG$1 = 'unit';\n// http://docs.oasis-open.org/xliff/xliff-core/v2.0/os/xliff-core-v2.0-os.html\nclass Xliff2 extends Serializer {\n    write(messages, locale) {\n        const visitor = new _WriteVisitor$1();\n        const units = [];\n        messages.forEach(message => {\n            const unit = new Tag(_UNIT_TAG$1, { id: message.id });\n            const notes = new Tag('notes');\n            if (message.description || message.meaning) {\n                if (message.description) {\n                    notes.children.push(new CR(8), new Tag('note', { category: 'description' }, [new Text$2(message.description)]));\n                }\n                if (message.meaning) {\n                    notes.children.push(new CR(8), new Tag('note', { category: 'meaning' }, [new Text$2(message.meaning)]));\n                }\n            }\n            message.sources.forEach((source) => {\n                notes.children.push(new CR(8), new Tag('note', { category: 'location' }, [\n                    new Text$2(`${source.filePath}:${source.startLine}${source.endLine !== source.startLine ? ',' + source.endLine : ''}`)\n                ]));\n            });\n            notes.children.push(new CR(6));\n            unit.children.push(new CR(6), notes);\n            const segment = new Tag('segment');\n            segment.children.push(new CR(8), new Tag(_SOURCE_TAG$2, {}, visitor.serialize(message.nodes)), new CR(6));\n            unit.children.push(new CR(6), segment, new CR(4));\n            units.push(new CR(4), unit);\n        });\n        const file = new Tag('file', { 'original': 'ng.template', id: 'ngi18n' }, [...units, new CR(2)]);\n        const xliff = new Tag(_XLIFF_TAG, { version: _VERSION$1, xmlns: _XMLNS$1, srcLang: locale || _DEFAULT_SOURCE_LANG$1 }, [new CR(2), file, new CR()]);\n        return serialize([\n            new Declaration({ version: '1.0', encoding: 'UTF-8' }), new CR(), xliff, new CR()\n        ]);\n    }\n    load(content, url) {\n        // xliff to xml nodes\n        const xliff2Parser = new Xliff2Parser();\n        const { locale, msgIdToHtml, errors } = xliff2Parser.parse(content, url);\n        // xml nodes to i18n nodes\n        const i18nNodesByMsgId = {};\n        const converter = new XmlToI18n$1();\n        Object.keys(msgIdToHtml).forEach(msgId => {\n            const { i18nNodes, errors: e } = converter.convert(msgIdToHtml[msgId], url);\n            errors.push(...e);\n            i18nNodesByMsgId[msgId] = i18nNodes;\n        });\n        if (errors.length) {\n            throw new Error(`xliff2 parse errors:\\n${errors.join('\\n')}`);\n        }\n        return { locale: locale, i18nNodesByMsgId };\n    }\n    digest(message) {\n        return decimalDigest(message);\n    }\n}\nclass _WriteVisitor$1 {\n    visitText(text, context) {\n        return [new Text$2(text.value)];\n    }\n    visitContainer(container, context) {\n        const nodes = [];\n        container.children.forEach((node) => nodes.push(...node.visit(this)));\n        return nodes;\n    }\n    visitIcu(icu, context) {\n        const nodes = [new Text$2(`{${icu.expressionPlaceholder}, ${icu.type}, `)];\n        Object.keys(icu.cases).forEach((c) => {\n            nodes.push(new Text$2(`${c} {`), ...icu.cases[c].visit(this), new Text$2(`} `));\n        });\n        nodes.push(new Text$2(`}`));\n        return nodes;\n    }\n    visitTagPlaceholder(ph, context) {\n        const type = getTypeForTag(ph.tag);\n        if (ph.isVoid) {\n            const tagPh = new Tag(_PLACEHOLDER_TAG$2, {\n                id: (this._nextPlaceholderId++).toString(),\n                equiv: ph.startName,\n                type: type,\n                disp: `<${ph.tag}/>`,\n            });\n            return [tagPh];\n        }\n        const tagPc = new Tag(_PLACEHOLDER_SPANNING_TAG, {\n            id: (this._nextPlaceholderId++).toString(),\n            equivStart: ph.startName,\n            equivEnd: ph.closeName,\n            type: type,\n            dispStart: `<${ph.tag}>`,\n            dispEnd: `</${ph.tag}>`,\n        });\n        const nodes = [].concat(...ph.children.map(node => node.visit(this)));\n        if (nodes.length) {\n            nodes.forEach((node) => tagPc.children.push(node));\n        }\n        else {\n            tagPc.children.push(new Text$2(''));\n        }\n        return [tagPc];\n    }\n    visitPlaceholder(ph, context) {\n        const idStr = (this._nextPlaceholderId++).toString();\n        return [new Tag(_PLACEHOLDER_TAG$2, {\n                id: idStr,\n                equiv: ph.name,\n                disp: `{{${ph.value}}}`,\n            })];\n    }\n    visitIcuPlaceholder(ph, context) {\n        const cases = Object.keys(ph.value.cases).map((value) => value + ' {...}').join(' ');\n        const idStr = (this._nextPlaceholderId++).toString();\n        return [new Tag(_PLACEHOLDER_TAG$2, { id: idStr, equiv: ph.name, disp: `{${ph.value.expression}, ${ph.value.type}, ${cases}}` })];\n    }\n    serialize(nodes) {\n        this._nextPlaceholderId = 0;\n        return [].concat(...nodes.map(node => node.visit(this)));\n    }\n}\n// Extract messages as xml nodes from the xliff file\nclass Xliff2Parser {\n    constructor() {\n        this._locale = null;\n    }\n    parse(xliff, url) {\n        this._unitMlString = null;\n        this._msgIdToHtml = {};\n        const xml = new XmlParser().parse(xliff, url);\n        this._errors = xml.errors;\n        visitAll$1(this, xml.rootNodes, null);\n        return {\n            msgIdToHtml: this._msgIdToHtml,\n            errors: this._errors,\n            locale: this._locale,\n        };\n    }\n    visitElement(element, context) {\n        switch (element.name) {\n            case _UNIT_TAG$1:\n                this._unitMlString = null;\n                const idAttr = element.attrs.find((attr) => attr.name === 'id');\n                if (!idAttr) {\n                    this._addError(element, `<${_UNIT_TAG$1}> misses the \"id\" attribute`);\n                }\n                else {\n                    const id = idAttr.value;\n                    if (this._msgIdToHtml.hasOwnProperty(id)) {\n                        this._addError(element, `Duplicated translations for msg ${id}`);\n                    }\n                    else {\n                        visitAll$1(this, element.children, null);\n                        if (typeof this._unitMlString === 'string') {\n                            this._msgIdToHtml[id] = this._unitMlString;\n                        }\n                        else {\n                            this._addError(element, `Message ${id} misses a translation`);\n                        }\n                    }\n                }\n                break;\n            case _SOURCE_TAG$2:\n                // ignore source message\n                break;\n            case _TARGET_TAG$1:\n                const innerTextStart = element.startSourceSpan.end.offset;\n                const innerTextEnd = element.endSourceSpan.start.offset;\n                const content = element.startSourceSpan.start.file.content;\n                const innerText = content.slice(innerTextStart, innerTextEnd);\n                this._unitMlString = innerText;\n                break;\n            case _XLIFF_TAG:\n                const localeAttr = element.attrs.find((attr) => attr.name === 'trgLang');\n                if (localeAttr) {\n                    this._locale = localeAttr.value;\n                }\n                const versionAttr = element.attrs.find((attr) => attr.name === 'version');\n                if (versionAttr) {\n                    const version = versionAttr.value;\n                    if (version !== '2.0') {\n                        this._addError(element, `The XLIFF file version ${version} is not compatible with XLIFF 2.0 serializer`);\n                    }\n                    else {\n                        visitAll$1(this, element.children, null);\n                    }\n                }\n                break;\n            default:\n                visitAll$1(this, element.children, null);\n        }\n    }\n    visitAttribute(attribute, context) { }\n    visitText(text, context) { }\n    visitComment(comment, context) { }\n    visitExpansion(expansion, context) { }\n    visitExpansionCase(expansionCase, context) { }\n    _addError(node, message) {\n        this._errors.push(new I18nError(node.sourceSpan, message));\n    }\n}\n// Convert ml nodes (xliff syntax) to i18n nodes\nclass XmlToI18n$1 {\n    convert(message, url) {\n        const xmlIcu = new XmlParser().parse(message, url, { tokenizeExpansionForms: true });\n        this._errors = xmlIcu.errors;\n        const i18nNodes = this._errors.length > 0 || xmlIcu.rootNodes.length == 0 ?\n            [] :\n            [].concat(...visitAll$1(this, xmlIcu.rootNodes));\n        return {\n            i18nNodes,\n            errors: this._errors,\n        };\n    }\n    visitText(text, context) {\n        return new Text$1(text.value, text.sourceSpan);\n    }\n    visitElement(el, context) {\n        switch (el.name) {\n            case _PLACEHOLDER_TAG$2:\n                const nameAttr = el.attrs.find((attr) => attr.name === 'equiv');\n                if (nameAttr) {\n                    return [new Placeholder('', nameAttr.value, el.sourceSpan)];\n                }\n                this._addError(el, `<${_PLACEHOLDER_TAG$2}> misses the \"equiv\" attribute`);\n                break;\n            case _PLACEHOLDER_SPANNING_TAG:\n                const startAttr = el.attrs.find((attr) => attr.name === 'equivStart');\n                const endAttr = el.attrs.find((attr) => attr.name === 'equivEnd');\n                if (!startAttr) {\n                    this._addError(el, `<${_PLACEHOLDER_TAG$2}> misses the \"equivStart\" attribute`);\n                }\n                else if (!endAttr) {\n                    this._addError(el, `<${_PLACEHOLDER_TAG$2}> misses the \"equivEnd\" attribute`);\n                }\n                else {\n                    const startId = startAttr.value;\n                    const endId = endAttr.value;\n                    const nodes = [];\n                    return nodes.concat(new Placeholder('', startId, el.sourceSpan), ...el.children.map(node => node.visit(this, null)), new Placeholder('', endId, el.sourceSpan));\n                }\n                break;\n            case _MARKER_TAG$1:\n                return [].concat(...visitAll$1(this, el.children));\n            default:\n                this._addError(el, `Unexpected tag`);\n        }\n        return null;\n    }\n    visitExpansion(icu, context) {\n        const caseMap = {};\n        visitAll$1(this, icu.cases).forEach((c) => {\n            caseMap[c.value] = new Container(c.nodes, icu.sourceSpan);\n        });\n        return new Icu$1(icu.switchValue, icu.type, caseMap, icu.sourceSpan);\n    }\n    visitExpansionCase(icuCase, context) {\n        return {\n            value: icuCase.value,\n            nodes: [].concat(...visitAll$1(this, icuCase.expression)),\n        };\n    }\n    visitComment(comment, context) { }\n    visitAttribute(attribute, context) { }\n    _addError(node, message) {\n        this._errors.push(new I18nError(node.sourceSpan, message));\n    }\n}\nfunction getTypeForTag(tag) {\n    switch (tag.toLowerCase()) {\n        case 'br':\n        case 'b':\n        case 'i':\n        case 'u':\n            return 'fmt';\n        case 'img':\n            return 'image';\n        case 'a':\n            return 'link';\n        default:\n            return 'other';\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst _TRANSLATIONS_TAG = 'translationbundle';\nconst _TRANSLATION_TAG = 'translation';\nconst _PLACEHOLDER_TAG$3 = 'ph';\nclass Xtb extends Serializer {\n    write(messages, locale) {\n        throw new Error('Unsupported');\n    }\n    load(content, url) {\n        // xtb to xml nodes\n        const xtbParser = new XtbParser();\n        const { locale, msgIdToHtml, errors } = xtbParser.parse(content, url);\n        // xml nodes to i18n nodes\n        const i18nNodesByMsgId = {};\n        const converter = new XmlToI18n$2();\n        // Because we should be able to load xtb files that rely on features not supported by angular,\n        // we need to delay the conversion of html to i18n nodes so that non angular messages are not\n        // converted\n        Object.keys(msgIdToHtml).forEach(msgId => {\n            const valueFn = function () {\n                const { i18nNodes, errors } = converter.convert(msgIdToHtml[msgId], url);\n                if (errors.length) {\n                    throw new Error(`xtb parse errors:\\n${errors.join('\\n')}`);\n                }\n                return i18nNodes;\n            };\n            createLazyProperty(i18nNodesByMsgId, msgId, valueFn);\n        });\n        if (errors.length) {\n            throw new Error(`xtb parse errors:\\n${errors.join('\\n')}`);\n        }\n        return { locale: locale, i18nNodesByMsgId };\n    }\n    digest(message) {\n        return digest$1(message);\n    }\n    createNameMapper(message) {\n        return new SimplePlaceholderMapper(message, toPublicName);\n    }\n}\nfunction createLazyProperty(messages, id, valueFn) {\n    Object.defineProperty(messages, id, {\n        configurable: true,\n        enumerable: true,\n        get: function () {\n            const value = valueFn();\n            Object.defineProperty(messages, id, { enumerable: true, value });\n            return value;\n        },\n        set: _ => {\n            throw new Error('Could not overwrite an XTB translation');\n        },\n    });\n}\n// Extract messages as xml nodes from the xtb file\nclass XtbParser {\n    constructor() {\n        this._locale = null;\n    }\n    parse(xtb, url) {\n        this._bundleDepth = 0;\n        this._msgIdToHtml = {};\n        // We can not parse the ICU messages at this point as some messages might not originate\n        // from Angular that could not be lex'd.\n        const xml = new XmlParser().parse(xtb, url);\n        this._errors = xml.errors;\n        visitAll$1(this, xml.rootNodes);\n        return {\n            msgIdToHtml: this._msgIdToHtml,\n            errors: this._errors,\n            locale: this._locale,\n        };\n    }\n    visitElement(element, context) {\n        switch (element.name) {\n            case _TRANSLATIONS_TAG:\n                this._bundleDepth++;\n                if (this._bundleDepth > 1) {\n                    this._addError(element, `<${_TRANSLATIONS_TAG}> elements can not be nested`);\n                }\n                const langAttr = element.attrs.find((attr) => attr.name === 'lang');\n                if (langAttr) {\n                    this._locale = langAttr.value;\n                }\n                visitAll$1(this, element.children, null);\n                this._bundleDepth--;\n                break;\n            case _TRANSLATION_TAG:\n                const idAttr = element.attrs.find((attr) => attr.name === 'id');\n                if (!idAttr) {\n                    this._addError(element, `<${_TRANSLATION_TAG}> misses the \"id\" attribute`);\n                }\n                else {\n                    const id = idAttr.value;\n                    if (this._msgIdToHtml.hasOwnProperty(id)) {\n                        this._addError(element, `Duplicated translations for msg ${id}`);\n                    }\n                    else {\n                        const innerTextStart = element.startSourceSpan.end.offset;\n                        const innerTextEnd = element.endSourceSpan.start.offset;\n                        const content = element.startSourceSpan.start.file.content;\n                        const innerText = content.slice(innerTextStart, innerTextEnd);\n                        this._msgIdToHtml[id] = innerText;\n                    }\n                }\n                break;\n            default:\n                this._addError(element, 'Unexpected tag');\n        }\n    }\n    visitAttribute(attribute, context) { }\n    visitText(text, context) { }\n    visitComment(comment, context) { }\n    visitExpansion(expansion, context) { }\n    visitExpansionCase(expansionCase, context) { }\n    _addError(node, message) {\n        this._errors.push(new I18nError(node.sourceSpan, message));\n    }\n}\n// Convert ml nodes (xtb syntax) to i18n nodes\nclass XmlToI18n$2 {\n    convert(message, url) {\n        const xmlIcu = new XmlParser().parse(message, url, { tokenizeExpansionForms: true });\n        this._errors = xmlIcu.errors;\n        const i18nNodes = this._errors.length > 0 || xmlIcu.rootNodes.length == 0 ?\n            [] :\n            visitAll$1(this, xmlIcu.rootNodes);\n        return {\n            i18nNodes,\n            errors: this._errors,\n        };\n    }\n    visitText(text, context) {\n        return new Text$1(text.value, text.sourceSpan);\n    }\n    visitExpansion(icu, context) {\n        const caseMap = {};\n        visitAll$1(this, icu.cases).forEach(c => {\n            caseMap[c.value] = new Container(c.nodes, icu.sourceSpan);\n        });\n        return new Icu$1(icu.switchValue, icu.type, caseMap, icu.sourceSpan);\n    }\n    visitExpansionCase(icuCase, context) {\n        return {\n            value: icuCase.value,\n            nodes: visitAll$1(this, icuCase.expression),\n        };\n    }\n    visitElement(el, context) {\n        if (el.name === _PLACEHOLDER_TAG$3) {\n            const nameAttr = el.attrs.find((attr) => attr.name === 'name');\n            if (nameAttr) {\n                return new Placeholder('', nameAttr.value, el.sourceSpan);\n            }\n            this._addError(el, `<${_PLACEHOLDER_TAG$3}> misses the \"name\" attribute`);\n        }\n        else {\n            this._addError(el, `Unexpected tag`);\n        }\n        return null;\n    }\n    visitComment(comment, context) { }\n    visitAttribute(attribute, context) { }\n    _addError(node, message) {\n        this._errors.push(new I18nError(node.sourceSpan, message));\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * A container for translated messages\n */\nclass TranslationBundle {\n    constructor(_i18nNodesByMsgId = {}, locale, digest, mapperFactory, missingTranslationStrategy = MissingTranslationStrategy.Warning, console) {\n        this._i18nNodesByMsgId = _i18nNodesByMsgId;\n        this.digest = digest;\n        this.mapperFactory = mapperFactory;\n        this._i18nToHtml = new I18nToHtmlVisitor(_i18nNodesByMsgId, locale, digest, mapperFactory, missingTranslationStrategy, console);\n    }\n    // Creates a `TranslationBundle` by parsing the given `content` with the `serializer`.\n    static load(content, url, serializer, missingTranslationStrategy, console) {\n        const { locale, i18nNodesByMsgId } = serializer.load(content, url);\n        const digestFn = (m) => serializer.digest(m);\n        const mapperFactory = (m) => serializer.createNameMapper(m);\n        return new TranslationBundle(i18nNodesByMsgId, locale, digestFn, mapperFactory, missingTranslationStrategy, console);\n    }\n    // Returns the translation as HTML nodes from the given source message.\n    get(srcMsg) {\n        const html = this._i18nToHtml.convert(srcMsg);\n        if (html.errors.length) {\n            throw new Error(html.errors.join('\\n'));\n        }\n        return html.nodes;\n    }\n    has(srcMsg) {\n        return this.digest(srcMsg) in this._i18nNodesByMsgId;\n    }\n}\nclass I18nToHtmlVisitor {\n    constructor(_i18nNodesByMsgId = {}, _locale, _digest, _mapperFactory, _missingTranslationStrategy, _console) {\n        this._i18nNodesByMsgId = _i18nNodesByMsgId;\n        this._locale = _locale;\n        this._digest = _digest;\n        this._mapperFactory = _mapperFactory;\n        this._missingTranslationStrategy = _missingTranslationStrategy;\n        this._console = _console;\n        this._contextStack = [];\n        this._errors = [];\n    }\n    convert(srcMsg) {\n        this._contextStack.length = 0;\n        this._errors.length = 0;\n        // i18n to text\n        const text = this._convertToText(srcMsg);\n        // text to html\n        const url = srcMsg.nodes[0].sourceSpan.start.file.url;\n        const html = new HtmlParser().parse(text, url, { tokenizeExpansionForms: true });\n        return {\n            nodes: html.rootNodes,\n            errors: [...this._errors, ...html.errors],\n        };\n    }\n    visitText(text, context) {\n        // `convert()` uses an `HtmlParser` to return `html.Node`s\n        // we should then make sure that any special characters are escaped\n        return escapeXml(text.value);\n    }\n    visitContainer(container, context) {\n        return container.children.map(n => n.visit(this)).join('');\n    }\n    visitIcu(icu, context) {\n        const cases = Object.keys(icu.cases).map(k => `${k} {${icu.cases[k].visit(this)}}`);\n        // TODO(vicb): Once all format switch to using expression placeholders\n        // we should throw when the placeholder is not in the source message\n        const exp = this._srcMsg.placeholders.hasOwnProperty(icu.expression) ?\n            this._srcMsg.placeholders[icu.expression] :\n            icu.expression;\n        return `{${exp}, ${icu.type}, ${cases.join(' ')}}`;\n    }\n    visitPlaceholder(ph, context) {\n        const phName = this._mapper(ph.name);\n        if (this._srcMsg.placeholders.hasOwnProperty(phName)) {\n            return this._srcMsg.placeholders[phName];\n        }\n        if (this._srcMsg.placeholderToMessage.hasOwnProperty(phName)) {\n            return this._convertToText(this._srcMsg.placeholderToMessage[phName]);\n        }\n        this._addError(ph, `Unknown placeholder \"${ph.name}\"`);\n        return '';\n    }\n    // Loaded message contains only placeholders (vs tag and icu placeholders).\n    // However when a translation can not be found, we need to serialize the source message\n    // which can contain tag placeholders\n    visitTagPlaceholder(ph, context) {\n        const tag = `${ph.tag}`;\n        const attrs = Object.keys(ph.attrs).map(name => `${name}=\"${ph.attrs[name]}\"`).join(' ');\n        if (ph.isVoid) {\n            return `<${tag} ${attrs}/>`;\n        }\n        const children = ph.children.map((c) => c.visit(this)).join('');\n        return `<${tag} ${attrs}>${children}</${tag}>`;\n    }\n    // Loaded message contains only placeholders (vs tag and icu placeholders).\n    // However when a translation can not be found, we need to serialize the source message\n    // which can contain tag placeholders\n    visitIcuPlaceholder(ph, context) {\n        // An ICU placeholder references the source message to be serialized\n        return this._convertToText(this._srcMsg.placeholderToMessage[ph.name]);\n    }\n    /**\n     * Convert a source message to a translated text string:\n     * - text nodes are replaced with their translation,\n     * - placeholders are replaced with their content,\n     * - ICU nodes are converted to ICU expressions.\n     */\n    _convertToText(srcMsg) {\n        const id = this._digest(srcMsg);\n        const mapper = this._mapperFactory ? this._mapperFactory(srcMsg) : null;\n        let nodes;\n        this._contextStack.push({ msg: this._srcMsg, mapper: this._mapper });\n        this._srcMsg = srcMsg;\n        if (this._i18nNodesByMsgId.hasOwnProperty(id)) {\n            // When there is a translation use its nodes as the source\n            // And create a mapper to convert serialized placeholder names to internal names\n            nodes = this._i18nNodesByMsgId[id];\n            this._mapper = (name) => mapper ? mapper.toInternalName(name) : name;\n        }\n        else {\n            // When no translation has been found\n            // - report an error / a warning / nothing,\n            // - use the nodes from the original message\n            // - placeholders are already internal and need no mapper\n            if (this._missingTranslationStrategy === MissingTranslationStrategy.Error) {\n                const ctx = this._locale ? ` for locale \"${this._locale}\"` : '';\n                this._addError(srcMsg.nodes[0], `Missing translation for message \"${id}\"${ctx}`);\n            }\n            else if (this._console &&\n                this._missingTranslationStrategy === MissingTranslationStrategy.Warning) {\n                const ctx = this._locale ? ` for locale \"${this._locale}\"` : '';\n                this._console.warn(`Missing translation for message \"${id}\"${ctx}`);\n            }\n            nodes = srcMsg.nodes;\n            this._mapper = (name) => name;\n        }\n        const text = nodes.map(node => node.visit(this)).join('');\n        const context = this._contextStack.pop();\n        this._srcMsg = context.msg;\n        this._mapper = context.mapper;\n        return text;\n    }\n    _addError(el, msg) {\n        this._errors.push(new I18nError(el.sourceSpan, msg));\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass I18NHtmlParser {\n    constructor(_htmlParser, translations, translationsFormat, missingTranslation = MissingTranslationStrategy.Warning, console) {\n        this._htmlParser = _htmlParser;\n        if (translations) {\n            const serializer = createSerializer(translationsFormat);\n            this._translationBundle =\n                TranslationBundle.load(translations, 'i18n', serializer, missingTranslation, console);\n        }\n        else {\n            this._translationBundle =\n                new TranslationBundle({}, null, digest, undefined, missingTranslation, console);\n        }\n    }\n    parse(source, url, options = {}) {\n        const interpolationConfig = options.interpolationConfig || DEFAULT_INTERPOLATION_CONFIG;\n        const parseResult = this._htmlParser.parse(source, url, Object.assign({ interpolationConfig }, options));\n        if (parseResult.errors.length) {\n            return new ParseTreeResult(parseResult.rootNodes, parseResult.errors);\n        }\n        return mergeTranslations(parseResult.rootNodes, this._translationBundle, interpolationConfig, [], {});\n    }\n}\nfunction createSerializer(format) {\n    format = (format || 'xlf').toLowerCase();\n    switch (format) {\n        case 'xmb':\n            return new Xmb();\n        case 'xtb':\n            return new Xtb();\n        case 'xliff2':\n        case 'xlf2':\n            return new Xliff2();\n        case 'xliff':\n        case 'xlf':\n        default:\n            return new Xliff();\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst QUOTED_KEYS = '$quoted$';\nfunction convertValueToOutputAst(ctx, value, type = null) {\n    return visitValue(value, new _ValueOutputAstTransformer(ctx), type);\n}\nclass _ValueOutputAstTransformer {\n    constructor(ctx) {\n        this.ctx = ctx;\n    }\n    visitArray(arr, type) {\n        const values = [];\n        // Note Array.map() must not be used to convert the values because it will\n        // skip over empty elements in arrays constructed using `new Array(length)`,\n        // resulting in `undefined` elements. This breaks the type guarantee that\n        // all values in `o.LiteralArrayExpr` are of type `o.Expression`.\n        // See test case in `value_util_spec.ts`.\n        for (let i = 0; i < arr.length; ++i) {\n            values.push(visitValue(arr[i], this, null /* context */));\n        }\n        return literalArr(values, type);\n    }\n    visitStringMap(map, type) {\n        const entries = [];\n        const quotedSet = new Set(map && map[QUOTED_KEYS]);\n        Object.keys(map).forEach(key => {\n            entries.push(new LiteralMapEntry(key, visitValue(map[key], this, null), quotedSet.has(key)));\n        });\n        return new LiteralMapExpr(entries, type);\n    }\n    visitPrimitive(value, type) {\n        return literal(value, type);\n    }\n    visitOther(value, type) {\n        if (value instanceof Expression) {\n            return value;\n        }\n        else {\n            return this.ctx.importExpr(value);\n        }\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction mapEntry$1(key, value) {\n    return { key, value, quoted: false };\n}\nclass InjectableCompiler {\n    constructor(reflector, alwaysGenerateDef) {\n        this.reflector = reflector;\n        this.alwaysGenerateDef = alwaysGenerateDef;\n        this.tokenInjector = reflector.resolveExternalReference(Identifiers.Injector);\n    }\n    depsArray(deps, ctx) {\n        return deps.map(dep => {\n            let token = dep;\n            let args = [token];\n            let flags = 0 /* Default */;\n            if (Array.isArray(dep)) {\n                for (let i = 0; i < dep.length; i++) {\n                    const v = dep[i];\n                    if (v) {\n                        if (v.ngMetadataName === 'Optional') {\n                            flags |= 8 /* Optional */;\n                        }\n                        else if (v.ngMetadataName === 'SkipSelf') {\n                            flags |= 4 /* SkipSelf */;\n                        }\n                        else if (v.ngMetadataName === 'Self') {\n                            flags |= 2 /* Self */;\n                        }\n                        else if (v.ngMetadataName === 'Inject') {\n                            token = v.token;\n                        }\n                        else {\n                            token = v;\n                        }\n                    }\n                }\n            }\n            let tokenExpr;\n            if (typeof token === 'string') {\n                tokenExpr = literal(token);\n            }\n            else if (token === this.tokenInjector) {\n                tokenExpr = importExpr(Identifiers.INJECTOR);\n            }\n            else {\n                tokenExpr = ctx.importExpr(token);\n            }\n            if (flags !== 0 /* Default */) {\n                args = [tokenExpr, literal(flags)];\n            }\n            else {\n                args = [tokenExpr];\n            }\n            return importExpr(Identifiers.inject).callFn(args);\n        });\n    }\n    factoryFor(injectable, ctx) {\n        let retValue;\n        if (injectable.useExisting) {\n            retValue = importExpr(Identifiers.inject).callFn([ctx.importExpr(injectable.useExisting)]);\n        }\n        else if (injectable.useFactory) {\n            const deps = injectable.deps || [];\n            if (deps.length > 0) {\n                retValue = ctx.importExpr(injectable.useFactory).callFn(this.depsArray(deps, ctx));\n            }\n            else {\n                return ctx.importExpr(injectable.useFactory);\n            }\n        }\n        else if (injectable.useValue) {\n            retValue = convertValueToOutputAst(ctx, injectable.useValue);\n        }\n        else {\n            const clazz = injectable.useClass || injectable.symbol;\n            const depArgs = this.depsArray(this.reflector.parameters(clazz), ctx);\n            retValue = new InstantiateExpr(ctx.importExpr(clazz), depArgs);\n        }\n        return fn([], [new ReturnStatement(retValue)], undefined, undefined, injectable.symbol.name + '_Factory');\n    }\n    injectableDef(injectable, ctx) {\n        let providedIn = NULL_EXPR;\n        if (injectable.providedIn !== undefined) {\n            if (injectable.providedIn === null) {\n                providedIn = NULL_EXPR;\n            }\n            else if (typeof injectable.providedIn === 'string') {\n                providedIn = literal(injectable.providedIn);\n            }\n            else {\n                providedIn = ctx.importExpr(injectable.providedIn);\n            }\n        }\n        const def = [\n            mapEntry$1('factory', this.factoryFor(injectable, ctx)),\n            mapEntry$1('token', ctx.importExpr(injectable.type.reference)),\n            mapEntry$1('providedIn', providedIn),\n        ];\n        return importExpr(Identifiers.ɵɵdefineInjectable).callFn([literalMap(def)]);\n    }\n    compile(injectable, ctx) {\n        if (this.alwaysGenerateDef || injectable.providedIn !== undefined) {\n            const className = identifierName(injectable.type);\n            const clazz = new ClassStmt(className, null, [\n                new ClassField('ɵprov', INFERRED_TYPE, [StmtModifier.Static], this.injectableDef(injectable, ctx)),\n            ], [], new ClassMethod(null, [], []), []);\n            ctx.statements.push(clazz);\n        }\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst STRIP_SRC_FILE_SUFFIXES = /(\\.ts|\\.d\\.ts|\\.js|\\.jsx|\\.tsx)$/;\nconst GENERATED_FILE = /\\.ngfactory\\.|\\.ngsummary\\./;\nconst JIT_SUMMARY_FILE = /\\.ngsummary\\./;\nconst JIT_SUMMARY_NAME = /NgSummary$/;\nfunction ngfactoryFilePath(filePath, forceSourceFile = false) {\n    const urlWithSuffix = splitTypescriptSuffix(filePath, forceSourceFile);\n    return `${urlWithSuffix[0]}.ngfactory${normalizeGenFileSuffix(urlWithSuffix[1])}`;\n}\nfunction stripGeneratedFileSuffix(filePath) {\n    return filePath.replace(GENERATED_FILE, '.');\n}\nfunction isGeneratedFile(filePath) {\n    return GENERATED_FILE.test(filePath);\n}\nfunction splitTypescriptSuffix(path, forceSourceFile = false) {\n    if (path.endsWith('.d.ts')) {\n        return [path.slice(0, -5), forceSourceFile ? '.ts' : '.d.ts'];\n    }\n    const lastDot = path.lastIndexOf('.');\n    if (lastDot !== -1) {\n        return [path.substring(0, lastDot), path.substring(lastDot)];\n    }\n    return [path, ''];\n}\nfunction normalizeGenFileSuffix(srcFileSuffix) {\n    return srcFileSuffix === '.tsx' ? '.ts' : srcFileSuffix;\n}\nfunction summaryFileName(fileName) {\n    const fileNameWithoutSuffix = fileName.replace(STRIP_SRC_FILE_SUFFIXES, '');\n    return `${fileNameWithoutSuffix}.ngsummary.json`;\n}\nfunction summaryForJitFileName(fileName, forceSourceFile = false) {\n    const urlWithSuffix = splitTypescriptSuffix(stripGeneratedFileSuffix(fileName), forceSourceFile);\n    return `${urlWithSuffix[0]}.ngsummary${urlWithSuffix[1]}`;\n}\nfunction stripSummaryForJitFileSuffix(filePath) {\n    return filePath.replace(JIT_SUMMARY_FILE, '.');\n}\nfunction summaryForJitName(symbolName) {\n    return `${symbolName}NgSummary`;\n}\nfunction stripSummaryForJitNameSuffix(symbolName) {\n    return symbolName.replace(JIT_SUMMARY_NAME, '');\n}\nconst LOWERED_SYMBOL = /\\u0275\\d+/;\nfunction isLoweredSymbol(name) {\n    return LOWERED_SYMBOL.test(name);\n}\nfunction createLoweredSymbol(id) {\n    return `\\u0275${id}`;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nvar LifecycleHooks;\n(function (LifecycleHooks) {\n    LifecycleHooks[LifecycleHooks[\"OnInit\"] = 0] = \"OnInit\";\n    LifecycleHooks[LifecycleHooks[\"OnDestroy\"] = 1] = \"OnDestroy\";\n    LifecycleHooks[LifecycleHooks[\"DoCheck\"] = 2] = \"DoCheck\";\n    LifecycleHooks[LifecycleHooks[\"OnChanges\"] = 3] = \"OnChanges\";\n    LifecycleHooks[LifecycleHooks[\"AfterContentInit\"] = 4] = \"AfterContentInit\";\n    LifecycleHooks[LifecycleHooks[\"AfterContentChecked\"] = 5] = \"AfterContentChecked\";\n    LifecycleHooks[LifecycleHooks[\"AfterViewInit\"] = 6] = \"AfterViewInit\";\n    LifecycleHooks[LifecycleHooks[\"AfterViewChecked\"] = 7] = \"AfterViewChecked\";\n})(LifecycleHooks || (LifecycleHooks = {}));\nconst LIFECYCLE_HOOKS_VALUES = [\n    LifecycleHooks.OnInit, LifecycleHooks.OnDestroy, LifecycleHooks.DoCheck, LifecycleHooks.OnChanges,\n    LifecycleHooks.AfterContentInit, LifecycleHooks.AfterContentChecked, LifecycleHooks.AfterViewInit,\n    LifecycleHooks.AfterViewChecked\n];\nfunction hasLifecycleHook(reflector, hook, token) {\n    return reflector.hasLifecycleHook(token, getHookName(hook));\n}\nfunction getAllLifecycleHooks(reflector, token) {\n    return LIFECYCLE_HOOKS_VALUES.filter(hook => hasLifecycleHook(reflector, hook, token));\n}\nfunction getHookName(hook) {\n    switch (hook) {\n        case LifecycleHooks.OnInit:\n            return 'ngOnInit';\n        case LifecycleHooks.OnDestroy:\n            return 'ngOnDestroy';\n        case LifecycleHooks.DoCheck:\n            return 'ngDoCheck';\n        case LifecycleHooks.OnChanges:\n            return 'ngOnChanges';\n        case LifecycleHooks.AfterContentInit:\n            return 'ngAfterContentInit';\n        case LifecycleHooks.AfterContentChecked:\n            return 'ngAfterContentChecked';\n        case LifecycleHooks.AfterViewInit:\n            return 'ngAfterViewInit';\n        case LifecycleHooks.AfterViewChecked:\n            return 'ngAfterViewChecked';\n        default:\n            // This default case is not needed by TypeScript compiler, as the switch is exhaustive.\n            // However Closure Compiler does not understand that and reports an error in typed mode.\n            // The `throw new Error` below works around the problem, and the unexpected: never variable\n            // makes sure tsc still checks this code is unreachable.\n            const unexpected = hook;\n            throw new Error(`unexpected ${unexpected}`);\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst ERROR_COMPONENT_TYPE = 'ngComponentType';\n// Design notes:\n// - don't lazily create metadata:\n//   For some metadata, we need to do async work sometimes,\n//   so the user has to kick off this loading.\n//   But we want to report errors even when the async work is\n//   not required to check that the user would have been able\n//   to wait correctly.\nclass CompileMetadataResolver {\n    constructor(_config, _htmlParser, _ngModuleResolver, _directiveResolver, _pipeResolver, _summaryResolver, _schemaRegistry, _directiveNormalizer, _console, _staticSymbolCache, _reflector, _errorCollector) {\n        this._config = _config;\n        this._htmlParser = _htmlParser;\n        this._ngModuleResolver = _ngModuleResolver;\n        this._directiveResolver = _directiveResolver;\n        this._pipeResolver = _pipeResolver;\n        this._summaryResolver = _summaryResolver;\n        this._schemaRegistry = _schemaRegistry;\n        this._directiveNormalizer = _directiveNormalizer;\n        this._console = _console;\n        this._staticSymbolCache = _staticSymbolCache;\n        this._reflector = _reflector;\n        this._errorCollector = _errorCollector;\n        this._nonNormalizedDirectiveCache = new Map();\n        this._directiveCache = new Map();\n        this._summaryCache = new Map();\n        this._pipeCache = new Map();\n        this._ngModuleCache = new Map();\n        this._ngModuleOfTypes = new Map();\n        this._shallowModuleCache = new Map();\n    }\n    getReflector() {\n        return this._reflector;\n    }\n    clearCacheFor(type) {\n        const dirMeta = this._directiveCache.get(type);\n        this._directiveCache.delete(type);\n        this._nonNormalizedDirectiveCache.delete(type);\n        this._summaryCache.delete(type);\n        this._pipeCache.delete(type);\n        this._ngModuleOfTypes.delete(type);\n        // Clear all of the NgModule as they contain transitive information!\n        this._ngModuleCache.clear();\n        if (dirMeta) {\n            this._directiveNormalizer.clearCacheFor(dirMeta);\n        }\n    }\n    clearCache() {\n        this._directiveCache.clear();\n        this._nonNormalizedDirectiveCache.clear();\n        this._summaryCache.clear();\n        this._pipeCache.clear();\n        this._ngModuleCache.clear();\n        this._ngModuleOfTypes.clear();\n        this._directiveNormalizer.clearCache();\n    }\n    _createProxyClass(baseType, name) {\n        let delegate = null;\n        const proxyClass = function () {\n            if (!delegate) {\n                throw new Error(`Illegal state: Class ${name} for type ${stringify(baseType)} is not compiled yet!`);\n            }\n            return delegate.apply(this, arguments);\n        };\n        proxyClass.setDelegate = (d) => {\n            delegate = d;\n            proxyClass.prototype = d.prototype;\n        };\n        // Make stringify work correctly\n        proxyClass.overriddenName = name;\n        return proxyClass;\n    }\n    getGeneratedClass(dirType, name) {\n        if (dirType instanceof StaticSymbol) {\n            return this._staticSymbolCache.get(ngfactoryFilePath(dirType.filePath), name);\n        }\n        else {\n            return this._createProxyClass(dirType, name);\n        }\n    }\n    getComponentViewClass(dirType) {\n        return this.getGeneratedClass(dirType, viewClassName(dirType, 0));\n    }\n    getHostComponentViewClass(dirType) {\n        return this.getGeneratedClass(dirType, hostViewClassName(dirType));\n    }\n    getHostComponentType(dirType) {\n        const name = `${identifierName({ reference: dirType })}_Host`;\n        if (dirType instanceof StaticSymbol) {\n            return this._staticSymbolCache.get(dirType.filePath, name);\n        }\n        return this._createProxyClass(dirType, name);\n    }\n    getRendererType(dirType) {\n        if (dirType instanceof StaticSymbol) {\n            return this._staticSymbolCache.get(ngfactoryFilePath(dirType.filePath), rendererTypeName(dirType));\n        }\n        else {\n            // returning an object as proxy,\n            // that we fill later during runtime compilation.\n            return {};\n        }\n    }\n    getComponentFactory(selector, dirType, inputs, outputs) {\n        if (dirType instanceof StaticSymbol) {\n            return this._staticSymbolCache.get(ngfactoryFilePath(dirType.filePath), componentFactoryName(dirType));\n        }\n        else {\n            const hostView = this.getHostComponentViewClass(dirType);\n            // Note: ngContentSelectors will be filled later once the template is\n            // loaded.\n            const createComponentFactory = this._reflector.resolveExternalReference(Identifiers.createComponentFactory);\n            return createComponentFactory(selector, dirType, hostView, inputs, outputs, []);\n        }\n    }\n    initComponentFactory(factory, ngContentSelectors) {\n        if (!(factory instanceof StaticSymbol)) {\n            factory.ngContentSelectors.push(...ngContentSelectors);\n        }\n    }\n    _loadSummary(type, kind) {\n        let typeSummary = this._summaryCache.get(type);\n        if (!typeSummary) {\n            const summary = this._summaryResolver.resolveSummary(type);\n            typeSummary = summary ? summary.type : null;\n            this._summaryCache.set(type, typeSummary || null);\n        }\n        return typeSummary && typeSummary.summaryKind === kind ? typeSummary : null;\n    }\n    getHostComponentMetadata(compMeta, hostViewType) {\n        const hostType = this.getHostComponentType(compMeta.type.reference);\n        if (!hostViewType) {\n            hostViewType = this.getHostComponentViewClass(hostType);\n        }\n        // Note: ! is ok here as this method should only be called with normalized directive\n        // metadata, which always fills in the selector.\n        const template = CssSelector.parse(compMeta.selector)[0].getMatchingElementTemplate();\n        const templateUrl = '';\n        const htmlAst = this._htmlParser.parse(template, templateUrl);\n        return CompileDirectiveMetadata.create({\n            isHost: true,\n            type: { reference: hostType, diDeps: [], lifecycleHooks: [] },\n            template: new CompileTemplateMetadata({\n                encapsulation: ViewEncapsulation.None,\n                template,\n                templateUrl,\n                htmlAst,\n                styles: [],\n                styleUrls: [],\n                ngContentSelectors: [],\n                animations: [],\n                isInline: true,\n                externalStylesheets: [],\n                interpolation: null,\n                preserveWhitespaces: false,\n            }),\n            exportAs: null,\n            changeDetection: ChangeDetectionStrategy.Default,\n            inputs: [],\n            outputs: [],\n            host: {},\n            isComponent: true,\n            selector: '*',\n            providers: [],\n            viewProviders: [],\n            queries: [],\n            guards: {},\n            viewQueries: [],\n            componentViewType: hostViewType,\n            rendererType: { id: '__Host__', encapsulation: ViewEncapsulation.None, styles: [], data: {} },\n            entryComponents: [],\n            componentFactory: null\n        });\n    }\n    loadDirectiveMetadata(ngModuleType, directiveType, isSync) {\n        if (this._directiveCache.has(directiveType)) {\n            return null;\n        }\n        directiveType = resolveForwardRef(directiveType);\n        const { annotation, metadata } = this.getNonNormalizedDirectiveMetadata(directiveType);\n        const createDirectiveMetadata = (templateMetadata) => {\n            const normalizedDirMeta = new CompileDirectiveMetadata({\n                isHost: false,\n                type: metadata.type,\n                isComponent: metadata.isComponent,\n                selector: metadata.selector,\n                exportAs: metadata.exportAs,\n                changeDetection: metadata.changeDetection,\n                inputs: metadata.inputs,\n                outputs: metadata.outputs,\n                hostListeners: metadata.hostListeners,\n                hostProperties: metadata.hostProperties,\n                hostAttributes: metadata.hostAttributes,\n                providers: metadata.providers,\n                viewProviders: metadata.viewProviders,\n                queries: metadata.queries,\n                guards: metadata.guards,\n                viewQueries: metadata.viewQueries,\n                entryComponents: metadata.entryComponents,\n                componentViewType: metadata.componentViewType,\n                rendererType: metadata.rendererType,\n                componentFactory: metadata.componentFactory,\n                template: templateMetadata\n            });\n            if (templateMetadata) {\n                this.initComponentFactory(metadata.componentFactory, templateMetadata.ngContentSelectors);\n            }\n            this._directiveCache.set(directiveType, normalizedDirMeta);\n            this._summaryCache.set(directiveType, normalizedDirMeta.toSummary());\n            return null;\n        };\n        if (metadata.isComponent) {\n            const template = metadata.template;\n            const templateMeta = this._directiveNormalizer.normalizeTemplate({\n                ngModuleType,\n                componentType: directiveType,\n                moduleUrl: this._reflector.componentModuleUrl(directiveType, annotation),\n                encapsulation: template.encapsulation,\n                template: template.template,\n                templateUrl: template.templateUrl,\n                styles: template.styles,\n                styleUrls: template.styleUrls,\n                animations: template.animations,\n                interpolation: template.interpolation,\n                preserveWhitespaces: template.preserveWhitespaces\n            });\n            if (isPromise(templateMeta) && isSync) {\n                this._reportError(componentStillLoadingError(directiveType), directiveType);\n                return null;\n            }\n            return SyncAsync.then(templateMeta, createDirectiveMetadata);\n        }\n        else {\n            // directive\n            createDirectiveMetadata(null);\n            return null;\n        }\n    }\n    getNonNormalizedDirectiveMetadata(directiveType) {\n        directiveType = resolveForwardRef(directiveType);\n        if (!directiveType) {\n            return null;\n        }\n        let cacheEntry = this._nonNormalizedDirectiveCache.get(directiveType);\n        if (cacheEntry) {\n            return cacheEntry;\n        }\n        const dirMeta = this._directiveResolver.resolve(directiveType, false);\n        if (!dirMeta) {\n            return null;\n        }\n        let nonNormalizedTemplateMetadata = undefined;\n        if (createComponent.isTypeOf(dirMeta)) {\n            // component\n            const compMeta = dirMeta;\n            assertArrayOfStrings('styles', compMeta.styles);\n            assertArrayOfStrings('styleUrls', compMeta.styleUrls);\n            assertInterpolationSymbols('interpolation', compMeta.interpolation);\n            const animations = compMeta.animations;\n            nonNormalizedTemplateMetadata = new CompileTemplateMetadata({\n                encapsulation: noUndefined(compMeta.encapsulation),\n                template: noUndefined(compMeta.template),\n                templateUrl: noUndefined(compMeta.templateUrl),\n                htmlAst: null,\n                styles: compMeta.styles || [],\n                styleUrls: compMeta.styleUrls || [],\n                animations: animations || [],\n                interpolation: noUndefined(compMeta.interpolation),\n                isInline: !!compMeta.template,\n                externalStylesheets: [],\n                ngContentSelectors: [],\n                preserveWhitespaces: noUndefined(dirMeta.preserveWhitespaces),\n            });\n        }\n        let changeDetectionStrategy = null;\n        let viewProviders = [];\n        let entryComponentMetadata = [];\n        let selector = dirMeta.selector;\n        if (createComponent.isTypeOf(dirMeta)) {\n            // Component\n            const compMeta = dirMeta;\n            changeDetectionStrategy = compMeta.changeDetection;\n            if (compMeta.viewProviders) {\n                viewProviders = this._getProvidersMetadata(compMeta.viewProviders, entryComponentMetadata, `viewProviders for \"${stringifyType(directiveType)}\"`, [], directiveType);\n            }\n            if (compMeta.entryComponents) {\n                entryComponentMetadata = flattenAndDedupeArray(compMeta.entryComponents)\n                    .map((type) => this._getEntryComponentMetadata(type))\n                    .concat(entryComponentMetadata);\n            }\n            if (!selector) {\n                selector = this._schemaRegistry.getDefaultComponentElementName();\n            }\n        }\n        else {\n            // Directive\n            if (!selector) {\n                selector = null;\n            }\n        }\n        let providers = [];\n        if (dirMeta.providers != null) {\n            providers = this._getProvidersMetadata(dirMeta.providers, entryComponentMetadata, `providers for \"${stringifyType(directiveType)}\"`, [], directiveType);\n        }\n        let queries = [];\n        let viewQueries = [];\n        if (dirMeta.queries != null) {\n            queries = this._getQueriesMetadata(dirMeta.queries, false, directiveType);\n            viewQueries = this._getQueriesMetadata(dirMeta.queries, true, directiveType);\n        }\n        const metadata = CompileDirectiveMetadata.create({\n            isHost: false,\n            selector: selector,\n            exportAs: noUndefined(dirMeta.exportAs),\n            isComponent: !!nonNormalizedTemplateMetadata,\n            type: this._getTypeMetadata(directiveType),\n            template: nonNormalizedTemplateMetadata,\n            changeDetection: changeDetectionStrategy,\n            inputs: dirMeta.inputs || [],\n            outputs: dirMeta.outputs || [],\n            host: dirMeta.host || {},\n            providers: providers || [],\n            viewProviders: viewProviders || [],\n            queries: queries || [],\n            guards: dirMeta.guards || {},\n            viewQueries: viewQueries || [],\n            entryComponents: entryComponentMetadata,\n            componentViewType: nonNormalizedTemplateMetadata ? this.getComponentViewClass(directiveType) :\n                null,\n            rendererType: nonNormalizedTemplateMetadata ? this.getRendererType(directiveType) : null,\n            componentFactory: null\n        });\n        if (nonNormalizedTemplateMetadata) {\n            metadata.componentFactory =\n                this.getComponentFactory(selector, directiveType, metadata.inputs, metadata.outputs);\n        }\n        cacheEntry = { metadata, annotation: dirMeta };\n        this._nonNormalizedDirectiveCache.set(directiveType, cacheEntry);\n        return cacheEntry;\n    }\n    /**\n     * Gets the metadata for the given directive.\n     * This assumes `loadNgModuleDirectiveAndPipeMetadata` has been called first.\n     */\n    getDirectiveMetadata(directiveType) {\n        const dirMeta = this._directiveCache.get(directiveType);\n        if (!dirMeta) {\n            this._reportError(syntaxError(`Illegal state: getDirectiveMetadata can only be called after loadNgModuleDirectiveAndPipeMetadata for a module that declares it. Directive ${stringifyType(directiveType)}.`), directiveType);\n        }\n        return dirMeta;\n    }\n    getDirectiveSummary(dirType) {\n        const dirSummary = this._loadSummary(dirType, CompileSummaryKind.Directive);\n        if (!dirSummary) {\n            this._reportError(syntaxError(`Illegal state: Could not load the summary for directive ${stringifyType(dirType)}.`), dirType);\n        }\n        return dirSummary;\n    }\n    isDirective(type) {\n        return !!this._loadSummary(type, CompileSummaryKind.Directive) ||\n            this._directiveResolver.isDirective(type);\n    }\n    isAbstractDirective(type) {\n        const summary = this._loadSummary(type, CompileSummaryKind.Directive);\n        if (summary && !summary.isComponent) {\n            return !summary.selector;\n        }\n        const meta = this._directiveResolver.resolve(type, false);\n        if (meta && !createComponent.isTypeOf(meta)) {\n            return !meta.selector;\n        }\n        return false;\n    }\n    isPipe(type) {\n        return !!this._loadSummary(type, CompileSummaryKind.Pipe) ||\n            this._pipeResolver.isPipe(type);\n    }\n    isNgModule(type) {\n        return !!this._loadSummary(type, CompileSummaryKind.NgModule) ||\n            this._ngModuleResolver.isNgModule(type);\n    }\n    getNgModuleSummary(moduleType, alreadyCollecting = null) {\n        let moduleSummary = this._loadSummary(moduleType, CompileSummaryKind.NgModule);\n        if (!moduleSummary) {\n            const moduleMeta = this.getNgModuleMetadata(moduleType, false, alreadyCollecting);\n            moduleSummary = moduleMeta ? moduleMeta.toSummary() : null;\n            if (moduleSummary) {\n                this._summaryCache.set(moduleType, moduleSummary);\n            }\n        }\n        return moduleSummary;\n    }\n    /**\n     * Loads the declared directives and pipes of an NgModule.\n     */\n    loadNgModuleDirectiveAndPipeMetadata(moduleType, isSync, throwIfNotFound = true) {\n        const ngModule = this.getNgModuleMetadata(moduleType, throwIfNotFound);\n        const loading = [];\n        if (ngModule) {\n            ngModule.declaredDirectives.forEach((id) => {\n                const promise = this.loadDirectiveMetadata(moduleType, id.reference, isSync);\n                if (promise) {\n                    loading.push(promise);\n                }\n            });\n            ngModule.declaredPipes.forEach((id) => this._loadPipeMetadata(id.reference));\n        }\n        return Promise.all(loading);\n    }\n    getShallowModuleMetadata(moduleType) {\n        let compileMeta = this._shallowModuleCache.get(moduleType);\n        if (compileMeta) {\n            return compileMeta;\n        }\n        const ngModuleMeta = findLast(this._reflector.shallowAnnotations(moduleType), createNgModule.isTypeOf);\n        compileMeta = {\n            type: this._getTypeMetadata(moduleType),\n            rawExports: ngModuleMeta.exports,\n            rawImports: ngModuleMeta.imports,\n            rawProviders: ngModuleMeta.providers,\n        };\n        this._shallowModuleCache.set(moduleType, compileMeta);\n        return compileMeta;\n    }\n    getNgModuleMetadata(moduleType, throwIfNotFound = true, alreadyCollecting = null) {\n        moduleType = resolveForwardRef(moduleType);\n        let compileMeta = this._ngModuleCache.get(moduleType);\n        if (compileMeta) {\n            return compileMeta;\n        }\n        const meta = this._ngModuleResolver.resolve(moduleType, throwIfNotFound);\n        if (!meta) {\n            return null;\n        }\n        const declaredDirectives = [];\n        const exportedNonModuleIdentifiers = [];\n        const declaredPipes = [];\n        const importedModules = [];\n        const exportedModules = [];\n        const providers = [];\n        const entryComponents = [];\n        const bootstrapComponents = [];\n        const schemas = [];\n        if (meta.imports) {\n            flattenAndDedupeArray(meta.imports).forEach((importedType) => {\n                let importedModuleType = undefined;\n                if (isValidType(importedType)) {\n                    importedModuleType = importedType;\n                }\n                else if (importedType && importedType.ngModule) {\n                    const moduleWithProviders = importedType;\n                    importedModuleType = moduleWithProviders.ngModule;\n                    if (moduleWithProviders.providers) {\n                        providers.push(...this._getProvidersMetadata(moduleWithProviders.providers, entryComponents, `provider for the NgModule '${stringifyType(importedModuleType)}'`, [], importedType));\n                    }\n                }\n                if (importedModuleType) {\n                    if (this._checkSelfImport(moduleType, importedModuleType))\n                        return;\n                    if (!alreadyCollecting)\n                        alreadyCollecting = new Set();\n                    if (alreadyCollecting.has(importedModuleType)) {\n                        this._reportError(syntaxError(`${this._getTypeDescriptor(importedModuleType)} '${stringifyType(importedType)}' is imported recursively by the module '${stringifyType(moduleType)}'.`), moduleType);\n                        return;\n                    }\n                    alreadyCollecting.add(importedModuleType);\n                    const importedModuleSummary = this.getNgModuleSummary(importedModuleType, alreadyCollecting);\n                    alreadyCollecting.delete(importedModuleType);\n                    if (!importedModuleSummary) {\n                        this._reportError(syntaxError(`Unexpected ${this._getTypeDescriptor(importedType)} '${stringifyType(importedType)}' imported by the module '${stringifyType(moduleType)}'. Please add a @NgModule annotation.`), moduleType);\n                        return;\n                    }\n                    importedModules.push(importedModuleSummary);\n                }\n                else {\n                    this._reportError(syntaxError(`Unexpected value '${stringifyType(importedType)}' imported by the module '${stringifyType(moduleType)}'`), moduleType);\n                    return;\n                }\n            });\n        }\n        if (meta.exports) {\n            flattenAndDedupeArray(meta.exports).forEach((exportedType) => {\n                if (!isValidType(exportedType)) {\n                    this._reportError(syntaxError(`Unexpected value '${stringifyType(exportedType)}' exported by the module '${stringifyType(moduleType)}'`), moduleType);\n                    return;\n                }\n                if (!alreadyCollecting)\n                    alreadyCollecting = new Set();\n                if (alreadyCollecting.has(exportedType)) {\n                    this._reportError(syntaxError(`${this._getTypeDescriptor(exportedType)} '${stringify(exportedType)}' is exported recursively by the module '${stringifyType(moduleType)}'`), moduleType);\n                    return;\n                }\n                alreadyCollecting.add(exportedType);\n                const exportedModuleSummary = this.getNgModuleSummary(exportedType, alreadyCollecting);\n                alreadyCollecting.delete(exportedType);\n                if (exportedModuleSummary) {\n                    exportedModules.push(exportedModuleSummary);\n                }\n                else {\n                    exportedNonModuleIdentifiers.push(this._getIdentifierMetadata(exportedType));\n                }\n            });\n        }\n        // Note: This will be modified later, so we rely on\n        // getting a new instance every time!\n        const transitiveModule = this._getTransitiveNgModuleMetadata(importedModules, exportedModules);\n        if (meta.declarations) {\n            flattenAndDedupeArray(meta.declarations).forEach((declaredType) => {\n                if (!isValidType(declaredType)) {\n                    this._reportError(syntaxError(`Unexpected value '${stringifyType(declaredType)}' declared by the module '${stringifyType(moduleType)}'`), moduleType);\n                    return;\n                }\n                const declaredIdentifier = this._getIdentifierMetadata(declaredType);\n                if (this.isDirective(declaredType)) {\n                    if (this.isAbstractDirective(declaredType)) {\n                        this._reportError(syntaxError(`Directive ${stringifyType(declaredType)} has no selector, please add it!`), declaredType);\n                    }\n                    transitiveModule.addDirective(declaredIdentifier);\n                    declaredDirectives.push(declaredIdentifier);\n                    this._addTypeToModule(declaredType, moduleType);\n                }\n                else if (this.isPipe(declaredType)) {\n                    transitiveModule.addPipe(declaredIdentifier);\n                    transitiveModule.pipes.push(declaredIdentifier);\n                    declaredPipes.push(declaredIdentifier);\n                    this._addTypeToModule(declaredType, moduleType);\n                }\n                else {\n                    this._reportError(syntaxError(`Unexpected ${this._getTypeDescriptor(declaredType)} '${stringifyType(declaredType)}' declared by the module '${stringifyType(moduleType)}'. Please add a @Pipe/@Directive/@Component annotation.`), moduleType);\n                    return;\n                }\n            });\n        }\n        const exportedDirectives = [];\n        const exportedPipes = [];\n        exportedNonModuleIdentifiers.forEach((exportedId) => {\n            if (transitiveModule.directivesSet.has(exportedId.reference)) {\n                exportedDirectives.push(exportedId);\n                transitiveModule.addExportedDirective(exportedId);\n            }\n            else if (transitiveModule.pipesSet.has(exportedId.reference)) {\n                exportedPipes.push(exportedId);\n                transitiveModule.addExportedPipe(exportedId);\n            }\n            else {\n                this._reportError(syntaxError(`Can't export ${this._getTypeDescriptor(exportedId.reference)} ${stringifyType(exportedId.reference)} from ${stringifyType(moduleType)} as it was neither declared nor imported!`), moduleType);\n                return;\n            }\n        });\n        // The providers of the module have to go last\n        // so that they overwrite any other provider we already added.\n        if (meta.providers) {\n            providers.push(...this._getProvidersMetadata(meta.providers, entryComponents, `provider for the NgModule '${stringifyType(moduleType)}'`, [], moduleType));\n        }\n        if (meta.entryComponents) {\n            entryComponents.push(...flattenAndDedupeArray(meta.entryComponents)\n                .map(type => this._getEntryComponentMetadata(type)));\n        }\n        if (meta.bootstrap) {\n            flattenAndDedupeArray(meta.bootstrap).forEach(type => {\n                if (!isValidType(type)) {\n                    this._reportError(syntaxError(`Unexpected value '${stringifyType(type)}' used in the bootstrap property of module '${stringifyType(moduleType)}'`), moduleType);\n                    return;\n                }\n                bootstrapComponents.push(this._getIdentifierMetadata(type));\n            });\n        }\n        entryComponents.push(...bootstrapComponents.map(type => this._getEntryComponentMetadata(type.reference)));\n        if (meta.schemas) {\n            schemas.push(...flattenAndDedupeArray(meta.schemas));\n        }\n        compileMeta = new CompileNgModuleMetadata({\n            type: this._getTypeMetadata(moduleType),\n            providers,\n            entryComponents,\n            bootstrapComponents,\n            schemas,\n            declaredDirectives,\n            exportedDirectives,\n            declaredPipes,\n            exportedPipes,\n            importedModules,\n            exportedModules,\n            transitiveModule,\n            id: meta.id || null,\n        });\n        entryComponents.forEach((id) => transitiveModule.addEntryComponent(id));\n        providers.forEach((provider) => transitiveModule.addProvider(provider, compileMeta.type));\n        transitiveModule.addModule(compileMeta.type);\n        this._ngModuleCache.set(moduleType, compileMeta);\n        return compileMeta;\n    }\n    _checkSelfImport(moduleType, importedModuleType) {\n        if (moduleType === importedModuleType) {\n            this._reportError(syntaxError(`'${stringifyType(moduleType)}' module can't import itself`), moduleType);\n            return true;\n        }\n        return false;\n    }\n    _getTypeDescriptor(type) {\n        if (isValidType(type)) {\n            if (this.isDirective(type)) {\n                return 'directive';\n            }\n            if (this.isPipe(type)) {\n                return 'pipe';\n            }\n            if (this.isNgModule(type)) {\n                return 'module';\n            }\n        }\n        if (type.provide) {\n            return 'provider';\n        }\n        return 'value';\n    }\n    _addTypeToModule(type, moduleType) {\n        const oldModule = this._ngModuleOfTypes.get(type);\n        if (oldModule && oldModule !== moduleType) {\n            this._reportError(syntaxError(`Type ${stringifyType(type)} is part of the declarations of 2 modules: ${stringifyType(oldModule)} and ${stringifyType(moduleType)}! ` +\n                `Please consider moving ${stringifyType(type)} to a higher module that imports ${stringifyType(oldModule)} and ${stringifyType(moduleType)}. ` +\n                `You can also create a new NgModule that exports and includes ${stringifyType(type)} then import that NgModule in ${stringifyType(oldModule)} and ${stringifyType(moduleType)}.`), moduleType);\n            return;\n        }\n        this._ngModuleOfTypes.set(type, moduleType);\n    }\n    _getTransitiveNgModuleMetadata(importedModules, exportedModules) {\n        // collect `providers` / `entryComponents` from all imported and all exported modules\n        const result = new TransitiveCompileNgModuleMetadata();\n        const modulesByToken = new Map();\n        importedModules.concat(exportedModules).forEach((modSummary) => {\n            modSummary.modules.forEach((mod) => result.addModule(mod));\n            modSummary.entryComponents.forEach((comp) => result.addEntryComponent(comp));\n            const addedTokens = new Set();\n            modSummary.providers.forEach((entry) => {\n                const tokenRef = tokenReference(entry.provider.token);\n                let prevModules = modulesByToken.get(tokenRef);\n                if (!prevModules) {\n                    prevModules = new Set();\n                    modulesByToken.set(tokenRef, prevModules);\n                }\n                const moduleRef = entry.module.reference;\n                // Note: the providers of one module may still contain multiple providers\n                // per token (e.g. for multi providers), and we need to preserve these.\n                if (addedTokens.has(tokenRef) || !prevModules.has(moduleRef)) {\n                    prevModules.add(moduleRef);\n                    addedTokens.add(tokenRef);\n                    result.addProvider(entry.provider, entry.module);\n                }\n            });\n        });\n        exportedModules.forEach((modSummary) => {\n            modSummary.exportedDirectives.forEach((id) => result.addExportedDirective(id));\n            modSummary.exportedPipes.forEach((id) => result.addExportedPipe(id));\n        });\n        importedModules.forEach((modSummary) => {\n            modSummary.exportedDirectives.forEach((id) => result.addDirective(id));\n            modSummary.exportedPipes.forEach((id) => result.addPipe(id));\n        });\n        return result;\n    }\n    _getIdentifierMetadata(type) {\n        type = resolveForwardRef(type);\n        return { reference: type };\n    }\n    isInjectable(type) {\n        const annotations = this._reflector.tryAnnotations(type);\n        return annotations.some(ann => createInjectable.isTypeOf(ann));\n    }\n    getInjectableSummary(type) {\n        return {\n            summaryKind: CompileSummaryKind.Injectable,\n            type: this._getTypeMetadata(type, null, false)\n        };\n    }\n    getInjectableMetadata(type, dependencies = null, throwOnUnknownDeps = true) {\n        const typeSummary = this._loadSummary(type, CompileSummaryKind.Injectable);\n        const typeMetadata = typeSummary ?\n            typeSummary.type :\n            this._getTypeMetadata(type, dependencies, throwOnUnknownDeps);\n        const annotations = this._reflector.annotations(type).filter(ann => createInjectable.isTypeOf(ann));\n        if (annotations.length === 0) {\n            return null;\n        }\n        const meta = annotations[annotations.length - 1];\n        return {\n            symbol: type,\n            type: typeMetadata,\n            providedIn: meta.providedIn,\n            useValue: meta.useValue,\n            useClass: meta.useClass,\n            useExisting: meta.useExisting,\n            useFactory: meta.useFactory,\n            deps: meta.deps,\n        };\n    }\n    _getTypeMetadata(type, dependencies = null, throwOnUnknownDeps = true) {\n        const identifier = this._getIdentifierMetadata(type);\n        return {\n            reference: identifier.reference,\n            diDeps: this._getDependenciesMetadata(identifier.reference, dependencies, throwOnUnknownDeps),\n            lifecycleHooks: getAllLifecycleHooks(this._reflector, identifier.reference),\n        };\n    }\n    _getFactoryMetadata(factory, dependencies = null) {\n        factory = resolveForwardRef(factory);\n        return { reference: factory, diDeps: this._getDependenciesMetadata(factory, dependencies) };\n    }\n    /**\n     * Gets the metadata for the given pipe.\n     * This assumes `loadNgModuleDirectiveAndPipeMetadata` has been called first.\n     */\n    getPipeMetadata(pipeType) {\n        const pipeMeta = this._pipeCache.get(pipeType);\n        if (!pipeMeta) {\n            this._reportError(syntaxError(`Illegal state: getPipeMetadata can only be called after loadNgModuleDirectiveAndPipeMetadata for a module that declares it. Pipe ${stringifyType(pipeType)}.`), pipeType);\n        }\n        return pipeMeta || null;\n    }\n    getPipeSummary(pipeType) {\n        const pipeSummary = this._loadSummary(pipeType, CompileSummaryKind.Pipe);\n        if (!pipeSummary) {\n            this._reportError(syntaxError(`Illegal state: Could not load the summary for pipe ${stringifyType(pipeType)}.`), pipeType);\n        }\n        return pipeSummary;\n    }\n    getOrLoadPipeMetadata(pipeType) {\n        let pipeMeta = this._pipeCache.get(pipeType);\n        if (!pipeMeta) {\n            pipeMeta = this._loadPipeMetadata(pipeType);\n        }\n        return pipeMeta;\n    }\n    _loadPipeMetadata(pipeType) {\n        pipeType = resolveForwardRef(pipeType);\n        const pipeAnnotation = this._pipeResolver.resolve(pipeType);\n        const pipeMeta = new CompilePipeMetadata({\n            type: this._getTypeMetadata(pipeType),\n            name: pipeAnnotation.name,\n            pure: !!pipeAnnotation.pure\n        });\n        this._pipeCache.set(pipeType, pipeMeta);\n        this._summaryCache.set(pipeType, pipeMeta.toSummary());\n        return pipeMeta;\n    }\n    _getDependenciesMetadata(typeOrFunc, dependencies, throwOnUnknownDeps = true) {\n        let hasUnknownDeps = false;\n        const params = dependencies || this._reflector.parameters(typeOrFunc) || [];\n        const dependenciesMetadata = params.map((param) => {\n            let isAttribute = false;\n            let isHost = false;\n            let isSelf = false;\n            let isSkipSelf = false;\n            let isOptional = false;\n            let token = null;\n            if (Array.isArray(param)) {\n                param.forEach((paramEntry) => {\n                    if (createHost.isTypeOf(paramEntry)) {\n                        isHost = true;\n                    }\n                    else if (createSelf.isTypeOf(paramEntry)) {\n                        isSelf = true;\n                    }\n                    else if (createSkipSelf.isTypeOf(paramEntry)) {\n                        isSkipSelf = true;\n                    }\n                    else if (createOptional.isTypeOf(paramEntry)) {\n                        isOptional = true;\n                    }\n                    else if (createAttribute.isTypeOf(paramEntry)) {\n                        isAttribute = true;\n                        token = paramEntry.attributeName;\n                    }\n                    else if (createInject.isTypeOf(paramEntry)) {\n                        token = paramEntry.token;\n                    }\n                    else if (createInjectionToken.isTypeOf(paramEntry) ||\n                        paramEntry instanceof StaticSymbol) {\n                        token = paramEntry;\n                    }\n                    else if (isValidType(paramEntry) && token == null) {\n                        token = paramEntry;\n                    }\n                });\n            }\n            else {\n                token = param;\n            }\n            if (token == null) {\n                hasUnknownDeps = true;\n                return {};\n            }\n            return {\n                isAttribute,\n                isHost,\n                isSelf,\n                isSkipSelf,\n                isOptional,\n                token: this._getTokenMetadata(token)\n            };\n        });\n        if (hasUnknownDeps) {\n            const depsTokens = dependenciesMetadata.map((dep) => dep.token ? stringifyType(dep.token) : '?').join(', ');\n            const message = `Can't resolve all parameters for ${stringifyType(typeOrFunc)}: (${depsTokens}).`;\n            if (throwOnUnknownDeps || this._config.strictInjectionParameters) {\n                this._reportError(syntaxError(message), typeOrFunc);\n            }\n        }\n        return dependenciesMetadata;\n    }\n    _getTokenMetadata(token) {\n        token = resolveForwardRef(token);\n        let compileToken;\n        if (typeof token === 'string') {\n            compileToken = { value: token };\n        }\n        else {\n            compileToken = { identifier: { reference: token } };\n        }\n        return compileToken;\n    }\n    _getProvidersMetadata(providers, targetEntryComponents, debugInfo, compileProviders = [], type) {\n        providers.forEach((provider, providerIdx) => {\n            if (Array.isArray(provider)) {\n                this._getProvidersMetadata(provider, targetEntryComponents, debugInfo, compileProviders);\n            }\n            else {\n                provider = resolveForwardRef(provider);\n                let providerMeta = undefined;\n                if (provider && typeof provider === 'object' && provider.hasOwnProperty('provide')) {\n                    this._validateProvider(provider);\n                    providerMeta = new ProviderMeta(provider.provide, provider);\n                }\n                else if (isValidType(provider)) {\n                    providerMeta = new ProviderMeta(provider, { useClass: provider });\n                }\n                else if (provider === void 0) {\n                    this._reportError(syntaxError(`Encountered undefined provider! Usually this means you have a circular dependencies. This might be caused by using 'barrel' index.ts files.`));\n                    return;\n                }\n                else {\n                    const providersInfo = providers\n                        .reduce((soFar, seenProvider, seenProviderIdx) => {\n                        if (seenProviderIdx < providerIdx) {\n                            soFar.push(`${stringifyType(seenProvider)}`);\n                        }\n                        else if (seenProviderIdx == providerIdx) {\n                            soFar.push(`?${stringifyType(seenProvider)}?`);\n                        }\n                        else if (seenProviderIdx == providerIdx + 1) {\n                            soFar.push('...');\n                        }\n                        return soFar;\n                    }, [])\n                        .join(', ');\n                    this._reportError(syntaxError(`Invalid ${debugInfo ?\n                        debugInfo :\n                        'provider'} - only instances of Provider and Type are allowed, got: [${providersInfo}]`), type);\n                    return;\n                }\n                if (providerMeta.token ===\n                    this._reflector.resolveExternalReference(Identifiers.ANALYZE_FOR_ENTRY_COMPONENTS)) {\n                    targetEntryComponents.push(...this._getEntryComponentsFromProvider(providerMeta, type));\n                }\n                else {\n                    compileProviders.push(this.getProviderMetadata(providerMeta));\n                }\n            }\n        });\n        return compileProviders;\n    }\n    _validateProvider(provider) {\n        if (provider.hasOwnProperty('useClass') && provider.useClass == null) {\n            this._reportError(syntaxError(`Invalid provider for ${stringifyType(provider.provide)}. useClass cannot be ${provider.useClass}.\n           Usually it happens when:\n           1. There's a circular dependency (might be caused by using index.ts (barrel) files).\n           2. Class was used before it was declared. Use forwardRef in this case.`));\n        }\n    }\n    _getEntryComponentsFromProvider(provider, type) {\n        const components = [];\n        const collectedIdentifiers = [];\n        if (provider.useFactory || provider.useExisting || provider.useClass) {\n            this._reportError(syntaxError(`The ANALYZE_FOR_ENTRY_COMPONENTS token only supports useValue!`), type);\n            return [];\n        }\n        if (!provider.multi) {\n            this._reportError(syntaxError(`The ANALYZE_FOR_ENTRY_COMPONENTS token only supports 'multi = true'!`), type);\n            return [];\n        }\n        extractIdentifiers(provider.useValue, collectedIdentifiers);\n        collectedIdentifiers.forEach((identifier) => {\n            const entry = this._getEntryComponentMetadata(identifier.reference, false);\n            if (entry) {\n                components.push(entry);\n            }\n        });\n        return components;\n    }\n    _getEntryComponentMetadata(dirType, throwIfNotFound = true) {\n        const dirMeta = this.getNonNormalizedDirectiveMetadata(dirType);\n        if (dirMeta && dirMeta.metadata.isComponent) {\n            return { componentType: dirType, componentFactory: dirMeta.metadata.componentFactory };\n        }\n        const dirSummary = this._loadSummary(dirType, CompileSummaryKind.Directive);\n        if (dirSummary && dirSummary.isComponent) {\n            return { componentType: dirType, componentFactory: dirSummary.componentFactory };\n        }\n        if (throwIfNotFound) {\n            throw syntaxError(`${dirType.name} cannot be used as an entry component.`);\n        }\n        return null;\n    }\n    _getInjectableTypeMetadata(type, dependencies = null) {\n        const typeSummary = this._loadSummary(type, CompileSummaryKind.Injectable);\n        if (typeSummary) {\n            return typeSummary.type;\n        }\n        return this._getTypeMetadata(type, dependencies);\n    }\n    getProviderMetadata(provider) {\n        let compileDeps = undefined;\n        let compileTypeMetadata = null;\n        let compileFactoryMetadata = null;\n        let token = this._getTokenMetadata(provider.token);\n        if (provider.useClass) {\n            compileTypeMetadata =\n                this._getInjectableTypeMetadata(provider.useClass, provider.dependencies);\n            compileDeps = compileTypeMetadata.diDeps;\n            if (provider.token === provider.useClass) {\n                // use the compileTypeMetadata as it contains information about lifecycleHooks...\n                token = { identifier: compileTypeMetadata };\n            }\n        }\n        else if (provider.useFactory) {\n            compileFactoryMetadata = this._getFactoryMetadata(provider.useFactory, provider.dependencies);\n            compileDeps = compileFactoryMetadata.diDeps;\n        }\n        return {\n            token: token,\n            useClass: compileTypeMetadata,\n            useValue: provider.useValue,\n            useFactory: compileFactoryMetadata,\n            useExisting: provider.useExisting ? this._getTokenMetadata(provider.useExisting) : undefined,\n            deps: compileDeps,\n            multi: provider.multi\n        };\n    }\n    _getQueriesMetadata(queries, isViewQuery, directiveType) {\n        const res = [];\n        Object.keys(queries).forEach((propertyName) => {\n            const query = queries[propertyName];\n            if (query.isViewQuery === isViewQuery) {\n                res.push(this._getQueryMetadata(query, propertyName, directiveType));\n            }\n        });\n        return res;\n    }\n    _queryVarBindings(selector) {\n        return selector.split(/\\s*,\\s*/);\n    }\n    _getQueryMetadata(q, propertyName, typeOrFunc) {\n        let selectors;\n        if (typeof q.selector === 'string') {\n            selectors =\n                this._queryVarBindings(q.selector).map(varName => this._getTokenMetadata(varName));\n        }\n        else {\n            if (!q.selector) {\n                this._reportError(syntaxError(`Can't construct a query for the property \"${propertyName}\" of \"${stringifyType(typeOrFunc)}\" since the query selector wasn't defined.`), typeOrFunc);\n                selectors = [];\n            }\n            else {\n                selectors = [this._getTokenMetadata(q.selector)];\n            }\n        }\n        return {\n            selectors,\n            first: q.first,\n            descendants: q.descendants,\n            propertyName,\n            read: q.read ? this._getTokenMetadata(q.read) : null,\n            static: q.static\n        };\n    }\n    _reportError(error, type, otherType) {\n        if (this._errorCollector) {\n            this._errorCollector(error, type);\n            if (otherType) {\n                this._errorCollector(error, otherType);\n            }\n        }\n        else {\n            throw error;\n        }\n    }\n}\nfunction flattenArray(tree, out = []) {\n    if (tree) {\n        for (let i = 0; i < tree.length; i++) {\n            const item = resolveForwardRef(tree[i]);\n            if (Array.isArray(item)) {\n                flattenArray(item, out);\n            }\n            else {\n                out.push(item);\n            }\n        }\n    }\n    return out;\n}\nfunction dedupeArray(array) {\n    if (array) {\n        return Array.from(new Set(array));\n    }\n    return [];\n}\nfunction flattenAndDedupeArray(tree) {\n    return dedupeArray(flattenArray(tree));\n}\nfunction isValidType(value) {\n    return (value instanceof StaticSymbol) || (value instanceof Type);\n}\nfunction extractIdentifiers(value, targetIdentifiers) {\n    visitValue(value, new _CompileValueConverter(), targetIdentifiers);\n}\nclass _CompileValueConverter extends ValueTransformer {\n    visitOther(value, targetIdentifiers) {\n        targetIdentifiers.push({ reference: value });\n    }\n}\nfunction stringifyType(type) {\n    if (type instanceof StaticSymbol) {\n        return `${type.name} in ${type.filePath}`;\n    }\n    else {\n        return stringify(type);\n    }\n}\n/**\n * Indicates that a component is still being loaded in a synchronous compile.\n */\nfunction componentStillLoadingError(compType) {\n    const error = Error(`Can't compile synchronously as ${stringify(compType)} is still being loaded!`);\n    error[ERROR_COMPONENT_TYPE] = compType;\n    return error;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction providerDef(ctx, providerAst) {\n    let flags = 0 /* None */;\n    if (!providerAst.eager) {\n        flags |= 4096 /* LazyProvider */;\n    }\n    if (providerAst.providerType === ProviderAstType.PrivateService) {\n        flags |= 8192 /* PrivateProvider */;\n    }\n    if (providerAst.isModule) {\n        flags |= 1073741824 /* TypeModuleProvider */;\n    }\n    providerAst.lifecycleHooks.forEach((lifecycleHook) => {\n        // for regular providers, we only support ngOnDestroy\n        if (lifecycleHook === LifecycleHooks.OnDestroy ||\n            providerAst.providerType === ProviderAstType.Directive ||\n            providerAst.providerType === ProviderAstType.Component) {\n            flags |= lifecycleHookToNodeFlag(lifecycleHook);\n        }\n    });\n    const { providerExpr, flags: providerFlags, depsExpr } = providerAst.multiProvider ?\n        multiProviderDef(ctx, flags, providerAst.providers) :\n        singleProviderDef(ctx, flags, providerAst.providerType, providerAst.providers[0]);\n    return {\n        providerExpr,\n        flags: providerFlags,\n        depsExpr,\n        tokenExpr: tokenExpr(ctx, providerAst.token),\n    };\n}\nfunction multiProviderDef(ctx, flags, providers) {\n    const allDepDefs = [];\n    const allParams = [];\n    const exprs = providers.map((provider, providerIndex) => {\n        let expr;\n        if (provider.useClass) {\n            const depExprs = convertDeps(providerIndex, provider.deps || provider.useClass.diDeps);\n            expr = ctx.importExpr(provider.useClass.reference).instantiate(depExprs);\n        }\n        else if (provider.useFactory) {\n            const depExprs = convertDeps(providerIndex, provider.deps || provider.useFactory.diDeps);\n            expr = ctx.importExpr(provider.useFactory.reference).callFn(depExprs);\n        }\n        else if (provider.useExisting) {\n            const depExprs = convertDeps(providerIndex, [{ token: provider.useExisting }]);\n            expr = depExprs[0];\n        }\n        else {\n            expr = convertValueToOutputAst(ctx, provider.useValue);\n        }\n        return expr;\n    });\n    const providerExpr = fn(allParams, [new ReturnStatement(literalArr(exprs))], INFERRED_TYPE);\n    return {\n        providerExpr,\n        flags: flags | 1024 /* TypeFactoryProvider */,\n        depsExpr: literalArr(allDepDefs)\n    };\n    function convertDeps(providerIndex, deps) {\n        return deps.map((dep, depIndex) => {\n            const paramName = `p${providerIndex}_${depIndex}`;\n            allParams.push(new FnParam(paramName, DYNAMIC_TYPE));\n            allDepDefs.push(depDef(ctx, dep));\n            return variable(paramName);\n        });\n    }\n}\nfunction singleProviderDef(ctx, flags, providerType, providerMeta) {\n    let providerExpr;\n    let deps;\n    if (providerType === ProviderAstType.Directive || providerType === ProviderAstType.Component) {\n        providerExpr = ctx.importExpr(providerMeta.useClass.reference);\n        flags |= 16384 /* TypeDirective */;\n        deps = providerMeta.deps || providerMeta.useClass.diDeps;\n    }\n    else {\n        if (providerMeta.useClass) {\n            providerExpr = ctx.importExpr(providerMeta.useClass.reference);\n            flags |= 512 /* TypeClassProvider */;\n            deps = providerMeta.deps || providerMeta.useClass.diDeps;\n        }\n        else if (providerMeta.useFactory) {\n            providerExpr = ctx.importExpr(providerMeta.useFactory.reference);\n            flags |= 1024 /* TypeFactoryProvider */;\n            deps = providerMeta.deps || providerMeta.useFactory.diDeps;\n        }\n        else if (providerMeta.useExisting) {\n            providerExpr = NULL_EXPR;\n            flags |= 2048 /* TypeUseExistingProvider */;\n            deps = [{ token: providerMeta.useExisting }];\n        }\n        else {\n            providerExpr = convertValueToOutputAst(ctx, providerMeta.useValue);\n            flags |= 256 /* TypeValueProvider */;\n            deps = [];\n        }\n    }\n    const depsExpr = literalArr(deps.map(dep => depDef(ctx, dep)));\n    return { providerExpr, flags, depsExpr };\n}\nfunction tokenExpr(ctx, tokenMeta) {\n    return tokenMeta.identifier ? ctx.importExpr(tokenMeta.identifier.reference) :\n        literal(tokenMeta.value);\n}\nfunction depDef(ctx, dep) {\n    // Note: the following fields have already been normalized out by provider_analyzer:\n    // - isAttribute, isHost\n    const expr = dep.isValue ? convertValueToOutputAst(ctx, dep.value) : tokenExpr(ctx, dep.token);\n    let flags = 0 /* None */;\n    if (dep.isSkipSelf) {\n        flags |= 1 /* SkipSelf */;\n    }\n    if (dep.isOptional) {\n        flags |= 2 /* Optional */;\n    }\n    if (dep.isSelf) {\n        flags |= 4 /* Self */;\n    }\n    if (dep.isValue) {\n        flags |= 8 /* Value */;\n    }\n    return flags === 0 /* None */ ? expr : literalArr([literal(flags), expr]);\n}\nfunction lifecycleHookToNodeFlag(lifecycleHook) {\n    let nodeFlag = 0 /* None */;\n    switch (lifecycleHook) {\n        case LifecycleHooks.AfterContentChecked:\n            nodeFlag = 2097152 /* AfterContentChecked */;\n            break;\n        case LifecycleHooks.AfterContentInit:\n            nodeFlag = 1048576 /* AfterContentInit */;\n            break;\n        case LifecycleHooks.AfterViewChecked:\n            nodeFlag = 8388608 /* AfterViewChecked */;\n            break;\n        case LifecycleHooks.AfterViewInit:\n            nodeFlag = 4194304 /* AfterViewInit */;\n            break;\n        case LifecycleHooks.DoCheck:\n            nodeFlag = 262144 /* DoCheck */;\n            break;\n        case LifecycleHooks.OnChanges:\n            nodeFlag = 524288 /* OnChanges */;\n            break;\n        case LifecycleHooks.OnDestroy:\n            nodeFlag = 131072 /* OnDestroy */;\n            break;\n        case LifecycleHooks.OnInit:\n            nodeFlag = 65536 /* OnInit */;\n            break;\n    }\n    return nodeFlag;\n}\nfunction componentFactoryResolverProviderDef(reflector, ctx, flags, entryComponents) {\n    const entryComponentFactories = entryComponents.map((entryComponent) => ctx.importExpr(entryComponent.componentFactory));\n    const token = createTokenForExternalReference(reflector, Identifiers.ComponentFactoryResolver);\n    const classMeta = {\n        diDeps: [\n            { isValue: true, value: literalArr(entryComponentFactories) },\n            { token: token, isSkipSelf: true, isOptional: true },\n            { token: createTokenForExternalReference(reflector, Identifiers.NgModuleRef) },\n        ],\n        lifecycleHooks: [],\n        reference: reflector.resolveExternalReference(Identifiers.CodegenComponentFactoryResolver)\n    };\n    const { providerExpr, flags: providerFlags, depsExpr } = singleProviderDef(ctx, flags, ProviderAstType.PrivateService, {\n        token,\n        multi: false,\n        useClass: classMeta,\n    });\n    return { providerExpr, flags: providerFlags, depsExpr, tokenExpr: tokenExpr(ctx, token) };\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass NgModuleCompileResult {\n    constructor(ngModuleFactoryVar) {\n        this.ngModuleFactoryVar = ngModuleFactoryVar;\n    }\n}\nconst LOG_VAR = variable('_l');\nclass NgModuleCompiler {\n    constructor(reflector) {\n        this.reflector = reflector;\n    }\n    compile(ctx, ngModuleMeta, extraProviders) {\n        const sourceSpan = typeSourceSpan('NgModule', ngModuleMeta.type);\n        const entryComponentFactories = ngModuleMeta.transitiveModule.entryComponents;\n        const bootstrapComponents = ngModuleMeta.bootstrapComponents;\n        const providerParser = new NgModuleProviderAnalyzer(this.reflector, ngModuleMeta, extraProviders, sourceSpan);\n        const providerDefs = [componentFactoryResolverProviderDef(this.reflector, ctx, 0 /* None */, entryComponentFactories)]\n            .concat(providerParser.parse().map((provider) => providerDef(ctx, provider)))\n            .map(({ providerExpr, depsExpr, flags, tokenExpr }) => {\n            return importExpr(Identifiers.moduleProviderDef).callFn([\n                literal(flags), tokenExpr, providerExpr, depsExpr\n            ]);\n        });\n        const ngModuleDef = importExpr(Identifiers.moduleDef).callFn([literalArr(providerDefs)]);\n        const ngModuleDefFactory = fn([new FnParam(LOG_VAR.name)], [new ReturnStatement(ngModuleDef)], INFERRED_TYPE);\n        const ngModuleFactoryVar = `${identifierName(ngModuleMeta.type)}NgFactory`;\n        this._createNgModuleFactory(ctx, ngModuleMeta.type.reference, importExpr(Identifiers.createModuleFactory).callFn([\n            ctx.importExpr(ngModuleMeta.type.reference),\n            literalArr(bootstrapComponents.map(id => ctx.importExpr(id.reference))),\n            ngModuleDefFactory\n        ]));\n        if (ngModuleMeta.id) {\n            const id = typeof ngModuleMeta.id === 'string' ? literal(ngModuleMeta.id) :\n                ctx.importExpr(ngModuleMeta.id);\n            const registerFactoryStmt = importExpr(Identifiers.RegisterModuleFactoryFn)\n                .callFn([id, variable(ngModuleFactoryVar)])\n                .toStmt();\n            ctx.statements.push(registerFactoryStmt);\n        }\n        return new NgModuleCompileResult(ngModuleFactoryVar);\n    }\n    createStub(ctx, ngModuleReference) {\n        this._createNgModuleFactory(ctx, ngModuleReference, NULL_EXPR);\n    }\n    _createNgModuleFactory(ctx, reference, value) {\n        const ngModuleFactoryVar = `${identifierName({ reference: reference })}NgFactory`;\n        const ngModuleFactoryStmt = variable(ngModuleFactoryVar)\n            .set(value)\n            .toDeclStmt(importType(Identifiers.NgModuleFactory, [expressionType(ctx.importExpr(reference))], [TypeModifier.Const]), [StmtModifier.Final, StmtModifier.Exported]);\n        ctx.statements.push(ngModuleFactoryStmt);\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Resolves types to {@link NgModule}.\n */\nclass NgModuleResolver {\n    constructor(_reflector) {\n        this._reflector = _reflector;\n    }\n    isNgModule(type) {\n        return this._reflector.annotations(type).some(createNgModule.isTypeOf);\n    }\n    resolve(type, throwIfNotFound = true) {\n        const ngModuleMeta = findLast(this._reflector.annotations(type), createNgModule.isTypeOf);\n        if (ngModuleMeta) {\n            return ngModuleMeta;\n        }\n        else {\n            if (throwIfNotFound) {\n                throw new Error(`No NgModule metadata found for '${stringify(type)}'.`);\n            }\n            return null;\n        }\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction debugOutputAstAsTypeScript(ast) {\n    const converter = new _TsEmitterVisitor();\n    const ctx = EmitterVisitorContext.createRoot();\n    const asts = Array.isArray(ast) ? ast : [ast];\n    asts.forEach((ast) => {\n        if (ast instanceof Statement) {\n            ast.visitStatement(converter, ctx);\n        }\n        else if (ast instanceof Expression) {\n            ast.visitExpression(converter, ctx);\n        }\n        else if (ast instanceof Type$1) {\n            ast.visitType(converter, ctx);\n        }\n        else {\n            throw new Error(`Don't know how to print debug info for ${ast}`);\n        }\n    });\n    return ctx.toSource();\n}\nclass TypeScriptEmitter {\n    emitStatementsAndContext(genFilePath, stmts, preamble = '', emitSourceMaps = true, referenceFilter, importFilter) {\n        const converter = new _TsEmitterVisitor(referenceFilter, importFilter);\n        const ctx = EmitterVisitorContext.createRoot();\n        converter.visitAllStatements(stmts, ctx);\n        const preambleLines = preamble ? preamble.split('\\n') : [];\n        converter.reexports.forEach((reexports, exportedModuleName) => {\n            const reexportsCode = reexports.map(reexport => `${reexport.name} as ${reexport.as}`).join(',');\n            preambleLines.push(`export {${reexportsCode}} from '${exportedModuleName}';`);\n        });\n        converter.importsWithPrefixes.forEach((prefix, importedModuleName) => {\n            // Note: can't write the real word for import as it screws up system.js auto detection...\n            preambleLines.push(`imp` +\n                `ort * as ${prefix} from '${importedModuleName}';`);\n        });\n        const sm = emitSourceMaps ?\n            ctx.toSourceMapGenerator(genFilePath, preambleLines.length).toJsComment() :\n            '';\n        const lines = [...preambleLines, ctx.toSource(), sm];\n        if (sm) {\n            // always add a newline at the end, as some tools have bugs without it.\n            lines.push('');\n        }\n        ctx.setPreambleLineCount(preambleLines.length);\n        return { sourceText: lines.join('\\n'), context: ctx };\n    }\n    emitStatements(genFilePath, stmts, preamble = '') {\n        return this.emitStatementsAndContext(genFilePath, stmts, preamble).sourceText;\n    }\n}\nclass _TsEmitterVisitor extends AbstractEmitterVisitor {\n    constructor(referenceFilter, importFilter) {\n        super(false);\n        this.referenceFilter = referenceFilter;\n        this.importFilter = importFilter;\n        this.typeExpression = 0;\n        this.importsWithPrefixes = new Map();\n        this.reexports = new Map();\n    }\n    visitType(t, ctx, defaultType = 'any') {\n        if (t) {\n            this.typeExpression++;\n            t.visitType(this, ctx);\n            this.typeExpression--;\n        }\n        else {\n            ctx.print(null, defaultType);\n        }\n    }\n    visitLiteralExpr(ast, ctx) {\n        const value = ast.value;\n        if (value == null && ast.type != INFERRED_TYPE) {\n            ctx.print(ast, `(${value} as any)`);\n            return null;\n        }\n        return super.visitLiteralExpr(ast, ctx);\n    }\n    // Temporary workaround to support strictNullCheck enabled consumers of ngc emit.\n    // In SNC mode, [] have the type never[], so we cast here to any[].\n    // TODO: narrow the cast to a more explicit type, or use a pattern that does not\n    // start with [].concat. see https://github.com/angular/angular/pull/11846\n    visitLiteralArrayExpr(ast, ctx) {\n        if (ast.entries.length === 0) {\n            ctx.print(ast, '(');\n        }\n        const result = super.visitLiteralArrayExpr(ast, ctx);\n        if (ast.entries.length === 0) {\n            ctx.print(ast, ' as any[])');\n        }\n        return result;\n    }\n    visitExternalExpr(ast, ctx) {\n        this._visitIdentifier(ast.value, ast.typeParams, ctx);\n        return null;\n    }\n    visitAssertNotNullExpr(ast, ctx) {\n        const result = super.visitAssertNotNullExpr(ast, ctx);\n        ctx.print(ast, '!');\n        return result;\n    }\n    visitDeclareVarStmt(stmt, ctx) {\n        if (stmt.hasModifier(StmtModifier.Exported) && stmt.value instanceof ExternalExpr &&\n            !stmt.type) {\n            // check for a reexport\n            const { name, moduleName } = stmt.value.value;\n            if (moduleName) {\n                let reexports = this.reexports.get(moduleName);\n                if (!reexports) {\n                    reexports = [];\n                    this.reexports.set(moduleName, reexports);\n                }\n                reexports.push({ name: name, as: stmt.name });\n                return null;\n            }\n        }\n        if (stmt.hasModifier(StmtModifier.Exported)) {\n            ctx.print(stmt, `export `);\n        }\n        if (stmt.hasModifier(StmtModifier.Final)) {\n            ctx.print(stmt, `const`);\n        }\n        else {\n            ctx.print(stmt, `var`);\n        }\n        ctx.print(stmt, ` ${stmt.name}`);\n        this._printColonType(stmt.type, ctx);\n        if (stmt.value) {\n            ctx.print(stmt, ` = `);\n            stmt.value.visitExpression(this, ctx);\n        }\n        ctx.println(stmt, `;`);\n        return null;\n    }\n    visitWrappedNodeExpr(ast, ctx) {\n        throw new Error('Cannot visit a WrappedNodeExpr when outputting Typescript.');\n    }\n    visitCastExpr(ast, ctx) {\n        ctx.print(ast, `(<`);\n        ast.type.visitType(this, ctx);\n        ctx.print(ast, `>`);\n        ast.value.visitExpression(this, ctx);\n        ctx.print(ast, `)`);\n        return null;\n    }\n    visitInstantiateExpr(ast, ctx) {\n        ctx.print(ast, `new `);\n        this.typeExpression++;\n        ast.classExpr.visitExpression(this, ctx);\n        this.typeExpression--;\n        ctx.print(ast, `(`);\n        this.visitAllExpressions(ast.args, ctx, ',');\n        ctx.print(ast, `)`);\n        return null;\n    }\n    visitDeclareClassStmt(stmt, ctx) {\n        ctx.pushClass(stmt);\n        if (stmt.hasModifier(StmtModifier.Exported)) {\n            ctx.print(stmt, `export `);\n        }\n        ctx.print(stmt, `class ${stmt.name}`);\n        if (stmt.parent != null) {\n            ctx.print(stmt, ` extends `);\n            this.typeExpression++;\n            stmt.parent.visitExpression(this, ctx);\n            this.typeExpression--;\n        }\n        ctx.println(stmt, ` {`);\n        ctx.incIndent();\n        stmt.fields.forEach((field) => this._visitClassField(field, ctx));\n        if (stmt.constructorMethod != null) {\n            this._visitClassConstructor(stmt, ctx);\n        }\n        stmt.getters.forEach((getter) => this._visitClassGetter(getter, ctx));\n        stmt.methods.forEach((method) => this._visitClassMethod(method, ctx));\n        ctx.decIndent();\n        ctx.println(stmt, `}`);\n        ctx.popClass();\n        return null;\n    }\n    _visitClassField(field, ctx) {\n        if (field.hasModifier(StmtModifier.Private)) {\n            // comment out as a workaround for #10967\n            ctx.print(null, `/*private*/ `);\n        }\n        if (field.hasModifier(StmtModifier.Static)) {\n            ctx.print(null, 'static ');\n        }\n        ctx.print(null, field.name);\n        this._printColonType(field.type, ctx);\n        if (field.initializer) {\n            ctx.print(null, ' = ');\n            field.initializer.visitExpression(this, ctx);\n        }\n        ctx.println(null, `;`);\n    }\n    _visitClassGetter(getter, ctx) {\n        if (getter.hasModifier(StmtModifier.Private)) {\n            ctx.print(null, `private `);\n        }\n        ctx.print(null, `get ${getter.name}()`);\n        this._printColonType(getter.type, ctx);\n        ctx.println(null, ` {`);\n        ctx.incIndent();\n        this.visitAllStatements(getter.body, ctx);\n        ctx.decIndent();\n        ctx.println(null, `}`);\n    }\n    _visitClassConstructor(stmt, ctx) {\n        ctx.print(stmt, `constructor(`);\n        this._visitParams(stmt.constructorMethod.params, ctx);\n        ctx.println(stmt, `) {`);\n        ctx.incIndent();\n        this.visitAllStatements(stmt.constructorMethod.body, ctx);\n        ctx.decIndent();\n        ctx.println(stmt, `}`);\n    }\n    _visitClassMethod(method, ctx) {\n        if (method.hasModifier(StmtModifier.Private)) {\n            ctx.print(null, `private `);\n        }\n        ctx.print(null, `${method.name}(`);\n        this._visitParams(method.params, ctx);\n        ctx.print(null, `)`);\n        this._printColonType(method.type, ctx, 'void');\n        ctx.println(null, ` {`);\n        ctx.incIndent();\n        this.visitAllStatements(method.body, ctx);\n        ctx.decIndent();\n        ctx.println(null, `}`);\n    }\n    visitFunctionExpr(ast, ctx) {\n        if (ast.name) {\n            ctx.print(ast, 'function ');\n            ctx.print(ast, ast.name);\n        }\n        ctx.print(ast, `(`);\n        this._visitParams(ast.params, ctx);\n        ctx.print(ast, `)`);\n        this._printColonType(ast.type, ctx, 'void');\n        if (!ast.name) {\n            ctx.print(ast, ` => `);\n        }\n        ctx.println(ast, '{');\n        ctx.incIndent();\n        this.visitAllStatements(ast.statements, ctx);\n        ctx.decIndent();\n        ctx.print(ast, `}`);\n        return null;\n    }\n    visitDeclareFunctionStmt(stmt, ctx) {\n        if (stmt.hasModifier(StmtModifier.Exported)) {\n            ctx.print(stmt, `export `);\n        }\n        ctx.print(stmt, `function ${stmt.name}(`);\n        this._visitParams(stmt.params, ctx);\n        ctx.print(stmt, `)`);\n        this._printColonType(stmt.type, ctx, 'void');\n        ctx.println(stmt, ` {`);\n        ctx.incIndent();\n        this.visitAllStatements(stmt.statements, ctx);\n        ctx.decIndent();\n        ctx.println(stmt, `}`);\n        return null;\n    }\n    visitTryCatchStmt(stmt, ctx) {\n        ctx.println(stmt, `try {`);\n        ctx.incIndent();\n        this.visitAllStatements(stmt.bodyStmts, ctx);\n        ctx.decIndent();\n        ctx.println(stmt, `} catch (${CATCH_ERROR_VAR$1.name}) {`);\n        ctx.incIndent();\n        const catchStmts = [CATCH_STACK_VAR$1.set(CATCH_ERROR_VAR$1.prop('stack', null)).toDeclStmt(null, [\n                StmtModifier.Final\n            ])].concat(stmt.catchStmts);\n        this.visitAllStatements(catchStmts, ctx);\n        ctx.decIndent();\n        ctx.println(stmt, `}`);\n        return null;\n    }\n    visitBuiltinType(type, ctx) {\n        let typeStr;\n        switch (type.name) {\n            case BuiltinTypeName.Bool:\n                typeStr = 'boolean';\n                break;\n            case BuiltinTypeName.Dynamic:\n                typeStr = 'any';\n                break;\n            case BuiltinTypeName.Function:\n                typeStr = 'Function';\n                break;\n            case BuiltinTypeName.Number:\n                typeStr = 'number';\n                break;\n            case BuiltinTypeName.Int:\n                typeStr = 'number';\n                break;\n            case BuiltinTypeName.String:\n                typeStr = 'string';\n                break;\n            case BuiltinTypeName.None:\n                typeStr = 'never';\n                break;\n            default:\n                throw new Error(`Unsupported builtin type ${type.name}`);\n        }\n        ctx.print(null, typeStr);\n        return null;\n    }\n    visitExpressionType(ast, ctx) {\n        ast.value.visitExpression(this, ctx);\n        if (ast.typeParams !== null) {\n            ctx.print(null, '<');\n            this.visitAllObjects(type => this.visitType(type, ctx), ast.typeParams, ctx, ',');\n            ctx.print(null, '>');\n        }\n        return null;\n    }\n    visitArrayType(type, ctx) {\n        this.visitType(type.of, ctx);\n        ctx.print(null, `[]`);\n        return null;\n    }\n    visitMapType(type, ctx) {\n        ctx.print(null, `{[key: string]:`);\n        this.visitType(type.valueType, ctx);\n        ctx.print(null, `}`);\n        return null;\n    }\n    getBuiltinMethodName(method) {\n        let name;\n        switch (method) {\n            case BuiltinMethod.ConcatArray:\n                name = 'concat';\n                break;\n            case BuiltinMethod.SubscribeObservable:\n                name = 'subscribe';\n                break;\n            case BuiltinMethod.Bind:\n                name = 'bind';\n                break;\n            default:\n                throw new Error(`Unknown builtin method: ${method}`);\n        }\n        return name;\n    }\n    _visitParams(params, ctx) {\n        this.visitAllObjects(param => {\n            ctx.print(null, param.name);\n            this._printColonType(param.type, ctx);\n        }, params, ctx, ',');\n    }\n    _visitIdentifier(value, typeParams, ctx) {\n        const { name, moduleName } = value;\n        if (this.referenceFilter && this.referenceFilter(value)) {\n            ctx.print(null, '(null as any)');\n            return;\n        }\n        if (moduleName && (!this.importFilter || !this.importFilter(value))) {\n            let prefix = this.importsWithPrefixes.get(moduleName);\n            if (prefix == null) {\n                prefix = `i${this.importsWithPrefixes.size}`;\n                this.importsWithPrefixes.set(moduleName, prefix);\n            }\n            ctx.print(null, `${prefix}.`);\n        }\n        ctx.print(null, name);\n        if (this.typeExpression > 0) {\n            // If we are in a type expression that refers to a generic type then supply\n            // the required type parameters. If there were not enough type parameters\n            // supplied, supply any as the type. Outside a type expression the reference\n            // should not supply type parameters and be treated as a simple value reference\n            // to the constructor function itself.\n            const suppliedParameters = typeParams || [];\n            if (suppliedParameters.length > 0) {\n                ctx.print(null, `<`);\n                this.visitAllObjects(type => type.visitType(this, ctx), typeParams, ctx, ',');\n                ctx.print(null, `>`);\n            }\n        }\n    }\n    _printColonType(type, ctx, defaultType) {\n        if (type !== INFERRED_TYPE) {\n            ctx.print(null, ':');\n            this.visitType(type, ctx, defaultType);\n        }\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Resolve a `Type` for {@link Pipe}.\n *\n * This interface can be overridden by the application developer to create custom behavior.\n *\n * See {@link Compiler}\n */\nclass PipeResolver {\n    constructor(_reflector) {\n        this._reflector = _reflector;\n    }\n    isPipe(type) {\n        const typeMetadata = this._reflector.annotations(resolveForwardRef(type));\n        return typeMetadata && typeMetadata.some(createPipe.isTypeOf);\n    }\n    /**\n     * Return {@link Pipe} for a given `Type`.\n     */\n    resolve(type, throwIfNotFound = true) {\n        const metas = this._reflector.annotations(resolveForwardRef(type));\n        if (metas) {\n            const annotation = findLast(metas, createPipe.isTypeOf);\n            if (annotation) {\n                return annotation;\n            }\n        }\n        if (throwIfNotFound) {\n            throw new Error(`No Pipe decorator found on ${stringify(type)}`);\n        }\n        return null;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Generates code that is used to type check templates.\n */\nclass TypeCheckCompiler {\n    constructor(options, reflector) {\n        this.options = options;\n        this.reflector = reflector;\n    }\n    /**\n     * Important notes:\n     * - This must not produce new `import` statements, but only refer to types outside\n     *   of the file via the variables provided via externalReferenceVars.\n     *   This allows Typescript to reuse the old program's structure as no imports have changed.\n     * - This must not produce any exports, as this would pollute the .d.ts file\n     *   and also violate the point above.\n     */\n    compileComponent(componentId, component, template, usedPipes, externalReferenceVars, ctx) {\n        const pipes = new Map();\n        usedPipes.forEach(p => pipes.set(p.name, p.type.reference));\n        let embeddedViewCount = 0;\n        const viewBuilderFactory = (parent, guards) => {\n            const embeddedViewIndex = embeddedViewCount++;\n            return new ViewBuilder(this.options, this.reflector, externalReferenceVars, parent, component.type.reference, component.isHost, embeddedViewIndex, pipes, guards, ctx, viewBuilderFactory);\n        };\n        const visitor = viewBuilderFactory(null, []);\n        visitor.visitAll([], template);\n        return visitor.build(componentId);\n    }\n}\nconst DYNAMIC_VAR_NAME = '_any';\nclass TypeCheckLocalResolver {\n    notifyImplicitReceiverUse() { }\n    getLocal(name) {\n        if (name === EventHandlerVars.event.name) {\n            // References to the event should not be type-checked.\n            // TODO(chuckj): determine a better type for the event.\n            return variable(DYNAMIC_VAR_NAME);\n        }\n        return null;\n    }\n}\nconst defaultResolver = new TypeCheckLocalResolver();\nclass ViewBuilder {\n    constructor(options, reflector, externalReferenceVars, parent, component, isHostComponent, embeddedViewIndex, pipes, guards, ctx, viewBuilderFactory) {\n        this.options = options;\n        this.reflector = reflector;\n        this.externalReferenceVars = externalReferenceVars;\n        this.parent = parent;\n        this.component = component;\n        this.isHostComponent = isHostComponent;\n        this.embeddedViewIndex = embeddedViewIndex;\n        this.pipes = pipes;\n        this.guards = guards;\n        this.ctx = ctx;\n        this.viewBuilderFactory = viewBuilderFactory;\n        this.refOutputVars = new Map();\n        this.variables = [];\n        this.children = [];\n        this.updates = [];\n        this.actions = [];\n    }\n    getOutputVar(type) {\n        let varName;\n        if (type === this.component && this.isHostComponent) {\n            varName = DYNAMIC_VAR_NAME;\n        }\n        else if (type instanceof StaticSymbol) {\n            varName = this.externalReferenceVars.get(type);\n        }\n        else {\n            varName = DYNAMIC_VAR_NAME;\n        }\n        if (!varName) {\n            throw new Error(`Illegal State: referring to a type without a variable ${JSON.stringify(type)}`);\n        }\n        return varName;\n    }\n    getTypeGuardExpressions(ast) {\n        const result = [...this.guards];\n        for (let directive of ast.directives) {\n            for (let input of directive.inputs) {\n                const guard = directive.directive.guards[input.directiveName];\n                if (guard) {\n                    const useIf = guard === 'UseIf';\n                    result.push({\n                        guard,\n                        useIf,\n                        expression: {\n                            context: this.component,\n                            value: input.value,\n                            sourceSpan: input.sourceSpan,\n                        },\n                    });\n                }\n            }\n        }\n        return result;\n    }\n    visitAll(variables, astNodes) {\n        this.variables = variables;\n        templateVisitAll(this, astNodes);\n    }\n    build(componentId, targetStatements = []) {\n        this.children.forEach((child) => child.build(componentId, targetStatements));\n        let viewStmts = [variable(DYNAMIC_VAR_NAME).set(NULL_EXPR).toDeclStmt(DYNAMIC_TYPE)];\n        let bindingCount = 0;\n        this.updates.forEach((expression) => {\n            const { sourceSpan, context, value } = this.preprocessUpdateExpression(expression);\n            const bindingId = `${bindingCount++}`;\n            const nameResolver = context === this.component ? this : defaultResolver;\n            const { stmts, currValExpr } = convertPropertyBinding(nameResolver, variable(this.getOutputVar(context)), value, bindingId, BindingForm.General);\n            stmts.push(new ExpressionStatement(currValExpr));\n            viewStmts.push(...stmts.map((stmt) => applySourceSpanToStatementIfNeeded(stmt, sourceSpan)));\n        });\n        this.actions.forEach(({ sourceSpan, context, value }) => {\n            const bindingId = `${bindingCount++}`;\n            const nameResolver = context === this.component ? this : defaultResolver;\n            const { stmts } = convertActionBinding(nameResolver, variable(this.getOutputVar(context)), value, bindingId);\n            viewStmts.push(...stmts.map((stmt) => applySourceSpanToStatementIfNeeded(stmt, sourceSpan)));\n        });\n        if (this.guards.length) {\n            let guardExpression = undefined;\n            for (const guard of this.guards) {\n                const { context, value } = this.preprocessUpdateExpression(guard.expression);\n                const bindingId = `${bindingCount++}`;\n                const nameResolver = context === this.component ? this : defaultResolver;\n                // We only support support simple expressions and ignore others as they\n                // are unlikely to affect type narrowing.\n                const { stmts, currValExpr } = convertPropertyBinding(nameResolver, variable(this.getOutputVar(context)), value, bindingId, BindingForm.TrySimple);\n                if (stmts.length == 0) {\n                    const guardClause = guard.useIf ? currValExpr : this.ctx.importExpr(guard.guard).callFn([currValExpr]);\n                    guardExpression = guardExpression ? guardExpression.and(guardClause) : guardClause;\n                }\n            }\n            if (guardExpression) {\n                viewStmts = [new IfStmt(guardExpression, viewStmts)];\n            }\n        }\n        const viewName = `_View_${componentId}_${this.embeddedViewIndex}`;\n        const viewFactory = new DeclareFunctionStmt(viewName, [], viewStmts);\n        targetStatements.push(viewFactory);\n        return targetStatements;\n    }\n    visitBoundText(ast, context) {\n        const astWithSource = ast.value;\n        const inter = astWithSource.ast;\n        inter.expressions.forEach((expr) => this.updates.push({ context: this.component, value: expr, sourceSpan: ast.sourceSpan }));\n    }\n    visitEmbeddedTemplate(ast, context) {\n        this.visitElementOrTemplate(ast);\n        // Note: The old view compiler used to use an `any` type\n        // for the context in any embedded view.\n        // We keep this behaivor behind a flag for now.\n        if (this.options.fullTemplateTypeCheck) {\n            // Find any applicable type guards. For example, NgIf has a type guard on ngIf\n            // (see NgIf.ngIfTypeGuard) that can be used to indicate that a template is only\n            // stamped out if ngIf is truthy so any bindings in the template can assume that,\n            // if a nullable type is used for ngIf, that expression is not null or undefined.\n            const guards = this.getTypeGuardExpressions(ast);\n            const childVisitor = this.viewBuilderFactory(this, guards);\n            this.children.push(childVisitor);\n            childVisitor.visitAll(ast.variables, ast.children);\n        }\n    }\n    visitElement(ast, context) {\n        this.visitElementOrTemplate(ast);\n        let inputDefs = [];\n        let updateRendererExpressions = [];\n        let outputDefs = [];\n        ast.inputs.forEach((inputAst) => {\n            this.updates.push({ context: this.component, value: inputAst.value, sourceSpan: inputAst.sourceSpan });\n        });\n        templateVisitAll(this, ast.children);\n    }\n    visitElementOrTemplate(ast) {\n        ast.directives.forEach((dirAst) => {\n            this.visitDirective(dirAst);\n        });\n        ast.references.forEach((ref) => {\n            let outputVarType = null;\n            // Note: The old view compiler used to use an `any` type\n            // for directives exposed via `exportAs`.\n            // We keep this behaivor behind a flag for now.\n            if (ref.value && ref.value.identifier && this.options.fullTemplateTypeCheck) {\n                outputVarType = ref.value.identifier.reference;\n            }\n            else {\n                outputVarType = BuiltinTypeName.Dynamic;\n            }\n            this.refOutputVars.set(ref.name, outputVarType);\n        });\n        ast.outputs.forEach((outputAst) => {\n            this.actions.push({ context: this.component, value: outputAst.handler, sourceSpan: outputAst.sourceSpan });\n        });\n    }\n    visitDirective(dirAst) {\n        const dirType = dirAst.directive.type.reference;\n        dirAst.inputs.forEach((input) => this.updates.push({ context: this.component, value: input.value, sourceSpan: input.sourceSpan }));\n        // Note: The old view compiler used to use an `any` type\n        // for expressions in host properties / events.\n        // We keep this behaivor behind a flag for now.\n        if (this.options.fullTemplateTypeCheck) {\n            dirAst.hostProperties.forEach((inputAst) => this.updates.push({ context: dirType, value: inputAst.value, sourceSpan: inputAst.sourceSpan }));\n            dirAst.hostEvents.forEach((hostEventAst) => this.actions.push({\n                context: dirType,\n                value: hostEventAst.handler,\n                sourceSpan: hostEventAst.sourceSpan\n            }));\n        }\n    }\n    notifyImplicitReceiverUse() { }\n    getLocal(name) {\n        if (name == EventHandlerVars.event.name) {\n            return variable(this.getOutputVar(BuiltinTypeName.Dynamic));\n        }\n        for (let currBuilder = this; currBuilder; currBuilder = currBuilder.parent) {\n            let outputVarType;\n            // check references\n            outputVarType = currBuilder.refOutputVars.get(name);\n            if (outputVarType == null) {\n                // check variables\n                const varAst = currBuilder.variables.find((varAst) => varAst.name === name);\n                if (varAst) {\n                    outputVarType = BuiltinTypeName.Dynamic;\n                }\n            }\n            if (outputVarType != null) {\n                return variable(this.getOutputVar(outputVarType));\n            }\n        }\n        return null;\n    }\n    pipeOutputVar(name) {\n        const pipe = this.pipes.get(name);\n        if (!pipe) {\n            throw new Error(`Illegal State: Could not find pipe ${name} in template of ${this.component}`);\n        }\n        return this.getOutputVar(pipe);\n    }\n    preprocessUpdateExpression(expression) {\n        return {\n            sourceSpan: expression.sourceSpan,\n            context: expression.context,\n            value: convertPropertyBindingBuiltins({\n                createLiteralArrayConverter: (argCount) => (args) => {\n                    const arr = literalArr(args);\n                    // Note: The old view compiler used to use an `any` type\n                    // for arrays.\n                    return this.options.fullTemplateTypeCheck ? arr : arr.cast(DYNAMIC_TYPE);\n                },\n                createLiteralMapConverter: (keys) => (values) => {\n                    const entries = keys.map((k, i) => ({\n                        key: k.key,\n                        value: values[i],\n                        quoted: k.quoted,\n                    }));\n                    const map = literalMap(entries);\n                    // Note: The old view compiler used to use an `any` type\n                    // for maps.\n                    return this.options.fullTemplateTypeCheck ? map : map.cast(DYNAMIC_TYPE);\n                },\n                createPipeConverter: (name, argCount) => (args) => {\n                    // Note: The old view compiler used to use an `any` type\n                    // for pipes.\n                    const pipeExpr = this.options.fullTemplateTypeCheck ?\n                        variable(this.pipeOutputVar(name)) :\n                        variable(this.getOutputVar(BuiltinTypeName.Dynamic));\n                    return pipeExpr.callMethod('transform', args);\n                },\n            }, expression.value)\n        };\n    }\n    visitNgContent(ast, context) { }\n    visitText(ast, context) { }\n    visitDirectiveProperty(ast, context) { }\n    visitReference(ast, context) { }\n    visitVariable(ast, context) { }\n    visitEvent(ast, context) { }\n    visitElementProperty(ast, context) { }\n    visitAttr(ast, context) { }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst CLASS_ATTR$1 = 'class';\nconst STYLE_ATTR = 'style';\nconst IMPLICIT_TEMPLATE_VAR = '\\$implicit';\nclass ViewCompileResult {\n    constructor(viewClassVar, rendererTypeVar) {\n        this.viewClassVar = viewClassVar;\n        this.rendererTypeVar = rendererTypeVar;\n    }\n}\nclass ViewCompiler {\n    constructor(_reflector) {\n        this._reflector = _reflector;\n    }\n    compileComponent(outputCtx, component, template, styles, usedPipes) {\n        let embeddedViewCount = 0;\n        let renderComponentVarName = undefined;\n        if (!component.isHost) {\n            const template = component.template;\n            const customRenderData = [];\n            if (template.animations && template.animations.length) {\n                customRenderData.push(new LiteralMapEntry('animation', convertValueToOutputAst(outputCtx, template.animations), true));\n            }\n            const renderComponentVar = variable(rendererTypeName(component.type.reference));\n            renderComponentVarName = renderComponentVar.name;\n            outputCtx.statements.push(renderComponentVar\n                .set(importExpr(Identifiers.createRendererType2).callFn([new LiteralMapExpr([\n                    new LiteralMapEntry('encapsulation', literal(template.encapsulation), false),\n                    new LiteralMapEntry('styles', styles, false),\n                    new LiteralMapEntry('data', new LiteralMapExpr(customRenderData), false)\n                ])]))\n                .toDeclStmt(importType(Identifiers.RendererType2), [StmtModifier.Final, StmtModifier.Exported]));\n        }\n        const viewBuilderFactory = (parent) => {\n            const embeddedViewIndex = embeddedViewCount++;\n            return new ViewBuilder$1(this._reflector, outputCtx, parent, component, embeddedViewIndex, usedPipes, viewBuilderFactory);\n        };\n        const visitor = viewBuilderFactory(null);\n        visitor.visitAll([], template);\n        outputCtx.statements.push(...visitor.build());\n        return new ViewCompileResult(visitor.viewName, renderComponentVarName);\n    }\n}\nconst LOG_VAR$1 = variable('_l');\nconst VIEW_VAR = variable('_v');\nconst CHECK_VAR = variable('_ck');\nconst COMP_VAR = variable('_co');\nconst EVENT_NAME_VAR = variable('en');\nconst ALLOW_DEFAULT_VAR = variable(`ad`);\nclass ViewBuilder$1 {\n    constructor(reflector, outputCtx, parent, component, embeddedViewIndex, usedPipes, viewBuilderFactory) {\n        this.reflector = reflector;\n        this.outputCtx = outputCtx;\n        this.parent = parent;\n        this.component = component;\n        this.embeddedViewIndex = embeddedViewIndex;\n        this.usedPipes = usedPipes;\n        this.viewBuilderFactory = viewBuilderFactory;\n        this.nodes = [];\n        this.purePipeNodeIndices = Object.create(null);\n        // Need Object.create so that we don't have builtin values...\n        this.refNodeIndices = Object.create(null);\n        this.variables = [];\n        this.children = [];\n        // TODO(tbosch): The old view compiler used to use an `any` type\n        // for the context in any embedded view. We keep this behaivor for now\n        // to be able to introduce the new view compiler without too many errors.\n        this.compType = this.embeddedViewIndex > 0 ?\n            DYNAMIC_TYPE :\n            expressionType(outputCtx.importExpr(this.component.type.reference));\n        this.viewName = viewClassName(this.component.type.reference, this.embeddedViewIndex);\n    }\n    visitAll(variables, astNodes) {\n        this.variables = variables;\n        // create the pipes for the pure pipes immediately, so that we know their indices.\n        if (!this.parent) {\n            this.usedPipes.forEach((pipe) => {\n                if (pipe.pure) {\n                    this.purePipeNodeIndices[pipe.name] = this._createPipe(null, pipe);\n                }\n            });\n        }\n        if (!this.parent) {\n            this.component.viewQueries.forEach((query, queryIndex) => {\n                // Note: queries start with id 1 so we can use the number in a Bloom filter!\n                const queryId = queryIndex + 1;\n                const bindingType = query.first ? 0 /* First */ : 1 /* All */;\n                const flags = 134217728 /* TypeViewQuery */ | calcStaticDynamicQueryFlags(query);\n                this.nodes.push(() => ({\n                    sourceSpan: null,\n                    nodeFlags: flags,\n                    nodeDef: importExpr(Identifiers.queryDef).callFn([\n                        literal(flags), literal(queryId),\n                        new LiteralMapExpr([new LiteralMapEntry(query.propertyName, literal(bindingType), false)])\n                    ])\n                }));\n            });\n        }\n        templateVisitAll(this, astNodes);\n        if (this.parent && (astNodes.length === 0 || needsAdditionalRootNode(astNodes))) {\n            // if the view is an embedded view, then we need to add an additional root node in some cases\n            this.nodes.push(() => ({\n                sourceSpan: null,\n                nodeFlags: 1 /* TypeElement */,\n                nodeDef: importExpr(Identifiers.anchorDef).callFn([\n                    literal(0 /* None */), NULL_EXPR, NULL_EXPR, literal(0)\n                ])\n            }));\n        }\n    }\n    build(targetStatements = []) {\n        this.children.forEach((child) => child.build(targetStatements));\n        const { updateRendererStmts, updateDirectivesStmts, nodeDefExprs } = this._createNodeExpressions();\n        const updateRendererFn = this._createUpdateFn(updateRendererStmts);\n        const updateDirectivesFn = this._createUpdateFn(updateDirectivesStmts);\n        let viewFlags = 0 /* None */;\n        if (!this.parent && this.component.changeDetection === ChangeDetectionStrategy.OnPush) {\n            viewFlags |= 2 /* OnPush */;\n        }\n        const viewFactory = new DeclareFunctionStmt(this.viewName, [new FnParam(LOG_VAR$1.name)], [new ReturnStatement(importExpr(Identifiers.viewDef).callFn([\n                literal(viewFlags),\n                literalArr(nodeDefExprs),\n                updateDirectivesFn,\n                updateRendererFn,\n            ]))], importType(Identifiers.ViewDefinition), this.embeddedViewIndex === 0 ? [StmtModifier.Exported] : []);\n        targetStatements.push(viewFactory);\n        return targetStatements;\n    }\n    _createUpdateFn(updateStmts) {\n        let updateFn;\n        if (updateStmts.length > 0) {\n            const preStmts = [];\n            if (!this.component.isHost && findReadVarNames(updateStmts).has(COMP_VAR.name)) {\n                preStmts.push(COMP_VAR.set(VIEW_VAR.prop('component')).toDeclStmt(this.compType));\n            }\n            updateFn = fn([\n                new FnParam(CHECK_VAR.name, INFERRED_TYPE),\n                new FnParam(VIEW_VAR.name, INFERRED_TYPE)\n            ], [...preStmts, ...updateStmts], INFERRED_TYPE);\n        }\n        else {\n            updateFn = NULL_EXPR;\n        }\n        return updateFn;\n    }\n    visitNgContent(ast, context) {\n        // ngContentDef(ngContentIndex: number, index: number): NodeDef;\n        this.nodes.push(() => ({\n            sourceSpan: ast.sourceSpan,\n            nodeFlags: 8 /* TypeNgContent */,\n            nodeDef: importExpr(Identifiers.ngContentDef)\n                .callFn([literal(ast.ngContentIndex), literal(ast.index)])\n        }));\n    }\n    visitText(ast, context) {\n        // Static text nodes have no check function\n        const checkIndex = -1;\n        this.nodes.push(() => ({\n            sourceSpan: ast.sourceSpan,\n            nodeFlags: 2 /* TypeText */,\n            nodeDef: importExpr(Identifiers.textDef).callFn([\n                literal(checkIndex),\n                literal(ast.ngContentIndex),\n                literalArr([literal(ast.value)]),\n            ])\n        }));\n    }\n    visitBoundText(ast, context) {\n        const nodeIndex = this.nodes.length;\n        // reserve the space in the nodeDefs array\n        this.nodes.push(null);\n        const astWithSource = ast.value;\n        const inter = astWithSource.ast;\n        const updateRendererExpressions = inter.expressions.map((expr, bindingIndex) => this._preprocessUpdateExpression({ nodeIndex, bindingIndex, sourceSpan: ast.sourceSpan, context: COMP_VAR, value: expr }));\n        // Check index is the same as the node index during compilation\n        // They might only differ at runtime\n        const checkIndex = nodeIndex;\n        this.nodes[nodeIndex] = () => ({\n            sourceSpan: ast.sourceSpan,\n            nodeFlags: 2 /* TypeText */,\n            nodeDef: importExpr(Identifiers.textDef).callFn([\n                literal(checkIndex),\n                literal(ast.ngContentIndex),\n                literalArr(inter.strings.map(s => literal(s))),\n            ]),\n            updateRenderer: updateRendererExpressions\n        });\n    }\n    visitEmbeddedTemplate(ast, context) {\n        const nodeIndex = this.nodes.length;\n        // reserve the space in the nodeDefs array\n        this.nodes.push(null);\n        const { flags, queryMatchesExpr, hostEvents } = this._visitElementOrTemplate(nodeIndex, ast);\n        const childVisitor = this.viewBuilderFactory(this);\n        this.children.push(childVisitor);\n        childVisitor.visitAll(ast.variables, ast.children);\n        const childCount = this.nodes.length - nodeIndex - 1;\n        // anchorDef(\n        //   flags: NodeFlags, matchedQueries: [string, QueryValueType][], ngContentIndex: number,\n        //   childCount: number, handleEventFn?: ElementHandleEventFn, templateFactory?:\n        //   ViewDefinitionFactory): NodeDef;\n        this.nodes[nodeIndex] = () => ({\n            sourceSpan: ast.sourceSpan,\n            nodeFlags: 1 /* TypeElement */ | flags,\n            nodeDef: importExpr(Identifiers.anchorDef).callFn([\n                literal(flags),\n                queryMatchesExpr,\n                literal(ast.ngContentIndex),\n                literal(childCount),\n                this._createElementHandleEventFn(nodeIndex, hostEvents),\n                variable(childVisitor.viewName),\n            ])\n        });\n    }\n    visitElement(ast, context) {\n        const nodeIndex = this.nodes.length;\n        // reserve the space in the nodeDefs array so we can add children\n        this.nodes.push(null);\n        // Using a null element name creates an anchor.\n        const elName = isNgContainer(ast.name) ? null : ast.name;\n        const { flags, usedEvents, queryMatchesExpr, hostBindings: dirHostBindings, hostEvents } = this._visitElementOrTemplate(nodeIndex, ast);\n        let inputDefs = [];\n        let updateRendererExpressions = [];\n        let outputDefs = [];\n        if (elName) {\n            const hostBindings = ast.inputs\n                .map((inputAst) => ({\n                context: COMP_VAR,\n                inputAst,\n                dirAst: null,\n            }))\n                .concat(dirHostBindings);\n            if (hostBindings.length) {\n                updateRendererExpressions =\n                    hostBindings.map((hostBinding, bindingIndex) => this._preprocessUpdateExpression({\n                        context: hostBinding.context,\n                        nodeIndex,\n                        bindingIndex,\n                        sourceSpan: hostBinding.inputAst.sourceSpan,\n                        value: hostBinding.inputAst.value\n                    }));\n                inputDefs = hostBindings.map(hostBinding => elementBindingDef(hostBinding.inputAst, hostBinding.dirAst));\n            }\n            outputDefs = usedEvents.map(([target, eventName]) => literalArr([literal(target), literal(eventName)]));\n        }\n        templateVisitAll(this, ast.children);\n        const childCount = this.nodes.length - nodeIndex - 1;\n        const compAst = ast.directives.find(dirAst => dirAst.directive.isComponent);\n        let compRendererType = NULL_EXPR;\n        let compView = NULL_EXPR;\n        if (compAst) {\n            compView = this.outputCtx.importExpr(compAst.directive.componentViewType);\n            compRendererType = this.outputCtx.importExpr(compAst.directive.rendererType);\n        }\n        // Check index is the same as the node index during compilation\n        // They might only differ at runtime\n        const checkIndex = nodeIndex;\n        this.nodes[nodeIndex] = () => ({\n            sourceSpan: ast.sourceSpan,\n            nodeFlags: 1 /* TypeElement */ | flags,\n            nodeDef: importExpr(Identifiers.elementDef).callFn([\n                literal(checkIndex),\n                literal(flags),\n                queryMatchesExpr,\n                literal(ast.ngContentIndex),\n                literal(childCount),\n                literal(elName),\n                elName ? fixedAttrsDef(ast) : NULL_EXPR,\n                inputDefs.length ? literalArr(inputDefs) : NULL_EXPR,\n                outputDefs.length ? literalArr(outputDefs) : NULL_EXPR,\n                this._createElementHandleEventFn(nodeIndex, hostEvents),\n                compView,\n                compRendererType,\n            ]),\n            updateRenderer: updateRendererExpressions\n        });\n    }\n    _visitElementOrTemplate(nodeIndex, ast) {\n        let flags = 0 /* None */;\n        if (ast.hasViewContainer) {\n            flags |= 16777216 /* EmbeddedViews */;\n        }\n        const usedEvents = new Map();\n        ast.outputs.forEach((event) => {\n            const { name, target } = elementEventNameAndTarget(event, null);\n            usedEvents.set(elementEventFullName(target, name), [target, name]);\n        });\n        ast.directives.forEach((dirAst) => {\n            dirAst.hostEvents.forEach((event) => {\n                const { name, target } = elementEventNameAndTarget(event, dirAst);\n                usedEvents.set(elementEventFullName(target, name), [target, name]);\n            });\n        });\n        const hostBindings = [];\n        const hostEvents = [];\n        this._visitComponentFactoryResolverProvider(ast.directives);\n        ast.providers.forEach(providerAst => {\n            let dirAst = undefined;\n            ast.directives.forEach(localDirAst => {\n                if (localDirAst.directive.type.reference === tokenReference(providerAst.token)) {\n                    dirAst = localDirAst;\n                }\n            });\n            if (dirAst) {\n                const { hostBindings: dirHostBindings, hostEvents: dirHostEvents } = this._visitDirective(providerAst, dirAst, ast.references, ast.queryMatches, usedEvents);\n                hostBindings.push(...dirHostBindings);\n                hostEvents.push(...dirHostEvents);\n            }\n            else {\n                this._visitProvider(providerAst, ast.queryMatches);\n            }\n        });\n        let queryMatchExprs = [];\n        ast.queryMatches.forEach((match) => {\n            let valueType = undefined;\n            if (tokenReference(match.value) ===\n                this.reflector.resolveExternalReference(Identifiers.ElementRef)) {\n                valueType = 0 /* ElementRef */;\n            }\n            else if (tokenReference(match.value) ===\n                this.reflector.resolveExternalReference(Identifiers.ViewContainerRef)) {\n                valueType = 3 /* ViewContainerRef */;\n            }\n            else if (tokenReference(match.value) ===\n                this.reflector.resolveExternalReference(Identifiers.TemplateRef)) {\n                valueType = 2 /* TemplateRef */;\n            }\n            if (valueType != null) {\n                queryMatchExprs.push(literalArr([literal(match.queryId), literal(valueType)]));\n            }\n        });\n        ast.references.forEach((ref) => {\n            let valueType = undefined;\n            if (!ref.value) {\n                valueType = 1 /* RenderElement */;\n            }\n            else if (tokenReference(ref.value) ===\n                this.reflector.resolveExternalReference(Identifiers.TemplateRef)) {\n                valueType = 2 /* TemplateRef */;\n            }\n            if (valueType != null) {\n                this.refNodeIndices[ref.name] = nodeIndex;\n                queryMatchExprs.push(literalArr([literal(ref.name), literal(valueType)]));\n            }\n        });\n        ast.outputs.forEach((outputAst) => {\n            hostEvents.push({ context: COMP_VAR, eventAst: outputAst, dirAst: null });\n        });\n        return {\n            flags,\n            usedEvents: Array.from(usedEvents.values()),\n            queryMatchesExpr: queryMatchExprs.length ? literalArr(queryMatchExprs) : NULL_EXPR,\n            hostBindings,\n            hostEvents: hostEvents\n        };\n    }\n    _visitDirective(providerAst, dirAst, refs, queryMatches, usedEvents) {\n        const nodeIndex = this.nodes.length;\n        // reserve the space in the nodeDefs array so we can add children\n        this.nodes.push(null);\n        dirAst.directive.queries.forEach((query, queryIndex) => {\n            const queryId = dirAst.contentQueryStartId + queryIndex;\n            const flags = 67108864 /* TypeContentQuery */ | calcStaticDynamicQueryFlags(query);\n            const bindingType = query.first ? 0 /* First */ : 1 /* All */;\n            this.nodes.push(() => ({\n                sourceSpan: dirAst.sourceSpan,\n                nodeFlags: flags,\n                nodeDef: importExpr(Identifiers.queryDef).callFn([\n                    literal(flags), literal(queryId),\n                    new LiteralMapExpr([new LiteralMapEntry(query.propertyName, literal(bindingType), false)])\n                ]),\n            }));\n        });\n        // Note: the operation below might also create new nodeDefs,\n        // but we don't want them to be a child of a directive,\n        // as they might be a provider/pipe on their own.\n        // I.e. we only allow queries as children of directives nodes.\n        const childCount = this.nodes.length - nodeIndex - 1;\n        let { flags, queryMatchExprs, providerExpr, depsExpr } = this._visitProviderOrDirective(providerAst, queryMatches);\n        refs.forEach((ref) => {\n            if (ref.value && tokenReference(ref.value) === tokenReference(providerAst.token)) {\n                this.refNodeIndices[ref.name] = nodeIndex;\n                queryMatchExprs.push(literalArr([literal(ref.name), literal(4 /* Provider */)]));\n            }\n        });\n        if (dirAst.directive.isComponent) {\n            flags |= 32768 /* Component */;\n        }\n        const inputDefs = dirAst.inputs.map((inputAst, inputIndex) => {\n            const mapValue = literalArr([literal(inputIndex), literal(inputAst.directiveName)]);\n            // Note: it's important to not quote the key so that we can capture renames by minifiers!\n            return new LiteralMapEntry(inputAst.directiveName, mapValue, false);\n        });\n        const outputDefs = [];\n        const dirMeta = dirAst.directive;\n        Object.keys(dirMeta.outputs).forEach((propName) => {\n            const eventName = dirMeta.outputs[propName];\n            if (usedEvents.has(eventName)) {\n                // Note: it's important to not quote the key so that we can capture renames by minifiers!\n                outputDefs.push(new LiteralMapEntry(propName, literal(eventName), false));\n            }\n        });\n        let updateDirectiveExpressions = [];\n        if (dirAst.inputs.length || (flags & (262144 /* DoCheck */ | 65536 /* OnInit */)) > 0) {\n            updateDirectiveExpressions =\n                dirAst.inputs.map((input, bindingIndex) => this._preprocessUpdateExpression({\n                    nodeIndex,\n                    bindingIndex,\n                    sourceSpan: input.sourceSpan,\n                    context: COMP_VAR,\n                    value: input.value\n                }));\n        }\n        const dirContextExpr = importExpr(Identifiers.nodeValue).callFn([VIEW_VAR, literal(nodeIndex)]);\n        const hostBindings = dirAst.hostProperties.map((inputAst) => ({\n            context: dirContextExpr,\n            dirAst,\n            inputAst,\n        }));\n        const hostEvents = dirAst.hostEvents.map((hostEventAst) => ({\n            context: dirContextExpr,\n            eventAst: hostEventAst,\n            dirAst,\n        }));\n        // Check index is the same as the node index during compilation\n        // They might only differ at runtime\n        const checkIndex = nodeIndex;\n        this.nodes[nodeIndex] = () => ({\n            sourceSpan: dirAst.sourceSpan,\n            nodeFlags: 16384 /* TypeDirective */ | flags,\n            nodeDef: importExpr(Identifiers.directiveDef).callFn([\n                literal(checkIndex),\n                literal(flags),\n                queryMatchExprs.length ? literalArr(queryMatchExprs) : NULL_EXPR,\n                literal(childCount),\n                providerExpr,\n                depsExpr,\n                inputDefs.length ? new LiteralMapExpr(inputDefs) : NULL_EXPR,\n                outputDefs.length ? new LiteralMapExpr(outputDefs) : NULL_EXPR,\n            ]),\n            updateDirectives: updateDirectiveExpressions,\n            directive: dirAst.directive.type,\n        });\n        return { hostBindings, hostEvents };\n    }\n    _visitProvider(providerAst, queryMatches) {\n        this._addProviderNode(this._visitProviderOrDirective(providerAst, queryMatches));\n    }\n    _visitComponentFactoryResolverProvider(directives) {\n        const componentDirMeta = directives.find(dirAst => dirAst.directive.isComponent);\n        if (componentDirMeta && componentDirMeta.directive.entryComponents.length) {\n            const { providerExpr, depsExpr, flags, tokenExpr } = componentFactoryResolverProviderDef(this.reflector, this.outputCtx, 8192 /* PrivateProvider */, componentDirMeta.directive.entryComponents);\n            this._addProviderNode({\n                providerExpr,\n                depsExpr,\n                flags,\n                tokenExpr,\n                queryMatchExprs: [],\n                sourceSpan: componentDirMeta.sourceSpan\n            });\n        }\n    }\n    _addProviderNode(data) {\n        // providerDef(\n        //   flags: NodeFlags, matchedQueries: [string, QueryValueType][], token:any,\n        //   value: any, deps: ([DepFlags, any] | any)[]): NodeDef;\n        this.nodes.push(() => ({\n            sourceSpan: data.sourceSpan,\n            nodeFlags: data.flags,\n            nodeDef: importExpr(Identifiers.providerDef).callFn([\n                literal(data.flags),\n                data.queryMatchExprs.length ? literalArr(data.queryMatchExprs) : NULL_EXPR,\n                data.tokenExpr, data.providerExpr, data.depsExpr\n            ])\n        }));\n    }\n    _visitProviderOrDirective(providerAst, queryMatches) {\n        let flags = 0 /* None */;\n        let queryMatchExprs = [];\n        queryMatches.forEach((match) => {\n            if (tokenReference(match.value) === tokenReference(providerAst.token)) {\n                queryMatchExprs.push(literalArr([literal(match.queryId), literal(4 /* Provider */)]));\n            }\n        });\n        const { providerExpr, depsExpr, flags: providerFlags, tokenExpr } = providerDef(this.outputCtx, providerAst);\n        return {\n            flags: flags | providerFlags,\n            queryMatchExprs,\n            providerExpr,\n            depsExpr,\n            tokenExpr,\n            sourceSpan: providerAst.sourceSpan\n        };\n    }\n    getLocal(name) {\n        if (name == EventHandlerVars.event.name) {\n            return EventHandlerVars.event;\n        }\n        let currViewExpr = VIEW_VAR;\n        for (let currBuilder = this; currBuilder; currBuilder = currBuilder.parent,\n            currViewExpr = currViewExpr.prop('parent').cast(DYNAMIC_TYPE)) {\n            // check references\n            const refNodeIndex = currBuilder.refNodeIndices[name];\n            if (refNodeIndex != null) {\n                return importExpr(Identifiers.nodeValue).callFn([currViewExpr, literal(refNodeIndex)]);\n            }\n            // check variables\n            const varAst = currBuilder.variables.find((varAst) => varAst.name === name);\n            if (varAst) {\n                const varValue = varAst.value || IMPLICIT_TEMPLATE_VAR;\n                return currViewExpr.prop('context').prop(varValue);\n            }\n        }\n        return null;\n    }\n    notifyImplicitReceiverUse() {\n        // Not needed in View Engine as View Engine walks through the generated\n        // expressions to figure out if the implicit receiver is used and needs\n        // to be generated as part of the pre-update statements.\n    }\n    _createLiteralArrayConverter(sourceSpan, argCount) {\n        if (argCount === 0) {\n            const valueExpr = importExpr(Identifiers.EMPTY_ARRAY);\n            return () => valueExpr;\n        }\n        const checkIndex = this.nodes.length;\n        this.nodes.push(() => ({\n            sourceSpan,\n            nodeFlags: 32 /* TypePureArray */,\n            nodeDef: importExpr(Identifiers.pureArrayDef).callFn([\n                literal(checkIndex),\n                literal(argCount),\n            ])\n        }));\n        return (args) => callCheckStmt(checkIndex, args);\n    }\n    _createLiteralMapConverter(sourceSpan, keys) {\n        if (keys.length === 0) {\n            const valueExpr = importExpr(Identifiers.EMPTY_MAP);\n            return () => valueExpr;\n        }\n        const map = literalMap(keys.map((e, i) => (Object.assign(Object.assign({}, e), { value: literal(i) }))));\n        const checkIndex = this.nodes.length;\n        this.nodes.push(() => ({\n            sourceSpan,\n            nodeFlags: 64 /* TypePureObject */,\n            nodeDef: importExpr(Identifiers.pureObjectDef).callFn([\n                literal(checkIndex),\n                map,\n            ])\n        }));\n        return (args) => callCheckStmt(checkIndex, args);\n    }\n    _createPipeConverter(expression, name, argCount) {\n        const pipe = this.usedPipes.find((pipeSummary) => pipeSummary.name === name);\n        if (pipe.pure) {\n            const checkIndex = this.nodes.length;\n            this.nodes.push(() => ({\n                sourceSpan: expression.sourceSpan,\n                nodeFlags: 128 /* TypePurePipe */,\n                nodeDef: importExpr(Identifiers.purePipeDef).callFn([\n                    literal(checkIndex),\n                    literal(argCount),\n                ])\n            }));\n            // find underlying pipe in the component view\n            let compViewExpr = VIEW_VAR;\n            let compBuilder = this;\n            while (compBuilder.parent) {\n                compBuilder = compBuilder.parent;\n                compViewExpr = compViewExpr.prop('parent').cast(DYNAMIC_TYPE);\n            }\n            const pipeNodeIndex = compBuilder.purePipeNodeIndices[name];\n            const pipeValueExpr = importExpr(Identifiers.nodeValue).callFn([compViewExpr, literal(pipeNodeIndex)]);\n            return (args) => callUnwrapValue(expression.nodeIndex, expression.bindingIndex, callCheckStmt(checkIndex, [pipeValueExpr].concat(args)));\n        }\n        else {\n            const nodeIndex = this._createPipe(expression.sourceSpan, pipe);\n            const nodeValueExpr = importExpr(Identifiers.nodeValue).callFn([VIEW_VAR, literal(nodeIndex)]);\n            return (args) => callUnwrapValue(expression.nodeIndex, expression.bindingIndex, nodeValueExpr.callMethod('transform', args));\n        }\n    }\n    _createPipe(sourceSpan, pipe) {\n        const nodeIndex = this.nodes.length;\n        let flags = 0 /* None */;\n        pipe.type.lifecycleHooks.forEach((lifecycleHook) => {\n            // for pipes, we only support ngOnDestroy\n            if (lifecycleHook === LifecycleHooks.OnDestroy) {\n                flags |= lifecycleHookToNodeFlag(lifecycleHook);\n            }\n        });\n        const depExprs = pipe.type.diDeps.map((diDep) => depDef(this.outputCtx, diDep));\n        // function pipeDef(\n        //   flags: NodeFlags, ctor: any, deps: ([DepFlags, any] | any)[]): NodeDef\n        this.nodes.push(() => ({\n            sourceSpan,\n            nodeFlags: 16 /* TypePipe */,\n            nodeDef: importExpr(Identifiers.pipeDef).callFn([\n                literal(flags), this.outputCtx.importExpr(pipe.type.reference), literalArr(depExprs)\n            ])\n        }));\n        return nodeIndex;\n    }\n    /**\n     * For the AST in `UpdateExpression.value`:\n     * - create nodes for pipes, literal arrays and, literal maps,\n     * - update the AST to replace pipes, literal arrays and, literal maps with calls to check fn.\n     *\n     * WARNING: This might create new nodeDefs (for pipes and literal arrays and literal maps)!\n     */\n    _preprocessUpdateExpression(expression) {\n        return {\n            nodeIndex: expression.nodeIndex,\n            bindingIndex: expression.bindingIndex,\n            sourceSpan: expression.sourceSpan,\n            context: expression.context,\n            value: convertPropertyBindingBuiltins({\n                createLiteralArrayConverter: (argCount) => this._createLiteralArrayConverter(expression.sourceSpan, argCount),\n                createLiteralMapConverter: (keys) => this._createLiteralMapConverter(expression.sourceSpan, keys),\n                createPipeConverter: (name, argCount) => this._createPipeConverter(expression, name, argCount)\n            }, expression.value)\n        };\n    }\n    _createNodeExpressions() {\n        const self = this;\n        let updateBindingCount = 0;\n        const updateRendererStmts = [];\n        const updateDirectivesStmts = [];\n        const nodeDefExprs = this.nodes.map((factory, nodeIndex) => {\n            const { nodeDef, nodeFlags, updateDirectives, updateRenderer, sourceSpan } = factory();\n            if (updateRenderer) {\n                updateRendererStmts.push(...createUpdateStatements(nodeIndex, sourceSpan, updateRenderer, false));\n            }\n            if (updateDirectives) {\n                updateDirectivesStmts.push(...createUpdateStatements(nodeIndex, sourceSpan, updateDirectives, (nodeFlags & (262144 /* DoCheck */ | 65536 /* OnInit */)) > 0));\n            }\n            // We use a comma expression to call the log function before\n            // the nodeDef function, but still use the result of the nodeDef function\n            // as the value.\n            // Note: We only add the logger to elements / text nodes,\n            // so we don't generate too much code.\n            const logWithNodeDef = nodeFlags & 3 /* CatRenderNode */ ?\n                new CommaExpr([LOG_VAR$1.callFn([]).callFn([]), nodeDef]) :\n                nodeDef;\n            return applySourceSpanToExpressionIfNeeded(logWithNodeDef, sourceSpan);\n        });\n        return { updateRendererStmts, updateDirectivesStmts, nodeDefExprs };\n        function createUpdateStatements(nodeIndex, sourceSpan, expressions, allowEmptyExprs) {\n            const updateStmts = [];\n            const exprs = expressions.map(({ sourceSpan, context, value }) => {\n                const bindingId = `${updateBindingCount++}`;\n                const nameResolver = context === COMP_VAR ? self : null;\n                const { stmts, currValExpr } = convertPropertyBinding(nameResolver, context, value, bindingId, BindingForm.General);\n                updateStmts.push(...stmts.map((stmt) => applySourceSpanToStatementIfNeeded(stmt, sourceSpan)));\n                return applySourceSpanToExpressionIfNeeded(currValExpr, sourceSpan);\n            });\n            if (expressions.length || allowEmptyExprs) {\n                updateStmts.push(applySourceSpanToStatementIfNeeded(callCheckStmt(nodeIndex, exprs).toStmt(), sourceSpan));\n            }\n            return updateStmts;\n        }\n    }\n    _createElementHandleEventFn(nodeIndex, handlers) {\n        const handleEventStmts = [];\n        let handleEventBindingCount = 0;\n        handlers.forEach(({ context, eventAst, dirAst }) => {\n            const bindingId = `${handleEventBindingCount++}`;\n            const nameResolver = context === COMP_VAR ? this : null;\n            const { stmts, allowDefault } = convertActionBinding(nameResolver, context, eventAst.handler, bindingId);\n            const trueStmts = stmts;\n            if (allowDefault) {\n                trueStmts.push(ALLOW_DEFAULT_VAR.set(allowDefault.and(ALLOW_DEFAULT_VAR)).toStmt());\n            }\n            const { target: eventTarget, name: eventName } = elementEventNameAndTarget(eventAst, dirAst);\n            const fullEventName = elementEventFullName(eventTarget, eventName);\n            handleEventStmts.push(applySourceSpanToStatementIfNeeded(new IfStmt(literal(fullEventName).identical(EVENT_NAME_VAR), trueStmts), eventAst.sourceSpan));\n        });\n        let handleEventFn;\n        if (handleEventStmts.length > 0) {\n            const preStmts = [ALLOW_DEFAULT_VAR.set(literal(true)).toDeclStmt(BOOL_TYPE)];\n            if (!this.component.isHost && findReadVarNames(handleEventStmts).has(COMP_VAR.name)) {\n                preStmts.push(COMP_VAR.set(VIEW_VAR.prop('component')).toDeclStmt(this.compType));\n            }\n            handleEventFn = fn([\n                new FnParam(VIEW_VAR.name, INFERRED_TYPE),\n                new FnParam(EVENT_NAME_VAR.name, INFERRED_TYPE),\n                new FnParam(EventHandlerVars.event.name, INFERRED_TYPE)\n            ], [...preStmts, ...handleEventStmts, new ReturnStatement(ALLOW_DEFAULT_VAR)], INFERRED_TYPE);\n        }\n        else {\n            handleEventFn = NULL_EXPR;\n        }\n        return handleEventFn;\n    }\n    visitDirective(ast, context) { }\n    visitDirectiveProperty(ast, context) { }\n    visitReference(ast, context) { }\n    visitVariable(ast, context) { }\n    visitEvent(ast, context) { }\n    visitElementProperty(ast, context) { }\n    visitAttr(ast, context) { }\n}\nfunction needsAdditionalRootNode(astNodes) {\n    const lastAstNode = astNodes[astNodes.length - 1];\n    if (lastAstNode instanceof EmbeddedTemplateAst) {\n        return lastAstNode.hasViewContainer;\n    }\n    if (lastAstNode instanceof ElementAst) {\n        if (isNgContainer(lastAstNode.name) && lastAstNode.children.length) {\n            return needsAdditionalRootNode(lastAstNode.children);\n        }\n        return lastAstNode.hasViewContainer;\n    }\n    return lastAstNode instanceof NgContentAst;\n}\nfunction elementBindingDef(inputAst, dirAst) {\n    const inputType = inputAst.type;\n    switch (inputType) {\n        case 1 /* Attribute */:\n            return literalArr([\n                literal(1 /* TypeElementAttribute */), literal(inputAst.name),\n                literal(inputAst.securityContext)\n            ]);\n        case 0 /* Property */:\n            return literalArr([\n                literal(8 /* TypeProperty */), literal(inputAst.name),\n                literal(inputAst.securityContext)\n            ]);\n        case 4 /* Animation */:\n            const bindingType = 8 /* TypeProperty */ |\n                (dirAst && dirAst.directive.isComponent ? 32 /* SyntheticHostProperty */ :\n                    16 /* SyntheticProperty */);\n            return literalArr([\n                literal(bindingType), literal('@' + inputAst.name), literal(inputAst.securityContext)\n            ]);\n        case 2 /* Class */:\n            return literalArr([literal(2 /* TypeElementClass */), literal(inputAst.name), NULL_EXPR]);\n        case 3 /* Style */:\n            return literalArr([\n                literal(4 /* TypeElementStyle */), literal(inputAst.name), literal(inputAst.unit)\n            ]);\n        default:\n            // This default case is not needed by TypeScript compiler, as the switch is exhaustive.\n            // However Closure Compiler does not understand that and reports an error in typed mode.\n            // The `throw new Error` below works around the problem, and the unexpected: never variable\n            // makes sure tsc still checks this code is unreachable.\n            const unexpected = inputType;\n            throw new Error(`unexpected ${unexpected}`);\n    }\n}\nfunction fixedAttrsDef(elementAst) {\n    const mapResult = Object.create(null);\n    elementAst.attrs.forEach(attrAst => {\n        mapResult[attrAst.name] = attrAst.value;\n    });\n    elementAst.directives.forEach(dirAst => {\n        Object.keys(dirAst.directive.hostAttributes).forEach(name => {\n            const value = dirAst.directive.hostAttributes[name];\n            const prevValue = mapResult[name];\n            mapResult[name] = prevValue != null ? mergeAttributeValue(name, prevValue, value) : value;\n        });\n    });\n    // Note: We need to sort to get a defined output order\n    // for tests and for caching generated artifacts...\n    return literalArr(Object.keys(mapResult).sort().map((attrName) => literalArr([literal(attrName), literal(mapResult[attrName])])));\n}\nfunction mergeAttributeValue(attrName, attrValue1, attrValue2) {\n    if (attrName == CLASS_ATTR$1 || attrName == STYLE_ATTR) {\n        return `${attrValue1} ${attrValue2}`;\n    }\n    else {\n        return attrValue2;\n    }\n}\nfunction callCheckStmt(nodeIndex, exprs) {\n    if (exprs.length > 10) {\n        return CHECK_VAR.callFn([VIEW_VAR, literal(nodeIndex), literal(1 /* Dynamic */), literalArr(exprs)]);\n    }\n    else {\n        return CHECK_VAR.callFn([VIEW_VAR, literal(nodeIndex), literal(0 /* Inline */), ...exprs]);\n    }\n}\nfunction callUnwrapValue(nodeIndex, bindingIdx, expr) {\n    return importExpr(Identifiers.unwrapValue).callFn([\n        VIEW_VAR, literal(nodeIndex), literal(bindingIdx), expr\n    ]);\n}\nfunction elementEventNameAndTarget(eventAst, dirAst) {\n    if (eventAst.isAnimation) {\n        return {\n            name: `@${eventAst.name}.${eventAst.phase}`,\n            target: dirAst && dirAst.directive.isComponent ? 'component' : null\n        };\n    }\n    else {\n        return eventAst;\n    }\n}\nfunction calcStaticDynamicQueryFlags(query) {\n    let flags = 0 /* None */;\n    // Note: We only make queries static that query for a single item and the user specifically\n    // set the to be static. This is because of backwards compatibility with the old view compiler...\n    if (query.first && query.static) {\n        flags |= 268435456 /* StaticQuery */;\n    }\n    else {\n        flags |= 536870912 /* DynamicQuery */;\n    }\n    return flags;\n}\nfunction elementEventFullName(target, name) {\n    return target ? `${target}:${name}` : name;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * A container for message extracted from the templates.\n */\nclass MessageBundle {\n    constructor(_htmlParser, _implicitTags, _implicitAttrs, _locale = null) {\n        this._htmlParser = _htmlParser;\n        this._implicitTags = _implicitTags;\n        this._implicitAttrs = _implicitAttrs;\n        this._locale = _locale;\n        this._messages = [];\n    }\n    updateFromTemplate(html, url, interpolationConfig) {\n        const htmlParserResult = this._htmlParser.parse(html, url, { tokenizeExpansionForms: true, interpolationConfig });\n        if (htmlParserResult.errors.length) {\n            return htmlParserResult.errors;\n        }\n        const i18nParserResult = extractMessages(htmlParserResult.rootNodes, interpolationConfig, this._implicitTags, this._implicitAttrs);\n        if (i18nParserResult.errors.length) {\n            return i18nParserResult.errors;\n        }\n        this._messages.push(...i18nParserResult.messages);\n        return [];\n    }\n    // Return the message in the internal format\n    // The public (serialized) format might be different, see the `write` method.\n    getMessages() {\n        return this._messages;\n    }\n    write(serializer, filterSources) {\n        const messages = {};\n        const mapperVisitor = new MapPlaceholderNames();\n        // Deduplicate messages based on their ID\n        this._messages.forEach(message => {\n            const id = serializer.digest(message);\n            if (!messages.hasOwnProperty(id)) {\n                messages[id] = message;\n            }\n            else {\n                messages[id].sources.push(...message.sources);\n            }\n        });\n        // Transform placeholder names using the serializer mapping\n        const msgList = Object.keys(messages).map(id => {\n            const mapper = serializer.createNameMapper(messages[id]);\n            const src = messages[id];\n            const nodes = mapper ? mapperVisitor.convert(src.nodes, mapper) : src.nodes;\n            let transformedMessage = new Message(nodes, {}, {}, src.meaning, src.description, id);\n            transformedMessage.sources = src.sources;\n            if (filterSources) {\n                transformedMessage.sources.forEach((source) => source.filePath = filterSources(source.filePath));\n            }\n            return transformedMessage;\n        });\n        return serializer.write(msgList, this._locale);\n    }\n}\n// Transform an i18n AST by renaming the placeholder nodes with the given mapper\nclass MapPlaceholderNames extends CloneVisitor {\n    convert(nodes, mapper) {\n        return mapper ? nodes.map(n => n.visit(this, mapper)) : nodes;\n    }\n    visitTagPlaceholder(ph, mapper) {\n        const startName = mapper.toPublicName(ph.startName);\n        const closeName = ph.closeName ? mapper.toPublicName(ph.closeName) : ph.closeName;\n        const children = ph.children.map(n => n.visit(this, mapper));\n        return new TagPlaceholder(ph.tag, ph.attrs, startName, closeName, children, ph.isVoid, ph.sourceSpan, ph.startSourceSpan, ph.endSourceSpan);\n    }\n    visitPlaceholder(ph, mapper) {\n        return new Placeholder(ph.value, mapper.toPublicName(ph.name), ph.sourceSpan);\n    }\n    visitIcuPlaceholder(ph, mapper) {\n        return new IcuPlaceholder(ph.value, mapper.toPublicName(ph.name), ph.sourceSpan);\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass GeneratedFile {\n    constructor(srcFileUrl, genFileUrl, sourceOrStmts) {\n        this.srcFileUrl = srcFileUrl;\n        this.genFileUrl = genFileUrl;\n        if (typeof sourceOrStmts === 'string') {\n            this.source = sourceOrStmts;\n            this.stmts = null;\n        }\n        else {\n            this.source = null;\n            this.stmts = sourceOrStmts;\n        }\n    }\n    isEquivalent(other) {\n        if (this.genFileUrl !== other.genFileUrl) {\n            return false;\n        }\n        if (this.source) {\n            return this.source === other.source;\n        }\n        if (other.stmts == null) {\n            return false;\n        }\n        // Note: the constructor guarantees that if this.source is not filled,\n        // then this.stmts is.\n        return areAllEquivalent(this.stmts, other.stmts);\n    }\n}\nfunction toTypeScript(file, preamble = '') {\n    if (!file.stmts) {\n        throw new Error(`Illegal state: No stmts present on GeneratedFile ${file.genFileUrl}`);\n    }\n    return new TypeScriptEmitter().emitStatements(file.genFileUrl, file.stmts, preamble);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction listLazyRoutes(moduleMeta, reflector) {\n    const allLazyRoutes = [];\n    for (const { provider, module } of moduleMeta.transitiveModule.providers) {\n        if (tokenReference(provider.token) === reflector.ROUTES) {\n            const loadChildren = _collectLoadChildren(provider.useValue);\n            for (const route of loadChildren) {\n                allLazyRoutes.push(parseLazyRoute(route, reflector, module.reference));\n            }\n        }\n    }\n    return allLazyRoutes;\n}\nfunction _collectLoadChildren(routes, target = []) {\n    if (typeof routes === 'string') {\n        target.push(routes);\n    }\n    else if (Array.isArray(routes)) {\n        for (const route of routes) {\n            _collectLoadChildren(route, target);\n        }\n    }\n    else if (routes.loadChildren) {\n        _collectLoadChildren(routes.loadChildren, target);\n    }\n    else if (routes.children) {\n        _collectLoadChildren(routes.children, target);\n    }\n    return target;\n}\nfunction parseLazyRoute(route, reflector, module) {\n    const [routePath, routeName] = route.split('#');\n    const referencedModule = reflector.resolveExternalReference({\n        moduleName: routePath,\n        name: routeName,\n    }, module ? module.filePath : undefined);\n    return { route: route, module: module || referencedModule, referencedModule };\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst TS = /^(?!.*\\.d\\.ts$).*\\.ts$/;\nclass ResolvedStaticSymbol {\n    constructor(symbol, metadata) {\n        this.symbol = symbol;\n        this.metadata = metadata;\n    }\n}\nconst SUPPORTED_SCHEMA_VERSION = 4;\n/**\n * This class is responsible for loading metadata per symbol,\n * and normalizing references between symbols.\n *\n * Internally, it only uses symbols without members,\n * and deduces the values for symbols with members based\n * on these symbols.\n */\nclass StaticSymbolResolver {\n    constructor(host, staticSymbolCache, summaryResolver, errorRecorder) {\n        this.host = host;\n        this.staticSymbolCache = staticSymbolCache;\n        this.summaryResolver = summaryResolver;\n        this.errorRecorder = errorRecorder;\n        this.metadataCache = new Map();\n        // Note: this will only contain StaticSymbols without members!\n        this.resolvedSymbols = new Map();\n        // Note: this will only contain StaticSymbols without members!\n        this.importAs = new Map();\n        this.symbolResourcePaths = new Map();\n        this.symbolFromFile = new Map();\n        this.knownFileNameToModuleNames = new Map();\n    }\n    resolveSymbol(staticSymbol) {\n        if (staticSymbol.members.length > 0) {\n            return this._resolveSymbolMembers(staticSymbol);\n        }\n        // Note: always ask for a summary first,\n        // as we might have read shallow metadata via a .d.ts file\n        // for the symbol.\n        const resultFromSummary = this._resolveSymbolFromSummary(staticSymbol);\n        if (resultFromSummary) {\n            return resultFromSummary;\n        }\n        const resultFromCache = this.resolvedSymbols.get(staticSymbol);\n        if (resultFromCache) {\n            return resultFromCache;\n        }\n        // Note: Some users use libraries that were not compiled with ngc, i.e. they don't\n        // have summaries, only .d.ts files. So we always need to check both, the summary\n        // and metadata.\n        this._createSymbolsOf(staticSymbol.filePath);\n        return this.resolvedSymbols.get(staticSymbol);\n    }\n    /**\n     * getImportAs produces a symbol that can be used to import the given symbol.\n     * The import might be different than the symbol if the symbol is exported from\n     * a library with a summary; in which case we want to import the symbol from the\n     * ngfactory re-export instead of directly to avoid introducing a direct dependency\n     * on an otherwise indirect dependency.\n     *\n     * @param staticSymbol the symbol for which to generate a import symbol\n     */\n    getImportAs(staticSymbol, useSummaries = true) {\n        if (staticSymbol.members.length) {\n            const baseSymbol = this.getStaticSymbol(staticSymbol.filePath, staticSymbol.name);\n            const baseImportAs = this.getImportAs(baseSymbol, useSummaries);\n            return baseImportAs ?\n                this.getStaticSymbol(baseImportAs.filePath, baseImportAs.name, staticSymbol.members) :\n                null;\n        }\n        const summarizedFileName = stripSummaryForJitFileSuffix(staticSymbol.filePath);\n        if (summarizedFileName !== staticSymbol.filePath) {\n            const summarizedName = stripSummaryForJitNameSuffix(staticSymbol.name);\n            const baseSymbol = this.getStaticSymbol(summarizedFileName, summarizedName, staticSymbol.members);\n            const baseImportAs = this.getImportAs(baseSymbol, useSummaries);\n            return baseImportAs ? this.getStaticSymbol(summaryForJitFileName(baseImportAs.filePath), summaryForJitName(baseImportAs.name), baseSymbol.members) :\n                null;\n        }\n        let result = (useSummaries && this.summaryResolver.getImportAs(staticSymbol)) || null;\n        if (!result) {\n            result = this.importAs.get(staticSymbol);\n        }\n        return result;\n    }\n    /**\n     * getResourcePath produces the path to the original location of the symbol and should\n     * be used to determine the relative location of resource references recorded in\n     * symbol metadata.\n     */\n    getResourcePath(staticSymbol) {\n        return this.symbolResourcePaths.get(staticSymbol) || staticSymbol.filePath;\n    }\n    /**\n     * getTypeArity returns the number of generic type parameters the given symbol\n     * has. If the symbol is not a type the result is null.\n     */\n    getTypeArity(staticSymbol) {\n        // If the file is a factory/ngsummary file, don't resolve the symbol as doing so would\n        // cause the metadata for an factory/ngsummary file to be loaded which doesn't exist.\n        // All references to generated classes must include the correct arity whenever\n        // generating code.\n        if (isGeneratedFile(staticSymbol.filePath)) {\n            return null;\n        }\n        let resolvedSymbol = unwrapResolvedMetadata(this.resolveSymbol(staticSymbol));\n        while (resolvedSymbol && resolvedSymbol.metadata instanceof StaticSymbol) {\n            resolvedSymbol = unwrapResolvedMetadata(this.resolveSymbol(resolvedSymbol.metadata));\n        }\n        return (resolvedSymbol && resolvedSymbol.metadata && resolvedSymbol.metadata.arity) || null;\n    }\n    getKnownModuleName(filePath) {\n        return this.knownFileNameToModuleNames.get(filePath) || null;\n    }\n    recordImportAs(sourceSymbol, targetSymbol) {\n        sourceSymbol.assertNoMembers();\n        targetSymbol.assertNoMembers();\n        this.importAs.set(sourceSymbol, targetSymbol);\n    }\n    recordModuleNameForFileName(fileName, moduleName) {\n        this.knownFileNameToModuleNames.set(fileName, moduleName);\n    }\n    /**\n     * Invalidate all information derived from the given file and return the\n     * static symbols contained in the file.\n     *\n     * @param fileName the file to invalidate\n     */\n    invalidateFile(fileName) {\n        this.metadataCache.delete(fileName);\n        const symbols = this.symbolFromFile.get(fileName);\n        if (!symbols) {\n            return [];\n        }\n        this.symbolFromFile.delete(fileName);\n        for (const symbol of symbols) {\n            this.resolvedSymbols.delete(symbol);\n            this.importAs.delete(symbol);\n            this.symbolResourcePaths.delete(symbol);\n        }\n        return symbols;\n    }\n    /** @internal */\n    ignoreErrorsFor(cb) {\n        const recorder = this.errorRecorder;\n        this.errorRecorder = () => { };\n        try {\n            return cb();\n        }\n        finally {\n            this.errorRecorder = recorder;\n        }\n    }\n    _resolveSymbolMembers(staticSymbol) {\n        const members = staticSymbol.members;\n        const baseResolvedSymbol = this.resolveSymbol(this.getStaticSymbol(staticSymbol.filePath, staticSymbol.name));\n        if (!baseResolvedSymbol) {\n            return null;\n        }\n        let baseMetadata = unwrapResolvedMetadata(baseResolvedSymbol.metadata);\n        if (baseMetadata instanceof StaticSymbol) {\n            return new ResolvedStaticSymbol(staticSymbol, this.getStaticSymbol(baseMetadata.filePath, baseMetadata.name, members));\n        }\n        else if (baseMetadata && baseMetadata.__symbolic === 'class') {\n            if (baseMetadata.statics && members.length === 1) {\n                return new ResolvedStaticSymbol(staticSymbol, baseMetadata.statics[members[0]]);\n            }\n        }\n        else {\n            let value = baseMetadata;\n            for (let i = 0; i < members.length && value; i++) {\n                value = value[members[i]];\n            }\n            return new ResolvedStaticSymbol(staticSymbol, value);\n        }\n        return null;\n    }\n    _resolveSymbolFromSummary(staticSymbol) {\n        const summary = this.summaryResolver.resolveSummary(staticSymbol);\n        return summary ? new ResolvedStaticSymbol(staticSymbol, summary.metadata) : null;\n    }\n    /**\n     * getStaticSymbol produces a Type whose metadata is known but whose implementation is not loaded.\n     * All types passed to the StaticResolver should be pseudo-types returned by this method.\n     *\n     * @param declarationFile the absolute path of the file where the symbol is declared\n     * @param name the name of the type.\n     * @param members a symbol for a static member of the named type\n     */\n    getStaticSymbol(declarationFile, name, members) {\n        return this.staticSymbolCache.get(declarationFile, name, members);\n    }\n    /**\n     * hasDecorators checks a file's metadata for the presence of decorators without evaluating the\n     * metadata.\n     *\n     * @param filePath the absolute path to examine for decorators.\n     * @returns true if any class in the file has a decorator.\n     */\n    hasDecorators(filePath) {\n        const metadata = this.getModuleMetadata(filePath);\n        if (metadata['metadata']) {\n            return Object.keys(metadata['metadata']).some((metadataKey) => {\n                const entry = metadata['metadata'][metadataKey];\n                return entry && entry.__symbolic === 'class' && entry.decorators;\n            });\n        }\n        return false;\n    }\n    getSymbolsOf(filePath) {\n        const summarySymbols = this.summaryResolver.getSymbolsOf(filePath);\n        if (summarySymbols) {\n            return summarySymbols;\n        }\n        // Note: Some users use libraries that were not compiled with ngc, i.e. they don't\n        // have summaries, only .d.ts files, but `summaryResolver.isLibraryFile` returns true.\n        this._createSymbolsOf(filePath);\n        return this.symbolFromFile.get(filePath) || [];\n    }\n    _createSymbolsOf(filePath) {\n        if (this.symbolFromFile.has(filePath)) {\n            return;\n        }\n        const resolvedSymbols = [];\n        const metadata = this.getModuleMetadata(filePath);\n        if (metadata['importAs']) {\n            // Index bundle indices should use the importAs module name defined\n            // in the bundle.\n            this.knownFileNameToModuleNames.set(filePath, metadata['importAs']);\n        }\n        // handle the symbols in one of the re-export location\n        if (metadata['exports']) {\n            for (const moduleExport of metadata['exports']) {\n                // handle the symbols in the list of explicitly re-exported symbols.\n                if (moduleExport.export) {\n                    moduleExport.export.forEach((exportSymbol) => {\n                        let symbolName;\n                        if (typeof exportSymbol === 'string') {\n                            symbolName = exportSymbol;\n                        }\n                        else {\n                            symbolName = exportSymbol.as;\n                        }\n                        symbolName = unescapeIdentifier(symbolName);\n                        let symName = symbolName;\n                        if (typeof exportSymbol !== 'string') {\n                            symName = unescapeIdentifier(exportSymbol.name);\n                        }\n                        const resolvedModule = this.resolveModule(moduleExport.from, filePath);\n                        if (resolvedModule) {\n                            const targetSymbol = this.getStaticSymbol(resolvedModule, symName);\n                            const sourceSymbol = this.getStaticSymbol(filePath, symbolName);\n                            resolvedSymbols.push(this.createExport(sourceSymbol, targetSymbol));\n                        }\n                    });\n                }\n                else {\n                    // Handle the symbols loaded by 'export *' directives.\n                    const resolvedModule = this.resolveModule(moduleExport.from, filePath);\n                    if (resolvedModule && resolvedModule !== filePath) {\n                        const nestedExports = this.getSymbolsOf(resolvedModule);\n                        nestedExports.forEach((targetSymbol) => {\n                            const sourceSymbol = this.getStaticSymbol(filePath, targetSymbol.name);\n                            resolvedSymbols.push(this.createExport(sourceSymbol, targetSymbol));\n                        });\n                    }\n                }\n            }\n        }\n        // handle the actual metadata. Has to be after the exports\n        // as there might be collisions in the names, and we want the symbols\n        // of the current module to win ofter reexports.\n        if (metadata['metadata']) {\n            // handle direct declarations of the symbol\n            const topLevelSymbolNames = new Set(Object.keys(metadata['metadata']).map(unescapeIdentifier));\n            const origins = metadata['origins'] || {};\n            Object.keys(metadata['metadata']).forEach((metadataKey) => {\n                const symbolMeta = metadata['metadata'][metadataKey];\n                const name = unescapeIdentifier(metadataKey);\n                const symbol = this.getStaticSymbol(filePath, name);\n                const origin = origins.hasOwnProperty(metadataKey) && origins[metadataKey];\n                if (origin) {\n                    // If the symbol is from a bundled index, use the declaration location of the\n                    // symbol so relative references (such as './my.html') will be calculated\n                    // correctly.\n                    const originFilePath = this.resolveModule(origin, filePath);\n                    if (!originFilePath) {\n                        this.reportError(new Error(`Couldn't resolve original symbol for ${origin} from ${this.host.getOutputName(filePath)}`));\n                    }\n                    else {\n                        this.symbolResourcePaths.set(symbol, originFilePath);\n                    }\n                }\n                resolvedSymbols.push(this.createResolvedSymbol(symbol, filePath, topLevelSymbolNames, symbolMeta));\n            });\n        }\n        const uniqueSymbols = new Set();\n        for (const resolvedSymbol of resolvedSymbols) {\n            this.resolvedSymbols.set(resolvedSymbol.symbol, resolvedSymbol);\n            uniqueSymbols.add(resolvedSymbol.symbol);\n        }\n        this.symbolFromFile.set(filePath, Array.from(uniqueSymbols));\n    }\n    createResolvedSymbol(sourceSymbol, topLevelPath, topLevelSymbolNames, metadata) {\n        // For classes that don't have Angular summaries / metadata,\n        // we only keep their arity, but nothing else\n        // (e.g. their constructor parameters).\n        // We do this to prevent introducing deep imports\n        // as we didn't generate .ngfactory.ts files with proper reexports.\n        const isTsFile = TS.test(sourceSymbol.filePath);\n        if (this.summaryResolver.isLibraryFile(sourceSymbol.filePath) && !isTsFile && metadata &&\n            metadata['__symbolic'] === 'class') {\n            const transformedMeta = { __symbolic: 'class', arity: metadata.arity };\n            return new ResolvedStaticSymbol(sourceSymbol, transformedMeta);\n        }\n        let _originalFileMemo;\n        const getOriginalName = () => {\n            if (!_originalFileMemo) {\n                // Guess what the original file name is from the reference. If it has a `.d.ts` extension\n                // replace it with `.ts`. If it already has `.ts` just leave it in place. If it doesn't have\n                // .ts or .d.ts, append `.ts'. Also, if it is in `node_modules`, trim the `node_module`\n                // location as it is not important to finding the file.\n                _originalFileMemo =\n                    this.host.getOutputName(topLevelPath.replace(/((\\.ts)|(\\.d\\.ts)|)$/, '.ts')\n                        .replace(/^.*node_modules[/\\\\]/, ''));\n            }\n            return _originalFileMemo;\n        };\n        const self = this;\n        class ReferenceTransformer extends ValueTransformer {\n            visitStringMap(map, functionParams) {\n                const symbolic = map['__symbolic'];\n                if (symbolic === 'function') {\n                    const oldLen = functionParams.length;\n                    functionParams.push(...(map['parameters'] || []));\n                    const result = super.visitStringMap(map, functionParams);\n                    functionParams.length = oldLen;\n                    return result;\n                }\n                else if (symbolic === 'reference') {\n                    const module = map['module'];\n                    const name = map['name'] ? unescapeIdentifier(map['name']) : map['name'];\n                    if (!name) {\n                        return null;\n                    }\n                    let filePath;\n                    if (module) {\n                        filePath = self.resolveModule(module, sourceSymbol.filePath);\n                        if (!filePath) {\n                            return {\n                                __symbolic: 'error',\n                                message: `Could not resolve ${module} relative to ${self.host.getMetadataFor(sourceSymbol.filePath)}.`,\n                                line: map['line'],\n                                character: map['character'],\n                                fileName: getOriginalName()\n                            };\n                        }\n                        return {\n                            __symbolic: 'resolved',\n                            symbol: self.getStaticSymbol(filePath, name),\n                            line: map['line'],\n                            character: map['character'],\n                            fileName: getOriginalName()\n                        };\n                    }\n                    else if (functionParams.indexOf(name) >= 0) {\n                        // reference to a function parameter\n                        return { __symbolic: 'reference', name: name };\n                    }\n                    else {\n                        if (topLevelSymbolNames.has(name)) {\n                            return self.getStaticSymbol(topLevelPath, name);\n                        }\n                        // ambient value\n                        null;\n                    }\n                }\n                else if (symbolic === 'error') {\n                    return Object.assign(Object.assign({}, map), { fileName: getOriginalName() });\n                }\n                else {\n                    return super.visitStringMap(map, functionParams);\n                }\n            }\n        }\n        const transformedMeta = visitValue(metadata, new ReferenceTransformer(), []);\n        let unwrappedTransformedMeta = unwrapResolvedMetadata(transformedMeta);\n        if (unwrappedTransformedMeta instanceof StaticSymbol) {\n            return this.createExport(sourceSymbol, unwrappedTransformedMeta);\n        }\n        return new ResolvedStaticSymbol(sourceSymbol, transformedMeta);\n    }\n    createExport(sourceSymbol, targetSymbol) {\n        sourceSymbol.assertNoMembers();\n        targetSymbol.assertNoMembers();\n        if (this.summaryResolver.isLibraryFile(sourceSymbol.filePath) &&\n            this.summaryResolver.isLibraryFile(targetSymbol.filePath)) {\n            // This case is for an ng library importing symbols from a plain ts library\n            // transitively.\n            // Note: We rely on the fact that we discover symbols in the direction\n            // from source files to library files\n            this.importAs.set(targetSymbol, this.getImportAs(sourceSymbol) || sourceSymbol);\n        }\n        return new ResolvedStaticSymbol(sourceSymbol, targetSymbol);\n    }\n    reportError(error, context, path) {\n        if (this.errorRecorder) {\n            this.errorRecorder(error, (context && context.filePath) || path);\n        }\n        else {\n            throw error;\n        }\n    }\n    /**\n     * @param module an absolute path to a module file.\n     */\n    getModuleMetadata(module) {\n        let moduleMetadata = this.metadataCache.get(module);\n        if (!moduleMetadata) {\n            const moduleMetadatas = this.host.getMetadataFor(module);\n            if (moduleMetadatas) {\n                let maxVersion = -1;\n                moduleMetadatas.forEach((md) => {\n                    if (md && md['version'] > maxVersion) {\n                        maxVersion = md['version'];\n                        moduleMetadata = md;\n                    }\n                });\n            }\n            if (!moduleMetadata) {\n                moduleMetadata =\n                    { __symbolic: 'module', version: SUPPORTED_SCHEMA_VERSION, module: module, metadata: {} };\n            }\n            if (moduleMetadata['version'] != SUPPORTED_SCHEMA_VERSION) {\n                const errorMessage = moduleMetadata['version'] == 2 ?\n                    `Unsupported metadata version ${moduleMetadata['version']} for module ${module}. This module should be compiled with a newer version of ngc` :\n                    `Metadata version mismatch for module ${this.host.getOutputName(module)}, found version ${moduleMetadata['version']}, expected ${SUPPORTED_SCHEMA_VERSION}`;\n                this.reportError(new Error(errorMessage));\n            }\n            this.metadataCache.set(module, moduleMetadata);\n        }\n        return moduleMetadata;\n    }\n    getSymbolByModule(module, symbolName, containingFile) {\n        const filePath = this.resolveModule(module, containingFile);\n        if (!filePath) {\n            this.reportError(new Error(`Could not resolve module ${module}${containingFile ? ' relative to ' + this.host.getOutputName(containingFile) : ''}`));\n            return this.getStaticSymbol(`ERROR:${module}`, symbolName);\n        }\n        return this.getStaticSymbol(filePath, symbolName);\n    }\n    resolveModule(module, containingFile) {\n        try {\n            return this.host.moduleNameToFileName(module, containingFile);\n        }\n        catch (e) {\n            console.error(`Could not resolve module '${module}' relative to file ${containingFile}`);\n            this.reportError(e, undefined, containingFile);\n        }\n        return null;\n    }\n}\n// Remove extra underscore from escaped identifier.\n// See https://github.com/Microsoft/TypeScript/blob/master/src/compiler/utilities.ts\nfunction unescapeIdentifier(identifier) {\n    return identifier.startsWith('___') ? identifier.substr(1) : identifier;\n}\nfunction unwrapResolvedMetadata(metadata) {\n    if (metadata && metadata.__symbolic === 'resolved') {\n        return metadata.symbol;\n    }\n    return metadata;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction serializeSummaries(srcFileName, forJitCtx, summaryResolver, symbolResolver, symbols, types, createExternalSymbolReexports = false) {\n    const toJsonSerializer = new ToJsonSerializer(symbolResolver, summaryResolver, srcFileName);\n    // for symbols, we use everything except for the class metadata itself\n    // (we keep the statics though), as the class metadata is contained in the\n    // CompileTypeSummary.\n    symbols.forEach((resolvedSymbol) => toJsonSerializer.addSummary({ symbol: resolvedSymbol.symbol, metadata: resolvedSymbol.metadata }));\n    // Add type summaries.\n    types.forEach(({ summary, metadata }) => {\n        toJsonSerializer.addSummary({ symbol: summary.type.reference, metadata: undefined, type: summary });\n    });\n    const { json, exportAs } = toJsonSerializer.serialize(createExternalSymbolReexports);\n    if (forJitCtx) {\n        const forJitSerializer = new ForJitSerializer(forJitCtx, symbolResolver, summaryResolver);\n        types.forEach(({ summary, metadata }) => {\n            forJitSerializer.addSourceType(summary, metadata);\n        });\n        toJsonSerializer.unprocessedSymbolSummariesBySymbol.forEach((summary) => {\n            if (summaryResolver.isLibraryFile(summary.symbol.filePath) && summary.type) {\n                forJitSerializer.addLibType(summary.type);\n            }\n        });\n        forJitSerializer.serialize(exportAs);\n    }\n    return { json, exportAs };\n}\nfunction deserializeSummaries(symbolCache, summaryResolver, libraryFileName, json) {\n    const deserializer = new FromJsonDeserializer(symbolCache, summaryResolver);\n    return deserializer.deserialize(libraryFileName, json);\n}\nfunction createForJitStub(outputCtx, reference) {\n    return createSummaryForJitFunction(outputCtx, reference, NULL_EXPR);\n}\nfunction createSummaryForJitFunction(outputCtx, reference, value) {\n    const fnName = summaryForJitName(reference.name);\n    outputCtx.statements.push(fn([], [new ReturnStatement(value)], new ArrayType(DYNAMIC_TYPE)).toDeclStmt(fnName, [\n        StmtModifier.Final, StmtModifier.Exported\n    ]));\n}\nclass ToJsonSerializer extends ValueTransformer {\n    constructor(symbolResolver, summaryResolver, srcFileName) {\n        super();\n        this.symbolResolver = symbolResolver;\n        this.summaryResolver = summaryResolver;\n        this.srcFileName = srcFileName;\n        // Note: This only contains symbols without members.\n        this.symbols = [];\n        this.indexBySymbol = new Map();\n        this.reexportedBy = new Map();\n        // This now contains a `__symbol: number` in the place of\n        // StaticSymbols, but otherwise has the same shape as the original objects.\n        this.processedSummaryBySymbol = new Map();\n        this.processedSummaries = [];\n        this.unprocessedSymbolSummariesBySymbol = new Map();\n        this.moduleName = symbolResolver.getKnownModuleName(srcFileName);\n    }\n    addSummary(summary) {\n        let unprocessedSummary = this.unprocessedSymbolSummariesBySymbol.get(summary.symbol);\n        let processedSummary = this.processedSummaryBySymbol.get(summary.symbol);\n        if (!unprocessedSummary) {\n            unprocessedSummary = { symbol: summary.symbol, metadata: undefined };\n            this.unprocessedSymbolSummariesBySymbol.set(summary.symbol, unprocessedSummary);\n            processedSummary = { symbol: this.processValue(summary.symbol, 0 /* None */) };\n            this.processedSummaries.push(processedSummary);\n            this.processedSummaryBySymbol.set(summary.symbol, processedSummary);\n        }\n        if (!unprocessedSummary.metadata && summary.metadata) {\n            let metadata = summary.metadata || {};\n            if (metadata.__symbolic === 'class') {\n                // For classes, we keep everything except their class decorators.\n                // We need to keep e.g. the ctor args, method names, method decorators\n                // so that the class can be extended in another compilation unit.\n                // We don't keep the class decorators as\n                // 1) they refer to data\n                //   that should not cause a rebuild of downstream compilation units\n                //   (e.g. inline templates of @Component, or @NgModule.declarations)\n                // 2) their data is already captured in TypeSummaries, e.g. DirectiveSummary.\n                const clone = {};\n                Object.keys(metadata).forEach((propName) => {\n                    if (propName !== 'decorators') {\n                        clone[propName] = metadata[propName];\n                    }\n                });\n                metadata = clone;\n            }\n            else if (isCall(metadata)) {\n                if (!isFunctionCall(metadata) && !isMethodCallOnVariable(metadata)) {\n                    // Don't store complex calls as we won't be able to simplify them anyways later on.\n                    metadata = {\n                        __symbolic: 'error',\n                        message: 'Complex function calls are not supported.',\n                    };\n                }\n            }\n            // Note: We need to keep storing ctor calls for e.g.\n            // `export const x = new InjectionToken(...)`\n            unprocessedSummary.metadata = metadata;\n            processedSummary.metadata = this.processValue(metadata, 1 /* ResolveValue */);\n            if (metadata instanceof StaticSymbol &&\n                this.summaryResolver.isLibraryFile(metadata.filePath)) {\n                const declarationSymbol = this.symbols[this.indexBySymbol.get(metadata)];\n                if (!isLoweredSymbol(declarationSymbol.name)) {\n                    // Note: symbols that were introduced during codegen in the user file can have a reexport\n                    // if a user used `export *`. However, we can't rely on this as tsickle will change\n                    // `export *` into named exports, using only the information from the typechecker.\n                    // As we introduce the new symbols after typecheck, Tsickle does not know about them,\n                    // and omits them when expanding `export *`.\n                    // So we have to keep reexporting these symbols manually via .ngfactory files.\n                    this.reexportedBy.set(declarationSymbol, summary.symbol);\n                }\n            }\n        }\n        if (!unprocessedSummary.type && summary.type) {\n            unprocessedSummary.type = summary.type;\n            // Note: We don't add the summaries of all referenced symbols as for the ResolvedSymbols,\n            // as the type summaries already contain the transitive data that they require\n            // (in a minimal way).\n            processedSummary.type = this.processValue(summary.type, 0 /* None */);\n            // except for reexported directives / pipes, so we need to store\n            // their summaries explicitly.\n            if (summary.type.summaryKind === CompileSummaryKind.NgModule) {\n                const ngModuleSummary = summary.type;\n                ngModuleSummary.exportedDirectives.concat(ngModuleSummary.exportedPipes).forEach((id) => {\n                    const symbol = id.reference;\n                    if (this.summaryResolver.isLibraryFile(symbol.filePath) &&\n                        !this.unprocessedSymbolSummariesBySymbol.has(symbol)) {\n                        const summary = this.summaryResolver.resolveSummary(symbol);\n                        if (summary) {\n                            this.addSummary(summary);\n                        }\n                    }\n                });\n            }\n        }\n    }\n    /**\n     * @param createExternalSymbolReexports Whether external static symbols should be re-exported.\n     * This can be enabled if external symbols should be re-exported by the current module in\n     * order to avoid dynamically generated module dependencies which can break strict dependency\n     * enforcements (as in Google3). Read more here: https://github.com/angular/angular/issues/25644\n     */\n    serialize(createExternalSymbolReexports) {\n        const exportAs = [];\n        const json = JSON.stringify({\n            moduleName: this.moduleName,\n            summaries: this.processedSummaries,\n            symbols: this.symbols.map((symbol, index) => {\n                symbol.assertNoMembers();\n                let importAs = undefined;\n                if (this.summaryResolver.isLibraryFile(symbol.filePath)) {\n                    const reexportSymbol = this.reexportedBy.get(symbol);\n                    if (reexportSymbol) {\n                        // In case the given external static symbol is already manually exported by the\n                        // user, we just proxy the external static symbol reference to the manual export.\n                        // This ensures that the AOT compiler imports the external symbol through the\n                        // user export and does not introduce another dependency which is not needed.\n                        importAs = this.indexBySymbol.get(reexportSymbol);\n                    }\n                    else if (createExternalSymbolReexports) {\n                        // In this case, the given external static symbol is *not* manually exported by\n                        // the user, and we manually create a re-export in the factory file so that we\n                        // don't introduce another module dependency. This is useful when running within\n                        // Bazel so that the AOT compiler does not introduce any module dependencies\n                        // which can break the strict dependency enforcement. (e.g. as in Google3)\n                        // Read more about this here: https://github.com/angular/angular/issues/25644\n                        const summary = this.unprocessedSymbolSummariesBySymbol.get(symbol);\n                        if (!summary || !summary.metadata || summary.metadata.__symbolic !== 'interface') {\n                            importAs = `${symbol.name}_${index}`;\n                            exportAs.push({ symbol, exportAs: importAs });\n                        }\n                    }\n                }\n                return {\n                    __symbol: index,\n                    name: symbol.name,\n                    filePath: this.summaryResolver.toSummaryFileName(symbol.filePath, this.srcFileName),\n                    importAs: importAs\n                };\n            })\n        });\n        return { json, exportAs };\n    }\n    processValue(value, flags) {\n        return visitValue(value, this, flags);\n    }\n    visitOther(value, context) {\n        if (value instanceof StaticSymbol) {\n            let baseSymbol = this.symbolResolver.getStaticSymbol(value.filePath, value.name);\n            const index = this.visitStaticSymbol(baseSymbol, context);\n            return { __symbol: index, members: value.members };\n        }\n    }\n    /**\n     * Strip line and character numbers from ngsummaries.\n     * Emitting them causes white spaces changes to retrigger upstream\n     * recompilations in bazel.\n     * TODO: find out a way to have line and character numbers in errors without\n     * excessive recompilation in bazel.\n     */\n    visitStringMap(map, context) {\n        if (map['__symbolic'] === 'resolved') {\n            return visitValue(map['symbol'], this, context);\n        }\n        if (map['__symbolic'] === 'error') {\n            delete map['line'];\n            delete map['character'];\n        }\n        return super.visitStringMap(map, context);\n    }\n    /**\n     * Returns null if the options.resolveValue is true, and the summary for the symbol\n     * resolved to a type or could not be resolved.\n     */\n    visitStaticSymbol(baseSymbol, flags) {\n        let index = this.indexBySymbol.get(baseSymbol);\n        let summary = null;\n        if (flags & 1 /* ResolveValue */ &&\n            this.summaryResolver.isLibraryFile(baseSymbol.filePath)) {\n            if (this.unprocessedSymbolSummariesBySymbol.has(baseSymbol)) {\n                // the summary for this symbol was already added\n                // -> nothing to do.\n                return index;\n            }\n            summary = this.loadSummary(baseSymbol);\n            if (summary && summary.metadata instanceof StaticSymbol) {\n                // The summary is a reexport\n                index = this.visitStaticSymbol(summary.metadata, flags);\n                // reset the summary as it is just a reexport, so we don't want to store it.\n                summary = null;\n            }\n        }\n        else if (index != null) {\n            // Note: == on purpose to compare with undefined!\n            // No summary and the symbol is already added -> nothing to do.\n            return index;\n        }\n        // Note: == on purpose to compare with undefined!\n        if (index == null) {\n            index = this.symbols.length;\n            this.symbols.push(baseSymbol);\n        }\n        this.indexBySymbol.set(baseSymbol, index);\n        if (summary) {\n            this.addSummary(summary);\n        }\n        return index;\n    }\n    loadSummary(symbol) {\n        let summary = this.summaryResolver.resolveSummary(symbol);\n        if (!summary) {\n            // some symbols might originate from a plain typescript library\n            // that just exported .d.ts and .metadata.json files, i.e. where no summary\n            // files were created.\n            const resolvedSymbol = this.symbolResolver.resolveSymbol(symbol);\n            if (resolvedSymbol) {\n                summary = { symbol: resolvedSymbol.symbol, metadata: resolvedSymbol.metadata };\n            }\n        }\n        return summary;\n    }\n}\nclass ForJitSerializer {\n    constructor(outputCtx, symbolResolver, summaryResolver) {\n        this.outputCtx = outputCtx;\n        this.symbolResolver = symbolResolver;\n        this.summaryResolver = summaryResolver;\n        this.data = [];\n    }\n    addSourceType(summary, metadata) {\n        this.data.push({ summary, metadata, isLibrary: false });\n    }\n    addLibType(summary) {\n        this.data.push({ summary, metadata: null, isLibrary: true });\n    }\n    serialize(exportAsArr) {\n        const exportAsBySymbol = new Map();\n        for (const { symbol, exportAs } of exportAsArr) {\n            exportAsBySymbol.set(symbol, exportAs);\n        }\n        const ngModuleSymbols = new Set();\n        for (const { summary, metadata, isLibrary } of this.data) {\n            if (summary.summaryKind === CompileSummaryKind.NgModule) {\n                // collect the symbols that refer to NgModule classes.\n                // Note: we can't just rely on `summary.type.summaryKind` to determine this as\n                // we don't add the summaries of all referenced symbols when we serialize type summaries.\n                // See serializeSummaries for details.\n                ngModuleSymbols.add(summary.type.reference);\n                const modSummary = summary;\n                for (const mod of modSummary.modules) {\n                    ngModuleSymbols.add(mod.reference);\n                }\n            }\n            if (!isLibrary) {\n                const fnName = summaryForJitName(summary.type.reference.name);\n                createSummaryForJitFunction(this.outputCtx, summary.type.reference, this.serializeSummaryWithDeps(summary, metadata));\n            }\n        }\n        ngModuleSymbols.forEach((ngModuleSymbol) => {\n            if (this.summaryResolver.isLibraryFile(ngModuleSymbol.filePath)) {\n                let exportAs = exportAsBySymbol.get(ngModuleSymbol) || ngModuleSymbol.name;\n                const jitExportAsName = summaryForJitName(exportAs);\n                this.outputCtx.statements.push(variable(jitExportAsName)\n                    .set(this.serializeSummaryRef(ngModuleSymbol))\n                    .toDeclStmt(null, [StmtModifier.Exported]));\n            }\n        });\n    }\n    serializeSummaryWithDeps(summary, metadata) {\n        const expressions = [this.serializeSummary(summary)];\n        let providers = [];\n        if (metadata instanceof CompileNgModuleMetadata) {\n            expressions.push(...\n            // For directives / pipes, we only add the declared ones,\n            // and rely on transitively importing NgModules to get the transitive\n            // summaries.\n            metadata.declaredDirectives.concat(metadata.declaredPipes)\n                .map(type => type.reference)\n                // For modules,\n                // we also add the summaries for modules\n                // from libraries.\n                // This is ok as we produce reexports for all transitive modules.\n                .concat(metadata.transitiveModule.modules.map(type => type.reference)\n                .filter(ref => ref !== metadata.type.reference))\n                .map((ref) => this.serializeSummaryRef(ref)));\n            // Note: We don't use `NgModuleSummary.providers`, as that one is transitive,\n            // and we already have transitive modules.\n            providers = metadata.providers;\n        }\n        else if (summary.summaryKind === CompileSummaryKind.Directive) {\n            const dirSummary = summary;\n            providers = dirSummary.providers.concat(dirSummary.viewProviders);\n        }\n        // Note: We can't just refer to the `ngsummary.ts` files for `useClass` providers (as we do for\n        // declaredDirectives / declaredPipes), as we allow\n        // providers without ctor arguments to skip the `@Injectable` decorator,\n        // i.e. we didn't generate .ngsummary.ts files for these.\n        expressions.push(...providers.filter(provider => !!provider.useClass).map(provider => this.serializeSummary({\n            summaryKind: CompileSummaryKind.Injectable,\n            type: provider.useClass\n        })));\n        return literalArr(expressions);\n    }\n    serializeSummaryRef(typeSymbol) {\n        const jitImportedSymbol = this.symbolResolver.getStaticSymbol(summaryForJitFileName(typeSymbol.filePath), summaryForJitName(typeSymbol.name));\n        return this.outputCtx.importExpr(jitImportedSymbol);\n    }\n    serializeSummary(data) {\n        const outputCtx = this.outputCtx;\n        class Transformer {\n            visitArray(arr, context) {\n                return literalArr(arr.map(entry => visitValue(entry, this, context)));\n            }\n            visitStringMap(map, context) {\n                return new LiteralMapExpr(Object.keys(map).map((key) => new LiteralMapEntry(key, visitValue(map[key], this, context), false)));\n            }\n            visitPrimitive(value, context) {\n                return literal(value);\n            }\n            visitOther(value, context) {\n                if (value instanceof StaticSymbol) {\n                    return outputCtx.importExpr(value);\n                }\n                else {\n                    throw new Error(`Illegal State: Encountered value ${value}`);\n                }\n            }\n        }\n        return visitValue(data, new Transformer(), null);\n    }\n}\nclass FromJsonDeserializer extends ValueTransformer {\n    constructor(symbolCache, summaryResolver) {\n        super();\n        this.symbolCache = symbolCache;\n        this.summaryResolver = summaryResolver;\n    }\n    deserialize(libraryFileName, json) {\n        const data = JSON.parse(json);\n        const allImportAs = [];\n        this.symbols = data.symbols.map((serializedSymbol) => this.symbolCache.get(this.summaryResolver.fromSummaryFileName(serializedSymbol.filePath, libraryFileName), serializedSymbol.name));\n        data.symbols.forEach((serializedSymbol, index) => {\n            const symbol = this.symbols[index];\n            const importAs = serializedSymbol.importAs;\n            if (typeof importAs === 'number') {\n                allImportAs.push({ symbol, importAs: this.symbols[importAs] });\n            }\n            else if (typeof importAs === 'string') {\n                allImportAs.push({ symbol, importAs: this.symbolCache.get(ngfactoryFilePath(libraryFileName), importAs) });\n            }\n        });\n        const summaries = visitValue(data.summaries, this, null);\n        return { moduleName: data.moduleName, summaries, importAs: allImportAs };\n    }\n    visitStringMap(map, context) {\n        if ('__symbol' in map) {\n            const baseSymbol = this.symbols[map['__symbol']];\n            const members = map['members'];\n            return members.length ? this.symbolCache.get(baseSymbol.filePath, baseSymbol.name, members) :\n                baseSymbol;\n        }\n        else {\n            return super.visitStringMap(map, context);\n        }\n    }\n}\nfunction isCall(metadata) {\n    return metadata && metadata.__symbolic === 'call';\n}\nfunction isFunctionCall(metadata) {\n    return isCall(metadata) && unwrapResolvedMetadata(metadata.expression) instanceof StaticSymbol;\n}\nfunction isMethodCallOnVariable(metadata) {\n    return isCall(metadata) && metadata.expression && metadata.expression.__symbolic === 'select' &&\n        unwrapResolvedMetadata(metadata.expression.expression) instanceof StaticSymbol;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass AotCompiler {\n    constructor(_config, _options, _host, reflector, _metadataResolver, _templateParser, _styleCompiler, _viewCompiler, _typeCheckCompiler, _ngModuleCompiler, _injectableCompiler, _outputEmitter, _summaryResolver, _symbolResolver) {\n        this._config = _config;\n        this._options = _options;\n        this._host = _host;\n        this.reflector = reflector;\n        this._metadataResolver = _metadataResolver;\n        this._templateParser = _templateParser;\n        this._styleCompiler = _styleCompiler;\n        this._viewCompiler = _viewCompiler;\n        this._typeCheckCompiler = _typeCheckCompiler;\n        this._ngModuleCompiler = _ngModuleCompiler;\n        this._injectableCompiler = _injectableCompiler;\n        this._outputEmitter = _outputEmitter;\n        this._summaryResolver = _summaryResolver;\n        this._symbolResolver = _symbolResolver;\n        this._templateAstCache = new Map();\n        this._analyzedFiles = new Map();\n        this._analyzedFilesForInjectables = new Map();\n    }\n    clearCache() {\n        this._metadataResolver.clearCache();\n    }\n    analyzeModulesSync(rootFiles) {\n        const analyzeResult = analyzeAndValidateNgModules(rootFiles, this._host, this._symbolResolver, this._metadataResolver);\n        analyzeResult.ngModules.forEach(ngModule => this._metadataResolver.loadNgModuleDirectiveAndPipeMetadata(ngModule.type.reference, true));\n        return analyzeResult;\n    }\n    analyzeModulesAsync(rootFiles) {\n        const analyzeResult = analyzeAndValidateNgModules(rootFiles, this._host, this._symbolResolver, this._metadataResolver);\n        return Promise\n            .all(analyzeResult.ngModules.map(ngModule => this._metadataResolver.loadNgModuleDirectiveAndPipeMetadata(ngModule.type.reference, false)))\n            .then(() => analyzeResult);\n    }\n    _analyzeFile(fileName) {\n        let analyzedFile = this._analyzedFiles.get(fileName);\n        if (!analyzedFile) {\n            analyzedFile =\n                analyzeFile(this._host, this._symbolResolver, this._metadataResolver, fileName);\n            this._analyzedFiles.set(fileName, analyzedFile);\n        }\n        return analyzedFile;\n    }\n    _analyzeFileForInjectables(fileName) {\n        let analyzedFile = this._analyzedFilesForInjectables.get(fileName);\n        if (!analyzedFile) {\n            analyzedFile = analyzeFileForInjectables(this._host, this._symbolResolver, this._metadataResolver, fileName);\n            this._analyzedFilesForInjectables.set(fileName, analyzedFile);\n        }\n        return analyzedFile;\n    }\n    findGeneratedFileNames(fileName) {\n        const genFileNames = [];\n        const file = this._analyzeFile(fileName);\n        // Make sure we create a .ngfactory if we have a injectable/directive/pipe/NgModule\n        // or a reference to a non source file.\n        // Note: This is overestimating the required .ngfactory files as the real calculation is harder.\n        // Only do this for StubEmitFlags.Basic, as adding a type check block\n        // does not change this file (as we generate type check blocks based on NgModules).\n        if (this._options.allowEmptyCodegenFiles || file.directives.length || file.pipes.length ||\n            file.injectables.length || file.ngModules.length || file.exportsNonSourceFiles) {\n            genFileNames.push(ngfactoryFilePath(file.fileName, true));\n            if (this._options.enableSummariesForJit) {\n                genFileNames.push(summaryForJitFileName(file.fileName, true));\n            }\n        }\n        const fileSuffix = normalizeGenFileSuffix(splitTypescriptSuffix(file.fileName, true)[1]);\n        file.directives.forEach((dirSymbol) => {\n            const compMeta = this._metadataResolver.getNonNormalizedDirectiveMetadata(dirSymbol).metadata;\n            if (!compMeta.isComponent) {\n                return;\n            }\n            // Note: compMeta is a component and therefore template is non null.\n            compMeta.template.styleUrls.forEach((styleUrl) => {\n                const normalizedUrl = this._host.resourceNameToFileName(styleUrl, file.fileName);\n                if (!normalizedUrl) {\n                    throw syntaxError(`Couldn't resolve resource ${styleUrl} relative to ${file.fileName}`);\n                }\n                const needsShim = (compMeta.template.encapsulation ||\n                    this._config.defaultEncapsulation) === ViewEncapsulation.Emulated;\n                genFileNames.push(_stylesModuleUrl(normalizedUrl, needsShim, fileSuffix));\n                if (this._options.allowEmptyCodegenFiles) {\n                    genFileNames.push(_stylesModuleUrl(normalizedUrl, !needsShim, fileSuffix));\n                }\n            });\n        });\n        return genFileNames;\n    }\n    emitBasicStub(genFileName, originalFileName) {\n        const outputCtx = this._createOutputContext(genFileName);\n        if (genFileName.endsWith('.ngfactory.ts')) {\n            if (!originalFileName) {\n                throw new Error(`Assertion error: require the original file for .ngfactory.ts stubs. File: ${genFileName}`);\n            }\n            const originalFile = this._analyzeFile(originalFileName);\n            this._createNgFactoryStub(outputCtx, originalFile, 1 /* Basic */);\n        }\n        else if (genFileName.endsWith('.ngsummary.ts')) {\n            if (this._options.enableSummariesForJit) {\n                if (!originalFileName) {\n                    throw new Error(`Assertion error: require the original file for .ngsummary.ts stubs. File: ${genFileName}`);\n                }\n                const originalFile = this._analyzeFile(originalFileName);\n                _createEmptyStub(outputCtx);\n                originalFile.ngModules.forEach(ngModule => {\n                    // create exports that user code can reference\n                    createForJitStub(outputCtx, ngModule.type.reference);\n                });\n            }\n        }\n        else if (genFileName.endsWith('.ngstyle.ts')) {\n            _createEmptyStub(outputCtx);\n        }\n        // Note: for the stubs, we don't need a property srcFileUrl,\n        // as later on in emitAllImpls we will create the proper GeneratedFiles with the\n        // correct srcFileUrl.\n        // This is good as e.g. for .ngstyle.ts files we can't derive\n        // the url of components based on the genFileUrl.\n        return this._codegenSourceModule('unknown', outputCtx);\n    }\n    emitTypeCheckStub(genFileName, originalFileName) {\n        const originalFile = this._analyzeFile(originalFileName);\n        const outputCtx = this._createOutputContext(genFileName);\n        if (genFileName.endsWith('.ngfactory.ts')) {\n            this._createNgFactoryStub(outputCtx, originalFile, 2 /* TypeCheck */);\n        }\n        return outputCtx.statements.length > 0 ?\n            this._codegenSourceModule(originalFile.fileName, outputCtx) :\n            null;\n    }\n    loadFilesAsync(fileNames, tsFiles) {\n        const files = fileNames.map(fileName => this._analyzeFile(fileName));\n        const loadingPromises = [];\n        files.forEach(file => file.ngModules.forEach(ngModule => loadingPromises.push(this._metadataResolver.loadNgModuleDirectiveAndPipeMetadata(ngModule.type.reference, false))));\n        const analyzedInjectables = tsFiles.map(tsFile => this._analyzeFileForInjectables(tsFile));\n        return Promise.all(loadingPromises).then(_ => ({\n            analyzedModules: mergeAndValidateNgFiles(files),\n            analyzedInjectables: analyzedInjectables,\n        }));\n    }\n    loadFilesSync(fileNames, tsFiles) {\n        const files = fileNames.map(fileName => this._analyzeFile(fileName));\n        files.forEach(file => file.ngModules.forEach(ngModule => this._metadataResolver.loadNgModuleDirectiveAndPipeMetadata(ngModule.type.reference, true)));\n        const analyzedInjectables = tsFiles.map(tsFile => this._analyzeFileForInjectables(tsFile));\n        return {\n            analyzedModules: mergeAndValidateNgFiles(files),\n            analyzedInjectables: analyzedInjectables,\n        };\n    }\n    _createNgFactoryStub(outputCtx, file, emitFlags) {\n        let componentId = 0;\n        file.ngModules.forEach((ngModuleMeta, ngModuleIndex) => {\n            // Note: the code below needs to executed for StubEmitFlags.Basic and StubEmitFlags.TypeCheck,\n            // so we don't change the .ngfactory file too much when adding the type-check block.\n            // create exports that user code can reference\n            this._ngModuleCompiler.createStub(outputCtx, ngModuleMeta.type.reference);\n            // add references to the symbols from the metadata.\n            // These can be used by the type check block for components,\n            // and they also cause TypeScript to include these files into the program too,\n            // which will make them part of the analyzedFiles.\n            const externalReferences = [\n                // Add references that are available from all the modules and imports.\n                ...ngModuleMeta.transitiveModule.directives.map(d => d.reference),\n                ...ngModuleMeta.transitiveModule.pipes.map(d => d.reference),\n                ...ngModuleMeta.importedModules.map(m => m.type.reference),\n                ...ngModuleMeta.exportedModules.map(m => m.type.reference),\n                // Add references that might be inserted by the template compiler.\n                ...this._externalIdentifierReferences([Identifiers.TemplateRef, Identifiers.ElementRef]),\n            ];\n            const externalReferenceVars = new Map();\n            externalReferences.forEach((ref, typeIndex) => {\n                externalReferenceVars.set(ref, `_decl${ngModuleIndex}_${typeIndex}`);\n            });\n            externalReferenceVars.forEach((varName, reference) => {\n                outputCtx.statements.push(variable(varName)\n                    .set(NULL_EXPR.cast(DYNAMIC_TYPE))\n                    .toDeclStmt(expressionType(outputCtx.importExpr(reference, /* typeParams */ null, /* useSummaries */ false))));\n            });\n            if (emitFlags & 2 /* TypeCheck */) {\n                // add the type-check block for all components of the NgModule\n                ngModuleMeta.declaredDirectives.forEach((dirId) => {\n                    const compMeta = this._metadataResolver.getDirectiveMetadata(dirId.reference);\n                    if (!compMeta.isComponent) {\n                        return;\n                    }\n                    componentId++;\n                    this._createTypeCheckBlock(outputCtx, `${compMeta.type.reference.name}_Host_${componentId}`, ngModuleMeta, this._metadataResolver.getHostComponentMetadata(compMeta), [compMeta.type], externalReferenceVars);\n                    this._createTypeCheckBlock(outputCtx, `${compMeta.type.reference.name}_${componentId}`, ngModuleMeta, compMeta, ngModuleMeta.transitiveModule.directives, externalReferenceVars);\n                });\n            }\n        });\n        if (outputCtx.statements.length === 0) {\n            _createEmptyStub(outputCtx);\n        }\n    }\n    _externalIdentifierReferences(references) {\n        const result = [];\n        for (let reference of references) {\n            const token = createTokenForExternalReference(this.reflector, reference);\n            if (token.identifier) {\n                result.push(token.identifier.reference);\n            }\n        }\n        return result;\n    }\n    _createTypeCheckBlock(ctx, componentId, moduleMeta, compMeta, directives, externalReferenceVars) {\n        const { template: parsedTemplate, pipes: usedPipes } = this._parseTemplate(compMeta, moduleMeta, directives);\n        ctx.statements.push(...this._typeCheckCompiler.compileComponent(componentId, compMeta, parsedTemplate, usedPipes, externalReferenceVars, ctx));\n    }\n    emitMessageBundle(analyzeResult, locale) {\n        const errors = [];\n        const htmlParser = new HtmlParser();\n        // TODO(vicb): implicit tags & attributes\n        const messageBundle = new MessageBundle(htmlParser, [], {}, locale);\n        analyzeResult.files.forEach(file => {\n            const compMetas = [];\n            file.directives.forEach(directiveType => {\n                const dirMeta = this._metadataResolver.getDirectiveMetadata(directiveType);\n                if (dirMeta && dirMeta.isComponent) {\n                    compMetas.push(dirMeta);\n                }\n            });\n            compMetas.forEach(compMeta => {\n                const html = compMeta.template.template;\n                // Template URL points to either an HTML or TS file depending on whether\n                // the file is used with `templateUrl:` or `template:`, respectively.\n                const templateUrl = compMeta.template.templateUrl;\n                const interpolationConfig = InterpolationConfig.fromArray(compMeta.template.interpolation);\n                errors.push(...messageBundle.updateFromTemplate(html, templateUrl, interpolationConfig));\n            });\n        });\n        if (errors.length) {\n            throw new Error(errors.map(e => e.toString()).join('\\n'));\n        }\n        return messageBundle;\n    }\n    emitAllPartialModules({ ngModuleByPipeOrDirective, files }, r3Files) {\n        const contextMap = new Map();\n        const getContext = (fileName) => {\n            if (!contextMap.has(fileName)) {\n                contextMap.set(fileName, this._createOutputContext(fileName));\n            }\n            return contextMap.get(fileName);\n        };\n        files.forEach(file => this._compilePartialModule(file.fileName, ngModuleByPipeOrDirective, file.directives, file.pipes, file.ngModules, file.injectables, getContext(file.fileName)));\n        r3Files.forEach(file => this._compileShallowModules(file.fileName, file.shallowModules, getContext(file.fileName)));\n        return Array.from(contextMap.values())\n            .map(context => ({\n            fileName: context.genFilePath,\n            statements: [...context.constantPool.statements, ...context.statements],\n        }));\n    }\n    _compileShallowModules(fileName, shallowModules, context) {\n        shallowModules.forEach(module => compileNgModuleFromRender2(context, module, this._injectableCompiler));\n    }\n    _compilePartialModule(fileName, ngModuleByPipeOrDirective, directives, pipes, ngModules, injectables, context) {\n        const errors = [];\n        const schemaRegistry = new DomElementSchemaRegistry();\n        const hostBindingParser = new BindingParser(this._templateParser.expressionParser, DEFAULT_INTERPOLATION_CONFIG, schemaRegistry, [], errors);\n        // Process all components and directives\n        directives.forEach(directiveType => {\n            const directiveMetadata = this._metadataResolver.getDirectiveMetadata(directiveType);\n            if (directiveMetadata.isComponent) {\n                const module = ngModuleByPipeOrDirective.get(directiveType);\n                module ||\n                    error(`Cannot determine the module for component '${identifierName(directiveMetadata.type)}'`);\n                let htmlAst = directiveMetadata.template.htmlAst;\n                const preserveWhitespaces = directiveMetadata.template.preserveWhitespaces;\n                if (!preserveWhitespaces) {\n                    htmlAst = removeWhitespaces(htmlAst);\n                }\n                const render3Ast = htmlAstToRender3Ast(htmlAst.rootNodes, hostBindingParser);\n                // Map of StaticType by directive selectors\n                const directiveTypeBySel = new Map();\n                const directives = module.transitiveModule.directives.map(dir => this._metadataResolver.getDirectiveSummary(dir.reference));\n                directives.forEach(directive => {\n                    if (directive.selector) {\n                        directiveTypeBySel.set(directive.selector, directive.type.reference);\n                    }\n                });\n                // Map of StaticType by pipe names\n                const pipeTypeByName = new Map();\n                const pipes = module.transitiveModule.pipes.map(pipe => this._metadataResolver.getPipeSummary(pipe.reference));\n                pipes.forEach(pipe => {\n                    pipeTypeByName.set(pipe.name, pipe.type.reference);\n                });\n                compileComponentFromRender2(context, directiveMetadata, render3Ast, this.reflector, hostBindingParser, directiveTypeBySel, pipeTypeByName);\n            }\n            else {\n                compileDirectiveFromRender2(context, directiveMetadata, this.reflector, hostBindingParser);\n            }\n        });\n        pipes.forEach(pipeType => {\n            const pipeMetadata = this._metadataResolver.getPipeMetadata(pipeType);\n            if (pipeMetadata) {\n                compilePipeFromRender2(context, pipeMetadata, this.reflector);\n            }\n        });\n        injectables.forEach(injectable => this._injectableCompiler.compile(injectable, context));\n    }\n    emitAllPartialModules2(files) {\n        // Using reduce like this is a select many pattern (where map is a select pattern)\n        return files.reduce((r, file) => {\n            r.push(...this._emitPartialModule2(file.fileName, file.injectables));\n            return r;\n        }, []);\n    }\n    _emitPartialModule2(fileName, injectables) {\n        const context = this._createOutputContext(fileName);\n        injectables.forEach(injectable => this._injectableCompiler.compile(injectable, context));\n        if (context.statements && context.statements.length > 0) {\n            return [{ fileName, statements: [...context.constantPool.statements, ...context.statements] }];\n        }\n        return [];\n    }\n    emitAllImpls(analyzeResult) {\n        const { ngModuleByPipeOrDirective, files } = analyzeResult;\n        const sourceModules = files.map(file => this._compileImplFile(file.fileName, ngModuleByPipeOrDirective, file.directives, file.pipes, file.ngModules, file.injectables));\n        return flatten(sourceModules);\n    }\n    _compileImplFile(srcFileUrl, ngModuleByPipeOrDirective, directives, pipes, ngModules, injectables) {\n        const fileSuffix = normalizeGenFileSuffix(splitTypescriptSuffix(srcFileUrl, true)[1]);\n        const generatedFiles = [];\n        const outputCtx = this._createOutputContext(ngfactoryFilePath(srcFileUrl, true));\n        generatedFiles.push(...this._createSummary(srcFileUrl, directives, pipes, ngModules, injectables, outputCtx));\n        // compile all ng modules\n        ngModules.forEach((ngModuleMeta) => this._compileModule(outputCtx, ngModuleMeta));\n        // compile components\n        directives.forEach((dirType) => {\n            const compMeta = this._metadataResolver.getDirectiveMetadata(dirType);\n            if (!compMeta.isComponent) {\n                return;\n            }\n            const ngModule = ngModuleByPipeOrDirective.get(dirType);\n            if (!ngModule) {\n                throw new Error(`Internal Error: cannot determine the module for component ${identifierName(compMeta.type)}!`);\n            }\n            // compile styles\n            const componentStylesheet = this._styleCompiler.compileComponent(outputCtx, compMeta);\n            // Note: compMeta is a component and therefore template is non null.\n            compMeta.template.externalStylesheets.forEach((stylesheetMeta) => {\n                // Note: fill non shim and shim style files as they might\n                // be shared by component with and without ViewEncapsulation.\n                const shim = this._styleCompiler.needsStyleShim(compMeta);\n                generatedFiles.push(this._codegenStyles(srcFileUrl, compMeta, stylesheetMeta, shim, fileSuffix));\n                if (this._options.allowEmptyCodegenFiles) {\n                    generatedFiles.push(this._codegenStyles(srcFileUrl, compMeta, stylesheetMeta, !shim, fileSuffix));\n                }\n            });\n            // compile components\n            const compViewVars = this._compileComponent(outputCtx, compMeta, ngModule, ngModule.transitiveModule.directives, componentStylesheet, fileSuffix);\n            this._compileComponentFactory(outputCtx, compMeta, ngModule, fileSuffix);\n        });\n        if (outputCtx.statements.length > 0 || this._options.allowEmptyCodegenFiles) {\n            const srcModule = this._codegenSourceModule(srcFileUrl, outputCtx);\n            generatedFiles.unshift(srcModule);\n        }\n        return generatedFiles;\n    }\n    _createSummary(srcFileName, directives, pipes, ngModules, injectables, ngFactoryCtx) {\n        const symbolSummaries = this._symbolResolver.getSymbolsOf(srcFileName)\n            .map(symbol => this._symbolResolver.resolveSymbol(symbol));\n        const typeData = [\n            ...ngModules.map(meta => ({\n                summary: this._metadataResolver.getNgModuleSummary(meta.type.reference),\n                metadata: this._metadataResolver.getNgModuleMetadata(meta.type.reference)\n            })),\n            ...directives.map(ref => ({\n                summary: this._metadataResolver.getDirectiveSummary(ref),\n                metadata: this._metadataResolver.getDirectiveMetadata(ref)\n            })),\n            ...pipes.map(ref => ({\n                summary: this._metadataResolver.getPipeSummary(ref),\n                metadata: this._metadataResolver.getPipeMetadata(ref)\n            })),\n            ...injectables.map(ref => ({\n                summary: this._metadataResolver.getInjectableSummary(ref.symbol),\n                metadata: this._metadataResolver.getInjectableSummary(ref.symbol).type\n            }))\n        ];\n        const forJitOutputCtx = this._options.enableSummariesForJit ?\n            this._createOutputContext(summaryForJitFileName(srcFileName, true)) :\n            null;\n        const { json, exportAs } = serializeSummaries(srcFileName, forJitOutputCtx, this._summaryResolver, this._symbolResolver, symbolSummaries, typeData, this._options.createExternalSymbolFactoryReexports);\n        exportAs.forEach((entry) => {\n            ngFactoryCtx.statements.push(variable(entry.exportAs).set(ngFactoryCtx.importExpr(entry.symbol)).toDeclStmt(null, [\n                StmtModifier.Exported\n            ]));\n        });\n        const summaryJson = new GeneratedFile(srcFileName, summaryFileName(srcFileName), json);\n        const result = [summaryJson];\n        if (forJitOutputCtx) {\n            result.push(this._codegenSourceModule(srcFileName, forJitOutputCtx));\n        }\n        return result;\n    }\n    _compileModule(outputCtx, ngModule) {\n        const providers = [];\n        if (this._options.locale) {\n            const normalizedLocale = this._options.locale.replace(/_/g, '-');\n            providers.push({\n                token: createTokenForExternalReference(this.reflector, Identifiers.LOCALE_ID),\n                useValue: normalizedLocale,\n            });\n        }\n        if (this._options.i18nFormat) {\n            providers.push({\n                token: createTokenForExternalReference(this.reflector, Identifiers.TRANSLATIONS_FORMAT),\n                useValue: this._options.i18nFormat\n            });\n        }\n        this._ngModuleCompiler.compile(outputCtx, ngModule, providers);\n    }\n    _compileComponentFactory(outputCtx, compMeta, ngModule, fileSuffix) {\n        const hostMeta = this._metadataResolver.getHostComponentMetadata(compMeta);\n        const hostViewFactoryVar = this._compileComponent(outputCtx, hostMeta, ngModule, [compMeta.type], null, fileSuffix)\n            .viewClassVar;\n        const compFactoryVar = componentFactoryName(compMeta.type.reference);\n        const inputsExprs = [];\n        for (let propName in compMeta.inputs) {\n            const templateName = compMeta.inputs[propName];\n            // Don't quote so that the key gets minified...\n            inputsExprs.push(new LiteralMapEntry(propName, literal(templateName), false));\n        }\n        const outputsExprs = [];\n        for (let propName in compMeta.outputs) {\n            const templateName = compMeta.outputs[propName];\n            // Don't quote so that the key gets minified...\n            outputsExprs.push(new LiteralMapEntry(propName, literal(templateName), false));\n        }\n        outputCtx.statements.push(variable(compFactoryVar)\n            .set(importExpr(Identifiers.createComponentFactory).callFn([\n            literal(compMeta.selector), outputCtx.importExpr(compMeta.type.reference),\n            variable(hostViewFactoryVar), new LiteralMapExpr(inputsExprs),\n            new LiteralMapExpr(outputsExprs),\n            literalArr(compMeta.template.ngContentSelectors.map(selector => literal(selector)))\n        ]))\n            .toDeclStmt(importType(Identifiers.ComponentFactory, [expressionType(outputCtx.importExpr(compMeta.type.reference))], [TypeModifier.Const]), [StmtModifier.Final, StmtModifier.Exported]));\n    }\n    _compileComponent(outputCtx, compMeta, ngModule, directiveIdentifiers, componentStyles, fileSuffix) {\n        const { template: parsedTemplate, pipes: usedPipes } = this._parseTemplate(compMeta, ngModule, directiveIdentifiers);\n        const stylesExpr = componentStyles ? variable(componentStyles.stylesVar) : literalArr([]);\n        const viewResult = this._viewCompiler.compileComponent(outputCtx, compMeta, parsedTemplate, stylesExpr, usedPipes);\n        if (componentStyles) {\n            _resolveStyleStatements(this._symbolResolver, componentStyles, this._styleCompiler.needsStyleShim(compMeta), fileSuffix);\n        }\n        return viewResult;\n    }\n    _parseTemplate(compMeta, ngModule, directiveIdentifiers) {\n        if (this._templateAstCache.has(compMeta.type.reference)) {\n            return this._templateAstCache.get(compMeta.type.reference);\n        }\n        const preserveWhitespaces = compMeta.template.preserveWhitespaces;\n        const directives = directiveIdentifiers.map(dir => this._metadataResolver.getDirectiveSummary(dir.reference));\n        const pipes = ngModule.transitiveModule.pipes.map(pipe => this._metadataResolver.getPipeSummary(pipe.reference));\n        const result = this._templateParser.parse(compMeta, compMeta.template.htmlAst, directives, pipes, ngModule.schemas, templateSourceUrl(ngModule.type, compMeta, compMeta.template), preserveWhitespaces);\n        this._templateAstCache.set(compMeta.type.reference, result);\n        return result;\n    }\n    _createOutputContext(genFilePath) {\n        const importExpr$1 = (symbol, typeParams = null, useSummaries = true) => {\n            if (!(symbol instanceof StaticSymbol)) {\n                throw new Error(`Internal error: unknown identifier ${JSON.stringify(symbol)}`);\n            }\n            const arity = this._symbolResolver.getTypeArity(symbol) || 0;\n            const { filePath, name, members } = this._symbolResolver.getImportAs(symbol, useSummaries) || symbol;\n            const importModule = this._fileNameToModuleName(filePath, genFilePath);\n            // It should be good enough to compare filePath to genFilePath and if they are equal\n            // there is a self reference. However, ngfactory files generate to .ts but their\n            // symbols have .d.ts so a simple compare is insufficient. They should be canonical\n            // and is tracked by #17705.\n            const selfReference = this._fileNameToModuleName(genFilePath, genFilePath);\n            const moduleName = importModule === selfReference ? null : importModule;\n            // If we are in a type expression that refers to a generic type then supply\n            // the required type parameters. If there were not enough type parameters\n            // supplied, supply any as the type. Outside a type expression the reference\n            // should not supply type parameters and be treated as a simple value reference\n            // to the constructor function itself.\n            const suppliedTypeParams = typeParams || [];\n            const missingTypeParamsCount = arity - suppliedTypeParams.length;\n            const allTypeParams = suppliedTypeParams.concat(newArray(missingTypeParamsCount, DYNAMIC_TYPE));\n            return members.reduce((expr, memberName) => expr.prop(memberName), importExpr(new ExternalReference(moduleName, name, null), allTypeParams));\n        };\n        return { statements: [], genFilePath, importExpr: importExpr$1, constantPool: new ConstantPool() };\n    }\n    _fileNameToModuleName(importedFilePath, containingFilePath) {\n        return this._summaryResolver.getKnownModuleName(importedFilePath) ||\n            this._symbolResolver.getKnownModuleName(importedFilePath) ||\n            this._host.fileNameToModuleName(importedFilePath, containingFilePath);\n    }\n    _codegenStyles(srcFileUrl, compMeta, stylesheetMetadata, isShimmed, fileSuffix) {\n        const outputCtx = this._createOutputContext(_stylesModuleUrl(stylesheetMetadata.moduleUrl, isShimmed, fileSuffix));\n        const compiledStylesheet = this._styleCompiler.compileStyles(outputCtx, compMeta, stylesheetMetadata, isShimmed);\n        _resolveStyleStatements(this._symbolResolver, compiledStylesheet, isShimmed, fileSuffix);\n        return this._codegenSourceModule(srcFileUrl, outputCtx);\n    }\n    _codegenSourceModule(srcFileUrl, ctx) {\n        return new GeneratedFile(srcFileUrl, ctx.genFilePath, ctx.statements);\n    }\n    listLazyRoutes(entryRoute, analyzedModules) {\n        const self = this;\n        if (entryRoute) {\n            const symbol = parseLazyRoute(entryRoute, this.reflector).referencedModule;\n            return visitLazyRoute(symbol);\n        }\n        else if (analyzedModules) {\n            const allLazyRoutes = [];\n            for (const ngModule of analyzedModules.ngModules) {\n                const lazyRoutes = listLazyRoutes(ngModule, this.reflector);\n                for (const lazyRoute of lazyRoutes) {\n                    allLazyRoutes.push(lazyRoute);\n                }\n            }\n            return allLazyRoutes;\n        }\n        else {\n            throw new Error(`Either route or analyzedModules has to be specified!`);\n        }\n        function visitLazyRoute(symbol, seenRoutes = new Set(), allLazyRoutes = []) {\n            // Support pointing to default exports, but stop recursing there,\n            // as the StaticReflector does not yet support default exports.\n            if (seenRoutes.has(symbol) || !symbol.name) {\n                return allLazyRoutes;\n            }\n            seenRoutes.add(symbol);\n            const lazyRoutes = listLazyRoutes(self._metadataResolver.getNgModuleMetadata(symbol, true), self.reflector);\n            for (const lazyRoute of lazyRoutes) {\n                allLazyRoutes.push(lazyRoute);\n                visitLazyRoute(lazyRoute.referencedModule, seenRoutes, allLazyRoutes);\n            }\n            return allLazyRoutes;\n        }\n    }\n}\nfunction _createEmptyStub(outputCtx) {\n    // Note: We need to produce at least one import statement so that\n    // TypeScript knows that the file is an es6 module. Otherwise our generated\n    // exports / imports won't be emitted properly by TypeScript.\n    outputCtx.statements.push(importExpr(Identifiers.ComponentFactory).toStmt());\n}\nfunction _resolveStyleStatements(symbolResolver, compileResult, needsShim, fileSuffix) {\n    compileResult.dependencies.forEach((dep) => {\n        dep.setValue(symbolResolver.getStaticSymbol(_stylesModuleUrl(dep.moduleUrl, needsShim, fileSuffix), dep.name));\n    });\n}\nfunction _stylesModuleUrl(stylesheetUrl, shim, suffix) {\n    return `${stylesheetUrl}${shim ? '.shim' : ''}.ngstyle${suffix}`;\n}\nfunction analyzeNgModules(fileNames, host, staticSymbolResolver, metadataResolver) {\n    const files = _analyzeFilesIncludingNonProgramFiles(fileNames, host, staticSymbolResolver, metadataResolver);\n    return mergeAnalyzedFiles(files);\n}\nfunction analyzeAndValidateNgModules(fileNames, host, staticSymbolResolver, metadataResolver) {\n    return validateAnalyzedModules(analyzeNgModules(fileNames, host, staticSymbolResolver, metadataResolver));\n}\nfunction validateAnalyzedModules(analyzedModules) {\n    if (analyzedModules.symbolsMissingModule && analyzedModules.symbolsMissingModule.length) {\n        const messages = analyzedModules.symbolsMissingModule.map(s => `Cannot determine the module for class ${s.name} in ${s.filePath}! Add ${s.name} to the NgModule to fix it.`);\n        throw syntaxError(messages.join('\\n'));\n    }\n    return analyzedModules;\n}\n// Analyzes all of the program files,\n// including files that are not part of the program\n// but are referenced by an NgModule.\nfunction _analyzeFilesIncludingNonProgramFiles(fileNames, host, staticSymbolResolver, metadataResolver) {\n    const seenFiles = new Set();\n    const files = [];\n    const visitFile = (fileName) => {\n        if (seenFiles.has(fileName) || !host.isSourceFile(fileName)) {\n            return false;\n        }\n        seenFiles.add(fileName);\n        const analyzedFile = analyzeFile(host, staticSymbolResolver, metadataResolver, fileName);\n        files.push(analyzedFile);\n        analyzedFile.ngModules.forEach(ngModule => {\n            ngModule.transitiveModule.modules.forEach(modMeta => visitFile(modMeta.reference.filePath));\n        });\n    };\n    fileNames.forEach((fileName) => visitFile(fileName));\n    return files;\n}\nfunction analyzeFile(host, staticSymbolResolver, metadataResolver, fileName) {\n    const abstractDirectives = [];\n    const directives = [];\n    const pipes = [];\n    const injectables = [];\n    const ngModules = [];\n    const hasDecorators = staticSymbolResolver.hasDecorators(fileName);\n    let exportsNonSourceFiles = false;\n    const isDeclarationFile = fileName.endsWith('.d.ts');\n    // Don't analyze .d.ts files that have no decorators as a shortcut\n    // to speed up the analysis. This prevents us from\n    // resolving the references in these files.\n    // Note: exportsNonSourceFiles is only needed when compiling with summaries,\n    // which is not the case when .d.ts files are treated as input files.\n    if (!isDeclarationFile || hasDecorators) {\n        staticSymbolResolver.getSymbolsOf(fileName).forEach((symbol) => {\n            const resolvedSymbol = staticSymbolResolver.resolveSymbol(symbol);\n            const symbolMeta = resolvedSymbol.metadata;\n            if (!symbolMeta || symbolMeta.__symbolic === 'error') {\n                return;\n            }\n            let isNgSymbol = false;\n            if (symbolMeta.__symbolic === 'class') {\n                if (metadataResolver.isDirective(symbol)) {\n                    isNgSymbol = true;\n                    // This directive either has a selector or doesn't. Selector-less directives get tracked\n                    // in abstractDirectives, not directives. The compiler doesn't deal with selector-less\n                    // directives at all, really, other than to persist their metadata. This is done so that\n                    // apps will have an easier time migrating to Ivy, which requires the selector-less\n                    // annotations to be applied.\n                    if (!metadataResolver.isAbstractDirective(symbol)) {\n                        // The directive is an ordinary directive.\n                        directives.push(symbol);\n                    }\n                    else {\n                        // The directive has no selector and is an \"abstract\" directive, so track it\n                        // accordingly.\n                        abstractDirectives.push(symbol);\n                    }\n                }\n                else if (metadataResolver.isPipe(symbol)) {\n                    isNgSymbol = true;\n                    pipes.push(symbol);\n                }\n                else if (metadataResolver.isNgModule(symbol)) {\n                    const ngModule = metadataResolver.getNgModuleMetadata(symbol, false);\n                    if (ngModule) {\n                        isNgSymbol = true;\n                        ngModules.push(ngModule);\n                    }\n                }\n                else if (metadataResolver.isInjectable(symbol)) {\n                    isNgSymbol = true;\n                    const injectable = metadataResolver.getInjectableMetadata(symbol, null, false);\n                    if (injectable) {\n                        injectables.push(injectable);\n                    }\n                }\n            }\n            if (!isNgSymbol) {\n                exportsNonSourceFiles =\n                    exportsNonSourceFiles || isValueExportingNonSourceFile(host, symbolMeta);\n            }\n        });\n    }\n    return {\n        fileName,\n        directives,\n        abstractDirectives,\n        pipes,\n        ngModules,\n        injectables,\n        exportsNonSourceFiles,\n    };\n}\nfunction analyzeFileForInjectables(host, staticSymbolResolver, metadataResolver, fileName) {\n    const injectables = [];\n    const shallowModules = [];\n    if (staticSymbolResolver.hasDecorators(fileName)) {\n        staticSymbolResolver.getSymbolsOf(fileName).forEach((symbol) => {\n            const resolvedSymbol = staticSymbolResolver.resolveSymbol(symbol);\n            const symbolMeta = resolvedSymbol.metadata;\n            if (!symbolMeta || symbolMeta.__symbolic === 'error') {\n                return;\n            }\n            if (symbolMeta.__symbolic === 'class') {\n                if (metadataResolver.isInjectable(symbol)) {\n                    const injectable = metadataResolver.getInjectableMetadata(symbol, null, false);\n                    if (injectable) {\n                        injectables.push(injectable);\n                    }\n                }\n                else if (metadataResolver.isNgModule(symbol)) {\n                    const module = metadataResolver.getShallowModuleMetadata(symbol);\n                    if (module) {\n                        shallowModules.push(module);\n                    }\n                }\n            }\n        });\n    }\n    return { fileName, injectables, shallowModules };\n}\nfunction isValueExportingNonSourceFile(host, metadata) {\n    let exportsNonSourceFiles = false;\n    class Visitor {\n        visitArray(arr, context) {\n            arr.forEach(v => visitValue(v, this, context));\n        }\n        visitStringMap(map, context) {\n            Object.keys(map).forEach((key) => visitValue(map[key], this, context));\n        }\n        visitPrimitive(value, context) { }\n        visitOther(value, context) {\n            if (value instanceof StaticSymbol && !host.isSourceFile(value.filePath)) {\n                exportsNonSourceFiles = true;\n            }\n        }\n    }\n    visitValue(metadata, new Visitor(), null);\n    return exportsNonSourceFiles;\n}\nfunction mergeAnalyzedFiles(analyzedFiles) {\n    const allNgModules = [];\n    const ngModuleByPipeOrDirective = new Map();\n    const allPipesAndDirectives = new Set();\n    analyzedFiles.forEach(af => {\n        af.ngModules.forEach(ngModule => {\n            allNgModules.push(ngModule);\n            ngModule.declaredDirectives.forEach(d => ngModuleByPipeOrDirective.set(d.reference, ngModule));\n            ngModule.declaredPipes.forEach(p => ngModuleByPipeOrDirective.set(p.reference, ngModule));\n        });\n        af.directives.forEach(d => allPipesAndDirectives.add(d));\n        af.pipes.forEach(p => allPipesAndDirectives.add(p));\n    });\n    const symbolsMissingModule = [];\n    allPipesAndDirectives.forEach(ref => {\n        if (!ngModuleByPipeOrDirective.has(ref)) {\n            symbolsMissingModule.push(ref);\n        }\n    });\n    return {\n        ngModules: allNgModules,\n        ngModuleByPipeOrDirective,\n        symbolsMissingModule,\n        files: analyzedFiles\n    };\n}\nfunction mergeAndValidateNgFiles(files) {\n    return validateAnalyzedModules(mergeAnalyzedFiles(files));\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst FORMATTED_MESSAGE = 'ngFormattedMessage';\nfunction indentStr(level) {\n    if (level <= 0)\n        return '';\n    if (level < 6)\n        return ['', ' ', '  ', '   ', '    ', '     '][level];\n    const half = indentStr(Math.floor(level / 2));\n    return half + half + (level % 2 === 1 ? ' ' : '');\n}\nfunction formatChain(chain, indent = 0) {\n    if (!chain)\n        return '';\n    const position = chain.position ?\n        `${chain.position.fileName}(${chain.position.line + 1},${chain.position.column + 1})` :\n        '';\n    const prefix = position && indent === 0 ? `${position}: ` : '';\n    const postfix = position && indent !== 0 ? ` at ${position}` : '';\n    let message = `${prefix}${chain.message}${postfix}`;\n    if (chain.next) {\n        for (const kid of chain.next) {\n            message += '\\n' + formatChain(kid, indent + 2);\n        }\n    }\n    return `${indentStr(indent)}${message}`;\n}\nfunction formattedError(chain) {\n    const message = formatChain(chain) + '.';\n    const error = syntaxError(message);\n    error[FORMATTED_MESSAGE] = true;\n    error.chain = chain;\n    error.position = chain.position;\n    return error;\n}\nfunction isFormattedError(error) {\n    return !!error[FORMATTED_MESSAGE];\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst ANGULAR_CORE = '@angular/core';\nconst ANGULAR_ROUTER = '@angular/router';\nconst HIDDEN_KEY = /^\\$.*\\$$/;\nconst IGNORE = {\n    __symbolic: 'ignore'\n};\nconst USE_VALUE$1 = 'useValue';\nconst PROVIDE = 'provide';\nconst REFERENCE_SET = new Set([USE_VALUE$1, 'useFactory', 'data', 'id', 'loadChildren']);\nconst TYPEGUARD_POSTFIX = 'TypeGuard';\nconst USE_IF = 'UseIf';\nfunction shouldIgnore(value) {\n    return value && value.__symbolic == 'ignore';\n}\n/**\n * A static reflector implements enough of the Reflector API that is necessary to compile\n * templates statically.\n */\nclass StaticReflector {\n    constructor(summaryResolver, symbolResolver, knownMetadataClasses = [], knownMetadataFunctions = [], errorRecorder) {\n        this.summaryResolver = summaryResolver;\n        this.symbolResolver = symbolResolver;\n        this.errorRecorder = errorRecorder;\n        this.annotationCache = new Map();\n        this.shallowAnnotationCache = new Map();\n        this.propertyCache = new Map();\n        this.parameterCache = new Map();\n        this.methodCache = new Map();\n        this.staticCache = new Map();\n        this.conversionMap = new Map();\n        this.resolvedExternalReferences = new Map();\n        this.annotationForParentClassWithSummaryKind = new Map();\n        this.initializeConversionMap();\n        knownMetadataClasses.forEach((kc) => this._registerDecoratorOrConstructor(this.getStaticSymbol(kc.filePath, kc.name), kc.ctor));\n        knownMetadataFunctions.forEach((kf) => this._registerFunction(this.getStaticSymbol(kf.filePath, kf.name), kf.fn));\n        this.annotationForParentClassWithSummaryKind.set(CompileSummaryKind.Directive, [createDirective, createComponent]);\n        this.annotationForParentClassWithSummaryKind.set(CompileSummaryKind.Pipe, [createPipe]);\n        this.annotationForParentClassWithSummaryKind.set(CompileSummaryKind.NgModule, [createNgModule]);\n        this.annotationForParentClassWithSummaryKind.set(CompileSummaryKind.Injectable, [createInjectable, createPipe, createDirective, createComponent, createNgModule]);\n    }\n    componentModuleUrl(typeOrFunc) {\n        const staticSymbol = this.findSymbolDeclaration(typeOrFunc);\n        return this.symbolResolver.getResourcePath(staticSymbol);\n    }\n    /**\n     * Invalidate the specified `symbols` on program change.\n     * @param symbols\n     */\n    invalidateSymbols(symbols) {\n        for (const symbol of symbols) {\n            this.annotationCache.delete(symbol);\n            this.shallowAnnotationCache.delete(symbol);\n            this.propertyCache.delete(symbol);\n            this.parameterCache.delete(symbol);\n            this.methodCache.delete(symbol);\n            this.staticCache.delete(symbol);\n            this.conversionMap.delete(symbol);\n        }\n    }\n    resolveExternalReference(ref, containingFile) {\n        let key = undefined;\n        if (!containingFile) {\n            key = `${ref.moduleName}:${ref.name}`;\n            const declarationSymbol = this.resolvedExternalReferences.get(key);\n            if (declarationSymbol)\n                return declarationSymbol;\n        }\n        const refSymbol = this.symbolResolver.getSymbolByModule(ref.moduleName, ref.name, containingFile);\n        const declarationSymbol = this.findSymbolDeclaration(refSymbol);\n        if (!containingFile) {\n            this.symbolResolver.recordModuleNameForFileName(refSymbol.filePath, ref.moduleName);\n            this.symbolResolver.recordImportAs(declarationSymbol, refSymbol);\n        }\n        if (key) {\n            this.resolvedExternalReferences.set(key, declarationSymbol);\n        }\n        return declarationSymbol;\n    }\n    findDeclaration(moduleUrl, name, containingFile) {\n        return this.findSymbolDeclaration(this.symbolResolver.getSymbolByModule(moduleUrl, name, containingFile));\n    }\n    tryFindDeclaration(moduleUrl, name, containingFile) {\n        return this.symbolResolver.ignoreErrorsFor(() => this.findDeclaration(moduleUrl, name, containingFile));\n    }\n    findSymbolDeclaration(symbol) {\n        const resolvedSymbol = this.symbolResolver.resolveSymbol(symbol);\n        if (resolvedSymbol) {\n            let resolvedMetadata = resolvedSymbol.metadata;\n            if (resolvedMetadata && resolvedMetadata.__symbolic === 'resolved') {\n                resolvedMetadata = resolvedMetadata.symbol;\n            }\n            if (resolvedMetadata instanceof StaticSymbol) {\n                return this.findSymbolDeclaration(resolvedSymbol.metadata);\n            }\n        }\n        return symbol;\n    }\n    tryAnnotations(type) {\n        const originalRecorder = this.errorRecorder;\n        this.errorRecorder = (error, fileName) => { };\n        try {\n            return this.annotations(type);\n        }\n        finally {\n            this.errorRecorder = originalRecorder;\n        }\n    }\n    annotations(type) {\n        return this._annotations(type, (type, decorators) => this.simplify(type, decorators), this.annotationCache);\n    }\n    shallowAnnotations(type) {\n        return this._annotations(type, (type, decorators) => this.simplify(type, decorators, true), this.shallowAnnotationCache);\n    }\n    _annotations(type, simplify, annotationCache) {\n        let annotations = annotationCache.get(type);\n        if (!annotations) {\n            annotations = [];\n            const classMetadata = this.getTypeMetadata(type);\n            const parentType = this.findParentType(type, classMetadata);\n            if (parentType) {\n                const parentAnnotations = this.annotations(parentType);\n                annotations.push(...parentAnnotations);\n            }\n            let ownAnnotations = [];\n            if (classMetadata['decorators']) {\n                ownAnnotations = simplify(type, classMetadata['decorators']);\n                if (ownAnnotations) {\n                    annotations.push(...ownAnnotations);\n                }\n            }\n            if (parentType && !this.summaryResolver.isLibraryFile(type.filePath) &&\n                this.summaryResolver.isLibraryFile(parentType.filePath)) {\n                const summary = this.summaryResolver.resolveSummary(parentType);\n                if (summary && summary.type) {\n                    const requiredAnnotationTypes = this.annotationForParentClassWithSummaryKind.get(summary.type.summaryKind);\n                    const typeHasRequiredAnnotation = requiredAnnotationTypes.some((requiredType) => ownAnnotations.some(ann => requiredType.isTypeOf(ann)));\n                    if (!typeHasRequiredAnnotation) {\n                        this.reportError(formatMetadataError(metadataError(`Class ${type.name} in ${type.filePath} extends from a ${CompileSummaryKind[summary.type.summaryKind]} in another compilation unit without duplicating the decorator`, \n                        /* summary */ undefined, `Please add a ${requiredAnnotationTypes.map((type) => type.ngMetadataName)\n                            .join(' or ')} decorator to the class`), type), type);\n                    }\n                }\n            }\n            annotationCache.set(type, annotations.filter(ann => !!ann));\n        }\n        return annotations;\n    }\n    propMetadata(type) {\n        let propMetadata = this.propertyCache.get(type);\n        if (!propMetadata) {\n            const classMetadata = this.getTypeMetadata(type);\n            propMetadata = {};\n            const parentType = this.findParentType(type, classMetadata);\n            if (parentType) {\n                const parentPropMetadata = this.propMetadata(parentType);\n                Object.keys(parentPropMetadata).forEach((parentProp) => {\n                    propMetadata[parentProp] = parentPropMetadata[parentProp];\n                });\n            }\n            const members = classMetadata['members'] || {};\n            Object.keys(members).forEach((propName) => {\n                const propData = members[propName];\n                const prop = propData\n                    .find(a => a['__symbolic'] == 'property' || a['__symbolic'] == 'method');\n                const decorators = [];\n                // hasOwnProperty() is used here to make sure we do not look up methods\n                // on `Object.prototype`.\n                if (propMetadata === null || propMetadata === void 0 ? void 0 : propMetadata.hasOwnProperty(propName)) {\n                    decorators.push(...propMetadata[propName]);\n                }\n                propMetadata[propName] = decorators;\n                if (prop && prop['decorators']) {\n                    decorators.push(...this.simplify(type, prop['decorators']));\n                }\n            });\n            this.propertyCache.set(type, propMetadata);\n        }\n        return propMetadata;\n    }\n    parameters(type) {\n        if (!(type instanceof StaticSymbol)) {\n            this.reportError(new Error(`parameters received ${JSON.stringify(type)} which is not a StaticSymbol`), type);\n            return [];\n        }\n        try {\n            let parameters = this.parameterCache.get(type);\n            if (!parameters) {\n                const classMetadata = this.getTypeMetadata(type);\n                const parentType = this.findParentType(type, classMetadata);\n                const members = classMetadata ? classMetadata['members'] : null;\n                const ctorData = members ? members['__ctor__'] : null;\n                if (ctorData) {\n                    const ctor = ctorData.find(a => a['__symbolic'] == 'constructor');\n                    const rawParameterTypes = ctor['parameters'] || [];\n                    const parameterDecorators = this.simplify(type, ctor['parameterDecorators'] || []);\n                    parameters = [];\n                    rawParameterTypes.forEach((rawParamType, index) => {\n                        const nestedResult = [];\n                        const paramType = this.trySimplify(type, rawParamType);\n                        if (paramType)\n                            nestedResult.push(paramType);\n                        const decorators = parameterDecorators ? parameterDecorators[index] : null;\n                        if (decorators) {\n                            nestedResult.push(...decorators);\n                        }\n                        parameters.push(nestedResult);\n                    });\n                }\n                else if (parentType) {\n                    parameters = this.parameters(parentType);\n                }\n                if (!parameters) {\n                    parameters = [];\n                }\n                this.parameterCache.set(type, parameters);\n            }\n            return parameters;\n        }\n        catch (e) {\n            console.error(`Failed on type ${JSON.stringify(type)} with error ${e}`);\n            throw e;\n        }\n    }\n    _methodNames(type) {\n        let methodNames = this.methodCache.get(type);\n        if (!methodNames) {\n            const classMetadata = this.getTypeMetadata(type);\n            methodNames = {};\n            const parentType = this.findParentType(type, classMetadata);\n            if (parentType) {\n                const parentMethodNames = this._methodNames(parentType);\n                Object.keys(parentMethodNames).forEach((parentProp) => {\n                    methodNames[parentProp] = parentMethodNames[parentProp];\n                });\n            }\n            const members = classMetadata['members'] || {};\n            Object.keys(members).forEach((propName) => {\n                const propData = members[propName];\n                const isMethod = propData.some(a => a['__symbolic'] == 'method');\n                methodNames[propName] = methodNames[propName] || isMethod;\n            });\n            this.methodCache.set(type, methodNames);\n        }\n        return methodNames;\n    }\n    _staticMembers(type) {\n        let staticMembers = this.staticCache.get(type);\n        if (!staticMembers) {\n            const classMetadata = this.getTypeMetadata(type);\n            const staticMemberData = classMetadata['statics'] || {};\n            staticMembers = Object.keys(staticMemberData);\n            this.staticCache.set(type, staticMembers);\n        }\n        return staticMembers;\n    }\n    findParentType(type, classMetadata) {\n        const parentType = this.trySimplify(type, classMetadata['extends']);\n        if (parentType instanceof StaticSymbol) {\n            return parentType;\n        }\n    }\n    hasLifecycleHook(type, lcProperty) {\n        if (!(type instanceof StaticSymbol)) {\n            this.reportError(new Error(`hasLifecycleHook received ${JSON.stringify(type)} which is not a StaticSymbol`), type);\n        }\n        try {\n            return !!this._methodNames(type)[lcProperty];\n        }\n        catch (e) {\n            console.error(`Failed on type ${JSON.stringify(type)} with error ${e}`);\n            throw e;\n        }\n    }\n    guards(type) {\n        if (!(type instanceof StaticSymbol)) {\n            this.reportError(new Error(`guards received ${JSON.stringify(type)} which is not a StaticSymbol`), type);\n            return {};\n        }\n        const staticMembers = this._staticMembers(type);\n        const result = {};\n        for (let name of staticMembers) {\n            if (name.endsWith(TYPEGUARD_POSTFIX)) {\n                let property = name.substr(0, name.length - TYPEGUARD_POSTFIX.length);\n                let value;\n                if (property.endsWith(USE_IF)) {\n                    property = name.substr(0, property.length - USE_IF.length);\n                    value = USE_IF;\n                }\n                else {\n                    value = this.getStaticSymbol(type.filePath, type.name, [name]);\n                }\n                result[property] = value;\n            }\n        }\n        return result;\n    }\n    _registerDecoratorOrConstructor(type, ctor) {\n        this.conversionMap.set(type, (context, args) => new ctor(...args));\n    }\n    _registerFunction(type, fn) {\n        this.conversionMap.set(type, (context, args) => fn.apply(undefined, args));\n    }\n    initializeConversionMap() {\n        this._registerDecoratorOrConstructor(this.findDeclaration(ANGULAR_CORE, 'Injectable'), createInjectable);\n        this.injectionToken = this.findDeclaration(ANGULAR_CORE, 'InjectionToken');\n        this.opaqueToken = this.findDeclaration(ANGULAR_CORE, 'OpaqueToken');\n        this.ROUTES = this.tryFindDeclaration(ANGULAR_ROUTER, 'ROUTES');\n        this.ANALYZE_FOR_ENTRY_COMPONENTS =\n            this.findDeclaration(ANGULAR_CORE, 'ANALYZE_FOR_ENTRY_COMPONENTS');\n        this._registerDecoratorOrConstructor(this.findDeclaration(ANGULAR_CORE, 'Host'), createHost);\n        this._registerDecoratorOrConstructor(this.findDeclaration(ANGULAR_CORE, 'Self'), createSelf);\n        this._registerDecoratorOrConstructor(this.findDeclaration(ANGULAR_CORE, 'SkipSelf'), createSkipSelf);\n        this._registerDecoratorOrConstructor(this.findDeclaration(ANGULAR_CORE, 'Inject'), createInject);\n        this._registerDecoratorOrConstructor(this.findDeclaration(ANGULAR_CORE, 'Optional'), createOptional);\n        this._registerDecoratorOrConstructor(this.findDeclaration(ANGULAR_CORE, 'Attribute'), createAttribute);\n        this._registerDecoratorOrConstructor(this.findDeclaration(ANGULAR_CORE, 'ContentChild'), createContentChild);\n        this._registerDecoratorOrConstructor(this.findDeclaration(ANGULAR_CORE, 'ContentChildren'), createContentChildren);\n        this._registerDecoratorOrConstructor(this.findDeclaration(ANGULAR_CORE, 'ViewChild'), createViewChild);\n        this._registerDecoratorOrConstructor(this.findDeclaration(ANGULAR_CORE, 'ViewChildren'), createViewChildren);\n        this._registerDecoratorOrConstructor(this.findDeclaration(ANGULAR_CORE, 'Input'), createInput);\n        this._registerDecoratorOrConstructor(this.findDeclaration(ANGULAR_CORE, 'Output'), createOutput);\n        this._registerDecoratorOrConstructor(this.findDeclaration(ANGULAR_CORE, 'Pipe'), createPipe);\n        this._registerDecoratorOrConstructor(this.findDeclaration(ANGULAR_CORE, 'HostBinding'), createHostBinding);\n        this._registerDecoratorOrConstructor(this.findDeclaration(ANGULAR_CORE, 'HostListener'), createHostListener);\n        this._registerDecoratorOrConstructor(this.findDeclaration(ANGULAR_CORE, 'Directive'), createDirective);\n        this._registerDecoratorOrConstructor(this.findDeclaration(ANGULAR_CORE, 'Component'), createComponent);\n        this._registerDecoratorOrConstructor(this.findDeclaration(ANGULAR_CORE, 'NgModule'), createNgModule);\n        // Note: Some metadata classes can be used directly with Provider.deps.\n        this._registerDecoratorOrConstructor(this.findDeclaration(ANGULAR_CORE, 'Host'), createHost);\n        this._registerDecoratorOrConstructor(this.findDeclaration(ANGULAR_CORE, 'Self'), createSelf);\n        this._registerDecoratorOrConstructor(this.findDeclaration(ANGULAR_CORE, 'SkipSelf'), createSkipSelf);\n        this._registerDecoratorOrConstructor(this.findDeclaration(ANGULAR_CORE, 'Optional'), createOptional);\n    }\n    /**\n     * getStaticSymbol produces a Type whose metadata is known but whose implementation is not loaded.\n     * All types passed to the StaticResolver should be pseudo-types returned by this method.\n     *\n     * @param declarationFile the absolute path of the file where the symbol is declared\n     * @param name the name of the type.\n     */\n    getStaticSymbol(declarationFile, name, members) {\n        return this.symbolResolver.getStaticSymbol(declarationFile, name, members);\n    }\n    /**\n     * Simplify but discard any errors\n     */\n    trySimplify(context, value) {\n        const originalRecorder = this.errorRecorder;\n        this.errorRecorder = (error, fileName) => { };\n        const result = this.simplify(context, value);\n        this.errorRecorder = originalRecorder;\n        return result;\n    }\n    /** @internal */\n    simplify(context, value, lazy = false) {\n        const self = this;\n        let scope = BindingScope$1.empty;\n        const calling = new Map();\n        const rootContext = context;\n        function simplifyInContext(context, value, depth, references) {\n            function resolveReferenceValue(staticSymbol) {\n                const resolvedSymbol = self.symbolResolver.resolveSymbol(staticSymbol);\n                return resolvedSymbol ? resolvedSymbol.metadata : null;\n            }\n            function simplifyEagerly(value) {\n                return simplifyInContext(context, value, depth, 0);\n            }\n            function simplifyLazily(value) {\n                return simplifyInContext(context, value, depth, references + 1);\n            }\n            function simplifyNested(nestedContext, value) {\n                if (nestedContext === context) {\n                    // If the context hasn't changed let the exception propagate unmodified.\n                    return simplifyInContext(nestedContext, value, depth + 1, references);\n                }\n                try {\n                    return simplifyInContext(nestedContext, value, depth + 1, references);\n                }\n                catch (e) {\n                    if (isMetadataError(e)) {\n                        // Propagate the message text up but add a message to the chain that explains how we got\n                        // here.\n                        // e.chain implies e.symbol\n                        const summaryMsg = e.chain ? 'references \\'' + e.symbol.name + '\\'' : errorSummary(e);\n                        const summary = `'${nestedContext.name}' ${summaryMsg}`;\n                        const chain = { message: summary, position: e.position, next: e.chain };\n                        // TODO(chuckj): retrieve the position information indirectly from the collectors node\n                        // map if the metadata is from a .ts file.\n                        self.error({\n                            message: e.message,\n                            advise: e.advise,\n                            context: e.context,\n                            chain,\n                            symbol: nestedContext\n                        }, context);\n                    }\n                    else {\n                        // It is probably an internal error.\n                        throw e;\n                    }\n                }\n            }\n            function simplifyCall(functionSymbol, targetFunction, args, targetExpression) {\n                if (targetFunction && targetFunction['__symbolic'] == 'function') {\n                    if (calling.get(functionSymbol)) {\n                        self.error({\n                            message: 'Recursion is not supported',\n                            summary: `called '${functionSymbol.name}' recursively`,\n                            value: targetFunction\n                        }, functionSymbol);\n                    }\n                    try {\n                        const value = targetFunction['value'];\n                        if (value && (depth != 0 || value.__symbolic != 'error')) {\n                            const parameters = targetFunction['parameters'];\n                            const defaults = targetFunction.defaults;\n                            args = args.map(arg => simplifyNested(context, arg))\n                                .map(arg => shouldIgnore(arg) ? undefined : arg);\n                            if (defaults && defaults.length > args.length) {\n                                args.push(...defaults.slice(args.length).map((value) => simplify(value)));\n                            }\n                            calling.set(functionSymbol, true);\n                            const functionScope = BindingScope$1.build();\n                            for (let i = 0; i < parameters.length; i++) {\n                                functionScope.define(parameters[i], args[i]);\n                            }\n                            const oldScope = scope;\n                            let result;\n                            try {\n                                scope = functionScope.done();\n                                result = simplifyNested(functionSymbol, value);\n                            }\n                            finally {\n                                scope = oldScope;\n                            }\n                            return result;\n                        }\n                    }\n                    finally {\n                        calling.delete(functionSymbol);\n                    }\n                }\n                if (depth === 0) {\n                    // If depth is 0 we are evaluating the top level expression that is describing element\n                    // decorator. In this case, it is a decorator we don't understand, such as a custom\n                    // non-angular decorator, and we should just ignore it.\n                    return IGNORE;\n                }\n                let position = undefined;\n                if (targetExpression && targetExpression.__symbolic == 'resolved') {\n                    const line = targetExpression.line;\n                    const character = targetExpression.character;\n                    const fileName = targetExpression.fileName;\n                    if (fileName != null && line != null && character != null) {\n                        position = { fileName, line, column: character };\n                    }\n                }\n                self.error({\n                    message: FUNCTION_CALL_NOT_SUPPORTED,\n                    context: functionSymbol,\n                    value: targetFunction,\n                    position\n                }, context);\n            }\n            function simplify(expression) {\n                if (isPrimitive(expression)) {\n                    return expression;\n                }\n                if (Array.isArray(expression)) {\n                    const result = [];\n                    for (const item of expression) {\n                        // Check for a spread expression\n                        if (item && item.__symbolic === 'spread') {\n                            // We call with references as 0 because we require the actual value and cannot\n                            // tolerate a reference here.\n                            const spreadArray = simplifyEagerly(item.expression);\n                            if (Array.isArray(spreadArray)) {\n                                for (const spreadItem of spreadArray) {\n                                    result.push(spreadItem);\n                                }\n                                continue;\n                            }\n                        }\n                        const value = simplify(item);\n                        if (shouldIgnore(value)) {\n                            continue;\n                        }\n                        result.push(value);\n                    }\n                    return result;\n                }\n                if (expression instanceof StaticSymbol) {\n                    // Stop simplification at builtin symbols or if we are in a reference context and\n                    // the symbol doesn't have members.\n                    if (expression === self.injectionToken || self.conversionMap.has(expression) ||\n                        (references > 0 && !expression.members.length)) {\n                        return expression;\n                    }\n                    else {\n                        const staticSymbol = expression;\n                        const declarationValue = resolveReferenceValue(staticSymbol);\n                        if (declarationValue != null) {\n                            return simplifyNested(staticSymbol, declarationValue);\n                        }\n                        else {\n                            return staticSymbol;\n                        }\n                    }\n                }\n                if (expression) {\n                    if (expression['__symbolic']) {\n                        let staticSymbol;\n                        switch (expression['__symbolic']) {\n                            case 'binop':\n                                let left = simplify(expression['left']);\n                                if (shouldIgnore(left))\n                                    return left;\n                                let right = simplify(expression['right']);\n                                if (shouldIgnore(right))\n                                    return right;\n                                switch (expression['operator']) {\n                                    case '&&':\n                                        return left && right;\n                                    case '||':\n                                        return left || right;\n                                    case '|':\n                                        return left | right;\n                                    case '^':\n                                        return left ^ right;\n                                    case '&':\n                                        return left & right;\n                                    case '==':\n                                        return left == right;\n                                    case '!=':\n                                        return left != right;\n                                    case '===':\n                                        return left === right;\n                                    case '!==':\n                                        return left !== right;\n                                    case '<':\n                                        return left < right;\n                                    case '>':\n                                        return left > right;\n                                    case '<=':\n                                        return left <= right;\n                                    case '>=':\n                                        return left >= right;\n                                    case '<<':\n                                        return left << right;\n                                    case '>>':\n                                        return left >> right;\n                                    case '+':\n                                        return left + right;\n                                    case '-':\n                                        return left - right;\n                                    case '*':\n                                        return left * right;\n                                    case '/':\n                                        return left / right;\n                                    case '%':\n                                        return left % right;\n                                }\n                                return null;\n                            case 'if':\n                                let condition = simplify(expression['condition']);\n                                return condition ? simplify(expression['thenExpression']) :\n                                    simplify(expression['elseExpression']);\n                            case 'pre':\n                                let operand = simplify(expression['operand']);\n                                if (shouldIgnore(operand))\n                                    return operand;\n                                switch (expression['operator']) {\n                                    case '+':\n                                        return operand;\n                                    case '-':\n                                        return -operand;\n                                    case '!':\n                                        return !operand;\n                                    case '~':\n                                        return ~operand;\n                                }\n                                return null;\n                            case 'index':\n                                let indexTarget = simplifyEagerly(expression['expression']);\n                                let index = simplifyEagerly(expression['index']);\n                                if (indexTarget && isPrimitive(index))\n                                    return indexTarget[index];\n                                return null;\n                            case 'select':\n                                const member = expression['member'];\n                                let selectContext = context;\n                                let selectTarget = simplify(expression['expression']);\n                                if (selectTarget instanceof StaticSymbol) {\n                                    const members = selectTarget.members.concat(member);\n                                    selectContext =\n                                        self.getStaticSymbol(selectTarget.filePath, selectTarget.name, members);\n                                    const declarationValue = resolveReferenceValue(selectContext);\n                                    if (declarationValue != null) {\n                                        return simplifyNested(selectContext, declarationValue);\n                                    }\n                                    else {\n                                        return selectContext;\n                                    }\n                                }\n                                if (selectTarget && isPrimitive(member))\n                                    return simplifyNested(selectContext, selectTarget[member]);\n                                return null;\n                            case 'reference':\n                                // Note: This only has to deal with variable references, as symbol references have\n                                // been converted into 'resolved'\n                                // in the StaticSymbolResolver.\n                                const name = expression['name'];\n                                const localValue = scope.resolve(name);\n                                if (localValue != BindingScope$1.missing) {\n                                    return localValue;\n                                }\n                                break;\n                            case 'resolved':\n                                try {\n                                    return simplify(expression.symbol);\n                                }\n                                catch (e) {\n                                    // If an error is reported evaluating the symbol record the position of the\n                                    // reference in the error so it can\n                                    // be reported in the error message generated from the exception.\n                                    if (isMetadataError(e) && expression.fileName != null &&\n                                        expression.line != null && expression.character != null) {\n                                        e.position = {\n                                            fileName: expression.fileName,\n                                            line: expression.line,\n                                            column: expression.character\n                                        };\n                                    }\n                                    throw e;\n                                }\n                            case 'class':\n                                return context;\n                            case 'function':\n                                return context;\n                            case 'new':\n                            case 'call':\n                                // Determine if the function is a built-in conversion\n                                staticSymbol = simplifyInContext(context, expression['expression'], depth + 1, /* references */ 0);\n                                if (staticSymbol instanceof StaticSymbol) {\n                                    if (staticSymbol === self.injectionToken || staticSymbol === self.opaqueToken) {\n                                        // if somebody calls new InjectionToken, don't create an InjectionToken,\n                                        // but rather return the symbol to which the InjectionToken is assigned to.\n                                        // OpaqueToken is supported too as it is required by the language service to\n                                        // support v4 and prior versions of Angular.\n                                        return context;\n                                    }\n                                    const argExpressions = expression['arguments'] || [];\n                                    let converter = self.conversionMap.get(staticSymbol);\n                                    if (converter) {\n                                        const args = argExpressions.map(arg => simplifyNested(context, arg))\n                                            .map(arg => shouldIgnore(arg) ? undefined : arg);\n                                        return converter(context, args);\n                                    }\n                                    else {\n                                        // Determine if the function is one we can simplify.\n                                        const targetFunction = resolveReferenceValue(staticSymbol);\n                                        return simplifyCall(staticSymbol, targetFunction, argExpressions, expression['expression']);\n                                    }\n                                }\n                                return IGNORE;\n                            case 'error':\n                                let message = expression.message;\n                                if (expression['line'] != null) {\n                                    self.error({\n                                        message,\n                                        context: expression.context,\n                                        value: expression,\n                                        position: {\n                                            fileName: expression['fileName'],\n                                            line: expression['line'],\n                                            column: expression['character']\n                                        }\n                                    }, context);\n                                }\n                                else {\n                                    self.error({ message, context: expression.context }, context);\n                                }\n                                return IGNORE;\n                            case 'ignore':\n                                return expression;\n                        }\n                        return null;\n                    }\n                    return mapStringMap(expression, (value, name) => {\n                        if (REFERENCE_SET.has(name)) {\n                            if (name === USE_VALUE$1 && PROVIDE in expression) {\n                                // If this is a provider expression, check for special tokens that need the value\n                                // during analysis.\n                                const provide = simplify(expression.provide);\n                                if (provide === self.ROUTES || provide == self.ANALYZE_FOR_ENTRY_COMPONENTS) {\n                                    return simplify(value);\n                                }\n                            }\n                            return simplifyLazily(value);\n                        }\n                        return simplify(value);\n                    });\n                }\n                return IGNORE;\n            }\n            return simplify(value);\n        }\n        let result;\n        try {\n            result = simplifyInContext(context, value, 0, lazy ? 1 : 0);\n        }\n        catch (e) {\n            if (this.errorRecorder) {\n                this.reportError(e, context);\n            }\n            else {\n                throw formatMetadataError(e, context);\n            }\n        }\n        if (shouldIgnore(result)) {\n            return undefined;\n        }\n        return result;\n    }\n    getTypeMetadata(type) {\n        const resolvedSymbol = this.symbolResolver.resolveSymbol(type);\n        return resolvedSymbol && resolvedSymbol.metadata ? resolvedSymbol.metadata :\n            { __symbolic: 'class' };\n    }\n    reportError(error, context, path) {\n        if (this.errorRecorder) {\n            this.errorRecorder(formatMetadataError(error, context), (context && context.filePath) || path);\n        }\n        else {\n            throw error;\n        }\n    }\n    error({ message, summary, advise, position, context, value, symbol, chain }, reportingContext) {\n        this.reportError(metadataError(message, summary, advise, position, symbol, context, chain), reportingContext);\n    }\n}\nconst METADATA_ERROR = 'ngMetadataError';\nfunction metadataError(message, summary, advise, position, symbol, context, chain) {\n    const error = syntaxError(message);\n    error[METADATA_ERROR] = true;\n    if (advise)\n        error.advise = advise;\n    if (position)\n        error.position = position;\n    if (summary)\n        error.summary = summary;\n    if (context)\n        error.context = context;\n    if (chain)\n        error.chain = chain;\n    if (symbol)\n        error.symbol = symbol;\n    return error;\n}\nfunction isMetadataError(error) {\n    return !!error[METADATA_ERROR];\n}\nconst REFERENCE_TO_NONEXPORTED_CLASS = 'Reference to non-exported class';\nconst VARIABLE_NOT_INITIALIZED = 'Variable not initialized';\nconst DESTRUCTURE_NOT_SUPPORTED = 'Destructuring not supported';\nconst COULD_NOT_RESOLVE_TYPE = 'Could not resolve type';\nconst FUNCTION_CALL_NOT_SUPPORTED = 'Function call not supported';\nconst REFERENCE_TO_LOCAL_SYMBOL = 'Reference to a local symbol';\nconst LAMBDA_NOT_SUPPORTED = 'Lambda not supported';\nfunction expandedMessage(message, context) {\n    switch (message) {\n        case REFERENCE_TO_NONEXPORTED_CLASS:\n            if (context && context.className) {\n                return `References to a non-exported class are not supported in decorators but ${context.className} was referenced.`;\n            }\n            break;\n        case VARIABLE_NOT_INITIALIZED:\n            return 'Only initialized variables and constants can be referenced in decorators because the value of this variable is needed by the template compiler';\n        case DESTRUCTURE_NOT_SUPPORTED:\n            return 'Referencing an exported destructured variable or constant is not supported in decorators and this value is needed by the template compiler';\n        case COULD_NOT_RESOLVE_TYPE:\n            if (context && context.typeName) {\n                return `Could not resolve type ${context.typeName}`;\n            }\n            break;\n        case FUNCTION_CALL_NOT_SUPPORTED:\n            if (context && context.name) {\n                return `Function calls are not supported in decorators but '${context.name}' was called`;\n            }\n            return 'Function calls are not supported in decorators';\n        case REFERENCE_TO_LOCAL_SYMBOL:\n            if (context && context.name) {\n                return `Reference to a local (non-exported) symbols are not supported in decorators but '${context.name}' was referenced`;\n            }\n            break;\n        case LAMBDA_NOT_SUPPORTED:\n            return `Function expressions are not supported in decorators`;\n    }\n    return message;\n}\nfunction messageAdvise(message, context) {\n    switch (message) {\n        case REFERENCE_TO_NONEXPORTED_CLASS:\n            if (context && context.className) {\n                return `Consider exporting '${context.className}'`;\n            }\n            break;\n        case DESTRUCTURE_NOT_SUPPORTED:\n            return 'Consider simplifying to avoid destructuring';\n        case REFERENCE_TO_LOCAL_SYMBOL:\n            if (context && context.name) {\n                return `Consider exporting '${context.name}'`;\n            }\n            break;\n        case LAMBDA_NOT_SUPPORTED:\n            return `Consider changing the function expression into an exported function`;\n    }\n    return undefined;\n}\nfunction errorSummary(error) {\n    if (error.summary) {\n        return error.summary;\n    }\n    switch (error.message) {\n        case REFERENCE_TO_NONEXPORTED_CLASS:\n            if (error.context && error.context.className) {\n                return `references non-exported class ${error.context.className}`;\n            }\n            break;\n        case VARIABLE_NOT_INITIALIZED:\n            return 'is not initialized';\n        case DESTRUCTURE_NOT_SUPPORTED:\n            return 'is a destructured variable';\n        case COULD_NOT_RESOLVE_TYPE:\n            return 'could not be resolved';\n        case FUNCTION_CALL_NOT_SUPPORTED:\n            if (error.context && error.context.name) {\n                return `calls '${error.context.name}'`;\n            }\n            return `calls a function`;\n        case REFERENCE_TO_LOCAL_SYMBOL:\n            if (error.context && error.context.name) {\n                return `references local variable ${error.context.name}`;\n            }\n            return `references a local variable`;\n    }\n    return 'contains the error';\n}\nfunction mapStringMap(input, transform) {\n    if (!input)\n        return {};\n    const result = {};\n    Object.keys(input).forEach((key) => {\n        const value = transform(input[key], key);\n        if (!shouldIgnore(value)) {\n            if (HIDDEN_KEY.test(key)) {\n                Object.defineProperty(result, key, { enumerable: false, configurable: true, value: value });\n            }\n            else {\n                result[key] = value;\n            }\n        }\n    });\n    return result;\n}\nfunction isPrimitive(o) {\n    return o === null || (typeof o !== 'function' && typeof o !== 'object');\n}\nclass BindingScope$1 {\n    static build() {\n        const current = new Map();\n        return {\n            define: function (name, value) {\n                current.set(name, value);\n                return this;\n            },\n            done: function () {\n                return current.size > 0 ? new PopulatedScope(current) : BindingScope$1.empty;\n            }\n        };\n    }\n}\nBindingScope$1.missing = {};\nBindingScope$1.empty = { resolve: name => BindingScope$1.missing };\nclass PopulatedScope extends BindingScope$1 {\n    constructor(bindings) {\n        super();\n        this.bindings = bindings;\n    }\n    resolve(name) {\n        return this.bindings.has(name) ? this.bindings.get(name) : BindingScope$1.missing;\n    }\n}\nfunction formatMetadataMessageChain(chain, advise) {\n    const expanded = expandedMessage(chain.message, chain.context);\n    const nesting = chain.symbol ? ` in '${chain.symbol.name}'` : '';\n    const message = `${expanded}${nesting}`;\n    const position = chain.position;\n    const next = chain.next ?\n        formatMetadataMessageChain(chain.next, advise) :\n        advise ? { message: advise } : undefined;\n    return { message, position, next: next ? [next] : undefined };\n}\nfunction formatMetadataError(e, context) {\n    if (isMetadataError(e)) {\n        // Produce a formatted version of the and leaving enough information in the original error\n        // to recover the formatting information to eventually produce a diagnostic error message.\n        const position = e.position;\n        const chain = {\n            message: `Error during template compile of '${context.name}'`,\n            position: position,\n            next: { message: e.message, next: e.chain, context: e.context, symbol: e.symbol }\n        };\n        const advise = e.advise || messageAdvise(e.message, e.context);\n        return formattedError(formatMetadataMessageChain(chain, advise));\n    }\n    return e;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass AotSummaryResolver {\n    constructor(host, staticSymbolCache) {\n        this.host = host;\n        this.staticSymbolCache = staticSymbolCache;\n        // Note: this will only contain StaticSymbols without members!\n        this.summaryCache = new Map();\n        this.loadedFilePaths = new Map();\n        // Note: this will only contain StaticSymbols without members!\n        this.importAs = new Map();\n        this.knownFileNameToModuleNames = new Map();\n    }\n    isLibraryFile(filePath) {\n        // Note: We need to strip the .ngfactory. file path,\n        // so this method also works for generated files\n        // (for which host.isSourceFile will always return false).\n        return !this.host.isSourceFile(stripGeneratedFileSuffix(filePath));\n    }\n    toSummaryFileName(filePath, referringSrcFileName) {\n        return this.host.toSummaryFileName(filePath, referringSrcFileName);\n    }\n    fromSummaryFileName(fileName, referringLibFileName) {\n        return this.host.fromSummaryFileName(fileName, referringLibFileName);\n    }\n    resolveSummary(staticSymbol) {\n        const rootSymbol = staticSymbol.members.length ?\n            this.staticSymbolCache.get(staticSymbol.filePath, staticSymbol.name) :\n            staticSymbol;\n        let summary = this.summaryCache.get(rootSymbol);\n        if (!summary) {\n            this._loadSummaryFile(staticSymbol.filePath);\n            summary = this.summaryCache.get(staticSymbol);\n        }\n        return (rootSymbol === staticSymbol && summary) || null;\n    }\n    getSymbolsOf(filePath) {\n        if (this._loadSummaryFile(filePath)) {\n            return Array.from(this.summaryCache.keys()).filter((symbol) => symbol.filePath === filePath);\n        }\n        return null;\n    }\n    getImportAs(staticSymbol) {\n        staticSymbol.assertNoMembers();\n        return this.importAs.get(staticSymbol);\n    }\n    /**\n     * Converts a file path to a module name that can be used as an `import`.\n     */\n    getKnownModuleName(importedFilePath) {\n        return this.knownFileNameToModuleNames.get(importedFilePath) || null;\n    }\n    addSummary(summary) {\n        this.summaryCache.set(summary.symbol, summary);\n    }\n    _loadSummaryFile(filePath) {\n        let hasSummary = this.loadedFilePaths.get(filePath);\n        if (hasSummary != null) {\n            return hasSummary;\n        }\n        let json = null;\n        if (this.isLibraryFile(filePath)) {\n            const summaryFilePath = summaryFileName(filePath);\n            try {\n                json = this.host.loadSummary(summaryFilePath);\n            }\n            catch (e) {\n                console.error(`Error loading summary file ${summaryFilePath}`);\n                throw e;\n            }\n        }\n        hasSummary = json != null;\n        this.loadedFilePaths.set(filePath, hasSummary);\n        if (json) {\n            const { moduleName, summaries, importAs } = deserializeSummaries(this.staticSymbolCache, this, filePath, json);\n            summaries.forEach((summary) => this.summaryCache.set(summary.symbol, summary));\n            if (moduleName) {\n                this.knownFileNameToModuleNames.set(filePath, moduleName);\n            }\n            importAs.forEach((importAs) => {\n                this.importAs.set(importAs.symbol, importAs.importAs);\n            });\n        }\n        return hasSummary;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction createAotUrlResolver(host) {\n    return {\n        resolve: (basePath, url) => {\n            const filePath = host.resourceNameToFileName(url, basePath);\n            if (!filePath) {\n                throw syntaxError(`Couldn't resolve resource ${url} from ${basePath}`);\n            }\n            return filePath;\n        }\n    };\n}\n/**\n * Creates a new AotCompiler based on options and a host.\n */\nfunction createAotCompiler(compilerHost, options, errorCollector) {\n    let translations = options.translations || '';\n    const urlResolver = createAotUrlResolver(compilerHost);\n    const symbolCache = new StaticSymbolCache();\n    const summaryResolver = new AotSummaryResolver(compilerHost, symbolCache);\n    const symbolResolver = new StaticSymbolResolver(compilerHost, symbolCache, summaryResolver);\n    const staticReflector = new StaticReflector(summaryResolver, symbolResolver, [], [], errorCollector);\n    let htmlParser;\n    if (!!options.enableIvy) {\n        // Ivy handles i18n at the compiler level so we must use a regular parser\n        htmlParser = new HtmlParser();\n    }\n    else {\n        htmlParser = new I18NHtmlParser(new HtmlParser(), translations, options.i18nFormat, options.missingTranslation, console);\n    }\n    const config = new CompilerConfig({\n        defaultEncapsulation: ViewEncapsulation.Emulated,\n        useJit: false,\n        missingTranslation: options.missingTranslation,\n        preserveWhitespaces: options.preserveWhitespaces,\n        strictInjectionParameters: options.strictInjectionParameters,\n    });\n    const normalizer = new DirectiveNormalizer({ get: (url) => compilerHost.loadResource(url) }, urlResolver, htmlParser, config);\n    const expressionParser = new Parser$1(new Lexer());\n    const elementSchemaRegistry = new DomElementSchemaRegistry();\n    const tmplParser = new TemplateParser(config, staticReflector, expressionParser, elementSchemaRegistry, htmlParser, console, []);\n    const resolver = new CompileMetadataResolver(config, htmlParser, new NgModuleResolver(staticReflector), new DirectiveResolver(staticReflector), new PipeResolver(staticReflector), summaryResolver, elementSchemaRegistry, normalizer, console, symbolCache, staticReflector, errorCollector);\n    // TODO(vicb): do not pass options.i18nFormat here\n    const viewCompiler = new ViewCompiler(staticReflector);\n    const typeCheckCompiler = new TypeCheckCompiler(options, staticReflector);\n    const compiler = new AotCompiler(config, options, compilerHost, staticReflector, resolver, tmplParser, new StyleCompiler(urlResolver), viewCompiler, typeCheckCompiler, new NgModuleCompiler(staticReflector), new InjectableCompiler(staticReflector, !!options.enableIvy), new TypeScriptEmitter(), summaryResolver, symbolResolver);\n    return { compiler, reflector: staticReflector };\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nclass SummaryResolver {\n}\nclass JitSummaryResolver {\n    constructor() {\n        this._summaries = new Map();\n    }\n    isLibraryFile() {\n        return false;\n    }\n    toSummaryFileName(fileName) {\n        return fileName;\n    }\n    fromSummaryFileName(fileName) {\n        return fileName;\n    }\n    resolveSummary(reference) {\n        return this._summaries.get(reference) || null;\n    }\n    getSymbolsOf() {\n        return [];\n    }\n    getImportAs(reference) {\n        return reference;\n    }\n    getKnownModuleName(fileName) {\n        return null;\n    }\n    addSummary(summary) {\n        this._summaries.set(summary.symbol, summary);\n    }\n}\n\nfunction interpretStatements(statements, reflector) {\n    const ctx = new _ExecutionContext(null, null, null, new Map());\n    const visitor = new StatementInterpreter(reflector);\n    visitor.visitAllStatements(statements, ctx);\n    const result = {};\n    ctx.exports.forEach((exportName) => {\n        result[exportName] = ctx.vars.get(exportName);\n    });\n    return result;\n}\nfunction _executeFunctionStatements(varNames, varValues, statements, ctx, visitor) {\n    const childCtx = ctx.createChildWihtLocalVars();\n    for (let i = 0; i < varNames.length; i++) {\n        childCtx.vars.set(varNames[i], varValues[i]);\n    }\n    const result = visitor.visitAllStatements(statements, childCtx);\n    return result ? result.value : null;\n}\nclass _ExecutionContext {\n    constructor(parent, instance, className, vars) {\n        this.parent = parent;\n        this.instance = instance;\n        this.className = className;\n        this.vars = vars;\n        this.exports = [];\n    }\n    createChildWihtLocalVars() {\n        return new _ExecutionContext(this, this.instance, this.className, new Map());\n    }\n}\nclass ReturnValue {\n    constructor(value) {\n        this.value = value;\n    }\n}\nfunction createDynamicClass(_classStmt, _ctx, _visitor) {\n    const propertyDescriptors = {};\n    _classStmt.getters.forEach((getter) => {\n        // Note: use `function` instead of arrow function to capture `this`\n        propertyDescriptors[getter.name] = {\n            configurable: false,\n            get: function () {\n                const instanceCtx = new _ExecutionContext(_ctx, this, _classStmt.name, _ctx.vars);\n                return _executeFunctionStatements([], [], getter.body, instanceCtx, _visitor);\n            }\n        };\n    });\n    _classStmt.methods.forEach(function (method) {\n        const paramNames = method.params.map(param => param.name);\n        // Note: use `function` instead of arrow function to capture `this`\n        propertyDescriptors[method.name] = {\n            writable: false,\n            configurable: false,\n            value: function (...args) {\n                const instanceCtx = new _ExecutionContext(_ctx, this, _classStmt.name, _ctx.vars);\n                return _executeFunctionStatements(paramNames, args, method.body, instanceCtx, _visitor);\n            }\n        };\n    });\n    const ctorParamNames = _classStmt.constructorMethod.params.map(param => param.name);\n    // Note: use `function` instead of arrow function to capture `this`\n    const ctor = function (...args) {\n        const instanceCtx = new _ExecutionContext(_ctx, this, _classStmt.name, _ctx.vars);\n        _classStmt.fields.forEach((field) => {\n            this[field.name] = undefined;\n        });\n        _executeFunctionStatements(ctorParamNames, args, _classStmt.constructorMethod.body, instanceCtx, _visitor);\n    };\n    const superClass = _classStmt.parent ? _classStmt.parent.visitExpression(_visitor, _ctx) : Object;\n    ctor.prototype = Object.create(superClass.prototype, propertyDescriptors);\n    return ctor;\n}\nclass StatementInterpreter {\n    constructor(reflector) {\n        this.reflector = reflector;\n    }\n    debugAst(ast) {\n        return debugOutputAstAsTypeScript(ast);\n    }\n    visitDeclareVarStmt(stmt, ctx) {\n        const initialValue = stmt.value ? stmt.value.visitExpression(this, ctx) : undefined;\n        ctx.vars.set(stmt.name, initialValue);\n        if (stmt.hasModifier(StmtModifier.Exported)) {\n            ctx.exports.push(stmt.name);\n        }\n        return null;\n    }\n    visitWriteVarExpr(expr, ctx) {\n        const value = expr.value.visitExpression(this, ctx);\n        let currCtx = ctx;\n        while (currCtx != null) {\n            if (currCtx.vars.has(expr.name)) {\n                currCtx.vars.set(expr.name, value);\n                return value;\n            }\n            currCtx = currCtx.parent;\n        }\n        throw new Error(`Not declared variable ${expr.name}`);\n    }\n    visitWrappedNodeExpr(ast, ctx) {\n        throw new Error('Cannot interpret a WrappedNodeExpr.');\n    }\n    visitTypeofExpr(ast, ctx) {\n        throw new Error('Cannot interpret a TypeofExpr');\n    }\n    visitReadVarExpr(ast, ctx) {\n        let varName = ast.name;\n        if (ast.builtin != null) {\n            switch (ast.builtin) {\n                case BuiltinVar.Super:\n                    return Object.getPrototypeOf(ctx.instance);\n                case BuiltinVar.This:\n                    return ctx.instance;\n                case BuiltinVar.CatchError:\n                    varName = CATCH_ERROR_VAR$2;\n                    break;\n                case BuiltinVar.CatchStack:\n                    varName = CATCH_STACK_VAR$2;\n                    break;\n                default:\n                    throw new Error(`Unknown builtin variable ${ast.builtin}`);\n            }\n        }\n        let currCtx = ctx;\n        while (currCtx != null) {\n            if (currCtx.vars.has(varName)) {\n                return currCtx.vars.get(varName);\n            }\n            currCtx = currCtx.parent;\n        }\n        throw new Error(`Not declared variable ${varName}`);\n    }\n    visitWriteKeyExpr(expr, ctx) {\n        const receiver = expr.receiver.visitExpression(this, ctx);\n        const index = expr.index.visitExpression(this, ctx);\n        const value = expr.value.visitExpression(this, ctx);\n        receiver[index] = value;\n        return value;\n    }\n    visitWritePropExpr(expr, ctx) {\n        const receiver = expr.receiver.visitExpression(this, ctx);\n        const value = expr.value.visitExpression(this, ctx);\n        receiver[expr.name] = value;\n        return value;\n    }\n    visitInvokeMethodExpr(expr, ctx) {\n        const receiver = expr.receiver.visitExpression(this, ctx);\n        const args = this.visitAllExpressions(expr.args, ctx);\n        let result;\n        if (expr.builtin != null) {\n            switch (expr.builtin) {\n                case BuiltinMethod.ConcatArray:\n                    result = receiver.concat(...args);\n                    break;\n                case BuiltinMethod.SubscribeObservable:\n                    result = receiver.subscribe({ next: args[0] });\n                    break;\n                case BuiltinMethod.Bind:\n                    result = receiver.bind(...args);\n                    break;\n                default:\n                    throw new Error(`Unknown builtin method ${expr.builtin}`);\n            }\n        }\n        else {\n            result = receiver[expr.name].apply(receiver, args);\n        }\n        return result;\n    }\n    visitInvokeFunctionExpr(stmt, ctx) {\n        const args = this.visitAllExpressions(stmt.args, ctx);\n        const fnExpr = stmt.fn;\n        if (fnExpr instanceof ReadVarExpr && fnExpr.builtin === BuiltinVar.Super) {\n            ctx.instance.constructor.prototype.constructor.apply(ctx.instance, args);\n            return null;\n        }\n        else {\n            const fn = stmt.fn.visitExpression(this, ctx);\n            return fn.apply(null, args);\n        }\n    }\n    visitReturnStmt(stmt, ctx) {\n        return new ReturnValue(stmt.value.visitExpression(this, ctx));\n    }\n    visitDeclareClassStmt(stmt, ctx) {\n        const clazz = createDynamicClass(stmt, ctx, this);\n        ctx.vars.set(stmt.name, clazz);\n        if (stmt.hasModifier(StmtModifier.Exported)) {\n            ctx.exports.push(stmt.name);\n        }\n        return null;\n    }\n    visitExpressionStmt(stmt, ctx) {\n        return stmt.expr.visitExpression(this, ctx);\n    }\n    visitIfStmt(stmt, ctx) {\n        const condition = stmt.condition.visitExpression(this, ctx);\n        if (condition) {\n            return this.visitAllStatements(stmt.trueCase, ctx);\n        }\n        else if (stmt.falseCase != null) {\n            return this.visitAllStatements(stmt.falseCase, ctx);\n        }\n        return null;\n    }\n    visitTryCatchStmt(stmt, ctx) {\n        try {\n            return this.visitAllStatements(stmt.bodyStmts, ctx);\n        }\n        catch (e) {\n            const childCtx = ctx.createChildWihtLocalVars();\n            childCtx.vars.set(CATCH_ERROR_VAR$2, e);\n            childCtx.vars.set(CATCH_STACK_VAR$2, e.stack);\n            return this.visitAllStatements(stmt.catchStmts, childCtx);\n        }\n    }\n    visitThrowStmt(stmt, ctx) {\n        throw stmt.error.visitExpression(this, ctx);\n    }\n    visitInstantiateExpr(ast, ctx) {\n        const args = this.visitAllExpressions(ast.args, ctx);\n        const clazz = ast.classExpr.visitExpression(this, ctx);\n        return new clazz(...args);\n    }\n    visitLiteralExpr(ast, ctx) {\n        return ast.value;\n    }\n    visitLocalizedString(ast, context) {\n        return null;\n    }\n    visitExternalExpr(ast, ctx) {\n        return this.reflector.resolveExternalReference(ast.value);\n    }\n    visitConditionalExpr(ast, ctx) {\n        if (ast.condition.visitExpression(this, ctx)) {\n            return ast.trueCase.visitExpression(this, ctx);\n        }\n        else if (ast.falseCase != null) {\n            return ast.falseCase.visitExpression(this, ctx);\n        }\n        return null;\n    }\n    visitNotExpr(ast, ctx) {\n        return !ast.condition.visitExpression(this, ctx);\n    }\n    visitAssertNotNullExpr(ast, ctx) {\n        return ast.condition.visitExpression(this, ctx);\n    }\n    visitCastExpr(ast, ctx) {\n        return ast.value.visitExpression(this, ctx);\n    }\n    visitFunctionExpr(ast, ctx) {\n        const paramNames = ast.params.map((param) => param.name);\n        return _declareFn(paramNames, ast.statements, ctx, this);\n    }\n    visitDeclareFunctionStmt(stmt, ctx) {\n        const paramNames = stmt.params.map((param) => param.name);\n        ctx.vars.set(stmt.name, _declareFn(paramNames, stmt.statements, ctx, this));\n        if (stmt.hasModifier(StmtModifier.Exported)) {\n            ctx.exports.push(stmt.name);\n        }\n        return null;\n    }\n    visitUnaryOperatorExpr(ast, ctx) {\n        const rhs = () => ast.expr.visitExpression(this, ctx);\n        switch (ast.operator) {\n            case UnaryOperator.Plus:\n                return +rhs();\n            case UnaryOperator.Minus:\n                return -rhs();\n            default:\n                throw new Error(`Unknown operator ${ast.operator}`);\n        }\n    }\n    visitBinaryOperatorExpr(ast, ctx) {\n        const lhs = () => ast.lhs.visitExpression(this, ctx);\n        const rhs = () => ast.rhs.visitExpression(this, ctx);\n        switch (ast.operator) {\n            case BinaryOperator.Equals:\n                return lhs() == rhs();\n            case BinaryOperator.Identical:\n                return lhs() === rhs();\n            case BinaryOperator.NotEquals:\n                return lhs() != rhs();\n            case BinaryOperator.NotIdentical:\n                return lhs() !== rhs();\n            case BinaryOperator.And:\n                return lhs() && rhs();\n            case BinaryOperator.Or:\n                return lhs() || rhs();\n            case BinaryOperator.Plus:\n                return lhs() + rhs();\n            case BinaryOperator.Minus:\n                return lhs() - rhs();\n            case BinaryOperator.Divide:\n                return lhs() / rhs();\n            case BinaryOperator.Multiply:\n                return lhs() * rhs();\n            case BinaryOperator.Modulo:\n                return lhs() % rhs();\n            case BinaryOperator.Lower:\n                return lhs() < rhs();\n            case BinaryOperator.LowerEquals:\n                return lhs() <= rhs();\n            case BinaryOperator.Bigger:\n                return lhs() > rhs();\n            case BinaryOperator.BiggerEquals:\n                return lhs() >= rhs();\n            default:\n                throw new Error(`Unknown operator ${ast.operator}`);\n        }\n    }\n    visitReadPropExpr(ast, ctx) {\n        let result;\n        const receiver = ast.receiver.visitExpression(this, ctx);\n        result = receiver[ast.name];\n        return result;\n    }\n    visitReadKeyExpr(ast, ctx) {\n        const receiver = ast.receiver.visitExpression(this, ctx);\n        const prop = ast.index.visitExpression(this, ctx);\n        return receiver[prop];\n    }\n    visitLiteralArrayExpr(ast, ctx) {\n        return this.visitAllExpressions(ast.entries, ctx);\n    }\n    visitLiteralMapExpr(ast, ctx) {\n        const result = {};\n        ast.entries.forEach(entry => result[entry.key] = entry.value.visitExpression(this, ctx));\n        return result;\n    }\n    visitCommaExpr(ast, context) {\n        const values = this.visitAllExpressions(ast.parts, context);\n        return values[values.length - 1];\n    }\n    visitAllExpressions(expressions, ctx) {\n        return expressions.map((expr) => expr.visitExpression(this, ctx));\n    }\n    visitAllStatements(statements, ctx) {\n        for (let i = 0; i < statements.length; i++) {\n            const stmt = statements[i];\n            const val = stmt.visitStatement(this, ctx);\n            if (val instanceof ReturnValue) {\n                return val;\n            }\n        }\n        return null;\n    }\n}\nfunction _declareFn(varNames, statements, ctx, visitor) {\n    return (...args) => _executeFunctionStatements(varNames, args, statements, ctx, visitor);\n}\nconst CATCH_ERROR_VAR$2 = 'error';\nconst CATCH_STACK_VAR$2 = 'stack';\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * An internal module of the Angular compiler that begins with component types,\n * extracts templates, and eventually produces a compiled version of the component\n * ready for linking into an application.\n *\n * @security  When compiling templates at runtime, you must ensure that the entire template comes\n * from a trusted source. Attacker-controlled data introduced by a template could expose your\n * application to XSS risks.  For more detail, see the [Security Guide](http://g.co/ng/security).\n */\nclass JitCompiler {\n    constructor(_metadataResolver, _templateParser, _styleCompiler, _viewCompiler, _ngModuleCompiler, _summaryResolver, _reflector, _jitEvaluator, _compilerConfig, _console, getExtraNgModuleProviders) {\n        this._metadataResolver = _metadataResolver;\n        this._templateParser = _templateParser;\n        this._styleCompiler = _styleCompiler;\n        this._viewCompiler = _viewCompiler;\n        this._ngModuleCompiler = _ngModuleCompiler;\n        this._summaryResolver = _summaryResolver;\n        this._reflector = _reflector;\n        this._jitEvaluator = _jitEvaluator;\n        this._compilerConfig = _compilerConfig;\n        this._console = _console;\n        this.getExtraNgModuleProviders = getExtraNgModuleProviders;\n        this._compiledTemplateCache = new Map();\n        this._compiledHostTemplateCache = new Map();\n        this._compiledDirectiveWrapperCache = new Map();\n        this._compiledNgModuleCache = new Map();\n        this._sharedStylesheetCount = 0;\n        this._addedAotSummaries = new Set();\n    }\n    compileModuleSync(moduleType) {\n        return SyncAsync.assertSync(this._compileModuleAndComponents(moduleType, true));\n    }\n    compileModuleAsync(moduleType) {\n        return Promise.resolve(this._compileModuleAndComponents(moduleType, false));\n    }\n    compileModuleAndAllComponentsSync(moduleType) {\n        return SyncAsync.assertSync(this._compileModuleAndAllComponents(moduleType, true));\n    }\n    compileModuleAndAllComponentsAsync(moduleType) {\n        return Promise.resolve(this._compileModuleAndAllComponents(moduleType, false));\n    }\n    getComponentFactory(component) {\n        const summary = this._metadataResolver.getDirectiveSummary(component);\n        return summary.componentFactory;\n    }\n    loadAotSummaries(summaries) {\n        this.clearCache();\n        this._addAotSummaries(summaries);\n    }\n    _addAotSummaries(fn) {\n        if (this._addedAotSummaries.has(fn)) {\n            return;\n        }\n        this._addedAotSummaries.add(fn);\n        const summaries = fn();\n        for (let i = 0; i < summaries.length; i++) {\n            const entry = summaries[i];\n            if (typeof entry === 'function') {\n                this._addAotSummaries(entry);\n            }\n            else {\n                const summary = entry;\n                this._summaryResolver.addSummary({ symbol: summary.type.reference, metadata: null, type: summary });\n            }\n        }\n    }\n    hasAotSummary(ref) {\n        return !!this._summaryResolver.resolveSummary(ref);\n    }\n    _filterJitIdentifiers(ids) {\n        return ids.map(mod => mod.reference).filter((ref) => !this.hasAotSummary(ref));\n    }\n    _compileModuleAndComponents(moduleType, isSync) {\n        return SyncAsync.then(this._loadModules(moduleType, isSync), () => {\n            this._compileComponents(moduleType, null);\n            return this._compileModule(moduleType);\n        });\n    }\n    _compileModuleAndAllComponents(moduleType, isSync) {\n        return SyncAsync.then(this._loadModules(moduleType, isSync), () => {\n            const componentFactories = [];\n            this._compileComponents(moduleType, componentFactories);\n            return {\n                ngModuleFactory: this._compileModule(moduleType),\n                componentFactories: componentFactories\n            };\n        });\n    }\n    _loadModules(mainModule, isSync) {\n        const loading = [];\n        const mainNgModule = this._metadataResolver.getNgModuleMetadata(mainModule);\n        // Note: for runtime compilation, we want to transitively compile all modules,\n        // so we also need to load the declared directives / pipes for all nested modules.\n        this._filterJitIdentifiers(mainNgModule.transitiveModule.modules).forEach((nestedNgModule) => {\n            // getNgModuleMetadata only returns null if the value passed in is not an NgModule\n            const moduleMeta = this._metadataResolver.getNgModuleMetadata(nestedNgModule);\n            this._filterJitIdentifiers(moduleMeta.declaredDirectives).forEach((ref) => {\n                const promise = this._metadataResolver.loadDirectiveMetadata(moduleMeta.type.reference, ref, isSync);\n                if (promise) {\n                    loading.push(promise);\n                }\n            });\n            this._filterJitIdentifiers(moduleMeta.declaredPipes)\n                .forEach((ref) => this._metadataResolver.getOrLoadPipeMetadata(ref));\n        });\n        return SyncAsync.all(loading);\n    }\n    _compileModule(moduleType) {\n        let ngModuleFactory = this._compiledNgModuleCache.get(moduleType);\n        if (!ngModuleFactory) {\n            const moduleMeta = this._metadataResolver.getNgModuleMetadata(moduleType);\n            // Always provide a bound Compiler\n            const extraProviders = this.getExtraNgModuleProviders(moduleMeta.type.reference);\n            const outputCtx = createOutputContext();\n            const compileResult = this._ngModuleCompiler.compile(outputCtx, moduleMeta, extraProviders);\n            ngModuleFactory = this._interpretOrJit(ngModuleJitUrl(moduleMeta), outputCtx.statements)[compileResult.ngModuleFactoryVar];\n            this._compiledNgModuleCache.set(moduleMeta.type.reference, ngModuleFactory);\n        }\n        return ngModuleFactory;\n    }\n    /**\n     * @internal\n     */\n    _compileComponents(mainModule, allComponentFactories) {\n        const ngModule = this._metadataResolver.getNgModuleMetadata(mainModule);\n        const moduleByJitDirective = new Map();\n        const templates = new Set();\n        const transJitModules = this._filterJitIdentifiers(ngModule.transitiveModule.modules);\n        transJitModules.forEach((localMod) => {\n            const localModuleMeta = this._metadataResolver.getNgModuleMetadata(localMod);\n            this._filterJitIdentifiers(localModuleMeta.declaredDirectives).forEach((dirRef) => {\n                moduleByJitDirective.set(dirRef, localModuleMeta);\n                const dirMeta = this._metadataResolver.getDirectiveMetadata(dirRef);\n                if (dirMeta.isComponent) {\n                    templates.add(this._createCompiledTemplate(dirMeta, localModuleMeta));\n                    if (allComponentFactories) {\n                        const template = this._createCompiledHostTemplate(dirMeta.type.reference, localModuleMeta);\n                        templates.add(template);\n                        allComponentFactories.push(dirMeta.componentFactory);\n                    }\n                }\n            });\n        });\n        transJitModules.forEach((localMod) => {\n            const localModuleMeta = this._metadataResolver.getNgModuleMetadata(localMod);\n            this._filterJitIdentifiers(localModuleMeta.declaredDirectives).forEach((dirRef) => {\n                const dirMeta = this._metadataResolver.getDirectiveMetadata(dirRef);\n                if (dirMeta.isComponent) {\n                    dirMeta.entryComponents.forEach((entryComponentType) => {\n                        const moduleMeta = moduleByJitDirective.get(entryComponentType.componentType);\n                        templates.add(this._createCompiledHostTemplate(entryComponentType.componentType, moduleMeta));\n                    });\n                }\n            });\n            localModuleMeta.entryComponents.forEach((entryComponentType) => {\n                if (!this.hasAotSummary(entryComponentType.componentType)) {\n                    const moduleMeta = moduleByJitDirective.get(entryComponentType.componentType);\n                    templates.add(this._createCompiledHostTemplate(entryComponentType.componentType, moduleMeta));\n                }\n            });\n        });\n        templates.forEach((template) => this._compileTemplate(template));\n    }\n    clearCacheFor(type) {\n        this._compiledNgModuleCache.delete(type);\n        this._metadataResolver.clearCacheFor(type);\n        this._compiledHostTemplateCache.delete(type);\n        const compiledTemplate = this._compiledTemplateCache.get(type);\n        if (compiledTemplate) {\n            this._compiledTemplateCache.delete(type);\n        }\n    }\n    clearCache() {\n        // Note: don't clear the _addedAotSummaries, as they don't change!\n        this._metadataResolver.clearCache();\n        this._compiledTemplateCache.clear();\n        this._compiledHostTemplateCache.clear();\n        this._compiledNgModuleCache.clear();\n    }\n    _createCompiledHostTemplate(compType, ngModule) {\n        if (!ngModule) {\n            throw new Error(`Component ${stringify(compType)} is not part of any NgModule or the module has not been imported into your module.`);\n        }\n        let compiledTemplate = this._compiledHostTemplateCache.get(compType);\n        if (!compiledTemplate) {\n            const compMeta = this._metadataResolver.getDirectiveMetadata(compType);\n            assertComponent(compMeta);\n            const hostMeta = this._metadataResolver.getHostComponentMetadata(compMeta, compMeta.componentFactory.viewDefFactory);\n            compiledTemplate =\n                new CompiledTemplate(true, compMeta.type, hostMeta, ngModule, [compMeta.type]);\n            this._compiledHostTemplateCache.set(compType, compiledTemplate);\n        }\n        return compiledTemplate;\n    }\n    _createCompiledTemplate(compMeta, ngModule) {\n        let compiledTemplate = this._compiledTemplateCache.get(compMeta.type.reference);\n        if (!compiledTemplate) {\n            assertComponent(compMeta);\n            compiledTemplate = new CompiledTemplate(false, compMeta.type, compMeta, ngModule, ngModule.transitiveModule.directives);\n            this._compiledTemplateCache.set(compMeta.type.reference, compiledTemplate);\n        }\n        return compiledTemplate;\n    }\n    _compileTemplate(template) {\n        if (template.isCompiled) {\n            return;\n        }\n        const compMeta = template.compMeta;\n        const externalStylesheetsByModuleUrl = new Map();\n        const outputContext = createOutputContext();\n        const componentStylesheet = this._styleCompiler.compileComponent(outputContext, compMeta);\n        compMeta.template.externalStylesheets.forEach((stylesheetMeta) => {\n            const compiledStylesheet = this._styleCompiler.compileStyles(createOutputContext(), compMeta, stylesheetMeta);\n            externalStylesheetsByModuleUrl.set(stylesheetMeta.moduleUrl, compiledStylesheet);\n        });\n        this._resolveStylesCompileResult(componentStylesheet, externalStylesheetsByModuleUrl);\n        const pipes = template.ngModule.transitiveModule.pipes.map(pipe => this._metadataResolver.getPipeSummary(pipe.reference));\n        const { template: parsedTemplate, pipes: usedPipes } = this._parseTemplate(compMeta, template.ngModule, template.directives);\n        const compileResult = this._viewCompiler.compileComponent(outputContext, compMeta, parsedTemplate, variable(componentStylesheet.stylesVar), usedPipes);\n        const evalResult = this._interpretOrJit(templateJitUrl(template.ngModule.type, template.compMeta), outputContext.statements);\n        const viewClass = evalResult[compileResult.viewClassVar];\n        const rendererType = evalResult[compileResult.rendererTypeVar];\n        template.compiled(viewClass, rendererType);\n    }\n    _parseTemplate(compMeta, ngModule, directiveIdentifiers) {\n        // Note: ! is ok here as components always have a template.\n        const preserveWhitespaces = compMeta.template.preserveWhitespaces;\n        const directives = directiveIdentifiers.map(dir => this._metadataResolver.getDirectiveSummary(dir.reference));\n        const pipes = ngModule.transitiveModule.pipes.map(pipe => this._metadataResolver.getPipeSummary(pipe.reference));\n        return this._templateParser.parse(compMeta, compMeta.template.htmlAst, directives, pipes, ngModule.schemas, templateSourceUrl(ngModule.type, compMeta, compMeta.template), preserveWhitespaces);\n    }\n    _resolveStylesCompileResult(result, externalStylesheetsByModuleUrl) {\n        result.dependencies.forEach((dep, i) => {\n            const nestedCompileResult = externalStylesheetsByModuleUrl.get(dep.moduleUrl);\n            const nestedStylesArr = this._resolveAndEvalStylesCompileResult(nestedCompileResult, externalStylesheetsByModuleUrl);\n            dep.setValue(nestedStylesArr);\n        });\n    }\n    _resolveAndEvalStylesCompileResult(result, externalStylesheetsByModuleUrl) {\n        this._resolveStylesCompileResult(result, externalStylesheetsByModuleUrl);\n        return this._interpretOrJit(sharedStylesheetJitUrl(result.meta, this._sharedStylesheetCount++), result.outputCtx.statements)[result.stylesVar];\n    }\n    _interpretOrJit(sourceUrl, statements) {\n        if (!this._compilerConfig.useJit) {\n            return interpretStatements(statements, this._reflector);\n        }\n        else {\n            return this._jitEvaluator.evaluateStatements(sourceUrl, statements, this._reflector, this._compilerConfig.jitDevMode);\n        }\n    }\n}\nclass CompiledTemplate {\n    constructor(isHost, compType, compMeta, ngModule, directives) {\n        this.isHost = isHost;\n        this.compType = compType;\n        this.compMeta = compMeta;\n        this.ngModule = ngModule;\n        this.directives = directives;\n        this._viewClass = null;\n        this.isCompiled = false;\n    }\n    compiled(viewClass, rendererType) {\n        this._viewClass = viewClass;\n        this.compMeta.componentViewType.setDelegate(viewClass);\n        for (let prop in rendererType) {\n            this.compMeta.rendererType[prop] = rendererType[prop];\n        }\n        this.isCompiled = true;\n    }\n}\nfunction assertComponent(meta) {\n    if (!meta.isComponent) {\n        throw new Error(`Could not compile '${identifierName(meta.type)}' because it is not a component.`);\n    }\n}\nfunction createOutputContext() {\n    const importExpr$1 = (symbol) => importExpr({ name: identifierName(symbol), moduleName: null, runtime: symbol });\n    return { statements: [], genFilePath: '', importExpr: importExpr$1, constantPool: new ConstantPool() };\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Provides access to reflection data about symbols that the compiler needs.\n */\nclass CompileReflector {\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Create a {@link UrlResolver} with no package prefix.\n */\nfunction createUrlResolverWithoutPackagePrefix() {\n    return new UrlResolver();\n}\nfunction createOfflineCompileUrlResolver() {\n    return new UrlResolver('.');\n}\nconst UrlResolver = class UrlResolverImpl {\n    constructor(_packagePrefix = null) {\n        this._packagePrefix = _packagePrefix;\n    }\n    /**\n     * Resolves the `url` given the `baseUrl`:\n     * - when the `url` is null, the `baseUrl` is returned,\n     * - if `url` is relative ('path/to/here', './path/to/here'), the resolved url is a combination of\n     * `baseUrl` and `url`,\n     * - if `url` is absolute (it has a scheme: 'http://', 'https://' or start with '/'), the `url` is\n     * returned as is (ignoring the `baseUrl`)\n     */\n    resolve(baseUrl, url) {\n        let resolvedUrl = url;\n        if (baseUrl != null && baseUrl.length > 0) {\n            resolvedUrl = _resolveUrl(baseUrl, resolvedUrl);\n        }\n        const resolvedParts = _split(resolvedUrl);\n        let prefix = this._packagePrefix;\n        if (prefix != null && resolvedParts != null &&\n            resolvedParts[_ComponentIndex.Scheme] == 'package') {\n            let path = resolvedParts[_ComponentIndex.Path];\n            prefix = prefix.replace(/\\/+$/, '');\n            path = path.replace(/^\\/+/, '');\n            return `${prefix}/${path}`;\n        }\n        return resolvedUrl;\n    }\n};\n/**\n * Extract the scheme of a URL.\n */\nfunction getUrlScheme(url) {\n    const match = _split(url);\n    return (match && match[_ComponentIndex.Scheme]) || '';\n}\n// The code below is adapted from Traceur:\n// https://github.com/google/traceur-compiler/blob/9511c1dafa972bf0de1202a8a863bad02f0f95a8/src/runtime/url.js\n/**\n * Builds a URI string from already-encoded parts.\n *\n * No encoding is performed.  Any component may be omitted as either null or\n * undefined.\n *\n * @param opt_scheme The scheme such as 'http'.\n * @param opt_userInfo The user name before the '@'.\n * @param opt_domain The domain such as 'www.google.com', already\n *     URI-encoded.\n * @param opt_port The port number.\n * @param opt_path The path, already URI-encoded.  If it is not\n *     empty, it must begin with a slash.\n * @param opt_queryData The URI-encoded query data.\n * @param opt_fragment The URI-encoded fragment identifier.\n * @return The fully combined URI.\n */\nfunction _buildFromEncodedParts(opt_scheme, opt_userInfo, opt_domain, opt_port, opt_path, opt_queryData, opt_fragment) {\n    const out = [];\n    if (opt_scheme != null) {\n        out.push(opt_scheme + ':');\n    }\n    if (opt_domain != null) {\n        out.push('//');\n        if (opt_userInfo != null) {\n            out.push(opt_userInfo + '@');\n        }\n        out.push(opt_domain);\n        if (opt_port != null) {\n            out.push(':' + opt_port);\n        }\n    }\n    if (opt_path != null) {\n        out.push(opt_path);\n    }\n    if (opt_queryData != null) {\n        out.push('?' + opt_queryData);\n    }\n    if (opt_fragment != null) {\n        out.push('#' + opt_fragment);\n    }\n    return out.join('');\n}\n/**\n * A regular expression for breaking a URI into its component parts.\n *\n * {@link http://www.gbiv.com/protocols/uri/rfc/rfc3986.html#RFC2234} says\n * As the \"first-match-wins\" algorithm is identical to the \"greedy\"\n * disambiguation method used by POSIX regular expressions, it is natural and\n * commonplace to use a regular expression for parsing the potential five\n * components of a URI reference.\n *\n * The following line is the regular expression for breaking-down a\n * well-formed URI reference into its components.\n *\n * <pre>\n * ^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\\?([^#]*))?(#(.*))?\n *  12            3  4          5       6  7        8 9\n * </pre>\n *\n * The numbers in the second line above are only to assist readability; they\n * indicate the reference points for each subexpression (i.e., each paired\n * parenthesis). We refer to the value matched for subexpression <n> as $<n>.\n * For example, matching the above expression to\n * <pre>\n *     http://www.ics.uci.edu/pub/ietf/uri/#Related\n * </pre>\n * results in the following subexpression matches:\n * <pre>\n *    $1 = http:\n *    $2 = http\n *    $3 = //www.ics.uci.edu\n *    $4 = www.ics.uci.edu\n *    $5 = /pub/ietf/uri/\n *    $6 = <undefined>\n *    $7 = <undefined>\n *    $8 = #Related\n *    $9 = Related\n * </pre>\n * where <undefined> indicates that the component is not present, as is the\n * case for the query component in the above example. Therefore, we can\n * determine the value of the five components as\n * <pre>\n *    scheme    = $2\n *    authority = $4\n *    path      = $5\n *    query     = $7\n *    fragment  = $9\n * </pre>\n *\n * The regular expression has been modified slightly to expose the\n * userInfo, domain, and port separately from the authority.\n * The modified version yields\n * <pre>\n *    $1 = http              scheme\n *    $2 = <undefined>       userInfo -\\\n *    $3 = www.ics.uci.edu   domain     | authority\n *    $4 = <undefined>       port     -/\n *    $5 = /pub/ietf/uri/    path\n *    $6 = <undefined>       query without ?\n *    $7 = Related           fragment without #\n * </pre>\n * @internal\n */\nconst _splitRe = new RegExp('^' +\n    '(?:' +\n    '([^:/?#.]+)' + // scheme - ignore special characters\n    // used by other URL parts such as :,\n    // ?, /, #, and .\n    ':)?' +\n    '(?://' +\n    '(?:([^/?#]*)@)?' + // userInfo\n    '([\\\\w\\\\d\\\\-\\\\u0100-\\\\uffff.%]*)' + // domain - restrict to letters,\n    // digits, dashes, dots, percent\n    // escapes, and unicode characters.\n    '(?::([0-9]+))?' + // port\n    ')?' +\n    '([^?#]+)?' + // path\n    '(?:\\\\?([^#]*))?' + // query\n    '(?:#(.*))?' + // fragment\n    '$');\n/**\n * The index of each URI component in the return value of goog.uri.utils.split.\n * @enum {number}\n */\nvar _ComponentIndex;\n(function (_ComponentIndex) {\n    _ComponentIndex[_ComponentIndex[\"Scheme\"] = 1] = \"Scheme\";\n    _ComponentIndex[_ComponentIndex[\"UserInfo\"] = 2] = \"UserInfo\";\n    _ComponentIndex[_ComponentIndex[\"Domain\"] = 3] = \"Domain\";\n    _ComponentIndex[_ComponentIndex[\"Port\"] = 4] = \"Port\";\n    _ComponentIndex[_ComponentIndex[\"Path\"] = 5] = \"Path\";\n    _ComponentIndex[_ComponentIndex[\"QueryData\"] = 6] = \"QueryData\";\n    _ComponentIndex[_ComponentIndex[\"Fragment\"] = 7] = \"Fragment\";\n})(_ComponentIndex || (_ComponentIndex = {}));\n/**\n * Splits a URI into its component parts.\n *\n * Each component can be accessed via the component indices; for example:\n * <pre>\n * goog.uri.utils.split(someStr)[goog.uri.utils.CompontentIndex.QUERY_DATA];\n * </pre>\n *\n * @param uri The URI string to examine.\n * @return Each component still URI-encoded.\n *     Each component that is present will contain the encoded value, whereas\n *     components that are not present will be undefined or empty, depending\n *     on the browser's regular expression implementation.  Never null, since\n *     arbitrary strings may still look like path names.\n */\nfunction _split(uri) {\n    return uri.match(_splitRe);\n}\n/**\n * Removes dot segments in given path component, as described in\n * RFC 3986, section 5.2.4.\n *\n * @param path A non-empty path component.\n * @return Path component with removed dot segments.\n */\nfunction _removeDotSegments(path) {\n    if (path == '/')\n        return '/';\n    const leadingSlash = path[0] == '/' ? '/' : '';\n    const trailingSlash = path[path.length - 1] === '/' ? '/' : '';\n    const segments = path.split('/');\n    const out = [];\n    let up = 0;\n    for (let pos = 0; pos < segments.length; pos++) {\n        const segment = segments[pos];\n        switch (segment) {\n            case '':\n            case '.':\n                break;\n            case '..':\n                if (out.length > 0) {\n                    out.pop();\n                }\n                else {\n                    up++;\n                }\n                break;\n            default:\n                out.push(segment);\n        }\n    }\n    if (leadingSlash == '') {\n        while (up-- > 0) {\n            out.unshift('..');\n        }\n        if (out.length === 0)\n            out.push('.');\n    }\n    return leadingSlash + out.join('/') + trailingSlash;\n}\n/**\n * Takes an array of the parts from split and canonicalizes the path part\n * and then joins all the parts.\n */\nfunction _joinAndCanonicalizePath(parts) {\n    let path = parts[_ComponentIndex.Path];\n    path = path == null ? '' : _removeDotSegments(path);\n    parts[_ComponentIndex.Path] = path;\n    return _buildFromEncodedParts(parts[_ComponentIndex.Scheme], parts[_ComponentIndex.UserInfo], parts[_ComponentIndex.Domain], parts[_ComponentIndex.Port], path, parts[_ComponentIndex.QueryData], parts[_ComponentIndex.Fragment]);\n}\n/**\n * Resolves a URL.\n * @param base The URL acting as the base URL.\n * @param to The URL to resolve.\n */\nfunction _resolveUrl(base, url) {\n    const parts = _split(encodeURI(url));\n    const baseParts = _split(base);\n    if (parts[_ComponentIndex.Scheme] != null) {\n        return _joinAndCanonicalizePath(parts);\n    }\n    else {\n        parts[_ComponentIndex.Scheme] = baseParts[_ComponentIndex.Scheme];\n    }\n    for (let i = _ComponentIndex.Scheme; i <= _ComponentIndex.Port; i++) {\n        if (parts[i] == null) {\n            parts[i] = baseParts[i];\n        }\n    }\n    if (parts[_ComponentIndex.Path][0] == '/') {\n        return _joinAndCanonicalizePath(parts);\n    }\n    let path = baseParts[_ComponentIndex.Path];\n    if (path == null)\n        path = '/';\n    const index = path.lastIndexOf('/');\n    path = path.substring(0, index + 1) + parts[_ComponentIndex.Path];\n    parts[_ComponentIndex.Path] = path;\n    return _joinAndCanonicalizePath(parts);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass Extractor {\n    constructor(host, staticSymbolResolver, messageBundle, metadataResolver) {\n        this.host = host;\n        this.staticSymbolResolver = staticSymbolResolver;\n        this.messageBundle = messageBundle;\n        this.metadataResolver = metadataResolver;\n    }\n    extract(rootFiles) {\n        const { files, ngModules } = analyzeAndValidateNgModules(rootFiles, this.host, this.staticSymbolResolver, this.metadataResolver);\n        return Promise\n            .all(ngModules.map(ngModule => this.metadataResolver.loadNgModuleDirectiveAndPipeMetadata(ngModule.type.reference, false)))\n            .then(() => {\n            const errors = [];\n            files.forEach(file => {\n                const compMetas = [];\n                file.directives.forEach(directiveType => {\n                    const dirMeta = this.metadataResolver.getDirectiveMetadata(directiveType);\n                    if (dirMeta && dirMeta.isComponent) {\n                        compMetas.push(dirMeta);\n                    }\n                });\n                compMetas.forEach(compMeta => {\n                    const html = compMeta.template.template;\n                    // Template URL points to either an HTML or TS file depending on\n                    // whether the file is used with `templateUrl:` or `template:`,\n                    // respectively.\n                    const templateUrl = compMeta.template.templateUrl;\n                    const interpolationConfig = InterpolationConfig.fromArray(compMeta.template.interpolation);\n                    errors.push(...this.messageBundle.updateFromTemplate(html, templateUrl, interpolationConfig));\n                });\n            });\n            if (errors.length) {\n                throw new Error(errors.map(e => e.toString()).join('\\n'));\n            }\n            return this.messageBundle;\n        });\n    }\n    static create(host, locale) {\n        const htmlParser = new HtmlParser();\n        const urlResolver = createAotUrlResolver(host);\n        const symbolCache = new StaticSymbolCache();\n        const summaryResolver = new AotSummaryResolver(host, symbolCache);\n        const staticSymbolResolver = new StaticSymbolResolver(host, symbolCache, summaryResolver);\n        const staticReflector = new StaticReflector(summaryResolver, staticSymbolResolver);\n        const config = new CompilerConfig({ defaultEncapsulation: ViewEncapsulation.Emulated, useJit: false });\n        const normalizer = new DirectiveNormalizer({ get: (url) => host.loadResource(url) }, urlResolver, htmlParser, config);\n        const elementSchemaRegistry = new DomElementSchemaRegistry();\n        const resolver = new CompileMetadataResolver(config, htmlParser, new NgModuleResolver(staticReflector), new DirectiveResolver(staticReflector), new PipeResolver(staticReflector), summaryResolver, elementSchemaRegistry, normalizer, console, symbolCache, staticReflector);\n        // TODO(vicb): implicit tags & attributes\n        const messageBundle = new MessageBundle(htmlParser, [], {}, locale);\n        const extractor = new Extractor(host, staticSymbolResolver, messageBundle, resolver);\n        return { extractor, staticReflector };\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Processes `Target`s with a given set of directives and performs a binding operation, which\n * returns an object similar to TypeScript's `ts.TypeChecker` that contains knowledge about the\n * target.\n */\nclass R3TargetBinder {\n    constructor(directiveMatcher) {\n        this.directiveMatcher = directiveMatcher;\n    }\n    /**\n     * Perform a binding operation on the given `Target` and return a `BoundTarget` which contains\n     * metadata about the types referenced in the template.\n     */\n    bind(target) {\n        if (!target.template) {\n            // TODO(alxhub): handle targets which contain things like HostBindings, etc.\n            throw new Error('Binding without a template not yet supported');\n        }\n        // First, parse the template into a `Scope` structure. This operation captures the syntactic\n        // scopes in the template and makes them available for later use.\n        const scope = Scope.apply(target.template);\n        // Next, perform directive matching on the template using the `DirectiveBinder`. This returns:\n        //   - directives: Map of nodes (elements & ng-templates) to the directives on them.\n        //   - bindings: Map of inputs, outputs, and attributes to the directive/element that claims\n        //     them. TODO(alxhub): handle multiple directives claiming an input/output/etc.\n        //   - references: Map of #references to their targets.\n        const { directives, bindings, references } = DirectiveBinder.apply(target.template, this.directiveMatcher);\n        // Finally, run the TemplateBinder to bind references, variables, and other entities within the\n        // template. This extracts all the metadata that doesn't depend on directive matching.\n        const { expressions, symbols, nestingLevel, usedPipes } = TemplateBinder.apply(target.template, scope);\n        return new R3BoundTarget(target, directives, bindings, references, expressions, symbols, nestingLevel, usedPipes);\n    }\n}\n/**\n * Represents a binding scope within a template.\n *\n * Any variables, references, or other named entities declared within the template will\n * be captured and available by name in `namedEntities`. Additionally, child templates will\n * be analyzed and have their child `Scope`s available in `childScopes`.\n */\nclass Scope {\n    constructor(parentScope) {\n        this.parentScope = parentScope;\n        /**\n         * Named members of the `Scope`, such as `Reference`s or `Variable`s.\n         */\n        this.namedEntities = new Map();\n        /**\n         * Child `Scope`s for immediately nested `Template`s.\n         */\n        this.childScopes = new Map();\n    }\n    /**\n     * Process a template (either as a `Template` sub-template with variables, or a plain array of\n     * template `Node`s) and construct its `Scope`.\n     */\n    static apply(template) {\n        const scope = new Scope();\n        scope.ingest(template);\n        return scope;\n    }\n    /**\n     * Internal method to process the template and populate the `Scope`.\n     */\n    ingest(template) {\n        if (template instanceof Template) {\n            // Variables on an <ng-template> are defined in the inner scope.\n            template.variables.forEach(node => this.visitVariable(node));\n            // Process the nodes of the template.\n            template.children.forEach(node => node.visit(this));\n        }\n        else {\n            // No overarching `Template` instance, so process the nodes directly.\n            template.forEach(node => node.visit(this));\n        }\n    }\n    visitElement(element) {\n        // `Element`s in the template may have `Reference`s which are captured in the scope.\n        element.references.forEach(node => this.visitReference(node));\n        // Recurse into the `Element`'s children.\n        element.children.forEach(node => node.visit(this));\n    }\n    visitTemplate(template) {\n        // References on a <ng-template> are defined in the outer scope, so capture them before\n        // processing the template's child scope.\n        template.references.forEach(node => this.visitReference(node));\n        // Next, create an inner scope and process the template within it.\n        const scope = new Scope(this);\n        scope.ingest(template);\n        this.childScopes.set(template, scope);\n    }\n    visitVariable(variable) {\n        // Declare the variable if it's not already.\n        this.maybeDeclare(variable);\n    }\n    visitReference(reference) {\n        // Declare the variable if it's not already.\n        this.maybeDeclare(reference);\n    }\n    // Unused visitors.\n    visitContent(content) { }\n    visitBoundAttribute(attr) { }\n    visitBoundEvent(event) { }\n    visitBoundText(text) { }\n    visitText(text) { }\n    visitTextAttribute(attr) { }\n    visitIcu(icu) { }\n    maybeDeclare(thing) {\n        // Declare something with a name, as long as that name isn't taken.\n        if (!this.namedEntities.has(thing.name)) {\n            this.namedEntities.set(thing.name, thing);\n        }\n    }\n    /**\n     * Look up a variable within this `Scope`.\n     *\n     * This can recurse into a parent `Scope` if it's available.\n     */\n    lookup(name) {\n        if (this.namedEntities.has(name)) {\n            // Found in the local scope.\n            return this.namedEntities.get(name);\n        }\n        else if (this.parentScope !== undefined) {\n            // Not in the local scope, but there's a parent scope so check there.\n            return this.parentScope.lookup(name);\n        }\n        else {\n            // At the top level and it wasn't found.\n            return null;\n        }\n    }\n    /**\n     * Get the child scope for a `Template`.\n     *\n     * This should always be defined.\n     */\n    getChildScope(template) {\n        const res = this.childScopes.get(template);\n        if (res === undefined) {\n            throw new Error(`Assertion error: child scope for ${template} not found`);\n        }\n        return res;\n    }\n}\n/**\n * Processes a template and matches directives on nodes (elements and templates).\n *\n * Usually used via the static `apply()` method.\n */\nclass DirectiveBinder {\n    constructor(matcher, directives, bindings, references) {\n        this.matcher = matcher;\n        this.directives = directives;\n        this.bindings = bindings;\n        this.references = references;\n    }\n    /**\n     * Process a template (list of `Node`s) and perform directive matching against each node.\n     *\n     * @param template the list of template `Node`s to match (recursively).\n     * @param selectorMatcher a `SelectorMatcher` containing the directives that are in scope for\n     * this template.\n     * @returns three maps which contain information about directives in the template: the\n     * `directives` map which lists directives matched on each node, the `bindings` map which\n     * indicates which directives claimed which bindings (inputs, outputs, etc), and the `references`\n     * map which resolves #references (`Reference`s) within the template to the named directive or\n     * template node.\n     */\n    static apply(template, selectorMatcher) {\n        const directives = new Map();\n        const bindings = new Map();\n        const references = new Map();\n        const matcher = new DirectiveBinder(selectorMatcher, directives, bindings, references);\n        matcher.ingest(template);\n        return { directives, bindings, references };\n    }\n    ingest(template) {\n        template.forEach(node => node.visit(this));\n    }\n    visitElement(element) {\n        this.visitElementOrTemplate(element.name, element);\n    }\n    visitTemplate(template) {\n        this.visitElementOrTemplate('ng-template', template);\n    }\n    visitElementOrTemplate(elementName, node) {\n        // First, determine the HTML shape of the node for the purpose of directive matching.\n        // Do this by building up a `CssSelector` for the node.\n        const cssSelector = createCssSelector(elementName, getAttrsForDirectiveMatching(node));\n        // Next, use the `SelectorMatcher` to get the list of directives on the node.\n        const directives = [];\n        this.matcher.match(cssSelector, (_, directive) => directives.push(directive));\n        if (directives.length > 0) {\n            this.directives.set(node, directives);\n        }\n        // Resolve any references that are created on this node.\n        node.references.forEach(ref => {\n            let dirTarget = null;\n            // If the reference expression is empty, then it matches the \"primary\" directive on the node\n            // (if there is one). Otherwise it matches the host node itself (either an element or\n            // <ng-template> node).\n            if (ref.value.trim() === '') {\n                // This could be a reference to a component if there is one.\n                dirTarget = directives.find(dir => dir.isComponent) || null;\n            }\n            else {\n                // This should be a reference to a directive exported via exportAs.\n                dirTarget =\n                    directives.find(dir => dir.exportAs !== null && dir.exportAs.some(value => value === ref.value)) ||\n                        null;\n                // Check if a matching directive was found.\n                if (dirTarget === null) {\n                    // No matching directive was found - this reference points to an unknown target. Leave it\n                    // unmapped.\n                    return;\n                }\n            }\n            if (dirTarget !== null) {\n                // This reference points to a directive.\n                this.references.set(ref, { directive: dirTarget, node });\n            }\n            else {\n                // This reference points to the node itself.\n                this.references.set(ref, node);\n            }\n        });\n        const setAttributeBinding = (attribute, ioType) => {\n            const dir = directives.find(dir => dir[ioType].hasBindingPropertyName(attribute.name));\n            const binding = dir !== undefined ? dir : node;\n            this.bindings.set(attribute, binding);\n        };\n        // Node inputs (bound attributes) and text attributes can be bound to an\n        // input on a directive.\n        node.inputs.forEach(input => setAttributeBinding(input, 'inputs'));\n        node.attributes.forEach(attr => setAttributeBinding(attr, 'inputs'));\n        if (node instanceof Template) {\n            node.templateAttrs.forEach(attr => setAttributeBinding(attr, 'inputs'));\n        }\n        // Node outputs (bound events) can be bound to an output on a directive.\n        node.outputs.forEach(output => setAttributeBinding(output, 'outputs'));\n        // Recurse into the node's children.\n        node.children.forEach(child => child.visit(this));\n    }\n    // Unused visitors.\n    visitContent(content) { }\n    visitVariable(variable) { }\n    visitReference(reference) { }\n    visitTextAttribute(attribute) { }\n    visitBoundAttribute(attribute) { }\n    visitBoundEvent(attribute) { }\n    visitBoundAttributeOrEvent(node) { }\n    visitText(text) { }\n    visitBoundText(text) { }\n    visitIcu(icu) { }\n}\n/**\n * Processes a template and extract metadata about expressions and symbols within.\n *\n * This is a companion to the `DirectiveBinder` that doesn't require knowledge of directives matched\n * within the template in order to operate.\n *\n * Expressions are visited by the superclass `RecursiveAstVisitor`, with custom logic provided\n * by overridden methods from that visitor.\n */\nclass TemplateBinder extends RecursiveAstVisitor$1 {\n    constructor(bindings, symbols, usedPipes, nestingLevel, scope, template, level) {\n        super();\n        this.bindings = bindings;\n        this.symbols = symbols;\n        this.usedPipes = usedPipes;\n        this.nestingLevel = nestingLevel;\n        this.scope = scope;\n        this.template = template;\n        this.level = level;\n        this.pipesUsed = [];\n        // Save a bit of processing time by constructing this closure in advance.\n        this.visitNode = (node) => node.visit(this);\n    }\n    // This method is defined to reconcile the type of TemplateBinder since both\n    // RecursiveAstVisitor and Visitor define the visit() method in their\n    // interfaces.\n    visit(node, context) {\n        if (node instanceof AST) {\n            node.visit(this, context);\n        }\n        else {\n            node.visit(this);\n        }\n    }\n    /**\n     * Process a template and extract metadata about expressions and symbols within.\n     *\n     * @param template the nodes of the template to process\n     * @param scope the `Scope` of the template being processed.\n     * @returns three maps which contain metadata about the template: `expressions` which interprets\n     * special `AST` nodes in expressions as pointing to references or variables declared within the\n     * template, `symbols` which maps those variables and references to the nested `Template` which\n     * declares them, if any, and `nestingLevel` which associates each `Template` with a integer\n     * nesting level (how many levels deep within the template structure the `Template` is), starting\n     * at 1.\n     */\n    static apply(template, scope) {\n        const expressions = new Map();\n        const symbols = new Map();\n        const nestingLevel = new Map();\n        const usedPipes = new Set();\n        // The top-level template has nesting level 0.\n        const binder = new TemplateBinder(expressions, symbols, usedPipes, nestingLevel, scope, template instanceof Template ? template : null, 0);\n        binder.ingest(template);\n        return { expressions, symbols, nestingLevel, usedPipes };\n    }\n    ingest(template) {\n        if (template instanceof Template) {\n            // For <ng-template>s, process only variables and child nodes. Inputs, outputs, templateAttrs,\n            // and references were all processed in the scope of the containing template.\n            template.variables.forEach(this.visitNode);\n            template.children.forEach(this.visitNode);\n            // Set the nesting level.\n            this.nestingLevel.set(template, this.level);\n        }\n        else {\n            // Visit each node from the top-level template.\n            template.forEach(this.visitNode);\n        }\n    }\n    visitElement(element) {\n        // Visit the inputs, outputs, and children of the element.\n        element.inputs.forEach(this.visitNode);\n        element.outputs.forEach(this.visitNode);\n        element.children.forEach(this.visitNode);\n    }\n    visitTemplate(template) {\n        // First, visit inputs, outputs and template attributes of the template node.\n        template.inputs.forEach(this.visitNode);\n        template.outputs.forEach(this.visitNode);\n        template.templateAttrs.forEach(this.visitNode);\n        // References are also evaluated in the outer context.\n        template.references.forEach(this.visitNode);\n        // Next, recurse into the template using its scope, and bumping the nesting level up by one.\n        const childScope = this.scope.getChildScope(template);\n        const binder = new TemplateBinder(this.bindings, this.symbols, this.usedPipes, this.nestingLevel, childScope, template, this.level + 1);\n        binder.ingest(template);\n    }\n    visitVariable(variable) {\n        // Register the `Variable` as a symbol in the current `Template`.\n        if (this.template !== null) {\n            this.symbols.set(variable, this.template);\n        }\n    }\n    visitReference(reference) {\n        // Register the `Reference` as a symbol in the current `Template`.\n        if (this.template !== null) {\n            this.symbols.set(reference, this.template);\n        }\n    }\n    // Unused template visitors\n    visitText(text) { }\n    visitContent(content) { }\n    visitTextAttribute(attribute) { }\n    visitIcu(icu) {\n        Object.keys(icu.vars).forEach(key => icu.vars[key].visit(this));\n        Object.keys(icu.placeholders).forEach(key => icu.placeholders[key].visit(this));\n    }\n    // The remaining visitors are concerned with processing AST expressions within template bindings\n    visitBoundAttribute(attribute) {\n        attribute.value.visit(this);\n    }\n    visitBoundEvent(event) {\n        event.handler.visit(this);\n    }\n    visitBoundText(text) {\n        text.value.visit(this);\n    }\n    visitPipe(ast, context) {\n        this.usedPipes.add(ast.name);\n        return super.visitPipe(ast, context);\n    }\n    // These five types of AST expressions can refer to expression roots, which could be variables\n    // or references in the current scope.\n    visitPropertyRead(ast, context) {\n        this.maybeMap(context, ast, ast.name);\n        return super.visitPropertyRead(ast, context);\n    }\n    visitSafePropertyRead(ast, context) {\n        this.maybeMap(context, ast, ast.name);\n        return super.visitSafePropertyRead(ast, context);\n    }\n    visitPropertyWrite(ast, context) {\n        this.maybeMap(context, ast, ast.name);\n        return super.visitPropertyWrite(ast, context);\n    }\n    visitMethodCall(ast, context) {\n        this.maybeMap(context, ast, ast.name);\n        return super.visitMethodCall(ast, context);\n    }\n    visitSafeMethodCall(ast, context) {\n        this.maybeMap(context, ast, ast.name);\n        return super.visitSafeMethodCall(ast, context);\n    }\n    maybeMap(scope, ast, name) {\n        // If the receiver of the expression isn't the `ImplicitReceiver`, this isn't the root of an\n        // `AST` expression that maps to a `Variable` or `Reference`.\n        if (!(ast.receiver instanceof ImplicitReceiver)) {\n            return;\n        }\n        // Check whether the name exists in the current scope. If so, map it. Otherwise, the name is\n        // probably a property on the top-level component context.\n        let target = this.scope.lookup(name);\n        if (target !== null) {\n            this.bindings.set(ast, target);\n        }\n    }\n}\n/**\n * Metadata container for a `Target` that allows queries for specific bits of metadata.\n *\n * See `BoundTarget` for documentation on the individual methods.\n */\nclass R3BoundTarget {\n    constructor(target, directives, bindings, references, exprTargets, symbols, nestingLevel, usedPipes) {\n        this.target = target;\n        this.directives = directives;\n        this.bindings = bindings;\n        this.references = references;\n        this.exprTargets = exprTargets;\n        this.symbols = symbols;\n        this.nestingLevel = nestingLevel;\n        this.usedPipes = usedPipes;\n    }\n    getDirectivesOfNode(node) {\n        return this.directives.get(node) || null;\n    }\n    getReferenceTarget(ref) {\n        return this.references.get(ref) || null;\n    }\n    getConsumerOfBinding(binding) {\n        return this.bindings.get(binding) || null;\n    }\n    getExpressionTarget(expr) {\n        return this.exprTargets.get(expr) || null;\n    }\n    getTemplateOfSymbol(symbol) {\n        return this.symbols.get(symbol) || null;\n    }\n    getNestingLevel(template) {\n        return this.nestingLevel.get(template) || 0;\n    }\n    getUsedDirectives() {\n        const set = new Set();\n        this.directives.forEach(dirs => dirs.forEach(dir => set.add(dir)));\n        return Array.from(set.values());\n    }\n    getUsedPipes() {\n        return Array.from(this.usedPipes);\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// This file only reexports content of the `src` folder. Keep it that way.\n// This function call has a global side effects and publishes the compiler into global namespace for\n// the late binding of the Compiler to the @angular/core for jit compilation.\npublishFacade(_global);\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// This file only reexports content of the `src` folder. Keep it that way.\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport { AST, ASTWithName, ASTWithSource, AbsoluteSourceSpan, AotCompiler, AotSummaryResolver, ArrayType, AssertNotNull, AstMemoryEfficientTransformer, AstPath, AstTransformer$1 as AstTransformer, AttrAst, Attribute, Binary, BinaryOperator, BinaryOperatorExpr, BindingPipe, BoundDirectivePropertyAst, BoundElementProperty, BoundElementPropertyAst, BoundEventAst, BoundTextAst, BuiltinMethod, BuiltinType, BuiltinTypeName, BuiltinVar, CONTENT_ATTR, CUSTOM_ELEMENTS_SCHEMA, CastExpr, Chain, ClassField, ClassMethod, ClassStmt, CommaExpr, Comment, CompileDirectiveMetadata, CompileMetadataResolver, CompileNgModuleMetadata, CompilePipeMetadata, CompileReflector, CompileShallowModuleMetadata, CompileStylesheetMetadata, CompileSummaryKind, CompileTemplateMetadata, CompiledStylesheet, CompilerConfig, Conditional, ConditionalExpr, ConstantPool, CssSelector, DEFAULT_INTERPOLATION_CONFIG, DYNAMIC_TYPE, DeclareFunctionStmt, DeclareVarStmt, DirectiveAst, DirectiveNormalizer, DirectiveResolver, DomElementSchemaRegistry, EOF, ERROR_COMPONENT_TYPE, Element$1 as Element, ElementAst, ElementSchemaRegistry, EmbeddedTemplateAst, EmitterVisitorContext, EmptyExpr, Expansion, ExpansionCase, Expression, ExpressionBinding, ExpressionStatement, ExpressionType, ExternalExpr, ExternalReference, Extractor, FunctionCall, FunctionExpr, GeneratedFile, HOST_ATTR, HtmlParser, HtmlTagDefinition, I18NHtmlParser, Identifiers, IfStmt, ImplicitReceiver, InstantiateExpr, Interpolation, InterpolationConfig, InvokeFunctionExpr, InvokeMethodExpr, IvyParser, JSDocComment, JitCompiler, JitEvaluator, JitSummaryResolver, KeyedRead, KeyedWrite, LeadingComment, Lexer, LiteralArray, LiteralArrayExpr, LiteralExpr, LiteralMap, LiteralMapExpr, LiteralPrimitive, LocalizedString, MapType, MessageBundle, MethodCall, NAMED_ENTITIES, NGSP_UNICODE, NONE_TYPE, NO_ERRORS_SCHEMA, NgContentAst, NgModuleCompiler, NgModuleResolver, NodeWithI18n, NonNullAssert, NotExpr, NullTemplateVisitor, ParseError, ParseErrorLevel, ParseLocation, ParseSourceFile, ParseSourceSpan, ParseSpan, ParseTreeResult, ParsedEvent, ParsedProperty, ParsedPropertyType, ParsedVariable, Parser$1 as Parser, ParserError, PipeResolver, PrefixNot, PropertyRead, PropertyWrite, ProviderAst, ProviderAstType, ProviderMeta, Quote, R3BoundTarget, R3FactoryTarget, Identifiers$1 as R3Identifiers, R3ResolvedDependencyType, R3TargetBinder, ReadKeyExpr, ReadPropExpr, ReadVarExpr, RecursiveAstVisitor$1 as RecursiveAstVisitor, RecursiveTemplateAstVisitor, RecursiveVisitor$1 as RecursiveVisitor, ReferenceAst, ResolvedStaticSymbol, ResourceLoader, ReturnStatement, STRING_TYPE, SafeMethodCall, SafePropertyRead, SelectorContext, SelectorListContext, SelectorMatcher, Serializer, SplitInterpolation, Statement, StaticReflector, StaticSymbol, StaticSymbolCache, StaticSymbolResolver, StmtModifier, StyleCompiler, StylesCompileDependency, SummaryResolver, TagContentType, TemplateBindingParseResult, TemplateParseError, TemplateParseResult, TemplateParser, Text$3 as Text, TextAst, ThrowStmt, BoundAttribute as TmplAstBoundAttribute, BoundEvent as TmplAstBoundEvent, BoundText as TmplAstBoundText, Content as TmplAstContent, Element as TmplAstElement, RecursiveVisitor as TmplAstRecursiveVisitor, Reference as TmplAstReference, Template as TmplAstTemplate, Text as TmplAstText, TextAttribute as TmplAstTextAttribute, Variable as TmplAstVariable, Token$1 as Token, TokenType$1 as TokenType, TransitiveCompileNgModuleMetadata, TreeError, TryCatchStmt, Type$1 as Type, TypeScriptEmitter, TypeofExpr, Unary, UnaryOperator, UnaryOperatorExpr, UrlResolver, VERSION$1 as VERSION, VariableAst, VariableBinding, Version, ViewCompiler, WrappedNodeExpr, WriteKeyExpr, WritePropExpr, WriteVarExpr, Xliff, Xliff2, Xmb, XmlParser, Xtb, _ParseAST, analyzeAndValidateNgModules, analyzeFile, analyzeFileForInjectables, analyzeNgModules, collectExternalReferences, compileComponentFromMetadata, compileDirectiveFromMetadata, compileFactoryFunction, compileInjectable, compileInjector, compileNgModule, compilePipeFromMetadata, componentFactoryName, computeMsgId, core, createAotCompiler, createAotUrlResolver, createElementCssSelector, createLoweredSymbol, createOfflineCompileUrlResolver, createUrlResolverWithoutPackagePrefix, debugOutputAstAsTypeScript, findNode, flatten, formattedError, getHtmlTagDefinition, getNsPrefix, getParseErrors, getUrlScheme, hostViewClassName, identifierModuleUrl, identifierName, isEmptyExpression, isFormattedError, isIdentifier, isLoweredSymbol, isNgContainer, isNgContent, isNgTemplate, isQuote, isSyntaxError, jsDocComment, leadingComment, literalMap, makeBindingParser, mergeAnalyzedFiles, mergeNsAndName, ngModuleJitUrl, parseHostBindings, parseTemplate, preserveWhitespacesDefault, publishFacade, r3JitTypeSourceSpan, removeSummaryDuplicates, rendererTypeName, sanitizeIdentifier, sharedStylesheetJitUrl, splitClasses, splitNsName, syntaxError, templateJitUrl, templateSourceUrl, templateVisitAll, toTypeScript, tokenName, tokenReference, typeSourceSpan, unescapeIdentifier, unwrapResolvedMetadata, verifyHostBindings, viewClassName, visitAll$1 as visitAll };\n//# sourceMappingURL=compiler.js.map\n","import { fromArray } from './fromArray';\nimport { isArray } from '../util/isArray';\nimport { Subscriber } from '../Subscriber';\nimport { iterator as Symbol_iterator } from '../../internal/symbol/iterator';\nimport { SimpleOuterSubscriber, SimpleInnerSubscriber, innerSubscribe } from '../innerSubscribe';\nexport function zip(...observables) {\n    const resultSelector = observables[observables.length - 1];\n    if (typeof resultSelector === 'function') {\n        observables.pop();\n    }\n    return fromArray(observables, undefined).lift(new ZipOperator(resultSelector));\n}\nexport class ZipOperator {\n    constructor(resultSelector) {\n        this.resultSelector = resultSelector;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new ZipSubscriber(subscriber, this.resultSelector));\n    }\n}\nexport class ZipSubscriber extends Subscriber {\n    constructor(destination, resultSelector, values = Object.create(null)) {\n        super(destination);\n        this.resultSelector = resultSelector;\n        this.iterators = [];\n        this.active = 0;\n        this.resultSelector = (typeof resultSelector === 'function') ? resultSelector : undefined;\n    }\n    _next(value) {\n        const iterators = this.iterators;\n        if (isArray(value)) {\n            iterators.push(new StaticArrayIterator(value));\n        }\n        else if (typeof value[Symbol_iterator] === 'function') {\n            iterators.push(new StaticIterator(value[Symbol_iterator]()));\n        }\n        else {\n            iterators.push(new ZipBufferIterator(this.destination, this, value));\n        }\n    }\n    _complete() {\n        const iterators = this.iterators;\n        const len = iterators.length;\n        this.unsubscribe();\n        if (len === 0) {\n            this.destination.complete();\n            return;\n        }\n        this.active = len;\n        for (let i = 0; i < len; i++) {\n            let iterator = iterators[i];\n            if (iterator.stillUnsubscribed) {\n                const destination = this.destination;\n                destination.add(iterator.subscribe());\n            }\n            else {\n                this.active--;\n            }\n        }\n    }\n    notifyInactive() {\n        this.active--;\n        if (this.active === 0) {\n            this.destination.complete();\n        }\n    }\n    checkIterators() {\n        const iterators = this.iterators;\n        const len = iterators.length;\n        const destination = this.destination;\n        for (let i = 0; i < len; i++) {\n            let iterator = iterators[i];\n            if (typeof iterator.hasValue === 'function' && !iterator.hasValue()) {\n                return;\n            }\n        }\n        let shouldComplete = false;\n        const args = [];\n        for (let i = 0; i < len; i++) {\n            let iterator = iterators[i];\n            let result = iterator.next();\n            if (iterator.hasCompleted()) {\n                shouldComplete = true;\n            }\n            if (result.done) {\n                destination.complete();\n                return;\n            }\n            args.push(result.value);\n        }\n        if (this.resultSelector) {\n            this._tryresultSelector(args);\n        }\n        else {\n            destination.next(args);\n        }\n        if (shouldComplete) {\n            destination.complete();\n        }\n    }\n    _tryresultSelector(args) {\n        let result;\n        try {\n            result = this.resultSelector.apply(this, args);\n        }\n        catch (err) {\n            this.destination.error(err);\n            return;\n        }\n        this.destination.next(result);\n    }\n}\nclass StaticIterator {\n    constructor(iterator) {\n        this.iterator = iterator;\n        this.nextResult = iterator.next();\n    }\n    hasValue() {\n        return true;\n    }\n    next() {\n        const result = this.nextResult;\n        this.nextResult = this.iterator.next();\n        return result;\n    }\n    hasCompleted() {\n        const nextResult = this.nextResult;\n        return Boolean(nextResult && nextResult.done);\n    }\n}\nclass StaticArrayIterator {\n    constructor(array) {\n        this.array = array;\n        this.index = 0;\n        this.length = 0;\n        this.length = array.length;\n    }\n    [Symbol_iterator]() {\n        return this;\n    }\n    next(value) {\n        const i = this.index++;\n        const array = this.array;\n        return i < this.length ? { value: array[i], done: false } : { value: null, done: true };\n    }\n    hasValue() {\n        return this.array.length > this.index;\n    }\n    hasCompleted() {\n        return this.array.length === this.index;\n    }\n}\nclass ZipBufferIterator extends SimpleOuterSubscriber {\n    constructor(destination, parent, observable) {\n        super(destination);\n        this.parent = parent;\n        this.observable = observable;\n        this.stillUnsubscribed = true;\n        this.buffer = [];\n        this.isComplete = false;\n    }\n    [Symbol_iterator]() {\n        return this;\n    }\n    next() {\n        const buffer = this.buffer;\n        if (buffer.length === 0 && this.isComplete) {\n            return { value: null, done: true };\n        }\n        else {\n            return { value: buffer.shift(), done: false };\n        }\n    }\n    hasValue() {\n        return this.buffer.length > 0;\n    }\n    hasCompleted() {\n        return this.buffer.length === 0 && this.isComplete;\n    }\n    notifyComplete() {\n        if (this.buffer.length > 0) {\n            this.isComplete = true;\n            this.parent.notifyInactive();\n        }\n        else {\n            this.destination.complete();\n        }\n    }\n    notifyNext(innerValue) {\n        this.buffer.push(innerValue);\n        this.parent.checkIterators();\n    }\n    subscribe() {\n        return innerSubscribe(this.observable, new SimpleInnerSubscriber(this));\n    }\n}\n//# sourceMappingURL=zip.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar shareReplay_1 = require(\"../../operator/shareReplay\");\nrxjs_1.Observable.prototype.shareReplay = shareReplay_1.shareReplay;\n//# sourceMappingURL=shareReplay.js.map","export default function _iterableToArray(iter) {\n  if (typeof Symbol !== \"undefined\" && Symbol.iterator in Object(iter)) return Array.from(iter);\n}","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar windowTime_1 = require(\"../../operator/windowTime\");\nrxjs_1.Observable.prototype.windowTime = windowTime_1.windowTime;\n//# sourceMappingURL=windowTime.js.map","export const rxSubscriber = (() => typeof Symbol === 'function'\n    ? Symbol('rxSubscriber')\n    : '@@rxSubscriber_' + Math.random())();\nexport const $$rxSubscriber = rxSubscriber;\n//# sourceMappingURL=rxSubscriber.js.map","import { not } from '../util/not';\nimport { subscribeTo } from '../util/subscribeTo';\nimport { filter } from '../operators/filter';\nimport { Observable } from '../Observable';\nexport function partition(source, predicate, thisArg) {\n    return [\n        filter(predicate, thisArg)(new Observable(subscribeTo(source))),\n        filter(not(predicate, thisArg))(new Observable(subscribeTo(source)))\n    ];\n}\n//# sourceMappingURL=partition.js.map","import { Subject } from './Subject';\nimport { ObjectUnsubscribedError } from './util/ObjectUnsubscribedError';\nexport class BehaviorSubject extends Subject {\n    constructor(_value) {\n        super();\n        this._value = _value;\n    }\n    get value() {\n        return this.getValue();\n    }\n    _subscribe(subscriber) {\n        const subscription = super._subscribe(subscriber);\n        if (subscription && !subscription.closed) {\n            subscriber.next(this._value);\n        }\n        return subscription;\n    }\n    getValue() {\n        if (this.hasError) {\n            throw this.thrownError;\n        }\n        else if (this.closed) {\n            throw new ObjectUnsubscribedError();\n        }\n        else {\n            return this._value;\n        }\n    }\n    next(value) {\n        super.next(this._value = value);\n    }\n}\n//# sourceMappingURL=BehaviorSubject.js.map","export default function _isNativeReflectConstruct() {\n  if (typeof Reflect === \"undefined\" || !Reflect.construct) return false;\n  if (Reflect.construct.sham) return false;\n  if (typeof Proxy === \"function\") return true;\n\n  try {\n    Date.prototype.toString.call(Reflect.construct(Date, [], function () {}));\n    return true;\n  } catch (e) {\n    return false;\n  }\n}","let _enable_super_gross_mode_that_will_cause_bad_things = false;\nexport const config = {\n    Promise: undefined,\n    set useDeprecatedSynchronousErrorHandling(value) {\n        if (value) {\n            const error = new Error();\n            console.warn('DEPRECATED! RxJS was set to use deprecated synchronous error handling behavior by code at: \\n' + error.stack);\n        }\n        else if (_enable_super_gross_mode_that_will_cause_bad_things) {\n            console.log('RxJS: Back to a better error behavior. Thank you. <3');\n        }\n        _enable_super_gross_mode_that_will_cause_bad_things = value;\n    },\n    get useDeprecatedSynchronousErrorHandling() {\n        return _enable_super_gross_mode_that_will_cause_bad_things;\n    },\n};\n//# sourceMappingURL=config.js.map","import { Subscriber } from '../Subscriber';\nexport function skipWhile(predicate) {\n    return (source) => source.lift(new SkipWhileOperator(predicate));\n}\nclass SkipWhileOperator {\n    constructor(predicate) {\n        this.predicate = predicate;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new SkipWhileSubscriber(subscriber, this.predicate));\n    }\n}\nclass SkipWhileSubscriber extends Subscriber {\n    constructor(destination, predicate) {\n        super(destination);\n        this.predicate = predicate;\n        this.skipping = true;\n        this.index = 0;\n    }\n    _next(value) {\n        const destination = this.destination;\n        if (this.skipping) {\n            this.tryCallPredicate(value);\n        }\n        if (!this.skipping) {\n            destination.next(value);\n        }\n    }\n    tryCallPredicate(value) {\n        try {\n            const result = this.predicate(value, this.index++);\n            this.skipping = Boolean(result);\n        }\n        catch (err) {\n            this.destination.error(err);\n        }\n    }\n}\n//# sourceMappingURL=skipWhile.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Projects each source value to an Observable which is merged in the output\n * Observable, in a serialized fashion waiting for each one to complete before\n * merging the next.\n *\n * <span class=\"informal\">Maps each value to an Observable, then flattens all of\n * these inner Observables using {@link concatAll}.</span>\n *\n * <img src=\"./img/concatMap.png\" width=\"100%\">\n *\n * Returns an Observable that emits items based on applying a function that you\n * supply to each item emitted by the source Observable, where that function\n * returns an (so-called \"inner\") Observable. Each new inner Observable is\n * concatenated with the previous inner Observable.\n *\n * __Warning:__ if source values arrive endlessly and faster than their\n * corresponding inner Observables can complete, it will result in memory issues\n * as inner Observables amass in an unbounded buffer waiting for their turn to\n * be subscribed to.\n *\n * Note: `concatMap` is equivalent to `mergeMap` with concurrency parameter set\n * to `1`.\n *\n * @example <caption>For each click event, tick every second from 0 to 3, with no concurrency</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.concatMap(ev => Rx.Observable.interval(1000).take(4));\n * result.subscribe(x => console.log(x));\n *\n * // Results in the following:\n * // (results are not concurrent)\n * // For every click on the \"document\" it will emit values 0 to 3 spaced\n * // on a 1000ms interval\n * // one click = 1000ms-> 0 -1000ms-> 1 -1000ms-> 2 -1000ms-> 3\n *\n * @see {@link concat}\n * @see {@link concatAll}\n * @see {@link concatMapTo}\n * @see {@link exhaustMap}\n * @see {@link mergeMap}\n * @see {@link switchMap}\n *\n * @param {function(value: T, ?index: number): ObservableInput} project A function\n * that, when applied to an item emitted by the source Observable, returns an\n * Observable.\n * @return {Observable} An Observable that emits the result of applying the\n * projection function (and the optional `resultSelector`) to each item emitted\n * by the source Observable and taking values from each projected inner\n * Observable sequentially.\n * @method concatMap\n * @owner Observable\n */\nfunction concatMap(project) {\n    return operators_1.concatMap(project)(this);\n}\nexports.concatMap = concatMap;\n//# sourceMappingURL=concatMap.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar concatMap_1 = require(\"../../operator/concatMap\");\nrxjs_1.Observable.prototype.concatMap = concatMap_1.concatMap;\n//# sourceMappingURL=concatMap.js.map","import { async } from '../scheduler/async';\nimport { isDate } from '../util/isDate';\nimport { Subscriber } from '../Subscriber';\nimport { Notification } from '../Notification';\nexport function delay(delay, scheduler = async) {\n    const absoluteDelay = isDate(delay);\n    const delayFor = absoluteDelay ? (+delay - scheduler.now()) : Math.abs(delay);\n    return (source) => source.lift(new DelayOperator(delayFor, scheduler));\n}\nclass DelayOperator {\n    constructor(delay, scheduler) {\n        this.delay = delay;\n        this.scheduler = scheduler;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new DelaySubscriber(subscriber, this.delay, this.scheduler));\n    }\n}\nclass DelaySubscriber extends Subscriber {\n    constructor(destination, delay, scheduler) {\n        super(destination);\n        this.delay = delay;\n        this.scheduler = scheduler;\n        this.queue = [];\n        this.active = false;\n        this.errored = false;\n    }\n    static dispatch(state) {\n        const source = state.source;\n        const queue = source.queue;\n        const scheduler = state.scheduler;\n        const destination = state.destination;\n        while (queue.length > 0 && (queue[0].time - scheduler.now()) <= 0) {\n            queue.shift().notification.observe(destination);\n        }\n        if (queue.length > 0) {\n            const delay = Math.max(0, queue[0].time - scheduler.now());\n            this.schedule(state, delay);\n        }\n        else {\n            this.unsubscribe();\n            source.active = false;\n        }\n    }\n    _schedule(scheduler) {\n        this.active = true;\n        const destination = this.destination;\n        destination.add(scheduler.schedule(DelaySubscriber.dispatch, this.delay, {\n            source: this, destination: this.destination, scheduler: scheduler\n        }));\n    }\n    scheduleNotification(notification) {\n        if (this.errored === true) {\n            return;\n        }\n        const scheduler = this.scheduler;\n        const message = new DelayMessage(scheduler.now() + this.delay, notification);\n        this.queue.push(message);\n        if (this.active === false) {\n            this._schedule(scheduler);\n        }\n    }\n    _next(value) {\n        this.scheduleNotification(Notification.createNext(value));\n    }\n    _error(err) {\n        this.errored = true;\n        this.queue = [];\n        this.destination.error(err);\n        this.unsubscribe();\n    }\n    _complete() {\n        this.scheduleNotification(Notification.createComplete());\n        this.unsubscribe();\n    }\n}\nclass DelayMessage {\n    constructor(time, notification) {\n        this.time = time;\n        this.notification = notification;\n    }\n}\n//# sourceMappingURL=delay.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar buffer_1 = require(\"../../operator/buffer\");\nrxjs_1.Observable.prototype.buffer = buffer_1.buffer;\n//# sourceMappingURL=buffer.js.map","import { Action } from './Action';\nexport class AsyncAction extends Action {\n    constructor(scheduler, work) {\n        super(scheduler, work);\n        this.scheduler = scheduler;\n        this.work = work;\n        this.pending = false;\n    }\n    schedule(state, delay = 0) {\n        if (this.closed) {\n            return this;\n        }\n        this.state = state;\n        const id = this.id;\n        const scheduler = this.scheduler;\n        if (id != null) {\n            this.id = this.recycleAsyncId(scheduler, id, delay);\n        }\n        this.pending = true;\n        this.delay = delay;\n        this.id = this.id || this.requestAsyncId(scheduler, this.id, delay);\n        return this;\n    }\n    requestAsyncId(scheduler, id, delay = 0) {\n        return setInterval(scheduler.flush.bind(scheduler, this), delay);\n    }\n    recycleAsyncId(scheduler, id, delay = 0) {\n        if (delay !== null && this.delay === delay && this.pending === false) {\n            return id;\n        }\n        clearInterval(id);\n        return undefined;\n    }\n    execute(state, delay) {\n        if (this.closed) {\n            return new Error('executing a cancelled action');\n        }\n        this.pending = false;\n        const error = this._execute(state, delay);\n        if (error) {\n            return error;\n        }\n        else if (this.pending === false && this.id != null) {\n            this.id = this.recycleAsyncId(this.scheduler, this.id, null);\n        }\n    }\n    _execute(state, delay) {\n        let errored = false;\n        let errorValue = undefined;\n        try {\n            this.work(state);\n        }\n        catch (e) {\n            errored = true;\n            errorValue = !!e && e || new Error(e);\n        }\n        if (errored) {\n            this.unsubscribe();\n            return errorValue;\n        }\n    }\n    _unsubscribe() {\n        const id = this.id;\n        const scheduler = this.scheduler;\n        const actions = scheduler.actions;\n        const index = actions.indexOf(this);\n        this.work = null;\n        this.state = null;\n        this.pending = false;\n        this.scheduler = null;\n        if (index !== -1) {\n            actions.splice(index, 1);\n        }\n        if (id != null) {\n            this.id = this.recycleAsyncId(scheduler, id, null);\n        }\n        this.delay = null;\n    }\n}\n//# sourceMappingURL=AsyncAction.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {InjectionToken} from '@angular/core';\n\n/**\n * @description\n * Defines an interface that acts as a bridge between the Angular forms API and a\n * native element in the DOM.\n *\n * Implement this interface to create a custom form control directive\n * that integrates with Angular forms.\n *\n * @see DefaultValueAccessor\n *\n * @publicApi\n */\nexport interface ControlValueAccessor {\n  /**\n   * @description\n   * Writes a new value to the element.\n   *\n   * This method is called by the forms API to write to the view when programmatic\n   * changes from model to view are requested.\n   *\n   * @usageNotes\n   * ### Write a value to the element\n   *\n   * The following example writes a value to the native DOM element.\n   *\n   * ```ts\n   * writeValue(value: any): void {\n   *   this._renderer.setProperty(this._elementRef.nativeElement, 'value', value);\n   * }\n   * ```\n   *\n   * @param obj The new value for the element\n   */\n  writeValue(obj: any): void;\n\n  /**\n   * @description\n   * Registers a callback function that is called when the control's value\n   * changes in the UI.\n   *\n   * This method is called by the forms API on initialization to update the form\n   * model when values propagate from the view to the model.\n   *\n   * When implementing the `registerOnChange` method in your own value accessor,\n   * save the given function so your class calls it at the appropriate time.\n   *\n   * @usageNotes\n   * ### Store the change function\n   *\n   * The following example stores the provided function as an internal method.\n   *\n   * ```ts\n   * registerOnChange(fn: (_: any) => void): void {\n   *   this._onChange = fn;\n   * }\n   * ```\n   *\n   * When the value changes in the UI, call the registered\n   * function to allow the forms API to update itself:\n   *\n   * ```ts\n   * host: {\n   *    '(change)': '_onChange($event.target.value)'\n   * }\n   * ```\n   *\n   * @param fn The callback function to register\n   */\n  registerOnChange(fn: any): void;\n\n  /**\n   * @description\n   * Registers a callback function that is called by the forms API on initialization\n   * to update the form model on blur.\n   *\n   * When implementing `registerOnTouched` in your own value accessor, save the given\n   * function so your class calls it when the control should be considered\n   * blurred or \"touched\".\n   *\n   * @usageNotes\n   * ### Store the callback function\n   *\n   * The following example stores the provided function as an internal method.\n   *\n   * ```ts\n   * registerOnTouched(fn: any): void {\n   *   this._onTouched = fn;\n   * }\n   * ```\n   *\n   * On blur (or equivalent), your class should call the registered function to allow\n   * the forms API to update itself:\n   *\n   * ```ts\n   * host: {\n   *    '(blur)': '_onTouched()'\n   * }\n   * ```\n   *\n   * @param fn The callback function to register\n   */\n  registerOnTouched(fn: any): void;\n\n  /**\n   * @description\n   * Function that is called by the forms API when the control status changes to\n   * or from 'DISABLED'. Depending on the status, it enables or disables the\n   * appropriate DOM element.\n   *\n   * @usageNotes\n   * The following is an example of writing the disabled property to a native DOM element:\n   *\n   * ```ts\n   * setDisabledState(isDisabled: boolean): void {\n   *   this._renderer.setProperty(this._elementRef.nativeElement, 'disabled', isDisabled);\n   * }\n   * ```\n   *\n   * @param isDisabled The disabled status to set on the element\n   */\n  setDisabledState?(isDisabled: boolean): void;\n}\n\n/**\n * Used to provide a `ControlValueAccessor` for form controls.\n *\n * See `DefaultValueAccessor` for how to implement one.\n *\n * @publicApi\n */\nexport const NG_VALUE_ACCESSOR = new InjectionToken<ControlValueAccessor>('NgValueAccessor');\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, ElementRef, forwardRef, Renderer2} from '@angular/core';\n\nimport {ControlValueAccessor, NG_VALUE_ACCESSOR} from './control_value_accessor';\n\nexport const CHECKBOX_VALUE_ACCESSOR: any = {\n  provide: NG_VALUE_ACCESSOR,\n  useExisting: forwardRef(() => CheckboxControlValueAccessor),\n  multi: true,\n};\n\n/**\n * @description\n * A `ControlValueAccessor` for writing a value and listening to changes on a checkbox input\n * element.\n *\n * @usageNotes\n *\n * ### Using a checkbox with a reactive form.\n *\n * The following example shows how to use a checkbox with a reactive form.\n *\n * ```ts\n * const rememberLoginControl = new FormControl();\n * ```\n *\n * ```\n * <input type=\"checkbox\" [formControl]=\"rememberLoginControl\">\n * ```\n *\n * @ngModule ReactiveFormsModule\n * @ngModule FormsModule\n * @publicApi\n */\n@Directive({\n  selector:\n      'input[type=checkbox][formControlName],input[type=checkbox][formControl],input[type=checkbox][ngModel]',\n  host: {'(change)': 'onChange($event.target.checked)', '(blur)': 'onTouched()'},\n  providers: [CHECKBOX_VALUE_ACCESSOR]\n})\nexport class CheckboxControlValueAccessor implements ControlValueAccessor {\n  /**\n   * The registered callback function called when a change event occurs on the input element.\n   * @nodoc\n   */\n  onChange = (_: any) => {};\n\n  /**\n   * The registered callback function called when a blur event occurs on the input element.\n   * @nodoc\n   */\n  onTouched = () => {};\n\n  constructor(private _renderer: Renderer2, private _elementRef: ElementRef) {}\n\n  /**\n   * Sets the \"checked\" property on the input element.\n   * @nodoc\n   */\n  writeValue(value: any): void {\n    this._renderer.setProperty(this._elementRef.nativeElement, 'checked', value);\n  }\n\n  /**\n   * Registers a function called when the control value changes.\n   * @nodoc\n   */\n  registerOnChange(fn: (_: any) => {}): void {\n    this.onChange = fn;\n  }\n\n  /**\n   * Registers a function called when the control is touched.\n   * @nodoc\n   */\n  registerOnTouched(fn: () => {}): void {\n    this.onTouched = fn;\n  }\n\n  /**\n   * Sets the \"disabled\" property on the input element.\n   * @nodoc\n   */\n  setDisabledState(isDisabled: boolean): void {\n    this._renderer.setProperty(this._elementRef.nativeElement, 'disabled', isDisabled);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ɵgetDOM as getDOM} from '@angular/common';\nimport {Directive, ElementRef, forwardRef, Inject, InjectionToken, Optional, Renderer2} from '@angular/core';\n\nimport {ControlValueAccessor, NG_VALUE_ACCESSOR} from './control_value_accessor';\n\nexport const DEFAULT_VALUE_ACCESSOR: any = {\n  provide: NG_VALUE_ACCESSOR,\n  useExisting: forwardRef(() => DefaultValueAccessor),\n  multi: true\n};\n\n/**\n * We must check whether the agent is Android because composition events\n * behave differently between iOS and Android.\n */\nfunction _isAndroid(): boolean {\n  const userAgent = getDOM() ? getDOM().getUserAgent() : '';\n  return /android (\\d+)/.test(userAgent.toLowerCase());\n}\n\n/**\n * @description\n * Provide this token to control if form directives buffer IME input until\n * the \"compositionend\" event occurs.\n * @publicApi\n */\nexport const COMPOSITION_BUFFER_MODE = new InjectionToken<boolean>('CompositionEventMode');\n\n/**\n * @description\n * The default `ControlValueAccessor` for writing a value and listening to changes on input\n * elements. The accessor is used by the `FormControlDirective`, `FormControlName`, and\n * `NgModel` directives.\n *\n * @usageNotes\n *\n * ### Using the default value accessor\n *\n * The following example shows how to use an input element that activates the default value accessor\n * (in this case, a text field).\n *\n * ```ts\n * const firstNameControl = new FormControl();\n * ```\n *\n * ```\n * <input type=\"text\" [formControl]=\"firstNameControl\">\n * ```\n *\n * @ngModule ReactiveFormsModule\n * @ngModule FormsModule\n * @publicApi\n */\n@Directive({\n  selector:\n      'input:not([type=checkbox])[formControlName],textarea[formControlName],input:not([type=checkbox])[formControl],textarea[formControl],input:not([type=checkbox])[ngModel],textarea[ngModel],[ngDefaultControl]',\n  // TODO: vsavkin replace the above selector with the one below it once\n  // https://github.com/angular/angular/issues/3011 is implemented\n  // selector: '[ngModel],[formControl],[formControlName]',\n  host: {\n    '(input)': '$any(this)._handleInput($event.target.value)',\n    '(blur)': 'onTouched()',\n    '(compositionstart)': '$any(this)._compositionStart()',\n    '(compositionend)': '$any(this)._compositionEnd($event.target.value)'\n  },\n  providers: [DEFAULT_VALUE_ACCESSOR]\n})\nexport class DefaultValueAccessor implements ControlValueAccessor {\n  /**\n   * The registered callback function called when an input event occurs on the input element.\n   * @nodoc\n   */\n  onChange = (_: any) => {};\n\n  /**\n   * The registered callback function called when a blur event occurs on the input element.\n   * @nodoc\n   */\n  onTouched = () => {};\n\n  /** Whether the user is creating a composition string (IME events). */\n  private _composing = false;\n\n  constructor(\n      private _renderer: Renderer2, private _elementRef: ElementRef,\n      @Optional() @Inject(COMPOSITION_BUFFER_MODE) private _compositionMode: boolean) {\n    if (this._compositionMode == null) {\n      this._compositionMode = !_isAndroid();\n    }\n  }\n\n  /**\n   * Sets the \"value\" property on the input element.\n   * @nodoc\n   */\n  writeValue(value: any): void {\n    const normalizedValue = value == null ? '' : value;\n    this._renderer.setProperty(this._elementRef.nativeElement, 'value', normalizedValue);\n  }\n\n  /**\n   * Registers a function called when the control value changes.\n   * @nodoc\n   */\n  registerOnChange(fn: (_: any) => void): void {\n    this.onChange = fn;\n  }\n\n  /**\n   * Registers a function called when the control is touched.\n   * @nodoc\n   */\n  registerOnTouched(fn: () => void): void {\n    this.onTouched = fn;\n  }\n\n  /**\n   * Sets the \"disabled\" property on the input element.\n   * @nodoc\n   */\n  setDisabledState(isDisabled: boolean): void {\n    this._renderer.setProperty(this._elementRef.nativeElement, 'disabled', isDisabled);\n  }\n\n  /** @internal */\n  _handleInput(value: any): void {\n    if (!this._compositionMode || (this._compositionMode && !this._composing)) {\n      this.onChange(value);\n    }\n  }\n\n  /** @internal */\n  _compositionStart(): void {\n    this._composing = true;\n  }\n\n  /** @internal */\n  _compositionEnd(value: any): void {\n    this._composing = false;\n    this._compositionMode && this.onChange(value);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Observable} from 'rxjs';\nimport {AbstractControl} from '../model';\nimport {ValidationErrors} from './validators';\n\n/**\n * @description\n * Base class for control directives.\n *\n * This class is only used internally in the `ReactiveFormsModule` and the `FormsModule`.\n *\n * @publicApi\n */\nexport abstract class AbstractControlDirective {\n  /**\n   * @description\n   * A reference to the underlying control.\n   *\n   * @returns the control that backs this directive. Most properties fall through to that instance.\n   */\n  abstract get control(): AbstractControl|null;\n\n  /**\n   * @description\n   * Reports the value of the control if it is present, otherwise null.\n   */\n  get value(): any {\n    return this.control ? this.control.value : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is valid. A control is considered valid if no\n   * validation errors exist with the current value.\n   * If the control is not present, null is returned.\n   */\n  get valid(): boolean|null {\n    return this.control ? this.control.valid : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is invalid, meaning that an error exists in the input value.\n   * If the control is not present, null is returned.\n   */\n  get invalid(): boolean|null {\n    return this.control ? this.control.invalid : null;\n  }\n\n  /**\n   * @description\n   * Reports whether a control is pending, meaning that that async validation is occurring and\n   * errors are not yet available for the input value. If the control is not present, null is\n   * returned.\n   */\n  get pending(): boolean|null {\n    return this.control ? this.control.pending : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is disabled, meaning that the control is disabled\n   * in the UI and is exempt from validation checks and excluded from aggregate\n   * values of ancestor controls. If the control is not present, null is returned.\n   */\n  get disabled(): boolean|null {\n    return this.control ? this.control.disabled : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is enabled, meaning that the control is included in ancestor\n   * calculations of validity or value. If the control is not present, null is returned.\n   */\n  get enabled(): boolean|null {\n    return this.control ? this.control.enabled : null;\n  }\n\n  /**\n   * @description\n   * Reports the control's validation errors. If the control is not present, null is returned.\n   */\n  get errors(): ValidationErrors|null {\n    return this.control ? this.control.errors : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is pristine, meaning that the user has not yet changed\n   * the value in the UI. If the control is not present, null is returned.\n   */\n  get pristine(): boolean|null {\n    return this.control ? this.control.pristine : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is dirty, meaning that the user has changed\n   * the value in the UI. If the control is not present, null is returned.\n   */\n  get dirty(): boolean|null {\n    return this.control ? this.control.dirty : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is touched, meaning that the user has triggered\n   * a `blur` event on it. If the control is not present, null is returned.\n   */\n  get touched(): boolean|null {\n    return this.control ? this.control.touched : null;\n  }\n\n  /**\n   * @description\n   * Reports the validation status of the control. Possible values include:\n   * 'VALID', 'INVALID', 'DISABLED', and 'PENDING'.\n   * If the control is not present, null is returned.\n   */\n  get status(): string|null {\n    return this.control ? this.control.status : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is untouched, meaning that the user has not yet triggered\n   * a `blur` event on it. If the control is not present, null is returned.\n   */\n  get untouched(): boolean|null {\n    return this.control ? this.control.untouched : null;\n  }\n\n  /**\n   * @description\n   * Returns a multicasting observable that emits a validation status whenever it is\n   * calculated for the control. If the control is not present, null is returned.\n   */\n  get statusChanges(): Observable<any>|null {\n    return this.control ? this.control.statusChanges : null;\n  }\n\n  /**\n   * @description\n   * Returns a multicasting observable of value changes for the control that emits every time the\n   * value of the control changes in the UI or programmatically.\n   * If the control is not present, null is returned.\n   */\n  get valueChanges(): Observable<any>|null {\n    return this.control ? this.control.valueChanges : null;\n  }\n\n  /**\n   * @description\n   * Returns an array that represents the path from the top-level form to this control.\n   * Each index is the string name of the control on that level.\n   */\n  get path(): string[]|null {\n    return null;\n  }\n\n  /**\n   * @description\n   * Resets the control with the provided value if the control is present.\n   */\n  reset(value: any = undefined): void {\n    if (this.control) this.control.reset(value);\n  }\n\n  /**\n   * @description\n   * Reports whether the control with the given path has the error specified.\n   *\n   * @param errorCode The code of the error to check\n   * @param path A list of control names that designates how to move from the current control\n   * to the control that should be queried for errors.\n   *\n   * @usageNotes\n   * For example, for the following `FormGroup`:\n   *\n   * ```\n   * form = new FormGroup({\n   *   address: new FormGroup({ street: new FormControl() })\n   * });\n   * ```\n   *\n   * The path to the 'street' control from the root form would be 'address' -> 'street'.\n   *\n   * It can be provided to this method in one of two formats:\n   *\n   * 1. An array of string control names, e.g. `['address', 'street']`\n   * 1. A period-delimited list of control names in one string, e.g. `'address.street'`\n   *\n   * If no path is given, this method checks for the error on the current control.\n   *\n   * @returns whether the given error is present in the control at the given path.\n   *\n   * If the control is not present, false is returned.\n   */\n  hasError(errorCode: string, path?: Array<string|number>|string): boolean {\n    return this.control ? this.control.hasError(errorCode, path) : false;\n  }\n\n  /**\n   * @description\n   * Reports error data for the control with the given path.\n   *\n   * @param errorCode The code of the error to check\n   * @param path A list of control names that designates how to move from the current control\n   * to the control that should be queried for errors.\n   *\n   * @usageNotes\n   * For example, for the following `FormGroup`:\n   *\n   * ```\n   * form = new FormGroup({\n   *   address: new FormGroup({ street: new FormControl() })\n   * });\n   * ```\n   *\n   * The path to the 'street' control from the root form would be 'address' -> 'street'.\n   *\n   * It can be provided to this method in one of two formats:\n   *\n   * 1. An array of string control names, e.g. `['address', 'street']`\n   * 1. A period-delimited list of control names in one string, e.g. `'address.street'`\n   *\n   * @returns error data for that particular error. If the control or error is not present,\n   * null is returned.\n   */\n  getError(errorCode: string, path?: Array<string|number>|string): any {\n    return this.control ? this.control.getError(errorCode, path) : null;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {AbstractControlDirective} from './abstract_control_directive';\nimport {Form} from './form_interface';\n\n\n/**\n * @description\n * A base class for directives that contain multiple registered instances of `NgControl`.\n * Only used by the forms module.\n *\n * @publicApi\n */\nexport abstract class ControlContainer extends AbstractControlDirective {\n  /**\n   * @description\n   * The name for the control\n   */\n  // TODO(issue/24571): remove '!'.\n  name!: string|number|null;\n\n  /**\n   * @description\n   * The top-level form directive for the control.\n   */\n  get formDirective(): Form|null {\n    return null;\n  }\n\n  /**\n   * @description\n   * The path to this group.\n   */\n  get path(): string[]|null {\n    return null;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n\nimport {AbstractControlDirective} from './abstract_control_directive';\nimport {ControlContainer} from './control_container';\nimport {ControlValueAccessor} from './control_value_accessor';\nimport {AsyncValidator, AsyncValidatorFn, Validator, ValidatorFn} from './validators';\n\nfunction unimplemented(): any {\n  if (typeof ngDevMode === 'undefined' || ngDevMode) {\n    throw new Error('unimplemented');\n  }\n}\n\n/**\n * @description\n * A base class that all `FormControl`-based directives extend. It binds a `FormControl`\n * object to a DOM element.\n *\n * @publicApi\n */\nexport abstract class NgControl extends AbstractControlDirective {\n  /**\n   * @description\n   * The parent form for the control.\n   *\n   * @internal\n   */\n  _parent: ControlContainer|null = null;\n\n  /**\n   * @description\n   * The name for the control\n   */\n  name: string|number|null = null;\n\n  /**\n   * @description\n   * The value accessor for the control\n   */\n  valueAccessor: ControlValueAccessor|null = null;\n\n  /**\n   * @description\n   * The uncomposed array of synchronous validators for the control\n   *\n   * @internal\n   */\n  _rawValidators: Array<Validator|ValidatorFn> = [];\n\n  /**\n   * @description\n   * The uncomposed array of async validators for the control\n   *\n   * @internal\n   */\n  _rawAsyncValidators: Array<AsyncValidator|AsyncValidatorFn> = [];\n\n  /**\n   * @description\n   * The registered synchronous validator function for the control\n   *\n   * @throws An exception that this method is not implemented\n   */\n  get validator(): ValidatorFn|null {\n    return <ValidatorFn>unimplemented();\n  }\n\n  /**\n   * @description\n   * The registered async validator function for the control\n   *\n   * @throws An exception that this method is not implemented\n   */\n  get asyncValidator(): AsyncValidatorFn|null {\n    return <AsyncValidatorFn>unimplemented();\n  }\n\n  /**\n   * @description\n   * The callback method to update the model from the view when requested\n   *\n   * @param newValue The new value for the view\n   */\n  abstract viewToModelUpdate(newValue: any): void;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, Self} from '@angular/core';\n\nimport {AbstractControlDirective} from './abstract_control_directive';\nimport {ControlContainer} from './control_container';\nimport {NgControl} from './ng_control';\n\nexport class AbstractControlStatus {\n  private _cd: AbstractControlDirective;\n\n  constructor(cd: AbstractControlDirective) {\n    this._cd = cd;\n  }\n\n  get ngClassUntouched(): boolean {\n    return this._cd.control ? this._cd.control.untouched : false;\n  }\n  get ngClassTouched(): boolean {\n    return this._cd.control ? this._cd.control.touched : false;\n  }\n  get ngClassPristine(): boolean {\n    return this._cd.control ? this._cd.control.pristine : false;\n  }\n  get ngClassDirty(): boolean {\n    return this._cd.control ? this._cd.control.dirty : false;\n  }\n  get ngClassValid(): boolean {\n    return this._cd.control ? this._cd.control.valid : false;\n  }\n  get ngClassInvalid(): boolean {\n    return this._cd.control ? this._cd.control.invalid : false;\n  }\n  get ngClassPending(): boolean {\n    return this._cd.control ? this._cd.control.pending : false;\n  }\n}\n\nexport const ngControlStatusHost = {\n  '[class.ng-untouched]': 'ngClassUntouched',\n  '[class.ng-touched]': 'ngClassTouched',\n  '[class.ng-pristine]': 'ngClassPristine',\n  '[class.ng-dirty]': 'ngClassDirty',\n  '[class.ng-valid]': 'ngClassValid',\n  '[class.ng-invalid]': 'ngClassInvalid',\n  '[class.ng-pending]': 'ngClassPending',\n};\n\n/**\n * @description\n * Directive automatically applied to Angular form controls that sets CSS classes\n * based on control status.\n *\n * @usageNotes\n *\n * ### CSS classes applied\n *\n * The following classes are applied as the properties become true:\n *\n * * ng-valid\n * * ng-invalid\n * * ng-pending\n * * ng-pristine\n * * ng-dirty\n * * ng-untouched\n * * ng-touched\n *\n * @ngModule ReactiveFormsModule\n * @ngModule FormsModule\n * @publicApi\n */\n@Directive({selector: '[formControlName],[ngModel],[formControl]', host: ngControlStatusHost})\nexport class NgControlStatus extends AbstractControlStatus {\n  constructor(@Self() cd: NgControl) {\n    super(cd);\n  }\n}\n\n/**\n * @description\n * Directive automatically applied to Angular form groups that sets CSS classes\n * based on control status (valid/invalid/dirty/etc).\n *\n * @see `NgControlStatus`\n *\n * @ngModule ReactiveFormsModule\n * @ngModule FormsModule\n * @publicApi\n */\n@Directive({\n  selector:\n      '[formGroupName],[formArrayName],[ngModelGroup],[formGroup],form:not([ngNoForm]),[ngForm]',\n  host: ngControlStatusHost\n})\nexport class NgControlStatusGroup extends AbstractControlStatus {\n  constructor(@Self() cd: ControlContainer) {\n    super(cd);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {InjectionToken, ɵisObservable as isObservable, ɵisPromise as isPromise} from '@angular/core';\nimport {forkJoin, from, Observable} from 'rxjs';\nimport {map} from 'rxjs/operators';\n\nimport {AsyncValidator, AsyncValidatorFn, ValidationErrors, Validator, ValidatorFn} from './directives/validators';\nimport {AbstractControl} from './model';\n\nfunction isEmptyInputValue(value: any): boolean {\n  // we don't check for string here so it also works with arrays\n  return value == null || value.length === 0;\n}\n\nfunction hasValidLength(value: any): boolean {\n  // non-strict comparison is intentional, to check for both `null` and `undefined` values\n  return value != null && typeof value.length === 'number';\n}\n\n/**\n * @description\n * An `InjectionToken` for registering additional synchronous validators used with\n * `AbstractControl`s.\n *\n * @see `NG_ASYNC_VALIDATORS`\n *\n * @usageNotes\n *\n * ### Providing a custom validator\n *\n * The following example registers a custom validator directive. Adding the validator to the\n * existing collection of validators requires the `multi: true` option.\n *\n * ```typescript\n * @Directive({\n *   selector: '[customValidator]',\n *   providers: [{provide: NG_VALIDATORS, useExisting: CustomValidatorDirective, multi: true}]\n * })\n * class CustomValidatorDirective implements Validator {\n *   validate(control: AbstractControl): ValidationErrors | null {\n *     return { 'custom': true };\n *   }\n * }\n * ```\n *\n * @publicApi\n */\nexport const NG_VALIDATORS = new InjectionToken<Array<Validator|Function>>('NgValidators');\n\n/**\n * @description\n * An `InjectionToken` for registering additional asynchronous validators used with\n * `AbstractControl`s.\n *\n * @see `NG_VALIDATORS`\n *\n * @publicApi\n */\nexport const NG_ASYNC_VALIDATORS =\n    new InjectionToken<Array<Validator|Function>>('NgAsyncValidators');\n\n/**\n * A regular expression that matches valid e-mail addresses.\n *\n * At a high level, this regexp matches e-mail addresses of the format `local-part@tld`, where:\n * - `local-part` consists of one or more of the allowed characters (alphanumeric and some\n *   punctuation symbols).\n * - `local-part` cannot begin or end with a period (`.`).\n * - `local-part` cannot be longer than 64 characters.\n * - `tld` consists of one or more `labels` separated by periods (`.`). For example `localhost` or\n *   `foo.com`.\n * - A `label` consists of one or more of the allowed characters (alphanumeric, dashes (`-`) and\n *   periods (`.`)).\n * - A `label` cannot begin or end with a dash (`-`) or a period (`.`).\n * - A `label` cannot be longer than 63 characters.\n * - The whole address cannot be longer than 254 characters.\n *\n * ## Implementation background\n *\n * This regexp was ported over from AngularJS (see there for git history):\n * https://github.com/angular/angular.js/blob/c133ef836/src/ng/directive/input.js#L27\n * It is based on the\n * [WHATWG version](https://html.spec.whatwg.org/multipage/input.html#valid-e-mail-address) with\n * some enhancements to incorporate more RFC rules (such as rules related to domain names and the\n * lengths of different parts of the address). The main differences from the WHATWG version are:\n *   - Disallow `local-part` to begin or end with a period (`.`).\n *   - Disallow `local-part` length to exceed 64 characters.\n *   - Disallow total address length to exceed 254 characters.\n *\n * See [this commit](https://github.com/angular/angular.js/commit/f3f5cf72e) for more details.\n */\nconst EMAIL_REGEXP =\n    /^(?=.{1,254}$)(?=.{1,64}@)[a-zA-Z0-9!#$%&'*+/=?^_`{|}~-]+(?:\\.[a-zA-Z0-9!#$%&'*+/=?^_`{|}~-]+)*@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/;\n\n/**\n * @description\n * Provides a set of built-in validators that can be used by form controls.\n *\n * A validator is a function that processes a `FormControl` or collection of\n * controls and returns an error map or null. A null map means that validation has passed.\n *\n * @see [Form Validation](/guide/form-validation)\n *\n * @publicApi\n */\nexport class Validators {\n  /**\n   * @description\n   * Validator that requires the control's value to be greater than or equal to the provided number.\n   * The validator exists only as a function and not as a directive.\n   *\n   * @usageNotes\n   *\n   * ### Validate against a minimum of 3\n   *\n   * ```typescript\n   * const control = new FormControl(2, Validators.min(3));\n   *\n   * console.log(control.errors); // {min: {min: 3, actual: 2}}\n   * ```\n   *\n   * @returns A validator function that returns an error map with the\n   * `min` property if the validation check fails, otherwise `null`.\n   *\n   * @see `updateValueAndValidity()`\n   *\n   */\n  static min(min: number): ValidatorFn {\n    return (control: AbstractControl): ValidationErrors|null => {\n      if (isEmptyInputValue(control.value) || isEmptyInputValue(min)) {\n        return null;  // don't validate empty values to allow optional controls\n      }\n      const value = parseFloat(control.value);\n      // Controls with NaN values after parsing should be treated as not having a\n      // minimum, per the HTML forms spec: https://www.w3.org/TR/html5/forms.html#attr-input-min\n      return !isNaN(value) && value < min ? {'min': {'min': min, 'actual': control.value}} : null;\n    };\n  }\n\n  /**\n   * @description\n   * Validator that requires the control's value to be less than or equal to the provided number.\n   * The validator exists only as a function and not as a directive.\n   *\n   * @usageNotes\n   *\n   * ### Validate against a maximum of 15\n   *\n   * ```typescript\n   * const control = new FormControl(16, Validators.max(15));\n   *\n   * console.log(control.errors); // {max: {max: 15, actual: 16}}\n   * ```\n   *\n   * @returns A validator function that returns an error map with the\n   * `max` property if the validation check fails, otherwise `null`.\n   *\n   * @see `updateValueAndValidity()`\n   *\n   */\n  static max(max: number): ValidatorFn {\n    return (control: AbstractControl): ValidationErrors|null => {\n      if (isEmptyInputValue(control.value) || isEmptyInputValue(max)) {\n        return null;  // don't validate empty values to allow optional controls\n      }\n      const value = parseFloat(control.value);\n      // Controls with NaN values after parsing should be treated as not having a\n      // maximum, per the HTML forms spec: https://www.w3.org/TR/html5/forms.html#attr-input-max\n      return !isNaN(value) && value > max ? {'max': {'max': max, 'actual': control.value}} : null;\n    };\n  }\n\n  /**\n   * @description\n   * Validator that requires the control have a non-empty value.\n   *\n   * @usageNotes\n   *\n   * ### Validate that the field is non-empty\n   *\n   * ```typescript\n   * const control = new FormControl('', Validators.required);\n   *\n   * console.log(control.errors); // {required: true}\n   * ```\n   *\n   * @returns An error map with the `required` property\n   * if the validation check fails, otherwise `null`.\n   *\n   * @see `updateValueAndValidity()`\n   *\n   */\n  static required(control: AbstractControl): ValidationErrors|null {\n    return isEmptyInputValue(control.value) ? {'required': true} : null;\n  }\n\n  /**\n   * @description\n   * Validator that requires the control's value be true. This validator is commonly\n   * used for required checkboxes.\n   *\n   * @usageNotes\n   *\n   * ### Validate that the field value is true\n   *\n   * ```typescript\n   * const control = new FormControl('', Validators.requiredTrue);\n   *\n   * console.log(control.errors); // {required: true}\n   * ```\n   *\n   * @returns An error map that contains the `required` property\n   * set to `true` if the validation check fails, otherwise `null`.\n   *\n   * @see `updateValueAndValidity()`\n   *\n   */\n  static requiredTrue(control: AbstractControl): ValidationErrors|null {\n    return control.value === true ? null : {'required': true};\n  }\n\n  /**\n   * @description\n   * Validator that requires the control's value pass an email validation test.\n   *\n   * Tests the value using a [regular\n   * expression](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions)\n   * pattern suitable for common usecases. The pattern is based on the definition of a valid email\n   * address in the [WHATWG HTML\n   * specification](https://html.spec.whatwg.org/multipage/input.html#valid-e-mail-address) with\n   * some enhancements to incorporate more RFC rules (such as rules related to domain names and the\n   * lengths of different parts of the address).\n   *\n   * The differences from the WHATWG version include:\n   * - Disallow `local-part` (the part before the `@` symbol) to begin or end with a period (`.`).\n   * - Disallow `local-part` to be longer than 64 characters.\n   * - Disallow the whole address to be longer than 254 characters.\n   *\n   * If this pattern does not satisfy your business needs, you can use `Validators.pattern()` to\n   * validate the value against a different pattern.\n   *\n   * @usageNotes\n   *\n   * ### Validate that the field matches a valid email pattern\n   *\n   * ```typescript\n   * const control = new FormControl('bad@', Validators.email);\n   *\n   * console.log(control.errors); // {email: true}\n   * ```\n   *\n   * @returns An error map with the `email` property\n   * if the validation check fails, otherwise `null`.\n   *\n   * @see `updateValueAndValidity()`\n   *\n   */\n  static email(control: AbstractControl): ValidationErrors|null {\n    if (isEmptyInputValue(control.value)) {\n      return null;  // don't validate empty values to allow optional controls\n    }\n    return EMAIL_REGEXP.test(control.value) ? null : {'email': true};\n  }\n\n  /**\n   * @description\n   * Validator that requires the length of the control's value to be greater than or equal\n   * to the provided minimum length. This validator is also provided by default if you use the\n   * the HTML5 `minlength` attribute. Note that the `minLength` validator is intended to be used\n   * only for types that have a numeric `length` property, such as strings or arrays. The\n   * `minLength` validator logic is also not invoked for values when their `length` property is 0\n   * (for example in case of an empty string or an empty array), to support optional controls. You\n   * can use the standard `required` validator if empty values should not be considered valid.\n   *\n   * @usageNotes\n   *\n   * ### Validate that the field has a minimum of 3 characters\n   *\n   * ```typescript\n   * const control = new FormControl('ng', Validators.minLength(3));\n   *\n   * console.log(control.errors); // {minlength: {requiredLength: 3, actualLength: 2}}\n   * ```\n   *\n   * ```html\n   * <input minlength=\"5\">\n   * ```\n   *\n   * @returns A validator function that returns an error map with the\n   * `minlength` if the validation check fails, otherwise `null`.\n   *\n   * @see `updateValueAndValidity()`\n   *\n   */\n  static minLength(minLength: number): ValidatorFn {\n    return (control: AbstractControl): ValidationErrors|null => {\n      if (isEmptyInputValue(control.value) || !hasValidLength(control.value)) {\n        // don't validate empty values to allow optional controls\n        // don't validate values without `length` property\n        return null;\n      }\n\n      return control.value.length < minLength ?\n          {'minlength': {'requiredLength': minLength, 'actualLength': control.value.length}} :\n          null;\n    };\n  }\n\n  /**\n   * @description\n   * Validator that requires the length of the control's value to be less than or equal\n   * to the provided maximum length. This validator is also provided by default if you use the\n   * the HTML5 `maxlength` attribute. Note that the `maxLength` validator is intended to be used\n   * only for types that have a numeric `length` property, such as strings or arrays.\n   *\n   * @usageNotes\n   *\n   * ### Validate that the field has maximum of 5 characters\n   *\n   * ```typescript\n   * const control = new FormControl('Angular', Validators.maxLength(5));\n   *\n   * console.log(control.errors); // {maxlength: {requiredLength: 5, actualLength: 7}}\n   * ```\n   *\n   * ```html\n   * <input maxlength=\"5\">\n   * ```\n   *\n   * @returns A validator function that returns an error map with the\n   * `maxlength` property if the validation check fails, otherwise `null`.\n   *\n   * @see `updateValueAndValidity()`\n   *\n   */\n  static maxLength(maxLength: number): ValidatorFn {\n    return (control: AbstractControl): ValidationErrors|null => {\n      return hasValidLength(control.value) && control.value.length > maxLength ?\n          {'maxlength': {'requiredLength': maxLength, 'actualLength': control.value.length}} :\n          null;\n    };\n  }\n\n  /**\n   * @description\n   * Validator that requires the control's value to match a regex pattern. This validator is also\n   * provided by default if you use the HTML5 `pattern` attribute.\n   *\n   * @usageNotes\n   *\n   * ### Validate that the field only contains letters or spaces\n   *\n   * ```typescript\n   * const control = new FormControl('1', Validators.pattern('[a-zA-Z ]*'));\n   *\n   * console.log(control.errors); // {pattern: {requiredPattern: '^[a-zA-Z ]*$', actualValue: '1'}}\n   * ```\n   *\n   * ```html\n   * <input pattern=\"[a-zA-Z ]*\">\n   * ```\n   *\n   * @param pattern A regular expression to be used as is to test the values, or a string.\n   * If a string is passed, the `^` character is prepended and the `$` character is\n   * appended to the provided string (if not already present), and the resulting regular\n   * expression is used to test the values.\n   *\n   * @returns A validator function that returns an error map with the\n   * `pattern` property if the validation check fails, otherwise `null`.\n   *\n   * @see `updateValueAndValidity()`\n   *\n   */\n  static pattern(pattern: string|RegExp): ValidatorFn {\n    if (!pattern) return Validators.nullValidator;\n    let regex: RegExp;\n    let regexStr: string;\n    if (typeof pattern === 'string') {\n      regexStr = '';\n\n      if (pattern.charAt(0) !== '^') regexStr += '^';\n\n      regexStr += pattern;\n\n      if (pattern.charAt(pattern.length - 1) !== '$') regexStr += '$';\n\n      regex = new RegExp(regexStr);\n    } else {\n      regexStr = pattern.toString();\n      regex = pattern;\n    }\n    return (control: AbstractControl): ValidationErrors|null => {\n      if (isEmptyInputValue(control.value)) {\n        return null;  // don't validate empty values to allow optional controls\n      }\n      const value: string = control.value;\n      return regex.test(value) ? null :\n                                 {'pattern': {'requiredPattern': regexStr, 'actualValue': value}};\n    };\n  }\n\n  /**\n   * @description\n   * Validator that performs no operation.\n   *\n   * @see `updateValueAndValidity()`\n   *\n   */\n  static nullValidator(control: AbstractControl): ValidationErrors|null {\n    return null;\n  }\n\n  /**\n   * @description\n   * Compose multiple validators into a single function that returns the union\n   * of the individual error maps for the provided control.\n   *\n   * @returns A validator function that returns an error map with the\n   * merged error maps of the validators if the validation check fails, otherwise `null`.\n   *\n   * @see `updateValueAndValidity()`\n   *\n   */\n  static compose(validators: null): null;\n  static compose(validators: (ValidatorFn|null|undefined)[]): ValidatorFn|null;\n  static compose(validators: (ValidatorFn|null|undefined)[]|null): ValidatorFn|null {\n    if (!validators) return null;\n    const presentValidators: ValidatorFn[] = validators.filter(isPresent) as any;\n    if (presentValidators.length == 0) return null;\n\n    return function(control: AbstractControl) {\n      return mergeErrors(executeValidators<ValidatorFn>(control, presentValidators));\n    };\n  }\n\n  /**\n   * @description\n   * Compose multiple async validators into a single function that returns the union\n   * of the individual error objects for the provided control.\n   *\n   * @returns A validator function that returns an error map with the\n   * merged error objects of the async validators if the validation check fails, otherwise `null`.\n   *\n   * @see `updateValueAndValidity()`\n   *\n   */\n  static composeAsync(validators: (AsyncValidatorFn|null)[]): AsyncValidatorFn|null {\n    if (!validators) return null;\n    const presentValidators: AsyncValidatorFn[] = validators.filter(isPresent) as any;\n    if (presentValidators.length == 0) return null;\n\n    return function(control: AbstractControl) {\n      const observables =\n          executeValidators<AsyncValidatorFn>(control, presentValidators).map(toObservable);\n      return forkJoin(observables).pipe(map(mergeErrors));\n    };\n  }\n}\n\nfunction isPresent(o: any): boolean {\n  return o != null;\n}\n\nexport function toObservable(r: any): Observable<any> {\n  const obs = isPromise(r) ? from(r) : r;\n  if (!(isObservable(obs)) && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n    throw new Error(`Expected validator to return Promise or Observable.`);\n  }\n  return obs;\n}\n\nfunction mergeErrors(arrayOfErrors: (ValidationErrors|null)[]): ValidationErrors|null {\n  let res: {[key: string]: any} = {};\n\n  // Not using Array.reduce here due to a Chrome 80 bug\n  // https://bugs.chromium.org/p/chromium/issues/detail?id=1049982\n  arrayOfErrors.forEach((errors: ValidationErrors|null) => {\n    res = errors != null ? {...res!, ...errors} : res!;\n  });\n\n  return Object.keys(res).length === 0 ? null : res;\n}\n\ntype GenericValidatorFn = (control: AbstractControl) => any;\n\nfunction executeValidators<V extends GenericValidatorFn>(\n    control: AbstractControl, validators: V[]): ReturnType<V>[] {\n  return validators.map(validator => validator(control));\n}\n\nfunction isValidatorFn<V>(validator: V|Validator|AsyncValidator): validator is V {\n  return !(validator as Validator).validate;\n}\n\n/**\n * Given the list of validators that may contain both functions as well as classes, return the list\n * of validator functions (convert validator classes into validator functions). This is needed to\n * have consistent structure in validators list before composing them.\n *\n * @param validators The set of validators that may contain validators both in plain function form\n *     as well as represented as a validator class.\n */\nexport function normalizeValidators<V>(validators: (V|Validator|AsyncValidator)[]): V[] {\n  return validators.map(validator => {\n    return isValidatorFn<V>(validator) ?\n        validator :\n        ((c: AbstractControl) => validator.validate(c)) as unknown as V;\n  });\n}","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, ElementRef, forwardRef, Renderer2} from '@angular/core';\n\nimport {ControlValueAccessor, NG_VALUE_ACCESSOR} from './control_value_accessor';\n\nexport const NUMBER_VALUE_ACCESSOR: any = {\n  provide: NG_VALUE_ACCESSOR,\n  useExisting: forwardRef(() => NumberValueAccessor),\n  multi: true\n};\n\n/**\n * @description\n * The `ControlValueAccessor` for writing a number value and listening to number input changes.\n * The value accessor is used by the `FormControlDirective`, `FormControlName`, and `NgModel`\n * directives.\n *\n * @usageNotes\n *\n * ### Using a number input with a reactive form.\n *\n * The following example shows how to use a number input with a reactive form.\n *\n * ```ts\n * const totalCountControl = new FormControl();\n * ```\n *\n * ```\n * <input type=\"number\" [formControl]=\"totalCountControl\">\n * ```\n *\n * @ngModule ReactiveFormsModule\n * @ngModule FormsModule\n * @publicApi\n */\n@Directive({\n  selector:\n      'input[type=number][formControlName],input[type=number][formControl],input[type=number][ngModel]',\n  host: {'(input)': 'onChange($event.target.value)', '(blur)': 'onTouched()'},\n  providers: [NUMBER_VALUE_ACCESSOR]\n})\nexport class NumberValueAccessor implements ControlValueAccessor {\n  /**\n   * The registered callback function called when a change or input event occurs on the input\n   * element.\n   * @nodoc\n   */\n  onChange = (_: any) => {};\n\n  /**\n   * The registered callback function called when a blur event occurs on the input element.\n   * @nodoc\n   */\n  onTouched = () => {};\n\n  constructor(private _renderer: Renderer2, private _elementRef: ElementRef) {}\n\n  /**\n   * Sets the \"value\" property on the input element.\n   * @nodoc\n   */\n  writeValue(value: number): void {\n    // The value needs to be normalized for IE9, otherwise it is set to 'null' when null\n    const normalizedValue = value == null ? '' : value;\n    this._renderer.setProperty(this._elementRef.nativeElement, 'value', normalizedValue);\n  }\n\n  /**\n   * Registers a function called when the control value changes.\n   * @nodoc\n   */\n  registerOnChange(fn: (_: number|null) => void): void {\n    this.onChange = (value) => {\n      fn(value == '' ? null : parseFloat(value));\n    };\n  }\n\n  /**\n   * Registers a function called when the control is touched.\n   * @nodoc\n   */\n  registerOnTouched(fn: () => void): void {\n    this.onTouched = fn;\n  }\n\n  /**\n   * Sets the \"disabled\" property on the input element.\n   * @nodoc\n   */\n  setDisabledState(isDisabled: boolean): void {\n    this._renderer.setProperty(this._elementRef.nativeElement, 'disabled', isDisabled);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, ElementRef, forwardRef, Injectable, Injector, Input, OnDestroy, OnInit, Renderer2} from '@angular/core';\n\nimport {ControlValueAccessor, NG_VALUE_ACCESSOR} from './control_value_accessor';\nimport {NgControl} from './ng_control';\n\nexport const RADIO_VALUE_ACCESSOR: any = {\n  provide: NG_VALUE_ACCESSOR,\n  useExisting: forwardRef(() => RadioControlValueAccessor),\n  multi: true\n};\n\nfunction throwNameError() {\n  throw new Error(`\n      If you define both a name and a formControlName attribute on your radio button, their values\n      must match. Ex: <input type=\"radio\" formControlName=\"food\" name=\"food\">\n    `);\n}\n\n/**\n * @description\n * Class used by Angular to track radio buttons. For internal use only.\n */\n@Injectable()\nexport class RadioControlRegistry {\n  private _accessors: any[] = [];\n\n  /**\n   * @description\n   * Adds a control to the internal registry. For internal use only.\n   */\n  add(control: NgControl, accessor: RadioControlValueAccessor) {\n    this._accessors.push([control, accessor]);\n  }\n\n  /**\n   * @description\n   * Removes a control from the internal registry. For internal use only.\n   */\n  remove(accessor: RadioControlValueAccessor) {\n    for (let i = this._accessors.length - 1; i >= 0; --i) {\n      if (this._accessors[i][1] === accessor) {\n        this._accessors.splice(i, 1);\n        return;\n      }\n    }\n  }\n\n  /**\n   * @description\n   * Selects a radio button. For internal use only.\n   */\n  select(accessor: RadioControlValueAccessor) {\n    this._accessors.forEach((c) => {\n      if (this._isSameGroup(c, accessor) && c[1] !== accessor) {\n        c[1].fireUncheck(accessor.value);\n      }\n    });\n  }\n\n  private _isSameGroup(\n      controlPair: [NgControl, RadioControlValueAccessor],\n      accessor: RadioControlValueAccessor): boolean {\n    if (!controlPair[0].control) return false;\n    return controlPair[0]._parent === accessor._control._parent &&\n        controlPair[1].name === accessor.name;\n  }\n}\n\n/**\n * @description\n * The `ControlValueAccessor` for writing radio control values and listening to radio control\n * changes. The value accessor is used by the `FormControlDirective`, `FormControlName`, and\n * `NgModel` directives.\n *\n * @usageNotes\n *\n * ### Using radio buttons with reactive form directives\n *\n * The follow example shows how to use radio buttons in a reactive form. When using radio buttons in\n * a reactive form, radio buttons in the same group should have the same `formControlName`.\n * Providing a `name` attribute is optional.\n *\n * {@example forms/ts/reactiveRadioButtons/reactive_radio_button_example.ts region='Reactive'}\n *\n * @ngModule ReactiveFormsModule\n * @ngModule FormsModule\n * @publicApi\n */\n@Directive({\n  selector:\n      'input[type=radio][formControlName],input[type=radio][formControl],input[type=radio][ngModel]',\n  host: {'(change)': 'onChange()', '(blur)': 'onTouched()'},\n  providers: [RADIO_VALUE_ACCESSOR]\n})\nexport class RadioControlValueAccessor implements ControlValueAccessor, OnDestroy, OnInit {\n  /** @internal */\n  // TODO(issue/24571): remove '!'.\n  _state!: boolean;\n  /** @internal */\n  // TODO(issue/24571): remove '!'.\n  _control!: NgControl;\n  /** @internal */\n  // TODO(issue/24571): remove '!'.\n  _fn!: Function;\n\n  /**\n   * The registered callback function called when a change event occurs on the input element.\n   * @nodoc\n   */\n  onChange = () => {};\n\n  /**\n   * The registered callback function called when a blur event occurs on the input element.\n   * @nodoc\n   */\n  onTouched = () => {};\n\n  /**\n   * @description\n   * Tracks the name of the radio input element.\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input() name!: string;\n\n  /**\n   * @description\n   * Tracks the name of the `FormControl` bound to the directive. The name corresponds\n   * to a key in the parent `FormGroup` or `FormArray`.\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input() formControlName!: string;\n\n  /**\n   * @description\n   * Tracks the value of the radio input element\n   */\n  @Input() value: any;\n\n  constructor(\n      private _renderer: Renderer2, private _elementRef: ElementRef,\n      private _registry: RadioControlRegistry, private _injector: Injector) {}\n\n  /** @nodoc */\n  ngOnInit(): void {\n    this._control = this._injector.get(NgControl);\n    this._checkName();\n    this._registry.add(this._control, this);\n  }\n\n  /** @nodoc */\n  ngOnDestroy(): void {\n    this._registry.remove(this);\n  }\n\n  /**\n   * Sets the \"checked\" property value on the radio input element.\n   * @nodoc\n   */\n  writeValue(value: any): void {\n    this._state = value === this.value;\n    this._renderer.setProperty(this._elementRef.nativeElement, 'checked', this._state);\n  }\n\n  /**\n   * Registers a function called when the control value changes.\n   * @nodoc\n   */\n  registerOnChange(fn: (_: any) => {}): void {\n    this._fn = fn;\n    this.onChange = () => {\n      fn(this.value);\n      this._registry.select(this);\n    };\n  }\n\n  /**\n   * Sets the \"value\" on the radio input element and unchecks it.\n   *\n   * @param value\n   */\n  fireUncheck(value: any): void {\n    this.writeValue(value);\n  }\n\n  /**\n   * Registers a function called when the control is touched.\n   * @nodoc\n   */\n  registerOnTouched(fn: () => {}): void {\n    this.onTouched = fn;\n  }\n\n  /**\n   * Sets the \"disabled\" property on the input element.\n   * @nodoc\n   */\n  setDisabledState(isDisabled: boolean): void {\n    this._renderer.setProperty(this._elementRef.nativeElement, 'disabled', isDisabled);\n  }\n\n  private _checkName(): void {\n    if (this.name && this.formControlName && this.name !== this.formControlName &&\n        (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throwNameError();\n    }\n    if (!this.name && this.formControlName) this.name = this.formControlName;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, ElementRef, forwardRef, Renderer2, StaticProvider} from '@angular/core';\n\nimport {ControlValueAccessor, NG_VALUE_ACCESSOR} from './control_value_accessor';\n\nexport const RANGE_VALUE_ACCESSOR: StaticProvider = {\n  provide: NG_VALUE_ACCESSOR,\n  useExisting: forwardRef(() => RangeValueAccessor),\n  multi: true\n};\n\n/**\n * @description\n * The `ControlValueAccessor` for writing a range value and listening to range input changes.\n * The value accessor is used by the `FormControlDirective`, `FormControlName`, and  `NgModel`\n * directives.\n *\n * @usageNotes\n *\n * ### Using a range input with a reactive form\n *\n * The following example shows how to use a range input with a reactive form.\n *\n * ```ts\n * const ageControl = new FormControl();\n * ```\n *\n * ```\n * <input type=\"range\" [formControl]=\"ageControl\">\n * ```\n *\n * @ngModule ReactiveFormsModule\n * @ngModule FormsModule\n * @publicApi\n */\n@Directive({\n  selector:\n      'input[type=range][formControlName],input[type=range][formControl],input[type=range][ngModel]',\n  host: {\n    '(change)': 'onChange($event.target.value)',\n    '(input)': 'onChange($event.target.value)',\n    '(blur)': 'onTouched()'\n  },\n  providers: [RANGE_VALUE_ACCESSOR]\n})\nexport class RangeValueAccessor implements ControlValueAccessor {\n  /**\n   * The registered callback function called when a change or input event occurs on the input\n   * element.\n   * @nodoc\n   */\n  onChange = (_: any) => {};\n\n  /**\n   * The registered callback function called when a blur event occurs on the input element.\n   * @nodoc\n   */\n  onTouched = () => {};\n\n  constructor(private _renderer: Renderer2, private _elementRef: ElementRef) {}\n\n  /**\n   * Sets the \"value\" property on the input element.\n   * @nodoc\n   */\n  writeValue(value: any): void {\n    this._renderer.setProperty(this._elementRef.nativeElement, 'value', parseFloat(value));\n  }\n\n  /**\n   * Registers a function called when the control value changes.\n   * @nodoc\n   */\n  registerOnChange(fn: (_: number|null) => void): void {\n    this.onChange = (value) => {\n      fn(value == '' ? null : parseFloat(value));\n    };\n  }\n\n  /**\n   * Registers a function called when the control is touched.\n   * @nodoc\n   */\n  registerOnTouched(fn: () => void): void {\n    this.onTouched = fn;\n  }\n\n  /**\n   * Sets the \"disabled\" property on the range input element.\n   * @nodoc\n   */\n  setDisabledState(isDisabled: boolean): void {\n    this._renderer.setProperty(this._elementRef.nativeElement, 'disabled', isDisabled);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport const FormErrorExamples = {\n  formControlName: `\n    <div [formGroup]=\"myGroup\">\n      <input formControlName=\"firstName\">\n    </div>\n\n    In your class:\n\n    this.myGroup = new FormGroup({\n       firstName: new FormControl()\n    });`,\n\n  formGroupName: `\n    <div [formGroup]=\"myGroup\">\n       <div formGroupName=\"person\">\n          <input formControlName=\"firstName\">\n       </div>\n    </div>\n\n    In your class:\n\n    this.myGroup = new FormGroup({\n       person: new FormGroup({ firstName: new FormControl() })\n    });`,\n\n  formArrayName: `\n    <div [formGroup]=\"myGroup\">\n      <div formArrayName=\"cities\">\n        <div *ngFor=\"let city of cityArray.controls; index as i\">\n          <input [formControlName]=\"i\">\n        </div>\n      </div>\n    </div>\n\n    In your class:\n\n    this.cityArray = new FormArray([new FormControl('SF')]);\n    this.myGroup = new FormGroup({\n      cities: this.cityArray\n    });`,\n\n  ngModelGroup: `\n    <form>\n       <div ngModelGroup=\"person\">\n          <input [(ngModel)]=\"person.name\" name=\"firstName\">\n       </div>\n    </form>`,\n\n  ngModelWithFormGroup: `\n    <div [formGroup]=\"myGroup\">\n       <input formControlName=\"firstName\">\n       <input [(ngModel)]=\"showMoreControls\" [ngModelOptions]=\"{standalone: true}\">\n    </div>\n  `\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n\nimport {FormErrorExamples as Examples} from './error_examples';\n\nexport class ReactiveErrors {\n  static controlParentException(): void {\n    throw new Error(\n        `formControlName must be used with a parent formGroup directive.  You'll want to add a formGroup\n       directive and pass it an existing FormGroup instance (you can create one in your class).\n\n      Example:\n\n      ${Examples.formControlName}`);\n  }\n\n  static ngModelGroupException(): void {\n    throw new Error(\n        `formControlName cannot be used with an ngModelGroup parent. It is only compatible with parents\n       that also have a \"form\" prefix: formGroupName, formArrayName, or formGroup.\n\n       Option 1:  Update the parent to be formGroupName (reactive form strategy)\n\n        ${Examples.formGroupName}\n\n        Option 2: Use ngModel instead of formControlName (template-driven strategy)\n\n        ${Examples.ngModelGroup}`);\n  }\n\n  static missingFormException(): void {\n    throw new Error(`formGroup expects a FormGroup instance. Please pass one in.\n\n       Example:\n\n       ${Examples.formControlName}`);\n  }\n\n  static groupParentException(): void {\n    throw new Error(\n        `formGroupName must be used with a parent formGroup directive.  You'll want to add a formGroup\n      directive and pass it an existing FormGroup instance (you can create one in your class).\n\n      Example:\n\n      ${Examples.formGroupName}`);\n  }\n\n  static arrayParentException(): void {\n    throw new Error(\n        `formArrayName must be used with a parent formGroup directive.  You'll want to add a formGroup\n       directive and pass it an existing FormGroup instance (you can create one in your class).\n\n        Example:\n\n        ${Examples.formArrayName}`);\n  }\n\n  static disabledAttrWarning(): void {\n    console.warn(`\n      It looks like you're using the disabled attribute with a reactive form directive. If you set disabled to true\n      when you set up this control in your component class, the disabled attribute will actually be set in the DOM for\n      you. We recommend using this approach to avoid 'changed after checked' errors.\n\n      Example:\n      form = new FormGroup({\n        first: new FormControl({value: 'Nancy', disabled: true}, Validators.required),\n        last: new FormControl('Drew', Validators.required)\n      });\n    `);\n  }\n\n  static ngModelWarning(directiveName: string): void {\n    console.warn(`\n    It looks like you're using ngModel on the same form field as ${directiveName}.\n    Support for using the ngModel input property and ngModelChange event with\n    reactive form directives has been deprecated in Angular v6 and will be removed\n    in a future version of Angular.\n\n    For more information on this, see our API docs here:\n    https://angular.io/api/forms/${\n        directiveName === 'formControl' ? 'FormControlDirective' :\n                                          'FormControlName'}#use-with-ngmodel\n    `);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, ElementRef, forwardRef, Host, Input, OnDestroy, Optional, Renderer2, StaticProvider} from '@angular/core';\n\nimport {ControlValueAccessor, NG_VALUE_ACCESSOR} from './control_value_accessor';\n\nexport const SELECT_VALUE_ACCESSOR: StaticProvider = {\n  provide: NG_VALUE_ACCESSOR,\n  useExisting: forwardRef(() => SelectControlValueAccessor),\n  multi: true\n};\n\nfunction _buildValueString(id: string|null, value: any): string {\n  if (id == null) return `${value}`;\n  if (value && typeof value === 'object') value = 'Object';\n  return `${id}: ${value}`.slice(0, 50);\n}\n\nfunction _extractId(valueString: string): string {\n  return valueString.split(':')[0];\n}\n\n/**\n * @description\n * The `ControlValueAccessor` for writing select control values and listening to select control\n * changes. The value accessor is used by the `FormControlDirective`, `FormControlName`, and\n * `NgModel` directives.\n *\n * @usageNotes\n *\n * ### Using select controls in a reactive form\n *\n * The following examples show how to use a select control in a reactive form.\n *\n * {@example forms/ts/reactiveSelectControl/reactive_select_control_example.ts region='Component'}\n *\n * ### Using select controls in a template-driven form\n *\n * To use a select in a template-driven form, simply add an `ngModel` and a `name`\n * attribute to the main `<select>` tag.\n *\n * {@example forms/ts/selectControl/select_control_example.ts region='Component'}\n *\n * ### Customizing option selection\n *\n * Angular uses object identity to select option. It's possible for the identities of items\n * to change while the data does not. This can happen, for example, if the items are produced\n * from an RPC to the server, and that RPC is re-run. Even if the data hasn't changed, the\n * second response will produce objects with different identities.\n *\n * To customize the default option comparison algorithm, `<select>` supports `compareWith` input.\n * `compareWith` takes a **function** which has two arguments: `option1` and `option2`.\n * If `compareWith` is given, Angular selects option by the return value of the function.\n *\n * ```ts\n * const selectedCountriesControl = new FormControl();\n * ```\n *\n * ```\n * <select [compareWith]=\"compareFn\"  [formControl]=\"selectedCountriesControl\">\n *     <option *ngFor=\"let country of countries\" [ngValue]=\"country\">\n *         {{country.name}}\n *     </option>\n * </select>\n *\n * compareFn(c1: Country, c2: Country): boolean {\n *     return c1 && c2 ? c1.id === c2.id : c1 === c2;\n * }\n * ```\n *\n * **Note:** We listen to the 'change' event because 'input' events aren't fired\n * for selects in Firefox and IE:\n * https://bugzilla.mozilla.org/show_bug.cgi?id=1024350\n * https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/4660045/\n *\n * @ngModule ReactiveFormsModule\n * @ngModule FormsModule\n * @publicApi\n */\n@Directive({\n  selector:\n      'select:not([multiple])[formControlName],select:not([multiple])[formControl],select:not([multiple])[ngModel]',\n  host: {'(change)': 'onChange($event.target.value)', '(blur)': 'onTouched()'},\n  providers: [SELECT_VALUE_ACCESSOR]\n})\nexport class SelectControlValueAccessor implements ControlValueAccessor {\n  /** @nodoc */\n  value: any;\n\n  /** @internal */\n  _optionMap: Map<string, any> = new Map<string, any>();\n\n  /** @internal */\n  _idCounter: number = 0;\n\n  /**\n   * The registered callback function called when a change event occurs on the input element.\n   * @nodoc\n   */\n  onChange = (_: any) => {};\n\n  /**\n   * The registered callback function called when a blur event occurs on the input element.\n   * @nodoc\n   */\n  onTouched = () => {};\n\n  /**\n   * @description\n   * Tracks the option comparison algorithm for tracking identities when\n   * checking for changes.\n   */\n  @Input()\n  set compareWith(fn: (o1: any, o2: any) => boolean) {\n    if (typeof fn !== 'function' && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw new Error(`compareWith must be a function, but received ${JSON.stringify(fn)}`);\n    }\n    this._compareWith = fn;\n  }\n\n  private _compareWith: (o1: any, o2: any) => boolean = Object.is;\n\n  constructor(private _renderer: Renderer2, private _elementRef: ElementRef) {}\n\n  /**\n   * Sets the \"value\" property on the input element. The \"selectedIndex\"\n   * property is also set if an ID is provided on the option element.\n   * @nodoc\n   */\n  writeValue(value: any): void {\n    this.value = value;\n    const id: string|null = this._getOptionId(value);\n    if (id == null) {\n      this._renderer.setProperty(this._elementRef.nativeElement, 'selectedIndex', -1);\n    }\n    const valueString = _buildValueString(id, value);\n    this._renderer.setProperty(this._elementRef.nativeElement, 'value', valueString);\n  }\n\n  /**\n   * Registers a function called when the control value changes.\n   * @nodoc\n   */\n  registerOnChange(fn: (value: any) => any): void {\n    this.onChange = (valueString: string) => {\n      this.value = this._getOptionValue(valueString);\n      fn(this.value);\n    };\n  }\n\n  /**\n   * Registers a function called when the control is touched.\n   * @nodoc\n   */\n  registerOnTouched(fn: () => any): void {\n    this.onTouched = fn;\n  }\n\n  /**\n   * Sets the \"disabled\" property on the select input element.\n   * @nodoc\n   */\n  setDisabledState(isDisabled: boolean): void {\n    this._renderer.setProperty(this._elementRef.nativeElement, 'disabled', isDisabled);\n  }\n\n  /** @internal */\n  _registerOption(): string {\n    return (this._idCounter++).toString();\n  }\n\n  /** @internal */\n  _getOptionId(value: any): string|null {\n    for (const id of Array.from(this._optionMap.keys())) {\n      if (this._compareWith(this._optionMap.get(id), value)) return id;\n    }\n    return null;\n  }\n\n  /** @internal */\n  _getOptionValue(valueString: string): any {\n    const id: string = _extractId(valueString);\n    return this._optionMap.has(id) ? this._optionMap.get(id) : valueString;\n  }\n}\n\n/**\n * @description\n * Marks `<option>` as dynamic, so Angular can be notified when options change.\n *\n * @see `SelectControlValueAccessor`\n *\n * @ngModule ReactiveFormsModule\n * @ngModule FormsModule\n * @publicApi\n */\n@Directive({selector: 'option'})\nexport class NgSelectOption implements OnDestroy {\n  /**\n   * @description\n   * ID of the option element\n   */\n  // TODO(issue/24571): remove '!'.\n  id!: string;\n\n  constructor(\n      private _element: ElementRef, private _renderer: Renderer2,\n      @Optional() @Host() private _select: SelectControlValueAccessor) {\n    if (this._select) this.id = this._select._registerOption();\n  }\n\n  /**\n   * @description\n   * Tracks the value bound to the option element. Unlike the value binding,\n   * ngValue supports binding to objects.\n   */\n  @Input('ngValue')\n  set ngValue(value: any) {\n    if (this._select == null) return;\n    this._select._optionMap.set(this.id, value);\n    this._setElementValue(_buildValueString(this.id, value));\n    this._select.writeValue(this._select.value);\n  }\n\n  /**\n   * @description\n   * Tracks simple string values bound to the option element.\n   * For objects, use the `ngValue` input binding.\n   */\n  @Input('value')\n  set value(value: any) {\n    this._setElementValue(value);\n    if (this._select) this._select.writeValue(this._select.value);\n  }\n\n  /** @internal */\n  _setElementValue(value: string): void {\n    this._renderer.setProperty(this._element.nativeElement, 'value', value);\n  }\n\n  /** @nodoc */\n  ngOnDestroy(): void {\n    if (this._select) {\n      this._select._optionMap.delete(this.id);\n      this._select.writeValue(this._select.value);\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, ElementRef, forwardRef, Host, Input, OnDestroy, Optional, Renderer2, StaticProvider} from '@angular/core';\n\nimport {ControlValueAccessor, NG_VALUE_ACCESSOR} from './control_value_accessor';\n\nexport const SELECT_MULTIPLE_VALUE_ACCESSOR: StaticProvider = {\n  provide: NG_VALUE_ACCESSOR,\n  useExisting: forwardRef(() => SelectMultipleControlValueAccessor),\n  multi: true\n};\n\nfunction _buildValueString(id: string, value: any): string {\n  if (id == null) return `${value}`;\n  if (typeof value === 'string') value = `'${value}'`;\n  if (value && typeof value === 'object') value = 'Object';\n  return `${id}: ${value}`.slice(0, 50);\n}\n\nfunction _extractId(valueString: string): string {\n  return valueString.split(':')[0];\n}\n\n/** Mock interface for HTML Options */\ninterface HTMLOption {\n  value: string;\n  selected: boolean;\n}\n\n/** Mock interface for HTMLCollection */\nabstract class HTMLCollection {\n  // TODO(issue/24571): remove '!'.\n  length!: number;\n  abstract item(_: number): HTMLOption;\n}\n\n/**\n * @description\n * The `ControlValueAccessor` for writing multi-select control values and listening to multi-select\n * control changes. The value accessor is used by the `FormControlDirective`, `FormControlName`, and\n * `NgModel` directives.\n *\n * @see `SelectControlValueAccessor`\n *\n * @usageNotes\n *\n * ### Using a multi-select control\n *\n * The follow example shows you how to use a multi-select control with a reactive form.\n *\n * ```ts\n * const countryControl = new FormControl();\n * ```\n *\n * ```\n * <select multiple name=\"countries\" [formControl]=\"countryControl\">\n *   <option *ngFor=\"let country of countries\" [ngValue]=\"country\">\n *     {{ country.name }}\n *   </option>\n * </select>\n * ```\n *\n * ### Customizing option selection\n *\n * To customize the default option comparison algorithm, `<select>` supports `compareWith` input.\n * See the `SelectControlValueAccessor` for usage.\n *\n * @ngModule ReactiveFormsModule\n * @ngModule FormsModule\n * @publicApi\n */\n@Directive({\n  selector:\n      'select[multiple][formControlName],select[multiple][formControl],select[multiple][ngModel]',\n  host: {'(change)': 'onChange($event.target)', '(blur)': 'onTouched()'},\n  providers: [SELECT_MULTIPLE_VALUE_ACCESSOR]\n})\nexport class SelectMultipleControlValueAccessor implements ControlValueAccessor {\n  /**\n   * The current value.\n   * @nodoc\n   */\n  value: any;\n\n  /** @internal */\n  _optionMap: Map<string, ɵNgSelectMultipleOption> = new Map<string, ɵNgSelectMultipleOption>();\n\n  /** @internal */\n  _idCounter: number = 0;\n\n  /**\n   * The registered callback function called when a change event occurs on the input element.\n   * @nodoc\n   */\n  onChange = (_: any) => {};\n\n  /**\n   * The registered callback function called when a blur event occurs on the input element.\n   * @nodoc\n   */\n  onTouched = () => {};\n\n  /**\n   * @description\n   * Tracks the option comparison algorithm for tracking identities when\n   * checking for changes.\n   */\n  @Input()\n  set compareWith(fn: (o1: any, o2: any) => boolean) {\n    if (typeof fn !== 'function' && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw new Error(`compareWith must be a function, but received ${JSON.stringify(fn)}`);\n    }\n    this._compareWith = fn;\n  }\n\n  private _compareWith: (o1: any, o2: any) => boolean = Object.is;\n\n  constructor(private _renderer: Renderer2, private _elementRef: ElementRef) {}\n\n  /**\n   * Sets the \"value\" property on one or of more of the select's options.\n   * @nodoc\n   */\n  writeValue(value: any): void {\n    this.value = value;\n    let optionSelectedStateSetter: (opt: ɵNgSelectMultipleOption, o: any) => void;\n    if (Array.isArray(value)) {\n      // convert values to ids\n      const ids = value.map((v) => this._getOptionId(v));\n      optionSelectedStateSetter = (opt, o) => {\n        opt._setSelected(ids.indexOf(o.toString()) > -1);\n      };\n    } else {\n      optionSelectedStateSetter = (opt, o) => {\n        opt._setSelected(false);\n      };\n    }\n    this._optionMap.forEach(optionSelectedStateSetter);\n  }\n\n  /**\n   * Registers a function called when the control value changes\n   * and writes an array of the selected options.\n   * @nodoc\n   */\n  registerOnChange(fn: (value: any) => any): void {\n    this.onChange = (_: any) => {\n      const selected: Array<any> = [];\n      if (_.selectedOptions !== undefined) {\n        const options: HTMLCollection = _.selectedOptions;\n        for (let i = 0; i < options.length; i++) {\n          const opt: any = options.item(i);\n          const val: any = this._getOptionValue(opt.value);\n          selected.push(val);\n        }\n      }\n      // Degrade on IE\n      else {\n        const options: HTMLCollection = <HTMLCollection>_.options;\n        for (let i = 0; i < options.length; i++) {\n          const opt: HTMLOption = options.item(i);\n          if (opt.selected) {\n            const val: any = this._getOptionValue(opt.value);\n            selected.push(val);\n          }\n        }\n      }\n      this.value = selected;\n      fn(selected);\n    };\n  }\n\n  /**\n   * Registers a function called when the control is touched.\n   * @nodoc\n   */\n  registerOnTouched(fn: () => any): void {\n    this.onTouched = fn;\n  }\n\n  /**\n   * Sets the \"disabled\" property on the select input element.\n   * @nodoc\n   */\n  setDisabledState(isDisabled: boolean): void {\n    this._renderer.setProperty(this._elementRef.nativeElement, 'disabled', isDisabled);\n  }\n\n  /** @internal */\n  _registerOption(value: ɵNgSelectMultipleOption): string {\n    const id: string = (this._idCounter++).toString();\n    this._optionMap.set(id, value);\n    return id;\n  }\n\n  /** @internal */\n  _getOptionId(value: any): string|null {\n    for (const id of Array.from(this._optionMap.keys())) {\n      if (this._compareWith(this._optionMap.get(id)!._value, value)) return id;\n    }\n    return null;\n  }\n\n  /** @internal */\n  _getOptionValue(valueString: string): any {\n    const id: string = _extractId(valueString);\n    return this._optionMap.has(id) ? this._optionMap.get(id)!._value : valueString;\n  }\n}\n\n/**\n * @description\n * Marks `<option>` as dynamic, so Angular can be notified when options change.\n *\n * @see `SelectMultipleControlValueAccessor`\n *\n * @ngModule ReactiveFormsModule\n * @ngModule FormsModule\n * @publicApi\n */\n@Directive({selector: 'option'})\nexport class ɵNgSelectMultipleOption implements OnDestroy {\n  // TODO(issue/24571): remove '!'.\n  id!: string;\n  /** @internal */\n  _value: any;\n\n  constructor(\n      private _element: ElementRef, private _renderer: Renderer2,\n      @Optional() @Host() private _select: SelectMultipleControlValueAccessor) {\n    if (this._select) {\n      this.id = this._select._registerOption(this);\n    }\n  }\n\n  /**\n   * @description\n   * Tracks the value bound to the option element. Unlike the value binding,\n   * ngValue supports binding to objects.\n   */\n  @Input('ngValue')\n  set ngValue(value: any) {\n    if (this._select == null) return;\n    this._value = value;\n    this._setElementValue(_buildValueString(this.id, value));\n    this._select.writeValue(this._select.value);\n  }\n\n  /**\n   * @description\n   * Tracks simple string values bound to the option element.\n   * For objects, use the `ngValue` input binding.\n   */\n  @Input('value')\n  set value(value: any) {\n    if (this._select) {\n      this._value = value;\n      this._setElementValue(_buildValueString(this.id, value));\n      this._select.writeValue(this._select.value);\n    } else {\n      this._setElementValue(value);\n    }\n  }\n\n  /** @internal */\n  _setElementValue(value: string): void {\n    this._renderer.setProperty(this._element.nativeElement, 'value', value);\n  }\n\n  /** @internal */\n  _setSelected(selected: boolean) {\n    this._renderer.setProperty(this._element.nativeElement, 'selected', selected);\n  }\n\n  /** @nodoc */\n  ngOnDestroy(): void {\n    if (this._select) {\n      this._select._optionMap.delete(this.id);\n      this._select.writeValue(this._select.value);\n    }\n  }\n}\n\nexport {ɵNgSelectMultipleOption as NgSelectMultipleOption};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {isDevMode} from '@angular/core';\n\nimport {FormArray, FormControl, FormGroup} from '../model';\nimport {normalizeValidators, Validators} from '../validators';\n\nimport {AbstractControlDirective} from './abstract_control_directive';\nimport {AbstractFormGroupDirective} from './abstract_form_group_directive';\nimport {CheckboxControlValueAccessor} from './checkbox_value_accessor';\nimport {ControlContainer} from './control_container';\nimport {ControlValueAccessor} from './control_value_accessor';\nimport {DefaultValueAccessor} from './default_value_accessor';\nimport {NgControl} from './ng_control';\nimport {NumberValueAccessor} from './number_value_accessor';\nimport {RadioControlValueAccessor} from './radio_control_value_accessor';\nimport {RangeValueAccessor} from './range_value_accessor';\nimport {FormArrayName} from './reactive_directives/form_group_name';\nimport {ReactiveErrors} from './reactive_errors';\nimport {SelectControlValueAccessor} from './select_control_value_accessor';\nimport {SelectMultipleControlValueAccessor} from './select_multiple_control_value_accessor';\nimport {AsyncValidator, AsyncValidatorFn, Validator, ValidatorFn} from './validators';\n\n\nexport function controlPath(name: string|null, parent: ControlContainer): string[] {\n  return [...parent.path!, name!];\n}\n\nexport function setUpControl(control: FormControl, dir: NgControl): void {\n  if (typeof ngDevMode === 'undefined' || ngDevMode) {\n    if (!control) _throwError(dir, 'Cannot find control with');\n    if (!dir.valueAccessor) _throwError(dir, 'No value accessor for form control with');\n  }\n\n  control.validator = Validators.compose([control.validator!, dir.validator]);\n  control.asyncValidator = Validators.composeAsync([control.asyncValidator!, dir.asyncValidator]);\n  dir.valueAccessor!.writeValue(control.value);\n\n  setUpViewChangePipeline(control, dir);\n  setUpModelChangePipeline(control, dir);\n\n  setUpBlurPipeline(control, dir);\n\n  if (dir.valueAccessor!.setDisabledState) {\n    control.registerOnDisabledChange((isDisabled: boolean) => {\n      dir.valueAccessor!.setDisabledState!(isDisabled);\n    });\n  }\n\n  // re-run validation when validator binding changes, e.g. minlength=3 -> minlength=4\n  dir._rawValidators.forEach((validator: Validator|ValidatorFn) => {\n    if ((<Validator>validator).registerOnValidatorChange)\n      (<Validator>validator).registerOnValidatorChange!(() => control.updateValueAndValidity());\n  });\n\n  dir._rawAsyncValidators.forEach((validator: AsyncValidator|AsyncValidatorFn) => {\n    if ((<Validator>validator).registerOnValidatorChange)\n      (<Validator>validator).registerOnValidatorChange!(() => control.updateValueAndValidity());\n  });\n}\n\nexport function cleanUpControl(control: FormControl, dir: NgControl) {\n  const noop = () => {\n    if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      _noControlError(dir);\n    }\n  };\n\n  dir.valueAccessor!.registerOnChange(noop);\n  dir.valueAccessor!.registerOnTouched(noop);\n\n  dir._rawValidators.forEach((validator: any) => {\n    if (validator.registerOnValidatorChange) {\n      validator.registerOnValidatorChange(null);\n    }\n  });\n\n  dir._rawAsyncValidators.forEach((validator: any) => {\n    if (validator.registerOnValidatorChange) {\n      validator.registerOnValidatorChange(null);\n    }\n  });\n\n  if (control) control._clearChangeFns();\n}\n\nfunction setUpViewChangePipeline(control: FormControl, dir: NgControl): void {\n  dir.valueAccessor!.registerOnChange((newValue: any) => {\n    control._pendingValue = newValue;\n    control._pendingChange = true;\n    control._pendingDirty = true;\n\n    if (control.updateOn === 'change') updateControl(control, dir);\n  });\n}\n\nfunction setUpBlurPipeline(control: FormControl, dir: NgControl): void {\n  dir.valueAccessor!.registerOnTouched(() => {\n    control._pendingTouched = true;\n\n    if (control.updateOn === 'blur' && control._pendingChange) updateControl(control, dir);\n    if (control.updateOn !== 'submit') control.markAsTouched();\n  });\n}\n\nfunction updateControl(control: FormControl, dir: NgControl): void {\n  if (control._pendingDirty) control.markAsDirty();\n  control.setValue(control._pendingValue, {emitModelToViewChange: false});\n  dir.viewToModelUpdate(control._pendingValue);\n  control._pendingChange = false;\n}\n\nfunction setUpModelChangePipeline(control: FormControl, dir: NgControl): void {\n  control.registerOnChange((newValue: any, emitModelEvent: boolean) => {\n    // control -> view\n    dir.valueAccessor!.writeValue(newValue);\n\n    // control -> ngModel\n    if (emitModelEvent) dir.viewToModelUpdate(newValue);\n  });\n}\n\nexport function setUpFormContainer(\n    control: FormGroup|FormArray, dir: AbstractFormGroupDirective|FormArrayName) {\n  if (control == null && (typeof ngDevMode === 'undefined' || ngDevMode))\n    _throwError(dir, 'Cannot find control with');\n  control.validator = Validators.compose([control.validator, dir.validator]);\n  control.asyncValidator = Validators.composeAsync([control.asyncValidator, dir.asyncValidator]);\n}\n\nfunction _noControlError(dir: NgControl) {\n  return _throwError(dir, 'There is no FormControl instance attached to form control element with');\n}\n\nfunction _throwError(dir: AbstractControlDirective, message: string): void {\n  let messageEnd: string;\n  if (dir.path!.length > 1) {\n    messageEnd = `path: '${dir.path!.join(' -> ')}'`;\n  } else if (dir.path![0]) {\n    messageEnd = `name: '${dir.path}'`;\n  } else {\n    messageEnd = 'unspecified name attribute';\n  }\n  throw new Error(`${message} ${messageEnd}`);\n}\n\nexport function composeValidators(validators: Array<Validator|ValidatorFn>): ValidatorFn|null {\n  return validators != null ? Validators.compose(normalizeValidators<ValidatorFn>(validators)) :\n                              null;\n}\n\nexport function composeAsyncValidators(validators: Array<AsyncValidator|AsyncValidatorFn>):\n    AsyncValidatorFn|null {\n  return validators != null ?\n      Validators.composeAsync(normalizeValidators<AsyncValidatorFn>(validators)) :\n      null;\n}\n\nexport function isPropertyUpdated(changes: {[key: string]: any}, viewModel: any): boolean {\n  if (!changes.hasOwnProperty('model')) return false;\n  const change = changes['model'];\n\n  if (change.isFirstChange()) return true;\n  return !Object.is(viewModel, change.currentValue);\n}\n\nconst BUILTIN_ACCESSORS = [\n  CheckboxControlValueAccessor,\n  RangeValueAccessor,\n  NumberValueAccessor,\n  SelectControlValueAccessor,\n  SelectMultipleControlValueAccessor,\n  RadioControlValueAccessor,\n];\n\nexport function isBuiltInAccessor(valueAccessor: ControlValueAccessor): boolean {\n  return BUILTIN_ACCESSORS.some(a => valueAccessor.constructor === a);\n}\n\nexport function syncPendingControls(form: FormGroup, directives: NgControl[]): void {\n  form._syncPendingControls();\n  directives.forEach(dir => {\n    const control = dir.control as FormControl;\n    if (control.updateOn === 'submit' && control._pendingChange) {\n      dir.viewToModelUpdate(control._pendingValue);\n      control._pendingChange = false;\n    }\n  });\n}\n\n// TODO: vsavkin remove it once https://github.com/angular/angular/issues/3011 is implemented\nexport function selectValueAccessor(\n    dir: NgControl, valueAccessors: ControlValueAccessor[]): ControlValueAccessor|null {\n  if (!valueAccessors) return null;\n\n  if (!Array.isArray(valueAccessors) && (typeof ngDevMode === 'undefined' || ngDevMode))\n    _throwError(dir, 'Value accessor was not provided as an array for form control with');\n\n  let defaultAccessor: ControlValueAccessor|undefined = undefined;\n  let builtinAccessor: ControlValueAccessor|undefined = undefined;\n  let customAccessor: ControlValueAccessor|undefined = undefined;\n\n  valueAccessors.forEach((v: ControlValueAccessor) => {\n    if (v.constructor === DefaultValueAccessor) {\n      defaultAccessor = v;\n\n    } else if (isBuiltInAccessor(v)) {\n      if (builtinAccessor && (typeof ngDevMode === 'undefined' || ngDevMode))\n        _throwError(dir, 'More than one built-in value accessor matches form control with');\n      builtinAccessor = v;\n\n    } else {\n      if (customAccessor && (typeof ngDevMode === 'undefined' || ngDevMode))\n        _throwError(dir, 'More than one custom value accessor matches form control with');\n      customAccessor = v;\n    }\n  });\n\n  if (customAccessor) return customAccessor;\n  if (builtinAccessor) return builtinAccessor;\n  if (defaultAccessor) return defaultAccessor;\n\n  if (typeof ngDevMode === 'undefined' || ngDevMode) {\n    _throwError(dir, 'No valid value accessor for form control with');\n  }\n  return null;\n}\n\nexport function removeDir<T>(list: T[], el: T): void {\n  const index = list.indexOf(el);\n  if (index > -1) list.splice(index, 1);\n}\n\n// TODO(kara): remove after deprecation period\nexport function _ngModelWarning(\n    name: string, type: {_ngModelWarningSentOnce: boolean},\n    instance: {_ngModelWarningSent: boolean}, warningConfig: string|null) {\n  if (!isDevMode() || warningConfig === 'never') return;\n\n  if (((warningConfig === null || warningConfig === 'once') && !type._ngModelWarningSentOnce) ||\n      (warningConfig === 'always' && !instance._ngModelWarningSent)) {\n    if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      ReactiveErrors.ngModelWarning(name);\n    }\n    type._ngModelWarningSentOnce = true;\n    instance._ngModelWarningSent = true;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {EventEmitter} from '@angular/core';\nimport {Observable} from 'rxjs';\nimport {composeAsyncValidators, composeValidators} from './directives/shared';\nimport {AsyncValidatorFn, ValidationErrors, ValidatorFn} from './directives/validators';\nimport {toObservable} from './validators';\n\n/**\n * Reports that a FormControl is valid, meaning that no errors exist in the input value.\n *\n * @see `status`\n */\nexport const VALID = 'VALID';\n\n/**\n * Reports that a FormControl is invalid, meaning that an error exists in the input value.\n *\n * @see `status`\n */\nexport const INVALID = 'INVALID';\n\n/**\n * Reports that a FormControl is pending, meaning that that async validation is occurring and\n * errors are not yet available for the input value.\n *\n * @see `markAsPending`\n * @see `status`\n */\nexport const PENDING = 'PENDING';\n\n/**\n * Reports that a FormControl is disabled, meaning that the control is exempt from ancestor\n * calculations of validity or value.\n *\n * @see `markAsDisabled`\n * @see `status`\n */\nexport const DISABLED = 'DISABLED';\n\nfunction _find(control: AbstractControl, path: Array<string|number>|string, delimiter: string) {\n  if (path == null) return null;\n\n  if (!Array.isArray(path)) {\n    path = path.split(delimiter);\n  }\n  if (Array.isArray(path) && path.length === 0) return null;\n\n  // Not using Array.reduce here due to a Chrome 80 bug\n  // https://bugs.chromium.org/p/chromium/issues/detail?id=1049982\n  let controlToFind: AbstractControl|null = control;\n  path.forEach((name: string|number) => {\n    if (controlToFind instanceof FormGroup) {\n      controlToFind = controlToFind.controls.hasOwnProperty(name as string) ?\n          controlToFind.controls[name] :\n          null;\n    } else if (controlToFind instanceof FormArray) {\n      controlToFind = controlToFind.at(<number>name) || null;\n    } else {\n      controlToFind = null;\n    }\n  });\n  return controlToFind;\n}\n\n/**\n * Gets validators from either an options object or given validators.\n */\nfunction pickValidators(validatorOrOpts?: ValidatorFn|ValidatorFn[]|AbstractControlOptions|\n                        null): ValidatorFn|ValidatorFn[]|null {\n  return (isOptionsObj(validatorOrOpts) ? validatorOrOpts.validators : validatorOrOpts) || null;\n}\n\n/**\n * Creates validator function by combining provided validators.\n */\nfunction coerceToValidator(validator: ValidatorFn|ValidatorFn[]|null): ValidatorFn|null {\n  return Array.isArray(validator) ? composeValidators(validator) : validator || null;\n}\n\n/**\n * Gets async validators from either an options object or given validators.\n */\nfunction pickAsyncValidators(\n    asyncValidator?: AsyncValidatorFn|AsyncValidatorFn[]|null,\n    validatorOrOpts?: ValidatorFn|ValidatorFn[]|AbstractControlOptions|null): AsyncValidatorFn|\n    AsyncValidatorFn[]|null {\n  return (isOptionsObj(validatorOrOpts) ? validatorOrOpts.asyncValidators : asyncValidator) || null;\n}\n\n/**\n * Creates async validator function by combining provided async validators.\n */\nfunction coerceToAsyncValidator(asyncValidator?: AsyncValidatorFn|AsyncValidatorFn[]|\n                                null): AsyncValidatorFn|null {\n  return Array.isArray(asyncValidator) ? composeAsyncValidators(asyncValidator) :\n                                         asyncValidator || null;\n}\n\nexport type FormHooks = 'change'|'blur'|'submit';\n\n/**\n * Interface for options provided to an `AbstractControl`.\n *\n * @publicApi\n */\nexport interface AbstractControlOptions {\n  /**\n   * @description\n   * The list of validators applied to a control.\n   */\n  validators?: ValidatorFn|ValidatorFn[]|null;\n  /**\n   * @description\n   * The list of async validators applied to control.\n   */\n  asyncValidators?: AsyncValidatorFn|AsyncValidatorFn[]|null;\n  /**\n   * @description\n   * The event name for control to update upon.\n   */\n  updateOn?: 'change'|'blur'|'submit';\n}\n\n\nfunction isOptionsObj(validatorOrOpts?: ValidatorFn|ValidatorFn[]|AbstractControlOptions|\n                      null): validatorOrOpts is AbstractControlOptions {\n  return validatorOrOpts != null && !Array.isArray(validatorOrOpts) &&\n      typeof validatorOrOpts === 'object';\n}\n\n\n/**\n * This is the base class for `FormControl`, `FormGroup`, and `FormArray`.\n *\n * It provides some of the shared behavior that all controls and groups of controls have, like\n * running validators, calculating status, and resetting state. It also defines the properties\n * that are shared between all sub-classes, like `value`, `valid`, and `dirty`. It shouldn't be\n * instantiated directly.\n *\n * @see [Forms Guide](/guide/forms)\n * @see [Reactive Forms Guide](/guide/reactive-forms)\n * @see [Dynamic Forms Guide](/guide/dynamic-form)\n *\n * @publicApi\n */\nexport abstract class AbstractControl {\n  /** @internal */\n  // TODO(issue/24571): remove '!'.\n  _pendingDirty!: boolean;\n\n  /**\n   * Indicates that a control has its own pending asynchronous validation in progress.\n   *\n   * @internal\n   */\n  _hasOwnPendingAsyncValidator = false;\n\n  /** @internal */\n  // TODO(issue/24571): remove '!'.\n  _pendingTouched!: boolean;\n\n  /** @internal */\n  _onCollectionChange = () => {};\n\n  /** @internal */\n  // TODO(issue/24571): remove '!'.\n  _updateOn!: FormHooks;\n\n  // TODO(issue/24571): remove '!'.\n  private _parent!: FormGroup|FormArray;\n  private _asyncValidationSubscription: any;\n\n  /**\n   * Contains the result of merging synchronous validators into a single validator function\n   * (combined using `Validators.compose`).\n   *\n   * @internal\n   */\n  private _composedValidatorFn: ValidatorFn|null;\n\n  /**\n   * Contains the result of merging asynchronous validators into a single validator function\n   * (combined using `Validators.composeAsync`).\n   *\n   * @internal\n   */\n  private _composedAsyncValidatorFn: AsyncValidatorFn|null;\n\n  /**\n   * Synchronous validators as they were provided:\n   *  - in `AbstractControl` constructor\n   *  - as an argument while calling `setValidators` function\n   *  - while calling the setter on the `validator` field (e.g. `control.validator = validatorFn`)\n   *\n   * @internal\n   */\n  private _rawValidators: ValidatorFn|ValidatorFn[]|null;\n\n  /**\n   * Asynchronous validators as they were provided:\n   *  - in `AbstractControl` constructor\n   *  - as an argument while calling `setAsyncValidators` function\n   *  - while calling the setter on the `asyncValidator` field (e.g. `control.asyncValidator =\n   * asyncValidatorFn`)\n   *\n   * @internal\n   */\n  private _rawAsyncValidators: AsyncValidatorFn|AsyncValidatorFn[]|null;\n\n  /**\n   * The current value of the control.\n   *\n   * * For a `FormControl`, the current value.\n   * * For an enabled `FormGroup`, the values of enabled controls as an object\n   * with a key-value pair for each member of the group.\n   * * For a disabled `FormGroup`, the values of all controls as an object\n   * with a key-value pair for each member of the group.\n   * * For a `FormArray`, the values of enabled controls as an array.\n   *\n   */\n  public readonly value: any;\n\n  /**\n   * Initialize the AbstractControl instance.\n   *\n   * @param validators The function or array of functions that is used to determine the validity of\n   *     this control synchronously.\n   * @param asyncValidators The function or array of functions that is used to determine validity of\n   *     this control asynchronously.\n   */\n  constructor(\n      validators: ValidatorFn|ValidatorFn[]|null,\n      asyncValidators: AsyncValidatorFn|AsyncValidatorFn[]|null) {\n    this._rawValidators = validators;\n    this._rawAsyncValidators = asyncValidators;\n    this._composedValidatorFn = coerceToValidator(this._rawValidators);\n    this._composedAsyncValidatorFn = coerceToAsyncValidator(this._rawAsyncValidators);\n  }\n\n  /**\n   * The function that is used to determine the validity of this control synchronously.\n   */\n  get validator(): ValidatorFn|null {\n    return this._composedValidatorFn;\n  }\n  set validator(validatorFn: ValidatorFn|null) {\n    this._rawValidators = this._composedValidatorFn = validatorFn;\n  }\n\n  /**\n   * The function that is used to determine the validity of this control asynchronously.\n   */\n  get asyncValidator(): AsyncValidatorFn|null {\n    return this._composedAsyncValidatorFn;\n  }\n  set asyncValidator(asyncValidatorFn: AsyncValidatorFn|null) {\n    this._rawAsyncValidators = this._composedAsyncValidatorFn = asyncValidatorFn;\n  }\n\n  /**\n   * The parent control.\n   */\n  get parent(): FormGroup|FormArray {\n    return this._parent;\n  }\n\n  /**\n   * The validation status of the control. There are four possible\n   * validation status values:\n   *\n   * * **VALID**: This control has passed all validation checks.\n   * * **INVALID**: This control has failed at least one validation check.\n   * * **PENDING**: This control is in the midst of conducting a validation check.\n   * * **DISABLED**: This control is exempt from validation checks.\n   *\n   * These status values are mutually exclusive, so a control cannot be\n   * both valid AND invalid or invalid AND disabled.\n   */\n  // TODO(issue/24571): remove '!'.\n  public readonly status!: string;\n\n  /**\n   * A control is `valid` when its `status` is `VALID`.\n   *\n   * @see {@link AbstractControl.status}\n   *\n   * @returns True if the control has passed all of its validation tests,\n   * false otherwise.\n   */\n  get valid(): boolean {\n    return this.status === VALID;\n  }\n\n  /**\n   * A control is `invalid` when its `status` is `INVALID`.\n   *\n   * @see {@link AbstractControl.status}\n   *\n   * @returns True if this control has failed one or more of its validation checks,\n   * false otherwise.\n   */\n  get invalid(): boolean {\n    return this.status === INVALID;\n  }\n\n  /**\n   * A control is `pending` when its `status` is `PENDING`.\n   *\n   * @see {@link AbstractControl.status}\n   *\n   * @returns True if this control is in the process of conducting a validation check,\n   * false otherwise.\n   */\n  get pending(): boolean {\n    return this.status == PENDING;\n  }\n\n  /**\n   * A control is `disabled` when its `status` is `DISABLED`.\n   *\n   * Disabled controls are exempt from validation checks and\n   * are not included in the aggregate value of their ancestor\n   * controls.\n   *\n   * @see {@link AbstractControl.status}\n   *\n   * @returns True if the control is disabled, false otherwise.\n   */\n  get disabled(): boolean {\n    return this.status === DISABLED;\n  }\n\n  /**\n   * A control is `enabled` as long as its `status` is not `DISABLED`.\n   *\n   * @returns True if the control has any status other than 'DISABLED',\n   * false if the status is 'DISABLED'.\n   *\n   * @see {@link AbstractControl.status}\n   *\n   */\n  get enabled(): boolean {\n    return this.status !== DISABLED;\n  }\n\n  /**\n   * An object containing any errors generated by failing validation,\n   * or null if there are no errors.\n   */\n  // TODO(issue/24571): remove '!'.\n  public readonly errors!: ValidationErrors|null;\n\n  /**\n   * A control is `pristine` if the user has not yet changed\n   * the value in the UI.\n   *\n   * @returns True if the user has not yet changed the value in the UI; compare `dirty`.\n   * Programmatic changes to a control's value do not mark it dirty.\n   */\n  public readonly pristine: boolean = true;\n\n  /**\n   * A control is `dirty` if the user has changed the value\n   * in the UI.\n   *\n   * @returns True if the user has changed the value of this control in the UI; compare `pristine`.\n   * Programmatic changes to a control's value do not mark it dirty.\n   */\n  get dirty(): boolean {\n    return !this.pristine;\n  }\n\n  /**\n   * True if the control is marked as `touched`.\n   *\n   * A control is marked `touched` once the user has triggered\n   * a `blur` event on it.\n   */\n  public readonly touched: boolean = false;\n\n  /**\n   * True if the control has not been marked as touched\n   *\n   * A control is `untouched` if the user has not yet triggered\n   * a `blur` event on it.\n   */\n  get untouched(): boolean {\n    return !this.touched;\n  }\n\n  /**\n   * A multicasting observable that emits an event every time the value of the control changes, in\n   * the UI or programmatically. It also emits an event each time you call enable() or disable()\n   * without passing along {emitEvent: false} as a function argument.\n   */\n  // TODO(issue/24571): remove '!'.\n  public readonly valueChanges!: Observable<any>;\n\n  /**\n   * A multicasting observable that emits an event every time the validation `status` of the control\n   * recalculates.\n   *\n   * @see {@link AbstractControl.status}\n   *\n   */\n  // TODO(issue/24571): remove '!'.\n  public readonly statusChanges!: Observable<any>;\n\n  /**\n   * Reports the update strategy of the `AbstractControl` (meaning\n   * the event on which the control updates itself).\n   * Possible values: `'change'` | `'blur'` | `'submit'`\n   * Default value: `'change'`\n   */\n  get updateOn(): FormHooks {\n    return this._updateOn ? this._updateOn : (this.parent ? this.parent.updateOn : 'change');\n  }\n\n  /**\n   * Sets the synchronous validators that are active on this control.  Calling\n   * this overwrites any existing sync validators.\n   *\n   * When you add or remove a validator at run time, you must call\n   * `updateValueAndValidity()` for the new validation to take effect.\n   *\n   */\n  setValidators(newValidator: ValidatorFn|ValidatorFn[]|null): void {\n    this._rawValidators = newValidator;\n    this._composedValidatorFn = coerceToValidator(newValidator);\n  }\n\n  /**\n   * Sets the async validators that are active on this control. Calling this\n   * overwrites any existing async validators.\n   *\n   * When you add or remove a validator at run time, you must call\n   * `updateValueAndValidity()` for the new validation to take effect.\n   *\n   */\n  setAsyncValidators(newValidator: AsyncValidatorFn|AsyncValidatorFn[]|null): void {\n    this._rawAsyncValidators = newValidator;\n    this._composedAsyncValidatorFn = coerceToAsyncValidator(newValidator);\n  }\n\n  /**\n   * Empties out the sync validator list.\n   *\n   * When you add or remove a validator at run time, you must call\n   * `updateValueAndValidity()` for the new validation to take effect.\n   *\n   */\n  clearValidators(): void {\n    this.validator = null;\n  }\n\n  /**\n   * Empties out the async validator list.\n   *\n   * When you add or remove a validator at run time, you must call\n   * `updateValueAndValidity()` for the new validation to take effect.\n   *\n   */\n  clearAsyncValidators(): void {\n    this.asyncValidator = null;\n  }\n\n  /**\n   * Marks the control as `touched`. A control is touched by focus and\n   * blur events that do not change the value.\n   *\n   * @see `markAsUntouched()`\n   * @see `markAsDirty()`\n   * @see `markAsPristine()`\n   *\n   * @param opts Configuration options that determine how the control propagates changes\n   * and emits events after marking is applied.\n   * * `onlySelf`: When true, mark only this control. When false or not supplied,\n   * marks all direct ancestors. Default is false.\n   */\n  markAsTouched(opts: {onlySelf?: boolean} = {}): void {\n    (this as {touched: boolean}).touched = true;\n\n    if (this._parent && !opts.onlySelf) {\n      this._parent.markAsTouched(opts);\n    }\n  }\n\n  /**\n   * Marks the control and all its descendant controls as `touched`.\n   * @see `markAsTouched()`\n   */\n  markAllAsTouched(): void {\n    this.markAsTouched({onlySelf: true});\n\n    this._forEachChild((control: AbstractControl) => control.markAllAsTouched());\n  }\n\n  /**\n   * Marks the control as `untouched`.\n   *\n   * If the control has any children, also marks all children as `untouched`\n   * and recalculates the `touched` status of all parent controls.\n   *\n   * @see `markAsTouched()`\n   * @see `markAsDirty()`\n   * @see `markAsPristine()`\n   *\n   * @param opts Configuration options that determine how the control propagates changes\n   * and emits events after the marking is applied.\n   * * `onlySelf`: When true, mark only this control. When false or not supplied,\n   * marks all direct ancestors. Default is false.\n   */\n  markAsUntouched(opts: {onlySelf?: boolean} = {}): void {\n    (this as {touched: boolean}).touched = false;\n    this._pendingTouched = false;\n\n    this._forEachChild((control: AbstractControl) => {\n      control.markAsUntouched({onlySelf: true});\n    });\n\n    if (this._parent && !opts.onlySelf) {\n      this._parent._updateTouched(opts);\n    }\n  }\n\n  /**\n   * Marks the control as `dirty`. A control becomes dirty when\n   * the control's value is changed through the UI; compare `markAsTouched`.\n   *\n   * @see `markAsTouched()`\n   * @see `markAsUntouched()`\n   * @see `markAsPristine()`\n   *\n   * @param opts Configuration options that determine how the control propagates changes\n   * and emits events after marking is applied.\n   * * `onlySelf`: When true, mark only this control. When false or not supplied,\n   * marks all direct ancestors. Default is false.\n   */\n  markAsDirty(opts: {onlySelf?: boolean} = {}): void {\n    (this as {pristine: boolean}).pristine = false;\n\n    if (this._parent && !opts.onlySelf) {\n      this._parent.markAsDirty(opts);\n    }\n  }\n\n  /**\n   * Marks the control as `pristine`.\n   *\n   * If the control has any children, marks all children as `pristine`,\n   * and recalculates the `pristine` status of all parent\n   * controls.\n   *\n   * @see `markAsTouched()`\n   * @see `markAsUntouched()`\n   * @see `markAsDirty()`\n   *\n   * @param opts Configuration options that determine how the control emits events after\n   * marking is applied.\n   * * `onlySelf`: When true, mark only this control. When false or not supplied,\n   * marks all direct ancestors. Default is false.\n   */\n  markAsPristine(opts: {onlySelf?: boolean} = {}): void {\n    (this as {pristine: boolean}).pristine = true;\n    this._pendingDirty = false;\n\n    this._forEachChild((control: AbstractControl) => {\n      control.markAsPristine({onlySelf: true});\n    });\n\n    if (this._parent && !opts.onlySelf) {\n      this._parent._updatePristine(opts);\n    }\n  }\n\n  /**\n   * Marks the control as `pending`.\n   *\n   * A control is pending while the control performs async validation.\n   *\n   * @see {@link AbstractControl.status}\n   *\n   * @param opts Configuration options that determine how the control propagates changes and\n   * emits events after marking is applied.\n   * * `onlySelf`: When true, mark only this control. When false or not supplied,\n   * marks all direct ancestors. Default is false.\n   * * `emitEvent`: When true or not supplied (the default), the `statusChanges`\n   * observable emits an event with the latest status the control is marked pending.\n   * When false, no events are emitted.\n   *\n   */\n  markAsPending(opts: {onlySelf?: boolean, emitEvent?: boolean} = {}): void {\n    (this as {status: string}).status = PENDING;\n\n    if (opts.emitEvent !== false) {\n      (this.statusChanges as EventEmitter<any>).emit(this.status);\n    }\n\n    if (this._parent && !opts.onlySelf) {\n      this._parent.markAsPending(opts);\n    }\n  }\n\n  /**\n   * Disables the control. This means the control is exempt from validation checks and\n   * excluded from the aggregate value of any parent. Its status is `DISABLED`.\n   *\n   * If the control has children, all children are also disabled.\n   *\n   * @see {@link AbstractControl.status}\n   *\n   * @param opts Configuration options that determine how the control propagates\n   * changes and emits events after the control is disabled.\n   * * `onlySelf`: When true, mark only this control. When false or not supplied,\n   * marks all direct ancestors. Default is false.\n   * * `emitEvent`: When true or not supplied (the default), both the `statusChanges` and\n   * `valueChanges`\n   * observables emit events with the latest status and value when the control is disabled.\n   * When false, no events are emitted.\n   */\n  disable(opts: {onlySelf?: boolean, emitEvent?: boolean} = {}): void {\n    // If parent has been marked artificially dirty we don't want to re-calculate the\n    // parent's dirtiness based on the children.\n    const skipPristineCheck = this._parentMarkedDirty(opts.onlySelf);\n\n    (this as {status: string}).status = DISABLED;\n    (this as {errors: ValidationErrors | null}).errors = null;\n    this._forEachChild((control: AbstractControl) => {\n      control.disable({...opts, onlySelf: true});\n    });\n    this._updateValue();\n\n    if (opts.emitEvent !== false) {\n      (this.valueChanges as EventEmitter<any>).emit(this.value);\n      (this.statusChanges as EventEmitter<string>).emit(this.status);\n    }\n\n    this._updateAncestors({...opts, skipPristineCheck});\n    this._onDisabledChange.forEach((changeFn) => changeFn(true));\n  }\n\n  /**\n   * Enables the control. This means the control is included in validation checks and\n   * the aggregate value of its parent. Its status recalculates based on its value and\n   * its validators.\n   *\n   * By default, if the control has children, all children are enabled.\n   *\n   * @see {@link AbstractControl.status}\n   *\n   * @param opts Configure options that control how the control propagates changes and\n   * emits events when marked as untouched\n   * * `onlySelf`: When true, mark only this control. When false or not supplied,\n   * marks all direct ancestors. Default is false.\n   * * `emitEvent`: When true or not supplied (the default), both the `statusChanges` and\n   * `valueChanges`\n   * observables emit events with the latest status and value when the control is enabled.\n   * When false, no events are emitted.\n   */\n  enable(opts: {onlySelf?: boolean, emitEvent?: boolean} = {}): void {\n    // If parent has been marked artificially dirty we don't want to re-calculate the\n    // parent's dirtiness based on the children.\n    const skipPristineCheck = this._parentMarkedDirty(opts.onlySelf);\n\n    (this as {status: string}).status = VALID;\n    this._forEachChild((control: AbstractControl) => {\n      control.enable({...opts, onlySelf: true});\n    });\n    this.updateValueAndValidity({onlySelf: true, emitEvent: opts.emitEvent});\n\n    this._updateAncestors({...opts, skipPristineCheck});\n    this._onDisabledChange.forEach((changeFn) => changeFn(false));\n  }\n\n  private _updateAncestors(\n      opts: {onlySelf?: boolean, emitEvent?: boolean, skipPristineCheck?: boolean}) {\n    if (this._parent && !opts.onlySelf) {\n      this._parent.updateValueAndValidity(opts);\n      if (!opts.skipPristineCheck) {\n        this._parent._updatePristine();\n      }\n      this._parent._updateTouched();\n    }\n  }\n\n  /**\n   * @param parent Sets the parent of the control\n   */\n  setParent(parent: FormGroup|FormArray): void {\n    this._parent = parent;\n  }\n\n  /**\n   * Sets the value of the control. Abstract method (implemented in sub-classes).\n   */\n  abstract setValue(value: any, options?: Object): void;\n\n  /**\n   * Patches the value of the control. Abstract method (implemented in sub-classes).\n   */\n  abstract patchValue(value: any, options?: Object): void;\n\n  /**\n   * Resets the control. Abstract method (implemented in sub-classes).\n   */\n  abstract reset(value?: any, options?: Object): void;\n\n  /**\n   * Recalculates the value and validation status of the control.\n   *\n   * By default, it also updates the value and validity of its ancestors.\n   *\n   * @param opts Configuration options determine how the control propagates changes and emits events\n   * after updates and validity checks are applied.\n   * * `onlySelf`: When true, only update this control. When false or not supplied,\n   * update all direct ancestors. Default is false.\n   * * `emitEvent`: When true or not supplied (the default), both the `statusChanges` and\n   * `valueChanges`\n   * observables emit events with the latest status and value when the control is updated.\n   * When false, no events are emitted.\n   */\n  updateValueAndValidity(opts: {onlySelf?: boolean, emitEvent?: boolean} = {}): void {\n    this._setInitialStatus();\n    this._updateValue();\n\n    if (this.enabled) {\n      this._cancelExistingSubscription();\n      (this as {errors: ValidationErrors | null}).errors = this._runValidator();\n      (this as {status: string}).status = this._calculateStatus();\n\n      if (this.status === VALID || this.status === PENDING) {\n        this._runAsyncValidator(opts.emitEvent);\n      }\n    }\n\n    if (opts.emitEvent !== false) {\n      (this.valueChanges as EventEmitter<any>).emit(this.value);\n      (this.statusChanges as EventEmitter<string>).emit(this.status);\n    }\n\n    if (this._parent && !opts.onlySelf) {\n      this._parent.updateValueAndValidity(opts);\n    }\n  }\n\n  /** @internal */\n  _updateTreeValidity(opts: {emitEvent?: boolean} = {emitEvent: true}) {\n    this._forEachChild((ctrl: AbstractControl) => ctrl._updateTreeValidity(opts));\n    this.updateValueAndValidity({onlySelf: true, emitEvent: opts.emitEvent});\n  }\n\n  private _setInitialStatus() {\n    (this as {status: string}).status = this._allControlsDisabled() ? DISABLED : VALID;\n  }\n\n  private _runValidator(): ValidationErrors|null {\n    return this.validator ? this.validator(this) : null;\n  }\n\n  private _runAsyncValidator(emitEvent?: boolean): void {\n    if (this.asyncValidator) {\n      (this as {status: string}).status = PENDING;\n      this._hasOwnPendingAsyncValidator = true;\n      const obs = toObservable(this.asyncValidator(this));\n      this._asyncValidationSubscription = obs.subscribe((errors: ValidationErrors|null) => {\n        this._hasOwnPendingAsyncValidator = false;\n        // This will trigger the recalculation of the validation status, which depends on\n        // the state of the asynchronous validation (whether it is in progress or not). So, it is\n        // necessary that we have updated the `_hasOwnPendingAsyncValidator` boolean flag first.\n        this.setErrors(errors, {emitEvent});\n      });\n    }\n  }\n\n  private _cancelExistingSubscription(): void {\n    if (this._asyncValidationSubscription) {\n      this._asyncValidationSubscription.unsubscribe();\n      this._hasOwnPendingAsyncValidator = false;\n    }\n  }\n\n  /**\n   * Sets errors on a form control when running validations manually, rather than automatically.\n   *\n   * Calling `setErrors` also updates the validity of the parent control.\n   *\n   * @usageNotes\n   *\n   * ### Manually set the errors for a control\n   *\n   * ```\n   * const login = new FormControl('someLogin');\n   * login.setErrors({\n   *   notUnique: true\n   * });\n   *\n   * expect(login.valid).toEqual(false);\n   * expect(login.errors).toEqual({ notUnique: true });\n   *\n   * login.setValue('someOtherLogin');\n   *\n   * expect(login.valid).toEqual(true);\n   * ```\n   */\n  setErrors(errors: ValidationErrors|null, opts: {emitEvent?: boolean} = {}): void {\n    (this as {errors: ValidationErrors | null}).errors = errors;\n    this._updateControlsErrors(opts.emitEvent !== false);\n  }\n\n  /**\n   * Retrieves a child control given the control's name or path.\n   *\n   * @param path A dot-delimited string or array of string/number values that define the path to the\n   * control.\n   *\n   * @usageNotes\n   * ### Retrieve a nested control\n   *\n   * For example, to get a `name` control nested within a `person` sub-group:\n   *\n   * * `this.form.get('person.name');`\n   *\n   * -OR-\n   *\n   * * `this.form.get(['person', 'name']);`\n   */\n  get(path: Array<string|number>|string): AbstractControl|null {\n    return _find(this, path, '.');\n  }\n\n  /**\n   * @description\n   * Reports error data for the control with the given path.\n   *\n   * @param errorCode The code of the error to check\n   * @param path A list of control names that designates how to move from the current control\n   * to the control that should be queried for errors.\n   *\n   * @usageNotes\n   * For example, for the following `FormGroup`:\n   *\n   * ```\n   * form = new FormGroup({\n   *   address: new FormGroup({ street: new FormControl() })\n   * });\n   * ```\n   *\n   * The path to the 'street' control from the root form would be 'address' -> 'street'.\n   *\n   * It can be provided to this method in one of two formats:\n   *\n   * 1. An array of string control names, e.g. `['address', 'street']`\n   * 1. A period-delimited list of control names in one string, e.g. `'address.street'`\n   *\n   * @returns error data for that particular error. If the control or error is not present,\n   * null is returned.\n   */\n  getError(errorCode: string, path?: Array<string|number>|string): any {\n    const control = path ? this.get(path) : this;\n    return control && control.errors ? control.errors[errorCode] : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control with the given path has the error specified.\n   *\n   * @param errorCode The code of the error to check\n   * @param path A list of control names that designates how to move from the current control\n   * to the control that should be queried for errors.\n   *\n   * @usageNotes\n   * For example, for the following `FormGroup`:\n   *\n   * ```\n   * form = new FormGroup({\n   *   address: new FormGroup({ street: new FormControl() })\n   * });\n   * ```\n   *\n   * The path to the 'street' control from the root form would be 'address' -> 'street'.\n   *\n   * It can be provided to this method in one of two formats:\n   *\n   * 1. An array of string control names, e.g. `['address', 'street']`\n   * 1. A period-delimited list of control names in one string, e.g. `'address.street'`\n   *\n   * If no path is given, this method checks for the error on the current control.\n   *\n   * @returns whether the given error is present in the control at the given path.\n   *\n   * If the control is not present, false is returned.\n   */\n  hasError(errorCode: string, path?: Array<string|number>|string): boolean {\n    return !!this.getError(errorCode, path);\n  }\n\n  /**\n   * Retrieves the top-level ancestor of this control.\n   */\n  get root(): AbstractControl {\n    let x: AbstractControl = this;\n\n    while (x._parent) {\n      x = x._parent;\n    }\n\n    return x;\n  }\n\n  /** @internal */\n  _updateControlsErrors(emitEvent: boolean): void {\n    (this as {status: string}).status = this._calculateStatus();\n\n    if (emitEvent) {\n      (this.statusChanges as EventEmitter<string>).emit(this.status);\n    }\n\n    if (this._parent) {\n      this._parent._updateControlsErrors(emitEvent);\n    }\n  }\n\n  /** @internal */\n  _initObservables() {\n    (this as {valueChanges: Observable<any>}).valueChanges = new EventEmitter();\n    (this as {statusChanges: Observable<any>}).statusChanges = new EventEmitter();\n  }\n\n\n  private _calculateStatus(): string {\n    if (this._allControlsDisabled()) return DISABLED;\n    if (this.errors) return INVALID;\n    if (this._hasOwnPendingAsyncValidator || this._anyControlsHaveStatus(PENDING)) return PENDING;\n    if (this._anyControlsHaveStatus(INVALID)) return INVALID;\n    return VALID;\n  }\n\n  /** @internal */\n  abstract _updateValue(): void;\n\n  /** @internal */\n  abstract _forEachChild(cb: Function): void;\n\n  /** @internal */\n  abstract _anyControls(condition: Function): boolean;\n\n  /** @internal */\n  abstract _allControlsDisabled(): boolean;\n\n  /** @internal */\n  abstract _syncPendingControls(): boolean;\n\n  /** @internal */\n  _anyControlsHaveStatus(status: string): boolean {\n    return this._anyControls((control: AbstractControl) => control.status === status);\n  }\n\n  /** @internal */\n  _anyControlsDirty(): boolean {\n    return this._anyControls((control: AbstractControl) => control.dirty);\n  }\n\n  /** @internal */\n  _anyControlsTouched(): boolean {\n    return this._anyControls((control: AbstractControl) => control.touched);\n  }\n\n  /** @internal */\n  _updatePristine(opts: {onlySelf?: boolean} = {}): void {\n    (this as {pristine: boolean}).pristine = !this._anyControlsDirty();\n\n    if (this._parent && !opts.onlySelf) {\n      this._parent._updatePristine(opts);\n    }\n  }\n\n  /** @internal */\n  _updateTouched(opts: {onlySelf?: boolean} = {}): void {\n    (this as {touched: boolean}).touched = this._anyControlsTouched();\n\n    if (this._parent && !opts.onlySelf) {\n      this._parent._updateTouched(opts);\n    }\n  }\n\n  /** @internal */\n  _onDisabledChange: Function[] = [];\n\n  /** @internal */\n  _isBoxedValue(formState: any): boolean {\n    return typeof formState === 'object' && formState !== null &&\n        Object.keys(formState).length === 2 && 'value' in formState && 'disabled' in formState;\n  }\n\n  /** @internal */\n  _registerOnCollectionChange(fn: () => void): void {\n    this._onCollectionChange = fn;\n  }\n\n  /** @internal */\n  _setUpdateStrategy(opts?: ValidatorFn|ValidatorFn[]|AbstractControlOptions|null): void {\n    if (isOptionsObj(opts) && opts.updateOn != null) {\n      this._updateOn = opts.updateOn!;\n    }\n  }\n\n  /**\n   * Check to see if parent has been marked artificially dirty.\n   *\n   * @internal\n   */\n  private _parentMarkedDirty(onlySelf?: boolean): boolean {\n    const parentDirty = this._parent && this._parent.dirty;\n    return !onlySelf && parentDirty && !this._parent._anyControlsDirty();\n  }\n}\n\n/**\n * Tracks the value and validation status of an individual form control.\n *\n * This is one of the three fundamental building blocks of Angular forms, along with\n * `FormGroup` and `FormArray`. It extends the `AbstractControl` class that\n * implements most of the base functionality for accessing the value, validation status,\n * user interactions and events. See [usage examples below](#usage-notes).\n *\n * @see `AbstractControl`\n * @see [Reactive Forms Guide](guide/reactive-forms)\n * @see [Usage Notes](#usage-notes)\n *\n * @usageNotes\n *\n * ### Initializing Form Controls\n *\n * Instantiate a `FormControl`, with an initial value.\n *\n * ```ts\n * const control = new FormControl('some value');\n * console.log(control.value);     // 'some value'\n *```\n *\n * The following example initializes the control with a form state object. The `value`\n * and `disabled` keys are required in this case.\n *\n * ```ts\n * const control = new FormControl({ value: 'n/a', disabled: true });\n * console.log(control.value);     // 'n/a'\n * console.log(control.status);    // 'DISABLED'\n * ```\n *\n * The following example initializes the control with a sync validator.\n *\n * ```ts\n * const control = new FormControl('', Validators.required);\n * console.log(control.value);      // ''\n * console.log(control.status);     // 'INVALID'\n * ```\n *\n * The following example initializes the control using an options object.\n *\n * ```ts\n * const control = new FormControl('', {\n *    validators: Validators.required,\n *    asyncValidators: myAsyncValidator\n * });\n * ```\n *\n * ### Configure the control to update on a blur event\n *\n * Set the `updateOn` option to `'blur'` to update on the blur `event`.\n *\n * ```ts\n * const control = new FormControl('', { updateOn: 'blur' });\n * ```\n *\n * ### Configure the control to update on a submit event\n *\n * Set the `updateOn` option to `'submit'` to update on a submit `event`.\n *\n * ```ts\n * const control = new FormControl('', { updateOn: 'submit' });\n * ```\n *\n * ### Reset the control back to an initial value\n *\n * You reset to a specific form state by passing through a standalone\n * value or a form state object that contains both a value and a disabled state\n * (these are the only two properties that cannot be calculated).\n *\n * ```ts\n * const control = new FormControl('Nancy');\n *\n * console.log(control.value); // 'Nancy'\n *\n * control.reset('Drew');\n *\n * console.log(control.value); // 'Drew'\n * ```\n *\n * ### Reset the control back to an initial value and disabled\n *\n * ```\n * const control = new FormControl('Nancy');\n *\n * console.log(control.value); // 'Nancy'\n * console.log(control.status); // 'VALID'\n *\n * control.reset({ value: 'Drew', disabled: true });\n *\n * console.log(control.value); // 'Drew'\n * console.log(control.status); // 'DISABLED'\n * ```\n *\n * @publicApi\n */\nexport class FormControl extends AbstractControl {\n  /** @internal */\n  _onChange: Function[] = [];\n\n  /** @internal */\n  _pendingValue: any;\n\n  /** @internal */\n  _pendingChange: any;\n\n  /**\n   * Creates a new `FormControl` instance.\n   *\n   * @param formState Initializes the control with an initial value,\n   * or an object that defines the initial value and disabled state.\n   *\n   * @param validatorOrOpts A synchronous validator function, or an array of\n   * such functions, or an `AbstractControlOptions` object that contains validation functions\n   * and a validation trigger.\n   *\n   * @param asyncValidator A single async validator or array of async validator functions\n   *\n   */\n  constructor(\n      formState: any = null,\n      validatorOrOpts?: ValidatorFn|ValidatorFn[]|AbstractControlOptions|null,\n      asyncValidator?: AsyncValidatorFn|AsyncValidatorFn[]|null) {\n    super(pickValidators(validatorOrOpts), pickAsyncValidators(asyncValidator, validatorOrOpts));\n    this._applyFormState(formState);\n    this._setUpdateStrategy(validatorOrOpts);\n    this.updateValueAndValidity({onlySelf: true, emitEvent: false});\n    this._initObservables();\n  }\n\n  /**\n   * Sets a new value for the form control.\n   *\n   * @param value The new value for the control.\n   * @param options Configuration options that determine how the control propagates changes\n   * and emits events when the value changes.\n   * The configuration options are passed to the {@link AbstractControl#updateValueAndValidity\n   * updateValueAndValidity} method.\n   *\n   * * `onlySelf`: When true, each change only affects this control, and not its parent. Default is\n   * false.\n   * * `emitEvent`: When true or not supplied (the default), both the `statusChanges` and\n   * `valueChanges`\n   * observables emit events with the latest status and value when the control value is updated.\n   * When false, no events are emitted.\n   * * `emitModelToViewChange`: When true or not supplied  (the default), each change triggers an\n   * `onChange` event to\n   * update the view.\n   * * `emitViewToModelChange`: When true or not supplied (the default), each change triggers an\n   * `ngModelChange`\n   * event to update the model.\n   *\n   */\n  setValue(value: any, options: {\n    onlySelf?: boolean,\n    emitEvent?: boolean,\n    emitModelToViewChange?: boolean,\n    emitViewToModelChange?: boolean\n  } = {}): void {\n    (this as {value: any}).value = this._pendingValue = value;\n    if (this._onChange.length && options.emitModelToViewChange !== false) {\n      this._onChange.forEach(\n          (changeFn) => changeFn(this.value, options.emitViewToModelChange !== false));\n    }\n    this.updateValueAndValidity(options);\n  }\n\n  /**\n   * Patches the value of a control.\n   *\n   * This function is functionally the same as {@link FormControl#setValue setValue} at this level.\n   * It exists for symmetry with {@link FormGroup#patchValue patchValue} on `FormGroups` and\n   * `FormArrays`, where it does behave differently.\n   *\n   * @see `setValue` for options\n   */\n  patchValue(value: any, options: {\n    onlySelf?: boolean,\n    emitEvent?: boolean,\n    emitModelToViewChange?: boolean,\n    emitViewToModelChange?: boolean\n  } = {}): void {\n    this.setValue(value, options);\n  }\n\n  /**\n   * Resets the form control, marking it `pristine` and `untouched`, and setting\n   * the value to null.\n   *\n   * @param formState Resets the control with an initial value,\n   * or an object that defines the initial value and disabled state.\n   *\n   * @param options Configuration options that determine how the control propagates changes\n   * and emits events after the value changes.\n   *\n   * * `onlySelf`: When true, each change only affects this control, and not its parent. Default is\n   * false.\n   * * `emitEvent`: When true or not supplied (the default), both the `statusChanges` and\n   * `valueChanges`\n   * observables emit events with the latest status and value when the control is reset.\n   * When false, no events are emitted.\n   *\n   */\n  reset(formState: any = null, options: {onlySelf?: boolean, emitEvent?: boolean} = {}): void {\n    this._applyFormState(formState);\n    this.markAsPristine(options);\n    this.markAsUntouched(options);\n    this.setValue(this.value, options);\n    this._pendingChange = false;\n  }\n\n  /**\n   * @internal\n   */\n  _updateValue() {}\n\n  /**\n   * @internal\n   */\n  _anyControls(condition: Function): boolean {\n    return false;\n  }\n\n  /**\n   * @internal\n   */\n  _allControlsDisabled(): boolean {\n    return this.disabled;\n  }\n\n  /**\n   * Register a listener for change events.\n   *\n   * @param fn The method that is called when the value changes\n   */\n  registerOnChange(fn: Function): void {\n    this._onChange.push(fn);\n  }\n\n  /**\n   * @internal\n   */\n  _clearChangeFns(): void {\n    this._onChange = [];\n    this._onDisabledChange = [];\n    this._onCollectionChange = () => {};\n  }\n\n  /**\n   * Register a listener for disabled events.\n   *\n   * @param fn The method that is called when the disabled status changes.\n   */\n  registerOnDisabledChange(fn: (isDisabled: boolean) => void): void {\n    this._onDisabledChange.push(fn);\n  }\n\n  /**\n   * @internal\n   */\n  _forEachChild(cb: Function): void {}\n\n  /** @internal */\n  _syncPendingControls(): boolean {\n    if (this.updateOn === 'submit') {\n      if (this._pendingDirty) this.markAsDirty();\n      if (this._pendingTouched) this.markAsTouched();\n      if (this._pendingChange) {\n        this.setValue(this._pendingValue, {onlySelf: true, emitModelToViewChange: false});\n        return true;\n      }\n    }\n    return false;\n  }\n\n  private _applyFormState(formState: any) {\n    if (this._isBoxedValue(formState)) {\n      (this as {value: any}).value = this._pendingValue = formState.value;\n      formState.disabled ? this.disable({onlySelf: true, emitEvent: false}) :\n                           this.enable({onlySelf: true, emitEvent: false});\n    } else {\n      (this as {value: any}).value = this._pendingValue = formState;\n    }\n  }\n}\n\n/**\n * Tracks the value and validity state of a group of `FormControl` instances.\n *\n * A `FormGroup` aggregates the values of each child `FormControl` into one object,\n * with each control name as the key.  It calculates its status by reducing the status values\n * of its children. For example, if one of the controls in a group is invalid, the entire\n * group becomes invalid.\n *\n * `FormGroup` is one of the three fundamental building blocks used to define forms in Angular,\n * along with `FormControl` and `FormArray`.\n *\n * When instantiating a `FormGroup`, pass in a collection of child controls as the first\n * argument. The key for each child registers the name for the control.\n *\n * @usageNotes\n *\n * ### Create a form group with 2 controls\n *\n * ```\n * const form = new FormGroup({\n *   first: new FormControl('Nancy', Validators.minLength(2)),\n *   last: new FormControl('Drew'),\n * });\n *\n * console.log(form.value);   // {first: 'Nancy', last; 'Drew'}\n * console.log(form.status);  // 'VALID'\n * ```\n *\n * ### Create a form group with a group-level validator\n *\n * You include group-level validators as the second arg, or group-level async\n * validators as the third arg. These come in handy when you want to perform validation\n * that considers the value of more than one child control.\n *\n * ```\n * const form = new FormGroup({\n *   password: new FormControl('', Validators.minLength(2)),\n *   passwordConfirm: new FormControl('', Validators.minLength(2)),\n * }, passwordMatchValidator);\n *\n *\n * function passwordMatchValidator(g: FormGroup) {\n *    return g.get('password').value === g.get('passwordConfirm').value\n *       ? null : {'mismatch': true};\n * }\n * ```\n *\n * Like `FormControl` instances, you choose to pass in\n * validators and async validators as part of an options object.\n *\n * ```\n * const form = new FormGroup({\n *   password: new FormControl('')\n *   passwordConfirm: new FormControl('')\n * }, { validators: passwordMatchValidator, asyncValidators: otherValidator });\n * ```\n *\n * ### Set the updateOn property for all controls in a form group\n *\n * The options object is used to set a default value for each child\n * control's `updateOn` property. If you set `updateOn` to `'blur'` at the\n * group level, all child controls default to 'blur', unless the child\n * has explicitly specified a different `updateOn` value.\n *\n * ```ts\n * const c = new FormGroup({\n *   one: new FormControl()\n * }, { updateOn: 'blur' });\n * ```\n *\n * @publicApi\n */\nexport class FormGroup extends AbstractControl {\n  /**\n   * Creates a new `FormGroup` instance.\n   *\n   * @param controls A collection of child controls. The key for each child is the name\n   * under which it is registered.\n   *\n   * @param validatorOrOpts A synchronous validator function, or an array of\n   * such functions, or an `AbstractControlOptions` object that contains validation functions\n   * and a validation trigger.\n   *\n   * @param asyncValidator A single async validator or array of async validator functions\n   *\n   */\n  constructor(\n      public controls: {[key: string]: AbstractControl},\n      validatorOrOpts?: ValidatorFn|ValidatorFn[]|AbstractControlOptions|null,\n      asyncValidator?: AsyncValidatorFn|AsyncValidatorFn[]|null) {\n    super(pickValidators(validatorOrOpts), pickAsyncValidators(asyncValidator, validatorOrOpts));\n    this._initObservables();\n    this._setUpdateStrategy(validatorOrOpts);\n    this._setUpControls();\n    this.updateValueAndValidity({onlySelf: true, emitEvent: false});\n  }\n\n  /**\n   * Registers a control with the group's list of controls.\n   *\n   * This method does not update the value or validity of the control.\n   * Use {@link FormGroup#addControl addControl} instead.\n   *\n   * @param name The control name to register in the collection\n   * @param control Provides the control for the given name\n   */\n  registerControl(name: string, control: AbstractControl): AbstractControl {\n    if (this.controls[name]) return this.controls[name];\n    this.controls[name] = control;\n    control.setParent(this);\n    control._registerOnCollectionChange(this._onCollectionChange);\n    return control;\n  }\n\n  /**\n   * Add a control to this group.\n   *\n   * This method also updates the value and validity of the control.\n   *\n   * @param name The control name to add to the collection\n   * @param control Provides the control for the given name\n   */\n  addControl(name: string, control: AbstractControl): void {\n    this.registerControl(name, control);\n    this.updateValueAndValidity();\n    this._onCollectionChange();\n  }\n\n  /**\n   * Remove a control from this group.\n   *\n   * @param name The control name to remove from the collection\n   */\n  removeControl(name: string): void {\n    if (this.controls[name]) this.controls[name]._registerOnCollectionChange(() => {});\n    delete (this.controls[name]);\n    this.updateValueAndValidity();\n    this._onCollectionChange();\n  }\n\n  /**\n   * Replace an existing control.\n   *\n   * @param name The control name to replace in the collection\n   * @param control Provides the control for the given name\n   */\n  setControl(name: string, control: AbstractControl): void {\n    if (this.controls[name]) this.controls[name]._registerOnCollectionChange(() => {});\n    delete (this.controls[name]);\n    if (control) this.registerControl(name, control);\n    this.updateValueAndValidity();\n    this._onCollectionChange();\n  }\n\n  /**\n   * Check whether there is an enabled control with the given name in the group.\n   *\n   * Reports false for disabled controls. If you'd like to check for existence in the group\n   * only, use {@link AbstractControl#get get} instead.\n   *\n   * @param controlName The control name to check for existence in the collection\n   *\n   * @returns false for disabled controls, true otherwise.\n   */\n  contains(controlName: string): boolean {\n    return this.controls.hasOwnProperty(controlName) && this.controls[controlName].enabled;\n  }\n\n  /**\n   * Sets the value of the `FormGroup`. It accepts an object that matches\n   * the structure of the group, with control names as keys.\n   *\n   * @usageNotes\n   * ### Set the complete value for the form group\n   *\n   * ```\n   * const form = new FormGroup({\n   *   first: new FormControl(),\n   *   last: new FormControl()\n   * });\n   *\n   * console.log(form.value);   // {first: null, last: null}\n   *\n   * form.setValue({first: 'Nancy', last: 'Drew'});\n   * console.log(form.value);   // {first: 'Nancy', last: 'Drew'}\n   * ```\n   *\n   * @throws When strict checks fail, such as setting the value of a control\n   * that doesn't exist or if you exclude a value of a control that does exist.\n   *\n   * @param value The new value for the control that matches the structure of the group.\n   * @param options Configuration options that determine how the control propagates changes\n   * and emits events after the value changes.\n   * The configuration options are passed to the {@link AbstractControl#updateValueAndValidity\n   * updateValueAndValidity} method.\n   *\n   * * `onlySelf`: When true, each change only affects this control, and not its parent. Default is\n   * false.\n   * * `emitEvent`: When true or not supplied (the default), both the `statusChanges` and\n   * `valueChanges`\n   * observables emit events with the latest status and value when the control value is updated.\n   * When false, no events are emitted.\n   */\n  setValue(value: {[key: string]: any}, options: {onlySelf?: boolean, emitEvent?: boolean} = {}):\n      void {\n    this._checkAllValuesPresent(value);\n    Object.keys(value).forEach(name => {\n      this._throwIfControlMissing(name);\n      this.controls[name].setValue(value[name], {onlySelf: true, emitEvent: options.emitEvent});\n    });\n    this.updateValueAndValidity(options);\n  }\n\n  /**\n   * Patches the value of the `FormGroup`. It accepts an object with control\n   * names as keys, and does its best to match the values to the correct controls\n   * in the group.\n   *\n   * It accepts both super-sets and sub-sets of the group without throwing an error.\n   *\n   * @usageNotes\n   * ### Patch the value for a form group\n   *\n   * ```\n   * const form = new FormGroup({\n   *    first: new FormControl(),\n   *    last: new FormControl()\n   * });\n   * console.log(form.value);   // {first: null, last: null}\n   *\n   * form.patchValue({first: 'Nancy'});\n   * console.log(form.value);   // {first: 'Nancy', last: null}\n   * ```\n   *\n   * @param value The object that matches the structure of the group.\n   * @param options Configuration options that determine how the control propagates changes and\n   * emits events after the value is patched.\n   * * `onlySelf`: When true, each change only affects this control and not its parent. Default is\n   * true.\n   * * `emitEvent`: When true or not supplied (the default), both the `statusChanges` and\n   * `valueChanges`\n   * observables emit events with the latest status and value when the control value is updated.\n   * When false, no events are emitted.\n   * The configuration options are passed to the {@link AbstractControl#updateValueAndValidity\n   * updateValueAndValidity} method.\n   */\n  patchValue(value: {[key: string]: any}, options: {onlySelf?: boolean, emitEvent?: boolean} = {}):\n      void {\n    Object.keys(value).forEach(name => {\n      if (this.controls[name]) {\n        this.controls[name].patchValue(value[name], {onlySelf: true, emitEvent: options.emitEvent});\n      }\n    });\n    this.updateValueAndValidity(options);\n  }\n\n  /**\n   * Resets the `FormGroup`, marks all descendants `pristine` and `untouched` and sets\n   * the value of all descendants to null.\n   *\n   * You reset to a specific form state by passing in a map of states\n   * that matches the structure of your form, with control names as keys. The state\n   * is a standalone value or a form state object with both a value and a disabled\n   * status.\n   *\n   * @param value Resets the control with an initial value,\n   * or an object that defines the initial value and disabled state.\n   *\n   * @param options Configuration options that determine how the control propagates changes\n   * and emits events when the group is reset.\n   * * `onlySelf`: When true, each change only affects this control, and not its parent. Default is\n   * false.\n   * * `emitEvent`: When true or not supplied (the default), both the `statusChanges` and\n   * `valueChanges`\n   * observables emit events with the latest status and value when the control is reset.\n   * When false, no events are emitted.\n   * The configuration options are passed to the {@link AbstractControl#updateValueAndValidity\n   * updateValueAndValidity} method.\n   *\n   * @usageNotes\n   *\n   * ### Reset the form group values\n   *\n   * ```ts\n   * const form = new FormGroup({\n   *   first: new FormControl('first name'),\n   *   last: new FormControl('last name')\n   * });\n   *\n   * console.log(form.value);  // {first: 'first name', last: 'last name'}\n   *\n   * form.reset({ first: 'name', last: 'last name' });\n   *\n   * console.log(form.value);  // {first: 'name', last: 'last name'}\n   * ```\n   *\n   * ### Reset the form group values and disabled status\n   *\n   * ```\n   * const form = new FormGroup({\n   *   first: new FormControl('first name'),\n   *   last: new FormControl('last name')\n   * });\n   *\n   * form.reset({\n   *   first: {value: 'name', disabled: true},\n   *   last: 'last'\n   * });\n   *\n   * console.log(this.form.value);  // {first: 'name', last: 'last name'}\n   * console.log(this.form.get('first').status);  // 'DISABLED'\n   * ```\n   */\n  reset(value: any = {}, options: {onlySelf?: boolean, emitEvent?: boolean} = {}): void {\n    this._forEachChild((control: AbstractControl, name: string) => {\n      control.reset(value[name], {onlySelf: true, emitEvent: options.emitEvent});\n    });\n    this._updatePristine(options);\n    this._updateTouched(options);\n    this.updateValueAndValidity(options);\n  }\n\n  /**\n   * The aggregate value of the `FormGroup`, including any disabled controls.\n   *\n   * Retrieves all values regardless of disabled status.\n   * The `value` property is the best way to get the value of the group, because\n   * it excludes disabled controls in the `FormGroup`.\n   */\n  getRawValue(): any {\n    return this._reduceChildren(\n        {}, (acc: {[k: string]: AbstractControl}, control: AbstractControl, name: string) => {\n          acc[name] = control instanceof FormControl ? control.value : (<any>control).getRawValue();\n          return acc;\n        });\n  }\n\n  /** @internal */\n  _syncPendingControls(): boolean {\n    let subtreeUpdated = this._reduceChildren(false, (updated: boolean, child: AbstractControl) => {\n      return child._syncPendingControls() ? true : updated;\n    });\n    if (subtreeUpdated) this.updateValueAndValidity({onlySelf: true});\n    return subtreeUpdated;\n  }\n\n  /** @internal */\n  _throwIfControlMissing(name: string): void {\n    if (!Object.keys(this.controls).length) {\n      throw new Error(`\n        There are no form controls registered with this group yet. If you're using ngModel,\n        you may want to check next tick (e.g. use setTimeout).\n      `);\n    }\n    if (!this.controls[name]) {\n      throw new Error(`Cannot find form control with name: ${name}.`);\n    }\n  }\n\n  /** @internal */\n  _forEachChild(cb: (v: any, k: string) => void): void {\n    Object.keys(this.controls).forEach(k => cb(this.controls[k], k));\n  }\n\n  /** @internal */\n  _setUpControls(): void {\n    this._forEachChild((control: AbstractControl) => {\n      control.setParent(this);\n      control._registerOnCollectionChange(this._onCollectionChange);\n    });\n  }\n\n  /** @internal */\n  _updateValue(): void {\n    (this as {value: any}).value = this._reduceValue();\n  }\n\n  /** @internal */\n  _anyControls(condition: Function): boolean {\n    for (const controlName of Object.keys(this.controls)) {\n      const control = this.controls[controlName];\n      if (this.contains(controlName) && condition(control)) {\n        return true;\n      }\n    }\n    return false;\n  }\n\n  /** @internal */\n  _reduceValue() {\n    return this._reduceChildren(\n        {}, (acc: {[k: string]: AbstractControl}, control: AbstractControl, name: string) => {\n          if (control.enabled || this.disabled) {\n            acc[name] = control.value;\n          }\n          return acc;\n        });\n  }\n\n  /** @internal */\n  _reduceChildren(initValue: any, fn: Function) {\n    let res = initValue;\n    this._forEachChild((control: AbstractControl, name: string) => {\n      res = fn(res, control, name);\n    });\n    return res;\n  }\n\n  /** @internal */\n  _allControlsDisabled(): boolean {\n    for (const controlName of Object.keys(this.controls)) {\n      if (this.controls[controlName].enabled) {\n        return false;\n      }\n    }\n    return Object.keys(this.controls).length > 0 || this.disabled;\n  }\n\n  /** @internal */\n  _checkAllValuesPresent(value: any): void {\n    this._forEachChild((control: AbstractControl, name: string) => {\n      if (value[name] === undefined) {\n        throw new Error(`Must supply a value for form control with name: '${name}'.`);\n      }\n    });\n  }\n}\n\n/**\n * Tracks the value and validity state of an array of `FormControl`,\n * `FormGroup` or `FormArray` instances.\n *\n * A `FormArray` aggregates the values of each child `FormControl` into an array.\n * It calculates its status by reducing the status values of its children. For example, if one of\n * the controls in a `FormArray` is invalid, the entire array becomes invalid.\n *\n * `FormArray` is one of the three fundamental building blocks used to define forms in Angular,\n * along with `FormControl` and `FormGroup`.\n *\n * @usageNotes\n *\n * ### Create an array of form controls\n *\n * ```\n * const arr = new FormArray([\n *   new FormControl('Nancy', Validators.minLength(2)),\n *   new FormControl('Drew'),\n * ]);\n *\n * console.log(arr.value);   // ['Nancy', 'Drew']\n * console.log(arr.status);  // 'VALID'\n * ```\n *\n * ### Create a form array with array-level validators\n *\n * You include array-level validators and async validators. These come in handy\n * when you want to perform validation that considers the value of more than one child\n * control.\n *\n * The two types of validators are passed in separately as the second and third arg\n * respectively, or together as part of an options object.\n *\n * ```\n * const arr = new FormArray([\n *   new FormControl('Nancy'),\n *   new FormControl('Drew')\n * ], {validators: myValidator, asyncValidators: myAsyncValidator});\n * ```\n *\n * ### Set the updateOn property for all controls in a form array\n *\n * The options object is used to set a default value for each child\n * control's `updateOn` property. If you set `updateOn` to `'blur'` at the\n * array level, all child controls default to 'blur', unless the child\n * has explicitly specified a different `updateOn` value.\n *\n * ```ts\n * const arr = new FormArray([\n *    new FormControl()\n * ], {updateOn: 'blur'});\n * ```\n *\n * ### Adding or removing controls from a form array\n *\n * To change the controls in the array, use the `push`, `insert`, `removeAt` or `clear` methods\n * in `FormArray` itself. These methods ensure the controls are properly tracked in the\n * form's hierarchy. Do not modify the array of `AbstractControl`s used to instantiate\n * the `FormArray` directly, as that result in strange and unexpected behavior such\n * as broken change detection.\n *\n * @publicApi\n */\nexport class FormArray extends AbstractControl {\n  /**\n   * Creates a new `FormArray` instance.\n   *\n   * @param controls An array of child controls. Each child control is given an index\n   * where it is registered.\n   *\n   * @param validatorOrOpts A synchronous validator function, or an array of\n   * such functions, or an `AbstractControlOptions` object that contains validation functions\n   * and a validation trigger.\n   *\n   * @param asyncValidator A single async validator or array of async validator functions\n   *\n   */\n  constructor(\n      public controls: AbstractControl[],\n      validatorOrOpts?: ValidatorFn|ValidatorFn[]|AbstractControlOptions|null,\n      asyncValidator?: AsyncValidatorFn|AsyncValidatorFn[]|null) {\n    super(pickValidators(validatorOrOpts), pickAsyncValidators(asyncValidator, validatorOrOpts));\n    this._initObservables();\n    this._setUpdateStrategy(validatorOrOpts);\n    this._setUpControls();\n    this.updateValueAndValidity({onlySelf: true, emitEvent: false});\n  }\n\n  /**\n   * Get the `AbstractControl` at the given `index` in the array.\n   *\n   * @param index Index in the array to retrieve the control\n   */\n  at(index: number): AbstractControl {\n    return this.controls[index];\n  }\n\n  /**\n   * Insert a new `AbstractControl` at the end of the array.\n   *\n   * @param control Form control to be inserted\n   */\n  push(control: AbstractControl): void {\n    this.controls.push(control);\n    this._registerControl(control);\n    this.updateValueAndValidity();\n    this._onCollectionChange();\n  }\n\n  /**\n   * Insert a new `AbstractControl` at the given `index` in the array.\n   *\n   * @param index Index in the array to insert the control\n   * @param control Form control to be inserted\n   */\n  insert(index: number, control: AbstractControl): void {\n    this.controls.splice(index, 0, control);\n\n    this._registerControl(control);\n    this.updateValueAndValidity();\n  }\n\n  /**\n   * Remove the control at the given `index` in the array.\n   *\n   * @param index Index in the array to remove the control\n   */\n  removeAt(index: number): void {\n    if (this.controls[index]) this.controls[index]._registerOnCollectionChange(() => {});\n    this.controls.splice(index, 1);\n    this.updateValueAndValidity();\n  }\n\n  /**\n   * Replace an existing control.\n   *\n   * @param index Index in the array to replace the control\n   * @param control The `AbstractControl` control to replace the existing control\n   */\n  setControl(index: number, control: AbstractControl): void {\n    if (this.controls[index]) this.controls[index]._registerOnCollectionChange(() => {});\n    this.controls.splice(index, 1);\n\n    if (control) {\n      this.controls.splice(index, 0, control);\n      this._registerControl(control);\n    }\n\n    this.updateValueAndValidity();\n    this._onCollectionChange();\n  }\n\n  /**\n   * Length of the control array.\n   */\n  get length(): number {\n    return this.controls.length;\n  }\n\n  /**\n   * Sets the value of the `FormArray`. It accepts an array that matches\n   * the structure of the control.\n   *\n   * This method performs strict checks, and throws an error if you try\n   * to set the value of a control that doesn't exist or if you exclude the\n   * value of a control.\n   *\n   * @usageNotes\n   * ### Set the values for the controls in the form array\n   *\n   * ```\n   * const arr = new FormArray([\n   *   new FormControl(),\n   *   new FormControl()\n   * ]);\n   * console.log(arr.value);   // [null, null]\n   *\n   * arr.setValue(['Nancy', 'Drew']);\n   * console.log(arr.value);   // ['Nancy', 'Drew']\n   * ```\n   *\n   * @param value Array of values for the controls\n   * @param options Configure options that determine how the control propagates changes and\n   * emits events after the value changes\n   *\n   * * `onlySelf`: When true, each change only affects this control, and not its parent. Default\n   * is false.\n   * * `emitEvent`: When true or not supplied (the default), both the `statusChanges` and\n   * `valueChanges`\n   * observables emit events with the latest status and value when the control value is updated.\n   * When false, no events are emitted.\n   * The configuration options are passed to the {@link AbstractControl#updateValueAndValidity\n   * updateValueAndValidity} method.\n   */\n  setValue(value: any[], options: {onlySelf?: boolean, emitEvent?: boolean} = {}): void {\n    this._checkAllValuesPresent(value);\n    value.forEach((newValue: any, index: number) => {\n      this._throwIfControlMissing(index);\n      this.at(index).setValue(newValue, {onlySelf: true, emitEvent: options.emitEvent});\n    });\n    this.updateValueAndValidity(options);\n  }\n\n  /**\n   * Patches the value of the `FormArray`. It accepts an array that matches the\n   * structure of the control, and does its best to match the values to the correct\n   * controls in the group.\n   *\n   * It accepts both super-sets and sub-sets of the array without throwing an error.\n   *\n   * @usageNotes\n   * ### Patch the values for controls in a form array\n   *\n   * ```\n   * const arr = new FormArray([\n   *    new FormControl(),\n   *    new FormControl()\n   * ]);\n   * console.log(arr.value);   // [null, null]\n   *\n   * arr.patchValue(['Nancy']);\n   * console.log(arr.value);   // ['Nancy', null]\n   * ```\n   *\n   * @param value Array of latest values for the controls\n   * @param options Configure options that determine how the control propagates changes and\n   * emits events after the value changes\n   *\n   * * `onlySelf`: When true, each change only affects this control, and not its parent. Default\n   * is false.\n   * * `emitEvent`: When true or not supplied (the default), both the `statusChanges` and\n   * `valueChanges`\n   * observables emit events with the latest status and value when the control value is updated.\n   * When false, no events are emitted.\n   * The configuration options are passed to the {@link AbstractControl#updateValueAndValidity\n   * updateValueAndValidity} method.\n   */\n  patchValue(value: any[], options: {onlySelf?: boolean, emitEvent?: boolean} = {}): void {\n    value.forEach((newValue: any, index: number) => {\n      if (this.at(index)) {\n        this.at(index).patchValue(newValue, {onlySelf: true, emitEvent: options.emitEvent});\n      }\n    });\n    this.updateValueAndValidity(options);\n  }\n\n  /**\n   * Resets the `FormArray` and all descendants are marked `pristine` and `untouched`, and the\n   * value of all descendants to null or null maps.\n   *\n   * You reset to a specific form state by passing in an array of states\n   * that matches the structure of the control. The state is a standalone value\n   * or a form state object with both a value and a disabled status.\n   *\n   * @usageNotes\n   * ### Reset the values in a form array\n   *\n   * ```ts\n   * const arr = new FormArray([\n   *    new FormControl(),\n   *    new FormControl()\n   * ]);\n   * arr.reset(['name', 'last name']);\n   *\n   * console.log(this.arr.value);  // ['name', 'last name']\n   * ```\n   *\n   * ### Reset the values in a form array and the disabled status for the first control\n   *\n   * ```\n   * this.arr.reset([\n   *   {value: 'name', disabled: true},\n   *   'last'\n   * ]);\n   *\n   * console.log(this.arr.value);  // ['name', 'last name']\n   * console.log(this.arr.get(0).status);  // 'DISABLED'\n   * ```\n   *\n   * @param value Array of values for the controls\n   * @param options Configure options that determine how the control propagates changes and\n   * emits events after the value changes\n   *\n   * * `onlySelf`: When true, each change only affects this control, and not its parent. Default\n   * is false.\n   * * `emitEvent`: When true or not supplied (the default), both the `statusChanges` and\n   * `valueChanges`\n   * observables emit events with the latest status and value when the control is reset.\n   * When false, no events are emitted.\n   * The configuration options are passed to the {@link AbstractControl#updateValueAndValidity\n   * updateValueAndValidity} method.\n   */\n  reset(value: any = [], options: {onlySelf?: boolean, emitEvent?: boolean} = {}): void {\n    this._forEachChild((control: AbstractControl, index: number) => {\n      control.reset(value[index], {onlySelf: true, emitEvent: options.emitEvent});\n    });\n    this._updatePristine(options);\n    this._updateTouched(options);\n    this.updateValueAndValidity(options);\n  }\n\n  /**\n   * The aggregate value of the array, including any disabled controls.\n   *\n   * Reports all values regardless of disabled status.\n   * For enabled controls only, the `value` property is the best way to get the value of the array.\n   */\n  getRawValue(): any[] {\n    return this.controls.map((control: AbstractControl) => {\n      return control instanceof FormControl ? control.value : (<any>control).getRawValue();\n    });\n  }\n\n  /**\n   * Remove all controls in the `FormArray`.\n   *\n   * @usageNotes\n   * ### Remove all elements from a FormArray\n   *\n   * ```ts\n   * const arr = new FormArray([\n   *    new FormControl(),\n   *    new FormControl()\n   * ]);\n   * console.log(arr.length);  // 2\n   *\n   * arr.clear();\n   * console.log(arr.length);  // 0\n   * ```\n   *\n   * It's a simpler and more efficient alternative to removing all elements one by one:\n   *\n   * ```ts\n   * const arr = new FormArray([\n   *    new FormControl(),\n   *    new FormControl()\n   * ]);\n   *\n   * while (arr.length) {\n   *    arr.removeAt(0);\n   * }\n   * ```\n   */\n  clear(): void {\n    if (this.controls.length < 1) return;\n    this._forEachChild((control: AbstractControl) => control._registerOnCollectionChange(() => {}));\n    this.controls.splice(0);\n    this.updateValueAndValidity();\n  }\n\n  /** @internal */\n  _syncPendingControls(): boolean {\n    let subtreeUpdated = this.controls.reduce((updated: boolean, child: AbstractControl) => {\n      return child._syncPendingControls() ? true : updated;\n    }, false);\n    if (subtreeUpdated) this.updateValueAndValidity({onlySelf: true});\n    return subtreeUpdated;\n  }\n\n  /** @internal */\n  _throwIfControlMissing(index: number): void {\n    if (!this.controls.length) {\n      throw new Error(`\n        There are no form controls registered with this array yet. If you're using ngModel,\n        you may want to check next tick (e.g. use setTimeout).\n      `);\n    }\n    if (!this.at(index)) {\n      throw new Error(`Cannot find form control at index ${index}`);\n    }\n  }\n\n  /** @internal */\n  _forEachChild(cb: Function): void {\n    this.controls.forEach((control: AbstractControl, index: number) => {\n      cb(control, index);\n    });\n  }\n\n  /** @internal */\n  _updateValue(): void {\n    (this as {value: any}).value =\n        this.controls.filter((control) => control.enabled || this.disabled)\n            .map((control) => control.value);\n  }\n\n  /** @internal */\n  _anyControls(condition: Function): boolean {\n    return this.controls.some((control: AbstractControl) => control.enabled && condition(control));\n  }\n\n  /** @internal */\n  _setUpControls(): void {\n    this._forEachChild((control: AbstractControl) => this._registerControl(control));\n  }\n\n  /** @internal */\n  _checkAllValuesPresent(value: any): void {\n    this._forEachChild((control: AbstractControl, i: number) => {\n      if (value[i] === undefined) {\n        throw new Error(`Must supply a value for form control at index: ${i}.`);\n      }\n    });\n  }\n\n  /** @internal */\n  _allControlsDisabled(): boolean {\n    for (const control of this.controls) {\n      if (control.enabled) return false;\n    }\n    return this.controls.length > 0 || this.disabled;\n  }\n\n  private _registerControl(control: AbstractControl) {\n    control.setParent(this);\n    control._registerOnCollectionChange(this._onCollectionChange);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {AfterViewInit, Directive, EventEmitter, forwardRef, Inject, Input, Optional, Self} from '@angular/core';\n\nimport {AbstractControl, FormControl, FormGroup, FormHooks} from '../model';\nimport {NG_ASYNC_VALIDATORS, NG_VALIDATORS} from '../validators';\n\nimport {ControlContainer} from './control_container';\nimport {Form} from './form_interface';\nimport {NgControl} from './ng_control';\nimport {NgModel} from './ng_model';\nimport {NgModelGroup} from './ng_model_group';\nimport {composeAsyncValidators, composeValidators, removeDir, setUpControl, setUpFormContainer, syncPendingControls} from './shared';\n\nexport const formDirectiveProvider: any = {\n  provide: ControlContainer,\n  useExisting: forwardRef(() => NgForm)\n};\n\nconst resolvedPromise = (() => Promise.resolve(null))();\n\n/**\n * @description\n * Creates a top-level `FormGroup` instance and binds it to a form\n * to track aggregate form value and validation status.\n *\n * As soon as you import the `FormsModule`, this directive becomes active by default on\n * all `<form>` tags.  You don't need to add a special selector.\n *\n * You optionally export the directive into a local template variable using `ngForm` as the key\n * (ex: `#myForm=\"ngForm\"`). This is optional, but useful.  Many properties from the underlying\n * `FormGroup` instance are duplicated on the directive itself, so a reference to it\n * gives you access to the aggregate value and validity status of the form, as well as\n * user interaction properties like `dirty` and `touched`.\n *\n * To register child controls with the form, use `NgModel` with a `name`\n * attribute. You may use `NgModelGroup` to create sub-groups within the form.\n *\n * If necessary, listen to the directive's `ngSubmit` event to be notified when the user has\n * triggered a form submission. The `ngSubmit` event emits the original form\n * submission event.\n *\n * In template driven forms, all `<form>` tags are automatically tagged as `NgForm`.\n * To import the `FormsModule` but skip its usage in some forms,\n * for example, to use native HTML5 validation, add the `ngNoForm` and the `<form>`\n * tags won't create an `NgForm` directive. In reactive forms, using `ngNoForm` is\n * unnecessary because the `<form>` tags are inert. In that case, you would\n * refrain from using the `formGroup` directive.\n *\n * @usageNotes\n *\n * ### Listening for form submission\n *\n * The following example shows how to capture the form values from the \"ngSubmit\" event.\n *\n * {@example forms/ts/simpleForm/simple_form_example.ts region='Component'}\n *\n * ### Setting the update options\n *\n * The following example shows you how to change the \"updateOn\" option from its default using\n * ngFormOptions.\n *\n * ```html\n * <form [ngFormOptions]=\"{updateOn: 'blur'}\">\n *    <input name=\"one\" ngModel>  <!-- this ngModel will update on blur -->\n * </form>\n * ```\n *\n * ### Native DOM validation UI\n *\n * In order to prevent the native DOM form validation UI from interfering with Angular's form\n * validation, Angular automatically adds the `novalidate` attribute on any `<form>` whenever\n * `FormModule` or `ReactiveFormModule` are imported into the application.\n * If you want to explicitly enable native DOM validation UI with Angular forms, you can add the\n * `ngNativeValidate` attribute to the `<form>` element:\n *\n * ```html\n * <form ngNativeValidate>\n *   ...\n * </form>\n * ```\n *\n * @ngModule FormsModule\n * @publicApi\n */\n@Directive({\n  selector: 'form:not([ngNoForm]):not([formGroup]),ng-form,[ngForm]',\n  providers: [formDirectiveProvider],\n  host: {'(submit)': 'onSubmit($event)', '(reset)': 'onReset()'},\n  outputs: ['ngSubmit'],\n  exportAs: 'ngForm'\n})\nexport class NgForm extends ControlContainer implements Form, AfterViewInit {\n  /**\n   * @description\n   * Returns whether the form submission has been triggered.\n   */\n  public readonly submitted: boolean = false;\n\n  private _directives: NgModel[] = [];\n\n  /**\n   * @description\n   * The `FormGroup` instance created for this form.\n   */\n  form: FormGroup;\n\n  /**\n   * @description\n   * Event emitter for the \"ngSubmit\" event\n   */\n  ngSubmit = new EventEmitter();\n\n  /**\n   * @description\n   * Tracks options for the `NgForm` instance.\n   *\n   * **updateOn**: Sets the default `updateOn` value for all child `NgModels` below it\n   * unless explicitly set by a child `NgModel` using `ngModelOptions`). Defaults to 'change'.\n   * Possible values: `'change'` | `'blur'` | `'submit'`.\n   *\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input('ngFormOptions') options!: {updateOn?: FormHooks};\n\n  constructor(\n      @Optional() @Self() @Inject(NG_VALIDATORS) validators: any[],\n      @Optional() @Self() @Inject(NG_ASYNC_VALIDATORS) asyncValidators: any[]) {\n    super();\n    this.form =\n        new FormGroup({}, composeValidators(validators), composeAsyncValidators(asyncValidators));\n  }\n\n  /** @nodoc */\n  ngAfterViewInit() {\n    this._setUpdateStrategy();\n  }\n\n  /**\n   * @description\n   * The directive instance.\n   */\n  get formDirective(): Form {\n    return this;\n  }\n\n  /**\n   * @description\n   * The internal `FormGroup` instance.\n   */\n  get control(): FormGroup {\n    return this.form;\n  }\n\n  /**\n   * @description\n   * Returns an array representing the path to this group. Because this directive\n   * always lives at the top level of a form, it is always an empty array.\n   */\n  get path(): string[] {\n    return [];\n  }\n\n  /**\n   * @description\n   * Returns a map of the controls in this group.\n   */\n  get controls(): {[key: string]: AbstractControl} {\n    return this.form.controls;\n  }\n\n  /**\n   * @description\n   * Method that sets up the control directive in this group, re-calculates its value\n   * and validity, and adds the instance to the internal list of directives.\n   *\n   * @param dir The `NgModel` directive instance.\n   */\n  addControl(dir: NgModel): void {\n    resolvedPromise.then(() => {\n      const container = this._findContainer(dir.path);\n      (dir as {control: FormControl}).control =\n          <FormControl>container.registerControl(dir.name, dir.control);\n      setUpControl(dir.control, dir);\n      dir.control.updateValueAndValidity({emitEvent: false});\n      this._directives.push(dir);\n    });\n  }\n\n  /**\n   * @description\n   * Retrieves the `FormControl` instance from the provided `NgModel` directive.\n   *\n   * @param dir The `NgModel` directive instance.\n   */\n  getControl(dir: NgModel): FormControl {\n    return <FormControl>this.form.get(dir.path);\n  }\n\n  /**\n   * @description\n   * Removes the `NgModel` instance from the internal list of directives\n   *\n   * @param dir The `NgModel` directive instance.\n   */\n  removeControl(dir: NgModel): void {\n    resolvedPromise.then(() => {\n      const container = this._findContainer(dir.path);\n      if (container) {\n        container.removeControl(dir.name);\n      }\n      removeDir<NgModel>(this._directives, dir);\n    });\n  }\n\n  /**\n   * @description\n   * Adds a new `NgModelGroup` directive instance to the form.\n   *\n   * @param dir The `NgModelGroup` directive instance.\n   */\n  addFormGroup(dir: NgModelGroup): void {\n    resolvedPromise.then(() => {\n      const container = this._findContainer(dir.path);\n      const group = new FormGroup({});\n      setUpFormContainer(group, dir);\n      container.registerControl(dir.name, group);\n      group.updateValueAndValidity({emitEvent: false});\n    });\n  }\n\n  /**\n   * @description\n   * Removes the `NgModelGroup` directive instance from the form.\n   *\n   * @param dir The `NgModelGroup` directive instance.\n   */\n  removeFormGroup(dir: NgModelGroup): void {\n    resolvedPromise.then(() => {\n      const container = this._findContainer(dir.path);\n      if (container) {\n        container.removeControl(dir.name);\n      }\n    });\n  }\n\n  /**\n   * @description\n   * Retrieves the `FormGroup` for a provided `NgModelGroup` directive instance\n   *\n   * @param dir The `NgModelGroup` directive instance.\n   */\n  getFormGroup(dir: NgModelGroup): FormGroup {\n    return <FormGroup>this.form.get(dir.path);\n  }\n\n  /**\n   * Sets the new value for the provided `NgControl` directive.\n   *\n   * @param dir The `NgControl` directive instance.\n   * @param value The new value for the directive's control.\n   */\n  updateModel(dir: NgControl, value: any): void {\n    resolvedPromise.then(() => {\n      const ctrl = <FormControl>this.form.get(dir.path!);\n      ctrl.setValue(value);\n    });\n  }\n\n  /**\n   * @description\n   * Sets the value for this `FormGroup`.\n   *\n   * @param value The new value\n   */\n  setValue(value: {[key: string]: any}): void {\n    this.control.setValue(value);\n  }\n\n  /**\n   * @description\n   * Method called when the \"submit\" event is triggered on the form.\n   * Triggers the `ngSubmit` emitter to emit the \"submit\" event as its payload.\n   *\n   * @param $event The \"submit\" event object\n   */\n  onSubmit($event: Event): boolean {\n    (this as {submitted: boolean}).submitted = true;\n    syncPendingControls(this.form, this._directives);\n    this.ngSubmit.emit($event);\n    return false;\n  }\n\n  /**\n   * @description\n   * Method called when the \"reset\" event is triggered on the form.\n   */\n  onReset(): void {\n    this.resetForm();\n  }\n\n  /**\n   * @description\n   * Resets the form to an initial value and resets its submitted status.\n   *\n   * @param value The new value for the form.\n   */\n  resetForm(value: any = undefined): void {\n    this.form.reset(value);\n    (this as {submitted: boolean}).submitted = false;\n  }\n\n  private _setUpdateStrategy() {\n    if (this.options && this.options.updateOn != null) {\n      this.form._updateOn = this.options.updateOn;\n    }\n  }\n\n  /** @internal */\n  _findContainer(path: string[]): FormGroup {\n    path.pop();\n    return path.length ? <FormGroup>this.form.get(path) : this.form;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, OnDestroy, OnInit} from '@angular/core';\n\nimport {FormGroup} from '../model';\n\nimport {ControlContainer} from './control_container';\nimport {Form} from './form_interface';\nimport {composeAsyncValidators, composeValidators, controlPath} from './shared';\nimport {AsyncValidatorFn, ValidatorFn} from './validators';\n\n\n\n/**\n * @description\n * A base class for code shared between the `NgModelGroup` and `FormGroupName` directives.\n *\n * @publicApi\n */\n@Directive()\nexport class AbstractFormGroupDirective extends ControlContainer implements OnInit, OnDestroy {\n  /**\n   * @description\n   * The parent control for the group\n   *\n   * @internal\n   */\n  // TODO(issue/24571): remove '!'.\n  _parent!: ControlContainer;\n\n  /**\n   * @description\n   * An array of synchronous validators for the group\n   *\n   * @internal\n   */\n  // TODO(issue/24571): remove '!'.\n  _validators!: any[];\n\n  /**\n   * @description\n   * An array of async validators for the group\n   *\n   * @internal\n   */\n  // TODO(issue/24571): remove '!'.\n  _asyncValidators!: any[];\n\n  /** @nodoc */\n  ngOnInit(): void {\n    this._checkParentType();\n    // Register the group with its parent group.\n    this.formDirective!.addFormGroup(this);\n  }\n\n  /** @nodoc */\n  ngOnDestroy(): void {\n    if (this.formDirective) {\n      // Remove the group from its parent group.\n      this.formDirective.removeFormGroup(this);\n    }\n  }\n\n  /**\n   * @description\n   * The `FormGroup` bound to this directive.\n   */\n  get control(): FormGroup {\n    return this.formDirective!.getFormGroup(this);\n  }\n\n  /**\n   * @description\n   * The path to this group from the top-level directive.\n   */\n  get path(): string[] {\n    return controlPath(this.name == null ? this.name : this.name.toString(), this._parent);\n  }\n\n  /**\n   * @description\n   * The top-level directive for this group if present, otherwise null.\n   */\n  get formDirective(): Form|null {\n    return this._parent ? this._parent.formDirective : null;\n  }\n\n  /**\n   * @description\n   * The synchronous validators registered with this group.\n   */\n  get validator(): ValidatorFn|null {\n    return composeValidators(this._validators);\n  }\n\n  /**\n   * @description\n   * The async validators registered with this group.\n   */\n  get asyncValidator(): AsyncValidatorFn|null {\n    return composeAsyncValidators(this._asyncValidators);\n  }\n\n  /** @internal */\n  _checkParentType(): void {}\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {FormErrorExamples as Examples} from './error_examples';\n\nexport class TemplateDrivenErrors {\n  static modelParentException(): void {\n    throw new Error(`\n      ngModel cannot be used to register form controls with a parent formGroup directive.  Try using\n      formGroup's partner directive \"formControlName\" instead.  Example:\n\n      ${Examples.formControlName}\n\n      Or, if you'd like to avoid registering this form control, indicate that it's standalone in ngModelOptions:\n\n      Example:\n\n      ${Examples.ngModelWithFormGroup}`);\n  }\n\n  static formGroupNameException(): void {\n    throw new Error(`\n      ngModel cannot be used to register form controls with a parent formGroupName or formArrayName directive.\n\n      Option 1: Use formControlName instead of ngModel (reactive strategy):\n\n      ${Examples.formGroupName}\n\n      Option 2:  Update ngModel's parent be ngModelGroup (template-driven strategy):\n\n      ${Examples.ngModelGroup}`);\n  }\n\n  static missingNameException() {\n    throw new Error(\n        `If ngModel is used within a form tag, either the name attribute must be set or the form\n      control must be defined as 'standalone' in ngModelOptions.\n\n      Example 1: <input [(ngModel)]=\"person.firstName\" name=\"first\">\n      Example 2: <input [(ngModel)]=\"person.firstName\" [ngModelOptions]=\"{standalone: true}\">`);\n  }\n\n  static modelGroupParentException() {\n    throw new Error(`\n      ngModelGroup cannot be used with a parent formGroup directive.\n\n      Option 1: Use formGroupName instead of ngModelGroup (reactive strategy):\n\n      ${Examples.formGroupName}\n\n      Option 2:  Use a regular form tag instead of the formGroup directive (template-driven strategy):\n\n      ${Examples.ngModelGroup}`);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, forwardRef, Host, Inject, Input, OnDestroy, OnInit, Optional, Self, SkipSelf} from '@angular/core';\n\nimport {NG_ASYNC_VALIDATORS, NG_VALIDATORS} from '../validators';\n\nimport {AbstractFormGroupDirective} from './abstract_form_group_directive';\nimport {ControlContainer} from './control_container';\nimport {NgForm} from './ng_form';\nimport {TemplateDrivenErrors} from './template_driven_errors';\n\nexport const modelGroupProvider: any = {\n  provide: ControlContainer,\n  useExisting: forwardRef(() => NgModelGroup)\n};\n\n/**\n * @description\n * Creates and binds a `FormGroup` instance to a DOM element.\n *\n * This directive can only be used as a child of `NgForm` (within `<form>` tags).\n *\n * Use this directive to validate a sub-group of your form separately from the\n * rest of your form, or if some values in your domain model make more sense\n * to consume together in a nested object.\n *\n * Provide a name for the sub-group and it will become the key\n * for the sub-group in the form's full value. If you need direct access, export the directive into\n * a local template variable using `ngModelGroup` (ex: `#myGroup=\"ngModelGroup\"`).\n *\n * @usageNotes\n *\n * ### Consuming controls in a grouping\n *\n * The following example shows you how to combine controls together in a sub-group\n * of the form.\n *\n * {@example forms/ts/ngModelGroup/ng_model_group_example.ts region='Component'}\n *\n * @ngModule FormsModule\n * @publicApi\n */\n@Directive({selector: '[ngModelGroup]', providers: [modelGroupProvider], exportAs: 'ngModelGroup'})\nexport class NgModelGroup extends AbstractFormGroupDirective implements OnInit, OnDestroy {\n  /**\n   * @description\n   * Tracks the name of the `NgModelGroup` bound to the directive. The name corresponds\n   * to a key in the parent `NgForm`.\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input('ngModelGroup') name!: string;\n\n  constructor(\n      @Host() @SkipSelf() parent: ControlContainer,\n      @Optional() @Self() @Inject(NG_VALIDATORS) validators: any[],\n      @Optional() @Self() @Inject(NG_ASYNC_VALIDATORS) asyncValidators: any[]) {\n    super();\n    this._parent = parent;\n    this._validators = validators;\n    this._asyncValidators = asyncValidators;\n  }\n\n  /** @internal */\n  _checkParentType(): void {\n    if (!(this._parent instanceof NgModelGroup) && !(this._parent instanceof NgForm) &&\n        (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      TemplateDrivenErrors.modelGroupParentException();\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, EventEmitter, forwardRef, Host, Inject, Input, OnChanges, OnDestroy, Optional, Output, Self, SimpleChanges} from '@angular/core';\n\nimport {FormControl, FormHooks} from '../model';\nimport {NG_ASYNC_VALIDATORS, NG_VALIDATORS} from '../validators';\n\nimport {AbstractFormGroupDirective} from './abstract_form_group_directive';\nimport {ControlContainer} from './control_container';\nimport {ControlValueAccessor, NG_VALUE_ACCESSOR} from './control_value_accessor';\nimport {NgControl} from './ng_control';\nimport {NgForm} from './ng_form';\nimport {NgModelGroup} from './ng_model_group';\nimport {composeAsyncValidators, composeValidators, controlPath, isPropertyUpdated, selectValueAccessor, setUpControl} from './shared';\nimport {TemplateDrivenErrors} from './template_driven_errors';\nimport {AsyncValidator, AsyncValidatorFn, Validator, ValidatorFn} from './validators';\n\nexport const formControlBinding: any = {\n  provide: NgControl,\n  useExisting: forwardRef(() => NgModel)\n};\n\n/**\n * `ngModel` forces an additional change detection run when its inputs change:\n * E.g.:\n * ```\n * <div>{{myModel.valid}}</div>\n * <input [(ngModel)]=\"myValue\" #myModel=\"ngModel\">\n * ```\n * I.e. `ngModel` can export itself on the element and then be used in the template.\n * Normally, this would result in expressions before the `input` that use the exported directive\n * to have and old value as they have been\n * dirty checked before. As this is a very common case for `ngModel`, we added this second change\n * detection run.\n *\n * Notes:\n * - this is just one extra run no matter how many `ngModel` have been changed.\n * - this is a general problem when using `exportAs` for directives!\n */\nconst resolvedPromise = (() => Promise.resolve(null))();\n\n/**\n * @description\n * Creates a `FormControl` instance from a domain model and binds it\n * to a form control element.\n *\n * The `FormControl` instance tracks the value, user interaction, and\n * validation status of the control and keeps the view synced with the model. If used\n * within a parent form, the directive also registers itself with the form as a child\n * control.\n *\n * This directive is used by itself or as part of a larger form. Use the\n * `ngModel` selector to activate it.\n *\n * It accepts a domain model as an optional `Input`. If you have a one-way binding\n * to `ngModel` with `[]` syntax, changing the value of the domain model in the component\n * class sets the value in the view. If you have a two-way binding with `[()]` syntax\n * (also known as 'banana-box syntax'), the value in the UI always syncs back to\n * the domain model in your class.\n *\n * To inspect the properties of the associated `FormControl` (like validity state),\n * export the directive into a local template variable using `ngModel` as the key (ex:\n * `#myVar=\"ngModel\"`). You then access the control using the directive's `control` property, but\n * most properties used (like `valid` and `dirty`) fall through to the control anyway for direct\n * access. See a full list of properties directly available in `AbstractControlDirective`.\n *\n * @see `RadioControlValueAccessor`\n * @see `SelectControlValueAccessor`\n *\n * @usageNotes\n *\n * ### Using ngModel on a standalone control\n *\n * The following examples show a simple standalone control using `ngModel`:\n *\n * {@example forms/ts/simpleNgModel/simple_ng_model_example.ts region='Component'}\n *\n * When using the `ngModel` within `<form>` tags, you'll also need to supply a `name` attribute\n * so that the control can be registered with the parent form under that name.\n *\n * In the context of a parent form, it's often unnecessary to include one-way or two-way binding,\n * as the parent form syncs the value for you. You access its properties by exporting it into a\n * local template variable using `ngForm` such as (`#f=\"ngForm\"`). Use the variable where\n * needed on form submission.\n *\n * If you do need to populate initial values into your form, using a one-way binding for\n * `ngModel` tends to be sufficient as long as you use the exported form's value rather\n * than the domain model's value on submit.\n *\n * ### Using ngModel within a form\n *\n * The following example shows controls using `ngModel` within a form:\n *\n * {@example forms/ts/simpleForm/simple_form_example.ts region='Component'}\n *\n * ### Using a standalone ngModel within a group\n *\n * The following example shows you how to use a standalone ngModel control\n * within a form. This controls the display of the form, but doesn't contain form data.\n *\n * ```html\n * <form>\n *   <input name=\"login\" ngModel placeholder=\"Login\">\n *   <input type=\"checkbox\" ngModel [ngModelOptions]=\"{standalone: true}\"> Show more options?\n * </form>\n * <!-- form value: {login: ''} -->\n * ```\n *\n * ### Setting the ngModel name attribute through options\n *\n * The following example shows you an alternate way to set the name attribute. The name attribute is\n * used within a custom form component, and the name `@Input` property serves a different purpose.\n *\n * ```html\n * <form>\n *   <my-person-control name=\"Nancy\" ngModel [ngModelOptions]=\"{name: 'user'}\">\n *   </my-person-control>\n * </form>\n * <!-- form value: {user: ''} -->\n * ```\n *\n * @ngModule FormsModule\n * @publicApi\n */\n@Directive({\n  selector: '[ngModel]:not([formControlName]):not([formControl])',\n  providers: [formControlBinding],\n  exportAs: 'ngModel'\n})\nexport class NgModel extends NgControl implements OnChanges, OnDestroy {\n  public readonly control: FormControl = new FormControl();\n\n  // At runtime we coerce arbitrary values assigned to the \"disabled\" input to a \"boolean\".\n  // This is not reflected in the type of the property because outside of templates, consumers\n  // should only deal with booleans. In templates, a string is allowed for convenience and to\n  // match the native \"disabled attribute\" semantics which can be observed on input elements.\n  // This static member tells the compiler that values of type \"string\" can also be assigned\n  // to the input in a template.\n  /** @nodoc */\n  static ngAcceptInputType_isDisabled: boolean|string;\n\n  /** @internal */\n  _registered = false;\n\n  /**\n   * Internal reference to the view model value.\n   * @nodoc\n   */\n  viewModel: any;\n\n  /**\n   * @description\n   * Tracks the name bound to the directive. The parent form\n   * uses this name as a key to retrieve this control's value.\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input() name!: string;\n\n  /**\n   * @description\n   * Tracks whether the control is disabled.\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input('disabled') isDisabled!: boolean;\n\n  /**\n   * @description\n   * Tracks the value bound to this directive.\n   */\n  @Input('ngModel') model: any;\n\n  /**\n   * @description\n   * Tracks the configuration options for this `ngModel` instance.\n   *\n   * **name**: An alternative to setting the name attribute on the form control element. See\n   * the [example](api/forms/NgModel#using-ngmodel-on-a-standalone-control) for using `NgModel`\n   * as a standalone control.\n   *\n   * **standalone**: When set to true, the `ngModel` will not register itself with its parent form,\n   * and acts as if it's not in the form. Defaults to false.\n   *\n   * **updateOn**: Defines the event upon which the form control value and validity update.\n   * Defaults to 'change'. Possible values: `'change'` | `'blur'` | `'submit'`.\n   *\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input('ngModelOptions') options!: {name?: string, standalone?: boolean, updateOn?: FormHooks};\n\n  /**\n   * @description\n   * Event emitter for producing the `ngModelChange` event after\n   * the view model updates.\n   */\n  @Output('ngModelChange') update = new EventEmitter();\n\n  constructor(\n      @Optional() @Host() parent: ControlContainer,\n      @Optional() @Self() @Inject(NG_VALIDATORS) validators: Array<Validator|ValidatorFn>,\n      @Optional() @Self() @Inject(NG_ASYNC_VALIDATORS) asyncValidators:\n          Array<AsyncValidator|AsyncValidatorFn>,\n      @Optional() @Self() @Inject(NG_VALUE_ACCESSOR) valueAccessors: ControlValueAccessor[]) {\n    super();\n    this._parent = parent;\n    this._rawValidators = validators || [];\n    this._rawAsyncValidators = asyncValidators || [];\n    this.valueAccessor = selectValueAccessor(this, valueAccessors);\n  }\n\n  /** @nodoc */\n  ngOnChanges(changes: SimpleChanges) {\n    this._checkForErrors();\n    if (!this._registered) this._setUpControl();\n    if ('isDisabled' in changes) {\n      this._updateDisabled(changes);\n    }\n\n    if (isPropertyUpdated(changes, this.viewModel)) {\n      this._updateValue(this.model);\n      this.viewModel = this.model;\n    }\n  }\n\n  /** @nodoc */\n  ngOnDestroy(): void {\n    this.formDirective && this.formDirective.removeControl(this);\n  }\n\n  /**\n   * @description\n   * Returns an array that represents the path from the top-level form to this control.\n   * Each index is the string name of the control on that level.\n   */\n  get path(): string[] {\n    return this._parent ? controlPath(this.name, this._parent) : [this.name];\n  }\n\n  /**\n   * @description\n   * The top-level directive for this control if present, otherwise null.\n   */\n  get formDirective(): any {\n    return this._parent ? this._parent.formDirective : null;\n  }\n\n  /**\n   * @description\n   * Synchronous validator function composed of all the synchronous validators\n   * registered with this directive.\n   */\n  get validator(): ValidatorFn|null {\n    return composeValidators(this._rawValidators);\n  }\n\n  /**\n   * @description\n   * Async validator function composed of all the async validators registered with this\n   * directive.\n   */\n  get asyncValidator(): AsyncValidatorFn|null {\n    return composeAsyncValidators(this._rawAsyncValidators);\n  }\n\n  /**\n   * @description\n   * Sets the new value for the view model and emits an `ngModelChange` event.\n   *\n   * @param newValue The new value emitted by `ngModelChange`.\n   */\n  viewToModelUpdate(newValue: any): void {\n    this.viewModel = newValue;\n    this.update.emit(newValue);\n  }\n\n  private _setUpControl(): void {\n    this._setUpdateStrategy();\n    this._isStandalone() ? this._setUpStandalone() : this.formDirective.addControl(this);\n    this._registered = true;\n  }\n\n  private _setUpdateStrategy(): void {\n    if (this.options && this.options.updateOn != null) {\n      this.control._updateOn = this.options.updateOn;\n    }\n  }\n\n  private _isStandalone(): boolean {\n    return !this._parent || !!(this.options && this.options.standalone);\n  }\n\n  private _setUpStandalone(): void {\n    setUpControl(this.control, this);\n    this.control.updateValueAndValidity({emitEvent: false});\n  }\n\n  private _checkForErrors(): void {\n    if (!this._isStandalone()) {\n      this._checkParentType();\n    }\n    this._checkName();\n  }\n\n  private _checkParentType(): void {\n    if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      if (!(this._parent instanceof NgModelGroup) &&\n          this._parent instanceof AbstractFormGroupDirective) {\n        TemplateDrivenErrors.formGroupNameException();\n      } else if (!(this._parent instanceof NgModelGroup) && !(this._parent instanceof NgForm)) {\n        TemplateDrivenErrors.modelParentException();\n      }\n    }\n  }\n\n  private _checkName(): void {\n    if (this.options && this.options.name) this.name = this.options.name;\n\n    if (!this._isStandalone() && !this.name && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      TemplateDrivenErrors.missingNameException();\n    }\n  }\n\n  private _updateValue(value: any): void {\n    resolvedPromise.then(() => {\n      this.control.setValue(value, {emitViewToModelChange: false});\n    });\n  }\n\n  private _updateDisabled(changes: SimpleChanges) {\n    const disabledValue = changes['isDisabled'].currentValue;\n\n    const isDisabled = disabledValue === '' || (disabledValue && disabledValue !== 'false');\n\n    resolvedPromise.then(() => {\n      if (isDisabled && !this.control.disabled) {\n        this.control.disable();\n      } else if (!isDisabled && this.control.disabled) {\n        this.control.enable();\n      }\n    });\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive} from '@angular/core';\n\n/**\n * @description\n *\n * Adds `novalidate` attribute to all forms by default.\n *\n * `novalidate` is used to disable browser's native form validation.\n *\n * If you want to use native validation with Angular forms, just add `ngNativeValidate` attribute:\n *\n * ```\n * <form ngNativeValidate></form>\n * ```\n *\n * @publicApi\n * @ngModule ReactiveFormsModule\n * @ngModule FormsModule\n */\n@Directive({\n  selector: 'form:not([ngNoForm]):not([ngNativeValidate])',\n  host: {'novalidate': ''},\n})\nexport class ɵNgNoValidate {\n}\n\nexport {ɵNgNoValidate as NgNoValidate};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, EventEmitter, forwardRef, Inject, InjectionToken, Input, OnChanges, Optional, Output, Self, SimpleChanges} from '@angular/core';\n\nimport {FormControl} from '../../model';\nimport {NG_ASYNC_VALIDATORS, NG_VALIDATORS} from '../../validators';\nimport {ControlValueAccessor, NG_VALUE_ACCESSOR} from '../control_value_accessor';\nimport {NgControl} from '../ng_control';\nimport {ReactiveErrors} from '../reactive_errors';\nimport {_ngModelWarning, composeAsyncValidators, composeValidators, isPropertyUpdated, selectValueAccessor, setUpControl} from '../shared';\nimport {AsyncValidator, AsyncValidatorFn, Validator, ValidatorFn} from '../validators';\n\n\n/**\n * Token to provide to turn off the ngModel warning on formControl and formControlName.\n */\nexport const NG_MODEL_WITH_FORM_CONTROL_WARNING =\n    new InjectionToken('NgModelWithFormControlWarning');\n\nexport const formControlBinding: any = {\n  provide: NgControl,\n  useExisting: forwardRef(() => FormControlDirective)\n};\n\n/**\n * @description\n * Synchronizes a standalone `FormControl` instance to a form control element.\n *\n * Note that support for using the `ngModel` input property and `ngModelChange` event with reactive\n * form directives was deprecated in Angular v6 and is scheduled for removal in\n * a future version of Angular.\n * For details, see [Deprecated features](guide/deprecations#ngmodel-with-reactive-forms).\n *\n * @see [Reactive Forms Guide](guide/reactive-forms)\n * @see `FormControl`\n * @see `AbstractControl`\n *\n * @usageNotes\n *\n * The following example shows how to register a standalone control and set its value.\n *\n * {@example forms/ts/simpleFormControl/simple_form_control_example.ts region='Component'}\n *\n * @ngModule ReactiveFormsModule\n * @publicApi\n */\n@Directive({selector: '[formControl]', providers: [formControlBinding], exportAs: 'ngForm'})\n\nexport class FormControlDirective extends NgControl implements OnChanges {\n  /**\n   * Internal reference to the view model value.\n   * @nodoc\n   */\n  viewModel: any;\n\n  /**\n   * @description\n   * Tracks the `FormControl` instance bound to the directive.\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input('formControl') form!: FormControl;\n\n  /**\n   * @description\n   * Triggers a warning in dev mode that this input should not be used with reactive forms.\n   */\n  @Input('disabled')\n  set isDisabled(isDisabled: boolean) {\n    if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      ReactiveErrors.disabledAttrWarning();\n    }\n  }\n\n  // TODO(kara): remove next 4 properties once deprecation period is over\n\n  /** @deprecated as of v6 */\n  @Input('ngModel') model: any;\n\n  /** @deprecated as of v6 */\n  @Output('ngModelChange') update = new EventEmitter();\n\n  /**\n   * @description\n   * Static property used to track whether any ngModel warnings have been sent across\n   * all instances of FormControlDirective. Used to support warning config of \"once\".\n   *\n   * @internal\n   */\n  static _ngModelWarningSentOnce = false;\n\n  /**\n   * @description\n   * Instance property used to track whether an ngModel warning has been sent out for this\n   * particular `FormControlDirective` instance. Used to support warning config of \"always\".\n   *\n   * @internal\n   */\n  _ngModelWarningSent = false;\n\n  constructor(\n      @Optional() @Self() @Inject(NG_VALIDATORS) validators: Array<Validator|ValidatorFn>,\n      @Optional() @Self() @Inject(NG_ASYNC_VALIDATORS) asyncValidators:\n          Array<AsyncValidator|AsyncValidatorFn>,\n      @Optional() @Self() @Inject(NG_VALUE_ACCESSOR) valueAccessors: ControlValueAccessor[],\n      @Optional() @Inject(NG_MODEL_WITH_FORM_CONTROL_WARNING) private _ngModelWarningConfig: string|\n      null) {\n    super();\n    this._rawValidators = validators || [];\n    this._rawAsyncValidators = asyncValidators || [];\n    this.valueAccessor = selectValueAccessor(this, valueAccessors);\n  }\n\n  /** @nodoc */\n  ngOnChanges(changes: SimpleChanges): void {\n    if (this._isControlChanged(changes)) {\n      setUpControl(this.form, this);\n      if (this.control.disabled && this.valueAccessor!.setDisabledState) {\n        this.valueAccessor!.setDisabledState!(true);\n      }\n      this.form.updateValueAndValidity({emitEvent: false});\n    }\n    if (isPropertyUpdated(changes, this.viewModel)) {\n      _ngModelWarning('formControl', FormControlDirective, this, this._ngModelWarningConfig);\n      this.form.setValue(this.model);\n      this.viewModel = this.model;\n    }\n  }\n\n  /**\n   * @description\n   * Returns an array that represents the path from the top-level form to this control.\n   * Each index is the string name of the control on that level.\n   */\n  get path(): string[] {\n    return [];\n  }\n\n  /**\n   * @description\n   * Synchronous validator function composed of all the synchronous validators\n   * registered with this directive.\n   */\n  get validator(): ValidatorFn|null {\n    return composeValidators(this._rawValidators);\n  }\n\n  /**\n   * @description\n   * Async validator function composed of all the async validators registered with this\n   * directive.\n   */\n  get asyncValidator(): AsyncValidatorFn|null {\n    return composeAsyncValidators(this._rawAsyncValidators);\n  }\n\n  /**\n   * @description\n   * The `FormControl` bound to this directive.\n   */\n  get control(): FormControl {\n    return this.form;\n  }\n\n  /**\n   * @description\n   * Sets the new value for the view model and emits an `ngModelChange` event.\n   *\n   * @param newValue The new value for the view model.\n   */\n  viewToModelUpdate(newValue: any): void {\n    this.viewModel = newValue;\n    this.update.emit(newValue);\n  }\n\n  private _isControlChanged(changes: {[key: string]: any}): boolean {\n    return changes.hasOwnProperty('form');\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, EventEmitter, forwardRef, Inject, Input, OnChanges, Optional, Output, Self, SimpleChanges} from '@angular/core';\n\nimport {FormArray, FormControl, FormGroup} from '../../model';\nimport {NG_ASYNC_VALIDATORS, NG_VALIDATORS, Validators} from '../../validators';\nimport {ControlContainer} from '../control_container';\nimport {Form} from '../form_interface';\nimport {ReactiveErrors} from '../reactive_errors';\nimport {cleanUpControl, composeAsyncValidators, composeValidators, removeDir, setUpControl, setUpFormContainer, syncPendingControls} from '../shared';\n\nimport {FormControlName} from './form_control_name';\nimport {FormArrayName, FormGroupName} from './form_group_name';\n\nexport const formDirectiveProvider: any = {\n  provide: ControlContainer,\n  useExisting: forwardRef(() => FormGroupDirective)\n};\n\n/**\n * @description\n *\n * Binds an existing `FormGroup` to a DOM element.\n *\n * This directive accepts an existing `FormGroup` instance. It will then use this\n * `FormGroup` instance to match any child `FormControl`, `FormGroup`,\n * and `FormArray` instances to child `FormControlName`, `FormGroupName`,\n * and `FormArrayName` directives.\n *\n * @see [Reactive Forms Guide](guide/reactive-forms)\n * @see `AbstractControl`\n *\n * ### Register Form Group\n *\n * The following example registers a `FormGroup` with first name and last name controls,\n * and listens for the *ngSubmit* event when the button is clicked.\n *\n * {@example forms/ts/simpleFormGroup/simple_form_group_example.ts region='Component'}\n *\n * @ngModule ReactiveFormsModule\n * @publicApi\n */\n@Directive({\n  selector: '[formGroup]',\n  providers: [formDirectiveProvider],\n  host: {'(submit)': 'onSubmit($event)', '(reset)': 'onReset()'},\n  exportAs: 'ngForm'\n})\nexport class FormGroupDirective extends ControlContainer implements Form, OnChanges {\n  /**\n   * @description\n   * Reports whether the form submission has been triggered.\n   */\n  public readonly submitted: boolean = false;\n\n  // TODO(issue/24571): remove '!'.\n  private _oldForm!: FormGroup;\n\n  /**\n   * @description\n   * Tracks the list of added `FormControlName` instances\n   */\n  directives: FormControlName[] = [];\n\n  /**\n   * @description\n   * Tracks the `FormGroup` bound to this directive.\n   */\n  @Input('formGroup') form: FormGroup = null!;\n\n  /**\n   * @description\n   * Emits an event when the form submission has been triggered.\n   */\n  @Output() ngSubmit = new EventEmitter();\n\n  constructor(\n      @Optional() @Self() @Inject(NG_VALIDATORS) private _validators: any[],\n      @Optional() @Self() @Inject(NG_ASYNC_VALIDATORS) private _asyncValidators: any[]) {\n    super();\n  }\n\n  /** @nodoc */\n  ngOnChanges(changes: SimpleChanges): void {\n    this._checkFormPresent();\n    if (changes.hasOwnProperty('form')) {\n      this._updateValidators();\n      this._updateDomValue();\n      this._updateRegistrations();\n    }\n  }\n\n  /**\n   * @description\n   * Returns this directive's instance.\n   */\n  get formDirective(): Form {\n    return this;\n  }\n\n  /**\n   * @description\n   * Returns the `FormGroup` bound to this directive.\n   */\n  get control(): FormGroup {\n    return this.form;\n  }\n\n  /**\n   * @description\n   * Returns an array representing the path to this group. Because this directive\n   * always lives at the top level of a form, it always an empty array.\n   */\n  get path(): string[] {\n    return [];\n  }\n\n  /**\n   * @description\n   * Method that sets up the control directive in this group, re-calculates its value\n   * and validity, and adds the instance to the internal list of directives.\n   *\n   * @param dir The `FormControlName` directive instance.\n   */\n  addControl(dir: FormControlName): FormControl {\n    const ctrl: any = this.form.get(dir.path);\n    setUpControl(ctrl, dir);\n    ctrl.updateValueAndValidity({emitEvent: false});\n    this.directives.push(dir);\n    return ctrl;\n  }\n\n  /**\n   * @description\n   * Retrieves the `FormControl` instance from the provided `FormControlName` directive\n   *\n   * @param dir The `FormControlName` directive instance.\n   */\n  getControl(dir: FormControlName): FormControl {\n    return <FormControl>this.form.get(dir.path);\n  }\n\n  /**\n   * @description\n   * Removes the `FormControlName` instance from the internal list of directives\n   *\n   * @param dir The `FormControlName` directive instance.\n   */\n  removeControl(dir: FormControlName): void {\n    removeDir<FormControlName>(this.directives, dir);\n  }\n\n  /**\n   * Adds a new `FormGroupName` directive instance to the form.\n   *\n   * @param dir The `FormGroupName` directive instance.\n   */\n  addFormGroup(dir: FormGroupName): void {\n    const ctrl: any = this.form.get(dir.path);\n    setUpFormContainer(ctrl, dir);\n    ctrl.updateValueAndValidity({emitEvent: false});\n  }\n\n  /**\n   * No-op method to remove the form group.\n   *\n   * @param dir The `FormGroupName` directive instance.\n   */\n  removeFormGroup(dir: FormGroupName): void {}\n\n  /**\n   * @description\n   * Retrieves the `FormGroup` for a provided `FormGroupName` directive instance\n   *\n   * @param dir The `FormGroupName` directive instance.\n   */\n  getFormGroup(dir: FormGroupName): FormGroup {\n    return <FormGroup>this.form.get(dir.path);\n  }\n\n  /**\n   * Adds a new `FormArrayName` directive instance to the form.\n   *\n   * @param dir The `FormArrayName` directive instance.\n   */\n  addFormArray(dir: FormArrayName): void {\n    const ctrl: any = this.form.get(dir.path);\n    setUpFormContainer(ctrl, dir);\n    ctrl.updateValueAndValidity({emitEvent: false});\n  }\n\n  /**\n   * No-op method to remove the form array.\n   *\n   * @param dir The `FormArrayName` directive instance.\n   */\n  removeFormArray(dir: FormArrayName): void {}\n\n  /**\n   * @description\n   * Retrieves the `FormArray` for a provided `FormArrayName` directive instance.\n   *\n   * @param dir The `FormArrayName` directive instance.\n   */\n  getFormArray(dir: FormArrayName): FormArray {\n    return <FormArray>this.form.get(dir.path);\n  }\n\n  /**\n   * Sets the new value for the provided `FormControlName` directive.\n   *\n   * @param dir The `FormControlName` directive instance.\n   * @param value The new value for the directive's control.\n   */\n  updateModel(dir: FormControlName, value: any): void {\n    const ctrl  = <FormControl>this.form.get(dir.path);\n    ctrl.setValue(value);\n  }\n\n  /**\n   * @description\n   * Method called with the \"submit\" event is triggered on the form.\n   * Triggers the `ngSubmit` emitter to emit the \"submit\" event as its payload.\n   *\n   * @param $event The \"submit\" event object\n   */\n  onSubmit($event: Event): boolean {\n    (this as {submitted: boolean}).submitted = true;\n    syncPendingControls(this.form, this.directives);\n    this.ngSubmit.emit($event);\n    return false;\n  }\n\n  /**\n   * @description\n   * Method called when the \"reset\" event is triggered on the form.\n   */\n  onReset(): void {\n    this.resetForm();\n  }\n\n  /**\n   * @description\n   * Resets the form to an initial value and resets its submitted status.\n   *\n   * @param value The new value for the form.\n   */\n  resetForm(value: any = undefined): void {\n    this.form.reset(value);\n    (this as {submitted: boolean}).submitted = false;\n  }\n\n\n  /** @internal */\n  _updateDomValue() {\n    this.directives.forEach(dir => {\n      const newCtrl: any = this.form.get(dir.path);\n      if (dir.control !== newCtrl) {\n        cleanUpControl(dir.control, dir);\n        if (newCtrl) setUpControl(newCtrl, dir);\n        (dir as {control: FormControl}).control = newCtrl;\n      }\n    });\n\n    this.form._updateTreeValidity({emitEvent: false});\n  }\n\n  private _updateRegistrations() {\n    this.form._registerOnCollectionChange(() => this._updateDomValue());\n    if (this._oldForm) this._oldForm._registerOnCollectionChange(() => {});\n    this._oldForm = this.form;\n  }\n\n  private _updateValidators() {\n    const sync = composeValidators(this._validators);\n    this.form.validator = Validators.compose([this.form.validator!, sync!]);\n\n    const async = composeAsyncValidators(this._asyncValidators);\n    this.form.asyncValidator = Validators.composeAsync([this.form.asyncValidator!, async!]);\n  }\n\n  private _checkFormPresent() {\n    if (!this.form && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      ReactiveErrors.missingFormException();\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, forwardRef, Host, Inject, Input, OnDestroy, OnInit, Optional, Self, SkipSelf} from '@angular/core';\n\nimport {FormArray} from '../../model';\nimport {NG_ASYNC_VALIDATORS, NG_VALIDATORS} from '../../validators';\nimport {AbstractFormGroupDirective} from '../abstract_form_group_directive';\nimport {ControlContainer} from '../control_container';\nimport {ReactiveErrors} from '../reactive_errors';\nimport {composeAsyncValidators, composeValidators, controlPath} from '../shared';\nimport {AsyncValidatorFn, ValidatorFn} from '../validators';\n\nimport {FormGroupDirective} from './form_group_directive';\n\nexport const formGroupNameProvider: any = {\n  provide: ControlContainer,\n  useExisting: forwardRef(() => FormGroupName)\n};\n\n/**\n * @description\n *\n * Syncs a nested `FormGroup` to a DOM element.\n *\n * This directive can only be used with a parent `FormGroupDirective`.\n *\n * It accepts the string name of the nested `FormGroup` to link, and\n * looks for a `FormGroup` registered with that name in the parent\n * `FormGroup` instance you passed into `FormGroupDirective`.\n *\n * Use nested form groups to validate a sub-group of a\n * form separately from the rest or to group the values of certain\n * controls into their own nested object.\n *\n * @see [Reactive Forms Guide](guide/reactive-forms)\n *\n * @usageNotes\n *\n * ### Access the group by name\n *\n * The following example uses the {@link AbstractControl#get get} method to access the\n * associated `FormGroup`\n *\n * ```ts\n *   this.form.get('name');\n * ```\n *\n * ### Access individual controls in the group\n *\n * The following example uses the {@link AbstractControl#get get} method to access\n * individual controls within the group using dot syntax.\n *\n * ```ts\n *   this.form.get('name.first');\n * ```\n *\n * ### Register a nested `FormGroup`.\n *\n * The following example registers a nested *name* `FormGroup` within an existing `FormGroup`,\n * and provides methods to retrieve the nested `FormGroup` and individual controls.\n *\n * {@example forms/ts/nestedFormGroup/nested_form_group_example.ts region='Component'}\n *\n * @ngModule ReactiveFormsModule\n * @publicApi\n */\n@Directive({selector: '[formGroupName]', providers: [formGroupNameProvider]})\nexport class FormGroupName extends AbstractFormGroupDirective implements OnInit, OnDestroy {\n  /**\n   * @description\n   * Tracks the name of the `FormGroup` bound to the directive. The name corresponds\n   * to a key in the parent `FormGroup` or `FormArray`.\n   * Accepts a name as a string or a number.\n   * The name in the form of a string is useful for individual forms,\n   * while the numerical form allows for form groups to be bound\n   * to indices when iterating over groups in a `FormArray`.\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input('formGroupName') name!: string|number|null;\n\n  constructor(\n      @Optional() @Host() @SkipSelf() parent: ControlContainer,\n      @Optional() @Self() @Inject(NG_VALIDATORS) validators: any[],\n      @Optional() @Self() @Inject(NG_ASYNC_VALIDATORS) asyncValidators: any[]) {\n    super();\n    this._parent = parent;\n    this._validators = validators;\n    this._asyncValidators = asyncValidators;\n  }\n\n  /** @internal */\n  _checkParentType(): void {\n    if (_hasInvalidParent(this._parent) && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      ReactiveErrors.groupParentException();\n    }\n  }\n}\n\nexport const formArrayNameProvider: any = {\n  provide: ControlContainer,\n  useExisting: forwardRef(() => FormArrayName)\n};\n\n/**\n * @description\n *\n * Syncs a nested `FormArray` to a DOM element.\n *\n * This directive is designed to be used with a parent `FormGroupDirective` (selector:\n * `[formGroup]`).\n *\n * It accepts the string name of the nested `FormArray` you want to link, and\n * will look for a `FormArray` registered with that name in the parent\n * `FormGroup` instance you passed into `FormGroupDirective`.\n *\n * @see [Reactive Forms Guide](guide/reactive-forms)\n * @see `AbstractControl`\n *\n * @usageNotes\n *\n * ### Example\n *\n * {@example forms/ts/nestedFormArray/nested_form_array_example.ts region='Component'}\n *\n * @ngModule ReactiveFormsModule\n * @publicApi\n */\n@Directive({selector: '[formArrayName]', providers: [formArrayNameProvider]})\nexport class FormArrayName extends ControlContainer implements OnInit, OnDestroy {\n  /** @internal */\n  _parent: ControlContainer;\n\n  /** @internal */\n  _validators: any[];\n\n  /** @internal */\n  _asyncValidators: any[];\n\n  /**\n   * @description\n   * Tracks the name of the `FormArray` bound to the directive. The name corresponds\n   * to a key in the parent `FormGroup` or `FormArray`.\n   * Accepts a name as a string or a number.\n   * The name in the form of a string is useful for individual forms,\n   * while the numerical form allows for form arrays to be bound\n   * to indices when iterating over arrays in a `FormArray`.\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input('formArrayName') name!: string|number|null;\n\n  constructor(\n      @Optional() @Host() @SkipSelf() parent: ControlContainer,\n      @Optional() @Self() @Inject(NG_VALIDATORS) validators: any[],\n      @Optional() @Self() @Inject(NG_ASYNC_VALIDATORS) asyncValidators: any[]) {\n    super();\n    this._parent = parent;\n    this._validators = validators;\n    this._asyncValidators = asyncValidators;\n  }\n\n  /**\n   * A lifecycle method called when the directive's inputs are initialized. For internal use only.\n   * @throws If the directive does not have a valid parent.\n   * @nodoc\n   */\n  ngOnInit(): void {\n    this._checkParentType();\n    this.formDirective!.addFormArray(this);\n  }\n\n  /**\n   * A lifecycle method called before the directive's instance is destroyed. For internal use only.\n   * @nodoc\n   */\n  ngOnDestroy(): void {\n    if (this.formDirective) {\n      this.formDirective.removeFormArray(this);\n    }\n  }\n\n  /**\n   * @description\n   * The `FormArray` bound to this directive.\n   */\n  get control(): FormArray {\n    return this.formDirective!.getFormArray(this);\n  }\n\n  /**\n   * @description\n   * The top-level directive for this group if present, otherwise null.\n   */\n  get formDirective(): FormGroupDirective|null {\n    return this._parent ? <FormGroupDirective>this._parent.formDirective : null;\n  }\n\n  /**\n   * @description\n   * Returns an array that represents the path from the top-level form to this control.\n   * Each index is the string name of the control on that level.\n   */\n  get path(): string[] {\n    return controlPath(this.name == null ? this.name : this.name.toString(), this._parent);\n  }\n\n  /**\n   * @description\n   * Synchronous validator function composed of all the synchronous validators registered with this\n   * directive.\n   */\n  get validator(): ValidatorFn|null {\n    return composeValidators(this._validators);\n  }\n\n  /**\n   * @description\n   * Async validator function composed of all the async validators registered with this directive.\n   */\n  get asyncValidator(): AsyncValidatorFn|null {\n    return composeAsyncValidators(this._asyncValidators);\n  }\n\n  private _checkParentType(): void {\n    if (_hasInvalidParent(this._parent) && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      ReactiveErrors.arrayParentException();\n    }\n  }\n}\n\nfunction _hasInvalidParent(parent: ControlContainer): boolean {\n  return !(parent instanceof FormGroupName) && !(parent instanceof FormGroupDirective) &&\n      !(parent instanceof FormArrayName);\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, EventEmitter, forwardRef, Host, Inject, Input, OnChanges, OnDestroy, Optional, Output, Self, SimpleChanges, SkipSelf} from '@angular/core';\n\nimport {FormControl} from '../../model';\nimport {NG_ASYNC_VALIDATORS, NG_VALIDATORS} from '../../validators';\nimport {AbstractFormGroupDirective} from '../abstract_form_group_directive';\nimport {ControlContainer} from '../control_container';\nimport {ControlValueAccessor, NG_VALUE_ACCESSOR} from '../control_value_accessor';\nimport {NgControl} from '../ng_control';\nimport {ReactiveErrors} from '../reactive_errors';\nimport {_ngModelWarning, composeAsyncValidators, composeValidators, controlPath, isPropertyUpdated, selectValueAccessor} from '../shared';\nimport {AsyncValidator, AsyncValidatorFn, Validator, ValidatorFn} from '../validators';\n\nimport {NG_MODEL_WITH_FORM_CONTROL_WARNING} from './form_control_directive';\nimport {FormGroupDirective} from './form_group_directive';\nimport {FormArrayName, FormGroupName} from './form_group_name';\n\nexport const controlNameBinding: any = {\n  provide: NgControl,\n  useExisting: forwardRef(() => FormControlName)\n};\n\n/**\n * @description\n * Syncs a `FormControl` in an existing `FormGroup` to a form control\n * element by name.\n *\n * @see [Reactive Forms Guide](guide/reactive-forms)\n * @see `FormControl`\n * @see `AbstractControl`\n *\n * @usageNotes\n *\n * ### Register `FormControl` within a group\n *\n * The following example shows how to register multiple form controls within a form group\n * and set their value.\n *\n * {@example forms/ts/simpleFormGroup/simple_form_group_example.ts region='Component'}\n *\n * To see `formControlName` examples with different form control types, see:\n *\n * * Radio buttons: `RadioControlValueAccessor`\n * * Selects: `SelectControlValueAccessor`\n *\n * ### Use with ngModel is deprecated\n *\n * Support for using the `ngModel` input property and `ngModelChange` event with reactive\n * form directives has been deprecated in Angular v6 and is scheduled for removal in\n * a future version of Angular.\n *\n * For details, see [Deprecated features](guide/deprecations#ngmodel-with-reactive-forms).\n *\n * @ngModule ReactiveFormsModule\n * @publicApi\n */\n@Directive({selector: '[formControlName]', providers: [controlNameBinding]})\nexport class FormControlName extends NgControl implements OnChanges, OnDestroy {\n  private _added = false;\n  /**\n   * Internal reference to the view model value.\n   * @internal\n   */\n  viewModel: any;\n\n  /**\n   * @description\n   * Tracks the `FormControl` instance bound to the directive.\n   */\n  // TODO(issue/24571): remove '!'.\n  readonly control!: FormControl;\n\n  /**\n   * @description\n   * Tracks the name of the `FormControl` bound to the directive. The name corresponds\n   * to a key in the parent `FormGroup` or `FormArray`.\n   * Accepts a name as a string or a number.\n   * The name in the form of a string is useful for individual forms,\n   * while the numerical form allows for form controls to be bound\n   * to indices when iterating over controls in a `FormArray`.\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input('formControlName') name!: string|number|null;\n\n  /**\n   * @description\n   * Triggers a warning in dev mode that this input should not be used with reactive forms.\n   */\n  @Input('disabled')\n  set isDisabled(isDisabled: boolean) {\n    if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      ReactiveErrors.disabledAttrWarning();\n    }\n  }\n\n  // TODO(kara): remove next 4 properties once deprecation period is over\n\n  /** @deprecated as of v6 */\n  @Input('ngModel') model: any;\n\n  /** @deprecated as of v6 */\n  @Output('ngModelChange') update = new EventEmitter();\n\n  /**\n   * @description\n   * Static property used to track whether any ngModel warnings have been sent across\n   * all instances of FormControlName. Used to support warning config of \"once\".\n   *\n   * @internal\n   */\n  static _ngModelWarningSentOnce = false;\n\n  /**\n   * @description\n   * Instance property used to track whether an ngModel warning has been sent out for this\n   * particular FormControlName instance. Used to support warning config of \"always\".\n   *\n   * @internal\n   */\n  _ngModelWarningSent = false;\n\n  constructor(\n      @Optional() @Host() @SkipSelf() parent: ControlContainer,\n      @Optional() @Self() @Inject(NG_VALIDATORS) validators: Array<Validator|ValidatorFn>,\n      @Optional() @Self() @Inject(NG_ASYNC_VALIDATORS) asyncValidators:\n          Array<AsyncValidator|AsyncValidatorFn>,\n      @Optional() @Self() @Inject(NG_VALUE_ACCESSOR) valueAccessors: ControlValueAccessor[],\n      @Optional() @Inject(NG_MODEL_WITH_FORM_CONTROL_WARNING) private _ngModelWarningConfig: string|\n      null) {\n    super();\n    this._parent = parent;\n    this._rawValidators = validators || [];\n    this._rawAsyncValidators = asyncValidators || [];\n    this.valueAccessor = selectValueAccessor(this, valueAccessors);\n  }\n\n  /** @nodoc */\n  ngOnChanges(changes: SimpleChanges) {\n    if (!this._added) this._setUpControl();\n    if (isPropertyUpdated(changes, this.viewModel)) {\n      _ngModelWarning('formControlName', FormControlName, this, this._ngModelWarningConfig);\n      this.viewModel = this.model;\n      this.formDirective.updateModel(this, this.model);\n    }\n  }\n\n  /** @nodoc */\n  ngOnDestroy(): void {\n    if (this.formDirective) {\n      this.formDirective.removeControl(this);\n    }\n  }\n\n  /**\n   * @description\n   * Sets the new value for the view model and emits an `ngModelChange` event.\n   *\n   * @param newValue The new value for the view model.\n   */\n  viewToModelUpdate(newValue: any): void {\n    this.viewModel = newValue;\n    this.update.emit(newValue);\n  }\n\n  /**\n   * @description\n   * Returns an array that represents the path from the top-level form to this control.\n   * Each index is the string name of the control on that level.\n   */\n  get path(): string[] {\n    return controlPath(this.name == null ? this.name : this.name.toString(), this._parent!);\n  }\n\n  /**\n   * @description\n   * The top-level directive for this group if present, otherwise null.\n   */\n  get formDirective(): any {\n    return this._parent ? this._parent.formDirective : null;\n  }\n\n  /**\n   * @description\n   * Synchronous validator function composed of all the synchronous validators\n   * registered with this directive.\n   */\n  get validator(): ValidatorFn|null {\n    return composeValidators(this._rawValidators);\n  }\n\n  /**\n   * @description\n   * Async validator function composed of all the async validators registered with this\n   * directive.\n   */\n  get asyncValidator(): AsyncValidatorFn {\n    return composeAsyncValidators(this._rawAsyncValidators)!;\n  }\n\n  private _checkParentType(): void {\n    if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      if (!(this._parent instanceof FormGroupName) &&\n          this._parent instanceof AbstractFormGroupDirective) {\n        ReactiveErrors.ngModelGroupException();\n      } else if (\n          !(this._parent instanceof FormGroupName) &&\n          !(this._parent instanceof FormGroupDirective) &&\n          !(this._parent instanceof FormArrayName)) {\n        ReactiveErrors.controlParentException();\n      }\n    }\n  }\n\n  private _setUpControl() {\n    this._checkParentType();\n    (this as {control: FormControl}).control = this.formDirective.addControl(this);\n    if (this.control.disabled && this.valueAccessor!.setDisabledState) {\n      this.valueAccessor!.setDisabledState!(true);\n    }\n    this._added = true;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, forwardRef, Input, OnChanges, SimpleChanges, StaticProvider} from '@angular/core';\nimport {Observable} from 'rxjs';\n\nimport {AbstractControl} from '../model';\nimport {NG_VALIDATORS, Validators} from '../validators';\n\n\n/**\n * @description\n * Defines the map of errors returned from failed validation checks.\n *\n * @publicApi\n */\nexport type ValidationErrors = {\n  [key: string]: any\n};\n\n/**\n * @description\n * An interface implemented by classes that perform synchronous validation.\n *\n * @usageNotes\n *\n * ### Provide a custom validator\n *\n * The following example implements the `Validator` interface to create a\n * validator directive with a custom error key.\n *\n * ```typescript\n * @Directive({\n *   selector: '[customValidator]',\n *   providers: [{provide: NG_VALIDATORS, useExisting: CustomValidatorDirective, multi: true}]\n * })\n * class CustomValidatorDirective implements Validator {\n *   validate(control: AbstractControl): ValidationErrors|null {\n *     return {'custom': true};\n *   }\n * }\n * ```\n *\n * @publicApi\n */\nexport interface Validator {\n  /**\n   * @description\n   * Method that performs synchronous validation against the provided control.\n   *\n   * @param control The control to validate against.\n   *\n   * @returns A map of validation errors if validation fails,\n   * otherwise null.\n   */\n  validate(control: AbstractControl): ValidationErrors|null;\n\n  /**\n   * @description\n   * Registers a callback function to call when the validator inputs change.\n   *\n   * @param fn The callback function\n   */\n  registerOnValidatorChange?(fn: () => void): void;\n}\n\n/**\n * @description\n * An interface implemented by classes that perform asynchronous validation.\n *\n * @usageNotes\n *\n * ### Provide a custom async validator directive\n *\n * The following example implements the `AsyncValidator` interface to create an\n * async validator directive with a custom error key.\n *\n * ```typescript\n * import { of } from 'rxjs';\n *\n * @Directive({\n *   selector: '[customAsyncValidator]',\n *   providers: [{provide: NG_ASYNC_VALIDATORS, useExisting: CustomAsyncValidatorDirective, multi:\n * true}]\n * })\n * class CustomAsyncValidatorDirective implements AsyncValidator {\n *   validate(control: AbstractControl): Observable<ValidationErrors|null> {\n *     return of({'custom': true});\n *   }\n * }\n * ```\n *\n * @publicApi\n */\nexport interface AsyncValidator extends Validator {\n  /**\n   * @description\n   * Method that performs async validation against the provided control.\n   *\n   * @param control The control to validate against.\n   *\n   * @returns A promise or observable that resolves a map of validation errors\n   * if validation fails, otherwise null.\n   */\n  validate(control: AbstractControl):\n      Promise<ValidationErrors|null>|Observable<ValidationErrors|null>;\n}\n\n/**\n * @description\n * Provider which adds `RequiredValidator` to the `NG_VALIDATORS` multi-provider list.\n */\nexport const REQUIRED_VALIDATOR: StaticProvider = {\n  provide: NG_VALIDATORS,\n  useExisting: forwardRef(() => RequiredValidator),\n  multi: true\n};\n\n/**\n * @description\n * Provider which adds `CheckboxRequiredValidator` to the `NG_VALIDATORS` multi-provider list.\n */\nexport const CHECKBOX_REQUIRED_VALIDATOR: StaticProvider = {\n  provide: NG_VALIDATORS,\n  useExisting: forwardRef(() => CheckboxRequiredValidator),\n  multi: true\n};\n\n\n/**\n * @description\n * A directive that adds the `required` validator to any controls marked with the\n * `required` attribute. The directive is provided with the `NG_VALIDATORS` multi-provider list.\n *\n * @see [Form Validation](guide/form-validation)\n *\n * @usageNotes\n *\n * ### Adding a required validator using template-driven forms\n *\n * ```\n * <input name=\"fullName\" ngModel required>\n * ```\n *\n * @ngModule FormsModule\n * @ngModule ReactiveFormsModule\n * @publicApi\n */\n@Directive({\n  selector:\n      ':not([type=checkbox])[required][formControlName],:not([type=checkbox])[required][formControl],:not([type=checkbox])[required][ngModel]',\n  providers: [REQUIRED_VALIDATOR],\n  host: {'[attr.required]': 'required ? \"\" : null'}\n})\nexport class RequiredValidator implements Validator {\n  private _required = false;\n  private _onChange?: () => void;\n\n  /**\n   * @description\n   * Tracks changes to the required attribute bound to this directive.\n   */\n  @Input()\n  get required(): boolean|string {\n    return this._required;\n  }\n\n  set required(value: boolean|string) {\n    this._required = value != null && value !== false && `${value}` !== 'false';\n    if (this._onChange) this._onChange();\n  }\n\n  /**\n   * Method that validates whether the control is empty.\n   * Returns the validation result if enabled, otherwise null.\n   * @nodoc\n   */\n  validate(control: AbstractControl): ValidationErrors|null {\n    return this.required ? Validators.required(control) : null;\n  }\n\n  /**\n   * Registers a callback function to call when the validator inputs change.\n   * @nodoc\n   */\n  registerOnValidatorChange(fn: () => void): void {\n    this._onChange = fn;\n  }\n}\n\n\n/**\n * A Directive that adds the `required` validator to checkbox controls marked with the\n * `required` attribute. The directive is provided with the `NG_VALIDATORS` multi-provider list.\n *\n * @see [Form Validation](guide/form-validation)\n *\n * @usageNotes\n *\n * ### Adding a required checkbox validator using template-driven forms\n *\n * The following example shows how to add a checkbox required validator to an input attached to an\n * ngModel binding.\n *\n * ```\n * <input type=\"checkbox\" name=\"active\" ngModel required>\n * ```\n *\n * @publicApi\n * @ngModule FormsModule\n * @ngModule ReactiveFormsModule\n */\n@Directive({\n  selector:\n      'input[type=checkbox][required][formControlName],input[type=checkbox][required][formControl],input[type=checkbox][required][ngModel]',\n  providers: [CHECKBOX_REQUIRED_VALIDATOR],\n  host: {'[attr.required]': 'required ? \"\" : null'}\n})\nexport class CheckboxRequiredValidator extends RequiredValidator {\n  /**\n   * Method that validates whether or not the checkbox has been checked.\n   * Returns the validation result if enabled, otherwise null.\n   * @nodoc\n   */\n  validate(control: AbstractControl): ValidationErrors|null {\n    return this.required ? Validators.requiredTrue(control) : null;\n  }\n}\n\n/**\n * @description\n * Provider which adds `EmailValidator` to the `NG_VALIDATORS` multi-provider list.\n */\nexport const EMAIL_VALIDATOR: any = {\n  provide: NG_VALIDATORS,\n  useExisting: forwardRef(() => EmailValidator),\n  multi: true\n};\n\n/**\n * A directive that adds the `email` validator to controls marked with the\n * `email` attribute. The directive is provided with the `NG_VALIDATORS` multi-provider list.\n *\n * @see [Form Validation](guide/form-validation)\n *\n * @usageNotes\n *\n * ### Adding an email validator\n *\n * The following example shows how to add an email validator to an input attached to an ngModel\n * binding.\n *\n * ```\n * <input type=\"email\" name=\"email\" ngModel email>\n * <input type=\"email\" name=\"email\" ngModel email=\"true\">\n * <input type=\"email\" name=\"email\" ngModel [email]=\"true\">\n * ```\n *\n * @publicApi\n * @ngModule FormsModule\n * @ngModule ReactiveFormsModule\n */\n@Directive({\n  selector: '[email][formControlName],[email][formControl],[email][ngModel]',\n  providers: [EMAIL_VALIDATOR]\n})\nexport class EmailValidator implements Validator {\n  private _enabled = false;\n  private _onChange?: () => void;\n\n  /**\n   * @description\n   * Tracks changes to the email attribute bound to this directive.\n   */\n  @Input()\n  set email(value: boolean|string) {\n    this._enabled = value === '' || value === true || value === 'true';\n    if (this._onChange) this._onChange();\n  }\n\n  /**\n   * Method that validates whether an email address is valid.\n   * Returns the validation result if enabled, otherwise null.\n   * @nodoc\n   */\n  validate(control: AbstractControl): ValidationErrors|null {\n    return this._enabled ? Validators.email(control) : null;\n  }\n\n  /**\n   * Registers a callback function to call when the validator inputs change.\n   * @nodoc\n   */\n  registerOnValidatorChange(fn: () => void): void {\n    this._onChange = fn;\n  }\n}\n\n/**\n * @description\n * A function that receives a control and synchronously returns a map of\n * validation errors if present, otherwise null.\n *\n * @publicApi\n */\nexport interface ValidatorFn {\n  (control: AbstractControl): ValidationErrors|null;\n}\n\n/**\n * @description\n * A function that receives a control and returns a Promise or observable\n * that emits validation errors if present, otherwise null.\n *\n * @publicApi\n */\nexport interface AsyncValidatorFn {\n  (control: AbstractControl): Promise<ValidationErrors|null>|Observable<ValidationErrors|null>;\n}\n\n/**\n * @description\n * Provider which adds `MinLengthValidator` to the `NG_VALIDATORS` multi-provider list.\n */\nexport const MIN_LENGTH_VALIDATOR: any = {\n  provide: NG_VALIDATORS,\n  useExisting: forwardRef(() => MinLengthValidator),\n  multi: true\n};\n\n/**\n * A directive that adds minimum length validation to controls marked with the\n * `minlength` attribute. The directive is provided with the `NG_VALIDATORS` multi-provider list.\n *\n * @see [Form Validation](guide/form-validation)\n *\n * @usageNotes\n *\n * ### Adding a minimum length validator\n *\n * The following example shows how to add a minimum length validator to an input attached to an\n * ngModel binding.\n *\n * ```html\n * <input name=\"firstName\" ngModel minlength=\"4\">\n * ```\n *\n * @ngModule ReactiveFormsModule\n * @ngModule FormsModule\n * @publicApi\n */\n@Directive({\n  selector: '[minlength][formControlName],[minlength][formControl],[minlength][ngModel]',\n  providers: [MIN_LENGTH_VALIDATOR],\n  host: {'[attr.minlength]': 'minlength ? minlength : null'}\n})\nexport class MinLengthValidator implements Validator, OnChanges {\n  private _validator: ValidatorFn = Validators.nullValidator;\n  private _onChange?: () => void;\n\n  /**\n   * @description\n   * Tracks changes to the the minimum length bound to this directive.\n   */\n  @Input()\n  minlength!: string|number;  // This input is always defined, since the name matches selector.\n\n  /** @nodoc */\n  ngOnChanges(changes: SimpleChanges): void {\n    if ('minlength' in changes) {\n      this._createValidator();\n      if (this._onChange) this._onChange();\n    }\n  }\n\n  /**\n   * Method that validates whether the value meets a minimum length requirement.\n   * Returns the validation result if enabled, otherwise null.\n   * @nodoc\n   */\n  validate(control: AbstractControl): ValidationErrors|null {\n    return this.minlength == null ? null : this._validator(control);\n  }\n\n  /**\n   * Registers a callback function to call when the validator inputs change.\n   * @nodoc\n   */\n  registerOnValidatorChange(fn: () => void): void {\n    this._onChange = fn;\n  }\n\n  private _createValidator(): void {\n    this._validator = Validators.minLength(\n        typeof this.minlength === 'number' ? this.minlength : parseInt(this.minlength, 10));\n  }\n}\n\n/**\n * @description\n * Provider which adds `MaxLengthValidator` to the `NG_VALIDATORS` multi-provider list.\n */\nexport const MAX_LENGTH_VALIDATOR: any = {\n  provide: NG_VALIDATORS,\n  useExisting: forwardRef(() => MaxLengthValidator),\n  multi: true\n};\n\n/**\n * A directive that adds max length validation to controls marked with the\n * `maxlength` attribute. The directive is provided with the `NG_VALIDATORS` multi-provider list.\n *\n * @see [Form Validation](guide/form-validation)\n *\n * @usageNotes\n *\n * ### Adding a maximum length validator\n *\n * The following example shows how to add a maximum length validator to an input attached to an\n * ngModel binding.\n *\n * ```html\n * <input name=\"firstName\" ngModel maxlength=\"25\">\n * ```\n *\n * @ngModule ReactiveFormsModule\n * @ngModule FormsModule\n * @publicApi\n */\n@Directive({\n  selector: '[maxlength][formControlName],[maxlength][formControl],[maxlength][ngModel]',\n  providers: [MAX_LENGTH_VALIDATOR],\n  host: {'[attr.maxlength]': 'maxlength ? maxlength : null'}\n})\nexport class MaxLengthValidator implements Validator, OnChanges {\n  private _validator: ValidatorFn = Validators.nullValidator;\n  private _onChange?: () => void;\n\n  /**\n   * @description\n   * Tracks changes to the the maximum length bound to this directive.\n   */\n  @Input()\n  maxlength!: string|number;  // This input is always defined, since the name matches selector.\n\n  /** @nodoc */\n  ngOnChanges(changes: SimpleChanges): void {\n    if ('maxlength' in changes) {\n      this._createValidator();\n      if (this._onChange) this._onChange();\n    }\n  }\n\n  /**\n   * Method that validates whether the value exceeds the maximum length requirement.\n   * @nodoc\n   */\n  validate(control: AbstractControl): ValidationErrors|null {\n    return this.maxlength != null ? this._validator(control) : null;\n  }\n\n  /**\n   * Registers a callback function to call when the validator inputs change.\n   * @nodoc\n   */\n  registerOnValidatorChange(fn: () => void): void {\n    this._onChange = fn;\n  }\n\n  private _createValidator(): void {\n    this._validator = Validators.maxLength(\n        typeof this.maxlength === 'number' ? this.maxlength : parseInt(this.maxlength, 10));\n  }\n}\n\n/**\n * @description\n * Provider which adds `PatternValidator` to the `NG_VALIDATORS` multi-provider list.\n */\nexport const PATTERN_VALIDATOR: any = {\n  provide: NG_VALIDATORS,\n  useExisting: forwardRef(() => PatternValidator),\n  multi: true\n};\n\n\n/**\n * @description\n * A directive that adds regex pattern validation to controls marked with the\n * `pattern` attribute. The regex must match the entire control value.\n * The directive is provided with the `NG_VALIDATORS` multi-provider list.\n *\n * @see [Form Validation](guide/form-validation)\n *\n * @usageNotes\n *\n * ### Adding a pattern validator\n *\n * The following example shows how to add a pattern validator to an input attached to an\n * ngModel binding.\n *\n * ```html\n * <input name=\"firstName\" ngModel pattern=\"[a-zA-Z ]*\">\n * ```\n *\n * @ngModule ReactiveFormsModule\n * @ngModule FormsModule\n * @publicApi\n */\n@Directive({\n  selector: '[pattern][formControlName],[pattern][formControl],[pattern][ngModel]',\n  providers: [PATTERN_VALIDATOR],\n  host: {'[attr.pattern]': 'pattern ? pattern : null'}\n})\nexport class PatternValidator implements Validator, OnChanges {\n  private _validator: ValidatorFn = Validators.nullValidator;\n  private _onChange?: () => void;\n\n  /**\n   * @description\n   * Tracks changes to the pattern bound to this directive.\n   */\n  @Input()\n  pattern!: string|RegExp;  // This input is always defined, since the name matches selector.\n\n  /** @nodoc */\n  ngOnChanges(changes: SimpleChanges): void {\n    if ('pattern' in changes) {\n      this._createValidator();\n      if (this._onChange) this._onChange();\n    }\n  }\n\n  /**\n   * Method that validates whether the value matches the the pattern requirement.\n   * @nodoc\n   */\n  validate(control: AbstractControl): ValidationErrors|null {\n    return this._validator(control);\n  }\n\n  /**\n   * Registers a callback function to call when the validator inputs change.\n   * @nodoc\n   */\n  registerOnValidatorChange(fn: () => void): void {\n    this._onChange = fn;\n  }\n\n  private _createValidator(): void {\n    this._validator = Validators.pattern(this.pattern);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgModule, Type} from '@angular/core';\n\nimport {CheckboxControlValueAccessor} from './directives/checkbox_value_accessor';\nimport {DefaultValueAccessor} from './directives/default_value_accessor';\nimport {NgControlStatus, NgControlStatusGroup} from './directives/ng_control_status';\nimport {NgForm} from './directives/ng_form';\nimport {NgModel} from './directives/ng_model';\nimport {NgModelGroup} from './directives/ng_model_group';\nimport {NgNoValidate} from './directives/ng_no_validate_directive';\nimport {NumberValueAccessor} from './directives/number_value_accessor';\nimport {RadioControlValueAccessor} from './directives/radio_control_value_accessor';\nimport {RangeValueAccessor} from './directives/range_value_accessor';\nimport {FormControlDirective} from './directives/reactive_directives/form_control_directive';\nimport {FormControlName} from './directives/reactive_directives/form_control_name';\nimport {FormGroupDirective} from './directives/reactive_directives/form_group_directive';\nimport {FormArrayName, FormGroupName} from './directives/reactive_directives/form_group_name';\nimport {NgSelectOption, SelectControlValueAccessor} from './directives/select_control_value_accessor';\nimport {NgSelectMultipleOption, SelectMultipleControlValueAccessor} from './directives/select_multiple_control_value_accessor';\nimport {CheckboxRequiredValidator, EmailValidator, MaxLengthValidator, MinLengthValidator, PatternValidator, RequiredValidator} from './directives/validators';\n\nexport {CheckboxControlValueAccessor} from './directives/checkbox_value_accessor';\nexport {ControlValueAccessor} from './directives/control_value_accessor';\nexport {DefaultValueAccessor} from './directives/default_value_accessor';\nexport {NgControl} from './directives/ng_control';\nexport {NgControlStatus, NgControlStatusGroup} from './directives/ng_control_status';\nexport {NgForm} from './directives/ng_form';\nexport {NgModel} from './directives/ng_model';\nexport {NgModelGroup} from './directives/ng_model_group';\nexport {NumberValueAccessor} from './directives/number_value_accessor';\nexport {RadioControlValueAccessor} from './directives/radio_control_value_accessor';\nexport {RangeValueAccessor} from './directives/range_value_accessor';\nexport {FormControlDirective, NG_MODEL_WITH_FORM_CONTROL_WARNING} from './directives/reactive_directives/form_control_directive';\nexport {FormControlName} from './directives/reactive_directives/form_control_name';\nexport {FormGroupDirective} from './directives/reactive_directives/form_group_directive';\nexport {FormArrayName, FormGroupName} from './directives/reactive_directives/form_group_name';\nexport {NgSelectOption, SelectControlValueAccessor} from './directives/select_control_value_accessor';\nexport {NgSelectMultipleOption, SelectMultipleControlValueAccessor} from './directives/select_multiple_control_value_accessor';\n\nexport const SHARED_FORM_DIRECTIVES: Type<any>[] = [\n  NgNoValidate,\n  NgSelectOption,\n  NgSelectMultipleOption,\n  DefaultValueAccessor,\n  NumberValueAccessor,\n  RangeValueAccessor,\n  CheckboxControlValueAccessor,\n  SelectControlValueAccessor,\n  SelectMultipleControlValueAccessor,\n  RadioControlValueAccessor,\n  NgControlStatus,\n  NgControlStatusGroup,\n  RequiredValidator,\n  MinLengthValidator,\n  MaxLengthValidator,\n  PatternValidator,\n  CheckboxRequiredValidator,\n  EmailValidator,\n];\n\nexport const TEMPLATE_DRIVEN_DIRECTIVES: Type<any>[] = [NgModel, NgModelGroup, NgForm];\n\nexport const REACTIVE_DRIVEN_DIRECTIVES: Type<any>[] =\n    [FormControlDirective, FormGroupDirective, FormControlName, FormGroupName, FormArrayName];\n\n/**\n * Internal module used for sharing directives between FormsModule and ReactiveFormsModule\n */\n@NgModule({\n  declarations: SHARED_FORM_DIRECTIVES,\n  exports: SHARED_FORM_DIRECTIVES,\n})\nexport class ɵInternalFormsSharedModule {\n}\n\nexport {ɵInternalFormsSharedModule as InternalFormsSharedModule};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable} from '@angular/core';\n\nimport {AsyncValidatorFn, ValidatorFn} from './directives/validators';\nimport {AbstractControl, AbstractControlOptions, FormArray, FormControl, FormGroup, FormHooks} from './model';\n\nfunction isAbstractControlOptions(options: AbstractControlOptions|\n                                  {[key: string]: any}): options is AbstractControlOptions {\n  return (<AbstractControlOptions>options).asyncValidators !== undefined ||\n      (<AbstractControlOptions>options).validators !== undefined ||\n      (<AbstractControlOptions>options).updateOn !== undefined;\n}\n\n/**\n * @description\n * Creates an `AbstractControl` from a user-specified configuration.\n *\n * The `FormBuilder` provides syntactic sugar that shortens creating instances of a `FormControl`,\n * `FormGroup`, or `FormArray`. It reduces the amount of boilerplate needed to build complex\n * forms.\n *\n * @see [Reactive Forms Guide](/guide/reactive-forms)\n *\n * @publicApi\n */\n@Injectable()\nexport class FormBuilder {\n  /**\n   * @description\n   * Construct a new `FormGroup` instance.\n   *\n   * @param controlsConfig A collection of child controls. The key for each child is the name\n   * under which it is registered.\n   *\n   * @param options Configuration options object for the `FormGroup`. The object can\n   * have two shapes:\n   *\n   * 1) `AbstractControlOptions` object (preferred), which consists of:\n   * * `validators`: A synchronous validator function, or an array of validator functions\n   * * `asyncValidators`: A single async validator or array of async validator functions\n   * * `updateOn`: The event upon which the control should be updated (options: 'change' | 'blur' |\n   * submit')\n   *\n   * 2) Legacy configuration object, which consists of:\n   * * `validator`: A synchronous validator function, or an array of validator functions\n   * * `asyncValidator`: A single async validator or array of async validator functions\n   *\n   */\n  group(\n      controlsConfig: {[key: string]: any},\n      options: AbstractControlOptions|{[key: string]: any}|null = null): FormGroup {\n    const controls = this._reduceControls(controlsConfig);\n\n    let validators: ValidatorFn|ValidatorFn[]|null = null;\n    let asyncValidators: AsyncValidatorFn|AsyncValidatorFn[]|null = null;\n    let updateOn: FormHooks|undefined = undefined;\n\n    if (options != null) {\n      if (isAbstractControlOptions(options)) {\n        // `options` are `AbstractControlOptions`\n        validators = options.validators != null ? options.validators : null;\n        asyncValidators = options.asyncValidators != null ? options.asyncValidators : null;\n        updateOn = options.updateOn != null ? options.updateOn : undefined;\n      } else {\n        // `options` are legacy form group options\n        validators = options['validator'] != null ? options['validator'] : null;\n        asyncValidators = options['asyncValidator'] != null ? options['asyncValidator'] : null;\n      }\n    }\n\n    return new FormGroup(controls, {asyncValidators, updateOn, validators});\n  }\n\n  /**\n   * @description\n   * Construct a new `FormControl` with the given state, validators and options.\n   *\n   * @param formState Initializes the control with an initial state value, or\n   * with an object that contains both a value and a disabled status.\n   *\n   * @param validatorOrOpts A synchronous validator function, or an array of\n   * such functions, or an `AbstractControlOptions` object that contains\n   * validation functions and a validation trigger.\n   *\n   * @param asyncValidator A single async validator or array of async validator\n   * functions.\n   *\n   * @usageNotes\n   *\n   * ### Initialize a control as disabled\n   *\n   * The following example returns a control with an initial value in a disabled state.\n   *\n   * <code-example path=\"forms/ts/formBuilder/form_builder_example.ts\" region=\"disabled-control\">\n   * </code-example>\n   */\n  control(\n      formState: any, validatorOrOpts?: ValidatorFn|ValidatorFn[]|AbstractControlOptions|null,\n      asyncValidator?: AsyncValidatorFn|AsyncValidatorFn[]|null): FormControl {\n    return new FormControl(formState, validatorOrOpts, asyncValidator);\n  }\n\n  /**\n   * Constructs a new `FormArray` from the given array of configurations,\n   * validators and options.\n   *\n   * @param controlsConfig An array of child controls or control configs. Each\n   * child control is given an index when it is registered.\n   *\n   * @param validatorOrOpts A synchronous validator function, or an array of\n   * such functions, or an `AbstractControlOptions` object that contains\n   * validation functions and a validation trigger.\n   *\n   * @param asyncValidator A single async validator or array of async validator\n   * functions.\n   */\n  array(\n      controlsConfig: any[],\n      validatorOrOpts?: ValidatorFn|ValidatorFn[]|AbstractControlOptions|null,\n      asyncValidator?: AsyncValidatorFn|AsyncValidatorFn[]|null): FormArray {\n    const controls = controlsConfig.map(c => this._createControl(c));\n    return new FormArray(controls, validatorOrOpts, asyncValidator);\n  }\n\n  /** @internal */\n  _reduceControls(controlsConfig: {[k: string]: any}): {[key: string]: AbstractControl} {\n    const controls: {[key: string]: AbstractControl} = {};\n    Object.keys(controlsConfig).forEach(controlName => {\n      controls[controlName] = this._createControl(controlsConfig[controlName]);\n    });\n    return controls;\n  }\n\n  /** @internal */\n  _createControl(controlConfig: any): AbstractControl {\n    if (controlConfig instanceof FormControl || controlConfig instanceof FormGroup ||\n        controlConfig instanceof FormArray) {\n      return controlConfig;\n\n    } else if (Array.isArray(controlConfig)) {\n      const value = controlConfig[0];\n      const validator: ValidatorFn = controlConfig.length > 1 ? controlConfig[1] : null;\n      const asyncValidator: AsyncValidatorFn = controlConfig.length > 2 ? controlConfig[2] : null;\n      return this.control(value, validator, asyncValidator);\n\n    } else {\n      return this.control(controlConfig);\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @module\n * @description\n * Entry point for all public APIs of the common package.\n */\n\nimport {Version} from '@angular/core';\n\n/**\n * @publicApi\n */\nexport const VERSION = new Version('10.1.3');\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ModuleWithProviders, NgModule} from '@angular/core';\n\nimport {InternalFormsSharedModule, NG_MODEL_WITH_FORM_CONTROL_WARNING, REACTIVE_DRIVEN_DIRECTIVES, TEMPLATE_DRIVEN_DIRECTIVES} from './directives';\nimport {RadioControlRegistry} from './directives/radio_control_value_accessor';\nimport {FormBuilder} from './form_builder';\n\n/**\n * Exports the required providers and directives for template-driven forms,\n * making them available for import by NgModules that import this module.\n *\n * @see [Forms Overview](/guide/forms-overview)\n * @see [Template-driven Forms Guide](/guide/forms)\n *\n * @publicApi\n */\n@NgModule({\n  declarations: TEMPLATE_DRIVEN_DIRECTIVES,\n  providers: [RadioControlRegistry],\n  exports: [InternalFormsSharedModule, TEMPLATE_DRIVEN_DIRECTIVES]\n})\nexport class FormsModule {\n}\n\n/**\n * Exports the required infrastructure and directives for reactive forms,\n * making them available for import by NgModules that import this module.\n *\n * @see [Forms Overview](guide/forms-overview)\n * @see [Reactive Forms Guide](guide/reactive-forms)\n *\n * @publicApi\n */\n@NgModule({\n  declarations: [REACTIVE_DRIVEN_DIRECTIVES],\n  providers: [FormBuilder, RadioControlRegistry],\n  exports: [InternalFormsSharedModule, REACTIVE_DRIVEN_DIRECTIVES]\n})\nexport class ReactiveFormsModule {\n  /**\n   * @description\n   * Provides options for configuring the reactive forms module.\n   *\n   * @param opts An object of configuration options\n   * * `warnOnNgModelWithFormControl` Configures when to emit a warning when an `ngModel`\n   * binding is used with reactive form directives.\n   */\n  static withConfig(opts: {\n    /** @deprecated as of v6 */ warnOnNgModelWithFormControl: 'never'|'once'|'always'\n  }): ModuleWithProviders<ReactiveFormsModule> {\n    return {\n      ngModule: ReactiveFormsModule,\n      providers: [\n        {provide: NG_MODEL_WITH_FORM_CONTROL_WARNING, useValue: opts.warnOnNgModelWithFormControl}\n      ]\n    };\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @module\n * @description\n * This module is used for handling user input, by defining and building a `FormGroup` that\n * consists of `FormControl` objects, and mapping them onto the DOM. `FormControl`\n * objects can then be used to read information from the form DOM elements.\n *\n * Forms providers are not included in default providers; you must import these providers\n * explicitly.\n */\n\n\nexport {ɵInternalFormsSharedModule} from './directives';\nexport {AbstractControlDirective} from './directives/abstract_control_directive';\nexport {AbstractFormGroupDirective} from './directives/abstract_form_group_directive';\nexport {CheckboxControlValueAccessor} from './directives/checkbox_value_accessor';\nexport {ControlContainer} from './directives/control_container';\nexport {ControlValueAccessor, NG_VALUE_ACCESSOR} from './directives/control_value_accessor';\nexport {COMPOSITION_BUFFER_MODE, DefaultValueAccessor} from './directives/default_value_accessor';\nexport {Form} from './directives/form_interface';\nexport {NgControl} from './directives/ng_control';\nexport {NgControlStatus, NgControlStatusGroup} from './directives/ng_control_status';\nexport {NgForm} from './directives/ng_form';\nexport {NgModel} from './directives/ng_model';\nexport {NgModelGroup} from './directives/ng_model_group';\nexport {ɵNgNoValidate} from './directives/ng_no_validate_directive';\nexport {NumberValueAccessor} from './directives/number_value_accessor';\nexport {RadioControlValueAccessor} from './directives/radio_control_value_accessor';\nexport {RangeValueAccessor} from './directives/range_value_accessor';\nexport {FormControlDirective} from './directives/reactive_directives/form_control_directive';\nexport {FormControlName} from './directives/reactive_directives/form_control_name';\nexport {FormGroupDirective} from './directives/reactive_directives/form_group_directive';\nexport {FormArrayName} from './directives/reactive_directives/form_group_name';\nexport {FormGroupName} from './directives/reactive_directives/form_group_name';\nexport {NgSelectOption, SelectControlValueAccessor} from './directives/select_control_value_accessor';\nexport {SelectMultipleControlValueAccessor} from './directives/select_multiple_control_value_accessor';\nexport {ɵNgSelectMultipleOption} from './directives/select_multiple_control_value_accessor';\nexport {AsyncValidator, AsyncValidatorFn, CheckboxRequiredValidator, EmailValidator, MaxLengthValidator, MinLengthValidator, PatternValidator, RequiredValidator, ValidationErrors, Validator, ValidatorFn} from './directives/validators';\nexport {FormBuilder} from './form_builder';\nexport {AbstractControl, AbstractControlOptions, FormArray, FormControl, FormGroup} from './model';\nexport {NG_ASYNC_VALIDATORS, NG_VALIDATORS, Validators} from './validators';\nexport {VERSION} from './version';\n\nexport * from './form_providers';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @module\n * @description\n * Entry point for all public APIs of this package.\n */\nexport * from './src/forms';\n\n// This file only reexports content of the `src` folder. Keep it that way.\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n// This file is not used to build this module. It is only used during editing\n// by the TypeScript language service and during build for verification. `ngc`\n// replaces this file with production index.ts when it rewrites private symbol\n// names.\n\nexport * from './public_api';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './index';\n\nexport {InternalFormsSharedModule as ɵangular_packages_forms_forms_d,REACTIVE_DRIVEN_DIRECTIVES as ɵangular_packages_forms_forms_c,SHARED_FORM_DIRECTIVES as ɵangular_packages_forms_forms_a,TEMPLATE_DRIVEN_DIRECTIVES as ɵangular_packages_forms_forms_b} from './src/directives';\nexport {CHECKBOX_VALUE_ACCESSOR as ɵangular_packages_forms_forms_e} from './src/directives/checkbox_value_accessor';\nexport {DEFAULT_VALUE_ACCESSOR as ɵangular_packages_forms_forms_f} from './src/directives/default_value_accessor';\nexport {AbstractControlStatus as ɵangular_packages_forms_forms_g,ngControlStatusHost as ɵangular_packages_forms_forms_h} from './src/directives/ng_control_status';\nexport {formDirectiveProvider as ɵangular_packages_forms_forms_i} from './src/directives/ng_form';\nexport {formControlBinding as ɵangular_packages_forms_forms_j} from './src/directives/ng_model';\nexport {modelGroupProvider as ɵangular_packages_forms_forms_k} from './src/directives/ng_model_group';\nexport {NgNoValidate as ɵangular_packages_forms_forms_y} from './src/directives/ng_no_validate_directive';\nexport {NUMBER_VALUE_ACCESSOR as ɵangular_packages_forms_forms_l} from './src/directives/number_value_accessor';\nexport {RADIO_VALUE_ACCESSOR as ɵangular_packages_forms_forms_m,RadioControlRegistry as ɵangular_packages_forms_forms_n} from './src/directives/radio_control_value_accessor';\nexport {RANGE_VALUE_ACCESSOR as ɵangular_packages_forms_forms_o} from './src/directives/range_value_accessor';\nexport {NG_MODEL_WITH_FORM_CONTROL_WARNING as ɵangular_packages_forms_forms_p,formControlBinding as ɵangular_packages_forms_forms_q} from './src/directives/reactive_directives/form_control_directive';\nexport {controlNameBinding as ɵangular_packages_forms_forms_r} from './src/directives/reactive_directives/form_control_name';\nexport {formDirectiveProvider as ɵangular_packages_forms_forms_s} from './src/directives/reactive_directives/form_group_directive';\nexport {formArrayNameProvider as ɵangular_packages_forms_forms_u,formGroupNameProvider as ɵangular_packages_forms_forms_t} from './src/directives/reactive_directives/form_group_name';\nexport {SELECT_VALUE_ACCESSOR as ɵangular_packages_forms_forms_v} from './src/directives/select_control_value_accessor';\nexport {NgSelectMultipleOption as ɵangular_packages_forms_forms_x,SELECT_MULTIPLE_VALUE_ACCESSOR as ɵangular_packages_forms_forms_w} from './src/directives/select_multiple_control_value_accessor';\nexport {CHECKBOX_REQUIRED_VALIDATOR as ɵangular_packages_forms_forms_ba,EMAIL_VALIDATOR as ɵangular_packages_forms_forms_bb,MAX_LENGTH_VALIDATOR as ɵangular_packages_forms_forms_bd,MIN_LENGTH_VALIDATOR as ɵangular_packages_forms_forms_bc,PATTERN_VALIDATOR as ɵangular_packages_forms_forms_be,REQUIRED_VALIDATOR as ɵangular_packages_forms_forms_z} from './src/directives/validators';","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.fromPromise = rxjs_1.from;\n//# sourceMappingURL=fromPromise.js.map","import { async } from '../scheduler/async';\nimport { audit } from './audit';\nimport { timer } from '../observable/timer';\nexport function auditTime(duration, scheduler = async) {\n    return audit(() => timer(duration, scheduler));\n}\n//# sourceMappingURL=auditTime.js.map","export { webSocket as webSocket } from '../internal/observable/dom/webSocket';\nexport { WebSocketSubject } from '../internal/observable/dom/WebSocketSubject';\n//# sourceMappingURL=index.js.map","import { Subscriber } from '../Subscriber';\nexport function ignoreElements() {\n    return function ignoreElementsOperatorFunction(source) {\n        return source.lift(new IgnoreElementsOperator());\n    };\n}\nclass IgnoreElementsOperator {\n    call(subscriber, source) {\n        return source.subscribe(new IgnoreElementsSubscriber(subscriber));\n    }\n}\nclass IgnoreElementsSubscriber extends Subscriber {\n    _next(unused) {\n    }\n}\n//# sourceMappingURL=ignoreElements.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/* tslint:enable:max-line-length */\n/**\n * Recursively projects each source value to an Observable which is merged in\n * the output Observable.\n *\n * <span class=\"informal\">It's similar to {@link mergeMap}, but applies the\n * projection function to every source value as well as every output value.\n * It's recursive.</span>\n *\n * <img src=\"./img/expand.png\" width=\"100%\">\n *\n * Returns an Observable that emits items based on applying a function that you\n * supply to each item emitted by the source Observable, where that function\n * returns an Observable, and then merging those resulting Observables and\n * emitting the results of this merger. *Expand* will re-emit on the output\n * Observable every source value. Then, each output value is given to the\n * `project` function which returns an inner Observable to be merged on the\n * output Observable. Those output values resulting from the projection are also\n * given to the `project` function to produce new output values. This is how\n * *expand* behaves recursively.\n *\n * @example <caption>Start emitting the powers of two on every click, at most 10 of them</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var powersOfTwo = clicks\n *   .mapTo(1)\n *   .expand(x => Rx.Observable.of(2 * x).delay(1000))\n *   .take(10);\n * powersOfTwo.subscribe(x => console.log(x));\n *\n * @see {@link mergeMap}\n * @see {@link mergeScan}\n *\n * @param {function(value: T, index: number) => Observable} project A function\n * that, when applied to an item emitted by the source or the output Observable,\n * returns an Observable.\n * @param {number} [concurrent=Number.POSITIVE_INFINITY] Maximum number of input\n * Observables being subscribed to concurrently.\n * @param {Scheduler} [scheduler=null] The IScheduler to use for subscribing to\n * each projected inner Observable.\n * @return {Observable} An Observable that emits the source values and also\n * result of applying the projection function to each value emitted on the\n * output Observable and and merging the results of the Observables obtained\n * from this transformation.\n * @method expand\n * @owner Observable\n */\nfunction expand(project, concurrent, scheduler) {\n    if (concurrent === void 0) { concurrent = Number.POSITIVE_INFINITY; }\n    if (scheduler === void 0) { scheduler = undefined; }\n    concurrent = (concurrent || 0) < 1 ? Number.POSITIVE_INFINITY : concurrent;\n    return operators_1.expand(project, concurrent, scheduler)(this);\n}\nexports.expand = expand;\n//# sourceMappingURL=expand.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/* tslint:enable:max-line-length */\n/**\n * Perform a side effect for every emission on the source Observable, but return\n * an Observable that is identical to the source.\n *\n * <span class=\"informal\">Intercepts each emission on the source and runs a\n * function, but returns an output which is identical to the source as long as errors don't occur.</span>\n *\n * <img src=\"./img/do.png\" width=\"100%\">\n *\n * Returns a mirrored Observable of the source Observable, but modified so that\n * the provided Observer is called to perform a side effect for every value,\n * error, and completion emitted by the source. Any errors that are thrown in\n * the aforementioned Observer or handlers are safely sent down the error path\n * of the output Observable.\n *\n * This operator is useful for debugging your Observables for the correct values\n * or performing other side effects.\n *\n * Note: this is different to a `subscribe` on the Observable. If the Observable\n * returned by `do` is not subscribed, the side effects specified by the\n * Observer will never happen. `do` therefore simply spies on existing\n * execution, it does not trigger an execution to happen like `subscribe` does.\n *\n * @example <caption>Map every click to the clientX position of that click, while also logging the click event</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var positions = clicks\n *   .do(ev => console.log(ev))\n *   .map(ev => ev.clientX);\n * positions.subscribe(x => console.log(x));\n *\n * @see {@link map}\n * @see {@link subscribe}\n *\n * @param {Observer|function} [nextOrObserver] A normal Observer object or a\n * callback for `next`.\n * @param {function} [error] Callback for errors in the source.\n * @param {function} [complete] Callback for the completion of the source.\n * @return {Observable} An Observable identical to the source, but runs the\n * specified Observer or callback(s) for each item.\n * @method do\n * @name do\n * @owner Observable\n */\nfunction _do(nextOrObserver, error, complete) {\n    return operators_1.tap(nextOrObserver, error, complete)(this);\n}\nexports._do = _do;\n//# sourceMappingURL=do.js.map","const ArgumentOutOfRangeErrorImpl = (() => {\n    function ArgumentOutOfRangeErrorImpl() {\n        Error.call(this);\n        this.message = 'argument out of range';\n        this.name = 'ArgumentOutOfRangeError';\n        return this;\n    }\n    ArgumentOutOfRangeErrorImpl.prototype = Object.create(Error.prototype);\n    return ArgumentOutOfRangeErrorImpl;\n})();\nexport const ArgumentOutOfRangeError = ArgumentOutOfRangeErrorImpl;\n//# sourceMappingURL=ArgumentOutOfRangeError.js.map","import { Observable } from '../Observable';\nimport { AsyncSubject } from '../AsyncSubject';\nimport { map } from '../operators/map';\nimport { canReportError } from '../util/canReportError';\nimport { isScheduler } from '../util/isScheduler';\nimport { isArray } from '../util/isArray';\nexport function bindNodeCallback(callbackFunc, resultSelector, scheduler) {\n    if (resultSelector) {\n        if (isScheduler(resultSelector)) {\n            scheduler = resultSelector;\n        }\n        else {\n            return (...args) => bindNodeCallback(callbackFunc, scheduler)(...args).pipe(map(args => isArray(args) ? resultSelector(...args) : resultSelector(args)));\n        }\n    }\n    return function (...args) {\n        const params = {\n            subject: undefined,\n            args,\n            callbackFunc,\n            scheduler,\n            context: this,\n        };\n        return new Observable(subscriber => {\n            const { context } = params;\n            let { subject } = params;\n            if (!scheduler) {\n                if (!subject) {\n                    subject = params.subject = new AsyncSubject();\n                    const handler = (...innerArgs) => {\n                        const err = innerArgs.shift();\n                        if (err) {\n                            subject.error(err);\n                            return;\n                        }\n                        subject.next(innerArgs.length <= 1 ? innerArgs[0] : innerArgs);\n                        subject.complete();\n                    };\n                    try {\n                        callbackFunc.apply(context, [...args, handler]);\n                    }\n                    catch (err) {\n                        if (canReportError(subject)) {\n                            subject.error(err);\n                        }\n                        else {\n                            console.warn(err);\n                        }\n                    }\n                }\n                return subject.subscribe(subscriber);\n            }\n            else {\n                return scheduler.schedule(dispatch, 0, { params, subscriber, context });\n            }\n        });\n    };\n}\nfunction dispatch(state) {\n    const { params, subscriber, context } = state;\n    const { callbackFunc, args, scheduler } = params;\n    let subject = params.subject;\n    if (!subject) {\n        subject = params.subject = new AsyncSubject();\n        const handler = (...innerArgs) => {\n            const err = innerArgs.shift();\n            if (err) {\n                this.add(scheduler.schedule(dispatchError, 0, { err, subject }));\n            }\n            else {\n                const value = innerArgs.length <= 1 ? innerArgs[0] : innerArgs;\n                this.add(scheduler.schedule(dispatchNext, 0, { value, subject }));\n            }\n        };\n        try {\n            callbackFunc.apply(context, [...args, handler]);\n        }\n        catch (err) {\n            this.add(scheduler.schedule(dispatchError, 0, { err, subject }));\n        }\n    }\n    this.add(subject.subscribe(subscriber));\n}\nfunction dispatchNext(arg) {\n    const { value, subject } = arg;\n    subject.next(value);\n    subject.complete();\n}\nfunction dispatchError(arg) {\n    const { err, subject } = arg;\n    subject.error(err);\n}\n//# sourceMappingURL=bindNodeCallback.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar switchMap_1 = require(\"../../operator/switchMap\");\nrxjs_1.Observable.prototype.switchMap = switchMap_1.switchMap;\n//# sourceMappingURL=switchMap.js.map","import { isArray } from '../util/isArray';\nimport { race as raceStatic } from '../observable/race';\nexport function race(...observables) {\n    return function raceOperatorFunction(source) {\n        if (observables.length === 1 && isArray(observables[0])) {\n            observables = observables[0];\n        }\n        return source.lift.call(raceStatic(source, ...observables));\n    };\n}\n//# sourceMappingURL=race.js.map","import { async } from '../scheduler/async';\nimport { scan } from './scan';\nimport { defer } from '../observable/defer';\nimport { map } from './map';\nexport function timeInterval(scheduler = async) {\n    return (source) => defer(() => {\n        return source.pipe(scan(({ current }, value) => ({ value, current: scheduler.now(), last: current }), { current: scheduler.now(), value: undefined, last: undefined }), map(({ current, last, value }) => new TimeInterval(value, current - last)));\n    });\n}\nexport class TimeInterval {\n    constructor(value, interval) {\n        this.value = value;\n        this.interval = interval;\n    }\n}\n//# sourceMappingURL=timeInterval.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.race = rxjs_1.race;\n//# sourceMappingURL=race.js.map","import { Observable } from '../Observable';\nimport { Subscription } from '../Subscription';\nexport function schedulePromise(input, scheduler) {\n    return new Observable(subscriber => {\n        const sub = new Subscription();\n        sub.add(scheduler.schedule(() => input.then(value => {\n            sub.add(scheduler.schedule(() => {\n                subscriber.next(value);\n                sub.add(scheduler.schedule(() => subscriber.complete()));\n            }));\n        }, err => {\n            sub.add(scheduler.schedule(() => subscriber.error(err)));\n        })));\n        return sub;\n    });\n}\n//# sourceMappingURL=schedulePromise.js.map","import { map } from './map';\nimport { from } from '../observable/from';\nimport { SimpleOuterSubscriber, SimpleInnerSubscriber, innerSubscribe } from '../innerSubscribe';\nexport function mergeMap(project, resultSelector, concurrent = Number.POSITIVE_INFINITY) {\n    if (typeof resultSelector === 'function') {\n        return (source) => source.pipe(mergeMap((a, i) => from(project(a, i)).pipe(map((b, ii) => resultSelector(a, b, i, ii))), concurrent));\n    }\n    else if (typeof resultSelector === 'number') {\n        concurrent = resultSelector;\n    }\n    return (source) => source.lift(new MergeMapOperator(project, concurrent));\n}\nexport class MergeMapOperator {\n    constructor(project, concurrent = Number.POSITIVE_INFINITY) {\n        this.project = project;\n        this.concurrent = concurrent;\n    }\n    call(observer, source) {\n        return source.subscribe(new MergeMapSubscriber(observer, this.project, this.concurrent));\n    }\n}\nexport class MergeMapSubscriber extends SimpleOuterSubscriber {\n    constructor(destination, project, concurrent = Number.POSITIVE_INFINITY) {\n        super(destination);\n        this.project = project;\n        this.concurrent = concurrent;\n        this.hasCompleted = false;\n        this.buffer = [];\n        this.active = 0;\n        this.index = 0;\n    }\n    _next(value) {\n        if (this.active < this.concurrent) {\n            this._tryNext(value);\n        }\n        else {\n            this.buffer.push(value);\n        }\n    }\n    _tryNext(value) {\n        let result;\n        const index = this.index++;\n        try {\n            result = this.project(value, index);\n        }\n        catch (err) {\n            this.destination.error(err);\n            return;\n        }\n        this.active++;\n        this._innerSub(result);\n    }\n    _innerSub(ish) {\n        const innerSubscriber = new SimpleInnerSubscriber(this);\n        const destination = this.destination;\n        destination.add(innerSubscriber);\n        const innerSubscription = innerSubscribe(ish, innerSubscriber);\n        if (innerSubscription !== innerSubscriber) {\n            destination.add(innerSubscription);\n        }\n    }\n    _complete() {\n        this.hasCompleted = true;\n        if (this.active === 0 && this.buffer.length === 0) {\n            this.destination.complete();\n        }\n        this.unsubscribe();\n    }\n    notifyNext(innerValue) {\n        this.destination.next(innerValue);\n    }\n    notifyComplete() {\n        const buffer = this.buffer;\n        this.active--;\n        if (buffer.length > 0) {\n            this._next(buffer.shift());\n        }\n        else if (this.active === 0 && this.hasCompleted) {\n            this.destination.complete();\n        }\n    }\n}\nexport const flatMap = mergeMap;\n//# sourceMappingURL=mergeMap.js.map","import { SimpleOuterSubscriber, SimpleInnerSubscriber, innerSubscribe } from '../innerSubscribe';\nexport function mergeScan(accumulator, seed, concurrent = Number.POSITIVE_INFINITY) {\n    return (source) => source.lift(new MergeScanOperator(accumulator, seed, concurrent));\n}\nexport class MergeScanOperator {\n    constructor(accumulator, seed, concurrent) {\n        this.accumulator = accumulator;\n        this.seed = seed;\n        this.concurrent = concurrent;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new MergeScanSubscriber(subscriber, this.accumulator, this.seed, this.concurrent));\n    }\n}\nexport class MergeScanSubscriber extends SimpleOuterSubscriber {\n    constructor(destination, accumulator, acc, concurrent) {\n        super(destination);\n        this.accumulator = accumulator;\n        this.acc = acc;\n        this.concurrent = concurrent;\n        this.hasValue = false;\n        this.hasCompleted = false;\n        this.buffer = [];\n        this.active = 0;\n        this.index = 0;\n    }\n    _next(value) {\n        if (this.active < this.concurrent) {\n            const index = this.index++;\n            const destination = this.destination;\n            let ish;\n            try {\n                const { accumulator } = this;\n                ish = accumulator(this.acc, value, index);\n            }\n            catch (e) {\n                return destination.error(e);\n            }\n            this.active++;\n            this._innerSub(ish);\n        }\n        else {\n            this.buffer.push(value);\n        }\n    }\n    _innerSub(ish) {\n        const innerSubscriber = new SimpleInnerSubscriber(this);\n        const destination = this.destination;\n        destination.add(innerSubscriber);\n        const innerSubscription = innerSubscribe(ish, innerSubscriber);\n        if (innerSubscription !== innerSubscriber) {\n            destination.add(innerSubscription);\n        }\n    }\n    _complete() {\n        this.hasCompleted = true;\n        if (this.active === 0 && this.buffer.length === 0) {\n            if (this.hasValue === false) {\n                this.destination.next(this.acc);\n            }\n            this.destination.complete();\n        }\n        this.unsubscribe();\n    }\n    notifyNext(innerValue) {\n        const { destination } = this;\n        this.acc = innerValue;\n        this.hasValue = true;\n        destination.next(innerValue);\n    }\n    notifyComplete() {\n        const buffer = this.buffer;\n        this.active--;\n        if (buffer.length > 0) {\n            this._next(buffer.shift());\n        }\n        else if (this.active === 0 && this.hasCompleted) {\n            if (this.hasValue === false) {\n                this.destination.next(this.acc);\n            }\n            this.destination.complete();\n        }\n    }\n}\n//# sourceMappingURL=mergeScan.js.map","import { Subscriber } from './Subscriber';\nexport class InnerSubscriber extends Subscriber {\n    constructor(parent, outerValue, outerIndex) {\n        super();\n        this.parent = parent;\n        this.outerValue = outerValue;\n        this.outerIndex = outerIndex;\n        this.index = 0;\n    }\n    _next(value) {\n        this.parent.notifyNext(this.outerValue, value, this.outerIndex, this.index++, this);\n    }\n    _error(error) {\n        this.parent.notifyError(error, this);\n        this.unsubscribe();\n    }\n    _complete() {\n        this.parent.notifyComplete(this);\n        this.unsubscribe();\n    }\n}\n//# sourceMappingURL=InnerSubscriber.js.map","import { Observable } from '../Observable';\nimport { Subscription } from '../Subscription';\nimport { observable as Symbol_observable } from '../symbol/observable';\nexport function scheduleObservable(input, scheduler) {\n    return new Observable(subscriber => {\n        const sub = new Subscription();\n        sub.add(scheduler.schedule(() => {\n            const observable = input[Symbol_observable]();\n            sub.add(observable.subscribe({\n                next(value) { sub.add(scheduler.schedule(() => subscriber.next(value))); },\n                error(err) { sub.add(scheduler.schedule(() => subscriber.error(err))); },\n                complete() { sub.add(scheduler.schedule(() => subscriber.complete())); },\n            }));\n        }));\n        return sub;\n    });\n}\n//# sourceMappingURL=scheduleObservable.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Converts a higher-order Observable into a first-order Observable by dropping\n * inner Observables while the previous inner Observable has not yet completed.\n *\n * <span class=\"informal\">Flattens an Observable-of-Observables by dropping the\n * next inner Observables while the current inner is still executing.</span>\n *\n * <img src=\"./img/exhaust.png\" width=\"100%\">\n *\n * `exhaust` subscribes to an Observable that emits Observables, also known as a\n * higher-order Observable. Each time it observes one of these emitted inner\n * Observables, the output Observable begins emitting the items emitted by that\n * inner Observable. So far, it behaves like {@link mergeAll}. However,\n * `exhaust` ignores every new inner Observable if the previous Observable has\n * not yet completed. Once that one completes, it will accept and flatten the\n * next inner Observable and repeat this process.\n *\n * @example <caption>Run a finite timer for each click, only if there is no currently active timer</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var higherOrder = clicks.map((ev) => Rx.Observable.interval(1000).take(5));\n * var result = higherOrder.exhaust();\n * result.subscribe(x => console.log(x));\n *\n * @see {@link combineAll}\n * @see {@link concatAll}\n * @see {@link switch}\n * @see {@link mergeAll}\n * @see {@link exhaustMap}\n * @see {@link zipAll}\n *\n * @return {Observable} An Observable that takes a source of Observables and propagates the first observable\n * exclusively until it completes before subscribing to the next.\n */\nfunction exhaust() {\n    return operators_1.exhaust()(this);\n}\nexports.exhaust = exhaust;\n//# sourceMappingURL=exhaust.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {FocusMonitor, FocusOrigin} from '@angular/cdk/a11y';\nimport {Directionality} from '@angular/cdk/bidi';\nimport {\n  BooleanInput,\n  coerceBooleanProperty,\n  coerceNumberProperty,\n  NumberInput\n} from '@angular/cdk/coercion';\nimport {\n  DOWN_ARROW,\n  END,\n  HOME,\n  LEFT_ARROW,\n  PAGE_DOWN,\n  PAGE_UP,\n  RIGHT_ARROW,\n  UP_ARROW,\n  hasModifierKey,\n} from '@angular/cdk/keycodes';\nimport {\n  Attribute,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ElementRef,\n  EventEmitter,\n  forwardRef,\n  Inject,\n  Input,\n  OnDestroy,\n  Optional,\n  Output,\n  ViewChild,\n  ViewEncapsulation,\n  NgZone,\n  AfterViewInit,\n} from '@angular/core';\nimport {ControlValueAccessor, NG_VALUE_ACCESSOR} from '@angular/forms';\nimport {\n  CanColor,\n  CanColorCtor,\n  CanDisable,\n  CanDisableCtor,\n  HasTabIndex,\n  HasTabIndexCtor,\n  mixinColor,\n  mixinDisabled,\n  mixinTabIndex,\n} from '@angular/material/core';\nimport {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';\nimport {normalizePassiveListenerOptions} from '@angular/cdk/platform';\nimport {DOCUMENT} from '@angular/common';\nimport {Subscription} from 'rxjs';\n\nconst activeEventOptions = normalizePassiveListenerOptions({passive: false});\n\n/**\n * Visually, a 30px separation between tick marks looks best. This is very subjective but it is\n * the default separation we chose.\n */\nconst MIN_AUTO_TICK_SEPARATION = 30;\n\n/** The thumb gap size for a disabled slider. */\nconst DISABLED_THUMB_GAP = 7;\n\n/** The thumb gap size for a non-active slider at its minimum value. */\nconst MIN_VALUE_NONACTIVE_THUMB_GAP = 7;\n\n/** The thumb gap size for an active slider at its minimum value. */\nconst MIN_VALUE_ACTIVE_THUMB_GAP = 10;\n\n/**\n * Provider Expression that allows mat-slider to register as a ControlValueAccessor.\n * This allows it to support [(ngModel)] and [formControl].\n * @docs-private\n */\nexport const MAT_SLIDER_VALUE_ACCESSOR: any = {\n  provide: NG_VALUE_ACCESSOR,\n  useExisting: forwardRef(() => MatSlider),\n  multi: true\n};\n\n/** A simple change event emitted by the MatSlider component. */\nexport class MatSliderChange {\n  /** The MatSlider that changed. */\n  source: MatSlider;\n\n  /** The new value of the source slider. */\n  value: number | null;\n}\n\n// Boilerplate for applying mixins to MatSlider.\n/** @docs-private */\nclass MatSliderBase {\n  constructor(public _elementRef: ElementRef) {}\n}\nconst _MatSliderMixinBase:\n    HasTabIndexCtor &\n    CanColorCtor &\n    CanDisableCtor &\n    typeof MatSliderBase =\n        mixinTabIndex(mixinColor(mixinDisabled(MatSliderBase), 'accent'));\n\n/**\n * Allows users to select from a range of values by moving the slider thumb. It is similar in\n * behavior to the native `<input type=\"range\">` element.\n */\n@Component({\n  selector: 'mat-slider',\n  exportAs: 'matSlider',\n  providers: [MAT_SLIDER_VALUE_ACCESSOR],\n  host: {\n    '(focus)': '_onFocus()',\n    '(blur)': '_onBlur()',\n    '(keydown)': '_onKeydown($event)',\n    '(keyup)': '_onKeyup()',\n    '(mouseenter)': '_onMouseenter()',\n\n    // On Safari starting to slide temporarily triggers text selection mode which\n    // show the wrong cursor. We prevent it by stopping the `selectstart` event.\n    '(selectstart)': '$event.preventDefault()',\n    'class': 'mat-slider mat-focus-indicator',\n    'role': 'slider',\n    '[tabIndex]': 'tabIndex',\n    '[attr.aria-disabled]': 'disabled',\n    '[attr.aria-valuemax]': 'max',\n    '[attr.aria-valuemin]': 'min',\n    '[attr.aria-valuenow]': 'value',\n    '[attr.aria-orientation]': 'vertical ? \"vertical\" : \"horizontal\"',\n    '[class.mat-slider-disabled]': 'disabled',\n    '[class.mat-slider-has-ticks]': 'tickInterval',\n    '[class.mat-slider-horizontal]': '!vertical',\n    '[class.mat-slider-axis-inverted]': '_shouldInvertAxis()',\n    // Class binding which is only used by the test harness as there is no other\n    // way for the harness to detect if mouse coordinates need to be inverted.\n    '[class.mat-slider-invert-mouse-coords]': '_shouldInvertMouseCoords()',\n    '[class.mat-slider-sliding]': '_isSliding',\n    '[class.mat-slider-thumb-label-showing]': 'thumbLabel',\n    '[class.mat-slider-vertical]': 'vertical',\n    '[class.mat-slider-min-value]': '_isMinValue()',\n    '[class.mat-slider-hide-last-tick]':\n        'disabled || _isMinValue() && _getThumbGap() && _shouldInvertAxis()',\n    '[class._mat-animation-noopable]': '_animationMode === \"NoopAnimations\"',\n  },\n  templateUrl: 'slider.html',\n  styleUrls: ['slider.css'],\n  inputs: ['disabled', 'color', 'tabIndex'],\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n})\nexport class MatSlider extends _MatSliderMixinBase\n    implements ControlValueAccessor, OnDestroy, CanDisable, CanColor, AfterViewInit, HasTabIndex {\n  /** Whether the slider is inverted. */\n  @Input()\n  get invert(): boolean { return this._invert; }\n  set invert(value: boolean) {\n    this._invert = coerceBooleanProperty(value);\n  }\n  private _invert = false;\n\n  /** The maximum value that the slider can have. */\n  @Input()\n  get max(): number { return this._max; }\n  set max(v: number) {\n    this._max = coerceNumberProperty(v, this._max);\n    this._percent = this._calculatePercentage(this._value);\n\n    // Since this also modifies the percentage, we need to let the change detection know.\n    this._changeDetectorRef.markForCheck();\n  }\n  private _max: number = 100;\n\n  /** The minimum value that the slider can have. */\n  @Input()\n  get min(): number { return this._min; }\n  set min(v: number) {\n    this._min = coerceNumberProperty(v, this._min);\n\n    // If the value wasn't explicitly set by the user, set it to the min.\n    if (this._value === null) {\n      this.value = this._min;\n    }\n    this._percent = this._calculatePercentage(this._value);\n\n    // Since this also modifies the percentage, we need to let the change detection know.\n    this._changeDetectorRef.markForCheck();\n  }\n  private _min: number = 0;\n\n  /** The values at which the thumb will snap. */\n  @Input()\n  get step(): number { return this._step; }\n  set step(v: number) {\n    this._step = coerceNumberProperty(v, this._step);\n\n    if (this._step % 1 !== 0) {\n      this._roundToDecimal = this._step.toString().split('.').pop()!.length;\n    }\n\n    // Since this could modify the label, we need to notify the change detection.\n    this._changeDetectorRef.markForCheck();\n  }\n  private _step: number = 1;\n\n  /** Whether or not to show the thumb label. */\n  @Input()\n  get thumbLabel(): boolean { return this._thumbLabel; }\n  set thumbLabel(value: boolean) { this._thumbLabel = coerceBooleanProperty(value); }\n  private _thumbLabel: boolean = false;\n\n  /**\n   * How often to show ticks. Relative to the step so that a tick always appears on a step.\n   * Ex: Tick interval of 4 with a step of 3 will draw a tick every 4 steps (every 12 values).\n   */\n  @Input()\n  get tickInterval() { return this._tickInterval; }\n  set tickInterval(value: 'auto' | number) {\n    if (value === 'auto') {\n      this._tickInterval = 'auto';\n    } else if (typeof value === 'number' || typeof value === 'string') {\n      this._tickInterval = coerceNumberProperty(value, this._tickInterval as number);\n    } else {\n      this._tickInterval = 0;\n    }\n  }\n  private _tickInterval: 'auto' | number = 0;\n\n  /** Value of the slider. */\n  @Input()\n  get value(): number | null {\n    // If the value needs to be read and it is still uninitialized, initialize it to the min.\n    if (this._value === null) {\n      this.value = this._min;\n    }\n    return this._value;\n  }\n  set value(v: number | null) {\n    if (v !== this._value) {\n      let value = coerceNumberProperty(v);\n\n      // While incrementing by a decimal we can end up with values like 33.300000000000004.\n      // Truncate it to ensure that it matches the label and to make it easier to work with.\n      if (this._roundToDecimal) {\n        value = parseFloat(value.toFixed(this._roundToDecimal));\n      }\n\n      this._value = value;\n      this._percent = this._calculatePercentage(this._value);\n\n      // Since this also modifies the percentage, we need to let the change detection know.\n      this._changeDetectorRef.markForCheck();\n    }\n  }\n  private _value: number | null = null;\n\n  /**\n   * Function that will be used to format the value before it is displayed\n   * in the thumb label. Can be used to format very large number in order\n   * for them to fit into the slider thumb.\n   */\n  @Input() displayWith: (value: number) => string | number;\n\n  /** Whether the slider is vertical. */\n  @Input()\n  get vertical(): boolean { return this._vertical; }\n  set vertical(value: boolean) {\n    this._vertical = coerceBooleanProperty(value);\n  }\n  private _vertical = false;\n\n  /** Event emitted when the slider value has changed. */\n  @Output() readonly change: EventEmitter<MatSliderChange> = new EventEmitter<MatSliderChange>();\n\n  /** Event emitted when the slider thumb moves. */\n  @Output() readonly input: EventEmitter<MatSliderChange> = new EventEmitter<MatSliderChange>();\n\n  /**\n   * Emits when the raw value of the slider changes. This is here primarily\n   * to facilitate the two-way binding for the `value` input.\n   * @docs-private\n   */\n  @Output() readonly valueChange: EventEmitter<number | null> = new EventEmitter<number | null>();\n\n  /** The value to be used for display purposes. */\n  get displayValue(): string | number {\n    if (this.displayWith) {\n      // Value is never null but since setters and getters cannot have\n      // different types, the value getter is also typed to return null.\n      return this.displayWith(this.value!);\n    }\n\n    // Note that this could be improved further by rounding something like 0.999 to 1 or\n    // 0.899 to 0.9, however it is very performance sensitive, because it gets called on\n    // every change detection cycle.\n    if (this._roundToDecimal && this.value && this.value % 1 !== 0) {\n      return this.value.toFixed(this._roundToDecimal);\n    }\n\n    return this.value || 0;\n  }\n\n  /** set focus to the host element */\n  focus(options?: FocusOptions) {\n    this._focusHostElement(options);\n  }\n\n  /** blur the host element */\n  blur() {\n    this._blurHostElement();\n  }\n\n  /** onTouch function registered via registerOnTouch (ControlValueAccessor). */\n  onTouched: () => any = () => {};\n\n  /** The percentage of the slider that coincides with the value. */\n  get percent(): number { return this._clamp(this._percent); }\n  private _percent: number = 0;\n\n  /**\n   * Whether or not the thumb is sliding.\n   * Used to determine if there should be a transition for the thumb and fill track.\n   */\n  _isSliding: boolean = false;\n\n  /**\n   * Whether or not the slider is active (clicked or sliding).\n   * Used to shrink and grow the thumb as according to the Material Design spec.\n   */\n  _isActive: boolean = false;\n\n  /**\n   * Whether the axis of the slider is inverted.\n   * (i.e. whether moving the thumb in the positive x or y direction decreases the slider's value).\n   */\n  _shouldInvertAxis() {\n    // Standard non-inverted mode for a vertical slider should be dragging the thumb from bottom to\n    // top. However from a y-axis standpoint this is inverted.\n    return this.vertical ? !this.invert : this.invert;\n  }\n\n\n  /** Whether the slider is at its minimum value. */\n  _isMinValue() {\n    return this.percent === 0;\n  }\n\n  /**\n   * The amount of space to leave between the slider thumb and the track fill & track background\n   * elements.\n   */\n  _getThumbGap() {\n    if (this.disabled) {\n      return DISABLED_THUMB_GAP;\n    }\n    if (this._isMinValue() && !this.thumbLabel) {\n      return this._isActive ? MIN_VALUE_ACTIVE_THUMB_GAP : MIN_VALUE_NONACTIVE_THUMB_GAP;\n    }\n    return 0;\n  }\n\n  /** CSS styles for the track background element. */\n  _getTrackBackgroundStyles(): { [key: string]: string } {\n    const axis = this.vertical ? 'Y' : 'X';\n    const scale = this.vertical ? `1, ${1 - this.percent}, 1` : `${1 - this.percent}, 1, 1`;\n    const sign = this._shouldInvertMouseCoords() ? '-' : '';\n\n    return {\n      // scale3d avoids some rendering issues in Chrome. See #12071.\n      transform: `translate${axis}(${sign}${this._getThumbGap()}px) scale3d(${scale})`\n    };\n  }\n\n  /** CSS styles for the track fill element. */\n  _getTrackFillStyles(): { [key: string]: string } {\n    const percent = this.percent;\n    const axis = this.vertical ? 'Y' : 'X';\n    const scale = this.vertical ? `1, ${percent}, 1` : `${percent}, 1, 1`;\n    const sign = this._shouldInvertMouseCoords() ? '' : '-';\n\n    return {\n      // scale3d avoids some rendering issues in Chrome. See #12071.\n      transform: `translate${axis}(${sign}${this._getThumbGap()}px) scale3d(${scale})`,\n      // iOS Safari has a bug where it won't re-render elements which start of as `scale(0)` until\n      // something forces a style recalculation on it. Since we'll end up with `scale(0)` when\n      // the value of the slider is 0, we can easily get into this situation. We force a\n      // recalculation by changing the element's `display` when it goes from 0 to any other value.\n      display: percent === 0 ? 'none' : ''\n    };\n  }\n\n  /** CSS styles for the ticks container element. */\n  _getTicksContainerStyles(): { [key: string]: string } {\n    let axis = this.vertical ? 'Y' : 'X';\n    // For a horizontal slider in RTL languages we push the ticks container off the left edge\n    // instead of the right edge to avoid causing a horizontal scrollbar to appear.\n    let sign = !this.vertical && this._getDirection() == 'rtl' ? '' : '-';\n    let offset = this._tickIntervalPercent / 2 * 100;\n    return {\n      'transform': `translate${axis}(${sign}${offset}%)`\n    };\n  }\n\n  /** CSS styles for the ticks element. */\n  _getTicksStyles(): { [key: string]: string } {\n    let tickSize = this._tickIntervalPercent * 100;\n    let backgroundSize = this.vertical ? `2px ${tickSize}%` : `${tickSize}% 2px`;\n    let axis = this.vertical ? 'Y' : 'X';\n    // Depending on the direction we pushed the ticks container, push the ticks the opposite\n    // direction to re-center them but clip off the end edge. In RTL languages we need to flip the\n    // ticks 180 degrees so we're really cutting off the end edge abd not the start.\n    let sign = !this.vertical && this._getDirection() == 'rtl' ? '-' : '';\n    let rotate = !this.vertical && this._getDirection() == 'rtl' ? ' rotate(180deg)' : '';\n    let styles: { [key: string]: string } = {\n      'backgroundSize': backgroundSize,\n      // Without translateZ ticks sometimes jitter as the slider moves on Chrome & Firefox.\n      'transform': `translateZ(0) translate${axis}(${sign}${tickSize / 2}%)${rotate}`\n    };\n\n    if (this._isMinValue() && this._getThumbGap()) {\n      const shouldInvertAxis = this._shouldInvertAxis();\n      let side: string;\n\n      if (this.vertical) {\n        side = shouldInvertAxis ? 'Bottom' : 'Top';\n      } else {\n        side = shouldInvertAxis ? 'Right' : 'Left';\n      }\n\n      styles[`padding${side}`] = `${this._getThumbGap()}px`;\n    }\n\n    return styles;\n  }\n\n  _getThumbContainerStyles(): { [key: string]: string } {\n    const shouldInvertAxis = this._shouldInvertAxis();\n    let axis = this.vertical ? 'Y' : 'X';\n    // For a horizontal slider in RTL languages we push the thumb container off the left edge\n    // instead of the right edge to avoid causing a horizontal scrollbar to appear.\n    let invertOffset =\n        (this._getDirection() == 'rtl' && !this.vertical) ? !shouldInvertAxis : shouldInvertAxis;\n    let offset = (invertOffset ? this.percent : 1 - this.percent) * 100;\n    return {\n      'transform': `translate${axis}(-${offset}%)`\n    };\n  }\n\n  /** The size of a tick interval as a percentage of the size of the track. */\n  private _tickIntervalPercent: number = 0;\n\n  /** The dimensions of the slider. */\n  private _sliderDimensions: ClientRect | null = null;\n\n  private _controlValueAccessorChangeFn: (value: any) => void = () => {};\n\n  /** Decimal places to round to, based on the step amount. */\n  private _roundToDecimal: number;\n\n  /** Subscription to the Directionality change EventEmitter. */\n  private _dirChangeSubscription = Subscription.EMPTY;\n\n  /** The value of the slider when the slide start event fires. */\n  private _valueOnSlideStart: number | null;\n\n  /** Reference to the inner slider wrapper element. */\n  @ViewChild('sliderWrapper') private _sliderWrapper: ElementRef;\n\n  /**\n   * Whether mouse events should be converted to a slider position by calculating their distance\n   * from the right or bottom edge of the slider as opposed to the top or left.\n   */\n  _shouldInvertMouseCoords() {\n    const shouldInvertAxis = this._shouldInvertAxis();\n    return (this._getDirection() == 'rtl' && !this.vertical) ? !shouldInvertAxis : shouldInvertAxis;\n  }\n\n  /** The language direction for this slider element. */\n  private _getDirection() {\n    return (this._dir && this._dir.value == 'rtl') ? 'rtl' : 'ltr';\n  }\n\n  /** Keeps track of the last pointer event that was captured by the slider. */\n  private _lastPointerEvent: MouseEvent | TouchEvent | null;\n\n  /** Used to subscribe to global move and end events */\n  protected _document: Document;\n\n  constructor(elementRef: ElementRef,\n              private _focusMonitor: FocusMonitor,\n              private _changeDetectorRef: ChangeDetectorRef,\n              @Optional() private _dir: Directionality,\n              @Attribute('tabindex') tabIndex: string,\n              private _ngZone: NgZone,\n              @Inject(DOCUMENT) _document: any,\n              @Optional() @Inject(ANIMATION_MODULE_TYPE) public _animationMode?: string) {\n    super(elementRef);\n    this._document = _document;\n    this.tabIndex = parseInt(tabIndex) || 0;\n\n    _ngZone.runOutsideAngular(() => {\n      const element = elementRef.nativeElement;\n      element.addEventListener('mousedown', this._pointerDown, activeEventOptions);\n      element.addEventListener('touchstart', this._pointerDown, activeEventOptions);\n    });\n  }\n\n  ngAfterViewInit() {\n    this._focusMonitor\n        .monitor(this._elementRef, true)\n        .subscribe((origin: FocusOrigin) => {\n          this._isActive = !!origin && origin !== 'keyboard';\n          this._changeDetectorRef.detectChanges();\n        });\n    if (this._dir) {\n      this._dirChangeSubscription = this._dir.change.subscribe(() => {\n        this._changeDetectorRef.markForCheck();\n      });\n    }\n  }\n\n  ngOnDestroy() {\n    const element = this._elementRef.nativeElement;\n    element.removeEventListener('mousedown', this._pointerDown, activeEventOptions);\n    element.removeEventListener('touchstart', this._pointerDown, activeEventOptions);\n    this._lastPointerEvent = null;\n    this._removeGlobalEvents();\n    this._focusMonitor.stopMonitoring(this._elementRef);\n    this._dirChangeSubscription.unsubscribe();\n  }\n\n  _onMouseenter() {\n    if (this.disabled) {\n      return;\n    }\n\n    // We save the dimensions of the slider here so we can use them to update the spacing of the\n    // ticks and determine where on the slider click and slide events happen.\n    this._sliderDimensions = this._getSliderDimensions();\n    this._updateTickIntervalPercent();\n  }\n\n  _onFocus() {\n    // We save the dimensions of the slider here so we can use them to update the spacing of the\n    // ticks and determine where on the slider click and slide events happen.\n    this._sliderDimensions = this._getSliderDimensions();\n    this._updateTickIntervalPercent();\n  }\n\n  _onBlur() {\n    this.onTouched();\n  }\n\n  _onKeydown(event: KeyboardEvent) {\n    if (this.disabled || hasModifierKey(event)) {\n      return;\n    }\n\n    const oldValue = this.value;\n\n    switch (event.keyCode) {\n      case PAGE_UP:\n        this._increment(10);\n        break;\n      case PAGE_DOWN:\n        this._increment(-10);\n        break;\n      case END:\n        this.value = this.max;\n        break;\n      case HOME:\n        this.value = this.min;\n        break;\n      case LEFT_ARROW:\n        // NOTE: For a sighted user it would make more sense that when they press an arrow key on an\n        // inverted slider the thumb moves in that direction. However for a blind user, nothing\n        // about the slider indicates that it is inverted. They will expect left to be decrement,\n        // regardless of how it appears on the screen. For speakers ofRTL languages, they probably\n        // expect left to mean increment. Therefore we flip the meaning of the side arrow keys for\n        // RTL. For inverted sliders we prefer a good a11y experience to having it \"look right\" for\n        // sighted users, therefore we do not swap the meaning.\n        this._increment(this._getDirection() == 'rtl' ? 1 : -1);\n        break;\n      case UP_ARROW:\n        this._increment(1);\n        break;\n      case RIGHT_ARROW:\n        // See comment on LEFT_ARROW about the conditions under which we flip the meaning.\n        this._increment(this._getDirection() == 'rtl' ? -1 : 1);\n        break;\n      case DOWN_ARROW:\n        this._increment(-1);\n        break;\n      default:\n        // Return if the key is not one that we explicitly handle to avoid calling preventDefault on\n        // it.\n        return;\n    }\n\n    if (oldValue != this.value) {\n      this._emitInputEvent();\n      this._emitChangeEvent();\n    }\n\n    this._isSliding = true;\n    event.preventDefault();\n  }\n\n  _onKeyup() {\n    this._isSliding = false;\n  }\n\n  /** Called when the user has put their pointer down on the slider. */\n  private _pointerDown = (event: TouchEvent | MouseEvent) => {\n    // Don't do anything if the slider is disabled or the\n    // user is using anything other than the main mouse button.\n    if (this.disabled || this._isSliding || (!isTouchEvent(event) && event.button !== 0)) {\n      return;\n    }\n\n    this._ngZone.run(() => {\n      const oldValue = this.value;\n      const pointerPosition = getPointerPositionOnPage(event);\n      this._isSliding = true;\n      this._lastPointerEvent = event;\n      event.preventDefault();\n      this._focusHostElement();\n      this._onMouseenter(); // Simulate mouseenter in case this is a mobile device.\n      this._bindGlobalEvents(event);\n      this._focusHostElement();\n      this._updateValueFromPosition(pointerPosition);\n      this._valueOnSlideStart = oldValue;\n\n      // Emit a change and input event if the value changed.\n      if (oldValue != this.value) {\n        this._emitInputEvent();\n      }\n    });\n  }\n\n  /**\n   * Called when the user has moved their pointer after\n   * starting to drag. Bound on the document level.\n   */\n  private _pointerMove = (event: TouchEvent | MouseEvent) => {\n    if (this._isSliding) {\n      // Prevent the slide from selecting anything else.\n      event.preventDefault();\n      const oldValue = this.value;\n      this._lastPointerEvent = event;\n      this._updateValueFromPosition(getPointerPositionOnPage(event));\n\n      // Native range elements always emit `input` events when the value changed while sliding.\n      if (oldValue != this.value) {\n        this._emitInputEvent();\n      }\n    }\n  }\n\n  /** Called when the user has lifted their pointer. Bound on the document level. */\n  private _pointerUp = (event: TouchEvent | MouseEvent) => {\n    if (this._isSliding) {\n      event.preventDefault();\n      this._removeGlobalEvents();\n      this._isSliding = false;\n\n      if (this._valueOnSlideStart != this.value && !this.disabled) {\n        this._emitChangeEvent();\n      }\n\n      this._valueOnSlideStart = this._lastPointerEvent = null;\n    }\n  }\n\n  /** Called when the window has lost focus. */\n  private _windowBlur = () => {\n    // If the window is blurred while dragging we need to stop dragging because the\n    // browser won't dispatch the `mouseup` and `touchend` events anymore.\n    if (this._lastPointerEvent) {\n      this._pointerUp(this._lastPointerEvent);\n    }\n  }\n\n  /** Use defaultView of injected document if available or fallback to global window reference */\n  private _getWindow(): Window {\n    return this._document.defaultView || window;\n  }\n\n  /**\n   * Binds our global move and end events. They're bound at the document level and only while\n   * dragging so that the user doesn't have to keep their pointer exactly over the slider\n   * as they're swiping across the screen.\n   */\n  private _bindGlobalEvents(triggerEvent: TouchEvent | MouseEvent) {\n    // Note that we bind the events to the `document`, because it allows us to capture\n    // drag cancel events where the user's pointer is outside the browser window.\n    const document = this._document;\n    const isTouch = isTouchEvent(triggerEvent);\n    const moveEventName = isTouch ? 'touchmove' : 'mousemove';\n    const endEventName = isTouch ? 'touchend' : 'mouseup';\n    document.addEventListener(moveEventName, this._pointerMove, activeEventOptions);\n    document.addEventListener(endEventName, this._pointerUp, activeEventOptions);\n\n    if (isTouch) {\n      document.addEventListener('touchcancel', this._pointerUp, activeEventOptions);\n    }\n\n    const window = this._getWindow();\n\n    if (typeof window !== 'undefined' && window) {\n      window.addEventListener('blur', this._windowBlur);\n    }\n  }\n\n  /** Removes any global event listeners that we may have added. */\n  private _removeGlobalEvents() {\n    const document = this._document;\n    document.removeEventListener('mousemove', this._pointerMove, activeEventOptions);\n    document.removeEventListener('mouseup', this._pointerUp, activeEventOptions);\n    document.removeEventListener('touchmove', this._pointerMove, activeEventOptions);\n    document.removeEventListener('touchend', this._pointerUp, activeEventOptions);\n    document.removeEventListener('touchcancel', this._pointerUp, activeEventOptions);\n\n    const window = this._getWindow();\n\n    if (typeof window !== 'undefined' && window) {\n      window.removeEventListener('blur', this._windowBlur);\n    }\n  }\n\n  /** Increments the slider by the given number of steps (negative number decrements). */\n  private _increment(numSteps: number) {\n    this.value = this._clamp((this.value || 0) + this.step * numSteps, this.min, this.max);\n  }\n\n  /** Calculate the new value from the new physical location. The value will always be snapped. */\n  private _updateValueFromPosition(pos: {x: number, y: number}) {\n    if (!this._sliderDimensions) {\n      return;\n    }\n\n    let offset = this.vertical ? this._sliderDimensions.top : this._sliderDimensions.left;\n    let size = this.vertical ? this._sliderDimensions.height : this._sliderDimensions.width;\n    let posComponent = this.vertical ? pos.y : pos.x;\n\n    // The exact value is calculated from the event and used to find the closest snap value.\n    let percent = this._clamp((posComponent - offset) / size);\n\n    if (this._shouldInvertMouseCoords()) {\n      percent = 1 - percent;\n    }\n\n    // Since the steps may not divide cleanly into the max value, if the user\n    // slid to 0 or 100 percent, we jump to the min/max value. This approach\n    // is slightly more intuitive than using `Math.ceil` below, because it\n    // follows the user's pointer closer.\n    if (percent === 0) {\n      this.value = this.min;\n    } else if (percent === 1) {\n      this.value = this.max;\n    } else {\n      const exactValue = this._calculateValue(percent);\n\n      // This calculation finds the closest step by finding the closest\n      // whole number divisible by the step relative to the min.\n      const closestValue = Math.round((exactValue - this.min) / this.step) * this.step + this.min;\n\n      // The value needs to snap to the min and max.\n      this.value = this._clamp(closestValue, this.min, this.max);\n    }\n  }\n\n  /** Emits a change event if the current value is different from the last emitted value. */\n  private _emitChangeEvent() {\n    this._controlValueAccessorChangeFn(this.value);\n    this.valueChange.emit(this.value);\n    this.change.emit(this._createChangeEvent());\n  }\n\n  /** Emits an input event when the current value is different from the last emitted value. */\n  private _emitInputEvent() {\n    this.input.emit(this._createChangeEvent());\n  }\n\n  /** Updates the amount of space between ticks as a percentage of the width of the slider. */\n  private _updateTickIntervalPercent() {\n    if (!this.tickInterval || !this._sliderDimensions) {\n      return;\n    }\n\n    if (this.tickInterval == 'auto') {\n      let trackSize = this.vertical ? this._sliderDimensions.height : this._sliderDimensions.width;\n      let pixelsPerStep = trackSize * this.step / (this.max - this.min);\n      let stepsPerTick = Math.ceil(MIN_AUTO_TICK_SEPARATION / pixelsPerStep);\n      let pixelsPerTick = stepsPerTick * this.step;\n      this._tickIntervalPercent = pixelsPerTick / trackSize;\n    } else {\n      this._tickIntervalPercent = this.tickInterval * this.step / (this.max - this.min);\n    }\n  }\n\n  /** Creates a slider change object from the specified value. */\n  private _createChangeEvent(value = this.value): MatSliderChange {\n    let event = new MatSliderChange();\n\n    event.source = this;\n    event.value = value;\n\n    return event;\n  }\n\n  /** Calculates the percentage of the slider that a value is. */\n  private _calculatePercentage(value: number | null) {\n    return ((value || 0) - this.min) / (this.max - this.min);\n  }\n\n  /** Calculates the value a percentage of the slider corresponds to. */\n  private _calculateValue(percentage: number) {\n    return this.min + percentage * (this.max - this.min);\n  }\n\n  /** Return a number between two numbers. */\n  private _clamp(value: number, min = 0, max = 1) {\n    return Math.max(min, Math.min(value, max));\n  }\n\n  /**\n   * Get the bounding client rect of the slider track element.\n   * The track is used rather than the native element to ignore the extra space that the thumb can\n   * take up.\n   */\n  private _getSliderDimensions() {\n    return this._sliderWrapper ? this._sliderWrapper.nativeElement.getBoundingClientRect() : null;\n  }\n\n  /**\n   * Focuses the native element.\n   * Currently only used to allow a blur event to fire but will be used with keyboard input later.\n   */\n  private _focusHostElement(options?: FocusOptions) {\n    this._elementRef.nativeElement.focus(options);\n  }\n\n  /** Blurs the native element. */\n  private _blurHostElement() {\n    this._elementRef.nativeElement.blur();\n  }\n\n  /**\n   * Sets the model value. Implemented as part of ControlValueAccessor.\n   * @param value\n   */\n  writeValue(value: any) {\n    this.value = value;\n  }\n\n  /**\n   * Registers a callback to be triggered when the value has changed.\n   * Implemented as part of ControlValueAccessor.\n   * @param fn Callback to be registered.\n   */\n  registerOnChange(fn: (value: any) => void) {\n    this._controlValueAccessorChangeFn = fn;\n  }\n\n  /**\n   * Registers a callback to be triggered when the component is touched.\n   * Implemented as part of ControlValueAccessor.\n   * @param fn Callback to be registered.\n   */\n  registerOnTouched(fn: any) {\n    this.onTouched = fn;\n  }\n\n  /**\n   * Sets whether the component should be disabled.\n   * Implemented as part of ControlValueAccessor.\n   * @param isDisabled\n   */\n  setDisabledState(isDisabled: boolean) {\n    this.disabled = isDisabled;\n  }\n\n  static ngAcceptInputType_invert: BooleanInput;\n  static ngAcceptInputType_max: NumberInput;\n  static ngAcceptInputType_min: NumberInput;\n  static ngAcceptInputType_step: NumberInput;\n  static ngAcceptInputType_thumbLabel: BooleanInput;\n  static ngAcceptInputType_tickInterval: NumberInput;\n  static ngAcceptInputType_value: NumberInput;\n  static ngAcceptInputType_vertical: BooleanInput;\n  static ngAcceptInputType_disabled: BooleanInput;\n  static ngAcceptInputType_tabIndex: NumberInput;\n}\n\n/** Returns whether an event is a touch event. */\nfunction isTouchEvent(event: MouseEvent | TouchEvent): event is TouchEvent {\n  // This function is called for every pixel that the user has dragged so we need it to be\n  // as fast as possible. Since we only bind mouse events and touch events, we can assume\n  // that if the event's name starts with `t`, it's a touch event.\n  return event.type[0] === 't';\n}\n\n/** Gets the coordinates of a touch or mouse event relative to the viewport. */\nfunction getPointerPositionOnPage(event: MouseEvent | TouchEvent) {\n  // `touches` will be empty for start/end events so we have to fall back to `changedTouches`.\n  const point = isTouchEvent(event) ? (event.touches[0] || event.changedTouches[0]) : event;\n  return {x: point.clientX, y: point.clientY};\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {CommonModule} from '@angular/common';\nimport {NgModule} from '@angular/core';\nimport {MatCommonModule} from '@angular/material/core';\nimport {MatSlider} from './slider';\n\n\n@NgModule({\n  imports: [CommonModule, MatCommonModule],\n  exports: [MatSlider, MatCommonModule],\n  declarations: [MatSlider],\n})\nexport class MatSliderModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './slider-module';\nexport * from './slider';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar skipUntil_1 = require(\"../../operator/skipUntil\");\nrxjs_1.Observable.prototype.skipUntil = skipUntil_1.skipUntil;\n//# sourceMappingURL=skipUntil.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Emits the given constant value on the output Observable every time the source\n * Observable emits a value.\n *\n * <span class=\"informal\">Like {@link map}, but it maps every source value to\n * the same output value every time.</span>\n *\n * <img src=\"./img/mapTo.png\" width=\"100%\">\n *\n * Takes a constant `value` as argument, and emits that whenever the source\n * Observable emits a value. In other words, ignores the actual source value,\n * and simply uses the emission moment to know when to emit the given `value`.\n *\n * @example <caption>Map every click to the string 'Hi'</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var greetings = clicks.mapTo('Hi');\n * greetings.subscribe(x => console.log(x));\n *\n * @see {@link map}\n *\n * @param {any} value The value to map each source value to.\n * @return {Observable} An Observable that emits the given `value` every time\n * the source Observable emits something.\n * @method mapTo\n * @owner Observable\n */\nfunction mapTo(value) {\n    return operators_1.mapTo(value)(this);\n}\nexports.mapTo = mapTo;\n//# sourceMappingURL=mapTo.js.map","import { Observable } from '../Observable';\nimport { noop } from '../util/noop';\nexport const NEVER = new Observable(noop);\nexport function never() {\n    return NEVER;\n}\n//# sourceMappingURL=never.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar windowWhen_1 = require(\"../../operator/windowWhen\");\nrxjs_1.Observable.prototype.windowWhen = windowWhen_1.windowWhen;\n//# sourceMappingURL=windowWhen.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Returns an Observable that skips all items emitted by the source Observable as long as a specified condition holds\n * true, but emits all further source items as soon as the condition becomes false.\n *\n * <img src=\"./img/skipWhile.png\" width=\"100%\">\n *\n * @param {Function} predicate - A function to test each item emitted from the source Observable.\n * @return {Observable<T>} An Observable that begins emitting items emitted by the source Observable when the\n * specified predicate becomes false.\n * @method skipWhile\n * @owner Observable\n */\nfunction skipWhile(predicate) {\n    return operators_1.skipWhile(predicate)(this);\n}\nexports.skipWhile = skipWhile;\n//# sourceMappingURL=skipWhile.js.map","import { SimpleOuterSubscriber, innerSubscribe, SimpleInnerSubscriber } from '../innerSubscribe';\nexport function debounce(durationSelector) {\n    return (source) => source.lift(new DebounceOperator(durationSelector));\n}\nclass DebounceOperator {\n    constructor(durationSelector) {\n        this.durationSelector = durationSelector;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new DebounceSubscriber(subscriber, this.durationSelector));\n    }\n}\nclass DebounceSubscriber extends SimpleOuterSubscriber {\n    constructor(destination, durationSelector) {\n        super(destination);\n        this.durationSelector = durationSelector;\n        this.hasValue = false;\n    }\n    _next(value) {\n        try {\n            const result = this.durationSelector.call(this, value);\n            if (result) {\n                this._tryNext(value, result);\n            }\n        }\n        catch (err) {\n            this.destination.error(err);\n        }\n    }\n    _complete() {\n        this.emitValue();\n        this.destination.complete();\n    }\n    _tryNext(value, duration) {\n        let subscription = this.durationSubscription;\n        this.value = value;\n        this.hasValue = true;\n        if (subscription) {\n            subscription.unsubscribe();\n            this.remove(subscription);\n        }\n        subscription = innerSubscribe(duration, new SimpleInnerSubscriber(this));\n        if (subscription && !subscription.closed) {\n            this.add(this.durationSubscription = subscription);\n        }\n    }\n    notifyNext() {\n        this.emitValue();\n    }\n    notifyComplete() {\n        this.emitValue();\n    }\n    emitValue() {\n        if (this.hasValue) {\n            const value = this.value;\n            const subscription = this.durationSubscription;\n            if (subscription) {\n                this.durationSubscription = undefined;\n                subscription.unsubscribe();\n                this.remove(subscription);\n            }\n            this.value = undefined;\n            this.hasValue = false;\n            super._next(value);\n        }\n    }\n}\n//# sourceMappingURL=debounce.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Emits only the index of the first value emitted by the source Observable that\n * meets some condition.\n *\n * <span class=\"informal\">It's like {@link find}, but emits the index of the\n * found value, not the value itself.</span>\n *\n * <img src=\"./img/findIndex.png\" width=\"100%\">\n *\n * `findIndex` searches for the first item in the source Observable that matches\n * the specified condition embodied by the `predicate`, and returns the\n * (zero-based) index of the first occurrence in the source. Unlike\n * {@link first}, the `predicate` is required in `findIndex`, and does not emit\n * an error if a valid value is not found.\n *\n * @example <caption>Emit the index of first click that happens on a DIV element</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.findIndex(ev => ev.target.tagName === 'DIV');\n * result.subscribe(x => console.log(x));\n *\n * @see {@link filter}\n * @see {@link find}\n * @see {@link first}\n * @see {@link take}\n *\n * @param {function(value: T, index: number, source: Observable<T>): boolean} predicate\n * A function called with each item to test for condition matching.\n * @param {any} [thisArg] An optional argument to determine the value of `this`\n * in the `predicate` function.\n * @return {Observable} An Observable of the index of the first item that\n * matches the condition.\n * @method find\n * @owner Observable\n */\nfunction findIndex(predicate, thisArg) {\n    return operators_1.findIndex(predicate, thisArg)(this);\n}\nexports.findIndex = findIndex;\n//# sourceMappingURL=findIndex.js.map","import { Observable } from '../Observable';\nexport function isObservable(obj) {\n    return !!obj && (obj instanceof Observable || (typeof obj.lift === 'function' && typeof obj.subscribe === 'function'));\n}\n//# sourceMappingURL=isObservable.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar pairwise_1 = require(\"../../operator/pairwise\");\nrxjs_1.Observable.prototype.pairwise = pairwise_1.pairwise;\n//# sourceMappingURL=pairwise.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * The Max operator operates on an Observable that emits numbers (or items that can be compared with a provided function),\n * and when source Observable completes it emits a single item: the item with the largest value.\n *\n * <img src=\"./img/max.png\" width=\"100%\">\n *\n * @example <caption>Get the maximal value of a series of numbers</caption>\n * Rx.Observable.of(5, 4, 7, 2, 8)\n *   .max()\n *   .subscribe(x => console.log(x)); // -> 8\n *\n * @example <caption>Use a comparer function to get the maximal item</caption>\n * interface Person {\n *   age: number,\n *   name: string\n * }\n * Observable.of<Person>({age: 7, name: 'Foo'},\n *                       {age: 5, name: 'Bar'},\n *                       {age: 9, name: 'Beer'})\n *           .max<Person>((a: Person, b: Person) => a.age < b.age ? -1 : 1)\n *           .subscribe((x: Person) => console.log(x.name)); // -> 'Beer'\n * }\n *\n * @see {@link min}\n *\n * @param {Function} [comparer] - Optional comparer function that it will use instead of its default to compare the\n * value of two items.\n * @return {Observable} An Observable that emits item with the largest value.\n * @method max\n * @owner Observable\n */\nfunction max(comparer) {\n    return operators_1.max(comparer)(this);\n}\nexports.max = max;\n//# sourceMappingURL=max.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar exhaustMap_1 = require(\"../../operator/exhaustMap\");\nrxjs_1.Observable.prototype.exhaustMap = exhaustMap_1.exhaustMap;\n//# sourceMappingURL=exhaustMap.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Projects each source value to an Observable which is merged in the output\n * Observable only if the previous projected Observable has completed.\n *\n * <span class=\"informal\">Maps each value to an Observable, then flattens all of\n * these inner Observables using {@link exhaust}.</span>\n *\n * <img src=\"./img/exhaustMap.png\" width=\"100%\">\n *\n * Returns an Observable that emits items based on applying a function that you\n * supply to each item emitted by the source Observable, where that function\n * returns an (so-called \"inner\") Observable. When it projects a source value to\n * an Observable, the output Observable begins emitting the items emitted by\n * that projected Observable. However, `exhaustMap` ignores every new projected\n * Observable if the previous projected Observable has not yet completed. Once\n * that one completes, it will accept and flatten the next projected Observable\n * and repeat this process.\n *\n * @example <caption>Run a finite timer for each click, only if there is no currently active timer</caption>\n * var clicks = fromEvent(document, 'click');\n * var result = clicks.pipe(exhaustMap((ev) => Rx.Observable.interval(1000).take(5)));\n * result.subscribe(x => console.log(x));\n *\n * @see {@link concatMap}\n * @see {@link exhaust}\n * @see {@link mergeMap}\n * @see {@link switchMap}\n *\n * @param {function(value: T, ?index: number): ObservableInput} project A function\n * that, when applied to an item emitted by the source Observable, returns an\n * Observable.\n * @return {Observable} An Observable containing projected Observables\n * of each item of the source, ignoring projected Observables that start before\n * their preceding Observable has completed.\n */\nfunction exhaustMap(project) {\n    return operators_1.exhaustMap(project)(this);\n}\nexports.exhaustMap = exhaustMap;\n//# sourceMappingURL=exhaustMap.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {InjectionToken} from '@angular/core';\nimport {CdkAccordion} from '@angular/cdk/accordion';\n\n/** MatAccordion's display modes. */\nexport type MatAccordionDisplayMode = 'default' | 'flat';\n\n/** MatAccordion's toggle positions. */\nexport type MatAccordionTogglePosition = 'before' | 'after';\n\n/**\n * Base interface for a `MatAccordion`.\n * @docs-private\n */\nexport interface MatAccordionBase extends CdkAccordion {\n  /** Whether the expansion indicator should be hidden. */\n  hideToggle: boolean;\n\n  /** Display mode used for all expansion panels in the accordion. */\n  displayMode: MatAccordionDisplayMode;\n\n  /** The position of the expansion indicator. */\n  togglePosition: MatAccordionTogglePosition;\n\n  /** Handles keyboard events coming in from the panel headers. */\n  _handleHeaderKeydown: (event: KeyboardEvent) => void;\n\n  /** Handles focus events on the panel headers. */\n  _handleHeaderFocus: (header: any) => void;\n}\n\n\n/**\n * Token used to provide a `MatAccordion` to `MatExpansionPanel`.\n * Used primarily to avoid circular imports between `MatAccordion` and `MatExpansionPanel`.\n */\nexport const MAT_ACCORDION = new InjectionToken<MatAccordionBase>('MAT_ACCORDION');\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {\n  animate,\n  AnimationTriggerMetadata,\n  state,\n  style,\n  transition,\n  trigger,\n} from '@angular/animations';\n\n/** Time and timing curve for expansion panel animations. */\n// Note: Keep this in sync with the Sass variable for the panel header animation.\nexport const EXPANSION_PANEL_ANIMATION_TIMING = '225ms cubic-bezier(0.4,0.0,0.2,1)';\n\n/**\n * Animations used by the Material expansion panel.\n *\n * A bug in angular animation's `state` when ViewContainers are moved using ViewContainerRef.move()\n * causes the animation state of moved components to become `void` upon exit, and not update again\n * upon reentry into the DOM.  This can lead a to situation for the expansion panel where the state\n * of the panel is `expanded` or `collapsed` but the animation state is `void`.\n *\n * To correctly handle animating to the next state, we animate between `void` and `collapsed` which\n * are defined to have the same styles. Since angular animates from the current styles to the\n * destination state's style definition, in situations where we are moving from `void`'s styles to\n * `collapsed` this acts a noop since no style values change.\n *\n * In the case where angular's animation state is out of sync with the expansion panel's state, the\n * expansion panel being `expanded` and angular animations being `void`, the animation from the\n * `expanded`'s effective styles (though in a `void` animation state) to the collapsed state will\n * occur as expected.\n *\n * Angular Bug: https://github.com/angular/angular/issues/18847\n *\n * @docs-private\n */\nexport const matExpansionAnimations: {\n  readonly indicatorRotate: AnimationTriggerMetadata;\n  readonly bodyExpansion: AnimationTriggerMetadata;\n} = {\n  /** Animation that rotates the indicator arrow. */\n  indicatorRotate: trigger('indicatorRotate', [\n    state('collapsed, void', style({transform: 'rotate(0deg)'})),\n    state('expanded', style({transform: 'rotate(180deg)'})),\n    transition('expanded <=> collapsed, void => collapsed',\n      animate(EXPANSION_PANEL_ANIMATION_TIMING)),\n  ]),\n  /** Animation that expands and collapses the panel content. */\n  bodyExpansion: trigger('bodyExpansion', [\n    state('collapsed, void', style({height: '0px', visibility: 'hidden'})),\n    state('expanded', style({height: '*', visibility: 'visible'})),\n    transition('expanded <=> collapsed, void => collapsed',\n      animate(EXPANSION_PANEL_ANIMATION_TIMING)),\n  ])\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, TemplateRef} from '@angular/core';\n\n/**\n * Expansion panel content that will be rendered lazily\n * after the panel is opened for the first time.\n */\n@Directive({\n  selector: 'ng-template[matExpansionPanelContent]'\n})\nexport class MatExpansionPanelContent {\n  constructor(public _template: TemplateRef<any>) {}\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {AnimationEvent} from '@angular/animations';\nimport {CdkAccordionItem} from '@angular/cdk/accordion';\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {UniqueSelectionDispatcher} from '@angular/cdk/collections';\nimport {TemplatePortal} from '@angular/cdk/portal';\nimport {DOCUMENT} from '@angular/common';\nimport {\n  AfterContentInit,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ContentChild,\n  Directive,\n  ElementRef,\n  EventEmitter,\n  Inject,\n  InjectionToken,\n  Input,\n  OnChanges,\n  OnDestroy,\n  Optional,\n  Output,\n  SimpleChanges,\n  SkipSelf,\n  ViewChild,\n  ViewContainerRef,\n  ViewEncapsulation,\n} from '@angular/core';\nimport {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';\nimport {Subject} from 'rxjs';\nimport {distinctUntilChanged, filter, startWith, take} from 'rxjs/operators';\nimport {MatAccordionBase, MatAccordionTogglePosition, MAT_ACCORDION} from './accordion-base';\nimport {matExpansionAnimations} from './expansion-animations';\nimport {MatExpansionPanelContent} from './expansion-panel-content';\n\n/** MatExpansionPanel's states. */\nexport type MatExpansionPanelState = 'expanded' | 'collapsed';\n\n/** Counter for generating unique element ids. */\nlet uniqueId = 0;\n\n/**\n * Object that can be used to override the default options\n * for all of the expansion panels in a module.\n */\nexport interface MatExpansionPanelDefaultOptions {\n  /** Height of the header while the panel is expanded. */\n  expandedHeight: string;\n\n  /** Height of the header while the panel is collapsed. */\n  collapsedHeight: string;\n\n  /** Whether the toggle indicator should be hidden. */\n  hideToggle: boolean;\n}\n\n/**\n * Injection token that can be used to configure the defalt\n * options for the expansion panel component.\n */\nexport const MAT_EXPANSION_PANEL_DEFAULT_OPTIONS =\n    new InjectionToken<MatExpansionPanelDefaultOptions>('MAT_EXPANSION_PANEL_DEFAULT_OPTIONS');\n\n/**\n * This component can be used as a single element to show expandable content, or as one of\n * multiple children of an element with the MatAccordion directive attached.\n */\n@Component({\n  styleUrls: ['expansion-panel.css'],\n  selector: 'mat-expansion-panel',\n  exportAs: 'matExpansionPanel',\n  templateUrl: 'expansion-panel.html',\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  inputs: ['disabled', 'expanded'],\n  outputs: ['opened', 'closed', 'expandedChange'],\n  animations: [matExpansionAnimations.bodyExpansion],\n  providers: [\n    // Provide MatAccordion as undefined to prevent nested expansion panels from registering\n    // to the same accordion.\n    {provide: MAT_ACCORDION, useValue: undefined},\n  ],\n  host: {\n    'class': 'mat-expansion-panel',\n    '[class.mat-expanded]': 'expanded',\n    '[class._mat-animation-noopable]': '_animationMode === \"NoopAnimations\"',\n    '[class.mat-expansion-panel-spacing]': '_hasSpacing()',\n  }\n})\nexport class MatExpansionPanel extends CdkAccordionItem implements AfterContentInit, OnChanges,\n  OnDestroy {\n  private _document: Document;\n  private _hideToggle = false;\n  private _togglePosition: MatAccordionTogglePosition;\n\n  /** Whether the toggle indicator should be hidden. */\n  @Input()\n  get hideToggle(): boolean {\n    return this._hideToggle || (this.accordion && this.accordion.hideToggle);\n  }\n  set hideToggle(value: boolean) {\n    this._hideToggle = coerceBooleanProperty(value);\n  }\n\n  /** The position of the expansion indicator. */\n  @Input()\n  get togglePosition(): MatAccordionTogglePosition {\n    return this._togglePosition || (this.accordion && this.accordion.togglePosition);\n  }\n  set togglePosition(value: MatAccordionTogglePosition) {\n    this._togglePosition = value;\n  }\n\n  /** An event emitted after the body's expansion animation happens. */\n  @Output() afterExpand = new EventEmitter<void>();\n\n  /** An event emitted after the body's collapse animation happens. */\n  @Output() afterCollapse = new EventEmitter<void>();\n\n  /** Stream that emits for changes in `@Input` properties. */\n  readonly _inputChanges = new Subject<SimpleChanges>();\n\n  /** Optionally defined accordion the expansion panel belongs to. */\n  accordion: MatAccordionBase;\n\n  /** Content that will be rendered lazily. */\n  @ContentChild(MatExpansionPanelContent) _lazyContent: MatExpansionPanelContent;\n\n  /** Element containing the panel's user-provided content. */\n  @ViewChild('body') _body: ElementRef<HTMLElement>;\n\n  /** Portal holding the user's content. */\n  _portal: TemplatePortal;\n\n  /** ID for the associated header element. Used for a11y labelling. */\n  _headerId = `mat-expansion-panel-header-${uniqueId++}`;\n\n  /** Stream of body animation done events. */\n  _bodyAnimationDone = new Subject<AnimationEvent>();\n\n  constructor(@Optional() @SkipSelf() @Inject(MAT_ACCORDION) accordion: MatAccordionBase,\n              _changeDetectorRef: ChangeDetectorRef,\n              _uniqueSelectionDispatcher: UniqueSelectionDispatcher,\n              private _viewContainerRef: ViewContainerRef,\n              @Inject(DOCUMENT) _document: any,\n              @Optional() @Inject(ANIMATION_MODULE_TYPE) public _animationMode: string,\n              @Inject(MAT_EXPANSION_PANEL_DEFAULT_OPTIONS) @Optional()\n                  defaultOptions?: MatExpansionPanelDefaultOptions) {\n    super(accordion, _changeDetectorRef, _uniqueSelectionDispatcher);\n    this.accordion = accordion;\n    this._document = _document;\n\n    // We need a Subject with distinctUntilChanged, because the `done` event\n    // fires twice on some browsers. See https://github.com/angular/angular/issues/24084\n    this._bodyAnimationDone.pipe(distinctUntilChanged((x, y) => {\n      return x.fromState === y.fromState && x.toState === y.toState;\n    })).subscribe(event => {\n      if (event.fromState !== 'void') {\n        if (event.toState === 'expanded') {\n          this.afterExpand.emit();\n        } else if (event.toState === 'collapsed') {\n          this.afterCollapse.emit();\n        }\n      }\n    });\n\n    if (defaultOptions) {\n      this.hideToggle = defaultOptions.hideToggle;\n    }\n  }\n\n  /** Determines whether the expansion panel should have spacing between it and its siblings. */\n  _hasSpacing(): boolean {\n    if (this.accordion) {\n      return this.expanded && this.accordion.displayMode === 'default';\n    }\n    return false;\n  }\n\n  /** Gets the expanded state string. */\n  _getExpandedState(): MatExpansionPanelState {\n    return this.expanded ? 'expanded' : 'collapsed';\n  }\n\n  /** Toggles the expanded state of the expansion panel. */\n  toggle(): void {\n    this.expanded = !this.expanded;\n  }\n\n  /** Sets the expanded state of the expansion panel to false. */\n  close(): void {\n    this.expanded = false;\n  }\n\n  /** Sets the expanded state of the expansion panel to true. */\n  open(): void {\n    this.expanded = true;\n  }\n\n  ngAfterContentInit() {\n    if (this._lazyContent) {\n      // Render the content as soon as the panel becomes open.\n      this.opened.pipe(\n        startWith(null!),\n        filter(() => this.expanded && !this._portal),\n        take(1)\n      ).subscribe(() => {\n        this._portal = new TemplatePortal(this._lazyContent._template, this._viewContainerRef);\n      });\n    }\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    this._inputChanges.next(changes);\n  }\n\n  ngOnDestroy() {\n    super.ngOnDestroy();\n    this._bodyAnimationDone.complete();\n    this._inputChanges.complete();\n  }\n\n  /** Checks whether the expansion panel's content contains the currently-focused element. */\n  _containsFocus(): boolean {\n    if (this._body) {\n      const focusedElement = this._document.activeElement;\n      const bodyElement = this._body.nativeElement;\n      return focusedElement === bodyElement || bodyElement.contains(focusedElement);\n    }\n\n    return false;\n  }\n\n  static ngAcceptInputType_hideToggle: BooleanInput;\n  static ngAcceptInputType_expanded: BooleanInput;\n  static ngAcceptInputType_disabled: BooleanInput;\n}\n\n/**\n * Actions of a `<mat-expansion-panel>`.\n */\n@Directive({\n  selector: 'mat-action-row',\n  host: {\n    class: 'mat-action-row'\n  }\n})\nexport class MatExpansionPanelActionRow {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {FocusableOption, FocusMonitor, FocusOrigin} from '@angular/cdk/a11y';\nimport {ENTER, hasModifierKey, SPACE} from '@angular/cdk/keycodes';\nimport {\n  AfterViewInit,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  Directive,\n  ElementRef,\n  Host,\n  Inject,\n  Input,\n  OnDestroy,\n  Optional,\n  ViewEncapsulation,\n} from '@angular/core';\nimport {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';\nimport {EMPTY, merge, Subscription} from 'rxjs';\nimport {filter} from 'rxjs/operators';\nimport {MatAccordionTogglePosition} from './accordion-base';\nimport {matExpansionAnimations} from './expansion-animations';\nimport {\n  MatExpansionPanel,\n  MatExpansionPanelDefaultOptions,\n  MAT_EXPANSION_PANEL_DEFAULT_OPTIONS,\n} from './expansion-panel';\n\n\n/**\n * Header element of a `<mat-expansion-panel>`.\n */\n@Component({\n  selector: 'mat-expansion-panel-header',\n  styleUrls: ['expansion-panel-header.css'],\n  templateUrl: 'expansion-panel-header.html',\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  animations: [\n    matExpansionAnimations.indicatorRotate,\n  ],\n  host: {\n    'class': 'mat-expansion-panel-header mat-focus-indicator',\n    'role': 'button',\n    '[attr.id]': 'panel._headerId',\n    '[attr.tabindex]': 'disabled ? -1 : 0',\n    '[attr.aria-controls]': '_getPanelId()',\n    '[attr.aria-expanded]': '_isExpanded()',\n    '[attr.aria-disabled]': 'panel.disabled',\n    '[class.mat-expanded]': '_isExpanded()',\n    '[class.mat-expansion-toggle-indicator-after]': `_getTogglePosition() === 'after'`,\n    '[class.mat-expansion-toggle-indicator-before]': `_getTogglePosition() === 'before'`,\n    '[class._mat-animation-noopable]': '_animationMode === \"NoopAnimations\"',\n    '[style.height]': '_getHeaderHeight()',\n    '(click)': '_toggle()',\n    '(keydown)': '_keydown($event)',\n  },\n})\nexport class MatExpansionPanelHeader implements AfterViewInit, OnDestroy, FocusableOption {\n  private _parentChangeSubscription = Subscription.EMPTY;\n\n  constructor(\n      @Host() public panel: MatExpansionPanel,\n      private _element: ElementRef,\n      private _focusMonitor: FocusMonitor,\n      private _changeDetectorRef: ChangeDetectorRef,\n      @Inject(MAT_EXPANSION_PANEL_DEFAULT_OPTIONS) @Optional()\n          defaultOptions?: MatExpansionPanelDefaultOptions,\n      @Optional() @Inject(ANIMATION_MODULE_TYPE) public _animationMode?: string) {\n    const accordionHideToggleChange = panel.accordion ?\n        panel.accordion._stateChanges.pipe(\n            filter(changes => !!(changes['hideToggle'] || changes['togglePosition']))) :\n        EMPTY;\n\n    // Since the toggle state depends on an @Input on the panel, we\n    // need to subscribe and trigger change detection manually.\n    this._parentChangeSubscription =\n        merge(\n            panel.opened, panel.closed, accordionHideToggleChange,\n            panel._inputChanges.pipe(filter(\n                changes => {\n                  return !!(\n                    changes['hideToggle'] ||\n                    changes['disabled'] ||\n                    changes['togglePosition']);\n                  })))\n    .subscribe(() => this._changeDetectorRef.markForCheck());\n\n    // Avoids focus being lost if the panel contained the focused element and was closed.\n    panel.closed\n      .pipe(filter(() => panel._containsFocus()))\n      .subscribe(() => _focusMonitor.focusVia(_element, 'program'));\n\n    if (defaultOptions) {\n      this.expandedHeight = defaultOptions.expandedHeight;\n      this.collapsedHeight = defaultOptions.collapsedHeight;\n    }\n  }\n\n  /** Height of the header while the panel is expanded. */\n  @Input() expandedHeight: string;\n\n  /** Height of the header while the panel is collapsed. */\n  @Input() collapsedHeight: string;\n\n  /**\n   * Whether the associated panel is disabled. Implemented as a part of `FocusableOption`.\n   * @docs-private\n   */\n  get disabled() {\n    return this.panel.disabled;\n  }\n\n  /** Toggles the expanded state of the panel. */\n  _toggle(): void {\n    if (!this.disabled) {\n      this.panel.toggle();\n    }\n  }\n\n  /** Gets whether the panel is expanded. */\n  _isExpanded(): boolean {\n    return this.panel.expanded;\n  }\n\n  /** Gets the expanded state string of the panel. */\n  _getExpandedState(): string {\n    return this.panel._getExpandedState();\n  }\n\n  /** Gets the panel id. */\n  _getPanelId(): string {\n    return this.panel.id;\n  }\n\n  /** Gets the toggle position for the header. */\n  _getTogglePosition(): MatAccordionTogglePosition {\n    return this.panel.togglePosition;\n  }\n\n  /** Gets whether the expand indicator should be shown. */\n  _showToggle(): boolean {\n    return !this.panel.hideToggle && !this.panel.disabled;\n  }\n\n  /**\n   * Gets the current height of the header. Null if no custom height has been\n   * specified, and if the default height from the stylesheet should be used.\n   */\n  _getHeaderHeight(): string|null {\n    const isExpanded = this._isExpanded();\n    if (isExpanded && this.expandedHeight) {\n      return this.expandedHeight;\n    } else if (!isExpanded && this.collapsedHeight) {\n      return this.collapsedHeight;\n    }\n    return null;\n  }\n\n  /** Handle keydown event calling to toggle() if appropriate. */\n  _keydown(event: KeyboardEvent) {\n    switch (event.keyCode) {\n      // Toggle for space and enter keys.\n      case SPACE:\n      case ENTER:\n        if (!hasModifierKey(event)) {\n          event.preventDefault();\n          this._toggle();\n        }\n\n        break;\n      default:\n        if (this.panel.accordion) {\n          this.panel.accordion._handleHeaderKeydown(event);\n        }\n\n        return;\n    }\n  }\n\n  /**\n   * Focuses the panel header. Implemented as a part of `FocusableOption`.\n   * @param origin Origin of the action that triggered the focus.\n   * @docs-private\n   */\n  focus(origin: FocusOrigin = 'program', options?: FocusOptions) {\n    this._focusMonitor.focusVia(this._element, origin, options);\n  }\n\n  ngAfterViewInit() {\n    this._focusMonitor.monitor(this._element).subscribe(origin => {\n      if (origin && this.panel.accordion) {\n        this.panel.accordion._handleHeaderFocus(this);\n      }\n    });\n  }\n\n  ngOnDestroy() {\n    this._parentChangeSubscription.unsubscribe();\n    this._focusMonitor.stopMonitoring(this._element);\n  }\n}\n\n/**\n * Description element of a `<mat-expansion-panel-header>`.\n */\n@Directive({\n  selector: 'mat-panel-description',\n  host: {\n    class: 'mat-expansion-panel-header-description'\n  }\n})\nexport class MatExpansionPanelDescription {}\n\n/**\n * Title element of a `<mat-expansion-panel-header>`.\n */\n@Directive({\n  selector: 'mat-panel-title',\n  host: {\n    class: 'mat-expansion-panel-header-title'\n  }\n})\nexport class MatExpansionPanelTitle {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, Input, ContentChildren, QueryList, AfterContentInit} from '@angular/core';\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {CdkAccordion} from '@angular/cdk/accordion';\nimport {FocusKeyManager} from '@angular/cdk/a11y';\nimport {startWith} from 'rxjs/operators';\nimport {\n  MAT_ACCORDION,\n  MatAccordionBase,\n  MatAccordionDisplayMode,\n  MatAccordionTogglePosition\n} from './accordion-base';\nimport {MatExpansionPanelHeader} from './expansion-panel-header';\n\n/**\n * Directive for a Material Design Accordion.\n */\n@Directive({\n  selector: 'mat-accordion',\n  exportAs: 'matAccordion',\n  inputs: ['multi'],\n  providers: [{\n    provide: MAT_ACCORDION,\n    useExisting: MatAccordion\n  }],\n  host: {\n    class: 'mat-accordion',\n    // Class binding which is only used by the test harness as there is no other\n    // way for the harness to detect if multiple panel support is enabled.\n    '[class.mat-accordion-multi]': 'this.multi',\n  }\n})\nexport class MatAccordion extends CdkAccordion implements MatAccordionBase, AfterContentInit {\n  private _keyManager: FocusKeyManager<MatExpansionPanelHeader>;\n\n  /** Headers belonging to this accordion. */\n  private _ownHeaders = new QueryList<MatExpansionPanelHeader>();\n\n  /** All headers inside the accordion. Includes headers inside nested accordions. */\n  @ContentChildren(MatExpansionPanelHeader, {descendants: true})\n  _headers: QueryList<MatExpansionPanelHeader>;\n\n  /** Whether the expansion indicator should be hidden. */\n  @Input()\n  get hideToggle(): boolean { return this._hideToggle; }\n  set hideToggle(show: boolean) { this._hideToggle = coerceBooleanProperty(show); }\n  private _hideToggle: boolean = false;\n\n  /**\n   * Display mode used for all expansion panels in the accordion. Currently two display\n   * modes exist:\n   *  default - a gutter-like spacing is placed around any expanded panel, placing the expanded\n   *     panel at a different elevation from the rest of the accordion.\n   *  flat - no spacing is placed around expanded panels, showing all panels at the same\n   *     elevation.\n   */\n  @Input() displayMode: MatAccordionDisplayMode = 'default';\n\n  /** The position of the expansion indicator. */\n  @Input() togglePosition: MatAccordionTogglePosition = 'after';\n\n  ngAfterContentInit() {\n    this._headers.changes\n      .pipe(startWith(this._headers))\n      .subscribe((headers: QueryList<MatExpansionPanelHeader>) => {\n        this._ownHeaders.reset(headers.filter(header => header.panel.accordion === this));\n        this._ownHeaders.notifyOnChanges();\n      });\n\n    this._keyManager = new FocusKeyManager(this._ownHeaders).withWrap().withHomeAndEnd();\n  }\n\n  /** Handles keyboard events coming in from the panel headers. */\n  _handleHeaderKeydown(event: KeyboardEvent) {\n    this._keyManager.onKeydown(event);\n  }\n\n  _handleHeaderFocus(header: MatExpansionPanelHeader) {\n    this._keyManager.updateActiveItem(header);\n  }\n\n  static ngAcceptInputType_hideToggle: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {CdkAccordionModule} from '@angular/cdk/accordion';\nimport {PortalModule} from '@angular/cdk/portal';\nimport {CommonModule} from '@angular/common';\nimport {NgModule} from '@angular/core';\nimport {MatAccordion} from './accordion';\nimport {MatExpansionPanel, MatExpansionPanelActionRow} from './expansion-panel';\nimport {MatExpansionPanelContent} from './expansion-panel-content';\nimport {\n  MatExpansionPanelDescription,\n  MatExpansionPanelHeader,\n  MatExpansionPanelTitle,\n} from './expansion-panel-header';\n\n\n@NgModule({\n  imports: [CommonModule, CdkAccordionModule, PortalModule],\n  exports: [\n    MatAccordion,\n    MatExpansionPanel,\n    MatExpansionPanelActionRow,\n    MatExpansionPanelHeader,\n    MatExpansionPanelTitle,\n    MatExpansionPanelDescription,\n    MatExpansionPanelContent,\n  ],\n  declarations: [\n    MatAccordion,\n    MatExpansionPanel,\n    MatExpansionPanelActionRow,\n    MatExpansionPanelHeader,\n    MatExpansionPanelTitle,\n    MatExpansionPanelDescription,\n    MatExpansionPanelContent,\n  ],\n})\nexport class MatExpansionModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './expansion-module';\nexport * from './accordion';\nexport * from './accordion-base';\nexport * from './expansion-panel';\nexport * from './expansion-panel-header';\nexport * from './expansion-panel-content';\nexport * from './expansion-animations';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","import { scheduleObservable } from './scheduleObservable';\nimport { schedulePromise } from './schedulePromise';\nimport { scheduleArray } from './scheduleArray';\nimport { scheduleIterable } from './scheduleIterable';\nimport { isInteropObservable } from '../util/isInteropObservable';\nimport { isPromise } from '../util/isPromise';\nimport { isArrayLike } from '../util/isArrayLike';\nimport { isIterable } from '../util/isIterable';\nexport function scheduled(input, scheduler) {\n    if (input != null) {\n        if (isInteropObservable(input)) {\n            return scheduleObservable(input, scheduler);\n        }\n        else if (isPromise(input)) {\n            return schedulePromise(input, scheduler);\n        }\n        else if (isArrayLike(input)) {\n            return scheduleArray(input, scheduler);\n        }\n        else if (isIterable(input) || typeof input === 'string') {\n            return scheduleIterable(input, scheduler);\n        }\n    }\n    throw new TypeError((input !== null && typeof input || input) + ' is not observable');\n}\n//# sourceMappingURL=scheduled.js.map","import { AsapAction } from './AsapAction';\nimport { AsapScheduler } from './AsapScheduler';\nexport const asapScheduler = new AsapScheduler(AsapAction);\nexport const asap = asapScheduler;\n//# sourceMappingURL=asap.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar find_1 = require(\"../../operator/find\");\nrxjs_1.Observable.prototype.find = find_1.find;\n//# sourceMappingURL=find.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar windowCount_1 = require(\"../../operator/windowCount\");\nrxjs_1.Observable.prototype.windowCount = windowCount_1.windowCount;\n//# sourceMappingURL=windowCount.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar multicast_1 = require(\"../../operator/multicast\");\nrxjs_1.Observable.prototype.multicast = multicast_1.multicast;\n//# sourceMappingURL=multicast.js.map","var setPrototypeOf = require(\"./setPrototypeOf\");\n\nfunction _inherits(subClass, superClass) {\n  if (typeof superClass !== \"function\" && superClass !== null) {\n    throw new TypeError(\"Super expression must either be null or a function\");\n  }\n\n  subClass.prototype = Object.create(superClass && superClass.prototype, {\n    constructor: {\n      value: subClass,\n      writable: true,\n      configurable: true\n    }\n  });\n  if (superClass) setPrototypeOf(subClass, superClass);\n}\n\nmodule.exports = _inherits;","import { isFunction } from './util/isFunction';\nimport { empty as emptyObserver } from './Observer';\nimport { Subscription } from './Subscription';\nimport { rxSubscriber as rxSubscriberSymbol } from '../internal/symbol/rxSubscriber';\nimport { config } from './config';\nimport { hostReportError } from './util/hostReportError';\nexport class Subscriber extends Subscription {\n    constructor(destinationOrNext, error, complete) {\n        super();\n        this.syncErrorValue = null;\n        this.syncErrorThrown = false;\n        this.syncErrorThrowable = false;\n        this.isStopped = false;\n        switch (arguments.length) {\n            case 0:\n                this.destination = emptyObserver;\n                break;\n            case 1:\n                if (!destinationOrNext) {\n                    this.destination = emptyObserver;\n                    break;\n                }\n                if (typeof destinationOrNext === 'object') {\n                    if (destinationOrNext instanceof Subscriber) {\n                        this.syncErrorThrowable = destinationOrNext.syncErrorThrowable;\n                        this.destination = destinationOrNext;\n                        destinationOrNext.add(this);\n                    }\n                    else {\n                        this.syncErrorThrowable = true;\n                        this.destination = new SafeSubscriber(this, destinationOrNext);\n                    }\n                    break;\n                }\n            default:\n                this.syncErrorThrowable = true;\n                this.destination = new SafeSubscriber(this, destinationOrNext, error, complete);\n                break;\n        }\n    }\n    [rxSubscriberSymbol]() { return this; }\n    static create(next, error, complete) {\n        const subscriber = new Subscriber(next, error, complete);\n        subscriber.syncErrorThrowable = false;\n        return subscriber;\n    }\n    next(value) {\n        if (!this.isStopped) {\n            this._next(value);\n        }\n    }\n    error(err) {\n        if (!this.isStopped) {\n            this.isStopped = true;\n            this._error(err);\n        }\n    }\n    complete() {\n        if (!this.isStopped) {\n            this.isStopped = true;\n            this._complete();\n        }\n    }\n    unsubscribe() {\n        if (this.closed) {\n            return;\n        }\n        this.isStopped = true;\n        super.unsubscribe();\n    }\n    _next(value) {\n        this.destination.next(value);\n    }\n    _error(err) {\n        this.destination.error(err);\n        this.unsubscribe();\n    }\n    _complete() {\n        this.destination.complete();\n        this.unsubscribe();\n    }\n    _unsubscribeAndRecycle() {\n        const { _parentOrParents } = this;\n        this._parentOrParents = null;\n        this.unsubscribe();\n        this.closed = false;\n        this.isStopped = false;\n        this._parentOrParents = _parentOrParents;\n        return this;\n    }\n}\nexport class SafeSubscriber extends Subscriber {\n    constructor(_parentSubscriber, observerOrNext, error, complete) {\n        super();\n        this._parentSubscriber = _parentSubscriber;\n        let next;\n        let context = this;\n        if (isFunction(observerOrNext)) {\n            next = observerOrNext;\n        }\n        else if (observerOrNext) {\n            next = observerOrNext.next;\n            error = observerOrNext.error;\n            complete = observerOrNext.complete;\n            if (observerOrNext !== emptyObserver) {\n                context = Object.create(observerOrNext);\n                if (isFunction(context.unsubscribe)) {\n                    this.add(context.unsubscribe.bind(context));\n                }\n                context.unsubscribe = this.unsubscribe.bind(this);\n            }\n        }\n        this._context = context;\n        this._next = next;\n        this._error = error;\n        this._complete = complete;\n    }\n    next(value) {\n        if (!this.isStopped && this._next) {\n            const { _parentSubscriber } = this;\n            if (!config.useDeprecatedSynchronousErrorHandling || !_parentSubscriber.syncErrorThrowable) {\n                this.__tryOrUnsub(this._next, value);\n            }\n            else if (this.__tryOrSetError(_parentSubscriber, this._next, value)) {\n                this.unsubscribe();\n            }\n        }\n    }\n    error(err) {\n        if (!this.isStopped) {\n            const { _parentSubscriber } = this;\n            const { useDeprecatedSynchronousErrorHandling } = config;\n            if (this._error) {\n                if (!useDeprecatedSynchronousErrorHandling || !_parentSubscriber.syncErrorThrowable) {\n                    this.__tryOrUnsub(this._error, err);\n                    this.unsubscribe();\n                }\n                else {\n                    this.__tryOrSetError(_parentSubscriber, this._error, err);\n                    this.unsubscribe();\n                }\n            }\n            else if (!_parentSubscriber.syncErrorThrowable) {\n                this.unsubscribe();\n                if (useDeprecatedSynchronousErrorHandling) {\n                    throw err;\n                }\n                hostReportError(err);\n            }\n            else {\n                if (useDeprecatedSynchronousErrorHandling) {\n                    _parentSubscriber.syncErrorValue = err;\n                    _parentSubscriber.syncErrorThrown = true;\n                }\n                else {\n                    hostReportError(err);\n                }\n                this.unsubscribe();\n            }\n        }\n    }\n    complete() {\n        if (!this.isStopped) {\n            const { _parentSubscriber } = this;\n            if (this._complete) {\n                const wrappedComplete = () => this._complete.call(this._context);\n                if (!config.useDeprecatedSynchronousErrorHandling || !_parentSubscriber.syncErrorThrowable) {\n                    this.__tryOrUnsub(wrappedComplete);\n                    this.unsubscribe();\n                }\n                else {\n                    this.__tryOrSetError(_parentSubscriber, wrappedComplete);\n                    this.unsubscribe();\n                }\n            }\n            else {\n                this.unsubscribe();\n            }\n        }\n    }\n    __tryOrUnsub(fn, value) {\n        try {\n            fn.call(this._context, value);\n        }\n        catch (err) {\n            this.unsubscribe();\n            if (config.useDeprecatedSynchronousErrorHandling) {\n                throw err;\n            }\n            else {\n                hostReportError(err);\n            }\n        }\n    }\n    __tryOrSetError(parent, fn, value) {\n        if (!config.useDeprecatedSynchronousErrorHandling) {\n            throw new Error('bad call');\n        }\n        try {\n            fn.call(this._context, value);\n        }\n        catch (err) {\n            if (config.useDeprecatedSynchronousErrorHandling) {\n                parent.syncErrorValue = err;\n                parent.syncErrorThrown = true;\n                return true;\n            }\n            else {\n                hostReportError(err);\n                return true;\n            }\n        }\n        return false;\n    }\n    _unsubscribe() {\n        const { _parentSubscriber } = this;\n        this._context = null;\n        this._parentSubscriber = null;\n        _parentSubscriber.unsubscribe();\n    }\n}\n//# sourceMappingURL=Subscriber.js.map","import { Subscription } from '../Subscription';\nexport class Action extends Subscription {\n    constructor(scheduler, work) {\n        super();\n    }\n    schedule(state, delay = 0) {\n        return this;\n    }\n}\n//# sourceMappingURL=Action.js.map","import { CombineLatestOperator } from '../observable/combineLatest';\nexport function combineAll(project) {\n    return (source) => source.lift(new CombineLatestOperator(project));\n}\n//# sourceMappingURL=combineAll.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/* tslint:enable:max-line-length */\n/**\n * Returns an Observable that emits all items emitted by the source Observable that are distinct by comparison from the previous item,\n * using a property accessed by using the key provided to check if the two items are distinct.\n *\n * If a comparator function is provided, then it will be called for each item to test for whether or not that value should be emitted.\n *\n * If a comparator function is not provided, an equality check is used by default.\n *\n * @example <caption>An example comparing the name of persons</caption>\n *\n *  interface Person {\n *     age: number,\n *     name: string\n *  }\n *\n * Observable.of<Person>(\n *     { age: 4, name: 'Foo'},\n *     { age: 7, name: 'Bar'},\n *     { age: 5, name: 'Foo'},\n *     { age: 6, name: 'Foo'})\n *     .distinctUntilKeyChanged('name')\n *     .subscribe(x => console.log(x));\n *\n * // displays:\n * // { age: 4, name: 'Foo' }\n * // { age: 7, name: 'Bar' }\n * // { age: 5, name: 'Foo' }\n *\n * @example <caption>An example comparing the first letters of the name</caption>\n *\n * interface Person {\n *     age: number,\n *     name: string\n *  }\n *\n * Observable.of<Person>(\n *     { age: 4, name: 'Foo1'},\n *     { age: 7, name: 'Bar'},\n *     { age: 5, name: 'Foo2'},\n *     { age: 6, name: 'Foo3'})\n *     .distinctUntilKeyChanged('name', (x: string, y: string) => x.substring(0, 3) === y.substring(0, 3))\n *     .subscribe(x => console.log(x));\n *\n * // displays:\n * // { age: 4, name: 'Foo1' }\n * // { age: 7, name: 'Bar' }\n * // { age: 5, name: 'Foo2' }\n *\n * @see {@link distinct}\n * @see {@link distinctUntilChanged}\n *\n * @param {string} key String key for object property lookup on each item.\n * @param {function} [compare] Optional comparison function called to test if an item is distinct from the previous item in the source.\n * @return {Observable} An Observable that emits items from the source Observable with distinct values based on the key specified.\n * @method distinctUntilKeyChanged\n * @owner Observable\n */\n// tslint:disable-next-line:max-line-length\nfunction distinctUntilKeyChanged(key, compare) {\n    return operators_1.distinctUntilKeyChanged(key, compare)(this);\n}\nexports.distinctUntilKeyChanged = distinctUntilKeyChanged;\n//# sourceMappingURL=distinctUntilKeyChanged.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar map_1 = require(\"../../operator/map\");\nrxjs_1.Observable.prototype.map = map_1.map;\n//# sourceMappingURL=map.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nfunction staticNever() {\n    return rxjs_1.NEVER;\n}\nexports.staticNever = staticNever;\nrxjs_1.Observable.never = staticNever;\n//# sourceMappingURL=never.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Asynchronously subscribes Observers to this Observable on the specified IScheduler.\n *\n * <img src=\"./img/subscribeOn.png\" width=\"100%\">\n *\n * @param {Scheduler} scheduler - The IScheduler to perform subscription actions on.\n * @return {Observable<T>} The source Observable modified so that its subscriptions happen on the specified IScheduler.\n .\n * @method subscribeOn\n * @owner Observable\n */\nfunction subscribeOn(scheduler, delay) {\n    if (delay === void 0) { delay = 0; }\n    return operators_1.subscribeOn(scheduler, delay)(this);\n}\nexports.subscribeOn = subscribeOn;\n//# sourceMappingURL=subscribeOn.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * Type describing the allowed values for a boolean input.\n * @docs-private\n */\nexport type BooleanInput = string | boolean | null | undefined;\n\n/** Coerces a data-bound value (typically a string) to a boolean. */\nexport function coerceBooleanProperty(value: any): boolean {\n  return value != null && `${value}` !== 'false';\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * Type describing the allowed values for a number input\n * @docs-private\n */\nexport type NumberInput = string | number | null | undefined;\n\n/** Coerces a data-bound value (typically a string) to a number. */\nexport function coerceNumberProperty(value: any): number;\nexport function coerceNumberProperty<D>(value: any, fallback: D): number | D;\nexport function coerceNumberProperty(value: any, fallbackValue = 0) {\n  return _isNumberValue(value) ? Number(value) : fallbackValue;\n}\n\n/**\n * Whether the provided value is considered a number.\n * @docs-private\n */\nexport function _isNumberValue(value: any): boolean {\n  // parseFloat(value) handles most of the cases we're interested in (it treats null, empty string,\n  // and other non-number values as NaN, where Number just uses 0) but it considers the string\n  // '123hello' to be a valid number. Therefore we also check if Number(value) is NaN.\n  return !isNaN(parseFloat(value as any)) && !isNaN(Number(value));\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/** Wraps the provided value in an array, unless the provided value is an array. */\nexport function coerceArray<T>(value: T | T[]): T[];\nexport function coerceArray<T>(value: T | readonly T[]): readonly T[];\nexport function coerceArray<T>(value: T | T[]): T[] {\n  return Array.isArray(value) ? value : [value];\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/** Coerces a value to a CSS pixel value. */\nexport function coerceCssPixelValue(value: any): string {\n  if (value == null) {\n    return '';\n  }\n\n  return typeof value === 'string' ? value : `${value}px`;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ElementRef} from '@angular/core';\n\n/**\n * Coerces an ElementRef or an Element into an element.\n * Useful for APIs that can accept either a ref or the native element itself.\n */\nexport function coerceElement<T>(elementOrRef: ElementRef<T> | T): T {\n  return elementOrRef instanceof ElementRef ? elementOrRef.nativeElement : elementOrRef;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './boolean-property';\nexport * from './number-property';\nexport * from './array';\nexport * from './css-pixel-value';\nexport * from './element';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './public-api';\n","import { Subscriber } from '../Subscriber';\nexport function canReportError(observer) {\n    while (observer) {\n        const { closed, destination, isStopped } = observer;\n        if (closed || isStopped) {\n            return false;\n        }\n        else if (destination && destination instanceof Subscriber) {\n            observer = destination;\n        }\n        else {\n            observer = null;\n        }\n    }\n    return true;\n}\n//# sourceMappingURL=canReportError.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar mapTo_1 = require(\"../../operator/mapTo\");\nrxjs_1.Observable.prototype.mapTo = mapTo_1.mapTo;\n//# sourceMappingURL=mapTo.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar throttleTime_1 = require(\"../../operator/throttleTime\");\nrxjs_1.Observable.prototype.throttleTime = throttleTime_1.throttleTime;\n//# sourceMappingURL=throttleTime.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Emits only the last `count` values emitted by the source Observable.\n *\n * <span class=\"informal\">Remembers the latest `count` values, then emits those\n * only when the source completes.</span>\n *\n * <img src=\"./img/takeLast.png\" width=\"100%\">\n *\n * `takeLast` returns an Observable that emits at most the last `count` values\n * emitted by the source Observable. If the source emits fewer than `count`\n * values then all of its values are emitted. This operator must wait until the\n * `complete` notification emission from the source in order to emit the `next`\n * values on the output Observable, because otherwise it is impossible to know\n * whether or not more values will be emitted on the source. For this reason,\n * all values are emitted synchronously, followed by the complete notification.\n *\n * @example <caption>Take the last 3 values of an Observable with many values</caption>\n * var many = Rx.Observable.range(1, 100);\n * var lastThree = many.takeLast(3);\n * lastThree.subscribe(x => console.log(x));\n *\n * @see {@link take}\n * @see {@link takeUntil}\n * @see {@link takeWhile}\n * @see {@link skip}\n *\n * @throws {ArgumentOutOfRangeError} When using `takeLast(i)`, it delivers an\n * ArgumentOutOrRangeError to the Observer's `error` callback if `i < 0`.\n *\n * @param {number} count The maximum number of values to emit from the end of\n * the sequence of values emitted by the source Observable.\n * @return {Observable<T>} An Observable that emits at most the last count\n * values emitted by the source Observable.\n * @method takeLast\n * @owner Observable\n */\nfunction takeLast(count) {\n    return operators_1.takeLast(count)(this);\n}\nexports.takeLast = takeLast;\n//# sourceMappingURL=takeLast.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar count_1 = require(\"../../operator/count\");\nrxjs_1.Observable.prototype.count = count_1.count;\n//# sourceMappingURL=count.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar last_1 = require(\"../../operator/last\");\nrxjs_1.Observable.prototype.last = last_1.last;\n//# sourceMappingURL=last.js.map","import { Subscriber } from '../Subscriber';\nexport function bufferCount(bufferSize, startBufferEvery = null) {\n    return function bufferCountOperatorFunction(source) {\n        return source.lift(new BufferCountOperator(bufferSize, startBufferEvery));\n    };\n}\nclass BufferCountOperator {\n    constructor(bufferSize, startBufferEvery) {\n        this.bufferSize = bufferSize;\n        this.startBufferEvery = startBufferEvery;\n        if (!startBufferEvery || bufferSize === startBufferEvery) {\n            this.subscriberClass = BufferCountSubscriber;\n        }\n        else {\n            this.subscriberClass = BufferSkipCountSubscriber;\n        }\n    }\n    call(subscriber, source) {\n        return source.subscribe(new this.subscriberClass(subscriber, this.bufferSize, this.startBufferEvery));\n    }\n}\nclass BufferCountSubscriber extends Subscriber {\n    constructor(destination, bufferSize) {\n        super(destination);\n        this.bufferSize = bufferSize;\n        this.buffer = [];\n    }\n    _next(value) {\n        const buffer = this.buffer;\n        buffer.push(value);\n        if (buffer.length == this.bufferSize) {\n            this.destination.next(buffer);\n            this.buffer = [];\n        }\n    }\n    _complete() {\n        const buffer = this.buffer;\n        if (buffer.length > 0) {\n            this.destination.next(buffer);\n        }\n        super._complete();\n    }\n}\nclass BufferSkipCountSubscriber extends Subscriber {\n    constructor(destination, bufferSize, startBufferEvery) {\n        super(destination);\n        this.bufferSize = bufferSize;\n        this.startBufferEvery = startBufferEvery;\n        this.buffers = [];\n        this.count = 0;\n    }\n    _next(value) {\n        const { bufferSize, startBufferEvery, buffers, count } = this;\n        this.count++;\n        if (count % startBufferEvery === 0) {\n            buffers.push([]);\n        }\n        for (let i = buffers.length; i--;) {\n            const buffer = buffers[i];\n            buffer.push(value);\n            if (buffer.length === bufferSize) {\n                buffers.splice(i, 1);\n                this.destination.next(buffer);\n            }\n        }\n    }\n    _complete() {\n        const { buffers, destination } = this;\n        while (buffers.length > 0) {\n            let buffer = buffers.shift();\n            if (buffer.length > 0) {\n                destination.next(buffer);\n            }\n        }\n        super._complete();\n    }\n}\n//# sourceMappingURL=bufferCount.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar zip_1 = require(\"../../operator/zip\");\nrxjs_1.Observable.prototype.zip = zip_1.zipProto;\n//# sourceMappingURL=zip.js.map","/**\n * Created by ahsanayaz on 08/11/2016.\n */\n\nexport const BROWSERS = {\n  CHROME: 'Chrome',\n  FIREFOX: 'Firefox',\n  SAFARI: 'Safari',\n  OPERA: 'Opera',\n  IE: 'IE',\n  MS_EDGE: 'MS-Edge',\n  MS_EDGE_CHROMIUM: 'MS-Edge-Chromium',\n  FB_MESSANGER: 'FB-Messanger',\n  SAMSUNG: 'Samsung',\n  UCBROWSER: 'UC-Browser',\n  UNKNOWN: 'Unknown',\n};\n\nexport const MOBILES_RE = {\n  // tslint:disable-next-line:max-line-length\n  HTC: /HTC|HTC.*(Sensation|Evo|Vision|Explorer|6800|8100|8900|A7272|S510e|C110e|Legend|Desire|T8282)|APX515CKT|Qtek9090|APA9292KT|HD_mini|Sensation.*Z710e|PG86100|Z715e|Desire.*(A8181|HD)|ADR6200|ADR6400L|ADR6425|001HT|Inspire 4G|Android.*\\bEVO\\b|T-Mobile G1|Z520m|Android [0-9.]+; Pixel/,\n  NEXUS_PHONE: /Nexus One|Nexus S|Galaxy.*Nexus|Android.*Nexus.*Mobile|Nexus 4|Nexus 5|Nexus 6/,\n  DELL: /Dell[;]? (Streak|Aero|Venue|Venue Pro|Flash|Smoke|Mini 3iX)|XCD28|XCD35|\\b001DL\\b|\\b101DL\\b|\\bGS01\\b/,\n  MOTOROLA: new RegExp(`Motorola|DROIDX|DROID BIONIC|\\\\bDroid\\\\b.*Build|Android.*Xoom|HRI39|MOT-|A1260|A1680|A555|A853|\n      A855|A953|A955|A956|Motorola.*ELECTRIFY|Motorola.*i1|i867|i940|MB200|MB300|MB501|MB502|MB508|MB511|\n      MB520|MB525|MB526|MB611|MB612|MB632|MB810|MB855|MB860|MB861|MB865|MB870|ME501|ME502|ME511|ME525|ME600|\n      ME632|ME722|ME811|ME860|ME863|ME865|MT620|MT710|MT716|MT720|MT810|MT870|MT917|Motorola.*TITANIUM|WX435|\n      WX445|XT300|XT301|XT311|XT316|XT317|XT319|XT320|XT390|XT502|XT530|XT531|XT532|XT535|XT603|XT610|XT611|\n      XT615|XT681|XT701|XT702|XT711|XT720|XT800|XT806|XT860|XT862|XT875|XT882|XT883|XT894|XT901|XT907|XT909|\n      XT910|XT912|XT928|XT926|XT915|XT919|XT925|XT1021|\\\\bMoto E\\\\b|XT1068|XT1092|XT1052`),\n  SAMSUNG: new RegExp(`\\\\bSamsung\\\\b|SM-G950F|SM-G955F|SM-G9250|GT-19300|SGH-I337|BGT-S5230|GT-B2100|GT-B2700|GT-B2710|\n      GT-B3210|GT-B3310|GT-B3410|GT-B3730|GT-B3740|GT-B5510|GT-B5512|GT-B5722|GT-B6520|GT-B7300|GT-B7320|\n      GT-B7330|GT-B7350|GT-B7510|GT-B7722|GT-B7800|GT-C3010|GT-C3011|GT-C3060|GT-C3200|GT-C3212|GT-C3212I|\n      GT-C3262|GT-C3222|GT-C3300|GT-C3300K|GT-C3303|GT-C3303K|GT-C3310|GT-C3322|GT-C3330|GT-C3350|GT-C3500|\n      GT-C3510|GT-C3530|GT-C3630|GT-C3780|GT-C5010|GT-C5212|GT-C6620|GT-C6625|GT-C6712|GT-E1050|GT-E1070|\n      GT-E1075|GT-E1080|GT-E1081|GT-E1085|GT-E1087|GT-E1100|GT-E1107|GT-E1110|GT-E1120|GT-E1125|GT-E1130|\n      GT-E1160|GT-E1170|GT-E1175|GT-E1180|GT-E1182|GT-E1200|GT-E1210|GT-E1225|GT-E1230|GT-E1390|GT-E2100|\n      GT-E2120|GT-E2121|GT-E2152|GT-E2220|GT-E2222|GT-E2230|GT-E2232|GT-E2250|GT-E2370|GT-E2550|GT-E2652|\n      GT-E3210|GT-E3213|GT-I5500|GT-I5503|GT-I5700|GT-I5800|GT-I5801|GT-I6410|GT-I6420|GT-I7110|GT-I7410|\n      GT-I7500|GT-I8000|GT-I8150|GT-I8160|GT-I8190|GT-I8320|GT-I8330|GT-I8350|GT-I8530|GT-I8700|GT-I8703|\n      GT-I8910|GT-I9000|GT-I9001|GT-I9003|GT-I9010|GT-I9020|GT-I9023|GT-I9070|GT-I9082|GT-I9100|GT-I9103|\n      GT-I9220|GT-I9250|GT-I9300|GT-I9305|GT-I9500|GT-I9505|GT-M3510|GT-M5650|GT-M7500|GT-M7600|GT-M7603|\n      GT-M8800|GT-M8910|GT-N7000|GT-S3110|GT-S3310|GT-S3350|GT-S3353|GT-S3370|GT-S3650|GT-S3653|GT-S3770|\n      GT-S3850|GT-S5210|GT-S5220|GT-S5229|GT-S5230|GT-S5233|GT-S5250|GT-S5253|GT-S5260|GT-S5263|GT-S5270|\n      GT-S5300|GT-S5330|GT-S5350|GT-S5360|GT-S5363|GT-S5369|GT-S5380|GT-S5380D|GT-S5560|GT-S5570|GT-S5600|\n      GT-S5603|GT-S5610|GT-S5620|GT-S5660|GT-S5670|GT-S5690|GT-S5750|GT-S5780|GT-S5830|GT-S5839|GT-S6102|\n      GT-S6500|GT-S7070|GT-S7200|GT-S7220|GT-S7230|GT-S7233|GT-S7250|GT-S7500|GT-S7530|GT-S7550|GT-S7562|\n      GT-S7710|GT-S8000|GT-S8003|GT-S8500|GT-S8530|GT-S8600|SCH-A310|SCH-A530|SCH-A570|SCH-A610|SCH-A630|\n      SCH-A650|SCH-A790|SCH-A795|SCH-A850|SCH-A870|SCH-A890|SCH-A930|SCH-A950|SCH-A970|SCH-A990|SCH-I100|\n      SCH-I110|SCH-I400|SCH-I405|SCH-I500|SCH-I510|SCH-I515|SCH-I600|SCH-I730|SCH-I760|SCH-I770|SCH-I830|\n      SCH-I910|SCH-I920|SCH-I959|SCH-LC11|SCH-N150|SCH-N300|SCH-R100|SCH-R300|SCH-R351|SCH-R400|SCH-R410|\n      SCH-T300|SCH-U310|SCH-U320|SCH-U350|SCH-U360|SCH-U365|SCH-U370|SCH-U380|SCH-U410|SCH-U430|SCH-U450|\n      SCH-U460|SCH-U470|SCH-U490|SCH-U540|SCH-U550|SCH-U620|SCH-U640|SCH-U650|SCH-U660|SCH-U700|SCH-U740|\n      SCH-U750|SCH-U810|SCH-U820|SCH-U900|SCH-U940|SCH-U960|SCS-26UC|SGH-A107|SGH-A117|SGH-A127|SGH-A137|\n      SGH-A157|SGH-A167|SGH-A177|SGH-A187|SGH-A197|SGH-A227|SGH-A237|SGH-A257|SGH-A437|SGH-A517|SGH-A597|\n      SGH-A637|SGH-A657|SGH-A667|SGH-A687|SGH-A697|SGH-A707|SGH-A717|SGH-A727|SGH-A737|SGH-A747|SGH-A767|\n      SGH-A777|SGH-A797|SGH-A817|SGH-A827|SGH-A837|SGH-A847|SGH-A867|SGH-A877|SGH-A887|SGH-A897|SGH-A927|\n      SGH-B100|SGH-B130|SGH-B200|SGH-B220|SGH-C100|SGH-C110|SGH-C120|SGH-C130|SGH-C140|SGH-C160|SGH-C170|\n      SGH-C180|SGH-C200|SGH-C207|SGH-C210|SGH-C225|SGH-C230|SGH-C417|SGH-C450|SGH-D307|SGH-D347|SGH-D357|\n      SGH-D407|SGH-D415|SGH-D780|SGH-D807|SGH-D980|SGH-E105|SGH-E200|SGH-E315|SGH-E316|SGH-E317|SGH-E335|\n      SGH-E590|SGH-E635|SGH-E715|SGH-E890|SGH-F300|SGH-F480|SGH-I200|SGH-I300|SGH-I320|SGH-I550|SGH-I577|\n      SGH-I600|SGH-I607|SGH-I617|SGH-I627|SGH-I637|SGH-I677|SGH-I700|SGH-I717|SGH-I727|SGH-i747M|SGH-I777|\n      SGH-I780|SGH-I827|SGH-I847|SGH-I857|SGH-I896|SGH-I897|SGH-I900|SGH-I907|SGH-I917|SGH-I927|SGH-I937|\n      SGH-I997|SGH-J150|SGH-J200|SGH-L170|SGH-L700|SGH-M110|SGH-M150|SGH-M200|SGH-N105|SGH-N500|SGH-N600|\n      SGH-N620|SGH-N625|SGH-N700|SGH-N710|SGH-P107|SGH-P207|SGH-P300|SGH-P310|SGH-P520|SGH-P735|SGH-P777|\n      SGH-Q105|SGH-R210|SGH-R220|SGH-R225|SGH-S105|SGH-S307|SGH-T109|SGH-T119|SGH-T139|SGH-T209|SGH-T219|\n      SGH-T229|SGH-T239|SGH-T249|SGH-T259|SGH-T309|SGH-T319|SGH-T329|SGH-T339|SGH-T349|SGH-T359|SGH-T369|\n      SGH-T379|SGH-T409|SGH-T429|SGH-T439|SGH-T459|SGH-T469|SGH-T479|SGH-T499|SGH-T509|SGH-T519|SGH-T539|\n      SGH-T559|SGH-T589|SGH-T609|SGH-T619|SGH-T629|SGH-T639|SGH-T659|SGH-T669|SGH-T679|SGH-T709|SGH-T719|\n      SGH-T729|SGH-T739|SGH-T746|SGH-T749|SGH-T759|SGH-T769|SGH-T809|SGH-T819|SGH-T839|SGH-T919|SGH-T929|\n      SGH-T939|SGH-T959|SGH-T989|SGH-U100|SGH-U200|SGH-U800|SGH-V205|SGH-V206|SGH-X100|SGH-X105|SGH-X120|\n      SGH-X140|SGH-X426|SGH-X427|SGH-X475|SGH-X495|SGH-X497|SGH-X507|SGH-X600|SGH-X610|SGH-X620|SGH-X630|\n      SGH-X700|SGH-X820|SGH-X890|SGH-Z130|SGH-Z150|SGH-Z170|SGH-ZX10|SGH-ZX20|SHW-M110|SPH-A120|SPH-A400|\n      SPH-A420|SPH-A460|SPH-A500|SPH-A560|SPH-A600|SPH-A620|SPH-A660|SPH-A700|SPH-A740|SPH-A760|SPH-A790|\n      SPH-A800|SPH-A820|SPH-A840|SPH-A880|SPH-A900|SPH-A940|SPH-A960|SPH-D600|SPH-D700|SPH-D710|SPH-D720|\n      SPH-I300|SPH-I325|SPH-I330|SPH-I350|SPH-I500|SPH-I600|SPH-I700|SPH-L700|SPH-M100|SPH-M220|SPH-M240|\n      SPH-M300|SPH-M305|SPH-M320|SPH-M330|SPH-M350|SPH-M360|SPH-M370|SPH-M380|SPH-M510|SPH-M540|SPH-M550|\n      SPH-M560|SPH-M570|SPH-M580|SPH-M610|SPH-M620|SPH-M630|SPH-M800|SPH-M810|SPH-M850|SPH-M900|SPH-M910|\n      SPH-M920|SPH-M930|SPH-N100|SPH-N200|SPH-N240|SPH-N300|SPH-N400|SPH-Z400|SWC-E100|SCH-i909|GT-N7100|\n      GT-N7105|SCH-I535|SM-N900A|SM-N900T|SGH-I317|SGH-T999L|GT-S5360B|GT-I8262|GT-S6802|GT-S6312|GT-S6310|GT-S5312|\n      GT-S5310|GT-I9105|GT-I8510|GT-S6790N|SM-G7105|SM-N9005|GT-S5301|GT-I9295|GT-I9195|SM-C101|GT-S7392|GT-S7560|\n      GT-B7610|GT-I5510|GT-S7582|GT-S7530E|GT-I8750|SM-G9006V|SM-G9008V|SM-G9009D|SM-G900A|SM-G900D|SM-G900F|\n      SM-G900H|SM-G900I|SM-G900J|SM-G900K|SM-G900L|SM-G900M|SM-G900P|SM-G900R4|SM-G900S|SM-G900T|SM-G900V|\n      SM-G900W8|SHV-E160K|SCH-P709|SCH-P729|SM-T2558|GT-I9205|SM-G9350|SM-J120F|SM-G920F|SM-G920V|SM-G930F|\n      SM-N910C|SM-A310F|GT-I9190|SM-J500FN|SM-G903F|SM-J330F`),\n  LG: new RegExp(`\\\\bLG\\\\b;|LG[- ]?(C800|C900|E400|E610|E900|E-900|F160|F180K|F180L|F180S|730|855|L160|LS740|LS840|LS970|\n      LU6200|MS690|MS695|MS770|MS840|MS870|MS910|P500|P700|P705|VM696|AS680|AS695|AX840|C729|E970|GS505|272|\n      C395|E739BK|E960|L55C|L75C|LS696|LS860|P769BK|P350|P500|P509|P870|UN272|US730|VS840|VS950|LN272|LN510|\n      LS670|LS855|LW690|MN270|MN510|P509|P769|P930|UN200|UN270|UN510|UN610|US670|US740|US760|UX265|UX840|VN271|\n      VN530|VS660|VS700|VS740|VS750|VS910|VS920|VS930|VX9200|VX11000|AX840A|LW770|P506|P925|P999|E612|D955|D802|\n      MS323|M257)`),\n  SONY: /SonyST|SonyLT|SonyEricsson|SonyEricssonLT15iv|LT18i|E10i|LT28h|LT26w|SonyEricssonMT27i|C5303|C6902|C6903|C6906|C6943|D2533/,\n  ASUS: /Asus.*Galaxy|PadFone.*Mobile/,\n  NOKIA_LUMIA: /Lumia [0-9]{3,4}/,\n  MICROMAX: /Micromax.*\\b(A210|A92|A88|A72|A111|A110Q|A115|A116|A110|A90S|A26|A51|A35|A54|A25|A27|A89|A68|A65|A57|A90)\\b/,\n  PALM: /PalmSource|Palm/,\n  VERTU: /Vertu|Vertu.*Ltd|Vertu.*Ascent|Vertu.*Ayxta|Vertu.*Constellation(F|Quest)?|Vertu.*Monika|Vertu.*Signature/,\n  PANTECH: new RegExp(`PANTECH|IM-A850S|IM-A840S|IM-A830L|IM-A830K|IM-A830S|IM-A820L|IM-A810K|IM-A810S|IM-A800S|IM-T100K|\n        IM-A725L|IM-A780L|IM-A775C|IM-A770K|IM-A760S|IM-A750K|IM-A740S|IM-A730S|IM-A720L|IM-A710K|IM-A690L|\n        IM-A690S|IM-A650S|IM-A630K|IM-A600S|VEGA PTL21|PT003|P8010|ADR910L|P6030|P6020|P9070|P4100|P9060|P5000|\n        CDM8992|TXT8045|ADR8995|IS11PT|P2030|P6010|P8000|PT002|IS06|CDM8999|P9050|PT001|TXT8040|P2020|P9020|\n        P2000|P7040|P7000|C790`),\n  FLY: /IQ230|IQ444|IQ450|IQ440|IQ442|IQ441|IQ245|IQ256|IQ236|IQ255|IQ235|IQ245|IQ275|IQ240|IQ285|IQ280|IQ270|IQ260|IQ250/,\n  WIKO: new RegExp(`KITE 4G|HIGHWAY|GETAWAY|STAIRWAY|DARKSIDE|DARKFULL|DARKNIGHT|DARKMOON|SLIDE|WAX 4G|RAINBOW|BLOOM|\n        SUNSET|GOA(?!nna)|LENNY|BARRY|IGGY|OZZY|CINK FIVE|CINK PEAX|CINK PEAX 2|CINK SLIM|CINK SLIM 2|CINK +|\n        CINK KING|CINK PEAX|CINK SLIM|SUBLIM`),\n  I_MOBILE: /i-mobile (IQ|i-STYLE|idea|ZAA|Hitz)/,\n  SIMVALLEY: /\\b(SP-80|XT-930|SX-340|XT-930|SX-310|SP-360|SP60|SPT-800|SP-120|SPT-800|SP-140|SPX-5|SPX-8|SP-100|SPX-8|SPX-12)\\b/,\n  WOLFGANG: /AT-B24D|AT-AS50HD|AT-AS40W|AT-AS55HD|AT-AS45q2|AT-B26D|AT-AS50Q/,\n  ALCATEL: /Alcatel/,\n  NINTENDO: /Nintendo (3DS|Switch)/,\n  AMOI: /Amoi/,\n  INQ: /INQ/,\n  VITA: /\\bVita\\b/,\n  BLACKBERRY: /\\bBlackBerry\\b|\\bBB10\\b|rim[0-9]+/,\n  FIREFOX_OS: /\\bFirefox-OS\\b/,\n  IPHONE: /\\biPhone\\b/,\n  iPod: /\\biPod\\b/,\n  ANDROID: /\\bAndroid\\b/,\n  WINDOWS_PHONE: /\\bWindows-Phone\\b/,\n  GENERIC_PHONE: new RegExp(`Tapatalk|PDA;|SAGEM|\\\\bmmp\\\\b|pocket|\\\\bpsp\\\\b|symbian|Smartphone|smartfon|treo|up.browser|\n        up.link|vodafone|\\\\bwap\\\\b|nokia|Nokia|Series40|Series60|S60|SonyEricsson|N900|MAUI.*WAP.*Browser`),\n};\n\nexport const TABLETS_RE = {\n  iPad: /iPad|iPad.*Mobile/,\n  NexusTablet: /Android.*Nexus[\\s]+(7|9|10)/,\n  GoogleTablet: /Android.*Pixel C/,\n  SamsungTablet: new RegExp(`SAMSUNG.*Tablet|Galaxy.*Tab|SC-01C|GT-P1000|GT-P1003|GT-P1010|GT-P3105|GT-P6210|\n        GT-P6800|GT-P6810|GT-P7100|GT-P7300|GT-P7310|GT-P7500|GT-P7510|SCH-I800|SCH-I815|SCH-I905|\n        SGH-I957|SGH-I987|SGH-T849|SGH-T859|SGH-T869|SPH-P100|GT-P3100|GT-P3108|GT-P3110|GT-P5100|\n        GT-P5110|GT-P6200|GT-P7320|GT-P7511|GT-N8000|GT-P8510|SGH-I497|SPH-P500|SGH-T779|SCH-I705|\n        SCH-I915|GT-N8013|GT-P3113|GT-P5113|GT-P8110|GT-N8010|GT-N8005|GT-N8020|GT-P1013|GT-P6201|\n        GT-P7501|GT-N5100|GT-N5105|GT-N5110|SHV-E140K|SHV-E140L|SHV-E140S|SHV-E150S|SHV-E230K|SHV-E230L|\n        SHV-E230S|SHW-M180K|SHW-M180L|SM-T290|SHW-M180S|SHW-M180W|SHW-M300W|SHW-M305W|SHW-M380K|SHW-M380S|SHW-M380W|\n        SHW-M430W|SHW-M480K|SHW-M480S|SHW-M480W|SHW-M485W|SHW-M486W|SHW-M500W|GT-I9228|SCH-P739|SCH-I925|\n        GT-I9200|GT-P5200|GT-P5210|GT-P5210X|SM-T311|SM-T310|SM-T310X|SM-T210|SM-T210R|SM-T211|SM-P600|\n        SM-P601|SM-P605|SM-P900|SM-P901|SM-T217|SM-T217A|SM-T217S|SM-P6000|SM-T3100|SGH-I467|XE500|SM-T110|\n        GT-P5220|GT-I9200X|GT-N5110X|GT-N5120|SM-P905|SM-T111|SM-T2105|SM-T315|SM-T320|SM-T320X|SM-T321|\n        SM-T510|SM-T520|SM-T525|SM-T530NU|SM-T230NU|SM-T330NU|SM-T900|XE500T1C|SM-P605V|SM-P905V|SM-T337V|SM-T537V|\n        SM-T707V|SM-T807V|SM-P600X|SM-P900X|SM-T210X|SM-T230|SM-T230X|SM-T325|GT-P7503|SM-T531|SM-T330|\n        SM-T530|SM-T705|SM-T705C|SM-T535|SM-T331|SM-T800|SM-T700|SM-T537|SM-T807|SM-P907A|SM-T337A|SM-T537A|\n        SM-T707A|SM-T807A|SM-T237|SM-T807P|SM-P607T|SM-T217T|SM-T337T|SM-T807T|SM-T116NQ|SM-T116BU|SM-P550|\n        SM-T350|SM-T550|SM-T9000|SM-P9000|SM-T705Y|SM-T805|GT-P3113|SM-T710|SM-T810|SM-T815|SM-T360|SM-T533|\n        SM-T113|SM-T335|SM-T715|SM-T560|SM-T670|SM-T677|SM-T377|SM-T567|SM-T357T|SM-T555|SM-T561|SM-T713|\n        SM-T719|SM-T813|SM-T819|SM-T580|SM-T590|SM-T355Y?|SM-T280|SM-T817A|SM-T820|SM-W700|SM-P580|SM-T587|SM-P350|\n        SM-P555M|SM-P355M|SM-T113NU|SM-T815Y|SM-T585|SM-T285|SM-T825|SM-W708|SM-T835`),\n  Kindle: new RegExp(`Kindle|Silk.*Accelerated|Android.*\\\\b(KFOT|KFTT|KFJWI|KFJWA|KFOTE|KFSOWI|KFTHWI|KFTHWA|KFAPWI|\n        KFAPWA|WFJWAE|KFSAWA|KFSAWI|KFASWI|KFARWI|KFFOWI|KFGIWI|KFMEWI)\\\\b|Android.*Silk\\/[0-9.]+ like Chrome\\\n        /[0-9.]+ (?!Mobile)`),\n  SurfaceTablet: /Windows NT [0-9.]+; ARM;.*(Tablet|ARMBJS)/,\n  HPTablet: /HP Slate (7|8|10)|HP ElitePad 900|hp-tablet|EliteBook.*Touch|HP 8|Slate 21|HP SlateBook 10/,\n  AsusTablet: new RegExp(`^.*PadFone((?!Mobile).)*$|Transformer|TF101|TF101G|TF300T|TF300TG|TF300TL|TF700T|TF700KL|\n        TF701T|TF810C|ME171|ME301T|ME302C|ME371MG|ME370T|ME372MG|ME172V|ME173X|ME400C|\n        Slider SL101|\\\\bK00F\\\\b|\\\\bK00C\\\\b|\\\\bK00E\\\\b|\\\\bK00L\\\\b|TX201LA|ME176C|ME102A|\\\\bM80TA\\\\b|ME372CL|\n        ME560CG|ME372CG|ME302KL| K010 | K011 | K017 | K01E |ME572C|ME103K|ME170C|ME171C|\\\\bME70C\\\\b|ME581C|\n        ME581CL|ME8510C|ME181C|P01Y|PO1MA|P01Z|\\\\bP027\\\\b|\\\\bP024\\\\b|\\\\bP00C\\\\b`),\n  BlackBerryTablet: /PlayBook|RIM Tablet/,\n  HTCtablet: /HTC_Flyer_P512|HTC Flyer|HTC Jetstream|HTC-P715a|HTC EVO View 4G|PG41200|PG09410/,\n  MotorolaTablet: /xoom|sholest|MZ615|MZ605|MZ505|MZ601|MZ602|MZ603|MZ604|MZ606|MZ607|MZ608|MZ609|MZ615|MZ616|MZ617/,\n  NookTablet: /Android.*Nook|NookColor|nook browser|BNRV200|BNRV200A|BNTV250|BNTV250A|BNTV400|BNTV600|LogicPD Zoom2/,\n  AcerTablet: new RegExp(`Android.*; \\\\b(A100|A101|A110|A200|A210|A211|A500|A501|A510|A511|A700|A701|W500|W500P|W501|\n        W501P|W510|W511|W700|G100|G100W|B1-A71|B1-710|B1-711|A1-810|A1-811|A1-830)\\\\b|W3-810|\\\\bA3-A10\\\\b|\\\\bA3-A11\\\\b|\n        \\\\bA3-A20\\\\b|\\\\bA3-A30`),\n  ToshibaTablet: /Android.*(AT100|AT105|AT200|AT205|AT270|AT275|AT300|AT305|AT1S5|AT500|AT570|AT700|AT830)|TOSHIBA.*FOLIO/,\n  LGTablet: /\\bL-06C|LG-V909|LG-V900|LG-V700|LG-V510|LG-V500|LG-V410|LG-V400|LG-VK810\\b/,\n  FujitsuTablet: /Android.*\\b(F-01D|F-02F|F-05E|F-10D|M532|Q572)\\b/,\n  PrestigioTablet: new RegExp(`PMP3170B|PMP3270B|PMP3470B|PMP7170B|PMP3370B|PMP3570C|PMP5870C|PMP3670B|PMP5570C|\n        PMP5770D|PMP3970B|PMP3870C|PMP5580C|PMP5880D|PMP5780D|PMP5588C|PMP7280C|PMP7280C3G|PMP7280|PMP7880D|\n        PMP5597D|PMP5597|PMP7100D|PER3464|PER3274|PER3574|PER3884|PER5274|PER5474|PMP5097CPRO|PMP5097|PMP7380D|\n        PMP5297C|PMP5297C_QUAD|PMP812E|PMP812E3G|PMP812F|PMP810E|PMP880TD|PMT3017|PMT3037|PMT3047|PMT3057|PMT7008|\n        PMT5887|PMT5001|PMT5002`),\n  LenovoTablet: new RegExp(`Lenovo TAB|Idea(Tab|Pad)( A1|A10| K1|)|ThinkPad([ ]+)?Tablet|YT3-850M|YT3-X90L|YT3-X90F|\n        YT3-X90X|Lenovo.*(S2109|S2110|S5000|S6000|K3011|A3000|A3500|A1000|A2107|A2109|A1107|A5500|A7600|B6000|\n        B8000|B8080)(-|)(FL|F|HV|H|)|TB-X103F|TB-X304F|TB-X304L|TB-X704F|TB-8703F|Tab2A7-10F|TB2-X30L`),\n  DellTablet: /Venue 11|Venue 8|Venue 7|Dell Streak 10|Dell Streak 7/,\n  YarvikTablet: new RegExp(`Android.*\\\\b(TAB210|TAB211|TAB224|TAB250|TAB260|TAB264|TAB310|TAB360|TAB364|TAB410|TAB411|\n        TAB420|TAB424|TAB450|TAB460|TAB461|TAB464|TAB465|TAB467|TAB468|TAB07-100|TAB07-101|TAB07-150|TAB07-151|\n        TAB07-152|TAB07-200|TAB07-201-3G|TAB07-210|TAB07-211|TAB07-212|TAB07-214|TAB07-220|TAB07-400|TAB07-485|\n        TAB08-150|TAB08-200|TAB08-201-3G|TAB08-201-30|TAB09-100|TAB09-211|TAB09-410|TAB10-150|TAB10-201|TAB10-211|\n        TAB10-400|TAB10-410|TAB13-201|TAB274EUK|TAB275EUK|TAB374EUK|TAB462EUK|TAB474EUK|TAB9-200)\\\\b`),\n  MedionTablet: /Android.*\\bOYO\\b|LIFE.*(P9212|P9514|P9516|S9512)|LIFETAB/,\n  ArnovaTablet: /97G4|AN10G2|AN7bG3|AN7fG3|AN8G3|AN8cG3|AN7G3|AN9G3|AN7dG3|AN7dG3ST|AN7dG3ChildPad|AN10bG3|AN10bG3DT|AN9G2/,\n  IntensoTablet: /INM8002KP|INM1010FP|INM805ND|Intenso Tab|TAB1004/,\n  IRUTablet: /M702pro/,\n  MegafonTablet: /MegaFon V9|\\bZTE V9\\b|Android.*\\bMT7A\\b/,\n  EbodaTablet: /E-Boda (Supreme|Impresspeed|Izzycomm|Essential)/,\n  AllViewTablet: /Allview.*(Viva|Alldro|City|Speed|All TV|Frenzy|Quasar|Shine|TX1|AX1|AX2)/,\n  ArchosTablet: new RegExp(`\\\\b(101G9|80G9|A101IT)\\\\b|Qilive 97R|Archos5|\\\\bARCHOS (70|79|80|90|97|101|FAMILYPAD|)(b|c|)(G10|\n         Cobalt| TITANIUM(HD|)| Xenon| Neon|XSK| 2| XS 2| PLATINUM| CARBON|GAMEPAD)\\\\b`),\n  AinolTablet: /NOVO7|NOVO8|NOVO10|Novo7Aurora|Novo7Basic|NOVO7PALADIN|novo9-Spark/,\n  NokiaLumiaTablet: /Lumia 2520/,\n  SonyTablet: new RegExp(`Sony.*Tablet|Xperia Tablet|Sony Tablet S|SO-03E|SGPT12|SGPT13|SGPT114|SGPT121|SGPT122|SGPT123|\n        SGPT111|SGPT112|SGPT113|SGPT131|SGPT132|SGPT133|SGPT211|SGPT212|SGPT213|SGP311|SGP312|SGP321|EBRD1101|\n        EBRD1102|EBRD1201|SGP351|SGP341|SGP511|SGP512|SGP521|SGP541|SGP551|SGP621|SGP641|SGP612|SOT31|SGP771|SGP611|\n        SGP612|SGP712`),\n  PhilipsTablet: /\\b(PI2010|PI3000|PI3100|PI3105|PI3110|PI3205|PI3210|PI3900|PI4010|PI7000|PI7100)\\b/,\n  CubeTablet: /Android.*(K8GT|U9GT|U10GT|U16GT|U17GT|U18GT|U19GT|U20GT|U23GT|U30GT)|CUBE U8GT/,\n  CobyTablet: new RegExp(`MID1042|MID1045|MID1125|MID1126|MID7012|MID7014|MID7015|MID7034|MID7035|MID7036|MID7042|MID7048|\n        MID7127|MID8042|MID8048|MID8127|MID9042|MID9740|MID9742|MID7022|MID7010`),\n  MIDTablet: new RegExp(`M9701|M9000|M9100|M806|M1052|M806|T703|MID701|MID713|MID710|MID727|MID760|MID830|MID728|MID933|\n        MID125|MID810|MID732|MID120|MID930|MID800|MID731|MID900|MID100|MID820|MID735|MID980|MID130|MID833|MID737|\n        MID960|MID135|MID860|MID736|MID140|MID930|MID835|MID733|MID4X10`),\n  MSITablet: new RegExp(`MSI \\\\b(Primo 73K|Primo 73L|Primo 81L|Primo 77|Primo 93|Primo 75|Primo 76|Primo 73|Primo 81|\n        Primo 91|Primo 90|Enjoy 71|Enjoy 7|Enjoy 10)\\\\b`),\n  SMiTTablet: /Android.*(\\bMID\\b|MID-560|MTV-T1200|MTV-PND531|MTV-P1101|MTV-PND530)/,\n  RockChipTablet: /Android.*(RK2818|RK2808A|RK2918|RK3066)|RK2738|RK2808A/,\n  FlyTablet: /IQ310|Fly Vision/,\n  bqTablet: new RegExp(`Android.*(bq)?.*(Elcano|Curie|Edison|Maxwell|Kepler|Pascal|Tesla|Hypatia|Platon|Newton|\n        Livingstone|Cervantes|Avant|Aquaris ([E|M]10|M8))|Maxwell.*Lite|Maxwell.*Plus`),\n  HuaweiTablet: new RegExp(`MediaPad|MediaPad 7 Youth|MediaPad T3 10|IDEOS S7|S7-201c|S7-202u|S7-101|S7-103|S7-104|S7-105|S7-106|\n        S7-201|S7-Slim|M2-A01L|BAH-L09|BAH-W09|AGS-W09`),\n  NecTablet: /\\bN-06D|\\bN-08D/,\n  PantechTablet: /Pantech.*P4100/,\n  BronchoTablet: /Broncho.*(N701|N708|N802|a710)/,\n  VersusTablet: /TOUCHPAD.*[78910]|\\bTOUCHTAB\\b/,\n  ZyncTablet: /z1000|Z99 2G|z99|z930|z999|z990|z909|Z919|z900/,\n  PositivoTablet: /TB07STA|TB10STA|TB07FTA|TB10FTA/,\n  NabiTablet: /Android.*\\bNabi/,\n  KoboTablet: /Kobo Touch|\\bK080\\b|\\bVox\\b Build|\\bArc\\b Build/,\n  DanewTablet: /DSlide.*\\b(700|701R|702|703R|704|802|970|971|972|973|974|1010|1012)\\b/,\n  TexetTablet: new RegExp(`NaviPad|TB-772A|TM-7045|TM-7055|TM-9750|TM-7016|TM-7024|TM-7026|TM-7041|TM-7043|TM-7047|\n        TM-8041|TM-9741|TM-9747|TM-9748|TM-9751|TM-7022|TM-7021|TM-7020|TM-7011|TM-7010|TM-7023|TM-7025|\n        TM-7037W|TM-7038W|TM-7027W|TM-9720|TM-9725|TM-9737W|TM-1020|TM-9738W|TM-9740|TM-9743W|TB-807A|TB-771A|\n        TB-727A|TB-725A|TB-719A|TB-823A|TB-805A|TB-723A|TB-715A|TB-707A|TB-705A|TB-709A|TB-711A|TB-890HD|\n        TB-880HD|TB-790HD|TB-780HD|TB-770HD|TB-721HD|TB-710HD|TB-434HD|TB-860HD|TB-840HD|TB-760HD|TB-750HD|\n        TB-740HD|TB-730HD|TB-722HD|TB-720HD|TB-700HD|TB-500HD|TB-470HD|TB-431HD|TB-430HD|TB-506|TB-504|TB-446|\n        TB-436|TB-416|TB-146SE|TB-126SE`),\n  PlaystationTablet: /Playstation.*(Portable|Vita)/,\n  TrekstorTablet: /ST10416-1|VT10416-1|ST70408-1|ST702xx-1|ST702xx-2|ST80208|ST97216|ST70104-2|VT10416-2|ST10216-2A|SurfTab/,\n  PyleAudioTablet: /\\b(PTBL10CEU|PTBL10C|PTBL72BC|PTBL72BCEU|PTBL7CEU|PTBL7C|PTBL92BC|PTBL92BCEU|PTBL9CEU|PTBL9CUK|PTBL9C)\\b/,\n  AdvanTablet: new RegExp(`Android.* \\\\b(E3A|T3X|T5C|T5B|T3E|T3C|T3B|T1J|T1F|T2A|T1H|T1i|E1C|T1-E|T5-A|T4|E1-B|T2Ci|\n        T1-B|T1-D|O1-A|E1-A|T1-A|T3A|T4i)\\\\b`),\n  DanyTechTablet: `Genius Tab G3|Genius Tab S2|Genius Tab Q3|Genius Tab G4|Genius Tab Q4|Genius Tab G-II|\n        Genius TAB GII|Genius TAB GIII|Genius Tab S1`,\n  GalapadTablet: /Android.*\\bG1\\b(?!\\))/,\n  MicromaxTablet: /Funbook|Micromax.*\\b(P250|P560|P360|P362|P600|P300|P350|P500|P275)\\b/,\n  KarbonnTablet: /Android.*\\b(A39|A37|A34|ST8|ST10|ST7|Smart Tab3|Smart Tab2)\\b/,\n  AllFineTablet: /Fine7 Genius|Fine7 Shine|Fine7 Air|Fine8 Style|Fine9 More|Fine10 Joy|Fine11 Wide/,\n  PROSCANTablet: new RegExp(`\\\\b(PEM63|PLT1023G|PLT1041|PLT1044|PLT1044G|PLT1091|PLT4311|PLT4311PL|PLT4315|PLT7030|\n        PLT7033|PLT7033D|PLT7035|PLT7035D|PLT7044K|PLT7045K|PLT7045KB|PLT7071KG|PLT7072|PLT7223G|PLT7225G|\n        PLT7777G|PLT7810K|PLT7849G|PLT7851G|PLT7852G|PLT8015|PLT8031|PLT8034|PLT8036|PLT8080K|PLT8082|PLT8088|\n        PLT8223G|PLT8234G|PLT8235G|PLT8816K|PLT9011|PLT9045K|PLT9233G|PLT9735|PLT9760G|PLT9770G)\\\\b`),\n  YONESTablet: /BQ1078|BC1003|BC1077|RK9702|BC9730|BC9001|IT9001|BC7008|BC7010|BC708|BC728|BC7012|BC7030|BC7027|BC7026/,\n  ChangJiaTablet: new RegExp(`TPC7102|TPC7103|TPC7105|TPC7106|TPC7107|TPC7201|TPC7203|TPC7205|TPC7210|TPC7708|TPC7709|\n        TPC7712|TPC7110|TPC8101|TPC8103|TPC8105|TPC8106|TPC8203|TPC8205|TPC8503|TPC9106|TPC9701|TPC97101|TPC97103|\n        TPC97105|TPC97106|TPC97111|TPC97113|TPC97203|TPC97603|TPC97809|TPC97205|TPC10101|TPC10103|TPC10106|\n        TPC10111|TPC10203|TPC10205|TPC10503`),\n  GUTablet: /TX-A1301|TX-M9002|Q702|kf026/,\n  PointOfViewTablet: new RegExp(`TAB-P506|TAB-navi-7-3G-M|TAB-P517|TAB-P-527|TAB-P701|TAB-P703|TAB-P721|TAB-P731N|\n        TAB-P741|TAB-P825|TAB-P905|TAB-P925|TAB-PR945|TAB-PL1015|TAB-P1025|TAB-PI1045|TAB-P1325|TAB-PROTAB[0-9]+|\n        TAB-PROTAB25|TAB-PROTAB26|TAB-PROTAB27|TAB-PROTAB26XL|TAB-PROTAB2-IPS9|TAB-PROTAB30-IPS9|TAB-PROTAB25XXL|\n        TAB-PROTAB26-IPS10|TAB-PROTAB30-IPS10`),\n  OvermaxTablet: new RegExp(`OV-(SteelCore|NewBase|Basecore|Baseone|Exellen|Quattor|EduTab|Solution|ACTION|BasicTab|TeddyTab|\n        MagicTab|Stream|TB-08|TB-09)|Qualcore 1027`),\n  HCLTablet: /HCL.*Tablet|Connect-3G-2.0|Connect-2G-2.0|ME Tablet U1|ME Tablet U2|ME Tablet G1|ME Tablet X1|ME Tablet Y2|ME Tablet Sync/,\n  DPSTablet: /DPS Dream 9|DPS Dual 7/,\n  VistureTablet: /V97 HD|i75 3G|Visture V4( HD)?|Visture V5( HD)?|Visture V10/,\n  CrestaTablet: /CTP(-)?810|CTP(-)?818|CTP(-)?828|CTP(-)?838|CTP(-)?888|CTP(-)?978|CTP(-)?980|CTP(-)?987|CTP(-)?988|CTP(-)?989/,\n  MediatekTablet: /\\bMT8125|MT8389|MT8135|MT8377\\b/,\n  ConcordeTablet: /Concorde([ ]+)?Tab|ConCorde ReadMan/,\n  GoCleverTablet: new RegExp(`GOCLEVER TAB|A7GOCLEVER|M1042|M7841|M742|R1042BK|R1041|TAB A975|TAB A7842|TAB A741|TAB A741L|TAB M723G|\n        TAB M721|TAB A1021|TAB I921|TAB R721|TAB I720|TAB T76|TAB R70|TAB R76.2|TAB R106|TAB R83.2|TAB M813G|TAB I721|\n        GCTA722|TAB I70|TAB I71|TAB S73|TAB R73|TAB R74|TAB R93|TAB R75|TAB R76.1|TAB A73|TAB A93|TAB A93.2|TAB T72|\n        TAB R83|TAB R974|TAB R973|TAB A101|TAB A103|TAB A104|TAB A104.2|R105BK|M713G|A972BK|TAB A971|TAB R974.2|\n        TAB R104|TAB R83.3|TAB A1042`),\n  ModecomTablet: new RegExp(`FreeTAB 9000|FreeTAB 7.4|FreeTAB 7004|FreeTAB 7800|FreeTAB 2096|FreeTAB 7.5|FreeTAB 1014|\n        FreeTAB 1001 |FreeTAB 8001|FreeTAB 9706|FreeTAB 9702|FreeTAB 7003|FreeTAB 7002|FreeTAB 1002|FreeTAB 7801|\n        FreeTAB 1331|FreeTAB 1004|FreeTAB 8002|FreeTAB 8014|FreeTAB 9704|FreeTAB 1003`),\n  VoninoTablet: new RegExp(`\\\\b(Argus[ _]?S|Diamond[ _]?79HD|Emerald[ _]?78E|Luna[ _]?70C|Onyx[ _]?S|Onyx[ _]?Z|\n        Orin[ _]?HD|Orin[ _]?S|Otis[ _]?S|SpeedStar[ _]?S|Magnet[ _]?M9|Primus[ _]?94[ _]?3G|Primus[ _]?94HD|\n        Primus[ _]?QS|Android.*\\\\bQ8\\\\b|Sirius[ _]?EVO[ _]?QS|Sirius[ _]?QS|Spirit[ _]?S)\\\\b`),\n  ECSTablet: /V07OT2|TM105A|S10OT1|TR10CS1/,\n  StorexTablet: /eZee[_']?(Tab|Go)[0-9]+|TabLC7|Looney Tunes Tab/,\n  VodafoneTablet: /SmartTab([ ]+)?[0-9]+|SmartTabII10|SmartTabII7|VF-1497/,\n  EssentielBTablet: /Smart[ ']?TAB[ ]+?[0-9]+|Family[ ']?TAB2/,\n  RossMoorTablet: /RM-790|RM-997|RMD-878G|RMD-974R|RMT-705A|RMT-701|RME-601|RMT-501|RMT-711/,\n  iMobileTablet: /i-mobile i-note/,\n  TolinoTablet: /tolino tab [0-9.]+|tolino shine/,\n  AudioSonicTablet: /\\bC-22Q|T7-QC|T-17B|T-17P\\b/,\n  AMPETablet: /Android.* A78 /,\n  SkkTablet: /Android.* (SKYPAD|PHOENIX|CYCLOPS)/,\n  TecnoTablet: /TECNO P9|TECNO DP8D/,\n  JXDTablet: new RegExp(`Android.* \\\\b(F3000|A3300|JXD5000|JXD3000|JXD2000|JXD300B|JXD300|S5800|S7800|S602b|S5110b|S7300|\n        S5300|S602|S603|S5100|S5110|S601|S7100a|P3000F|P3000s|P101|P200s|P1000m|P200m|P9100|P1000s|S6600b|S908|\n        P1000|P300|S18|S6600|S9100)\\\\b`),\n  iJoyTablet: new RegExp(`Tablet (Spirit 7|Essentia|Galatea|Fusion|Onix 7|Landa|Titan|Scooby|Deox|Stella|Themis|Argon|\n        Unique 7|Sygnus|Hexen|Finity 7|Cream|Cream X2|Jade|Neon 7|Neron 7|Kandy|Scape|Saphyr 7|Rebel|Biox|Rebel|\n        Rebel 8GB|Myst|Draco 7|Myst|Tab7-004|Myst|Tadeo Jones|Tablet Boing|Arrow|Draco Dual Cam|Aurix|Mint|Amity|\n        Revolution|Finity 9|Neon 9|T9w|Amity 4GB Dual Cam|Stone 4GB|Stone 8GB|Andromeda|Silken|X2|Andromeda II|\n        Halley|Flame|Saphyr 9,7|Touch 8|Planet|Triton|Unique 10|Hexen 10|Memphis 4GB|Memphis 8GB|Onix 10)`),\n  FX2Tablet: /FX2 PAD7|FX2 PAD10/,\n  XoroTablet: new RegExp(`KidsPAD 701|PAD[ ]?712|PAD[ ]?714|PAD[ ]?716|PAD[ ]?717|PAD[ ]?718|PAD[ ]?720|PAD[ ]?721|\n        PAD[ ]?722|PAD[ ]?790|PAD[ ]?792|PAD[ ]?900|PAD[ ]?9715D|PAD[ ]?9716DR|PAD[ ]?9718DR|PAD[ ]?9719QR|\n        PAD[ ]?9720QR|TelePAD1030|Telepad1032|TelePAD730|TelePAD731|TelePAD732|TelePAD735Q|TelePAD830|TelePAD9730|\n        TelePAD795|MegaPAD 1331|MegaPAD 1851|MegaPAD 2151`),\n  ViewsonicTablet: /ViewPad 10pi|ViewPad 10e|ViewPad 10s|ViewPad E72|ViewPad7|ViewPad E100|ViewPad 7e|ViewSonic VB733|VB100a/,\n  VerizonTablet: /QTAQZ3|QTAIR7|QTAQTZ3|QTASUN1|QTASUN2|QTAXIA1/,\n  OdysTablet: /LOOX|XENO10|ODYS[ -](Space|EVO|Xpress|NOON)|\\bXELIO\\b|Xelio10Pro|XELIO7PHONETAB|XELIO10EXTREME|XELIOPT2|NEO_QUAD10/,\n  CaptivaTablet: /CAPTIVA PAD/,\n  IconbitTablet: new RegExp(`NetTAB|NT-3702|NT-3702S|NT-3702S|NT-3603P|NT-3603P|NT-0704S|NT-0704S|NT-3805C|NT-3805C|\n        NT-0806C|NT-0806C|NT-0909T|NT-0909T|NT-0907S|NT-0907S|NT-0902S|NT-0902S`),\n  TeclastTablet: new RegExp(`T98 4G|\\\\bP80\\\\b|\\\\bX90HD\\\\b|X98 Air|X98 Air 3G|\\\\bX89\\\\b|P80 3G|\\\\bX80h\\\\b|P98 Air|\n        \\\\bX89HD\\\\b|P98 3G|\\\\bP90HD\\\\b|P89 3G|X98 3G|\\\\bP70h\\\\b|P79HD 3G|G18d 3G|\\\\bP79HD\\\\b|\\\\bP89s\\\\b|\\\\bA88\\\\b|\n        \\\\bP10HD\\\\b|\\\\bP19HD\\\\b|G18 3G|\\\\bP78HD\\\\b|\\\\bA78\\\\b|\\\\bP75\\\\b|G17s 3G|G17h 3G|\\\\bP85t\\\\b|\\\\bP90\\\\b|\n        \\\\bP11\\\\b|\\\\bP98t\\\\b|\\\\bP98HD\\\\b|\\\\bG18d\\\\b|\\\\bP85s\\\\b|\\\\bP11HD\\\\b|\\\\bP88s\\\\b|\\\\bA80HD\\\\b|\\\\bA80se\\\\b|\n        \\\\bA10h\\\\b|\\\\bP89\\\\b|\\\\bP78s\\\\b|\\\\bG18\\\\b|\\\\bP85\\\\b|\\\\bA70h\\\\b|\\\\bA70\\\\b|\\\\bG17\\\\b|\\\\bP18\\\\b|\\\\bA80s\\\\b|\n        \\\\bA11s\\\\b|\\\\bP88HD\\\\b|\\\\bA80h\\\\b|\\\\bP76s\\\\b|\\\\bP76h\\\\b|\\\\bP98\\\\b|\\\\bA10HD\\\\b|\\\\bP78\\\\b|\\\\bP88\\\\b|\\\\bA11\\\\b|\n        \\\\bA10t\\\\b|\\\\bP76a\\\\b|\\\\bP76t\\\\b|\\\\bP76e\\\\b|\\\\bP85HD\\\\b|\\\\bP85a\\\\b|\\\\bP86\\\\b|\\\\bP75HD\\\\b|\\\\bP76v\\\\b|\\\\bA12\\\\b|\n        \\\\bP75a\\\\b|\\\\bA15\\\\b|\\\\bP76Ti\\\\b|\\\\bP81HD\\\\b|\\\\bA10\\\\b|\\\\bT760VE\\\\b|\\\\bT720HD\\\\b|\\\\bP76\\\\b|\\\\bP73\\\\b|\\\\bP71\\\\b|\n        \\\\bP72\\\\b|\\\\bT720SE\\\\b|\\\\bC520Ti\\\\b|\\\\bT760\\\\b|\\\\bT720VE\\\\b|T720-3GE|T720-WiFi`),\n  OndaTablet: new RegExp(`\\\\b(V975i|Vi30|VX530|V701|Vi60|V701s|Vi50|V801s|V719|Vx610w|VX610W|V819i|Vi10|VX580W|Vi10|\n        V711s|V813|V811|V820w|V820|Vi20|V711|VI30W|V712|V891w|V972|V819w|V820w|Vi60|V820w|V711|V813s|V801|V819|\n        V975s|V801|V819|V819|V818|V811|V712|V975m|V101w|V961w|V812|V818|V971|V971s|V919|V989|V116w|V102w|V973|\n        Vi40)\\\\b[\\s]+|V10 \\\\b4G\\\\b`),\n  JaytechTablet: /TPC-PA762/,\n  BlaupunktTablet: /Endeavour 800NG|Endeavour 1010/,\n  DigmaTablet: /\\b(iDx10|iDx9|iDx8|iDx7|iDxD7|iDxD8|iDsQ8|iDsQ7|iDsQ8|iDsD10|iDnD7|3TS804H|iDsQ11|iDj7|iDs10)\\b/,\n  EvolioTablet: /ARIA_Mini_wifi|Aria[ _]Mini|Evolio X10|Evolio X7|Evolio X8|\\bEvotab\\b|\\bNeura\\b/,\n  LavaTablet: /QPAD E704|\\bIvoryS\\b|E-TAB IVORY|\\bE-TAB\\b/,\n  AocTablet: /MW0811|MW0812|MW0922|MTK8382|MW1031|MW0831|MW0821|MW0931|MW0712/,\n  MpmanTablet: new RegExp(`MP11 OCTA|MP10 OCTA|MPQC1114|MPQC1004|MPQC994|MPQC974|MPQC973|MPQC804|MPQC784|MPQC780|\n        \\\\bMPG7\\\\b|MPDCG75|MPDCG71|MPDC1006|MP101DC|MPDC9000|MPDC905|MPDC706HD|MPDC706|MPDC705|MPDC110|\n        MPDC100|MPDC99|MPDC97|MPDC88|MPDC8|MPDC77|MP709|MID701|MID711|MID170|MPDC703|MPQC1010`),\n  CelkonTablet: /CT695|CT888|CT[\\s]?910|CT7 Tab|CT9 Tab|CT3 Tab|CT2 Tab|CT1 Tab|C820|C720|\\bCT-1\\b/,\n  WolderTablet: new RegExp(`miTab \\\\b(DIAMOND|SPACE|BROOKLYN|NEO|FLY|MANHATTAN|FUNK|EVOLUTION|SKY|GOCAR|IRON|GENIUS|\n        POP|MINT|EPSILON|BROADWAY|JUMP|HOP|LEGEND|NEW AGE|LINE|ADVANCE|FEEL|FOLLOW|LIKE|LINK|LIVE|THINK|\n        FREEDOM|CHICAGO|CLEVELAND|BALTIMORE-GH|IOWA|BOSTON|SEATTLE|PHOENIX|DALLAS|IN 101|MasterChef)\\\\b`),\n  MediacomTablet: 'M-MPI10C3G|M-SP10EG|M-SP10EGP|M-SP10HXAH|M-SP7HXAH|M-SP10HXBH|M-SP8HXAH|M-SP8MXA',\n  MiTablet: /\\bMI PAD\\b|\\bHM NOTE 1W\\b/,\n  NibiruTablet: /Nibiru M1|Nibiru Jupiter One/,\n  NexoTablet: /NEXO NOVA|NEXO 10|NEXO AVIO|NEXO FREE|NEXO GO|NEXO EVO|NEXO 3G|NEXO SMART|NEXO KIDDO|NEXO MOBI/,\n  LeaderTablet: new RegExp(`TBLT10Q|TBLT10I|TBL-10WDKB|TBL-10WDKBO2013|TBL-W230V2|TBL-W450|TBL-W500|SV572|TBLT7I|\n        TBA-AC7-8G|TBLT79|TBL-8W16|TBL-10W32|TBL-10WKB|TBL-W100`),\n  UbislateTablet: /UbiSlate[\\s]?7C/,\n  PocketBookTablet: /Pocketbook/,\n  KocasoTablet: /\\b(TB-1207)\\b/,\n  HisenseTablet: /\\b(F5281|E2371)\\b/,\n  Hudl: /Hudl HT7S3|Hudl 2/,\n  TelstraTablet: /T-Hub2/,\n  GenericTablet: new RegExp(`Android.*\\\\b97D\\\\b|Tablet(?!.*PC)|BNTV250A|MID-WCDMA|LogicPD Zoom2|\\\\bA7EB\\\\b|CatNova8|\n        A1_07|CT704|CT1002|\\\\bM721\\\\b|rk30sdk|\\\\bEVOTAB\\\\b|M758A|ET904|ALUMIUM10|Smartfren Tab|Endeavour 1010|\n        Tablet-PC-4|Tagi Tab|\\\\bM6pro\\\\b|CT1020W|arc 10HD|\\\\bTP750\\\\b|\\\\bQTAQZ3\\\\b|WVT101|TM1088|KT107`),\n};\n\nexport const DEVICES = {\n  BLACKBERRY: 'Blackberry',\n  FIREFOX_OS: 'Firefox-OS',\n  CHROME_BOOK: 'Chrome-Book',\n  WINDOWS_PHONE: 'Windows-Phone',\n  VITA: 'Vita',\n  PS4: 'PS4',\n  CHROMECAST: 'Chromecast',\n  APPLE_TV: 'Apple-TV',\n  GOOGLE_TV: 'Google-TV',\n  ANDROID: 'Android',\n  Tesla: 'Tesla',\n  iPad: 'iPad',\n  IPHONE: 'iPhone',\n  iPod: 'iPod',\n  UNKNOWN: 'Unknown',\n  HTC: 'HTC',\n  NEXUS_PHONE: 'Nexus Phone',\n  NexusTablet: 'Nexus Tablet',\n  DELL: 'Dell',\n  MOTOROLA: 'Motorola',\n  SAMSUNG: 'Samsung',\n  LG: 'LG',\n  SONY: 'Sony',\n  ASUS: 'Asus',\n  NOKIA_LUMIA: 'Nokia Lumia',\n  MICROMAX: 'Micromax',\n  PALM: 'Palm',\n  VERTU: 'Vertu',\n  PANTECH: 'PANTECH',\n  FLY: 'Fly',\n  WIKO: `WIKO`,\n  I_MOBILE: 'i-mobile',\n  SIMVALLEY: 'Simvalley',\n  WOLFGANG: 'Wolfgang',\n  ALCATEL: 'Alcatel',\n  NINTENDO: 'Nintendo',\n  AMOI: 'Amoi',\n  INQ: 'INQ',\n  GENERIC_PHONE: 'Generic Phone',\n};\n\nexport const OS = {\n  WINDOWS: 'Windows',\n  MAC: 'Mac',\n  IOS: 'iOS',\n  ANDROID: 'Android',\n  LINUX: 'Linux',\n  UNIX: 'Unix',\n  FIREFOX_OS: 'Firefox-OS',\n  CHROME_OS: 'Chrome-OS',\n  WINDOWS_PHONE: 'Windows-Phone',\n  UNKNOWN: 'Unknown',\n};\n\nexport const OS_VERSIONS: any = {\n  WINDOWS_3_11: 'windows-3-11',\n  WINDOWS_95: 'windows-95',\n  WINDOWS_ME: 'windows-me',\n  WINDOWS_98: 'windows-98',\n  WINDOWS_CE: 'windows-ce',\n  WINDOWS_2000: 'windows-2000',\n  WINDOWS_XP: 'windows-xp',\n  WINDOWS_SERVER_2003: 'windows-server-2003',\n  WINDOWS_VISTA: 'windows-vista',\n  WINDOWS_7: 'windows-7',\n  WINDOWS_8_1: 'windows-8-1',\n  WINDOWS_8: 'windows-8',\n  WINDOWS_10: 'windows-10',\n  WINDOWS_PHONE_7_5: 'windows-phone-7-5',\n  WINDOWS_PHONE_8_1: 'windows-phone-8-1',\n  WINDOWS_PHONE_10: 'windows-phone-10',\n  WINDOWS_NT_4_0: 'windows-nt-4-0',\n  MACOSX_15: 'mac-os-x-15',\n  MACOSX_14: 'mac-os-x-14',\n  MACOSX_13: 'mac-os-x-13',\n  MACOSX_12: 'mac-os-x-12',\n  MACOSX_11: 'mac-os-x-11',\n  MACOSX_10: 'mac-os-x-10',\n  MACOSX_9: 'mac-os-x-9',\n  MACOSX_8: 'mac-os-x-8',\n  MACOSX_7: 'mac-os-x-7',\n  MACOSX_6: 'mac-os-x-6',\n  MACOSX_5: 'mac-os-x-5',\n  MACOSX_4: 'mac-os-x-4',\n  MACOSX_3: 'mac-os-x-3',\n  MACOSX_2: 'mac-os-x-2',\n  MACOSX: 'mac-os-x',\n  iOS: 'iOS',\n  UNKNOWN: 'unknown',\n};\n\nexport const OS_RE: any = {\n  WINDOWS: {\n    and: [{ or: [/\\bWindows|(Win\\d\\d)\\b/, /\\bWin 9x\\b/] }, { not: /\\bWindows Phone\\b/ }],\n  },\n  MAC: {\n    and: [/\\bMac OS\\b/, { not: { or: [/\\biPhone\\b/, /\\bWindows Phone\\b/] } }],\n  },\n  IOS: {\n    and: [{ or: [/\\biPad\\b/, /\\biPhone\\b/, /\\biPod\\b/] }, { not: /\\bWindows Phone\\b/ }],\n  },\n  ANDROID: { and: [/\\bAndroid\\b/, { not: /\\bWindows Phone\\b/ }] },\n  LINUX: /\\bLinux\\b/,\n  UNIX: /\\bUNIX\\b/,\n  FIREFOX_OS: { and: [/\\bFirefox\\b/, /Mobile\\b/] },\n  CHROME_OS: /\\bCrOS\\b/,\n  WINDOWS_PHONE: { or: [/\\bIEMobile\\b/, /\\bWindows Phone\\b/] },\n  PS4: /\\bMozilla\\/5.0 \\(PlayStation 4\\b/,\n  VITA: /\\bMozilla\\/5.0 \\(Play(S|s)tation Vita\\b/,\n};\n\nexport const BROWSERS_RE: any = {\n  CHROME: {\n    and: [\n      { or: [/\\bChrome\\b/, /\\bCriOS\\b/, /\\bHeadlessChrome\\b/] },\n      {\n        not: {\n          or: [/\\bOPR\\b/, /\\bEdg(e|A|iOS)\\b/, /\\bEdg\\/\\b/, /\\bSamsungBrowser\\b/, /\\bUCBrowser\\b/],\n        },\n      },\n    ],\n  },\n  FIREFOX: { or: [/\\bFirefox\\b/, /\\bFxiOS\\b/] },\n  SAFARI: {\n    and: [\n      /^((?!CriOS).)*\\Safari\\b.*$/,\n      {\n        not: {\n          or: [/\\bOPR\\b/, /\\bEdg(e|A|iOS)\\b/, /\\bEdg\\/\\b/, /\\bWindows Phone\\b/, /\\bSamsungBrowser\\b/, /\\bUCBrowser\\b/],\n        },\n      },\n    ],\n  },\n  OPERA: { or: [/Opera\\b/, /\\bOPR\\b/] },\n  IE: {\n    or: [/\\bMSIE\\b/, /\\bTrident\\b/, /^Mozilla\\/5\\.0 \\(Windows NT 10\\.0; Win64; x64\\)$/],\n  },\n  MS_EDGE: { or: [/\\bEdg(e|A|iOS)\\b/] },\n  MS_EDGE_CHROMIUM: /\\bEdg\\/\\b/,\n  PS4: /\\bMozilla\\/5.0 \\(PlayStation 4\\b/,\n  VITA: /\\bMozilla\\/5.0 \\(Play(S|s)tation Vita\\b/,\n  FB_MESSANGER: /\\bFBAN\\/MessengerForiOS\\b/,\n  SAMSUNG: /\\bSamsungBrowser\\b/,\n  UCBROWSER: /\\bUCBrowser\\b/,\n};\n\nexport const DEVICES_RE: any = {\n  ...MOBILES_RE,\n  ...TABLETS_RE,\n  FIREFOX_OS: { and: [/\\bFirefox\\b/, /\\bMobile\\b/] },\n  CHROME_BOOK: /\\bCrOS\\b/,\n  PS4: /\\bMozilla\\/5.0 \\(PlayStation 4\\b/,\n  CHROMECAST: /\\bCrKey\\b/,\n  APPLE_TV: /^iTunes-AppleTV\\/4.1$/,\n  GOOGLE_TV: /\\bGoogleTV\\b/,\n  Tesla: /Tesla\\/([0-9]{4}.[0-9]{1,2}.?[0-9]{0,2}.?[0-9]{0,2})-(.{7})/,\n};\n\nexport const OS_VERSIONS_RE_MAP: any = {\n  WINDOWS_3_11: /Win16/,\n  WINDOWS_95: /(Windows 95|Win95|Windows_95)/,\n  WINDOWS_ME: /(Win 9x 4.90|Windows ME)/,\n  WINDOWS_98: /(Windows 98|Win98)/,\n  WINDOWS_CE: /Windows CE/,\n  WINDOWS_2000: /(Windows NT 5.0|Windows 2000)/,\n  WINDOWS_XP: /(Windows NT 5.1|Windows XP)/,\n  WINDOWS_SERVER_2003: /Windows NT 5.2/,\n  WINDOWS_VISTA: /Windows NT 6.0/,\n  WINDOWS_7: /(Windows 7|Windows NT 6.1)/,\n  WINDOWS_8_1: /(Windows 8.1|Windows NT 6.3)/,\n  WINDOWS_8: /(Windows 8|Windows NT 6.2)/,\n  WINDOWS_10: /(Windows NT 10.0)/,\n  WINDOWS_PHONE_7_5: /(Windows Phone OS 7.5)/,\n  WINDOWS_PHONE_8_1: /(Windows Phone 8.1)/,\n  WINDOWS_PHONE_10: /(Windows Phone 10)/,\n  WINDOWS_NT_4_0: {\n    and: [/(Windows NT 4.0|WinNT4.0|WinNT|Windows NT)/, { not: /Windows NT 10.0/ }],\n  },\n  MACOSX: /(MAC OS X\\s*[^ 0-9])/,\n  MACOSX_3: /(Darwin 10.3|Mac OS X 10.3)/,\n  MACOSX_4: /(Darwin 10.4|Mac OS X 10.4)/,\n  MACOSX_5: /(Mac OS X 10.5)/,\n  MACOSX_6: /(Mac OS X 10.6)/,\n  MACOSX_7: /(Mac OS X 10.7)/,\n  MACOSX_8: /(Mac OS X 10.8)/,\n  MACOSX_9: /(Mac OS X 10.9)/,\n  MACOSX_10: /(Mac OS X 10.10)/,\n  MACOSX_11: /(Mac OS X 10.11)/,\n  MACOSX_12: /(Mac OS X 10.12)/,\n  MACOSX_13: /(Mac OS X 10.13)/,\n  MACOSX_14: /(Mac OS X 10.14)/,\n  MACOSX_15: /(Mac OS X 10.15)/,\n  iOS: /(iPhone OS\\s*[0-9_]+)/,\n};\n\nexport const BROWSER_VERSIONS_RE_MAP: any = {\n  CHROME: [/\\bChrome\\/([\\d\\.]+)\\b/, /\\bCriOS\\/([\\d\\.]+)\\b/, /\\bHeadlessChrome\\/([\\d\\.]+)\\b/],\n  FIREFOX: [/\\bFirefox\\/([\\d\\.]+)\\b/, /\\bFxiOS\\/([\\d\\.]+)\\b/],\n  SAFARI: [/\\bVersion\\/([\\d\\.]+)\\b/, /\\bSafari\\/([\\d\\.]+)\\b/],\n  OPERA: [/\\bVersion\\/([\\d\\.]+)\\b/, /\\bOPR\\/([\\d\\.]+)\\b/],\n  IE: [/\\bMSIE ([\\d\\.]+\\w?)\\b/, /\\brv:([\\d\\.]+\\w?)\\b/],\n  MS_EDGE: /\\bEdg(?:e|A|iOS)\\/([\\d\\.]+)\\b/,\n  MS_EDGE_CHROMIUM: /\\bEdg\\/([\\d\\.]+)\\b/,\n  SAMSUNG: /\\bSamsungBrowser\\/([\\d\\.]+)\\b/,\n  UCBROWSER: /\\bUCBrowser\\/([\\d\\.]+)\\b/,\n};\n\nexport const OS_VERSIONS_RE: any = Object.keys(OS_VERSIONS_RE_MAP).reduce((obj, key: string) => {\n  obj[key] = OS_VERSIONS_RE_MAP[key];\n  return obj;\n}, {});\n\nexport const BROWSER_VERSIONS_RE: any = Object.keys(BROWSER_VERSIONS_RE_MAP).reduce((obj, key: string) => {\n  obj[BROWSERS[key]] = BROWSER_VERSIONS_RE_MAP[key];\n  return obj;\n}, {});\n","/**\n * Created by ahsanayaz on 08/11/2016.\n */\n\nexport class ReTree {\n  constructor() {}\n\n  public test(str: string, regex: any): any {\n    if (typeof regex === 'string') {\n      regex = new RegExp(regex);\n    }\n\n    if (regex instanceof RegExp) {\n      return regex.test(str);\n    } else if (regex && Array.isArray(regex.and)) {\n      return regex.and.every((item: any) => {\n        return this.test(str, item);\n      });\n    } else if (regex && Array.isArray(regex.or)) {\n      return regex.or.some((item: any) => {\n        return this.test(str, item);\n      });\n    } else if (regex && regex.not) {\n      return !this.test(str, regex.not);\n    } else {\n      return false;\n    }\n  }\n\n  public exec(str: string, regex: any): any {\n    if (typeof regex === 'string') {\n      regex = new RegExp(regex);\n    }\n\n    if (regex instanceof RegExp) {\n      return regex.exec(str);\n    } else if (regex && Array.isArray(regex)) {\n      return regex.reduce((res: any, item: any) => {\n        return !!res ? res : this.exec(str, item);\n      }, null);\n    } else {\n      return null;\n    }\n  }\n}\n","// tslint:disable: variable-name\n/**\n * Created by ahsanayaz on 08/11/2016.\n */\nimport { PLATFORM_ID, Inject, Injectable } from '@angular/core';\nimport { isPlatformBrowser } from '@angular/common';\nimport * as Constants from './device-detector.constants';\nimport { ReTree } from './retree';\n\nexport interface DeviceInfo {\n  userAgent: string;\n  os: string;\n  browser: string;\n  device: string;\n  os_version: string;\n  browser_version: string;\n}\n\nconst iPad = 'iPad';\n\n@Injectable({\n  providedIn: 'root',\n})\nexport class DeviceDetectorService {\n  ua = '';\n  userAgent = '';\n  os = '';\n  browser = '';\n  device = '';\n  os_version = '';\n  browser_version = '';\n  reTree = new ReTree();\n  constructor(@Inject(PLATFORM_ID) private platformId: any) {\n    if (isPlatformBrowser(this.platformId) && typeof window !== 'undefined') {\n      this.userAgent = window.navigator.userAgent;\n    }\n    this.setDeviceInfo(this.userAgent);\n  }\n\n  /**\n   * @author Ahsan Ayaz\n   * @desc Sets the initial value of the device when the service is initiated.\n   * This value is later accessible for usage\n   */\n  setDeviceInfo(ua = this.userAgent): void {\n    if (ua !== this.userAgent) {\n      this.userAgent = ua;\n    }\n    const mappings = [\n      { const: 'OS', prop: 'os' },\n      { const: 'BROWSERS', prop: 'browser' },\n      { const: 'DEVICES', prop: 'device' },\n      { const: 'OS_VERSIONS', prop: 'os_version' },\n    ];\n\n    mappings.forEach(mapping => {\n      this[mapping.prop] = Object.keys(Constants[mapping.const]).reduce((obj: any, item: any) => {\n        if (Constants[mapping.const][item] === 'device') {\n          // hack for iOS 13 Tablet\n          if (\n            isPlatformBrowser(this.platformId) &&\n            (!!this.reTree.test(this.userAgent, Constants.TABLETS_RE[iPad]) ||\n              (navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1))\n          ) {\n            obj[Constants[mapping.const][item]] = iPad;\n            return Object;\n          }\n        }\n        obj[Constants[mapping.const][item]] = this.reTree.test(ua, Constants[`${mapping.const}_RE`][item]);\n        return obj;\n      }, {});\n    });\n\n    mappings.forEach(mapping => {\n      this[mapping.prop] = Object.keys(Constants[mapping.const])\n        .map(key => {\n          return Constants[mapping.const][key];\n        })\n        .reduce((previousValue, currentValue) => {\n          if (mapping.prop === 'device' && previousValue === Constants[mapping.const].ANDROID) {\n            // if we have the actual device found, instead of 'Android', return the actual device\n            return this[mapping.prop][currentValue] ? currentValue : previousValue;\n          } else {\n            return previousValue === Constants[mapping.const].UNKNOWN && this[mapping.prop][currentValue]\n              ? currentValue\n              : previousValue;\n          }\n        }, Constants[mapping.const].UNKNOWN);\n    });\n\n    this.browser_version = '0';\n    if (this.browser !== Constants.BROWSERS.UNKNOWN) {\n      const re = Constants.BROWSER_VERSIONS_RE[this.browser];\n      const res = this.reTree.exec(ua, re);\n      if (!!res) {\n        this.browser_version = res[1];\n      }\n    }\n  }\n\n  /**\n   * @author Ahsan Ayaz\n   * @desc Returns the device information\n   * @returns the device information object.\n   */\n  public getDeviceInfo(): DeviceInfo {\n    const deviceInfo: DeviceInfo = {\n      userAgent: this.userAgent,\n      os: this.os,\n      browser: this.browser,\n      device: this.device,\n      os_version: this.os_version,\n      browser_version: this.browser_version,\n    };\n    return deviceInfo;\n  }\n\n  /**\n   * @author Ahsan Ayaz\n   * @desc Compares the current device info with the mobile devices to check\n   * if the current device is a mobile and also check current device is tablet so it will return false.\n   * @returns whether the current device is a mobile\n   */\n  public isMobile(userAgent = this.userAgent): boolean {\n    if (this.isTablet(userAgent)) {\n      return false;\n    }\n    const match = Object.keys(Constants.MOBILES_RE).find(mobile => {\n      return this.reTree.test(userAgent, Constants.MOBILES_RE[mobile]);\n    });\n    return !!match;\n  }\n\n  /**\n   * @author Ahsan Ayaz\n   * @desc Compares the current device info with the tablet devices to check\n   * if the current device is a tablet.\n   * @returns whether the current device is a tablet\n   */\n  public isTablet(userAgent = this.userAgent): boolean {\n    if (\n      isPlatformBrowser(this.platformId) &&\n      (!!this.reTree.test(this.userAgent, Constants.TABLETS_RE[iPad]) ||\n        (typeof navigator !== 'undefined' && navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1))\n    ) {\n      return true;\n    }\n    const match = Object.keys(Constants.TABLETS_RE).find(mobile => {\n      return !!this.reTree.test(userAgent, Constants.TABLETS_RE[mobile]);\n    });\n    return !!match;\n  }\n\n  /**\n   * @author Ahsan Ayaz\n   * @desc Compares the current device info with the desktop devices to check\n   * if the current device is a desktop device.\n   * @returns whether the current device is a desktop device\n   */\n  public isDesktop(userAgent = this.userAgent): boolean {\n    const desktopDevices = [Constants.DEVICES.PS4, Constants.DEVICES.CHROME_BOOK, Constants.DEVICES.UNKNOWN];\n    if (this.device === Constants.DEVICES.UNKNOWN) {\n      if (this.isMobile(userAgent) || this.isTablet(userAgent)) {\n        return false;\n      }\n    }\n    return desktopDevices.indexOf(this.device) > -1;\n  }\n}\n","/*\n * Public API Surface of ngx-device-detector\n */\n\nexport * from './lib/device-detector.constants';\nexport * from './lib/device-detector.service';\nexport * from './lib/retree';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","import { ArgumentOutOfRangeError } from '../util/ArgumentOutOfRangeError';\nimport { filter } from './filter';\nimport { throwIfEmpty } from './throwIfEmpty';\nimport { defaultIfEmpty } from './defaultIfEmpty';\nimport { take } from './take';\nexport function elementAt(index, defaultValue) {\n    if (index < 0) {\n        throw new ArgumentOutOfRangeError();\n    }\n    const hasDefaultValue = arguments.length >= 2;\n    return (source) => source.pipe(filter((v, i) => i === index), take(1), hasDefaultValue\n        ? defaultIfEmpty(defaultValue)\n        : throwIfEmpty(() => new ArgumentOutOfRangeError()));\n}\n//# sourceMappingURL=elementAt.js.map","const ObjectUnsubscribedErrorImpl = (() => {\n    function ObjectUnsubscribedErrorImpl() {\n        Error.call(this);\n        this.message = 'object unsubscribed';\n        this.name = 'ObjectUnsubscribedError';\n        return this;\n    }\n    ObjectUnsubscribedErrorImpl.prototype = Object.create(Error.prototype);\n    return ObjectUnsubscribedErrorImpl;\n})();\nexport const ObjectUnsubscribedError = ObjectUnsubscribedErrorImpl;\n//# sourceMappingURL=ObjectUnsubscribedError.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar skipWhile_1 = require(\"../../operator/skipWhile\");\nrxjs_1.Observable.prototype.skipWhile = skipWhile_1.skipWhile;\n//# sourceMappingURL=skipWhile.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar internal_compatibility_1 = require(\"rxjs/internal-compatibility\");\nvar operators_1 = require(\"rxjs/operators\");\n/* tslint:enable:max-line-length */\n/**\n * Buffers the source Observable values for a specific time period.\n *\n * <span class=\"informal\">Collects values from the past as an array, and emits\n * those arrays periodically in time.</span>\n *\n * <img src=\"./img/bufferTime.png\" width=\"100%\">\n *\n * Buffers values from the source for a specific time duration `bufferTimeSpan`.\n * Unless the optional argument `bufferCreationInterval` is given, it emits and\n * resets the buffer every `bufferTimeSpan` milliseconds. If\n * `bufferCreationInterval` is given, this operator opens the buffer every\n * `bufferCreationInterval` milliseconds and closes (emits and resets) the\n * buffer every `bufferTimeSpan` milliseconds. When the optional argument\n * `maxBufferSize` is specified, the buffer will be closed either after\n * `bufferTimeSpan` milliseconds or when it contains `maxBufferSize` elements.\n *\n * @example <caption>Every second, emit an array of the recent click events</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var buffered = clicks.bufferTime(1000);\n * buffered.subscribe(x => console.log(x));\n *\n * @example <caption>Every 5 seconds, emit the click events from the next 2 seconds</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var buffered = clicks.bufferTime(2000, 5000);\n * buffered.subscribe(x => console.log(x));\n *\n * @see {@link buffer}\n * @see {@link bufferCount}\n * @see {@link bufferToggle}\n * @see {@link bufferWhen}\n * @see {@link windowTime}\n *\n * @param {number} bufferTimeSpan The amount of time to fill each buffer array.\n * @param {number} [bufferCreationInterval] The interval at which to start new\n * buffers.\n * @param {number} [maxBufferSize] The maximum buffer size.\n * @param {Scheduler} [scheduler=asyncScheduler] The scheduler on which to schedule the\n * intervals that determine buffer boundaries.\n * @return {Observable<T[]>} An observable of arrays of buffered values.\n * @method bufferTime\n * @owner Observable\n */\nfunction bufferTime(bufferTimeSpan) {\n    var length = arguments.length;\n    var scheduler = rxjs_1.asyncScheduler;\n    if (internal_compatibility_1.isScheduler(arguments[arguments.length - 1])) {\n        scheduler = arguments[arguments.length - 1];\n        length--;\n    }\n    var bufferCreationInterval = null;\n    if (length >= 2) {\n        bufferCreationInterval = arguments[1];\n    }\n    var maxBufferSize = Number.POSITIVE_INFINITY;\n    if (length >= 3) {\n        maxBufferSize = arguments[2];\n    }\n    return operators_1.bufferTime(bufferTimeSpan, bufferCreationInterval, maxBufferSize, scheduler)(this);\n}\nexports.bufferTime = bufferTime;\n//# sourceMappingURL=bufferTime.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar publishBehavior_1 = require(\"../../operator/publishBehavior\");\nrxjs_1.Observable.prototype.publishBehavior = publishBehavior_1.publishBehavior;\n//# sourceMappingURL=publishBehavior.js.map","import { not } from '../util/not';\nimport { filter } from './filter';\nexport function partition(predicate, thisArg) {\n    return (source) => [\n        filter(predicate, thisArg)(source),\n        filter(not(predicate, thisArg))(source)\n    ];\n}\n//# sourceMappingURL=partition.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Returns an Observable that mirrors the source Observable with the exception of a `complete`. If the source\n * Observable calls `complete`, this method will emit to the Observable returned from `notifier`. If that Observable\n * calls `complete` or `error`, then this method will call `complete` or `error` on the child subscription. Otherwise\n * this method will resubscribe to the source Observable.\n *\n * <img src=\"./img/repeatWhen.png\" width=\"100%\">\n *\n * @param {function(notifications: Observable): Observable} notifier - Receives an Observable of notifications with\n * which a user can `complete` or `error`, aborting the repetition.\n * @return {Observable} The source Observable modified with repeat logic.\n * @method repeatWhen\n * @owner Observable\n */\nfunction repeatWhen(notifier) {\n    return operators_1.repeatWhen(notifier)(this);\n}\nexports.repeatWhen = repeatWhen;\n//# sourceMappingURL=repeatWhen.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {FocusableOption} from '@angular/cdk/a11y';\nimport {BooleanInput, coerceBooleanProperty, NumberInput} from '@angular/cdk/coercion';\nimport {BACKSPACE, DELETE, SPACE} from '@angular/cdk/keycodes';\nimport {Platform} from '@angular/cdk/platform';\nimport {DOCUMENT} from '@angular/common';\nimport {\n  Attribute,\n  ChangeDetectorRef,\n  ContentChild,\n  Directive,\n  ElementRef,\n  EventEmitter,\n  Inject,\n  InjectionToken,\n  Input,\n  NgZone,\n  OnDestroy,\n  Optional,\n  Output,\n} from '@angular/core';\nimport {\n  CanColor,\n  CanColorCtor,\n  CanDisableRipple,\n  CanDisableRippleCtor,\n  HasTabIndex,\n  HasTabIndexCtor,\n  MAT_RIPPLE_GLOBAL_OPTIONS,\n  mixinColor,\n  mixinDisableRipple,\n  mixinTabIndex,\n  RippleConfig,\n  RippleGlobalOptions,\n  RippleRenderer,\n  RippleTarget,\n} from '@angular/material/core';\nimport {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';\nimport {Subject} from 'rxjs';\nimport {take} from 'rxjs/operators';\n\n\n/** Represents an event fired on an individual `mat-chip`. */\nexport interface MatChipEvent {\n  /** The chip the event was fired on. */\n  chip: MatChip;\n}\n\n/** Event object emitted by MatChip when selected or deselected. */\nexport class MatChipSelectionChange {\n  constructor(\n    /** Reference to the chip that emitted the event. */\n    public source: MatChip,\n    /** Whether the chip that emitted the event is selected. */\n    public selected: boolean,\n    /** Whether the selection change was a result of a user interaction. */\n    public isUserInput = false) { }\n}\n\n/**\n * Injection token that can be used to reference instances of `MatChipRemove`. It serves as\n * alternative token to the actual `MatChipRemove` class which could cause unnecessary\n * retention of the class and its directive metadata.\n */\nexport const MAT_CHIP_REMOVE = new InjectionToken<MatChipRemove>('MatChipRemove');\n\n/**\n * Injection token that can be used to reference instances of `MatChipAvatar`. It serves as\n * alternative token to the actual `MatChipAvatar` class which could cause unnecessary\n * retention of the class and its directive metadata.\n */\nexport const MAT_CHIP_AVATAR = new InjectionToken<MatChipAvatar>('MatChipAvatar');\n\n/**\n * Injection token that can be used to reference instances of `MatChipTrailingIcon`. It serves as\n * alternative token to the actual `MatChipTrailingIcon` class which could cause unnecessary\n * retention of the class and its directive metadata.\n */\nexport const MAT_CHIP_TRAILING_ICON =\n    new InjectionToken<MatChipTrailingIcon>('MatChipTrailingIcon');\n\n// Boilerplate for applying mixins to MatChip.\n/** @docs-private */\nabstract class MatChipBase {\n  abstract disabled: boolean;\n  constructor(public _elementRef: ElementRef) {}\n}\n\nconst _MatChipMixinBase: CanColorCtor & CanDisableRippleCtor &\n    HasTabIndexCtor & typeof MatChipBase =\n      mixinTabIndex(mixinColor(mixinDisableRipple(MatChipBase), 'primary'), -1);\n\n/**\n * Dummy directive to add CSS class to chip avatar.\n * @docs-private\n */\n@Directive({\n  selector: 'mat-chip-avatar, [matChipAvatar]',\n  host: {'class': 'mat-chip-avatar'},\n  providers: [{provide: MAT_CHIP_AVATAR, useExisting: MatChipAvatar}]\n})\nexport class MatChipAvatar {}\n\n/**\n * Dummy directive to add CSS class to chip trailing icon.\n * @docs-private\n */\n@Directive({\n  selector: 'mat-chip-trailing-icon, [matChipTrailingIcon]',\n  host: {'class': 'mat-chip-trailing-icon'},\n  providers: [{provide: MAT_CHIP_TRAILING_ICON, useExisting: MatChipTrailingIcon}],\n})\nexport class MatChipTrailingIcon {}\n\n\n/**\n * Material design styled Chip component. Used inside the MatChipList component.\n */\n@Directive({\n  selector: `mat-basic-chip, [mat-basic-chip], mat-chip, [mat-chip]`,\n  inputs: ['color', 'disableRipple', 'tabIndex'],\n  exportAs: 'matChip',\n  host: {\n    'class': 'mat-chip mat-focus-indicator',\n    '[attr.tabindex]': 'disabled ? null : tabIndex',\n    'role': 'option',\n    '[class.mat-chip-selected]': 'selected',\n    '[class.mat-chip-with-avatar]': 'avatar',\n    '[class.mat-chip-with-trailing-icon]': 'trailingIcon || removeIcon',\n    '[class.mat-chip-disabled]': 'disabled',\n    '[class._mat-animation-noopable]': '_animationsDisabled',\n    '[attr.disabled]': 'disabled || null',\n    '[attr.aria-disabled]': 'disabled.toString()',\n    '[attr.aria-selected]': 'ariaSelected',\n    '(click)': '_handleClick($event)',\n    '(keydown)': '_handleKeydown($event)',\n    '(focus)': 'focus()',\n    '(blur)': '_blur()',\n  },\n})\nexport class MatChip extends _MatChipMixinBase implements FocusableOption, OnDestroy, CanColor,\n  CanDisableRipple, RippleTarget, HasTabIndex {\n\n  /** Reference to the RippleRenderer for the chip. */\n  private _chipRipple: RippleRenderer;\n\n  /**\n   * Reference to the element that acts as the chip's ripple target. This element is\n   * dynamically added as a child node of the chip. The chip itself cannot be used as the\n   * ripple target because it must be the host of the focus indicator.\n   */\n  private _chipRippleTarget: HTMLElement;\n\n  /**\n   * Ripple configuration for ripples that are launched on pointer down. The ripple config\n   * is set to the global ripple options since we don't have any configurable options for\n   * the chip ripples.\n   * @docs-private\n   */\n  rippleConfig: RippleConfig & RippleGlobalOptions;\n\n  /**\n   * Whether ripples are disabled on interaction\n   * @docs-private\n   */\n  get rippleDisabled(): boolean {\n    return this.disabled || this.disableRipple || !!this.rippleConfig.disabled;\n  }\n\n  /** Whether the chip has focus. */\n  _hasFocus: boolean = false;\n\n  /** Whether animations for the chip are enabled. */\n  _animationsDisabled: boolean;\n\n  /** Whether the chip list is selectable */\n  chipListSelectable: boolean = true;\n\n  /** Whether the chip list is in multi-selection mode. */\n  _chipListMultiple: boolean = false;\n\n  /** Whether the chip list as a whole is disabled. */\n  _chipListDisabled: boolean = false;\n\n  /** The chip avatar */\n  @ContentChild(MAT_CHIP_AVATAR) avatar: MatChipAvatar;\n\n  /** The chip's trailing icon. */\n  @ContentChild(MAT_CHIP_TRAILING_ICON) trailingIcon: MatChipTrailingIcon;\n\n  /** The chip's remove toggler. */\n  @ContentChild(MAT_CHIP_REMOVE) removeIcon: MatChipRemove;\n\n  /** Whether the chip is selected. */\n  @Input()\n  get selected(): boolean { return this._selected; }\n  set selected(value: boolean) {\n    const coercedValue = coerceBooleanProperty(value);\n\n    if (coercedValue !== this._selected) {\n      this._selected = coercedValue;\n      this._dispatchSelectionChange();\n    }\n  }\n  protected _selected: boolean = false;\n\n  /** The value of the chip. Defaults to the content inside `<mat-chip>` tags. */\n  @Input()\n  get value(): any {\n    return this._value !== undefined\n      ? this._value\n      : this._elementRef.nativeElement.textContent;\n  }\n  set value(value: any) { this._value = value; }\n  protected _value: any;\n\n  /**\n   * Whether or not the chip is selectable. When a chip is not selectable,\n   * changes to its selected state are always ignored. By default a chip is\n   * selectable, and it becomes non-selectable if its parent chip list is\n   * not selectable.\n   */\n  @Input()\n  get selectable(): boolean { return this._selectable && this.chipListSelectable; }\n  set selectable(value: boolean) {\n    this._selectable = coerceBooleanProperty(value);\n  }\n  protected _selectable: boolean = true;\n\n  /** Whether the chip is disabled. */\n  @Input()\n  get disabled(): boolean { return this._chipListDisabled || this._disabled; }\n  set disabled(value: boolean) {\n    this._disabled = coerceBooleanProperty(value);\n  }\n  protected _disabled: boolean = false;\n\n  /**\n   * Determines whether or not the chip displays the remove styling and emits (removed) events.\n   */\n  @Input()\n  get removable(): boolean { return this._removable; }\n  set removable(value: boolean) {\n    this._removable = coerceBooleanProperty(value);\n  }\n  protected _removable: boolean = true;\n\n  /** Emits when the chip is focused. */\n  readonly _onFocus = new Subject<MatChipEvent>();\n\n  /** Emits when the chip is blured. */\n  readonly _onBlur = new Subject<MatChipEvent>();\n\n  /** Emitted when the chip is selected or deselected. */\n  @Output() readonly selectionChange: EventEmitter<MatChipSelectionChange> =\n      new EventEmitter<MatChipSelectionChange>();\n\n  /** Emitted when the chip is destroyed. */\n  @Output() readonly destroyed: EventEmitter<MatChipEvent> = new EventEmitter<MatChipEvent>();\n\n  /** Emitted when a chip is to be removed. */\n  @Output() readonly removed: EventEmitter<MatChipEvent> = new EventEmitter<MatChipEvent>();\n\n  /** The ARIA selected applied to the chip. */\n  get ariaSelected(): string | null {\n    // Remove the `aria-selected` when the chip is deselected in single-selection mode, because\n    // it adds noise to NVDA users where \"not selected\" will be read out for each chip.\n    return this.selectable && (this._chipListMultiple || this.selected) ?\n        this.selected.toString() : null;\n  }\n\n  constructor(public _elementRef: ElementRef<HTMLElement>,\n              private _ngZone: NgZone,\n              platform: Platform,\n              @Optional() @Inject(MAT_RIPPLE_GLOBAL_OPTIONS)\n              globalRippleOptions: RippleGlobalOptions | null,\n              // @breaking-change 8.0.0 `animationMode` parameter to become required.\n              @Optional() @Inject(ANIMATION_MODULE_TYPE) animationMode?: string,\n              // @breaking-change 9.0.0 `_changeDetectorRef` parameter to become required.\n              private _changeDetectorRef?: ChangeDetectorRef,\n              @Attribute('tabindex') tabIndex?: string,\n              // @breaking-change 11.0.0 `_document` parameter to become required.\n              @Optional() @Inject(DOCUMENT) _document?: any) {\n    super(_elementRef);\n\n    this._addHostClassName();\n\n    // Dynamically create the ripple target, append it within the chip, and use it as the\n    // chip's ripple target. Adding the class '.mat-chip-ripple' ensures that it will have\n    // the proper styles.\n    this._chipRippleTarget = (_document || document).createElement('div');\n    this._chipRippleTarget.classList.add('mat-chip-ripple');\n    this._elementRef.nativeElement.appendChild(this._chipRippleTarget);\n    this._chipRipple = new RippleRenderer(this, _ngZone, this._chipRippleTarget, platform);\n    this._chipRipple.setupTriggerEvents(_elementRef);\n\n    this.rippleConfig = globalRippleOptions || {};\n    this._animationsDisabled = animationMode === 'NoopAnimations';\n    this.tabIndex = tabIndex != null ? (parseInt(tabIndex) || -1) : -1;\n  }\n\n  _addHostClassName() {\n    const basicChipAttrName = 'mat-basic-chip';\n    const element = this._elementRef.nativeElement as HTMLElement;\n\n    if (element.hasAttribute(basicChipAttrName) ||\n        element.tagName.toLowerCase() === basicChipAttrName) {\n      element.classList.add(basicChipAttrName);\n      return;\n    } else {\n      element.classList.add('mat-standard-chip');\n    }\n  }\n\n  ngOnDestroy() {\n    this.destroyed.emit({chip: this});\n    this._chipRipple._removeTriggerEvents();\n  }\n\n  /** Selects the chip. */\n  select(): void {\n    if (!this._selected) {\n      this._selected = true;\n      this._dispatchSelectionChange();\n      this._markForCheck();\n    }\n  }\n\n  /** Deselects the chip. */\n  deselect(): void {\n    if (this._selected) {\n      this._selected = false;\n      this._dispatchSelectionChange();\n      this._markForCheck();\n    }\n  }\n\n  /** Select this chip and emit selected event */\n  selectViaInteraction(): void {\n    if (!this._selected) {\n      this._selected = true;\n      this._dispatchSelectionChange(true);\n      this._markForCheck();\n    }\n  }\n\n  /** Toggles the current selected state of this chip. */\n  toggleSelected(isUserInput: boolean = false): boolean {\n    this._selected = !this.selected;\n    this._dispatchSelectionChange(isUserInput);\n    this._markForCheck();\n    return this.selected;\n  }\n\n  /** Allows for programmatic focusing of the chip. */\n  focus(): void {\n    if (!this._hasFocus) {\n      this._elementRef.nativeElement.focus();\n      this._onFocus.next({chip: this});\n    }\n    this._hasFocus = true;\n  }\n\n  /**\n   * Allows for programmatic removal of the chip. Called by the MatChipList when the DELETE or\n   * BACKSPACE keys are pressed.\n   *\n   * Informs any listeners of the removal request. Does not remove the chip from the DOM.\n   */\n  remove(): void {\n    if (this.removable) {\n      this.removed.emit({chip: this});\n    }\n  }\n\n  /** Handles click events on the chip. */\n  _handleClick(event: Event) {\n    if (this.disabled) {\n      event.preventDefault();\n    } else {\n      event.stopPropagation();\n    }\n  }\n\n  /** Handle custom key presses. */\n  _handleKeydown(event: KeyboardEvent): void {\n    if (this.disabled) {\n      return;\n    }\n\n    switch (event.keyCode) {\n      case DELETE:\n      case BACKSPACE:\n        // If we are removable, remove the focused chip\n        this.remove();\n        // Always prevent so page navigation does not occur\n        event.preventDefault();\n        break;\n      case SPACE:\n        // If we are selectable, toggle the focused chip\n        if (this.selectable) {\n          this.toggleSelected(true);\n        }\n\n        // Always prevent space from scrolling the page since the list has focus\n        event.preventDefault();\n        break;\n    }\n  }\n\n  _blur(): void {\n    // When animations are enabled, Angular may end up removing the chip from the DOM a little\n    // earlier than usual, causing it to be blurred and throwing off the logic in the chip list\n    // that moves focus not the next item. To work around the issue, we defer marking the chip\n    // as not focused until the next time the zone stabilizes.\n    this._ngZone.onStable\n      .pipe(take(1))\n      .subscribe(() => {\n        this._ngZone.run(() => {\n          this._hasFocus = false;\n          this._onBlur.next({chip: this});\n        });\n      });\n  }\n\n  private _dispatchSelectionChange(isUserInput = false) {\n    this.selectionChange.emit({\n      source: this,\n      isUserInput,\n      selected: this._selected\n    });\n  }\n\n  private _markForCheck() {\n    // @breaking-change 9.0.0 Remove this method once the _changeDetectorRef is a required param.\n    if (this._changeDetectorRef) {\n      this._changeDetectorRef.markForCheck();\n    }\n  }\n\n  static ngAcceptInputType_selected: BooleanInput;\n  static ngAcceptInputType_selectable: BooleanInput;\n  static ngAcceptInputType_removable: BooleanInput;\n  static ngAcceptInputType_disabled: BooleanInput;\n  static ngAcceptInputType_disableRipple: BooleanInput;\n  static ngAcceptInputType_tabIndex: NumberInput;\n}\n\n/**\n * Applies proper (click) support and adds styling for use with the Material Design \"cancel\" icon\n * available at https://material.io/icons/#ic_cancel.\n *\n * Example:\n *\n *     `<mat-chip>\n *       <mat-icon matChipRemove>cancel</mat-icon>\n *     </mat-chip>`\n *\n * You *may* use a custom icon, but you may need to override the `mat-chip-remove` positioning\n * styles to properly center the icon within the chip.\n */\n@Directive({\n  selector: '[matChipRemove]',\n  host: {\n    'class': 'mat-chip-remove mat-chip-trailing-icon',\n    '(click)': '_handleClick($event)',\n  },\n  providers: [{provide: MAT_CHIP_REMOVE, useExisting: MatChipRemove}],\n})\nexport class MatChipRemove {\n  constructor(\n    protected _parentChip: MatChip,\n    // @breaking-change 11.0.0 `elementRef` parameter to be made required.\n    elementRef?: ElementRef<HTMLElement>) {\n\n      // @breaking-change 11.0.0 Remove null check for `elementRef`.\n    if (elementRef && elementRef.nativeElement.nodeName === 'BUTTON') {\n      elementRef.nativeElement.setAttribute('type', 'button');\n    }\n   }\n\n  /** Calls the parent chip's public `remove()` method if applicable. */\n  _handleClick(event: Event): void {\n    const parentChip = this._parentChip;\n\n    if (parentChip.removable && !parentChip.disabled) {\n      parentChip.remove();\n    }\n\n    // We need to stop event propagation because otherwise the event will bubble up to the\n    // form field and cause the `onContainerClick` method to be invoked. This method would then\n    // reset the focused chip that has been focused after chip removal. Usually the parent\n    // the parent click listener of the `MatChip` would prevent propagation, but it can happen\n    // that the chip is being removed before the event bubbles up.\n    event.stopPropagation();\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {InjectionToken} from '@angular/core';\n\n/** Default options, for the chips module, that can be overridden. */\nexport interface MatChipsDefaultOptions {\n  /** The list of key codes that will trigger a chipEnd event. */\n  separatorKeyCodes: readonly number[] | ReadonlySet<number>;\n}\n\n/** Injection token to be used to override the default options for the chips module. */\nexport const MAT_CHIPS_DEFAULT_OPTIONS =\n    new InjectionToken<MatChipsDefaultOptions>('mat-chips-default-options');\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {FocusKeyManager} from '@angular/cdk/a11y';\nimport {Directionality} from '@angular/cdk/bidi';\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {SelectionModel} from '@angular/cdk/collections';\nimport {BACKSPACE} from '@angular/cdk/keycodes';\nimport {\n  AfterContentInit,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ContentChildren,\n  DoCheck,\n  ElementRef,\n  EventEmitter,\n  Input,\n  OnDestroy,\n  OnInit,\n  Optional,\n  Output,\n  QueryList,\n  Self,\n  ViewEncapsulation,\n} from '@angular/core';\nimport {ControlValueAccessor, FormGroupDirective, NgControl, NgForm} from '@angular/forms';\nimport {\n  CanUpdateErrorState,\n  CanUpdateErrorStateCtor,\n  ErrorStateMatcher,\n  mixinErrorState,\n} from '@angular/material/core';\nimport {MatFormFieldControl} from '@angular/material/form-field';\nimport {merge, Observable, Subject, Subscription} from 'rxjs';\nimport {startWith, takeUntil} from 'rxjs/operators';\nimport {MatChip, MatChipEvent, MatChipSelectionChange} from './chip';\nimport {MatChipTextControl} from './chip-text-control';\n\n\n// Boilerplate for applying mixins to MatChipList.\n/** @docs-private */\nclass MatChipListBase {\n  constructor(public _defaultErrorStateMatcher: ErrorStateMatcher,\n              public _parentForm: NgForm,\n              public _parentFormGroup: FormGroupDirective,\n              /** @docs-private */\n              public ngControl: NgControl) {}\n}\nconst _MatChipListMixinBase: CanUpdateErrorStateCtor & typeof MatChipListBase =\n    mixinErrorState(MatChipListBase);\n\n\n// Increasing integer for generating unique ids for chip-list components.\nlet nextUniqueId = 0;\n\n/** Change event object that is emitted when the chip list value has changed. */\nexport class MatChipListChange {\n  constructor(\n    /** Chip list that emitted the event. */\n    public source: MatChipList,\n    /** Value of the chip list when the event was emitted. */\n    public value: any) { }\n}\n\n\n/**\n * A material design chips component (named ChipList for its similarity to the List component).\n */\n@Component({\n  selector: 'mat-chip-list',\n  template: `<div class=\"mat-chip-list-wrapper\"><ng-content></ng-content></div>`,\n  exportAs: 'matChipList',\n  host: {\n    '[attr.tabindex]': 'disabled ? null : _tabIndex',\n    '[attr.aria-describedby]': '_ariaDescribedby || null',\n    '[attr.aria-required]': 'role ? required : null',\n    '[attr.aria-disabled]': 'disabled.toString()',\n    '[attr.aria-invalid]': 'errorState',\n    '[attr.aria-multiselectable]': 'multiple',\n    '[attr.role]': 'role',\n    '[class.mat-chip-list-disabled]': 'disabled',\n    '[class.mat-chip-list-invalid]': 'errorState',\n    '[class.mat-chip-list-required]': 'required',\n    '[attr.aria-orientation]': 'ariaOrientation',\n    'class': 'mat-chip-list',\n    '(focus)': 'focus()',\n    '(blur)': '_blur()',\n    '(keydown)': '_keydown($event)',\n    '[id]': '_uid',\n  },\n  providers: [{provide: MatFormFieldControl, useExisting: MatChipList}],\n  styleUrls: ['chips.css'],\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush\n})\nexport class MatChipList extends _MatChipListMixinBase implements MatFormFieldControl<any>,\n  ControlValueAccessor, AfterContentInit, DoCheck, OnInit, OnDestroy, CanUpdateErrorState {\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  readonly controlType: string = 'mat-chip-list';\n\n  /**\n   * When a chip is destroyed, we store the index of the destroyed chip until the chips\n   * query list notifies about the update. This is necessary because we cannot determine an\n   * appropriate chip that should receive focus until the array of chips updated completely.\n   */\n  private _lastDestroyedChipIndex: number | null = null;\n\n  /** Subject that emits when the component has been destroyed. */\n  private _destroyed = new Subject<void>();\n\n  /** Subscription to focus changes in the chips. */\n  private _chipFocusSubscription: Subscription | null;\n\n  /** Subscription to blur changes in the chips. */\n  private _chipBlurSubscription: Subscription | null;\n\n  /** Subscription to selection changes in chips. */\n  private _chipSelectionSubscription: Subscription | null;\n\n  /** Subscription to remove changes in chips. */\n  private _chipRemoveSubscription: Subscription | null;\n\n  /** The chip input to add more chips */\n  protected _chipInput: MatChipTextControl;\n\n  /** Uid of the chip list */\n  _uid: string = `mat-chip-list-${nextUniqueId++}`;\n\n  /** The aria-describedby attribute on the chip list for improved a11y. */\n  _ariaDescribedby: string;\n\n  /** Tab index for the chip list. */\n  _tabIndex = 0;\n\n  /**\n   * User defined tab index.\n   * When it is not null, use user defined tab index. Otherwise use _tabIndex\n   */\n  _userTabIndex: number | null = null;\n\n  /** The FocusKeyManager which handles focus. */\n  _keyManager: FocusKeyManager<MatChip>;\n\n  /** Function when touched */\n  _onTouched = () => {};\n\n  /** Function when changed */\n  _onChange: (value: any) => void = () => {};\n\n  _selectionModel: SelectionModel<MatChip>;\n\n  /** The array of selected chips inside chip list. */\n  get selected(): MatChip[] | MatChip {\n    return this.multiple ? this._selectionModel.selected : this._selectionModel.selected[0];\n  }\n\n  /** The ARIA role applied to the chip list. */\n  get role(): string | null { return this.empty ? null : 'listbox'; }\n\n  /** An object used to control when error messages are shown. */\n  @Input() errorStateMatcher: ErrorStateMatcher;\n\n  /** Whether the user should be allowed to select multiple chips. */\n  @Input()\n  get multiple(): boolean { return this._multiple; }\n  set multiple(value: boolean) {\n    this._multiple = coerceBooleanProperty(value);\n    this._syncChipsState();\n  }\n  private _multiple: boolean = false;\n\n  /**\n   * A function to compare the option values with the selected values. The first argument\n   * is a value from an option. The second is a value from the selection. A boolean\n   * should be returned.\n   */\n  @Input()\n  get compareWith(): (o1: any, o2: any) => boolean { return this._compareWith; }\n  set compareWith(fn: (o1: any, o2: any) => boolean) {\n    this._compareWith = fn;\n    if (this._selectionModel) {\n      // A different comparator means the selection could change.\n      this._initializeSelection();\n    }\n  }\n  private _compareWith = (o1: any, o2: any) => o1 === o2;\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  @Input()\n  get value(): any { return this._value; }\n  set value(value: any) {\n    this.writeValue(value);\n    this._value = value;\n  }\n  protected _value: any;\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  get id(): string {\n    return this._chipInput ? this._chipInput.id : this._uid;\n  }\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  @Input()\n  get required(): boolean { return this._required; }\n  set required(value: boolean) {\n    this._required = coerceBooleanProperty(value);\n    this.stateChanges.next();\n  }\n  protected _required: boolean = false;\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  @Input()\n  get placeholder(): string {\n    return this._chipInput ? this._chipInput.placeholder : this._placeholder;\n  }\n  set placeholder(value: string) {\n    this._placeholder = value;\n    this.stateChanges.next();\n  }\n  protected _placeholder: string;\n\n  /** Whether any chips or the matChipInput inside of this chip-list has focus. */\n  get focused(): boolean {\n    return (this._chipInput && this._chipInput.focused) || this._hasFocusedChip();\n  }\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  get empty(): boolean {\n    return (!this._chipInput || this._chipInput.empty) && (!this.chips || this.chips.length === 0);\n  }\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  get shouldLabelFloat(): boolean { return !this.empty || this.focused; }\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  @Input()\n  get disabled(): boolean { return this.ngControl ? !!this.ngControl.disabled : this._disabled; }\n  set disabled(value: boolean) {\n    this._disabled = coerceBooleanProperty(value);\n    this._syncChipsState();\n  }\n  protected _disabled: boolean = false;\n\n  /** Orientation of the chip list. */\n  @Input('aria-orientation') ariaOrientation: 'horizontal' | 'vertical' = 'horizontal';\n\n  /**\n   * Whether or not this chip list is selectable. When a chip list is not selectable,\n   * the selected states for all the chips inside the chip list are always ignored.\n   */\n  @Input()\n  get selectable(): boolean { return this._selectable; }\n  set selectable(value: boolean) {\n    this._selectable = coerceBooleanProperty(value);\n\n    if (this.chips) {\n      this.chips.forEach(chip => chip.chipListSelectable = this._selectable);\n    }\n  }\n  protected _selectable: boolean = true;\n\n  @Input()\n  set tabIndex(value: number) {\n    this._userTabIndex = value;\n    this._tabIndex = value;\n  }\n\n  /** Combined stream of all of the child chips' selection change events. */\n  get chipSelectionChanges(): Observable<MatChipSelectionChange> {\n    return merge(...this.chips.map(chip => chip.selectionChange));\n  }\n\n  /** Combined stream of all of the child chips' focus change events. */\n  get chipFocusChanges(): Observable<MatChipEvent> {\n    return merge(...this.chips.map(chip => chip._onFocus));\n  }\n\n  /** Combined stream of all of the child chips' blur change events. */\n  get chipBlurChanges(): Observable<MatChipEvent> {\n    return merge(...this.chips.map(chip => chip._onBlur));\n  }\n\n  /** Combined stream of all of the child chips' remove change events. */\n  get chipRemoveChanges(): Observable<MatChipEvent> {\n    return merge(...this.chips.map(chip => chip.destroyed));\n  }\n\n  /** Event emitted when the selected chip list value has been changed by the user. */\n  @Output() readonly change: EventEmitter<MatChipListChange> =\n      new EventEmitter<MatChipListChange>();\n\n  /**\n   * Event that emits whenever the raw value of the chip-list changes. This is here primarily\n   * to facilitate the two-way binding for the `value` input.\n   * @docs-private\n   */\n  @Output() readonly valueChange: EventEmitter<any> = new EventEmitter<any>();\n\n  /** The chip components contained within this chip list. */\n  @ContentChildren(MatChip, {\n    // We need to use `descendants: true`, because Ivy will no longer match\n    // indirect descendants if it's left as false.\n    descendants: true\n  }) chips: QueryList<MatChip>;\n\n  constructor(protected _elementRef: ElementRef<HTMLElement>,\n              private _changeDetectorRef: ChangeDetectorRef,\n              @Optional() private _dir: Directionality,\n              @Optional() _parentForm: NgForm,\n              @Optional() _parentFormGroup: FormGroupDirective,\n              _defaultErrorStateMatcher: ErrorStateMatcher,\n              /** @docs-private */\n              @Optional() @Self() public ngControl: NgControl) {\n    super(_defaultErrorStateMatcher, _parentForm, _parentFormGroup, ngControl);\n    if (this.ngControl) {\n      this.ngControl.valueAccessor = this;\n    }\n  }\n\n  ngAfterContentInit() {\n    this._keyManager = new FocusKeyManager<MatChip>(this.chips)\n      .withWrap()\n      .withVerticalOrientation()\n      .withHomeAndEnd()\n      .withHorizontalOrientation(this._dir ? this._dir.value : 'ltr');\n\n    if (this._dir) {\n      this._dir.change\n        .pipe(takeUntil(this._destroyed))\n        .subscribe(dir => this._keyManager.withHorizontalOrientation(dir));\n    }\n\n    this._keyManager.tabOut.pipe(takeUntil(this._destroyed)).subscribe(() => {\n      this._allowFocusEscape();\n    });\n\n    // When the list changes, re-subscribe\n    this.chips.changes.pipe(startWith(null), takeUntil(this._destroyed)).subscribe(() => {\n      if (this.disabled) {\n        // Since this happens after the content has been\n        // checked, we need to defer it to the next tick.\n        Promise.resolve().then(() => {\n          this._syncChipsState();\n        });\n      }\n\n      this._resetChips();\n\n      // Reset chips selected/deselected status\n      this._initializeSelection();\n\n      // Check to see if we need to update our tab index\n      this._updateTabIndex();\n\n      // Check to see if we have a destroyed chip and need to refocus\n      this._updateFocusForDestroyedChips();\n\n      this.stateChanges.next();\n    });\n  }\n\n  ngOnInit() {\n    this._selectionModel = new SelectionModel<MatChip>(this.multiple, undefined, false);\n    this.stateChanges.next();\n  }\n\n  ngDoCheck() {\n    if (this.ngControl) {\n      // We need to re-evaluate this on every change detection cycle, because there are some\n      // error triggers that we can't subscribe to (e.g. parent form submissions). This means\n      // that whatever logic is in here has to be super lean or we risk destroying the performance.\n      this.updateErrorState();\n\n      if (this.ngControl.disabled !== this._disabled) {\n        this.disabled = !!this.ngControl.disabled;\n      }\n    }\n  }\n\n  ngOnDestroy() {\n    this._destroyed.next();\n    this._destroyed.complete();\n    this.stateChanges.complete();\n\n    this._dropSubscriptions();\n  }\n\n\n  /** Associates an HTML input element with this chip list. */\n  registerInput(inputElement: MatChipTextControl): void {\n    this._chipInput = inputElement;\n\n    // We use this attribute to match the chip list to its input in test harnesses.\n    // Set the attribute directly here to avoid \"changed after checked\" errors.\n    this._elementRef.nativeElement.setAttribute('data-mat-chip-input', inputElement.id);\n  }\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  setDescribedByIds(ids: string[]) { this._ariaDescribedby = ids.join(' '); }\n\n  // Implemented as part of ControlValueAccessor.\n  writeValue(value: any): void {\n    if (this.chips) {\n      this._setSelectionByValue(value, false);\n    }\n  }\n\n  // Implemented as part of ControlValueAccessor.\n  registerOnChange(fn: (value: any) => void): void {\n    this._onChange = fn;\n  }\n\n  // Implemented as part of ControlValueAccessor.\n  registerOnTouched(fn: () => void): void {\n    this._onTouched = fn;\n  }\n\n  // Implemented as part of ControlValueAccessor.\n  setDisabledState(isDisabled: boolean): void {\n    this.disabled = isDisabled;\n    this.stateChanges.next();\n  }\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  onContainerClick(event: MouseEvent) {\n    if (!this._originatesFromChip(event)) {\n      this.focus();\n    }\n  }\n\n  /**\n   * Focuses the first non-disabled chip in this chip list, or the associated input when there\n   * are no eligible chips.\n   */\n  focus(options?: FocusOptions): void {\n    if (this.disabled) {\n      return;\n    }\n\n    // TODO: ARIA says this should focus the first `selected` chip if any are selected.\n    // Focus on first element if there's no chipInput inside chip-list\n    if (this._chipInput && this._chipInput.focused) {\n      // do nothing\n    } else if (this.chips.length > 0) {\n      this._keyManager.setFirstItemActive();\n      this.stateChanges.next();\n    } else {\n      this._focusInput(options);\n      this.stateChanges.next();\n    }\n  }\n\n  /** Attempt to focus an input if we have one. */\n  _focusInput(options?: FocusOptions) {\n    if (this._chipInput) {\n      this._chipInput.focus(options);\n    }\n  }\n\n  /**\n   * Pass events to the keyboard manager. Available here for tests.\n   */\n  _keydown(event: KeyboardEvent) {\n    const target = event.target as HTMLElement;\n\n    // If they are on an empty input and hit backspace, focus the last chip\n    if (event.keyCode === BACKSPACE && this._isInputEmpty(target)) {\n      this._keyManager.setLastItemActive();\n      event.preventDefault();\n    } else if (target && target.classList.contains('mat-chip')) {\n      this._keyManager.onKeydown(event);\n      this.stateChanges.next();\n    }\n  }\n\n\n  /**\n   * Check the tab index as you should not be allowed to focus an empty list.\n   */\n  protected _updateTabIndex(): void {\n    // If we have 0 chips, we should not allow keyboard focus\n    this._tabIndex = this._userTabIndex || (this.chips.length === 0 ? -1 : 0);\n  }\n\n  /**\n   * If the amount of chips changed, we need to update the\n   * key manager state and focus the next closest chip.\n   */\n  protected _updateFocusForDestroyedChips() {\n    // Move focus to the closest chip. If no other chips remain, focus the chip-list itself.\n    if (this._lastDestroyedChipIndex != null) {\n      if (this.chips.length) {\n        const newChipIndex = Math.min(this._lastDestroyedChipIndex, this.chips.length - 1);\n        this._keyManager.setActiveItem(newChipIndex);\n      } else {\n        this.focus();\n      }\n    }\n\n    this._lastDestroyedChipIndex = null;\n  }\n\n  /**\n   * Utility to ensure all indexes are valid.\n   *\n   * @param index The index to be checked.\n   * @returns True if the index is valid for our list of chips.\n   */\n  private _isValidIndex(index: number): boolean {\n    return index >= 0 && index < this.chips.length;\n  }\n\n  private _isInputEmpty(element: HTMLElement): boolean {\n    if (element && element.nodeName.toLowerCase() === 'input') {\n      let input = element as HTMLInputElement;\n      return !input.value;\n    }\n\n    return false;\n  }\n\n  _setSelectionByValue(value: any, isUserInput: boolean = true) {\n    this._clearSelection();\n    this.chips.forEach(chip => chip.deselect());\n\n    if (Array.isArray(value)) {\n      value.forEach(currentValue => this._selectValue(currentValue, isUserInput));\n      this._sortValues();\n    } else {\n      const correspondingChip = this._selectValue(value, isUserInput);\n\n      // Shift focus to the active item. Note that we shouldn't do this in multiple\n      // mode, because we don't know what chip the user interacted with last.\n      if (correspondingChip) {\n        if (isUserInput) {\n          this._keyManager.setActiveItem(correspondingChip);\n        }\n      }\n    }\n  }\n\n  /**\n   * Finds and selects the chip based on its value.\n   * @returns Chip that has the corresponding value.\n   */\n  private _selectValue(value: any, isUserInput: boolean = true): MatChip | undefined {\n\n    const correspondingChip = this.chips.find(chip => {\n      return chip.value != null && this._compareWith(chip.value,  value);\n    });\n\n    if (correspondingChip) {\n      isUserInput ? correspondingChip.selectViaInteraction() : correspondingChip.select();\n      this._selectionModel.select(correspondingChip);\n    }\n\n    return correspondingChip;\n  }\n\n  private _initializeSelection(): void {\n    // Defer setting the value in order to avoid the \"Expression\n    // has changed after it was checked\" errors from Angular.\n    Promise.resolve().then(() => {\n      if (this.ngControl || this._value) {\n        this._setSelectionByValue(this.ngControl ? this.ngControl.value : this._value, false);\n        this.stateChanges.next();\n      }\n    });\n  }\n\n  /**\n   * Deselects every chip in the list.\n   * @param skip Chip that should not be deselected.\n   */\n  private _clearSelection(skip?: MatChip): void {\n    this._selectionModel.clear();\n    this.chips.forEach(chip => {\n      if (chip !== skip) {\n        chip.deselect();\n      }\n    });\n    this.stateChanges.next();\n  }\n\n  /**\n   * Sorts the model values, ensuring that they keep the same\n   * order that they have in the panel.\n   */\n  private _sortValues(): void {\n    if (this._multiple) {\n      this._selectionModel.clear();\n\n      this.chips.forEach(chip => {\n        if (chip.selected) {\n          this._selectionModel.select(chip);\n        }\n      });\n      this.stateChanges.next();\n    }\n  }\n\n  /** Emits change event to set the model value. */\n  private _propagateChanges(fallbackValue?: any): void {\n    let valueToEmit: any = null;\n\n    if (Array.isArray(this.selected)) {\n      valueToEmit = this.selected.map(chip => chip.value);\n    } else {\n      valueToEmit = this.selected ? this.selected.value : fallbackValue;\n    }\n    this._value = valueToEmit;\n    this.change.emit(new MatChipListChange(this, valueToEmit));\n    this.valueChange.emit(valueToEmit);\n    this._onChange(valueToEmit);\n    this._changeDetectorRef.markForCheck();\n  }\n\n  /** When blurred, mark the field as touched when focus moved outside the chip list. */\n  _blur() {\n    if (!this._hasFocusedChip()) {\n      this._keyManager.setActiveItem(-1);\n    }\n\n    if (!this.disabled) {\n      if (this._chipInput) {\n        // If there's a chip input, we should check whether the focus moved to chip input.\n        // If the focus is not moved to chip input, mark the field as touched. If the focus moved\n        // to chip input, do nothing.\n        // Timeout is needed to wait for the focus() event trigger on chip input.\n        setTimeout(() => {\n          if (!this.focused) {\n            this._markAsTouched();\n          }\n        });\n      } else {\n        // If there's no chip input, then mark the field as touched.\n        this._markAsTouched();\n      }\n    }\n  }\n\n  /** Mark the field as touched */\n  _markAsTouched() {\n    this._onTouched();\n    this._changeDetectorRef.markForCheck();\n    this.stateChanges.next();\n  }\n\n  /**\n   * Removes the `tabindex` from the chip list and resets it back afterwards, allowing the\n   * user to tab out of it. This prevents the list from capturing focus and redirecting\n   * it back to the first chip, creating a focus trap, if it user tries to tab away.\n   */\n  _allowFocusEscape() {\n    if (this._tabIndex !== -1) {\n      this._tabIndex = -1;\n\n      setTimeout(() => {\n        this._tabIndex = this._userTabIndex || 0;\n        this._changeDetectorRef.markForCheck();\n      });\n    }\n  }\n\n  private _resetChips() {\n    this._dropSubscriptions();\n    this._listenToChipsFocus();\n    this._listenToChipsSelection();\n    this._listenToChipsRemoved();\n  }\n\n  private _dropSubscriptions() {\n    if (this._chipFocusSubscription) {\n      this._chipFocusSubscription.unsubscribe();\n      this._chipFocusSubscription = null;\n    }\n\n    if (this._chipBlurSubscription) {\n      this._chipBlurSubscription.unsubscribe();\n      this._chipBlurSubscription = null;\n    }\n\n    if (this._chipSelectionSubscription) {\n      this._chipSelectionSubscription.unsubscribe();\n      this._chipSelectionSubscription = null;\n    }\n\n    if (this._chipRemoveSubscription) {\n      this._chipRemoveSubscription.unsubscribe();\n      this._chipRemoveSubscription = null;\n    }\n  }\n\n  /** Listens to user-generated selection events on each chip. */\n  private _listenToChipsSelection(): void {\n    this._chipSelectionSubscription = this.chipSelectionChanges.subscribe(event => {\n      event.source.selected\n        ? this._selectionModel.select(event.source)\n        : this._selectionModel.deselect(event.source);\n\n      // For single selection chip list, make sure the deselected value is unselected.\n      if (!this.multiple) {\n        this.chips.forEach(chip => {\n          if (!this._selectionModel.isSelected(chip) && chip.selected) {\n            chip.deselect();\n          }\n        });\n      }\n\n      if (event.isUserInput) {\n        this._propagateChanges();\n      }\n    });\n  }\n\n  /** Listens to user-generated selection events on each chip. */\n  private _listenToChipsFocus(): void {\n    this._chipFocusSubscription = this.chipFocusChanges.subscribe(event => {\n      let chipIndex: number = this.chips.toArray().indexOf(event.chip);\n\n      if (this._isValidIndex(chipIndex)) {\n        this._keyManager.updateActiveItem(chipIndex);\n      }\n      this.stateChanges.next();\n    });\n\n    this._chipBlurSubscription = this.chipBlurChanges.subscribe(() => {\n      this._blur();\n      this.stateChanges.next();\n    });\n  }\n\n  private _listenToChipsRemoved(): void {\n    this._chipRemoveSubscription = this.chipRemoveChanges.subscribe(event => {\n      const chip = event.chip;\n      const chipIndex = this.chips.toArray().indexOf(event.chip);\n\n      // In case the chip that will be removed is currently focused, we temporarily store\n      // the index in order to be able to determine an appropriate sibling chip that will\n      // receive focus.\n      if (this._isValidIndex(chipIndex) && chip._hasFocus) {\n        this._lastDestroyedChipIndex = chipIndex;\n      }\n    });\n  }\n\n  /** Checks whether an event comes from inside a chip element. */\n  private _originatesFromChip(event: Event): boolean {\n    let currentElement = event.target as HTMLElement | null;\n\n    while (currentElement && currentElement !== this._elementRef.nativeElement) {\n      if (currentElement.classList.contains('mat-chip')) {\n        return true;\n      }\n\n      currentElement = currentElement.parentElement;\n    }\n\n    return false;\n  }\n\n  /** Checks whether any of the chips is focused. */\n  private _hasFocusedChip() {\n    return this.chips && this.chips.some(chip => chip._hasFocus);\n  }\n\n  /** Syncs the list's state with the individual chips. */\n  private _syncChipsState() {\n    if (this.chips) {\n      this.chips.forEach(chip => {\n        chip._chipListDisabled = this._disabled;\n        chip._chipListMultiple = this.multiple;\n      });\n    }\n  }\n\n  static ngAcceptInputType_multiple: BooleanInput;\n  static ngAcceptInputType_required: BooleanInput;\n  static ngAcceptInputType_disabled: BooleanInput;\n  static ngAcceptInputType_selectable: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {hasModifierKey, TAB} from '@angular/cdk/keycodes';\nimport {Directive, ElementRef, EventEmitter, Inject, Input, OnChanges, Output} from '@angular/core';\nimport {MatChipsDefaultOptions, MAT_CHIPS_DEFAULT_OPTIONS} from './chip-default-options';\nimport {MatChipList} from './chip-list';\nimport {MatChipTextControl} from './chip-text-control';\n\n\n/** Represents an input event on a `matChipInput`. */\nexport interface MatChipInputEvent {\n  /** The native `<input>` element that the event is being fired for. */\n  input: HTMLInputElement;\n\n  /** The value of the input. */\n  value: string;\n}\n\n// Increasing integer for generating unique ids.\nlet nextUniqueId = 0;\n\n/**\n * Directive that adds chip-specific behaviors to an input element inside `<mat-form-field>`.\n * May be placed inside or outside of an `<mat-chip-list>`.\n */\n@Directive({\n  selector: 'input[matChipInputFor]',\n  exportAs: 'matChipInput, matChipInputFor',\n  host: {\n    'class': 'mat-chip-input mat-input-element',\n    '(keydown)': '_keydown($event)',\n    '(blur)': '_blur()',\n    '(focus)': '_focus()',\n    '(input)': '_onInput()',\n    '[id]': 'id',\n    '[attr.disabled]': 'disabled || null',\n    '[attr.placeholder]': 'placeholder || null',\n    '[attr.aria-invalid]': '_chipList && _chipList.ngControl ? _chipList.ngControl.invalid : null',\n    '[attr.aria-required]': '_chipList && _chipList.required || null',\n  }\n})\nexport class MatChipInput implements MatChipTextControl, OnChanges {\n  /** Whether the control is focused. */\n  focused: boolean = false;\n  _chipList: MatChipList;\n\n  /** Register input for chip list */\n  @Input('matChipInputFor')\n  set chipList(value: MatChipList) {\n    if (value) {\n      this._chipList = value;\n      this._chipList.registerInput(this);\n    }\n  }\n\n  /**\n   * Whether or not the chipEnd event will be emitted when the input is blurred.\n   */\n  @Input('matChipInputAddOnBlur')\n  get addOnBlur(): boolean { return this._addOnBlur; }\n  set addOnBlur(value: boolean) { this._addOnBlur = coerceBooleanProperty(value); }\n  _addOnBlur: boolean = false;\n\n  /**\n   * The list of key codes that will trigger a chipEnd event.\n   *\n   * Defaults to `[ENTER]`.\n   */\n  @Input('matChipInputSeparatorKeyCodes')\n  separatorKeyCodes: readonly number[] | ReadonlySet<number> =\n      this._defaultOptions.separatorKeyCodes;\n\n  /** Emitted when a chip is to be added. */\n  @Output('matChipInputTokenEnd')\n  chipEnd: EventEmitter<MatChipInputEvent> = new EventEmitter<MatChipInputEvent>();\n\n  /** The input's placeholder text. */\n  @Input() placeholder: string = '';\n\n  /** Unique id for the input. */\n  @Input() id: string = `mat-chip-list-input-${nextUniqueId++}`;\n\n  /** Whether the input is disabled. */\n  @Input()\n  get disabled(): boolean { return this._disabled || (this._chipList && this._chipList.disabled); }\n  set disabled(value: boolean) { this._disabled = coerceBooleanProperty(value); }\n  private _disabled: boolean = false;\n\n  /** Whether the input is empty. */\n  get empty(): boolean { return !this._inputElement.value; }\n\n  /** The native input element to which this directive is attached. */\n  protected _inputElement: HTMLInputElement;\n\n  constructor(\n    protected _elementRef: ElementRef<HTMLInputElement>,\n    @Inject(MAT_CHIPS_DEFAULT_OPTIONS) private _defaultOptions: MatChipsDefaultOptions) {\n    this._inputElement = this._elementRef.nativeElement as HTMLInputElement;\n  }\n\n  ngOnChanges() {\n    this._chipList.stateChanges.next();\n  }\n\n  /** Utility method to make host definition/tests more clear. */\n  _keydown(event?: KeyboardEvent) {\n    // Allow the user's focus to escape when they're tabbing forward. Note that we don't\n    // want to do this when going backwards, because focus should go back to the first chip.\n    if (event && event.keyCode === TAB && !hasModifierKey(event, 'shiftKey')) {\n      this._chipList._allowFocusEscape();\n    }\n\n    this._emitChipEnd(event);\n  }\n\n  /** Checks to see if the blur should emit the (chipEnd) event. */\n  _blur() {\n    if (this.addOnBlur) {\n      this._emitChipEnd();\n    }\n    this.focused = false;\n    // Blur the chip list if it is not focused\n    if (!this._chipList.focused) {\n      this._chipList._blur();\n    }\n    this._chipList.stateChanges.next();\n  }\n\n  _focus() {\n    this.focused = true;\n    this._chipList.stateChanges.next();\n  }\n\n  /** Checks to see if the (chipEnd) event needs to be emitted. */\n  _emitChipEnd(event?: KeyboardEvent) {\n    if (!this._inputElement.value && !!event) {\n      this._chipList._keydown(event);\n    }\n    if (!event || this._isSeparatorKey(event)) {\n      this.chipEnd.emit({ input: this._inputElement, value: this._inputElement.value });\n\n      if (event) {\n        event.preventDefault();\n      }\n    }\n  }\n\n  _onInput() {\n    // Let chip list know whenever the value changes.\n    this._chipList.stateChanges.next();\n  }\n\n  /** Focuses the input. */\n  focus(options?: FocusOptions): void {\n    this._inputElement.focus(options);\n  }\n\n  /** Checks whether a keycode is one of the configured separators. */\n  private _isSeparatorKey(event: KeyboardEvent) {\n    return !hasModifierKey(event) && new Set(this.separatorKeyCodes).has(event.keyCode);\n  }\n\n  static ngAcceptInputType_addOnBlur: BooleanInput;\n  static ngAcceptInputType_disabled: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ENTER} from '@angular/cdk/keycodes';\nimport {NgModule} from '@angular/core';\nimport {ErrorStateMatcher} from '@angular/material/core';\nimport {MatChip, MatChipAvatar, MatChipRemove, MatChipTrailingIcon} from './chip';\nimport {MAT_CHIPS_DEFAULT_OPTIONS, MatChipsDefaultOptions} from './chip-default-options';\nimport {MatChipInput} from './chip-input';\nimport {MatChipList} from './chip-list';\n\nconst CHIP_DECLARATIONS = [\n  MatChipList,\n  MatChip,\n  MatChipInput,\n  MatChipRemove,\n  MatChipAvatar,\n  MatChipTrailingIcon,\n];\n\n@NgModule({\n  exports: CHIP_DECLARATIONS,\n  declarations: CHIP_DECLARATIONS,\n  providers: [\n    ErrorStateMatcher,\n    {\n      provide: MAT_CHIPS_DEFAULT_OPTIONS,\n      useValue: {\n        separatorKeyCodes: [ENTER]\n      } as MatChipsDefaultOptions\n    }\n  ]\n})\nexport class MatChipsModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './chips-module';\nexport * from './chip-list';\nexport * from './chip';\nexport * from './chip-input';\nexport * from './chip-default-options';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/* tslint:enable:max-line-length */\n/**\n * Filter items emitted by the source Observable by only emitting those that\n * satisfy a specified predicate.\n *\n * <span class=\"informal\">Like\n * [Array.prototype.filter()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter),\n * it only emits a value from the source if it passes a criterion function.</span>\n *\n * <img src=\"./img/filter.png\" width=\"100%\">\n *\n * Similar to the well-known `Array.prototype.filter` method, this operator\n * takes values from the source Observable, passes them through a `predicate`\n * function and only emits those values that yielded `true`.\n *\n * @example <caption>Emit only click events whose target was a DIV element</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var clicksOnDivs = clicks.filter(ev => ev.target.tagName === 'DIV');\n * clicksOnDivs.subscribe(x => console.log(x));\n *\n * @see {@link distinct}\n * @see {@link distinctUntilChanged}\n * @see {@link distinctUntilKeyChanged}\n * @see {@link ignoreElements}\n * @see {@link partition}\n * @see {@link skip}\n *\n * @param {function(value: T, index: number): boolean} predicate A function that\n * evaluates each value emitted by the source Observable. If it returns `true`,\n * the value is emitted, if `false` the value is not passed to the output\n * Observable. The `index` parameter is the number `i` for the i-th source\n * emission that has happened since the subscription, starting from the number\n * `0`.\n * @param {any} [thisArg] An optional argument to determine the value of `this`\n * in the `predicate` function.\n * @return {Observable} An Observable of values from the source that were\n * allowed by the `predicate` function.\n * @method filter\n * @owner Observable\n */\nfunction filter(predicate, thisArg) {\n    return operators_1.filter(predicate, thisArg)(this);\n}\nexports.filter = filter;\n//# sourceMappingURL=filter.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, ElementRef} from '@angular/core';\nimport {FocusableOption} from '@angular/cdk/a11y';\n\n\n@Directive({\n  selector: '[cdkStepHeader]',\n  host: {\n    'role': 'tab',\n  },\n})\nexport class CdkStepHeader implements FocusableOption {\n  constructor(protected _elementRef: ElementRef<HTMLElement>) {}\n\n  /** Focuses the step header. */\n  focus() {\n    this._elementRef.nativeElement.focus();\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, TemplateRef} from '@angular/core';\n\n@Directive({\n  selector: '[cdkStepLabel]',\n})\nexport class CdkStepLabel {\n  constructor(/** @docs-private */ public template: TemplateRef<any>) { }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {FocusableOption, FocusKeyManager} from '@angular/cdk/a11y';\nimport {Direction, Directionality} from '@angular/cdk/bidi';\nimport {\n  BooleanInput,\n  coerceBooleanProperty,\n  coerceNumberProperty,\n  NumberInput\n} from '@angular/cdk/coercion';\nimport {ENTER, hasModifierKey, SPACE} from '@angular/cdk/keycodes';\nimport {DOCUMENT} from '@angular/common';\nimport {\n  AfterViewInit,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ContentChild,\n  ContentChildren,\n  Directive,\n  ElementRef,\n  EventEmitter,\n  forwardRef,\n  Inject,\n  InjectionToken,\n  Input,\n  OnChanges,\n  OnDestroy,\n  Optional,\n  Output,\n  QueryList,\n  TemplateRef,\n  ViewChild,\n  ViewEncapsulation,\n  AfterContentInit,\n} from '@angular/core';\nimport {Observable, of as observableOf, Subject} from 'rxjs';\nimport {startWith, takeUntil} from 'rxjs/operators';\n\nimport {CdkStepHeader} from './step-header';\nimport {CdkStepLabel} from './step-label';\n\n/** Used to generate unique ID for each stepper component. */\nlet nextId = 0;\n\n/**\n * Position state of the content of each step in stepper that is used for transitioning\n * the content into correct position upon step selection change.\n */\nexport type StepContentPositionState = 'previous'|'current'|'next';\n\n/** Possible orientation of a stepper. */\nexport type StepperOrientation = 'horizontal'|'vertical';\n\n/** Change event emitted on selection changes. */\nexport class StepperSelectionEvent {\n  /** Index of the step now selected. */\n  selectedIndex: number;\n\n  /** Index of the step previously selected. */\n  previouslySelectedIndex: number;\n\n  /** The step instance now selected. */\n  selectedStep: CdkStep;\n\n  /** The step instance previously selected. */\n  previouslySelectedStep: CdkStep;\n}\n\n/** The state of each step. */\nexport type StepState = 'number'|'edit'|'done'|'error'|string;\n\n/** Enum to represent the different states of the steps. */\nexport const STEP_STATE = {\n  NUMBER: 'number',\n  EDIT: 'edit',\n  DONE: 'done',\n  ERROR: 'error'\n};\n\n/** InjectionToken that can be used to specify the global stepper options. */\nexport const STEPPER_GLOBAL_OPTIONS = new InjectionToken<StepperOptions>('STEPPER_GLOBAL_OPTIONS');\n\n/**\n * InjectionToken that can be used to specify the global stepper options.\n * @deprecated Use `STEPPER_GLOBAL_OPTIONS` instead.\n * @breaking-change 8.0.0.\n */\nexport const MAT_STEPPER_GLOBAL_OPTIONS = STEPPER_GLOBAL_OPTIONS;\n\n/** Configurable options for stepper. */\nexport interface StepperOptions {\n  /**\n   * Whether the stepper should display an error state or not.\n   * Default behavior is assumed to be false.\n   */\n  showError?: boolean;\n\n  /**\n   * Whether the stepper should display the default indicator type\n   * or not.\n   * Default behavior is assumed to be true.\n   */\n  displayDefaultIndicatorType?: boolean;\n}\n\n@Component({\n  selector: 'cdk-step',\n  exportAs: 'cdkStep',\n  template: '<ng-template><ng-content></ng-content></ng-template>',\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n})\nexport class CdkStep implements OnChanges {\n  private _stepperOptions: StepperOptions;\n  _showError: boolean;\n  _displayDefaultIndicatorType: boolean;\n\n  /** Template for step label if it exists. */\n  @ContentChild(CdkStepLabel) stepLabel: CdkStepLabel;\n\n  /** Template for step content. */\n  @ViewChild(TemplateRef, {static: true}) content: TemplateRef<any>;\n\n  /** The top level abstract control of the step. */\n  @Input() stepControl: AbstractControlLike;\n\n  /** Whether user has seen the expanded step content or not. */\n  interacted = false;\n\n  /** Plain text label of the step. */\n  @Input() label: string;\n\n  /** Error message to display when there's an error. */\n  @Input() errorMessage: string;\n\n  /** Aria label for the tab. */\n  @Input('aria-label') ariaLabel: string;\n\n  /**\n   * Reference to the element that the tab is labelled by.\n   * Will be cleared if `aria-label` is set at the same time.\n   */\n  @Input('aria-labelledby') ariaLabelledby: string;\n\n  /** State of the step. */\n  @Input() state: StepState;\n\n  /** Whether the user can return to this step once it has been marked as completed. */\n  @Input()\n  get editable(): boolean {\n    return this._editable;\n  }\n  set editable(value: boolean) {\n    this._editable = coerceBooleanProperty(value);\n  }\n  private _editable = true;\n\n  /** Whether the completion of step is optional. */\n  @Input()\n  get optional(): boolean {\n    return this._optional;\n  }\n  set optional(value: boolean) {\n    this._optional = coerceBooleanProperty(value);\n  }\n  private _optional = false;\n\n  /** Whether step is marked as completed. */\n  @Input()\n  get completed(): boolean {\n    return this._completedOverride == null ? this._getDefaultCompleted() : this._completedOverride;\n  }\n  set completed(value: boolean) {\n    this._completedOverride = coerceBooleanProperty(value);\n  }\n  _completedOverride: boolean|null = null;\n\n  private _getDefaultCompleted() {\n    return this.stepControl ? this.stepControl.valid && this.interacted : this.interacted;\n  }\n\n  /** Whether step has an error. */\n  @Input()\n  get hasError(): boolean {\n    return this._customError == null ? this._getDefaultError() : this._customError;\n  }\n  set hasError(value: boolean) {\n    this._customError = coerceBooleanProperty(value);\n  }\n  private _customError: boolean|null = null;\n\n  private _getDefaultError() {\n    return this.stepControl && this.stepControl.invalid && this.interacted;\n  }\n\n  /** @breaking-change 8.0.0 remove the `?` after `stepperOptions` */\n  constructor(\n      @Inject(forwardRef(() => CdkStepper)) public _stepper: CdkStepper,\n      @Optional() @Inject(STEPPER_GLOBAL_OPTIONS) stepperOptions?: StepperOptions) {\n    this._stepperOptions = stepperOptions ? stepperOptions : {};\n    this._displayDefaultIndicatorType = this._stepperOptions.displayDefaultIndicatorType !== false;\n    this._showError = !!this._stepperOptions.showError;\n  }\n\n  /** Selects this step component. */\n  select(): void {\n    this._stepper.selected = this;\n  }\n\n  /** Resets the step to its initial state. Note that this includes resetting form data. */\n  reset(): void {\n    this.interacted = false;\n\n    if (this._completedOverride != null) {\n      this._completedOverride = false;\n    }\n\n    if (this._customError != null) {\n      this._customError = false;\n    }\n\n    if (this.stepControl) {\n      this.stepControl.reset();\n    }\n  }\n\n  ngOnChanges() {\n    // Since basically all inputs of the MatStep get proxied through the view down to the\n    // underlying MatStepHeader, we have to make sure that change detection runs correctly.\n    this._stepper._stateChanged();\n  }\n\n  static ngAcceptInputType_editable: BooleanInput;\n  static ngAcceptInputType_hasError: BooleanInput;\n  static ngAcceptInputType_optional: BooleanInput;\n  static ngAcceptInputType_completed: BooleanInput;\n}\n\n@Directive({\n  selector: '[cdkStepper]',\n  exportAs: 'cdkStepper',\n})\nexport class CdkStepper implements AfterContentInit, AfterViewInit, OnDestroy {\n  /** Emits when the component is destroyed. */\n  protected _destroyed = new Subject<void>();\n\n  /** Used for managing keyboard focus. */\n  private _keyManager: FocusKeyManager<FocusableOption>;\n\n  /**\n   * @breaking-change 8.0.0 Remove `| undefined` once the `_document`\n   * constructor param is required.\n   */\n  private _document: Document|undefined;\n\n  /** Full list of steps inside the stepper, including inside nested steppers. */\n  @ContentChildren(CdkStep, {descendants: true}) _steps: QueryList<CdkStep>;\n\n  /** Steps that belong to the current stepper, excluding ones from nested steppers. */\n  readonly steps: QueryList<CdkStep> = new QueryList<CdkStep>();\n\n  /**\n   * The list of step headers of the steps in the stepper.\n   * @deprecated Type to be changed to `QueryList<CdkStepHeader>`.\n   * @breaking-change 8.0.0\n   */\n  @ContentChildren(CdkStepHeader, {descendants: true}) _stepHeader: QueryList<FocusableOption>;\n\n  /** Whether the validity of previous steps should be checked or not. */\n  @Input()\n  get linear(): boolean {\n    return this._linear;\n  }\n  set linear(value: boolean) {\n    this._linear = coerceBooleanProperty(value);\n  }\n  private _linear = false;\n\n  /** The index of the selected step. */\n  @Input()\n  get selectedIndex() {\n    return this._selectedIndex;\n  }\n  set selectedIndex(index: number) {\n    const newIndex = coerceNumberProperty(index);\n\n    if (this.steps && this._steps) {\n      // Ensure that the index can't be out of bounds.\n      if ((newIndex < 0 || newIndex > this.steps.length - 1) &&\n        (typeof ngDevMode === 'undefined' || ngDevMode)) {\n        throw Error('cdkStepper: Cannot assign out-of-bounds value to `selectedIndex`.');\n      }\n\n      if (this._selectedIndex != newIndex && !this._anyControlsInvalidOrPending(newIndex) &&\n          (newIndex >= this._selectedIndex || this.steps.toArray()[newIndex].editable)) {\n        this._updateSelectedItemIndex(index);\n      }\n    } else {\n      this._selectedIndex = newIndex;\n    }\n  }\n  private _selectedIndex = 0;\n\n  /** The step that is selected. */\n  @Input()\n  get selected(): CdkStep {\n    // @breaking-change 8.0.0 Change return type to `CdkStep | undefined`.\n    return this.steps ? this.steps.toArray()[this.selectedIndex] : undefined!;\n  }\n  set selected(step: CdkStep) {\n    this.selectedIndex = this.steps ? this.steps.toArray().indexOf(step) : -1;\n  }\n\n  /** Event emitted when the selected step has changed. */\n  @Output()\n  selectionChange: EventEmitter<StepperSelectionEvent> = new EventEmitter<StepperSelectionEvent>();\n\n  /** Used to track unique ID for each stepper component. */\n  _groupId: number;\n\n  protected _orientation: StepperOrientation = 'horizontal';\n\n  constructor(\n      @Optional() private _dir: Directionality, private _changeDetectorRef: ChangeDetectorRef,\n      // @breaking-change 8.0.0 `_elementRef` and `_document` parameters to become required.\n      private _elementRef?: ElementRef<HTMLElement>, @Inject(DOCUMENT) _document?: any) {\n    this._groupId = nextId++;\n    this._document = _document;\n  }\n\n  ngAfterContentInit() {\n    this._steps.changes\n      .pipe(startWith(this._steps), takeUntil(this._destroyed))\n      .subscribe((steps: QueryList<CdkStep>) => {\n        this.steps.reset(steps.filter(step => step._stepper === this));\n        this.steps.notifyOnChanges();\n      });\n  }\n\n  ngAfterViewInit() {\n    // Note that while the step headers are content children by default, any components that\n    // extend this one might have them as view children. We initialize the keyboard handling in\n    // AfterViewInit so we're guaranteed for both view and content children to be defined.\n    this._keyManager = new FocusKeyManager<FocusableOption>(this._stepHeader)\n                           .withWrap()\n                           .withHomeAndEnd()\n                           .withVerticalOrientation(this._orientation === 'vertical');\n\n    (this._dir ? (this._dir.change as Observable<Direction>) : observableOf<Direction>())\n        .pipe(startWith(this._layoutDirection()), takeUntil(this._destroyed))\n        .subscribe(direction => this._keyManager.withHorizontalOrientation(direction));\n\n    this._keyManager.updateActiveItem(this._selectedIndex);\n\n    // No need to `takeUntil` here, because we're the ones destroying `steps`.\n    this.steps.changes.subscribe(() => {\n      if (!this.selected) {\n        this._selectedIndex = Math.max(this._selectedIndex - 1, 0);\n      }\n    });\n  }\n\n  ngOnDestroy() {\n    this.steps.destroy();\n    this._destroyed.next();\n    this._destroyed.complete();\n  }\n\n  /** Selects and focuses the next step in list. */\n  next(): void {\n    this.selectedIndex = Math.min(this._selectedIndex + 1, this.steps.length - 1);\n  }\n\n  /** Selects and focuses the previous step in list. */\n  previous(): void {\n    this.selectedIndex = Math.max(this._selectedIndex - 1, 0);\n  }\n\n  /** Resets the stepper to its initial state. Note that this includes clearing form data. */\n  reset(): void {\n    this._updateSelectedItemIndex(0);\n    this.steps.forEach(step => step.reset());\n    this._stateChanged();\n  }\n\n  /** Returns a unique id for each step label element. */\n  _getStepLabelId(i: number): string {\n    return `cdk-step-label-${this._groupId}-${i}`;\n  }\n\n  /** Returns unique id for each step content element. */\n  _getStepContentId(i: number): string {\n    return `cdk-step-content-${this._groupId}-${i}`;\n  }\n\n  /** Marks the component to be change detected. */\n  _stateChanged() {\n    this._changeDetectorRef.markForCheck();\n  }\n\n  /** Returns position state of the step with the given index. */\n  _getAnimationDirection(index: number): StepContentPositionState {\n    const position = index - this._selectedIndex;\n    if (position < 0) {\n      return this._layoutDirection() === 'rtl' ? 'next' : 'previous';\n    } else if (position > 0) {\n      return this._layoutDirection() === 'rtl' ? 'previous' : 'next';\n    }\n    return 'current';\n  }\n\n  /** Returns the type of icon to be displayed. */\n  _getIndicatorType(index: number, state: StepState = STEP_STATE.NUMBER): StepState {\n    const step = this.steps.toArray()[index];\n    const isCurrentStep = this._isCurrentStep(index);\n\n    return step._displayDefaultIndicatorType ? this._getDefaultIndicatorLogic(step, isCurrentStep) :\n                                               this._getGuidelineLogic(step, isCurrentStep, state);\n  }\n\n  private _getDefaultIndicatorLogic(step: CdkStep, isCurrentStep: boolean): StepState {\n    if (step._showError && step.hasError && !isCurrentStep) {\n      return STEP_STATE.ERROR;\n    } else if (!step.completed || isCurrentStep) {\n      return STEP_STATE.NUMBER;\n    } else {\n      return step.editable ? STEP_STATE.EDIT : STEP_STATE.DONE;\n    }\n  }\n\n  private _getGuidelineLogic(\n      step: CdkStep, isCurrentStep: boolean, state: StepState = STEP_STATE.NUMBER): StepState {\n    if (step._showError && step.hasError && !isCurrentStep) {\n      return STEP_STATE.ERROR;\n    } else if (step.completed && !isCurrentStep) {\n      return STEP_STATE.DONE;\n    } else if (step.completed && isCurrentStep) {\n      return state;\n    } else if (step.editable && isCurrentStep) {\n      return STEP_STATE.EDIT;\n    } else {\n      return state;\n    }\n  }\n\n  private _isCurrentStep(index: number) {\n    return this._selectedIndex === index;\n  }\n\n  /** Returns the index of the currently-focused step header. */\n  _getFocusIndex() {\n    return this._keyManager ? this._keyManager.activeItemIndex : this._selectedIndex;\n  }\n\n  private _updateSelectedItemIndex(newIndex: number): void {\n    const stepsArray = this.steps.toArray();\n    this.selectionChange.emit({\n      selectedIndex: newIndex,\n      previouslySelectedIndex: this._selectedIndex,\n      selectedStep: stepsArray[newIndex],\n      previouslySelectedStep: stepsArray[this._selectedIndex],\n    });\n\n    // If focus is inside the stepper, move it to the next header, otherwise it may become\n    // lost when the active step content is hidden. We can't be more granular with the check\n    // (e.g. checking whether focus is inside the active step), because we don't have a\n    // reference to the elements that are rendering out the content.\n    this._containsFocus() ? this._keyManager.setActiveItem(newIndex) :\n                            this._keyManager.updateActiveItem(newIndex);\n\n    this._selectedIndex = newIndex;\n    this._stateChanged();\n  }\n\n  _onKeydown(event: KeyboardEvent) {\n    const hasModifier = hasModifierKey(event);\n    const keyCode = event.keyCode;\n    const manager = this._keyManager;\n\n    if (manager.activeItemIndex != null && !hasModifier &&\n        (keyCode === SPACE || keyCode === ENTER)) {\n      this.selectedIndex = manager.activeItemIndex;\n      event.preventDefault();\n    } else {\n      manager.onKeydown(event);\n    }\n  }\n\n  private _anyControlsInvalidOrPending(index: number): boolean {\n    const steps = this.steps.toArray();\n\n    steps[this._selectedIndex].interacted = true;\n\n    if (this._linear && index >= 0) {\n      return steps.slice(0, index).some(step => {\n        const control = step.stepControl;\n        const isIncomplete =\n            control ? (control.invalid || control.pending || !step.interacted) : !step.completed;\n        return isIncomplete && !step.optional && !step._completedOverride;\n      });\n    }\n\n    return false;\n  }\n\n  private _layoutDirection(): Direction {\n    return this._dir && this._dir.value === 'rtl' ? 'rtl' : 'ltr';\n  }\n\n  /** Checks whether the stepper contains the focused element. */\n  private _containsFocus(): boolean {\n    if (!this._document || !this._elementRef) {\n      return false;\n    }\n\n    const stepperElement = this._elementRef.nativeElement;\n    const focusedElement = this._document.activeElement;\n    return stepperElement === focusedElement || stepperElement.contains(focusedElement);\n  }\n\n  static ngAcceptInputType_editable: BooleanInput;\n  static ngAcceptInputType_optional: BooleanInput;\n  static ngAcceptInputType_completed: BooleanInput;\n  static ngAcceptInputType_hasError: BooleanInput;\n  static ngAcceptInputType_linear: BooleanInput;\n  static ngAcceptInputType_selectedIndex: NumberInput;\n}\n\n\n/**\n * Simplified representation of an \"AbstractControl\" from @angular/forms.\n * Used to avoid having to bring in @angular/forms for a single optional interface.\n * @docs-private\n */\ninterface AbstractControlLike {\n  asyncValidator: ((control: any) => any) | null;\n  dirty: boolean;\n  disabled: boolean;\n  enabled: boolean;\n  errors: {[key: string]: any} | null;\n  invalid: boolean;\n  parent: any;\n  pending: boolean;\n  pristine: boolean;\n  root: AbstractControlLike;\n  status: string;\n  statusChanges: Observable<any>;\n  touched: boolean;\n  untouched: boolean;\n  updateOn: any;\n  valid: boolean;\n  validator: ((control: any) => any) | null;\n  value: any;\n  valueChanges: Observable<any>;\n  clearAsyncValidators(): void;\n  clearValidators(): void;\n  disable(opts?: any): void;\n  enable(opts?: any): void;\n  get(path: (string | number)[] | string): AbstractControlLike | null;\n  getError(errorCode: string, path?: (string | number)[] | string): any;\n  hasError(errorCode: string, path?: (string | number)[] | string): boolean;\n  markAllAsTouched(): void;\n  markAsDirty(opts?: any): void;\n  markAsPending(opts?: any): void;\n  markAsPristine(opts?: any): void;\n  markAsTouched(opts?: any): void;\n  markAsUntouched(opts?: any): void;\n  patchValue(value: any, options?: Object): void;\n  reset(value?: any, options?: Object): void;\n  setAsyncValidators(newValidator: (control: any) => any |\n    ((control: any) => any)[] | null): void;\n  setErrors(errors: {[key: string]: any} | null, opts?: any): void;\n  setParent(parent: any): void;\n  setValidators(newValidator: (control: any) => any |\n    ((control: any) => any)[] | null): void;\n  setValue(value: any, options?: Object): void;\n  updateValueAndValidity(opts?: any): void;\n  patchValue(value: any, options?: any): void;\n  reset(formState?: any, options?: any): void;\n  setValue(value: any, options?: any): void;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, HostListener, Input} from '@angular/core';\n\nimport {CdkStepper} from './stepper';\n\n/** Button that moves to the next step in a stepper workflow. */\n@Directive({\n  selector: 'button[cdkStepperNext]',\n  host: {\n    '[type]': 'type',\n  }\n})\nexport class CdkStepperNext {\n  /** Type of the next button. Defaults to \"submit\" if not specified. */\n  @Input() type: string = 'submit';\n\n  constructor(public _stepper: CdkStepper) {}\n\n  // We have to use a `HostListener` here in order to support both Ivy and ViewEngine.\n  // In Ivy the `host` bindings will be merged when this class is extended, whereas in\n  // ViewEngine they're overwritten.\n  // TODO(crisbeto): we move this back into `host` once Ivy is turned on by default.\n  // tslint:disable-next-line:no-host-decorator-in-concrete\n  @HostListener('click')\n  _handleClick() {\n    this._stepper.next();\n  }\n}\n\n/** Button that moves to the previous step in a stepper workflow. */\n@Directive({\n  selector: 'button[cdkStepperPrevious]',\n  host: {\n    '[type]': 'type',\n  }\n})\nexport class CdkStepperPrevious {\n  /** Type of the previous button. Defaults to \"button\" if not specified. */\n  @Input() type: string = 'button';\n\n  constructor(public _stepper: CdkStepper) {}\n\n  // We have to use a `HostListener` here in order to support both Ivy and ViewEngine.\n  // In Ivy the `host` bindings will be merged when this class is extended, whereas in\n  // ViewEngine they're overwritten.\n  // TODO(crisbeto): we move this back into `host` once Ivy is turned on by default.\n  // tslint:disable-next-line:no-host-decorator-in-concrete\n  @HostListener('click')\n  _handleClick() {\n    this._stepper.previous();\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgModule} from '@angular/core';\nimport {CdkStepper, CdkStep} from './stepper';\nimport {CdkStepLabel} from './step-label';\nimport {CdkStepperNext, CdkStepperPrevious} from './stepper-button';\nimport {CdkStepHeader} from './step-header';\nimport {BidiModule} from '@angular/cdk/bidi';\n\n@NgModule({\n  imports: [BidiModule],\n  exports: [\n    CdkStep,\n    CdkStepper,\n    CdkStepHeader,\n    CdkStepLabel,\n    CdkStepperNext,\n    CdkStepperPrevious,\n  ],\n  declarations: [\n    CdkStep,\n    CdkStepper,\n    CdkStepHeader,\n    CdkStepLabel,\n    CdkStepperNext,\n    CdkStepperPrevious,\n  ]\n})\nexport class CdkStepperModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './stepper';\nexport * from './step-label';\nexport * from './stepper-button';\nexport * from './stepper-module';\nexport * from './step-header';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/* tslint:enable:max-line-length */\n/**\n * Groups the items emitted by an Observable according to a specified criterion,\n * and emits these grouped items as `GroupedObservables`, one\n * {@link GroupedObservable} per group.\n *\n * <img src=\"./img/groupBy.png\" width=\"100%\">\n *\n * @example <caption>Group objects by id and return as array</caption>\n * Observable.of<Obj>({id: 1, name: 'aze1'},\n *                    {id: 2, name: 'sf2'},\n *                    {id: 2, name: 'dg2'},\n *                    {id: 1, name: 'erg1'},\n *                    {id: 1, name: 'df1'},\n *                    {id: 2, name: 'sfqfb2'},\n *                    {id: 3, name: 'qfs3'},\n *                    {id: 2, name: 'qsgqsfg2'}\n *     )\n *     .groupBy(p => p.id)\n *     .flatMap( (group$) => group$.reduce((acc, cur) => [...acc, cur], []))\n *     .subscribe(p => console.log(p));\n *\n * // displays:\n * // [ { id: 1, name: 'aze1' },\n * //   { id: 1, name: 'erg1' },\n * //   { id: 1, name: 'df1' } ]\n * //\n * // [ { id: 2, name: 'sf2' },\n * //   { id: 2, name: 'dg2' },\n * //   { id: 2, name: 'sfqfb2' },\n * //   { id: 2, name: 'qsgqsfg2' } ]\n * //\n * // [ { id: 3, name: 'qfs3' } ]\n *\n * @example <caption>Pivot data on the id field</caption>\n * Observable.of<Obj>({id: 1, name: 'aze1'},\n *                    {id: 2, name: 'sf2'},\n *                    {id: 2, name: 'dg2'},\n *                    {id: 1, name: 'erg1'},\n *                    {id: 1, name: 'df1'},\n *                    {id: 2, name: 'sfqfb2'},\n *                    {id: 3, name: 'qfs1'},\n *                    {id: 2, name: 'qsgqsfg2'}\n *                   )\n *     .groupBy(p => p.id, p => p.name)\n *     .flatMap( (group$) => group$.reduce((acc, cur) => [...acc, cur], [\"\" + group$.key]))\n *     .map(arr => ({'id': parseInt(arr[0]), 'values': arr.slice(1)}))\n *     .subscribe(p => console.log(p));\n *\n * // displays:\n * // { id: 1, values: [ 'aze1', 'erg1', 'df1' ] }\n * // { id: 2, values: [ 'sf2', 'dg2', 'sfqfb2', 'qsgqsfg2' ] }\n * // { id: 3, values: [ 'qfs1' ] }\n *\n * @param {function(value: T): K} keySelector A function that extracts the key\n * for each item.\n * @param {function(value: T): R} [elementSelector] A function that extracts the\n * return element for each item.\n * @param {function(grouped: GroupedObservable<K,R>): Observable<any>} [durationSelector]\n * A function that returns an Observable to determine how long each group should\n * exist.\n * @return {Observable<GroupedObservable<K,R>>} An Observable that emits\n * GroupedObservables, each of which corresponds to a unique key value and each\n * of which emits those items from the source Observable that share that key\n * value.\n * @method groupBy\n * @owner Observable\n */\nfunction groupBy(keySelector, elementSelector, durationSelector, subjectSelector) {\n    return operators_1.groupBy(keySelector, elementSelector, durationSelector, subjectSelector)(this);\n}\nexports.groupBy = groupBy;\n//# sourceMappingURL=groupBy.js.map","import { Subscriber } from '../Subscriber';\nimport { ArgumentOutOfRangeError } from '../util/ArgumentOutOfRangeError';\nimport { empty } from '../observable/empty';\nexport function takeLast(count) {\n    return function takeLastOperatorFunction(source) {\n        if (count === 0) {\n            return empty();\n        }\n        else {\n            return source.lift(new TakeLastOperator(count));\n        }\n    };\n}\nclass TakeLastOperator {\n    constructor(total) {\n        this.total = total;\n        if (this.total < 0) {\n            throw new ArgumentOutOfRangeError;\n        }\n    }\n    call(subscriber, source) {\n        return source.subscribe(new TakeLastSubscriber(subscriber, this.total));\n    }\n}\nclass TakeLastSubscriber extends Subscriber {\n    constructor(destination, total) {\n        super(destination);\n        this.total = total;\n        this.ring = new Array();\n        this.count = 0;\n    }\n    _next(value) {\n        const ring = this.ring;\n        const total = this.total;\n        const count = this.count++;\n        if (ring.length < total) {\n            ring.push(value);\n        }\n        else {\n            const index = count % total;\n            ring[index] = value;\n        }\n    }\n    _complete() {\n        const destination = this.destination;\n        let count = this.count;\n        if (count > 0) {\n            const total = this.count >= this.total ? this.total : this.count;\n            const ring = this.ring;\n            for (let i = 0; i < total; i++) {\n                const idx = (count++) % total;\n                destination.next(ring[idx]);\n            }\n        }\n        destination.complete();\n    }\n}\n//# sourceMappingURL=takeLast.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Buffers the source Observable values starting from an emission from\n * `openings` and ending when the output of `closingSelector` emits.\n *\n * <span class=\"informal\">Collects values from the past as an array. Starts\n * collecting only when `opening` emits, and calls the `closingSelector`\n * function to get an Observable that tells when to close the buffer.</span>\n *\n * <img src=\"./img/bufferToggle.png\" width=\"100%\">\n *\n * Buffers values from the source by opening the buffer via signals from an\n * Observable provided to `openings`, and closing and sending the buffers when\n * a Subscribable or Promise returned by the `closingSelector` function emits.\n *\n * @example <caption>Every other second, emit the click events from the next 500ms</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var openings = Rx.Observable.interval(1000);\n * var buffered = clicks.bufferToggle(openings, i =>\n *   i % 2 ? Rx.Observable.interval(500) : Rx.Observable.empty()\n * );\n * buffered.subscribe(x => console.log(x));\n *\n * @see {@link buffer}\n * @see {@link bufferCount}\n * @see {@link bufferTime}\n * @see {@link bufferWhen}\n * @see {@link windowToggle}\n *\n * @param {SubscribableOrPromise<O>} openings A Subscribable or Promise of notifications to start new\n * buffers.\n * @param {function(value: O): SubscribableOrPromise} closingSelector A function that takes\n * the value emitted by the `openings` observable and returns a Subscribable or Promise,\n * which, when it emits, signals that the associated buffer should be emitted\n * and cleared.\n * @return {Observable<T[]>} An observable of arrays of buffered values.\n * @method bufferToggle\n * @owner Observable\n */\nfunction bufferToggle(openings, closingSelector) {\n    return operators_1.bufferToggle(openings, closingSelector)(this);\n}\nexports.bufferToggle = bufferToggle;\n//# sourceMappingURL=bufferToggle.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar do_1 = require(\"../../operator/do\");\nrxjs_1.Observable.prototype.do = do_1._do;\nrxjs_1.Observable.prototype._do = do_1._do;\n//# sourceMappingURL=do.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.of = rxjs_1.of;\n//# sourceMappingURL=of.js.map","function _nonIterableSpread() {\n  throw new TypeError(\"Invalid attempt to spread non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");\n}\n\nmodule.exports = _nonIterableSpread;","import arrayLikeToArray from \"./arrayLikeToArray\";\nexport default function _unsupportedIterableToArray(o, minLen) {\n  if (!o) return;\n  if (typeof o === \"string\") return arrayLikeToArray(o, minLen);\n  var n = Object.prototype.toString.call(o).slice(8, -1);\n  if (n === \"Object\" && o.constructor) n = o.constructor.name;\n  if (n === \"Map\" || n === \"Set\") return Array.from(o);\n  if (n === \"Arguments\" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return arrayLikeToArray(o, minLen);\n}","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar repeat_1 = require(\"../../operator/repeat\");\nrxjs_1.Observable.prototype.repeat = repeat_1.repeat;\n//# sourceMappingURL=repeat.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar groupBy_1 = require(\"../../operator/groupBy\");\nrxjs_1.Observable.prototype.groupBy = groupBy_1.groupBy;\n//# sourceMappingURL=groupBy.js.map","import { iterator as Symbol_iterator } from '../symbol/iterator';\nexport function isIterable(input) {\n    return input && typeof input[Symbol_iterator] === 'function';\n}\n//# sourceMappingURL=isIterable.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Skip the last `count` values emitted by the source Observable.\n *\n * <img src=\"./img/skipLast.png\" width=\"100%\">\n *\n * `skipLast` returns an Observable that accumulates a queue with a length\n * enough to store the first `count` values. As more values are received,\n * values are taken from the front of the queue and produced on the result\n * sequence. This causes values to be delayed.\n *\n * @example <caption>Skip the last 2 values of an Observable with many values</caption>\n * var many = Rx.Observable.range(1, 5);\n * var skipLastTwo = many.skipLast(2);\n * skipLastTwo.subscribe(x => console.log(x));\n *\n * // Results in:\n * // 1 2 3\n *\n * @see {@link skip}\n * @see {@link skipUntil}\n * @see {@link skipWhile}\n * @see {@link take}\n *\n * @throws {ArgumentOutOfRangeError} When using `skipLast(i)`, it throws\n * ArgumentOutOrRangeError if `i < 0`.\n *\n * @param {number} count Number of elements to skip from the end of the source Observable.\n * @returns {Observable<T>} An Observable that skips the last count values\n * emitted by the source Observable.\n * @method skipLast\n * @owner Observable\n */\nfunction skipLast(count) {\n    return operators_1.skipLast(count)(this);\n}\nexports.skipLast = skipLast;\n//# sourceMappingURL=skipLast.js.map","import { observable as Symbol_observable } from '../symbol/observable';\nexport const subscribeToObservable = (obj) => (subscriber) => {\n    const obs = obj[Symbol_observable]();\n    if (typeof obs.subscribe !== 'function') {\n        throw new TypeError('Provided object does not correctly implement Symbol.observable');\n    }\n    else {\n        return obs.subscribe(subscriber);\n    }\n};\n//# sourceMappingURL=subscribeToObservable.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Emits the most recently emitted value from the source Observable whenever\n * another Observable, the `notifier`, emits.\n *\n * <span class=\"informal\">It's like {@link sampleTime}, but samples whenever\n * the `notifier` Observable emits something.</span>\n *\n * <img src=\"./img/sample.png\" width=\"100%\">\n *\n * Whenever the `notifier` Observable emits a value or completes, `sample`\n * looks at the source Observable and emits whichever value it has most recently\n * emitted since the previous sampling, unless the source has not emitted\n * anything since the previous sampling. The `notifier` is subscribed to as soon\n * as the output Observable is subscribed.\n *\n * @example <caption>On every click, sample the most recent \"seconds\" timer</caption>\n * var seconds = Rx.Observable.interval(1000);\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = seconds.sample(clicks);\n * result.subscribe(x => console.log(x));\n *\n * @see {@link audit}\n * @see {@link debounce}\n * @see {@link sampleTime}\n * @see {@link throttle}\n *\n * @param {Observable<any>} notifier The Observable to use for sampling the\n * source Observable.\n * @return {Observable<T>} An Observable that emits the results of sampling the\n * values emitted by the source Observable whenever the notifier Observable\n * emits value or completes.\n * @method sample\n * @owner Observable\n */\nfunction sample(notifier) {\n    return operators_1.sample(notifier)(this);\n}\nexports.sample = sample;\n//# sourceMappingURL=sample.js.map","export default function _iterableToArrayLimit(arr, i) {\n  if (typeof Symbol === \"undefined\" || !(Symbol.iterator in Object(arr))) return;\n  var _arr = [];\n  var _n = true;\n  var _d = false;\n  var _e = undefined;\n\n  try {\n    for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {\n      _arr.push(_s.value);\n\n      if (i && _arr.length === i) break;\n    }\n  } catch (err) {\n    _d = true;\n    _e = err;\n  } finally {\n    try {\n      if (!_n && _i[\"return\"] != null) _i[\"return\"]();\n    } finally {\n      if (_d) throw _e;\n    }\n  }\n\n  return _arr;\n}","import { Observable } from '../Observable';\nimport { subscribeTo } from '../util/subscribeTo';\nimport { scheduled } from '../scheduled/scheduled';\nexport function from(input, scheduler) {\n    if (!scheduler) {\n        if (input instanceof Observable) {\n            return input;\n        }\n        return new Observable(subscribeTo(input));\n    }\n    else {\n        return scheduled(input, scheduler);\n    }\n}\n//# sourceMappingURL=from.js.map","import { Subscriber } from '../Subscriber';\nexport function mapTo(value) {\n    return (source) => source.lift(new MapToOperator(value));\n}\nclass MapToOperator {\n    constructor(value) {\n        this.value = value;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new MapToSubscriber(subscriber, this.value));\n    }\n}\nclass MapToSubscriber extends Subscriber {\n    constructor(destination, value) {\n        super(destination);\n        this.value = value;\n    }\n    _next(x) {\n        this.destination.next(this.value);\n    }\n}\n//# sourceMappingURL=mapTo.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * @return {ConnectableObservable<T>}\n * @method publishLast\n * @owner Observable\n */\nfunction publishLast() {\n    //TODO(benlesh): correct type-flow through here.\n    return operators_1.publishLast()(this);\n}\nexports.publishLast = publishLast;\n//# sourceMappingURL=publishLast.js.map","import { AsyncAction } from './AsyncAction';\nimport { AsyncScheduler } from './AsyncScheduler';\nexport const asyncScheduler = new AsyncScheduler(AsyncAction);\nexport const async = asyncScheduler;\n//# sourceMappingURL=async.js.map","export const isArray = (() => Array.isArray || ((x) => x && typeof x.length === 'number'))();\n//# sourceMappingURL=isArray.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar expand_1 = require(\"../../operator/expand\");\nrxjs_1.Observable.prototype.expand = expand_1.expand;\n//# sourceMappingURL=expand.js.map","export default function _arrayWithHoles(arr) {\n  if (Array.isArray(arr)) return arr;\n}","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar defaultIfEmpty_1 = require(\"../../operator/defaultIfEmpty\");\nrxjs_1.Observable.prototype.defaultIfEmpty = defaultIfEmpty_1.defaultIfEmpty;\n//# sourceMappingURL=defaultIfEmpty.js.map","import { Observable } from '../Observable';\nimport { Subscription } from '../Subscription';\nimport { SubscriptionLoggable } from './SubscriptionLoggable';\nimport { applyMixins } from '../util/applyMixins';\nexport class ColdObservable extends Observable {\n    constructor(messages, scheduler) {\n        super(function (subscriber) {\n            const observable = this;\n            const index = observable.logSubscribedFrame();\n            const subscription = new Subscription();\n            subscription.add(new Subscription(() => {\n                observable.logUnsubscribedFrame(index);\n            }));\n            observable.scheduleMessages(subscriber);\n            return subscription;\n        });\n        this.messages = messages;\n        this.subscriptions = [];\n        this.scheduler = scheduler;\n    }\n    scheduleMessages(subscriber) {\n        const messagesLength = this.messages.length;\n        for (let i = 0; i < messagesLength; i++) {\n            const message = this.messages[i];\n            subscriber.add(this.scheduler.schedule(({ message, subscriber }) => { message.notification.observe(subscriber); }, message.frame, { message, subscriber }));\n        }\n    }\n}\napplyMixins(ColdObservable, [SubscriptionLoggable]);\n//# sourceMappingURL=ColdObservable.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/** @docs-private */\nexport function getSortDuplicateSortableIdError(id: string): Error {\n  return Error(`Cannot have two MatSortables with the same id (${id}).`);\n}\n\n/** @docs-private */\nexport function getSortHeaderNotContainedWithinSortError(): Error {\n  return Error(`MatSortHeader must be placed within a parent element with the MatSort directive.`);\n}\n\n/** @docs-private */\nexport function getSortHeaderMissingIdError(): Error {\n  return Error(`MatSortHeader must be provided with a unique id.`);\n}\n\n/** @docs-private */\nexport function getSortInvalidDirectionError(direction: string): Error {\n  return Error(`${direction} is not a valid sort direction ('asc' or 'desc').`);\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {\n  Directive,\n  EventEmitter,\n  Input,\n  OnChanges,\n  OnDestroy,\n  OnInit,\n  Output,\n} from '@angular/core';\nimport {\n  CanDisable,\n  CanDisableCtor,\n  HasInitialized,\n  HasInitializedCtor,\n  mixinDisabled,\n  mixinInitialized,\n} from '@angular/material/core';\nimport {Subject} from 'rxjs';\nimport {SortDirection} from './sort-direction';\nimport {\n  getSortDuplicateSortableIdError,\n  getSortHeaderMissingIdError,\n  getSortInvalidDirectionError,\n} from './sort-errors';\n\n/** Interface for a directive that holds sorting state consumed by `MatSortHeader`. */\nexport interface MatSortable {\n  /** The id of the column being sorted. */\n  id: string;\n\n  /** Starting sort direction. */\n  start: 'asc' | 'desc';\n\n  /** Whether to disable clearing the sorting state. */\n  disableClear: boolean;\n}\n\n/** The current sort state. */\nexport interface Sort {\n  /** The id of the column being sorted. */\n  active: string;\n\n  /** The sort direction. */\n  direction: SortDirection;\n}\n\n// Boilerplate for applying mixins to MatSort.\n/** @docs-private */\nclass MatSortBase {}\nconst _MatSortMixinBase: HasInitializedCtor & CanDisableCtor & typeof MatSortBase =\n    mixinInitialized(mixinDisabled(MatSortBase));\n\n/** Container for MatSortables to manage the sort state and provide default sort parameters. */\n@Directive({\n  selector: '[matSort]',\n  exportAs: 'matSort',\n  host: {'class': 'mat-sort'},\n  inputs: ['disabled: matSortDisabled']\n})\nexport class MatSort extends _MatSortMixinBase\n    implements CanDisable, HasInitialized, OnChanges, OnDestroy, OnInit {\n  /** Collection of all registered sortables that this directive manages. */\n  sortables = new Map<string, MatSortable>();\n\n  /** Used to notify any child components listening to state changes. */\n  readonly _stateChanges = new Subject<void>();\n\n  /** The id of the most recently sorted MatSortable. */\n  @Input('matSortActive') active: string;\n\n  /**\n   * The direction to set when an MatSortable is initially sorted.\n   * May be overriden by the MatSortable's sort start.\n   */\n  @Input('matSortStart') start: 'asc' | 'desc' = 'asc';\n\n  /** The sort direction of the currently active MatSortable. */\n  @Input('matSortDirection')\n  get direction(): SortDirection { return this._direction; }\n  set direction(direction: SortDirection) {\n    if (direction && direction !== 'asc' && direction !== 'desc' &&\n      (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw getSortInvalidDirectionError(direction);\n    }\n    this._direction = direction;\n  }\n  private _direction: SortDirection = '';\n\n  /**\n   * Whether to disable the user from clearing the sort by finishing the sort direction cycle.\n   * May be overriden by the MatSortable's disable clear input.\n   */\n  @Input('matSortDisableClear')\n  get disableClear(): boolean { return this._disableClear; }\n  set disableClear(v: boolean) { this._disableClear = coerceBooleanProperty(v); }\n  private _disableClear: boolean;\n\n  /** Event emitted when the user changes either the active sort or sort direction. */\n  @Output('matSortChange') readonly sortChange: EventEmitter<Sort> = new EventEmitter<Sort>();\n\n  /**\n   * Register function to be used by the contained MatSortables. Adds the MatSortable to the\n   * collection of MatSortables.\n   */\n  register(sortable: MatSortable): void {\n    if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      if (!sortable.id) {\n        throw getSortHeaderMissingIdError();\n      }\n\n      if (this.sortables.has(sortable.id)) {\n        throw getSortDuplicateSortableIdError(sortable.id);\n      }\n    }\n\n    this.sortables.set(sortable.id, sortable);\n  }\n\n  /**\n   * Unregister function to be used by the contained MatSortables. Removes the MatSortable from the\n   * collection of contained MatSortables.\n   */\n  deregister(sortable: MatSortable): void {\n    this.sortables.delete(sortable.id);\n  }\n\n  /** Sets the active sort id and determines the new sort direction. */\n  sort(sortable: MatSortable): void {\n    if (this.active != sortable.id) {\n      this.active = sortable.id;\n      this.direction = sortable.start ? sortable.start : this.start;\n    } else {\n      this.direction = this.getNextSortDirection(sortable);\n    }\n\n    this.sortChange.emit({active: this.active, direction: this.direction});\n  }\n\n  /** Returns the next sort direction of the active sortable, checking for potential overrides. */\n  getNextSortDirection(sortable: MatSortable): SortDirection {\n    if (!sortable) { return ''; }\n\n    // Get the sort direction cycle with the potential sortable overrides.\n    const disableClear = sortable.disableClear != null ? sortable.disableClear : this.disableClear;\n    let sortDirectionCycle = getSortDirectionCycle(sortable.start || this.start, disableClear);\n\n    // Get and return the next direction in the cycle\n    let nextDirectionIndex = sortDirectionCycle.indexOf(this.direction) + 1;\n    if (nextDirectionIndex >= sortDirectionCycle.length) { nextDirectionIndex = 0; }\n    return sortDirectionCycle[nextDirectionIndex];\n  }\n\n  ngOnInit() {\n    this._markInitialized();\n  }\n\n  ngOnChanges() {\n    this._stateChanges.next();\n  }\n\n  ngOnDestroy() {\n    this._stateChanges.complete();\n  }\n\n  static ngAcceptInputType_disableClear: BooleanInput;\n  static ngAcceptInputType_disabled: BooleanInput;\n}\n\n/** Returns the sort direction cycle to use given the provided parameters of order and clear. */\nfunction getSortDirectionCycle(start: 'asc' | 'desc',\n                               disableClear: boolean): SortDirection[] {\n  let sortOrder: SortDirection[] = ['asc', 'desc'];\n  if (start == 'desc') { sortOrder.reverse(); }\n  if (!disableClear) { sortOrder.push(''); }\n\n  return sortOrder;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {\n  animate,\n  state,\n  style,\n  transition,\n  trigger,\n  keyframes,\n  AnimationTriggerMetadata, query, animateChild,\n} from '@angular/animations';\nimport {AnimationCurves, AnimationDurations} from '@angular/material/core';\n\nconst SORT_ANIMATION_TRANSITION = AnimationDurations.ENTERING + ' ' +\n                                  AnimationCurves.STANDARD_CURVE;\n\n/**\n * Animations used by MatSort.\n * @docs-private\n */\nexport const matSortAnimations: {\n  readonly indicator: AnimationTriggerMetadata;\n  readonly leftPointer: AnimationTriggerMetadata;\n  readonly rightPointer: AnimationTriggerMetadata;\n  readonly arrowOpacity: AnimationTriggerMetadata;\n  readonly arrowPosition: AnimationTriggerMetadata;\n  readonly allowChildren: AnimationTriggerMetadata;\n} = {\n  /** Animation that moves the sort indicator. */\n  indicator: trigger('indicator', [\n    state('active-asc, asc', style({transform: 'translateY(0px)'})),\n    // 10px is the height of the sort indicator, minus the width of the pointers\n    state('active-desc, desc', style({transform: 'translateY(10px)'})),\n    transition('active-asc <=> active-desc', animate(SORT_ANIMATION_TRANSITION))\n  ]),\n\n  /** Animation that rotates the left pointer of the indicator based on the sorting direction. */\n  leftPointer: trigger('leftPointer', [\n    state('active-asc, asc', style({transform: 'rotate(-45deg)'})),\n    state('active-desc, desc', style({transform: 'rotate(45deg)'})),\n    transition('active-asc <=> active-desc', animate(SORT_ANIMATION_TRANSITION))\n  ]),\n\n  /** Animation that rotates the right pointer of the indicator based on the sorting direction. */\n  rightPointer: trigger('rightPointer', [\n    state('active-asc, asc', style({transform: 'rotate(45deg)'})),\n    state('active-desc, desc', style({transform: 'rotate(-45deg)'})),\n    transition('active-asc <=> active-desc', animate(SORT_ANIMATION_TRANSITION))\n  ]),\n\n  /** Animation that controls the arrow opacity. */\n  arrowOpacity: trigger('arrowOpacity', [\n    state('desc-to-active, asc-to-active, active', style({opacity: 1})),\n    state('desc-to-hint, asc-to-hint, hint', style({opacity: .54})),\n    state('hint-to-desc, active-to-desc, desc, hint-to-asc, active-to-asc, asc, void',\n        style({opacity: 0})),\n    // Transition between all states except for immediate transitions\n    transition('* => asc, * => desc, * => active, * => hint, * => void', animate('0ms')),\n    transition('* <=> *', animate(SORT_ANIMATION_TRANSITION)),\n  ]),\n\n  /**\n   * Animation for the translation of the arrow as a whole. States are separated into two\n   * groups: ones with animations and others that are immediate. Immediate states are asc, desc,\n   * peek, and active. The other states define a specific animation (source-to-destination)\n   * and are determined as a function of their prev user-perceived state and what the next state\n   * should be.\n   */\n  arrowPosition: trigger('arrowPosition', [\n    // Hidden Above => Hint Center\n    transition('* => desc-to-hint, * => desc-to-active',\n        animate(SORT_ANIMATION_TRANSITION, keyframes([\n          style({transform: 'translateY(-25%)'}),\n          style({transform: 'translateY(0)'})\n        ]))),\n    // Hint Center => Hidden Below\n    transition('* => hint-to-desc, * => active-to-desc',\n        animate(SORT_ANIMATION_TRANSITION, keyframes([\n          style({transform: 'translateY(0)'}),\n          style({transform: 'translateY(25%)'})\n        ]))),\n    // Hidden Below => Hint Center\n    transition('* => asc-to-hint, * => asc-to-active',\n        animate(SORT_ANIMATION_TRANSITION, keyframes([\n          style({transform: 'translateY(25%)'}),\n          style({transform: 'translateY(0)'})\n        ]))),\n    // Hint Center => Hidden Above\n    transition('* => hint-to-asc, * => active-to-asc',\n        animate(SORT_ANIMATION_TRANSITION, keyframes([\n          style({transform: 'translateY(0)'}),\n          style({transform: 'translateY(-25%)'})\n        ]))),\n    state('desc-to-hint, asc-to-hint, hint, desc-to-active, asc-to-active, active',\n        style({transform: 'translateY(0)'})),\n    state('hint-to-desc, active-to-desc, desc',\n        style({transform: 'translateY(-25%)'})),\n    state('hint-to-asc, active-to-asc, asc',\n        style({transform: 'translateY(25%)'})),\n  ]),\n\n  /** Necessary trigger that calls animate on children animations. */\n  allowChildren: trigger('allowChildren', [\n    transition('* <=> *', [\n      query('@*', animateChild(), {optional: true})\n    ])\n  ]),\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable, SkipSelf, Optional} from '@angular/core';\nimport {Subject} from 'rxjs';\n\n/**\n * To modify the labels and text displayed, create a new instance of MatSortHeaderIntl and\n * include it in a custom provider.\n */\n@Injectable({providedIn: 'root'})\nexport class MatSortHeaderIntl {\n  /**\n   * Stream that emits whenever the labels here are changed. Use this to notify\n   * components if the labels have changed after initialization.\n   */\n  readonly changes: Subject<void> = new Subject<void>();\n\n  /**\n   * ARIA label for the sorting button.\n   * @deprecated Not used anymore. To be removed.\n   * @breaking-change 8.0.0\n   */\n  sortButtonLabel = (id: string) => {\n    return `Change sorting for ${id}`;\n  }\n}\n/** @docs-private */\nexport function MAT_SORT_HEADER_INTL_PROVIDER_FACTORY(parentIntl: MatSortHeaderIntl) {\n  return parentIntl || new MatSortHeaderIntl();\n}\n\n/** @docs-private */\nexport const MAT_SORT_HEADER_INTL_PROVIDER = {\n  // If there is already an MatSortHeaderIntl available, use that. Otherwise, provide a new one.\n  provide: MatSortHeaderIntl,\n  deps: [[new Optional(), new SkipSelf(), MatSortHeaderIntl]],\n  useFactory: MAT_SORT_HEADER_INTL_PROVIDER_FACTORY\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  Input,\n  OnDestroy,\n  OnInit,\n  Optional,\n  ViewEncapsulation,\n  Inject,\n  ElementRef,\n  AfterViewInit,\n} from '@angular/core';\nimport {CanDisable, CanDisableCtor, mixinDisabled} from '@angular/material/core';\nimport {FocusMonitor} from '@angular/cdk/a11y';\nimport {ENTER, SPACE} from '@angular/cdk/keycodes';\nimport {merge, Subscription} from 'rxjs';\nimport {MatSort, MatSortable} from './sort';\nimport {matSortAnimations} from './sort-animations';\nimport {SortDirection} from './sort-direction';\nimport {getSortHeaderNotContainedWithinSortError} from './sort-errors';\nimport {MatSortHeaderIntl} from './sort-header-intl';\n\n\n// Boilerplate for applying mixins to the sort header.\n/** @docs-private */\nclass MatSortHeaderBase {}\nconst _MatSortHeaderMixinBase: CanDisableCtor & typeof MatSortHeaderBase =\n    mixinDisabled(MatSortHeaderBase);\n\n/**\n * Valid positions for the arrow to be in for its opacity and translation. If the state is a\n * sort direction, the position of the arrow will be above/below and opacity 0. If the state is\n * hint, the arrow will be in the center with a slight opacity. Active state means the arrow will\n * be fully opaque in the center.\n *\n * @docs-private\n */\nexport type ArrowViewState = SortDirection | 'hint' | 'active';\n\n/**\n * States describing the arrow's animated position (animating fromState to toState).\n * If the fromState is not defined, there will be no animated transition to the toState.\n * @docs-private\n */\nexport interface ArrowViewStateTransition {\n  fromState?: ArrowViewState;\n  toState: ArrowViewState;\n}\n\n/** Column definition associated with a `MatSortHeader`. */\ninterface MatSortHeaderColumnDef {\n  name: string;\n}\n\n/**\n * Applies sorting behavior (click to change sort) and styles to an element, including an\n * arrow to display the current sort direction.\n *\n * Must be provided with an id and contained within a parent MatSort directive.\n *\n * If used on header cells in a CdkTable, it will automatically default its id from its containing\n * column definition.\n */\n@Component({\n  selector: '[mat-sort-header]',\n  exportAs: 'matSortHeader',\n  templateUrl: 'sort-header.html',\n  styleUrls: ['sort-header.css'],\n  host: {\n    'class': 'mat-sort-header',\n    '(click)': '_handleClick()',\n    '(keydown)': '_handleKeydown($event)',\n    '(mouseenter)': '_setIndicatorHintVisible(true)',\n    '(mouseleave)': '_setIndicatorHintVisible(false)',\n    '[attr.aria-sort]': '_getAriaSortAttribute()',\n    '[class.mat-sort-header-disabled]': '_isDisabled()',\n  },\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  inputs: ['disabled'],\n  animations: [\n    matSortAnimations.indicator,\n    matSortAnimations.leftPointer,\n    matSortAnimations.rightPointer,\n    matSortAnimations.arrowOpacity,\n    matSortAnimations.arrowPosition,\n    matSortAnimations.allowChildren,\n  ]\n})\nexport class MatSortHeader extends _MatSortHeaderMixinBase\n    implements CanDisable, MatSortable, OnDestroy, OnInit, AfterViewInit {\n  private _rerenderSubscription: Subscription;\n\n  /**\n   * Flag set to true when the indicator should be displayed while the sort is not active. Used to\n   * provide an affordance that the header is sortable by showing on focus and hover.\n   */\n  _showIndicatorHint: boolean = false;\n\n  /**\n   * The view transition state of the arrow (translation/ opacity) - indicates its `from` and `to`\n   * position through the animation. If animations are currently disabled, the fromState is removed\n   * so that there is no animation displayed.\n   */\n  _viewState: ArrowViewStateTransition;\n\n  /** The direction the arrow should be facing according to the current state. */\n  _arrowDirection: SortDirection = '';\n\n  /**\n   * Whether the view state animation should show the transition between the `from` and `to` states.\n   */\n  _disableViewStateAnimation = false;\n\n  /**\n   * ID of this sort header. If used within the context of a CdkColumnDef, this will default to\n   * the column's name.\n   */\n  @Input('mat-sort-header') id: string;\n\n  /** Sets the position of the arrow that displays when sorted. */\n  @Input() arrowPosition: 'before' | 'after' = 'after';\n\n  /** Overrides the sort start value of the containing MatSort for this MatSortable. */\n  @Input() start: 'asc' | 'desc';\n\n  /** Overrides the disable clear value of the containing MatSort for this MatSortable. */\n  @Input()\n  get disableClear(): boolean { return this._disableClear; }\n  set disableClear(v) { this._disableClear = coerceBooleanProperty(v); }\n  private _disableClear: boolean;\n\n  constructor(public _intl: MatSortHeaderIntl,\n              changeDetectorRef: ChangeDetectorRef,\n              // `MatSort` is not optionally injected, but just asserted manually w/ better error.\n              // tslint:disable-next-line: lightweight-tokens\n              @Optional() public _sort: MatSort,\n              @Inject('MAT_SORT_HEADER_COLUMN_DEF') @Optional()\n                  public _columnDef: MatSortHeaderColumnDef,\n              private _focusMonitor: FocusMonitor,\n              private _elementRef: ElementRef<HTMLElement>) {\n    // Note that we use a string token for the `_columnDef`, because the value is provided both by\n    // `material/table` and `cdk/table` and we can't have the CDK depending on Material,\n    // and we want to avoid having the sort header depending on the CDK table because\n    // of this single reference.\n    super();\n\n    if (!_sort && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw getSortHeaderNotContainedWithinSortError();\n    }\n\n    this._rerenderSubscription = merge(_sort.sortChange, _sort._stateChanges, _intl.changes)\n        .subscribe(() => {\n          if (this._isSorted()) {\n            this._updateArrowDirection();\n          }\n\n          // If this header was recently active and now no longer sorted, animate away the arrow.\n          if (!this._isSorted() && this._viewState && this._viewState.toState === 'active') {\n            this._disableViewStateAnimation = false;\n            this._setAnimationTransitionState({fromState: 'active', toState: this._arrowDirection});\n          }\n\n          changeDetectorRef.markForCheck();\n        });\n  }\n\n  ngOnInit() {\n    if (!this.id && this._columnDef) {\n      this.id = this._columnDef.name;\n    }\n\n    // Initialize the direction of the arrow and set the view state to be immediately that state.\n    this._updateArrowDirection();\n    this._setAnimationTransitionState(\n        {toState: this._isSorted() ? 'active' : this._arrowDirection});\n\n    this._sort.register(this);\n  }\n\n  ngAfterViewInit() {\n    // We use the focus monitor because we also want to style\n    // things differently based on the focus origin.\n    this._focusMonitor.monitor(this._elementRef, true)\n        .subscribe(origin => this._setIndicatorHintVisible(!!origin));\n  }\n\n  ngOnDestroy() {\n    this._focusMonitor.stopMonitoring(this._elementRef);\n    this._sort.deregister(this);\n    this._rerenderSubscription.unsubscribe();\n  }\n\n  /**\n   * Sets the \"hint\" state such that the arrow will be semi-transparently displayed as a hint to the\n   * user showing what the active sort will become. If set to false, the arrow will fade away.\n   */\n  _setIndicatorHintVisible(visible: boolean) {\n    // No-op if the sort header is disabled - should not make the hint visible.\n    if (this._isDisabled() && visible) { return; }\n\n    this._showIndicatorHint = visible;\n\n    if (!this._isSorted()) {\n      this._updateArrowDirection();\n      if (this._showIndicatorHint) {\n        this._setAnimationTransitionState({fromState: this._arrowDirection, toState: 'hint'});\n      } else {\n        this._setAnimationTransitionState({fromState: 'hint', toState: this._arrowDirection});\n      }\n    }\n  }\n\n  /**\n   * Sets the animation transition view state for the arrow's position and opacity. If the\n   * `disableViewStateAnimation` flag is set to true, the `fromState` will be ignored so that\n   * no animation appears.\n   */\n  _setAnimationTransitionState(viewState: ArrowViewStateTransition) {\n    this._viewState = viewState;\n\n    // If the animation for arrow position state (opacity/translation) should be disabled,\n    // remove the fromState so that it jumps right to the toState.\n    if (this._disableViewStateAnimation) {\n      this._viewState = {toState: viewState.toState};\n    }\n  }\n\n  /** Triggers the sort on this sort header and removes the indicator hint. */\n  _toggleOnInteraction() {\n\n    this._sort.sort(this);\n\n    // Do not show the animation if the header was already shown in the right position.\n    if (this._viewState.toState === 'hint' || this._viewState.toState === 'active') {\n      this._disableViewStateAnimation = true;\n    }\n\n    // If the arrow is now sorted, animate the arrow into place. Otherwise, animate it away into\n    // the direction it is facing.\n    const viewState: ArrowViewStateTransition = this._isSorted() ?\n        {fromState: this._arrowDirection, toState: 'active'} :\n        {fromState: 'active', toState: this._arrowDirection};\n    this._setAnimationTransitionState(viewState);\n\n    this._showIndicatorHint = false;\n  }\n\n  _handleClick() {\n    if (!this._isDisabled()) {\n      this._toggleOnInteraction();\n    }\n  }\n\n  _handleKeydown(event: KeyboardEvent) {\n    if (!this._isDisabled() && (event.keyCode === SPACE || event.keyCode === ENTER)) {\n      event.preventDefault();\n      this._toggleOnInteraction();\n    }\n  }\n\n  /** Whether this MatSortHeader is currently sorted in either ascending or descending order. */\n  _isSorted() {\n    return this._sort.active == this.id &&\n        (this._sort.direction === 'asc' || this._sort.direction === 'desc');\n  }\n\n  /** Returns the animation state for the arrow direction (indicator and pointers). */\n  _getArrowDirectionState() {\n    return `${this._isSorted() ? 'active-' : ''}${this._arrowDirection}`;\n  }\n\n  /** Returns the arrow position state (opacity, translation). */\n  _getArrowViewState() {\n    const fromState = this._viewState.fromState;\n    return (fromState ? `${fromState}-to-` : '') + this._viewState.toState;\n  }\n\n  /**\n   * Updates the direction the arrow should be pointing. If it is not sorted, the arrow should be\n   * facing the start direction. Otherwise if it is sorted, the arrow should point in the currently\n   * active sorted direction. The reason this is updated through a function is because the direction\n   * should only be changed at specific times - when deactivated but the hint is displayed and when\n   * the sort is active and the direction changes. Otherwise the arrow's direction should linger\n   * in cases such as the sort becoming deactivated but we want to animate the arrow away while\n   * preserving its direction, even though the next sort direction is actually different and should\n   * only be changed once the arrow displays again (hint or activation).\n   */\n  _updateArrowDirection() {\n    this._arrowDirection = this._isSorted() ?\n        this._sort.direction :\n        (this.start || this._sort.start);\n  }\n\n  _isDisabled() {\n    return this._sort.disabled || this.disabled;\n  }\n\n  /**\n   * Gets the aria-sort attribute that should be applied to this sort header. If this header\n   * is not sorted, returns null so that the attribute is removed from the host element. Aria spec\n   * says that the aria-sort property should only be present on one header at a time, so removing\n   * ensures this is true.\n   */\n  _getAriaSortAttribute() {\n    if (!this._isSorted()) {\n      return 'none';\n    }\n\n    return this._sort.direction == 'asc' ? 'ascending' : 'descending';\n  }\n\n  /** Whether the arrow inside the sort header should be rendered. */\n  _renderArrow() {\n    return !this._isDisabled() || this._isSorted();\n  }\n\n  static ngAcceptInputType_disableClear: BooleanInput;\n  static ngAcceptInputType_disabled: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgModule} from '@angular/core';\nimport {MatSortHeader} from './sort-header';\nimport {MatSort} from './sort';\nimport {MAT_SORT_HEADER_INTL_PROVIDER} from './sort-header-intl';\nimport {CommonModule} from '@angular/common';\n\n\n@NgModule({\n  imports: [CommonModule],\n  exports: [MatSort, MatSortHeader],\n  declarations: [MatSort, MatSortHeader],\n  providers: [MAT_SORT_HEADER_INTL_PROVIDER]\n})\nexport class MatSortModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport type SortDirection = 'asc' | 'desc' | '';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './sort-module';\nexport * from './sort-direction';\nexport * from './sort-header';\nexport * from './sort-header-intl';\nexport * from './sort';\nexport * from './sort-animations';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar onErrorResumeNext_1 = require(\"../../operator/onErrorResumeNext\");\nrxjs_1.Observable.prototype.onErrorResumeNext = onErrorResumeNext_1.onErrorResumeNext;\n//# sourceMappingURL=onErrorResumeNext.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar combineLatest_1 = require(\"../../operator/combineLatest\");\nrxjs_1.Observable.prototype.combineLatest = combineLatest_1.combineLatest;\n//# sourceMappingURL=combineLatest.js.map","import { SubjectSubscriber } from '../Subject';\nimport { Observable } from '../Observable';\nimport { Subscriber } from '../Subscriber';\nimport { Subscription } from '../Subscription';\nimport { refCount as higherOrderRefCount } from '../operators/refCount';\nexport class ConnectableObservable extends Observable {\n    constructor(source, subjectFactory) {\n        super();\n        this.source = source;\n        this.subjectFactory = subjectFactory;\n        this._refCount = 0;\n        this._isComplete = false;\n    }\n    _subscribe(subscriber) {\n        return this.getSubject().subscribe(subscriber);\n    }\n    getSubject() {\n        const subject = this._subject;\n        if (!subject || subject.isStopped) {\n            this._subject = this.subjectFactory();\n        }\n        return this._subject;\n    }\n    connect() {\n        let connection = this._connection;\n        if (!connection) {\n            this._isComplete = false;\n            connection = this._connection = new Subscription();\n            connection.add(this.source\n                .subscribe(new ConnectableSubscriber(this.getSubject(), this)));\n            if (connection.closed) {\n                this._connection = null;\n                connection = Subscription.EMPTY;\n            }\n        }\n        return connection;\n    }\n    refCount() {\n        return higherOrderRefCount()(this);\n    }\n}\nexport const connectableObservableDescriptor = (() => {\n    const connectableProto = ConnectableObservable.prototype;\n    return {\n        operator: { value: null },\n        _refCount: { value: 0, writable: true },\n        _subject: { value: null, writable: true },\n        _connection: { value: null, writable: true },\n        _subscribe: { value: connectableProto._subscribe },\n        _isComplete: { value: connectableProto._isComplete, writable: true },\n        getSubject: { value: connectableProto.getSubject },\n        connect: { value: connectableProto.connect },\n        refCount: { value: connectableProto.refCount }\n    };\n})();\nclass ConnectableSubscriber extends SubjectSubscriber {\n    constructor(destination, connectable) {\n        super(destination);\n        this.connectable = connectable;\n    }\n    _error(err) {\n        this._unsubscribe();\n        super._error(err);\n    }\n    _complete() {\n        this.connectable._isComplete = true;\n        this._unsubscribe();\n        super._complete();\n    }\n    _unsubscribe() {\n        const connectable = this.connectable;\n        if (connectable) {\n            this.connectable = null;\n            const connection = connectable._connection;\n            connectable._refCount = 0;\n            connectable._subject = null;\n            connectable._connection = null;\n            if (connection) {\n                connection.unsubscribe();\n            }\n        }\n    }\n}\nclass RefCountOperator {\n    constructor(connectable) {\n        this.connectable = connectable;\n    }\n    call(subscriber, source) {\n        const { connectable } = this;\n        connectable._refCount++;\n        const refCounter = new RefCountSubscriber(subscriber, connectable);\n        const subscription = source.subscribe(refCounter);\n        if (!refCounter.closed) {\n            refCounter.connection = connectable.connect();\n        }\n        return subscription;\n    }\n}\nclass RefCountSubscriber extends Subscriber {\n    constructor(destination, connectable) {\n        super(destination);\n        this.connectable = connectable;\n    }\n    _unsubscribe() {\n        const { connectable } = this;\n        if (!connectable) {\n            this.connection = null;\n            return;\n        }\n        this.connectable = null;\n        const refCount = connectable._refCount;\n        if (refCount <= 0) {\n            this.connection = null;\n            return;\n        }\n        connectable._refCount = refCount - 1;\n        if (refCount > 1) {\n            this.connection = null;\n            return;\n        }\n        const { connection } = this;\n        const sharedConnection = connectable._connection;\n        this.connection = null;\n        if (sharedConnection && (!connection || sharedConnection === connection)) {\n            sharedConnection.unsubscribe();\n        }\n    }\n}\n//# sourceMappingURL=ConnectableObservable.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar single_1 = require(\"../../operator/single\");\nrxjs_1.Observable.prototype.single = single_1.single;\n//# sourceMappingURL=single.js.map","import { Observable } from '../Observable';\nexport const EMPTY = new Observable(subscriber => subscriber.complete());\nexport function empty(scheduler) {\n    return scheduler ? emptyScheduled(scheduler) : EMPTY;\n}\nfunction emptyScheduled(scheduler) {\n    return new Observable(subscriber => scheduler.schedule(() => subscriber.complete()));\n}\n//# sourceMappingURL=empty.js.map","function _iterableToArray(iter) {\n  if (typeof Symbol !== \"undefined\" && Symbol.iterator in Object(iter)) return Array.from(iter);\n}\n\nmodule.exports = _iterableToArray;","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Returns an Observable that repeats the stream of items emitted by the source Observable at most count times.\n *\n * <img src=\"./img/repeat.png\" width=\"100%\">\n *\n * @param {number} [count] The number of times the source Observable items are repeated, a count of 0 will yield\n * an empty Observable.\n * @return {Observable} An Observable that repeats the stream of items emitted by the source Observable at most\n * count times.\n * @method repeat\n * @owner Observable\n */\nfunction repeat(count) {\n    if (count === void 0) { count = -1; }\n    return operators_1.repeat(count)(this);\n}\nexports.repeat = repeat;\n//# sourceMappingURL=repeat.js.map","export function not(pred, thisArg) {\n    function notPred() {\n        return !(notPred.pred.apply(notPred.thisArg, arguments));\n    }\n    notPred.pred = pred;\n    notPred.thisArg = thisArg;\n    return notPred;\n}\n//# sourceMappingURL=not.js.map","import { Subscription } from '../Subscription';\nimport { subscribeToResult } from '../util/subscribeToResult';\nimport { OuterSubscriber } from '../OuterSubscriber';\nexport function bufferToggle(openings, closingSelector) {\n    return function bufferToggleOperatorFunction(source) {\n        return source.lift(new BufferToggleOperator(openings, closingSelector));\n    };\n}\nclass BufferToggleOperator {\n    constructor(openings, closingSelector) {\n        this.openings = openings;\n        this.closingSelector = closingSelector;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new BufferToggleSubscriber(subscriber, this.openings, this.closingSelector));\n    }\n}\nclass BufferToggleSubscriber extends OuterSubscriber {\n    constructor(destination, openings, closingSelector) {\n        super(destination);\n        this.closingSelector = closingSelector;\n        this.contexts = [];\n        this.add(subscribeToResult(this, openings));\n    }\n    _next(value) {\n        const contexts = this.contexts;\n        const len = contexts.length;\n        for (let i = 0; i < len; i++) {\n            contexts[i].buffer.push(value);\n        }\n    }\n    _error(err) {\n        const contexts = this.contexts;\n        while (contexts.length > 0) {\n            const context = contexts.shift();\n            context.subscription.unsubscribe();\n            context.buffer = null;\n            context.subscription = null;\n        }\n        this.contexts = null;\n        super._error(err);\n    }\n    _complete() {\n        const contexts = this.contexts;\n        while (contexts.length > 0) {\n            const context = contexts.shift();\n            this.destination.next(context.buffer);\n            context.subscription.unsubscribe();\n            context.buffer = null;\n            context.subscription = null;\n        }\n        this.contexts = null;\n        super._complete();\n    }\n    notifyNext(outerValue, innerValue) {\n        outerValue ? this.closeBuffer(outerValue) : this.openBuffer(innerValue);\n    }\n    notifyComplete(innerSub) {\n        this.closeBuffer(innerSub.context);\n    }\n    openBuffer(value) {\n        try {\n            const closingSelector = this.closingSelector;\n            const closingNotifier = closingSelector.call(this, value);\n            if (closingNotifier) {\n                this.trySubscribe(closingNotifier);\n            }\n        }\n        catch (err) {\n            this._error(err);\n        }\n    }\n    closeBuffer(context) {\n        const contexts = this.contexts;\n        if (contexts && context) {\n            const { buffer, subscription } = context;\n            this.destination.next(buffer);\n            contexts.splice(contexts.indexOf(context), 1);\n            this.remove(subscription);\n            subscription.unsubscribe();\n        }\n    }\n    trySubscribe(closingNotifier) {\n        const contexts = this.contexts;\n        const buffer = [];\n        const subscription = new Subscription();\n        const context = { buffer, subscription };\n        contexts.push(context);\n        const innerSubscription = subscribeToResult(this, closingNotifier, context);\n        if (!innerSubscription || innerSubscription.closed) {\n            this.closeBuffer(context);\n        }\n        else {\n            innerSubscription.context = context;\n            this.add(innerSubscription);\n            subscription.add(innerSubscription);\n        }\n    }\n}\n//# sourceMappingURL=bufferToggle.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Converts an Observable of {@link Notification} objects into the emissions\n * that they represent.\n *\n * <span class=\"informal\">Unwraps {@link Notification} objects as actual `next`,\n * `error` and `complete` emissions. The opposite of {@link materialize}.</span>\n *\n * <img src=\"./img/dematerialize.png\" width=\"100%\">\n *\n * `dematerialize` is assumed to operate an Observable that only emits\n * {@link Notification} objects as `next` emissions, and does not emit any\n * `error`. Such Observable is the output of a `materialize` operation. Those\n * notifications are then unwrapped using the metadata they contain, and emitted\n * as `next`, `error`, and `complete` on the output Observable.\n *\n * Use this operator in conjunction with {@link materialize}.\n *\n * @example <caption>Convert an Observable of Notifications to an actual Observable</caption>\n * var notifA = new Rx.Notification('N', 'A');\n * var notifB = new Rx.Notification('N', 'B');\n * var notifE = new Rx.Notification('E', void 0,\n *   new TypeError('x.toUpperCase is not a function')\n * );\n * var materialized = Rx.Observable.of(notifA, notifB, notifE);\n * var upperCase = materialized.dematerialize();\n * upperCase.subscribe(x => console.log(x), e => console.error(e));\n *\n * // Results in:\n * // A\n * // B\n * // TypeError: x.toUpperCase is not a function\n *\n * @see {@link Notification}\n * @see {@link materialize}\n *\n * @return {Observable} An Observable that emits items and notifications\n * embedded in Notification objects emitted by the source Observable.\n * @method dematerialize\n * @owner Observable\n */\nfunction dematerialize() {\n    return operators_1.dematerialize()(this);\n}\nexports.dematerialize = dematerialize;\n//# sourceMappingURL=dematerialize.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Version} from '@angular/core';\n\n/** Current version of Angular Material. */\nexport const VERSION = new Version('10.2.3');\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/** @docs-private */\nexport class AnimationCurves {\n  static STANDARD_CURVE = 'cubic-bezier(0.4,0.0,0.2,1)';\n  static DECELERATION_CURVE = 'cubic-bezier(0.0,0.0,0.2,1)';\n  static ACCELERATION_CURVE = 'cubic-bezier(0.4,0.0,1,1)';\n  static SHARP_CURVE = 'cubic-bezier(0.4,0.0,0.6,1)';\n}\n\n\n/** @docs-private */\nexport class AnimationDurations {\n  static COMPLEX = '375ms';\n  static ENTERING = '225ms';\n  static EXITING = '195ms';\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {HighContrastModeDetector} from '@angular/cdk/a11y';\nimport {BidiModule} from '@angular/cdk/bidi';\nimport {Inject, InjectionToken, isDevMode, NgModule, Optional, Version} from '@angular/core';\nimport {VERSION as CDK_VERSION} from '@angular/cdk';\nimport {DOCUMENT} from '@angular/common';\n\n// Private version constant to circumvent test/build issues,\n// i.e. avoid core to depend on the @angular/material primary entry-point\n// Can be removed once the Material primary entry-point no longer\n// re-exports all secondary entry-points\nconst VERSION = new Version('10.2.3');\n\n/** @docs-private */\nexport function MATERIAL_SANITY_CHECKS_FACTORY(): SanityChecks {\n  return true;\n}\n\n/** Injection token that configures whether the Material sanity checks are enabled. */\nexport const MATERIAL_SANITY_CHECKS = new InjectionToken<SanityChecks>('mat-sanity-checks', {\n  providedIn: 'root',\n  factory: MATERIAL_SANITY_CHECKS_FACTORY,\n});\n\n/**\n * Possible sanity checks that can be enabled. If set to\n * true/false, all checks will be enabled/disabled.\n */\nexport type SanityChecks = boolean | GranularSanityChecks;\n\n/** Object that can be used to configure the sanity checks granularly. */\nexport interface GranularSanityChecks {\n  doctype: boolean;\n  theme: boolean;\n  version: boolean;\n\n  /**\n   * @deprecated No longer being used.\n   * @breaking-change 10.0.0\n   */\n  hammer: boolean;\n}\n\n/**\n * Module that captures anything that should be loaded and/or run for *all* Angular Material\n * components. This includes Bidi, etc.\n *\n * This module should be imported to each top-level component module (e.g., MatTabsModule).\n */\n@NgModule({\n  imports: [BidiModule],\n  exports: [BidiModule],\n})\nexport class MatCommonModule {\n  /** Whether we've done the global sanity checks (e.g. a theme is loaded, there is a doctype). */\n  private _hasDoneGlobalChecks = false;\n\n  /** Configured sanity checks. */\n  private _sanityChecks: SanityChecks;\n\n  /** Used to reference correct document/window */\n  protected _document?: Document;\n\n  constructor(\n      highContrastModeDetector: HighContrastModeDetector,\n      @Optional() @Inject(MATERIAL_SANITY_CHECKS) sanityChecks: any,\n      /** @breaking-change 11.0.0 make document required */\n      @Optional() @Inject(DOCUMENT) document?: any) {\n    this._document = document;\n\n    // While A11yModule also does this, we repeat it here to avoid importing A11yModule\n    // in MatCommonModule.\n    highContrastModeDetector._applyBodyHighContrastModeCssClasses();\n\n    // Note that `_sanityChecks` is typed to `any`, because AoT\n    // throws an error if we use the `SanityChecks` type directly.\n    this._sanityChecks = sanityChecks;\n\n    if (!this._hasDoneGlobalChecks) {\n      this._checkDoctypeIsDefined();\n      this._checkThemeIsPresent();\n      this._checkCdkVersionMatch();\n      this._hasDoneGlobalChecks = true;\n    }\n  }\n\n    /** Access injected document if available or fallback to global document reference */\n    private _getDocument(): Document | null {\n      const doc = this._document || document;\n      return typeof doc === 'object' && doc ? doc : null;\n    }\n\n    /** Use defaultView of injected document if available or fallback to global window reference */\n    private _getWindow(): Window | null {\n      const doc = this._getDocument();\n      const win = doc?.defaultView || window;\n      return typeof win === 'object' && win ? win : null;\n    }\n\n  /** Whether any sanity checks are enabled. */\n  private _checksAreEnabled(): boolean {\n    // TODO(crisbeto): we can't use `ngDevMode` here yet, because ViewEngine apps might not support\n    // it. Since these checks can have performance implications and they aren't tree shakeable\n    // in their current form, we can leave the `isDevMode` check in for now.\n    // tslint:disable-next-line:ban\n    return isDevMode() && !this._isTestEnv();\n  }\n\n  /** Whether the code is running in tests. */\n  private _isTestEnv() {\n    const window = this._getWindow() as any;\n    return window && (window.__karma__ || window.jasmine);\n  }\n\n  private _checkDoctypeIsDefined(): void {\n    const isEnabled = this._checksAreEnabled() &&\n      (this._sanityChecks === true || (this._sanityChecks as GranularSanityChecks).doctype);\n    const document = this._getDocument();\n\n    if (isEnabled && document && !document.doctype) {\n      console.warn(\n        'Current document does not have a doctype. This may cause ' +\n        'some Angular Material components not to behave as expected.'\n      );\n    }\n  }\n\n  private _checkThemeIsPresent(): void {\n    // We need to assert that the `body` is defined, because these checks run very early\n    // and the `body` won't be defined if the consumer put their scripts in the `head`.\n    const isDisabled = !this._checksAreEnabled() ||\n      (this._sanityChecks === false || !(this._sanityChecks as GranularSanityChecks).theme);\n    const document = this._getDocument();\n\n    if (isDisabled || !document || !document.body ||\n        typeof getComputedStyle !== 'function') {\n      return;\n    }\n\n    const testElement = document.createElement('div');\n\n    testElement.classList.add('mat-theme-loaded-marker');\n    document.body.appendChild(testElement);\n\n    const computedStyle = getComputedStyle(testElement);\n\n    // In some situations the computed style of the test element can be null. For example in\n    // Firefox, the computed style is null if an application is running inside of a hidden iframe.\n    // See: https://bugzilla.mozilla.org/show_bug.cgi?id=548397\n    if (computedStyle && computedStyle.display !== 'none') {\n      console.warn(\n        'Could not find Angular Material core theme. Most Material ' +\n        'components may not work as expected. For more info refer ' +\n        'to the theming guide: https://material.angular.io/guide/theming'\n      );\n    }\n\n    document.body.removeChild(testElement);\n  }\n\n  /** Checks whether the material version matches the cdk version */\n  private _checkCdkVersionMatch(): void {\n    const isEnabled = this._checksAreEnabled() &&\n      (this._sanityChecks === true || (this._sanityChecks as GranularSanityChecks).version);\n\n    if (isEnabled && VERSION.full !== CDK_VERSION.full) {\n      console.warn(\n          'The Angular Material version (' + VERSION.full + ') does not match ' +\n          'the Angular CDK version (' + CDK_VERSION.full + ').\\n' +\n          'Please ensure the versions of these two packages exactly match.'\n      );\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {Constructor} from './constructor';\n\n/** @docs-private */\nexport interface CanDisable {\n  /** Whether the component is disabled. */\n  disabled: boolean;\n}\n\n/** @docs-private */\nexport type CanDisableCtor = Constructor<CanDisable>;\n\n/** Mixin to augment a directive with a `disabled` property. */\nexport function mixinDisabled<T extends Constructor<{}>>(base: T): CanDisableCtor & T {\n  return class extends base {\n    private _disabled: boolean = false;\n\n    get disabled() { return this._disabled; }\n    set disabled(value: any) { this._disabled = coerceBooleanProperty(value); }\n\n    constructor(...args: any[]) { super(...args); }\n  };\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Constructor} from './constructor';\nimport {ElementRef} from '@angular/core';\n\n/** @docs-private */\nexport interface CanColor {\n  /** Theme color palette for the component. */\n  color: ThemePalette;\n\n  /** Default color to fall back to if no value is set. */\n  defaultColor: ThemePalette | undefined;\n}\n\n/** @docs-private */\nexport type CanColorCtor = Constructor<CanColor>;\n\n/** @docs-private */\nexport interface HasElementRef {\n  _elementRef: ElementRef;\n}\n\n/** Possible color palette values. */\nexport type ThemePalette = 'primary' | 'accent' | 'warn' | undefined;\n\n/** Mixin to augment a directive with a `color` property. */\nexport function mixinColor<T extends Constructor<HasElementRef>>(\n    base: T, defaultColor?: ThemePalette): CanColorCtor & T {\n  return class extends base {\n    private _color: ThemePalette;\n    defaultColor = defaultColor;\n\n    get color(): ThemePalette { return this._color; }\n    set color(value: ThemePalette) {\n      const colorPalette = value || this.defaultColor;\n\n      if (colorPalette !== this._color) {\n        if (this._color) {\n          this._elementRef.nativeElement.classList.remove(`mat-${this._color}`);\n        }\n        if (colorPalette) {\n          this._elementRef.nativeElement.classList.add(`mat-${colorPalette}`);\n        }\n\n        this._color = colorPalette;\n      }\n    }\n\n    constructor(...args: any[]) {\n      super(...args);\n\n      // Set the default color that can be specified from the mixin.\n      this.color = defaultColor;\n    }\n  };\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {Constructor, AbstractConstructor} from './constructor';\n\n/** @docs-private */\nexport interface CanDisableRipple {\n  /** Whether ripples are disabled. */\n  disableRipple: boolean;\n}\n\n/** @docs-private */\nexport type CanDisableRippleCtor = Constructor<CanDisableRipple>;\n\n/** Mixin to augment a directive with a `disableRipple` property. */\nexport function mixinDisableRipple<T extends AbstractConstructor<{}>>(\n  base: T): CanDisableRippleCtor & T {\n  abstract class Mixin extends (base as unknown as Constructor<{}>) {\n    private _disableRipple: boolean = false;\n\n    /** Whether the ripple effect is disabled or not. */\n    get disableRipple() { return this._disableRipple; }\n    set disableRipple(value: any) { this._disableRipple = coerceBooleanProperty(value); }\n\n    constructor(...args: any[]) { super(...args); }\n  }\n\n  // Since we don't directly extend from `base` with it's original types, and we instruct\n  // TypeScript that `T` actually is instantiatable through `new`, the types don't overlap.\n  // This is a limitation in TS as abstract classes cannot be typed properly dynamically.\n  return Mixin as unknown as T & CanDisableRippleCtor;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {coerceNumberProperty} from '@angular/cdk/coercion';\nimport {Constructor, AbstractConstructor} from './constructor';\nimport {CanDisable} from './disabled';\n\n\n/** @docs-private */\nexport interface HasTabIndex {\n  /** Tabindex of the component. */\n  tabIndex: number;\n\n  /** Tabindex to which to fall back to if no value is set. */\n  defaultTabIndex: number;\n}\n\n/** @docs-private */\nexport type HasTabIndexCtor = Constructor<HasTabIndex>;\n\n/** Mixin to augment a directive with a `tabIndex` property. */\nexport function mixinTabIndex<T extends AbstractConstructor<CanDisable>>(\n  base: T, defaultTabIndex = 0): HasTabIndexCtor & T {\n  // Note: We cast `base` to `unknown` and then `Constructor`. It could be an abstract class,\n  // but given we `extend` it from another class, we can assume a constructor being accessible.\n  abstract class Mixin extends (base as unknown as Constructor<CanDisable>) {\n    private _tabIndex: number = defaultTabIndex;\n    defaultTabIndex = defaultTabIndex;\n\n    get tabIndex(): number { return this.disabled ? -1 : this._tabIndex; }\n    set tabIndex(value: number) {\n      // If the specified tabIndex value is null or undefined, fall back to the default value.\n      this._tabIndex = value != null ? coerceNumberProperty(value) : this.defaultTabIndex;\n    }\n\n    constructor(...args: any[]) {\n      super(...args);\n    }\n  }\n\n  // Since we don't directly extend from `base` with it's original types, and we instruct\n  // TypeScript that `T` actually is instantiatable through `new`, the types don't overlap.\n  // This is a limitation in TS as abstract classes cannot be typed properly dynamically.\n  return Mixin as unknown as T & Constructor<HasTabIndex>;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {FormControl, FormGroupDirective, NgControl, NgForm} from '@angular/forms';\nimport {Subject} from 'rxjs';\nimport {ErrorStateMatcher} from '../error/error-options';\nimport {Constructor} from './constructor';\n\n\n/** @docs-private */\nexport interface CanUpdateErrorState {\n  updateErrorState(): void;\n  readonly stateChanges: Subject<void>;\n  errorState: boolean;\n  errorStateMatcher: ErrorStateMatcher;\n}\n\n/** @docs-private */\nexport type CanUpdateErrorStateCtor = Constructor<CanUpdateErrorState>;\n\n/** @docs-private */\nexport interface HasErrorState {\n  _parentFormGroup: FormGroupDirective;\n  _parentForm: NgForm;\n  _defaultErrorStateMatcher: ErrorStateMatcher;\n  ngControl: NgControl;\n}\n\n/**\n * Mixin to augment a directive with updateErrorState method.\n * For component with `errorState` and need to update `errorState`.\n */\nexport function mixinErrorState<T extends Constructor<HasErrorState>>(base: T)\n: CanUpdateErrorStateCtor & T {\n  return class extends base {\n    /** Whether the component is in an error state. */\n    errorState: boolean = false;\n\n    /**\n     * Stream that emits whenever the state of the input changes such that the wrapping\n     * `MatFormField` needs to run change detection.\n     */\n    readonly stateChanges = new Subject<void>();\n\n    errorStateMatcher: ErrorStateMatcher;\n\n    updateErrorState() {\n      const oldState = this.errorState;\n      const parent = this._parentFormGroup || this._parentForm;\n      const matcher = this.errorStateMatcher || this._defaultErrorStateMatcher;\n      const control = this.ngControl ? this.ngControl.control as FormControl : null;\n      const newState = matcher.isErrorState(control, parent);\n\n      if (newState !== oldState) {\n        this.errorState = newState;\n        this.stateChanges.next();\n      }\n    }\n\n    constructor(...args: any[]) {\n      super(...args);\n    }\n  };\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Observable, Subscriber} from 'rxjs';\nimport {Constructor} from './constructor';\n\n\n/**\n * Mixin that adds an initialized property to a directive which, when subscribed to, will emit a\n * value once markInitialized has been called, which should be done during the ngOnInit function.\n * If the subscription is made after it has already been marked as initialized, then it will trigger\n * an emit immediately.\n * @docs-private\n */\nexport interface HasInitialized {\n  /** Stream that emits once during the directive/component's ngOnInit. */\n  initialized: Observable<void>;\n\n  /**\n   * Sets the state as initialized and must be called during ngOnInit to notify subscribers that\n   * the directive has been initialized.\n   * @docs-private\n   */\n  _markInitialized: () => void;\n}\n\n/** @docs-private */\nexport type HasInitializedCtor = Constructor<HasInitialized>;\n\n/** Mixin to augment a directive with an initialized property that will emits when ngOnInit ends. */\nexport function mixinInitialized<T extends Constructor<{}>>(base: T):\n    HasInitializedCtor & T {\n  return class extends base {\n    /** Whether this directive has been marked as initialized. */\n    _isInitialized = false;\n\n    /**\n     * List of subscribers that subscribed before the directive was initialized. Should be notified\n     * during _markInitialized. Set to null after pending subscribers are notified, and should\n     * not expect to be populated after.\n     */\n    _pendingSubscribers: Subscriber<void>[] | null = [];\n\n    /**\n     * Observable stream that emits when the directive initializes. If already initialized, the\n     * subscriber is stored to be notified once _markInitialized is called.\n     */\n    initialized = new Observable<void>(subscriber => {\n      // If initialized, immediately notify the subscriber. Otherwise store the subscriber to notify\n      // when _markInitialized is called.\n      if (this._isInitialized) {\n        this._notifySubscriber(subscriber);\n      } else {\n        this._pendingSubscribers!.push(subscriber);\n      }\n    });\n\n    constructor(...args: any[]) { super(...args); }\n\n    /**\n     * Marks the state as initialized and notifies pending subscribers. Should be called at the end\n     * of ngOnInit.\n     * @docs-private\n     */\n    _markInitialized(): void {\n      if (this._isInitialized && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n        throw Error('This directive has already been marked as initialized and ' +\n            'should not be called twice.');\n      }\n\n      this._isInitialized = true;\n\n      this._pendingSubscribers!.forEach(this._notifySubscriber);\n      this._pendingSubscribers = null;\n    }\n\n    /** Emits and completes the subscriber stream (should only emit once). */\n    _notifySubscriber(subscriber: Subscriber<void>): void {\n      subscriber.next();\n      subscriber.complete();\n    }\n  };\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport {\n  MatCommonModule,\n  MATERIAL_SANITY_CHECKS,\n  SanityChecks,\n  GranularSanityChecks,\n} from './common-module';\nexport {CanDisable, CanDisableCtor, mixinDisabled} from './disabled';\nexport {CanColor, CanColorCtor, mixinColor, ThemePalette} from './color';\nexport {CanDisableRipple, CanDisableRippleCtor, mixinDisableRipple} from './disable-ripple';\nexport {HasTabIndex, HasTabIndexCtor, mixinTabIndex} from './tabindex';\nexport {CanUpdateErrorState, CanUpdateErrorStateCtor, mixinErrorState} from './error-state';\nexport {HasInitialized, HasInitializedCtor, mixinInitialized} from './initialized';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {inject, InjectionToken, LOCALE_ID} from '@angular/core';\nimport {Observable, Subject} from 'rxjs';\n\n/** InjectionToken for datepicker that can be used to override default locale code. */\nexport const MAT_DATE_LOCALE = new InjectionToken<string>('MAT_DATE_LOCALE', {\n  providedIn: 'root',\n  factory: MAT_DATE_LOCALE_FACTORY,\n});\n\n/** @docs-private */\nexport function MAT_DATE_LOCALE_FACTORY(): string {\n  return inject(LOCALE_ID);\n}\n\n/**\n * No longer needed since MAT_DATE_LOCALE has been changed to a scoped injectable.\n * If you are importing and providing this in your code you can simply remove it.\n * @deprecated\n * @breaking-change 8.0.0\n */\nexport const MAT_DATE_LOCALE_PROVIDER = {provide: MAT_DATE_LOCALE, useExisting: LOCALE_ID};\n\n/** Adapts type `D` to be usable as a date by cdk-based components that work with dates. */\nexport abstract class DateAdapter<D> {\n  /** The locale to use for all dates. */\n  protected locale: any;\n  protected _localeChanges = new Subject<void>();\n\n  /** A stream that emits when the locale changes. */\n  readonly localeChanges: Observable<void> = this._localeChanges;\n\n  /**\n   * Gets the year component of the given date.\n   * @param date The date to extract the year from.\n   * @returns The year component.\n   */\n  abstract getYear(date: D): number;\n\n  /**\n   * Gets the month component of the given date.\n   * @param date The date to extract the month from.\n   * @returns The month component (0-indexed, 0 = January).\n   */\n  abstract getMonth(date: D): number;\n\n  /**\n   * Gets the date of the month component of the given date.\n   * @param date The date to extract the date of the month from.\n   * @returns The month component (1-indexed, 1 = first of month).\n   */\n  abstract getDate(date: D): number;\n\n  /**\n   * Gets the day of the week component of the given date.\n   * @param date The date to extract the day of the week from.\n   * @returns The month component (0-indexed, 0 = Sunday).\n   */\n  abstract getDayOfWeek(date: D): number;\n\n  /**\n   * Gets a list of names for the months.\n   * @param style The naming style (e.g. long = 'January', short = 'Jan', narrow = 'J').\n   * @returns An ordered list of all month names, starting with January.\n   */\n  abstract getMonthNames(style: 'long' | 'short' | 'narrow'): string[];\n\n  /**\n   * Gets a list of names for the dates of the month.\n   * @returns An ordered list of all date of the month names, starting with '1'.\n   */\n  abstract getDateNames(): string[];\n\n  /**\n   * Gets a list of names for the days of the week.\n   * @param style The naming style (e.g. long = 'Sunday', short = 'Sun', narrow = 'S').\n   * @returns An ordered list of all weekday names, starting with Sunday.\n   */\n  abstract getDayOfWeekNames(style: 'long' | 'short' | 'narrow'): string[];\n\n  /**\n   * Gets the name for the year of the given date.\n   * @param date The date to get the year name for.\n   * @returns The name of the given year (e.g. '2017').\n   */\n  abstract getYearName(date: D): string;\n\n  /**\n   * Gets the first day of the week.\n   * @returns The first day of the week (0-indexed, 0 = Sunday).\n   */\n  abstract getFirstDayOfWeek(): number;\n\n  /**\n   * Gets the number of days in the month of the given date.\n   * @param date The date whose month should be checked.\n   * @returns The number of days in the month of the given date.\n   */\n  abstract getNumDaysInMonth(date: D): number;\n\n  /**\n   * Clones the given date.\n   * @param date The date to clone\n   * @returns A new date equal to the given date.\n   */\n  abstract clone(date: D): D;\n\n  /**\n   * Creates a date with the given year, month, and date. Does not allow over/under-flow of the\n   * month and date.\n   * @param year The full year of the date. (e.g. 89 means the year 89, not the year 1989).\n   * @param month The month of the date (0-indexed, 0 = January). Must be an integer 0 - 11.\n   * @param date The date of month of the date. Must be an integer 1 - length of the given month.\n   * @returns The new date, or null if invalid.\n   */\n  abstract createDate(year: number, month: number, date: number): D;\n\n  /**\n   * Gets today's date.\n   * @returns Today's date.\n   */\n  abstract today(): D;\n\n  /**\n   * Parses a date from a user-provided value.\n   * @param value The value to parse.\n   * @param parseFormat The expected format of the value being parsed\n   *     (type is implementation-dependent).\n   * @returns The parsed date.\n   */\n  abstract parse(value: any, parseFormat: any): D | null;\n\n  /**\n   * Formats a date as a string according to the given format.\n   * @param date The value to format.\n   * @param displayFormat The format to use to display the date as a string.\n   * @returns The formatted date string.\n   */\n  abstract format(date: D, displayFormat: any): string;\n\n  /**\n   * Adds the given number of years to the date. Years are counted as if flipping 12 pages on the\n   * calendar for each year and then finding the closest date in the new month. For example when\n   * adding 1 year to Feb 29, 2016, the resulting date will be Feb 28, 2017.\n   * @param date The date to add years to.\n   * @param years The number of years to add (may be negative).\n   * @returns A new date equal to the given one with the specified number of years added.\n   */\n  abstract addCalendarYears(date: D, years: number): D;\n\n  /**\n   * Adds the given number of months to the date. Months are counted as if flipping a page on the\n   * calendar for each month and then finding the closest date in the new month. For example when\n   * adding 1 month to Jan 31, 2017, the resulting date will be Feb 28, 2017.\n   * @param date The date to add months to.\n   * @param months The number of months to add (may be negative).\n   * @returns A new date equal to the given one with the specified number of months added.\n   */\n  abstract addCalendarMonths(date: D, months: number): D;\n\n  /**\n   * Adds the given number of days to the date. Days are counted as if moving one cell on the\n   * calendar for each day.\n   * @param date The date to add days to.\n   * @param days The number of days to add (may be negative).\n   * @returns A new date equal to the given one with the specified number of days added.\n   */\n  abstract addCalendarDays(date: D, days: number): D;\n\n  /**\n   * Gets the RFC 3339 compatible string (https://tools.ietf.org/html/rfc3339) for the given date.\n   * This method is used to generate date strings that are compatible with native HTML attributes\n   * such as the `min` or `max` attribute of an `<input>`.\n   * @param date The date to get the ISO date string for.\n   * @returns The ISO date string date string.\n   */\n  abstract toIso8601(date: D): string;\n\n  /**\n   * Checks whether the given object is considered a date instance by this DateAdapter.\n   * @param obj The object to check\n   * @returns Whether the object is a date instance.\n   */\n  abstract isDateInstance(obj: any): boolean;\n\n  /**\n   * Checks whether the given date is valid.\n   * @param date The date to check.\n   * @returns Whether the date is valid.\n   */\n  abstract isValid(date: D): boolean;\n\n  /**\n   * Gets date instance that is not valid.\n   * @returns An invalid date.\n   */\n  abstract invalid(): D;\n\n /**\n  * Given a potential date object, returns that same date object if it is\n  * a valid date, or `null` if it's not a valid date.\n  * @param obj The object to check.\n  * @returns A date or `null`.\n  */\n  getValidDateOrNull(obj: unknown): D | null {\n    return this.isDateInstance(obj) && this.isValid(obj as D) ? obj as D : null;\n  }\n\n  /**\n   * Attempts to deserialize a value to a valid date object. This is different from parsing in that\n   * deserialize should only accept non-ambiguous, locale-independent formats (e.g. a ISO 8601\n   * string). The default implementation does not allow any deserialization, it simply checks that\n   * the given value is already a valid date object or null. The `<mat-datepicker>` will call this\n   * method on all of its `@Input()` properties that accept dates. It is therefore possible to\n   * support passing values from your backend directly to these properties by overriding this method\n   * to also deserialize the format used by your backend.\n   * @param value The value to be deserialized into a date object.\n   * @returns The deserialized date object, either a valid date, null if the value can be\n   *     deserialized into a null date (e.g. the empty string), or an invalid date.\n   */\n  deserialize(value: any): D | null {\n    if (value == null || this.isDateInstance(value) && this.isValid(value)) {\n      return value;\n    }\n    return this.invalid();\n  }\n\n  /**\n   * Sets the locale used for all dates.\n   * @param locale The new locale.\n   */\n  setLocale(locale: any) {\n    this.locale = locale;\n    this._localeChanges.next();\n  }\n\n  /**\n   * Compares two dates.\n   * @param first The first date to compare.\n   * @param second The second date to compare.\n   * @returns 0 if the dates are equal, a number less than 0 if the first date is earlier,\n   *     a number greater than 0 if the first date is later.\n   */\n  compareDate(first: D, second: D): number {\n    return this.getYear(first) - this.getYear(second) ||\n        this.getMonth(first) - this.getMonth(second) ||\n        this.getDate(first) - this.getDate(second);\n  }\n\n  /**\n   * Checks if two dates are equal.\n   * @param first The first date to check.\n   * @param second The second date to check.\n   * @returns Whether the two dates are equal.\n   *     Null dates are considered equal to other null dates.\n   */\n  sameDate(first: D | null, second: D | null): boolean {\n    if (first && second) {\n      let firstValid = this.isValid(first);\n      let secondValid = this.isValid(second);\n      if (firstValid && secondValid) {\n        return !this.compareDate(first, second);\n      }\n      return firstValid == secondValid;\n    }\n    return first == second;\n  }\n\n  /**\n   * Clamp the given date between min and max dates.\n   * @param date The date to clamp.\n   * @param min The minimum value to allow. If null or omitted no min is enforced.\n   * @param max The maximum value to allow. If null or omitted no max is enforced.\n   * @returns `min` if `date` is less than `min`, `max` if date is greater than `max`,\n   *     otherwise `date`.\n   */\n  clampDate(date: D, min?: D | null, max?: D | null): D {\n    if (min && this.compareDate(date, min) < 0) {\n      return min;\n    }\n    if (max && this.compareDate(date, max) > 0) {\n      return max;\n    }\n    return date;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {InjectionToken} from '@angular/core';\n\n\nexport type MatDateFormats = {\n  parse: {\n    dateInput: any\n  },\n  display: {\n    dateInput: any,\n    monthYearLabel: any,\n    dateA11yLabel: any,\n    monthYearA11yLabel: any,\n  }\n};\n\n\nexport const MAT_DATE_FORMATS = new InjectionToken<MatDateFormats>('mat-date-formats');\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Platform} from '@angular/cdk/platform';\nimport {Inject, Injectable, Optional} from '@angular/core';\nimport {DateAdapter, MAT_DATE_LOCALE} from './date-adapter';\n\n// TODO(mmalerba): Remove when we no longer support safari 9.\n/** Whether the browser supports the Intl API. */\nlet SUPPORTS_INTL_API: boolean;\n\n// We need a try/catch around the reference to `Intl`, because accessing it in some cases can\n// cause IE to throw. These cases are tied to particular versions of Windows and can happen if\n// the consumer is providing a polyfilled `Map`. See:\n// https://github.com/Microsoft/ChakraCore/issues/3189\n// https://github.com/angular/components/issues/15687\ntry {\n  SUPPORTS_INTL_API = typeof Intl != 'undefined';\n} catch {\n  SUPPORTS_INTL_API = false;\n}\n\n/** The default month names to use if Intl API is not available. */\nconst DEFAULT_MONTH_NAMES = {\n  'long': [\n    'January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September',\n    'October', 'November', 'December'\n  ],\n  'short': ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],\n  'narrow': ['J', 'F', 'M', 'A', 'M', 'J', 'J', 'A', 'S', 'O', 'N', 'D']\n};\n\n\n/** The default date names to use if Intl API is not available. */\nconst DEFAULT_DATE_NAMES = range(31, i => String(i + 1));\n\n\n/** The default day of the week names to use if Intl API is not available. */\nconst DEFAULT_DAY_OF_WEEK_NAMES = {\n  'long': ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],\n  'short': ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],\n  'narrow': ['S', 'M', 'T', 'W', 'T', 'F', 'S']\n};\n\n\n/**\n * Matches strings that have the form of a valid RFC 3339 string\n * (https://tools.ietf.org/html/rfc3339). Note that the string may not actually be a valid date\n * because the regex will match strings an with out of bounds month, date, etc.\n */\nconst ISO_8601_REGEX =\n    /^\\d{4}-\\d{2}-\\d{2}(?:T\\d{2}:\\d{2}:\\d{2}(?:\\.\\d+)?(?:Z|(?:(?:\\+|-)\\d{2}:\\d{2}))?)?$/;\n\n\n/** Creates an array and fills it with values. */\nfunction range<T>(length: number, valueFunction: (index: number) => T): T[] {\n  const valuesArray = Array(length);\n  for (let i = 0; i < length; i++) {\n    valuesArray[i] = valueFunction(i);\n  }\n  return valuesArray;\n}\n\n/** Adapts the native JS Date for use with cdk-based components that work with dates. */\n@Injectable()\nexport class NativeDateAdapter extends DateAdapter<Date> {\n  /** Whether to clamp the date between 1 and 9999 to avoid IE and Edge errors. */\n  private readonly _clampDate: boolean;\n\n  /**\n   * Whether to use `timeZone: 'utc'` with `Intl.DateTimeFormat` when formatting dates.\n   * Without this `Intl.DateTimeFormat` sometimes chooses the wrong timeZone, which can throw off\n   * the result. (e.g. in the en-US locale `new Date(1800, 7, 14).toLocaleDateString()`\n   * will produce `'8/13/1800'`.\n   *\n   * TODO(mmalerba): drop this variable. It's not being used in the code right now. We're now\n   * getting the string representation of a Date object from its utc representation. We're keeping\n   * it here for sometime, just for precaution, in case we decide to revert some of these changes\n   * though.\n   */\n  useUtcForDisplay: boolean = true;\n\n  constructor(@Optional() @Inject(MAT_DATE_LOCALE) matDateLocale: string, platform: Platform) {\n    super();\n    super.setLocale(matDateLocale);\n\n    // IE does its own time zone correction, so we disable this on IE.\n    this.useUtcForDisplay = !platform.TRIDENT;\n    this._clampDate = platform.TRIDENT || platform.EDGE;\n  }\n\n  getYear(date: Date): number {\n    return date.getFullYear();\n  }\n\n  getMonth(date: Date): number {\n    return date.getMonth();\n  }\n\n  getDate(date: Date): number {\n    return date.getDate();\n  }\n\n  getDayOfWeek(date: Date): number {\n    return date.getDay();\n  }\n\n  getMonthNames(style: 'long' | 'short' | 'narrow'): string[] {\n    if (SUPPORTS_INTL_API) {\n      const dtf = new Intl.DateTimeFormat(this.locale, {month: style, timeZone: 'utc'});\n      return range(12, i =>\n          this._stripDirectionalityCharacters(this._format(dtf, new Date(2017, i, 1))));\n    }\n    return DEFAULT_MONTH_NAMES[style];\n  }\n\n  getDateNames(): string[] {\n    if (SUPPORTS_INTL_API) {\n      const dtf = new Intl.DateTimeFormat(this.locale, {day: 'numeric', timeZone: 'utc'});\n      return range(31, i => this._stripDirectionalityCharacters(\n          this._format(dtf, new Date(2017, 0, i + 1))));\n    }\n    return DEFAULT_DATE_NAMES;\n  }\n\n  getDayOfWeekNames(style: 'long' | 'short' | 'narrow'): string[] {\n    if (SUPPORTS_INTL_API) {\n      const dtf = new Intl.DateTimeFormat(this.locale, {weekday: style, timeZone: 'utc'});\n      return range(7, i => this._stripDirectionalityCharacters(\n          this._format(dtf, new Date(2017, 0, i + 1))));\n    }\n    return DEFAULT_DAY_OF_WEEK_NAMES[style];\n  }\n\n  getYearName(date: Date): string {\n    if (SUPPORTS_INTL_API) {\n      const dtf = new Intl.DateTimeFormat(this.locale, {year: 'numeric', timeZone: 'utc'});\n      return this._stripDirectionalityCharacters(this._format(dtf, date));\n    }\n    return String(this.getYear(date));\n  }\n\n  getFirstDayOfWeek(): number {\n    // We can't tell using native JS Date what the first day of the week is, we default to Sunday.\n    return 0;\n  }\n\n  getNumDaysInMonth(date: Date): number {\n    return this.getDate(this._createDateWithOverflow(\n        this.getYear(date), this.getMonth(date) + 1, 0));\n  }\n\n  clone(date: Date): Date {\n    return new Date(date.getTime());\n  }\n\n  createDate(year: number, month: number, date: number): Date {\n    if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      // Check for invalid month and date (except upper bound on date which we have to check after\n      // creating the Date).\n      if (month < 0 || month > 11) {\n        throw Error(`Invalid month index \"${month}\". Month index has to be between 0 and 11.`);\n      }\n\n      if (date < 1) {\n        throw Error(`Invalid date \"${date}\". Date has to be greater than 0.`);\n      }\n    }\n\n    let result = this._createDateWithOverflow(year, month, date);\n    // Check that the date wasn't above the upper bound for the month, causing the month to overflow\n    if (result.getMonth() != month && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw Error(`Invalid date \"${date}\" for month with index \"${month}\".`);\n    }\n\n    return result;\n  }\n\n  today(): Date {\n    return new Date();\n  }\n\n  parse(value: any): Date | null {\n    // We have no way using the native JS Date to set the parse format or locale, so we ignore these\n    // parameters.\n    if (typeof value == 'number') {\n      return new Date(value);\n    }\n    return value ? new Date(Date.parse(value)) : null;\n  }\n\n  format(date: Date, displayFormat: Object): string {\n    if (!this.isValid(date)) {\n      throw Error('NativeDateAdapter: Cannot format invalid date.');\n    }\n\n    if (SUPPORTS_INTL_API) {\n      // On IE and Edge the i18n API will throw a hard error that can crash the entire app\n      // if we attempt to format a date whose year is less than 1 or greater than 9999.\n      if (this._clampDate && (date.getFullYear() < 1 || date.getFullYear() > 9999)) {\n        date = this.clone(date);\n        date.setFullYear(Math.max(1, Math.min(9999, date.getFullYear())));\n      }\n\n      displayFormat = {...displayFormat, timeZone: 'utc'};\n\n      const dtf = new Intl.DateTimeFormat(this.locale, displayFormat);\n      return this._stripDirectionalityCharacters(this._format(dtf, date));\n    }\n    return this._stripDirectionalityCharacters(date.toDateString());\n  }\n\n  addCalendarYears(date: Date, years: number): Date {\n    return this.addCalendarMonths(date, years * 12);\n  }\n\n  addCalendarMonths(date: Date, months: number): Date {\n    let newDate = this._createDateWithOverflow(\n        this.getYear(date), this.getMonth(date) + months, this.getDate(date));\n\n    // It's possible to wind up in the wrong month if the original month has more days than the new\n    // month. In this case we want to go to the last day of the desired month.\n    // Note: the additional + 12 % 12 ensures we end up with a positive number, since JS % doesn't\n    // guarantee this.\n    if (this.getMonth(newDate) != ((this.getMonth(date) + months) % 12 + 12) % 12) {\n      newDate = this._createDateWithOverflow(this.getYear(newDate), this.getMonth(newDate), 0);\n    }\n\n    return newDate;\n  }\n\n  addCalendarDays(date: Date, days: number): Date {\n    return this._createDateWithOverflow(\n        this.getYear(date), this.getMonth(date), this.getDate(date) + days);\n  }\n\n  toIso8601(date: Date): string {\n    return [\n      date.getUTCFullYear(),\n      this._2digit(date.getUTCMonth() + 1),\n      this._2digit(date.getUTCDate())\n    ].join('-');\n  }\n\n  /**\n   * Returns the given value if given a valid Date or null. Deserializes valid ISO 8601 strings\n   * (https://www.ietf.org/rfc/rfc3339.txt) into valid Dates and empty string into null. Returns an\n   * invalid date for all other values.\n   */\n  deserialize(value: any): Date | null {\n    if (typeof value === 'string') {\n      if (!value) {\n        return null;\n      }\n      // The `Date` constructor accepts formats other than ISO 8601, so we need to make sure the\n      // string is the right format first.\n      if (ISO_8601_REGEX.test(value)) {\n        let date = new Date(value);\n        if (this.isValid(date)) {\n          return date;\n        }\n      }\n    }\n    return super.deserialize(value);\n  }\n\n  isDateInstance(obj: any) {\n    return obj instanceof Date;\n  }\n\n  isValid(date: Date) {\n    return !isNaN(date.getTime());\n  }\n\n  invalid(): Date {\n    return new Date(NaN);\n  }\n\n  /** Creates a date but allows the month and date to overflow. */\n  private _createDateWithOverflow(year: number, month: number, date: number) {\n    const result = new Date(year, month, date);\n\n    // We need to correct for the fact that JS native Date treats years in range [0, 99] as\n    // abbreviations for 19xx.\n    if (year >= 0 && year < 100) {\n      result.setFullYear(this.getYear(result) - 1900);\n    }\n    return result;\n  }\n\n  /**\n   * Pads a number to make it two digits.\n   * @param n The number to pad.\n   * @returns The padded number.\n   */\n  private _2digit(n: number) {\n    return ('00' + n).slice(-2);\n  }\n\n  /**\n   * Strip out unicode LTR and RTL characters. Edge and IE insert these into formatted dates while\n   * other browsers do not. We remove them to make output consistent and because they interfere with\n   * date parsing.\n   * @param str The string to strip direction characters from.\n   * @returns The stripped string.\n   */\n  private _stripDirectionalityCharacters(str: string) {\n    return str.replace(/[\\u200e\\u200f]/g, '');\n  }\n\n  /**\n   * When converting Date object to string, javascript built-in functions may return wrong\n   * results because it applies its internal DST rules. The DST rules around the world change\n   * very frequently, and the current valid rule is not always valid in previous years though.\n   * We work around this problem building a new Date object which has its internal UTC\n   * representation with the local date and time.\n   * @param dtf Intl.DateTimeFormat object, containg the desired string format. It must have\n   *    timeZone set to 'utc' to work fine.\n   * @param date Date from which we want to get the string representation according to dtf\n   * @returns A Date object with its UTC representation based on the passed in date info\n   */\n  private _format(dtf: Intl.DateTimeFormat, date: Date) {\n    const d = new Date(Date.UTC(\n        date.getFullYear(), date.getMonth(), date.getDate(), date.getHours(),\n        date.getMinutes(), date.getSeconds(), date.getMilliseconds()));\n    return dtf.format(d);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {MatDateFormats} from './date-formats';\n\n\nexport const MAT_NATIVE_DATE_FORMATS: MatDateFormats = {\n  parse: {\n    dateInput: null,\n  },\n  display: {\n    dateInput: {year: 'numeric', month: 'numeric', day: 'numeric'},\n    monthYearLabel: {year: 'numeric', month: 'short'},\n    dateA11yLabel: {year: 'numeric', month: 'long', day: 'numeric'},\n    monthYearA11yLabel: {year: 'numeric', month: 'long'},\n  }\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {PlatformModule} from '@angular/cdk/platform';\nimport {NgModule} from '@angular/core';\nimport {DateAdapter} from './date-adapter';\nimport {MAT_DATE_FORMATS} from './date-formats';\nimport {NativeDateAdapter} from './native-date-adapter';\nimport {MAT_NATIVE_DATE_FORMATS} from './native-date-formats';\n\nexport * from './date-adapter';\nexport * from './date-formats';\nexport * from './native-date-adapter';\nexport * from './native-date-formats';\n\n\n@NgModule({\n  imports: [PlatformModule],\n  providers: [\n    {provide: DateAdapter, useClass: NativeDateAdapter},\n  ],\n})\nexport class NativeDateModule {}\n\n\n@NgModule({\n  imports: [NativeDateModule],\n  providers: [{provide: MAT_DATE_FORMATS, useValue: MAT_NATIVE_DATE_FORMATS}],\n})\nexport class MatNativeDateModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable} from '@angular/core';\nimport {FormGroupDirective, NgForm, FormControl} from '@angular/forms';\n\n/** Error state matcher that matches when a control is invalid and dirty. */\n@Injectable()\nexport class ShowOnDirtyErrorStateMatcher implements ErrorStateMatcher {\n  isErrorState(control: FormControl | null, form: FormGroupDirective | NgForm | null): boolean {\n    return !!(control && control.invalid && (control.dirty || (form && form.submitted)));\n  }\n}\n\n/** Provider that defines how form controls behave with regards to displaying error messages. */\n@Injectable({providedIn: 'root'})\nexport class ErrorStateMatcher {\n  isErrorState(control: FormControl | null, form: FormGroupDirective | NgForm | null): boolean {\n    return !!(control && control.invalid && (control.touched || (form && form.submitted)));\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  NgModule,\n  Directive,\n  ElementRef,\n  QueryList,\n} from '@angular/core';\nimport {startWith} from 'rxjs/operators';\nimport {MatCommonModule} from '../common-behaviors/common-module';\n\n\n/**\n * Shared directive to count lines inside a text area, such as a list item.\n * Line elements can be extracted with a @ContentChildren(MatLine) query, then\n * counted by checking the query list's length.\n */\n@Directive({\n  selector: '[mat-line], [matLine]',\n  host: {'class': 'mat-line'}\n})\nexport class MatLine {}\n\n/**\n * Helper that takes a query list of lines and sets the correct class on the host.\n * @docs-private\n */\nexport function setLines(lines: QueryList<unknown>, element: ElementRef<HTMLElement>,\n                         prefix = 'mat') {\n  // Note: doesn't need to unsubscribe, because `changes`\n  // gets completed by Angular when the view is destroyed.\n  lines.changes.pipe(startWith(lines)).subscribe(({length}) => {\n    setClass(element, `${prefix}-2-line`, false);\n    setClass(element, `${prefix}-3-line`, false);\n    setClass(element, `${prefix}-multi-line`, false);\n\n    if (length === 2 || length === 3) {\n      setClass(element, `${prefix}-${length}-line`, true);\n    } else if (length > 3) {\n      setClass(element, `${prefix}-multi-line`, true);\n    }\n  });\n}\n\n/** Adds or removes a class from an element. */\nfunction setClass(element: ElementRef<HTMLElement>, className: string, isAdd: boolean): void {\n  const classList = element.nativeElement.classList;\n  isAdd ? classList.add(className) : classList.remove(className);\n}\n\n/**\n * Helper that takes a query list of lines and sets the correct class on the host.\n * @docs-private\n * @deprecated Use `setLines` instead.\n * @breaking-change 8.0.0\n */\nexport class MatLineSetter {\n  constructor(lines: QueryList<MatLine>, element: ElementRef<HTMLElement>) {\n    setLines(lines, element);\n  }\n}\n\n@NgModule({\n  imports: [MatCommonModule],\n  exports: [MatLine, MatCommonModule],\n  declarations: [MatLine],\n})\nexport class MatLineModule { }\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/** Possible states for a ripple element. */\nexport const enum RippleState {\n  FADING_IN, VISIBLE, FADING_OUT, HIDDEN\n}\n\nexport type RippleConfig = {\n  color?: string;\n  centered?: boolean;\n  radius?: number;\n  persistent?: boolean;\n  animation?: RippleAnimationConfig;\n  terminateOnPointerUp?: boolean;\n};\n\n/**\n * Interface that describes the configuration for the animation of a ripple.\n * There are two animation phases with different durations for the ripples.\n */\nexport interface RippleAnimationConfig {\n  /** Duration in milliseconds for the enter animation (expansion from point of contact). */\n  enterDuration?: number;\n  /** Duration in milliseconds for the exit animation (fade-out). */\n  exitDuration?: number;\n}\n\n/**\n * Reference to a previously launched ripple element.\n */\nexport class RippleRef {\n\n  /** Current state of the ripple. */\n  state: RippleState = RippleState.HIDDEN;\n\n  constructor(\n    private _renderer: {fadeOutRipple(ref: RippleRef): void},\n    /** Reference to the ripple HTML element. */\n    public element: HTMLElement,\n    /** Ripple configuration used for the ripple. */\n    public config: RippleConfig) {\n  }\n\n  /** Fades out the ripple element. */\n  fadeOut() {\n    this._renderer.fadeOutRipple(this);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {ElementRef, NgZone} from '@angular/core';\nimport {Platform, normalizePassiveListenerOptions} from '@angular/cdk/platform';\nimport {isFakeMousedownFromScreenReader} from '@angular/cdk/a11y';\nimport {coerceElement} from '@angular/cdk/coercion';\nimport {RippleRef, RippleState, RippleConfig} from './ripple-ref';\n\n/**\n * Interface that describes the target for launching ripples.\n * It defines the ripple configuration and disabled state for interaction ripples.\n * @docs-private\n */\nexport interface RippleTarget {\n  /** Configuration for ripples that are launched on pointer down. */\n  rippleConfig: RippleConfig;\n  /** Whether ripples on pointer down should be disabled. */\n  rippleDisabled: boolean;\n}\n\n/**\n * Default ripple animation configuration for ripples without an explicit\n * animation config specified.\n */\nexport const defaultRippleAnimationConfig = {\n  enterDuration: 450,\n  exitDuration: 400\n};\n\n/**\n * Timeout for ignoring mouse events. Mouse events will be temporary ignored after touch\n * events to avoid synthetic mouse events.\n */\nconst ignoreMouseEventsTimeout = 800;\n\n/** Options that apply to all the event listeners that are bound by the ripple renderer. */\nconst passiveEventOptions = normalizePassiveListenerOptions({passive: true});\n\n/** Events that signal that the pointer is down. */\nconst pointerDownEvents = ['mousedown', 'touchstart'];\n\n/** Events that signal that the pointer is up. */\nconst pointerUpEvents = ['mouseup', 'mouseleave', 'touchend', 'touchcancel'];\n\n/**\n * Helper service that performs DOM manipulations. Not intended to be used outside this module.\n * The constructor takes a reference to the ripple directive's host element and a map of DOM\n * event handlers to be installed on the element that triggers ripple animations.\n * This will eventually become a custom renderer once Angular support exists.\n * @docs-private\n */\nexport class RippleRenderer implements EventListenerObject {\n  /** Element where the ripples are being added to. */\n  private _containerElement: HTMLElement;\n\n  /** Element which triggers the ripple elements on mouse events. */\n  private _triggerElement: HTMLElement | null;\n\n  /** Whether the pointer is currently down or not. */\n  private _isPointerDown = false;\n\n  /** Set of currently active ripple references. */\n  private _activeRipples = new Set<RippleRef>();\n\n  /** Latest non-persistent ripple that was triggered. */\n  private _mostRecentTransientRipple: RippleRef | null;\n\n  /** Time in milliseconds when the last touchstart event happened. */\n  private _lastTouchStartEvent: number;\n\n  /** Whether pointer-up event listeners have been registered. */\n  private _pointerUpEventsRegistered = false;\n\n  /**\n   * Cached dimensions of the ripple container. Set when the first\n   * ripple is shown and cleared once no more ripples are visible.\n   */\n  private _containerRect: ClientRect | null;\n\n  constructor(private _target: RippleTarget,\n              private _ngZone: NgZone,\n              elementOrElementRef: HTMLElement | ElementRef<HTMLElement>,\n              platform: Platform) {\n\n    // Only do anything if we're on the browser.\n    if (platform.isBrowser) {\n      this._containerElement = coerceElement(elementOrElementRef);\n    }\n  }\n\n  /**\n   * Fades in a ripple at the given coordinates.\n   * @param x Coordinate within the element, along the X axis at which to start the ripple.\n   * @param y Coordinate within the element, along the Y axis at which to start the ripple.\n   * @param config Extra ripple options.\n   */\n  fadeInRipple(x: number, y: number, config: RippleConfig = {}): RippleRef {\n    const containerRect = this._containerRect =\n                          this._containerRect || this._containerElement.getBoundingClientRect();\n    const animationConfig = {...defaultRippleAnimationConfig, ...config.animation};\n\n    if (config.centered) {\n      x = containerRect.left + containerRect.width / 2;\n      y = containerRect.top + containerRect.height / 2;\n    }\n\n    const radius = config.radius || distanceToFurthestCorner(x, y, containerRect);\n    const offsetX = x - containerRect.left;\n    const offsetY = y - containerRect.top;\n    const duration = animationConfig.enterDuration;\n\n    const ripple = document.createElement('div');\n    ripple.classList.add('mat-ripple-element');\n\n    ripple.style.left = `${offsetX - radius}px`;\n    ripple.style.top = `${offsetY - radius}px`;\n    ripple.style.height = `${radius * 2}px`;\n    ripple.style.width = `${radius * 2}px`;\n\n    // If a custom color has been specified, set it as inline style. If no color is\n    // set, the default color will be applied through the ripple theme styles.\n    if (config.color != null) {\n      ripple.style.backgroundColor = config.color;\n    }\n\n    ripple.style.transitionDuration = `${duration}ms`;\n\n    this._containerElement.appendChild(ripple);\n\n    // By default the browser does not recalculate the styles of dynamically created\n    // ripple elements. This is critical because then the `scale` would not animate properly.\n    enforceStyleRecalculation(ripple);\n\n    ripple.style.transform = 'scale(1)';\n\n    // Exposed reference to the ripple that will be returned.\n    const rippleRef = new RippleRef(this, ripple, config);\n\n    rippleRef.state = RippleState.FADING_IN;\n\n    // Add the ripple reference to the list of all active ripples.\n    this._activeRipples.add(rippleRef);\n\n    if (!config.persistent) {\n      this._mostRecentTransientRipple = rippleRef;\n    }\n\n    // Wait for the ripple element to be completely faded in.\n    // Once it's faded in, the ripple can be hidden immediately if the mouse is released.\n    this._runTimeoutOutsideZone(() => {\n      const isMostRecentTransientRipple = rippleRef === this._mostRecentTransientRipple;\n\n      rippleRef.state = RippleState.VISIBLE;\n\n      // When the timer runs out while the user has kept their pointer down, we want to\n      // keep only the persistent ripples and the latest transient ripple. We do this,\n      // because we don't want stacked transient ripples to appear after their enter\n      // animation has finished.\n      if (!config.persistent && (!isMostRecentTransientRipple || !this._isPointerDown)) {\n        rippleRef.fadeOut();\n      }\n    }, duration);\n\n    return rippleRef;\n  }\n\n  /** Fades out a ripple reference. */\n  fadeOutRipple(rippleRef: RippleRef) {\n    const wasActive = this._activeRipples.delete(rippleRef);\n\n    if (rippleRef === this._mostRecentTransientRipple) {\n      this._mostRecentTransientRipple = null;\n    }\n\n    // Clear out the cached bounding rect if we have no more ripples.\n    if (!this._activeRipples.size) {\n      this._containerRect = null;\n    }\n\n    // For ripples that are not active anymore, don't re-run the fade-out animation.\n    if (!wasActive) {\n      return;\n    }\n\n    const rippleEl = rippleRef.element;\n    const animationConfig = {...defaultRippleAnimationConfig, ...rippleRef.config.animation};\n\n    rippleEl.style.transitionDuration = `${animationConfig.exitDuration}ms`;\n    rippleEl.style.opacity = '0';\n    rippleRef.state = RippleState.FADING_OUT;\n\n    // Once the ripple faded out, the ripple can be safely removed from the DOM.\n    this._runTimeoutOutsideZone(() => {\n      rippleRef.state = RippleState.HIDDEN;\n      rippleEl.parentNode!.removeChild(rippleEl);\n    }, animationConfig.exitDuration);\n  }\n\n  /** Fades out all currently active ripples. */\n  fadeOutAll() {\n    this._activeRipples.forEach(ripple => ripple.fadeOut());\n  }\n\n  /** Sets up the trigger event listeners */\n  setupTriggerEvents(elementOrElementRef: HTMLElement | ElementRef<HTMLElement>) {\n    const element = coerceElement(elementOrElementRef);\n\n    if (!element || element === this._triggerElement) {\n      return;\n    }\n\n    // Remove all previously registered event listeners from the trigger element.\n    this._removeTriggerEvents();\n\n    this._triggerElement = element;\n    this._registerEvents(pointerDownEvents);\n  }\n\n  /**\n   * Handles all registered events.\n   * @docs-private\n   */\n  handleEvent(event: Event) {\n    if (event.type === 'mousedown') {\n      this._onMousedown(event as MouseEvent);\n    } else if (event.type === 'touchstart') {\n      this._onTouchStart(event as TouchEvent);\n    } else {\n      this._onPointerUp();\n    }\n\n    // If pointer-up events haven't been registered yet, do so now.\n    // We do this on-demand in order to reduce the total number of event listeners\n    // registered by the ripples, which speeds up the rendering time for large UIs.\n    if (!this._pointerUpEventsRegistered) {\n      this._registerEvents(pointerUpEvents);\n      this._pointerUpEventsRegistered = true;\n    }\n  }\n\n  /** Function being called whenever the trigger is being pressed using mouse. */\n  private _onMousedown(event: MouseEvent) {\n    // Screen readers will fire fake mouse events for space/enter. Skip launching a\n    // ripple in this case for consistency with the non-screen-reader experience.\n    const isFakeMousedown = isFakeMousedownFromScreenReader(event);\n    const isSyntheticEvent = this._lastTouchStartEvent &&\n        Date.now() < this._lastTouchStartEvent + ignoreMouseEventsTimeout;\n\n    if (!this._target.rippleDisabled && !isFakeMousedown && !isSyntheticEvent) {\n      this._isPointerDown = true;\n      this.fadeInRipple(event.clientX, event.clientY, this._target.rippleConfig);\n    }\n  }\n\n  /** Function being called whenever the trigger is being pressed using touch. */\n  private _onTouchStart(event: TouchEvent) {\n    if (!this._target.rippleDisabled) {\n      // Some browsers fire mouse events after a `touchstart` event. Those synthetic mouse\n      // events will launch a second ripple if we don't ignore mouse events for a specific\n      // time after a touchstart event.\n      this._lastTouchStartEvent = Date.now();\n      this._isPointerDown = true;\n\n      // Use `changedTouches` so we skip any touches where the user put\n      // their finger down, but used another finger to tap the element again.\n      const touches = event.changedTouches;\n\n      for (let i = 0; i < touches.length; i++) {\n        this.fadeInRipple(touches[i].clientX, touches[i].clientY, this._target.rippleConfig);\n      }\n    }\n  }\n\n  /** Function being called whenever the trigger is being released. */\n  private _onPointerUp() {\n    if (!this._isPointerDown) {\n      return;\n    }\n\n    this._isPointerDown = false;\n\n    // Fade-out all ripples that are visible and not persistent.\n    this._activeRipples.forEach(ripple => {\n      // By default, only ripples that are completely visible will fade out on pointer release.\n      // If the `terminateOnPointerUp` option is set, ripples that still fade in will also fade out.\n      const isVisible = ripple.state === RippleState.VISIBLE ||\n        ripple.config.terminateOnPointerUp && ripple.state === RippleState.FADING_IN;\n\n      if (!ripple.config.persistent && isVisible) {\n        ripple.fadeOut();\n      }\n    });\n  }\n\n  /** Runs a timeout outside of the Angular zone to avoid triggering the change detection. */\n  private _runTimeoutOutsideZone(fn: Function, delay = 0) {\n    this._ngZone.runOutsideAngular(() => setTimeout(fn, delay));\n  }\n\n  /** Registers event listeners for a given list of events. */\n  private _registerEvents(eventTypes: string[]) {\n    this._ngZone.runOutsideAngular(() => {\n      eventTypes.forEach((type) => {\n        this._triggerElement!.addEventListener(type, this, passiveEventOptions);\n      });\n    });\n  }\n\n  /** Removes previously registered event listeners from the trigger element. */\n  _removeTriggerEvents() {\n    if (this._triggerElement) {\n      pointerDownEvents.forEach((type) => {\n        this._triggerElement!.removeEventListener(type, this, passiveEventOptions);\n      });\n\n      if (this._pointerUpEventsRegistered) {\n        pointerUpEvents.forEach((type) => {\n          this._triggerElement!.removeEventListener(type, this, passiveEventOptions);\n        });\n      }\n    }\n  }\n}\n\n/** Enforces a style recalculation of a DOM element by computing its styles. */\nfunction enforceStyleRecalculation(element: HTMLElement) {\n  // Enforce a style recalculation by calling `getComputedStyle` and accessing any property.\n  // Calling `getPropertyValue` is important to let optimizers know that this is not a noop.\n  // See: https://gist.github.com/paulirish/5d52fb081b3570c81e3a\n  window.getComputedStyle(element).getPropertyValue('opacity');\n}\n\n/**\n * Returns the distance from the point (x, y) to the furthest corner of a rectangle.\n */\nfunction distanceToFurthestCorner(x: number, y: number, rect: ClientRect) {\n  const distX = Math.max(Math.abs(x - rect.left), Math.abs(x - rect.right));\n  const distY = Math.max(Math.abs(y - rect.top), Math.abs(y - rect.bottom));\n  return Math.sqrt(distX * distX + distY * distY);\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Platform} from '@angular/cdk/platform';\nimport {\n  Directive,\n  ElementRef,\n  Inject,\n  InjectionToken,\n  Input,\n  NgZone,\n  OnDestroy,\n  OnInit,\n  Optional,\n} from '@angular/core';\nimport {RippleAnimationConfig, RippleConfig, RippleRef} from './ripple-ref';\nimport {RippleRenderer, RippleTarget} from './ripple-renderer';\nimport {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';\n\n/** Configurable options for `matRipple`. */\nexport interface RippleGlobalOptions {\n  /**\n   * Whether ripples should be disabled. Ripples can be still launched manually by using\n   * the `launch()` method. Therefore focus indicators will still show up.\n   */\n  disabled?: boolean;\n\n  /**\n   * Configuration for the animation duration of the ripples. There are two phases with different\n   * durations for the ripples. The animation durations will be overwritten if the\n   * `NoopAnimationsModule` is being used.\n   */\n  animation?: RippleAnimationConfig;\n\n  /**\n   * Whether ripples should start fading out immediately after the mouse or touch is released. By\n   * default, ripples will wait for the enter animation to complete and for mouse or touch release.\n   */\n  terminateOnPointerUp?: boolean;\n}\n\n/** Injection token that can be used to specify the global ripple options. */\nexport const MAT_RIPPLE_GLOBAL_OPTIONS =\n    new InjectionToken<RippleGlobalOptions>('mat-ripple-global-options');\n\n@Directive({\n  selector: '[mat-ripple], [matRipple]',\n  exportAs: 'matRipple',\n  host: {\n    'class': 'mat-ripple',\n    '[class.mat-ripple-unbounded]': 'unbounded'\n  }\n})\nexport class MatRipple implements OnInit, OnDestroy, RippleTarget {\n\n  /** Custom color for all ripples. */\n  @Input('matRippleColor') color: string;\n\n  /** Whether the ripples should be visible outside the component's bounds. */\n  @Input('matRippleUnbounded') unbounded: boolean;\n\n  /**\n   * Whether the ripple always originates from the center of the host element's bounds, rather\n   * than originating from the location of the click event.\n   */\n  @Input('matRippleCentered') centered: boolean;\n\n  /**\n   * If set, the radius in pixels of foreground ripples when fully expanded. If unset, the radius\n   * will be the distance from the center of the ripple to the furthest corner of the host element's\n   * bounding rectangle.\n   */\n  @Input('matRippleRadius') radius: number = 0;\n\n  /**\n   * Configuration for the ripple animation. Allows modifying the enter and exit animation\n   * duration of the ripples. The animation durations will be overwritten if the\n   * `NoopAnimationsModule` is being used.\n   */\n  @Input('matRippleAnimation') animation: RippleAnimationConfig;\n\n  /**\n   * Whether click events will not trigger the ripple. Ripples can be still launched manually\n   * by using the `launch()` method.\n   */\n  @Input('matRippleDisabled')\n  get disabled() { return this._disabled; }\n  set disabled(value: boolean) {\n    this._disabled = value;\n    this._setupTriggerEventsIfEnabled();\n  }\n  private _disabled: boolean = false;\n\n  /**\n   * The element that triggers the ripple when click events are received.\n   * Defaults to the directive's host element.\n   */\n  @Input('matRippleTrigger')\n  get trigger() { return this._trigger || this._elementRef.nativeElement; }\n  set trigger(trigger: HTMLElement) {\n    this._trigger = trigger;\n    this._setupTriggerEventsIfEnabled();\n  }\n  private _trigger: HTMLElement;\n\n  /** Renderer for the ripple DOM manipulations. */\n  private _rippleRenderer: RippleRenderer;\n\n  /** Options that are set globally for all ripples. */\n  private _globalOptions: RippleGlobalOptions;\n\n  /** Whether ripple directive is initialized and the input bindings are set. */\n  private _isInitialized: boolean = false;\n\n  constructor(private _elementRef: ElementRef<HTMLElement>,\n              ngZone: NgZone,\n              platform: Platform,\n              @Optional() @Inject(MAT_RIPPLE_GLOBAL_OPTIONS) globalOptions?: RippleGlobalOptions,\n              @Optional() @Inject(ANIMATION_MODULE_TYPE) private _animationMode?: string) {\n\n    this._globalOptions = globalOptions || {};\n    this._rippleRenderer = new RippleRenderer(this, ngZone, _elementRef, platform);\n  }\n\n  ngOnInit() {\n    this._isInitialized = true;\n    this._setupTriggerEventsIfEnabled();\n  }\n\n  ngOnDestroy() {\n    this._rippleRenderer._removeTriggerEvents();\n  }\n\n  /** Fades out all currently showing ripple elements. */\n  fadeOutAll() {\n    this._rippleRenderer.fadeOutAll();\n  }\n\n  /**\n   * Ripple configuration from the directive's input values.\n   * @docs-private Implemented as part of RippleTarget\n   */\n  get rippleConfig(): RippleConfig {\n    return {\n      centered: this.centered,\n      radius: this.radius,\n      color: this.color,\n      animation: {\n        ...this._globalOptions.animation,\n        ...(this._animationMode === 'NoopAnimations' ? {enterDuration: 0, exitDuration: 0} : {}),\n        ...this.animation\n      },\n      terminateOnPointerUp: this._globalOptions.terminateOnPointerUp,\n    };\n  }\n\n  /**\n   * Whether ripples on pointer-down are disabled or not.\n   * @docs-private Implemented as part of RippleTarget\n   */\n  get rippleDisabled(): boolean {\n    return this.disabled || !!this._globalOptions.disabled;\n  }\n\n  /** Sets up the trigger event listeners if ripples are enabled. */\n  private _setupTriggerEventsIfEnabled() {\n    if (!this.disabled && this._isInitialized) {\n      this._rippleRenderer.setupTriggerEvents(this.trigger);\n    }\n  }\n\n  /**\n   * Launches a manual ripple using the specified ripple configuration.\n   * @param config Configuration for the manual ripple.\n   */\n  launch(config: RippleConfig): RippleRef;\n\n  /**\n   * Launches a manual ripple at the specified coordinates within the element.\n   * @param x Coordinate within the element, along the X axis at which to fade-in the ripple.\n   * @param y Coordinate within the element, along the Y axis at which to fade-in the ripple.\n   * @param config Optional ripple configuration for the manual ripple.\n   */\n  launch(x: number, y: number, config?: RippleConfig): RippleRef;\n\n  /** Launches a manual ripple at the specified coordinated or just by the ripple config. */\n  launch(configOrX: number | RippleConfig, y: number = 0, config?: RippleConfig): RippleRef {\n    if (typeof configOrX === 'number') {\n      return this._rippleRenderer.fadeInRipple(configOrX, y, {...this.rippleConfig, ...config});\n    } else {\n      return this._rippleRenderer.fadeInRipple(0, 0, {...this.rippleConfig, ...configOrX});\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgModule} from '@angular/core';\nimport {PlatformModule} from '@angular/cdk/platform';\nimport {MatCommonModule} from '../common-behaviors/common-module';\nimport {MatRipple} from './ripple';\n\nexport * from './ripple';\nexport * from './ripple-ref';\nexport * from './ripple-renderer';\n\n@NgModule({\n  imports: [MatCommonModule, PlatformModule],\n  exports: [MatRipple, MatCommonModule],\n  declarations: [MatRipple],\n})\nexport class MatRippleModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  Component,\n  ViewEncapsulation,\n  Input,\n  ChangeDetectionStrategy,\n  Inject,\n  Optional,\n} from '@angular/core';\nimport {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';\n\n/**\n * Possible states for a pseudo checkbox.\n * @docs-private\n */\nexport type MatPseudoCheckboxState = 'unchecked' | 'checked' | 'indeterminate';\n\n/**\n * Component that shows a simplified checkbox without including any kind of \"real\" checkbox.\n * Meant to be used when the checkbox is purely decorative and a large number of them will be\n * included, such as for the options in a multi-select. Uses no SVGs or complex animations.\n * Note that theming is meant to be handled by the parent element, e.g.\n * `mat-primary .mat-pseudo-checkbox`.\n *\n * Note that this component will be completely invisible to screen-reader users. This is *not*\n * interchangeable with `<mat-checkbox>` and should *not* be used if the user would directly\n * interact with the checkbox. The pseudo-checkbox should only be used as an implementation detail\n * of more complex components that appropriately handle selected / checked state.\n * @docs-private\n */\n@Component({\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  selector: 'mat-pseudo-checkbox',\n  styleUrls: ['pseudo-checkbox.css'],\n  template: '',\n  host: {\n    'class': 'mat-pseudo-checkbox',\n    '[class.mat-pseudo-checkbox-indeterminate]': 'state === \"indeterminate\"',\n    '[class.mat-pseudo-checkbox-checked]': 'state === \"checked\"',\n    '[class.mat-pseudo-checkbox-disabled]': 'disabled',\n    '[class._mat-animation-noopable]': '_animationMode === \"NoopAnimations\"',\n  },\n})\nexport class MatPseudoCheckbox {\n  /** Display state of the checkbox. */\n  @Input() state: MatPseudoCheckboxState = 'unchecked';\n\n  /** Whether the checkbox is disabled. */\n  @Input() disabled: boolean = false;\n\n  constructor(@Optional() @Inject(ANIMATION_MODULE_TYPE) public _animationMode?: string) { }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgModule} from '@angular/core';\nimport {MatPseudoCheckbox} from './pseudo-checkbox/pseudo-checkbox';\n\n\n@NgModule({\n  exports: [MatPseudoCheckbox],\n  declarations: [MatPseudoCheckbox]\n})\nexport class MatPseudoCheckboxModule { }\n\n\nexport * from './pseudo-checkbox/pseudo-checkbox';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {BooleanInput} from '@angular/cdk/coercion';\nimport {\n  ChangeDetectionStrategy,\n  Component,\n  InjectionToken,\n  Input,\n  ViewEncapsulation,\n  Directive\n} from '@angular/core';\nimport {CanDisable, CanDisableCtor, mixinDisabled} from '../common-behaviors/disabled';\n\n\n// Boilerplate for applying mixins to MatOptgroup.\n/** @docs-private */\nclass MatOptgroupBase { }\nconst _MatOptgroupMixinBase: CanDisableCtor & typeof MatOptgroupBase =\n    mixinDisabled(MatOptgroupBase);\n\n// Counter for unique group ids.\nlet _uniqueOptgroupIdCounter = 0;\n\n@Directive()\nexport class _MatOptgroupBase extends _MatOptgroupMixinBase implements CanDisable {\n  /** Label for the option group. */\n  @Input() label: string;\n\n  /** Unique id for the underlying label. */\n  _labelId: string = `mat-optgroup-label-${_uniqueOptgroupIdCounter++}`;\n\n  static ngAcceptInputType_disabled: BooleanInput;\n}\n\n/**\n * Injection token that can be used to reference instances of `MatOptgroup`. It serves as\n * alternative token to the actual `MatOptgroup` class which could cause unnecessary\n * retention of the class and its component metadata.\n */\nexport const MAT_OPTGROUP = new InjectionToken<MatOptgroup>('MatOptgroup');\n\n/**\n * Component that is used to group instances of `mat-option`.\n */\n@Component({\n  selector: 'mat-optgroup',\n  exportAs: 'matOptgroup',\n  templateUrl: 'optgroup.html',\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  inputs: ['disabled'],\n  styleUrls: ['optgroup.css'],\n  host: {\n    'class': 'mat-optgroup',\n    'role': 'group',\n    '[class.mat-optgroup-disabled]': 'disabled',\n    '[attr.aria-disabled]': 'disabled.toString()',\n    '[attr.aria-labelledby]': '_labelId',\n  },\n  providers: [{provide: MAT_OPTGROUP, useExisting: MatOptgroup}],\n})\nexport class MatOptgroup extends _MatOptgroupBase {\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {ENTER, SPACE, hasModifierKey} from '@angular/cdk/keycodes';\nimport {\n  AfterViewChecked,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ElementRef,\n  EventEmitter,\n  Inject,\n  InjectionToken,\n  Input,\n  OnDestroy,\n  Optional,\n  Output,\n  QueryList,\n  ViewEncapsulation,\n  Directive,\n} from '@angular/core';\nimport {FocusOptions, FocusableOption, FocusOrigin} from '@angular/cdk/a11y';\nimport {Subject} from 'rxjs';\nimport {MatOptgroup, _MatOptgroupBase, MAT_OPTGROUP} from './optgroup';\n\n/**\n * Option IDs need to be unique across components, so this counter exists outside of\n * the component definition.\n */\nlet _uniqueIdCounter = 0;\n\n/** Event object emitted by MatOption when selected or deselected. */\nexport class MatOptionSelectionChange {\n  constructor(\n    /** Reference to the option that emitted the event. */\n    public source: MatOption,\n    /** Whether the change in the option's value was a result of a user action. */\n    public isUserInput = false) { }\n}\n\n/**\n * Describes a parent component that manages a list of options.\n * Contains properties that the options can inherit.\n * @docs-private\n */\nexport interface MatOptionParentComponent {\n  disableRipple?: boolean;\n  multiple?: boolean;\n}\n\n/**\n * Injection token used to provide the parent component to options.\n */\nexport const MAT_OPTION_PARENT_COMPONENT =\n    new InjectionToken<MatOptionParentComponent>('MAT_OPTION_PARENT_COMPONENT');\n\n\n@Directive()\nexport class _MatOptionBase implements FocusableOption, AfterViewChecked, OnDestroy {\n  private _selected = false;\n  private _active = false;\n  private _disabled = false;\n  private _mostRecentViewValue = '';\n\n  /** Whether the wrapping component is in multiple selection mode. */\n  get multiple() { return this._parent && this._parent.multiple; }\n\n  /** Whether or not the option is currently selected. */\n  get selected(): boolean { return this._selected; }\n\n  /** The form value of the option. */\n  @Input() value: any;\n\n  /** The unique ID of the option. */\n  @Input() id: string = `mat-option-${_uniqueIdCounter++}`;\n\n  /** Whether the option is disabled. */\n  @Input()\n  get disabled() { return (this.group && this.group.disabled) || this._disabled; }\n  set disabled(value: any) { this._disabled = coerceBooleanProperty(value); }\n\n  /** Whether ripples for the option are disabled. */\n  get disableRipple() { return this._parent && this._parent.disableRipple; }\n\n  /** Event emitted when the option is selected or deselected. */\n  // tslint:disable-next-line:no-output-on-prefix\n  @Output() readonly onSelectionChange = new EventEmitter<MatOptionSelectionChange>();\n\n  /** Emits when the state of the option changes and any parents have to be notified. */\n  readonly _stateChanges = new Subject<void>();\n\n  constructor(\n    private _element: ElementRef<HTMLElement>,\n    private _changeDetectorRef: ChangeDetectorRef,\n    private _parent: MatOptionParentComponent,\n    readonly group: _MatOptgroupBase) {}\n\n  /**\n   * Whether or not the option is currently active and ready to be selected.\n   * An active option displays styles as if it is focused, but the\n   * focus is actually retained somewhere else. This comes in handy\n   * for components like autocomplete where focus must remain on the input.\n   */\n  get active(): boolean {\n    return this._active;\n  }\n\n  /**\n   * The displayed value of the option. It is necessary to show the selected option in the\n   * select's trigger.\n   */\n  get viewValue(): string {\n    // TODO(kara): Add input property alternative for node envs.\n    return (this._getHostElement().textContent || '').trim();\n  }\n\n  /** Selects the option. */\n  select(): void {\n    if (!this._selected) {\n      this._selected = true;\n      this._changeDetectorRef.markForCheck();\n      this._emitSelectionChangeEvent();\n    }\n  }\n\n  /** Deselects the option. */\n  deselect(): void {\n    if (this._selected) {\n      this._selected = false;\n      this._changeDetectorRef.markForCheck();\n      this._emitSelectionChangeEvent();\n    }\n  }\n\n  /** Sets focus onto this option. */\n  focus(_origin?: FocusOrigin, options?: FocusOptions): void {\n    // Note that we aren't using `_origin`, but we need to keep it because some internal consumers\n    // use `MatOption` in a `FocusKeyManager` and we need it to match `FocusableOption`.\n    const element = this._getHostElement();\n\n    if (typeof element.focus === 'function') {\n      element.focus(options);\n    }\n  }\n\n  /**\n   * This method sets display styles on the option to make it appear\n   * active. This is used by the ActiveDescendantKeyManager so key\n   * events will display the proper options as active on arrow key events.\n   */\n  setActiveStyles(): void {\n    if (!this._active) {\n      this._active = true;\n      this._changeDetectorRef.markForCheck();\n    }\n  }\n\n  /**\n   * This method removes display styles on the option that made it appear\n   * active. This is used by the ActiveDescendantKeyManager so key\n   * events will display the proper options as active on arrow key events.\n   */\n  setInactiveStyles(): void {\n    if (this._active) {\n      this._active = false;\n      this._changeDetectorRef.markForCheck();\n    }\n  }\n\n  /** Gets the label to be used when determining whether the option should be focused. */\n  getLabel(): string {\n    return this.viewValue;\n  }\n\n  /** Ensures the option is selected when activated from the keyboard. */\n  _handleKeydown(event: KeyboardEvent): void {\n    if ((event.keyCode === ENTER || event.keyCode === SPACE) && !hasModifierKey(event)) {\n      this._selectViaInteraction();\n\n      // Prevent the page from scrolling down and form submits.\n      event.preventDefault();\n    }\n  }\n\n  /**\n   * `Selects the option while indicating the selection came from the user. Used to\n   * determine if the select's view -> model callback should be invoked.`\n   */\n  _selectViaInteraction(): void {\n    if (!this.disabled) {\n      this._selected = this.multiple ? !this._selected : true;\n      this._changeDetectorRef.markForCheck();\n      this._emitSelectionChangeEvent(true);\n    }\n  }\n\n  /**\n   * Gets the `aria-selected` value for the option. We explicitly omit the `aria-selected`\n   * attribute from single-selection, unselected options. Including the `aria-selected=\"false\"`\n   * attributes adds a significant amount of noise to screen-reader users without providing useful\n   * information.\n   */\n  _getAriaSelected(): boolean|null {\n    return this.selected || (this.multiple ? false : null);\n  }\n\n  /** Returns the correct tabindex for the option depending on disabled state. */\n  _getTabIndex(): string {\n    return this.disabled ? '-1' : '0';\n  }\n\n  /** Gets the host DOM element. */\n  _getHostElement(): HTMLElement {\n    return this._element.nativeElement;\n  }\n\n  ngAfterViewChecked() {\n    // Since parent components could be using the option's label to display the selected values\n    // (e.g. `mat-select`) and they don't have a way of knowing if the option's label has changed\n    // we have to check for changes in the DOM ourselves and dispatch an event. These checks are\n    // relatively cheap, however we still limit them only to selected options in order to avoid\n    // hitting the DOM too often.\n    if (this._selected) {\n      const viewValue = this.viewValue;\n\n      if (viewValue !== this._mostRecentViewValue) {\n        this._mostRecentViewValue = viewValue;\n        this._stateChanges.next();\n      }\n    }\n  }\n\n  ngOnDestroy() {\n    this._stateChanges.complete();\n  }\n\n  /** Emits the selection change event. */\n  private _emitSelectionChangeEvent(isUserInput = false): void {\n    this.onSelectionChange.emit(new MatOptionSelectionChange(this, isUserInput));\n  }\n\n  static ngAcceptInputType_disabled: BooleanInput;\n}\n\n/**\n * Single option inside of a `<mat-select>` element.\n */\n@Component({\n  selector: 'mat-option',\n  exportAs: 'matOption',\n  host: {\n    'role': 'option',\n    '[attr.tabindex]': '_getTabIndex()',\n    '[class.mat-selected]': 'selected',\n    '[class.mat-option-multiple]': 'multiple',\n    '[class.mat-active]': 'active',\n    '[id]': 'id',\n    '[attr.aria-selected]': '_getAriaSelected()',\n    '[attr.aria-disabled]': 'disabled.toString()',\n    '[class.mat-option-disabled]': 'disabled',\n    '(click)': '_selectViaInteraction()',\n    '(keydown)': '_handleKeydown($event)',\n    'class': 'mat-option mat-focus-indicator',\n  },\n  styleUrls: ['option.css'],\n  templateUrl: 'option.html',\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n})\nexport class MatOption extends _MatOptionBase {\n  constructor(\n    element: ElementRef<HTMLElement>,\n    changeDetectorRef: ChangeDetectorRef,\n    @Optional() @Inject(MAT_OPTION_PARENT_COMPONENT) parent: MatOptionParentComponent,\n    @Optional() @Inject(MAT_OPTGROUP) group: MatOptgroup) {\n    super(element, changeDetectorRef, parent, group);\n  }\n}\n\n/**\n * Counts the amount of option group labels that precede the specified option.\n * @param optionIndex Index of the option at which to start counting.\n * @param options Flat list of all of the options.\n * @param optionGroups Flat list of all of the option groups.\n * @docs-private\n */\nexport function _countGroupLabelsBeforeOption(optionIndex: number, options: QueryList<MatOption>,\n  optionGroups: QueryList<MatOptgroup>): number {\n\n  if (optionGroups.length) {\n    let optionsArray = options.toArray();\n    let groups = optionGroups.toArray();\n    let groupCounter = 0;\n\n    for (let i = 0; i < optionIndex + 1; i++) {\n      if (optionsArray[i].group && optionsArray[i].group === groups[groupCounter]) {\n        groupCounter++;\n      }\n    }\n\n    return groupCounter;\n  }\n\n  return 0;\n}\n\n/**\n * Determines the position to which to scroll a panel in order for an option to be into view.\n * @param optionOffset Offset of the option from the top of the panel.\n * @param optionHeight Height of the options.\n * @param currentScrollPosition Current scroll position of the panel.\n * @param panelHeight Height of the panel.\n * @docs-private\n */\nexport function _getOptionScrollPosition(optionOffset: number, optionHeight: number,\n    currentScrollPosition: number, panelHeight: number): number {\n  if (optionOffset < currentScrollPosition) {\n    return optionOffset;\n  }\n\n  if (optionOffset + optionHeight > currentScrollPosition + panelHeight) {\n    return Math.max(0, optionOffset - panelHeight + optionHeight);\n  }\n\n  return currentScrollPosition;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgModule} from '@angular/core';\nimport {CommonModule} from '@angular/common';\nimport {MatRippleModule} from '../ripple/index';\nimport {MatPseudoCheckboxModule} from '../selection/index';\nimport {MatOption} from './option';\nimport {MatOptgroup} from './optgroup';\n\n\n@NgModule({\n  imports: [MatRippleModule, CommonModule, MatPseudoCheckboxModule],\n  exports: [MatOption, MatOptgroup],\n  declarations: [MatOption, MatOptgroup]\n})\nexport class MatOptionModule {}\n\n\nexport * from './option';\nexport * from './optgroup';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {InjectionToken} from '@angular/core';\n\n/**\n * InjectionToken that can be used to specify the global label options.\n * @deprecated Use `MAT_FORM_FIELD_DEFAULT_OPTIONS` injection token from\n *     `@angular/material/form-field` instead.\n * @breaking-change 11.0.0\n */\nexport const MAT_LABEL_GLOBAL_OPTIONS =\n  new InjectionToken<LabelOptions>('mat-label-global-options');\n\n/**\n * Type for the available floatLabel values.\n * @deprecated Use `FloatLabelType` from `@angular/material/form-field` instead.\n * @breaking-change 11.0.0\n */\nexport type FloatLabelType = 'always' | 'never' | 'auto';\n\n/**\n * Configurable options for floating labels.\n * @deprecated Use `MatFormFieldDefaultOptions` from `@angular/material/form-field` instead.\n * @breaking-change 11.0.0\n */\nexport interface LabelOptions {\n  /**\n   * Whether the label should float `always`, `never`, or `auto` (only when necessary).\n   * Default behavior is assumed to be `auto`.\n   */\n  float?: FloatLabelType;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * When constructing a Date, the month is zero-based. This can be confusing, since people are\n * used to seeing them one-based. So we create these aliases to make writing the tests easier.\n * @docs-private\n * @breaking-change 8.0.0 Remove this with V8 since it was only targeted for testing.\n */\nexport const JAN = 0, FEB = 1, MAR = 2, APR = 3, MAY = 4, JUN = 5, JUL = 6, AUG = 7, SEP = 8,\n  OCT = 9, NOV = 10, DEC = 11;\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './version';\nexport * from './animation/animation';\nexport * from './common-behaviors/index';\nexport * from './datetime/index';\nexport * from './error/error-options';\nexport * from './line/line';\nexport * from './option/index';\nexport * from './label/label-options';\nexport * from './ripple/index';\nexport * from './selection/index';\n\n// TODO(devversion): remove this with v8\nexport * from './month-constants';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n\nexport {MATERIAL_SANITY_CHECKS_FACTORY as ɵangular_material_src_material_core_core_a} from './common-behaviors/common-module';","import { SimpleOuterSubscriber, innerSubscribe, SimpleInnerSubscriber } from '../innerSubscribe';\nexport function expand(project, concurrent = Number.POSITIVE_INFINITY, scheduler) {\n    concurrent = (concurrent || 0) < 1 ? Number.POSITIVE_INFINITY : concurrent;\n    return (source) => source.lift(new ExpandOperator(project, concurrent, scheduler));\n}\nexport class ExpandOperator {\n    constructor(project, concurrent, scheduler) {\n        this.project = project;\n        this.concurrent = concurrent;\n        this.scheduler = scheduler;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new ExpandSubscriber(subscriber, this.project, this.concurrent, this.scheduler));\n    }\n}\nexport class ExpandSubscriber extends SimpleOuterSubscriber {\n    constructor(destination, project, concurrent, scheduler) {\n        super(destination);\n        this.project = project;\n        this.concurrent = concurrent;\n        this.scheduler = scheduler;\n        this.index = 0;\n        this.active = 0;\n        this.hasCompleted = false;\n        if (concurrent < Number.POSITIVE_INFINITY) {\n            this.buffer = [];\n        }\n    }\n    static dispatch(arg) {\n        const { subscriber, result, value, index } = arg;\n        subscriber.subscribeToProjection(result, value, index);\n    }\n    _next(value) {\n        const destination = this.destination;\n        if (destination.closed) {\n            this._complete();\n            return;\n        }\n        const index = this.index++;\n        if (this.active < this.concurrent) {\n            destination.next(value);\n            try {\n                const { project } = this;\n                const result = project(value, index);\n                if (!this.scheduler) {\n                    this.subscribeToProjection(result, value, index);\n                }\n                else {\n                    const state = { subscriber: this, result, value, index };\n                    const destination = this.destination;\n                    destination.add(this.scheduler.schedule(ExpandSubscriber.dispatch, 0, state));\n                }\n            }\n            catch (e) {\n                destination.error(e);\n            }\n        }\n        else {\n            this.buffer.push(value);\n        }\n    }\n    subscribeToProjection(result, value, index) {\n        this.active++;\n        const destination = this.destination;\n        destination.add(innerSubscribe(result, new SimpleInnerSubscriber(this)));\n    }\n    _complete() {\n        this.hasCompleted = true;\n        if (this.hasCompleted && this.active === 0) {\n            this.destination.complete();\n        }\n        this.unsubscribe();\n    }\n    notifyNext(innerValue) {\n        this._next(innerValue);\n    }\n    notifyComplete() {\n        const buffer = this.buffer;\n        this.active--;\n        if (buffer && buffer.length > 0) {\n            this._next(buffer.shift());\n        }\n        if (this.hasCompleted && this.active === 0) {\n            this.destination.complete();\n        }\n    }\n}\n//# sourceMappingURL=expand.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\n/* tslint:disable:no-unused-variable */\n// Subject imported before Observable to bypass circular dependency issue since\n// Subject extends Observable and Observable references Subject in it's\n// definition\nvar rxjs_1 = require(\"rxjs\");\nexports.Observable = rxjs_1.Observable;\nexports.Subject = rxjs_1.Subject;\nvar internal_compatibility_1 = require(\"rxjs/internal-compatibility\");\nexports.AnonymousSubject = internal_compatibility_1.AnonymousSubject;\n/* tslint:enable:no-unused-variable */\nvar internal_compatibility_2 = require(\"rxjs/internal-compatibility\");\nexports.config = internal_compatibility_2.config;\n// statics\n/* tslint:disable:no-use-before-declare */\nrequire(\"./add/observable/bindCallback\");\nrequire(\"./add/observable/bindNodeCallback\");\nrequire(\"./add/observable/combineLatest\");\nrequire(\"./add/observable/concat\");\nrequire(\"./add/observable/defer\");\nrequire(\"./add/observable/empty\");\nrequire(\"./add/observable/forkJoin\");\nrequire(\"./add/observable/from\");\nrequire(\"./add/observable/fromEvent\");\nrequire(\"./add/observable/fromEventPattern\");\nrequire(\"./add/observable/fromPromise\");\nrequire(\"./add/observable/generate\");\nrequire(\"./add/observable/if\");\nrequire(\"./add/observable/interval\");\nrequire(\"./add/observable/merge\");\nrequire(\"./add/observable/race\");\nrequire(\"./add/observable/never\");\nrequire(\"./add/observable/of\");\nrequire(\"./add/observable/onErrorResumeNext\");\nrequire(\"./add/observable/pairs\");\nrequire(\"./add/observable/range\");\nrequire(\"./add/observable/using\");\nrequire(\"./add/observable/throw\");\nrequire(\"./add/observable/timer\");\nrequire(\"./add/observable/zip\");\n//dom\nrequire(\"./add/observable/dom/ajax\");\nrequire(\"./add/observable/dom/webSocket\");\n//internal/operators\nrequire(\"./add/operator/buffer\");\nrequire(\"./add/operator/bufferCount\");\nrequire(\"./add/operator/bufferTime\");\nrequire(\"./add/operator/bufferToggle\");\nrequire(\"./add/operator/bufferWhen\");\nrequire(\"./add/operator/catch\");\nrequire(\"./add/operator/combineAll\");\nrequire(\"./add/operator/combineLatest\");\nrequire(\"./add/operator/concat\");\nrequire(\"./add/operator/concatAll\");\nrequire(\"./add/operator/concatMap\");\nrequire(\"./add/operator/concatMapTo\");\nrequire(\"./add/operator/count\");\nrequire(\"./add/operator/dematerialize\");\nrequire(\"./add/operator/debounce\");\nrequire(\"./add/operator/debounceTime\");\nrequire(\"./add/operator/defaultIfEmpty\");\nrequire(\"./add/operator/delay\");\nrequire(\"./add/operator/delayWhen\");\nrequire(\"./add/operator/distinct\");\nrequire(\"./add/operator/distinctUntilChanged\");\nrequire(\"./add/operator/distinctUntilKeyChanged\");\nrequire(\"./add/operator/do\");\nrequire(\"./add/operator/exhaust\");\nrequire(\"./add/operator/exhaustMap\");\nrequire(\"./add/operator/expand\");\nrequire(\"./add/operator/elementAt\");\nrequire(\"./add/operator/filter\");\nrequire(\"./add/operator/finally\");\nrequire(\"./add/operator/find\");\nrequire(\"./add/operator/findIndex\");\nrequire(\"./add/operator/first\");\nrequire(\"./add/operator/groupBy\");\nrequire(\"./add/operator/ignoreElements\");\nrequire(\"./add/operator/isEmpty\");\nrequire(\"./add/operator/audit\");\nrequire(\"./add/operator/auditTime\");\nrequire(\"./add/operator/last\");\nrequire(\"./add/operator/let\");\nrequire(\"./add/operator/every\");\nrequire(\"./add/operator/map\");\nrequire(\"./add/operator/mapTo\");\nrequire(\"./add/operator/materialize\");\nrequire(\"./add/operator/max\");\nrequire(\"./add/operator/merge\");\nrequire(\"./add/operator/mergeAll\");\nrequire(\"./add/operator/mergeMap\");\nrequire(\"./add/operator/mergeMapTo\");\nrequire(\"./add/operator/mergeScan\");\nrequire(\"./add/operator/min\");\nrequire(\"./add/operator/multicast\");\nrequire(\"./add/operator/observeOn\");\nrequire(\"./add/operator/onErrorResumeNext\");\nrequire(\"./add/operator/pairwise\");\nrequire(\"./add/operator/partition\");\nrequire(\"./add/operator/pluck\");\nrequire(\"./add/operator/publish\");\nrequire(\"./add/operator/publishBehavior\");\nrequire(\"./add/operator/publishReplay\");\nrequire(\"./add/operator/publishLast\");\nrequire(\"./add/operator/race\");\nrequire(\"./add/operator/reduce\");\nrequire(\"./add/operator/repeat\");\nrequire(\"./add/operator/repeatWhen\");\nrequire(\"./add/operator/retry\");\nrequire(\"./add/operator/retryWhen\");\nrequire(\"./add/operator/sample\");\nrequire(\"./add/operator/sampleTime\");\nrequire(\"./add/operator/scan\");\nrequire(\"./add/operator/sequenceEqual\");\nrequire(\"./add/operator/share\");\nrequire(\"./add/operator/shareReplay\");\nrequire(\"./add/operator/single\");\nrequire(\"./add/operator/skip\");\nrequire(\"./add/operator/skipLast\");\nrequire(\"./add/operator/skipUntil\");\nrequire(\"./add/operator/skipWhile\");\nrequire(\"./add/operator/startWith\");\nrequire(\"./add/operator/subscribeOn\");\nrequire(\"./add/operator/switch\");\nrequire(\"./add/operator/switchMap\");\nrequire(\"./add/operator/switchMapTo\");\nrequire(\"./add/operator/take\");\nrequire(\"./add/operator/takeLast\");\nrequire(\"./add/operator/takeUntil\");\nrequire(\"./add/operator/takeWhile\");\nrequire(\"./add/operator/throttle\");\nrequire(\"./add/operator/throttleTime\");\nrequire(\"./add/operator/timeInterval\");\nrequire(\"./add/operator/timeout\");\nrequire(\"./add/operator/timeoutWith\");\nrequire(\"./add/operator/timestamp\");\nrequire(\"./add/operator/toArray\");\nrequire(\"./add/operator/toPromise\");\nrequire(\"./add/operator/window\");\nrequire(\"./add/operator/windowCount\");\nrequire(\"./add/operator/windowTime\");\nrequire(\"./add/operator/windowToggle\");\nrequire(\"./add/operator/windowWhen\");\nrequire(\"./add/operator/withLatestFrom\");\nrequire(\"./add/operator/zip\");\nrequire(\"./add/operator/zipAll\");\n/* tslint:disable:no-unused-variable */\nvar rxjs_2 = require(\"rxjs\");\nexports.Subscription = rxjs_2.Subscription;\nexports.ReplaySubject = rxjs_2.ReplaySubject;\nexports.BehaviorSubject = rxjs_2.BehaviorSubject;\nexports.Notification = rxjs_2.Notification;\nexports.EmptyError = rxjs_2.EmptyError;\nexports.ArgumentOutOfRangeError = rxjs_2.ArgumentOutOfRangeError;\nexports.ObjectUnsubscribedError = rxjs_2.ObjectUnsubscribedError;\nexports.UnsubscriptionError = rxjs_2.UnsubscriptionError;\nexports.pipe = rxjs_2.pipe;\nvar testing_1 = require(\"rxjs/testing\");\nexports.TestScheduler = testing_1.TestScheduler;\nvar rxjs_3 = require(\"rxjs\");\nexports.Subscriber = rxjs_3.Subscriber;\nexports.AsyncSubject = rxjs_3.AsyncSubject;\nexports.ConnectableObservable = rxjs_3.ConnectableObservable;\nexports.TimeoutError = rxjs_3.TimeoutError;\nexports.VirtualTimeScheduler = rxjs_3.VirtualTimeScheduler;\nvar ajax_1 = require(\"rxjs/ajax\");\nexports.AjaxResponse = ajax_1.AjaxResponse;\nexports.AjaxError = ajax_1.AjaxError;\nexports.AjaxTimeoutError = ajax_1.AjaxTimeoutError;\nvar rxjs_4 = require(\"rxjs\");\nvar internal_compatibility_3 = require(\"rxjs/internal-compatibility\");\nvar internal_compatibility_4 = require(\"rxjs/internal-compatibility\");\nexports.TimeInterval = internal_compatibility_4.TimeInterval;\nexports.Timestamp = internal_compatibility_4.Timestamp;\nvar _operators = require(\"rxjs/operators\");\nexports.operators = _operators;\n/* tslint:enable:no-unused-variable */\n/**\n * @typedef {Object} Rx.Scheduler\n * @property {Scheduler} queue Schedules on a queue in the current event frame\n * (trampoline scheduler). Use this for iteration operations.\n * @property {Scheduler} asap Schedules on the micro task queue, which is the same\n * queue used for promises. Basically after the current job, but before the next\n * job. Use this for asynchronous conversions.\n * @property {Scheduler} async Schedules work with `setInterval`. Use this for\n * time-based operations.\n * @property {Scheduler} animationFrame Schedules work with `requestAnimationFrame`.\n * Use this for synchronizing with the platform's painting\n */\nvar Scheduler = {\n    asap: rxjs_4.asapScheduler,\n    queue: rxjs_4.queueScheduler,\n    animationFrame: rxjs_4.animationFrameScheduler,\n    async: rxjs_4.asyncScheduler\n};\nexports.Scheduler = Scheduler;\n/**\n * @typedef {Object} Rx.Symbol\n * @property {Symbol|string} rxSubscriber A symbol to use as a property name to\n * retrieve an \"Rx safe\" Observer from an object. \"Rx safety\" can be defined as\n * an object that has all of the traits of an Rx Subscriber, including the\n * ability to add and remove subscriptions to the subscription chain and\n * guarantees involving event triggering (can't \"next\" after unsubscription,\n * etc).\n * @property {Symbol|string} observable A symbol to use as a property name to\n * retrieve an Observable as defined by the [ECMAScript \"Observable\" spec](https://github.com/zenparsing/es-observable).\n * @property {Symbol|string} iterator The ES6 symbol to use as a property name\n * to retrieve an iterator from an object.\n */\nvar Symbol = {\n    rxSubscriber: internal_compatibility_3.rxSubscriber,\n    observable: internal_compatibility_3.observable,\n    iterator: internal_compatibility_3.iterator\n};\nexports.Symbol = Symbol;\n//# sourceMappingURL=Rx.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar distinct_1 = require(\"../../operator/distinct\");\nrxjs_1.Observable.prototype.distinct = distinct_1.distinct;\n//# sourceMappingURL=distinct.js.map","import { reduce } from './reduce';\nexport function min(comparer) {\n    const min = (typeof comparer === 'function')\n        ? (x, y) => comparer(x, y) < 0 ? x : y\n        : (x, y) => x < y ? x : y;\n    return reduce(min);\n}\n//# sourceMappingURL=min.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport const MAC_ENTER = 3;\nexport const BACKSPACE = 8;\nexport const TAB = 9;\nexport const NUM_CENTER = 12;\nexport const ENTER = 13;\nexport const SHIFT = 16;\nexport const CONTROL = 17;\nexport const ALT = 18;\nexport const PAUSE = 19;\nexport const CAPS_LOCK = 20;\nexport const ESCAPE = 27;\nexport const SPACE = 32;\nexport const PAGE_UP = 33;\nexport const PAGE_DOWN = 34;\nexport const END = 35;\nexport const HOME = 36;\nexport const LEFT_ARROW = 37;\nexport const UP_ARROW = 38;\nexport const RIGHT_ARROW = 39;\nexport const DOWN_ARROW = 40;\nexport const PLUS_SIGN = 43;\nexport const PRINT_SCREEN = 44;\nexport const INSERT = 45;\nexport const DELETE = 46;\nexport const ZERO = 48;\nexport const ONE = 49;\nexport const TWO = 50;\nexport const THREE = 51;\nexport const FOUR = 52;\nexport const FIVE = 53;\nexport const SIX = 54;\nexport const SEVEN = 55;\nexport const EIGHT = 56;\nexport const NINE = 57;\nexport const FF_SEMICOLON = 59;     // Firefox (Gecko) fires this for semicolon instead of 186\nexport const FF_EQUALS = 61;        // Firefox (Gecko) fires this for equals instead of 187\nexport const QUESTION_MARK = 63;\nexport const AT_SIGN = 64;\nexport const A = 65;\nexport const B = 66;\nexport const C = 67;\nexport const D = 68;\nexport const E = 69;\nexport const F = 70;\nexport const G = 71;\nexport const H = 72;\nexport const I = 73;\nexport const J = 74;\nexport const K = 75;\nexport const L = 76;\nexport const M = 77;\nexport const N = 78;\nexport const O = 79;\nexport const P = 80;\nexport const Q = 81;\nexport const R = 82;\nexport const S = 83;\nexport const T = 84;\nexport const U = 85;\nexport const V = 86;\nexport const W = 87;\nexport const X = 88;\nexport const Y = 89;\nexport const Z = 90;\nexport const META = 91;             // WIN_KEY_LEFT\nexport const MAC_WK_CMD_LEFT = 91;\nexport const MAC_WK_CMD_RIGHT = 93;\nexport const CONTEXT_MENU = 93;\nexport const NUMPAD_ZERO = 96;\nexport const NUMPAD_ONE = 97;\nexport const NUMPAD_TWO = 98;\nexport const NUMPAD_THREE = 99;\nexport const NUMPAD_FOUR = 100;\nexport const NUMPAD_FIVE = 101;\nexport const NUMPAD_SIX = 102;\nexport const NUMPAD_SEVEN = 103;\nexport const NUMPAD_EIGHT = 104;\nexport const NUMPAD_NINE = 105;\nexport const NUMPAD_MULTIPLY = 106;\nexport const NUMPAD_PLUS = 107;\nexport const NUMPAD_MINUS = 109;\nexport const NUMPAD_PERIOD = 110;\nexport const NUMPAD_DIVIDE = 111;\nexport const F1 = 112;\nexport const F2 = 113;\nexport const F3 = 114;\nexport const F4 = 115;\nexport const F5 = 116;\nexport const F6 = 117;\nexport const F7 = 118;\nexport const F8 = 119;\nexport const F9 = 120;\nexport const F10 = 121;\nexport const F11 = 122;\nexport const F12 = 123;\nexport const NUM_LOCK = 144;\nexport const SCROLL_LOCK = 145;\nexport const FIRST_MEDIA = 166;\nexport const FF_MINUS = 173;\nexport const MUTE = 173;            // Firefox (Gecko) fires 181 for MUTE\nexport const VOLUME_DOWN = 174;     // Firefox (Gecko) fires 182 for VOLUME_DOWN\nexport const VOLUME_UP = 175;       // Firefox (Gecko) fires 183 for VOLUME_UP\nexport const FF_MUTE = 181;\nexport const FF_VOLUME_DOWN = 182;\nexport const LAST_MEDIA = 183;\nexport const FF_VOLUME_UP = 183;\nexport const SEMICOLON = 186;       // Firefox (Gecko) fires 59 for SEMICOLON\nexport const EQUALS = 187;          // Firefox (Gecko) fires 61 for EQUALS\nexport const COMMA = 188;\nexport const DASH = 189;            // Firefox (Gecko) fires 173 for DASH/MINUS\nexport const SLASH = 191;\nexport const APOSTROPHE = 192;\nexport const TILDE = 192;\nexport const OPEN_SQUARE_BRACKET = 219;\nexport const BACKSLASH = 220;\nexport const CLOSE_SQUARE_BRACKET = 221;\nexport const SINGLE_QUOTE = 222;\nexport const MAC_META = 224;\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\ntype ModifierKey = 'altKey' | 'shiftKey' | 'ctrlKey' | 'metaKey';\n\n/**\n * Checks whether a modifier key is pressed.\n * @param event Event to be checked.\n */\nexport function hasModifierKey(event: KeyboardEvent, ...modifiers: ModifierKey[]): boolean {\n  if (modifiers.length) {\n    return modifiers.some(modifier => event[modifier]);\n  }\n\n  return event.altKey || event.shiftKey || event.ctrlKey || event.metaKey;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './keycodes';\nexport * from './modifiers';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar sampleTime_1 = require(\"../../operator/sampleTime\");\nrxjs_1.Observable.prototype.sampleTime = sampleTime_1.sampleTime;\n//# sourceMappingURL=sampleTime.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar sequenceEqual_1 = require(\"../../operator/sequenceEqual\");\nrxjs_1.Observable.prototype.sequenceEqual = sequenceEqual_1.sequenceEqual;\n//# sourceMappingURL=sequenceEqual.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.generate = rxjs_1.generate;\n//# sourceMappingURL=generate.js.map","import { Subscriber } from '../Subscriber';\nexport function takeWhile(predicate, inclusive = false) {\n    return (source) => source.lift(new TakeWhileOperator(predicate, inclusive));\n}\nclass TakeWhileOperator {\n    constructor(predicate, inclusive) {\n        this.predicate = predicate;\n        this.inclusive = inclusive;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new TakeWhileSubscriber(subscriber, this.predicate, this.inclusive));\n    }\n}\nclass TakeWhileSubscriber extends Subscriber {\n    constructor(destination, predicate, inclusive) {\n        super(destination);\n        this.predicate = predicate;\n        this.inclusive = inclusive;\n        this.index = 0;\n    }\n    _next(value) {\n        const destination = this.destination;\n        let result;\n        try {\n            result = this.predicate(value, this.index++);\n        }\n        catch (err) {\n            destination.error(err);\n            return;\n        }\n        this.nextOrComplete(value, result);\n    }\n    nextOrComplete(value, predicateResult) {\n        const destination = this.destination;\n        if (Boolean(predicateResult)) {\n            destination.next(value);\n        }\n        else {\n            if (this.inclusive) {\n                destination.next(value);\n            }\n            destination.complete();\n        }\n    }\n}\n//# sourceMappingURL=takeWhile.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  coerceBooleanProperty,\n  coerceNumberProperty,\n  coerceElement,\n  BooleanInput\n} from '@angular/cdk/coercion';\nimport {\n  AfterContentInit,\n  Directive,\n  ElementRef,\n  EventEmitter,\n  Injectable,\n  Input,\n  NgModule,\n  NgZone,\n  OnDestroy,\n  Output,\n} from '@angular/core';\nimport {Observable, Subject, Subscription, Observer} from 'rxjs';\nimport {debounceTime} from 'rxjs/operators';\n\n/**\n * Factory that creates a new MutationObserver and allows us to stub it out in unit tests.\n * @docs-private\n */\n@Injectable({providedIn: 'root'})\nexport class MutationObserverFactory {\n  create(callback: MutationCallback): MutationObserver | null {\n    return typeof MutationObserver === 'undefined' ? null : new MutationObserver(callback);\n  }\n}\n\n\n/** An injectable service that allows watching elements for changes to their content. */\n@Injectable({providedIn: 'root'})\nexport class ContentObserver implements OnDestroy {\n  /** Keeps track of the existing MutationObservers so they can be reused. */\n  private _observedElements = new Map<Element, {\n    observer: MutationObserver | null,\n    stream: Subject<MutationRecord[]>,\n    count: number\n  }>();\n\n  constructor(private _mutationObserverFactory: MutationObserverFactory) {}\n\n  ngOnDestroy() {\n    this._observedElements.forEach((_, element) => this._cleanupObserver(element));\n  }\n\n  /**\n   * Observe content changes on an element.\n   * @param element The element to observe for content changes.\n   */\n  observe(element: Element): Observable<MutationRecord[]>;\n\n  /**\n   * Observe content changes on an element.\n   * @param element The element to observe for content changes.\n   */\n  observe(element: ElementRef<Element>): Observable<MutationRecord[]>;\n\n  observe(elementOrRef: Element | ElementRef<Element>): Observable<MutationRecord[]> {\n    const element = coerceElement(elementOrRef);\n\n    return new Observable((observer: Observer<MutationRecord[]>) => {\n      const stream = this._observeElement(element);\n      const subscription = stream.subscribe(observer);\n\n      return () => {\n        subscription.unsubscribe();\n        this._unobserveElement(element);\n      };\n    });\n  }\n\n  /**\n   * Observes the given element by using the existing MutationObserver if available, or creating a\n   * new one if not.\n   */\n  private _observeElement(element: Element): Subject<MutationRecord[]> {\n    if (!this._observedElements.has(element)) {\n      const stream = new Subject<MutationRecord[]>();\n      const observer = this._mutationObserverFactory.create(mutations => stream.next(mutations));\n      if (observer) {\n        observer.observe(element, {\n          characterData: true,\n          childList: true,\n          subtree: true\n        });\n      }\n      this._observedElements.set(element, {observer, stream, count: 1});\n    } else {\n      this._observedElements.get(element)!.count++;\n    }\n    return this._observedElements.get(element)!.stream;\n  }\n\n  /**\n   * Un-observes the given element and cleans up the underlying MutationObserver if nobody else is\n   * observing this element.\n   */\n  private _unobserveElement(element: Element) {\n    if (this._observedElements.has(element)) {\n      this._observedElements.get(element)!.count--;\n      if (!this._observedElements.get(element)!.count) {\n        this._cleanupObserver(element);\n      }\n    }\n  }\n\n  /** Clean up the underlying MutationObserver for the specified element. */\n  private _cleanupObserver(element: Element) {\n    if (this._observedElements.has(element)) {\n      const {observer, stream} = this._observedElements.get(element)!;\n      if (observer) {\n        observer.disconnect();\n      }\n      stream.complete();\n      this._observedElements.delete(element);\n    }\n  }\n}\n\n\n/**\n * Directive that triggers a callback whenever the content of\n * its associated element has changed.\n */\n@Directive({\n  selector: '[cdkObserveContent]',\n  exportAs: 'cdkObserveContent',\n})\nexport class CdkObserveContent implements AfterContentInit, OnDestroy {\n  /** Event emitted for each change in the element's content. */\n  @Output('cdkObserveContent') event = new EventEmitter<MutationRecord[]>();\n\n  /**\n   * Whether observing content is disabled. This option can be used\n   * to disconnect the underlying MutationObserver until it is needed.\n   */\n  @Input('cdkObserveContentDisabled')\n  get disabled() { return this._disabled; }\n  set disabled(value: any) {\n    this._disabled = coerceBooleanProperty(value);\n    this._disabled ? this._unsubscribe() : this._subscribe();\n  }\n  private _disabled = false;\n\n  /** Debounce interval for emitting the changes. */\n  @Input()\n  get debounce(): number { return this._debounce; }\n  set debounce(value: number) {\n    this._debounce = coerceNumberProperty(value);\n    this._subscribe();\n  }\n  private _debounce: number;\n\n  private _currentSubscription: Subscription | null = null;\n\n  constructor(private _contentObserver: ContentObserver,\n              private _elementRef: ElementRef<HTMLElement>,\n              private _ngZone: NgZone) {}\n\n  ngAfterContentInit() {\n    if (!this._currentSubscription && !this.disabled) {\n      this._subscribe();\n    }\n  }\n\n  ngOnDestroy() {\n    this._unsubscribe();\n  }\n\n  private _subscribe() {\n    this._unsubscribe();\n    const stream = this._contentObserver.observe(this._elementRef);\n\n    // TODO(mmalerba): We shouldn't be emitting on this @Output() outside the zone.\n    // Consider brining it back inside the zone next time we're making breaking changes.\n    // Bringing it back inside can cause things like infinite change detection loops and changed\n    // after checked errors if people's code isn't handling it properly.\n    this._ngZone.runOutsideAngular(() => {\n      this._currentSubscription =\n          (this.debounce ? stream.pipe(debounceTime(this.debounce)) : stream).subscribe(this.event);\n    });\n  }\n\n  private _unsubscribe() {\n    if (this._currentSubscription) {\n      this._currentSubscription.unsubscribe();\n    }\n  }\n\n  static ngAcceptInputType_disabled: BooleanInput;\n  static ngAcceptInputType_debounce: BooleanInput;\n}\n\n\n@NgModule({\n  exports: [CdkObserveContent],\n  declarations: [CdkObserveContent],\n  providers: [MutationObserverFactory]\n})\nexport class ObserversModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './observe-content';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","import { Subscriber } from '../Subscriber';\nexport function every(predicate, thisArg) {\n    return (source) => source.lift(new EveryOperator(predicate, thisArg, source));\n}\nclass EveryOperator {\n    constructor(predicate, thisArg, source) {\n        this.predicate = predicate;\n        this.thisArg = thisArg;\n        this.source = source;\n    }\n    call(observer, source) {\n        return source.subscribe(new EverySubscriber(observer, this.predicate, this.thisArg, this.source));\n    }\n}\nclass EverySubscriber extends Subscriber {\n    constructor(destination, predicate, thisArg, source) {\n        super(destination);\n        this.predicate = predicate;\n        this.thisArg = thisArg;\n        this.source = source;\n        this.index = 0;\n        this.thisArg = thisArg || this;\n    }\n    notifyComplete(everyValueMatch) {\n        this.destination.next(everyValueMatch);\n        this.destination.complete();\n    }\n    _next(value) {\n        let result = false;\n        try {\n            result = this.predicate.call(this.thisArg, value, this.index++, this.source);\n        }\n        catch (err) {\n            this.destination.error(err);\n            return;\n        }\n        if (!result) {\n            this.notifyComplete(false);\n        }\n    }\n    _complete() {\n        this.notifyComplete(true);\n    }\n}\n//# sourceMappingURL=every.js.map","import { zip as zipStatic } from '../observable/zip';\nexport function zip(...observables) {\n    return function zipOperatorFunction(source) {\n        return source.lift.call(zipStatic(source, ...observables));\n    };\n}\n//# sourceMappingURL=zip.js.map","import { Subject } from '../Subject';\nimport { SimpleOuterSubscriber, innerSubscribe, SimpleInnerSubscriber } from '../innerSubscribe';\nexport function repeatWhen(notifier) {\n    return (source) => source.lift(new RepeatWhenOperator(notifier));\n}\nclass RepeatWhenOperator {\n    constructor(notifier) {\n        this.notifier = notifier;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new RepeatWhenSubscriber(subscriber, this.notifier, source));\n    }\n}\nclass RepeatWhenSubscriber extends SimpleOuterSubscriber {\n    constructor(destination, notifier, source) {\n        super(destination);\n        this.notifier = notifier;\n        this.source = source;\n        this.sourceIsBeingSubscribedTo = true;\n    }\n    notifyNext() {\n        this.sourceIsBeingSubscribedTo = true;\n        this.source.subscribe(this);\n    }\n    notifyComplete() {\n        if (this.sourceIsBeingSubscribedTo === false) {\n            return super.complete();\n        }\n    }\n    complete() {\n        this.sourceIsBeingSubscribedTo = false;\n        if (!this.isStopped) {\n            if (!this.retries) {\n                this.subscribeToRetries();\n            }\n            if (!this.retriesSubscription || this.retriesSubscription.closed) {\n                return super.complete();\n            }\n            this._unsubscribeAndRecycle();\n            this.notifications.next(undefined);\n        }\n    }\n    _unsubscribe() {\n        const { notifications, retriesSubscription } = this;\n        if (notifications) {\n            notifications.unsubscribe();\n            this.notifications = undefined;\n        }\n        if (retriesSubscription) {\n            retriesSubscription.unsubscribe();\n            this.retriesSubscription = undefined;\n        }\n        this.retries = undefined;\n    }\n    _unsubscribeAndRecycle() {\n        const { _unsubscribe } = this;\n        this._unsubscribe = null;\n        super._unsubscribeAndRecycle();\n        this._unsubscribe = _unsubscribe;\n        return this;\n    }\n    subscribeToRetries() {\n        this.notifications = new Subject();\n        let retries;\n        try {\n            const { notifier } = this;\n            retries = notifier(this.notifications);\n        }\n        catch (e) {\n            return super.complete();\n        }\n        this.retries = retries;\n        this.retriesSubscription = innerSubscribe(retries, new SimpleInnerSubscriber(this));\n    }\n}\n//# sourceMappingURL=repeatWhen.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/* tslint:enable:max-line-length */\n/**\n * Returns an Observable that emits all items emitted by the source Observable that are distinct by comparison from the previous item.\n *\n * If a comparator function is provided, then it will be called for each item to test for whether or not that value should be emitted.\n *\n * If a comparator function is not provided, an equality check is used by default.\n *\n * @example <caption>A simple example with numbers</caption>\n * Observable.of(1, 1, 2, 2, 2, 1, 1, 2, 3, 3, 4)\n *   .distinctUntilChanged()\n *   .subscribe(x => console.log(x)); // 1, 2, 1, 2, 3, 4\n *\n * @example <caption>An example using a compare function</caption>\n * interface Person {\n *    age: number,\n *    name: string\n * }\n *\n * Observable.of<Person>(\n *     { age: 4, name: 'Foo'},\n *     { age: 7, name: 'Bar'},\n *     { age: 5, name: 'Foo'},\n *     { age: 6, name: 'Foo'})\n *     .distinctUntilChanged((p: Person, q: Person) => p.name === q.name)\n *     .subscribe(x => console.log(x));\n *\n * // displays:\n * // { age: 4, name: 'Foo' }\n * // { age: 7, name: 'Bar' }\n * // { age: 5, name: 'Foo' }\n *\n * @see {@link distinct}\n * @see {@link distinctUntilKeyChanged}\n *\n * @param {function} [compare] Optional comparison function called to test if an item is distinct from the previous item in the source.\n * @return {Observable} An Observable that emits items from the source Observable with distinct values.\n * @method distinctUntilChanged\n * @owner Observable\n */\nfunction distinctUntilChanged(compare, keySelector) {\n    return operators_1.distinctUntilChanged(compare, keySelector)(this);\n}\nexports.distinctUntilChanged = distinctUntilChanged;\n//# sourceMappingURL=distinctUntilChanged.js.map","import { of } from './of';\nimport { concatAll } from '../operators/concatAll';\nexport function concat(...observables) {\n    return concatAll()(of(...observables));\n}\n//# sourceMappingURL=concat.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n *\n * Re-emits all notifications from source Observable with specified scheduler.\n *\n * <span class=\"informal\">Ensure a specific scheduler is used, from outside of an Observable.</span>\n *\n * `observeOn` is an operator that accepts a scheduler as a first parameter, which will be used to reschedule\n * notifications emitted by the source Observable. It might be useful, if you do not have control over\n * internal scheduler of a given Observable, but want to control when its values are emitted nevertheless.\n *\n * Returned Observable emits the same notifications (nexted values, complete and error events) as the source Observable,\n * but rescheduled with provided scheduler. Note that this doesn't mean that source Observables internal\n * scheduler will be replaced in any way. Original scheduler still will be used, but when the source Observable emits\n * notification, it will be immediately scheduled again - this time with scheduler passed to `observeOn`.\n * An anti-pattern would be calling `observeOn` on Observable that emits lots of values synchronously, to split\n * that emissions into asynchronous chunks. For this to happen, scheduler would have to be passed into the source\n * Observable directly (usually into the operator that creates it). `observeOn` simply delays notifications a\n * little bit more, to ensure that they are emitted at expected moments.\n *\n * As a matter of fact, `observeOn` accepts second parameter, which specifies in milliseconds with what delay notifications\n * will be emitted. The main difference between {@link delay} operator and `observeOn` is that `observeOn`\n * will delay all notifications - including error notifications - while `delay` will pass through error\n * from source Observable immediately when it is emitted. In general it is highly recommended to use `delay` operator\n * for any kind of delaying of values in the stream, while using `observeOn` to specify which scheduler should be used\n * for notification emissions in general.\n *\n * @example <caption>Ensure values in subscribe are called just before browser repaint.</caption>\n * const intervals = Rx.Observable.interval(10); // Intervals are scheduled\n *                                               // with async scheduler by default...\n *\n * intervals\n * .observeOn(Rx.Scheduler.animationFrame)       // ...but we will observe on animationFrame\n * .subscribe(val => {                           // scheduler to ensure smooth animation.\n *   someDiv.style.height = val + 'px';\n * });\n *\n * @see {@link delay}\n *\n * @param {SchedulerLike} scheduler Scheduler that will be used to reschedule notifications from source Observable.\n * @param {number} [delay] Number of milliseconds that states with what delay every notification should be rescheduled.\n * @return {Observable<T>} Observable that emits the same notifications as the source Observable,\n * but with provided scheduler.\n *\n * @method observeOn\n * @owner Observable\n */\nfunction observeOn(scheduler, delay) {\n    if (delay === void 0) { delay = 0; }\n    return operators_1.observeOn(scheduler, delay)(this);\n}\nexports.observeOn = observeOn;\n//# sourceMappingURL=observeOn.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.pairs = rxjs_1.pairs;\n//# sourceMappingURL=pairs.js.map","import { canReportError } from './util/canReportError';\nimport { toSubscriber } from './util/toSubscriber';\nimport { observable as Symbol_observable } from './symbol/observable';\nimport { pipeFromArray } from './util/pipe';\nimport { config } from './config';\nexport class Observable {\n    constructor(subscribe) {\n        this._isScalar = false;\n        if (subscribe) {\n            this._subscribe = subscribe;\n        }\n    }\n    lift(operator) {\n        const observable = new Observable();\n        observable.source = this;\n        observable.operator = operator;\n        return observable;\n    }\n    subscribe(observerOrNext, error, complete) {\n        const { operator } = this;\n        const sink = toSubscriber(observerOrNext, error, complete);\n        if (operator) {\n            sink.add(operator.call(sink, this.source));\n        }\n        else {\n            sink.add(this.source || (config.useDeprecatedSynchronousErrorHandling && !sink.syncErrorThrowable) ?\n                this._subscribe(sink) :\n                this._trySubscribe(sink));\n        }\n        if (config.useDeprecatedSynchronousErrorHandling) {\n            if (sink.syncErrorThrowable) {\n                sink.syncErrorThrowable = false;\n                if (sink.syncErrorThrown) {\n                    throw sink.syncErrorValue;\n                }\n            }\n        }\n        return sink;\n    }\n    _trySubscribe(sink) {\n        try {\n            return this._subscribe(sink);\n        }\n        catch (err) {\n            if (config.useDeprecatedSynchronousErrorHandling) {\n                sink.syncErrorThrown = true;\n                sink.syncErrorValue = err;\n            }\n            if (canReportError(sink)) {\n                sink.error(err);\n            }\n            else {\n                console.warn(err);\n            }\n        }\n    }\n    forEach(next, promiseCtor) {\n        promiseCtor = getPromiseCtor(promiseCtor);\n        return new promiseCtor((resolve, reject) => {\n            let subscription;\n            subscription = this.subscribe((value) => {\n                try {\n                    next(value);\n                }\n                catch (err) {\n                    reject(err);\n                    if (subscription) {\n                        subscription.unsubscribe();\n                    }\n                }\n            }, reject, resolve);\n        });\n    }\n    _subscribe(subscriber) {\n        const { source } = this;\n        return source && source.subscribe(subscriber);\n    }\n    [Symbol_observable]() {\n        return this;\n    }\n    pipe(...operations) {\n        if (operations.length === 0) {\n            return this;\n        }\n        return pipeFromArray(operations)(this);\n    }\n    toPromise(promiseCtor) {\n        promiseCtor = getPromiseCtor(promiseCtor);\n        return new promiseCtor((resolve, reject) => {\n            let value;\n            this.subscribe((x) => value = x, (err) => reject(err), () => resolve(value));\n        });\n    }\n}\nObservable.create = (subscribe) => {\n    return new Observable(subscribe);\n};\nfunction getPromiseCtor(promiseCtor) {\n    if (!promiseCtor) {\n        promiseCtor = config.Promise || Promise;\n    }\n    if (!promiseCtor) {\n        throw new Error('no Promise impl found');\n    }\n    return promiseCtor;\n}\n//# sourceMappingURL=Observable.js.map","import { AsyncScheduler } from './AsyncScheduler';\nexport class QueueScheduler extends AsyncScheduler {\n}\n//# sourceMappingURL=QueueScheduler.js.map","import { Observable } from '../Observable';\nimport { from } from './from';\nimport { isArray } from '../util/isArray';\nimport { EMPTY } from './empty';\nexport function onErrorResumeNext(...sources) {\n    if (sources.length === 0) {\n        return EMPTY;\n    }\n    const [first, ...remainder] = sources;\n    if (sources.length === 1 && isArray(first)) {\n        return onErrorResumeNext(...first);\n    }\n    return new Observable(subscriber => {\n        const subNext = () => subscriber.add(onErrorResumeNext(...remainder).subscribe(subscriber));\n        return from(first).subscribe({\n            next(value) { subscriber.next(value); },\n            error: subNext,\n            complete: subNext,\n        });\n    });\n}\n//# sourceMappingURL=onErrorResumeNext.js.map","import { Subscriber } from '../Subscriber';\nexport function count(predicate) {\n    return (source) => source.lift(new CountOperator(predicate, source));\n}\nclass CountOperator {\n    constructor(predicate, source) {\n        this.predicate = predicate;\n        this.source = source;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new CountSubscriber(subscriber, this.predicate, this.source));\n    }\n}\nclass CountSubscriber extends Subscriber {\n    constructor(destination, predicate, source) {\n        super(destination);\n        this.predicate = predicate;\n        this.source = source;\n        this.count = 0;\n        this.index = 0;\n    }\n    _next(value) {\n        if (this.predicate) {\n            this._tryPredicate(value);\n        }\n        else {\n            this.count++;\n        }\n    }\n    _tryPredicate(value) {\n        let result;\n        try {\n            result = this.predicate(value, this.index++, this.source);\n        }\n        catch (err) {\n            this.destination.error(err);\n            return;\n        }\n        if (result) {\n            this.count++;\n        }\n    }\n    _complete() {\n        this.destination.next(this.count);\n        this.destination.complete();\n    }\n}\n//# sourceMappingURL=count.js.map","export const isArrayLike = ((x) => x && typeof x.length === 'number' && typeof x !== 'function');\n//# sourceMappingURL=isArrayLike.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar takeWhile_1 = require(\"../../operator/takeWhile\");\nrxjs_1.Observable.prototype.takeWhile = takeWhile_1.takeWhile;\n//# sourceMappingURL=takeWhile.js.map","import { reduce } from './reduce';\nfunction toArrayReducer(arr, item, index) {\n    if (index === 0) {\n        return [item];\n    }\n    arr.push(item);\n    return arr;\n}\nexport function toArray() {\n    return reduce(toArrayReducer, []);\n}\n//# sourceMappingURL=toArray.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * @param value\n * @return {ConnectableObservable<T>}\n * @method publishBehavior\n * @owner Observable\n */\nfunction publishBehavior(value) {\n    return operators_1.publishBehavior(value)(this);\n}\nexports.publishBehavior = publishBehavior;\n//# sourceMappingURL=publishBehavior.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Converts a higher-order Observable into a first-order Observable by waiting\n * for the outer Observable to complete, then applying {@link combineLatest}.\n *\n * <span class=\"informal\">Flattens an Observable-of-Observables by applying\n * {@link combineLatest} when the Observable-of-Observables completes.</span>\n *\n * <img src=\"./img/combineAll.png\" width=\"100%\">\n *\n * Takes an Observable of Observables, and collects all Observables from it.\n * Once the outer Observable completes, it subscribes to all collected\n * Observables and combines their values using the {@link combineLatest}\n * strategy, such that:\n * - Every time an inner Observable emits, the output Observable emits.\n * - When the returned observable emits, it emits all of the latest values by:\n *   - If a `project` function is provided, it is called with each recent value\n *     from each inner Observable in whatever order they arrived, and the result\n *     of the `project` function is what is emitted by the output Observable.\n *   - If there is no `project` function, an array of all of the most recent\n *     values is emitted by the output Observable.\n *\n * @example <caption>Map two click events to a finite interval Observable, then apply combineAll</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var higherOrder = clicks.map(ev =>\n *   Rx.Observable.interval(Math.random()*2000).take(3)\n * ).take(2);\n * var result = higherOrder.combineAll();\n * result.subscribe(x => console.log(x));\n *\n * @see {@link combineLatest}\n * @see {@link mergeAll}\n *\n * @param {function} [project] An optional function to map the most recent\n * values from each inner Observable into a new result. Takes each of the most\n * recent values from each collected inner Observable as arguments, in order.\n * @return {Observable} An Observable of projected results or arrays of recent\n * values.\n * @method combineAll\n * @owner Observable\n */\nfunction combineAll(project) {\n    return operators_1.combineAll(project)(this);\n}\nexports.combineAll = combineAll;\n//# sourceMappingURL=combineAll.js.map","/*\n* FileSaver.js\n* A saveAs() FileSaver implementation.\n*\n* By Eli Grey, http://eligrey.com\n*\n* License : https://github.com/eligrey/FileSaver.js/blob/master/LICENSE.md (MIT)\n* source  : http://purl.eligrey.com/github/FileSaver.js\n*/\n\n// The one and only way of getting global scope in all environments\n// https://stackoverflow.com/q/3277182/1008999\nvar _global = typeof window === 'object' && window.window === window\n  ? window : typeof self === 'object' && self.self === self\n  ? self : typeof global === 'object' && global.global === global\n  ? global\n  : this\n\nfunction bom (blob, opts) {\n  if (typeof opts === 'undefined') opts = { autoBom: false }\n  else if (typeof opts !== 'object') {\n    console.warn('Deprecated: Expected third argument to be a object')\n    opts = { autoBom: !opts }\n  }\n\n  // prepend BOM for UTF-8 XML and text/* types (including HTML)\n  // note: your browser will automatically convert UTF-16 U+FEFF to EF BB BF\n  if (opts.autoBom && /^\\s*(?:text\\/\\S*|application\\/xml|\\S*\\/\\S*\\+xml)\\s*;.*charset\\s*=\\s*utf-8/i.test(blob.type)) {\n    return new Blob([String.fromCharCode(0xFEFF), blob], { type: blob.type })\n  }\n  return blob\n}\n\nfunction download (url, name, opts) {\n  var xhr = new XMLHttpRequest()\n  xhr.open('GET', url)\n  xhr.responseType = 'blob'\n  xhr.onload = function () {\n    saveAs(xhr.response, name, opts)\n  }\n  xhr.onerror = function () {\n    console.error('could not download file')\n  }\n  xhr.send()\n}\n\nfunction corsEnabled (url) {\n  var xhr = new XMLHttpRequest()\n  // use sync to avoid popup blocker\n  xhr.open('HEAD', url, false)\n  try {\n    xhr.send()\n  } catch (e) {}\n  return xhr.status >= 200 && xhr.status <= 299\n}\n\n// `a.click()` doesn't work for all browsers (#465)\nfunction click (node) {\n  try {\n    node.dispatchEvent(new MouseEvent('click'))\n  } catch (e) {\n    var evt = document.createEvent('MouseEvents')\n    evt.initMouseEvent('click', true, true, window, 0, 0, 0, 80,\n                          20, false, false, false, false, 0, null)\n    node.dispatchEvent(evt)\n  }\n}\n\nvar saveAs = _global.saveAs || (\n  // probably in some web worker\n  (typeof window !== 'object' || window !== _global)\n    ? function saveAs () { /* noop */ }\n\n  // Use download attribute first if possible (#193 Lumia mobile)\n  : 'download' in HTMLAnchorElement.prototype\n  ? function saveAs (blob, name, opts) {\n    var URL = _global.URL || _global.webkitURL\n    var a = document.createElement('a')\n    name = name || blob.name || 'download'\n\n    a.download = name\n    a.rel = 'noopener' // tabnabbing\n\n    // TODO: detect chrome extensions & packaged apps\n    // a.target = '_blank'\n\n    if (typeof blob === 'string') {\n      // Support regular links\n      a.href = blob\n      if (a.origin !== location.origin) {\n        corsEnabled(a.href)\n          ? download(blob, name, opts)\n          : click(a, a.target = '_blank')\n      } else {\n        click(a)\n      }\n    } else {\n      // Support blobs\n      a.href = URL.createObjectURL(blob)\n      setTimeout(function () { URL.revokeObjectURL(a.href) }, 4E4) // 40s\n      setTimeout(function () { click(a) }, 0)\n    }\n  }\n\n  // Use msSaveOrOpenBlob as a second approach\n  : 'msSaveOrOpenBlob' in navigator\n  ? function saveAs (blob, name, opts) {\n    name = name || blob.name || 'download'\n\n    if (typeof blob === 'string') {\n      if (corsEnabled(blob)) {\n        download(blob, name, opts)\n      } else {\n        var a = document.createElement('a')\n        a.href = blob\n        a.target = '_blank'\n        setTimeout(function () { click(a) })\n      }\n    } else {\n      navigator.msSaveOrOpenBlob(bom(blob, opts), name)\n    }\n  }\n\n  // Fallback to using FileReader and a popup\n  : function saveAs (blob, name, opts, popup) {\n    // Open a popup immediately do go around popup blocker\n    // Mostly only available on user interaction and the fileReader is async so...\n    popup = popup || open('', '_blank')\n    if (popup) {\n      popup.document.title =\n      popup.document.body.innerText = 'downloading...'\n    }\n\n    if (typeof blob === 'string') return download(blob, name, opts)\n\n    var force = blob.type === 'application/octet-stream'\n    var isSafari = /constructor/i.test(_global.HTMLElement) || _global.safari\n    var isChromeIOS = /CriOS\\/[\\d]+/.test(navigator.userAgent)\n\n    if ((isChromeIOS || (force && isSafari)) && typeof FileReader === 'object') {\n      // Safari doesn't allow downloading of blob URLs\n      var reader = new FileReader()\n      reader.onloadend = function () {\n        var url = reader.result\n        url = isChromeIOS ? url : url.replace(/^data:[^;]*;/, 'data:attachment/file;')\n        if (popup) popup.location.href = url\n        else location = url\n        popup = null // reverse-tabnabbing #460\n      }\n      reader.readAsDataURL(blob)\n    } else {\n      var URL = _global.URL || _global.webkitURL\n      var url = URL.createObjectURL(blob)\n      if (popup) popup.location = url\n      else location.href = url\n      popup = null // reverse-tabnabbing #460\n      setTimeout(function () { URL.revokeObjectURL(url) }, 4E4) // 40s\n    }\n  }\n)\n\n_global.saveAs = saveAs.saveAs = saveAs\n\nif (typeof module !== 'undefined') {\n  module.exports = saveAs;\n}\n","var arrayLikeToArray = require(\"./arrayLikeToArray\");\n\nfunction _arrayWithoutHoles(arr) {\n  if (Array.isArray(arr)) return arrayLikeToArray(arr);\n}\n\nmodule.exports = _arrayWithoutHoles;","import { Scheduler } from '../Scheduler';\nexport class AsyncScheduler extends Scheduler {\n    constructor(SchedulerAction, now = Scheduler.now) {\n        super(SchedulerAction, () => {\n            if (AsyncScheduler.delegate && AsyncScheduler.delegate !== this) {\n                return AsyncScheduler.delegate.now();\n            }\n            else {\n                return now();\n            }\n        });\n        this.actions = [];\n        this.active = false;\n        this.scheduled = undefined;\n    }\n    schedule(work, delay = 0, state) {\n        if (AsyncScheduler.delegate && AsyncScheduler.delegate !== this) {\n            return AsyncScheduler.delegate.schedule(work, delay, state);\n        }\n        else {\n            return super.schedule(work, delay, state);\n        }\n    }\n    flush(action) {\n        const { actions } = this;\n        if (this.active) {\n            actions.push(action);\n            return;\n        }\n        let error;\n        this.active = true;\n        do {\n            if (error = action.execute(action.state, action.delay)) {\n                break;\n            }\n        } while (action = actions.shift());\n        this.active = false;\n        if (error) {\n            while (action = actions.shift()) {\n                action.unsubscribe();\n            }\n            throw error;\n        }\n    }\n}\n//# sourceMappingURL=AsyncScheduler.js.map","export function _createEventBus(pdfJsViewer: any): any {\n  const globalEventBus = new pdfJsViewer.EventBus(true);\n  attachDOMEventsToEventBus(globalEventBus);\n\n  return globalEventBus;\n}\n\nfunction attachDOMEventsToEventBus(eventBus: any) {\n  eventBus.on('documentload', function() {\n    const event = document.createEvent('CustomEvent');\n    event.initCustomEvent('documentload', true, true, {});\n    window.dispatchEvent(event);\n  });\n  eventBus.on('pagerendered', function(evt) {\n    const event = document.createEvent('CustomEvent');\n    event.initCustomEvent('pagerendered', true, true, {\n      pageNumber: evt.pageNumber,\n      cssTransform: evt.cssTransform\n    });\n    evt.source.div.dispatchEvent(event);\n  });\n  eventBus.on('textlayerrendered', function(evt) {\n    const event = document.createEvent('CustomEvent');\n    event.initCustomEvent('textlayerrendered', true, true, {\n      pageNumber: evt.pageNumber\n    });\n    evt.source.textLayerDiv.dispatchEvent(event);\n  });\n  eventBus.on('pagechanging', function(evt) {\n    const event = document.createEvent('UIEvents');\n    event.initEvent('pagechanging', true, true);\n    event['pageNumber'] = evt.pageNumber;\n    evt.source.container.dispatchEvent(event);\n  });\n  eventBus.on('pagesinit', function(evt) {\n    const event = document.createEvent('CustomEvent');\n    event.initCustomEvent('pagesinit', true, true, null);\n    evt.source.container.dispatchEvent(event);\n  });\n  eventBus.on('pagesloaded', function(evt) {\n    const event = document.createEvent('CustomEvent');\n    event.initCustomEvent('pagesloaded', true, true, {\n      pagesCount: evt.pagesCount\n    });\n    evt.source.container.dispatchEvent(event);\n  });\n  eventBus.on('scalechange', function(evt) {\n    const event = document.createEvent('UIEvents');\n    event.initEvent('scalechange', true, true);\n    event['scale'] = evt.scale;\n    event['presetValue'] = evt.presetValue;\n    evt.source.container.dispatchEvent(event);\n  });\n  eventBus.on('updateviewarea', function(evt) {\n    const event = document.createEvent('UIEvents');\n    event.initEvent('updateviewarea', true, true);\n    event['location'] = evt.location;\n    evt.source.container.dispatchEvent(event);\n  });\n  eventBus.on('find', function(evt) {\n    if (evt.source === window) {\n      return; // event comes from FirefoxCom, no need to replicate\n    }\n    const event = document.createEvent('CustomEvent');\n    event.initCustomEvent('find' + evt.type, true, true, {\n      query: evt.query,\n      phraseSearch: evt.phraseSearch,\n      caseSensitive: evt.caseSensitive,\n      highlightAll: evt.highlightAll,\n      findPrevious: evt.findPrevious\n    });\n    window.dispatchEvent(event);\n  });\n  eventBus.on('attachmentsloaded', function(evt) {\n    const event = document.createEvent('CustomEvent');\n    event.initCustomEvent('attachmentsloaded', true, true, {\n      attachmentsCount: evt.attachmentsCount\n    });\n    evt.source.container.dispatchEvent(event);\n  });\n  eventBus.on('sidebarviewchanged', function(evt) {\n    const event = document.createEvent('CustomEvent');\n    event.initCustomEvent('sidebarviewchanged', true, true, {\n      view: evt.view\n    });\n    evt.source.outerContainer.dispatchEvent(event);\n  });\n  eventBus.on('pagemode', function(evt) {\n    const event = document.createEvent('CustomEvent');\n    event.initCustomEvent('pagemode', true, true, {\n      mode: evt.mode\n    });\n    evt.source.pdfViewer.container.dispatchEvent(event);\n  });\n  eventBus.on('namedaction', function(evt) {\n    const event = document.createEvent('CustomEvent');\n    event.initCustomEvent('namedaction', true, true, {\n      action: evt.action\n    });\n    evt.source.pdfViewer.container.dispatchEvent(event);\n  });\n  eventBus.on('presentationmodechanged', function(evt) {\n    const event = document.createEvent('CustomEvent');\n    event.initCustomEvent('presentationmodechanged', true, true, {\n      active: evt.active,\n      switchInProgress: evt.switchInProgress\n    });\n    window.dispatchEvent(event);\n  });\n  eventBus.on('outlineloaded', function(evt) {\n    const event = document.createEvent('CustomEvent');\n    event.initCustomEvent('outlineloaded', true, true, {\n      outlineCount: evt.outlineCount\n    });\n    evt.source.container.dispatchEvent(event);\n  });\n}\n\nexport const createEventBus = _createEventBus;\n","/**\n * Created by vadimdez on 21/06/16.\n */\nimport {\n  Component,\n  Input,\n  Output,\n  ElementRef,\n  EventEmitter,\n  OnChanges,\n  SimpleChanges,\n  OnInit,\n  HostListener,\n  OnDestroy,\n  ViewChild,\n  AfterViewChecked\n} from '@angular/core';\nimport {\n  PDFDocumentProxy,\n  PDFViewerParams,\n  PDFPageProxy,\n  PDFSource,\n  PDFProgressData,\n  PDFPromise\n} from 'pdfjs-dist';\n\nimport { createEventBus } from '../utils/event-bus-utils';\n\nlet PDFJS: any;\nlet PDFJSViewer: any;\n\nfunction isSSR() {\n  return typeof window === 'undefined';\n}\n\nif (!isSSR()) {\n  PDFJS = require('pdfjs-dist/build/pdf');\n  PDFJSViewer = require('pdfjs-dist/web/pdf_viewer');\n\n  PDFJS.verbosity = PDFJS.VerbosityLevel.ERRORS;\n}\n\nexport enum RenderTextMode {\n  DISABLED,\n  ENABLED,\n  ENHANCED\n}\n\n@Component({\n  selector: 'pdf-viewer',\n  template: `\n    <div #pdfViewerContainer class=\"ng2-pdf-viewer-container\">\n      <div class=\"pdfViewer\"></div>\n    </div>\n  `,\n  styleUrls: ['./pdf-viewer.component.scss']\n})\nexport class PdfViewerComponent\n  implements OnChanges, OnInit, OnDestroy, AfterViewChecked {\n  @ViewChild('pdfViewerContainer') pdfViewerContainer;\n  private isVisible: boolean = false;\n\n  static CSS_UNITS: number = 96.0 / 72.0;\n  static BORDER_WIDTH: number = 9;\n\n  private pdfMultiPageViewer: any;\n  private pdfMultiPageLinkService: any;\n  private pdfMultiPageFindController: any;\n\n  private pdfSinglePageViewer: any;\n  private pdfSinglePageLinkService: any;\n  private pdfSinglePageFindController: any;\n\n  private _cMapsUrl =\n    typeof PDFJS !== 'undefined'\n      ? `https://unpkg.com/pdfjs-dist@${(PDFJS as any).version}/cmaps/`\n      : null;\n  private _renderText = true;\n  private _renderTextMode: RenderTextMode = RenderTextMode.ENABLED;\n  private _stickToPage = false;\n  private _originalSize = true;\n  private _pdf: PDFDocumentProxy;\n  private _page = 1;\n  private _zoom = 1;\n  private _zoomScale: 'page-height'|'page-fit'|'page-width' = 'page-width';\n  private _rotation = 0;\n  private _showAll = true;\n  private _canAutoResize = true;\n  private _fitToPage = false;\n  private _externalLinkTarget = 'blank';\n  private _showBorders = false;\n  private lastLoaded: string | Uint8Array | PDFSource;\n  private _latestScrolledPage: number;\n\n  private resizeTimeout: NodeJS.Timer;\n  private pageScrollTimeout: NodeJS.Timer;\n  private isInitialized = false;\n  private loadingTask: any;\n\n  @Output('after-load-complete') afterLoadComplete = new EventEmitter<\n    PDFDocumentProxy\n  >();\n  @Output('page-rendered') pageRendered = new EventEmitter<CustomEvent>();\n  @Output('text-layer-rendered') textLayerRendered = new EventEmitter<\n    CustomEvent\n  >();\n  @Output('error') onError = new EventEmitter<any>();\n  @Output('on-progress') onProgress = new EventEmitter<PDFProgressData>();\n  @Output() pageChange: EventEmitter<number> = new EventEmitter<number>(true);\n  @Input()\n  src: string | Uint8Array | PDFSource;\n\n  @Input('c-maps-url')\n  set cMapsUrl(cMapsUrl: string) {\n    this._cMapsUrl = cMapsUrl;\n  }\n\n @Input('page')\n  set page(_page) {\n    _page = parseInt(_page, 10) || 1;\n    const orginalPage = _page;\n\n    if (this._pdf) {\n      _page = this.getValidPageNumber(_page);\n    }\n\n    this._page = _page;\n    if (orginalPage !== _page) {\n      this.pageChange.emit(_page);\n    }\n  }\n\n  @Input('render-text')\n  set renderText(renderText: boolean) {\n    this._renderText = renderText;\n  }\n\n  @Input('render-text-mode')\n  set renderTextMode(renderTextMode: RenderTextMode) {\n    this._renderTextMode = renderTextMode;\n  }\n\n  @Input('original-size')\n  set originalSize(originalSize: boolean) {\n    this._originalSize = originalSize;\n  }\n\n  @Input('show-all')\n  set showAll(value: boolean) {\n    this._showAll = value;\n  }\n\n  @Input('stick-to-page')\n  set stickToPage(value: boolean) {\n    this._stickToPage = value;\n  }\n\n  @Input('zoom')\n  set zoom(value: number) {\n    if (value <= 0) {\n      return;\n    }\n\n    this._zoom = value;\n  }\n\n  get zoom() {\n    return this._zoom;\n  }\n\n  @Input('zoom-scale')\n  set zoomScale(value: 'page-height'|'page-fit' | 'page-width') {\n    this._zoomScale = value;\n  }\n\n  get zoomScale() {\n    return this._zoomScale;\n  }\n\n  @Input('rotation')\n  set rotation(value: number) {\n    if (!(typeof value === 'number' && value % 90 === 0)) {\n      console.warn('Invalid pages rotation angle.');\n      return;\n    }\n\n    this._rotation = value;\n  }\n\n  @Input('external-link-target')\n  set externalLinkTarget(value: string) {\n    this._externalLinkTarget = value;\n  }\n\n  @Input('autoresize')\n  set autoresize(value: boolean) {\n    this._canAutoResize = Boolean(value);\n  }\n\n  @Input('fit-to-page')\n  set fitToPage(value: boolean) {\n    this._fitToPage = Boolean(value);\n  }\n\n  @Input('show-borders')\n  set showBorders(value: boolean) {\n    this._showBorders = Boolean(value);\n  }\n\n  static getLinkTarget(type: string) {\n    switch (type) {\n      case 'blank':\n        return (<any>PDFJS).LinkTarget.BLANK;\n      case 'none':\n        return (<any>PDFJS).LinkTarget.NONE;\n      case 'self':\n        return (<any>PDFJS).LinkTarget.SELF;\n      case 'parent':\n        return (<any>PDFJS).LinkTarget.PARENT;\n      case 'top':\n        return (<any>PDFJS).LinkTarget.TOP;\n    }\n\n    return null;\n  }\n\n  static setExternalLinkTarget(type: string) {\n    const linkTarget = PdfViewerComponent.getLinkTarget(type);\n\n    if (linkTarget !== null) {\n      (<any>PDFJS).externalLinkTarget = linkTarget;\n    }\n  }\n\n  constructor(private element: ElementRef) {\n    if (isSSR()) {\n      return;\n    }\n\n    let pdfWorkerSrc: string;\n\n    if (\n      window.hasOwnProperty('pdfWorkerSrc') &&\n      typeof (window as any).pdfWorkerSrc === 'string' &&\n      (window as any).pdfWorkerSrc\n    ) {\n      pdfWorkerSrc = (window as any).pdfWorkerSrc;\n    } else {\n      pdfWorkerSrc = `https://cdnjs.cloudflare.com/ajax/libs/pdf.js/${\n        (PDFJS as any).version\n      }/pdf.worker.min.js`;\n    }\n\n    (PDFJS as any).GlobalWorkerOptions.workerSrc = pdfWorkerSrc;\n  }\n\n  ngAfterViewChecked(): void {\n    if (this.isInitialized) {\n      return;\n    }\n\n    const offset = this.pdfViewerContainer.nativeElement.offsetParent;\n\n    if (this.isVisible === true && offset == null) {\n      this.isVisible = false;\n      return;\n    }\n\n    if (this.isVisible === false && offset != null) {\n      this.isVisible = true;\n\n      setTimeout(() => {\n        this.ngOnInit();\n        this.ngOnChanges({ src: this.src } as any);\n      });\n    }\n  }\n\n  ngOnInit() {\n    if (!isSSR() && this.isVisible) {\n      this.isInitialized = true;\n      this.setupMultiPageViewer();\n      this.setupSinglePageViewer();\n    }\n  }\n\n  ngOnDestroy() {\n    this.clear();\n  }\n\n  @HostListener('window:resize', [])\n  public onPageResize() {\n    if (!this._canAutoResize || !this._pdf) {\n      return;\n    }\n\n    if (this.resizeTimeout) {\n      clearTimeout(this.resizeTimeout);\n    }\n\n    this.resizeTimeout = setTimeout(() => {\n      this.updateSize();\n    }, 100);\n  }\n\n  get pdfLinkService(): any {\n    return this._showAll\n      ? this.pdfMultiPageLinkService\n      : this.pdfSinglePageLinkService;\n  }\n\n  get pdfViewer(): any {\n    return this.getCurrentViewer();\n  }\n\n  get pdfFindController(): any {\n    return this._showAll\n      ? this.pdfMultiPageFindController\n      : this.pdfSinglePageFindController;\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    if (isSSR() || !this.isVisible) {\n      return;\n    }\n\n    if ('src' in changes) {\n      this.loadPDF();\n    } else if (this._pdf) {\n      if ('renderText' in changes) {\n        this.getCurrentViewer().textLayerMode = this._renderText\n          ? this._renderTextMode\n          : RenderTextMode.DISABLED;\n        this.resetPdfDocument();\n      } else if ('showAll' in changes) {\n        this.resetPdfDocument();\n      }\n      if ('page' in changes) {\n        if (changes['page'].currentValue === this._latestScrolledPage) {\n          return;\n        }\n\n        // New form of page changing: The viewer will now jump to the specified page when it is changed.\n        // This behavior is introducedby using the PDFSinglePageViewer\n        this.getCurrentViewer().scrollPageIntoView({ pageNumber: this._page });\n      }\n\n      this.update();\n    }\n  }\n\n  public updateSize() {\n    const currentViewer = this.getCurrentViewer();\n    this._pdf\n      .getPage(currentViewer.currentPageNumber)\n      .then((page: PDFPageProxy) => {\n        const rotation = this._rotation || page.rotate;\n        const viewportWidth =\n          (page as any).getViewport({\n            scale: this._zoom,\n            rotation\n          }).width * PdfViewerComponent.CSS_UNITS;\n        let scale = this._zoom;\n        let stickToPage = true;\n\n        // Scale the document when it shouldn't be in original size or doesn't fit into the viewport\n        if (\n          !this._originalSize ||\n          (this._fitToPage &&\n            viewportWidth > this.pdfViewerContainer.nativeElement.clientWidth)\n        ) {\n          const viewPort = (page as any).getViewport({ scale: 1, rotation });\n          scale = this.getScale(viewPort.width, viewPort.height);\n          stickToPage = !this._stickToPage;\n        }\n\n        currentViewer._setScale(scale, stickToPage);\n      });\n  }\n\n  public clear() {\n    if (this.loadingTask && !this.loadingTask.destroyed) {\n      this.loadingTask.destroy();\n    }\n\n    if (this._pdf) {\n      this._pdf.destroy();\n      this._pdf = null;\n      this.pdfMultiPageViewer.setDocument(null);\n      this.pdfSinglePageViewer.setDocument(null);\n\n      this.pdfMultiPageLinkService.setDocument(null, null);\n      this.pdfSinglePageLinkService.setDocument(null, null);\n\n      this.pdfMultiPageFindController.setDocument(null);\n      this.pdfSinglePageFindController.setDocument(null);\n    }\n  }\n\n  private setupMultiPageViewer() {\n    (PDFJS as any).disableTextLayer = !this._renderText;\n\n    PdfViewerComponent.setExternalLinkTarget(this._externalLinkTarget);\n\n    const eventBus = createEventBus(PDFJSViewer);\n\n    eventBus.on('pagerendered', e => {\n      this.pageRendered.emit(e);\n    });\n\n    eventBus.on('pagechanging', e => {\n      if (this.pageScrollTimeout) {\n        clearTimeout(this.pageScrollTimeout);\n      }\n\n      this.pageScrollTimeout = setTimeout(() => {\n        this._latestScrolledPage = e.pageNumber;\n        this.pageChange.emit(e.pageNumber);\n      }, 100);\n    });\n\n    eventBus.on('textlayerrendered', e => {\n      this.textLayerRendered.emit(e);\n    });\n\n    this.pdfMultiPageLinkService = new PDFJSViewer.PDFLinkService({ eventBus });\n    this.pdfMultiPageFindController = new PDFJSViewer.PDFFindController({\n      linkService: this.pdfMultiPageLinkService,\n      eventBus\n    });\n\n    const pdfOptions: PDFViewerParams | any = {\n      eventBus: eventBus,\n      container: this.element.nativeElement.querySelector('div'),\n      removePageBorders: !this._showBorders,\n      linkService: this.pdfMultiPageLinkService,\n      textLayerMode: this._renderText\n        ? this._renderTextMode\n        : RenderTextMode.DISABLED,\n      findController: this.pdfMultiPageFindController\n    };\n\n    this.pdfMultiPageViewer = new PDFJSViewer.PDFViewer(pdfOptions);\n    this.pdfMultiPageLinkService.setViewer(this.pdfMultiPageViewer);\n    this.pdfMultiPageFindController.setDocument(this._pdf);\n  }\n\n  private setupSinglePageViewer() {\n    (PDFJS as any).disableTextLayer = !this._renderText;\n\n    PdfViewerComponent.setExternalLinkTarget(this._externalLinkTarget);\n\n    const eventBus = createEventBus(PDFJSViewer);\n\n    eventBus.on('pagechanging', e => {\n      if (e.pageNumber != this._page) {\n        this.page = e.pageNumber;\n      }\n    });\n\n    eventBus.on('pagerendered', e => {\n      this.pageRendered.emit(e);\n    });\n\n    eventBus.on('textlayerrendered', e => {\n      this.textLayerRendered.emit(e);\n    });\n\n    this.pdfSinglePageLinkService = new PDFJSViewer.PDFLinkService({\n      eventBus\n    });\n    this.pdfSinglePageFindController = new PDFJSViewer.PDFFindController({\n      linkService: this.pdfSinglePageLinkService,\n      eventBus\n    });\n\n    const pdfOptions: PDFViewerParams | any = {\n      eventBus: eventBus,\n      container: this.element.nativeElement.querySelector('div'),\n      removePageBorders: !this._showBorders,\n      linkService: this.pdfSinglePageLinkService,\n      textLayerMode: this._renderText\n        ? this._renderTextMode\n        : RenderTextMode.DISABLED,\n      findController: this.pdfSinglePageFindController\n    };\n\n    this.pdfSinglePageViewer = new PDFJSViewer.PDFSinglePageViewer(pdfOptions);\n    this.pdfSinglePageLinkService.setViewer(this.pdfSinglePageViewer);\n    this.pdfSinglePageFindController.setDocument(this._pdf);\n\n    this.pdfSinglePageViewer._currentPageNumber = this._page;\n  }\n\n  private getValidPageNumber(page: number): number {\n    if (page < 1) {\n      return 1;\n    }\n\n    if (page > this._pdf.numPages) {\n      return this._pdf.numPages;\n    }\n\n    return page;\n  }\n\n  private getDocumentParams() {\n    const srcType = typeof this.src;\n\n    if (!this._cMapsUrl) {\n      return this.src;\n    }\n\n    const params: any = {\n      cMapUrl: this._cMapsUrl,\n      cMapPacked: true\n    };\n\n    if (srcType === 'string') {\n      params.url = this.src;\n    } else if (srcType === 'object') {\n      if ((this.src as any).byteLength !== undefined) {\n        params.data = this.src;\n      } else {\n        Object.assign(params, this.src);\n      }\n    }\n\n    return params;\n  }\n\n  private loadPDF() {\n    if (!this.src) {\n      return;\n    }\n\n    if (this.lastLoaded === this.src) {\n      this.update();\n      return;\n    }\n\n    this.clear();\n\n    this.loadingTask = (PDFJS as any).getDocument(this.getDocumentParams());\n\n    this.loadingTask.onProgress = (progressData: PDFProgressData) => {\n      this.onProgress.emit(progressData);\n    };\n\n    const src = this.src;\n    (<PDFPromise<PDFDocumentProxy>>this.loadingTask.promise).then(\n      (pdf: PDFDocumentProxy) => {\n        this._pdf = pdf;\n        this.lastLoaded = src;\n\n        this.afterLoadComplete.emit(pdf);\n\n        if (!this.pdfMultiPageViewer) {\n          this.setupMultiPageViewer();\n          this.setupSinglePageViewer();\n        }\n\n        this.resetPdfDocument();\n\n        this.update();\n      },\n      (error: any) => {\n        this.onError.emit(error);\n      }\n    );\n  }\n\n  private update() {\n    this.page = this._page;\n\n    this.render();\n  }\n\n  private render() {\n    this._page = this.getValidPageNumber(this._page);\n    const currentViewer = this.getCurrentViewer();\n\n    if (\n      this._rotation !== 0 ||\n      currentViewer.pagesRotation !== this._rotation\n    ) {\n      setTimeout(() => {\n        currentViewer.pagesRotation = this._rotation;\n      });\n    }\n\n    if (this._stickToPage) {\n      setTimeout(() => {\n        currentViewer.currentPageNumber = this._page;\n      });\n    }\n\n    this.updateSize();\n  }\n\n  private getScale(viewportWidth: number, viewportHeight: number) {\n    const borderSize = (this._showBorders ? 2 * PdfViewerComponent.BORDER_WIDTH : 0);\n    const pdfContainerWidth = this.pdfViewerContainer.nativeElement.clientWidth - borderSize;\n    const pdfContainerHeight = this.pdfViewerContainer.nativeElement.clientHeight - borderSize;\n\n    if (pdfContainerHeight === 0 || viewportHeight === 0 || pdfContainerWidth === 0 || viewportWidth === 0) {\n      return 1;\n    }\n\n    let ratio = 1;\n    switch (this._zoomScale) {\n      case 'page-fit':\n        ratio = Math.min((pdfContainerHeight / viewportHeight), (pdfContainerWidth / viewportWidth));\n        break;\n      case 'page-height':\n        ratio = (pdfContainerHeight / viewportHeight);\n        break;\n      case 'page-width':\n      default:\n        ratio = (pdfContainerWidth / viewportWidth);\n        break;\n    }\n\n    return (this._zoom * ratio) / PdfViewerComponent.CSS_UNITS;\n  }\n\n  private getCurrentViewer(): any {\n    return this._showAll ? this.pdfMultiPageViewer : this.pdfSinglePageViewer;\n  }\n\n  private resetPdfDocument() {\n    this.pdfFindController.setDocument(this._pdf);\n\n    if (this._showAll) {\n      this.pdfSinglePageViewer.setDocument(null);\n      this.pdfSinglePageLinkService.setDocument(null);\n\n      this.pdfMultiPageViewer.setDocument(this._pdf);\n      this.pdfMultiPageLinkService.setDocument(this._pdf, null);\n    } else {\n      this.pdfMultiPageViewer.setDocument(null);\n      this.pdfMultiPageLinkService.setDocument(null);\n\n      this.pdfSinglePageViewer.setDocument(this._pdf);\n      this.pdfSinglePageLinkService.setDocument(this._pdf, null);\n    }\n  }\n}\n","/**\n * Created by vadimdez on 01/11/2016.\n */\nimport { NgModule } from '@angular/core';\n\nimport { PdfViewerComponent } from './pdf-viewer.component';\nimport { PDFJSStatic } from 'pdfjs-dist';\n\ndeclare global {\n  const PDFJS: PDFJSStatic;\n}\n\nexport {\n  PDFJSStatic,\n  PDFDocumentProxy,\n  PDFViewerParams,\n  PDFPageProxy,\n  PDFSource,\n  PDFProgressData,\n  PDFPromise\n} from 'pdfjs-dist';\n\n@NgModule({\n  declarations: [PdfViewerComponent],\n  exports: [PdfViewerComponent]\n})\nexport class PdfViewerModule {}\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public_api';\n","import { Subscriber } from '../Subscriber';\nimport { ArgumentOutOfRangeError } from '../util/ArgumentOutOfRangeError';\nimport { empty } from '../observable/empty';\nexport function take(count) {\n    return (source) => {\n        if (count === 0) {\n            return empty();\n        }\n        else {\n            return source.lift(new TakeOperator(count));\n        }\n    };\n}\nclass TakeOperator {\n    constructor(total) {\n        this.total = total;\n        if (this.total < 0) {\n            throw new ArgumentOutOfRangeError;\n        }\n    }\n    call(subscriber, source) {\n        return source.subscribe(new TakeSubscriber(subscriber, this.total));\n    }\n}\nclass TakeSubscriber extends Subscriber {\n    constructor(destination, total) {\n        super(destination);\n        this.total = total;\n        this.count = 0;\n    }\n    _next(value) {\n        const total = this.total;\n        const count = ++this.count;\n        if (count <= total) {\n            this.destination.next(value);\n            if (count === total) {\n                this.destination.complete();\n                this.unsubscribe();\n            }\n        }\n    }\n}\n//# sourceMappingURL=take.js.map","var arrayWithHoles = require(\"./arrayWithHoles\");\n\nvar iterableToArrayLimit = require(\"./iterableToArrayLimit\");\n\nvar unsupportedIterableToArray = require(\"./unsupportedIterableToArray\");\n\nvar nonIterableRest = require(\"./nonIterableRest\");\n\nfunction _slicedToArray(arr, i) {\n  return arrayWithHoles(arr) || iterableToArrayLimit(arr, i) || unsupportedIterableToArray(arr, i) || nonIterableRest();\n}\n\nmodule.exports = _slicedToArray;","import { SimpleOuterSubscriber, SimpleInnerSubscriber, innerSubscribe } from '../innerSubscribe';\nexport function catchError(selector) {\n    return function catchErrorOperatorFunction(source) {\n        const operator = new CatchOperator(selector);\n        const caught = source.lift(operator);\n        return (operator.caught = caught);\n    };\n}\nclass CatchOperator {\n    constructor(selector) {\n        this.selector = selector;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new CatchSubscriber(subscriber, this.selector, this.caught));\n    }\n}\nclass CatchSubscriber extends SimpleOuterSubscriber {\n    constructor(destination, selector, caught) {\n        super(destination);\n        this.selector = selector;\n        this.caught = caught;\n    }\n    error(err) {\n        if (!this.isStopped) {\n            let result;\n            try {\n                result = this.selector(err, this.caught);\n            }\n            catch (err2) {\n                super.error(err2);\n                return;\n            }\n            this._unsubscribeAndRecycle();\n            const innerSubscriber = new SimpleInnerSubscriber(this);\n            this.add(innerSubscriber);\n            const innerSubscription = innerSubscribe(result, innerSubscriber);\n            if (innerSubscription !== innerSubscriber) {\n                this.add(innerSubscription);\n            }\n        }\n    }\n}\n//# sourceMappingURL=catchError.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Ignores source values for `duration` milliseconds, then emits the most recent\n * value from the source Observable, then repeats this process.\n *\n * <span class=\"informal\">When it sees a source values, it ignores that plus\n * the next ones for `duration` milliseconds, and then it emits the most recent\n * value from the source.</span>\n *\n * <img src=\"./img/auditTime.png\" width=\"100%\">\n *\n * `auditTime` is similar to `throttleTime`, but emits the last value from the\n * silenced time window, instead of the first value. `auditTime` emits the most\n * recent value from the source Observable on the output Observable as soon as\n * its internal timer becomes disabled, and ignores source values while the\n * timer is enabled. Initially, the timer is disabled. As soon as the first\n * source value arrives, the timer is enabled. After `duration` milliseconds (or\n * the time unit determined internally by the optional `scheduler`) has passed,\n * the timer is disabled, then the most recent source value is emitted on the\n * output Observable, and this process repeats for the next source value.\n * Optionally takes a {@link IScheduler} for managing timers.\n *\n * @example <caption>Emit clicks at a rate of at most one click per second</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.auditTime(1000);\n * result.subscribe(x => console.log(x));\n *\n * @see {@link audit}\n * @see {@link debounceTime}\n * @see {@link delay}\n * @see {@link sampleTime}\n * @see {@link throttleTime}\n *\n * @param {number} duration Time to wait before emitting the most recent source\n * value, measured in milliseconds or the time unit determined internally\n * by the optional `scheduler`.\n * @param {Scheduler} [scheduler=async] The {@link IScheduler} to use for\n * managing the timers that handle the rate-limiting behavior.\n * @return {Observable<T>} An Observable that performs rate-limiting of\n * emissions from the source Observable.\n * @method auditTime\n * @owner Observable\n */\nfunction auditTime(duration, scheduler) {\n    if (scheduler === void 0) { scheduler = rxjs_1.asyncScheduler; }\n    return operators_1.auditTime(duration, scheduler)(this);\n}\nexports.auditTime = auditTime;\n//# sourceMappingURL=auditTime.js.map","export default function _assertThisInitialized(self) {\n  if (self === void 0) {\n    throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n  }\n\n  return self;\n}","import { concat } from '../observable/concat';\nimport { isScheduler } from '../util/isScheduler';\nexport function startWith(...array) {\n    const scheduler = array[array.length - 1];\n    if (isScheduler(scheduler)) {\n        array.pop();\n        return (source) => concat(array, source, scheduler);\n    }\n    else {\n        return (source) => concat(array, source);\n    }\n}\n//# sourceMappingURL=startWith.js.map","import setPrototypeOf from \"./setPrototypeOf\";\nexport default function _inherits(subClass, superClass) {\n  if (typeof superClass !== \"function\" && superClass !== null) {\n    throw new TypeError(\"Super expression must either be null or a function\");\n  }\n\n  subClass.prototype = Object.create(superClass && superClass.prototype, {\n    constructor: {\n      value: subClass,\n      writable: true,\n      configurable: true\n    }\n  });\n  if (superClass) setPrototypeOf(subClass, superClass);\n}","import { ZipOperator } from '../observable/zip';\nexport function zipAll(project) {\n    return (source) => source.lift(new ZipOperator(project));\n}\n//# sourceMappingURL=zipAll.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar throttle_1 = require(\"../../operator/throttle\");\nrxjs_1.Observable.prototype.throttle = throttle_1.throttle;\n//# sourceMappingURL=throttle.js.map","import { FindValueOperator } from '../operators/find';\nexport function findIndex(predicate, thisArg) {\n    return (source) => source.lift(new FindValueOperator(predicate, source, true, thisArg));\n}\n//# sourceMappingURL=findIndex.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar concat_1 = require(\"../../operator/concat\");\nrxjs_1.Observable.prototype.concat = concat_1.concat;\n//# sourceMappingURL=concat.js.map","import { Subject } from '../Subject';\nimport { Subscription } from '../Subscription';\nimport { SubscriptionLoggable } from './SubscriptionLoggable';\nimport { applyMixins } from '../util/applyMixins';\nexport class HotObservable extends Subject {\n    constructor(messages, scheduler) {\n        super();\n        this.messages = messages;\n        this.subscriptions = [];\n        this.scheduler = scheduler;\n    }\n    _subscribe(subscriber) {\n        const subject = this;\n        const index = subject.logSubscribedFrame();\n        const subscription = new Subscription();\n        subscription.add(new Subscription(() => {\n            subject.logUnsubscribedFrame(index);\n        }));\n        subscription.add(super._subscribe(subscriber));\n        return subscription;\n    }\n    setup() {\n        const subject = this;\n        const messagesLength = subject.messages.length;\n        for (var i = 0; i < messagesLength; i++) {\n            (() => {\n                var message = subject.messages[i];\n                subject.scheduler.schedule(() => { message.notification.observe(subject); }, message.frame);\n            })();\n        }\n    }\n}\napplyMixins(HotObservable, [SubscriptionLoggable]);\n//# sourceMappingURL=HotObservable.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar dematerialize_1 = require(\"../../operator/dematerialize\");\nrxjs_1.Observable.prototype.dematerialize = dematerialize_1.dematerialize;\n//# sourceMappingURL=dematerialize.js.map","import arrayWithoutHoles from \"./arrayWithoutHoles\";\nimport iterableToArray from \"./iterableToArray\";\nimport unsupportedIterableToArray from \"./unsupportedIterableToArray\";\nimport nonIterableSpread from \"./nonIterableSpread\";\nexport default function _toConsumableArray(arr) {\n  return arrayWithoutHoles(arr) || iterableToArray(arr) || unsupportedIterableToArray(arr) || nonIterableSpread();\n}","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar max_1 = require(\"../../operator/max\");\nrxjs_1.Observable.prototype.max = max_1.max;\n//# sourceMappingURL=max.js.map","import { Subscriber } from '../Subscriber';\nimport { async } from '../scheduler/async';\nexport function debounceTime(dueTime, scheduler = async) {\n    return (source) => source.lift(new DebounceTimeOperator(dueTime, scheduler));\n}\nclass DebounceTimeOperator {\n    constructor(dueTime, scheduler) {\n        this.dueTime = dueTime;\n        this.scheduler = scheduler;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new DebounceTimeSubscriber(subscriber, this.dueTime, this.scheduler));\n    }\n}\nclass DebounceTimeSubscriber extends Subscriber {\n    constructor(destination, dueTime, scheduler) {\n        super(destination);\n        this.dueTime = dueTime;\n        this.scheduler = scheduler;\n        this.debouncedSubscription = null;\n        this.lastValue = null;\n        this.hasValue = false;\n    }\n    _next(value) {\n        this.clearDebounce();\n        this.lastValue = value;\n        this.hasValue = true;\n        this.add(this.debouncedSubscription = this.scheduler.schedule(dispatchNext, this.dueTime, this));\n    }\n    _complete() {\n        this.debouncedNext();\n        this.destination.complete();\n    }\n    debouncedNext() {\n        this.clearDebounce();\n        if (this.hasValue) {\n            const { lastValue } = this;\n            this.lastValue = null;\n            this.hasValue = false;\n            this.destination.next(lastValue);\n        }\n    }\n    clearDebounce() {\n        const debouncedSubscription = this.debouncedSubscription;\n        if (debouncedSubscription !== null) {\n            this.remove(debouncedSubscription);\n            debouncedSubscription.unsubscribe();\n            this.debouncedSubscription = null;\n        }\n    }\n}\nfunction dispatchNext(subscriber) {\n    subscriber.debouncedNext();\n}\n//# sourceMappingURL=debounceTime.js.map","import { Subscriber } from '../Subscriber';\nexport function scan(accumulator, seed) {\n    let hasSeed = false;\n    if (arguments.length >= 2) {\n        hasSeed = true;\n    }\n    return function scanOperatorFunction(source) {\n        return source.lift(new ScanOperator(accumulator, seed, hasSeed));\n    };\n}\nclass ScanOperator {\n    constructor(accumulator, seed, hasSeed = false) {\n        this.accumulator = accumulator;\n        this.seed = seed;\n        this.hasSeed = hasSeed;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new ScanSubscriber(subscriber, this.accumulator, this.seed, this.hasSeed));\n    }\n}\nclass ScanSubscriber extends Subscriber {\n    constructor(destination, accumulator, _seed, hasSeed) {\n        super(destination);\n        this.accumulator = accumulator;\n        this._seed = _seed;\n        this.hasSeed = hasSeed;\n        this.index = 0;\n    }\n    get seed() {\n        return this._seed;\n    }\n    set seed(value) {\n        this.hasSeed = true;\n        this._seed = value;\n    }\n    _next(value) {\n        if (!this.hasSeed) {\n            this.seed = value;\n            this.destination.next(value);\n        }\n        else {\n            return this._tryNext(value);\n        }\n    }\n    _tryNext(value) {\n        const index = this.index++;\n        let result;\n        try {\n            result = this.accumulator(this.seed, value, index);\n        }\n        catch (err) {\n            this.destination.error(err);\n        }\n        this.seed = result;\n        this.destination.next(result);\n    }\n}\n//# sourceMappingURL=scan.js.map","export function noop() { }\n//# sourceMappingURL=noop.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar every_1 = require(\"../../operator/every\");\nrxjs_1.Observable.prototype.every = every_1.every;\n//# sourceMappingURL=every.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Converts a higher-order Observable into a first-order Observable which\n * concurrently delivers all values that are emitted on the inner Observables.\n *\n * <span class=\"informal\">Flattens an Observable-of-Observables.</span>\n *\n * <img src=\"./img/mergeAll.png\" width=\"100%\">\n *\n * `mergeAll` subscribes to an Observable that emits Observables, also known as\n * a higher-order Observable. Each time it observes one of these emitted inner\n * Observables, it subscribes to that and delivers all the values from the\n * inner Observable on the output Observable. The output Observable only\n * completes once all inner Observables have completed. Any error delivered by\n * a inner Observable will be immediately emitted on the output Observable.\n *\n * @example <caption>Spawn a new interval Observable for each click event, and blend their outputs as one Observable</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var higherOrder = clicks.map((ev) => Rx.Observable.interval(1000));\n * var firstOrder = higherOrder.mergeAll();\n * firstOrder.subscribe(x => console.log(x));\n *\n * @example <caption>Count from 0 to 9 every second for each click, but only allow 2 concurrent timers</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var higherOrder = clicks.map((ev) => Rx.Observable.interval(1000).take(10));\n * var firstOrder = higherOrder.mergeAll(2);\n * firstOrder.subscribe(x => console.log(x));\n *\n * @see {@link combineAll}\n * @see {@link concatAll}\n * @see {@link exhaust}\n * @see {@link merge}\n * @see {@link mergeMap}\n * @see {@link mergeMapTo}\n * @see {@link mergeScan}\n * @see {@link switch}\n * @see {@link zipAll}\n *\n * @param {number} [concurrent=Number.POSITIVE_INFINITY] Maximum number of inner\n * Observables being subscribed to concurrently.\n * @return {Observable} An Observable that emits values coming from all the\n * inner Observables emitted by the source Observable.\n * @method mergeAll\n * @owner Observable\n */\nfunction mergeAll(concurrent) {\n    if (concurrent === void 0) { concurrent = Number.POSITIVE_INFINITY; }\n    return operators_1.mergeAll(concurrent)(this);\n}\nexports.mergeAll = mergeAll;\n//# sourceMappingURL=mergeAll.js.map","import getPrototypeOf from \"./getPrototypeOf\";\nimport isNativeReflectConstruct from \"./isNativeReflectConstruct\";\nimport possibleConstructorReturn from \"./possibleConstructorReturn\";\nexport default function _createSuper(Derived) {\n  var hasNativeReflectConstruct = isNativeReflectConstruct();\n  return function _createSuperInternal() {\n    var Super = getPrototypeOf(Derived),\n        result;\n\n    if (hasNativeReflectConstruct) {\n      var NewTarget = getPrototypeOf(this).constructor;\n      result = Reflect.construct(Super, arguments, NewTarget);\n    } else {\n      result = Super.apply(this, arguments);\n    }\n\n    return possibleConstructorReturn(this, result);\n  };\n}","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/* tslint:enable:max-line-length */\n/**\n * Returns an Observable that emits the items you specify as arguments before it begins to emit\n * items emitted by the source Observable.\n *\n * <img src=\"./img/startWith.png\" width=\"100%\">\n *\n * @param {...T} values - Items you want the modified Observable to emit first.\n * @param {Scheduler} [scheduler] - A {@link IScheduler} to use for scheduling\n * the emissions of the `next` notifications.\n * @return {Observable} An Observable that emits the items in the specified Iterable and then emits the items\n * emitted by the source Observable.\n * @method startWith\n * @owner Observable\n */\nfunction startWith() {\n    var array = [];\n    for (var _i = 0; _i < arguments.length; _i++) {\n        array[_i] = arguments[_i];\n    }\n    return operators_1.startWith.apply(void 0, array)(this);\n}\nexports.startWith = startWith;\n//# sourceMappingURL=startWith.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar debounce_1 = require(\"../../operator/debounce\");\nrxjs_1.Observable.prototype.debounce = debounce_1.debounce;\n//# sourceMappingURL=debounce.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Emits a value from the source Observable only after a particular time span\n * has passed without another source emission.\n *\n * <span class=\"informal\">It's like {@link delay}, but passes only the most\n * recent value from each burst of emissions.</span>\n *\n * <img src=\"./img/debounceTime.png\" width=\"100%\">\n *\n * `debounceTime` delays values emitted by the source Observable, but drops\n * previous pending delayed emissions if a new value arrives on the source\n * Observable. This operator keeps track of the most recent value from the\n * source Observable, and emits that only when `dueTime` enough time has passed\n * without any other value appearing on the source Observable. If a new value\n * appears before `dueTime` silence occurs, the previous value will be dropped\n * and will not be emitted on the output Observable.\n *\n * This is a rate-limiting operator, because it is impossible for more than one\n * value to be emitted in any time window of duration `dueTime`, but it is also\n * a delay-like operator since output emissions do not occur at the same time as\n * they did on the source Observable. Optionally takes a {@link IScheduler} for\n * managing timers.\n *\n * @example <caption>Emit the most recent click after a burst of clicks</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.debounceTime(1000);\n * result.subscribe(x => console.log(x));\n *\n * @see {@link auditTime}\n * @see {@link debounce}\n * @see {@link delay}\n * @see {@link sampleTime}\n * @see {@link throttleTime}\n *\n * @param {number} dueTime The timeout duration in milliseconds (or the time\n * unit determined internally by the optional `scheduler`) for the window of\n * time required to wait for emission silence before emitting the most recent\n * source value.\n * @param {Scheduler} [scheduler=asyncScheduler] The {@link SchedulerLike} to use for\n * managing the timers that handle the timeout for each value.\n * @return {Observable} An Observable that delays the emissions of the source\n * Observable by the specified `dueTime`, and may drop some values if they occur\n * too frequently.\n * @method debounceTime\n * @owner Observable\n */\nfunction debounceTime(dueTime, scheduler) {\n    if (scheduler === void 0) { scheduler = rxjs_1.asyncScheduler; }\n    return operators_1.debounceTime(dueTime, scheduler)(this);\n}\nexports.debounceTime = debounceTime;\n//# sourceMappingURL=debounceTime.js.map","var getPrototypeOf = require(\"./getPrototypeOf\");\n\nvar isNativeReflectConstruct = require(\"./isNativeReflectConstruct\");\n\nvar possibleConstructorReturn = require(\"./possibleConstructorReturn\");\n\nfunction _createSuper(Derived) {\n  var hasNativeReflectConstruct = isNativeReflectConstruct();\n  return function _createSuperInternal() {\n    var Super = getPrototypeOf(Derived),\n        result;\n\n    if (hasNativeReflectConstruct) {\n      var NewTarget = getPrototypeOf(this).constructor;\n      result = Reflect.construct(Super, arguments, NewTarget);\n    } else {\n      result = Super.apply(this, arguments);\n    }\n\n    return possibleConstructorReturn(this, result);\n  };\n}\n\nmodule.exports = _createSuper;","import { isScheduler } from '../util/isScheduler';\nimport { fromArray } from './fromArray';\nimport { scheduleArray } from '../scheduled/scheduleArray';\nexport function of(...args) {\n    let scheduler = args[args.length - 1];\n    if (isScheduler(scheduler)) {\n        args.pop();\n        return scheduleArray(args, scheduler);\n    }\n    else {\n        return fromArray(args);\n    }\n}\n//# sourceMappingURL=of.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\nvar internal_compatibility_1 = require(\"rxjs/internal-compatibility\");\n/**\n * Emits a value from the source Observable, then ignores subsequent source\n * values for a duration determined by another Observable, then repeats this\n * process.\n *\n * <span class=\"informal\">It's like {@link throttleTime}, but the silencing\n * duration is determined by a second Observable.</span>\n *\n * <img src=\"./img/throttle.png\" width=\"100%\">\n *\n * `throttle` emits the source Observable values on the output Observable\n * when its internal timer is disabled, and ignores source values when the timer\n * is enabled. Initially, the timer is disabled. As soon as the first source\n * value arrives, it is forwarded to the output Observable, and then the timer\n * is enabled by calling the `durationSelector` function with the source value,\n * which returns the \"duration\" Observable. When the duration Observable emits a\n * value or completes, the timer is disabled, and this process repeats for the\n * next source value.\n *\n * @example <caption>Emit clicks at a rate of at most one click per second</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.throttle(ev => Rx.Observable.interval(1000));\n * result.subscribe(x => console.log(x));\n *\n * @see {@link audit}\n * @see {@link debounce}\n * @see {@link delayWhen}\n * @see {@link sample}\n * @see {@link throttleTime}\n *\n * @param {function(value: T): SubscribableOrPromise} durationSelector A function\n * that receives a value from the source Observable, for computing the silencing\n * duration for each source value, returned as an Observable or a Promise.\n * @param {Object} config a configuration object to define `leading` and `trailing` behavior. Defaults\n * to `{ leading: true, trailing: false }`.\n * @return {Observable<T>} An Observable that performs the throttle operation to\n * limit the rate of emissions from the source.\n * @method throttle\n * @owner Observable\n */\nfunction throttle(durationSelector, config) {\n    if (config === void 0) { config = internal_compatibility_1.defaultThrottleConfig; }\n    return operators_1.throttle(durationSelector, config)(this);\n}\nexports.throttle = throttle;\n//# sourceMappingURL=throttle.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar skipLast_1 = require(\"../../operator/skipLast\");\nrxjs_1.Observable.prototype.skipLast = skipLast_1.skipLast;\n//# sourceMappingURL=skipLast.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar sample_1 = require(\"../../operator/sample\");\nrxjs_1.Observable.prototype.sample = sample_1.sample;\n//# sourceMappingURL=sample.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/* tslint:enable:max-line-length */\n/**\n * @param bufferSize\n * @param windowTime\n * @param selectorOrScheduler\n * @param scheduler\n * @return {Observable<T> | ConnectableObservable<T>}\n * @method publishReplay\n * @owner Observable\n */\nfunction publishReplay(bufferSize, windowTime, selectorOrScheduler, scheduler) {\n    return operators_1.publishReplay(bufferSize, windowTime, selectorOrScheduler, scheduler)(this);\n}\nexports.publishReplay = publishReplay;\n//# sourceMappingURL=publishReplay.js.map","export function getSymbolIterator() {\n    if (typeof Symbol !== 'function' || !Symbol.iterator) {\n        return '@@iterator';\n    }\n    return Symbol.iterator;\n}\nexport const iterator = getSymbolIterator();\nexport const $$iterator = iterator;\n//# sourceMappingURL=iterator.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Ignores all items emitted by the source Observable and only passes calls of `complete` or `error`.\n *\n * <img src=\"./img/ignoreElements.png\" width=\"100%\">\n *\n * @return {Observable} An empty Observable that only calls `complete`\n * or `error`, based on which one is called by the source Observable.\n * @method ignoreElements\n * @owner Observable\n */\nfunction ignoreElements() {\n    return operators_1.ignoreElements()(this);\n}\nexports.ignoreElements = ignoreElements;\n//# sourceMappingURL=ignoreElements.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar combineAll_1 = require(\"../../operator/combineAll\");\nrxjs_1.Observable.prototype.combineAll = combineAll_1.combineAll;\n//# sourceMappingURL=combineAll.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Returns an Observable that mirrors the source Observable, but will call a specified function when\n * the source terminates on complete, error or unsubscribe.\n *\n * <span class=\"informal\">Ensure a given function will be called when a stream ends, no matter why it ended.</span>\n *\n * `finally` method accepts as a single parameter a function. This function does not accept any parameters and\n * should not return anything. It will be called whenever source Observable completes, errors or is unsubscribed,\n * which makes it good candidate to perform any necessary clean up or side effects when Observable terminates,\n * no matter how or why it terminated.\n *\n * Observable returned by `finally` will simply mirror source Observable - each time it is subscribed, source\n * Observable will be subscribed underneath.\n *\n * Note that behavior of `finally` will be repeated per every subscription, so if resulting Observable has\n * many subscribers, function passed to `finally` might be potentially called multiple times.\n *\n * Remember also that `finally` differs quite a lot from passing complete or error handler to {@link subscribe}. It will\n * return an Observable which can be further chained, while `subscribe` returns Subscription, basically ending Observable\n * chain. Function passed to `finally` will be called also when consumer of resulting Observable unsubscribes from it,\n * while handlers passed to `subscribe` will not (even complete handler). But most importantly, `finally` does not start\n * an execution of source Observable, like `subscribe` does, allowing you to set up all necessary hooks before\n * passing Observable further, even without specific knowledge how or when it will be used.\n *\n *\n * @example <caption>Call finally after complete notification</caption>\n * Rx.Observable.of(1, 2, 3)\n * .finally(() => console.log('I was finalized!'))\n * .map(x => x * 2) // `finally` returns an Observable, so we still can chain operators.\n * .subscribe(\n *   val => console.log(val),\n *   err => {},\n *   () => console.log('I completed!')\n * );\n *\n * // Logs:\n * // 1\n * // 2\n * // 3\n * // \"I completed!\"\n * // \"I was finalized!\"\n *\n *\n *\n * @example <caption>Call finally after consumer unsubscribes</caption>\n * const o = Rx.Observable.interval(1000)\n * .finally(() => console.log('Timer stopped'));\n *\n * const subscription = o.subscribe(\n *   val => console.log(val),\n *   err => {},\n *   () => console.log('Complete!') // Will not be called, since complete handler\n * );                               // does not react to unsubscription, just to\n *                                  // complete notification sent by the Observable itself.\n *\n * setTimeout(() => subscription.unsubscribe(), 2500);\n *\n * // Logs:\n * // 0 after 1s\n * // 1 after 2s\n * // \"Timer stopped\" after 2.5s\n *\n * @see {@link using}\n *\n * @param {function} callback Function to be called when source terminates (completes, errors or is unsubscribed).\n * @return {Observable} An Observable that mirrors the source, but will call the specified function on termination.\n * @method finally\n * @name finally\n * @owner Observable\n */\nfunction _finally(callback) {\n    return operators_1.finalize(callback)(this);\n}\nexports._finally = _finally;\n//# sourceMappingURL=finally.js.map","\"use strict\";\nfunction __export(m) {\n    for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];\n}\nObject.defineProperty(exports, \"__esModule\", { value: true });\n__export(require(\"rxjs-compat\"));\n//# sourceMappingURL=Rx.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable, Optional, SkipSelf} from '@angular/core';\nimport {Subject} from 'rxjs';\n\n\n/**\n * To modify the labels and text displayed, create a new instance of MatPaginatorIntl and\n * include it in a custom provider\n */\n@Injectable({providedIn: 'root'})\nexport class MatPaginatorIntl {\n  /**\n   * Stream to emit from when labels are changed. Use this to notify components when the labels have\n   * changed after initialization.\n   */\n  readonly changes: Subject<void> = new Subject<void>();\n\n  /** A label for the page size selector. */\n  itemsPerPageLabel: string = 'Items per page:';\n\n  /** A label for the button that increments the current page. */\n  nextPageLabel: string = 'Next page';\n\n  /** A label for the button that decrements the current page. */\n  previousPageLabel: string = 'Previous page';\n\n  /** A label for the button that moves to the first page. */\n  firstPageLabel: string = 'First page';\n\n  /** A label for the button that moves to the last page. */\n  lastPageLabel: string = 'Last page';\n\n  /** A label for the range of items within the current page and the length of the whole list. */\n  getRangeLabel: (page: number, pageSize: number, length: number) => string =\n    (page: number, pageSize: number, length: number) => {\n      if (length == 0 || pageSize == 0) { return `0 of ${length}`; }\n\n      length = Math.max(length, 0);\n\n      const startIndex = page * pageSize;\n\n      // If the start index exceeds the list length, do not try and fix the end index to the end.\n      const endIndex = startIndex < length ?\n          Math.min(startIndex + pageSize, length) :\n          startIndex + pageSize;\n\n      return `${startIndex + 1} – ${endIndex} of ${length}`;\n    }\n}\n\n/** @docs-private */\nexport function MAT_PAGINATOR_INTL_PROVIDER_FACTORY(parentIntl: MatPaginatorIntl) {\n  return parentIntl || new MatPaginatorIntl();\n}\n\n/** @docs-private */\nexport const MAT_PAGINATOR_INTL_PROVIDER = {\n  // If there is already an MatPaginatorIntl available, use that. Otherwise, provide a new one.\n  provide: MatPaginatorIntl,\n  deps: [[new Optional(), new SkipSelf(), MatPaginatorIntl]],\n  useFactory: MAT_PAGINATOR_INTL_PROVIDER_FACTORY\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  coerceNumberProperty,\n  coerceBooleanProperty,\n  BooleanInput,\n  NumberInput\n} from '@angular/cdk/coercion';\nimport {\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  EventEmitter,\n  Input,\n  OnDestroy,\n  OnInit,\n  Output,\n  ViewEncapsulation,\n  InjectionToken,\n  Inject,\n  Optional,\n} from '@angular/core';\nimport {Subscription} from 'rxjs';\nimport {MatPaginatorIntl} from './paginator-intl';\nimport {\n  HasInitialized,\n  HasInitializedCtor,\n  mixinInitialized,\n  ThemePalette,\n  mixinDisabled,\n  CanDisableCtor,\n  CanDisable,\n} from '@angular/material/core';\nimport {MatFormFieldAppearance} from '@angular/material/form-field';\n\n/** The default page size if there is no page size and there are no provided page size options. */\nconst DEFAULT_PAGE_SIZE = 50;\n\n/**\n * Change event object that is emitted when the user selects a\n * different page size or navigates to another page.\n */\nexport class PageEvent {\n  /** The current page index. */\n  pageIndex: number;\n\n  /**\n   * Index of the page that was selected previously.\n   * @breaking-change 8.0.0 To be made into a required property.\n   */\n  previousPageIndex?: number;\n\n  /** The current page size */\n  pageSize: number;\n\n  /** The current total number of items being paged */\n  length: number;\n}\n\n\n/** Object that can be used to configure the default options for the paginator module. */\nexport interface MatPaginatorDefaultOptions {\n  /** Number of items to display on a page. By default set to 50. */\n  pageSize?: number;\n\n  /** The set of provided page size options to display to the user. */\n  pageSizeOptions?: number[];\n\n  /** Whether to hide the page size selection UI from the user. */\n  hidePageSize?: boolean;\n\n  /** Whether to show the first/last buttons UI to the user. */\n  showFirstLastButtons?: boolean;\n\n  /** The default form-field appearance to apply to the page size options selector. */\n  formFieldAppearance?: MatFormFieldAppearance;\n}\n\n/** Injection token that can be used to provide the default options for the paginator module. */\nexport const MAT_PAGINATOR_DEFAULT_OPTIONS =\n    new InjectionToken<MatPaginatorDefaultOptions>('MAT_PAGINATOR_DEFAULT_OPTIONS');\n\n// Boilerplate for applying mixins to MatPaginator.\n/** @docs-private */\nclass MatPaginatorBase {}\nconst _MatPaginatorBase: CanDisableCtor & HasInitializedCtor & typeof MatPaginatorBase =\n    mixinDisabled(mixinInitialized(MatPaginatorBase));\n\n/**\n * Component to provide navigation between paged information. Displays the size of the current\n * page, user-selectable options to change that size, what items are being shown, and\n * navigational button to go to the previous or next page.\n */\n@Component({\n  selector: 'mat-paginator',\n  exportAs: 'matPaginator',\n  templateUrl: 'paginator.html',\n  styleUrls: ['paginator.css'],\n  inputs: ['disabled'],\n  host: {\n    'class': 'mat-paginator',\n  },\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  encapsulation: ViewEncapsulation.None,\n})\nexport class MatPaginator extends _MatPaginatorBase implements OnInit, OnDestroy, CanDisable,\n  HasInitialized {\n  private _initialized: boolean;\n  private _intlChanges: Subscription;\n\n  /** Theme color to be used for the underlying form controls. */\n  @Input() color: ThemePalette;\n\n  /** The zero-based page index of the displayed list of items. Defaulted to 0. */\n  @Input()\n  get pageIndex(): number { return this._pageIndex; }\n  set pageIndex(value: number) {\n    this._pageIndex = Math.max(coerceNumberProperty(value), 0);\n    this._changeDetectorRef.markForCheck();\n  }\n  private _pageIndex = 0;\n\n  /** The length of the total number of items that are being paginated. Defaulted to 0. */\n  @Input()\n  get length(): number { return this._length; }\n  set length(value: number) {\n    this._length = coerceNumberProperty(value);\n    this._changeDetectorRef.markForCheck();\n  }\n  private _length = 0;\n\n  /** Number of items to display on a page. By default set to 50. */\n  @Input()\n  get pageSize(): number { return this._pageSize; }\n  set pageSize(value: number) {\n    this._pageSize = Math.max(coerceNumberProperty(value), 0);\n    this._updateDisplayedPageSizeOptions();\n  }\n  private _pageSize: number;\n\n  /** The set of provided page size options to display to the user. */\n  @Input()\n  get pageSizeOptions(): number[] { return this._pageSizeOptions; }\n  set pageSizeOptions(value: number[]) {\n    this._pageSizeOptions = (value || []).map(p => coerceNumberProperty(p));\n    this._updateDisplayedPageSizeOptions();\n  }\n  private _pageSizeOptions: number[] = [];\n\n  /** Whether to hide the page size selection UI from the user. */\n  @Input()\n  get hidePageSize(): boolean { return this._hidePageSize; }\n  set hidePageSize(value: boolean) {\n    this._hidePageSize = coerceBooleanProperty(value);\n  }\n  private _hidePageSize = false;\n\n\n  /** Whether to show the first/last buttons UI to the user. */\n  @Input()\n  get showFirstLastButtons(): boolean { return this._showFirstLastButtons; }\n  set showFirstLastButtons(value: boolean) {\n    this._showFirstLastButtons = coerceBooleanProperty(value);\n  }\n  private _showFirstLastButtons = false;\n\n  /** Event emitted when the paginator changes the page size or page index. */\n  @Output() readonly page: EventEmitter<PageEvent> = new EventEmitter<PageEvent>();\n\n  /** Displayed set of page size options. Will be sorted and include current page size. */\n  _displayedPageSizeOptions: number[];\n\n  /** If set, styles the \"page size\" form field with the designated style. */\n  _formFieldAppearance?: MatFormFieldAppearance;\n\n  constructor(public _intl: MatPaginatorIntl,\n              private _changeDetectorRef: ChangeDetectorRef,\n              @Optional() @Inject(MAT_PAGINATOR_DEFAULT_OPTIONS)\n                  defaults?: MatPaginatorDefaultOptions) {\n    super();\n    this._intlChanges = _intl.changes.subscribe(() => this._changeDetectorRef.markForCheck());\n\n    if (defaults) {\n      const {\n        pageSize,\n        pageSizeOptions,\n        hidePageSize,\n        showFirstLastButtons,\n        formFieldAppearance,\n      } = defaults;\n\n      if (pageSize != null) {\n        this._pageSize = pageSize;\n      }\n\n      if (pageSizeOptions != null) {\n        this._pageSizeOptions = pageSizeOptions;\n      }\n\n      if (hidePageSize != null) {\n        this._hidePageSize = hidePageSize;\n      }\n\n      if (showFirstLastButtons != null) {\n        this._showFirstLastButtons = showFirstLastButtons;\n      }\n\n      if (formFieldAppearance != null) {\n        this._formFieldAppearance = formFieldAppearance;\n      }\n    }\n  }\n\n  ngOnInit() {\n    this._initialized = true;\n    this._updateDisplayedPageSizeOptions();\n    this._markInitialized();\n  }\n\n  ngOnDestroy() {\n    this._intlChanges.unsubscribe();\n  }\n\n  /** Advances to the next page if it exists. */\n  nextPage(): void {\n    if (!this.hasNextPage()) { return; }\n\n    const previousPageIndex = this.pageIndex;\n    this.pageIndex++;\n    this._emitPageEvent(previousPageIndex);\n  }\n\n  /** Move back to the previous page if it exists. */\n  previousPage(): void {\n    if (!this.hasPreviousPage()) { return; }\n\n    const previousPageIndex = this.pageIndex;\n    this.pageIndex--;\n    this._emitPageEvent(previousPageIndex);\n  }\n\n  /** Move to the first page if not already there. */\n  firstPage(): void {\n    // hasPreviousPage being false implies at the start\n    if (!this.hasPreviousPage()) { return; }\n\n    const previousPageIndex = this.pageIndex;\n    this.pageIndex = 0;\n    this._emitPageEvent(previousPageIndex);\n  }\n\n  /** Move to the last page if not already there. */\n  lastPage(): void {\n    // hasNextPage being false implies at the end\n    if (!this.hasNextPage()) { return; }\n\n    const previousPageIndex = this.pageIndex;\n    this.pageIndex = this.getNumberOfPages() - 1;\n    this._emitPageEvent(previousPageIndex);\n  }\n\n  /** Whether there is a previous page. */\n  hasPreviousPage(): boolean {\n    return this.pageIndex >= 1 && this.pageSize != 0;\n  }\n\n  /** Whether there is a next page. */\n  hasNextPage(): boolean {\n    const maxPageIndex = this.getNumberOfPages() - 1;\n    return this.pageIndex < maxPageIndex && this.pageSize != 0;\n  }\n\n  /** Calculate the number of pages */\n  getNumberOfPages(): number {\n    if (!this.pageSize) {\n      return 0;\n    }\n\n    return Math.ceil(this.length / this.pageSize);\n  }\n\n\n  /**\n   * Changes the page size so that the first item displayed on the page will still be\n   * displayed using the new page size.\n   *\n   * For example, if the page size is 10 and on the second page (items indexed 10-19) then\n   * switching so that the page size is 5 will set the third page as the current page so\n   * that the 10th item will still be displayed.\n   */\n  _changePageSize(pageSize: number) {\n    // Current page needs to be updated to reflect the new page size. Navigate to the page\n    // containing the previous page's first item.\n    const startIndex = this.pageIndex * this.pageSize;\n    const previousPageIndex = this.pageIndex;\n\n    this.pageIndex = Math.floor(startIndex / pageSize) || 0;\n    this.pageSize = pageSize;\n    this._emitPageEvent(previousPageIndex);\n  }\n\n  /** Checks whether the buttons for going forwards should be disabled. */\n  _nextButtonsDisabled() {\n    return this.disabled || !this.hasNextPage();\n  }\n\n  /** Checks whether the buttons for going backwards should be disabled. */\n  _previousButtonsDisabled() {\n    return this.disabled || !this.hasPreviousPage();\n  }\n\n  /**\n   * Updates the list of page size options to display to the user. Includes making sure that\n   * the page size is an option and that the list is sorted.\n   */\n  private _updateDisplayedPageSizeOptions() {\n    if (!this._initialized) { return; }\n\n    // If no page size is provided, use the first page size option or the default page size.\n    if (!this.pageSize) {\n      this._pageSize = this.pageSizeOptions.length != 0 ?\n          this.pageSizeOptions[0] :\n          DEFAULT_PAGE_SIZE;\n    }\n\n    this._displayedPageSizeOptions = this.pageSizeOptions.slice();\n\n    if (this._displayedPageSizeOptions.indexOf(this.pageSize) === -1) {\n      this._displayedPageSizeOptions.push(this.pageSize);\n    }\n\n    // Sort the numbers using a number-specific sort function.\n    this._displayedPageSizeOptions.sort((a, b) => a - b);\n    this._changeDetectorRef.markForCheck();\n  }\n\n  /** Emits an event notifying that a change of the paginator's properties has been triggered. */\n  private _emitPageEvent(previousPageIndex: number) {\n    this.page.emit({\n      previousPageIndex,\n      pageIndex: this.pageIndex,\n      pageSize: this.pageSize,\n      length: this.length\n    });\n  }\n\n  static ngAcceptInputType_pageIndex: NumberInput;\n  static ngAcceptInputType_length: NumberInput;\n  static ngAcceptInputType_pageSize: NumberInput;\n  static ngAcceptInputType_hidePageSize: BooleanInput;\n  static ngAcceptInputType_showFirstLastButtons: BooleanInput;\n  static ngAcceptInputType_disabled: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {CommonModule} from '@angular/common';\nimport {NgModule} from '@angular/core';\nimport {MatButtonModule} from '@angular/material/button';\nimport {MatSelectModule} from '@angular/material/select';\nimport {MatTooltipModule} from '@angular/material/tooltip';\nimport {MatPaginator} from './paginator';\nimport {MAT_PAGINATOR_INTL_PROVIDER} from './paginator-intl';\n\n\n@NgModule({\n  imports: [\n    CommonModule,\n    MatButtonModule,\n    MatSelectModule,\n    MatTooltipModule,\n  ],\n  exports: [MatPaginator],\n  declarations: [MatPaginator],\n  providers: [MAT_PAGINATOR_INTL_PROVIDER],\n})\nexport class MatPaginatorModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './paginator-module';\nexport * from './paginator';\nexport * from './paginator-intl';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","import { Observable } from '../Observable';\nimport { Subscription } from '../Subscription';\nimport { iterator as Symbol_iterator } from '../symbol/iterator';\nexport function scheduleIterable(input, scheduler) {\n    if (!input) {\n        throw new Error('Iterable cannot be null');\n    }\n    return new Observable(subscriber => {\n        const sub = new Subscription();\n        let iterator;\n        sub.add(() => {\n            if (iterator && typeof iterator.return === 'function') {\n                iterator.return();\n            }\n        });\n        sub.add(scheduler.schedule(() => {\n            iterator = input[Symbol_iterator]();\n            sub.add(scheduler.schedule(function () {\n                if (subscriber.closed) {\n                    return;\n                }\n                let value;\n                let done;\n                try {\n                    const result = iterator.next();\n                    value = result.value;\n                    done = result.done;\n                }\n                catch (err) {\n                    subscriber.error(err);\n                    return;\n                }\n                if (done) {\n                    subscriber.complete();\n                }\n                else {\n                    subscriber.next(value);\n                    this.schedule();\n                }\n            }));\n        }));\n        return sub;\n    });\n}\n//# sourceMappingURL=scheduleIterable.js.map","import { Observable } from '../Observable';\nimport { subscribeToIterable } from '../util/subscribeToIterable';\nimport { scheduleIterable } from '../scheduled/scheduleIterable';\nexport function fromIterable(input, scheduler) {\n    if (!input) {\n        throw new Error('Iterable cannot be null');\n    }\n    if (!scheduler) {\n        return new Observable(subscribeToIterable(input));\n    }\n    else {\n        return scheduleIterable(input, scheduler);\n    }\n}\n//# sourceMappingURL=fromIterable.js.map","import { Subject } from '../Subject';\nimport { SimpleOuterSubscriber, innerSubscribe, SimpleInnerSubscriber } from '../innerSubscribe';\nexport function retryWhen(notifier) {\n    return (source) => source.lift(new RetryWhenOperator(notifier, source));\n}\nclass RetryWhenOperator {\n    constructor(notifier, source) {\n        this.notifier = notifier;\n        this.source = source;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new RetryWhenSubscriber(subscriber, this.notifier, this.source));\n    }\n}\nclass RetryWhenSubscriber extends SimpleOuterSubscriber {\n    constructor(destination, notifier, source) {\n        super(destination);\n        this.notifier = notifier;\n        this.source = source;\n    }\n    error(err) {\n        if (!this.isStopped) {\n            let errors = this.errors;\n            let retries = this.retries;\n            let retriesSubscription = this.retriesSubscription;\n            if (!retries) {\n                errors = new Subject();\n                try {\n                    const { notifier } = this;\n                    retries = notifier(errors);\n                }\n                catch (e) {\n                    return super.error(e);\n                }\n                retriesSubscription = innerSubscribe(retries, new SimpleInnerSubscriber(this));\n            }\n            else {\n                this.errors = undefined;\n                this.retriesSubscription = undefined;\n            }\n            this._unsubscribeAndRecycle();\n            this.errors = errors;\n            this.retries = retries;\n            this.retriesSubscription = retriesSubscription;\n            errors.next(err);\n        }\n    }\n    _unsubscribe() {\n        const { errors, retriesSubscription } = this;\n        if (errors) {\n            errors.unsubscribe();\n            this.errors = undefined;\n        }\n        if (retriesSubscription) {\n            retriesSubscription.unsubscribe();\n            this.retriesSubscription = undefined;\n        }\n        this.retries = undefined;\n    }\n    notifyNext() {\n        const { _unsubscribe } = this;\n        this._unsubscribe = null;\n        this._unsubscribeAndRecycle();\n        this._unsubscribe = _unsubscribe;\n        this.source.subscribe(this);\n    }\n}\n//# sourceMappingURL=retryWhen.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {coerceBooleanProperty, BooleanInput} from '@angular/cdk/coercion';\nimport {\n  AfterContentInit,\n  ChangeDetectionStrategy,\n  Component,\n  ContentChild,\n  ContentChildren,\n  Directive,\n  ElementRef,\n  Optional,\n  QueryList,\n  ViewEncapsulation,\n  OnChanges,\n  OnDestroy,\n  ChangeDetectorRef,\n  Input,\n  InjectionToken,\n  Inject,\n} from '@angular/core';\nimport {\n  CanDisable,\n  CanDisableCtor,\n  CanDisableRipple,\n  CanDisableRippleCtor,\n  MatLine,\n  setLines,\n  mixinDisableRipple,\n  mixinDisabled,\n} from '@angular/material/core';\nimport {Subject} from 'rxjs';\nimport {takeUntil} from 'rxjs/operators';\n\n// Boilerplate for applying mixins to MatList.\n/** @docs-private */\nclass MatListBase {}\nconst _MatListMixinBase: CanDisableRippleCtor & CanDisableCtor & typeof MatListBase =\n    mixinDisabled(mixinDisableRipple(MatListBase));\n\n// Boilerplate for applying mixins to MatListItem.\n/** @docs-private */\nclass MatListItemBase {}\nconst _MatListItemMixinBase: CanDisableRippleCtor & typeof MatListItemBase =\n    mixinDisableRipple(MatListItemBase);\n\n/**\n * Injection token that can be used to inject instances of `MatList`. It serves as\n * alternative token to the actual `MatList` class which could cause unnecessary\n * retention of the class and its component metadata.\n */\nexport const MAT_LIST = new InjectionToken<MatList>('MatList');\n\n/**\n * Injection token that can be used to inject instances of `MatNavList`. It serves as\n * alternative token to the actual `MatNavList` class which could cause unnecessary\n * retention of the class and its component metadata.\n */\nexport const MAT_NAV_LIST = new InjectionToken<MatNavList>('MatNavList');\n\n@Component({\n  selector: 'mat-nav-list',\n  exportAs: 'matNavList',\n  host: {\n    'role': 'navigation',\n    'class': 'mat-nav-list mat-list-base'\n  },\n  templateUrl: 'list.html',\n  styleUrls: ['list.css'],\n  inputs: ['disableRipple', 'disabled'],\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  providers: [{provide: MAT_NAV_LIST, useExisting: MatNavList}],\n})\nexport class MatNavList extends _MatListMixinBase implements CanDisable, CanDisableRipple,\n  OnChanges, OnDestroy {\n  /** Emits when the state of the list changes. */\n  _stateChanges = new Subject<void>();\n\n  ngOnChanges() {\n    this._stateChanges.next();\n  }\n\n  ngOnDestroy() {\n    this._stateChanges.complete();\n  }\n\n  static ngAcceptInputType_disableRipple: BooleanInput;\n  static ngAcceptInputType_disabled: BooleanInput;\n}\n\n@Component({\n  selector: 'mat-list, mat-action-list',\n  exportAs: 'matList',\n  templateUrl: 'list.html',\n  host: {\n    'class': 'mat-list mat-list-base'\n  },\n  styleUrls: ['list.css'],\n  inputs: ['disableRipple', 'disabled'],\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  providers: [{provide: MAT_LIST, useExisting: MatList}],\n})\nexport class MatList extends _MatListMixinBase implements CanDisable, CanDisableRipple, OnChanges,\n  OnDestroy {\n  /** Emits when the state of the list changes. */\n  _stateChanges = new Subject<void>();\n\n  constructor(private _elementRef: ElementRef<HTMLElement>) {\n    super();\n\n    if (this._getListType() === 'action-list') {\n      _elementRef.nativeElement.classList.add('mat-action-list');\n    }\n  }\n\n  _getListType(): 'list' | 'action-list' | null {\n    const nodeName = this._elementRef.nativeElement.nodeName.toLowerCase();\n\n    if (nodeName === 'mat-list') {\n      return 'list';\n    }\n\n    if (nodeName === 'mat-action-list') {\n      return 'action-list';\n    }\n\n    return null;\n  }\n\n  ngOnChanges() {\n    this._stateChanges.next();\n  }\n\n  ngOnDestroy() {\n    this._stateChanges.complete();\n  }\n\n  static ngAcceptInputType_disableRipple: BooleanInput;\n  static ngAcceptInputType_disabled: BooleanInput;\n}\n\n/**\n * Directive whose purpose is to add the mat- CSS styling to this selector.\n * @docs-private\n */\n@Directive({\n  selector: '[mat-list-avatar], [matListAvatar]',\n  host: {'class': 'mat-list-avatar'}\n})\nexport class MatListAvatarCssMatStyler {}\n\n/**\n * Directive whose purpose is to add the mat- CSS styling to this selector.\n * @docs-private\n */\n@Directive({\n  selector: '[mat-list-icon], [matListIcon]',\n  host: {'class': 'mat-list-icon'}\n})\nexport class MatListIconCssMatStyler {}\n\n/**\n * Directive whose purpose is to add the mat- CSS styling to this selector.\n * @docs-private\n */\n@Directive({\n  selector: '[mat-subheader], [matSubheader]',\n  host: {'class': 'mat-subheader'}\n})\nexport class MatListSubheaderCssMatStyler {}\n\n/** An item within a Material Design list. */\n@Component({\n  selector: 'mat-list-item, a[mat-list-item], button[mat-list-item]',\n  exportAs: 'matListItem',\n  host: {\n    'class': 'mat-list-item mat-focus-indicator',\n    '[class.mat-list-item-disabled]': 'disabled',\n    // @breaking-change 8.0.0 Remove `mat-list-item-avatar` in favor of `mat-list-item-with-avatar`.\n    '[class.mat-list-item-avatar]': '_avatar || _icon',\n    '[class.mat-list-item-with-avatar]': '_avatar || _icon',\n  },\n  inputs: ['disableRipple'],\n  templateUrl: 'list-item.html',\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n})\nexport class MatListItem extends _MatListItemMixinBase implements AfterContentInit,\n    CanDisableRipple, OnDestroy {\n  private _isInteractiveList: boolean = false;\n  private _list?: MatNavList | MatList;\n  private _destroyed = new Subject<void>();\n\n  @ContentChildren(MatLine, {descendants: true}) _lines: QueryList<MatLine>;\n  @ContentChild(MatListAvatarCssMatStyler) _avatar: MatListAvatarCssMatStyler;\n  @ContentChild(MatListIconCssMatStyler) _icon: MatListIconCssMatStyler;\n\n  constructor(private _element: ElementRef<HTMLElement>,\n              _changeDetectorRef: ChangeDetectorRef,\n              @Optional() @Inject(MAT_NAV_LIST) navList?: MatNavList,\n              @Optional() @Inject(MAT_LIST) list?: MatList) {\n    super();\n    this._isInteractiveList = !!(navList || (list && list._getListType() === 'action-list'));\n    this._list = navList || list;\n\n    // If no type attribute is specified for <button>, set it to \"button\".\n    // If a type attribute is already specified, do nothing.\n    const element = this._getHostElement();\n\n    if (element.nodeName.toLowerCase() === 'button' && !element.hasAttribute('type')) {\n      element.setAttribute('type', 'button');\n    }\n\n    if (this._list) {\n      // React to changes in the state of the parent list since\n      // some of the item's properties depend on it (e.g. `disableRipple`).\n      this._list._stateChanges.pipe(takeUntil(this._destroyed)).subscribe(() => {\n        _changeDetectorRef.markForCheck();\n      });\n    }\n  }\n\n  /** Whether the option is disabled. */\n  @Input()\n  get disabled() { return this._disabled || !!(this._list && this._list.disabled); }\n  set disabled(value: boolean) {\n    this._disabled = coerceBooleanProperty(value);\n  }\n  private _disabled = false;\n\n  ngAfterContentInit() {\n    setLines(this._lines, this._element);\n  }\n\n  ngOnDestroy() {\n    this._destroyed.next();\n    this._destroyed.complete();\n  }\n\n  /** Whether this list item should show a ripple effect when clicked. */\n  _isRippleDisabled() {\n    return !this._isInteractiveList || this.disableRipple ||\n           !!(this._list && this._list.disableRipple);\n  }\n\n  /** Retrieves the DOM element of the component host. */\n  _getHostElement(): HTMLElement {\n    return this._element.nativeElement;\n  }\n\n  static ngAcceptInputType_disableRipple: BooleanInput;\n  static ngAcceptInputType_disabled: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {FocusableOption, FocusKeyManager, FocusMonitor} from '@angular/cdk/a11y';\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {SelectionModel} from '@angular/cdk/collections';\nimport {\n  A,\n  DOWN_ARROW,\n  ENTER,\n  hasModifierKey,\n  SPACE,\n  UP_ARROW,\n} from '@angular/cdk/keycodes';\nimport {\n  AfterContentInit,\n  Attribute,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ContentChild,\n  ContentChildren,\n  ElementRef,\n  EventEmitter,\n  forwardRef,\n  Inject,\n  Input,\n  OnChanges,\n  OnDestroy,\n  OnInit,\n  Output,\n  QueryList,\n  SimpleChanges,\n  ViewChild,\n  ViewEncapsulation,\n} from '@angular/core';\nimport {ControlValueAccessor, NG_VALUE_ACCESSOR} from '@angular/forms';\nimport {\n  CanDisableRipple,\n  CanDisableRippleCtor,\n  MatLine,\n  mixinDisableRipple,\n  setLines,\n  ThemePalette,\n} from '@angular/material/core';\nimport {Subject} from 'rxjs';\nimport {startWith, takeUntil} from 'rxjs/operators';\nimport {MatListAvatarCssMatStyler, MatListIconCssMatStyler} from './list';\n\nclass MatSelectionListBase {}\nconst _MatSelectionListMixinBase: CanDisableRippleCtor & typeof MatSelectionListBase =\n    mixinDisableRipple(MatSelectionListBase);\n\nclass MatListOptionBase {}\nconst _MatListOptionMixinBase: CanDisableRippleCtor & typeof MatListOptionBase =\n    mixinDisableRipple(MatListOptionBase);\n\n/** @docs-private */\nexport const MAT_SELECTION_LIST_VALUE_ACCESSOR: any = {\n  provide: NG_VALUE_ACCESSOR,\n  useExisting: forwardRef(() => MatSelectionList),\n  multi: true\n};\n\n/** Change event that is being fired whenever the selected state of an option changes. */\nexport class MatSelectionListChange {\n  constructor(\n    /** Reference to the selection list that emitted the event. */\n    public source: MatSelectionList,\n    /** Reference to the option that has been changed. */\n    public option: MatListOption) {}\n}\n\n/**\n * Component for list-options of selection-list. Each list-option can automatically\n * generate a checkbox and can put current item into the selectionModel of selection-list\n * if the current item is selected.\n */\n@Component({\n  selector: 'mat-list-option',\n  exportAs: 'matListOption',\n  inputs: ['disableRipple'],\n  host: {\n    'role': 'option',\n    'class': 'mat-list-item mat-list-option mat-focus-indicator',\n    '(focus)': '_handleFocus()',\n    '(blur)': '_handleBlur()',\n    '(click)': '_handleClick()',\n    '[class.mat-list-item-disabled]': 'disabled',\n    '[class.mat-list-item-with-avatar]': '_avatar || _icon',\n    // Manually set the \"primary\" or \"warn\" class if the color has been explicitly\n    // set to \"primary\" or \"warn\". The pseudo checkbox picks up these classes for\n    // its theme.\n    '[class.mat-primary]': 'color === \"primary\"',\n    // Even though accent is the default, we need to set this class anyway, because the  list might\n    // be placed inside a parent that has one of the other colors with a higher specificity.\n    '[class.mat-accent]': 'color !== \"primary\" && color !== \"warn\"',\n    '[class.mat-warn]': 'color === \"warn\"',\n    '[class.mat-list-single-selected-option]': 'selected && !selectionList.multiple',\n    '[attr.aria-selected]': 'selected',\n    '[attr.aria-disabled]': 'disabled',\n    '[attr.tabindex]': '-1',\n  },\n  templateUrl: 'list-option.html',\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n})\nexport class MatListOption extends _MatListOptionMixinBase implements AfterContentInit, OnDestroy,\n                                                                      OnInit, FocusableOption,\n                                                                      CanDisableRipple {\n  private _selected = false;\n  private _disabled = false;\n  private _hasFocus = false;\n\n  @ContentChild(MatListAvatarCssMatStyler) _avatar: MatListAvatarCssMatStyler;\n  @ContentChild(MatListIconCssMatStyler) _icon: MatListIconCssMatStyler;\n  @ContentChildren(MatLine, {descendants: true}) _lines: QueryList<MatLine>;\n\n  /** DOM element containing the item's text. */\n  @ViewChild('text') _text: ElementRef;\n\n  /** Whether the label should appear before or after the checkbox. Defaults to 'after' */\n  @Input() checkboxPosition: 'before' | 'after' = 'after';\n\n  /** Theme color of the list option. This sets the color of the checkbox. */\n  @Input()\n  get color(): ThemePalette { return this._color || this.selectionList.color; }\n  set color(newValue: ThemePalette) { this._color = newValue; }\n  private _color: ThemePalette;\n\n  /**\n   * This is set to true after the first OnChanges cycle so we don't clear the value of `selected`\n   * in the first cycle.\n   */\n  private _inputsInitialized = false;\n  /** Value of the option */\n  @Input()\n  get value(): any { return this._value; }\n  set value(newValue: any) {\n    if (\n      this.selected &&\n      !this.selectionList.compareWith(newValue, this.value) &&\n      this._inputsInitialized\n    ) {\n      this.selected = false;\n    }\n\n    this._value = newValue;\n  }\n  private _value: any;\n\n  /** Whether the option is disabled. */\n  @Input()\n  get disabled() { return this._disabled || (this.selectionList && this.selectionList.disabled); }\n  set disabled(value: any) {\n    const newValue = coerceBooleanProperty(value);\n\n    if (newValue !== this._disabled) {\n      this._disabled = newValue;\n      this._changeDetector.markForCheck();\n    }\n  }\n\n  /** Whether the option is selected. */\n  @Input()\n  get selected(): boolean { return this.selectionList.selectedOptions.isSelected(this); }\n  set selected(value: boolean) {\n    const isSelected = coerceBooleanProperty(value);\n\n    if (isSelected !== this._selected) {\n      this._setSelected(isSelected);\n      this.selectionList._reportValueChange();\n    }\n  }\n\n  constructor(private _element: ElementRef<HTMLElement>,\n              private _changeDetector: ChangeDetectorRef,\n              /** @docs-private */\n              @Inject(forwardRef(() => MatSelectionList)) public selectionList: MatSelectionList) {\n    super();\n  }\n\n  ngOnInit() {\n    const list = this.selectionList;\n\n    if (list._value && list._value.some(value => list.compareWith(value, this._value))) {\n      this._setSelected(true);\n    }\n\n    const wasSelected = this._selected;\n\n    // List options that are selected at initialization can't be reported properly to the form\n    // control. This is because it takes some time until the selection-list knows about all\n    // available options. Also it can happen that the ControlValueAccessor has an initial value\n    // that should be used instead. Deferring the value change report to the next tick ensures\n    // that the form control value is not being overwritten.\n    Promise.resolve().then(() => {\n      if (this._selected || wasSelected) {\n        this.selected = true;\n        this._changeDetector.markForCheck();\n      }\n    });\n    this._inputsInitialized = true;\n  }\n\n  ngAfterContentInit() {\n    setLines(this._lines, this._element);\n  }\n\n  ngOnDestroy(): void {\n    if (this.selected) {\n      // We have to delay this until the next tick in order\n      // to avoid changed after checked errors.\n      Promise.resolve().then(() => {\n        this.selected = false;\n      });\n    }\n\n    const hadFocus = this._hasFocus;\n    const newActiveItem = this.selectionList._removeOptionFromList(this);\n\n    // Only move focus if this option was focused at the time it was destroyed.\n    if (hadFocus && newActiveItem) {\n      newActiveItem.focus();\n    }\n  }\n\n  /** Toggles the selection state of the option. */\n  toggle(): void {\n    this.selected = !this.selected;\n  }\n\n  /** Allows for programmatic focusing of the option. */\n  focus(): void {\n    this._element.nativeElement.focus();\n  }\n\n  /**\n   * Returns the list item's text label. Implemented as a part of the FocusKeyManager.\n   * @docs-private\n   */\n  getLabel() {\n    return this._text ? (this._text.nativeElement.textContent || '') : '';\n  }\n\n  /** Whether this list item should show a ripple effect when clicked. */\n  _isRippleDisabled() {\n    return this.disabled || this.disableRipple || this.selectionList.disableRipple;\n  }\n\n  _handleClick() {\n    if (!this.disabled && (this.selectionList.multiple || !this.selected)) {\n      this.toggle();\n\n      // Emit a change event if the selected state of the option changed through user interaction.\n      this.selectionList._emitChangeEvent(this);\n    }\n  }\n\n  _handleFocus() {\n    this.selectionList._setFocusedOption(this);\n    this._hasFocus = true;\n  }\n\n  _handleBlur() {\n    this.selectionList._onTouched();\n    this._hasFocus = false;\n  }\n\n  /** Retrieves the DOM element of the component host. */\n  _getHostElement(): HTMLElement {\n    return this._element.nativeElement;\n  }\n\n  /** Sets the selected state of the option. Returns whether the value has changed. */\n  _setSelected(selected: boolean): boolean {\n    if (selected === this._selected) {\n      return false;\n    }\n\n    this._selected = selected;\n\n    if (selected) {\n      this.selectionList.selectedOptions.select(this);\n    } else {\n      this.selectionList.selectedOptions.deselect(this);\n    }\n\n    this._changeDetector.markForCheck();\n    return true;\n  }\n\n  /**\n   * Notifies Angular that the option needs to be checked in the next change detection run. Mainly\n   * used to trigger an update of the list option if the disabled state of the selection list\n   * changed.\n   */\n  _markForCheck() {\n    this._changeDetector.markForCheck();\n  }\n\n  static ngAcceptInputType_disabled: BooleanInput;\n  static ngAcceptInputType_selected: BooleanInput;\n  static ngAcceptInputType_disableRipple: BooleanInput;\n}\n\n\n/**\n * Material Design list component where each item is a selectable option. Behaves as a listbox.\n */\n@Component({\n  selector: 'mat-selection-list',\n  exportAs: 'matSelectionList',\n  inputs: ['disableRipple'],\n  host: {\n    'role': 'listbox',\n    'class': 'mat-selection-list mat-list-base',\n    '(keydown)': '_keydown($event)',\n    '[attr.aria-multiselectable]': 'multiple',\n    '[attr.aria-disabled]': 'disabled.toString()',\n    '[attr.tabindex]': '_tabIndex',\n  },\n  template: '<ng-content></ng-content>',\n  styleUrls: ['list.css'],\n  encapsulation: ViewEncapsulation.None,\n  providers: [MAT_SELECTION_LIST_VALUE_ACCESSOR],\n  changeDetection: ChangeDetectionStrategy.OnPush\n})\nexport class MatSelectionList extends _MatSelectionListMixinBase implements CanDisableRipple,\n  AfterContentInit, ControlValueAccessor, OnDestroy, OnChanges {\n  private _multiple = true;\n  private _contentInitialized = false;\n\n  /** The FocusKeyManager which handles focus. */\n  _keyManager: FocusKeyManager<MatListOption>;\n\n  /** The option components contained within this selection-list. */\n  @ContentChildren(MatListOption, {descendants: true}) options: QueryList<MatListOption>;\n\n  /** Emits a change event whenever the selected state of an option changes. */\n  @Output() readonly selectionChange: EventEmitter<MatSelectionListChange> =\n      new EventEmitter<MatSelectionListChange>();\n\n  /**\n   * Tabindex of the selection list.\n   * @breaking-change 11.0.0 Remove `tabIndex` input.\n   */\n  @Input() tabIndex: number = 0;\n\n  /** Theme color of the selection list. This sets the checkbox color for all list options. */\n  @Input() color: ThemePalette = 'accent';\n\n  /**\n   * Function used for comparing an option against the selected value when determining which\n   * options should appear as selected. The first argument is the value of an options. The second\n   * one is a value from the selected value. A boolean must be returned.\n   */\n  @Input() compareWith: (o1: any, o2: any) => boolean = (a1, a2) => a1 === a2;\n\n  /** Whether the selection list is disabled. */\n  @Input()\n  get disabled(): boolean { return this._disabled; }\n  set disabled(value: boolean) {\n    this._disabled = coerceBooleanProperty(value);\n\n    // The `MatSelectionList` and `MatListOption` are using the `OnPush` change detection\n    // strategy. Therefore the options will not check for any changes if the `MatSelectionList`\n    // changed its state. Since we know that a change to `disabled` property of the list affects\n    // the state of the options, we manually mark each option for check.\n    this._markOptionsForCheck();\n  }\n  private _disabled: boolean = false;\n\n  /** Whether selection is limited to one or multiple items (default multiple). */\n  @Input()\n  get multiple(): boolean { return this._multiple; }\n  set multiple(value: boolean) {\n    const newValue = coerceBooleanProperty(value);\n\n    if (newValue !== this._multiple) {\n      if (this._contentInitialized && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n        throw new Error(\n            'Cannot change `multiple` mode of mat-selection-list after initialization.');\n      }\n\n      this._multiple = newValue;\n      this.selectedOptions = new SelectionModel(this._multiple, this.selectedOptions.selected);\n    }\n  }\n\n  /** The currently selected options. */\n  selectedOptions = new SelectionModel<MatListOption>(this._multiple);\n\n  /** The tabindex of the selection list. */\n  _tabIndex = -1;\n\n  /** View to model callback that should be called whenever the selected options change. */\n  private _onChange: (value: any) => void = (_: any) => {};\n\n  /** Keeps track of the currently-selected value. */\n  _value: string[]|null;\n\n  /** Emits when the list has been destroyed. */\n  private _destroyed = new Subject<void>();\n\n  /** View to model callback that should be called if the list or its options lost focus. */\n  _onTouched: () => void = () => {};\n\n  /** Whether the list has been destroyed. */\n  private _isDestroyed: boolean;\n\n  constructor(private _element: ElementRef<HTMLElement>,\n    // @breaking-change 11.0.0 Remove `tabIndex` parameter.\n    @Attribute('tabindex') tabIndex: string,\n    private _changeDetector: ChangeDetectorRef,\n    // @breaking-change 11.0.0 `_focusMonitor` parameter to become required.\n    private _focusMonitor?: FocusMonitor) {\n    super();\n  }\n\n  ngAfterContentInit(): void {\n    this._contentInitialized = true;\n\n    this._keyManager = new FocusKeyManager<MatListOption>(this.options)\n      .withWrap()\n      .withTypeAhead()\n      .withHomeAndEnd()\n      // Allow disabled items to be focusable. For accessibility reasons, there must be a way for\n      // screenreader users, that allows reading the different options of the list.\n      .skipPredicate(() => false)\n      .withAllowedModifierKeys(['shiftKey']);\n\n    if (this._value) {\n      this._setOptionsFromValues(this._value);\n    }\n\n    // If the user attempts to tab out of the selection list, allow focus to escape.\n    this._keyManager.tabOut.pipe(takeUntil(this._destroyed)).subscribe(() => {\n      this._allowFocusEscape();\n    });\n\n    // When the number of options change, update the tabindex of the selection list.\n    this.options.changes.pipe(startWith(null), takeUntil(this._destroyed)).subscribe(() => {\n      this._updateTabIndex();\n    });\n\n    // Sync external changes to the model back to the options.\n    this.selectedOptions.changed.pipe(takeUntil(this._destroyed)).subscribe(event => {\n      if (event.added) {\n        for (let item of event.added) {\n          item.selected = true;\n        }\n      }\n\n      if (event.removed) {\n        for (let item of event.removed) {\n          item.selected = false;\n        }\n      }\n    });\n\n    // @breaking-change 11.0.0 Remove null assertion once _focusMonitor is required.\n    this._focusMonitor?.monitor(this._element)\n      .pipe(takeUntil(this._destroyed))\n      .subscribe(origin => {\n        if (origin === 'keyboard' || origin === 'program') {\n          const activeIndex = this._keyManager.activeItemIndex;\n\n          if (!activeIndex || activeIndex === -1) {\n            // If there is no active index, set focus to the first option.\n            this._keyManager.setFirstItemActive();\n          } else {\n            // Otherwise, set focus to the active option.\n            this._keyManager.setActiveItem(activeIndex);\n          }\n        }\n      });\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    const disableRippleChanges = changes['disableRipple'];\n    const colorChanges = changes['color'];\n\n    if ((disableRippleChanges && !disableRippleChanges.firstChange) ||\n        (colorChanges && !colorChanges.firstChange)) {\n      this._markOptionsForCheck();\n    }\n  }\n\n  ngOnDestroy() {\n    // @breaking-change 11.0.0 Remove null assertion once _focusMonitor is required.\n    this._focusMonitor?.stopMonitoring(this._element);\n    this._destroyed.next();\n    this._destroyed.complete();\n    this._isDestroyed = true;\n  }\n\n  /** Focuses the selection list. */\n  focus(options?: FocusOptions) {\n    this._element.nativeElement.focus(options);\n  }\n\n  /** Selects all of the options. */\n  selectAll() {\n    this._setAllOptionsSelected(true);\n  }\n\n  /** Deselects all of the options. */\n  deselectAll() {\n    this._setAllOptionsSelected(false);\n  }\n\n  /** Sets the focused option of the selection-list. */\n  _setFocusedOption(option: MatListOption) {\n    this._keyManager.updateActiveItem(option);\n  }\n\n  /**\n   * Removes an option from the selection list and updates the active item.\n   * @returns Currently-active item.\n   */\n  _removeOptionFromList(option: MatListOption): MatListOption | null {\n    const optionIndex = this._getOptionIndex(option);\n\n    if (optionIndex > -1 && this._keyManager.activeItemIndex === optionIndex) {\n      // Check whether the option is the last item\n      if (optionIndex > 0) {\n        this._keyManager.updateActiveItem(optionIndex - 1);\n      } else if (optionIndex === 0 && this.options.length > 1) {\n        this._keyManager.updateActiveItem(Math.min(optionIndex + 1, this.options.length - 1));\n      }\n    }\n\n    return this._keyManager.activeItem;\n  }\n\n  /** Passes relevant key presses to our key manager. */\n  _keydown(event: KeyboardEvent) {\n    const keyCode = event.keyCode;\n    const manager = this._keyManager;\n    const previousFocusIndex = manager.activeItemIndex;\n    const hasModifier = hasModifierKey(event);\n\n    switch (keyCode) {\n      case SPACE:\n      case ENTER:\n        if (!hasModifier && !manager.isTyping()) {\n          this._toggleFocusedOption();\n          // Always prevent space from scrolling the page since the list has focus\n          event.preventDefault();\n        }\n        break;\n      default:\n        // The \"A\" key gets special treatment, because it's used for the \"select all\" functionality.\n        if (keyCode === A && this.multiple && hasModifierKey(event, 'ctrlKey') &&\n            !manager.isTyping()) {\n          const shouldSelect = this.options.some(option => !option.disabled && !option.selected);\n          this._setAllOptionsSelected(shouldSelect, true);\n          event.preventDefault();\n        } else {\n          manager.onKeydown(event);\n        }\n    }\n\n    if (this.multiple && (keyCode === UP_ARROW || keyCode === DOWN_ARROW) && event.shiftKey &&\n        manager.activeItemIndex !== previousFocusIndex) {\n      this._toggleFocusedOption();\n    }\n  }\n\n  /** Reports a value change to the ControlValueAccessor */\n  _reportValueChange() {\n    // Stop reporting value changes after the list has been destroyed. This avoids\n    // cases where the list might wrongly reset its value once it is removed, but\n    // the form control is still live.\n    if (this.options && !this._isDestroyed) {\n      const value = this._getSelectedOptionValues();\n      this._onChange(value);\n      this._value = value;\n    }\n  }\n\n  /** Emits a change event if the selected state of an option changed. */\n  _emitChangeEvent(option: MatListOption) {\n    this.selectionChange.emit(new MatSelectionListChange(this, option));\n  }\n\n  /** Implemented as part of ControlValueAccessor. */\n  writeValue(values: string[]): void {\n    this._value = values;\n\n    if (this.options) {\n      this._setOptionsFromValues(values || []);\n    }\n  }\n\n  /** Implemented as a part of ControlValueAccessor. */\n  setDisabledState(isDisabled: boolean): void {\n    this.disabled = isDisabled;\n  }\n\n  /** Implemented as part of ControlValueAccessor. */\n  registerOnChange(fn: (value: any) => void): void {\n    this._onChange = fn;\n  }\n\n  /** Implemented as part of ControlValueAccessor. */\n  registerOnTouched(fn: () => void): void {\n    this._onTouched = fn;\n  }\n\n  /** Sets the selected options based on the specified values. */\n  private _setOptionsFromValues(values: string[]) {\n    this.options.forEach(option => option._setSelected(false));\n\n    values.forEach(value => {\n      const correspondingOption = this.options.find(option => {\n        // Skip options that are already in the model. This allows us to handle cases\n        // where the same primitive value is selected multiple times.\n        return option.selected ? false : this.compareWith(option.value, value);\n      });\n\n      if (correspondingOption) {\n        correspondingOption._setSelected(true);\n      }\n    });\n  }\n\n  /** Returns the values of the selected options. */\n  private _getSelectedOptionValues(): string[] {\n    return this.options.filter(option => option.selected).map(option => option.value);\n  }\n\n  /** Toggles the state of the currently focused option if enabled. */\n  private _toggleFocusedOption(): void {\n    let focusedIndex = this._keyManager.activeItemIndex;\n\n    if (focusedIndex != null && this._isValidIndex(focusedIndex)) {\n      let focusedOption: MatListOption = this.options.toArray()[focusedIndex];\n\n      if (focusedOption && !focusedOption.disabled && (this._multiple || !focusedOption.selected)) {\n        focusedOption.toggle();\n\n        // Emit a change event because the focused option changed its state through user\n        // interaction.\n        this._emitChangeEvent(focusedOption);\n      }\n    }\n  }\n\n  /**\n   * Sets the selected state on all of the options\n   * and emits an event if anything changed.\n   */\n  private _setAllOptionsSelected(isSelected: boolean, skipDisabled?: boolean) {\n    // Keep track of whether anything changed, because we only want to\n    // emit the changed event when something actually changed.\n    let hasChanged = false;\n\n    this.options.forEach(option => {\n      if ((!skipDisabled || !option.disabled) && option._setSelected(isSelected)) {\n        hasChanged = true;\n      }\n    });\n\n    if (hasChanged) {\n      this._reportValueChange();\n    }\n  }\n\n  /**\n   * Utility to ensure all indexes are valid.\n   * @param index The index to be checked.\n   * @returns True if the index is valid for our list of options.\n   */\n  private _isValidIndex(index: number): boolean {\n    return index >= 0 && index < this.options.length;\n  }\n\n  /** Returns the index of the specified list option. */\n  private _getOptionIndex(option: MatListOption): number {\n    return this.options.toArray().indexOf(option);\n  }\n\n  /** Marks all the options to be checked in the next change detection run. */\n  private _markOptionsForCheck() {\n    if (this.options) {\n      this.options.forEach(option => option._markForCheck());\n    }\n  }\n\n  /**\n   * Removes the tabindex from the selection list and resets it back afterwards, allowing the user\n   * to tab out of it. This prevents the list from capturing focus and redirecting it back within\n   * the list, creating a focus trap if it user tries to tab away.\n   */\n  private _allowFocusEscape() {\n    this._tabIndex = -1;\n\n    setTimeout(() => {\n      this._tabIndex = 0;\n      this._changeDetector.markForCheck();\n    });\n  }\n\n  /** Updates the tabindex based upon if the selection list is empty. */\n  private _updateTabIndex(): void {\n    this._tabIndex = (this.options.length === 0) ? -1 : 0;\n  }\n\n  static ngAcceptInputType_disabled: BooleanInput;\n  static ngAcceptInputType_disableRipple: BooleanInput;\n  static ngAcceptInputType_multiple: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {CommonModule} from '@angular/common';\nimport {NgModule} from '@angular/core';\nimport {\n  MatCommonModule,\n  MatLineModule,\n  MatPseudoCheckboxModule,\n  MatRippleModule,\n} from '@angular/material/core';\nimport {\n  MatList,\n  MatNavList,\n  MatListAvatarCssMatStyler,\n  MatListIconCssMatStyler,\n  MatListItem,\n  MatListSubheaderCssMatStyler,\n} from './list';\nimport {MatListOption, MatSelectionList} from './selection-list';\nimport {MatDividerModule} from '@angular/material/divider';\n\n\n@NgModule({\n  imports: [MatLineModule, MatRippleModule, MatCommonModule, MatPseudoCheckboxModule, CommonModule],\n  exports: [\n    MatList,\n    MatNavList,\n    MatListItem,\n    MatListAvatarCssMatStyler,\n    MatLineModule,\n    MatCommonModule,\n    MatListIconCssMatStyler,\n    MatListSubheaderCssMatStyler,\n    MatPseudoCheckboxModule,\n    MatSelectionList,\n    MatListOption,\n    MatDividerModule\n  ],\n  declarations: [\n    MatList,\n    MatNavList,\n    MatListItem,\n    MatListAvatarCssMatStyler,\n    MatListIconCssMatStyler,\n    MatListSubheaderCssMatStyler,\n    MatSelectionList,\n    MatListOption\n  ],\n})\nexport class MatListModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './list-module';\nexport * from './list';\nexport * from './selection-list';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Maps each source value (an object) to its specified nested property.\n *\n * <span class=\"informal\">Like {@link map}, but meant only for picking one of\n * the nested properties of every emitted object.</span>\n *\n * <img src=\"./img/pluck.png\" width=\"100%\">\n *\n * Given a list of strings describing a path to an object property, retrieves\n * the value of a specified nested property from all values in the source\n * Observable. If a property can't be resolved, it will return `undefined` for\n * that value.\n *\n * @example <caption>Map every click to the tagName of the clicked target element</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var tagNames = clicks.pluck('target', 'tagName');\n * tagNames.subscribe(x => console.log(x));\n *\n * @see {@link map}\n *\n * @param {...string} properties The nested properties to pluck from each source\n * value (an object).\n * @return {Observable} A new Observable of property values from the source values.\n * @method pluck\n * @owner Observable\n */\nfunction pluck() {\n    var properties = [];\n    for (var _i = 0; _i < arguments.length; _i++) {\n        properties[_i] = arguments[_i];\n    }\n    return operators_1.pluck.apply(void 0, properties)(this);\n}\nexports.pluck = pluck;\n//# sourceMappingURL=pluck.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/* tslint:enable:max-line-length */\n/**\n * Returns an Observable that mirrors the first source Observable to emit an item\n * from the combination of this Observable and supplied Observables.\n * @param {...Observables} ...observables Sources used to race for which Observable emits first.\n * @return {Observable} An Observable that mirrors the output of the first Observable to emit an item.\n * @method race\n * @owner Observable\n */\nfunction race() {\n    var observables = [];\n    for (var _i = 0; _i < arguments.length; _i++) {\n        observables[_i] = arguments[_i];\n    }\n    return operators_1.race.apply(void 0, observables)(this);\n}\nexports.race = race;\n//# sourceMappingURL=race.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {Directive, InjectionToken, Input, OnChanges, OnDestroy, SimpleChanges} from '@angular/core';\nimport {Subject} from 'rxjs';\n\n/** Used to generate unique ID for each accordion. */\nlet nextId = 0;\n\n/**\n * Injection token that can be used to reference instances of `CdkAccordion`. It serves\n * as alternative token to the actual `CdkAccordion` class which could cause unnecessary\n * retention of the class and its directive metadata.\n */\nexport const CDK_ACCORDION = new InjectionToken<CdkAccordion>('CdkAccordion');\n\n/**\n * Directive whose purpose is to manage the expanded state of CdkAccordionItem children.\n */\n@Directive({\n  selector: 'cdk-accordion, [cdkAccordion]',\n  exportAs: 'cdkAccordion',\n  providers: [{provide: CDK_ACCORDION, useExisting: CdkAccordion}],\n})\nexport class CdkAccordion implements OnDestroy, OnChanges {\n  /** Emits when the state of the accordion changes */\n  readonly _stateChanges = new Subject<SimpleChanges>();\n\n  /** Stream that emits true/false when openAll/closeAll is triggered. */\n  readonly _openCloseAllActions: Subject<boolean> = new Subject<boolean>();\n\n  /** A readonly id value to use for unique selection coordination. */\n  readonly id = `cdk-accordion-${nextId++}`;\n\n  /** Whether the accordion should allow multiple expanded accordion items simultaneously. */\n  @Input()\n  get multi(): boolean { return this._multi; }\n  set multi(multi: boolean) { this._multi = coerceBooleanProperty(multi); }\n  private _multi: boolean = false;\n\n  /** Opens all enabled accordion items in an accordion where multi is enabled. */\n  openAll(): void {\n    this._openCloseAll(true);\n  }\n\n  /** Closes all enabled accordion items in an accordion where multi is enabled. */\n  closeAll(): void {\n    this._openCloseAll(false);\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    this._stateChanges.next(changes);\n  }\n\n  ngOnDestroy() {\n    this._stateChanges.complete();\n  }\n\n  private _openCloseAll(expanded: boolean): void {\n    if (this.multi) {\n      this._openCloseAllActions.next(expanded);\n    }\n  }\n\n  static ngAcceptInputType_multi: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  Output,\n  Directive,\n  EventEmitter,\n  Input,\n  OnDestroy,\n  Optional,\n  ChangeDetectorRef,\n  SkipSelf,\n  Inject,\n} from '@angular/core';\nimport {UniqueSelectionDispatcher} from '@angular/cdk/collections';\nimport {CDK_ACCORDION, CdkAccordion} from './accordion';\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {Subscription} from 'rxjs';\n\n/** Used to generate unique ID for each accordion item. */\nlet nextId = 0;\n\n/**\n * An basic directive expected to be extended and decorated as a component.  Sets up all\n * events and attributes needed to be managed by a CdkAccordion parent.\n */\n@Directive({\n  selector: 'cdk-accordion-item, [cdkAccordionItem]',\n  exportAs: 'cdkAccordionItem',\n  providers: [\n    // Provide `CDK_ACCORDION` as undefined to prevent nested accordion items from\n    // registering to the same accordion.\n    {provide: CDK_ACCORDION, useValue: undefined},\n  ],\n})\nexport class CdkAccordionItem implements OnDestroy {\n  /** Subscription to openAll/closeAll events. */\n  private _openCloseAllSubscription = Subscription.EMPTY;\n  /** Event emitted every time the AccordionItem is closed. */\n  @Output() closed: EventEmitter<void> = new EventEmitter<void>();\n  /** Event emitted every time the AccordionItem is opened. */\n  @Output() opened: EventEmitter<void> = new EventEmitter<void>();\n  /** Event emitted when the AccordionItem is destroyed. */\n  @Output() destroyed: EventEmitter<void> = new EventEmitter<void>();\n\n  /**\n   * Emits whenever the expanded state of the accordion changes.\n   * Primarily used to facilitate two-way binding.\n   * @docs-private\n   */\n  @Output() expandedChange: EventEmitter<boolean> = new EventEmitter<boolean>();\n\n  /** The unique AccordionItem id. */\n  readonly id: string = `cdk-accordion-child-${nextId++}`;\n\n  /** Whether the AccordionItem is expanded. */\n  @Input()\n  get expanded(): any { return this._expanded; }\n  set expanded(expanded: any) {\n    expanded = coerceBooleanProperty(expanded);\n\n    // Only emit events and update the internal value if the value changes.\n    if (this._expanded !== expanded) {\n      this._expanded = expanded;\n      this.expandedChange.emit(expanded);\n\n      if (expanded) {\n        this.opened.emit();\n        /**\n         * In the unique selection dispatcher, the id parameter is the id of the CdkAccordionItem,\n         * the name value is the id of the accordion.\n         */\n        const accordionId = this.accordion ? this.accordion.id : this.id;\n        this._expansionDispatcher.notify(this.id, accordionId);\n      } else {\n        this.closed.emit();\n      }\n\n      // Ensures that the animation will run when the value is set outside of an `@Input`.\n      // This includes cases like the open, close and toggle methods.\n      this._changeDetectorRef.markForCheck();\n    }\n  }\n  private _expanded = false;\n\n  /** Whether the AccordionItem is disabled. */\n  @Input()\n  get disabled() { return this._disabled; }\n  set disabled(disabled: any) { this._disabled = coerceBooleanProperty(disabled); }\n  private _disabled: boolean = false;\n\n  /** Unregister function for _expansionDispatcher. */\n  private _removeUniqueSelectionListener: () => void = () => {};\n\n  constructor(@Optional() @Inject(CDK_ACCORDION) @SkipSelf() public accordion: CdkAccordion,\n              private _changeDetectorRef: ChangeDetectorRef,\n              protected _expansionDispatcher: UniqueSelectionDispatcher) {\n    this._removeUniqueSelectionListener =\n      _expansionDispatcher.listen((id: string, accordionId: string) => {\n        if (this.accordion && !this.accordion.multi &&\n            this.accordion.id === accordionId && this.id !== id) {\n          this.expanded = false;\n        }\n      });\n\n    // When an accordion item is hosted in an accordion, subscribe to open/close events.\n    if (this.accordion) {\n      this._openCloseAllSubscription = this._subscribeToOpenCloseAllActions();\n    }\n  }\n\n  /** Emits an event for the accordion item being destroyed. */\n  ngOnDestroy() {\n    this.opened.complete();\n    this.closed.complete();\n    this.destroyed.emit();\n    this.destroyed.complete();\n    this._removeUniqueSelectionListener();\n    this._openCloseAllSubscription.unsubscribe();\n  }\n\n  /** Toggles the expanded state of the accordion item. */\n  toggle(): void {\n    if (!this.disabled) {\n      this.expanded = !this.expanded;\n    }\n  }\n\n  /** Sets the expanded state of the accordion item to false. */\n  close(): void {\n    if (!this.disabled) {\n      this.expanded = false;\n    }\n  }\n\n  /** Sets the expanded state of the accordion item to true. */\n  open(): void {\n    if (!this.disabled) {\n      this.expanded = true;\n    }\n  }\n\n  private _subscribeToOpenCloseAllActions(): Subscription {\n    return this.accordion._openCloseAllActions.subscribe(expanded => {\n      // Only change expanded state if item is enabled\n      if (!this.disabled) {\n        this.expanded = expanded;\n      }\n    });\n  }\n\n  static ngAcceptInputType_expanded: BooleanInput;\n  static ngAcceptInputType_disabled: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgModule} from '@angular/core';\nimport {CdkAccordion} from './accordion';\nimport {CdkAccordionItem} from './accordion-item';\n\n\n@NgModule({\n  exports: [CdkAccordion, CdkAccordionItem],\n  declarations: [CdkAccordion, CdkAccordionItem],\n})\nexport class CdkAccordionModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport {CdkAccordionItem} from './accordion-item';\nexport {CdkAccordion} from './accordion';\nexport * from './accordion-module';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n\nexport {CDK_ACCORDION as ɵangular_material_src_cdk_accordion_accordion_a} from './accordion';","export default function _nonIterableSpread() {\n  throw new TypeError(\"Invalid attempt to spread non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");\n}","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar window_1 = require(\"../../operator/window\");\nrxjs_1.Observable.prototype.window = window_1.window;\n//# sourceMappingURL=window.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Returns an Observable that mirrors the source Observable with the exception of an `error`. If the source Observable\n * calls `error`, this method will emit the Throwable that caused the error to the Observable returned from `notifier`.\n * If that Observable calls `complete` or `error` then this method will call `complete` or `error` on the child\n * subscription. Otherwise this method will resubscribe to the source Observable.\n *\n * <img src=\"./img/retryWhen.png\" width=\"100%\">\n *\n * @param {function(errors: Observable): Observable} notifier - Receives an Observable of notifications with which a\n * user can `complete` or `error`, aborting the retry.\n * @return {Observable} The source Observable modified with retry logic.\n * @method retryWhen\n * @owner Observable\n */\nfunction retryWhen(notifier) {\n    return operators_1.retryWhen(notifier)(this);\n}\nexports.retryWhen = retryWhen;\n//# sourceMappingURL=retryWhen.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT} from '@angular/common';\nimport {HttpClient, HttpErrorResponse} from '@angular/common/http';\nimport {\n  ErrorHandler,\n  Inject,\n  Injectable,\n  InjectionToken,\n  Optional,\n  SecurityContext,\n  SkipSelf,\n  OnDestroy,\n} from '@angular/core';\nimport {DomSanitizer, SafeResourceUrl, SafeHtml} from '@angular/platform-browser';\nimport {forkJoin, Observable, of as observableOf, throwError as observableThrow} from 'rxjs';\nimport {catchError, finalize, map, share, tap} from 'rxjs/operators';\n\n\n/**\n * Returns an exception to be thrown in the case when attempting to\n * load an icon with a name that cannot be found.\n * @docs-private\n */\nexport function getMatIconNameNotFoundError(iconName: string): Error {\n  return Error(`Unable to find icon with the name \"${iconName}\"`);\n}\n\n\n/**\n * Returns an exception to be thrown when the consumer attempts to use\n * `<mat-icon>` without including @angular/common/http.\n * @docs-private\n */\nexport function getMatIconNoHttpProviderError(): Error {\n  return Error('Could not find HttpClient provider for use with Angular Material icons. ' +\n               'Please include the HttpClientModule from @angular/common/http in your ' +\n               'app imports.');\n}\n\n\n/**\n * Returns an exception to be thrown when a URL couldn't be sanitized.\n * @param url URL that was attempted to be sanitized.\n * @docs-private\n */\nexport function getMatIconFailedToSanitizeUrlError(url: SafeResourceUrl): Error {\n  return Error(`The URL provided to MatIconRegistry was not trusted as a resource URL ` +\n               `via Angular's DomSanitizer. Attempted URL was \"${url}\".`);\n}\n\n/**\n * Returns an exception to be thrown when a HTML string couldn't be sanitized.\n * @param literal HTML that was attempted to be sanitized.\n * @docs-private\n */\nexport function getMatIconFailedToSanitizeLiteralError(literal: SafeHtml): Error {\n  return Error(`The literal provided to MatIconRegistry was not trusted as safe HTML by ` +\n               `Angular's DomSanitizer. Attempted literal was \"${literal}\".`);\n}\n\n/** Options that can be used to configure how an icon or the icons in an icon set are presented. */\nexport interface IconOptions {\n  /** View box to set on the icon. */\n  viewBox?: string;\n\n  /** Whether or not to fetch the icon or icon set using HTTP credentials. */\n  withCredentials?: boolean;\n}\n\n/**\n * Configuration for an icon, including the URL and possibly the cached SVG element.\n * @docs-private\n */\nclass SvgIconConfig {\n  svgElement: SVGElement | null;\n\n  constructor(\n    public url: SafeResourceUrl,\n    public svgText: string | null,\n    public options?: IconOptions) {}\n}\n\n/** Icon configuration whose content has already been loaded. */\ntype LoadedSvgIconConfig = SvgIconConfig & {svgText: string};\n\n/**\n * Service to register and display icons used by the `<mat-icon>` component.\n * - Registers icon URLs by namespace and name.\n * - Registers icon set URLs by namespace.\n * - Registers aliases for CSS classes, for use with icon fonts.\n * - Loads icons from URLs and extracts individual icons from icon sets.\n */\n@Injectable({providedIn: 'root'})\nexport class MatIconRegistry implements OnDestroy {\n  private _document: Document;\n\n  /**\n   * URLs and cached SVG elements for individual icons. Keys are of the format \"[namespace]:[icon]\".\n   */\n  private _svgIconConfigs = new Map<string, SvgIconConfig>();\n\n  /**\n   * SvgIconConfig objects and cached SVG elements for icon sets, keyed by namespace.\n   * Multiple icon sets can be registered under the same namespace.\n   */\n  private _iconSetConfigs = new Map<string, SvgIconConfig[]>();\n\n  /** Cache for icons loaded by direct URLs. */\n  private _cachedIconsByUrl = new Map<string, SVGElement>();\n\n  /** In-progress icon fetches. Used to coalesce multiple requests to the same URL. */\n  private _inProgressUrlFetches = new Map<string, Observable<string>>();\n\n  /** Map from font identifiers to their CSS class names. Used for icon fonts. */\n  private _fontCssClassesByAlias = new Map<string, string>();\n\n  /**\n   * The CSS class to apply when an `<mat-icon>` component has no icon name, url, or font specified.\n   * The default 'material-icons' value assumes that the material icon font has been loaded as\n   * described at http://google.github.io/material-design-icons/#icon-font-for-the-web\n   */\n  private _defaultFontSetClass = 'material-icons';\n\n  constructor(\n    @Optional() private _httpClient: HttpClient,\n    private _sanitizer: DomSanitizer,\n    @Optional() @Inject(DOCUMENT) document: any,\n    private readonly _errorHandler: ErrorHandler) {\n      this._document = document;\n    }\n\n  /**\n   * Registers an icon by URL in the default namespace.\n   * @param iconName Name under which the icon should be registered.\n   * @param url\n   */\n  addSvgIcon(iconName: string, url: SafeResourceUrl, options?: IconOptions): this {\n    return this.addSvgIconInNamespace('', iconName, url, options);\n  }\n\n  /**\n   * Registers an icon using an HTML string in the default namespace.\n   * @param iconName Name under which the icon should be registered.\n   * @param literal SVG source of the icon.\n   */\n  addSvgIconLiteral(iconName: string, literal: SafeHtml, options?: IconOptions): this {\n    return this.addSvgIconLiteralInNamespace('', iconName, literal, options);\n  }\n\n  /**\n   * Registers an icon by URL in the specified namespace.\n   * @param namespace Namespace in which the icon should be registered.\n   * @param iconName Name under which the icon should be registered.\n   * @param url\n   */\n  addSvgIconInNamespace(namespace: string, iconName: string, url: SafeResourceUrl,\n                        options?: IconOptions): this {\n    return this._addSvgIconConfig(namespace, iconName, new SvgIconConfig(url, null, options));\n  }\n\n  /**\n   * Registers an icon using an HTML string in the specified namespace.\n   * @param namespace Namespace in which the icon should be registered.\n   * @param iconName Name under which the icon should be registered.\n   * @param literal SVG source of the icon.\n   */\n  addSvgIconLiteralInNamespace(namespace: string, iconName: string, literal: SafeHtml,\n                               options?: IconOptions): this {\n    const cleanLiteral = this._sanitizer.sanitize(SecurityContext.HTML, literal);\n\n    // TODO: add an ngDevMode check\n    if (!cleanLiteral) {\n      throw getMatIconFailedToSanitizeLiteralError(literal);\n    }\n\n    return this._addSvgIconConfig(namespace, iconName,\n        new SvgIconConfig('', cleanLiteral, options));\n  }\n\n  /**\n   * Registers an icon set by URL in the default namespace.\n   * @param url\n   */\n  addSvgIconSet(url: SafeResourceUrl, options?: IconOptions): this {\n    return this.addSvgIconSetInNamespace('', url, options);\n  }\n\n  /**\n   * Registers an icon set using an HTML string in the default namespace.\n   * @param literal SVG source of the icon set.\n   */\n  addSvgIconSetLiteral(literal: SafeHtml, options?: IconOptions): this {\n    return this.addSvgIconSetLiteralInNamespace('', literal, options);\n  }\n\n  /**\n   * Registers an icon set by URL in the specified namespace.\n   * @param namespace Namespace in which to register the icon set.\n   * @param url\n   */\n  addSvgIconSetInNamespace(namespace: string, url: SafeResourceUrl, options?: IconOptions): this {\n    return this._addSvgIconSetConfig(namespace, new SvgIconConfig(url, null, options));\n  }\n\n  /**\n   * Registers an icon set using an HTML string in the specified namespace.\n   * @param namespace Namespace in which to register the icon set.\n   * @param literal SVG source of the icon set.\n   */\n  addSvgIconSetLiteralInNamespace(namespace: string, literal: SafeHtml,\n                                  options?: IconOptions): this {\n    const cleanLiteral = this._sanitizer.sanitize(SecurityContext.HTML, literal);\n\n    if (!cleanLiteral) {\n      throw getMatIconFailedToSanitizeLiteralError(literal);\n    }\n\n    return this._addSvgIconSetConfig(namespace, new SvgIconConfig('', cleanLiteral, options));\n  }\n\n  /**\n   * Defines an alias for a CSS class name to be used for icon fonts. Creating an matIcon\n   * component with the alias as the fontSet input will cause the class name to be applied\n   * to the `<mat-icon>` element.\n   *\n   * @param alias Alias for the font.\n   * @param className Class name override to be used instead of the alias.\n   */\n  registerFontClassAlias(alias: string, className: string = alias): this {\n    this._fontCssClassesByAlias.set(alias, className);\n    return this;\n  }\n\n  /**\n   * Returns the CSS class name associated with the alias by a previous call to\n   * registerFontClassAlias. If no CSS class has been associated, returns the alias unmodified.\n   */\n  classNameForFontAlias(alias: string): string {\n    return this._fontCssClassesByAlias.get(alias) || alias;\n  }\n\n  /**\n   * Sets the CSS class name to be used for icon fonts when an `<mat-icon>` component does not\n   * have a fontSet input value, and is not loading an icon by name or URL.\n   *\n   * @param className\n   */\n  setDefaultFontSetClass(className: string): this {\n    this._defaultFontSetClass = className;\n    return this;\n  }\n\n  /**\n   * Returns the CSS class name to be used for icon fonts when an `<mat-icon>` component does not\n   * have a fontSet input value, and is not loading an icon by name or URL.\n   */\n  getDefaultFontSetClass(): string {\n    return this._defaultFontSetClass;\n  }\n\n  /**\n   * Returns an Observable that produces the icon (as an `<svg>` DOM element) from the given URL.\n   * The response from the URL may be cached so this will not always cause an HTTP request, but\n   * the produced element will always be a new copy of the originally fetched icon. (That is,\n   * it will not contain any modifications made to elements previously returned).\n   *\n   * @param safeUrl URL from which to fetch the SVG icon.\n   */\n  getSvgIconFromUrl(safeUrl: SafeResourceUrl): Observable<SVGElement> {\n    const url = this._sanitizer.sanitize(SecurityContext.RESOURCE_URL, safeUrl);\n\n    if (!url) {\n      throw getMatIconFailedToSanitizeUrlError(safeUrl);\n    }\n\n    const cachedIcon = this._cachedIconsByUrl.get(url);\n\n    if (cachedIcon) {\n      return observableOf(cloneSvg(cachedIcon));\n    }\n\n    return this._loadSvgIconFromConfig(new SvgIconConfig(safeUrl, null)).pipe(\n      tap(svg => this._cachedIconsByUrl.set(url!, svg)),\n      map(svg => cloneSvg(svg)),\n    );\n  }\n\n  /**\n   * Returns an Observable that produces the icon (as an `<svg>` DOM element) with the given name\n   * and namespace. The icon must have been previously registered with addIcon or addIconSet;\n   * if not, the Observable will throw an error.\n   *\n   * @param name Name of the icon to be retrieved.\n   * @param namespace Namespace in which to look for the icon.\n   */\n  getNamedSvgIcon(name: string, namespace: string = ''): Observable<SVGElement> {\n    // Return (copy of) cached icon if possible.\n    const key = iconKey(namespace, name);\n    const config = this._svgIconConfigs.get(key);\n\n    if (config) {\n      return this._getSvgFromConfig(config);\n    }\n\n    // See if we have any icon sets registered for the namespace.\n    const iconSetConfigs = this._iconSetConfigs.get(namespace);\n\n    if (iconSetConfigs) {\n      return this._getSvgFromIconSetConfigs(name, iconSetConfigs);\n    }\n\n    return observableThrow(getMatIconNameNotFoundError(key));\n  }\n\n  ngOnDestroy() {\n   this._svgIconConfigs.clear();\n   this._iconSetConfigs.clear();\n   this._cachedIconsByUrl.clear();\n  }\n\n  /**\n   * Returns the cached icon for a SvgIconConfig if available, or fetches it from its URL if not.\n   */\n  private _getSvgFromConfig(config: SvgIconConfig): Observable<SVGElement> {\n    if (config.svgText) {\n      // We already have the SVG element for this icon, return a copy.\n      return observableOf(cloneSvg(this._svgElementFromConfig(config as LoadedSvgIconConfig)));\n    } else {\n      // Fetch the icon from the config's URL, cache it, and return a copy.\n      return this._loadSvgIconFromConfig(config).pipe(map(svg => cloneSvg(svg)));\n    }\n  }\n\n  /**\n   * Attempts to find an icon with the specified name in any of the SVG icon sets.\n   * First searches the available cached icons for a nested element with a matching name, and\n   * if found copies the element to a new `<svg>` element. If not found, fetches all icon sets\n   * that have not been cached, and searches again after all fetches are completed.\n   * The returned Observable produces the SVG element if possible, and throws\n   * an error if no icon with the specified name can be found.\n   */\n  private _getSvgFromIconSetConfigs(name: string, iconSetConfigs: SvgIconConfig[]):\n      Observable<SVGElement> {\n    // For all the icon set SVG elements we've fetched, see if any contain an icon with the\n    // requested name.\n    const namedIcon = this._extractIconWithNameFromAnySet(name, iconSetConfigs);\n\n    if (namedIcon) {\n      // We could cache namedIcon in _svgIconConfigs, but since we have to make a copy every\n      // time anyway, there's probably not much advantage compared to just always extracting\n      // it from the icon set.\n      return observableOf(namedIcon);\n    }\n\n    // Not found in any cached icon sets. If there are icon sets with URLs that we haven't\n    // fetched, fetch them now and look for iconName in the results.\n    const iconSetFetchRequests: Observable<string | null>[] = iconSetConfigs\n      .filter(iconSetConfig => !iconSetConfig.svgText)\n      .map(iconSetConfig => {\n        return this._loadSvgIconSetFromConfig(iconSetConfig).pipe(\n          catchError((err: HttpErrorResponse) => {\n            const url = this._sanitizer.sanitize(SecurityContext.RESOURCE_URL, iconSetConfig.url);\n\n            // Swallow errors fetching individual URLs so the\n            // combined Observable won't necessarily fail.\n            const errorMessage = `Loading icon set URL: ${url} failed: ${err.message}`;\n            this._errorHandler.handleError(new Error(errorMessage));\n            return observableOf(null);\n          })\n        );\n      });\n\n    // Fetch all the icon set URLs. When the requests complete, every IconSet should have a\n    // cached SVG element (unless the request failed), and we can check again for the icon.\n    return forkJoin(iconSetFetchRequests).pipe(map(() => {\n      const foundIcon = this._extractIconWithNameFromAnySet(name, iconSetConfigs);\n\n      // TODO: add an ngDevMode check\n      if (!foundIcon) {\n        throw getMatIconNameNotFoundError(name);\n      }\n\n      return foundIcon;\n    }));\n  }\n\n  /**\n   * Searches the cached SVG elements for the given icon sets for a nested icon element whose \"id\"\n   * tag matches the specified name. If found, copies the nested element to a new SVG element and\n   * returns it. Returns null if no matching element is found.\n   */\n  private _extractIconWithNameFromAnySet(iconName: string, iconSetConfigs: SvgIconConfig[]):\n      SVGElement | null {\n    // Iterate backwards, so icon sets added later have precedence.\n    for (let i = iconSetConfigs.length - 1; i >= 0; i--) {\n      const config = iconSetConfigs[i];\n\n      // Parsing the icon set's text into an SVG element can be expensive. We can avoid some of\n      // the parsing by doing a quick check using `indexOf` to see if there's any chance for the\n      // icon to be in the set. This won't be 100% accurate, but it should help us avoid at least\n      // some of the parsing.\n      if (config.svgText && config.svgText.indexOf(iconName) > -1) {\n        const svg = this._svgElementFromConfig(config as LoadedSvgIconConfig);\n        const foundIcon = this._extractSvgIconFromSet(svg, iconName, config.options);\n        if (foundIcon) {\n          return foundIcon;\n        }\n      }\n    }\n    return null;\n  }\n\n  /**\n   * Loads the content of the icon URL specified in the SvgIconConfig and creates an SVG element\n   * from it.\n   */\n  private _loadSvgIconFromConfig(config: SvgIconConfig): Observable<SVGElement> {\n    return this._fetchIcon(config).pipe(\n      tap(svgText => config.svgText = svgText),\n      map(() => this._svgElementFromConfig(config as LoadedSvgIconConfig))\n    );\n  }\n\n  /**\n   * Loads the content of the icon set URL specified in the\n   * SvgIconConfig and attaches it to the config.\n   */\n  private _loadSvgIconSetFromConfig(config: SvgIconConfig): Observable<string | null> {\n    if (config.svgText) {\n      return observableOf(null);\n    }\n\n    return this._fetchIcon(config).pipe(tap(svgText => config.svgText = svgText));\n  }\n\n  /**\n   * Searches the cached element of the given SvgIconConfig for a nested icon element whose \"id\"\n   * tag matches the specified name. If found, copies the nested element to a new SVG element and\n   * returns it. Returns null if no matching element is found.\n   */\n  private _extractSvgIconFromSet(iconSet: SVGElement, iconName: string,\n                                 options?: IconOptions): SVGElement | null {\n    // Use the `id=\"iconName\"` syntax in order to escape special\n    // characters in the ID (versus using the #iconName syntax).\n    const iconSource = iconSet.querySelector(`[id=\"${iconName}\"]`);\n\n    if (!iconSource) {\n      return null;\n    }\n\n    // Clone the element and remove the ID to prevent multiple elements from being added\n    // to the page with the same ID.\n    const iconElement = iconSource.cloneNode(true) as Element;\n    iconElement.removeAttribute('id');\n\n    // If the icon node is itself an <svg> node, clone and return it directly. If not, set it as\n    // the content of a new <svg> node.\n    if (iconElement.nodeName.toLowerCase() === 'svg') {\n      return this._setSvgAttributes(iconElement as SVGElement, options);\n    }\n\n    // If the node is a <symbol>, it won't be rendered so we have to convert it into <svg>. Note\n    // that the same could be achieved by referring to it via <use href=\"#id\">, however the <use>\n    // tag is problematic on Firefox, because it needs to include the current page path.\n    if (iconElement.nodeName.toLowerCase() === 'symbol') {\n      return this._setSvgAttributes(this._toSvgElement(iconElement), options);\n    }\n\n    // createElement('SVG') doesn't work as expected; the DOM ends up with\n    // the correct nodes, but the SVG content doesn't render. Instead we\n    // have to create an empty SVG node using innerHTML and append its content.\n    // Elements created using DOMParser.parseFromString have the same problem.\n    // http://stackoverflow.com/questions/23003278/svg-innerhtml-in-firefox-can-not-display\n    const svg = this._svgElementFromString('<svg></svg>');\n    // Clone the node so we don't remove it from the parent icon set element.\n    svg.appendChild(iconElement);\n\n    return this._setSvgAttributes(svg, options);\n  }\n\n  /**\n   * Creates a DOM element from the given SVG string.\n   */\n  private _svgElementFromString(str: string): SVGElement {\n    const div = this._document.createElement('DIV');\n    div.innerHTML = str;\n    const svg = div.querySelector('svg') as SVGElement;\n\n    // TODO: add an ngDevMode check\n    if (!svg) {\n      throw Error('<svg> tag not found');\n    }\n\n    return svg;\n  }\n\n  /**\n   * Converts an element into an SVG node by cloning all of its children.\n   */\n  private _toSvgElement(element: Element): SVGElement {\n    const svg = this._svgElementFromString('<svg></svg>');\n    const attributes = element.attributes;\n\n    // Copy over all the attributes from the `symbol` to the new SVG, except the id.\n    for (let i = 0; i < attributes.length; i++) {\n      const {name, value} = attributes[i];\n\n      if (name !== 'id') {\n        svg.setAttribute(name, value);\n      }\n    }\n\n    for (let i = 0; i < element.childNodes.length; i++) {\n      if (element.childNodes[i].nodeType === this._document.ELEMENT_NODE) {\n        svg.appendChild(element.childNodes[i].cloneNode(true));\n      }\n    }\n\n    return svg;\n  }\n\n  /**\n   * Sets the default attributes for an SVG element to be used as an icon.\n   */\n  private _setSvgAttributes(svg: SVGElement, options?: IconOptions): SVGElement {\n    svg.setAttribute('fit', '');\n    svg.setAttribute('height', '100%');\n    svg.setAttribute('width', '100%');\n    svg.setAttribute('preserveAspectRatio', 'xMidYMid meet');\n    svg.setAttribute('focusable', 'false'); // Disable IE11 default behavior to make SVGs focusable.\n\n    if (options && options.viewBox) {\n      svg.setAttribute('viewBox', options.viewBox);\n    }\n\n    return svg;\n  }\n\n  /**\n   * Returns an Observable which produces the string contents of the given icon. Results may be\n   * cached, so future calls with the same URL may not cause another HTTP request.\n   */\n  private _fetchIcon(iconConfig: SvgIconConfig): Observable<string> {\n    const {url: safeUrl, options} = iconConfig;\n    const withCredentials = options?.withCredentials ?? false;\n\n    if (!this._httpClient) {\n      throw getMatIconNoHttpProviderError();\n    }\n\n    // TODO: add an ngDevMode check\n    if (safeUrl == null) {\n      throw Error(`Cannot fetch icon from URL \"${safeUrl}\".`);\n    }\n\n    const url = this._sanitizer.sanitize(SecurityContext.RESOURCE_URL, safeUrl);\n\n    // TODO: add an ngDevMode check\n    if (!url) {\n      throw getMatIconFailedToSanitizeUrlError(safeUrl);\n    }\n\n    // Store in-progress fetches to avoid sending a duplicate request for a URL when there is\n    // already a request in progress for that URL. It's necessary to call share() on the\n    // Observable returned by http.get() so that multiple subscribers don't cause multiple XHRs.\n    const inProgressFetch = this._inProgressUrlFetches.get(url);\n\n    if (inProgressFetch) {\n      return inProgressFetch;\n    }\n\n    const req = this._httpClient.get(url, {responseType: 'text', withCredentials}).pipe(\n      finalize(() => this._inProgressUrlFetches.delete(url)),\n      share(),\n    );\n\n    this._inProgressUrlFetches.set(url, req);\n    return req;\n  }\n\n  /**\n   * Registers an icon config by name in the specified namespace.\n   * @param namespace Namespace in which to register the icon config.\n   * @param iconName Name under which to register the config.\n   * @param config Config to be registered.\n   */\n  private _addSvgIconConfig(namespace: string, iconName: string, config: SvgIconConfig): this {\n    this._svgIconConfigs.set(iconKey(namespace, iconName), config);\n    return this;\n  }\n\n  /**\n   * Registers an icon set config in the specified namespace.\n   * @param namespace Namespace in which to register the icon config.\n   * @param config Config to be registered.\n   */\n  private _addSvgIconSetConfig(namespace: string, config: SvgIconConfig): this {\n    const configNamespace = this._iconSetConfigs.get(namespace);\n\n    if (configNamespace) {\n      configNamespace.push(config);\n    } else {\n      this._iconSetConfigs.set(namespace, [config]);\n    }\n\n    return this;\n  }\n\n  /** Parses a config's text into an SVG element. */\n  private _svgElementFromConfig(config: LoadedSvgIconConfig): SVGElement {\n    if (!config.svgElement) {\n      const svg = this._svgElementFromString(config.svgText);\n      this._setSvgAttributes(svg, config.options);\n      config.svgElement = svg;\n    }\n\n    return config.svgElement;\n  }\n}\n\n/** @docs-private */\nexport function ICON_REGISTRY_PROVIDER_FACTORY(\n  parentRegistry: MatIconRegistry,\n  httpClient: HttpClient,\n  sanitizer: DomSanitizer,\n  errorHandler: ErrorHandler,\n  document?: any) {\n  return parentRegistry || new MatIconRegistry(httpClient, sanitizer, document, errorHandler);\n}\n\n/** @docs-private */\nexport const ICON_REGISTRY_PROVIDER = {\n  // If there is already an MatIconRegistry available, use that. Otherwise, provide a new one.\n  provide: MatIconRegistry,\n  deps: [\n    [new Optional(), new SkipSelf(), MatIconRegistry],\n    [new Optional(), HttpClient],\n    DomSanitizer,\n    ErrorHandler,\n    [new Optional(), DOCUMENT as InjectionToken<any>],\n  ],\n  useFactory: ICON_REGISTRY_PROVIDER_FACTORY,\n};\n\n/** Clones an SVGElement while preserving type information. */\nfunction cloneSvg(svg: SVGElement): SVGElement {\n  return svg.cloneNode(true) as SVGElement;\n}\n\n/** Returns the cache key to use for an icon namespace and name. */\nfunction iconKey(namespace: string, name: string) {\n  return namespace + ':' + name;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {DOCUMENT} from '@angular/common';\nimport {\n  AfterViewChecked,\n  Attribute,\n  ChangeDetectionStrategy,\n  Component,\n  ElementRef,\n  ErrorHandler,\n  inject,\n  Inject,\n  InjectionToken,\n  Input,\n  OnChanges,\n  OnDestroy,\n  OnInit,\n  SimpleChanges,\n  ViewEncapsulation,\n} from '@angular/core';\nimport {CanColor, CanColorCtor, mixinColor} from '@angular/material/core';\nimport {Subscription} from 'rxjs';\nimport {take} from 'rxjs/operators';\n\nimport {MatIconRegistry} from './icon-registry';\n\n\n// Boilerplate for applying mixins to MatIcon.\n/** @docs-private */\nclass MatIconBase {\n  constructor(public _elementRef: ElementRef) {}\n}\nconst _MatIconMixinBase: CanColorCtor & typeof MatIconBase = mixinColor(MatIconBase);\n\n/**\n * Injection token used to provide the current location to `MatIcon`.\n * Used to handle server-side rendering and to stub out during unit tests.\n * @docs-private\n */\nexport const MAT_ICON_LOCATION = new InjectionToken<MatIconLocation>('mat-icon-location', {\n  providedIn: 'root',\n  factory: MAT_ICON_LOCATION_FACTORY\n});\n\n/**\n * Stubbed out location for `MatIcon`.\n * @docs-private\n */\nexport interface MatIconLocation {\n  getPathname: () => string;\n}\n\n/** @docs-private */\nexport function MAT_ICON_LOCATION_FACTORY(): MatIconLocation {\n  const _document = inject(DOCUMENT);\n  const _location = _document ? _document.location : null;\n\n  return {\n    // Note that this needs to be a function, rather than a property, because Angular\n    // will only resolve it once, but we want the current path on each call.\n    getPathname: () => _location ? (_location.pathname + _location.search) : ''\n  };\n}\n\n\n/** SVG attributes that accept a FuncIRI (e.g. `url(<something>)`). */\nconst funcIriAttributes = [\n  'clip-path',\n  'color-profile',\n  'src',\n  'cursor',\n  'fill',\n  'filter',\n  'marker',\n  'marker-start',\n  'marker-mid',\n  'marker-end',\n  'mask',\n  'stroke'\n];\n\n/** Selector that can be used to find all elements that are using a `FuncIRI`. */\nconst funcIriAttributeSelector = funcIriAttributes.map(attr => `[${attr}]`).join(', ');\n\n/** Regex that can be used to extract the id out of a FuncIRI. */\nconst funcIriPattern = /^url\\(['\"]?#(.*?)['\"]?\\)$/;\n\n/**\n * Component to display an icon. It can be used in the following ways:\n *\n * - Specify the svgIcon input to load an SVG icon from a URL previously registered with the\n *   addSvgIcon, addSvgIconInNamespace, addSvgIconSet, or addSvgIconSetInNamespace methods of\n *   MatIconRegistry. If the svgIcon value contains a colon it is assumed to be in the format\n *   \"[namespace]:[name]\", if not the value will be the name of an icon in the default namespace.\n *   Examples:\n *     `<mat-icon svgIcon=\"left-arrow\"></mat-icon>\n *     <mat-icon svgIcon=\"animals:cat\"></mat-icon>`\n *\n * - Use a font ligature as an icon by putting the ligature text in the content of the `<mat-icon>`\n *   component. By default the Material icons font is used as described at\n *   http://google.github.io/material-design-icons/#icon-font-for-the-web. You can specify an\n *   alternate font by setting the fontSet input to either the CSS class to apply to use the\n *   desired font, or to an alias previously registered with MatIconRegistry.registerFontClassAlias.\n *   Examples:\n *     `<mat-icon>home</mat-icon>\n *     <mat-icon fontSet=\"myfont\">sun</mat-icon>`\n *\n * - Specify a font glyph to be included via CSS rules by setting the fontSet input to specify the\n *   font, and the fontIcon input to specify the icon. Typically the fontIcon will specify a\n *   CSS class which causes the glyph to be displayed via a :before selector, as in\n *   https://fortawesome.github.io/Font-Awesome/examples/\n *   Example:\n *     `<mat-icon fontSet=\"fa\" fontIcon=\"alarm\"></mat-icon>`\n */\n@Component({\n  template: '<ng-content></ng-content>',\n  selector: 'mat-icon',\n  exportAs: 'matIcon',\n  styleUrls: ['icon.css'],\n  inputs: ['color'],\n  host: {\n    'role': 'img',\n    'class': 'mat-icon notranslate',\n    '[attr.data-mat-icon-type]': '_usingFontIcon() ? \"font\" : \"svg\"',\n    '[attr.data-mat-icon-name]': '_svgName || fontIcon',\n    '[attr.data-mat-icon-namespace]': '_svgNamespace || fontSet',\n    '[class.mat-icon-inline]': 'inline',\n    '[class.mat-icon-no-color]': 'color !== \"primary\" && color !== \"accent\" && color !== \"warn\"',\n  },\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n})\nexport class MatIcon extends _MatIconMixinBase implements OnChanges, OnInit, AfterViewChecked,\n  CanColor, OnDestroy {\n\n  /**\n   * Whether the icon should be inlined, automatically sizing the icon to match the font size of\n   * the element the icon is contained in.\n   */\n  @Input()\n  get inline(): boolean {\n    return this._inline;\n  }\n  set inline(inline: boolean) {\n    this._inline = coerceBooleanProperty(inline);\n  }\n  private _inline: boolean = false;\n\n  /** Name of the icon in the SVG icon set. */\n  @Input() svgIcon: string;\n\n  /** Font set that the icon is a part of. */\n  @Input()\n  get fontSet(): string { return this._fontSet; }\n  set fontSet(value: string) {\n    this._fontSet = this._cleanupFontValue(value);\n  }\n  private _fontSet: string;\n\n  /** Name of an icon within a font set. */\n  @Input()\n  get fontIcon(): string { return this._fontIcon; }\n  set fontIcon(value: string) {\n    this._fontIcon = this._cleanupFontValue(value);\n  }\n  private _fontIcon: string;\n\n  private _previousFontSetClass: string;\n  private _previousFontIconClass: string;\n\n  _svgName: string | null;\n  _svgNamespace: string | null;\n\n  /** Keeps track of the current page path. */\n  private _previousPath?: string;\n\n  /** Keeps track of the elements and attributes that we've prefixed with the current path. */\n  private _elementsWithExternalReferences?: Map<Element, {name: string, value: string}[]>;\n\n  /** Subscription to the current in-progress SVG icon request. */\n  private _currentIconFetch = Subscription.EMPTY;\n\n  constructor(\n      elementRef: ElementRef<HTMLElement>, private _iconRegistry: MatIconRegistry,\n      @Attribute('aria-hidden') ariaHidden: string,\n      @Inject(MAT_ICON_LOCATION) private _location: MatIconLocation,\n      private readonly _errorHandler: ErrorHandler) {\n    super(elementRef);\n\n    // If the user has not explicitly set aria-hidden, mark the icon as hidden, as this is\n    // the right thing to do for the majority of icon use-cases.\n    if (!ariaHidden) {\n      elementRef.nativeElement.setAttribute('aria-hidden', 'true');\n    }\n  }\n\n  /**\n   * Splits an svgIcon binding value into its icon set and icon name components.\n   * Returns a 2-element array of [(icon set), (icon name)].\n   * The separator for the two fields is ':'. If there is no separator, an empty\n   * string is returned for the icon set and the entire value is returned for\n   * the icon name. If the argument is falsy, returns an array of two empty strings.\n   * Throws an error if the name contains two or more ':' separators.\n   * Examples:\n   *   `'social:cake' -> ['social', 'cake']\n   *   'penguin' -> ['', 'penguin']\n   *   null -> ['', '']\n   *   'a:b:c' -> (throws Error)`\n   */\n  private _splitIconName(iconName: string): [string, string] {\n    if (!iconName) {\n      return ['', ''];\n    }\n    const parts = iconName.split(':');\n    switch (parts.length) {\n      case 1: return ['', parts[0]]; // Use default namespace.\n      case 2: return <[string, string]>parts;\n      default: throw Error(`Invalid icon name: \"${iconName}\"`); // TODO: add an ngDevMode check\n    }\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    // Only update the inline SVG icon if the inputs changed, to avoid unnecessary DOM operations.\n    const svgIconChanges = changes['svgIcon'];\n\n    this._svgNamespace = null;\n    this._svgName = null;\n\n    if (svgIconChanges) {\n      this._currentIconFetch.unsubscribe();\n\n      if (this.svgIcon) {\n        const [namespace, iconName] = this._splitIconName(this.svgIcon);\n\n        if (namespace) {\n          this._svgNamespace = namespace;\n        }\n\n        if (iconName) {\n          this._svgName = iconName;\n        }\n\n        this._currentIconFetch = this._iconRegistry.getNamedSvgIcon(iconName, namespace)\n            .pipe(take(1))\n            .subscribe(svg => this._setSvgElement(svg), (err: Error) => {\n              const errorMessage = `Error retrieving icon ${namespace}:${iconName}! ${err.message}`;\n              this._errorHandler.handleError(new Error(errorMessage));\n            });\n      } else if (svgIconChanges.previousValue) {\n        this._clearSvgElement();\n      }\n    }\n\n    if (this._usingFontIcon()) {\n      this._updateFontIconClasses();\n    }\n  }\n\n  ngOnInit() {\n    // Update font classes because ngOnChanges won't be called if none of the inputs are present,\n    // e.g. <mat-icon>arrow</mat-icon> In this case we need to add a CSS class for the default font.\n    if (this._usingFontIcon()) {\n      this._updateFontIconClasses();\n    }\n  }\n\n  ngAfterViewChecked() {\n    const cachedElements = this._elementsWithExternalReferences;\n\n    if (cachedElements && cachedElements.size) {\n      const newPath = this._location.getPathname();\n\n      // We need to check whether the URL has changed on each change detection since\n      // the browser doesn't have an API that will let us react on link clicks and\n      // we can't depend on the Angular router. The references need to be updated,\n      // because while most browsers don't care whether the URL is correct after\n      // the first render, Safari will break if the user navigates to a different\n      // page and the SVG isn't re-rendered.\n      if (newPath !== this._previousPath) {\n        this._previousPath = newPath;\n        this._prependPathToReferences(newPath);\n      }\n    }\n  }\n\n  ngOnDestroy() {\n    this._currentIconFetch.unsubscribe();\n\n    if (this._elementsWithExternalReferences) {\n      this._elementsWithExternalReferences.clear();\n    }\n  }\n\n  _usingFontIcon(): boolean {\n    return !this.svgIcon;\n  }\n\n  private _setSvgElement(svg: SVGElement) {\n    this._clearSvgElement();\n\n    // Workaround for IE11 and Edge ignoring `style` tags inside dynamically-created SVGs.\n    // See: https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/10898469/\n    // Do this before inserting the element into the DOM, in order to avoid a style recalculation.\n    const styleTags = svg.querySelectorAll('style') as NodeListOf<HTMLStyleElement>;\n\n    for (let i = 0; i < styleTags.length; i++) {\n      styleTags[i].textContent += ' ';\n    }\n\n    // Note: we do this fix here, rather than the icon registry, because the\n    // references have to point to the URL at the time that the icon was created.\n    const path = this._location.getPathname();\n    this._previousPath = path;\n    this._cacheChildrenWithExternalReferences(svg);\n    this._prependPathToReferences(path);\n    this._elementRef.nativeElement.appendChild(svg);\n  }\n\n  private _clearSvgElement() {\n    const layoutElement: HTMLElement = this._elementRef.nativeElement;\n    let childCount = layoutElement.childNodes.length;\n\n    if (this._elementsWithExternalReferences) {\n      this._elementsWithExternalReferences.clear();\n    }\n\n    // Remove existing non-element child nodes and SVGs, and add the new SVG element. Note that\n    // we can't use innerHTML, because IE will throw if the element has a data binding.\n    while (childCount--) {\n      const child = layoutElement.childNodes[childCount];\n\n      // 1 corresponds to Node.ELEMENT_NODE. We remove all non-element nodes in order to get rid\n      // of any loose text nodes, as well as any SVG elements in order to remove any old icons.\n      if (child.nodeType !== 1 || child.nodeName.toLowerCase() === 'svg') {\n        layoutElement.removeChild(child);\n      }\n    }\n  }\n\n  private _updateFontIconClasses() {\n    if (!this._usingFontIcon()) {\n      return;\n    }\n\n    const elem: HTMLElement = this._elementRef.nativeElement;\n    const fontSetClass = this.fontSet ?\n        this._iconRegistry.classNameForFontAlias(this.fontSet) :\n        this._iconRegistry.getDefaultFontSetClass();\n\n    if (fontSetClass != this._previousFontSetClass) {\n      if (this._previousFontSetClass) {\n        elem.classList.remove(this._previousFontSetClass);\n      }\n      if (fontSetClass) {\n        elem.classList.add(fontSetClass);\n      }\n      this._previousFontSetClass = fontSetClass;\n    }\n\n    if (this.fontIcon != this._previousFontIconClass) {\n      if (this._previousFontIconClass) {\n        elem.classList.remove(this._previousFontIconClass);\n      }\n      if (this.fontIcon) {\n        elem.classList.add(this.fontIcon);\n      }\n      this._previousFontIconClass = this.fontIcon;\n    }\n  }\n\n  /**\n   * Cleans up a value to be used as a fontIcon or fontSet.\n   * Since the value ends up being assigned as a CSS class, we\n   * have to trim the value and omit space-separated values.\n   */\n  private _cleanupFontValue(value: string) {\n    return typeof value === 'string' ? value.trim().split(' ')[0] : value;\n  }\n\n  /**\n   * Prepends the current path to all elements that have an attribute pointing to a `FuncIRI`\n   * reference. This is required because WebKit browsers require references to be prefixed with\n   * the current path, if the page has a `base` tag.\n   */\n  private _prependPathToReferences(path: string) {\n    const elements = this._elementsWithExternalReferences;\n\n    if (elements) {\n      elements.forEach((attrs, element) => {\n        attrs.forEach(attr => {\n          element.setAttribute(attr.name, `url('${path}#${attr.value}')`);\n        });\n      });\n    }\n  }\n\n  /**\n   * Caches the children of an SVG element that have `url()`\n   * references that we need to prefix with the current path.\n   */\n  private _cacheChildrenWithExternalReferences(element: SVGElement) {\n    const elementsWithFuncIri = element.querySelectorAll(funcIriAttributeSelector);\n    const elements = this._elementsWithExternalReferences =\n        this._elementsWithExternalReferences || new Map();\n\n    for (let i = 0; i < elementsWithFuncIri.length; i++) {\n      funcIriAttributes.forEach(attr => {\n        const elementWithReference = elementsWithFuncIri[i];\n        const value = elementWithReference.getAttribute(attr);\n        const match = value ? value.match(funcIriPattern) : null;\n\n        if (match) {\n          let attributes = elements.get(elementWithReference);\n\n          if (!attributes) {\n            attributes = [];\n            elements.set(elementWithReference, attributes);\n          }\n\n          attributes!.push({name: attr, value: match[1]});\n        }\n      });\n    }\n  }\n\n  static ngAcceptInputType_inline: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgModule} from '@angular/core';\nimport {MatCommonModule} from '@angular/material/core';\nimport {MatIcon} from './icon';\n\n\n@NgModule({\n  imports: [MatCommonModule],\n  exports: [MatIcon, MatCommonModule],\n  declarations: [MatIcon],\n})\nexport class MatIconModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './icon-module';\nexport * from './icon';\nexport * from './icon-registry';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","import { Subject } from './Subject';\nimport { Subscription } from './Subscription';\nexport class AsyncSubject extends Subject {\n    constructor() {\n        super(...arguments);\n        this.value = null;\n        this.hasNext = false;\n        this.hasCompleted = false;\n    }\n    _subscribe(subscriber) {\n        if (this.hasError) {\n            subscriber.error(this.thrownError);\n            return Subscription.EMPTY;\n        }\n        else if (this.hasCompleted && this.hasNext) {\n            subscriber.next(this.value);\n            subscriber.complete();\n            return Subscription.EMPTY;\n        }\n        return super._subscribe(subscriber);\n    }\n    next(value) {\n        if (!this.hasCompleted) {\n            this.value = value;\n            this.hasNext = true;\n        }\n    }\n    error(error) {\n        if (!this.hasCompleted) {\n            super.error(error);\n        }\n    }\n    complete() {\n        this.hasCompleted = true;\n        if (this.hasNext) {\n            super.next(this.value);\n        }\n        super.complete();\n    }\n}\n//# sourceMappingURL=AsyncSubject.js.map","export function hostReportError(err) {\n    setTimeout(() => { throw err; }, 0);\n}\n//# sourceMappingURL=hostReportError.js.map","import { EmptyError } from '../util/EmptyError';\nimport { filter } from './filter';\nimport { takeLast } from './takeLast';\nimport { throwIfEmpty } from './throwIfEmpty';\nimport { defaultIfEmpty } from './defaultIfEmpty';\nimport { identity } from '../util/identity';\nexport function last(predicate, defaultValue) {\n    const hasDefaultValue = arguments.length >= 2;\n    return (source) => source.pipe(predicate ? filter((v, i) => predicate(v, i, source)) : identity, takeLast(1), hasDefaultValue ? defaultIfEmpty(defaultValue) : throwIfEmpty(() => new EmptyError()));\n}\n//# sourceMappingURL=last.js.map","import { Observable } from '../Observable';\nexport function range(start = 0, count, scheduler) {\n    return new Observable(subscriber => {\n        if (count === undefined) {\n            count = start;\n            start = 0;\n        }\n        let index = 0;\n        let current = start;\n        if (scheduler) {\n            return scheduler.schedule(dispatch, 0, {\n                index, count, start, subscriber\n            });\n        }\n        else {\n            do {\n                if (index++ >= count) {\n                    subscriber.complete();\n                    break;\n                }\n                subscriber.next(current++);\n                if (subscriber.closed) {\n                    break;\n                }\n            } while (true);\n        }\n        return undefined;\n    });\n}\nexport function dispatch(state) {\n    const { start, index, count, subscriber } = state;\n    if (index >= count) {\n        subscriber.complete();\n        return;\n    }\n    subscriber.next(start);\n    if (subscriber.closed) {\n        return;\n    }\n    state.index = index + 1;\n    state.start = start + 1;\n    this.schedule(state);\n}\n//# sourceMappingURL=range.js.map","import { Observable } from '../Observable';\nimport { from } from './from';\nimport { empty } from './empty';\nexport function defer(observableFactory) {\n    return new Observable(subscriber => {\n        let input;\n        try {\n            input = observableFactory();\n        }\n        catch (err) {\n            subscriber.error(err);\n            return undefined;\n        }\n        const source = input ? from(input) : empty();\n        return source.subscribe(subscriber);\n    });\n}\n//# sourceMappingURL=defer.js.map","import { Subject } from '../Subject';\nimport { multicast } from './multicast';\nexport function publish(selector) {\n    return selector ?\n        multicast(() => new Subject(), selector) :\n        multicast(new Subject());\n}\n//# sourceMappingURL=publish.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar partition_1 = require(\"../../operator/partition\");\nrxjs_1.Observable.prototype.partition = partition_1.partition;\n//# sourceMappingURL=partition.js.map","function _getPrototypeOf(o) {\n  module.exports = _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {\n    return o.__proto__ || Object.getPrototypeOf(o);\n  };\n  return _getPrototypeOf(o);\n}\n\nmodule.exports = _getPrototypeOf;","import { isArray } from '../util/isArray';\nimport { fromArray } from './fromArray';\nimport { OuterSubscriber } from '../OuterSubscriber';\nimport { subscribeToResult } from '../util/subscribeToResult';\nexport function race(...observables) {\n    if (observables.length === 1) {\n        if (isArray(observables[0])) {\n            observables = observables[0];\n        }\n        else {\n            return observables[0];\n        }\n    }\n    return fromArray(observables, undefined).lift(new RaceOperator());\n}\nexport class RaceOperator {\n    call(subscriber, source) {\n        return source.subscribe(new RaceSubscriber(subscriber));\n    }\n}\nexport class RaceSubscriber extends OuterSubscriber {\n    constructor(destination) {\n        super(destination);\n        this.hasFirst = false;\n        this.observables = [];\n        this.subscriptions = [];\n    }\n    _next(observable) {\n        this.observables.push(observable);\n    }\n    _complete() {\n        const observables = this.observables;\n        const len = observables.length;\n        if (len === 0) {\n            this.destination.complete();\n        }\n        else {\n            for (let i = 0; i < len && !this.hasFirst; i++) {\n                const observable = observables[i];\n                const subscription = subscribeToResult(this, observable, undefined, i);\n                if (this.subscriptions) {\n                    this.subscriptions.push(subscription);\n                }\n                this.add(subscription);\n            }\n            this.observables = null;\n        }\n    }\n    notifyNext(_outerValue, innerValue, outerIndex) {\n        if (!this.hasFirst) {\n            this.hasFirst = true;\n            for (let i = 0; i < this.subscriptions.length; i++) {\n                if (i !== outerIndex) {\n                    let subscription = this.subscriptions[i];\n                    subscription.unsubscribe();\n                    this.remove(subscription);\n                }\n            }\n            this.subscriptions = null;\n        }\n        this.destination.next(innerValue);\n    }\n}\n//# sourceMappingURL=race.js.map","import { Observable } from '../Observable';\nimport { asap } from '../scheduler/asap';\nimport { isNumeric } from '../util/isNumeric';\nexport class SubscribeOnObservable extends Observable {\n    constructor(source, delayTime = 0, scheduler = asap) {\n        super();\n        this.source = source;\n        this.delayTime = delayTime;\n        this.scheduler = scheduler;\n        if (!isNumeric(delayTime) || delayTime < 0) {\n            this.delayTime = 0;\n        }\n        if (!scheduler || typeof scheduler.schedule !== 'function') {\n            this.scheduler = asap;\n        }\n    }\n    static create(source, delay = 0, scheduler = asap) {\n        return new SubscribeOnObservable(source, delay, scheduler);\n    }\n    static dispatch(arg) {\n        const { source, subscriber } = arg;\n        return this.add(source.subscribe(subscriber));\n    }\n    _subscribe(subscriber) {\n        const delay = this.delayTime;\n        const source = this.source;\n        const scheduler = this.scheduler;\n        return scheduler.schedule(SubscribeOnObservable.dispatch, delay, {\n            source, subscriber\n        });\n    }\n}\n//# sourceMappingURL=SubscribeOnObservable.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.forkJoin = rxjs_1.forkJoin;\n//# sourceMappingURL=forkJoin.js.map","import arrayWithHoles from \"./arrayWithHoles\";\nimport iterableToArrayLimit from \"./iterableToArrayLimit\";\nimport unsupportedIterableToArray from \"./unsupportedIterableToArray\";\nimport nonIterableRest from \"./nonIterableRest\";\nexport default function _slicedToArray(arr, i) {\n  return arrayWithHoles(arr) || iterableToArrayLimit(arr, i) || unsupportedIterableToArray(arr, i) || nonIterableRest();\n}","import { Subscriber } from '../Subscriber';\nimport { Subscription } from '../Subscription';\nimport { Observable } from '../Observable';\nimport { Subject } from '../Subject';\nexport function groupBy(keySelector, elementSelector, durationSelector, subjectSelector) {\n    return (source) => source.lift(new GroupByOperator(keySelector, elementSelector, durationSelector, subjectSelector));\n}\nclass GroupByOperator {\n    constructor(keySelector, elementSelector, durationSelector, subjectSelector) {\n        this.keySelector = keySelector;\n        this.elementSelector = elementSelector;\n        this.durationSelector = durationSelector;\n        this.subjectSelector = subjectSelector;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new GroupBySubscriber(subscriber, this.keySelector, this.elementSelector, this.durationSelector, this.subjectSelector));\n    }\n}\nclass GroupBySubscriber extends Subscriber {\n    constructor(destination, keySelector, elementSelector, durationSelector, subjectSelector) {\n        super(destination);\n        this.keySelector = keySelector;\n        this.elementSelector = elementSelector;\n        this.durationSelector = durationSelector;\n        this.subjectSelector = subjectSelector;\n        this.groups = null;\n        this.attemptedToUnsubscribe = false;\n        this.count = 0;\n    }\n    _next(value) {\n        let key;\n        try {\n            key = this.keySelector(value);\n        }\n        catch (err) {\n            this.error(err);\n            return;\n        }\n        this._group(value, key);\n    }\n    _group(value, key) {\n        let groups = this.groups;\n        if (!groups) {\n            groups = this.groups = new Map();\n        }\n        let group = groups.get(key);\n        let element;\n        if (this.elementSelector) {\n            try {\n                element = this.elementSelector(value);\n            }\n            catch (err) {\n                this.error(err);\n            }\n        }\n        else {\n            element = value;\n        }\n        if (!group) {\n            group = (this.subjectSelector ? this.subjectSelector() : new Subject());\n            groups.set(key, group);\n            const groupedObservable = new GroupedObservable(key, group, this);\n            this.destination.next(groupedObservable);\n            if (this.durationSelector) {\n                let duration;\n                try {\n                    duration = this.durationSelector(new GroupedObservable(key, group));\n                }\n                catch (err) {\n                    this.error(err);\n                    return;\n                }\n                this.add(duration.subscribe(new GroupDurationSubscriber(key, group, this)));\n            }\n        }\n        if (!group.closed) {\n            group.next(element);\n        }\n    }\n    _error(err) {\n        const groups = this.groups;\n        if (groups) {\n            groups.forEach((group, key) => {\n                group.error(err);\n            });\n            groups.clear();\n        }\n        this.destination.error(err);\n    }\n    _complete() {\n        const groups = this.groups;\n        if (groups) {\n            groups.forEach((group, key) => {\n                group.complete();\n            });\n            groups.clear();\n        }\n        this.destination.complete();\n    }\n    removeGroup(key) {\n        this.groups.delete(key);\n    }\n    unsubscribe() {\n        if (!this.closed) {\n            this.attemptedToUnsubscribe = true;\n            if (this.count === 0) {\n                super.unsubscribe();\n            }\n        }\n    }\n}\nclass GroupDurationSubscriber extends Subscriber {\n    constructor(key, group, parent) {\n        super(group);\n        this.key = key;\n        this.group = group;\n        this.parent = parent;\n    }\n    _next(value) {\n        this.complete();\n    }\n    _unsubscribe() {\n        const { parent, key } = this;\n        this.key = this.parent = null;\n        if (parent) {\n            parent.removeGroup(key);\n        }\n    }\n}\nexport class GroupedObservable extends Observable {\n    constructor(key, groupSubject, refCountSubscription) {\n        super();\n        this.key = key;\n        this.groupSubject = groupSubject;\n        this.refCountSubscription = refCountSubscription;\n    }\n    _subscribe(subscriber) {\n        const subscription = new Subscription();\n        const { refCountSubscription, groupSubject } = this;\n        if (refCountSubscription && !refCountSubscription.closed) {\n            subscription.add(new InnerRefCountSubscription(refCountSubscription));\n        }\n        subscription.add(groupSubject.subscribe(subscriber));\n        return subscription;\n    }\n}\nclass InnerRefCountSubscription extends Subscription {\n    constructor(parent) {\n        super();\n        this.parent = parent;\n        parent.count++;\n    }\n    unsubscribe() {\n        const parent = this.parent;\n        if (!parent.closed && !this.closed) {\n            super.unsubscribe();\n            parent.count -= 1;\n            if (parent.count === 0 && parent.attemptedToUnsubscribe) {\n                parent.unsubscribe();\n            }\n        }\n    }\n}\n//# sourceMappingURL=groupBy.js.map","export function applyMixins(derivedCtor, baseCtors) {\n    for (let i = 0, len = baseCtors.length; i < len; i++) {\n        const baseCtor = baseCtors[i];\n        const propertyKeys = Object.getOwnPropertyNames(baseCtor.prototype);\n        for (let j = 0, len2 = propertyKeys.length; j < len2; j++) {\n            const name = propertyKeys[j];\n            derivedCtor.prototype[name] = baseCtor.prototype[name];\n        }\n    }\n}\n//# sourceMappingURL=applyMixins.js.map","import { async } from '../scheduler/async';\nimport { Subscriber } from '../Subscriber';\nimport { isScheduler } from '../util/isScheduler';\nexport function bufferTime(bufferTimeSpan) {\n    let length = arguments.length;\n    let scheduler = async;\n    if (isScheduler(arguments[arguments.length - 1])) {\n        scheduler = arguments[arguments.length - 1];\n        length--;\n    }\n    let bufferCreationInterval = null;\n    if (length >= 2) {\n        bufferCreationInterval = arguments[1];\n    }\n    let maxBufferSize = Number.POSITIVE_INFINITY;\n    if (length >= 3) {\n        maxBufferSize = arguments[2];\n    }\n    return function bufferTimeOperatorFunction(source) {\n        return source.lift(new BufferTimeOperator(bufferTimeSpan, bufferCreationInterval, maxBufferSize, scheduler));\n    };\n}\nclass BufferTimeOperator {\n    constructor(bufferTimeSpan, bufferCreationInterval, maxBufferSize, scheduler) {\n        this.bufferTimeSpan = bufferTimeSpan;\n        this.bufferCreationInterval = bufferCreationInterval;\n        this.maxBufferSize = maxBufferSize;\n        this.scheduler = scheduler;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new BufferTimeSubscriber(subscriber, this.bufferTimeSpan, this.bufferCreationInterval, this.maxBufferSize, this.scheduler));\n    }\n}\nclass Context {\n    constructor() {\n        this.buffer = [];\n    }\n}\nclass BufferTimeSubscriber extends Subscriber {\n    constructor(destination, bufferTimeSpan, bufferCreationInterval, maxBufferSize, scheduler) {\n        super(destination);\n        this.bufferTimeSpan = bufferTimeSpan;\n        this.bufferCreationInterval = bufferCreationInterval;\n        this.maxBufferSize = maxBufferSize;\n        this.scheduler = scheduler;\n        this.contexts = [];\n        const context = this.openContext();\n        this.timespanOnly = bufferCreationInterval == null || bufferCreationInterval < 0;\n        if (this.timespanOnly) {\n            const timeSpanOnlyState = { subscriber: this, context, bufferTimeSpan };\n            this.add(context.closeAction = scheduler.schedule(dispatchBufferTimeSpanOnly, bufferTimeSpan, timeSpanOnlyState));\n        }\n        else {\n            const closeState = { subscriber: this, context };\n            const creationState = { bufferTimeSpan, bufferCreationInterval, subscriber: this, scheduler };\n            this.add(context.closeAction = scheduler.schedule(dispatchBufferClose, bufferTimeSpan, closeState));\n            this.add(scheduler.schedule(dispatchBufferCreation, bufferCreationInterval, creationState));\n        }\n    }\n    _next(value) {\n        const contexts = this.contexts;\n        const len = contexts.length;\n        let filledBufferContext;\n        for (let i = 0; i < len; i++) {\n            const context = contexts[i];\n            const buffer = context.buffer;\n            buffer.push(value);\n            if (buffer.length == this.maxBufferSize) {\n                filledBufferContext = context;\n            }\n        }\n        if (filledBufferContext) {\n            this.onBufferFull(filledBufferContext);\n        }\n    }\n    _error(err) {\n        this.contexts.length = 0;\n        super._error(err);\n    }\n    _complete() {\n        const { contexts, destination } = this;\n        while (contexts.length > 0) {\n            const context = contexts.shift();\n            destination.next(context.buffer);\n        }\n        super._complete();\n    }\n    _unsubscribe() {\n        this.contexts = null;\n    }\n    onBufferFull(context) {\n        this.closeContext(context);\n        const closeAction = context.closeAction;\n        closeAction.unsubscribe();\n        this.remove(closeAction);\n        if (!this.closed && this.timespanOnly) {\n            context = this.openContext();\n            const bufferTimeSpan = this.bufferTimeSpan;\n            const timeSpanOnlyState = { subscriber: this, context, bufferTimeSpan };\n            this.add(context.closeAction = this.scheduler.schedule(dispatchBufferTimeSpanOnly, bufferTimeSpan, timeSpanOnlyState));\n        }\n    }\n    openContext() {\n        const context = new Context();\n        this.contexts.push(context);\n        return context;\n    }\n    closeContext(context) {\n        this.destination.next(context.buffer);\n        const contexts = this.contexts;\n        const spliceIndex = contexts ? contexts.indexOf(context) : -1;\n        if (spliceIndex >= 0) {\n            contexts.splice(contexts.indexOf(context), 1);\n        }\n    }\n}\nfunction dispatchBufferTimeSpanOnly(state) {\n    const subscriber = state.subscriber;\n    const prevContext = state.context;\n    if (prevContext) {\n        subscriber.closeContext(prevContext);\n    }\n    if (!subscriber.closed) {\n        state.context = subscriber.openContext();\n        state.context.closeAction = this.schedule(state, state.bufferTimeSpan);\n    }\n}\nfunction dispatchBufferCreation(state) {\n    const { bufferCreationInterval, bufferTimeSpan, subscriber, scheduler } = state;\n    const context = subscriber.openContext();\n    const action = this;\n    if (!subscriber.closed) {\n        subscriber.add(context.closeAction = scheduler.schedule(dispatchBufferClose, bufferTimeSpan, { subscriber, context }));\n        action.schedule(state, bufferCreationInterval);\n    }\n}\nfunction dispatchBufferClose(arg) {\n    const { subscriber, context } = arg;\n    subscriber.closeContext(context);\n}\n//# sourceMappingURL=bufferTime.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar mergeAll_1 = require(\"../../operator/mergeAll\");\nrxjs_1.Observable.prototype.mergeAll = mergeAll_1.mergeAll;\n//# sourceMappingURL=mergeAll.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Emits the most recently emitted value from the source Observable within\n * periodic time intervals.\n *\n * <span class=\"informal\">Samples the source Observable at periodic time\n * intervals, emitting what it samples.</span>\n *\n * <img src=\"./img/sampleTime.png\" width=\"100%\">\n *\n * `sampleTime` periodically looks at the source Observable and emits whichever\n * value it has most recently emitted since the previous sampling, unless the\n * source has not emitted anything since the previous sampling. The sampling\n * happens periodically in time every `period` milliseconds (or the time unit\n * defined by the optional `scheduler` argument). The sampling starts as soon as\n * the output Observable is subscribed.\n *\n * @example <caption>Every second, emit the most recent click at most once</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.sampleTime(1000);\n * result.subscribe(x => console.log(x));\n *\n * @see {@link auditTime}\n * @see {@link debounceTime}\n * @see {@link delay}\n * @see {@link sample}\n * @see {@link throttleTime}\n *\n * @param {number} period The sampling period expressed in milliseconds or the\n * time unit determined internally by the optional `scheduler`.\n * @param {Scheduler} [scheduler=asyncScheduler] The {@link SchedulerLike} to use for\n * managing the timers that handle the sampling.\n * @return {Observable<T>} An Observable that emits the results of sampling the\n * values emitted by the source Observable at the specified time interval.\n * @method sampleTime\n * @owner Observable\n */\nfunction sampleTime(period, scheduler) {\n    if (scheduler === void 0) { scheduler = rxjs_1.asyncScheduler; }\n    return operators_1.sampleTime(period, scheduler)(this);\n}\nexports.sampleTime = sampleTime;\n//# sourceMappingURL=sampleTime.js.map","function _assertThisInitialized(self) {\n  if (self === void 0) {\n    throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n  }\n\n  return self;\n}\n\nmodule.exports = _assertThisInitialized;","export default function _nonIterableRest() {\n  throw new TypeError(\"Invalid attempt to destructure non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");\n}","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar publishReplay_1 = require(\"../../operator/publishReplay\");\nrxjs_1.Observable.prototype.publishReplay = publishReplay_1.publishReplay;\n//# sourceMappingURL=publishReplay.js.map","import { distinctUntilChanged } from './distinctUntilChanged';\nexport function distinctUntilKeyChanged(key, compare) {\n    return distinctUntilChanged((x, y) => compare ? compare(x[key], y[key]) : x[key] === y[key]);\n}\n//# sourceMappingURL=distinctUntilKeyChanged.js.map","import { Subscription } from '../Subscription';\nimport { SimpleOuterSubscriber, innerSubscribe, SimpleInnerSubscriber } from '../innerSubscribe';\nexport function bufferWhen(closingSelector) {\n    return function (source) {\n        return source.lift(new BufferWhenOperator(closingSelector));\n    };\n}\nclass BufferWhenOperator {\n    constructor(closingSelector) {\n        this.closingSelector = closingSelector;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new BufferWhenSubscriber(subscriber, this.closingSelector));\n    }\n}\nclass BufferWhenSubscriber extends SimpleOuterSubscriber {\n    constructor(destination, closingSelector) {\n        super(destination);\n        this.closingSelector = closingSelector;\n        this.subscribing = false;\n        this.openBuffer();\n    }\n    _next(value) {\n        this.buffer.push(value);\n    }\n    _complete() {\n        const buffer = this.buffer;\n        if (buffer) {\n            this.destination.next(buffer);\n        }\n        super._complete();\n    }\n    _unsubscribe() {\n        this.buffer = undefined;\n        this.subscribing = false;\n    }\n    notifyNext() {\n        this.openBuffer();\n    }\n    notifyComplete() {\n        if (this.subscribing) {\n            this.complete();\n        }\n        else {\n            this.openBuffer();\n        }\n    }\n    openBuffer() {\n        let { closingSubscription } = this;\n        if (closingSubscription) {\n            this.remove(closingSubscription);\n            closingSubscription.unsubscribe();\n        }\n        const buffer = this.buffer;\n        if (this.buffer) {\n            this.destination.next(buffer);\n        }\n        this.buffer = [];\n        let closingNotifier;\n        try {\n            const { closingSelector } = this;\n            closingNotifier = closingSelector();\n        }\n        catch (err) {\n            return this.error(err);\n        }\n        closingSubscription = new Subscription();\n        this.closingSubscription = closingSubscription;\n        this.add(closingSubscription);\n        this.subscribing = true;\n        closingSubscription.add(innerSubscribe(closingNotifier, new SimpleInnerSubscriber(this)));\n        this.subscribing = false;\n    }\n}\n//# sourceMappingURL=bufferWhen.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.bindNodeCallback = rxjs_1.bindNodeCallback;\n//# sourceMappingURL=bindNodeCallback.js.map","import { Observable } from '../Observable';\nimport { async } from '../scheduler/async';\nimport { isNumeric } from '../util/isNumeric';\nimport { isScheduler } from '../util/isScheduler';\nexport function timer(dueTime = 0, periodOrScheduler, scheduler) {\n    let period = -1;\n    if (isNumeric(periodOrScheduler)) {\n        period = Number(periodOrScheduler) < 1 && 1 || Number(periodOrScheduler);\n    }\n    else if (isScheduler(periodOrScheduler)) {\n        scheduler = periodOrScheduler;\n    }\n    if (!isScheduler(scheduler)) {\n        scheduler = async;\n    }\n    return new Observable(subscriber => {\n        const due = isNumeric(dueTime)\n            ? dueTime\n            : (+dueTime - scheduler.now());\n        return scheduler.schedule(dispatch, due, {\n            index: 0, period, subscriber\n        });\n    });\n}\nfunction dispatch(state) {\n    const { index, period, subscriber } = state;\n    subscriber.next(index);\n    if (subscriber.closed) {\n        return;\n    }\n    else if (period === -1) {\n        return subscriber.complete();\n    }\n    state.index = index + 1;\n    this.schedule(state, period);\n}\n//# sourceMappingURL=timer.js.map","import { Immediate } from '../util/Immediate';\nimport { AsyncAction } from './AsyncAction';\nexport class AsapAction extends AsyncAction {\n    constructor(scheduler, work) {\n        super(scheduler, work);\n        this.scheduler = scheduler;\n        this.work = work;\n    }\n    requestAsyncId(scheduler, id, delay = 0) {\n        if (delay !== null && delay > 0) {\n            return super.requestAsyncId(scheduler, id, delay);\n        }\n        scheduler.actions.push(this);\n        return scheduler.scheduled || (scheduler.scheduled = Immediate.setImmediate(scheduler.flush.bind(scheduler, null)));\n    }\n    recycleAsyncId(scheduler, id, delay = 0) {\n        if ((delay !== null && delay > 0) || (delay === null && this.delay > 0)) {\n            return super.recycleAsyncId(scheduler, id, delay);\n        }\n        if (scheduler.actions.length === 0) {\n            Immediate.clearImmediate(id);\n            scheduler.scheduled = undefined;\n        }\n        return undefined;\n    }\n}\n//# sourceMappingURL=AsapAction.js.map","import { observable as Symbol_observable } from '../symbol/observable';\nexport function isInteropObservable(input) {\n    return input && typeof input[Symbol_observable] === 'function';\n}\n//# sourceMappingURL=isInteropObservable.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar scan_1 = require(\"../../operator/scan\");\nrxjs_1.Observable.prototype.scan = scan_1.scan;\n//# sourceMappingURL=scan.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/* tslint:enable:max-line-length */\n/**\n * Applies an accumulator function over the source Observable, and returns the\n * accumulated result when the source completes, given an optional seed value.\n *\n * <span class=\"informal\">Combines together all values emitted on the source,\n * using an accumulator function that knows how to join a new source value into\n * the accumulation from the past.</span>\n *\n * <img src=\"./img/reduce.png\" width=\"100%\">\n *\n * Like\n * [Array.prototype.reduce()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/reduce),\n * `reduce` applies an `accumulator` function against an accumulation and each\n * value of the source Observable (from the past) to reduce it to a single\n * value, emitted on the output Observable. Note that `reduce` will only emit\n * one value, only when the source Observable completes. It is equivalent to\n * applying operator {@link scan} followed by operator {@link last}.\n *\n * Returns an Observable that applies a specified `accumulator` function to each\n * item emitted by the source Observable. If a `seed` value is specified, then\n * that value will be used as the initial value for the accumulator. If no seed\n * value is specified, the first item of the source is used as the seed.\n *\n * @example <caption>Count the number of click events that happened in 5 seconds</caption>\n * var clicksInFiveSeconds = Rx.Observable.fromEvent(document, 'click')\n *   .takeUntil(Rx.Observable.interval(5000));\n * var ones = clicksInFiveSeconds.mapTo(1);\n * var seed = 0;\n * var count = ones.reduce((acc, one) => acc + one, seed);\n * count.subscribe(x => console.log(x));\n *\n * @see {@link count}\n * @see {@link expand}\n * @see {@link mergeScan}\n * @see {@link scan}\n *\n * @param {function(acc: R, value: T, index: number): R} accumulator The accumulator function\n * called on each source value.\n * @param {R} [seed] The initial accumulation value.\n * @return {Observable<R>} An Observable that emits a single value that is the\n * result of accumulating the values emitted by the source Observable.\n * @method reduce\n * @owner Observable\n */\nfunction reduce(accumulator, seed) {\n    // providing a seed of `undefined` *should* be valid and trigger\n    // hasSeed! so don't use `seed !== undefined` checks!\n    // For this reason, we have to check it here at the original call site\n    // otherwise inside Operator/Subscriber we won't know if `undefined`\n    // means they didn't provide anything or if they literally provided `undefined`\n    if (arguments.length >= 2) {\n        return operators_1.reduce(accumulator, seed)(this);\n    }\n    return operators_1.reduce(accumulator)(this);\n}\nexports.reduce = reduce;\n//# sourceMappingURL=reduce.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Emits values emitted by the source Observable so long as each value satisfies\n * the given `predicate`, and then completes as soon as this `predicate` is not\n * satisfied.\n *\n * <span class=\"informal\">Takes values from the source only while they pass the\n * condition given. When the first value does not satisfy, it completes.</span>\n *\n * <img src=\"./img/takeWhile.png\" width=\"100%\">\n *\n * `takeWhile` subscribes and begins mirroring the source Observable. Each value\n * emitted on the source is given to the `predicate` function which returns a\n * boolean, representing a condition to be satisfied by the source values. The\n * output Observable emits the source values until such time as the `predicate`\n * returns false, at which point `takeWhile` stops mirroring the source\n * Observable and completes the output Observable.\n *\n * @example <caption>Emit click events only while the clientX property is greater than 200</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.takeWhile(ev => ev.clientX > 200);\n * result.subscribe(x => console.log(x));\n *\n * @see {@link take}\n * @see {@link takeLast}\n * @see {@link takeUntil}\n * @see {@link skip}\n *\n * @param {function(value: T, index: number): boolean} predicate A function that\n * evaluates a value emitted by the source Observable and returns a boolean.\n * Also takes the (zero-based) index as the second argument.\n * @return {Observable<T>} An Observable that emits the values from the source\n * Observable so long as each value satisfies the condition defined by the\n * `predicate`, then completes.\n * @method takeWhile\n * @owner Observable\n */\nfunction takeWhile(predicate) {\n    return operators_1.takeWhile(predicate)(this);\n}\nexports.takeWhile = takeWhile;\n//# sourceMappingURL=takeWhile.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.throw = rxjs_1.throwError;\nrxjs_1.Observable.throwError = rxjs_1.throwError;\n//# sourceMappingURL=throw.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar materialize_1 = require(\"../../operator/materialize\");\nrxjs_1.Observable.prototype.materialize = materialize_1.materialize;\n//# sourceMappingURL=materialize.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {FocusMonitor} from '@angular/cdk/a11y';\nimport {\n  BooleanInput,\n  coerceBooleanProperty,\n  coerceNumberProperty,\n  NumberInput,\n} from '@angular/cdk/coercion';\nimport {UniqueSelectionDispatcher} from '@angular/cdk/collections';\nimport {\n  AfterContentInit,\n  AfterViewInit,\n  Attribute,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ContentChildren,\n  Directive,\n  ElementRef,\n  EventEmitter,\n  forwardRef,\n  Inject,\n  InjectionToken,\n  Input,\n  OnDestroy,\n  OnInit,\n  Optional,\n  Output,\n  QueryList,\n  ViewChild,\n  ViewEncapsulation,\n} from '@angular/core';\nimport {ControlValueAccessor, NG_VALUE_ACCESSOR} from '@angular/forms';\nimport {\n  CanDisableRipple,\n  CanDisableRippleCtor,\n  HasTabIndex,\n  HasTabIndexCtor,\n  mixinDisableRipple,\n  mixinTabIndex,\n  ThemePalette,\n} from '@angular/material/core';\nimport {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';\n\n\nexport interface MatRadioDefaultOptions {\n  color: ThemePalette;\n}\n\nexport const MAT_RADIO_DEFAULT_OPTIONS =\n  new InjectionToken<MatRadioDefaultOptions>('mat-radio-default-options', {\n  providedIn: 'root',\n  factory: MAT_RADIO_DEFAULT_OPTIONS_FACTORY\n});\n\nexport function MAT_RADIO_DEFAULT_OPTIONS_FACTORY(): MatRadioDefaultOptions {\n  return {\n    color: 'accent'\n  };\n}\n\n// Increasing integer for generating unique ids for radio components.\nlet nextUniqueId = 0;\n\n/**\n * Provider Expression that allows mat-radio-group to register as a ControlValueAccessor. This\n * allows it to support [(ngModel)] and ngControl.\n * @docs-private\n */\nexport const MAT_RADIO_GROUP_CONTROL_VALUE_ACCESSOR: any = {\n  provide: NG_VALUE_ACCESSOR,\n  useExisting: forwardRef(() => MatRadioGroup),\n  multi: true\n};\n\n/** Change event object emitted by MatRadio and MatRadioGroup. */\nexport class MatRadioChange {\n  constructor(\n    /** The MatRadioButton that emits the change event. */\n    public source: _MatRadioButtonBase,\n    /** The value of the MatRadioButton. */\n    public value: any) {}\n}\n\n/**\n * Injection token that can be used to inject instances of `MatRadioGroup`. It serves as\n * alternative token to the actual `MatRadioGroup` class which could cause unnecessary\n * retention of the class and its component metadata.\n */\nexport const MAT_RADIO_GROUP =\n    new InjectionToken<_MatRadioGroupBase<_MatRadioButtonBase>>('MatRadioGroup');\n\n/**\n * Base class with all of the `MatRadioGroup` functionality.\n * @docs-private\n */\n@Directive()\nexport abstract class _MatRadioGroupBase<T extends _MatRadioButtonBase> implements AfterContentInit,\n  ControlValueAccessor {\n  /** Selected value for the radio group. */\n  private _value: any = null;\n\n  /** The HTML name attribute applied to radio buttons in this group. */\n  private _name: string = `mat-radio-group-${nextUniqueId++}`;\n\n  /** The currently selected radio button. Should match value. */\n  private _selected: T | null = null;\n\n  /** Whether the `value` has been set to its initial value. */\n  private _isInitialized: boolean = false;\n\n  /** Whether the labels should appear after or before the radio-buttons. Defaults to 'after' */\n  private _labelPosition: 'before' | 'after' = 'after';\n\n  /** Whether the radio group is disabled. */\n  private _disabled: boolean = false;\n\n  /** Whether the radio group is required. */\n  private _required: boolean = false;\n\n  /** The method to be called in order to update ngModel */\n  _controlValueAccessorChangeFn: (value: any) => void = () => {};\n\n  /**\n   * onTouch function registered via registerOnTouch (ControlValueAccessor).\n   * @docs-private\n   */\n  onTouched: () => any = () => {};\n\n  /**\n   * Event emitted when the group value changes.\n   * Change events are only emitted when the value changes due to user interaction with\n   * a radio button (the same behavior as `<input type-\"radio\">`).\n   */\n  @Output() readonly change: EventEmitter<MatRadioChange> = new EventEmitter<MatRadioChange>();\n\n  /** Child radio buttons. */\n  abstract _radios: QueryList<T>;\n\n  /** Theme color for all of the radio buttons in the group. */\n  @Input() color: ThemePalette;\n\n  /** Name of the radio button group. All radio buttons inside this group will use this name. */\n  @Input()\n  get name(): string { return this._name; }\n  set name(value: string) {\n    this._name = value;\n    this._updateRadioButtonNames();\n  }\n\n  /** Whether the labels should appear after or before the radio-buttons. Defaults to 'after' */\n  @Input()\n  get labelPosition(): 'before' | 'after' {\n    return this._labelPosition;\n  }\n  set labelPosition(v) {\n    this._labelPosition = v === 'before' ? 'before' : 'after';\n    this._markRadiosForCheck();\n  }\n\n  /**\n   * Value for the radio-group. Should equal the value of the selected radio button if there is\n   * a corresponding radio button with a matching value. If there is not such a corresponding\n   * radio button, this value persists to be applied in case a new radio button is added with a\n   * matching value.\n   */\n  @Input()\n  get value(): any { return this._value; }\n  set value(newValue: any) {\n    if (this._value !== newValue) {\n      // Set this before proceeding to ensure no circular loop occurs with selection.\n      this._value = newValue;\n\n      this._updateSelectedRadioFromValue();\n      this._checkSelectedRadioButton();\n    }\n  }\n\n  _checkSelectedRadioButton() {\n    if (this._selected && !this._selected.checked) {\n      this._selected.checked = true;\n    }\n  }\n\n  /**\n   * The currently selected radio button. If set to a new radio button, the radio group value\n   * will be updated to match the new selected button.\n   */\n  @Input()\n  get selected() { return this._selected; }\n  set selected(selected: T | null) {\n    this._selected = selected;\n    this.value = selected ? selected.value : null;\n    this._checkSelectedRadioButton();\n  }\n\n  /** Whether the radio group is disabled */\n  @Input()\n  get disabled(): boolean { return this._disabled; }\n  set disabled(value) {\n    this._disabled = coerceBooleanProperty(value);\n    this._markRadiosForCheck();\n  }\n\n  /** Whether the radio group is required */\n  @Input()\n  get required(): boolean { return this._required; }\n  set required(value: boolean) {\n    this._required = coerceBooleanProperty(value);\n    this._markRadiosForCheck();\n  }\n\n  constructor(private _changeDetector: ChangeDetectorRef) { }\n\n  /**\n   * Initialize properties once content children are available.\n   * This allows us to propagate relevant attributes to associated buttons.\n   */\n  ngAfterContentInit() {\n    // Mark this component as initialized in AfterContentInit because the initial value can\n    // possibly be set by NgModel on MatRadioGroup, and it is possible that the OnInit of the\n    // NgModel occurs *after* the OnInit of the MatRadioGroup.\n    this._isInitialized = true;\n  }\n\n  /**\n   * Mark this group as being \"touched\" (for ngModel). Meant to be called by the contained\n   * radio buttons upon their blur.\n   */\n  _touch() {\n    if (this.onTouched) {\n      this.onTouched();\n    }\n  }\n\n  private _updateRadioButtonNames(): void {\n    if (this._radios) {\n      this._radios.forEach(radio => {\n        radio.name = this.name;\n        radio._markForCheck();\n      });\n    }\n  }\n\n  /** Updates the `selected` radio button from the internal _value state. */\n  private _updateSelectedRadioFromValue(): void {\n    // If the value already matches the selected radio, do nothing.\n    const isAlreadySelected = this._selected !== null && this._selected.value === this._value;\n\n    if (this._radios && !isAlreadySelected) {\n      this._selected = null;\n      this._radios.forEach(radio => {\n        radio.checked = this.value === radio.value;\n        if (radio.checked) {\n          this._selected = radio;\n        }\n      });\n    }\n  }\n\n  /** Dispatch change event with current selection and group value. */\n  _emitChangeEvent(): void {\n    if (this._isInitialized) {\n      this.change.emit(new MatRadioChange(this._selected!, this._value));\n    }\n  }\n\n  _markRadiosForCheck() {\n    if (this._radios) {\n      this._radios.forEach(radio => radio._markForCheck());\n    }\n  }\n\n  /**\n   * Sets the model value. Implemented as part of ControlValueAccessor.\n   * @param value\n   */\n  writeValue(value: any) {\n    this.value = value;\n    this._changeDetector.markForCheck();\n  }\n\n  /**\n   * Registers a callback to be triggered when the model value changes.\n   * Implemented as part of ControlValueAccessor.\n   * @param fn Callback to be registered.\n   */\n  registerOnChange(fn: (value: any) => void) {\n    this._controlValueAccessorChangeFn = fn;\n  }\n\n  /**\n   * Registers a callback to be triggered when the control is touched.\n   * Implemented as part of ControlValueAccessor.\n   * @param fn Callback to be registered.\n   */\n  registerOnTouched(fn: any) {\n    this.onTouched = fn;\n  }\n\n  /**\n   * Sets the disabled state of the control. Implemented as a part of ControlValueAccessor.\n   * @param isDisabled Whether the control should be disabled.\n   */\n  setDisabledState(isDisabled: boolean) {\n    this.disabled = isDisabled;\n    this._changeDetector.markForCheck();\n  }\n\n  static ngAcceptInputType_disabled: BooleanInput;\n  static ngAcceptInputType_required: BooleanInput;\n}\n\n/**\n * A group of radio buttons. May contain one or more `<mat-radio-button>` elements.\n */\n@Directive({\n  selector: 'mat-radio-group',\n  exportAs: 'matRadioGroup',\n  providers: [\n    MAT_RADIO_GROUP_CONTROL_VALUE_ACCESSOR,\n    {provide: MAT_RADIO_GROUP, useExisting: MatRadioGroup},\n  ],\n  host: {\n    'role': 'radiogroup',\n    'class': 'mat-radio-group',\n  },\n})\nexport class MatRadioGroup extends _MatRadioGroupBase<MatRadioButton> {\n  @ContentChildren(forwardRef(() => MatRadioButton), {descendants: true})\n  _radios: QueryList<MatRadioButton>;\n}\n\n// Boilerplate for applying mixins to MatRadioButton.\n/** @docs-private */\nabstract class MatRadioButtonBase {\n  // Since the disabled property is manually defined for the MatRadioButton and isn't set up in\n  // the mixin base class. To be able to use the tabindex mixin, a disabled property must be\n  // defined to properly work.\n  abstract disabled: boolean;\n  constructor(public _elementRef: ElementRef) {}\n}\n// As per Material design specifications the selection control radio should use the accent color\n// palette by default. https://material.io/guidelines/components/selection-controls.html\nconst _MatRadioButtonMixinBase:\n    CanDisableRippleCtor & HasTabIndexCtor & typeof MatRadioButtonBase =\n        mixinDisableRipple(mixinTabIndex(MatRadioButtonBase));\n\n/**\n * Base class with all of the `MatRadioButton` functionality.\n * @docs-private\n */\n@Directive()\nexport abstract class _MatRadioButtonBase extends _MatRadioButtonMixinBase implements OnInit,\n  AfterViewInit, OnDestroy, CanDisableRipple, HasTabIndex {\n\n  private _uniqueId: string = `mat-radio-${++nextUniqueId}`;\n\n  /** The unique ID for the radio button. */\n  @Input() id: string = this._uniqueId;\n\n  /** Analog to HTML 'name' attribute used to group radios for unique selection. */\n  @Input() name: string;\n\n  /** Used to set the 'aria-label' attribute on the underlying input element. */\n  @Input('aria-label') ariaLabel: string;\n\n  /** The 'aria-labelledby' attribute takes precedence as the element's text alternative. */\n  @Input('aria-labelledby') ariaLabelledby: string;\n\n  /** The 'aria-describedby' attribute is read after the element's label and field type. */\n  @Input('aria-describedby') ariaDescribedby: string;\n\n  /** Whether this radio button is checked. */\n  @Input()\n  get checked(): boolean { return this._checked; }\n  set checked(value: boolean) {\n    const newCheckedState = coerceBooleanProperty(value);\n    if (this._checked !== newCheckedState) {\n      this._checked = newCheckedState;\n      if (newCheckedState && this.radioGroup && this.radioGroup.value !== this.value) {\n        this.radioGroup.selected = this;\n      } else if (!newCheckedState && this.radioGroup && this.radioGroup.value === this.value) {\n\n        // When unchecking the selected radio button, update the selected radio\n        // property on the group.\n        this.radioGroup.selected = null;\n      }\n\n      if (newCheckedState) {\n        // Notify all radio buttons with the same name to un-check.\n        this._radioDispatcher.notify(this.id, this.name);\n      }\n      this._changeDetector.markForCheck();\n    }\n  }\n\n  /** The value of this radio button. */\n  @Input()\n  get value(): any { return this._value; }\n  set value(value: any) {\n    if (this._value !== value) {\n      this._value = value;\n      if (this.radioGroup !== null) {\n        if (!this.checked) {\n          // Update checked when the value changed to match the radio group's value\n          this.checked = this.radioGroup.value === value;\n        }\n        if (this.checked) {\n          this.radioGroup.selected = this;\n        }\n      }\n    }\n  }\n\n  /** Whether the label should appear after or before the radio button. Defaults to 'after' */\n  @Input()\n  get labelPosition(): 'before' | 'after' {\n    return this._labelPosition || (this.radioGroup && this.radioGroup.labelPosition) || 'after';\n  }\n  set labelPosition(value) {\n    this._labelPosition = value;\n  }\n  private _labelPosition: 'before' | 'after';\n\n  /** Whether the radio button is disabled. */\n  @Input()\n  get disabled(): boolean {\n    return this._disabled || (this.radioGroup !== null && this.radioGroup.disabled);\n  }\n  set disabled(value: boolean) {\n    this._setDisabled(coerceBooleanProperty(value));\n  }\n\n  /** Whether the radio button is required. */\n  @Input()\n  get required(): boolean {\n    return this._required || (this.radioGroup && this.radioGroup.required);\n  }\n  set required(value: boolean) {\n    this._required = coerceBooleanProperty(value);\n  }\n\n  /** Theme color of the radio button. */\n  @Input()\n  get color(): ThemePalette {\n    return this._color ||\n      (this.radioGroup && this.radioGroup.color) ||\n      this._providerOverride && this._providerOverride.color || 'accent';\n  }\n  set color(newValue: ThemePalette) { this._color = newValue; }\n  private _color: ThemePalette;\n\n  /**\n   * Event emitted when the checked state of this radio button changes.\n   * Change events are only emitted when the value changes due to user interaction with\n   * the radio button (the same behavior as `<input type-\"radio\">`).\n   */\n  @Output() readonly change: EventEmitter<MatRadioChange> = new EventEmitter<MatRadioChange>();\n\n  /** The parent radio group. May or may not be present. */\n  radioGroup: _MatRadioGroupBase<_MatRadioButtonBase>;\n\n  /** ID of the native input element inside `<mat-radio-button>` */\n  get inputId(): string { return `${this.id || this._uniqueId}-input`; }\n\n  /** Whether this radio is checked. */\n  private _checked: boolean = false;\n\n  /** Whether this radio is disabled. */\n  private _disabled: boolean;\n\n  /** Whether this radio is required. */\n  private _required: boolean;\n\n  /** Value assigned to this radio. */\n  private _value: any = null;\n\n  /** Unregister function for _radioDispatcher */\n  private _removeUniqueSelectionListener: () => void = () => {};\n\n  /** The native `<input type=radio>` element */\n  @ViewChild('input') _inputElement: ElementRef<HTMLInputElement>;\n\n  constructor(radioGroup: _MatRadioGroupBase<_MatRadioButtonBase>,\n              elementRef: ElementRef,\n              protected _changeDetector: ChangeDetectorRef,\n              private _focusMonitor: FocusMonitor,\n              private _radioDispatcher: UniqueSelectionDispatcher,\n              public _animationMode?: string,\n              private _providerOverride?: MatRadioDefaultOptions,\n              tabIndex?: string) {\n    super(elementRef);\n\n    // Assertions. Ideally these should be stripped out by the compiler.\n    // TODO(jelbourn): Assert that there's no name binding AND a parent radio group.\n    this.radioGroup = radioGroup;\n\n    if (tabIndex) {\n      this.tabIndex = coerceNumberProperty(tabIndex, 0);\n    }\n\n    this._removeUniqueSelectionListener =\n      _radioDispatcher.listen((id: string, name: string) => {\n        if (id !== this.id && name === this.name) {\n          this.checked = false;\n        }\n      });\n  }\n\n  /** Focuses the radio button. */\n  focus(options?: FocusOptions): void {\n    this._focusMonitor.focusVia(this._inputElement, 'keyboard', options);\n  }\n\n  /**\n   * Marks the radio button as needing checking for change detection.\n   * This method is exposed because the parent radio group will directly\n   * update bound properties of the radio button.\n   */\n  _markForCheck() {\n    // When group value changes, the button will not be notified. Use `markForCheck` to explicit\n    // update radio button's status\n    this._changeDetector.markForCheck();\n  }\n\n  ngOnInit() {\n    if (this.radioGroup) {\n      // If the radio is inside a radio group, determine if it should be checked\n      this.checked = this.radioGroup.value === this._value;\n      // Copy name from parent radio group\n      this.name = this.radioGroup.name;\n    }\n  }\n\n  ngAfterViewInit() {\n    this._focusMonitor\n      .monitor(this._elementRef, true)\n      .subscribe(focusOrigin => {\n        if (!focusOrigin && this.radioGroup) {\n          this.radioGroup._touch();\n        }\n      });\n  }\n\n  ngOnDestroy() {\n    this._focusMonitor.stopMonitoring(this._elementRef);\n    this._removeUniqueSelectionListener();\n  }\n\n  /** Dispatch change event with current value. */\n  private _emitChangeEvent(): void {\n    this.change.emit(new MatRadioChange(this, this._value));\n  }\n\n  _isRippleDisabled() {\n    return this.disableRipple || this.disabled;\n  }\n\n  _onInputClick(event: Event) {\n    // We have to stop propagation for click events on the visual hidden input element.\n    // By default, when a user clicks on a label element, a generated click event will be\n    // dispatched on the associated input element. Since we are using a label element as our\n    // root container, the click event on the `radio-button` will be executed twice.\n    // The real click event will bubble up, and the generated click event also tries to bubble up.\n    // This will lead to multiple click events.\n    // Preventing bubbling for the second event will solve that issue.\n    event.stopPropagation();\n  }\n\n  /**\n   * Triggered when the radio button received a click or the input recognized any change.\n   * Clicking on a label element, will trigger a change event on the associated input.\n   */\n  _onInputChange(event: Event) {\n    // We always have to stop propagation on the change event.\n    // Otherwise the change event, from the input element, will bubble up and\n    // emit its event object to the `change` output.\n    event.stopPropagation();\n\n    const groupValueChanged = this.radioGroup && this.value !== this.radioGroup.value;\n    this.checked = true;\n    this._emitChangeEvent();\n\n    if (this.radioGroup) {\n      this.radioGroup._controlValueAccessorChangeFn(this.value);\n      if (groupValueChanged) {\n        this.radioGroup._emitChangeEvent();\n      }\n    }\n  }\n\n  /** Sets the disabled state and marks for check if a change occurred. */\n  protected _setDisabled(value: boolean) {\n    if (this._disabled !== value) {\n      this._disabled = value;\n      this._changeDetector.markForCheck();\n    }\n  }\n\n  static ngAcceptInputType_checked: BooleanInput;\n  static ngAcceptInputType_disabled: BooleanInput;\n  static ngAcceptInputType_required: BooleanInput;\n  static ngAcceptInputType_disableRipple: BooleanInput;\n  static ngAcceptInputType_tabIndex: NumberInput;\n}\n\n\n/**\n * A Material design radio-button. Typically placed inside of `<mat-radio-group>` elements.\n */\n@Component({\n  selector: 'mat-radio-button',\n  templateUrl: 'radio.html',\n  styleUrls: ['radio.css'],\n  inputs: ['disableRipple', 'tabIndex'],\n  encapsulation: ViewEncapsulation.None,\n  exportAs: 'matRadioButton',\n  host: {\n    'class': 'mat-radio-button',\n    '[class.mat-radio-checked]': 'checked',\n    '[class.mat-radio-disabled]': 'disabled',\n    '[class._mat-animation-noopable]': '_animationMode === \"NoopAnimations\"',\n    '[class.mat-primary]': 'color === \"primary\"',\n    '[class.mat-accent]': 'color === \"accent\"',\n    '[class.mat-warn]': 'color === \"warn\"',\n    // Needs to be -1 so the `focus` event still fires.\n    '[attr.tabindex]': '-1',\n    '[attr.id]': 'id',\n    '[attr.aria-label]': 'null',\n    '[attr.aria-labelledby]': 'null',\n    '[attr.aria-describedby]': 'null',\n    // Note: under normal conditions focus shouldn't land on this element, however it may be\n    // programmatically set, for example inside of a focus trap, in this case we want to forward\n    // the focus to the native element.\n    '(focus)': '_inputElement.nativeElement.focus()',\n  },\n  changeDetection: ChangeDetectionStrategy.OnPush,\n})\nexport class MatRadioButton extends _MatRadioButtonBase {\n  constructor(@Optional() @Inject(MAT_RADIO_GROUP) radioGroup: MatRadioGroup,\n              elementRef: ElementRef,\n              changeDetector: ChangeDetectorRef,\n              focusMonitor: FocusMonitor,\n              radioDispatcher: UniqueSelectionDispatcher,\n              @Optional() @Inject(ANIMATION_MODULE_TYPE) animationMode?: string,\n                @Optional() @Inject(MAT_RADIO_DEFAULT_OPTIONS)\n                  providerOverride?: MatRadioDefaultOptions,\n              @Attribute('tabindex') tabIndex?: string) {\n    super(radioGroup, elementRef, changeDetector, focusMonitor, radioDispatcher,\n          animationMode, providerOverride, tabIndex);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgModule} from '@angular/core';\nimport {MatCommonModule, MatRippleModule} from '@angular/material/core';\nimport {MatRadioButton, MatRadioGroup} from './radio';\n\n\n@NgModule({\n  imports: [MatRippleModule, MatCommonModule],\n  exports: [MatRadioGroup, MatRadioButton, MatCommonModule],\n  declarations: [MatRadioGroup, MatRadioButton],\n})\nexport class MatRadioModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './radio-module';\nexport * from './radio';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","import { Observable } from '../Observable';\nimport { from } from './from';\nimport { EMPTY } from './empty';\nexport function using(resourceFactory, observableFactory) {\n    return new Observable(subscriber => {\n        let resource;\n        try {\n            resource = resourceFactory();\n        }\n        catch (err) {\n            subscriber.error(err);\n            return undefined;\n        }\n        let result;\n        try {\n            result = observableFactory(resource);\n        }\n        catch (err) {\n            subscriber.error(err);\n            return undefined;\n        }\n        const source = result ? from(result) : EMPTY;\n        const subscription = source.subscribe(subscriber);\n        return () => {\n            subscription.unsubscribe();\n            if (resource) {\n                resource.unsubscribe();\n            }\n        };\n    });\n}\n//# sourceMappingURL=using.js.map","import { Observable } from '../Observable';\nimport { AsyncSubject } from '../AsyncSubject';\nimport { map } from '../operators/map';\nimport { canReportError } from '../util/canReportError';\nimport { isArray } from '../util/isArray';\nimport { isScheduler } from '../util/isScheduler';\nexport function bindCallback(callbackFunc, resultSelector, scheduler) {\n    if (resultSelector) {\n        if (isScheduler(resultSelector)) {\n            scheduler = resultSelector;\n        }\n        else {\n            return (...args) => bindCallback(callbackFunc, scheduler)(...args).pipe(map((args) => isArray(args) ? resultSelector(...args) : resultSelector(args)));\n        }\n    }\n    return function (...args) {\n        const context = this;\n        let subject;\n        const params = {\n            context,\n            subject,\n            callbackFunc,\n            scheduler,\n        };\n        return new Observable(subscriber => {\n            if (!scheduler) {\n                if (!subject) {\n                    subject = new AsyncSubject();\n                    const handler = (...innerArgs) => {\n                        subject.next(innerArgs.length <= 1 ? innerArgs[0] : innerArgs);\n                        subject.complete();\n                    };\n                    try {\n                        callbackFunc.apply(context, [...args, handler]);\n                    }\n                    catch (err) {\n                        if (canReportError(subject)) {\n                            subject.error(err);\n                        }\n                        else {\n                            console.warn(err);\n                        }\n                    }\n                }\n                return subject.subscribe(subscriber);\n            }\n            else {\n                const state = {\n                    args, subscriber, params,\n                };\n                return scheduler.schedule(dispatch, 0, state);\n            }\n        });\n    };\n}\nfunction dispatch(state) {\n    const self = this;\n    const { args, subscriber, params } = state;\n    const { callbackFunc, context, scheduler } = params;\n    let { subject } = params;\n    if (!subject) {\n        subject = params.subject = new AsyncSubject();\n        const handler = (...innerArgs) => {\n            const value = innerArgs.length <= 1 ? innerArgs[0] : innerArgs;\n            this.add(scheduler.schedule(dispatchNext, 0, { value, subject }));\n        };\n        try {\n            callbackFunc.apply(context, [...args, handler]);\n        }\n        catch (err) {\n            subject.error(err);\n        }\n    }\n    this.add(subject.subscribe(subscriber));\n}\nfunction dispatchNext(state) {\n    const { value, subject } = state;\n    subject.next(value);\n    subject.complete();\n}\nfunction dispatchError(state) {\n    const { err, subject } = state;\n    subject.error(err);\n}\n//# sourceMappingURL=bindCallback.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/* tslint:enable:max-line-length */\n/**\n * Combines the source Observable with other Observables to create an Observable\n * whose values are calculated from the latest values of each, only when the\n * source emits.\n *\n * <span class=\"informal\">Whenever the source Observable emits a value, it\n * computes a formula using that value plus the latest values from other input\n * Observables, then emits the output of that formula.</span>\n *\n * <img src=\"./img/withLatestFrom.png\" width=\"100%\">\n *\n * `withLatestFrom` combines each value from the source Observable (the\n * instance) with the latest values from the other input Observables only when\n * the source emits a value, optionally using a `project` function to determine\n * the value to be emitted on the output Observable. All input Observables must\n * emit at least one value before the output Observable will emit a value.\n *\n * @example <caption>On every click event, emit an array with the latest timer event plus the click event</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var timer = Rx.Observable.interval(1000);\n * var result = clicks.withLatestFrom(timer);\n * result.subscribe(x => console.log(x));\n *\n * @see {@link combineLatest}\n *\n * @param {ObservableInput} other An input Observable to combine with the source\n * Observable. More than one input Observables may be given as argument.\n * @param {Function} [project] Projection function for combining values\n * together. Receives all values in order of the Observables passed, where the\n * first parameter is a value from the source Observable. (e.g.\n * `a.withLatestFrom(b, c, (a1, b1, c1) => a1 + b1 + c1)`). If this is not\n * passed, arrays will be emitted on the output Observable.\n * @return {Observable} An Observable of projected values from the most recent\n * values from each input Observable, or an array of the most recent values from\n * each input Observable.\n * @method withLatestFrom\n * @owner Observable\n */\nfunction withLatestFrom() {\n    var args = [];\n    for (var _i = 0; _i < arguments.length; _i++) {\n        args[_i] = arguments[_i];\n    }\n    return operators_1.withLatestFrom.apply(void 0, args)(this);\n}\nexports.withLatestFrom = withLatestFrom;\n//# sourceMappingURL=withLatestFrom.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar debounceTime_1 = require(\"../../operator/debounceTime\");\nrxjs_1.Observable.prototype.debounceTime = debounceTime_1.debounceTime;\n//# sourceMappingURL=debounceTime.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {\n  animate,\n  AnimationTriggerMetadata,\n  keyframes,\n  state,\n  style,\n  transition,\n  trigger,\n} from '@angular/animations';\n\n/**\n * Animations used by MatTooltip.\n * @docs-private\n */\nexport const matTooltipAnimations: {\n  readonly tooltipState: AnimationTriggerMetadata;\n} = {\n  /** Animation that transitions a tooltip in and out. */\n  tooltipState: trigger('state', [\n    state('initial, void, hidden', style({opacity: 0, transform: 'scale(0)'})),\n    state('visible', style({transform: 'scale(1)'})),\n    transition('* => visible', animate('200ms cubic-bezier(0, 0, 0.2, 1)', keyframes([\n      style({opacity: 0, transform: 'scale(0)', offset: 0}),\n      style({opacity: 0.5, transform: 'scale(0.99)', offset: 0.5}),\n      style({opacity: 1, transform: 'scale(1)', offset: 1})\n    ]))),\n    transition('* => hidden', animate('100ms cubic-bezier(0, 0, 0.2, 1)', style({opacity: 0}))),\n  ])\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {AnimationEvent} from '@angular/animations';\nimport {AriaDescriber, FocusMonitor} from '@angular/cdk/a11y';\nimport {Directionality} from '@angular/cdk/bidi';\nimport {BooleanInput, coerceBooleanProperty, NumberInput} from '@angular/cdk/coercion';\nimport {ESCAPE, hasModifierKey} from '@angular/cdk/keycodes';\nimport {BreakpointObserver, Breakpoints, BreakpointState} from '@angular/cdk/layout';\nimport {\n  FlexibleConnectedPositionStrategy,\n  HorizontalConnectionPos,\n  OriginConnectionPosition,\n  Overlay,\n  OverlayConnectionPosition,\n  OverlayRef,\n  ScrollStrategy,\n  VerticalConnectionPos,\n} from '@angular/cdk/overlay';\nimport {Platform, normalizePassiveListenerOptions} from '@angular/cdk/platform';\nimport {ComponentPortal} from '@angular/cdk/portal';\nimport {ScrollDispatcher} from '@angular/cdk/scrolling';\nimport {\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  Directive,\n  ElementRef,\n  Inject,\n  InjectionToken,\n  Input,\n  NgZone,\n  OnDestroy,\n  Optional,\n  ViewContainerRef,\n  ViewEncapsulation,\n  AfterViewInit,\n} from '@angular/core';\nimport {Observable, Subject} from 'rxjs';\nimport {take, takeUntil} from 'rxjs/operators';\n\nimport {matTooltipAnimations} from './tooltip-animations';\n\n\n/** Possible positions for a tooltip. */\nexport type TooltipPosition = 'left' | 'right' | 'above' | 'below' | 'before' | 'after';\n\n/**\n * Options for how the tooltip trigger should handle touch gestures.\n * See `MatTooltip.touchGestures` for more information.\n */\nexport type TooltipTouchGestures = 'auto' | 'on' | 'off';\n\n/** Possible visibility states of a tooltip. */\nexport type TooltipVisibility = 'initial' | 'visible' | 'hidden';\n\n/** Time in ms to throttle repositioning after scroll events. */\nexport const SCROLL_THROTTLE_MS = 20;\n\n/** CSS class that will be attached to the overlay panel. */\nexport const TOOLTIP_PANEL_CLASS = 'mat-tooltip-panel';\n\n/** Options used to bind passive event listeners. */\nconst passiveListenerOptions = normalizePassiveListenerOptions({passive: true});\n\n/**\n * Time between the user putting the pointer on a tooltip\n * trigger and the long press event being fired.\n */\nconst LONGPRESS_DELAY = 500;\n\n/**\n * Creates an error to be thrown if the user supplied an invalid tooltip position.\n * @docs-private\n */\nexport function getMatTooltipInvalidPositionError(position: string) {\n  return Error(`Tooltip position \"${position}\" is invalid.`);\n}\n\n/** Injection token that determines the scroll handling while a tooltip is visible. */\nexport const MAT_TOOLTIP_SCROLL_STRATEGY =\n    new InjectionToken<() => ScrollStrategy>('mat-tooltip-scroll-strategy');\n\n/** @docs-private */\nexport function MAT_TOOLTIP_SCROLL_STRATEGY_FACTORY(overlay: Overlay): () => ScrollStrategy {\n  return () => overlay.scrollStrategies.reposition({scrollThrottle: SCROLL_THROTTLE_MS});\n}\n\n/** @docs-private */\nexport const MAT_TOOLTIP_SCROLL_STRATEGY_FACTORY_PROVIDER = {\n  provide: MAT_TOOLTIP_SCROLL_STRATEGY,\n  deps: [Overlay],\n  useFactory: MAT_TOOLTIP_SCROLL_STRATEGY_FACTORY,\n};\n\n/** Default `matTooltip` options that can be overridden. */\nexport interface MatTooltipDefaultOptions {\n  showDelay: number;\n  hideDelay: number;\n  touchendHideDelay: number;\n  touchGestures?: TooltipTouchGestures;\n  position?: TooltipPosition;\n}\n\n/** Injection token to be used to override the default options for `matTooltip`. */\nexport const MAT_TOOLTIP_DEFAULT_OPTIONS =\n    new InjectionToken<MatTooltipDefaultOptions>('mat-tooltip-default-options', {\n      providedIn: 'root',\n      factory: MAT_TOOLTIP_DEFAULT_OPTIONS_FACTORY\n    });\n\n/** @docs-private */\nexport function MAT_TOOLTIP_DEFAULT_OPTIONS_FACTORY(): MatTooltipDefaultOptions {\n  return {\n    showDelay: 0,\n    hideDelay: 0,\n    touchendHideDelay: 1500,\n  };\n}\n\n/**\n * Directive that attaches a material design tooltip to the host element. Animates the showing and\n * hiding of a tooltip provided position (defaults to below the element).\n *\n * https://material.io/design/components/tooltips.html\n */\n@Directive({\n  selector: '[matTooltip]',\n  exportAs: 'matTooltip',\n  host: {\n    'class': 'mat-tooltip-trigger'\n  }\n})\nexport class MatTooltip implements OnDestroy, AfterViewInit {\n  _overlayRef: OverlayRef | null;\n  _tooltipInstance: TooltipComponent | null;\n\n  private _portal: ComponentPortal<TooltipComponent>;\n  private _position: TooltipPosition = 'below';\n  private _disabled: boolean = false;\n  private _tooltipClass: string|string[]|Set<string>|{[key: string]: any};\n  private _scrollStrategy: () => ScrollStrategy;\n  private _viewInitialized = false;\n  private _pointerExitEventsInitialized = false;\n\n  /** Allows the user to define the position of the tooltip relative to the parent element */\n  @Input('matTooltipPosition')\n  get position(): TooltipPosition { return this._position; }\n  set position(value: TooltipPosition) {\n    if (value !== this._position) {\n      this._position = value;\n\n      if (this._overlayRef) {\n        this._updatePosition();\n\n        if (this._tooltipInstance) {\n          this._tooltipInstance!.show(0);\n        }\n\n        this._overlayRef.updatePosition();\n      }\n    }\n  }\n\n  /** Disables the display of the tooltip. */\n  @Input('matTooltipDisabled')\n  get disabled(): boolean { return this._disabled; }\n  set disabled(value) {\n    this._disabled = coerceBooleanProperty(value);\n\n    // If tooltip is disabled, hide immediately.\n    if (this._disabled) {\n      this.hide(0);\n    } else {\n      this._setupPointerEnterEventsIfNeeded();\n    }\n  }\n\n  /** The default delay in ms before showing the tooltip after show is called */\n  @Input('matTooltipShowDelay') showDelay: number = this._defaultOptions.showDelay;\n\n  /** The default delay in ms before hiding the tooltip after hide is called */\n  @Input('matTooltipHideDelay') hideDelay: number = this._defaultOptions.hideDelay;\n\n  /**\n   * How touch gestures should be handled by the tooltip. On touch devices the tooltip directive\n   * uses a long press gesture to show and hide, however it can conflict with the native browser\n   * gestures. To work around the conflict, Angular Material disables native gestures on the\n   * trigger, but that might not be desirable on particular elements (e.g. inputs and draggable\n   * elements). The different values for this option configure the touch event handling as follows:\n   * - `auto` - Enables touch gestures for all elements, but tries to avoid conflicts with native\n   *   browser gestures on particular elements. In particular, it allows text selection on inputs\n   *   and textareas, and preserves the native browser dragging on elements marked as `draggable`.\n   * - `on` - Enables touch gestures for all elements and disables native\n   *   browser gestures with no exceptions.\n   * - `off` - Disables touch gestures. Note that this will prevent the tooltip from\n   *   showing on touch devices.\n   */\n  @Input('matTooltipTouchGestures') touchGestures: TooltipTouchGestures = 'auto';\n\n  /** The message to be displayed in the tooltip */\n  @Input('matTooltip')\n  get message() { return this._message; }\n  set message(value: string) {\n    this._ariaDescriber.removeDescription(this._elementRef.nativeElement, this._message);\n\n    // If the message is not a string (e.g. number), convert it to a string and trim it.\n    this._message = value != null ? `${value}`.trim() : '';\n\n    if (!this._message && this._isTooltipVisible()) {\n      this.hide(0);\n    } else {\n      this._setupPointerEnterEventsIfNeeded();\n      this._updateTooltipMessage();\n      this._ngZone.runOutsideAngular(() => {\n        // The `AriaDescriber` has some functionality that avoids adding a description if it's the\n        // same as the `aria-label` of an element, however we can't know whether the tooltip trigger\n        // has a data-bound `aria-label` or when it'll be set for the first time. We can avoid the\n        // issue by deferring the description by a tick so Angular has time to set the `aria-label`.\n        Promise.resolve().then(() => {\n          this._ariaDescriber.describe(this._elementRef.nativeElement, this.message);\n        });\n      });\n    }\n  }\n  private _message = '';\n\n  /** Classes to be passed to the tooltip. Supports the same syntax as `ngClass`. */\n  @Input('matTooltipClass')\n  get tooltipClass() { return this._tooltipClass; }\n  set tooltipClass(value: string|string[]|Set<string>|{[key: string]: any}) {\n    this._tooltipClass = value;\n    if (this._tooltipInstance) {\n      this._setTooltipClass(this._tooltipClass);\n    }\n  }\n\n  /** Manually-bound passive event listeners. */\n  private readonly _passiveListeners:\n      (readonly [string, EventListenerOrEventListenerObject])[] = [];\n\n  /** Timer started at the last `touchstart` event. */\n  private _touchstartTimeout: number;\n\n  /** Emits when the component is destroyed. */\n  private readonly _destroyed = new Subject<void>();\n\n  constructor(\n    private _overlay: Overlay,\n    private _elementRef: ElementRef<HTMLElement>,\n    private _scrollDispatcher: ScrollDispatcher,\n    private _viewContainerRef: ViewContainerRef,\n    private _ngZone: NgZone,\n    private _platform: Platform,\n    private _ariaDescriber: AriaDescriber,\n    private _focusMonitor: FocusMonitor,\n    @Inject(MAT_TOOLTIP_SCROLL_STRATEGY) scrollStrategy: any,\n    @Optional() private _dir: Directionality,\n    @Optional() @Inject(MAT_TOOLTIP_DEFAULT_OPTIONS)\n      private _defaultOptions: MatTooltipDefaultOptions) {\n\n    this._scrollStrategy = scrollStrategy;\n\n    if (_defaultOptions) {\n      if (_defaultOptions.position) {\n        this.position = _defaultOptions.position;\n      }\n\n      if (_defaultOptions.touchGestures) {\n        this.touchGestures = _defaultOptions.touchGestures;\n      }\n    }\n\n    _ngZone.runOutsideAngular(() => {\n      _elementRef.nativeElement.addEventListener('keydown', this._handleKeydown);\n    });\n  }\n\n  ngAfterViewInit() {\n    // This needs to happen after view init so the initial values for all inputs have been set.\n    this._viewInitialized = true;\n    this._setupPointerEnterEventsIfNeeded();\n\n    this._focusMonitor.monitor(this._elementRef)\n      .pipe(takeUntil(this._destroyed))\n      .subscribe(origin => {\n        // Note that the focus monitor runs outside the Angular zone.\n        if (!origin) {\n          this._ngZone.run(() => this.hide(0));\n        } else if (origin === 'keyboard') {\n          this._ngZone.run(() => this.show());\n        }\n    });\n  }\n\n  /**\n   * Dispose the tooltip when destroyed.\n   */\n  ngOnDestroy() {\n    const nativeElement = this._elementRef.nativeElement;\n\n    clearTimeout(this._touchstartTimeout);\n\n    if (this._overlayRef) {\n      this._overlayRef.dispose();\n      this._tooltipInstance = null;\n    }\n\n    // Clean up the event listeners set in the constructor\n    nativeElement.removeEventListener('keydown', this._handleKeydown);\n    this._passiveListeners.forEach(([event, listener]) => {\n      nativeElement.removeEventListener(event, listener, passiveListenerOptions);\n    });\n    this._passiveListeners.length = 0;\n\n    this._destroyed.next();\n    this._destroyed.complete();\n\n    this._ariaDescriber.removeDescription(nativeElement, this.message);\n    this._focusMonitor.stopMonitoring(nativeElement);\n  }\n\n  /** Shows the tooltip after the delay in ms, defaults to tooltip-delay-show or 0ms if no input */\n  show(delay: number = this.showDelay): void {\n    if (this.disabled || !this.message || (this._isTooltipVisible() &&\n      !this._tooltipInstance!._showTimeoutId && !this._tooltipInstance!._hideTimeoutId)) {\n        return;\n    }\n\n    const overlayRef = this._createOverlay();\n    this._detach();\n    this._portal = this._portal || new ComponentPortal(TooltipComponent, this._viewContainerRef);\n    this._tooltipInstance = overlayRef.attach(this._portal).instance;\n    this._tooltipInstance.afterHidden()\n      .pipe(takeUntil(this._destroyed))\n      .subscribe(() => this._detach());\n    this._setTooltipClass(this._tooltipClass);\n    this._updateTooltipMessage();\n    this._tooltipInstance!.show(delay);\n  }\n\n  /** Hides the tooltip after the delay in ms, defaults to tooltip-delay-hide or 0ms if no input */\n  hide(delay: number = this.hideDelay): void {\n    if (this._tooltipInstance) {\n      this._tooltipInstance.hide(delay);\n    }\n  }\n\n  /** Shows/hides the tooltip */\n  toggle(): void {\n    this._isTooltipVisible() ? this.hide() : this.show();\n  }\n\n  /** Returns true if the tooltip is currently visible to the user */\n  _isTooltipVisible(): boolean {\n    return !!this._tooltipInstance && this._tooltipInstance.isVisible();\n  }\n\n  /**\n   * Handles the keydown events on the host element.\n   * Needs to be an arrow function so that we can use it in addEventListener.\n   */\n  private _handleKeydown = (event: KeyboardEvent) => {\n    if (this._isTooltipVisible() && event.keyCode === ESCAPE && !hasModifierKey(event)) {\n      event.preventDefault();\n      event.stopPropagation();\n      this._ngZone.run(() => this.hide(0));\n    }\n  }\n\n  /** Create the overlay config and position strategy */\n  private _createOverlay(): OverlayRef {\n    if (this._overlayRef) {\n      return this._overlayRef;\n    }\n\n    const scrollableAncestors =\n        this._scrollDispatcher.getAncestorScrollContainers(this._elementRef);\n\n    // Create connected position strategy that listens for scroll events to reposition.\n    const strategy = this._overlay.position()\n                         .flexibleConnectedTo(this._elementRef)\n                         .withTransformOriginOn('.mat-tooltip')\n                         .withFlexibleDimensions(false)\n                         .withViewportMargin(8)\n                         .withScrollableContainers(scrollableAncestors);\n\n    strategy.positionChanges.pipe(takeUntil(this._destroyed)).subscribe(change => {\n      if (this._tooltipInstance) {\n        if (change.scrollableViewProperties.isOverlayClipped && this._tooltipInstance.isVisible()) {\n          // After position changes occur and the overlay is clipped by\n          // a parent scrollable then close the tooltip.\n          this._ngZone.run(() => this.hide(0));\n        }\n      }\n    });\n\n    this._overlayRef = this._overlay.create({\n      direction: this._dir,\n      positionStrategy: strategy,\n      panelClass: TOOLTIP_PANEL_CLASS,\n      scrollStrategy: this._scrollStrategy()\n    });\n\n    this._updatePosition();\n\n    this._overlayRef.detachments()\n      .pipe(takeUntil(this._destroyed))\n      .subscribe(() => this._detach());\n\n    return this._overlayRef;\n  }\n\n  /** Detaches the currently-attached tooltip. */\n  private _detach() {\n    if (this._overlayRef && this._overlayRef.hasAttached()) {\n      this._overlayRef.detach();\n    }\n\n    this._tooltipInstance = null;\n  }\n\n  /** Updates the position of the current tooltip. */\n  private _updatePosition() {\n    const position =\n        this._overlayRef!.getConfig().positionStrategy as FlexibleConnectedPositionStrategy;\n    const origin = this._getOrigin();\n    const overlay = this._getOverlayPosition();\n\n    position.withPositions([\n      {...origin.main, ...overlay.main},\n      {...origin.fallback, ...overlay.fallback}\n    ]);\n  }\n\n  /**\n   * Returns the origin position and a fallback position based on the user's position preference.\n   * The fallback position is the inverse of the origin (e.g. `'below' -> 'above'`).\n   */\n  _getOrigin(): {main: OriginConnectionPosition, fallback: OriginConnectionPosition} {\n    const isLtr = !this._dir || this._dir.value == 'ltr';\n    const position = this.position;\n    let originPosition: OriginConnectionPosition;\n\n    if (position == 'above' || position == 'below') {\n      originPosition = {originX: 'center', originY: position == 'above' ? 'top' : 'bottom'};\n    } else if (\n      position == 'before' ||\n      (position == 'left' && isLtr) ||\n      (position == 'right' && !isLtr)) {\n      originPosition = {originX: 'start', originY: 'center'};\n    } else if (\n      position == 'after' ||\n      (position == 'right' && isLtr) ||\n      (position == 'left' && !isLtr)) {\n      originPosition = {originX: 'end', originY: 'center'};\n    } else if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      throw getMatTooltipInvalidPositionError(position);\n    }\n\n    const {x, y} = this._invertPosition(originPosition!.originX, originPosition!.originY);\n\n    return {\n      main: originPosition!,\n      fallback: {originX: x, originY: y}\n    };\n  }\n\n  /** Returns the overlay position and a fallback position based on the user's preference */\n  _getOverlayPosition(): {main: OverlayConnectionPosition, fallback: OverlayConnectionPosition} {\n    const isLtr = !this._dir || this._dir.value == 'ltr';\n    const position = this.position;\n    let overlayPosition: OverlayConnectionPosition;\n\n    if (position == 'above') {\n      overlayPosition = {overlayX: 'center', overlayY: 'bottom'};\n    } else if (position == 'below') {\n      overlayPosition = {overlayX: 'center', overlayY: 'top'};\n    } else if (\n      position == 'before' ||\n      (position == 'left' && isLtr) ||\n      (position == 'right' && !isLtr)) {\n      overlayPosition = {overlayX: 'end', overlayY: 'center'};\n    } else if (\n      position == 'after' ||\n      (position == 'right' && isLtr) ||\n      (position == 'left' && !isLtr)) {\n      overlayPosition = {overlayX: 'start', overlayY: 'center'};\n    } else if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      throw getMatTooltipInvalidPositionError(position);\n    }\n\n    const {x, y} = this._invertPosition(overlayPosition!.overlayX, overlayPosition!.overlayY);\n\n    return {\n      main: overlayPosition!,\n      fallback: {overlayX: x, overlayY: y}\n    };\n  }\n\n  /** Updates the tooltip message and repositions the overlay according to the new message length */\n  private _updateTooltipMessage() {\n    // Must wait for the message to be painted to the tooltip so that the overlay can properly\n    // calculate the correct positioning based on the size of the text.\n    if (this._tooltipInstance) {\n      this._tooltipInstance.message = this.message;\n      this._tooltipInstance._markForCheck();\n\n      this._ngZone.onMicrotaskEmpty.pipe(\n        take(1),\n        takeUntil(this._destroyed)\n      ).subscribe(() => {\n        if (this._tooltipInstance) {\n          this._overlayRef!.updatePosition();\n        }\n      });\n    }\n  }\n\n  /** Updates the tooltip class */\n  private _setTooltipClass(tooltipClass: string|string[]|Set<string>|{[key: string]: any}) {\n    if (this._tooltipInstance) {\n      this._tooltipInstance.tooltipClass = tooltipClass;\n      this._tooltipInstance._markForCheck();\n    }\n  }\n\n  /** Inverts an overlay position. */\n  private _invertPosition(x: HorizontalConnectionPos, y: VerticalConnectionPos) {\n    if (this.position === 'above' || this.position === 'below') {\n      if (y === 'top') {\n        y = 'bottom';\n      } else if (y === 'bottom') {\n        y = 'top';\n      }\n    } else {\n      if (x === 'end') {\n        x = 'start';\n      } else if (x === 'start') {\n        x = 'end';\n      }\n    }\n\n    return {x, y};\n  }\n\n  /** Binds the pointer events to the tooltip trigger. */\n  private _setupPointerEnterEventsIfNeeded() {\n    // Optimization: Defer hooking up events if there's no message or the tooltip is disabled.\n    if (this._disabled || !this.message || !this._viewInitialized ||\n        this._passiveListeners.length) {\n      return;\n    }\n\n    // The mouse events shouldn't be bound on mobile devices, because they can prevent the\n    // first tap from firing its click event or can cause the tooltip to open for clicks.\n    if (this._platformSupportsMouseEvents()) {\n      this._passiveListeners\n          .push(['mouseenter', () => {\n            this._setupPointerExitEventsIfNeeded();\n            this.show();\n          }]);\n    } else if (this.touchGestures !== 'off') {\n      this._disableNativeGesturesIfNecessary();\n\n      this._passiveListeners\n          .push(['touchstart', () => {\n            // Note that it's important that we don't `preventDefault` here,\n            // because it can prevent click events from firing on the element.\n            this._setupPointerExitEventsIfNeeded();\n            clearTimeout(this._touchstartTimeout);\n            this._touchstartTimeout = setTimeout(() => this.show(), LONGPRESS_DELAY);\n          }]);\n    }\n\n    this._addListeners(this._passiveListeners);\n  }\n\n  private _setupPointerExitEventsIfNeeded() {\n    if (this._pointerExitEventsInitialized) {\n      return;\n    }\n    this._pointerExitEventsInitialized = true;\n\n    const exitListeners: (readonly [string, EventListenerOrEventListenerObject])[] = [];\n    if (this._platformSupportsMouseEvents()) {\n      exitListeners.push(['mouseleave', () => this.hide()]);\n    } else if (this.touchGestures !== 'off') {\n      this._disableNativeGesturesIfNecessary();\n      const touchendListener = () => {\n        clearTimeout(this._touchstartTimeout);\n        this.hide(this._defaultOptions.touchendHideDelay);\n      };\n\n      exitListeners.push(\n        ['touchend', touchendListener],\n        ['touchcancel', touchendListener],\n      );\n    }\n\n    this._addListeners(exitListeners);\n    this._passiveListeners.push(...exitListeners);\n  }\n\n  private _addListeners(\n      listeners: ReadonlyArray<readonly [string, EventListenerOrEventListenerObject]>) {\n    listeners.forEach(([event, listener]) => {\n      this._elementRef.nativeElement.addEventListener(event, listener, passiveListenerOptions);\n    });\n  }\n\n  private _platformSupportsMouseEvents() {\n    return !this._platform.IOS && !this._platform.ANDROID;\n  }\n\n  /** Disables the native browser gestures, based on how the tooltip has been configured. */\n  private _disableNativeGesturesIfNecessary() {\n    const gestures = this.touchGestures;\n\n    if (gestures !== 'off') {\n      const element = this._elementRef.nativeElement;\n      const style = element.style;\n\n      // If gestures are set to `auto`, we don't disable text selection on inputs and\n      // textareas, because it prevents the user from typing into them on iOS Safari.\n      if (gestures === 'on' || (element.nodeName !== 'INPUT' && element.nodeName !== 'TEXTAREA')) {\n        style.userSelect = (style as any).msUserSelect = style.webkitUserSelect =\n            (style as any).MozUserSelect = 'none';\n      }\n\n      // If we have `auto` gestures and the element uses native HTML dragging,\n      // we don't set `-webkit-user-drag` because it prevents the native behavior.\n      if (gestures === 'on' || !element.draggable) {\n        (style as any).webkitUserDrag = 'none';\n      }\n\n      style.touchAction = 'none';\n      style.webkitTapHighlightColor = 'transparent';\n    }\n  }\n\n  static ngAcceptInputType_disabled: BooleanInput;\n  static ngAcceptInputType_hideDelay: NumberInput;\n  static ngAcceptInputType_showDelay: NumberInput;\n}\n\n/**\n * Internal component that wraps the tooltip's content.\n * @docs-private\n */\n@Component({\n  selector: 'mat-tooltip-component',\n  templateUrl: 'tooltip.html',\n  styleUrls: ['tooltip.css'],\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  animations: [matTooltipAnimations.tooltipState],\n  host: {\n    // Forces the element to have a layout in IE and Edge. This fixes issues where the element\n    // won't be rendered if the animations are disabled or there is no web animations polyfill.\n    '[style.zoom]': '_visibility === \"visible\" ? 1 : null',\n    '(body:click)': 'this._handleBodyInteraction()',\n    'aria-hidden': 'true',\n  }\n})\nexport class TooltipComponent implements OnDestroy {\n  /** Message to display in the tooltip */\n  message: string;\n\n  /** Classes to be added to the tooltip. Supports the same syntax as `ngClass`. */\n  tooltipClass: string|string[]|Set<string>|{[key: string]: any};\n\n  /** The timeout ID of any current timer set to show the tooltip */\n  _showTimeoutId: number | null;\n\n  /** The timeout ID of any current timer set to hide the tooltip */\n  _hideTimeoutId: number | null;\n\n  /** Property watched by the animation framework to show or hide the tooltip */\n  _visibility: TooltipVisibility = 'initial';\n\n  /** Whether interactions on the page should close the tooltip */\n  private _closeOnInteraction: boolean = false;\n\n  /** Subject for notifying that the tooltip has been hidden from the view */\n  private readonly _onHide: Subject<void> = new Subject();\n\n  /** Stream that emits whether the user has a handset-sized display.  */\n  _isHandset: Observable<BreakpointState> = this._breakpointObserver.observe(Breakpoints.Handset);\n\n  constructor(\n    private _changeDetectorRef: ChangeDetectorRef,\n    private _breakpointObserver: BreakpointObserver) {}\n\n  /**\n   * Shows the tooltip with an animation originating from the provided origin\n   * @param delay Amount of milliseconds to the delay showing the tooltip.\n   */\n  show(delay: number): void {\n    // Cancel the delayed hide if it is scheduled\n    if (this._hideTimeoutId) {\n      clearTimeout(this._hideTimeoutId);\n      this._hideTimeoutId = null;\n    }\n\n    // Body interactions should cancel the tooltip if there is a delay in showing.\n    this._closeOnInteraction = true;\n    this._showTimeoutId = setTimeout(() => {\n      this._visibility = 'visible';\n      this._showTimeoutId = null;\n\n      // Mark for check so if any parent component has set the\n      // ChangeDetectionStrategy to OnPush it will be checked anyways\n      this._markForCheck();\n    }, delay);\n  }\n\n  /**\n   * Begins the animation to hide the tooltip after the provided delay in ms.\n   * @param delay Amount of milliseconds to delay showing the tooltip.\n   */\n  hide(delay: number): void {\n    // Cancel the delayed show if it is scheduled\n    if (this._showTimeoutId) {\n      clearTimeout(this._showTimeoutId);\n      this._showTimeoutId = null;\n    }\n\n    this._hideTimeoutId = setTimeout(() => {\n      this._visibility = 'hidden';\n      this._hideTimeoutId = null;\n\n      // Mark for check so if any parent component has set the\n      // ChangeDetectionStrategy to OnPush it will be checked anyways\n      this._markForCheck();\n    }, delay);\n  }\n\n  /** Returns an observable that notifies when the tooltip has been hidden from view. */\n  afterHidden(): Observable<void> {\n    return this._onHide;\n  }\n\n  /** Whether the tooltip is being displayed. */\n  isVisible(): boolean {\n    return this._visibility === 'visible';\n  }\n\n  ngOnDestroy() {\n    this._onHide.complete();\n  }\n\n  _animationStart() {\n    this._closeOnInteraction = false;\n  }\n\n  _animationDone(event: AnimationEvent): void {\n    const toState = event.toState as TooltipVisibility;\n\n    if (toState === 'hidden' && !this.isVisible()) {\n      this._onHide.next();\n    }\n\n    if (toState === 'visible' || toState === 'hidden') {\n      this._closeOnInteraction = true;\n    }\n  }\n\n  /**\n   * Interactions on the HTML body should close the tooltip immediately as defined in the\n   * material design spec.\n   * https://material.io/design/components/tooltips.html#behavior\n   */\n  _handleBodyInteraction(): void {\n    if (this._closeOnInteraction) {\n      this.hide(0);\n    }\n  }\n\n  /**\n   * Marks that the tooltip needs to be checked in the next change detection run.\n   * Mainly used for rendering the initial text before positioning a tooltip, which\n   * can be problematic in components with OnPush change detection.\n   */\n  _markForCheck(): void {\n    this._changeDetectorRef.markForCheck();\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {OverlayModule} from '@angular/cdk/overlay';\nimport {A11yModule} from '@angular/cdk/a11y';\nimport {CommonModule} from '@angular/common';\nimport {NgModule} from '@angular/core';\nimport {MatCommonModule} from '@angular/material/core';\nimport {CdkScrollableModule} from '@angular/cdk/scrolling';\nimport {\n  MatTooltip,\n  TooltipComponent,\n  MAT_TOOLTIP_SCROLL_STRATEGY_FACTORY_PROVIDER,\n} from './tooltip';\n\n@NgModule({\n  imports: [\n    A11yModule,\n    CommonModule,\n    OverlayModule,\n    MatCommonModule,\n  ],\n  exports: [MatTooltip, TooltipComponent, MatCommonModule, CdkScrollableModule],\n  declarations: [MatTooltip, TooltipComponent],\n  entryComponents: [TooltipComponent],\n  providers: [MAT_TOOLTIP_SCROLL_STRATEGY_FACTORY_PROVIDER]\n})\nexport class MatTooltipModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './tooltip-module';\nexport * from './tooltip';\nexport * from './tooltip-animations';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar concatAll_1 = require(\"../../operator/concatAll\");\nrxjs_1.Observable.prototype.concatAll = concatAll_1.concatAll;\n//# sourceMappingURL=concatAll.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {AnimationMetadata, AnimationOptions} from './animation_metadata';\nimport {AnimationPlayer} from './players/animation_player';\n\n/**\n * An injectable service that produces an animation sequence programmatically within an\n * Angular component or directive.\n * Provided by the `BrowserAnimationsModule` or `NoopAnimationsModule`.\n *\n * @usageNotes\n *\n * To use this service, add it to your component or directive as a dependency.\n * The service is instantiated along with your component.\n *\n * Apps do not typically need to create their own animation players, but if you\n * do need to, follow these steps:\n *\n * 1. Use the `build()` method to create a programmatic animation using the\n * `animate()` function. The method returns an `AnimationFactory` instance.\n *\n * 2. Use the factory object to create an `AnimationPlayer` and attach it to a DOM element.\n *\n * 3. Use the player object to control the animation programmatically.\n *\n * For example:\n *\n * ```ts\n * // import the service from BrowserAnimationsModule\n * import {AnimationBuilder} from '@angular/animations';\n * // require the service as a dependency\n * class MyCmp {\n *   constructor(private _builder: AnimationBuilder) {}\n *\n *   makeAnimation(element: any) {\n *     // first define a reusable animation\n *     const myAnimation = this._builder.build([\n *       style({ width: 0 }),\n *       animate(1000, style({ width: '100px' }))\n *     ]);\n *\n *     // use the returned factory object to create a player\n *     const player = myAnimation.create(element);\n *\n *     player.play();\n *   }\n * }\n * ```\n *\n * @publicApi\n */\nexport abstract class AnimationBuilder {\n  /**\n   * Builds a factory for producing a defined animation.\n   * @param animation A reusable animation definition.\n   * @returns A factory object that can create a player for the defined animation.\n   * @see `animate()`\n   */\n  abstract build(animation: AnimationMetadata|AnimationMetadata[]): AnimationFactory;\n}\n\n/**\n * A factory object returned from the `AnimationBuilder`.`build()` method.\n *\n * @publicApi\n */\nexport abstract class AnimationFactory {\n  /**\n   * Creates an `AnimationPlayer` instance for the reusable animation defined by\n   * the `AnimationBuilder`.`build()` method that created this factory.\n   * Attaches the new player a DOM element.\n   * @param element The DOM element to which to attach the animation.\n   * @param options A set of options that can include a time delay and\n   * additional developer-defined parameters.\n   */\n  abstract create(element: any, options?: AnimationOptions): AnimationPlayer;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * Represents a set of CSS styles for use in an animation style.\n */\nexport interface ɵStyleData {\n  [key: string]: string|number;\n}\n\n/**\n * Represents animation-step timing parameters for an animation step.\n * @see `animate()`\n *\n * @publicApi\n */\nexport declare type AnimateTimings = {\n  /**\n   * The full duration of an animation step. A number and optional time unit,\n   * such as \"1s\" or \"10ms\" for one second and 10 milliseconds, respectively.\n   * The default unit is milliseconds.\n   */\n  duration: number,\n  /**\n   * The delay in applying an animation step. A number and optional time unit.\n   * The default unit is milliseconds.\n   */\n  delay: number,\n  /**\n   * An easing style that controls how an animations step accelerates\n   * and decelerates during its run time. An easing function such as `cubic-bezier()`,\n   * or one of the following constants:\n   * - `ease-in`\n   * - `ease-out`\n   * - `ease-in-and-out`\n   */\n  easing: string | null\n};\n\n/**\n * @description Options that control animation styling and timing.\n *\n * The following animation functions accept `AnimationOptions` data:\n *\n * - `transition()`\n * - `sequence()`\n * - `{@link animations/group group()}`\n * - `query()`\n * - `animation()`\n * - `useAnimation()`\n * - `animateChild()`\n *\n * Programmatic animations built using the `AnimationBuilder` service also\n * make use of `AnimationOptions`.\n *\n * @publicApi\n */\nexport declare interface AnimationOptions {\n  /**\n   * Sets a time-delay for initiating an animation action.\n   * A number and optional time unit, such as \"1s\" or \"10ms\" for one second\n   * and 10 milliseconds, respectively.The default unit is milliseconds.\n   * Default value is 0, meaning no delay.\n   */\n  delay?: number|string;\n  /**\n   * A set of developer-defined parameters that modify styling and timing\n   * when an animation action starts. An array of key-value pairs, where the provided value\n   * is used as a default.\n   */\n  params?: {[name: string]: any};\n}\n\n/**\n * Adds duration options to control animation styling and timing for a child animation.\n *\n * @see `animateChild()`\n *\n * @publicApi\n */\nexport declare interface AnimateChildOptions extends AnimationOptions {\n  duration?: number|string;\n}\n\n/**\n * @description Constants for the categories of parameters that can be defined for animations.\n *\n * A corresponding function defines a set of parameters for each category, and\n * collects them into a corresponding `AnimationMetadata` object.\n *\n * @publicApi\n */\nexport const enum AnimationMetadataType {\n  /**\n   * Associates a named animation state with a set of CSS styles.\n   * See `state()`\n   */\n  State = 0,\n  /**\n   * Data for a transition from one animation state to another.\n   * See `transition()`\n   */\n  Transition = 1,\n  /**\n   * Contains a set of animation steps.\n   * See `sequence()`\n   */\n  Sequence = 2,\n  /**\n   * Contains a set of animation steps.\n   * See `{@link animations/group group()}`\n   */\n  Group = 3,\n  /**\n   * Contains an animation step.\n   * See `animate()`\n   */\n  Animate = 4,\n  /**\n   * Contains a set of animation steps.\n   * See `keyframes()`\n   */\n  Keyframes = 5,\n  /**\n   * Contains a set of CSS property-value pairs into a named style.\n   * See `style()`\n   */\n  Style = 6,\n  /**\n   * Associates an animation with an entry trigger that can be attached to an element.\n   * See `trigger()`\n   */\n  Trigger = 7,\n  /**\n   * Contains a re-usable animation.\n   * See `animation()`\n   */\n  Reference = 8,\n  /**\n   * Contains data to use in executing child animations returned by a query.\n   * See `animateChild()`\n   */\n  AnimateChild = 9,\n  /**\n   * Contains animation parameters for a re-usable animation.\n   * See `useAnimation()`\n   */\n  AnimateRef = 10,\n  /**\n   * Contains child-animation query data.\n   * See `query()`\n   */\n  Query = 11,\n  /**\n   * Contains data for staggering an animation sequence.\n   * See `stagger()`\n   */\n  Stagger = 12\n}\n\n/**\n * Specifies automatic styling.\n *\n * @publicApi\n */\nexport const AUTO_STYLE = '*';\n\n/**\n * Base for animation data structures.\n *\n * @publicApi\n */\nexport interface AnimationMetadata {\n  type: AnimationMetadataType;\n}\n\n/**\n * Contains an animation trigger. Instantiated and returned by the\n * `trigger()` function.\n *\n * @publicApi\n */\nexport interface AnimationTriggerMetadata extends AnimationMetadata {\n  /**\n   * The trigger name, used to associate it with an element. Unique within the component.\n   */\n  name: string;\n  /**\n   * An animation definition object, containing an array of state and transition declarations.\n   */\n  definitions: AnimationMetadata[];\n  /**\n   * An options object containing a delay and\n   * developer-defined parameters that provide styling defaults and\n   * can be overridden on invocation. Default delay is 0.\n   */\n  options: {params?: {[name: string]: any}}|null;\n}\n\n/**\n * Encapsulates an animation state by associating a state name with a set of CSS styles.\n * Instantiated and returned by the `state()` function.\n *\n * @publicApi\n */\nexport interface AnimationStateMetadata extends AnimationMetadata {\n  /**\n   * The state name, unique within the component.\n   */\n  name: string;\n  /**\n   *  The CSS styles associated with this state.\n   */\n  styles: AnimationStyleMetadata;\n  /**\n   * An options object containing\n   * developer-defined parameters that provide styling defaults and\n   * can be overridden on invocation.\n   */\n  options?: {params: {[name: string]: any}};\n}\n\n/**\n * Encapsulates an animation transition. Instantiated and returned by the\n * `transition()` function.\n *\n * @publicApi\n */\nexport interface AnimationTransitionMetadata extends AnimationMetadata {\n  /**\n   * An expression that describes a state change.\n   */\n  expr: string|\n      ((fromState: string, toState: string, element?: any,\n        params?: {[key: string]: any}) => boolean);\n  /**\n   * One or more animation objects to which this transition applies.\n   */\n  animation: AnimationMetadata|AnimationMetadata[];\n  /**\n   * An options object containing a delay and\n   * developer-defined parameters that provide styling defaults and\n   * can be overridden on invocation. Default delay is 0.\n   */\n  options: AnimationOptions|null;\n}\n\n/**\n * Encapsulates a reusable animation, which is a collection of individual animation steps.\n * Instantiated and returned by the `animation()` function, and\n * passed to the `useAnimation()` function.\n *\n * @publicApi\n */\nexport interface AnimationReferenceMetadata extends AnimationMetadata {\n  /**\n   *  One or more animation step objects.\n   */\n  animation: AnimationMetadata|AnimationMetadata[];\n  /**\n   * An options object containing a delay and\n   * developer-defined parameters that provide styling defaults and\n   * can be overridden on invocation. Default delay is 0.\n   */\n  options: AnimationOptions|null;\n}\n\n/**\n * Encapsulates an animation query. Instantiated and returned by\n * the `query()` function.\n *\n * @publicApi\n */\nexport interface AnimationQueryMetadata extends AnimationMetadata {\n  /**\n   *  The CSS selector for this query.\n   */\n  selector: string;\n  /**\n   * One or more animation step objects.\n   */\n  animation: AnimationMetadata|AnimationMetadata[];\n  /**\n   * A query options object.\n   */\n  options: AnimationQueryOptions|null;\n}\n\n/**\n * Encapsulates a keyframes sequence. Instantiated and returned by\n * the `keyframes()` function.\n *\n * @publicApi\n */\nexport interface AnimationKeyframesSequenceMetadata extends AnimationMetadata {\n  /**\n   * An array of animation styles.\n   */\n  steps: AnimationStyleMetadata[];\n}\n\n/**\n * Encapsulates an animation style. Instantiated and returned by\n * the `style()` function.\n *\n * @publicApi\n */\nexport interface AnimationStyleMetadata extends AnimationMetadata {\n  /**\n   * A set of CSS style properties.\n   */\n  styles: '*'|{[key: string]: string | number}|Array<{[key: string]: string | number}|'*'>;\n  /**\n   * A percentage of the total animate time at which the style is to be applied.\n   */\n  offset: number|null;\n}\n\n/**\n * Encapsulates an animation step. Instantiated and returned by\n * the `animate()` function.\n *\n * @publicApi\n */\nexport interface AnimationAnimateMetadata extends AnimationMetadata {\n  /**\n   * The timing data for the step.\n   */\n  timings: string|number|AnimateTimings;\n  /**\n   * A set of styles used in the step.\n   */\n  styles: AnimationStyleMetadata|AnimationKeyframesSequenceMetadata|null;\n}\n\n/**\n * Encapsulates a child animation, that can be run explicitly when the parent is run.\n * Instantiated and returned by the `animateChild` function.\n *\n * @publicApi\n */\nexport interface AnimationAnimateChildMetadata extends AnimationMetadata {\n  /**\n   * An options object containing a delay and\n   * developer-defined parameters that provide styling defaults and\n   * can be overridden on invocation. Default delay is 0.\n   */\n  options: AnimationOptions|null;\n}\n\n/**\n * Encapsulates a reusable animation.\n * Instantiated and returned by the `useAnimation()` function.\n *\n * @publicApi\n */\nexport interface AnimationAnimateRefMetadata extends AnimationMetadata {\n  /**\n   * An animation reference object.\n   */\n  animation: AnimationReferenceMetadata;\n  /**\n   * An options object containing a delay and\n   * developer-defined parameters that provide styling defaults and\n   * can be overridden on invocation. Default delay is 0.\n   */\n  options: AnimationOptions|null;\n}\n\n/**\n * Encapsulates an animation sequence.\n * Instantiated and returned by the `sequence()` function.\n *\n * @publicApi\n */\nexport interface AnimationSequenceMetadata extends AnimationMetadata {\n  /**\n   *  An array of animation step objects.\n   */\n  steps: AnimationMetadata[];\n  /**\n   * An options object containing a delay and\n   * developer-defined parameters that provide styling defaults and\n   * can be overridden on invocation. Default delay is 0.\n   */\n  options: AnimationOptions|null;\n}\n\n/**\n * Encapsulates an animation group.\n * Instantiated and returned by the `{@link animations/group group()}` function.\n *\n * @publicApi\n */\nexport interface AnimationGroupMetadata extends AnimationMetadata {\n  /**\n   * One or more animation or style steps that form this group.\n   */\n  steps: AnimationMetadata[];\n  /**\n   * An options object containing a delay and\n   * developer-defined parameters that provide styling defaults and\n   * can be overridden on invocation. Default delay is 0.\n   */\n  options: AnimationOptions|null;\n}\n\n/**\n * Encapsulates animation query options.\n * Passed to the `query()` function.\n *\n * @publicApi\n */\nexport declare interface AnimationQueryOptions extends AnimationOptions {\n  /**\n   * True if this query is optional, false if it is required. Default is false.\n   * A required query throws an error if no elements are retrieved when\n   * the query is executed. An optional query does not.\n   *\n   */\n  optional?: boolean;\n  /**\n   * A maximum total number of results to return from the query.\n   * If negative, results are limited from the end of the query list towards the beginning.\n   * By default, results are not limited.\n   */\n  limit?: number;\n}\n\n/**\n * Encapsulates parameters for staggering the start times of a set of animation steps.\n * Instantiated and returned by the `stagger()` function.\n *\n * @publicApi\n **/\nexport interface AnimationStaggerMetadata extends AnimationMetadata {\n  /**\n   * The timing data for the steps.\n   */\n  timings: string|number;\n  /**\n   * One or more animation steps.\n   */\n  animation: AnimationMetadata|AnimationMetadata[];\n}\n\n/**\n * Creates a named animation trigger, containing a  list of `state()`\n * and `transition()` entries to be evaluated when the expression\n * bound to the trigger changes.\n *\n * @param name An identifying string.\n * @param definitions  An animation definition object, containing an array of `state()`\n * and `transition()` declarations.\n *\n * @return An object that encapsulates the trigger data.\n *\n * @usageNotes\n * Define an animation trigger in the `animations` section of `@Component` metadata.\n * In the template, reference the trigger by name and bind it to a trigger expression that\n * evaluates to a defined animation state, using the following format:\n *\n * `[@triggerName]=\"expression\"`\n *\n * Animation trigger bindings convert all values to strings, and then match the\n * previous and current values against any linked transitions.\n * Booleans can be specified as `1` or `true` and `0` or `false`.\n *\n * ### Usage Example\n *\n * The following example creates an animation trigger reference based on the provided\n * name value.\n * The provided animation value is expected to be an array consisting of state and\n * transition declarations.\n *\n * ```typescript\n * @Component({\n *   selector: \"my-component\",\n *   templateUrl: \"my-component-tpl.html\",\n *   animations: [\n *     trigger(\"myAnimationTrigger\", [\n *       state(...),\n *       state(...),\n *       transition(...),\n *       transition(...)\n *     ])\n *   ]\n * })\n * class MyComponent {\n *   myStatusExp = \"something\";\n * }\n * ```\n *\n * The template associated with this component makes use of the defined trigger\n * by binding to an element within its template code.\n *\n * ```html\n * <!-- somewhere inside of my-component-tpl.html -->\n * <div [@myAnimationTrigger]=\"myStatusExp\">...</div>\n * ```\n *\n * ### Using an inline function\n * The `transition` animation method also supports reading an inline function which can decide\n * if its associated animation should be run.\n *\n * ```typescript\n * // this method is run each time the `myAnimationTrigger` trigger value changes.\n * function myInlineMatcherFn(fromState: string, toState: string, element: any, params: {[key:\n string]: any}): boolean {\n *   // notice that `element` and `params` are also available here\n *   return toState == 'yes-please-animate';\n * }\n *\n * @Component({\n *   selector: 'my-component',\n *   templateUrl: 'my-component-tpl.html',\n *   animations: [\n *     trigger('myAnimationTrigger', [\n *       transition(myInlineMatcherFn, [\n *         // the animation sequence code\n *       ]),\n *     ])\n *   ]\n * })\n * class MyComponent {\n *   myStatusExp = \"yes-please-animate\";\n * }\n * ```\n *\n * ### Disabling Animations\n * When true, the special animation control binding `@.disabled` binding prevents\n * all animations from rendering.\n * Place the  `@.disabled` binding on an element to disable\n * animations on the element itself, as well as any inner animation triggers\n * within the element.\n *\n * The following example shows how to use this feature:\n *\n * ```typescript\n * @Component({\n *   selector: 'my-component',\n *   template: `\n *     <div [@.disabled]=\"isDisabled\">\n *       <div [@childAnimation]=\"exp\"></div>\n *     </div>\n *   `,\n *   animations: [\n *     trigger(\"childAnimation\", [\n *       // ...\n *     ])\n *   ]\n * })\n * class MyComponent {\n *   isDisabled = true;\n *   exp = '...';\n * }\n * ```\n *\n * When `@.disabled` is true, it prevents the `@childAnimation` trigger from animating,\n * along with any inner animations.\n *\n * ### Disable animations application-wide\n * When an area of the template is set to have animations disabled,\n * **all** inner components have their animations disabled as well.\n * This means that you can disable all animations for an app\n * by placing a host binding set on `@.disabled` on the topmost Angular component.\n *\n * ```typescript\n * import {Component, HostBinding} from '@angular/core';\n *\n * @Component({\n *   selector: 'app-component',\n *   templateUrl: 'app.component.html',\n * })\n * class AppComponent {\n *   @HostBinding('@.disabled')\n *   public animationsDisabled = true;\n * }\n * ```\n *\n * ### Overriding disablement of inner animations\n * Despite inner animations being disabled, a parent animation can `query()`\n * for inner elements located in disabled areas of the template and still animate\n * them if needed. This is also the case for when a sub animation is\n * queried by a parent and then later animated using `animateChild()`.\n *\n * ### Detecting when an animation is disabled\n * If a region of the DOM (or the entire application) has its animations disabled, the animation\n * trigger callbacks still fire, but for zero seconds. When the callback fires, it provides\n * an instance of an `AnimationEvent`. If animations are disabled,\n * the `.disabled` flag on the event is true.\n *\n * @publicApi\n */\nexport function trigger(name: string, definitions: AnimationMetadata[]): AnimationTriggerMetadata {\n  return {type: AnimationMetadataType.Trigger, name, definitions, options: {}};\n}\n\n/**\n * Defines an animation step that combines styling information with timing information.\n *\n * @param timings Sets `AnimateTimings` for the parent animation.\n * A string in the format \"duration [delay] [easing]\".\n *  - Duration and delay are expressed as a number and optional time unit,\n * such as \"1s\" or \"10ms\" for one second and 10 milliseconds, respectively.\n * The default unit is milliseconds.\n *  - The easing value controls how the animation accelerates and decelerates\n * during its runtime. Value is one of  `ease`, `ease-in`, `ease-out`,\n * `ease-in-out`, or a `cubic-bezier()` function call.\n * If not supplied, no easing is applied.\n *\n * For example, the string \"1s 100ms ease-out\" specifies a duration of\n * 1000 milliseconds, and delay of 100 ms, and the \"ease-out\" easing style,\n * which decelerates near the end of the duration.\n * @param styles Sets AnimationStyles for the parent animation.\n * A function call to either `style()` or `keyframes()`\n * that returns a collection of CSS style entries to be applied to the parent animation.\n * When null, uses the styles from the destination state.\n * This is useful when describing an animation step that will complete an animation;\n * see \"Animating to the final state\" in `transitions()`.\n * @returns An object that encapsulates the animation step.\n *\n * @usageNotes\n * Call within an animation `sequence()`, `{@link animations/group group()}`, or\n * `transition()` call to specify an animation step\n * that applies given style data to the parent animation for a given amount of time.\n *\n * ### Syntax Examples\n * **Timing examples**\n *\n * The following examples show various `timings` specifications.\n * - `animate(500)` : Duration is 500 milliseconds.\n * - `animate(\"1s\")` : Duration is 1000 milliseconds.\n * - `animate(\"100ms 0.5s\")` : Duration is 100 milliseconds, delay is 500 milliseconds.\n * - `animate(\"5s ease-in\")` : Duration is 5000 milliseconds, easing in.\n * - `animate(\"5s 10ms cubic-bezier(.17,.67,.88,.1)\")` : Duration is 5000 milliseconds, delay is 10\n * milliseconds, easing according to a bezier curve.\n *\n * **Style examples**\n *\n * The following example calls `style()` to set a single CSS style.\n * ```typescript\n * animate(500, style({ background: \"red\" }))\n * ```\n * The following example calls `keyframes()` to set a CSS style\n * to different values for successive keyframes.\n * ```typescript\n * animate(500, keyframes(\n *  [\n *   style({ background: \"blue\" })),\n *   style({ background: \"red\" }))\n *  ])\n * ```\n *\n * @publicApi\n */\nexport function animate(\n    timings: string|number,\n    styles: AnimationStyleMetadata|AnimationKeyframesSequenceMetadata|null =\n        null): AnimationAnimateMetadata {\n  return {type: AnimationMetadataType.Animate, styles, timings};\n}\n\n/**\n * @description Defines a list of animation steps to be run in parallel.\n *\n * @param steps An array of animation step objects.\n * - When steps are defined by `style()` or `animate()`\n * function calls, each call within the group is executed instantly.\n * - To specify offset styles to be applied at a later time, define steps with\n * `keyframes()`, or use `animate()` calls with a delay value.\n * For example:\n *\n * ```typescript\n * group([\n *   animate(\"1s\", style({ background: \"black\" })),\n *   animate(\"2s\", style({ color: \"white\" }))\n * ])\n * ```\n *\n * @param options An options object containing a delay and\n * developer-defined parameters that provide styling defaults and\n * can be overridden on invocation.\n *\n * @return An object that encapsulates the group data.\n *\n * @usageNotes\n * Grouped animations are useful when a series of styles must be\n * animated at different starting times and closed off at different ending times.\n *\n * When called within a `sequence()` or a\n * `transition()` call, does not continue to the next\n * instruction until all of the inner animation steps have completed.\n *\n * @publicApi\n */\nexport function group(\n    steps: AnimationMetadata[], options: AnimationOptions|null = null): AnimationGroupMetadata {\n  return {type: AnimationMetadataType.Group, steps, options};\n}\n\n/**\n * Defines a list of animation steps to be run sequentially, one by one.\n *\n * @param steps An array of animation step objects.\n * - Steps defined by `style()` calls apply the styling data immediately.\n * - Steps defined by `animate()` calls apply the styling data over time\n *   as specified by the timing data.\n *\n * ```typescript\n * sequence([\n *   style({ opacity: 0 }),\n *   animate(\"1s\", style({ opacity: 1 }))\n * ])\n * ```\n *\n * @param options An options object containing a delay and\n * developer-defined parameters that provide styling defaults and\n * can be overridden on invocation.\n *\n * @return An object that encapsulates the sequence data.\n *\n * @usageNotes\n * When you pass an array of steps to a\n * `transition()` call, the steps run sequentially by default.\n * Compare this to the `{@link animations/group group()}` call, which runs animation steps in\n *parallel.\n *\n * When a sequence is used within a `{@link animations/group group()}` or a `transition()` call,\n * execution continues to the next instruction only after each of the inner animation\n * steps have completed.\n *\n * @publicApi\n **/\nexport function sequence(\n    steps: AnimationMetadata[], options: AnimationOptions|null = null): AnimationSequenceMetadata {\n  return {type: AnimationMetadataType.Sequence, steps, options};\n}\n\n/**\n * Declares a key/value object containing CSS properties/styles that\n * can then be used for an animation `state`, within an animation `sequence`,\n * or as styling data for calls to `animate()` and `keyframes()`.\n *\n * @param tokens A set of CSS styles or HTML styles associated with an animation state.\n * The value can be any of the following:\n * - A key-value style pair associating a CSS property with a value.\n * - An array of key-value style pairs.\n * - An asterisk (*), to use auto-styling, where styles are derived from the element\n * being animated and applied to the animation when it starts.\n *\n * Auto-styling can be used to define a state that depends on layout or other\n * environmental factors.\n *\n * @return An object that encapsulates the style data.\n *\n * @usageNotes\n * The following examples create animation styles that collect a set of\n * CSS property values:\n *\n * ```typescript\n * // string values for CSS properties\n * style({ background: \"red\", color: \"blue\" })\n *\n * // numerical pixel values\n * style({ width: 100, height: 0 })\n * ```\n *\n * The following example uses auto-styling to allow a component to animate from\n * a height of 0 up to the height of the parent element:\n *\n * ```\n * style({ height: 0 }),\n * animate(\"1s\", style({ height: \"*\" }))\n * ```\n *\n * @publicApi\n **/\nexport function style(tokens: '*'|{[key: string]: string | number}|\n                      Array<'*'|{[key: string]: string | number}>): AnimationStyleMetadata {\n  return {type: AnimationMetadataType.Style, styles: tokens, offset: null};\n}\n\n/**\n * Declares an animation state within a trigger attached to an element.\n *\n * @param name One or more names for the defined state in a comma-separated string.\n * The following reserved state names can be supplied to define a style for specific use\n * cases:\n *\n * - `void` You can associate styles with this name to be used when\n * the element is detached from the application. For example, when an `ngIf` evaluates\n * to false, the state of the associated element is void.\n *  - `*` (asterisk) Indicates the default state. You can associate styles with this name\n * to be used as the fallback when the state that is being animated is not declared\n * within the trigger.\n *\n * @param styles A set of CSS styles associated with this state, created using the\n * `style()` function.\n * This set of styles persists on the element once the state has been reached.\n * @param options Parameters that can be passed to the state when it is invoked.\n * 0 or more key-value pairs.\n * @return An object that encapsulates the new state data.\n *\n * @usageNotes\n * Use the `trigger()` function to register states to an animation trigger.\n * Use the `transition()` function to animate between states.\n * When a state is active within a component, its associated styles persist on the element,\n * even when the animation ends.\n *\n * @publicApi\n **/\nexport function state(\n    name: string, styles: AnimationStyleMetadata,\n    options?: {params: {[name: string]: any}}): AnimationStateMetadata {\n  return {type: AnimationMetadataType.State, name, styles, options};\n}\n\n/**\n * Defines a set of animation styles, associating each style with an optional `offset` value.\n *\n * @param steps A set of animation styles with optional offset data.\n * The optional `offset` value for a style specifies a percentage of the total animation\n * time at which that style is applied.\n * @returns An object that encapsulates the keyframes data.\n *\n * @usageNotes\n * Use with the `animate()` call. Instead of applying animations\n * from the current state\n * to the destination state, keyframes describe how each style entry is applied and at what point\n * within the animation arc.\n * Compare [CSS Keyframe Animations](https://www.w3schools.com/css/css3_animations.asp).\n *\n * ### Usage\n *\n * In the following example, the offset values describe\n * when each `backgroundColor` value is applied. The color is red at the start, and changes to\n * blue when 20% of the total time has elapsed.\n *\n * ```typescript\n * // the provided offset values\n * animate(\"5s\", keyframes([\n *   style({ backgroundColor: \"red\", offset: 0 }),\n *   style({ backgroundColor: \"blue\", offset: 0.2 }),\n *   style({ backgroundColor: \"orange\", offset: 0.3 }),\n *   style({ backgroundColor: \"black\", offset: 1 })\n * ]))\n * ```\n *\n * If there are no `offset` values specified in the style entries, the offsets\n * are calculated automatically.\n *\n * ```typescript\n * animate(\"5s\", keyframes([\n *   style({ backgroundColor: \"red\" }) // offset = 0\n *   style({ backgroundColor: \"blue\" }) // offset = 0.33\n *   style({ backgroundColor: \"orange\" }) // offset = 0.66\n *   style({ backgroundColor: \"black\" }) // offset = 1\n * ]))\n *```\n\n * @publicApi\n */\nexport function keyframes(steps: AnimationStyleMetadata[]): AnimationKeyframesSequenceMetadata {\n  return {type: AnimationMetadataType.Keyframes, steps};\n}\n\n/**\n * Declares an animation transition as a sequence of animation steps to run when a given\n * condition is satisfied. The condition is a Boolean expression or function that compares\n * the previous and current animation states, and returns true if this transition should occur.\n * When the state criteria of a defined transition are met, the associated animation is\n * triggered.\n *\n * @param stateChangeExpr A Boolean expression or function that compares the previous and current\n * animation states, and returns true if this transition should occur. Note that  \"true\" and \"false\"\n * match 1 and 0, respectively. An expression is evaluated each time a state change occurs in the\n * animation trigger element.\n * The animation steps run when the expression evaluates to true.\n *\n * - A state-change string takes the form \"state1 => state2\", where each side is a defined animation\n * state, or an asterix (*) to refer to a dynamic start or end state.\n *   - The expression string can contain multiple comma-separated statements;\n * for example \"state1 => state2, state3 => state4\".\n *   - Special values `:enter` and `:leave` initiate a transition on the entry and exit states,\n * equivalent to  \"void => *\"  and \"* => void\".\n *   - Special values `:increment` and `:decrement` initiate a transition when a numeric value has\n * increased or decreased in value.\n * - A function is executed each time a state change occurs in the animation trigger element.\n * The animation steps run when the function returns true.\n *\n * @param steps One or more animation objects, as returned by the `animate()` or\n * `sequence()` function, that form a transformation from one state to another.\n * A sequence is used by default when you pass an array.\n * @param options An options object that can contain a delay value for the start of the animation,\n * and additional developer-defined parameters. Provided values for additional parameters are used\n * as defaults, and override values can be passed to the caller on invocation.\n * @returns An object that encapsulates the transition data.\n *\n * @usageNotes\n * The template associated with a component binds an animation trigger to an element.\n *\n * ```HTML\n * <!-- somewhere inside of my-component-tpl.html -->\n * <div [@myAnimationTrigger]=\"myStatusExp\">...</div>\n * ```\n *\n * All transitions are defined within an animation trigger,\n * along with named states that the transitions change to and from.\n *\n * ```typescript\n * trigger(\"myAnimationTrigger\", [\n *  // define states\n *  state(\"on\", style({ background: \"green\" })),\n *  state(\"off\", style({ background: \"grey\" })),\n *  ...]\n * ```\n *\n * Note that when you call the `sequence()` function within a `{@link animations/group group()}`\n * or a `transition()` call, execution does not continue to the next instruction\n * until each of the inner animation steps have completed.\n *\n * ### Syntax examples\n *\n * The following examples define transitions between the two defined states (and default states),\n * using various options:\n *\n * ```typescript\n * // Transition occurs when the state value\n * // bound to \"myAnimationTrigger\" changes from \"on\" to \"off\"\n * transition(\"on => off\", animate(500))\n * // Run the same animation for both directions\n * transition(\"on <=> off\", animate(500))\n * // Define multiple state-change pairs separated by commas\n * transition(\"on => off, off => void\", animate(500))\n * ```\n *\n * ### Special values for state-change expressions\n *\n * - Catch-all state change for when an element is inserted into the page and the\n * destination state is unknown:\n *\n * ```typescript\n * transition(\"void => *\", [\n *  style({ opacity: 0 }),\n *  animate(500)\n *  ])\n * ```\n *\n * - Capture a state change between any states:\n *\n *  `transition(\"* => *\", animate(\"1s 0s\"))`\n *\n * - Entry and exit transitions:\n *\n * ```typescript\n * transition(\":enter\", [\n *   style({ opacity: 0 }),\n *   animate(500, style({ opacity: 1 }))\n *   ]),\n * transition(\":leave\", [\n *   animate(500, style({ opacity: 0 }))\n *   ])\n * ```\n *\n * - Use `:increment` and `:decrement` to initiate transitions:\n *\n * ```typescript\n * transition(\":increment\", group([\n *  query(':enter', [\n *     style({ left: '100%' }),\n *     animate('0.5s ease-out', style('*'))\n *   ]),\n *  query(':leave', [\n *     animate('0.5s ease-out', style({ left: '-100%' }))\n *  ])\n * ]))\n *\n * transition(\":decrement\", group([\n *  query(':enter', [\n *     style({ left: '100%' }),\n *     animate('0.5s ease-out', style('*'))\n *   ]),\n *  query(':leave', [\n *     animate('0.5s ease-out', style({ left: '-100%' }))\n *  ])\n * ]))\n * ```\n *\n * ### State-change functions\n *\n * Here is an example of a `fromState` specified as a state-change function that invokes an\n * animation when true:\n *\n * ```typescript\n * transition((fromState, toState) =>\n *  {\n *   return fromState == \"off\" && toState == \"on\";\n *  },\n *  animate(\"1s 0s\"))\n * ```\n *\n * ### Animating to the final state\n *\n * If the final step in a transition is a call to `animate()` that uses a timing value\n * with no style data, that step is automatically considered the final animation arc,\n * for the element to reach the final state. Angular automatically adds or removes\n * CSS styles to ensure that the element is in the correct final state.\n *\n * The following example defines a transition that starts by hiding the element,\n * then makes sure that it animates properly to whatever state is currently active for trigger:\n *\n * ```typescript\n * transition(\"void => *\", [\n *   style({ opacity: 0 }),\n *   animate(500)\n *  ])\n * ```\n * ### Boolean value matching\n * If a trigger binding value is a Boolean, it can be matched using a transition expression\n * that compares true and false or 1 and 0. For example:\n *\n * ```\n * // in the template\n * <div [@openClose]=\"open ? true : false\">...</div>\n * // in the component metadata\n * trigger('openClose', [\n *   state('true', style({ height: '*' })),\n *   state('false', style({ height: '0px' })),\n *   transition('false <=> true', animate(500))\n * ])\n * ```\n *\n * @publicApi\n **/\nexport function transition(\n    stateChangeExpr: string|\n    ((fromState: string, toState: string, element?: any, params?: {[key: string]: any}) => boolean),\n    steps: AnimationMetadata|AnimationMetadata[],\n    options: AnimationOptions|null = null): AnimationTransitionMetadata {\n  return {type: AnimationMetadataType.Transition, expr: stateChangeExpr, animation: steps, options};\n}\n\n/**\n * Produces a reusable animation that can be invoked in another animation or sequence,\n * by calling the `useAnimation()` function.\n *\n * @param steps One or more animation objects, as returned by the `animate()`\n * or `sequence()` function, that form a transformation from one state to another.\n * A sequence is used by default when you pass an array.\n * @param options An options object that can contain a delay value for the start of the\n * animation, and additional developer-defined parameters.\n * Provided values for additional parameters are used as defaults,\n * and override values can be passed to the caller on invocation.\n * @returns An object that encapsulates the animation data.\n *\n * @usageNotes\n * The following example defines a reusable animation, providing some default parameter\n * values.\n *\n * ```typescript\n * var fadeAnimation = animation([\n *   style({ opacity: '{{ start }}' }),\n *   animate('{{ time }}',\n *   style({ opacity: '{{ end }}'}))\n *   ],\n *   { params: { time: '1000ms', start: 0, end: 1 }});\n * ```\n *\n * The following invokes the defined animation with a call to `useAnimation()`,\n * passing in override parameter values.\n *\n * ```js\n * useAnimation(fadeAnimation, {\n *   params: {\n *     time: '2s',\n *     start: 1,\n *     end: 0\n *   }\n * })\n * ```\n *\n * If any of the passed-in parameter values are missing from this call,\n * the default values are used. If one or more parameter values are missing before a step is\n * animated, `useAnimation()` throws an error.\n *\n * @publicApi\n */\nexport function animation(\n    steps: AnimationMetadata|AnimationMetadata[],\n    options: AnimationOptions|null = null): AnimationReferenceMetadata {\n  return {type: AnimationMetadataType.Reference, animation: steps, options};\n}\n\n/**\n * Executes a queried inner animation element within an animation sequence.\n *\n * @param options An options object that can contain a delay value for the start of the\n * animation, and additional override values for developer-defined parameters.\n * @return An object that encapsulates the child animation data.\n *\n * @usageNotes\n * Each time an animation is triggered in Angular, the parent animation\n * has priority and any child animations are blocked. In order\n * for a child animation to run, the parent animation must query each of the elements\n * containing child animations, and run them using this function.\n *\n * Note that this feature is designed to be used with `query()` and it will only work\n * with animations that are assigned using the Angular animation library. CSS keyframes\n * and transitions are not handled by this API.\n *\n * @publicApi\n */\nexport function animateChild(options: AnimateChildOptions|null = null):\n    AnimationAnimateChildMetadata {\n  return {type: AnimationMetadataType.AnimateChild, options};\n}\n\n/**\n * Starts a reusable animation that is created using the `animation()` function.\n *\n * @param animation The reusable animation to start.\n * @param options An options object that can contain a delay value for the start of\n * the animation, and additional override values for developer-defined parameters.\n * @return An object that contains the animation parameters.\n *\n * @publicApi\n */\nexport function useAnimation(\n    animation: AnimationReferenceMetadata,\n    options: AnimationOptions|null = null): AnimationAnimateRefMetadata {\n  return {type: AnimationMetadataType.AnimateRef, animation, options};\n}\n\n/**\n * Finds one or more inner elements within the current element that is\n * being animated within a sequence. Use with `animate()`.\n *\n * @param selector The element to query, or a set of elements that contain Angular-specific\n * characteristics, specified with one or more of the following tokens.\n *  - `query(\":enter\")` or `query(\":leave\")` : Query for newly inserted/removed elements.\n *  - `query(\":animating\")` : Query all currently animating elements.\n *  - `query(\"@triggerName\")` : Query elements that contain an animation trigger.\n *  - `query(\"@*\")` : Query all elements that contain an animation triggers.\n *  - `query(\":self\")` : Include the current element into the animation sequence.\n *\n * @param animation One or more animation steps to apply to the queried element or elements.\n * An array is treated as an animation sequence.\n * @param options An options object. Use the 'limit' field to limit the total number of\n * items to collect.\n * @return An object that encapsulates the query data.\n *\n * @usageNotes\n * Tokens can be merged into a combined query selector string. For example:\n *\n * ```typescript\n *  query(':self, .record:enter, .record:leave, @subTrigger', [...])\n * ```\n *\n * The `query()` function collects multiple elements and works internally by using\n * `element.querySelectorAll`. Use the `limit` field of an options object to limit\n * the total number of items to be collected. For example:\n *\n * ```js\n * query('div', [\n *   animate(...),\n *   animate(...)\n * ], { limit: 1 })\n * ```\n *\n * By default, throws an error when zero items are found. Set the\n * `optional` flag to ignore this error. For example:\n *\n * ```js\n * query('.some-element-that-may-not-be-there', [\n *   animate(...),\n *   animate(...)\n * ], { optional: true })\n * ```\n *\n * ### Usage Example\n *\n * The following example queries for inner elements and animates them\n * individually using `animate()`.\n *\n * ```typescript\n * @Component({\n *   selector: 'inner',\n *   template: `\n *     <div [@queryAnimation]=\"exp\">\n *       <h1>Title</h1>\n *       <div class=\"content\">\n *         Blah blah blah\n *       </div>\n *     </div>\n *   `,\n *   animations: [\n *    trigger('queryAnimation', [\n *      transition('* => goAnimate', [\n *        // hide the inner elements\n *        query('h1', style({ opacity: 0 })),\n *        query('.content', style({ opacity: 0 })),\n *\n *        // animate the inner elements in, one by one\n *        query('h1', animate(1000, style({ opacity: 1 }))),\n *        query('.content', animate(1000, style({ opacity: 1 }))),\n *      ])\n *    ])\n *  ]\n * })\n * class Cmp {\n *   exp = '';\n *\n *   goAnimate() {\n *     this.exp = 'goAnimate';\n *   }\n * }\n * ```\n *\n * @publicApi\n */\nexport function query(\n    selector: string, animation: AnimationMetadata|AnimationMetadata[],\n    options: AnimationQueryOptions|null = null): AnimationQueryMetadata {\n  return {type: AnimationMetadataType.Query, selector, animation, options};\n}\n\n/**\n * Use within an animation `query()` call to issue a timing gap after\n * each queried item is animated.\n *\n * @param timings A delay value.\n * @param animation One ore more animation steps.\n * @returns An object that encapsulates the stagger data.\n *\n * @usageNotes\n * In the following example, a container element wraps a list of items stamped out\n * by an `ngFor`. The container element contains an animation trigger that will later be set\n * to query for each of the inner items.\n *\n * Each time items are added, the opacity fade-in animation runs,\n * and each removed item is faded out.\n * When either of these animations occur, the stagger effect is\n * applied after each item's animation is started.\n *\n * ```html\n * <!-- list.component.html -->\n * <button (click)=\"toggle()\">Show / Hide Items</button>\n * <hr />\n * <div [@listAnimation]=\"items.length\">\n *   <div *ngFor=\"let item of items\">\n *     {{ item }}\n *   </div>\n * </div>\n * ```\n *\n * Here is the component code:\n *\n * ```typescript\n * import {trigger, transition, style, animate, query, stagger} from '@angular/animations';\n * @Component({\n *   templateUrl: 'list.component.html',\n *   animations: [\n *     trigger('listAnimation', [\n *     ...\n *     ])\n *   ]\n * })\n * class ListComponent {\n *   items = [];\n *\n *   showItems() {\n *     this.items = [0,1,2,3,4];\n *   }\n *\n *   hideItems() {\n *     this.items = [];\n *   }\n *\n *   toggle() {\n *     this.items.length ? this.hideItems() : this.showItems();\n *    }\n *  }\n * ```\n *\n * Here is the animation trigger code:\n *\n * ```typescript\n * trigger('listAnimation', [\n *   transition('* => *', [ // each time the binding value changes\n *     query(':leave', [\n *       stagger(100, [\n *         animate('0.5s', style({ opacity: 0 }))\n *       ])\n *     ]),\n *     query(':enter', [\n *       style({ opacity: 0 }),\n *       stagger(100, [\n *         animate('0.5s', style({ opacity: 1 }))\n *       ])\n *     ])\n *   ])\n * ])\n * ```\n *\n * @publicApi\n */\nexport function stagger(timings: string|number, animation: AnimationMetadata|AnimationMetadata[]):\n    AnimationStaggerMetadata {\n  return {type: AnimationMetadataType.Stagger, timings, animation};\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nexport function scheduleMicroTask(cb: () => any) {\n  Promise.resolve(null).then(cb);\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {scheduleMicroTask} from '../util';\n\n/**\n * Provides programmatic control of a reusable animation sequence,\n * built using the `build()` method of `AnimationBuilder`. The `build()` method\n * returns a factory, whose `create()` method instantiates and initializes this interface.\n *\n * @see `AnimationBuilder`\n * @see `AnimationFactory`\n * @see `animate()`\n *\n * @publicApi\n */\nexport interface AnimationPlayer {\n  /**\n   * Provides a callback to invoke when the animation finishes.\n   * @param fn The callback function.\n   * @see `finish()`\n   */\n  onDone(fn: () => void): void;\n  /**\n   * Provides a callback to invoke when the animation starts.\n   * @param fn The callback function.\n   * @see `run()`\n   */\n  onStart(fn: () => void): void;\n  /**\n   * Provides a callback to invoke after the animation is destroyed.\n   * @param fn The callback function.\n   * @see `destroy()`\n   * @see `beforeDestroy()`\n   */\n  onDestroy(fn: () => void): void;\n  /**\n   * Initializes the animation.\n   */\n  init(): void;\n  /**\n   * Reports whether the animation has started.\n   * @returns True if the animation has started, false otherwise.\n   */\n  hasStarted(): boolean;\n  /**\n   * Runs the animation, invoking the `onStart()` callback.\n   */\n  play(): void;\n  /**\n   * Pauses the animation.\n   */\n  pause(): void;\n  /**\n   * Restarts the paused animation.\n   */\n  restart(): void;\n  /**\n   * Ends the animation, invoking the `onDone()` callback.\n   */\n  finish(): void;\n  /**\n   * Destroys the animation, after invoking the `beforeDestroy()` callback.\n   * Calls the `onDestroy()` callback when destruction is completed.\n   */\n  destroy(): void;\n  /**\n   * Resets the animation to its initial state.\n   */\n  reset(): void;\n  /**\n   * Sets the position of the animation.\n   * @param position A 0-based offset into the duration, in milliseconds.\n   */\n  setPosition(position: any /** TODO #9100 */): void;\n  /**\n   * Reports the current position of the animation.\n   * @returns A 0-based offset into the duration, in milliseconds.\n   */\n  getPosition(): number;\n  /**\n   * The parent of this player, if any.\n   */\n  parentPlayer: AnimationPlayer|null;\n  /**\n   * The total run time of the animation, in milliseconds.\n   */\n  readonly totalTime: number;\n  /**\n   * Provides a callback to invoke before the animation is destroyed.\n   */\n  beforeDestroy?: () => any;\n  /**\n   * @internal\n   * Internal\n   */\n  triggerCallback?: (phaseName: string) => void;\n  /**\n   * @internal\n   * Internal\n   */\n  disabled?: boolean;\n}\n\n/**\n * An empty programmatic controller for reusable animations.\n * Used internally when animations are disabled, to avoid\n * checking for the null case when an animation player is expected.\n *\n * @see `animate()`\n * @see `AnimationPlayer`\n * @see `GroupPlayer`\n *\n * @publicApi\n */\nexport class NoopAnimationPlayer implements AnimationPlayer {\n  private _onDoneFns: Function[] = [];\n  private _onStartFns: Function[] = [];\n  private _onDestroyFns: Function[] = [];\n  private _started = false;\n  private _destroyed = false;\n  private _finished = false;\n  public parentPlayer: AnimationPlayer|null = null;\n  public readonly totalTime: number;\n  constructor(duration: number = 0, delay: number = 0) {\n    this.totalTime = duration + delay;\n  }\n  private _onFinish() {\n    if (!this._finished) {\n      this._finished = true;\n      this._onDoneFns.forEach(fn => fn());\n      this._onDoneFns = [];\n    }\n  }\n  onStart(fn: () => void): void {\n    this._onStartFns.push(fn);\n  }\n  onDone(fn: () => void): void {\n    this._onDoneFns.push(fn);\n  }\n  onDestroy(fn: () => void): void {\n    this._onDestroyFns.push(fn);\n  }\n  hasStarted(): boolean {\n    return this._started;\n  }\n  init(): void {}\n  play(): void {\n    if (!this.hasStarted()) {\n      this._onStart();\n      this.triggerMicrotask();\n    }\n    this._started = true;\n  }\n\n  /** @internal */\n  triggerMicrotask() {\n    scheduleMicroTask(() => this._onFinish());\n  }\n\n  private _onStart() {\n    this._onStartFns.forEach(fn => fn());\n    this._onStartFns = [];\n  }\n\n  pause(): void {}\n  restart(): void {}\n  finish(): void {\n    this._onFinish();\n  }\n  destroy(): void {\n    if (!this._destroyed) {\n      this._destroyed = true;\n      if (!this.hasStarted()) {\n        this._onStart();\n      }\n      this.finish();\n      this._onDestroyFns.forEach(fn => fn());\n      this._onDestroyFns = [];\n    }\n  }\n  reset(): void {}\n  setPosition(position: number): void {}\n  getPosition(): number {\n    return 0;\n  }\n\n  /** @internal */\n  triggerCallback(phaseName: string): void {\n    const methods = phaseName == 'start' ? this._onStartFns : this._onDoneFns;\n    methods.forEach(fn => fn());\n    methods.length = 0;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {scheduleMicroTask} from '../util';\nimport {AnimationPlayer} from './animation_player';\n\n/**\n * A programmatic controller for a group of reusable animations.\n * Used internally to control animations.\n *\n * @see `AnimationPlayer`\n * @see `{@link animations/group group()}`\n *\n */\nexport class AnimationGroupPlayer implements AnimationPlayer {\n  private _onDoneFns: Function[] = [];\n  private _onStartFns: Function[] = [];\n  private _finished = false;\n  private _started = false;\n  private _destroyed = false;\n  private _onDestroyFns: Function[] = [];\n\n  public parentPlayer: AnimationPlayer|null = null;\n  public totalTime: number = 0;\n  public readonly players: AnimationPlayer[];\n\n  constructor(_players: AnimationPlayer[]) {\n    this.players = _players;\n    let doneCount = 0;\n    let destroyCount = 0;\n    let startCount = 0;\n    const total = this.players.length;\n\n    if (total == 0) {\n      scheduleMicroTask(() => this._onFinish());\n    } else {\n      this.players.forEach(player => {\n        player.onDone(() => {\n          if (++doneCount == total) {\n            this._onFinish();\n          }\n        });\n        player.onDestroy(() => {\n          if (++destroyCount == total) {\n            this._onDestroy();\n          }\n        });\n        player.onStart(() => {\n          if (++startCount == total) {\n            this._onStart();\n          }\n        });\n      });\n    }\n\n    this.totalTime = this.players.reduce((time, player) => Math.max(time, player.totalTime), 0);\n  }\n\n  private _onFinish() {\n    if (!this._finished) {\n      this._finished = true;\n      this._onDoneFns.forEach(fn => fn());\n      this._onDoneFns = [];\n    }\n  }\n\n  init(): void {\n    this.players.forEach(player => player.init());\n  }\n\n  onStart(fn: () => void): void {\n    this._onStartFns.push(fn);\n  }\n\n  private _onStart() {\n    if (!this.hasStarted()) {\n      this._started = true;\n      this._onStartFns.forEach(fn => fn());\n      this._onStartFns = [];\n    }\n  }\n\n  onDone(fn: () => void): void {\n    this._onDoneFns.push(fn);\n  }\n\n  onDestroy(fn: () => void): void {\n    this._onDestroyFns.push(fn);\n  }\n\n  hasStarted() {\n    return this._started;\n  }\n\n  play() {\n    if (!this.parentPlayer) {\n      this.init();\n    }\n    this._onStart();\n    this.players.forEach(player => player.play());\n  }\n\n  pause(): void {\n    this.players.forEach(player => player.pause());\n  }\n\n  restart(): void {\n    this.players.forEach(player => player.restart());\n  }\n\n  finish(): void {\n    this._onFinish();\n    this.players.forEach(player => player.finish());\n  }\n\n  destroy(): void {\n    this._onDestroy();\n  }\n\n  private _onDestroy() {\n    if (!this._destroyed) {\n      this._destroyed = true;\n      this._onFinish();\n      this.players.forEach(player => player.destroy());\n      this._onDestroyFns.forEach(fn => fn());\n      this._onDestroyFns = [];\n    }\n  }\n\n  reset(): void {\n    this.players.forEach(player => player.reset());\n    this._destroyed = false;\n    this._finished = false;\n    this._started = false;\n  }\n\n  setPosition(p: number): void {\n    const timeAtPosition = p * this.totalTime;\n    this.players.forEach(player => {\n      const position = player.totalTime ? Math.min(1, timeAtPosition / player.totalTime) : 1;\n      player.setPosition(position);\n    });\n  }\n\n  getPosition(): number {\n    let min = 0;\n    this.players.forEach(player => {\n      const p = player.getPosition();\n      min = Math.min(p, min);\n    });\n    return min;\n  }\n\n  beforeDestroy(): void {\n    this.players.forEach(player => {\n      if (player.beforeDestroy) {\n        player.beforeDestroy();\n      }\n    });\n  }\n\n  /** @internal */\n  triggerCallback(phaseName: string): void {\n    const methods = phaseName == 'start' ? this._onStartFns : this._onDoneFns;\n    methods.forEach(fn => fn());\n    methods.length = 0;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nexport {AnimationGroupPlayer as ɵAnimationGroupPlayer} from './players/animation_group_player';\nexport const ɵPRE_STYLE = '!';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @module\n * @description\n * Entry point for all animation APIs of the animation package.\n */\nexport {AnimationBuilder, AnimationFactory} from './animation_builder';\nexport {AnimationEvent} from './animation_event';\nexport {animate, animateChild, AnimateChildOptions, AnimateTimings, animation, AnimationAnimateChildMetadata, AnimationAnimateMetadata, AnimationAnimateRefMetadata, AnimationGroupMetadata, AnimationKeyframesSequenceMetadata, AnimationMetadata, AnimationMetadataType, AnimationOptions, AnimationQueryMetadata, AnimationQueryOptions, AnimationReferenceMetadata, AnimationSequenceMetadata, AnimationStaggerMetadata, AnimationStateMetadata, AnimationStyleMetadata, AnimationTransitionMetadata, AnimationTriggerMetadata, AUTO_STYLE, group, keyframes, query, sequence, stagger, state, style, transition, trigger, useAnimation, ɵStyleData} from './animation_metadata';\nexport {AnimationPlayer, NoopAnimationPlayer} from './players/animation_player';\n\nexport * from './private_export';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @module\n * @description\n * Entry point for all public APIs of this package.\n */\nexport * from './src/animations';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n// This file is not used to build this module. It is only used during editing\n// by the TypeScript language service and during build for verification. `ngc`\n// replaces this file with production index.ts when it rewrites private symbol\n// names.\n\nexport * from './public_api';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './index';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {AnimationBuilder, AnimationFactory, AnimationMetadata, AnimationOptions, AnimationPlayer, sequence} from '@angular/animations';\nimport {DOCUMENT} from '@angular/common';\nimport {Inject, Injectable, RendererFactory2, RendererType2, ViewEncapsulation} from '@angular/core';\n\nimport {AnimationRenderer} from './animation_renderer';\n\n@Injectable()\nexport class BrowserAnimationBuilder extends AnimationBuilder {\n  private _nextAnimationId = 0;\n  private _renderer: AnimationRenderer;\n\n  constructor(rootRenderer: RendererFactory2, @Inject(DOCUMENT) doc: any) {\n    super();\n    const typeData =\n        {id: '0', encapsulation: ViewEncapsulation.None, styles: [], data: {animation: []}} as\n        RendererType2;\n    this._renderer = rootRenderer.createRenderer(doc.body, typeData) as AnimationRenderer;\n  }\n\n  build(animation: AnimationMetadata|AnimationMetadata[]): AnimationFactory {\n    const id = this._nextAnimationId.toString();\n    this._nextAnimationId++;\n    const entry = Array.isArray(animation) ? sequence(animation) : animation;\n    issueAnimationCommand(this._renderer, null, id, 'register', [entry]);\n    return new BrowserAnimationFactory(id, this._renderer);\n  }\n}\n\nexport class BrowserAnimationFactory extends AnimationFactory {\n  constructor(private _id: string, private _renderer: AnimationRenderer) {\n    super();\n  }\n\n  create(element: any, options?: AnimationOptions): AnimationPlayer {\n    return new RendererAnimationPlayer(this._id, element, options || {}, this._renderer);\n  }\n}\n\nexport class RendererAnimationPlayer implements AnimationPlayer {\n  public parentPlayer: AnimationPlayer|null = null;\n  private _started = false;\n\n  constructor(\n      public id: string, public element: any, options: AnimationOptions,\n      private _renderer: AnimationRenderer) {\n    this._command('create', options);\n  }\n\n  private _listen(eventName: string, callback: (event: any) => any): () => void {\n    return this._renderer.listen(this.element, `@@${this.id}:${eventName}`, callback);\n  }\n\n  private _command(command: string, ...args: any[]) {\n    return issueAnimationCommand(this._renderer, this.element, this.id, command, args);\n  }\n\n  onDone(fn: () => void): void {\n    this._listen('done', fn);\n  }\n\n  onStart(fn: () => void): void {\n    this._listen('start', fn);\n  }\n\n  onDestroy(fn: () => void): void {\n    this._listen('destroy', fn);\n  }\n\n  init(): void {\n    this._command('init');\n  }\n\n  hasStarted(): boolean {\n    return this._started;\n  }\n\n  play(): void {\n    this._command('play');\n    this._started = true;\n  }\n\n  pause(): void {\n    this._command('pause');\n  }\n\n  restart(): void {\n    this._command('restart');\n  }\n\n  finish(): void {\n    this._command('finish');\n  }\n\n  destroy(): void {\n    this._command('destroy');\n  }\n\n  reset(): void {\n    this._command('reset');\n  }\n\n  setPosition(p: number): void {\n    this._command('setPosition', p);\n  }\n\n  getPosition(): number {\n    return 0;\n  }\n\n  public totalTime = 0;\n}\n\nfunction issueAnimationCommand(\n    renderer: AnimationRenderer, element: any, id: string, command: string, args: any[]): any {\n  return renderer.setProperty(element, `@@${id}:${command}`, args);\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {AnimationTriggerMetadata} from '@angular/animations';\nimport {ɵAnimationEngine as AnimationEngine} from '@angular/animations/browser';\nimport {Injectable, NgZone, Renderer2, RendererFactory2, RendererStyleFlags2, RendererType2} from '@angular/core';\n\nconst ANIMATION_PREFIX = '@';\nconst DISABLE_ANIMATIONS_FLAG = '@.disabled';\n\n// Define a recursive type to allow for nested arrays of `AnimationTriggerMetadata`. Note that an\n// interface declaration is used as TypeScript prior to 3.7 does not support recursive type\n// references, see https://github.com/microsoft/TypeScript/pull/33050 for details.\ntype NestedAnimationTriggerMetadata = AnimationTriggerMetadata|RecursiveAnimationTriggerMetadata;\ninterface RecursiveAnimationTriggerMetadata extends Array<NestedAnimationTriggerMetadata> {}\n\n@Injectable()\nexport class AnimationRendererFactory implements RendererFactory2 {\n  private _currentId: number = 0;\n  private _microtaskId: number = 1;\n  private _animationCallbacksBuffer: [(e: any) => any, any][] = [];\n  private _rendererCache = new Map<Renderer2, BaseAnimationRenderer>();\n  private _cdRecurDepth = 0;\n  private promise: Promise<any> = Promise.resolve(0);\n\n  constructor(\n      private delegate: RendererFactory2, private engine: AnimationEngine, private _zone: NgZone) {\n    engine.onRemovalComplete = (element: any, delegate: Renderer2) => {\n      // Note: if an component element has a leave animation, and the component\n      // a host leave animation, the view engine will call `removeChild` for the parent\n      // component renderer as well as for the child component renderer.\n      // Therefore, we need to check if we already removed the element.\n      if (delegate && delegate.parentNode(element)) {\n        delegate.removeChild(element.parentNode, element);\n      }\n    };\n  }\n\n  createRenderer(hostElement: any, type: RendererType2): Renderer2 {\n    const EMPTY_NAMESPACE_ID = '';\n\n    // cache the delegates to find out which cached delegate can\n    // be used by which cached renderer\n    const delegate = this.delegate.createRenderer(hostElement, type);\n    if (!hostElement || !type || !type.data || !type.data['animation']) {\n      let renderer: BaseAnimationRenderer|undefined = this._rendererCache.get(delegate);\n      if (!renderer) {\n        renderer = new BaseAnimationRenderer(EMPTY_NAMESPACE_ID, delegate, this.engine);\n        // only cache this result when the base renderer is used\n        this._rendererCache.set(delegate, renderer);\n      }\n      return renderer;\n    }\n\n    const componentId = type.id;\n    const namespaceId = type.id + '-' + this._currentId;\n    this._currentId++;\n\n    this.engine.register(namespaceId, hostElement);\n\n    const registerTrigger = (trigger: NestedAnimationTriggerMetadata) => {\n      if (Array.isArray(trigger)) {\n        trigger.forEach(registerTrigger);\n      } else {\n        this.engine.registerTrigger(componentId, namespaceId, hostElement, trigger.name, trigger);\n      }\n    };\n    const animationTriggers = type.data['animation'] as NestedAnimationTriggerMetadata[];\n    animationTriggers.forEach(registerTrigger);\n\n    return new AnimationRenderer(this, namespaceId, delegate, this.engine);\n  }\n\n  begin() {\n    this._cdRecurDepth++;\n    if (this.delegate.begin) {\n      this.delegate.begin();\n    }\n  }\n\n  private _scheduleCountTask() {\n    // always use promise to schedule microtask instead of use Zone\n    this.promise.then(() => {\n      this._microtaskId++;\n    });\n  }\n\n  /** @internal */\n  scheduleListenerCallback(count: number, fn: (e: any) => any, data: any) {\n    if (count >= 0 && count < this._microtaskId) {\n      this._zone.run(() => fn(data));\n      return;\n    }\n\n    if (this._animationCallbacksBuffer.length == 0) {\n      Promise.resolve(null).then(() => {\n        this._zone.run(() => {\n          this._animationCallbacksBuffer.forEach(tuple => {\n            const [fn, data] = tuple;\n            fn(data);\n          });\n          this._animationCallbacksBuffer = [];\n        });\n      });\n    }\n\n    this._animationCallbacksBuffer.push([fn, data]);\n  }\n\n  end() {\n    this._cdRecurDepth--;\n\n    // this is to prevent animations from running twice when an inner\n    // component does CD when a parent component instead has inserted it\n    if (this._cdRecurDepth == 0) {\n      this._zone.runOutsideAngular(() => {\n        this._scheduleCountTask();\n        this.engine.flush(this._microtaskId);\n      });\n    }\n    if (this.delegate.end) {\n      this.delegate.end();\n    }\n  }\n\n  whenRenderingDone(): Promise<any> {\n    return this.engine.whenRenderingDone();\n  }\n}\n\nexport class BaseAnimationRenderer implements Renderer2 {\n  constructor(\n      protected namespaceId: string, public delegate: Renderer2, public engine: AnimationEngine) {\n    this.destroyNode = this.delegate.destroyNode ? (n) => delegate.destroyNode!(n) : null;\n  }\n\n  get data() {\n    return this.delegate.data;\n  }\n\n  destroyNode: ((n: any) => void)|null;\n\n  destroy(): void {\n    this.engine.destroy(this.namespaceId, this.delegate);\n    this.delegate.destroy();\n  }\n\n  createElement(name: string, namespace?: string|null|undefined) {\n    return this.delegate.createElement(name, namespace);\n  }\n\n  createComment(value: string) {\n    return this.delegate.createComment(value);\n  }\n\n  createText(value: string) {\n    return this.delegate.createText(value);\n  }\n\n  appendChild(parent: any, newChild: any): void {\n    this.delegate.appendChild(parent, newChild);\n    this.engine.onInsert(this.namespaceId, newChild, parent, false);\n  }\n\n  insertBefore(parent: any, newChild: any, refChild: any): void {\n    this.delegate.insertBefore(parent, newChild, refChild);\n    this.engine.onInsert(this.namespaceId, newChild, parent, true);\n  }\n\n  removeChild(parent: any, oldChild: any, isHostElement: boolean): void {\n    this.engine.onRemove(this.namespaceId, oldChild, this.delegate, isHostElement);\n  }\n\n  selectRootElement(selectorOrNode: any, preserveContent?: boolean) {\n    return this.delegate.selectRootElement(selectorOrNode, preserveContent);\n  }\n\n  parentNode(node: any) {\n    return this.delegate.parentNode(node);\n  }\n\n  nextSibling(node: any) {\n    return this.delegate.nextSibling(node);\n  }\n\n  setAttribute(el: any, name: string, value: string, namespace?: string|null|undefined): void {\n    this.delegate.setAttribute(el, name, value, namespace);\n  }\n\n  removeAttribute(el: any, name: string, namespace?: string|null|undefined): void {\n    this.delegate.removeAttribute(el, name, namespace);\n  }\n\n  addClass(el: any, name: string): void {\n    this.delegate.addClass(el, name);\n  }\n\n  removeClass(el: any, name: string): void {\n    this.delegate.removeClass(el, name);\n  }\n\n  setStyle(el: any, style: string, value: any, flags?: RendererStyleFlags2|undefined): void {\n    this.delegate.setStyle(el, style, value, flags);\n  }\n\n  removeStyle(el: any, style: string, flags?: RendererStyleFlags2|undefined): void {\n    this.delegate.removeStyle(el, style, flags);\n  }\n\n  setProperty(el: any, name: string, value: any): void {\n    if (name.charAt(0) == ANIMATION_PREFIX && name == DISABLE_ANIMATIONS_FLAG) {\n      this.disableAnimations(el, !!value);\n    } else {\n      this.delegate.setProperty(el, name, value);\n    }\n  }\n\n  setValue(node: any, value: string): void {\n    this.delegate.setValue(node, value);\n  }\n\n  listen(target: any, eventName: string, callback: (event: any) => boolean | void): () => void {\n    return this.delegate.listen(target, eventName, callback);\n  }\n\n  protected disableAnimations(element: any, value: boolean) {\n    this.engine.disableAnimations(element, value);\n  }\n}\n\nexport class AnimationRenderer extends BaseAnimationRenderer implements Renderer2 {\n  constructor(\n      public factory: AnimationRendererFactory, namespaceId: string, delegate: Renderer2,\n      engine: AnimationEngine) {\n    super(namespaceId, delegate, engine);\n    this.namespaceId = namespaceId;\n  }\n\n  setProperty(el: any, name: string, value: any): void {\n    if (name.charAt(0) == ANIMATION_PREFIX) {\n      if (name.charAt(1) == '.' && name == DISABLE_ANIMATIONS_FLAG) {\n        value = value === undefined ? true : !!value;\n        this.disableAnimations(el, value as boolean);\n      } else {\n        this.engine.process(this.namespaceId, el, name.substr(1), value);\n      }\n    } else {\n      this.delegate.setProperty(el, name, value);\n    }\n  }\n\n  listen(target: 'window'|'document'|'body'|any, eventName: string, callback: (event: any) => any):\n      () => void {\n    if (eventName.charAt(0) == ANIMATION_PREFIX) {\n      const element = resolveElementFromTarget(target);\n      let name = eventName.substr(1);\n      let phase = '';\n      // @listener.phase is for trigger animation callbacks\n      // @@listener is for animation builder callbacks\n      if (name.charAt(0) != ANIMATION_PREFIX) {\n        [name, phase] = parseTriggerCallbackName(name);\n      }\n      return this.engine.listen(this.namespaceId, element, name, phase, event => {\n        const countId = (event as any)['_data'] || -1;\n        this.factory.scheduleListenerCallback(countId, callback, event);\n      });\n    }\n    return this.delegate.listen(target, eventName, callback);\n  }\n}\n\nfunction resolveElementFromTarget(target: 'window'|'document'|'body'|any): any {\n  switch (target) {\n    case 'body':\n      return document.body;\n    case 'document':\n      return document;\n    case 'window':\n      return window;\n    default:\n      return target;\n  }\n}\n\nfunction parseTriggerCallbackName(triggerName: string) {\n  const dotIndex = triggerName.indexOf('.');\n  const trigger = triggerName.substring(0, dotIndex);\n  const phase = triggerName.substr(dotIndex + 1);\n  return [trigger, phase];\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {AnimationBuilder} from '@angular/animations';\nimport {AnimationDriver, ɵAnimationEngine as AnimationEngine, ɵAnimationStyleNormalizer as AnimationStyleNormalizer, ɵCssKeyframesDriver as CssKeyframesDriver, ɵNoopAnimationDriver as NoopAnimationDriver, ɵsupportsWebAnimations as supportsWebAnimations, ɵWebAnimationsDriver as WebAnimationsDriver, ɵWebAnimationsStyleNormalizer as WebAnimationsStyleNormalizer} from '@angular/animations/browser';\nimport {DOCUMENT} from '@angular/common';\nimport {Inject, Injectable, InjectionToken, NgZone, Provider, RendererFactory2} from '@angular/core';\nimport {ɵDomRendererFactory2 as DomRendererFactory2} from '@angular/platform-browser';\n\nimport {BrowserAnimationBuilder} from './animation_builder';\nimport {AnimationRendererFactory} from './animation_renderer';\n\n@Injectable()\nexport class InjectableAnimationEngine extends AnimationEngine {\n  constructor(\n      @Inject(DOCUMENT) doc: any, driver: AnimationDriver, normalizer: AnimationStyleNormalizer) {\n    super(doc.body, driver, normalizer);\n  }\n}\n\nexport function instantiateSupportedAnimationDriver() {\n  return supportsWebAnimations() ? new WebAnimationsDriver() : new CssKeyframesDriver();\n}\n\nexport function instantiateDefaultStyleNormalizer() {\n  return new WebAnimationsStyleNormalizer();\n}\n\nexport function instantiateRendererFactory(\n    renderer: DomRendererFactory2, engine: AnimationEngine, zone: NgZone) {\n  return new AnimationRendererFactory(renderer, engine, zone);\n}\n\n/**\n * @publicApi\n */\nexport const ANIMATION_MODULE_TYPE =\n    new InjectionToken<'NoopAnimations'|'BrowserAnimations'>('AnimationModuleType');\n\nconst SHARED_ANIMATION_PROVIDERS: Provider[] = [\n  {provide: AnimationBuilder, useClass: BrowserAnimationBuilder},\n  {provide: AnimationStyleNormalizer, useFactory: instantiateDefaultStyleNormalizer},\n  {provide: AnimationEngine, useClass: InjectableAnimationEngine}, {\n    provide: RendererFactory2,\n    useFactory: instantiateRendererFactory,\n    deps: [DomRendererFactory2, AnimationEngine, NgZone]\n  }\n];\n\n/**\n * Separate providers from the actual module so that we can do a local modification in Google3 to\n * include them in the BrowserModule.\n */\nexport const BROWSER_ANIMATIONS_PROVIDERS: Provider[] = [\n  {provide: AnimationDriver, useFactory: instantiateSupportedAnimationDriver},\n  {provide: ANIMATION_MODULE_TYPE, useValue: 'BrowserAnimations'}, ...SHARED_ANIMATION_PROVIDERS\n];\n\n/**\n * Separate providers from the actual module so that we can do a local modification in Google3 to\n * include them in the BrowserTestingModule.\n */\nexport const BROWSER_NOOP_ANIMATIONS_PROVIDERS: Provider[] = [\n  {provide: AnimationDriver, useClass: NoopAnimationDriver},\n  {provide: ANIMATION_MODULE_TYPE, useValue: 'NoopAnimations'}, ...SHARED_ANIMATION_PROVIDERS\n];\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {NgModule} from '@angular/core';\nimport {BrowserModule} from '@angular/platform-browser';\n\nimport {BROWSER_ANIMATIONS_PROVIDERS, BROWSER_NOOP_ANIMATIONS_PROVIDERS} from './providers';\n\n/**\n * Exports `BrowserModule` with additional [dependency-injection providers](guide/glossary#provider)\n * for use with animations. See [Animations](guide/animations).\n * @publicApi\n */\n@NgModule({\n  exports: [BrowserModule],\n  providers: BROWSER_ANIMATIONS_PROVIDERS,\n})\nexport class BrowserAnimationsModule {\n}\n\n/**\n * A null player that must be imported to allow disabling of animations.\n * @publicApi\n */\n@NgModule({\n  exports: [BrowserModule],\n  providers: BROWSER_NOOP_ANIMATIONS_PROVIDERS,\n})\nexport class NoopAnimationsModule {\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nexport {BrowserAnimationBuilder as ɵBrowserAnimationBuilder, BrowserAnimationFactory as ɵBrowserAnimationFactory} from './animation_builder';\nexport {AnimationRenderer as ɵAnimationRenderer, AnimationRendererFactory as ɵAnimationRendererFactory} from './animation_renderer';\nexport {InjectableAnimationEngine as ɵInjectableAnimationEngine} from './providers';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @module\n * @description\n * Entry point for all animation APIs of the animation browser package.\n */\nexport {BrowserAnimationsModule, NoopAnimationsModule} from './module';\n\nexport {ANIMATION_MODULE_TYPE} from './providers';\n\nexport * from './private_export';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @module\n * @description\n * Entry point for all public APIs of this package.\n */\nexport * from './src/animations';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n// This file is not used to build this module. It is only used during editing\n// by the TypeScript language service and during build for verifcation. `ngc`\n// replaces this file with production index.ts when it rewrites private symbol\n// names.\n\nexport * from './public_api';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './index';\n\nexport {BaseAnimationRenderer as ɵangular_packages_platform_browser_animations_animations_f} from './src/animation_renderer';\nexport {BROWSER_ANIMATIONS_PROVIDERS as ɵangular_packages_platform_browser_animations_animations_d,BROWSER_NOOP_ANIMATIONS_PROVIDERS as ɵangular_packages_platform_browser_animations_animations_e,instantiateDefaultStyleNormalizer as ɵangular_packages_platform_browser_animations_animations_b,instantiateRendererFactory as ɵangular_packages_platform_browser_animations_animations_c,instantiateSupportedAnimationDriver as ɵangular_packages_platform_browser_animations_animations_a} from './src/providers';","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar isEmpty_1 = require(\"../../operator/isEmpty\");\nrxjs_1.Observable.prototype.isEmpty = isEmpty_1.isEmpty;\n//# sourceMappingURL=isEmpty.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/* tslint:enable:max-line-length */\n/**\n * Emits only the first value (or the first value that meets some condition)\n * emitted by the source Observable.\n *\n * <span class=\"informal\">Emits only the first value. Or emits only the first\n * value that passes some test.</span>\n *\n * <img src=\"./img/first.png\" width=\"100%\">\n *\n * If called with no arguments, `first` emits the first value of the source\n * Observable, then completes. If called with a `predicate` function, `first`\n * emits the first value of the source that matches the specified condition. It\n * may also take a `resultSelector` function to produce the output value from\n * the input value, and a `defaultValue` to emit in case the source completes\n * before it is able to emit a valid value. Throws an error if `defaultValue`\n * was not provided and a matching element is not found.\n *\n * @example <caption>Emit only the first click that happens on the DOM</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.first();\n * result.subscribe(x => console.log(x));\n *\n * @example <caption>Emits the first click that happens on a DIV</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.first(ev => ev.target.tagName === 'DIV');\n * result.subscribe(x => console.log(x));\n *\n * @see {@link filter}\n * @see {@link find}\n * @see {@link take}\n *\n * @throws {EmptyError} Delivers an EmptyError to the Observer's `error`\n * callback if the Observable completes before any `next` notification was sent.\n *\n * @param {function(value: T, index: number, source: Observable<T>): boolean} [predicate]\n * An optional function called with each item to test for condition matching.\n * @param {T} [defaultValue] The default value emitted in case no valid value\n * was found on the source.\n * @return {Observable<T>} An Observable of the first item that matches the\n * condition.\n * @method first\n * @owner Observable\n */\nfunction first() {\n    var args = [];\n    for (var _i = 0; _i < arguments.length; _i++) {\n        args[_i] = arguments[_i];\n    }\n    return operators_1.first.apply(void 0, args)(this);\n}\nexports.first = first;\n//# sourceMappingURL=first.js.map","import setPrototypeOf from \"./setPrototypeOf\";\nimport isNativeReflectConstruct from \"./isNativeReflectConstruct\";\nexport default function _construct(Parent, args, Class) {\n  if (isNativeReflectConstruct()) {\n    _construct = Reflect.construct;\n  } else {\n    _construct = function _construct(Parent, args, Class) {\n      var a = [null];\n      a.push.apply(a, args);\n      var Constructor = Function.bind.apply(Parent, a);\n      var instance = new Constructor();\n      if (Class) setPrototypeOf(instance, Class.prototype);\n      return instance;\n    };\n  }\n\n  return _construct.apply(null, arguments);\n}","var arrayWithoutHoles = require(\"./arrayWithoutHoles\");\n\nvar iterableToArray = require(\"./iterableToArray\");\n\nvar unsupportedIterableToArray = require(\"./unsupportedIterableToArray\");\n\nvar nonIterableSpread = require(\"./nonIterableSpread\");\n\nfunction _toConsumableArray(arr) {\n  return arrayWithoutHoles(arr) || iterableToArray(arr) || unsupportedIterableToArray(arr) || nonIterableSpread();\n}\n\nmodule.exports = _toConsumableArray;","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar concatMapTo_1 = require(\"../../operator/concatMapTo\");\nrxjs_1.Observable.prototype.concatMapTo = concatMapTo_1.concatMapTo;\n//# sourceMappingURL=concatMapTo.js.map","import { AsyncScheduler } from './AsyncScheduler';\nexport class AsapScheduler extends AsyncScheduler {\n    flush(action) {\n        this.active = true;\n        this.scheduled = undefined;\n        const { actions } = this;\n        let error;\n        let index = -1;\n        let count = actions.length;\n        action = action || actions.shift();\n        do {\n            if (error = action.execute(action.state, action.delay)) {\n                break;\n            }\n        } while (++index < count && (action = actions.shift()));\n        this.active = false;\n        if (error) {\n            while (++index < count && (action = actions.shift())) {\n                action.unsubscribe();\n            }\n            throw error;\n        }\n    }\n}\n//# sourceMappingURL=AsapScheduler.js.map","import superPropBase from \"./superPropBase\";\nexport default function _get(target, property, receiver) {\n  if (typeof Reflect !== \"undefined\" && Reflect.get) {\n    _get = Reflect.get;\n  } else {\n    _get = function _get(target, property, receiver) {\n      var base = superPropBase(target, property);\n      if (!base) return;\n      var desc = Object.getOwnPropertyDescriptor(base, property);\n\n      if (desc.get) {\n        return desc.get.call(receiver);\n      }\n\n      return desc.value;\n    };\n  }\n\n  return _get(target, property, receiver || target);\n}","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.interval = rxjs_1.interval;\n//# sourceMappingURL=interval.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport{\n  trigger,\n  state,\n  style,\n  animate,\n  transition,\n  query,\n  group,\n  AnimationTriggerMetadata,\n} from '@angular/animations';\n\n/**\n * Animations used by the mat-menu component.\n * Animation duration and timing values are based on:\n * https://material.io/guidelines/components/menus.html#menus-usage\n * @docs-private\n */\nexport const matMenuAnimations: {\n  readonly transformMenu: AnimationTriggerMetadata;\n  readonly fadeInItems: AnimationTriggerMetadata;\n} = {\n  /**\n   * This animation controls the menu panel's entry and exit from the page.\n   *\n   * When the menu panel is added to the DOM, it scales in and fades in its border.\n   *\n   * When the menu panel is removed from the DOM, it simply fades out after a brief\n   * delay to display the ripple.\n   */\n  transformMenu: trigger('transformMenu', [\n    state('void', style({\n      opacity: 0,\n      transform: 'scale(0.8)'\n    })),\n    transition('void => enter', group([\n      query('.mat-menu-content, .mat-mdc-menu-content', animate('100ms linear', style({\n        opacity: 1\n      }))),\n      animate('120ms cubic-bezier(0, 0, 0.2, 1)', style({transform: 'scale(1)'})),\n    ])),\n    transition('* => void', animate('100ms 25ms linear', style({opacity: 0})))\n  ]),\n\n\n  /**\n   * This animation fades in the background color and content of the menu panel\n   * after its containing element is scaled in.\n   */\n  fadeInItems: trigger('fadeInItems', [\n    // TODO(crisbeto): this is inside the `transformMenu`\n    // now. Remove next time we do breaking changes.\n    state('showing', style({opacity: 1})),\n    transition('void => *', [\n      style({opacity: 0}),\n      animate('400ms 100ms cubic-bezier(0.55, 0, 0.55, 0.2)')\n    ])\n  ])\n};\n\n/**\n * @deprecated\n * @breaking-change 8.0.0\n * @docs-private\n */\nexport const fadeInItems = matMenuAnimations.fadeInItems;\n\n/**\n * @deprecated\n * @breaking-change 8.0.0\n * @docs-private\n */\nexport const transformMenu = matMenuAnimations.transformMenu;\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DomPortalOutlet, TemplatePortal} from '@angular/cdk/portal';\nimport {DOCUMENT} from '@angular/common';\nimport {\n  ApplicationRef,\n  ChangeDetectorRef,\n  ComponentFactoryResolver,\n  Directive,\n  Inject,\n  InjectionToken,\n  Injector,\n  OnDestroy,\n  TemplateRef,\n  ViewContainerRef,\n} from '@angular/core';\nimport {Subject} from 'rxjs';\n\n/**\n * Injection token that can be used to reference instances of `MatMenuContent`. It serves\n * as alternative token to the actual `MatMenuContent` class which could cause unnecessary\n * retention of the class and its directive metadata.\n */\nexport const MAT_MENU_CONTENT = new InjectionToken<MatMenuContent>('MatMenuContent');\n\n/**\n * Menu content that will be rendered lazily once the menu is opened.\n */\n@Directive({\n  selector: 'ng-template[matMenuContent]',\n  providers: [{provide: MAT_MENU_CONTENT, useExisting: MatMenuContent}],\n})\nexport class MatMenuContent implements OnDestroy {\n  private _portal: TemplatePortal<any>;\n  private _outlet: DomPortalOutlet;\n\n  /** Emits when the menu content has been attached. */\n  _attached = new Subject<void>();\n\n  constructor(\n    private _template: TemplateRef<any>,\n    private _componentFactoryResolver: ComponentFactoryResolver,\n    private _appRef: ApplicationRef,\n    private _injector: Injector,\n    private _viewContainerRef: ViewContainerRef,\n    @Inject(DOCUMENT) private _document: any,\n    private _changeDetectorRef?: ChangeDetectorRef) {}\n\n  /**\n   * Attaches the content with a particular context.\n   * @docs-private\n   */\n  attach(context: any = {}) {\n    if (!this._portal) {\n      this._portal = new TemplatePortal(this._template, this._viewContainerRef);\n    }\n\n    this.detach();\n\n    if (!this._outlet) {\n      this._outlet = new DomPortalOutlet(this._document.createElement('div'),\n          this._componentFactoryResolver, this._appRef, this._injector);\n    }\n\n    const element: HTMLElement = this._template.elementRef.nativeElement;\n\n    // Because we support opening the same menu from different triggers (which in turn have their\n    // own `OverlayRef` panel), we have to re-insert the host element every time, otherwise we\n    // risk it staying attached to a pane that's no longer in the DOM.\n    element.parentNode!.insertBefore(this._outlet.outletElement, element);\n\n    // When `MatMenuContent` is used in an `OnPush` component, the insertion of the menu\n    // content via `createEmbeddedView` does not cause the content to be seen as \"dirty\"\n    // by Angular. This causes the `@ContentChildren` for menu items within the menu to\n    // not be updated by Angular. By explicitly marking for check here, we tell Angular that\n    // it needs to check for new menu items and update the `@ContentChild` in `MatMenu`.\n    // @breaking-change 9.0.0 Make change detector ref required\n    if (this._changeDetectorRef) {\n      this._changeDetectorRef.markForCheck();\n    }\n\n    this._portal.attach(this._outlet, context);\n    this._attached.next();\n  }\n\n  /**\n   * Detaches the content.\n   * @docs-private\n   */\n  detach() {\n    if (this._portal.isAttached) {\n      this._portal.detach();\n    }\n  }\n\n  ngOnDestroy() {\n    if (this._outlet) {\n      this._outlet.dispose();\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * Throws an exception for the case when menu trigger doesn't have a valid mat-menu instance\n * @docs-private\n */\nexport function throwMatMenuMissingError() {\n  throw Error(`matMenuTriggerFor: must pass in an mat-menu instance.\n\n    Example:\n      <mat-menu #menu=\"matMenu\"></mat-menu>\n      <button [matMenuTriggerFor]=\"menu\"></button>`);\n}\n\n/**\n * Throws an exception for the case when menu's x-position value isn't valid.\n * In other words, it doesn't match 'before' or 'after'.\n * @docs-private\n */\nexport function throwMatMenuInvalidPositionX() {\n  throw Error(`xPosition value must be either 'before' or after'.\n      Example: <mat-menu xPosition=\"before\" #menu=\"matMenu\"></mat-menu>`);\n}\n\n/**\n * Throws an exception for the case when menu's y-position value isn't valid.\n * In other words, it doesn't match 'above' or 'below'.\n * @docs-private\n */\nexport function throwMatMenuInvalidPositionY() {\n  throw Error(`yPosition value must be either 'above' or below'.\n      Example: <mat-menu yPosition=\"above\" #menu=\"matMenu\"></mat-menu>`);\n}\n\n\n/**\n * Throws an exception for the case when a menu is assigned\n * to a trigger that is placed inside the same menu.\n * @docs-private\n */\nexport function throwMatMenuRecursiveError() {\n  throw Error(`matMenuTriggerFor: menu cannot contain its own trigger. Assign a menu that is ` +\n              `not a parent of the trigger or move the trigger outside of the menu.`);\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {EventEmitter, TemplateRef, InjectionToken} from '@angular/core';\nimport {MenuPositionX, MenuPositionY} from './menu-positions';\nimport {Direction} from '@angular/cdk/bidi';\nimport {FocusOrigin} from '@angular/cdk/a11y';\nimport {MatMenuContent} from './menu-content';\n\n/**\n * Injection token used to provide the parent menu to menu-specific components.\n * @docs-private\n */\nexport const MAT_MENU_PANEL = new InjectionToken<MatMenuPanel>('MAT_MENU_PANEL');\n\n/**\n * Interface for a custom menu panel that can be used with `matMenuTriggerFor`.\n * @docs-private\n */\nexport interface MatMenuPanel<T = any> {\n  xPosition: MenuPositionX;\n  yPosition: MenuPositionY;\n  overlapTrigger: boolean;\n  templateRef: TemplateRef<any>;\n  close: EventEmitter<void | 'click' | 'keydown' | 'tab'>;\n  parentMenu?: MatMenuPanel | undefined;\n  direction?: Direction;\n  focusFirstItem: (origin?: FocusOrigin) => void;\n  resetActiveItem: () => void;\n  setPositionClasses?: (x: MenuPositionX, y: MenuPositionY) => void;\n  setElevation?(depth: number): void;\n  lazyContent?: MatMenuContent;\n  backdropClass?: string;\n  overlayPanelClass?: string|string[];\n  hasBackdrop?: boolean;\n  readonly panelId?: string;\n\n  /**\n   * @deprecated To be removed.\n   * @breaking-change 8.0.0\n   */\n  addItem?: (item: T) => void;\n\n  /**\n   * @deprecated To be removed.\n   * @breaking-change 8.0.0\n   */\n  removeItem?: (item: T) => void;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {FocusableOption, FocusMonitor, FocusOrigin} from '@angular/cdk/a11y';\nimport {BooleanInput} from '@angular/cdk/coercion';\nimport {\n  ChangeDetectionStrategy,\n  Component,\n  ElementRef,\n  OnDestroy,\n  ViewEncapsulation,\n  Inject,\n  Optional,\n  Input,\n  HostListener,\n  AfterViewInit,\n} from '@angular/core';\nimport {\n  CanDisable, CanDisableCtor,\n  CanDisableRipple, CanDisableRippleCtor,\n  mixinDisabled,\n  mixinDisableRipple,\n} from '@angular/material/core';\nimport {Subject} from 'rxjs';\nimport {DOCUMENT} from '@angular/common';\nimport {MAT_MENU_PANEL, MatMenuPanel} from './menu-panel';\n\n// Boilerplate for applying mixins to MatMenuItem.\n/** @docs-private */\nclass MatMenuItemBase {}\nconst _MatMenuItemMixinBase: CanDisableRippleCtor & CanDisableCtor & typeof MatMenuItemBase =\n    mixinDisableRipple(mixinDisabled(MatMenuItemBase));\n\n/**\n * Single item inside of a `mat-menu`. Provides the menu item styling and accessibility treatment.\n */\n@Component({\n  selector: '[mat-menu-item]',\n  exportAs: 'matMenuItem',\n  inputs: ['disabled', 'disableRipple'],\n  host: {\n    '[attr.role]': 'role',\n    '[class.mat-menu-item]': 'true',\n    '[class.mat-menu-item-highlighted]': '_highlighted',\n    '[class.mat-menu-item-submenu-trigger]': '_triggersSubmenu',\n    '[attr.tabindex]': '_getTabIndex()',\n    '[attr.aria-disabled]': 'disabled.toString()',\n    '[attr.disabled]': 'disabled || null',\n    'class': 'mat-focus-indicator',\n  },\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  encapsulation: ViewEncapsulation.None,\n  templateUrl: 'menu-item.html',\n})\nexport class MatMenuItem extends _MatMenuItemMixinBase\n    implements FocusableOption, CanDisable, CanDisableRipple, AfterViewInit, OnDestroy {\n\n  /** ARIA role for the menu item. */\n  @Input() role: 'menuitem' | 'menuitemradio' | 'menuitemcheckbox' = 'menuitem';\n\n  private _document: Document;\n\n  /** Stream that emits when the menu item is hovered. */\n  readonly _hovered: Subject<MatMenuItem> = new Subject<MatMenuItem>();\n\n  /** Stream that emits when the menu item is focused. */\n  readonly _focused = new Subject<MatMenuItem>();\n\n  /** Whether the menu item is highlighted. */\n  _highlighted: boolean = false;\n\n  /** Whether the menu item acts as a trigger for a sub-menu. */\n  _triggersSubmenu: boolean = false;\n\n  constructor(\n    private _elementRef: ElementRef<HTMLElement>,\n    @Inject(DOCUMENT) document?: any,\n    private _focusMonitor?: FocusMonitor,\n    @Inject(MAT_MENU_PANEL) @Optional() public _parentMenu?: MatMenuPanel<MatMenuItem>) {\n\n    // @breaking-change 8.0.0 make `_focusMonitor` and `document` required params.\n    super();\n\n    if (_parentMenu && _parentMenu.addItem) {\n      _parentMenu.addItem(this);\n    }\n\n    this._document = document;\n  }\n\n  /** Focuses the menu item. */\n  focus(origin: FocusOrigin = 'program', options?: FocusOptions): void {\n    if (this._focusMonitor) {\n      this._focusMonitor.focusVia(this._getHostElement(), origin, options);\n    } else {\n      this._getHostElement().focus(options);\n    }\n\n    this._focused.next(this);\n  }\n\n  ngAfterViewInit() {\n    if (this._focusMonitor) {\n      // Start monitoring the element so it gets the appropriate focused classes. We want\n      // to show the focus style for menu items only when the focus was not caused by a\n      // mouse or touch interaction.\n      this._focusMonitor.monitor(this._elementRef, false);\n    }\n  }\n\n  ngOnDestroy() {\n    if (this._focusMonitor) {\n      this._focusMonitor.stopMonitoring(this._elementRef);\n    }\n\n    if (this._parentMenu && this._parentMenu.removeItem) {\n      this._parentMenu.removeItem(this);\n    }\n\n    this._hovered.complete();\n    this._focused.complete();\n  }\n\n  /** Used to set the `tabindex`. */\n  _getTabIndex(): string {\n    return this.disabled ? '-1' : '0';\n  }\n\n  /** Returns the host DOM element. */\n  _getHostElement(): HTMLElement {\n    return this._elementRef.nativeElement;\n  }\n\n  /** Prevents the default element actions if it is disabled. */\n  // We have to use a `HostListener` here in order to support both Ivy and ViewEngine.\n  // In Ivy the `host` bindings will be merged when this class is extended, whereas in\n  // ViewEngine they're overwritten.\n  // TODO(crisbeto): we move this back into `host` once Ivy is turned on by default.\n  // tslint:disable-next-line:no-host-decorator-in-concrete\n  @HostListener('click', ['$event'])\n  _checkDisabled(event: Event): void {\n    if (this.disabled) {\n      event.preventDefault();\n      event.stopPropagation();\n    }\n  }\n\n  /** Emits to the hover stream. */\n  // We have to use a `HostListener` here in order to support both Ivy and ViewEngine.\n  // In Ivy the `host` bindings will be merged when this class is extended, whereas in\n  // ViewEngine they're overwritten.\n  // TODO(crisbeto): we move this back into `host` once Ivy is turned on by default.\n  // tslint:disable-next-line:no-host-decorator-in-concrete\n  @HostListener('mouseenter')\n  _handleMouseEnter() {\n    this._hovered.next(this);\n  }\n\n  /** Gets the label to be used when determining whether the option should be focused. */\n  getLabel(): string {\n    const element: HTMLElement = this._elementRef.nativeElement;\n    const textNodeType = this._document ? this._document.TEXT_NODE : 3;\n    let output = '';\n\n    if (element.childNodes) {\n      const length = element.childNodes.length;\n\n      // Go through all the top-level text nodes and extract their text.\n      // We skip anything that's not a text node to prevent the text from\n      // being thrown off by something like an icon.\n      for (let i = 0; i < length; i++) {\n        if (element.childNodes[i].nodeType === textNodeType) {\n          output += element.childNodes[i].textContent;\n        }\n      }\n    }\n\n    return output.trim();\n  }\n\n  static ngAcceptInputType_disabled: BooleanInput;\n  static ngAcceptInputType_disableRipple: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {FocusKeyManager, FocusOrigin} from '@angular/cdk/a11y';\nimport {Direction} from '@angular/cdk/bidi';\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {\n  ESCAPE,\n  LEFT_ARROW,\n  RIGHT_ARROW,\n  DOWN_ARROW,\n  UP_ARROW,\n  hasModifierKey,\n} from '@angular/cdk/keycodes';\nimport {\n  AfterContentInit,\n  ChangeDetectionStrategy,\n  Component,\n  ContentChild,\n  ContentChildren,\n  Directive,\n  ElementRef,\n  EventEmitter,\n  Inject,\n  InjectionToken,\n  Input,\n  NgZone,\n  OnDestroy,\n  Output,\n  TemplateRef,\n  QueryList,\n  ViewChild,\n  ViewEncapsulation,\n  OnInit,\n} from '@angular/core';\nimport {merge, Observable, Subject, Subscription} from 'rxjs';\nimport {startWith, switchMap, take} from 'rxjs/operators';\nimport {matMenuAnimations} from './menu-animations';\nimport {MAT_MENU_CONTENT, MatMenuContent} from './menu-content';\nimport {MenuPositionX, MenuPositionY} from './menu-positions';\nimport {throwMatMenuInvalidPositionX, throwMatMenuInvalidPositionY} from './menu-errors';\nimport {MatMenuItem} from './menu-item';\nimport {MAT_MENU_PANEL, MatMenuPanel} from './menu-panel';\nimport {AnimationEvent} from '@angular/animations';\n\n/** Default `mat-menu` options that can be overridden. */\nexport interface MatMenuDefaultOptions {\n  /** The x-axis position of the menu. */\n  xPosition: MenuPositionX;\n\n  /** The y-axis position of the menu. */\n  yPosition: MenuPositionY;\n\n  /** Whether the menu should overlap the menu trigger. */\n  overlapTrigger: boolean;\n\n  /** Class to be applied to the menu's backdrop. */\n  backdropClass: string;\n\n  /** Class or list of classes to be applied to the menu's overlay panel. */\n  overlayPanelClass?: string | string[];\n\n  /** Whether the menu has a backdrop. */\n  hasBackdrop?: boolean;\n}\n\n/** Injection token to be used to override the default options for `mat-menu`. */\nexport const MAT_MENU_DEFAULT_OPTIONS =\n    new InjectionToken<MatMenuDefaultOptions>('mat-menu-default-options', {\n      providedIn: 'root',\n      factory: MAT_MENU_DEFAULT_OPTIONS_FACTORY\n    });\n\n/** @docs-private */\nexport function MAT_MENU_DEFAULT_OPTIONS_FACTORY(): MatMenuDefaultOptions {\n  return {\n    overlapTrigger: false,\n    xPosition: 'after',\n    yPosition: 'below',\n    backdropClass: 'cdk-overlay-transparent-backdrop',\n  };\n}\n/**\n * Start elevation for the menu panel.\n * @docs-private\n */\nconst MAT_MENU_BASE_ELEVATION = 4;\n\nlet menuPanelUid = 0;\n\n/** Base class with all of the `MatMenu` functionality. */\n@Directive()\nexport class _MatMenuBase implements AfterContentInit, MatMenuPanel<MatMenuItem>, OnInit,\n  OnDestroy {\n  private _keyManager: FocusKeyManager<MatMenuItem>;\n  private _xPosition: MenuPositionX = this._defaultOptions.xPosition;\n  private _yPosition: MenuPositionY = this._defaultOptions.yPosition;\n  private _previousElevation: string;\n\n  /** All items inside the menu. Includes items nested inside another menu. */\n  @ContentChildren(MatMenuItem, {descendants: true}) _allItems: QueryList<MatMenuItem>;\n\n  /** Only the direct descendant menu items. */\n  private _directDescendantItems = new QueryList<MatMenuItem>();\n\n  /** Subscription to tab events on the menu panel */\n  private _tabSubscription = Subscription.EMPTY;\n\n  /** Config object to be passed into the menu's ngClass */\n  _classList: {[key: string]: boolean} = {};\n\n  /** Current state of the panel animation. */\n  _panelAnimationState: 'void' | 'enter' = 'void';\n\n  /** Emits whenever an animation on the menu completes. */\n  _animationDone = new Subject<AnimationEvent>();\n\n  /** Whether the menu is animating. */\n  _isAnimating: boolean;\n\n  /** Parent menu of the current menu panel. */\n  parentMenu: MatMenuPanel | undefined;\n\n  /** Layout direction of the menu. */\n  direction: Direction;\n\n  /** Class or list of classes to be added to the overlay panel. */\n  overlayPanelClass: string|string[] = this._defaultOptions.overlayPanelClass || '';\n\n  /** Class to be added to the backdrop element. */\n  @Input() backdropClass: string = this._defaultOptions.backdropClass;\n\n  /** aria-label for the menu panel. */\n  @Input('aria-label') ariaLabel: string;\n\n  /** aria-labelledby for the menu panel. */\n  @Input('aria-labelledby') ariaLabelledby: string;\n\n  /** aria-describedby for the menu panel. */\n  @Input('aria-describedby') ariaDescribedby: string;\n\n  /** Position of the menu in the X axis. */\n  @Input()\n  get xPosition(): MenuPositionX { return this._xPosition; }\n  set xPosition(value: MenuPositionX) {\n    if (value !== 'before' && value !== 'after' &&\n      (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throwMatMenuInvalidPositionX();\n    }\n    this._xPosition = value;\n    this.setPositionClasses();\n  }\n\n  /** Position of the menu in the Y axis. */\n  @Input()\n  get yPosition(): MenuPositionY { return this._yPosition; }\n  set yPosition(value: MenuPositionY) {\n    if (value !== 'above' && value !== 'below' && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throwMatMenuInvalidPositionY();\n    }\n    this._yPosition = value;\n    this.setPositionClasses();\n  }\n\n  /** @docs-private */\n  @ViewChild(TemplateRef) templateRef: TemplateRef<any>;\n\n  /**\n   * List of the items inside of a menu.\n   * @deprecated\n   * @breaking-change 8.0.0\n   */\n  @ContentChildren(MatMenuItem, {descendants: false}) items: QueryList<MatMenuItem>;\n\n  /**\n   * Menu content that will be rendered lazily.\n   * @docs-private\n   */\n  @ContentChild(MAT_MENU_CONTENT) lazyContent: MatMenuContent;\n\n  /** Whether the menu should overlap its trigger. */\n  @Input()\n  get overlapTrigger(): boolean { return this._overlapTrigger; }\n  set overlapTrigger(value: boolean) {\n    this._overlapTrigger = coerceBooleanProperty(value);\n  }\n  private _overlapTrigger: boolean = this._defaultOptions.overlapTrigger;\n\n  /** Whether the menu has a backdrop. */\n  @Input()\n  get hasBackdrop(): boolean | undefined { return this._hasBackdrop; }\n  set hasBackdrop(value: boolean | undefined) {\n    this._hasBackdrop = coerceBooleanProperty(value);\n  }\n  private _hasBackdrop: boolean | undefined = this._defaultOptions.hasBackdrop;\n\n  /**\n   * This method takes classes set on the host mat-menu element and applies them on the\n   * menu template that displays in the overlay container.  Otherwise, it's difficult\n   * to style the containing menu from outside the component.\n   * @param classes list of class names\n   */\n  @Input('class')\n  set panelClass(classes: string) {\n    const previousPanelClass = this._previousPanelClass;\n\n    if (previousPanelClass && previousPanelClass.length) {\n      previousPanelClass.split(' ').forEach((className: string) => {\n        this._classList[className] = false;\n      });\n    }\n\n    this._previousPanelClass = classes;\n\n    if (classes && classes.length) {\n      classes.split(' ').forEach((className: string) => {\n        this._classList[className] = true;\n      });\n\n      this._elementRef.nativeElement.className = '';\n    }\n  }\n  private _previousPanelClass: string;\n\n  /**\n   * This method takes classes set on the host mat-menu element and applies them on the\n   * menu template that displays in the overlay container.  Otherwise, it's difficult\n   * to style the containing menu from outside the component.\n   * @deprecated Use `panelClass` instead.\n   * @breaking-change 8.0.0\n   */\n  @Input()\n  get classList(): string { return this.panelClass; }\n  set classList(classes: string) { this.panelClass = classes; }\n\n  /** Event emitted when the menu is closed. */\n  @Output() readonly closed: EventEmitter<void | 'click' | 'keydown' | 'tab'> =\n      new EventEmitter<void | 'click' | 'keydown' | 'tab'>();\n\n  /**\n   * Event emitted when the menu is closed.\n   * @deprecated Switch to `closed` instead\n   * @breaking-change 8.0.0\n   */\n  @Output() close: EventEmitter<void | 'click' | 'keydown' | 'tab'> = this.closed;\n\n  readonly panelId = `mat-menu-panel-${menuPanelUid++}`;\n\n  constructor(\n    private _elementRef: ElementRef<HTMLElement>,\n    private _ngZone: NgZone,\n    @Inject(MAT_MENU_DEFAULT_OPTIONS) private _defaultOptions: MatMenuDefaultOptions) { }\n\n  ngOnInit() {\n    this.setPositionClasses();\n  }\n\n  ngAfterContentInit() {\n    this._updateDirectDescendants();\n    this._keyManager = new FocusKeyManager(this._directDescendantItems)\n      .withWrap()\n      .withTypeAhead()\n      .withHomeAndEnd();\n    this._tabSubscription = this._keyManager.tabOut.subscribe(() => this.closed.emit('tab'));\n\n    // If a user manually (programatically) focuses a menu item, we need to reflect that focus\n    // change back to the key manager. Note that we don't need to unsubscribe here because _focused\n    // is internal and we know that it gets completed on destroy.\n    this._directDescendantItems.changes.pipe(\n      startWith(this._directDescendantItems),\n      switchMap(items => merge<MatMenuItem>(...items.map((item: MatMenuItem) => item._focused)))\n    ).subscribe(focusedItem => this._keyManager.updateActiveItem(focusedItem));\n  }\n\n  ngOnDestroy() {\n    this._directDescendantItems.destroy();\n    this._tabSubscription.unsubscribe();\n    this.closed.complete();\n  }\n\n  /** Stream that emits whenever the hovered menu item changes. */\n  _hovered(): Observable<MatMenuItem> {\n    // Coerce the `changes` property because Angular types it as `Observable<any>`\n    const itemChanges = this._directDescendantItems.changes as Observable<QueryList<MatMenuItem>>;\n    return itemChanges.pipe(\n      startWith(this._directDescendantItems),\n      switchMap(items => merge(...items.map((item: MatMenuItem) => item._hovered)))\n    ) as Observable<MatMenuItem>;\n  }\n\n  /*\n   * Registers a menu item with the menu.\n   * @docs-private\n   * @deprecated No longer being used. To be removed.\n   * @breaking-change 9.0.0\n   */\n  addItem(_item: MatMenuItem) {}\n\n  /**\n   * Removes an item from the menu.\n   * @docs-private\n   * @deprecated No longer being used. To be removed.\n   * @breaking-change 9.0.0\n   */\n  removeItem(_item: MatMenuItem) {}\n\n  /** Handle a keyboard event from the menu, delegating to the appropriate action. */\n  _handleKeydown(event: KeyboardEvent) {\n    const keyCode = event.keyCode;\n    const manager = this._keyManager;\n\n    switch (keyCode) {\n      case ESCAPE:\n        if (!hasModifierKey(event)) {\n          event.preventDefault();\n          this.closed.emit('keydown');\n        }\n      break;\n      case LEFT_ARROW:\n        if (this.parentMenu && this.direction === 'ltr') {\n          this.closed.emit('keydown');\n        }\n      break;\n      case RIGHT_ARROW:\n        if (this.parentMenu && this.direction === 'rtl') {\n          this.closed.emit('keydown');\n        }\n      break;\n      default:\n        if (keyCode === UP_ARROW || keyCode === DOWN_ARROW) {\n          manager.setFocusOrigin('keyboard');\n        }\n\n        manager.onKeydown(event);\n    }\n  }\n\n  /**\n   * Focus the first item in the menu.\n   * @param origin Action from which the focus originated. Used to set the correct styling.\n   */\n  focusFirstItem(origin: FocusOrigin = 'program'): void {\n    // When the content is rendered lazily, it takes a bit before the items are inside the DOM.\n    if (this.lazyContent) {\n      this._ngZone.onStable\n        .pipe(take(1))\n        .subscribe(() => this._focusFirstItem(origin));\n    } else {\n      this._focusFirstItem(origin);\n    }\n  }\n\n  /**\n   * Actual implementation that focuses the first item. Needs to be separated\n   * out so we don't repeat the same logic in the public `focusFirstItem` method.\n   */\n  private _focusFirstItem(origin: FocusOrigin) {\n    const manager = this._keyManager;\n\n    manager.setFocusOrigin(origin).setFirstItemActive();\n\n    // If there's no active item at this point, it means that all the items are disabled.\n    // Move focus to the menu panel so keyboard events like Escape still work. Also this will\n    // give _some_ feedback to screen readers.\n    if (!manager.activeItem && this._directDescendantItems.length) {\n      let element = this._directDescendantItems.first._getHostElement().parentElement;\n\n      // Because the `mat-menu` is at the DOM insertion point, not inside the overlay, we don't\n      // have a nice way of getting a hold of the menu panel. We can't use a `ViewChild` either\n      // because the panel is inside an `ng-template`. We work around it by starting from one of\n      // the items and walking up the DOM.\n      while (element) {\n        if (element.getAttribute('role') === 'menu') {\n          element.focus();\n          break;\n        } else {\n          element = element.parentElement;\n        }\n      }\n    }\n  }\n\n  /**\n   * Resets the active item in the menu. This is used when the menu is opened, allowing\n   * the user to start from the first option when pressing the down arrow.\n   */\n  resetActiveItem() {\n    this._keyManager.setActiveItem(-1);\n  }\n\n  /**\n   * Sets the menu panel elevation.\n   * @param depth Number of parent menus that come before the menu.\n   */\n  setElevation(depth: number): void {\n    // The elevation starts at the base and increases by one for each level.\n    // Capped at 24 because that's the maximum elevation defined in the Material design spec.\n    const elevation = Math.min(MAT_MENU_BASE_ELEVATION + depth, 24);\n    const newElevation = `mat-elevation-z${elevation}`;\n    const customElevation = Object.keys(this._classList).find(c => c.startsWith('mat-elevation-z'));\n\n    if (!customElevation || customElevation === this._previousElevation) {\n      if (this._previousElevation) {\n        this._classList[this._previousElevation] = false;\n      }\n\n      this._classList[newElevation] = true;\n      this._previousElevation = newElevation;\n    }\n  }\n\n  /**\n   * Adds classes to the menu panel based on its position. Can be used by\n   * consumers to add specific styling based on the position.\n   * @param posX Position of the menu along the x axis.\n   * @param posY Position of the menu along the y axis.\n   * @docs-private\n   */\n  setPositionClasses(posX: MenuPositionX = this.xPosition, posY: MenuPositionY = this.yPosition) {\n    const classes = this._classList;\n    classes['mat-menu-before'] = posX === 'before';\n    classes['mat-menu-after'] = posX === 'after';\n    classes['mat-menu-above'] = posY === 'above';\n    classes['mat-menu-below'] = posY === 'below';\n  }\n\n  /** Starts the enter animation. */\n  _startAnimation() {\n    // @breaking-change 8.0.0 Combine with _resetAnimation.\n    this._panelAnimationState = 'enter';\n  }\n\n  /** Resets the panel animation to its initial state. */\n  _resetAnimation() {\n    // @breaking-change 8.0.0 Combine with _startAnimation.\n    this._panelAnimationState = 'void';\n  }\n\n  /** Callback that is invoked when the panel animation completes. */\n  _onAnimationDone(event: AnimationEvent) {\n    this._animationDone.next(event);\n    this._isAnimating = false;\n  }\n\n  _onAnimationStart(event: AnimationEvent) {\n    this._isAnimating = true;\n\n    // Scroll the content element to the top as soon as the animation starts. This is necessary,\n    // because we move focus to the first item while it's still being animated, which can throw\n    // the browser off when it determines the scroll position. Alternatively we can move focus\n    // when the animation is done, however moving focus asynchronously will interrupt screen\n    // readers which are in the process of reading out the menu already. We take the `element`\n    // from the `event` since we can't use a `ViewChild` to access the pane.\n    if (event.toState === 'enter' && this._keyManager.activeItemIndex === 0) {\n      event.element.scrollTop = 0;\n    }\n  }\n\n  /**\n   * Sets up a stream that will keep track of any newly-added menu items and will update the list\n   * of direct descendants. We collect the descendants this way, because `_allItems` can include\n   * items that are part of child menus, and using a custom way of registering items is unreliable\n   * when it comes to maintaining the item order.\n   */\n  private _updateDirectDescendants() {\n    this._allItems.changes\n      .pipe(startWith(this._allItems))\n      .subscribe((items: QueryList<MatMenuItem>) => {\n        this._directDescendantItems.reset(items.filter(item => item._parentMenu === this));\n        this._directDescendantItems.notifyOnChanges();\n      });\n  }\n\n  static ngAcceptInputType_overlapTrigger: BooleanInput;\n  static ngAcceptInputType_hasBackdrop: BooleanInput;\n}\n\n/** @docs-private We show the \"_MatMenu\" class as \"MatMenu\" in the docs. */\n@Directive()\nexport class MatMenu extends _MatMenuBase {}\n\n// Note on the weird inheritance setup: we need three classes, because the MDC-based menu has to\n// extend `MatMenu`, however keeping a reference to it will cause the inlined template and styles\n// to be retained as well. The MDC menu also has to provide itself as a `MatMenu` in order for\n// queries and DI to work correctly, while still not referencing the actual menu class.\n// Class responsibility is split up as follows:\n// * _MatMenuBase - provides all the functionality without any of the Angular metadata.\n// * MatMenu - keeps the same name symbol name as the current menu and\n// is used as a provider for DI and query purposes.\n// * _MatMenu - the actual menu component implementation with the Angular metadata that should\n// be tree shaken away for MDC.\n\n/** @docs-public MatMenu */\n@Component({\n  selector: 'mat-menu',\n  templateUrl: 'menu.html',\n  styleUrls: ['menu.css'],\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  encapsulation: ViewEncapsulation.None,\n  exportAs: 'matMenu',\n  animations: [\n    matMenuAnimations.transformMenu,\n    matMenuAnimations.fadeInItems\n  ],\n  providers: [\n    {provide: MAT_MENU_PANEL, useExisting: MatMenu},\n    {provide: MatMenu, useExisting: _MatMenu}\n  ]\n})\nexport class _MatMenu extends MatMenu {\n  constructor(elementRef: ElementRef<HTMLElement>, ngZone: NgZone,\n      @Inject(MAT_MENU_DEFAULT_OPTIONS) defaultOptions: MatMenuDefaultOptions) {\n    super(elementRef, ngZone, defaultOptions);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {FocusMonitor, FocusOrigin, isFakeMousedownFromScreenReader} from '@angular/cdk/a11y';\nimport {Direction, Directionality} from '@angular/cdk/bidi';\nimport {LEFT_ARROW, RIGHT_ARROW} from '@angular/cdk/keycodes';\nimport {\n  FlexibleConnectedPositionStrategy,\n  HorizontalConnectionPos,\n  Overlay,\n  OverlayConfig,\n  OverlayRef,\n  VerticalConnectionPos,\n  ScrollStrategy,\n} from '@angular/cdk/overlay';\nimport {TemplatePortal} from '@angular/cdk/portal';\nimport {\n  AfterContentInit,\n  Directive,\n  ElementRef,\n  EventEmitter,\n  Inject,\n  InjectionToken,\n  Input,\n  OnDestroy,\n  Optional,\n  Output,\n  Self,\n  ViewContainerRef,\n} from '@angular/core';\nimport {normalizePassiveListenerOptions} from '@angular/cdk/platform';\nimport {asapScheduler, merge, of as observableOf, Subscription} from 'rxjs';\nimport {delay, filter, take, takeUntil} from 'rxjs/operators';\nimport {MatMenu} from './menu';\nimport {throwMatMenuMissingError, throwMatMenuRecursiveError} from './menu-errors';\nimport {MatMenuItem} from './menu-item';\nimport {MatMenuPanel} from './menu-panel';\nimport {MenuPositionX, MenuPositionY} from './menu-positions';\n\n/** Injection token that determines the scroll handling while the menu is open. */\nexport const MAT_MENU_SCROLL_STRATEGY =\n    new InjectionToken<() => ScrollStrategy>('mat-menu-scroll-strategy');\n\n/** @docs-private */\nexport function MAT_MENU_SCROLL_STRATEGY_FACTORY(overlay: Overlay): () => ScrollStrategy {\n  return () => overlay.scrollStrategies.reposition();\n}\n\n/** @docs-private */\nexport const MAT_MENU_SCROLL_STRATEGY_FACTORY_PROVIDER = {\n  provide: MAT_MENU_SCROLL_STRATEGY,\n  deps: [Overlay],\n  useFactory: MAT_MENU_SCROLL_STRATEGY_FACTORY,\n};\n\n/** Default top padding of the menu panel. */\nexport const MENU_PANEL_TOP_PADDING = 8;\n\n/** Options for binding a passive event listener. */\nconst passiveEventListenerOptions = normalizePassiveListenerOptions({passive: true});\n\n// TODO(andrewseguin): Remove the kebab versions in favor of camelCased attribute selectors\n\n/** Directive applied to an element that should trigger a `mat-menu`. */\n@Directive({\n  selector: `[mat-menu-trigger-for], [matMenuTriggerFor]`,\n  host: {\n    'class': 'mat-menu-trigger',\n    'aria-haspopup': 'true',\n    '[attr.aria-expanded]': 'menuOpen || null',\n    '[attr.aria-controls]': 'menuOpen ? menu.panelId : null',\n    '(mousedown)': '_handleMousedown($event)',\n    '(keydown)': '_handleKeydown($event)',\n    '(click)': '_handleClick($event)',\n  },\n  exportAs: 'matMenuTrigger'\n})\nexport class MatMenuTrigger implements AfterContentInit, OnDestroy {\n  private _portal: TemplatePortal;\n  private _overlayRef: OverlayRef | null = null;\n  private _menuOpen: boolean = false;\n  private _closingActionsSubscription = Subscription.EMPTY;\n  private _hoverSubscription = Subscription.EMPTY;\n  private _menuCloseSubscription = Subscription.EMPTY;\n  private _scrollStrategy: () => ScrollStrategy;\n\n  /**\n   * Handles touch start events on the trigger.\n   * Needs to be an arrow function so we can easily use addEventListener and removeEventListener.\n   */\n  private _handleTouchStart = () => this._openedBy = 'touch';\n\n  // Tracking input type is necessary so it's possible to only auto-focus\n  // the first item of the list when the menu is opened via the keyboard\n  _openedBy: 'mouse' | 'touch' | null = null;\n\n  /**\n   * @deprecated\n   * @breaking-change 8.0.0\n   */\n  @Input('mat-menu-trigger-for')\n  get _deprecatedMatMenuTriggerFor(): MatMenuPanel { return this.menu; }\n  set _deprecatedMatMenuTriggerFor(v: MatMenuPanel) {\n    this.menu = v;\n  }\n\n  /** References the menu instance that the trigger is associated with. */\n  @Input('matMenuTriggerFor')\n  get menu() { return this._menu; }\n  set menu(menu: MatMenuPanel) {\n    if (menu === this._menu) {\n      return;\n    }\n\n    this._menu = menu;\n    this._menuCloseSubscription.unsubscribe();\n\n    if (menu) {\n      if (menu === this._parentMenu && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n        throwMatMenuRecursiveError();\n      }\n\n      this._menuCloseSubscription = menu.close.subscribe(\n        (reason: 'click' | 'tab' | 'keydown' | undefined) => {\n          this._destroyMenu();\n\n          // If a click closed the menu, we should close the entire chain of nested menus.\n          if ((reason === 'click' || reason === 'tab') && this._parentMenu) {\n            this._parentMenu.closed.emit(reason);\n          }\n        });\n    }\n  }\n  private _menu: MatMenuPanel;\n\n  /** Data to be passed along to any lazily-rendered content. */\n  @Input('matMenuTriggerData') menuData: any;\n\n  /**\n   * Whether focus should be restored when the menu is closed.\n   * Note that disabling this option can have accessibility implications\n   * and it's up to you to manage focus, if you decide to turn it off.\n   */\n  @Input('matMenuTriggerRestoreFocus') restoreFocus: boolean = true;\n\n  /** Event emitted when the associated menu is opened. */\n  @Output() readonly menuOpened: EventEmitter<void> = new EventEmitter<void>();\n\n  /**\n   * Event emitted when the associated menu is opened.\n   * @deprecated Switch to `menuOpened` instead\n   * @breaking-change 8.0.0\n   */\n  // tslint:disable-next-line:no-output-on-prefix\n  @Output() readonly onMenuOpen: EventEmitter<void> = this.menuOpened;\n\n  /** Event emitted when the associated menu is closed. */\n  @Output() readonly menuClosed: EventEmitter<void> = new EventEmitter<void>();\n\n  /**\n   * Event emitted when the associated menu is closed.\n   * @deprecated Switch to `menuClosed` instead\n   * @breaking-change 8.0.0\n   */\n  // tslint:disable-next-line:no-output-on-prefix\n  @Output() readonly onMenuClose: EventEmitter<void> = this.menuClosed;\n\n  constructor(private _overlay: Overlay,\n              private _element: ElementRef<HTMLElement>,\n              private _viewContainerRef: ViewContainerRef,\n              @Inject(MAT_MENU_SCROLL_STRATEGY) scrollStrategy: any,\n              // `MatMenu` is always used in combination with a `MatMenuTrigger`.\n              // tslint:disable-next-line: lightweight-tokens\n              @Optional() private _parentMenu: MatMenu,\n              // `MatMenuTrigger` is commonly used in combination with a `MatMenuItem`.\n              // tslint:disable-next-line: lightweight-tokens\n              @Optional() @Self() private _menuItemInstance: MatMenuItem,\n              @Optional() private _dir: Directionality,\n              // TODO(crisbeto): make the _focusMonitor required when doing breaking changes.\n              // @breaking-change 8.0.0\n              private _focusMonitor?: FocusMonitor) {\n\n    _element.nativeElement.addEventListener('touchstart', this._handleTouchStart,\n        passiveEventListenerOptions);\n\n    if (_menuItemInstance) {\n      _menuItemInstance._triggersSubmenu = this.triggersSubmenu();\n    }\n\n    this._scrollStrategy = scrollStrategy;\n  }\n\n  ngAfterContentInit() {\n    this._checkMenu();\n    this._handleHover();\n  }\n\n  ngOnDestroy() {\n    if (this._overlayRef) {\n      this._overlayRef.dispose();\n      this._overlayRef = null;\n    }\n\n    this._element.nativeElement.removeEventListener('touchstart', this._handleTouchStart,\n        passiveEventListenerOptions);\n\n    this._menuCloseSubscription.unsubscribe();\n    this._closingActionsSubscription.unsubscribe();\n    this._hoverSubscription.unsubscribe();\n  }\n\n  /** Whether the menu is open. */\n  get menuOpen(): boolean {\n    return this._menuOpen;\n  }\n\n  /** The text direction of the containing app. */\n  get dir(): Direction {\n    return this._dir && this._dir.value === 'rtl' ? 'rtl' : 'ltr';\n  }\n\n  /** Whether the menu triggers a sub-menu or a top-level one. */\n  triggersSubmenu(): boolean {\n    return !!(this._menuItemInstance && this._parentMenu);\n  }\n\n  /** Toggles the menu between the open and closed states. */\n  toggleMenu(): void {\n    return this._menuOpen ? this.closeMenu() : this.openMenu();\n  }\n\n  /** Opens the menu. */\n  openMenu(): void {\n    if (this._menuOpen) {\n      return;\n    }\n\n    this._checkMenu();\n\n    const overlayRef = this._createOverlay();\n    const overlayConfig = overlayRef.getConfig();\n\n    this._setPosition(overlayConfig.positionStrategy as FlexibleConnectedPositionStrategy);\n    overlayConfig.hasBackdrop = this.menu.hasBackdrop == null ? !this.triggersSubmenu() :\n        this.menu.hasBackdrop;\n    overlayRef.attach(this._getPortal());\n\n    if (this.menu.lazyContent) {\n      this.menu.lazyContent.attach(this.menuData);\n    }\n\n    this._closingActionsSubscription = this._menuClosingActions().subscribe(() => this.closeMenu());\n    this._initMenu();\n\n    if (this.menu instanceof MatMenu) {\n      this.menu._startAnimation();\n    }\n  }\n\n  /** Closes the menu. */\n  closeMenu(): void {\n    this.menu.close.emit();\n  }\n\n  /**\n   * Focuses the menu trigger.\n   * @param origin Source of the menu trigger's focus.\n   */\n  focus(origin: FocusOrigin = 'program', options?: FocusOptions) {\n    if (this._focusMonitor) {\n      this._focusMonitor.focusVia(this._element, origin, options);\n    } else {\n      this._element.nativeElement.focus(options);\n    }\n  }\n\n  /** Closes the menu and does the necessary cleanup. */\n  private _destroyMenu() {\n    if (!this._overlayRef || !this.menuOpen) {\n      return;\n    }\n\n    const menu = this.menu;\n    this._closingActionsSubscription.unsubscribe();\n    this._overlayRef.detach();\n    this._restoreFocus();\n\n    if (menu instanceof MatMenu) {\n      menu._resetAnimation();\n\n      if (menu.lazyContent) {\n        // Wait for the exit animation to finish before detaching the content.\n        menu._animationDone\n          .pipe(\n            filter(event => event.toState === 'void'),\n            take(1),\n            // Interrupt if the content got re-attached.\n            takeUntil(menu.lazyContent._attached)\n          )\n          .subscribe({\n            next: () => menu.lazyContent!.detach(),\n            // No matter whether the content got re-attached, reset the menu.\n            complete: () => this._setIsMenuOpen(false)\n          });\n      } else {\n        this._setIsMenuOpen(false);\n      }\n    } else {\n      this._setIsMenuOpen(false);\n\n      if (menu.lazyContent) {\n        menu.lazyContent.detach();\n      }\n    }\n  }\n\n  /**\n   * This method sets the menu state to open and focuses the first item if\n   * the menu was opened via the keyboard.\n   */\n  private _initMenu(): void {\n    this.menu.parentMenu = this.triggersSubmenu() ? this._parentMenu : undefined;\n    this.menu.direction = this.dir;\n    this._setMenuElevation();\n    this._setIsMenuOpen(true);\n    this.menu.focusFirstItem(this._openedBy || 'program');\n  }\n\n  /** Updates the menu elevation based on the amount of parent menus that it has. */\n  private _setMenuElevation(): void {\n    if (this.menu.setElevation) {\n      let depth = 0;\n      let parentMenu = this.menu.parentMenu;\n\n      while (parentMenu) {\n        depth++;\n        parentMenu = parentMenu.parentMenu;\n      }\n\n      this.menu.setElevation(depth);\n    }\n  }\n\n  /** Restores focus to the element that was focused before the menu was open. */\n  private _restoreFocus() {\n    // We should reset focus if the user is navigating using a keyboard or\n    // if we have a top-level trigger which might cause focus to be lost\n    // when clicking on the backdrop.\n    if (this.restoreFocus) {\n      if (!this._openedBy) {\n        // Note that the focus style will show up both for `program` and\n        // `keyboard` so we don't have to specify which one it is.\n        this.focus();\n      } else if (!this.triggersSubmenu()) {\n        this.focus(this._openedBy);\n      }\n    }\n\n    this._openedBy = null;\n  }\n\n  // set state rather than toggle to support triggers sharing a menu\n  private _setIsMenuOpen(isOpen: boolean): void {\n    this._menuOpen = isOpen;\n    this._menuOpen ? this.menuOpened.emit() : this.menuClosed.emit();\n\n    if (this.triggersSubmenu()) {\n      this._menuItemInstance._highlighted = isOpen;\n    }\n  }\n\n  /**\n   * This method checks that a valid instance of MatMenu has been passed into\n   * matMenuTriggerFor. If not, an exception is thrown.\n   */\n  private _checkMenu() {\n    if (!this.menu && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throwMatMenuMissingError();\n    }\n  }\n\n  /**\n   * This method creates the overlay from the provided menu's template and saves its\n   * OverlayRef so that it can be attached to the DOM when openMenu is called.\n   */\n  private _createOverlay(): OverlayRef {\n    if (!this._overlayRef) {\n      const config = this._getOverlayConfig();\n      this._subscribeToPositions(config.positionStrategy as FlexibleConnectedPositionStrategy);\n      this._overlayRef = this._overlay.create(config);\n\n      // Consume the `keydownEvents` in order to prevent them from going to another overlay.\n      // Ideally we'd also have our keyboard event logic in here, however doing so will\n      // break anybody that may have implemented the `MatMenuPanel` themselves.\n      this._overlayRef.keydownEvents().subscribe();\n    }\n\n    return this._overlayRef;\n  }\n\n  /**\n   * This method builds the configuration object needed to create the overlay, the OverlayState.\n   * @returns OverlayConfig\n   */\n  private _getOverlayConfig(): OverlayConfig {\n    return new OverlayConfig({\n      positionStrategy: this._overlay.position()\n          .flexibleConnectedTo(this._element)\n          .withLockedPosition()\n          .withTransformOriginOn('.mat-menu-panel, .mat-mdc-menu-panel'),\n      backdropClass: this.menu.backdropClass || 'cdk-overlay-transparent-backdrop',\n      panelClass: this.menu.overlayPanelClass,\n      scrollStrategy: this._scrollStrategy(),\n      direction: this._dir\n    });\n  }\n\n  /**\n   * Listens to changes in the position of the overlay and sets the correct classes\n   * on the menu based on the new position. This ensures the animation origin is always\n   * correct, even if a fallback position is used for the overlay.\n   */\n  private _subscribeToPositions(position: FlexibleConnectedPositionStrategy): void {\n    if (this.menu.setPositionClasses) {\n      position.positionChanges.subscribe(change => {\n        const posX: MenuPositionX = change.connectionPair.overlayX === 'start' ? 'after' : 'before';\n        const posY: MenuPositionY = change.connectionPair.overlayY === 'top' ? 'below' : 'above';\n\n        this.menu.setPositionClasses!(posX, posY);\n      });\n    }\n  }\n\n  /**\n   * Sets the appropriate positions on a position strategy\n   * so the overlay connects with the trigger correctly.\n   * @param positionStrategy Strategy whose position to update.\n   */\n  private _setPosition(positionStrategy: FlexibleConnectedPositionStrategy) {\n    let [originX, originFallbackX]: HorizontalConnectionPos[] =\n        this.menu.xPosition === 'before' ? ['end', 'start'] : ['start', 'end'];\n\n    let [overlayY, overlayFallbackY]: VerticalConnectionPos[] =\n        this.menu.yPosition === 'above' ? ['bottom', 'top'] : ['top', 'bottom'];\n\n    let [originY, originFallbackY] = [overlayY, overlayFallbackY];\n    let [overlayX, overlayFallbackX] = [originX, originFallbackX];\n    let offsetY = 0;\n\n    if (this.triggersSubmenu()) {\n      // When the menu is a sub-menu, it should always align itself\n      // to the edges of the trigger, instead of overlapping it.\n      overlayFallbackX = originX = this.menu.xPosition === 'before' ? 'start' : 'end';\n      originFallbackX = overlayX = originX === 'end' ? 'start' : 'end';\n      offsetY = overlayY === 'bottom' ? MENU_PANEL_TOP_PADDING : -MENU_PANEL_TOP_PADDING;\n    } else if (!this.menu.overlapTrigger) {\n      originY = overlayY === 'top' ? 'bottom' : 'top';\n      originFallbackY = overlayFallbackY === 'top' ? 'bottom' : 'top';\n    }\n\n    positionStrategy.withPositions([\n      {originX, originY, overlayX, overlayY, offsetY},\n      {originX: originFallbackX, originY, overlayX: overlayFallbackX, overlayY, offsetY},\n      {\n        originX,\n        originY: originFallbackY,\n        overlayX,\n        overlayY: overlayFallbackY,\n        offsetY: -offsetY\n      },\n      {\n        originX: originFallbackX,\n        originY: originFallbackY,\n        overlayX: overlayFallbackX,\n        overlayY: overlayFallbackY,\n        offsetY: -offsetY\n      }\n    ]);\n  }\n\n  /** Returns a stream that emits whenever an action that should close the menu occurs. */\n  private _menuClosingActions() {\n    const backdrop = this._overlayRef!.backdropClick();\n    const detachments = this._overlayRef!.detachments();\n    const parentClose = this._parentMenu ? this._parentMenu.closed : observableOf();\n    const hover = this._parentMenu ? this._parentMenu._hovered().pipe(\n      filter(active => active !== this._menuItemInstance),\n      filter(() => this._menuOpen)\n    ) : observableOf();\n\n    return merge(backdrop, parentClose, hover, detachments);\n  }\n\n  /** Handles mouse presses on the trigger. */\n  _handleMousedown(event: MouseEvent): void {\n    if (!isFakeMousedownFromScreenReader(event)) {\n      // Since right or middle button clicks won't trigger the `click` event,\n      // we shouldn't consider the menu as opened by mouse in those cases.\n      this._openedBy = event.button === 0 ? 'mouse' : null;\n\n      // Since clicking on the trigger won't close the menu if it opens a sub-menu,\n      // we should prevent focus from moving onto it via click to avoid the\n      // highlight from lingering on the menu item.\n      if (this.triggersSubmenu()) {\n        event.preventDefault();\n      }\n    }\n  }\n\n  /** Handles key presses on the trigger. */\n  _handleKeydown(event: KeyboardEvent): void {\n    const keyCode = event.keyCode;\n\n    if (this.triggersSubmenu() && (\n            (keyCode === RIGHT_ARROW && this.dir === 'ltr') ||\n            (keyCode === LEFT_ARROW && this.dir === 'rtl'))) {\n      this.openMenu();\n    }\n  }\n\n  /** Handles click events on the trigger. */\n  _handleClick(event: MouseEvent): void {\n    if (this.triggersSubmenu()) {\n      // Stop event propagation to avoid closing the parent menu.\n      event.stopPropagation();\n      this.openMenu();\n    } else {\n      this.toggleMenu();\n    }\n  }\n\n  /** Handles the cases where the user hovers over the trigger. */\n  private _handleHover() {\n    // Subscribe to changes in the hovered item in order to toggle the panel.\n    if (!this.triggersSubmenu()) {\n      return;\n    }\n\n    this._hoverSubscription = this._parentMenu._hovered()\n      // Since we might have multiple competing triggers for the same menu (e.g. a sub-menu\n      // with different data and triggers), we have to delay it by a tick to ensure that\n      // it won't be closed immediately after it is opened.\n      .pipe(\n        filter(active => active === this._menuItemInstance && !active.disabled),\n        delay(0, asapScheduler)\n      )\n      .subscribe(() => {\n        this._openedBy = 'mouse';\n\n        // If the same menu is used between multiple triggers, it might still be animating\n        // while the new trigger tries to re-open it. Wait for the animation to finish\n        // before doing so. Also interrupt if the user moves to another item.\n        if (this.menu instanceof MatMenu && this.menu._isAnimating) {\n          // We need the `delay(0)` here in order to avoid\n          // 'changed after checked' errors in some cases. See #12194.\n          this.menu._animationDone\n            .pipe(take(1), delay(0, asapScheduler), takeUntil(this._parentMenu._hovered()))\n            .subscribe(() => this.openMenu());\n        } else {\n          this.openMenu();\n        }\n      });\n  }\n\n  /** Gets the portal that should be attached to the overlay. */\n  private _getPortal(): TemplatePortal {\n    // Note that we can avoid this check by keeping the portal on the menu panel.\n    // While it would be cleaner, we'd have to introduce another required method on\n    // `MatMenuPanel`, making it harder to consume.\n    if (!this._portal || this._portal.templateRef !== this.menu.templateRef) {\n      this._portal = new TemplatePortal(this.menu.templateRef, this._viewContainerRef);\n    }\n\n    return this._portal;\n  }\n\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {OverlayModule} from '@angular/cdk/overlay';\nimport {CommonModule} from '@angular/common';\nimport {NgModule} from '@angular/core';\nimport {MatCommonModule, MatRippleModule} from '@angular/material/core';\nimport {CdkScrollableModule} from '@angular/cdk/scrolling';\nimport {_MatMenu} from './menu';\nimport {MatMenuContent} from './menu-content';\nimport {MatMenuItem} from './menu-item';\nimport {MAT_MENU_SCROLL_STRATEGY_FACTORY_PROVIDER, MatMenuTrigger} from './menu-trigger';\n\n/**\n * Used by both the current `MatMenuModule` and the MDC `MatMenuModule`\n * to declare the menu-related directives.\n */\n@NgModule({\n  exports: [MatMenuTrigger, MatMenuContent, MatCommonModule],\n  declarations: [\n    MatMenuTrigger,\n    MatMenuContent,\n  ],\n  providers: [MAT_MENU_SCROLL_STRATEGY_FACTORY_PROVIDER]\n})\nexport class _MatMenuDirectivesModule {}\n\n@NgModule({\n  imports: [\n    CommonModule,\n    MatCommonModule,\n    MatRippleModule,\n    OverlayModule,\n    _MatMenuDirectivesModule,\n  ],\n  exports: [CdkScrollableModule, MatCommonModule, _MatMenu, MatMenuItem, _MatMenuDirectivesModule],\n  declarations: [_MatMenu, MatMenuItem],\n  providers: [MAT_MENU_SCROLL_STRATEGY_FACTORY_PROVIDER]\n})\nexport class MatMenuModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport type MenuPositionX = 'before' | 'after';\n\nexport type MenuPositionY = 'above' | 'below';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport {\n  MatMenu,\n  MatMenuDefaultOptions,\n  MAT_MENU_DEFAULT_OPTIONS,\n  _MatMenu,\n  _MatMenuBase,\n} from './menu';\nexport {MatMenuItem} from './menu-item';\nexport {MatMenuTrigger, MAT_MENU_SCROLL_STRATEGY} from './menu-trigger';\nexport {MatMenuPanel, MAT_MENU_PANEL} from './menu-panel';\nexport * from './menu-module';\nexport * from './menu-animations';\nexport * from './menu-content';\nexport * from './menu-positions';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n\nexport {MAT_MENU_DEFAULT_OPTIONS_FACTORY as ɵangular_material_src_material_menu_menu_a} from './menu';\nexport {MAT_MENU_SCROLL_STRATEGY_FACTORY as ɵangular_material_src_material_menu_menu_b,MAT_MENU_SCROLL_STRATEGY_FACTORY_PROVIDER as ɵangular_material_src_material_menu_menu_c} from './menu-trigger';","import { subscribeToArray } from './subscribeToArray';\nimport { subscribeToPromise } from './subscribeToPromise';\nimport { subscribeToIterable } from './subscribeToIterable';\nimport { subscribeToObservable } from './subscribeToObservable';\nimport { isArrayLike } from './isArrayLike';\nimport { isPromise } from './isPromise';\nimport { isObject } from './isObject';\nimport { iterator as Symbol_iterator } from '../symbol/iterator';\nimport { observable as Symbol_observable } from '../symbol/observable';\nexport const subscribeTo = (result) => {\n    if (!!result && typeof result[Symbol_observable] === 'function') {\n        return subscribeToObservable(result);\n    }\n    else if (isArrayLike(result)) {\n        return subscribeToArray(result);\n    }\n    else if (isPromise(result)) {\n        return subscribeToPromise(result);\n    }\n    else if (!!result && typeof result[Symbol_iterator] === 'function') {\n        return subscribeToIterable(result);\n    }\n    else {\n        const value = isObject(result) ? 'an invalid object' : `'${result}'`;\n        const msg = `You provided ${value} where a stream was expected.`\n            + ' You can provide an Observable, Promise, Array, or Iterable.';\n        throw new TypeError(msg);\n    }\n};\n//# sourceMappingURL=subscribeTo.js.map","import { root } from '../../util/root';\nimport { Observable } from '../../Observable';\nimport { Subscriber } from '../../Subscriber';\nimport { map } from '../../operators/map';\nfunction getCORSRequest() {\n    if (root.XMLHttpRequest) {\n        return new root.XMLHttpRequest();\n    }\n    else if (!!root.XDomainRequest) {\n        return new root.XDomainRequest();\n    }\n    else {\n        throw new Error('CORS is not supported by your browser');\n    }\n}\nfunction getXMLHttpRequest() {\n    if (root.XMLHttpRequest) {\n        return new root.XMLHttpRequest();\n    }\n    else {\n        let progId;\n        try {\n            const progIds = ['Msxml2.XMLHTTP', 'Microsoft.XMLHTTP', 'Msxml2.XMLHTTP.4.0'];\n            for (let i = 0; i < 3; i++) {\n                try {\n                    progId = progIds[i];\n                    if (new root.ActiveXObject(progId)) {\n                        break;\n                    }\n                }\n                catch (e) {\n                }\n            }\n            return new root.ActiveXObject(progId);\n        }\n        catch (e) {\n            throw new Error('XMLHttpRequest is not supported by your browser');\n        }\n    }\n}\nexport function ajaxGet(url, headers = null) {\n    return new AjaxObservable({ method: 'GET', url, headers });\n}\nexport function ajaxPost(url, body, headers) {\n    return new AjaxObservable({ method: 'POST', url, body, headers });\n}\nexport function ajaxDelete(url, headers) {\n    return new AjaxObservable({ method: 'DELETE', url, headers });\n}\nexport function ajaxPut(url, body, headers) {\n    return new AjaxObservable({ method: 'PUT', url, body, headers });\n}\nexport function ajaxPatch(url, body, headers) {\n    return new AjaxObservable({ method: 'PATCH', url, body, headers });\n}\nconst mapResponse = map((x, index) => x.response);\nexport function ajaxGetJSON(url, headers) {\n    return mapResponse(new AjaxObservable({\n        method: 'GET',\n        url,\n        responseType: 'json',\n        headers\n    }));\n}\nexport class AjaxObservable extends Observable {\n    constructor(urlOrRequest) {\n        super();\n        const request = {\n            async: true,\n            createXHR: function () {\n                return this.crossDomain ? getCORSRequest() : getXMLHttpRequest();\n            },\n            crossDomain: true,\n            withCredentials: false,\n            headers: {},\n            method: 'GET',\n            responseType: 'json',\n            timeout: 0\n        };\n        if (typeof urlOrRequest === 'string') {\n            request.url = urlOrRequest;\n        }\n        else {\n            for (const prop in urlOrRequest) {\n                if (urlOrRequest.hasOwnProperty(prop)) {\n                    request[prop] = urlOrRequest[prop];\n                }\n            }\n        }\n        this.request = request;\n    }\n    _subscribe(subscriber) {\n        return new AjaxSubscriber(subscriber, this.request);\n    }\n}\nAjaxObservable.create = (() => {\n    const create = (urlOrRequest) => {\n        return new AjaxObservable(urlOrRequest);\n    };\n    create.get = ajaxGet;\n    create.post = ajaxPost;\n    create.delete = ajaxDelete;\n    create.put = ajaxPut;\n    create.patch = ajaxPatch;\n    create.getJSON = ajaxGetJSON;\n    return create;\n})();\nexport class AjaxSubscriber extends Subscriber {\n    constructor(destination, request) {\n        super(destination);\n        this.request = request;\n        this.done = false;\n        const headers = request.headers = request.headers || {};\n        if (!request.crossDomain && !this.getHeader(headers, 'X-Requested-With')) {\n            headers['X-Requested-With'] = 'XMLHttpRequest';\n        }\n        let contentTypeHeader = this.getHeader(headers, 'Content-Type');\n        if (!contentTypeHeader && !(root.FormData && request.body instanceof root.FormData) && typeof request.body !== 'undefined') {\n            headers['Content-Type'] = 'application/x-www-form-urlencoded; charset=UTF-8';\n        }\n        request.body = this.serializeBody(request.body, this.getHeader(request.headers, 'Content-Type'));\n        this.send();\n    }\n    next(e) {\n        this.done = true;\n        const { xhr, request, destination } = this;\n        let result;\n        try {\n            result = new AjaxResponse(e, xhr, request);\n        }\n        catch (err) {\n            return destination.error(err);\n        }\n        destination.next(result);\n    }\n    send() {\n        const { request, request: { user, method, url, async, password, headers, body } } = this;\n        try {\n            const xhr = this.xhr = request.createXHR();\n            this.setupEvents(xhr, request);\n            if (user) {\n                xhr.open(method, url, async, user, password);\n            }\n            else {\n                xhr.open(method, url, async);\n            }\n            if (async) {\n                xhr.timeout = request.timeout;\n                xhr.responseType = request.responseType;\n            }\n            if ('withCredentials' in xhr) {\n                xhr.withCredentials = !!request.withCredentials;\n            }\n            this.setHeaders(xhr, headers);\n            if (body) {\n                xhr.send(body);\n            }\n            else {\n                xhr.send();\n            }\n        }\n        catch (err) {\n            this.error(err);\n        }\n    }\n    serializeBody(body, contentType) {\n        if (!body || typeof body === 'string') {\n            return body;\n        }\n        else if (root.FormData && body instanceof root.FormData) {\n            return body;\n        }\n        if (contentType) {\n            const splitIndex = contentType.indexOf(';');\n            if (splitIndex !== -1) {\n                contentType = contentType.substring(0, splitIndex);\n            }\n        }\n        switch (contentType) {\n            case 'application/x-www-form-urlencoded':\n                return Object.keys(body).map(key => `${encodeURIComponent(key)}=${encodeURIComponent(body[key])}`).join('&');\n            case 'application/json':\n                return JSON.stringify(body);\n            default:\n                return body;\n        }\n    }\n    setHeaders(xhr, headers) {\n        for (let key in headers) {\n            if (headers.hasOwnProperty(key)) {\n                xhr.setRequestHeader(key, headers[key]);\n            }\n        }\n    }\n    getHeader(headers, headerName) {\n        for (let key in headers) {\n            if (key.toLowerCase() === headerName.toLowerCase()) {\n                return headers[key];\n            }\n        }\n        return undefined;\n    }\n    setupEvents(xhr, request) {\n        const progressSubscriber = request.progressSubscriber;\n        function xhrTimeout(e) {\n            const { subscriber, progressSubscriber, request } = xhrTimeout;\n            if (progressSubscriber) {\n                progressSubscriber.error(e);\n            }\n            let error;\n            try {\n                error = new AjaxTimeoutError(this, request);\n            }\n            catch (err) {\n                error = err;\n            }\n            subscriber.error(error);\n        }\n        xhr.ontimeout = xhrTimeout;\n        xhrTimeout.request = request;\n        xhrTimeout.subscriber = this;\n        xhrTimeout.progressSubscriber = progressSubscriber;\n        if (xhr.upload && 'withCredentials' in xhr) {\n            if (progressSubscriber) {\n                let xhrProgress;\n                xhrProgress = function (e) {\n                    const { progressSubscriber } = xhrProgress;\n                    progressSubscriber.next(e);\n                };\n                if (root.XDomainRequest) {\n                    xhr.onprogress = xhrProgress;\n                }\n                else {\n                    xhr.upload.onprogress = xhrProgress;\n                }\n                xhrProgress.progressSubscriber = progressSubscriber;\n            }\n            let xhrError;\n            xhrError = function (e) {\n                const { progressSubscriber, subscriber, request } = xhrError;\n                if (progressSubscriber) {\n                    progressSubscriber.error(e);\n                }\n                let error;\n                try {\n                    error = new AjaxError('ajax error', this, request);\n                }\n                catch (err) {\n                    error = err;\n                }\n                subscriber.error(error);\n            };\n            xhr.onerror = xhrError;\n            xhrError.request = request;\n            xhrError.subscriber = this;\n            xhrError.progressSubscriber = progressSubscriber;\n        }\n        function xhrReadyStateChange(e) {\n            return;\n        }\n        xhr.onreadystatechange = xhrReadyStateChange;\n        xhrReadyStateChange.subscriber = this;\n        xhrReadyStateChange.progressSubscriber = progressSubscriber;\n        xhrReadyStateChange.request = request;\n        function xhrLoad(e) {\n            const { subscriber, progressSubscriber, request } = xhrLoad;\n            if (this.readyState === 4) {\n                let status = this.status === 1223 ? 204 : this.status;\n                let response = (this.responseType === 'text' ? (this.response || this.responseText) : this.response);\n                if (status === 0) {\n                    status = response ? 200 : 0;\n                }\n                if (status < 400) {\n                    if (progressSubscriber) {\n                        progressSubscriber.complete();\n                    }\n                    subscriber.next(e);\n                    subscriber.complete();\n                }\n                else {\n                    if (progressSubscriber) {\n                        progressSubscriber.error(e);\n                    }\n                    let error;\n                    try {\n                        error = new AjaxError('ajax error ' + status, this, request);\n                    }\n                    catch (err) {\n                        error = err;\n                    }\n                    subscriber.error(error);\n                }\n            }\n        }\n        xhr.onload = xhrLoad;\n        xhrLoad.subscriber = this;\n        xhrLoad.progressSubscriber = progressSubscriber;\n        xhrLoad.request = request;\n    }\n    unsubscribe() {\n        const { done, xhr } = this;\n        if (!done && xhr && xhr.readyState !== 4 && typeof xhr.abort === 'function') {\n            xhr.abort();\n        }\n        super.unsubscribe();\n    }\n}\nexport class AjaxResponse {\n    constructor(originalEvent, xhr, request) {\n        this.originalEvent = originalEvent;\n        this.xhr = xhr;\n        this.request = request;\n        this.status = xhr.status;\n        this.responseType = xhr.responseType || request.responseType;\n        this.response = parseXhrResponse(this.responseType, xhr);\n    }\n}\nconst AjaxErrorImpl = (() => {\n    function AjaxErrorImpl(message, xhr, request) {\n        Error.call(this);\n        this.message = message;\n        this.name = 'AjaxError';\n        this.xhr = xhr;\n        this.request = request;\n        this.status = xhr.status;\n        this.responseType = xhr.responseType || request.responseType;\n        this.response = parseXhrResponse(this.responseType, xhr);\n        return this;\n    }\n    AjaxErrorImpl.prototype = Object.create(Error.prototype);\n    return AjaxErrorImpl;\n})();\nexport const AjaxError = AjaxErrorImpl;\nfunction parseJson(xhr) {\n    if ('response' in xhr) {\n        return xhr.responseType ? xhr.response : JSON.parse(xhr.response || xhr.responseText || 'null');\n    }\n    else {\n        return JSON.parse(xhr.responseText || 'null');\n    }\n}\nfunction parseXhrResponse(responseType, xhr) {\n    switch (responseType) {\n        case 'json':\n            return parseJson(xhr);\n        case 'xml':\n            return xhr.responseXML;\n        case 'text':\n        default:\n            return ('response' in xhr) ? xhr.response : xhr.responseText;\n    }\n}\nfunction AjaxTimeoutErrorImpl(xhr, request) {\n    AjaxError.call(this, 'ajax timeout', xhr, request);\n    this.name = 'AjaxTimeoutError';\n    return this;\n}\nexport const AjaxTimeoutError = AjaxTimeoutErrorImpl;\n//# sourceMappingURL=AjaxObservable.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * The Min operator operates on an Observable that emits numbers (or items that can be compared with a provided function),\n * and when source Observable completes it emits a single item: the item with the smallest value.\n *\n * <img src=\"./img/min.png\" width=\"100%\">\n *\n * @example <caption>Get the minimal value of a series of numbers</caption>\n * Rx.Observable.of(5, 4, 7, 2, 8)\n *   .min()\n *   .subscribe(x => console.log(x)); // -> 2\n *\n * @example <caption>Use a comparer function to get the minimal item</caption>\n * interface Person {\n *   age: number,\n *   name: string\n * }\n * Observable.of<Person>({age: 7, name: 'Foo'},\n *                       {age: 5, name: 'Bar'},\n *                       {age: 9, name: 'Beer'})\n *           .min<Person>( (a: Person, b: Person) => a.age < b.age ? -1 : 1)\n *           .subscribe((x: Person) => console.log(x.name)); // -> 'Bar'\n * }\n *\n * @see {@link max}\n *\n * @param {Function} [comparer] - Optional comparer function that it will use instead of its default to compare the\n * value of two items.\n * @return {Observable<R>} An Observable that emits item with the smallest value.\n * @method min\n * @owner Observable\n */\nfunction min(comparer) {\n    return operators_1.min(comparer)(this);\n}\nexports.min = min;\n//# sourceMappingURL=min.js.map","function _setPrototypeOf(o, p) {\n  module.exports = _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {\n    o.__proto__ = p;\n    return o;\n  };\n\n  return _setPrototypeOf(o, p);\n}\n\nmodule.exports = _setPrototypeOf;","export function identity(x) {\n    return x;\n}\n//# sourceMappingURL=identity.js.map","import { EmptyError } from '../util/EmptyError';\nimport { filter } from './filter';\nimport { take } from './take';\nimport { defaultIfEmpty } from './defaultIfEmpty';\nimport { throwIfEmpty } from './throwIfEmpty';\nimport { identity } from '../util/identity';\nexport function first(predicate, defaultValue) {\n    const hasDefaultValue = arguments.length >= 2;\n    return (source) => source.pipe(predicate ? filter((v, i) => predicate(v, i, source)) : identity, take(1), hasDefaultValue ? defaultIfEmpty(defaultValue) : throwIfEmpty(() => new EmptyError()));\n}\n//# sourceMappingURL=first.js.map","import arrayWithHoles from \"./arrayWithHoles\";\nimport iterableToArray from \"./iterableToArray\";\nimport unsupportedIterableToArray from \"./unsupportedIterableToArray\";\nimport nonIterableRest from \"./nonIterableRest\";\nexport default function _toArray(arr) {\n  return arrayWithHoles(arr) || iterableToArray(arr) || unsupportedIterableToArray(arr) || nonIterableRest();\n}","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar toArray_1 = require(\"../../operator/toArray\");\nrxjs_1.Observable.prototype.toArray = toArray_1.toArray;\n//# sourceMappingURL=toArray.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Branch out the source Observable values as a nested Observable with each\n * nested Observable emitting at most `windowSize` values.\n *\n * <span class=\"informal\">It's like {@link bufferCount}, but emits a nested\n * Observable instead of an array.</span>\n *\n * <img src=\"./img/windowCount.png\" width=\"100%\">\n *\n * Returns an Observable that emits windows of items it collects from the source\n * Observable. The output Observable emits windows every `startWindowEvery`\n * items, each containing no more than `windowSize` items. When the source\n * Observable completes or encounters an error, the output Observable emits\n * the current window and propagates the notification from the source\n * Observable. If `startWindowEvery` is not provided, then new windows are\n * started immediately at the start of the source and when each window completes\n * with size `windowSize`.\n *\n * @example <caption>Ignore every 3rd click event, starting from the first one</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.windowCount(3)\n *   .map(win => win.skip(1)) // skip first of every 3 clicks\n *   .mergeAll(); // flatten the Observable-of-Observables\n * result.subscribe(x => console.log(x));\n *\n * @example <caption>Ignore every 3rd click event, starting from the third one</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.windowCount(2, 3)\n *   .mergeAll(); // flatten the Observable-of-Observables\n * result.subscribe(x => console.log(x));\n *\n * @see {@link window}\n * @see {@link windowTime}\n * @see {@link windowToggle}\n * @see {@link windowWhen}\n * @see {@link bufferCount}\n *\n * @param {number} windowSize The maximum number of values emitted by each\n * window.\n * @param {number} [startWindowEvery] Interval at which to start a new window.\n * For example if `startWindowEvery` is `2`, then a new window will be started\n * on every other value from the source. A new window is started at the\n * beginning of the source by default.\n * @return {Observable<Observable<T>>} An Observable of windows, which in turn\n * are Observable of values.\n * @method windowCount\n * @owner Observable\n */\nfunction windowCount(windowSize, startWindowEvery) {\n    if (startWindowEvery === void 0) { startWindowEvery = 0; }\n    return operators_1.windowCount(windowSize, startWindowEvery)(this);\n}\nexports.windowCount = windowCount;\n//# sourceMappingURL=windowCount.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/* tslint:enable:max-line-length */\n/**\n * Emits only the first value emitted by the source Observable that meets some\n * condition.\n *\n * <span class=\"informal\">Finds the first value that passes some test and emits\n * that.</span>\n *\n * <img src=\"./img/find.png\" width=\"100%\">\n *\n * `find` searches for the first item in the source Observable that matches the\n * specified condition embodied by the `predicate`, and returns the first\n * occurrence in the source. Unlike {@link first}, the `predicate` is required\n * in `find`, and does not emit an error if a valid value is not found.\n *\n * @example <caption>Find and emit the first click that happens on a DIV element</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.find(ev => ev.target.tagName === 'DIV');\n * result.subscribe(x => console.log(x));\n *\n * @see {@link filter}\n * @see {@link first}\n * @see {@link findIndex}\n * @see {@link take}\n *\n * @param {function(value: T, index: number, source: Observable<T>): boolean} predicate\n * A function called with each item to test for condition matching.\n * @param {any} [thisArg] An optional argument to determine the value of `this`\n * in the `predicate` function.\n * @return {Observable<T>} An Observable of the first item that matches the\n * condition.\n * @method find\n * @owner Observable\n */\nfunction find(predicate, thisArg) {\n    return operators_1.find(predicate, thisArg)(this);\n}\nexports.find = find;\n//# sourceMappingURL=find.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar distinctUntilKeyChanged_1 = require(\"../../operator/distinctUntilKeyChanged\");\nrxjs_1.Observable.prototype.distinctUntilKeyChanged = distinctUntilKeyChanged_1.distinctUntilKeyChanged;\n//# sourceMappingURL=distinctUntilKeyChanged.js.map","export default function _typeof(obj) {\n  \"@babel/helpers - typeof\";\n\n  if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {\n    _typeof = function _typeof(obj) {\n      return typeof obj;\n    };\n  } else {\n    _typeof = function _typeof(obj) {\n      return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;\n    };\n  }\n\n  return _typeof(obj);\n}","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Compares all values of two observables in sequence using an optional comparor function\n * and returns an observable of a single boolean value representing whether or not the two sequences\n * are equal.\n *\n * <span class=\"informal\">Checks to see of all values emitted by both observables are equal, in order.</span>\n *\n * <img src=\"./img/sequenceEqual.png\" width=\"100%\">\n *\n * `sequenceEqual` subscribes to two observables and buffers incoming values from each observable. Whenever either\n * observable emits a value, the value is buffered and the buffers are shifted and compared from the bottom\n * up; If any value pair doesn't match, the returned observable will emit `false` and complete. If one of the\n * observables completes, the operator will wait for the other observable to complete; If the other\n * observable emits before completing, the returned observable will emit `false` and complete. If one observable never\n * completes or emits after the other complets, the returned observable will never complete.\n *\n * @example <caption>figure out if the Konami code matches</caption>\n * var code = Rx.Observable.from([\n *  \"ArrowUp\",\n *  \"ArrowUp\",\n *  \"ArrowDown\",\n *  \"ArrowDown\",\n *  \"ArrowLeft\",\n *  \"ArrowRight\",\n *  \"ArrowLeft\",\n *  \"ArrowRight\",\n *  \"KeyB\",\n *  \"KeyA\",\n *  \"Enter\" // no start key, clearly.\n * ]);\n *\n * var keys = Rx.Observable.fromEvent(document, 'keyup')\n *  .map(e => e.code);\n * var matches = keys.bufferCount(11, 1)\n *  .mergeMap(\n *    last11 =>\n *      Rx.Observable.from(last11)\n *        .sequenceEqual(code)\n *   );\n * matches.subscribe(matched => console.log('Successful cheat at Contra? ', matched));\n *\n * @see {@link combineLatest}\n * @see {@link zip}\n * @see {@link withLatestFrom}\n *\n * @param {Observable} compareTo The observable sequence to compare the source sequence to.\n * @param {function} [comparor] An optional function to compare each value pair\n * @return {Observable} An Observable of a single boolean value representing whether or not\n * the values emitted by both observables were equal in sequence.\n * @method sequenceEqual\n * @owner Observable\n */\nfunction sequenceEqual(compareTo, comparor) {\n    return operators_1.sequenceEqual(compareTo, comparor)(this);\n}\nexports.sequenceEqual = sequenceEqual;\n//# sourceMappingURL=sequenceEqual.js.map","import { BehaviorSubject } from '../BehaviorSubject';\nimport { multicast } from './multicast';\nexport function publishBehavior(value) {\n    return (source) => multicast(new BehaviorSubject(value))(source);\n}\n//# sourceMappingURL=publishBehavior.js.map","import { Subject } from '../Subject';\nimport { async } from '../scheduler/async';\nimport { Subscriber } from '../Subscriber';\nimport { isNumeric } from '../util/isNumeric';\nimport { isScheduler } from '../util/isScheduler';\nexport function windowTime(windowTimeSpan) {\n    let scheduler = async;\n    let windowCreationInterval = null;\n    let maxWindowSize = Number.POSITIVE_INFINITY;\n    if (isScheduler(arguments[3])) {\n        scheduler = arguments[3];\n    }\n    if (isScheduler(arguments[2])) {\n        scheduler = arguments[2];\n    }\n    else if (isNumeric(arguments[2])) {\n        maxWindowSize = Number(arguments[2]);\n    }\n    if (isScheduler(arguments[1])) {\n        scheduler = arguments[1];\n    }\n    else if (isNumeric(arguments[1])) {\n        windowCreationInterval = Number(arguments[1]);\n    }\n    return function windowTimeOperatorFunction(source) {\n        return source.lift(new WindowTimeOperator(windowTimeSpan, windowCreationInterval, maxWindowSize, scheduler));\n    };\n}\nclass WindowTimeOperator {\n    constructor(windowTimeSpan, windowCreationInterval, maxWindowSize, scheduler) {\n        this.windowTimeSpan = windowTimeSpan;\n        this.windowCreationInterval = windowCreationInterval;\n        this.maxWindowSize = maxWindowSize;\n        this.scheduler = scheduler;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new WindowTimeSubscriber(subscriber, this.windowTimeSpan, this.windowCreationInterval, this.maxWindowSize, this.scheduler));\n    }\n}\nclass CountedSubject extends Subject {\n    constructor() {\n        super(...arguments);\n        this._numberOfNextedValues = 0;\n    }\n    next(value) {\n        this._numberOfNextedValues++;\n        super.next(value);\n    }\n    get numberOfNextedValues() {\n        return this._numberOfNextedValues;\n    }\n}\nclass WindowTimeSubscriber extends Subscriber {\n    constructor(destination, windowTimeSpan, windowCreationInterval, maxWindowSize, scheduler) {\n        super(destination);\n        this.destination = destination;\n        this.windowTimeSpan = windowTimeSpan;\n        this.windowCreationInterval = windowCreationInterval;\n        this.maxWindowSize = maxWindowSize;\n        this.scheduler = scheduler;\n        this.windows = [];\n        const window = this.openWindow();\n        if (windowCreationInterval !== null && windowCreationInterval >= 0) {\n            const closeState = { subscriber: this, window, context: null };\n            const creationState = { windowTimeSpan, windowCreationInterval, subscriber: this, scheduler };\n            this.add(scheduler.schedule(dispatchWindowClose, windowTimeSpan, closeState));\n            this.add(scheduler.schedule(dispatchWindowCreation, windowCreationInterval, creationState));\n        }\n        else {\n            const timeSpanOnlyState = { subscriber: this, window, windowTimeSpan };\n            this.add(scheduler.schedule(dispatchWindowTimeSpanOnly, windowTimeSpan, timeSpanOnlyState));\n        }\n    }\n    _next(value) {\n        const windows = this.windows;\n        const len = windows.length;\n        for (let i = 0; i < len; i++) {\n            const window = windows[i];\n            if (!window.closed) {\n                window.next(value);\n                if (window.numberOfNextedValues >= this.maxWindowSize) {\n                    this.closeWindow(window);\n                }\n            }\n        }\n    }\n    _error(err) {\n        const windows = this.windows;\n        while (windows.length > 0) {\n            windows.shift().error(err);\n        }\n        this.destination.error(err);\n    }\n    _complete() {\n        const windows = this.windows;\n        while (windows.length > 0) {\n            const window = windows.shift();\n            if (!window.closed) {\n                window.complete();\n            }\n        }\n        this.destination.complete();\n    }\n    openWindow() {\n        const window = new CountedSubject();\n        this.windows.push(window);\n        const destination = this.destination;\n        destination.next(window);\n        return window;\n    }\n    closeWindow(window) {\n        window.complete();\n        const windows = this.windows;\n        windows.splice(windows.indexOf(window), 1);\n    }\n}\nfunction dispatchWindowTimeSpanOnly(state) {\n    const { subscriber, windowTimeSpan, window } = state;\n    if (window) {\n        subscriber.closeWindow(window);\n    }\n    state.window = subscriber.openWindow();\n    this.schedule(state, windowTimeSpan);\n}\nfunction dispatchWindowCreation(state) {\n    const { windowTimeSpan, subscriber, scheduler, windowCreationInterval } = state;\n    const window = subscriber.openWindow();\n    const action = this;\n    let context = { action, subscription: null };\n    const timeSpanState = { subscriber, window, context };\n    context.subscription = scheduler.schedule(dispatchWindowClose, windowTimeSpan, timeSpanState);\n    action.add(context.subscription);\n    action.schedule(state, windowCreationInterval);\n}\nfunction dispatchWindowClose(state) {\n    const { subscriber, window, context } = state;\n    if (context && context.action && context.subscription) {\n        context.action.remove(context.subscription);\n    }\n    subscriber.closeWindow(window);\n}\n//# sourceMappingURL=windowTime.js.map","import { mergeMap } from './mergeMap';\nexport function mergeMapTo(innerObservable, resultSelector, concurrent = Number.POSITIVE_INFINITY) {\n    if (typeof resultSelector === 'function') {\n        return mergeMap(() => innerObservable, resultSelector, concurrent);\n    }\n    if (typeof resultSelector === 'number') {\n        concurrent = resultSelector;\n    }\n    return mergeMap(() => innerObservable, concurrent);\n}\n//# sourceMappingURL=mergeMapTo.js.map","import { ReplaySubject } from '../ReplaySubject';\nexport function shareReplay(configOrBufferSize, windowTime, scheduler) {\n    let config;\n    if (configOrBufferSize && typeof configOrBufferSize === 'object') {\n        config = configOrBufferSize;\n    }\n    else {\n        config = {\n            bufferSize: configOrBufferSize,\n            windowTime,\n            refCount: false,\n            scheduler\n        };\n    }\n    return (source) => source.lift(shareReplayOperator(config));\n}\nfunction shareReplayOperator({ bufferSize = Number.POSITIVE_INFINITY, windowTime = Number.POSITIVE_INFINITY, refCount: useRefCount, scheduler }) {\n    let subject;\n    let refCount = 0;\n    let subscription;\n    let hasError = false;\n    let isComplete = false;\n    return function shareReplayOperation(source) {\n        refCount++;\n        let innerSub;\n        if (!subject || hasError) {\n            hasError = false;\n            subject = new ReplaySubject(bufferSize, windowTime, scheduler);\n            innerSub = subject.subscribe(this);\n            subscription = source.subscribe({\n                next(value) { subject.next(value); },\n                error(err) {\n                    hasError = true;\n                    subject.error(err);\n                },\n                complete() {\n                    isComplete = true;\n                    subscription = undefined;\n                    subject.complete();\n                },\n            });\n        }\n        else {\n            innerSub = subject.subscribe(this);\n        }\n        this.add(() => {\n            refCount--;\n            innerSub.unsubscribe();\n            if (subscription && !isComplete && useRefCount && refCount === 0) {\n                subscription.unsubscribe();\n                subscription = undefined;\n                subject = undefined;\n            }\n        });\n    };\n}\n//# sourceMappingURL=shareReplay.js.map","import { Observable } from '../Observable';\nimport { isScheduler } from '../util/isScheduler';\nimport { mergeAll } from '../operators/mergeAll';\nimport { fromArray } from './fromArray';\nexport function merge(...observables) {\n    let concurrent = Number.POSITIVE_INFINITY;\n    let scheduler = null;\n    let last = observables[observables.length - 1];\n    if (isScheduler(last)) {\n        scheduler = observables.pop();\n        if (observables.length > 1 && typeof observables[observables.length - 1] === 'number') {\n            concurrent = observables.pop();\n        }\n    }\n    else if (typeof last === 'number') {\n        concurrent = observables.pop();\n    }\n    if (scheduler === null && observables.length === 1 && observables[0] instanceof Observable) {\n        return observables[0];\n    }\n    return mergeAll(concurrent)(fromArray(observables, scheduler));\n}\n//# sourceMappingURL=merge.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar share_1 = require(\"../../operator/share\");\nrxjs_1.Observable.prototype.share = share_1.share;\n//# sourceMappingURL=share.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar timeInterval_1 = require(\"../../operator/timeInterval\");\nrxjs_1.Observable.prototype.timeInterval = timeInterval_1.timeInterval;\n//# sourceMappingURL=timeInterval.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar internal_compatibility_1 = require(\"rxjs/internal-compatibility\");\n/* tslint:enable:max-line-length */\n/**\n * Combines multiple Observables to create an Observable whose values are\n * calculated from the latest values of each of its input Observables.\n *\n * <span class=\"informal\">Whenever any input Observable emits a value, it\n * computes a formula using the latest values from all the inputs, then emits\n * the output of that formula.</span>\n *\n * <img src=\"./img/combineLatest.png\" width=\"100%\">\n *\n * `combineLatest` combines the values from this Observable with values from\n * Observables passed as arguments. This is done by subscribing to each\n * Observable, in order, and collecting an array of each of the most recent\n * values any time any of the input Observables emits, then either taking that\n * array and passing it as arguments to an optional `project` function and\n * emitting the return value of that, or just emitting the array of recent\n * values directly if there is no `project` function.\n *\n * @example <caption>Dynamically calculate the Body-Mass Index from an Observable of weight and one for height</caption>\n * var weight = Rx.Observable.of(70, 72, 76, 79, 75);\n * var height = Rx.Observable.of(1.76, 1.77, 1.78);\n * var bmi = weight.combineLatest(height, (w, h) => w / (h * h));\n * bmi.subscribe(x => console.log('BMI is ' + x));\n *\n * // With output to console:\n * // BMI is 24.212293388429753\n * // BMI is 23.93948099205209\n * // BMI is 23.671253629592222\n *\n * @see {@link combineAll}\n * @see {@link merge}\n * @see {@link withLatestFrom}\n *\n * @param {ObservableInput} other An input Observable to combine with the source\n * Observable. More than one input Observables may be given as argument.\n * @param {function} [project] An optional function to project the values from\n * the combined latest values into a new value on the output Observable.\n * @return {Observable} An Observable of projected values from the most recent\n * values from each input Observable, or an array of the most recent values from\n * each input Observable.\n * @method combineLatest\n * @owner Observable\n */\nfunction combineLatest() {\n    var observables = [];\n    for (var _i = 0; _i < arguments.length; _i++) {\n        observables[_i] = arguments[_i];\n    }\n    var project = null;\n    if (typeof observables[observables.length - 1] === 'function') {\n        project = observables.pop();\n    }\n    // if the first and only other argument besides the resultSelector is an array\n    // assume it's been called with `combineLatest([obs1, obs2, obs3], project)`\n    if (observables.length === 1 && internal_compatibility_1.isArray(observables[0])) {\n        observables = observables[0].slice();\n    }\n    return this.lift.call(rxjs_1.of.apply(void 0, [this].concat(observables)), new internal_compatibility_1.CombineLatestOperator(project));\n}\nexports.combineLatest = combineLatest;\n//# sourceMappingURL=combineLatest.js.map","import { AsyncAction } from './AsyncAction';\nexport class AnimationFrameAction extends AsyncAction {\n    constructor(scheduler, work) {\n        super(scheduler, work);\n        this.scheduler = scheduler;\n        this.work = work;\n    }\n    requestAsyncId(scheduler, id, delay = 0) {\n        if (delay !== null && delay > 0) {\n            return super.requestAsyncId(scheduler, id, delay);\n        }\n        scheduler.actions.push(this);\n        return scheduler.scheduled || (scheduler.scheduled = requestAnimationFrame(() => scheduler.flush(null)));\n    }\n    recycleAsyncId(scheduler, id, delay = 0) {\n        if ((delay !== null && delay > 0) || (delay === null && this.delay > 0)) {\n            return super.recycleAsyncId(scheduler, id, delay);\n        }\n        if (scheduler.actions.length === 0) {\n            cancelAnimationFrame(id);\n            scheduler.scheduled = undefined;\n        }\n        return undefined;\n    }\n}\n//# sourceMappingURL=AnimationFrameAction.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar internal_compatibility_1 = require(\"rxjs/internal-compatibility\");\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Emits a value from the source Observable, then ignores subsequent source\n * values for `duration` milliseconds, then repeats this process.\n *\n * <span class=\"informal\">Lets a value pass, then ignores source values for the\n * next `duration` milliseconds.</span>\n *\n * <img src=\"./img/throttleTime.png\" width=\"100%\">\n *\n * `throttleTime` emits the source Observable values on the output Observable\n * when its internal timer is disabled, and ignores source values when the timer\n * is enabled. Initially, the timer is disabled. As soon as the first source\n * value arrives, it is forwarded to the output Observable, and then the timer\n * is enabled. After `duration` milliseconds (or the time unit determined\n * internally by the optional `scheduler`) has passed, the timer is disabled,\n * and this process repeats for the next source value. Optionally takes a\n * {@link IScheduler} for managing timers.\n *\n * @example <caption>Emit clicks at a rate of at most one click per second</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.throttleTime(1000);\n * result.subscribe(x => console.log(x));\n *\n * @see {@link auditTime}\n * @see {@link debounceTime}\n * @see {@link delay}\n * @see {@link sampleTime}\n * @see {@link throttle}\n *\n * @param {number} duration Time to wait before emitting another value after\n * emitting the last value, measured in milliseconds or the time unit determined\n * internally by the optional `scheduler`.\n * @param {Scheduler} [scheduler=asyncScheduler] The {@link SchedulerLike} to use for\n * managing the timers that handle the throttling.\n * @return {Observable<T>} An Observable that performs the throttle operation to\n * limit the rate of emissions from the source.\n * @method throttleTime\n * @owner Observable\n */\nfunction throttleTime(duration, scheduler, config) {\n    if (scheduler === void 0) { scheduler = rxjs_1.asyncScheduler; }\n    if (config === void 0) { config = internal_compatibility_1.defaultThrottleConfig; }\n    return operators_1.throttleTime(duration, scheduler, config)(this);\n}\nexports.throttleTime = throttleTime;\n//# sourceMappingURL=throttleTime.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar repeatWhen_1 = require(\"../../operator/repeatWhen\");\nrxjs_1.Observable.prototype.repeatWhen = repeatWhen_1.repeatWhen;\n//# sourceMappingURL=repeatWhen.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar switchMapTo_1 = require(\"../../operator/switchMapTo\");\nrxjs_1.Observable.prototype.switchMapTo = switchMapTo_1.switchMapTo;\n//# sourceMappingURL=switchMapTo.js.map","function _defineProperties(target, props) {\n  for (var i = 0; i < props.length; i++) {\n    var descriptor = props[i];\n    descriptor.enumerable = descriptor.enumerable || false;\n    descriptor.configurable = true;\n    if (\"value\" in descriptor) descriptor.writable = true;\n    Object.defineProperty(target, descriptor.key, descriptor);\n  }\n}\n\nfunction _createClass(Constructor, protoProps, staticProps) {\n  if (protoProps) _defineProperties(Constructor.prototype, protoProps);\n  if (staticProps) _defineProperties(Constructor, staticProps);\n  return Constructor;\n}\n\nmodule.exports = _createClass;","import { empty } from './observable/empty';\nimport { of } from './observable/of';\nimport { throwError } from './observable/throwError';\nexport var NotificationKind;\n(function (NotificationKind) {\n    NotificationKind[\"NEXT\"] = \"N\";\n    NotificationKind[\"ERROR\"] = \"E\";\n    NotificationKind[\"COMPLETE\"] = \"C\";\n})(NotificationKind || (NotificationKind = {}));\nexport class Notification {\n    constructor(kind, value, error) {\n        this.kind = kind;\n        this.value = value;\n        this.error = error;\n        this.hasValue = kind === 'N';\n    }\n    observe(observer) {\n        switch (this.kind) {\n            case 'N':\n                return observer.next && observer.next(this.value);\n            case 'E':\n                return observer.error && observer.error(this.error);\n            case 'C':\n                return observer.complete && observer.complete();\n        }\n    }\n    do(next, error, complete) {\n        const kind = this.kind;\n        switch (kind) {\n            case 'N':\n                return next && next(this.value);\n            case 'E':\n                return error && error(this.error);\n            case 'C':\n                return complete && complete();\n        }\n    }\n    accept(nextOrObserver, error, complete) {\n        if (nextOrObserver && typeof nextOrObserver.next === 'function') {\n            return this.observe(nextOrObserver);\n        }\n        else {\n            return this.do(nextOrObserver, error, complete);\n        }\n    }\n    toObservable() {\n        const kind = this.kind;\n        switch (kind) {\n            case 'N':\n                return of(this.value);\n            case 'E':\n                return throwError(this.error);\n            case 'C':\n                return empty();\n        }\n        throw new Error('unexpected notification kind value');\n    }\n    static createNext(value) {\n        if (typeof value !== 'undefined') {\n            return new Notification('N', value);\n        }\n        return Notification.undefinedValueNotification;\n    }\n    static createError(err) {\n        return new Notification('E', undefined, err);\n    }\n    static createComplete() {\n        return Notification.completeNotification;\n    }\n}\nNotification.completeNotification = new Notification('C');\nNotification.undefinedValueNotification = new Notification('N', undefined);\n//# sourceMappingURL=Notification.js.map","import { Observable } from '../Observable';\nimport { identity } from '../util/identity';\nimport { isScheduler } from '../util/isScheduler';\nexport function generate(initialStateOrOptions, condition, iterate, resultSelectorOrObservable, scheduler) {\n    let resultSelector;\n    let initialState;\n    if (arguments.length == 1) {\n        const options = initialStateOrOptions;\n        initialState = options.initialState;\n        condition = options.condition;\n        iterate = options.iterate;\n        resultSelector = options.resultSelector || identity;\n        scheduler = options.scheduler;\n    }\n    else if (resultSelectorOrObservable === undefined || isScheduler(resultSelectorOrObservable)) {\n        initialState = initialStateOrOptions;\n        resultSelector = identity;\n        scheduler = resultSelectorOrObservable;\n    }\n    else {\n        initialState = initialStateOrOptions;\n        resultSelector = resultSelectorOrObservable;\n    }\n    return new Observable(subscriber => {\n        let state = initialState;\n        if (scheduler) {\n            return scheduler.schedule(dispatch, 0, {\n                subscriber,\n                iterate,\n                condition,\n                resultSelector,\n                state\n            });\n        }\n        do {\n            if (condition) {\n                let conditionResult;\n                try {\n                    conditionResult = condition(state);\n                }\n                catch (err) {\n                    subscriber.error(err);\n                    return undefined;\n                }\n                if (!conditionResult) {\n                    subscriber.complete();\n                    break;\n                }\n            }\n            let value;\n            try {\n                value = resultSelector(state);\n            }\n            catch (err) {\n                subscriber.error(err);\n                return undefined;\n            }\n            subscriber.next(value);\n            if (subscriber.closed) {\n                break;\n            }\n            try {\n                state = iterate(state);\n            }\n            catch (err) {\n                subscriber.error(err);\n                return undefined;\n            }\n        } while (true);\n        return undefined;\n    });\n}\nfunction dispatch(state) {\n    const { subscriber, condition } = state;\n    if (subscriber.closed) {\n        return undefined;\n    }\n    if (state.needIterate) {\n        try {\n            state.state = state.iterate(state.state);\n        }\n        catch (err) {\n            subscriber.error(err);\n            return undefined;\n        }\n    }\n    else {\n        state.needIterate = true;\n    }\n    if (condition) {\n        let conditionResult;\n        try {\n            conditionResult = condition(state.state);\n        }\n        catch (err) {\n            subscriber.error(err);\n            return undefined;\n        }\n        if (!conditionResult) {\n            subscriber.complete();\n            return undefined;\n        }\n        if (subscriber.closed) {\n            return undefined;\n        }\n    }\n    let value;\n    try {\n        value = state.resultSelector(state.state);\n    }\n    catch (err) {\n        subscriber.error(err);\n        return undefined;\n    }\n    if (subscriber.closed) {\n        return undefined;\n    }\n    subscriber.next(value);\n    if (subscriber.closed) {\n        return undefined;\n    }\n    return this.schedule(state);\n}\n//# sourceMappingURL=generate.js.map","function _arrayLikeToArray(arr, len) {\n  if (len == null || len > arr.length) len = arr.length;\n\n  for (var i = 0, arr2 = new Array(len); i < len; i++) {\n    arr2[i] = arr[i];\n  }\n\n  return arr2;\n}\n\nmodule.exports = _arrayLikeToArray;","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  Component,\n  ViewEncapsulation,\n  ChangeDetectionStrategy,\n  Directive,\n  Input,\n  Optional,\n  Inject,\n} from '@angular/core';\nimport {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';\n\n\n/**\n * Content of a card, needed as it's used as a selector in the API.\n * @docs-private\n */\n@Directive({\n  selector: 'mat-card-content, [mat-card-content], [matCardContent]',\n  host: {'class': 'mat-card-content'}\n})\nexport class MatCardContent {}\n\n/**\n * Title of a card, needed as it's used as a selector in the API.\n * @docs-private\n */\n@Directive({\n  selector: `mat-card-title, [mat-card-title], [matCardTitle]`,\n  host: {\n    'class': 'mat-card-title'\n  }\n})\nexport class MatCardTitle {}\n\n/**\n * Sub-title of a card, needed as it's used as a selector in the API.\n * @docs-private\n */\n@Directive({\n  selector: `mat-card-subtitle, [mat-card-subtitle], [matCardSubtitle]`,\n  host: {\n    'class': 'mat-card-subtitle'\n  }\n})\nexport class MatCardSubtitle {}\n\n/**\n * Action section of a card, needed as it's used as a selector in the API.\n * @docs-private\n */\n@Directive({\n  selector: 'mat-card-actions',\n  exportAs: 'matCardActions',\n  host: {\n    'class': 'mat-card-actions',\n    '[class.mat-card-actions-align-end]': 'align === \"end\"',\n  }\n})\nexport class MatCardActions {\n  /** Position of the actions inside the card. */\n  @Input() align: 'start' | 'end' = 'start';\n}\n\n/**\n * Footer of a card, needed as it's used as a selector in the API.\n * @docs-private\n */\n@Directive({\n  selector: 'mat-card-footer',\n  host: {'class': 'mat-card-footer'}\n})\nexport class MatCardFooter {}\n\n/**\n * Image used in a card, needed to add the mat- CSS styling.\n * @docs-private\n */\n@Directive({\n  selector: '[mat-card-image], [matCardImage]',\n  host: {'class': 'mat-card-image'}\n})\nexport class MatCardImage {}\n\n/**\n * Image used in a card, needed to add the mat- CSS styling.\n * @docs-private\n */\n@Directive({\n  selector: '[mat-card-sm-image], [matCardImageSmall]',\n  host: {'class': 'mat-card-sm-image'}\n})\nexport class MatCardSmImage {}\n\n/**\n * Image used in a card, needed to add the mat- CSS styling.\n * @docs-private\n */\n@Directive({\n  selector: '[mat-card-md-image], [matCardImageMedium]',\n  host: {'class': 'mat-card-md-image'}\n})\nexport class MatCardMdImage {}\n\n/**\n * Image used in a card, needed to add the mat- CSS styling.\n * @docs-private\n */\n@Directive({\n  selector: '[mat-card-lg-image], [matCardImageLarge]',\n  host: {'class': 'mat-card-lg-image'}\n})\nexport class MatCardLgImage {}\n\n/**\n * Large image used in a card, needed to add the mat- CSS styling.\n * @docs-private\n */\n@Directive({\n  selector: '[mat-card-xl-image], [matCardImageXLarge]',\n  host: {'class': 'mat-card-xl-image'}\n})\nexport class MatCardXlImage {}\n\n/**\n * Avatar image used in a card, needed to add the mat- CSS styling.\n * @docs-private\n */\n@Directive({\n  selector: '[mat-card-avatar], [matCardAvatar]',\n  host: {'class': 'mat-card-avatar'}\n})\nexport class MatCardAvatar {}\n\n\n/**\n * A basic content container component that adds the styles of a Material design card.\n *\n * While this component can be used alone, it also provides a number\n * of preset styles for common card sections, including:\n * - mat-card-title\n * - mat-card-subtitle\n * - mat-card-content\n * - mat-card-actions\n * - mat-card-footer\n */\n@Component({\n  selector: 'mat-card',\n  exportAs: 'matCard',\n  templateUrl: 'card.html',\n  styleUrls: ['card.css'],\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  host: {\n    'class': 'mat-card mat-focus-indicator',\n    '[class._mat-animation-noopable]': '_animationMode === \"NoopAnimations\"',\n  }\n})\nexport class MatCard {\n  // @breaking-change 9.0.0 `_animationMode` parameter to be made required.\n  constructor(@Optional() @Inject(ANIMATION_MODULE_TYPE) public _animationMode?: string) {}\n}\n\n\n/**\n * Component intended to be used within the `<mat-card>` component. It adds styles for a\n * preset header section (i.e. a title, subtitle, and avatar layout).\n * @docs-private\n */\n@Component({\n  selector: 'mat-card-header',\n  templateUrl: 'card-header.html',\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  host: {'class': 'mat-card-header'}\n})\nexport class MatCardHeader {}\n\n\n/**\n * Component intended to be used within the `<mat-card>` component. It adds styles for a preset\n * layout that groups an image with a title section.\n * @docs-private\n */\n@Component({\n  selector: 'mat-card-title-group',\n  templateUrl: 'card-title-group.html',\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  host: {'class': 'mat-card-title-group'}\n})\nexport class MatCardTitleGroup {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgModule} from '@angular/core';\nimport {MatCommonModule} from '@angular/material/core';\nimport {\n  MatCard,\n  MatCardActions,\n  MatCardAvatar,\n  MatCardContent,\n  MatCardFooter,\n  MatCardHeader,\n  MatCardImage,\n  MatCardLgImage,\n  MatCardMdImage,\n  MatCardSmImage,\n  MatCardSubtitle,\n  MatCardTitle,\n  MatCardTitleGroup,\n  MatCardXlImage,\n} from './card';\n\n\n@NgModule({\n  imports: [MatCommonModule],\n  exports: [\n    MatCard,\n    MatCardHeader,\n    MatCardTitleGroup,\n    MatCardContent,\n    MatCardTitle,\n    MatCardSubtitle,\n    MatCardActions,\n    MatCardFooter,\n    MatCardSmImage,\n    MatCardMdImage,\n    MatCardLgImage,\n    MatCardImage,\n    MatCardXlImage,\n    MatCardAvatar,\n    MatCommonModule,\n  ],\n  declarations: [\n    MatCard, MatCardHeader, MatCardTitleGroup, MatCardContent, MatCardTitle, MatCardSubtitle,\n    MatCardActions, MatCardFooter, MatCardSmImage, MatCardMdImage, MatCardLgImage, MatCardImage,\n    MatCardXlImage, MatCardAvatar,\n  ],\n})\nexport class MatCardModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './card';\nexport * from './card-module';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","import { Subscriber } from '../Subscriber';\nimport { rxSubscriber as rxSubscriberSymbol } from '../symbol/rxSubscriber';\nimport { empty as emptyObserver } from '../Observer';\nexport function toSubscriber(nextOrObserver, error, complete) {\n    if (nextOrObserver) {\n        if (nextOrObserver instanceof Subscriber) {\n            return nextOrObserver;\n        }\n        if (nextOrObserver[rxSubscriberSymbol]) {\n            return nextOrObserver[rxSubscriberSymbol]();\n        }\n    }\n    if (!nextOrObserver && !error && !complete) {\n        return new Subscriber(emptyObserver);\n    }\n    return new Subscriber(nextOrObserver, error, complete);\n}\n//# sourceMappingURL=toSubscriber.js.map","// HACK: does nothing, because `toPromise` now lives on the `Observable` itself.\n// leaving this module here to prevent breakage.\n//# sourceMappingURL=toPromise.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Emits the single value at the specified `index` in a sequence of emissions\n * from the source Observable.\n *\n * <span class=\"informal\">Emits only the i-th value, then completes.</span>\n *\n * <img src=\"./img/elementAt.png\" width=\"100%\">\n *\n * `elementAt` returns an Observable that emits the item at the specified\n * `index` in the source Observable, or a default value if that `index` is out\n * of range and the `default` argument is provided. If the `default` argument is\n * not given and the `index` is out of range, the output Observable will emit an\n * `ArgumentOutOfRangeError` error.\n *\n * @example <caption>Emit only the third click event</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.elementAt(2);\n * result.subscribe(x => console.log(x));\n *\n * // Results in:\n * // click 1 = nothing\n * // click 2 = nothing\n * // click 3 = MouseEvent object logged to console\n *\n * @see {@link first}\n * @see {@link last}\n * @see {@link skip}\n * @see {@link single}\n * @see {@link take}\n *\n * @throws {ArgumentOutOfRangeError} When using `elementAt(i)`, it delivers an\n * ArgumentOutOrRangeError to the Observer's `error` callback if `i < 0` or the\n * Observable has completed before emitting the i-th `next` notification.\n *\n * @param {number} index Is the number `i` for the i-th source emission that has\n * happened since the subscription, starting from the number `0`.\n * @param {T} [defaultValue] The default value returned for missing indices.\n * @return {Observable} An Observable that emits a single item, if it is found.\n * Otherwise, will emit the default value if given. If not, then emits an error.\n * @method elementAt\n * @owner Observable\n */\nfunction elementAt(index, defaultValue) {\n    return operators_1.elementAt.apply(undefined, arguments)(this);\n}\nexports.elementAt = elementAt;\n//# sourceMappingURL=elementAt.js.map","import { EmptyError } from '../util/EmptyError';\nimport { Subscriber } from '../Subscriber';\nexport function throwIfEmpty(errorFactory = defaultErrorFactory) {\n    return (source) => {\n        return source.lift(new ThrowIfEmptyOperator(errorFactory));\n    };\n}\nclass ThrowIfEmptyOperator {\n    constructor(errorFactory) {\n        this.errorFactory = errorFactory;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new ThrowIfEmptySubscriber(subscriber, this.errorFactory));\n    }\n}\nclass ThrowIfEmptySubscriber extends Subscriber {\n    constructor(destination, errorFactory) {\n        super(destination);\n        this.errorFactory = errorFactory;\n        this.hasValue = false;\n    }\n    _next(value) {\n        this.hasValue = true;\n        this.destination.next(value);\n    }\n    _complete() {\n        if (!this.hasValue) {\n            let err;\n            try {\n                err = this.errorFactory();\n            }\n            catch (e) {\n                err = e;\n            }\n            this.destination.error(err);\n        }\n        else {\n            return this.destination.complete();\n        }\n    }\n}\nfunction defaultErrorFactory() {\n    return new EmptyError();\n}\n//# sourceMappingURL=throwIfEmpty.js.map","import { Observable } from './Observable';\nimport { Subscriber } from './Subscriber';\nimport { Subscription } from './Subscription';\nimport { ObjectUnsubscribedError } from './util/ObjectUnsubscribedError';\nimport { SubjectSubscription } from './SubjectSubscription';\nimport { rxSubscriber as rxSubscriberSymbol } from '../internal/symbol/rxSubscriber';\nexport class SubjectSubscriber extends Subscriber {\n    constructor(destination) {\n        super(destination);\n        this.destination = destination;\n    }\n}\nexport class Subject extends Observable {\n    constructor() {\n        super();\n        this.observers = [];\n        this.closed = false;\n        this.isStopped = false;\n        this.hasError = false;\n        this.thrownError = null;\n    }\n    [rxSubscriberSymbol]() {\n        return new SubjectSubscriber(this);\n    }\n    lift(operator) {\n        const subject = new AnonymousSubject(this, this);\n        subject.operator = operator;\n        return subject;\n    }\n    next(value) {\n        if (this.closed) {\n            throw new ObjectUnsubscribedError();\n        }\n        if (!this.isStopped) {\n            const { observers } = this;\n            const len = observers.length;\n            const copy = observers.slice();\n            for (let i = 0; i < len; i++) {\n                copy[i].next(value);\n            }\n        }\n    }\n    error(err) {\n        if (this.closed) {\n            throw new ObjectUnsubscribedError();\n        }\n        this.hasError = true;\n        this.thrownError = err;\n        this.isStopped = true;\n        const { observers } = this;\n        const len = observers.length;\n        const copy = observers.slice();\n        for (let i = 0; i < len; i++) {\n            copy[i].error(err);\n        }\n        this.observers.length = 0;\n    }\n    complete() {\n        if (this.closed) {\n            throw new ObjectUnsubscribedError();\n        }\n        this.isStopped = true;\n        const { observers } = this;\n        const len = observers.length;\n        const copy = observers.slice();\n        for (let i = 0; i < len; i++) {\n            copy[i].complete();\n        }\n        this.observers.length = 0;\n    }\n    unsubscribe() {\n        this.isStopped = true;\n        this.closed = true;\n        this.observers = null;\n    }\n    _trySubscribe(subscriber) {\n        if (this.closed) {\n            throw new ObjectUnsubscribedError();\n        }\n        else {\n            return super._trySubscribe(subscriber);\n        }\n    }\n    _subscribe(subscriber) {\n        if (this.closed) {\n            throw new ObjectUnsubscribedError();\n        }\n        else if (this.hasError) {\n            subscriber.error(this.thrownError);\n            return Subscription.EMPTY;\n        }\n        else if (this.isStopped) {\n            subscriber.complete();\n            return Subscription.EMPTY;\n        }\n        else {\n            this.observers.push(subscriber);\n            return new SubjectSubscription(this, subscriber);\n        }\n    }\n    asObservable() {\n        const observable = new Observable();\n        observable.source = this;\n        return observable;\n    }\n}\nSubject.create = (destination, source) => {\n    return new AnonymousSubject(destination, source);\n};\nexport class AnonymousSubject extends Subject {\n    constructor(destination, source) {\n        super();\n        this.destination = destination;\n        this.source = source;\n    }\n    next(value) {\n        const { destination } = this;\n        if (destination && destination.next) {\n            destination.next(value);\n        }\n    }\n    error(err) {\n        const { destination } = this;\n        if (destination && destination.error) {\n            this.destination.error(err);\n        }\n    }\n    complete() {\n        const { destination } = this;\n        if (destination && destination.complete) {\n            this.destination.complete();\n        }\n    }\n    _subscribe(subscriber) {\n        const { source } = this;\n        if (source) {\n            return this.source.subscribe(subscriber);\n        }\n        else {\n            return Subscription.EMPTY;\n        }\n    }\n}\n//# sourceMappingURL=Subject.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.empty = rxjs_1.empty;\n//# sourceMappingURL=empty.js.map","import getPrototypeOf from \"./getPrototypeOf\";\nexport default function _superPropBase(object, property) {\n  while (!Object.prototype.hasOwnProperty.call(object, property)) {\n    object = getPrototypeOf(object);\n    if (object === null) break;\n  }\n\n  return object;\n}","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {coerceNumberProperty, NumberInput} from '@angular/cdk/coercion';\nimport {Platform, _getShadowRoot} from '@angular/cdk/platform';\nimport {DOCUMENT} from '@angular/common';\nimport {\n  ChangeDetectionStrategy,\n  Component,\n  ElementRef,\n  Inject,\n  InjectionToken,\n  Input,\n  Optional,\n  ViewEncapsulation,\n  OnInit,\n} from '@angular/core';\nimport {CanColor, CanColorCtor, mixinColor} from '@angular/material/core';\nimport {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';\n\n\n/** Possible mode for a progress spinner. */\nexport type ProgressSpinnerMode = 'determinate' | 'indeterminate';\n\n/**\n * Base reference size of the spinner.\n * @docs-private\n */\nconst BASE_SIZE = 100;\n\n/**\n * Base reference stroke width of the spinner.\n * @docs-private\n */\nconst BASE_STROKE_WIDTH = 10;\n\n// Boilerplate for applying mixins to MatProgressSpinner.\n/** @docs-private */\nclass MatProgressSpinnerBase {\n  constructor(public _elementRef: ElementRef) {}\n}\nconst _MatProgressSpinnerMixinBase: CanColorCtor & typeof MatProgressSpinnerBase =\n    mixinColor(MatProgressSpinnerBase, 'primary');\n\n/** Default `mat-progress-spinner` options that can be overridden. */\nexport interface MatProgressSpinnerDefaultOptions {\n  /** Diameter of the spinner. */\n  diameter?: number;\n  /** Width of the spinner's stroke. */\n  strokeWidth?: number;\n  /**\n   * Whether the animations should be force to be enabled, ignoring if the current environment is\n   * using NoopAnimationsModule.\n   */\n  _forceAnimations?: boolean;\n}\n\n/** Injection token to be used to override the default options for `mat-progress-spinner`. */\nexport const MAT_PROGRESS_SPINNER_DEFAULT_OPTIONS =\n    new InjectionToken<MatProgressSpinnerDefaultOptions>('mat-progress-spinner-default-options', {\n      providedIn: 'root',\n      factory: MAT_PROGRESS_SPINNER_DEFAULT_OPTIONS_FACTORY,\n    });\n\n/** @docs-private */\nexport function MAT_PROGRESS_SPINNER_DEFAULT_OPTIONS_FACTORY(): MatProgressSpinnerDefaultOptions {\n  return {diameter: BASE_SIZE};\n}\n\n// .0001 percentage difference is necessary in order to avoid unwanted animation frames\n// for example because the animation duration is 4 seconds, .1% accounts to 4ms\n// which are enough to see the flicker described in\n// https://github.com/angular/components/issues/8984\nconst INDETERMINATE_ANIMATION_TEMPLATE = `\n @keyframes mat-progress-spinner-stroke-rotate-DIAMETER {\n    0%      { stroke-dashoffset: START_VALUE;  transform: rotate(0); }\n    12.5%   { stroke-dashoffset: END_VALUE;    transform: rotate(0); }\n    12.5001%  { stroke-dashoffset: END_VALUE;    transform: rotateX(180deg) rotate(72.5deg); }\n    25%     { stroke-dashoffset: START_VALUE;  transform: rotateX(180deg) rotate(72.5deg); }\n\n    25.0001%   { stroke-dashoffset: START_VALUE;  transform: rotate(270deg); }\n    37.5%   { stroke-dashoffset: END_VALUE;    transform: rotate(270deg); }\n    37.5001%  { stroke-dashoffset: END_VALUE;    transform: rotateX(180deg) rotate(161.5deg); }\n    50%     { stroke-dashoffset: START_VALUE;  transform: rotateX(180deg) rotate(161.5deg); }\n\n    50.0001%  { stroke-dashoffset: START_VALUE;  transform: rotate(180deg); }\n    62.5%   { stroke-dashoffset: END_VALUE;    transform: rotate(180deg); }\n    62.5001%  { stroke-dashoffset: END_VALUE;    transform: rotateX(180deg) rotate(251.5deg); }\n    75%     { stroke-dashoffset: START_VALUE;  transform: rotateX(180deg) rotate(251.5deg); }\n\n    75.0001%  { stroke-dashoffset: START_VALUE;  transform: rotate(90deg); }\n    87.5%   { stroke-dashoffset: END_VALUE;    transform: rotate(90deg); }\n    87.5001%  { stroke-dashoffset: END_VALUE;    transform: rotateX(180deg) rotate(341.5deg); }\n    100%    { stroke-dashoffset: START_VALUE;  transform: rotateX(180deg) rotate(341.5deg); }\n  }\n`;\n\n/**\n * `<mat-progress-spinner>` component.\n */\n@Component({\n  selector: 'mat-progress-spinner',\n  exportAs: 'matProgressSpinner',\n  host: {\n    'role': 'progressbar',\n    'class': 'mat-progress-spinner',\n    '[class._mat-animation-noopable]': `_noopAnimations`,\n    '[style.width.px]': 'diameter',\n    '[style.height.px]': 'diameter',\n    '[attr.aria-valuemin]': 'mode === \"determinate\" ? 0 : null',\n    '[attr.aria-valuemax]': 'mode === \"determinate\" ? 100 : null',\n    '[attr.aria-valuenow]': 'mode === \"determinate\" ? value : null',\n    '[attr.mode]': 'mode',\n  },\n  inputs: ['color'],\n  templateUrl: 'progress-spinner.html',\n  styleUrls: ['progress-spinner.css'],\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  encapsulation: ViewEncapsulation.None,\n})\nexport class MatProgressSpinner extends _MatProgressSpinnerMixinBase implements OnInit, CanColor {\n  private _diameter = BASE_SIZE;\n  private _value = 0;\n  private _strokeWidth: number;\n  private _fallbackAnimation = false;\n\n  /**\n   * Element to which we should add the generated style tags for the indeterminate animation.\n   * For most elements this is the document, but for the ones in the Shadow DOM we need to\n   * use the shadow root.\n   */\n  private _styleRoot: Node;\n\n  /**\n   * Tracks diameters of existing instances to de-dupe generated styles (default d = 100).\n   * We need to keep track of which elements the diameters were attached to, because for\n   * elements in the Shadow DOM the style tags are attached to the shadow root, rather\n   * than the document head.\n   */\n  private static _diameters = new WeakMap<Node, Set<number>>();\n\n  /** Whether the _mat-animation-noopable class should be applied, disabling animations.  */\n  _noopAnimations: boolean;\n\n  /** A string that is used for setting the spinner animation-name CSS property */\n  _spinnerAnimationLabel: string;\n\n  /** The diameter of the progress spinner (will set width and height of svg). */\n  @Input()\n  get diameter(): number { return this._diameter; }\n  set diameter(size: number) {\n    this._diameter = coerceNumberProperty(size);\n    this._spinnerAnimationLabel = this._getSpinnerAnimationLabel();\n\n    // If this is set before `ngOnInit`, the style root may not have been resolved yet.\n    if (!this._fallbackAnimation && this._styleRoot) {\n      this._attachStyleNode();\n    }\n  }\n\n  /** Stroke width of the progress spinner. */\n  @Input()\n  get strokeWidth(): number {\n    return this._strokeWidth || this.diameter / 10;\n  }\n  set strokeWidth(value: number) {\n    this._strokeWidth = coerceNumberProperty(value);\n  }\n\n  /** Mode of the progress circle */\n  @Input() mode: ProgressSpinnerMode = 'determinate';\n\n  /** Value of the progress circle. */\n  @Input()\n  get value(): number {\n    return this.mode === 'determinate' ? this._value : 0;\n  }\n  set value(newValue: number) {\n    this._value = Math.max(0, Math.min(100, coerceNumberProperty(newValue)));\n  }\n\n  constructor(public _elementRef: ElementRef<HTMLElement>,\n              platform: Platform,\n              @Optional() @Inject(DOCUMENT) private _document: any,\n              @Optional() @Inject(ANIMATION_MODULE_TYPE) animationMode: string,\n              @Inject(MAT_PROGRESS_SPINNER_DEFAULT_OPTIONS)\n                  defaults?: MatProgressSpinnerDefaultOptions) {\n\n    super(_elementRef);\n\n    const trackedDiameters = MatProgressSpinner._diameters;\n    this._spinnerAnimationLabel = this._getSpinnerAnimationLabel();\n\n    // The base size is already inserted via the component's structural styles. We still\n    // need to track it so we don't end up adding the same styles again.\n    if (!trackedDiameters.has(_document.head)) {\n      trackedDiameters.set(_document.head, new Set<number>([BASE_SIZE]));\n    }\n\n    this._fallbackAnimation = platform.EDGE || platform.TRIDENT;\n    this._noopAnimations = animationMode === 'NoopAnimations' &&\n        (!!defaults && !defaults._forceAnimations);\n\n    if (defaults) {\n      if (defaults.diameter) {\n        this.diameter = defaults.diameter;\n      }\n\n      if (defaults.strokeWidth) {\n        this.strokeWidth = defaults.strokeWidth;\n      }\n    }\n  }\n\n  ngOnInit() {\n    const element = this._elementRef.nativeElement;\n\n    // Note that we need to look up the root node in ngOnInit, rather than the constructor, because\n    // Angular seems to create the element outside the shadow root and then moves it inside, if the\n    // node is inside an `ngIf` and a ShadowDom-encapsulated component.\n    this._styleRoot = _getShadowRoot(element) || this._document.head;\n    this._attachStyleNode();\n\n    // On IE and Edge, we can't animate the `stroke-dashoffset`\n    // reliably so we fall back to a non-spec animation.\n    const animationClass =\n      `mat-progress-spinner-indeterminate${this._fallbackAnimation ? '-fallback' : ''}-animation`;\n\n    element.classList.add(animationClass);\n  }\n\n  /** The radius of the spinner, adjusted for stroke width. */\n  _getCircleRadius() {\n    return (this.diameter - BASE_STROKE_WIDTH) / 2;\n  }\n\n  /** The view box of the spinner's svg element. */\n  _getViewBox() {\n    const viewBox = this._getCircleRadius() * 2 + this.strokeWidth;\n    return `0 0 ${viewBox} ${viewBox}`;\n  }\n\n  /** The stroke circumference of the svg circle. */\n  _getStrokeCircumference(): number {\n    return 2 * Math.PI * this._getCircleRadius();\n  }\n\n  /** The dash offset of the svg circle. */\n  _getStrokeDashOffset() {\n    if (this.mode === 'determinate') {\n      return this._getStrokeCircumference() * (100 - this._value) / 100;\n    }\n\n    // In fallback mode set the circle to 80% and rotate it with CSS.\n    if (this._fallbackAnimation && this.mode === 'indeterminate') {\n      return this._getStrokeCircumference() * 0.2;\n    }\n\n    return null;\n  }\n\n  /** Stroke width of the circle in percent. */\n  _getCircleStrokeWidth() {\n    return this.strokeWidth / this.diameter * 100;\n  }\n\n  /** Dynamically generates a style tag containing the correct animation for this diameter. */\n  private _attachStyleNode(): void {\n    const styleRoot = this._styleRoot;\n    const currentDiameter = this._diameter;\n    const diameters = MatProgressSpinner._diameters;\n    let diametersForElement = diameters.get(styleRoot);\n\n    if (!diametersForElement || !diametersForElement.has(currentDiameter)) {\n      const styleTag: HTMLStyleElement = this._document.createElement('style');\n      styleTag.setAttribute('mat-spinner-animation', this._spinnerAnimationLabel);\n      styleTag.textContent = this._getAnimationText();\n      styleRoot.appendChild(styleTag);\n\n      if (!diametersForElement) {\n        diametersForElement = new Set<number>();\n        diameters.set(styleRoot, diametersForElement);\n      }\n\n      diametersForElement.add(currentDiameter);\n    }\n  }\n\n  /** Generates animation styles adjusted for the spinner's diameter. */\n  private _getAnimationText(): string {\n    const strokeCircumference = this._getStrokeCircumference();\n    return INDETERMINATE_ANIMATION_TEMPLATE\n        // Animation should begin at 5% and end at 80%\n        .replace(/START_VALUE/g, `${0.95 * strokeCircumference}`)\n        .replace(/END_VALUE/g, `${0.2 * strokeCircumference}`)\n        .replace(/DIAMETER/g, `${this._spinnerAnimationLabel}`);\n  }\n\n  /** Returns the circle diameter formatted for use with the animation-name CSS property. */\n  private _getSpinnerAnimationLabel(): string {\n    // The string of a float point number will include a period ‘.’ character,\n    // which is not valid for a CSS animation-name.\n    return this.diameter.toString().replace('.', '_');\n  }\n\n  static ngAcceptInputType_diameter: NumberInput;\n  static ngAcceptInputType_strokeWidth: NumberInput;\n  static ngAcceptInputType_value: NumberInput;\n}\n\n\n/**\n * `<mat-spinner>` component.\n *\n * This is a component definition to be used as a convenience reference to create an\n * indeterminate `<mat-progress-spinner>` instance.\n */\n@Component({\n  selector: 'mat-spinner',\n  host: {\n    'role': 'progressbar',\n    'mode': 'indeterminate',\n    'class': 'mat-spinner mat-progress-spinner',\n    '[class._mat-animation-noopable]': `_noopAnimations`,\n    '[style.width.px]': 'diameter',\n    '[style.height.px]': 'diameter',\n  },\n  inputs: ['color'],\n  templateUrl: 'progress-spinner.html',\n  styleUrls: ['progress-spinner.css'],\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  encapsulation: ViewEncapsulation.None,\n})\nexport class MatSpinner extends MatProgressSpinner {\n  constructor(elementRef: ElementRef<HTMLElement>, platform: Platform,\n              @Optional() @Inject(DOCUMENT) document: any,\n              @Optional() @Inject(ANIMATION_MODULE_TYPE) animationMode: string,\n              @Inject(MAT_PROGRESS_SPINNER_DEFAULT_OPTIONS)\n                  defaults?: MatProgressSpinnerDefaultOptions) {\n    super(elementRef, platform, document, animationMode, defaults);\n    this.mode = 'indeterminate';\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {NgModule} from '@angular/core';\nimport {CommonModule} from '@angular/common';\nimport {MatCommonModule} from '@angular/material/core';\nimport {MatProgressSpinner, MatSpinner} from './progress-spinner';\n\n\n@NgModule({\n  imports: [MatCommonModule, CommonModule],\n  exports: [\n    MatProgressSpinner,\n    MatSpinner,\n    MatCommonModule\n  ],\n  declarations: [\n    MatProgressSpinner,\n    MatSpinner\n  ],\n})\nexport class MatProgressSpinnerModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './progress-spinner-module';\nexport {\n  MatProgressSpinner,\n  MatSpinner,\n  MAT_PROGRESS_SPINNER_DEFAULT_OPTIONS,\n  ProgressSpinnerMode,\n  MatProgressSpinnerDefaultOptions,\n  MAT_PROGRESS_SPINNER_DEFAULT_OPTIONS_FACTORY,\n} from './progress-spinner';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Branch out the source Observable values as a nested Observable whenever\n * `windowBoundaries` emits.\n *\n * <span class=\"informal\">It's like {@link buffer}, but emits a nested Observable\n * instead of an array.</span>\n *\n * <img src=\"./img/window.png\" width=\"100%\">\n *\n * Returns an Observable that emits windows of items it collects from the source\n * Observable. The output Observable emits connected, non-overlapping\n * windows. It emits the current window and opens a new one whenever the\n * Observable `windowBoundaries` emits an item. Because each window is an\n * Observable, the output is a higher-order Observable.\n *\n * @example <caption>In every window of 1 second each, emit at most 2 click events</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var interval = Rx.Observable.interval(1000);\n * var result = clicks.window(interval)\n *   .map(win => win.take(2)) // each window has at most 2 emissions\n *   .mergeAll(); // flatten the Observable-of-Observables\n * result.subscribe(x => console.log(x));\n *\n * @see {@link windowCount}\n * @see {@link windowTime}\n * @see {@link windowToggle}\n * @see {@link windowWhen}\n * @see {@link buffer}\n *\n * @param {Observable<any>} windowBoundaries An Observable that completes the\n * previous window and starts a new window.\n * @return {Observable<Observable<T>>} An Observable of windows, which are\n * Observables emitting values of the source Observable.\n * @method window\n * @owner Observable\n */\nfunction window(windowBoundaries) {\n    return operators_1.window(windowBoundaries)(this);\n}\nexports.window = window;\n//# sourceMappingURL=window.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {\n  animate,\n  state,\n  style,\n  transition,\n  trigger,\n  AnimationTriggerMetadata,\n} from '@angular/animations';\n\n/**\n * Animations used by the Material drawers.\n * @docs-private\n */\nexport const matDrawerAnimations: {\n  readonly transformDrawer: AnimationTriggerMetadata;\n} = {\n  /** Animation that slides a drawer in and out. */\n  transformDrawer: trigger('transform', [\n    // We remove the `transform` here completely, rather than setting it to zero, because:\n    // 1. Having a transform can cause elements with ripples or an animated\n    //    transform to shift around in Chrome with an RTL layout (see #10023).\n    // 2. 3d transforms causes text to appear blurry on IE and Edge.\n    state('open, open-instant', style({\n      'transform': 'none',\n      'visibility': 'visible',\n    })),\n    state('void', style({\n      // Avoids the shadow showing up when closed in SSR.\n      'box-shadow': 'none',\n      'visibility': 'hidden',\n    })),\n    transition('void => open-instant', animate('0ms')),\n    transition('void <=> open, open-instant => void',\n        animate('400ms cubic-bezier(0.25, 0.8, 0.25, 1)'))\n  ])\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {AnimationEvent} from '@angular/animations';\nimport {FocusMonitor, FocusOrigin, FocusTrap, FocusTrapFactory} from '@angular/cdk/a11y';\nimport {Directionality} from '@angular/cdk/bidi';\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {ESCAPE, hasModifierKey} from '@angular/cdk/keycodes';\nimport {Platform} from '@angular/cdk/platform';\nimport {CdkScrollable, ScrollDispatcher, ViewportRuler} from '@angular/cdk/scrolling';\nimport {DOCUMENT} from '@angular/common';\nimport {\n  AfterContentChecked,\n  AfterContentInit,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ContentChild,\n  ContentChildren,\n  DoCheck,\n  ElementRef,\n  EventEmitter,\n  forwardRef,\n  Inject,\n  InjectionToken,\n  Input,\n  NgZone,\n  OnDestroy,\n  Optional,\n  Output,\n  QueryList,\n  ViewChild,\n  ViewEncapsulation,\n  HostListener,\n  HostBinding,\n} from '@angular/core';\nimport {fromEvent, merge, Observable, Subject} from 'rxjs';\nimport {\n  debounceTime,\n  filter,\n  map,\n  startWith,\n  take,\n  takeUntil,\n  distinctUntilChanged,\n  mapTo,\n} from 'rxjs/operators';\nimport {matDrawerAnimations} from './drawer-animations';\nimport {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';\n\n\n/**\n * Throws an exception when two MatDrawer are matching the same position.\n * @docs-private\n */\nexport function throwMatDuplicatedDrawerError(position: string) {\n  throw Error(`A drawer was already declared for 'position=\"${position}\"'`);\n}\n\n\n/** Result of the toggle promise that indicates the state of the drawer. */\nexport type MatDrawerToggleResult = 'open' | 'close';\n\n/** Drawer and SideNav display modes. */\nexport type MatDrawerMode = 'over' | 'push' | 'side';\n\n/** Configures whether drawers should use auto sizing by default. */\nexport const MAT_DRAWER_DEFAULT_AUTOSIZE =\n    new InjectionToken<boolean>('MAT_DRAWER_DEFAULT_AUTOSIZE', {\n      providedIn: 'root',\n      factory: MAT_DRAWER_DEFAULT_AUTOSIZE_FACTORY,\n    });\n\n\n/**\n * Used to provide a drawer container to a drawer while avoiding circular references.\n * @docs-private\n */\nexport const MAT_DRAWER_CONTAINER = new InjectionToken('MAT_DRAWER_CONTAINER');\n\n/** @docs-private */\nexport function MAT_DRAWER_DEFAULT_AUTOSIZE_FACTORY(): boolean {\n  return false;\n}\n\n@Component({\n  selector: 'mat-drawer-content',\n  template: '<ng-content></ng-content>',\n  host: {\n    'class': 'mat-drawer-content',\n    '[style.margin-left.px]': '_container._contentMargins.left',\n    '[style.margin-right.px]': '_container._contentMargins.right',\n  },\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  encapsulation: ViewEncapsulation.None,\n})\nexport class MatDrawerContent extends CdkScrollable implements AfterContentInit {\n  constructor(\n      private _changeDetectorRef: ChangeDetectorRef,\n      @Inject(forwardRef(() => MatDrawerContainer)) public _container: MatDrawerContainer,\n      elementRef: ElementRef<HTMLElement>,\n      scrollDispatcher: ScrollDispatcher,\n      ngZone: NgZone) {\n    super(elementRef, scrollDispatcher, ngZone);\n  }\n\n  ngAfterContentInit() {\n    this._container._contentMarginChanges.subscribe(() => {\n      this._changeDetectorRef.markForCheck();\n    });\n  }\n}\n\n\n/**\n * This component corresponds to a drawer that can be opened on the drawer container.\n */\n@Component({\n  selector: 'mat-drawer',\n  exportAs: 'matDrawer',\n  templateUrl: 'drawer.html',\n  animations: [matDrawerAnimations.transformDrawer],\n  host: {\n    'class': 'mat-drawer',\n    // must prevent the browser from aligning text based on value\n    '[attr.align]': 'null',\n    '[class.mat-drawer-end]': 'position === \"end\"',\n    '[class.mat-drawer-over]': 'mode === \"over\"',\n    '[class.mat-drawer-push]': 'mode === \"push\"',\n    '[class.mat-drawer-side]': 'mode === \"side\"',\n    '[class.mat-drawer-opened]': 'opened',\n    'tabIndex': '-1',\n  },\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  encapsulation: ViewEncapsulation.None,\n})\nexport class MatDrawer implements AfterContentInit, AfterContentChecked, OnDestroy {\n  private _focusTrap: FocusTrap;\n  private _elementFocusedBeforeDrawerWasOpened: HTMLElement | null = null;\n\n  /** Whether the drawer is initialized. Used for disabling the initial animation. */\n  private _enableAnimations = false;\n\n  /** The side that the drawer is attached to. */\n  @Input()\n  get position(): 'start' | 'end' { return this._position; }\n  set position(value: 'start' | 'end') {\n    // Make sure we have a valid value.\n    value = value === 'end' ? 'end' : 'start';\n    if (value != this._position) {\n      this._position = value;\n      this.onPositionChanged.emit();\n    }\n  }\n  private _position: 'start' | 'end' = 'start';\n\n  /** Mode of the drawer; one of 'over', 'push' or 'side'. */\n  @Input()\n  get mode(): MatDrawerMode { return this._mode; }\n  set mode(value: MatDrawerMode) {\n    this._mode = value;\n    this._updateFocusTrapState();\n    this._modeChanged.next();\n  }\n  private _mode: MatDrawerMode = 'over';\n\n  /** Whether the drawer can be closed with the escape key or by clicking on the backdrop. */\n  @Input()\n  get disableClose(): boolean { return this._disableClose; }\n  set disableClose(value: boolean) { this._disableClose = coerceBooleanProperty(value); }\n  private _disableClose: boolean = false;\n\n  /**\n   * Whether the drawer should focus the first focusable element automatically when opened.\n   * Defaults to false in when `mode` is set to `side`, otherwise defaults to `true`. If explicitly\n   * enabled, focus will be moved into the sidenav in `side` mode as well.\n   */\n  @Input()\n  get autoFocus(): boolean {\n    const value = this._autoFocus;\n\n    // Note that usually we disable auto focusing in `side` mode, because we don't know how the\n    // sidenav is being used, but in some cases it still makes sense to do it. If the consumer\n    // explicitly enabled `autoFocus`, we take it as them always wanting to enable it.\n    return value == null ? this.mode !== 'side' : value;\n  }\n  set autoFocus(value: boolean) { this._autoFocus = coerceBooleanProperty(value); }\n  private _autoFocus: boolean | undefined;\n\n  /**\n   * Whether the drawer is opened. We overload this because we trigger an event when it\n   * starts or end.\n   */\n  @Input()\n  get opened(): boolean { return this._opened; }\n  set opened(value: boolean) { this.toggle(coerceBooleanProperty(value)); }\n  private _opened: boolean = false;\n\n  /** How the sidenav was opened (keypress, mouse click etc.) */\n  private _openedVia: FocusOrigin | null;\n\n  /** Emits whenever the drawer has started animating. */\n  _animationStarted = new Subject<AnimationEvent>();\n\n  /** Emits whenever the drawer is done animating. */\n  _animationEnd = new Subject<AnimationEvent>();\n\n  /** Current state of the sidenav animation. */\n  // @HostBinding is used in the class as it is expected to be extended.  Since @Component decorator\n  // metadata is not inherited by child classes, instead the host binding data is defined in a way\n  // that can be inherited.\n  // tslint:disable:no-host-decorator-in-concrete\n  @HostBinding('@transform')\n  _animationState: 'open-instant' | 'open' | 'void' = 'void';\n\n  /** Event emitted when the drawer open state is changed. */\n  @Output() readonly openedChange: EventEmitter<boolean> =\n      // Note this has to be async in order to avoid some issues with two-bindings (see #8872).\n      new EventEmitter<boolean>(/* isAsync */true);\n\n  /** Event emitted when the drawer has been opened. */\n  @Output('opened')\n  _openedStream = this.openedChange.pipe(filter(o => o), map(() => {}));\n\n  /** Event emitted when the drawer has started opening. */\n  @Output()\n  readonly openedStart: Observable<void> = this._animationStarted.pipe(\n    filter(e => e.fromState !== e.toState && e.toState.indexOf('open') === 0),\n    mapTo(undefined)\n  );\n\n  /** Event emitted when the drawer has been closed. */\n  @Output('closed')\n  _closedStream = this.openedChange.pipe(filter(o => !o), map(() => {}));\n\n  /** Event emitted when the drawer has started closing. */\n  @Output()\n  readonly closedStart: Observable<void> = this._animationStarted.pipe(\n    filter(e => e.fromState !== e.toState && e.toState === 'void'),\n    mapTo(undefined)\n  );\n\n  /** Emits when the component is destroyed. */\n  private readonly _destroyed = new Subject<void>();\n\n  /** Event emitted when the drawer's position changes. */\n  // tslint:disable-next-line:no-output-on-prefix\n  @Output('positionChanged') onPositionChanged: EventEmitter<void> = new EventEmitter<void>();\n\n  /**\n   * An observable that emits when the drawer mode changes. This is used by the drawer container to\n   * to know when to when the mode changes so it can adapt the margins on the content.\n   */\n  readonly _modeChanged = new Subject<void>();\n\n  constructor(private _elementRef: ElementRef<HTMLElement>,\n              private _focusTrapFactory: FocusTrapFactory,\n              private _focusMonitor: FocusMonitor,\n              private _platform: Platform,\n              private _ngZone: NgZone,\n              @Optional() @Inject(DOCUMENT) private _doc: any,\n              @Optional() @Inject(MAT_DRAWER_CONTAINER) public _container?: MatDrawerContainer) {\n\n    this.openedChange.subscribe((opened: boolean) => {\n      if (opened) {\n        if (this._doc) {\n          this._elementFocusedBeforeDrawerWasOpened = this._doc.activeElement as HTMLElement;\n        }\n\n        this._takeFocus();\n      } else if (this._isFocusWithinDrawer()) {\n        this._restoreFocus();\n      }\n    });\n\n    /**\n     * Listen to `keydown` events outside the zone so that change detection is not run every\n     * time a key is pressed. Instead we re-enter the zone only if the `ESC` key is pressed\n     * and we don't have close disabled.\n     */\n    this._ngZone.runOutsideAngular(() => {\n        (fromEvent(this._elementRef.nativeElement, 'keydown') as Observable<KeyboardEvent>).pipe(\n            filter(event => {\n              return event.keyCode === ESCAPE && !this.disableClose && !hasModifierKey(event);\n            }),\n            takeUntil(this._destroyed)\n        ).subscribe(event => this._ngZone.run(() => {\n            this.close();\n            event.stopPropagation();\n            event.preventDefault();\n        }));\n    });\n\n    // We need a Subject with distinctUntilChanged, because the `done` event\n    // fires twice on some browsers. See https://github.com/angular/angular/issues/24084\n    this._animationEnd.pipe(distinctUntilChanged((x, y) => {\n      return x.fromState === y.fromState && x.toState === y.toState;\n    })).subscribe((event: AnimationEvent) => {\n      const {fromState, toState} = event;\n\n      if ((toState.indexOf('open') === 0 && fromState === 'void') ||\n          (toState === 'void' && fromState.indexOf('open') === 0)) {\n        this.openedChange.emit(this._opened);\n      }\n    });\n  }\n\n  /**\n   * Moves focus into the drawer. Note that this works even if\n   * the focus trap is disabled in `side` mode.\n   */\n  private _takeFocus() {\n    if (!this.autoFocus || !this._focusTrap) {\n      return;\n    }\n\n    this._focusTrap.focusInitialElementWhenReady().then(hasMovedFocus => {\n      // If there were no focusable elements, focus the sidenav itself so the keyboard navigation\n      // still works. We need to check that `focus` is a function due to Universal.\n      if (!hasMovedFocus && typeof this._elementRef.nativeElement.focus === 'function') {\n        this._elementRef.nativeElement.focus();\n      }\n    });\n  }\n\n  /**\n   * Restores focus to the element that was originally focused when the drawer opened.\n   * If no element was focused at that time, the focus will be restored to the drawer.\n   */\n  private _restoreFocus() {\n    if (!this.autoFocus) {\n      return;\n    }\n\n    // Note that we don't check via `instanceof HTMLElement` so that we can cover SVGs as well.\n    if (this._elementFocusedBeforeDrawerWasOpened) {\n      this._focusMonitor.focusVia(this._elementFocusedBeforeDrawerWasOpened, this._openedVia);\n    } else {\n      this._elementRef.nativeElement.blur();\n    }\n\n    this._elementFocusedBeforeDrawerWasOpened = null;\n    this._openedVia = null;\n  }\n\n  /** Whether focus is currently within the drawer. */\n  private _isFocusWithinDrawer(): boolean {\n    const activeEl = this._doc?.activeElement;\n    return !!activeEl && this._elementRef.nativeElement.contains(activeEl);\n  }\n\n  ngAfterContentInit() {\n    this._focusTrap = this._focusTrapFactory.create(this._elementRef.nativeElement);\n    this._updateFocusTrapState();\n  }\n\n  ngAfterContentChecked() {\n    // Enable the animations after the lifecycle hooks have run, in order to avoid animating\n    // drawers that are open by default. When we're on the server, we shouldn't enable the\n    // animations, because we don't want the drawer to animate the first time the user sees\n    // the page.\n    if (this._platform.isBrowser) {\n      this._enableAnimations = true;\n    }\n  }\n\n  ngOnDestroy() {\n    if (this._focusTrap) {\n      this._focusTrap.destroy();\n    }\n\n    this._animationStarted.complete();\n    this._animationEnd.complete();\n    this._modeChanged.complete();\n    this._destroyed.next();\n    this._destroyed.complete();\n  }\n\n  /**\n   * Open the drawer.\n   * @param openedVia Whether the drawer was opened by a key press, mouse click or programmatically.\n   * Used for focus management after the sidenav is closed.\n   */\n  open(openedVia?: FocusOrigin): Promise<MatDrawerToggleResult> {\n    return this.toggle(true, openedVia);\n  }\n\n  /** Close the drawer. */\n  close(): Promise<MatDrawerToggleResult> {\n    return this.toggle(false);\n  }\n\n  /** Closes the drawer with context that the backdrop was clicked. */\n  _closeViaBackdropClick(): Promise<MatDrawerToggleResult> {\n    // If the drawer is closed upon a backdrop click, we always want to restore focus. We\n    // don't need to check whether focus is currently in the drawer, as clicking on the\n    // backdrop causes blurring of the active element.\n    return this._setOpen(/* isOpen */ false, /* restoreFocus */ true);\n  }\n\n  /**\n   * Toggle this drawer.\n   * @param isOpen Whether the drawer should be open.\n   * @param openedVia Whether the drawer was opened by a key press, mouse click or programmatically.\n   * Used for focus management after the sidenav is closed.\n   */\n  toggle(isOpen: boolean = !this.opened, openedVia?: FocusOrigin)\n      : Promise<MatDrawerToggleResult> {\n    // If the focus is currently inside the drawer content and we are closing the drawer,\n    // restore the focus to the initially focused element (when the drawer opened).\n    return this._setOpen(\n        isOpen, /* restoreFocus */ !isOpen && this._isFocusWithinDrawer(), openedVia);\n  }\n\n  /**\n   * Toggles the opened state of the drawer.\n   * @param isOpen Whether the drawer should open or close.\n   * @param restoreFocus Whether focus should be restored on close.\n   * @param openedVia Focus origin that can be optionally set when opening a drawer. The\n   *   origin will be used later when focus is restored on drawer close.\n   */\n  private _setOpen(isOpen: boolean, restoreFocus: boolean, openedVia: FocusOrigin = 'program')\n      : Promise<MatDrawerToggleResult> {\n    this._opened = isOpen;\n\n    if (isOpen) {\n      this._animationState = this._enableAnimations ? 'open' : 'open-instant';\n      this._openedVia = openedVia;\n    } else {\n      this._animationState = 'void';\n      if (restoreFocus) {\n        this._restoreFocus();\n      }\n    }\n\n    this._updateFocusTrapState();\n\n    return new Promise<MatDrawerToggleResult>(resolve => {\n      this.openedChange.pipe(take(1)).subscribe(open => resolve(open ? 'open' : 'close'));\n    });\n  }\n\n  _getWidth(): number {\n    return this._elementRef.nativeElement ? (this._elementRef.nativeElement.offsetWidth || 0) : 0;\n  }\n\n  /** Updates the enabled state of the focus trap. */\n  private _updateFocusTrapState() {\n    if (this._focusTrap) {\n      // The focus trap is only enabled when the drawer is open in any mode other than side.\n      this._focusTrap.enabled = this.opened && this.mode !== 'side';\n    }\n  }\n\n  // We have to use a `HostListener` here in order to support both Ivy and ViewEngine.\n  // In Ivy the `host` bindings will be merged when this class is extended, whereas in\n  // ViewEngine they're overwritten.\n  // TODO(crisbeto): we move this back into `host` once Ivy is turned on by default.\n  // tslint:disable-next-line:no-host-decorator-in-concrete\n  @HostListener('@transform.start', ['$event'])\n  _animationStartListener(event: AnimationEvent) {\n    this._animationStarted.next(event);\n  }\n\n  // We have to use a `HostListener` here in order to support both Ivy and ViewEngine.\n  // In Ivy the `host` bindings will be merged when this class is extended, whereas in\n  // ViewEngine they're overwritten.\n  // TODO(crisbeto): we move this back into `host` once Ivy is turned on by default.\n  // tslint:disable-next-line:no-host-decorator-in-concrete\n  @HostListener('@transform.done', ['$event'])\n  _animationDoneListener(event: AnimationEvent) {\n    this._animationEnd.next(event);\n  }\n\n  static ngAcceptInputType_disableClose: BooleanInput;\n  static ngAcceptInputType_autoFocus: BooleanInput;\n  static ngAcceptInputType_opened: BooleanInput;\n}\n\n\n/**\n * `<mat-drawer-container>` component.\n *\n * This is the parent component to one or two `<mat-drawer>`s that validates the state internally\n * and coordinates the backdrop and content styling.\n */\n@Component({\n  selector: 'mat-drawer-container',\n  exportAs: 'matDrawerContainer',\n  templateUrl: 'drawer-container.html',\n  styleUrls: ['drawer.css'],\n  host: {\n    'class': 'mat-drawer-container',\n    '[class.mat-drawer-container-explicit-backdrop]': '_backdropOverride',\n  },\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  encapsulation: ViewEncapsulation.None,\n  providers: [{\n    provide: MAT_DRAWER_CONTAINER,\n    useExisting: MatDrawerContainer\n  }]\n})\nexport class MatDrawerContainer implements AfterContentInit, DoCheck, OnDestroy {\n  /** All drawers in the container. Includes drawers from inside nested containers. */\n  @ContentChildren(MatDrawer, {\n    // We need to use `descendants: true`, because Ivy will no longer match\n    // indirect descendants if it's left as false.\n    descendants: true\n  })\n  _allDrawers: QueryList<MatDrawer>;\n\n  /** Drawers that belong to this container. */\n  _drawers = new QueryList<MatDrawer>();\n\n  @ContentChild(MatDrawerContent) _content: MatDrawerContent;\n  @ViewChild(MatDrawerContent) _userContent: MatDrawerContent;\n\n  /** The drawer child with the `start` position. */\n  get start(): MatDrawer | null { return this._start; }\n\n  /** The drawer child with the `end` position. */\n  get end(): MatDrawer | null { return this._end; }\n\n  /**\n   * Whether to automatically resize the container whenever\n   * the size of any of its drawers changes.\n   *\n   * **Use at your own risk!** Enabling this option can cause layout thrashing by measuring\n   * the drawers on every change detection cycle. Can be configured globally via the\n   * `MAT_DRAWER_DEFAULT_AUTOSIZE` token.\n   */\n  @Input()\n  get autosize(): boolean { return this._autosize; }\n  set autosize(value: boolean) { this._autosize = coerceBooleanProperty(value); }\n  private _autosize: boolean;\n\n  /**\n   * Whether the drawer container should have a backdrop while one of the sidenavs is open.\n   * If explicitly set to `true`, the backdrop will be enabled for drawers in the `side`\n   * mode as well.\n   */\n  @Input()\n  get hasBackdrop() {\n    if (this._backdropOverride == null) {\n      return !this._start || this._start.mode !== 'side' || !this._end || this._end.mode !== 'side';\n    }\n\n    return this._backdropOverride;\n  }\n  set hasBackdrop(value: any) {\n    this._backdropOverride = value == null ? null : coerceBooleanProperty(value);\n  }\n  _backdropOverride: boolean | null;\n\n  /** Event emitted when the drawer backdrop is clicked. */\n  @Output() readonly backdropClick: EventEmitter<void> = new EventEmitter<void>();\n\n  /** The drawer at the start/end position, independent of direction. */\n  private _start: MatDrawer | null;\n  private _end: MatDrawer | null;\n\n  /**\n   * The drawer at the left/right. When direction changes, these will change as well.\n   * They're used as aliases for the above to set the left/right style properly.\n   * In LTR, _left == _start and _right == _end.\n   * In RTL, _left == _end and _right == _start.\n   */\n  private _left: MatDrawer | null;\n  private _right: MatDrawer | null;\n\n  /** Emits when the component is destroyed. */\n  private readonly _destroyed = new Subject<void>();\n\n  /** Emits on every ngDoCheck. Used for debouncing reflows. */\n  private readonly _doCheckSubject = new Subject<void>();\n\n  /**\n   * Margins to be applied to the content. These are used to push / shrink the drawer content when a\n   * drawer is open. We use margin rather than transform even for push mode because transform breaks\n   * fixed position elements inside of the transformed element.\n   */\n  _contentMargins: {left: number|null, right: number|null} = {left: null, right: null};\n\n  readonly _contentMarginChanges = new Subject<{left: number|null, right: number|null}>();\n\n  /** Reference to the CdkScrollable instance that wraps the scrollable content. */\n  get scrollable(): CdkScrollable {\n    return this._userContent || this._content;\n  }\n\n  constructor(@Optional() private _dir: Directionality,\n              private _element: ElementRef<HTMLElement>,\n              private _ngZone: NgZone,\n              private _changeDetectorRef: ChangeDetectorRef,\n              viewportRuler: ViewportRuler,\n              @Inject(MAT_DRAWER_DEFAULT_AUTOSIZE) defaultAutosize = false,\n              @Optional() @Inject(ANIMATION_MODULE_TYPE) private _animationMode?: string) {\n\n    // If a `Dir` directive exists up the tree, listen direction changes\n    // and update the left/right properties to point to the proper start/end.\n    if (_dir) {\n      _dir.change.pipe(takeUntil(this._destroyed)).subscribe(() => {\n        this._validateDrawers();\n        this.updateContentMargins();\n      });\n    }\n\n    // Since the minimum width of the sidenav depends on the viewport width,\n    // we need to recompute the margins if the viewport changes.\n    viewportRuler.change()\n      .pipe(takeUntil(this._destroyed))\n      .subscribe(() => this.updateContentMargins());\n\n    this._autosize = defaultAutosize;\n  }\n\n  ngAfterContentInit() {\n    this._allDrawers.changes\n      .pipe(startWith(this._allDrawers), takeUntil(this._destroyed))\n      .subscribe((drawer: QueryList<MatDrawer>) => {\n        this._drawers.reset(drawer.filter(item => !item._container || item._container === this));\n        this._drawers.notifyOnChanges();\n      });\n\n    this._drawers.changes.pipe(startWith(null)).subscribe(() => {\n      this._validateDrawers();\n\n      this._drawers.forEach((drawer: MatDrawer) => {\n        this._watchDrawerToggle(drawer);\n        this._watchDrawerPosition(drawer);\n        this._watchDrawerMode(drawer);\n      });\n\n      if (!this._drawers.length ||\n          this._isDrawerOpen(this._start) ||\n          this._isDrawerOpen(this._end)) {\n        this.updateContentMargins();\n      }\n\n      this._changeDetectorRef.markForCheck();\n    });\n\n    // Avoid hitting the NgZone through the debounce timeout.\n    this._ngZone.runOutsideAngular(() => {\n      this._doCheckSubject.pipe(\n        debounceTime(10), // Arbitrary debounce time, less than a frame at 60fps\n        takeUntil(this._destroyed)\n      ).subscribe(() => this.updateContentMargins());\n    });\n  }\n\n  ngOnDestroy() {\n    this._contentMarginChanges.complete();\n    this._doCheckSubject.complete();\n    this._drawers.destroy();\n    this._destroyed.next();\n    this._destroyed.complete();\n  }\n\n  /** Calls `open` of both start and end drawers */\n  open(): void {\n    this._drawers.forEach(drawer => drawer.open());\n  }\n\n  /** Calls `close` of both start and end drawers */\n  close(): void {\n    this._drawers.forEach(drawer => drawer.close());\n  }\n\n  /**\n   * Recalculates and updates the inline styles for the content. Note that this should be used\n   * sparingly, because it causes a reflow.\n   */\n  updateContentMargins() {\n    // 1. For drawers in `over` mode, they don't affect the content.\n    // 2. For drawers in `side` mode they should shrink the content. We do this by adding to the\n    //    left margin (for left drawer) or right margin (for right the drawer).\n    // 3. For drawers in `push` mode the should shift the content without resizing it. We do this by\n    //    adding to the left or right margin and simultaneously subtracting the same amount of\n    //    margin from the other side.\n    let left = 0;\n    let right = 0;\n\n    if (this._left && this._left.opened) {\n      if (this._left.mode == 'side') {\n        left += this._left._getWidth();\n      } else if (this._left.mode == 'push') {\n        const width = this._left._getWidth();\n        left += width;\n        right -= width;\n      }\n    }\n\n    if (this._right && this._right.opened) {\n      if (this._right.mode == 'side') {\n        right += this._right._getWidth();\n      } else if (this._right.mode == 'push') {\n        const width = this._right._getWidth();\n        right += width;\n        left -= width;\n      }\n    }\n\n    // If either `right` or `left` is zero, don't set a style to the element. This\n    // allows users to specify a custom size via CSS class in SSR scenarios where the\n    // measured widths will always be zero. Note that we reset to `null` here, rather\n    // than below, in order to ensure that the types in the `if` below are consistent.\n    left = left || null!;\n    right = right || null!;\n\n    if (left !== this._contentMargins.left || right !== this._contentMargins.right) {\n      this._contentMargins = {left, right};\n\n      // Pull back into the NgZone since in some cases we could be outside. We need to be careful\n      // to do it only when something changed, otherwise we can end up hitting the zone too often.\n      this._ngZone.run(() => this._contentMarginChanges.next(this._contentMargins));\n    }\n  }\n\n  ngDoCheck() {\n    // If users opted into autosizing, do a check every change detection cycle.\n    if (this._autosize && this._isPushed()) {\n      // Run outside the NgZone, otherwise the debouncer will throw us into an infinite loop.\n      this._ngZone.runOutsideAngular(() => this._doCheckSubject.next());\n    }\n  }\n\n  /**\n   * Subscribes to drawer events in order to set a class on the main container element when the\n   * drawer is open and the backdrop is visible. This ensures any overflow on the container element\n   * is properly hidden.\n   */\n  private _watchDrawerToggle(drawer: MatDrawer): void {\n    drawer._animationStarted.pipe(\n      filter((event: AnimationEvent) => event.fromState !== event.toState),\n      takeUntil(this._drawers.changes),\n    )\n    .subscribe((event: AnimationEvent) => {\n      // Set the transition class on the container so that the animations occur. This should not\n      // be set initially because animations should only be triggered via a change in state.\n      if (event.toState !== 'open-instant' && this._animationMode !== 'NoopAnimations') {\n        this._element.nativeElement.classList.add('mat-drawer-transition');\n      }\n\n      this.updateContentMargins();\n      this._changeDetectorRef.markForCheck();\n    });\n\n    if (drawer.mode !== 'side') {\n      drawer.openedChange.pipe(takeUntil(this._drawers.changes)).subscribe(() =>\n          this._setContainerClass(drawer.opened));\n    }\n  }\n\n  /**\n   * Subscribes to drawer onPositionChanged event in order to\n   * re-validate drawers when the position changes.\n   */\n  private _watchDrawerPosition(drawer: MatDrawer): void {\n    if (!drawer) {\n      return;\n    }\n    // NOTE: We need to wait for the microtask queue to be empty before validating,\n    // since both drawers may be swapping positions at the same time.\n    drawer.onPositionChanged.pipe(takeUntil(this._drawers.changes)).subscribe(() => {\n      this._ngZone.onMicrotaskEmpty.pipe(take(1)).subscribe(() => {\n        this._validateDrawers();\n      });\n    });\n  }\n\n  /** Subscribes to changes in drawer mode so we can run change detection. */\n  private _watchDrawerMode(drawer: MatDrawer): void {\n    if (drawer) {\n      drawer._modeChanged.pipe(takeUntil(merge(this._drawers.changes, this._destroyed)))\n        .subscribe(() => {\n          this.updateContentMargins();\n          this._changeDetectorRef.markForCheck();\n        });\n    }\n  }\n\n  /** Toggles the 'mat-drawer-opened' class on the main 'mat-drawer-container' element. */\n  private _setContainerClass(isAdd: boolean): void {\n    const classList = this._element.nativeElement.classList;\n    const className = 'mat-drawer-container-has-open';\n\n    if (isAdd) {\n      classList.add(className);\n    } else {\n      classList.remove(className);\n    }\n  }\n\n  /** Validate the state of the drawer children components. */\n  private _validateDrawers() {\n    this._start = this._end = null;\n\n    // Ensure that we have at most one start and one end drawer.\n    this._drawers.forEach(drawer => {\n      if (drawer.position == 'end') {\n        if (this._end != null && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n          throwMatDuplicatedDrawerError('end');\n        }\n        this._end = drawer;\n      } else {\n        if (this._start != null && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n          throwMatDuplicatedDrawerError('start');\n        }\n        this._start = drawer;\n      }\n    });\n\n    this._right = this._left = null;\n\n    // Detect if we're LTR or RTL.\n    if (this._dir && this._dir.value === 'rtl') {\n      this._left = this._end;\n      this._right = this._start;\n    } else {\n      this._left = this._start;\n      this._right = this._end;\n    }\n  }\n\n  /** Whether the container is being pushed to the side by one of the drawers. */\n  private _isPushed() {\n    return (this._isDrawerOpen(this._start) && this._start.mode != 'over') ||\n           (this._isDrawerOpen(this._end) && this._end.mode != 'over');\n  }\n\n  _onBackdropClicked() {\n    this.backdropClick.emit();\n    this._closeModalDrawersViaBackdrop();\n  }\n\n  _closeModalDrawersViaBackdrop() {\n    // Close all open drawers where closing is not disabled and the mode is not `side`.\n    [this._start, this._end]\n      .filter(drawer => drawer && !drawer.disableClose && this._canHaveBackdrop(drawer))\n      .forEach(drawer => drawer!._closeViaBackdropClick());\n  }\n\n  _isShowingBackdrop(): boolean {\n    return (this._isDrawerOpen(this._start) && this._canHaveBackdrop(this._start)) ||\n           (this._isDrawerOpen(this._end) && this._canHaveBackdrop(this._end));\n  }\n\n  private _canHaveBackdrop(drawer: MatDrawer): boolean {\n    return drawer.mode !== 'side' || !!this._backdropOverride;\n  }\n\n  private _isDrawerOpen(drawer: MatDrawer | null): drawer is MatDrawer {\n    return drawer != null && drawer.opened;\n  }\n\n  static ngAcceptInputType_autosize: BooleanInput;\n  static ngAcceptInputType_hasBackdrop: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ContentChild,\n  ContentChildren,\n  forwardRef,\n  Inject,\n  Input,\n  ViewEncapsulation,\n  QueryList,\n  ElementRef,\n  NgZone,\n} from '@angular/core';\nimport {MatDrawer, MatDrawerContainer, MatDrawerContent, MAT_DRAWER_CONTAINER} from './drawer';\nimport {matDrawerAnimations} from './drawer-animations';\nimport {\n  BooleanInput,\n  coerceBooleanProperty,\n  coerceNumberProperty,\n  NumberInput\n} from '@angular/cdk/coercion';\nimport {ScrollDispatcher} from '@angular/cdk/scrolling';\n\n\n@Component({\n  selector: 'mat-sidenav-content',\n  template: '<ng-content></ng-content>',\n  host: {\n    'class': 'mat-drawer-content mat-sidenav-content',\n    '[style.margin-left.px]': '_container._contentMargins.left',\n    '[style.margin-right.px]': '_container._contentMargins.right',\n  },\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  encapsulation: ViewEncapsulation.None,\n})\nexport class MatSidenavContent extends MatDrawerContent {\n  constructor(\n      changeDetectorRef: ChangeDetectorRef,\n      @Inject(forwardRef(() => MatSidenavContainer)) container: MatSidenavContainer,\n      elementRef: ElementRef<HTMLElement>,\n      scrollDispatcher: ScrollDispatcher,\n      ngZone: NgZone) {\n    super(changeDetectorRef, container, elementRef, scrollDispatcher, ngZone);\n  }\n}\n\n\n@Component({\n  selector: 'mat-sidenav',\n  exportAs: 'matSidenav',\n  templateUrl: 'drawer.html',\n  animations: [matDrawerAnimations.transformDrawer],\n  host: {\n    'class': 'mat-drawer mat-sidenav',\n    'tabIndex': '-1',\n    // must prevent the browser from aligning text based on value\n    '[attr.align]': 'null',\n    '[class.mat-drawer-end]': 'position === \"end\"',\n    '[class.mat-drawer-over]': 'mode === \"over\"',\n    '[class.mat-drawer-push]': 'mode === \"push\"',\n    '[class.mat-drawer-side]': 'mode === \"side\"',\n    '[class.mat-drawer-opened]': 'opened',\n    '[class.mat-sidenav-fixed]': 'fixedInViewport',\n    '[style.top.px]': 'fixedInViewport ? fixedTopGap : null',\n    '[style.bottom.px]': 'fixedInViewport ? fixedBottomGap : null',\n  },\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  encapsulation: ViewEncapsulation.None,\n})\nexport class MatSidenav extends MatDrawer {\n  /** Whether the sidenav is fixed in the viewport. */\n  @Input()\n  get fixedInViewport(): boolean { return this._fixedInViewport; }\n  set fixedInViewport(value) { this._fixedInViewport = coerceBooleanProperty(value); }\n  private _fixedInViewport = false;\n\n  /**\n   * The gap between the top of the sidenav and the top of the viewport when the sidenav is in fixed\n   * mode.\n   */\n  @Input()\n  get fixedTopGap(): number { return this._fixedTopGap; }\n  set fixedTopGap(value) { this._fixedTopGap = coerceNumberProperty(value); }\n  private _fixedTopGap = 0;\n\n  /**\n   * The gap between the bottom of the sidenav and the bottom of the viewport when the sidenav is in\n   * fixed mode.\n   */\n  @Input()\n  get fixedBottomGap(): number { return this._fixedBottomGap; }\n  set fixedBottomGap(value) { this._fixedBottomGap = coerceNumberProperty(value); }\n  private _fixedBottomGap = 0;\n\n  static ngAcceptInputType_fixedInViewport: BooleanInput;\n  static ngAcceptInputType_fixedTopGap: NumberInput;\n  static ngAcceptInputType_fixedBottomGap: NumberInput;\n}\n\n\n@Component({\n  selector: 'mat-sidenav-container',\n  exportAs: 'matSidenavContainer',\n  templateUrl: 'sidenav-container.html',\n  styleUrls: ['drawer.css'],\n  host: {\n    'class': 'mat-drawer-container mat-sidenav-container',\n    '[class.mat-drawer-container-explicit-backdrop]': '_backdropOverride',\n  },\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  encapsulation: ViewEncapsulation.None,\n  providers: [{\n    provide: MAT_DRAWER_CONTAINER,\n    useExisting: MatSidenavContainer\n  }]\n\n})\nexport class MatSidenavContainer extends MatDrawerContainer {\n  @ContentChildren(MatSidenav, {\n    // We need to use `descendants: true`, because Ivy will no longer match\n    // indirect descendants if it's left as false.\n    descendants: true\n  })\n  _allDrawers: QueryList<MatSidenav>;\n\n  @ContentChild(MatSidenavContent) _content: MatSidenavContent;\n  static ngAcceptInputType_hasBackdrop: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {PlatformModule} from '@angular/cdk/platform';\nimport {CdkScrollableModule} from '@angular/cdk/scrolling';\nimport {CommonModule} from '@angular/common';\nimport {NgModule} from '@angular/core';\nimport {MatCommonModule} from '@angular/material/core';\nimport {MatDrawer, MatDrawerContainer, MatDrawerContent} from './drawer';\nimport {MatSidenav, MatSidenavContainer, MatSidenavContent} from './sidenav';\n\n\n@NgModule({\n  imports: [\n    CommonModule,\n    MatCommonModule,\n    PlatformModule,\n    CdkScrollableModule,\n  ],\n  exports: [\n    CdkScrollableModule,\n    MatCommonModule,\n    MatDrawer,\n    MatDrawerContainer,\n    MatDrawerContent,\n    MatSidenav,\n    MatSidenavContainer,\n    MatSidenavContent,\n  ],\n  declarations: [\n    MatDrawer,\n    MatDrawerContainer,\n    MatDrawerContent,\n    MatSidenav,\n    MatSidenavContainer,\n    MatSidenavContent,\n  ],\n})\nexport class MatSidenavModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './sidenav-module';\nexport {\n  throwMatDuplicatedDrawerError,\n  MatDrawerToggleResult,\n  MAT_DRAWER_DEFAULT_AUTOSIZE,\n  MAT_DRAWER_DEFAULT_AUTOSIZE_FACTORY,\n  MatDrawerContent,\n  MatDrawer,\n  MatDrawerContainer,\n  MatDrawerMode,\n} from './drawer';\nexport * from './sidenav';\nexport * from './drawer-animations';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n\nexport {MAT_DRAWER_CONTAINER as ɵangular_material_src_material_sidenav_sidenav_a} from './drawer';","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.fromEvent = rxjs_1.fromEvent;\n//# sourceMappingURL=fromEvent.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Catches errors on the observable to be handled by returning a new observable or throwing an error.\n *\n * <img src=\"./img/catch.png\" width=\"100%\">\n *\n * @example <caption>Continues with a different Observable when there's an error</caption>\n *\n * Observable.of(1, 2, 3, 4, 5)\n *   .map(n => {\n * \t   if (n == 4) {\n * \t     throw 'four!';\n *     }\n *\t   return n;\n *   })\n *   .catch(err => Observable.of('I', 'II', 'III', 'IV', 'V'))\n *   .subscribe(x => console.log(x));\n *   // 1, 2, 3, I, II, III, IV, V\n *\n * @example <caption>Retries the caught source Observable again in case of error, similar to retry() operator</caption>\n *\n * Observable.of(1, 2, 3, 4, 5)\n *   .map(n => {\n * \t   if (n === 4) {\n * \t     throw 'four!';\n *     }\n * \t   return n;\n *   })\n *   .catch((err, caught) => caught)\n *   .take(30)\n *   .subscribe(x => console.log(x));\n *   // 1, 2, 3, 1, 2, 3, ...\n *\n * @example <caption>Throws a new error when the source Observable throws an error</caption>\n *\n * Observable.of(1, 2, 3, 4, 5)\n *   .map(n => {\n *     if (n == 4) {\n *       throw 'four!';\n *     }\n *     return n;\n *   })\n *   .catch(err => {\n *     throw 'error in source. Details: ' + err;\n *   })\n *   .subscribe(\n *     x => console.log(x),\n *     err => console.log(err)\n *   );\n *   // 1, 2, 3, error in source. Details: four!\n *\n * @param {function} selector a function that takes as arguments `err`, which is the error, and `caught`, which\n *  is the source observable, in case you'd like to \"retry\" that observable by returning it again. Whatever observable\n *  is returned by the `selector` will be used to continue the observable chain.\n * @return {Observable} An observable that originates from either the source or the observable returned by the\n *  catch `selector` function.\n * @method catch\n * @name catch\n * @owner Observable\n */\nfunction _catch(selector) {\n    return operators_1.catchError(selector)(this);\n}\nexports._catch = _catch;\n//# sourceMappingURL=catch.js.map","export function isObject(x) {\n    return x !== null && typeof x === 'object';\n}\n//# sourceMappingURL=isObject.js.map","import { map } from './map';\nimport { from } from '../observable/from';\nimport { SimpleOuterSubscriber, SimpleInnerSubscriber, innerSubscribe } from '../innerSubscribe';\nexport function exhaustMap(project, resultSelector) {\n    if (resultSelector) {\n        return (source) => source.pipe(exhaustMap((a, i) => from(project(a, i)).pipe(map((b, ii) => resultSelector(a, b, i, ii)))));\n    }\n    return (source) => source.lift(new ExhaustMapOperator(project));\n}\nclass ExhaustMapOperator {\n    constructor(project) {\n        this.project = project;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new ExhaustMapSubscriber(subscriber, this.project));\n    }\n}\nclass ExhaustMapSubscriber extends SimpleOuterSubscriber {\n    constructor(destination, project) {\n        super(destination);\n        this.project = project;\n        this.hasSubscription = false;\n        this.hasCompleted = false;\n        this.index = 0;\n    }\n    _next(value) {\n        if (!this.hasSubscription) {\n            this.tryNext(value);\n        }\n    }\n    tryNext(value) {\n        let result;\n        const index = this.index++;\n        try {\n            result = this.project(value, index);\n        }\n        catch (err) {\n            this.destination.error(err);\n            return;\n        }\n        this.hasSubscription = true;\n        this._innerSub(result);\n    }\n    _innerSub(result) {\n        const innerSubscriber = new SimpleInnerSubscriber(this);\n        const destination = this.destination;\n        destination.add(innerSubscriber);\n        const innerSubscription = innerSubscribe(result, innerSubscriber);\n        if (innerSubscription !== innerSubscriber) {\n            destination.add(innerSubscription);\n        }\n    }\n    _complete() {\n        this.hasCompleted = true;\n        if (!this.hasSubscription) {\n            this.destination.complete();\n        }\n        this.unsubscribe();\n    }\n    notifyNext(innerValue) {\n        this.destination.next(innerValue);\n    }\n    notifyError(err) {\n        this.destination.error(err);\n    }\n    notifyComplete() {\n        this.hasSubscription = false;\n        if (this.hasCompleted) {\n            this.destination.complete();\n        }\n    }\n}\n//# sourceMappingURL=exhaustMap.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar finally_1 = require(\"../../operator/finally\");\nrxjs_1.Observable.prototype.finally = finally_1._finally;\nrxjs_1.Observable.prototype._finally = finally_1._finally;\n//# sourceMappingURL=finally.js.map","export class Scheduler {\n    constructor(SchedulerAction, now = Scheduler.now) {\n        this.SchedulerAction = SchedulerAction;\n        this.now = now;\n    }\n    schedule(work, delay = 0, state) {\n        return new this.SchedulerAction(this, work).schedule(state, delay);\n    }\n}\nScheduler.now = () => Date.now();\n//# sourceMappingURL=Scheduler.js.map","var unsupportedIterableToArray = require(\"./unsupportedIterableToArray\");\n\nfunction _createForOfIteratorHelper(o, allowArrayLike) {\n  var it;\n\n  if (typeof Symbol === \"undefined\" || o[Symbol.iterator] == null) {\n    if (Array.isArray(o) || (it = unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === \"number\") {\n      if (it) o = it;\n      var i = 0;\n\n      var F = function F() {};\n\n      return {\n        s: F,\n        n: function n() {\n          if (i >= o.length) return {\n            done: true\n          };\n          return {\n            done: false,\n            value: o[i++]\n          };\n        },\n        e: function e(_e) {\n          throw _e;\n        },\n        f: F\n      };\n    }\n\n    throw new TypeError(\"Invalid attempt to iterate non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");\n  }\n\n  var normalCompletion = true,\n      didErr = false,\n      err;\n  return {\n    s: function s() {\n      it = o[Symbol.iterator]();\n    },\n    n: function n() {\n      var step = it.next();\n      normalCompletion = step.done;\n      return step;\n    },\n    e: function e(_e2) {\n      didErr = true;\n      err = _e2;\n    },\n    f: function f() {\n      try {\n        if (!normalCompletion && it[\"return\"] != null) it[\"return\"]();\n      } finally {\n        if (didErr) throw err;\n      }\n    }\n  };\n}\n\nmodule.exports = _createForOfIteratorHelper;","const TimeoutErrorImpl = (() => {\n    function TimeoutErrorImpl() {\n        Error.call(this);\n        this.message = 'Timeout has occurred';\n        this.name = 'TimeoutError';\n        return this;\n    }\n    TimeoutErrorImpl.prototype = Object.create(Error.prototype);\n    return TimeoutErrorImpl;\n})();\nexport const TimeoutError = TimeoutErrorImpl;\n//# sourceMappingURL=TimeoutError.js.map","import { switchMap } from './switchMap';\nimport { identity } from '../util/identity';\nexport function switchAll() {\n    return switchMap(identity);\n}\n//# sourceMappingURL=switchAll.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Splits the source Observable into two, one with values that satisfy a\n * predicate, and another with values that don't satisfy the predicate.\n *\n * <span class=\"informal\">It's like {@link filter}, but returns two Observables:\n * one like the output of {@link filter}, and the other with values that did not\n * pass the condition.</span>\n *\n * <img src=\"./img/partition.png\" width=\"100%\">\n *\n * `partition` outputs an array with two Observables that partition the values\n * from the source Observable through the given `predicate` function. The first\n * Observable in that array emits source values for which the predicate argument\n * returns true. The second Observable emits source values for which the\n * predicate returns false. The first behaves like {@link filter} and the second\n * behaves like {@link filter} with the predicate negated.\n *\n * @example <caption>Partition click events into those on DIV elements and those elsewhere</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var parts = clicks.partition(ev => ev.target.tagName === 'DIV');\n * var clicksOnDivs = parts[0];\n * var clicksElsewhere = parts[1];\n * clicksOnDivs.subscribe(x => console.log('DIV clicked: ', x));\n * clicksElsewhere.subscribe(x => console.log('Other clicked: ', x));\n *\n * @see {@link filter}\n *\n * @param {function(value: T, index: number): boolean} predicate A function that\n * evaluates each value emitted by the source Observable. If it returns `true`,\n * the value is emitted on the first Observable in the returned array, if\n * `false` the value is emitted on the second Observable in the array. The\n * `index` parameter is the number `i` for the i-th source emission that has\n * happened since the subscription, starting from the number `0`.\n * @param {any} [thisArg] An optional argument to determine the value of `this`\n * in the `predicate` function.\n * @return {[Observable<T>, Observable<T>]} An array with two Observables: one\n * with values that passed the predicate, and another with values that did not\n * pass the predicate.\n * @method partition\n * @owner Observable\n */\nfunction partition(predicate, thisArg) {\n    return operators_1.partition(predicate, thisArg)(this);\n}\nexports.partition = partition;\n//# sourceMappingURL=partition.js.map","import { isArray } from './isArray';\nexport function isNumeric(val) {\n    return !isArray(val) && (val - parseFloat(val) + 1) >= 0;\n}\n//# sourceMappingURL=isNumeric.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar bufferWhen_1 = require(\"../../operator/bufferWhen\");\nrxjs_1.Observable.prototype.bufferWhen = bufferWhen_1.bufferWhen;\n//# sourceMappingURL=bufferWhen.js.map","import arrayLikeToArray from \"./arrayLikeToArray\";\nexport default function _arrayWithoutHoles(arr) {\n  if (Array.isArray(arr)) return arrayLikeToArray(arr);\n}","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar CsvConfigConsts = (function () {\n    function CsvConfigConsts() {\n    }\n    CsvConfigConsts.EOL = \"\\r\\n\";\n    CsvConfigConsts.BOM = \"\\ufeff\";\n    CsvConfigConsts.DEFAULT_FIELD_SEPARATOR = ',';\n    CsvConfigConsts.DEFAULT_DECIMAL_SEPARATOR = '.';\n    CsvConfigConsts.DEFAULT_QUOTE = '\"';\n    CsvConfigConsts.DEFAULT_SHOW_TITLE = false;\n    CsvConfigConsts.DEFAULT_TITLE = 'My Report';\n    CsvConfigConsts.DEFAULT_FILENAME = 'mycsv.csv';\n    CsvConfigConsts.DEFAULT_SHOW_LABELS = false;\n    CsvConfigConsts.DEFAULT_USE_BOM = true;\n    CsvConfigConsts.DEFAULT_HEADER = [];\n    CsvConfigConsts.DEFAULT_NO_DOWNLOAD = false;\n    CsvConfigConsts.DEFAULT_NULL_TO_EMPTY_STRING = false;\n    return CsvConfigConsts;\n}());\nexports.CsvConfigConsts = CsvConfigConsts;\nexports.ConfigDefaults = {\n    filename: CsvConfigConsts.DEFAULT_FILENAME,\n    fieldSeparator: CsvConfigConsts.DEFAULT_FIELD_SEPARATOR,\n    quoteStrings: CsvConfigConsts.DEFAULT_QUOTE,\n    decimalseparator: CsvConfigConsts.DEFAULT_DECIMAL_SEPARATOR,\n    showLabels: CsvConfigConsts.DEFAULT_SHOW_LABELS,\n    showTitle: CsvConfigConsts.DEFAULT_SHOW_TITLE,\n    title: CsvConfigConsts.DEFAULT_TITLE,\n    useBom: CsvConfigConsts.DEFAULT_USE_BOM,\n    headers: CsvConfigConsts.DEFAULT_HEADER,\n    noDownload: CsvConfigConsts.DEFAULT_NO_DOWNLOAD,\n    nullToEmptyString: CsvConfigConsts.DEFAULT_NULL_TO_EMPTY_STRING\n};\nvar Angular5Csv = (function () {\n    function Angular5Csv(DataJSON, filename, options) {\n        this.csv = \"\";\n        var config = options || {};\n        this.data = typeof DataJSON != 'object' ? JSON.parse(DataJSON) : DataJSON;\n        this._options = objectAssign({}, exports.ConfigDefaults, config);\n        if (this._options.filename) {\n            this._options.filename = filename;\n        }\n        this.generateCsv();\n    }\n    /**\n     * Generate and Download Csv\n     */\n    Angular5Csv.prototype.generateCsv = function () {\n        if (this._options.useBom) {\n            this.csv += CsvConfigConsts.BOM;\n        }\n        if (this._options.showTitle) {\n            this.csv += this._options.title + '\\r\\n\\n';\n        }\n        this.getHeaders();\n        this.getBody();\n        if (this.csv == '') {\n            console.log(\"Invalid data\");\n            return;\n        }\n        if (this._options.noDownload) {\n            return this.csv;\n        }\n        var blob = new Blob([this.csv], { \"type\": \"text/csv;charset=utf8;\" });\n        if (navigator.msSaveBlob) {\n            var filename = this._options.filename.replace(/ /g, \"_\") + \".csv\";\n            navigator.msSaveBlob(blob, filename);\n        }\n        else {\n            var uri = 'data:attachment/csv;charset=utf-8,' + encodeURI(this.csv);\n            var link = document.createElement(\"a\");\n            link.href = URL.createObjectURL(blob);\n            link.setAttribute('visibility', 'hidden');\n            link.download = this._options.filename.replace(/ /g, \"_\") + \".csv\";\n            document.body.appendChild(link);\n            link.click();\n            document.body.removeChild(link);\n        }\n    };\n    /**\n     * Create Headers\n     */\n    Angular5Csv.prototype.getHeaders = function () {\n        var _this = this;\n        if (this._options.headers.length > 0) {\n            var headers = this._options.headers;\n            var row = headers.reduce(function (headerRow, header) {\n                return headerRow + header + _this._options.fieldSeparator;\n            }, '');\n            row = row.slice(0, -1);\n            this.csv += row + CsvConfigConsts.EOL;\n        }\n    };\n    /**\n     * Create Body\n     */\n    Angular5Csv.prototype.getBody = function () {\n        for (var i = 0; i < this.data.length; i++) {\n            var row = \"\";\n            for (var index in this.data[i]) {\n                row += this.formatData(this.data[i][index]) + this._options.fieldSeparator;\n            }\n            row = row.slice(0, -1);\n            this.csv += row + CsvConfigConsts.EOL;\n        }\n    };\n    /**\n     * Format Data\n     * @param {any} data\n     */\n    Angular5Csv.prototype.formatData = function (data) {\n        if (this._options.decimalseparator === 'locale' && Angular5Csv.isFloat(data)) {\n            return data.toLocaleString();\n        }\n        if (this._options.decimalseparator !== '.' && Angular5Csv.isFloat(data)) {\n            return data.toString().replace('.', this._options.decimalseparator);\n        }\n        if (typeof data === 'string') {\n            data = data.replace(/\"/g, '\"\"');\n            if (this._options.quoteStrings || data.indexOf(',') > -1 || data.indexOf('\\n') > -1 || data.indexOf('\\r') > -1) {\n                data = this._options.quoteStrings + data + this._options.quoteStrings;\n            }\n            return data;\n        }\n        if (this._options.nullToEmptyString) {\n            if (data === null) {\n                return data = '';\n            }\n            return data;\n        }\n        if (typeof data === 'boolean') {\n            return data ? 'TRUE' : 'FALSE';\n        }\n        return data;\n    };\n    /**\n     * Check if is Float\n     * @param {any} input\n     */\n    Angular5Csv.isFloat = function (input) {\n        return +input === input && (!isFinite(input) || Boolean(input % 1));\n    };\n    return Angular5Csv;\n}());\nexports.Angular5Csv = Angular5Csv;\nvar hasOwnProperty = Object.prototype.hasOwnProperty;\nvar propIsEnumerable = Object.prototype.propertyIsEnumerable;\n/**\n * Convet to Object\n * @param {any} val\n */\nfunction toObject(val) {\n    if (val === null || val === undefined) {\n        throw new TypeError('Object.assign cannot be called with null or undefined');\n    }\n    return Object(val);\n}\n/**\n * Assign data  to new Object\n * @param {any}   target\n * @param {any[]} ...source\n */\nfunction objectAssign(target) {\n    var source = [];\n    for (var _i = 1; _i < arguments.length; _i++) {\n        source[_i - 1] = arguments[_i];\n    }\n    var from;\n    var to = toObject(target);\n    var symbols;\n    for (var s = 1; s < arguments.length; s++) {\n        from = Object(arguments[s]);\n        for (var key in from) {\n            if (hasOwnProperty.call(from, key)) {\n                to[key] = from[key];\n            }\n        }\n        if (Object.getOwnPropertySymbols) {\n            symbols = Object.getOwnPropertySymbols(from);\n            for (var i = 0; i < symbols.length; i++) {\n                if (propIsEnumerable.call(from, symbols[i])) {\n                    to[symbols[i]] = from[symbols[i]];\n                }\n            }\n        }\n    }\n    return to;\n}\n//# sourceMappingURL=Angular5-csv.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Branch out the source Observable values as a nested Observable using a\n * factory function of closing Observables to determine when to start a new\n * window.\n *\n * <span class=\"informal\">It's like {@link bufferWhen}, but emits a nested\n * Observable instead of an array.</span>\n *\n * <img src=\"./img/windowWhen.png\" width=\"100%\">\n *\n * Returns an Observable that emits windows of items it collects from the source\n * Observable. The output Observable emits connected, non-overlapping windows.\n * It emits the current window and opens a new one whenever the Observable\n * produced by the specified `closingSelector` function emits an item. The first\n * window is opened immediately when subscribing to the output Observable.\n *\n * @example <caption>Emit only the first two clicks events in every window of [1-5] random seconds</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks\n *   .windowWhen(() => Rx.Observable.interval(1000 + Math.random() * 4000))\n *   .map(win => win.take(2)) // each window has at most 2 emissions\n *   .mergeAll(); // flatten the Observable-of-Observables\n * result.subscribe(x => console.log(x));\n *\n * @see {@link window}\n * @see {@link windowCount}\n * @see {@link windowTime}\n * @see {@link windowToggle}\n * @see {@link bufferWhen}\n *\n * @param {function(): Observable} closingSelector A function that takes no\n * arguments and returns an Observable that signals (on either `next` or\n * `complete`) when to close the previous window and start a new one.\n * @return {Observable<Observable<T>>} An observable of windows, which in turn\n * are Observables.\n * @method windowWhen\n * @owner Observable\n */\nfunction windowWhen(closingSelector) {\n    return operators_1.windowWhen(closingSelector)(this);\n}\nexports.windowWhen = windowWhen;\n//# sourceMappingURL=windowWhen.js.map","import { Subscription } from './Subscription';\nexport class SubjectSubscription extends Subscription {\n    constructor(subject, subscriber) {\n        super();\n        this.subject = subject;\n        this.subscriber = subscriber;\n        this.closed = false;\n    }\n    unsubscribe() {\n        if (this.closed) {\n            return;\n        }\n        this.closed = true;\n        const subject = this.subject;\n        const observers = subject.observers;\n        this.subject = null;\n        if (!observers || observers.length === 0 || subject.isStopped || subject.closed) {\n            return;\n        }\n        const subscriberIndex = observers.indexOf(this.subscriber);\n        if (subscriberIndex !== -1) {\n            observers.splice(subscriberIndex, 1);\n        }\n    }\n}\n//# sourceMappingURL=SubjectSubscription.js.map","import { AsyncAction } from './AsyncAction';\nexport class QueueAction extends AsyncAction {\n    constructor(scheduler, work) {\n        super(scheduler, work);\n        this.scheduler = scheduler;\n        this.work = work;\n    }\n    schedule(state, delay = 0) {\n        if (delay > 0) {\n            return super.schedule(state, delay);\n        }\n        this.delay = delay;\n        this.state = state;\n        this.scheduler.flush(this);\n        return this;\n    }\n    execute(state, delay) {\n        return (delay > 0 || this.closed) ?\n            super.execute(state, delay) :\n            this._execute(state, delay);\n    }\n    requestAsyncId(scheduler, id, delay = 0) {\n        if ((delay !== null && delay > 0) || (delay === null && this.delay > 0)) {\n            return super.requestAsyncId(scheduler, id, delay);\n        }\n        return scheduler.flush(this);\n    }\n}\n//# sourceMappingURL=QueueAction.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar first_1 = require(\"../../operator/first\");\nrxjs_1.Observable.prototype.first = first_1.first;\n//# sourceMappingURL=first.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/* tslint:enable:max-line-length */\n/**\n * Allows source Observable to be subscribed only once with a Subject of choice,\n * while still sharing its values between multiple subscribers.\n *\n * <span class=\"informal\">Subscribe to Observable once, but send its values to multiple subscribers.</span>\n *\n * <img src=\"./img/multicast.png\" width=\"100%\">\n *\n * `multicast` is an operator that works in two modes.\n *\n * In the first mode you provide a single argument to it, which can be either an initialized Subject or a Subject\n * factory. As a result you will get a special kind of an Observable - a {@link ConnectableObservable}. It can be\n * subscribed multiple times, just as regular Observable, but it won't subscribe to the source Observable at that\n * moment. It will do it only if you call its `connect` method. This means you can essentially control by hand, when\n * source Observable will be actually subscribed. What is more, ConnectableObservable will share this one subscription\n * between all of its subscribers. This means that, for example, `ajax` Observable will only send a request once,\n * even though usually it would send a request per every subscriber. Since it sends a request at the moment of\n * subscription, here request would be sent when the `connect` method of a ConnectableObservable is called.\n *\n * The most common pattern of using ConnectableObservable is calling `connect` when the first consumer subscribes,\n * keeping the subscription alive while several consumers come and go and finally unsubscribing from the source\n * Observable, when the last consumer unsubscribes. To not implement that logic over and over again,\n * ConnectableObservable has a special operator, `refCount`. When called, it returns an Observable, which will count\n * the number of consumers subscribed to it and keep ConnectableObservable connected as long as there is at least\n * one consumer. So if you don't actually need to decide yourself when to connect and disconnect a\n * ConnectableObservable, use `refCount`.\n *\n * The second mode is invoked by calling `multicast` with an additional, second argument - selector function.\n * This function accepts an Observable - which basically mirrors the source Observable - and returns Observable\n * as well, which should be the input stream modified by any operators you want. Note that in this\n * mode you cannot provide initialized Subject as a first argument - it has to be a Subject factory. If\n * you provide selector function, `multicast` returns just a regular Observable, instead of ConnectableObservable.\n * Thus, as usual, each subscription to this stream triggers subscription to the source Observable. However,\n * if inside the selector function you subscribe to the input Observable multiple times, actual source stream\n * will be subscribed only once. So if you have a chain of operators that use some Observable many times,\n * but you want to subscribe to that Observable only once, this is the mode you would use.\n *\n * Subject provided as a first parameter of `multicast` is used as a proxy for the single subscription to the\n * source Observable. It means that all values from the source stream go through that Subject. Thus, if a Subject\n * has some special properties, Observable returned by `multicast` will have them as well. If you want to use\n * `multicast` with a Subject that is one of the ones included in RxJS by default - {@link Subject},\n * {@link AsyncSubject}, {@link BehaviorSubject}, or {@link ReplaySubject} - simply use {@link publish},\n * {@link publishLast}, {@link publishBehavior} or {@link publishReplay} respectively. These are actually\n * just wrappers around `multicast`, with a specific Subject hardcoded inside.\n *\n * Also, if you use {@link publish} or {@link publishReplay} with a ConnectableObservables `refCount` operator,\n * you can simply use {@link share} and {@link shareReplay} respectively, which chain these two.\n *\n * @example <caption>Use ConnectableObservable</caption>\n * const seconds = Rx.Observable.interval(1000);\n * const connectableSeconds = seconds.multicast(new Subject());\n *\n * connectableSeconds.subscribe(value => console.log('first: ' + value));\n * connectableSeconds.subscribe(value => console.log('second: ' + value));\n *\n * // At this point still nothing happens, even though we subscribed twice.\n *\n * connectableSeconds.connect();\n *\n * // From now on `seconds` are being logged to the console,\n * // twice per every second. `seconds` Observable was however only subscribed once,\n * // so under the hood Observable.interval had only one clock started.\n *\n * @example <caption>Use selector</caption>\n * const seconds = Rx.Observable.interval(1000);\n *\n * seconds\n *     .multicast(\n *         () => new Subject(),\n *         seconds => seconds.zip(seconds) // Usually zip would subscribe to `seconds` twice.\n *                                         // Because we are inside selector, `seconds` is subscribed once,\n *     )                                   // thus starting only one clock used internally by Observable.interval.\n *     .subscribe();\n *\n * @see {@link publish}\n * @see {@link publishLast}\n * @see {@link publishBehavior}\n * @see {@link publishReplay}\n * @see {@link share}\n * @see {@link shareReplay}\n *\n * @param {Function|Subject} subjectOrSubjectFactory - Factory function to create an intermediate Subject through\n * which the source sequence's elements will be multicast to the selector function input Observable or\n * ConnectableObservable returned by the operator.\n * @param {Function} [selector] - Optional selector function that can use the input stream\n * as many times as needed, without causing multiple subscriptions to the source stream.\n * Subscribers to the input source will receive all notifications of the source from the\n * time of the subscription forward.\n * @return {Observable<T>|ConnectableObservable<T>} An Observable that emits the results of invoking the selector\n * on the source stream or a special {@link ConnectableObservable}, if selector was not provided.\n *\n * @method multicast\n * @owner Observable\n */\nfunction multicast(subjectOrSubjectFactory, selector) {\n    return operators_1.multicast(subjectOrSubjectFactory, selector)(this);\n}\nexports.multicast = multicast;\n//# sourceMappingURL=multicast.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Emits only the first `count` values emitted by the source Observable.\n *\n * <span class=\"informal\">Takes the first `count` values from the source, then\n * completes.</span>\n *\n * <img src=\"./img/take.png\" width=\"100%\">\n *\n * `take` returns an Observable that emits only the first `count` values emitted\n * by the source Observable. If the source emits fewer than `count` values then\n * all of its values are emitted. After that, it completes, regardless if the\n * source completes.\n *\n * @example <caption>Take the first 5 seconds of an infinite 1-second interval Observable</caption>\n * var interval = Rx.Observable.interval(1000);\n * var five = interval.take(5);\n * five.subscribe(x => console.log(x));\n *\n * @see {@link takeLast}\n * @see {@link takeUntil}\n * @see {@link takeWhile}\n * @see {@link skip}\n *\n * @throws {ArgumentOutOfRangeError} When using `take(i)`, it delivers an\n * ArgumentOutOrRangeError to the Observer's `error` callback if `i < 0`.\n *\n * @param {number} count The maximum number of `next` values to emit.\n * @return {Observable<T>} An Observable that emits only the first `count`\n * values emitted by the source Observable, or all of the values from the source\n * if the source emits fewer than `count` values.\n * @method take\n * @owner Observable\n */\nfunction take(count) {\n    return operators_1.take(count)(this);\n}\nexports.take = take;\n//# sourceMappingURL=take.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Applies a given `project` function to each value emitted by the source\n * Observable, and emits the resulting values as an Observable.\n *\n * <span class=\"informal\">Like [Array.prototype.map()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map),\n * it passes each source value through a transformation function to get\n * corresponding output values.</span>\n *\n * <img src=\"./img/map.png\" width=\"100%\">\n *\n * Similar to the well known `Array.prototype.map` function, this operator\n * applies a projection to each value and emits that projection in the output\n * Observable.\n *\n * @example <caption>Map every click to the clientX position of that click</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var positions = clicks.map(ev => ev.clientX);\n * positions.subscribe(x => console.log(x));\n *\n * @see {@link mapTo}\n * @see {@link pluck}\n *\n * @param {function(value: T, index: number): R} project The function to apply\n * to each `value` emitted by the source Observable. The `index` parameter is\n * the number `i` for the i-th emission that has happened since the\n * subscription, starting from the number `0`.\n * @param {any} [thisArg] An optional argument to define what `this` is in the\n * `project` function.\n * @return {Observable<R>} An Observable that emits the values from the source\n * Observable transformed by the given `project` function.\n * @method map\n * @owner Observable\n */\nfunction map(project, thisArg) {\n    return operators_1.map(project, thisArg)(this);\n}\nexports.map = map;\n//# sourceMappingURL=map.js.map","import { InnerSubscriber } from '../InnerSubscriber';\nimport { subscribeTo } from './subscribeTo';\nimport { Observable } from '../Observable';\nexport function subscribeToResult(outerSubscriber, result, outerValue, outerIndex, innerSubscriber = new InnerSubscriber(outerSubscriber, outerValue, outerIndex)) {\n    if (innerSubscriber.closed) {\n        return undefined;\n    }\n    if (result instanceof Observable) {\n        return result.subscribe(innerSubscriber);\n    }\n    return subscribeTo(result)(innerSubscriber);\n}\n//# sourceMappingURL=subscribeToResult.js.map","var arrayLikeToArray = require(\"./arrayLikeToArray\");\n\nfunction _unsupportedIterableToArray(o, minLen) {\n  if (!o) return;\n  if (typeof o === \"string\") return arrayLikeToArray(o, minLen);\n  var n = Object.prototype.toString.call(o).slice(8, -1);\n  if (n === \"Object\" && o.constructor) n = o.constructor.name;\n  if (n === \"Map\" || n === \"Set\") return Array.from(o);\n  if (n === \"Arguments\" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return arrayLikeToArray(o, minLen);\n}\n\nmodule.exports = _unsupportedIterableToArray;","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar bufferToggle_1 = require(\"../../operator/bufferToggle\");\nrxjs_1.Observable.prototype.bufferToggle = bufferToggle_1.bufferToggle;\n//# sourceMappingURL=bufferToggle.js.map","import { Subscriber } from '../Subscriber';\nexport function pairwise() {\n    return (source) => source.lift(new PairwiseOperator());\n}\nclass PairwiseOperator {\n    call(subscriber, source) {\n        return source.subscribe(new PairwiseSubscriber(subscriber));\n    }\n}\nclass PairwiseSubscriber extends Subscriber {\n    constructor(destination) {\n        super(destination);\n        this.hasPrev = false;\n    }\n    _next(value) {\n        let pair;\n        if (this.hasPrev) {\n            pair = [this.prev, value];\n        }\n        else {\n            this.hasPrev = true;\n        }\n        this.prev = value;\n        if (pair) {\n            this.destination.next(pair);\n        }\n    }\n}\n//# sourceMappingURL=pairwise.js.map","import { Subscriber } from '../Subscriber';\nexport function sequenceEqual(compareTo, comparator) {\n    return (source) => source.lift(new SequenceEqualOperator(compareTo, comparator));\n}\nexport class SequenceEqualOperator {\n    constructor(compareTo, comparator) {\n        this.compareTo = compareTo;\n        this.comparator = comparator;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new SequenceEqualSubscriber(subscriber, this.compareTo, this.comparator));\n    }\n}\nexport class SequenceEqualSubscriber extends Subscriber {\n    constructor(destination, compareTo, comparator) {\n        super(destination);\n        this.compareTo = compareTo;\n        this.comparator = comparator;\n        this._a = [];\n        this._b = [];\n        this._oneComplete = false;\n        this.destination.add(compareTo.subscribe(new SequenceEqualCompareToSubscriber(destination, this)));\n    }\n    _next(value) {\n        if (this._oneComplete && this._b.length === 0) {\n            this.emit(false);\n        }\n        else {\n            this._a.push(value);\n            this.checkValues();\n        }\n    }\n    _complete() {\n        if (this._oneComplete) {\n            this.emit(this._a.length === 0 && this._b.length === 0);\n        }\n        else {\n            this._oneComplete = true;\n        }\n        this.unsubscribe();\n    }\n    checkValues() {\n        const { _a, _b, comparator } = this;\n        while (_a.length > 0 && _b.length > 0) {\n            let a = _a.shift();\n            let b = _b.shift();\n            let areEqual = false;\n            try {\n                areEqual = comparator ? comparator(a, b) : a === b;\n            }\n            catch (e) {\n                this.destination.error(e);\n            }\n            if (!areEqual) {\n                this.emit(false);\n            }\n        }\n    }\n    emit(value) {\n        const { destination } = this;\n        destination.next(value);\n        destination.complete();\n    }\n    nextB(value) {\n        if (this._oneComplete && this._a.length === 0) {\n            this.emit(false);\n        }\n        else {\n            this._b.push(value);\n            this.checkValues();\n        }\n    }\n    completeB() {\n        if (this._oneComplete) {\n            this.emit(this._a.length === 0 && this._b.length === 0);\n        }\n        else {\n            this._oneComplete = true;\n        }\n    }\n}\nclass SequenceEqualCompareToSubscriber extends Subscriber {\n    constructor(destination, parent) {\n        super(destination);\n        this.parent = parent;\n    }\n    _next(value) {\n        this.parent.nextB(value);\n    }\n    _error(err) {\n        this.parent.error(err);\n        this.unsubscribe();\n    }\n    _complete() {\n        this.parent.completeB();\n        this.unsubscribe();\n    }\n}\n//# sourceMappingURL=sequenceEqual.js.map","var _typeof = require(\"../helpers/typeof\");\n\nvar assertThisInitialized = require(\"./assertThisInitialized\");\n\nfunction _possibleConstructorReturn(self, call) {\n  if (call && (_typeof(call) === \"object\" || typeof call === \"function\")) {\n    return call;\n  }\n\n  return assertThisInitialized(self);\n}\n\nmodule.exports = _possibleConstructorReturn;","export default function _arrayLikeToArray(arr, len) {\n  if (len == null || len > arr.length) len = arr.length;\n\n  for (var i = 0, arr2 = new Array(len); i < len; i++) {\n    arr2[i] = arr[i];\n  }\n\n  return arr2;\n}","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {CompileReflector, ExternalReference, getUrlScheme, Identifiers, syntaxError} from '@angular/compiler';\nimport {ANALYZE_FOR_ENTRY_COMPONENTS, ChangeDetectionStrategy, ChangeDetectorRef, Component, ComponentFactory, ComponentFactoryResolver, ComponentRef, ElementRef, Injector, LOCALE_ID, NgModuleFactory, NgModuleRef, QueryList, Renderer2, SecurityContext, TemplateRef, TRANSLATIONS_FORMAT, ViewContainerRef, ViewEncapsulation, ɵand, ɵccf, ɵcmf, ɵCodegenComponentFactoryResolver, ɵcrt, ɵdid, ɵeld, ɵEMPTY_ARRAY, ɵEMPTY_MAP, ɵinlineInterpolate, ɵinterpolate, ɵmod, ɵmpd, ɵncd, ɵnov, ɵpad, ɵpid, ɵpod, ɵppd, ɵprd, ɵqud, ɵReflectionCapabilities as ReflectionCapabilities, ɵregisterModuleFactory, ɵstringify as stringify, ɵted, ɵunv, ɵvid} from '@angular/core';\n\nexport const MODULE_SUFFIX = '';\nconst builtinExternalReferences = createBuiltinExternalReferencesMap();\n\nexport class JitReflector implements CompileReflector {\n  private reflectionCapabilities = new ReflectionCapabilities();\n\n  componentModuleUrl(type: any, cmpMetadata: Component): string {\n    const moduleId = cmpMetadata.moduleId;\n\n    if (typeof moduleId === 'string') {\n      const scheme = getUrlScheme(moduleId);\n      return scheme ? moduleId : `package:${moduleId}${MODULE_SUFFIX}`;\n    } else if (moduleId !== null && moduleId !== void 0) {\n      throw syntaxError(\n          `moduleId should be a string in \"${\n              stringify(type)}\". See https://goo.gl/wIDDiL for more information.\\n` +\n          `If you're using Webpack you should inline the template and the styles, see https://goo.gl/X2J8zc.`);\n    }\n\n    return `./${stringify(type)}`;\n  }\n  parameters(typeOrFunc: /*Type*/ any): any[][] {\n    return this.reflectionCapabilities.parameters(typeOrFunc);\n  }\n  tryAnnotations(typeOrFunc: /*Type*/ any): any[] {\n    return this.annotations(typeOrFunc);\n  }\n  annotations(typeOrFunc: /*Type*/ any): any[] {\n    return this.reflectionCapabilities.annotations(typeOrFunc);\n  }\n  shallowAnnotations(typeOrFunc: /*Type*/ any): any[] {\n    throw new Error('Not supported in JIT mode');\n  }\n  propMetadata(typeOrFunc: /*Type*/ any): {[key: string]: any[]} {\n    return this.reflectionCapabilities.propMetadata(typeOrFunc);\n  }\n  hasLifecycleHook(type: any, lcProperty: string): boolean {\n    return this.reflectionCapabilities.hasLifecycleHook(type, lcProperty);\n  }\n  guards(type: any): {[key: string]: any} {\n    return this.reflectionCapabilities.guards(type);\n  }\n  resolveExternalReference(ref: ExternalReference): any {\n    return builtinExternalReferences.get(ref) || ref.runtime;\n  }\n}\n\n\nfunction createBuiltinExternalReferencesMap() {\n  const map = new Map<ExternalReference, any>();\n  map.set(Identifiers.ANALYZE_FOR_ENTRY_COMPONENTS, ANALYZE_FOR_ENTRY_COMPONENTS);\n  map.set(Identifiers.ElementRef, ElementRef);\n  map.set(Identifiers.NgModuleRef, NgModuleRef);\n  map.set(Identifiers.ViewContainerRef, ViewContainerRef);\n  map.set(Identifiers.ChangeDetectorRef, ChangeDetectorRef);\n  map.set(Identifiers.Renderer2, Renderer2);\n  map.set(Identifiers.QueryList, QueryList);\n  map.set(Identifiers.TemplateRef, TemplateRef);\n  map.set(Identifiers.CodegenComponentFactoryResolver, ɵCodegenComponentFactoryResolver);\n  map.set(Identifiers.ComponentFactoryResolver, ComponentFactoryResolver);\n  map.set(Identifiers.ComponentFactory, ComponentFactory);\n  map.set(Identifiers.ComponentRef, ComponentRef);\n  map.set(Identifiers.NgModuleFactory, NgModuleFactory);\n  map.set(Identifiers.createModuleFactory, ɵcmf);\n  map.set(Identifiers.moduleDef, ɵmod);\n  map.set(Identifiers.moduleProviderDef, ɵmpd);\n  map.set(Identifiers.RegisterModuleFactoryFn, ɵregisterModuleFactory);\n  map.set(Identifiers.Injector, Injector);\n  map.set(Identifiers.ViewEncapsulation, ViewEncapsulation);\n  map.set(Identifiers.ChangeDetectionStrategy, ChangeDetectionStrategy);\n  map.set(Identifiers.SecurityContext, SecurityContext);\n  map.set(Identifiers.LOCALE_ID, LOCALE_ID);\n  map.set(Identifiers.TRANSLATIONS_FORMAT, TRANSLATIONS_FORMAT);\n  map.set(Identifiers.inlineInterpolate, ɵinlineInterpolate);\n  map.set(Identifiers.interpolate, ɵinterpolate);\n  map.set(Identifiers.EMPTY_ARRAY, ɵEMPTY_ARRAY);\n  map.set(Identifiers.EMPTY_MAP, ɵEMPTY_MAP);\n  map.set(Identifiers.viewDef, ɵvid);\n  map.set(Identifiers.elementDef, ɵeld);\n  map.set(Identifiers.anchorDef, ɵand);\n  map.set(Identifiers.textDef, ɵted);\n  map.set(Identifiers.directiveDef, ɵdid);\n  map.set(Identifiers.providerDef, ɵprd);\n  map.set(Identifiers.queryDef, ɵqud);\n  map.set(Identifiers.pureArrayDef, ɵpad);\n  map.set(Identifiers.pureObjectDef, ɵpod);\n  map.set(Identifiers.purePipeDef, ɵppd);\n  map.set(Identifiers.pipeDef, ɵpid);\n  map.set(Identifiers.nodeValue, ɵnov);\n  map.set(Identifiers.ngContentDef, ɵncd);\n  map.set(Identifiers.unwrapValue, ɵunv);\n  map.set(Identifiers.createRendererType2, ɵcrt);\n  map.set(Identifiers.createComponentFactory, ɵccf);\n  return map;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {CompileMetadataResolver, CompilerConfig, CompileReflector, DirectiveNormalizer, DirectiveResolver, DomElementSchemaRegistry, ElementSchemaRegistry, HtmlParser, I18NHtmlParser, JitCompiler, JitEvaluator, JitSummaryResolver, Lexer, NgModuleCompiler, NgModuleResolver, Parser, PipeResolver, ProviderMeta, ResourceLoader, StaticSymbolCache, StyleCompiler, SummaryResolver, TemplateParser, UrlResolver, ViewCompiler} from '@angular/compiler';\nimport {Compiler, CompilerFactory, CompilerOptions, ComponentFactory, Inject, InjectionToken, Injector, isDevMode, MissingTranslationStrategy, ModuleWithComponentFactories, NgModuleFactory, Optional, PACKAGE_ROOT_URL, StaticProvider, TRANSLATIONS, TRANSLATIONS_FORMAT, Type, ViewEncapsulation, ɵConsole as Console} from '@angular/core';\n\nimport {JitReflector} from './compiler_reflector';\n\nexport const ERROR_COLLECTOR_TOKEN = new InjectionToken('ErrorCollector');\n\n/**\n * A default provider for {@link PACKAGE_ROOT_URL} that maps to '/'.\n */\nexport const DEFAULT_PACKAGE_URL_PROVIDER = {\n  provide: PACKAGE_ROOT_URL,\n  useValue: '/'\n};\n\nconst _NO_RESOURCE_LOADER: ResourceLoader = {\n  get(url: string): Promise<string> {\n    throw new Error(\n        `No ResourceLoader implementation has been provided. Can't read the url \"${url}\"`);\n  }\n};\n\nconst baseHtmlParser = new InjectionToken('HtmlParser');\n\nexport class CompilerImpl implements Compiler {\n  private _delegate: JitCompiler;\n  public readonly injector: Injector;\n  constructor(\n      injector: Injector, private _metadataResolver: CompileMetadataResolver,\n      templateParser: TemplateParser, styleCompiler: StyleCompiler, viewCompiler: ViewCompiler,\n      ngModuleCompiler: NgModuleCompiler, summaryResolver: SummaryResolver<Type<any>>,\n      compileReflector: CompileReflector, jitEvaluator: JitEvaluator,\n      compilerConfig: CompilerConfig, console: Console) {\n    this._delegate = new JitCompiler(\n        _metadataResolver, templateParser, styleCompiler, viewCompiler, ngModuleCompiler,\n        summaryResolver, compileReflector, jitEvaluator, compilerConfig, console,\n        this.getExtraNgModuleProviders.bind(this));\n    this.injector = injector;\n  }\n\n  private getExtraNgModuleProviders() {\n    return [this._metadataResolver.getProviderMetadata(\n        new ProviderMeta(Compiler, {useValue: this}))];\n  }\n\n  compileModuleSync<T>(moduleType: Type<T>): NgModuleFactory<T> {\n    return this._delegate.compileModuleSync(moduleType) as NgModuleFactory<T>;\n  }\n  compileModuleAsync<T>(moduleType: Type<T>): Promise<NgModuleFactory<T>> {\n    return this._delegate.compileModuleAsync(moduleType) as Promise<NgModuleFactory<T>>;\n  }\n  compileModuleAndAllComponentsSync<T>(moduleType: Type<T>): ModuleWithComponentFactories<T> {\n    const result = this._delegate.compileModuleAndAllComponentsSync(moduleType);\n    return {\n      ngModuleFactory: result.ngModuleFactory as NgModuleFactory<T>,\n      componentFactories: result.componentFactories as ComponentFactory<any>[],\n    };\n  }\n  compileModuleAndAllComponentsAsync<T>(moduleType: Type<T>):\n      Promise<ModuleWithComponentFactories<T>> {\n    return this._delegate.compileModuleAndAllComponentsAsync(moduleType)\n        .then((result) => ({\n                ngModuleFactory: result.ngModuleFactory as NgModuleFactory<T>,\n                componentFactories: result.componentFactories as ComponentFactory<any>[],\n              }));\n  }\n  loadAotSummaries(summaries: () => any[]) {\n    this._delegate.loadAotSummaries(summaries);\n  }\n  hasAotSummary(ref: Type<any>): boolean {\n    return this._delegate.hasAotSummary(ref);\n  }\n  getComponentFactory<T>(component: Type<T>): ComponentFactory<T> {\n    return this._delegate.getComponentFactory(component) as ComponentFactory<T>;\n  }\n  clearCache(): void {\n    this._delegate.clearCache();\n  }\n  clearCacheFor(type: Type<any>) {\n    this._delegate.clearCacheFor(type);\n  }\n  getModuleId(moduleType: Type<any>): string|undefined {\n    const meta = this._metadataResolver.getNgModuleMetadata(moduleType);\n    return meta && meta.id || undefined;\n  }\n}\n/**\n * A set of providers that provide `JitCompiler` and its dependencies to use for\n * template compilation.\n */\nconst COMPILER_PROVIDERS__PRE_R3__ = <StaticProvider[]>[\n  {provide: CompileReflector, useValue: new JitReflector()},\n  {provide: ResourceLoader, useValue: _NO_RESOURCE_LOADER},\n  {provide: JitSummaryResolver, deps: []},\n  {provide: SummaryResolver, useExisting: JitSummaryResolver},\n  {provide: Console, deps: []},\n  {provide: Lexer, deps: []},\n  {provide: Parser, deps: [Lexer]},\n  {\n    provide: baseHtmlParser,\n    useClass: HtmlParser,\n    deps: [],\n  },\n  {\n    provide: I18NHtmlParser,\n    useFactory:\n        (parser: HtmlParser, translations: string|null, format: string, config: CompilerConfig,\n         console: Console) => {\n          translations = translations || '';\n          const missingTranslation =\n              translations ? config.missingTranslation! : MissingTranslationStrategy.Ignore;\n          return new I18NHtmlParser(parser, translations, format, missingTranslation, console);\n        },\n    deps: [\n      baseHtmlParser,\n      [new Optional(), new Inject(TRANSLATIONS)],\n      [new Optional(), new Inject(TRANSLATIONS_FORMAT)],\n      [CompilerConfig],\n      [Console],\n    ]\n  },\n  {\n    provide: HtmlParser,\n    useExisting: I18NHtmlParser,\n  },\n  {\n    provide: TemplateParser,\n    deps: [CompilerConfig, CompileReflector, Parser, ElementSchemaRegistry, I18NHtmlParser, Console]\n  },\n  {provide: JitEvaluator, useClass: JitEvaluator, deps: []},\n  {provide: DirectiveNormalizer, deps: [ResourceLoader, UrlResolver, HtmlParser, CompilerConfig]},\n  {\n    provide: CompileMetadataResolver,\n    deps: [\n      CompilerConfig, HtmlParser, NgModuleResolver, DirectiveResolver, PipeResolver,\n      SummaryResolver, ElementSchemaRegistry, DirectiveNormalizer, Console,\n      [Optional, StaticSymbolCache], CompileReflector, [Optional, ERROR_COLLECTOR_TOKEN]\n    ]\n  },\n  DEFAULT_PACKAGE_URL_PROVIDER,\n  {provide: StyleCompiler, deps: [UrlResolver]},\n  {provide: ViewCompiler, deps: [CompileReflector]},\n  {provide: NgModuleCompiler, deps: [CompileReflector]},\n  {provide: CompilerConfig, useValue: new CompilerConfig()},\n  {\n    provide: Compiler,\n    useClass: CompilerImpl,\n    deps: [\n      Injector, CompileMetadataResolver, TemplateParser, StyleCompiler, ViewCompiler,\n      NgModuleCompiler, SummaryResolver, CompileReflector, JitEvaluator, CompilerConfig, Console\n    ]\n  },\n  {provide: DomElementSchemaRegistry, deps: []},\n  {provide: ElementSchemaRegistry, useExisting: DomElementSchemaRegistry},\n  {provide: UrlResolver, deps: [PACKAGE_ROOT_URL]},\n  {provide: DirectiveResolver, deps: [CompileReflector]},\n  {provide: PipeResolver, deps: [CompileReflector]},\n  {provide: NgModuleResolver, deps: [CompileReflector]},\n];\n\nexport const COMPILER_PROVIDERS__POST_R3__ =\n    <StaticProvider[]>[{provide: Compiler, useFactory: () => new Compiler()}];\nexport const COMPILER_PROVIDERS = COMPILER_PROVIDERS__PRE_R3__;\n/**\n * @publicApi\n */\nexport class JitCompilerFactory implements CompilerFactory {\n  private _defaultOptions: CompilerOptions[];\n\n  /* @internal */\n  constructor(defaultOptions: CompilerOptions[]) {\n    const compilerOptions: CompilerOptions = {\n      useJit: true,\n      defaultEncapsulation: ViewEncapsulation.Emulated,\n      missingTranslation: MissingTranslationStrategy.Warning,\n    };\n\n    this._defaultOptions = [compilerOptions, ...defaultOptions];\n  }\n  createCompiler(options: CompilerOptions[] = []): Compiler {\n    const opts = _mergeOptions(this._defaultOptions.concat(options));\n    const injector = Injector.create([\n      COMPILER_PROVIDERS, {\n        provide: CompilerConfig,\n        useFactory: () => {\n          return new CompilerConfig({\n            // let explicit values from the compiler options overwrite options\n            // from the app providers\n            useJit: opts.useJit,\n            jitDevMode: isDevMode(),\n            // let explicit values from the compiler options overwrite options\n            // from the app providers\n            defaultEncapsulation: opts.defaultEncapsulation,\n            missingTranslation: opts.missingTranslation,\n            preserveWhitespaces: opts.preserveWhitespaces,\n          });\n        },\n        deps: []\n      },\n      opts.providers!\n    ]);\n    return injector.get(Compiler);\n  }\n}\n\nfunction _mergeOptions(optionsArr: CompilerOptions[]): CompilerOptions {\n  return {\n    useJit: _lastDefined(optionsArr.map(options => options.useJit)),\n    defaultEncapsulation: _lastDefined(optionsArr.map(options => options.defaultEncapsulation)),\n    providers: _mergeArrays(optionsArr.map(options => options.providers!)),\n    missingTranslation: _lastDefined(optionsArr.map(options => options.missingTranslation)),\n    preserveWhitespaces: _lastDefined(optionsArr.map(options => options.preserveWhitespaces)),\n  };\n}\n\nfunction _lastDefined<T>(args: T[]): T|undefined {\n  for (let i = args.length - 1; i >= 0; i--) {\n    if (args[i] !== undefined) {\n      return args[i];\n    }\n  }\n  return undefined;\n}\n\nfunction _mergeArrays(parts: any[][]): any[] {\n  const result: any[] = [];\n  parts.forEach((part) => part && result.push(...part));\n  return result;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {COMPILER_OPTIONS, CompilerFactory, createPlatformFactory, platformCore, PlatformRef, StaticProvider} from '@angular/core';\n\nimport {JitCompilerFactory} from './compiler_factory';\n\n/**\n * A platform that included corePlatform and the compiler.\n *\n * @publicApi\n */\nexport const platformCoreDynamic = createPlatformFactory(platformCore, 'coreDynamic', [\n  {provide: COMPILER_OPTIONS, useValue: {}, multi: true},\n  {provide: CompilerFactory, useClass: JitCompilerFactory, deps: [COMPILER_OPTIONS]},\n]);\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {ResourceLoader} from '@angular/compiler';\nimport {Injectable} from '@angular/core';\n\n\n@Injectable()\nexport class ResourceLoaderImpl extends ResourceLoader {\n  get(url: string): Promise<string> {\n    let resolve: (result: any) => void;\n    let reject: (error: any) => void;\n    const promise = new Promise<string>((res, rej) => {\n      resolve = res;\n      reject = rej;\n    });\n    const xhr = new XMLHttpRequest();\n    xhr.open('GET', url, true);\n    xhr.responseType = 'text';\n\n    xhr.onload = function() {\n      // responseText is the old-school way of retrieving response (supported by IE8 & 9)\n      // response/responseType properties were introduced in ResourceLoader Level2 spec (supported\n      // by IE10)\n      const response = xhr.response || xhr.responseText;\n\n      // normalize IE9 bug (http://bugs.jquery.com/ticket/1450)\n      let status = xhr.status === 1223 ? 204 : xhr.status;\n\n      // fix status code when it is 0 (0 status is undocumented).\n      // Occurs when accessing file resources or on Android 4.1 stock browser\n      // while retrieving files from application cache.\n      if (status === 0) {\n        status = response ? 200 : 0;\n      }\n\n      if (200 <= status && status <= 300) {\n        resolve(response);\n      } else {\n        reject(`Failed to load ${url}`);\n      }\n    };\n\n    xhr.onerror = function() {\n      reject(`Failed to load ${url}`);\n    };\n\n    xhr.send();\n    return promise;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ɵPLATFORM_BROWSER_ID as PLATFORM_BROWSER_ID} from '@angular/common';\nimport {ResourceLoader} from '@angular/compiler';\nimport {COMPILER_OPTIONS, PLATFORM_ID, StaticProvider} from '@angular/core';\n\nimport {ɵINTERNAL_BROWSER_PLATFORM_PROVIDERS as INTERNAL_BROWSER_PLATFORM_PROVIDERS} from '@angular/platform-browser';\n\nimport {ResourceLoaderImpl} from './resource_loader/resource_loader_impl';\n\n/**\n * @publicApi\n */\nexport const INTERNAL_BROWSER_DYNAMIC_PLATFORM_PROVIDERS: StaticProvider[] = [\n  INTERNAL_BROWSER_PLATFORM_PROVIDERS,\n  {\n    provide: COMPILER_OPTIONS,\n    useValue: {providers: [{provide: ResourceLoader, useClass: ResourceLoaderImpl, deps: []}]},\n    multi: true\n  },\n  {provide: PLATFORM_ID, useValue: PLATFORM_BROWSER_ID},\n];\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ResourceLoader} from '@angular/compiler';\nimport {ɵglobal as global} from '@angular/core';\n\n/**\n * An implementation of ResourceLoader that uses a template cache to avoid doing an actual\n * ResourceLoader.\n *\n * The template cache needs to be built and loaded into window.$templateCache\n * via a separate mechanism.\n *\n * @publicApi\n */\nexport class CachedResourceLoader extends ResourceLoader {\n  private _cache: {[url: string]: string};\n\n  constructor() {\n    super();\n    this._cache = (<any>global).$templateCache;\n    if (this._cache == null) {\n      throw new Error('CachedResourceLoader: Template cache was not found in $templateCache.');\n    }\n  }\n\n  get(url: string): Promise<string> {\n    if (this._cache.hasOwnProperty(url)) {\n      return Promise.resolve(this._cache[url]);\n    } else {\n      return <Promise<any>>Promise.reject(\n          'CachedResourceLoader: Did not find cached template for ' + url);\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport {COMPILER_PROVIDERS__POST_R3__ as ɵCOMPILER_PROVIDERS__POST_R3__, CompilerImpl as ɵCompilerImpl} from './compiler_factory';\nexport {platformCoreDynamic as ɵplatformCoreDynamic} from './platform_core_dynamic';\nexport {INTERNAL_BROWSER_DYNAMIC_PLATFORM_PROVIDERS as ɵINTERNAL_BROWSER_DYNAMIC_PLATFORM_PROVIDERS} from './platform_providers';\nexport {ResourceLoaderImpl as ɵResourceLoaderImpl} from './resource_loader/resource_loader_impl';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @module\n * @description\n * Entry point for all public APIs of the common package.\n */\n\nimport {Version} from '@angular/core';\n\n/**\n * @publicApi\n */\nexport const VERSION = new Version('10.1.3');\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ResourceLoader} from '@angular/compiler';\nimport {CompilerFactory, createPlatformFactory, platformCore, PlatformRef, Provider, StaticProvider} from '@angular/core';\n\nimport {platformCoreDynamic} from './platform_core_dynamic';\nimport {INTERNAL_BROWSER_DYNAMIC_PLATFORM_PROVIDERS} from './platform_providers';\nimport {CachedResourceLoader} from './resource_loader/resource_loader_cache';\n\nexport * from './private_export';\nexport {VERSION} from './version';\nexport {JitCompilerFactory} from './compiler_factory';\n\n/**\n * @publicApi\n */\nexport const RESOURCE_CACHE_PROVIDER: Provider[] =\n    [{provide: ResourceLoader, useClass: CachedResourceLoader, deps: []}];\n\n/**\n * @publicApi\n */\nexport const platformBrowserDynamic = createPlatformFactory(\n    platformCoreDynamic, 'browserDynamic', INTERNAL_BROWSER_DYNAMIC_PLATFORM_PROVIDERS);\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @module\n * @description\n * Entry point for all public APIs of this package.\n */\nexport * from './src/platform-browser-dynamic';\n\n// This file only reexports content of the `src` folder. Keep it that way.\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n// This file is not used to build this module. It is only used during editing\n// by the TypeScript language service and during build for verification. `ngc`\n// replaces this file with production index.ts when it rewrites private symbol\n// names.\n\nexport * from './public_api';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './index';\n\nexport {CachedResourceLoader as ɵangular_packages_platform_browser_dynamic_platform_browser_dynamic_a} from './src/resource_loader/resource_loader_cache';","import { hostReportError } from './hostReportError';\nexport const subscribeToPromise = (promise) => (subscriber) => {\n    promise.then((value) => {\n        if (!subscriber.closed) {\n            subscriber.next(value);\n            subscriber.complete();\n        }\n    }, (err) => subscriber.error(err))\n        .then(null, hostReportError);\n    return subscriber;\n};\n//# sourceMappingURL=subscribeToPromise.js.map","import { switchMap } from './switchMap';\nexport function switchMapTo(innerObservable, resultSelector) {\n    return resultSelector ? switchMap(() => innerObservable, resultSelector) : switchMap(() => innerObservable);\n}\n//# sourceMappingURL=switchMapTo.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar publish_1 = require(\"../../operator/publish\");\nrxjs_1.Observable.prototype.publish = publish_1.publish;\n//# sourceMappingURL=publish.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar operators_1 = require(\"rxjs/operators\");\n/**\n *\n * Errors if Observable does not emit a value in given time span.\n *\n * <span class=\"informal\">Timeouts on Observable that doesn't emit values fast enough.</span>\n *\n * <img src=\"./img/timeout.png\" width=\"100%\">\n *\n * `timeout` operator accepts as an argument either a number or a Date.\n *\n * If number was provided, it returns an Observable that behaves like a source\n * Observable, unless there is a period of time where there is no value emitted.\n * So if you provide `100` as argument and first value comes after 50ms from\n * the moment of subscription, this value will be simply re-emitted by the resulting\n * Observable. If however after that 100ms passes without a second value being emitted,\n * stream will end with an error and source Observable will be unsubscribed.\n * These checks are performed throughout whole lifecycle of Observable - from the moment\n * it was subscribed to, until it completes or errors itself. Thus every value must be\n * emitted within specified period since previous value.\n *\n * If provided argument was Date, returned Observable behaves differently. It throws\n * if Observable did not complete before provided Date. This means that periods between\n * emission of particular values do not matter in this case. If Observable did not complete\n * before provided Date, source Observable will be unsubscribed. Other than that, resulting\n * stream behaves just as source Observable.\n *\n * `timeout` accepts also a Scheduler as a second parameter. It is used to schedule moment (or moments)\n * when returned Observable will check if source stream emitted value or completed.\n *\n * @example <caption>Check if ticks are emitted within certain timespan</caption>\n * const seconds = Rx.Observable.interval(1000);\n *\n * seconds.timeout(1100) // Let's use bigger timespan to be safe,\n *                       // since `interval` might fire a bit later then scheduled.\n * .subscribe(\n *     value => console.log(value), // Will emit numbers just as regular `interval` would.\n *     err => console.log(err) // Will never be called.\n * );\n *\n * seconds.timeout(900).subscribe(\n *     value => console.log(value), // Will never be called.\n *     err => console.log(err) // Will emit error before even first value is emitted,\n *                             // since it did not arrive within 900ms period.\n * );\n *\n * @example <caption>Use Date to check if Observable completed</caption>\n * const seconds = Rx.Observable.interval(1000);\n *\n * seconds.timeout(new Date(\"December 17, 2020 03:24:00\"))\n * .subscribe(\n *     value => console.log(value), // Will emit values as regular `interval` would\n *                                  // until December 17, 2020 at 03:24:00.\n *     err => console.log(err) // On December 17, 2020 at 03:24:00 it will emit an error,\n *                             // since Observable did not complete by then.\n * );\n *\n * @see {@link timeoutWith}\n *\n * @param {number|Date} due Number specifying period within which Observable must emit values\n *                          or Date specifying before when Observable should complete\n * @param {Scheduler} [scheduler] Scheduler controlling when timeout checks occur.\n * @return {Observable<T>} Observable that mirrors behaviour of source, unless timeout checks fail.\n * @method timeout\n * @owner Observable\n */\nfunction timeout(due, scheduler) {\n    if (scheduler === void 0) { scheduler = rxjs_1.asyncScheduler; }\n    return operators_1.timeout(due, scheduler)(this);\n}\nexports.timeout = timeout;\n//# sourceMappingURL=timeout.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/* tslint:enable:max-line-length */\n/**\n * Returns an Observable that emits only the last item emitted by the source Observable.\n * It optionally takes a predicate function as a parameter, in which case, rather than emitting\n * the last item from the source Observable, the resulting Observable will emit the last item\n * from the source Observable that satisfies the predicate.\n *\n * <img src=\"./img/last.png\" width=\"100%\">\n *\n * @throws {EmptyError} Delivers an EmptyError to the Observer's `error`\n * callback if the Observable completes before any `next` notification was sent.\n * @param {function} [predicate] - The condition any source emitted item has to satisfy.\n * @param {any} [defaultValue] - The default value to use if the predicate isn't\n * satisfied, or no values were emitted (if no predicate).\n * @return {Observable} An Observable that emits only the last item satisfying the given condition\n * from the source, or an NoSuchElementException if no such items are emitted.\n * @throws - Throws if no items that match the predicate are emitted by the source Observable.\n * @method last\n * @owner Observable\n */\nfunction last() {\n    var args = [];\n    for (var _i = 0; _i < arguments.length; _i++) {\n        args[_i] = arguments[_i];\n    }\n    return operators_1.last.apply(void 0, args)(this);\n}\nexports.last = last;\n//# sourceMappingURL=last.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Returns an Observable that skips items emitted by the source Observable until a second Observable emits an item.\n *\n * <img src=\"./img/skipUntil.png\" width=\"100%\">\n *\n * @param {Observable} notifier - The second Observable that has to emit an item before the source Observable's elements begin to\n * be mirrored by the resulting Observable.\n * @return {Observable<T>} An Observable that skips items from the source Observable until the second Observable emits\n * an item, then emits the remaining items.\n * @method skipUntil\n * @owner Observable\n */\nfunction skipUntil(notifier) {\n    return operators_1.skipUntil(notifier)(this);\n}\nexports.skipUntil = skipUntil;\n//# sourceMappingURL=skipUntil.js.map","function _isNativeReflectConstruct() {\n  if (typeof Reflect === \"undefined\" || !Reflect.construct) return false;\n  if (Reflect.construct.sham) return false;\n  if (typeof Proxy === \"function\") return true;\n\n  try {\n    Date.prototype.toString.call(Reflect.construct(Date, [], function () {}));\n    return true;\n  } catch (e) {\n    return false;\n  }\n}\n\nmodule.exports = _isNativeReflectConstruct;","import { mergeMap } from './mergeMap';\nimport { identity } from '../util/identity';\nexport function mergeAll(concurrent = Number.POSITIVE_INFINITY) {\n    return mergeMap(identity, concurrent);\n}\n//# sourceMappingURL=mergeAll.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar windowToggle_1 = require(\"../../operator/windowToggle\");\nrxjs_1.Observable.prototype.windowToggle = windowToggle_1.windowToggle;\n//# sourceMappingURL=windowToggle.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * @param scheduler\n * @return {Observable<TimeInterval<any>>|WebSocketSubject<T>|Observable<T>}\n * @method timeInterval\n * @owner Observable\n */\nfunction timeInterval(scheduler) {\n    if (scheduler === void 0) { scheduler = rxjs_1.asyncScheduler; }\n    return operators_1.timeInterval(scheduler)(this);\n}\nexports.timeInterval = timeInterval;\n//# sourceMappingURL=timeInterval.js.map","import { mergeMap } from './mergeMap';\nexport function concatMap(project, resultSelector) {\n    return mergeMap(project, resultSelector, 1);\n}\n//# sourceMappingURL=concatMap.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {InjectionToken} from '@angular/core';\nimport {ThemePalette} from '@angular/material/core';\n\n/** Default `mat-checkbox` options that can be overridden. */\nexport interface MatCheckboxDefaultOptions {\n  color?: ThemePalette;\n  clickAction?: MatCheckboxClickAction;\n}\n\n/** Injection token to be used to override the default options for `mat-checkbox`. */\nexport const MAT_CHECKBOX_DEFAULT_OPTIONS =\n    new InjectionToken<MatCheckboxDefaultOptions>('mat-checkbox-default-options', {\n      providedIn: 'root',\n      factory: MAT_CHECKBOX_DEFAULT_OPTIONS_FACTORY\n    });\n\n/** @docs-private */\nexport function MAT_CHECKBOX_DEFAULT_OPTIONS_FACTORY(): MatCheckboxDefaultOptions {\n  return {\n    color: 'accent',\n    clickAction: 'check-indeterminate',\n  };\n}\n\n/**\n * Checkbox click action when user click on input element.\n * noop: Do not toggle checked or indeterminate.\n * check: Only toggle checked status, ignore indeterminate.\n * check-indeterminate: Toggle checked status, set indeterminate to false. Default behavior.\n * undefined: Same as `check-indeterminate`.\n */\nexport type MatCheckboxClickAction = 'noop' | 'check' | 'check-indeterminate' | undefined;\n\n/**\n * Injection token that can be used to specify the checkbox click behavior.\n * @deprecated Injection token will be removed, use `MAT_CHECKBOX_DEFAULT_OPTIONS` instead.\n * @breaking-change 10.0.0\n */\nexport const MAT_CHECKBOX_CLICK_ACTION =\n    new InjectionToken<MatCheckboxClickAction>('mat-checkbox-click-action');\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {FocusableOption, FocusMonitor, FocusOrigin} from '@angular/cdk/a11y';\nimport {BooleanInput, coerceBooleanProperty, NumberInput} from '@angular/cdk/coercion';\nimport {\n  AfterViewChecked,\n  Attribute,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ElementRef,\n  EventEmitter,\n  forwardRef,\n  Inject,\n  Input,\n  NgZone,\n  OnDestroy,\n  Optional,\n  Output,\n  ViewChild,\n  ViewEncapsulation,\n  AfterViewInit,\n} from '@angular/core';\nimport {ControlValueAccessor, NG_VALUE_ACCESSOR} from '@angular/forms';\nimport {\n  CanColor,\n  CanColorCtor,\n  CanDisable,\n  CanDisableCtor,\n  CanDisableRipple,\n  CanDisableRippleCtor,\n  HasTabIndex,\n  HasTabIndexCtor,\n  MatRipple,\n  mixinColor,\n  mixinDisabled,\n  mixinDisableRipple,\n  mixinTabIndex,\n} from '@angular/material/core';\nimport {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';\nimport {\n  MAT_CHECKBOX_CLICK_ACTION,\n  MAT_CHECKBOX_DEFAULT_OPTIONS,\n  MatCheckboxClickAction,\n  MatCheckboxDefaultOptions\n} from './checkbox-config';\n\n\n// Increasing integer for generating unique ids for checkbox components.\nlet nextUniqueId = 0;\n\n/**\n * Provider Expression that allows mat-checkbox to register as a ControlValueAccessor.\n * This allows it to support [(ngModel)].\n * @docs-private\n */\nexport const MAT_CHECKBOX_CONTROL_VALUE_ACCESSOR: any = {\n  provide: NG_VALUE_ACCESSOR,\n  useExisting: forwardRef(() => MatCheckbox),\n  multi: true\n};\n\n/**\n * Represents the different states that require custom transitions between them.\n * @docs-private\n */\nexport const enum TransitionCheckState {\n  /** The initial state of the component before any user interaction. */\n  Init,\n  /** The state representing the component when it's becoming checked. */\n  Checked,\n  /** The state representing the component when it's becoming unchecked. */\n  Unchecked,\n  /** The state representing the component when it's becoming indeterminate. */\n  Indeterminate\n}\n\n/** Change event object emitted by MatCheckbox. */\nexport class MatCheckboxChange {\n  /** The source MatCheckbox of the event. */\n  source: MatCheckbox;\n  /** The new `checked` value of the checkbox. */\n  checked: boolean;\n}\n\n// Boilerplate for applying mixins to MatCheckbox.\n/** @docs-private */\nclass MatCheckboxBase {\n  constructor(public _elementRef: ElementRef) {}\n}\nconst _MatCheckboxMixinBase:\n    HasTabIndexCtor &\n    CanColorCtor &\n    CanDisableRippleCtor &\n    CanDisableCtor &\n    typeof MatCheckboxBase =\n        mixinTabIndex(mixinColor(mixinDisableRipple(mixinDisabled(MatCheckboxBase))));\n\n\n/**\n * A material design checkbox component. Supports all of the functionality of an HTML5 checkbox,\n * and exposes a similar API. A MatCheckbox can be either checked, unchecked, indeterminate, or\n * disabled. Note that all additional accessibility attributes are taken care of by the component,\n * so there is no need to provide them yourself. However, if you want to omit a label and still\n * have the checkbox be accessible, you may supply an [aria-label] input.\n * See: https://material.io/design/components/selection-controls.html\n */\n@Component({\n  selector: 'mat-checkbox',\n  templateUrl: 'checkbox.html',\n  styleUrls: ['checkbox.css'],\n  exportAs: 'matCheckbox',\n  host: {\n    'class': 'mat-checkbox',\n    '[id]': 'id',\n    '[attr.tabindex]': 'null',\n    '[class.mat-checkbox-indeterminate]': 'indeterminate',\n    '[class.mat-checkbox-checked]': 'checked',\n    '[class.mat-checkbox-disabled]': 'disabled',\n    '[class.mat-checkbox-label-before]': 'labelPosition == \"before\"',\n    '[class._mat-animation-noopable]': `_animationMode === 'NoopAnimations'`,\n  },\n  providers: [MAT_CHECKBOX_CONTROL_VALUE_ACCESSOR],\n  inputs: ['disableRipple', 'color', 'tabIndex'],\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush\n})\nexport class MatCheckbox extends _MatCheckboxMixinBase implements ControlValueAccessor,\n    AfterViewInit, AfterViewChecked, OnDestroy, CanColor, CanDisable, HasTabIndex, CanDisableRipple,\n    FocusableOption {\n\n  /**\n   * Attached to the aria-label attribute of the host element. In most cases, aria-labelledby will\n   * take precedence so this may be omitted.\n   */\n  @Input('aria-label') ariaLabel: string = '';\n\n  /**\n   * Users can specify the `aria-labelledby` attribute which will be forwarded to the input element\n   */\n  @Input('aria-labelledby') ariaLabelledby: string | null = null;\n\n  /** The 'aria-describedby' attribute is read after the element's label and field type. */\n  @Input('aria-describedby') ariaDescribedby: string;\n\n  private _uniqueId: string = `mat-checkbox-${++nextUniqueId}`;\n\n  /** A unique id for the checkbox input. If none is supplied, it will be auto-generated. */\n  @Input() id: string = this._uniqueId;\n\n  /** Returns the unique id for the visual hidden input. */\n  get inputId(): string { return `${this.id || this._uniqueId}-input`; }\n\n  /** Whether the checkbox is required. */\n  @Input()\n  get required(): boolean { return this._required; }\n  set required(value: boolean) { this._required = coerceBooleanProperty(value); }\n  private _required: boolean;\n\n  /** Whether the label should appear after or before the checkbox. Defaults to 'after' */\n  @Input() labelPosition: 'before' | 'after' = 'after';\n\n  /** Name value will be applied to the input element if present */\n  @Input() name: string | null = null;\n\n  /** Event emitted when the checkbox's `checked` value changes. */\n  @Output() readonly change: EventEmitter<MatCheckboxChange> =\n      new EventEmitter<MatCheckboxChange>();\n\n  /** Event emitted when the checkbox's `indeterminate` value changes. */\n  @Output() readonly indeterminateChange: EventEmitter<boolean> = new EventEmitter<boolean>();\n\n  /** The value attribute of the native input element */\n  @Input() value: string;\n\n  /** The native `<input type=\"checkbox\">` element */\n  @ViewChild('input') _inputElement: ElementRef<HTMLInputElement>;\n\n  /** Reference to the ripple instance of the checkbox. */\n  @ViewChild(MatRipple) ripple: MatRipple;\n\n  /**\n   * Called when the checkbox is blurred. Needed to properly implement ControlValueAccessor.\n   * @docs-private\n   */\n  _onTouched: () => any = () => {};\n\n  private _currentAnimationClass: string = '';\n\n  private _currentCheckState: TransitionCheckState = TransitionCheckState.Init;\n\n  private _controlValueAccessorChangeFn: (value: any) => void = () => {};\n\n  constructor(elementRef: ElementRef<HTMLElement>,\n              private _changeDetectorRef: ChangeDetectorRef,\n              private _focusMonitor: FocusMonitor,\n              private _ngZone: NgZone,\n              @Attribute('tabindex') tabIndex: string,\n              /**\n               * @deprecated `_clickAction` parameter to be removed, use\n               * `MAT_CHECKBOX_DEFAULT_OPTIONS`\n               * @breaking-change 10.0.0\n               */\n              @Optional() @Inject(MAT_CHECKBOX_CLICK_ACTION)\n                  private _clickAction: MatCheckboxClickAction,\n              @Optional() @Inject(ANIMATION_MODULE_TYPE) public _animationMode?: string,\n              @Optional() @Inject(MAT_CHECKBOX_DEFAULT_OPTIONS)\n                  private _options?: MatCheckboxDefaultOptions) {\n    super(elementRef);\n    this._options = this._options || {};\n\n    if (this._options.color) {\n      this.color = this.defaultColor = this._options.color;\n    }\n\n    this.tabIndex = parseInt(tabIndex) || 0;\n\n    // TODO: Remove this after the `_clickAction` parameter is removed as an injection parameter.\n    this._clickAction = this._clickAction || this._options.clickAction;\n  }\n\n  ngAfterViewInit() {\n    this._focusMonitor.monitor(this._elementRef, true).subscribe(focusOrigin => {\n      if (!focusOrigin) {\n        // When a focused element becomes disabled, the browser *immediately* fires a blur event.\n        // Angular does not expect events to be raised during change detection, so any state change\n        // (such as a form control's 'ng-touched') will cause a changed-after-checked error.\n        // See https://github.com/angular/angular/issues/17793. To work around this, we defer\n        // telling the form control it has been touched until the next tick.\n        Promise.resolve().then(() => {\n          this._onTouched();\n          this._changeDetectorRef.markForCheck();\n        });\n      }\n    });\n\n    this._syncIndeterminate(this._indeterminate);\n  }\n\n  // TODO: Delete next major revision.\n  ngAfterViewChecked() {}\n\n  ngOnDestroy() {\n    this._focusMonitor.stopMonitoring(this._elementRef);\n  }\n\n  /**\n   * Whether the checkbox is checked.\n   */\n  @Input()\n  get checked(): boolean { return this._checked; }\n  set checked(value: boolean) {\n    if (value != this.checked) {\n      this._checked = value;\n      this._changeDetectorRef.markForCheck();\n    }\n  }\n  private _checked: boolean = false;\n\n  /**\n   * Whether the checkbox is disabled. This fully overrides the implementation provided by\n   * mixinDisabled, but the mixin is still required because mixinTabIndex requires it.\n   */\n  @Input()\n  get disabled() { return this._disabled; }\n  set disabled(value: any) {\n    const newValue = coerceBooleanProperty(value);\n\n    if (newValue !== this.disabled) {\n      this._disabled = newValue;\n      this._changeDetectorRef.markForCheck();\n    }\n  }\n  private _disabled: boolean = false;\n\n  /**\n   * Whether the checkbox is indeterminate. This is also known as \"mixed\" mode and can be used to\n   * represent a checkbox with three states, e.g. a checkbox that represents a nested list of\n   * checkable items. Note that whenever checkbox is manually clicked, indeterminate is immediately\n   * set to false.\n   */\n  @Input()\n  get indeterminate(): boolean { return this._indeterminate; }\n  set indeterminate(value: boolean) {\n    const changed = value != this._indeterminate;\n    this._indeterminate = coerceBooleanProperty(value);\n\n    if (changed) {\n      if (this._indeterminate) {\n        this._transitionCheckState(TransitionCheckState.Indeterminate);\n      } else {\n        this._transitionCheckState(\n          this.checked ? TransitionCheckState.Checked : TransitionCheckState.Unchecked);\n      }\n      this.indeterminateChange.emit(this._indeterminate);\n    }\n\n    this._syncIndeterminate(this._indeterminate);\n  }\n  private _indeterminate: boolean = false;\n\n  _isRippleDisabled() {\n    return this.disableRipple || this.disabled;\n  }\n\n  /** Method being called whenever the label text changes. */\n  _onLabelTextChange() {\n    // Since the event of the `cdkObserveContent` directive runs outside of the zone, the checkbox\n    // component will be only marked for check, but no actual change detection runs automatically.\n    // Instead of going back into the zone in order to trigger a change detection which causes\n    // *all* components to be checked (if explicitly marked or not using OnPush), we only trigger\n    // an explicit change detection for the checkbox view and its children.\n    this._changeDetectorRef.detectChanges();\n  }\n\n  // Implemented as part of ControlValueAccessor.\n  writeValue(value: any) {\n    this.checked = !!value;\n  }\n\n  // Implemented as part of ControlValueAccessor.\n  registerOnChange(fn: (value: any) => void) {\n    this._controlValueAccessorChangeFn = fn;\n  }\n\n  // Implemented as part of ControlValueAccessor.\n  registerOnTouched(fn: any) {\n    this._onTouched = fn;\n  }\n\n  // Implemented as part of ControlValueAccessor.\n  setDisabledState(isDisabled: boolean) {\n    this.disabled = isDisabled;\n  }\n\n  _getAriaChecked(): 'true' | 'false' | 'mixed' {\n    if (this.checked) {\n      return 'true';\n    }\n\n    return this.indeterminate ? 'mixed' : 'false';\n  }\n\n  private _transitionCheckState(newState: TransitionCheckState) {\n    let oldState = this._currentCheckState;\n    let element: HTMLElement = this._elementRef.nativeElement;\n\n    if (oldState === newState) {\n      return;\n    }\n    if (this._currentAnimationClass.length > 0) {\n      element.classList.remove(this._currentAnimationClass);\n    }\n\n    this._currentAnimationClass = this._getAnimationClassForCheckStateTransition(\n        oldState, newState);\n    this._currentCheckState = newState;\n\n    if (this._currentAnimationClass.length > 0) {\n      element.classList.add(this._currentAnimationClass);\n\n      // Remove the animation class to avoid animation when the checkbox is moved between containers\n      const animationClass = this._currentAnimationClass;\n\n      this._ngZone.runOutsideAngular(() => {\n        setTimeout(() => {\n          element.classList.remove(animationClass);\n        }, 1000);\n      });\n    }\n  }\n\n  private _emitChangeEvent() {\n    const event = new MatCheckboxChange();\n    event.source = this;\n    event.checked = this.checked;\n\n    this._controlValueAccessorChangeFn(this.checked);\n    this.change.emit(event);\n  }\n\n  /** Toggles the `checked` state of the checkbox. */\n  toggle(): void {\n    this.checked = !this.checked;\n  }\n\n  /**\n   * Event handler for checkbox input element.\n   * Toggles checked state if element is not disabled.\n   * Do not toggle on (change) event since IE doesn't fire change event when\n   *   indeterminate checkbox is clicked.\n   * @param event\n   */\n  _onInputClick(event: Event) {\n    // We have to stop propagation for click events on the visual hidden input element.\n    // By default, when a user clicks on a label element, a generated click event will be\n    // dispatched on the associated input element. Since we are using a label element as our\n    // root container, the click event on the `checkbox` will be executed twice.\n    // The real click event will bubble up, and the generated click event also tries to bubble up.\n    // This will lead to multiple click events.\n    // Preventing bubbling for the second event will solve that issue.\n    event.stopPropagation();\n\n    // If resetIndeterminate is false, and the current state is indeterminate, do nothing on click\n    if (!this.disabled && this._clickAction !== 'noop') {\n      // When user manually click on the checkbox, `indeterminate` is set to false.\n      if (this.indeterminate && this._clickAction !== 'check') {\n\n        Promise.resolve().then(() => {\n          this._indeterminate = false;\n          this.indeterminateChange.emit(this._indeterminate);\n        });\n      }\n\n      this.toggle();\n      this._transitionCheckState(\n          this._checked ? TransitionCheckState.Checked : TransitionCheckState.Unchecked);\n\n      // Emit our custom change event if the native input emitted one.\n      // It is important to only emit it, if the native input triggered one, because\n      // we don't want to trigger a change event, when the `checked` variable changes for example.\n      this._emitChangeEvent();\n    } else if (!this.disabled && this._clickAction === 'noop') {\n      // Reset native input when clicked with noop. The native checkbox becomes checked after\n      // click, reset it to be align with `checked` value of `mat-checkbox`.\n      this._inputElement.nativeElement.checked = this.checked;\n      this._inputElement.nativeElement.indeterminate = this.indeterminate;\n    }\n  }\n\n  /** Focuses the checkbox. */\n  focus(origin: FocusOrigin = 'keyboard', options?: FocusOptions): void {\n    this._focusMonitor.focusVia(this._inputElement, origin, options);\n  }\n\n  _onInteractionEvent(event: Event) {\n    // We always have to stop propagation on the change event.\n    // Otherwise the change event, from the input element, will bubble up and\n    // emit its event object to the `change` output.\n    event.stopPropagation();\n  }\n\n  private _getAnimationClassForCheckStateTransition(\n      oldState: TransitionCheckState, newState: TransitionCheckState): string {\n    // Don't transition if animations are disabled.\n    if (this._animationMode === 'NoopAnimations') {\n      return '';\n    }\n\n    let animSuffix: string = '';\n\n    switch (oldState) {\n      case TransitionCheckState.Init:\n        // Handle edge case where user interacts with checkbox that does not have [(ngModel)] or\n        // [checked] bound to it.\n        if (newState === TransitionCheckState.Checked) {\n          animSuffix = 'unchecked-checked';\n        } else if (newState == TransitionCheckState.Indeterminate) {\n          animSuffix = 'unchecked-indeterminate';\n        } else {\n          return '';\n        }\n        break;\n      case TransitionCheckState.Unchecked:\n        animSuffix = newState === TransitionCheckState.Checked ?\n            'unchecked-checked' : 'unchecked-indeterminate';\n        break;\n      case TransitionCheckState.Checked:\n        animSuffix = newState === TransitionCheckState.Unchecked ?\n            'checked-unchecked' : 'checked-indeterminate';\n        break;\n      case TransitionCheckState.Indeterminate:\n        animSuffix = newState === TransitionCheckState.Checked ?\n            'indeterminate-checked' : 'indeterminate-unchecked';\n        break;\n    }\n\n    return `mat-checkbox-anim-${animSuffix}`;\n  }\n\n  /**\n   * Syncs the indeterminate value with the checkbox DOM node.\n   *\n   * We sync `indeterminate` directly on the DOM node, because in Ivy the check for whether a\n   * property is supported on an element boils down to `if (propName in element)`. Domino's\n   * HTMLInputElement doesn't have an `indeterminate` property so Ivy will warn during\n   * server-side rendering.\n   */\n  private _syncIndeterminate(value: boolean) {\n    const nativeCheckbox = this._inputElement;\n\n    if (nativeCheckbox) {\n      nativeCheckbox.nativeElement.indeterminate = value;\n    }\n  }\n\n  static ngAcceptInputType_disabled: BooleanInput;\n  static ngAcceptInputType_required: BooleanInput;\n  static ngAcceptInputType_disableRipple: BooleanInput;\n  static ngAcceptInputType_indeterminate: BooleanInput;\n  static ngAcceptInputType_tabIndex: NumberInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  Directive,\n  forwardRef,\n  Provider,\n} from '@angular/core';\nimport {\n  CheckboxRequiredValidator,\n  NG_VALIDATORS,\n} from '@angular/forms';\n\nexport const MAT_CHECKBOX_REQUIRED_VALIDATOR: Provider = {\n  provide: NG_VALIDATORS,\n  useExisting: forwardRef(() => MatCheckboxRequiredValidator),\n  multi: true\n};\n\n/**\n * Validator for Material checkbox's required attribute in template-driven checkbox.\n * Current CheckboxRequiredValidator only work with `input type=checkbox` and does not\n * work with `mat-checkbox`.\n */\n@Directive({\n  selector: `mat-checkbox[required][formControlName],\n             mat-checkbox[required][formControl], mat-checkbox[required][ngModel]`,\n  providers: [MAT_CHECKBOX_REQUIRED_VALIDATOR],\n})\nexport class MatCheckboxRequiredValidator extends CheckboxRequiredValidator {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ObserversModule} from '@angular/cdk/observers';\nimport {NgModule} from '@angular/core';\nimport {MatCommonModule, MatRippleModule} from '@angular/material/core';\nimport {MatCheckbox} from './checkbox';\nimport {MatCheckboxRequiredValidator} from './checkbox-required-validator';\n\n/** This module is used by both original and MDC-based checkbox implementations. */\n@NgModule({\n  exports: [MatCheckboxRequiredValidator],\n  declarations: [MatCheckboxRequiredValidator],\n})\nexport class _MatCheckboxRequiredValidatorModule {\n}\n\n@NgModule({\n  imports: [\n    MatRippleModule, MatCommonModule, ObserversModule,\n    _MatCheckboxRequiredValidatorModule\n  ],\n  exports: [MatCheckbox, MatCommonModule, _MatCheckboxRequiredValidatorModule],\n  declarations: [MatCheckbox],\n})\nexport class MatCheckboxModule {\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './checkbox';\nexport * from './checkbox-config';\nexport * from './checkbox-module';\nexport * from './checkbox-required-validator';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {FocusMonitor, FocusableOption, FocusOrigin} from '@angular/cdk/a11y';\nimport {BooleanInput} from '@angular/cdk/coercion';\nimport {\n  ChangeDetectionStrategy,\n  Component,\n  ElementRef,\n  OnDestroy,\n  ViewChild,\n  ViewEncapsulation,\n  Optional,\n  Inject,\n  Input,\n  AfterViewInit,\n} from '@angular/core';\nimport {\n  CanColor,\n  CanDisable,\n  CanDisableRipple,\n  CanColorCtor,\n  CanDisableCtor,\n  CanDisableRippleCtor,\n  MatRipple,\n  mixinColor,\n  mixinDisabled,\n  mixinDisableRipple,\n} from '@angular/material/core';\nimport {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';\n\n/** Default color palette for round buttons (mat-fab and mat-mini-fab) */\nconst DEFAULT_ROUND_BUTTON_COLOR = 'accent';\n\n/**\n * List of classes to add to MatButton instances based on host attributes to\n * style as different variants.\n */\nconst BUTTON_HOST_ATTRIBUTES = [\n  'mat-button',\n  'mat-flat-button',\n  'mat-icon-button',\n  'mat-raised-button',\n  'mat-stroked-button',\n  'mat-mini-fab',\n  'mat-fab',\n];\n\n// Boilerplate for applying mixins to MatButton.\n/** @docs-private */\nclass MatButtonBase {\n  constructor(public _elementRef: ElementRef) {}\n}\n\nconst _MatButtonMixinBase: CanDisableRippleCtor & CanDisableCtor & CanColorCtor &\n    typeof MatButtonBase = mixinColor(mixinDisabled(mixinDisableRipple(MatButtonBase)));\n\n/**\n * Material design button.\n */\n@Component({\n  selector: `button[mat-button], button[mat-raised-button], button[mat-icon-button],\n             button[mat-fab], button[mat-mini-fab], button[mat-stroked-button],\n             button[mat-flat-button]`,\n  exportAs: 'matButton',\n  host: {\n    '[attr.disabled]': 'disabled || null',\n    '[class._mat-animation-noopable]': '_animationMode === \"NoopAnimations\"',\n    // Add a class for disabled button styling instead of the using attribute\n    // selector or pseudo-selector.  This allows users to create focusabled\n    // disabled buttons without recreating the styles.\n    '[class.mat-button-disabled]': 'disabled',\n    'class': 'mat-focus-indicator',\n  },\n  templateUrl: 'button.html',\n  styleUrls: ['button.css'],\n  inputs: ['disabled', 'disableRipple', 'color'],\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n})\nexport class MatButton extends _MatButtonMixinBase\n    implements AfterViewInit, OnDestroy, CanDisable, CanColor, CanDisableRipple, FocusableOption {\n\n  /** Whether the button is round. */\n  readonly isRoundButton: boolean = this._hasHostAttributes('mat-fab', 'mat-mini-fab');\n\n  /** Whether the button is icon button. */\n  readonly isIconButton: boolean = this._hasHostAttributes('mat-icon-button');\n\n  /** Reference to the MatRipple instance of the button. */\n  @ViewChild(MatRipple) ripple: MatRipple;\n\n  constructor(elementRef: ElementRef,\n              private _focusMonitor: FocusMonitor,\n              @Optional() @Inject(ANIMATION_MODULE_TYPE) public _animationMode: string) {\n    super(elementRef);\n\n    // For each of the variant selectors that is present in the button's host\n    // attributes, add the correct corresponding class.\n    for (const attr of BUTTON_HOST_ATTRIBUTES) {\n      if (this._hasHostAttributes(attr)) {\n        (this._getHostElement() as HTMLElement).classList.add(attr);\n      }\n    }\n\n    // Add a class that applies to all buttons. This makes it easier to target if somebody\n    // wants to target all Material buttons. We do it here rather than `host` to ensure that\n    // the class is applied to derived classes.\n    elementRef.nativeElement.classList.add('mat-button-base');\n\n    if (this.isRoundButton) {\n      this.color = DEFAULT_ROUND_BUTTON_COLOR;\n    }\n  }\n\n  ngAfterViewInit() {\n    this._focusMonitor.monitor(this._elementRef, true);\n  }\n\n  ngOnDestroy() {\n    this._focusMonitor.stopMonitoring(this._elementRef);\n  }\n\n  /** Focuses the button. */\n  focus(origin: FocusOrigin = 'program', options?: FocusOptions): void {\n    this._focusMonitor.focusVia(this._getHostElement(), origin, options);\n  }\n\n  _getHostElement() {\n    return this._elementRef.nativeElement;\n  }\n\n  _isRippleDisabled() {\n    return this.disableRipple || this.disabled;\n  }\n\n  /** Gets whether the button has one of the given attributes. */\n  _hasHostAttributes(...attributes: string[]) {\n    return attributes.some(attribute => this._getHostElement().hasAttribute(attribute));\n  }\n\n  static ngAcceptInputType_disabled: BooleanInput;\n  static ngAcceptInputType_disableRipple: BooleanInput;\n}\n\n/**\n * Material design anchor button.\n */\n@Component({\n  selector: `a[mat-button], a[mat-raised-button], a[mat-icon-button], a[mat-fab],\n             a[mat-mini-fab], a[mat-stroked-button], a[mat-flat-button]`,\n  exportAs: 'matButton, matAnchor',\n  host: {\n    // Note that we ignore the user-specified tabindex when it's disabled for\n    // consistency with the `mat-button` applied on native buttons where even\n    // though they have an index, they're not tabbable.\n    '[attr.tabindex]': 'disabled ? -1 : (tabIndex || 0)',\n    '[attr.disabled]': 'disabled || null',\n    '[attr.aria-disabled]': 'disabled.toString()',\n    '(click)': '_haltDisabledEvents($event)',\n    '[class._mat-animation-noopable]': '_animationMode === \"NoopAnimations\"',\n    '[class.mat-button-disabled]': 'disabled',\n    'class': 'mat-focus-indicator',\n  },\n  inputs: ['disabled', 'disableRipple', 'color'],\n  templateUrl: 'button.html',\n  styleUrls: ['button.css'],\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n})\nexport class MatAnchor extends MatButton {\n  /** Tabindex of the button. */\n  @Input() tabIndex: number;\n\n  constructor(\n    focusMonitor: FocusMonitor,\n    elementRef: ElementRef,\n    @Optional() @Inject(ANIMATION_MODULE_TYPE) animationMode: string) {\n    super(elementRef, focusMonitor, animationMode);\n  }\n\n  _haltDisabledEvents(event: Event) {\n    // A disabled button shouldn't apply any actions\n    if (this.disabled) {\n      event.preventDefault();\n      event.stopImmediatePropagation();\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgModule} from '@angular/core';\nimport {MatCommonModule, MatRippleModule} from '@angular/material/core';\nimport {MatAnchor, MatButton} from './button';\n\n\n@NgModule({\n  imports: [\n    MatRippleModule,\n    MatCommonModule,\n  ],\n  exports: [\n    MatButton,\n    MatAnchor,\n    MatCommonModule,\n  ],\n  declarations: [\n    MatButton,\n    MatAnchor,\n  ],\n})\nexport class MatButtonModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './button-module';\nexport * from './button';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar race_1 = require(\"../../operator/race\");\nrxjs_1.Observable.prototype.race = race_1.race;\n//# sourceMappingURL=race.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * @param scheduler\n * @return {Observable<Timestamp<any>>|WebSocketSubject<T>|Observable<T>}\n * @method timestamp\n * @owner Observable\n */\nfunction timestamp(scheduler) {\n    if (scheduler === void 0) { scheduler = rxjs_1.asyncScheduler; }\n    return operators_1.timestamp(scheduler)(this);\n}\nexports.timestamp = timestamp;\n//# sourceMappingURL=timestamp.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/* tslint:enable:max-line-length */\n/**\n * When any of the provided Observable emits an complete or error notification, it immediately subscribes to the next one\n * that was passed.\n *\n * <span class=\"informal\">Execute series of Observables no matter what, even if it means swallowing errors.</span>\n *\n * <img src=\"./img/onErrorResumeNext.png\" width=\"100%\">\n *\n * `onErrorResumeNext` is an operator that accepts a series of Observables, provided either directly as\n * arguments or as an array. If no single Observable is provided, returned Observable will simply behave the same\n * as the source.\n *\n * `onErrorResumeNext` returns an Observable that starts by subscribing and re-emitting values from the source Observable.\n * When its stream of values ends - no matter if Observable completed or emitted an error - `onErrorResumeNext`\n * will subscribe to the first Observable that was passed as an argument to the method. It will start re-emitting\n * its values as well and - again - when that stream ends, `onErrorResumeNext` will proceed to subscribing yet another\n * Observable in provided series, no matter if previous Observable completed or ended with an error. This will\n * be happening until there is no more Observables left in the series, at which point returned Observable will\n * complete - even if the last subscribed stream ended with an error.\n *\n * `onErrorResumeNext` can be therefore thought of as version of {@link concat} operator, which is more permissive\n * when it comes to the errors emitted by its input Observables. While `concat` subscribes to the next Observable\n * in series only if previous one successfully completed, `onErrorResumeNext` subscribes even if it ended with\n * an error.\n *\n * Note that you do not get any access to errors emitted by the Observables. In particular do not\n * expect these errors to appear in error callback passed to {@link subscribe}. If you want to take\n * specific actions based on what error was emitted by an Observable, you should try out {@link catch} instead.\n *\n *\n * @example <caption>Subscribe to the next Observable after map fails</caption>\n * Rx.Observable.of(1, 2, 3, 0)\n *   .map(x => {\n *       if (x === 0) { throw Error(); }\n         return 10 / x;\n *   })\n *   .onErrorResumeNext(Rx.Observable.of(1, 2, 3))\n *   .subscribe(\n *     val => console.log(val),\n *     err => console.log(err),          // Will never be called.\n *     () => console.log('that\\'s it!')\n *   );\n *\n * // Logs:\n * // 10\n * // 5\n * // 3.3333333333333335\n * // 1\n * // 2\n * // 3\n * // \"that's it!\"\n *\n * @see {@link concat}\n * @see {@link catch}\n *\n * @param {...ObservableInput} observables Observables passed either directly or as an array.\n * @return {Observable} An Observable that emits values from source Observable, but - if it errors - subscribes\n * to the next passed Observable and so on, until it completes or runs out of Observables.\n * @method onErrorResumeNext\n * @owner Observable\n */\nfunction onErrorResumeNext() {\n    var nextSources = [];\n    for (var _i = 0; _i < arguments.length; _i++) {\n        nextSources[_i] = arguments[_i];\n    }\n    return operators_1.onErrorResumeNext.apply(void 0, nextSources)(this);\n}\nexports.onErrorResumeNext = onErrorResumeNext;\n//# sourceMappingURL=onErrorResumeNext.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Delays the emission of items from the source Observable by a given timeout or\n * until a given Date.\n *\n * <span class=\"informal\">Time shifts each item by some specified amount of\n * milliseconds.</span>\n *\n * <img src=\"./img/delay.png\" width=\"100%\">\n *\n * If the delay argument is a Number, this operator time shifts the source\n * Observable by that amount of time expressed in milliseconds. The relative\n * time intervals between the values are preserved.\n *\n * If the delay argument is a Date, this operator time shifts the start of the\n * Observable execution until the given date occurs.\n *\n * @example <caption>Delay each click by one second</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var delayedClicks = clicks.delay(1000); // each click emitted after 1 second\n * delayedClicks.subscribe(x => console.log(x));\n *\n * @example <caption>Delay all clicks until a future date happens</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var date = new Date('March 15, 2050 12:00:00'); // in the future\n * var delayedClicks = clicks.delay(date); // click emitted only after that date\n * delayedClicks.subscribe(x => console.log(x));\n *\n * @see {@link debounceTime}\n * @see {@link delayWhen}\n *\n * @param {number|Date} delay The delay duration in milliseconds (a `number`) or\n * a `Date` until which the emission of the source items is delayed.\n * @param {Scheduler} [scheduler=asyncScheduler] The SchedulerLike to use for\n * managing the timers that handle the time-shift for each item.\n * @return {Observable} An Observable that delays the emissions of the source\n * Observable by the specified timeout or Date.\n * @method delay\n * @owner Observable\n */\nfunction delay(delay, scheduler) {\n    if (scheduler === void 0) { scheduler = rxjs_1.asyncScheduler; }\n    return operators_1.delay(delay, scheduler)(this);\n}\nexports.delay = delay;\n//# sourceMappingURL=delay.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar ajax_1 = require(\"rxjs/ajax\");\nrxjs_1.Observable.ajax = ajax_1.ajax;\n//# sourceMappingURL=ajax.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {coerceNumberProperty, NumberInput} from '@angular/cdk/coercion';\nimport {DOCUMENT} from '@angular/common';\nimport {\n  AfterViewInit,\n  ChangeDetectionStrategy,\n  Component,\n  ElementRef,\n  EventEmitter,\n  Inject,\n  inject,\n  InjectionToken,\n  Input,\n  NgZone,\n  OnDestroy,\n  Optional,\n  Output,\n  ViewChild,\n  ViewEncapsulation,\n} from '@angular/core';\nimport {CanColor, CanColorCtor, mixinColor} from '@angular/material/core';\nimport {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';\nimport {fromEvent, Observable, Subscription} from 'rxjs';\nimport {filter} from 'rxjs/operators';\n\n\n// TODO(josephperrott): Benchpress tests.\n// TODO(josephperrott): Add ARIA attributes for progress bar \"for\".\n\n/** Last animation end data. */\nexport interface ProgressAnimationEnd {\n  value: number;\n}\n\n// Boilerplate for applying mixins to MatProgressBar.\n/** @docs-private */\nclass MatProgressBarBase {\n  constructor(public _elementRef: ElementRef) { }\n}\n\nconst _MatProgressBarMixinBase: CanColorCtor & typeof MatProgressBarBase =\n    mixinColor(MatProgressBarBase, 'primary');\n\n/**\n * Injection token used to provide the current location to `MatProgressBar`.\n * Used to handle server-side rendering and to stub out during unit tests.\n * @docs-private\n */\nexport const MAT_PROGRESS_BAR_LOCATION = new InjectionToken<MatProgressBarLocation>(\n  'mat-progress-bar-location',\n  {providedIn: 'root', factory: MAT_PROGRESS_BAR_LOCATION_FACTORY}\n);\n\n/**\n * Stubbed out location for `MatProgressBar`.\n * @docs-private\n */\nexport interface MatProgressBarLocation {\n  getPathname: () => string;\n}\n\n/** @docs-private */\nexport function MAT_PROGRESS_BAR_LOCATION_FACTORY(): MatProgressBarLocation {\n  const _document = inject(DOCUMENT);\n  const _location = _document ? _document.location : null;\n\n  return {\n    // Note that this needs to be a function, rather than a property, because Angular\n    // will only resolve it once, but we want the current path on each call.\n    getPathname: () => _location ? (_location.pathname + _location.search) : ''\n  };\n}\n\nexport type ProgressBarMode = 'determinate' | 'indeterminate' | 'buffer' | 'query';\n\n/** Counter used to generate unique IDs for progress bars. */\nlet progressbarId = 0;\n\n/**\n * `<mat-progress-bar>` component.\n */\n@Component({\n  selector: 'mat-progress-bar',\n  exportAs: 'matProgressBar',\n  host: {\n    'role': 'progressbar',\n    'aria-valuemin': '0',\n    'aria-valuemax': '100',\n    '[attr.aria-valuenow]': '(mode === \"indeterminate\" || mode === \"query\") ? null : value',\n    '[attr.mode]': 'mode',\n    'class': 'mat-progress-bar',\n    '[class._mat-animation-noopable]': '_isNoopAnimation',\n  },\n  inputs: ['color'],\n  templateUrl: 'progress-bar.html',\n  styleUrls: ['progress-bar.css'],\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  encapsulation: ViewEncapsulation.None,\n})\nexport class MatProgressBar extends _MatProgressBarMixinBase implements CanColor,\n                                                      AfterViewInit, OnDestroy {\n  constructor(public _elementRef: ElementRef, private _ngZone: NgZone,\n              @Optional() @Inject(ANIMATION_MODULE_TYPE) public _animationMode?: string,\n              /**\n               * @deprecated `location` parameter to be made required.\n               * @breaking-change 8.0.0\n               */\n              @Optional() @Inject(MAT_PROGRESS_BAR_LOCATION) location?: MatProgressBarLocation) {\n    super(_elementRef);\n\n    // We need to prefix the SVG reference with the current path, otherwise they won't work\n    // in Safari if the page has a `<base>` tag. Note that we need quotes inside the `url()`,\n\n    // because named route URLs can contain parentheses (see #12338). Also we don't use since\n    // we can't tell the difference between whether\n    // the consumer is using the hash location strategy or not, because `Location` normalizes\n    // both `/#/foo/bar` and `/foo/bar` to the same thing.\n    const path = location ? location.getPathname().split('#')[0] : '';\n    this._rectangleFillValue = `url('${path}#${this.progressbarId}')`;\n    this._isNoopAnimation = _animationMode === 'NoopAnimations';\n  }\n\n  /** Flag that indicates whether NoopAnimations mode is set to true. */\n  _isNoopAnimation = false;\n\n  /** Value of the progress bar. Defaults to zero. Mirrored to aria-valuenow. */\n  @Input()\n  get value(): number { return this._value; }\n  set value(v: number) {\n    this._value = clamp(coerceNumberProperty(v) || 0);\n  }\n  private _value: number = 0;\n\n  /** Buffer value of the progress bar. Defaults to zero. */\n  @Input()\n  get bufferValue(): number { return this._bufferValue; }\n  set bufferValue(v: number) { this._bufferValue = clamp(v || 0); }\n  private _bufferValue: number = 0;\n\n  @ViewChild('primaryValueBar') _primaryValueBar: ElementRef;\n\n  /**\n   * Event emitted when animation of the primary progress bar completes. This event will not\n   * be emitted when animations are disabled, nor will it be emitted for modes with continuous\n   * animations (indeterminate and query).\n   */\n  @Output() animationEnd = new EventEmitter<ProgressAnimationEnd>();\n\n  /** Reference to animation end subscription to be unsubscribed on destroy. */\n  private _animationEndSubscription: Subscription = Subscription.EMPTY;\n\n  /**\n   * Mode of the progress bar.\n   *\n   * Input must be one of these values: determinate, indeterminate, buffer, query, defaults to\n   * 'determinate'.\n   * Mirrored to mode attribute.\n   */\n  @Input() mode: ProgressBarMode = 'determinate';\n\n  /** ID of the progress bar. */\n  progressbarId = `mat-progress-bar-${progressbarId++}`;\n\n  /** Attribute to be used for the `fill` attribute on the internal `rect` element. */\n  _rectangleFillValue: string;\n\n  /** Gets the current transform value for the progress bar's primary indicator. */\n  _primaryTransform() {\n    const scale = this.value / 100;\n    return {transform: `scaleX(${scale})`};\n  }\n\n  /**\n   * Gets the current transform value for the progress bar's buffer indicator. Only used if the\n   * progress mode is set to buffer, otherwise returns an undefined, causing no transformation.\n   */\n  _bufferTransform() {\n    if (this.mode === 'buffer') {\n      const scale = this.bufferValue / 100;\n      return {transform: `scaleX(${scale})`};\n    }\n    return null;\n  }\n\n  ngAfterViewInit() {\n    // Run outside angular so change detection didn't get triggered on every transition end\n    // instead only on the animation that we care about (primary value bar's transitionend)\n    this._ngZone.runOutsideAngular((() => {\n      const element = this._primaryValueBar.nativeElement;\n\n      this._animationEndSubscription =\n        (fromEvent(element, 'transitionend') as Observable<TransitionEvent>)\n          .pipe(filter(((e: TransitionEvent) => e.target === element)))\n          .subscribe(() => {\n            if (this.mode === 'determinate' || this.mode === 'buffer') {\n              this._ngZone.run(() => this.animationEnd.next({value: this.value}));\n            }\n          });\n    }));\n  }\n\n  ngOnDestroy() {\n    this._animationEndSubscription.unsubscribe();\n  }\n\n  static ngAcceptInputType_value: NumberInput;\n}\n\n/** Clamps a value to be between two numbers, by default 0 and 100. */\nfunction clamp(v: number, min = 0, max = 100) {\n  return Math.max(min, Math.min(max, v));\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgModule} from '@angular/core';\nimport {CommonModule} from '@angular/common';\nimport {MatCommonModule} from '@angular/material/core';\nimport {MatProgressBar} from './progress-bar';\n\n\n@NgModule({\n  imports: [CommonModule, MatCommonModule],\n  exports: [MatProgressBar, MatCommonModule],\n  declarations: [MatProgressBar],\n})\nexport class MatProgressBarModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './progress-bar-module';\nexport * from './progress-bar';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","export function isPromise(value) {\n    return !!value && typeof value.subscribe !== 'function' && typeof value.then === 'function';\n}\n//# sourceMappingURL=isPromise.js.map","import { SimpleOuterSubscriber, innerSubscribe, SimpleInnerSubscriber } from '../innerSubscribe';\nexport function sample(notifier) {\n    return (source) => source.lift(new SampleOperator(notifier));\n}\nclass SampleOperator {\n    constructor(notifier) {\n        this.notifier = notifier;\n    }\n    call(subscriber, source) {\n        const sampleSubscriber = new SampleSubscriber(subscriber);\n        const subscription = source.subscribe(sampleSubscriber);\n        subscription.add(innerSubscribe(this.notifier, new SimpleInnerSubscriber(sampleSubscriber)));\n        return subscription;\n    }\n}\nclass SampleSubscriber extends SimpleOuterSubscriber {\n    constructor() {\n        super(...arguments);\n        this.hasValue = false;\n    }\n    _next(value) {\n        this.value = value;\n        this.hasValue = true;\n    }\n    notifyNext() {\n        this.emitValue();\n    }\n    notifyComplete() {\n        this.emitValue();\n    }\n    emitValue() {\n        if (this.hasValue) {\n            this.hasValue = false;\n            this.destination.next(this.value);\n        }\n    }\n}\n//# sourceMappingURL=sample.js.map","let nextHandle = 1;\nconst RESOLVED = (() => Promise.resolve())();\nconst activeHandles = {};\nfunction findAndClearHandle(handle) {\n    if (handle in activeHandles) {\n        delete activeHandles[handle];\n        return true;\n    }\n    return false;\n}\nexport const Immediate = {\n    setImmediate(cb) {\n        const handle = nextHandle++;\n        activeHandles[handle] = true;\n        RESOLVED.then(() => findAndClearHandle(handle) && cb());\n        return handle;\n    },\n    clearImmediate(handle) {\n        findAndClearHandle(handle);\n    },\n};\nexport const TestTools = {\n    pending() {\n        return Object.keys(activeHandles).length;\n    }\n};\n//# sourceMappingURL=Immediate.js.map","import { Subscriber } from '../Subscriber';\nexport function find(predicate, thisArg) {\n    if (typeof predicate !== 'function') {\n        throw new TypeError('predicate is not a function');\n    }\n    return (source) => source.lift(new FindValueOperator(predicate, source, false, thisArg));\n}\nexport class FindValueOperator {\n    constructor(predicate, source, yieldIndex, thisArg) {\n        this.predicate = predicate;\n        this.source = source;\n        this.yieldIndex = yieldIndex;\n        this.thisArg = thisArg;\n    }\n    call(observer, source) {\n        return source.subscribe(new FindValueSubscriber(observer, this.predicate, this.source, this.yieldIndex, this.thisArg));\n    }\n}\nexport class FindValueSubscriber extends Subscriber {\n    constructor(destination, predicate, source, yieldIndex, thisArg) {\n        super(destination);\n        this.predicate = predicate;\n        this.source = source;\n        this.yieldIndex = yieldIndex;\n        this.thisArg = thisArg;\n        this.index = 0;\n    }\n    notifyComplete(value) {\n        const destination = this.destination;\n        destination.next(value);\n        destination.complete();\n        this.unsubscribe();\n    }\n    _next(value) {\n        const { predicate, thisArg } = this;\n        const index = this.index++;\n        try {\n            const result = predicate.call(thisArg || this, value, index, this.source);\n            if (result) {\n                this.notifyComplete(this.yieldIndex ? index : value);\n            }\n        }\n        catch (err) {\n            this.destination.error(err);\n        }\n    }\n    _complete() {\n        this.notifyComplete(this.yieldIndex ? -1 : undefined);\n    }\n}\n//# sourceMappingURL=find.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.timer = rxjs_1.timer;\n//# sourceMappingURL=timer.js.map","function _typeof(obj) {\n  \"@babel/helpers - typeof\";\n\n  if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {\n    module.exports = _typeof = function _typeof(obj) {\n      return typeof obj;\n    };\n  } else {\n    module.exports = _typeof = function _typeof(obj) {\n      return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;\n    };\n  }\n\n  return _typeof(obj);\n}\n\nmodule.exports = _typeof;","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT} from '@angular/common';\nimport {inject, InjectionToken} from '@angular/core';\n\n\n/**\n * Injection token used to inject the document into Directionality.\n * This is used so that the value can be faked in tests.\n *\n * We can't use the real document in tests because changing the real `dir` causes geometry-based\n * tests in Safari to fail.\n *\n * We also can't re-provide the DOCUMENT token from platform-brower because the unit tests\n * themselves use things like `querySelector` in test code.\n *\n * This token is defined in a separate file from Directionality as a workaround for\n * https://github.com/angular/angular/issues/22559\n *\n * @docs-private\n */\nexport const DIR_DOCUMENT = new InjectionToken<Document>('cdk-dir-doc', {\n  providedIn: 'root',\n  factory: DIR_DOCUMENT_FACTORY,\n});\n\n/** @docs-private */\nexport function DIR_DOCUMENT_FACTORY(): Document {\n  return inject(DOCUMENT);\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {EventEmitter, Inject, Injectable, Optional, OnDestroy} from '@angular/core';\nimport {DIR_DOCUMENT} from './dir-document-token';\n\n\nexport type Direction = 'ltr' | 'rtl';\n\n\n/**\n * The directionality (LTR / RTL) context for the application (or a subtree of it).\n * Exposes the current direction and a stream of direction changes.\n */\n@Injectable({providedIn: 'root'})\nexport class Directionality implements OnDestroy {\n  /** The current 'ltr' or 'rtl' value. */\n  readonly value: Direction = 'ltr';\n\n  /** Stream that emits whenever the 'ltr' / 'rtl' state changes. */\n  readonly change = new EventEmitter<Direction>();\n\n  constructor(@Optional() @Inject(DIR_DOCUMENT) _document?: any) {\n    if (_document) {\n      // TODO: handle 'auto' value -\n      // We still need to account for dir=\"auto\".\n      // It looks like HTMLElemenet.dir is also \"auto\" when that's set to the attribute,\n      // but getComputedStyle return either \"ltr\" or \"rtl\". avoiding getComputedStyle for now\n      const bodyDir = _document.body ? _document.body.dir : null;\n      const htmlDir = _document.documentElement ? _document.documentElement.dir : null;\n      const value = bodyDir || htmlDir;\n      this.value = (value === 'ltr' || value === 'rtl') ? value : 'ltr';\n    }\n  }\n\n  ngOnDestroy() {\n    this.change.complete();\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  Directive,\n  Output,\n  Input,\n  EventEmitter,\n  AfterContentInit,\n  OnDestroy,\n} from '@angular/core';\n\nimport {Direction, Directionality} from './directionality';\n\n/**\n * Directive to listen for changes of direction of part of the DOM.\n *\n * Provides itself as Directionality such that descendant directives only need to ever inject\n * Directionality to get the closest direction.\n */\n@Directive({\n  selector: '[dir]',\n  providers: [{provide: Directionality, useExisting: Dir}],\n  host: {'[attr.dir]': '_rawDir'},\n  exportAs: 'dir',\n})\nexport class Dir implements Directionality, AfterContentInit, OnDestroy {\n  /** Normalized direction that accounts for invalid/unsupported values. */\n  private _dir: Direction = 'ltr';\n\n  /** Whether the `value` has been set to its initial value. */\n  private _isInitialized: boolean = false;\n\n  /** Direction as passed in by the consumer. */\n  _rawDir: string;\n\n  /** Event emitted when the direction changes. */\n  @Output('dirChange') change = new EventEmitter<Direction>();\n\n  /** @docs-private */\n  @Input()\n  get dir(): Direction { return this._dir; }\n  set dir(value: Direction) {\n    const old = this._dir;\n    const normalizedValue = value ? value.toLowerCase() : value;\n\n    this._rawDir = value;\n    this._dir = (normalizedValue === 'ltr' || normalizedValue === 'rtl') ? normalizedValue : 'ltr';\n\n    if (old !== this._dir && this._isInitialized) {\n      this.change.emit(this._dir);\n    }\n  }\n\n  /** Current layout direction of the element. */\n  get value(): Direction { return this.dir; }\n\n  /** Initialize once default value has been set. */\n  ngAfterContentInit() {\n    this._isInitialized = true;\n  }\n\n  ngOnDestroy() {\n    this.change.complete();\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgModule} from '@angular/core';\nimport {Dir} from './dir';\n\n\n@NgModule({\n  exports: [Dir],\n  declarations: [Dir],\n})\nexport class BidiModule { }\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport {Directionality, Direction} from './directionality';\nexport {DIR_DOCUMENT} from './dir-document-token';\nexport {Dir} from './dir';\nexport * from './bidi-module';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n\nexport {DIR_DOCUMENT_FACTORY as ɵangular_material_src_cdk_bidi_bidi_a} from './dir-document-token';","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Returns an Observable that emits whether or not every item of the source satisfies the condition specified.\n *\n * @example <caption>A simple example emitting true if all elements are less than 5, false otherwise</caption>\n *  Observable.of(1, 2, 3, 4, 5, 6)\n *     .every(x => x < 5)\n *     .subscribe(x => console.log(x)); // -> false\n *\n * @param {function} predicate A function for determining if an item meets a specified condition.\n * @param {any} [thisArg] Optional object to use for `this` in the callback.\n * @return {Observable} An Observable of booleans that determines if all items of the source Observable meet the condition specified.\n * @method every\n * @owner Observable\n */\nfunction every(predicate, thisArg) {\n    return operators_1.every(predicate, thisArg)(this);\n}\nexports.every = every;\n//# sourceMappingURL=every.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar merge_1 = require(\"../../operator/merge\");\nrxjs_1.Observable.prototype.merge = merge_1.merge;\n//# sourceMappingURL=merge.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Buffers the source Observable values, using a factory function of closing\n * Observables to determine when to close, emit, and reset the buffer.\n *\n * <span class=\"informal\">Collects values from the past as an array. When it\n * starts collecting values, it calls a function that returns an Observable that\n * tells when to close the buffer and restart collecting.</span>\n *\n * <img src=\"./img/bufferWhen.png\" width=\"100%\">\n *\n * Opens a buffer immediately, then closes the buffer when the observable\n * returned by calling `closingSelector` function emits a value. When it closes\n * the buffer, it immediately opens a new buffer and repeats the process.\n *\n * @example <caption>Emit an array of the last clicks every [1-5] random seconds</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var buffered = clicks.bufferWhen(() =>\n *   Rx.Observable.interval(1000 + Math.random() * 4000)\n * );\n * buffered.subscribe(x => console.log(x));\n *\n * @see {@link buffer}\n * @see {@link bufferCount}\n * @see {@link bufferTime}\n * @see {@link bufferToggle}\n * @see {@link windowWhen}\n *\n * @param {function(): Observable} closingSelector A function that takes no\n * arguments and returns an Observable that signals buffer closure.\n * @return {Observable<T[]>} An observable of arrays of buffered values.\n * @method bufferWhen\n * @owner Observable\n */\nfunction bufferWhen(closingSelector) {\n    return operators_1.bufferWhen(closingSelector)(this);\n}\nexports.bufferWhen = bufferWhen;\n//# sourceMappingURL=bufferWhen.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Converts a higher-order Observable into a first-order Observable by\n * concatenating the inner Observables in order.\n *\n * <span class=\"informal\">Flattens an Observable-of-Observables by putting one\n * inner Observable after the other.</span>\n *\n * <img src=\"./img/concatAll.png\" width=\"100%\">\n *\n * Joins every Observable emitted by the source (a higher-order Observable), in\n * a serial fashion. It subscribes to each inner Observable only after the\n * previous inner Observable has completed, and merges all of their values into\n * the returned observable.\n *\n * __Warning:__ If the source Observable emits Observables quickly and\n * endlessly, and the inner Observables it emits generally complete slower than\n * the source emits, you can run into memory issues as the incoming Observables\n * collect in an unbounded buffer.\n *\n * Note: `concatAll` is equivalent to `mergeAll` with concurrency parameter set\n * to `1`.\n *\n * @example <caption>For each click event, tick every second from 0 to 3, with no concurrency</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var higherOrder = clicks.map(ev => Rx.Observable.interval(1000).take(4));\n * var firstOrder = higherOrder.concatAll();\n * firstOrder.subscribe(x => console.log(x));\n *\n * // Results in the following:\n * // (results are not concurrent)\n * // For every click on the \"document\" it will emit values 0 to 3 spaced\n * // on a 1000ms interval\n * // one click = 1000ms-> 0 -1000ms-> 1 -1000ms-> 2 -1000ms-> 3\n *\n * @see {@link combineAll}\n * @see {@link concat}\n * @see {@link concatMap}\n * @see {@link concatMapTo}\n * @see {@link exhaust}\n * @see {@link mergeAll}\n * @see {@link switch}\n * @see {@link zipAll}\n *\n * @return {Observable} An Observable emitting values from all the inner\n * Observables concatenated.\n * @method concatAll\n * @owner Observable\n */\nfunction concatAll() {\n    return operators_1.concatAll()(this);\n}\nexports.concatAll = concatAll;\n//# sourceMappingURL=concatAll.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar withLatestFrom_1 = require(\"../../operator/withLatestFrom\");\nrxjs_1.Observable.prototype.withLatestFrom = withLatestFrom_1.withLatestFrom;\n//# sourceMappingURL=withLatestFrom.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Ignores source values for a duration determined by another Observable, then\n * emits the most recent value from the source Observable, then repeats this\n * process.\n *\n * <span class=\"informal\">It's like {@link auditTime}, but the silencing\n * duration is determined by a second Observable.</span>\n *\n * <img src=\"./img/audit.png\" width=\"100%\">\n *\n * `audit` is similar to `throttle`, but emits the last value from the silenced\n * time window, instead of the first value. `audit` emits the most recent value\n * from the source Observable on the output Observable as soon as its internal\n * timer becomes disabled, and ignores source values while the timer is enabled.\n * Initially, the timer is disabled. As soon as the first source value arrives,\n * the timer is enabled by calling the `durationSelector` function with the\n * source value, which returns the \"duration\" Observable. When the duration\n * Observable emits a value or completes, the timer is disabled, then the most\n * recent source value is emitted on the output Observable, and this process\n * repeats for the next source value.\n *\n * @example <caption>Emit clicks at a rate of at most one click per second</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.audit(ev => Rx.Observable.interval(1000));\n * result.subscribe(x => console.log(x));\n *\n * @see {@link auditTime}\n * @see {@link debounce}\n * @see {@link delayWhen}\n * @see {@link sample}\n * @see {@link throttle}\n *\n * @param {function(value: T): SubscribableOrPromise} durationSelector A function\n * that receives a value from the source Observable, for computing the silencing\n * duration, returned as an Observable or a Promise.\n * @return {Observable<T>} An Observable that performs rate-limiting of\n * emissions from the source Observable.\n * @method audit\n * @owner Observable\n */\nfunction audit(durationSelector) {\n    return operators_1.audit(durationSelector)(this);\n}\nexports.audit = audit;\n//# sourceMappingURL=audit.js.map","import { Subscriber } from '../Subscriber';\nimport { Observable } from '../Observable';\nimport { OuterSubscriber } from '../OuterSubscriber';\nimport { subscribeToResult } from '../util/subscribeToResult';\nexport function delayWhen(delayDurationSelector, subscriptionDelay) {\n    if (subscriptionDelay) {\n        return (source) => new SubscriptionDelayObservable(source, subscriptionDelay)\n            .lift(new DelayWhenOperator(delayDurationSelector));\n    }\n    return (source) => source.lift(new DelayWhenOperator(delayDurationSelector));\n}\nclass DelayWhenOperator {\n    constructor(delayDurationSelector) {\n        this.delayDurationSelector = delayDurationSelector;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new DelayWhenSubscriber(subscriber, this.delayDurationSelector));\n    }\n}\nclass DelayWhenSubscriber extends OuterSubscriber {\n    constructor(destination, delayDurationSelector) {\n        super(destination);\n        this.delayDurationSelector = delayDurationSelector;\n        this.completed = false;\n        this.delayNotifierSubscriptions = [];\n        this.index = 0;\n    }\n    notifyNext(outerValue, _innerValue, _outerIndex, _innerIndex, innerSub) {\n        this.destination.next(outerValue);\n        this.removeSubscription(innerSub);\n        this.tryComplete();\n    }\n    notifyError(error, innerSub) {\n        this._error(error);\n    }\n    notifyComplete(innerSub) {\n        const value = this.removeSubscription(innerSub);\n        if (value) {\n            this.destination.next(value);\n        }\n        this.tryComplete();\n    }\n    _next(value) {\n        const index = this.index++;\n        try {\n            const delayNotifier = this.delayDurationSelector(value, index);\n            if (delayNotifier) {\n                this.tryDelay(delayNotifier, value);\n            }\n        }\n        catch (err) {\n            this.destination.error(err);\n        }\n    }\n    _complete() {\n        this.completed = true;\n        this.tryComplete();\n        this.unsubscribe();\n    }\n    removeSubscription(subscription) {\n        subscription.unsubscribe();\n        const subscriptionIdx = this.delayNotifierSubscriptions.indexOf(subscription);\n        if (subscriptionIdx !== -1) {\n            this.delayNotifierSubscriptions.splice(subscriptionIdx, 1);\n        }\n        return subscription.outerValue;\n    }\n    tryDelay(delayNotifier, value) {\n        const notifierSubscription = subscribeToResult(this, delayNotifier, value);\n        if (notifierSubscription && !notifierSubscription.closed) {\n            const destination = this.destination;\n            destination.add(notifierSubscription);\n            this.delayNotifierSubscriptions.push(notifierSubscription);\n        }\n    }\n    tryComplete() {\n        if (this.completed && this.delayNotifierSubscriptions.length === 0) {\n            this.destination.complete();\n        }\n    }\n}\nclass SubscriptionDelayObservable extends Observable {\n    constructor(source, subscriptionDelay) {\n        super();\n        this.source = source;\n        this.subscriptionDelay = subscriptionDelay;\n    }\n    _subscribe(subscriber) {\n        this.subscriptionDelay.subscribe(new SubscriptionDelaySubscriber(subscriber, this.source));\n    }\n}\nclass SubscriptionDelaySubscriber extends Subscriber {\n    constructor(parent, source) {\n        super();\n        this.parent = parent;\n        this.source = source;\n        this.sourceSubscribed = false;\n    }\n    _next(unused) {\n        this.subscribeToSource();\n    }\n    _error(err) {\n        this.unsubscribe();\n        this.parent.error(err);\n    }\n    _complete() {\n        this.unsubscribe();\n        this.subscribeToSource();\n    }\n    subscribeToSource() {\n        if (!this.sourceSubscribed) {\n            this.sourceSubscribed = true;\n            this.unsubscribe();\n            this.source.subscribe(this.parent);\n        }\n    }\n}\n//# sourceMappingURL=delayWhen.js.map","import { Observable } from '../Observable';\nimport { isArray } from '../util/isArray';\nimport { map } from '../operators/map';\nimport { isObject } from '../util/isObject';\nimport { from } from './from';\nexport function forkJoin(...sources) {\n    if (sources.length === 1) {\n        const first = sources[0];\n        if (isArray(first)) {\n            return forkJoinInternal(first, null);\n        }\n        if (isObject(first) && Object.getPrototypeOf(first) === Object.prototype) {\n            const keys = Object.keys(first);\n            return forkJoinInternal(keys.map(key => first[key]), keys);\n        }\n    }\n    if (typeof sources[sources.length - 1] === 'function') {\n        const resultSelector = sources.pop();\n        sources = (sources.length === 1 && isArray(sources[0])) ? sources[0] : sources;\n        return forkJoinInternal(sources, null).pipe(map((args) => resultSelector(...args)));\n    }\n    return forkJoinInternal(sources, null);\n}\nfunction forkJoinInternal(sources, keys) {\n    return new Observable(subscriber => {\n        const len = sources.length;\n        if (len === 0) {\n            subscriber.complete();\n            return;\n        }\n        const values = new Array(len);\n        let completed = 0;\n        let emitted = 0;\n        for (let i = 0; i < len; i++) {\n            const source = from(sources[i]);\n            let hasValue = false;\n            subscriber.add(source.subscribe({\n                next: value => {\n                    if (!hasValue) {\n                        hasValue = true;\n                        emitted++;\n                    }\n                    values[i] = value;\n                },\n                error: err => subscriber.error(err),\n                complete: () => {\n                    completed++;\n                    if (completed === len || !hasValue) {\n                        if (emitted === len) {\n                            subscriber.next(keys ?\n                                keys.reduce((result, key, i) => (result[key] = values[i], result), {}) :\n                                values);\n                        }\n                        subscriber.complete();\n                    }\n                }\n            }));\n        }\n    });\n}\n//# sourceMappingURL=forkJoin.js.map","import { Subscriber } from '../Subscriber';\nimport { EmptyError } from '../util/EmptyError';\nexport function single(predicate) {\n    return (source) => source.lift(new SingleOperator(predicate, source));\n}\nclass SingleOperator {\n    constructor(predicate, source) {\n        this.predicate = predicate;\n        this.source = source;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new SingleSubscriber(subscriber, this.predicate, this.source));\n    }\n}\nclass SingleSubscriber extends Subscriber {\n    constructor(destination, predicate, source) {\n        super(destination);\n        this.predicate = predicate;\n        this.source = source;\n        this.seenValue = false;\n        this.index = 0;\n    }\n    applySingleValue(value) {\n        if (this.seenValue) {\n            this.destination.error('Sequence contains more than one element');\n        }\n        else {\n            this.seenValue = true;\n            this.singleValue = value;\n        }\n    }\n    _next(value) {\n        const index = this.index++;\n        if (this.predicate) {\n            this.tryNext(value, index);\n        }\n        else {\n            this.applySingleValue(value);\n        }\n    }\n    tryNext(value, index) {\n        try {\n            if (this.predicate(value, index, this.source)) {\n                this.applySingleValue(value);\n            }\n        }\n        catch (err) {\n            this.destination.error(err);\n        }\n    }\n    _complete() {\n        const destination = this.destination;\n        if (this.index > 0) {\n            destination.next(this.seenValue ? this.singleValue : undefined);\n            destination.complete();\n        }\n        else {\n            destination.error(new EmptyError);\n        }\n    }\n}\n//# sourceMappingURL=single.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.using = rxjs_1.using;\n//# sourceMappingURL=using.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  animate,\n  animateChild,\n  AnimationTriggerMetadata,\n  query,\n  state,\n  style,\n  transition,\n  trigger,\n} from '@angular/animations';\n\n/**\n * The following are all the animations for the mat-select component, with each\n * const containing the metadata for one animation.\n *\n * The values below match the implementation of the AngularJS Material mat-select animation.\n * @docs-private\n */\nexport const matSelectAnimations: {\n  readonly transformPanelWrap: AnimationTriggerMetadata;\n  readonly transformPanel: AnimationTriggerMetadata;\n} = {\n  /**\n   * This animation ensures the select's overlay panel animation (transformPanel) is called when\n   * closing the select.\n   * This is needed due to https://github.com/angular/angular/issues/23302\n   */\n  transformPanelWrap: trigger('transformPanelWrap', [\n      transition('* => void', query('@transformPanel', [animateChild()],\n          {optional: true}))\n  ]),\n\n  /**\n   * This animation transforms the select's overlay panel on and off the page.\n   *\n   * When the panel is attached to the DOM, it expands its width by the amount of padding, scales it\n   * up to 100% on the Y axis, fades in its border, and translates slightly up and to the\n   * side to ensure the option text correctly overlaps the trigger text.\n   *\n   * When the panel is removed from the DOM, it simply fades out linearly.\n   */\n  transformPanel: trigger('transformPanel', [\n    state('void', style({\n      transform: 'scaleY(0.8)',\n      minWidth: '100%',\n      opacity: 0\n    })),\n    state('showing', style({\n      opacity: 1,\n      minWidth: 'calc(100% + 32px)', // 32px = 2 * 16px padding\n      transform: 'scaleY(1)'\n    })),\n    state('showing-multiple', style({\n      opacity: 1,\n      minWidth: 'calc(100% + 64px)', // 64px = 48px padding on the left + 16px padding on the right\n      transform: 'scaleY(1)'\n    })),\n    transition('void => *', animate('120ms cubic-bezier(0, 0, 0.2, 1)')),\n    transition('* => void', animate('100ms 25ms linear', style({opacity: 0})))\n  ])\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * Returns an exception to be thrown when attempting to change a select's `multiple` option\n * after initialization.\n * @docs-private\n */\nexport function getMatSelectDynamicMultipleError(): Error {\n  return Error('Cannot change `multiple` mode of select after initialization.');\n}\n\n/**\n * Returns an exception to be thrown when attempting to assign a non-array value to a select\n * in `multiple` mode. Note that `undefined` and `null` are still valid values to allow for\n * resetting the value.\n * @docs-private\n */\nexport function getMatSelectNonArrayValueError(): Error {\n  return Error('Value must be an array in multiple-selection mode.');\n}\n\n/**\n * Returns an exception to be thrown when assigning a non-function value to the comparator\n * used to determine if a value corresponds to an option. Note that whether the function\n * actually takes two values and returns a boolean is not checked.\n */\nexport function getMatSelectNonFunctionValueError(): Error {\n  return Error('`compareWith` must be a function.');\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ActiveDescendantKeyManager, LiveAnnouncer} from '@angular/cdk/a11y';\nimport {Directionality} from '@angular/cdk/bidi';\nimport {\n  BooleanInput,\n  coerceBooleanProperty,\n  coerceNumberProperty,\n  NumberInput\n} from '@angular/cdk/coercion';\nimport {SelectionModel} from '@angular/cdk/collections';\nimport {\n  A,\n  DOWN_ARROW,\n  ENTER,\n  hasModifierKey,\n  LEFT_ARROW,\n  RIGHT_ARROW,\n  SPACE,\n  UP_ARROW,\n} from '@angular/cdk/keycodes';\nimport {\n  CdkConnectedOverlay,\n  ConnectedPosition,\n  Overlay,\n  ScrollStrategy,\n} from '@angular/cdk/overlay';\nimport {ViewportRuler} from '@angular/cdk/scrolling';\nimport {\n  AfterContentInit,\n  Attribute,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ContentChild,\n  ContentChildren,\n  Directive,\n  DoCheck,\n  ElementRef,\n  EventEmitter,\n  Inject,\n  InjectionToken,\n  Input,\n  NgZone,\n  OnChanges,\n  OnDestroy,\n  OnInit,\n  Optional,\n  Output,\n  QueryList,\n  Self,\n  SimpleChanges,\n  ViewChild,\n  ViewEncapsulation,\n} from '@angular/core';\nimport {ControlValueAccessor, FormGroupDirective, NgControl, NgForm} from '@angular/forms';\nimport {\n  _countGroupLabelsBeforeOption,\n  _getOptionScrollPosition,\n  CanDisable,\n  CanDisableCtor,\n  CanDisableRipple,\n  CanDisableRippleCtor,\n  CanUpdateErrorState,\n  CanUpdateErrorStateCtor,\n  ErrorStateMatcher,\n  HasTabIndex,\n  HasTabIndexCtor,\n  MAT_OPTGROUP,\n  MAT_OPTION_PARENT_COMPONENT,\n  MatOptgroup,\n  MatOption,\n  MatOptionSelectionChange,\n  mixinDisabled,\n  mixinDisableRipple,\n  mixinErrorState,\n  mixinTabIndex,\n} from '@angular/material/core';\nimport {MAT_FORM_FIELD, MatFormField, MatFormFieldControl} from '@angular/material/form-field';\nimport {defer, merge, Observable, Subject} from 'rxjs';\nimport {\n  distinctUntilChanged,\n  filter,\n  map,\n  startWith,\n  switchMap,\n  take,\n  takeUntil,\n} from 'rxjs/operators';\nimport {matSelectAnimations} from './select-animations';\nimport {\n  getMatSelectDynamicMultipleError,\n  getMatSelectNonArrayValueError,\n  getMatSelectNonFunctionValueError,\n} from './select-errors';\n\n\nlet nextUniqueId = 0;\n\n/**\n * The following style constants are necessary to save here in order\n * to properly calculate the alignment of the selected option over\n * the trigger element.\n */\n\n/** The max height of the select's overlay panel */\nexport const SELECT_PANEL_MAX_HEIGHT = 256;\n\n/** The panel's padding on the x-axis */\nexport const SELECT_PANEL_PADDING_X = 16;\n\n/** The panel's x axis padding if it is indented (e.g. there is an option group). */\nexport const SELECT_PANEL_INDENT_PADDING_X = SELECT_PANEL_PADDING_X * 2;\n\n/** The height of the select items in `em` units. */\nexport const SELECT_ITEM_HEIGHT_EM = 3;\n\n// TODO(josephperrott): Revert to a constant after 2018 spec updates are fully merged.\n/**\n * Distance between the panel edge and the option text in\n * multi-selection mode.\n *\n * Calculated as:\n * (SELECT_PANEL_PADDING_X * 1.5) + 16 = 40\n * The padding is multiplied by 1.5 because the checkbox's margin is half the padding.\n * The checkbox width is 16px.\n */\nexport const SELECT_MULTIPLE_PANEL_PADDING_X = SELECT_PANEL_PADDING_X * 1.5 + 16;\n\n/**\n * The select panel will only \"fit\" inside the viewport if it is positioned at\n * this value or more away from the viewport boundary.\n */\nexport const SELECT_PANEL_VIEWPORT_PADDING = 8;\n\n/** Injection token that determines the scroll handling while a select is open. */\nexport const MAT_SELECT_SCROLL_STRATEGY =\n    new InjectionToken<() => ScrollStrategy>('mat-select-scroll-strategy');\n\n/** @docs-private */\nexport function MAT_SELECT_SCROLL_STRATEGY_PROVIDER_FACTORY(overlay: Overlay):\n    () => ScrollStrategy {\n  return () => overlay.scrollStrategies.reposition();\n}\n\n/** Object that can be used to configure the default options for the select module. */\nexport interface MatSelectConfig {\n  /** Whether option centering should be disabled. */\n  disableOptionCentering?: boolean;\n\n  /** Time to wait in milliseconds after the last keystroke before moving focus to an item. */\n  typeaheadDebounceInterval?: number;\n}\n\n/** Injection token that can be used to provide the default options the select module. */\nexport const MAT_SELECT_CONFIG = new InjectionToken<MatSelectConfig>('MAT_SELECT_CONFIG');\n\n/** @docs-private */\nexport const MAT_SELECT_SCROLL_STRATEGY_PROVIDER = {\n  provide: MAT_SELECT_SCROLL_STRATEGY,\n  deps: [Overlay],\n  useFactory: MAT_SELECT_SCROLL_STRATEGY_PROVIDER_FACTORY,\n};\n\n/** Change event object that is emitted when the select value has changed. */\nexport class MatSelectChange {\n  constructor(\n    /** Reference to the select that emitted the change event. */\n    public source: MatSelect,\n    /** Current value of the select that emitted the event. */\n    public value: any) { }\n}\n\n// Boilerplate for applying mixins to MatSelect.\n/** @docs-private */\nclass MatSelectBase {\n  constructor(public _elementRef: ElementRef,\n              public _defaultErrorStateMatcher: ErrorStateMatcher,\n              public _parentForm: NgForm,\n              public _parentFormGroup: FormGroupDirective,\n              public ngControl: NgControl) {}\n}\nconst _MatSelectMixinBase:\n    CanDisableCtor &\n    HasTabIndexCtor &\n    CanDisableRippleCtor &\n    CanUpdateErrorStateCtor &\n    typeof MatSelectBase =\n        mixinDisableRipple(mixinTabIndex(mixinDisabled(mixinErrorState(MatSelectBase))));\n\n\n\n/**\n * Injection token that can be used to reference instances of `MatSelectTrigger`. It serves as\n * alternative token to the actual `MatSelectTrigger` class which could cause unnecessary\n * retention of the class and its directive metadata.\n */\nexport const MAT_SELECT_TRIGGER = new InjectionToken<MatSelectTrigger>('MatSelectTrigger');\n\n/**\n * Allows the user to customize the trigger that is displayed when the select has a value.\n */\n@Directive({\n  selector: 'mat-select-trigger',\n  providers: [{provide: MAT_SELECT_TRIGGER, useExisting: MatSelectTrigger}],\n})\nexport class MatSelectTrigger {}\n\n@Component({\n  selector: 'mat-select',\n  exportAs: 'matSelect',\n  templateUrl: 'select.html',\n  styleUrls: ['select.css'],\n  inputs: ['disabled', 'disableRipple', 'tabIndex'],\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  host: {\n    'role': 'combobox',\n    'aria-autocomplete': 'none',\n    // TODO(crisbeto): the value for aria-haspopup should be `listbox`, but currently it's difficult\n    // to sync into g3, because of an outdated automated a11y check which flags it as an invalid\n    // value. At some point we should try to switch it back to being `listbox`. When doing the\n    // MDC-based `mat-select`, we can get away with starting it off as `listbox`.\n    'aria-haspopup': 'true',\n    'class': 'mat-select',\n    '[attr.id]': 'id',\n    '[attr.tabindex]': 'tabIndex',\n    '[attr.aria-controls]': 'panelOpen ? id + \"-panel\" : null',\n    '[attr.aria-expanded]': 'panelOpen',\n    '[attr.aria-label]': 'ariaLabel || null',\n    '[attr.aria-required]': 'required.toString()',\n    '[attr.aria-disabled]': 'disabled.toString()',\n    '[attr.aria-invalid]': 'errorState',\n    '[attr.aria-describedby]': '_ariaDescribedby || null',\n    '[attr.aria-activedescendant]': '_getAriaActiveDescendant()',\n    '[class.mat-select-disabled]': 'disabled',\n    '[class.mat-select-invalid]': 'errorState',\n    '[class.mat-select-required]': 'required',\n    '[class.mat-select-empty]': 'empty',\n    '[class.mat-select-multiple]': 'multiple',\n    '(keydown)': '_handleKeydown($event)',\n    '(focus)': '_onFocus()',\n    '(blur)': '_onBlur()',\n  },\n  animations: [\n    matSelectAnimations.transformPanelWrap,\n    matSelectAnimations.transformPanel\n  ],\n  providers: [\n    {provide: MatFormFieldControl, useExisting: MatSelect},\n    {provide: MAT_OPTION_PARENT_COMPONENT, useExisting: MatSelect}\n  ],\n})\nexport class MatSelect extends _MatSelectMixinBase implements AfterContentInit, OnChanges,\n    OnDestroy, OnInit, DoCheck, ControlValueAccessor, CanDisable, HasTabIndex,\n    MatFormFieldControl<any>, CanUpdateErrorState, CanDisableRipple {\n  private _scrollStrategyFactory: () => ScrollStrategy;\n\n  /** Whether or not the overlay panel is open. */\n  private _panelOpen = false;\n\n  /** Whether filling out the select is required in the form. */\n  private _required: boolean = false;\n\n  /** The scroll position of the overlay panel, calculated to center the selected option. */\n  private _scrollTop = 0;\n\n  /** The placeholder displayed in the trigger of the select. */\n  private _placeholder: string;\n\n  /** Whether the component is in multiple selection mode. */\n  private _multiple: boolean = false;\n\n  /** Comparison function to specify which option is displayed. Defaults to object equality. */\n  private _compareWith = (o1: any, o2: any) => o1 === o2;\n\n  /** Unique id for this input. */\n  private _uid = `mat-select-${nextUniqueId++}`;\n\n  /** Current `ariar-labelledby` value for the select trigger. */\n  private _triggerAriaLabelledBy: string | null = null;\n\n  /** Emits whenever the component is destroyed. */\n  private readonly _destroy = new Subject<void>();\n\n  /** The last measured value for the trigger's client bounding rect. */\n  _triggerRect: ClientRect;\n\n  /** The aria-describedby attribute on the select for improved a11y. */\n  _ariaDescribedby: string;\n\n  /** The cached font-size of the trigger element. */\n  _triggerFontSize = 0;\n\n  /** Deals with the selection logic. */\n  _selectionModel: SelectionModel<MatOption>;\n\n  /** Manages keyboard events for options in the panel. */\n  _keyManager: ActiveDescendantKeyManager<MatOption>;\n\n  /** `View -> model callback called when value changes` */\n  _onChange: (value: any) => void = () => {};\n\n  /** `View -> model callback called when select has been touched` */\n  _onTouched = () => {};\n\n  _valueId = `mat-select-value-${nextUniqueId++}`;\n\n  /** The value of the select panel's transform-origin property. */\n  _transformOrigin: string = 'top';\n\n  /** Emits when the panel element is finished transforming in. */\n  _panelDoneAnimatingStream = new Subject<string>();\n\n  /** Strategy that will be used to handle scrolling while the select panel is open. */\n  _scrollStrategy: ScrollStrategy;\n\n  /**\n   * The y-offset of the overlay panel in relation to the trigger's top start corner.\n   * This must be adjusted to align the selected option text over the trigger text.\n   * when the panel opens. Will change based on the y-position of the selected option.\n   */\n  _offsetY = 0;\n\n  /**\n   * This position config ensures that the top \"start\" corner of the overlay\n   * is aligned with with the top \"start\" of the origin by default (overlapping\n   * the trigger completely). If the panel cannot fit below the trigger, it\n   * will fall back to a position above the trigger.\n   */\n  _positions: ConnectedPosition[] = [\n    {\n      originX: 'start',\n      originY: 'top',\n      overlayX: 'start',\n      overlayY: 'top',\n    },\n    {\n      originX: 'start',\n      originY: 'bottom',\n      overlayX: 'start',\n      overlayY: 'bottom',\n    },\n  ];\n\n  /** Whether the component is disabling centering of the active option over the trigger. */\n  private _disableOptionCentering: boolean = false;\n\n  /** Whether the select is focused. */\n  get focused(): boolean {\n    return this._focused || this._panelOpen;\n  }\n  private _focused = false;\n\n  /** A name for this control that can be used by `mat-form-field`. */\n  controlType = 'mat-select';\n\n  /** Trigger that opens the select. */\n  @ViewChild('trigger') trigger: ElementRef;\n\n  /** Panel containing the select options. */\n  @ViewChild('panel') panel: ElementRef;\n\n  /**\n   * Overlay pane containing the options.\n   * @deprecated To be turned into a private API.\n   * @breaking-change 10.0.0\n   * @docs-private\n   */\n  @ViewChild(CdkConnectedOverlay) overlayDir: CdkConnectedOverlay;\n\n  /** All of the defined select options. */\n  @ContentChildren(MatOption, {descendants: true}) options: QueryList<MatOption>;\n\n  /** All of the defined groups of options. */\n  @ContentChildren(MAT_OPTGROUP, {descendants: true}) optionGroups: QueryList<MatOptgroup>;\n\n  /** Classes to be passed to the select panel. Supports the same syntax as `ngClass`. */\n  @Input() panelClass: string|string[]|Set<string>|{[key: string]: any};\n\n  /** User-supplied override of the trigger element. */\n  @ContentChild(MAT_SELECT_TRIGGER) customTrigger: MatSelectTrigger;\n\n  /** Placeholder to be shown if no value has been selected. */\n  @Input()\n  get placeholder(): string { return this._placeholder; }\n  set placeholder(value: string) {\n    this._placeholder = value;\n    this.stateChanges.next();\n  }\n\n  /** Whether the component is required. */\n  @Input()\n  get required(): boolean { return this._required; }\n  set required(value: boolean) {\n    this._required = coerceBooleanProperty(value);\n    this.stateChanges.next();\n  }\n\n  /** Whether the user should be allowed to select multiple options. */\n  @Input()\n  get multiple(): boolean { return this._multiple; }\n  set multiple(value: boolean) {\n    if (this._selectionModel && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw getMatSelectDynamicMultipleError();\n    }\n\n    this._multiple = coerceBooleanProperty(value);\n  }\n\n  /** Whether to center the active option over the trigger. */\n  @Input()\n  get disableOptionCentering(): boolean { return this._disableOptionCentering; }\n  set disableOptionCentering(value: boolean) {\n    this._disableOptionCentering = coerceBooleanProperty(value);\n  }\n\n  /**\n   * Function to compare the option values with the selected values. The first argument\n   * is a value from an option. The second is a value from the selection. A boolean\n   * should be returned.\n   */\n  @Input()\n  get compareWith() { return this._compareWith; }\n  set compareWith(fn: (o1: any, o2: any) => boolean) {\n    if (typeof fn !== 'function' && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw getMatSelectNonFunctionValueError();\n    }\n    this._compareWith = fn;\n    if (this._selectionModel) {\n      // A different comparator means the selection could change.\n      this._initializeSelection();\n    }\n  }\n\n  /** Value of the select control. */\n  @Input()\n  get value(): any { return this._value; }\n  set value(newValue: any) {\n    if (newValue !== this._value) {\n      if (this.options) {\n        this._setSelectionByValue(newValue);\n      }\n\n      this._value = newValue;\n    }\n  }\n  private _value: any;\n\n  /** Aria label of the select. If not specified, the placeholder will be used as label. */\n  @Input('aria-label') ariaLabel: string = '';\n\n  /** Input that can be used to specify the `aria-labelledby` attribute. */\n  @Input('aria-labelledby') ariaLabelledby: string;\n\n  /** Object used to control when error messages are shown. */\n  @Input() errorStateMatcher: ErrorStateMatcher;\n\n  /** Time to wait in milliseconds after the last keystroke before moving focus to an item. */\n  @Input()\n  get typeaheadDebounceInterval(): number { return this._typeaheadDebounceInterval; }\n  set typeaheadDebounceInterval(value: number) {\n    this._typeaheadDebounceInterval = coerceNumberProperty(value);\n  }\n  private _typeaheadDebounceInterval: number;\n\n  /**\n   * Function used to sort the values in a select in multiple mode.\n   * Follows the same logic as `Array.prototype.sort`.\n   */\n  @Input() sortComparator: (a: MatOption, b: MatOption, options: MatOption[]) => number;\n\n  /** Unique id of the element. */\n  @Input()\n  get id(): string { return this._id; }\n  set id(value: string) {\n    this._id = value || this._uid;\n    this.stateChanges.next();\n  }\n  private _id: string;\n\n  /** Combined stream of all of the child options' change events. */\n  readonly optionSelectionChanges: Observable<MatOptionSelectionChange> = defer(() => {\n    const options = this.options;\n\n    if (options) {\n      return options.changes.pipe(\n        startWith(options),\n        switchMap(() => merge(...options.map(option => option.onSelectionChange)))\n      );\n    }\n\n    return this._ngZone.onStable\n      .pipe(take(1), switchMap(() => this.optionSelectionChanges));\n  }) as Observable<MatOptionSelectionChange>;\n\n  /** Event emitted when the select panel has been toggled. */\n  @Output() readonly openedChange: EventEmitter<boolean> = new EventEmitter<boolean>();\n\n  /** Event emitted when the select has been opened. */\n  @Output('opened') readonly _openedStream: Observable<void> =\n      this.openedChange.pipe(filter(o => o), map(() => {}));\n\n  /** Event emitted when the select has been closed. */\n  @Output('closed') readonly _closedStream: Observable<void> =\n      this.openedChange.pipe(filter(o => !o), map(() => {}));\n\n   /** Event emitted when the selected value has been changed by the user. */\n  @Output() readonly selectionChange: EventEmitter<MatSelectChange> =\n      new EventEmitter<MatSelectChange>();\n\n  /**\n   * Event that emits whenever the raw value of the select changes. This is here primarily\n   * to facilitate the two-way binding for the `value` input.\n   * @docs-private\n   */\n  @Output() readonly valueChange: EventEmitter<any> = new EventEmitter<any>();\n\n  constructor(\n    private _viewportRuler: ViewportRuler,\n    private _changeDetectorRef: ChangeDetectorRef,\n    private _ngZone: NgZone,\n    _defaultErrorStateMatcher: ErrorStateMatcher,\n    elementRef: ElementRef,\n    @Optional() private _dir: Directionality,\n    @Optional() _parentForm: NgForm,\n    @Optional() _parentFormGroup: FormGroupDirective,\n    @Optional() @Inject(MAT_FORM_FIELD) private _parentFormField: MatFormField,\n    @Self() @Optional() public ngControl: NgControl,\n    @Attribute('tabindex') tabIndex: string,\n    @Inject(MAT_SELECT_SCROLL_STRATEGY) scrollStrategyFactory: any,\n    private _liveAnnouncer: LiveAnnouncer,\n    @Optional() @Inject(MAT_SELECT_CONFIG) defaults?: MatSelectConfig) {\n    super(elementRef, _defaultErrorStateMatcher, _parentForm,\n          _parentFormGroup, ngControl);\n\n    if (this.ngControl) {\n      // Note: we provide the value accessor through here, instead of\n      // the `providers` to avoid running into a circular import.\n      this.ngControl.valueAccessor = this;\n    }\n\n    this._scrollStrategyFactory = scrollStrategyFactory;\n    this._scrollStrategy = this._scrollStrategyFactory();\n    this.tabIndex = parseInt(tabIndex) || 0;\n\n    // Force setter to be called in case id was not specified.\n    this.id = this.id;\n\n    if (defaults) {\n      if (defaults.disableOptionCentering != null) {\n        this.disableOptionCentering = defaults.disableOptionCentering;\n      }\n\n      if (defaults.typeaheadDebounceInterval != null) {\n        this.typeaheadDebounceInterval = defaults.typeaheadDebounceInterval;\n      }\n    }\n  }\n\n  ngOnInit() {\n    this._selectionModel = new SelectionModel<MatOption>(this.multiple);\n    this.stateChanges.next();\n\n    // We need `distinctUntilChanged` here, because some browsers will\n    // fire the animation end event twice for the same animation. See:\n    // https://github.com/angular/angular/issues/24084\n    this._panelDoneAnimatingStream\n      .pipe(distinctUntilChanged(), takeUntil(this._destroy))\n      .subscribe(() => {\n        if (this.panelOpen) {\n          this._scrollTop = 0;\n          this.openedChange.emit(true);\n        } else {\n          this.openedChange.emit(false);\n          this.overlayDir.offsetX = 0;\n          this._changeDetectorRef.markForCheck();\n        }\n      });\n\n    this._viewportRuler.change()\n      .pipe(takeUntil(this._destroy))\n      .subscribe(() => {\n        if (this._panelOpen) {\n          this._triggerRect = this.trigger.nativeElement.getBoundingClientRect();\n          this._changeDetectorRef.markForCheck();\n        }\n      });\n  }\n\n  ngAfterContentInit() {\n    this._initKeyManager();\n\n    this._selectionModel.changed.pipe(takeUntil(this._destroy)).subscribe(event => {\n      event.added.forEach(option => option.select());\n      event.removed.forEach(option => option.deselect());\n    });\n\n    this.options.changes.pipe(startWith(null), takeUntil(this._destroy)).subscribe(() => {\n      this._resetOptions();\n      this._initializeSelection();\n    });\n  }\n\n  ngDoCheck() {\n    const newAriaLabelledby = this._getTriggerAriaLabelledby();\n\n    // We have to manage setting the `aria-labelledby` ourselves, because part of its value\n    // is computed as a result of a content query which can cause this binding to trigger a\n    // \"changed after checked\" error.\n    if (newAriaLabelledby !== this._triggerAriaLabelledBy) {\n      const element: HTMLElement = this._elementRef.nativeElement;\n      this._triggerAriaLabelledBy = newAriaLabelledby;\n      if (newAriaLabelledby) {\n        element.setAttribute('aria-labelledby', newAriaLabelledby);\n      } else {\n        element.removeAttribute('aria-labelledby');\n      }\n    }\n\n    if (this.ngControl) {\n      this.updateErrorState();\n    }\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    // Updating the disabled state is handled by `mixinDisabled`, but we need to additionally let\n    // the parent form field know to run change detection when the disabled state changes.\n    if (changes['disabled']) {\n      this.stateChanges.next();\n    }\n\n    if (changes['typeaheadDebounceInterval'] && this._keyManager) {\n      this._keyManager.withTypeAhead(this._typeaheadDebounceInterval);\n    }\n  }\n\n  ngOnDestroy() {\n    this._destroy.next();\n    this._destroy.complete();\n    this.stateChanges.complete();\n  }\n\n  /** Toggles the overlay panel open or closed. */\n  toggle(): void {\n    this.panelOpen ? this.close() : this.open();\n  }\n\n  /** Opens the overlay panel. */\n  open(): void {\n    if (this.disabled || !this.options || !this.options.length || this._panelOpen) {\n      return;\n    }\n\n    this._triggerRect = this.trigger.nativeElement.getBoundingClientRect();\n    // Note: The computed font-size will be a string pixel value (e.g. \"16px\").\n    // `parseInt` ignores the trailing 'px' and converts this to a number.\n    this._triggerFontSize = parseInt(getComputedStyle(this.trigger.nativeElement).fontSize || '0');\n\n    this._panelOpen = true;\n    this._keyManager.withHorizontalOrientation(null);\n    this._calculateOverlayPosition();\n    this._highlightCorrectOption();\n    this._changeDetectorRef.markForCheck();\n\n    // Set the font size on the panel element once it exists.\n    this._ngZone.onStable.pipe(take(1)).subscribe(() => {\n      if (this._triggerFontSize && this.overlayDir.overlayRef &&\n          this.overlayDir.overlayRef.overlayElement) {\n        this.overlayDir.overlayRef.overlayElement.style.fontSize = `${this._triggerFontSize}px`;\n      }\n    });\n  }\n\n  /** Closes the overlay panel and focuses the host element. */\n  close(): void {\n    if (this._panelOpen) {\n      this._panelOpen = false;\n      this._keyManager.withHorizontalOrientation(this._isRtl() ? 'rtl' : 'ltr');\n      this._changeDetectorRef.markForCheck();\n      this._onTouched();\n    }\n  }\n\n  /**\n   * Sets the select's value. Part of the ControlValueAccessor interface\n   * required to integrate with Angular's core forms API.\n   *\n   * @param value New value to be written to the model.\n   */\n  writeValue(value: any): void {\n    this.value = value;\n  }\n\n  /**\n   * Saves a callback function to be invoked when the select's value\n   * changes from user input. Part of the ControlValueAccessor interface\n   * required to integrate with Angular's core forms API.\n   *\n   * @param fn Callback to be triggered when the value changes.\n   */\n  registerOnChange(fn: (value: any) => void): void {\n    this._onChange = fn;\n  }\n\n  /**\n   * Saves a callback function to be invoked when the select is blurred\n   * by the user. Part of the ControlValueAccessor interface required\n   * to integrate with Angular's core forms API.\n   *\n   * @param fn Callback to be triggered when the component has been touched.\n   */\n  registerOnTouched(fn: () => {}): void {\n    this._onTouched = fn;\n  }\n\n  /**\n   * Disables the select. Part of the ControlValueAccessor interface required\n   * to integrate with Angular's core forms API.\n   *\n   * @param isDisabled Sets whether the component is disabled.\n   */\n  setDisabledState(isDisabled: boolean): void {\n    this.disabled = isDisabled;\n    this._changeDetectorRef.markForCheck();\n    this.stateChanges.next();\n  }\n\n  /** Whether or not the overlay panel is open. */\n  get panelOpen(): boolean {\n    return this._panelOpen;\n  }\n\n  /** The currently selected option. */\n  get selected(): MatOption | MatOption[] {\n    return this.multiple ? this._selectionModel.selected : this._selectionModel.selected[0];\n  }\n\n  /** The value displayed in the trigger. */\n  get triggerValue(): string {\n    if (this.empty) {\n      return '';\n    }\n\n    if (this._multiple) {\n      const selectedOptions = this._selectionModel.selected.map(option => option.viewValue);\n\n      if (this._isRtl()) {\n        selectedOptions.reverse();\n      }\n\n      // TODO(crisbeto): delimiter should be configurable for proper localization.\n      return selectedOptions.join(', ');\n    }\n\n    return this._selectionModel.selected[0].viewValue;\n  }\n\n  /** Whether the element is in RTL mode. */\n  _isRtl(): boolean {\n    return this._dir ? this._dir.value === 'rtl' : false;\n  }\n\n  /** Handles all keydown events on the select. */\n  _handleKeydown(event: KeyboardEvent): void {\n    if (!this.disabled) {\n      this.panelOpen ? this._handleOpenKeydown(event) : this._handleClosedKeydown(event);\n    }\n  }\n\n  /** Handles keyboard events while the select is closed. */\n  private _handleClosedKeydown(event: KeyboardEvent): void {\n    const keyCode = event.keyCode;\n    const isArrowKey = keyCode === DOWN_ARROW || keyCode === UP_ARROW ||\n                       keyCode === LEFT_ARROW || keyCode === RIGHT_ARROW;\n    const isOpenKey = keyCode === ENTER || keyCode === SPACE;\n    const manager = this._keyManager;\n\n    // Open the select on ALT + arrow key to match the native <select>\n    if (!manager.isTyping() && (isOpenKey && !hasModifierKey(event)) ||\n      ((this.multiple || event.altKey) && isArrowKey)) {\n      event.preventDefault(); // prevents the page from scrolling down when pressing space\n      this.open();\n    } else if (!this.multiple) {\n      const previouslySelectedOption = this.selected;\n      manager.onKeydown(event);\n      const selectedOption = this.selected;\n\n      // Since the value has changed, we need to announce it ourselves.\n      if (selectedOption && previouslySelectedOption !== selectedOption) {\n        // We set a duration on the live announcement, because we want the live element to be\n        // cleared after a while so that users can't navigate to it using the arrow keys.\n        this._liveAnnouncer.announce((selectedOption as MatOption).viewValue, 10000);\n      }\n    }\n  }\n\n  /** Handles keyboard events when the selected is open. */\n  private _handleOpenKeydown(event: KeyboardEvent): void {\n    const manager = this._keyManager;\n    const keyCode = event.keyCode;\n    const isArrowKey = keyCode === DOWN_ARROW || keyCode === UP_ARROW;\n    const isTyping = manager.isTyping();\n\n    if (isArrowKey && event.altKey) {\n      // Close the select on ALT + arrow key to match the native <select>\n      event.preventDefault();\n      this.close();\n      // Don't do anything in this case if the user is typing,\n      // because the typing sequence can include the space key.\n    } else if (!isTyping && (keyCode === ENTER || keyCode === SPACE) && manager.activeItem &&\n      !hasModifierKey(event)) {\n      event.preventDefault();\n      manager.activeItem._selectViaInteraction();\n    } else if (!isTyping && this._multiple && keyCode === A && event.ctrlKey) {\n      event.preventDefault();\n      const hasDeselectedOptions = this.options.some(opt => !opt.disabled && !opt.selected);\n\n      this.options.forEach(option => {\n        if (!option.disabled) {\n          hasDeselectedOptions ? option.select() : option.deselect();\n        }\n      });\n    } else {\n      const previouslyFocusedIndex = manager.activeItemIndex;\n\n      manager.onKeydown(event);\n\n      if (this._multiple && isArrowKey && event.shiftKey && manager.activeItem &&\n          manager.activeItemIndex !== previouslyFocusedIndex) {\n        manager.activeItem._selectViaInteraction();\n      }\n    }\n  }\n\n  _onFocus() {\n    if (!this.disabled) {\n      this._focused = true;\n      this.stateChanges.next();\n    }\n  }\n\n  /**\n   * Calls the touched callback only if the panel is closed. Otherwise, the trigger will\n   * \"blur\" to the panel when it opens, causing a false positive.\n   */\n  _onBlur() {\n    this._focused = false;\n\n    if (!this.disabled && !this.panelOpen) {\n      this._onTouched();\n      this._changeDetectorRef.markForCheck();\n      this.stateChanges.next();\n    }\n  }\n\n  /**\n   * Callback that is invoked when the overlay panel has been attached.\n   */\n  _onAttached(): void {\n    this.overlayDir.positionChange.pipe(take(1)).subscribe(() => {\n      this._changeDetectorRef.detectChanges();\n      this._calculateOverlayOffsetX();\n      this.panel.nativeElement.scrollTop = this._scrollTop;\n    });\n  }\n\n  /** Returns the theme to be used on the panel. */\n  _getPanelTheme(): string {\n    return this._parentFormField ? `mat-${this._parentFormField.color}` : '';\n  }\n\n  /** Whether the select has a value. */\n  get empty(): boolean {\n    return !this._selectionModel || this._selectionModel.isEmpty();\n  }\n\n  private _initializeSelection(): void {\n    // Defer setting the value in order to avoid the \"Expression\n    // has changed after it was checked\" errors from Angular.\n    Promise.resolve().then(() => {\n      this._setSelectionByValue(this.ngControl ? this.ngControl.value : this._value);\n      this.stateChanges.next();\n    });\n  }\n\n  /**\n   * Sets the selected option based on a value. If no option can be\n   * found with the designated value, the select trigger is cleared.\n   */\n  private _setSelectionByValue(value: any | any[]): void {\n    if (this.multiple && value) {\n      if (!Array.isArray(value) && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n        throw getMatSelectNonArrayValueError();\n      }\n\n      this._selectionModel.clear();\n      value.forEach((currentValue: any) => this._selectValue(currentValue));\n      this._sortValues();\n    } else {\n      this._selectionModel.clear();\n      const correspondingOption = this._selectValue(value);\n\n      // Shift focus to the active item. Note that we shouldn't do this in multiple\n      // mode, because we don't know what option the user interacted with last.\n      if (correspondingOption) {\n        this._keyManager.updateActiveItem(correspondingOption);\n      } else if (!this.panelOpen) {\n        // Otherwise reset the highlighted option. Note that we only want to do this while\n        // closed, because doing it while open can shift the user's focus unnecessarily.\n        this._keyManager.updateActiveItem(-1);\n      }\n    }\n\n    this._changeDetectorRef.markForCheck();\n  }\n\n  /**\n   * Finds and selects and option based on its value.\n   * @returns Option that has the corresponding value.\n   */\n  private _selectValue(value: any): MatOption | undefined {\n    const correspondingOption = this.options.find((option: MatOption) => {\n      try {\n        // Treat null as a special reset value.\n        return option.value != null && this._compareWith(option.value,  value);\n      } catch (error) {\n        if (typeof ngDevMode === 'undefined' || ngDevMode) {\n          // Notify developers of errors in their comparator.\n          console.warn(error);\n        }\n        return false;\n      }\n    });\n\n    if (correspondingOption) {\n      this._selectionModel.select(correspondingOption);\n    }\n\n    return correspondingOption;\n  }\n\n  /** Sets up a key manager to listen to keyboard events on the overlay panel. */\n  private _initKeyManager() {\n    this._keyManager = new ActiveDescendantKeyManager<MatOption>(this.options)\n      .withTypeAhead(this._typeaheadDebounceInterval)\n      .withVerticalOrientation()\n      .withHorizontalOrientation(this._isRtl() ? 'rtl' : 'ltr')\n      .withHomeAndEnd()\n      .withAllowedModifierKeys(['shiftKey']);\n\n    this._keyManager.tabOut.pipe(takeUntil(this._destroy)).subscribe(() => {\n      if (this.panelOpen) {\n        // Select the active item when tabbing away. This is consistent with how the native\n        // select behaves. Note that we only want to do this in single selection mode.\n        if (!this.multiple && this._keyManager.activeItem) {\n          this._keyManager.activeItem._selectViaInteraction();\n        }\n\n        // Restore focus to the trigger before closing. Ensures that the focus\n        // position won't be lost if the user got focus into the overlay.\n        this.focus();\n        this.close();\n      }\n    });\n\n    this._keyManager.change.pipe(takeUntil(this._destroy)).subscribe(() => {\n      if (this._panelOpen && this.panel) {\n        this._scrollActiveOptionIntoView();\n      } else if (!this._panelOpen && !this.multiple && this._keyManager.activeItem) {\n        this._keyManager.activeItem._selectViaInteraction();\n      }\n    });\n  }\n\n  /** Drops current option subscriptions and IDs and resets from scratch. */\n  private _resetOptions(): void {\n    const changedOrDestroyed = merge(this.options.changes, this._destroy);\n\n    this.optionSelectionChanges.pipe(takeUntil(changedOrDestroyed)).subscribe(event => {\n      this._onSelect(event.source, event.isUserInput);\n\n      if (event.isUserInput && !this.multiple && this._panelOpen) {\n        this.close();\n        this.focus();\n      }\n    });\n\n    // Listen to changes in the internal state of the options and react accordingly.\n    // Handles cases like the labels of the selected options changing.\n    merge(...this.options.map(option => option._stateChanges))\n      .pipe(takeUntil(changedOrDestroyed))\n      .subscribe(() => {\n        this._changeDetectorRef.markForCheck();\n        this.stateChanges.next();\n      });\n  }\n\n  /** Invoked when an option is clicked. */\n  private _onSelect(option: MatOption, isUserInput: boolean): void {\n    const wasSelected = this._selectionModel.isSelected(option);\n\n    if (option.value == null && !this._multiple) {\n      option.deselect();\n      this._selectionModel.clear();\n\n      if (this.value != null) {\n        this._propagateChanges(option.value);\n      }\n    } else {\n      if (wasSelected !== option.selected) {\n        option.selected ? this._selectionModel.select(option) :\n                          this._selectionModel.deselect(option);\n      }\n\n      if (isUserInput) {\n        this._keyManager.setActiveItem(option);\n      }\n\n      if (this.multiple) {\n        this._sortValues();\n\n        if (isUserInput) {\n          // In case the user selected the option with their mouse, we\n          // want to restore focus back to the trigger, in order to\n          // prevent the select keyboard controls from clashing with\n          // the ones from `mat-option`.\n          this.focus();\n        }\n      }\n    }\n\n    if (wasSelected !== this._selectionModel.isSelected(option)) {\n      this._propagateChanges();\n    }\n\n    this.stateChanges.next();\n  }\n\n  /** Sorts the selected values in the selected based on their order in the panel. */\n  private _sortValues() {\n    if (this.multiple) {\n      const options = this.options.toArray();\n\n      this._selectionModel.sort((a, b) => {\n        return this.sortComparator ? this.sortComparator(a, b, options) :\n                                     options.indexOf(a) - options.indexOf(b);\n      });\n      this.stateChanges.next();\n    }\n  }\n\n  /** Emits change event to set the model value. */\n  private _propagateChanges(fallbackValue?: any): void {\n    let valueToEmit: any = null;\n\n    if (this.multiple) {\n      valueToEmit = (this.selected as MatOption[]).map(option => option.value);\n    } else {\n      valueToEmit = this.selected ? (this.selected as MatOption).value : fallbackValue;\n    }\n\n    this._value = valueToEmit;\n    this.valueChange.emit(valueToEmit);\n    this._onChange(valueToEmit);\n    this.selectionChange.emit(new MatSelectChange(this, valueToEmit));\n    this._changeDetectorRef.markForCheck();\n  }\n\n  /**\n   * Highlights the selected item. If no option is selected, it will highlight\n   * the first item instead.\n   */\n  private _highlightCorrectOption(): void {\n    if (this._keyManager) {\n      if (this.empty) {\n        this._keyManager.setFirstItemActive();\n      } else {\n        this._keyManager.setActiveItem(this._selectionModel.selected[0]);\n      }\n    }\n  }\n\n  /** Scrolls the active option into view. */\n  private _scrollActiveOptionIntoView(): void {\n    const activeOptionIndex = this._keyManager.activeItemIndex || 0;\n    const labelCount = _countGroupLabelsBeforeOption(activeOptionIndex, this.options,\n        this.optionGroups);\n    const itemHeight = this._getItemHeight();\n\n    this.panel.nativeElement.scrollTop = _getOptionScrollPosition(\n      (activeOptionIndex + labelCount) * itemHeight,\n      itemHeight,\n      this.panel.nativeElement.scrollTop,\n      SELECT_PANEL_MAX_HEIGHT\n    );\n  }\n\n  /** Focuses the select element. */\n  focus(options?: FocusOptions): void {\n    this._elementRef.nativeElement.focus(options);\n  }\n\n  /** Gets the index of the provided option in the option list. */\n  private _getOptionIndex(option: MatOption): number | undefined {\n    return this.options.reduce((result: number | undefined, current: MatOption, index: number) => {\n      if (result !== undefined) {\n        return result;\n      }\n\n      return option === current ? index : undefined;\n    }, undefined);\n  }\n\n  /** Calculates the scroll position and x- and y-offsets of the overlay panel. */\n  private _calculateOverlayPosition(): void {\n    const itemHeight = this._getItemHeight();\n    const items = this._getItemCount();\n    const panelHeight = Math.min(items * itemHeight, SELECT_PANEL_MAX_HEIGHT);\n    const scrollContainerHeight = items * itemHeight;\n\n    // The farthest the panel can be scrolled before it hits the bottom\n    const maxScroll = scrollContainerHeight - panelHeight;\n\n    // If no value is selected we open the popup to the first item.\n    let selectedOptionOffset =\n        this.empty ? 0 : this._getOptionIndex(this._selectionModel.selected[0])!;\n\n    selectedOptionOffset += _countGroupLabelsBeforeOption(selectedOptionOffset, this.options,\n        this.optionGroups);\n\n    // We must maintain a scroll buffer so the selected option will be scrolled to the\n    // center of the overlay panel rather than the top.\n    const scrollBuffer = panelHeight / 2;\n    this._scrollTop = this._calculateOverlayScroll(selectedOptionOffset, scrollBuffer, maxScroll);\n    this._offsetY = this._calculateOverlayOffsetY(selectedOptionOffset, scrollBuffer, maxScroll);\n\n    this._checkOverlayWithinViewport(maxScroll);\n  }\n\n  /**\n   * Calculates the scroll position of the select's overlay panel.\n   *\n   * Attempts to center the selected option in the panel. If the option is\n   * too high or too low in the panel to be scrolled to the center, it clamps the\n   * scroll position to the min or max scroll positions respectively.\n   */\n  _calculateOverlayScroll(selectedIndex: number, scrollBuffer: number,\n                          maxScroll: number): number {\n    const itemHeight = this._getItemHeight();\n    const optionOffsetFromScrollTop = itemHeight * selectedIndex;\n    const halfOptionHeight = itemHeight / 2;\n\n    // Starts at the optionOffsetFromScrollTop, which scrolls the option to the top of the\n    // scroll container, then subtracts the scroll buffer to scroll the option down to\n    // the center of the overlay panel. Half the option height must be re-added to the\n    // scrollTop so the option is centered based on its middle, not its top edge.\n    const optimalScrollPosition = optionOffsetFromScrollTop - scrollBuffer + halfOptionHeight;\n    return Math.min(Math.max(0, optimalScrollPosition), maxScroll);\n  }\n\n  /** Gets the aria-labelledby for the select panel. */\n  _getPanelAriaLabelledby(): string | null {\n    if (this.ariaLabel) {\n      return null;\n    }\n\n    const labelId = this._getLabelId();\n    return this.ariaLabelledby ? labelId + ' ' + this.ariaLabelledby : labelId;\n  }\n\n  /** Determines the `aria-activedescendant` to be set on the host. */\n  _getAriaActiveDescendant(): string | null {\n    if (this.panelOpen && this._keyManager && this._keyManager.activeItem) {\n      return this._keyManager.activeItem.id;\n    }\n\n    return null;\n  }\n\n  /** Gets the ID of the element that is labelling the select. */\n  private _getLabelId(): string {\n    return this._parentFormField?.getLabelId() || '';\n  }\n\n  /**\n   * Sets the x-offset of the overlay panel in relation to the trigger's top start corner.\n   * This must be adjusted to align the selected option text over the trigger text when\n   * the panel opens. Will change based on LTR or RTL text direction. Note that the offset\n   * can't be calculated until the panel has been attached, because we need to know the\n   * content width in order to constrain the panel within the viewport.\n   */\n  private _calculateOverlayOffsetX(): void {\n    const overlayRect = this.overlayDir.overlayRef.overlayElement.getBoundingClientRect();\n    const viewportSize = this._viewportRuler.getViewportSize();\n    const isRtl = this._isRtl();\n    const paddingWidth = this.multiple ? SELECT_MULTIPLE_PANEL_PADDING_X + SELECT_PANEL_PADDING_X :\n                                         SELECT_PANEL_PADDING_X * 2;\n    let offsetX: number;\n\n    // Adjust the offset, depending on the option padding.\n    if (this.multiple) {\n      offsetX = SELECT_MULTIPLE_PANEL_PADDING_X;\n    } else {\n      let selected = this._selectionModel.selected[0] || this.options.first;\n      offsetX = selected && selected.group ? SELECT_PANEL_INDENT_PADDING_X : SELECT_PANEL_PADDING_X;\n    }\n\n    // Invert the offset in LTR.\n    if (!isRtl) {\n      offsetX *= -1;\n    }\n\n    // Determine how much the select overflows on each side.\n    const leftOverflow = 0 - (overlayRect.left + offsetX - (isRtl ? paddingWidth : 0));\n    const rightOverflow = overlayRect.right + offsetX - viewportSize.width\n                          + (isRtl ? 0 : paddingWidth);\n\n    // If the element overflows on either side, reduce the offset to allow it to fit.\n    if (leftOverflow > 0) {\n      offsetX += leftOverflow + SELECT_PANEL_VIEWPORT_PADDING;\n    } else if (rightOverflow > 0) {\n      offsetX -= rightOverflow + SELECT_PANEL_VIEWPORT_PADDING;\n    }\n\n    // Set the offset directly in order to avoid having to go through change detection and\n    // potentially triggering \"changed after it was checked\" errors. Round the value to avoid\n    // blurry content in some browsers.\n    this.overlayDir.offsetX = Math.round(offsetX);\n    this.overlayDir.overlayRef.updatePosition();\n  }\n\n  /**\n   * Calculates the y-offset of the select's overlay panel in relation to the\n   * top start corner of the trigger. It has to be adjusted in order for the\n   * selected option to be aligned over the trigger when the panel opens.\n   */\n  private _calculateOverlayOffsetY(selectedIndex: number, scrollBuffer: number,\n                                  maxScroll: number): number {\n    const itemHeight = this._getItemHeight();\n    const optionHeightAdjustment = (itemHeight - this._triggerRect.height) / 2;\n    const maxOptionsDisplayed = Math.floor(SELECT_PANEL_MAX_HEIGHT / itemHeight);\n    let optionOffsetFromPanelTop: number;\n\n    // Disable offset if requested by user by returning 0 as value to offset\n    if (this._disableOptionCentering) {\n      return 0;\n    }\n\n    if (this._scrollTop === 0) {\n      optionOffsetFromPanelTop = selectedIndex * itemHeight;\n    } else if (this._scrollTop === maxScroll) {\n      const firstDisplayedIndex = this._getItemCount() - maxOptionsDisplayed;\n      const selectedDisplayIndex = selectedIndex - firstDisplayedIndex;\n\n      // The first item is partially out of the viewport. Therefore we need to calculate what\n      // portion of it is shown in the viewport and account for it in our offset.\n      let partialItemHeight =\n          itemHeight - (this._getItemCount() * itemHeight - SELECT_PANEL_MAX_HEIGHT) % itemHeight;\n\n      // Because the panel height is longer than the height of the options alone,\n      // there is always extra padding at the top or bottom of the panel. When\n      // scrolled to the very bottom, this padding is at the top of the panel and\n      // must be added to the offset.\n      optionOffsetFromPanelTop = selectedDisplayIndex * itemHeight + partialItemHeight;\n    } else {\n      // If the option was scrolled to the middle of the panel using a scroll buffer,\n      // its offset will be the scroll buffer minus the half height that was added to\n      // center it.\n      optionOffsetFromPanelTop = scrollBuffer - itemHeight / 2;\n    }\n\n    // The final offset is the option's offset from the top, adjusted for the height difference,\n    // multiplied by -1 to ensure that the overlay moves in the correct direction up the page.\n    // The value is rounded to prevent some browsers from blurring the content.\n    return Math.round(optionOffsetFromPanelTop * -1 - optionHeightAdjustment);\n  }\n\n  /**\n   * Checks that the attempted overlay position will fit within the viewport.\n   * If it will not fit, tries to adjust the scroll position and the associated\n   * y-offset so the panel can open fully on-screen. If it still won't fit,\n   * sets the offset back to 0 to allow the fallback position to take over.\n   */\n  private _checkOverlayWithinViewport(maxScroll: number): void {\n    const itemHeight = this._getItemHeight();\n    const viewportSize = this._viewportRuler.getViewportSize();\n\n    const topSpaceAvailable = this._triggerRect.top - SELECT_PANEL_VIEWPORT_PADDING;\n    const bottomSpaceAvailable =\n        viewportSize.height - this._triggerRect.bottom - SELECT_PANEL_VIEWPORT_PADDING;\n\n    const panelHeightTop = Math.abs(this._offsetY);\n    const totalPanelHeight =\n        Math.min(this._getItemCount() * itemHeight, SELECT_PANEL_MAX_HEIGHT);\n    const panelHeightBottom = totalPanelHeight - panelHeightTop - this._triggerRect.height;\n\n    if (panelHeightBottom > bottomSpaceAvailable) {\n      this._adjustPanelUp(panelHeightBottom, bottomSpaceAvailable);\n    } else if (panelHeightTop > topSpaceAvailable) {\n     this._adjustPanelDown(panelHeightTop, topSpaceAvailable, maxScroll);\n    } else {\n      this._transformOrigin = this._getOriginBasedOnOption();\n    }\n  }\n\n  /** Adjusts the overlay panel up to fit in the viewport. */\n  private _adjustPanelUp(panelHeightBottom: number, bottomSpaceAvailable: number) {\n    // Browsers ignore fractional scroll offsets, so we need to round.\n    const distanceBelowViewport = Math.round(panelHeightBottom - bottomSpaceAvailable);\n\n    // Scrolls the panel up by the distance it was extending past the boundary, then\n    // adjusts the offset by that amount to move the panel up into the viewport.\n    this._scrollTop -= distanceBelowViewport;\n    this._offsetY -= distanceBelowViewport;\n    this._transformOrigin = this._getOriginBasedOnOption();\n\n    // If the panel is scrolled to the very top, it won't be able to fit the panel\n    // by scrolling, so set the offset to 0 to allow the fallback position to take\n    // effect.\n    if (this._scrollTop <= 0) {\n      this._scrollTop = 0;\n      this._offsetY = 0;\n      this._transformOrigin = `50% bottom 0px`;\n    }\n  }\n\n  /** Adjusts the overlay panel down to fit in the viewport. */\n  private _adjustPanelDown(panelHeightTop: number, topSpaceAvailable: number,\n                           maxScroll: number) {\n    // Browsers ignore fractional scroll offsets, so we need to round.\n    const distanceAboveViewport = Math.round(panelHeightTop - topSpaceAvailable);\n\n    // Scrolls the panel down by the distance it was extending past the boundary, then\n    // adjusts the offset by that amount to move the panel down into the viewport.\n    this._scrollTop += distanceAboveViewport;\n    this._offsetY += distanceAboveViewport;\n    this._transformOrigin = this._getOriginBasedOnOption();\n\n    // If the panel is scrolled to the very bottom, it won't be able to fit the\n    // panel by scrolling, so set the offset to 0 to allow the fallback position\n    // to take effect.\n    if (this._scrollTop >= maxScroll) {\n      this._scrollTop = maxScroll;\n      this._offsetY = 0;\n      this._transformOrigin = `50% top 0px`;\n      return;\n    }\n  }\n\n  /** Sets the transform origin point based on the selected option. */\n  private _getOriginBasedOnOption(): string {\n    const itemHeight = this._getItemHeight();\n    const optionHeightAdjustment = (itemHeight - this._triggerRect.height) / 2;\n    const originY = Math.abs(this._offsetY) - optionHeightAdjustment + itemHeight / 2;\n    return `50% ${originY}px 0px`;\n  }\n\n  /** Calculates the amount of items in the select. This includes options and group labels. */\n  private _getItemCount(): number {\n    return this.options.length + this.optionGroups.length;\n  }\n\n  /** Calculates the height of the select's options. */\n  private _getItemHeight(): number {\n    return this._triggerFontSize * SELECT_ITEM_HEIGHT_EM;\n  }\n\n  /** Gets the aria-labelledby of the select component trigger. */\n  private _getTriggerAriaLabelledby(): string | null {\n    if (this.ariaLabel) {\n      return null;\n    }\n\n    let value = this._getLabelId() + ' ' + this._valueId;\n\n    if (this.ariaLabelledby) {\n      value += ' ' + this.ariaLabelledby;\n    }\n\n    return value;\n  }\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  setDescribedByIds(ids: string[]) {\n    this._ariaDescribedby = ids.join(' ');\n  }\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  onContainerClick() {\n    this.focus();\n    this.open();\n  }\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  get shouldLabelFloat(): boolean {\n    return this._panelOpen || !this.empty;\n  }\n\n  static ngAcceptInputType_required: BooleanInput;\n  static ngAcceptInputType_multiple: BooleanInput;\n  static ngAcceptInputType_disableOptionCentering: BooleanInput;\n  static ngAcceptInputType_typeaheadDebounceInterval: NumberInput;\n  static ngAcceptInputType_disabled: BooleanInput;\n  static ngAcceptInputType_disableRipple: BooleanInput;\n  static ngAcceptInputType_tabIndex: NumberInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {OverlayModule} from '@angular/cdk/overlay';\nimport {CommonModule} from '@angular/common';\nimport {NgModule} from '@angular/core';\nimport {MatCommonModule, MatOptionModule} from '@angular/material/core';\nimport {MatFormFieldModule} from '@angular/material/form-field';\nimport {CdkScrollableModule} from '@angular/cdk/scrolling';\nimport {MAT_SELECT_SCROLL_STRATEGY_PROVIDER, MatSelect, MatSelectTrigger} from './select';\n\n\n@NgModule({\n  imports: [\n    CommonModule,\n    OverlayModule,\n    MatOptionModule,\n    MatCommonModule,\n  ],\n  exports: [\n    CdkScrollableModule,\n    MatFormFieldModule,\n    MatSelect,\n    MatSelectTrigger,\n    MatOptionModule,\n    MatCommonModule\n  ],\n  declarations: [MatSelect, MatSelectTrigger],\n  providers: [MAT_SELECT_SCROLL_STRATEGY_PROVIDER]\n})\nexport class MatSelectModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './select-module';\nexport * from './select';\nexport * from './select-animations';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","export const errorObject = { e: {} };\n//# sourceMappingURL=errorObject.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Buffers the source Observable values until `closingNotifier` emits.\n *\n * <span class=\"informal\">Collects values from the past as an array, and emits\n * that array only when another Observable emits.</span>\n *\n * <img src=\"./img/buffer.png\" width=\"100%\">\n *\n * Buffers the incoming Observable values until the given `closingNotifier`\n * Observable emits a value, at which point it emits the buffer on the output\n * Observable and starts a new buffer internally, awaiting the next time\n * `closingNotifier` emits.\n *\n * @example <caption>On every click, emit array of most recent interval events</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var interval = Rx.Observable.interval(1000);\n * var buffered = interval.buffer(clicks);\n * buffered.subscribe(x => console.log(x));\n *\n * @see {@link bufferCount}\n * @see {@link bufferTime}\n * @see {@link bufferToggle}\n * @see {@link bufferWhen}\n * @see {@link window}\n *\n * @param {Observable<any>} closingNotifier An Observable that signals the\n * buffer to be emitted on the output Observable.\n * @return {Observable<T[]>} An Observable of buffers, which are arrays of\n * values.\n * @method buffer\n * @owner Observable\n */\nfunction buffer(closingNotifier) {\n    return operators_1.buffer(closingNotifier)(this);\n}\nexports.buffer = buffer;\n//# sourceMappingURL=buffer.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ViewContainerRef, InjectionToken} from '@angular/core';\nimport {AriaLivePoliteness} from '@angular/cdk/a11y';\nimport {Direction} from '@angular/cdk/bidi';\n\n/** Injection token that can be used to access the data that was passed in to a snack bar. */\nexport const MAT_SNACK_BAR_DATA = new InjectionToken<any>('MatSnackBarData');\n\n/** Possible values for horizontalPosition on MatSnackBarConfig. */\nexport type MatSnackBarHorizontalPosition = 'start' | 'center' | 'end' | 'left' | 'right';\n\n/** Possible values for verticalPosition on MatSnackBarConfig. */\nexport type MatSnackBarVerticalPosition = 'top' | 'bottom';\n\n/**\n * Configuration used when opening a snack-bar.\n */\nexport class MatSnackBarConfig<D = any> {\n  /** The politeness level for the MatAriaLiveAnnouncer announcement. */\n  politeness?: AriaLivePoliteness = 'assertive';\n\n  /**\n   * Message to be announced by the LiveAnnouncer. When opening a snackbar without a custom\n   * component or template, the announcement message will default to the specified message.\n   */\n  announcementMessage?: string = '';\n\n  /**\n   * The view container that serves as the parent for the snackbar for the purposes of dependency\n   * injection. Note: this does not affect where the snackbar is inserted in the DOM.\n   */\n  viewContainerRef?: ViewContainerRef;\n\n  /** The length of time in milliseconds to wait before automatically dismissing the snack bar. */\n  duration?: number = 0;\n\n  /** Extra CSS classes to be added to the snack bar container. */\n  panelClass?: string | string[];\n\n  /** Text layout direction for the snack bar. */\n  direction?: Direction;\n\n  /** Data being injected into the child component. */\n  data?: D | null = null;\n\n  /** The horizontal position to place the snack bar. */\n  horizontalPosition?: MatSnackBarHorizontalPosition = 'center';\n\n  /** The vertical position to place the snack bar. */\n  verticalPosition?: MatSnackBarVerticalPosition = 'bottom';\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {OverlayRef} from '@angular/cdk/overlay';\nimport {Observable, Subject} from 'rxjs';\nimport {_SnackBarContainer} from './snack-bar-container';\n\n\n/** Event that is emitted when a snack bar is dismissed. */\nexport interface MatSnackBarDismiss {\n  /** Whether the snack bar was dismissed using the action button. */\n  dismissedByAction: boolean;\n}\n\n/** Maximum amount of milliseconds that can be passed into setTimeout. */\nconst MAX_TIMEOUT = Math.pow(2, 31) - 1;\n\n/**\n * Reference to a snack bar dispatched from the snack bar service.\n */\nexport class MatSnackBarRef<T> {\n  /** The instance of the component making up the content of the snack bar. */\n  instance: T;\n\n  /**\n   * The instance of the component making up the content of the snack bar.\n   * @docs-private\n   */\n  containerInstance: _SnackBarContainer;\n\n  /** Subject for notifying the user that the snack bar has been dismissed. */\n  private readonly _afterDismissed = new Subject<MatSnackBarDismiss>();\n\n  /** Subject for notifying the user that the snack bar has opened and appeared. */\n  private readonly _afterOpened = new Subject<void>();\n\n  /** Subject for notifying the user that the snack bar action was called. */\n  private readonly _onAction = new Subject<void>();\n\n  /**\n   * Timeout ID for the duration setTimeout call. Used to clear the timeout if the snackbar is\n   * dismissed before the duration passes.\n   */\n  private _durationTimeoutId: number;\n\n  /** Whether the snack bar was dismissed using the action button. */\n  private _dismissedByAction = false;\n\n  constructor(containerInstance: _SnackBarContainer,\n              private _overlayRef: OverlayRef) {\n    this.containerInstance = containerInstance;\n    // Dismiss snackbar on action.\n    this.onAction().subscribe(() => this.dismiss());\n    containerInstance._onExit.subscribe(() => this._finishDismiss());\n  }\n\n  /** Dismisses the snack bar. */\n  dismiss(): void {\n    if (!this._afterDismissed.closed) {\n      this.containerInstance.exit();\n    }\n    clearTimeout(this._durationTimeoutId);\n  }\n\n  /** Marks the snackbar action clicked. */\n  dismissWithAction(): void {\n    if (!this._onAction.closed) {\n      this._dismissedByAction = true;\n      this._onAction.next();\n      this._onAction.complete();\n    }\n  }\n\n\n  /**\n   * Marks the snackbar action clicked.\n   * @deprecated Use `dismissWithAction` instead.\n   * @breaking-change 8.0.0\n   */\n  closeWithAction(): void {\n    this.dismissWithAction();\n  }\n\n  /** Dismisses the snack bar after some duration */\n  _dismissAfter(duration: number): void {\n    // Note that we need to cap the duration to the maximum value for setTimeout, because\n    // it'll revert to 1 if somebody passes in something greater (e.g. `Infinity`). See #17234.\n    this._durationTimeoutId = setTimeout(() => this.dismiss(), Math.min(duration, MAX_TIMEOUT));\n  }\n\n  /** Marks the snackbar as opened */\n  _open(): void {\n    if (!this._afterOpened.closed) {\n      this._afterOpened.next();\n      this._afterOpened.complete();\n    }\n  }\n\n  /** Cleans up the DOM after closing. */\n  private _finishDismiss(): void {\n    this._overlayRef.dispose();\n\n    if (!this._onAction.closed) {\n      this._onAction.complete();\n    }\n\n    this._afterDismissed.next({dismissedByAction: this._dismissedByAction});\n    this._afterDismissed.complete();\n    this._dismissedByAction = false;\n  }\n\n  /** Gets an observable that is notified when the snack bar is finished closing. */\n  afterDismissed(): Observable<MatSnackBarDismiss> {\n    return this._afterDismissed;\n  }\n\n  /** Gets an observable that is notified when the snack bar has opened and appeared. */\n  afterOpened(): Observable<void> {\n    return this.containerInstance._onEnter;\n  }\n\n  /** Gets an observable that is notified when the snack bar action is called. */\n  onAction(): Observable<void> {\n    return this._onAction;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ChangeDetectionStrategy, Component, Inject, ViewEncapsulation} from '@angular/core';\nimport {MAT_SNACK_BAR_DATA} from './snack-bar-config';\nimport {MatSnackBarRef} from './snack-bar-ref';\n\n\n/**\n * Interface for a simple snack bar component that has a message and a single action.\n */\nexport interface TextOnlySnackBar {\n  data: {message: string, action: string};\n  snackBarRef: MatSnackBarRef<TextOnlySnackBar>;\n  action: () => void;\n  hasAction: boolean;\n}\n\n/**\n * A component used to open as the default snack bar, matching material spec.\n * This should only be used internally by the snack bar service.\n */\n@Component({\n  selector: 'simple-snack-bar',\n  templateUrl: 'simple-snack-bar.html',\n  styleUrls: ['simple-snack-bar.css'],\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  host: {\n    'class': 'mat-simple-snackbar',\n  }\n})\nexport class SimpleSnackBar implements TextOnlySnackBar {\n  /** Data that was injected into the snack bar. */\n  data: {message: string, action: string};\n\n  constructor(\n    public snackBarRef: MatSnackBarRef<SimpleSnackBar>,\n    @Inject(MAT_SNACK_BAR_DATA) data: any) {\n    this.data = data;\n  }\n\n  /** Performs the action on the snack bar. */\n  action(): void {\n    this.snackBarRef.dismissWithAction();\n  }\n\n  /** If the action button should be shown. */\n  get hasAction(): boolean {\n    return !!this.data.action;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {\n  animate,\n  state,\n  style,\n  transition,\n  trigger,\n  AnimationTriggerMetadata,\n} from '@angular/animations';\n\n/**\n * Animations used by the Material snack bar.\n * @docs-private\n */\nexport const matSnackBarAnimations: {\n  readonly snackBarState: AnimationTriggerMetadata;\n} = {\n  /** Animation that shows and hides a snack bar. */\n  snackBarState: trigger('state', [\n    state('void, hidden', style({\n      transform: 'scale(0.8)',\n      opacity: 0,\n    })),\n    state('visible', style({\n      transform: 'scale(1)',\n      opacity: 1,\n    })),\n    transition('* => visible', animate('150ms cubic-bezier(0, 0, 0.2, 1)')),\n    transition('* => void, * => hidden', animate('75ms cubic-bezier(0.4, 0.0, 1, 1)', style({\n      opacity: 0\n    }))),\n  ])\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {AnimationEvent} from '@angular/animations';\nimport {\n  BasePortalOutlet,\n  CdkPortalOutlet,\n  ComponentPortal,\n  TemplatePortal,\n  DomPortal,\n} from '@angular/cdk/portal';\nimport {\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ComponentRef,\n  ElementRef,\n  EmbeddedViewRef,\n  NgZone,\n  OnDestroy,\n  ViewChild,\n  ViewEncapsulation,\n} from '@angular/core';\nimport {Observable, Subject} from 'rxjs';\nimport {take} from 'rxjs/operators';\nimport {matSnackBarAnimations} from './snack-bar-animations';\nimport {MatSnackBarConfig} from './snack-bar-config';\n\n/**\n * Internal interface for a snack bar container.\n * @docs-private\n */\nexport interface _SnackBarContainer {\n  snackBarConfig: MatSnackBarConfig;\n  _onExit: Subject<any>;\n  _onEnter: Subject<any>;\n  enter: () => void;\n  exit: () => Observable<void>;\n  attachTemplatePortal: <C>(portal: TemplatePortal<C>) => EmbeddedViewRef<C>;\n  attachComponentPortal: <T>(portal: ComponentPortal<T>) => ComponentRef<T>;\n}\n\n/**\n * Internal component that wraps user-provided snack bar content.\n * @docs-private\n */\n@Component({\n  selector: 'snack-bar-container',\n  templateUrl: 'snack-bar-container.html',\n  styleUrls: ['snack-bar-container.css'],\n  // In Ivy embedded views will be change detected from their declaration place, rather than\n  // where they were stamped out. This means that we can't have the snack bar container be OnPush,\n  // because it might cause snack bars that were opened from a template not to be out of date.\n  // tslint:disable-next-line:validate-decorators\n  changeDetection: ChangeDetectionStrategy.Default,\n  encapsulation: ViewEncapsulation.None,\n  animations: [matSnackBarAnimations.snackBarState],\n  host: {\n    '[attr.role]': '_role',\n    'class': 'mat-snack-bar-container',\n    '[@state]': '_animationState',\n    '(@state.done)': 'onAnimationEnd($event)'\n  },\n})\nexport class MatSnackBarContainer extends BasePortalOutlet\n    implements OnDestroy, _SnackBarContainer {\n  /** Whether the component has been destroyed. */\n  private _destroyed = false;\n\n  /** The portal outlet inside of this container into which the snack bar content will be loaded. */\n  @ViewChild(CdkPortalOutlet, {static: true}) _portalOutlet: CdkPortalOutlet;\n\n  /** Subject for notifying that the snack bar has exited from view. */\n  readonly _onExit: Subject<void> = new Subject();\n\n  /** Subject for notifying that the snack bar has finished entering the view. */\n  readonly _onEnter: Subject<void> = new Subject();\n\n  /** The state of the snack bar animations. */\n  _animationState = 'void';\n\n  /** ARIA role for the snack bar container. */\n  _role: 'alert' | 'status' | null;\n\n  constructor(\n    private _ngZone: NgZone,\n    private _elementRef: ElementRef<HTMLElement>,\n    private _changeDetectorRef: ChangeDetectorRef,\n    /** The snack bar configuration. */\n    public snackBarConfig: MatSnackBarConfig) {\n\n    super();\n\n    // Based on the ARIA spec, `alert` and `status` roles have an\n    // implicit `assertive` and `polite` politeness respectively.\n    if (snackBarConfig.politeness === 'assertive' && !snackBarConfig.announcementMessage) {\n      this._role = 'alert';\n    } else if (snackBarConfig.politeness === 'off') {\n      this._role = null;\n    } else {\n      this._role = 'status';\n    }\n  }\n\n  /** Attach a component portal as content to this snack bar container. */\n  attachComponentPortal<T>(portal: ComponentPortal<T>): ComponentRef<T> {\n    this._assertNotAttached();\n    this._applySnackBarClasses();\n    return this._portalOutlet.attachComponentPortal(portal);\n  }\n\n  /** Attach a template portal as content to this snack bar container. */\n  attachTemplatePortal<C>(portal: TemplatePortal<C>): EmbeddedViewRef<C> {\n    this._assertNotAttached();\n    this._applySnackBarClasses();\n    return this._portalOutlet.attachTemplatePortal(portal);\n  }\n\n  /**\n   * Attaches a DOM portal to the snack bar container.\n   * @deprecated To be turned into a method.\n   * @breaking-change 10.0.0\n   */\n  attachDomPortal = (portal: DomPortal) => {\n    this._assertNotAttached();\n    this._applySnackBarClasses();\n    return this._portalOutlet.attachDomPortal(portal);\n  }\n\n  /** Handle end of animations, updating the state of the snackbar. */\n  onAnimationEnd(event: AnimationEvent) {\n    const {fromState, toState} = event;\n\n    if ((toState === 'void' && fromState !== 'void') || toState === 'hidden') {\n      this._completeExit();\n    }\n\n    if (toState === 'visible') {\n      // Note: we shouldn't use `this` inside the zone callback,\n      // because it can cause a memory leak.\n      const onEnter = this._onEnter;\n\n      this._ngZone.run(() => {\n        onEnter.next();\n        onEnter.complete();\n      });\n    }\n  }\n\n  /** Begin animation of snack bar entrance into view. */\n  enter(): void {\n    if (!this._destroyed) {\n      this._animationState = 'visible';\n      this._changeDetectorRef.detectChanges();\n    }\n  }\n\n  /** Begin animation of the snack bar exiting from view. */\n  exit(): Observable<void> {\n    // Note: this one transitions to `hidden`, rather than `void`, in order to handle the case\n    // where multiple snack bars are opened in quick succession (e.g. two consecutive calls to\n    // `MatSnackBar.open`).\n    this._animationState = 'hidden';\n\n    // Mark this element with an 'exit' attribute to indicate that the snackbar has\n    // been dismissed and will soon be removed from the DOM. This is used by the snackbar\n    // test harness.\n    this._elementRef.nativeElement.setAttribute('mat-exit', '');\n\n    return this._onExit;\n  }\n\n  /** Makes sure the exit callbacks have been invoked when the element is destroyed. */\n  ngOnDestroy() {\n    this._destroyed = true;\n    this._completeExit();\n  }\n\n  /**\n   * Waits for the zone to settle before removing the element. Helps prevent\n   * errors where we end up removing an element which is in the middle of an animation.\n   */\n  private _completeExit() {\n    this._ngZone.onMicrotaskEmpty.pipe(take(1)).subscribe(() => {\n      this._onExit.next();\n      this._onExit.complete();\n    });\n  }\n\n  /** Applies the various positioning and user-configured CSS classes to the snack bar. */\n  private _applySnackBarClasses() {\n    const element: HTMLElement = this._elementRef.nativeElement;\n    const panelClasses = this.snackBarConfig.panelClass;\n\n    if (panelClasses) {\n      if (Array.isArray(panelClasses)) {\n        // Note that we can't use a spread here, because IE doesn't support multiple arguments.\n        panelClasses.forEach(cssClass => element.classList.add(cssClass));\n      } else {\n        element.classList.add(panelClasses);\n      }\n    }\n\n    if (this.snackBarConfig.horizontalPosition === 'center') {\n      element.classList.add('mat-snack-bar-center');\n    }\n\n    if (this.snackBarConfig.verticalPosition === 'top') {\n      element.classList.add('mat-snack-bar-top');\n    }\n  }\n\n  /** Asserts that no content is already attached to the container. */\n  private _assertNotAttached() {\n    if (this._portalOutlet.hasAttached() && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw Error('Attempting to attach snack bar content after content is already attached');\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {OverlayModule} from '@angular/cdk/overlay';\nimport {PortalModule} from '@angular/cdk/portal';\nimport {CommonModule} from '@angular/common';\nimport {NgModule} from '@angular/core';\nimport {MatCommonModule} from '@angular/material/core';\nimport {MatButtonModule} from '@angular/material/button';\nimport {SimpleSnackBar} from './simple-snack-bar';\nimport {MatSnackBarContainer} from './snack-bar-container';\n\n\n@NgModule({\n  imports: [\n    OverlayModule,\n    PortalModule,\n    CommonModule,\n    MatButtonModule,\n    MatCommonModule,\n  ],\n  exports: [MatSnackBarContainer, MatCommonModule],\n  declarations: [MatSnackBarContainer, SimpleSnackBar],\n  entryComponents: [MatSnackBarContainer, SimpleSnackBar],\n})\nexport class MatSnackBarModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {LiveAnnouncer} from '@angular/cdk/a11y';\nimport {BreakpointObserver, Breakpoints} from '@angular/cdk/layout';\nimport {Overlay, OverlayConfig, OverlayRef} from '@angular/cdk/overlay';\nimport {ComponentPortal, ComponentType, TemplatePortal} from '@angular/cdk/portal';\nimport {\n  ComponentRef,\n  EmbeddedViewRef,\n  Inject,\n  Injectable,\n  InjectionToken,\n  Injector,\n  Optional,\n  SkipSelf,\n  TemplateRef,\n  OnDestroy, Type,\n} from '@angular/core';\nimport {takeUntil} from 'rxjs/operators';\nimport {TextOnlySnackBar, SimpleSnackBar} from './simple-snack-bar';\nimport {MAT_SNACK_BAR_DATA, MatSnackBarConfig} from './snack-bar-config';\nimport {MatSnackBarContainer, _SnackBarContainer} from './snack-bar-container';\nimport {MatSnackBarModule} from './snack-bar-module';\nimport {MatSnackBarRef} from './snack-bar-ref';\n\n\n/** Injection token that can be used to specify default snack bar. */\nexport const MAT_SNACK_BAR_DEFAULT_OPTIONS =\n    new InjectionToken<MatSnackBarConfig>('mat-snack-bar-default-options', {\n      providedIn: 'root',\n      factory: MAT_SNACK_BAR_DEFAULT_OPTIONS_FACTORY,\n    });\n\n/** @docs-private */\nexport function MAT_SNACK_BAR_DEFAULT_OPTIONS_FACTORY(): MatSnackBarConfig {\n  return new MatSnackBarConfig();\n}\n\n/**\n * Service to dispatch Material Design snack bar messages.\n */\n@Injectable({providedIn: MatSnackBarModule})\nexport class MatSnackBar implements OnDestroy {\n  /**\n   * Reference to the current snack bar in the view *at this level* (in the Angular injector tree).\n   * If there is a parent snack-bar service, all operations should delegate to that parent\n   * via `_openedSnackBarRef`.\n   */\n  private _snackBarRefAtThisLevel: MatSnackBarRef<any> | null = null;\n\n  /** The component that should be rendered as the snack bar's simple component. */\n  protected simpleSnackBarComponent: Type<TextOnlySnackBar> = SimpleSnackBar;\n\n  /** The container component that attaches the provided template or component. */\n  protected snackBarContainerComponent: Type<_SnackBarContainer> = MatSnackBarContainer;\n\n  /** The CSS class to applie for handset mode. */\n  protected handsetCssClass = 'mat-snack-bar-handset';\n\n  /** Reference to the currently opened snackbar at *any* level. */\n  get _openedSnackBarRef(): MatSnackBarRef<any> | null {\n    const parent = this._parentSnackBar;\n    return parent ? parent._openedSnackBarRef : this._snackBarRefAtThisLevel;\n  }\n\n  set _openedSnackBarRef(value: MatSnackBarRef<any> | null) {\n    if (this._parentSnackBar) {\n      this._parentSnackBar._openedSnackBarRef = value;\n    } else {\n      this._snackBarRefAtThisLevel = value;\n    }\n  }\n\n  constructor(\n      private _overlay: Overlay,\n      private _live: LiveAnnouncer,\n      private _injector: Injector,\n      private _breakpointObserver: BreakpointObserver,\n      @Optional() @SkipSelf() private _parentSnackBar: MatSnackBar,\n      @Inject(MAT_SNACK_BAR_DEFAULT_OPTIONS) private _defaultConfig: MatSnackBarConfig) {}\n\n  /**\n   * Creates and dispatches a snack bar with a custom component for the content, removing any\n   * currently opened snack bars.\n   *\n   * @param component Component to be instantiated.\n   * @param config Extra configuration for the snack bar.\n   */\n  openFromComponent<T>(component: ComponentType<T>, config?: MatSnackBarConfig):\n      MatSnackBarRef<T> {\n    return this._attach(component, config) as MatSnackBarRef<T>;\n  }\n\n  /**\n   * Creates and dispatches a snack bar with a custom template for the content, removing any\n   * currently opened snack bars.\n   *\n   * @param template Template to be instantiated.\n   * @param config Extra configuration for the snack bar.\n   */\n  openFromTemplate(template: TemplateRef<any>, config?: MatSnackBarConfig):\n      MatSnackBarRef<EmbeddedViewRef<any>> {\n    return this._attach(template, config);\n  }\n\n  /**\n   * Opens a snackbar with a message and an optional action.\n   * @param message The message to show in the snackbar.\n   * @param action The label for the snackbar action.\n   * @param config Additional configuration options for the snackbar.\n   */\n  open(message: string, action: string = '', config?: MatSnackBarConfig):\n      MatSnackBarRef<TextOnlySnackBar> {\n    const _config = {...this._defaultConfig, ...config};\n\n    // Since the user doesn't have access to the component, we can\n    // override the data to pass in our own message and action.\n    _config.data = {message, action};\n\n    // Since the snack bar has `role=\"alert\"`, we don't\n    // want to announce the same message twice.\n    if (_config.announcementMessage === message) {\n      _config.announcementMessage = undefined;\n    }\n\n    return this.openFromComponent(this.simpleSnackBarComponent, _config);\n  }\n\n  /**\n   * Dismisses the currently-visible snack bar.\n   */\n  dismiss(): void {\n    if (this._openedSnackBarRef) {\n      this._openedSnackBarRef.dismiss();\n    }\n  }\n\n  ngOnDestroy() {\n    // Only dismiss the snack bar at the current level on destroy.\n    if (this._snackBarRefAtThisLevel) {\n      this._snackBarRefAtThisLevel.dismiss();\n    }\n  }\n\n  /**\n   * Attaches the snack bar container component to the overlay.\n   */\n  private _attachSnackBarContainer(overlayRef: OverlayRef,\n                                     config: MatSnackBarConfig): _SnackBarContainer {\n\n    const userInjector = config && config.viewContainerRef && config.viewContainerRef.injector;\n    const injector = Injector.create({\n      parent: userInjector || this._injector,\n      providers: [{provide: MatSnackBarConfig, useValue: config}]\n    });\n\n    const containerPortal =\n        new ComponentPortal(this.snackBarContainerComponent, config.viewContainerRef, injector);\n    const containerRef: ComponentRef<_SnackBarContainer> =\n        overlayRef.attach(containerPortal);\n    containerRef.instance.snackBarConfig = config;\n    return containerRef.instance;\n  }\n\n  /**\n   * Places a new component or a template as the content of the snack bar container.\n   */\n  private _attach<T>(content: ComponentType<T> | TemplateRef<T>, userConfig?: MatSnackBarConfig):\n      MatSnackBarRef<T | EmbeddedViewRef<any>> {\n\n    const config = {...new MatSnackBarConfig(), ...this._defaultConfig, ...userConfig};\n    const overlayRef = this._createOverlay(config);\n    const container = this._attachSnackBarContainer(overlayRef, config);\n    const snackBarRef = new MatSnackBarRef<T | EmbeddedViewRef<any>>(container, overlayRef);\n\n    if (content instanceof TemplateRef) {\n      const portal = new TemplatePortal(content, null!, {\n        $implicit: config.data,\n        snackBarRef\n      } as any);\n\n      snackBarRef.instance = container.attachTemplatePortal(portal);\n    } else {\n      const injector = this._createInjector(config, snackBarRef);\n      const portal = new ComponentPortal(content, undefined, injector);\n      const contentRef = container.attachComponentPortal<T>(portal);\n\n      // We can't pass this via the injector, because the injector is created earlier.\n      snackBarRef.instance = contentRef.instance;\n    }\n\n    // Subscribe to the breakpoint observer and attach the mat-snack-bar-handset class as\n    // appropriate. This class is applied to the overlay element because the overlay must expand to\n    // fill the width of the screen for full width snackbars.\n    this._breakpointObserver.observe(Breakpoints.HandsetPortrait).pipe(\n        takeUntil(overlayRef.detachments())\n    ).subscribe(state => {\n      const classList = overlayRef.overlayElement.classList;\n      state.matches ? classList.add(this.handsetCssClass) : classList.remove(this.handsetCssClass);\n    });\n\n    this._animateSnackBar(snackBarRef, config);\n    this._openedSnackBarRef = snackBarRef;\n    return this._openedSnackBarRef;\n  }\n\n  /** Animates the old snack bar out and the new one in. */\n  private _animateSnackBar(snackBarRef: MatSnackBarRef<any>, config: MatSnackBarConfig) {\n    // When the snackbar is dismissed, clear the reference to it.\n    snackBarRef.afterDismissed().subscribe(() => {\n      // Clear the snackbar ref if it hasn't already been replaced by a newer snackbar.\n      if (this._openedSnackBarRef == snackBarRef) {\n        this._openedSnackBarRef = null;\n      }\n\n      if (config.announcementMessage) {\n        this._live.clear();\n      }\n    });\n\n    if (this._openedSnackBarRef) {\n      // If a snack bar is already in view, dismiss it and enter the\n      // new snack bar after exit animation is complete.\n      this._openedSnackBarRef.afterDismissed().subscribe(() => {\n        snackBarRef.containerInstance.enter();\n      });\n      this._openedSnackBarRef.dismiss();\n    } else {\n      // If no snack bar is in view, enter the new snack bar.\n      snackBarRef.containerInstance.enter();\n    }\n\n    // If a dismiss timeout is provided, set up dismiss based on after the snackbar is opened.\n    if (config.duration && config.duration > 0) {\n      snackBarRef.afterOpened().subscribe(() => snackBarRef._dismissAfter(config.duration!));\n    }\n\n    if (config.announcementMessage) {\n      this._live.announce(config.announcementMessage, config.politeness);\n    }\n  }\n\n  /**\n   * Creates a new overlay and places it in the correct location.\n   * @param config The user-specified snack bar config.\n   */\n  private _createOverlay(config: MatSnackBarConfig): OverlayRef {\n    const overlayConfig = new OverlayConfig();\n    overlayConfig.direction = config.direction;\n\n    let positionStrategy = this._overlay.position().global();\n    // Set horizontal position.\n    const isRtl = config.direction === 'rtl';\n    const isLeft = (\n        config.horizontalPosition === 'left' ||\n        (config.horizontalPosition === 'start' && !isRtl) ||\n        (config.horizontalPosition === 'end' && isRtl));\n    const isRight = !isLeft && config.horizontalPosition !== 'center';\n    if (isLeft) {\n      positionStrategy.left('0');\n    } else if (isRight) {\n      positionStrategy.right('0');\n    } else {\n      positionStrategy.centerHorizontally();\n    }\n    // Set horizontal position.\n    if (config.verticalPosition === 'top') {\n      positionStrategy.top('0');\n    } else {\n      positionStrategy.bottom('0');\n    }\n\n    overlayConfig.positionStrategy = positionStrategy;\n    return this._overlay.create(overlayConfig);\n  }\n\n  /**\n   * Creates an injector to be used inside of a snack bar component.\n   * @param config Config that was used to create the snack bar.\n   * @param snackBarRef Reference to the snack bar.\n   */\n  private _createInjector<T>(config: MatSnackBarConfig, snackBarRef: MatSnackBarRef<T>): Injector {\n    const userInjector = config && config.viewContainerRef && config.viewContainerRef.injector;\n\n    return Injector.create({\n      parent: userInjector || this._injector,\n      providers: [\n        {provide: MatSnackBarRef, useValue: snackBarRef},\n        {provide: MAT_SNACK_BAR_DATA, useValue: config.data}\n      ]\n    });\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './snack-bar-module';\nexport * from './snack-bar';\nexport * from './snack-bar-container';\nexport * from './snack-bar-config';\nexport * from './snack-bar-ref';\nexport * from './simple-snack-bar';\nexport * from './snack-bar-animations';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","import { Subscriber } from '../Subscriber';\nimport { Notification } from '../Notification';\nexport function materialize() {\n    return function materializeOperatorFunction(source) {\n        return source.lift(new MaterializeOperator());\n    };\n}\nclass MaterializeOperator {\n    call(subscriber, source) {\n        return source.subscribe(new MaterializeSubscriber(subscriber));\n    }\n}\nclass MaterializeSubscriber extends Subscriber {\n    constructor(destination) {\n        super(destination);\n    }\n    _next(value) {\n        this.destination.next(Notification.createNext(value));\n    }\n    _error(err) {\n        const destination = this.destination;\n        destination.next(Notification.createError(err));\n        destination.complete();\n    }\n    _complete() {\n        const destination = this.destination;\n        destination.next(Notification.createComplete());\n        destination.complete();\n    }\n}\n//# sourceMappingURL=materialize.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar audit_1 = require(\"../../operator/audit\");\nrxjs_1.Observable.prototype.audit = audit_1.audit;\n//# sourceMappingURL=audit.js.map","import { Observable } from '../Observable';\nimport { Notification } from '../Notification';\nimport { ColdObservable } from './ColdObservable';\nimport { HotObservable } from './HotObservable';\nimport { SubscriptionLog } from './SubscriptionLog';\nimport { VirtualTimeScheduler, VirtualAction } from '../scheduler/VirtualTimeScheduler';\nimport { AsyncScheduler } from '../scheduler/AsyncScheduler';\nconst defaultMaxFrame = 750;\nexport class TestScheduler extends VirtualTimeScheduler {\n    constructor(assertDeepEqual) {\n        super(VirtualAction, defaultMaxFrame);\n        this.assertDeepEqual = assertDeepEqual;\n        this.hotObservables = [];\n        this.coldObservables = [];\n        this.flushTests = [];\n        this.runMode = false;\n    }\n    createTime(marbles) {\n        const indexOf = marbles.indexOf('|');\n        if (indexOf === -1) {\n            throw new Error('marble diagram for time should have a completion marker \"|\"');\n        }\n        return indexOf * TestScheduler.frameTimeFactor;\n    }\n    createColdObservable(marbles, values, error) {\n        if (marbles.indexOf('^') !== -1) {\n            throw new Error('cold observable cannot have subscription offset \"^\"');\n        }\n        if (marbles.indexOf('!') !== -1) {\n            throw new Error('cold observable cannot have unsubscription marker \"!\"');\n        }\n        const messages = TestScheduler.parseMarbles(marbles, values, error, undefined, this.runMode);\n        const cold = new ColdObservable(messages, this);\n        this.coldObservables.push(cold);\n        return cold;\n    }\n    createHotObservable(marbles, values, error) {\n        if (marbles.indexOf('!') !== -1) {\n            throw new Error('hot observable cannot have unsubscription marker \"!\"');\n        }\n        const messages = TestScheduler.parseMarbles(marbles, values, error, undefined, this.runMode);\n        const subject = new HotObservable(messages, this);\n        this.hotObservables.push(subject);\n        return subject;\n    }\n    materializeInnerObservable(observable, outerFrame) {\n        const messages = [];\n        observable.subscribe((value) => {\n            messages.push({ frame: this.frame - outerFrame, notification: Notification.createNext(value) });\n        }, (err) => {\n            messages.push({ frame: this.frame - outerFrame, notification: Notification.createError(err) });\n        }, () => {\n            messages.push({ frame: this.frame - outerFrame, notification: Notification.createComplete() });\n        });\n        return messages;\n    }\n    expectObservable(observable, subscriptionMarbles = null) {\n        const actual = [];\n        const flushTest = { actual, ready: false };\n        const subscriptionParsed = TestScheduler.parseMarblesAsSubscriptions(subscriptionMarbles, this.runMode);\n        const subscriptionFrame = subscriptionParsed.subscribedFrame === Number.POSITIVE_INFINITY ?\n            0 : subscriptionParsed.subscribedFrame;\n        const unsubscriptionFrame = subscriptionParsed.unsubscribedFrame;\n        let subscription;\n        this.schedule(() => {\n            subscription = observable.subscribe(x => {\n                let value = x;\n                if (x instanceof Observable) {\n                    value = this.materializeInnerObservable(value, this.frame);\n                }\n                actual.push({ frame: this.frame, notification: Notification.createNext(value) });\n            }, (err) => {\n                actual.push({ frame: this.frame, notification: Notification.createError(err) });\n            }, () => {\n                actual.push({ frame: this.frame, notification: Notification.createComplete() });\n            });\n        }, subscriptionFrame);\n        if (unsubscriptionFrame !== Number.POSITIVE_INFINITY) {\n            this.schedule(() => subscription.unsubscribe(), unsubscriptionFrame);\n        }\n        this.flushTests.push(flushTest);\n        const { runMode } = this;\n        return {\n            toBe(marbles, values, errorValue) {\n                flushTest.ready = true;\n                flushTest.expected = TestScheduler.parseMarbles(marbles, values, errorValue, true, runMode);\n            }\n        };\n    }\n    expectSubscriptions(actualSubscriptionLogs) {\n        const flushTest = { actual: actualSubscriptionLogs, ready: false };\n        this.flushTests.push(flushTest);\n        const { runMode } = this;\n        return {\n            toBe(marbles) {\n                const marblesArray = (typeof marbles === 'string') ? [marbles] : marbles;\n                flushTest.ready = true;\n                flushTest.expected = marblesArray.map(marbles => TestScheduler.parseMarblesAsSubscriptions(marbles, runMode));\n            }\n        };\n    }\n    flush() {\n        const hotObservables = this.hotObservables;\n        while (hotObservables.length > 0) {\n            hotObservables.shift().setup();\n        }\n        super.flush();\n        this.flushTests = this.flushTests.filter(test => {\n            if (test.ready) {\n                this.assertDeepEqual(test.actual, test.expected);\n                return false;\n            }\n            return true;\n        });\n    }\n    static parseMarblesAsSubscriptions(marbles, runMode = false) {\n        if (typeof marbles !== 'string') {\n            return new SubscriptionLog(Number.POSITIVE_INFINITY);\n        }\n        const len = marbles.length;\n        let groupStart = -1;\n        let subscriptionFrame = Number.POSITIVE_INFINITY;\n        let unsubscriptionFrame = Number.POSITIVE_INFINITY;\n        let frame = 0;\n        for (let i = 0; i < len; i++) {\n            let nextFrame = frame;\n            const advanceFrameBy = (count) => {\n                nextFrame += count * this.frameTimeFactor;\n            };\n            const c = marbles[i];\n            switch (c) {\n                case ' ':\n                    if (!runMode) {\n                        advanceFrameBy(1);\n                    }\n                    break;\n                case '-':\n                    advanceFrameBy(1);\n                    break;\n                case '(':\n                    groupStart = frame;\n                    advanceFrameBy(1);\n                    break;\n                case ')':\n                    groupStart = -1;\n                    advanceFrameBy(1);\n                    break;\n                case '^':\n                    if (subscriptionFrame !== Number.POSITIVE_INFINITY) {\n                        throw new Error('found a second subscription point \\'^\\' in a ' +\n                            'subscription marble diagram. There can only be one.');\n                    }\n                    subscriptionFrame = groupStart > -1 ? groupStart : frame;\n                    advanceFrameBy(1);\n                    break;\n                case '!':\n                    if (unsubscriptionFrame !== Number.POSITIVE_INFINITY) {\n                        throw new Error('found a second subscription point \\'^\\' in a ' +\n                            'subscription marble diagram. There can only be one.');\n                    }\n                    unsubscriptionFrame = groupStart > -1 ? groupStart : frame;\n                    break;\n                default:\n                    if (runMode && c.match(/^[0-9]$/)) {\n                        if (i === 0 || marbles[i - 1] === ' ') {\n                            const buffer = marbles.slice(i);\n                            const match = buffer.match(/^([0-9]+(?:\\.[0-9]+)?)(ms|s|m) /);\n                            if (match) {\n                                i += match[0].length - 1;\n                                const duration = parseFloat(match[1]);\n                                const unit = match[2];\n                                let durationInMs;\n                                switch (unit) {\n                                    case 'ms':\n                                        durationInMs = duration;\n                                        break;\n                                    case 's':\n                                        durationInMs = duration * 1000;\n                                        break;\n                                    case 'm':\n                                        durationInMs = duration * 1000 * 60;\n                                        break;\n                                    default:\n                                        break;\n                                }\n                                advanceFrameBy(durationInMs / this.frameTimeFactor);\n                                break;\n                            }\n                        }\n                    }\n                    throw new Error('there can only be \\'^\\' and \\'!\\' markers in a ' +\n                        'subscription marble diagram. Found instead \\'' + c + '\\'.');\n            }\n            frame = nextFrame;\n        }\n        if (unsubscriptionFrame < 0) {\n            return new SubscriptionLog(subscriptionFrame);\n        }\n        else {\n            return new SubscriptionLog(subscriptionFrame, unsubscriptionFrame);\n        }\n    }\n    static parseMarbles(marbles, values, errorValue, materializeInnerObservables = false, runMode = false) {\n        if (marbles.indexOf('!') !== -1) {\n            throw new Error('conventional marble diagrams cannot have the ' +\n                'unsubscription marker \"!\"');\n        }\n        const len = marbles.length;\n        const testMessages = [];\n        const subIndex = runMode ? marbles.replace(/^[ ]+/, '').indexOf('^') : marbles.indexOf('^');\n        let frame = subIndex === -1 ? 0 : (subIndex * -this.frameTimeFactor);\n        const getValue = typeof values !== 'object' ?\n            (x) => x :\n            (x) => {\n                if (materializeInnerObservables && values[x] instanceof ColdObservable) {\n                    return values[x].messages;\n                }\n                return values[x];\n            };\n        let groupStart = -1;\n        for (let i = 0; i < len; i++) {\n            let nextFrame = frame;\n            const advanceFrameBy = (count) => {\n                nextFrame += count * this.frameTimeFactor;\n            };\n            let notification;\n            const c = marbles[i];\n            switch (c) {\n                case ' ':\n                    if (!runMode) {\n                        advanceFrameBy(1);\n                    }\n                    break;\n                case '-':\n                    advanceFrameBy(1);\n                    break;\n                case '(':\n                    groupStart = frame;\n                    advanceFrameBy(1);\n                    break;\n                case ')':\n                    groupStart = -1;\n                    advanceFrameBy(1);\n                    break;\n                case '|':\n                    notification = Notification.createComplete();\n                    advanceFrameBy(1);\n                    break;\n                case '^':\n                    advanceFrameBy(1);\n                    break;\n                case '#':\n                    notification = Notification.createError(errorValue || 'error');\n                    advanceFrameBy(1);\n                    break;\n                default:\n                    if (runMode && c.match(/^[0-9]$/)) {\n                        if (i === 0 || marbles[i - 1] === ' ') {\n                            const buffer = marbles.slice(i);\n                            const match = buffer.match(/^([0-9]+(?:\\.[0-9]+)?)(ms|s|m) /);\n                            if (match) {\n                                i += match[0].length - 1;\n                                const duration = parseFloat(match[1]);\n                                const unit = match[2];\n                                let durationInMs;\n                                switch (unit) {\n                                    case 'ms':\n                                        durationInMs = duration;\n                                        break;\n                                    case 's':\n                                        durationInMs = duration * 1000;\n                                        break;\n                                    case 'm':\n                                        durationInMs = duration * 1000 * 60;\n                                        break;\n                                    default:\n                                        break;\n                                }\n                                advanceFrameBy(durationInMs / this.frameTimeFactor);\n                                break;\n                            }\n                        }\n                    }\n                    notification = Notification.createNext(getValue(c));\n                    advanceFrameBy(1);\n                    break;\n            }\n            if (notification) {\n                testMessages.push({ frame: groupStart > -1 ? groupStart : frame, notification });\n            }\n            frame = nextFrame;\n        }\n        return testMessages;\n    }\n    run(callback) {\n        const prevFrameTimeFactor = TestScheduler.frameTimeFactor;\n        const prevMaxFrames = this.maxFrames;\n        TestScheduler.frameTimeFactor = 1;\n        this.maxFrames = Number.POSITIVE_INFINITY;\n        this.runMode = true;\n        AsyncScheduler.delegate = this;\n        const helpers = {\n            cold: this.createColdObservable.bind(this),\n            hot: this.createHotObservable.bind(this),\n            flush: this.flush.bind(this),\n            expectObservable: this.expectObservable.bind(this),\n            expectSubscriptions: this.expectSubscriptions.bind(this),\n        };\n        try {\n            const ret = callback(helpers);\n            this.flush();\n            return ret;\n        }\n        finally {\n            TestScheduler.frameTimeFactor = prevFrameTimeFactor;\n            this.maxFrames = prevMaxFrames;\n            this.runMode = false;\n            AsyncScheduler.delegate = undefined;\n        }\n    }\n}\n//# sourceMappingURL=TestScheduler.js.map","import { map } from './map';\nimport { from } from '../observable/from';\nimport { SimpleOuterSubscriber, SimpleInnerSubscriber, innerSubscribe } from '../innerSubscribe';\nexport function switchMap(project, resultSelector) {\n    if (typeof resultSelector === 'function') {\n        return (source) => source.pipe(switchMap((a, i) => from(project(a, i)).pipe(map((b, ii) => resultSelector(a, b, i, ii)))));\n    }\n    return (source) => source.lift(new SwitchMapOperator(project));\n}\nclass SwitchMapOperator {\n    constructor(project) {\n        this.project = project;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new SwitchMapSubscriber(subscriber, this.project));\n    }\n}\nclass SwitchMapSubscriber extends SimpleOuterSubscriber {\n    constructor(destination, project) {\n        super(destination);\n        this.project = project;\n        this.index = 0;\n    }\n    _next(value) {\n        let result;\n        const index = this.index++;\n        try {\n            result = this.project(value, index);\n        }\n        catch (error) {\n            this.destination.error(error);\n            return;\n        }\n        this._innerSub(result);\n    }\n    _innerSub(result) {\n        const innerSubscription = this.innerSubscription;\n        if (innerSubscription) {\n            innerSubscription.unsubscribe();\n        }\n        const innerSubscriber = new SimpleInnerSubscriber(this);\n        const destination = this.destination;\n        destination.add(innerSubscriber);\n        this.innerSubscription = innerSubscribe(result, innerSubscriber);\n        if (this.innerSubscription !== innerSubscriber) {\n            destination.add(this.innerSubscription);\n        }\n    }\n    _complete() {\n        const { innerSubscription } = this;\n        if (!innerSubscription || innerSubscription.closed) {\n            super._complete();\n        }\n        this.unsubscribe();\n    }\n    _unsubscribe() {\n        this.innerSubscription = undefined;\n    }\n    notifyComplete() {\n        this.innerSubscription = undefined;\n        if (this.isStopped) {\n            super._complete();\n        }\n    }\n    notifyNext(innerValue) {\n        this.destination.next(innerValue);\n    }\n}\n//# sourceMappingURL=switchMap.js.map","import { AnimationFrameAction } from './AnimationFrameAction';\nimport { AnimationFrameScheduler } from './AnimationFrameScheduler';\nexport const animationFrameScheduler = new AnimationFrameScheduler(AnimationFrameAction);\nexport const animationFrame = animationFrameScheduler;\n//# sourceMappingURL=animationFrame.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Projects each source value to the same Observable which is merged multiple\n * times in a serialized fashion on the output Observable.\n *\n * <span class=\"informal\">It's like {@link concatMap}, but maps each value\n * always to the same inner Observable.</span>\n *\n * <img src=\"./img/concatMapTo.png\" width=\"100%\">\n *\n * Maps each source value to the given Observable `innerObservable` regardless\n * of the source value, and then flattens those resulting Observables into one\n * single Observable, which is the output Observable. Each new `innerObservable`\n * instance emitted on the output Observable is concatenated with the previous\n * `innerObservable` instance.\n *\n * __Warning:__ if source values arrive endlessly and faster than their\n * corresponding inner Observables can complete, it will result in memory issues\n * as inner Observables amass in an unbounded buffer waiting for their turn to\n * be subscribed to.\n *\n * Note: `concatMapTo` is equivalent to `mergeMapTo` with concurrency parameter\n * set to `1`.\n *\n * @example <caption>For each click event, tick every second from 0 to 3, with no concurrency</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.concatMapTo(Rx.Observable.interval(1000).take(4));\n * result.subscribe(x => console.log(x));\n *\n * // Results in the following:\n * // (results are not concurrent)\n * // For every click on the \"document\" it will emit values 0 to 3 spaced\n * // on a 1000ms interval\n * // one click = 1000ms-> 0 -1000ms-> 1 -1000ms-> 2 -1000ms-> 3\n *\n * @see {@link concat}\n * @see {@link concatAll}\n * @see {@link concatMap}\n * @see {@link mergeMapTo}\n * @see {@link switchMapTo}\n *\n * @param {ObservableInput} innerObservable An Observable to replace each value from\n * the source Observable.\n * @return {Observable} An observable of values merged together by joining the\n * passed observable with itself, one after the other, for each value emitted\n * from the source.\n * @method concatMapTo\n * @owner Observable\n */\nfunction concatMapTo(innerObservable) {\n    return operators_1.concatMapTo(innerObservable)(this);\n}\nexports.concatMapTo = concatMapTo;\n//# sourceMappingURL=concatMapTo.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar retryWhen_1 = require(\"../../operator/retryWhen\");\nrxjs_1.Observable.prototype.retryWhen = retryWhen_1.retryWhen;\n//# sourceMappingURL=retryWhen.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/* tslint:enable:max-line-length */\n/**\n * Applies an accumulator function over the source Observable, and returns each\n * intermediate result, with an optional seed value.\n *\n * <span class=\"informal\">It's like {@link reduce}, but emits the current\n * accumulation whenever the source emits a value.</span>\n *\n * <img src=\"./img/scan.png\" width=\"100%\">\n *\n * Combines together all values emitted on the source, using an accumulator\n * function that knows how to join a new source value into the accumulation from\n * the past. Is similar to {@link reduce}, but emits the intermediate\n * accumulations.\n *\n * Returns an Observable that applies a specified `accumulator` function to each\n * item emitted by the source Observable. If a `seed` value is specified, then\n * that value will be used as the initial value for the accumulator. If no seed\n * value is specified, the first item of the source is used as the seed.\n *\n * @example <caption>Count the number of click events</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var ones = clicks.mapTo(1);\n * var seed = 0;\n * var count = ones.scan((acc, one) => acc + one, seed);\n * count.subscribe(x => console.log(x));\n *\n * @see {@link expand}\n * @see {@link mergeScan}\n * @see {@link reduce}\n *\n * @param {function(acc: R, value: T, index: number): R} accumulator\n * The accumulator function called on each source value.\n * @param {T|R} [seed] The initial accumulation value.\n * @return {Observable<R>} An observable of the accumulated values.\n * @method scan\n * @owner Observable\n */\nfunction scan(accumulator, seed) {\n    if (arguments.length >= 2) {\n        return operators_1.scan(accumulator, seed)(this);\n    }\n    return operators_1.scan(accumulator)(this);\n}\nexports.scan = scan;\n//# sourceMappingURL=scan.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar mergeScan_1 = require(\"../../operator/mergeScan\");\nrxjs_1.Observable.prototype.mergeScan = mergeScan_1.mergeScan;\n//# sourceMappingURL=mergeScan.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ChangeDetectionStrategy, Component, Input, ViewEncapsulation} from '@angular/core';\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\n\n@Component({\n  selector: 'mat-divider',\n  host: {\n    'role': 'separator',\n    '[attr.aria-orientation]': 'vertical ? \"vertical\" : \"horizontal\"',\n    '[class.mat-divider-vertical]': 'vertical',\n    '[class.mat-divider-horizontal]': '!vertical',\n    '[class.mat-divider-inset]': 'inset',\n    'class': 'mat-divider'\n  },\n  template: '',\n  styleUrls: ['divider.css'],\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n})\nexport class MatDivider {\n  /** Whether the divider is vertically aligned. */\n  @Input()\n  get vertical(): boolean { return this._vertical; }\n  set vertical(value: boolean) { this._vertical = coerceBooleanProperty(value); }\n  private _vertical: boolean = false;\n\n  /** Whether the divider is an inset divider. */\n  @Input()\n  get inset(): boolean { return this._inset; }\n  set inset(value: boolean) { this._inset = coerceBooleanProperty(value); }\n  private _inset: boolean = false;\n\n  static ngAcceptInputType_vertical: BooleanInput;\n  static ngAcceptInputType_inset: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgModule} from '@angular/core';\nimport {MatCommonModule} from '@angular/material/core';\nimport {MatDivider} from './divider';\n\n\n@NgModule({\n  imports: [MatCommonModule],\n  exports: [MatDivider, MatCommonModule],\n  declarations: [MatDivider],\n})\nexport class MatDividerModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './divider';\nexport * from './divider-module';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","import { concat as concatStatic } from '../observable/concat';\nexport function concat(...observables) {\n    return (source) => source.lift.call(concatStatic(source, ...observables));\n}\n//# sourceMappingURL=concat.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {coerceBooleanProperty} from '@angular/cdk/coercion';\n\n/** @docs-private */\nexport type Constructor<T> = new(...args: any[]) => T;\n\n/**\n * Interface for a mixin to provide a directive with a function that checks if the sticky input has\n * been changed since the last time the function was called. Essentially adds a dirty-check to the\n * sticky value.\n * @docs-private\n */\nexport interface CanStick {\n  /** Whether sticky positioning should be applied. */\n  sticky: boolean;\n\n  /** Whether the sticky input has changed since it was last checked. */\n  _hasStickyChanged: boolean;\n\n  /** Whether the sticky value has changed since this was last called. */\n  hasStickyChanged(): boolean;\n\n  /** Resets the dirty check for cases where the sticky state has been used without checking. */\n  resetStickyChanged(): void;\n}\n\n/** @docs-private */\nexport type CanStickCtor = Constructor<CanStick>;\n\n/**\n * Mixin to provide a directive with a function that checks if the sticky input has been\n * changed since the last time the function was called. Essentially adds a dirty-check to the\n * sticky value.\n * @docs-private\n */\nexport function mixinHasStickyInput<T extends Constructor<{}>>(base: T): CanStickCtor & T {\n  return class extends base {\n    /** Whether sticky positioning should be applied. */\n    get sticky(): boolean { return this._sticky; }\n    set sticky(v: boolean) {\n      const prevValue = this._sticky;\n      this._sticky = coerceBooleanProperty(v);\n      this._hasStickyChanged = prevValue !== this._sticky;\n    }\n    _sticky: boolean = false;\n\n    /** Whether the sticky input has changed since it was last checked. */\n    _hasStickyChanged: boolean = false;\n\n    /** Whether the sticky value has changed since this was last called. */\n    hasStickyChanged(): boolean {\n      const hasStickyChanged = this._hasStickyChanged;\n      this._hasStickyChanged = false;\n      return hasStickyChanged;\n    }\n\n    /** Resets the dirty check for cases where the sticky state has been used without checking. */\n    resetStickyChanged() {\n      this._hasStickyChanged = false;\n    }\n\n    constructor(...args: any[]) { super(...args); }\n  };\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {InjectionToken} from '@angular/core';\n\n/**\n * Used to provide a table to some of the sub-components without causing a circular dependency.\n * @docs-private\n */\nexport const CDK_TABLE = new InjectionToken<any>('CDK_TABLE');\n\n/** Configurable options for `CdkTextColumn`. */\nexport interface TextColumnOptions<T> {\n  /**\n   * Default function that provides the header text based on the column name if a header\n   * text is not provided.\n   */\n  defaultHeaderTextTransform?: (name: string) => string;\n\n  /** Default data accessor to use if one is not provided. */\n  defaultDataAccessor?: (data: T, name: string) => string;\n}\n\n/** Injection token that can be used to specify the text column options. */\nexport const TEXT_COLUMN_OPTIONS =\n    new InjectionToken<TextColumnOptions<any>>('text-column-options');\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {\n  ContentChild,\n  Directive,\n  ElementRef,\n  Input,\n  TemplateRef,\n  Inject,\n  Optional,\n} from '@angular/core';\nimport {CanStick, CanStickCtor, mixinHasStickyInput} from './can-stick';\nimport {CDK_TABLE} from './tokens';\n\n\n/** Base interface for a cell definition. Captures a column's cell template definition. */\nexport interface CellDef {\n  template: TemplateRef<any>;\n}\n\n/**\n * Cell definition for a CDK table.\n * Captures the template of a column's data row cell as well as cell-specific properties.\n */\n@Directive({selector: '[cdkCellDef]'})\nexport class CdkCellDef implements CellDef {\n  constructor(/** @docs-private */ public template: TemplateRef<any>) {}\n}\n\n/**\n * Header cell definition for a CDK table.\n * Captures the template of a column's header cell and as well as cell-specific properties.\n */\n@Directive({selector: '[cdkHeaderCellDef]'})\nexport class CdkHeaderCellDef implements CellDef {\n  constructor(/** @docs-private */ public template: TemplateRef<any>) {}\n}\n\n/**\n * Footer cell definition for a CDK table.\n * Captures the template of a column's footer cell and as well as cell-specific properties.\n */\n@Directive({selector: '[cdkFooterCellDef]'})\nexport class CdkFooterCellDef implements CellDef {\n  constructor(/** @docs-private */ public template: TemplateRef<any>) {}\n}\n\n// Boilerplate for applying mixins to CdkColumnDef.\n/** @docs-private */\nclass CdkColumnDefBase {}\nconst _CdkColumnDefBase: CanStickCtor&typeof CdkColumnDefBase =\n    mixinHasStickyInput(CdkColumnDefBase);\n\n/**\n * Column definition for the CDK table.\n * Defines a set of cells available for a table column.\n */\n@Directive({\n  selector: '[cdkColumnDef]',\n  inputs: ['sticky'],\n  providers: [{provide: 'MAT_SORT_HEADER_COLUMN_DEF', useExisting: CdkColumnDef}],\n})\nexport class CdkColumnDef extends _CdkColumnDefBase implements CanStick {\n  /** Unique name for this column. */\n  @Input('cdkColumnDef')\n  get name(): string { return this._name; }\n  set name(name: string) { this._setNameInput(name); }\n  protected _name: string;\n\n  /**\n   * Whether this column should be sticky positioned on the end of the row. Should make sure\n   * that it mimics the `CanStick` mixin such that `_hasStickyChanged` is set to true if the value\n   * has been changed.\n   */\n  @Input('stickyEnd')\n  get stickyEnd(): boolean {\n    return this._stickyEnd;\n  }\n  set stickyEnd(v: boolean) {\n    const prevValue = this._stickyEnd;\n    this._stickyEnd = coerceBooleanProperty(v);\n    this._hasStickyChanged = prevValue !== this._stickyEnd;\n  }\n  _stickyEnd: boolean = false;\n\n  /** @docs-private */\n  @ContentChild(CdkCellDef) cell: CdkCellDef;\n\n  /** @docs-private */\n  @ContentChild(CdkHeaderCellDef) headerCell: CdkHeaderCellDef;\n\n  /** @docs-private */\n  @ContentChild(CdkFooterCellDef) footerCell: CdkFooterCellDef;\n\n  /**\n   * Transformed version of the column name that can be used as part of a CSS classname. Excludes\n   * all non-alphanumeric characters and the special characters '-' and '_'. Any characters that\n   * do not match are replaced by the '-' character.\n   */\n  cssClassFriendlyName: string;\n\n  /**\n   * Class name for cells in this column.\n   * @docs-private\n   */\n  _columnCssClassName: string[];\n\n  constructor(@Inject(CDK_TABLE) @Optional() public _table?: any) {\n    super();\n  }\n\n  /**\n   * Overridable method that sets the css classes that will be added to every cell in this\n   * column.\n   * In the future, columnCssClassName will change from type string[] to string and this\n   * will set a single string value.\n   * @docs-private\n   */\n  protected _updateColumnCssClassName() {\n    this._columnCssClassName = [`cdk-column-${this.cssClassFriendlyName}`];\n  }\n\n  /**\n   * This has been extracted to a util because of TS 4 and VE.\n   * View Engine doesn't support property rename inheritance.\n   * TS 4.0 doesn't allow properties to override accessors or vice-versa.\n   * @docs-private\n   */\n  protected _setNameInput(value: string) {\n    // If the directive is set without a name (updated programatically), then this setter will\n    // trigger with an empty string and should not overwrite the programatically set value.\n    if (value) {\n      this._name = value;\n      this.cssClassFriendlyName = value.replace(/[^a-z0-9_-]/ig, '-');\n      this._updateColumnCssClassName();\n    }\n  }\n\n  static ngAcceptInputType_sticky: BooleanInput;\n  static ngAcceptInputType_stickyEnd: BooleanInput;\n}\n\n/** Base class for the cells. Adds a CSS classname that identifies the column it renders in. */\nexport class BaseCdkCell {\n  constructor(columnDef: CdkColumnDef, elementRef: ElementRef) {\n    // If IE 11 is dropped before we switch to setting a single class name, change to multi param\n    // with destructuring.\n    const classList = elementRef.nativeElement.classList;\n    for (const className of columnDef._columnCssClassName) {\n      classList.add(className);\n    }\n  }\n}\n\n/** Header cell template container that adds the right classes and role. */\n@Directive({\n  selector: 'cdk-header-cell, th[cdk-header-cell]',\n  host: {\n    'class': 'cdk-header-cell',\n    'role': 'columnheader',\n  },\n})\nexport class CdkHeaderCell extends BaseCdkCell {\n  constructor(columnDef: CdkColumnDef, elementRef: ElementRef) {\n    super(columnDef, elementRef);\n  }\n}\n\n/** Footer cell template container that adds the right classes and role. */\n@Directive({\n  selector: 'cdk-footer-cell, td[cdk-footer-cell]',\n  host: {\n    'class': 'cdk-footer-cell',\n    'role': 'gridcell',\n  },\n})\nexport class CdkFooterCell extends BaseCdkCell {\n  constructor(columnDef: CdkColumnDef, elementRef: ElementRef) {\n    super(columnDef, elementRef);\n  }\n}\n\n/** Cell template container that adds the right classes and role. */\n@Directive({\n  selector: 'cdk-cell, td[cdk-cell]',\n  host: {\n    'class': 'cdk-cell',\n    'role': 'gridcell',\n  },\n})\nexport class CdkCell extends BaseCdkCell {\n  constructor(columnDef: CdkColumnDef, elementRef: ElementRef) {\n    super(columnDef, elementRef);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable, NgZone, OnDestroy, InjectionToken} from '@angular/core';\nimport {from, Subject} from 'rxjs';\nimport {take, takeUntil} from 'rxjs/operators';\n\n/**\n * @docs-private\n */\nexport class _Schedule {\n  tasks: (() => unknown)[] = [];\n  endTasks: (() => unknown)[] = [];\n}\n\n/** Injection token used to provide a coalesced style scheduler. */\nexport const _COALESCED_STYLE_SCHEDULER =\n    new InjectionToken<_CoalescedStyleScheduler>('_COALESCED_STYLE_SCHEDULER');\n\n/**\n * Allows grouping up CSSDom mutations after the current execution context.\n * This can significantly improve performance when separate consecutive functions are\n * reading from the CSSDom and then mutating it.\n *\n * @docs-private\n */\n@Injectable()\nexport class _CoalescedStyleScheduler implements OnDestroy {\n  private _currentSchedule: _Schedule|null = null;\n  private readonly _destroyed = new Subject<void>();\n\n  constructor(private readonly _ngZone: NgZone) {}\n\n  /**\n   * Schedules the specified task to run at the end of the current VM turn.\n   */\n  schedule(task: () => unknown): void {\n    this._createScheduleIfNeeded();\n\n    this._currentSchedule!.tasks.push(task);\n  }\n\n  /**\n   * Schedules the specified task to run after other scheduled tasks at the end of the current\n   * VM turn.\n   */\n  scheduleEnd(task: () => unknown): void {\n    this._createScheduleIfNeeded();\n\n    this._currentSchedule!.endTasks.push(task);\n  }\n\n  /** Prevent any further tasks from running. */\n  ngOnDestroy() {\n    this._destroyed.next();\n    this._destroyed.complete();\n  }\n\n  private _createScheduleIfNeeded() {\n    if (this._currentSchedule) { return; }\n\n    this._currentSchedule = new _Schedule();\n\n    this._getScheduleObservable().pipe(\n        takeUntil(this._destroyed),\n    ).subscribe(() => {\n      while (this._currentSchedule!.tasks.length || this._currentSchedule!.endTasks.length) {\n        const schedule = this._currentSchedule!;\n\n        // Capture new tasks scheduled by the current set of tasks.\n        this._currentSchedule = new _Schedule();\n\n        for (const task of schedule.tasks) {\n          task();\n        }\n\n        for (const task of schedule.endTasks) {\n          task();\n        }\n      }\n\n      this._currentSchedule = null;\n    });\n  }\n\n  private _getScheduleObservable() {\n    // Use onStable when in the context of an ongoing change detection cycle so that we\n    // do not accidentally trigger additional cycles.\n    return this._ngZone.isStable ?\n        from(Promise.resolve(undefined)) :\n        this._ngZone.onStable.pipe(take(1));\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {BooleanInput} from '@angular/cdk/coercion';\nimport {\n  ChangeDetectionStrategy,\n  Component,\n  Directive,\n  IterableChanges,\n  IterableDiffer,\n  IterableDiffers,\n  OnChanges,\n  OnDestroy,\n  SimpleChanges,\n  TemplateRef,\n  ViewContainerRef,\n  ViewEncapsulation,\n  Inject,\n  Optional\n} from '@angular/core';\nimport {CanStick, CanStickCtor, mixinHasStickyInput} from './can-stick';\nimport {CdkCellDef, CdkColumnDef} from './cell';\nimport {CDK_TABLE} from './tokens';\n\n/**\n * The row template that can be used by the mat-table. Should not be used outside of the\n * material library.\n */\nexport const CDK_ROW_TEMPLATE = `<ng-container cdkCellOutlet></ng-container>`;\n\n/**\n * Base class for the CdkHeaderRowDef and CdkRowDef that handles checking their columns inputs\n * for changes and notifying the table.\n */\n@Directive()\nexport abstract class BaseRowDef implements OnChanges {\n  /** The columns to be displayed on this row. */\n  columns: Iterable<string>;\n\n  /** Differ used to check if any changes were made to the columns. */\n  protected _columnsDiffer: IterableDiffer<any>;\n\n  constructor(\n      /** @docs-private */ public template: TemplateRef<any>, protected _differs: IterableDiffers) {\n  }\n\n  ngOnChanges(changes: SimpleChanges): void {\n    // Create a new columns differ if one does not yet exist. Initialize it based on initial value\n    // of the columns property or an empty array if none is provided.\n    if (!this._columnsDiffer) {\n      const columns = (changes['columns'] && changes['columns'].currentValue) || [];\n      this._columnsDiffer = this._differs.find(columns).create();\n      this._columnsDiffer.diff(columns);\n    }\n  }\n\n  /**\n   * Returns the difference between the current columns and the columns from the last diff, or null\n   * if there is no difference.\n   */\n  getColumnsDiff(): IterableChanges<any>|null {\n    return this._columnsDiffer.diff(this.columns);\n  }\n\n  /** Gets this row def's relevant cell template from the provided column def. */\n  extractCellTemplate(column: CdkColumnDef): TemplateRef<any> {\n    if (this instanceof CdkHeaderRowDef) {\n      return column.headerCell.template;\n    }\n    if (this instanceof CdkFooterRowDef) {\n      return column.footerCell.template;\n    } else {\n      return column.cell.template;\n    }\n  }\n}\n\n// Boilerplate for applying mixins to CdkHeaderRowDef.\n/** @docs-private */\nclass CdkHeaderRowDefBase extends BaseRowDef {}\nconst _CdkHeaderRowDefBase: CanStickCtor&typeof CdkHeaderRowDefBase =\n    mixinHasStickyInput(CdkHeaderRowDefBase);\n\n/**\n * Header row definition for the CDK table.\n * Captures the header row's template and other header properties such as the columns to display.\n */\n@Directive({\n  selector: '[cdkHeaderRowDef]',\n  inputs: ['columns: cdkHeaderRowDef', 'sticky: cdkHeaderRowDefSticky'],\n})\nexport class CdkHeaderRowDef extends _CdkHeaderRowDefBase implements CanStick, OnChanges {\n  constructor(\n    template: TemplateRef<any>,\n    _differs: IterableDiffers,\n    @Inject(CDK_TABLE) @Optional() public _table?: any) {\n    super(template, _differs);\n  }\n\n  // Prerender fails to recognize that ngOnChanges in a part of this class through inheritance.\n  // Explicitly define it so that the method is called as part of the Angular lifecycle.\n  ngOnChanges(changes: SimpleChanges): void {\n    super.ngOnChanges(changes);\n  }\n\n  static ngAcceptInputType_sticky: BooleanInput;\n}\n\n// Boilerplate for applying mixins to CdkFooterRowDef.\n/** @docs-private */\nclass CdkFooterRowDefBase extends BaseRowDef {}\nconst _CdkFooterRowDefBase: CanStickCtor&typeof CdkFooterRowDefBase =\n    mixinHasStickyInput(CdkFooterRowDefBase);\n\n/**\n * Footer row definition for the CDK table.\n * Captures the footer row's template and other footer properties such as the columns to display.\n */\n@Directive({\n  selector: '[cdkFooterRowDef]',\n  inputs: ['columns: cdkFooterRowDef', 'sticky: cdkFooterRowDefSticky'],\n})\nexport class CdkFooterRowDef extends _CdkFooterRowDefBase implements CanStick, OnChanges {\n  constructor(\n    template: TemplateRef<any>,\n    _differs: IterableDiffers,\n    @Inject(CDK_TABLE) @Optional() public _table?: any) {\n    super(template, _differs);\n  }\n\n  // Prerender fails to recognize that ngOnChanges in a part of this class through inheritance.\n  // Explicitly define it so that the method is called as part of the Angular lifecycle.\n  ngOnChanges(changes: SimpleChanges): void {\n    super.ngOnChanges(changes);\n  }\n\n  static ngAcceptInputType_sticky: BooleanInput;\n}\n\n/**\n * Data row definition for the CDK table.\n * Captures the header row's template and other row properties such as the columns to display and\n * a when predicate that describes when this row should be used.\n */\n@Directive({\n  selector: '[cdkRowDef]',\n  inputs: ['columns: cdkRowDefColumns', 'when: cdkRowDefWhen'],\n})\nexport class CdkRowDef<T> extends BaseRowDef {\n  /**\n   * Function that should return true if this row template should be used for the provided index\n   * and row data. If left undefined, this row will be considered the default row template to use\n   * when no other when functions return true for the data.\n   * For every row, there must be at least one when function that passes or an undefined to default.\n   */\n  when: (index: number, rowData: T) => boolean;\n\n  // TODO(andrewseguin): Add an input for providing a switch function to determine\n  //   if this template should be used.\n  constructor(\n    template: TemplateRef<any>,\n    _differs: IterableDiffers,\n    @Inject(CDK_TABLE) @Optional() public _table?: any) {\n    super(template, _differs);\n  }\n}\n\n/** Context provided to the row cells when `multiTemplateDataRows` is false */\nexport interface CdkCellOutletRowContext<T> {\n  /** Data for the row that this cell is located within. */\n  $implicit?: T;\n\n  /** Index of the data object in the provided data array. */\n  index?: number;\n\n  /** Length of the number of total rows. */\n  count?: number;\n\n  /** True if this cell is contained in the first row. */\n  first?: boolean;\n\n  /** True if this cell is contained in the last row. */\n  last?: boolean;\n\n  /** True if this cell is contained in a row with an even-numbered index. */\n  even?: boolean;\n\n  /** True if this cell is contained in a row with an odd-numbered index. */\n  odd?: boolean;\n}\n\n/**\n * Context provided to the row cells when `multiTemplateDataRows` is true. This context is the same\n * as CdkCellOutletRowContext except that the single `index` value is replaced by `dataIndex` and\n * `renderIndex`.\n */\nexport interface CdkCellOutletMultiRowContext<T> {\n  /** Data for the row that this cell is located within. */\n  $implicit?: T;\n\n  /** Index of the data object in the provided data array. */\n  dataIndex?: number;\n\n  /** Index location of the rendered row that this cell is located within. */\n  renderIndex?: number;\n\n  /** Length of the number of total rows. */\n  count?: number;\n\n  /** True if this cell is contained in the first row. */\n  first?: boolean;\n\n  /** True if this cell is contained in the last row. */\n  last?: boolean;\n\n  /** True if this cell is contained in a row with an even-numbered index. */\n  even?: boolean;\n\n  /** True if this cell is contained in a row with an odd-numbered index. */\n  odd?: boolean;\n}\n\n/**\n * Outlet for rendering cells inside of a row or header row.\n * @docs-private\n */\n@Directive({selector: '[cdkCellOutlet]'})\nexport class CdkCellOutlet implements OnDestroy {\n  /** The ordered list of cells to render within this outlet's view container */\n  cells: CdkCellDef[];\n\n  /** The data context to be provided to each cell */\n  context: any;\n\n  /**\n   * Static property containing the latest constructed instance of this class.\n   * Used by the CDK table when each CdkHeaderRow and CdkRow component is created using\n   * createEmbeddedView. After one of these components are created, this property will provide\n   * a handle to provide that component's cells and context. After init, the CdkCellOutlet will\n   * construct the cells with the provided context.\n   */\n  static mostRecentCellOutlet: CdkCellOutlet|null = null;\n\n  constructor(public _viewContainer: ViewContainerRef) {\n    CdkCellOutlet.mostRecentCellOutlet = this;\n  }\n\n  ngOnDestroy() {\n    // If this was the last outlet being rendered in the view, remove the reference\n    // from the static property after it has been destroyed to avoid leaking memory.\n    if (CdkCellOutlet.mostRecentCellOutlet === this) {\n      CdkCellOutlet.mostRecentCellOutlet = null;\n    }\n  }\n}\n\n/** Header template container that contains the cell outlet. Adds the right class and role. */\n@Component({\n  selector: 'cdk-header-row, tr[cdk-header-row]',\n  template: CDK_ROW_TEMPLATE,\n  host: {\n    'class': 'cdk-header-row',\n    'role': 'row',\n  },\n  // See note on CdkTable for explanation on why this uses the default change detection strategy.\n  // tslint:disable-next-line:validate-decorators\n  changeDetection: ChangeDetectionStrategy.Default,\n  encapsulation: ViewEncapsulation.None,\n})\nexport class CdkHeaderRow {\n}\n\n\n/** Footer template container that contains the cell outlet. Adds the right class and role. */\n@Component({\n  selector: 'cdk-footer-row, tr[cdk-footer-row]',\n  template: CDK_ROW_TEMPLATE,\n  host: {\n    'class': 'cdk-footer-row',\n    'role': 'row',\n  },\n  // See note on CdkTable for explanation on why this uses the default change detection strategy.\n  // tslint:disable-next-line:validate-decorators\n  changeDetection: ChangeDetectionStrategy.Default,\n  encapsulation: ViewEncapsulation.None,\n})\nexport class CdkFooterRow {\n}\n\n/** Data row template container that contains the cell outlet. Adds the right class and role. */\n@Component({\n  selector: 'cdk-row, tr[cdk-row]',\n  template: CDK_ROW_TEMPLATE,\n  host: {\n    'class': 'cdk-row',\n    'role': 'row',\n  },\n  // See note on CdkTable for explanation on why this uses the default change detection strategy.\n  // tslint:disable-next-line:validate-decorators\n  changeDetection: ChangeDetectionStrategy.Default,\n  encapsulation: ViewEncapsulation.None,\n})\nexport class CdkRow {\n}\n\n/** Row that can be used to display a message when no data is shown in the table. */\n@Directive({\n  selector: 'ng-template[cdkNoDataRow]'\n})\nexport class CdkNoDataRow {\n  constructor(public templateRef: TemplateRef<any>) {}\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * Directions that can be used when setting sticky positioning.\n * @docs-private\n */\nimport {Direction} from '@angular/cdk/bidi';\nimport {_CoalescedStyleScheduler} from './coalesced-style-scheduler';\n\nexport type StickyDirection = 'top' | 'bottom' | 'left' | 'right';\n\n/**\n * List of all possible directions that can be used for sticky positioning.\n * @docs-private\n */\nexport const STICKY_DIRECTIONS: StickyDirection[] = ['top', 'bottom', 'left', 'right'];\n\n\n/**\n * Applies and removes sticky positioning styles to the `CdkTable` rows and columns cells.\n * @docs-private\n */\nexport class StickyStyler {\n  /**\n   * @param _isNativeHtmlTable Whether the sticky logic should be based on a table\n   *     that uses the native `<table>` element.\n   * @param _stickCellCss The CSS class that will be applied to every row/cell that has\n   *     sticky positioning applied.\n   * @param direction The directionality context of the table (ltr/rtl); affects column positioning\n   *     by reversing left/right positions.\n   * @param _isBrowser Whether the table is currently being rendered on the server or the client.\n   * @param _needsPositionStickyOnElement Whether we need to specify position: sticky on cells\n   *     using inline styles. If false, it is assumed that position: sticky is included in\n   *     the component stylesheet for _stickCellCss.\n   */\n  constructor(private _isNativeHtmlTable: boolean,\n              private _stickCellCss: string,\n              public direction: Direction,\n              /**\n               * @deprecated `_coalescedStyleScheduler` parameter to become required.\n               * @breaking-change 11.0.0\n               */\n              private _coalescedStyleScheduler?: _CoalescedStyleScheduler,\n              private _isBrowser = true,\n              private readonly _needsPositionStickyOnElement = true) { }\n\n  /**\n   * Clears the sticky positioning styles from the row and its cells by resetting the `position`\n   * style, setting the zIndex to 0, and unsetting each provided sticky direction.\n   * @param rows The list of rows that should be cleared from sticking in the provided directions\n   * @param stickyDirections The directions that should no longer be set as sticky on the rows.\n   */\n  clearStickyPositioning(rows: HTMLElement[], stickyDirections: StickyDirection[]) {\n    const elementsToClear: HTMLElement[] = [];\n    for (const row of rows) {\n      // If the row isn't an element (e.g. if it's an `ng-container`),\n      // it won't have inline styles or `children` so we skip it.\n      if (row.nodeType !== row.ELEMENT_NODE) {\n        continue;\n      }\n\n      elementsToClear.push(row);\n      for (let i = 0; i < row.children.length; i++) {\n        elementsToClear.push(row.children[i] as HTMLElement);\n      }\n    }\n\n    // Coalesce with sticky row/column updates (and potentially other changes like column resize).\n    this._scheduleStyleChanges(() => {\n      for (const element of elementsToClear) {\n        this._removeStickyStyle(element, stickyDirections);\n      }\n    });\n  }\n\n  /**\n   * Applies sticky left and right positions to the cells of each row according to the sticky\n   * states of the rendered column definitions.\n   * @param rows The rows that should have its set of cells stuck according to the sticky states.\n   * @param stickyStartStates A list of boolean states where each state represents whether the cell\n   *     in this index position should be stuck to the start of the row.\n   * @param stickyEndStates A list of boolean states where each state represents whether the cell\n   *     in this index position should be stuck to the end of the row.\n   */\n  updateStickyColumns(\n      rows: HTMLElement[], stickyStartStates: boolean[], stickyEndStates: boolean[]) {\n    if (!rows.length || !this._isBrowser || !(stickyStartStates.some(state => state) ||\n        stickyEndStates.some(state => state))) {\n      return;\n    }\n\n    const firstRow = rows[0];\n    const numCells = firstRow.children.length;\n    const cellWidths: number[] = this._getCellWidths(firstRow);\n\n    const startPositions = this._getStickyStartColumnPositions(cellWidths, stickyStartStates);\n    const endPositions = this._getStickyEndColumnPositions(cellWidths, stickyEndStates);\n\n    // Coalesce with sticky row updates (and potentially other changes like column resize).\n    this._scheduleStyleChanges(() => {\n      const isRtl = this.direction === 'rtl';\n      const start = isRtl ? 'right' : 'left';\n      const end = isRtl ? 'left' : 'right';\n\n      for (const row of rows) {\n        for (let i = 0; i < numCells; i++) {\n          const cell = row.children[i] as HTMLElement;\n          if (stickyStartStates[i]) {\n            this._addStickyStyle(cell, start, startPositions[i]);\n          }\n\n          if (stickyEndStates[i]) {\n            this._addStickyStyle(cell, end, endPositions[i]);\n          }\n        }\n      }\n    });\n  }\n\n  /**\n   * Applies sticky positioning to the row's cells if using the native table layout, and to the\n   * row itself otherwise.\n   * @param rowsToStick The list of rows that should be stuck according to their corresponding\n   *     sticky state and to the provided top or bottom position.\n   * @param stickyStates A list of boolean states where each state represents whether the row\n   *     should be stuck in the particular top or bottom position.\n   * @param position The position direction in which the row should be stuck if that row should be\n   *     sticky.\n   *\n   */\n  stickRows(rowsToStick: HTMLElement[], stickyStates: boolean[], position: 'top' | 'bottom') {\n    // Since we can't measure the rows on the server, we can't stick the rows properly.\n    if (!this._isBrowser) {\n      return;\n    }\n\n    // If positioning the rows to the bottom, reverse their order when evaluating the sticky\n    // position such that the last row stuck will be \"bottom: 0px\" and so on. Note that the\n    // sticky states need to be reversed as well.\n    const rows = position === 'bottom' ? rowsToStick.slice().reverse() : rowsToStick;\n    const states = position === 'bottom' ? stickyStates.slice().reverse() : stickyStates;\n\n    // Measure row heights all at once before adding sticky styles to reduce layout thrashing.\n    const stickyHeights: number[] = [];\n    const elementsToStick: HTMLElement[][] = [];\n    for (let rowIndex = 0, stickyHeight = 0; rowIndex < rows.length; rowIndex++) {\n      stickyHeights[rowIndex] = stickyHeight;\n\n      if (!states[rowIndex]) {\n        continue;\n      }\n\n      const row = rows[rowIndex];\n      elementsToStick[rowIndex] = this._isNativeHtmlTable ?\n          Array.from(row.children) as HTMLElement[] : [row];\n\n      if (rowIndex !== rows.length - 1) {\n        stickyHeight += row.getBoundingClientRect().height;\n      }\n    }\n\n    // Coalesce with other sticky row updates (top/bottom), sticky columns updates\n    // (and potentially other changes like column resize).\n    this._scheduleStyleChanges(() => {\n      for (let rowIndex = 0; rowIndex < rows.length; rowIndex++) {\n        if (!states[rowIndex]) {\n          continue;\n        }\n\n        const height = stickyHeights[rowIndex];\n        for (const element of elementsToStick[rowIndex]) {\n          this._addStickyStyle(element, position, height);\n        }\n      }\n    });\n  }\n\n  /**\n   * When using the native table in Safari, sticky footer cells do not stick. The only way to stick\n   * footer rows is to apply sticky styling to the tfoot container. This should only be done if\n   * all footer rows are sticky. If not all footer rows are sticky, remove sticky positioning from\n   * the tfoot element.\n   */\n  updateStickyFooterContainer(tableElement: Element, stickyStates: boolean[]) {\n    if (!this._isNativeHtmlTable) {\n      return;\n    }\n\n    const tfoot = tableElement.querySelector('tfoot')!;\n\n    // Coalesce with other sticky updates (and potentially other changes like column resize).\n    this._scheduleStyleChanges(() => {\n      if (stickyStates.some(state => !state)) {\n        this._removeStickyStyle(tfoot, ['bottom']);\n      } else {\n        this._addStickyStyle(tfoot, 'bottom', 0);\n      }\n    });\n  }\n\n  /**\n   * Removes the sticky style on the element by removing the sticky cell CSS class, re-evaluating\n   * the zIndex, removing each of the provided sticky directions, and removing the\n   * sticky position if there are no more directions.\n   */\n  _removeStickyStyle(element: HTMLElement, stickyDirections: StickyDirection[]) {\n    for (const dir of stickyDirections) {\n      element.style[dir] = '';\n    }\n\n    // If the element no longer has any more sticky directions, remove sticky positioning and\n    // the sticky CSS class.\n    // Short-circuit checking element.style[dir] for stickyDirections as they\n    // were already removed above.\n    const hasDirection = STICKY_DIRECTIONS.some(dir =>\n        stickyDirections.indexOf(dir) === -1 && element.style[dir]);\n    if (hasDirection) {\n      element.style.zIndex = this._getCalculatedZIndex(element);\n    } else {\n      // When not hasDirection, _getCalculatedZIndex will always return ''.\n      element.style.zIndex = '';\n      if (this._needsPositionStickyOnElement) {\n        element.style.position = '';\n      }\n      element.classList.remove(this._stickCellCss);\n    }\n  }\n\n  /**\n   * Adds the sticky styling to the element by adding the sticky style class, changing position\n   * to be sticky (and -webkit-sticky), setting the appropriate zIndex, and adding a sticky\n   * direction and value.\n   */\n  _addStickyStyle(element: HTMLElement, dir: StickyDirection, dirValue: number) {\n    element.classList.add(this._stickCellCss);\n    element.style[dir] = `${dirValue}px`;\n    element.style.zIndex = this._getCalculatedZIndex(element);\n    if (this._needsPositionStickyOnElement) {\n      element.style.cssText += 'position: -webkit-sticky; position: sticky; ';\n    }\n  }\n\n  /**\n   * Calculate what the z-index should be for the element, depending on what directions (top,\n   * bottom, left, right) have been set. It should be true that elements with a top direction\n   * should have the highest index since these are elements like a table header. If any of those\n   * elements are also sticky in another direction, then they should appear above other elements\n   * that are only sticky top (e.g. a sticky column on a sticky header). Bottom-sticky elements\n   * (e.g. footer rows) should then be next in the ordering such that they are below the header\n   * but above any non-sticky elements. Finally, left/right sticky elements (e.g. sticky columns)\n   * should minimally increment so that they are above non-sticky elements but below top and bottom\n   * elements.\n   */\n  _getCalculatedZIndex(element: HTMLElement): string {\n    const zIndexIncrements = {\n      top: 100,\n      bottom: 10,\n      left: 1,\n      right: 1,\n    };\n\n    let zIndex = 0;\n    // Use `Iterable` instead of `Array` because TypeScript, as of 3.6.3,\n    // loses the array generic type in the `for of`. But we *also* have to use `Array` because\n    // typescript won't iterate over an `Iterable` unless you compile with `--downlevelIteration`\n    for (const dir of STICKY_DIRECTIONS as Iterable<StickyDirection> & StickyDirection[]) {\n      if (element.style[dir]) {\n        zIndex += zIndexIncrements[dir];\n      }\n    }\n\n    return zIndex ? `${zIndex}` : '';\n  }\n\n  /** Gets the widths for each cell in the provided row. */\n  _getCellWidths(row: HTMLElement): number[] {\n    const cellWidths: number[] = [];\n    const firstRowCells = row.children;\n    for (let i = 0; i < firstRowCells.length; i++) {\n      let cell: HTMLElement = firstRowCells[i] as HTMLElement;\n      cellWidths.push(cell.getBoundingClientRect().width);\n    }\n\n    return cellWidths;\n  }\n\n  /**\n   * Determines the left and right positions of each sticky column cell, which will be the\n   * accumulation of all sticky column cell widths to the left and right, respectively.\n   * Non-sticky cells do not need to have a value set since their positions will not be applied.\n   */\n  _getStickyStartColumnPositions(widths: number[], stickyStates: boolean[]): number[] {\n    const positions: number[] = [];\n    let nextPosition = 0;\n\n    for (let i = 0; i < widths.length; i++) {\n      if (stickyStates[i]) {\n        positions[i] = nextPosition;\n        nextPosition += widths[i];\n      }\n    }\n\n    return positions;\n  }\n\n  /**\n   * Determines the left and right positions of each sticky column cell, which will be the\n   * accumulation of all sticky column cell widths to the left and right, respectively.\n   * Non-sticky cells do not need to have a value set since their positions will not be applied.\n   */\n  _getStickyEndColumnPositions(widths: number[], stickyStates: boolean[]): number[] {\n    const positions: number[] = [];\n    let nextPosition = 0;\n\n    for (let i = widths.length; i > 0; i--) {\n      if (stickyStates[i]) {\n        positions[i] = nextPosition;\n        nextPosition += widths[i];\n      }\n    }\n\n    return positions;\n  }\n\n  /**\n   * Schedules styles to be applied when the style scheduler deems appropriate.\n   * @breaking-change 11.0.0 This method can be removed in favor of calling\n   * `CoalescedStyleScheduler.schedule` directly once the scheduler is a required parameter.\n   */\n  private _scheduleStyleChanges(changes: () => void) {\n    if (this._coalescedStyleScheduler) {\n      this._coalescedStyleScheduler.schedule(changes);\n    } else {\n      changes();\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * Returns an error to be thrown when attempting to find an unexisting column.\n * @param id Id whose lookup failed.\n * @docs-private\n */\nexport function getTableUnknownColumnError(id: string) {\n  return Error(`Could not find column with id \"${id}\".`);\n}\n\n/**\n * Returns an error to be thrown when two column definitions have the same name.\n * @docs-private\n */\nexport function getTableDuplicateColumnNameError(name: string) {\n  return Error(`Duplicate column definition name provided: \"${name}\".`);\n}\n\n/**\n * Returns an error to be thrown when there are multiple rows that are missing a when function.\n * @docs-private\n */\nexport function getTableMultipleDefaultRowDefsError() {\n  return Error(`There can only be one default row without a when predicate function.`);\n}\n\n/**\n * Returns an error to be thrown when there are no matching row defs for a particular set of data.\n * @docs-private\n */\nexport function getTableMissingMatchingRowDefError(data: any) {\n  return Error(`Could not find a matching row definition for the` +\n      `provided row data: ${JSON.stringify(data)}`);\n}\n\n/**\n * Returns an error to be thrown when there is no row definitions present in the content.\n * @docs-private\n */\nexport function getTableMissingRowDefsError() {\n  return Error('Missing definitions for header, footer, and row; ' +\n      'cannot determine which columns should be rendered.');\n}\n\n/**\n * Returns an error to be thrown when the data source does not match the compatible types.\n * @docs-private\n */\nexport function getTableUnknownDataSourceError() {\n  return Error(`Provided data source did not match an array, Observable, or DataSource`);\n}\n\n/**\n * Returns an error to be thrown when the text column cannot find a parent table to inject.\n * @docs-private\n */\nexport function getTableTextColumnMissingParentTableError() {\n  return Error(`Text column could not find a parent table for registration.`);\n}\n\n/**\n * Returns an error to be thrown when a table text column doesn't have a name.\n * @docs-private\n */\nexport function getTableTextColumnMissingNameError() {\n  return Error(`Table text column must have a name.`);\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Direction, Directionality} from '@angular/cdk/bidi';\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {\n  CollectionViewer,\n  DataSource,\n  _DisposeViewRepeaterStrategy,\n  isDataSource,\n  _VIEW_REPEATER_STRATEGY,\n  _ViewRepeater,\n  _ViewRepeaterItemChange,\n  _ViewRepeaterItemInsertArgs,\n  _ViewRepeaterOperation,\n} from '@angular/cdk/collections';\nimport {Platform} from '@angular/cdk/platform';\nimport {DOCUMENT} from '@angular/common';\nimport {\n  AfterContentChecked,\n  Attribute,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ContentChild,\n  ContentChildren,\n  Directive,\n  ElementRef,\n  EmbeddedViewRef,\n  Inject,\n  Input,\n  IterableChangeRecord,\n  IterableDiffer,\n  IterableDiffers,\n  OnDestroy,\n  OnInit,\n  Optional,\n  QueryList,\n  TemplateRef,\n  TrackByFunction,\n  ViewChild,\n  ViewContainerRef,\n  ViewEncapsulation,\n} from '@angular/core';\nimport {\n  BehaviorSubject,\n  isObservable,\n  Observable,\n  of as observableOf,\n  Subject,\n  Subscription,\n} from 'rxjs';\nimport {takeUntil} from 'rxjs/operators';\nimport {CdkColumnDef} from './cell';\nimport {_CoalescedStyleScheduler, _COALESCED_STYLE_SCHEDULER} from './coalesced-style-scheduler';\nimport {\n  BaseRowDef,\n  CdkCellOutlet,\n  CdkCellOutletMultiRowContext,\n  CdkCellOutletRowContext,\n  CdkFooterRowDef,\n  CdkHeaderRowDef,\n  CdkNoDataRow,\n  CdkRowDef\n} from './row';\nimport {StickyStyler} from './sticky-styler';\nimport {\n  getTableDuplicateColumnNameError,\n  getTableMissingMatchingRowDefError,\n  getTableMissingRowDefsError,\n  getTableMultipleDefaultRowDefsError,\n  getTableUnknownColumnError,\n  getTableUnknownDataSourceError\n} from './table-errors';\nimport {CDK_TABLE} from './tokens';\n\n/** Interface used to provide an outlet for rows to be inserted into. */\nexport interface RowOutlet {\n  viewContainer: ViewContainerRef;\n}\n\n/**\n * Union of the types that can be set as the data source for a `CdkTable`.\n * @docs-private\n */\ntype CdkTableDataSourceInput<T> =\n    DataSource<T>|Observable<ReadonlyArray<T>|T[]>|ReadonlyArray<T>|T[];\n\n/**\n * Provides a handle for the table to grab the view container's ng-container to insert data rows.\n * @docs-private\n */\n@Directive({selector: '[rowOutlet]'})\nexport class DataRowOutlet implements RowOutlet {\n  constructor(public viewContainer: ViewContainerRef, public elementRef: ElementRef) {}\n}\n\n/**\n * Provides a handle for the table to grab the view container's ng-container to insert the header.\n * @docs-private\n */\n@Directive({selector: '[headerRowOutlet]'})\nexport class HeaderRowOutlet implements RowOutlet {\n  constructor(public viewContainer: ViewContainerRef, public elementRef: ElementRef) {}\n}\n\n/**\n * Provides a handle for the table to grab the view container's ng-container to insert the footer.\n * @docs-private\n */\n@Directive({selector: '[footerRowOutlet]'})\nexport class FooterRowOutlet implements RowOutlet {\n  constructor(public viewContainer: ViewContainerRef, public elementRef: ElementRef) {}\n}\n\n/**\n * Provides a handle for the table to grab the view\n * container's ng-container to insert the no data row.\n * @docs-private\n */\n@Directive({selector: '[noDataRowOutlet]'})\nexport class NoDataRowOutlet implements RowOutlet {\n  constructor(public viewContainer: ViewContainerRef, public elementRef: ElementRef) {}\n}\n\n/**\n * The table template that can be used by the mat-table. Should not be used outside of the\n * material library.\n * @docs-private\n */\nexport const CDK_TABLE_TEMPLATE =\n    // Note that according to MDN, the `caption` element has to be projected as the **first**\n    // element in the table. See https://developer.mozilla.org/en-US/docs/Web/HTML/Element/caption\n    `\n  <ng-content select=\"caption\"></ng-content>\n  <ng-content select=\"colgroup, col\"></ng-content>\n  <ng-container headerRowOutlet></ng-container>\n  <ng-container rowOutlet></ng-container>\n  <ng-container noDataRowOutlet></ng-container>\n  <ng-container footerRowOutlet></ng-container>\n`;\n\n/**\n * Interface used to conveniently type the possible context interfaces for the render row.\n * @docs-private\n */\nexport interface RowContext<T> extends CdkCellOutletMultiRowContext<T>,\n                                       CdkCellOutletRowContext<T> {}\n\n/**\n * Class used to conveniently type the embedded view ref for rows with a context.\n * @docs-private\n */\nabstract class RowViewRef<T> extends EmbeddedViewRef<RowContext<T>> {}\n\n/**\n * Set of properties that represents the identity of a single rendered row.\n *\n * When the table needs to determine the list of rows to render, it will do so by iterating through\n * each data object and evaluating its list of row templates to display (when multiTemplateDataRows\n * is false, there is only one template per data object). For each pair of data object and row\n * template, a `RenderRow` is added to the list of rows to render. If the data object and row\n * template pair has already been rendered, the previously used `RenderRow` is added; else a new\n * `RenderRow` is * created. Once the list is complete and all data objects have been itereated\n * through, a diff is performed to determine the changes that need to be made to the rendered rows.\n *\n * @docs-private\n */\nexport interface RenderRow<T> {\n  data: T;\n  dataIndex: number;\n  rowDef: CdkRowDef<T>;\n}\n\n/**\n * A data table that can render a header row, data rows, and a footer row.\n * Uses the dataSource input to determine the data to be rendered. The data can be provided either\n * as a data array, an Observable stream that emits the data array to render, or a DataSource with a\n * connect function that will return an Observable stream that emits the data array to render.\n */\n@Component({\n  selector: 'cdk-table, table[cdk-table]',\n  exportAs: 'cdkTable',\n  template: CDK_TABLE_TEMPLATE,\n  host: {\n    'class': 'cdk-table',\n  },\n  encapsulation: ViewEncapsulation.None,\n  // The \"OnPush\" status for the `MatTable` component is effectively a noop, so we are removing it.\n  // The view for `MatTable` consists entirely of templates declared in other views. As they are\n  // declared elsewhere, they are checked when their declaration points are checked.\n  // tslint:disable-next-line:validate-decorators\n  changeDetection: ChangeDetectionStrategy.Default,\n  providers: [\n    {provide: CDK_TABLE, useExisting: CdkTable},\n    {provide: _VIEW_REPEATER_STRATEGY, useClass: _DisposeViewRepeaterStrategy},\n    {provide: _COALESCED_STYLE_SCHEDULER, useClass: _CoalescedStyleScheduler},\n  ]\n})\nexport class CdkTable<T> implements AfterContentChecked, CollectionViewer, OnDestroy, OnInit {\n  private _document: Document;\n\n  /** Latest data provided by the data source. */\n  protected _data: T[]|ReadonlyArray<T>;\n\n  /** Subject that emits when the component has been destroyed. */\n  private _onDestroy = new Subject<void>();\n\n  /** List of the rendered rows as identified by their `RenderRow` object. */\n  private _renderRows: RenderRow<T>[];\n\n  /** Subscription that listens for the data provided by the data source. */\n  private _renderChangeSubscription: Subscription|null;\n\n  /**\n   * Map of all the user's defined columns (header, data, and footer cell template) identified by\n   * name. Collection populated by the column definitions gathered by `ContentChildren` as well as\n   * any custom column definitions added to `_customColumnDefs`.\n   */\n  private _columnDefsByName = new Map<string, CdkColumnDef>();\n\n  /**\n   * Set of all row definitions that can be used by this table. Populated by the rows gathered by\n   * using `ContentChildren` as well as any custom row definitions added to `_customRowDefs`.\n   */\n  private _rowDefs: CdkRowDef<T>[];\n\n  /**\n   * Set of all header row definitions that can be used by this table. Populated by the rows\n   * gathered by using `ContentChildren` as well as any custom row definitions added to\n   * `_customHeaderRowDefs`.\n   */\n  private _headerRowDefs: CdkHeaderRowDef[];\n\n  /**\n   * Set of all row definitions that can be used by this table. Populated by the rows gathered by\n   * using `ContentChildren` as well as any custom row definitions added to\n   * `_customFooterRowDefs`.\n   */\n  private _footerRowDefs: CdkFooterRowDef[];\n\n  /** Differ used to find the changes in the data provided by the data source. */\n  private _dataDiffer: IterableDiffer<RenderRow<T>>;\n\n  /** Stores the row definition that does not have a when predicate. */\n  private _defaultRowDef: CdkRowDef<T>|null;\n\n  /**\n   * Column definitions that were defined outside of the direct content children of the table.\n   * These will be defined when, e.g., creating a wrapper around the cdkTable that has\n   * column definitions as *its* content child.\n   */\n  private _customColumnDefs = new Set<CdkColumnDef>();\n\n  /**\n   * Data row definitions that were defined outside of the direct content children of the table.\n   * These will be defined when, e.g., creating a wrapper around the cdkTable that has\n   * built-in data rows as *its* content child.\n   */\n  private _customRowDefs = new Set<CdkRowDef<T>>();\n\n  /**\n   * Header row definitions that were defined outside of the direct content children of the table.\n   * These will be defined when, e.g., creating a wrapper around the cdkTable that has\n   * built-in header rows as *its* content child.\n   */\n  private _customHeaderRowDefs = new Set<CdkHeaderRowDef>();\n\n  /**\n   * Footer row definitions that were defined outside of the direct content children of the table.\n   * These will be defined when, e.g., creating a wrapper around the cdkTable that has a\n   * built-in footer row as *its* content child.\n   */\n  private _customFooterRowDefs = new Set<CdkFooterRowDef>();\n\n  /**\n   * Whether the header row definition has been changed. Triggers an update to the header row after\n   * content is checked. Initialized as true so that the table renders the initial set of rows.\n   */\n  private _headerRowDefChanged = true;\n\n  /**\n   * Whether the footer row definition has been changed. Triggers an update to the footer row after\n   * content is checked. Initialized as true so that the table renders the initial set of rows.\n   */\n  private _footerRowDefChanged = true;\n\n  /**\n   * Cache of the latest rendered `RenderRow` objects as a map for easy retrieval when constructing\n   * a new list of `RenderRow` objects for rendering rows. Since the new list is constructed with\n   * the cached `RenderRow` objects when possible, the row identity is preserved when the data\n   * and row template matches, which allows the `IterableDiffer` to check rows by reference\n   * and understand which rows are added/moved/removed.\n   *\n   * Implemented as a map of maps where the first key is the `data: T` object and the second is the\n   * `CdkRowDef<T>` object. With the two keys, the cache points to a `RenderRow<T>` object that\n   * contains an array of created pairs. The array is necessary to handle cases where the data\n   * array contains multiple duplicate data objects and each instantiated `RenderRow` must be\n   * stored.\n   */\n  private _cachedRenderRowsMap = new Map<T, WeakMap<CdkRowDef<T>, RenderRow<T>[]>>();\n\n  /** Whether the table is applied to a native `<table>`. */\n  private _isNativeHtmlTable: boolean;\n\n  /**\n   * Utility class that is responsible for applying the appropriate sticky positioning styles to\n   * the table's rows and cells.\n   */\n  private _stickyStyler: StickyStyler;\n\n  /**\n   * CSS class added to any row or cell that has sticky positioning applied. May be overriden by\n   * table subclasses.\n   */\n  protected stickyCssClass: string = 'cdk-table-sticky';\n\n  /**\n   * Whether to manually add positon: sticky to all sticky cell elements. Not needed if\n   * the position is set in a selector associated with the value of stickyCssClass. May be\n   * overridden by table subclasses\n   */\n  protected needsPositionStickyOnElement = true;\n\n  /** Whether the no data row is currently showing anything. */\n  private _isShowingNoDataRow = false;\n\n  /**\n   * Tracking function that will be used to check the differences in data changes. Used similarly\n   * to `ngFor` `trackBy` function. Optimize row operations by identifying a row based on its data\n   * relative to the function to know if a row should be added/removed/moved.\n   * Accepts a function that takes two parameters, `index` and `item`.\n   */\n  @Input()\n  get trackBy(): TrackByFunction<T> {\n    return this._trackByFn;\n  }\n  set trackBy(fn: TrackByFunction<T>) {\n    if ((typeof ngDevMode === 'undefined' || ngDevMode) && fn != null && typeof fn !== 'function') {\n      console.warn(`trackBy must be a function, but received ${JSON.stringify(fn)}.`);\n    }\n    this._trackByFn = fn;\n  }\n  private _trackByFn: TrackByFunction<T>;\n\n  /**\n   * The table's source of data, which can be provided in three ways (in order of complexity):\n   *   - Simple data array (each object represents one table row)\n   *   - Stream that emits a data array each time the array changes\n   *   - `DataSource` object that implements the connect/disconnect interface.\n   *\n   * If a data array is provided, the table must be notified when the array's objects are\n   * added, removed, or moved. This can be done by calling the `renderRows()` function which will\n   * render the diff since the last table render. If the data array reference is changed, the table\n   * will automatically trigger an update to the rows.\n   *\n   * When providing an Observable stream, the table will trigger an update automatically when the\n   * stream emits a new array of data.\n   *\n   * Finally, when providing a `DataSource` object, the table will use the Observable stream\n   * provided by the connect function and trigger updates when that stream emits new data array\n   * values. During the table's ngOnDestroy or when the data source is removed from the table, the\n   * table will call the DataSource's `disconnect` function (may be useful for cleaning up any\n   * subscriptions registered during the connect process).\n   */\n  @Input()\n  get dataSource(): CdkTableDataSourceInput<T> {\n    return this._dataSource;\n  }\n  set dataSource(dataSource: CdkTableDataSourceInput<T>) {\n    if (this._dataSource !== dataSource) {\n      this._switchDataSource(dataSource);\n    }\n  }\n  private _dataSource: CdkTableDataSourceInput<T>;\n\n  /**\n   * Whether to allow multiple rows per data object by evaluating which rows evaluate their 'when'\n   * predicate to true. If `multiTemplateDataRows` is false, which is the default value, then each\n   * dataobject will render the first row that evaluates its when predicate to true, in the order\n   * defined in the table, or otherwise the default row which does not have a when predicate.\n   */\n  @Input()\n  get multiTemplateDataRows(): boolean {\n    return this._multiTemplateDataRows;\n  }\n  set multiTemplateDataRows(v: boolean) {\n    this._multiTemplateDataRows = coerceBooleanProperty(v);\n\n    // In Ivy if this value is set via a static attribute (e.g. <table multiTemplateDataRows>),\n    // this setter will be invoked before the row outlet has been defined hence the null check.\n    if (this._rowOutlet && this._rowOutlet.viewContainer.length) {\n      this._forceRenderDataRows();\n      this.updateStickyColumnStyles();\n    }\n  }\n  _multiTemplateDataRows: boolean = false;\n\n  // TODO(andrewseguin): Remove max value as the end index\n  //   and instead calculate the view on init and scroll.\n  /**\n   * Stream containing the latest information on what rows are being displayed on screen.\n   * Can be used by the data source to as a heuristic of what data should be provided.\n   *\n   * @docs-private\n   */\n  viewChange: BehaviorSubject<{start: number, end: number}> =\n      new BehaviorSubject<{start: number, end: number}>({start: 0, end: Number.MAX_VALUE});\n\n  // Outlets in the table's template where the header, data rows, and footer will be inserted.\n  @ViewChild(DataRowOutlet, {static: true}) _rowOutlet: DataRowOutlet;\n  @ViewChild(HeaderRowOutlet, {static: true}) _headerRowOutlet: HeaderRowOutlet;\n  @ViewChild(FooterRowOutlet, {static: true}) _footerRowOutlet: FooterRowOutlet;\n  @ViewChild(NoDataRowOutlet, {static: true}) _noDataRowOutlet: NoDataRowOutlet;\n\n  /**\n   * The column definitions provided by the user that contain what the header, data, and footer\n   * cells should render for each column.\n   */\n  @ContentChildren(CdkColumnDef, {descendants: true}) _contentColumnDefs: QueryList<CdkColumnDef>;\n\n  /** Set of data row definitions that were provided to the table as content children. */\n  @ContentChildren(CdkRowDef, {descendants: true}) _contentRowDefs: QueryList<CdkRowDef<T>>;\n\n  /** Set of header row definitions that were provided to the table as content children. */\n  @ContentChildren(CdkHeaderRowDef, {\n    descendants: true\n  }) _contentHeaderRowDefs: QueryList<CdkHeaderRowDef>;\n\n  /** Set of footer row definitions that were provided to the table as content children. */\n  @ContentChildren(CdkFooterRowDef, {\n    descendants: true\n  }) _contentFooterRowDefs: QueryList<CdkFooterRowDef>;\n\n  /** Row definition that will only be rendered if there's no data in the table. */\n  @ContentChild(CdkNoDataRow) _noDataRow: CdkNoDataRow;\n\n  constructor(\n      protected readonly _differs: IterableDiffers,\n      protected readonly _changeDetectorRef: ChangeDetectorRef,\n      protected readonly _elementRef: ElementRef, @Attribute('role') role: string,\n      @Optional() protected readonly _dir: Directionality, @Inject(DOCUMENT) _document: any,\n      private _platform: Platform,\n\n      /**\n       * @deprecated `_coalescedStyleScheduler`, `_viewRepeater` and `_viewportRuler`\n       *    parameters to become required.\n       * @breaking-change 11.0.0\n       */\n      @Optional() @Inject(_VIEW_REPEATER_STRATEGY)\n        protected readonly _viewRepeater?: _ViewRepeater<T, RenderRow<T>, RowContext<T>>,\n      @Optional() @Inject(_COALESCED_STYLE_SCHEDULER)\n        protected readonly _coalescedStyleScheduler?: _CoalescedStyleScheduler) {\n    if (!role) {\n      this._elementRef.nativeElement.setAttribute('role', 'grid');\n    }\n\n    this._document = _document;\n    this._isNativeHtmlTable = this._elementRef.nativeElement.nodeName === 'TABLE';\n  }\n\n  ngOnInit() {\n    this._setupStickyStyler();\n\n    if (this._isNativeHtmlTable) {\n      this._applyNativeTableSections();\n    }\n\n    // Set up the trackBy function so that it uses the `RenderRow` as its identity by default. If\n    // the user has provided a custom trackBy, return the result of that function as evaluated\n    // with the values of the `RenderRow`'s data and index.\n    this._dataDiffer = this._differs.find([]).create((_i: number, dataRow: RenderRow<T>) => {\n      return this.trackBy ? this.trackBy(dataRow.dataIndex, dataRow.data) : dataRow;\n    });\n  }\n\n  ngAfterContentChecked() {\n    // Cache the row and column definitions gathered by ContentChildren and programmatic injection.\n    this._cacheRowDefs();\n    this._cacheColumnDefs();\n\n    // Make sure that the user has at least added header, footer, or data row def.\n    if (!this._headerRowDefs.length && !this._footerRowDefs.length && !this._rowDefs.length &&\n        (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw getTableMissingRowDefsError();\n    }\n\n    // Render updates if the list of columns have been changed for the header, row, or footer defs.\n    const columnsChanged = this._renderUpdatedColumns();\n    const stickyColumnStyleUpdateNeeded =\n            columnsChanged || this._headerRowDefChanged || this._footerRowDefChanged;\n\n    // If the header row definition has been changed, trigger a render to the header row.\n    if (this._headerRowDefChanged) {\n      this._forceRenderHeaderRows();\n      this._headerRowDefChanged = false;\n    }\n\n    // If the footer row definition has been changed, trigger a render to the footer row.\n    if (this._footerRowDefChanged) {\n      this._forceRenderFooterRows();\n      this._footerRowDefChanged = false;\n    }\n\n    // If there is a data source and row definitions, connect to the data source unless a\n    // connection has already been made.\n    if (this.dataSource && this._rowDefs.length > 0 && !this._renderChangeSubscription) {\n      this._observeRenderChanges();\n    } else if (stickyColumnStyleUpdateNeeded) {\n      // In the above case, _observeRenderChanges will result in updateStickyColumnStyles being\n      // called when it row data arrives. Otherwise, we need to call it proactively.\n      this.updateStickyColumnStyles();\n    }\n\n    this._checkStickyStates();\n  }\n\n  ngOnDestroy() {\n    this._rowOutlet.viewContainer.clear();\n    this._noDataRowOutlet.viewContainer.clear();\n    this._headerRowOutlet.viewContainer.clear();\n    this._footerRowOutlet.viewContainer.clear();\n\n    this._cachedRenderRowsMap.clear();\n\n    this._onDestroy.next();\n    this._onDestroy.complete();\n\n    if (isDataSource(this.dataSource)) {\n      this.dataSource.disconnect(this);\n    }\n  }\n\n  /**\n   * Renders rows based on the table's latest set of data, which was either provided directly as an\n   * input or retrieved through an Observable stream (directly or from a DataSource).\n   * Checks for differences in the data since the last diff to perform only the necessary\n   * changes (add/remove/move rows).\n   *\n   * If the table's data source is a DataSource or Observable, this will be invoked automatically\n   * each time the provided Observable stream emits a new data array. Otherwise if your data is\n   * an array, this function will need to be called to render any changes.\n   */\n  renderRows() {\n    this._renderRows = this._getAllRenderRows();\n    const changes = this._dataDiffer.diff(this._renderRows);\n    if (!changes) {\n      this._updateNoDataRow();\n      return;\n    }\n    const viewContainer = this._rowOutlet.viewContainer;\n\n    // @breaking-change 11.0.0 Remove null check for `_viewRepeater` and the\n    // `else` clause once `_viewRepeater` is turned into a required parameter.\n    if (this._viewRepeater) {\n      this._viewRepeater.applyChanges(\n          changes,\n          viewContainer,\n          (record: IterableChangeRecord<RenderRow<T>>,\n           _adjustedPreviousIndex: number|null,\n           currentIndex: number|null) => this._getEmbeddedViewArgs(record.item, currentIndex!),\n          (record) => record.item.data,\n          (change: _ViewRepeaterItemChange<RenderRow<T>, RowContext<T>>) => {\n            if (change.operation === _ViewRepeaterOperation.INSERTED && change.context) {\n              this._renderCellTemplateForItem(change.record.item.rowDef, change.context);\n            }\n          });\n    } else {\n      changes.forEachOperation(\n        (record: IterableChangeRecord<RenderRow<T>>, prevIndex: number|null,\n         currentIndex: number|null) => {\n          if (record.previousIndex == null) {\n            const renderRow = record.item;\n            const rowDef = renderRow.rowDef;\n            const context: RowContext<T> = {$implicit: renderRow.data};\n            this._renderRow(this._rowOutlet, rowDef, currentIndex!, context);\n          } else if (currentIndex == null) {\n            viewContainer.remove(prevIndex!);\n          } else {\n            const view = <RowViewRef<T>>viewContainer.get(prevIndex!);\n            viewContainer.move(view!, currentIndex);\n          }\n        });\n    }\n\n    // Update the meta context of a row's context data (index, count, first, last, ...)\n    this._updateRowIndexContext();\n\n    // Update rows that did not get added/removed/moved but may have had their identity changed,\n    // e.g. if trackBy matched data on some property but the actual data reference changed.\n    changes.forEachIdentityChange((record: IterableChangeRecord<RenderRow<T>>) => {\n      const rowView = <RowViewRef<T>>viewContainer.get(record.currentIndex!);\n      rowView.context.$implicit = record.item.data;\n    });\n\n    this._updateNoDataRow();\n    this.updateStickyColumnStyles();\n  }\n\n  /** Adds a column definition that was not included as part of the content children. */\n  addColumnDef(columnDef: CdkColumnDef) {\n    this._customColumnDefs.add(columnDef);\n  }\n\n  /** Removes a column definition that was not included as part of the content children. */\n  removeColumnDef(columnDef: CdkColumnDef) {\n    this._customColumnDefs.delete(columnDef);\n  }\n\n  /** Adds a row definition that was not included as part of the content children. */\n  addRowDef(rowDef: CdkRowDef<T>) {\n    this._customRowDefs.add(rowDef);\n  }\n\n  /** Removes a row definition that was not included as part of the content children. */\n  removeRowDef(rowDef: CdkRowDef<T>) {\n    this._customRowDefs.delete(rowDef);\n  }\n\n  /** Adds a header row definition that was not included as part of the content children. */\n  addHeaderRowDef(headerRowDef: CdkHeaderRowDef) {\n    this._customHeaderRowDefs.add(headerRowDef);\n    this._headerRowDefChanged = true;\n  }\n\n  /** Removes a header row definition that was not included as part of the content children. */\n  removeHeaderRowDef(headerRowDef: CdkHeaderRowDef) {\n    this._customHeaderRowDefs.delete(headerRowDef);\n    this._headerRowDefChanged = true;\n  }\n\n  /** Adds a footer row definition that was not included as part of the content children. */\n  addFooterRowDef(footerRowDef: CdkFooterRowDef) {\n    this._customFooterRowDefs.add(footerRowDef);\n    this._footerRowDefChanged = true;\n  }\n\n  /** Removes a footer row definition that was not included as part of the content children. */\n  removeFooterRowDef(footerRowDef: CdkFooterRowDef) {\n    this._customFooterRowDefs.delete(footerRowDef);\n    this._footerRowDefChanged = true;\n  }\n\n  /**\n   * Updates the header sticky styles. First resets all applied styles with respect to the cells\n   * sticking to the top. Then, evaluating which cells need to be stuck to the top. This is\n   * automatically called when the header row changes its displayed set of columns, or if its\n   * sticky input changes. May be called manually for cases where the cell content changes outside\n   * of these events.\n   */\n  updateStickyHeaderRowStyles(): void {\n    const headerRows = this._getRenderedRows(this._headerRowOutlet);\n    const tableElement = this._elementRef.nativeElement as HTMLElement;\n\n    // Hide the thead element if there are no header rows. This is necessary to satisfy\n    // overzealous a11y checkers that fail because the `rowgroup` element does not contain\n    // required child `row`.\n    const thead = tableElement.querySelector('thead');\n    if (thead) {\n      thead.style.display = headerRows.length ? '' : 'none';\n    }\n\n    const stickyStates = this._headerRowDefs.map(def => def.sticky);\n    this._stickyStyler.clearStickyPositioning(headerRows, ['top']);\n    this._stickyStyler.stickRows(headerRows, stickyStates, 'top');\n\n    // Reset the dirty state of the sticky input change since it has been used.\n    this._headerRowDefs.forEach(def => def.resetStickyChanged());\n  }\n\n  /**\n   * Updates the footer sticky styles. First resets all applied styles with respect to the cells\n   * sticking to the bottom. Then, evaluating which cells need to be stuck to the bottom. This is\n   * automatically called when the footer row changes its displayed set of columns, or if its\n   * sticky input changes. May be called manually for cases where the cell content changes outside\n   * of these events.\n   */\n  updateStickyFooterRowStyles(): void {\n    const footerRows = this._getRenderedRows(this._footerRowOutlet);\n    const tableElement = this._elementRef.nativeElement as HTMLElement;\n\n    // Hide the tfoot element if there are no footer rows. This is necessary to satisfy\n    // overzealous a11y checkers that fail because the `rowgroup` element does not contain\n    // required child `row`.\n    const tfoot = tableElement.querySelector('tfoot');\n    if (tfoot) {\n      tfoot.style.display = footerRows.length ? '' : 'none';\n    }\n\n    const stickyStates = this._footerRowDefs.map(def => def.sticky);\n    this._stickyStyler.clearStickyPositioning(footerRows, ['bottom']);\n    this._stickyStyler.stickRows(footerRows, stickyStates, 'bottom');\n    this._stickyStyler.updateStickyFooterContainer(this._elementRef.nativeElement, stickyStates);\n\n    // Reset the dirty state of the sticky input change since it has been used.\n    this._footerRowDefs.forEach(def => def.resetStickyChanged());\n  }\n\n  /**\n   * Updates the column sticky styles. First resets all applied styles with respect to the cells\n   * sticking to the left and right. Then sticky styles are added for the left and right according\n   * to the column definitions for each cell in each row. This is automatically called when\n   * the data source provides a new set of data or when a column definition changes its sticky\n   * input. May be called manually for cases where the cell content changes outside of these events.\n   */\n  updateStickyColumnStyles() {\n    const headerRows = this._getRenderedRows(this._headerRowOutlet);\n    const dataRows = this._getRenderedRows(this._rowOutlet);\n    const footerRows = this._getRenderedRows(this._footerRowOutlet);\n\n    // Clear the left and right positioning from all columns in the table across all rows since\n    // sticky columns span across all table sections (header, data, footer)\n    this._stickyStyler.clearStickyPositioning(\n        [...headerRows, ...dataRows, ...footerRows], ['left', 'right']);\n\n    // Update the sticky styles for each header row depending on the def's sticky state\n    headerRows.forEach((headerRow, i) => {\n      this._addStickyColumnStyles([headerRow], this._headerRowDefs[i]);\n    });\n\n    // Update the sticky styles for each data row depending on its def's sticky state\n    this._rowDefs.forEach(rowDef => {\n      // Collect all the rows rendered with this row definition.\n      const rows: HTMLElement[] = [];\n      for (let i = 0; i < dataRows.length; i++) {\n        if (this._renderRows[i].rowDef === rowDef) {\n          rows.push(dataRows[i]);\n        }\n      }\n\n      this._addStickyColumnStyles(rows, rowDef);\n    });\n\n    // Update the sticky styles for each footer row depending on the def's sticky state\n    footerRows.forEach((footerRow, i) => {\n      this._addStickyColumnStyles([footerRow], this._footerRowDefs[i]);\n    });\n\n    // Reset the dirty state of the sticky input change since it has been used.\n    Array.from(this._columnDefsByName.values()).forEach(def => def.resetStickyChanged());\n  }\n\n  /**\n   * Get the list of RenderRow objects to render according to the current list of data and defined\n   * row definitions. If the previous list already contained a particular pair, it should be reused\n   * so that the differ equates their references.\n   */\n  private _getAllRenderRows(): RenderRow<T>[] {\n    const renderRows: RenderRow<T>[] = [];\n\n    // Store the cache and create a new one. Any re-used RenderRow objects will be moved into the\n    // new cache while unused ones can be picked up by garbage collection.\n    const prevCachedRenderRows = this._cachedRenderRowsMap;\n    this._cachedRenderRowsMap = new Map();\n\n    // For each data object, get the list of rows that should be rendered, represented by the\n    // respective `RenderRow` object which is the pair of `data` and `CdkRowDef`.\n    for (let i = 0; i < this._data.length; i++) {\n      let data = this._data[i];\n      const renderRowsForData = this._getRenderRowsForData(data, i, prevCachedRenderRows.get(data));\n\n      if (!this._cachedRenderRowsMap.has(data)) {\n        this._cachedRenderRowsMap.set(data, new WeakMap());\n      }\n\n      for (let j = 0; j < renderRowsForData.length; j++) {\n        let renderRow = renderRowsForData[j];\n\n        const cache = this._cachedRenderRowsMap.get(renderRow.data)!;\n        if (cache.has(renderRow.rowDef)) {\n          cache.get(renderRow.rowDef)!.push(renderRow);\n        } else {\n          cache.set(renderRow.rowDef, [renderRow]);\n        }\n        renderRows.push(renderRow);\n      }\n    }\n\n    return renderRows;\n  }\n\n  /**\n   * Gets a list of `RenderRow<T>` for the provided data object and any `CdkRowDef` objects that\n   * should be rendered for this data. Reuses the cached RenderRow objects if they match the same\n   * `(T, CdkRowDef)` pair.\n   */\n  private _getRenderRowsForData(\n      data: T, dataIndex: number, cache?: WeakMap<CdkRowDef<T>, RenderRow<T>[]>): RenderRow<T>[] {\n    const rowDefs = this._getRowDefs(data, dataIndex);\n\n    return rowDefs.map(rowDef => {\n      const cachedRenderRows = (cache && cache.has(rowDef)) ? cache.get(rowDef)! : [];\n      if (cachedRenderRows.length) {\n        const dataRow = cachedRenderRows.shift()!;\n        dataRow.dataIndex = dataIndex;\n        return dataRow;\n      } else {\n        return {data, rowDef, dataIndex};\n      }\n    });\n  }\n\n  /** Update the map containing the content's column definitions. */\n  private _cacheColumnDefs() {\n    this._columnDefsByName.clear();\n\n    const columnDefs = mergeArrayAndSet(\n        this._getOwnDefs(this._contentColumnDefs), this._customColumnDefs);\n    columnDefs.forEach(columnDef => {\n      if (this._columnDefsByName.has(columnDef.name) &&\n        (typeof ngDevMode === 'undefined' || ngDevMode)) {\n        throw getTableDuplicateColumnNameError(columnDef.name);\n      }\n      this._columnDefsByName.set(columnDef.name, columnDef);\n    });\n  }\n\n  /** Update the list of all available row definitions that can be used. */\n  private _cacheRowDefs() {\n    this._headerRowDefs = mergeArrayAndSet(\n        this._getOwnDefs(this._contentHeaderRowDefs), this._customHeaderRowDefs);\n    this._footerRowDefs = mergeArrayAndSet(\n        this._getOwnDefs(this._contentFooterRowDefs), this._customFooterRowDefs);\n    this._rowDefs = mergeArrayAndSet(\n        this._getOwnDefs(this._contentRowDefs), this._customRowDefs);\n\n    // After all row definitions are determined, find the row definition to be considered default.\n    const defaultRowDefs = this._rowDefs.filter(def => !def.when);\n    if (!this.multiTemplateDataRows && defaultRowDefs.length > 1 &&\n        (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw getTableMultipleDefaultRowDefsError();\n    }\n    this._defaultRowDef = defaultRowDefs[0];\n  }\n\n  /**\n   * Check if the header, data, or footer rows have changed what columns they want to display or\n   * whether the sticky states have changed for the header or footer. If there is a diff, then\n   * re-render that section.\n   */\n  private _renderUpdatedColumns(): boolean {\n    const columnsDiffReducer = (acc: boolean, def: BaseRowDef) => acc || !!def.getColumnsDiff();\n\n    // Force re-render data rows if the list of column definitions have changed.\n    const dataColumnsChanged = this._rowDefs.reduce(columnsDiffReducer, false);\n    if (dataColumnsChanged) {\n      this._forceRenderDataRows();\n    }\n\n    // Force re-render header/footer rows if the list of column definitions have changed.\n    const headerColumnsChanged = this._headerRowDefs.reduce(columnsDiffReducer, false);\n    if (headerColumnsChanged) {\n      this._forceRenderHeaderRows();\n    }\n\n    const footerColumnsChanged = this._footerRowDefs.reduce(columnsDiffReducer, false);\n    if (footerColumnsChanged) {\n      this._forceRenderFooterRows();\n    }\n\n    return dataColumnsChanged || headerColumnsChanged || footerColumnsChanged;\n  }\n\n  /**\n   * Switch to the provided data source by resetting the data and unsubscribing from the current\n   * render change subscription if one exists. If the data source is null, interpret this by\n   * clearing the row outlet. Otherwise start listening for new data.\n   */\n  private _switchDataSource(dataSource: CdkTableDataSourceInput<T>) {\n    this._data = [];\n\n    if (isDataSource(this.dataSource)) {\n      this.dataSource.disconnect(this);\n    }\n\n    // Stop listening for data from the previous data source.\n    if (this._renderChangeSubscription) {\n      this._renderChangeSubscription.unsubscribe();\n      this._renderChangeSubscription = null;\n    }\n\n    if (!dataSource) {\n      if (this._dataDiffer) {\n        this._dataDiffer.diff([]);\n      }\n      this._rowOutlet.viewContainer.clear();\n    }\n\n    this._dataSource = dataSource;\n  }\n\n  /** Set up a subscription for the data provided by the data source. */\n  private _observeRenderChanges() {\n    // If no data source has been set, there is nothing to observe for changes.\n    if (!this.dataSource) {\n      return;\n    }\n\n    let dataStream: Observable<T[]|ReadonlyArray<T>>|undefined;\n\n    if (isDataSource(this.dataSource)) {\n      dataStream = this.dataSource.connect(this);\n    } else if (isObservable(this.dataSource)) {\n      dataStream = this.dataSource;\n    } else if (Array.isArray(this.dataSource)) {\n      dataStream = observableOf(this.dataSource);\n    }\n\n    if (dataStream === undefined && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw getTableUnknownDataSourceError();\n    }\n\n    this._renderChangeSubscription = dataStream!.pipe(takeUntil(this._onDestroy))\n      .subscribe(data => {\n        this._data = data || [];\n        this.renderRows();\n      });\n  }\n\n  /**\n   * Clears any existing content in the header row outlet and creates a new embedded view\n   * in the outlet using the header row definition.\n   */\n  private _forceRenderHeaderRows() {\n    // Clear the header row outlet if any content exists.\n    if (this._headerRowOutlet.viewContainer.length > 0) {\n      this._headerRowOutlet.viewContainer.clear();\n    }\n\n    this._headerRowDefs.forEach((def, i) => this._renderRow(this._headerRowOutlet, def, i));\n    this.updateStickyHeaderRowStyles();\n  }\n\n  /**\n   * Clears any existing content in the footer row outlet and creates a new embedded view\n   * in the outlet using the footer row definition.\n   */\n  private _forceRenderFooterRows() {\n    // Clear the footer row outlet if any content exists.\n    if (this._footerRowOutlet.viewContainer.length > 0) {\n      this._footerRowOutlet.viewContainer.clear();\n    }\n\n    this._footerRowDefs.forEach((def, i) => this._renderRow(this._footerRowOutlet, def, i));\n    this.updateStickyFooterRowStyles();\n  }\n\n  /** Adds the sticky column styles for the rows according to the columns' stick states. */\n  private _addStickyColumnStyles(rows: HTMLElement[], rowDef: BaseRowDef) {\n    const columnDefs = Array.from(rowDef.columns || []).map(columnName => {\n      const columnDef = this._columnDefsByName.get(columnName);\n      if (!columnDef && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n        throw getTableUnknownColumnError(columnName);\n      }\n      return columnDef!;\n    });\n    const stickyStartStates = columnDefs.map(columnDef => columnDef.sticky);\n    const stickyEndStates = columnDefs.map(columnDef => columnDef.stickyEnd);\n    this._stickyStyler.updateStickyColumns(rows, stickyStartStates, stickyEndStates);\n  }\n\n  /** Gets the list of rows that have been rendered in the row outlet. */\n  _getRenderedRows(rowOutlet: RowOutlet): HTMLElement[] {\n    const renderedRows: HTMLElement[] = [];\n\n    for (let i = 0; i < rowOutlet.viewContainer.length; i++) {\n      const viewRef = (rowOutlet.viewContainer.get(i)! as EmbeddedViewRef<any>);\n      renderedRows.push(viewRef.rootNodes[0]);\n    }\n\n    return renderedRows;\n  }\n\n  /**\n   * Get the matching row definitions that should be used for this row data. If there is only\n   * one row definition, it is returned. Otherwise, find the row definitions that has a when\n   * predicate that returns true with the data. If none return true, return the default row\n   * definition.\n   */\n  _getRowDefs(data: T, dataIndex: number): CdkRowDef<T>[] {\n    if (this._rowDefs.length == 1) {\n      return [this._rowDefs[0]];\n    }\n\n    let rowDefs: CdkRowDef<T>[] = [];\n    if (this.multiTemplateDataRows) {\n      rowDefs = this._rowDefs.filter(def => !def.when || def.when(dataIndex, data));\n    } else {\n      let rowDef =\n          this._rowDefs.find(def => def.when && def.when(dataIndex, data)) || this._defaultRowDef;\n      if (rowDef) {\n        rowDefs.push(rowDef);\n      }\n    }\n\n    if (!rowDefs.length && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw getTableMissingMatchingRowDefError(data);\n    }\n\n    return rowDefs;\n  }\n\n\n  private _getEmbeddedViewArgs(renderRow: RenderRow<T>,\n                               index: number): _ViewRepeaterItemInsertArgs<RowContext<T>> {\n    const rowDef = renderRow.rowDef;\n    const context: RowContext<T> = {$implicit: renderRow.data};\n    return {\n      templateRef: rowDef.template,\n      context,\n      index,\n    };\n  }\n\n  /**\n   * Creates a new row template in the outlet and fills it with the set of cell templates.\n   * Optionally takes a context to provide to the row and cells, as well as an optional index\n   * of where to place the new row template in the outlet.\n   */\n  private _renderRow(\n      outlet: RowOutlet, rowDef: BaseRowDef, index: number,\n      context: RowContext<T> = {}): EmbeddedViewRef<RowContext<T>> {\n    // TODO(andrewseguin): enforce that one outlet was instantiated from createEmbeddedView\n    const view = outlet.viewContainer.createEmbeddedView(rowDef.template, context, index);\n    this._renderCellTemplateForItem(rowDef, context);\n    return view;\n  }\n\n  private _renderCellTemplateForItem(rowDef: BaseRowDef, context: RowContext<T>) {\n    for (let cellTemplate of this._getCellTemplates(rowDef)) {\n      if (CdkCellOutlet.mostRecentCellOutlet) {\n        CdkCellOutlet.mostRecentCellOutlet._viewContainer.createEmbeddedView(cellTemplate, context);\n      }\n    }\n\n    this._changeDetectorRef.markForCheck();\n  }\n\n  /**\n   * Updates the index-related context for each row to reflect any changes in the index of the rows,\n   * e.g. first/last/even/odd.\n   */\n  private _updateRowIndexContext() {\n    const viewContainer = this._rowOutlet.viewContainer;\n    for (let renderIndex = 0, count = viewContainer.length; renderIndex < count; renderIndex++) {\n      const viewRef = viewContainer.get(renderIndex) as RowViewRef<T>;\n      const context = viewRef.context as RowContext<T>;\n      context.count = count;\n      context.first = renderIndex === 0;\n      context.last = renderIndex === count - 1;\n      context.even = renderIndex % 2 === 0;\n      context.odd = !context.even;\n\n      if (this.multiTemplateDataRows) {\n        context.dataIndex = this._renderRows[renderIndex].dataIndex;\n        context.renderIndex = renderIndex;\n      } else {\n        context.index = this._renderRows[renderIndex].dataIndex;\n      }\n    }\n  }\n\n  /** Gets the column definitions for the provided row def. */\n  private _getCellTemplates(rowDef: BaseRowDef): TemplateRef<any>[] {\n    if (!rowDef || !rowDef.columns) {\n      return [];\n    }\n    return Array.from(rowDef.columns, columnId => {\n      const column = this._columnDefsByName.get(columnId);\n\n      if (!column && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n        throw getTableUnknownColumnError(columnId);\n      }\n\n      return rowDef.extractCellTemplate(column!);\n    });\n  }\n\n  /** Adds native table sections (e.g. tbody) and moves the row outlets into them. */\n  private _applyNativeTableSections() {\n    const documentFragment = this._document.createDocumentFragment();\n    const sections = [\n      {tag: 'thead', outlets: [this._headerRowOutlet]},\n      {tag: 'tbody', outlets: [this._rowOutlet, this._noDataRowOutlet]},\n      {tag: 'tfoot', outlets: [this._footerRowOutlet]},\n    ];\n\n    for (const section of sections) {\n      const element = this._document.createElement(section.tag);\n      element.setAttribute('role', 'rowgroup');\n\n      for (const outlet of section.outlets) {\n        element.appendChild(outlet.elementRef.nativeElement);\n      }\n\n      documentFragment.appendChild(element);\n    }\n\n    // Use a DocumentFragment so we don't hit the DOM on each iteration.\n    this._elementRef.nativeElement.appendChild(documentFragment);\n  }\n\n  /**\n   * Forces a re-render of the data rows. Should be called in cases where there has been an input\n   * change that affects the evaluation of which rows should be rendered, e.g. toggling\n   * `multiTemplateDataRows` or adding/removing row definitions.\n   */\n  private _forceRenderDataRows() {\n    this._dataDiffer.diff([]);\n    this._rowOutlet.viewContainer.clear();\n    this.renderRows();\n  }\n\n  /**\n   * Checks if there has been a change in sticky states since last check and applies the correct\n   * sticky styles. Since checking resets the \"dirty\" state, this should only be performed once\n   * during a change detection and after the inputs are settled (after content check).\n   */\n  private _checkStickyStates() {\n    const stickyCheckReducer = (acc: boolean,\n                                d: CdkHeaderRowDef|CdkFooterRowDef|CdkColumnDef) => {\n      return acc || d.hasStickyChanged();\n    };\n\n    // Note that the check needs to occur for every definition since it notifies the definition\n    // that it can reset its dirty state. Using another operator like `some` may short-circuit\n    // remaining definitions and leave them in an unchecked state.\n\n    if (this._headerRowDefs.reduce(stickyCheckReducer, false)) {\n      this.updateStickyHeaderRowStyles();\n    }\n\n    if (this._footerRowDefs.reduce(stickyCheckReducer, false)) {\n      this.updateStickyFooterRowStyles();\n    }\n\n    if (Array.from(this._columnDefsByName.values()).reduce(stickyCheckReducer, false)) {\n      this.updateStickyColumnStyles();\n    }\n  }\n\n  /**\n   * Creates the sticky styler that will be used for sticky rows and columns. Listens\n   * for directionality changes and provides the latest direction to the styler. Re-applies column\n   * stickiness when directionality changes.\n   */\n  private _setupStickyStyler() {\n    const direction: Direction = this._dir ? this._dir.value : 'ltr';\n    this._stickyStyler = new StickyStyler(\n        this._isNativeHtmlTable, this.stickyCssClass, direction, this._coalescedStyleScheduler,\n        this._platform.isBrowser, this.needsPositionStickyOnElement);\n    (this._dir ? this._dir.change : observableOf<Direction>())\n    .pipe(takeUntil(this._onDestroy))\n    .subscribe(value => {\n      this._stickyStyler.direction = value;\n      this.updateStickyColumnStyles();\n    });\n  }\n\n  /** Filters definitions that belong to this table from a QueryList. */\n  private _getOwnDefs<I extends {_table?: any}>(items: QueryList<I>): I[] {\n    return items.filter(item => !item._table || item._table === this);\n  }\n\n  /** Creates or removes the no data row, depending on whether any data is being shown. */\n  private _updateNoDataRow() {\n    if (this._noDataRow) {\n      const shouldShow = this._rowOutlet.viewContainer.length === 0;\n\n      if (shouldShow !== this._isShowingNoDataRow) {\n        const container = this._noDataRowOutlet.viewContainer;\n        shouldShow ? container.createEmbeddedView(this._noDataRow.templateRef) : container.clear();\n        this._isShowingNoDataRow = shouldShow;\n      }\n    }\n  }\n\n  static ngAcceptInputType_multiTemplateDataRows: BooleanInput;\n}\n\n/** Utility function that gets a merged list of the entries in an array and values of a Set. */\nfunction mergeArrayAndSet<T>(array: T[], set: Set<T>): T[] {\n  return array.concat(Array.from(set));\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  ChangeDetectionStrategy,\n  Component,\n  Inject,\n  Input,\n  OnDestroy,\n  OnInit,\n  Optional,\n  ViewChild,\n  ViewEncapsulation,\n} from '@angular/core';\nimport {CdkCellDef, CdkColumnDef, CdkHeaderCellDef} from './cell';\nimport {CdkTable} from './table';\nimport {\n  getTableTextColumnMissingParentTableError,\n  getTableTextColumnMissingNameError,\n} from './table-errors';\nimport {TEXT_COLUMN_OPTIONS, TextColumnOptions} from './tokens';\n\n\n/**\n * Column that simply shows text content for the header and row cells. Assumes that the table\n * is using the native table implementation (`<table>`).\n *\n * By default, the name of this column will be the header text and data property accessor.\n * The header text can be overridden with the `headerText` input. Cell values can be overridden with\n * the `dataAccessor` input. Change the text justification to the start or end using the `justify`\n * input.\n */\n@Component({\n  selector: 'cdk-text-column',\n  template: `\n    <ng-container cdkColumnDef>\n      <th cdk-header-cell *cdkHeaderCellDef [style.text-align]=\"justify\">\n        {{headerText}}\n      </th>\n      <td cdk-cell *cdkCellDef=\"let data\" [style.text-align]=\"justify\">\n        {{dataAccessor(data, name)}}\n      </td>\n    </ng-container>\n  `,\n  encapsulation: ViewEncapsulation.None,\n  // Change detection is intentionally not set to OnPush. This component's template will be provided\n  // to the table to be inserted into its view. This is problematic when change detection runs since\n  // the bindings in this template will be evaluated _after_ the table's view is evaluated, which\n  // mean's the template in the table's view will not have the updated value (and in fact will cause\n  // an ExpressionChangedAfterItHasBeenCheckedError).\n  // tslint:disable-next-line:validate-decorators\n  changeDetection: ChangeDetectionStrategy.Default,\n})\nexport class CdkTextColumn<T> implements OnDestroy, OnInit {\n  /** Column name that should be used to reference this column. */\n  @Input()\n  get name(): string {\n    return this._name;\n  }\n  set name(name: string) {\n    this._name = name;\n\n    // With Ivy, inputs can be initialized before static query results are\n    // available. In that case, we defer the synchronization until \"ngOnInit\" fires.\n    this._syncColumnDefName();\n  }\n  _name: string;\n\n  /**\n   * Text label that should be used for the column header. If this property is not\n   * set, the header text will default to the column name with its first letter capitalized.\n   */\n  @Input() headerText: string;\n\n  /**\n   * Accessor function to retrieve the data rendered for each cell. If this\n   * property is not set, the data cells will render the value found in the data's property matching\n   * the column's name. For example, if the column is named `id`, then the rendered value will be\n   * value defined by the data's `id` property.\n   */\n  @Input() dataAccessor: (data: T, name: string) => string;\n\n  /** Alignment of the cell values. */\n  @Input() justify: 'start'|'end' = 'start';\n\n  /** @docs-private */\n  @ViewChild(CdkColumnDef, {static: true}) columnDef: CdkColumnDef;\n\n  /**\n   * The column cell is provided to the column during `ngOnInit` with a static query.\n   * Normally, this will be retrieved by the column using `ContentChild`, but that assumes the\n   * column definition was provided in the same view as the table, which is not the case with this\n   * component.\n   * @docs-private\n   */\n  @ViewChild(CdkCellDef, {static: true}) cell: CdkCellDef;\n\n  /**\n   * The column headerCell is provided to the column during `ngOnInit` with a static query.\n   * Normally, this will be retrieved by the column using `ContentChild`, but that assumes the\n   * column definition was provided in the same view as the table, which is not the case with this\n   * component.\n   * @docs-private\n   */\n  @ViewChild(CdkHeaderCellDef, {static: true}) headerCell: CdkHeaderCellDef;\n\n  constructor(\n      // `CdkTextColumn` is always requiring a table, but we just assert it manually\n      // for better error reporting.\n      // tslint:disable-next-line: lightweight-tokens\n      @Optional() private _table: CdkTable<T>,\n      @Optional() @Inject(TEXT_COLUMN_OPTIONS) private _options: TextColumnOptions<T>) {\n    this._options = _options || {};\n  }\n\n  ngOnInit() {\n    this._syncColumnDefName();\n\n    if (this.headerText === undefined) {\n      this.headerText = this._createDefaultHeaderText();\n    }\n\n    if (!this.dataAccessor) {\n      this.dataAccessor =\n          this._options.defaultDataAccessor || ((data: T, name: string) => (data as any)[name]);\n    }\n\n    if (this._table) {\n      // Provide the cell and headerCell directly to the table with the static `ViewChild` query,\n      // since the columnDef will not pick up its content by the time the table finishes checking\n      // its content and initializing the rows.\n      this.columnDef.cell = this.cell;\n      this.columnDef.headerCell = this.headerCell;\n      this._table.addColumnDef(this.columnDef);\n    } else if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      throw getTableTextColumnMissingParentTableError();\n    }\n  }\n\n  ngOnDestroy() {\n    if (this._table) {\n      this._table.removeColumnDef(this.columnDef);\n    }\n  }\n\n  /**\n   * Creates a default header text. Use the options' header text transformation function if one\n   * has been provided. Otherwise simply capitalize the column name.\n   */\n  _createDefaultHeaderText() {\n    const name = this.name;\n\n    if (!name && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw getTableTextColumnMissingNameError();\n    }\n\n    if (this._options && this._options.defaultHeaderTextTransform) {\n      return this._options.defaultHeaderTextTransform(name);\n    }\n\n    return name[0].toUpperCase() + name.slice(1);\n  }\n\n  /** Synchronizes the column definition name with the text column name. */\n  private _syncColumnDefName() {\n    if (this.columnDef) {\n      this.columnDef.name = this.name;\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgModule} from '@angular/core';\nimport {HeaderRowOutlet, DataRowOutlet, CdkTable, FooterRowOutlet, NoDataRowOutlet} from './table';\nimport {\n  CdkCellOutlet, CdkFooterRow, CdkFooterRowDef, CdkHeaderRow, CdkHeaderRowDef, CdkRow,\n  CdkRowDef,\n  CdkNoDataRow\n} from './row';\nimport {\n  CdkColumnDef, CdkHeaderCellDef, CdkHeaderCell, CdkCell, CdkCellDef,\n  CdkFooterCellDef, CdkFooterCell\n} from './cell';\nimport {CdkTextColumn} from './text-column';\nimport {ScrollingModule} from '@angular/cdk/scrolling';\n\nconst EXPORTED_DECLARATIONS = [\n  CdkTable,\n  CdkRowDef,\n  CdkCellDef,\n  CdkCellOutlet,\n  CdkHeaderCellDef,\n  CdkFooterCellDef,\n  CdkColumnDef,\n  CdkCell,\n  CdkRow,\n  CdkHeaderCell,\n  CdkFooterCell,\n  CdkHeaderRow,\n  CdkHeaderRowDef,\n  CdkFooterRow,\n  CdkFooterRowDef,\n  DataRowOutlet,\n  HeaderRowOutlet,\n  FooterRowOutlet,\n  CdkTextColumn,\n  CdkNoDataRow,\n  NoDataRowOutlet,\n];\n\n@NgModule({\n  exports: EXPORTED_DECLARATIONS,\n  declarations: EXPORTED_DECLARATIONS,\n  imports: [ScrollingModule]\n})\nexport class CdkTableModule { }\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './table';\nexport * from './cell';\nexport * from './coalesced-style-scheduler';\nexport * from './row';\nexport * from './table-module';\nexport * from './sticky-styler';\nexport * from './can-stick';\nexport * from './text-column';\nexport * from './tokens';\n\n/** Re-export DataSource for a more intuitive experience for users of just the table. */\nexport {DataSource} from '@angular/cdk/collections';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar timeout_1 = require(\"../../operator/timeout\");\nrxjs_1.Observable.prototype.timeout = timeout_1.timeout;\n//# sourceMappingURL=timeout.js.map","import { isArray } from '../util/isArray';\nimport { CombineLatestOperator } from '../observable/combineLatest';\nimport { from } from '../observable/from';\nconst none = {};\nexport function combineLatest(...observables) {\n    let project = null;\n    if (typeof observables[observables.length - 1] === 'function') {\n        project = observables.pop();\n    }\n    if (observables.length === 1 && isArray(observables[0])) {\n        observables = observables[0].slice();\n    }\n    return (source) => source.lift.call(from([source, ...observables]), new CombineLatestOperator(project));\n}\n//# sourceMappingURL=combineLatest.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Returns an Observable that skips the first `count` items emitted by the source Observable.\n *\n * <img src=\"./img/skip.png\" width=\"100%\">\n *\n * @param {Number} count - The number of times, items emitted by source Observable should be skipped.\n * @return {Observable} An Observable that skips values emitted by the source Observable.\n *\n * @method skip\n * @owner Observable\n */\nfunction skip(count) {\n    return operators_1.skip(count)(this);\n}\nexports.skip = skip;\n//# sourceMappingURL=skip.js.map","/**\n * @license Angular v10.1.3\n * (c) 2010-2020 Google LLC. https://angular.io/\n * License: MIT\n */\n\nimport { Subject, Subscription, Observable, merge as merge$1 } from 'rxjs';\nimport { share } from 'rxjs/operators';\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Convince closure compiler that the wrapped function has no side-effects.\n *\n * Closure compiler always assumes that `toString` has no side-effects. We use this quirk to\n * allow us to execute a function but have closure compiler mark the call as no-side-effects.\n * It is important that the return value for the `noSideEffects` function be assigned\n * to something which is retained otherwise the call to `noSideEffects` will be removed by closure\n * compiler.\n */\nfunction noSideEffects(fn) {\n    return { toString: fn }.toString();\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst ANNOTATIONS = '__annotations__';\nconst PARAMETERS = '__parameters__';\nconst PROP_METADATA = '__prop__metadata__';\n/**\n * @suppress {globalThis}\n */\nfunction makeDecorator(name, props, parentClass, additionalProcessing, typeFn) {\n    return noSideEffects(() => {\n        const metaCtor = makeMetadataCtor(props);\n        function DecoratorFactory(...args) {\n            if (this instanceof DecoratorFactory) {\n                metaCtor.call(this, ...args);\n                return this;\n            }\n            const annotationInstance = new DecoratorFactory(...args);\n            return function TypeDecorator(cls) {\n                if (typeFn)\n                    typeFn(cls, ...args);\n                // Use of Object.defineProperty is important since it creates non-enumerable property which\n                // prevents the property is copied during subclassing.\n                const annotations = cls.hasOwnProperty(ANNOTATIONS) ?\n                    cls[ANNOTATIONS] :\n                    Object.defineProperty(cls, ANNOTATIONS, { value: [] })[ANNOTATIONS];\n                annotations.push(annotationInstance);\n                if (additionalProcessing)\n                    additionalProcessing(cls);\n                return cls;\n            };\n        }\n        if (parentClass) {\n            DecoratorFactory.prototype = Object.create(parentClass.prototype);\n        }\n        DecoratorFactory.prototype.ngMetadataName = name;\n        DecoratorFactory.annotationCls = DecoratorFactory;\n        return DecoratorFactory;\n    });\n}\nfunction makeMetadataCtor(props) {\n    return function ctor(...args) {\n        if (props) {\n            const values = props(...args);\n            for (const propName in values) {\n                this[propName] = values[propName];\n            }\n        }\n    };\n}\nfunction makeParamDecorator(name, props, parentClass) {\n    return noSideEffects(() => {\n        const metaCtor = makeMetadataCtor(props);\n        function ParamDecoratorFactory(...args) {\n            if (this instanceof ParamDecoratorFactory) {\n                metaCtor.apply(this, args);\n                return this;\n            }\n            const annotationInstance = new ParamDecoratorFactory(...args);\n            ParamDecorator.annotation = annotationInstance;\n            return ParamDecorator;\n            function ParamDecorator(cls, unusedKey, index) {\n                // Use of Object.defineProperty is important since it creates non-enumerable property which\n                // prevents the property is copied during subclassing.\n                const parameters = cls.hasOwnProperty(PARAMETERS) ?\n                    cls[PARAMETERS] :\n                    Object.defineProperty(cls, PARAMETERS, { value: [] })[PARAMETERS];\n                // there might be gaps if some in between parameters do not have annotations.\n                // we pad with nulls.\n                while (parameters.length <= index) {\n                    parameters.push(null);\n                }\n                (parameters[index] = parameters[index] || []).push(annotationInstance);\n                return cls;\n            }\n        }\n        if (parentClass) {\n            ParamDecoratorFactory.prototype = Object.create(parentClass.prototype);\n        }\n        ParamDecoratorFactory.prototype.ngMetadataName = name;\n        ParamDecoratorFactory.annotationCls = ParamDecoratorFactory;\n        return ParamDecoratorFactory;\n    });\n}\nfunction makePropDecorator(name, props, parentClass, additionalProcessing) {\n    return noSideEffects(() => {\n        const metaCtor = makeMetadataCtor(props);\n        function PropDecoratorFactory(...args) {\n            if (this instanceof PropDecoratorFactory) {\n                metaCtor.apply(this, args);\n                return this;\n            }\n            const decoratorInstance = new PropDecoratorFactory(...args);\n            function PropDecorator(target, name) {\n                const constructor = target.constructor;\n                // Use of Object.defineProperty is important because it creates a non-enumerable property\n                // which prevents the property from being copied during subclassing.\n                const meta = constructor.hasOwnProperty(PROP_METADATA) ?\n                    constructor[PROP_METADATA] :\n                    Object.defineProperty(constructor, PROP_METADATA, { value: {} })[PROP_METADATA];\n                meta[name] = meta.hasOwnProperty(name) && meta[name] || [];\n                meta[name].unshift(decoratorInstance);\n                if (additionalProcessing)\n                    additionalProcessing(target, name, ...args);\n            }\n            return PropDecorator;\n        }\n        if (parentClass) {\n            PropDecoratorFactory.prototype = Object.create(parentClass.prototype);\n        }\n        PropDecoratorFactory.prototype.ngMetadataName = name;\n        PropDecoratorFactory.annotationCls = PropDecoratorFactory;\n        return PropDecoratorFactory;\n    });\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst ɵ0 = (token) => ({ token });\n/**\n * Inject decorator and metadata.\n *\n * @Annotation\n * @publicApi\n */\nconst Inject = makeParamDecorator('Inject', ɵ0);\n/**\n * Optional decorator and metadata.\n *\n * @Annotation\n * @publicApi\n */\nconst Optional = makeParamDecorator('Optional');\n/**\n * Self decorator and metadata.\n *\n * @Annotation\n * @publicApi\n */\nconst Self = makeParamDecorator('Self');\n/**\n * `SkipSelf` decorator and metadata.\n *\n * @Annotation\n * @publicApi\n */\nconst SkipSelf = makeParamDecorator('SkipSelf');\n/**\n * Host decorator and metadata.\n *\n * @Annotation\n * @publicApi\n */\nconst Host = makeParamDecorator('Host');\nconst ɵ1 = (attributeName) => ({ attributeName });\n/**\n * Attribute decorator and metadata.\n *\n * @Annotation\n * @publicApi\n */\nconst Attribute = makeParamDecorator('Attribute', ɵ1);\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Injection flags for DI.\n *\n * @publicApi\n */\nvar InjectFlags;\n(function (InjectFlags) {\n    // TODO(alxhub): make this 'const' when ngc no longer writes exports of it into ngfactory files.\n    /** Check self and check parent injector if needed */\n    InjectFlags[InjectFlags[\"Default\"] = 0] = \"Default\";\n    /**\n     * Specifies that an injector should retrieve a dependency from any injector until reaching the\n     * host element of the current component. (Only used with Element Injector)\n     */\n    InjectFlags[InjectFlags[\"Host\"] = 1] = \"Host\";\n    /** Don't ascend to ancestors of the node requesting injection. */\n    InjectFlags[InjectFlags[\"Self\"] = 2] = \"Self\";\n    /** Skip the node that is requesting injection. */\n    InjectFlags[InjectFlags[\"SkipSelf\"] = 4] = \"SkipSelf\";\n    /** Inject `defaultValue` instead if token not found. */\n    InjectFlags[InjectFlags[\"Optional\"] = 8] = \"Optional\";\n})(InjectFlags || (InjectFlags = {}));\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction getClosureSafeProperty(objWithPropertyToExtract) {\n    for (let key in objWithPropertyToExtract) {\n        if (objWithPropertyToExtract[key] === getClosureSafeProperty) {\n            return key;\n        }\n    }\n    throw Error('Could not find renamed property on target object.');\n}\n/**\n * Sets properties on a target object from a source object, but only if\n * the property doesn't already exist on the target object.\n * @param target The target to set properties on\n * @param source The source of the property keys and values to set\n */\nfunction fillProperties(target, source) {\n    for (const key in source) {\n        if (source.hasOwnProperty(key) && !target.hasOwnProperty(key)) {\n            target[key] = source[key];\n        }\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Construct an `InjectableDef` which defines how a token will be constructed by the DI system, and\n * in which injectors (if any) it will be available.\n *\n * This should be assigned to a static `ɵprov` field on a type, which will then be an\n * `InjectableType`.\n *\n * Options:\n * * `providedIn` determines which injectors will include the injectable, by either associating it\n *   with an `@NgModule` or other `InjectorType`, or by specifying that this injectable should be\n *   provided in the `'root'` injector, which will be the application-level injector in most apps.\n * * `factory` gives the zero argument function which will create an instance of the injectable.\n *   The factory can call `inject` to access the `Injector` and request injection of dependencies.\n *\n * @codeGenApi\n * @publicApi This instruction has been emitted by ViewEngine for some time and is deployed to npm.\n */\nfunction ɵɵdefineInjectable(opts) {\n    return {\n        token: opts.token,\n        providedIn: opts.providedIn || null,\n        factory: opts.factory,\n        value: undefined,\n    };\n}\n/**\n * @deprecated in v8, delete after v10. This API should be used only be generated code, and that\n * code should now use ɵɵdefineInjectable instead.\n * @publicApi\n */\nconst defineInjectable = ɵɵdefineInjectable;\n/**\n * Construct an `InjectorDef` which configures an injector.\n *\n * This should be assigned to a static injector def (`ɵinj`) field on a type, which will then be an\n * `InjectorType`.\n *\n * Options:\n *\n * * `factory`: an `InjectorType` is an instantiable type, so a zero argument `factory` function to\n *   create the type must be provided. If that factory function needs to inject arguments, it can\n *   use the `inject` function.\n * * `providers`: an optional array of providers to add to the injector. Each provider must\n *   either have a factory or point to a type which has a `ɵprov` static property (the\n *   type must be an `InjectableType`).\n * * `imports`: an optional array of imports of other `InjectorType`s or `InjectorTypeWithModule`s\n *   whose providers will also be added to the injector. Locally provided types will override\n *   providers from imports.\n *\n * @codeGenApi\n */\nfunction ɵɵdefineInjector(options) {\n    return {\n        factory: options.factory,\n        providers: options.providers || [],\n        imports: options.imports || [],\n    };\n}\n/**\n * Read the injectable def (`ɵprov`) for `type` in a way which is immune to accidentally reading\n * inherited value.\n *\n * @param type A type which may have its own (non-inherited) `ɵprov`.\n */\nfunction getInjectableDef(type) {\n    return getOwnDefinition(type, type[NG_PROV_DEF]) ||\n        getOwnDefinition(type, type[NG_INJECTABLE_DEF]);\n}\n/**\n * Return `def` only if it is defined directly on `type` and is not inherited from a base\n * class of `type`.\n *\n * The function `Object.hasOwnProperty` is not sufficient to distinguish this case because in older\n * browsers (e.g. IE10) static property inheritance is implemented by copying the properties.\n *\n * Instead, the definition's `token` is compared to the `type`, and if they don't match then the\n * property was not defined directly on the type itself, and was likely inherited. The definition\n * is only returned if the `type` matches the `def.token`.\n */\nfunction getOwnDefinition(type, def) {\n    return def && def.token === type ? def : null;\n}\n/**\n * Read the injectable def (`ɵprov`) for `type` or read the `ɵprov` from one of its ancestors.\n *\n * @param type A type which may have `ɵprov`, via inheritance.\n *\n * @deprecated Will be removed in a future version of Angular, where an error will occur in the\n *     scenario if we find the `ɵprov` on an ancestor only.\n */\nfunction getInheritedInjectableDef(type) {\n    // See `jit/injectable.ts#compileInjectable` for context on NG_PROV_DEF_FALLBACK.\n    const def = type &&\n        (type[NG_PROV_DEF] || type[NG_INJECTABLE_DEF] ||\n            (type[NG_PROV_DEF_FALLBACK] && type[NG_PROV_DEF_FALLBACK]()));\n    if (def) {\n        const typeName = getTypeName(type);\n        // TODO(FW-1307): Re-add ngDevMode when closure can handle it\n        // ngDevMode &&\n        console.warn(`DEPRECATED: DI is instantiating a token \"${typeName}\" that inherits its @Injectable decorator but does not provide one itself.\\n` +\n            `This will become an error in a future version of Angular. Please add @Injectable() to the \"${typeName}\" class.`);\n        return def;\n    }\n    else {\n        return null;\n    }\n}\n/** Gets the name of a type, accounting for some cross-browser differences. */\nfunction getTypeName(type) {\n    // `Function.prototype.name` behaves differently between IE and other browsers. In most browsers\n    // it'll always return the name of the function itself, no matter how many other functions it\n    // inherits from. On IE the function doesn't have its own `name` property, but it takes it from\n    // the lowest level in the prototype chain. E.g. if we have `class Foo extends Parent` most\n    // browsers will evaluate `Foo.name` to `Foo` while IE will return `Parent`. We work around\n    // the issue by converting the function to a string and parsing its name out that way via a regex.\n    if (type.hasOwnProperty('name')) {\n        return type.name;\n    }\n    const match = ('' + type).match(/^function\\s*([^\\s(]+)/);\n    return match === null ? '' : match[1];\n}\n/**\n * Read the injector def type in a way which is immune to accidentally reading inherited value.\n *\n * @param type type which may have an injector def (`ɵinj`)\n */\nfunction getInjectorDef(type) {\n    return type && (type.hasOwnProperty(NG_INJ_DEF) || type.hasOwnProperty(NG_INJECTOR_DEF)) ?\n        type[NG_INJ_DEF] :\n        null;\n}\nconst NG_PROV_DEF = getClosureSafeProperty({ ɵprov: getClosureSafeProperty });\nconst NG_INJ_DEF = getClosureSafeProperty({ ɵinj: getClosureSafeProperty });\n// On IE10 properties defined via `defineProperty` won't be inherited by child classes,\n// which will break inheriting the injectable definition from a grandparent through an\n// undecorated parent class. We work around it by defining a fallback method which will be\n// used to retrieve the definition. This should only be a problem in JIT mode, because in\n// AOT TypeScript seems to have a workaround for static properties. When inheriting from an\n// undecorated parent is no longer supported in v10, this can safely be removed.\nconst NG_PROV_DEF_FALLBACK = getClosureSafeProperty({ ɵprovFallback: getClosureSafeProperty });\n// We need to keep these around so we can read off old defs if new defs are unavailable\nconst NG_INJECTABLE_DEF = getClosureSafeProperty({ ngInjectableDef: getClosureSafeProperty });\nconst NG_INJECTOR_DEF = getClosureSafeProperty({ ngInjectorDef: getClosureSafeProperty });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction stringify(token) {\n    if (typeof token === 'string') {\n        return token;\n    }\n    if (Array.isArray(token)) {\n        return '[' + token.map(stringify).join(', ') + ']';\n    }\n    if (token == null) {\n        return '' + token;\n    }\n    if (token.overriddenName) {\n        return `${token.overriddenName}`;\n    }\n    if (token.name) {\n        return `${token.name}`;\n    }\n    const res = token.toString();\n    if (res == null) {\n        return '' + res;\n    }\n    const newLineIndex = res.indexOf('\\n');\n    return newLineIndex === -1 ? res : res.substring(0, newLineIndex);\n}\n/**\n * Concatenates two strings with separator, allocating new strings only when necessary.\n *\n * @param before before string.\n * @param separator separator string.\n * @param after after string.\n * @returns concatenated string.\n */\nfunction concatStringsWithSpace(before, after) {\n    return (before == null || before === '') ?\n        (after === null ? '' : after) :\n        ((after == null || after === '') ? before : before + ' ' + after);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst __forward_ref__ = getClosureSafeProperty({ __forward_ref__: getClosureSafeProperty });\n/**\n * Allows to refer to references which are not yet defined.\n *\n * For instance, `forwardRef` is used when the `token` which we need to refer to for the purposes of\n * DI is declared, but not yet defined. It is also used when the `token` which we use when creating\n * a query is not yet defined.\n *\n * @usageNotes\n * ### Example\n * {@example core/di/ts/forward_ref/forward_ref_spec.ts region='forward_ref'}\n * @publicApi\n */\nfunction forwardRef(forwardRefFn) {\n    forwardRefFn.__forward_ref__ = forwardRef;\n    forwardRefFn.toString = function () {\n        return stringify(this());\n    };\n    return forwardRefFn;\n}\n/**\n * Lazily retrieves the reference value from a forwardRef.\n *\n * Acts as the identity function when given a non-forward-ref value.\n *\n * @usageNotes\n * ### Example\n *\n * {@example core/di/ts/forward_ref/forward_ref_spec.ts region='resolve_forward_ref'}\n *\n * @see `forwardRef`\n * @publicApi\n */\nfunction resolveForwardRef(type) {\n    return isForwardRef(type) ? type() : type;\n}\n/** Checks whether a function is wrapped by a `forwardRef`. */\nfunction isForwardRef(fn) {\n    return typeof fn === 'function' && fn.hasOwnProperty(__forward_ref__) &&\n        fn.__forward_ref__ === forwardRef;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst __globalThis = typeof globalThis !== 'undefined' && globalThis;\nconst __window = typeof window !== 'undefined' && window;\nconst __self = typeof self !== 'undefined' && typeof WorkerGlobalScope !== 'undefined' &&\n    self instanceof WorkerGlobalScope && self;\nconst __global = typeof global !== 'undefined' && global;\n// Always use __globalThis if available, which is the spec-defined global variable across all\n// environments, then fallback to __global first, because in Node tests both __global and\n// __window may be defined and _global should be __global in that case.\nconst _global = __globalThis || __global || __window || __self;\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nvar R3ResolvedDependencyType;\n(function (R3ResolvedDependencyType) {\n    R3ResolvedDependencyType[R3ResolvedDependencyType[\"Token\"] = 0] = \"Token\";\n    R3ResolvedDependencyType[R3ResolvedDependencyType[\"Attribute\"] = 1] = \"Attribute\";\n    R3ResolvedDependencyType[R3ResolvedDependencyType[\"ChangeDetectorRef\"] = 2] = \"ChangeDetectorRef\";\n    R3ResolvedDependencyType[R3ResolvedDependencyType[\"Invalid\"] = 3] = \"Invalid\";\n})(R3ResolvedDependencyType || (R3ResolvedDependencyType = {}));\nvar R3FactoryTarget;\n(function (R3FactoryTarget) {\n    R3FactoryTarget[R3FactoryTarget[\"Directive\"] = 0] = \"Directive\";\n    R3FactoryTarget[R3FactoryTarget[\"Component\"] = 1] = \"Component\";\n    R3FactoryTarget[R3FactoryTarget[\"Injectable\"] = 2] = \"Injectable\";\n    R3FactoryTarget[R3FactoryTarget[\"Pipe\"] = 3] = \"Pipe\";\n    R3FactoryTarget[R3FactoryTarget[\"NgModule\"] = 4] = \"NgModule\";\n})(R3FactoryTarget || (R3FactoryTarget = {}));\nvar ViewEncapsulation;\n(function (ViewEncapsulation) {\n    ViewEncapsulation[ViewEncapsulation[\"Emulated\"] = 0] = \"Emulated\";\n    ViewEncapsulation[ViewEncapsulation[\"Native\"] = 1] = \"Native\";\n    ViewEncapsulation[ViewEncapsulation[\"None\"] = 2] = \"None\";\n    ViewEncapsulation[ViewEncapsulation[\"ShadowDom\"] = 3] = \"ShadowDom\";\n})(ViewEncapsulation || (ViewEncapsulation = {}));\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction getCompilerFacade() {\n    const globalNg = _global['ng'];\n    if (!globalNg || !globalNg.ɵcompilerFacade) {\n        throw new Error(`Angular JIT compilation failed: '@angular/compiler' not loaded!\\n` +\n            `  - JIT compilation is discouraged for production use-cases! Consider AOT mode instead.\\n` +\n            `  - Did you bootstrap using '@angular/platform-browser-dynamic' or '@angular/platform-server'?\\n` +\n            `  - Alternatively provide the compiler with 'import \"@angular/compiler\";' before bootstrapping.`);\n    }\n    return globalNg.ɵcompilerFacade;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst NG_COMP_DEF = getClosureSafeProperty({ ɵcmp: getClosureSafeProperty });\nconst NG_DIR_DEF = getClosureSafeProperty({ ɵdir: getClosureSafeProperty });\nconst NG_PIPE_DEF = getClosureSafeProperty({ ɵpipe: getClosureSafeProperty });\nconst NG_MOD_DEF = getClosureSafeProperty({ ɵmod: getClosureSafeProperty });\nconst NG_LOC_ID_DEF = getClosureSafeProperty({ ɵloc: getClosureSafeProperty });\nconst NG_FACTORY_DEF = getClosureSafeProperty({ ɵfac: getClosureSafeProperty });\n/**\n * If a directive is diPublic, bloomAdd sets a property on the type with this constant as\n * the key and the directive's unique ID as the value. This allows us to map directives to their\n * bloom filter bit for DI.\n */\n// TODO(misko): This is wrong. The NG_ELEMENT_ID should never be minified.\nconst NG_ELEMENT_ID = getClosureSafeProperty({ __NG_ELEMENT_ID__: getClosureSafeProperty });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction ngDevModeResetPerfCounters() {\n    const locationString = typeof location !== 'undefined' ? location.toString() : '';\n    const newCounters = {\n        namedConstructors: locationString.indexOf('ngDevMode=namedConstructors') != -1,\n        firstCreatePass: 0,\n        tNode: 0,\n        tView: 0,\n        rendererCreateTextNode: 0,\n        rendererSetText: 0,\n        rendererCreateElement: 0,\n        rendererAddEventListener: 0,\n        rendererSetAttribute: 0,\n        rendererRemoveAttribute: 0,\n        rendererSetProperty: 0,\n        rendererSetClassName: 0,\n        rendererAddClass: 0,\n        rendererRemoveClass: 0,\n        rendererSetStyle: 0,\n        rendererRemoveStyle: 0,\n        rendererDestroy: 0,\n        rendererDestroyNode: 0,\n        rendererMoveNode: 0,\n        rendererRemoveNode: 0,\n        rendererAppendChild: 0,\n        rendererInsertBefore: 0,\n        rendererCreateComment: 0,\n    };\n    // Make sure to refer to ngDevMode as ['ngDevMode'] for closure.\n    const allowNgDevModeTrue = locationString.indexOf('ngDevMode=false') === -1;\n    _global['ngDevMode'] = allowNgDevModeTrue && newCounters;\n    return newCounters;\n}\n/**\n * This function checks to see if the `ngDevMode` has been set. If yes,\n * then we honor it, otherwise we default to dev mode with additional checks.\n *\n * The idea is that unless we are doing production build where we explicitly\n * set `ngDevMode == false` we should be helping the developer by providing\n * as much early warning and errors as possible.\n *\n * `ɵɵdefineComponent` is guaranteed to have been called before any component template functions\n * (and thus Ivy instructions), so a single initialization there is sufficient to ensure ngDevMode\n * is defined for the entire instruction set.\n *\n * When checking `ngDevMode` on toplevel, always init it before referencing it\n * (e.g. `((typeof ngDevMode === 'undefined' || ngDevMode) && initNgDevMode())`), otherwise you can\n *  get a `ReferenceError` like in https://github.com/angular/angular/issues/31595.\n *\n * Details on possible values for `ngDevMode` can be found on its docstring.\n *\n * NOTE:\n * - changes to the `ngDevMode` name must be synced with `compiler-cli/src/tooling.ts`.\n */\nfunction initNgDevMode() {\n    // The below checks are to ensure that calling `initNgDevMode` multiple times does not\n    // reset the counters.\n    // If the `ngDevMode` is not an object, then it means we have not created the perf counters\n    // yet.\n    if (typeof ngDevMode === 'undefined' || ngDevMode) {\n        if (typeof ngDevMode !== 'object') {\n            ngDevModeResetPerfCounters();\n        }\n        return !!ngDevMode;\n    }\n    return false;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Creates a token that can be used in a DI Provider.\n *\n * Use an `InjectionToken` whenever the type you are injecting is not reified (does not have a\n * runtime representation) such as when injecting an interface, callable type, array or\n * parameterized type.\n *\n * `InjectionToken` is parameterized on `T` which is the type of object which will be returned by\n * the `Injector`. This provides additional level of type safety.\n *\n * ```\n * interface MyInterface {...}\n * var myInterface = injector.get(new InjectionToken<MyInterface>('SomeToken'));\n * // myInterface is inferred to be MyInterface.\n * ```\n *\n * When creating an `InjectionToken`, you can optionally specify a factory function which returns\n * (possibly by creating) a default value of the parameterized type `T`. This sets up the\n * `InjectionToken` using this factory as a provider as if it was defined explicitly in the\n * application's root injector. If the factory function, which takes zero arguments, needs to inject\n * dependencies, it can do so using the `inject` function. See below for an example.\n *\n * Additionally, if a `factory` is specified you can also specify the `providedIn` option, which\n * overrides the above behavior and marks the token as belonging to a particular `@NgModule`. As\n * mentioned above, `'root'` is the default value for `providedIn`.\n *\n * @usageNotes\n * ### Basic Example\n *\n * ### Plain InjectionToken\n *\n * {@example core/di/ts/injector_spec.ts region='InjectionToken'}\n *\n * ### Tree-shakable InjectionToken\n *\n * {@example core/di/ts/injector_spec.ts region='ShakableInjectionToken'}\n *\n *\n * @publicApi\n */\nclass InjectionToken {\n    constructor(_desc, options) {\n        this._desc = _desc;\n        /** @internal */\n        this.ngMetadataName = 'InjectionToken';\n        this.ɵprov = undefined;\n        if (typeof options == 'number') {\n            // This is a special hack to assign __NG_ELEMENT_ID__ to this instance.\n            // __NG_ELEMENT_ID__ is Used by Ivy to determine bloom filter id.\n            // We are using it to assign `-1` which is used to identify `Injector`.\n            this.__NG_ELEMENT_ID__ = options;\n        }\n        else if (options !== undefined) {\n            this.ɵprov = ɵɵdefineInjectable({\n                token: this,\n                providedIn: options.providedIn || 'root',\n                factory: options.factory,\n            });\n        }\n    }\n    toString() {\n        return `InjectionToken ${this._desc}`;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * An InjectionToken that gets the current `Injector` for `createInjector()`-style injectors.\n *\n * Requesting this token instead of `Injector` allows `StaticInjector` to be tree-shaken from a\n * project.\n *\n * @publicApi\n */\nconst INJECTOR = new InjectionToken('INJECTOR', -1 // `-1` is used by Ivy DI system as special value to recognize it as `Injector`.\n);\nconst _THROW_IF_NOT_FOUND = {};\nconst THROW_IF_NOT_FOUND = _THROW_IF_NOT_FOUND;\nconst NG_TEMP_TOKEN_PATH = 'ngTempTokenPath';\nconst NG_TOKEN_PATH = 'ngTokenPath';\nconst NEW_LINE = /\\n/gm;\nconst NO_NEW_LINE = 'ɵ';\nconst SOURCE = '__source';\nconst ɵ0$1 = getClosureSafeProperty;\nconst USE_VALUE = getClosureSafeProperty({ provide: String, useValue: ɵ0$1 });\n/**\n * Current injector value used by `inject`.\n * - `undefined`: it is an error to call `inject`\n * - `null`: `inject` can be called but there is no injector (limp-mode).\n * - Injector instance: Use the injector for resolution.\n */\nlet _currentInjector = undefined;\nfunction setCurrentInjector(injector) {\n    const former = _currentInjector;\n    _currentInjector = injector;\n    return former;\n}\n/**\n * Current implementation of inject.\n *\n * By default, it is `injectInjectorOnly`, which makes it `Injector`-only aware. It can be changed\n * to `directiveInject`, which brings in the `NodeInjector` system of ivy. It is designed this\n * way for two reasons:\n *  1. `Injector` should not depend on ivy logic.\n *  2. To maintain tree shake-ability we don't want to bring in unnecessary code.\n */\nlet _injectImplementation;\n/**\n * Sets the current inject implementation.\n */\nfunction setInjectImplementation(impl) {\n    const previous = _injectImplementation;\n    _injectImplementation = impl;\n    return previous;\n}\nfunction injectInjectorOnly(token, flags = InjectFlags.Default) {\n    if (_currentInjector === undefined) {\n        throw new Error(`inject() must be called from an injection context`);\n    }\n    else if (_currentInjector === null) {\n        return injectRootLimpMode(token, undefined, flags);\n    }\n    else {\n        return _currentInjector.get(token, flags & InjectFlags.Optional ? null : undefined, flags);\n    }\n}\nfunction ɵɵinject(token, flags = InjectFlags.Default) {\n    return (_injectImplementation || injectInjectorOnly)(resolveForwardRef(token), flags);\n}\n/**\n * Throws an error indicating that a factory function could not be generated by the compiler for a\n * particular class.\n *\n * This instruction allows the actual error message to be optimized away when ngDevMode is turned\n * off, saving bytes of generated code while still providing a good experience in dev mode.\n *\n * The name of the class is not mentioned here, but will be in the generated factory function name\n * and thus in the stack trace.\n *\n * @codeGenApi\n */\nfunction ɵɵinvalidFactoryDep(index) {\n    const msg = ngDevMode ?\n        `This constructor is not compatible with Angular Dependency Injection because its dependency at index ${index} of the parameter list is invalid.\nThis can happen if the dependency type is a primitive like a string or if an ancestor of this class is missing an Angular decorator.\n\nPlease check that 1) the type for the parameter at index ${index} is correct and 2) the correct Angular decorators are defined for this class and its ancestors.` :\n        'invalid';\n    throw new Error(msg);\n}\n/**\n * Injects a token from the currently active injector.\n *\n * Must be used in the context of a factory function such as one defined for an\n * `InjectionToken`. Throws an error if not called from such a context.\n *\n * Within such a factory function, using this function to request injection of a dependency\n * is faster and more type-safe than providing an additional array of dependencies\n * (as has been common with `useFactory` providers).\n *\n * @param token The injection token for the dependency to be injected.\n * @param flags Optional flags that control how injection is executed.\n * The flags correspond to injection strategies that can be specified with\n * parameter decorators `@Host`, `@Self`, `@SkipSef`, and `@Optional`.\n * @returns True if injection is successful, null otherwise.\n *\n * @usageNotes\n *\n * ### Example\n *\n * {@example core/di/ts/injector_spec.ts region='ShakableInjectionToken'}\n *\n * @publicApi\n */\nconst inject = ɵɵinject;\n/**\n * Injects `root` tokens in limp mode.\n *\n * If no injector exists, we can still inject tree-shakable providers which have `providedIn` set to\n * `\"root\"`. This is known as the limp mode injection. In such case the value is stored in the\n * `InjectableDef`.\n */\nfunction injectRootLimpMode(token, notFoundValue, flags) {\n    const injectableDef = getInjectableDef(token);\n    if (injectableDef && injectableDef.providedIn == 'root') {\n        return injectableDef.value === undefined ? injectableDef.value = injectableDef.factory() :\n            injectableDef.value;\n    }\n    if (flags & InjectFlags.Optional)\n        return null;\n    if (notFoundValue !== undefined)\n        return notFoundValue;\n    throw new Error(`Injector: NOT_FOUND [${stringify(token)}]`);\n}\nfunction injectArgs(types) {\n    const args = [];\n    for (let i = 0; i < types.length; i++) {\n        const arg = resolveForwardRef(types[i]);\n        if (Array.isArray(arg)) {\n            if (arg.length === 0) {\n                throw new Error('Arguments array must have arguments.');\n            }\n            let type = undefined;\n            let flags = InjectFlags.Default;\n            for (let j = 0; j < arg.length; j++) {\n                const meta = arg[j];\n                if (meta instanceof Optional || meta.ngMetadataName === 'Optional' || meta === Optional) {\n                    flags |= InjectFlags.Optional;\n                }\n                else if (meta instanceof SkipSelf || meta.ngMetadataName === 'SkipSelf' || meta === SkipSelf) {\n                    flags |= InjectFlags.SkipSelf;\n                }\n                else if (meta instanceof Self || meta.ngMetadataName === 'Self' || meta === Self) {\n                    flags |= InjectFlags.Self;\n                }\n                else if (meta instanceof Inject || meta === Inject) {\n                    type = meta.token;\n                }\n                else {\n                    type = meta;\n                }\n            }\n            args.push(ɵɵinject(type, flags));\n        }\n        else {\n            args.push(ɵɵinject(arg));\n        }\n    }\n    return args;\n}\nclass NullInjector {\n    get(token, notFoundValue = THROW_IF_NOT_FOUND) {\n        if (notFoundValue === THROW_IF_NOT_FOUND) {\n            // Intentionally left behind: With dev tools open the debugger will stop here. There is no\n            // reason why correctly written application should cause this exception.\n            // TODO(misko): uncomment the next line once `ngDevMode` works with closure.\n            // if (ngDevMode) debugger;\n            const error = new Error(`NullInjectorError: No provider for ${stringify(token)}!`);\n            error.name = 'NullInjectorError';\n            throw error;\n        }\n        return notFoundValue;\n    }\n}\nfunction catchInjectorError(e, token, injectorErrorName, source) {\n    const tokenPath = e[NG_TEMP_TOKEN_PATH];\n    if (token[SOURCE]) {\n        tokenPath.unshift(token[SOURCE]);\n    }\n    e.message = formatError('\\n' + e.message, tokenPath, injectorErrorName, source);\n    e[NG_TOKEN_PATH] = tokenPath;\n    e[NG_TEMP_TOKEN_PATH] = null;\n    throw e;\n}\nfunction formatError(text, obj, injectorErrorName, source = null) {\n    text = text && text.charAt(0) === '\\n' && text.charAt(1) == NO_NEW_LINE ? text.substr(2) : text;\n    let context = stringify(obj);\n    if (Array.isArray(obj)) {\n        context = obj.map(stringify).join(' -> ');\n    }\n    else if (typeof obj === 'object') {\n        let parts = [];\n        for (let key in obj) {\n            if (obj.hasOwnProperty(key)) {\n                let value = obj[key];\n                parts.push(key + ':' + (typeof value === 'string' ? JSON.stringify(value) : stringify(value)));\n            }\n        }\n        context = `{${parts.join(', ')}}`;\n    }\n    return `${injectorErrorName}${source ? '(' + source + ')' : ''}[${context}]: ${text.replace(NEW_LINE, '\\n  ')}`;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * A mapping of the @angular/core API surface used in generated expressions to the actual symbols.\n *\n * This should be kept up to date with the public exports of @angular/core.\n */\nconst angularCoreDiEnv = {\n    'ɵɵdefineInjectable': ɵɵdefineInjectable,\n    'ɵɵdefineInjector': ɵɵdefineInjector,\n    'ɵɵinject': ɵɵinject,\n    'ɵɵgetFactoryOf': getFactoryOf,\n    'ɵɵinvalidFactoryDep': ɵɵinvalidFactoryDep,\n};\nfunction getFactoryOf(type) {\n    const typeAny = type;\n    if (isForwardRef(type)) {\n        return (() => {\n            const factory = getFactoryOf(resolveForwardRef(typeAny));\n            return factory ? factory() : null;\n        });\n    }\n    const def = getInjectableDef(typeAny) || getInjectorDef(typeAny);\n    if (!def || def.factory === undefined) {\n        return null;\n    }\n    return def.factory;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Represents an instance of an `NgModule` created by an `NgModuleFactory`.\n * Provides access to the `NgModule` instance and related objects.\n *\n * @publicApi\n */\nclass NgModuleRef {\n}\n/**\n * @publicApi\n */\nclass NgModuleFactory {\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction assertNumber(actual, msg) {\n    if (!(typeof actual === 'number')) {\n        throwError(msg, typeof actual, 'number', '===');\n    }\n}\nfunction assertNumberInRange(actual, minInclusive, maxInclusive) {\n    assertNumber(actual, 'Expected a number');\n    assertLessThanOrEqual(actual, maxInclusive, 'Expected number to be less than or equal to');\n    assertGreaterThanOrEqual(actual, minInclusive, 'Expected number to be greater than or equal to');\n}\nfunction assertString(actual, msg) {\n    if (!(typeof actual === 'string')) {\n        throwError(msg, actual === null ? 'null' : typeof actual, 'string', '===');\n    }\n}\nfunction assertEqual(actual, expected, msg) {\n    if (!(actual == expected)) {\n        throwError(msg, actual, expected, '==');\n    }\n}\nfunction assertNotEqual(actual, expected, msg) {\n    if (!(actual != expected)) {\n        throwError(msg, actual, expected, '!=');\n    }\n}\nfunction assertSame(actual, expected, msg) {\n    if (!(actual === expected)) {\n        throwError(msg, actual, expected, '===');\n    }\n}\nfunction assertNotSame(actual, expected, msg) {\n    if (!(actual !== expected)) {\n        throwError(msg, actual, expected, '!==');\n    }\n}\nfunction assertLessThan(actual, expected, msg) {\n    if (!(actual < expected)) {\n        throwError(msg, actual, expected, '<');\n    }\n}\nfunction assertLessThanOrEqual(actual, expected, msg) {\n    if (!(actual <= expected)) {\n        throwError(msg, actual, expected, '<=');\n    }\n}\nfunction assertGreaterThan(actual, expected, msg) {\n    if (!(actual > expected)) {\n        throwError(msg, actual, expected, '>');\n    }\n}\nfunction assertGreaterThanOrEqual(actual, expected, msg) {\n    if (!(actual >= expected)) {\n        throwError(msg, actual, expected, '>=');\n    }\n}\nfunction assertNotDefined(actual, msg) {\n    if (actual != null) {\n        throwError(msg, actual, null, '==');\n    }\n}\nfunction assertDefined(actual, msg) {\n    if (actual == null) {\n        throwError(msg, actual, null, '!=');\n    }\n}\nfunction throwError(msg, actual, expected, comparison) {\n    throw new Error(`ASSERTION ERROR: ${msg}` +\n        (comparison == null ? '' : ` [Expected=> ${expected} ${comparison} ${actual} <=Actual]`));\n}\nfunction assertDomNode(node) {\n    // If we're in a worker, `Node` will not be defined.\n    assertEqual((typeof Node !== 'undefined' && node instanceof Node) ||\n        (typeof node === 'object' && node != null &&\n            node.constructor.name === 'WebWorkerRenderNode'), true, `The provided value must be an instance of a DOM Node but got ${stringify(node)}`);\n}\nfunction assertIndexInRange(arr, index) {\n    const maxLen = arr ? arr.length : 0;\n    assertLessThan(index, maxLen, `Index expected to be less than ${maxLen} but got ${index}`);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Equivalent to ES6 spread, add each item to an array.\n *\n * @param items The items to add\n * @param arr The array to which you want to add the items\n */\nfunction addAllToArray(items, arr) {\n    for (let i = 0; i < items.length; i++) {\n        arr.push(items[i]);\n    }\n}\n/**\n * Flattens an array.\n */\nfunction flatten(list, dst) {\n    if (dst === undefined)\n        dst = list;\n    for (let i = 0; i < list.length; i++) {\n        let item = list[i];\n        if (Array.isArray(item)) {\n            // we need to inline it.\n            if (dst === list) {\n                // Our assumption that the list was already flat was wrong and\n                // we need to clone flat since we need to write to it.\n                dst = list.slice(0, i);\n            }\n            flatten(item, dst);\n        }\n        else if (dst !== list) {\n            dst.push(item);\n        }\n    }\n    return dst;\n}\nfunction deepForEach(input, fn) {\n    input.forEach(value => Array.isArray(value) ? deepForEach(value, fn) : fn(value));\n}\nfunction addToArray(arr, index, value) {\n    // perf: array.push is faster than array.splice!\n    if (index >= arr.length) {\n        arr.push(value);\n    }\n    else {\n        arr.splice(index, 0, value);\n    }\n}\nfunction removeFromArray(arr, index) {\n    // perf: array.pop is faster than array.splice!\n    if (index >= arr.length - 1) {\n        return arr.pop();\n    }\n    else {\n        return arr.splice(index, 1)[0];\n    }\n}\nfunction newArray(size, value) {\n    const list = [];\n    for (let i = 0; i < size; i++) {\n        list.push(value);\n    }\n    return list;\n}\n/**\n * Remove item from array (Same as `Array.splice()` but faster.)\n *\n * `Array.splice()` is not as fast because it has to allocate an array for the elements which were\n * removed. This causes memory pressure and slows down code when most of the time we don't\n * care about the deleted items array.\n *\n * https://jsperf.com/fast-array-splice (About 20x faster)\n *\n * @param array Array to splice\n * @param index Index of element in array to remove.\n * @param count Number of items to remove.\n */\nfunction arraySplice(array, index, count) {\n    const length = array.length - count;\n    while (index < length) {\n        array[index] = array[index + count];\n        index++;\n    }\n    while (count--) {\n        array.pop(); // shrink the array\n    }\n}\n/**\n * Same as `Array.splice(index, 0, value)` but faster.\n *\n * `Array.splice()` is not fast because it has to allocate an array for the elements which were\n * removed. This causes memory pressure and slows down code when most of the time we don't\n * care about the deleted items array.\n *\n * @param array Array to splice.\n * @param index Index in array where the `value` should be added.\n * @param value Value to add to array.\n */\nfunction arrayInsert(array, index, value) {\n    ngDevMode && assertLessThanOrEqual(index, array.length, 'Can\\'t insert past array end.');\n    let end = array.length;\n    while (end > index) {\n        const previousEnd = end - 1;\n        array[end] = array[previousEnd];\n        end = previousEnd;\n    }\n    array[index] = value;\n}\n/**\n * Same as `Array.splice2(index, 0, value1, value2)` but faster.\n *\n * `Array.splice()` is not fast because it has to allocate an array for the elements which were\n * removed. This causes memory pressure and slows down code when most of the time we don't\n * care about the deleted items array.\n *\n * @param array Array to splice.\n * @param index Index in array where the `value` should be added.\n * @param value1 Value to add to array.\n * @param value2 Value to add to array.\n */\nfunction arrayInsert2(array, index, value1, value2) {\n    ngDevMode && assertLessThanOrEqual(index, array.length, 'Can\\'t insert past array end.');\n    let end = array.length;\n    if (end == index) {\n        // inserting at the end.\n        array.push(value1, value2);\n    }\n    else if (end === 1) {\n        // corner case when we have less items in array than we have items to insert.\n        array.push(value2, array[0]);\n        array[0] = value1;\n    }\n    else {\n        end--;\n        array.push(array[end - 1], array[end]);\n        while (end > index) {\n            const previousEnd = end - 2;\n            array[end] = array[previousEnd];\n            end--;\n        }\n        array[index] = value1;\n        array[index + 1] = value2;\n    }\n}\n/**\n * Insert a `value` into an `array` so that the array remains sorted.\n *\n * NOTE:\n * - Duplicates are not allowed, and are ignored.\n * - This uses binary search algorithm for fast inserts.\n *\n * @param array A sorted array to insert into.\n * @param value The value to insert.\n * @returns index of the inserted value.\n */\nfunction arrayInsertSorted(array, value) {\n    let index = arrayIndexOfSorted(array, value);\n    if (index < 0) {\n        // if we did not find it insert it.\n        index = ~index;\n        arrayInsert(array, index, value);\n    }\n    return index;\n}\n/**\n * Remove `value` from a sorted `array`.\n *\n * NOTE:\n * - This uses binary search algorithm for fast removals.\n *\n * @param array A sorted array to remove from.\n * @param value The value to remove.\n * @returns index of the removed value.\n *   - positive index if value found and removed.\n *   - negative index if value not found. (`~index` to get the value where it should have been\n *     inserted)\n */\nfunction arrayRemoveSorted(array, value) {\n    const index = arrayIndexOfSorted(array, value);\n    if (index >= 0) {\n        arraySplice(array, index, 1);\n    }\n    return index;\n}\n/**\n * Get an index of an `value` in a sorted `array`.\n *\n * NOTE:\n * - This uses binary search algorithm for fast removals.\n *\n * @param array A sorted array to binary search.\n * @param value The value to look for.\n * @returns index of the value.\n *   - positive index if value found.\n *   - negative index if value not found. (`~index` to get the value where it should have been\n *     located)\n */\nfunction arrayIndexOfSorted(array, value) {\n    return _arrayIndexOfSorted(array, value, 0);\n}\n/**\n * Set a `value` for a `key`.\n *\n * @param keyValueArray to modify.\n * @param key The key to locate or create.\n * @param value The value to set for a `key`.\n * @returns index (always even) of where the value vas set.\n */\nfunction keyValueArraySet(keyValueArray, key, value) {\n    let index = keyValueArrayIndexOf(keyValueArray, key);\n    if (index >= 0) {\n        // if we found it set it.\n        keyValueArray[index | 1] = value;\n    }\n    else {\n        index = ~index;\n        arrayInsert2(keyValueArray, index, key, value);\n    }\n    return index;\n}\n/**\n * Retrieve a `value` for a `key` (on `undefined` if not found.)\n *\n * @param keyValueArray to search.\n * @param key The key to locate.\n * @return The `value` stored at the `key` location or `undefined if not found.\n */\nfunction keyValueArrayGet(keyValueArray, key) {\n    const index = keyValueArrayIndexOf(keyValueArray, key);\n    if (index >= 0) {\n        // if we found it retrieve it.\n        return keyValueArray[index | 1];\n    }\n    return undefined;\n}\n/**\n * Retrieve a `key` index value in the array or `-1` if not found.\n *\n * @param keyValueArray to search.\n * @param key The key to locate.\n * @returns index of where the key is (or should have been.)\n *   - positive (even) index if key found.\n *   - negative index if key not found. (`~index` (even) to get the index where it should have\n *     been inserted.)\n */\nfunction keyValueArrayIndexOf(keyValueArray, key) {\n    return _arrayIndexOfSorted(keyValueArray, key, 1);\n}\n/**\n * Delete a `key` (and `value`) from the `KeyValueArray`.\n *\n * @param keyValueArray to modify.\n * @param key The key to locate or delete (if exist).\n * @returns index of where the key was (or should have been.)\n *   - positive (even) index if key found and deleted.\n *   - negative index if key not found. (`~index` (even) to get the index where it should have\n *     been.)\n */\nfunction keyValueArrayDelete(keyValueArray, key) {\n    const index = keyValueArrayIndexOf(keyValueArray, key);\n    if (index >= 0) {\n        // if we found it remove it.\n        arraySplice(keyValueArray, index, 2);\n    }\n    return index;\n}\n/**\n * INTERNAL: Get an index of an `value` in a sorted `array` by grouping search by `shift`.\n *\n * NOTE:\n * - This uses binary search algorithm for fast removals.\n *\n * @param array A sorted array to binary search.\n * @param value The value to look for.\n * @param shift grouping shift.\n *   - `0` means look at every location\n *   - `1` means only look at every other (even) location (the odd locations are to be ignored as\n *         they are values.)\n * @returns index of the value.\n *   - positive index if value found.\n *   - negative index if value not found. (`~index` to get the value where it should have been\n * inserted)\n */\nfunction _arrayIndexOfSorted(array, value, shift) {\n    ngDevMode && assertEqual(Array.isArray(array), true, 'Expecting an array');\n    let start = 0;\n    let end = array.length >> shift;\n    while (end !== start) {\n        const middle = start + ((end - start) >> 1); // find the middle.\n        const current = array[middle << shift];\n        if (value === current) {\n            return (middle << shift);\n        }\n        else if (current > value) {\n            end = middle;\n        }\n        else {\n            start = middle + 1; // We already searched middle so make it non-inclusive by adding 1\n        }\n    }\n    return ~(end << shift);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * The strategy that the default change detector uses to detect changes.\n * When set, takes effect the next time change detection is triggered.\n *\n * @see {@link ChangeDetectorRef#usage-notes Change detection usage}\n *\n * @publicApi\n */\nvar ChangeDetectionStrategy;\n(function (ChangeDetectionStrategy) {\n    /**\n     * Use the `CheckOnce` strategy, meaning that automatic change detection is deactivated\n     * until reactivated by setting the strategy to `Default` (`CheckAlways`).\n     * Change detection can still be explicitly invoked.\n     * This strategy applies to all child directives and cannot be overridden.\n     */\n    ChangeDetectionStrategy[ChangeDetectionStrategy[\"OnPush\"] = 0] = \"OnPush\";\n    /**\n     * Use the default `CheckAlways` strategy, in which change detection is automatic until\n     * explicitly deactivated.\n     */\n    ChangeDetectionStrategy[ChangeDetectionStrategy[\"Default\"] = 1] = \"Default\";\n})(ChangeDetectionStrategy || (ChangeDetectionStrategy = {}));\n/**\n * Defines the possible states of the default change detector.\n * @see `ChangeDetectorRef`\n */\nvar ChangeDetectorStatus;\n(function (ChangeDetectorStatus) {\n    /**\n     * A state in which, after calling `detectChanges()`, the change detector\n     * state becomes `Checked`, and must be explicitly invoked or reactivated.\n     */\n    ChangeDetectorStatus[ChangeDetectorStatus[\"CheckOnce\"] = 0] = \"CheckOnce\";\n    /**\n     * A state in which change detection is skipped until the change detector mode\n     * becomes `CheckOnce`.\n     */\n    ChangeDetectorStatus[ChangeDetectorStatus[\"Checked\"] = 1] = \"Checked\";\n    /**\n     * A state in which change detection continues automatically until explicitly\n     * deactivated.\n     */\n    ChangeDetectorStatus[ChangeDetectorStatus[\"CheckAlways\"] = 2] = \"CheckAlways\";\n    /**\n     * A state in which a change detector sub tree is not a part of the main tree and\n     * should be skipped.\n     */\n    ChangeDetectorStatus[ChangeDetectorStatus[\"Detached\"] = 3] = \"Detached\";\n    /**\n     * Indicates that the change detector encountered an error checking a binding\n     * or calling a directive lifecycle method and is now in an inconsistent state. Change\n     * detectors in this state do not detect changes.\n     */\n    ChangeDetectorStatus[ChangeDetectorStatus[\"Errored\"] = 4] = \"Errored\";\n    /**\n     * Indicates that the change detector has been destroyed.\n     */\n    ChangeDetectorStatus[ChangeDetectorStatus[\"Destroyed\"] = 5] = \"Destroyed\";\n})(ChangeDetectorStatus || (ChangeDetectorStatus = {}));\n/**\n * Reports whether a given strategy is currently the default for change detection.\n * @param changeDetectionStrategy The strategy to check.\n * @returns True if the given strategy is the current default, false otherwise.\n * @see `ChangeDetectorStatus`\n * @see `ChangeDetectorRef`\n */\nfunction isDefaultChangeDetectionStrategy(changeDetectionStrategy) {\n    return changeDetectionStrategy == null ||\n        changeDetectionStrategy === ChangeDetectionStrategy.Default;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Defines template and style encapsulation options available for Component's {@link Component}.\n *\n * See {@link Component#encapsulation encapsulation}.\n *\n * @usageNotes\n * ### Example\n *\n * {@example core/ts/metadata/encapsulation.ts region='longform'}\n *\n * @publicApi\n */\nvar ViewEncapsulation$1;\n(function (ViewEncapsulation) {\n    /**\n     * Emulate `Native` scoping of styles by adding an attribute containing surrogate id to the Host\n     * Element and pre-processing the style rules provided via {@link Component#styles styles} or\n     * {@link Component#styleUrls styleUrls}, and adding the new Host Element attribute to all\n     * selectors.\n     *\n     * This is the default option.\n     */\n    ViewEncapsulation[ViewEncapsulation[\"Emulated\"] = 0] = \"Emulated\";\n    /**\n     * @deprecated v6.1.0 - use {ViewEncapsulation.ShadowDom} instead.\n     * Use the native encapsulation mechanism of the renderer.\n     *\n     * For the DOM this means using the deprecated [Shadow DOM\n     * v0](https://w3c.github.io/webcomponents/spec/shadow/) and\n     * creating a ShadowRoot for Component's Host Element.\n     */\n    ViewEncapsulation[ViewEncapsulation[\"Native\"] = 1] = \"Native\";\n    /**\n     * Don't provide any template or style encapsulation.\n     */\n    ViewEncapsulation[ViewEncapsulation[\"None\"] = 2] = \"None\";\n    /**\n     * Use Shadow DOM to encapsulate styles.\n     *\n     * For the DOM this means using modern [Shadow\n     * DOM](https://w3c.github.io/webcomponents/spec/shadow/) and\n     * creating a ShadowRoot for Component's Host Element.\n     */\n    ViewEncapsulation[ViewEncapsulation[\"ShadowDom\"] = 3] = \"ShadowDom\";\n})(ViewEncapsulation$1 || (ViewEncapsulation$1 = {}));\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * This file contains reuseable \"empty\" symbols that can be used as default return values\n * in different parts of the rendering code. Because the same symbols are returned, this\n * allows for identity checks against these values to be consistently used by the framework\n * code.\n */\nconst EMPTY_OBJ = {};\nconst EMPTY_ARRAY = [];\n// freezing the values prevents any code from accidentally inserting new values in\nif ((typeof ngDevMode === 'undefined' || ngDevMode) && initNgDevMode()) {\n    // These property accesses can be ignored because ngDevMode will be set to false\n    // when optimizing code and the whole if statement will be dropped.\n    // tslint:disable-next-line:no-toplevel-property-access\n    Object.freeze(EMPTY_OBJ);\n    // tslint:disable-next-line:no-toplevel-property-access\n    Object.freeze(EMPTY_ARRAY);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nlet _renderCompCount = 0;\n/**\n * Create a component definition object.\n *\n *\n * # Example\n * ```\n * class MyDirective {\n *   // Generated by Angular Template Compiler\n *   // [Symbol] syntax will not be supported by TypeScript until v2.7\n *   static ɵcmp = defineComponent({\n *     ...\n *   });\n * }\n * ```\n * @codeGenApi\n */\nfunction ɵɵdefineComponent(componentDefinition) {\n    return noSideEffects(() => {\n        // Initialize ngDevMode. This must be the first statement in ɵɵdefineComponent.\n        // See the `initNgDevMode` docstring for more information.\n        (typeof ngDevMode === 'undefined' || ngDevMode) && initNgDevMode();\n        const type = componentDefinition.type;\n        const typePrototype = type.prototype;\n        const declaredInputs = {};\n        const def = {\n            type: type,\n            providersResolver: null,\n            decls: componentDefinition.decls,\n            vars: componentDefinition.vars,\n            factory: null,\n            template: componentDefinition.template || null,\n            consts: componentDefinition.consts || null,\n            ngContentSelectors: componentDefinition.ngContentSelectors,\n            hostBindings: componentDefinition.hostBindings || null,\n            hostVars: componentDefinition.hostVars || 0,\n            hostAttrs: componentDefinition.hostAttrs || null,\n            contentQueries: componentDefinition.contentQueries || null,\n            declaredInputs: declaredInputs,\n            inputs: null,\n            outputs: null,\n            exportAs: componentDefinition.exportAs || null,\n            onPush: componentDefinition.changeDetection === ChangeDetectionStrategy.OnPush,\n            directiveDefs: null,\n            pipeDefs: null,\n            selectors: componentDefinition.selectors || EMPTY_ARRAY,\n            viewQuery: componentDefinition.viewQuery || null,\n            features: componentDefinition.features || null,\n            data: componentDefinition.data || {},\n            // TODO(misko): convert ViewEncapsulation into const enum so that it can be used\n            // directly in the next line. Also `None` should be 0 not 2.\n            encapsulation: componentDefinition.encapsulation || ViewEncapsulation$1.Emulated,\n            id: 'c',\n            styles: componentDefinition.styles || EMPTY_ARRAY,\n            _: null,\n            setInput: null,\n            schemas: componentDefinition.schemas || null,\n            tView: null,\n        };\n        const directiveTypes = componentDefinition.directives;\n        const feature = componentDefinition.features;\n        const pipeTypes = componentDefinition.pipes;\n        def.id += _renderCompCount++;\n        def.inputs = invertObject(componentDefinition.inputs, declaredInputs),\n            def.outputs = invertObject(componentDefinition.outputs),\n            feature && feature.forEach((fn) => fn(def));\n        def.directiveDefs = directiveTypes ?\n            () => (typeof directiveTypes === 'function' ? directiveTypes() : directiveTypes)\n                .map(extractDirectiveDef) :\n            null;\n        def.pipeDefs = pipeTypes ?\n            () => (typeof pipeTypes === 'function' ? pipeTypes() : pipeTypes).map(extractPipeDef) :\n            null;\n        return def;\n    });\n}\n/**\n * @codeGenApi\n */\nfunction ɵɵsetComponentScope(type, directives, pipes) {\n    const def = type.ɵcmp;\n    def.directiveDefs = () => directives.map(extractDirectiveDef);\n    def.pipeDefs = () => pipes.map(extractPipeDef);\n}\nfunction extractDirectiveDef(type) {\n    const def = getComponentDef(type) || getDirectiveDef(type);\n    if (ngDevMode && !def) {\n        throw new Error(`'${type.name}' is neither 'ComponentType' or 'DirectiveType'.`);\n    }\n    return def;\n}\nfunction extractPipeDef(type) {\n    const def = getPipeDef(type);\n    if (ngDevMode && !def) {\n        throw new Error(`'${type.name}' is not a 'PipeType'.`);\n    }\n    return def;\n}\nconst autoRegisterModuleById = {};\n/**\n * @codeGenApi\n */\nfunction ɵɵdefineNgModule(def) {\n    const res = {\n        type: def.type,\n        bootstrap: def.bootstrap || EMPTY_ARRAY,\n        declarations: def.declarations || EMPTY_ARRAY,\n        imports: def.imports || EMPTY_ARRAY,\n        exports: def.exports || EMPTY_ARRAY,\n        transitiveCompileScopes: null,\n        schemas: def.schemas || null,\n        id: def.id || null,\n    };\n    if (def.id != null) {\n        noSideEffects(() => {\n            autoRegisterModuleById[def.id] = def.type;\n        });\n    }\n    return res;\n}\n/**\n * Adds the module metadata that is necessary to compute the module's transitive scope to an\n * existing module definition.\n *\n * Scope metadata of modules is not used in production builds, so calls to this function can be\n * marked pure to tree-shake it from the bundle, allowing for all referenced declarations\n * to become eligible for tree-shaking as well.\n *\n * @codeGenApi\n */\nfunction ɵɵsetNgModuleScope(type, scope) {\n    return noSideEffects(() => {\n        const ngModuleDef = getNgModuleDef(type, true);\n        ngModuleDef.declarations = scope.declarations || EMPTY_ARRAY;\n        ngModuleDef.imports = scope.imports || EMPTY_ARRAY;\n        ngModuleDef.exports = scope.exports || EMPTY_ARRAY;\n    });\n}\n/**\n * Inverts an inputs or outputs lookup such that the keys, which were the\n * minified keys, are part of the values, and the values are parsed so that\n * the publicName of the property is the new key\n *\n * e.g. for\n *\n * ```\n * class Comp {\n *   @Input()\n *   propName1: string;\n *\n *   @Input('publicName2')\n *   declaredPropName2: number;\n * }\n * ```\n *\n * will be serialized as\n *\n * ```\n * {\n *   propName1: 'propName1',\n *   declaredPropName2: ['publicName2', 'declaredPropName2'],\n * }\n * ```\n *\n * which is than translated by the minifier as:\n *\n * ```\n * {\n *   minifiedPropName1: 'propName1',\n *   minifiedPropName2: ['publicName2', 'declaredPropName2'],\n * }\n * ```\n *\n * becomes: (public name => minifiedName)\n *\n * ```\n * {\n *  'propName1': 'minifiedPropName1',\n *  'publicName2': 'minifiedPropName2',\n * }\n * ```\n *\n * Optionally the function can take `secondary` which will result in: (public name => declared name)\n *\n * ```\n * {\n *  'propName1': 'propName1',\n *  'publicName2': 'declaredPropName2',\n * }\n * ```\n *\n\n */\nfunction invertObject(obj, secondary) {\n    if (obj == null)\n        return EMPTY_OBJ;\n    const newLookup = {};\n    for (const minifiedKey in obj) {\n        if (obj.hasOwnProperty(minifiedKey)) {\n            let publicName = obj[minifiedKey];\n            let declaredName = publicName;\n            if (Array.isArray(publicName)) {\n                declaredName = publicName[1];\n                publicName = publicName[0];\n            }\n            newLookup[publicName] = minifiedKey;\n            if (secondary) {\n                (secondary[publicName] = declaredName);\n            }\n        }\n    }\n    return newLookup;\n}\n/**\n * Create a directive definition object.\n *\n * # Example\n * ```ts\n * class MyDirective {\n *   // Generated by Angular Template Compiler\n *   // [Symbol] syntax will not be supported by TypeScript until v2.7\n *   static ɵdir = ɵɵdefineDirective({\n *     ...\n *   });\n * }\n * ```\n *\n * @codeGenApi\n */\nconst ɵɵdefineDirective = ɵɵdefineComponent;\n/**\n * Create a pipe definition object.\n *\n * # Example\n * ```\n * class MyPipe implements PipeTransform {\n *   // Generated by Angular Template Compiler\n *   static ɵpipe = definePipe({\n *     ...\n *   });\n * }\n * ```\n * @param pipeDef Pipe definition generated by the compiler\n *\n * @codeGenApi\n */\nfunction ɵɵdefinePipe(pipeDef) {\n    return {\n        type: pipeDef.type,\n        name: pipeDef.name,\n        factory: null,\n        pure: pipeDef.pure !== false,\n        onDestroy: pipeDef.type.prototype.ngOnDestroy || null\n    };\n}\n/**\n * The following getter methods retrieve the definition form the type. Currently the retrieval\n * honors inheritance, but in the future we may change the rule to require that definitions are\n * explicit. This would require some sort of migration strategy.\n */\nfunction getComponentDef(type) {\n    return type[NG_COMP_DEF] || null;\n}\nfunction getDirectiveDef(type) {\n    return type[NG_DIR_DEF] || null;\n}\nfunction getPipeDef(type) {\n    return type[NG_PIPE_DEF] || null;\n}\nfunction getFactoryDef(type, throwNotFound) {\n    const hasFactoryDef = type.hasOwnProperty(NG_FACTORY_DEF);\n    if (!hasFactoryDef && throwNotFound === true && ngDevMode) {\n        throw new Error(`Type ${stringify(type)} does not have 'ɵfac' property.`);\n    }\n    return hasFactoryDef ? type[NG_FACTORY_DEF] : null;\n}\nfunction getNgModuleDef(type, throwNotFound) {\n    const ngModuleDef = type[NG_MOD_DEF] || null;\n    if (!ngModuleDef && throwNotFound === true) {\n        throw new Error(`Type ${stringify(type)} does not have 'ɵmod' property.`);\n    }\n    return ngModuleDef;\n}\nfunction getNgLocaleIdDef(type) {\n    return type[NG_LOC_ID_DEF] || null;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// Below are constants for LView indices to help us look up LView members\n// without having to remember the specific indices.\n// Uglify will inline these when minifying so there shouldn't be a cost.\nconst HOST = 0;\nconst TVIEW = 1;\nconst FLAGS = 2;\nconst PARENT = 3;\nconst NEXT = 4;\nconst TRANSPLANTED_VIEWS_TO_REFRESH = 5;\nconst T_HOST = 6;\nconst CLEANUP = 7;\nconst CONTEXT = 8;\nconst INJECTOR$1 = 9;\nconst RENDERER_FACTORY = 10;\nconst RENDERER = 11;\nconst SANITIZER = 12;\nconst CHILD_HEAD = 13;\nconst CHILD_TAIL = 14;\nconst DECLARATION_VIEW = 15;\nconst DECLARATION_COMPONENT_VIEW = 16;\nconst DECLARATION_LCONTAINER = 17;\nconst PREORDER_HOOK_FLAGS = 18;\nconst QUERIES = 19;\n/** Size of LView's header. Necessary to adjust for it when setting slots.  */\nconst HEADER_OFFSET = 20;\n// Note: This hack is necessary so we don't erroneously get a circular dependency\n// failure based on types.\nconst unusedValueExportToPlacateAjd = 1;\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Special location which allows easy identification of type. If we have an array which was\n * retrieved from the `LView` and that array has `true` at `TYPE` location, we know it is\n * `LContainer`.\n */\nconst TYPE = 1;\n/**\n * Below are constants for LContainer indices to help us look up LContainer members\n * without having to remember the specific indices.\n * Uglify will inline these when minifying so there shouldn't be a cost.\n */\n/**\n * Flag to signify that this `LContainer` may have transplanted views which need to be change\n * detected. (see: `LView[DECLARATION_COMPONENT_VIEW])`.\n *\n * This flag, once set, is never unset for the `LContainer`. This means that when unset we can skip\n * a lot of work in `refreshEmbeddedViews`. But when set we still need to verify\n * that the `MOVED_VIEWS` are transplanted and on-push.\n */\nconst HAS_TRANSPLANTED_VIEWS = 2;\n// PARENT, NEXT, TRANSPLANTED_VIEWS_TO_REFRESH are indices 3, 4, and 5\n// As we already have these constants in LView, we don't need to re-create them.\n// T_HOST is index 6\n// We already have this constants in LView, we don't need to re-create it.\nconst NATIVE = 7;\nconst VIEW_REFS = 8;\nconst MOVED_VIEWS = 9;\n/**\n * Size of LContainer's header. Represents the index after which all views in the\n * container will be inserted. We need to keep a record of current views so we know\n * which views are already in the DOM (and don't need to be re-added) and so we can\n * remove views from the DOM when they are no longer required.\n */\nconst CONTAINER_HEADER_OFFSET = 10;\n// Note: This hack is necessary so we don't erroneously get a circular dependency\n// failure based on types.\nconst unusedValueExportToPlacateAjd$1 = 1;\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * True if `value` is `LView`.\n * @param value wrapped value of `RNode`, `LView`, `LContainer`\n */\nfunction isLView(value) {\n    return Array.isArray(value) && typeof value[TYPE] === 'object';\n}\n/**\n * True if `value` is `LContainer`.\n * @param value wrapped value of `RNode`, `LView`, `LContainer`\n */\nfunction isLContainer(value) {\n    return Array.isArray(value) && value[TYPE] === true;\n}\nfunction isContentQueryHost(tNode) {\n    return (tNode.flags & 8 /* hasContentQuery */) !== 0;\n}\nfunction isComponentHost(tNode) {\n    return (tNode.flags & 2 /* isComponentHost */) === 2 /* isComponentHost */;\n}\nfunction isDirectiveHost(tNode) {\n    return (tNode.flags & 1 /* isDirectiveHost */) === 1 /* isDirectiveHost */;\n}\nfunction isComponentDef(def) {\n    return def.template !== null;\n}\nfunction isRootView(target) {\n    return (target[FLAGS] & 512 /* IsRoot */) !== 0;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// [Assert functions do not constraint type when they are guarded by a truthy\n// expression.](https://github.com/microsoft/TypeScript/issues/37295)\nfunction assertTNodeForLView(tNode, lView) {\n    tNode.hasOwnProperty('tView_') &&\n        assertEqual(tNode.tView_, lView[TVIEW], 'This TNode does not belong to this LView.');\n}\nfunction assertComponentType(actual, msg = 'Type passed in is not ComponentType, it does not have \\'ɵcmp\\' property.') {\n    if (!getComponentDef(actual)) {\n        throwError(msg);\n    }\n}\nfunction assertNgModuleType(actual, msg = 'Type passed in is not NgModuleType, it does not have \\'ɵmod\\' property.') {\n    if (!getNgModuleDef(actual)) {\n        throwError(msg);\n    }\n}\nfunction assertPreviousIsParent(isParent) {\n    assertEqual(isParent, true, 'previousOrParentTNode should be a parent');\n}\nfunction assertHasParent(tNode) {\n    assertDefined(tNode, 'previousOrParentTNode should exist!');\n    assertDefined(tNode.parent, 'previousOrParentTNode should have a parent');\n}\nfunction assertDataNext(lView, index, arr) {\n    if (arr == null)\n        arr = lView;\n    assertEqual(arr.length, index, `index ${index} expected to be at the end of arr (length ${arr.length})`);\n}\nfunction assertLContainer(value) {\n    assertDefined(value, 'LContainer must be defined');\n    assertEqual(isLContainer(value), true, 'Expecting LContainer');\n}\nfunction assertLViewOrUndefined(value) {\n    value && assertEqual(isLView(value), true, 'Expecting LView or undefined or null');\n}\nfunction assertLView(value) {\n    assertDefined(value, 'LView must be defined');\n    assertEqual(isLView(value), true, 'Expecting LView');\n}\nfunction assertFirstCreatePass(tView, errMessage) {\n    assertEqual(tView.firstCreatePass, true, errMessage || 'Should only be called in first create pass.');\n}\nfunction assertFirstUpdatePass(tView, errMessage) {\n    assertEqual(tView.firstUpdatePass, true, errMessage || 'Should only be called in first update pass.');\n}\n/**\n * This is a basic sanity check that an object is probably a directive def. DirectiveDef is\n * an interface, so we can't do a direct instanceof check.\n */\nfunction assertDirectiveDef(obj) {\n    if (obj.type === undefined || obj.selectors == undefined || obj.inputs === undefined) {\n        throwError(`Expected a DirectiveDef/ComponentDef and this object does not seem to have the expected shape.`);\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Represents a basic change from a previous to a new value for a single\n * property on a directive instance. Passed as a value in a\n * {@link SimpleChanges} object to the `ngOnChanges` hook.\n *\n * @see `OnChanges`\n *\n * @publicApi\n */\nclass SimpleChange {\n    constructor(previousValue, currentValue, firstChange) {\n        this.previousValue = previousValue;\n        this.currentValue = currentValue;\n        this.firstChange = firstChange;\n    }\n    /**\n     * Check whether the new value is the first value assigned.\n     */\n    isFirstChange() {\n        return this.firstChange;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * The NgOnChangesFeature decorates a component with support for the ngOnChanges\n * lifecycle hook, so it should be included in any component that implements\n * that hook.\n *\n * If the component or directive uses inheritance, the NgOnChangesFeature MUST\n * be included as a feature AFTER {@link InheritDefinitionFeature}, otherwise\n * inherited properties will not be propagated to the ngOnChanges lifecycle\n * hook.\n *\n * Example usage:\n *\n * ```\n * static ɵcmp = defineComponent({\n *   ...\n *   inputs: {name: 'publicName'},\n *   features: [NgOnChangesFeature]\n * });\n * ```\n *\n * @codeGenApi\n */\nfunction ɵɵNgOnChangesFeature() {\n    return NgOnChangesFeatureImpl;\n}\nfunction NgOnChangesFeatureImpl(definition) {\n    if (definition.type.prototype.ngOnChanges) {\n        definition.setInput = ngOnChangesSetInput;\n    }\n    return rememberChangeHistoryAndInvokeOnChangesHook;\n}\n// This option ensures that the ngOnChanges lifecycle hook will be inherited\n// from superclasses (in InheritDefinitionFeature).\n/** @nocollapse */\n// tslint:disable-next-line:no-toplevel-property-access\nɵɵNgOnChangesFeature.ngInherit = true;\n/**\n * This is a synthetic lifecycle hook which gets inserted into `TView.preOrderHooks` to simulate\n * `ngOnChanges`.\n *\n * The hook reads the `NgSimpleChangesStore` data from the component instance and if changes are\n * found it invokes `ngOnChanges` on the component instance.\n *\n * @param this Component instance. Because this function gets inserted into `TView.preOrderHooks`,\n *     it is guaranteed to be called with component instance.\n */\nfunction rememberChangeHistoryAndInvokeOnChangesHook() {\n    const simpleChangesStore = getSimpleChangesStore(this);\n    const current = simpleChangesStore === null || simpleChangesStore === void 0 ? void 0 : simpleChangesStore.current;\n    if (current) {\n        const previous = simpleChangesStore.previous;\n        if (previous === EMPTY_OBJ) {\n            simpleChangesStore.previous = current;\n        }\n        else {\n            // New changes are copied to the previous store, so that we don't lose history for inputs\n            // which were not changed this time\n            for (let key in current) {\n                previous[key] = current[key];\n            }\n        }\n        simpleChangesStore.current = null;\n        this.ngOnChanges(current);\n    }\n}\nfunction ngOnChangesSetInput(instance, value, publicName, privateName) {\n    const simpleChangesStore = getSimpleChangesStore(instance) ||\n        setSimpleChangesStore(instance, { previous: EMPTY_OBJ, current: null });\n    const current = simpleChangesStore.current || (simpleChangesStore.current = {});\n    const previous = simpleChangesStore.previous;\n    const declaredName = this.declaredInputs[publicName];\n    const previousChange = previous[declaredName];\n    current[declaredName] = new SimpleChange(previousChange && previousChange.currentValue, value, previous === EMPTY_OBJ);\n    instance[privateName] = value;\n}\nconst SIMPLE_CHANGES_STORE = '__ngSimpleChanges__';\nfunction getSimpleChangesStore(instance) {\n    return instance[SIMPLE_CHANGES_STORE] || null;\n}\nfunction setSimpleChangesStore(instance, store) {\n    return instance[SIMPLE_CHANGES_STORE] = store;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst SVG_NAMESPACE = 'http://www.w3.org/2000/svg';\nconst MATH_ML_NAMESPACE = 'http://www.w3.org/1998/MathML/';\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * This property will be monkey-patched on elements, components and directives\n */\nconst MONKEY_PATCH_KEY_NAME = '__ngContext__';\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Most of the use of `document` in Angular is from within the DI system so it is possible to simply\n * inject the `DOCUMENT` token and are done.\n *\n * Ivy is special because it does not rely upon the DI and must get hold of the document some other\n * way.\n *\n * The solution is to define `getDocument()` and `setDocument()` top-level functions for ivy.\n * Wherever ivy needs the global document, it calls `getDocument()` instead.\n *\n * When running ivy outside of a browser environment, it is necessary to call `setDocument()` to\n * tell ivy what the global `document` is.\n *\n * Angular does this for us in each of the standard platforms (`Browser`, `Server`, and `WebWorker`)\n * by calling `setDocument()` when providing the `DOCUMENT` token.\n */\nlet DOCUMENT = undefined;\n/**\n * Tell ivy what the `document` is for this platform.\n *\n * It is only necessary to call this if the current platform is not a browser.\n *\n * @param document The object representing the global `document` in this environment.\n */\nfunction setDocument(document) {\n    DOCUMENT = document;\n}\n/**\n * Access the object that represents the `document` for this platform.\n *\n * Ivy calls this whenever it needs to access the `document` object.\n * For example to create the renderer or to do sanitization.\n */\nfunction getDocument() {\n    if (DOCUMENT !== undefined) {\n        return DOCUMENT;\n    }\n    else if (typeof document !== 'undefined') {\n        return document;\n    }\n    // No \"document\" can be found. This should only happen if we are running ivy outside Angular and\n    // the current platform is not a browser. Since this is not a supported scenario at the moment\n    // this should not happen in Angular apps.\n    // Once we support running ivy outside of Angular we will need to publish `setDocument()` as a\n    // public API. Meanwhile we just return `undefined` and let the application fail.\n    return undefined;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// TODO: cleanup once the code is merged in angular/angular\nvar RendererStyleFlags3;\n(function (RendererStyleFlags3) {\n    RendererStyleFlags3[RendererStyleFlags3[\"Important\"] = 1] = \"Important\";\n    RendererStyleFlags3[RendererStyleFlags3[\"DashCase\"] = 2] = \"DashCase\";\n})(RendererStyleFlags3 || (RendererStyleFlags3 = {}));\n/** Returns whether the `renderer` is a `ProceduralRenderer3` */\nfunction isProceduralRenderer(renderer) {\n    return !!(renderer.listen);\n}\nconst ɵ0$2 = (hostElement, rendererType) => {\n    return getDocument();\n};\nconst domRendererFactory3 = {\n    createRenderer: ɵ0$2\n};\n// Note: This hack is necessary so we don't erroneously get a circular dependency\n// failure based on types.\nconst unusedValueExportToPlacateAjd$2 = 1;\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * For efficiency reasons we often put several different data types (`RNode`, `LView`, `LContainer`)\n * in same location in `LView`. This is because we don't want to pre-allocate space for it\n * because the storage is sparse. This file contains utilities for dealing with such data types.\n *\n * How do we know what is stored at a given location in `LView`.\n * - `Array.isArray(value) === false` => `RNode` (The normal storage value)\n * - `Array.isArray(value) === true` => then the `value[0]` represents the wrapped value.\n *   - `typeof value[TYPE] === 'object'` => `LView`\n *      - This happens when we have a component at a given location\n *   - `typeof value[TYPE] === true` => `LContainer`\n *      - This happens when we have `LContainer` binding at a given location.\n *\n *\n * NOTE: it is assumed that `Array.isArray` and `typeof` operations are very efficient.\n */\n/**\n * Returns `RNode`.\n * @param value wrapped value of `RNode`, `LView`, `LContainer`\n */\nfunction unwrapRNode(value) {\n    while (Array.isArray(value)) {\n        value = value[HOST];\n    }\n    return value;\n}\n/**\n * Returns `LView` or `null` if not found.\n * @param value wrapped value of `RNode`, `LView`, `LContainer`\n */\nfunction unwrapLView(value) {\n    while (Array.isArray(value)) {\n        // This check is same as `isLView()` but we don't call at as we don't want to call\n        // `Array.isArray()` twice and give JITer more work for inlining.\n        if (typeof value[TYPE] === 'object')\n            return value;\n        value = value[HOST];\n    }\n    return null;\n}\n/**\n * Returns `LContainer` or `null` if not found.\n * @param value wrapped value of `RNode`, `LView`, `LContainer`\n */\nfunction unwrapLContainer(value) {\n    while (Array.isArray(value)) {\n        // This check is same as `isLContainer()` but we don't call at as we don't want to call\n        // `Array.isArray()` twice and give JITer more work for inlining.\n        if (value[TYPE] === true)\n            return value;\n        value = value[HOST];\n    }\n    return null;\n}\n/**\n * Retrieves an element value from the provided `viewData`, by unwrapping\n * from any containers, component views, or style contexts.\n */\nfunction getNativeByIndex(index, lView) {\n    return unwrapRNode(lView[index + HEADER_OFFSET]);\n}\n/**\n * Retrieve an `RNode` for a given `TNode` and `LView`.\n *\n * This function guarantees in dev mode to retrieve a non-null `RNode`.\n *\n * @param tNode\n * @param lView\n */\nfunction getNativeByTNode(tNode, lView) {\n    ngDevMode && assertTNodeForLView(tNode, lView);\n    ngDevMode && assertIndexInRange(lView, tNode.index);\n    const node = unwrapRNode(lView[tNode.index]);\n    ngDevMode && !isProceduralRenderer(lView[RENDERER]) && assertDomNode(node);\n    return node;\n}\n/**\n * Retrieve an `RNode` or `null` for a given `TNode` and `LView`.\n *\n * Some `TNode`s don't have associated `RNode`s. For example `Projection`\n *\n * @param tNode\n * @param lView\n */\nfunction getNativeByTNodeOrNull(tNode, lView) {\n    const index = tNode.index;\n    if (index !== -1) {\n        ngDevMode && assertTNodeForLView(tNode, lView);\n        const node = unwrapRNode(lView[index]);\n        ngDevMode && node !== null && !isProceduralRenderer(lView[RENDERER]) && assertDomNode(node);\n        return node;\n    }\n    return null;\n}\nfunction getTNode(tView, index) {\n    ngDevMode && assertGreaterThan(index, -1, 'wrong index for TNode');\n    ngDevMode && assertLessThan(index, tView.data.length, 'wrong index for TNode');\n    return tView.data[index + HEADER_OFFSET];\n}\n/** Retrieves a value from any `LView` or `TData`. */\nfunction load(view, index) {\n    ngDevMode && assertIndexInRange(view, index + HEADER_OFFSET);\n    return view[index + HEADER_OFFSET];\n}\nfunction getComponentLViewByIndex(nodeIndex, hostView) {\n    // Could be an LView or an LContainer. If LContainer, unwrap to find LView.\n    ngDevMode && assertIndexInRange(hostView, nodeIndex);\n    const slotValue = hostView[nodeIndex];\n    const lView = isLView(slotValue) ? slotValue : slotValue[HOST];\n    return lView;\n}\n/**\n * Returns the monkey-patch value data present on the target (which could be\n * a component, directive or a DOM node).\n */\nfunction readPatchedData(target) {\n    ngDevMode && assertDefined(target, 'Target expected');\n    return target[MONKEY_PATCH_KEY_NAME] || null;\n}\nfunction readPatchedLView(target) {\n    const value = readPatchedData(target);\n    if (value) {\n        return Array.isArray(value) ? value : value.lView;\n    }\n    return null;\n}\n/** Checks whether a given view is in creation mode */\nfunction isCreationMode(view) {\n    return (view[FLAGS] & 4 /* CreationMode */) === 4 /* CreationMode */;\n}\n/**\n * Returns a boolean for whether the view is attached to the change detection tree.\n *\n * Note: This determines whether a view should be checked, not whether it's inserted\n * into a container. For that, you'll want `viewAttachedToContainer` below.\n */\nfunction viewAttachedToChangeDetector(view) {\n    return (view[FLAGS] & 128 /* Attached */) === 128 /* Attached */;\n}\n/** Returns a boolean for whether the view is attached to a container. */\nfunction viewAttachedToContainer(view) {\n    return isLContainer(view[PARENT]);\n}\n/** Returns a constant from `TConstants` instance. */\nfunction getConstant(consts, index) {\n    return consts === null || index == null ? null : consts[index];\n}\n/**\n * Resets the pre-order hook flags of the view.\n * @param lView the LView on which the flags are reset\n */\nfunction resetPreOrderHookFlags(lView) {\n    lView[PREORDER_HOOK_FLAGS] = 0;\n}\n/**\n * Updates the `TRANSPLANTED_VIEWS_TO_REFRESH` counter on the `LContainer` as well as the parents\n * whose\n *  1. counter goes from 0 to 1, indicating that there is a new child that has a view to refresh\n *  or\n *  2. counter goes from 1 to 0, indicating there are no more descendant views to refresh\n */\nfunction updateTransplantedViewCount(lContainer, amount) {\n    lContainer[TRANSPLANTED_VIEWS_TO_REFRESH] += amount;\n    let viewOrContainer = lContainer;\n    let parent = lContainer[PARENT];\n    while (parent !== null &&\n        ((amount === 1 && viewOrContainer[TRANSPLANTED_VIEWS_TO_REFRESH] === 1) ||\n            (amount === -1 && viewOrContainer[TRANSPLANTED_VIEWS_TO_REFRESH] === 0))) {\n        parent[TRANSPLANTED_VIEWS_TO_REFRESH] += amount;\n        viewOrContainer = parent;\n        parent = parent[PARENT];\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst instructionState = {\n    lFrame: createLFrame(null),\n    bindingsEnabled: true,\n    checkNoChangesMode: false,\n};\nfunction getElementDepthCount() {\n    return instructionState.lFrame.elementDepthCount;\n}\nfunction increaseElementDepthCount() {\n    instructionState.lFrame.elementDepthCount++;\n}\nfunction decreaseElementDepthCount() {\n    instructionState.lFrame.elementDepthCount--;\n}\nfunction getBindingsEnabled() {\n    return instructionState.bindingsEnabled;\n}\n/**\n * Enables directive matching on elements.\n *\n *  * Example:\n * ```\n * <my-comp my-directive>\n *   Should match component / directive.\n * </my-comp>\n * <div ngNonBindable>\n *   <!-- ɵɵdisableBindings() -->\n *   <my-comp my-directive>\n *     Should not match component / directive because we are in ngNonBindable.\n *   </my-comp>\n *   <!-- ɵɵenableBindings() -->\n * </div>\n * ```\n *\n * @codeGenApi\n */\nfunction ɵɵenableBindings() {\n    instructionState.bindingsEnabled = true;\n}\n/**\n * Disables directive matching on element.\n *\n *  * Example:\n * ```\n * <my-comp my-directive>\n *   Should match component / directive.\n * </my-comp>\n * <div ngNonBindable>\n *   <!-- ɵɵdisableBindings() -->\n *   <my-comp my-directive>\n *     Should not match component / directive because we are in ngNonBindable.\n *   </my-comp>\n *   <!-- ɵɵenableBindings() -->\n * </div>\n * ```\n *\n * @codeGenApi\n */\nfunction ɵɵdisableBindings() {\n    instructionState.bindingsEnabled = false;\n}\n/**\n * Return the current `LView`.\n */\nfunction getLView() {\n    return instructionState.lFrame.lView;\n}\n/**\n * Return the current `TView`.\n */\nfunction getTView() {\n    return instructionState.lFrame.tView;\n}\n/**\n * Restores `contextViewData` to the given OpaqueViewState instance.\n *\n * Used in conjunction with the getCurrentView() instruction to save a snapshot\n * of the current view and restore it when listeners are invoked. This allows\n * walking the declaration view tree in listeners to get vars from parent views.\n *\n * @param viewToRestore The OpaqueViewState instance to restore.\n *\n * @codeGenApi\n */\nfunction ɵɵrestoreView(viewToRestore) {\n    instructionState.lFrame.contextLView = viewToRestore;\n}\nfunction getPreviousOrParentTNode() {\n    return instructionState.lFrame.previousOrParentTNode;\n}\nfunction setPreviousOrParentTNode(tNode, isParent) {\n    instructionState.lFrame.previousOrParentTNode = tNode;\n    instructionState.lFrame.isParent = isParent;\n}\nfunction getIsParent() {\n    return instructionState.lFrame.isParent;\n}\nfunction setIsNotParent() {\n    instructionState.lFrame.isParent = false;\n}\nfunction setIsParent() {\n    instructionState.lFrame.isParent = true;\n}\nfunction getContextLView() {\n    return instructionState.lFrame.contextLView;\n}\nfunction getCheckNoChangesMode() {\n    // TODO(misko): remove this from the LView since it is ngDevMode=true mode only.\n    return instructionState.checkNoChangesMode;\n}\nfunction setCheckNoChangesMode(mode) {\n    instructionState.checkNoChangesMode = mode;\n}\n// top level variables should not be exported for performance reasons (PERF_NOTES.md)\nfunction getBindingRoot() {\n    const lFrame = instructionState.lFrame;\n    let index = lFrame.bindingRootIndex;\n    if (index === -1) {\n        index = lFrame.bindingRootIndex = lFrame.tView.bindingStartIndex;\n    }\n    return index;\n}\nfunction getBindingIndex() {\n    return instructionState.lFrame.bindingIndex;\n}\nfunction setBindingIndex(value) {\n    return instructionState.lFrame.bindingIndex = value;\n}\nfunction nextBindingIndex() {\n    return instructionState.lFrame.bindingIndex++;\n}\nfunction incrementBindingIndex(count) {\n    const lFrame = instructionState.lFrame;\n    const index = lFrame.bindingIndex;\n    lFrame.bindingIndex = lFrame.bindingIndex + count;\n    return index;\n}\n/**\n * Set a new binding root index so that host template functions can execute.\n *\n * Bindings inside the host template are 0 index. But because we don't know ahead of time\n * how many host bindings we have we can't pre-compute them. For this reason they are all\n * 0 index and we just shift the root so that they match next available location in the LView.\n *\n * @param bindingRootIndex Root index for `hostBindings`\n * @param currentDirectiveIndex `TData[currentDirectiveIndex]` will point to the current directive\n *        whose `hostBindings` are being processed.\n */\nfunction setBindingRootForHostBindings(bindingRootIndex, currentDirectiveIndex) {\n    const lFrame = instructionState.lFrame;\n    lFrame.bindingIndex = lFrame.bindingRootIndex = bindingRootIndex;\n    setCurrentDirectiveIndex(currentDirectiveIndex);\n}\n/**\n * When host binding is executing this points to the directive index.\n * `TView.data[getCurrentDirectiveIndex()]` is `DirectiveDef`\n * `LView[getCurrentDirectiveIndex()]` is directive instance.\n */\nfunction getCurrentDirectiveIndex() {\n    return instructionState.lFrame.currentDirectiveIndex;\n}\n/**\n * Sets an index of a directive whose `hostBindings` are being processed.\n *\n * @param currentDirectiveIndex `TData` index where current directive instance can be found.\n */\nfunction setCurrentDirectiveIndex(currentDirectiveIndex) {\n    instructionState.lFrame.currentDirectiveIndex = currentDirectiveIndex;\n}\n/**\n * Retrieve the current `DirectiveDef` which is active when `hostBindings` instruction is being\n * executed.\n *\n * @param tData Current `TData` where the `DirectiveDef` will be looked up at.\n */\nfunction getCurrentDirectiveDef(tData) {\n    const currentDirectiveIndex = instructionState.lFrame.currentDirectiveIndex;\n    return currentDirectiveIndex === -1 ? null : tData[currentDirectiveIndex];\n}\nfunction getCurrentQueryIndex() {\n    return instructionState.lFrame.currentQueryIndex;\n}\nfunction setCurrentQueryIndex(value) {\n    instructionState.lFrame.currentQueryIndex = value;\n}\n/**\n * This is a light weight version of the `enterView` which is needed by the DI system.\n * @param newView\n * @param tNode\n */\nfunction enterDI(newView, tNode) {\n    ngDevMode && assertLViewOrUndefined(newView);\n    const newLFrame = allocLFrame();\n    instructionState.lFrame = newLFrame;\n    newLFrame.previousOrParentTNode = tNode;\n    newLFrame.lView = newView;\n}\n/**\n * Swap the current lView with a new lView.\n *\n * For performance reasons we store the lView in the top level of the module.\n * This way we minimize the number of properties to read. Whenever a new view\n * is entered we have to store the lView for later, and when the view is\n * exited the state has to be restored\n *\n * @param newView New lView to become active\n * @param tNode Element to which the View is a child of\n * @returns the previously active lView;\n */\nfunction enterView(newView, tNode) {\n    ngDevMode && assertLViewOrUndefined(newView);\n    const newLFrame = allocLFrame();\n    if (ngDevMode) {\n        assertEqual(newLFrame.isParent, true, 'Expected clean LFrame');\n        assertEqual(newLFrame.lView, null, 'Expected clean LFrame');\n        assertEqual(newLFrame.tView, null, 'Expected clean LFrame');\n        assertEqual(newLFrame.selectedIndex, 0, 'Expected clean LFrame');\n        assertEqual(newLFrame.elementDepthCount, 0, 'Expected clean LFrame');\n        assertEqual(newLFrame.currentDirectiveIndex, -1, 'Expected clean LFrame');\n        assertEqual(newLFrame.currentNamespace, null, 'Expected clean LFrame');\n        assertEqual(newLFrame.bindingRootIndex, -1, 'Expected clean LFrame');\n        assertEqual(newLFrame.currentQueryIndex, 0, 'Expected clean LFrame');\n    }\n    const tView = newView[TVIEW];\n    instructionState.lFrame = newLFrame;\n    newLFrame.previousOrParentTNode = tNode;\n    newLFrame.lView = newView;\n    newLFrame.tView = tView;\n    newLFrame.contextLView = newView;\n    newLFrame.bindingIndex = tView.bindingStartIndex;\n}\n/**\n * Allocates next free LFrame. This function tries to reuse the `LFrame`s to lower memory pressure.\n */\nfunction allocLFrame() {\n    const currentLFrame = instructionState.lFrame;\n    const childLFrame = currentLFrame === null ? null : currentLFrame.child;\n    const newLFrame = childLFrame === null ? createLFrame(currentLFrame) : childLFrame;\n    return newLFrame;\n}\nfunction createLFrame(parent) {\n    const lFrame = {\n        previousOrParentTNode: null,\n        isParent: true,\n        lView: null,\n        tView: null,\n        selectedIndex: 0,\n        contextLView: null,\n        elementDepthCount: 0,\n        currentNamespace: null,\n        currentDirectiveIndex: -1,\n        bindingRootIndex: -1,\n        bindingIndex: -1,\n        currentQueryIndex: 0,\n        parent: parent,\n        child: null,\n    };\n    parent !== null && (parent.child = lFrame); // link the new LFrame for reuse.\n    return lFrame;\n}\n/**\n * A lightweight version of leave which is used with DI.\n *\n * This function only resets `previousOrParentTNode` and `LView` as those are the only properties\n * used with DI (`enterDI()`).\n *\n * NOTE: This function is reexported as `leaveDI`. However `leaveDI` has return type of `void` where\n * as `leaveViewLight` has `LFrame`. This is so that `leaveViewLight` can be used in `leaveView`.\n */\nfunction leaveViewLight() {\n    const oldLFrame = instructionState.lFrame;\n    instructionState.lFrame = oldLFrame.parent;\n    oldLFrame.previousOrParentTNode = null;\n    oldLFrame.lView = null;\n    return oldLFrame;\n}\n/**\n * This is a lightweight version of the `leaveView` which is needed by the DI system.\n *\n * NOTE: this function is an alias so that we can change the type of the function to have `void`\n * return type.\n */\nconst leaveDI = leaveViewLight;\n/**\n * Leave the current `LView`\n *\n * This pops the `LFrame` with the associated `LView` from the stack.\n *\n * IMPORTANT: We must zero out the `LFrame` values here otherwise they will be retained. This is\n * because for performance reasons we don't release `LFrame` but rather keep it for next use.\n */\nfunction leaveView() {\n    const oldLFrame = leaveViewLight();\n    oldLFrame.isParent = true;\n    oldLFrame.tView = null;\n    oldLFrame.selectedIndex = 0;\n    oldLFrame.contextLView = null;\n    oldLFrame.elementDepthCount = 0;\n    oldLFrame.currentDirectiveIndex = -1;\n    oldLFrame.currentNamespace = null;\n    oldLFrame.bindingRootIndex = -1;\n    oldLFrame.bindingIndex = -1;\n    oldLFrame.currentQueryIndex = 0;\n}\nfunction nextContextImpl(level) {\n    const contextLView = instructionState.lFrame.contextLView =\n        walkUpViews(level, instructionState.lFrame.contextLView);\n    return contextLView[CONTEXT];\n}\nfunction walkUpViews(nestingLevel, currentView) {\n    while (nestingLevel > 0) {\n        ngDevMode &&\n            assertDefined(currentView[DECLARATION_VIEW], 'Declaration view should be defined if nesting level is greater than 0.');\n        currentView = currentView[DECLARATION_VIEW];\n        nestingLevel--;\n    }\n    return currentView;\n}\n/**\n * Gets the currently selected element index.\n *\n * Used with {@link property} instruction (and more in the future) to identify the index in the\n * current `LView` to act on.\n */\nfunction getSelectedIndex() {\n    return instructionState.lFrame.selectedIndex;\n}\n/**\n * Sets the most recent index passed to {@link select}\n *\n * Used with {@link property} instruction (and more in the future) to identify the index in the\n * current `LView` to act on.\n *\n * (Note that if an \"exit function\" was set earlier (via `setElementExitFn()`) then that will be\n * run if and when the provided `index` value is different from the current selected index value.)\n */\nfunction setSelectedIndex(index) {\n    instructionState.lFrame.selectedIndex = index;\n}\n/**\n * Gets the `tNode` that represents currently selected element.\n */\nfunction getSelectedTNode() {\n    const lFrame = instructionState.lFrame;\n    return getTNode(lFrame.tView, lFrame.selectedIndex);\n}\n/**\n * Sets the namespace used to create elements to `'http://www.w3.org/2000/svg'` in global state.\n *\n * @codeGenApi\n */\nfunction ɵɵnamespaceSVG() {\n    instructionState.lFrame.currentNamespace = SVG_NAMESPACE;\n}\n/**\n * Sets the namespace used to create elements to `'http://www.w3.org/1998/MathML/'` in global state.\n *\n * @codeGenApi\n */\nfunction ɵɵnamespaceMathML() {\n    instructionState.lFrame.currentNamespace = MATH_ML_NAMESPACE;\n}\n/**\n * Sets the namespace used to create elements to `null`, which forces element creation to use\n * `createElement` rather than `createElementNS`.\n *\n * @codeGenApi\n */\nfunction ɵɵnamespaceHTML() {\n    namespaceHTMLInternal();\n}\n/**\n * Sets the namespace used to create elements to `null`, which forces element creation to use\n * `createElement` rather than `createElementNS`.\n */\nfunction namespaceHTMLInternal() {\n    instructionState.lFrame.currentNamespace = null;\n}\nfunction getNamespace() {\n    return instructionState.lFrame.currentNamespace;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Adds all directive lifecycle hooks from the given `DirectiveDef` to the given `TView`.\n *\n * Must be run *only* on the first template pass.\n *\n * Sets up the pre-order hooks on the provided `tView`,\n * see {@link HookData} for details about the data structure.\n *\n * @param directiveIndex The index of the directive in LView\n * @param directiveDef The definition containing the hooks to setup in tView\n * @param tView The current TView\n */\nfunction registerPreOrderHooks(directiveIndex, directiveDef, tView) {\n    ngDevMode && assertFirstCreatePass(tView);\n    const { ngOnChanges, ngOnInit, ngDoCheck } = directiveDef.type.prototype;\n    if (ngOnChanges) {\n        const wrappedOnChanges = NgOnChangesFeatureImpl(directiveDef);\n        (tView.preOrderHooks || (tView.preOrderHooks = [])).push(directiveIndex, wrappedOnChanges);\n        (tView.preOrderCheckHooks || (tView.preOrderCheckHooks = []))\n            .push(directiveIndex, wrappedOnChanges);\n    }\n    if (ngOnInit) {\n        (tView.preOrderHooks || (tView.preOrderHooks = [])).push(0 - directiveIndex, ngOnInit);\n    }\n    if (ngDoCheck) {\n        (tView.preOrderHooks || (tView.preOrderHooks = [])).push(directiveIndex, ngDoCheck);\n        (tView.preOrderCheckHooks || (tView.preOrderCheckHooks = [])).push(directiveIndex, ngDoCheck);\n    }\n}\n/**\n *\n * Loops through the directives on the provided `tNode` and queues hooks to be\n * run that are not initialization hooks.\n *\n * Should be executed during `elementEnd()` and similar to\n * preserve hook execution order. Content, view, and destroy hooks for projected\n * components and directives must be called *before* their hosts.\n *\n * Sets up the content, view, and destroy hooks on the provided `tView`,\n * see {@link HookData} for details about the data structure.\n *\n * NOTE: This does not set up `onChanges`, `onInit` or `doCheck`, those are set up\n * separately at `elementStart`.\n *\n * @param tView The current TView\n * @param tNode The TNode whose directives are to be searched for hooks to queue\n */\nfunction registerPostOrderHooks(tView, tNode) {\n    ngDevMode && assertFirstCreatePass(tView);\n    // It's necessary to loop through the directives at elementEnd() (rather than processing in\n    // directiveCreate) so we can preserve the current hook order. Content, view, and destroy\n    // hooks for projected components and directives must be called *before* their hosts.\n    for (let i = tNode.directiveStart, end = tNode.directiveEnd; i < end; i++) {\n        const directiveDef = tView.data[i];\n        const lifecycleHooks = directiveDef.type.prototype;\n        const { ngAfterContentInit, ngAfterContentChecked, ngAfterViewInit, ngAfterViewChecked, ngOnDestroy } = lifecycleHooks;\n        if (ngAfterContentInit) {\n            (tView.contentHooks || (tView.contentHooks = [])).push(-i, ngAfterContentInit);\n        }\n        if (ngAfterContentChecked) {\n            (tView.contentHooks || (tView.contentHooks = [])).push(i, ngAfterContentChecked);\n            (tView.contentCheckHooks || (tView.contentCheckHooks = [])).push(i, ngAfterContentChecked);\n        }\n        if (ngAfterViewInit) {\n            (tView.viewHooks || (tView.viewHooks = [])).push(-i, ngAfterViewInit);\n        }\n        if (ngAfterViewChecked) {\n            (tView.viewHooks || (tView.viewHooks = [])).push(i, ngAfterViewChecked);\n            (tView.viewCheckHooks || (tView.viewCheckHooks = [])).push(i, ngAfterViewChecked);\n        }\n        if (ngOnDestroy != null) {\n            (tView.destroyHooks || (tView.destroyHooks = [])).push(i, ngOnDestroy);\n        }\n    }\n}\n/**\n * Executing hooks requires complex logic as we need to deal with 2 constraints.\n *\n * 1. Init hooks (ngOnInit, ngAfterContentInit, ngAfterViewInit) must all be executed once and only\n * once, across many change detection cycles. This must be true even if some hooks throw, or if\n * some recursively trigger a change detection cycle.\n * To solve that, it is required to track the state of the execution of these init hooks.\n * This is done by storing and maintaining flags in the view: the {@link InitPhaseState},\n * and the index within that phase. They can be seen as a cursor in the following structure:\n * [[onInit1, onInit2], [afterContentInit1], [afterViewInit1, afterViewInit2, afterViewInit3]]\n * They are are stored as flags in LView[FLAGS].\n *\n * 2. Pre-order hooks can be executed in batches, because of the select instruction.\n * To be able to pause and resume their execution, we also need some state about the hook's array\n * that is being processed:\n * - the index of the next hook to be executed\n * - the number of init hooks already found in the processed part of the  array\n * They are are stored as flags in LView[PREORDER_HOOK_FLAGS].\n */\n/**\n * Executes pre-order check hooks ( OnChanges, DoChanges) given a view where all the init hooks were\n * executed once. This is a light version of executeInitAndCheckPreOrderHooks where we can skip read\n * / write of the init-hooks related flags.\n * @param lView The LView where hooks are defined\n * @param hooks Hooks to be run\n * @param nodeIndex 3 cases depending on the value:\n * - undefined: all hooks from the array should be executed (post-order case)\n * - null: execute hooks only from the saved index until the end of the array (pre-order case, when\n * flushing the remaining hooks)\n * - number: execute hooks only from the saved index until that node index exclusive (pre-order\n * case, when executing select(number))\n */\nfunction executeCheckHooks(lView, hooks, nodeIndex) {\n    callHooks(lView, hooks, 3 /* InitPhaseCompleted */, nodeIndex);\n}\n/**\n * Executes post-order init and check hooks (one of AfterContentInit, AfterContentChecked,\n * AfterViewInit, AfterViewChecked) given a view where there are pending init hooks to be executed.\n * @param lView The LView where hooks are defined\n * @param hooks Hooks to be run\n * @param initPhase A phase for which hooks should be run\n * @param nodeIndex 3 cases depending on the value:\n * - undefined: all hooks from the array should be executed (post-order case)\n * - null: execute hooks only from the saved index until the end of the array (pre-order case, when\n * flushing the remaining hooks)\n * - number: execute hooks only from the saved index until that node index exclusive (pre-order\n * case, when executing select(number))\n */\nfunction executeInitAndCheckHooks(lView, hooks, initPhase, nodeIndex) {\n    ngDevMode &&\n        assertNotEqual(initPhase, 3 /* InitPhaseCompleted */, 'Init pre-order hooks should not be called more than once');\n    if ((lView[FLAGS] & 3 /* InitPhaseStateMask */) === initPhase) {\n        callHooks(lView, hooks, initPhase, nodeIndex);\n    }\n}\nfunction incrementInitPhaseFlags(lView, initPhase) {\n    ngDevMode &&\n        assertNotEqual(initPhase, 3 /* InitPhaseCompleted */, 'Init hooks phase should not be incremented after all init hooks have been run.');\n    let flags = lView[FLAGS];\n    if ((flags & 3 /* InitPhaseStateMask */) === initPhase) {\n        flags &= 2047 /* IndexWithinInitPhaseReset */;\n        flags += 1 /* InitPhaseStateIncrementer */;\n        lView[FLAGS] = flags;\n    }\n}\n/**\n * Calls lifecycle hooks with their contexts, skipping init hooks if it's not\n * the first LView pass\n *\n * @param currentView The current view\n * @param arr The array in which the hooks are found\n * @param initPhaseState the current state of the init phase\n * @param currentNodeIndex 3 cases depending on the value:\n * - undefined: all hooks from the array should be executed (post-order case)\n * - null: execute hooks only from the saved index until the end of the array (pre-order case, when\n * flushing the remaining hooks)\n * - number: execute hooks only from the saved index until that node index exclusive (pre-order\n * case, when executing select(number))\n */\nfunction callHooks(currentView, arr, initPhase, currentNodeIndex) {\n    ngDevMode &&\n        assertEqual(getCheckNoChangesMode(), false, 'Hooks should never be run in the check no changes mode.');\n    const startIndex = currentNodeIndex !== undefined ?\n        (currentView[PREORDER_HOOK_FLAGS] & 65535 /* IndexOfTheNextPreOrderHookMaskMask */) :\n        0;\n    const nodeIndexLimit = currentNodeIndex != null ? currentNodeIndex : -1;\n    let lastNodeIndexFound = 0;\n    for (let i = startIndex; i < arr.length; i++) {\n        const hook = arr[i + 1];\n        if (typeof hook === 'number') {\n            lastNodeIndexFound = arr[i];\n            if (currentNodeIndex != null && lastNodeIndexFound >= currentNodeIndex) {\n                break;\n            }\n        }\n        else {\n            const isInitHook = arr[i] < 0;\n            if (isInitHook)\n                currentView[PREORDER_HOOK_FLAGS] += 65536 /* NumberOfInitHooksCalledIncrementer */;\n            if (lastNodeIndexFound < nodeIndexLimit || nodeIndexLimit == -1) {\n                callHook(currentView, initPhase, arr, i);\n                currentView[PREORDER_HOOK_FLAGS] =\n                    (currentView[PREORDER_HOOK_FLAGS] & 4294901760 /* NumberOfInitHooksCalledMask */) + i +\n                        2;\n            }\n            i++;\n        }\n    }\n}\n/**\n * Execute one hook against the current `LView`.\n *\n * @param currentView The current view\n * @param initPhaseState the current state of the init phase\n * @param arr The array in which the hooks are found\n * @param i The current index within the hook data array\n */\nfunction callHook(currentView, initPhase, arr, i) {\n    const isInitHook = arr[i] < 0;\n    const hook = arr[i + 1];\n    const directiveIndex = isInitHook ? -arr[i] : arr[i];\n    const directive = currentView[directiveIndex];\n    if (isInitHook) {\n        const indexWithintInitPhase = currentView[FLAGS] >> 11 /* IndexWithinInitPhaseShift */;\n        // The init phase state must be always checked here as it may have been recursively\n        // updated\n        if (indexWithintInitPhase <\n            (currentView[PREORDER_HOOK_FLAGS] >> 16 /* NumberOfInitHooksCalledShift */) &&\n            (currentView[FLAGS] & 3 /* InitPhaseStateMask */) === initPhase) {\n            currentView[FLAGS] += 2048 /* IndexWithinInitPhaseIncrementer */;\n            hook.call(directive);\n        }\n    }\n    else {\n        hook.call(directive);\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst TNODE = 8;\nconst PARENT_INJECTOR = 8;\nconst INJECTOR_BLOOM_PARENT_SIZE = 9;\nconst NO_PARENT_INJECTOR = -1;\n/**\n * Each injector is saved in 9 contiguous slots in `LView` and 9 contiguous slots in\n * `TView.data`. This allows us to store information about the current node's tokens (which\n * can be shared in `TView`) as well as the tokens of its ancestor nodes (which cannot be\n * shared, so they live in `LView`).\n *\n * Each of these slots (aside from the last slot) contains a bloom filter. This bloom filter\n * determines whether a directive is available on the associated node or not. This prevents us\n * from searching the directives array at this level unless it's probable the directive is in it.\n *\n * See: https://en.wikipedia.org/wiki/Bloom_filter for more about bloom filters.\n *\n * Because all injectors have been flattened into `LView` and `TViewData`, they cannot typed\n * using interfaces as they were previously. The start index of each `LInjector` and `TInjector`\n * will differ based on where it is flattened into the main array, so it's not possible to know\n * the indices ahead of time and save their types here. The interfaces are still included here\n * for documentation purposes.\n *\n * export interface LInjector extends Array<any> {\n *\n *    // Cumulative bloom for directive IDs 0-31  (IDs are % BLOOM_SIZE)\n *    [0]: number;\n *\n *    // Cumulative bloom for directive IDs 32-63\n *    [1]: number;\n *\n *    // Cumulative bloom for directive IDs 64-95\n *    [2]: number;\n *\n *    // Cumulative bloom for directive IDs 96-127\n *    [3]: number;\n *\n *    // Cumulative bloom for directive IDs 128-159\n *    [4]: number;\n *\n *    // Cumulative bloom for directive IDs 160 - 191\n *    [5]: number;\n *\n *    // Cumulative bloom for directive IDs 192 - 223\n *    [6]: number;\n *\n *    // Cumulative bloom for directive IDs 224 - 255\n *    [7]: number;\n *\n *    // We need to store a reference to the injector's parent so DI can keep looking up\n *    // the injector tree until it finds the dependency it's looking for.\n *    [PARENT_INJECTOR]: number;\n * }\n *\n * export interface TInjector extends Array<any> {\n *\n *    // Shared node bloom for directive IDs 0-31  (IDs are % BLOOM_SIZE)\n *    [0]: number;\n *\n *    // Shared node bloom for directive IDs 32-63\n *    [1]: number;\n *\n *    // Shared node bloom for directive IDs 64-95\n *    [2]: number;\n *\n *    // Shared node bloom for directive IDs 96-127\n *    [3]: number;\n *\n *    // Shared node bloom for directive IDs 128-159\n *    [4]: number;\n *\n *    // Shared node bloom for directive IDs 160 - 191\n *    [5]: number;\n *\n *    // Shared node bloom for directive IDs 192 - 223\n *    [6]: number;\n *\n *    // Shared node bloom for directive IDs 224 - 255\n *    [7]: number;\n *\n *    // Necessary to find directive indices for a particular node.\n *    [TNODE]: TElementNode|TElementContainerNode|TContainerNode;\n *  }\n */\n/**\n * Factory for creating instances of injectors in the NodeInjector.\n *\n * This factory is complicated by the fact that it can resolve `multi` factories as well.\n *\n * NOTE: Some of the fields are optional which means that this class has two hidden classes.\n * - One without `multi` support (most common)\n * - One with `multi` values, (rare).\n *\n * Since VMs can cache up to 4 inline hidden classes this is OK.\n *\n * - Single factory: Only `resolving` and `factory` is defined.\n * - `providers` factory: `componentProviders` is a number and `index = -1`.\n * - `viewProviders` factory: `componentProviders` is a number and `index` points to `providers`.\n */\nclass NodeInjectorFactory {\n    constructor(\n    /**\n     * Factory to invoke in order to create a new instance.\n     */\n    factory, \n    /**\n     * Set to `true` if the token is declared in `viewProviders` (or if it is component).\n     */\n    isViewProvider, injectImplementation) {\n        this.factory = factory;\n        /**\n         * Marker set to true during factory invocation to see if we get into recursive loop.\n         * Recursive loop causes an error to be displayed.\n         */\n        this.resolving = false;\n        this.canSeeViewProviders = isViewProvider;\n        this.injectImpl = injectImplementation;\n    }\n}\nfunction isFactory(obj) {\n    return obj instanceof NodeInjectorFactory;\n}\n// Note: This hack is necessary so we don't erroneously get a circular dependency\n// failure based on types.\nconst unusedValueExportToPlacateAjd$3 = 1;\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction assertNodeType(tNode, type) {\n    assertDefined(tNode, 'should be called with a TNode');\n    assertEqual(tNode.type, type, `should be a ${typeName(type)}`);\n}\nfunction assertNodeOfPossibleTypes(tNode, types, message) {\n    assertDefined(tNode, 'should be called with a TNode');\n    const found = types.some(type => tNode.type === type);\n    assertEqual(found, true, message !== null && message !== void 0 ? message : `Should be one of ${types.map(typeName).join(', ')} but got ${typeName(tNode.type)}`);\n}\nfunction assertNodeNotOfTypes(tNode, types, message) {\n    assertDefined(tNode, 'should be called with a TNode');\n    const found = types.some(type => tNode.type === type);\n    assertEqual(found, false, message !== null && message !== void 0 ? message : `Should not be one of ${types.map(typeName).join(', ')} but got ${typeName(tNode.type)}`);\n}\nfunction typeName(type) {\n    if (type == 1 /* Projection */)\n        return 'Projection';\n    if (type == 0 /* Container */)\n        return 'Container';\n    if (type == 5 /* IcuContainer */)\n        return 'IcuContainer';\n    if (type == 2 /* View */)\n        return 'View';\n    if (type == 3 /* Element */)\n        return 'Element';\n    if (type == 4 /* ElementContainer */)\n        return 'ElementContainer';\n    return '<unknown>';\n}\n\n/**\n * Assigns all attribute values to the provided element via the inferred renderer.\n *\n * This function accepts two forms of attribute entries:\n *\n * default: (key, value):\n *  attrs = [key1, value1, key2, value2]\n *\n * namespaced: (NAMESPACE_MARKER, uri, name, value)\n *  attrs = [NAMESPACE_MARKER, uri, name, value, NAMESPACE_MARKER, uri, name, value]\n *\n * The `attrs` array can contain a mix of both the default and namespaced entries.\n * The \"default\" values are set without a marker, but if the function comes across\n * a marker value then it will attempt to set a namespaced value. If the marker is\n * not of a namespaced value then the function will quit and return the index value\n * where it stopped during the iteration of the attrs array.\n *\n * See [AttributeMarker] to understand what the namespace marker value is.\n *\n * Note that this instruction does not support assigning style and class values to\n * an element. See `elementStart` and `elementHostAttrs` to learn how styling values\n * are applied to an element.\n * @param renderer The renderer to be used\n * @param native The element that the attributes will be assigned to\n * @param attrs The attribute array of values that will be assigned to the element\n * @returns the index value that was last accessed in the attributes array\n */\nfunction setUpAttributes(renderer, native, attrs) {\n    const isProc = isProceduralRenderer(renderer);\n    let i = 0;\n    while (i < attrs.length) {\n        const value = attrs[i];\n        if (typeof value === 'number') {\n            // only namespaces are supported. Other value types (such as style/class\n            // entries) are not supported in this function.\n            if (value !== 0 /* NamespaceURI */) {\n                break;\n            }\n            // we just landed on the marker value ... therefore\n            // we should skip to the next entry\n            i++;\n            const namespaceURI = attrs[i++];\n            const attrName = attrs[i++];\n            const attrVal = attrs[i++];\n            ngDevMode && ngDevMode.rendererSetAttribute++;\n            isProc ?\n                renderer.setAttribute(native, attrName, attrVal, namespaceURI) :\n                native.setAttributeNS(namespaceURI, attrName, attrVal);\n        }\n        else {\n            // attrName is string;\n            const attrName = value;\n            const attrVal = attrs[++i];\n            // Standard attributes\n            ngDevMode && ngDevMode.rendererSetAttribute++;\n            if (isAnimationProp(attrName)) {\n                if (isProc) {\n                    renderer.setProperty(native, attrName, attrVal);\n                }\n            }\n            else {\n                isProc ?\n                    renderer.setAttribute(native, attrName, attrVal) :\n                    native.setAttribute(attrName, attrVal);\n            }\n            i++;\n        }\n    }\n    // another piece of code may iterate over the same attributes array. Therefore\n    // it may be helpful to return the exact spot where the attributes array exited\n    // whether by running into an unsupported marker or if all the static values were\n    // iterated over.\n    return i;\n}\n/**\n * Test whether the given value is a marker that indicates that the following\n * attribute values in a `TAttributes` array are only the names of attributes,\n * and not name-value pairs.\n * @param marker The attribute marker to test.\n * @returns true if the marker is a \"name-only\" marker (e.g. `Bindings`, `Template` or `I18n`).\n */\nfunction isNameOnlyAttributeMarker(marker) {\n    return marker === 3 /* Bindings */ || marker === 4 /* Template */ ||\n        marker === 6 /* I18n */;\n}\nfunction isAnimationProp(name) {\n    // Perf note: accessing charCodeAt to check for the first character of a string is faster as\n    // compared to accessing a character at index 0 (ex. name[0]). The main reason for this is that\n    // charCodeAt doesn't allocate memory to return a substring.\n    return name.charCodeAt(0) === 64 /* AT_SIGN */;\n}\n/**\n * Merges `src` `TAttributes` into `dst` `TAttributes` removing any duplicates in the process.\n *\n * This merge function keeps the order of attrs same.\n *\n * @param dst Location of where the merged `TAttributes` should end up.\n * @param src `TAttributes` which should be appended to `dst`\n */\nfunction mergeHostAttrs(dst, src) {\n    if (src === null || src.length === 0) {\n        // do nothing\n    }\n    else if (dst === null || dst.length === 0) {\n        // We have source, but dst is empty, just make a copy.\n        dst = src.slice();\n    }\n    else {\n        let srcMarker = -1 /* ImplicitAttributes */;\n        for (let i = 0; i < src.length; i++) {\n            const item = src[i];\n            if (typeof item === 'number') {\n                srcMarker = item;\n            }\n            else {\n                if (srcMarker === 0 /* NamespaceURI */) {\n                    // Case where we need to consume `key1`, `key2`, `value` items.\n                }\n                else if (srcMarker === -1 /* ImplicitAttributes */ ||\n                    srcMarker === 2 /* Styles */) {\n                    // Case where we have to consume `key1` and `value` only.\n                    mergeHostAttribute(dst, srcMarker, item, null, src[++i]);\n                }\n                else {\n                    // Case where we have to consume `key1` only.\n                    mergeHostAttribute(dst, srcMarker, item, null, null);\n                }\n            }\n        }\n    }\n    return dst;\n}\n/**\n * Append `key`/`value` to existing `TAttributes` taking region marker and duplicates into account.\n *\n * @param dst `TAttributes` to append to.\n * @param marker Region where the `key`/`value` should be added.\n * @param key1 Key to add to `TAttributes`\n * @param key2 Key to add to `TAttributes` (in case of `AttributeMarker.NamespaceURI`)\n * @param value Value to add or to overwrite to `TAttributes` Only used if `marker` is not Class.\n */\nfunction mergeHostAttribute(dst, marker, key1, key2, value) {\n    let i = 0;\n    // Assume that new markers will be inserted at the end.\n    let markerInsertPosition = dst.length;\n    // scan until correct type.\n    if (marker === -1 /* ImplicitAttributes */) {\n        markerInsertPosition = -1;\n    }\n    else {\n        while (i < dst.length) {\n            const dstValue = dst[i++];\n            if (typeof dstValue === 'number') {\n                if (dstValue === marker) {\n                    markerInsertPosition = -1;\n                    break;\n                }\n                else if (dstValue > marker) {\n                    // We need to save this as we want the markers to be inserted in specific order.\n                    markerInsertPosition = i - 1;\n                    break;\n                }\n            }\n        }\n    }\n    // search until you find place of insertion\n    while (i < dst.length) {\n        const item = dst[i];\n        if (typeof item === 'number') {\n            // since `i` started as the index after the marker, we did not find it if we are at the next\n            // marker\n            break;\n        }\n        else if (item === key1) {\n            // We already have same token\n            if (key2 === null) {\n                if (value !== null) {\n                    dst[i + 1] = value;\n                }\n                return;\n            }\n            else if (key2 === dst[i + 1]) {\n                dst[i + 2] = value;\n                return;\n            }\n        }\n        // Increment counter.\n        i++;\n        if (key2 !== null)\n            i++;\n        if (value !== null)\n            i++;\n    }\n    // insert at location.\n    if (markerInsertPosition !== -1) {\n        dst.splice(markerInsertPosition, 0, marker);\n        i = markerInsertPosition + 1;\n    }\n    dst.splice(i++, 0, key1);\n    if (key2 !== null) {\n        dst.splice(i++, 0, key2);\n    }\n    if (value !== null) {\n        dst.splice(i++, 0, value);\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/// Parent Injector Utils ///////////////////////////////////////////////////////////////\nfunction hasParentInjector(parentLocation) {\n    return parentLocation !== NO_PARENT_INJECTOR;\n}\nfunction getParentInjectorIndex(parentLocation) {\n    return parentLocation & 32767 /* InjectorIndexMask */;\n}\nfunction getParentInjectorViewOffset(parentLocation) {\n    return parentLocation >> 16 /* ViewOffsetShift */;\n}\n/**\n * Unwraps a parent injector location number to find the view offset from the current injector,\n * then walks up the declaration view tree until the view is found that contains the parent\n * injector.\n *\n * @param location The location of the parent injector, which contains the view offset\n * @param startView The LView instance from which to start walking up the view tree\n * @returns The LView instance that contains the parent injector\n */\nfunction getParentInjectorView(location, startView) {\n    let viewOffset = getParentInjectorViewOffset(location);\n    let parentView = startView;\n    // For most cases, the parent injector can be found on the host node (e.g. for component\n    // or container), but we must keep the loop here to support the rarer case of deeply nested\n    // <ng-template> tags or inline views, where the parent injector might live many views\n    // above the child injector.\n    while (viewOffset > 0) {\n        parentView = parentView[DECLARATION_VIEW];\n        viewOffset--;\n    }\n    return parentView;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Used for stringify render output in Ivy.\n * Important! This function is very performance-sensitive and we should\n * be extra careful not to introduce megamorphic reads in it.\n */\nfunction renderStringify(value) {\n    if (typeof value === 'string')\n        return value;\n    if (value == null)\n        return '';\n    return '' + value;\n}\n/**\n * Used to stringify a value so that it can be displayed in an error message.\n * Important! This function contains a megamorphic read and should only be\n * used for error messages.\n */\nfunction stringifyForError(value) {\n    if (typeof value === 'function')\n        return value.name || value.toString();\n    if (typeof value === 'object' && value != null && typeof value.type === 'function') {\n        return value.type.name || value.type.toString();\n    }\n    return renderStringify(value);\n}\nconst ɵ0$3 = () => (typeof requestAnimationFrame !== 'undefined' &&\n    requestAnimationFrame || // browser only\n    setTimeout // everything else\n)\n    .bind(_global);\nconst defaultScheduler = (ɵ0$3)();\n/**\n *\n * @codeGenApi\n */\nfunction ɵɵresolveWindow(element) {\n    return { name: 'window', target: element.ownerDocument.defaultView };\n}\n/**\n *\n * @codeGenApi\n */\nfunction ɵɵresolveDocument(element) {\n    return { name: 'document', target: element.ownerDocument };\n}\n/**\n *\n * @codeGenApi\n */\nfunction ɵɵresolveBody(element) {\n    return { name: 'body', target: element.ownerDocument.body };\n}\n/**\n * The special delimiter we use to separate property names, prefixes, and suffixes\n * in property binding metadata. See storeBindingMetadata().\n *\n * We intentionally use the Unicode \"REPLACEMENT CHARACTER\" (U+FFFD) as a delimiter\n * because it is a very uncommon character that is unlikely to be part of a user's\n * property names or interpolation strings. If it is in fact used in a property\n * binding, DebugElement.properties will not return the correct value for that\n * binding. However, there should be no runtime effect for real applications.\n *\n * This character is typically rendered as a question mark inside of a diamond.\n * See https://en.wikipedia.org/wiki/Specials_(Unicode_block)\n *\n */\nconst INTERPOLATION_DELIMITER = `�`;\n/**\n * Unwrap a value which might be behind a closure (for forward declaration reasons).\n */\nfunction maybeUnwrapFn(value) {\n    if (value instanceof Function) {\n        return value();\n    }\n    else {\n        return value;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Defines if the call to `inject` should include `viewProviders` in its resolution.\n *\n * This is set to true when we try to instantiate a component. This value is reset in\n * `getNodeInjectable` to a value which matches the declaration location of the token about to be\n * instantiated. This is done so that if we are injecting a token which was declared outside of\n * `viewProviders` we don't accidentally pull `viewProviders` in.\n *\n * Example:\n *\n * ```\n * @Injectable()\n * class MyService {\n *   constructor(public value: String) {}\n * }\n *\n * @Component({\n *   providers: [\n *     MyService,\n *     {provide: String, value: 'providers' }\n *   ]\n *   viewProviders: [\n *     {provide: String, value: 'viewProviders'}\n *   ]\n * })\n * class MyComponent {\n *   constructor(myService: MyService, value: String) {\n *     // We expect that Component can see into `viewProviders`.\n *     expect(value).toEqual('viewProviders');\n *     // `MyService` was not declared in `viewProviders` hence it can't see it.\n *     expect(myService.value).toEqual('providers');\n *   }\n * }\n *\n * ```\n */\nlet includeViewProviders = true;\nfunction setIncludeViewProviders(v) {\n    const oldValue = includeViewProviders;\n    includeViewProviders = v;\n    return oldValue;\n}\n/**\n * The number of slots in each bloom filter (used by DI). The larger this number, the fewer\n * directives that will share slots, and thus, the fewer false positives when checking for\n * the existence of a directive.\n */\nconst BLOOM_SIZE = 256;\nconst BLOOM_MASK = BLOOM_SIZE - 1;\n/** Counter used to generate unique IDs for directives. */\nlet nextNgElementId = 0;\n/**\n * Registers this directive as present in its node's injector by flipping the directive's\n * corresponding bit in the injector's bloom filter.\n *\n * @param injectorIndex The index of the node injector where this token should be registered\n * @param tView The TView for the injector's bloom filters\n * @param type The directive token to register\n */\nfunction bloomAdd(injectorIndex, tView, type) {\n    ngDevMode && assertEqual(tView.firstCreatePass, true, 'expected firstCreatePass to be true');\n    let id;\n    if (typeof type === 'string') {\n        id = type.charCodeAt(0) || 0;\n    }\n    else if (type.hasOwnProperty(NG_ELEMENT_ID)) {\n        id = type[NG_ELEMENT_ID];\n    }\n    // Set a unique ID on the directive type, so if something tries to inject the directive,\n    // we can easily retrieve the ID and hash it into the bloom bit that should be checked.\n    if (id == null) {\n        id = type[NG_ELEMENT_ID] = nextNgElementId++;\n    }\n    // We only have BLOOM_SIZE (256) slots in our bloom filter (8 buckets * 32 bits each),\n    // so all unique IDs must be modulo-ed into a number from 0 - 255 to fit into the filter.\n    const bloomBit = id & BLOOM_MASK;\n    // Create a mask that targets the specific bit associated with the directive.\n    // JS bit operations are 32 bits, so this will be a number between 2^0 and 2^31, corresponding\n    // to bit positions 0 - 31 in a 32 bit integer.\n    const mask = 1 << bloomBit;\n    // Use the raw bloomBit number to determine which bloom filter bucket we should check\n    // e.g: bf0 = [0 - 31], bf1 = [32 - 63], bf2 = [64 - 95], bf3 = [96 - 127], etc\n    const b7 = bloomBit & 0x80;\n    const b6 = bloomBit & 0x40;\n    const b5 = bloomBit & 0x20;\n    const tData = tView.data;\n    if (b7) {\n        b6 ? (b5 ? (tData[injectorIndex + 7] |= mask) : (tData[injectorIndex + 6] |= mask)) :\n            (b5 ? (tData[injectorIndex + 5] |= mask) : (tData[injectorIndex + 4] |= mask));\n    }\n    else {\n        b6 ? (b5 ? (tData[injectorIndex + 3] |= mask) : (tData[injectorIndex + 2] |= mask)) :\n            (b5 ? (tData[injectorIndex + 1] |= mask) : (tData[injectorIndex] |= mask));\n    }\n}\n/**\n * Creates (or gets an existing) injector for a given element or container.\n *\n * @param tNode for which an injector should be retrieved / created.\n * @param hostView View where the node is stored\n * @returns Node injector\n */\nfunction getOrCreateNodeInjectorForNode(tNode, hostView) {\n    const existingInjectorIndex = getInjectorIndex(tNode, hostView);\n    if (existingInjectorIndex !== -1) {\n        return existingInjectorIndex;\n    }\n    const tView = hostView[TVIEW];\n    if (tView.firstCreatePass) {\n        tNode.injectorIndex = hostView.length;\n        insertBloom(tView.data, tNode); // foundation for node bloom\n        insertBloom(hostView, null); // foundation for cumulative bloom\n        insertBloom(tView.blueprint, null);\n    }\n    const parentLoc = getParentInjectorLocation(tNode, hostView);\n    const injectorIndex = tNode.injectorIndex;\n    // If a parent injector can't be found, its location is set to -1.\n    // In that case, we don't need to set up a cumulative bloom\n    if (hasParentInjector(parentLoc)) {\n        const parentIndex = getParentInjectorIndex(parentLoc);\n        const parentLView = getParentInjectorView(parentLoc, hostView);\n        const parentData = parentLView[TVIEW].data;\n        // Creates a cumulative bloom filter that merges the parent's bloom filter\n        // and its own cumulative bloom (which contains tokens for all ancestors)\n        for (let i = 0; i < 8; i++) {\n            hostView[injectorIndex + i] = parentLView[parentIndex + i] | parentData[parentIndex + i];\n        }\n    }\n    hostView[injectorIndex + PARENT_INJECTOR] = parentLoc;\n    return injectorIndex;\n}\nfunction insertBloom(arr, footer) {\n    arr.push(0, 0, 0, 0, 0, 0, 0, 0, footer);\n}\nfunction getInjectorIndex(tNode, hostView) {\n    if (tNode.injectorIndex === -1 ||\n        // If the injector index is the same as its parent's injector index, then the index has been\n        // copied down from the parent node. No injector has been created yet on this node.\n        (tNode.parent && tNode.parent.injectorIndex === tNode.injectorIndex) ||\n        // After the first template pass, the injector index might exist but the parent values\n        // might not have been calculated yet for this instance\n        hostView[tNode.injectorIndex + PARENT_INJECTOR] == null) {\n        return -1;\n    }\n    else {\n        return tNode.injectorIndex;\n    }\n}\n/**\n * Finds the index of the parent injector, with a view offset if applicable. Used to set the\n * parent injector initially.\n *\n * Returns a combination of number of `ViewData` we have to go up and index in that `Viewdata`\n */\nfunction getParentInjectorLocation(tNode, view) {\n    if (tNode.parent && tNode.parent.injectorIndex !== -1) {\n        return tNode.parent.injectorIndex; // ViewOffset is 0\n    }\n    // For most cases, the parent injector index can be found on the host node (e.g. for component\n    // or container), so this loop will be skipped, but we must keep the loop here to support\n    // the rarer case of deeply nested <ng-template> tags or inline views.\n    let hostTNode = view[T_HOST];\n    let viewOffset = 1;\n    while (hostTNode && hostTNode.injectorIndex === -1) {\n        view = view[DECLARATION_VIEW];\n        hostTNode = view ? view[T_HOST] : null;\n        viewOffset++;\n    }\n    return hostTNode ?\n        hostTNode.injectorIndex | (viewOffset << 16 /* ViewOffsetShift */) :\n        -1;\n}\n/**\n * Makes a type or an injection token public to the DI system by adding it to an\n * injector's bloom filter.\n *\n * @param di The node injector in which a directive will be added\n * @param token The type or the injection token to be made public\n */\nfunction diPublicInInjector(injectorIndex, tView, token) {\n    bloomAdd(injectorIndex, tView, token);\n}\n/**\n * Inject static attribute value into directive constructor.\n *\n * This method is used with `factory` functions which are generated as part of\n * `defineDirective` or `defineComponent`. The method retrieves the static value\n * of an attribute. (Dynamic attributes are not supported since they are not resolved\n *  at the time of injection and can change over time.)\n *\n * # Example\n * Given:\n * ```\n * @Component(...)\n * class MyComponent {\n *   constructor(@Attribute('title') title: string) { ... }\n * }\n * ```\n * When instantiated with\n * ```\n * <my-component title=\"Hello\"></my-component>\n * ```\n *\n * Then factory method generated is:\n * ```\n * MyComponent.ɵcmp = defineComponent({\n *   factory: () => new MyComponent(injectAttribute('title'))\n *   ...\n * })\n * ```\n *\n * @publicApi\n */\nfunction injectAttributeImpl(tNode, attrNameToInject) {\n    ngDevMode &&\n        assertNodeOfPossibleTypes(tNode, [0 /* Container */, 3 /* Element */, 4 /* ElementContainer */]);\n    ngDevMode && assertDefined(tNode, 'expecting tNode');\n    if (attrNameToInject === 'class') {\n        return tNode.classes;\n    }\n    if (attrNameToInject === 'style') {\n        return tNode.styles;\n    }\n    const attrs = tNode.attrs;\n    if (attrs) {\n        const attrsLength = attrs.length;\n        let i = 0;\n        while (i < attrsLength) {\n            const value = attrs[i];\n            // If we hit a `Bindings` or `Template` marker then we are done.\n            if (isNameOnlyAttributeMarker(value))\n                break;\n            // Skip namespaced attributes\n            if (value === 0 /* NamespaceURI */) {\n                // we skip the next two values\n                // as namespaced attributes looks like\n                // [..., AttributeMarker.NamespaceURI, 'http://someuri.com/test', 'test:exist',\n                // 'existValue', ...]\n                i = i + 2;\n            }\n            else if (typeof value === 'number') {\n                // Skip to the first value of the marked attribute.\n                i++;\n                while (i < attrsLength && typeof attrs[i] === 'string') {\n                    i++;\n                }\n            }\n            else if (value === attrNameToInject) {\n                return attrs[i + 1];\n            }\n            else {\n                i = i + 2;\n            }\n        }\n    }\n    return null;\n}\n/**\n * Returns the value associated to the given token from the NodeInjectors => ModuleInjector.\n *\n * Look for the injector providing the token by walking up the node injector tree and then\n * the module injector tree.\n *\n * This function patches `token` with `__NG_ELEMENT_ID__` which contains the id for the bloom\n * filter. Negative values are reserved for special objects.\n *   - `-1` is reserved for injecting `Injector` (implemented by `NodeInjector`)\n *\n * @param tNode The Node where the search for the injector should start\n * @param lView The `LView` that contains the `tNode`\n * @param token The token to look for\n * @param flags Injection flags\n * @param notFoundValue The value to return when the injection flags is `InjectFlags.Optional`\n * @returns the value from the injector, `null` when not found, or `notFoundValue` if provided\n */\nfunction getOrCreateInjectable(tNode, lView, token, flags = InjectFlags.Default, notFoundValue) {\n    if (tNode !== null) {\n        const bloomHash = bloomHashBitOrFactory(token);\n        // If the ID stored here is a function, this is a special object like ElementRef or TemplateRef\n        // so just call the factory function to create it.\n        if (typeof bloomHash === 'function') {\n            enterDI(lView, tNode);\n            try {\n                const value = bloomHash();\n                if (value == null && !(flags & InjectFlags.Optional)) {\n                    throw new Error(`No provider for ${stringifyForError(token)}!`);\n                }\n                else {\n                    return value;\n                }\n            }\n            finally {\n                leaveDI();\n            }\n        }\n        else if (typeof bloomHash == 'number') {\n            if (bloomHash === -1) {\n                // `-1` is a special value used to identify `Injector` types.\n                return new NodeInjector(tNode, lView);\n            }\n            // If the token has a bloom hash, then it is a token which could be in NodeInjector.\n            // A reference to the previous injector TView that was found while climbing the element\n            // injector tree. This is used to know if viewProviders can be accessed on the current\n            // injector.\n            let previousTView = null;\n            let injectorIndex = getInjectorIndex(tNode, lView);\n            let parentLocation = NO_PARENT_INJECTOR;\n            let hostTElementNode = flags & InjectFlags.Host ? lView[DECLARATION_COMPONENT_VIEW][T_HOST] : null;\n            // If we should skip this injector, or if there is no injector on this node, start by\n            // searching\n            // the parent injector.\n            if (injectorIndex === -1 || flags & InjectFlags.SkipSelf) {\n                parentLocation = injectorIndex === -1 ? getParentInjectorLocation(tNode, lView) :\n                    lView[injectorIndex + PARENT_INJECTOR];\n                if (!shouldSearchParent(flags, false)) {\n                    injectorIndex = -1;\n                }\n                else {\n                    previousTView = lView[TVIEW];\n                    injectorIndex = getParentInjectorIndex(parentLocation);\n                    lView = getParentInjectorView(parentLocation, lView);\n                }\n            }\n            // Traverse up the injector tree until we find a potential match or until we know there\n            // *isn't* a match.\n            while (injectorIndex !== -1) {\n                parentLocation = lView[injectorIndex + PARENT_INJECTOR];\n                // Check the current injector. If it matches, see if it contains token.\n                const tView = lView[TVIEW];\n                if (bloomHasToken(bloomHash, injectorIndex, tView.data)) {\n                    // At this point, we have an injector which *may* contain the token, so we step through\n                    // the providers and directives associated with the injector's corresponding node to get\n                    // the instance.\n                    const instance = searchTokensOnInjector(injectorIndex, lView, token, previousTView, flags, hostTElementNode);\n                    if (instance !== NOT_FOUND) {\n                        return instance;\n                    }\n                }\n                if (shouldSearchParent(flags, lView[TVIEW].data[injectorIndex + TNODE] === hostTElementNode) &&\n                    bloomHasToken(bloomHash, injectorIndex, lView)) {\n                    // The def wasn't found anywhere on this node, so it was a false positive.\n                    // Traverse up the tree and continue searching.\n                    previousTView = tView;\n                    injectorIndex = getParentInjectorIndex(parentLocation);\n                    lView = getParentInjectorView(parentLocation, lView);\n                }\n                else {\n                    // If we should not search parent OR If the ancestor bloom filter value does not have the\n                    // bit corresponding to the directive we can give up on traversing up to find the specific\n                    // injector.\n                    injectorIndex = -1;\n                }\n            }\n        }\n    }\n    if (flags & InjectFlags.Optional && notFoundValue === undefined) {\n        // This must be set or the NullInjector will throw for optional deps\n        notFoundValue = null;\n    }\n    if ((flags & (InjectFlags.Self | InjectFlags.Host)) === 0) {\n        const moduleInjector = lView[INJECTOR$1];\n        // switch to `injectInjectorOnly` implementation for module injector, since module injector\n        // should not have access to Component/Directive DI scope (that may happen through\n        // `directiveInject` implementation)\n        const previousInjectImplementation = setInjectImplementation(undefined);\n        try {\n            if (moduleInjector) {\n                return moduleInjector.get(token, notFoundValue, flags & InjectFlags.Optional);\n            }\n            else {\n                return injectRootLimpMode(token, notFoundValue, flags & InjectFlags.Optional);\n            }\n        }\n        finally {\n            setInjectImplementation(previousInjectImplementation);\n        }\n    }\n    if (flags & InjectFlags.Optional) {\n        return notFoundValue;\n    }\n    else {\n        throw new Error(`NodeInjector: NOT_FOUND [${stringifyForError(token)}]`);\n    }\n}\nconst NOT_FOUND = {};\nfunction searchTokensOnInjector(injectorIndex, lView, token, previousTView, flags, hostTElementNode) {\n    const currentTView = lView[TVIEW];\n    const tNode = currentTView.data[injectorIndex + TNODE];\n    // First, we need to determine if view providers can be accessed by the starting element.\n    // There are two possibities\n    const canAccessViewProviders = previousTView == null ?\n        // 1) This is the first invocation `previousTView == null` which means that we are at the\n        // `TNode` of where injector is starting to look. In such a case the only time we are allowed\n        // to look into the ViewProviders is if:\n        // - we are on a component\n        // - AND the injector set `includeViewProviders` to true (implying that the token can see\n        // ViewProviders because it is the Component or a Service which itself was declared in\n        // ViewProviders)\n        (isComponentHost(tNode) && includeViewProviders) :\n        // 2) `previousTView != null` which means that we are now walking across the parent nodes.\n        // In such a case we are only allowed to look into the ViewProviders if:\n        // - We just crossed from child View to Parent View `previousTView != currentTView`\n        // - AND the parent TNode is an Element.\n        // This means that we just came from the Component's View and therefore are allowed to see\n        // into the ViewProviders.\n        (previousTView != currentTView && (tNode.type === 3 /* Element */));\n    // This special case happens when there is a @host on the inject and when we are searching\n    // on the host element node.\n    const isHostSpecialCase = (flags & InjectFlags.Host) && hostTElementNode === tNode;\n    const injectableIdx = locateDirectiveOrProvider(tNode, currentTView, token, canAccessViewProviders, isHostSpecialCase);\n    if (injectableIdx !== null) {\n        return getNodeInjectable(lView, currentTView, injectableIdx, tNode);\n    }\n    else {\n        return NOT_FOUND;\n    }\n}\n/**\n * Searches for the given token among the node's directives and providers.\n *\n * @param tNode TNode on which directives are present.\n * @param tView The tView we are currently processing\n * @param token Provider token or type of a directive to look for.\n * @param canAccessViewProviders Whether view providers should be considered.\n * @param isHostSpecialCase Whether the host special case applies.\n * @returns Index of a found directive or provider, or null when none found.\n */\nfunction locateDirectiveOrProvider(tNode, tView, token, canAccessViewProviders, isHostSpecialCase) {\n    const nodeProviderIndexes = tNode.providerIndexes;\n    const tInjectables = tView.data;\n    const injectablesStart = nodeProviderIndexes & 1048575 /* ProvidersStartIndexMask */;\n    const directivesStart = tNode.directiveStart;\n    const directiveEnd = tNode.directiveEnd;\n    const cptViewProvidersCount = nodeProviderIndexes >> 20 /* CptViewProvidersCountShift */;\n    const startingIndex = canAccessViewProviders ? injectablesStart : injectablesStart + cptViewProvidersCount;\n    // When the host special case applies, only the viewProviders and the component are visible\n    const endIndex = isHostSpecialCase ? injectablesStart + cptViewProvidersCount : directiveEnd;\n    for (let i = startingIndex; i < endIndex; i++) {\n        const providerTokenOrDef = tInjectables[i];\n        if (i < directivesStart && token === providerTokenOrDef ||\n            i >= directivesStart && providerTokenOrDef.type === token) {\n            return i;\n        }\n    }\n    if (isHostSpecialCase) {\n        const dirDef = tInjectables[directivesStart];\n        if (dirDef && isComponentDef(dirDef) && dirDef.type === token) {\n            return directivesStart;\n        }\n    }\n    return null;\n}\n/**\n * Retrieve or instantiate the injectable from the `LView` at particular `index`.\n *\n * This function checks to see if the value has already been instantiated and if so returns the\n * cached `injectable`. Otherwise if it detects that the value is still a factory it\n * instantiates the `injectable` and caches the value.\n */\nfunction getNodeInjectable(lView, tView, index, tNode) {\n    let value = lView[index];\n    const tData = tView.data;\n    if (isFactory(value)) {\n        const factory = value;\n        if (factory.resolving) {\n            throw new Error(`Circular dep for ${stringifyForError(tData[index])}`);\n        }\n        const previousIncludeViewProviders = setIncludeViewProviders(factory.canSeeViewProviders);\n        factory.resolving = true;\n        let previousInjectImplementation;\n        if (factory.injectImpl) {\n            previousInjectImplementation = setInjectImplementation(factory.injectImpl);\n        }\n        enterDI(lView, tNode);\n        try {\n            value = lView[index] = factory.factory(undefined, tData, lView, tNode);\n            // This code path is hit for both directives and providers.\n            // For perf reasons, we want to avoid searching for hooks on providers.\n            // It does no harm to try (the hooks just won't exist), but the extra\n            // checks are unnecessary and this is a hot path. So we check to see\n            // if the index of the dependency is in the directive range for this\n            // tNode. If it's not, we know it's a provider and skip hook registration.\n            if (tView.firstCreatePass && index >= tNode.directiveStart) {\n                ngDevMode && assertDirectiveDef(tData[index]);\n                registerPreOrderHooks(index, tData[index], tView);\n            }\n        }\n        finally {\n            if (factory.injectImpl)\n                setInjectImplementation(previousInjectImplementation);\n            setIncludeViewProviders(previousIncludeViewProviders);\n            factory.resolving = false;\n            leaveDI();\n        }\n    }\n    return value;\n}\n/**\n * Returns the bit in an injector's bloom filter that should be used to determine whether or not\n * the directive might be provided by the injector.\n *\n * When a directive is public, it is added to the bloom filter and given a unique ID that can be\n * retrieved on the Type. When the directive isn't public or the token is not a directive `null`\n * is returned as the node injector can not possibly provide that token.\n *\n * @param token the injection token\n * @returns the matching bit to check in the bloom filter or `null` if the token is not known.\n *   When the returned value is negative then it represents special values such as `Injector`.\n */\nfunction bloomHashBitOrFactory(token) {\n    ngDevMode && assertDefined(token, 'token must be defined');\n    if (typeof token === 'string') {\n        return token.charCodeAt(0) || 0;\n    }\n    const tokenId = \n    // First check with `hasOwnProperty` so we don't get an inherited ID.\n    token.hasOwnProperty(NG_ELEMENT_ID) ? token[NG_ELEMENT_ID] : undefined;\n    // Negative token IDs are used for special objects such as `Injector`\n    return (typeof tokenId === 'number' && tokenId > 0) ? tokenId & BLOOM_MASK : tokenId;\n}\nfunction bloomHasToken(bloomHash, injectorIndex, injectorView) {\n    // Create a mask that targets the specific bit associated with the directive we're looking for.\n    // JS bit operations are 32 bits, so this will be a number between 2^0 and 2^31, corresponding\n    // to bit positions 0 - 31 in a 32 bit integer.\n    const mask = 1 << bloomHash;\n    const b7 = bloomHash & 0x80;\n    const b6 = bloomHash & 0x40;\n    const b5 = bloomHash & 0x20;\n    // Our bloom filter size is 256 bits, which is eight 32-bit bloom filter buckets:\n    // bf0 = [0 - 31], bf1 = [32 - 63], bf2 = [64 - 95], bf3 = [96 - 127], etc.\n    // Get the bloom filter value from the appropriate bucket based on the directive's bloomBit.\n    let value;\n    if (b7) {\n        value = b6 ? (b5 ? injectorView[injectorIndex + 7] : injectorView[injectorIndex + 6]) :\n            (b5 ? injectorView[injectorIndex + 5] : injectorView[injectorIndex + 4]);\n    }\n    else {\n        value = b6 ? (b5 ? injectorView[injectorIndex + 3] : injectorView[injectorIndex + 2]) :\n            (b5 ? injectorView[injectorIndex + 1] : injectorView[injectorIndex]);\n    }\n    // If the bloom filter value has the bit corresponding to the directive's bloomBit flipped on,\n    // this injector is a potential match.\n    return !!(value & mask);\n}\n/** Returns true if flags prevent parent injector from being searched for tokens */\nfunction shouldSearchParent(flags, isFirstHostTNode) {\n    return !(flags & InjectFlags.Self) && !(flags & InjectFlags.Host && isFirstHostTNode);\n}\nclass NodeInjector {\n    constructor(_tNode, _lView) {\n        this._tNode = _tNode;\n        this._lView = _lView;\n    }\n    get(token, notFoundValue) {\n        return getOrCreateInjectable(this._tNode, this._lView, token, undefined, notFoundValue);\n    }\n}\n/**\n * @codeGenApi\n */\nfunction ɵɵgetFactoryOf(type) {\n    const typeAny = type;\n    if (isForwardRef(type)) {\n        return (() => {\n            const factory = ɵɵgetFactoryOf(resolveForwardRef(typeAny));\n            return factory ? factory() : null;\n        });\n    }\n    let factory = getFactoryDef(typeAny);\n    if (factory === null) {\n        const injectorDef = getInjectorDef(typeAny);\n        factory = injectorDef && injectorDef.factory;\n    }\n    return factory || null;\n}\n/**\n * @codeGenApi\n */\nfunction ɵɵgetInheritedFactory(type) {\n    return noSideEffects(() => {\n        const ownConstructor = type.prototype.constructor;\n        const ownFactory = ownConstructor[NG_FACTORY_DEF] || ɵɵgetFactoryOf(ownConstructor);\n        const objectPrototype = Object.prototype;\n        let parent = Object.getPrototypeOf(type.prototype).constructor;\n        // Go up the prototype until we hit `Object`.\n        while (parent && parent !== objectPrototype) {\n            const factory = parent[NG_FACTORY_DEF] || ɵɵgetFactoryOf(parent);\n            // If we hit something that has a factory and the factory isn't the same as the type,\n            // we've found the inherited factory. Note the check that the factory isn't the type's\n            // own factory is redundant in most cases, but if the user has custom decorators on the\n            // class, this lookup will start one level down in the prototype chain, causing us to\n            // find the own factory first and potentially triggering an infinite loop downstream.\n            if (factory && factory !== ownFactory) {\n                return factory;\n            }\n            parent = Object.getPrototypeOf(parent);\n        }\n        // There is no factory defined. Either this was improper usage of inheritance\n        // (no Angular decorator on the superclass) or there is no constructor at all\n        // in the inheritance chain. Since the two cases cannot be distinguished, the\n        // latter has to be assumed.\n        return t => new t();\n    });\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst ERROR_TYPE = 'ngType';\nconst ERROR_DEBUG_CONTEXT = 'ngDebugContext';\nconst ERROR_ORIGINAL_ERROR = 'ngOriginalError';\nconst ERROR_LOGGER = 'ngErrorLogger';\nfunction wrappedError(message, originalError) {\n    const msg = `${message} caused by: ${originalError instanceof Error ? originalError.message : originalError}`;\n    const error = Error(msg);\n    error[ERROR_ORIGINAL_ERROR] = originalError;\n    return error;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction getType(error) {\n    return error[ERROR_TYPE];\n}\nfunction getDebugContext(error) {\n    return error[ERROR_DEBUG_CONTEXT];\n}\nfunction getOriginalError(error) {\n    return error[ERROR_ORIGINAL_ERROR];\n}\nfunction getErrorLogger(error) {\n    return error[ERROR_LOGGER] || defaultErrorLogger;\n}\nfunction defaultErrorLogger(console, ...values) {\n    console.error(...values);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Provides a hook for centralized exception handling.\n *\n * The default implementation of `ErrorHandler` prints error messages to the `console`. To\n * intercept error handling, write a custom exception handler that replaces this default as\n * appropriate for your app.\n *\n * @usageNotes\n * ### Example\n *\n * ```\n * class MyErrorHandler implements ErrorHandler {\n *   handleError(error) {\n *     // do something with the exception\n *   }\n * }\n *\n * @NgModule({\n *   providers: [{provide: ErrorHandler, useClass: MyErrorHandler}]\n * })\n * class MyModule {}\n * ```\n *\n * @publicApi\n */\nclass ErrorHandler {\n    constructor() {\n        /**\n         * @internal\n         */\n        this._console = console;\n    }\n    handleError(error) {\n        const originalError = this._findOriginalError(error);\n        const context = this._findContext(error);\n        // Note: Browser consoles show the place from where console.error was called.\n        // We can use this to give users additional information about the error.\n        const errorLogger = getErrorLogger(error);\n        errorLogger(this._console, `ERROR`, error);\n        if (originalError) {\n            errorLogger(this._console, `ORIGINAL ERROR`, originalError);\n        }\n        if (context) {\n            errorLogger(this._console, 'ERROR CONTEXT', context);\n        }\n    }\n    /** @internal */\n    _findContext(error) {\n        if (error) {\n            return getDebugContext(error) ? getDebugContext(error) :\n                this._findContext(getOriginalError(error));\n        }\n        return null;\n    }\n    /** @internal */\n    _findOriginalError(error) {\n        let e = getOriginalError(error);\n        while (e && getOriginalError(e)) {\n            e = getOriginalError(e);\n        }\n        return e;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Defines a schema that allows an NgModule to contain the following:\n * - Non-Angular elements named with dash case (`-`).\n * - Element properties named with dash case (`-`).\n * Dash case is the naming convention for custom elements.\n *\n * @publicApi\n */\nconst CUSTOM_ELEMENTS_SCHEMA = {\n    name: 'custom-elements'\n};\n/**\n * Defines a schema that allows any property on any element.\n *\n * @publicApi\n */\nconst NO_ERRORS_SCHEMA = {\n    name: 'no-errors-schema'\n};\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass SafeValueImpl {\n    constructor(changingThisBreaksApplicationSecurity) {\n        this.changingThisBreaksApplicationSecurity = changingThisBreaksApplicationSecurity;\n    }\n    toString() {\n        return `SafeValue must use [property]=binding: ${this.changingThisBreaksApplicationSecurity}` +\n            ` (see http://g.co/ng/security#xss)`;\n    }\n}\nclass SafeHtmlImpl extends SafeValueImpl {\n    getTypeName() {\n        return \"HTML\" /* Html */;\n    }\n}\nclass SafeStyleImpl extends SafeValueImpl {\n    getTypeName() {\n        return \"Style\" /* Style */;\n    }\n}\nclass SafeScriptImpl extends SafeValueImpl {\n    getTypeName() {\n        return \"Script\" /* Script */;\n    }\n}\nclass SafeUrlImpl extends SafeValueImpl {\n    getTypeName() {\n        return \"URL\" /* Url */;\n    }\n}\nclass SafeResourceUrlImpl extends SafeValueImpl {\n    getTypeName() {\n        return \"ResourceURL\" /* ResourceUrl */;\n    }\n}\nfunction unwrapSafeValue(value) {\n    return value instanceof SafeValueImpl ? value.changingThisBreaksApplicationSecurity :\n        value;\n}\nfunction allowSanitizationBypassAndThrow(value, type) {\n    const actualType = getSanitizationBypassType(value);\n    if (actualType != null && actualType !== type) {\n        // Allow ResourceURLs in URL contexts, they are strictly more trusted.\n        if (actualType === \"ResourceURL\" /* ResourceUrl */ && type === \"URL\" /* Url */)\n            return true;\n        throw new Error(`Required a safe ${type}, got a ${actualType} (see http://g.co/ng/security#xss)`);\n    }\n    return actualType === type;\n}\nfunction getSanitizationBypassType(value) {\n    return value instanceof SafeValueImpl && value.getTypeName() || null;\n}\n/**\n * Mark `html` string as trusted.\n *\n * This function wraps the trusted string in `String` and brands it in a way which makes it\n * recognizable to {@link htmlSanitizer} to be trusted implicitly.\n *\n * @param trustedHtml `html` string which needs to be implicitly trusted.\n * @returns a `html` which has been branded to be implicitly trusted.\n */\nfunction bypassSanitizationTrustHtml(trustedHtml) {\n    return new SafeHtmlImpl(trustedHtml);\n}\n/**\n * Mark `style` string as trusted.\n *\n * This function wraps the trusted string in `String` and brands it in a way which makes it\n * recognizable to {@link styleSanitizer} to be trusted implicitly.\n *\n * @param trustedStyle `style` string which needs to be implicitly trusted.\n * @returns a `style` hich has been branded to be implicitly trusted.\n */\nfunction bypassSanitizationTrustStyle(trustedStyle) {\n    return new SafeStyleImpl(trustedStyle);\n}\n/**\n * Mark `script` string as trusted.\n *\n * This function wraps the trusted string in `String` and brands it in a way which makes it\n * recognizable to {@link scriptSanitizer} to be trusted implicitly.\n *\n * @param trustedScript `script` string which needs to be implicitly trusted.\n * @returns a `script` which has been branded to be implicitly trusted.\n */\nfunction bypassSanitizationTrustScript(trustedScript) {\n    return new SafeScriptImpl(trustedScript);\n}\n/**\n * Mark `url` string as trusted.\n *\n * This function wraps the trusted string in `String` and brands it in a way which makes it\n * recognizable to {@link urlSanitizer} to be trusted implicitly.\n *\n * @param trustedUrl `url` string which needs to be implicitly trusted.\n * @returns a `url`  which has been branded to be implicitly trusted.\n */\nfunction bypassSanitizationTrustUrl(trustedUrl) {\n    return new SafeUrlImpl(trustedUrl);\n}\n/**\n * Mark `url` string as trusted.\n *\n * This function wraps the trusted string in `String` and brands it in a way which makes it\n * recognizable to {@link resourceUrlSanitizer} to be trusted implicitly.\n *\n * @param trustedResourceUrl `url` string which needs to be implicitly trusted.\n * @returns a `url` which has been branded to be implicitly trusted.\n */\nfunction bypassSanitizationTrustResourceUrl(trustedResourceUrl) {\n    return new SafeResourceUrlImpl(trustedResourceUrl);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * This file is used to control if the default rendering pipeline should be `ViewEngine` or `Ivy`.\n *\n * For more information on how to run and debug tests with either Ivy or View Engine (legacy),\n * please see [BAZEL.md](./docs/BAZEL.md).\n */\nlet _devMode = true;\nlet _runModeLocked = false;\n/**\n * Returns whether Angular is in development mode. After called once,\n * the value is locked and won't change any more.\n *\n * By default, this is true, unless a user calls `enableProdMode` before calling this.\n *\n * @publicApi\n */\nfunction isDevMode() {\n    _runModeLocked = true;\n    return _devMode;\n}\n/**\n * Disable Angular's development mode, which turns off assertions and other\n * checks within the framework.\n *\n * One important assertion this disables verifies that a change detection pass\n * does not result in additional changes to any bindings (also known as\n * unidirectional data flow).\n *\n * @publicApi\n */\nfunction enableProdMode() {\n    if (_runModeLocked) {\n        throw new Error('Cannot enable prod mode after platform setup.');\n    }\n    _devMode = false;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * This helper is used to get hold of an inert tree of DOM elements containing dirty HTML\n * that needs sanitizing.\n * Depending upon browser support we use one of two strategies for doing this.\n * Default: DOMParser strategy\n * Fallback: InertDocument strategy\n */\nfunction getInertBodyHelper(defaultDoc) {\n    return isDOMParserAvailable() ? new DOMParserHelper() : new InertDocumentHelper(defaultDoc);\n}\n/**\n * Uses DOMParser to create and fill an inert body element.\n * This is the default strategy used in browsers that support it.\n */\nclass DOMParserHelper {\n    getInertBodyElement(html) {\n        // We add these extra elements to ensure that the rest of the content is parsed as expected\n        // e.g. leading whitespace is maintained and tags like `<meta>` do not get hoisted to the\n        // `<head>` tag. Note that the `<body>` tag is closed implicitly to prevent unclosed tags\n        // in `html` from consuming the otherwise explicit `</body>` tag.\n        html = '<body><remove></remove>' + html;\n        try {\n            const body = new window.DOMParser().parseFromString(html, 'text/html').body;\n            body.removeChild(body.firstChild);\n            return body;\n        }\n        catch (_a) {\n            return null;\n        }\n    }\n}\n/**\n * Use an HTML5 `template` element, if supported, or an inert body element created via\n * `createHtmlDocument` to create and fill an inert DOM element.\n * This is the fallback strategy if the browser does not support DOMParser.\n */\nclass InertDocumentHelper {\n    constructor(defaultDoc) {\n        this.defaultDoc = defaultDoc;\n        this.inertDocument = this.defaultDoc.implementation.createHTMLDocument('sanitization-inert');\n        if (this.inertDocument.body == null) {\n            // usually there should be only one body element in the document, but IE doesn't have any, so\n            // we need to create one.\n            const inertHtml = this.inertDocument.createElement('html');\n            this.inertDocument.appendChild(inertHtml);\n            const inertBodyElement = this.inertDocument.createElement('body');\n            inertHtml.appendChild(inertBodyElement);\n        }\n    }\n    getInertBodyElement(html) {\n        // Prefer using <template> element if supported.\n        const templateEl = this.inertDocument.createElement('template');\n        if ('content' in templateEl) {\n            templateEl.innerHTML = html;\n            return templateEl;\n        }\n        // Note that previously we used to do something like `this.inertDocument.body.innerHTML = html`\n        // and we returned the inert `body` node. This was changed, because IE seems to treat setting\n        // `innerHTML` on an inserted element differently, compared to one that hasn't been inserted\n        // yet. In particular, IE appears to split some of the text into multiple text nodes rather\n        // than keeping them in a single one which ends up messing with Ivy's i18n parsing further\n        // down the line. This has been worked around by creating a new inert `body` and using it as\n        // the root node in which we insert the HTML.\n        const inertBody = this.inertDocument.createElement('body');\n        inertBody.innerHTML = html;\n        // Support: IE 9-11 only\n        // strip custom-namespaced attributes on IE<=11\n        if (this.defaultDoc.documentMode) {\n            this.stripCustomNsAttrs(inertBody);\n        }\n        return inertBody;\n    }\n    /**\n     * When IE9-11 comes across an unknown namespaced attribute e.g. 'xlink:foo' it adds 'xmlns:ns1'\n     * attribute to declare ns1 namespace and prefixes the attribute with 'ns1' (e.g.\n     * 'ns1:xlink:foo').\n     *\n     * This is undesirable since we don't want to allow any of these custom attributes. This method\n     * strips them all.\n     */\n    stripCustomNsAttrs(el) {\n        const elAttrs = el.attributes;\n        // loop backwards so that we can support removals.\n        for (let i = elAttrs.length - 1; 0 < i; i--) {\n            const attrib = elAttrs.item(i);\n            const attrName = attrib.name;\n            if (attrName === 'xmlns:ns1' || attrName.indexOf('ns1:') === 0) {\n                el.removeAttribute(attrName);\n            }\n        }\n        let childNode = el.firstChild;\n        while (childNode) {\n            if (childNode.nodeType === Node.ELEMENT_NODE)\n                this.stripCustomNsAttrs(childNode);\n            childNode = childNode.nextSibling;\n        }\n    }\n}\n/**\n * We need to determine whether the DOMParser exists in the global context and\n * supports parsing HTML; HTML parsing support is not as wide as other formats, see\n * https://developer.mozilla.org/en-US/docs/Web/API/DOMParser#Browser_compatibility.\n *\n * @suppress {uselessCode}\n */\nfunction isDOMParserAvailable() {\n    try {\n        return !!new window.DOMParser().parseFromString('', 'text/html');\n    }\n    catch (_a) {\n        return false;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * A pattern that recognizes a commonly useful subset of URLs that are safe.\n *\n * This regular expression matches a subset of URLs that will not cause script\n * execution if used in URL context within a HTML document. Specifically, this\n * regular expression matches if (comment from here on and regex copied from\n * Soy's EscapingConventions):\n * (1) Either an allowed protocol (http, https, mailto or ftp).\n * (2) or no protocol.  A protocol must be followed by a colon. The below\n *     allows that by allowing colons only after one of the characters [/?#].\n *     A colon after a hash (#) must be in the fragment.\n *     Otherwise, a colon after a (?) must be in a query.\n *     Otherwise, a colon after a single solidus (/) must be in a path.\n *     Otherwise, a colon after a double solidus (//) must be in the authority\n *     (before port).\n *\n * The pattern disallows &, used in HTML entity declarations before\n * one of the characters in [/?#]. This disallows HTML entities used in the\n * protocol name, which should never happen, e.g. \"h&#116;tp\" for \"http\".\n * It also disallows HTML entities in the first path part of a relative path,\n * e.g. \"foo&lt;bar/baz\".  Our existing escaping functions should not produce\n * that. More importantly, it disallows masking of a colon,\n * e.g. \"javascript&#58;...\".\n *\n * This regular expression was taken from the Closure sanitization library.\n */\nconst SAFE_URL_PATTERN = /^(?:(?:https?|mailto|ftp|tel|file|sms):|[^&:/?#]*(?:[/?#]|$))/gi;\n/* A pattern that matches safe srcset values */\nconst SAFE_SRCSET_PATTERN = /^(?:(?:https?|file):|[^&:/?#]*(?:[/?#]|$))/gi;\n/** A pattern that matches safe data URLs. Only matches image, video and audio types. */\nconst DATA_URL_PATTERN = /^data:(?:image\\/(?:bmp|gif|jpeg|jpg|png|tiff|webp)|video\\/(?:mpeg|mp4|ogg|webm)|audio\\/(?:mp3|oga|ogg|opus));base64,[a-z0-9+\\/]+=*$/i;\nfunction _sanitizeUrl(url) {\n    url = String(url);\n    if (url.match(SAFE_URL_PATTERN) || url.match(DATA_URL_PATTERN))\n        return url;\n    if (isDevMode()) {\n        console.warn(`WARNING: sanitizing unsafe URL value ${url} (see http://g.co/ng/security#xss)`);\n    }\n    return 'unsafe:' + url;\n}\nfunction sanitizeSrcset(srcset) {\n    srcset = String(srcset);\n    return srcset.split(',').map((srcset) => _sanitizeUrl(srcset.trim())).join(', ');\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction tagSet(tags) {\n    const res = {};\n    for (const t of tags.split(','))\n        res[t] = true;\n    return res;\n}\nfunction merge(...sets) {\n    const res = {};\n    for (const s of sets) {\n        for (const v in s) {\n            if (s.hasOwnProperty(v))\n                res[v] = true;\n        }\n    }\n    return res;\n}\n// Good source of info about elements and attributes\n// http://dev.w3.org/html5/spec/Overview.html#semantics\n// http://simon.html5.org/html-elements\n// Safe Void Elements - HTML5\n// http://dev.w3.org/html5/spec/Overview.html#void-elements\nconst VOID_ELEMENTS = tagSet('area,br,col,hr,img,wbr');\n// Elements that you can, intentionally, leave open (and which close themselves)\n// http://dev.w3.org/html5/spec/Overview.html#optional-tags\nconst OPTIONAL_END_TAG_BLOCK_ELEMENTS = tagSet('colgroup,dd,dt,li,p,tbody,td,tfoot,th,thead,tr');\nconst OPTIONAL_END_TAG_INLINE_ELEMENTS = tagSet('rp,rt');\nconst OPTIONAL_END_TAG_ELEMENTS = merge(OPTIONAL_END_TAG_INLINE_ELEMENTS, OPTIONAL_END_TAG_BLOCK_ELEMENTS);\n// Safe Block Elements - HTML5\nconst BLOCK_ELEMENTS = merge(OPTIONAL_END_TAG_BLOCK_ELEMENTS, tagSet('address,article,' +\n    'aside,blockquote,caption,center,del,details,dialog,dir,div,dl,figure,figcaption,footer,h1,h2,h3,h4,h5,' +\n    'h6,header,hgroup,hr,ins,main,map,menu,nav,ol,pre,section,summary,table,ul'));\n// Inline Elements - HTML5\nconst INLINE_ELEMENTS = merge(OPTIONAL_END_TAG_INLINE_ELEMENTS, tagSet('a,abbr,acronym,audio,b,' +\n    'bdi,bdo,big,br,cite,code,del,dfn,em,font,i,img,ins,kbd,label,map,mark,picture,q,ruby,rp,rt,s,' +\n    'samp,small,source,span,strike,strong,sub,sup,time,track,tt,u,var,video'));\nconst VALID_ELEMENTS = merge(VOID_ELEMENTS, BLOCK_ELEMENTS, INLINE_ELEMENTS, OPTIONAL_END_TAG_ELEMENTS);\n// Attributes that have href and hence need to be sanitized\nconst URI_ATTRS = tagSet('background,cite,href,itemtype,longdesc,poster,src,xlink:href');\n// Attributes that have special href set hence need to be sanitized\nconst SRCSET_ATTRS = tagSet('srcset');\nconst HTML_ATTRS = tagSet('abbr,accesskey,align,alt,autoplay,axis,bgcolor,border,cellpadding,cellspacing,class,clear,color,cols,colspan,' +\n    'compact,controls,coords,datetime,default,dir,download,face,headers,height,hidden,hreflang,hspace,' +\n    'ismap,itemscope,itemprop,kind,label,lang,language,loop,media,muted,nohref,nowrap,open,preload,rel,rev,role,rows,rowspan,rules,' +\n    'scope,scrolling,shape,size,sizes,span,srclang,start,summary,tabindex,target,title,translate,type,usemap,' +\n    'valign,value,vspace,width');\n// Accessibility attributes as per WAI-ARIA 1.1 (W3C Working Draft 14 December 2018)\nconst ARIA_ATTRS = tagSet('aria-activedescendant,aria-atomic,aria-autocomplete,aria-busy,aria-checked,aria-colcount,aria-colindex,' +\n    'aria-colspan,aria-controls,aria-current,aria-describedby,aria-details,aria-disabled,aria-dropeffect,' +\n    'aria-errormessage,aria-expanded,aria-flowto,aria-grabbed,aria-haspopup,aria-hidden,aria-invalid,' +\n    'aria-keyshortcuts,aria-label,aria-labelledby,aria-level,aria-live,aria-modal,aria-multiline,' +\n    'aria-multiselectable,aria-orientation,aria-owns,aria-placeholder,aria-posinset,aria-pressed,aria-readonly,' +\n    'aria-relevant,aria-required,aria-roledescription,aria-rowcount,aria-rowindex,aria-rowspan,aria-selected,' +\n    'aria-setsize,aria-sort,aria-valuemax,aria-valuemin,aria-valuenow,aria-valuetext');\n// NB: This currently consciously doesn't support SVG. SVG sanitization has had several security\n// issues in the past, so it seems safer to leave it out if possible. If support for binding SVG via\n// innerHTML is required, SVG attributes should be added here.\n// NB: Sanitization does not allow <form> elements or other active elements (<button> etc). Those\n// can be sanitized, but they increase security surface area without a legitimate use case, so they\n// are left out here.\nconst VALID_ATTRS = merge(URI_ATTRS, SRCSET_ATTRS, HTML_ATTRS, ARIA_ATTRS);\n// Elements whose content should not be traversed/preserved, if the elements themselves are invalid.\n//\n// Typically, `<invalid>Some content</invalid>` would traverse (and in this case preserve)\n// `Some content`, but strip `invalid-element` opening/closing tags. For some elements, though, we\n// don't want to preserve the content, if the elements themselves are going to be removed.\nconst SKIP_TRAVERSING_CONTENT_IF_INVALID_ELEMENTS = tagSet('script,style,template');\n/**\n * SanitizingHtmlSerializer serializes a DOM fragment, stripping out any unsafe elements and unsafe\n * attributes.\n */\nclass SanitizingHtmlSerializer {\n    constructor() {\n        // Explicitly track if something was stripped, to avoid accidentally warning of sanitization just\n        // because characters were re-encoded.\n        this.sanitizedSomething = false;\n        this.buf = [];\n    }\n    sanitizeChildren(el) {\n        // This cannot use a TreeWalker, as it has to run on Angular's various DOM adapters.\n        // However this code never accesses properties off of `document` before deleting its contents\n        // again, so it shouldn't be vulnerable to DOM clobbering.\n        let current = el.firstChild;\n        let traverseContent = true;\n        while (current) {\n            if (current.nodeType === Node.ELEMENT_NODE) {\n                traverseContent = this.startElement(current);\n            }\n            else if (current.nodeType === Node.TEXT_NODE) {\n                this.chars(current.nodeValue);\n            }\n            else {\n                // Strip non-element, non-text nodes.\n                this.sanitizedSomething = true;\n            }\n            if (traverseContent && current.firstChild) {\n                current = current.firstChild;\n                continue;\n            }\n            while (current) {\n                // Leaving the element. Walk up and to the right, closing tags as we go.\n                if (current.nodeType === Node.ELEMENT_NODE) {\n                    this.endElement(current);\n                }\n                let next = this.checkClobberedElement(current, current.nextSibling);\n                if (next) {\n                    current = next;\n                    break;\n                }\n                current = this.checkClobberedElement(current, current.parentNode);\n            }\n        }\n        return this.buf.join('');\n    }\n    /**\n     * Sanitizes an opening element tag (if valid) and returns whether the element's contents should\n     * be traversed. Element content must always be traversed (even if the element itself is not\n     * valid/safe), unless the element is one of `SKIP_TRAVERSING_CONTENT_IF_INVALID_ELEMENTS`.\n     *\n     * @param element The element to sanitize.\n     * @return True if the element's contents should be traversed.\n     */\n    startElement(element) {\n        const tagName = element.nodeName.toLowerCase();\n        if (!VALID_ELEMENTS.hasOwnProperty(tagName)) {\n            this.sanitizedSomething = true;\n            return !SKIP_TRAVERSING_CONTENT_IF_INVALID_ELEMENTS.hasOwnProperty(tagName);\n        }\n        this.buf.push('<');\n        this.buf.push(tagName);\n        const elAttrs = element.attributes;\n        for (let i = 0; i < elAttrs.length; i++) {\n            const elAttr = elAttrs.item(i);\n            const attrName = elAttr.name;\n            const lower = attrName.toLowerCase();\n            if (!VALID_ATTRS.hasOwnProperty(lower)) {\n                this.sanitizedSomething = true;\n                continue;\n            }\n            let value = elAttr.value;\n            // TODO(martinprobst): Special case image URIs for data:image/...\n            if (URI_ATTRS[lower])\n                value = _sanitizeUrl(value);\n            if (SRCSET_ATTRS[lower])\n                value = sanitizeSrcset(value);\n            this.buf.push(' ', attrName, '=\"', encodeEntities(value), '\"');\n        }\n        this.buf.push('>');\n        return true;\n    }\n    endElement(current) {\n        const tagName = current.nodeName.toLowerCase();\n        if (VALID_ELEMENTS.hasOwnProperty(tagName) && !VOID_ELEMENTS.hasOwnProperty(tagName)) {\n            this.buf.push('</');\n            this.buf.push(tagName);\n            this.buf.push('>');\n        }\n    }\n    chars(chars) {\n        this.buf.push(encodeEntities(chars));\n    }\n    checkClobberedElement(node, nextNode) {\n        if (nextNode &&\n            (node.compareDocumentPosition(nextNode) &\n                Node.DOCUMENT_POSITION_CONTAINED_BY) === Node.DOCUMENT_POSITION_CONTAINED_BY) {\n            throw new Error(`Failed to sanitize html because the element is clobbered: ${node.outerHTML}`);\n        }\n        return nextNode;\n    }\n}\n// Regular Expressions for parsing tags and attributes\nconst SURROGATE_PAIR_REGEXP = /[\\uD800-\\uDBFF][\\uDC00-\\uDFFF]/g;\n// ! to ~ is the ASCII range.\nconst NON_ALPHANUMERIC_REGEXP = /([^\\#-~ |!])/g;\n/**\n * Escapes all potentially dangerous characters, so that the\n * resulting string can be safely inserted into attribute or\n * element text.\n * @param value\n */\nfunction encodeEntities(value) {\n    return value.replace(/&/g, '&amp;')\n        .replace(SURROGATE_PAIR_REGEXP, function (match) {\n        const hi = match.charCodeAt(0);\n        const low = match.charCodeAt(1);\n        return '&#' + (((hi - 0xD800) * 0x400) + (low - 0xDC00) + 0x10000) + ';';\n    })\n        .replace(NON_ALPHANUMERIC_REGEXP, function (match) {\n        return '&#' + match.charCodeAt(0) + ';';\n    })\n        .replace(/</g, '&lt;')\n        .replace(/>/g, '&gt;');\n}\nlet inertBodyHelper;\n/**\n * Sanitizes the given unsafe, untrusted HTML fragment, and returns HTML text that is safe to add to\n * the DOM in a browser environment.\n */\nfunction _sanitizeHtml(defaultDoc, unsafeHtmlInput) {\n    let inertBodyElement = null;\n    try {\n        inertBodyHelper = inertBodyHelper || getInertBodyHelper(defaultDoc);\n        // Make sure unsafeHtml is actually a string (TypeScript types are not enforced at runtime).\n        let unsafeHtml = unsafeHtmlInput ? String(unsafeHtmlInput) : '';\n        inertBodyElement = inertBodyHelper.getInertBodyElement(unsafeHtml);\n        // mXSS protection. Repeatedly parse the document to make sure it stabilizes, so that a browser\n        // trying to auto-correct incorrect HTML cannot cause formerly inert HTML to become dangerous.\n        let mXSSAttempts = 5;\n        let parsedHtml = unsafeHtml;\n        do {\n            if (mXSSAttempts === 0) {\n                throw new Error('Failed to sanitize html because the input is unstable');\n            }\n            mXSSAttempts--;\n            unsafeHtml = parsedHtml;\n            parsedHtml = inertBodyElement.innerHTML;\n            inertBodyElement = inertBodyHelper.getInertBodyElement(unsafeHtml);\n        } while (unsafeHtml !== parsedHtml);\n        const sanitizer = new SanitizingHtmlSerializer();\n        const safeHtml = sanitizer.sanitizeChildren(getTemplateContent(inertBodyElement) || inertBodyElement);\n        if (isDevMode() && sanitizer.sanitizedSomething) {\n            console.warn('WARNING: sanitizing HTML stripped some content, see http://g.co/ng/security#xss');\n        }\n        return safeHtml;\n    }\n    finally {\n        // In case anything goes wrong, clear out inertElement to reset the entire DOM structure.\n        if (inertBodyElement) {\n            const parent = getTemplateContent(inertBodyElement) || inertBodyElement;\n            while (parent.firstChild) {\n                parent.removeChild(parent.firstChild);\n            }\n        }\n    }\n}\nfunction getTemplateContent(el) {\n    return 'content' in el /** Microsoft/TypeScript#21517 */ && isTemplateElement(el) ?\n        el.content :\n        null;\n}\nfunction isTemplateElement(el) {\n    return el.nodeType === Node.ELEMENT_NODE && el.nodeName === 'TEMPLATE';\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * A SecurityContext marks a location that has dangerous security implications, e.g. a DOM property\n * like `innerHTML` that could cause Cross Site Scripting (XSS) security bugs when improperly\n * handled.\n *\n * See DomSanitizer for more details on security in Angular applications.\n *\n * @publicApi\n */\nvar SecurityContext;\n(function (SecurityContext) {\n    SecurityContext[SecurityContext[\"NONE\"] = 0] = \"NONE\";\n    SecurityContext[SecurityContext[\"HTML\"] = 1] = \"HTML\";\n    SecurityContext[SecurityContext[\"STYLE\"] = 2] = \"STYLE\";\n    SecurityContext[SecurityContext[\"SCRIPT\"] = 3] = \"SCRIPT\";\n    SecurityContext[SecurityContext[\"URL\"] = 4] = \"URL\";\n    SecurityContext[SecurityContext[\"RESOURCE_URL\"] = 5] = \"RESOURCE_URL\";\n})(SecurityContext || (SecurityContext = {}));\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * An `html` sanitizer which converts untrusted `html` **string** into trusted string by removing\n * dangerous content.\n *\n * This method parses the `html` and locates potentially dangerous content (such as urls and\n * javascript) and removes it.\n *\n * It is possible to mark a string as trusted by calling {@link bypassSanitizationTrustHtml}.\n *\n * @param unsafeHtml untrusted `html`, typically from the user.\n * @returns `html` string which is safe to display to user, because all of the dangerous javascript\n * and urls have been removed.\n *\n * @codeGenApi\n */\nfunction ɵɵsanitizeHtml(unsafeHtml) {\n    const sanitizer = getSanitizer();\n    if (sanitizer) {\n        return sanitizer.sanitize(SecurityContext.HTML, unsafeHtml) || '';\n    }\n    if (allowSanitizationBypassAndThrow(unsafeHtml, \"HTML\" /* Html */)) {\n        return unwrapSafeValue(unsafeHtml);\n    }\n    return _sanitizeHtml(getDocument(), renderStringify(unsafeHtml));\n}\n/**\n * A `style` sanitizer which converts untrusted `style` **string** into trusted string by removing\n * dangerous content.\n *\n * It is possible to mark a string as trusted by calling {@link bypassSanitizationTrustStyle}.\n *\n * @param unsafeStyle untrusted `style`, typically from the user.\n * @returns `style` string which is safe to bind to the `style` properties.\n *\n * @codeGenApi\n */\nfunction ɵɵsanitizeStyle(unsafeStyle) {\n    const sanitizer = getSanitizer();\n    if (sanitizer) {\n        return sanitizer.sanitize(SecurityContext.STYLE, unsafeStyle) || '';\n    }\n    if (allowSanitizationBypassAndThrow(unsafeStyle, \"Style\" /* Style */)) {\n        return unwrapSafeValue(unsafeStyle);\n    }\n    return renderStringify(unsafeStyle);\n}\n/**\n * A `url` sanitizer which converts untrusted `url` **string** into trusted string by removing\n * dangerous\n * content.\n *\n * This method parses the `url` and locates potentially dangerous content (such as javascript) and\n * removes it.\n *\n * It is possible to mark a string as trusted by calling {@link bypassSanitizationTrustUrl}.\n *\n * @param unsafeUrl untrusted `url`, typically from the user.\n * @returns `url` string which is safe to bind to the `src` properties such as `<img src>`, because\n * all of the dangerous javascript has been removed.\n *\n * @codeGenApi\n */\nfunction ɵɵsanitizeUrl(unsafeUrl) {\n    const sanitizer = getSanitizer();\n    if (sanitizer) {\n        return sanitizer.sanitize(SecurityContext.URL, unsafeUrl) || '';\n    }\n    if (allowSanitizationBypassAndThrow(unsafeUrl, \"URL\" /* Url */)) {\n        return unwrapSafeValue(unsafeUrl);\n    }\n    return _sanitizeUrl(renderStringify(unsafeUrl));\n}\n/**\n * A `url` sanitizer which only lets trusted `url`s through.\n *\n * This passes only `url`s marked trusted by calling {@link bypassSanitizationTrustResourceUrl}.\n *\n * @param unsafeResourceUrl untrusted `url`, typically from the user.\n * @returns `url` string which is safe to bind to the `src` properties such as `<img src>`, because\n * only trusted `url`s have been allowed to pass.\n *\n * @codeGenApi\n */\nfunction ɵɵsanitizeResourceUrl(unsafeResourceUrl) {\n    const sanitizer = getSanitizer();\n    if (sanitizer) {\n        return sanitizer.sanitize(SecurityContext.RESOURCE_URL, unsafeResourceUrl) || '';\n    }\n    if (allowSanitizationBypassAndThrow(unsafeResourceUrl, \"ResourceURL\" /* ResourceUrl */)) {\n        return unwrapSafeValue(unsafeResourceUrl);\n    }\n    throw new Error('unsafe value used in a resource URL context (see http://g.co/ng/security#xss)');\n}\n/**\n * A `script` sanitizer which only lets trusted javascript through.\n *\n * This passes only `script`s marked trusted by calling {@link\n * bypassSanitizationTrustScript}.\n *\n * @param unsafeScript untrusted `script`, typically from the user.\n * @returns `url` string which is safe to bind to the `<script>` element such as `<img src>`,\n * because only trusted `scripts` have been allowed to pass.\n *\n * @codeGenApi\n */\nfunction ɵɵsanitizeScript(unsafeScript) {\n    const sanitizer = getSanitizer();\n    if (sanitizer) {\n        return sanitizer.sanitize(SecurityContext.SCRIPT, unsafeScript) || '';\n    }\n    if (allowSanitizationBypassAndThrow(unsafeScript, \"Script\" /* Script */)) {\n        return unwrapSafeValue(unsafeScript);\n    }\n    throw new Error('unsafe value used in a script context');\n}\n/**\n * Detects which sanitizer to use for URL property, based on tag name and prop name.\n *\n * The rules are based on the RESOURCE_URL context config from\n * `packages/compiler/src/schema/dom_security_schema.ts`.\n * If tag and prop names don't match Resource URL schema, use URL sanitizer.\n */\nfunction getUrlSanitizer(tag, prop) {\n    if ((prop === 'src' &&\n        (tag === 'embed' || tag === 'frame' || tag === 'iframe' || tag === 'media' ||\n            tag === 'script')) ||\n        (prop === 'href' && (tag === 'base' || tag === 'link'))) {\n        return ɵɵsanitizeResourceUrl;\n    }\n    return ɵɵsanitizeUrl;\n}\n/**\n * Sanitizes URL, selecting sanitizer function based on tag and property names.\n *\n * This function is used in case we can't define security context at compile time, when only prop\n * name is available. This happens when we generate host bindings for Directives/Components. The\n * host element is unknown at compile time, so we defer calculation of specific sanitizer to\n * runtime.\n *\n * @param unsafeUrl untrusted `url`, typically from the user.\n * @param tag target element tag name.\n * @param prop name of the property that contains the value.\n * @returns `url` string which is safe to bind.\n *\n * @codeGenApi\n */\nfunction ɵɵsanitizeUrlOrResourceUrl(unsafeUrl, tag, prop) {\n    return getUrlSanitizer(tag, prop)(unsafeUrl);\n}\nfunction validateAgainstEventProperties(name) {\n    if (name.toLowerCase().startsWith('on')) {\n        const msg = `Binding to event property '${name}' is disallowed for security reasons, ` +\n            `please use (${name.slice(2)})=...` +\n            `\\nIf '${name}' is a directive input, make sure the directive is imported by the` +\n            ` current module.`;\n        throw new Error(msg);\n    }\n}\nfunction validateAgainstEventAttributes(name) {\n    if (name.toLowerCase().startsWith('on')) {\n        const msg = `Binding to event attribute '${name}' is disallowed for security reasons, ` +\n            `please use (${name.slice(2)})=...`;\n        throw new Error(msg);\n    }\n}\nfunction getSanitizer() {\n    const lView = getLView();\n    return lView && lView[SANITIZER];\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * THIS FILE CONTAINS CODE WHICH SHOULD BE TREE SHAKEN AND NEVER CALLED FROM PRODUCTION CODE!!!\n */\n/**\n * Creates an `Array` construction with a given name. This is useful when\n * looking for memory consumption to see what time of array it is.\n *\n *\n * @param name Name to give to the constructor\n * @returns A subclass of `Array` if possible. This can only be done in\n *          environments which support `class` construct.\n */\nfunction createNamedArrayType(name) {\n    // This should never be called in prod mode, so let's verify that is the case.\n    if (ngDevMode) {\n        try {\n            // We need to do it this way so that TypeScript does not down-level the below code.\n            const FunctionConstructor = createNamedArrayType.constructor;\n            return (new FunctionConstructor('Array', `return class ${name} extends Array{}`))(Array);\n        }\n        catch (e) {\n            // If it does not work just give up and fall back to regular Array.\n            return Array;\n        }\n    }\n    else {\n        throw new Error('Looks like we are in \\'prod mode\\', but we are creating a named Array type, which is wrong! Check your code');\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction normalizeDebugBindingName(name) {\n    // Attribute names with `$` (eg `x-y$`) are valid per spec, but unsupported by some browsers\n    name = camelCaseToDashCase(name.replace(/[$@]/g, '_'));\n    return `ng-reflect-${name}`;\n}\nconst CAMEL_CASE_REGEXP = /([A-Z])/g;\nfunction camelCaseToDashCase(input) {\n    return input.replace(CAMEL_CASE_REGEXP, (...m) => '-' + m[1].toLowerCase());\n}\nfunction normalizeDebugBindingValue(value) {\n    try {\n        // Limit the size of the value as otherwise the DOM just gets polluted.\n        return value != null ? value.toString().slice(0, 30) : value;\n    }\n    catch (e) {\n        return '[ERROR] Exception while trying to serialize the value';\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Returns the matching `LContext` data for a given DOM node, directive or component instance.\n *\n * This function will examine the provided DOM element, component, or directive instance\\'s\n * monkey-patched property to derive the `LContext` data. Once called then the monkey-patched\n * value will be that of the newly created `LContext`.\n *\n * If the monkey-patched value is the `LView` instance then the context value for that\n * target will be created and the monkey-patch reference will be updated. Therefore when this\n * function is called it may mutate the provided element\\'s, component\\'s or any of the associated\n * directive\\'s monkey-patch values.\n *\n * If the monkey-patch value is not detected then the code will walk up the DOM until an element\n * is found which contains a monkey-patch reference. When that occurs then the provided element\n * will be updated with a new context (which is then returned). If the monkey-patch value is not\n * detected for a component/directive instance then it will throw an error (all components and\n * directives should be automatically monkey-patched by ivy).\n *\n * @param target Component, Directive or DOM Node.\n */\nfunction getLContext(target) {\n    let mpValue = readPatchedData(target);\n    if (mpValue) {\n        // only when it's an array is it considered an LView instance\n        // ... otherwise it's an already constructed LContext instance\n        if (Array.isArray(mpValue)) {\n            const lView = mpValue;\n            let nodeIndex;\n            let component = undefined;\n            let directives = undefined;\n            if (isComponentInstance(target)) {\n                nodeIndex = findViaComponent(lView, target);\n                if (nodeIndex == -1) {\n                    throw new Error('The provided component was not found in the application');\n                }\n                component = target;\n            }\n            else if (isDirectiveInstance(target)) {\n                nodeIndex = findViaDirective(lView, target);\n                if (nodeIndex == -1) {\n                    throw new Error('The provided directive was not found in the application');\n                }\n                directives = getDirectivesAtNodeIndex(nodeIndex, lView, false);\n            }\n            else {\n                nodeIndex = findViaNativeElement(lView, target);\n                if (nodeIndex == -1) {\n                    return null;\n                }\n            }\n            // the goal is not to fill the entire context full of data because the lookups\n            // are expensive. Instead, only the target data (the element, component, container, ICU\n            // expression or directive details) are filled into the context. If called multiple times\n            // with different target values then the missing target data will be filled in.\n            const native = unwrapRNode(lView[nodeIndex]);\n            const existingCtx = readPatchedData(native);\n            const context = (existingCtx && !Array.isArray(existingCtx)) ?\n                existingCtx :\n                createLContext(lView, nodeIndex, native);\n            // only when the component has been discovered then update the monkey-patch\n            if (component && context.component === undefined) {\n                context.component = component;\n                attachPatchData(context.component, context);\n            }\n            // only when the directives have been discovered then update the monkey-patch\n            if (directives && context.directives === undefined) {\n                context.directives = directives;\n                for (let i = 0; i < directives.length; i++) {\n                    attachPatchData(directives[i], context);\n                }\n            }\n            attachPatchData(context.native, context);\n            mpValue = context;\n        }\n    }\n    else {\n        const rElement = target;\n        ngDevMode && assertDomNode(rElement);\n        // if the context is not found then we need to traverse upwards up the DOM\n        // to find the nearest element that has already been monkey patched with data\n        let parent = rElement;\n        while (parent = parent.parentNode) {\n            const parentContext = readPatchedData(parent);\n            if (parentContext) {\n                let lView;\n                if (Array.isArray(parentContext)) {\n                    lView = parentContext;\n                }\n                else {\n                    lView = parentContext.lView;\n                }\n                // the edge of the app was also reached here through another means\n                // (maybe because the DOM was changed manually).\n                if (!lView) {\n                    return null;\n                }\n                const index = findViaNativeElement(lView, rElement);\n                if (index >= 0) {\n                    const native = unwrapRNode(lView[index]);\n                    const context = createLContext(lView, index, native);\n                    attachPatchData(native, context);\n                    mpValue = context;\n                    break;\n                }\n            }\n        }\n    }\n    return mpValue || null;\n}\n/**\n * Creates an empty instance of a `LContext` context\n */\nfunction createLContext(lView, nodeIndex, native) {\n    return {\n        lView,\n        nodeIndex,\n        native,\n        component: undefined,\n        directives: undefined,\n        localRefs: undefined,\n    };\n}\n/**\n * Takes a component instance and returns the view for that component.\n *\n * @param componentInstance\n * @returns The component's view\n */\nfunction getComponentViewByInstance(componentInstance) {\n    let lView = readPatchedData(componentInstance);\n    let view;\n    if (Array.isArray(lView)) {\n        const nodeIndex = findViaComponent(lView, componentInstance);\n        view = getComponentLViewByIndex(nodeIndex, lView);\n        const context = createLContext(lView, nodeIndex, view[HOST]);\n        context.component = componentInstance;\n        attachPatchData(componentInstance, context);\n        attachPatchData(context.native, context);\n    }\n    else {\n        const context = lView;\n        view = getComponentLViewByIndex(context.nodeIndex, context.lView);\n    }\n    return view;\n}\n/**\n * Assigns the given data to the given target (which could be a component,\n * directive or DOM node instance) using monkey-patching.\n */\nfunction attachPatchData(target, data) {\n    target[MONKEY_PATCH_KEY_NAME] = data;\n}\nfunction isComponentInstance(instance) {\n    return instance && instance.constructor && instance.constructor.ɵcmp;\n}\nfunction isDirectiveInstance(instance) {\n    return instance && instance.constructor && instance.constructor.ɵdir;\n}\n/**\n * Locates the element within the given LView and returns the matching index\n */\nfunction findViaNativeElement(lView, target) {\n    let tNode = lView[TVIEW].firstChild;\n    while (tNode) {\n        const native = getNativeByTNodeOrNull(tNode, lView);\n        if (native === target) {\n            return tNode.index;\n        }\n        tNode = traverseNextElement(tNode);\n    }\n    return -1;\n}\n/**\n * Locates the next tNode (child, sibling or parent).\n */\nfunction traverseNextElement(tNode) {\n    if (tNode.child) {\n        return tNode.child;\n    }\n    else if (tNode.next) {\n        return tNode.next;\n    }\n    else {\n        // Let's take the following template: <div><span>text</span></div><component/>\n        // After checking the text node, we need to find the next parent that has a \"next\" TNode,\n        // in this case the parent `div`, so that we can find the component.\n        while (tNode.parent && !tNode.parent.next) {\n            tNode = tNode.parent;\n        }\n        return tNode.parent && tNode.parent.next;\n    }\n}\n/**\n * Locates the component within the given LView and returns the matching index\n */\nfunction findViaComponent(lView, componentInstance) {\n    const componentIndices = lView[TVIEW].components;\n    if (componentIndices) {\n        for (let i = 0; i < componentIndices.length; i++) {\n            const elementComponentIndex = componentIndices[i];\n            const componentView = getComponentLViewByIndex(elementComponentIndex, lView);\n            if (componentView[CONTEXT] === componentInstance) {\n                return elementComponentIndex;\n            }\n        }\n    }\n    else {\n        const rootComponentView = getComponentLViewByIndex(HEADER_OFFSET, lView);\n        const rootComponent = rootComponentView[CONTEXT];\n        if (rootComponent === componentInstance) {\n            // we are dealing with the root element here therefore we know that the\n            // element is the very first element after the HEADER data in the lView\n            return HEADER_OFFSET;\n        }\n    }\n    return -1;\n}\n/**\n * Locates the directive within the given LView and returns the matching index\n */\nfunction findViaDirective(lView, directiveInstance) {\n    // if a directive is monkey patched then it will (by default)\n    // have a reference to the LView of the current view. The\n    // element bound to the directive being search lives somewhere\n    // in the view data. We loop through the nodes and check their\n    // list of directives for the instance.\n    let tNode = lView[TVIEW].firstChild;\n    while (tNode) {\n        const directiveIndexStart = tNode.directiveStart;\n        const directiveIndexEnd = tNode.directiveEnd;\n        for (let i = directiveIndexStart; i < directiveIndexEnd; i++) {\n            if (lView[i] === directiveInstance) {\n                return tNode.index;\n            }\n        }\n        tNode = traverseNextElement(tNode);\n    }\n    return -1;\n}\n/**\n * Returns a list of directives extracted from the given view based on the\n * provided list of directive index values.\n *\n * @param nodeIndex The node index\n * @param lView The target view data\n * @param includeComponents Whether or not to include components in returned directives\n */\nfunction getDirectivesAtNodeIndex(nodeIndex, lView, includeComponents) {\n    const tNode = lView[TVIEW].data[nodeIndex];\n    let directiveStartIndex = tNode.directiveStart;\n    if (directiveStartIndex == 0)\n        return EMPTY_ARRAY;\n    const directiveEndIndex = tNode.directiveEnd;\n    if (!includeComponents && tNode.flags & 2 /* isComponentHost */)\n        directiveStartIndex++;\n    return lView.slice(directiveStartIndex, directiveEndIndex);\n}\nfunction getComponentAtNodeIndex(nodeIndex, lView) {\n    const tNode = lView[TVIEW].data[nodeIndex];\n    let directiveStartIndex = tNode.directiveStart;\n    return tNode.flags & 2 /* isComponentHost */ ? lView[directiveStartIndex] : null;\n}\n/**\n * Returns a map of local references (local reference name => element or directive instance) that\n * exist on a given element.\n */\nfunction discoverLocalRefs(lView, nodeIndex) {\n    const tNode = lView[TVIEW].data[nodeIndex];\n    if (tNode && tNode.localNames) {\n        const result = {};\n        let localIndex = tNode.index + 1;\n        for (let i = 0; i < tNode.localNames.length; i += 2) {\n            result[tNode.localNames[i]] = lView[localIndex];\n            localIndex++;\n        }\n        return result;\n    }\n    return null;\n}\n\n/** Called when directives inject each other (creating a circular dependency) */\nfunction throwCyclicDependencyError(token) {\n    throw new Error(`Cannot instantiate cyclic dependency! ${token}`);\n}\n/** Called when there are multiple component selectors that match a given node */\nfunction throwMultipleComponentError(tNode) {\n    throw new Error(`Multiple components match node with tagname ${tNode.tagName}`);\n}\nfunction throwMixedMultiProviderError() {\n    throw new Error(`Cannot mix multi providers and regular providers`);\n}\nfunction throwInvalidProviderError(ngModuleType, providers, provider) {\n    let ngModuleDetail = '';\n    if (ngModuleType && providers) {\n        const providerDetail = providers.map(v => v == provider ? '?' + provider + '?' : '...');\n        ngModuleDetail =\n            ` - only instances of Provider and Type are allowed, got: [${providerDetail.join(', ')}]`;\n    }\n    throw new Error(`Invalid provider for the NgModule '${stringify(ngModuleType)}'` + ngModuleDetail);\n}\n/** Throws an ExpressionChangedAfterChecked error if checkNoChanges mode is on. */\nfunction throwErrorIfNoChangesMode(creationMode, oldValue, currValue, propName) {\n    const field = propName ? ` for '${propName}'` : '';\n    let msg = `ExpressionChangedAfterItHasBeenCheckedError: Expression has changed after it was checked. Previous value${field}: '${oldValue}'. Current value: '${currValue}'.`;\n    if (creationMode) {\n        msg +=\n            ` It seems like the view has been created after its parent and its children have been dirty checked.` +\n                ` Has it been created in a change detection hook?`;\n    }\n    // TODO: include debug context, see `viewDebugError` function in\n    // `packages/core/src/view/errors.ts` for reference.\n    throw new Error(msg);\n}\nfunction constructDetailsForInterpolation(lView, rootIndex, expressionIndex, meta, changedValue) {\n    const [propName, prefix, ...chunks] = meta.split(INTERPOLATION_DELIMITER);\n    let oldValue = prefix, newValue = prefix;\n    for (let i = 0; i < chunks.length; i++) {\n        const slotIdx = rootIndex + i;\n        oldValue += `${lView[slotIdx]}${chunks[i]}`;\n        newValue += `${slotIdx === expressionIndex ? changedValue : lView[slotIdx]}${chunks[i]}`;\n    }\n    return { propName, oldValue, newValue };\n}\n/**\n * Constructs an object that contains details for the ExpressionChangedAfterItHasBeenCheckedError:\n * - property name (for property bindings or interpolations)\n * - old and new values, enriched using information from metadata\n *\n * More information on the metadata storage format can be found in `storePropertyBindingMetadata`\n * function description.\n */\nfunction getExpressionChangedErrorDetails(lView, bindingIndex, oldValue, newValue) {\n    const tData = lView[TVIEW].data;\n    const metadata = tData[bindingIndex];\n    if (typeof metadata === 'string') {\n        // metadata for property interpolation\n        if (metadata.indexOf(INTERPOLATION_DELIMITER) > -1) {\n            return constructDetailsForInterpolation(lView, bindingIndex, bindingIndex, metadata, newValue);\n        }\n        // metadata for property binding\n        return { propName: metadata, oldValue, newValue };\n    }\n    // metadata is not available for this expression, check if this expression is a part of the\n    // property interpolation by going from the current binding index left and look for a string that\n    // contains INTERPOLATION_DELIMITER, the layout in tView.data for this case will look like this:\n    // [..., 'id�Prefix � and � suffix', null, null, null, ...]\n    if (metadata === null) {\n        let idx = bindingIndex - 1;\n        while (typeof tData[idx] !== 'string' && tData[idx + 1] === null) {\n            idx--;\n        }\n        const meta = tData[idx];\n        if (typeof meta === 'string') {\n            const matches = meta.match(new RegExp(INTERPOLATION_DELIMITER, 'g'));\n            // first interpolation delimiter separates property name from interpolation parts (in case of\n            // property interpolations), so we subtract one from total number of found delimiters\n            if (matches && (matches.length - 1) > bindingIndex - idx) {\n                return constructDetailsForInterpolation(lView, idx, bindingIndex, meta, newValue);\n            }\n        }\n    }\n    return { propName: undefined, oldValue, newValue };\n}\n\n/**\n * Converts `TNodeType` into human readable text.\n * Make sure this matches with `TNodeType`\n */\nconst TNodeTypeAsString = [\n    'Container',\n    'Projection',\n    'View',\n    'Element',\n    'ElementContainer',\n    'IcuContainer' // 5\n];\n// Note: This hack is necessary so we don't erroneously get a circular dependency\n// failure based on types.\nconst unusedValueExportToPlacateAjd$4 = 1;\n/**\n * Returns `true` if the `TNode` has a directive which has `@Input()` for `class` binding.\n *\n * ```\n * <div my-dir [class]=\"exp\"></div>\n * ```\n * and\n * ```\n * @Directive({\n * })\n * class MyDirective {\n *   @Input()\n *   class: string;\n * }\n * ```\n *\n * In the above case it is necessary to write the reconciled styling information into the\n * directive's input.\n *\n * @param tNode\n */\nfunction hasClassInput(tNode) {\n    return (tNode.flags & 16 /* hasClassInput */) !== 0;\n}\n/**\n * Returns `true` if the `TNode` has a directive which has `@Input()` for `style` binding.\n *\n * ```\n * <div my-dir [style]=\"exp\"></div>\n * ```\n * and\n * ```\n * @Directive({\n * })\n * class MyDirective {\n *   @Input()\n *   class: string;\n * }\n * ```\n *\n * In the above case it is necessary to write the reconciled styling information into the\n * directive's input.\n *\n * @param tNode\n */\nfunction hasStyleInput(tNode) {\n    return (tNode.flags & 32 /* hasStyleInput */) !== 0;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// Note: This hack is necessary so we don't erroneously get a circular dependency\n// failure based on types.\nconst unusedValueExportToPlacateAjd$5 = 1;\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Returns an index of `classToSearch` in `className` taking token boundaries into account.\n *\n * `classIndexOf('AB A', 'A', 0)` will be 3 (not 0 since `AB!==A`)\n *\n * @param className A string containing classes (whitespace separated)\n * @param classToSearch A class name to locate\n * @param startingIndex Starting location of search\n * @returns an index of the located class (or -1 if not found)\n */\nfunction classIndexOf(className, classToSearch, startingIndex) {\n    ngDevMode && assertNotEqual(classToSearch, '', 'can not look for \"\" string.');\n    let end = className.length;\n    while (true) {\n        const foundIndex = className.indexOf(classToSearch, startingIndex);\n        if (foundIndex === -1)\n            return foundIndex;\n        if (foundIndex === 0 || className.charCodeAt(foundIndex - 1) <= 32 /* SPACE */) {\n            // Ensure that it has leading whitespace\n            const length = classToSearch.length;\n            if (foundIndex + length === end ||\n                className.charCodeAt(foundIndex + length) <= 32 /* SPACE */) {\n                // Ensure that it has trailing whitespace\n                return foundIndex;\n            }\n        }\n        // False positive, keep searching from where we left off.\n        startingIndex = foundIndex + 1;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst unusedValueToPlacateAjd = unusedValueExportToPlacateAjd$4 + unusedValueExportToPlacateAjd$5;\nconst NG_TEMPLATE_SELECTOR = 'ng-template';\n/**\n * Search the `TAttributes` to see if it contains `cssClassToMatch` (case insensitive)\n *\n * @param attrs `TAttributes` to search through.\n * @param cssClassToMatch class to match (lowercase)\n * @param isProjectionMode Whether or not class matching should look into the attribute `class` in\n *    addition to the `AttributeMarker.Classes`.\n */\nfunction isCssClassMatching(attrs, cssClassToMatch, isProjectionMode) {\n    // TODO(misko): The fact that this function needs to know about `isProjectionMode` seems suspect.\n    // It is strange to me that sometimes the class information comes in form of `class` attribute\n    // and sometimes in form of `AttributeMarker.Classes`. Some investigation is needed to determine\n    // if that is the right behavior.\n    ngDevMode &&\n        assertEqual(cssClassToMatch, cssClassToMatch.toLowerCase(), 'Class name expected to be lowercase.');\n    let i = 0;\n    while (i < attrs.length) {\n        let item = attrs[i++];\n        if (isProjectionMode && item === 'class') {\n            item = attrs[i];\n            if (classIndexOf(item.toLowerCase(), cssClassToMatch, 0) !== -1) {\n                return true;\n            }\n        }\n        else if (item === 1 /* Classes */) {\n            // We found the classes section. Start searching for the class.\n            while (i < attrs.length && typeof (item = attrs[i++]) == 'string') {\n                // while we have strings\n                if (item.toLowerCase() === cssClassToMatch)\n                    return true;\n            }\n            return false;\n        }\n    }\n    return false;\n}\n/**\n * Checks whether the `tNode` represents an inline template (e.g. `*ngFor`).\n *\n * @param tNode current TNode\n */\nfunction isInlineTemplate(tNode) {\n    return tNode.type === 0 /* Container */ && tNode.tagName !== NG_TEMPLATE_SELECTOR;\n}\n/**\n * Function that checks whether a given tNode matches tag-based selector and has a valid type.\n *\n * Matching can be performed in 2 modes: projection mode (when we project nodes) and regular\n * directive matching mode:\n * - in the \"directive matching\" mode we do _not_ take TContainer's tagName into account if it is\n * different from NG_TEMPLATE_SELECTOR (value different from NG_TEMPLATE_SELECTOR indicates that a\n * tag name was extracted from * syntax so we would match the same directive twice);\n * - in the \"projection\" mode, we use a tag name potentially extracted from the * syntax processing\n * (applicable to TNodeType.Container only).\n */\nfunction hasTagAndTypeMatch(tNode, currentSelector, isProjectionMode) {\n    const tagNameToCompare = tNode.type === 0 /* Container */ && !isProjectionMode ?\n        NG_TEMPLATE_SELECTOR :\n        tNode.tagName;\n    return currentSelector === tagNameToCompare;\n}\n/**\n * A utility function to match an Ivy node static data against a simple CSS selector\n *\n * @param node static data of the node to match\n * @param selector The selector to try matching against the node.\n * @param isProjectionMode if `true` we are matching for content projection, otherwise we are doing\n * directive matching.\n * @returns true if node matches the selector.\n */\nfunction isNodeMatchingSelector(tNode, selector, isProjectionMode) {\n    ngDevMode && assertDefined(selector[0], 'Selector should have a tag name');\n    let mode = 4 /* ELEMENT */;\n    const nodeAttrs = tNode.attrs || [];\n    // Find the index of first attribute that has no value, only a name.\n    const nameOnlyMarkerIdx = getNameOnlyMarkerIndex(nodeAttrs);\n    // When processing \":not\" selectors, we skip to the next \":not\" if the\n    // current one doesn't match\n    let skipToNextSelector = false;\n    for (let i = 0; i < selector.length; i++) {\n        const current = selector[i];\n        if (typeof current === 'number') {\n            // If we finish processing a :not selector and it hasn't failed, return false\n            if (!skipToNextSelector && !isPositive(mode) && !isPositive(current)) {\n                return false;\n            }\n            // If we are skipping to the next :not() and this mode flag is positive,\n            // it's a part of the current :not() selector, and we should keep skipping\n            if (skipToNextSelector && isPositive(current))\n                continue;\n            skipToNextSelector = false;\n            mode = current | (mode & 1 /* NOT */);\n            continue;\n        }\n        if (skipToNextSelector)\n            continue;\n        if (mode & 4 /* ELEMENT */) {\n            mode = 2 /* ATTRIBUTE */ | mode & 1 /* NOT */;\n            if (current !== '' && !hasTagAndTypeMatch(tNode, current, isProjectionMode) ||\n                current === '' && selector.length === 1) {\n                if (isPositive(mode))\n                    return false;\n                skipToNextSelector = true;\n            }\n        }\n        else {\n            const selectorAttrValue = mode & 8 /* CLASS */ ? current : selector[++i];\n            // special case for matching against classes when a tNode has been instantiated with\n            // class and style values as separate attribute values (e.g. ['title', CLASS, 'foo'])\n            if ((mode & 8 /* CLASS */) && tNode.attrs !== null) {\n                if (!isCssClassMatching(tNode.attrs, selectorAttrValue, isProjectionMode)) {\n                    if (isPositive(mode))\n                        return false;\n                    skipToNextSelector = true;\n                }\n                continue;\n            }\n            const attrName = (mode & 8 /* CLASS */) ? 'class' : current;\n            const attrIndexInNode = findAttrIndexInNode(attrName, nodeAttrs, isInlineTemplate(tNode), isProjectionMode);\n            if (attrIndexInNode === -1) {\n                if (isPositive(mode))\n                    return false;\n                skipToNextSelector = true;\n                continue;\n            }\n            if (selectorAttrValue !== '') {\n                let nodeAttrValue;\n                if (attrIndexInNode > nameOnlyMarkerIdx) {\n                    nodeAttrValue = '';\n                }\n                else {\n                    ngDevMode &&\n                        assertNotEqual(nodeAttrs[attrIndexInNode], 0 /* NamespaceURI */, 'We do not match directives on namespaced attributes');\n                    // we lowercase the attribute value to be able to match\n                    // selectors without case-sensitivity\n                    // (selectors are already in lowercase when generated)\n                    nodeAttrValue = nodeAttrs[attrIndexInNode + 1].toLowerCase();\n                }\n                const compareAgainstClassName = mode & 8 /* CLASS */ ? nodeAttrValue : null;\n                if (compareAgainstClassName &&\n                    classIndexOf(compareAgainstClassName, selectorAttrValue, 0) !== -1 ||\n                    mode & 2 /* ATTRIBUTE */ && selectorAttrValue !== nodeAttrValue) {\n                    if (isPositive(mode))\n                        return false;\n                    skipToNextSelector = true;\n                }\n            }\n        }\n    }\n    return isPositive(mode) || skipToNextSelector;\n}\nfunction isPositive(mode) {\n    return (mode & 1 /* NOT */) === 0;\n}\n/**\n * Examines the attribute's definition array for a node to find the index of the\n * attribute that matches the given `name`.\n *\n * NOTE: This will not match namespaced attributes.\n *\n * Attribute matching depends upon `isInlineTemplate` and `isProjectionMode`.\n * The following table summarizes which types of attributes we attempt to match:\n *\n * ===========================================================================================================\n * Modes                   | Normal Attributes | Bindings Attributes | Template Attributes | I18n\n * Attributes\n * ===========================================================================================================\n * Inline + Projection     | YES               | YES                 | NO                  | YES\n * -----------------------------------------------------------------------------------------------------------\n * Inline + Directive      | NO                | NO                  | YES                 | NO\n * -----------------------------------------------------------------------------------------------------------\n * Non-inline + Projection | YES               | YES                 | NO                  | YES\n * -----------------------------------------------------------------------------------------------------------\n * Non-inline + Directive  | YES               | YES                 | NO                  | YES\n * ===========================================================================================================\n *\n * @param name the name of the attribute to find\n * @param attrs the attribute array to examine\n * @param isInlineTemplate true if the node being matched is an inline template (e.g. `*ngFor`)\n * rather than a manually expanded template node (e.g `<ng-template>`).\n * @param isProjectionMode true if we are matching against content projection otherwise we are\n * matching against directives.\n */\nfunction findAttrIndexInNode(name, attrs, isInlineTemplate, isProjectionMode) {\n    if (attrs === null)\n        return -1;\n    let i = 0;\n    if (isProjectionMode || !isInlineTemplate) {\n        let bindingsMode = false;\n        while (i < attrs.length) {\n            const maybeAttrName = attrs[i];\n            if (maybeAttrName === name) {\n                return i;\n            }\n            else if (maybeAttrName === 3 /* Bindings */ || maybeAttrName === 6 /* I18n */) {\n                bindingsMode = true;\n            }\n            else if (maybeAttrName === 1 /* Classes */ || maybeAttrName === 2 /* Styles */) {\n                let value = attrs[++i];\n                // We should skip classes here because we have a separate mechanism for\n                // matching classes in projection mode.\n                while (typeof value === 'string') {\n                    value = attrs[++i];\n                }\n                continue;\n            }\n            else if (maybeAttrName === 4 /* Template */) {\n                // We do not care about Template attributes in this scenario.\n                break;\n            }\n            else if (maybeAttrName === 0 /* NamespaceURI */) {\n                // Skip the whole namespaced attribute and value. This is by design.\n                i += 4;\n                continue;\n            }\n            // In binding mode there are only names, rather than name-value pairs.\n            i += bindingsMode ? 1 : 2;\n        }\n        // We did not match the attribute\n        return -1;\n    }\n    else {\n        return matchTemplateAttribute(attrs, name);\n    }\n}\nfunction isNodeMatchingSelectorList(tNode, selector, isProjectionMode = false) {\n    for (let i = 0; i < selector.length; i++) {\n        if (isNodeMatchingSelector(tNode, selector[i], isProjectionMode)) {\n            return true;\n        }\n    }\n    return false;\n}\nfunction getProjectAsAttrValue(tNode) {\n    const nodeAttrs = tNode.attrs;\n    if (nodeAttrs != null) {\n        const ngProjectAsAttrIdx = nodeAttrs.indexOf(5 /* ProjectAs */);\n        // only check for ngProjectAs in attribute names, don't accidentally match attribute's value\n        // (attribute names are stored at even indexes)\n        if ((ngProjectAsAttrIdx & 1) === 0) {\n            return nodeAttrs[ngProjectAsAttrIdx + 1];\n        }\n    }\n    return null;\n}\nfunction getNameOnlyMarkerIndex(nodeAttrs) {\n    for (let i = 0; i < nodeAttrs.length; i++) {\n        const nodeAttr = nodeAttrs[i];\n        if (isNameOnlyAttributeMarker(nodeAttr)) {\n            return i;\n        }\n    }\n    return nodeAttrs.length;\n}\nfunction matchTemplateAttribute(attrs, name) {\n    let i = attrs.indexOf(4 /* Template */);\n    if (i > -1) {\n        i++;\n        while (i < attrs.length) {\n            const attr = attrs[i];\n            // Return in case we checked all template attrs and are switching to the next section in the\n            // attrs array (that starts with a number that represents an attribute marker).\n            if (typeof attr === 'number')\n                return -1;\n            if (attr === name)\n                return i;\n            i++;\n        }\n    }\n    return -1;\n}\n/**\n * Checks whether a selector is inside a CssSelectorList\n * @param selector Selector to be checked.\n * @param list List in which to look for the selector.\n */\nfunction isSelectorInSelectorList(selector, list) {\n    selectorListLoop: for (let i = 0; i < list.length; i++) {\n        const currentSelectorInList = list[i];\n        if (selector.length !== currentSelectorInList.length) {\n            continue;\n        }\n        for (let j = 0; j < selector.length; j++) {\n            if (selector[j] !== currentSelectorInList[j]) {\n                continue selectorListLoop;\n            }\n        }\n        return true;\n    }\n    return false;\n}\nfunction maybeWrapInNotSelector(isNegativeMode, chunk) {\n    return isNegativeMode ? ':not(' + chunk.trim() + ')' : chunk;\n}\nfunction stringifyCSSSelector(selector) {\n    let result = selector[0];\n    let i = 1;\n    let mode = 2 /* ATTRIBUTE */;\n    let currentChunk = '';\n    let isNegativeMode = false;\n    while (i < selector.length) {\n        let valueOrMarker = selector[i];\n        if (typeof valueOrMarker === 'string') {\n            if (mode & 2 /* ATTRIBUTE */) {\n                const attrValue = selector[++i];\n                currentChunk +=\n                    '[' + valueOrMarker + (attrValue.length > 0 ? '=\"' + attrValue + '\"' : '') + ']';\n            }\n            else if (mode & 8 /* CLASS */) {\n                currentChunk += '.' + valueOrMarker;\n            }\n            else if (mode & 4 /* ELEMENT */) {\n                currentChunk += ' ' + valueOrMarker;\n            }\n        }\n        else {\n            //\n            // Append current chunk to the final result in case we come across SelectorFlag, which\n            // indicates that the previous section of a selector is over. We need to accumulate content\n            // between flags to make sure we wrap the chunk later in :not() selector if needed, e.g.\n            // ```\n            //  ['', Flags.CLASS, '.classA', Flags.CLASS | Flags.NOT, '.classB', '.classC']\n            // ```\n            // should be transformed to `.classA :not(.classB .classC)`.\n            //\n            // Note: for negative selector part, we accumulate content between flags until we find the\n            // next negative flag. This is needed to support a case where `:not()` rule contains more than\n            // one chunk, e.g. the following selector:\n            // ```\n            //  ['', Flags.ELEMENT | Flags.NOT, 'p', Flags.CLASS, 'foo', Flags.CLASS | Flags.NOT, 'bar']\n            // ```\n            // should be stringified to `:not(p.foo) :not(.bar)`\n            //\n            if (currentChunk !== '' && !isPositive(valueOrMarker)) {\n                result += maybeWrapInNotSelector(isNegativeMode, currentChunk);\n                currentChunk = '';\n            }\n            mode = valueOrMarker;\n            // According to CssSelector spec, once we come across `SelectorFlags.NOT` flag, the negative\n            // mode is maintained for remaining chunks of a selector.\n            isNegativeMode = isNegativeMode || !isPositive(mode);\n        }\n        i++;\n    }\n    if (currentChunk !== '') {\n        result += maybeWrapInNotSelector(isNegativeMode, currentChunk);\n    }\n    return result;\n}\n/**\n * Generates string representation of CSS selector in parsed form.\n *\n * ComponentDef and DirectiveDef are generated with the selector in parsed form to avoid doing\n * additional parsing at runtime (for example, for directive matching). However in some cases (for\n * example, while bootstrapping a component), a string version of the selector is required to query\n * for the host element on the page. This function takes the parsed form of a selector and returns\n * its string representation.\n *\n * @param selectorList selector in parsed form\n * @returns string representation of a given selector\n */\nfunction stringifyCSSSelectorList(selectorList) {\n    return selectorList.map(stringifyCSSSelector).join(',');\n}\n/**\n * Extracts attributes and classes information from a given CSS selector.\n *\n * This function is used while creating a component dynamically. In this case, the host element\n * (that is created dynamically) should contain attributes and classes specified in component's CSS\n * selector.\n *\n * @param selector CSS selector in parsed form (in a form of array)\n * @returns object with `attrs` and `classes` fields that contain extracted information\n */\nfunction extractAttrsAndClassesFromSelector(selector) {\n    const attrs = [];\n    const classes = [];\n    let i = 1;\n    let mode = 2 /* ATTRIBUTE */;\n    while (i < selector.length) {\n        let valueOrMarker = selector[i];\n        if (typeof valueOrMarker === 'string') {\n            if (mode === 2 /* ATTRIBUTE */) {\n                if (valueOrMarker !== '') {\n                    attrs.push(valueOrMarker, selector[++i]);\n                }\n            }\n            else if (mode === 8 /* CLASS */) {\n                classes.push(valueOrMarker);\n            }\n        }\n        else {\n            // According to CssSelector spec, once we come across `SelectorFlags.NOT` flag, the negative\n            // mode is maintained for remaining chunks of a selector. Since attributes and classes are\n            // extracted only for \"positive\" part of the selector, we can stop here.\n            if (!isPositive(mode))\n                break;\n            mode = valueOrMarker;\n        }\n        i++;\n    }\n    return { attrs, classes };\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** A special value which designates that a value has not changed. */\nconst NO_CHANGE = (typeof ngDevMode === 'undefined' || ngDevMode) ? { __brand__: 'NO_CHANGE' } : {};\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Gets the parent LView of the passed LView, if the PARENT is an LContainer, will get the parent of\n * that LContainer, which is an LView\n * @param lView the lView whose parent to get\n */\nfunction getLViewParent(lView) {\n    ngDevMode && assertLView(lView);\n    const parent = lView[PARENT];\n    return isLContainer(parent) ? parent[PARENT] : parent;\n}\n/**\n * Retrieve the root view from any component or `LView` by walking the parent `LView` until\n * reaching the root `LView`.\n *\n * @param componentOrLView any component or `LView`\n */\nfunction getRootView(componentOrLView) {\n    ngDevMode && assertDefined(componentOrLView, 'component');\n    let lView = isLView(componentOrLView) ? componentOrLView : readPatchedLView(componentOrLView);\n    while (lView && !(lView[FLAGS] & 512 /* IsRoot */)) {\n        lView = getLViewParent(lView);\n    }\n    ngDevMode && assertLView(lView);\n    return lView;\n}\n/**\n * Returns the `RootContext` instance that is associated with\n * the application where the target is situated. It does this by walking the parent views until it\n * gets to the root view, then getting the context off of that.\n *\n * @param viewOrComponent the `LView` or component to get the root context for.\n */\nfunction getRootContext(viewOrComponent) {\n    const rootView = getRootView(viewOrComponent);\n    ngDevMode &&\n        assertDefined(rootView[CONTEXT], 'RootView has no context. Perhaps it is disconnected?');\n    return rootView[CONTEXT];\n}\n/**\n * Gets the first `LContainer` in the LView or `null` if none exists.\n */\nfunction getFirstLContainer(lView) {\n    return getNearestLContainer(lView[CHILD_HEAD]);\n}\n/**\n * Gets the next `LContainer` that is a sibling of the given container.\n */\nfunction getNextLContainer(container) {\n    return getNearestLContainer(container[NEXT]);\n}\nfunction getNearestLContainer(viewOrContainer) {\n    while (viewOrContainer !== null && !isLContainer(viewOrContainer)) {\n        viewOrContainer = viewOrContainer[NEXT];\n    }\n    return viewOrContainer;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Advances to an element for later binding instructions.\n *\n * Used in conjunction with instructions like {@link property} to act on elements with specified\n * indices, for example those created with {@link element} or {@link elementStart}.\n *\n * ```ts\n * (rf: RenderFlags, ctx: any) => {\n *   if (rf & 1) {\n *     text(0, 'Hello');\n *     text(1, 'Goodbye')\n *     element(2, 'div');\n *   }\n *   if (rf & 2) {\n *     advance(2); // Advance twice to the <div>.\n *     property('title', 'test');\n *   }\n *  }\n * ```\n * @param delta Number of elements to advance forwards by.\n *\n * @codeGenApi\n */\nfunction ɵɵadvance(delta) {\n    ngDevMode && assertGreaterThan(delta, 0, 'Can only advance forward');\n    selectIndexInternal(getTView(), getLView(), getSelectedIndex() + delta, getCheckNoChangesMode());\n}\nfunction selectIndexInternal(tView, lView, index, checkNoChangesMode) {\n    ngDevMode && assertGreaterThan(index, -1, 'Invalid index');\n    ngDevMode && assertIndexInRange(lView, index + HEADER_OFFSET);\n    // Flush the initial hooks for elements in the view that have been added up to this point.\n    // PERF WARNING: do NOT extract this to a separate function without running benchmarks\n    if (!checkNoChangesMode) {\n        const hooksInitPhaseCompleted = (lView[FLAGS] & 3 /* InitPhaseStateMask */) === 3 /* InitPhaseCompleted */;\n        if (hooksInitPhaseCompleted) {\n            const preOrderCheckHooks = tView.preOrderCheckHooks;\n            if (preOrderCheckHooks !== null) {\n                executeCheckHooks(lView, preOrderCheckHooks, index);\n            }\n        }\n        else {\n            const preOrderHooks = tView.preOrderHooks;\n            if (preOrderHooks !== null) {\n                executeInitAndCheckHooks(lView, preOrderHooks, 0 /* OnInitHooksToBeRun */, index);\n            }\n        }\n    }\n    // We must set the selected index *after* running the hooks, because hooks may have side-effects\n    // that cause other template functions to run, thus updating the selected index, which is global\n    // state. If we run `setSelectedIndex` *before* we run the hooks, in some cases the selected index\n    // will be altered by the time we leave the `ɵɵadvance` instruction.\n    setSelectedIndex(index);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction toTStylingRange(prev, next) {\n    ngDevMode && assertNumberInRange(prev, 0, 32767 /* UNSIGNED_MASK */);\n    ngDevMode && assertNumberInRange(next, 0, 32767 /* UNSIGNED_MASK */);\n    return (prev << 17 /* PREV_SHIFT */ | next << 2 /* NEXT_SHIFT */);\n}\nfunction getTStylingRangePrev(tStylingRange) {\n    ngDevMode && assertNumber(tStylingRange, 'expected number');\n    return (tStylingRange >> 17 /* PREV_SHIFT */) & 32767 /* UNSIGNED_MASK */;\n}\nfunction getTStylingRangePrevDuplicate(tStylingRange) {\n    ngDevMode && assertNumber(tStylingRange, 'expected number');\n    return (tStylingRange & 2 /* PREV_DUPLICATE */) ==\n        2 /* PREV_DUPLICATE */;\n}\nfunction setTStylingRangePrev(tStylingRange, previous) {\n    ngDevMode && assertNumber(tStylingRange, 'expected number');\n    ngDevMode && assertNumberInRange(previous, 0, 32767 /* UNSIGNED_MASK */);\n    return ((tStylingRange & ~4294836224 /* PREV_MASK */) |\n        (previous << 17 /* PREV_SHIFT */));\n}\nfunction setTStylingRangePrevDuplicate(tStylingRange) {\n    ngDevMode && assertNumber(tStylingRange, 'expected number');\n    return (tStylingRange | 2 /* PREV_DUPLICATE */);\n}\nfunction getTStylingRangeNext(tStylingRange) {\n    ngDevMode && assertNumber(tStylingRange, 'expected number');\n    return (tStylingRange & 131068 /* NEXT_MASK */) >> 2 /* NEXT_SHIFT */;\n}\nfunction setTStylingRangeNext(tStylingRange, next) {\n    ngDevMode && assertNumber(tStylingRange, 'expected number');\n    ngDevMode && assertNumberInRange(next, 0, 32767 /* UNSIGNED_MASK */);\n    return ((tStylingRange & ~131068 /* NEXT_MASK */) | //\n        next << 2 /* NEXT_SHIFT */);\n}\nfunction getTStylingRangeNextDuplicate(tStylingRange) {\n    ngDevMode && assertNumber(tStylingRange, 'expected number');\n    return (tStylingRange & 1 /* NEXT_DUPLICATE */) ===\n        1 /* NEXT_DUPLICATE */;\n}\nfunction setTStylingRangeNextDuplicate(tStylingRange) {\n    ngDevMode && assertNumber(tStylingRange, 'expected number');\n    return (tStylingRange | 1 /* NEXT_DUPLICATE */);\n}\nfunction getTStylingRangeTail(tStylingRange) {\n    ngDevMode && assertNumber(tStylingRange, 'expected number');\n    const next = getTStylingRangeNext(tStylingRange);\n    return next === 0 ? getTStylingRangePrev(tStylingRange) : next;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Patch a `debug` property on top of the existing object.\n *\n * NOTE: always call this method with `ngDevMode && attachDebugObject(...)`\n *\n * @param obj Object to patch\n * @param debug Value to patch\n */\nfunction attachDebugObject(obj, debug) {\n    if (ngDevMode) {\n        Object.defineProperty(obj, 'debug', { value: debug, enumerable: false });\n    }\n    else {\n        throw new Error('This method should be guarded with `ngDevMode` so that it can be tree shaken in production!');\n    }\n}\n/**\n * Patch a `debug` property getter on top of the existing object.\n *\n * NOTE: always call this method with `ngDevMode && attachDebugObject(...)`\n *\n * @param obj Object to patch\n * @param debugGetter Getter returning a value to patch\n */\nfunction attachDebugGetter(obj, debugGetter) {\n    if (ngDevMode) {\n        Object.defineProperty(obj, 'debug', { get: debugGetter, enumerable: false });\n    }\n    else {\n        throw new Error('This method should be guarded with `ngDevMode` so that it can be tree shaken in production!');\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst NG_DEV_MODE = ((typeof ngDevMode === 'undefined' || !!ngDevMode) && initNgDevMode());\n/*\n * This file contains conditionally attached classes which provide human readable (debug) level\n * information for `LView`, `LContainer` and other internal data structures. These data structures\n * are stored internally as array which makes it very difficult during debugging to reason about the\n * current state of the system.\n *\n * Patching the array with extra property does change the array's hidden class' but it does not\n * change the cost of access, therefore this patching should not have significant if any impact in\n * `ngDevMode` mode. (see: https://jsperf.com/array-vs-monkey-patch-array)\n *\n * So instead of seeing:\n * ```\n * Array(30) [Object, 659, null, …]\n * ```\n *\n * You get to see:\n * ```\n * LViewDebug {\n *   views: [...],\n *   flags: {attached: true, ...}\n *   nodes: [\n *     {html: '<div id=\"123\">', ..., nodes: [\n *       {html: '<span>', ..., nodes: null}\n *     ]}\n *   ]\n * }\n * ```\n */\nlet LVIEW_COMPONENT_CACHE;\nlet LVIEW_EMBEDDED_CACHE;\nlet LVIEW_ROOT;\n/**\n * This function clones a blueprint and creates LView.\n *\n * Simple slice will keep the same type, and we need it to be LView\n */\nfunction cloneToLViewFromTViewBlueprint(tView) {\n    const debugTView = tView;\n    const lView = getLViewToClone(debugTView.type, tView.template && tView.template.name);\n    return lView.concat(tView.blueprint);\n}\nfunction getLViewToClone(type, name) {\n    switch (type) {\n        case 0 /* Root */:\n            if (LVIEW_ROOT === undefined)\n                LVIEW_ROOT = new (createNamedArrayType('LRootView'))();\n            return LVIEW_ROOT;\n        case 1 /* Component */:\n            if (LVIEW_COMPONENT_CACHE === undefined)\n                LVIEW_COMPONENT_CACHE = new Map();\n            let componentArray = LVIEW_COMPONENT_CACHE.get(name);\n            if (componentArray === undefined) {\n                componentArray = new (createNamedArrayType('LComponentView' + nameSuffix(name)))();\n                LVIEW_COMPONENT_CACHE.set(name, componentArray);\n            }\n            return componentArray;\n        case 2 /* Embedded */:\n            if (LVIEW_EMBEDDED_CACHE === undefined)\n                LVIEW_EMBEDDED_CACHE = new Map();\n            let embeddedArray = LVIEW_EMBEDDED_CACHE.get(name);\n            if (embeddedArray === undefined) {\n                embeddedArray = new (createNamedArrayType('LEmbeddedView' + nameSuffix(name)))();\n                LVIEW_EMBEDDED_CACHE.set(name, embeddedArray);\n            }\n            return embeddedArray;\n    }\n    throw new Error('unreachable code');\n}\nfunction nameSuffix(text) {\n    if (text == null)\n        return '';\n    const index = text.lastIndexOf('_Template');\n    return '_' + (index === -1 ? text : text.substr(0, index));\n}\n/**\n * This class is a debug version of Object literal so that we can have constructor name show up\n * in\n * debug tools in ngDevMode.\n */\nconst TViewConstructor = class TView {\n    constructor(type, //\n    id, //\n    blueprint, //\n    template, //\n    queries, //\n    viewQuery, //\n    node, //\n    data, //\n    bindingStartIndex, //\n    expandoStartIndex, //\n    expandoInstructions, //\n    firstCreatePass, //\n    firstUpdatePass, //\n    staticViewQueries, //\n    staticContentQueries, //\n    preOrderHooks, //\n    preOrderCheckHooks, //\n    contentHooks, //\n    contentCheckHooks, //\n    viewHooks, //\n    viewCheckHooks, //\n    destroyHooks, //\n    cleanup, //\n    contentQueries, //\n    components, //\n    directiveRegistry, //\n    pipeRegistry, //\n    firstChild, //\n    schemas, //\n    consts, //\n    incompleteFirstPass, //\n    _decls, //\n    _vars) {\n        this.type = type;\n        this.id = id;\n        this.blueprint = blueprint;\n        this.template = template;\n        this.queries = queries;\n        this.viewQuery = viewQuery;\n        this.node = node;\n        this.data = data;\n        this.bindingStartIndex = bindingStartIndex;\n        this.expandoStartIndex = expandoStartIndex;\n        this.expandoInstructions = expandoInstructions;\n        this.firstCreatePass = firstCreatePass;\n        this.firstUpdatePass = firstUpdatePass;\n        this.staticViewQueries = staticViewQueries;\n        this.staticContentQueries = staticContentQueries;\n        this.preOrderHooks = preOrderHooks;\n        this.preOrderCheckHooks = preOrderCheckHooks;\n        this.contentHooks = contentHooks;\n        this.contentCheckHooks = contentCheckHooks;\n        this.viewHooks = viewHooks;\n        this.viewCheckHooks = viewCheckHooks;\n        this.destroyHooks = destroyHooks;\n        this.cleanup = cleanup;\n        this.contentQueries = contentQueries;\n        this.components = components;\n        this.directiveRegistry = directiveRegistry;\n        this.pipeRegistry = pipeRegistry;\n        this.firstChild = firstChild;\n        this.schemas = schemas;\n        this.consts = consts;\n        this.incompleteFirstPass = incompleteFirstPass;\n        this._decls = _decls;\n        this._vars = _vars;\n    }\n    get template_() {\n        const buf = [];\n        processTNodeChildren(this.firstChild, buf);\n        return buf.join('');\n    }\n};\nclass TNode {\n    constructor(tView_, //\n    type, //\n    index, //\n    injectorIndex, //\n    directiveStart, //\n    directiveEnd, //\n    directiveStylingLast, //\n    propertyBindings, //\n    flags, //\n    providerIndexes, //\n    tagName, //\n    attrs, //\n    mergedAttrs, //\n    localNames, //\n    initialInputs, //\n    inputs, //\n    outputs, //\n    tViews, //\n    next, //\n    projectionNext, //\n    child, //\n    parent, //\n    projection, //\n    styles, //\n    stylesWithoutHost, //\n    residualStyles, //\n    classes, //\n    classesWithoutHost, //\n    residualClasses, //\n    classBindings, //\n    styleBindings) {\n        this.tView_ = tView_;\n        this.type = type;\n        this.index = index;\n        this.injectorIndex = injectorIndex;\n        this.directiveStart = directiveStart;\n        this.directiveEnd = directiveEnd;\n        this.directiveStylingLast = directiveStylingLast;\n        this.propertyBindings = propertyBindings;\n        this.flags = flags;\n        this.providerIndexes = providerIndexes;\n        this.tagName = tagName;\n        this.attrs = attrs;\n        this.mergedAttrs = mergedAttrs;\n        this.localNames = localNames;\n        this.initialInputs = initialInputs;\n        this.inputs = inputs;\n        this.outputs = outputs;\n        this.tViews = tViews;\n        this.next = next;\n        this.projectionNext = projectionNext;\n        this.child = child;\n        this.parent = parent;\n        this.projection = projection;\n        this.styles = styles;\n        this.stylesWithoutHost = stylesWithoutHost;\n        this.residualStyles = residualStyles;\n        this.classes = classes;\n        this.classesWithoutHost = classesWithoutHost;\n        this.residualClasses = residualClasses;\n        this.classBindings = classBindings;\n        this.styleBindings = styleBindings;\n    }\n    get type_() {\n        switch (this.type) {\n            case 0 /* Container */:\n                return 'TNodeType.Container';\n            case 3 /* Element */:\n                return 'TNodeType.Element';\n            case 4 /* ElementContainer */:\n                return 'TNodeType.ElementContainer';\n            case 5 /* IcuContainer */:\n                return 'TNodeType.IcuContainer';\n            case 1 /* Projection */:\n                return 'TNodeType.Projection';\n            case 2 /* View */:\n                return 'TNodeType.View';\n            default:\n                return 'TNodeType.???';\n        }\n    }\n    get flags_() {\n        const flags = [];\n        if (this.flags & 16 /* hasClassInput */)\n            flags.push('TNodeFlags.hasClassInput');\n        if (this.flags & 8 /* hasContentQuery */)\n            flags.push('TNodeFlags.hasContentQuery');\n        if (this.flags & 32 /* hasStyleInput */)\n            flags.push('TNodeFlags.hasStyleInput');\n        if (this.flags & 128 /* hasHostBindings */)\n            flags.push('TNodeFlags.hasHostBindings');\n        if (this.flags & 2 /* isComponentHost */)\n            flags.push('TNodeFlags.isComponentHost');\n        if (this.flags & 1 /* isDirectiveHost */)\n            flags.push('TNodeFlags.isDirectiveHost');\n        if (this.flags & 64 /* isDetached */)\n            flags.push('TNodeFlags.isDetached');\n        if (this.flags & 4 /* isProjected */)\n            flags.push('TNodeFlags.isProjected');\n        return flags.join('|');\n    }\n    get template_() {\n        const buf = [];\n        buf.push('<', this.tagName || this.type_);\n        if (this.attrs) {\n            for (let i = 0; i < this.attrs.length;) {\n                const attrName = this.attrs[i++];\n                if (typeof attrName == 'number') {\n                    break;\n                }\n                const attrValue = this.attrs[i++];\n                buf.push(' ', attrName, '=\"', attrValue, '\"');\n            }\n        }\n        buf.push('>');\n        processTNodeChildren(this.child, buf);\n        buf.push('</', this.tagName || this.type_, '>');\n        return buf.join('');\n    }\n    get styleBindings_() {\n        return toDebugStyleBinding(this, false);\n    }\n    get classBindings_() {\n        return toDebugStyleBinding(this, true);\n    }\n}\nconst TNodeDebug = TNode;\nfunction toDebugStyleBinding(tNode, isClassBased) {\n    const tData = tNode.tView_.data;\n    const bindings = [];\n    const range = isClassBased ? tNode.classBindings : tNode.styleBindings;\n    const prev = getTStylingRangePrev(range);\n    const next = getTStylingRangeNext(range);\n    let isTemplate = next !== 0;\n    let cursor = isTemplate ? next : prev;\n    while (cursor !== 0) {\n        const itemKey = tData[cursor];\n        const itemRange = tData[cursor + 1];\n        bindings.unshift({\n            key: itemKey,\n            index: cursor,\n            isTemplate: isTemplate,\n            prevDuplicate: getTStylingRangePrevDuplicate(itemRange),\n            nextDuplicate: getTStylingRangeNextDuplicate(itemRange),\n            nextIndex: getTStylingRangeNext(itemRange),\n            prevIndex: getTStylingRangePrev(itemRange),\n        });\n        if (cursor === prev)\n            isTemplate = false;\n        cursor = getTStylingRangePrev(itemRange);\n    }\n    bindings.push((isClassBased ? tNode.residualClasses : tNode.residualStyles) || null);\n    return bindings;\n}\nfunction processTNodeChildren(tNode, buf) {\n    while (tNode) {\n        buf.push(tNode.template_);\n        tNode = tNode.next;\n    }\n}\nconst TViewData = NG_DEV_MODE && createNamedArrayType('TViewData') || null;\nlet TVIEWDATA_EMPTY; // can't initialize here or it will not be tree shaken, because\n// `LView` constructor could have side-effects.\n/**\n * This function clones a blueprint and creates TData.\n *\n * Simple slice will keep the same type, and we need it to be TData\n */\nfunction cloneToTViewData(list) {\n    if (TVIEWDATA_EMPTY === undefined)\n        TVIEWDATA_EMPTY = new TViewData();\n    return TVIEWDATA_EMPTY.concat(list);\n}\nconst LViewBlueprint = NG_DEV_MODE && createNamedArrayType('LViewBlueprint') || null;\nconst MatchesArray = NG_DEV_MODE && createNamedArrayType('MatchesArray') || null;\nconst TViewComponents = NG_DEV_MODE && createNamedArrayType('TViewComponents') || null;\nconst TNodeLocalNames = NG_DEV_MODE && createNamedArrayType('TNodeLocalNames') || null;\nconst TNodeInitialInputs = NG_DEV_MODE && createNamedArrayType('TNodeInitialInputs') || null;\nconst TNodeInitialData = NG_DEV_MODE && createNamedArrayType('TNodeInitialData') || null;\nconst LCleanup = NG_DEV_MODE && createNamedArrayType('LCleanup') || null;\nconst TCleanup = NG_DEV_MODE && createNamedArrayType('TCleanup') || null;\nfunction attachLViewDebug(lView) {\n    attachDebugObject(lView, new LViewDebug(lView));\n}\nfunction attachLContainerDebug(lContainer) {\n    attachDebugObject(lContainer, new LContainerDebug(lContainer));\n}\nfunction toDebug(obj) {\n    if (obj) {\n        const debug = obj.debug;\n        assertDefined(debug, 'Object does not have a debug representation.');\n        return debug;\n    }\n    else {\n        return obj;\n    }\n}\n/**\n * Use this method to unwrap a native element in `LView` and convert it into HTML for easier\n * reading.\n *\n * @param value possibly wrapped native DOM node.\n * @param includeChildren If `true` then the serialized HTML form will include child elements\n * (same\n * as `outerHTML`). If `false` then the serialized HTML form will only contain the element\n * itself\n * (will not serialize child elements).\n */\nfunction toHtml(value, includeChildren = false) {\n    const node = unwrapRNode(value);\n    if (node) {\n        switch (node.nodeType) {\n            case Node.TEXT_NODE:\n                return node.textContent;\n            case Node.COMMENT_NODE:\n                return `<!--${node.textContent}-->`;\n            case Node.ELEMENT_NODE:\n                const outerHTML = node.outerHTML;\n                if (includeChildren) {\n                    return outerHTML;\n                }\n                else {\n                    const innerHTML = '>' + node.innerHTML + '<';\n                    return (outerHTML.split(innerHTML)[0]) + '>';\n                }\n        }\n    }\n    return null;\n}\nclass LViewDebug {\n    constructor(_raw_lView) {\n        this._raw_lView = _raw_lView;\n    }\n    /**\n     * Flags associated with the `LView` unpacked into a more readable state.\n     */\n    get flags() {\n        const flags = this._raw_lView[FLAGS];\n        return {\n            __raw__flags__: flags,\n            initPhaseState: flags & 3 /* InitPhaseStateMask */,\n            creationMode: !!(flags & 4 /* CreationMode */),\n            firstViewPass: !!(flags & 8 /* FirstLViewPass */),\n            checkAlways: !!(flags & 16 /* CheckAlways */),\n            dirty: !!(flags & 64 /* Dirty */),\n            attached: !!(flags & 128 /* Attached */),\n            destroyed: !!(flags & 256 /* Destroyed */),\n            isRoot: !!(flags & 512 /* IsRoot */),\n            indexWithinInitPhase: flags >> 11 /* IndexWithinInitPhaseShift */,\n        };\n    }\n    get parent() {\n        return toDebug(this._raw_lView[PARENT]);\n    }\n    get hostHTML() {\n        return toHtml(this._raw_lView[HOST], true);\n    }\n    get html() {\n        return (this.nodes || []).map(node => toHtml(node.native, true)).join('');\n    }\n    get context() {\n        return this._raw_lView[CONTEXT];\n    }\n    /**\n     * The tree of nodes associated with the current `LView`. The nodes have been normalized into\n     * a tree structure with relevant details pulled out for readability.\n     */\n    get nodes() {\n        const lView = this._raw_lView;\n        const tNode = lView[TVIEW].firstChild;\n        return toDebugNodes(tNode, lView);\n    }\n    get tView() {\n        return this._raw_lView[TVIEW];\n    }\n    get cleanup() {\n        return this._raw_lView[CLEANUP];\n    }\n    get injector() {\n        return this._raw_lView[INJECTOR$1];\n    }\n    get rendererFactory() {\n        return this._raw_lView[RENDERER_FACTORY];\n    }\n    get renderer() {\n        return this._raw_lView[RENDERER];\n    }\n    get sanitizer() {\n        return this._raw_lView[SANITIZER];\n    }\n    get childHead() {\n        return toDebug(this._raw_lView[CHILD_HEAD]);\n    }\n    get next() {\n        return toDebug(this._raw_lView[NEXT]);\n    }\n    get childTail() {\n        return toDebug(this._raw_lView[CHILD_TAIL]);\n    }\n    get declarationView() {\n        return toDebug(this._raw_lView[DECLARATION_VIEW]);\n    }\n    get queries() {\n        return this._raw_lView[QUERIES];\n    }\n    get tHost() {\n        return this._raw_lView[T_HOST];\n    }\n    get decls() {\n        const tView = this.tView;\n        const start = HEADER_OFFSET;\n        return toLViewRange(this.tView, this._raw_lView, start, start + tView._decls);\n    }\n    get vars() {\n        const tView = this.tView;\n        const start = HEADER_OFFSET + tView._decls;\n        return toLViewRange(this.tView, this._raw_lView, start, start + tView._vars);\n    }\n    get i18n() {\n        const tView = this.tView;\n        const start = HEADER_OFFSET + tView._decls + tView._vars;\n        return toLViewRange(this.tView, this._raw_lView, start, this.tView.expandoStartIndex);\n    }\n    get expando() {\n        const tView = this.tView;\n        return toLViewRange(this.tView, this._raw_lView, this.tView.expandoStartIndex, this._raw_lView.length);\n    }\n    /**\n     * Normalized view of child views (and containers) attached at this location.\n     */\n    get childViews() {\n        const childViews = [];\n        let child = this.childHead;\n        while (child) {\n            childViews.push(child);\n            child = child.next;\n        }\n        return childViews;\n    }\n}\nfunction toLViewRange(tView, lView, start, end) {\n    let content = [];\n    for (let index = start; index < end; index++) {\n        content.push({ index: index, t: tView.data[index], l: lView[index] });\n    }\n    return { start: start, end: end, length: end - start, content: content };\n}\n/**\n * Turns a flat list of nodes into a tree by walking the associated `TNode` tree.\n *\n * @param tNode\n * @param lView\n */\nfunction toDebugNodes(tNode, lView) {\n    if (tNode) {\n        const debugNodes = [];\n        let tNodeCursor = tNode;\n        while (tNodeCursor) {\n            debugNodes.push(buildDebugNode(tNodeCursor, lView, tNodeCursor.index));\n            tNodeCursor = tNodeCursor.next;\n        }\n        return debugNodes;\n    }\n    else {\n        return [];\n    }\n}\nfunction buildDebugNode(tNode, lView, nodeIndex) {\n    const rawValue = lView[nodeIndex];\n    const native = unwrapRNode(rawValue);\n    return {\n        html: toHtml(native),\n        type: TNodeTypeAsString[tNode.type],\n        native: native,\n        children: toDebugNodes(tNode.child, lView),\n    };\n}\nclass LContainerDebug {\n    constructor(_raw_lContainer) {\n        this._raw_lContainer = _raw_lContainer;\n    }\n    get hasTransplantedViews() {\n        return this._raw_lContainer[HAS_TRANSPLANTED_VIEWS];\n    }\n    get views() {\n        return this._raw_lContainer.slice(CONTAINER_HEADER_OFFSET)\n            .map(toDebug);\n    }\n    get parent() {\n        return toDebug(this._raw_lContainer[PARENT]);\n    }\n    get movedViews() {\n        return this._raw_lContainer[MOVED_VIEWS];\n    }\n    get host() {\n        return this._raw_lContainer[HOST];\n    }\n    get native() {\n        return this._raw_lContainer[NATIVE];\n    }\n    get next() {\n        return toDebug(this._raw_lContainer[NEXT]);\n    }\n}\n/**\n * Return an `LView` value if found.\n *\n * @param value `LView` if any\n */\nfunction readLViewValue(value) {\n    while (Array.isArray(value)) {\n        // This check is not quite right, as it does not take into account `StylingContext`\n        // This is why it is in debug, not in util.ts\n        if (value.length >= HEADER_OFFSET - 1)\n            return value;\n        value = value[HOST];\n    }\n    return null;\n}\n\nconst ɵ0$4 = () => Promise.resolve(null);\n/**\n * A permanent marker promise which signifies that the current CD tree is\n * clean.\n */\nconst _CLEAN_PROMISE = (ɵ0$4)();\n/**\n * Process the `TView.expandoInstructions`. (Execute the `hostBindings`.)\n *\n * @param tView `TView` containing the `expandoInstructions`\n * @param lView `LView` associated with the `TView`\n */\nfunction setHostBindingsByExecutingExpandoInstructions(tView, lView) {\n    ngDevMode && assertSame(tView, lView[TVIEW], '`LView` is not associated with the `TView`!');\n    try {\n        const expandoInstructions = tView.expandoInstructions;\n        if (expandoInstructions !== null) {\n            let bindingRootIndex = tView.expandoStartIndex;\n            let currentDirectiveIndex = -1;\n            let currentElementIndex = -1;\n            // TODO(misko): PERF It is possible to get here with `TView.expandoInstructions` containing no\n            // functions to execute. This is wasteful as there is no work to be done, but we still need\n            // to iterate over the instructions.\n            // In example of this is in this test: `host_binding_spec.ts`\n            // `fit('should not cause problems if detectChanges is called when a property updates', ...`\n            // In the above test we get here with expando [0, 0, 1] which requires a lot of processing but\n            // there is no function to execute.\n            for (let i = 0; i < expandoInstructions.length; i++) {\n                const instruction = expandoInstructions[i];\n                if (typeof instruction === 'number') {\n                    if (instruction <= 0) {\n                        // Negative numbers mean that we are starting new EXPANDO block and need to update\n                        // the current element and directive index.\n                        // Important: In JS `-x` and `0-x` is not the same! If `x===0` then `-x` will produce\n                        // `-0` which requires non standard math arithmetic and it can prevent VM optimizations.\n                        // `0-0` will always produce `0` and will not cause a potential deoptimization in VM.\n                        // TODO(misko): PERF This should be refactored to use `~instruction` as that does not\n                        // suffer from `-0` and it is faster/more compact.\n                        currentElementIndex = 0 - instruction;\n                        setSelectedIndex(currentElementIndex);\n                        // Injector block and providers are taken into account.\n                        const providerCount = expandoInstructions[++i];\n                        bindingRootIndex += INJECTOR_BLOOM_PARENT_SIZE + providerCount;\n                        currentDirectiveIndex = bindingRootIndex;\n                    }\n                    else {\n                        // This is either the injector size (so the binding root can skip over directives\n                        // and get to the first set of host bindings on this node) or the host var count\n                        // (to get to the next set of host bindings on this node).\n                        bindingRootIndex += instruction;\n                    }\n                }\n                else {\n                    // If it's not a number, it's a host binding function that needs to be executed.\n                    if (instruction !== null) {\n                        ngDevMode &&\n                            assertLessThan(currentDirectiveIndex, 1048576 /* CptViewProvidersCountShifter */, 'Reached the max number of host bindings');\n                        setBindingRootForHostBindings(bindingRootIndex, currentDirectiveIndex);\n                        const hostCtx = lView[currentDirectiveIndex];\n                        instruction(2 /* Update */, hostCtx);\n                    }\n                    // TODO(misko): PERF Relying on incrementing the `currentDirectiveIndex` here is\n                    // sub-optimal. The implications are that if we have a lot of directives but none of them\n                    // have host bindings we nevertheless need to iterate over the expando instructions to\n                    // update the counter. It would be much better if we could encode the\n                    // `currentDirectiveIndex` into the `expandoInstruction` array so that we only need to\n                    // iterate over those directives which actually have `hostBindings`.\n                    currentDirectiveIndex++;\n                }\n            }\n        }\n    }\n    finally {\n        setSelectedIndex(-1);\n    }\n}\n/** Refreshes all content queries declared by directives in a given view */\nfunction refreshContentQueries(tView, lView) {\n    const contentQueries = tView.contentQueries;\n    if (contentQueries !== null) {\n        for (let i = 0; i < contentQueries.length; i += 2) {\n            const queryStartIdx = contentQueries[i];\n            const directiveDefIdx = contentQueries[i + 1];\n            if (directiveDefIdx !== -1) {\n                const directiveDef = tView.data[directiveDefIdx];\n                ngDevMode &&\n                    assertDefined(directiveDef.contentQueries, 'contentQueries function should be defined');\n                setCurrentQueryIndex(queryStartIdx);\n                directiveDef.contentQueries(2 /* Update */, lView[directiveDefIdx], directiveDefIdx);\n            }\n        }\n    }\n}\n/** Refreshes child components in the current view (update mode). */\nfunction refreshChildComponents(hostLView, components) {\n    for (let i = 0; i < components.length; i++) {\n        refreshComponent(hostLView, components[i]);\n    }\n}\n/** Renders child components in the current view (creation mode). */\nfunction renderChildComponents(hostLView, components) {\n    for (let i = 0; i < components.length; i++) {\n        renderComponent(hostLView, components[i]);\n    }\n}\n/**\n * Creates a native element from a tag name, using a renderer.\n * @param name the tag name\n * @param renderer A renderer to use\n * @returns the element created\n */\nfunction elementCreate(name, renderer, namespace) {\n    if (isProceduralRenderer(renderer)) {\n        return renderer.createElement(name, namespace);\n    }\n    else {\n        return namespace === null ? renderer.createElement(name) :\n            renderer.createElementNS(namespace, name);\n    }\n}\nfunction createLView(parentLView, tView, context, flags, host, tHostNode, rendererFactory, renderer, sanitizer, injector) {\n    const lView = ngDevMode ? cloneToLViewFromTViewBlueprint(tView) : tView.blueprint.slice();\n    lView[HOST] = host;\n    lView[FLAGS] = flags | 4 /* CreationMode */ | 128 /* Attached */ | 8 /* FirstLViewPass */;\n    resetPreOrderHookFlags(lView);\n    lView[PARENT] = lView[DECLARATION_VIEW] = parentLView;\n    lView[CONTEXT] = context;\n    lView[RENDERER_FACTORY] = (rendererFactory || parentLView && parentLView[RENDERER_FACTORY]);\n    ngDevMode && assertDefined(lView[RENDERER_FACTORY], 'RendererFactory is required');\n    lView[RENDERER] = (renderer || parentLView && parentLView[RENDERER]);\n    ngDevMode && assertDefined(lView[RENDERER], 'Renderer is required');\n    lView[SANITIZER] = sanitizer || parentLView && parentLView[SANITIZER] || null;\n    lView[INJECTOR$1] = injector || parentLView && parentLView[INJECTOR$1] || null;\n    lView[T_HOST] = tHostNode;\n    ngDevMode &&\n        assertEqual(tView.type == 2 /* Embedded */ ? parentLView !== null : true, true, 'Embedded views must have parentLView');\n    lView[DECLARATION_COMPONENT_VIEW] =\n        tView.type == 2 /* Embedded */ ? parentLView[DECLARATION_COMPONENT_VIEW] : lView;\n    ngDevMode && attachLViewDebug(lView);\n    return lView;\n}\nfunction getOrCreateTNode(tView, tHostNode, index, type, name, attrs) {\n    // Keep this function short, so that the VM will inline it.\n    const adjustedIndex = index + HEADER_OFFSET;\n    const tNode = tView.data[adjustedIndex] ||\n        createTNodeAtIndex(tView, tHostNode, adjustedIndex, type, name, attrs);\n    setPreviousOrParentTNode(tNode, true);\n    return tNode;\n}\nfunction createTNodeAtIndex(tView, tHostNode, adjustedIndex, type, name, attrs) {\n    const previousOrParentTNode = getPreviousOrParentTNode();\n    const isParent = getIsParent();\n    const parent = isParent ? previousOrParentTNode : previousOrParentTNode && previousOrParentTNode.parent;\n    // Parents cannot cross component boundaries because components will be used in multiple places,\n    // so it's only set if the view is the same.\n    const parentInSameView = parent && parent !== tHostNode;\n    const tParentNode = parentInSameView ? parent : null;\n    const tNode = tView.data[adjustedIndex] =\n        createTNode(tView, tParentNode, type, adjustedIndex, name, attrs);\n    // Assign a pointer to the first child node of a given view. The first node is not always the one\n    // at index 0, in case of i18n, index 0 can be the instruction `i18nStart` and the first node has\n    // the index 1 or more, so we can't just check node index.\n    if (tView.firstChild === null) {\n        tView.firstChild = tNode;\n    }\n    if (previousOrParentTNode) {\n        if (isParent && previousOrParentTNode.child == null &&\n            (tNode.parent !== null || previousOrParentTNode.type === 2 /* View */)) {\n            // We are in the same view, which means we are adding content node to the parent view.\n            previousOrParentTNode.child = tNode;\n        }\n        else if (!isParent) {\n            previousOrParentTNode.next = tNode;\n        }\n    }\n    return tNode;\n}\nfunction assignTViewNodeToLView(tView, tParentNode, index, lView) {\n    // View nodes are not stored in data because they can be added / removed at runtime (which\n    // would cause indices to change). Their TNodes are instead stored in tView.node.\n    let tNode = tView.node;\n    if (tNode == null) {\n        ngDevMode && tParentNode &&\n            assertNodeOfPossibleTypes(tParentNode, [3 /* Element */, 0 /* Container */]);\n        tView.node = tNode = createTNode(tView, tParentNode, //\n        2 /* View */, index, null, null);\n    }\n    lView[T_HOST] = tNode;\n}\n/**\n * When elements are created dynamically after a view blueprint is created (e.g. through\n * i18nApply() or ComponentFactory.create), we need to adjust the blueprint for future\n * template passes.\n *\n * @param tView `TView` associated with `LView`\n * @param view The `LView` containing the blueprint to adjust\n * @param numSlotsToAlloc The number of slots to alloc in the LView, should be >0\n */\nfunction allocExpando(tView, lView, numSlotsToAlloc) {\n    ngDevMode &&\n        assertGreaterThan(numSlotsToAlloc, 0, 'The number of slots to alloc should be greater than 0');\n    if (numSlotsToAlloc > 0) {\n        if (tView.firstCreatePass) {\n            for (let i = 0; i < numSlotsToAlloc; i++) {\n                tView.blueprint.push(null);\n                tView.data.push(null);\n                lView.push(null);\n            }\n            // We should only increment the expando start index if there aren't already directives\n            // and injectors saved in the \"expando\" section\n            if (!tView.expandoInstructions) {\n                tView.expandoStartIndex += numSlotsToAlloc;\n            }\n            else {\n                // Since we're adding the dynamic nodes into the expando section, we need to let the host\n                // bindings know that they should skip x slots\n                tView.expandoInstructions.push(numSlotsToAlloc);\n            }\n        }\n    }\n}\n//////////////////////////\n//// Render\n//////////////////////////\n/**\n * Processes a view in the creation mode. This includes a number of steps in a specific order:\n * - creating view query functions (if any);\n * - executing a template function in the creation mode;\n * - updating static queries (if any);\n * - creating child components defined in a given view.\n */\nfunction renderView(tView, lView, context) {\n    ngDevMode && assertEqual(isCreationMode(lView), true, 'Should be run in creation mode');\n    enterView(lView, lView[T_HOST]);\n    try {\n        const viewQuery = tView.viewQuery;\n        if (viewQuery !== null) {\n            executeViewQueryFn(1 /* Create */, viewQuery, context);\n        }\n        // Execute a template associated with this view, if it exists. A template function might not be\n        // defined for the root component views.\n        const templateFn = tView.template;\n        if (templateFn !== null) {\n            executeTemplate(tView, lView, templateFn, 1 /* Create */, context);\n        }\n        // This needs to be set before children are processed to support recursive components.\n        // This must be set to false immediately after the first creation run because in an\n        // ngFor loop, all the views will be created together before update mode runs and turns\n        // off firstCreatePass. If we don't set it here, instances will perform directive\n        // matching, etc again and again.\n        if (tView.firstCreatePass) {\n            tView.firstCreatePass = false;\n        }\n        // We resolve content queries specifically marked as `static` in creation mode. Dynamic\n        // content queries are resolved during change detection (i.e. update mode), after embedded\n        // views are refreshed (see block above).\n        if (tView.staticContentQueries) {\n            refreshContentQueries(tView, lView);\n        }\n        // We must materialize query results before child components are processed\n        // in case a child component has projected a container. The LContainer needs\n        // to exist so the embedded views are properly attached by the container.\n        if (tView.staticViewQueries) {\n            executeViewQueryFn(2 /* Update */, tView.viewQuery, context);\n        }\n        // Render child component views.\n        const components = tView.components;\n        if (components !== null) {\n            renderChildComponents(lView, components);\n        }\n    }\n    catch (error) {\n        // If we didn't manage to get past the first template pass due to\n        // an error, mark the view as corrupted so we can try to recover.\n        if (tView.firstCreatePass) {\n            tView.incompleteFirstPass = true;\n        }\n        throw error;\n    }\n    finally {\n        lView[FLAGS] &= ~4 /* CreationMode */;\n        leaveView();\n    }\n}\n/**\n * Processes a view in update mode. This includes a number of steps in a specific order:\n * - executing a template function in update mode;\n * - executing hooks;\n * - refreshing queries;\n * - setting host bindings;\n * - refreshing child (embedded and component) views.\n */\nfunction refreshView(tView, lView, templateFn, context) {\n    ngDevMode && assertEqual(isCreationMode(lView), false, 'Should be run in update mode');\n    const flags = lView[FLAGS];\n    if ((flags & 256 /* Destroyed */) === 256 /* Destroyed */)\n        return;\n    enterView(lView, lView[T_HOST]);\n    const checkNoChangesMode = getCheckNoChangesMode();\n    try {\n        resetPreOrderHookFlags(lView);\n        setBindingIndex(tView.bindingStartIndex);\n        if (templateFn !== null) {\n            executeTemplate(tView, lView, templateFn, 2 /* Update */, context);\n        }\n        const hooksInitPhaseCompleted = (flags & 3 /* InitPhaseStateMask */) === 3 /* InitPhaseCompleted */;\n        // execute pre-order hooks (OnInit, OnChanges, DoCheck)\n        // PERF WARNING: do NOT extract this to a separate function without running benchmarks\n        if (!checkNoChangesMode) {\n            if (hooksInitPhaseCompleted) {\n                const preOrderCheckHooks = tView.preOrderCheckHooks;\n                if (preOrderCheckHooks !== null) {\n                    executeCheckHooks(lView, preOrderCheckHooks, null);\n                }\n            }\n            else {\n                const preOrderHooks = tView.preOrderHooks;\n                if (preOrderHooks !== null) {\n                    executeInitAndCheckHooks(lView, preOrderHooks, 0 /* OnInitHooksToBeRun */, null);\n                }\n                incrementInitPhaseFlags(lView, 0 /* OnInitHooksToBeRun */);\n            }\n        }\n        // First mark transplanted views that are declared in this lView as needing a refresh at their\n        // insertion points. This is needed to avoid the situation where the template is defined in this\n        // `LView` but its declaration appears after the insertion component.\n        markTransplantedViewsForRefresh(lView);\n        refreshEmbeddedViews(lView);\n        // Content query results must be refreshed before content hooks are called.\n        if (tView.contentQueries !== null) {\n            refreshContentQueries(tView, lView);\n        }\n        // execute content hooks (AfterContentInit, AfterContentChecked)\n        // PERF WARNING: do NOT extract this to a separate function without running benchmarks\n        if (!checkNoChangesMode) {\n            if (hooksInitPhaseCompleted) {\n                const contentCheckHooks = tView.contentCheckHooks;\n                if (contentCheckHooks !== null) {\n                    executeCheckHooks(lView, contentCheckHooks);\n                }\n            }\n            else {\n                const contentHooks = tView.contentHooks;\n                if (contentHooks !== null) {\n                    executeInitAndCheckHooks(lView, contentHooks, 1 /* AfterContentInitHooksToBeRun */);\n                }\n                incrementInitPhaseFlags(lView, 1 /* AfterContentInitHooksToBeRun */);\n            }\n        }\n        setHostBindingsByExecutingExpandoInstructions(tView, lView);\n        // Refresh child component views.\n        const components = tView.components;\n        if (components !== null) {\n            refreshChildComponents(lView, components);\n        }\n        // View queries must execute after refreshing child components because a template in this view\n        // could be inserted in a child component. If the view query executes before child component\n        // refresh, the template might not yet be inserted.\n        const viewQuery = tView.viewQuery;\n        if (viewQuery !== null) {\n            executeViewQueryFn(2 /* Update */, viewQuery, context);\n        }\n        // execute view hooks (AfterViewInit, AfterViewChecked)\n        // PERF WARNING: do NOT extract this to a separate function without running benchmarks\n        if (!checkNoChangesMode) {\n            if (hooksInitPhaseCompleted) {\n                const viewCheckHooks = tView.viewCheckHooks;\n                if (viewCheckHooks !== null) {\n                    executeCheckHooks(lView, viewCheckHooks);\n                }\n            }\n            else {\n                const viewHooks = tView.viewHooks;\n                if (viewHooks !== null) {\n                    executeInitAndCheckHooks(lView, viewHooks, 2 /* AfterViewInitHooksToBeRun */);\n                }\n                incrementInitPhaseFlags(lView, 2 /* AfterViewInitHooksToBeRun */);\n            }\n        }\n        if (tView.firstUpdatePass === true) {\n            // We need to make sure that we only flip the flag on successful `refreshView` only\n            // Don't do this in `finally` block.\n            // If we did this in `finally` block then an exception could block the execution of styling\n            // instructions which in turn would be unable to insert themselves into the styling linked\n            // list. The result of this would be that if the exception would not be throw on subsequent CD\n            // the styling would be unable to process it data and reflect to the DOM.\n            tView.firstUpdatePass = false;\n        }\n        // Do not reset the dirty state when running in check no changes mode. We don't want components\n        // to behave differently depending on whether check no changes is enabled or not. For example:\n        // Marking an OnPush component as dirty from within the `ngAfterViewInit` hook in order to\n        // refresh a `NgClass` binding should work. If we would reset the dirty state in the check\n        // no changes cycle, the component would be not be dirty for the next update pass. This would\n        // be different in production mode where the component dirty state is not reset.\n        if (!checkNoChangesMode) {\n            lView[FLAGS] &= ~(64 /* Dirty */ | 8 /* FirstLViewPass */);\n        }\n        if (lView[FLAGS] & 1024 /* RefreshTransplantedView */) {\n            lView[FLAGS] &= ~1024 /* RefreshTransplantedView */;\n            updateTransplantedViewCount(lView[PARENT], -1);\n        }\n    }\n    finally {\n        leaveView();\n    }\n}\nfunction renderComponentOrTemplate(tView, lView, templateFn, context) {\n    const rendererFactory = lView[RENDERER_FACTORY];\n    const normalExecutionPath = !getCheckNoChangesMode();\n    const creationModeIsActive = isCreationMode(lView);\n    try {\n        if (normalExecutionPath && !creationModeIsActive && rendererFactory.begin) {\n            rendererFactory.begin();\n        }\n        if (creationModeIsActive) {\n            renderView(tView, lView, context);\n        }\n        refreshView(tView, lView, templateFn, context);\n    }\n    finally {\n        if (normalExecutionPath && !creationModeIsActive && rendererFactory.end) {\n            rendererFactory.end();\n        }\n    }\n}\nfunction executeTemplate(tView, lView, templateFn, rf, context) {\n    const prevSelectedIndex = getSelectedIndex();\n    try {\n        setSelectedIndex(-1);\n        if (rf & 2 /* Update */ && lView.length > HEADER_OFFSET) {\n            // When we're updating, inherently select 0 so we don't\n            // have to generate that instruction for most update blocks.\n            selectIndexInternal(tView, lView, 0, getCheckNoChangesMode());\n        }\n        templateFn(rf, context);\n    }\n    finally {\n        setSelectedIndex(prevSelectedIndex);\n    }\n}\n//////////////////////////\n//// Element\n//////////////////////////\nfunction executeContentQueries(tView, tNode, lView) {\n    if (isContentQueryHost(tNode)) {\n        const start = tNode.directiveStart;\n        const end = tNode.directiveEnd;\n        for (let directiveIndex = start; directiveIndex < end; directiveIndex++) {\n            const def = tView.data[directiveIndex];\n            if (def.contentQueries) {\n                def.contentQueries(1 /* Create */, lView[directiveIndex], directiveIndex);\n            }\n        }\n    }\n}\n/**\n * Creates directive instances.\n */\nfunction createDirectivesInstances(tView, lView, tNode) {\n    if (!getBindingsEnabled())\n        return;\n    instantiateAllDirectives(tView, lView, tNode, getNativeByTNode(tNode, lView));\n    if ((tNode.flags & 128 /* hasHostBindings */) === 128 /* hasHostBindings */) {\n        invokeDirectivesHostBindings(tView, lView, tNode);\n    }\n}\n/**\n * Takes a list of local names and indices and pushes the resolved local variable values\n * to LView in the same order as they are loaded in the template with load().\n */\nfunction saveResolvedLocalsInData(viewData, tNode, localRefExtractor = getNativeByTNode) {\n    const localNames = tNode.localNames;\n    if (localNames !== null) {\n        let localIndex = tNode.index + 1;\n        for (let i = 0; i < localNames.length; i += 2) {\n            const index = localNames[i + 1];\n            const value = index === -1 ?\n                localRefExtractor(tNode, viewData) :\n                viewData[index];\n            viewData[localIndex++] = value;\n        }\n    }\n}\n/**\n * Gets TView from a template function or creates a new TView\n * if it doesn't already exist.\n *\n * @param def ComponentDef\n * @returns TView\n */\nfunction getOrCreateTComponentView(def) {\n    const tView = def.tView;\n    // Create a TView if there isn't one, or recreate it if the first create pass didn't\n    // complete successfuly since we can't know for sure whether it's in a usable shape.\n    if (tView === null || tView.incompleteFirstPass) {\n        return def.tView = createTView(1 /* Component */, -1, def.template, def.decls, def.vars, def.directiveDefs, def.pipeDefs, def.viewQuery, def.schemas, def.consts);\n    }\n    return tView;\n}\n/**\n * Creates a TView instance\n *\n * @param viewIndex The viewBlockId for inline views, or -1 if it's a component/dynamic\n * @param templateFn Template function\n * @param decls The number of nodes, local refs, and pipes in this template\n * @param directives Registry of directives for this view\n * @param pipes Registry of pipes for this view\n * @param viewQuery View queries for this view\n * @param schemas Schemas for this view\n * @param consts Constants for this view\n */\nfunction createTView(type, viewIndex, templateFn, decls, vars, directives, pipes, viewQuery, schemas, constsOrFactory) {\n    ngDevMode && ngDevMode.tView++;\n    const bindingStartIndex = HEADER_OFFSET + decls;\n    // This length does not yet contain host bindings from child directives because at this point,\n    // we don't know which directives are active on this template. As soon as a directive is matched\n    // that has a host binding, we will update the blueprint with that def's hostVars count.\n    const initialViewLength = bindingStartIndex + vars;\n    const blueprint = createViewBlueprint(bindingStartIndex, initialViewLength);\n    const consts = typeof constsOrFactory === 'function' ? constsOrFactory() : constsOrFactory;\n    const tView = blueprint[TVIEW] = ngDevMode ?\n        new TViewConstructor(type, viewIndex, // id: number,\n        blueprint, // blueprint: LView,\n        templateFn, // template: ComponentTemplate<{}>|null,\n        null, // queries: TQueries|null\n        viewQuery, // viewQuery: ViewQueriesFunction<{}>|null,\n        null, // node: TViewNode|TElementNode|null,\n        cloneToTViewData(blueprint).fill(null, bindingStartIndex), // data: TData,\n        bindingStartIndex, // bindingStartIndex: number,\n        initialViewLength, // expandoStartIndex: number,\n        null, // expandoInstructions: ExpandoInstructions|null,\n        true, // firstCreatePass: boolean,\n        true, // firstUpdatePass: boolean,\n        false, // staticViewQueries: boolean,\n        false, // staticContentQueries: boolean,\n        null, // preOrderHooks: HookData|null,\n        null, // preOrderCheckHooks: HookData|null,\n        null, // contentHooks: HookData|null,\n        null, // contentCheckHooks: HookData|null,\n        null, // viewHooks: HookData|null,\n        null, // viewCheckHooks: HookData|null,\n        null, // destroyHooks: DestroyHookData|null,\n        null, // cleanup: any[]|null,\n        null, // contentQueries: number[]|null,\n        null, // components: number[]|null,\n        typeof directives === 'function' ?\n            directives() :\n            directives, // directiveRegistry: DirectiveDefList|null,\n        typeof pipes === 'function' ? pipes() : pipes, // pipeRegistry: PipeDefList|null,\n        null, // firstChild: TNode|null,\n        schemas, // schemas: SchemaMetadata[]|null,\n        consts, // consts: TConstants|null\n        false, // incompleteFirstPass: boolean\n        decls, // ngDevMode only: decls\n        vars) :\n        {\n            type: type,\n            id: viewIndex,\n            blueprint: blueprint,\n            template: templateFn,\n            queries: null,\n            viewQuery: viewQuery,\n            node: null,\n            data: blueprint.slice().fill(null, bindingStartIndex),\n            bindingStartIndex: bindingStartIndex,\n            expandoStartIndex: initialViewLength,\n            expandoInstructions: null,\n            firstCreatePass: true,\n            firstUpdatePass: true,\n            staticViewQueries: false,\n            staticContentQueries: false,\n            preOrderHooks: null,\n            preOrderCheckHooks: null,\n            contentHooks: null,\n            contentCheckHooks: null,\n            viewHooks: null,\n            viewCheckHooks: null,\n            destroyHooks: null,\n            cleanup: null,\n            contentQueries: null,\n            components: null,\n            directiveRegistry: typeof directives === 'function' ? directives() : directives,\n            pipeRegistry: typeof pipes === 'function' ? pipes() : pipes,\n            firstChild: null,\n            schemas: schemas,\n            consts: consts,\n            incompleteFirstPass: false\n        };\n    if (ngDevMode) {\n        // For performance reasons it is important that the tView retains the same shape during runtime.\n        // (To make sure that all of the code is monomorphic.) For this reason we seal the object to\n        // prevent class transitions.\n        Object.seal(tView);\n    }\n    return tView;\n}\nfunction createViewBlueprint(bindingStartIndex, initialViewLength) {\n    const blueprint = ngDevMode ? new LViewBlueprint() : [];\n    for (let i = 0; i < initialViewLength; i++) {\n        blueprint.push(i < bindingStartIndex ? null : NO_CHANGE);\n    }\n    return blueprint;\n}\nfunction createError(text, token) {\n    return new Error(`Renderer: ${text} [${stringifyForError(token)}]`);\n}\nfunction assertHostNodeExists(rElement, elementOrSelector) {\n    if (!rElement) {\n        if (typeof elementOrSelector === 'string') {\n            throw createError('Host node with selector not found:', elementOrSelector);\n        }\n        else {\n            throw createError('Host node is required:', elementOrSelector);\n        }\n    }\n}\n/**\n * Locates the host native element, used for bootstrapping existing nodes into rendering pipeline.\n *\n * @param rendererFactory Factory function to create renderer instance.\n * @param elementOrSelector Render element or CSS selector to locate the element.\n * @param encapsulation View Encapsulation defined for component that requests host element.\n */\nfunction locateHostElement(renderer, elementOrSelector, encapsulation) {\n    if (isProceduralRenderer(renderer)) {\n        // When using native Shadow DOM, do not clear host element to allow native slot projection\n        const preserveContent = encapsulation === ViewEncapsulation$1.ShadowDom;\n        return renderer.selectRootElement(elementOrSelector, preserveContent);\n    }\n    let rElement = typeof elementOrSelector === 'string' ?\n        renderer.querySelector(elementOrSelector) :\n        elementOrSelector;\n    ngDevMode && assertHostNodeExists(rElement, elementOrSelector);\n    // Always clear host element's content when Renderer3 is in use. For procedural renderer case we\n    // make it depend on whether ShadowDom encapsulation is used (in which case the content should be\n    // preserved to allow native slot projection). ShadowDom encapsulation requires procedural\n    // renderer, and procedural renderer case is handled above.\n    rElement.textContent = '';\n    return rElement;\n}\n/**\n * Saves context for this cleanup function in LView.cleanupInstances.\n *\n * On the first template pass, saves in TView:\n * - Cleanup function\n * - Index of context we just saved in LView.cleanupInstances\n */\nfunction storeCleanupWithContext(tView, lView, context, cleanupFn) {\n    const lCleanup = getLCleanup(lView);\n    lCleanup.push(context);\n    if (tView.firstCreatePass) {\n        getTViewCleanup(tView).push(cleanupFn, lCleanup.length - 1);\n    }\n}\n/**\n * Constructs a TNode object from the arguments.\n *\n * @param tView `TView` to which this `TNode` belongs (used only in `ngDevMode`)\n * @param type The type of the node\n * @param adjustedIndex The index of the TNode in TView.data, adjusted for HEADER_OFFSET\n * @param tagName The tag name of the node\n * @param attrs The attributes defined on this node\n * @param tViews Any TViews attached to this node\n * @returns the TNode object\n */\nfunction createTNode(tView, tParent, type, adjustedIndex, tagName, attrs) {\n    ngDevMode && ngDevMode.tNode++;\n    let injectorIndex = tParent ? tParent.injectorIndex : -1;\n    const tNode = ngDevMode ?\n        new TNodeDebug(tView, // tView_: TView\n        type, // type: TNodeType\n        adjustedIndex, // index: number\n        injectorIndex, // injectorIndex: number\n        -1, // directiveStart: number\n        -1, // directiveEnd: number\n        -1, // directiveStylingLast: number\n        null, // propertyBindings: number[]|null\n        0, // flags: TNodeFlags\n        0, // providerIndexes: TNodeProviderIndexes\n        tagName, // tagName: string|null\n        attrs, // attrs: (string|AttributeMarker|(string|SelectorFlags)[])[]|null\n        null, // mergedAttrs\n        null, // localNames: (string|number)[]|null\n        undefined, // initialInputs: (string[]|null)[]|null|undefined\n        null, // inputs: PropertyAliases|null\n        null, // outputs: PropertyAliases|null\n        null, // tViews: ITView|ITView[]|null\n        null, // next: ITNode|null\n        null, // projectionNext: ITNode|null\n        null, // child: ITNode|null\n        tParent, // parent: TElementNode|TContainerNode|null\n        null, // projection: number|(ITNode|RNode[])[]|null\n        null, // styles: string|null\n        null, // stylesWithoutHost: string|null\n        undefined, // residualStyles: string|null\n        null, // classes: string|null\n        null, // classesWithoutHost: string|null\n        undefined, // residualClasses: string|null\n        0, // classBindings: TStylingRange;\n        0) :\n        {\n            type: type,\n            index: adjustedIndex,\n            injectorIndex: injectorIndex,\n            directiveStart: -1,\n            directiveEnd: -1,\n            directiveStylingLast: -1,\n            propertyBindings: null,\n            flags: 0,\n            providerIndexes: 0,\n            tagName: tagName,\n            attrs: attrs,\n            mergedAttrs: null,\n            localNames: null,\n            initialInputs: undefined,\n            inputs: null,\n            outputs: null,\n            tViews: null,\n            next: null,\n            projectionNext: null,\n            child: null,\n            parent: tParent,\n            projection: null,\n            styles: null,\n            stylesWithoutHost: null,\n            residualStyles: undefined,\n            classes: null,\n            classesWithoutHost: null,\n            residualClasses: undefined,\n            classBindings: 0,\n            styleBindings: 0,\n        };\n    if (ngDevMode) {\n        // For performance reasons it is important that the tNode retains the same shape during runtime.\n        // (To make sure that all of the code is monomorphic.) For this reason we seal the object to\n        // prevent class transitions.\n        Object.seal(tNode);\n    }\n    return tNode;\n}\nfunction generatePropertyAliases(inputAliasMap, directiveDefIdx, propStore) {\n    for (let publicName in inputAliasMap) {\n        if (inputAliasMap.hasOwnProperty(publicName)) {\n            propStore = propStore === null ? {} : propStore;\n            const internalName = inputAliasMap[publicName];\n            if (propStore.hasOwnProperty(publicName)) {\n                propStore[publicName].push(directiveDefIdx, internalName);\n            }\n            else {\n                (propStore[publicName] = [directiveDefIdx, internalName]);\n            }\n        }\n    }\n    return propStore;\n}\n/**\n * Initializes data structures required to work with directive outputs and outputs.\n * Initialization is done for all directives matched on a given TNode.\n */\nfunction initializeInputAndOutputAliases(tView, tNode) {\n    ngDevMode && assertFirstCreatePass(tView);\n    const start = tNode.directiveStart;\n    const end = tNode.directiveEnd;\n    const defs = tView.data;\n    const tNodeAttrs = tNode.attrs;\n    const inputsFromAttrs = ngDevMode ? new TNodeInitialInputs() : [];\n    let inputsStore = null;\n    let outputsStore = null;\n    for (let i = start; i < end; i++) {\n        const directiveDef = defs[i];\n        const directiveInputs = directiveDef.inputs;\n        // Do not use unbound attributes as inputs to structural directives, since structural\n        // directive inputs can only be set using microsyntax (e.g. `<div *dir=\"exp\">`).\n        // TODO(FW-1930): microsyntax expressions may also contain unbound/static attributes, which\n        // should be set for inline templates.\n        const initialInputs = (tNodeAttrs !== null && !isInlineTemplate(tNode)) ?\n            generateInitialInputs(directiveInputs, tNodeAttrs) :\n            null;\n        inputsFromAttrs.push(initialInputs);\n        inputsStore = generatePropertyAliases(directiveInputs, i, inputsStore);\n        outputsStore = generatePropertyAliases(directiveDef.outputs, i, outputsStore);\n    }\n    if (inputsStore !== null) {\n        if (inputsStore.hasOwnProperty('class')) {\n            tNode.flags |= 16 /* hasClassInput */;\n        }\n        if (inputsStore.hasOwnProperty('style')) {\n            tNode.flags |= 32 /* hasStyleInput */;\n        }\n    }\n    tNode.initialInputs = inputsFromAttrs;\n    tNode.inputs = inputsStore;\n    tNode.outputs = outputsStore;\n}\n/**\n * Mapping between attributes names that don't correspond to their element property names.\n *\n * Performance note: this function is written as a series of if checks (instead of, say, a property\n * object lookup) for performance reasons - the series of `if` checks seems to be the fastest way of\n * mapping property names. Do NOT change without benchmarking.\n *\n * Note: this mapping has to be kept in sync with the equally named mapping in the template\n * type-checking machinery of ngtsc.\n */\nfunction mapPropName(name) {\n    if (name === 'class')\n        return 'className';\n    if (name === 'for')\n        return 'htmlFor';\n    if (name === 'formaction')\n        return 'formAction';\n    if (name === 'innerHtml')\n        return 'innerHTML';\n    if (name === 'readonly')\n        return 'readOnly';\n    if (name === 'tabindex')\n        return 'tabIndex';\n    return name;\n}\nfunction elementPropertyInternal(tView, tNode, lView, propName, value, renderer, sanitizer, nativeOnly) {\n    ngDevMode && assertNotSame(value, NO_CHANGE, 'Incoming value should never be NO_CHANGE.');\n    const element = getNativeByTNode(tNode, lView);\n    let inputData = tNode.inputs;\n    let dataValue;\n    if (!nativeOnly && inputData != null && (dataValue = inputData[propName])) {\n        setInputsForProperty(tView, lView, dataValue, propName, value);\n        if (isComponentHost(tNode))\n            markDirtyIfOnPush(lView, tNode.index);\n        if (ngDevMode) {\n            setNgReflectProperties(lView, element, tNode.type, dataValue, value);\n        }\n    }\n    else if (tNode.type === 3 /* Element */) {\n        propName = mapPropName(propName);\n        if (ngDevMode) {\n            validateAgainstEventProperties(propName);\n            if (!validateProperty(tView, element, propName, tNode)) {\n                // Return here since we only log warnings for unknown properties.\n                logUnknownPropertyError(propName, tNode);\n                return;\n            }\n            ngDevMode.rendererSetProperty++;\n        }\n        // It is assumed that the sanitizer is only added when the compiler determines that the\n        // property is risky, so sanitization can be done without further checks.\n        value = sanitizer != null ? sanitizer(value, tNode.tagName || '', propName) : value;\n        if (isProceduralRenderer(renderer)) {\n            renderer.setProperty(element, propName, value);\n        }\n        else if (!isAnimationProp(propName)) {\n            element.setProperty ? element.setProperty(propName, value) :\n                element[propName] = value;\n        }\n    }\n    else if (tNode.type === 0 /* Container */ || tNode.type === 4 /* ElementContainer */) {\n        // If the node is a container and the property didn't\n        // match any of the inputs or schemas we should throw.\n        if (ngDevMode && !matchingSchemas(tView, tNode.tagName)) {\n            logUnknownPropertyError(propName, tNode);\n        }\n    }\n}\n/** If node is an OnPush component, marks its LView dirty. */\nfunction markDirtyIfOnPush(lView, viewIndex) {\n    ngDevMode && assertLView(lView);\n    const childComponentLView = getComponentLViewByIndex(viewIndex, lView);\n    if (!(childComponentLView[FLAGS] & 16 /* CheckAlways */)) {\n        childComponentLView[FLAGS] |= 64 /* Dirty */;\n    }\n}\nfunction setNgReflectProperty(lView, element, type, attrName, value) {\n    const renderer = lView[RENDERER];\n    attrName = normalizeDebugBindingName(attrName);\n    const debugValue = normalizeDebugBindingValue(value);\n    if (type === 3 /* Element */) {\n        if (value == null) {\n            isProceduralRenderer(renderer) ? renderer.removeAttribute(element, attrName) :\n                element.removeAttribute(attrName);\n        }\n        else {\n            isProceduralRenderer(renderer) ?\n                renderer.setAttribute(element, attrName, debugValue) :\n                element.setAttribute(attrName, debugValue);\n        }\n    }\n    else {\n        const textContent = `bindings=${JSON.stringify({ [attrName]: debugValue }, null, 2)}`;\n        if (isProceduralRenderer(renderer)) {\n            renderer.setValue(element, textContent);\n        }\n        else {\n            element.textContent = textContent;\n        }\n    }\n}\nfunction setNgReflectProperties(lView, element, type, dataValue, value) {\n    if (type === 3 /* Element */ || type === 0 /* Container */) {\n        /**\n         * dataValue is an array containing runtime input or output names for the directives:\n         * i+0: directive instance index\n         * i+1: privateName\n         *\n         * e.g. [0, 'change', 'change-minified']\n         * we want to set the reflected property with the privateName: dataValue[i+1]\n         */\n        for (let i = 0; i < dataValue.length; i += 2) {\n            setNgReflectProperty(lView, element, type, dataValue[i + 1], value);\n        }\n    }\n}\nfunction validateProperty(tView, element, propName, tNode) {\n    // If `schemas` is set to `null`, that's an indication that this Component was compiled in AOT\n    // mode where this check happens at compile time. In JIT mode, `schemas` is always present and\n    // defined as an array (as an empty array in case `schemas` field is not defined) and we should\n    // execute the check below.\n    if (tView.schemas === null)\n        return true;\n    // The property is considered valid if the element matches the schema, it exists on the element\n    // or it is synthetic, and we are in a browser context (web worker nodes should be skipped).\n    if (matchingSchemas(tView, tNode.tagName) || propName in element || isAnimationProp(propName)) {\n        return true;\n    }\n    // Note: `typeof Node` returns 'function' in most browsers, but on IE it is 'object' so we\n    // need to account for both here, while being careful for `typeof null` also returning 'object'.\n    return typeof Node === 'undefined' || Node === null || !(element instanceof Node);\n}\nfunction matchingSchemas(tView, tagName) {\n    const schemas = tView.schemas;\n    if (schemas !== null) {\n        for (let i = 0; i < schemas.length; i++) {\n            const schema = schemas[i];\n            if (schema === NO_ERRORS_SCHEMA ||\n                schema === CUSTOM_ELEMENTS_SCHEMA && tagName && tagName.indexOf('-') > -1) {\n                return true;\n            }\n        }\n    }\n    return false;\n}\n/**\n * Logs an error that a property is not supported on an element.\n * @param propName Name of the invalid property.\n * @param tNode Node on which we encountered the property.\n */\nfunction logUnknownPropertyError(propName, tNode) {\n    console.error(`Can't bind to '${propName}' since it isn't a known property of '${tNode.tagName}'.`);\n}\n/**\n * Instantiate a root component.\n */\nfunction instantiateRootComponent(tView, lView, def) {\n    const rootTNode = getPreviousOrParentTNode();\n    if (tView.firstCreatePass) {\n        if (def.providersResolver)\n            def.providersResolver(def);\n        generateExpandoInstructionBlock(tView, rootTNode, 1);\n        baseResolveDirective(tView, lView, def);\n    }\n    const directive = getNodeInjectable(lView, tView, lView.length - 1, rootTNode);\n    attachPatchData(directive, lView);\n    const native = getNativeByTNode(rootTNode, lView);\n    if (native) {\n        attachPatchData(native, lView);\n    }\n    return directive;\n}\n/**\n * Resolve the matched directives on a node.\n */\nfunction resolveDirectives(tView, lView, tNode, localRefs) {\n    // Please make sure to have explicit type for `exportsMap`. Inferred type triggers bug in\n    // tsickle.\n    ngDevMode && assertFirstCreatePass(tView);\n    let hasDirectives = false;\n    if (getBindingsEnabled()) {\n        const directiveDefs = findDirectiveDefMatches(tView, lView, tNode);\n        const exportsMap = localRefs === null ? null : { '': -1 };\n        if (directiveDefs !== null) {\n            let totalDirectiveHostVars = 0;\n            hasDirectives = true;\n            initTNodeFlags(tNode, tView.data.length, directiveDefs.length);\n            // When the same token is provided by several directives on the same node, some rules apply in\n            // the viewEngine:\n            // - viewProviders have priority over providers\n            // - the last directive in NgModule.declarations has priority over the previous one\n            // So to match these rules, the order in which providers are added in the arrays is very\n            // important.\n            for (let i = 0; i < directiveDefs.length; i++) {\n                const def = directiveDefs[i];\n                if (def.providersResolver)\n                    def.providersResolver(def);\n            }\n            generateExpandoInstructionBlock(tView, tNode, directiveDefs.length);\n            let preOrderHooksFound = false;\n            let preOrderCheckHooksFound = false;\n            for (let i = 0; i < directiveDefs.length; i++) {\n                const def = directiveDefs[i];\n                // Merge the attrs in the order of matches. This assumes that the first directive is the\n                // component itself, so that the component has the least priority.\n                tNode.mergedAttrs = mergeHostAttrs(tNode.mergedAttrs, def.hostAttrs);\n                baseResolveDirective(tView, lView, def);\n                saveNameToExportMap(tView.data.length - 1, def, exportsMap);\n                if (def.contentQueries !== null)\n                    tNode.flags |= 8 /* hasContentQuery */;\n                if (def.hostBindings !== null || def.hostAttrs !== null || def.hostVars !== 0)\n                    tNode.flags |= 128 /* hasHostBindings */;\n                const lifeCycleHooks = def.type.prototype;\n                // Only push a node index into the preOrderHooks array if this is the first\n                // pre-order hook found on this node.\n                if (!preOrderHooksFound &&\n                    (lifeCycleHooks.ngOnChanges || lifeCycleHooks.ngOnInit || lifeCycleHooks.ngDoCheck)) {\n                    // We will push the actual hook function into this array later during dir instantiation.\n                    // We cannot do it now because we must ensure hooks are registered in the same\n                    // order that directives are created (i.e. injection order).\n                    (tView.preOrderHooks || (tView.preOrderHooks = [])).push(tNode.index - HEADER_OFFSET);\n                    preOrderHooksFound = true;\n                }\n                if (!preOrderCheckHooksFound && (lifeCycleHooks.ngOnChanges || lifeCycleHooks.ngDoCheck)) {\n                    (tView.preOrderCheckHooks || (tView.preOrderCheckHooks = []))\n                        .push(tNode.index - HEADER_OFFSET);\n                    preOrderCheckHooksFound = true;\n                }\n                addHostBindingsToExpandoInstructions(tView, def);\n                totalDirectiveHostVars += def.hostVars;\n            }\n            initializeInputAndOutputAliases(tView, tNode);\n            growHostVarsSpace(tView, lView, totalDirectiveHostVars);\n        }\n        if (exportsMap)\n            cacheMatchingLocalNames(tNode, localRefs, exportsMap);\n    }\n    // Merge the template attrs last so that they have the highest priority.\n    tNode.mergedAttrs = mergeHostAttrs(tNode.mergedAttrs, tNode.attrs);\n    return hasDirectives;\n}\n/**\n * Add `hostBindings` to the `TView.expandoInstructions`.\n *\n * @param tView `TView` to which the `hostBindings` should be added.\n * @param def `ComponentDef`/`DirectiveDef`, which contains the `hostVars`/`hostBindings` to add.\n */\nfunction addHostBindingsToExpandoInstructions(tView, def) {\n    ngDevMode && assertFirstCreatePass(tView);\n    const expando = tView.expandoInstructions;\n    // TODO(misko): PERF we are adding `hostBindings` even if there is nothing to add! This is\n    // suboptimal for performance. `def.hostBindings` may be null,\n    // but we still need to push null to the array as a placeholder\n    // to ensure the directive counter is incremented (so host\n    // binding functions always line up with the corrective directive).\n    // This is suboptimal for performance. See `currentDirectiveIndex`\n    //  comment in `setHostBindingsByExecutingExpandoInstructions` for more\n    // details.  expando.push(def.hostBindings);\n    expando.push(def.hostBindings);\n    const hostVars = def.hostVars;\n    if (hostVars !== 0) {\n        expando.push(def.hostVars);\n    }\n}\n/**\n * Grow the `LView`, blueprint and `TView.data` to accommodate the `hostBindings`.\n *\n * To support locality we don't know ahead of time how many `hostVars` of the containing directives\n * we need to allocate. For this reason we allow growing these data structures as we discover more\n * directives to accommodate them.\n *\n * @param tView `TView` which needs to be grown.\n * @param lView `LView` which needs to be grown.\n * @param count Size by which we need to grow the data structures.\n */\nfunction growHostVarsSpace(tView, lView, count) {\n    ngDevMode && assertFirstCreatePass(tView);\n    ngDevMode && assertSame(tView, lView[TVIEW], '`LView` must be associated with `TView`!');\n    for (let i = 0; i < count; i++) {\n        lView.push(NO_CHANGE);\n        tView.blueprint.push(NO_CHANGE);\n        tView.data.push(null);\n    }\n}\n/**\n * Instantiate all the directives that were previously resolved on the current node.\n */\nfunction instantiateAllDirectives(tView, lView, tNode, native) {\n    const start = tNode.directiveStart;\n    const end = tNode.directiveEnd;\n    if (!tView.firstCreatePass) {\n        getOrCreateNodeInjectorForNode(tNode, lView);\n    }\n    attachPatchData(native, lView);\n    const initialInputs = tNode.initialInputs;\n    for (let i = start; i < end; i++) {\n        const def = tView.data[i];\n        const isComponent = isComponentDef(def);\n        if (isComponent) {\n            ngDevMode && assertNodeOfPossibleTypes(tNode, [3 /* Element */]);\n            addComponentLogic(lView, tNode, def);\n        }\n        const directive = getNodeInjectable(lView, tView, i, tNode);\n        attachPatchData(directive, lView);\n        if (initialInputs !== null) {\n            setInputsFromAttrs(lView, i - start, directive, def, tNode, initialInputs);\n        }\n        if (isComponent) {\n            const componentView = getComponentLViewByIndex(tNode.index, lView);\n            componentView[CONTEXT] = directive;\n        }\n    }\n}\nfunction invokeDirectivesHostBindings(tView, lView, tNode) {\n    const start = tNode.directiveStart;\n    const end = tNode.directiveEnd;\n    const expando = tView.expandoInstructions;\n    const firstCreatePass = tView.firstCreatePass;\n    const elementIndex = tNode.index - HEADER_OFFSET;\n    const currentDirectiveIndex = getCurrentDirectiveIndex();\n    try {\n        setSelectedIndex(elementIndex);\n        for (let dirIndex = start; dirIndex < end; dirIndex++) {\n            const def = tView.data[dirIndex];\n            const directive = lView[dirIndex];\n            setCurrentDirectiveIndex(dirIndex);\n            if (def.hostBindings !== null || def.hostVars !== 0 || def.hostAttrs !== null) {\n                invokeHostBindingsInCreationMode(def, directive);\n            }\n            else if (firstCreatePass) {\n                expando.push(null);\n            }\n        }\n    }\n    finally {\n        setSelectedIndex(-1);\n        setCurrentDirectiveIndex(currentDirectiveIndex);\n    }\n}\n/**\n * Invoke the host bindings in creation mode.\n *\n * @param def `DirectiveDef` which may contain the `hostBindings` function.\n * @param directive Instance of directive.\n */\nfunction invokeHostBindingsInCreationMode(def, directive) {\n    if (def.hostBindings !== null) {\n        def.hostBindings(1 /* Create */, directive);\n    }\n}\n/**\n * Generates a new block in TView.expandoInstructions for this node.\n *\n * Each expando block starts with the element index (turned negative so we can distinguish\n * it from the hostVar count) and the directive count. See more in VIEW_DATA.md.\n */\nfunction generateExpandoInstructionBlock(tView, tNode, directiveCount) {\n    ngDevMode &&\n        assertEqual(tView.firstCreatePass, true, 'Expando block should only be generated on first create pass.');\n    // Important: In JS `-x` and `0-x` is not the same! If `x===0` then `-x` will produce `-0` which\n    // requires non standard math arithmetic and it can prevent VM optimizations.\n    // `0-0` will always produce `0` and will not cause a potential deoptimization in VM.\n    const elementIndex = HEADER_OFFSET - tNode.index;\n    const providerStartIndex = tNode.providerIndexes & 1048575 /* ProvidersStartIndexMask */;\n    const providerCount = tView.data.length - providerStartIndex;\n    (tView.expandoInstructions || (tView.expandoInstructions = []))\n        .push(elementIndex, providerCount, directiveCount);\n}\n/**\n * Matches the current node against all available selectors.\n * If a component is matched (at most one), it is returned in first position in the array.\n */\nfunction findDirectiveDefMatches(tView, viewData, tNode) {\n    ngDevMode && assertFirstCreatePass(tView);\n    ngDevMode &&\n        assertNodeOfPossibleTypes(tNode, [3 /* Element */, 4 /* ElementContainer */, 0 /* Container */]);\n    const registry = tView.directiveRegistry;\n    let matches = null;\n    if (registry) {\n        for (let i = 0; i < registry.length; i++) {\n            const def = registry[i];\n            if (isNodeMatchingSelectorList(tNode, def.selectors, /* isProjectionMode */ false)) {\n                matches || (matches = ngDevMode ? new MatchesArray() : []);\n                diPublicInInjector(getOrCreateNodeInjectorForNode(tNode, viewData), tView, def.type);\n                if (isComponentDef(def)) {\n                    if (ngDevMode) {\n                        assertNodeOfPossibleTypes(tNode, [3 /* Element */], `\"${tNode.tagName}\" tags cannot be used as component hosts. ` +\n                            `Please use a different tag to activate the ${stringify(def.type)} component.`);\n                        if (tNode.flags & 2 /* isComponentHost */)\n                            throwMultipleComponentError(tNode);\n                    }\n                    markAsComponentHost(tView, tNode);\n                    // The component is always stored first with directives after.\n                    matches.unshift(def);\n                }\n                else {\n                    matches.push(def);\n                }\n            }\n        }\n    }\n    return matches;\n}\n/**\n * Marks a given TNode as a component's host. This consists of:\n * - setting appropriate TNode flags;\n * - storing index of component's host element so it will be queued for view refresh during CD.\n */\nfunction markAsComponentHost(tView, hostTNode) {\n    ngDevMode && assertFirstCreatePass(tView);\n    hostTNode.flags |= 2 /* isComponentHost */;\n    (tView.components || (tView.components = ngDevMode ? new TViewComponents() : []))\n        .push(hostTNode.index);\n}\n/** Caches local names and their matching directive indices for query and template lookups. */\nfunction cacheMatchingLocalNames(tNode, localRefs, exportsMap) {\n    if (localRefs) {\n        const localNames = tNode.localNames = ngDevMode ? new TNodeLocalNames() : [];\n        // Local names must be stored in tNode in the same order that localRefs are defined\n        // in the template to ensure the data is loaded in the same slots as their refs\n        // in the template (for template queries).\n        for (let i = 0; i < localRefs.length; i += 2) {\n            const index = exportsMap[localRefs[i + 1]];\n            if (index == null)\n                throw new Error(`Export of name '${localRefs[i + 1]}' not found!`);\n            localNames.push(localRefs[i], index);\n        }\n    }\n}\n/**\n * Builds up an export map as directives are created, so local refs can be quickly mapped\n * to their directive instances.\n */\nfunction saveNameToExportMap(index, def, exportsMap) {\n    if (exportsMap) {\n        if (def.exportAs) {\n            for (let i = 0; i < def.exportAs.length; i++) {\n                exportsMap[def.exportAs[i]] = index;\n            }\n        }\n        if (isComponentDef(def))\n            exportsMap[''] = index;\n    }\n}\n/**\n * Initializes the flags on the current node, setting all indices to the initial index,\n * the directive count to 0, and adding the isComponent flag.\n * @param index the initial index\n */\nfunction initTNodeFlags(tNode, index, numberOfDirectives) {\n    ngDevMode &&\n        assertNotEqual(numberOfDirectives, tNode.directiveEnd - tNode.directiveStart, 'Reached the max number of directives');\n    tNode.flags |= 1 /* isDirectiveHost */;\n    // When the first directive is created on a node, save the index\n    tNode.directiveStart = index;\n    tNode.directiveEnd = index + numberOfDirectives;\n    tNode.providerIndexes = index;\n}\nfunction baseResolveDirective(tView, viewData, def) {\n    tView.data.push(def);\n    const directiveFactory = def.factory || (def.factory = getFactoryDef(def.type, true));\n    const nodeInjectorFactory = new NodeInjectorFactory(directiveFactory, isComponentDef(def), null);\n    tView.blueprint.push(nodeInjectorFactory);\n    viewData.push(nodeInjectorFactory);\n}\nfunction addComponentLogic(lView, hostTNode, def) {\n    const native = getNativeByTNode(hostTNode, lView);\n    const tView = getOrCreateTComponentView(def);\n    // Only component views should be added to the view tree directly. Embedded views are\n    // accessed through their containers because they may be removed / re-added later.\n    const rendererFactory = lView[RENDERER_FACTORY];\n    const componentView = addToViewTree(lView, createLView(lView, tView, null, def.onPush ? 64 /* Dirty */ : 16 /* CheckAlways */, native, hostTNode, rendererFactory, rendererFactory.createRenderer(native, def)));\n    // Component view will always be created before any injected LContainers,\n    // so this is a regular element, wrap it with the component view\n    lView[hostTNode.index] = componentView;\n}\nfunction elementAttributeInternal(tNode, lView, name, value, sanitizer, namespace) {\n    if (ngDevMode) {\n        assertNotSame(value, NO_CHANGE, 'Incoming value should never be NO_CHANGE.');\n        validateAgainstEventAttributes(name);\n        assertNodeNotOfTypes(tNode, [0 /* Container */, 4 /* ElementContainer */], `Attempted to set attribute \\`${name}\\` on a container node. ` +\n            `Host bindings are not valid on ng-container or ng-template.`);\n    }\n    const element = getNativeByTNode(tNode, lView);\n    const renderer = lView[RENDERER];\n    if (value == null) {\n        ngDevMode && ngDevMode.rendererRemoveAttribute++;\n        isProceduralRenderer(renderer) ? renderer.removeAttribute(element, name, namespace) :\n            element.removeAttribute(name);\n    }\n    else {\n        ngDevMode && ngDevMode.rendererSetAttribute++;\n        const strValue = sanitizer == null ? renderStringify(value) : sanitizer(value, tNode.tagName || '', name);\n        if (isProceduralRenderer(renderer)) {\n            renderer.setAttribute(element, name, strValue, namespace);\n        }\n        else {\n            namespace ? element.setAttributeNS(namespace, name, strValue) :\n                element.setAttribute(name, strValue);\n        }\n    }\n}\n/**\n * Sets initial input properties on directive instances from attribute data\n *\n * @param lView Current LView that is being processed.\n * @param directiveIndex Index of the directive in directives array\n * @param instance Instance of the directive on which to set the initial inputs\n * @param def The directive def that contains the list of inputs\n * @param tNode The static data for this node\n */\nfunction setInputsFromAttrs(lView, directiveIndex, instance, def, tNode, initialInputData) {\n    const initialInputs = initialInputData[directiveIndex];\n    if (initialInputs !== null) {\n        const setInput = def.setInput;\n        for (let i = 0; i < initialInputs.length;) {\n            const publicName = initialInputs[i++];\n            const privateName = initialInputs[i++];\n            const value = initialInputs[i++];\n            if (setInput !== null) {\n                def.setInput(instance, value, publicName, privateName);\n            }\n            else {\n                instance[privateName] = value;\n            }\n            if (ngDevMode) {\n                const nativeElement = getNativeByTNode(tNode, lView);\n                setNgReflectProperty(lView, nativeElement, tNode.type, privateName, value);\n            }\n        }\n    }\n}\n/**\n * Generates initialInputData for a node and stores it in the template's static storage\n * so subsequent template invocations don't have to recalculate it.\n *\n * initialInputData is an array containing values that need to be set as input properties\n * for directives on this node, but only once on creation. We need this array to support\n * the case where you set an @Input property of a directive using attribute-like syntax.\n * e.g. if you have a `name` @Input, you can set it once like this:\n *\n * <my-component name=\"Bess\"></my-component>\n *\n * @param inputs The list of inputs from the directive def\n * @param attrs The static attrs on this node\n */\nfunction generateInitialInputs(inputs, attrs) {\n    let inputsToStore = null;\n    let i = 0;\n    while (i < attrs.length) {\n        const attrName = attrs[i];\n        if (attrName === 0 /* NamespaceURI */) {\n            // We do not allow inputs on namespaced attributes.\n            i += 4;\n            continue;\n        }\n        else if (attrName === 5 /* ProjectAs */) {\n            // Skip over the `ngProjectAs` value.\n            i += 2;\n            continue;\n        }\n        // If we hit any other attribute markers, we're done anyway. None of those are valid inputs.\n        if (typeof attrName === 'number')\n            break;\n        if (inputs.hasOwnProperty(attrName)) {\n            if (inputsToStore === null)\n                inputsToStore = [];\n            inputsToStore.push(attrName, inputs[attrName], attrs[i + 1]);\n        }\n        i += 2;\n    }\n    return inputsToStore;\n}\n//////////////////////////\n//// ViewContainer & View\n//////////////////////////\n// Not sure why I need to do `any` here but TS complains later.\nconst LContainerArray = ((typeof ngDevMode === 'undefined' || ngDevMode) && initNgDevMode()) &&\n    createNamedArrayType('LContainer');\n/**\n * Creates a LContainer, either from a container instruction, or for a ViewContainerRef.\n *\n * @param hostNative The host element for the LContainer\n * @param hostTNode The host TNode for the LContainer\n * @param currentView The parent view of the LContainer\n * @param native The native comment element\n * @param isForViewContainerRef Optional a flag indicating the ViewContainerRef case\n * @returns LContainer\n */\nfunction createLContainer(hostNative, currentView, native, tNode) {\n    ngDevMode && assertLView(currentView);\n    ngDevMode && !isProceduralRenderer(currentView[RENDERER]) && assertDomNode(native);\n    // https://jsperf.com/array-literal-vs-new-array-really\n    const lContainer = new (ngDevMode ? LContainerArray : Array)(hostNative, // host native\n    true, // Boolean `true` in this position signifies that this is an `LContainer`\n    false, // has transplanted views\n    currentView, // parent\n    null, // next\n    0, // transplanted views to refresh count\n    tNode, // t_host\n    native, // native,\n    null, // view refs\n    null);\n    ngDevMode &&\n        assertEqual(lContainer.length, CONTAINER_HEADER_OFFSET, 'Should allocate correct number of slots for LContainer header.');\n    ngDevMode && attachLContainerDebug(lContainer);\n    return lContainer;\n}\n/**\n * Goes over embedded views (ones created through ViewContainerRef APIs) and refreshes\n * them by executing an associated template function.\n */\nfunction refreshEmbeddedViews(lView) {\n    for (let lContainer = getFirstLContainer(lView); lContainer !== null; lContainer = getNextLContainer(lContainer)) {\n        for (let i = CONTAINER_HEADER_OFFSET; i < lContainer.length; i++) {\n            const embeddedLView = lContainer[i];\n            const embeddedTView = embeddedLView[TVIEW];\n            ngDevMode && assertDefined(embeddedTView, 'TView must be allocated');\n            if (viewAttachedToChangeDetector(embeddedLView)) {\n                refreshView(embeddedTView, embeddedLView, embeddedTView.template, embeddedLView[CONTEXT]);\n            }\n        }\n    }\n}\n/**\n * Mark transplanted views as needing to be refreshed at their insertion points.\n *\n * @param lView The `LView` that may have transplanted views.\n */\nfunction markTransplantedViewsForRefresh(lView) {\n    for (let lContainer = getFirstLContainer(lView); lContainer !== null; lContainer = getNextLContainer(lContainer)) {\n        if (!lContainer[HAS_TRANSPLANTED_VIEWS])\n            continue;\n        const movedViews = lContainer[MOVED_VIEWS];\n        ngDevMode && assertDefined(movedViews, 'Transplanted View flags set but missing MOVED_VIEWS');\n        for (let i = 0; i < movedViews.length; i++) {\n            const movedLView = movedViews[i];\n            const insertionLContainer = movedLView[PARENT];\n            ngDevMode && assertLContainer(insertionLContainer);\n            // We don't want to increment the counter if the moved LView was already marked for\n            // refresh.\n            if ((movedLView[FLAGS] & 1024 /* RefreshTransplantedView */) === 0) {\n                updateTransplantedViewCount(insertionLContainer, 1);\n            }\n            // Note, it is possible that the `movedViews` is tracking views that are transplanted *and*\n            // those that aren't (declaration component === insertion component). In the latter case,\n            // it's fine to add the flag, as we will clear it immediately in\n            // `refreshEmbeddedViews` for the view currently being refreshed.\n            movedLView[FLAGS] |= 1024 /* RefreshTransplantedView */;\n        }\n    }\n}\n/////////////\n/**\n * Refreshes components by entering the component view and processing its bindings, queries, etc.\n *\n * @param componentHostIdx  Element index in LView[] (adjusted for HEADER_OFFSET)\n */\nfunction refreshComponent(hostLView, componentHostIdx) {\n    ngDevMode && assertEqual(isCreationMode(hostLView), false, 'Should be run in update mode');\n    const componentView = getComponentLViewByIndex(componentHostIdx, hostLView);\n    // Only attached components that are CheckAlways or OnPush and dirty should be refreshed\n    if (viewAttachedToChangeDetector(componentView)) {\n        const tView = componentView[TVIEW];\n        if (componentView[FLAGS] & (16 /* CheckAlways */ | 64 /* Dirty */)) {\n            refreshView(tView, componentView, tView.template, componentView[CONTEXT]);\n        }\n        else if (componentView[TRANSPLANTED_VIEWS_TO_REFRESH] > 0) {\n            // Only attached components that are CheckAlways or OnPush and dirty should be refreshed\n            refreshContainsDirtyView(componentView);\n        }\n    }\n}\n/**\n * Refreshes all transplanted views marked with `LViewFlags.RefreshTransplantedView` that are\n * children or descendants of the given lView.\n *\n * @param lView The lView which contains descendant transplanted views that need to be refreshed.\n */\nfunction refreshContainsDirtyView(lView) {\n    for (let lContainer = getFirstLContainer(lView); lContainer !== null; lContainer = getNextLContainer(lContainer)) {\n        for (let i = CONTAINER_HEADER_OFFSET; i < lContainer.length; i++) {\n            const embeddedLView = lContainer[i];\n            if (embeddedLView[FLAGS] & 1024 /* RefreshTransplantedView */) {\n                const embeddedTView = embeddedLView[TVIEW];\n                ngDevMode && assertDefined(embeddedTView, 'TView must be allocated');\n                refreshView(embeddedTView, embeddedLView, embeddedTView.template, embeddedLView[CONTEXT]);\n            }\n            else if (embeddedLView[TRANSPLANTED_VIEWS_TO_REFRESH] > 0) {\n                refreshContainsDirtyView(embeddedLView);\n            }\n        }\n    }\n    const tView = lView[TVIEW];\n    // Refresh child component views.\n    const components = tView.components;\n    if (components !== null) {\n        for (let i = 0; i < components.length; i++) {\n            const componentView = getComponentLViewByIndex(components[i], lView);\n            // Only attached components that are CheckAlways or OnPush and dirty should be refreshed\n            if (viewAttachedToChangeDetector(componentView) &&\n                componentView[TRANSPLANTED_VIEWS_TO_REFRESH] > 0) {\n                refreshContainsDirtyView(componentView);\n            }\n        }\n    }\n}\nfunction renderComponent(hostLView, componentHostIdx) {\n    ngDevMode && assertEqual(isCreationMode(hostLView), true, 'Should be run in creation mode');\n    const componentView = getComponentLViewByIndex(componentHostIdx, hostLView);\n    const componentTView = componentView[TVIEW];\n    syncViewWithBlueprint(componentTView, componentView);\n    renderView(componentTView, componentView, componentView[CONTEXT]);\n}\n/**\n * Syncs an LView instance with its blueprint if they have gotten out of sync.\n *\n * Typically, blueprints and their view instances should always be in sync, so the loop here\n * will be skipped. However, consider this case of two components side-by-side:\n *\n * App template:\n * ```\n * <comp></comp>\n * <comp></comp>\n * ```\n *\n * The following will happen:\n * 1. App template begins processing.\n * 2. First <comp> is matched as a component and its LView is created.\n * 3. Second <comp> is matched as a component and its LView is created.\n * 4. App template completes processing, so it's time to check child templates.\n * 5. First <comp> template is checked. It has a directive, so its def is pushed to blueprint.\n * 6. Second <comp> template is checked. Its blueprint has been updated by the first\n * <comp> template, but its LView was created before this update, so it is out of sync.\n *\n * Note that embedded views inside ngFor loops will never be out of sync because these views\n * are processed as soon as they are created.\n *\n * @param tView The `TView` that contains the blueprint for syncing\n * @param lView The view to sync\n */\nfunction syncViewWithBlueprint(tView, lView) {\n    for (let i = lView.length; i < tView.blueprint.length; i++) {\n        lView.push(tView.blueprint[i]);\n    }\n}\n/**\n * Adds LView or LContainer to the end of the current view tree.\n *\n * This structure will be used to traverse through nested views to remove listeners\n * and call onDestroy callbacks.\n *\n * @param lView The view where LView or LContainer should be added\n * @param adjustedHostIndex Index of the view's host node in LView[], adjusted for header\n * @param lViewOrLContainer The LView or LContainer to add to the view tree\n * @returns The state passed in\n */\nfunction addToViewTree(lView, lViewOrLContainer) {\n    // TODO(benlesh/misko): This implementation is incorrect, because it always adds the LContainer\n    // to the end of the queue, which means if the developer retrieves the LContainers from RNodes out\n    // of order, the change detection will run out of order, as the act of retrieving the the\n    // LContainer from the RNode is what adds it to the queue.\n    if (lView[CHILD_HEAD]) {\n        lView[CHILD_TAIL][NEXT] = lViewOrLContainer;\n    }\n    else {\n        lView[CHILD_HEAD] = lViewOrLContainer;\n    }\n    lView[CHILD_TAIL] = lViewOrLContainer;\n    return lViewOrLContainer;\n}\n///////////////////////////////\n//// Change detection\n///////////////////////////////\n/**\n * Marks current view and all ancestors dirty.\n *\n * Returns the root view because it is found as a byproduct of marking the view tree\n * dirty, and can be used by methods that consume markViewDirty() to easily schedule\n * change detection. Otherwise, such methods would need to traverse up the view tree\n * an additional time to get the root view and schedule a tick on it.\n *\n * @param lView The starting LView to mark dirty\n * @returns the root LView\n */\nfunction markViewDirty(lView) {\n    while (lView) {\n        lView[FLAGS] |= 64 /* Dirty */;\n        const parent = getLViewParent(lView);\n        // Stop traversing up as soon as you find a root view that wasn't attached to any container\n        if (isRootView(lView) && !parent) {\n            return lView;\n        }\n        // continue otherwise\n        lView = parent;\n    }\n    return null;\n}\n/**\n * Used to schedule change detection on the whole application.\n *\n * Unlike `tick`, `scheduleTick` coalesces multiple calls into one change detection run.\n * It is usually called indirectly by calling `markDirty` when the view needs to be\n * re-rendered.\n *\n * Typically `scheduleTick` uses `requestAnimationFrame` to coalesce multiple\n * `scheduleTick` requests. The scheduling function can be overridden in\n * `renderComponent`'s `scheduler` option.\n */\nfunction scheduleTick(rootContext, flags) {\n    const nothingScheduled = rootContext.flags === 0 /* Empty */;\n    rootContext.flags |= flags;\n    if (nothingScheduled && rootContext.clean == _CLEAN_PROMISE) {\n        let res;\n        rootContext.clean = new Promise((r) => res = r);\n        rootContext.scheduler(() => {\n            if (rootContext.flags & 1 /* DetectChanges */) {\n                rootContext.flags &= ~1 /* DetectChanges */;\n                tickRootContext(rootContext);\n            }\n            if (rootContext.flags & 2 /* FlushPlayers */) {\n                rootContext.flags &= ~2 /* FlushPlayers */;\n                const playerHandler = rootContext.playerHandler;\n                if (playerHandler) {\n                    playerHandler.flushPlayers();\n                }\n            }\n            rootContext.clean = _CLEAN_PROMISE;\n            res(null);\n        });\n    }\n}\nfunction tickRootContext(rootContext) {\n    for (let i = 0; i < rootContext.components.length; i++) {\n        const rootComponent = rootContext.components[i];\n        const lView = readPatchedLView(rootComponent);\n        const tView = lView[TVIEW];\n        renderComponentOrTemplate(tView, lView, tView.template, rootComponent);\n    }\n}\nfunction detectChangesInternal(tView, lView, context) {\n    const rendererFactory = lView[RENDERER_FACTORY];\n    if (rendererFactory.begin)\n        rendererFactory.begin();\n    try {\n        refreshView(tView, lView, tView.template, context);\n    }\n    catch (error) {\n        handleError(lView, error);\n        throw error;\n    }\n    finally {\n        if (rendererFactory.end)\n            rendererFactory.end();\n    }\n}\n/**\n * Synchronously perform change detection on a root view and its components.\n *\n * @param lView The view which the change detection should be performed on.\n */\nfunction detectChangesInRootView(lView) {\n    tickRootContext(lView[CONTEXT]);\n}\nfunction checkNoChangesInternal(tView, view, context) {\n    setCheckNoChangesMode(true);\n    try {\n        detectChangesInternal(tView, view, context);\n    }\n    finally {\n        setCheckNoChangesMode(false);\n    }\n}\n/**\n * Checks the change detector on a root view and its components, and throws if any changes are\n * detected.\n *\n * This is used in development mode to verify that running change detection doesn't\n * introduce other changes.\n *\n * @param lView The view which the change detection should be checked on.\n */\nfunction checkNoChangesInRootView(lView) {\n    setCheckNoChangesMode(true);\n    try {\n        detectChangesInRootView(lView);\n    }\n    finally {\n        setCheckNoChangesMode(false);\n    }\n}\nfunction executeViewQueryFn(flags, viewQueryFn, component) {\n    ngDevMode && assertDefined(viewQueryFn, 'View queries function to execute must be defined.');\n    setCurrentQueryIndex(0);\n    viewQueryFn(flags, component);\n}\n///////////////////////////////\n//// Bindings & interpolations\n///////////////////////////////\n/**\n * Stores meta-data for a property binding to be used by TestBed's `DebugElement.properties`.\n *\n * In order to support TestBed's `DebugElement.properties` we need to save, for each binding:\n * - a bound property name;\n * - a static parts of interpolated strings;\n *\n * A given property metadata is saved at the binding's index in the `TView.data` (in other words, a\n * property binding metadata will be stored in `TView.data` at the same index as a bound value in\n * `LView`). Metadata are represented as `INTERPOLATION_DELIMITER`-delimited string with the\n * following format:\n * - `propertyName` for bound properties;\n * - `propertyName�prefix�interpolation_static_part1�..interpolation_static_partN�suffix` for\n * interpolated properties.\n *\n * @param tData `TData` where meta-data will be saved;\n * @param tNode `TNode` that is a target of the binding;\n * @param propertyName bound property name;\n * @param bindingIndex binding index in `LView`\n * @param interpolationParts static interpolation parts (for property interpolations)\n */\nfunction storePropertyBindingMetadata(tData, tNode, propertyName, bindingIndex, ...interpolationParts) {\n    // Binding meta-data are stored only the first time a given property instruction is processed.\n    // Since we don't have a concept of the \"first update pass\" we need to check for presence of the\n    // binding meta-data to decide if one should be stored (or if was stored already).\n    if (tData[bindingIndex] === null) {\n        if (tNode.inputs == null || !tNode.inputs[propertyName]) {\n            const propBindingIdxs = tNode.propertyBindings || (tNode.propertyBindings = []);\n            propBindingIdxs.push(bindingIndex);\n            let bindingMetadata = propertyName;\n            if (interpolationParts.length > 0) {\n                bindingMetadata +=\n                    INTERPOLATION_DELIMITER + interpolationParts.join(INTERPOLATION_DELIMITER);\n            }\n            tData[bindingIndex] = bindingMetadata;\n        }\n    }\n}\nconst CLEAN_PROMISE = _CLEAN_PROMISE;\nfunction getLCleanup(view) {\n    // top level variables should not be exported for performance reasons (PERF_NOTES.md)\n    return view[CLEANUP] || (view[CLEANUP] = ngDevMode ? new LCleanup() : []);\n}\nfunction getTViewCleanup(tView) {\n    return tView.cleanup || (tView.cleanup = ngDevMode ? new TCleanup() : []);\n}\n/**\n * There are cases where the sub component's renderer needs to be included\n * instead of the current renderer (see the componentSyntheticHost* instructions).\n */\nfunction loadComponentRenderer(currentDef, tNode, lView) {\n    // TODO(FW-2043): the `currentDef` is null when host bindings are invoked while creating root\n    // component (see packages/core/src/render3/component.ts). This is not consistent with the process\n    // of creating inner components, when current directive index is available in the state. In order\n    // to avoid relying on current def being `null` (thus special-casing root component creation), the\n    // process of creating root component should be unified with the process of creating inner\n    // components.\n    if (currentDef === null || isComponentDef(currentDef)) {\n        lView = unwrapLView(lView[tNode.index]);\n    }\n    return lView[RENDERER];\n}\n/** Handles an error thrown in an LView. */\nfunction handleError(lView, error) {\n    const injector = lView[INJECTOR$1];\n    const errorHandler = injector ? injector.get(ErrorHandler, null) : null;\n    errorHandler && errorHandler.handleError(error);\n}\n/**\n * Set the inputs of directives at the current node to corresponding value.\n *\n * @param tView The current TView\n * @param lView the `LView` which contains the directives.\n * @param inputs mapping between the public \"input\" name and privately-known,\n *        possibly minified, property names to write to.\n * @param value Value to set.\n */\nfunction setInputsForProperty(tView, lView, inputs, publicName, value) {\n    for (let i = 0; i < inputs.length;) {\n        const index = inputs[i++];\n        const privateName = inputs[i++];\n        const instance = lView[index];\n        ngDevMode && assertIndexInRange(lView, index);\n        const def = tView.data[index];\n        if (def.setInput !== null) {\n            def.setInput(instance, value, publicName, privateName);\n        }\n        else {\n            instance[privateName] = value;\n        }\n    }\n}\n/**\n * Updates a text binding at a given index in a given LView.\n */\nfunction textBindingInternal(lView, index, value) {\n    ngDevMode && assertNotSame(value, NO_CHANGE, 'value should not be NO_CHANGE');\n    ngDevMode && assertIndexInRange(lView, index + HEADER_OFFSET);\n    const element = getNativeByIndex(index, lView);\n    ngDevMode && assertDefined(element, 'native element should exist');\n    ngDevMode && ngDevMode.rendererSetText++;\n    const renderer = lView[RENDERER];\n    isProceduralRenderer(renderer) ? renderer.setValue(element, value) : element.textContent = value;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst unusedValueToPlacateAjd$1 = unusedValueExportToPlacateAjd$1 + unusedValueExportToPlacateAjd$4 + unusedValueExportToPlacateAjd$5 + unusedValueExportToPlacateAjd$2 + unusedValueExportToPlacateAjd;\nfunction getLContainer(tNode, embeddedView) {\n    ngDevMode && assertLView(embeddedView);\n    const container = embeddedView[PARENT];\n    if (tNode.index === -1) {\n        // This is a dynamically created view inside a dynamic container.\n        // The parent isn't an LContainer if the embedded view hasn't been attached yet.\n        return isLContainer(container) ? container : null;\n    }\n    else {\n        ngDevMode && assertLContainer(container);\n        // This is a inline view node (e.g. embeddedViewStart)\n        return container;\n    }\n}\n/**\n * Retrieves render parent for a given view.\n * Might be null if a view is not yet attached to any container.\n */\nfunction getContainerRenderParent(tViewNode, view) {\n    const container = getLContainer(tViewNode, view);\n    return container ? nativeParentNode(view[RENDERER], container[NATIVE]) : null;\n}\n/**\n * NOTE: for performance reasons, the possible actions are inlined within the function instead of\n * being passed as an argument.\n */\nfunction applyToElementOrContainer(action, renderer, parent, lNodeToHandle, beforeNode) {\n    // If this slot was allocated for a text node dynamically created by i18n, the text node itself\n    // won't be created until i18nApply() in the update block, so this node should be skipped.\n    // For more info, see \"ICU expressions should work inside an ngTemplateOutlet inside an ngFor\"\n    // in `i18n_spec.ts`.\n    if (lNodeToHandle != null) {\n        let lContainer;\n        let isComponent = false;\n        // We are expecting an RNode, but in the case of a component or LContainer the `RNode` is\n        // wrapped in an array which needs to be unwrapped. We need to know if it is a component and if\n        // it has LContainer so that we can process all of those cases appropriately.\n        if (isLContainer(lNodeToHandle)) {\n            lContainer = lNodeToHandle;\n        }\n        else if (isLView(lNodeToHandle)) {\n            isComponent = true;\n            ngDevMode && assertDefined(lNodeToHandle[HOST], 'HOST must be defined for a component LView');\n            lNodeToHandle = lNodeToHandle[HOST];\n        }\n        const rNode = unwrapRNode(lNodeToHandle);\n        ngDevMode && !isProceduralRenderer(renderer) && assertDomNode(rNode);\n        if (action === 0 /* Create */ && parent !== null) {\n            if (beforeNode == null) {\n                nativeAppendChild(renderer, parent, rNode);\n            }\n            else {\n                nativeInsertBefore(renderer, parent, rNode, beforeNode || null);\n            }\n        }\n        else if (action === 1 /* Insert */ && parent !== null) {\n            nativeInsertBefore(renderer, parent, rNode, beforeNode || null);\n        }\n        else if (action === 2 /* Detach */) {\n            nativeRemoveNode(renderer, rNode, isComponent);\n        }\n        else if (action === 3 /* Destroy */) {\n            ngDevMode && ngDevMode.rendererDestroyNode++;\n            renderer.destroyNode(rNode);\n        }\n        if (lContainer != null) {\n            applyContainer(renderer, action, lContainer, parent, beforeNode);\n        }\n    }\n}\nfunction createTextNode(value, renderer) {\n    ngDevMode && ngDevMode.rendererCreateTextNode++;\n    ngDevMode && ngDevMode.rendererSetText++;\n    return isProceduralRenderer(renderer) ? renderer.createText(value) :\n        renderer.createTextNode(value);\n}\nfunction addRemoveViewFromContainer(tView, lView, insertMode, beforeNode) {\n    const renderParent = getContainerRenderParent(tView.node, lView);\n    ngDevMode && assertNodeType(tView.node, 2 /* View */);\n    if (renderParent) {\n        const renderer = lView[RENDERER];\n        const action = insertMode ? 1 /* Insert */ : 2 /* Detach */;\n        applyView(tView, lView, renderer, action, renderParent, beforeNode);\n    }\n}\n/**\n * Detach a `LView` from the DOM by detaching its nodes.\n *\n * @param tView The `TView' of the `LView` to be detached\n * @param lView the `LView` to be detached.\n */\nfunction renderDetachView(tView, lView) {\n    applyView(tView, lView, lView[RENDERER], 2 /* Detach */, null, null);\n}\n/**\n * Traverses down and up the tree of views and containers to remove listeners and\n * call onDestroy callbacks.\n *\n * Notes:\n *  - Because it's used for onDestroy calls, it needs to be bottom-up.\n *  - Must process containers instead of their views to avoid splicing\n *  when views are destroyed and re-added.\n *  - Using a while loop because it's faster than recursion\n *  - Destroy only called on movement to sibling or movement to parent (laterally or up)\n *\n *  @param rootView The view to destroy\n */\nfunction destroyViewTree(rootView) {\n    // If the view has no children, we can clean it up and return early.\n    let lViewOrLContainer = rootView[CHILD_HEAD];\n    if (!lViewOrLContainer) {\n        return cleanUpView(rootView[TVIEW], rootView);\n    }\n    while (lViewOrLContainer) {\n        let next = null;\n        if (isLView(lViewOrLContainer)) {\n            // If LView, traverse down to child.\n            next = lViewOrLContainer[CHILD_HEAD];\n        }\n        else {\n            ngDevMode && assertLContainer(lViewOrLContainer);\n            // If container, traverse down to its first LView.\n            const firstView = lViewOrLContainer[CONTAINER_HEADER_OFFSET];\n            if (firstView)\n                next = firstView;\n        }\n        if (!next) {\n            // Only clean up view when moving to the side or up, as destroy hooks\n            // should be called in order from the bottom up.\n            while (lViewOrLContainer && !lViewOrLContainer[NEXT] && lViewOrLContainer !== rootView) {\n                isLView(lViewOrLContainer) && cleanUpView(lViewOrLContainer[TVIEW], lViewOrLContainer);\n                lViewOrLContainer = getParentState(lViewOrLContainer, rootView);\n            }\n            if (lViewOrLContainer === null)\n                lViewOrLContainer = rootView;\n            isLView(lViewOrLContainer) && cleanUpView(lViewOrLContainer[TVIEW], lViewOrLContainer);\n            next = lViewOrLContainer && lViewOrLContainer[NEXT];\n        }\n        lViewOrLContainer = next;\n    }\n}\n/**\n * Inserts a view into a container.\n *\n * This adds the view to the container's array of active views in the correct\n * position. It also adds the view's elements to the DOM if the container isn't a\n * root node of another view (in that case, the view's elements will be added when\n * the container's parent view is added later).\n *\n * @param tView The `TView' of the `LView` to insert\n * @param lView The view to insert\n * @param lContainer The container into which the view should be inserted\n * @param index Which index in the container to insert the child view into\n */\nfunction insertView(tView, lView, lContainer, index) {\n    ngDevMode && assertLView(lView);\n    ngDevMode && assertLContainer(lContainer);\n    const indexInContainer = CONTAINER_HEADER_OFFSET + index;\n    const containerLength = lContainer.length;\n    if (index > 0) {\n        // This is a new view, we need to add it to the children.\n        lContainer[indexInContainer - 1][NEXT] = lView;\n    }\n    if (index < containerLength - CONTAINER_HEADER_OFFSET) {\n        lView[NEXT] = lContainer[indexInContainer];\n        addToArray(lContainer, CONTAINER_HEADER_OFFSET + index, lView);\n    }\n    else {\n        lContainer.push(lView);\n        lView[NEXT] = null;\n    }\n    lView[PARENT] = lContainer;\n    // track views where declaration and insertion points are different\n    const declarationLContainer = lView[DECLARATION_LCONTAINER];\n    if (declarationLContainer !== null && lContainer !== declarationLContainer) {\n        trackMovedView(declarationLContainer, lView);\n    }\n    // notify query that a new view has been added\n    const lQueries = lView[QUERIES];\n    if (lQueries !== null) {\n        lQueries.insertView(tView);\n    }\n    // Sets the attached flag\n    lView[FLAGS] |= 128 /* Attached */;\n}\n/**\n * Track views created from the declaration container (TemplateRef) and inserted into a\n * different LContainer.\n */\nfunction trackMovedView(declarationContainer, lView) {\n    ngDevMode && assertDefined(lView, 'LView required');\n    ngDevMode && assertLContainer(declarationContainer);\n    const movedViews = declarationContainer[MOVED_VIEWS];\n    const insertedLContainer = lView[PARENT];\n    ngDevMode && assertLContainer(insertedLContainer);\n    const insertedComponentLView = insertedLContainer[PARENT][DECLARATION_COMPONENT_VIEW];\n    ngDevMode && assertDefined(insertedComponentLView, 'Missing insertedComponentLView');\n    const declaredComponentLView = lView[DECLARATION_COMPONENT_VIEW];\n    ngDevMode && assertDefined(declaredComponentLView, 'Missing declaredComponentLView');\n    if (declaredComponentLView !== insertedComponentLView) {\n        // At this point the declaration-component is not same as insertion-component; this means that\n        // this is a transplanted view. Mark the declared lView as having transplanted views so that\n        // those views can participate in CD.\n        declarationContainer[HAS_TRANSPLANTED_VIEWS] = true;\n    }\n    if (movedViews === null) {\n        declarationContainer[MOVED_VIEWS] = [lView];\n    }\n    else {\n        movedViews.push(lView);\n    }\n}\nfunction detachMovedView(declarationContainer, lView) {\n    ngDevMode && assertLContainer(declarationContainer);\n    ngDevMode &&\n        assertDefined(declarationContainer[MOVED_VIEWS], 'A projected view should belong to a non-empty projected views collection');\n    const movedViews = declarationContainer[MOVED_VIEWS];\n    const declarationViewIndex = movedViews.indexOf(lView);\n    const insertionLContainer = lView[PARENT];\n    ngDevMode && assertLContainer(insertionLContainer);\n    // If the view was marked for refresh but then detached before it was checked (where the flag\n    // would be cleared and the counter decremented), we need to decrement the view counter here\n    // instead.\n    if (lView[FLAGS] & 1024 /* RefreshTransplantedView */) {\n        lView[FLAGS] &= ~1024 /* RefreshTransplantedView */;\n        updateTransplantedViewCount(insertionLContainer, -1);\n    }\n    movedViews.splice(declarationViewIndex, 1);\n}\n/**\n * Detaches a view from a container.\n *\n * This method removes the view from the container's array of active views. It also\n * removes the view's elements from the DOM.\n *\n * @param lContainer The container from which to detach a view\n * @param removeIndex The index of the view to detach\n * @returns Detached LView instance.\n */\nfunction detachView(lContainer, removeIndex) {\n    if (lContainer.length <= CONTAINER_HEADER_OFFSET)\n        return;\n    const indexInContainer = CONTAINER_HEADER_OFFSET + removeIndex;\n    const viewToDetach = lContainer[indexInContainer];\n    if (viewToDetach) {\n        const declarationLContainer = viewToDetach[DECLARATION_LCONTAINER];\n        if (declarationLContainer !== null && declarationLContainer !== lContainer) {\n            detachMovedView(declarationLContainer, viewToDetach);\n        }\n        if (removeIndex > 0) {\n            lContainer[indexInContainer - 1][NEXT] = viewToDetach[NEXT];\n        }\n        const removedLView = removeFromArray(lContainer, CONTAINER_HEADER_OFFSET + removeIndex);\n        addRemoveViewFromContainer(viewToDetach[TVIEW], viewToDetach, false, null);\n        // notify query that a view has been removed\n        const lQueries = removedLView[QUERIES];\n        if (lQueries !== null) {\n            lQueries.detachView(removedLView[TVIEW]);\n        }\n        viewToDetach[PARENT] = null;\n        viewToDetach[NEXT] = null;\n        // Unsets the attached flag\n        viewToDetach[FLAGS] &= ~128 /* Attached */;\n    }\n    return viewToDetach;\n}\n/**\n * A standalone function which destroys an LView,\n * conducting clean up (e.g. removing listeners, calling onDestroys).\n *\n * @param tView The `TView' of the `LView` to be destroyed\n * @param lView The view to be destroyed.\n */\nfunction destroyLView(tView, lView) {\n    if (!(lView[FLAGS] & 256 /* Destroyed */)) {\n        const renderer = lView[RENDERER];\n        if (isProceduralRenderer(renderer) && renderer.destroyNode) {\n            applyView(tView, lView, renderer, 3 /* Destroy */, null, null);\n        }\n        destroyViewTree(lView);\n    }\n}\n/**\n * Determines which LViewOrLContainer to jump to when traversing back up the\n * tree in destroyViewTree.\n *\n * Normally, the view's parent LView should be checked, but in the case of\n * embedded views, the container (which is the view node's parent, but not the\n * LView's parent) needs to be checked for a possible next property.\n *\n * @param lViewOrLContainer The LViewOrLContainer for which we need a parent state\n * @param rootView The rootView, so we don't propagate too far up the view tree\n * @returns The correct parent LViewOrLContainer\n */\nfunction getParentState(lViewOrLContainer, rootView) {\n    let tNode;\n    if (isLView(lViewOrLContainer) && (tNode = lViewOrLContainer[T_HOST]) &&\n        tNode.type === 2 /* View */) {\n        // if it's an embedded view, the state needs to go up to the container, in case the\n        // container has a next\n        return getLContainer(tNode, lViewOrLContainer);\n    }\n    else {\n        // otherwise, use parent view for containers or component views\n        return lViewOrLContainer[PARENT] === rootView ? null : lViewOrLContainer[PARENT];\n    }\n}\n/**\n * Calls onDestroys hooks for all directives and pipes in a given view and then removes all\n * listeners. Listeners are removed as the last step so events delivered in the onDestroys hooks\n * can be propagated to @Output listeners.\n *\n * @param tView `TView` for the `LView` to clean up.\n * @param lView The LView to clean up\n */\nfunction cleanUpView(tView, lView) {\n    if (!(lView[FLAGS] & 256 /* Destroyed */)) {\n        // Usually the Attached flag is removed when the view is detached from its parent, however\n        // if it's a root view, the flag won't be unset hence why we're also removing on destroy.\n        lView[FLAGS] &= ~128 /* Attached */;\n        // Mark the LView as destroyed *before* executing the onDestroy hooks. An onDestroy hook\n        // runs arbitrary user code, which could include its own `viewRef.destroy()` (or similar). If\n        // We don't flag the view as destroyed before the hooks, this could lead to an infinite loop.\n        // This also aligns with the ViewEngine behavior. It also means that the onDestroy hook is\n        // really more of an \"afterDestroy\" hook if you think about it.\n        lView[FLAGS] |= 256 /* Destroyed */;\n        executeOnDestroys(tView, lView);\n        removeListeners(tView, lView);\n        const hostTNode = lView[T_HOST];\n        // For component views only, the local renderer is destroyed as clean up time.\n        if (hostTNode && hostTNode.type === 3 /* Element */ &&\n            isProceduralRenderer(lView[RENDERER])) {\n            ngDevMode && ngDevMode.rendererDestroy++;\n            lView[RENDERER].destroy();\n        }\n        const declarationContainer = lView[DECLARATION_LCONTAINER];\n        // we are dealing with an embedded view that is still inserted into a container\n        if (declarationContainer !== null && isLContainer(lView[PARENT])) {\n            // and this is a projected view\n            if (declarationContainer !== lView[PARENT]) {\n                detachMovedView(declarationContainer, lView);\n            }\n            // For embedded views still attached to a container: remove query result from this view.\n            const lQueries = lView[QUERIES];\n            if (lQueries !== null) {\n                lQueries.detachView(tView);\n            }\n        }\n    }\n}\n/** Removes listeners and unsubscribes from output subscriptions */\nfunction removeListeners(tView, lView) {\n    const tCleanup = tView.cleanup;\n    if (tCleanup !== null) {\n        const lCleanup = lView[CLEANUP];\n        for (let i = 0; i < tCleanup.length - 1; i += 2) {\n            if (typeof tCleanup[i] === 'string') {\n                // This is a native DOM listener\n                const idxOrTargetGetter = tCleanup[i + 1];\n                const target = typeof idxOrTargetGetter === 'function' ?\n                    idxOrTargetGetter(lView) :\n                    unwrapRNode(lView[idxOrTargetGetter]);\n                const listener = lCleanup[tCleanup[i + 2]];\n                const useCaptureOrSubIdx = tCleanup[i + 3];\n                if (typeof useCaptureOrSubIdx === 'boolean') {\n                    // native DOM listener registered with Renderer3\n                    target.removeEventListener(tCleanup[i], listener, useCaptureOrSubIdx);\n                }\n                else {\n                    if (useCaptureOrSubIdx >= 0) {\n                        // unregister\n                        lCleanup[useCaptureOrSubIdx]();\n                    }\n                    else {\n                        // Subscription\n                        lCleanup[-useCaptureOrSubIdx].unsubscribe();\n                    }\n                }\n                i += 2;\n            }\n            else {\n                // This is a cleanup function that is grouped with the index of its context\n                const context = lCleanup[tCleanup[i + 1]];\n                tCleanup[i].call(context);\n            }\n        }\n        lView[CLEANUP] = null;\n    }\n}\n/** Calls onDestroy hooks for this view */\nfunction executeOnDestroys(tView, lView) {\n    let destroyHooks;\n    if (tView != null && (destroyHooks = tView.destroyHooks) != null) {\n        for (let i = 0; i < destroyHooks.length; i += 2) {\n            const context = lView[destroyHooks[i]];\n            // Only call the destroy hook if the context has been requested.\n            if (!(context instanceof NodeInjectorFactory)) {\n                const toCall = destroyHooks[i + 1];\n                if (Array.isArray(toCall)) {\n                    for (let j = 0; j < toCall.length; j += 2) {\n                        toCall[j + 1].call(context[toCall[j]]);\n                    }\n                }\n                else {\n                    toCall.call(context);\n                }\n            }\n        }\n    }\n}\n/**\n * Returns a native element if a node can be inserted into the given parent.\n *\n * There are two reasons why we may not be able to insert a element immediately.\n * - Projection: When creating a child content element of a component, we have to skip the\n *   insertion because the content of a component will be projected.\n *   `<component><content>delayed due to projection</content></component>`\n * - Parent container is disconnected: This can happen when we are inserting a view into\n *   parent container, which itself is disconnected. For example the parent container is part\n *   of a View which has not be inserted or is made for projection but has not been inserted\n *   into destination.\n */\nfunction getRenderParent(tView, tNode, currentView) {\n    // Skip over element and ICU containers as those are represented by a comment node and\n    // can't be used as a render parent.\n    let parentTNode = tNode.parent;\n    while (parentTNode != null &&\n        (parentTNode.type === 4 /* ElementContainer */ ||\n            parentTNode.type === 5 /* IcuContainer */)) {\n        tNode = parentTNode;\n        parentTNode = tNode.parent;\n    }\n    // If the parent tNode is null, then we are inserting across views: either into an embedded view\n    // or a component view.\n    if (parentTNode == null) {\n        const hostTNode = currentView[T_HOST];\n        if (hostTNode.type === 2 /* View */) {\n            // We are inserting a root element of an embedded view We might delay insertion of children\n            // for a given view if it is disconnected. This might happen for 2 main reasons:\n            // - view is not inserted into any container(view was created but not inserted yet)\n            // - view is inserted into a container but the container itself is not inserted into the DOM\n            // (container might be part of projection or child of a view that is not inserted yet).\n            // In other words we can insert children of a given view if this view was inserted into a\n            // container and the container itself has its render parent determined.\n            return getContainerRenderParent(hostTNode, currentView);\n        }\n        else {\n            // We are inserting a root element of the component view into the component host element and\n            // it should always be eager.\n            ngDevMode && assertNodeOfPossibleTypes(hostTNode, [3 /* Element */]);\n            return currentView[HOST];\n        }\n    }\n    else {\n        const isIcuCase = tNode && tNode.type === 5 /* IcuContainer */;\n        // If the parent of this node is an ICU container, then it is represented by comment node and we\n        // need to use it as an anchor. If it is projected then it's direct parent node is the renderer.\n        if (isIcuCase && tNode.flags & 4 /* isProjected */) {\n            return getNativeByTNode(tNode, currentView).parentNode;\n        }\n        ngDevMode && assertNodeType(parentTNode, 3 /* Element */);\n        if (parentTNode.flags & 2 /* isComponentHost */) {\n            const tData = tView.data;\n            const tNode = tData[parentTNode.index];\n            const encapsulation = tData[tNode.directiveStart].encapsulation;\n            // We've got a parent which is an element in the current view. We just need to verify if the\n            // parent element is not a component. Component's content nodes are not inserted immediately\n            // because they will be projected, and so doing insert at this point would be wasteful.\n            // Since the projection would then move it to its final destination. Note that we can't\n            // make this assumption when using the Shadow DOM, because the native projection placeholders\n            // (<content> or <slot>) have to be in place as elements are being inserted.\n            if (encapsulation !== ViewEncapsulation$1.ShadowDom &&\n                encapsulation !== ViewEncapsulation$1.Native) {\n                return null;\n            }\n        }\n        return getNativeByTNode(parentTNode, currentView);\n    }\n}\n/**\n * Inserts a native node before another native node for a given parent using {@link Renderer3}.\n * This is a utility function that can be used when native nodes were determined - it abstracts an\n * actual renderer being used.\n */\nfunction nativeInsertBefore(renderer, parent, child, beforeNode) {\n    ngDevMode && ngDevMode.rendererInsertBefore++;\n    if (isProceduralRenderer(renderer)) {\n        renderer.insertBefore(parent, child, beforeNode);\n    }\n    else {\n        parent.insertBefore(child, beforeNode, true);\n    }\n}\nfunction nativeAppendChild(renderer, parent, child) {\n    ngDevMode && ngDevMode.rendererAppendChild++;\n    ngDevMode && assertDefined(parent, 'parent node must be defined');\n    if (isProceduralRenderer(renderer)) {\n        renderer.appendChild(parent, child);\n    }\n    else {\n        parent.appendChild(child);\n    }\n}\nfunction nativeAppendOrInsertBefore(renderer, parent, child, beforeNode) {\n    if (beforeNode !== null) {\n        nativeInsertBefore(renderer, parent, child, beforeNode);\n    }\n    else {\n        nativeAppendChild(renderer, parent, child);\n    }\n}\n/** Removes a node from the DOM given its native parent. */\nfunction nativeRemoveChild(renderer, parent, child, isHostElement) {\n    if (isProceduralRenderer(renderer)) {\n        renderer.removeChild(parent, child, isHostElement);\n    }\n    else {\n        parent.removeChild(child);\n    }\n}\n/**\n * Returns a native parent of a given native node.\n */\nfunction nativeParentNode(renderer, node) {\n    return (isProceduralRenderer(renderer) ? renderer.parentNode(node) : node.parentNode);\n}\n/**\n * Returns a native sibling of a given native node.\n */\nfunction nativeNextSibling(renderer, node) {\n    return isProceduralRenderer(renderer) ? renderer.nextSibling(node) : node.nextSibling;\n}\n/**\n * Finds a native \"anchor\" node for cases where we can't append a native child directly\n * (`appendChild`) and need to use a reference (anchor) node for the `insertBefore` operation.\n * @param parentTNode\n * @param lView\n */\nfunction getNativeAnchorNode(parentTNode, lView) {\n    if (parentTNode.type === 2 /* View */) {\n        const lContainer = getLContainer(parentTNode, lView);\n        if (lContainer === null)\n            return null;\n        const index = lContainer.indexOf(lView, CONTAINER_HEADER_OFFSET) - CONTAINER_HEADER_OFFSET;\n        return getBeforeNodeForView(index, lContainer);\n    }\n    else if (parentTNode.type === 4 /* ElementContainer */ ||\n        parentTNode.type === 5 /* IcuContainer */) {\n        return getNativeByTNode(parentTNode, lView);\n    }\n    return null;\n}\n/**\n * Appends the `child` native node (or a collection of nodes) to the `parent`.\n *\n * The element insertion might be delayed {@link canInsertNativeNode}.\n *\n * @param tView The `TView' to be appended\n * @param lView The current LView\n * @param childEl The native child (or children) that should be appended\n * @param childTNode The TNode of the child element\n * @returns Whether or not the child was appended\n */\nfunction appendChild(tView, lView, childEl, childTNode) {\n    const renderParent = getRenderParent(tView, childTNode, lView);\n    if (renderParent != null) {\n        const renderer = lView[RENDERER];\n        const parentTNode = childTNode.parent || lView[T_HOST];\n        const anchorNode = getNativeAnchorNode(parentTNode, lView);\n        if (Array.isArray(childEl)) {\n            for (let i = 0; i < childEl.length; i++) {\n                nativeAppendOrInsertBefore(renderer, renderParent, childEl[i], anchorNode);\n            }\n        }\n        else {\n            nativeAppendOrInsertBefore(renderer, renderParent, childEl, anchorNode);\n        }\n    }\n}\n/**\n * Returns the first native node for a given LView, starting from the provided TNode.\n *\n * Native nodes are returned in the order in which those appear in the native tree (DOM).\n */\nfunction getFirstNativeNode(lView, tNode) {\n    if (tNode !== null) {\n        ngDevMode && assertNodeOfPossibleTypes(tNode, [\n            3 /* Element */, 0 /* Container */, 4 /* ElementContainer */, 5 /* IcuContainer */,\n            1 /* Projection */\n        ]);\n        const tNodeType = tNode.type;\n        if (tNodeType === 3 /* Element */) {\n            return getNativeByTNode(tNode, lView);\n        }\n        else if (tNodeType === 0 /* Container */) {\n            return getBeforeNodeForView(-1, lView[tNode.index]);\n        }\n        else if (tNodeType === 4 /* ElementContainer */ || tNodeType === 5 /* IcuContainer */) {\n            const elIcuContainerChild = tNode.child;\n            if (elIcuContainerChild !== null) {\n                return getFirstNativeNode(lView, elIcuContainerChild);\n            }\n            else {\n                const rNodeOrLContainer = lView[tNode.index];\n                if (isLContainer(rNodeOrLContainer)) {\n                    return getBeforeNodeForView(-1, rNodeOrLContainer);\n                }\n                else {\n                    return unwrapRNode(rNodeOrLContainer);\n                }\n            }\n        }\n        else {\n            const componentView = lView[DECLARATION_COMPONENT_VIEW];\n            const componentHost = componentView[T_HOST];\n            const parentView = getLViewParent(componentView);\n            const firstProjectedTNode = componentHost.projection[tNode.projection];\n            if (firstProjectedTNode != null) {\n                return getFirstNativeNode(parentView, firstProjectedTNode);\n            }\n            else {\n                return getFirstNativeNode(lView, tNode.next);\n            }\n        }\n    }\n    return null;\n}\nfunction getBeforeNodeForView(viewIndexInContainer, lContainer) {\n    const nextViewIndex = CONTAINER_HEADER_OFFSET + viewIndexInContainer + 1;\n    if (nextViewIndex < lContainer.length) {\n        const lView = lContainer[nextViewIndex];\n        const firstTNodeOfView = lView[TVIEW].firstChild;\n        if (firstTNodeOfView !== null) {\n            return getFirstNativeNode(lView, firstTNodeOfView);\n        }\n    }\n    return lContainer[NATIVE];\n}\n/**\n * Removes a native node itself using a given renderer. To remove the node we are looking up its\n * parent from the native tree as not all platforms / browsers support the equivalent of\n * node.remove().\n *\n * @param renderer A renderer to be used\n * @param rNode The native node that should be removed\n * @param isHostElement A flag indicating if a node to be removed is a host of a component.\n */\nfunction nativeRemoveNode(renderer, rNode, isHostElement) {\n    const nativeParent = nativeParentNode(renderer, rNode);\n    if (nativeParent) {\n        nativeRemoveChild(renderer, nativeParent, rNode, isHostElement);\n    }\n}\n/**\n * Performs the operation of `action` on the node. Typically this involves inserting or removing\n * nodes on the LView or projection boundary.\n */\nfunction applyNodes(renderer, action, tNode, lView, renderParent, beforeNode, isProjection) {\n    while (tNode != null) {\n        ngDevMode && assertTNodeForLView(tNode, lView);\n        ngDevMode && assertNodeOfPossibleTypes(tNode, [\n            0 /* Container */, 3 /* Element */, 4 /* ElementContainer */, 1 /* Projection */,\n            5 /* IcuContainer */\n        ]);\n        const rawSlotValue = lView[tNode.index];\n        const tNodeType = tNode.type;\n        if (isProjection) {\n            if (action === 0 /* Create */) {\n                rawSlotValue && attachPatchData(unwrapRNode(rawSlotValue), lView);\n                tNode.flags |= 4 /* isProjected */;\n            }\n        }\n        if ((tNode.flags & 64 /* isDetached */) !== 64 /* isDetached */) {\n            if (tNodeType === 4 /* ElementContainer */ || tNodeType === 5 /* IcuContainer */) {\n                applyNodes(renderer, action, tNode.child, lView, renderParent, beforeNode, false);\n                applyToElementOrContainer(action, renderer, renderParent, rawSlotValue, beforeNode);\n            }\n            else if (tNodeType === 1 /* Projection */) {\n                applyProjectionRecursive(renderer, action, lView, tNode, renderParent, beforeNode);\n            }\n            else {\n                ngDevMode && assertNodeOfPossibleTypes(tNode, [3 /* Element */, 0 /* Container */]);\n                applyToElementOrContainer(action, renderer, renderParent, rawSlotValue, beforeNode);\n            }\n        }\n        tNode = isProjection ? tNode.projectionNext : tNode.next;\n    }\n}\n/**\n * `applyView` performs operation on the view as specified in `action` (insert, detach, destroy)\n *\n * Inserting a view without projection or containers at top level is simple. Just iterate over the\n * root nodes of the View, and for each node perform the `action`.\n *\n * Things get more complicated with containers and projections. That is because coming across:\n * - Container: implies that we have to insert/remove/destroy the views of that container as well\n *              which in turn can have their own Containers at the View roots.\n * - Projection: implies that we have to insert/remove/destroy the nodes of the projection. The\n *               complication is that the nodes we are projecting can themselves have Containers\n *               or other Projections.\n *\n * As you can see this is a very recursive problem. Yes recursion is not most efficient but the\n * code is complicated enough that trying to implemented with recursion becomes unmaintainable.\n *\n * @param tView The `TView' which needs to be inserted, detached, destroyed\n * @param lView The LView which needs to be inserted, detached, destroyed.\n * @param renderer Renderer to use\n * @param action action to perform (insert, detach, destroy)\n * @param renderParent parent DOM element for insertion/removal.\n * @param beforeNode Before which node the insertions should happen.\n */\nfunction applyView(tView, lView, renderer, action, renderParent, beforeNode) {\n    ngDevMode && assertNodeType(tView.node, 2 /* View */);\n    const viewRootTNode = tView.node.child;\n    applyNodes(renderer, action, viewRootTNode, lView, renderParent, beforeNode, false);\n}\n/**\n * `applyProjection` performs operation on the projection.\n *\n * Inserting a projection requires us to locate the projected nodes from the parent component. The\n * complication is that those nodes themselves could be re-projected from their parent component.\n *\n * @param tView The `TView` of `LView` which needs to be inserted, detached, destroyed\n * @param lView The `LView` which needs to be inserted, detached, destroyed.\n * @param tProjectionNode node to project\n */\nfunction applyProjection(tView, lView, tProjectionNode) {\n    const renderer = lView[RENDERER];\n    const renderParent = getRenderParent(tView, tProjectionNode, lView);\n    const parentTNode = tProjectionNode.parent || lView[T_HOST];\n    let beforeNode = getNativeAnchorNode(parentTNode, lView);\n    applyProjectionRecursive(renderer, 0 /* Create */, lView, tProjectionNode, renderParent, beforeNode);\n}\n/**\n * `applyProjectionRecursive` performs operation on the projection specified by `action` (insert,\n * detach, destroy)\n *\n * Inserting a projection requires us to locate the projected nodes from the parent component. The\n * complication is that those nodes themselves could be re-projected from their parent component.\n *\n * @param renderer Render to use\n * @param action action to perform (insert, detach, destroy)\n * @param lView The LView which needs to be inserted, detached, destroyed.\n * @param tProjectionNode node to project\n * @param renderParent parent DOM element for insertion/removal.\n * @param beforeNode Before which node the insertions should happen.\n */\nfunction applyProjectionRecursive(renderer, action, lView, tProjectionNode, renderParent, beforeNode) {\n    const componentLView = lView[DECLARATION_COMPONENT_VIEW];\n    const componentNode = componentLView[T_HOST];\n    ngDevMode &&\n        assertEqual(typeof tProjectionNode.projection, 'number', 'expecting projection index');\n    const nodeToProjectOrRNodes = componentNode.projection[tProjectionNode.projection];\n    if (Array.isArray(nodeToProjectOrRNodes)) {\n        // This should not exist, it is a bit of a hack. When we bootstrap a top level node and we\n        // need to support passing projectable nodes, so we cheat and put them in the TNode\n        // of the Host TView. (Yes we put instance info at the T Level). We can get away with it\n        // because we know that that TView is not shared and therefore it will not be a problem.\n        // This should be refactored and cleaned up.\n        for (let i = 0; i < nodeToProjectOrRNodes.length; i++) {\n            const rNode = nodeToProjectOrRNodes[i];\n            applyToElementOrContainer(action, renderer, renderParent, rNode, beforeNode);\n        }\n    }\n    else {\n        let nodeToProject = nodeToProjectOrRNodes;\n        const projectedComponentLView = componentLView[PARENT];\n        applyNodes(renderer, action, nodeToProject, projectedComponentLView, renderParent, beforeNode, true);\n    }\n}\n/**\n * `applyContainer` performs an operation on the container and its views as specified by\n * `action` (insert, detach, destroy)\n *\n * Inserting a Container is complicated by the fact that the container may have Views which\n * themselves have containers or projections.\n *\n * @param renderer Renderer to use\n * @param action action to perform (insert, detach, destroy)\n * @param lContainer The LContainer which needs to be inserted, detached, destroyed.\n * @param renderParent parent DOM element for insertion/removal.\n * @param beforeNode Before which node the insertions should happen.\n */\nfunction applyContainer(renderer, action, lContainer, renderParent, beforeNode) {\n    ngDevMode && assertLContainer(lContainer);\n    const anchor = lContainer[NATIVE]; // LContainer has its own before node.\n    const native = unwrapRNode(lContainer);\n    // An LContainer can be created dynamically on any node by injecting ViewContainerRef.\n    // Asking for a ViewContainerRef on an element will result in a creation of a separate anchor node\n    // (comment in the DOM) that will be different from the LContainer's host node. In this particular\n    // case we need to execute action on 2 nodes:\n    // - container's host node (this is done in the executeActionOnElementOrContainer)\n    // - container's host node (this is done here)\n    if (anchor !== native) {\n        // This is very strange to me (Misko). I would expect that the native is same as anchor. I don't\n        // see a reason why they should be different, but they are.\n        //\n        // If they are we need to process the second anchor as well.\n        applyToElementOrContainer(action, renderer, renderParent, anchor, beforeNode);\n    }\n    for (let i = CONTAINER_HEADER_OFFSET; i < lContainer.length; i++) {\n        const lView = lContainer[i];\n        applyView(lView[TVIEW], lView, renderer, action, renderParent, anchor);\n    }\n}\n/**\n * Writes class/style to element.\n *\n * @param renderer Renderer to use.\n * @param isClassBased `true` if it should be written to `class` (`false` to write to `style`)\n * @param rNode The Node to write to.\n * @param prop Property to write to. This would be the class/style name.\n * @param value Value to write. If `null`/`undefined`/`false` this is considered a remove (set/add\n *        otherwise).\n */\nfunction applyStyling(renderer, isClassBased, rNode, prop, value) {\n    const isProcedural = isProceduralRenderer(renderer);\n    if (isClassBased) {\n        // We actually want JS true/false here because any truthy value should add the class\n        if (!value) {\n            ngDevMode && ngDevMode.rendererRemoveClass++;\n            if (isProcedural) {\n                renderer.removeClass(rNode, prop);\n            }\n            else {\n                rNode.classList.remove(prop);\n            }\n        }\n        else {\n            ngDevMode && ngDevMode.rendererAddClass++;\n            if (isProcedural) {\n                renderer.addClass(rNode, prop);\n            }\n            else {\n                ngDevMode && assertDefined(rNode.classList, 'HTMLElement expected');\n                rNode.classList.add(prop);\n            }\n        }\n    }\n    else {\n        // TODO(misko): Can't import RendererStyleFlags2.DashCase as it causes imports to be resolved in\n        // different order which causes failures. Using direct constant as workaround for now.\n        const flags = prop.indexOf('-') == -1 ? undefined : 2 /* RendererStyleFlags2.DashCase */;\n        if (value == null /** || value === undefined */) {\n            ngDevMode && ngDevMode.rendererRemoveStyle++;\n            if (isProcedural) {\n                renderer.removeStyle(rNode, prop, flags);\n            }\n            else {\n                rNode.style.removeProperty(prop);\n            }\n        }\n        else {\n            ngDevMode && ngDevMode.rendererSetStyle++;\n            if (isProcedural) {\n                renderer.setStyle(rNode, prop, value, flags);\n            }\n            else {\n                ngDevMode && assertDefined(rNode.style, 'HTMLElement expected');\n                rNode.style.setProperty(prop, value);\n            }\n        }\n    }\n}\n/**\n * Write `cssText` to `RElement`.\n *\n * This function does direct write without any reconciliation. Used for writing initial values, so\n * that static styling values do not pull in the style parser.\n *\n * @param renderer Renderer to use\n * @param element The element which needs to be updated.\n * @param newValue The new class list to write.\n */\nfunction writeDirectStyle(renderer, element, newValue) {\n    ngDevMode && assertString(newValue, '\\'newValue\\' should be a string');\n    if (isProceduralRenderer(renderer)) {\n        renderer.setAttribute(element, 'style', newValue);\n    }\n    else {\n        element.style.cssText = newValue;\n    }\n    ngDevMode && ngDevMode.rendererSetStyle++;\n}\n/**\n * Write `className` to `RElement`.\n *\n * This function does direct write without any reconciliation. Used for writing initial values, so\n * that static styling values do not pull in the style parser.\n *\n * @param renderer Renderer to use\n * @param element The element which needs to be updated.\n * @param newValue The new class list to write.\n */\nfunction writeDirectClass(renderer, element, newValue) {\n    ngDevMode && assertString(newValue, '\\'newValue\\' should be a string');\n    if (isProceduralRenderer(renderer)) {\n        if (newValue === '') {\n            // There are tests in `google3` which expect `element.getAttribute('class')` to be `null`.\n            renderer.removeAttribute(element, 'class');\n        }\n        else {\n            renderer.setAttribute(element, 'class', newValue);\n        }\n    }\n    else {\n        element.className = newValue;\n    }\n    ngDevMode && ngDevMode.rendererSetClassName++;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * If `startTNode.parent` exists and has an injector, returns TNode for that injector.\n * Otherwise, unwraps a parent injector location number to find the view offset from the current\n * injector, then walks up the declaration view tree until the TNode of the parent injector is\n * found.\n *\n * @param location The location of the parent injector, which contains the view offset\n * @param startView The LView instance from which to start walking up the view tree\n * @param startTNode The TNode instance of the starting element\n * @returns The TNode of the parent injector\n */\nfunction getParentInjectorTNode(location, startView, startTNode) {\n    // If there is an injector on the parent TNode, retrieve the TNode for that injector.\n    if (startTNode.parent && startTNode.parent.injectorIndex !== -1) {\n        // view offset is 0\n        const injectorIndex = startTNode.parent.injectorIndex;\n        let tNode = startTNode.parent;\n        // If tNode.injectorIndex === tNode.parent.injectorIndex, then the index belongs to a parent\n        // injector.\n        while (tNode.parent != null && injectorIndex == tNode.parent.injectorIndex) {\n            tNode = tNode.parent;\n        }\n        return tNode;\n    }\n    let viewOffset = getParentInjectorViewOffset(location);\n    // view offset is 1\n    let parentView = startView;\n    let parentTNode = startView[T_HOST];\n    // view offset is superior to 1\n    while (viewOffset > 1) {\n        parentView = parentView[DECLARATION_VIEW];\n        parentTNode = parentView[T_HOST];\n        viewOffset--;\n    }\n    return parentTNode;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass ViewRef {\n    constructor(\n    /**\n     * This represents `LView` associated with the component when ViewRef is a ChangeDetectorRef.\n     *\n     * When ViewRef is created for a dynamic component, this also represents the `LView` for the\n     * component.\n     *\n     * For a \"regular\" ViewRef created for an embedded view, this is the `LView` for the embedded\n     * view.\n     *\n     * @internal\n     */\n    _lView, \n    /**\n     * This represents the `LView` associated with the point where `ChangeDetectorRef` was\n     * requested.\n     *\n     * This may be different from `_lView` if the `_cdRefInjectingView` is an embedded view.\n     */\n    _cdRefInjectingView) {\n        this._lView = _lView;\n        this._cdRefInjectingView = _cdRefInjectingView;\n        this._appRef = null;\n        this._viewContainerRef = null;\n    }\n    get rootNodes() {\n        const lView = this._lView;\n        if (lView[HOST] == null) {\n            const hostTView = lView[T_HOST];\n            return collectNativeNodes(lView[TVIEW], lView, hostTView.child, []);\n        }\n        return [];\n    }\n    get context() {\n        return this._lView[CONTEXT];\n    }\n    get destroyed() {\n        return (this._lView[FLAGS] & 256 /* Destroyed */) === 256 /* Destroyed */;\n    }\n    destroy() {\n        if (this._appRef) {\n            this._appRef.detachView(this);\n        }\n        else if (this._viewContainerRef) {\n            const index = this._viewContainerRef.indexOf(this);\n            if (index > -1) {\n                this._viewContainerRef.detach(index);\n            }\n            this._viewContainerRef = null;\n        }\n        destroyLView(this._lView[TVIEW], this._lView);\n    }\n    onDestroy(callback) {\n        storeCleanupWithContext(this._lView[TVIEW], this._lView, null, callback);\n    }\n    /**\n     * Marks a view and all of its ancestors dirty.\n     *\n     * It also triggers change detection by calling `scheduleTick` internally, which coalesces\n     * multiple `markForCheck` calls to into one change detection run.\n     *\n     * This can be used to ensure an {@link ChangeDetectionStrategy#OnPush OnPush} component is\n     * checked when it needs to be re-rendered but the two normal triggers haven't marked it\n     * dirty (i.e. inputs haven't changed and events haven't fired in the view).\n     *\n     * <!-- TODO: Add a link to a chapter on OnPush components -->\n     *\n     * @usageNotes\n     * ### Example\n     *\n     * ```typescript\n     * @Component({\n     *   selector: 'my-app',\n     *   template: `Number of ticks: {{numberOfTicks}}`\n     *   changeDetection: ChangeDetectionStrategy.OnPush,\n     * })\n     * class AppComponent {\n     *   numberOfTicks = 0;\n     *\n     *   constructor(private ref: ChangeDetectorRef) {\n     *     setInterval(() => {\n     *       this.numberOfTicks++;\n     *       // the following is required, otherwise the view will not be updated\n     *       this.ref.markForCheck();\n     *     }, 1000);\n     *   }\n     * }\n     * ```\n     */\n    markForCheck() {\n        markViewDirty(this._cdRefInjectingView || this._lView);\n    }\n    /**\n     * Detaches the view from the change detection tree.\n     *\n     * Detached views will not be checked during change detection runs until they are\n     * re-attached, even if they are dirty. `detach` can be used in combination with\n     * {@link ChangeDetectorRef#detectChanges detectChanges} to implement local change\n     * detection checks.\n     *\n     * <!-- TODO: Add a link to a chapter on detach/reattach/local digest -->\n     * <!-- TODO: Add a live demo once ref.detectChanges is merged into master -->\n     *\n     * @usageNotes\n     * ### Example\n     *\n     * The following example defines a component with a large list of readonly data.\n     * Imagine the data changes constantly, many times per second. For performance reasons,\n     * we want to check and update the list every five seconds. We can do that by detaching\n     * the component's change detector and doing a local check every five seconds.\n     *\n     * ```typescript\n     * class DataProvider {\n     *   // in a real application the returned data will be different every time\n     *   get data() {\n     *     return [1,2,3,4,5];\n     *   }\n     * }\n     *\n     * @Component({\n     *   selector: 'giant-list',\n     *   template: `\n     *     <li *ngFor=\"let d of dataProvider.data\">Data {{d}}</li>\n     *   `,\n     * })\n     * class GiantList {\n     *   constructor(private ref: ChangeDetectorRef, private dataProvider: DataProvider) {\n     *     ref.detach();\n     *     setInterval(() => {\n     *       this.ref.detectChanges();\n     *     }, 5000);\n     *   }\n     * }\n     *\n     * @Component({\n     *   selector: 'app',\n     *   providers: [DataProvider],\n     *   template: `\n     *     <giant-list><giant-list>\n     *   `,\n     * })\n     * class App {\n     * }\n     * ```\n     */\n    detach() {\n        this._lView[FLAGS] &= ~128 /* Attached */;\n    }\n    /**\n     * Re-attaches a view to the change detection tree.\n     *\n     * This can be used to re-attach views that were previously detached from the tree\n     * using {@link ChangeDetectorRef#detach detach}. Views are attached to the tree by default.\n     *\n     * <!-- TODO: Add a link to a chapter on detach/reattach/local digest -->\n     *\n     * @usageNotes\n     * ### Example\n     *\n     * The following example creates a component displaying `live` data. The component will detach\n     * its change detector from the main change detector tree when the component's live property\n     * is set to false.\n     *\n     * ```typescript\n     * class DataProvider {\n     *   data = 1;\n     *\n     *   constructor() {\n     *     setInterval(() => {\n     *       this.data = this.data * 2;\n     *     }, 500);\n     *   }\n     * }\n     *\n     * @Component({\n     *   selector: 'live-data',\n     *   inputs: ['live'],\n     *   template: 'Data: {{dataProvider.data}}'\n     * })\n     * class LiveData {\n     *   constructor(private ref: ChangeDetectorRef, private dataProvider: DataProvider) {}\n     *\n     *   set live(value) {\n     *     if (value) {\n     *       this.ref.reattach();\n     *     } else {\n     *       this.ref.detach();\n     *     }\n     *   }\n     * }\n     *\n     * @Component({\n     *   selector: 'my-app',\n     *   providers: [DataProvider],\n     *   template: `\n     *     Live Update: <input type=\"checkbox\" [(ngModel)]=\"live\">\n     *     <live-data [live]=\"live\"><live-data>\n     *   `,\n     * })\n     * class AppComponent {\n     *   live = true;\n     * }\n     * ```\n     */\n    reattach() {\n        this._lView[FLAGS] |= 128 /* Attached */;\n    }\n    /**\n     * Checks the view and its children.\n     *\n     * This can also be used in combination with {@link ChangeDetectorRef#detach detach} to implement\n     * local change detection checks.\n     *\n     * <!-- TODO: Add a link to a chapter on detach/reattach/local digest -->\n     * <!-- TODO: Add a live demo once ref.detectChanges is merged into master -->\n     *\n     * @usageNotes\n     * ### Example\n     *\n     * The following example defines a component with a large list of readonly data.\n     * Imagine, the data changes constantly, many times per second. For performance reasons,\n     * we want to check and update the list every five seconds.\n     *\n     * We can do that by detaching the component's change detector and doing a local change detection\n     * check every five seconds.\n     *\n     * See {@link ChangeDetectorRef#detach detach} for more information.\n     */\n    detectChanges() {\n        detectChangesInternal(this._lView[TVIEW], this._lView, this.context);\n    }\n    /**\n     * Checks the change detector and its children, and throws if any changes are detected.\n     *\n     * This is used in development mode to verify that running change detection doesn't\n     * introduce other changes.\n     */\n    checkNoChanges() {\n        checkNoChangesInternal(this._lView[TVIEW], this._lView, this.context);\n    }\n    attachToViewContainerRef(vcRef) {\n        if (this._appRef) {\n            throw new Error('This view is already attached directly to the ApplicationRef!');\n        }\n        this._viewContainerRef = vcRef;\n    }\n    detachFromAppRef() {\n        this._appRef = null;\n        renderDetachView(this._lView[TVIEW], this._lView);\n    }\n    attachToAppRef(appRef) {\n        if (this._viewContainerRef) {\n            throw new Error('This view is already attached to a ViewContainer!');\n        }\n        this._appRef = appRef;\n    }\n}\n/** @internal */\nclass RootViewRef extends ViewRef {\n    constructor(_view) {\n        super(_view);\n        this._view = _view;\n    }\n    detectChanges() {\n        detectChangesInRootView(this._view);\n    }\n    checkNoChanges() {\n        checkNoChangesInRootView(this._view);\n    }\n    get context() {\n        return null;\n    }\n}\nfunction collectNativeNodes(tView, lView, tNode, result, isProjection = false) {\n    while (tNode !== null) {\n        ngDevMode && assertNodeOfPossibleTypes(tNode, [\n            3 /* Element */, 0 /* Container */, 1 /* Projection */, 4 /* ElementContainer */,\n            5 /* IcuContainer */\n        ]);\n        const lNode = lView[tNode.index];\n        if (lNode !== null) {\n            result.push(unwrapRNode(lNode));\n        }\n        // A given lNode can represent either a native node or a LContainer (when it is a host of a\n        // ViewContainerRef). When we find a LContainer we need to descend into it to collect root nodes\n        // from the views in this container.\n        if (isLContainer(lNode)) {\n            for (let i = CONTAINER_HEADER_OFFSET; i < lNode.length; i++) {\n                const lViewInAContainer = lNode[i];\n                const lViewFirstChildTNode = lViewInAContainer[TVIEW].firstChild;\n                if (lViewFirstChildTNode !== null) {\n                    collectNativeNodes(lViewInAContainer[TVIEW], lViewInAContainer, lViewFirstChildTNode, result);\n                }\n            }\n        }\n        const tNodeType = tNode.type;\n        if (tNodeType === 4 /* ElementContainer */ || tNodeType === 5 /* IcuContainer */) {\n            collectNativeNodes(tView, lView, tNode.child, result);\n        }\n        else if (tNodeType === 1 /* Projection */) {\n            const componentView = lView[DECLARATION_COMPONENT_VIEW];\n            const componentHost = componentView[T_HOST];\n            const slotIdx = tNode.projection;\n            ngDevMode &&\n                assertDefined(componentHost.projection, 'Components with projection nodes (<ng-content>) must have projection slots defined.');\n            const nodesInSlot = componentHost.projection[slotIdx];\n            if (Array.isArray(nodesInSlot)) {\n                result.push(...nodesInSlot);\n            }\n            else {\n                const parentView = getLViewParent(componentView);\n                ngDevMode &&\n                    assertDefined(parentView, 'Component views should always have a parent view (component\\'s host view)');\n                collectNativeNodes(parentView[TVIEW], parentView, nodesInSlot, result, true);\n            }\n        }\n        tNode = isProjection ? tNode.projectionNext : tNode.next;\n    }\n    return result;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Creates an ElementRef from the most recent node.\n *\n * @returns The ElementRef instance to use\n */\nfunction injectElementRef(ElementRefToken) {\n    return createElementRef(ElementRefToken, getPreviousOrParentTNode(), getLView());\n}\nlet R3ElementRef;\n/**\n * Creates an ElementRef given a node.\n *\n * @param ElementRefToken The ElementRef type\n * @param tNode The node for which you'd like an ElementRef\n * @param view The view to which the node belongs\n * @returns The ElementRef instance to use\n */\nfunction createElementRef(ElementRefToken, tNode, view) {\n    if (!R3ElementRef) {\n        R3ElementRef = class ElementRef extends ElementRefToken {\n        };\n    }\n    return new R3ElementRef(getNativeByTNode(tNode, view));\n}\nlet R3TemplateRef;\n/**\n * Creates a TemplateRef given a node.\n *\n * @returns The TemplateRef instance to use\n */\nfunction injectTemplateRef(TemplateRefToken, ElementRefToken) {\n    return createTemplateRef(TemplateRefToken, ElementRefToken, getPreviousOrParentTNode(), getLView());\n}\n/**\n * Creates a TemplateRef and stores it on the injector.\n *\n * @param TemplateRefToken The TemplateRef type\n * @param ElementRefToken The ElementRef type\n * @param hostTNode The node on which a TemplateRef is requested\n * @param hostView The view to which the node belongs\n * @returns The TemplateRef instance or null if we can't create a TemplateRef on a given node type\n */\nfunction createTemplateRef(TemplateRefToken, ElementRefToken, hostTNode, hostView) {\n    if (!R3TemplateRef) {\n        R3TemplateRef = class TemplateRef extends TemplateRefToken {\n            constructor(_declarationView, _declarationTContainer, elementRef) {\n                super();\n                this._declarationView = _declarationView;\n                this._declarationTContainer = _declarationTContainer;\n                this.elementRef = elementRef;\n            }\n            createEmbeddedView(context) {\n                const embeddedTView = this._declarationTContainer.tViews;\n                const embeddedLView = createLView(this._declarationView, embeddedTView, context, 16 /* CheckAlways */, null, embeddedTView.node);\n                const declarationLContainer = this._declarationView[this._declarationTContainer.index];\n                ngDevMode && assertLContainer(declarationLContainer);\n                embeddedLView[DECLARATION_LCONTAINER] = declarationLContainer;\n                const declarationViewLQueries = this._declarationView[QUERIES];\n                if (declarationViewLQueries !== null) {\n                    embeddedLView[QUERIES] = declarationViewLQueries.createEmbeddedView(embeddedTView);\n                }\n                renderView(embeddedTView, embeddedLView, context);\n                return new ViewRef(embeddedLView);\n            }\n        };\n    }\n    if (hostTNode.type === 0 /* Container */) {\n        ngDevMode && assertDefined(hostTNode.tViews, 'TView must be allocated');\n        return new R3TemplateRef(hostView, hostTNode, createElementRef(ElementRefToken, hostTNode, hostView));\n    }\n    else {\n        return null;\n    }\n}\nlet R3ViewContainerRef;\n/**\n * Creates a ViewContainerRef and stores it on the injector. Or, if the ViewContainerRef\n * already exists, retrieves the existing ViewContainerRef.\n *\n * @returns The ViewContainerRef instance to use\n */\nfunction injectViewContainerRef(ViewContainerRefToken, ElementRefToken) {\n    const previousTNode = getPreviousOrParentTNode();\n    return createContainerRef(ViewContainerRefToken, ElementRefToken, previousTNode, getLView());\n}\n/**\n * Creates a ViewContainerRef and stores it on the injector.\n *\n * @param ViewContainerRefToken The ViewContainerRef type\n * @param ElementRefToken The ElementRef type\n * @param hostTNode The node that is requesting a ViewContainerRef\n * @param hostView The view to which the node belongs\n * @returns The ViewContainerRef instance to use\n */\nfunction createContainerRef(ViewContainerRefToken, ElementRefToken, hostTNode, hostView) {\n    if (!R3ViewContainerRef) {\n        R3ViewContainerRef = class ViewContainerRef extends ViewContainerRefToken {\n            constructor(_lContainer, _hostTNode, _hostView) {\n                super();\n                this._lContainer = _lContainer;\n                this._hostTNode = _hostTNode;\n                this._hostView = _hostView;\n            }\n            get element() {\n                return createElementRef(ElementRefToken, this._hostTNode, this._hostView);\n            }\n            get injector() {\n                return new NodeInjector(this._hostTNode, this._hostView);\n            }\n            /** @deprecated No replacement */\n            get parentInjector() {\n                const parentLocation = getParentInjectorLocation(this._hostTNode, this._hostView);\n                const parentView = getParentInjectorView(parentLocation, this._hostView);\n                const parentTNode = getParentInjectorTNode(parentLocation, this._hostView, this._hostTNode);\n                return !hasParentInjector(parentLocation) || parentTNode == null ?\n                    new NodeInjector(null, this._hostView) :\n                    new NodeInjector(parentTNode, parentView);\n            }\n            clear() {\n                while (this.length > 0) {\n                    this.remove(this.length - 1);\n                }\n            }\n            get(index) {\n                return this._lContainer[VIEW_REFS] !== null && this._lContainer[VIEW_REFS][index] || null;\n            }\n            get length() {\n                return this._lContainer.length - CONTAINER_HEADER_OFFSET;\n            }\n            createEmbeddedView(templateRef, context, index) {\n                const viewRef = templateRef.createEmbeddedView(context || {});\n                this.insert(viewRef, index);\n                return viewRef;\n            }\n            createComponent(componentFactory, index, injector, projectableNodes, ngModuleRef) {\n                const contextInjector = injector || this.parentInjector;\n                if (!ngModuleRef && componentFactory.ngModule == null && contextInjector) {\n                    // DO NOT REFACTOR. The code here used to have a `value || undefined` expression\n                    // which seems to cause internal google apps to fail. This is documented in the\n                    // following internal bug issue: go/b/142967802\n                    const result = contextInjector.get(NgModuleRef, null);\n                    if (result) {\n                        ngModuleRef = result;\n                    }\n                }\n                const componentRef = componentFactory.create(contextInjector, projectableNodes, undefined, ngModuleRef);\n                this.insert(componentRef.hostView, index);\n                return componentRef;\n            }\n            insert(viewRef, index) {\n                const lView = viewRef._lView;\n                const tView = lView[TVIEW];\n                if (viewRef.destroyed) {\n                    throw new Error('Cannot insert a destroyed View in a ViewContainer!');\n                }\n                this.allocateContainerIfNeeded();\n                if (viewAttachedToContainer(lView)) {\n                    // If view is already attached, detach it first so we clean up references appropriately.\n                    const prevIdx = this.indexOf(viewRef);\n                    // A view might be attached either to this or a different container. The `prevIdx` for\n                    // those cases will be:\n                    // equal to -1 for views attached to this ViewContainerRef\n                    // >= 0 for views attached to a different ViewContainerRef\n                    if (prevIdx !== -1) {\n                        this.detach(prevIdx);\n                    }\n                    else {\n                        const prevLContainer = lView[PARENT];\n                        ngDevMode &&\n                            assertEqual(isLContainer(prevLContainer), true, 'An attached view should have its PARENT point to a container.');\n                        // We need to re-create a R3ViewContainerRef instance since those are not stored on\n                        // LView (nor anywhere else).\n                        const prevVCRef = new R3ViewContainerRef(prevLContainer, prevLContainer[T_HOST], prevLContainer[PARENT]);\n                        prevVCRef.detach(prevVCRef.indexOf(viewRef));\n                    }\n                }\n                const adjustedIdx = this._adjustIndex(index);\n                insertView(tView, lView, this._lContainer, adjustedIdx);\n                const beforeNode = getBeforeNodeForView(adjustedIdx, this._lContainer);\n                addRemoveViewFromContainer(tView, lView, true, beforeNode);\n                viewRef.attachToViewContainerRef(this);\n                addToArray(this._lContainer[VIEW_REFS], adjustedIdx, viewRef);\n                return viewRef;\n            }\n            move(viewRef, newIndex) {\n                if (viewRef.destroyed) {\n                    throw new Error('Cannot move a destroyed View in a ViewContainer!');\n                }\n                return this.insert(viewRef, newIndex);\n            }\n            indexOf(viewRef) {\n                const viewRefsArr = this._lContainer[VIEW_REFS];\n                return viewRefsArr !== null ? viewRefsArr.indexOf(viewRef) : -1;\n            }\n            remove(index) {\n                this.allocateContainerIfNeeded();\n                const adjustedIdx = this._adjustIndex(index, -1);\n                const detachedView = detachView(this._lContainer, adjustedIdx);\n                if (detachedView) {\n                    // Before destroying the view, remove it from the container's array of `ViewRef`s.\n                    // This ensures the view container length is updated before calling\n                    // `destroyLView`, which could recursively call view container methods that\n                    // rely on an accurate container length.\n                    // (e.g. a method on this view container being called by a child directive's OnDestroy\n                    // lifecycle hook)\n                    removeFromArray(this._lContainer[VIEW_REFS], adjustedIdx);\n                    destroyLView(detachedView[TVIEW], detachedView);\n                }\n            }\n            detach(index) {\n                this.allocateContainerIfNeeded();\n                const adjustedIdx = this._adjustIndex(index, -1);\n                const view = detachView(this._lContainer, adjustedIdx);\n                const wasDetached = view && removeFromArray(this._lContainer[VIEW_REFS], adjustedIdx) != null;\n                return wasDetached ? new ViewRef(view) : null;\n            }\n            _adjustIndex(index, shift = 0) {\n                if (index == null) {\n                    return this.length + shift;\n                }\n                if (ngDevMode) {\n                    assertGreaterThan(index, -1, `ViewRef index must be positive, got ${index}`);\n                    // +1 because it's legal to insert at the end.\n                    assertLessThan(index, this.length + 1 + shift, 'index');\n                }\n                return index;\n            }\n            allocateContainerIfNeeded() {\n                if (this._lContainer[VIEW_REFS] === null) {\n                    this._lContainer[VIEW_REFS] = [];\n                }\n            }\n        };\n    }\n    ngDevMode &&\n        assertNodeOfPossibleTypes(hostTNode, [0 /* Container */, 3 /* Element */, 4 /* ElementContainer */]);\n    let lContainer;\n    const slotValue = hostView[hostTNode.index];\n    if (isLContainer(slotValue)) {\n        // If the host is a container, we don't need to create a new LContainer\n        lContainer = slotValue;\n    }\n    else {\n        let commentNode;\n        // If the host is an element container, the native host element is guaranteed to be a\n        // comment and we can reuse that comment as anchor element for the new LContainer.\n        // The comment node in question is already part of the DOM structure so we don't need to append\n        // it again.\n        if (hostTNode.type === 4 /* ElementContainer */) {\n            commentNode = unwrapRNode(slotValue);\n        }\n        else {\n            ngDevMode && ngDevMode.rendererCreateComment++;\n            commentNode = hostView[RENDERER].createComment(ngDevMode ? 'container' : '');\n            // A `ViewContainerRef` can be injected by the root (topmost / bootstrapped) component. In\n            // this case we can't use TView / TNode data structures to insert container's marker node\n            // (both a parent of a comment node and the comment node itself are not part of any view). In\n            // this specific case we use low-level DOM manipulation to insert container's marker (comment)\n            // node.\n            if (isRootView(hostView)) {\n                const renderer = hostView[RENDERER];\n                const hostNative = getNativeByTNode(hostTNode, hostView);\n                const parentOfHostNative = nativeParentNode(renderer, hostNative);\n                nativeInsertBefore(renderer, parentOfHostNative, commentNode, nativeNextSibling(renderer, hostNative));\n            }\n            else {\n                appendChild(hostView[TVIEW], hostView, commentNode, hostTNode);\n            }\n        }\n        hostView[hostTNode.index] = lContainer =\n            createLContainer(slotValue, hostView, commentNode, hostTNode);\n        addToViewTree(hostView, lContainer);\n    }\n    return new R3ViewContainerRef(lContainer, hostTNode, hostView);\n}\n/** Returns a ChangeDetectorRef (a.k.a. a ViewRef) */\nfunction injectChangeDetectorRef(isPipe = false) {\n    return createViewRef(getPreviousOrParentTNode(), getLView(), isPipe);\n}\n/**\n * Creates a ViewRef and stores it on the injector as ChangeDetectorRef (public alias).\n *\n * @param tNode The node that is requesting a ChangeDetectorRef\n * @param lView The view to which the node belongs\n * @param isPipe Whether the view is being injected into a pipe.\n * @returns The ChangeDetectorRef to use\n */\nfunction createViewRef(tNode, lView, isPipe) {\n    // `isComponentView` will be true for Component and Directives (but not for Pipes).\n    // See https://github.com/angular/angular/pull/33072 for proper fix\n    const isComponentView = !isPipe && isComponentHost(tNode);\n    if (isComponentView) {\n        // The LView represents the location where the component is declared.\n        // Instead we want the LView for the component View and so we need to look it up.\n        const componentView = getComponentLViewByIndex(tNode.index, lView); // look down\n        return new ViewRef(componentView, componentView);\n    }\n    else if (tNode.type === 3 /* Element */ || tNode.type === 0 /* Container */ ||\n        tNode.type === 4 /* ElementContainer */ || tNode.type === 5 /* IcuContainer */) {\n        // The LView represents the location where the injection is requested from.\n        // We need to locate the containing LView (in case where the `lView` is an embedded view)\n        const hostComponentView = lView[DECLARATION_COMPONENT_VIEW]; // look up\n        return new ViewRef(hostComponentView, lView);\n    }\n    return null;\n}\n/** Returns a Renderer2 (or throws when application was bootstrapped with Renderer3) */\nfunction getOrCreateRenderer2(view) {\n    const renderer = view[RENDERER];\n    if (isProceduralRenderer(renderer)) {\n        return renderer;\n    }\n    else {\n        throw new Error('Cannot inject Renderer2 when the application uses Renderer3!');\n    }\n}\n/** Injects a Renderer2 for the current component. */\nfunction injectRenderer2() {\n    // We need the Renderer to be based on the component that it's being injected into, however since\n    // DI happens before we've entered its view, `getLView` will return the parent view instead.\n    const lView = getLView();\n    const tNode = getPreviousOrParentTNode();\n    const nodeAtIndex = getComponentLViewByIndex(tNode.index, lView);\n    return getOrCreateRenderer2(isLView(nodeAtIndex) ? nodeAtIndex : lView);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Base class that provides change detection functionality.\n * A change-detection tree collects all views that are to be checked for changes.\n * Use the methods to add and remove views from the tree, initiate change-detection,\n * and explicitly mark views as _dirty_, meaning that they have changed and need to be re-rendered.\n *\n * @see [Using change detection hooks](guide/lifecycle-hooks#using-change-detection-hooks)\n * @see [Defining custom change detection](guide/lifecycle-hooks#defining-custom-change-detection)\n *\n * @usageNotes\n *\n * The following examples demonstrate how to modify default change-detection behavior\n * to perform explicit detection when needed.\n *\n * ### Use `markForCheck()` with `CheckOnce` strategy\n *\n * The following example sets the `OnPush` change-detection strategy for a component\n * (`CheckOnce`, rather than the default `CheckAlways`), then forces a second check\n * after an interval. See [live demo](http://plnkr.co/edit/GC512b?p=preview).\n *\n * <code-example path=\"core/ts/change_detect/change-detection.ts\"\n * region=\"mark-for-check\"></code-example>\n *\n * ### Detach change detector to limit how often check occurs\n *\n * The following example defines a component with a large list of read-only data\n * that is expected to change constantly, many times per second.\n * To improve performance, we want to check and update the list\n * less often than the changes actually occur. To do that, we detach\n * the component's change detector and perform an explicit local check every five seconds.\n *\n * <code-example path=\"core/ts/change_detect/change-detection.ts\" region=\"detach\"></code-example>\n *\n *\n * ### Reattaching a detached component\n *\n * The following example creates a component displaying live data.\n * The component detaches its change detector from the main change detector tree\n * when the `live` property is set to false, and reattaches it when the property\n * becomes true.\n *\n * <code-example path=\"core/ts/change_detect/change-detection.ts\" region=\"reattach\"></code-example>\n *\n * @publicApi\n */\nclass ChangeDetectorRef {\n}\n/**\n * @internal\n * @nocollapse\n */\nChangeDetectorRef.__NG_ELEMENT_ID__ = () => SWITCH_CHANGE_DETECTOR_REF_FACTORY();\nconst SWITCH_CHANGE_DETECTOR_REF_FACTORY__POST_R3__ = injectChangeDetectorRef;\nconst SWITCH_CHANGE_DETECTOR_REF_FACTORY__PRE_R3__ = (...args) => { };\nconst ɵ0$5 = SWITCH_CHANGE_DETECTOR_REF_FACTORY__POST_R3__;\nconst SWITCH_CHANGE_DETECTOR_REF_FACTORY = SWITCH_CHANGE_DETECTOR_REF_FACTORY__POST_R3__;\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * @description\n *\n * Represents a type that a Component or other object is instances of.\n *\n * An example of a `Type` is `MyCustomComponent` class, which in JavaScript is represented by\n * the `MyCustomComponent` constructor function.\n *\n * @publicApi\n */\nconst Type = Function;\nfunction isType(v) {\n    return typeof v === 'function';\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/*\n * #########################\n * Attention: These Regular expressions have to hold even if the code is minified!\n * ##########################\n */\n/**\n * Regular expression that detects pass-through constructors for ES5 output. This Regex\n * intends to capture the common delegation pattern emitted by TypeScript and Babel. Also\n * it intends to capture the pattern where existing constructors have been downleveled from\n * ES2015 to ES5 using TypeScript w/ downlevel iteration. e.g.\n *\n * ```\n *   function MyClass() {\n *     var _this = _super.apply(this, arguments) || this;\n * ```\n *\n * ```\n *   function MyClass() {\n *     var _this = _super.apply(this, __spread(arguments)) || this;\n * ```\n *\n * More details can be found in: https://github.com/angular/angular/issues/38453.\n */\nconst ES5_DELEGATE_CTOR = /^function\\s+\\S+\\(\\)\\s*{[\\s\\S]+\\.apply\\(this,\\s*(arguments|[^()]+\\(arguments\\))\\)/;\n/** Regular expression that detects ES2015 classes which extend from other classes. */\nconst ES2015_INHERITED_CLASS = /^class\\s+[A-Za-z\\d$_]*\\s*extends\\s+[^{]+{/;\n/**\n * Regular expression that detects ES2015 classes which extend from other classes and\n * have an explicit constructor defined.\n */\nconst ES2015_INHERITED_CLASS_WITH_CTOR = /^class\\s+[A-Za-z\\d$_]*\\s*extends\\s+[^{]+{[\\s\\S]*constructor\\s*\\(/;\n/**\n * Regular expression that detects ES2015 classes which extend from other classes\n * and inherit a constructor.\n */\nconst ES2015_INHERITED_CLASS_WITH_DELEGATE_CTOR = /^class\\s+[A-Za-z\\d$_]*\\s*extends\\s+[^{]+{[\\s\\S]*constructor\\s*\\(\\)\\s*{\\s*super\\(\\.\\.\\.arguments\\)/;\n/**\n * Determine whether a stringified type is a class which delegates its constructor\n * to its parent.\n *\n * This is not trivial since compiled code can actually contain a constructor function\n * even if the original source code did not. For instance, when the child class contains\n * an initialized instance property.\n */\nfunction isDelegateCtor(typeStr) {\n    return ES5_DELEGATE_CTOR.test(typeStr) ||\n        ES2015_INHERITED_CLASS_WITH_DELEGATE_CTOR.test(typeStr) ||\n        (ES2015_INHERITED_CLASS.test(typeStr) && !ES2015_INHERITED_CLASS_WITH_CTOR.test(typeStr));\n}\nclass ReflectionCapabilities {\n    constructor(reflect) {\n        this._reflect = reflect || _global['Reflect'];\n    }\n    isReflectionEnabled() {\n        return true;\n    }\n    factory(t) {\n        return (...args) => new t(...args);\n    }\n    /** @internal */\n    _zipTypesAndAnnotations(paramTypes, paramAnnotations) {\n        let result;\n        if (typeof paramTypes === 'undefined') {\n            result = newArray(paramAnnotations.length);\n        }\n        else {\n            result = newArray(paramTypes.length);\n        }\n        for (let i = 0; i < result.length; i++) {\n            // TS outputs Object for parameters without types, while Traceur omits\n            // the annotations. For now we preserve the Traceur behavior to aid\n            // migration, but this can be revisited.\n            if (typeof paramTypes === 'undefined') {\n                result[i] = [];\n            }\n            else if (paramTypes[i] && paramTypes[i] != Object) {\n                result[i] = [paramTypes[i]];\n            }\n            else {\n                result[i] = [];\n            }\n            if (paramAnnotations && paramAnnotations[i] != null) {\n                result[i] = result[i].concat(paramAnnotations[i]);\n            }\n        }\n        return result;\n    }\n    _ownParameters(type, parentCtor) {\n        const typeStr = type.toString();\n        // If we have no decorators, we only have function.length as metadata.\n        // In that case, to detect whether a child class declared an own constructor or not,\n        // we need to look inside of that constructor to check whether it is\n        // just calling the parent.\n        // This also helps to work around for https://github.com/Microsoft/TypeScript/issues/12439\n        // that sets 'design:paramtypes' to []\n        // if a class inherits from another class but has no ctor declared itself.\n        if (isDelegateCtor(typeStr)) {\n            return null;\n        }\n        // Prefer the direct API.\n        if (type.parameters && type.parameters !== parentCtor.parameters) {\n            return type.parameters;\n        }\n        // API of tsickle for lowering decorators to properties on the class.\n        const tsickleCtorParams = type.ctorParameters;\n        if (tsickleCtorParams && tsickleCtorParams !== parentCtor.ctorParameters) {\n            // Newer tsickle uses a function closure\n            // Retain the non-function case for compatibility with older tsickle\n            const ctorParameters = typeof tsickleCtorParams === 'function' ? tsickleCtorParams() : tsickleCtorParams;\n            const paramTypes = ctorParameters.map((ctorParam) => ctorParam && ctorParam.type);\n            const paramAnnotations = ctorParameters.map((ctorParam) => ctorParam && convertTsickleDecoratorIntoMetadata(ctorParam.decorators));\n            return this._zipTypesAndAnnotations(paramTypes, paramAnnotations);\n        }\n        // API for metadata created by invoking the decorators.\n        const paramAnnotations = type.hasOwnProperty(PARAMETERS) && type[PARAMETERS];\n        const paramTypes = this._reflect && this._reflect.getOwnMetadata &&\n            this._reflect.getOwnMetadata('design:paramtypes', type);\n        if (paramTypes || paramAnnotations) {\n            return this._zipTypesAndAnnotations(paramTypes, paramAnnotations);\n        }\n        // If a class has no decorators, at least create metadata\n        // based on function.length.\n        // Note: We know that this is a real constructor as we checked\n        // the content of the constructor above.\n        return newArray(type.length);\n    }\n    parameters(type) {\n        // Note: only report metadata if we have at least one class decorator\n        // to stay in sync with the static reflector.\n        if (!isType(type)) {\n            return [];\n        }\n        const parentCtor = getParentCtor(type);\n        let parameters = this._ownParameters(type, parentCtor);\n        if (!parameters && parentCtor !== Object) {\n            parameters = this.parameters(parentCtor);\n        }\n        return parameters || [];\n    }\n    _ownAnnotations(typeOrFunc, parentCtor) {\n        // Prefer the direct API.\n        if (typeOrFunc.annotations && typeOrFunc.annotations !== parentCtor.annotations) {\n            let annotations = typeOrFunc.annotations;\n            if (typeof annotations === 'function' && annotations.annotations) {\n                annotations = annotations.annotations;\n            }\n            return annotations;\n        }\n        // API of tsickle for lowering decorators to properties on the class.\n        if (typeOrFunc.decorators && typeOrFunc.decorators !== parentCtor.decorators) {\n            return convertTsickleDecoratorIntoMetadata(typeOrFunc.decorators);\n        }\n        // API for metadata created by invoking the decorators.\n        if (typeOrFunc.hasOwnProperty(ANNOTATIONS)) {\n            return typeOrFunc[ANNOTATIONS];\n        }\n        return null;\n    }\n    annotations(typeOrFunc) {\n        if (!isType(typeOrFunc)) {\n            return [];\n        }\n        const parentCtor = getParentCtor(typeOrFunc);\n        const ownAnnotations = this._ownAnnotations(typeOrFunc, parentCtor) || [];\n        const parentAnnotations = parentCtor !== Object ? this.annotations(parentCtor) : [];\n        return parentAnnotations.concat(ownAnnotations);\n    }\n    _ownPropMetadata(typeOrFunc, parentCtor) {\n        // Prefer the direct API.\n        if (typeOrFunc.propMetadata &&\n            typeOrFunc.propMetadata !== parentCtor.propMetadata) {\n            let propMetadata = typeOrFunc.propMetadata;\n            if (typeof propMetadata === 'function' && propMetadata.propMetadata) {\n                propMetadata = propMetadata.propMetadata;\n            }\n            return propMetadata;\n        }\n        // API of tsickle for lowering decorators to properties on the class.\n        if (typeOrFunc.propDecorators &&\n            typeOrFunc.propDecorators !== parentCtor.propDecorators) {\n            const propDecorators = typeOrFunc.propDecorators;\n            const propMetadata = {};\n            Object.keys(propDecorators).forEach(prop => {\n                propMetadata[prop] = convertTsickleDecoratorIntoMetadata(propDecorators[prop]);\n            });\n            return propMetadata;\n        }\n        // API for metadata created by invoking the decorators.\n        if (typeOrFunc.hasOwnProperty(PROP_METADATA)) {\n            return typeOrFunc[PROP_METADATA];\n        }\n        return null;\n    }\n    propMetadata(typeOrFunc) {\n        if (!isType(typeOrFunc)) {\n            return {};\n        }\n        const parentCtor = getParentCtor(typeOrFunc);\n        const propMetadata = {};\n        if (parentCtor !== Object) {\n            const parentPropMetadata = this.propMetadata(parentCtor);\n            Object.keys(parentPropMetadata).forEach((propName) => {\n                propMetadata[propName] = parentPropMetadata[propName];\n            });\n        }\n        const ownPropMetadata = this._ownPropMetadata(typeOrFunc, parentCtor);\n        if (ownPropMetadata) {\n            Object.keys(ownPropMetadata).forEach((propName) => {\n                const decorators = [];\n                if (propMetadata.hasOwnProperty(propName)) {\n                    decorators.push(...propMetadata[propName]);\n                }\n                decorators.push(...ownPropMetadata[propName]);\n                propMetadata[propName] = decorators;\n            });\n        }\n        return propMetadata;\n    }\n    ownPropMetadata(typeOrFunc) {\n        if (!isType(typeOrFunc)) {\n            return {};\n        }\n        return this._ownPropMetadata(typeOrFunc, getParentCtor(typeOrFunc)) || {};\n    }\n    hasLifecycleHook(type, lcProperty) {\n        return type instanceof Type && lcProperty in type.prototype;\n    }\n    guards(type) {\n        return {};\n    }\n    getter(name) {\n        return new Function('o', 'return o.' + name + ';');\n    }\n    setter(name) {\n        return new Function('o', 'v', 'return o.' + name + ' = v;');\n    }\n    method(name) {\n        const functionBody = `if (!o.${name}) throw new Error('\"${name}\" is undefined');\n        return o.${name}.apply(o, args);`;\n        return new Function('o', 'args', functionBody);\n    }\n    // There is not a concept of import uri in Js, but this is useful in developing Dart applications.\n    importUri(type) {\n        // StaticSymbol\n        if (typeof type === 'object' && type['filePath']) {\n            return type['filePath'];\n        }\n        // Runtime type\n        return `./${stringify(type)}`;\n    }\n    resourceUri(type) {\n        return `./${stringify(type)}`;\n    }\n    resolveIdentifier(name, moduleUrl, members, runtime) {\n        return runtime;\n    }\n    resolveEnum(enumIdentifier, name) {\n        return enumIdentifier[name];\n    }\n}\nfunction convertTsickleDecoratorIntoMetadata(decoratorInvocations) {\n    if (!decoratorInvocations) {\n        return [];\n    }\n    return decoratorInvocations.map(decoratorInvocation => {\n        const decoratorType = decoratorInvocation.type;\n        const annotationCls = decoratorType.annotationCls;\n        const annotationArgs = decoratorInvocation.args ? decoratorInvocation.args : [];\n        return new annotationCls(...annotationArgs);\n    });\n}\nfunction getParentCtor(ctor) {\n    const parentProto = ctor.prototype ? Object.getPrototypeOf(ctor.prototype) : null;\n    const parentCtor = parentProto ? parentProto.constructor : null;\n    // Note: We always use `Object` as the null value\n    // to simplify checking later on.\n    return parentCtor || Object;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nlet _reflect = null;\nfunction getReflect() {\n    return (_reflect = _reflect || new ReflectionCapabilities());\n}\nfunction reflectDependencies(type) {\n    return convertDependencies(getReflect().parameters(type));\n}\nfunction convertDependencies(deps) {\n    const compiler = getCompilerFacade();\n    return deps.map(dep => reflectDependency(compiler, dep));\n}\nfunction reflectDependency(compiler, dep) {\n    const meta = {\n        token: null,\n        host: false,\n        optional: false,\n        resolved: compiler.R3ResolvedDependencyType.Token,\n        self: false,\n        skipSelf: false,\n    };\n    function setTokenAndResolvedType(token) {\n        meta.resolved = compiler.R3ResolvedDependencyType.Token;\n        meta.token = token;\n    }\n    if (Array.isArray(dep) && dep.length > 0) {\n        for (let j = 0; j < dep.length; j++) {\n            const param = dep[j];\n            if (param === undefined) {\n                // param may be undefined if type of dep is not set by ngtsc\n                continue;\n            }\n            const proto = Object.getPrototypeOf(param);\n            if (param instanceof Optional || proto.ngMetadataName === 'Optional') {\n                meta.optional = true;\n            }\n            else if (param instanceof SkipSelf || proto.ngMetadataName === 'SkipSelf') {\n                meta.skipSelf = true;\n            }\n            else if (param instanceof Self || proto.ngMetadataName === 'Self') {\n                meta.self = true;\n            }\n            else if (param instanceof Host || proto.ngMetadataName === 'Host') {\n                meta.host = true;\n            }\n            else if (param instanceof Inject) {\n                meta.token = param.token;\n            }\n            else if (param instanceof Attribute) {\n                if (param.attributeName === undefined) {\n                    throw new Error(`Attribute name must be defined.`);\n                }\n                meta.token = param.attributeName;\n                meta.resolved = compiler.R3ResolvedDependencyType.Attribute;\n            }\n            else if (param === ChangeDetectorRef) {\n                meta.token = param;\n                meta.resolved = compiler.R3ResolvedDependencyType.ChangeDetectorRef;\n            }\n            else {\n                setTokenAndResolvedType(param);\n            }\n        }\n    }\n    else if (dep === undefined || (Array.isArray(dep) && dep.length === 0)) {\n        meta.token = undefined;\n        meta.resolved = R3ResolvedDependencyType.Invalid;\n    }\n    else {\n        setTokenAndResolvedType(dep);\n    }\n    return meta;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Compile an Angular injectable according to its `Injectable` metadata, and patch the resulting\n * injectable def (`ɵprov`) onto the injectable type.\n */\nfunction compileInjectable(type, srcMeta) {\n    let ngInjectableDef = null;\n    let ngFactoryDef = null;\n    // if NG_PROV_DEF is already defined on this class then don't overwrite it\n    if (!type.hasOwnProperty(NG_PROV_DEF)) {\n        Object.defineProperty(type, NG_PROV_DEF, {\n            get: () => {\n                if (ngInjectableDef === null) {\n                    ngInjectableDef = getCompilerFacade().compileInjectable(angularCoreDiEnv, `ng:///${type.name}/ɵprov.js`, getInjectableMetadata(type, srcMeta));\n                }\n                return ngInjectableDef;\n            },\n        });\n        // On IE10 properties defined via `defineProperty` won't be inherited by child classes,\n        // which will break inheriting the injectable definition from a grandparent through an\n        // undecorated parent class. We work around it by defining a method which should be used\n        // as a fallback. This should only be a problem in JIT mode, because in AOT TypeScript\n        // seems to have a workaround for static properties. When inheriting from an undecorated\n        // parent is no longer supported (v11 or later), this can safely be removed.\n        if (!type.hasOwnProperty(NG_PROV_DEF_FALLBACK)) {\n            type[NG_PROV_DEF_FALLBACK] = () => type[NG_PROV_DEF];\n        }\n    }\n    // if NG_FACTORY_DEF is already defined on this class then don't overwrite it\n    if (!type.hasOwnProperty(NG_FACTORY_DEF)) {\n        Object.defineProperty(type, NG_FACTORY_DEF, {\n            get: () => {\n                if (ngFactoryDef === null) {\n                    const metadata = getInjectableMetadata(type, srcMeta);\n                    const compiler = getCompilerFacade();\n                    ngFactoryDef = compiler.compileFactory(angularCoreDiEnv, `ng:///${type.name}/ɵfac.js`, {\n                        name: metadata.name,\n                        type: metadata.type,\n                        typeArgumentCount: metadata.typeArgumentCount,\n                        deps: reflectDependencies(type),\n                        injectFn: 'inject',\n                        target: compiler.R3FactoryTarget.Injectable\n                    });\n                }\n                return ngFactoryDef;\n            },\n            // Leave this configurable so that the factories from directives or pipes can take precedence.\n            configurable: true\n        });\n    }\n}\nconst ɵ0$6 = getClosureSafeProperty;\nconst USE_VALUE$1 = getClosureSafeProperty({ provide: String, useValue: ɵ0$6 });\nfunction isUseClassProvider(meta) {\n    return meta.useClass !== undefined;\n}\nfunction isUseValueProvider(meta) {\n    return USE_VALUE$1 in meta;\n}\nfunction isUseFactoryProvider(meta) {\n    return meta.useFactory !== undefined;\n}\nfunction isUseExistingProvider(meta) {\n    return meta.useExisting !== undefined;\n}\nfunction getInjectableMetadata(type, srcMeta) {\n    // Allow the compilation of a class with a `@Injectable()` decorator without parameters\n    const meta = srcMeta || { providedIn: null };\n    const compilerMeta = {\n        name: type.name,\n        type: type,\n        typeArgumentCount: 0,\n        providedIn: meta.providedIn,\n        userDeps: undefined,\n    };\n    if ((isUseClassProvider(meta) || isUseFactoryProvider(meta)) && meta.deps !== undefined) {\n        compilerMeta.userDeps = convertDependencies(meta.deps);\n    }\n    if (isUseClassProvider(meta)) {\n        // The user explicitly specified useClass, and may or may not have provided deps.\n        compilerMeta.useClass = resolveForwardRef(meta.useClass);\n    }\n    else if (isUseValueProvider(meta)) {\n        // The user explicitly specified useValue.\n        compilerMeta.useValue = resolveForwardRef(meta.useValue);\n    }\n    else if (isUseFactoryProvider(meta)) {\n        // The user explicitly specified useFactory.\n        compilerMeta.useFactory = meta.useFactory;\n    }\n    else if (isUseExistingProvider(meta)) {\n        // The user explicitly specified useExisting.\n        compilerMeta.useExisting = resolveForwardRef(meta.useExisting);\n    }\n    return compilerMeta;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst ɵ0$7 = getClosureSafeProperty;\nconst USE_VALUE$2 = getClosureSafeProperty({ provide: String, useValue: ɵ0$7 });\nconst EMPTY_ARRAY$1 = [];\nfunction convertInjectableProviderToFactory(type, provider) {\n    if (!provider) {\n        const reflectionCapabilities = new ReflectionCapabilities();\n        const deps = reflectionCapabilities.parameters(type);\n        // TODO - convert to flags.\n        return () => new type(...injectArgs(deps));\n    }\n    if (USE_VALUE$2 in provider) {\n        const valueProvider = provider;\n        return () => valueProvider.useValue;\n    }\n    else if (provider.useExisting) {\n        const existingProvider = provider;\n        return () => ɵɵinject(resolveForwardRef(existingProvider.useExisting));\n    }\n    else if (provider.useFactory) {\n        const factoryProvider = provider;\n        return () => factoryProvider.useFactory(...injectArgs(factoryProvider.deps || EMPTY_ARRAY$1));\n    }\n    else if (provider.useClass) {\n        const classProvider = provider;\n        let deps = provider.deps;\n        if (!deps) {\n            const reflectionCapabilities = new ReflectionCapabilities();\n            deps = reflectionCapabilities.parameters(type);\n        }\n        return () => new (resolveForwardRef(classProvider.useClass))(...injectArgs(deps));\n    }\n    else {\n        let deps = provider.deps;\n        if (!deps) {\n            const reflectionCapabilities = new ReflectionCapabilities();\n            deps = reflectionCapabilities.parameters(type);\n        }\n        return () => new type(...injectArgs(deps));\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst ɵ0$8 = (type, meta) => SWITCH_COMPILE_INJECTABLE(type, meta);\n/**\n * Injectable decorator and metadata.\n *\n * @Annotation\n * @publicApi\n */\nconst Injectable = makeDecorator('Injectable', undefined, undefined, undefined, ɵ0$8);\n/**\n * Supports @Injectable() in JIT mode for Render2.\n */\nfunction render2CompileInjectable(injectableType, options) {\n    if (options && options.providedIn !== undefined && !getInjectableDef(injectableType)) {\n        injectableType.ɵprov = ɵɵdefineInjectable({\n            token: injectableType,\n            providedIn: options.providedIn,\n            factory: convertInjectableProviderToFactory(injectableType, options),\n        });\n    }\n}\nconst SWITCH_COMPILE_INJECTABLE__POST_R3__ = compileInjectable;\nconst SWITCH_COMPILE_INJECTABLE__PRE_R3__ = render2CompileInjectable;\nconst SWITCH_COMPILE_INJECTABLE = SWITCH_COMPILE_INJECTABLE__POST_R3__;\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * An internal token whose presence in an injector indicates that the injector should treat itself\n * as a root scoped injector when processing requests for unknown tokens which may indicate\n * they are provided in the root scope.\n */\nconst INJECTOR_SCOPE = new InjectionToken('Set Injector scope.');\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Marker which indicates that a value has not yet been created from the factory function.\n */\nconst NOT_YET = {};\n/**\n * Marker which indicates that the factory function for a token is in the process of being called.\n *\n * If the injector is asked to inject a token with its value set to CIRCULAR, that indicates\n * injection of a dependency has recursively attempted to inject the original token, and there is\n * a circular dependency among the providers.\n */\nconst CIRCULAR = {};\nconst EMPTY_ARRAY$2 = [];\n/**\n * A lazily initialized NullInjector.\n */\nlet NULL_INJECTOR = undefined;\nfunction getNullInjector() {\n    if (NULL_INJECTOR === undefined) {\n        NULL_INJECTOR = new NullInjector();\n    }\n    return NULL_INJECTOR;\n}\n/**\n * Create a new `Injector` which is configured using a `defType` of `InjectorType<any>`s.\n *\n * @publicApi\n */\nfunction createInjector(defType, parent = null, additionalProviders = null, name) {\n    const injector = createInjectorWithoutInjectorInstances(defType, parent, additionalProviders, name);\n    injector._resolveInjectorDefTypes();\n    return injector;\n}\n/**\n * Creates a new injector without eagerly resolving its injector types. Can be used in places\n * where resolving the injector types immediately can lead to an infinite loop. The injector types\n * should be resolved at a later point by calling `_resolveInjectorDefTypes`.\n */\nfunction createInjectorWithoutInjectorInstances(defType, parent = null, additionalProviders = null, name) {\n    return new R3Injector(defType, additionalProviders, parent || getNullInjector(), name);\n}\nclass R3Injector {\n    constructor(def, additionalProviders, parent, source = null) {\n        this.parent = parent;\n        /**\n         * Map of tokens to records which contain the instances of those tokens.\n         * - `null` value implies that we don't have the record. Used by tree-shakable injectors\n         * to prevent further searches.\n         */\n        this.records = new Map();\n        /**\n         * The transitive set of `InjectorType`s which define this injector.\n         */\n        this.injectorDefTypes = new Set();\n        /**\n         * Set of values instantiated by this injector which contain `ngOnDestroy` lifecycle hooks.\n         */\n        this.onDestroy = new Set();\n        this._destroyed = false;\n        const dedupStack = [];\n        // Start off by creating Records for every provider declared in every InjectorType\n        // included transitively in additional providers then do the same for `def`. This order is\n        // important because `def` may include providers that override ones in additionalProviders.\n        additionalProviders &&\n            deepForEach(additionalProviders, provider => this.processProvider(provider, def, additionalProviders));\n        deepForEach([def], injectorDef => this.processInjectorType(injectorDef, [], dedupStack));\n        // Make sure the INJECTOR token provides this injector.\n        this.records.set(INJECTOR, makeRecord(undefined, this));\n        // Detect whether this injector has the APP_ROOT_SCOPE token and thus should provide\n        // any injectable scoped to APP_ROOT_SCOPE.\n        const record = this.records.get(INJECTOR_SCOPE);\n        this.scope = record != null ? record.value : null;\n        // Source name, used for debugging\n        this.source = source || (typeof def === 'object' ? null : stringify(def));\n    }\n    /**\n     * Flag indicating that this injector was previously destroyed.\n     */\n    get destroyed() {\n        return this._destroyed;\n    }\n    /**\n     * Destroy the injector and release references to every instance or provider associated with it.\n     *\n     * Also calls the `OnDestroy` lifecycle hooks of every instance that was created for which a\n     * hook was found.\n     */\n    destroy() {\n        this.assertNotDestroyed();\n        // Set destroyed = true first, in case lifecycle hooks re-enter destroy().\n        this._destroyed = true;\n        try {\n            // Call all the lifecycle hooks.\n            this.onDestroy.forEach(service => service.ngOnDestroy());\n        }\n        finally {\n            // Release all references.\n            this.records.clear();\n            this.onDestroy.clear();\n            this.injectorDefTypes.clear();\n        }\n    }\n    get(token, notFoundValue = THROW_IF_NOT_FOUND, flags = InjectFlags.Default) {\n        this.assertNotDestroyed();\n        // Set the injection context.\n        const previousInjector = setCurrentInjector(this);\n        try {\n            // Check for the SkipSelf flag.\n            if (!(flags & InjectFlags.SkipSelf)) {\n                // SkipSelf isn't set, check if the record belongs to this injector.\n                let record = this.records.get(token);\n                if (record === undefined) {\n                    // No record, but maybe the token is scoped to this injector. Look for an injectable\n                    // def with a scope matching this injector.\n                    const def = couldBeInjectableType(token) && getInjectableDef(token);\n                    if (def && this.injectableDefInScope(def)) {\n                        // Found an injectable def and it's scoped to this injector. Pretend as if it was here\n                        // all along.\n                        record = makeRecord(injectableDefOrInjectorDefFactory(token), NOT_YET);\n                    }\n                    else {\n                        record = null;\n                    }\n                    this.records.set(token, record);\n                }\n                // If a record was found, get the instance for it and return it.\n                if (record != null /* NOT null || undefined */) {\n                    return this.hydrate(token, record);\n                }\n            }\n            // Select the next injector based on the Self flag - if self is set, the next injector is\n            // the NullInjector, otherwise it's the parent.\n            const nextInjector = !(flags & InjectFlags.Self) ? this.parent : getNullInjector();\n            // Set the notFoundValue based on the Optional flag - if optional is set and notFoundValue\n            // is undefined, the value is null, otherwise it's the notFoundValue.\n            notFoundValue = (flags & InjectFlags.Optional) && notFoundValue === THROW_IF_NOT_FOUND ?\n                null :\n                notFoundValue;\n            return nextInjector.get(token, notFoundValue);\n        }\n        catch (e) {\n            if (e.name === 'NullInjectorError') {\n                const path = e[NG_TEMP_TOKEN_PATH] = e[NG_TEMP_TOKEN_PATH] || [];\n                path.unshift(stringify(token));\n                if (previousInjector) {\n                    // We still have a parent injector, keep throwing\n                    throw e;\n                }\n                else {\n                    // Format & throw the final error message when we don't have any previous injector\n                    return catchInjectorError(e, token, 'R3InjectorError', this.source);\n                }\n            }\n            else {\n                throw e;\n            }\n        }\n        finally {\n            // Lastly, clean up the state by restoring the previous injector.\n            setCurrentInjector(previousInjector);\n        }\n    }\n    /** @internal */\n    _resolveInjectorDefTypes() {\n        this.injectorDefTypes.forEach(defType => this.get(defType));\n    }\n    toString() {\n        const tokens = [], records = this.records;\n        records.forEach((v, token) => tokens.push(stringify(token)));\n        return `R3Injector[${tokens.join(', ')}]`;\n    }\n    assertNotDestroyed() {\n        if (this._destroyed) {\n            throw new Error('Injector has already been destroyed.');\n        }\n    }\n    /**\n     * Add an `InjectorType` or `InjectorTypeWithProviders` and all of its transitive providers\n     * to this injector.\n     *\n     * If an `InjectorTypeWithProviders` that declares providers besides the type is specified,\n     * the function will return \"true\" to indicate that the providers of the type definition need\n     * to be processed. This allows us to process providers of injector types after all imports of\n     * an injector definition are processed. (following View Engine semantics: see FW-1349)\n     */\n    processInjectorType(defOrWrappedDef, parents, dedupStack) {\n        defOrWrappedDef = resolveForwardRef(defOrWrappedDef);\n        if (!defOrWrappedDef)\n            return false;\n        // Either the defOrWrappedDef is an InjectorType (with injector def) or an\n        // InjectorDefTypeWithProviders (aka ModuleWithProviders). Detecting either is a megamorphic\n        // read, so care is taken to only do the read once.\n        // First attempt to read the injector def (`ɵinj`).\n        let def = getInjectorDef(defOrWrappedDef);\n        // If that's not present, then attempt to read ngModule from the InjectorDefTypeWithProviders.\n        const ngModule = (def == null) && defOrWrappedDef.ngModule || undefined;\n        // Determine the InjectorType. In the case where `defOrWrappedDef` is an `InjectorType`,\n        // then this is easy. In the case of an InjectorDefTypeWithProviders, then the definition type\n        // is the `ngModule`.\n        const defType = (ngModule === undefined) ? defOrWrappedDef : ngModule;\n        // Check for circular dependencies.\n        if (ngDevMode && parents.indexOf(defType) !== -1) {\n            const defName = stringify(defType);\n            throw new Error(`Circular dependency in DI detected for type ${defName}. Dependency path: ${parents.map(defType => stringify(defType)).join(' > ')} > ${defName}.`);\n        }\n        // Check for multiple imports of the same module\n        const isDuplicate = dedupStack.indexOf(defType) !== -1;\n        // Finally, if defOrWrappedType was an `InjectorDefTypeWithProviders`, then the actual\n        // `InjectorDef` is on its `ngModule`.\n        if (ngModule !== undefined) {\n            def = getInjectorDef(ngModule);\n        }\n        // If no definition was found, it might be from exports. Remove it.\n        if (def == null) {\n            return false;\n        }\n        // Add providers in the same way that @NgModule resolution did:\n        // First, include providers from any imports.\n        if (def.imports != null && !isDuplicate) {\n            // Before processing defType's imports, add it to the set of parents. This way, if it ends\n            // up deeply importing itself, this can be detected.\n            ngDevMode && parents.push(defType);\n            // Add it to the set of dedups. This way we can detect multiple imports of the same module\n            dedupStack.push(defType);\n            let importTypesWithProviders;\n            try {\n                deepForEach(def.imports, imported => {\n                    if (this.processInjectorType(imported, parents, dedupStack)) {\n                        if (importTypesWithProviders === undefined)\n                            importTypesWithProviders = [];\n                        // If the processed import is an injector type with providers, we store it in the\n                        // list of import types with providers, so that we can process those afterwards.\n                        importTypesWithProviders.push(imported);\n                    }\n                });\n            }\n            finally {\n                // Remove it from the parents set when finished.\n                ngDevMode && parents.pop();\n            }\n            // Imports which are declared with providers (TypeWithProviders) need to be processed\n            // after all imported modules are processed. This is similar to how View Engine\n            // processes/merges module imports in the metadata resolver. See: FW-1349.\n            if (importTypesWithProviders !== undefined) {\n                for (let i = 0; i < importTypesWithProviders.length; i++) {\n                    const { ngModule, providers } = importTypesWithProviders[i];\n                    deepForEach(providers, provider => this.processProvider(provider, ngModule, providers || EMPTY_ARRAY$2));\n                }\n            }\n        }\n        // Track the InjectorType and add a provider for it. It's important that this is done after the\n        // def's imports.\n        this.injectorDefTypes.add(defType);\n        this.records.set(defType, makeRecord(def.factory, NOT_YET));\n        // Next, include providers listed on the definition itself.\n        const defProviders = def.providers;\n        if (defProviders != null && !isDuplicate) {\n            const injectorType = defOrWrappedDef;\n            deepForEach(defProviders, provider => this.processProvider(provider, injectorType, defProviders));\n        }\n        return (ngModule !== undefined &&\n            defOrWrappedDef.providers !== undefined);\n    }\n    /**\n     * Process a `SingleProvider` and add it.\n     */\n    processProvider(provider, ngModuleType, providers) {\n        // Determine the token from the provider. Either it's its own token, or has a {provide: ...}\n        // property.\n        provider = resolveForwardRef(provider);\n        let token = isTypeProvider(provider) ? provider : resolveForwardRef(provider && provider.provide);\n        // Construct a `Record` for the provider.\n        const record = providerToRecord(provider, ngModuleType, providers);\n        if (!isTypeProvider(provider) && provider.multi === true) {\n            // If the provider indicates that it's a multi-provider, process it specially.\n            // First check whether it's been defined already.\n            let multiRecord = this.records.get(token);\n            if (multiRecord) {\n                // It has. Throw a nice error if\n                if (ngDevMode && multiRecord.multi === undefined) {\n                    throwMixedMultiProviderError();\n                }\n            }\n            else {\n                multiRecord = makeRecord(undefined, NOT_YET, true);\n                multiRecord.factory = () => injectArgs(multiRecord.multi);\n                this.records.set(token, multiRecord);\n            }\n            token = provider;\n            multiRecord.multi.push(provider);\n        }\n        else {\n            const existing = this.records.get(token);\n            if (ngDevMode && existing && existing.multi !== undefined) {\n                throwMixedMultiProviderError();\n            }\n        }\n        this.records.set(token, record);\n    }\n    hydrate(token, record) {\n        if (ngDevMode && record.value === CIRCULAR) {\n            throwCyclicDependencyError(stringify(token));\n        }\n        else if (record.value === NOT_YET) {\n            record.value = CIRCULAR;\n            record.value = record.factory();\n        }\n        if (typeof record.value === 'object' && record.value && hasOnDestroy(record.value)) {\n            this.onDestroy.add(record.value);\n        }\n        return record.value;\n    }\n    injectableDefInScope(def) {\n        if (!def.providedIn) {\n            return false;\n        }\n        else if (typeof def.providedIn === 'string') {\n            return def.providedIn === 'any' || (def.providedIn === this.scope);\n        }\n        else {\n            return this.injectorDefTypes.has(def.providedIn);\n        }\n    }\n}\nfunction injectableDefOrInjectorDefFactory(token) {\n    // Most tokens will have an injectable def directly on them, which specifies a factory directly.\n    const injectableDef = getInjectableDef(token);\n    const factory = injectableDef !== null ? injectableDef.factory : getFactoryDef(token);\n    if (factory !== null) {\n        return factory;\n    }\n    // If the token is an NgModule, it's also injectable but the factory is on its injector def\n    // (`ɵinj`)\n    const injectorDef = getInjectorDef(token);\n    if (injectorDef !== null) {\n        return injectorDef.factory;\n    }\n    // InjectionTokens should have an injectable def (ɵprov) and thus should be handled above.\n    // If it's missing that, it's an error.\n    if (token instanceof InjectionToken) {\n        throw new Error(`Token ${stringify(token)} is missing a ɵprov definition.`);\n    }\n    // Undecorated types can sometimes be created if they have no constructor arguments.\n    if (token instanceof Function) {\n        return getUndecoratedInjectableFactory(token);\n    }\n    // There was no way to resolve a factory for this token.\n    throw new Error('unreachable');\n}\nfunction getUndecoratedInjectableFactory(token) {\n    // If the token has parameters then it has dependencies that we cannot resolve implicitly.\n    const paramLength = token.length;\n    if (paramLength > 0) {\n        const args = newArray(paramLength, '?');\n        throw new Error(`Can't resolve all parameters for ${stringify(token)}: (${args.join(', ')}).`);\n    }\n    // The constructor function appears to have no parameters.\n    // This might be because it inherits from a super-class. In which case, use an injectable\n    // def from an ancestor if there is one.\n    // Otherwise this really is a simple class with no dependencies, so return a factory that\n    // just instantiates the zero-arg constructor.\n    const inheritedInjectableDef = getInheritedInjectableDef(token);\n    if (inheritedInjectableDef !== null) {\n        return () => inheritedInjectableDef.factory(token);\n    }\n    else {\n        return () => new token();\n    }\n}\nfunction providerToRecord(provider, ngModuleType, providers) {\n    if (isValueProvider(provider)) {\n        return makeRecord(undefined, provider.useValue);\n    }\n    else {\n        const factory = providerToFactory(provider, ngModuleType, providers);\n        return makeRecord(factory, NOT_YET);\n    }\n}\n/**\n * Converts a `SingleProvider` into a factory function.\n *\n * @param provider provider to convert to factory\n */\nfunction providerToFactory(provider, ngModuleType, providers) {\n    let factory = undefined;\n    if (isTypeProvider(provider)) {\n        const unwrappedProvider = resolveForwardRef(provider);\n        return getFactoryDef(unwrappedProvider) || injectableDefOrInjectorDefFactory(unwrappedProvider);\n    }\n    else {\n        if (isValueProvider(provider)) {\n            factory = () => resolveForwardRef(provider.useValue);\n        }\n        else if (isFactoryProvider(provider)) {\n            factory = () => provider.useFactory(...injectArgs(provider.deps || []));\n        }\n        else if (isExistingProvider(provider)) {\n            factory = () => ɵɵinject(resolveForwardRef(provider.useExisting));\n        }\n        else {\n            const classRef = resolveForwardRef(provider &&\n                (provider.useClass || provider.provide));\n            if (ngDevMode && !classRef) {\n                throwInvalidProviderError(ngModuleType, providers, provider);\n            }\n            if (hasDeps(provider)) {\n                factory = () => new (classRef)(...injectArgs(provider.deps));\n            }\n            else {\n                return getFactoryDef(classRef) || injectableDefOrInjectorDefFactory(classRef);\n            }\n        }\n    }\n    return factory;\n}\nfunction makeRecord(factory, value, multi = false) {\n    return {\n        factory: factory,\n        value: value,\n        multi: multi ? [] : undefined,\n    };\n}\nfunction isValueProvider(value) {\n    return value !== null && typeof value == 'object' && USE_VALUE in value;\n}\nfunction isExistingProvider(value) {\n    return !!(value && value.useExisting);\n}\nfunction isFactoryProvider(value) {\n    return !!(value && value.useFactory);\n}\nfunction isTypeProvider(value) {\n    return typeof value === 'function';\n}\nfunction isClassProvider(value) {\n    return !!value.useClass;\n}\nfunction hasDeps(value) {\n    return !!value.deps;\n}\nfunction hasOnDestroy(value) {\n    return value !== null && typeof value === 'object' &&\n        typeof value.ngOnDestroy === 'function';\n}\nfunction couldBeInjectableType(value) {\n    return (typeof value === 'function') ||\n        (typeof value === 'object' && value instanceof InjectionToken);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction INJECTOR_IMPL__PRE_R3__(providers, parent, name) {\n    return new StaticInjector(providers, parent, name);\n}\nfunction INJECTOR_IMPL__POST_R3__(providers, parent, name) {\n    return createInjector({ name: name }, parent, providers, name);\n}\nconst INJECTOR_IMPL = INJECTOR_IMPL__POST_R3__;\n/**\n * Concrete injectors implement this interface. Injectors are configured\n * with [providers](guide/glossary#provider) that associate\n * dependencies of various types with [injection tokens](guide/glossary#di-token).\n *\n * @see [\"DI Providers\"](guide/dependency-injection-providers).\n * @see `StaticProvider`\n *\n * @usageNotes\n *\n *  The following example creates a service injector instance.\n *\n * {@example core/di/ts/provider_spec.ts region='ConstructorProvider'}\n *\n * ### Usage example\n *\n * {@example core/di/ts/injector_spec.ts region='Injector'}\n *\n * `Injector` returns itself when given `Injector` as a token:\n *\n * {@example core/di/ts/injector_spec.ts region='injectInjector'}\n *\n * @publicApi\n */\nclass Injector {\n    static create(options, parent) {\n        if (Array.isArray(options)) {\n            return INJECTOR_IMPL(options, parent, '');\n        }\n        else {\n            return INJECTOR_IMPL(options.providers, options.parent, options.name || '');\n        }\n    }\n}\nInjector.THROW_IF_NOT_FOUND = THROW_IF_NOT_FOUND;\nInjector.NULL = new NullInjector();\n/** @nocollapse */\nInjector.ɵprov = ɵɵdefineInjectable({\n    token: Injector,\n    providedIn: 'any',\n    factory: () => ɵɵinject(INJECTOR),\n});\n/**\n * @internal\n * @nocollapse\n */\nInjector.__NG_ELEMENT_ID__ = -1;\nconst IDENT = function (value) {\n    return value;\n};\nconst ɵ0$9 = IDENT;\nconst EMPTY = [];\nconst CIRCULAR$1 = IDENT;\nconst MULTI_PROVIDER_FN = function () {\n    return Array.prototype.slice.call(arguments);\n};\nconst ɵ1$1 = MULTI_PROVIDER_FN;\nconst NO_NEW_LINE$1 = 'ɵ';\nclass StaticInjector {\n    constructor(providers, parent = Injector.NULL, source = null) {\n        this.parent = parent;\n        this.source = source;\n        const records = this._records = new Map();\n        records.set(Injector, { token: Injector, fn: IDENT, deps: EMPTY, value: this, useNew: false });\n        records.set(INJECTOR, { token: INJECTOR, fn: IDENT, deps: EMPTY, value: this, useNew: false });\n        this.scope = recursivelyProcessProviders(records, providers);\n    }\n    get(token, notFoundValue, flags = InjectFlags.Default) {\n        const records = this._records;\n        let record = records.get(token);\n        if (record === undefined) {\n            // This means we have never seen this record, see if it is tree shakable provider.\n            const injectableDef = getInjectableDef(token);\n            if (injectableDef) {\n                const providedIn = injectableDef && injectableDef.providedIn;\n                if (providedIn === 'any' || providedIn != null && providedIn === this.scope) {\n                    records.set(token, record = resolveProvider({ provide: token, useFactory: injectableDef.factory, deps: EMPTY }));\n                }\n            }\n            if (record === undefined) {\n                // Set record to null to make sure that we don't go through expensive lookup above again.\n                records.set(token, null);\n            }\n        }\n        let lastInjector = setCurrentInjector(this);\n        try {\n            return tryResolveToken(token, record, records, this.parent, notFoundValue, flags);\n        }\n        catch (e) {\n            return catchInjectorError(e, token, 'StaticInjectorError', this.source);\n        }\n        finally {\n            setCurrentInjector(lastInjector);\n        }\n    }\n    toString() {\n        const tokens = [], records = this._records;\n        records.forEach((v, token) => tokens.push(stringify(token)));\n        return `StaticInjector[${tokens.join(', ')}]`;\n    }\n}\nfunction resolveProvider(provider) {\n    const deps = computeDeps(provider);\n    let fn = IDENT;\n    let value = EMPTY;\n    let useNew = false;\n    let provide = resolveForwardRef(provider.provide);\n    if (USE_VALUE in provider) {\n        // We need to use USE_VALUE in provider since provider.useValue could be defined as undefined.\n        value = provider.useValue;\n    }\n    else if (provider.useFactory) {\n        fn = provider.useFactory;\n    }\n    else if (provider.useExisting) {\n        // Just use IDENT\n    }\n    else if (provider.useClass) {\n        useNew = true;\n        fn = resolveForwardRef(provider.useClass);\n    }\n    else if (typeof provide == 'function') {\n        useNew = true;\n        fn = provide;\n    }\n    else {\n        throw staticError('StaticProvider does not have [useValue|useFactory|useExisting|useClass] or [provide] is not newable', provider);\n    }\n    return { deps, fn, useNew, value };\n}\nfunction multiProviderMixError(token) {\n    return staticError('Cannot mix multi providers and regular providers', token);\n}\nfunction recursivelyProcessProviders(records, provider) {\n    let scope = null;\n    if (provider) {\n        provider = resolveForwardRef(provider);\n        if (Array.isArray(provider)) {\n            // if we have an array recurse into the array\n            for (let i = 0; i < provider.length; i++) {\n                scope = recursivelyProcessProviders(records, provider[i]) || scope;\n            }\n        }\n        else if (typeof provider === 'function') {\n            // Functions were supported in ReflectiveInjector, but are not here. For safety give useful\n            // error messages\n            throw staticError('Function/Class not supported', provider);\n        }\n        else if (provider && typeof provider === 'object' && provider.provide) {\n            // At this point we have what looks like a provider: {provide: ?, ....}\n            let token = resolveForwardRef(provider.provide);\n            const resolvedProvider = resolveProvider(provider);\n            if (provider.multi === true) {\n                // This is a multi provider.\n                let multiProvider = records.get(token);\n                if (multiProvider) {\n                    if (multiProvider.fn !== MULTI_PROVIDER_FN) {\n                        throw multiProviderMixError(token);\n                    }\n                }\n                else {\n                    // Create a placeholder factory which will look up the constituents of the multi provider.\n                    records.set(token, multiProvider = {\n                        token: provider.provide,\n                        deps: [],\n                        useNew: false,\n                        fn: MULTI_PROVIDER_FN,\n                        value: EMPTY\n                    });\n                }\n                // Treat the provider as the token.\n                token = provider;\n                multiProvider.deps.push({ token, options: 6 /* Default */ });\n            }\n            const record = records.get(token);\n            if (record && record.fn == MULTI_PROVIDER_FN) {\n                throw multiProviderMixError(token);\n            }\n            if (token === INJECTOR_SCOPE) {\n                scope = resolvedProvider.value;\n            }\n            records.set(token, resolvedProvider);\n        }\n        else {\n            throw staticError('Unexpected provider', provider);\n        }\n    }\n    return scope;\n}\nfunction tryResolveToken(token, record, records, parent, notFoundValue, flags) {\n    try {\n        return resolveToken(token, record, records, parent, notFoundValue, flags);\n    }\n    catch (e) {\n        // ensure that 'e' is of type Error.\n        if (!(e instanceof Error)) {\n            e = new Error(e);\n        }\n        const path = e[NG_TEMP_TOKEN_PATH] = e[NG_TEMP_TOKEN_PATH] || [];\n        path.unshift(token);\n        if (record && record.value == CIRCULAR$1) {\n            // Reset the Circular flag.\n            record.value = EMPTY;\n        }\n        throw e;\n    }\n}\nfunction resolveToken(token, record, records, parent, notFoundValue, flags) {\n    let value;\n    if (record && !(flags & InjectFlags.SkipSelf)) {\n        // If we don't have a record, this implies that we don't own the provider hence don't know how\n        // to resolve it.\n        value = record.value;\n        if (value == CIRCULAR$1) {\n            throw Error(NO_NEW_LINE$1 + 'Circular dependency');\n        }\n        else if (value === EMPTY) {\n            record.value = CIRCULAR$1;\n            let obj = undefined;\n            let useNew = record.useNew;\n            let fn = record.fn;\n            let depRecords = record.deps;\n            let deps = EMPTY;\n            if (depRecords.length) {\n                deps = [];\n                for (let i = 0; i < depRecords.length; i++) {\n                    const depRecord = depRecords[i];\n                    const options = depRecord.options;\n                    const childRecord = options & 2 /* CheckSelf */ ? records.get(depRecord.token) : undefined;\n                    deps.push(tryResolveToken(\n                    // Current Token to resolve\n                    depRecord.token, \n                    // A record which describes how to resolve the token.\n                    // If undefined, this means we don't have such a record\n                    childRecord, \n                    // Other records we know about.\n                    records, \n                    // If we don't know how to resolve dependency and we should not check parent for it,\n                    // than pass in Null injector.\n                    !childRecord && !(options & 4 /* CheckParent */) ? Injector.NULL : parent, options & 1 /* Optional */ ? null : Injector.THROW_IF_NOT_FOUND, InjectFlags.Default));\n                }\n            }\n            record.value = value = useNew ? new fn(...deps) : fn.apply(obj, deps);\n        }\n    }\n    else if (!(flags & InjectFlags.Self)) {\n        value = parent.get(token, notFoundValue, InjectFlags.Default);\n    }\n    else if (!(flags & InjectFlags.Optional)) {\n        value = Injector.NULL.get(token, notFoundValue);\n    }\n    else {\n        value = Injector.NULL.get(token, typeof notFoundValue !== 'undefined' ? notFoundValue : null);\n    }\n    return value;\n}\nfunction computeDeps(provider) {\n    let deps = EMPTY;\n    const providerDeps = provider.deps;\n    if (providerDeps && providerDeps.length) {\n        deps = [];\n        for (let i = 0; i < providerDeps.length; i++) {\n            let options = 6 /* Default */;\n            let token = resolveForwardRef(providerDeps[i]);\n            if (Array.isArray(token)) {\n                for (let j = 0, annotations = token; j < annotations.length; j++) {\n                    const annotation = annotations[j];\n                    if (annotation instanceof Optional || annotation == Optional) {\n                        options = options | 1 /* Optional */;\n                    }\n                    else if (annotation instanceof SkipSelf || annotation == SkipSelf) {\n                        options = options & ~2 /* CheckSelf */;\n                    }\n                    else if (annotation instanceof Self || annotation == Self) {\n                        options = options & ~4 /* CheckParent */;\n                    }\n                    else if (annotation instanceof Inject) {\n                        token = annotation.token;\n                    }\n                    else {\n                        token = resolveForwardRef(annotation);\n                    }\n                }\n            }\n            deps.push({ token, options });\n        }\n    }\n    else if (provider.useExisting) {\n        const token = resolveForwardRef(provider.useExisting);\n        deps = [{ token, options: 6 /* Default */ }];\n    }\n    else if (!providerDeps && !(USE_VALUE in provider)) {\n        // useValue & useExisting are the only ones which are exempt from deps all others need it.\n        throw staticError('\\'deps\\' required', provider);\n    }\n    return deps;\n}\nfunction staticError(text, obj) {\n    return new Error(formatError(text, obj, 'StaticInjectorError'));\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction findFirstClosedCycle(keys) {\n    const res = [];\n    for (let i = 0; i < keys.length; ++i) {\n        if (res.indexOf(keys[i]) > -1) {\n            res.push(keys[i]);\n            return res;\n        }\n        res.push(keys[i]);\n    }\n    return res;\n}\nfunction constructResolvingPath(keys) {\n    if (keys.length > 1) {\n        const reversed = findFirstClosedCycle(keys.slice().reverse());\n        const tokenStrs = reversed.map(k => stringify(k.token));\n        return ' (' + tokenStrs.join(' -> ') + ')';\n    }\n    return '';\n}\nfunction injectionError(injector, key, constructResolvingMessage, originalError) {\n    const keys = [key];\n    const errMsg = constructResolvingMessage(keys);\n    const error = (originalError ? wrappedError(errMsg, originalError) : Error(errMsg));\n    error.addKey = addKey;\n    error.keys = keys;\n    error.injectors = [injector];\n    error.constructResolvingMessage = constructResolvingMessage;\n    error[ERROR_ORIGINAL_ERROR] = originalError;\n    return error;\n}\nfunction addKey(injector, key) {\n    this.injectors.push(injector);\n    this.keys.push(key);\n    // Note: This updated message won't be reflected in the `.stack` property\n    this.message = this.constructResolvingMessage(this.keys);\n}\n/**\n * Thrown when trying to retrieve a dependency by key from {@link Injector}, but the\n * {@link Injector} does not have a {@link Provider} for the given key.\n *\n * @usageNotes\n * ### Example\n *\n * ```typescript\n * class A {\n *   constructor(b:B) {}\n * }\n *\n * expect(() => Injector.resolveAndCreate([A])).toThrowError();\n * ```\n */\nfunction noProviderError(injector, key) {\n    return injectionError(injector, key, function (keys) {\n        const first = stringify(keys[0].token);\n        return `No provider for ${first}!${constructResolvingPath(keys)}`;\n    });\n}\n/**\n * Thrown when dependencies form a cycle.\n *\n * @usageNotes\n * ### Example\n *\n * ```typescript\n * var injector = Injector.resolveAndCreate([\n *   {provide: \"one\", useFactory: (two) => \"two\", deps: [[new Inject(\"two\")]]},\n *   {provide: \"two\", useFactory: (one) => \"one\", deps: [[new Inject(\"one\")]]}\n * ]);\n *\n * expect(() => injector.get(\"one\")).toThrowError();\n * ```\n *\n * Retrieving `A` or `B` throws a `CyclicDependencyError` as the graph above cannot be constructed.\n */\nfunction cyclicDependencyError(injector, key) {\n    return injectionError(injector, key, function (keys) {\n        return `Cannot instantiate cyclic dependency!${constructResolvingPath(keys)}`;\n    });\n}\n/**\n * Thrown when a constructing type returns with an Error.\n *\n * The `InstantiationError` class contains the original error plus the dependency graph which caused\n * this object to be instantiated.\n *\n * @usageNotes\n * ### Example\n *\n * ```typescript\n * class A {\n *   constructor() {\n *     throw new Error('message');\n *   }\n * }\n *\n * var injector = Injector.resolveAndCreate([A]);\n\n * try {\n *   injector.get(A);\n * } catch (e) {\n *   expect(e instanceof InstantiationError).toBe(true);\n *   expect(e.originalException.message).toEqual(\"message\");\n *   expect(e.originalStack).toBeDefined();\n * }\n * ```\n */\nfunction instantiationError(injector, originalException, originalStack, key) {\n    return injectionError(injector, key, function (keys) {\n        const first = stringify(keys[0].token);\n        return `${originalException.message}: Error during instantiation of ${first}!${constructResolvingPath(keys)}.`;\n    }, originalException);\n}\n/**\n * Thrown when an object other then {@link Provider} (or `Type`) is passed to {@link Injector}\n * creation.\n *\n * @usageNotes\n * ### Example\n *\n * ```typescript\n * expect(() => Injector.resolveAndCreate([\"not a type\"])).toThrowError();\n * ```\n */\nfunction invalidProviderError(provider) {\n    return Error(`Invalid provider - only instances of Provider and Type are allowed, got: ${provider}`);\n}\n/**\n * Thrown when the class has no annotation information.\n *\n * Lack of annotation information prevents the {@link Injector} from determining which dependencies\n * need to be injected into the constructor.\n *\n * @usageNotes\n * ### Example\n *\n * ```typescript\n * class A {\n *   constructor(b) {}\n * }\n *\n * expect(() => Injector.resolveAndCreate([A])).toThrowError();\n * ```\n *\n * This error is also thrown when the class not marked with {@link Injectable} has parameter types.\n *\n * ```typescript\n * class B {}\n *\n * class A {\n *   constructor(b:B) {} // no information about the parameter types of A is available at runtime.\n * }\n *\n * expect(() => Injector.resolveAndCreate([A,B])).toThrowError();\n * ```\n *\n */\nfunction noAnnotationError(typeOrFunc, params) {\n    const signature = [];\n    for (let i = 0, ii = params.length; i < ii; i++) {\n        const parameter = params[i];\n        if (!parameter || parameter.length == 0) {\n            signature.push('?');\n        }\n        else {\n            signature.push(parameter.map(stringify).join(' '));\n        }\n    }\n    return Error('Cannot resolve all parameters for \\'' + stringify(typeOrFunc) + '\\'(' +\n        signature.join(', ') + '). ' +\n        'Make sure that all the parameters are decorated with Inject or have valid type annotations and that \\'' +\n        stringify(typeOrFunc) + '\\' is decorated with Injectable.');\n}\n/**\n * Thrown when getting an object by index.\n *\n * @usageNotes\n * ### Example\n *\n * ```typescript\n * class A {}\n *\n * var injector = Injector.resolveAndCreate([A]);\n *\n * expect(() => injector.getAt(100)).toThrowError();\n * ```\n *\n */\nfunction outOfBoundsError(index) {\n    return Error(`Index ${index} is out-of-bounds.`);\n}\n// TODO: add a working example after alpha38 is released\n/**\n * Thrown when a multi provider and a regular provider are bound to the same token.\n *\n * @usageNotes\n * ### Example\n *\n * ```typescript\n * expect(() => Injector.resolveAndCreate([\n *   { provide: \"Strings\", useValue: \"string1\", multi: true},\n *   { provide: \"Strings\", useValue: \"string2\", multi: false}\n * ])).toThrowError();\n * ```\n */\nfunction mixingMultiProvidersWithRegularProvidersError(provider1, provider2) {\n    return Error(`Cannot mix multi providers and regular providers, got: ${provider1} ${provider2}`);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * A unique object used for retrieving items from the {@link ReflectiveInjector}.\n *\n * Keys have:\n * - a system-wide unique `id`.\n * - a `token`.\n *\n * `Key` is used internally by {@link ReflectiveInjector} because its system-wide unique `id` allows\n * the\n * injector to store created objects in a more efficient way.\n *\n * `Key` should not be created directly. {@link ReflectiveInjector} creates keys automatically when\n * resolving\n * providers.\n *\n * @deprecated No replacement\n * @publicApi\n */\nclass ReflectiveKey {\n    /**\n     * Private\n     */\n    constructor(token, id) {\n        this.token = token;\n        this.id = id;\n        if (!token) {\n            throw new Error('Token must be defined!');\n        }\n        this.displayName = stringify(this.token);\n    }\n    /**\n     * Retrieves a `Key` for a token.\n     */\n    static get(token) {\n        return _globalKeyRegistry.get(resolveForwardRef(token));\n    }\n    /**\n     * @returns the number of keys registered in the system.\n     */\n    static get numberOfKeys() {\n        return _globalKeyRegistry.numberOfKeys;\n    }\n}\nclass KeyRegistry {\n    constructor() {\n        this._allKeys = new Map();\n    }\n    get(token) {\n        if (token instanceof ReflectiveKey)\n            return token;\n        if (this._allKeys.has(token)) {\n            return this._allKeys.get(token);\n        }\n        const newKey = new ReflectiveKey(token, ReflectiveKey.numberOfKeys);\n        this._allKeys.set(token, newKey);\n        return newKey;\n    }\n    get numberOfKeys() {\n        return this._allKeys.size;\n    }\n}\nconst _globalKeyRegistry = new KeyRegistry();\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Provides access to reflection data about symbols. Used internally by Angular\n * to power dependency injection and compilation.\n */\nclass Reflector {\n    constructor(reflectionCapabilities) {\n        this.reflectionCapabilities = reflectionCapabilities;\n    }\n    updateCapabilities(caps) {\n        this.reflectionCapabilities = caps;\n    }\n    factory(type) {\n        return this.reflectionCapabilities.factory(type);\n    }\n    parameters(typeOrFunc) {\n        return this.reflectionCapabilities.parameters(typeOrFunc);\n    }\n    annotations(typeOrFunc) {\n        return this.reflectionCapabilities.annotations(typeOrFunc);\n    }\n    propMetadata(typeOrFunc) {\n        return this.reflectionCapabilities.propMetadata(typeOrFunc);\n    }\n    hasLifecycleHook(type, lcProperty) {\n        return this.reflectionCapabilities.hasLifecycleHook(type, lcProperty);\n    }\n    getter(name) {\n        return this.reflectionCapabilities.getter(name);\n    }\n    setter(name) {\n        return this.reflectionCapabilities.setter(name);\n    }\n    method(name) {\n        return this.reflectionCapabilities.method(name);\n    }\n    importUri(type) {\n        return this.reflectionCapabilities.importUri(type);\n    }\n    resourceUri(type) {\n        return this.reflectionCapabilities.resourceUri(type);\n    }\n    resolveIdentifier(name, moduleUrl, members, runtime) {\n        return this.reflectionCapabilities.resolveIdentifier(name, moduleUrl, members, runtime);\n    }\n    resolveEnum(identifier, name) {\n        return this.reflectionCapabilities.resolveEnum(identifier, name);\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * The {@link Reflector} used internally in Angular to access metadata\n * about symbols.\n */\nconst reflector = new Reflector(new ReflectionCapabilities());\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * `Dependency` is used by the framework to extend DI.\n * This is internal to Angular and should not be used directly.\n */\nclass ReflectiveDependency {\n    constructor(key, optional, visibility) {\n        this.key = key;\n        this.optional = optional;\n        this.visibility = visibility;\n    }\n    static fromKey(key) {\n        return new ReflectiveDependency(key, false, null);\n    }\n}\nconst _EMPTY_LIST = [];\nclass ResolvedReflectiveProvider_ {\n    constructor(key, resolvedFactories, multiProvider) {\n        this.key = key;\n        this.resolvedFactories = resolvedFactories;\n        this.multiProvider = multiProvider;\n        this.resolvedFactory = this.resolvedFactories[0];\n    }\n}\n/**\n * An internal resolved representation of a factory function created by resolving `Provider`.\n * @publicApi\n */\nclass ResolvedReflectiveFactory {\n    constructor(\n    /**\n     * Factory function which can return an instance of an object represented by a key.\n     */\n    factory, \n    /**\n     * Arguments (dependencies) to the `factory` function.\n     */\n    dependencies) {\n        this.factory = factory;\n        this.dependencies = dependencies;\n    }\n}\n/**\n * Resolve a single provider.\n */\nfunction resolveReflectiveFactory(provider) {\n    let factoryFn;\n    let resolvedDeps;\n    if (provider.useClass) {\n        const useClass = resolveForwardRef(provider.useClass);\n        factoryFn = reflector.factory(useClass);\n        resolvedDeps = _dependenciesFor(useClass);\n    }\n    else if (provider.useExisting) {\n        factoryFn = (aliasInstance) => aliasInstance;\n        resolvedDeps = [ReflectiveDependency.fromKey(ReflectiveKey.get(provider.useExisting))];\n    }\n    else if (provider.useFactory) {\n        factoryFn = provider.useFactory;\n        resolvedDeps = constructDependencies(provider.useFactory, provider.deps);\n    }\n    else {\n        factoryFn = () => provider.useValue;\n        resolvedDeps = _EMPTY_LIST;\n    }\n    return new ResolvedReflectiveFactory(factoryFn, resolvedDeps);\n}\n/**\n * Converts the `Provider` into `ResolvedProvider`.\n *\n * `Injector` internally only uses `ResolvedProvider`, `Provider` contains convenience provider\n * syntax.\n */\nfunction resolveReflectiveProvider(provider) {\n    return new ResolvedReflectiveProvider_(ReflectiveKey.get(provider.provide), [resolveReflectiveFactory(provider)], provider.multi || false);\n}\n/**\n * Resolve a list of Providers.\n */\nfunction resolveReflectiveProviders(providers) {\n    const normalized = _normalizeProviders(providers, []);\n    const resolved = normalized.map(resolveReflectiveProvider);\n    const resolvedProviderMap = mergeResolvedReflectiveProviders(resolved, new Map());\n    return Array.from(resolvedProviderMap.values());\n}\n/**\n * Merges a list of ResolvedProviders into a list where each key is contained exactly once and\n * multi providers have been merged.\n */\nfunction mergeResolvedReflectiveProviders(providers, normalizedProvidersMap) {\n    for (let i = 0; i < providers.length; i++) {\n        const provider = providers[i];\n        const existing = normalizedProvidersMap.get(provider.key.id);\n        if (existing) {\n            if (provider.multiProvider !== existing.multiProvider) {\n                throw mixingMultiProvidersWithRegularProvidersError(existing, provider);\n            }\n            if (provider.multiProvider) {\n                for (let j = 0; j < provider.resolvedFactories.length; j++) {\n                    existing.resolvedFactories.push(provider.resolvedFactories[j]);\n                }\n            }\n            else {\n                normalizedProvidersMap.set(provider.key.id, provider);\n            }\n        }\n        else {\n            let resolvedProvider;\n            if (provider.multiProvider) {\n                resolvedProvider = new ResolvedReflectiveProvider_(provider.key, provider.resolvedFactories.slice(), provider.multiProvider);\n            }\n            else {\n                resolvedProvider = provider;\n            }\n            normalizedProvidersMap.set(provider.key.id, resolvedProvider);\n        }\n    }\n    return normalizedProvidersMap;\n}\nfunction _normalizeProviders(providers, res) {\n    providers.forEach(b => {\n        if (b instanceof Type) {\n            res.push({ provide: b, useClass: b });\n        }\n        else if (b && typeof b == 'object' && b.provide !== undefined) {\n            res.push(b);\n        }\n        else if (Array.isArray(b)) {\n            _normalizeProviders(b, res);\n        }\n        else {\n            throw invalidProviderError(b);\n        }\n    });\n    return res;\n}\nfunction constructDependencies(typeOrFunc, dependencies) {\n    if (!dependencies) {\n        return _dependenciesFor(typeOrFunc);\n    }\n    else {\n        const params = dependencies.map(t => [t]);\n        return dependencies.map(t => _extractToken(typeOrFunc, t, params));\n    }\n}\nfunction _dependenciesFor(typeOrFunc) {\n    const params = reflector.parameters(typeOrFunc);\n    if (!params)\n        return [];\n    if (params.some(p => p == null)) {\n        throw noAnnotationError(typeOrFunc, params);\n    }\n    return params.map(p => _extractToken(typeOrFunc, p, params));\n}\nfunction _extractToken(typeOrFunc, metadata, params) {\n    let token = null;\n    let optional = false;\n    if (!Array.isArray(metadata)) {\n        if (metadata instanceof Inject) {\n            return _createDependency(metadata.token, optional, null);\n        }\n        else {\n            return _createDependency(metadata, optional, null);\n        }\n    }\n    let visibility = null;\n    for (let i = 0; i < metadata.length; ++i) {\n        const paramMetadata = metadata[i];\n        if (paramMetadata instanceof Type) {\n            token = paramMetadata;\n        }\n        else if (paramMetadata instanceof Inject) {\n            token = paramMetadata.token;\n        }\n        else if (paramMetadata instanceof Optional) {\n            optional = true;\n        }\n        else if (paramMetadata instanceof Self || paramMetadata instanceof SkipSelf) {\n            visibility = paramMetadata;\n        }\n        else if (paramMetadata instanceof InjectionToken) {\n            token = paramMetadata;\n        }\n    }\n    token = resolveForwardRef(token);\n    if (token != null) {\n        return _createDependency(token, optional, visibility);\n    }\n    else {\n        throw noAnnotationError(typeOrFunc, params);\n    }\n}\nfunction _createDependency(token, optional, visibility) {\n    return new ReflectiveDependency(ReflectiveKey.get(token), optional, visibility);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// Threshold for the dynamic version\nconst UNDEFINED = {};\n/**\n * A ReflectiveDependency injection container used for instantiating objects and resolving\n * dependencies.\n *\n * An `Injector` is a replacement for a `new` operator, which can automatically resolve the\n * constructor dependencies.\n *\n * In typical use, application code asks for the dependencies in the constructor and they are\n * resolved by the `Injector`.\n *\n * @usageNotes\n * ### Example\n *\n * The following example creates an `Injector` configured to create `Engine` and `Car`.\n *\n * ```typescript\n * @Injectable()\n * class Engine {\n * }\n *\n * @Injectable()\n * class Car {\n *   constructor(public engine:Engine) {}\n * }\n *\n * var injector = ReflectiveInjector.resolveAndCreate([Car, Engine]);\n * var car = injector.get(Car);\n * expect(car instanceof Car).toBe(true);\n * expect(car.engine instanceof Engine).toBe(true);\n * ```\n *\n * Notice, we don't use the `new` operator because we explicitly want to have the `Injector`\n * resolve all of the object's dependencies automatically.\n *\n * @deprecated from v5 - slow and brings in a lot of code, Use `Injector.create` instead.\n * @publicApi\n */\nclass ReflectiveInjector {\n    /**\n     * Turns an array of provider definitions into an array of resolved providers.\n     *\n     * A resolution is a process of flattening multiple nested arrays and converting individual\n     * providers into an array of `ResolvedReflectiveProvider`s.\n     *\n     * @usageNotes\n     * ### Example\n     *\n     * ```typescript\n     * @Injectable()\n     * class Engine {\n     * }\n     *\n     * @Injectable()\n     * class Car {\n     *   constructor(public engine:Engine) {}\n     * }\n     *\n     * var providers = ReflectiveInjector.resolve([Car, [[Engine]]]);\n     *\n     * expect(providers.length).toEqual(2);\n     *\n     * expect(providers[0] instanceof ResolvedReflectiveProvider).toBe(true);\n     * expect(providers[0].key.displayName).toBe(\"Car\");\n     * expect(providers[0].dependencies.length).toEqual(1);\n     * expect(providers[0].factory).toBeDefined();\n     *\n     * expect(providers[1].key.displayName).toBe(\"Engine\");\n     * });\n     * ```\n     *\n     */\n    static resolve(providers) {\n        return resolveReflectiveProviders(providers);\n    }\n    /**\n     * Resolves an array of providers and creates an injector from those providers.\n     *\n     * The passed-in providers can be an array of `Type`, `Provider`,\n     * or a recursive array of more providers.\n     *\n     * @usageNotes\n     * ### Example\n     *\n     * ```typescript\n     * @Injectable()\n     * class Engine {\n     * }\n     *\n     * @Injectable()\n     * class Car {\n     *   constructor(public engine:Engine) {}\n     * }\n     *\n     * var injector = ReflectiveInjector.resolveAndCreate([Car, Engine]);\n     * expect(injector.get(Car) instanceof Car).toBe(true);\n     * ```\n     */\n    static resolveAndCreate(providers, parent) {\n        const ResolvedReflectiveProviders = ReflectiveInjector.resolve(providers);\n        return ReflectiveInjector.fromResolvedProviders(ResolvedReflectiveProviders, parent);\n    }\n    /**\n     * Creates an injector from previously resolved providers.\n     *\n     * This API is the recommended way to construct injectors in performance-sensitive parts.\n     *\n     * @usageNotes\n     * ### Example\n     *\n     * ```typescript\n     * @Injectable()\n     * class Engine {\n     * }\n     *\n     * @Injectable()\n     * class Car {\n     *   constructor(public engine:Engine) {}\n     * }\n     *\n     * var providers = ReflectiveInjector.resolve([Car, Engine]);\n     * var injector = ReflectiveInjector.fromResolvedProviders(providers);\n     * expect(injector.get(Car) instanceof Car).toBe(true);\n     * ```\n     */\n    static fromResolvedProviders(providers, parent) {\n        return new ReflectiveInjector_(providers, parent);\n    }\n}\nclass ReflectiveInjector_ {\n    /**\n     * Private\n     */\n    constructor(_providers, _parent) {\n        /** @internal */\n        this._constructionCounter = 0;\n        this._providers = _providers;\n        this.parent = _parent || null;\n        const len = _providers.length;\n        this.keyIds = [];\n        this.objs = [];\n        for (let i = 0; i < len; i++) {\n            this.keyIds[i] = _providers[i].key.id;\n            this.objs[i] = UNDEFINED;\n        }\n    }\n    get(token, notFoundValue = THROW_IF_NOT_FOUND) {\n        return this._getByKey(ReflectiveKey.get(token), null, notFoundValue);\n    }\n    resolveAndCreateChild(providers) {\n        const ResolvedReflectiveProviders = ReflectiveInjector.resolve(providers);\n        return this.createChildFromResolved(ResolvedReflectiveProviders);\n    }\n    createChildFromResolved(providers) {\n        const inj = new ReflectiveInjector_(providers);\n        inj.parent = this;\n        return inj;\n    }\n    resolveAndInstantiate(provider) {\n        return this.instantiateResolved(ReflectiveInjector.resolve([provider])[0]);\n    }\n    instantiateResolved(provider) {\n        return this._instantiateProvider(provider);\n    }\n    getProviderAtIndex(index) {\n        if (index < 0 || index >= this._providers.length) {\n            throw outOfBoundsError(index);\n        }\n        return this._providers[index];\n    }\n    /** @internal */\n    _new(provider) {\n        if (this._constructionCounter++ > this._getMaxNumberOfObjects()) {\n            throw cyclicDependencyError(this, provider.key);\n        }\n        return this._instantiateProvider(provider);\n    }\n    _getMaxNumberOfObjects() {\n        return this.objs.length;\n    }\n    _instantiateProvider(provider) {\n        if (provider.multiProvider) {\n            const res = [];\n            for (let i = 0; i < provider.resolvedFactories.length; ++i) {\n                res[i] = this._instantiate(provider, provider.resolvedFactories[i]);\n            }\n            return res;\n        }\n        else {\n            return this._instantiate(provider, provider.resolvedFactories[0]);\n        }\n    }\n    _instantiate(provider, ResolvedReflectiveFactory) {\n        const factory = ResolvedReflectiveFactory.factory;\n        let deps;\n        try {\n            deps =\n                ResolvedReflectiveFactory.dependencies.map(dep => this._getByReflectiveDependency(dep));\n        }\n        catch (e) {\n            if (e.addKey) {\n                e.addKey(this, provider.key);\n            }\n            throw e;\n        }\n        let obj;\n        try {\n            obj = factory(...deps);\n        }\n        catch (e) {\n            throw instantiationError(this, e, e.stack, provider.key);\n        }\n        return obj;\n    }\n    _getByReflectiveDependency(dep) {\n        return this._getByKey(dep.key, dep.visibility, dep.optional ? null : THROW_IF_NOT_FOUND);\n    }\n    _getByKey(key, visibility, notFoundValue) {\n        if (key === ReflectiveInjector_.INJECTOR_KEY) {\n            return this;\n        }\n        if (visibility instanceof Self) {\n            return this._getByKeySelf(key, notFoundValue);\n        }\n        else {\n            return this._getByKeyDefault(key, notFoundValue, visibility);\n        }\n    }\n    _getObjByKeyId(keyId) {\n        for (let i = 0; i < this.keyIds.length; i++) {\n            if (this.keyIds[i] === keyId) {\n                if (this.objs[i] === UNDEFINED) {\n                    this.objs[i] = this._new(this._providers[i]);\n                }\n                return this.objs[i];\n            }\n        }\n        return UNDEFINED;\n    }\n    /** @internal */\n    _throwOrNull(key, notFoundValue) {\n        if (notFoundValue !== THROW_IF_NOT_FOUND) {\n            return notFoundValue;\n        }\n        else {\n            throw noProviderError(this, key);\n        }\n    }\n    /** @internal */\n    _getByKeySelf(key, notFoundValue) {\n        const obj = this._getObjByKeyId(key.id);\n        return (obj !== UNDEFINED) ? obj : this._throwOrNull(key, notFoundValue);\n    }\n    /** @internal */\n    _getByKeyDefault(key, notFoundValue, visibility) {\n        let inj;\n        if (visibility instanceof SkipSelf) {\n            inj = this.parent;\n        }\n        else {\n            inj = this;\n        }\n        while (inj instanceof ReflectiveInjector_) {\n            const inj_ = inj;\n            const obj = inj_._getObjByKeyId(key.id);\n            if (obj !== UNDEFINED)\n                return obj;\n            inj = inj_.parent;\n        }\n        if (inj !== null) {\n            return inj.get(key.token, notFoundValue);\n        }\n        else {\n            return this._throwOrNull(key, notFoundValue);\n        }\n    }\n    get displayName() {\n        const providers = _mapProviders(this, (b) => ' \"' + b.key.displayName + '\" ')\n            .join(', ');\n        return `ReflectiveInjector(providers: [${providers}])`;\n    }\n    toString() {\n        return this.displayName;\n    }\n}\nReflectiveInjector_.INJECTOR_KEY = ReflectiveKey.get(Injector);\nfunction _mapProviders(injector, fn) {\n    const res = [];\n    for (let i = 0; i < injector._providers.length; ++i) {\n        res[i] = fn(injector.getProviderAtIndex(i));\n    }\n    return res;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * A DI token that you can use to create a virtual [provider](guide/glossary#provider)\n * that will populate the `entryComponents` field of components and NgModules\n * based on its `useValue` property value.\n * All components that are referenced in the `useValue` value (either directly\n * or in a nested array or map) are added to the `entryComponents` property.\n *\n * @usageNotes\n *\n * The following example shows how the router can populate the `entryComponents`\n * field of an NgModule based on a router configuration that refers\n * to components.\n *\n * ```typescript\n * // helper function inside the router\n * function provideRoutes(routes) {\n *   return [\n *     {provide: ROUTES, useValue: routes},\n *     {provide: ANALYZE_FOR_ENTRY_COMPONENTS, useValue: routes, multi: true}\n *   ];\n * }\n *\n * // user code\n * let routes = [\n *   {path: '/root', component: RootComp},\n *   {path: '/teams', component: TeamsComp}\n * ];\n *\n * @NgModule({\n *   providers: [provideRoutes(routes)]\n * })\n * class ModuleWithRoutes {}\n * ```\n *\n * @publicApi\n * @deprecated Since 9.0.0. With Ivy, this property is no longer necessary.\n */\nconst ANALYZE_FOR_ENTRY_COMPONENTS = new InjectionToken('AnalyzeForEntryComponents');\n/**\n * Base class for query metadata.\n *\n * @see `ContentChildren`.\n * @see `ContentChild`.\n * @see `ViewChildren`.\n * @see `ViewChild`.\n *\n * @publicApi\n */\nclass Query {\n}\nconst ɵ0$a = (selector, data = {}) => (Object.assign({ selector, first: false, isViewQuery: false, descendants: false }, data));\n/**\n * ContentChildren decorator and metadata.\n *\n *\n * @Annotation\n * @publicApi\n */\nconst ContentChildren = makePropDecorator('ContentChildren', ɵ0$a, Query);\nconst ɵ1$2 = (selector, data = {}) => (Object.assign({ selector, first: true, isViewQuery: false, descendants: true }, data));\n/**\n * ContentChild decorator and metadata.\n *\n *\n * @Annotation\n *\n * @publicApi\n */\nconst ContentChild = makePropDecorator('ContentChild', ɵ1$2, Query);\nconst ɵ2 = (selector, data = {}) => (Object.assign({ selector, first: false, isViewQuery: true, descendants: true }, data));\n/**\n * ViewChildren decorator and metadata.\n *\n * @Annotation\n * @publicApi\n */\nconst ViewChildren = makePropDecorator('ViewChildren', ɵ2, Query);\nconst ɵ3 = (selector, data) => (Object.assign({ selector, first: true, isViewQuery: true, descendants: true }, data));\n/**\n * ViewChild decorator and metadata.\n *\n * @Annotation\n * @publicApi\n */\nconst ViewChild = makePropDecorator('ViewChild', ɵ3, Query);\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Used to resolve resource URLs on `@Component` when used with JIT compilation.\n *\n * Example:\n * ```\n * @Component({\n *   selector: 'my-comp',\n *   templateUrl: 'my-comp.html', // This requires asynchronous resolution\n * })\n * class MyComponent{\n * }\n *\n * // Calling `renderComponent` will fail because `renderComponent` is a synchronous process\n * // and `MyComponent`'s `@Component.templateUrl` needs to be resolved asynchronously.\n *\n * // Calling `resolveComponentResources()` will resolve `@Component.templateUrl` into\n * // `@Component.template`, which allows `renderComponent` to proceed in a synchronous manner.\n *\n * // Use browser's `fetch()` function as the default resource resolution strategy.\n * resolveComponentResources(fetch).then(() => {\n *   // After resolution all URLs have been converted into `template` strings.\n *   renderComponent(MyComponent);\n * });\n *\n * ```\n *\n * NOTE: In AOT the resolution happens during compilation, and so there should be no need\n * to call this method outside JIT mode.\n *\n * @param resourceResolver a function which is responsible for returning a `Promise` to the\n * contents of the resolved URL. Browser's `fetch()` method is a good default implementation.\n */\nfunction resolveComponentResources(resourceResolver) {\n    // Store all promises which are fetching the resources.\n    const componentResolved = [];\n    // Cache so that we don't fetch the same resource more than once.\n    const urlMap = new Map();\n    function cachedResourceResolve(url) {\n        let promise = urlMap.get(url);\n        if (!promise) {\n            const resp = resourceResolver(url);\n            urlMap.set(url, promise = resp.then(unwrapResponse));\n        }\n        return promise;\n    }\n    componentResourceResolutionQueue.forEach((component, type) => {\n        const promises = [];\n        if (component.templateUrl) {\n            promises.push(cachedResourceResolve(component.templateUrl).then((template) => {\n                component.template = template;\n            }));\n        }\n        const styleUrls = component.styleUrls;\n        const styles = component.styles || (component.styles = []);\n        const styleOffset = component.styles.length;\n        styleUrls && styleUrls.forEach((styleUrl, index) => {\n            styles.push(''); // pre-allocate array.\n            promises.push(cachedResourceResolve(styleUrl).then((style) => {\n                styles[styleOffset + index] = style;\n                styleUrls.splice(styleUrls.indexOf(styleUrl), 1);\n                if (styleUrls.length == 0) {\n                    component.styleUrls = undefined;\n                }\n            }));\n        });\n        const fullyResolved = Promise.all(promises).then(() => componentDefResolved(type));\n        componentResolved.push(fullyResolved);\n    });\n    clearResolutionOfComponentResourcesQueue();\n    return Promise.all(componentResolved).then(() => undefined);\n}\nlet componentResourceResolutionQueue = new Map();\n// Track when existing ɵcmp for a Type is waiting on resources.\nconst componentDefPendingResolution = new Set();\nfunction maybeQueueResolutionOfComponentResources(type, metadata) {\n    if (componentNeedsResolution(metadata)) {\n        componentResourceResolutionQueue.set(type, metadata);\n        componentDefPendingResolution.add(type);\n    }\n}\nfunction isComponentDefPendingResolution(type) {\n    return componentDefPendingResolution.has(type);\n}\nfunction componentNeedsResolution(component) {\n    return !!((component.templateUrl && !component.hasOwnProperty('template')) ||\n        component.styleUrls && component.styleUrls.length);\n}\nfunction clearResolutionOfComponentResourcesQueue() {\n    const old = componentResourceResolutionQueue;\n    componentResourceResolutionQueue = new Map();\n    return old;\n}\nfunction restoreComponentResolutionQueue(queue) {\n    componentDefPendingResolution.clear();\n    queue.forEach((_, type) => componentDefPendingResolution.add(type));\n    componentResourceResolutionQueue = queue;\n}\nfunction isComponentResourceResolutionQueueEmpty() {\n    return componentResourceResolutionQueue.size === 0;\n}\nfunction unwrapResponse(response) {\n    return typeof response == 'string' ? response : response.text();\n}\nfunction componentDefResolved(type) {\n    componentDefPendingResolution.delete(type);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Compute the static styling (class/style) from `TAttributes`.\n *\n * This function should be called during `firstCreatePass` only.\n *\n * @param tNode The `TNode` into which the styling information should be loaded.\n * @param attrs `TAttributes` containing the styling information.\n * @param writeToHost Where should the resulting static styles be written?\n *   - `false` Write to `TNode.stylesWithoutHost` / `TNode.classesWithoutHost`\n *   - `true` Write to `TNode.styles` / `TNode.classes`\n */\nfunction computeStaticStyling(tNode, attrs, writeToHost) {\n    ngDevMode &&\n        assertFirstCreatePass(getTView(), 'Expecting to be called in first template pass only');\n    let styles = writeToHost ? tNode.styles : null;\n    let classes = writeToHost ? tNode.classes : null;\n    let mode = 0;\n    if (attrs !== null) {\n        for (let i = 0; i < attrs.length; i++) {\n            const value = attrs[i];\n            if (typeof value === 'number') {\n                mode = value;\n            }\n            else if (mode == 1 /* Classes */) {\n                classes = concatStringsWithSpace(classes, value);\n            }\n            else if (mode == 2 /* Styles */) {\n                const style = value;\n                const styleValue = attrs[++i];\n                styles = concatStringsWithSpace(styles, style + ': ' + styleValue + ';');\n            }\n        }\n    }\n    writeToHost ? tNode.styles = styles : tNode.stylesWithoutHost = styles;\n    writeToHost ? tNode.classes = classes : tNode.classesWithoutHost = classes;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Synchronously perform change detection on a component (and possibly its sub-components).\n *\n * This function triggers change detection in a synchronous way on a component.\n *\n * @param component The component which the change detection should be performed on.\n */\nfunction detectChanges(component) {\n    const view = getComponentViewByInstance(component);\n    detectChangesInternal(view[TVIEW], view, component);\n}\n/**\n * Marks the component as dirty (needing change detection). Marking a component dirty will\n * schedule a change detection on it at some point in the future.\n *\n * Marking an already dirty component as dirty won't do anything. Only one outstanding change\n * detection can be scheduled per component tree.\n *\n * @param component Component to mark as dirty.\n */\nfunction markDirty(component) {\n    ngDevMode && assertDefined(component, 'component');\n    const rootView = markViewDirty(getComponentViewByInstance(component));\n    ngDevMode && assertDefined(rootView[CONTEXT], 'rootContext should be defined');\n    scheduleTick(rootView[CONTEXT], 1 /* DetectChanges */);\n}\n/**\n * Used to perform change detection on the whole application.\n *\n * This is equivalent to `detectChanges`, but invoked on root component. Additionally, `tick`\n * executes lifecycle hooks and conditionally checks components based on their\n * `ChangeDetectionStrategy` and dirtiness.\n *\n * The preferred way to trigger change detection is to call `markDirty`. `markDirty` internally\n * schedules `tick` using a scheduler in order to coalesce multiple `markDirty` calls into a\n * single change detection run. By default, the scheduler is `requestAnimationFrame`, but can\n * be changed when calling `renderComponent` and providing the `scheduler` option.\n */\nfunction tick(component) {\n    const rootView = getRootView(component);\n    const rootContext = rootView[CONTEXT];\n    tickRootContext(rootContext);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Retrieves the component instance associated with a given DOM element.\n *\n * @usageNotes\n * Given the following DOM structure:\n * ```html\n * <my-app>\n *   <div>\n *     <child-comp></child-comp>\n *   </div>\n * </my-app>\n * ```\n * Calling `getComponent` on `<child-comp>` will return the instance of `ChildComponent`\n * associated with this DOM element.\n *\n * Calling the function on `<my-app>` will return the `MyApp` instance.\n *\n *\n * @param element DOM element from which the component should be retrieved.\n * @returns Component instance associated with the element or `null` if there\n *    is no component associated with it.\n *\n * @publicApi\n * @globalApi ng\n */\nfunction getComponent(element) {\n    assertDomElement(element);\n    const context = loadLContext(element, false);\n    if (context === null)\n        return null;\n    if (context.component === undefined) {\n        context.component = getComponentAtNodeIndex(context.nodeIndex, context.lView);\n    }\n    return context.component;\n}\n/**\n * If inside an embedded view (e.g. `*ngIf` or `*ngFor`), retrieves the context of the embedded\n * view that the element is part of. Otherwise retrieves the instance of the component whose view\n * owns the element (in this case, the result is the same as calling `getOwningComponent`).\n *\n * @param element Element for which to get the surrounding component instance.\n * @returns Instance of the component that is around the element or null if the element isn't\n *    inside any component.\n *\n * @publicApi\n * @globalApi ng\n */\nfunction getContext(element) {\n    assertDomElement(element);\n    const context = loadLContext(element, false);\n    return context === null ? null : context.lView[CONTEXT];\n}\n/**\n * Retrieves the component instance whose view contains the DOM element.\n *\n * For example, if `<child-comp>` is used in the template of `<app-comp>`\n * (i.e. a `ViewChild` of `<app-comp>`), calling `getOwningComponent` on `<child-comp>`\n * would return `<app-comp>`.\n *\n * @param elementOrDir DOM element, component or directive instance\n *    for which to retrieve the root components.\n * @returns Component instance whose view owns the DOM element or null if the element is not\n *    part of a component view.\n *\n * @publicApi\n * @globalApi ng\n */\nfunction getOwningComponent(elementOrDir) {\n    const context = loadLContext(elementOrDir, false);\n    if (context === null)\n        return null;\n    let lView = context.lView;\n    let parent;\n    ngDevMode && assertLView(lView);\n    while (lView[HOST] === null && (parent = getLViewParent(lView))) {\n        // As long as lView[HOST] is null we know we are part of sub-template such as `*ngIf`\n        lView = parent;\n    }\n    return lView[FLAGS] & 512 /* IsRoot */ ? null : lView[CONTEXT];\n}\n/**\n * Retrieves all root components associated with a DOM element, directive or component instance.\n * Root components are those which have been bootstrapped by Angular.\n *\n * @param elementOrDir DOM element, component or directive instance\n *    for which to retrieve the root components.\n * @returns Root components associated with the target object.\n *\n * @publicApi\n * @globalApi ng\n */\nfunction getRootComponents(elementOrDir) {\n    return [...getRootContext(elementOrDir).components];\n}\n/**\n * Retrieves an `Injector` associated with an element, component or directive instance.\n *\n * @param elementOrDir DOM element, component or directive instance for which to\n *    retrieve the injector.\n * @returns Injector associated with the element, component or directive instance.\n *\n * @publicApi\n * @globalApi ng\n */\nfunction getInjector(elementOrDir) {\n    const context = loadLContext(elementOrDir, false);\n    if (context === null)\n        return Injector.NULL;\n    const tNode = context.lView[TVIEW].data[context.nodeIndex];\n    return new NodeInjector(tNode, context.lView);\n}\n/**\n * Retrieve a set of injection tokens at a given DOM node.\n *\n * @param element Element for which the injection tokens should be retrieved.\n */\nfunction getInjectionTokens(element) {\n    const context = loadLContext(element, false);\n    if (context === null)\n        return [];\n    const lView = context.lView;\n    const tView = lView[TVIEW];\n    const tNode = tView.data[context.nodeIndex];\n    const providerTokens = [];\n    const startIndex = tNode.providerIndexes & 1048575 /* ProvidersStartIndexMask */;\n    const endIndex = tNode.directiveEnd;\n    for (let i = startIndex; i < endIndex; i++) {\n        let value = tView.data[i];\n        if (isDirectiveDefHack(value)) {\n            // The fact that we sometimes store Type and sometimes DirectiveDef in this location is a\n            // design flaw.  We should always store same type so that we can be monomorphic. The issue\n            // is that for Components/Directives we store the def instead the type. The correct behavior\n            // is that we should always be storing injectable type in this location.\n            value = value.type;\n        }\n        providerTokens.push(value);\n    }\n    return providerTokens;\n}\n/**\n * Retrieves directive instances associated with a given DOM element. Does not include\n * component instances.\n *\n * @usageNotes\n * Given the following DOM structure:\n * ```\n * <my-app>\n *   <button my-button></button>\n *   <my-comp></my-comp>\n * </my-app>\n * ```\n * Calling `getDirectives` on `<button>` will return an array with an instance of the `MyButton`\n * directive that is associated with the DOM element.\n *\n * Calling `getDirectives` on `<my-comp>` will return an empty array.\n *\n * @param element DOM element for which to get the directives.\n * @returns Array of directives associated with the element.\n *\n * @publicApi\n * @globalApi ng\n */\nfunction getDirectives(element) {\n    const context = loadLContext(element);\n    if (context.directives === undefined) {\n        context.directives = getDirectivesAtNodeIndex(context.nodeIndex, context.lView, false);\n    }\n    // The `directives` in this case are a named array called `LComponentView`. Clone the\n    // result so we don't expose an internal data structure in the user's console.\n    return context.directives === null ? [] : [...context.directives];\n}\nfunction loadLContext(target, throwOnNotFound = true) {\n    const context = getLContext(target);\n    if (!context && throwOnNotFound) {\n        throw new Error(ngDevMode ? `Unable to find context associated with ${stringifyForError(target)}` :\n            'Invalid ng target');\n    }\n    return context;\n}\n/**\n * Retrieve map of local references.\n *\n * The references are retrieved as a map of local reference name to element or directive instance.\n *\n * @param target DOM element, component or directive instance for which to retrieve\n *    the local references.\n */\nfunction getLocalRefs(target) {\n    const context = loadLContext(target, false);\n    if (context === null)\n        return {};\n    if (context.localRefs === undefined) {\n        context.localRefs = discoverLocalRefs(context.lView, context.nodeIndex);\n    }\n    return context.localRefs || {};\n}\n/**\n * Retrieves the host element of a component or directive instance.\n * The host element is the DOM element that matched the selector of the directive.\n *\n * @param componentOrDirective Component or directive instance for which the host\n *     element should be retrieved.\n * @returns Host element of the target.\n *\n * @publicApi\n * @globalApi ng\n */\nfunction getHostElement(componentOrDirective) {\n    return getLContext(componentOrDirective).native;\n}\n/**\n * Retrieves the rendered text for a given component.\n *\n * This function retrieves the host element of a component and\n * and then returns the `textContent` for that element. This implies\n * that the text returned will include re-projected content of\n * the component as well.\n *\n * @param component The component to return the content text for.\n */\nfunction getRenderedText(component) {\n    const hostElement = getHostElement(component);\n    return hostElement.textContent || '';\n}\nfunction loadLContextFromNode(node) {\n    if (!(node instanceof Node))\n        throw new Error('Expecting instance of DOM Element');\n    return loadLContext(node);\n}\n/**\n * Retrieves a list of event listeners associated with a DOM element. The list does include host\n * listeners, but it does not include event listeners defined outside of the Angular context\n * (e.g. through `addEventListener`).\n *\n * @usageNotes\n * Given the following DOM structure:\n * ```\n * <my-app>\n *   <div (click)=\"doSomething()\"></div>\n * </my-app>\n *\n * ```\n * Calling `getListeners` on `<div>` will return an object that looks as follows:\n * ```\n * {\n *   name: 'click',\n *   element: <div>,\n *   callback: () => doSomething(),\n *   useCapture: false\n * }\n * ```\n *\n * @param element Element for which the DOM listeners should be retrieved.\n * @returns Array of event listeners on the DOM element.\n *\n * @publicApi\n * @globalApi ng\n */\nfunction getListeners(element) {\n    assertDomElement(element);\n    const lContext = loadLContext(element, false);\n    if (lContext === null)\n        return [];\n    const lView = lContext.lView;\n    const tView = lView[TVIEW];\n    const lCleanup = lView[CLEANUP];\n    const tCleanup = tView.cleanup;\n    const listeners = [];\n    if (tCleanup && lCleanup) {\n        for (let i = 0; i < tCleanup.length;) {\n            const firstParam = tCleanup[i++];\n            const secondParam = tCleanup[i++];\n            if (typeof firstParam === 'string') {\n                const name = firstParam;\n                const listenerElement = unwrapRNode(lView[secondParam]);\n                const callback = lCleanup[tCleanup[i++]];\n                const useCaptureOrIndx = tCleanup[i++];\n                // if useCaptureOrIndx is boolean then report it as is.\n                // if useCaptureOrIndx is positive number then it in unsubscribe method\n                // if useCaptureOrIndx is negative number then it is a Subscription\n                const type = (typeof useCaptureOrIndx === 'boolean' || useCaptureOrIndx >= 0) ? 'dom' : 'output';\n                const useCapture = typeof useCaptureOrIndx === 'boolean' ? useCaptureOrIndx : false;\n                if (element == listenerElement) {\n                    listeners.push({ element, name, callback, useCapture, type });\n                }\n            }\n        }\n    }\n    listeners.sort(sortListeners);\n    return listeners;\n}\nfunction sortListeners(a, b) {\n    if (a.name == b.name)\n        return 0;\n    return a.name < b.name ? -1 : 1;\n}\n/**\n * This function should not exist because it is megamorphic and only mostly correct.\n *\n * See call site for more info.\n */\nfunction isDirectiveDefHack(obj) {\n    return obj.type !== undefined && obj.template !== undefined && obj.declaredInputs !== undefined;\n}\n/**\n * Returns the attached `DebugNode` instance for an element in the DOM.\n *\n * @param element DOM element which is owned by an existing component's view.\n */\nfunction getDebugNode(element) {\n    let debugNode = null;\n    const lContext = loadLContextFromNode(element);\n    const lView = lContext.lView;\n    const nodeIndex = lContext.nodeIndex;\n    if (nodeIndex !== -1) {\n        const valueInLView = lView[nodeIndex];\n        // this means that value in the lView is a component with its own\n        // data. In this situation the TNode is not accessed at the same spot.\n        const tNode = isLView(valueInLView) ? valueInLView[T_HOST] :\n            getTNode(lView[TVIEW], nodeIndex - HEADER_OFFSET);\n        debugNode = buildDebugNode(tNode, lView, nodeIndex);\n    }\n    return debugNode;\n}\n/**\n * Retrieve the component `LView` from component/element.\n *\n * NOTE: `LView` is a private and should not be leaked outside.\n *       Don't export this method to `ng.*` on window.\n *\n * @param target DOM element or component instance for which to retrieve the LView.\n */\nfunction getComponentLView(target) {\n    const lContext = loadLContext(target);\n    const nodeIndx = lContext.nodeIndex;\n    const lView = lContext.lView;\n    const componentLView = lView[nodeIndx];\n    ngDevMode && assertLView(componentLView);\n    return componentLView;\n}\n/** Asserts that a value is a DOM Element. */\nfunction assertDomElement(value) {\n    if (typeof Element !== 'undefined' && !(value instanceof Element)) {\n        throw new Error('Expecting instance of DOM Element');\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Marks a component for check (in case of OnPush components) and synchronously\n * performs change detection on the application this component belongs to.\n *\n * @param component Component to {@link ChangeDetectorRef#markForCheck mark for check}.\n *\n * @publicApi\n * @globalApi ng\n */\nfunction applyChanges(component) {\n    markDirty(component);\n    getRootComponents(component).forEach(rootComponent => detectChanges(rootComponent));\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * This file introduces series of globally accessible debug tools\n * to allow for the Angular debugging story to function.\n *\n * To see this in action run the following command:\n *\n *   bazel run --config=ivy\n *   //packages/core/test/bundling/todo:devserver\n *\n *  Then load `localhost:5432` and start using the console tools.\n */\n/**\n * This value reflects the property on the window where the dev\n * tools are patched (window.ng).\n * */\nconst GLOBAL_PUBLISH_EXPANDO_KEY = 'ng';\nlet _published = false;\n/**\n * Publishes a collection of default debug tools onto`window.ng`.\n *\n * These functions are available globally when Angular is in development\n * mode and are automatically stripped away from prod mode is on.\n */\nfunction publishDefaultGlobalUtils() {\n    if (!_published) {\n        _published = true;\n        publishGlobalUtil('getComponent', getComponent);\n        publishGlobalUtil('getContext', getContext);\n        publishGlobalUtil('getListeners', getListeners);\n        publishGlobalUtil('getOwningComponent', getOwningComponent);\n        publishGlobalUtil('getHostElement', getHostElement);\n        publishGlobalUtil('getInjector', getInjector);\n        publishGlobalUtil('getRootComponents', getRootComponents);\n        publishGlobalUtil('getDirectives', getDirectives);\n        publishGlobalUtil('applyChanges', applyChanges);\n    }\n}\n/**\n * Publishes the given function to `window.ng` so that it can be\n * used from the browser console when an application is not in production.\n */\nfunction publishGlobalUtil(name, fn) {\n    if (typeof COMPILED === 'undefined' || !COMPILED) {\n        // Note: we can't export `ng` when using closure enhanced optimization as:\n        // - closure declares globals itself for minified names, which sometimes clobber our `ng` global\n        // - we can't declare a closure extern as the namespace `ng` is already used within Google\n        //   for typings for AngularJS (via `goog.provide('ng....')`).\n        const w = _global;\n        ngDevMode && assertDefined(fn, 'function not defined');\n        if (w) {\n            let container = w[GLOBAL_PUBLISH_EXPANDO_KEY];\n            if (!container) {\n                container = w[GLOBAL_PUBLISH_EXPANDO_KEY] = {};\n            }\n            container[name] = fn;\n        }\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst ɵ0$b = (token, notFoundValue) => {\n    throw new Error('NullInjector: Not found: ' + stringifyForError(token));\n};\n// TODO: A hack to not pull in the NullInjector from @angular/core.\nconst NULL_INJECTOR$1 = {\n    get: ɵ0$b\n};\n/**\n * Bootstraps a Component into an existing host element and returns an instance\n * of the component.\n *\n * Use this function to bootstrap a component into the DOM tree. Each invocation\n * of this function will create a separate tree of components, injectors and\n * change detection cycles and lifetimes. To dynamically insert a new component\n * into an existing tree such that it shares the same injection, change detection\n * and object lifetime, use {@link ViewContainer#createComponent}.\n *\n * @param componentType Component to bootstrap\n * @param options Optional parameters which control bootstrapping\n */\nfunction renderComponent$1(componentType /* Type as workaround for: Microsoft/TypeScript/issues/4881 */, opts = {}) {\n    ngDevMode && publishDefaultGlobalUtils();\n    ngDevMode && assertComponentType(componentType);\n    const rendererFactory = opts.rendererFactory || domRendererFactory3;\n    const sanitizer = opts.sanitizer || null;\n    const componentDef = getComponentDef(componentType);\n    if (componentDef.type != componentType)\n        componentDef.type = componentType;\n    // The first index of the first selector is the tag name.\n    const componentTag = componentDef.selectors[0][0];\n    const hostRenderer = rendererFactory.createRenderer(null, null);\n    const hostRNode = locateHostElement(hostRenderer, opts.host || componentTag, componentDef.encapsulation);\n    const rootFlags = componentDef.onPush ? 64 /* Dirty */ | 512 /* IsRoot */ :\n        16 /* CheckAlways */ | 512 /* IsRoot */;\n    const rootContext = createRootContext(opts.scheduler, opts.playerHandler);\n    const renderer = rendererFactory.createRenderer(hostRNode, componentDef);\n    const rootTView = createTView(0 /* Root */, -1, null, 1, 0, null, null, null, null, null);\n    const rootView = createLView(null, rootTView, rootContext, rootFlags, null, null, rendererFactory, renderer, undefined, opts.injector || null);\n    enterView(rootView, null);\n    let component;\n    try {\n        if (rendererFactory.begin)\n            rendererFactory.begin();\n        const componentView = createRootComponentView(hostRNode, componentDef, rootView, rendererFactory, renderer, sanitizer);\n        component = createRootComponent(componentView, componentDef, rootView, rootContext, opts.hostFeatures || null);\n        // create mode pass\n        renderView(rootTView, rootView, null);\n        // update mode pass\n        refreshView(rootTView, rootView, null, null);\n    }\n    finally {\n        leaveView();\n        if (rendererFactory.end)\n            rendererFactory.end();\n    }\n    return component;\n}\n/**\n * Creates the root component view and the root component node.\n *\n * @param rNode Render host element.\n * @param def ComponentDef\n * @param rootView The parent view where the host node is stored\n * @param hostRenderer The current renderer\n * @param sanitizer The sanitizer, if provided\n *\n * @returns Component view created\n */\nfunction createRootComponentView(rNode, def, rootView, rendererFactory, hostRenderer, sanitizer) {\n    const tView = rootView[TVIEW];\n    ngDevMode && assertIndexInRange(rootView, 0 + HEADER_OFFSET);\n    rootView[0 + HEADER_OFFSET] = rNode;\n    const tNode = getOrCreateTNode(tView, null, 0, 3 /* Element */, null, null);\n    const mergedAttrs = tNode.mergedAttrs = def.hostAttrs;\n    if (mergedAttrs !== null) {\n        computeStaticStyling(tNode, mergedAttrs, true);\n        if (rNode !== null) {\n            setUpAttributes(hostRenderer, rNode, mergedAttrs);\n            if (tNode.classes !== null) {\n                writeDirectClass(hostRenderer, rNode, tNode.classes);\n            }\n            if (tNode.styles !== null) {\n                writeDirectStyle(hostRenderer, rNode, tNode.styles);\n            }\n        }\n    }\n    const viewRenderer = rendererFactory.createRenderer(rNode, def);\n    const componentView = createLView(rootView, getOrCreateTComponentView(def), null, def.onPush ? 64 /* Dirty */ : 16 /* CheckAlways */, rootView[HEADER_OFFSET], tNode, rendererFactory, viewRenderer, sanitizer);\n    if (tView.firstCreatePass) {\n        diPublicInInjector(getOrCreateNodeInjectorForNode(tNode, rootView), tView, def.type);\n        markAsComponentHost(tView, tNode);\n        initTNodeFlags(tNode, rootView.length, 1);\n    }\n    addToViewTree(rootView, componentView);\n    // Store component view at node index, with node as the HOST\n    return rootView[HEADER_OFFSET] = componentView;\n}\n/**\n * Creates a root component and sets it up with features and host bindings. Shared by\n * renderComponent() and ViewContainerRef.createComponent().\n */\nfunction createRootComponent(componentView, componentDef, rootLView, rootContext, hostFeatures) {\n    const tView = rootLView[TVIEW];\n    // Create directive instance with factory() and store at next index in viewData\n    const component = instantiateRootComponent(tView, rootLView, componentDef);\n    rootContext.components.push(component);\n    componentView[CONTEXT] = component;\n    hostFeatures && hostFeatures.forEach((feature) => feature(component, componentDef));\n    // We want to generate an empty QueryList for root content queries for backwards\n    // compatibility with ViewEngine.\n    if (componentDef.contentQueries) {\n        componentDef.contentQueries(1 /* Create */, component, rootLView.length - 1);\n    }\n    const rootTNode = getPreviousOrParentTNode();\n    if (tView.firstCreatePass &&\n        (componentDef.hostBindings !== null || componentDef.hostAttrs !== null)) {\n        const elementIndex = rootTNode.index - HEADER_OFFSET;\n        setSelectedIndex(elementIndex);\n        const rootTView = rootLView[TVIEW];\n        addHostBindingsToExpandoInstructions(rootTView, componentDef);\n        growHostVarsSpace(rootTView, rootLView, componentDef.hostVars);\n        invokeHostBindingsInCreationMode(componentDef, component);\n    }\n    return component;\n}\nfunction createRootContext(scheduler, playerHandler) {\n    return {\n        components: [],\n        scheduler: scheduler || defaultScheduler,\n        clean: CLEAN_PROMISE,\n        playerHandler: playerHandler || null,\n        flags: 0 /* Empty */\n    };\n}\n/**\n * Used to enable lifecycle hooks on the root component.\n *\n * Include this feature when calling `renderComponent` if the root component\n * you are rendering has lifecycle hooks defined. Otherwise, the hooks won't\n * be called properly.\n *\n * Example:\n *\n * ```\n * renderComponent(AppComponent, {hostFeatures: [LifecycleHooksFeature]});\n * ```\n */\nfunction LifecycleHooksFeature(component, def) {\n    const rootTView = readPatchedLView(component)[TVIEW];\n    const dirIndex = rootTView.data.length - 1;\n    // TODO(misko): replace `as TNode` with createTNode call. (needs refactoring to lose dep on\n    // LNode).\n    registerPostOrderHooks(rootTView, { directiveStart: dirIndex, directiveEnd: dirIndex + 1 });\n}\n/**\n * Wait on component until it is rendered.\n *\n * This function returns a `Promise` which is resolved when the component's\n * change detection is executed. This is determined by finding the scheduler\n * associated with the `component`'s render tree and waiting until the scheduler\n * flushes. If nothing is scheduled, the function returns a resolved promise.\n *\n * Example:\n * ```\n * await whenRendered(myComponent);\n * ```\n *\n * @param component Component to wait upon\n * @returns Promise which resolves when the component is rendered.\n */\nfunction whenRendered(component) {\n    return getRootContext(component).clean;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction getSuperType(type) {\n    return Object.getPrototypeOf(type.prototype).constructor;\n}\n/**\n * Merges the definition from a super class to a sub class.\n * @param definition The definition that is a SubClass of another directive of component\n *\n * @codeGenApi\n */\nfunction ɵɵInheritDefinitionFeature(definition) {\n    let superType = getSuperType(definition.type);\n    let shouldInheritFields = true;\n    const inheritanceChain = [definition];\n    while (superType) {\n        let superDef = undefined;\n        if (isComponentDef(definition)) {\n            // Don't use getComponentDef/getDirectiveDef. This logic relies on inheritance.\n            superDef = superType.ɵcmp || superType.ɵdir;\n        }\n        else {\n            if (superType.ɵcmp) {\n                throw new Error('Directives cannot inherit Components');\n            }\n            // Don't use getComponentDef/getDirectiveDef. This logic relies on inheritance.\n            superDef = superType.ɵdir;\n        }\n        if (superDef) {\n            if (shouldInheritFields) {\n                inheritanceChain.push(superDef);\n                // Some fields in the definition may be empty, if there were no values to put in them that\n                // would've justified object creation. Unwrap them if necessary.\n                const writeableDef = definition;\n                writeableDef.inputs = maybeUnwrapEmpty(definition.inputs);\n                writeableDef.declaredInputs = maybeUnwrapEmpty(definition.declaredInputs);\n                writeableDef.outputs = maybeUnwrapEmpty(definition.outputs);\n                // Merge hostBindings\n                const superHostBindings = superDef.hostBindings;\n                superHostBindings && inheritHostBindings(definition, superHostBindings);\n                // Merge queries\n                const superViewQuery = superDef.viewQuery;\n                const superContentQueries = superDef.contentQueries;\n                superViewQuery && inheritViewQuery(definition, superViewQuery);\n                superContentQueries && inheritContentQueries(definition, superContentQueries);\n                // Merge inputs and outputs\n                fillProperties(definition.inputs, superDef.inputs);\n                fillProperties(definition.declaredInputs, superDef.declaredInputs);\n                fillProperties(definition.outputs, superDef.outputs);\n                // Merge animations metadata.\n                // If `superDef` is a Component, the `data` field is present (defaults to an empty object).\n                if (isComponentDef(superDef) && superDef.data.animation) {\n                    // If super def is a Component, the `definition` is also a Component, since Directives can\n                    // not inherit Components (we throw an error above and cannot reach this code).\n                    const defData = definition.data;\n                    defData.animation = (defData.animation || []).concat(superDef.data.animation);\n                }\n            }\n            // Run parent features\n            const features = superDef.features;\n            if (features) {\n                for (let i = 0; i < features.length; i++) {\n                    const feature = features[i];\n                    if (feature && feature.ngInherit) {\n                        feature(definition);\n                    }\n                    // If `InheritDefinitionFeature` is a part of the current `superDef`, it means that this\n                    // def already has all the necessary information inherited from its super class(es), so we\n                    // can stop merging fields from super classes. However we need to iterate through the\n                    // prototype chain to look for classes that might contain other \"features\" (like\n                    // NgOnChanges), which we should invoke for the original `definition`. We set the\n                    // `shouldInheritFields` flag to indicate that, essentially skipping fields inheritance\n                    // logic and only invoking functions from the \"features\" list.\n                    if (feature === ɵɵInheritDefinitionFeature) {\n                        shouldInheritFields = false;\n                    }\n                }\n            }\n        }\n        superType = Object.getPrototypeOf(superType);\n    }\n    mergeHostAttrsAcrossInheritance(inheritanceChain);\n}\n/**\n * Merge the `hostAttrs` and `hostVars` from the inherited parent to the base class.\n *\n * @param inheritanceChain A list of `WritableDefs` starting at the top most type and listing\n * sub-types in order. For each type take the `hostAttrs` and `hostVars` and merge it with the child\n * type.\n */\nfunction mergeHostAttrsAcrossInheritance(inheritanceChain) {\n    let hostVars = 0;\n    let hostAttrs = null;\n    // We process the inheritance order from the base to the leaves here.\n    for (let i = inheritanceChain.length - 1; i >= 0; i--) {\n        const def = inheritanceChain[i];\n        // For each `hostVars`, we need to add the superclass amount.\n        def.hostVars = (hostVars += def.hostVars);\n        // for each `hostAttrs` we need to merge it with superclass.\n        def.hostAttrs =\n            mergeHostAttrs(def.hostAttrs, hostAttrs = mergeHostAttrs(hostAttrs, def.hostAttrs));\n    }\n}\nfunction maybeUnwrapEmpty(value) {\n    if (value === EMPTY_OBJ) {\n        return {};\n    }\n    else if (value === EMPTY_ARRAY) {\n        return [];\n    }\n    else {\n        return value;\n    }\n}\nfunction inheritViewQuery(definition, superViewQuery) {\n    const prevViewQuery = definition.viewQuery;\n    if (prevViewQuery) {\n        definition.viewQuery = (rf, ctx) => {\n            superViewQuery(rf, ctx);\n            prevViewQuery(rf, ctx);\n        };\n    }\n    else {\n        definition.viewQuery = superViewQuery;\n    }\n}\nfunction inheritContentQueries(definition, superContentQueries) {\n    const prevContentQueries = definition.contentQueries;\n    if (prevContentQueries) {\n        definition.contentQueries = (rf, ctx, directiveIndex) => {\n            superContentQueries(rf, ctx, directiveIndex);\n            prevContentQueries(rf, ctx, directiveIndex);\n        };\n    }\n    else {\n        definition.contentQueries = superContentQueries;\n    }\n}\nfunction inheritHostBindings(definition, superHostBindings) {\n    const prevHostBindings = definition.hostBindings;\n    if (prevHostBindings) {\n        definition.hostBindings = (rf, ctx) => {\n            superHostBindings(rf, ctx);\n            prevHostBindings(rf, ctx);\n        };\n    }\n    else {\n        definition.hostBindings = superHostBindings;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Fields which exist on either directive or component definitions, and need to be copied from\n * parent to child classes by the `ɵɵCopyDefinitionFeature`.\n */\nconst COPY_DIRECTIVE_FIELDS = [\n    // The child class should use the providers of its parent.\n    'providersResolver',\n];\n/**\n * Fields which exist only on component definitions, and need to be copied from parent to child\n * classes by the `ɵɵCopyDefinitionFeature`.\n *\n * The type here allows any field of `ComponentDef` which is not also a property of `DirectiveDef`,\n * since those should go in `COPY_DIRECTIVE_FIELDS` above.\n */\nconst COPY_COMPONENT_FIELDS = [\n    // The child class should use the template function of its parent, including all template\n    // semantics.\n    'template',\n    'decls',\n    'consts',\n    'vars',\n    'onPush',\n    'ngContentSelectors',\n    // The child class should use the CSS styles of its parent, including all styling semantics.\n    'styles',\n    'encapsulation',\n    // The child class should be checked by the runtime in the same way as its parent.\n    'schemas',\n];\n/**\n * Copies the fields not handled by the `ɵɵInheritDefinitionFeature` from the supertype of a\n * definition.\n *\n * This exists primarily to support ngcc migration of an existing View Engine pattern, where an\n * entire decorator is inherited from a parent to a child class. When ngcc detects this case, it\n * generates a skeleton definition on the child class, and applies this feature.\n *\n * The `ɵɵCopyDefinitionFeature` then copies any needed fields from the parent class' definition,\n * including things like the component template function.\n *\n * @param definition The definition of a child class which inherits from a parent class with its\n * own definition.\n *\n * @codeGenApi\n */\nfunction ɵɵCopyDefinitionFeature(definition) {\n    let superType = getSuperType(definition.type);\n    let superDef = undefined;\n    if (isComponentDef(definition)) {\n        // Don't use getComponentDef/getDirectiveDef. This logic relies on inheritance.\n        superDef = superType.ɵcmp;\n    }\n    else {\n        // Don't use getComponentDef/getDirectiveDef. This logic relies on inheritance.\n        superDef = superType.ɵdir;\n    }\n    // Needed because `definition` fields are readonly.\n    const defAny = definition;\n    // Copy over any fields that apply to either directives or components.\n    for (const field of COPY_DIRECTIVE_FIELDS) {\n        defAny[field] = superDef[field];\n    }\n    if (isComponentDef(superDef)) {\n        // Copy over any component-specific fields.\n        for (const field of COPY_COMPONENT_FIELDS) {\n            defAny[field] = superDef[field];\n        }\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nlet _symbolIterator = null;\nfunction getSymbolIterator() {\n    if (!_symbolIterator) {\n        const Symbol = _global['Symbol'];\n        if (Symbol && Symbol.iterator) {\n            _symbolIterator = Symbol.iterator;\n        }\n        else {\n            // es6-shim specific logic\n            const keys = Object.getOwnPropertyNames(Map.prototype);\n            for (let i = 0; i < keys.length; ++i) {\n                const key = keys[i];\n                if (key !== 'entries' && key !== 'size' &&\n                    Map.prototype[key] === Map.prototype['entries']) {\n                    _symbolIterator = key;\n                }\n            }\n        }\n    }\n    return _symbolIterator;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction devModeEqual(a, b) {\n    const isListLikeIterableA = isListLikeIterable(a);\n    const isListLikeIterableB = isListLikeIterable(b);\n    if (isListLikeIterableA && isListLikeIterableB) {\n        return areIterablesEqual(a, b, devModeEqual);\n    }\n    else {\n        const isAObject = a && (typeof a === 'object' || typeof a === 'function');\n        const isBObject = b && (typeof b === 'object' || typeof b === 'function');\n        if (!isListLikeIterableA && isAObject && !isListLikeIterableB && isBObject) {\n            return true;\n        }\n        else {\n            return Object.is(a, b);\n        }\n    }\n}\n/**\n * Indicates that the result of a {@link Pipe} transformation has changed even though the\n * reference has not changed.\n *\n * Wrapped values are unwrapped automatically during the change detection, and the unwrapped value\n * is stored.\n *\n * Example:\n *\n * ```\n * if (this._latestValue === this._latestReturnedValue) {\n *    return this._latestReturnedValue;\n *  } else {\n *    this._latestReturnedValue = this._latestValue;\n *    return WrappedValue.wrap(this._latestValue); // this will force update\n *  }\n * ```\n *\n * @publicApi\n * @deprecated from v10 stop using. (No replacement, deemed unnecessary.)\n */\nclass WrappedValue {\n    constructor(value) {\n        this.wrapped = value;\n    }\n    /** Creates a wrapped value. */\n    static wrap(value) {\n        return new WrappedValue(value);\n    }\n    /**\n     * Returns the underlying value of a wrapped value.\n     * Returns the given `value` when it is not wrapped.\n     **/\n    static unwrap(value) {\n        return WrappedValue.isWrapped(value) ? value.wrapped : value;\n    }\n    /** Returns true if `value` is a wrapped value. */\n    static isWrapped(value) {\n        return value instanceof WrappedValue;\n    }\n}\nfunction isListLikeIterable(obj) {\n    if (!isJsObject(obj))\n        return false;\n    return Array.isArray(obj) ||\n        (!(obj instanceof Map) && // JS Map are iterables but return entries as [k, v]\n            getSymbolIterator() in obj); // JS Iterable have a Symbol.iterator prop\n}\nfunction areIterablesEqual(a, b, comparator) {\n    const iterator1 = a[getSymbolIterator()]();\n    const iterator2 = b[getSymbolIterator()]();\n    while (true) {\n        const item1 = iterator1.next();\n        const item2 = iterator2.next();\n        if (item1.done && item2.done)\n            return true;\n        if (item1.done || item2.done)\n            return false;\n        if (!comparator(item1.value, item2.value))\n            return false;\n    }\n}\nfunction iterateListLike(obj, fn) {\n    if (Array.isArray(obj)) {\n        for (let i = 0; i < obj.length; i++) {\n            fn(obj[i]);\n        }\n    }\n    else {\n        const iterator = obj[getSymbolIterator()]();\n        let item;\n        while (!((item = iterator.next()).done)) {\n            fn(item.value);\n        }\n    }\n}\nfunction isJsObject(o) {\n    return o !== null && (typeof o === 'function' || typeof o === 'object');\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// TODO(misko): consider inlining\n/** Updates binding and returns the value. */\nfunction updateBinding(lView, bindingIndex, value) {\n    return lView[bindingIndex] = value;\n}\n/** Gets the current binding value. */\nfunction getBinding(lView, bindingIndex) {\n    ngDevMode && assertIndexInRange(lView, bindingIndex);\n    ngDevMode &&\n        assertNotSame(lView[bindingIndex], NO_CHANGE, 'Stored value should never be NO_CHANGE.');\n    return lView[bindingIndex];\n}\n/**\n * Updates binding if changed, then returns whether it was updated.\n *\n * This function also checks the `CheckNoChangesMode` and throws if changes are made.\n * Some changes (Objects/iterables) during `CheckNoChangesMode` are exempt to comply with VE\n * behavior.\n *\n * @param lView current `LView`\n * @param bindingIndex The binding in the `LView` to check\n * @param value New value to check against `lView[bindingIndex]`\n * @returns `true` if the bindings has changed. (Throws if binding has changed during\n *          `CheckNoChangesMode`)\n */\nfunction bindingUpdated(lView, bindingIndex, value) {\n    ngDevMode && assertNotSame(value, NO_CHANGE, 'Incoming value should never be NO_CHANGE.');\n    ngDevMode &&\n        assertLessThan(bindingIndex, lView.length, `Slot should have been initialized to NO_CHANGE`);\n    const oldValue = lView[bindingIndex];\n    if (Object.is(oldValue, value)) {\n        return false;\n    }\n    else {\n        if (ngDevMode && getCheckNoChangesMode()) {\n            // View engine didn't report undefined values as changed on the first checkNoChanges pass\n            // (before the change detection was run).\n            const oldValueToCompare = oldValue !== NO_CHANGE ? oldValue : undefined;\n            if (!devModeEqual(oldValueToCompare, value)) {\n                const details = getExpressionChangedErrorDetails(lView, bindingIndex, oldValueToCompare, value);\n                throwErrorIfNoChangesMode(oldValue === NO_CHANGE, details.oldValue, details.newValue, details.propName);\n            }\n            // There was a change, but the `devModeEqual` decided that the change is exempt from an error.\n            // For this reason we exit as if no change. The early exit is needed to prevent the changed\n            // value to be written into `LView` (If we would write the new value that we would not see it\n            // as change on next CD.)\n            return false;\n        }\n        lView[bindingIndex] = value;\n        return true;\n    }\n}\n/** Updates 2 bindings if changed, then returns whether either was updated. */\nfunction bindingUpdated2(lView, bindingIndex, exp1, exp2) {\n    const different = bindingUpdated(lView, bindingIndex, exp1);\n    return bindingUpdated(lView, bindingIndex + 1, exp2) || different;\n}\n/** Updates 3 bindings if changed, then returns whether any was updated. */\nfunction bindingUpdated3(lView, bindingIndex, exp1, exp2, exp3) {\n    const different = bindingUpdated2(lView, bindingIndex, exp1, exp2);\n    return bindingUpdated(lView, bindingIndex + 2, exp3) || different;\n}\n/** Updates 4 bindings if changed, then returns whether any was updated. */\nfunction bindingUpdated4(lView, bindingIndex, exp1, exp2, exp3, exp4) {\n    const different = bindingUpdated2(lView, bindingIndex, exp1, exp2);\n    return bindingUpdated2(lView, bindingIndex + 2, exp3, exp4) || different;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Updates the value of or removes a bound attribute on an Element.\n *\n * Used in the case of `[attr.title]=\"value\"`\n *\n * @param name name The name of the attribute.\n * @param value value The attribute is removed when value is `null` or `undefined`.\n *                  Otherwise the attribute value is set to the stringified value.\n * @param sanitizer An optional function used to sanitize the value.\n * @param namespace Optional namespace to use when setting the attribute.\n *\n * @codeGenApi\n */\nfunction ɵɵattribute(name, value, sanitizer, namespace) {\n    const lView = getLView();\n    const bindingIndex = nextBindingIndex();\n    if (bindingUpdated(lView, bindingIndex, value)) {\n        const tView = getTView();\n        const tNode = getSelectedTNode();\n        elementAttributeInternal(tNode, lView, name, value, sanitizer, namespace);\n        ngDevMode && storePropertyBindingMetadata(tView.data, tNode, 'attr.' + name, bindingIndex);\n    }\n    return ɵɵattribute;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Create interpolation bindings with a variable number of expressions.\n *\n * If there are 1 to 8 expressions `interpolation1()` to `interpolation8()` should be used instead.\n * Those are faster because there is no need to create an array of expressions and iterate over it.\n *\n * `values`:\n * - has static text at even indexes,\n * - has evaluated expressions at odd indexes.\n *\n * Returns the concatenated string when any of the arguments changes, `NO_CHANGE` otherwise.\n */\nfunction interpolationV(lView, values) {\n    ngDevMode && assertLessThan(2, values.length, 'should have at least 3 values');\n    ngDevMode && assertEqual(values.length % 2, 1, 'should have an odd number of values');\n    let isBindingUpdated = false;\n    let bindingIndex = getBindingIndex();\n    for (let i = 1; i < values.length; i += 2) {\n        // Check if bindings (odd indexes) have changed\n        isBindingUpdated = bindingUpdated(lView, bindingIndex++, values[i]) || isBindingUpdated;\n    }\n    setBindingIndex(bindingIndex);\n    if (!isBindingUpdated) {\n        return NO_CHANGE;\n    }\n    // Build the updated content\n    let content = values[0];\n    for (let i = 1; i < values.length; i += 2) {\n        content += renderStringify(values[i]) + values[i + 1];\n    }\n    return content;\n}\n/**\n * Creates an interpolation binding with 1 expression.\n *\n * @param prefix static value used for concatenation only.\n * @param v0 value checked for change.\n * @param suffix static value used for concatenation only.\n */\nfunction interpolation1(lView, prefix, v0, suffix) {\n    const different = bindingUpdated(lView, nextBindingIndex(), v0);\n    return different ? prefix + renderStringify(v0) + suffix : NO_CHANGE;\n}\n/**\n * Creates an interpolation binding with 2 expressions.\n */\nfunction interpolation2(lView, prefix, v0, i0, v1, suffix) {\n    const bindingIndex = getBindingIndex();\n    const different = bindingUpdated2(lView, bindingIndex, v0, v1);\n    incrementBindingIndex(2);\n    return different ? prefix + renderStringify(v0) + i0 + renderStringify(v1) + suffix : NO_CHANGE;\n}\n/**\n * Creates an interpolation binding with 3 expressions.\n */\nfunction interpolation3(lView, prefix, v0, i0, v1, i1, v2, suffix) {\n    const bindingIndex = getBindingIndex();\n    const different = bindingUpdated3(lView, bindingIndex, v0, v1, v2);\n    incrementBindingIndex(3);\n    return different ?\n        prefix + renderStringify(v0) + i0 + renderStringify(v1) + i1 + renderStringify(v2) + suffix :\n        NO_CHANGE;\n}\n/**\n * Create an interpolation binding with 4 expressions.\n */\nfunction interpolation4(lView, prefix, v0, i0, v1, i1, v2, i2, v3, suffix) {\n    const bindingIndex = getBindingIndex();\n    const different = bindingUpdated4(lView, bindingIndex, v0, v1, v2, v3);\n    incrementBindingIndex(4);\n    return different ? prefix + renderStringify(v0) + i0 + renderStringify(v1) + i1 +\n        renderStringify(v2) + i2 + renderStringify(v3) + suffix :\n        NO_CHANGE;\n}\n/**\n * Creates an interpolation binding with 5 expressions.\n */\nfunction interpolation5(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, suffix) {\n    const bindingIndex = getBindingIndex();\n    let different = bindingUpdated4(lView, bindingIndex, v0, v1, v2, v3);\n    different = bindingUpdated(lView, bindingIndex + 4, v4) || different;\n    incrementBindingIndex(5);\n    return different ? prefix + renderStringify(v0) + i0 + renderStringify(v1) + i1 +\n        renderStringify(v2) + i2 + renderStringify(v3) + i3 + renderStringify(v4) + suffix :\n        NO_CHANGE;\n}\n/**\n * Creates an interpolation binding with 6 expressions.\n */\nfunction interpolation6(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, suffix) {\n    const bindingIndex = getBindingIndex();\n    let different = bindingUpdated4(lView, bindingIndex, v0, v1, v2, v3);\n    different = bindingUpdated2(lView, bindingIndex + 4, v4, v5) || different;\n    incrementBindingIndex(6);\n    return different ?\n        prefix + renderStringify(v0) + i0 + renderStringify(v1) + i1 + renderStringify(v2) + i2 +\n            renderStringify(v3) + i3 + renderStringify(v4) + i4 + renderStringify(v5) + suffix :\n        NO_CHANGE;\n}\n/**\n * Creates an interpolation binding with 7 expressions.\n */\nfunction interpolation7(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, suffix) {\n    const bindingIndex = getBindingIndex();\n    let different = bindingUpdated4(lView, bindingIndex, v0, v1, v2, v3);\n    different = bindingUpdated3(lView, bindingIndex + 4, v4, v5, v6) || different;\n    incrementBindingIndex(7);\n    return different ? prefix + renderStringify(v0) + i0 + renderStringify(v1) + i1 +\n        renderStringify(v2) + i2 + renderStringify(v3) + i3 + renderStringify(v4) + i4 +\n        renderStringify(v5) + i5 + renderStringify(v6) + suffix :\n        NO_CHANGE;\n}\n/**\n * Creates an interpolation binding with 8 expressions.\n */\nfunction interpolation8(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, i6, v7, suffix) {\n    const bindingIndex = getBindingIndex();\n    let different = bindingUpdated4(lView, bindingIndex, v0, v1, v2, v3);\n    different = bindingUpdated4(lView, bindingIndex + 4, v4, v5, v6, v7) || different;\n    incrementBindingIndex(8);\n    return different ? prefix + renderStringify(v0) + i0 + renderStringify(v1) + i1 +\n        renderStringify(v2) + i2 + renderStringify(v3) + i3 + renderStringify(v4) + i4 +\n        renderStringify(v5) + i5 + renderStringify(v6) + i6 + renderStringify(v7) + suffix :\n        NO_CHANGE;\n}\n\n/**\n *\n * Update an interpolated attribute on an element with single bound value surrounded by text.\n *\n * Used when the value passed to a property has 1 interpolated value in it:\n *\n * ```html\n * <div attr.title=\"prefix{{v0}}suffix\"></div>\n * ```\n *\n * Its compiled representation is::\n *\n * ```ts\n * ɵɵattributeInterpolate1('title', 'prefix', v0, 'suffix');\n * ```\n *\n * @param attrName The name of the attribute to update\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param sanitizer An optional sanitizer function\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵattributeInterpolate1(attrName, prefix, v0, suffix, sanitizer, namespace) {\n    const lView = getLView();\n    const interpolatedValue = interpolation1(lView, prefix, v0, suffix);\n    if (interpolatedValue !== NO_CHANGE) {\n        const tNode = getSelectedTNode();\n        elementAttributeInternal(tNode, lView, attrName, interpolatedValue, sanitizer, namespace);\n        ngDevMode &&\n            storePropertyBindingMetadata(getTView().data, tNode, 'attr.' + attrName, getBindingIndex() - 1, prefix, suffix);\n    }\n    return ɵɵattributeInterpolate1;\n}\n/**\n *\n * Update an interpolated attribute on an element with 2 bound values surrounded by text.\n *\n * Used when the value passed to a property has 2 interpolated values in it:\n *\n * ```html\n * <div attr.title=\"prefix{{v0}}-{{v1}}suffix\"></div>\n * ```\n *\n * Its compiled representation is::\n *\n * ```ts\n * ɵɵattributeInterpolate2('title', 'prefix', v0, '-', v1, 'suffix');\n * ```\n *\n * @param attrName The name of the attribute to update\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param sanitizer An optional sanitizer function\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵattributeInterpolate2(attrName, prefix, v0, i0, v1, suffix, sanitizer, namespace) {\n    const lView = getLView();\n    const interpolatedValue = interpolation2(lView, prefix, v0, i0, v1, suffix);\n    if (interpolatedValue !== NO_CHANGE) {\n        const tNode = getSelectedTNode();\n        elementAttributeInternal(tNode, lView, attrName, interpolatedValue, sanitizer, namespace);\n        ngDevMode &&\n            storePropertyBindingMetadata(getTView().data, tNode, 'attr.' + attrName, getBindingIndex() - 2, prefix, i0, suffix);\n    }\n    return ɵɵattributeInterpolate2;\n}\n/**\n *\n * Update an interpolated attribute on an element with 3 bound values surrounded by text.\n *\n * Used when the value passed to a property has 3 interpolated values in it:\n *\n * ```html\n * <div attr.title=\"prefix{{v0}}-{{v1}}-{{v2}}suffix\"></div>\n * ```\n *\n * Its compiled representation is::\n *\n * ```ts\n * ɵɵattributeInterpolate3(\n * 'title', 'prefix', v0, '-', v1, '-', v2, 'suffix');\n * ```\n *\n * @param attrName The name of the attribute to update\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param sanitizer An optional sanitizer function\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵattributeInterpolate3(attrName, prefix, v0, i0, v1, i1, v2, suffix, sanitizer, namespace) {\n    const lView = getLView();\n    const interpolatedValue = interpolation3(lView, prefix, v0, i0, v1, i1, v2, suffix);\n    if (interpolatedValue !== NO_CHANGE) {\n        const tNode = getSelectedTNode();\n        elementAttributeInternal(tNode, lView, attrName, interpolatedValue, sanitizer, namespace);\n        ngDevMode &&\n            storePropertyBindingMetadata(getTView().data, tNode, 'attr.' + attrName, getBindingIndex() - 3, prefix, i0, i1, suffix);\n    }\n    return ɵɵattributeInterpolate3;\n}\n/**\n *\n * Update an interpolated attribute on an element with 4 bound values surrounded by text.\n *\n * Used when the value passed to a property has 4 interpolated values in it:\n *\n * ```html\n * <div attr.title=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}suffix\"></div>\n * ```\n *\n * Its compiled representation is::\n *\n * ```ts\n * ɵɵattributeInterpolate4(\n * 'title', 'prefix', v0, '-', v1, '-', v2, '-', v3, 'suffix');\n * ```\n *\n * @param attrName The name of the attribute to update\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param sanitizer An optional sanitizer function\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵattributeInterpolate4(attrName, prefix, v0, i0, v1, i1, v2, i2, v3, suffix, sanitizer, namespace) {\n    const lView = getLView();\n    const interpolatedValue = interpolation4(lView, prefix, v0, i0, v1, i1, v2, i2, v3, suffix);\n    if (interpolatedValue !== NO_CHANGE) {\n        const tNode = getSelectedTNode();\n        elementAttributeInternal(tNode, lView, attrName, interpolatedValue, sanitizer, namespace);\n        ngDevMode &&\n            storePropertyBindingMetadata(getTView().data, tNode, 'attr.' + attrName, getBindingIndex() - 4, prefix, i0, i1, i2, suffix);\n    }\n    return ɵɵattributeInterpolate4;\n}\n/**\n *\n * Update an interpolated attribute on an element with 5 bound values surrounded by text.\n *\n * Used when the value passed to a property has 5 interpolated values in it:\n *\n * ```html\n * <div attr.title=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}suffix\"></div>\n * ```\n *\n * Its compiled representation is::\n *\n * ```ts\n * ɵɵattributeInterpolate5(\n * 'title', 'prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, 'suffix');\n * ```\n *\n * @param attrName The name of the attribute to update\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param i3 Static value used for concatenation only.\n * @param v4 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param sanitizer An optional sanitizer function\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵattributeInterpolate5(attrName, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, suffix, sanitizer, namespace) {\n    const lView = getLView();\n    const interpolatedValue = interpolation5(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, suffix);\n    if (interpolatedValue !== NO_CHANGE) {\n        const tNode = getSelectedTNode();\n        elementAttributeInternal(tNode, lView, attrName, interpolatedValue, sanitizer, namespace);\n        ngDevMode &&\n            storePropertyBindingMetadata(getTView().data, tNode, 'attr.' + attrName, getBindingIndex() - 5, prefix, i0, i1, i2, i3, suffix);\n    }\n    return ɵɵattributeInterpolate5;\n}\n/**\n *\n * Update an interpolated attribute on an element with 6 bound values surrounded by text.\n *\n * Used when the value passed to a property has 6 interpolated values in it:\n *\n * ```html\n * <div attr.title=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}-{{v5}}suffix\"></div>\n * ```\n *\n * Its compiled representation is::\n *\n * ```ts\n * ɵɵattributeInterpolate6(\n *    'title', 'prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, '-', v5, 'suffix');\n * ```\n *\n * @param attrName The name of the attribute to update\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param i3 Static value used for concatenation only.\n * @param v4 Value checked for change.\n * @param i4 Static value used for concatenation only.\n * @param v5 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param sanitizer An optional sanitizer function\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵattributeInterpolate6(attrName, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, suffix, sanitizer, namespace) {\n    const lView = getLView();\n    const interpolatedValue = interpolation6(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, suffix);\n    if (interpolatedValue !== NO_CHANGE) {\n        const tNode = getSelectedTNode();\n        elementAttributeInternal(tNode, lView, attrName, interpolatedValue, sanitizer, namespace);\n        ngDevMode &&\n            storePropertyBindingMetadata(getTView().data, tNode, 'attr.' + attrName, getBindingIndex() - 6, prefix, i0, i1, i2, i3, i4, suffix);\n    }\n    return ɵɵattributeInterpolate6;\n}\n/**\n *\n * Update an interpolated attribute on an element with 7 bound values surrounded by text.\n *\n * Used when the value passed to a property has 7 interpolated values in it:\n *\n * ```html\n * <div attr.title=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}-{{v5}}-{{v6}}suffix\"></div>\n * ```\n *\n * Its compiled representation is::\n *\n * ```ts\n * ɵɵattributeInterpolate7(\n *    'title', 'prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, '-', v5, '-', v6, 'suffix');\n * ```\n *\n * @param attrName The name of the attribute to update\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param i3 Static value used for concatenation only.\n * @param v4 Value checked for change.\n * @param i4 Static value used for concatenation only.\n * @param v5 Value checked for change.\n * @param i5 Static value used for concatenation only.\n * @param v6 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param sanitizer An optional sanitizer function\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵattributeInterpolate7(attrName, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, suffix, sanitizer, namespace) {\n    const lView = getLView();\n    const interpolatedValue = interpolation7(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, suffix);\n    if (interpolatedValue !== NO_CHANGE) {\n        const tNode = getSelectedTNode();\n        elementAttributeInternal(tNode, lView, attrName, interpolatedValue, sanitizer, namespace);\n        ngDevMode &&\n            storePropertyBindingMetadata(getTView().data, tNode, 'attr.' + attrName, getBindingIndex() - 7, prefix, i0, i1, i2, i3, i4, i5, suffix);\n    }\n    return ɵɵattributeInterpolate7;\n}\n/**\n *\n * Update an interpolated attribute on an element with 8 bound values surrounded by text.\n *\n * Used when the value passed to a property has 8 interpolated values in it:\n *\n * ```html\n * <div attr.title=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}-{{v5}}-{{v6}}-{{v7}}suffix\"></div>\n * ```\n *\n * Its compiled representation is::\n *\n * ```ts\n * ɵɵattributeInterpolate8(\n *  'title', 'prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, '-', v5, '-', v6, '-', v7, 'suffix');\n * ```\n *\n * @param attrName The name of the attribute to update\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param i3 Static value used for concatenation only.\n * @param v4 Value checked for change.\n * @param i4 Static value used for concatenation only.\n * @param v5 Value checked for change.\n * @param i5 Static value used for concatenation only.\n * @param v6 Value checked for change.\n * @param i6 Static value used for concatenation only.\n * @param v7 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param sanitizer An optional sanitizer function\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵattributeInterpolate8(attrName, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, i6, v7, suffix, sanitizer, namespace) {\n    const lView = getLView();\n    const interpolatedValue = interpolation8(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, i6, v7, suffix);\n    if (interpolatedValue !== NO_CHANGE) {\n        const tNode = getSelectedTNode();\n        elementAttributeInternal(tNode, lView, attrName, interpolatedValue, sanitizer, namespace);\n        ngDevMode &&\n            storePropertyBindingMetadata(getTView().data, tNode, 'attr.' + attrName, getBindingIndex() - 8, prefix, i0, i1, i2, i3, i4, i5, i6, suffix);\n    }\n    return ɵɵattributeInterpolate8;\n}\n/**\n * Update an interpolated attribute on an element with 9 or more bound values surrounded by text.\n *\n * Used when the number of interpolated values exceeds 8.\n *\n * ```html\n * <div\n *  title=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}-{{v5}}-{{v6}}-{{v7}}-{{v8}}-{{v9}}suffix\"></div>\n * ```\n *\n * Its compiled representation is::\n *\n * ```ts\n * ɵɵattributeInterpolateV(\n *  'title', ['prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, '-', v5, '-', v6, '-', v7, '-', v9,\n *  'suffix']);\n * ```\n *\n * @param attrName The name of the attribute to update.\n * @param values The collection of values and the strings in-between those values, beginning with\n * a string prefix and ending with a string suffix.\n * (e.g. `['prefix', value0, '-', value1, '-', value2, ..., value99, 'suffix']`)\n * @param sanitizer An optional sanitizer function\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵattributeInterpolateV(attrName, values, sanitizer, namespace) {\n    const lView = getLView();\n    const interpolated = interpolationV(lView, values);\n    if (interpolated !== NO_CHANGE) {\n        const tNode = getSelectedTNode();\n        elementAttributeInternal(tNode, lView, attrName, interpolated, sanitizer, namespace);\n        if (ngDevMode) {\n            const interpolationInBetween = [values[0]]; // prefix\n            for (let i = 2; i < values.length; i += 2) {\n                interpolationInBetween.push(values[i]);\n            }\n            storePropertyBindingMetadata(getTView().data, tNode, 'attr.' + attrName, getBindingIndex() - interpolationInBetween.length + 1, ...interpolationInBetween);\n        }\n    }\n    return ɵɵattributeInterpolateV;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction templateFirstCreatePass(index, tView, lView, templateFn, decls, vars, tagName, attrsIndex, localRefsIndex) {\n    ngDevMode && assertFirstCreatePass(tView);\n    ngDevMode && ngDevMode.firstCreatePass++;\n    const tViewConsts = tView.consts;\n    // TODO(pk): refactor getOrCreateTNode to have the \"create\" only version\n    const tNode = getOrCreateTNode(tView, lView[T_HOST], index, 0 /* Container */, tagName || null, getConstant(tViewConsts, attrsIndex));\n    resolveDirectives(tView, lView, tNode, getConstant(tViewConsts, localRefsIndex));\n    registerPostOrderHooks(tView, tNode);\n    const embeddedTView = tNode.tViews = createTView(2 /* Embedded */, -1, templateFn, decls, vars, tView.directiveRegistry, tView.pipeRegistry, null, tView.schemas, tViewConsts);\n    const embeddedTViewNode = createTNode(tView, null, 2 /* View */, -1, null, null);\n    embeddedTViewNode.injectorIndex = tNode.injectorIndex;\n    embeddedTView.node = embeddedTViewNode;\n    if (tView.queries !== null) {\n        tView.queries.template(tView, tNode);\n        embeddedTView.queries = tView.queries.embeddedTView(tNode);\n    }\n    return tNode;\n}\n/**\n * Creates an LContainer for an ng-template (dynamically-inserted view), e.g.\n *\n * <ng-template #foo>\n *    <div></div>\n * </ng-template>\n *\n * @param index The index of the container in the data array\n * @param templateFn Inline template\n * @param decls The number of nodes, local refs, and pipes for this template\n * @param vars The number of bindings for this template\n * @param tagName The name of the container element, if applicable\n * @param attrsIndex Index of template attributes in the `consts` array.\n * @param localRefs Index of the local references in the `consts` array.\n * @param localRefExtractor A function which extracts local-refs values from the template.\n *        Defaults to the current element associated with the local-ref.\n *\n * @codeGenApi\n */\nfunction ɵɵtemplate(index, templateFn, decls, vars, tagName, attrsIndex, localRefsIndex, localRefExtractor) {\n    const lView = getLView();\n    const tView = getTView();\n    const adjustedIndex = index + HEADER_OFFSET;\n    const tNode = tView.firstCreatePass ?\n        templateFirstCreatePass(index, tView, lView, templateFn, decls, vars, tagName, attrsIndex, localRefsIndex) :\n        tView.data[adjustedIndex];\n    setPreviousOrParentTNode(tNode, false);\n    const comment = lView[RENDERER].createComment(ngDevMode ? 'container' : '');\n    appendChild(tView, lView, comment, tNode);\n    attachPatchData(comment, lView);\n    addToViewTree(lView, lView[adjustedIndex] = createLContainer(comment, lView, comment, tNode));\n    if (isDirectiveHost(tNode)) {\n        createDirectivesInstances(tView, lView, tNode);\n    }\n    if (localRefsIndex != null) {\n        saveResolvedLocalsInData(lView, tNode, localRefExtractor);\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** Store a value in the `data` at a given `index`. */\nfunction store(tView, lView, index, value) {\n    // We don't store any static data for local variables, so the first time\n    // we see the template, we should store as null to avoid a sparse array\n    const adjustedIndex = index + HEADER_OFFSET;\n    if (adjustedIndex >= tView.data.length) {\n        tView.data[adjustedIndex] = null;\n        tView.blueprint[adjustedIndex] = null;\n    }\n    lView[adjustedIndex] = value;\n}\n/**\n * Retrieves a local reference from the current contextViewData.\n *\n * If the reference to retrieve is in a parent view, this instruction is used in conjunction\n * with a nextContext() call, which walks up the tree and updates the contextViewData instance.\n *\n * @param index The index of the local ref in contextViewData.\n *\n * @codeGenApi\n */\nfunction ɵɵreference(index) {\n    const contextLView = getContextLView();\n    return load(contextLView, index);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction ɵɵdirectiveInject(token, flags = InjectFlags.Default) {\n    const lView = getLView();\n    // Fall back to inject() if view hasn't been created. This situation can happen in tests\n    // if inject utilities are used before bootstrapping.\n    if (lView == null)\n        return ɵɵinject(token, flags);\n    const tNode = getPreviousOrParentTNode();\n    return getOrCreateInjectable(tNode, lView, resolveForwardRef(token), flags);\n}\n/**\n * Facade for the attribute injection from DI.\n *\n * @codeGenApi\n */\nfunction ɵɵinjectAttribute(attrNameToInject) {\n    return injectAttributeImpl(getPreviousOrParentTNode(), attrNameToInject);\n}\n/**\n * Throws an error indicating that a factory function could not be generated by the compiler for a\n * particular class.\n *\n * This instruction allows the actual error message to be optimized away when ngDevMode is turned\n * off, saving bytes of generated code while still providing a good experience in dev mode.\n *\n * The name of the class is not mentioned here, but will be in the generated factory function name\n * and thus in the stack trace.\n *\n * @codeGenApi\n */\nfunction ɵɵinvalidFactory() {\n    const msg = ngDevMode ? `This constructor was not compatible with Dependency Injection.` : 'invalid';\n    throw new Error(msg);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Update a property on a selected element.\n *\n * Operates on the element selected by index via the {@link select} instruction.\n *\n * If the property name also exists as an input property on one of the element's directives,\n * the component property will be set instead of the element property. This check must\n * be conducted at runtime so child components that add new `@Inputs` don't have to be re-compiled\n *\n * @param propName Name of property. Because it is going to DOM, this is not subject to\n *        renaming as part of minification.\n * @param value New value to write.\n * @param sanitizer An optional function used to sanitize the value.\n * @returns This function returns itself so that it may be chained\n * (e.g. `property('name', ctx.name)('title', ctx.title)`)\n *\n * @codeGenApi\n */\nfunction ɵɵproperty(propName, value, sanitizer) {\n    const lView = getLView();\n    const bindingIndex = nextBindingIndex();\n    if (bindingUpdated(lView, bindingIndex, value)) {\n        const tView = getTView();\n        const tNode = getSelectedTNode();\n        elementPropertyInternal(tView, tNode, lView, propName, value, lView[RENDERER], sanitizer, false);\n        ngDevMode && storePropertyBindingMetadata(tView.data, tNode, propName, bindingIndex);\n    }\n    return ɵɵproperty;\n}\n/**\n * Given `<div style=\"...\" my-dir>` and `MyDir` with `@Input('style')` we need to write to\n * directive input.\n */\nfunction setDirectiveInputsWhichShadowsStyling(tView, tNode, lView, value, isClassBased) {\n    const inputs = tNode.inputs;\n    const property = isClassBased ? 'class' : 'style';\n    // We support both 'class' and `className` hence the fallback.\n    setInputsForProperty(tView, lView, inputs[property], property, value);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction elementStartFirstCreatePass(index, tView, lView, native, name, attrsIndex, localRefsIndex) {\n    ngDevMode && assertFirstCreatePass(tView);\n    ngDevMode && ngDevMode.firstCreatePass++;\n    const tViewConsts = tView.consts;\n    const attrs = getConstant(tViewConsts, attrsIndex);\n    const tNode = getOrCreateTNode(tView, lView[T_HOST], index, 3 /* Element */, name, attrs);\n    const hasDirectives = resolveDirectives(tView, lView, tNode, getConstant(tViewConsts, localRefsIndex));\n    ngDevMode && logUnknownElementError(tView, native, tNode, hasDirectives);\n    if (tNode.attrs !== null) {\n        computeStaticStyling(tNode, tNode.attrs, false);\n    }\n    if (tNode.mergedAttrs !== null) {\n        computeStaticStyling(tNode, tNode.mergedAttrs, true);\n    }\n    if (tView.queries !== null) {\n        tView.queries.elementStart(tView, tNode);\n    }\n    return tNode;\n}\n/**\n * Create DOM element. The instruction must later be followed by `elementEnd()` call.\n *\n * @param index Index of the element in the LView array\n * @param name Name of the DOM Node\n * @param attrsIndex Index of the element's attributes in the `consts` array.\n * @param localRefsIndex Index of the element's local references in the `consts` array.\n *\n * Attributes and localRefs are passed as an array of strings where elements with an even index\n * hold an attribute name and elements with an odd index hold an attribute value, ex.:\n * ['id', 'warning5', 'class', 'alert']\n *\n * @codeGenApi\n */\nfunction ɵɵelementStart(index, name, attrsIndex, localRefsIndex) {\n    const lView = getLView();\n    const tView = getTView();\n    const adjustedIndex = HEADER_OFFSET + index;\n    ngDevMode &&\n        assertEqual(getBindingIndex(), tView.bindingStartIndex, 'elements should be created before any bindings');\n    ngDevMode && ngDevMode.rendererCreateElement++;\n    ngDevMode && assertIndexInRange(lView, adjustedIndex);\n    const renderer = lView[RENDERER];\n    const native = lView[adjustedIndex] = elementCreate(name, renderer, getNamespace());\n    const tNode = tView.firstCreatePass ?\n        elementStartFirstCreatePass(index, tView, lView, native, name, attrsIndex, localRefsIndex) :\n        tView.data[adjustedIndex];\n    setPreviousOrParentTNode(tNode, true);\n    const mergedAttrs = tNode.mergedAttrs;\n    if (mergedAttrs !== null) {\n        setUpAttributes(renderer, native, mergedAttrs);\n    }\n    const classes = tNode.classes;\n    if (classes !== null) {\n        writeDirectClass(renderer, native, classes);\n    }\n    const styles = tNode.styles;\n    if (styles !== null) {\n        writeDirectStyle(renderer, native, styles);\n    }\n    appendChild(tView, lView, native, tNode);\n    // any immediate children of a component or template container must be pre-emptively\n    // monkey-patched with the component view data so that the element can be inspected\n    // later on using any element discovery utility methods (see `element_discovery.ts`)\n    if (getElementDepthCount() === 0) {\n        attachPatchData(native, lView);\n    }\n    increaseElementDepthCount();\n    if (isDirectiveHost(tNode)) {\n        createDirectivesInstances(tView, lView, tNode);\n        executeContentQueries(tView, tNode, lView);\n    }\n    if (localRefsIndex !== null) {\n        saveResolvedLocalsInData(lView, tNode);\n    }\n}\n/**\n * Mark the end of the element.\n *\n * @codeGenApi\n */\nfunction ɵɵelementEnd() {\n    let previousOrParentTNode = getPreviousOrParentTNode();\n    ngDevMode && assertDefined(previousOrParentTNode, 'No parent node to close.');\n    if (getIsParent()) {\n        setIsNotParent();\n    }\n    else {\n        ngDevMode && assertHasParent(getPreviousOrParentTNode());\n        previousOrParentTNode = previousOrParentTNode.parent;\n        setPreviousOrParentTNode(previousOrParentTNode, false);\n    }\n    const tNode = previousOrParentTNode;\n    ngDevMode && assertNodeType(tNode, 3 /* Element */);\n    decreaseElementDepthCount();\n    const tView = getTView();\n    if (tView.firstCreatePass) {\n        registerPostOrderHooks(tView, previousOrParentTNode);\n        if (isContentQueryHost(previousOrParentTNode)) {\n            tView.queries.elementEnd(previousOrParentTNode);\n        }\n    }\n    if (tNode.classesWithoutHost != null && hasClassInput(tNode)) {\n        setDirectiveInputsWhichShadowsStyling(tView, tNode, getLView(), tNode.classesWithoutHost, true);\n    }\n    if (tNode.stylesWithoutHost != null && hasStyleInput(tNode)) {\n        setDirectiveInputsWhichShadowsStyling(tView, tNode, getLView(), tNode.stylesWithoutHost, false);\n    }\n}\n/**\n * Creates an empty element using {@link elementStart} and {@link elementEnd}\n *\n * @param index Index of the element in the data array\n * @param name Name of the DOM Node\n * @param attrsIndex Index of the element's attributes in the `consts` array.\n * @param localRefsIndex Index of the element's local references in the `consts` array.\n *\n * @codeGenApi\n */\nfunction ɵɵelement(index, name, attrsIndex, localRefsIndex) {\n    ɵɵelementStart(index, name, attrsIndex, localRefsIndex);\n    ɵɵelementEnd();\n}\nfunction logUnknownElementError(tView, element, tNode, hasDirectives) {\n    const schemas = tView.schemas;\n    // If `schemas` is set to `null`, that's an indication that this Component was compiled in AOT\n    // mode where this check happens at compile time. In JIT mode, `schemas` is always present and\n    // defined as an array (as an empty array in case `schemas` field is not defined) and we should\n    // execute the check below.\n    if (schemas === null)\n        return;\n    const tagName = tNode.tagName;\n    // If the element matches any directive, it's considered as valid.\n    if (!hasDirectives && tagName !== null) {\n        // The element is unknown if it's an instance of HTMLUnknownElement or it isn't registered\n        // as a custom element. Note that unknown elements with a dash in their name won't be instances\n        // of HTMLUnknownElement in browsers that support web components.\n        const isUnknown = \n        // Note that we can't check for `typeof HTMLUnknownElement === 'function'`,\n        // because while most browsers return 'function', IE returns 'object'.\n        (typeof HTMLUnknownElement !== 'undefined' && HTMLUnknownElement &&\n            element instanceof HTMLUnknownElement) ||\n            (typeof customElements !== 'undefined' && tagName.indexOf('-') > -1 &&\n                !customElements.get(tagName));\n        if (isUnknown && !matchingSchemas(tView, tagName)) {\n            let message = `'${tagName}' is not a known element:\\n`;\n            message += `1. If '${tagName}' is an Angular component, then verify that it is part of this module.\\n`;\n            if (tagName && tagName.indexOf('-') > -1) {\n                message += `2. If '${tagName}' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message.`;\n            }\n            else {\n                message +=\n                    `2. To allow any element add 'NO_ERRORS_SCHEMA' to the '@NgModule.schemas' of this component.`;\n            }\n            console.error(message);\n        }\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction elementContainerStartFirstCreatePass(index, tView, lView, attrsIndex, localRefsIndex) {\n    ngDevMode && ngDevMode.firstCreatePass++;\n    const tViewConsts = tView.consts;\n    const attrs = getConstant(tViewConsts, attrsIndex);\n    const tNode = getOrCreateTNode(tView, lView[T_HOST], index, 4 /* ElementContainer */, 'ng-container', attrs);\n    // While ng-container doesn't necessarily support styling, we use the style context to identify\n    // and execute directives on the ng-container.\n    if (attrs !== null) {\n        computeStaticStyling(tNode, attrs, true);\n    }\n    const localRefs = getConstant(tViewConsts, localRefsIndex);\n    resolveDirectives(tView, lView, tNode, localRefs);\n    if (tView.queries !== null) {\n        tView.queries.elementStart(tView, tNode);\n    }\n    return tNode;\n}\n/**\n * Creates a logical container for other nodes (<ng-container>) backed by a comment node in the DOM.\n * The instruction must later be followed by `elementContainerEnd()` call.\n *\n * @param index Index of the element in the LView array\n * @param attrsIndex Index of the container attributes in the `consts` array.\n * @param localRefsIndex Index of the container's local references in the `consts` array.\n *\n * Even if this instruction accepts a set of attributes no actual attribute values are propagated to\n * the DOM (as a comment node can't have attributes). Attributes are here only for directive\n * matching purposes and setting initial inputs of directives.\n *\n * @codeGenApi\n */\nfunction ɵɵelementContainerStart(index, attrsIndex, localRefsIndex) {\n    const lView = getLView();\n    const tView = getTView();\n    const adjustedIndex = index + HEADER_OFFSET;\n    ngDevMode && assertIndexInRange(lView, adjustedIndex);\n    ngDevMode &&\n        assertEqual(getBindingIndex(), tView.bindingStartIndex, 'element containers should be created before any bindings');\n    const tNode = tView.firstCreatePass ?\n        elementContainerStartFirstCreatePass(index, tView, lView, attrsIndex, localRefsIndex) :\n        tView.data[adjustedIndex];\n    setPreviousOrParentTNode(tNode, true);\n    ngDevMode && ngDevMode.rendererCreateComment++;\n    const native = lView[adjustedIndex] =\n        lView[RENDERER].createComment(ngDevMode ? 'ng-container' : '');\n    appendChild(tView, lView, native, tNode);\n    attachPatchData(native, lView);\n    if (isDirectiveHost(tNode)) {\n        createDirectivesInstances(tView, lView, tNode);\n        executeContentQueries(tView, tNode, lView);\n    }\n    if (localRefsIndex != null) {\n        saveResolvedLocalsInData(lView, tNode);\n    }\n}\n/**\n * Mark the end of the <ng-container>.\n *\n * @codeGenApi\n */\nfunction ɵɵelementContainerEnd() {\n    let previousOrParentTNode = getPreviousOrParentTNode();\n    const tView = getTView();\n    if (getIsParent()) {\n        setIsNotParent();\n    }\n    else {\n        ngDevMode && assertHasParent(previousOrParentTNode);\n        previousOrParentTNode = previousOrParentTNode.parent;\n        setPreviousOrParentTNode(previousOrParentTNode, false);\n    }\n    ngDevMode && assertNodeType(previousOrParentTNode, 4 /* ElementContainer */);\n    if (tView.firstCreatePass) {\n        registerPostOrderHooks(tView, previousOrParentTNode);\n        if (isContentQueryHost(previousOrParentTNode)) {\n            tView.queries.elementEnd(previousOrParentTNode);\n        }\n    }\n}\n/**\n * Creates an empty logical container using {@link elementContainerStart}\n * and {@link elementContainerEnd}\n *\n * @param index Index of the element in the LView array\n * @param attrsIndex Index of the container attributes in the `consts` array.\n * @param localRefsIndex Index of the container's local references in the `consts` array.\n *\n * @codeGenApi\n */\nfunction ɵɵelementContainer(index, attrsIndex, localRefsIndex) {\n    ɵɵelementContainerStart(index, attrsIndex, localRefsIndex);\n    ɵɵelementContainerEnd();\n}\n\n/**\n * Returns the current OpaqueViewState instance.\n *\n * Used in conjunction with the restoreView() instruction to save a snapshot\n * of the current view and restore it when listeners are invoked. This allows\n * walking the declaration view tree in listeners to get vars from parent views.\n *\n * @codeGenApi\n */\nfunction ɵɵgetCurrentView() {\n    return getLView();\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Determine if the argument is shaped like a Promise\n */\nfunction isPromise(obj) {\n    // allow any Promise/A+ compliant thenable.\n    // It's up to the caller to ensure that obj.then conforms to the spec\n    return !!obj && typeof obj.then === 'function';\n}\n/**\n * Determine if the argument is an Observable\n */\nfunction isObservable(obj) {\n    // TODO: use isObservable once we update pass rxjs 6.1\n    // https://github.com/ReactiveX/rxjs/blob/master/CHANGELOG.md#610-2018-05-03\n    return !!obj && typeof obj.subscribe === 'function';\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Adds an event listener to the current node.\n *\n * If an output exists on one of the node's directives, it also subscribes to the output\n * and saves the subscription for later cleanup.\n *\n * @param eventName Name of the event\n * @param listenerFn The function to be called when event emits\n * @param useCapture Whether or not to use capture in event listener\n * @param eventTargetResolver Function that returns global target information in case this listener\n * should be attached to a global object like window, document or body\n *\n * @codeGenApi\n */\nfunction ɵɵlistener(eventName, listenerFn, useCapture = false, eventTargetResolver) {\n    const lView = getLView();\n    const tView = getTView();\n    const tNode = getPreviousOrParentTNode();\n    listenerInternal(tView, lView, lView[RENDERER], tNode, eventName, listenerFn, useCapture, eventTargetResolver);\n    return ɵɵlistener;\n}\n/**\n * Registers a synthetic host listener (e.g. `(@foo.start)`) on a component or directive.\n *\n * This instruction is for compatibility purposes and is designed to ensure that a\n * synthetic host listener (e.g. `@HostListener('@foo.start')`) properly gets rendered\n * in the component's renderer. Normally all host listeners are evaluated with the\n * parent component's renderer, but, in the case of animation @triggers, they need\n * to be evaluated with the sub component's renderer (because that's where the\n * animation triggers are defined).\n *\n * Do not use this instruction as a replacement for `listener`. This instruction\n * only exists to ensure compatibility with the ViewEngine's host binding behavior.\n *\n * @param eventName Name of the event\n * @param listenerFn The function to be called when event emits\n * @param useCapture Whether or not to use capture in event listener\n * @param eventTargetResolver Function that returns global target information in case this listener\n * should be attached to a global object like window, document or body\n *\n * @codeGenApi\n */\nfunction ɵɵsyntheticHostListener(eventName, listenerFn, useCapture = false, eventTargetResolver) {\n    const tNode = getPreviousOrParentTNode();\n    const lView = getLView();\n    const tView = getTView();\n    const currentDef = getCurrentDirectiveDef(tView.data);\n    const renderer = loadComponentRenderer(currentDef, tNode, lView);\n    listenerInternal(tView, lView, renderer, tNode, eventName, listenerFn, useCapture, eventTargetResolver);\n    return ɵɵsyntheticHostListener;\n}\n/**\n * A utility function that checks if a given element has already an event handler registered for an\n * event with a specified name. The TView.cleanup data structure is used to find out which events\n * are registered for a given element.\n */\nfunction findExistingListener(tView, lView, eventName, tNodeIdx) {\n    const tCleanup = tView.cleanup;\n    if (tCleanup != null) {\n        for (let i = 0; i < tCleanup.length - 1; i += 2) {\n            const cleanupEventName = tCleanup[i];\n            if (cleanupEventName === eventName && tCleanup[i + 1] === tNodeIdx) {\n                // We have found a matching event name on the same node but it might not have been\n                // registered yet, so we must explicitly verify entries in the LView cleanup data\n                // structures.\n                const lCleanup = lView[CLEANUP];\n                const listenerIdxInLCleanup = tCleanup[i + 2];\n                return lCleanup.length > listenerIdxInLCleanup ? lCleanup[listenerIdxInLCleanup] : null;\n            }\n            // TView.cleanup can have a mix of 4-elements entries (for event handler cleanups) or\n            // 2-element entries (for directive and queries destroy hooks). As such we can encounter\n            // blocks of 4 or 2 items in the tView.cleanup and this is why we iterate over 2 elements\n            // first and jump another 2 elements if we detect listeners cleanup (4 elements). Also check\n            // documentation of TView.cleanup for more details of this data structure layout.\n            if (typeof cleanupEventName === 'string') {\n                i += 2;\n            }\n        }\n    }\n    return null;\n}\nfunction listenerInternal(tView, lView, renderer, tNode, eventName, listenerFn, useCapture = false, eventTargetResolver) {\n    const isTNodeDirectiveHost = isDirectiveHost(tNode);\n    const firstCreatePass = tView.firstCreatePass;\n    const tCleanup = firstCreatePass && (tView.cleanup || (tView.cleanup = []));\n    // When the ɵɵlistener instruction was generated and is executed we know that there is either a\n    // native listener or a directive output on this element. As such we we know that we will have to\n    // register a listener and store its cleanup function on LView.\n    const lCleanup = getLCleanup(lView);\n    ngDevMode &&\n        assertNodeOfPossibleTypes(tNode, [3 /* Element */, 0 /* Container */, 4 /* ElementContainer */]);\n    let processOutputs = true;\n    // add native event listener - applicable to elements only\n    if (tNode.type === 3 /* Element */) {\n        const native = getNativeByTNode(tNode, lView);\n        const resolved = eventTargetResolver ? eventTargetResolver(native) : EMPTY_OBJ;\n        const target = resolved.target || native;\n        const lCleanupIndex = lCleanup.length;\n        const idxOrTargetGetter = eventTargetResolver ?\n            (_lView) => eventTargetResolver(unwrapRNode(_lView[tNode.index])).target :\n            tNode.index;\n        // In order to match current behavior, native DOM event listeners must be added for all\n        // events (including outputs).\n        if (isProceduralRenderer(renderer)) {\n            // There might be cases where multiple directives on the same element try to register an event\n            // handler function for the same event. In this situation we want to avoid registration of\n            // several native listeners as each registration would be intercepted by NgZone and\n            // trigger change detection. This would mean that a single user action would result in several\n            // change detections being invoked. To avoid this situation we want to have only one call to\n            // native handler registration (for the same element and same type of event).\n            //\n            // In order to have just one native event handler in presence of multiple handler functions,\n            // we just register a first handler function as a native event listener and then chain\n            // (coalesce) other handler functions on top of the first native handler function.\n            let existingListener = null;\n            // Please note that the coalescing described here doesn't happen for events specifying an\n            // alternative target (ex. (document:click)) - this is to keep backward compatibility with the\n            // view engine.\n            // Also, we don't have to search for existing listeners is there are no directives\n            // matching on a given node as we can't register multiple event handlers for the same event in\n            // a template (this would mean having duplicate attributes).\n            if (!eventTargetResolver && isTNodeDirectiveHost) {\n                existingListener = findExistingListener(tView, lView, eventName, tNode.index);\n            }\n            if (existingListener !== null) {\n                // Attach a new listener to coalesced listeners list, maintaining the order in which\n                // listeners are registered. For performance reasons, we keep a reference to the last\n                // listener in that list (in `__ngLastListenerFn__` field), so we can avoid going through\n                // the entire set each time we need to add a new listener.\n                const lastListenerFn = existingListener.__ngLastListenerFn__ || existingListener;\n                lastListenerFn.__ngNextListenerFn__ = listenerFn;\n                existingListener.__ngLastListenerFn__ = listenerFn;\n                processOutputs = false;\n            }\n            else {\n                // The first argument of `listen` function in Procedural Renderer is:\n                // - either a target name (as a string) in case of global target (window, document, body)\n                // - or element reference (in all other cases)\n                listenerFn = wrapListener(tNode, lView, listenerFn, false /** preventDefault */);\n                const cleanupFn = renderer.listen(resolved.name || target, eventName, listenerFn);\n                ngDevMode && ngDevMode.rendererAddEventListener++;\n                lCleanup.push(listenerFn, cleanupFn);\n                tCleanup && tCleanup.push(eventName, idxOrTargetGetter, lCleanupIndex, lCleanupIndex + 1);\n            }\n        }\n        else {\n            listenerFn = wrapListener(tNode, lView, listenerFn, true /** preventDefault */);\n            target.addEventListener(eventName, listenerFn, useCapture);\n            ngDevMode && ngDevMode.rendererAddEventListener++;\n            lCleanup.push(listenerFn);\n            tCleanup && tCleanup.push(eventName, idxOrTargetGetter, lCleanupIndex, useCapture);\n        }\n    }\n    // subscribe to directive outputs\n    const outputs = tNode.outputs;\n    let props;\n    if (processOutputs && outputs !== null && (props = outputs[eventName])) {\n        const propsLength = props.length;\n        if (propsLength) {\n            for (let i = 0; i < propsLength; i += 2) {\n                const index = props[i];\n                ngDevMode && assertIndexInRange(lView, index);\n                const minifiedName = props[i + 1];\n                const directiveInstance = lView[index];\n                const output = directiveInstance[minifiedName];\n                if (ngDevMode && !isObservable(output)) {\n                    throw new Error(`@Output ${minifiedName} not initialized in '${directiveInstance.constructor.name}'.`);\n                }\n                const subscription = output.subscribe(listenerFn);\n                const idx = lCleanup.length;\n                lCleanup.push(listenerFn, subscription);\n                tCleanup && tCleanup.push(eventName, tNode.index, idx, -(idx + 1));\n            }\n        }\n    }\n}\nfunction executeListenerWithErrorHandling(lView, listenerFn, e) {\n    try {\n        // Only explicitly returning false from a listener should preventDefault\n        return listenerFn(e) !== false;\n    }\n    catch (error) {\n        handleError(lView, error);\n        return false;\n    }\n}\n/**\n * Wraps an event listener with a function that marks ancestors dirty and prevents default behavior,\n * if applicable.\n *\n * @param tNode The TNode associated with this listener\n * @param lView The LView that contains this listener\n * @param listenerFn The listener function to call\n * @param wrapWithPreventDefault Whether or not to prevent default behavior\n * (the procedural renderer does this already, so in those cases, we should skip)\n */\nfunction wrapListener(tNode, lView, listenerFn, wrapWithPreventDefault) {\n    // Note: we are performing most of the work in the listener function itself\n    // to optimize listener registration.\n    return function wrapListenerIn_markDirtyAndPreventDefault(e) {\n        // Ivy uses `Function` as a special token that allows us to unwrap the function\n        // so that it can be invoked programmatically by `DebugNode.triggerEventHandler`.\n        if (e === Function) {\n            return listenerFn;\n        }\n        // In order to be backwards compatible with View Engine, events on component host nodes\n        // must also mark the component view itself dirty (i.e. the view that it owns).\n        const startView = tNode.flags & 2 /* isComponentHost */ ?\n            getComponentLViewByIndex(tNode.index, lView) :\n            lView;\n        // See interfaces/view.ts for more on LViewFlags.ManualOnPush\n        if ((lView[FLAGS] & 32 /* ManualOnPush */) === 0) {\n            markViewDirty(startView);\n        }\n        let result = executeListenerWithErrorHandling(lView, listenerFn, e);\n        // A just-invoked listener function might have coalesced listeners so we need to check for\n        // their presence and invoke as needed.\n        let nextListenerFn = wrapListenerIn_markDirtyAndPreventDefault.__ngNextListenerFn__;\n        while (nextListenerFn) {\n            // We should prevent default if any of the listeners explicitly return false\n            result = executeListenerWithErrorHandling(lView, nextListenerFn, e) && result;\n            nextListenerFn = nextListenerFn.__ngNextListenerFn__;\n        }\n        if (wrapWithPreventDefault && result === false) {\n            e.preventDefault();\n            // Necessary for legacy browsers that don't support preventDefault (e.g. IE)\n            e.returnValue = false;\n        }\n        return result;\n    };\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Retrieves a context at the level specified and saves it as the global, contextViewData.\n * Will get the next level up if level is not specified.\n *\n * This is used to save contexts of parent views so they can be bound in embedded views, or\n * in conjunction with reference() to bind a ref from a parent view.\n *\n * @param level The relative level of the view from which to grab context compared to contextVewData\n * @returns context\n *\n * @codeGenApi\n */\nfunction ɵɵnextContext(level = 1) {\n    return nextContextImpl(level);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Checks a given node against matching projection slots and returns the\n * determined slot index. Returns \"null\" if no slot matched the given node.\n *\n * This function takes into account the parsed ngProjectAs selector from the\n * node's attributes. If present, it will check whether the ngProjectAs selector\n * matches any of the projection slot selectors.\n */\nfunction matchingProjectionSlotIndex(tNode, projectionSlots) {\n    let wildcardNgContentIndex = null;\n    const ngProjectAsAttrVal = getProjectAsAttrValue(tNode);\n    for (let i = 0; i < projectionSlots.length; i++) {\n        const slotValue = projectionSlots[i];\n        // The last wildcard projection slot should match all nodes which aren't matching\n        // any selector. This is necessary to be backwards compatible with view engine.\n        if (slotValue === '*') {\n            wildcardNgContentIndex = i;\n            continue;\n        }\n        // If we ran into an `ngProjectAs` attribute, we should match its parsed selector\n        // to the list of selectors, otherwise we fall back to matching against the node.\n        if (ngProjectAsAttrVal === null ?\n            isNodeMatchingSelectorList(tNode, slotValue, /* isProjectionMode */ true) :\n            isSelectorInSelectorList(ngProjectAsAttrVal, slotValue)) {\n            return i; // first matching selector \"captures\" a given node\n        }\n    }\n    return wildcardNgContentIndex;\n}\n/**\n * Instruction to distribute projectable nodes among <ng-content> occurrences in a given template.\n * It takes all the selectors from the entire component's template and decides where\n * each projected node belongs (it re-distributes nodes among \"buckets\" where each \"bucket\" is\n * backed by a selector).\n *\n * This function requires CSS selectors to be provided in 2 forms: parsed (by a compiler) and text,\n * un-parsed form.\n *\n * The parsed form is needed for efficient matching of a node against a given CSS selector.\n * The un-parsed, textual form is needed for support of the ngProjectAs attribute.\n *\n * Having a CSS selector in 2 different formats is not ideal, but alternatives have even more\n * drawbacks:\n * - having only a textual form would require runtime parsing of CSS selectors;\n * - we can't have only a parsed as we can't re-construct textual form from it (as entered by a\n * template author).\n *\n * @param projectionSlots? A collection of projection slots. A projection slot can be based\n *        on a parsed CSS selectors or set to the wildcard selector (\"*\") in order to match\n *        all nodes which do not match any selector. If not specified, a single wildcard\n *        selector projection slot will be defined.\n *\n * @codeGenApi\n */\nfunction ɵɵprojectionDef(projectionSlots) {\n    const componentNode = getLView()[DECLARATION_COMPONENT_VIEW][T_HOST];\n    if (!componentNode.projection) {\n        // If no explicit projection slots are defined, fall back to a single\n        // projection slot with the wildcard selector.\n        const numProjectionSlots = projectionSlots ? projectionSlots.length : 1;\n        const projectionHeads = componentNode.projection =\n            newArray(numProjectionSlots, null);\n        const tails = projectionHeads.slice();\n        let componentChild = componentNode.child;\n        while (componentChild !== null) {\n            const slotIndex = projectionSlots ? matchingProjectionSlotIndex(componentChild, projectionSlots) : 0;\n            if (slotIndex !== null) {\n                if (tails[slotIndex]) {\n                    tails[slotIndex].projectionNext = componentChild;\n                }\n                else {\n                    projectionHeads[slotIndex] = componentChild;\n                }\n                tails[slotIndex] = componentChild;\n            }\n            componentChild = componentChild.next;\n        }\n    }\n}\nlet delayProjection = false;\nfunction setDelayProjection(value) {\n    delayProjection = value;\n}\n/**\n * Inserts previously re-distributed projected nodes. This instruction must be preceded by a call\n * to the projectionDef instruction.\n *\n * @param nodeIndex\n * @param selectorIndex:\n *        - 0 when the selector is `*` (or unspecified as this is the default value),\n *        - 1 based index of the selector from the {@link projectionDef}\n *\n * @codeGenApi\n */\nfunction ɵɵprojection(nodeIndex, selectorIndex = 0, attrs) {\n    const lView = getLView();\n    const tView = getTView();\n    const tProjectionNode = getOrCreateTNode(tView, lView[T_HOST], nodeIndex, 1 /* Projection */, null, attrs || null);\n    // We can't use viewData[HOST_NODE] because projection nodes can be nested in embedded views.\n    if (tProjectionNode.projection === null)\n        tProjectionNode.projection = selectorIndex;\n    // `<ng-content>` has no content\n    setIsNotParent();\n    // We might need to delay the projection of nodes if they are in the middle of an i18n block\n    if (!delayProjection) {\n        // re-distribution of projectable nodes is stored on a component's view level\n        applyProjection(tView, lView, tProjectionNode);\n    }\n}\n\n/**\n *\n * Update an interpolated property on an element with a lone bound value\n *\n * Used when the value passed to a property has 1 interpolated value in it, an no additional text\n * surrounds that interpolated value:\n *\n * ```html\n * <div title=\"{{v0}}\"></div>\n * ```\n *\n * Its compiled representation is::\n *\n * ```ts\n * ɵɵpropertyInterpolate('title', v0);\n * ```\n *\n * If the property name also exists as an input property on one of the element's directives,\n * the component property will be set instead of the element property. This check must\n * be conducted at runtime so child components that add new `@Inputs` don't have to be re-compiled.\n *\n * @param propName The name of the property to update\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param sanitizer An optional sanitizer function\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵpropertyInterpolate(propName, v0, sanitizer) {\n    ɵɵpropertyInterpolate1(propName, '', v0, '', sanitizer);\n    return ɵɵpropertyInterpolate;\n}\n/**\n *\n * Update an interpolated property on an element with single bound value surrounded by text.\n *\n * Used when the value passed to a property has 1 interpolated value in it:\n *\n * ```html\n * <div title=\"prefix{{v0}}suffix\"></div>\n * ```\n *\n * Its compiled representation is::\n *\n * ```ts\n * ɵɵpropertyInterpolate1('title', 'prefix', v0, 'suffix');\n * ```\n *\n * If the property name also exists as an input property on one of the element's directives,\n * the component property will be set instead of the element property. This check must\n * be conducted at runtime so child components that add new `@Inputs` don't have to be re-compiled.\n *\n * @param propName The name of the property to update\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param sanitizer An optional sanitizer function\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵpropertyInterpolate1(propName, prefix, v0, suffix, sanitizer) {\n    const lView = getLView();\n    const interpolatedValue = interpolation1(lView, prefix, v0, suffix);\n    if (interpolatedValue !== NO_CHANGE) {\n        const tView = getTView();\n        const tNode = getSelectedTNode();\n        elementPropertyInternal(tView, tNode, lView, propName, interpolatedValue, lView[RENDERER], sanitizer, false);\n        ngDevMode &&\n            storePropertyBindingMetadata(tView.data, tNode, propName, getBindingIndex() - 1, prefix, suffix);\n    }\n    return ɵɵpropertyInterpolate1;\n}\n/**\n *\n * Update an interpolated property on an element with 2 bound values surrounded by text.\n *\n * Used when the value passed to a property has 2 interpolated values in it:\n *\n * ```html\n * <div title=\"prefix{{v0}}-{{v1}}suffix\"></div>\n * ```\n *\n * Its compiled representation is::\n *\n * ```ts\n * ɵɵpropertyInterpolate2('title', 'prefix', v0, '-', v1, 'suffix');\n * ```\n *\n * If the property name also exists as an input property on one of the element's directives,\n * the component property will be set instead of the element property. This check must\n * be conducted at runtime so child components that add new `@Inputs` don't have to be re-compiled.\n *\n * @param propName The name of the property to update\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param sanitizer An optional sanitizer function\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵpropertyInterpolate2(propName, prefix, v0, i0, v1, suffix, sanitizer) {\n    const lView = getLView();\n    const interpolatedValue = interpolation2(lView, prefix, v0, i0, v1, suffix);\n    if (interpolatedValue !== NO_CHANGE) {\n        const tView = getTView();\n        const tNode = getSelectedTNode();\n        elementPropertyInternal(tView, tNode, lView, propName, interpolatedValue, lView[RENDERER], sanitizer, false);\n        ngDevMode &&\n            storePropertyBindingMetadata(tView.data, tNode, propName, getBindingIndex() - 2, prefix, i0, suffix);\n    }\n    return ɵɵpropertyInterpolate2;\n}\n/**\n *\n * Update an interpolated property on an element with 3 bound values surrounded by text.\n *\n * Used when the value passed to a property has 3 interpolated values in it:\n *\n * ```html\n * <div title=\"prefix{{v0}}-{{v1}}-{{v2}}suffix\"></div>\n * ```\n *\n * Its compiled representation is::\n *\n * ```ts\n * ɵɵpropertyInterpolate3(\n * 'title', 'prefix', v0, '-', v1, '-', v2, 'suffix');\n * ```\n *\n * If the property name also exists as an input property on one of the element's directives,\n * the component property will be set instead of the element property. This check must\n * be conducted at runtime so child components that add new `@Inputs` don't have to be re-compiled.\n *\n * @param propName The name of the property to update\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param sanitizer An optional sanitizer function\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵpropertyInterpolate3(propName, prefix, v0, i0, v1, i1, v2, suffix, sanitizer) {\n    const lView = getLView();\n    const interpolatedValue = interpolation3(lView, prefix, v0, i0, v1, i1, v2, suffix);\n    if (interpolatedValue !== NO_CHANGE) {\n        const tView = getTView();\n        const tNode = getSelectedTNode();\n        elementPropertyInternal(tView, tNode, lView, propName, interpolatedValue, lView[RENDERER], sanitizer, false);\n        ngDevMode &&\n            storePropertyBindingMetadata(tView.data, tNode, propName, getBindingIndex() - 3, prefix, i0, i1, suffix);\n    }\n    return ɵɵpropertyInterpolate3;\n}\n/**\n *\n * Update an interpolated property on an element with 4 bound values surrounded by text.\n *\n * Used when the value passed to a property has 4 interpolated values in it:\n *\n * ```html\n * <div title=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}suffix\"></div>\n * ```\n *\n * Its compiled representation is::\n *\n * ```ts\n * ɵɵpropertyInterpolate4(\n * 'title', 'prefix', v0, '-', v1, '-', v2, '-', v3, 'suffix');\n * ```\n *\n * If the property name also exists as an input property on one of the element's directives,\n * the component property will be set instead of the element property. This check must\n * be conducted at runtime so child components that add new `@Inputs` don't have to be re-compiled.\n *\n * @param propName The name of the property to update\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param sanitizer An optional sanitizer function\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵpropertyInterpolate4(propName, prefix, v0, i0, v1, i1, v2, i2, v3, suffix, sanitizer) {\n    const lView = getLView();\n    const interpolatedValue = interpolation4(lView, prefix, v0, i0, v1, i1, v2, i2, v3, suffix);\n    if (interpolatedValue !== NO_CHANGE) {\n        const tView = getTView();\n        const tNode = getSelectedTNode();\n        elementPropertyInternal(tView, tNode, lView, propName, interpolatedValue, lView[RENDERER], sanitizer, false);\n        ngDevMode &&\n            storePropertyBindingMetadata(tView.data, tNode, propName, getBindingIndex() - 4, prefix, i0, i1, i2, suffix);\n    }\n    return ɵɵpropertyInterpolate4;\n}\n/**\n *\n * Update an interpolated property on an element with 5 bound values surrounded by text.\n *\n * Used when the value passed to a property has 5 interpolated values in it:\n *\n * ```html\n * <div title=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}suffix\"></div>\n * ```\n *\n * Its compiled representation is::\n *\n * ```ts\n * ɵɵpropertyInterpolate5(\n * 'title', 'prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, 'suffix');\n * ```\n *\n * If the property name also exists as an input property on one of the element's directives,\n * the component property will be set instead of the element property. This check must\n * be conducted at runtime so child components that add new `@Inputs` don't have to be re-compiled.\n *\n * @param propName The name of the property to update\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param i3 Static value used for concatenation only.\n * @param v4 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param sanitizer An optional sanitizer function\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵpropertyInterpolate5(propName, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, suffix, sanitizer) {\n    const lView = getLView();\n    const interpolatedValue = interpolation5(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, suffix);\n    if (interpolatedValue !== NO_CHANGE) {\n        const tView = getTView();\n        const tNode = getSelectedTNode();\n        elementPropertyInternal(tView, tNode, lView, propName, interpolatedValue, lView[RENDERER], sanitizer, false);\n        ngDevMode &&\n            storePropertyBindingMetadata(tView.data, tNode, propName, getBindingIndex() - 5, prefix, i0, i1, i2, i3, suffix);\n    }\n    return ɵɵpropertyInterpolate5;\n}\n/**\n *\n * Update an interpolated property on an element with 6 bound values surrounded by text.\n *\n * Used when the value passed to a property has 6 interpolated values in it:\n *\n * ```html\n * <div title=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}-{{v5}}suffix\"></div>\n * ```\n *\n * Its compiled representation is::\n *\n * ```ts\n * ɵɵpropertyInterpolate6(\n *    'title', 'prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, '-', v5, 'suffix');\n * ```\n *\n * If the property name also exists as an input property on one of the element's directives,\n * the component property will be set instead of the element property. This check must\n * be conducted at runtime so child components that add new `@Inputs` don't have to be re-compiled.\n *\n * @param propName The name of the property to update\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param i3 Static value used for concatenation only.\n * @param v4 Value checked for change.\n * @param i4 Static value used for concatenation only.\n * @param v5 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param sanitizer An optional sanitizer function\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵpropertyInterpolate6(propName, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, suffix, sanitizer) {\n    const lView = getLView();\n    const interpolatedValue = interpolation6(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, suffix);\n    if (interpolatedValue !== NO_CHANGE) {\n        const tView = getTView();\n        const tNode = getSelectedTNode();\n        elementPropertyInternal(tView, tNode, lView, propName, interpolatedValue, lView[RENDERER], sanitizer, false);\n        ngDevMode &&\n            storePropertyBindingMetadata(tView.data, tNode, propName, getBindingIndex() - 6, prefix, i0, i1, i2, i3, i4, suffix);\n    }\n    return ɵɵpropertyInterpolate6;\n}\n/**\n *\n * Update an interpolated property on an element with 7 bound values surrounded by text.\n *\n * Used when the value passed to a property has 7 interpolated values in it:\n *\n * ```html\n * <div title=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}-{{v5}}-{{v6}}suffix\"></div>\n * ```\n *\n * Its compiled representation is::\n *\n * ```ts\n * ɵɵpropertyInterpolate7(\n *    'title', 'prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, '-', v5, '-', v6, 'suffix');\n * ```\n *\n * If the property name also exists as an input property on one of the element's directives,\n * the component property will be set instead of the element property. This check must\n * be conducted at runtime so child components that add new `@Inputs` don't have to be re-compiled.\n *\n * @param propName The name of the property to update\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param i3 Static value used for concatenation only.\n * @param v4 Value checked for change.\n * @param i4 Static value used for concatenation only.\n * @param v5 Value checked for change.\n * @param i5 Static value used for concatenation only.\n * @param v6 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param sanitizer An optional sanitizer function\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵpropertyInterpolate7(propName, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, suffix, sanitizer) {\n    const lView = getLView();\n    const interpolatedValue = interpolation7(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, suffix);\n    if (interpolatedValue !== NO_CHANGE) {\n        const tView = getTView();\n        const tNode = getSelectedTNode();\n        elementPropertyInternal(tView, tNode, lView, propName, interpolatedValue, lView[RENDERER], sanitizer, false);\n        ngDevMode &&\n            storePropertyBindingMetadata(tView.data, tNode, propName, getBindingIndex() - 7, prefix, i0, i1, i2, i3, i4, i5, suffix);\n    }\n    return ɵɵpropertyInterpolate7;\n}\n/**\n *\n * Update an interpolated property on an element with 8 bound values surrounded by text.\n *\n * Used when the value passed to a property has 8 interpolated values in it:\n *\n * ```html\n * <div title=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}-{{v5}}-{{v6}}-{{v7}}suffix\"></div>\n * ```\n *\n * Its compiled representation is::\n *\n * ```ts\n * ɵɵpropertyInterpolate8(\n *  'title', 'prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, '-', v5, '-', v6, '-', v7, 'suffix');\n * ```\n *\n * If the property name also exists as an input property on one of the element's directives,\n * the component property will be set instead of the element property. This check must\n * be conducted at runtime so child components that add new `@Inputs` don't have to be re-compiled.\n *\n * @param propName The name of the property to update\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param i3 Static value used for concatenation only.\n * @param v4 Value checked for change.\n * @param i4 Static value used for concatenation only.\n * @param v5 Value checked for change.\n * @param i5 Static value used for concatenation only.\n * @param v6 Value checked for change.\n * @param i6 Static value used for concatenation only.\n * @param v7 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param sanitizer An optional sanitizer function\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵpropertyInterpolate8(propName, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, i6, v7, suffix, sanitizer) {\n    const lView = getLView();\n    const interpolatedValue = interpolation8(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, i6, v7, suffix);\n    if (interpolatedValue !== NO_CHANGE) {\n        const tView = getTView();\n        const tNode = getSelectedTNode();\n        elementPropertyInternal(tView, tNode, lView, propName, interpolatedValue, lView[RENDERER], sanitizer, false);\n        ngDevMode &&\n            storePropertyBindingMetadata(tView.data, tNode, propName, getBindingIndex() - 8, prefix, i0, i1, i2, i3, i4, i5, i6, suffix);\n    }\n    return ɵɵpropertyInterpolate8;\n}\n/**\n * Update an interpolated property on an element with 9 or more bound values surrounded by text.\n *\n * Used when the number of interpolated values exceeds 8.\n *\n * ```html\n * <div\n *  title=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}-{{v5}}-{{v6}}-{{v7}}-{{v8}}-{{v9}}suffix\"></div>\n * ```\n *\n * Its compiled representation is::\n *\n * ```ts\n * ɵɵpropertyInterpolateV(\n *  'title', ['prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, '-', v5, '-', v6, '-', v7, '-', v9,\n *  'suffix']);\n * ```\n *\n * If the property name also exists as an input property on one of the element's directives,\n * the component property will be set instead of the element property. This check must\n * be conducted at runtime so child components that add new `@Inputs` don't have to be re-compiled.\n *\n * @param propName The name of the property to update.\n * @param values The collection of values and the strings inbetween those values, beginning with a\n * string prefix and ending with a string suffix.\n * (e.g. `['prefix', value0, '-', value1, '-', value2, ..., value99, 'suffix']`)\n * @param sanitizer An optional sanitizer function\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵpropertyInterpolateV(propName, values, sanitizer) {\n    const lView = getLView();\n    const interpolatedValue = interpolationV(lView, values);\n    if (interpolatedValue !== NO_CHANGE) {\n        const tView = getTView();\n        const tNode = getSelectedTNode();\n        elementPropertyInternal(tView, tNode, lView, propName, interpolatedValue, lView[RENDERER], sanitizer, false);\n        if (ngDevMode) {\n            const interpolationInBetween = [values[0]]; // prefix\n            for (let i = 2; i < values.length; i += 2) {\n                interpolationInBetween.push(values[i]);\n            }\n            storePropertyBindingMetadata(tView.data, tNode, propName, getBindingIndex() - interpolationInBetween.length + 1, ...interpolationInBetween);\n        }\n    }\n    return ɵɵpropertyInterpolateV;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * This file contains reuseable \"empty\" symbols that can be used as default return values\n * in different parts of the rendering code. Because the same symbols are returned, this\n * allows for identity checks against these values to be consistently used by the framework\n * code.\n */\nconst EMPTY_OBJ$1 = {};\nconst EMPTY_ARRAY$3 = [];\n// freezing the values prevents any code from accidentally inserting new values in\nif ((typeof ngDevMode === 'undefined' || ngDevMode) && initNgDevMode()) {\n    // These property accesses can be ignored because ngDevMode will be set to false\n    // when optimizing code and the whole if statement will be dropped.\n    // tslint:disable-next-line:no-toplevel-property-access\n    Object.freeze(EMPTY_OBJ$1);\n    // tslint:disable-next-line:no-toplevel-property-access\n    Object.freeze(EMPTY_ARRAY$3);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * NOTE: The word `styling` is used interchangeably as style or class styling.\n *\n * This file contains code to link styling instructions together so that they can be replayed in\n * priority order. The file exists because Ivy styling instruction execution order does not match\n * that of the priority order. The purpose of this code is to create a linked list so that the\n * instructions can be traversed in priority order when computing the styles.\n *\n * Assume we are dealing with the following code:\n * ```\n * @Component({\n *   template: `\n *     <my-cmp [style]=\" {color: '#001'} \"\n *             [style.color]=\" #002 \"\n *             dir-style-color-1\n *             dir-style-color-2> `\n * })\n * class ExampleComponent {\n *   static ngComp = ... {\n *     ...\n *     // Compiler ensures that `ɵɵstyleProp` is after `ɵɵstyleMap`\n *     ɵɵstyleMap({color: '#001'});\n *     ɵɵstyleProp('color', '#002');\n *     ...\n *   }\n * }\n *\n * @Directive({\n *   selector: `[dir-style-color-1]',\n * })\n * class Style1Directive {\n *   @HostBinding('style') style = {color: '#005'};\n *   @HostBinding('style.color') color = '#006';\n *\n *   static ngDir = ... {\n *     ...\n *     // Compiler ensures that `ɵɵstyleProp` is after `ɵɵstyleMap`\n *     ɵɵstyleMap({color: '#005'});\n *     ɵɵstyleProp('color', '#006');\n *     ...\n *   }\n * }\n *\n * @Directive({\n *   selector: `[dir-style-color-2]',\n * })\n * class Style2Directive {\n *   @HostBinding('style') style = {color: '#007'};\n *   @HostBinding('style.color') color = '#008';\n *\n *   static ngDir = ... {\n *     ...\n *     // Compiler ensures that `ɵɵstyleProp` is after `ɵɵstyleMap`\n *     ɵɵstyleMap({color: '#007'});\n *     ɵɵstyleProp('color', '#008');\n *     ...\n *   }\n * }\n *\n * @Directive({\n *   selector: `my-cmp',\n * })\n * class MyComponent {\n *   @HostBinding('style') style = {color: '#003'};\n *   @HostBinding('style.color') color = '#004';\n *\n *   static ngComp = ... {\n *     ...\n *     // Compiler ensures that `ɵɵstyleProp` is after `ɵɵstyleMap`\n *     ɵɵstyleMap({color: '#003'});\n *     ɵɵstyleProp('color', '#004');\n *     ...\n *   }\n * }\n * ```\n *\n * The Order of instruction execution is:\n *\n * NOTE: the comment binding location is for illustrative purposes only.\n *\n * ```\n * // Template: (ExampleComponent)\n *     ɵɵstyleMap({color: '#001'});   // Binding index: 10\n *     ɵɵstyleProp('color', '#002');  // Binding index: 12\n * // MyComponent\n *     ɵɵstyleMap({color: '#003'});   // Binding index: 20\n *     ɵɵstyleProp('color', '#004');  // Binding index: 22\n * // Style1Directive\n *     ɵɵstyleMap({color: '#005'});   // Binding index: 24\n *     ɵɵstyleProp('color', '#006');  // Binding index: 26\n * // Style2Directive\n *     ɵɵstyleMap({color: '#007'});   // Binding index: 28\n *     ɵɵstyleProp('color', '#008');  // Binding index: 30\n * ```\n *\n * The correct priority order of concatenation is:\n *\n * ```\n * // MyComponent\n *     ɵɵstyleMap({color: '#003'});   // Binding index: 20\n *     ɵɵstyleProp('color', '#004');  // Binding index: 22\n * // Style1Directive\n *     ɵɵstyleMap({color: '#005'});   // Binding index: 24\n *     ɵɵstyleProp('color', '#006');  // Binding index: 26\n * // Style2Directive\n *     ɵɵstyleMap({color: '#007'});   // Binding index: 28\n *     ɵɵstyleProp('color', '#008');  // Binding index: 30\n * // Template: (ExampleComponent)\n *     ɵɵstyleMap({color: '#001'});   // Binding index: 10\n *     ɵɵstyleProp('color', '#002');  // Binding index: 12\n * ```\n *\n * What color should be rendered?\n *\n * Once the items are correctly sorted in the list, the answer is simply the last item in the\n * concatenation list which is `#002`.\n *\n * To do so we keep a linked list of all of the bindings which pertain to this element.\n * Notice that the bindings are inserted in the order of execution, but the `TView.data` allows\n * us to traverse them in the order of priority.\n *\n * |Idx|`TView.data`|`LView`          | Notes\n * |---|------------|-----------------|--------------\n * |...|            |                 |\n * |10 |`null`      |`{color: '#001'}`| `ɵɵstyleMap('color', {color: '#001'})`\n * |11 |`30 | 12`   | ...             |\n * |12 |`color`     |`'#002'`         | `ɵɵstyleProp('color', '#002')`\n * |13 |`10 | 0`    | ...             |\n * |...|            |                 |\n * |20 |`null`      |`{color: '#003'}`| `ɵɵstyleMap('color', {color: '#003'})`\n * |21 |`0 | 22`    | ...             |\n * |22 |`color`     |`'#004'`         | `ɵɵstyleProp('color', '#004')`\n * |23 |`20 | 24`   | ...             |\n * |24 |`null`      |`{color: '#005'}`| `ɵɵstyleMap('color', {color: '#005'})`\n * |25 |`22 | 26`   | ...             |\n * |26 |`color`     |`'#006'`         | `ɵɵstyleProp('color', '#006')`\n * |27 |`24 | 28`   | ...             |\n * |28 |`null`      |`{color: '#007'}`| `ɵɵstyleMap('color', {color: '#007'})`\n * |29 |`26 | 30`   | ...             |\n * |30 |`color`     |`'#008'`         | `ɵɵstyleProp('color', '#008')`\n * |31 |`28 | 10`   | ...             |\n *\n * The above data structure allows us to re-concatenate the styling no matter which data binding\n * changes.\n *\n * NOTE: in addition to keeping track of next/previous index the `TView.data` also stores prev/next\n * duplicate bit. The duplicate bit if true says there either is a binding with the same name or\n * there is a map (which may contain the name). This information is useful in knowing if other\n * styles with higher priority need to be searched for overwrites.\n *\n * NOTE: See `should support example in 'tnode_linked_list.ts' documentation` in\n * `tnode_linked_list_spec.ts` for working example.\n */\nlet __unused_const_as_closure_does_not_like_standalone_comment_blocks__;\n/**\n * Insert new `tStyleValue` at `TData` and link existing style bindings such that we maintain linked\n * list of styles and compute the duplicate flag.\n *\n * Note: this function is executed during `firstUpdatePass` only to populate the `TView.data`.\n *\n * The function works by keeping track of `tStylingRange` which contains two pointers pointing to\n * the head/tail of the template portion of the styles.\n *  - if `isHost === false` (we are template) then insertion is at tail of `TStylingRange`\n *  - if `isHost === true` (we are host binding) then insertion is at head of `TStylingRange`\n *\n * @param tData The `TData` to insert into.\n * @param tNode `TNode` associated with the styling element.\n * @param tStylingKey See `TStylingKey`.\n * @param index location of where `tStyleValue` should be stored (and linked into list.)\n * @param isHostBinding `true` if the insertion is for a `hostBinding`. (insertion is in front of\n *               template.)\n * @param isClassBinding True if the associated `tStylingKey` as a `class` styling.\n *                       `tNode.classBindings` should be used (or `tNode.styleBindings` otherwise.)\n */\nfunction insertTStylingBinding(tData, tNode, tStylingKeyWithStatic, index, isHostBinding, isClassBinding) {\n    ngDevMode && assertFirstUpdatePass(getTView());\n    let tBindings = isClassBinding ? tNode.classBindings : tNode.styleBindings;\n    let tmplHead = getTStylingRangePrev(tBindings);\n    let tmplTail = getTStylingRangeNext(tBindings);\n    tData[index] = tStylingKeyWithStatic;\n    let isKeyDuplicateOfStatic = false;\n    let tStylingKey;\n    if (Array.isArray(tStylingKeyWithStatic)) {\n        // We are case when the `TStylingKey` contains static fields as well.\n        const staticKeyValueArray = tStylingKeyWithStatic;\n        tStylingKey = staticKeyValueArray[1]; // unwrap.\n        // We need to check if our key is present in the static so that we can mark it as duplicate.\n        if (tStylingKey === null ||\n            keyValueArrayIndexOf(staticKeyValueArray, tStylingKey) > 0) {\n            // tStylingKey is present in the statics, need to mark it as duplicate.\n            isKeyDuplicateOfStatic = true;\n        }\n    }\n    else {\n        tStylingKey = tStylingKeyWithStatic;\n    }\n    if (isHostBinding) {\n        // We are inserting host bindings\n        // If we don't have template bindings then `tail` is 0.\n        const hasTemplateBindings = tmplTail !== 0;\n        // This is important to know because that means that the `head` can't point to the first\n        // template bindings (there are none.) Instead the head points to the tail of the template.\n        if (hasTemplateBindings) {\n            // template head's \"prev\" will point to last host binding or to 0 if no host bindings yet\n            const previousNode = getTStylingRangePrev(tData[tmplHead + 1]);\n            tData[index + 1] = toTStylingRange(previousNode, tmplHead);\n            // if a host binding has already been registered, we need to update the next of that host\n            // binding to point to this one\n            if (previousNode !== 0) {\n                // We need to update the template-tail value to point to us.\n                tData[previousNode + 1] =\n                    setTStylingRangeNext(tData[previousNode + 1], index);\n            }\n            // The \"previous\" of the template binding head should point to this host binding\n            tData[tmplHead + 1] = setTStylingRangePrev(tData[tmplHead + 1], index);\n        }\n        else {\n            tData[index + 1] = toTStylingRange(tmplHead, 0);\n            // if a host binding has already been registered, we need to update the next of that host\n            // binding to point to this one\n            if (tmplHead !== 0) {\n                // We need to update the template-tail value to point to us.\n                tData[tmplHead + 1] = setTStylingRangeNext(tData[tmplHead + 1], index);\n            }\n            // if we don't have template, the head points to template-tail, and needs to be advanced.\n            tmplHead = index;\n        }\n    }\n    else {\n        // We are inserting in template section.\n        // We need to set this binding's \"previous\" to the current template tail\n        tData[index + 1] = toTStylingRange(tmplTail, 0);\n        ngDevMode &&\n            assertEqual(tmplHead !== 0 && tmplTail === 0, false, 'Adding template bindings after hostBindings is not allowed.');\n        if (tmplHead === 0) {\n            tmplHead = index;\n        }\n        else {\n            // We need to update the previous value \"next\" to point to this binding\n            tData[tmplTail + 1] = setTStylingRangeNext(tData[tmplTail + 1], index);\n        }\n        tmplTail = index;\n    }\n    // Now we need to update / compute the duplicates.\n    // Starting with our location search towards head (least priority)\n    if (isKeyDuplicateOfStatic) {\n        tData[index + 1] = setTStylingRangePrevDuplicate(tData[index + 1]);\n    }\n    markDuplicates(tData, tStylingKey, index, true, isClassBinding);\n    markDuplicates(tData, tStylingKey, index, false, isClassBinding);\n    markDuplicateOfResidualStyling(tNode, tStylingKey, tData, index, isClassBinding);\n    tBindings = toTStylingRange(tmplHead, tmplTail);\n    if (isClassBinding) {\n        tNode.classBindings = tBindings;\n    }\n    else {\n        tNode.styleBindings = tBindings;\n    }\n}\n/**\n * Look into the residual styling to see if the current `tStylingKey` is duplicate of residual.\n *\n * @param tNode `TNode` where the residual is stored.\n * @param tStylingKey `TStylingKey` to store.\n * @param tData `TData` associated with the current `LView`.\n * @param index location of where `tStyleValue` should be stored (and linked into list.)\n * @param isClassBinding True if the associated `tStylingKey` as a `class` styling.\n *                       `tNode.classBindings` should be used (or `tNode.styleBindings` otherwise.)\n */\nfunction markDuplicateOfResidualStyling(tNode, tStylingKey, tData, index, isClassBinding) {\n    const residual = isClassBinding ? tNode.residualClasses : tNode.residualStyles;\n    if (residual != null /* or undefined */ && typeof tStylingKey == 'string' &&\n        keyValueArrayIndexOf(residual, tStylingKey) >= 0) {\n        // We have duplicate in the residual so mark ourselves as duplicate.\n        tData[index + 1] = setTStylingRangeNextDuplicate(tData[index + 1]);\n    }\n}\n/**\n * Marks `TStyleValue`s as duplicates if another style binding in the list has the same\n * `TStyleValue`.\n *\n * NOTE: this function is intended to be called twice once with `isPrevDir` set to `true` and once\n * with it set to `false` to search both the previous as well as next items in the list.\n *\n * No duplicate case\n * ```\n *   [style.color]\n *   [style.width.px] <<- index\n *   [style.height.px]\n * ```\n *\n * In the above case adding `[style.width.px]` to the existing `[style.color]` produces no\n * duplicates because `width` is not found in any other part of the linked list.\n *\n * Duplicate case\n * ```\n *   [style.color]\n *   [style.width.em]\n *   [style.width.px] <<- index\n * ```\n * In the above case adding `[style.width.px]` will produce a duplicate with `[style.width.em]`\n * because `width` is found in the chain.\n *\n * Map case 1\n * ```\n *   [style.width.px]\n *   [style.color]\n *   [style]  <<- index\n * ```\n * In the above case adding `[style]` will produce a duplicate with any other bindings because\n * `[style]` is a Map and as such is fully dynamic and could produce `color` or `width`.\n *\n * Map case 2\n * ```\n *   [style]\n *   [style.width.px]\n *   [style.color]  <<- index\n * ```\n * In the above case adding `[style.color]` will produce a duplicate because there is already a\n * `[style]` binding which is a Map and as such is fully dynamic and could produce `color` or\n * `width`.\n *\n * NOTE: Once `[style]` (Map) is added into the system all things are mapped as duplicates.\n * NOTE: We use `style` as example, but same logic is applied to `class`es as well.\n *\n * @param tData `TData` where the linked list is stored.\n * @param tStylingKey `TStylingKeyPrimitive` which contains the value to compare to other keys in\n *        the linked list.\n * @param index Starting location in the linked list to search from\n * @param isPrevDir Direction.\n *        - `true` for previous (lower priority);\n *        - `false` for next (higher priority).\n */\nfunction markDuplicates(tData, tStylingKey, index, isPrevDir, isClassBinding) {\n    const tStylingAtIndex = tData[index + 1];\n    const isMap = tStylingKey === null;\n    let cursor = isPrevDir ? getTStylingRangePrev(tStylingAtIndex) : getTStylingRangeNext(tStylingAtIndex);\n    let foundDuplicate = false;\n    // We keep iterating as long as we have a cursor\n    // AND either:\n    // - we found what we are looking for, OR\n    // - we are a map in which case we have to continue searching even after we find what we were\n    //   looking for since we are a wild card and everything needs to be flipped to duplicate.\n    while (cursor !== 0 && (foundDuplicate === false || isMap)) {\n        ngDevMode && assertIndexInRange(tData, cursor);\n        const tStylingValueAtCursor = tData[cursor];\n        const tStyleRangeAtCursor = tData[cursor + 1];\n        if (isStylingMatch(tStylingValueAtCursor, tStylingKey)) {\n            foundDuplicate = true;\n            tData[cursor + 1] = isPrevDir ? setTStylingRangeNextDuplicate(tStyleRangeAtCursor) :\n                setTStylingRangePrevDuplicate(tStyleRangeAtCursor);\n        }\n        cursor = isPrevDir ? getTStylingRangePrev(tStyleRangeAtCursor) :\n            getTStylingRangeNext(tStyleRangeAtCursor);\n    }\n    if (foundDuplicate) {\n        // if we found a duplicate, than mark ourselves.\n        tData[index + 1] = isPrevDir ? setTStylingRangePrevDuplicate(tStylingAtIndex) :\n            setTStylingRangeNextDuplicate(tStylingAtIndex);\n    }\n}\n/**\n * Determines if two `TStylingKey`s are a match.\n *\n * When computing weather a binding contains a duplicate, we need to compare if the instruction\n * `TStylingKey` has a match.\n *\n * Here are examples of `TStylingKey`s which match given `tStylingKeyCursor` is:\n * - `color`\n *    - `color`    // Match another color\n *    - `null`     // That means that `tStylingKey` is a `classMap`/`styleMap` instruction\n *    - `['', 'color', 'other', true]` // wrapped `color` so match\n *    - `['', null, 'other', true]`       // wrapped `null` so match\n *    - `['', 'width', 'color', 'value']` // wrapped static value contains a match on `'color'`\n * - `null`       // `tStylingKeyCursor` always match as it is `classMap`/`styleMap` instruction\n *\n * @param tStylingKeyCursor\n * @param tStylingKey\n */\nfunction isStylingMatch(tStylingKeyCursor, tStylingKey) {\n    ngDevMode &&\n        assertNotEqual(Array.isArray(tStylingKey), true, 'Expected that \\'tStylingKey\\' has been unwrapped');\n    if (tStylingKeyCursor === null || // If the cursor is `null` it means that we have map at that\n        // location so we must assume that we have a match.\n        tStylingKey == null || // If `tStylingKey` is `null` then it is a map therefor assume that it\n        // contains a match.\n        (Array.isArray(tStylingKeyCursor) ? tStylingKeyCursor[1] : tStylingKeyCursor) ===\n            tStylingKey // If the keys match explicitly than we are a match.\n    ) {\n        return true;\n    }\n    else if (Array.isArray(tStylingKeyCursor) && typeof tStylingKey === 'string') {\n        // if we did not find a match, but `tStylingKeyCursor` is `KeyValueArray` that means cursor has\n        // statics and we need to check those as well.\n        return keyValueArrayIndexOf(tStylingKeyCursor, tStylingKey) >=\n            0; // see if we are matching the key\n    }\n    return false;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// Global state of the parser. (This makes parser non-reentrant, but that is not an issue)\nconst parserState = {\n    textEnd: 0,\n    key: 0,\n    keyEnd: 0,\n    value: 0,\n    valueEnd: 0,\n};\n/**\n * Retrieves the last parsed `key` of style.\n * @param text the text to substring the key from.\n */\nfunction getLastParsedKey(text) {\n    return text.substring(parserState.key, parserState.keyEnd);\n}\n/**\n * Retrieves the last parsed `value` of style.\n * @param text the text to substring the key from.\n */\nfunction getLastParsedValue(text) {\n    return text.substring(parserState.value, parserState.valueEnd);\n}\n/**\n * Initializes `className` string for parsing and parses the first token.\n *\n * This function is intended to be used in this format:\n * ```\n * for (let i = parseClassName(text); i >= 0; i = parseClassNameNext(text, i)) {\n *   const key = getLastParsedKey();\n *   ...\n * }\n * ```\n * @param text `className` to parse\n * @returns index where the next invocation of `parseClassNameNext` should resume.\n */\nfunction parseClassName(text) {\n    resetParserState(text);\n    return parseClassNameNext(text, consumeWhitespace(text, 0, parserState.textEnd));\n}\n/**\n * Parses next `className` token.\n *\n * This function is intended to be used in this format:\n * ```\n * for (let i = parseClassName(text); i >= 0; i = parseClassNameNext(text, i)) {\n *   const key = getLastParsedKey();\n *   ...\n * }\n * ```\n *\n * @param text `className` to parse\n * @param index where the parsing should resume.\n * @returns index where the next invocation of `parseClassNameNext` should resume.\n */\nfunction parseClassNameNext(text, index) {\n    const end = parserState.textEnd;\n    if (end === index) {\n        return -1;\n    }\n    index = parserState.keyEnd = consumeClassToken(text, parserState.key = index, end);\n    return consumeWhitespace(text, index, end);\n}\n/**\n * Initializes `cssText` string for parsing and parses the first key/values.\n *\n * This function is intended to be used in this format:\n * ```\n * for (let i = parseStyle(text); i >= 0; i = parseStyleNext(text, i))) {\n *   const key = getLastParsedKey();\n *   const value = getLastParsedValue();\n *   ...\n * }\n * ```\n * @param text `cssText` to parse\n * @returns index where the next invocation of `parseStyleNext` should resume.\n */\nfunction parseStyle(text) {\n    resetParserState(text);\n    return parseStyleNext(text, consumeWhitespace(text, 0, parserState.textEnd));\n}\n/**\n * Parses the next `cssText` key/values.\n *\n * This function is intended to be used in this format:\n * ```\n * for (let i = parseStyle(text); i >= 0; i = parseStyleNext(text, i))) {\n *   const key = getLastParsedKey();\n *   const value = getLastParsedValue();\n *   ...\n * }\n *\n * @param text `cssText` to parse\n * @param index where the parsing should resume.\n * @returns index where the next invocation of `parseStyleNext` should resume.\n */\nfunction parseStyleNext(text, startIndex) {\n    const end = parserState.textEnd;\n    let index = parserState.key = consumeWhitespace(text, startIndex, end);\n    if (end === index) {\n        // we reached an end so just quit\n        return -1;\n    }\n    index = parserState.keyEnd = consumeStyleKey(text, index, end);\n    index = consumeSeparator(text, index, end, 58 /* COLON */);\n    index = parserState.value = consumeWhitespace(text, index, end);\n    index = parserState.valueEnd = consumeStyleValue(text, index, end);\n    return consumeSeparator(text, index, end, 59 /* SEMI_COLON */);\n}\n/**\n * Reset the global state of the styling parser.\n * @param text The styling text to parse.\n */\nfunction resetParserState(text) {\n    parserState.key = 0;\n    parserState.keyEnd = 0;\n    parserState.value = 0;\n    parserState.valueEnd = 0;\n    parserState.textEnd = text.length;\n}\n/**\n * Returns index of next non-whitespace character.\n *\n * @param text Text to scan\n * @param startIndex Starting index of character where the scan should start.\n * @param endIndex Ending index of character where the scan should end.\n * @returns Index of next non-whitespace character (May be the same as `start` if no whitespace at\n *          that location.)\n */\nfunction consumeWhitespace(text, startIndex, endIndex) {\n    while (startIndex < endIndex && text.charCodeAt(startIndex) <= 32 /* SPACE */) {\n        startIndex++;\n    }\n    return startIndex;\n}\n/**\n * Returns index of last char in class token.\n *\n * @param text Text to scan\n * @param startIndex Starting index of character where the scan should start.\n * @param endIndex Ending index of character where the scan should end.\n * @returns Index after last char in class token.\n */\nfunction consumeClassToken(text, startIndex, endIndex) {\n    while (startIndex < endIndex && text.charCodeAt(startIndex) > 32 /* SPACE */) {\n        startIndex++;\n    }\n    return startIndex;\n}\n/**\n * Consumes all of the characters belonging to style key and token.\n *\n * @param text Text to scan\n * @param startIndex Starting index of character where the scan should start.\n * @param endIndex Ending index of character where the scan should end.\n * @returns Index after last style key character.\n */\nfunction consumeStyleKey(text, startIndex, endIndex) {\n    let ch;\n    while (startIndex < endIndex &&\n        ((ch = text.charCodeAt(startIndex)) === 45 /* DASH */ || ch === 95 /* UNDERSCORE */ ||\n            ((ch & -33 /* UPPER_CASE */) >= 65 /* A */ && (ch & -33 /* UPPER_CASE */) <= 90 /* Z */) ||\n            (ch >= 48 /* ZERO */ && ch <= 57 /* NINE */))) {\n        startIndex++;\n    }\n    return startIndex;\n}\n/**\n * Consumes all whitespace and the separator `:` after the style key.\n *\n * @param text Text to scan\n * @param startIndex Starting index of character where the scan should start.\n * @param endIndex Ending index of character where the scan should end.\n * @returns Index after separator and surrounding whitespace.\n */\nfunction consumeSeparator(text, startIndex, endIndex, separator) {\n    startIndex = consumeWhitespace(text, startIndex, endIndex);\n    if (startIndex < endIndex) {\n        if (ngDevMode && text.charCodeAt(startIndex) !== separator) {\n            malformedStyleError(text, String.fromCharCode(separator), startIndex);\n        }\n        startIndex++;\n    }\n    return startIndex;\n}\n/**\n * Consumes style value honoring `url()` and `\"\"` text.\n *\n * @param text Text to scan\n * @param startIndex Starting index of character where the scan should start.\n * @param endIndex Ending index of character where the scan should end.\n * @returns Index after last style value character.\n */\nfunction consumeStyleValue(text, startIndex, endIndex) {\n    let ch1 = -1; // 1st previous character\n    let ch2 = -1; // 2nd previous character\n    let ch3 = -1; // 3rd previous character\n    let i = startIndex;\n    let lastChIndex = i;\n    while (i < endIndex) {\n        const ch = text.charCodeAt(i++);\n        if (ch === 59 /* SEMI_COLON */) {\n            return lastChIndex;\n        }\n        else if (ch === 34 /* DOUBLE_QUOTE */ || ch === 39 /* SINGLE_QUOTE */) {\n            lastChIndex = i = consumeQuotedText(text, ch, i, endIndex);\n        }\n        else if (startIndex ===\n            i - 4 && // We have seen only 4 characters so far \"URL(\" (Ignore \"foo_URL()\")\n            ch3 === 85 /* U */ &&\n            ch2 === 82 /* R */ && ch1 === 76 /* L */ && ch === 40 /* OPEN_PAREN */) {\n            lastChIndex = i = consumeQuotedText(text, 41 /* CLOSE_PAREN */, i, endIndex);\n        }\n        else if (ch > 32 /* SPACE */) {\n            // if we have a non-whitespace character then capture its location\n            lastChIndex = i;\n        }\n        ch3 = ch2;\n        ch2 = ch1;\n        ch1 = ch & -33 /* UPPER_CASE */;\n    }\n    return lastChIndex;\n}\n/**\n * Consumes all of the quoted characters.\n *\n * @param text Text to scan\n * @param quoteCharCode CharCode of either `\"` or `'` quote or `)` for `url(...)`.\n * @param startIndex Starting index of character where the scan should start.\n * @param endIndex Ending index of character where the scan should end.\n * @returns Index after quoted characters.\n */\nfunction consumeQuotedText(text, quoteCharCode, startIndex, endIndex) {\n    let ch1 = -1; // 1st previous character\n    let index = startIndex;\n    while (index < endIndex) {\n        const ch = text.charCodeAt(index++);\n        if (ch == quoteCharCode && ch1 !== 92 /* BACK_SLASH */) {\n            return index;\n        }\n        if (ch == 92 /* BACK_SLASH */ && ch1 === 92 /* BACK_SLASH */) {\n            // two back slashes cancel each other out. For example `\"\\\\\"` should properly end the\n            // quotation. (It should not assume that the last `\"` is escaped.)\n            ch1 = 0;\n        }\n        else {\n            ch1 = ch;\n        }\n    }\n    throw ngDevMode ? malformedStyleError(text, String.fromCharCode(quoteCharCode), endIndex) :\n        new Error();\n}\nfunction malformedStyleError(text, expecting, index) {\n    ngDevMode && assertEqual(typeof text === 'string', true, 'String expected here');\n    throw throwError(`Malformed style at location ${index} in string '` + text.substring(0, index) + '[>>' +\n        text.substring(index, index + 1) + '<<]' + text.substr(index + 1) +\n        `'. Expecting '${expecting}'.`);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Update a style binding on an element with the provided value.\n *\n * If the style value is falsy then it will be removed from the element\n * (or assigned a different value depending if there are any styles placed\n * on the element with `styleMap` or any static styles that are\n * present from when the element was created with `styling`).\n *\n * Note that the styling element is updated as part of `stylingApply`.\n *\n * @param prop A valid CSS property.\n * @param value New value to write (`null` or an empty string to remove).\n * @param suffix Optional suffix. Used with scalar values to add unit such as `px`.\n *\n * Note that this will apply the provided style value to the host element if this function is called\n * within a host binding function.\n *\n * @codeGenApi\n */\nfunction ɵɵstyleProp(prop, value, suffix) {\n    checkStylingProperty(prop, value, suffix, false);\n    return ɵɵstyleProp;\n}\n/**\n * Update a class binding on an element with the provided value.\n *\n * This instruction is meant to handle the `[class.foo]=\"exp\"` case and,\n * therefore, the class binding itself must already be allocated using\n * `styling` within the creation block.\n *\n * @param prop A valid CSS class (only one).\n * @param value A true/false value which will turn the class on or off.\n *\n * Note that this will apply the provided class value to the host element if this function\n * is called within a host binding function.\n *\n * @codeGenApi\n */\nfunction ɵɵclassProp(className, value) {\n    checkStylingProperty(className, value, null, true);\n    return ɵɵclassProp;\n}\n/**\n * Update style bindings using an object literal on an element.\n *\n * This instruction is meant to apply styling via the `[style]=\"exp\"` template bindings.\n * When styles are applied to the element they will then be updated with respect to\n * any styles/classes set via `styleProp`. If any styles are set to falsy\n * then they will be removed from the element.\n *\n * Note that the styling instruction will not be applied until `stylingApply` is called.\n *\n * @param styles A key/value style map of the styles that will be applied to the given element.\n *        Any missing styles (that have already been applied to the element beforehand) will be\n *        removed (unset) from the element's styling.\n *\n * Note that this will apply the provided styleMap value to the host element if this function\n * is called within a host binding.\n *\n * @codeGenApi\n */\nfunction ɵɵstyleMap(styles) {\n    checkStylingMap(styleKeyValueArraySet, styleStringParser, styles, false);\n}\n/**\n * Parse text as style and add values to KeyValueArray.\n *\n * This code is pulled out to a separate function so that it can be tree shaken away if it is not\n * needed. It is only referenced from `ɵɵstyleMap`.\n *\n * @param keyValueArray KeyValueArray to add parsed values to.\n * @param text text to parse.\n */\nfunction styleStringParser(keyValueArray, text) {\n    for (let i = parseStyle(text); i >= 0; i = parseStyleNext(text, i)) {\n        styleKeyValueArraySet(keyValueArray, getLastParsedKey(text), getLastParsedValue(text));\n    }\n}\n/**\n * Update class bindings using an object literal or class-string on an element.\n *\n * This instruction is meant to apply styling via the `[class]=\"exp\"` template bindings.\n * When classes are applied to the element they will then be updated with\n * respect to any styles/classes set via `classProp`. If any\n * classes are set to falsy then they will be removed from the element.\n *\n * Note that the styling instruction will not be applied until `stylingApply` is called.\n * Note that this will the provided classMap value to the host element if this function is called\n * within a host binding.\n *\n * @param classes A key/value map or string of CSS classes that will be added to the\n *        given element. Any missing classes (that have already been applied to the element\n *        beforehand) will be removed (unset) from the element's list of CSS classes.\n *\n * @codeGenApi\n */\nfunction ɵɵclassMap(classes) {\n    checkStylingMap(keyValueArraySet, classStringParser, classes, true);\n}\n/**\n * Parse text as class and add values to KeyValueArray.\n *\n * This code is pulled out to a separate function so that it can be tree shaken away if it is not\n * needed. It is only referenced from `ɵɵclassMap`.\n *\n * @param keyValueArray KeyValueArray to add parsed values to.\n * @param text text to parse.\n */\nfunction classStringParser(keyValueArray, text) {\n    for (let i = parseClassName(text); i >= 0; i = parseClassNameNext(text, i)) {\n        keyValueArraySet(keyValueArray, getLastParsedKey(text), true);\n    }\n}\n/**\n * Common code between `ɵɵclassProp` and `ɵɵstyleProp`.\n *\n * @param prop property name.\n * @param value binding value.\n * @param suffix suffix for the property (e.g. `em` or `px`)\n * @param isClassBased `true` if `class` change (`false` if `style`)\n */\nfunction checkStylingProperty(prop, value, suffix, isClassBased) {\n    const lView = getLView();\n    const tView = getTView();\n    // Styling instructions use 2 slots per binding.\n    // 1. one for the value / TStylingKey\n    // 2. one for the intermittent-value / TStylingRange\n    const bindingIndex = incrementBindingIndex(2);\n    if (tView.firstUpdatePass) {\n        stylingFirstUpdatePass(tView, prop, bindingIndex, isClassBased);\n    }\n    if (value !== NO_CHANGE && bindingUpdated(lView, bindingIndex, value)) {\n        const tNode = tView.data[getSelectedIndex() + HEADER_OFFSET];\n        updateStyling(tView, tNode, lView, lView[RENDERER], prop, lView[bindingIndex + 1] = normalizeSuffix(value, suffix), isClassBased, bindingIndex);\n    }\n}\n/**\n * Common code between `ɵɵclassMap` and `ɵɵstyleMap`.\n *\n * @param keyValueArraySet (See `keyValueArraySet` in \"util/array_utils\") Gets passed in as a\n *        function so that `style` can be processed. This is done for tree shaking purposes.\n * @param stringParser Parser used to parse `value` if `string`. (Passed in as `style` and `class`\n *        have different parsers.)\n * @param value bound value from application\n * @param isClassBased `true` if `class` change (`false` if `style`)\n */\nfunction checkStylingMap(keyValueArraySet, stringParser, value, isClassBased) {\n    const tView = getTView();\n    const bindingIndex = incrementBindingIndex(2);\n    if (tView.firstUpdatePass) {\n        stylingFirstUpdatePass(tView, null, bindingIndex, isClassBased);\n    }\n    const lView = getLView();\n    if (value !== NO_CHANGE && bindingUpdated(lView, bindingIndex, value)) {\n        // `getSelectedIndex()` should be here (rather than in instruction) so that it is guarded by the\n        // if so as not to read unnecessarily.\n        const tNode = tView.data[getSelectedIndex() + HEADER_OFFSET];\n        if (hasStylingInputShadow(tNode, isClassBased) && !isInHostBindings(tView, bindingIndex)) {\n            if (ngDevMode) {\n                // verify that if we are shadowing then `TData` is appropriately marked so that we skip\n                // processing this binding in styling resolution.\n                const tStylingKey = tView.data[bindingIndex];\n                assertEqual(Array.isArray(tStylingKey) ? tStylingKey[1] : tStylingKey, false, 'Styling linked list shadow input should be marked as \\'false\\'');\n            }\n            // VE does not concatenate the static portion like we are doing here.\n            // Instead VE just ignores the static completely if dynamic binding is present.\n            // Because of locality we have already set the static portion because we don't know if there\n            // is a dynamic portion until later. If we would ignore the static portion it would look like\n            // the binding has removed it. This would confuse `[ngStyle]`/`[ngClass]` to do the wrong\n            // thing as it would think that the static portion was removed. For this reason we\n            // concatenate it so that `[ngStyle]`/`[ngClass]`  can continue to work on changed.\n            let staticPrefix = isClassBased ? tNode.classesWithoutHost : tNode.stylesWithoutHost;\n            ngDevMode && isClassBased === false && staticPrefix !== null &&\n                assertEqual(staticPrefix.endsWith(';'), true, 'Expecting static portion to end with \\';\\'');\n            if (staticPrefix !== null) {\n                // We want to make sure that falsy values of `value` become empty strings.\n                value = concatStringsWithSpace(staticPrefix, value ? value : '');\n            }\n            // Given `<div [style] my-dir>` such that `my-dir` has `@Input('style')`.\n            // This takes over the `[style]` binding. (Same for `[class]`)\n            setDirectiveInputsWhichShadowsStyling(tView, tNode, lView, value, isClassBased);\n        }\n        else {\n            updateStylingMap(tView, tNode, lView, lView[RENDERER], lView[bindingIndex + 1], lView[bindingIndex + 1] = toStylingKeyValueArray(keyValueArraySet, stringParser, value), isClassBased, bindingIndex);\n        }\n    }\n}\n/**\n * Determines when the binding is in `hostBindings` section\n *\n * @param tView Current `TView`\n * @param bindingIndex index of binding which we would like if it is in `hostBindings`\n */\nfunction isInHostBindings(tView, bindingIndex) {\n    // All host bindings are placed after the expando section.\n    return bindingIndex >= tView.expandoStartIndex;\n}\n/**\n * Collects the necessary information to insert the binding into a linked list of style bindings\n * using `insertTStylingBinding`.\n *\n * @param tView `TView` where the binding linked list will be stored.\n * @param tStylingKey Property/key of the binding.\n * @param bindingIndex Index of binding associated with the `prop`\n * @param isClassBased `true` if `class` change (`false` if `style`)\n */\nfunction stylingFirstUpdatePass(tView, tStylingKey, bindingIndex, isClassBased) {\n    ngDevMode && assertFirstUpdatePass(tView);\n    const tData = tView.data;\n    if (tData[bindingIndex + 1] === null) {\n        // The above check is necessary because we don't clear first update pass until first successful\n        // (no exception) template execution. This prevents the styling instruction from double adding\n        // itself to the list.\n        // `getSelectedIndex()` should be here (rather than in instruction) so that it is guarded by the\n        // if so as not to read unnecessarily.\n        const tNode = tData[getSelectedIndex() + HEADER_OFFSET];\n        const isHostBindings = isInHostBindings(tView, bindingIndex);\n        if (hasStylingInputShadow(tNode, isClassBased) && tStylingKey === null && !isHostBindings) {\n            // `tStylingKey === null` implies that we are either `[style]` or `[class]` binding.\n            // If there is a directive which uses `@Input('style')` or `@Input('class')` than\n            // we need to neutralize this binding since that directive is shadowing it.\n            // We turn this into a noop by setting the key to `false`\n            tStylingKey = false;\n        }\n        tStylingKey = wrapInStaticStylingKey(tData, tNode, tStylingKey, isClassBased);\n        insertTStylingBinding(tData, tNode, tStylingKey, bindingIndex, isHostBindings, isClassBased);\n    }\n}\n/**\n * Adds static styling information to the binding if applicable.\n *\n * The linked list of styles not only stores the list and keys, but also stores static styling\n * information on some of the keys. This function determines if the key should contain the styling\n * information and computes it.\n *\n * See `TStylingStatic` for more details.\n *\n * @param tData `TData` where the linked list is stored.\n * @param tNode `TNode` for which the styling is being computed.\n * @param stylingKey `TStylingKeyPrimitive` which may need to be wrapped into `TStylingKey`\n * @param isClassBased `true` if `class` (`false` if `style`)\n */\nfunction wrapInStaticStylingKey(tData, tNode, stylingKey, isClassBased) {\n    const hostDirectiveDef = getCurrentDirectiveDef(tData);\n    let residual = isClassBased ? tNode.residualClasses : tNode.residualStyles;\n    if (hostDirectiveDef === null) {\n        // We are in template node.\n        // If template node already had styling instruction then it has already collected the static\n        // styling and there is no need to collect them again. We know that we are the first styling\n        // instruction because the `TNode.*Bindings` points to 0 (nothing has been inserted yet).\n        const isFirstStylingInstructionInTemplate = (isClassBased ? tNode.classBindings : tNode.styleBindings) === 0;\n        if (isFirstStylingInstructionInTemplate) {\n            // It would be nice to be able to get the statics from `mergeAttrs`, however, at this point\n            // they are already merged and it would not be possible to figure which property belongs where\n            // in the priority.\n            stylingKey = collectStylingFromDirectives(null, tData, tNode, stylingKey, isClassBased);\n            stylingKey = collectStylingFromTAttrs(stylingKey, tNode.attrs, isClassBased);\n            // We know that if we have styling binding in template we can't have residual.\n            residual = null;\n        }\n    }\n    else {\n        // We are in host binding node and there was no binding instruction in template node.\n        // This means that we need to compute the residual.\n        const directiveStylingLast = tNode.directiveStylingLast;\n        const isFirstStylingInstructionInHostBinding = directiveStylingLast === -1 || tData[directiveStylingLast] !== hostDirectiveDef;\n        if (isFirstStylingInstructionInHostBinding) {\n            stylingKey =\n                collectStylingFromDirectives(hostDirectiveDef, tData, tNode, stylingKey, isClassBased);\n            if (residual === null) {\n                // - If `null` than either:\n                //    - Template styling instruction already ran and it has consumed the static\n                //      styling into its `TStylingKey` and so there is no need to update residual. Instead\n                //      we need to update the `TStylingKey` associated with the first template node\n                //      instruction. OR\n                //    - Some other styling instruction ran and determined that there are no residuals\n                let templateStylingKey = getTemplateHeadTStylingKey(tData, tNode, isClassBased);\n                if (templateStylingKey !== undefined && Array.isArray(templateStylingKey)) {\n                    // Only recompute if `templateStylingKey` had static values. (If no static value found\n                    // then there is nothing to do since this operation can only produce less static keys, not\n                    // more.)\n                    templateStylingKey = collectStylingFromDirectives(null, tData, tNode, templateStylingKey[1] /* unwrap previous statics */, isClassBased);\n                    templateStylingKey =\n                        collectStylingFromTAttrs(templateStylingKey, tNode.attrs, isClassBased);\n                    setTemplateHeadTStylingKey(tData, tNode, isClassBased, templateStylingKey);\n                }\n            }\n            else {\n                // We only need to recompute residual if it is not `null`.\n                // - If existing residual (implies there was no template styling). This means that some of\n                //   the statics may have moved from the residual to the `stylingKey` and so we have to\n                //   recompute.\n                // - If `undefined` this is the first time we are running.\n                residual = collectResidual(tData, tNode, isClassBased);\n            }\n        }\n    }\n    if (residual !== undefined) {\n        isClassBased ? (tNode.residualClasses = residual) : (tNode.residualStyles = residual);\n    }\n    return stylingKey;\n}\n/**\n * Retrieve the `TStylingKey` for the template styling instruction.\n *\n * This is needed since `hostBinding` styling instructions are inserted after the template\n * instruction. While the template instruction needs to update the residual in `TNode` the\n * `hostBinding` instructions need to update the `TStylingKey` of the template instruction because\n * the template instruction is downstream from the `hostBindings` instructions.\n *\n * @param tData `TData` where the linked list is stored.\n * @param tNode `TNode` for which the styling is being computed.\n * @param isClassBased `true` if `class` (`false` if `style`)\n * @return `TStylingKey` if found or `undefined` if not found.\n */\nfunction getTemplateHeadTStylingKey(tData, tNode, isClassBased) {\n    const bindings = isClassBased ? tNode.classBindings : tNode.styleBindings;\n    if (getTStylingRangeNext(bindings) === 0) {\n        // There does not seem to be a styling instruction in the `template`.\n        return undefined;\n    }\n    return tData[getTStylingRangePrev(bindings)];\n}\n/**\n * Update the `TStylingKey` of the first template instruction in `TNode`.\n *\n * Logically `hostBindings` styling instructions are of lower priority than that of the template.\n * However, they execute after the template styling instructions. This means that they get inserted\n * in front of the template styling instructions.\n *\n * If we have a template styling instruction and a new `hostBindings` styling instruction is\n * executed it means that it may need to steal static fields from the template instruction. This\n * method allows us to update the first template instruction `TStylingKey` with a new value.\n *\n * Assume:\n * ```\n * <div my-dir style=\"color: red\" [style.color]=\"tmplExp\"></div>\n *\n * @Directive({\n *   host: {\n *     'style': 'width: 100px',\n *     '[style.color]': 'dirExp',\n *   }\n * })\n * class MyDir {}\n * ```\n *\n * when `[style.color]=\"tmplExp\"` executes it creates this data structure.\n * ```\n *  ['', 'color', 'color', 'red', 'width', '100px'],\n * ```\n *\n * The reason for this is that the template instruction does not know if there are styling\n * instructions and must assume that there are none and must collect all of the static styling.\n * (both\n * `color' and 'width`)\n *\n * When `'[style.color]': 'dirExp',` executes we need to insert a new data into the linked list.\n * ```\n *  ['', 'color', 'width', '100px'],  // newly inserted\n *  ['', 'color', 'color', 'red', 'width', '100px'], // this is wrong\n * ```\n *\n * Notice that the template statics is now wrong as it incorrectly contains `width` so we need to\n * update it like so:\n * ```\n *  ['', 'color', 'width', '100px'],\n *  ['', 'color', 'color', 'red'],    // UPDATE\n * ```\n *\n * @param tData `TData` where the linked list is stored.\n * @param tNode `TNode` for which the styling is being computed.\n * @param isClassBased `true` if `class` (`false` if `style`)\n * @param tStylingKey New `TStylingKey` which is replacing the old one.\n */\nfunction setTemplateHeadTStylingKey(tData, tNode, isClassBased, tStylingKey) {\n    const bindings = isClassBased ? tNode.classBindings : tNode.styleBindings;\n    ngDevMode &&\n        assertNotEqual(getTStylingRangeNext(bindings), 0, 'Expecting to have at least one template styling binding.');\n    tData[getTStylingRangePrev(bindings)] = tStylingKey;\n}\n/**\n * Collect all static values after the current `TNode.directiveStylingLast` index.\n *\n * Collect the remaining styling information which has not yet been collected by an existing\n * styling instruction.\n *\n * @param tData `TData` where the `DirectiveDefs` are stored.\n * @param tNode `TNode` which contains the directive range.\n * @param isClassBased `true` if `class` (`false` if `style`)\n */\nfunction collectResidual(tData, tNode, isClassBased) {\n    let residual = undefined;\n    const directiveEnd = tNode.directiveEnd;\n    ngDevMode &&\n        assertNotEqual(tNode.directiveStylingLast, -1, 'By the time this function gets called at least one hostBindings-node styling instruction must have executed.');\n    // We add `1 + tNode.directiveStart` because we need to skip the current directive (as we are\n    // collecting things after the last `hostBindings` directive which had a styling instruction.)\n    for (let i = 1 + tNode.directiveStylingLast; i < directiveEnd; i++) {\n        const attrs = tData[i].hostAttrs;\n        residual = collectStylingFromTAttrs(residual, attrs, isClassBased);\n    }\n    return collectStylingFromTAttrs(residual, tNode.attrs, isClassBased);\n}\n/**\n * Collect the static styling information with lower priority than `hostDirectiveDef`.\n *\n * (This is opposite of residual styling.)\n *\n * @param hostDirectiveDef `DirectiveDef` for which we want to collect lower priority static\n *        styling. (Or `null` if template styling)\n * @param tData `TData` where the linked list is stored.\n * @param tNode `TNode` for which the styling is being computed.\n * @param stylingKey Existing `TStylingKey` to update or wrap.\n * @param isClassBased `true` if `class` (`false` if `style`)\n */\nfunction collectStylingFromDirectives(hostDirectiveDef, tData, tNode, stylingKey, isClassBased) {\n    // We need to loop because there can be directives which have `hostAttrs` but don't have\n    // `hostBindings` so this loop catches up to the current directive..\n    let currentDirective = null;\n    const directiveEnd = tNode.directiveEnd;\n    let directiveStylingLast = tNode.directiveStylingLast;\n    if (directiveStylingLast === -1) {\n        directiveStylingLast = tNode.directiveStart;\n    }\n    else {\n        directiveStylingLast++;\n    }\n    while (directiveStylingLast < directiveEnd) {\n        currentDirective = tData[directiveStylingLast];\n        ngDevMode && assertDefined(currentDirective, 'expected to be defined');\n        stylingKey = collectStylingFromTAttrs(stylingKey, currentDirective.hostAttrs, isClassBased);\n        if (currentDirective === hostDirectiveDef)\n            break;\n        directiveStylingLast++;\n    }\n    if (hostDirectiveDef !== null) {\n        // we only advance the styling cursor if we are collecting data from host bindings.\n        // Template executes before host bindings and so if we would update the index,\n        // host bindings would not get their statics.\n        tNode.directiveStylingLast = directiveStylingLast;\n    }\n    return stylingKey;\n}\n/**\n * Convert `TAttrs` into `TStylingStatic`.\n *\n * @param stylingKey existing `TStylingKey` to update or wrap.\n * @param attrs `TAttributes` to process.\n * @param isClassBased `true` if `class` (`false` if `style`)\n */\nfunction collectStylingFromTAttrs(stylingKey, attrs, isClassBased) {\n    const desiredMarker = isClassBased ? 1 /* Classes */ : 2 /* Styles */;\n    let currentMarker = -1 /* ImplicitAttributes */;\n    if (attrs !== null) {\n        for (let i = 0; i < attrs.length; i++) {\n            const item = attrs[i];\n            if (typeof item === 'number') {\n                currentMarker = item;\n            }\n            else {\n                if (currentMarker === desiredMarker) {\n                    if (!Array.isArray(stylingKey)) {\n                        stylingKey = stylingKey === undefined ? [] : ['', stylingKey];\n                    }\n                    keyValueArraySet(stylingKey, item, isClassBased ? true : attrs[++i]);\n                }\n            }\n        }\n    }\n    return stylingKey === undefined ? null : stylingKey;\n}\n/**\n * Convert user input to `KeyValueArray`.\n *\n * This function takes user input which could be `string`, Object literal, or iterable and converts\n * it into a consistent representation. The output of this is `KeyValueArray` (which is an array\n * where\n * even indexes contain keys and odd indexes contain values for those keys).\n *\n * The advantage of converting to `KeyValueArray` is that we can perform diff in an input\n * independent\n * way.\n * (ie we can compare `foo bar` to `['bar', 'baz'] and determine a set of changes which need to be\n * applied)\n *\n * The fact that `KeyValueArray` is sorted is very important because it allows us to compute the\n * difference in linear fashion without the need to allocate any additional data.\n *\n * For example if we kept this as a `Map` we would have to iterate over previous `Map` to determine\n * which values need to be deleted, over the new `Map` to determine additions, and we would have to\n * keep additional `Map` to keep track of duplicates or items which have not yet been visited.\n *\n * @param keyValueArraySet (See `keyValueArraySet` in \"util/array_utils\") Gets passed in as a\n *        function so that `style` can be processed. This is done\n *        for tree shaking purposes.\n * @param stringParser The parser is passed in so that it will be tree shakable. See\n *        `styleStringParser` and `classStringParser`\n * @param value The value to parse/convert to `KeyValueArray`\n */\nfunction toStylingKeyValueArray(keyValueArraySet, stringParser, value) {\n    if (value == null /*|| value === undefined */ || value === '')\n        return EMPTY_ARRAY$3;\n    const styleKeyValueArray = [];\n    const unwrappedValue = unwrapSafeValue(value);\n    if (Array.isArray(unwrappedValue)) {\n        for (let i = 0; i < unwrappedValue.length; i++) {\n            keyValueArraySet(styleKeyValueArray, unwrappedValue[i], true);\n        }\n    }\n    else if (typeof unwrappedValue === 'object') {\n        for (const key in unwrappedValue) {\n            if (unwrappedValue.hasOwnProperty(key)) {\n                keyValueArraySet(styleKeyValueArray, key, unwrappedValue[key]);\n            }\n        }\n    }\n    else if (typeof unwrappedValue === 'string') {\n        stringParser(styleKeyValueArray, unwrappedValue);\n    }\n    else {\n        ngDevMode &&\n            throwError('Unsupported styling type ' + typeof unwrappedValue + ': ' + unwrappedValue);\n    }\n    return styleKeyValueArray;\n}\n/**\n * Set a `value` for a `key`.\n *\n * See: `keyValueArraySet` for details\n *\n * @param keyValueArray KeyValueArray to add to.\n * @param key Style key to add.\n * @param value The value to set.\n */\nfunction styleKeyValueArraySet(keyValueArray, key, value) {\n    keyValueArraySet(keyValueArray, key, unwrapSafeValue(value));\n}\n/**\n * Update map based styling.\n *\n * Map based styling could be anything which contains more than one binding. For example `string`,\n * or object literal. Dealing with all of these types would complicate the logic so\n * instead this function expects that the complex input is first converted into normalized\n * `KeyValueArray`. The advantage of normalization is that we get the values sorted, which makes it\n * very cheap to compute deltas between the previous and current value.\n *\n * @param tView Associated `TView.data` contains the linked list of binding priorities.\n * @param tNode `TNode` where the binding is located.\n * @param lView `LView` contains the values associated with other styling binding at this `TNode`.\n * @param renderer Renderer to use if any updates.\n * @param oldKeyValueArray Previous value represented as `KeyValueArray`\n * @param newKeyValueArray Current value represented as `KeyValueArray`\n * @param isClassBased `true` if `class` (`false` if `style`)\n * @param bindingIndex Binding index of the binding.\n */\nfunction updateStylingMap(tView, tNode, lView, renderer, oldKeyValueArray, newKeyValueArray, isClassBased, bindingIndex) {\n    if (oldKeyValueArray === NO_CHANGE) {\n        // On first execution the oldKeyValueArray is NO_CHANGE => treat it as empty KeyValueArray.\n        oldKeyValueArray = EMPTY_ARRAY$3;\n    }\n    let oldIndex = 0;\n    let newIndex = 0;\n    let oldKey = 0 < oldKeyValueArray.length ? oldKeyValueArray[0] : null;\n    let newKey = 0 < newKeyValueArray.length ? newKeyValueArray[0] : null;\n    while (oldKey !== null || newKey !== null) {\n        ngDevMode && assertLessThan(oldIndex, 999, 'Are we stuck in infinite loop?');\n        ngDevMode && assertLessThan(newIndex, 999, 'Are we stuck in infinite loop?');\n        const oldValue = oldIndex < oldKeyValueArray.length ? oldKeyValueArray[oldIndex + 1] : undefined;\n        const newValue = newIndex < newKeyValueArray.length ? newKeyValueArray[newIndex + 1] : undefined;\n        let setKey = null;\n        let setValue = undefined;\n        if (oldKey === newKey) {\n            // UPDATE: Keys are equal => new value is overwriting old value.\n            oldIndex += 2;\n            newIndex += 2;\n            if (oldValue !== newValue) {\n                setKey = newKey;\n                setValue = newValue;\n            }\n        }\n        else if (newKey === null || oldKey !== null && oldKey < newKey) {\n            // DELETE: oldKey key is missing or we did not find the oldKey in the newValue\n            // (because the keyValueArray is sorted and `newKey` is found later alphabetically).\n            // `\"background\" < \"color\"` so we need to delete `\"background\"` because it is not found in the\n            // new array.\n            oldIndex += 2;\n            setKey = oldKey;\n        }\n        else {\n            // CREATE: newKey's is earlier alphabetically than oldKey's (or no oldKey) => we have new key.\n            // `\"color\" > \"background\"` so we need to add `color` because it is in new array but not in\n            // old array.\n            ngDevMode && assertDefined(newKey, 'Expecting to have a valid key');\n            newIndex += 2;\n            setKey = newKey;\n            setValue = newValue;\n        }\n        if (setKey !== null) {\n            updateStyling(tView, tNode, lView, renderer, setKey, setValue, isClassBased, bindingIndex);\n        }\n        oldKey = oldIndex < oldKeyValueArray.length ? oldKeyValueArray[oldIndex] : null;\n        newKey = newIndex < newKeyValueArray.length ? newKeyValueArray[newIndex] : null;\n    }\n}\n/**\n * Update a simple (property name) styling.\n *\n * This function takes `prop` and updates the DOM to that value. The function takes the binding\n * value as well as binding priority into consideration to determine which value should be written\n * to DOM. (For example it may be determined that there is a higher priority overwrite which blocks\n * the DOM write, or if the value goes to `undefined` a lower priority overwrite may be consulted.)\n *\n * @param tView Associated `TView.data` contains the linked list of binding priorities.\n * @param tNode `TNode` where the binding is located.\n * @param lView `LView` contains the values associated with other styling binding at this `TNode`.\n * @param renderer Renderer to use if any updates.\n * @param prop Either style property name or a class name.\n * @param value Either style value for `prop` or `true`/`false` if `prop` is class.\n * @param isClassBased `true` if `class` (`false` if `style`)\n * @param bindingIndex Binding index of the binding.\n */\nfunction updateStyling(tView, tNode, lView, renderer, prop, value, isClassBased, bindingIndex) {\n    if (tNode.type !== 3 /* Element */) {\n        // It is possible to have styling on non-elements (such as ng-container).\n        // This is rare, but it does happen. In such a case, just ignore the binding.\n        return;\n    }\n    const tData = tView.data;\n    const tRange = tData[bindingIndex + 1];\n    const higherPriorityValue = getTStylingRangeNextDuplicate(tRange) ?\n        findStylingValue(tData, tNode, lView, prop, getTStylingRangeNext(tRange), isClassBased) :\n        undefined;\n    if (!isStylingValuePresent(higherPriorityValue)) {\n        // We don't have a next duplicate, or we did not find a duplicate value.\n        if (!isStylingValuePresent(value)) {\n            // We should delete current value or restore to lower priority value.\n            if (getTStylingRangePrevDuplicate(tRange)) {\n                // We have a possible prev duplicate, let's retrieve it.\n                value = findStylingValue(tData, null, lView, prop, bindingIndex, isClassBased);\n            }\n        }\n        const rNode = getNativeByIndex(getSelectedIndex(), lView);\n        applyStyling(renderer, isClassBased, rNode, prop, value);\n    }\n}\n/**\n * Search for styling value with higher priority which is overwriting current value, or a\n * value of lower priority to which we should fall back if the value is `undefined`.\n *\n * When value is being applied at a location, related values need to be consulted.\n * - If there is a higher priority binding, we should be using that one instead.\n *   For example `<div  [style]=\"{color:exp1}\" [style.color]=\"exp2\">` change to `exp1`\n *   requires that we check `exp2` to see if it is set to value other than `undefined`.\n * - If there is a lower priority binding and we are changing to `undefined`\n *   For example `<div  [style]=\"{color:exp1}\" [style.color]=\"exp2\">` change to `exp2` to\n *   `undefined` requires that we check `exp1` (and static values) and use that as new value.\n *\n * NOTE: The styling stores two values.\n * 1. The raw value which came from the application is stored at `index + 0` location. (This value\n *    is used for dirty checking).\n * 2. The normalized value is stored at `index + 1`.\n *\n * @param tData `TData` used for traversing the priority.\n * @param tNode `TNode` to use for resolving static styling. Also controls search direction.\n *   - `TNode` search next and quit as soon as `isStylingValuePresent(value)` is true.\n *      If no value found consult `tNode.residualStyle`/`tNode.residualClass` for default value.\n *   - `null` search prev and go all the way to end. Return last value where\n *     `isStylingValuePresent(value)` is true.\n * @param lView `LView` used for retrieving the actual values.\n * @param prop Property which we are interested in.\n * @param index Starting index in the linked list of styling bindings where the search should start.\n * @param isClassBased `true` if `class` (`false` if `style`)\n */\nfunction findStylingValue(tData, tNode, lView, prop, index, isClassBased) {\n    // `TNode` to use for resolving static styling. Also controls search direction.\n    //   - `TNode` search next and quit as soon as `isStylingValuePresent(value)` is true.\n    //      If no value found consult `tNode.residualStyle`/`tNode.residualClass` for default value.\n    //   - `null` search prev and go all the way to end. Return last value where\n    //     `isStylingValuePresent(value)` is true.\n    const isPrevDirection = tNode === null;\n    let value = undefined;\n    while (index > 0) {\n        const rawKey = tData[index];\n        const containsStatics = Array.isArray(rawKey);\n        // Unwrap the key if we contain static values.\n        const key = containsStatics ? rawKey[1] : rawKey;\n        const isStylingMap = key === null;\n        let valueAtLViewIndex = lView[index + 1];\n        if (valueAtLViewIndex === NO_CHANGE) {\n            // In firstUpdatePass the styling instructions create a linked list of styling.\n            // On subsequent passes it is possible for a styling instruction to try to read a binding\n            // which\n            // has not yet executed. In that case we will find `NO_CHANGE` and we should assume that\n            // we have `undefined` (or empty array in case of styling-map instruction) instead. This\n            // allows the resolution to apply the value (which may later be overwritten when the\n            // binding actually executes.)\n            valueAtLViewIndex = isStylingMap ? EMPTY_ARRAY$3 : undefined;\n        }\n        let currentValue = isStylingMap ? keyValueArrayGet(valueAtLViewIndex, prop) :\n            key === prop ? valueAtLViewIndex : undefined;\n        if (containsStatics && !isStylingValuePresent(currentValue)) {\n            currentValue = keyValueArrayGet(rawKey, prop);\n        }\n        if (isStylingValuePresent(currentValue)) {\n            value = currentValue;\n            if (isPrevDirection) {\n                return value;\n            }\n        }\n        const tRange = tData[index + 1];\n        index = isPrevDirection ? getTStylingRangePrev(tRange) : getTStylingRangeNext(tRange);\n    }\n    if (tNode !== null) {\n        // in case where we are going in next direction AND we did not find anything, we need to\n        // consult residual styling\n        let residual = isClassBased ? tNode.residualClasses : tNode.residualStyles;\n        if (residual != null /** OR residual !=== undefined */) {\n            value = keyValueArrayGet(residual, prop);\n        }\n    }\n    return value;\n}\n/**\n * Determines if the binding value should be used (or if the value is 'undefined' and hence priority\n * resolution should be used.)\n *\n * @param value Binding style value.\n */\nfunction isStylingValuePresent(value) {\n    // Currently only `undefined` value is considered non-binding. That is `undefined` says I don't\n    // have an opinion as to what this binding should be and you should consult other bindings by\n    // priority to determine the valid value.\n    // This is extracted into a single function so that we have a single place to control this.\n    return value !== undefined;\n}\n/**\n * Normalizes and/or adds a suffix to the value.\n *\n * If value is `null`/`undefined` no suffix is added\n * @param value\n * @param suffix\n */\nfunction normalizeSuffix(value, suffix) {\n    if (value == null /** || value === undefined */) {\n        // do nothing\n    }\n    else if (typeof suffix === 'string') {\n        value = value + suffix;\n    }\n    else if (typeof value === 'object') {\n        value = stringify(unwrapSafeValue(value));\n    }\n    return value;\n}\n/**\n * Tests if the `TNode` has input shadow.\n *\n * An input shadow is when a directive steals (shadows) the input by using `@Input('style')` or\n * `@Input('class')` as input.\n *\n * @param tNode `TNode` which we would like to see if it has shadow.\n * @param isClassBased `true` if `class` (`false` if `style`)\n */\nfunction hasStylingInputShadow(tNode, isClassBased) {\n    return (tNode.flags & (isClassBased ? 16 /* hasClassInput */ : 32 /* hasStyleInput */)) !== 0;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Create static text node\n *\n * @param index Index of the node in the data array\n * @param value Static string value to write.\n *\n * @codeGenApi\n */\nfunction ɵɵtext(index, value = '') {\n    const lView = getLView();\n    const tView = getTView();\n    const adjustedIndex = index + HEADER_OFFSET;\n    ngDevMode &&\n        assertEqual(getBindingIndex(), tView.bindingStartIndex, 'text nodes should be created before any bindings');\n    ngDevMode && assertIndexInRange(lView, adjustedIndex);\n    const tNode = tView.firstCreatePass ?\n        getOrCreateTNode(tView, lView[T_HOST], index, 3 /* Element */, null, null) :\n        tView.data[adjustedIndex];\n    const textNative = lView[adjustedIndex] = createTextNode(value, lView[RENDERER]);\n    appendChild(tView, lView, textNative, tNode);\n    // Text nodes are self closing.\n    setPreviousOrParentTNode(tNode, false);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n *\n * Update text content with a lone bound value\n *\n * Used when a text node has 1 interpolated value in it, an no additional text\n * surrounds that interpolated value:\n *\n * ```html\n * <div>{{v0}}</div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵtextInterpolate(v0);\n * ```\n * @returns itself, so that it may be chained.\n * @see textInterpolateV\n * @codeGenApi\n */\nfunction ɵɵtextInterpolate(v0) {\n    ɵɵtextInterpolate1('', v0, '');\n    return ɵɵtextInterpolate;\n}\n/**\n *\n * Update text content with single bound value surrounded by other text.\n *\n * Used when a text node has 1 interpolated value in it:\n *\n * ```html\n * <div>prefix{{v0}}suffix</div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵtextInterpolate1('prefix', v0, 'suffix');\n * ```\n * @returns itself, so that it may be chained.\n * @see textInterpolateV\n * @codeGenApi\n */\nfunction ɵɵtextInterpolate1(prefix, v0, suffix) {\n    const lView = getLView();\n    const interpolated = interpolation1(lView, prefix, v0, suffix);\n    if (interpolated !== NO_CHANGE) {\n        textBindingInternal(lView, getSelectedIndex(), interpolated);\n    }\n    return ɵɵtextInterpolate1;\n}\n/**\n *\n * Update text content with 2 bound values surrounded by other text.\n *\n * Used when a text node has 2 interpolated values in it:\n *\n * ```html\n * <div>prefix{{v0}}-{{v1}}suffix</div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵtextInterpolate2('prefix', v0, '-', v1, 'suffix');\n * ```\n * @returns itself, so that it may be chained.\n * @see textInterpolateV\n * @codeGenApi\n */\nfunction ɵɵtextInterpolate2(prefix, v0, i0, v1, suffix) {\n    const lView = getLView();\n    const interpolated = interpolation2(lView, prefix, v0, i0, v1, suffix);\n    if (interpolated !== NO_CHANGE) {\n        textBindingInternal(lView, getSelectedIndex(), interpolated);\n    }\n    return ɵɵtextInterpolate2;\n}\n/**\n *\n * Update text content with 3 bound values surrounded by other text.\n *\n * Used when a text node has 3 interpolated values in it:\n *\n * ```html\n * <div>prefix{{v0}}-{{v1}}-{{v2}}suffix</div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵtextInterpolate3(\n * 'prefix', v0, '-', v1, '-', v2, 'suffix');\n * ```\n * @returns itself, so that it may be chained.\n * @see textInterpolateV\n * @codeGenApi\n */\nfunction ɵɵtextInterpolate3(prefix, v0, i0, v1, i1, v2, suffix) {\n    const lView = getLView();\n    const interpolated = interpolation3(lView, prefix, v0, i0, v1, i1, v2, suffix);\n    if (interpolated !== NO_CHANGE) {\n        textBindingInternal(lView, getSelectedIndex(), interpolated);\n    }\n    return ɵɵtextInterpolate3;\n}\n/**\n *\n * Update text content with 4 bound values surrounded by other text.\n *\n * Used when a text node has 4 interpolated values in it:\n *\n * ```html\n * <div>prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}suffix</div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵtextInterpolate4(\n * 'prefix', v0, '-', v1, '-', v2, '-', v3, 'suffix');\n * ```\n * @returns itself, so that it may be chained.\n * @see ɵɵtextInterpolateV\n * @codeGenApi\n */\nfunction ɵɵtextInterpolate4(prefix, v0, i0, v1, i1, v2, i2, v3, suffix) {\n    const lView = getLView();\n    const interpolated = interpolation4(lView, prefix, v0, i0, v1, i1, v2, i2, v3, suffix);\n    if (interpolated !== NO_CHANGE) {\n        textBindingInternal(lView, getSelectedIndex(), interpolated);\n    }\n    return ɵɵtextInterpolate4;\n}\n/**\n *\n * Update text content with 5 bound values surrounded by other text.\n *\n * Used when a text node has 5 interpolated values in it:\n *\n * ```html\n * <div>prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}suffix</div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵtextInterpolate5(\n * 'prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, 'suffix');\n * ```\n * @returns itself, so that it may be chained.\n * @see textInterpolateV\n * @codeGenApi\n */\nfunction ɵɵtextInterpolate5(prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, suffix) {\n    const lView = getLView();\n    const interpolated = interpolation5(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, suffix);\n    if (interpolated !== NO_CHANGE) {\n        textBindingInternal(lView, getSelectedIndex(), interpolated);\n    }\n    return ɵɵtextInterpolate5;\n}\n/**\n *\n * Update text content with 6 bound values surrounded by other text.\n *\n * Used when a text node has 6 interpolated values in it:\n *\n * ```html\n * <div>prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}-{{v5}}suffix</div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵtextInterpolate6(\n *    'prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, '-', v5, 'suffix');\n * ```\n *\n * @param i4 Static value used for concatenation only.\n * @param v5 Value checked for change. @returns itself, so that it may be chained.\n * @see textInterpolateV\n * @codeGenApi\n */\nfunction ɵɵtextInterpolate6(prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, suffix) {\n    const lView = getLView();\n    const interpolated = interpolation6(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, suffix);\n    if (interpolated !== NO_CHANGE) {\n        textBindingInternal(lView, getSelectedIndex(), interpolated);\n    }\n    return ɵɵtextInterpolate6;\n}\n/**\n *\n * Update text content with 7 bound values surrounded by other text.\n *\n * Used when a text node has 7 interpolated values in it:\n *\n * ```html\n * <div>prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}-{{v5}}-{{v6}}suffix</div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵtextInterpolate7(\n *    'prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, '-', v5, '-', v6, 'suffix');\n * ```\n * @returns itself, so that it may be chained.\n * @see textInterpolateV\n * @codeGenApi\n */\nfunction ɵɵtextInterpolate7(prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, suffix) {\n    const lView = getLView();\n    const interpolated = interpolation7(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, suffix);\n    if (interpolated !== NO_CHANGE) {\n        textBindingInternal(lView, getSelectedIndex(), interpolated);\n    }\n    return ɵɵtextInterpolate7;\n}\n/**\n *\n * Update text content with 8 bound values surrounded by other text.\n *\n * Used when a text node has 8 interpolated values in it:\n *\n * ```html\n * <div>prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}-{{v5}}-{{v6}}-{{v7}}suffix</div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵtextInterpolate8(\n *  'prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, '-', v5, '-', v6, '-', v7, 'suffix');\n * ```\n * @returns itself, so that it may be chained.\n * @see textInterpolateV\n * @codeGenApi\n */\nfunction ɵɵtextInterpolate8(prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, i6, v7, suffix) {\n    const lView = getLView();\n    const interpolated = interpolation8(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, i6, v7, suffix);\n    if (interpolated !== NO_CHANGE) {\n        textBindingInternal(lView, getSelectedIndex(), interpolated);\n    }\n    return ɵɵtextInterpolate8;\n}\n/**\n * Update text content with 9 or more bound values other surrounded by text.\n *\n * Used when the number of interpolated values exceeds 8.\n *\n * ```html\n * <div>prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}-{{v5}}-{{v6}}-{{v7}}-{{v8}}-{{v9}}suffix</div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵtextInterpolateV(\n *  ['prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, '-', v5, '-', v6, '-', v7, '-', v9,\n *  'suffix']);\n * ```\n *.\n * @param values The collection of values and the strings in between those values, beginning with\n * a string prefix and ending with a string suffix.\n * (e.g. `['prefix', value0, '-', value1, '-', value2, ..., value99, 'suffix']`)\n *\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵtextInterpolateV(values) {\n    const lView = getLView();\n    const interpolated = interpolationV(lView, values);\n    if (interpolated !== NO_CHANGE) {\n        textBindingInternal(lView, getSelectedIndex(), interpolated);\n    }\n    return ɵɵtextInterpolateV;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n *\n * Update an interpolated class on an element with single bound value surrounded by text.\n *\n * Used when the value passed to a property has 1 interpolated value in it:\n *\n * ```html\n * <div class=\"prefix{{v0}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵclassMapInterpolate1('prefix', v0, 'suffix');\n * ```\n *\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @codeGenApi\n */\nfunction ɵɵclassMapInterpolate1(prefix, v0, suffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation1(lView, prefix, v0, suffix);\n    checkStylingMap(keyValueArraySet, classStringParser, interpolatedValue, true);\n}\n/**\n *\n * Update an interpolated class on an element with 2 bound values surrounded by text.\n *\n * Used when the value passed to a property has 2 interpolated values in it:\n *\n * ```html\n * <div class=\"prefix{{v0}}-{{v1}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵclassMapInterpolate2('prefix', v0, '-', v1, 'suffix');\n * ```\n *\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @codeGenApi\n */\nfunction ɵɵclassMapInterpolate2(prefix, v0, i0, v1, suffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation2(lView, prefix, v0, i0, v1, suffix);\n    checkStylingMap(keyValueArraySet, classStringParser, interpolatedValue, true);\n}\n/**\n *\n * Update an interpolated class on an element with 3 bound values surrounded by text.\n *\n * Used when the value passed to a property has 3 interpolated values in it:\n *\n * ```html\n * <div class=\"prefix{{v0}}-{{v1}}-{{v2}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵclassMapInterpolate3(\n * 'prefix', v0, '-', v1, '-', v2, 'suffix');\n * ```\n *\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @codeGenApi\n */\nfunction ɵɵclassMapInterpolate3(prefix, v0, i0, v1, i1, v2, suffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation3(lView, prefix, v0, i0, v1, i1, v2, suffix);\n    checkStylingMap(keyValueArraySet, classStringParser, interpolatedValue, true);\n}\n/**\n *\n * Update an interpolated class on an element with 4 bound values surrounded by text.\n *\n * Used when the value passed to a property has 4 interpolated values in it:\n *\n * ```html\n * <div class=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵclassMapInterpolate4(\n * 'prefix', v0, '-', v1, '-', v2, '-', v3, 'suffix');\n * ```\n *\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @codeGenApi\n */\nfunction ɵɵclassMapInterpolate4(prefix, v0, i0, v1, i1, v2, i2, v3, suffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation4(lView, prefix, v0, i0, v1, i1, v2, i2, v3, suffix);\n    checkStylingMap(keyValueArraySet, classStringParser, interpolatedValue, true);\n}\n/**\n *\n * Update an interpolated class on an element with 5 bound values surrounded by text.\n *\n * Used when the value passed to a property has 5 interpolated values in it:\n *\n * ```html\n * <div class=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵclassMapInterpolate5(\n * 'prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, 'suffix');\n * ```\n *\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param i3 Static value used for concatenation only.\n * @param v4 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @codeGenApi\n */\nfunction ɵɵclassMapInterpolate5(prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, suffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation5(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, suffix);\n    checkStylingMap(keyValueArraySet, classStringParser, interpolatedValue, true);\n}\n/**\n *\n * Update an interpolated class on an element with 6 bound values surrounded by text.\n *\n * Used when the value passed to a property has 6 interpolated values in it:\n *\n * ```html\n * <div class=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}-{{v5}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵclassMapInterpolate6(\n *    'prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, '-', v5, 'suffix');\n * ```\n *\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param i3 Static value used for concatenation only.\n * @param v4 Value checked for change.\n * @param i4 Static value used for concatenation only.\n * @param v5 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @codeGenApi\n */\nfunction ɵɵclassMapInterpolate6(prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, suffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation6(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, suffix);\n    checkStylingMap(keyValueArraySet, classStringParser, interpolatedValue, true);\n}\n/**\n *\n * Update an interpolated class on an element with 7 bound values surrounded by text.\n *\n * Used when the value passed to a property has 7 interpolated values in it:\n *\n * ```html\n * <div class=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}-{{v5}}-{{v6}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵclassMapInterpolate7(\n *    'prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, '-', v5, '-', v6, 'suffix');\n * ```\n *\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param i3 Static value used for concatenation only.\n * @param v4 Value checked for change.\n * @param i4 Static value used for concatenation only.\n * @param v5 Value checked for change.\n * @param i5 Static value used for concatenation only.\n * @param v6 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @codeGenApi\n */\nfunction ɵɵclassMapInterpolate7(prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, suffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation7(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, suffix);\n    checkStylingMap(keyValueArraySet, classStringParser, interpolatedValue, true);\n}\n/**\n *\n * Update an interpolated class on an element with 8 bound values surrounded by text.\n *\n * Used when the value passed to a property has 8 interpolated values in it:\n *\n * ```html\n * <div class=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}-{{v5}}-{{v6}}-{{v7}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵclassMapInterpolate8(\n *  'prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, '-', v5, '-', v6, '-', v7, 'suffix');\n * ```\n *\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param i3 Static value used for concatenation only.\n * @param v4 Value checked for change.\n * @param i4 Static value used for concatenation only.\n * @param v5 Value checked for change.\n * @param i5 Static value used for concatenation only.\n * @param v6 Value checked for change.\n * @param i6 Static value used for concatenation only.\n * @param v7 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @codeGenApi\n */\nfunction ɵɵclassMapInterpolate8(prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, i6, v7, suffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation8(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, i6, v7, suffix);\n    checkStylingMap(keyValueArraySet, classStringParser, interpolatedValue, true);\n}\n/**\n * Update an interpolated class on an element with 9 or more bound values surrounded by text.\n *\n * Used when the number of interpolated values exceeds 8.\n *\n * ```html\n * <div\n *  class=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}-{{v5}}-{{v6}}-{{v7}}-{{v8}}-{{v9}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵclassMapInterpolateV(\n *  ['prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, '-', v5, '-', v6, '-', v7, '-', v9,\n *  'suffix']);\n * ```\n *.\n * @param values The collection of values and the strings in-between those values, beginning with\n * a string prefix and ending with a string suffix.\n * (e.g. `['prefix', value0, '-', value1, '-', value2, ..., value99, 'suffix']`)\n * @codeGenApi\n */\nfunction ɵɵclassMapInterpolateV(values) {\n    const lView = getLView();\n    const interpolatedValue = interpolationV(lView, values);\n    checkStylingMap(keyValueArraySet, classStringParser, interpolatedValue, true);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n *\n * Update an interpolated style on an element with single bound value surrounded by text.\n *\n * Used when the value passed to a property has 1 interpolated value in it:\n *\n * ```html\n * <div style=\"key: {{v0}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵstyleMapInterpolate1('key: ', v0, 'suffix');\n * ```\n *\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @codeGenApi\n */\nfunction ɵɵstyleMapInterpolate1(prefix, v0, suffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation1(lView, prefix, v0, suffix);\n    ɵɵstyleMap(interpolatedValue);\n}\n/**\n *\n * Update an interpolated style on an element with 2 bound values surrounded by text.\n *\n * Used when the value passed to a property has 2 interpolated values in it:\n *\n * ```html\n * <div style=\"key: {{v0}}; key1: {{v1}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵstyleMapInterpolate2('key: ', v0, '; key1: ', v1, 'suffix');\n * ```\n *\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @codeGenApi\n */\nfunction ɵɵstyleMapInterpolate2(prefix, v0, i0, v1, suffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation2(lView, prefix, v0, i0, v1, suffix);\n    ɵɵstyleMap(interpolatedValue);\n}\n/**\n *\n * Update an interpolated style on an element with 3 bound values surrounded by text.\n *\n * Used when the value passed to a property has 3 interpolated values in it:\n *\n * ```html\n * <div style=\"key: {{v0}}; key2: {{v1}}; key2: {{v2}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵstyleMapInterpolate3(\n *     'key: ', v0, '; key1: ', v1, '; key2: ', v2, 'suffix');\n * ```\n *\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @codeGenApi\n */\nfunction ɵɵstyleMapInterpolate3(prefix, v0, i0, v1, i1, v2, suffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation3(lView, prefix, v0, i0, v1, i1, v2, suffix);\n    ɵɵstyleMap(interpolatedValue);\n}\n/**\n *\n * Update an interpolated style on an element with 4 bound values surrounded by text.\n *\n * Used when the value passed to a property has 4 interpolated values in it:\n *\n * ```html\n * <div style=\"key: {{v0}}; key1: {{v1}}; key2: {{v2}}; key3: {{v3}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵstyleMapInterpolate4(\n *     'key: ', v0, '; key1: ', v1, '; key2: ', v2, '; key3: ', v3, 'suffix');\n * ```\n *\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @codeGenApi\n */\nfunction ɵɵstyleMapInterpolate4(prefix, v0, i0, v1, i1, v2, i2, v3, suffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation4(lView, prefix, v0, i0, v1, i1, v2, i2, v3, suffix);\n    ɵɵstyleMap(interpolatedValue);\n}\n/**\n *\n * Update an interpolated style on an element with 5 bound values surrounded by text.\n *\n * Used when the value passed to a property has 5 interpolated values in it:\n *\n * ```html\n * <div style=\"key: {{v0}}; key1: {{v1}}; key2: {{v2}}; key3: {{v3}}; key4: {{v4}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵstyleMapInterpolate5(\n *     'key: ', v0, '; key1: ', v1, '; key2: ', v2, '; key3: ', v3, '; key4: ', v4, 'suffix');\n * ```\n *\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param i3 Static value used for concatenation only.\n * @param v4 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @codeGenApi\n */\nfunction ɵɵstyleMapInterpolate5(prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, suffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation5(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, suffix);\n    ɵɵstyleMap(interpolatedValue);\n}\n/**\n *\n * Update an interpolated style on an element with 6 bound values surrounded by text.\n *\n * Used when the value passed to a property has 6 interpolated values in it:\n *\n * ```html\n * <div style=\"key: {{v0}}; key1: {{v1}}; key2: {{v2}}; key3: {{v3}}; key4: {{v4}};\n *             key5: {{v5}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵstyleMapInterpolate6(\n *    'key: ', v0, '; key1: ', v1, '; key2: ', v2, '; key3: ', v3, '; key4: ', v4, '; key5: ', v5,\n *    'suffix');\n * ```\n *\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param i3 Static value used for concatenation only.\n * @param v4 Value checked for change.\n * @param i4 Static value used for concatenation only.\n * @param v5 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @codeGenApi\n */\nfunction ɵɵstyleMapInterpolate6(prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, suffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation6(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, suffix);\n    ɵɵstyleMap(interpolatedValue);\n}\n/**\n *\n * Update an interpolated style on an element with 7 bound values surrounded by text.\n *\n * Used when the value passed to a property has 7 interpolated values in it:\n *\n * ```html\n * <div style=\"key: {{v0}}; key1: {{v1}}; key2: {{v2}}; key3: {{v3}}; key4: {{v4}}; key5: {{v5}};\n *             key6: {{v6}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵstyleMapInterpolate7(\n *    'key: ', v0, '; key1: ', v1, '; key2: ', v2, '; key3: ', v3, '; key4: ', v4, '; key5: ', v5,\n *    '; key6: ', v6, 'suffix');\n * ```\n *\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param i3 Static value used for concatenation only.\n * @param v4 Value checked for change.\n * @param i4 Static value used for concatenation only.\n * @param v5 Value checked for change.\n * @param i5 Static value used for concatenation only.\n * @param v6 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @codeGenApi\n */\nfunction ɵɵstyleMapInterpolate7(prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, suffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation7(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, suffix);\n    ɵɵstyleMap(interpolatedValue);\n}\n/**\n *\n * Update an interpolated style on an element with 8 bound values surrounded by text.\n *\n * Used when the value passed to a property has 8 interpolated values in it:\n *\n * ```html\n * <div style=\"key: {{v0}}; key1: {{v1}}; key2: {{v2}}; key3: {{v3}}; key4: {{v4}}; key5: {{v5}};\n *             key6: {{v6}}; key7: {{v7}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵstyleMapInterpolate8(\n *    'key: ', v0, '; key1: ', v1, '; key2: ', v2, '; key3: ', v3, '; key4: ', v4, '; key5: ', v5,\n *    '; key6: ', v6, '; key7: ', v7, 'suffix');\n * ```\n *\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param i3 Static value used for concatenation only.\n * @param v4 Value checked for change.\n * @param i4 Static value used for concatenation only.\n * @param v5 Value checked for change.\n * @param i5 Static value used for concatenation only.\n * @param v6 Value checked for change.\n * @param i6 Static value used for concatenation only.\n * @param v7 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @codeGenApi\n */\nfunction ɵɵstyleMapInterpolate8(prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, i6, v7, suffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation8(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, i6, v7, suffix);\n    ɵɵstyleMap(interpolatedValue);\n}\n/**\n * Update an interpolated style on an element with 9 or more bound values surrounded by text.\n *\n * Used when the number of interpolated values exceeds 8.\n *\n * ```html\n * <div\n *  class=\"key: {{v0}}; key1: {{v1}}; key2: {{v2}}; key3: {{v3}}; key4: {{v4}}; key5: {{v5}};\n *         key6: {{v6}}; key7: {{v7}}; key8: {{v8}}; key9: {{v9}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵstyleMapInterpolateV(\n *    ['key: ', v0, '; key1: ', v1, '; key2: ', v2, '; key3: ', v3, '; key4: ', v4, '; key5: ', v5,\n *     '; key6: ', v6, '; key7: ', v7, '; key8: ', v8, '; key9: ', v9, 'suffix']);\n * ```\n *.\n * @param values The collection of values and the strings in-between those values, beginning with\n * a string prefix and ending with a string suffix.\n * (e.g. `['prefix', value0, '; key2: ', value1, '; key2: ', value2, ..., value99, 'suffix']`)\n * @codeGenApi\n */\nfunction ɵɵstyleMapInterpolateV(values) {\n    const lView = getLView();\n    const interpolatedValue = interpolationV(lView, values);\n    ɵɵstyleMap(interpolatedValue);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n *\n * Update an interpolated style property on an element with single bound value surrounded by text.\n *\n * Used when the value passed to a property has 1 interpolated value in it:\n *\n * ```html\n * <div style.color=\"prefix{{v0}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵstylePropInterpolate1(0, 'prefix', v0, 'suffix');\n * ```\n *\n * @param styleIndex Index of style to update. This index value refers to the\n *        index of the style in the style bindings array that was passed into\n *        `styling`.\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param valueSuffix Optional suffix. Used with scalar values to add unit such as `px`.\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵstylePropInterpolate1(prop, prefix, v0, suffix, valueSuffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation1(lView, prefix, v0, suffix);\n    checkStylingProperty(prop, interpolatedValue, valueSuffix, false);\n    return ɵɵstylePropInterpolate1;\n}\n/**\n *\n * Update an interpolated style property on an element with 2 bound values surrounded by text.\n *\n * Used when the value passed to a property has 2 interpolated values in it:\n *\n * ```html\n * <div style.color=\"prefix{{v0}}-{{v1}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵstylePropInterpolate2(0, 'prefix', v0, '-', v1, 'suffix');\n * ```\n *\n * @param styleIndex Index of style to update. This index value refers to the\n *        index of the style in the style bindings array that was passed into\n *        `styling`.\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param valueSuffix Optional suffix. Used with scalar values to add unit such as `px`.\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵstylePropInterpolate2(prop, prefix, v0, i0, v1, suffix, valueSuffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation2(lView, prefix, v0, i0, v1, suffix);\n    checkStylingProperty(prop, interpolatedValue, valueSuffix, false);\n    return ɵɵstylePropInterpolate2;\n}\n/**\n *\n * Update an interpolated style property on an element with 3 bound values surrounded by text.\n *\n * Used when the value passed to a property has 3 interpolated values in it:\n *\n * ```html\n * <div style.color=\"prefix{{v0}}-{{v1}}-{{v2}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵstylePropInterpolate3(0, 'prefix', v0, '-', v1, '-', v2, 'suffix');\n * ```\n *\n * @param styleIndex Index of style to update. This index value refers to the\n *        index of the style in the style bindings array that was passed into\n *        `styling`.\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param valueSuffix Optional suffix. Used with scalar values to add unit such as `px`.\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵstylePropInterpolate3(prop, prefix, v0, i0, v1, i1, v2, suffix, valueSuffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation3(lView, prefix, v0, i0, v1, i1, v2, suffix);\n    checkStylingProperty(prop, interpolatedValue, valueSuffix, false);\n    return ɵɵstylePropInterpolate3;\n}\n/**\n *\n * Update an interpolated style property on an element with 4 bound values surrounded by text.\n *\n * Used when the value passed to a property has 4 interpolated values in it:\n *\n * ```html\n * <div style.color=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵstylePropInterpolate4(0, 'prefix', v0, '-', v1, '-', v2, '-', v3, 'suffix');\n * ```\n *\n * @param styleIndex Index of style to update. This index value refers to the\n *        index of the style in the style bindings array that was passed into\n *        `styling`.\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param valueSuffix Optional suffix. Used with scalar values to add unit such as `px`.\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵstylePropInterpolate4(prop, prefix, v0, i0, v1, i1, v2, i2, v3, suffix, valueSuffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation4(lView, prefix, v0, i0, v1, i1, v2, i2, v3, suffix);\n    checkStylingProperty(prop, interpolatedValue, valueSuffix, false);\n    return ɵɵstylePropInterpolate4;\n}\n/**\n *\n * Update an interpolated style property on an element with 5 bound values surrounded by text.\n *\n * Used when the value passed to a property has 5 interpolated values in it:\n *\n * ```html\n * <div style.color=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵstylePropInterpolate5(0, 'prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, 'suffix');\n * ```\n *\n * @param styleIndex Index of style to update. This index value refers to the\n *        index of the style in the style bindings array that was passed into\n *        `styling`.\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param i3 Static value used for concatenation only.\n * @param v4 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param valueSuffix Optional suffix. Used with scalar values to add unit such as `px`.\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵstylePropInterpolate5(prop, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, suffix, valueSuffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation5(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, suffix);\n    checkStylingProperty(prop, interpolatedValue, valueSuffix, false);\n    return ɵɵstylePropInterpolate5;\n}\n/**\n *\n * Update an interpolated style property on an element with 6 bound values surrounded by text.\n *\n * Used when the value passed to a property has 6 interpolated values in it:\n *\n * ```html\n * <div style.color=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}-{{v5}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵstylePropInterpolate6(0, 'prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, '-', v5, 'suffix');\n * ```\n *\n * @param styleIndex Index of style to update. This index value refers to the\n *        index of the style in the style bindings array that was passed into\n *        `styling`.\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param i3 Static value used for concatenation only.\n * @param v4 Value checked for change.\n * @param i4 Static value used for concatenation only.\n * @param v5 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param valueSuffix Optional suffix. Used with scalar values to add unit such as `px`.\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵstylePropInterpolate6(prop, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, suffix, valueSuffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation6(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, suffix);\n    checkStylingProperty(prop, interpolatedValue, valueSuffix, false);\n    return ɵɵstylePropInterpolate6;\n}\n/**\n *\n * Update an interpolated style property on an element with 7 bound values surrounded by text.\n *\n * Used when the value passed to a property has 7 interpolated values in it:\n *\n * ```html\n * <div style.color=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}-{{v5}}-{{v6}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵstylePropInterpolate7(\n *    0, 'prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, '-', v5, '-', v6, 'suffix');\n * ```\n *\n * @param styleIndex Index of style to update. This index value refers to the\n *        index of the style in the style bindings array that was passed into\n *        `styling`.\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param i3 Static value used for concatenation only.\n * @param v4 Value checked for change.\n * @param i4 Static value used for concatenation only.\n * @param v5 Value checked for change.\n * @param i5 Static value used for concatenation only.\n * @param v6 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param valueSuffix Optional suffix. Used with scalar values to add unit such as `px`.\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵstylePropInterpolate7(prop, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, suffix, valueSuffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation7(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, suffix);\n    checkStylingProperty(prop, interpolatedValue, valueSuffix, false);\n    return ɵɵstylePropInterpolate7;\n}\n/**\n *\n * Update an interpolated style property on an element with 8 bound values surrounded by text.\n *\n * Used when the value passed to a property has 8 interpolated values in it:\n *\n * ```html\n * <div style.color=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}-{{v5}}-{{v6}}-{{v7}}suffix\"></div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵstylePropInterpolate8(0, 'prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, '-', v5, '-', v6,\n * '-', v7, 'suffix');\n * ```\n *\n * @param styleIndex Index of style to update. This index value refers to the\n *        index of the style in the style bindings array that was passed into\n *        `styling`.\n * @param prefix Static value used for concatenation only.\n * @param v0 Value checked for change.\n * @param i0 Static value used for concatenation only.\n * @param v1 Value checked for change.\n * @param i1 Static value used for concatenation only.\n * @param v2 Value checked for change.\n * @param i2 Static value used for concatenation only.\n * @param v3 Value checked for change.\n * @param i3 Static value used for concatenation only.\n * @param v4 Value checked for change.\n * @param i4 Static value used for concatenation only.\n * @param v5 Value checked for change.\n * @param i5 Static value used for concatenation only.\n * @param v6 Value checked for change.\n * @param i6 Static value used for concatenation only.\n * @param v7 Value checked for change.\n * @param suffix Static value used for concatenation only.\n * @param valueSuffix Optional suffix. Used with scalar values to add unit such as `px`.\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵstylePropInterpolate8(prop, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, i6, v7, suffix, valueSuffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolation8(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, i6, v7, suffix);\n    checkStylingProperty(prop, interpolatedValue, valueSuffix, false);\n    return ɵɵstylePropInterpolate8;\n}\n/**\n * Update an interpolated style property on an element with 9 or more bound values surrounded by\n * text.\n *\n * Used when the number of interpolated values exceeds 8.\n *\n * ```html\n * <div\n *  style.color=\"prefix{{v0}}-{{v1}}-{{v2}}-{{v3}}-{{v4}}-{{v5}}-{{v6}}-{{v7}}-{{v8}}-{{v9}}suffix\">\n * </div>\n * ```\n *\n * Its compiled representation is:\n *\n * ```ts\n * ɵɵstylePropInterpolateV(\n *  0, ['prefix', v0, '-', v1, '-', v2, '-', v3, '-', v4, '-', v5, '-', v6, '-', v7, '-', v9,\n *  'suffix']);\n * ```\n *\n * @param styleIndex Index of style to update. This index value refers to the\n *        index of the style in the style bindings array that was passed into\n *        `styling`..\n * @param values The collection of values and the strings in-between those values, beginning with\n * a string prefix and ending with a string suffix.\n * (e.g. `['prefix', value0, '-', value1, '-', value2, ..., value99, 'suffix']`)\n * @param valueSuffix Optional suffix. Used with scalar values to add unit such as `px`.\n * @returns itself, so that it may be chained.\n * @codeGenApi\n */\nfunction ɵɵstylePropInterpolateV(prop, values, valueSuffix) {\n    const lView = getLView();\n    const interpolatedValue = interpolationV(lView, values);\n    checkStylingProperty(prop, interpolatedValue, valueSuffix, false);\n    return ɵɵstylePropInterpolateV;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Update a property on a host element. Only applies to native node properties, not inputs.\n *\n * Operates on the element selected by index via the {@link select} instruction.\n *\n * @param propName Name of property. Because it is going to DOM, this is not subject to\n *        renaming as part of minification.\n * @param value New value to write.\n * @param sanitizer An optional function used to sanitize the value.\n * @returns This function returns itself so that it may be chained\n * (e.g. `property('name', ctx.name)('title', ctx.title)`)\n *\n * @codeGenApi\n */\nfunction ɵɵhostProperty(propName, value, sanitizer) {\n    const lView = getLView();\n    const bindingIndex = nextBindingIndex();\n    if (bindingUpdated(lView, bindingIndex, value)) {\n        const tView = getTView();\n        const tNode = getSelectedTNode();\n        elementPropertyInternal(tView, tNode, lView, propName, value, lView[RENDERER], sanitizer, true);\n        ngDevMode && storePropertyBindingMetadata(tView.data, tNode, propName, bindingIndex);\n    }\n    return ɵɵhostProperty;\n}\n/**\n * Updates a synthetic host binding (e.g. `[@foo]`) on a component or directive.\n *\n * This instruction is for compatibility purposes and is designed to ensure that a\n * synthetic host binding (e.g. `@HostBinding('@foo')`) properly gets rendered in\n * the component's renderer. Normally all host bindings are evaluated with the parent\n * component's renderer, but, in the case of animation @triggers, they need to be\n * evaluated with the sub component's renderer (because that's where the animation\n * triggers are defined).\n *\n * Do not use this instruction as a replacement for `elementProperty`. This instruction\n * only exists to ensure compatibility with the ViewEngine's host binding behavior.\n *\n * @param index The index of the element to update in the data array\n * @param propName Name of property. Because it is going to DOM, this is not subject to\n *        renaming as part of minification.\n * @param value New value to write.\n * @param sanitizer An optional function used to sanitize the value.\n *\n * @codeGenApi\n */\nfunction ɵɵsyntheticHostProperty(propName, value, sanitizer) {\n    const lView = getLView();\n    const bindingIndex = nextBindingIndex();\n    if (bindingUpdated(lView, bindingIndex, value)) {\n        const tView = getTView();\n        const tNode = getSelectedTNode();\n        const currentDef = getCurrentDirectiveDef(tView.data);\n        const renderer = loadComponentRenderer(currentDef, tNode, lView);\n        elementPropertyInternal(tView, tNode, lView, propName, value, renderer, sanitizer, true);\n        ngDevMode && storePropertyBindingMetadata(tView.data, tNode, propName, bindingIndex);\n    }\n    return ɵɵsyntheticHostProperty;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Resolves the providers which are defined in the DirectiveDef.\n *\n * When inserting the tokens and the factories in their respective arrays, we can assume that\n * this method is called first for the component (if any), and then for other directives on the same\n * node.\n * As a consequence,the providers are always processed in that order:\n * 1) The view providers of the component\n * 2) The providers of the component\n * 3) The providers of the other directives\n * This matches the structure of the injectables arrays of a view (for each node).\n * So the tokens and the factories can be pushed at the end of the arrays, except\n * in one case for multi providers.\n *\n * @param def the directive definition\n * @param providers: Array of `providers`.\n * @param viewProviders: Array of `viewProviders`.\n */\nfunction providersResolver(def, providers, viewProviders) {\n    const tView = getTView();\n    if (tView.firstCreatePass) {\n        const isComponent = isComponentDef(def);\n        // The list of view providers is processed first, and the flags are updated\n        resolveProvider$1(viewProviders, tView.data, tView.blueprint, isComponent, true);\n        // Then, the list of providers is processed, and the flags are updated\n        resolveProvider$1(providers, tView.data, tView.blueprint, isComponent, false);\n    }\n}\n/**\n * Resolves a provider and publishes it to the DI system.\n */\nfunction resolveProvider$1(provider, tInjectables, lInjectablesBlueprint, isComponent, isViewProvider) {\n    provider = resolveForwardRef(provider);\n    if (Array.isArray(provider)) {\n        // Recursively call `resolveProvider`\n        // Recursion is OK in this case because this code will not be in hot-path once we implement\n        // cloning of the initial state.\n        for (let i = 0; i < provider.length; i++) {\n            resolveProvider$1(provider[i], tInjectables, lInjectablesBlueprint, isComponent, isViewProvider);\n        }\n    }\n    else {\n        const tView = getTView();\n        const lView = getLView();\n        let token = isTypeProvider(provider) ? provider : resolveForwardRef(provider.provide);\n        let providerFactory = providerToFactory(provider);\n        const tNode = getPreviousOrParentTNode();\n        const beginIndex = tNode.providerIndexes & 1048575 /* ProvidersStartIndexMask */;\n        const endIndex = tNode.directiveStart;\n        const cptViewProvidersCount = tNode.providerIndexes >> 20 /* CptViewProvidersCountShift */;\n        if (isTypeProvider(provider) || !provider.multi) {\n            // Single provider case: the factory is created and pushed immediately\n            const factory = new NodeInjectorFactory(providerFactory, isViewProvider, ɵɵdirectiveInject);\n            const existingFactoryIndex = indexOf(token, tInjectables, isViewProvider ? beginIndex : beginIndex + cptViewProvidersCount, endIndex);\n            if (existingFactoryIndex === -1) {\n                diPublicInInjector(getOrCreateNodeInjectorForNode(tNode, lView), tView, token);\n                registerDestroyHooksIfSupported(tView, provider, tInjectables.length);\n                tInjectables.push(token);\n                tNode.directiveStart++;\n                tNode.directiveEnd++;\n                if (isViewProvider) {\n                    tNode.providerIndexes += 1048576 /* CptViewProvidersCountShifter */;\n                }\n                lInjectablesBlueprint.push(factory);\n                lView.push(factory);\n            }\n            else {\n                lInjectablesBlueprint[existingFactoryIndex] = factory;\n                lView[existingFactoryIndex] = factory;\n            }\n        }\n        else {\n            // Multi provider case:\n            // We create a multi factory which is going to aggregate all the values.\n            // Since the output of such a factory depends on content or view injection,\n            // we create two of them, which are linked together.\n            //\n            // The first one (for view providers) is always in the first block of the injectables array,\n            // and the second one (for providers) is always in the second block.\n            // This is important because view providers have higher priority. When a multi token\n            // is being looked up, the view providers should be found first.\n            // Note that it is not possible to have a multi factory in the third block (directive block).\n            //\n            // The algorithm to process multi providers is as follows:\n            // 1) If the multi provider comes from the `viewProviders` of the component:\n            //   a) If the special view providers factory doesn't exist, it is created and pushed.\n            //   b) Else, the multi provider is added to the existing multi factory.\n            // 2) If the multi provider comes from the `providers` of the component or of another\n            // directive:\n            //   a) If the multi factory doesn't exist, it is created and provider pushed into it.\n            //      It is also linked to the multi factory for view providers, if it exists.\n            //   b) Else, the multi provider is added to the existing multi factory.\n            const existingProvidersFactoryIndex = indexOf(token, tInjectables, beginIndex + cptViewProvidersCount, endIndex);\n            const existingViewProvidersFactoryIndex = indexOf(token, tInjectables, beginIndex, beginIndex + cptViewProvidersCount);\n            const doesProvidersFactoryExist = existingProvidersFactoryIndex >= 0 &&\n                lInjectablesBlueprint[existingProvidersFactoryIndex];\n            const doesViewProvidersFactoryExist = existingViewProvidersFactoryIndex >= 0 &&\n                lInjectablesBlueprint[existingViewProvidersFactoryIndex];\n            if (isViewProvider && !doesViewProvidersFactoryExist ||\n                !isViewProvider && !doesProvidersFactoryExist) {\n                // Cases 1.a and 2.a\n                diPublicInInjector(getOrCreateNodeInjectorForNode(tNode, lView), tView, token);\n                const factory = multiFactory(isViewProvider ? multiViewProvidersFactoryResolver : multiProvidersFactoryResolver, lInjectablesBlueprint.length, isViewProvider, isComponent, providerFactory);\n                if (!isViewProvider && doesViewProvidersFactoryExist) {\n                    lInjectablesBlueprint[existingViewProvidersFactoryIndex].providerFactory = factory;\n                }\n                registerDestroyHooksIfSupported(tView, provider, tInjectables.length, 0);\n                tInjectables.push(token);\n                tNode.directiveStart++;\n                tNode.directiveEnd++;\n                if (isViewProvider) {\n                    tNode.providerIndexes += 1048576 /* CptViewProvidersCountShifter */;\n                }\n                lInjectablesBlueprint.push(factory);\n                lView.push(factory);\n            }\n            else {\n                // Cases 1.b and 2.b\n                const indexInFactory = multiFactoryAdd(lInjectablesBlueprint[isViewProvider ? existingViewProvidersFactoryIndex :\n                    existingProvidersFactoryIndex], providerFactory, !isViewProvider && isComponent);\n                registerDestroyHooksIfSupported(tView, provider, existingProvidersFactoryIndex > -1 ? existingProvidersFactoryIndex :\n                    existingViewProvidersFactoryIndex, indexInFactory);\n            }\n            if (!isViewProvider && isComponent && doesViewProvidersFactoryExist) {\n                lInjectablesBlueprint[existingViewProvidersFactoryIndex].componentProviders++;\n            }\n        }\n    }\n}\n/**\n * Registers the `ngOnDestroy` hook of a provider, if the provider supports destroy hooks.\n * @param tView `TView` in which to register the hook.\n * @param provider Provider whose hook should be registered.\n * @param contextIndex Index under which to find the context for the hook when it's being invoked.\n * @param indexInFactory Only required for `multi` providers. Index of the provider in the multi\n * provider factory.\n */\nfunction registerDestroyHooksIfSupported(tView, provider, contextIndex, indexInFactory) {\n    const providerIsTypeProvider = isTypeProvider(provider);\n    if (providerIsTypeProvider || isClassProvider(provider)) {\n        const prototype = (provider.useClass || provider).prototype;\n        const ngOnDestroy = prototype.ngOnDestroy;\n        if (ngOnDestroy) {\n            const hooks = tView.destroyHooks || (tView.destroyHooks = []);\n            if (!providerIsTypeProvider && provider.multi) {\n                ngDevMode &&\n                    assertDefined(indexInFactory, 'indexInFactory when registering multi factory destroy hook');\n                const existingCallbacksIndex = hooks.indexOf(contextIndex);\n                if (existingCallbacksIndex === -1) {\n                    hooks.push(contextIndex, [indexInFactory, ngOnDestroy]);\n                }\n                else {\n                    hooks[existingCallbacksIndex + 1].push(indexInFactory, ngOnDestroy);\n                }\n            }\n            else {\n                hooks.push(contextIndex, ngOnDestroy);\n            }\n        }\n    }\n}\n/**\n * Add a factory in a multi factory.\n * @returns Index at which the factory was inserted.\n */\nfunction multiFactoryAdd(multiFactory, factory, isComponentProvider) {\n    if (isComponentProvider) {\n        multiFactory.componentProviders++;\n    }\n    return multiFactory.multi.push(factory) - 1;\n}\n/**\n * Returns the index of item in the array, but only in the begin to end range.\n */\nfunction indexOf(item, arr, begin, end) {\n    for (let i = begin; i < end; i++) {\n        if (arr[i] === item)\n            return i;\n    }\n    return -1;\n}\n/**\n * Use this with `multi` `providers`.\n */\nfunction multiProvidersFactoryResolver(_, tData, lData, tNode) {\n    return multiResolve(this.multi, []);\n}\n/**\n * Use this with `multi` `viewProviders`.\n *\n * This factory knows how to concatenate itself with the existing `multi` `providers`.\n */\nfunction multiViewProvidersFactoryResolver(_, tData, lView, tNode) {\n    const factories = this.multi;\n    let result;\n    if (this.providerFactory) {\n        const componentCount = this.providerFactory.componentProviders;\n        const multiProviders = getNodeInjectable(lView, lView[TVIEW], this.providerFactory.index, tNode);\n        // Copy the section of the array which contains `multi` `providers` from the component\n        result = multiProviders.slice(0, componentCount);\n        // Insert the `viewProvider` instances.\n        multiResolve(factories, result);\n        // Copy the section of the array which contains `multi` `providers` from other directives\n        for (let i = componentCount; i < multiProviders.length; i++) {\n            result.push(multiProviders[i]);\n        }\n    }\n    else {\n        result = [];\n        // Insert the `viewProvider` instances.\n        multiResolve(factories, result);\n    }\n    return result;\n}\n/**\n * Maps an array of factories into an array of values.\n */\nfunction multiResolve(factories, result) {\n    for (let i = 0; i < factories.length; i++) {\n        const factory = factories[i];\n        result.push(factory());\n    }\n    return result;\n}\n/**\n * Creates a multi factory.\n */\nfunction multiFactory(factoryFn, index, isViewProvider, isComponent, f) {\n    const factory = new NodeInjectorFactory(factoryFn, isViewProvider, ɵɵdirectiveInject);\n    factory.multi = [];\n    factory.index = index;\n    factory.componentProviders = 0;\n    multiFactoryAdd(factory, f, isComponent && !isViewProvider);\n    return factory;\n}\n\n/**\n * This feature resolves the providers of a directive (or component),\n * and publish them into the DI system, making it visible to others for injection.\n *\n * For example:\n * ```ts\n * class ComponentWithProviders {\n *   constructor(private greeter: GreeterDE) {}\n *\n *   static ɵcmp = defineComponent({\n *     type: ComponentWithProviders,\n *     selectors: [['component-with-providers']],\n *    factory: () => new ComponentWithProviders(directiveInject(GreeterDE as any)),\n *    decls: 1,\n *    vars: 1,\n *    template: function(fs: RenderFlags, ctx: ComponentWithProviders) {\n *      if (fs & RenderFlags.Create) {\n *        ɵɵtext(0);\n *      }\n *      if (fs & RenderFlags.Update) {\n *        ɵɵtextInterpolate(ctx.greeter.greet());\n *      }\n *    },\n *    features: [ProvidersFeature([GreeterDE])]\n *  });\n * }\n * ```\n *\n * @param definition\n *\n * @codeGenApi\n */\nfunction ɵɵProvidersFeature(providers, viewProviders = []) {\n    return (definition) => {\n        definition.providersResolver =\n            (def, processProvidersFn) => {\n                return providersResolver(def, //\n                processProvidersFn ? processProvidersFn(providers) : providers, //\n                viewProviders);\n            };\n    };\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Represents a component created by a `ComponentFactory`.\n * Provides access to the component instance and related objects,\n * and provides the means of destroying the instance.\n *\n * @publicApi\n */\nclass ComponentRef {\n}\n/**\n * Base class for a factory that can create a component dynamically.\n * Instantiate a factory for a given type of component with `resolveComponentFactory()`.\n * Use the resulting `ComponentFactory.create()` method to create a component of that type.\n *\n * @see [Dynamic Components](guide/dynamic-component-loader)\n *\n * @publicApi\n */\nclass ComponentFactory {\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction noComponentFactoryError(component) {\n    const error = Error(`No component factory found for ${stringify(component)}. Did you add it to @NgModule.entryComponents?`);\n    error[ERROR_COMPONENT] = component;\n    return error;\n}\nconst ERROR_COMPONENT = 'ngComponent';\nfunction getComponent$1(error) {\n    return error[ERROR_COMPONENT];\n}\nclass _NullComponentFactoryResolver {\n    resolveComponentFactory(component) {\n        throw noComponentFactoryError(component);\n    }\n}\n/**\n * A simple registry that maps `Components` to generated `ComponentFactory` classes\n * that can be used to create instances of components.\n * Use to obtain the factory for a given component type,\n * then use the factory's `create()` method to create a component of that type.\n *\n * @see [Dynamic Components](guide/dynamic-component-loader)\n * @publicApi\n */\nclass ComponentFactoryResolver {\n}\nComponentFactoryResolver.NULL = new _NullComponentFactoryResolver();\nclass CodegenComponentFactoryResolver {\n    constructor(factories, _parent, _ngModule) {\n        this._parent = _parent;\n        this._ngModule = _ngModule;\n        this._factories = new Map();\n        for (let i = 0; i < factories.length; i++) {\n            const factory = factories[i];\n            this._factories.set(factory.componentType, factory);\n        }\n    }\n    resolveComponentFactory(component) {\n        let factory = this._factories.get(component);\n        if (!factory && this._parent) {\n            factory = this._parent.resolveComponentFactory(component);\n        }\n        if (!factory) {\n            throw noComponentFactoryError(component);\n        }\n        return new ComponentFactoryBoundToModule(factory, this._ngModule);\n    }\n}\nclass ComponentFactoryBoundToModule extends ComponentFactory {\n    constructor(factory, ngModule) {\n        super();\n        this.factory = factory;\n        this.ngModule = ngModule;\n        this.selector = factory.selector;\n        this.componentType = factory.componentType;\n        this.ngContentSelectors = factory.ngContentSelectors;\n        this.inputs = factory.inputs;\n        this.outputs = factory.outputs;\n    }\n    create(injector, projectableNodes, rootSelectorOrNode, ngModule) {\n        return this.factory.create(injector, projectableNodes, rootSelectorOrNode, ngModule || this.ngModule);\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction noop(...args) {\n    // Do nothing.\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * A wrapper around a native element inside of a View.\n *\n * An `ElementRef` is backed by a render-specific element. In the browser, this is usually a DOM\n * element.\n *\n * @security Permitting direct access to the DOM can make your application more vulnerable to\n * XSS attacks. Carefully review any use of `ElementRef` in your code. For more detail, see the\n * [Security Guide](http://g.co/ng/security).\n *\n * @publicApi\n */\n// Note: We don't expose things like `Injector`, `ViewContainer`, ... here,\n// i.e. users have to ask for what they need. With that, we can build better analysis tools\n// and could do better codegen in the future.\nclass ElementRef {\n    constructor(nativeElement) {\n        this.nativeElement = nativeElement;\n    }\n}\n/**\n * @internal\n * @nocollapse\n */\nElementRef.__NG_ELEMENT_ID__ = () => SWITCH_ELEMENT_REF_FACTORY(ElementRef);\nconst SWITCH_ELEMENT_REF_FACTORY__POST_R3__ = injectElementRef;\nconst SWITCH_ELEMENT_REF_FACTORY__PRE_R3__ = noop;\nconst SWITCH_ELEMENT_REF_FACTORY = SWITCH_ELEMENT_REF_FACTORY__POST_R3__;\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst Renderer2Interceptor = new InjectionToken('Renderer2Interceptor');\n/**\n * Creates and initializes a custom renderer that implements the `Renderer2` base class.\n *\n * @publicApi\n */\nclass RendererFactory2 {\n}\n/**\n * Flags for renderer-specific style modifiers.\n * @publicApi\n */\nvar RendererStyleFlags2;\n(function (RendererStyleFlags2) {\n    // TODO(misko): This needs to be refactored into a separate file so that it can be imported from\n    // `node_manipulation.ts` Currently doing the import cause resolution order to change and fails\n    // the tests. The work around is to have hard coded value in `node_manipulation.ts` for now.\n    /**\n     * Marks a style as important.\n     */\n    RendererStyleFlags2[RendererStyleFlags2[\"Important\"] = 1] = \"Important\";\n    /**\n     * Marks a style as using dash case naming (this-is-dash-case).\n     */\n    RendererStyleFlags2[RendererStyleFlags2[\"DashCase\"] = 2] = \"DashCase\";\n})(RendererStyleFlags2 || (RendererStyleFlags2 = {}));\n/**\n * Extend this base class to implement custom rendering. By default, Angular\n * renders a template into DOM. You can use custom rendering to intercept\n * rendering calls, or to render to something other than DOM.\n *\n * Create your custom renderer using `RendererFactory2`.\n *\n * Use a custom renderer to bypass Angular's templating and\n * make custom UI changes that can't be expressed declaratively.\n * For example if you need to set a property or an attribute whose name is\n * not statically known, use the `setProperty()` or\n * `setAttribute()` method.\n *\n * @publicApi\n */\nclass Renderer2 {\n}\n/**\n * @internal\n * @nocollapse\n */\nRenderer2.__NG_ELEMENT_ID__ = () => SWITCH_RENDERER2_FACTORY();\nconst SWITCH_RENDERER2_FACTORY__POST_R3__ = injectRenderer2;\nconst SWITCH_RENDERER2_FACTORY__PRE_R3__ = noop;\nconst SWITCH_RENDERER2_FACTORY = SWITCH_RENDERER2_FACTORY__POST_R3__;\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Sanitizer is used by the views to sanitize potentially dangerous values.\n *\n * @publicApi\n */\nclass Sanitizer {\n}\n/** @nocollapse */\nSanitizer.ɵprov = ɵɵdefineInjectable({\n    token: Sanitizer,\n    providedIn: 'root',\n    factory: () => null,\n});\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * @description Represents the version of Angular\n *\n * @publicApi\n */\nclass Version {\n    constructor(full) {\n        this.full = full;\n        this.major = full.split('.')[0];\n        this.minor = full.split('.')[1];\n        this.patch = full.split('.').slice(2).join('.');\n    }\n}\n/**\n * @publicApi\n */\nconst VERSION = new Version('10.1.3');\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass DefaultIterableDifferFactory {\n    constructor() { }\n    supports(obj) {\n        return isListLikeIterable(obj);\n    }\n    create(trackByFn) {\n        return new DefaultIterableDiffer(trackByFn);\n    }\n}\nconst trackByIdentity = (index, item) => item;\nconst ɵ0$c = trackByIdentity;\n/**\n * @deprecated v4.0.0 - Should not be part of public API.\n * @publicApi\n */\nclass DefaultIterableDiffer {\n    constructor(trackByFn) {\n        this.length = 0;\n        // Keeps track of the used records at any point in time (during & across `_check()` calls)\n        this._linkedRecords = null;\n        // Keeps track of the removed records at any point in time during `_check()` calls.\n        this._unlinkedRecords = null;\n        this._previousItHead = null;\n        this._itHead = null;\n        this._itTail = null;\n        this._additionsHead = null;\n        this._additionsTail = null;\n        this._movesHead = null;\n        this._movesTail = null;\n        this._removalsHead = null;\n        this._removalsTail = null;\n        // Keeps track of records where custom track by is the same, but item identity has changed\n        this._identityChangesHead = null;\n        this._identityChangesTail = null;\n        this._trackByFn = trackByFn || trackByIdentity;\n    }\n    forEachItem(fn) {\n        let record;\n        for (record = this._itHead; record !== null; record = record._next) {\n            fn(record);\n        }\n    }\n    forEachOperation(fn) {\n        let nextIt = this._itHead;\n        let nextRemove = this._removalsHead;\n        let addRemoveOffset = 0;\n        let moveOffsets = null;\n        while (nextIt || nextRemove) {\n            // Figure out which is the next record to process\n            // Order: remove, add, move\n            const record = !nextRemove ||\n                nextIt &&\n                    nextIt.currentIndex <\n                        getPreviousIndex(nextRemove, addRemoveOffset, moveOffsets) ?\n                nextIt :\n                nextRemove;\n            const adjPreviousIndex = getPreviousIndex(record, addRemoveOffset, moveOffsets);\n            const currentIndex = record.currentIndex;\n            // consume the item, and adjust the addRemoveOffset and update moveDistance if necessary\n            if (record === nextRemove) {\n                addRemoveOffset--;\n                nextRemove = nextRemove._nextRemoved;\n            }\n            else {\n                nextIt = nextIt._next;\n                if (record.previousIndex == null) {\n                    addRemoveOffset++;\n                }\n                else {\n                    // INVARIANT:  currentIndex < previousIndex\n                    if (!moveOffsets)\n                        moveOffsets = [];\n                    const localMovePreviousIndex = adjPreviousIndex - addRemoveOffset;\n                    const localCurrentIndex = currentIndex - addRemoveOffset;\n                    if (localMovePreviousIndex != localCurrentIndex) {\n                        for (let i = 0; i < localMovePreviousIndex; i++) {\n                            const offset = i < moveOffsets.length ? moveOffsets[i] : (moveOffsets[i] = 0);\n                            const index = offset + i;\n                            if (localCurrentIndex <= index && index < localMovePreviousIndex) {\n                                moveOffsets[i] = offset + 1;\n                            }\n                        }\n                        const previousIndex = record.previousIndex;\n                        moveOffsets[previousIndex] = localCurrentIndex - localMovePreviousIndex;\n                    }\n                }\n            }\n            if (adjPreviousIndex !== currentIndex) {\n                fn(record, adjPreviousIndex, currentIndex);\n            }\n        }\n    }\n    forEachPreviousItem(fn) {\n        let record;\n        for (record = this._previousItHead; record !== null; record = record._nextPrevious) {\n            fn(record);\n        }\n    }\n    forEachAddedItem(fn) {\n        let record;\n        for (record = this._additionsHead; record !== null; record = record._nextAdded) {\n            fn(record);\n        }\n    }\n    forEachMovedItem(fn) {\n        let record;\n        for (record = this._movesHead; record !== null; record = record._nextMoved) {\n            fn(record);\n        }\n    }\n    forEachRemovedItem(fn) {\n        let record;\n        for (record = this._removalsHead; record !== null; record = record._nextRemoved) {\n            fn(record);\n        }\n    }\n    forEachIdentityChange(fn) {\n        let record;\n        for (record = this._identityChangesHead; record !== null; record = record._nextIdentityChange) {\n            fn(record);\n        }\n    }\n    diff(collection) {\n        if (collection == null)\n            collection = [];\n        if (!isListLikeIterable(collection)) {\n            throw new Error(`Error trying to diff '${stringify(collection)}'. Only arrays and iterables are allowed`);\n        }\n        if (this.check(collection)) {\n            return this;\n        }\n        else {\n            return null;\n        }\n    }\n    onDestroy() { }\n    check(collection) {\n        this._reset();\n        let record = this._itHead;\n        let mayBeDirty = false;\n        let index;\n        let item;\n        let itemTrackBy;\n        if (Array.isArray(collection)) {\n            this.length = collection.length;\n            for (let index = 0; index < this.length; index++) {\n                item = collection[index];\n                itemTrackBy = this._trackByFn(index, item);\n                if (record === null || !Object.is(record.trackById, itemTrackBy)) {\n                    record = this._mismatch(record, item, itemTrackBy, index);\n                    mayBeDirty = true;\n                }\n                else {\n                    if (mayBeDirty) {\n                        // TODO(misko): can we limit this to duplicates only?\n                        record = this._verifyReinsertion(record, item, itemTrackBy, index);\n                    }\n                    if (!Object.is(record.item, item))\n                        this._addIdentityChange(record, item);\n                }\n                record = record._next;\n            }\n        }\n        else {\n            index = 0;\n            iterateListLike(collection, (item) => {\n                itemTrackBy = this._trackByFn(index, item);\n                if (record === null || !Object.is(record.trackById, itemTrackBy)) {\n                    record = this._mismatch(record, item, itemTrackBy, index);\n                    mayBeDirty = true;\n                }\n                else {\n                    if (mayBeDirty) {\n                        // TODO(misko): can we limit this to duplicates only?\n                        record = this._verifyReinsertion(record, item, itemTrackBy, index);\n                    }\n                    if (!Object.is(record.item, item))\n                        this._addIdentityChange(record, item);\n                }\n                record = record._next;\n                index++;\n            });\n            this.length = index;\n        }\n        this._truncate(record);\n        this.collection = collection;\n        return this.isDirty;\n    }\n    /* CollectionChanges is considered dirty if it has any additions, moves, removals, or identity\n     * changes.\n     */\n    get isDirty() {\n        return this._additionsHead !== null || this._movesHead !== null ||\n            this._removalsHead !== null || this._identityChangesHead !== null;\n    }\n    /**\n     * Reset the state of the change objects to show no changes. This means set previousKey to\n     * currentKey, and clear all of the queues (additions, moves, removals).\n     * Set the previousIndexes of moved and added items to their currentIndexes\n     * Reset the list of additions, moves and removals\n     *\n     * @internal\n     */\n    _reset() {\n        if (this.isDirty) {\n            let record;\n            for (record = this._previousItHead = this._itHead; record !== null; record = record._next) {\n                record._nextPrevious = record._next;\n            }\n            for (record = this._additionsHead; record !== null; record = record._nextAdded) {\n                record.previousIndex = record.currentIndex;\n            }\n            this._additionsHead = this._additionsTail = null;\n            for (record = this._movesHead; record !== null; record = record._nextMoved) {\n                record.previousIndex = record.currentIndex;\n            }\n            this._movesHead = this._movesTail = null;\n            this._removalsHead = this._removalsTail = null;\n            this._identityChangesHead = this._identityChangesTail = null;\n            // TODO(vicb): when assert gets supported\n            // assert(!this.isDirty);\n        }\n    }\n    /**\n     * This is the core function which handles differences between collections.\n     *\n     * - `record` is the record which we saw at this position last time. If null then it is a new\n     *   item.\n     * - `item` is the current item in the collection\n     * - `index` is the position of the item in the collection\n     *\n     * @internal\n     */\n    _mismatch(record, item, itemTrackBy, index) {\n        // The previous record after which we will append the current one.\n        let previousRecord;\n        if (record === null) {\n            previousRecord = this._itTail;\n        }\n        else {\n            previousRecord = record._prev;\n            // Remove the record from the collection since we know it does not match the item.\n            this._remove(record);\n        }\n        // Attempt to see if we have seen the item before.\n        record = this._linkedRecords === null ? null : this._linkedRecords.get(itemTrackBy, index);\n        if (record !== null) {\n            // We have seen this before, we need to move it forward in the collection.\n            // But first we need to check if identity changed, so we can update in view if necessary\n            if (!Object.is(record.item, item))\n                this._addIdentityChange(record, item);\n            this._moveAfter(record, previousRecord, index);\n        }\n        else {\n            // Never seen it, check evicted list.\n            record = this._unlinkedRecords === null ? null : this._unlinkedRecords.get(itemTrackBy, null);\n            if (record !== null) {\n                // It is an item which we have evicted earlier: reinsert it back into the list.\n                // But first we need to check if identity changed, so we can update in view if necessary\n                if (!Object.is(record.item, item))\n                    this._addIdentityChange(record, item);\n                this._reinsertAfter(record, previousRecord, index);\n            }\n            else {\n                // It is a new item: add it.\n                record =\n                    this._addAfter(new IterableChangeRecord_(item, itemTrackBy), previousRecord, index);\n            }\n        }\n        return record;\n    }\n    /**\n     * This check is only needed if an array contains duplicates. (Short circuit of nothing dirty)\n     *\n     * Use case: `[a, a]` => `[b, a, a]`\n     *\n     * If we did not have this check then the insertion of `b` would:\n     *   1) evict first `a`\n     *   2) insert `b` at `0` index.\n     *   3) leave `a` at index `1` as is. <-- this is wrong!\n     *   3) reinsert `a` at index 2. <-- this is wrong!\n     *\n     * The correct behavior is:\n     *   1) evict first `a`\n     *   2) insert `b` at `0` index.\n     *   3) reinsert `a` at index 1.\n     *   3) move `a` at from `1` to `2`.\n     *\n     *\n     * Double check that we have not evicted a duplicate item. We need to check if the item type may\n     * have already been removed:\n     * The insertion of b will evict the first 'a'. If we don't reinsert it now it will be reinserted\n     * at the end. Which will show up as the two 'a's switching position. This is incorrect, since a\n     * better way to think of it is as insert of 'b' rather then switch 'a' with 'b' and then add 'a'\n     * at the end.\n     *\n     * @internal\n     */\n    _verifyReinsertion(record, item, itemTrackBy, index) {\n        let reinsertRecord = this._unlinkedRecords === null ? null : this._unlinkedRecords.get(itemTrackBy, null);\n        if (reinsertRecord !== null) {\n            record = this._reinsertAfter(reinsertRecord, record._prev, index);\n        }\n        else if (record.currentIndex != index) {\n            record.currentIndex = index;\n            this._addToMoves(record, index);\n        }\n        return record;\n    }\n    /**\n     * Get rid of any excess {@link IterableChangeRecord_}s from the previous collection\n     *\n     * - `record` The first excess {@link IterableChangeRecord_}.\n     *\n     * @internal\n     */\n    _truncate(record) {\n        // Anything after that needs to be removed;\n        while (record !== null) {\n            const nextRecord = record._next;\n            this._addToRemovals(this._unlink(record));\n            record = nextRecord;\n        }\n        if (this._unlinkedRecords !== null) {\n            this._unlinkedRecords.clear();\n        }\n        if (this._additionsTail !== null) {\n            this._additionsTail._nextAdded = null;\n        }\n        if (this._movesTail !== null) {\n            this._movesTail._nextMoved = null;\n        }\n        if (this._itTail !== null) {\n            this._itTail._next = null;\n        }\n        if (this._removalsTail !== null) {\n            this._removalsTail._nextRemoved = null;\n        }\n        if (this._identityChangesTail !== null) {\n            this._identityChangesTail._nextIdentityChange = null;\n        }\n    }\n    /** @internal */\n    _reinsertAfter(record, prevRecord, index) {\n        if (this._unlinkedRecords !== null) {\n            this._unlinkedRecords.remove(record);\n        }\n        const prev = record._prevRemoved;\n        const next = record._nextRemoved;\n        if (prev === null) {\n            this._removalsHead = next;\n        }\n        else {\n            prev._nextRemoved = next;\n        }\n        if (next === null) {\n            this._removalsTail = prev;\n        }\n        else {\n            next._prevRemoved = prev;\n        }\n        this._insertAfter(record, prevRecord, index);\n        this._addToMoves(record, index);\n        return record;\n    }\n    /** @internal */\n    _moveAfter(record, prevRecord, index) {\n        this._unlink(record);\n        this._insertAfter(record, prevRecord, index);\n        this._addToMoves(record, index);\n        return record;\n    }\n    /** @internal */\n    _addAfter(record, prevRecord, index) {\n        this._insertAfter(record, prevRecord, index);\n        if (this._additionsTail === null) {\n            // TODO(vicb):\n            // assert(this._additionsHead === null);\n            this._additionsTail = this._additionsHead = record;\n        }\n        else {\n            // TODO(vicb):\n            // assert(_additionsTail._nextAdded === null);\n            // assert(record._nextAdded === null);\n            this._additionsTail = this._additionsTail._nextAdded = record;\n        }\n        return record;\n    }\n    /** @internal */\n    _insertAfter(record, prevRecord, index) {\n        // TODO(vicb):\n        // assert(record != prevRecord);\n        // assert(record._next === null);\n        // assert(record._prev === null);\n        const next = prevRecord === null ? this._itHead : prevRecord._next;\n        // TODO(vicb):\n        // assert(next != record);\n        // assert(prevRecord != record);\n        record._next = next;\n        record._prev = prevRecord;\n        if (next === null) {\n            this._itTail = record;\n        }\n        else {\n            next._prev = record;\n        }\n        if (prevRecord === null) {\n            this._itHead = record;\n        }\n        else {\n            prevRecord._next = record;\n        }\n        if (this._linkedRecords === null) {\n            this._linkedRecords = new _DuplicateMap();\n        }\n        this._linkedRecords.put(record);\n        record.currentIndex = index;\n        return record;\n    }\n    /** @internal */\n    _remove(record) {\n        return this._addToRemovals(this._unlink(record));\n    }\n    /** @internal */\n    _unlink(record) {\n        if (this._linkedRecords !== null) {\n            this._linkedRecords.remove(record);\n        }\n        const prev = record._prev;\n        const next = record._next;\n        // TODO(vicb):\n        // assert((record._prev = null) === null);\n        // assert((record._next = null) === null);\n        if (prev === null) {\n            this._itHead = next;\n        }\n        else {\n            prev._next = next;\n        }\n        if (next === null) {\n            this._itTail = prev;\n        }\n        else {\n            next._prev = prev;\n        }\n        return record;\n    }\n    /** @internal */\n    _addToMoves(record, toIndex) {\n        // TODO(vicb):\n        // assert(record._nextMoved === null);\n        if (record.previousIndex === toIndex) {\n            return record;\n        }\n        if (this._movesTail === null) {\n            // TODO(vicb):\n            // assert(_movesHead === null);\n            this._movesTail = this._movesHead = record;\n        }\n        else {\n            // TODO(vicb):\n            // assert(_movesTail._nextMoved === null);\n            this._movesTail = this._movesTail._nextMoved = record;\n        }\n        return record;\n    }\n    _addToRemovals(record) {\n        if (this._unlinkedRecords === null) {\n            this._unlinkedRecords = new _DuplicateMap();\n        }\n        this._unlinkedRecords.put(record);\n        record.currentIndex = null;\n        record._nextRemoved = null;\n        if (this._removalsTail === null) {\n            // TODO(vicb):\n            // assert(_removalsHead === null);\n            this._removalsTail = this._removalsHead = record;\n            record._prevRemoved = null;\n        }\n        else {\n            // TODO(vicb):\n            // assert(_removalsTail._nextRemoved === null);\n            // assert(record._nextRemoved === null);\n            record._prevRemoved = this._removalsTail;\n            this._removalsTail = this._removalsTail._nextRemoved = record;\n        }\n        return record;\n    }\n    /** @internal */\n    _addIdentityChange(record, item) {\n        record.item = item;\n        if (this._identityChangesTail === null) {\n            this._identityChangesTail = this._identityChangesHead = record;\n        }\n        else {\n            this._identityChangesTail = this._identityChangesTail._nextIdentityChange = record;\n        }\n        return record;\n    }\n}\nclass IterableChangeRecord_ {\n    constructor(item, trackById) {\n        this.item = item;\n        this.trackById = trackById;\n        this.currentIndex = null;\n        this.previousIndex = null;\n        /** @internal */\n        this._nextPrevious = null;\n        /** @internal */\n        this._prev = null;\n        /** @internal */\n        this._next = null;\n        /** @internal */\n        this._prevDup = null;\n        /** @internal */\n        this._nextDup = null;\n        /** @internal */\n        this._prevRemoved = null;\n        /** @internal */\n        this._nextRemoved = null;\n        /** @internal */\n        this._nextAdded = null;\n        /** @internal */\n        this._nextMoved = null;\n        /** @internal */\n        this._nextIdentityChange = null;\n    }\n}\n// A linked list of CollectionChangeRecords with the same IterableChangeRecord_.item\nclass _DuplicateItemRecordList {\n    constructor() {\n        /** @internal */\n        this._head = null;\n        /** @internal */\n        this._tail = null;\n    }\n    /**\n     * Append the record to the list of duplicates.\n     *\n     * Note: by design all records in the list of duplicates hold the same value in record.item.\n     */\n    add(record) {\n        if (this._head === null) {\n            this._head = this._tail = record;\n            record._nextDup = null;\n            record._prevDup = null;\n        }\n        else {\n            // TODO(vicb):\n            // assert(record.item ==  _head.item ||\n            //       record.item is num && record.item.isNaN && _head.item is num && _head.item.isNaN);\n            this._tail._nextDup = record;\n            record._prevDup = this._tail;\n            record._nextDup = null;\n            this._tail = record;\n        }\n    }\n    // Returns a IterableChangeRecord_ having IterableChangeRecord_.trackById == trackById and\n    // IterableChangeRecord_.currentIndex >= atOrAfterIndex\n    get(trackById, atOrAfterIndex) {\n        let record;\n        for (record = this._head; record !== null; record = record._nextDup) {\n            if ((atOrAfterIndex === null || atOrAfterIndex <= record.currentIndex) &&\n                Object.is(record.trackById, trackById)) {\n                return record;\n            }\n        }\n        return null;\n    }\n    /**\n     * Remove one {@link IterableChangeRecord_} from the list of duplicates.\n     *\n     * Returns whether the list of duplicates is empty.\n     */\n    remove(record) {\n        // TODO(vicb):\n        // assert(() {\n        //  // verify that the record being removed is in the list.\n        //  for (IterableChangeRecord_ cursor = _head; cursor != null; cursor = cursor._nextDup) {\n        //    if (identical(cursor, record)) return true;\n        //  }\n        //  return false;\n        //});\n        const prev = record._prevDup;\n        const next = record._nextDup;\n        if (prev === null) {\n            this._head = next;\n        }\n        else {\n            prev._nextDup = next;\n        }\n        if (next === null) {\n            this._tail = prev;\n        }\n        else {\n            next._prevDup = prev;\n        }\n        return this._head === null;\n    }\n}\nclass _DuplicateMap {\n    constructor() {\n        this.map = new Map();\n    }\n    put(record) {\n        const key = record.trackById;\n        let duplicates = this.map.get(key);\n        if (!duplicates) {\n            duplicates = new _DuplicateItemRecordList();\n            this.map.set(key, duplicates);\n        }\n        duplicates.add(record);\n    }\n    /**\n     * Retrieve the `value` using key. Because the IterableChangeRecord_ value may be one which we\n     * have already iterated over, we use the `atOrAfterIndex` to pretend it is not there.\n     *\n     * Use case: `[a, b, c, a, a]` if we are at index `3` which is the second `a` then asking if we\n     * have any more `a`s needs to return the second `a`.\n     */\n    get(trackById, atOrAfterIndex) {\n        const key = trackById;\n        const recordList = this.map.get(key);\n        return recordList ? recordList.get(trackById, atOrAfterIndex) : null;\n    }\n    /**\n     * Removes a {@link IterableChangeRecord_} from the list of duplicates.\n     *\n     * The list of duplicates also is removed from the map if it gets empty.\n     */\n    remove(record) {\n        const key = record.trackById;\n        const recordList = this.map.get(key);\n        // Remove the list of duplicates when it gets empty\n        if (recordList.remove(record)) {\n            this.map.delete(key);\n        }\n        return record;\n    }\n    get isEmpty() {\n        return this.map.size === 0;\n    }\n    clear() {\n        this.map.clear();\n    }\n}\nfunction getPreviousIndex(item, addRemoveOffset, moveOffsets) {\n    const previousIndex = item.previousIndex;\n    if (previousIndex === null)\n        return previousIndex;\n    let moveOffset = 0;\n    if (moveOffsets && previousIndex < moveOffsets.length) {\n        moveOffset = moveOffsets[previousIndex];\n    }\n    return previousIndex + addRemoveOffset + moveOffset;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass DefaultKeyValueDifferFactory {\n    constructor() { }\n    supports(obj) {\n        return obj instanceof Map || isJsObject(obj);\n    }\n    create() {\n        return new DefaultKeyValueDiffer();\n    }\n}\nclass DefaultKeyValueDiffer {\n    constructor() {\n        this._records = new Map();\n        this._mapHead = null;\n        // _appendAfter is used in the check loop\n        this._appendAfter = null;\n        this._previousMapHead = null;\n        this._changesHead = null;\n        this._changesTail = null;\n        this._additionsHead = null;\n        this._additionsTail = null;\n        this._removalsHead = null;\n        this._removalsTail = null;\n    }\n    get isDirty() {\n        return this._additionsHead !== null || this._changesHead !== null ||\n            this._removalsHead !== null;\n    }\n    forEachItem(fn) {\n        let record;\n        for (record = this._mapHead; record !== null; record = record._next) {\n            fn(record);\n        }\n    }\n    forEachPreviousItem(fn) {\n        let record;\n        for (record = this._previousMapHead; record !== null; record = record._nextPrevious) {\n            fn(record);\n        }\n    }\n    forEachChangedItem(fn) {\n        let record;\n        for (record = this._changesHead; record !== null; record = record._nextChanged) {\n            fn(record);\n        }\n    }\n    forEachAddedItem(fn) {\n        let record;\n        for (record = this._additionsHead; record !== null; record = record._nextAdded) {\n            fn(record);\n        }\n    }\n    forEachRemovedItem(fn) {\n        let record;\n        for (record = this._removalsHead; record !== null; record = record._nextRemoved) {\n            fn(record);\n        }\n    }\n    diff(map) {\n        if (!map) {\n            map = new Map();\n        }\n        else if (!(map instanceof Map || isJsObject(map))) {\n            throw new Error(`Error trying to diff '${stringify(map)}'. Only maps and objects are allowed`);\n        }\n        return this.check(map) ? this : null;\n    }\n    onDestroy() { }\n    /**\n     * Check the current state of the map vs the previous.\n     * The algorithm is optimised for when the keys do no change.\n     */\n    check(map) {\n        this._reset();\n        let insertBefore = this._mapHead;\n        this._appendAfter = null;\n        this._forEach(map, (value, key) => {\n            if (insertBefore && insertBefore.key === key) {\n                this._maybeAddToChanges(insertBefore, value);\n                this._appendAfter = insertBefore;\n                insertBefore = insertBefore._next;\n            }\n            else {\n                const record = this._getOrCreateRecordForKey(key, value);\n                insertBefore = this._insertBeforeOrAppend(insertBefore, record);\n            }\n        });\n        // Items remaining at the end of the list have been deleted\n        if (insertBefore) {\n            if (insertBefore._prev) {\n                insertBefore._prev._next = null;\n            }\n            this._removalsHead = insertBefore;\n            for (let record = insertBefore; record !== null; record = record._nextRemoved) {\n                if (record === this._mapHead) {\n                    this._mapHead = null;\n                }\n                this._records.delete(record.key);\n                record._nextRemoved = record._next;\n                record.previousValue = record.currentValue;\n                record.currentValue = null;\n                record._prev = null;\n                record._next = null;\n            }\n        }\n        // Make sure tails have no next records from previous runs\n        if (this._changesTail)\n            this._changesTail._nextChanged = null;\n        if (this._additionsTail)\n            this._additionsTail._nextAdded = null;\n        return this.isDirty;\n    }\n    /**\n     * Inserts a record before `before` or append at the end of the list when `before` is null.\n     *\n     * Notes:\n     * - This method appends at `this._appendAfter`,\n     * - This method updates `this._appendAfter`,\n     * - The return value is the new value for the insertion pointer.\n     */\n    _insertBeforeOrAppend(before, record) {\n        if (before) {\n            const prev = before._prev;\n            record._next = before;\n            record._prev = prev;\n            before._prev = record;\n            if (prev) {\n                prev._next = record;\n            }\n            if (before === this._mapHead) {\n                this._mapHead = record;\n            }\n            this._appendAfter = before;\n            return before;\n        }\n        if (this._appendAfter) {\n            this._appendAfter._next = record;\n            record._prev = this._appendAfter;\n        }\n        else {\n            this._mapHead = record;\n        }\n        this._appendAfter = record;\n        return null;\n    }\n    _getOrCreateRecordForKey(key, value) {\n        if (this._records.has(key)) {\n            const record = this._records.get(key);\n            this._maybeAddToChanges(record, value);\n            const prev = record._prev;\n            const next = record._next;\n            if (prev) {\n                prev._next = next;\n            }\n            if (next) {\n                next._prev = prev;\n            }\n            record._next = null;\n            record._prev = null;\n            return record;\n        }\n        const record = new KeyValueChangeRecord_(key);\n        this._records.set(key, record);\n        record.currentValue = value;\n        this._addToAdditions(record);\n        return record;\n    }\n    /** @internal */\n    _reset() {\n        if (this.isDirty) {\n            let record;\n            // let `_previousMapHead` contain the state of the map before the changes\n            this._previousMapHead = this._mapHead;\n            for (record = this._previousMapHead; record !== null; record = record._next) {\n                record._nextPrevious = record._next;\n            }\n            // Update `record.previousValue` with the value of the item before the changes\n            // We need to update all changed items (that's those which have been added and changed)\n            for (record = this._changesHead; record !== null; record = record._nextChanged) {\n                record.previousValue = record.currentValue;\n            }\n            for (record = this._additionsHead; record != null; record = record._nextAdded) {\n                record.previousValue = record.currentValue;\n            }\n            this._changesHead = this._changesTail = null;\n            this._additionsHead = this._additionsTail = null;\n            this._removalsHead = null;\n        }\n    }\n    // Add the record or a given key to the list of changes only when the value has actually changed\n    _maybeAddToChanges(record, newValue) {\n        if (!Object.is(newValue, record.currentValue)) {\n            record.previousValue = record.currentValue;\n            record.currentValue = newValue;\n            this._addToChanges(record);\n        }\n    }\n    _addToAdditions(record) {\n        if (this._additionsHead === null) {\n            this._additionsHead = this._additionsTail = record;\n        }\n        else {\n            this._additionsTail._nextAdded = record;\n            this._additionsTail = record;\n        }\n    }\n    _addToChanges(record) {\n        if (this._changesHead === null) {\n            this._changesHead = this._changesTail = record;\n        }\n        else {\n            this._changesTail._nextChanged = record;\n            this._changesTail = record;\n        }\n    }\n    /** @internal */\n    _forEach(obj, fn) {\n        if (obj instanceof Map) {\n            obj.forEach(fn);\n        }\n        else {\n            Object.keys(obj).forEach(k => fn(obj[k], k));\n        }\n    }\n}\nclass KeyValueChangeRecord_ {\n    constructor(key) {\n        this.key = key;\n        this.previousValue = null;\n        this.currentValue = null;\n        /** @internal */\n        this._nextPrevious = null;\n        /** @internal */\n        this._next = null;\n        /** @internal */\n        this._prev = null;\n        /** @internal */\n        this._nextAdded = null;\n        /** @internal */\n        this._nextRemoved = null;\n        /** @internal */\n        this._nextChanged = null;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * A repository of different iterable diffing strategies used by NgFor, NgClass, and others.\n *\n * @publicApi\n */\nclass IterableDiffers {\n    constructor(factories) {\n        this.factories = factories;\n    }\n    static create(factories, parent) {\n        if (parent != null) {\n            const copied = parent.factories.slice();\n            factories = factories.concat(copied);\n        }\n        return new IterableDiffers(factories);\n    }\n    /**\n     * Takes an array of {@link IterableDifferFactory} and returns a provider used to extend the\n     * inherited {@link IterableDiffers} instance with the provided factories and return a new\n     * {@link IterableDiffers} instance.\n     *\n     * @usageNotes\n     * ### Example\n     *\n     * The following example shows how to extend an existing list of factories,\n     * which will only be applied to the injector for this component and its children.\n     * This step is all that's required to make a new {@link IterableDiffer} available.\n     *\n     * ```\n     * @Component({\n     *   viewProviders: [\n     *     IterableDiffers.extend([new ImmutableListDiffer()])\n     *   ]\n     * })\n     * ```\n     */\n    static extend(factories) {\n        return {\n            provide: IterableDiffers,\n            useFactory: (parent) => {\n                if (!parent) {\n                    // Typically would occur when calling IterableDiffers.extend inside of dependencies passed\n                    // to\n                    // bootstrap(), which would override default pipes instead of extending them.\n                    throw new Error('Cannot extend IterableDiffers without a parent injector');\n                }\n                return IterableDiffers.create(factories, parent);\n            },\n            // Dependency technically isn't optional, but we can provide a better error message this way.\n            deps: [[IterableDiffers, new SkipSelf(), new Optional()]]\n        };\n    }\n    find(iterable) {\n        const factory = this.factories.find(f => f.supports(iterable));\n        if (factory != null) {\n            return factory;\n        }\n        else {\n            throw new Error(`Cannot find a differ supporting object '${iterable}' of type '${getTypeNameForDebugging(iterable)}'`);\n        }\n    }\n}\n/** @nocollapse */\nIterableDiffers.ɵprov = ɵɵdefineInjectable({\n    token: IterableDiffers,\n    providedIn: 'root',\n    factory: () => new IterableDiffers([new DefaultIterableDifferFactory()])\n});\nfunction getTypeNameForDebugging(type) {\n    return type['name'] || typeof type;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * A repository of different Map diffing strategies used by NgClass, NgStyle, and others.\n *\n * @publicApi\n */\nclass KeyValueDiffers {\n    constructor(factories) {\n        this.factories = factories;\n    }\n    static create(factories, parent) {\n        if (parent) {\n            const copied = parent.factories.slice();\n            factories = factories.concat(copied);\n        }\n        return new KeyValueDiffers(factories);\n    }\n    /**\n     * Takes an array of {@link KeyValueDifferFactory} and returns a provider used to extend the\n     * inherited {@link KeyValueDiffers} instance with the provided factories and return a new\n     * {@link KeyValueDiffers} instance.\n     *\n     * @usageNotes\n     * ### Example\n     *\n     * The following example shows how to extend an existing list of factories,\n     * which will only be applied to the injector for this component and its children.\n     * This step is all that's required to make a new {@link KeyValueDiffer} available.\n     *\n     * ```\n     * @Component({\n     *   viewProviders: [\n     *     KeyValueDiffers.extend([new ImmutableMapDiffer()])\n     *   ]\n     * })\n     * ```\n     */\n    static extend(factories) {\n        return {\n            provide: KeyValueDiffers,\n            useFactory: (parent) => {\n                if (!parent) {\n                    // Typically would occur when calling KeyValueDiffers.extend inside of dependencies passed\n                    // to bootstrap(), which would override default pipes instead of extending them.\n                    throw new Error('Cannot extend KeyValueDiffers without a parent injector');\n                }\n                return KeyValueDiffers.create(factories, parent);\n            },\n            // Dependency technically isn't optional, but we can provide a better error message this way.\n            deps: [[KeyValueDiffers, new SkipSelf(), new Optional()]]\n        };\n    }\n    find(kv) {\n        const factory = this.factories.find(f => f.supports(kv));\n        if (factory) {\n            return factory;\n        }\n        throw new Error(`Cannot find a differ supporting object '${kv}'`);\n    }\n}\n/** @nocollapse */\nKeyValueDiffers.ɵprov = ɵɵdefineInjectable({\n    token: KeyValueDiffers,\n    providedIn: 'root',\n    factory: () => new KeyValueDiffers([new DefaultKeyValueDifferFactory()])\n});\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Structural diffing for `Object`s and `Map`s.\n */\nconst keyValDiff = [new DefaultKeyValueDifferFactory()];\n/**\n * Structural diffing for `Iterable` types such as `Array`s.\n */\nconst iterableDiff = [new DefaultIterableDifferFactory()];\nconst defaultIterableDiffers = new IterableDiffers(iterableDiff);\nconst defaultKeyValueDiffers = new KeyValueDiffers(keyValDiff);\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Represents an embedded template that can be used to instantiate embedded views.\n * To instantiate embedded views based on a template, use the `ViewContainerRef`\n * method `createEmbeddedView()`.\n *\n * Access a `TemplateRef` instance by placing a directive on an `<ng-template>`\n * element (or directive prefixed with `*`). The `TemplateRef` for the embedded view\n * is injected into the constructor of the directive,\n * using the `TemplateRef` token.\n *\n * You can also use a `Query` to find a `TemplateRef` associated with\n * a component or a directive.\n *\n * @see `ViewContainerRef`\n * @see [Navigate the Component Tree with DI](guide/dependency-injection-navtree)\n *\n * @publicApi\n */\nclass TemplateRef {\n}\n/**\n * @internal\n * @nocollapse\n */\nTemplateRef.__NG_ELEMENT_ID__ = () => SWITCH_TEMPLATE_REF_FACTORY(TemplateRef, ElementRef);\nconst SWITCH_TEMPLATE_REF_FACTORY__POST_R3__ = injectTemplateRef;\nconst SWITCH_TEMPLATE_REF_FACTORY__PRE_R3__ = noop;\nconst SWITCH_TEMPLATE_REF_FACTORY = SWITCH_TEMPLATE_REF_FACTORY__POST_R3__;\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Represents a container where one or more views can be attached to a component.\n *\n * Can contain *host views* (created by instantiating a\n * component with the `createComponent()` method), and *embedded views*\n * (created by instantiating a `TemplateRef` with the `createEmbeddedView()` method).\n *\n * A view container instance can contain other view containers,\n * creating a [view hierarchy](guide/glossary#view-tree).\n *\n * @see `ComponentRef`\n * @see `EmbeddedViewRef`\n *\n * @publicApi\n */\nclass ViewContainerRef {\n}\n/**\n * @internal\n * @nocollapse\n */\nViewContainerRef.__NG_ELEMENT_ID__ = () => SWITCH_VIEW_CONTAINER_REF_FACTORY(ViewContainerRef, ElementRef);\nconst SWITCH_VIEW_CONTAINER_REF_FACTORY__POST_R3__ = injectViewContainerRef;\nconst SWITCH_VIEW_CONTAINER_REF_FACTORY__PRE_R3__ = noop;\nconst SWITCH_VIEW_CONTAINER_REF_FACTORY = SWITCH_VIEW_CONTAINER_REF_FACTORY__POST_R3__;\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction expressionChangedAfterItHasBeenCheckedError(context, oldValue, currValue, isFirstCheck) {\n    let msg = `ExpressionChangedAfterItHasBeenCheckedError: Expression has changed after it was checked. Previous value: '${oldValue}'. Current value: '${currValue}'.`;\n    if (isFirstCheck) {\n        msg +=\n            ` It seems like the view has been created after its parent and its children have been dirty checked.` +\n                ` Has it been created in a change detection hook ?`;\n    }\n    return viewDebugError(msg, context);\n}\nfunction viewWrappedDebugError(err, context) {\n    if (!(err instanceof Error)) {\n        // errors that are not Error instances don't have a stack,\n        // so it is ok to wrap them into a new Error object...\n        err = new Error(err.toString());\n    }\n    _addDebugContext(err, context);\n    return err;\n}\nfunction viewDebugError(msg, context) {\n    const err = new Error(msg);\n    _addDebugContext(err, context);\n    return err;\n}\nfunction _addDebugContext(err, context) {\n    err[ERROR_DEBUG_CONTEXT] = context;\n    err[ERROR_LOGGER] = context.logError.bind(context);\n}\nfunction isViewDebugError(err) {\n    return !!getDebugContext(err);\n}\nfunction viewDestroyedError(action) {\n    return new Error(`ViewDestroyedError: Attempt to use a destroyed view: ${action}`);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// Called before each cycle of a view's check to detect whether this is in the\n// initState for which we need to call ngOnInit, ngAfterContentInit or ngAfterViewInit\n// lifecycle methods. Returns true if this check cycle should call lifecycle\n// methods.\nfunction shiftInitState(view, priorInitState, newInitState) {\n    // Only update the InitState if we are currently in the prior state.\n    // For example, only move into CallingInit if we are in BeforeInit. Only\n    // move into CallingContentInit if we are in CallingInit. Normally this will\n    // always be true because of how checkCycle is called in checkAndUpdateView.\n    // However, if checkAndUpdateView is called recursively or if an exception is\n    // thrown while checkAndUpdateView is running, checkAndUpdateView starts over\n    // from the beginning. This ensures the state is monotonically increasing,\n    // terminating in the AfterInit state, which ensures the Init methods are called\n    // at least once and only once.\n    const state = view.state;\n    const initState = state & 1792 /* InitState_Mask */;\n    if (initState === priorInitState) {\n        view.state = (state & ~1792 /* InitState_Mask */) | newInitState;\n        view.initIndex = -1;\n        return true;\n    }\n    return initState === newInitState;\n}\n// Returns true if the lifecycle init method should be called for the node with\n// the given init index.\nfunction shouldCallLifecycleInitHook(view, initState, index) {\n    if ((view.state & 1792 /* InitState_Mask */) === initState && view.initIndex <= index) {\n        view.initIndex = index + 1;\n        return true;\n    }\n    return false;\n}\n/**\n * Node instance data.\n *\n * We have a separate type per NodeType to save memory\n * (TextData | ElementData | ProviderData | PureExpressionData | QueryList<any>)\n *\n * To keep our code monomorphic,\n * we prohibit using `NodeData` directly but enforce the use of accessors (`asElementData`, ...).\n * This way, no usage site can get a `NodeData` from view.nodes and then use it for different\n * purposes.\n */\nclass NodeData {\n}\n/**\n * Accessor for view.nodes, enforcing that every usage site stays monomorphic.\n */\nfunction asTextData(view, index) {\n    return view.nodes[index];\n}\n/**\n * Accessor for view.nodes, enforcing that every usage site stays monomorphic.\n */\nfunction asElementData(view, index) {\n    return view.nodes[index];\n}\n/**\n * Accessor for view.nodes, enforcing that every usage site stays monomorphic.\n */\nfunction asProviderData(view, index) {\n    return view.nodes[index];\n}\n/**\n * Accessor for view.nodes, enforcing that every usage site stays monomorphic.\n */\nfunction asPureExpressionData(view, index) {\n    return view.nodes[index];\n}\n/**\n * Accessor for view.nodes, enforcing that every usage site stays monomorphic.\n */\nfunction asQueryList(view, index) {\n    return view.nodes[index];\n}\nclass DebugContext {\n}\n/**\n * This object is used to prevent cycles in the source files and to have a place where\n * debug mode can hook it. It is lazily filled when `isDevMode` is known.\n */\nconst Services = {\n    setCurrentNode: undefined,\n    createRootView: undefined,\n    createEmbeddedView: undefined,\n    createComponentView: undefined,\n    createNgModuleRef: undefined,\n    overrideProvider: undefined,\n    overrideComponentView: undefined,\n    clearOverrides: undefined,\n    checkAndUpdateView: undefined,\n    checkNoChangesView: undefined,\n    destroyView: undefined,\n    resolveDep: undefined,\n    createDebugContext: undefined,\n    handleEvent: undefined,\n    updateDirectives: undefined,\n    updateRenderer: undefined,\n    dirtyParentQueries: undefined,\n};\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst NOOP = () => { };\nconst _tokenKeyCache = new Map();\nfunction tokenKey(token) {\n    let key = _tokenKeyCache.get(token);\n    if (!key) {\n        key = stringify(token) + '_' + _tokenKeyCache.size;\n        _tokenKeyCache.set(token, key);\n    }\n    return key;\n}\nfunction unwrapValue(view, nodeIdx, bindingIdx, value) {\n    if (WrappedValue.isWrapped(value)) {\n        value = WrappedValue.unwrap(value);\n        const globalBindingIdx = view.def.nodes[nodeIdx].bindingIndex + bindingIdx;\n        const oldValue = WrappedValue.unwrap(view.oldValues[globalBindingIdx]);\n        view.oldValues[globalBindingIdx] = new WrappedValue(oldValue);\n    }\n    return value;\n}\nconst UNDEFINED_RENDERER_TYPE_ID = '$$undefined';\nconst EMPTY_RENDERER_TYPE_ID = '$$empty';\n// Attention: this function is called as top level function.\n// Putting any logic in here will destroy closure tree shaking!\nfunction createRendererType2(values) {\n    return {\n        id: UNDEFINED_RENDERER_TYPE_ID,\n        styles: values.styles,\n        encapsulation: values.encapsulation,\n        data: values.data\n    };\n}\nlet _renderCompCount$1 = 0;\nfunction resolveRendererType2(type) {\n    if (type && type.id === UNDEFINED_RENDERER_TYPE_ID) {\n        // first time we see this RendererType2. Initialize it...\n        const isFilled = ((type.encapsulation != null && type.encapsulation !== ViewEncapsulation$1.None) ||\n            type.styles.length || Object.keys(type.data).length);\n        if (isFilled) {\n            type.id = `c${_renderCompCount$1++}`;\n        }\n        else {\n            type.id = EMPTY_RENDERER_TYPE_ID;\n        }\n    }\n    if (type && type.id === EMPTY_RENDERER_TYPE_ID) {\n        type = null;\n    }\n    return type || null;\n}\nfunction checkBinding(view, def, bindingIdx, value) {\n    const oldValues = view.oldValues;\n    if ((view.state & 2 /* FirstCheck */) ||\n        !Object.is(oldValues[def.bindingIndex + bindingIdx], value)) {\n        return true;\n    }\n    return false;\n}\nfunction checkAndUpdateBinding(view, def, bindingIdx, value) {\n    if (checkBinding(view, def, bindingIdx, value)) {\n        view.oldValues[def.bindingIndex + bindingIdx] = value;\n        return true;\n    }\n    return false;\n}\nfunction checkBindingNoChanges(view, def, bindingIdx, value) {\n    const oldValue = view.oldValues[def.bindingIndex + bindingIdx];\n    if ((view.state & 1 /* BeforeFirstCheck */) || !devModeEqual(oldValue, value)) {\n        const bindingName = def.bindings[bindingIdx].name;\n        throw expressionChangedAfterItHasBeenCheckedError(Services.createDebugContext(view, def.nodeIndex), `${bindingName}: ${oldValue}`, `${bindingName}: ${value}`, (view.state & 1 /* BeforeFirstCheck */) !== 0);\n    }\n}\nfunction markParentViewsForCheck(view) {\n    let currView = view;\n    while (currView) {\n        if (currView.def.flags & 2 /* OnPush */) {\n            currView.state |= 8 /* ChecksEnabled */;\n        }\n        currView = currView.viewContainerParent || currView.parent;\n    }\n}\nfunction markParentViewsForCheckProjectedViews(view, endView) {\n    let currView = view;\n    while (currView && currView !== endView) {\n        currView.state |= 64 /* CheckProjectedViews */;\n        currView = currView.viewContainerParent || currView.parent;\n    }\n}\nfunction dispatchEvent(view, nodeIndex, eventName, event) {\n    try {\n        const nodeDef = view.def.nodes[nodeIndex];\n        const startView = nodeDef.flags & 33554432 /* ComponentView */ ?\n            asElementData(view, nodeIndex).componentView :\n            view;\n        markParentViewsForCheck(startView);\n        return Services.handleEvent(view, nodeIndex, eventName, event);\n    }\n    catch (e) {\n        // Attention: Don't rethrow, as it would cancel Observable subscriptions!\n        view.root.errorHandler.handleError(e);\n    }\n}\nfunction declaredViewContainer(view) {\n    if (view.parent) {\n        const parentView = view.parent;\n        return asElementData(parentView, view.parentNodeDef.nodeIndex);\n    }\n    return null;\n}\n/**\n * for component views, this is the host element.\n * for embedded views, this is the index of the parent node\n * that contains the view container.\n */\nfunction viewParentEl(view) {\n    const parentView = view.parent;\n    if (parentView) {\n        return view.parentNodeDef.parent;\n    }\n    else {\n        return null;\n    }\n}\nfunction renderNode(view, def) {\n    switch (def.flags & 201347067 /* Types */) {\n        case 1 /* TypeElement */:\n            return asElementData(view, def.nodeIndex).renderElement;\n        case 2 /* TypeText */:\n            return asTextData(view, def.nodeIndex).renderText;\n    }\n}\nfunction elementEventFullName(target, name) {\n    return target ? `${target}:${name}` : name;\n}\nfunction isComponentView(view) {\n    return !!view.parent && !!(view.parentNodeDef.flags & 32768 /* Component */);\n}\nfunction isEmbeddedView(view) {\n    return !!view.parent && !(view.parentNodeDef.flags & 32768 /* Component */);\n}\nfunction filterQueryId(queryId) {\n    return 1 << (queryId % 32);\n}\nfunction splitMatchedQueriesDsl(matchedQueriesDsl) {\n    const matchedQueries = {};\n    let matchedQueryIds = 0;\n    const references = {};\n    if (matchedQueriesDsl) {\n        matchedQueriesDsl.forEach(([queryId, valueType]) => {\n            if (typeof queryId === 'number') {\n                matchedQueries[queryId] = valueType;\n                matchedQueryIds |= filterQueryId(queryId);\n            }\n            else {\n                references[queryId] = valueType;\n            }\n        });\n    }\n    return { matchedQueries, references, matchedQueryIds };\n}\nfunction splitDepsDsl(deps, sourceName) {\n    return deps.map(value => {\n        let token;\n        let flags;\n        if (Array.isArray(value)) {\n            [flags, token] = value;\n        }\n        else {\n            flags = 0 /* None */;\n            token = value;\n        }\n        if (token && (typeof token === 'function' || typeof token === 'object') && sourceName) {\n            Object.defineProperty(token, SOURCE, { value: sourceName, configurable: true });\n        }\n        return { flags, token, tokenKey: tokenKey(token) };\n    });\n}\nfunction getParentRenderElement(view, renderHost, def) {\n    let renderParent = def.renderParent;\n    if (renderParent) {\n        if ((renderParent.flags & 1 /* TypeElement */) === 0 ||\n            (renderParent.flags & 33554432 /* ComponentView */) === 0 ||\n            (renderParent.element.componentRendererType &&\n                renderParent.element.componentRendererType.encapsulation === ViewEncapsulation$1.Native)) {\n            // only children of non components, or children of components with native encapsulation should\n            // be attached.\n            return asElementData(view, def.renderParent.nodeIndex).renderElement;\n        }\n    }\n    else {\n        return renderHost;\n    }\n}\nconst DEFINITION_CACHE = new WeakMap();\nfunction resolveDefinition(factory) {\n    let value = DEFINITION_CACHE.get(factory);\n    if (!value) {\n        value = factory(() => NOOP);\n        value.factory = factory;\n        DEFINITION_CACHE.set(factory, value);\n    }\n    return value;\n}\nfunction rootRenderNodes(view) {\n    const renderNodes = [];\n    visitRootRenderNodes(view, 0 /* Collect */, undefined, undefined, renderNodes);\n    return renderNodes;\n}\nfunction visitRootRenderNodes(view, action, parentNode, nextSibling, target) {\n    // We need to re-compute the parent node in case the nodes have been moved around manually\n    if (action === 3 /* RemoveChild */) {\n        parentNode = view.renderer.parentNode(renderNode(view, view.def.lastRenderRootNode));\n    }\n    visitSiblingRenderNodes(view, action, 0, view.def.nodes.length - 1, parentNode, nextSibling, target);\n}\nfunction visitSiblingRenderNodes(view, action, startIndex, endIndex, parentNode, nextSibling, target) {\n    for (let i = startIndex; i <= endIndex; i++) {\n        const nodeDef = view.def.nodes[i];\n        if (nodeDef.flags & (1 /* TypeElement */ | 2 /* TypeText */ | 8 /* TypeNgContent */)) {\n            visitRenderNode(view, nodeDef, action, parentNode, nextSibling, target);\n        }\n        // jump to next sibling\n        i += nodeDef.childCount;\n    }\n}\nfunction visitProjectedRenderNodes(view, ngContentIndex, action, parentNode, nextSibling, target) {\n    let compView = view;\n    while (compView && !isComponentView(compView)) {\n        compView = compView.parent;\n    }\n    const hostView = compView.parent;\n    const hostElDef = viewParentEl(compView);\n    const startIndex = hostElDef.nodeIndex + 1;\n    const endIndex = hostElDef.nodeIndex + hostElDef.childCount;\n    for (let i = startIndex; i <= endIndex; i++) {\n        const nodeDef = hostView.def.nodes[i];\n        if (nodeDef.ngContentIndex === ngContentIndex) {\n            visitRenderNode(hostView, nodeDef, action, parentNode, nextSibling, target);\n        }\n        // jump to next sibling\n        i += nodeDef.childCount;\n    }\n    if (!hostView.parent) {\n        // a root view\n        const projectedNodes = view.root.projectableNodes[ngContentIndex];\n        if (projectedNodes) {\n            for (let i = 0; i < projectedNodes.length; i++) {\n                execRenderNodeAction(view, projectedNodes[i], action, parentNode, nextSibling, target);\n            }\n        }\n    }\n}\nfunction visitRenderNode(view, nodeDef, action, parentNode, nextSibling, target) {\n    if (nodeDef.flags & 8 /* TypeNgContent */) {\n        visitProjectedRenderNodes(view, nodeDef.ngContent.index, action, parentNode, nextSibling, target);\n    }\n    else {\n        const rn = renderNode(view, nodeDef);\n        if (action === 3 /* RemoveChild */ && (nodeDef.flags & 33554432 /* ComponentView */) &&\n            (nodeDef.bindingFlags & 48 /* CatSyntheticProperty */)) {\n            // Note: we might need to do both actions.\n            if (nodeDef.bindingFlags & (16 /* SyntheticProperty */)) {\n                execRenderNodeAction(view, rn, action, parentNode, nextSibling, target);\n            }\n            if (nodeDef.bindingFlags & (32 /* SyntheticHostProperty */)) {\n                const compView = asElementData(view, nodeDef.nodeIndex).componentView;\n                execRenderNodeAction(compView, rn, action, parentNode, nextSibling, target);\n            }\n        }\n        else {\n            execRenderNodeAction(view, rn, action, parentNode, nextSibling, target);\n        }\n        if (nodeDef.flags & 16777216 /* EmbeddedViews */) {\n            const embeddedViews = asElementData(view, nodeDef.nodeIndex).viewContainer._embeddedViews;\n            for (let k = 0; k < embeddedViews.length; k++) {\n                visitRootRenderNodes(embeddedViews[k], action, parentNode, nextSibling, target);\n            }\n        }\n        if (nodeDef.flags & 1 /* TypeElement */ && !nodeDef.element.name) {\n            visitSiblingRenderNodes(view, action, nodeDef.nodeIndex + 1, nodeDef.nodeIndex + nodeDef.childCount, parentNode, nextSibling, target);\n        }\n    }\n}\nfunction execRenderNodeAction(view, renderNode, action, parentNode, nextSibling, target) {\n    const renderer = view.renderer;\n    switch (action) {\n        case 1 /* AppendChild */:\n            renderer.appendChild(parentNode, renderNode);\n            break;\n        case 2 /* InsertBefore */:\n            renderer.insertBefore(parentNode, renderNode, nextSibling);\n            break;\n        case 3 /* RemoveChild */:\n            renderer.removeChild(parentNode, renderNode);\n            break;\n        case 0 /* Collect */:\n            target.push(renderNode);\n            break;\n    }\n}\nconst NS_PREFIX_RE = /^:([^:]+):(.+)$/;\nfunction splitNamespace(name) {\n    if (name[0] === ':') {\n        const match = name.match(NS_PREFIX_RE);\n        return [match[1], match[2]];\n    }\n    return ['', name];\n}\nfunction calcBindingFlags(bindings) {\n    let flags = 0;\n    for (let i = 0; i < bindings.length; i++) {\n        flags |= bindings[i].flags;\n    }\n    return flags;\n}\nfunction interpolate(valueCount, constAndInterp) {\n    let result = '';\n    for (let i = 0; i < valueCount * 2; i = i + 2) {\n        result = result + constAndInterp[i] + _toStringWithNull(constAndInterp[i + 1]);\n    }\n    return result + constAndInterp[valueCount * 2];\n}\nfunction inlineInterpolate(valueCount, c0, a1, c1, a2, c2, a3, c3, a4, c4, a5, c5, a6, c6, a7, c7, a8, c8, a9, c9) {\n    switch (valueCount) {\n        case 1:\n            return c0 + _toStringWithNull(a1) + c1;\n        case 2:\n            return c0 + _toStringWithNull(a1) + c1 + _toStringWithNull(a2) + c2;\n        case 3:\n            return c0 + _toStringWithNull(a1) + c1 + _toStringWithNull(a2) + c2 + _toStringWithNull(a3) +\n                c3;\n        case 4:\n            return c0 + _toStringWithNull(a1) + c1 + _toStringWithNull(a2) + c2 + _toStringWithNull(a3) +\n                c3 + _toStringWithNull(a4) + c4;\n        case 5:\n            return c0 + _toStringWithNull(a1) + c1 + _toStringWithNull(a2) + c2 + _toStringWithNull(a3) +\n                c3 + _toStringWithNull(a4) + c4 + _toStringWithNull(a5) + c5;\n        case 6:\n            return c0 + _toStringWithNull(a1) + c1 + _toStringWithNull(a2) + c2 + _toStringWithNull(a3) +\n                c3 + _toStringWithNull(a4) + c4 + _toStringWithNull(a5) + c5 + _toStringWithNull(a6) + c6;\n        case 7:\n            return c0 + _toStringWithNull(a1) + c1 + _toStringWithNull(a2) + c2 + _toStringWithNull(a3) +\n                c3 + _toStringWithNull(a4) + c4 + _toStringWithNull(a5) + c5 + _toStringWithNull(a6) +\n                c6 + _toStringWithNull(a7) + c7;\n        case 8:\n            return c0 + _toStringWithNull(a1) + c1 + _toStringWithNull(a2) + c2 + _toStringWithNull(a3) +\n                c3 + _toStringWithNull(a4) + c4 + _toStringWithNull(a5) + c5 + _toStringWithNull(a6) +\n                c6 + _toStringWithNull(a7) + c7 + _toStringWithNull(a8) + c8;\n        case 9:\n            return c0 + _toStringWithNull(a1) + c1 + _toStringWithNull(a2) + c2 + _toStringWithNull(a3) +\n                c3 + _toStringWithNull(a4) + c4 + _toStringWithNull(a5) + c5 + _toStringWithNull(a6) +\n                c6 + _toStringWithNull(a7) + c7 + _toStringWithNull(a8) + c8 + _toStringWithNull(a9) + c9;\n        default:\n            throw new Error(`Does not support more than 9 expressions`);\n    }\n}\nfunction _toStringWithNull(v) {\n    return v != null ? v.toString() : '';\n}\nconst EMPTY_ARRAY$4 = [];\nconst EMPTY_MAP = {};\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst UNDEFINED_VALUE = {};\nconst InjectorRefTokenKey = tokenKey(Injector);\nconst INJECTORRefTokenKey = tokenKey(INJECTOR);\nconst NgModuleRefTokenKey = tokenKey(NgModuleRef);\nfunction moduleProvideDef(flags, token, value, deps) {\n    // Need to resolve forwardRefs as e.g. for `useValue` we\n    // lowered the expression and then stopped evaluating it,\n    // i.e. also didn't unwrap it.\n    value = resolveForwardRef(value);\n    const depDefs = splitDepsDsl(deps, stringify(token));\n    return {\n        // will bet set by the module definition\n        index: -1,\n        deps: depDefs,\n        flags,\n        token,\n        value\n    };\n}\nfunction moduleDef(providers) {\n    const providersByKey = {};\n    const modules = [];\n    let scope = null;\n    for (let i = 0; i < providers.length; i++) {\n        const provider = providers[i];\n        if (provider.token === INJECTOR_SCOPE) {\n            scope = provider.value;\n        }\n        if (provider.flags & 1073741824 /* TypeNgModule */) {\n            modules.push(provider.token);\n        }\n        provider.index = i;\n        providersByKey[tokenKey(provider.token)] = provider;\n    }\n    return {\n        // Will be filled later...\n        factory: null,\n        providersByKey,\n        providers,\n        modules,\n        scope: scope,\n    };\n}\nfunction initNgModule(data) {\n    const def = data._def;\n    const providers = data._providers = newArray(def.providers.length);\n    for (let i = 0; i < def.providers.length; i++) {\n        const provDef = def.providers[i];\n        if (!(provDef.flags & 4096 /* LazyProvider */)) {\n            // Make sure the provider has not been already initialized outside this loop.\n            if (providers[i] === undefined) {\n                providers[i] = _createProviderInstance(data, provDef);\n            }\n        }\n    }\n}\nfunction resolveNgModuleDep(data, depDef, notFoundValue = Injector.THROW_IF_NOT_FOUND) {\n    const former = setCurrentInjector(data);\n    try {\n        if (depDef.flags & 8 /* Value */) {\n            return depDef.token;\n        }\n        if (depDef.flags & 2 /* Optional */) {\n            notFoundValue = null;\n        }\n        if (depDef.flags & 1 /* SkipSelf */) {\n            return data._parent.get(depDef.token, notFoundValue);\n        }\n        const tokenKey = depDef.tokenKey;\n        switch (tokenKey) {\n            case InjectorRefTokenKey:\n            case INJECTORRefTokenKey:\n            case NgModuleRefTokenKey:\n                return data;\n        }\n        const providerDef = data._def.providersByKey[tokenKey];\n        let injectableDef;\n        if (providerDef) {\n            let providerInstance = data._providers[providerDef.index];\n            if (providerInstance === undefined) {\n                providerInstance = data._providers[providerDef.index] =\n                    _createProviderInstance(data, providerDef);\n            }\n            return providerInstance === UNDEFINED_VALUE ? undefined : providerInstance;\n        }\n        else if ((injectableDef = getInjectableDef(depDef.token)) && targetsModule(data, injectableDef)) {\n            const index = data._providers.length;\n            data._def.providers[index] = data._def.providersByKey[depDef.tokenKey] = {\n                flags: 1024 /* TypeFactoryProvider */ | 4096 /* LazyProvider */,\n                value: injectableDef.factory,\n                deps: [],\n                index,\n                token: depDef.token,\n            };\n            data._providers[index] = UNDEFINED_VALUE;\n            return (data._providers[index] =\n                _createProviderInstance(data, data._def.providersByKey[depDef.tokenKey]));\n        }\n        else if (depDef.flags & 4 /* Self */) {\n            return notFoundValue;\n        }\n        return data._parent.get(depDef.token, notFoundValue);\n    }\n    finally {\n        setCurrentInjector(former);\n    }\n}\nfunction moduleTransitivelyPresent(ngModule, scope) {\n    return ngModule._def.modules.indexOf(scope) > -1;\n}\nfunction targetsModule(ngModule, def) {\n    const providedIn = def.providedIn;\n    return providedIn != null &&\n        (providedIn === 'any' || providedIn === ngModule._def.scope ||\n            moduleTransitivelyPresent(ngModule, providedIn));\n}\nfunction _createProviderInstance(ngModule, providerDef) {\n    let injectable;\n    switch (providerDef.flags & 201347067 /* Types */) {\n        case 512 /* TypeClassProvider */:\n            injectable = _createClass(ngModule, providerDef.value, providerDef.deps);\n            break;\n        case 1024 /* TypeFactoryProvider */:\n            injectable = _callFactory(ngModule, providerDef.value, providerDef.deps);\n            break;\n        case 2048 /* TypeUseExistingProvider */:\n            injectable = resolveNgModuleDep(ngModule, providerDef.deps[0]);\n            break;\n        case 256 /* TypeValueProvider */:\n            injectable = providerDef.value;\n            break;\n    }\n    // The read of `ngOnDestroy` here is slightly expensive as it's megamorphic, so it should be\n    // avoided if possible. The sequence of checks here determines whether ngOnDestroy needs to be\n    // checked. It might not if the `injectable` isn't an object or if NodeFlags.OnDestroy is already\n    // set (ngOnDestroy was detected statically).\n    if (injectable !== UNDEFINED_VALUE && injectable !== null && typeof injectable === 'object' &&\n        !(providerDef.flags & 131072 /* OnDestroy */) && typeof injectable.ngOnDestroy === 'function') {\n        providerDef.flags |= 131072 /* OnDestroy */;\n    }\n    return injectable === undefined ? UNDEFINED_VALUE : injectable;\n}\nfunction _createClass(ngModule, ctor, deps) {\n    const len = deps.length;\n    switch (len) {\n        case 0:\n            return new ctor();\n        case 1:\n            return new ctor(resolveNgModuleDep(ngModule, deps[0]));\n        case 2:\n            return new ctor(resolveNgModuleDep(ngModule, deps[0]), resolveNgModuleDep(ngModule, deps[1]));\n        case 3:\n            return new ctor(resolveNgModuleDep(ngModule, deps[0]), resolveNgModuleDep(ngModule, deps[1]), resolveNgModuleDep(ngModule, deps[2]));\n        default:\n            const depValues = [];\n            for (let i = 0; i < len; i++) {\n                depValues[i] = resolveNgModuleDep(ngModule, deps[i]);\n            }\n            return new ctor(...depValues);\n    }\n}\nfunction _callFactory(ngModule, factory, deps) {\n    const len = deps.length;\n    switch (len) {\n        case 0:\n            return factory();\n        case 1:\n            return factory(resolveNgModuleDep(ngModule, deps[0]));\n        case 2:\n            return factory(resolveNgModuleDep(ngModule, deps[0]), resolveNgModuleDep(ngModule, deps[1]));\n        case 3:\n            return factory(resolveNgModuleDep(ngModule, deps[0]), resolveNgModuleDep(ngModule, deps[1]), resolveNgModuleDep(ngModule, deps[2]));\n        default:\n            const depValues = [];\n            for (let i = 0; i < len; i++) {\n                depValues[i] = resolveNgModuleDep(ngModule, deps[i]);\n            }\n            return factory(...depValues);\n    }\n}\nfunction callNgModuleLifecycle(ngModule, lifecycles) {\n    const def = ngModule._def;\n    const destroyed = new Set();\n    for (let i = 0; i < def.providers.length; i++) {\n        const provDef = def.providers[i];\n        if (provDef.flags & 131072 /* OnDestroy */) {\n            const instance = ngModule._providers[i];\n            if (instance && instance !== UNDEFINED_VALUE) {\n                const onDestroy = instance.ngOnDestroy;\n                if (typeof onDestroy === 'function' && !destroyed.has(instance)) {\n                    onDestroy.apply(instance);\n                    destroyed.add(instance);\n                }\n            }\n        }\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction attachEmbeddedView(parentView, elementData, viewIndex, view) {\n    let embeddedViews = elementData.viewContainer._embeddedViews;\n    if (viewIndex === null || viewIndex === undefined) {\n        viewIndex = embeddedViews.length;\n    }\n    view.viewContainerParent = parentView;\n    addToArray(embeddedViews, viewIndex, view);\n    attachProjectedView(elementData, view);\n    Services.dirtyParentQueries(view);\n    const prevView = viewIndex > 0 ? embeddedViews[viewIndex - 1] : null;\n    renderAttachEmbeddedView(elementData, prevView, view);\n}\nfunction attachProjectedView(vcElementData, view) {\n    const dvcElementData = declaredViewContainer(view);\n    if (!dvcElementData || dvcElementData === vcElementData ||\n        view.state & 16 /* IsProjectedView */) {\n        return;\n    }\n    // Note: For performance reasons, we\n    // - add a view to template._projectedViews only 1x throughout its lifetime,\n    //   and remove it not until the view is destroyed.\n    //   (hard, as when a parent view is attached/detached we would need to attach/detach all\n    //    nested projected views as well, even across component boundaries).\n    // - don't track the insertion order of views in the projected views array\n    //   (hard, as when the views of the same template are inserted different view containers)\n    view.state |= 16 /* IsProjectedView */;\n    let projectedViews = dvcElementData.template._projectedViews;\n    if (!projectedViews) {\n        projectedViews = dvcElementData.template._projectedViews = [];\n    }\n    projectedViews.push(view);\n    // Note: we are changing the NodeDef here as we cannot calculate\n    // the fact whether a template is used for projection during compilation.\n    markNodeAsProjectedTemplate(view.parent.def, view.parentNodeDef);\n}\nfunction markNodeAsProjectedTemplate(viewDef, nodeDef) {\n    if (nodeDef.flags & 4 /* ProjectedTemplate */) {\n        return;\n    }\n    viewDef.nodeFlags |= 4 /* ProjectedTemplate */;\n    nodeDef.flags |= 4 /* ProjectedTemplate */;\n    let parentNodeDef = nodeDef.parent;\n    while (parentNodeDef) {\n        parentNodeDef.childFlags |= 4 /* ProjectedTemplate */;\n        parentNodeDef = parentNodeDef.parent;\n    }\n}\nfunction detachEmbeddedView(elementData, viewIndex) {\n    const embeddedViews = elementData.viewContainer._embeddedViews;\n    if (viewIndex == null || viewIndex >= embeddedViews.length) {\n        viewIndex = embeddedViews.length - 1;\n    }\n    if (viewIndex < 0) {\n        return null;\n    }\n    const view = embeddedViews[viewIndex];\n    view.viewContainerParent = null;\n    removeFromArray(embeddedViews, viewIndex);\n    // See attachProjectedView for why we don't update projectedViews here.\n    Services.dirtyParentQueries(view);\n    renderDetachView$1(view);\n    return view;\n}\nfunction detachProjectedView(view) {\n    if (!(view.state & 16 /* IsProjectedView */)) {\n        return;\n    }\n    const dvcElementData = declaredViewContainer(view);\n    if (dvcElementData) {\n        const projectedViews = dvcElementData.template._projectedViews;\n        if (projectedViews) {\n            removeFromArray(projectedViews, projectedViews.indexOf(view));\n            Services.dirtyParentQueries(view);\n        }\n    }\n}\nfunction moveEmbeddedView(elementData, oldViewIndex, newViewIndex) {\n    const embeddedViews = elementData.viewContainer._embeddedViews;\n    const view = embeddedViews[oldViewIndex];\n    removeFromArray(embeddedViews, oldViewIndex);\n    if (newViewIndex == null) {\n        newViewIndex = embeddedViews.length;\n    }\n    addToArray(embeddedViews, newViewIndex, view);\n    // Note: Don't need to change projectedViews as the order in there\n    // as always invalid...\n    Services.dirtyParentQueries(view);\n    renderDetachView$1(view);\n    const prevView = newViewIndex > 0 ? embeddedViews[newViewIndex - 1] : null;\n    renderAttachEmbeddedView(elementData, prevView, view);\n    return view;\n}\nfunction renderAttachEmbeddedView(elementData, prevView, view) {\n    const prevRenderNode = prevView ? renderNode(prevView, prevView.def.lastRenderRootNode) : elementData.renderElement;\n    const parentNode = view.renderer.parentNode(prevRenderNode);\n    const nextSibling = view.renderer.nextSibling(prevRenderNode);\n    // Note: We can't check if `nextSibling` is present, as on WebWorkers it will always be!\n    // However, browsers automatically do `appendChild` when there is no `nextSibling`.\n    visitRootRenderNodes(view, 2 /* InsertBefore */, parentNode, nextSibling, undefined);\n}\nfunction renderDetachView$1(view) {\n    visitRootRenderNodes(view, 3 /* RemoveChild */, null, null, undefined);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst EMPTY_CONTEXT = {};\n// Attention: this function is called as top level function.\n// Putting any logic in here will destroy closure tree shaking!\nfunction createComponentFactory(selector, componentType, viewDefFactory, inputs, outputs, ngContentSelectors) {\n    return new ComponentFactory_(selector, componentType, viewDefFactory, inputs, outputs, ngContentSelectors);\n}\nfunction getComponentViewDefinitionFactory(componentFactory) {\n    return componentFactory.viewDefFactory;\n}\nclass ComponentFactory_ extends ComponentFactory {\n    constructor(selector, componentType, viewDefFactory, _inputs, _outputs, ngContentSelectors) {\n        // Attention: this ctor is called as top level function.\n        // Putting any logic in here will destroy closure tree shaking!\n        super();\n        this.selector = selector;\n        this.componentType = componentType;\n        this._inputs = _inputs;\n        this._outputs = _outputs;\n        this.ngContentSelectors = ngContentSelectors;\n        this.viewDefFactory = viewDefFactory;\n    }\n    get inputs() {\n        const inputsArr = [];\n        const inputs = this._inputs;\n        for (let propName in inputs) {\n            const templateName = inputs[propName];\n            inputsArr.push({ propName, templateName });\n        }\n        return inputsArr;\n    }\n    get outputs() {\n        const outputsArr = [];\n        for (let propName in this._outputs) {\n            const templateName = this._outputs[propName];\n            outputsArr.push({ propName, templateName });\n        }\n        return outputsArr;\n    }\n    /**\n     * Creates a new component.\n     */\n    create(injector, projectableNodes, rootSelectorOrNode, ngModule) {\n        if (!ngModule) {\n            throw new Error('ngModule should be provided');\n        }\n        const viewDef = resolveDefinition(this.viewDefFactory);\n        const componentNodeIndex = viewDef.nodes[0].element.componentProvider.nodeIndex;\n        const view = Services.createRootView(injector, projectableNodes || [], rootSelectorOrNode, viewDef, ngModule, EMPTY_CONTEXT);\n        const component = asProviderData(view, componentNodeIndex).instance;\n        if (rootSelectorOrNode) {\n            view.renderer.setAttribute(asElementData(view, 0).renderElement, 'ng-version', VERSION.full);\n        }\n        return new ComponentRef_(view, new ViewRef_(view), component);\n    }\n}\nclass ComponentRef_ extends ComponentRef {\n    constructor(_view, _viewRef, _component) {\n        super();\n        this._view = _view;\n        this._viewRef = _viewRef;\n        this._component = _component;\n        this._elDef = this._view.def.nodes[0];\n        this.hostView = _viewRef;\n        this.changeDetectorRef = _viewRef;\n        this.instance = _component;\n    }\n    get location() {\n        return new ElementRef(asElementData(this._view, this._elDef.nodeIndex).renderElement);\n    }\n    get injector() {\n        return new Injector_(this._view, this._elDef);\n    }\n    get componentType() {\n        return this._component.constructor;\n    }\n    destroy() {\n        this._viewRef.destroy();\n    }\n    onDestroy(callback) {\n        this._viewRef.onDestroy(callback);\n    }\n}\nfunction createViewContainerData(view, elDef, elData) {\n    return new ViewContainerRef_(view, elDef, elData);\n}\nclass ViewContainerRef_ {\n    constructor(_view, _elDef, _data) {\n        this._view = _view;\n        this._elDef = _elDef;\n        this._data = _data;\n        /**\n         * @internal\n         */\n        this._embeddedViews = [];\n    }\n    get element() {\n        return new ElementRef(this._data.renderElement);\n    }\n    get injector() {\n        return new Injector_(this._view, this._elDef);\n    }\n    /** @deprecated No replacement */\n    get parentInjector() {\n        let view = this._view;\n        let elDef = this._elDef.parent;\n        while (!elDef && view) {\n            elDef = viewParentEl(view);\n            view = view.parent;\n        }\n        return view ? new Injector_(view, elDef) : new Injector_(this._view, null);\n    }\n    clear() {\n        const len = this._embeddedViews.length;\n        for (let i = len - 1; i >= 0; i--) {\n            const view = detachEmbeddedView(this._data, i);\n            Services.destroyView(view);\n        }\n    }\n    get(index) {\n        const view = this._embeddedViews[index];\n        if (view) {\n            const ref = new ViewRef_(view);\n            ref.attachToViewContainerRef(this);\n            return ref;\n        }\n        return null;\n    }\n    get length() {\n        return this._embeddedViews.length;\n    }\n    createEmbeddedView(templateRef, context, index) {\n        const viewRef = templateRef.createEmbeddedView(context || {});\n        this.insert(viewRef, index);\n        return viewRef;\n    }\n    createComponent(componentFactory, index, injector, projectableNodes, ngModuleRef) {\n        const contextInjector = injector || this.parentInjector;\n        if (!ngModuleRef && !(componentFactory instanceof ComponentFactoryBoundToModule)) {\n            ngModuleRef = contextInjector.get(NgModuleRef);\n        }\n        const componentRef = componentFactory.create(contextInjector, projectableNodes, undefined, ngModuleRef);\n        this.insert(componentRef.hostView, index);\n        return componentRef;\n    }\n    insert(viewRef, index) {\n        if (viewRef.destroyed) {\n            throw new Error('Cannot insert a destroyed View in a ViewContainer!');\n        }\n        const viewRef_ = viewRef;\n        const viewData = viewRef_._view;\n        attachEmbeddedView(this._view, this._data, index, viewData);\n        viewRef_.attachToViewContainerRef(this);\n        return viewRef;\n    }\n    move(viewRef, currentIndex) {\n        if (viewRef.destroyed) {\n            throw new Error('Cannot move a destroyed View in a ViewContainer!');\n        }\n        const previousIndex = this._embeddedViews.indexOf(viewRef._view);\n        moveEmbeddedView(this._data, previousIndex, currentIndex);\n        return viewRef;\n    }\n    indexOf(viewRef) {\n        return this._embeddedViews.indexOf(viewRef._view);\n    }\n    remove(index) {\n        const viewData = detachEmbeddedView(this._data, index);\n        if (viewData) {\n            Services.destroyView(viewData);\n        }\n    }\n    detach(index) {\n        const view = detachEmbeddedView(this._data, index);\n        return view ? new ViewRef_(view) : null;\n    }\n}\nfunction createChangeDetectorRef(view) {\n    return new ViewRef_(view);\n}\nclass ViewRef_ {\n    constructor(_view) {\n        this._view = _view;\n        this._viewContainerRef = null;\n        this._appRef = null;\n    }\n    get rootNodes() {\n        return rootRenderNodes(this._view);\n    }\n    get context() {\n        return this._view.context;\n    }\n    get destroyed() {\n        return (this._view.state & 128 /* Destroyed */) !== 0;\n    }\n    markForCheck() {\n        markParentViewsForCheck(this._view);\n    }\n    detach() {\n        this._view.state &= ~4 /* Attached */;\n    }\n    detectChanges() {\n        const fs = this._view.root.rendererFactory;\n        if (fs.begin) {\n            fs.begin();\n        }\n        try {\n            Services.checkAndUpdateView(this._view);\n        }\n        finally {\n            if (fs.end) {\n                fs.end();\n            }\n        }\n    }\n    checkNoChanges() {\n        Services.checkNoChangesView(this._view);\n    }\n    reattach() {\n        this._view.state |= 4 /* Attached */;\n    }\n    onDestroy(callback) {\n        if (!this._view.disposables) {\n            this._view.disposables = [];\n        }\n        this._view.disposables.push(callback);\n    }\n    destroy() {\n        if (this._appRef) {\n            this._appRef.detachView(this);\n        }\n        else if (this._viewContainerRef) {\n            this._viewContainerRef.detach(this._viewContainerRef.indexOf(this));\n        }\n        Services.destroyView(this._view);\n    }\n    detachFromAppRef() {\n        this._appRef = null;\n        renderDetachView$1(this._view);\n        Services.dirtyParentQueries(this._view);\n    }\n    attachToAppRef(appRef) {\n        if (this._viewContainerRef) {\n            throw new Error('This view is already attached to a ViewContainer!');\n        }\n        this._appRef = appRef;\n    }\n    attachToViewContainerRef(vcRef) {\n        if (this._appRef) {\n            throw new Error('This view is already attached directly to the ApplicationRef!');\n        }\n        this._viewContainerRef = vcRef;\n    }\n}\nfunction createTemplateData(view, def) {\n    return new TemplateRef_(view, def);\n}\nclass TemplateRef_ extends TemplateRef {\n    constructor(_parentView, _def) {\n        super();\n        this._parentView = _parentView;\n        this._def = _def;\n    }\n    createEmbeddedView(context) {\n        return new ViewRef_(Services.createEmbeddedView(this._parentView, this._def, this._def.element.template, context));\n    }\n    get elementRef() {\n        return new ElementRef(asElementData(this._parentView, this._def.nodeIndex).renderElement);\n    }\n}\nfunction createInjector$1(view, elDef) {\n    return new Injector_(view, elDef);\n}\nclass Injector_ {\n    constructor(view, elDef) {\n        this.view = view;\n        this.elDef = elDef;\n    }\n    get(token, notFoundValue = Injector.THROW_IF_NOT_FOUND) {\n        const allowPrivateServices = this.elDef ? (this.elDef.flags & 33554432 /* ComponentView */) !== 0 : false;\n        return Services.resolveDep(this.view, this.elDef, allowPrivateServices, { flags: 0 /* None */, token, tokenKey: tokenKey(token) }, notFoundValue);\n    }\n}\nfunction nodeValue(view, index) {\n    const def = view.def.nodes[index];\n    if (def.flags & 1 /* TypeElement */) {\n        const elData = asElementData(view, def.nodeIndex);\n        return def.element.template ? elData.template : elData.renderElement;\n    }\n    else if (def.flags & 2 /* TypeText */) {\n        return asTextData(view, def.nodeIndex).renderText;\n    }\n    else if (def.flags & (20224 /* CatProvider */ | 16 /* TypePipe */)) {\n        return asProviderData(view, def.nodeIndex).instance;\n    }\n    throw new Error(`Illegal state: read nodeValue for node index ${index}`);\n}\nfunction createNgModuleRef(moduleType, parent, bootstrapComponents, def) {\n    return new NgModuleRef_(moduleType, parent, bootstrapComponents, def);\n}\nclass NgModuleRef_ {\n    constructor(_moduleType, _parent, _bootstrapComponents, _def) {\n        this._moduleType = _moduleType;\n        this._parent = _parent;\n        this._bootstrapComponents = _bootstrapComponents;\n        this._def = _def;\n        this._destroyListeners = [];\n        this._destroyed = false;\n        this.injector = this;\n        initNgModule(this);\n    }\n    get(token, notFoundValue = Injector.THROW_IF_NOT_FOUND, injectFlags = InjectFlags.Default) {\n        let flags = 0 /* None */;\n        if (injectFlags & InjectFlags.SkipSelf) {\n            flags |= 1 /* SkipSelf */;\n        }\n        else if (injectFlags & InjectFlags.Self) {\n            flags |= 4 /* Self */;\n        }\n        return resolveNgModuleDep(this, { token: token, tokenKey: tokenKey(token), flags: flags }, notFoundValue);\n    }\n    get instance() {\n        return this.get(this._moduleType);\n    }\n    get componentFactoryResolver() {\n        return this.get(ComponentFactoryResolver);\n    }\n    destroy() {\n        if (this._destroyed) {\n            throw new Error(`The ng module ${stringify(this.instance.constructor)} has already been destroyed.`);\n        }\n        this._destroyed = true;\n        callNgModuleLifecycle(this, 131072 /* OnDestroy */);\n        this._destroyListeners.forEach((listener) => listener());\n    }\n    onDestroy(callback) {\n        this._destroyListeners.push(callback);\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst Renderer2TokenKey = tokenKey(Renderer2);\nconst ElementRefTokenKey = tokenKey(ElementRef);\nconst ViewContainerRefTokenKey = tokenKey(ViewContainerRef);\nconst TemplateRefTokenKey = tokenKey(TemplateRef);\nconst ChangeDetectorRefTokenKey = tokenKey(ChangeDetectorRef);\nconst InjectorRefTokenKey$1 = tokenKey(Injector);\nconst INJECTORRefTokenKey$1 = tokenKey(INJECTOR);\nfunction directiveDef(checkIndex, flags, matchedQueries, childCount, ctor, deps, props, outputs) {\n    const bindings = [];\n    if (props) {\n        for (let prop in props) {\n            const [bindingIndex, nonMinifiedName] = props[prop];\n            bindings[bindingIndex] = {\n                flags: 8 /* TypeProperty */,\n                name: prop,\n                nonMinifiedName,\n                ns: null,\n                securityContext: null,\n                suffix: null\n            };\n        }\n    }\n    const outputDefs = [];\n    if (outputs) {\n        for (let propName in outputs) {\n            outputDefs.push({ type: 1 /* DirectiveOutput */, propName, target: null, eventName: outputs[propName] });\n        }\n    }\n    flags |= 16384 /* TypeDirective */;\n    return _def(checkIndex, flags, matchedQueries, childCount, ctor, ctor, deps, bindings, outputDefs);\n}\nfunction pipeDef(flags, ctor, deps) {\n    flags |= 16 /* TypePipe */;\n    return _def(-1, flags, null, 0, ctor, ctor, deps);\n}\nfunction providerDef(flags, matchedQueries, token, value, deps) {\n    return _def(-1, flags, matchedQueries, 0, token, value, deps);\n}\nfunction _def(checkIndex, flags, matchedQueriesDsl, childCount, token, value, deps, bindings, outputs) {\n    const { matchedQueries, references, matchedQueryIds } = splitMatchedQueriesDsl(matchedQueriesDsl);\n    if (!outputs) {\n        outputs = [];\n    }\n    if (!bindings) {\n        bindings = [];\n    }\n    // Need to resolve forwardRefs as e.g. for `useValue` we\n    // lowered the expression and then stopped evaluating it,\n    // i.e. also didn't unwrap it.\n    value = resolveForwardRef(value);\n    const depDefs = splitDepsDsl(deps, stringify(token));\n    return {\n        // will bet set by the view definition\n        nodeIndex: -1,\n        parent: null,\n        renderParent: null,\n        bindingIndex: -1,\n        outputIndex: -1,\n        // regular values\n        checkIndex,\n        flags,\n        childFlags: 0,\n        directChildFlags: 0,\n        childMatchedQueries: 0,\n        matchedQueries,\n        matchedQueryIds,\n        references,\n        ngContentIndex: -1,\n        childCount,\n        bindings,\n        bindingFlags: calcBindingFlags(bindings),\n        outputs,\n        element: null,\n        provider: { token, value, deps: depDefs },\n        text: null,\n        query: null,\n        ngContent: null\n    };\n}\nfunction createProviderInstance(view, def) {\n    return _createProviderInstance$1(view, def);\n}\nfunction createPipeInstance(view, def) {\n    // deps are looked up from component.\n    let compView = view;\n    while (compView.parent && !isComponentView(compView)) {\n        compView = compView.parent;\n    }\n    // pipes can see the private services of the component\n    const allowPrivateServices = true;\n    // pipes are always eager and classes!\n    return createClass(compView.parent, viewParentEl(compView), allowPrivateServices, def.provider.value, def.provider.deps);\n}\nfunction createDirectiveInstance(view, def) {\n    // components can see other private services, other directives can't.\n    const allowPrivateServices = (def.flags & 32768 /* Component */) > 0;\n    // directives are always eager and classes!\n    const instance = createClass(view, def.parent, allowPrivateServices, def.provider.value, def.provider.deps);\n    if (def.outputs.length) {\n        for (let i = 0; i < def.outputs.length; i++) {\n            const output = def.outputs[i];\n            const outputObservable = instance[output.propName];\n            if (isObservable(outputObservable)) {\n                const subscription = outputObservable.subscribe(eventHandlerClosure(view, def.parent.nodeIndex, output.eventName));\n                view.disposables[def.outputIndex + i] = subscription.unsubscribe.bind(subscription);\n            }\n            else {\n                throw new Error(`@Output ${output.propName} not initialized in '${instance.constructor.name}'.`);\n            }\n        }\n    }\n    return instance;\n}\nfunction eventHandlerClosure(view, index, eventName) {\n    return (event) => dispatchEvent(view, index, eventName, event);\n}\nfunction checkAndUpdateDirectiveInline(view, def, v0, v1, v2, v3, v4, v5, v6, v7, v8, v9) {\n    const providerData = asProviderData(view, def.nodeIndex);\n    const directive = providerData.instance;\n    let changed = false;\n    let changes = undefined;\n    const bindLen = def.bindings.length;\n    if (bindLen > 0 && checkBinding(view, def, 0, v0)) {\n        changed = true;\n        changes = updateProp(view, providerData, def, 0, v0, changes);\n    }\n    if (bindLen > 1 && checkBinding(view, def, 1, v1)) {\n        changed = true;\n        changes = updateProp(view, providerData, def, 1, v1, changes);\n    }\n    if (bindLen > 2 && checkBinding(view, def, 2, v2)) {\n        changed = true;\n        changes = updateProp(view, providerData, def, 2, v2, changes);\n    }\n    if (bindLen > 3 && checkBinding(view, def, 3, v3)) {\n        changed = true;\n        changes = updateProp(view, providerData, def, 3, v3, changes);\n    }\n    if (bindLen > 4 && checkBinding(view, def, 4, v4)) {\n        changed = true;\n        changes = updateProp(view, providerData, def, 4, v4, changes);\n    }\n    if (bindLen > 5 && checkBinding(view, def, 5, v5)) {\n        changed = true;\n        changes = updateProp(view, providerData, def, 5, v5, changes);\n    }\n    if (bindLen > 6 && checkBinding(view, def, 6, v6)) {\n        changed = true;\n        changes = updateProp(view, providerData, def, 6, v6, changes);\n    }\n    if (bindLen > 7 && checkBinding(view, def, 7, v7)) {\n        changed = true;\n        changes = updateProp(view, providerData, def, 7, v7, changes);\n    }\n    if (bindLen > 8 && checkBinding(view, def, 8, v8)) {\n        changed = true;\n        changes = updateProp(view, providerData, def, 8, v8, changes);\n    }\n    if (bindLen > 9 && checkBinding(view, def, 9, v9)) {\n        changed = true;\n        changes = updateProp(view, providerData, def, 9, v9, changes);\n    }\n    if (changes) {\n        directive.ngOnChanges(changes);\n    }\n    if ((def.flags & 65536 /* OnInit */) &&\n        shouldCallLifecycleInitHook(view, 256 /* InitState_CallingOnInit */, def.nodeIndex)) {\n        directive.ngOnInit();\n    }\n    if (def.flags & 262144 /* DoCheck */) {\n        directive.ngDoCheck();\n    }\n    return changed;\n}\nfunction checkAndUpdateDirectiveDynamic(view, def, values) {\n    const providerData = asProviderData(view, def.nodeIndex);\n    const directive = providerData.instance;\n    let changed = false;\n    let changes = undefined;\n    for (let i = 0; i < values.length; i++) {\n        if (checkBinding(view, def, i, values[i])) {\n            changed = true;\n            changes = updateProp(view, providerData, def, i, values[i], changes);\n        }\n    }\n    if (changes) {\n        directive.ngOnChanges(changes);\n    }\n    if ((def.flags & 65536 /* OnInit */) &&\n        shouldCallLifecycleInitHook(view, 256 /* InitState_CallingOnInit */, def.nodeIndex)) {\n        directive.ngOnInit();\n    }\n    if (def.flags & 262144 /* DoCheck */) {\n        directive.ngDoCheck();\n    }\n    return changed;\n}\nfunction _createProviderInstance$1(view, def) {\n    // private services can see other private services\n    const allowPrivateServices = (def.flags & 8192 /* PrivateProvider */) > 0;\n    const providerDef = def.provider;\n    switch (def.flags & 201347067 /* Types */) {\n        case 512 /* TypeClassProvider */:\n            return createClass(view, def.parent, allowPrivateServices, providerDef.value, providerDef.deps);\n        case 1024 /* TypeFactoryProvider */:\n            return callFactory(view, def.parent, allowPrivateServices, providerDef.value, providerDef.deps);\n        case 2048 /* TypeUseExistingProvider */:\n            return resolveDep(view, def.parent, allowPrivateServices, providerDef.deps[0]);\n        case 256 /* TypeValueProvider */:\n            return providerDef.value;\n    }\n}\nfunction createClass(view, elDef, allowPrivateServices, ctor, deps) {\n    const len = deps.length;\n    switch (len) {\n        case 0:\n            return new ctor();\n        case 1:\n            return new ctor(resolveDep(view, elDef, allowPrivateServices, deps[0]));\n        case 2:\n            return new ctor(resolveDep(view, elDef, allowPrivateServices, deps[0]), resolveDep(view, elDef, allowPrivateServices, deps[1]));\n        case 3:\n            return new ctor(resolveDep(view, elDef, allowPrivateServices, deps[0]), resolveDep(view, elDef, allowPrivateServices, deps[1]), resolveDep(view, elDef, allowPrivateServices, deps[2]));\n        default:\n            const depValues = [];\n            for (let i = 0; i < len; i++) {\n                depValues.push(resolveDep(view, elDef, allowPrivateServices, deps[i]));\n            }\n            return new ctor(...depValues);\n    }\n}\nfunction callFactory(view, elDef, allowPrivateServices, factory, deps) {\n    const len = deps.length;\n    switch (len) {\n        case 0:\n            return factory();\n        case 1:\n            return factory(resolveDep(view, elDef, allowPrivateServices, deps[0]));\n        case 2:\n            return factory(resolveDep(view, elDef, allowPrivateServices, deps[0]), resolveDep(view, elDef, allowPrivateServices, deps[1]));\n        case 3:\n            return factory(resolveDep(view, elDef, allowPrivateServices, deps[0]), resolveDep(view, elDef, allowPrivateServices, deps[1]), resolveDep(view, elDef, allowPrivateServices, deps[2]));\n        default:\n            const depValues = [];\n            for (let i = 0; i < len; i++) {\n                depValues.push(resolveDep(view, elDef, allowPrivateServices, deps[i]));\n            }\n            return factory(...depValues);\n    }\n}\n// This default value is when checking the hierarchy for a token.\n//\n// It means both:\n// - the token is not provided by the current injector,\n// - only the element injectors should be checked (ie do not check module injectors\n//\n//          mod1\n//         /\n//       el1   mod2\n//         \\  /\n//         el2\n//\n// When requesting el2.injector.get(token), we should check in the following order and return the\n// first found value:\n// - el2.injector.get(token, default)\n// - el1.injector.get(token, NOT_FOUND_CHECK_ONLY_ELEMENT_INJECTOR) -> do not check the module\n// - mod2.injector.get(token, default)\nconst NOT_FOUND_CHECK_ONLY_ELEMENT_INJECTOR = {};\nfunction resolveDep(view, elDef, allowPrivateServices, depDef, notFoundValue = Injector.THROW_IF_NOT_FOUND) {\n    if (depDef.flags & 8 /* Value */) {\n        return depDef.token;\n    }\n    const startView = view;\n    if (depDef.flags & 2 /* Optional */) {\n        notFoundValue = null;\n    }\n    const tokenKey = depDef.tokenKey;\n    if (tokenKey === ChangeDetectorRefTokenKey) {\n        // directives on the same element as a component should be able to control the change detector\n        // of that component as well.\n        allowPrivateServices = !!(elDef && elDef.element.componentView);\n    }\n    if (elDef && (depDef.flags & 1 /* SkipSelf */)) {\n        allowPrivateServices = false;\n        elDef = elDef.parent;\n    }\n    let searchView = view;\n    while (searchView) {\n        if (elDef) {\n            switch (tokenKey) {\n                case Renderer2TokenKey: {\n                    const compView = findCompView(searchView, elDef, allowPrivateServices);\n                    return compView.renderer;\n                }\n                case ElementRefTokenKey:\n                    return new ElementRef(asElementData(searchView, elDef.nodeIndex).renderElement);\n                case ViewContainerRefTokenKey:\n                    return asElementData(searchView, elDef.nodeIndex).viewContainer;\n                case TemplateRefTokenKey: {\n                    if (elDef.element.template) {\n                        return asElementData(searchView, elDef.nodeIndex).template;\n                    }\n                    break;\n                }\n                case ChangeDetectorRefTokenKey: {\n                    let cdView = findCompView(searchView, elDef, allowPrivateServices);\n                    return createChangeDetectorRef(cdView);\n                }\n                case InjectorRefTokenKey$1:\n                case INJECTORRefTokenKey$1:\n                    return createInjector$1(searchView, elDef);\n                default:\n                    const providerDef = (allowPrivateServices ? elDef.element.allProviders :\n                        elDef.element.publicProviders)[tokenKey];\n                    if (providerDef) {\n                        let providerData = asProviderData(searchView, providerDef.nodeIndex);\n                        if (!providerData) {\n                            providerData = { instance: _createProviderInstance$1(searchView, providerDef) };\n                            searchView.nodes[providerDef.nodeIndex] = providerData;\n                        }\n                        return providerData.instance;\n                    }\n            }\n        }\n        allowPrivateServices = isComponentView(searchView);\n        elDef = viewParentEl(searchView);\n        searchView = searchView.parent;\n        if (depDef.flags & 4 /* Self */) {\n            searchView = null;\n        }\n    }\n    const value = startView.root.injector.get(depDef.token, NOT_FOUND_CHECK_ONLY_ELEMENT_INJECTOR);\n    if (value !== NOT_FOUND_CHECK_ONLY_ELEMENT_INJECTOR ||\n        notFoundValue === NOT_FOUND_CHECK_ONLY_ELEMENT_INJECTOR) {\n        // Return the value from the root element injector when\n        // - it provides it\n        //   (value !== NOT_FOUND_CHECK_ONLY_ELEMENT_INJECTOR)\n        // - the module injector should not be checked\n        //   (notFoundValue === NOT_FOUND_CHECK_ONLY_ELEMENT_INJECTOR)\n        return value;\n    }\n    return startView.root.ngModule.injector.get(depDef.token, notFoundValue);\n}\nfunction findCompView(view, elDef, allowPrivateServices) {\n    let compView;\n    if (allowPrivateServices) {\n        compView = asElementData(view, elDef.nodeIndex).componentView;\n    }\n    else {\n        compView = view;\n        while (compView.parent && !isComponentView(compView)) {\n            compView = compView.parent;\n        }\n    }\n    return compView;\n}\nfunction updateProp(view, providerData, def, bindingIdx, value, changes) {\n    if (def.flags & 32768 /* Component */) {\n        const compView = asElementData(view, def.parent.nodeIndex).componentView;\n        if (compView.def.flags & 2 /* OnPush */) {\n            compView.state |= 8 /* ChecksEnabled */;\n        }\n    }\n    const binding = def.bindings[bindingIdx];\n    const propName = binding.name;\n    // Note: This is still safe with Closure Compiler as\n    // the user passed in the property name as an object has to `providerDef`,\n    // so Closure Compiler will have renamed the property correctly already.\n    providerData.instance[propName] = value;\n    if (def.flags & 524288 /* OnChanges */) {\n        changes = changes || {};\n        const oldValue = WrappedValue.unwrap(view.oldValues[def.bindingIndex + bindingIdx]);\n        const binding = def.bindings[bindingIdx];\n        changes[binding.nonMinifiedName] =\n            new SimpleChange(oldValue, value, (view.state & 2 /* FirstCheck */) !== 0);\n    }\n    view.oldValues[def.bindingIndex + bindingIdx] = value;\n    return changes;\n}\n// This function calls the ngAfterContentCheck, ngAfterContentInit,\n// ngAfterViewCheck, and ngAfterViewInit lifecycle hooks (depending on the node\n// flags in lifecycle). Unlike ngDoCheck, ngOnChanges and ngOnInit, which are\n// called during a pre-order traversal of the view tree (that is calling the\n// parent hooks before the child hooks) these events are sent in using a\n// post-order traversal of the tree (children before parents). This changes the\n// meaning of initIndex in the view state. For ngOnInit, initIndex tracks the\n// expected nodeIndex which a ngOnInit should be called. When sending\n// ngAfterContentInit and ngAfterViewInit it is the expected count of\n// ngAfterContentInit or ngAfterViewInit methods that have been called. This\n// ensure that despite being called recursively or after picking up after an\n// exception, the ngAfterContentInit or ngAfterViewInit will be called on the\n// correct nodes. Consider for example, the following (where E is an element\n// and D is a directive)\n//  Tree:       pre-order index  post-order index\n//    E1        0                6\n//      E2      1                1\n//       D3     2                0\n//      E4      3                5\n//       E5     4                4\n//        E6    5                2\n//        E7    6                3\n// As can be seen, the post-order index has an unclear relationship to the\n// pre-order index (postOrderIndex === preOrderIndex - parentCount +\n// childCount). Since number of calls to ngAfterContentInit and ngAfterViewInit\n// are stable (will be the same for the same view regardless of exceptions or\n// recursion) we just need to count them which will roughly correspond to the\n// post-order index (it skips elements and directives that do not have\n// lifecycle hooks).\n//\n// For example, if an exception is raised in the E6.onAfterViewInit() the\n// initIndex is left at 3 (by shouldCallLifecycleInitHook() which set it to\n// initIndex + 1). When checkAndUpdateView() is called again D3, E2 and E6 will\n// not have their ngAfterViewInit() called but, starting with E7, the rest of\n// the view will begin getting ngAfterViewInit() called until a check and\n// pass is complete.\n//\n// This algorthim also handles recursion. Consider if E4's ngAfterViewInit()\n// indirectly calls E1's ChangeDetectorRef.detectChanges(). The expected\n// initIndex is set to 6, the recusive checkAndUpdateView() starts walk again.\n// D3, E2, E6, E7, E5 and E4 are skipped, ngAfterViewInit() is called on E1.\n// When the recursion returns the initIndex will be 7 so E1 is skipped as it\n// has already been called in the recursively called checkAnUpdateView().\nfunction callLifecycleHooksChildrenFirst(view, lifecycles) {\n    if (!(view.def.nodeFlags & lifecycles)) {\n        return;\n    }\n    const nodes = view.def.nodes;\n    let initIndex = 0;\n    for (let i = 0; i < nodes.length; i++) {\n        const nodeDef = nodes[i];\n        let parent = nodeDef.parent;\n        if (!parent && nodeDef.flags & lifecycles) {\n            // matching root node (e.g. a pipe)\n            callProviderLifecycles(view, i, nodeDef.flags & lifecycles, initIndex++);\n        }\n        if ((nodeDef.childFlags & lifecycles) === 0) {\n            // no child matches one of the lifecycles\n            i += nodeDef.childCount;\n        }\n        while (parent && (parent.flags & 1 /* TypeElement */) &&\n            i === parent.nodeIndex + parent.childCount) {\n            // last child of an element\n            if (parent.directChildFlags & lifecycles) {\n                initIndex = callElementProvidersLifecycles(view, parent, lifecycles, initIndex);\n            }\n            parent = parent.parent;\n        }\n    }\n}\nfunction callElementProvidersLifecycles(view, elDef, lifecycles, initIndex) {\n    for (let i = elDef.nodeIndex + 1; i <= elDef.nodeIndex + elDef.childCount; i++) {\n        const nodeDef = view.def.nodes[i];\n        if (nodeDef.flags & lifecycles) {\n            callProviderLifecycles(view, i, nodeDef.flags & lifecycles, initIndex++);\n        }\n        // only visit direct children\n        i += nodeDef.childCount;\n    }\n    return initIndex;\n}\nfunction callProviderLifecycles(view, index, lifecycles, initIndex) {\n    const providerData = asProviderData(view, index);\n    if (!providerData) {\n        return;\n    }\n    const provider = providerData.instance;\n    if (!provider) {\n        return;\n    }\n    Services.setCurrentNode(view, index);\n    if (lifecycles & 1048576 /* AfterContentInit */ &&\n        shouldCallLifecycleInitHook(view, 512 /* InitState_CallingAfterContentInit */, initIndex)) {\n        provider.ngAfterContentInit();\n    }\n    if (lifecycles & 2097152 /* AfterContentChecked */) {\n        provider.ngAfterContentChecked();\n    }\n    if (lifecycles & 4194304 /* AfterViewInit */ &&\n        shouldCallLifecycleInitHook(view, 768 /* InitState_CallingAfterViewInit */, initIndex)) {\n        provider.ngAfterViewInit();\n    }\n    if (lifecycles & 8388608 /* AfterViewChecked */) {\n        provider.ngAfterViewChecked();\n    }\n    if (lifecycles & 131072 /* OnDestroy */) {\n        provider.ngOnDestroy();\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass ComponentFactoryResolver$1 extends ComponentFactoryResolver {\n    /**\n     * @param ngModule The NgModuleRef to which all resolved factories are bound.\n     */\n    constructor(ngModule) {\n        super();\n        this.ngModule = ngModule;\n    }\n    resolveComponentFactory(component) {\n        ngDevMode && assertComponentType(component);\n        const componentDef = getComponentDef(component);\n        return new ComponentFactory$1(componentDef, this.ngModule);\n    }\n}\nfunction toRefArray(map) {\n    const array = [];\n    for (let nonMinified in map) {\n        if (map.hasOwnProperty(nonMinified)) {\n            const minified = map[nonMinified];\n            array.push({ propName: minified, templateName: nonMinified });\n        }\n    }\n    return array;\n}\nfunction getNamespace$1(elementName) {\n    const name = elementName.toLowerCase();\n    return name === 'svg' ? SVG_NAMESPACE : (name === 'math' ? MATH_ML_NAMESPACE : null);\n}\n/**\n * A change detection scheduler token for {@link RootContext}. This token is the default value used\n * for the default `RootContext` found in the {@link ROOT_CONTEXT} token.\n */\nconst SCHEDULER = new InjectionToken('SCHEDULER_TOKEN', {\n    providedIn: 'root',\n    factory: () => defaultScheduler,\n});\nfunction createChainedInjector(rootViewInjector, moduleInjector) {\n    return {\n        get: (token, notFoundValue, flags) => {\n            const value = rootViewInjector.get(token, NOT_FOUND_CHECK_ONLY_ELEMENT_INJECTOR, flags);\n            if (value !== NOT_FOUND_CHECK_ONLY_ELEMENT_INJECTOR ||\n                notFoundValue === NOT_FOUND_CHECK_ONLY_ELEMENT_INJECTOR) {\n                // Return the value from the root element injector when\n                // - it provides it\n                //   (value !== NOT_FOUND_CHECK_ONLY_ELEMENT_INJECTOR)\n                // - the module injector should not be checked\n                //   (notFoundValue === NOT_FOUND_CHECK_ONLY_ELEMENT_INJECTOR)\n                return value;\n            }\n            return moduleInjector.get(token, notFoundValue, flags);\n        }\n    };\n}\n/**\n * Render3 implementation of {@link viewEngine_ComponentFactory}.\n */\nclass ComponentFactory$1 extends ComponentFactory {\n    /**\n     * @param componentDef The component definition.\n     * @param ngModule The NgModuleRef to which the factory is bound.\n     */\n    constructor(componentDef, ngModule) {\n        super();\n        this.componentDef = componentDef;\n        this.ngModule = ngModule;\n        this.componentType = componentDef.type;\n        this.selector = stringifyCSSSelectorList(componentDef.selectors);\n        this.ngContentSelectors =\n            componentDef.ngContentSelectors ? componentDef.ngContentSelectors : [];\n        this.isBoundToModule = !!ngModule;\n    }\n    get inputs() {\n        return toRefArray(this.componentDef.inputs);\n    }\n    get outputs() {\n        return toRefArray(this.componentDef.outputs);\n    }\n    create(injector, projectableNodes, rootSelectorOrNode, ngModule) {\n        ngModule = ngModule || this.ngModule;\n        const rootViewInjector = ngModule ? createChainedInjector(injector, ngModule.injector) : injector;\n        const rendererFactory = rootViewInjector.get(RendererFactory2, domRendererFactory3);\n        const sanitizer = rootViewInjector.get(Sanitizer, null);\n        const hostRenderer = rendererFactory.createRenderer(null, this.componentDef);\n        // Determine a tag name used for creating host elements when this component is created\n        // dynamically. Default to 'div' if this component did not specify any tag name in its selector.\n        const elementName = this.componentDef.selectors[0][0] || 'div';\n        const hostRNode = rootSelectorOrNode ?\n            locateHostElement(hostRenderer, rootSelectorOrNode, this.componentDef.encapsulation) :\n            elementCreate(elementName, rendererFactory.createRenderer(null, this.componentDef), getNamespace$1(elementName));\n        const rootFlags = this.componentDef.onPush ? 64 /* Dirty */ | 512 /* IsRoot */ :\n            16 /* CheckAlways */ | 512 /* IsRoot */;\n        const rootContext = createRootContext();\n        // Create the root view. Uses empty TView and ContentTemplate.\n        const rootTView = createTView(0 /* Root */, -1, null, 1, 0, null, null, null, null, null);\n        const rootLView = createLView(null, rootTView, rootContext, rootFlags, null, null, rendererFactory, hostRenderer, sanitizer, rootViewInjector);\n        // rootView is the parent when bootstrapping\n        // TODO(misko): it looks like we are entering view here but we don't really need to as\n        // `renderView` does that. However as the code is written it is needed because\n        // `createRootComponentView` and `createRootComponent` both read global state. Fixing those\n        // issues would allow us to drop this.\n        enterView(rootLView, null);\n        let component;\n        let tElementNode;\n        try {\n            const componentView = createRootComponentView(hostRNode, this.componentDef, rootLView, rendererFactory, hostRenderer);\n            if (hostRNode) {\n                if (rootSelectorOrNode) {\n                    setUpAttributes(hostRenderer, hostRNode, ['ng-version', VERSION.full]);\n                }\n                else {\n                    // If host element is created as a part of this function call (i.e. `rootSelectorOrNode`\n                    // is not defined), also apply attributes and classes extracted from component selector.\n                    // Extract attributes and classes from the first selector only to match VE behavior.\n                    const { attrs, classes } = extractAttrsAndClassesFromSelector(this.componentDef.selectors[0]);\n                    if (attrs) {\n                        setUpAttributes(hostRenderer, hostRNode, attrs);\n                    }\n                    if (classes && classes.length > 0) {\n                        writeDirectClass(hostRenderer, hostRNode, classes.join(' '));\n                    }\n                }\n            }\n            tElementNode = getTNode(rootTView, 0);\n            if (projectableNodes !== undefined) {\n                const projection = tElementNode.projection = [];\n                for (let i = 0; i < this.ngContentSelectors.length; i++) {\n                    const nodesforSlot = projectableNodes[i];\n                    // Projectable nodes can be passed as array of arrays or an array of iterables (ngUpgrade\n                    // case). Here we do normalize passed data structure to be an array of arrays to avoid\n                    // complex checks down the line.\n                    // We also normalize the length of the passed in projectable nodes (to match the number of\n                    // <ng-container> slots defined by a component).\n                    projection.push(nodesforSlot != null ? Array.from(nodesforSlot) : null);\n                }\n            }\n            // TODO: should LifecycleHooksFeature and other host features be generated by the compiler and\n            // executed here?\n            // Angular 5 reference: https://stackblitz.com/edit/lifecycle-hooks-vcref\n            component = createRootComponent(componentView, this.componentDef, rootLView, rootContext, [LifecycleHooksFeature]);\n            renderView(rootTView, rootLView, null);\n        }\n        finally {\n            leaveView();\n        }\n        const componentRef = new ComponentRef$1(this.componentType, component, createElementRef(ElementRef, tElementNode, rootLView), rootLView, tElementNode);\n        // The host element of the internal root view is attached to the component's host view node.\n        ngDevMode && assertNodeOfPossibleTypes(rootTView.node, [2 /* View */]);\n        rootTView.node.child = tElementNode;\n        return componentRef;\n    }\n}\nconst componentFactoryResolver = new ComponentFactoryResolver$1();\n/**\n * Creates a ComponentFactoryResolver and stores it on the injector. Or, if the\n * ComponentFactoryResolver\n * already exists, retrieves the existing ComponentFactoryResolver.\n *\n * @returns The ComponentFactoryResolver instance to use\n */\nfunction injectComponentFactoryResolver() {\n    return componentFactoryResolver;\n}\n/**\n * Represents an instance of a Component created via a {@link ComponentFactory}.\n *\n * `ComponentRef` provides access to the Component Instance as well other objects related to this\n * Component Instance and allows you to destroy the Component Instance via the {@link #destroy}\n * method.\n *\n */\nclass ComponentRef$1 extends ComponentRef {\n    constructor(componentType, instance, location, _rootLView, _tNode) {\n        super();\n        this.location = location;\n        this._rootLView = _rootLView;\n        this._tNode = _tNode;\n        this.destroyCbs = [];\n        this.instance = instance;\n        this.hostView = this.changeDetectorRef = new RootViewRef(_rootLView);\n        assignTViewNodeToLView(_rootLView[TVIEW], null, -1, _rootLView);\n        this.componentType = componentType;\n    }\n    get injector() {\n        return new NodeInjector(this._tNode, this._rootLView);\n    }\n    destroy() {\n        if (this.destroyCbs) {\n            this.destroyCbs.forEach(fn => fn());\n            this.destroyCbs = null;\n            !this.hostView.destroyed && this.hostView.destroy();\n        }\n    }\n    onDestroy(callback) {\n        if (this.destroyCbs) {\n            this.destroyCbs.push(callback);\n        }\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// THIS CODE IS GENERATED - DO NOT MODIFY\n// See angular/tools/gulp-tasks/cldr/extract.js\nconst u = undefined;\nfunction plural(n) {\n    let i = Math.floor(Math.abs(n)), v = n.toString().replace(/^[^.]*\\.?/, '').length;\n    if (i === 1 && v === 0)\n        return 1;\n    return 5;\n}\nvar localeEn = [\n    'en',\n    [['a', 'p'], ['AM', 'PM'], u],\n    [['AM', 'PM'], u, u],\n    [\n        ['S', 'M', 'T', 'W', 'T', 'F', 'S'], ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],\n        ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],\n        ['Su', 'Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa']\n    ],\n    u,\n    [\n        ['J', 'F', 'M', 'A', 'M', 'J', 'J', 'A', 'S', 'O', 'N', 'D'],\n        ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],\n        [\n            'January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September',\n            'October', 'November', 'December'\n        ]\n    ],\n    u,\n    [['B', 'A'], ['BC', 'AD'], ['Before Christ', 'Anno Domini']],\n    0,\n    [6, 0],\n    ['M/d/yy', 'MMM d, y', 'MMMM d, y', 'EEEE, MMMM d, y'],\n    ['h:mm a', 'h:mm:ss a', 'h:mm:ss a z', 'h:mm:ss a zzzz'],\n    ['{1}, {0}', u, '{1} \\'at\\' {0}', u],\n    ['.', ',', ';', '%', '+', '-', 'E', '×', '‰', '∞', 'NaN', ':'],\n    ['#,##0.###', '#,##0%', '¤#,##0.00', '#E0'],\n    'USD',\n    '$',\n    'US Dollar',\n    {},\n    'ltr',\n    plural\n];\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * This const is used to store the locale data registered with `registerLocaleData`\n */\nlet LOCALE_DATA = {};\n/**\n * Register locale data to be used internally by Angular. See the\n * [\"I18n guide\"](guide/i18n#i18n-pipes) to know how to import additional locale data.\n *\n * The signature `registerLocaleData(data: any, extraData?: any)` is deprecated since v5.1\n */\nfunction registerLocaleData(data, localeId, extraData) {\n    if (typeof localeId !== 'string') {\n        extraData = localeId;\n        localeId = data[LocaleDataIndex.LocaleId];\n    }\n    localeId = localeId.toLowerCase().replace(/_/g, '-');\n    LOCALE_DATA[localeId] = data;\n    if (extraData) {\n        LOCALE_DATA[localeId][LocaleDataIndex.ExtraData] = extraData;\n    }\n}\n/**\n * Finds the locale data for a given locale.\n *\n * @param locale The locale code.\n * @returns The locale data.\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n */\nfunction findLocaleData(locale) {\n    const normalizedLocale = normalizeLocale(locale);\n    let match = getLocaleData(normalizedLocale);\n    if (match) {\n        return match;\n    }\n    // let's try to find a parent locale\n    const parentLocale = normalizedLocale.split('-')[0];\n    match = getLocaleData(parentLocale);\n    if (match) {\n        return match;\n    }\n    if (parentLocale === 'en') {\n        return localeEn;\n    }\n    throw new Error(`Missing locale data for the locale \"${locale}\".`);\n}\n/**\n * Retrieves the default currency code for the given locale.\n *\n * The default is defined as the first currency which is still in use.\n *\n * @param locale The code of the locale whose currency code we want.\n * @returns The code of the default currency for the given locale.\n *\n */\nfunction getLocaleCurrencyCode(locale) {\n    const data = findLocaleData(locale);\n    return data[LocaleDataIndex.CurrencyCode] || null;\n}\n/**\n * Retrieves the plural function used by ICU expressions to determine the plural case to use\n * for a given locale.\n * @param locale A locale code for the locale format rules to use.\n * @returns The plural function for the locale.\n * @see `NgPlural`\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n */\nfunction getLocalePluralCase(locale) {\n    const data = findLocaleData(locale);\n    return data[LocaleDataIndex.PluralCase];\n}\n/**\n * Helper function to get the given `normalizedLocale` from `LOCALE_DATA`\n * or from the global `ng.common.locale`.\n */\nfunction getLocaleData(normalizedLocale) {\n    if (!(normalizedLocale in LOCALE_DATA)) {\n        LOCALE_DATA[normalizedLocale] = _global.ng && _global.ng.common && _global.ng.common.locales &&\n            _global.ng.common.locales[normalizedLocale];\n    }\n    return LOCALE_DATA[normalizedLocale];\n}\n/**\n * Helper function to remove all the locale data from `LOCALE_DATA`.\n */\nfunction unregisterAllLocaleData() {\n    LOCALE_DATA = {};\n}\n/**\n * Index of each type of locale data from the locale data array\n */\nvar LocaleDataIndex;\n(function (LocaleDataIndex) {\n    LocaleDataIndex[LocaleDataIndex[\"LocaleId\"] = 0] = \"LocaleId\";\n    LocaleDataIndex[LocaleDataIndex[\"DayPeriodsFormat\"] = 1] = \"DayPeriodsFormat\";\n    LocaleDataIndex[LocaleDataIndex[\"DayPeriodsStandalone\"] = 2] = \"DayPeriodsStandalone\";\n    LocaleDataIndex[LocaleDataIndex[\"DaysFormat\"] = 3] = \"DaysFormat\";\n    LocaleDataIndex[LocaleDataIndex[\"DaysStandalone\"] = 4] = \"DaysStandalone\";\n    LocaleDataIndex[LocaleDataIndex[\"MonthsFormat\"] = 5] = \"MonthsFormat\";\n    LocaleDataIndex[LocaleDataIndex[\"MonthsStandalone\"] = 6] = \"MonthsStandalone\";\n    LocaleDataIndex[LocaleDataIndex[\"Eras\"] = 7] = \"Eras\";\n    LocaleDataIndex[LocaleDataIndex[\"FirstDayOfWeek\"] = 8] = \"FirstDayOfWeek\";\n    LocaleDataIndex[LocaleDataIndex[\"WeekendRange\"] = 9] = \"WeekendRange\";\n    LocaleDataIndex[LocaleDataIndex[\"DateFormat\"] = 10] = \"DateFormat\";\n    LocaleDataIndex[LocaleDataIndex[\"TimeFormat\"] = 11] = \"TimeFormat\";\n    LocaleDataIndex[LocaleDataIndex[\"DateTimeFormat\"] = 12] = \"DateTimeFormat\";\n    LocaleDataIndex[LocaleDataIndex[\"NumberSymbols\"] = 13] = \"NumberSymbols\";\n    LocaleDataIndex[LocaleDataIndex[\"NumberFormats\"] = 14] = \"NumberFormats\";\n    LocaleDataIndex[LocaleDataIndex[\"CurrencyCode\"] = 15] = \"CurrencyCode\";\n    LocaleDataIndex[LocaleDataIndex[\"CurrencySymbol\"] = 16] = \"CurrencySymbol\";\n    LocaleDataIndex[LocaleDataIndex[\"CurrencyName\"] = 17] = \"CurrencyName\";\n    LocaleDataIndex[LocaleDataIndex[\"Currencies\"] = 18] = \"Currencies\";\n    LocaleDataIndex[LocaleDataIndex[\"Directionality\"] = 19] = \"Directionality\";\n    LocaleDataIndex[LocaleDataIndex[\"PluralCase\"] = 20] = \"PluralCase\";\n    LocaleDataIndex[LocaleDataIndex[\"ExtraData\"] = 21] = \"ExtraData\";\n})(LocaleDataIndex || (LocaleDataIndex = {}));\n/**\n * Returns the canonical form of a locale name - lowercase with `_` replaced with `-`.\n */\nfunction normalizeLocale(locale) {\n    return locale.toLowerCase().replace(/_/g, '-');\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst pluralMapping = ['zero', 'one', 'two', 'few', 'many'];\n/**\n * Returns the plural case based on the locale\n */\nfunction getPluralCase(value, locale) {\n    const plural = getLocalePluralCase(locale)(parseInt(value, 10));\n    const result = pluralMapping[plural];\n    return (result !== undefined) ? result : 'other';\n}\n/**\n * The locale id that the application is using by default (for translations and ICU expressions).\n */\nconst DEFAULT_LOCALE_ID = 'en-US';\n/**\n * USD currency code that the application uses by default for CurrencyPipe when no\n * DEFAULT_CURRENCY_CODE is provided.\n */\nconst USD_CURRENCY_CODE = 'USD';\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * The locale id that the application is currently using (for translations and ICU expressions).\n * This is the ivy version of `LOCALE_ID` that was defined as an injection token for the view engine\n * but is now defined as a global value.\n */\nlet LOCALE_ID = DEFAULT_LOCALE_ID;\n/**\n * Sets the locale id that will be used for translations and ICU expressions.\n * This is the ivy version of `LOCALE_ID` that was defined as an injection token for the view engine\n * but is now defined as a global value.\n *\n * @param localeId\n */\nfunction setLocaleId(localeId) {\n    assertDefined(localeId, `Expected localeId to be defined`);\n    if (typeof localeId === 'string') {\n        LOCALE_ID = localeId.toLowerCase().replace(/_/g, '-');\n    }\n}\n/**\n * Gets the locale id that will be used for translations and ICU expressions.\n * This is the ivy version of `LOCALE_ID` that was defined as an injection token for the view engine\n * but is now defined as a global value.\n */\nfunction getLocaleId() {\n    return LOCALE_ID;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * NOTE: changes to the `ngI18nClosureMode` name must be synced with `compiler-cli/src/tooling.ts`.\n */\nif (typeof ngI18nClosureMode === 'undefined') {\n    // These property accesses can be ignored because ngI18nClosureMode will be set to false\n    // when optimizing code and the whole if statement will be dropped.\n    // Make sure to refer to ngI18nClosureMode as ['ngI18nClosureMode'] for closure.\n    // NOTE: we need to have it in IIFE so that the tree-shaker is happy.\n    (function () {\n        // tslint:disable-next-line:no-toplevel-property-access\n        _global['ngI18nClosureMode'] =\n            // TODO(FW-1250): validate that this actually, you know, works.\n            // tslint:disable-next-line:no-toplevel-property-access\n            typeof goog !== 'undefined' && typeof goog.getMsg === 'function';\n    })();\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction getParentFromI18nMutateOpCode(mergedCode) {\n    return mergedCode >>> 17 /* SHIFT_PARENT */;\n}\nfunction getRefFromI18nMutateOpCode(mergedCode) {\n    return (mergedCode & 131064 /* MASK_REF */) >>> 3 /* SHIFT_REF */;\n}\nfunction getInstructionFromI18nMutateOpCode(mergedCode) {\n    return mergedCode & 7 /* MASK_INSTRUCTION */;\n}\n/**\n * Marks that the next string is an element name.\n *\n * See `I18nMutateOpCodes` documentation.\n */\nconst ELEMENT_MARKER = {\n    marker: 'element'\n};\n/**\n * Marks that the next string is comment text.\n *\n * See `I18nMutateOpCodes` documentation.\n */\nconst COMMENT_MARKER = {\n    marker: 'comment'\n};\n// Note: This hack is necessary so we don't erroneously get a circular dependency\n// failure based on types.\nconst unusedValueExportToPlacateAjd$6 = 1;\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst i18nIndexStack = [];\nlet i18nIndexStackPointer = -1;\nfunction popI18nIndex() {\n    return i18nIndexStack[i18nIndexStackPointer--];\n}\nfunction pushI18nIndex(index) {\n    i18nIndexStack[++i18nIndexStackPointer] = index;\n}\nlet changeMask = 0b0;\nlet shiftsCounter = 0;\nfunction setMaskBit(bit) {\n    if (bit) {\n        changeMask = changeMask | (1 << shiftsCounter);\n    }\n    shiftsCounter++;\n}\nfunction applyI18n(tView, lView, index) {\n    if (shiftsCounter > 0) {\n        ngDevMode && assertDefined(tView, `tView should be defined`);\n        const tI18n = tView.data[index + HEADER_OFFSET];\n        let updateOpCodes;\n        let tIcus = null;\n        if (Array.isArray(tI18n)) {\n            updateOpCodes = tI18n;\n        }\n        else {\n            updateOpCodes = tI18n.update;\n            tIcus = tI18n.icus;\n        }\n        const bindingsStartIndex = getBindingIndex() - shiftsCounter - 1;\n        applyUpdateOpCodes(tView, tIcus, lView, updateOpCodes, bindingsStartIndex, changeMask);\n        // Reset changeMask & maskBit to default for the next update cycle\n        changeMask = 0b0;\n        shiftsCounter = 0;\n    }\n}\n/**\n * Apply `I18nMutateOpCodes` OpCodes.\n *\n * @param tView Current `TView`\n * @param rootIndex Pointer to the root (parent) tNode for the i18n.\n * @param createOpCodes OpCodes to process\n * @param lView Current `LView`\n */\nfunction applyCreateOpCodes(tView, rootindex, createOpCodes, lView) {\n    const renderer = lView[RENDERER];\n    let currentTNode = null;\n    let previousTNode = null;\n    const visitedNodes = [];\n    for (let i = 0; i < createOpCodes.length; i++) {\n        const opCode = createOpCodes[i];\n        if (typeof opCode == 'string') {\n            const textRNode = createTextNode(opCode, renderer);\n            const textNodeIndex = createOpCodes[++i];\n            ngDevMode && ngDevMode.rendererCreateTextNode++;\n            previousTNode = currentTNode;\n            currentTNode =\n                createDynamicNodeAtIndex(tView, lView, textNodeIndex, 3 /* Element */, textRNode, null);\n            visitedNodes.push(textNodeIndex);\n            setIsNotParent();\n        }\n        else if (typeof opCode == 'number') {\n            switch (opCode & 7 /* MASK_INSTRUCTION */) {\n                case 1 /* AppendChild */:\n                    const destinationNodeIndex = opCode >>> 17 /* SHIFT_PARENT */;\n                    let destinationTNode;\n                    if (destinationNodeIndex === rootindex) {\n                        // If the destination node is `i18nStart`, we don't have a\n                        // top-level node and we should use the host node instead\n                        destinationTNode = lView[T_HOST];\n                    }\n                    else {\n                        destinationTNode = getTNode(tView, destinationNodeIndex);\n                    }\n                    ngDevMode &&\n                        assertDefined(currentTNode, `You need to create or select a node before you can insert it into the DOM`);\n                    previousTNode =\n                        appendI18nNode(tView, currentTNode, destinationTNode, previousTNode, lView);\n                    break;\n                case 0 /* Select */:\n                    // Negative indices indicate that a given TNode is a sibling node, not a parent node\n                    // (see `i18nStartFirstPass` for additional information).\n                    const isParent = opCode >= 0;\n                    // FIXME(misko): This SHIFT_REF looks suspect as it does not have mask.\n                    const nodeIndex = (isParent ? opCode : ~opCode) >>> 3 /* SHIFT_REF */;\n                    visitedNodes.push(nodeIndex);\n                    previousTNode = currentTNode;\n                    currentTNode = getTNode(tView, nodeIndex);\n                    if (currentTNode) {\n                        setPreviousOrParentTNode(currentTNode, isParent);\n                    }\n                    break;\n                case 5 /* ElementEnd */:\n                    const elementIndex = opCode >>> 3 /* SHIFT_REF */;\n                    previousTNode = currentTNode = getTNode(tView, elementIndex);\n                    setPreviousOrParentTNode(currentTNode, false);\n                    break;\n                case 4 /* Attr */:\n                    const elementNodeIndex = opCode >>> 3 /* SHIFT_REF */;\n                    const attrName = createOpCodes[++i];\n                    const attrValue = createOpCodes[++i];\n                    // This code is used for ICU expressions only, since we don't support\n                    // directives/components in ICUs, we don't need to worry about inputs here\n                    elementAttributeInternal(getTNode(tView, elementNodeIndex), lView, attrName, attrValue, null, null);\n                    break;\n                default:\n                    throw new Error(`Unable to determine the type of mutate operation for \"${opCode}\"`);\n            }\n        }\n        else {\n            switch (opCode) {\n                case COMMENT_MARKER:\n                    const commentValue = createOpCodes[++i];\n                    const commentNodeIndex = createOpCodes[++i];\n                    ngDevMode &&\n                        assertEqual(typeof commentValue, 'string', `Expected \"${commentValue}\" to be a comment node value`);\n                    const commentRNode = renderer.createComment(commentValue);\n                    ngDevMode && ngDevMode.rendererCreateComment++;\n                    previousTNode = currentTNode;\n                    currentTNode = createDynamicNodeAtIndex(tView, lView, commentNodeIndex, 5 /* IcuContainer */, commentRNode, null);\n                    visitedNodes.push(commentNodeIndex);\n                    attachPatchData(commentRNode, lView);\n                    // We will add the case nodes later, during the update phase\n                    setIsNotParent();\n                    break;\n                case ELEMENT_MARKER:\n                    const tagNameValue = createOpCodes[++i];\n                    const elementNodeIndex = createOpCodes[++i];\n                    ngDevMode &&\n                        assertEqual(typeof tagNameValue, 'string', `Expected \"${tagNameValue}\" to be an element node tag name`);\n                    const elementRNode = renderer.createElement(tagNameValue);\n                    ngDevMode && ngDevMode.rendererCreateElement++;\n                    previousTNode = currentTNode;\n                    currentTNode = createDynamicNodeAtIndex(tView, lView, elementNodeIndex, 3 /* Element */, elementRNode, tagNameValue);\n                    visitedNodes.push(elementNodeIndex);\n                    break;\n                default:\n                    throw new Error(`Unable to determine the type of mutate operation for \"${opCode}\"`);\n            }\n        }\n    }\n    setIsNotParent();\n    return visitedNodes;\n}\n/**\n * Apply `I18nUpdateOpCodes` OpCodes\n *\n * @param tView Current `TView`\n * @param tIcus If ICUs present than this contains them.\n * @param lView Current `LView`\n * @param updateOpCodes OpCodes to process\n * @param bindingsStartIndex Location of the first `ɵɵi18nApply`\n * @param changeMask Each bit corresponds to a `ɵɵi18nExp` (Counting backwards from\n *     `bindingsStartIndex`)\n */\nfunction applyUpdateOpCodes(tView, tIcus, lView, updateOpCodes, bindingsStartIndex, changeMask) {\n    let caseCreated = false;\n    for (let i = 0; i < updateOpCodes.length; i++) {\n        // bit code to check if we should apply the next update\n        const checkBit = updateOpCodes[i];\n        // Number of opCodes to skip until next set of update codes\n        const skipCodes = updateOpCodes[++i];\n        if (checkBit & changeMask) {\n            // The value has been updated since last checked\n            let value = '';\n            for (let j = i + 1; j <= (i + skipCodes); j++) {\n                const opCode = updateOpCodes[j];\n                if (typeof opCode == 'string') {\n                    value += opCode;\n                }\n                else if (typeof opCode == 'number') {\n                    if (opCode < 0) {\n                        // Negative opCode represent `i18nExp` values offset.\n                        value += renderStringify(lView[bindingsStartIndex - opCode]);\n                    }\n                    else {\n                        const nodeIndex = opCode >>> 2 /* SHIFT_REF */;\n                        switch (opCode & 3 /* MASK_OPCODE */) {\n                            case 1 /* Attr */:\n                                const propName = updateOpCodes[++j];\n                                const sanitizeFn = updateOpCodes[++j];\n                                elementPropertyInternal(tView, getTNode(tView, nodeIndex), lView, propName, value, lView[RENDERER], sanitizeFn, false);\n                                break;\n                            case 0 /* Text */:\n                                textBindingInternal(lView, nodeIndex, value);\n                                break;\n                            case 2 /* IcuSwitch */:\n                                caseCreated =\n                                    applyIcuSwitchCase(tView, tIcus, updateOpCodes[++j], lView, value);\n                                break;\n                            case 3 /* IcuUpdate */:\n                                applyIcuUpdateCase(tView, tIcus, updateOpCodes[++j], bindingsStartIndex, lView, caseCreated);\n                                break;\n                        }\n                    }\n                }\n            }\n        }\n        i += skipCodes;\n    }\n}\n/**\n * Apply OpCodes associated with updating an existing ICU.\n *\n * @param tView Current `TView`\n * @param tIcus ICUs active at this location.\n * @param tIcuIndex Index into `tIcus` to process.\n * @param bindingsStartIndex Location of the first `ɵɵi18nApply`\n * @param lView Current `LView`\n * @param changeMask Each bit corresponds to a `ɵɵi18nExp` (Counting backwards from\n *     `bindingsStartIndex`)\n */\nfunction applyIcuUpdateCase(tView, tIcus, tIcuIndex, bindingsStartIndex, lView, caseCreated) {\n    ngDevMode && assertIndexInRange(tIcus, tIcuIndex);\n    const tIcu = tIcus[tIcuIndex];\n    ngDevMode && assertIndexInRange(lView, tIcu.currentCaseLViewIndex);\n    const activeCaseIndex = lView[tIcu.currentCaseLViewIndex];\n    if (activeCaseIndex !== null) {\n        const mask = caseCreated ?\n            -1 : // -1 is same as all bits on, which simulates creation since it marks all bits dirty\n            changeMask;\n        applyUpdateOpCodes(tView, tIcus, lView, tIcu.update[activeCaseIndex], bindingsStartIndex, mask);\n    }\n}\n/**\n * Apply OpCodes associated with switching a case on ICU.\n *\n * This involves tearing down existing case and than building up a new case.\n *\n * @param tView Current `TView`\n * @param tIcus ICUs active at this location.\n * @param tICuIndex Index into `tIcus` to process.\n * @param lView Current `LView`\n * @param value Value of the case to update to.\n * @returns true if a new case was created (needed so that the update executes regardless of the\n *     bitmask)\n */\nfunction applyIcuSwitchCase(tView, tIcus, tICuIndex, lView, value) {\n    applyIcuSwitchCaseRemove(tView, tIcus, tICuIndex, lView);\n    // Rebuild a new case for this ICU\n    let caseCreated = false;\n    const tIcu = tIcus[tICuIndex];\n    const caseIndex = getCaseIndex(tIcu, value);\n    lView[tIcu.currentCaseLViewIndex] = caseIndex !== -1 ? caseIndex : null;\n    if (caseIndex > -1) {\n        // Add the nodes for the new case\n        applyCreateOpCodes(tView, -1, // -1 means we don't have parent node\n        tIcu.create[caseIndex], lView);\n        caseCreated = true;\n    }\n    return caseCreated;\n}\n/**\n * Apply OpCodes associated with tearing down of DOM.\n *\n * This involves tearing down existing case and than building up a new case.\n *\n * @param tView Current `TView`\n * @param tIcus ICUs active at this location.\n * @param tIcuIndex Index into `tIcus` to process.\n * @param lView Current `LView`\n * @returns true if a new case was created (needed so that the update executes regardless of the\n *     bitmask)\n */\nfunction applyIcuSwitchCaseRemove(tView, tIcus, tIcuIndex, lView) {\n    ngDevMode && assertIndexInRange(tIcus, tIcuIndex);\n    const tIcu = tIcus[tIcuIndex];\n    const activeCaseIndex = lView[tIcu.currentCaseLViewIndex];\n    if (activeCaseIndex !== null) {\n        const removeCodes = tIcu.remove[activeCaseIndex];\n        for (let k = 0; k < removeCodes.length; k++) {\n            const removeOpCode = removeCodes[k];\n            const nodeOrIcuIndex = removeOpCode >>> 3 /* SHIFT_REF */;\n            switch (removeOpCode & 7 /* MASK_INSTRUCTION */) {\n                case 3 /* Remove */:\n                    // FIXME(misko): this comment is wrong!\n                    // Remove DOM element, but do *not* mark TNode as detached, since we are\n                    // just switching ICU cases (while keeping the same TNode), so a DOM element\n                    // representing a new ICU case will be re-created.\n                    removeNode(tView, lView, nodeOrIcuIndex, /* markAsDetached */ false);\n                    break;\n                case 6 /* RemoveNestedIcu */:\n                    applyIcuSwitchCaseRemove(tView, tIcus, nodeOrIcuIndex, lView);\n                    break;\n            }\n        }\n    }\n}\nfunction appendI18nNode(tView, tNode, parentTNode, previousTNode, lView) {\n    ngDevMode && ngDevMode.rendererMoveNode++;\n    const nextNode = tNode.next;\n    if (!previousTNode) {\n        previousTNode = parentTNode;\n    }\n    // Re-organize node tree to put this node in the correct position.\n    if (previousTNode === parentTNode && tNode !== parentTNode.child) {\n        tNode.next = parentTNode.child;\n        parentTNode.child = tNode;\n    }\n    else if (previousTNode !== parentTNode && tNode !== previousTNode.next) {\n        tNode.next = previousTNode.next;\n        previousTNode.next = tNode;\n    }\n    else {\n        tNode.next = null;\n    }\n    if (parentTNode !== lView[T_HOST]) {\n        tNode.parent = parentTNode;\n    }\n    // If tNode was moved around, we might need to fix a broken link.\n    let cursor = tNode.next;\n    while (cursor) {\n        if (cursor.next === tNode) {\n            cursor.next = nextNode;\n        }\n        cursor = cursor.next;\n    }\n    // If the placeholder to append is a projection, we need to move the projected nodes instead\n    if (tNode.type === 1 /* Projection */) {\n        applyProjection(tView, lView, tNode);\n        return tNode;\n    }\n    appendChild(tView, lView, getNativeByTNode(tNode, lView), tNode);\n    const slotValue = lView[tNode.index];\n    if (tNode.type !== 0 /* Container */ && isLContainer(slotValue)) {\n        // Nodes that inject ViewContainerRef also have a comment node that should be moved\n        appendChild(tView, lView, slotValue[NATIVE], tNode);\n    }\n    return tNode;\n}\n/**\n * See `i18nEnd` above.\n */\nfunction i18nEndFirstPass(tView, lView) {\n    ngDevMode &&\n        assertEqual(getBindingIndex(), tView.bindingStartIndex, 'i18nEnd should be called before any binding');\n    const rootIndex = popI18nIndex();\n    const tI18n = tView.data[rootIndex + HEADER_OFFSET];\n    ngDevMode && assertDefined(tI18n, `You should call i18nStart before i18nEnd`);\n    // Find the last node that was added before `i18nEnd`\n    const lastCreatedNode = getPreviousOrParentTNode();\n    // Read the instructions to insert/move/remove DOM elements\n    const visitedNodes = applyCreateOpCodes(tView, rootIndex, tI18n.create, lView);\n    // Remove deleted nodes\n    let index = rootIndex + 1;\n    while (index <= lastCreatedNode.index - HEADER_OFFSET) {\n        if (visitedNodes.indexOf(index) === -1) {\n            removeNode(tView, lView, index, /* markAsDetached */ true);\n        }\n        // Check if an element has any local refs and skip them\n        const tNode = getTNode(tView, index);\n        if (tNode &&\n            (tNode.type === 0 /* Container */ || tNode.type === 3 /* Element */ ||\n                tNode.type === 4 /* ElementContainer */) &&\n            tNode.localNames !== null) {\n            // Divide by 2 to get the number of local refs,\n            // since they are stored as an array that also includes directive indexes,\n            // i.e. [\"localRef\", directiveIndex, ...]\n            index += tNode.localNames.length >> 1;\n        }\n        index++;\n    }\n}\nfunction removeNode(tView, lView, index, markAsDetached) {\n    const removedPhTNode = getTNode(tView, index);\n    const removedPhRNode = getNativeByIndex(index, lView);\n    if (removedPhRNode) {\n        nativeRemoveNode(lView[RENDERER], removedPhRNode);\n    }\n    const slotValue = load(lView, index);\n    if (isLContainer(slotValue)) {\n        const lContainer = slotValue;\n        if (removedPhTNode.type !== 0 /* Container */) {\n            nativeRemoveNode(lView[RENDERER], lContainer[NATIVE]);\n        }\n    }\n    if (markAsDetached) {\n        // Define this node as detached to avoid projecting it later\n        removedPhTNode.flags |= 64 /* isDetached */;\n    }\n    ngDevMode && ngDevMode.rendererRemoveNode++;\n}\n/**\n * Creates and stores the dynamic TNode, and unhooks it from the tree for now.\n */\nfunction createDynamicNodeAtIndex(tView, lView, index, type, native, name) {\n    const previousOrParentTNode = getPreviousOrParentTNode();\n    ngDevMode && assertIndexInRange(lView, index + HEADER_OFFSET);\n    lView[index + HEADER_OFFSET] = native;\n    // FIXME(misko): Why does this create A TNode??? I would not expect this to be here.\n    const tNode = getOrCreateTNode(tView, lView[T_HOST], index, type, name, null);\n    // We are creating a dynamic node, the previous tNode might not be pointing at this node.\n    // We will link ourselves into the tree later with `appendI18nNode`.\n    if (previousOrParentTNode && previousOrParentTNode.next === tNode) {\n        previousOrParentTNode.next = null;\n    }\n    return tNode;\n}\n/**\n * Returns the index of the current case of an ICU expression depending on the main binding value\n *\n * @param icuExpression\n * @param bindingValue The value of the main binding used by this ICU expression\n */\nfunction getCaseIndex(icuExpression, bindingValue) {\n    let index = icuExpression.cases.indexOf(bindingValue);\n    if (index === -1) {\n        switch (icuExpression.type) {\n            case 1 /* plural */: {\n                const resolvedCase = getPluralCase(bindingValue, getLocaleId());\n                index = icuExpression.cases.indexOf(resolvedCase);\n                if (index === -1 && resolvedCase !== 'other') {\n                    index = icuExpression.cases.indexOf('other');\n                }\n                break;\n            }\n            case 0 /* select */: {\n                index = icuExpression.cases.indexOf('other');\n                break;\n            }\n        }\n    }\n    return index;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Converts `I18nUpdateOpCodes` array into a human readable format.\n *\n * This function is attached to the `I18nUpdateOpCodes.debug` property if `ngDevMode` is enabled.\n * This function provides a human readable view of the opcodes. This is useful when debugging the\n * application as well as writing more readable tests.\n *\n * @param this `I18nUpdateOpCodes` if attached as a method.\n * @param opcodes `I18nUpdateOpCodes` if invoked as a function.\n */\nfunction i18nUpdateOpCodesToString(opcodes) {\n    const parser = new OpCodeParser(opcodes || (Array.isArray(this) ? this : []));\n    let lines = [];\n    function consumeOpCode(value) {\n        const ref = value >>> 2 /* SHIFT_REF */;\n        const opCode = value & 3 /* MASK_OPCODE */;\n        switch (opCode) {\n            case 0 /* Text */:\n                return `(lView[${ref}] as Text).textContent = $$$`;\n            case 1 /* Attr */:\n                const attrName = parser.consumeString();\n                const sanitizationFn = parser.consumeFunction();\n                const value = sanitizationFn ? `(${sanitizationFn})($$$)` : '$$$';\n                return `(lView[${ref}] as Element).setAttribute('${attrName}', ${value})`;\n            case 2 /* IcuSwitch */:\n                return `icuSwitchCase(lView[${ref}] as Comment, ${parser.consumeNumber()}, $$$)`;\n            case 3 /* IcuUpdate */:\n                return `icuUpdateCase(lView[${ref}] as Comment, ${parser.consumeNumber()})`;\n        }\n        throw new Error('unexpected OpCode');\n    }\n    while (parser.hasMore()) {\n        let mask = parser.consumeNumber();\n        let size = parser.consumeNumber();\n        const end = parser.i + size;\n        const statements = [];\n        let statement = '';\n        while (parser.i < end) {\n            let value = parser.consumeNumberOrString();\n            if (typeof value === 'string') {\n                statement += value;\n            }\n            else if (value < 0) {\n                // Negative numbers are ref indexes\n                statement += '${lView[' + (0 - value) + ']}';\n            }\n            else {\n                // Positive numbers are operations.\n                const opCodeText = consumeOpCode(value);\n                statements.push(opCodeText.replace('$$$', '`' + statement + '`') + ';');\n                statement = '';\n            }\n        }\n        lines.push(`if (mask & 0b${mask.toString(2)}) { ${statements.join(' ')} }`);\n    }\n    return lines;\n}\n/**\n * Converts `I18nMutableOpCodes` array into a human readable format.\n *\n * This function is attached to the `I18nMutableOpCodes.debug` if `ngDevMode` is enabled. This\n * function provides a human readable view of the opcodes. This is useful when debugging the\n * application as well as writing more readable tests.\n *\n * @param this `I18nMutableOpCodes` if attached as a method.\n * @param opcodes `I18nMutableOpCodes` if invoked as a function.\n */\nfunction i18nMutateOpCodesToString(opcodes) {\n    const parser = new OpCodeParser(opcodes || (Array.isArray(this) ? this : []));\n    let lines = [];\n    function consumeOpCode(opCode) {\n        const parent = getParentFromI18nMutateOpCode(opCode);\n        const ref = getRefFromI18nMutateOpCode(opCode);\n        switch (getInstructionFromI18nMutateOpCode(opCode)) {\n            case 0 /* Select */:\n                lastRef = ref;\n                return '';\n            case 1 /* AppendChild */:\n                return `(lView[${parent}] as Element).appendChild(lView[${lastRef}])`;\n            case 3 /* Remove */:\n                return `(lView[${parent}] as Element).remove(lView[${ref}])`;\n            case 4 /* Attr */:\n                return `(lView[${ref}] as Element).setAttribute(\"${parser.consumeString()}\", \"${parser.consumeString()}\")`;\n            case 5 /* ElementEnd */:\n                return `setPreviousOrParentTNode(tView.data[${ref}] as TNode)`;\n            case 6 /* RemoveNestedIcu */:\n                return `removeNestedICU(${ref})`;\n        }\n        throw new Error('Unexpected OpCode');\n    }\n    let lastRef = -1;\n    while (parser.hasMore()) {\n        let value = parser.consumeNumberStringOrMarker();\n        if (value === COMMENT_MARKER) {\n            const text = parser.consumeString();\n            lastRef = parser.consumeNumber();\n            lines.push(`lView[${lastRef}] = document.createComment(\"${text}\")`);\n        }\n        else if (value === ELEMENT_MARKER) {\n            const text = parser.consumeString();\n            lastRef = parser.consumeNumber();\n            lines.push(`lView[${lastRef}] = document.createElement(\"${text}\")`);\n        }\n        else if (typeof value === 'string') {\n            lastRef = parser.consumeNumber();\n            lines.push(`lView[${lastRef}] = document.createTextNode(\"${value}\")`);\n        }\n        else if (typeof value === 'number') {\n            const line = consumeOpCode(value);\n            line && lines.push(line);\n        }\n        else {\n            throw new Error('Unexpected value');\n        }\n    }\n    return lines;\n}\nclass OpCodeParser {\n    constructor(codes) {\n        this.i = 0;\n        this.codes = codes;\n    }\n    hasMore() {\n        return this.i < this.codes.length;\n    }\n    consumeNumber() {\n        let value = this.codes[this.i++];\n        assertNumber(value, 'expecting number in OpCode');\n        return value;\n    }\n    consumeString() {\n        let value = this.codes[this.i++];\n        assertString(value, 'expecting string in OpCode');\n        return value;\n    }\n    consumeFunction() {\n        let value = this.codes[this.i++];\n        if (value === null || typeof value === 'function') {\n            return value;\n        }\n        throw new Error('expecting function in OpCode');\n    }\n    consumeNumberOrString() {\n        let value = this.codes[this.i++];\n        if (typeof value === 'string') {\n            return value;\n        }\n        assertNumber(value, 'expecting number or string in OpCode');\n        return value;\n    }\n    consumeNumberStringOrMarker() {\n        let value = this.codes[this.i++];\n        if (typeof value === 'string' || typeof value === 'number' || value == COMMENT_MARKER ||\n            value == ELEMENT_MARKER) {\n            return value;\n        }\n        assertNumber(value, 'expecting number, string, COMMENT_MARKER or ELEMENT_MARKER in OpCode');\n        return value;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst BINDING_REGEXP = /�(\\d+):?\\d*�/gi;\nconst ICU_REGEXP = /({\\s*�\\d+:?\\d*�\\s*,\\s*\\S{6}\\s*,[\\s\\S]*})/gi;\nconst NESTED_ICU = /�(\\d+)�/;\nconst ICU_BLOCK_REGEXP = /^\\s*(�\\d+:?\\d*�)\\s*,\\s*(select|plural)\\s*,/;\n// Count for the number of vars that will be allocated for each i18n block.\n// It is global because this is used in multiple functions that include loops and recursive calls.\n// This is reset to 0 when `i18nStartFirstPass` is called.\nlet i18nVarsCount;\nconst parentIndexStack = [];\nconst MARKER = `�`;\nconst SUBTEMPLATE_REGEXP = /�\\/?\\*(\\d+:\\d+)�/gi;\nconst PH_REGEXP = /�(\\/?[#*!]\\d+):?\\d*�/gi;\n/**\n * Angular Dart introduced &ngsp; as a placeholder for non-removable space, see:\n * https://github.com/dart-lang/angular/blob/0bb611387d29d65b5af7f9d2515ab571fd3fbee4/_tests/test/compiler/preserve_whitespace_test.dart#L25-L32\n * In Angular Dart &ngsp; is converted to the 0xE500 PUA (Private Use Areas) unicode character\n * and later on replaced by a space. We are re-implementing the same idea here, since translations\n * might contain this special character.\n */\nconst NGSP_UNICODE_REGEXP = /\\uE500/g;\nfunction replaceNgsp(value) {\n    return value.replace(NGSP_UNICODE_REGEXP, ' ');\n}\n/**\n * See `i18nStart` above.\n */\nfunction i18nStartFirstPass(lView, tView, index, message, subTemplateIndex) {\n    const startIndex = tView.blueprint.length - HEADER_OFFSET;\n    i18nVarsCount = 0;\n    const previousOrParentTNode = getPreviousOrParentTNode();\n    const parentTNode = getIsParent() ? previousOrParentTNode : previousOrParentTNode && previousOrParentTNode.parent;\n    let parentIndex = parentTNode && parentTNode !== lView[T_HOST] ? parentTNode.index - HEADER_OFFSET : index;\n    let parentIndexPointer = 0;\n    parentIndexStack[parentIndexPointer] = parentIndex;\n    const createOpCodes = [];\n    if (ngDevMode) {\n        attachDebugGetter(createOpCodes, i18nMutateOpCodesToString);\n    }\n    // If the previous node wasn't the direct parent then we have a translation without top level\n    // element and we need to keep a reference of the previous element if there is one. We should also\n    // keep track whether an element was a parent node or not, so that the logic that consumes\n    // the generated `I18nMutateOpCode`s can leverage this information to properly set TNode state\n    // (whether it's a parent or sibling).\n    if (index > 0 && previousOrParentTNode !== parentTNode) {\n        let previousTNodeIndex = previousOrParentTNode.index - HEADER_OFFSET;\n        // If current TNode is a sibling node, encode it using a negative index. This information is\n        // required when the `Select` action is processed (see the `readCreateOpCodes` function).\n        if (!getIsParent()) {\n            previousTNodeIndex = ~previousTNodeIndex;\n        }\n        // Create an OpCode to select the previous TNode\n        createOpCodes.push(previousTNodeIndex << 3 /* SHIFT_REF */ | 0 /* Select */);\n    }\n    const updateOpCodes = [];\n    if (ngDevMode) {\n        attachDebugGetter(updateOpCodes, i18nUpdateOpCodesToString);\n    }\n    const icuExpressions = [];\n    if (message === '' && isRootTemplateMessage(subTemplateIndex)) {\n        // If top level translation is an empty string, do not invoke additional processing\n        // and just create op codes for empty text node instead.\n        createOpCodes.push(message, allocNodeIndex(startIndex), parentIndex << 17 /* SHIFT_PARENT */ | 1 /* AppendChild */);\n    }\n    else {\n        const templateTranslation = getTranslationForTemplate(message, subTemplateIndex);\n        const msgParts = replaceNgsp(templateTranslation).split(PH_REGEXP);\n        for (let i = 0; i < msgParts.length; i++) {\n            let value = msgParts[i];\n            if (i & 1) {\n                // Odd indexes are placeholders (elements and sub-templates)\n                if (value.charAt(0) === '/') {\n                    // It is a closing tag\n                    if (value.charAt(1) === \"#\" /* ELEMENT */) {\n                        const phIndex = parseInt(value.substr(2), 10);\n                        parentIndex = parentIndexStack[--parentIndexPointer];\n                        createOpCodes.push(phIndex << 3 /* SHIFT_REF */ | 5 /* ElementEnd */);\n                    }\n                }\n                else {\n                    const phIndex = parseInt(value.substr(1), 10);\n                    const isElement = value.charAt(0) === \"#\" /* ELEMENT */;\n                    // The value represents a placeholder that we move to the designated index.\n                    // Note: positive indicies indicate that a TNode with a given index should also be marked\n                    // as parent while executing `Select` instruction.\n                    createOpCodes.push((isElement ? phIndex : ~phIndex) << 3 /* SHIFT_REF */ |\n                        0 /* Select */, parentIndex << 17 /* SHIFT_PARENT */ | 1 /* AppendChild */);\n                    if (isElement) {\n                        parentIndexStack[++parentIndexPointer] = parentIndex = phIndex;\n                    }\n                }\n            }\n            else {\n                // Even indexes are text (including bindings & ICU expressions)\n                const parts = extractParts(value);\n                for (let j = 0; j < parts.length; j++) {\n                    if (j & 1) {\n                        // Odd indexes are ICU expressions\n                        const icuExpression = parts[j];\n                        // Verify that ICU expression has the right shape. Translations might contain invalid\n                        // constructions (while original messages were correct), so ICU parsing at runtime may\n                        // not succeed (thus `icuExpression` remains a string).\n                        if (typeof icuExpression !== 'object') {\n                            throw new Error(`Unable to parse ICU expression in \"${templateTranslation}\" message.`);\n                        }\n                        // Create the comment node that will anchor the ICU expression\n                        const icuNodeIndex = allocNodeIndex(startIndex);\n                        createOpCodes.push(COMMENT_MARKER, ngDevMode ? `ICU ${icuNodeIndex}` : '', icuNodeIndex, parentIndex << 17 /* SHIFT_PARENT */ | 1 /* AppendChild */);\n                        // Update codes for the ICU expression\n                        const mask = getBindingMask(icuExpression);\n                        icuStart(icuExpressions, icuExpression, icuNodeIndex, icuNodeIndex);\n                        // Since this is recursive, the last TIcu that was pushed is the one we want\n                        const tIcuIndex = icuExpressions.length - 1;\n                        updateOpCodes.push(toMaskBit(icuExpression.mainBinding), // mask of the main binding\n                        3, // skip 3 opCodes if not changed\n                        -1 - icuExpression.mainBinding, icuNodeIndex << 2 /* SHIFT_REF */ | 2 /* IcuSwitch */, tIcuIndex, mask, // mask of all the bindings of this ICU expression\n                        2, // skip 2 opCodes if not changed\n                        icuNodeIndex << 2 /* SHIFT_REF */ | 3 /* IcuUpdate */, tIcuIndex);\n                    }\n                    else if (parts[j] !== '') {\n                        const text = parts[j];\n                        // Even indexes are text (including bindings)\n                        const hasBinding = text.match(BINDING_REGEXP);\n                        // Create text nodes\n                        const textNodeIndex = allocNodeIndex(startIndex);\n                        createOpCodes.push(\n                        // If there is a binding, the value will be set during update\n                        hasBinding ? '' : text, textNodeIndex, parentIndex << 17 /* SHIFT_PARENT */ | 1 /* AppendChild */);\n                        if (hasBinding) {\n                            addAllToArray(generateBindingUpdateOpCodes(text, textNodeIndex), updateOpCodes);\n                        }\n                    }\n                }\n            }\n        }\n    }\n    if (i18nVarsCount > 0) {\n        allocExpando(tView, lView, i18nVarsCount);\n    }\n    // NOTE: local var needed to properly assert the type of `TI18n`.\n    const tI18n = {\n        vars: i18nVarsCount,\n        create: createOpCodes,\n        update: updateOpCodes,\n        icus: icuExpressions.length ? icuExpressions : null,\n    };\n    tView.data[index + HEADER_OFFSET] = tI18n;\n}\n/**\n * See `i18nAttributes` above.\n */\nfunction i18nAttributesFirstPass(lView, tView, index, values) {\n    const previousElement = getPreviousOrParentTNode();\n    const previousElementIndex = previousElement.index - HEADER_OFFSET;\n    const updateOpCodes = [];\n    if (ngDevMode) {\n        attachDebugGetter(updateOpCodes, i18nUpdateOpCodesToString);\n    }\n    for (let i = 0; i < values.length; i += 2) {\n        const attrName = values[i];\n        const message = values[i + 1];\n        const parts = message.split(ICU_REGEXP);\n        for (let j = 0; j < parts.length; j++) {\n            const value = parts[j];\n            if (j & 1) {\n                // Odd indexes are ICU expressions\n                // TODO(ocombe): support ICU expressions in attributes\n                throw new Error('ICU expressions are not yet supported in attributes');\n            }\n            else if (value !== '') {\n                // Even indexes are text (including bindings)\n                const hasBinding = !!value.match(BINDING_REGEXP);\n                if (hasBinding) {\n                    if (tView.firstCreatePass && tView.data[index + HEADER_OFFSET] === null) {\n                        addAllToArray(generateBindingUpdateOpCodes(value, previousElementIndex, attrName), updateOpCodes);\n                    }\n                }\n                else {\n                    const tNode = getTNode(tView, previousElementIndex);\n                    // Set attributes for Elements only, for other types (like ElementContainer),\n                    // only set inputs below\n                    if (tNode.type === 3 /* Element */) {\n                        elementAttributeInternal(tNode, lView, attrName, value, null, null);\n                    }\n                    // Check if that attribute is a directive input\n                    const dataValue = tNode.inputs !== null && tNode.inputs[attrName];\n                    if (dataValue) {\n                        setInputsForProperty(tView, lView, dataValue, attrName, value);\n                        if (ngDevMode) {\n                            const element = getNativeByIndex(previousElementIndex, lView);\n                            setNgReflectProperties(lView, element, tNode.type, dataValue, value);\n                        }\n                    }\n                }\n            }\n        }\n    }\n    if (tView.firstCreatePass && tView.data[index + HEADER_OFFSET] === null) {\n        tView.data[index + HEADER_OFFSET] = updateOpCodes;\n    }\n}\n/**\n * Generate the OpCodes to update the bindings of a string.\n *\n * @param str The string containing the bindings.\n * @param destinationNode Index of the destination node which will receive the binding.\n * @param attrName Name of the attribute, if the string belongs to an attribute.\n * @param sanitizeFn Sanitization function used to sanitize the string after update, if necessary.\n */\nfunction generateBindingUpdateOpCodes(str, destinationNode, attrName, sanitizeFn = null) {\n    const updateOpCodes = [null, null]; // Alloc space for mask and size\n    if (ngDevMode) {\n        attachDebugGetter(updateOpCodes, i18nUpdateOpCodesToString);\n    }\n    const textParts = str.split(BINDING_REGEXP);\n    let mask = 0;\n    for (let j = 0; j < textParts.length; j++) {\n        const textValue = textParts[j];\n        if (j & 1) {\n            // Odd indexes are bindings\n            const bindingIndex = parseInt(textValue, 10);\n            updateOpCodes.push(-1 - bindingIndex);\n            mask = mask | toMaskBit(bindingIndex);\n        }\n        else if (textValue !== '') {\n            // Even indexes are text\n            updateOpCodes.push(textValue);\n        }\n    }\n    updateOpCodes.push(destinationNode << 2 /* SHIFT_REF */ |\n        (attrName ? 1 /* Attr */ : 0 /* Text */));\n    if (attrName) {\n        updateOpCodes.push(attrName, sanitizeFn);\n    }\n    updateOpCodes[0] = mask;\n    updateOpCodes[1] = updateOpCodes.length - 2;\n    return updateOpCodes;\n}\nfunction getBindingMask(icuExpression, mask = 0) {\n    mask = mask | toMaskBit(icuExpression.mainBinding);\n    let match;\n    for (let i = 0; i < icuExpression.values.length; i++) {\n        const valueArr = icuExpression.values[i];\n        for (let j = 0; j < valueArr.length; j++) {\n            const value = valueArr[j];\n            if (typeof value === 'string') {\n                while (match = BINDING_REGEXP.exec(value)) {\n                    mask = mask | toMaskBit(parseInt(match[1], 10));\n                }\n            }\n            else {\n                mask = getBindingMask(value, mask);\n            }\n        }\n    }\n    return mask;\n}\nfunction allocNodeIndex(startIndex) {\n    return startIndex + i18nVarsCount++;\n}\n/**\n * Convert binding index to mask bit.\n *\n * Each index represents a single bit on the bit-mask. Because bit-mask only has 32 bits, we make\n * the 32nd bit share all masks for all bindings higher than 32. Since it is extremely rare to have\n * more than 32 bindings this will be hit very rarely. The downside of hitting this corner case is\n * that we will execute binding code more often than necessary. (penalty of performance)\n */\nfunction toMaskBit(bindingIndex) {\n    return 1 << Math.min(bindingIndex, 31);\n}\nfunction isRootTemplateMessage(subTemplateIndex) {\n    return subTemplateIndex === undefined;\n}\n/**\n * Removes everything inside the sub-templates of a message.\n */\nfunction removeInnerTemplateTranslation(message) {\n    let match;\n    let res = '';\n    let index = 0;\n    let inTemplate = false;\n    let tagMatched;\n    while ((match = SUBTEMPLATE_REGEXP.exec(message)) !== null) {\n        if (!inTemplate) {\n            res += message.substring(index, match.index + match[0].length);\n            tagMatched = match[1];\n            inTemplate = true;\n        }\n        else {\n            if (match[0] === `${MARKER}/*${tagMatched}${MARKER}`) {\n                index = match.index;\n                inTemplate = false;\n            }\n        }\n    }\n    ngDevMode &&\n        assertEqual(inTemplate, false, `Tag mismatch: unable to find the end of the sub-template in the translation \"${message}\"`);\n    res += message.substr(index);\n    return res;\n}\n/**\n * Extracts a part of a message and removes the rest.\n *\n * This method is used for extracting a part of the message associated with a template. A translated\n * message can span multiple templates.\n *\n * Example:\n * ```\n * <div i18n>Translate <span *ngIf>me</span>!</div>\n * ```\n *\n * @param message The message to crop\n * @param subTemplateIndex Index of the sub-template to extract. If undefined it returns the\n * external template and removes all sub-templates.\n */\nfunction getTranslationForTemplate(message, subTemplateIndex) {\n    if (isRootTemplateMessage(subTemplateIndex)) {\n        // We want the root template message, ignore all sub-templates\n        return removeInnerTemplateTranslation(message);\n    }\n    else {\n        // We want a specific sub-template\n        const start = message.indexOf(`:${subTemplateIndex}${MARKER}`) + 2 + subTemplateIndex.toString().length;\n        const end = message.search(new RegExp(`${MARKER}\\\\/\\\\*\\\\d+:${subTemplateIndex}${MARKER}`));\n        return removeInnerTemplateTranslation(message.substring(start, end));\n    }\n}\n/**\n * Generate the OpCodes for ICU expressions.\n *\n * @param tIcus\n * @param icuExpression\n * @param startIndex\n * @param expandoStartIndex\n */\nfunction icuStart(tIcus, icuExpression, startIndex, expandoStartIndex) {\n    const createCodes = [];\n    const removeCodes = [];\n    const updateCodes = [];\n    const vars = [];\n    const childIcus = [];\n    const values = icuExpression.values;\n    for (let i = 0; i < values.length; i++) {\n        // Each value is an array of strings & other ICU expressions\n        const valueArr = values[i];\n        const nestedIcus = [];\n        for (let j = 0; j < valueArr.length; j++) {\n            const value = valueArr[j];\n            if (typeof value !== 'string') {\n                // It is an nested ICU expression\n                const icuIndex = nestedIcus.push(value) - 1;\n                // Replace nested ICU expression by a comment node\n                valueArr[j] = `<!--�${icuIndex}�-->`;\n            }\n        }\n        const icuCase = parseIcuCase(valueArr.join(''), startIndex, nestedIcus, tIcus, expandoStartIndex);\n        createCodes.push(icuCase.create);\n        removeCodes.push(icuCase.remove);\n        updateCodes.push(icuCase.update);\n        vars.push(icuCase.vars);\n        childIcus.push(icuCase.childIcus);\n    }\n    const tIcu = {\n        type: icuExpression.type,\n        vars,\n        currentCaseLViewIndex: HEADER_OFFSET +\n            expandoStartIndex // expandoStartIndex does not include the header so add it.\n            + 1,\n        childIcus,\n        cases: icuExpression.cases,\n        create: createCodes,\n        remove: removeCodes,\n        update: updateCodes\n    };\n    tIcus.push(tIcu);\n    // Adding the maximum possible of vars needed (based on the cases with the most vars)\n    i18nVarsCount += Math.max(...vars);\n}\n/**\n * Parses text containing an ICU expression and produces a JSON object for it.\n * Original code from closure library, modified for Angular.\n *\n * @param pattern Text containing an ICU expression that needs to be parsed.\n *\n */\nfunction parseICUBlock(pattern) {\n    const cases = [];\n    const values = [];\n    let icuType = 1 /* plural */;\n    let mainBinding = 0;\n    pattern = pattern.replace(ICU_BLOCK_REGEXP, function (str, binding, type) {\n        if (type === 'select') {\n            icuType = 0 /* select */;\n        }\n        else {\n            icuType = 1 /* plural */;\n        }\n        mainBinding = parseInt(binding.substr(1), 10);\n        return '';\n    });\n    const parts = extractParts(pattern);\n    // Looking for (key block)+ sequence. One of the keys has to be \"other\".\n    for (let pos = 0; pos < parts.length;) {\n        let key = parts[pos++].trim();\n        if (icuType === 1 /* plural */) {\n            // Key can be \"=x\", we just want \"x\"\n            key = key.replace(/\\s*(?:=)?(\\w+)\\s*/, '$1');\n        }\n        if (key.length) {\n            cases.push(key);\n        }\n        const blocks = extractParts(parts[pos++]);\n        if (cases.length > values.length) {\n            values.push(blocks);\n        }\n    }\n    // TODO(ocombe): support ICU expressions in attributes, see #21615\n    return { type: icuType, mainBinding: mainBinding, cases, values };\n}\n/**\n * Transforms a string template into an HTML template and a list of instructions used to update\n * attributes or nodes that contain bindings.\n *\n * @param unsafeHtml The string to parse\n * @param parentIndex\n * @param nestedIcus\n * @param tIcus\n * @param expandoStartIndex\n */\nfunction parseIcuCase(unsafeHtml, parentIndex, nestedIcus, tIcus, expandoStartIndex) {\n    const inertBodyHelper = getInertBodyHelper(getDocument());\n    const inertBodyElement = inertBodyHelper.getInertBodyElement(unsafeHtml);\n    if (!inertBodyElement) {\n        throw new Error('Unable to generate inert body element');\n    }\n    const wrapper = getTemplateContent(inertBodyElement) || inertBodyElement;\n    const opCodes = {\n        vars: 1,\n        childIcus: [],\n        create: [],\n        remove: [],\n        update: []\n    };\n    if (ngDevMode) {\n        attachDebugGetter(opCodes.create, i18nMutateOpCodesToString);\n        attachDebugGetter(opCodes.remove, i18nMutateOpCodesToString);\n        attachDebugGetter(opCodes.update, i18nUpdateOpCodesToString);\n    }\n    parseNodes(wrapper.firstChild, opCodes, parentIndex, nestedIcus, tIcus, expandoStartIndex);\n    return opCodes;\n}\n/**\n * Breaks pattern into strings and top level {...} blocks.\n * Can be used to break a message into text and ICU expressions, or to break an ICU expression into\n * keys and cases.\n * Original code from closure library, modified for Angular.\n *\n * @param pattern (sub)Pattern to be broken.\n *\n */\nfunction extractParts(pattern) {\n    if (!pattern) {\n        return [];\n    }\n    let prevPos = 0;\n    const braceStack = [];\n    const results = [];\n    const braces = /[{}]/g;\n    // lastIndex doesn't get set to 0 so we have to.\n    braces.lastIndex = 0;\n    let match;\n    while (match = braces.exec(pattern)) {\n        const pos = match.index;\n        if (match[0] == '}') {\n            braceStack.pop();\n            if (braceStack.length == 0) {\n                // End of the block.\n                const block = pattern.substring(prevPos, pos);\n                if (ICU_BLOCK_REGEXP.test(block)) {\n                    results.push(parseICUBlock(block));\n                }\n                else {\n                    results.push(block);\n                }\n                prevPos = pos + 1;\n            }\n        }\n        else {\n            if (braceStack.length == 0) {\n                const substring = pattern.substring(prevPos, pos);\n                results.push(substring);\n                prevPos = pos + 1;\n            }\n            braceStack.push('{');\n        }\n    }\n    const substring = pattern.substring(prevPos);\n    results.push(substring);\n    return results;\n}\n/**\n * Parses a node, its children and its siblings, and generates the mutate & update OpCodes.\n *\n * @param currentNode The first node to parse\n * @param icuCase The data for the ICU expression case that contains those nodes\n * @param parentIndex Index of the current node's parent\n * @param nestedIcus Data for the nested ICU expressions that this case contains\n * @param tIcus Data for all ICU expressions of the current message\n * @param expandoStartIndex Expando start index for the current ICU expression\n */\nfunction parseNodes(currentNode, icuCase, parentIndex, nestedIcus, tIcus, expandoStartIndex) {\n    if (currentNode) {\n        const nestedIcusToCreate = [];\n        while (currentNode) {\n            const nextNode = currentNode.nextSibling;\n            const newIndex = expandoStartIndex + ++icuCase.vars;\n            switch (currentNode.nodeType) {\n                case Node.ELEMENT_NODE:\n                    const element = currentNode;\n                    const tagName = element.tagName.toLowerCase();\n                    if (!VALID_ELEMENTS.hasOwnProperty(tagName)) {\n                        // This isn't a valid element, we won't create an element for it\n                        icuCase.vars--;\n                    }\n                    else {\n                        icuCase.create.push(ELEMENT_MARKER, tagName, newIndex, parentIndex << 17 /* SHIFT_PARENT */ | 1 /* AppendChild */);\n                        const elAttrs = element.attributes;\n                        for (let i = 0; i < elAttrs.length; i++) {\n                            const attr = elAttrs.item(i);\n                            const lowerAttrName = attr.name.toLowerCase();\n                            const hasBinding = !!attr.value.match(BINDING_REGEXP);\n                            // we assume the input string is safe, unless it's using a binding\n                            if (hasBinding) {\n                                if (VALID_ATTRS.hasOwnProperty(lowerAttrName)) {\n                                    if (URI_ATTRS[lowerAttrName]) {\n                                        addAllToArray(generateBindingUpdateOpCodes(attr.value, newIndex, attr.name, _sanitizeUrl), icuCase.update);\n                                    }\n                                    else if (SRCSET_ATTRS[lowerAttrName]) {\n                                        addAllToArray(generateBindingUpdateOpCodes(attr.value, newIndex, attr.name, sanitizeSrcset), icuCase.update);\n                                    }\n                                    else {\n                                        addAllToArray(generateBindingUpdateOpCodes(attr.value, newIndex, attr.name), icuCase.update);\n                                    }\n                                }\n                                else {\n                                    ngDevMode &&\n                                        console.warn(`WARNING: ignoring unsafe attribute value ${lowerAttrName} on element ${tagName} (see http://g.co/ng/security#xss)`);\n                                }\n                            }\n                            else {\n                                icuCase.create.push(newIndex << 3 /* SHIFT_REF */ | 4 /* Attr */, attr.name, attr.value);\n                            }\n                        }\n                        // Parse the children of this node (if any)\n                        parseNodes(currentNode.firstChild, icuCase, newIndex, nestedIcus, tIcus, expandoStartIndex);\n                        // Remove the parent node after the children\n                        icuCase.remove.push(newIndex << 3 /* SHIFT_REF */ | 3 /* Remove */);\n                    }\n                    break;\n                case Node.TEXT_NODE:\n                    const value = currentNode.textContent || '';\n                    const hasBinding = value.match(BINDING_REGEXP);\n                    icuCase.create.push(hasBinding ? '' : value, newIndex, parentIndex << 17 /* SHIFT_PARENT */ | 1 /* AppendChild */);\n                    icuCase.remove.push(newIndex << 3 /* SHIFT_REF */ | 3 /* Remove */);\n                    if (hasBinding) {\n                        addAllToArray(generateBindingUpdateOpCodes(value, newIndex), icuCase.update);\n                    }\n                    break;\n                case Node.COMMENT_NODE:\n                    // Check if the comment node is a placeholder for a nested ICU\n                    const match = NESTED_ICU.exec(currentNode.textContent || '');\n                    if (match) {\n                        const nestedIcuIndex = parseInt(match[1], 10);\n                        const newLocal = ngDevMode ? `nested ICU ${nestedIcuIndex}` : '';\n                        // Create the comment node that will anchor the ICU expression\n                        icuCase.create.push(COMMENT_MARKER, newLocal, newIndex, parentIndex << 17 /* SHIFT_PARENT */ | 1 /* AppendChild */);\n                        const nestedIcu = nestedIcus[nestedIcuIndex];\n                        nestedIcusToCreate.push([nestedIcu, newIndex]);\n                    }\n                    else {\n                        // We do not handle any other type of comment\n                        icuCase.vars--;\n                    }\n                    break;\n                default:\n                    // We do not handle any other type of element\n                    icuCase.vars--;\n            }\n            currentNode = nextNode;\n        }\n        for (let i = 0; i < nestedIcusToCreate.length; i++) {\n            const nestedIcu = nestedIcusToCreate[i][0];\n            const nestedIcuNodeIndex = nestedIcusToCreate[i][1];\n            icuStart(tIcus, nestedIcu, nestedIcuNodeIndex, expandoStartIndex + icuCase.vars);\n            // Since this is recursive, the last TIcu that was pushed is the one we want\n            const nestTIcuIndex = tIcus.length - 1;\n            icuCase.vars += Math.max(...tIcus[nestTIcuIndex].vars);\n            icuCase.childIcus.push(nestTIcuIndex);\n            const mask = getBindingMask(nestedIcu);\n            icuCase.update.push(toMaskBit(nestedIcu.mainBinding), // mask of the main binding\n            3, // skip 3 opCodes if not changed\n            -1 - nestedIcu.mainBinding, nestedIcuNodeIndex << 2 /* SHIFT_REF */ | 2 /* IcuSwitch */, \n            // FIXME(misko): Index should be part of the opcode\n            nestTIcuIndex, mask, // mask of all the bindings of this ICU expression\n            2, // skip 2 opCodes if not changed\n            nestedIcuNodeIndex << 2 /* SHIFT_REF */ | 3 /* IcuUpdate */, nestTIcuIndex);\n            icuCase.remove.push(nestTIcuIndex << 3 /* SHIFT_REF */ | 6 /* RemoveNestedIcu */, \n            // FIXME(misko): Index should be part of the opcode\n            nestedIcuNodeIndex << 3 /* SHIFT_REF */ | 3 /* Remove */);\n        }\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// i18nPostprocess consts\nconst ROOT_TEMPLATE_ID = 0;\nconst PP_MULTI_VALUE_PLACEHOLDERS_REGEXP = /\\[(�.+?�?)\\]/;\nconst PP_PLACEHOLDERS_REGEXP = /\\[(�.+?�?)\\]|(�\\/?\\*\\d+:\\d+�)/g;\nconst PP_ICU_VARS_REGEXP = /({\\s*)(VAR_(PLURAL|SELECT)(_\\d+)?)(\\s*,)/g;\nconst PP_ICU_PLACEHOLDERS_REGEXP = /{([A-Z0-9_]+)}/g;\nconst PP_ICUS_REGEXP = /�I18N_EXP_(ICU(_\\d+)?)�/g;\nconst PP_CLOSE_TEMPLATE_REGEXP = /\\/\\*/;\nconst PP_TEMPLATE_ID_REGEXP = /\\d+\\:(\\d+)/;\n/**\n * Handles message string post-processing for internationalization.\n *\n * Handles message string post-processing by transforming it from intermediate\n * format (that might contain some markers that we need to replace) to the final\n * form, consumable by i18nStart instruction. Post processing steps include:\n *\n * 1. Resolve all multi-value cases (like [�*1:1��#2:1�|�#4:1�|�5�])\n * 2. Replace all ICU vars (like \"VAR_PLURAL\")\n * 3. Replace all placeholders used inside ICUs in a form of {PLACEHOLDER}\n * 4. Replace all ICU references with corresponding values (like �ICU_EXP_ICU_1�)\n *    in case multiple ICUs have the same placeholder name\n *\n * @param message Raw translation string for post processing\n * @param replacements Set of replacements that should be applied\n *\n * @returns Transformed string that can be consumed by i18nStart instruction\n *\n * @codeGenApi\n */\nfunction i18nPostprocess(message, replacements = {}) {\n    /**\n     * Step 1: resolve all multi-value placeholders like [�#5�|�*1:1��#2:1�|�#4:1�]\n     *\n     * Note: due to the way we process nested templates (BFS), multi-value placeholders are typically\n     * grouped by templates, for example: [�#5�|�#6�|�#1:1�|�#3:2�] where �#5� and �#6� belong to root\n     * template, �#1:1� belong to nested template with index 1 and �#1:2� - nested template with index\n     * 3. However in real templates the order might be different: i.e. �#1:1� and/or �#3:2� may go in\n     * front of �#6�. The post processing step restores the right order by keeping track of the\n     * template id stack and looks for placeholders that belong to the currently active template.\n     */\n    let result = message;\n    if (PP_MULTI_VALUE_PLACEHOLDERS_REGEXP.test(message)) {\n        const matches = {};\n        const templateIdsStack = [ROOT_TEMPLATE_ID];\n        result = result.replace(PP_PLACEHOLDERS_REGEXP, (m, phs, tmpl) => {\n            const content = phs || tmpl;\n            const placeholders = matches[content] || [];\n            if (!placeholders.length) {\n                content.split('|').forEach((placeholder) => {\n                    const match = placeholder.match(PP_TEMPLATE_ID_REGEXP);\n                    const templateId = match ? parseInt(match[1], 10) : ROOT_TEMPLATE_ID;\n                    const isCloseTemplateTag = PP_CLOSE_TEMPLATE_REGEXP.test(placeholder);\n                    placeholders.push([templateId, isCloseTemplateTag, placeholder]);\n                });\n                matches[content] = placeholders;\n            }\n            if (!placeholders.length) {\n                throw new Error(`i18n postprocess: unmatched placeholder - ${content}`);\n            }\n            const currentTemplateId = templateIdsStack[templateIdsStack.length - 1];\n            let idx = 0;\n            // find placeholder index that matches current template id\n            for (let i = 0; i < placeholders.length; i++) {\n                if (placeholders[i][0] === currentTemplateId) {\n                    idx = i;\n                    break;\n                }\n            }\n            // update template id stack based on the current tag extracted\n            const [templateId, isCloseTemplateTag, placeholder] = placeholders[idx];\n            if (isCloseTemplateTag) {\n                templateIdsStack.pop();\n            }\n            else if (currentTemplateId !== templateId) {\n                templateIdsStack.push(templateId);\n            }\n            // remove processed tag from the list\n            placeholders.splice(idx, 1);\n            return placeholder;\n        });\n    }\n    // return current result if no replacements specified\n    if (!Object.keys(replacements).length) {\n        return result;\n    }\n    /**\n     * Step 2: replace all ICU vars (like \"VAR_PLURAL\")\n     */\n    result = result.replace(PP_ICU_VARS_REGEXP, (match, start, key, _type, _idx, end) => {\n        return replacements.hasOwnProperty(key) ? `${start}${replacements[key]}${end}` : match;\n    });\n    /**\n     * Step 3: replace all placeholders used inside ICUs in a form of {PLACEHOLDER}\n     */\n    result = result.replace(PP_ICU_PLACEHOLDERS_REGEXP, (match, key) => {\n        return replacements.hasOwnProperty(key) ? replacements[key] : match;\n    });\n    /**\n     * Step 4: replace all ICU references with corresponding values (like �ICU_EXP_ICU_1�) in case\n     * multiple ICUs have the same placeholder name\n     */\n    result = result.replace(PP_ICUS_REGEXP, (match, key) => {\n        if (replacements.hasOwnProperty(key)) {\n            const list = replacements[key];\n            if (!list.length) {\n                throw new Error(`i18n postprocess: unmatched ICU - ${match} with key: ${key}`);\n            }\n            return list.shift();\n        }\n        return match;\n    });\n    return result;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Marks a block of text as translatable.\n *\n * The instructions `i18nStart` and `i18nEnd` mark the translation block in the template.\n * The translation `message` is the value which is locale specific. The translation string may\n * contain placeholders which associate inner elements and sub-templates within the translation.\n *\n * The translation `message` placeholders are:\n * - `�{index}(:{block})�`: *Binding Placeholder*: Marks a location where an expression will be\n *   interpolated into. The placeholder `index` points to the expression binding index. An optional\n *   `block` that matches the sub-template in which it was declared.\n * - `�#{index}(:{block})�`/`�/#{index}(:{block})�`: *Element Placeholder*:  Marks the beginning\n *   and end of DOM element that were embedded in the original translation block. The placeholder\n *   `index` points to the element index in the template instructions set. An optional `block` that\n *   matches the sub-template in which it was declared.\n * - `�!{index}(:{block})�`/`�/!{index}(:{block})�`: *Projection Placeholder*:  Marks the\n *   beginning and end of <ng-content> that was embedded in the original translation block.\n *   The placeholder `index` points to the element index in the template instructions set.\n *   An optional `block` that matches the sub-template in which it was declared.\n * - `�*{index}:{block}�`/`�/*{index}:{block}�`: *Sub-template Placeholder*: Sub-templates must be\n *   split up and translated separately in each angular template function. The `index` points to the\n *   `template` instruction index. A `block` that matches the sub-template in which it was declared.\n *\n * @param index A unique index of the translation in the static block.\n * @param messageIndex An index of the translation message from the `def.consts` array.\n * @param subTemplateIndex Optional sub-template index in the `message`.\n *\n * @codeGenApi\n */\nfunction ɵɵi18nStart(index, messageIndex, subTemplateIndex) {\n    const tView = getTView();\n    ngDevMode && assertDefined(tView, `tView should be defined`);\n    const message = getConstant(tView.consts, messageIndex);\n    pushI18nIndex(index);\n    // We need to delay projections until `i18nEnd`\n    setDelayProjection(true);\n    if (tView.firstCreatePass && tView.data[index + HEADER_OFFSET] === null) {\n        i18nStartFirstPass(getLView(), tView, index, message, subTemplateIndex);\n    }\n}\n/**\n * Translates a translation block marked by `i18nStart` and `i18nEnd`. It inserts the text/ICU nodes\n * into the render tree, moves the placeholder nodes and removes the deleted nodes.\n *\n * @codeGenApi\n */\nfunction ɵɵi18nEnd() {\n    const lView = getLView();\n    const tView = getTView();\n    ngDevMode && assertDefined(tView, `tView should be defined`);\n    i18nEndFirstPass(tView, lView);\n    // Stop delaying projections\n    setDelayProjection(false);\n}\n/**\n *\n * Use this instruction to create a translation block that doesn't contain any placeholder.\n * It calls both {@link i18nStart} and {@link i18nEnd} in one instruction.\n *\n * The translation `message` is the value which is locale specific. The translation string may\n * contain placeholders which associate inner elements and sub-templates within the translation.\n *\n * The translation `message` placeholders are:\n * - `�{index}(:{block})�`: *Binding Placeholder*: Marks a location where an expression will be\n *   interpolated into. The placeholder `index` points to the expression binding index. An optional\n *   `block` that matches the sub-template in which it was declared.\n * - `�#{index}(:{block})�`/`�/#{index}(:{block})�`: *Element Placeholder*:  Marks the beginning\n *   and end of DOM element that were embedded in the original translation block. The placeholder\n *   `index` points to the element index in the template instructions set. An optional `block` that\n *   matches the sub-template in which it was declared.\n * - `�*{index}:{block}�`/`�/*{index}:{block}�`: *Sub-template Placeholder*: Sub-templates must be\n *   split up and translated separately in each angular template function. The `index` points to the\n *   `template` instruction index. A `block` that matches the sub-template in which it was declared.\n *\n * @param index A unique index of the translation in the static block.\n * @param messageIndex An index of the translation message from the `def.consts` array.\n * @param subTemplateIndex Optional sub-template index in the `message`.\n *\n * @codeGenApi\n */\nfunction ɵɵi18n(index, messageIndex, subTemplateIndex) {\n    ɵɵi18nStart(index, messageIndex, subTemplateIndex);\n    ɵɵi18nEnd();\n}\n/**\n * Marks a list of attributes as translatable.\n *\n * @param index A unique index in the static block\n * @param values\n *\n * @codeGenApi\n */\nfunction ɵɵi18nAttributes(index, attrsIndex) {\n    const lView = getLView();\n    const tView = getTView();\n    ngDevMode && assertDefined(tView, `tView should be defined`);\n    const attrs = getConstant(tView.consts, attrsIndex);\n    i18nAttributesFirstPass(lView, tView, index, attrs);\n}\n/**\n * Stores the values of the bindings during each update cycle in order to determine if we need to\n * update the translated nodes.\n *\n * @param value The binding's value\n * @returns This function returns itself so that it may be chained\n * (e.g. `i18nExp(ctx.name)(ctx.title)`)\n *\n * @codeGenApi\n */\nfunction ɵɵi18nExp(value) {\n    const lView = getLView();\n    setMaskBit(bindingUpdated(lView, nextBindingIndex(), value));\n    return ɵɵi18nExp;\n}\n/**\n * Updates a translation block or an i18n attribute when the bindings have changed.\n *\n * @param index Index of either {@link i18nStart} (translation block) or {@link i18nAttributes}\n * (i18n attribute) on which it should update the content.\n *\n * @codeGenApi\n */\nfunction ɵɵi18nApply(index) {\n    applyI18n(getTView(), getLView(), index);\n}\n/**\n * Handles message string post-processing for internationalization.\n *\n * Handles message string post-processing by transforming it from intermediate\n * format (that might contain some markers that we need to replace) to the final\n * form, consumable by i18nStart instruction. Post processing steps include:\n *\n * 1. Resolve all multi-value cases (like [�*1:1��#2:1�|�#4:1�|�5�])\n * 2. Replace all ICU vars (like \"VAR_PLURAL\")\n * 3. Replace all placeholders used inside ICUs in a form of {PLACEHOLDER}\n * 4. Replace all ICU references with corresponding values (like �ICU_EXP_ICU_1�)\n *    in case multiple ICUs have the same placeholder name\n *\n * @param message Raw translation string for post processing\n * @param replacements Set of replacements that should be applied\n *\n * @returns Transformed string that can be consumed by i18nStart instruction\n *\n * @codeGenApi\n */\nfunction ɵɵi18nPostprocess(message, replacements = {}) {\n    return i18nPostprocess(message, replacements);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Adds decorator, constructor, and property metadata to a given type via static metadata fields\n * on the type.\n *\n * These metadata fields can later be read with Angular's `ReflectionCapabilities` API.\n *\n * Calls to `setClassMetadata` can be marked as pure, resulting in the metadata assignments being\n * tree-shaken away during production builds.\n */\nfunction setClassMetadata(type, decorators, ctorParameters, propDecorators) {\n    return noSideEffects(() => {\n        const clazz = type;\n        // We determine whether a class has its own metadata by taking the metadata from the\n        // parent constructor and checking whether it's the same as the subclass metadata below.\n        // We can't use `hasOwnProperty` here because it doesn't work correctly in IE10 for\n        // static fields that are defined by TS. See\n        // https://github.com/angular/angular/pull/28439#issuecomment-459349218.\n        const parentPrototype = clazz.prototype ? Object.getPrototypeOf(clazz.prototype) : null;\n        const parentConstructor = parentPrototype && parentPrototype.constructor;\n        if (decorators !== null) {\n            if (clazz.decorators !== undefined &&\n                (!parentConstructor || parentConstructor.decorators !== clazz.decorators)) {\n                clazz.decorators.push(...decorators);\n            }\n            else {\n                clazz.decorators = decorators;\n            }\n        }\n        if (ctorParameters !== null) {\n            // Rather than merging, clobber the existing parameters. If other projects exist which\n            // use tsickle-style annotations and reflect over them in the same way, this could\n            // cause issues, but that is vanishingly unlikely.\n            clazz.ctorParameters = ctorParameters;\n        }\n        if (propDecorators !== null) {\n            // The property decorator objects are merged as it is possible different fields have\n            // different decorator types. Decorators on individual fields are not merged, as it's\n            // also incredibly unlikely that a field will be decorated both with an Angular\n            // decorator and a non-Angular decorator that's also been downleveled.\n            if (clazz.propDecorators !== undefined &&\n                (!parentConstructor ||\n                    parentConstructor.propDecorators !== clazz.propDecorators)) {\n                clazz.propDecorators = Object.assign(Object.assign({}, clazz.propDecorators), propDecorators);\n            }\n            else {\n                clazz.propDecorators = propDecorators;\n            }\n        }\n    });\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Map of module-id to the corresponding NgModule.\n * - In pre Ivy we track NgModuleFactory,\n * - In post Ivy we track the NgModuleType\n */\nconst modules = new Map();\n/**\n * Registers a loaded module. Should only be called from generated NgModuleFactory code.\n * @publicApi\n */\nfunction registerModuleFactory(id, factory) {\n    const existing = modules.get(id);\n    assertSameOrNotExisting(id, existing && existing.moduleType, factory.moduleType);\n    modules.set(id, factory);\n}\nfunction assertSameOrNotExisting(id, type, incoming) {\n    if (type && type !== incoming) {\n        throw new Error(`Duplicate module registered for ${id} - ${stringify(type)} vs ${stringify(type.name)}`);\n    }\n}\nfunction registerNgModuleType(ngModuleType) {\n    if (ngModuleType.ɵmod.id !== null) {\n        const id = ngModuleType.ɵmod.id;\n        const existing = modules.get(id);\n        assertSameOrNotExisting(id, existing, ngModuleType);\n        modules.set(id, ngModuleType);\n    }\n    let imports = ngModuleType.ɵmod.imports;\n    if (imports instanceof Function) {\n        imports = imports();\n    }\n    if (imports) {\n        imports.forEach(i => registerNgModuleType(i));\n    }\n}\nfunction clearModulesForTest() {\n    modules.clear();\n}\nfunction getRegisteredNgModuleType(id) {\n    return modules.get(id) || autoRegisterModuleById[id];\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass NgModuleRef$1 extends NgModuleRef {\n    constructor(ngModuleType, _parent) {\n        super();\n        this._parent = _parent;\n        // tslint:disable-next-line:require-internal-with-underscore\n        this._bootstrapComponents = [];\n        this.injector = this;\n        this.destroyCbs = [];\n        // When bootstrapping a module we have a dependency graph that looks like this:\n        // ApplicationRef -> ComponentFactoryResolver -> NgModuleRef. The problem is that if the\n        // module being resolved tries to inject the ComponentFactoryResolver, it'll create a\n        // circular dependency which will result in a runtime error, because the injector doesn't\n        // exist yet. We work around the issue by creating the ComponentFactoryResolver ourselves\n        // and providing it, rather than letting the injector resolve it.\n        this.componentFactoryResolver = new ComponentFactoryResolver$1(this);\n        const ngModuleDef = getNgModuleDef(ngModuleType);\n        ngDevMode &&\n            assertDefined(ngModuleDef, `NgModule '${stringify(ngModuleType)}' is not a subtype of 'NgModuleType'.`);\n        const ngLocaleIdDef = getNgLocaleIdDef(ngModuleType);\n        ngLocaleIdDef && setLocaleId(ngLocaleIdDef);\n        this._bootstrapComponents = maybeUnwrapFn(ngModuleDef.bootstrap);\n        this._r3Injector = createInjectorWithoutInjectorInstances(ngModuleType, _parent, [\n            { provide: NgModuleRef, useValue: this }, {\n                provide: ComponentFactoryResolver,\n                useValue: this.componentFactoryResolver\n            }\n        ], stringify(ngModuleType));\n        // We need to resolve the injector types separately from the injector creation, because\n        // the module might be trying to use this ref in its contructor for DI which will cause a\n        // circular error that will eventually error out, because the injector isn't created yet.\n        this._r3Injector._resolveInjectorDefTypes();\n        this.instance = this.get(ngModuleType);\n    }\n    get(token, notFoundValue = Injector.THROW_IF_NOT_FOUND, injectFlags = InjectFlags.Default) {\n        if (token === Injector || token === NgModuleRef || token === INJECTOR) {\n            return this;\n        }\n        return this._r3Injector.get(token, notFoundValue, injectFlags);\n    }\n    destroy() {\n        ngDevMode && assertDefined(this.destroyCbs, 'NgModule already destroyed');\n        const injector = this._r3Injector;\n        !injector.destroyed && injector.destroy();\n        this.destroyCbs.forEach(fn => fn());\n        this.destroyCbs = null;\n    }\n    onDestroy(callback) {\n        ngDevMode && assertDefined(this.destroyCbs, 'NgModule already destroyed');\n        this.destroyCbs.push(callback);\n    }\n}\nclass NgModuleFactory$1 extends NgModuleFactory {\n    constructor(moduleType) {\n        super();\n        this.moduleType = moduleType;\n        const ngModuleDef = getNgModuleDef(moduleType);\n        if (ngModuleDef !== null) {\n            // Register the NgModule with Angular's module registry. The location (and hence timing) of\n            // this call is critical to ensure this works correctly (modules get registered when expected)\n            // without bloating bundles (modules are registered when otherwise not referenced).\n            //\n            // In View Engine, registration occurs in the .ngfactory.js file as a side effect. This has\n            // several practical consequences:\n            //\n            // - If an .ngfactory file is not imported from, the module won't be registered (and can be\n            //   tree shaken).\n            // - If an .ngfactory file is imported from, the module will be registered even if an instance\n            //   is not actually created (via `create` below).\n            // - Since an .ngfactory file in View Engine references the .ngfactory files of the NgModule's\n            //   imports,\n            //\n            // In Ivy, things are a bit different. .ngfactory files still exist for compatibility, but are\n            // not a required API to use - there are other ways to obtain an NgModuleFactory for a given\n            // NgModule. Thus, relying on a side effect in the .ngfactory file is not sufficient. Instead,\n            // the side effect of registration is added here, in the constructor of NgModuleFactory,\n            // ensuring no matter how a factory is created, the module is registered correctly.\n            //\n            // An alternative would be to include the registration side effect inline following the actual\n            // NgModule definition. This also has the correct timing, but breaks tree-shaking - modules\n            // will be registered and retained even if they're otherwise never referenced.\n            registerNgModuleType(moduleType);\n        }\n    }\n    create(parentInjector) {\n        return new NgModuleRef$1(this.moduleType, parentInjector);\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Bindings for pure functions are stored after regular bindings.\n *\n * |-------decls------|---------vars---------|                 |----- hostVars (dir1) ------|\n * ------------------------------------------------------------------------------------------\n * | nodes/refs/pipes | bindings | fn slots  | injector | dir1 | host bindings | host slots |\n * ------------------------------------------------------------------------------------------\n *                    ^                      ^\n *      TView.bindingStartIndex      TView.expandoStartIndex\n *\n * Pure function instructions are given an offset from the binding root. Adding the offset to the\n * binding root gives the first index where the bindings are stored. In component views, the binding\n * root is the bindingStartIndex. In host bindings, the binding root is the expandoStartIndex +\n * any directive instances + any hostVars in directives evaluated before it.\n *\n * See VIEW_DATA.md for more information about host binding resolution.\n */\n/**\n * If the value hasn't been saved, calls the pure function to store and return the\n * value. If it has been saved, returns the saved value.\n *\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn Function that returns a value\n * @param thisArg Optional calling context of pureFn\n * @returns value\n *\n * @codeGenApi\n */\nfunction ɵɵpureFunction0(slotOffset, pureFn, thisArg) {\n    const bindingIndex = getBindingRoot() + slotOffset;\n    const lView = getLView();\n    return lView[bindingIndex] === NO_CHANGE ?\n        updateBinding(lView, bindingIndex, thisArg ? pureFn.call(thisArg) : pureFn()) :\n        getBinding(lView, bindingIndex);\n}\n/**\n * If the value of the provided exp has changed, calls the pure function to return\n * an updated value. Or if the value has not changed, returns cached value.\n *\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn Function that returns an updated value\n * @param exp Updated expression value\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n *\n * @codeGenApi\n */\nfunction ɵɵpureFunction1(slotOffset, pureFn, exp, thisArg) {\n    return pureFunction1Internal(getLView(), getBindingRoot(), slotOffset, pureFn, exp, thisArg);\n}\n/**\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn\n * @param exp1\n * @param exp2\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n *\n * @codeGenApi\n */\nfunction ɵɵpureFunction2(slotOffset, pureFn, exp1, exp2, thisArg) {\n    return pureFunction2Internal(getLView(), getBindingRoot(), slotOffset, pureFn, exp1, exp2, thisArg);\n}\n/**\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn\n * @param exp1\n * @param exp2\n * @param exp3\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n *\n * @codeGenApi\n */\nfunction ɵɵpureFunction3(slotOffset, pureFn, exp1, exp2, exp3, thisArg) {\n    return pureFunction3Internal(getLView(), getBindingRoot(), slotOffset, pureFn, exp1, exp2, exp3, thisArg);\n}\n/**\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn\n * @param exp1\n * @param exp2\n * @param exp3\n * @param exp4\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n *\n * @codeGenApi\n */\nfunction ɵɵpureFunction4(slotOffset, pureFn, exp1, exp2, exp3, exp4, thisArg) {\n    return pureFunction4Internal(getLView(), getBindingRoot(), slotOffset, pureFn, exp1, exp2, exp3, exp4, thisArg);\n}\n/**\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn\n * @param exp1\n * @param exp2\n * @param exp3\n * @param exp4\n * @param exp5\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n *\n * @codeGenApi\n */\nfunction ɵɵpureFunction5(slotOffset, pureFn, exp1, exp2, exp3, exp4, exp5, thisArg) {\n    const bindingIndex = getBindingRoot() + slotOffset;\n    const lView = getLView();\n    const different = bindingUpdated4(lView, bindingIndex, exp1, exp2, exp3, exp4);\n    return bindingUpdated(lView, bindingIndex + 4, exp5) || different ?\n        updateBinding(lView, bindingIndex + 5, thisArg ? pureFn.call(thisArg, exp1, exp2, exp3, exp4, exp5) :\n            pureFn(exp1, exp2, exp3, exp4, exp5)) :\n        getBinding(lView, bindingIndex + 5);\n}\n/**\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn\n * @param exp1\n * @param exp2\n * @param exp3\n * @param exp4\n * @param exp5\n * @param exp6\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n *\n * @codeGenApi\n */\nfunction ɵɵpureFunction6(slotOffset, pureFn, exp1, exp2, exp3, exp4, exp5, exp6, thisArg) {\n    const bindingIndex = getBindingRoot() + slotOffset;\n    const lView = getLView();\n    const different = bindingUpdated4(lView, bindingIndex, exp1, exp2, exp3, exp4);\n    return bindingUpdated2(lView, bindingIndex + 4, exp5, exp6) || different ?\n        updateBinding(lView, bindingIndex + 6, thisArg ? pureFn.call(thisArg, exp1, exp2, exp3, exp4, exp5, exp6) :\n            pureFn(exp1, exp2, exp3, exp4, exp5, exp6)) :\n        getBinding(lView, bindingIndex + 6);\n}\n/**\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn\n * @param exp1\n * @param exp2\n * @param exp3\n * @param exp4\n * @param exp5\n * @param exp6\n * @param exp7\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n *\n * @codeGenApi\n */\nfunction ɵɵpureFunction7(slotOffset, pureFn, exp1, exp2, exp3, exp4, exp5, exp6, exp7, thisArg) {\n    const bindingIndex = getBindingRoot() + slotOffset;\n    const lView = getLView();\n    let different = bindingUpdated4(lView, bindingIndex, exp1, exp2, exp3, exp4);\n    return bindingUpdated3(lView, bindingIndex + 4, exp5, exp6, exp7) || different ?\n        updateBinding(lView, bindingIndex + 7, thisArg ? pureFn.call(thisArg, exp1, exp2, exp3, exp4, exp5, exp6, exp7) :\n            pureFn(exp1, exp2, exp3, exp4, exp5, exp6, exp7)) :\n        getBinding(lView, bindingIndex + 7);\n}\n/**\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn\n * @param exp1\n * @param exp2\n * @param exp3\n * @param exp4\n * @param exp5\n * @param exp6\n * @param exp7\n * @param exp8\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n *\n * @codeGenApi\n */\nfunction ɵɵpureFunction8(slotOffset, pureFn, exp1, exp2, exp3, exp4, exp5, exp6, exp7, exp8, thisArg) {\n    const bindingIndex = getBindingRoot() + slotOffset;\n    const lView = getLView();\n    const different = bindingUpdated4(lView, bindingIndex, exp1, exp2, exp3, exp4);\n    return bindingUpdated4(lView, bindingIndex + 4, exp5, exp6, exp7, exp8) || different ?\n        updateBinding(lView, bindingIndex + 8, thisArg ? pureFn.call(thisArg, exp1, exp2, exp3, exp4, exp5, exp6, exp7, exp8) :\n            pureFn(exp1, exp2, exp3, exp4, exp5, exp6, exp7, exp8)) :\n        getBinding(lView, bindingIndex + 8);\n}\n/**\n * pureFunction instruction that can support any number of bindings.\n *\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn A pure function that takes binding values and builds an object or array\n * containing those values.\n * @param exps An array of binding values\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n *\n * @codeGenApi\n */\nfunction ɵɵpureFunctionV(slotOffset, pureFn, exps, thisArg) {\n    return pureFunctionVInternal(getLView(), getBindingRoot(), slotOffset, pureFn, exps, thisArg);\n}\n/**\n * Results of a pure function invocation are stored in LView in a dedicated slot that is initialized\n * to NO_CHANGE. In rare situations a pure pipe might throw an exception on the very first\n * invocation and not produce any valid results. In this case LView would keep holding the NO_CHANGE\n * value. The NO_CHANGE is not something that we can use in expressions / bindings thus we convert\n * it to `undefined`.\n */\nfunction getPureFunctionReturnValue(lView, returnValueIndex) {\n    ngDevMode && assertIndexInRange(lView, returnValueIndex);\n    const lastReturnValue = lView[returnValueIndex];\n    return lastReturnValue === NO_CHANGE ? undefined : lastReturnValue;\n}\n/**\n * If the value of the provided exp has changed, calls the pure function to return\n * an updated value. Or if the value has not changed, returns cached value.\n *\n * @param lView LView in which the function is being executed.\n * @param bindingRoot Binding root index.\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn Function that returns an updated value\n * @param exp Updated expression value\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n */\nfunction pureFunction1Internal(lView, bindingRoot, slotOffset, pureFn, exp, thisArg) {\n    const bindingIndex = bindingRoot + slotOffset;\n    return bindingUpdated(lView, bindingIndex, exp) ?\n        updateBinding(lView, bindingIndex + 1, thisArg ? pureFn.call(thisArg, exp) : pureFn(exp)) :\n        getPureFunctionReturnValue(lView, bindingIndex + 1);\n}\n/**\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param lView LView in which the function is being executed.\n * @param bindingRoot Binding root index.\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn\n * @param exp1\n * @param exp2\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n */\nfunction pureFunction2Internal(lView, bindingRoot, slotOffset, pureFn, exp1, exp2, thisArg) {\n    const bindingIndex = bindingRoot + slotOffset;\n    return bindingUpdated2(lView, bindingIndex, exp1, exp2) ?\n        updateBinding(lView, bindingIndex + 2, thisArg ? pureFn.call(thisArg, exp1, exp2) : pureFn(exp1, exp2)) :\n        getPureFunctionReturnValue(lView, bindingIndex + 2);\n}\n/**\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param lView LView in which the function is being executed.\n * @param bindingRoot Binding root index.\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn\n * @param exp1\n * @param exp2\n * @param exp3\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n */\nfunction pureFunction3Internal(lView, bindingRoot, slotOffset, pureFn, exp1, exp2, exp3, thisArg) {\n    const bindingIndex = bindingRoot + slotOffset;\n    return bindingUpdated3(lView, bindingIndex, exp1, exp2, exp3) ?\n        updateBinding(lView, bindingIndex + 3, thisArg ? pureFn.call(thisArg, exp1, exp2, exp3) : pureFn(exp1, exp2, exp3)) :\n        getPureFunctionReturnValue(lView, bindingIndex + 3);\n}\n/**\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param lView LView in which the function is being executed.\n * @param bindingRoot Binding root index.\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn\n * @param exp1\n * @param exp2\n * @param exp3\n * @param exp4\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n *\n */\nfunction pureFunction4Internal(lView, bindingRoot, slotOffset, pureFn, exp1, exp2, exp3, exp4, thisArg) {\n    const bindingIndex = bindingRoot + slotOffset;\n    return bindingUpdated4(lView, bindingIndex, exp1, exp2, exp3, exp4) ?\n        updateBinding(lView, bindingIndex + 4, thisArg ? pureFn.call(thisArg, exp1, exp2, exp3, exp4) : pureFn(exp1, exp2, exp3, exp4)) :\n        getPureFunctionReturnValue(lView, bindingIndex + 4);\n}\n/**\n * pureFunction instruction that can support any number of bindings.\n *\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param lView LView in which the function is being executed.\n * @param bindingRoot Binding root index.\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn A pure function that takes binding values and builds an object or array\n * containing those values.\n * @param exps An array of binding values\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n */\nfunction pureFunctionVInternal(lView, bindingRoot, slotOffset, pureFn, exps, thisArg) {\n    let bindingIndex = bindingRoot + slotOffset;\n    let different = false;\n    for (let i = 0; i < exps.length; i++) {\n        bindingUpdated(lView, bindingIndex++, exps[i]) && (different = true);\n    }\n    return different ? updateBinding(lView, bindingIndex, pureFn.apply(thisArg, exps)) :\n        getPureFunctionReturnValue(lView, bindingIndex);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Create a pipe.\n *\n * @param index Pipe index where the pipe will be stored.\n * @param pipeName The name of the pipe\n * @returns T the instance of the pipe.\n *\n * @codeGenApi\n */\nfunction ɵɵpipe(index, pipeName) {\n    const tView = getTView();\n    let pipeDef;\n    const adjustedIndex = index + HEADER_OFFSET;\n    if (tView.firstCreatePass) {\n        pipeDef = getPipeDef$1(pipeName, tView.pipeRegistry);\n        tView.data[adjustedIndex] = pipeDef;\n        if (pipeDef.onDestroy) {\n            (tView.destroyHooks || (tView.destroyHooks = [])).push(adjustedIndex, pipeDef.onDestroy);\n        }\n    }\n    else {\n        pipeDef = tView.data[adjustedIndex];\n    }\n    const pipeFactory = pipeDef.factory || (pipeDef.factory = getFactoryDef(pipeDef.type, true));\n    const previousInjectImplementation = setInjectImplementation(ɵɵdirectiveInject);\n    // DI for pipes is supposed to behave like directives when placed on a component\n    // host node, which means that we have to disable access to `viewProviders`.\n    const previousIncludeViewProviders = setIncludeViewProviders(false);\n    const pipeInstance = pipeFactory();\n    setIncludeViewProviders(previousIncludeViewProviders);\n    setInjectImplementation(previousInjectImplementation);\n    store(tView, getLView(), index, pipeInstance);\n    return pipeInstance;\n}\n/**\n * Searches the pipe registry for a pipe with the given name. If one is found,\n * returns the pipe. Otherwise, an error is thrown because the pipe cannot be resolved.\n *\n * @param name Name of pipe to resolve\n * @param registry Full list of available pipes\n * @returns Matching PipeDef\n */\nfunction getPipeDef$1(name, registry) {\n    if (registry) {\n        for (let i = registry.length - 1; i >= 0; i--) {\n            const pipeDef = registry[i];\n            if (name === pipeDef.name) {\n                return pipeDef;\n            }\n        }\n    }\n    throw new Error(`The pipe '${name}' could not be found!`);\n}\n/**\n * Invokes a pipe with 1 arguments.\n *\n * This instruction acts as a guard to {@link PipeTransform#transform} invoking\n * the pipe only when an input to the pipe changes.\n *\n * @param index Pipe index where the pipe was stored on creation.\n * @param slotOffset the offset in the reserved slot space\n * @param v1 1st argument to {@link PipeTransform#transform}.\n *\n * @codeGenApi\n */\nfunction ɵɵpipeBind1(index, slotOffset, v1) {\n    const lView = getLView();\n    const pipeInstance = load(lView, index);\n    return unwrapValue$1(lView, isPure(lView, index) ?\n        pureFunction1Internal(lView, getBindingRoot(), slotOffset, pipeInstance.transform, v1, pipeInstance) :\n        pipeInstance.transform(v1));\n}\n/**\n * Invokes a pipe with 2 arguments.\n *\n * This instruction acts as a guard to {@link PipeTransform#transform} invoking\n * the pipe only when an input to the pipe changes.\n *\n * @param index Pipe index where the pipe was stored on creation.\n * @param slotOffset the offset in the reserved slot space\n * @param v1 1st argument to {@link PipeTransform#transform}.\n * @param v2 2nd argument to {@link PipeTransform#transform}.\n *\n * @codeGenApi\n */\nfunction ɵɵpipeBind2(index, slotOffset, v1, v2) {\n    const lView = getLView();\n    const pipeInstance = load(lView, index);\n    return unwrapValue$1(lView, isPure(lView, index) ?\n        pureFunction2Internal(lView, getBindingRoot(), slotOffset, pipeInstance.transform, v1, v2, pipeInstance) :\n        pipeInstance.transform(v1, v2));\n}\n/**\n * Invokes a pipe with 3 arguments.\n *\n * This instruction acts as a guard to {@link PipeTransform#transform} invoking\n * the pipe only when an input to the pipe changes.\n *\n * @param index Pipe index where the pipe was stored on creation.\n * @param slotOffset the offset in the reserved slot space\n * @param v1 1st argument to {@link PipeTransform#transform}.\n * @param v2 2nd argument to {@link PipeTransform#transform}.\n * @param v3 4rd argument to {@link PipeTransform#transform}.\n *\n * @codeGenApi\n */\nfunction ɵɵpipeBind3(index, slotOffset, v1, v2, v3) {\n    const lView = getLView();\n    const pipeInstance = load(lView, index);\n    return unwrapValue$1(lView, isPure(lView, index) ? pureFunction3Internal(lView, getBindingRoot(), slotOffset, pipeInstance.transform, v1, v2, v3, pipeInstance) :\n        pipeInstance.transform(v1, v2, v3));\n}\n/**\n * Invokes a pipe with 4 arguments.\n *\n * This instruction acts as a guard to {@link PipeTransform#transform} invoking\n * the pipe only when an input to the pipe changes.\n *\n * @param index Pipe index where the pipe was stored on creation.\n * @param slotOffset the offset in the reserved slot space\n * @param v1 1st argument to {@link PipeTransform#transform}.\n * @param v2 2nd argument to {@link PipeTransform#transform}.\n * @param v3 3rd argument to {@link PipeTransform#transform}.\n * @param v4 4th argument to {@link PipeTransform#transform}.\n *\n * @codeGenApi\n */\nfunction ɵɵpipeBind4(index, slotOffset, v1, v2, v3, v4) {\n    const lView = getLView();\n    const pipeInstance = load(lView, index);\n    return unwrapValue$1(lView, isPure(lView, index) ? pureFunction4Internal(lView, getBindingRoot(), slotOffset, pipeInstance.transform, v1, v2, v3, v4, pipeInstance) :\n        pipeInstance.transform(v1, v2, v3, v4));\n}\n/**\n * Invokes a pipe with variable number of arguments.\n *\n * This instruction acts as a guard to {@link PipeTransform#transform} invoking\n * the pipe only when an input to the pipe changes.\n *\n * @param index Pipe index where the pipe was stored on creation.\n * @param slotOffset the offset in the reserved slot space\n * @param values Array of arguments to pass to {@link PipeTransform#transform} method.\n *\n * @codeGenApi\n */\nfunction ɵɵpipeBindV(index, slotOffset, values) {\n    const lView = getLView();\n    const pipeInstance = load(lView, index);\n    return unwrapValue$1(lView, isPure(lView, index) ?\n        pureFunctionVInternal(lView, getBindingRoot(), slotOffset, pipeInstance.transform, values, pipeInstance) :\n        pipeInstance.transform.apply(pipeInstance, values));\n}\nfunction isPure(lView, index) {\n    return lView[TVIEW].data[index + HEADER_OFFSET].pure;\n}\n/**\n * Unwrap the output of a pipe transformation.\n * In order to trick change detection into considering that the new value is always different from\n * the old one, the old value is overwritten by NO_CHANGE.\n *\n * @param newValue the pipe transformation output.\n */\nfunction unwrapValue$1(lView, newValue) {\n    if (WrappedValue.isWrapped(newValue)) {\n        newValue = WrappedValue.unwrap(newValue);\n        // The NO_CHANGE value needs to be written at the index where the impacted binding value is\n        // stored\n        const bindingToInvalidateIdx = getBindingIndex();\n        lView[bindingToInvalidateIdx] = NO_CHANGE;\n    }\n    return newValue;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass EventEmitter_ extends Subject {\n    constructor(isAsync = false) {\n        super();\n        this.__isAsync = isAsync;\n    }\n    emit(value) {\n        super.next(value);\n    }\n    subscribe(generatorOrNext, error, complete) {\n        let schedulerFn;\n        let errorFn = (err) => null;\n        let completeFn = () => null;\n        if (generatorOrNext && typeof generatorOrNext === 'object') {\n            schedulerFn = this.__isAsync ? (value) => {\n                setTimeout(() => generatorOrNext.next(value));\n            } : (value) => {\n                generatorOrNext.next(value);\n            };\n            if (generatorOrNext.error) {\n                errorFn = this.__isAsync ? (err) => {\n                    setTimeout(() => generatorOrNext.error(err));\n                } : (err) => {\n                    generatorOrNext.error(err);\n                };\n            }\n            if (generatorOrNext.complete) {\n                completeFn = this.__isAsync ? () => {\n                    setTimeout(() => generatorOrNext.complete());\n                } : () => {\n                    generatorOrNext.complete();\n                };\n            }\n        }\n        else {\n            schedulerFn = this.__isAsync ? (value) => {\n                setTimeout(() => generatorOrNext(value));\n            } : (value) => {\n                generatorOrNext(value);\n            };\n            if (error) {\n                errorFn = this.__isAsync ? (err) => {\n                    setTimeout(() => error(err));\n                } : (err) => {\n                    error(err);\n                };\n            }\n            if (complete) {\n                completeFn = this.__isAsync ? () => {\n                    setTimeout(() => complete());\n                } : () => {\n                    complete();\n                };\n            }\n        }\n        const sink = super.subscribe(schedulerFn, errorFn, completeFn);\n        if (generatorOrNext instanceof Subscription) {\n            generatorOrNext.add(sink);\n        }\n        return sink;\n    }\n}\n/**\n * @publicApi\n */\nconst EventEmitter = EventEmitter_;\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction symbolIterator() {\n    return this._results[getSymbolIterator()]();\n}\n/**\n * An unmodifiable list of items that Angular keeps up to date when the state\n * of the application changes.\n *\n * The type of object that {@link ViewChildren}, {@link ContentChildren}, and {@link QueryList}\n * provide.\n *\n * Implements an iterable interface, therefore it can be used in both ES6\n * javascript `for (var i of items)` loops as well as in Angular templates with\n * `*ngFor=\"let i of myList\"`.\n *\n * Changes can be observed by subscribing to the changes `Observable`.\n *\n * NOTE: In the future this class will implement an `Observable` interface.\n *\n * @usageNotes\n * ### Example\n * ```typescript\n * @Component({...})\n * class Container {\n *   @ViewChildren(Item) items:QueryList<Item>;\n * }\n * ```\n *\n * @publicApi\n */\nclass QueryList {\n    constructor() {\n        this.dirty = true;\n        this._results = [];\n        this.changes = new EventEmitter();\n        this.length = 0;\n        // This function should be declared on the prototype, but doing so there will cause the class\n        // declaration to have side-effects and become not tree-shakable. For this reason we do it in\n        // the constructor.\n        // [getSymbolIterator()](): Iterator<T> { ... }\n        const symbol = getSymbolIterator();\n        const proto = QueryList.prototype;\n        if (!proto[symbol])\n            proto[symbol] = symbolIterator;\n    }\n    /**\n     * See\n     * [Array.map](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map)\n     */\n    map(fn) {\n        return this._results.map(fn);\n    }\n    /**\n     * See\n     * [Array.filter](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter)\n     */\n    filter(fn) {\n        return this._results.filter(fn);\n    }\n    /**\n     * See\n     * [Array.find](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/find)\n     */\n    find(fn) {\n        return this._results.find(fn);\n    }\n    /**\n     * See\n     * [Array.reduce](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/reduce)\n     */\n    reduce(fn, init) {\n        return this._results.reduce(fn, init);\n    }\n    /**\n     * See\n     * [Array.forEach](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach)\n     */\n    forEach(fn) {\n        this._results.forEach(fn);\n    }\n    /**\n     * See\n     * [Array.some](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/some)\n     */\n    some(fn) {\n        return this._results.some(fn);\n    }\n    /**\n     * Returns a copy of the internal results list as an Array.\n     */\n    toArray() {\n        return this._results.slice();\n    }\n    toString() {\n        return this._results.toString();\n    }\n    /**\n     * Updates the stored data of the query list, and resets the `dirty` flag to `false`, so that\n     * on change detection, it will not notify of changes to the queries, unless a new change\n     * occurs.\n     *\n     * @param resultsTree The query results to store\n     */\n    reset(resultsTree) {\n        this._results = flatten(resultsTree);\n        this.dirty = false;\n        this.length = this._results.length;\n        this.last = this._results[this.length - 1];\n        this.first = this._results[0];\n    }\n    /**\n     * Triggers a change event by emitting on the `changes` {@link EventEmitter}.\n     */\n    notifyOnChanges() {\n        this.changes.emit(this);\n    }\n    /** internal */\n    setDirty() {\n        this.dirty = true;\n    }\n    /** internal */\n    destroy() {\n        this.changes.complete();\n        this.changes.unsubscribe();\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// Note: This hack is necessary so we don't erroneously get a circular dependency\n// failure based on types.\nconst unusedValueExportToPlacateAjd$7 = 1;\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// Note: This hack is necessary so we don't erroneously get a circular dependency\n// failure based on types.\nconst unusedValueExportToPlacateAjd$8 = 1;\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst unusedValueToPlacateAjd$2 = unusedValueExportToPlacateAjd$7 + unusedValueExportToPlacateAjd$3 + unusedValueExportToPlacateAjd$4 + unusedValueExportToPlacateAjd$8;\nclass LQuery_ {\n    constructor(queryList) {\n        this.queryList = queryList;\n        this.matches = null;\n    }\n    clone() {\n        return new LQuery_(this.queryList);\n    }\n    setDirty() {\n        this.queryList.setDirty();\n    }\n}\nclass LQueries_ {\n    constructor(queries = []) {\n        this.queries = queries;\n    }\n    createEmbeddedView(tView) {\n        const tQueries = tView.queries;\n        if (tQueries !== null) {\n            const noOfInheritedQueries = tView.contentQueries !== null ? tView.contentQueries[0] : tQueries.length;\n            const viewLQueries = [];\n            // An embedded view has queries propagated from a declaration view at the beginning of the\n            // TQueries collection and up until a first content query declared in the embedded view. Only\n            // propagated LQueries are created at this point (LQuery corresponding to declared content\n            // queries will be instantiated from the content query instructions for each directive).\n            for (let i = 0; i < noOfInheritedQueries; i++) {\n                const tQuery = tQueries.getByIndex(i);\n                const parentLQuery = this.queries[tQuery.indexInDeclarationView];\n                viewLQueries.push(parentLQuery.clone());\n            }\n            return new LQueries_(viewLQueries);\n        }\n        return null;\n    }\n    insertView(tView) {\n        this.dirtyQueriesWithMatches(tView);\n    }\n    detachView(tView) {\n        this.dirtyQueriesWithMatches(tView);\n    }\n    dirtyQueriesWithMatches(tView) {\n        for (let i = 0; i < this.queries.length; i++) {\n            if (getTQuery(tView, i).matches !== null) {\n                this.queries[i].setDirty();\n            }\n        }\n    }\n}\nclass TQueryMetadata_ {\n    constructor(predicate, descendants, isStatic, read = null) {\n        this.predicate = predicate;\n        this.descendants = descendants;\n        this.isStatic = isStatic;\n        this.read = read;\n    }\n}\nclass TQueries_ {\n    constructor(queries = []) {\n        this.queries = queries;\n    }\n    elementStart(tView, tNode) {\n        ngDevMode &&\n            assertFirstCreatePass(tView, 'Queries should collect results on the first template pass only');\n        for (let i = 0; i < this.queries.length; i++) {\n            this.queries[i].elementStart(tView, tNode);\n        }\n    }\n    elementEnd(tNode) {\n        for (let i = 0; i < this.queries.length; i++) {\n            this.queries[i].elementEnd(tNode);\n        }\n    }\n    embeddedTView(tNode) {\n        let queriesForTemplateRef = null;\n        for (let i = 0; i < this.length; i++) {\n            const childQueryIndex = queriesForTemplateRef !== null ? queriesForTemplateRef.length : 0;\n            const tqueryClone = this.getByIndex(i).embeddedTView(tNode, childQueryIndex);\n            if (tqueryClone) {\n                tqueryClone.indexInDeclarationView = i;\n                if (queriesForTemplateRef !== null) {\n                    queriesForTemplateRef.push(tqueryClone);\n                }\n                else {\n                    queriesForTemplateRef = [tqueryClone];\n                }\n            }\n        }\n        return queriesForTemplateRef !== null ? new TQueries_(queriesForTemplateRef) : null;\n    }\n    template(tView, tNode) {\n        ngDevMode &&\n            assertFirstCreatePass(tView, 'Queries should collect results on the first template pass only');\n        for (let i = 0; i < this.queries.length; i++) {\n            this.queries[i].template(tView, tNode);\n        }\n    }\n    getByIndex(index) {\n        ngDevMode && assertIndexInRange(this.queries, index);\n        return this.queries[index];\n    }\n    get length() {\n        return this.queries.length;\n    }\n    track(tquery) {\n        this.queries.push(tquery);\n    }\n}\nclass TQuery_ {\n    constructor(metadata, nodeIndex = -1) {\n        this.metadata = metadata;\n        this.matches = null;\n        this.indexInDeclarationView = -1;\n        this.crossesNgTemplate = false;\n        /**\n         * A flag indicating if a given query still applies to nodes it is crossing. We use this flag\n         * (alongside with _declarationNodeIndex) to know when to stop applying content queries to\n         * elements in a template.\n         */\n        this._appliesToNextNode = true;\n        this._declarationNodeIndex = nodeIndex;\n    }\n    elementStart(tView, tNode) {\n        if (this.isApplyingToNode(tNode)) {\n            this.matchTNode(tView, tNode);\n        }\n    }\n    elementEnd(tNode) {\n        if (this._declarationNodeIndex === tNode.index) {\n            this._appliesToNextNode = false;\n        }\n    }\n    template(tView, tNode) {\n        this.elementStart(tView, tNode);\n    }\n    embeddedTView(tNode, childQueryIndex) {\n        if (this.isApplyingToNode(tNode)) {\n            this.crossesNgTemplate = true;\n            // A marker indicating a `<ng-template>` element (a placeholder for query results from\n            // embedded views created based on this `<ng-template>`).\n            this.addMatch(-tNode.index, childQueryIndex);\n            return new TQuery_(this.metadata);\n        }\n        return null;\n    }\n    isApplyingToNode(tNode) {\n        if (this._appliesToNextNode && this.metadata.descendants === false) {\n            const declarationNodeIdx = this._declarationNodeIndex;\n            let parent = tNode.parent;\n            // Determine if a given TNode is a \"direct\" child of a node on which a content query was\n            // declared (only direct children of query's host node can match with the descendants: false\n            // option). There are 3 main use-case / conditions to consider here:\n            // - <needs-target><i #target></i></needs-target>: here <i #target> parent node is a query\n            // host node;\n            // - <needs-target><ng-template [ngIf]=\"true\"><i #target></i></ng-template></needs-target>:\n            // here <i #target> parent node is null;\n            // - <needs-target><ng-container><i #target></i></ng-container></needs-target>: here we need\n            // to go past `<ng-container>` to determine <i #target> parent node (but we shouldn't traverse\n            // up past the query's host node!).\n            while (parent !== null && parent.type === 4 /* ElementContainer */ &&\n                parent.index !== declarationNodeIdx) {\n                parent = parent.parent;\n            }\n            return declarationNodeIdx === (parent !== null ? parent.index : -1);\n        }\n        return this._appliesToNextNode;\n    }\n    matchTNode(tView, tNode) {\n        const predicate = this.metadata.predicate;\n        if (Array.isArray(predicate)) {\n            for (let i = 0; i < predicate.length; i++) {\n                const name = predicate[i];\n                this.matchTNodeWithReadOption(tView, tNode, getIdxOfMatchingSelector(tNode, name));\n                // Also try matching the name to a provider since strings can be used as DI tokens too.\n                this.matchTNodeWithReadOption(tView, tNode, locateDirectiveOrProvider(tNode, tView, name, false, false));\n            }\n        }\n        else {\n            if (predicate === TemplateRef) {\n                if (tNode.type === 0 /* Container */) {\n                    this.matchTNodeWithReadOption(tView, tNode, -1);\n                }\n            }\n            else {\n                this.matchTNodeWithReadOption(tView, tNode, locateDirectiveOrProvider(tNode, tView, predicate, false, false));\n            }\n        }\n    }\n    matchTNodeWithReadOption(tView, tNode, nodeMatchIdx) {\n        if (nodeMatchIdx !== null) {\n            const read = this.metadata.read;\n            if (read !== null) {\n                if (read === ElementRef || read === ViewContainerRef ||\n                    read === TemplateRef && tNode.type === 0 /* Container */) {\n                    this.addMatch(tNode.index, -2);\n                }\n                else {\n                    const directiveOrProviderIdx = locateDirectiveOrProvider(tNode, tView, read, false, false);\n                    if (directiveOrProviderIdx !== null) {\n                        this.addMatch(tNode.index, directiveOrProviderIdx);\n                    }\n                }\n            }\n            else {\n                this.addMatch(tNode.index, nodeMatchIdx);\n            }\n        }\n    }\n    addMatch(tNodeIdx, matchIdx) {\n        if (this.matches === null) {\n            this.matches = [tNodeIdx, matchIdx];\n        }\n        else {\n            this.matches.push(tNodeIdx, matchIdx);\n        }\n    }\n}\n/**\n * Iterates over local names for a given node and returns directive index\n * (or -1 if a local name points to an element).\n *\n * @param tNode static data of a node to check\n * @param selector selector to match\n * @returns directive index, -1 or null if a selector didn't match any of the local names\n */\nfunction getIdxOfMatchingSelector(tNode, selector) {\n    const localNames = tNode.localNames;\n    if (localNames !== null) {\n        for (let i = 0; i < localNames.length; i += 2) {\n            if (localNames[i] === selector) {\n                return localNames[i + 1];\n            }\n        }\n    }\n    return null;\n}\nfunction createResultByTNodeType(tNode, currentView) {\n    if (tNode.type === 3 /* Element */ || tNode.type === 4 /* ElementContainer */) {\n        return createElementRef(ElementRef, tNode, currentView);\n    }\n    else if (tNode.type === 0 /* Container */) {\n        return createTemplateRef(TemplateRef, ElementRef, tNode, currentView);\n    }\n    return null;\n}\nfunction createResultForNode(lView, tNode, matchingIdx, read) {\n    if (matchingIdx === -1) {\n        // if read token and / or strategy is not specified, detect it using appropriate tNode type\n        return createResultByTNodeType(tNode, lView);\n    }\n    else if (matchingIdx === -2) {\n        // read a special token from a node injector\n        return createSpecialToken(lView, tNode, read);\n    }\n    else {\n        // read a token\n        return getNodeInjectable(lView, lView[TVIEW], matchingIdx, tNode);\n    }\n}\nfunction createSpecialToken(lView, tNode, read) {\n    if (read === ElementRef) {\n        return createElementRef(ElementRef, tNode, lView);\n    }\n    else if (read === TemplateRef) {\n        return createTemplateRef(TemplateRef, ElementRef, tNode, lView);\n    }\n    else if (read === ViewContainerRef) {\n        ngDevMode &&\n            assertNodeOfPossibleTypes(tNode, [3 /* Element */, 0 /* Container */, 4 /* ElementContainer */]);\n        return createContainerRef(ViewContainerRef, ElementRef, tNode, lView);\n    }\n    else {\n        ngDevMode &&\n            throwError(`Special token to read should be one of ElementRef, TemplateRef or ViewContainerRef but got ${stringify(read)}.`);\n    }\n}\n/**\n * A helper function that creates query results for a given view. This function is meant to do the\n * processing once and only once for a given view instance (a set of results for a given view\n * doesn't change).\n */\nfunction materializeViewResults(tView, lView, tQuery, queryIndex) {\n    const lQuery = lView[QUERIES].queries[queryIndex];\n    if (lQuery.matches === null) {\n        const tViewData = tView.data;\n        const tQueryMatches = tQuery.matches;\n        const result = [];\n        for (let i = 0; i < tQueryMatches.length; i += 2) {\n            const matchedNodeIdx = tQueryMatches[i];\n            if (matchedNodeIdx < 0) {\n                // we at the <ng-template> marker which might have results in views created based on this\n                // <ng-template> - those results will be in separate views though, so here we just leave\n                // null as a placeholder\n                result.push(null);\n            }\n            else {\n                ngDevMode && assertIndexInRange(tViewData, matchedNodeIdx);\n                const tNode = tViewData[matchedNodeIdx];\n                result.push(createResultForNode(lView, tNode, tQueryMatches[i + 1], tQuery.metadata.read));\n            }\n        }\n        lQuery.matches = result;\n    }\n    return lQuery.matches;\n}\n/**\n * A helper function that collects (already materialized) query results from a tree of views,\n * starting with a provided LView.\n */\nfunction collectQueryResults(tView, lView, queryIndex, result) {\n    const tQuery = tView.queries.getByIndex(queryIndex);\n    const tQueryMatches = tQuery.matches;\n    if (tQueryMatches !== null) {\n        const lViewResults = materializeViewResults(tView, lView, tQuery, queryIndex);\n        for (let i = 0; i < tQueryMatches.length; i += 2) {\n            const tNodeIdx = tQueryMatches[i];\n            if (tNodeIdx > 0) {\n                result.push(lViewResults[i / 2]);\n            }\n            else {\n                const childQueryIndex = tQueryMatches[i + 1];\n                const declarationLContainer = lView[-tNodeIdx];\n                ngDevMode && assertLContainer(declarationLContainer);\n                // collect matches for views inserted in this container\n                for (let i = CONTAINER_HEADER_OFFSET; i < declarationLContainer.length; i++) {\n                    const embeddedLView = declarationLContainer[i];\n                    if (embeddedLView[DECLARATION_LCONTAINER] === embeddedLView[PARENT]) {\n                        collectQueryResults(embeddedLView[TVIEW], embeddedLView, childQueryIndex, result);\n                    }\n                }\n                // collect matches for views created from this declaration container and inserted into\n                // different containers\n                if (declarationLContainer[MOVED_VIEWS] !== null) {\n                    const embeddedLViews = declarationLContainer[MOVED_VIEWS];\n                    for (let i = 0; i < embeddedLViews.length; i++) {\n                        const embeddedLView = embeddedLViews[i];\n                        collectQueryResults(embeddedLView[TVIEW], embeddedLView, childQueryIndex, result);\n                    }\n                }\n            }\n        }\n    }\n    return result;\n}\n/**\n * Refreshes a query by combining matches from all active views and removing matches from deleted\n * views.\n *\n * @returns `true` if a query got dirty during change detection or if this is a static query\n * resolving in creation mode, `false` otherwise.\n *\n * @codeGenApi\n */\nfunction ɵɵqueryRefresh(queryList) {\n    const lView = getLView();\n    const tView = getTView();\n    const queryIndex = getCurrentQueryIndex();\n    setCurrentQueryIndex(queryIndex + 1);\n    const tQuery = getTQuery(tView, queryIndex);\n    if (queryList.dirty && (isCreationMode(lView) === tQuery.metadata.isStatic)) {\n        if (tQuery.matches === null) {\n            queryList.reset([]);\n        }\n        else {\n            const result = tQuery.crossesNgTemplate ?\n                collectQueryResults(tView, lView, queryIndex, []) :\n                materializeViewResults(tView, lView, tQuery, queryIndex);\n            queryList.reset(result);\n            queryList.notifyOnChanges();\n        }\n        return true;\n    }\n    return false;\n}\n/**\n * Creates new QueryList for a static view query.\n *\n * @param predicate The type for which the query will search\n * @param descend Whether or not to descend into children\n * @param read What to save in the query\n *\n * @codeGenApi\n */\nfunction ɵɵstaticViewQuery(predicate, descend, read) {\n    viewQueryInternal(getTView(), getLView(), predicate, descend, read, true);\n}\n/**\n * Creates new QueryList, stores the reference in LView and returns QueryList.\n *\n * @param predicate The type for which the query will search\n * @param descend Whether or not to descend into children\n * @param read What to save in the query\n *\n * @codeGenApi\n */\nfunction ɵɵviewQuery(predicate, descend, read) {\n    viewQueryInternal(getTView(), getLView(), predicate, descend, read, false);\n}\nfunction viewQueryInternal(tView, lView, predicate, descend, read, isStatic) {\n    if (tView.firstCreatePass) {\n        createTQuery(tView, new TQueryMetadata_(predicate, descend, isStatic, read), -1);\n        if (isStatic) {\n            tView.staticViewQueries = true;\n        }\n    }\n    createLQuery(tView, lView);\n}\n/**\n * Registers a QueryList, associated with a content query, for later refresh (part of a view\n * refresh).\n *\n * @param directiveIndex Current directive index\n * @param predicate The type for which the query will search\n * @param descend Whether or not to descend into children\n * @param read What to save in the query\n * @returns QueryList<T>\n *\n * @codeGenApi\n */\nfunction ɵɵcontentQuery(directiveIndex, predicate, descend, read) {\n    contentQueryInternal(getTView(), getLView(), predicate, descend, read, false, getPreviousOrParentTNode(), directiveIndex);\n}\n/**\n * Registers a QueryList, associated with a static content query, for later refresh\n * (part of a view refresh).\n *\n * @param directiveIndex Current directive index\n * @param predicate The type for which the query will search\n * @param descend Whether or not to descend into children\n * @param read What to save in the query\n * @returns QueryList<T>\n *\n * @codeGenApi\n */\nfunction ɵɵstaticContentQuery(directiveIndex, predicate, descend, read) {\n    contentQueryInternal(getTView(), getLView(), predicate, descend, read, true, getPreviousOrParentTNode(), directiveIndex);\n}\nfunction contentQueryInternal(tView, lView, predicate, descend, read, isStatic, tNode, directiveIndex) {\n    if (tView.firstCreatePass) {\n        createTQuery(tView, new TQueryMetadata_(predicate, descend, isStatic, read), tNode.index);\n        saveContentQueryAndDirectiveIndex(tView, directiveIndex);\n        if (isStatic) {\n            tView.staticContentQueries = true;\n        }\n    }\n    createLQuery(tView, lView);\n}\n/**\n * Loads a QueryList corresponding to the current view or content query.\n *\n * @codeGenApi\n */\nfunction ɵɵloadQuery() {\n    return loadQueryInternal(getLView(), getCurrentQueryIndex());\n}\nfunction loadQueryInternal(lView, queryIndex) {\n    ngDevMode &&\n        assertDefined(lView[QUERIES], 'LQueries should be defined when trying to load a query');\n    ngDevMode && assertIndexInRange(lView[QUERIES].queries, queryIndex);\n    return lView[QUERIES].queries[queryIndex].queryList;\n}\nfunction createLQuery(tView, lView) {\n    const queryList = new QueryList();\n    storeCleanupWithContext(tView, lView, queryList, queryList.destroy);\n    if (lView[QUERIES] === null)\n        lView[QUERIES] = new LQueries_();\n    lView[QUERIES].queries.push(new LQuery_(queryList));\n}\nfunction createTQuery(tView, metadata, nodeIndex) {\n    if (tView.queries === null)\n        tView.queries = new TQueries_();\n    tView.queries.track(new TQuery_(metadata, nodeIndex));\n}\nfunction saveContentQueryAndDirectiveIndex(tView, directiveIndex) {\n    const tViewContentQueries = tView.contentQueries || (tView.contentQueries = []);\n    const lastSavedDirectiveIndex = tView.contentQueries.length ? tViewContentQueries[tViewContentQueries.length - 1] : -1;\n    if (directiveIndex !== lastSavedDirectiveIndex) {\n        tViewContentQueries.push(tView.queries.length - 1, directiveIndex);\n    }\n}\nfunction getTQuery(tView, index) {\n    ngDevMode && assertDefined(tView.queries, 'TQueries must be defined to retrieve a TQuery');\n    return tView.queries.getByIndex(index);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Retrieves `TemplateRef` instance from `Injector` when a local reference is placed on the\n * `<ng-template>` element.\n *\n * @codeGenApi\n */\nfunction ɵɵtemplateRefExtractor(tNode, currentView) {\n    return createTemplateRef(TemplateRef, ElementRef, tNode, currentView);\n}\n/**\n * Returns the appropriate `ChangeDetectorRef` for a pipe.\n *\n * @codeGenApi\n */\nfunction ɵɵinjectPipeChangeDetectorRef(flags = InjectFlags.Default) {\n    const value = injectChangeDetectorRef(true);\n    if (value == null && !(flags & InjectFlags.Optional)) {\n        throw new Error(`No provider for ChangeDetectorRef!`);\n    }\n    else {\n        return value;\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst ɵ0$d = () => ({\n    'ɵɵattribute': ɵɵattribute,\n    'ɵɵattributeInterpolate1': ɵɵattributeInterpolate1,\n    'ɵɵattributeInterpolate2': ɵɵattributeInterpolate2,\n    'ɵɵattributeInterpolate3': ɵɵattributeInterpolate3,\n    'ɵɵattributeInterpolate4': ɵɵattributeInterpolate4,\n    'ɵɵattributeInterpolate5': ɵɵattributeInterpolate5,\n    'ɵɵattributeInterpolate6': ɵɵattributeInterpolate6,\n    'ɵɵattributeInterpolate7': ɵɵattributeInterpolate7,\n    'ɵɵattributeInterpolate8': ɵɵattributeInterpolate8,\n    'ɵɵattributeInterpolateV': ɵɵattributeInterpolateV,\n    'ɵɵdefineComponent': ɵɵdefineComponent,\n    'ɵɵdefineDirective': ɵɵdefineDirective,\n    'ɵɵdefineInjectable': ɵɵdefineInjectable,\n    'ɵɵdefineInjector': ɵɵdefineInjector,\n    'ɵɵdefineNgModule': ɵɵdefineNgModule,\n    'ɵɵdefinePipe': ɵɵdefinePipe,\n    'ɵɵdirectiveInject': ɵɵdirectiveInject,\n    'ɵɵgetFactoryOf': ɵɵgetFactoryOf,\n    'ɵɵgetInheritedFactory': ɵɵgetInheritedFactory,\n    'ɵɵinject': ɵɵinject,\n    'ɵɵinjectAttribute': ɵɵinjectAttribute,\n    'ɵɵinvalidFactory': ɵɵinvalidFactory,\n    'ɵɵinvalidFactoryDep': ɵɵinvalidFactoryDep,\n    'ɵɵinjectPipeChangeDetectorRef': ɵɵinjectPipeChangeDetectorRef,\n    'ɵɵtemplateRefExtractor': ɵɵtemplateRefExtractor,\n    'ɵɵNgOnChangesFeature': ɵɵNgOnChangesFeature,\n    'ɵɵProvidersFeature': ɵɵProvidersFeature,\n    'ɵɵCopyDefinitionFeature': ɵɵCopyDefinitionFeature,\n    'ɵɵInheritDefinitionFeature': ɵɵInheritDefinitionFeature,\n    'ɵɵnextContext': ɵɵnextContext,\n    'ɵɵnamespaceHTML': ɵɵnamespaceHTML,\n    'ɵɵnamespaceMathML': ɵɵnamespaceMathML,\n    'ɵɵnamespaceSVG': ɵɵnamespaceSVG,\n    'ɵɵenableBindings': ɵɵenableBindings,\n    'ɵɵdisableBindings': ɵɵdisableBindings,\n    'ɵɵelementStart': ɵɵelementStart,\n    'ɵɵelementEnd': ɵɵelementEnd,\n    'ɵɵelement': ɵɵelement,\n    'ɵɵelementContainerStart': ɵɵelementContainerStart,\n    'ɵɵelementContainerEnd': ɵɵelementContainerEnd,\n    'ɵɵelementContainer': ɵɵelementContainer,\n    'ɵɵpureFunction0': ɵɵpureFunction0,\n    'ɵɵpureFunction1': ɵɵpureFunction1,\n    'ɵɵpureFunction2': ɵɵpureFunction2,\n    'ɵɵpureFunction3': ɵɵpureFunction3,\n    'ɵɵpureFunction4': ɵɵpureFunction4,\n    'ɵɵpureFunction5': ɵɵpureFunction5,\n    'ɵɵpureFunction6': ɵɵpureFunction6,\n    'ɵɵpureFunction7': ɵɵpureFunction7,\n    'ɵɵpureFunction8': ɵɵpureFunction8,\n    'ɵɵpureFunctionV': ɵɵpureFunctionV,\n    'ɵɵgetCurrentView': ɵɵgetCurrentView,\n    'ɵɵrestoreView': ɵɵrestoreView,\n    'ɵɵlistener': ɵɵlistener,\n    'ɵɵprojection': ɵɵprojection,\n    'ɵɵsyntheticHostProperty': ɵɵsyntheticHostProperty,\n    'ɵɵsyntheticHostListener': ɵɵsyntheticHostListener,\n    'ɵɵpipeBind1': ɵɵpipeBind1,\n    'ɵɵpipeBind2': ɵɵpipeBind2,\n    'ɵɵpipeBind3': ɵɵpipeBind3,\n    'ɵɵpipeBind4': ɵɵpipeBind4,\n    'ɵɵpipeBindV': ɵɵpipeBindV,\n    'ɵɵprojectionDef': ɵɵprojectionDef,\n    'ɵɵhostProperty': ɵɵhostProperty,\n    'ɵɵproperty': ɵɵproperty,\n    'ɵɵpropertyInterpolate': ɵɵpropertyInterpolate,\n    'ɵɵpropertyInterpolate1': ɵɵpropertyInterpolate1,\n    'ɵɵpropertyInterpolate2': ɵɵpropertyInterpolate2,\n    'ɵɵpropertyInterpolate3': ɵɵpropertyInterpolate3,\n    'ɵɵpropertyInterpolate4': ɵɵpropertyInterpolate4,\n    'ɵɵpropertyInterpolate5': ɵɵpropertyInterpolate5,\n    'ɵɵpropertyInterpolate6': ɵɵpropertyInterpolate6,\n    'ɵɵpropertyInterpolate7': ɵɵpropertyInterpolate7,\n    'ɵɵpropertyInterpolate8': ɵɵpropertyInterpolate8,\n    'ɵɵpropertyInterpolateV': ɵɵpropertyInterpolateV,\n    'ɵɵpipe': ɵɵpipe,\n    'ɵɵqueryRefresh': ɵɵqueryRefresh,\n    'ɵɵviewQuery': ɵɵviewQuery,\n    'ɵɵstaticViewQuery': ɵɵstaticViewQuery,\n    'ɵɵstaticContentQuery': ɵɵstaticContentQuery,\n    'ɵɵloadQuery': ɵɵloadQuery,\n    'ɵɵcontentQuery': ɵɵcontentQuery,\n    'ɵɵreference': ɵɵreference,\n    'ɵɵclassMap': ɵɵclassMap,\n    'ɵɵclassMapInterpolate1': ɵɵclassMapInterpolate1,\n    'ɵɵclassMapInterpolate2': ɵɵclassMapInterpolate2,\n    'ɵɵclassMapInterpolate3': ɵɵclassMapInterpolate3,\n    'ɵɵclassMapInterpolate4': ɵɵclassMapInterpolate4,\n    'ɵɵclassMapInterpolate5': ɵɵclassMapInterpolate5,\n    'ɵɵclassMapInterpolate6': ɵɵclassMapInterpolate6,\n    'ɵɵclassMapInterpolate7': ɵɵclassMapInterpolate7,\n    'ɵɵclassMapInterpolate8': ɵɵclassMapInterpolate8,\n    'ɵɵclassMapInterpolateV': ɵɵclassMapInterpolateV,\n    'ɵɵstyleMap': ɵɵstyleMap,\n    'ɵɵstyleMapInterpolate1': ɵɵstyleMapInterpolate1,\n    'ɵɵstyleMapInterpolate2': ɵɵstyleMapInterpolate2,\n    'ɵɵstyleMapInterpolate3': ɵɵstyleMapInterpolate3,\n    'ɵɵstyleMapInterpolate4': ɵɵstyleMapInterpolate4,\n    'ɵɵstyleMapInterpolate5': ɵɵstyleMapInterpolate5,\n    'ɵɵstyleMapInterpolate6': ɵɵstyleMapInterpolate6,\n    'ɵɵstyleMapInterpolate7': ɵɵstyleMapInterpolate7,\n    'ɵɵstyleMapInterpolate8': ɵɵstyleMapInterpolate8,\n    'ɵɵstyleMapInterpolateV': ɵɵstyleMapInterpolateV,\n    'ɵɵstyleProp': ɵɵstyleProp,\n    'ɵɵstylePropInterpolate1': ɵɵstylePropInterpolate1,\n    'ɵɵstylePropInterpolate2': ɵɵstylePropInterpolate2,\n    'ɵɵstylePropInterpolate3': ɵɵstylePropInterpolate3,\n    'ɵɵstylePropInterpolate4': ɵɵstylePropInterpolate4,\n    'ɵɵstylePropInterpolate5': ɵɵstylePropInterpolate5,\n    'ɵɵstylePropInterpolate6': ɵɵstylePropInterpolate6,\n    'ɵɵstylePropInterpolate7': ɵɵstylePropInterpolate7,\n    'ɵɵstylePropInterpolate8': ɵɵstylePropInterpolate8,\n    'ɵɵstylePropInterpolateV': ɵɵstylePropInterpolateV,\n    'ɵɵclassProp': ɵɵclassProp,\n    'ɵɵadvance': ɵɵadvance,\n    'ɵɵtemplate': ɵɵtemplate,\n    'ɵɵtext': ɵɵtext,\n    'ɵɵtextInterpolate': ɵɵtextInterpolate,\n    'ɵɵtextInterpolate1': ɵɵtextInterpolate1,\n    'ɵɵtextInterpolate2': ɵɵtextInterpolate2,\n    'ɵɵtextInterpolate3': ɵɵtextInterpolate3,\n    'ɵɵtextInterpolate4': ɵɵtextInterpolate4,\n    'ɵɵtextInterpolate5': ɵɵtextInterpolate5,\n    'ɵɵtextInterpolate6': ɵɵtextInterpolate6,\n    'ɵɵtextInterpolate7': ɵɵtextInterpolate7,\n    'ɵɵtextInterpolate8': ɵɵtextInterpolate8,\n    'ɵɵtextInterpolateV': ɵɵtextInterpolateV,\n    'ɵɵi18n': ɵɵi18n,\n    'ɵɵi18nAttributes': ɵɵi18nAttributes,\n    'ɵɵi18nExp': ɵɵi18nExp,\n    'ɵɵi18nStart': ɵɵi18nStart,\n    'ɵɵi18nEnd': ɵɵi18nEnd,\n    'ɵɵi18nApply': ɵɵi18nApply,\n    'ɵɵi18nPostprocess': ɵɵi18nPostprocess,\n    'ɵɵresolveWindow': ɵɵresolveWindow,\n    'ɵɵresolveDocument': ɵɵresolveDocument,\n    'ɵɵresolveBody': ɵɵresolveBody,\n    'ɵɵsetComponentScope': ɵɵsetComponentScope,\n    'ɵɵsetNgModuleScope': ɵɵsetNgModuleScope,\n    'ɵɵsanitizeHtml': ɵɵsanitizeHtml,\n    'ɵɵsanitizeStyle': ɵɵsanitizeStyle,\n    'ɵɵsanitizeResourceUrl': ɵɵsanitizeResourceUrl,\n    'ɵɵsanitizeScript': ɵɵsanitizeScript,\n    'ɵɵsanitizeUrl': ɵɵsanitizeUrl,\n    'ɵɵsanitizeUrlOrResourceUrl': ɵɵsanitizeUrlOrResourceUrl,\n});\n/**\n * A mapping of the @angular/core API surface used in generated expressions to the actual symbols.\n *\n * This should be kept up to date with the public exports of @angular/core.\n */\nconst angularCoreEnv = (ɵ0$d)();\n\nlet jitOptions = null;\nfunction setJitOptions(options) {\n    if (jitOptions !== null) {\n        if (options.defaultEncapsulation !== jitOptions.defaultEncapsulation) {\n            ngDevMode &&\n                console.error('Provided value for `defaultEncapsulation` can not be changed once it has been set.');\n            return;\n        }\n        if (options.preserveWhitespaces !== jitOptions.preserveWhitespaces) {\n            ngDevMode &&\n                console.error('Provided value for `preserveWhitespaces` can not be changed once it has been set.');\n            return;\n        }\n    }\n    jitOptions = options;\n}\nfunction getJitOptions() {\n    return jitOptions;\n}\nfunction resetJitOptions() {\n    jitOptions = null;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst EMPTY_ARRAY$5 = [];\nconst moduleQueue = [];\n/**\n * Enqueues moduleDef to be checked later to see if scope can be set on its\n * component declarations.\n */\nfunction enqueueModuleForDelayedScoping(moduleType, ngModule) {\n    moduleQueue.push({ moduleType, ngModule });\n}\nlet flushingModuleQueue = false;\n/**\n * Loops over queued module definitions, if a given module definition has all of its\n * declarations resolved, it dequeues that module definition and sets the scope on\n * its declarations.\n */\nfunction flushModuleScopingQueueAsMuchAsPossible() {\n    if (!flushingModuleQueue) {\n        flushingModuleQueue = true;\n        try {\n            for (let i = moduleQueue.length - 1; i >= 0; i--) {\n                const { moduleType, ngModule } = moduleQueue[i];\n                if (ngModule.declarations && ngModule.declarations.every(isResolvedDeclaration)) {\n                    // dequeue\n                    moduleQueue.splice(i, 1);\n                    setScopeOnDeclaredComponents(moduleType, ngModule);\n                }\n            }\n        }\n        finally {\n            flushingModuleQueue = false;\n        }\n    }\n}\n/**\n * Returns truthy if a declaration has resolved. If the declaration happens to be\n * an array of declarations, it will recurse to check each declaration in that array\n * (which may also be arrays).\n */\nfunction isResolvedDeclaration(declaration) {\n    if (Array.isArray(declaration)) {\n        return declaration.every(isResolvedDeclaration);\n    }\n    return !!resolveForwardRef(declaration);\n}\n/**\n * Compiles a module in JIT mode.\n *\n * This function automatically gets called when a class has a `@NgModule` decorator.\n */\nfunction compileNgModule(moduleType, ngModule = {}) {\n    compileNgModuleDefs(moduleType, ngModule);\n    // Because we don't know if all declarations have resolved yet at the moment the\n    // NgModule decorator is executing, we're enqueueing the setting of module scope\n    // on its declarations to be run at a later time when all declarations for the module,\n    // including forward refs, have resolved.\n    enqueueModuleForDelayedScoping(moduleType, ngModule);\n}\n/**\n * Compiles and adds the `ɵmod` and `ɵinj` properties to the module class.\n *\n * It's possible to compile a module via this API which will allow duplicate declarations in its\n * root.\n */\nfunction compileNgModuleDefs(moduleType, ngModule, allowDuplicateDeclarationsInRoot = false) {\n    ngDevMode && assertDefined(moduleType, 'Required value moduleType');\n    ngDevMode && assertDefined(ngModule, 'Required value ngModule');\n    const declarations = flatten(ngModule.declarations || EMPTY_ARRAY$5);\n    let ngModuleDef = null;\n    Object.defineProperty(moduleType, NG_MOD_DEF, {\n        configurable: true,\n        get: () => {\n            if (ngModuleDef === null) {\n                if (ngDevMode && ngModule.imports && ngModule.imports.indexOf(moduleType) > -1) {\n                    // We need to assert this immediately, because allowing it to continue will cause it to\n                    // go into an infinite loop before we've reached the point where we throw all the errors.\n                    throw new Error(`'${stringifyForError(moduleType)}' module can't import itself`);\n                }\n                ngModuleDef = getCompilerFacade().compileNgModule(angularCoreEnv, `ng:///${moduleType.name}/ɵmod.js`, {\n                    type: moduleType,\n                    bootstrap: flatten(ngModule.bootstrap || EMPTY_ARRAY$5).map(resolveForwardRef),\n                    declarations: declarations.map(resolveForwardRef),\n                    imports: flatten(ngModule.imports || EMPTY_ARRAY$5)\n                        .map(resolveForwardRef)\n                        .map(expandModuleWithProviders),\n                    exports: flatten(ngModule.exports || EMPTY_ARRAY$5)\n                        .map(resolveForwardRef)\n                        .map(expandModuleWithProviders),\n                    schemas: ngModule.schemas ? flatten(ngModule.schemas) : null,\n                    id: ngModule.id || null,\n                });\n                // Set `schemas` on ngModuleDef to an empty array in JIT mode to indicate that runtime\n                // should verify that there are no unknown elements in a template. In AOT mode, that check\n                // happens at compile time and `schemas` information is not present on Component and Module\n                // defs after compilation (so the check doesn't happen the second time at runtime).\n                if (!ngModuleDef.schemas) {\n                    ngModuleDef.schemas = [];\n                }\n            }\n            return ngModuleDef;\n        }\n    });\n    let ngInjectorDef = null;\n    Object.defineProperty(moduleType, NG_INJ_DEF, {\n        get: () => {\n            if (ngInjectorDef === null) {\n                ngDevMode &&\n                    verifySemanticsOfNgModuleDef(moduleType, allowDuplicateDeclarationsInRoot);\n                const meta = {\n                    name: moduleType.name,\n                    type: moduleType,\n                    deps: reflectDependencies(moduleType),\n                    providers: ngModule.providers || EMPTY_ARRAY$5,\n                    imports: [\n                        (ngModule.imports || EMPTY_ARRAY$5).map(resolveForwardRef),\n                        (ngModule.exports || EMPTY_ARRAY$5).map(resolveForwardRef),\n                    ],\n                };\n                ngInjectorDef = getCompilerFacade().compileInjector(angularCoreEnv, `ng:///${moduleType.name}/ɵinj.js`, meta);\n            }\n            return ngInjectorDef;\n        },\n        // Make the property configurable in dev mode to allow overriding in tests\n        configurable: !!ngDevMode,\n    });\n}\nfunction verifySemanticsOfNgModuleDef(moduleType, allowDuplicateDeclarationsInRoot, importingModule) {\n    if (verifiedNgModule.get(moduleType))\n        return;\n    verifiedNgModule.set(moduleType, true);\n    moduleType = resolveForwardRef(moduleType);\n    let ngModuleDef;\n    if (importingModule) {\n        ngModuleDef = getNgModuleDef(moduleType);\n        if (!ngModuleDef) {\n            throw new Error(`Unexpected value '${moduleType.name}' imported by the module '${importingModule.name}'. Please add an @NgModule annotation.`);\n        }\n    }\n    else {\n        ngModuleDef = getNgModuleDef(moduleType, true);\n    }\n    const errors = [];\n    const declarations = maybeUnwrapFn(ngModuleDef.declarations);\n    const imports = maybeUnwrapFn(ngModuleDef.imports);\n    flatten(imports).map(unwrapModuleWithProvidersImports).forEach(mod => {\n        verifySemanticsOfNgModuleImport(mod, moduleType);\n        verifySemanticsOfNgModuleDef(mod, false, moduleType);\n    });\n    const exports = maybeUnwrapFn(ngModuleDef.exports);\n    declarations.forEach(verifyDeclarationsHaveDefinitions);\n    declarations.forEach(verifyDirectivesHaveSelector);\n    const combinedDeclarations = [\n        ...declarations.map(resolveForwardRef),\n        ...flatten(imports.map(computeCombinedExports)).map(resolveForwardRef),\n    ];\n    exports.forEach(verifyExportsAreDeclaredOrReExported);\n    declarations.forEach(decl => verifyDeclarationIsUnique(decl, allowDuplicateDeclarationsInRoot));\n    declarations.forEach(verifyComponentEntryComponentsIsPartOfNgModule);\n    const ngModule = getAnnotation(moduleType, 'NgModule');\n    if (ngModule) {\n        ngModule.imports &&\n            flatten(ngModule.imports).map(unwrapModuleWithProvidersImports).forEach(mod => {\n                verifySemanticsOfNgModuleImport(mod, moduleType);\n                verifySemanticsOfNgModuleDef(mod, false, moduleType);\n            });\n        ngModule.bootstrap && deepForEach(ngModule.bootstrap, verifyCorrectBootstrapType);\n        ngModule.bootstrap && deepForEach(ngModule.bootstrap, verifyComponentIsPartOfNgModule);\n        ngModule.entryComponents &&\n            deepForEach(ngModule.entryComponents, verifyComponentIsPartOfNgModule);\n    }\n    // Throw Error if any errors were detected.\n    if (errors.length) {\n        throw new Error(errors.join('\\n'));\n    }\n    ////////////////////////////////////////////////////////////////////////////////////////////////\n    function verifyDeclarationsHaveDefinitions(type) {\n        type = resolveForwardRef(type);\n        const def = getComponentDef(type) || getDirectiveDef(type) || getPipeDef(type);\n        if (!def) {\n            errors.push(`Unexpected value '${stringifyForError(type)}' declared by the module '${stringifyForError(moduleType)}'. Please add a @Pipe/@Directive/@Component annotation.`);\n        }\n    }\n    function verifyDirectivesHaveSelector(type) {\n        type = resolveForwardRef(type);\n        const def = getDirectiveDef(type);\n        if (!getComponentDef(type) && def && def.selectors.length == 0) {\n            errors.push(`Directive ${stringifyForError(type)} has no selector, please add it!`);\n        }\n    }\n    function verifyExportsAreDeclaredOrReExported(type) {\n        type = resolveForwardRef(type);\n        const kind = getComponentDef(type) && 'component' || getDirectiveDef(type) && 'directive' ||\n            getPipeDef(type) && 'pipe';\n        if (kind) {\n            // only checked if we are declared as Component, Directive, or Pipe\n            // Modules don't need to be declared or imported.\n            if (combinedDeclarations.lastIndexOf(type) === -1) {\n                // We are exporting something which we don't explicitly declare or import.\n                errors.push(`Can't export ${kind} ${stringifyForError(type)} from ${stringifyForError(moduleType)} as it was neither declared nor imported!`);\n            }\n        }\n    }\n    function verifyDeclarationIsUnique(type, suppressErrors) {\n        type = resolveForwardRef(type);\n        const existingModule = ownerNgModule.get(type);\n        if (existingModule && existingModule !== moduleType) {\n            if (!suppressErrors) {\n                const modules = [existingModule, moduleType].map(stringifyForError).sort();\n                errors.push(`Type ${stringifyForError(type)} is part of the declarations of 2 modules: ${modules[0]} and ${modules[1]}! ` +\n                    `Please consider moving ${stringifyForError(type)} to a higher module that imports ${modules[0]} and ${modules[1]}. ` +\n                    `You can also create a new NgModule that exports and includes ${stringifyForError(type)} then import that NgModule in ${modules[0]} and ${modules[1]}.`);\n            }\n        }\n        else {\n            // Mark type as having owner.\n            ownerNgModule.set(type, moduleType);\n        }\n    }\n    function verifyComponentIsPartOfNgModule(type) {\n        type = resolveForwardRef(type);\n        const existingModule = ownerNgModule.get(type);\n        if (!existingModule) {\n            errors.push(`Component ${stringifyForError(type)} is not part of any NgModule or the module has not been imported into your module.`);\n        }\n    }\n    function verifyCorrectBootstrapType(type) {\n        type = resolveForwardRef(type);\n        if (!getComponentDef(type)) {\n            errors.push(`${stringifyForError(type)} cannot be used as an entry component.`);\n        }\n    }\n    function verifyComponentEntryComponentsIsPartOfNgModule(type) {\n        type = resolveForwardRef(type);\n        if (getComponentDef(type)) {\n            // We know we are component\n            const component = getAnnotation(type, 'Component');\n            if (component && component.entryComponents) {\n                deepForEach(component.entryComponents, verifyComponentIsPartOfNgModule);\n            }\n        }\n    }\n    function verifySemanticsOfNgModuleImport(type, importingModule) {\n        type = resolveForwardRef(type);\n        if (getComponentDef(type) || getDirectiveDef(type)) {\n            throw new Error(`Unexpected directive '${type.name}' imported by the module '${importingModule.name}'. Please add an @NgModule annotation.`);\n        }\n        if (getPipeDef(type)) {\n            throw new Error(`Unexpected pipe '${type.name}' imported by the module '${importingModule.name}'. Please add an @NgModule annotation.`);\n        }\n    }\n}\nfunction unwrapModuleWithProvidersImports(typeOrWithProviders) {\n    typeOrWithProviders = resolveForwardRef(typeOrWithProviders);\n    return typeOrWithProviders.ngModule || typeOrWithProviders;\n}\nfunction getAnnotation(type, name) {\n    let annotation = null;\n    collect(type.__annotations__);\n    collect(type.decorators);\n    return annotation;\n    function collect(annotations) {\n        if (annotations) {\n            annotations.forEach(readAnnotation);\n        }\n    }\n    function readAnnotation(decorator) {\n        if (!annotation) {\n            const proto = Object.getPrototypeOf(decorator);\n            if (proto.ngMetadataName == name) {\n                annotation = decorator;\n            }\n            else if (decorator.type) {\n                const proto = Object.getPrototypeOf(decorator.type);\n                if (proto.ngMetadataName == name) {\n                    annotation = decorator.args[0];\n                }\n            }\n        }\n    }\n}\n/**\n * Keep track of compiled components. This is needed because in tests we often want to compile the\n * same component with more than one NgModule. This would cause an error unless we reset which\n * NgModule the component belongs to. We keep the list of compiled components here so that the\n * TestBed can reset it later.\n */\nlet ownerNgModule = new Map();\nlet verifiedNgModule = new Map();\nfunction resetCompiledComponents() {\n    ownerNgModule = new Map();\n    verifiedNgModule = new Map();\n    moduleQueue.length = 0;\n}\n/**\n * Computes the combined declarations of explicit declarations, as well as declarations inherited by\n * traversing the exports of imported modules.\n * @param type\n */\nfunction computeCombinedExports(type) {\n    type = resolveForwardRef(type);\n    const ngModuleDef = getNgModuleDef(type, true);\n    return [...flatten(maybeUnwrapFn(ngModuleDef.exports).map((type) => {\n            const ngModuleDef = getNgModuleDef(type);\n            if (ngModuleDef) {\n                verifySemanticsOfNgModuleDef(type, false);\n                return computeCombinedExports(type);\n            }\n            else {\n                return type;\n            }\n        }))];\n}\n/**\n * Some declared components may be compiled asynchronously, and thus may not have their\n * ɵcmp set yet. If this is the case, then a reference to the module is written into\n * the `ngSelectorScope` property of the declared type.\n */\nfunction setScopeOnDeclaredComponents(moduleType, ngModule) {\n    const declarations = flatten(ngModule.declarations || EMPTY_ARRAY$5);\n    const transitiveScopes = transitiveScopesFor(moduleType);\n    declarations.forEach(declaration => {\n        if (declaration.hasOwnProperty(NG_COMP_DEF)) {\n            // A `ɵcmp` field exists - go ahead and patch the component directly.\n            const component = declaration;\n            const componentDef = getComponentDef(component);\n            patchComponentDefWithScope(componentDef, transitiveScopes);\n        }\n        else if (!declaration.hasOwnProperty(NG_DIR_DEF) && !declaration.hasOwnProperty(NG_PIPE_DEF)) {\n            // Set `ngSelectorScope` for future reference when the component compilation finishes.\n            declaration.ngSelectorScope = moduleType;\n        }\n    });\n}\n/**\n * Patch the definition of a component with directives and pipes from the compilation scope of\n * a given module.\n */\nfunction patchComponentDefWithScope(componentDef, transitiveScopes) {\n    componentDef.directiveDefs = () => Array.from(transitiveScopes.compilation.directives)\n        .map(dir => dir.hasOwnProperty(NG_COMP_DEF) ? getComponentDef(dir) : getDirectiveDef(dir))\n        .filter(def => !!def);\n    componentDef.pipeDefs = () => Array.from(transitiveScopes.compilation.pipes).map(pipe => getPipeDef(pipe));\n    componentDef.schemas = transitiveScopes.schemas;\n    // Since we avoid Components/Directives/Pipes recompiling in case there are no overrides, we\n    // may face a problem where previously compiled defs available to a given Component/Directive\n    // are cached in TView and may become stale (in case any of these defs gets recompiled). In\n    // order to avoid this problem, we force fresh TView to be created.\n    componentDef.tView = null;\n}\n/**\n * Compute the pair of transitive scopes (compilation scope and exported scope) for a given module.\n *\n * This operation is memoized and the result is cached on the module's definition. This function can\n * be called on modules with components that have not fully compiled yet, but the result should not\n * be used until they have.\n *\n * @param moduleType module that transitive scope should be calculated for.\n */\nfunction transitiveScopesFor(moduleType) {\n    if (!isNgModule(moduleType)) {\n        throw new Error(`${moduleType.name} does not have a module def (ɵmod property)`);\n    }\n    const def = getNgModuleDef(moduleType);\n    if (def.transitiveCompileScopes !== null) {\n        return def.transitiveCompileScopes;\n    }\n    const scopes = {\n        schemas: def.schemas || null,\n        compilation: {\n            directives: new Set(),\n            pipes: new Set(),\n        },\n        exported: {\n            directives: new Set(),\n            pipes: new Set(),\n        },\n    };\n    maybeUnwrapFn(def.imports).forEach((imported) => {\n        const importedType = imported;\n        if (!isNgModule(importedType)) {\n            throw new Error(`Importing ${importedType.name} which does not have a ɵmod property`);\n        }\n        // When this module imports another, the imported module's exported directives and pipes are\n        // added to the compilation scope of this module.\n        const importedScope = transitiveScopesFor(importedType);\n        importedScope.exported.directives.forEach(entry => scopes.compilation.directives.add(entry));\n        importedScope.exported.pipes.forEach(entry => scopes.compilation.pipes.add(entry));\n    });\n    maybeUnwrapFn(def.declarations).forEach(declared => {\n        const declaredWithDefs = declared;\n        if (getPipeDef(declaredWithDefs)) {\n            scopes.compilation.pipes.add(declared);\n        }\n        else {\n            // Either declared has a ɵcmp or ɵdir, or it's a component which hasn't\n            // had its template compiled yet. In either case, it gets added to the compilation's\n            // directives.\n            scopes.compilation.directives.add(declared);\n        }\n    });\n    maybeUnwrapFn(def.exports).forEach((exported) => {\n        const exportedType = exported;\n        // Either the type is a module, a pipe, or a component/directive (which may not have a\n        // ɵcmp as it might be compiled asynchronously).\n        if (isNgModule(exportedType)) {\n            // When this module exports another, the exported module's exported directives and pipes are\n            // added to both the compilation and exported scopes of this module.\n            const exportedScope = transitiveScopesFor(exportedType);\n            exportedScope.exported.directives.forEach(entry => {\n                scopes.compilation.directives.add(entry);\n                scopes.exported.directives.add(entry);\n            });\n            exportedScope.exported.pipes.forEach(entry => {\n                scopes.compilation.pipes.add(entry);\n                scopes.exported.pipes.add(entry);\n            });\n        }\n        else if (getPipeDef(exportedType)) {\n            scopes.exported.pipes.add(exportedType);\n        }\n        else {\n            scopes.exported.directives.add(exportedType);\n        }\n    });\n    def.transitiveCompileScopes = scopes;\n    return scopes;\n}\nfunction expandModuleWithProviders(value) {\n    if (isModuleWithProviders(value)) {\n        return value.ngModule;\n    }\n    return value;\n}\nfunction isModuleWithProviders(value) {\n    return value.ngModule !== undefined;\n}\nfunction isNgModule(value) {\n    return !!getNgModuleDef(value);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Keep track of the compilation depth to avoid reentrancy issues during JIT compilation. This\n * matters in the following scenario:\n *\n * Consider a component 'A' that extends component 'B', both declared in module 'M'. During\n * the compilation of 'A' the definition of 'B' is requested to capture the inheritance chain,\n * potentially triggering compilation of 'B'. If this nested compilation were to trigger\n * `flushModuleScopingQueueAsMuchAsPossible` it may happen that module 'M' is still pending in the\n * queue, resulting in 'A' and 'B' to be patched with the NgModule scope. As the compilation of\n * 'A' is still in progress, this would introduce a circular dependency on its compilation. To avoid\n * this issue, the module scope queue is only flushed for compilations at the depth 0, to ensure\n * all compilations have finished.\n */\nlet compilationDepth = 0;\n/**\n * Compile an Angular component according to its decorator metadata, and patch the resulting\n * component def (ɵcmp) onto the component type.\n *\n * Compilation may be asynchronous (due to the need to resolve URLs for the component template or\n * other resources, for example). In the event that compilation is not immediate, `compileComponent`\n * will enqueue resource resolution into a global queue and will fail to return the `ɵcmp`\n * until the global queue has been resolved with a call to `resolveComponentResources`.\n */\nfunction compileComponent(type, metadata) {\n    // Initialize ngDevMode. This must be the first statement in compileComponent.\n    // See the `initNgDevMode` docstring for more information.\n    (typeof ngDevMode === 'undefined' || ngDevMode) && initNgDevMode();\n    let ngComponentDef = null;\n    // Metadata may have resources which need to be resolved.\n    maybeQueueResolutionOfComponentResources(type, metadata);\n    // Note that we're using the same function as `Directive`, because that's only subset of metadata\n    // that we need to create the ngFactoryDef. We're avoiding using the component metadata\n    // because we'd have to resolve the asynchronous templates.\n    addDirectiveFactoryDef(type, metadata);\n    Object.defineProperty(type, NG_COMP_DEF, {\n        get: () => {\n            if (ngComponentDef === null) {\n                const compiler = getCompilerFacade();\n                if (componentNeedsResolution(metadata)) {\n                    const error = [`Component '${type.name}' is not resolved:`];\n                    if (metadata.templateUrl) {\n                        error.push(` - templateUrl: ${metadata.templateUrl}`);\n                    }\n                    if (metadata.styleUrls && metadata.styleUrls.length) {\n                        error.push(` - styleUrls: ${JSON.stringify(metadata.styleUrls)}`);\n                    }\n                    error.push(`Did you run and wait for 'resolveComponentResources()'?`);\n                    throw new Error(error.join('\\n'));\n                }\n                // This const was called `jitOptions` previously but had to be renamed to `options` because\n                // of a bug with Terser that caused optimized JIT builds to throw a `ReferenceError`.\n                // This bug was investigated in https://github.com/angular/angular-cli/issues/17264.\n                // We should not rename it back until https://github.com/terser/terser/issues/615 is fixed.\n                const options = getJitOptions();\n                let preserveWhitespaces = metadata.preserveWhitespaces;\n                if (preserveWhitespaces === undefined) {\n                    if (options !== null && options.preserveWhitespaces !== undefined) {\n                        preserveWhitespaces = options.preserveWhitespaces;\n                    }\n                    else {\n                        preserveWhitespaces = false;\n                    }\n                }\n                let encapsulation = metadata.encapsulation;\n                if (encapsulation === undefined) {\n                    if (options !== null && options.defaultEncapsulation !== undefined) {\n                        encapsulation = options.defaultEncapsulation;\n                    }\n                    else {\n                        encapsulation = ViewEncapsulation$1.Emulated;\n                    }\n                }\n                const templateUrl = metadata.templateUrl || `ng:///${type.name}/template.html`;\n                const meta = Object.assign(Object.assign({}, directiveMetadata(type, metadata)), { typeSourceSpan: compiler.createParseSourceSpan('Component', type.name, templateUrl), template: metadata.template || '', preserveWhitespaces, styles: metadata.styles || EMPTY_ARRAY, animations: metadata.animations, directives: [], changeDetection: metadata.changeDetection, pipes: new Map(), encapsulation, interpolation: metadata.interpolation, viewProviders: metadata.viewProviders || null });\n                compilationDepth++;\n                try {\n                    if (meta.usesInheritance) {\n                        addDirectiveDefToUndecoratedParents(type);\n                    }\n                    ngComponentDef = compiler.compileComponent(angularCoreEnv, templateUrl, meta);\n                }\n                finally {\n                    // Ensure that the compilation depth is decremented even when the compilation failed.\n                    compilationDepth--;\n                }\n                if (compilationDepth === 0) {\n                    // When NgModule decorator executed, we enqueued the module definition such that\n                    // it would only dequeue and add itself as module scope to all of its declarations,\n                    // but only if  if all of its declarations had resolved. This call runs the check\n                    // to see if any modules that are in the queue can be dequeued and add scope to\n                    // their declarations.\n                    flushModuleScopingQueueAsMuchAsPossible();\n                }\n                // If component compilation is async, then the @NgModule annotation which declares the\n                // component may execute and set an ngSelectorScope property on the component type. This\n                // allows the component to patch itself with directiveDefs from the module after it\n                // finishes compiling.\n                if (hasSelectorScope(type)) {\n                    const scopes = transitiveScopesFor(type.ngSelectorScope);\n                    patchComponentDefWithScope(ngComponentDef, scopes);\n                }\n            }\n            return ngComponentDef;\n        },\n        // Make the property configurable in dev mode to allow overriding in tests\n        configurable: !!ngDevMode,\n    });\n}\nfunction hasSelectorScope(component) {\n    return component.ngSelectorScope !== undefined;\n}\n/**\n * Compile an Angular directive according to its decorator metadata, and patch the resulting\n * directive def onto the component type.\n *\n * In the event that compilation is not immediate, `compileDirective` will return a `Promise` which\n * will resolve when compilation completes and the directive becomes usable.\n */\nfunction compileDirective(type, directive) {\n    let ngDirectiveDef = null;\n    addDirectiveFactoryDef(type, directive || {});\n    Object.defineProperty(type, NG_DIR_DEF, {\n        get: () => {\n            if (ngDirectiveDef === null) {\n                // `directive` can be null in the case of abstract directives as a base class\n                // that use `@Directive()` with no selector. In that case, pass empty object to the\n                // `directiveMetadata` function instead of null.\n                const meta = getDirectiveMetadata(type, directive || {});\n                ngDirectiveDef =\n                    getCompilerFacade().compileDirective(angularCoreEnv, meta.sourceMapUrl, meta.metadata);\n            }\n            return ngDirectiveDef;\n        },\n        // Make the property configurable in dev mode to allow overriding in tests\n        configurable: !!ngDevMode,\n    });\n}\nfunction getDirectiveMetadata(type, metadata) {\n    const name = type && type.name;\n    const sourceMapUrl = `ng:///${name}/ɵdir.js`;\n    const compiler = getCompilerFacade();\n    const facade = directiveMetadata(type, metadata);\n    facade.typeSourceSpan = compiler.createParseSourceSpan('Directive', name, sourceMapUrl);\n    if (facade.usesInheritance) {\n        addDirectiveDefToUndecoratedParents(type);\n    }\n    return { metadata: facade, sourceMapUrl };\n}\nfunction addDirectiveFactoryDef(type, metadata) {\n    let ngFactoryDef = null;\n    Object.defineProperty(type, NG_FACTORY_DEF, {\n        get: () => {\n            if (ngFactoryDef === null) {\n                const meta = getDirectiveMetadata(type, metadata);\n                const compiler = getCompilerFacade();\n                ngFactoryDef = compiler.compileFactory(angularCoreEnv, `ng:///${type.name}/ɵfac.js`, Object.assign(Object.assign({}, meta.metadata), { injectFn: 'directiveInject', target: compiler.R3FactoryTarget.Directive }));\n            }\n            return ngFactoryDef;\n        },\n        // Make the property configurable in dev mode to allow overriding in tests\n        configurable: !!ngDevMode,\n    });\n}\nfunction extendsDirectlyFromObject(type) {\n    return Object.getPrototypeOf(type.prototype) === Object.prototype;\n}\n/**\n * Extract the `R3DirectiveMetadata` for a particular directive (either a `Directive` or a\n * `Component`).\n */\nfunction directiveMetadata(type, metadata) {\n    // Reflect inputs and outputs.\n    const reflect = getReflect();\n    const propMetadata = reflect.ownPropMetadata(type);\n    return {\n        name: type.name,\n        type: type,\n        typeArgumentCount: 0,\n        selector: metadata.selector !== undefined ? metadata.selector : null,\n        deps: reflectDependencies(type),\n        host: metadata.host || EMPTY_OBJ,\n        propMetadata: propMetadata,\n        inputs: metadata.inputs || EMPTY_ARRAY,\n        outputs: metadata.outputs || EMPTY_ARRAY,\n        queries: extractQueriesMetadata(type, propMetadata, isContentQuery),\n        lifecycle: { usesOnChanges: reflect.hasLifecycleHook(type, 'ngOnChanges') },\n        typeSourceSpan: null,\n        usesInheritance: !extendsDirectlyFromObject(type),\n        exportAs: extractExportAs(metadata.exportAs),\n        providers: metadata.providers || null,\n        viewQueries: extractQueriesMetadata(type, propMetadata, isViewQuery)\n    };\n}\n/**\n * Adds a directive definition to all parent classes of a type that don't have an Angular decorator.\n */\nfunction addDirectiveDefToUndecoratedParents(type) {\n    const objPrototype = Object.prototype;\n    let parent = Object.getPrototypeOf(type.prototype).constructor;\n    // Go up the prototype until we hit `Object`.\n    while (parent && parent !== objPrototype) {\n        // Since inheritance works if the class was annotated already, we only need to add\n        // the def if there are no annotations and the def hasn't been created already.\n        if (!getDirectiveDef(parent) && !getComponentDef(parent) &&\n            shouldAddAbstractDirective(parent)) {\n            compileDirective(parent, null);\n        }\n        parent = Object.getPrototypeOf(parent);\n    }\n}\nfunction convertToR3QueryPredicate(selector) {\n    return typeof selector === 'string' ? splitByComma(selector) : resolveForwardRef(selector);\n}\nfunction convertToR3QueryMetadata(propertyName, ann) {\n    return {\n        propertyName: propertyName,\n        predicate: convertToR3QueryPredicate(ann.selector),\n        descendants: ann.descendants,\n        first: ann.first,\n        read: ann.read ? ann.read : null,\n        static: !!ann.static\n    };\n}\nfunction extractQueriesMetadata(type, propMetadata, isQueryAnn) {\n    const queriesMeta = [];\n    for (const field in propMetadata) {\n        if (propMetadata.hasOwnProperty(field)) {\n            const annotations = propMetadata[field];\n            annotations.forEach(ann => {\n                if (isQueryAnn(ann)) {\n                    if (!ann.selector) {\n                        throw new Error(`Can't construct a query for the property \"${field}\" of ` +\n                            `\"${stringifyForError(type)}\" since the query selector wasn't defined.`);\n                    }\n                    if (annotations.some(isInputAnnotation)) {\n                        throw new Error(`Cannot combine @Input decorators with query decorators`);\n                    }\n                    queriesMeta.push(convertToR3QueryMetadata(field, ann));\n                }\n            });\n        }\n    }\n    return queriesMeta;\n}\nfunction extractExportAs(exportAs) {\n    return exportAs === undefined ? null : splitByComma(exportAs);\n}\nfunction isContentQuery(value) {\n    const name = value.ngMetadataName;\n    return name === 'ContentChild' || name === 'ContentChildren';\n}\nfunction isViewQuery(value) {\n    const name = value.ngMetadataName;\n    return name === 'ViewChild' || name === 'ViewChildren';\n}\nfunction isInputAnnotation(value) {\n    return value.ngMetadataName === 'Input';\n}\nfunction splitByComma(value) {\n    return value.split(',').map(piece => piece.trim());\n}\nconst LIFECYCLE_HOOKS = [\n    'ngOnChanges', 'ngOnInit', 'ngOnDestroy', 'ngDoCheck', 'ngAfterViewInit', 'ngAfterViewChecked',\n    'ngAfterContentInit', 'ngAfterContentChecked'\n];\nfunction shouldAddAbstractDirective(type) {\n    const reflect = getReflect();\n    if (LIFECYCLE_HOOKS.some(hookName => reflect.hasLifecycleHook(type, hookName))) {\n        return true;\n    }\n    const propMetadata = reflect.propMetadata(type);\n    for (const field in propMetadata) {\n        const annotations = propMetadata[field];\n        for (let i = 0; i < annotations.length; i++) {\n            const current = annotations[i];\n            const metadataName = current.ngMetadataName;\n            if (isInputAnnotation(current) || isContentQuery(current) || isViewQuery(current) ||\n                metadataName === 'Output' || metadataName === 'HostBinding' ||\n                metadataName === 'HostListener') {\n                return true;\n            }\n        }\n    }\n    return false;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction compilePipe(type, meta) {\n    let ngPipeDef = null;\n    let ngFactoryDef = null;\n    Object.defineProperty(type, NG_FACTORY_DEF, {\n        get: () => {\n            if (ngFactoryDef === null) {\n                const metadata = getPipeMetadata(type, meta);\n                const compiler = getCompilerFacade();\n                ngFactoryDef = compiler.compileFactory(angularCoreEnv, `ng:///${metadata.name}/ɵfac.js`, Object.assign(Object.assign({}, metadata), { injectFn: 'directiveInject', target: compiler.R3FactoryTarget.Pipe }));\n            }\n            return ngFactoryDef;\n        },\n        // Make the property configurable in dev mode to allow overriding in tests\n        configurable: !!ngDevMode,\n    });\n    Object.defineProperty(type, NG_PIPE_DEF, {\n        get: () => {\n            if (ngPipeDef === null) {\n                const metadata = getPipeMetadata(type, meta);\n                ngPipeDef = getCompilerFacade().compilePipe(angularCoreEnv, `ng:///${metadata.name}/ɵpipe.js`, metadata);\n            }\n            return ngPipeDef;\n        },\n        // Make the property configurable in dev mode to allow overriding in tests\n        configurable: !!ngDevMode,\n    });\n}\nfunction getPipeMetadata(type, meta) {\n    return {\n        type: type,\n        typeArgumentCount: 0,\n        name: type.name,\n        deps: reflectDependencies(type),\n        pipeName: meta.name,\n        pure: meta.pure !== undefined ? meta.pure : true\n    };\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst ɵ0$e = (dir = {}) => dir, ɵ1$3 = (type, meta) => SWITCH_COMPILE_DIRECTIVE(type, meta);\n/**\n * Type of the Directive metadata.\n *\n * @publicApi\n */\nconst Directive = makeDecorator('Directive', ɵ0$e, undefined, undefined, ɵ1$3);\nconst ɵ2$1 = (c = {}) => (Object.assign({ changeDetection: ChangeDetectionStrategy.Default }, c)), ɵ3$1 = (type, meta) => SWITCH_COMPILE_COMPONENT(type, meta);\n/**\n * Component decorator and metadata.\n *\n * @Annotation\n * @publicApi\n */\nconst Component = makeDecorator('Component', ɵ2$1, Directive, undefined, ɵ3$1);\nconst ɵ4 = (p) => (Object.assign({ pure: true }, p)), ɵ5 = (type, meta) => SWITCH_COMPILE_PIPE(type, meta);\n/**\n * @Annotation\n * @publicApi\n */\nconst Pipe = makeDecorator('Pipe', ɵ4, undefined, undefined, ɵ5);\nconst ɵ6 = (bindingPropertyName) => ({ bindingPropertyName });\n/**\n * @Annotation\n * @publicApi\n */\nconst Input = makePropDecorator('Input', ɵ6);\nconst ɵ7 = (bindingPropertyName) => ({ bindingPropertyName });\n/**\n * @Annotation\n * @publicApi\n */\nconst Output = makePropDecorator('Output', ɵ7);\nconst ɵ8 = (hostPropertyName) => ({ hostPropertyName });\n/**\n * @Annotation\n * @publicApi\n */\nconst HostBinding = makePropDecorator('HostBinding', ɵ8);\nconst ɵ9 = (eventName, args) => ({ eventName, args });\n/**\n * Decorator that binds a DOM event to a host listener and supplies configuration metadata.\n * Angular invokes the supplied handler method when the host element emits the specified event,\n * and updates the bound element with the result.\n *\n * If the handler method returns false, applies `preventDefault` on the bound element.\n *\n * @usageNotes\n *\n * The following example declares a directive\n * that attaches a click listener to a button and counts clicks.\n *\n * ```ts\n * @Directive({selector: 'button[counting]'})\n * class CountClicks {\n *   numberOfClicks = 0;\n *\n *   @HostListener('click', ['$event.target'])\n *   onClick(btn) {\n *     console.log('button', btn, 'number of clicks:', this.numberOfClicks++);\n *  }\n * }\n *\n * @Component({\n *   selector: 'app',\n *   template: '<button counting>Increment</button>',\n * })\n * class App {}\n *\n * ```\n *\n * The following example registers another DOM event handler that listens for key-press events.\n * ``` ts\n * import { HostListener, Component } from \"@angular/core\";\n *\n * @Component({\n *   selector: 'app',\n *   template: `<h1>Hello, you have pressed keys {{counter}} number of times!</h1> Press any key to\n * increment the counter.\n *   <button (click)=\"resetCounter()\">Reset Counter</button>`\n * })\n * class AppComponent {\n *   counter = 0;\n *   @HostListener('window:keydown', ['$event'])\n *   handleKeyDown(event: KeyboardEvent) {\n *     this.counter++;\n *   }\n *   resetCounter() {\n *     this.counter = 0;\n *   }\n * }\n * ```\n *\n * @Annotation\n * @publicApi\n */\nconst HostListener = makePropDecorator('HostListener', ɵ9);\nconst SWITCH_COMPILE_COMPONENT__POST_R3__ = compileComponent;\nconst SWITCH_COMPILE_DIRECTIVE__POST_R3__ = compileDirective;\nconst SWITCH_COMPILE_PIPE__POST_R3__ = compilePipe;\nconst SWITCH_COMPILE_COMPONENT__PRE_R3__ = noop;\nconst SWITCH_COMPILE_DIRECTIVE__PRE_R3__ = noop;\nconst SWITCH_COMPILE_PIPE__PRE_R3__ = noop;\nconst SWITCH_COMPILE_COMPONENT = SWITCH_COMPILE_COMPONENT__POST_R3__;\nconst SWITCH_COMPILE_DIRECTIVE = SWITCH_COMPILE_DIRECTIVE__POST_R3__;\nconst SWITCH_COMPILE_PIPE = SWITCH_COMPILE_PIPE__POST_R3__;\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst ɵ0$f = (ngModule) => ngModule, ɵ1$4 = \n/**\n * Decorator that marks the following class as an NgModule, and supplies\n * configuration metadata for it.\n *\n * * The `declarations` and `entryComponents` options configure the compiler\n * with information about what belongs to the NgModule.\n * * The `providers` options configures the NgModule's injector to provide\n * dependencies the NgModule members.\n * * The `imports` and `exports` options bring in members from other modules, and make\n * this module's members available to others.\n */\n(type, meta) => SWITCH_COMPILE_NGMODULE(type, meta);\n/**\n * @Annotation\n * @publicApi\n */\nconst NgModule = makeDecorator('NgModule', ɵ0$f, undefined, undefined, ɵ1$4);\nfunction preR3NgModuleCompile(moduleType, metadata) {\n    let imports = (metadata && metadata.imports) || [];\n    if (metadata && metadata.exports) {\n        imports = [...imports, metadata.exports];\n    }\n    moduleType.ɵinj = ɵɵdefineInjector({\n        factory: convertInjectableProviderToFactory(moduleType, { useClass: moduleType }),\n        providers: metadata && metadata.providers,\n        imports: imports,\n    });\n}\nconst SWITCH_COMPILE_NGMODULE__POST_R3__ = compileNgModule;\nconst SWITCH_COMPILE_NGMODULE__PRE_R3__ = preR3NgModuleCompile;\nconst SWITCH_COMPILE_NGMODULE = SWITCH_COMPILE_NGMODULE__POST_R3__;\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * A [DI token](guide/glossary#di-token \"DI token definition\") that you can use to provide\n * one or more initialization functions.\n *\n * The provided functions are injected at application startup and executed during\n * app initialization. If any of these functions returns a Promise, initialization\n * does not complete until the Promise is resolved.\n *\n * You can, for example, create a factory function that loads language data\n * or an external configuration, and provide that function to the `APP_INITIALIZER` token.\n * The function is executed during the application bootstrap process,\n * and the needed data is available on startup.\n *\n * @see `ApplicationInitStatus`\n *\n * @publicApi\n */\nconst APP_INITIALIZER = new InjectionToken('Application Initializer');\n/**\n * A class that reflects the state of running {@link APP_INITIALIZER} functions.\n *\n * @publicApi\n */\nclass ApplicationInitStatus {\n    constructor(appInits) {\n        this.appInits = appInits;\n        this.initialized = false;\n        this.done = false;\n        this.donePromise = new Promise((res, rej) => {\n            this.resolve = res;\n            this.reject = rej;\n        });\n    }\n    /** @internal */\n    runInitializers() {\n        if (this.initialized) {\n            return;\n        }\n        const asyncInitPromises = [];\n        const complete = () => {\n            this.done = true;\n            this.resolve();\n        };\n        if (this.appInits) {\n            for (let i = 0; i < this.appInits.length; i++) {\n                const initResult = this.appInits[i]();\n                if (isPromise(initResult)) {\n                    asyncInitPromises.push(initResult);\n                }\n            }\n        }\n        Promise.all(asyncInitPromises)\n            .then(() => {\n            complete();\n        })\n            .catch(e => {\n            this.reject(e);\n        });\n        if (asyncInitPromises.length === 0) {\n            complete();\n        }\n        this.initialized = true;\n    }\n}\nApplicationInitStatus.ɵfac = function ApplicationInitStatus_Factory(t) { return new (t || ApplicationInitStatus)(ɵɵinject(APP_INITIALIZER, 8)); };\nApplicationInitStatus.ɵprov = ɵɵdefineInjectable({ token: ApplicationInitStatus, factory: ApplicationInitStatus.ɵfac });\nApplicationInitStatus.ctorParameters = () => [\n    { type: Array, decorators: [{ type: Inject, args: [APP_INITIALIZER,] }, { type: Optional }] }\n];\n/*@__PURE__*/ (function () { setClassMetadata(ApplicationInitStatus, [{\n        type: Injectable\n    }], function () { return [{ type: Array, decorators: [{\n                type: Inject,\n                args: [APP_INITIALIZER]\n            }, {\n                type: Optional\n            }] }]; }, null); })();\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * A [DI token](guide/glossary#di-token \"DI token definition\") representing a unique string ID, used\n * primarily for prefixing application attributes and CSS styles when\n * {@link ViewEncapsulation#Emulated ViewEncapsulation.Emulated} is being used.\n *\n * BY default, the value is randomly generated and assigned to the application by Angular.\n * To provide a custom ID value, use a DI provider <!-- TODO: provider --> to configure\n * the root {@link Injector} that uses this token.\n *\n * @publicApi\n */\nconst APP_ID = new InjectionToken('AppId');\nfunction _appIdRandomProviderFactory() {\n    return `${_randomChar()}${_randomChar()}${_randomChar()}`;\n}\n/**\n * Providers that generate a random `APP_ID_TOKEN`.\n * @publicApi\n */\nconst APP_ID_RANDOM_PROVIDER = {\n    provide: APP_ID,\n    useFactory: _appIdRandomProviderFactory,\n    deps: [],\n};\nfunction _randomChar() {\n    return String.fromCharCode(97 + Math.floor(Math.random() * 25));\n}\n/**\n * A function that is executed when a platform is initialized.\n * @publicApi\n */\nconst PLATFORM_INITIALIZER = new InjectionToken('Platform Initializer');\n/**\n * A token that indicates an opaque platform ID.\n * @publicApi\n */\nconst PLATFORM_ID = new InjectionToken('Platform ID');\n/**\n * A [DI token](guide/glossary#di-token \"DI token definition\") that provides a set of callbacks to\n * be called for every component that is bootstrapped.\n *\n * Each callback must take a `ComponentRef` instance and return nothing.\n *\n * `(componentRef: ComponentRef) => void`\n *\n * @publicApi\n */\nconst APP_BOOTSTRAP_LISTENER = new InjectionToken('appBootstrapListener');\n/**\n * A [DI token](guide/glossary#di-token \"DI token definition\") that indicates the root directory of\n * the application\n * @publicApi\n */\nconst PACKAGE_ROOT_URL = new InjectionToken('Application Packages Root URL');\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass Console {\n    log(message) {\n        // tslint:disable-next-line:no-console\n        console.log(message);\n    }\n    // Note: for reporting errors use `DOM.logError()` as it is platform specific\n    warn(message) {\n        // tslint:disable-next-line:no-console\n        console.warn(message);\n    }\n}\nConsole.ɵfac = function Console_Factory(t) { return new (t || Console)(); };\nConsole.ɵprov = ɵɵdefineInjectable({ token: Console, factory: Console.ɵfac });\n/*@__PURE__*/ (function () { setClassMetadata(Console, [{\n        type: Injectable\n    }], null, null); })();\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Provide this token to set the locale of your application.\n * It is used for i18n extraction, by i18n pipes (DatePipe, I18nPluralPipe, CurrencyPipe,\n * DecimalPipe and PercentPipe) and by ICU expressions.\n *\n * See the [i18n guide](guide/i18n#setting-up-locale) for more information.\n *\n * @usageNotes\n * ### Example\n *\n * ```typescript\n * import { LOCALE_ID } from '@angular/core';\n * import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';\n * import { AppModule } from './app/app.module';\n *\n * platformBrowserDynamic().bootstrapModule(AppModule, {\n *   providers: [{provide: LOCALE_ID, useValue: 'en-US' }]\n * });\n * ```\n *\n * @publicApi\n */\nconst LOCALE_ID$1 = new InjectionToken('LocaleId');\n/**\n * Provide this token to set the default currency code your application uses for\n * CurrencyPipe when there is no currency code passed into it. This is only used by\n * CurrencyPipe and has no relation to locale currency. Defaults to USD if not configured.\n *\n * See the [i18n guide](guide/i18n#setting-up-locale) for more information.\n *\n * <div class=\"alert is-helpful\">\n *\n * **Deprecation notice:**\n *\n * The default currency code is currently always `USD` but this is deprecated from v9.\n *\n * **In v10 the default currency code will be taken from the current locale.**\n *\n * If you need the previous behavior then set it by creating a `DEFAULT_CURRENCY_CODE` provider in\n * your application `NgModule`:\n *\n * ```ts\n * {provide: DEFAULT_CURRENCY_CODE, useValue: 'USD'}\n * ```\n *\n * </div>\n *\n * @usageNotes\n * ### Example\n *\n * ```typescript\n * import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';\n * import { AppModule } from './app/app.module';\n *\n * platformBrowserDynamic().bootstrapModule(AppModule, {\n *   providers: [{provide: DEFAULT_CURRENCY_CODE, useValue: 'EUR' }]\n * });\n * ```\n *\n * @publicApi\n */\nconst DEFAULT_CURRENCY_CODE = new InjectionToken('DefaultCurrencyCode');\n/**\n * Use this token at bootstrap to provide the content of your translation file (`xtb`,\n * `xlf` or `xlf2`) when you want to translate your application in another language.\n *\n * See the [i18n guide](guide/i18n#merge) for more information.\n *\n * @usageNotes\n * ### Example\n *\n * ```typescript\n * import { TRANSLATIONS } from '@angular/core';\n * import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';\n * import { AppModule } from './app/app.module';\n *\n * // content of your translation file\n * const translations = '....';\n *\n * platformBrowserDynamic().bootstrapModule(AppModule, {\n *   providers: [{provide: TRANSLATIONS, useValue: translations }]\n * });\n * ```\n *\n * @publicApi\n */\nconst TRANSLATIONS = new InjectionToken('Translations');\n/**\n * Provide this token at bootstrap to set the format of your {@link TRANSLATIONS}: `xtb`,\n * `xlf` or `xlf2`.\n *\n * See the [i18n guide](guide/i18n#merge) for more information.\n *\n * @usageNotes\n * ### Example\n *\n * ```typescript\n * import { TRANSLATIONS_FORMAT } from '@angular/core';\n * import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';\n * import { AppModule } from './app/app.module';\n *\n * platformBrowserDynamic().bootstrapModule(AppModule, {\n *   providers: [{provide: TRANSLATIONS_FORMAT, useValue: 'xlf' }]\n * });\n * ```\n *\n * @publicApi\n */\nconst TRANSLATIONS_FORMAT = new InjectionToken('TranslationsFormat');\n/**\n * Use this enum at bootstrap as an option of `bootstrapModule` to define the strategy\n * that the compiler should use in case of missing translations:\n * - Error: throw if you have missing translations.\n * - Warning (default): show a warning in the console and/or shell.\n * - Ignore: do nothing.\n *\n * See the [i18n guide](guide/i18n#missing-translation) for more information.\n *\n * @usageNotes\n * ### Example\n * ```typescript\n * import { MissingTranslationStrategy } from '@angular/core';\n * import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';\n * import { AppModule } from './app/app.module';\n *\n * platformBrowserDynamic().bootstrapModule(AppModule, {\n *   missingTranslation: MissingTranslationStrategy.Error\n * });\n * ```\n *\n * @publicApi\n */\nvar MissingTranslationStrategy;\n(function (MissingTranslationStrategy) {\n    MissingTranslationStrategy[MissingTranslationStrategy[\"Error\"] = 0] = \"Error\";\n    MissingTranslationStrategy[MissingTranslationStrategy[\"Warning\"] = 1] = \"Warning\";\n    MissingTranslationStrategy[MissingTranslationStrategy[\"Ignore\"] = 2] = \"Ignore\";\n})(MissingTranslationStrategy || (MissingTranslationStrategy = {}));\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst SWITCH_IVY_ENABLED__POST_R3__ = true;\nconst SWITCH_IVY_ENABLED__PRE_R3__ = false;\nconst ivyEnabled = SWITCH_IVY_ENABLED__POST_R3__;\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Combination of NgModuleFactory and ComponentFactorys.\n *\n * @publicApi\n */\nclass ModuleWithComponentFactories {\n    constructor(ngModuleFactory, componentFactories) {\n        this.ngModuleFactory = ngModuleFactory;\n        this.componentFactories = componentFactories;\n    }\n}\nfunction _throwError() {\n    throw new Error(`Runtime compiler is not loaded`);\n}\nconst Compiler_compileModuleSync__PRE_R3__ = _throwError;\nconst Compiler_compileModuleSync__POST_R3__ = function (moduleType) {\n    return new NgModuleFactory$1(moduleType);\n};\nconst Compiler_compileModuleSync = Compiler_compileModuleSync__POST_R3__;\nconst Compiler_compileModuleAsync__PRE_R3__ = _throwError;\nconst Compiler_compileModuleAsync__POST_R3__ = function (moduleType) {\n    return Promise.resolve(Compiler_compileModuleSync__POST_R3__(moduleType));\n};\nconst Compiler_compileModuleAsync = Compiler_compileModuleAsync__POST_R3__;\nconst Compiler_compileModuleAndAllComponentsSync__PRE_R3__ = _throwError;\nconst Compiler_compileModuleAndAllComponentsSync__POST_R3__ = function (moduleType) {\n    const ngModuleFactory = Compiler_compileModuleSync__POST_R3__(moduleType);\n    const moduleDef = getNgModuleDef(moduleType);\n    const componentFactories = maybeUnwrapFn(moduleDef.declarations)\n        .reduce((factories, declaration) => {\n        const componentDef = getComponentDef(declaration);\n        componentDef && factories.push(new ComponentFactory$1(componentDef));\n        return factories;\n    }, []);\n    return new ModuleWithComponentFactories(ngModuleFactory, componentFactories);\n};\nconst Compiler_compileModuleAndAllComponentsSync = Compiler_compileModuleAndAllComponentsSync__POST_R3__;\nconst Compiler_compileModuleAndAllComponentsAsync__PRE_R3__ = _throwError;\nconst Compiler_compileModuleAndAllComponentsAsync__POST_R3__ = function (moduleType) {\n    return Promise.resolve(Compiler_compileModuleAndAllComponentsSync__POST_R3__(moduleType));\n};\nconst Compiler_compileModuleAndAllComponentsAsync = Compiler_compileModuleAndAllComponentsAsync__POST_R3__;\n/**\n * Low-level service for running the angular compiler during runtime\n * to create {@link ComponentFactory}s, which\n * can later be used to create and render a Component instance.\n *\n * Each `@NgModule` provides an own `Compiler` to its injector,\n * that will use the directives/pipes of the ng module for compilation\n * of components.\n *\n * @publicApi\n */\nclass Compiler {\n    constructor() {\n        /**\n         * Compiles the given NgModule and all of its components. All templates of the components listed\n         * in `entryComponents` have to be inlined.\n         */\n        this.compileModuleSync = Compiler_compileModuleSync;\n        /**\n         * Compiles the given NgModule and all of its components\n         */\n        this.compileModuleAsync = Compiler_compileModuleAsync;\n        /**\n         * Same as {@link #compileModuleSync} but also creates ComponentFactories for all components.\n         */\n        this.compileModuleAndAllComponentsSync = Compiler_compileModuleAndAllComponentsSync;\n        /**\n         * Same as {@link #compileModuleAsync} but also creates ComponentFactories for all components.\n         */\n        this.compileModuleAndAllComponentsAsync = Compiler_compileModuleAndAllComponentsAsync;\n    }\n    /**\n     * Clears all caches.\n     */\n    clearCache() { }\n    /**\n     * Clears the cache for the given component/ngModule.\n     */\n    clearCacheFor(type) { }\n    /**\n     * Returns the id for a given NgModule, if one is defined and known to the compiler.\n     */\n    getModuleId(moduleType) {\n        return undefined;\n    }\n}\nCompiler.ɵfac = function Compiler_Factory(t) { return new (t || Compiler)(); };\nCompiler.ɵprov = ɵɵdefineInjectable({ token: Compiler, factory: Compiler.ɵfac });\n/*@__PURE__*/ (function () { setClassMetadata(Compiler, [{\n        type: Injectable\n    }], function () { return []; }, null); })();\n/**\n * Token to provide CompilerOptions in the platform injector.\n *\n * @publicApi\n */\nconst COMPILER_OPTIONS = new InjectionToken('compilerOptions');\n/**\n * A factory for creating a Compiler\n *\n * @publicApi\n */\nclass CompilerFactory {\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst promise = (() => Promise.resolve(0))();\nfunction scheduleMicroTask(fn) {\n    if (typeof Zone === 'undefined') {\n        // use promise to schedule microTask instead of use Zone\n        promise.then(() => {\n            fn && fn.apply(null, null);\n        });\n    }\n    else {\n        Zone.current.scheduleMicroTask('scheduleMicrotask', fn);\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction getNativeRequestAnimationFrame() {\n    let nativeRequestAnimationFrame = _global['requestAnimationFrame'];\n    let nativeCancelAnimationFrame = _global['cancelAnimationFrame'];\n    if (typeof Zone !== 'undefined' && nativeRequestAnimationFrame && nativeCancelAnimationFrame) {\n        // use unpatched version of requestAnimationFrame(native delegate) if possible\n        // to avoid another Change detection\n        const unpatchedRequestAnimationFrame = nativeRequestAnimationFrame[Zone.__symbol__('OriginalDelegate')];\n        if (unpatchedRequestAnimationFrame) {\n            nativeRequestAnimationFrame = unpatchedRequestAnimationFrame;\n        }\n        const unpatchedCancelAnimationFrame = nativeCancelAnimationFrame[Zone.__symbol__('OriginalDelegate')];\n        if (unpatchedCancelAnimationFrame) {\n            nativeCancelAnimationFrame = unpatchedCancelAnimationFrame;\n        }\n    }\n    return { nativeRequestAnimationFrame, nativeCancelAnimationFrame };\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * An injectable service for executing work inside or outside of the Angular zone.\n *\n * The most common use of this service is to optimize performance when starting a work consisting of\n * one or more asynchronous tasks that don't require UI updates or error handling to be handled by\n * Angular. Such tasks can be kicked off via {@link #runOutsideAngular} and if needed, these tasks\n * can reenter the Angular zone via {@link #run}.\n *\n * <!-- TODO: add/fix links to:\n *   - docs explaining zones and the use of zones in Angular and change-detection\n *   - link to runOutsideAngular/run (throughout this file!)\n *   -->\n *\n * @usageNotes\n * ### Example\n *\n * ```\n * import {Component, NgZone} from '@angular/core';\n * import {NgIf} from '@angular/common';\n *\n * @Component({\n *   selector: 'ng-zone-demo',\n *   template: `\n *     <h2>Demo: NgZone</h2>\n *\n *     <p>Progress: {{progress}}%</p>\n *     <p *ngIf=\"progress >= 100\">Done processing {{label}} of Angular zone!</p>\n *\n *     <button (click)=\"processWithinAngularZone()\">Process within Angular zone</button>\n *     <button (click)=\"processOutsideOfAngularZone()\">Process outside of Angular zone</button>\n *   `,\n * })\n * export class NgZoneDemo {\n *   progress: number = 0;\n *   label: string;\n *\n *   constructor(private _ngZone: NgZone) {}\n *\n *   // Loop inside the Angular zone\n *   // so the UI DOES refresh after each setTimeout cycle\n *   processWithinAngularZone() {\n *     this.label = 'inside';\n *     this.progress = 0;\n *     this._increaseProgress(() => console.log('Inside Done!'));\n *   }\n *\n *   // Loop outside of the Angular zone\n *   // so the UI DOES NOT refresh after each setTimeout cycle\n *   processOutsideOfAngularZone() {\n *     this.label = 'outside';\n *     this.progress = 0;\n *     this._ngZone.runOutsideAngular(() => {\n *       this._increaseProgress(() => {\n *         // reenter the Angular zone and display done\n *         this._ngZone.run(() => { console.log('Outside Done!'); });\n *       });\n *     });\n *   }\n *\n *   _increaseProgress(doneCallback: () => void) {\n *     this.progress += 1;\n *     console.log(`Current progress: ${this.progress}%`);\n *\n *     if (this.progress < 100) {\n *       window.setTimeout(() => this._increaseProgress(doneCallback), 10);\n *     } else {\n *       doneCallback();\n *     }\n *   }\n * }\n * ```\n *\n * @publicApi\n */\nclass NgZone {\n    constructor({ enableLongStackTrace = false, shouldCoalesceEventChangeDetection = false }) {\n        this.hasPendingMacrotasks = false;\n        this.hasPendingMicrotasks = false;\n        /**\n         * Whether there are no outstanding microtasks or macrotasks.\n         */\n        this.isStable = true;\n        /**\n         * Notifies when code enters Angular Zone. This gets fired first on VM Turn.\n         */\n        this.onUnstable = new EventEmitter(false);\n        /**\n         * Notifies when there is no more microtasks enqueued in the current VM Turn.\n         * This is a hint for Angular to do change detection, which may enqueue more microtasks.\n         * For this reason this event can fire multiple times per VM Turn.\n         */\n        this.onMicrotaskEmpty = new EventEmitter(false);\n        /**\n         * Notifies when the last `onMicrotaskEmpty` has run and there are no more microtasks, which\n         * implies we are about to relinquish VM turn.\n         * This event gets called just once.\n         */\n        this.onStable = new EventEmitter(false);\n        /**\n         * Notifies that an error has been delivered.\n         */\n        this.onError = new EventEmitter(false);\n        if (typeof Zone == 'undefined') {\n            throw new Error(`In this configuration Angular requires Zone.js`);\n        }\n        Zone.assertZonePatched();\n        const self = this;\n        self._nesting = 0;\n        self._outer = self._inner = Zone.current;\n        if (Zone['wtfZoneSpec']) {\n            self._inner = self._inner.fork(Zone['wtfZoneSpec']);\n        }\n        if (Zone['TaskTrackingZoneSpec']) {\n            self._inner = self._inner.fork(new Zone['TaskTrackingZoneSpec']);\n        }\n        if (enableLongStackTrace && Zone['longStackTraceZoneSpec']) {\n            self._inner = self._inner.fork(Zone['longStackTraceZoneSpec']);\n        }\n        self.shouldCoalesceEventChangeDetection = shouldCoalesceEventChangeDetection;\n        self.lastRequestAnimationFrameId = -1;\n        self.nativeRequestAnimationFrame = getNativeRequestAnimationFrame().nativeRequestAnimationFrame;\n        forkInnerZoneWithAngularBehavior(self);\n    }\n    static isInAngularZone() {\n        return Zone.current.get('isAngularZone') === true;\n    }\n    static assertInAngularZone() {\n        if (!NgZone.isInAngularZone()) {\n            throw new Error('Expected to be in Angular Zone, but it is not!');\n        }\n    }\n    static assertNotInAngularZone() {\n        if (NgZone.isInAngularZone()) {\n            throw new Error('Expected to not be in Angular Zone, but it is!');\n        }\n    }\n    /**\n     * Executes the `fn` function synchronously within the Angular zone and returns value returned by\n     * the function.\n     *\n     * Running functions via `run` allows you to reenter Angular zone from a task that was executed\n     * outside of the Angular zone (typically started via {@link #runOutsideAngular}).\n     *\n     * Any future tasks or microtasks scheduled from within this function will continue executing from\n     * within the Angular zone.\n     *\n     * If a synchronous error happens it will be rethrown and not reported via `onError`.\n     */\n    run(fn, applyThis, applyArgs) {\n        return this._inner.run(fn, applyThis, applyArgs);\n    }\n    /**\n     * Executes the `fn` function synchronously within the Angular zone as a task and returns value\n     * returned by the function.\n     *\n     * Running functions via `run` allows you to reenter Angular zone from a task that was executed\n     * outside of the Angular zone (typically started via {@link #runOutsideAngular}).\n     *\n     * Any future tasks or microtasks scheduled from within this function will continue executing from\n     * within the Angular zone.\n     *\n     * If a synchronous error happens it will be rethrown and not reported via `onError`.\n     */\n    runTask(fn, applyThis, applyArgs, name) {\n        const zone = this._inner;\n        const task = zone.scheduleEventTask('NgZoneEvent: ' + name, fn, EMPTY_PAYLOAD, noop$1, noop$1);\n        try {\n            return zone.runTask(task, applyThis, applyArgs);\n        }\n        finally {\n            zone.cancelTask(task);\n        }\n    }\n    /**\n     * Same as `run`, except that synchronous errors are caught and forwarded via `onError` and not\n     * rethrown.\n     */\n    runGuarded(fn, applyThis, applyArgs) {\n        return this._inner.runGuarded(fn, applyThis, applyArgs);\n    }\n    /**\n     * Executes the `fn` function synchronously in Angular's parent zone and returns value returned by\n     * the function.\n     *\n     * Running functions via {@link #runOutsideAngular} allows you to escape Angular's zone and do\n     * work that\n     * doesn't trigger Angular change-detection or is subject to Angular's error handling.\n     *\n     * Any future tasks or microtasks scheduled from within this function will continue executing from\n     * outside of the Angular zone.\n     *\n     * Use {@link #run} to reenter the Angular zone and do work that updates the application model.\n     */\n    runOutsideAngular(fn) {\n        return this._outer.run(fn);\n    }\n}\nfunction noop$1() { }\nconst EMPTY_PAYLOAD = {};\nfunction checkStable(zone) {\n    if (zone._nesting == 0 && !zone.hasPendingMicrotasks && !zone.isStable) {\n        try {\n            zone._nesting++;\n            zone.onMicrotaskEmpty.emit(null);\n        }\n        finally {\n            zone._nesting--;\n            if (!zone.hasPendingMicrotasks) {\n                try {\n                    zone.runOutsideAngular(() => zone.onStable.emit(null));\n                }\n                finally {\n                    zone.isStable = true;\n                }\n            }\n        }\n    }\n}\nfunction delayChangeDetectionForEvents(zone) {\n    if (zone.lastRequestAnimationFrameId !== -1) {\n        return;\n    }\n    zone.lastRequestAnimationFrameId = zone.nativeRequestAnimationFrame.call(_global, () => {\n        // This is a work around for https://github.com/angular/angular/issues/36839.\n        // The core issue is that when event coalescing is enabled it is possible for microtasks\n        // to get flushed too early (As is the case with `Promise.then`) between the\n        // coalescing eventTasks.\n        //\n        // To workaround this we schedule a \"fake\" eventTask before we process the\n        // coalescing eventTasks. The benefit of this is that the \"fake\" container eventTask\n        //  will prevent the microtasks queue from getting drained in between the coalescing\n        // eventTask execution.\n        if (!zone.fakeTopEventTask) {\n            zone.fakeTopEventTask = Zone.root.scheduleEventTask('fakeTopEventTask', () => {\n                zone.lastRequestAnimationFrameId = -1;\n                updateMicroTaskStatus(zone);\n                checkStable(zone);\n            }, undefined, () => { }, () => { });\n        }\n        zone.fakeTopEventTask.invoke();\n    });\n    updateMicroTaskStatus(zone);\n}\nfunction forkInnerZoneWithAngularBehavior(zone) {\n    const delayChangeDetectionForEventsDelegate = () => {\n        delayChangeDetectionForEvents(zone);\n    };\n    const maybeDelayChangeDetection = !!zone.shouldCoalesceEventChangeDetection &&\n        zone.nativeRequestAnimationFrame && delayChangeDetectionForEventsDelegate;\n    zone._inner = zone._inner.fork({\n        name: 'angular',\n        properties: { 'isAngularZone': true, 'maybeDelayChangeDetection': maybeDelayChangeDetection },\n        onInvokeTask: (delegate, current, target, task, applyThis, applyArgs) => {\n            try {\n                onEnter(zone);\n                return delegate.invokeTask(target, task, applyThis, applyArgs);\n            }\n            finally {\n                if (maybeDelayChangeDetection && task.type === 'eventTask') {\n                    maybeDelayChangeDetection();\n                }\n                onLeave(zone);\n            }\n        },\n        onInvoke: (delegate, current, target, callback, applyThis, applyArgs, source) => {\n            try {\n                onEnter(zone);\n                return delegate.invoke(target, callback, applyThis, applyArgs, source);\n            }\n            finally {\n                onLeave(zone);\n            }\n        },\n        onHasTask: (delegate, current, target, hasTaskState) => {\n            delegate.hasTask(target, hasTaskState);\n            if (current === target) {\n                // We are only interested in hasTask events which originate from our zone\n                // (A child hasTask event is not interesting to us)\n                if (hasTaskState.change == 'microTask') {\n                    zone._hasPendingMicrotasks = hasTaskState.microTask;\n                    updateMicroTaskStatus(zone);\n                    checkStable(zone);\n                }\n                else if (hasTaskState.change == 'macroTask') {\n                    zone.hasPendingMacrotasks = hasTaskState.macroTask;\n                }\n            }\n        },\n        onHandleError: (delegate, current, target, error) => {\n            delegate.handleError(target, error);\n            zone.runOutsideAngular(() => zone.onError.emit(error));\n            return false;\n        }\n    });\n}\nfunction updateMicroTaskStatus(zone) {\n    if (zone._hasPendingMicrotasks ||\n        (zone.shouldCoalesceEventChangeDetection && zone.lastRequestAnimationFrameId !== -1)) {\n        zone.hasPendingMicrotasks = true;\n    }\n    else {\n        zone.hasPendingMicrotasks = false;\n    }\n}\nfunction onEnter(zone) {\n    zone._nesting++;\n    if (zone.isStable) {\n        zone.isStable = false;\n        zone.onUnstable.emit(null);\n    }\n}\nfunction onLeave(zone) {\n    zone._nesting--;\n    checkStable(zone);\n}\n/**\n * Provides a noop implementation of `NgZone` which does nothing. This zone requires explicit calls\n * to framework to perform rendering.\n */\nclass NoopNgZone {\n    constructor() {\n        this.hasPendingMicrotasks = false;\n        this.hasPendingMacrotasks = false;\n        this.isStable = true;\n        this.onUnstable = new EventEmitter();\n        this.onMicrotaskEmpty = new EventEmitter();\n        this.onStable = new EventEmitter();\n        this.onError = new EventEmitter();\n    }\n    run(fn, applyThis, applyArgs) {\n        return fn.apply(applyThis, applyArgs);\n    }\n    runGuarded(fn, applyThis, applyArgs) {\n        return fn.apply(applyThis, applyArgs);\n    }\n    runOutsideAngular(fn) {\n        return fn();\n    }\n    runTask(fn, applyThis, applyArgs, name) {\n        return fn.apply(applyThis, applyArgs);\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * The Testability service provides testing hooks that can be accessed from\n * the browser and by services such as Protractor. Each bootstrapped Angular\n * application on the page will have an instance of Testability.\n * @publicApi\n */\nclass Testability {\n    constructor(_ngZone) {\n        this._ngZone = _ngZone;\n        this._pendingCount = 0;\n        this._isZoneStable = true;\n        /**\n         * Whether any work was done since the last 'whenStable' callback. This is\n         * useful to detect if this could have potentially destabilized another\n         * component while it is stabilizing.\n         * @internal\n         */\n        this._didWork = false;\n        this._callbacks = [];\n        this.taskTrackingZone = null;\n        this._watchAngularEvents();\n        _ngZone.run(() => {\n            this.taskTrackingZone =\n                typeof Zone == 'undefined' ? null : Zone.current.get('TaskTrackingZone');\n        });\n    }\n    _watchAngularEvents() {\n        this._ngZone.onUnstable.subscribe({\n            next: () => {\n                this._didWork = true;\n                this._isZoneStable = false;\n            }\n        });\n        this._ngZone.runOutsideAngular(() => {\n            this._ngZone.onStable.subscribe({\n                next: () => {\n                    NgZone.assertNotInAngularZone();\n                    scheduleMicroTask(() => {\n                        this._isZoneStable = true;\n                        this._runCallbacksIfReady();\n                    });\n                }\n            });\n        });\n    }\n    /**\n     * Increases the number of pending request\n     * @deprecated pending requests are now tracked with zones.\n     */\n    increasePendingRequestCount() {\n        this._pendingCount += 1;\n        this._didWork = true;\n        return this._pendingCount;\n    }\n    /**\n     * Decreases the number of pending request\n     * @deprecated pending requests are now tracked with zones\n     */\n    decreasePendingRequestCount() {\n        this._pendingCount -= 1;\n        if (this._pendingCount < 0) {\n            throw new Error('pending async requests below zero');\n        }\n        this._runCallbacksIfReady();\n        return this._pendingCount;\n    }\n    /**\n     * Whether an associated application is stable\n     */\n    isStable() {\n        return this._isZoneStable && this._pendingCount === 0 && !this._ngZone.hasPendingMacrotasks;\n    }\n    _runCallbacksIfReady() {\n        if (this.isStable()) {\n            // Schedules the call backs in a new frame so that it is always async.\n            scheduleMicroTask(() => {\n                while (this._callbacks.length !== 0) {\n                    let cb = this._callbacks.pop();\n                    clearTimeout(cb.timeoutId);\n                    cb.doneCb(this._didWork);\n                }\n                this._didWork = false;\n            });\n        }\n        else {\n            // Still not stable, send updates.\n            let pending = this.getPendingTasks();\n            this._callbacks = this._callbacks.filter((cb) => {\n                if (cb.updateCb && cb.updateCb(pending)) {\n                    clearTimeout(cb.timeoutId);\n                    return false;\n                }\n                return true;\n            });\n            this._didWork = true;\n        }\n    }\n    getPendingTasks() {\n        if (!this.taskTrackingZone) {\n            return [];\n        }\n        // Copy the tasks data so that we don't leak tasks.\n        return this.taskTrackingZone.macroTasks.map((t) => {\n            return {\n                source: t.source,\n                // From TaskTrackingZone:\n                // https://github.com/angular/zone.js/blob/master/lib/zone-spec/task-tracking.ts#L40\n                creationLocation: t.creationLocation,\n                data: t.data\n            };\n        });\n    }\n    addCallback(cb, timeout, updateCb) {\n        let timeoutId = -1;\n        if (timeout && timeout > 0) {\n            timeoutId = setTimeout(() => {\n                this._callbacks = this._callbacks.filter((cb) => cb.timeoutId !== timeoutId);\n                cb(this._didWork, this.getPendingTasks());\n            }, timeout);\n        }\n        this._callbacks.push({ doneCb: cb, timeoutId: timeoutId, updateCb: updateCb });\n    }\n    /**\n     * Wait for the application to be stable with a timeout. If the timeout is reached before that\n     * happens, the callback receives a list of the macro tasks that were pending, otherwise null.\n     *\n     * @param doneCb The callback to invoke when Angular is stable or the timeout expires\n     *    whichever comes first.\n     * @param timeout Optional. The maximum time to wait for Angular to become stable. If not\n     *    specified, whenStable() will wait forever.\n     * @param updateCb Optional. If specified, this callback will be invoked whenever the set of\n     *    pending macrotasks changes. If this callback returns true doneCb will not be invoked\n     *    and no further updates will be issued.\n     */\n    whenStable(doneCb, timeout, updateCb) {\n        if (updateCb && !this.taskTrackingZone) {\n            throw new Error('Task tracking zone is required when passing an update callback to ' +\n                'whenStable(). Is \"zone.js/dist/task-tracking.js\" loaded?');\n        }\n        // These arguments are 'Function' above to keep the public API simple.\n        this.addCallback(doneCb, timeout, updateCb);\n        this._runCallbacksIfReady();\n    }\n    /**\n     * Get the number of pending requests\n     * @deprecated pending requests are now tracked with zones\n     */\n    getPendingRequestCount() {\n        return this._pendingCount;\n    }\n    /**\n     * Find providers by name\n     * @param using The root element to search from\n     * @param provider The name of binding variable\n     * @param exactMatch Whether using exactMatch\n     */\n    findProviders(using, provider, exactMatch) {\n        // TODO(juliemr): implement.\n        return [];\n    }\n}\nTestability.ɵfac = function Testability_Factory(t) { return new (t || Testability)(ɵɵinject(NgZone)); };\nTestability.ɵprov = ɵɵdefineInjectable({ token: Testability, factory: Testability.ɵfac });\nTestability.ctorParameters = () => [\n    { type: NgZone }\n];\n/*@__PURE__*/ (function () { setClassMetadata(Testability, [{\n        type: Injectable\n    }], function () { return [{ type: NgZone }]; }, null); })();\n/**\n * A global registry of {@link Testability} instances for specific elements.\n * @publicApi\n */\nclass TestabilityRegistry {\n    constructor() {\n        /** @internal */\n        this._applications = new Map();\n        _testabilityGetter.addToWindow(this);\n    }\n    /**\n     * Registers an application with a testability hook so that it can be tracked\n     * @param token token of application, root element\n     * @param testability Testability hook\n     */\n    registerApplication(token, testability) {\n        this._applications.set(token, testability);\n    }\n    /**\n     * Unregisters an application.\n     * @param token token of application, root element\n     */\n    unregisterApplication(token) {\n        this._applications.delete(token);\n    }\n    /**\n     * Unregisters all applications\n     */\n    unregisterAllApplications() {\n        this._applications.clear();\n    }\n    /**\n     * Get a testability hook associated with the application\n     * @param elem root element\n     */\n    getTestability(elem) {\n        return this._applications.get(elem) || null;\n    }\n    /**\n     * Get all registered testabilities\n     */\n    getAllTestabilities() {\n        return Array.from(this._applications.values());\n    }\n    /**\n     * Get all registered applications(root elements)\n     */\n    getAllRootElements() {\n        return Array.from(this._applications.keys());\n    }\n    /**\n     * Find testability of a node in the Tree\n     * @param elem node\n     * @param findInAncestors whether finding testability in ancestors if testability was not found in\n     * current node\n     */\n    findTestabilityInTree(elem, findInAncestors = true) {\n        return _testabilityGetter.findTestabilityInTree(this, elem, findInAncestors);\n    }\n}\nTestabilityRegistry.ɵfac = function TestabilityRegistry_Factory(t) { return new (t || TestabilityRegistry)(); };\nTestabilityRegistry.ɵprov = ɵɵdefineInjectable({ token: TestabilityRegistry, factory: TestabilityRegistry.ɵfac });\nTestabilityRegistry.ctorParameters = () => [];\n/*@__PURE__*/ (function () { setClassMetadata(TestabilityRegistry, [{\n        type: Injectable\n    }], function () { return []; }, null); })();\nclass _NoopGetTestability {\n    addToWindow(registry) { }\n    findTestabilityInTree(registry, elem, findInAncestors) {\n        return null;\n    }\n}\n/**\n * Set the {@link GetTestability} implementation used by the Angular testing framework.\n * @publicApi\n */\nfunction setTestabilityGetter(getter) {\n    _testabilityGetter = getter;\n}\nlet _testabilityGetter = new _NoopGetTestability();\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nlet _platform;\nlet compileNgModuleFactory = compileNgModuleFactory__POST_R3__;\nfunction compileNgModuleFactory__PRE_R3__(injector, options, moduleType) {\n    const compilerFactory = injector.get(CompilerFactory);\n    const compiler = compilerFactory.createCompiler([options]);\n    return compiler.compileModuleAsync(moduleType);\n}\nfunction compileNgModuleFactory__POST_R3__(injector, options, moduleType) {\n    ngDevMode && assertNgModuleType(moduleType);\n    const moduleFactory = new NgModuleFactory$1(moduleType);\n    // All of the logic below is irrelevant for AOT-compiled code.\n    if (typeof ngJitMode !== 'undefined' && !ngJitMode) {\n        return Promise.resolve(moduleFactory);\n    }\n    const compilerOptions = injector.get(COMPILER_OPTIONS, []).concat(options);\n    // Configure the compiler to use the provided options. This call may fail when multiple modules\n    // are bootstrapped with incompatible options, as a component can only be compiled according to\n    // a single set of options.\n    setJitOptions({\n        defaultEncapsulation: _lastDefined(compilerOptions.map(opts => opts.defaultEncapsulation)),\n        preserveWhitespaces: _lastDefined(compilerOptions.map(opts => opts.preserveWhitespaces)),\n    });\n    if (isComponentResourceResolutionQueueEmpty()) {\n        return Promise.resolve(moduleFactory);\n    }\n    const compilerProviders = _mergeArrays(compilerOptions.map(o => o.providers));\n    // In case there are no compiler providers, we just return the module factory as\n    // there won't be any resource loader. This can happen with Ivy, because AOT compiled\n    // modules can be still passed through \"bootstrapModule\". In that case we shouldn't\n    // unnecessarily require the JIT compiler.\n    if (compilerProviders.length === 0) {\n        return Promise.resolve(moduleFactory);\n    }\n    const compiler = getCompilerFacade();\n    const compilerInjector = Injector.create({ providers: compilerProviders });\n    const resourceLoader = compilerInjector.get(compiler.ResourceLoader);\n    // The resource loader can also return a string while the \"resolveComponentResources\"\n    // always expects a promise. Therefore we need to wrap the returned value in a promise.\n    return resolveComponentResources(url => Promise.resolve(resourceLoader.get(url)))\n        .then(() => moduleFactory);\n}\n// the `window.ng` global utilities are only available in non-VE versions of\n// Angular. The function switch below will make sure that the code is not\n// included into Angular when PRE mode is active.\nfunction publishDefaultGlobalUtils__PRE_R3__() { }\nfunction publishDefaultGlobalUtils__POST_R3__() {\n    ngDevMode && publishDefaultGlobalUtils();\n}\nlet publishDefaultGlobalUtils$1 = publishDefaultGlobalUtils__POST_R3__;\nlet isBoundToModule = isBoundToModule__POST_R3__;\nfunction isBoundToModule__PRE_R3__(cf) {\n    return cf instanceof ComponentFactoryBoundToModule;\n}\nfunction isBoundToModule__POST_R3__(cf) {\n    return cf.isBoundToModule;\n}\nconst ALLOW_MULTIPLE_PLATFORMS = new InjectionToken('AllowMultipleToken');\n/**\n * A token for third-party components that can register themselves with NgProbe.\n *\n * @publicApi\n */\nclass NgProbeToken {\n    constructor(name, token) {\n        this.name = name;\n        this.token = token;\n    }\n}\n/**\n * Creates a platform.\n * Platforms must be created on launch using this function.\n *\n * @publicApi\n */\nfunction createPlatform(injector) {\n    if (_platform && !_platform.destroyed &&\n        !_platform.injector.get(ALLOW_MULTIPLE_PLATFORMS, false)) {\n        throw new Error('There can be only one platform. Destroy the previous one to create a new one.');\n    }\n    publishDefaultGlobalUtils$1();\n    _platform = injector.get(PlatformRef);\n    const inits = injector.get(PLATFORM_INITIALIZER, null);\n    if (inits)\n        inits.forEach((init) => init());\n    return _platform;\n}\n/**\n * Creates a factory for a platform. Can be used to provide or override `Providers` specific to\n * your applciation's runtime needs, such as `PLATFORM_INITIALIZER` and `PLATFORM_ID`.\n * @param parentPlatformFactory Another platform factory to modify. Allows you to compose factories\n * to build up configurations that might be required by different libraries or parts of the\n * application.\n * @param name Identifies the new platform factory.\n * @param providers A set of dependency providers for platforms created with the new factory.\n *\n * @publicApi\n */\nfunction createPlatformFactory(parentPlatformFactory, name, providers = []) {\n    const desc = `Platform: ${name}`;\n    const marker = new InjectionToken(desc);\n    return (extraProviders = []) => {\n        let platform = getPlatform();\n        if (!platform || platform.injector.get(ALLOW_MULTIPLE_PLATFORMS, false)) {\n            if (parentPlatformFactory) {\n                parentPlatformFactory(providers.concat(extraProviders).concat({ provide: marker, useValue: true }));\n            }\n            else {\n                const injectedProviders = providers.concat(extraProviders).concat({ provide: marker, useValue: true }, {\n                    provide: INJECTOR_SCOPE,\n                    useValue: 'platform'\n                });\n                createPlatform(Injector.create({ providers: injectedProviders, name: desc }));\n            }\n        }\n        return assertPlatform(marker);\n    };\n}\n/**\n * Checks that there is currently a platform that contains the given token as a provider.\n *\n * @publicApi\n */\nfunction assertPlatform(requiredToken) {\n    const platform = getPlatform();\n    if (!platform) {\n        throw new Error('No platform exists!');\n    }\n    if (!platform.injector.get(requiredToken, null)) {\n        throw new Error('A platform with a different configuration has been created. Please destroy it first.');\n    }\n    return platform;\n}\n/**\n * Destroys the current Angular platform and all Angular applications on the page.\n * Destroys all modules and listeners registered with the platform.\n *\n * @publicApi\n */\nfunction destroyPlatform() {\n    if (_platform && !_platform.destroyed) {\n        _platform.destroy();\n    }\n}\n/**\n * Returns the current platform.\n *\n * @publicApi\n */\nfunction getPlatform() {\n    return _platform && !_platform.destroyed ? _platform : null;\n}\n/**\n * The Angular platform is the entry point for Angular on a web page.\n * Each page has exactly one platform. Services (such as reflection) which are common\n * to every Angular application running on the page are bound in its scope.\n * A page's platform is initialized implicitly when a platform is created using a platform\n * factory such as `PlatformBrowser`, or explicitly by calling the `createPlatform()` function.\n *\n * @publicApi\n */\nclass PlatformRef {\n    /** @internal */\n    constructor(_injector) {\n        this._injector = _injector;\n        this._modules = [];\n        this._destroyListeners = [];\n        this._destroyed = false;\n    }\n    /**\n     * Creates an instance of an `@NgModule` for the given platform for offline compilation.\n     *\n     * @usageNotes\n     *\n     * The following example creates the NgModule for a browser platform.\n     *\n     * ```typescript\n     * my_module.ts:\n     *\n     * @NgModule({\n     *   imports: [BrowserModule]\n     * })\n     * class MyModule {}\n     *\n     * main.ts:\n     * import {MyModuleNgFactory} from './my_module.ngfactory';\n     * import {platformBrowser} from '@angular/platform-browser';\n     *\n     * let moduleRef = platformBrowser().bootstrapModuleFactory(MyModuleNgFactory);\n     * ```\n     */\n    bootstrapModuleFactory(moduleFactory, options) {\n        // Note: We need to create the NgZone _before_ we instantiate the module,\n        // as instantiating the module creates some providers eagerly.\n        // So we create a mini parent injector that just contains the new NgZone and\n        // pass that as parent to the NgModuleFactory.\n        const ngZoneOption = options ? options.ngZone : undefined;\n        const ngZoneEventCoalescing = (options && options.ngZoneEventCoalescing) || false;\n        const ngZone = getNgZone(ngZoneOption, ngZoneEventCoalescing);\n        const providers = [{ provide: NgZone, useValue: ngZone }];\n        // Attention: Don't use ApplicationRef.run here,\n        // as we want to be sure that all possible constructor calls are inside `ngZone.run`!\n        return ngZone.run(() => {\n            const ngZoneInjector = Injector.create({ providers: providers, parent: this.injector, name: moduleFactory.moduleType.name });\n            const moduleRef = moduleFactory.create(ngZoneInjector);\n            const exceptionHandler = moduleRef.injector.get(ErrorHandler, null);\n            if (!exceptionHandler) {\n                throw new Error('No ErrorHandler. Is platform module (BrowserModule) included?');\n            }\n            moduleRef.onDestroy(() => remove(this._modules, moduleRef));\n            ngZone.runOutsideAngular(() => ngZone.onError.subscribe({\n                next: (error) => {\n                    exceptionHandler.handleError(error);\n                }\n            }));\n            return _callAndReportToErrorHandler(exceptionHandler, ngZone, () => {\n                const initStatus = moduleRef.injector.get(ApplicationInitStatus);\n                initStatus.runInitializers();\n                return initStatus.donePromise.then(() => {\n                    if (ivyEnabled) {\n                        // If the `LOCALE_ID` provider is defined at bootstrap then we set the value for ivy\n                        const localeId = moduleRef.injector.get(LOCALE_ID$1, DEFAULT_LOCALE_ID);\n                        setLocaleId(localeId || DEFAULT_LOCALE_ID);\n                    }\n                    this._moduleDoBootstrap(moduleRef);\n                    return moduleRef;\n                });\n            });\n        });\n    }\n    /**\n     * Creates an instance of an `@NgModule` for a given platform using the given runtime compiler.\n     *\n     * @usageNotes\n     * ### Simple Example\n     *\n     * ```typescript\n     * @NgModule({\n     *   imports: [BrowserModule]\n     * })\n     * class MyModule {}\n     *\n     * let moduleRef = platformBrowser().bootstrapModule(MyModule);\n     * ```\n     *\n     */\n    bootstrapModule(moduleType, compilerOptions = []) {\n        const options = optionsReducer({}, compilerOptions);\n        return compileNgModuleFactory(this.injector, options, moduleType)\n            .then(moduleFactory => this.bootstrapModuleFactory(moduleFactory, options));\n    }\n    _moduleDoBootstrap(moduleRef) {\n        const appRef = moduleRef.injector.get(ApplicationRef);\n        if (moduleRef._bootstrapComponents.length > 0) {\n            moduleRef._bootstrapComponents.forEach(f => appRef.bootstrap(f));\n        }\n        else if (moduleRef.instance.ngDoBootstrap) {\n            moduleRef.instance.ngDoBootstrap(appRef);\n        }\n        else {\n            throw new Error(`The module ${stringify(moduleRef.instance\n                .constructor)} was bootstrapped, but it does not declare \"@NgModule.bootstrap\" components nor a \"ngDoBootstrap\" method. ` +\n                `Please define one of these.`);\n        }\n        this._modules.push(moduleRef);\n    }\n    /**\n     * Registers a listener to be called when the platform is destroyed.\n     */\n    onDestroy(callback) {\n        this._destroyListeners.push(callback);\n    }\n    /**\n     * Retrieves the platform {@link Injector}, which is the parent injector for\n     * every Angular application on the page and provides singleton providers.\n     */\n    get injector() {\n        return this._injector;\n    }\n    /**\n     * Destroys the current Angular platform and all Angular applications on the page.\n     * Destroys all modules and listeners registered with the platform.\n     */\n    destroy() {\n        if (this._destroyed) {\n            throw new Error('The platform has already been destroyed!');\n        }\n        this._modules.slice().forEach(module => module.destroy());\n        this._destroyListeners.forEach(listener => listener());\n        this._destroyed = true;\n    }\n    get destroyed() {\n        return this._destroyed;\n    }\n}\nPlatformRef.ɵfac = function PlatformRef_Factory(t) { return new (t || PlatformRef)(ɵɵinject(Injector)); };\nPlatformRef.ɵprov = ɵɵdefineInjectable({ token: PlatformRef, factory: PlatformRef.ɵfac });\nPlatformRef.ctorParameters = () => [\n    { type: Injector }\n];\n/*@__PURE__*/ (function () { setClassMetadata(PlatformRef, [{\n        type: Injectable\n    }], function () { return [{ type: Injector }]; }, null); })();\nfunction getNgZone(ngZoneOption, ngZoneEventCoalescing) {\n    let ngZone;\n    if (ngZoneOption === 'noop') {\n        ngZone = new NoopNgZone();\n    }\n    else {\n        ngZone = (ngZoneOption === 'zone.js' ? undefined : ngZoneOption) || new NgZone({\n            enableLongStackTrace: isDevMode(),\n            shouldCoalesceEventChangeDetection: ngZoneEventCoalescing\n        });\n    }\n    return ngZone;\n}\nfunction _callAndReportToErrorHandler(errorHandler, ngZone, callback) {\n    try {\n        const result = callback();\n        if (isPromise(result)) {\n            return result.catch((e) => {\n                ngZone.runOutsideAngular(() => errorHandler.handleError(e));\n                // rethrow as the exception handler might not do it\n                throw e;\n            });\n        }\n        return result;\n    }\n    catch (e) {\n        ngZone.runOutsideAngular(() => errorHandler.handleError(e));\n        // rethrow as the exception handler might not do it\n        throw e;\n    }\n}\nfunction optionsReducer(dst, objs) {\n    if (Array.isArray(objs)) {\n        dst = objs.reduce(optionsReducer, dst);\n    }\n    else {\n        dst = Object.assign(Object.assign({}, dst), objs);\n    }\n    return dst;\n}\n/**\n * A reference to an Angular application running on a page.\n *\n * @usageNotes\n *\n * {@a is-stable-examples}\n * ### isStable examples and caveats\n *\n * Note two important points about `isStable`, demonstrated in the examples below:\n * - the application will never be stable if you start any kind\n * of recurrent asynchronous task when the application starts\n * (for example for a polling process, started with a `setInterval`, a `setTimeout`\n * or using RxJS operators like `interval`);\n * - the `isStable` Observable runs outside of the Angular zone.\n *\n * Let's imagine that you start a recurrent task\n * (here incrementing a counter, using RxJS `interval`),\n * and at the same time subscribe to `isStable`.\n *\n * ```\n * constructor(appRef: ApplicationRef) {\n *   appRef.isStable.pipe(\n *      filter(stable => stable)\n *   ).subscribe(() => console.log('App is stable now');\n *   interval(1000).subscribe(counter => console.log(counter));\n * }\n * ```\n * In this example, `isStable` will never emit `true`,\n * and the trace \"App is stable now\" will never get logged.\n *\n * If you want to execute something when the app is stable,\n * you have to wait for the application to be stable\n * before starting your polling process.\n *\n * ```\n * constructor(appRef: ApplicationRef) {\n *   appRef.isStable.pipe(\n *     first(stable => stable),\n *     tap(stable => console.log('App is stable now')),\n *     switchMap(() => interval(1000))\n *   ).subscribe(counter => console.log(counter));\n * }\n * ```\n * In this example, the trace \"App is stable now\" will be logged\n * and then the counter starts incrementing every second.\n *\n * Note also that this Observable runs outside of the Angular zone,\n * which means that the code in the subscription\n * to this Observable will not trigger the change detection.\n *\n * Let's imagine that instead of logging the counter value,\n * you update a field of your component\n * and display it in its template.\n *\n * ```\n * constructor(appRef: ApplicationRef) {\n *   appRef.isStable.pipe(\n *     first(stable => stable),\n *     switchMap(() => interval(1000))\n *   ).subscribe(counter => this.value = counter);\n * }\n * ```\n * As the `isStable` Observable runs outside the zone,\n * the `value` field will be updated properly,\n * but the template will not be refreshed!\n *\n * You'll have to manually trigger the change detection to update the template.\n *\n * ```\n * constructor(appRef: ApplicationRef, cd: ChangeDetectorRef) {\n *   appRef.isStable.pipe(\n *     first(stable => stable),\n *     switchMap(() => interval(1000))\n *   ).subscribe(counter => {\n *     this.value = counter;\n *     cd.detectChanges();\n *   });\n * }\n * ```\n *\n * Or make the subscription callback run inside the zone.\n *\n * ```\n * constructor(appRef: ApplicationRef, zone: NgZone) {\n *   appRef.isStable.pipe(\n *     first(stable => stable),\n *     switchMap(() => interval(1000))\n *   ).subscribe(counter => zone.run(() => this.value = counter));\n * }\n * ```\n *\n * @publicApi\n */\nclass ApplicationRef {\n    /** @internal */\n    constructor(_zone, _console, _injector, _exceptionHandler, _componentFactoryResolver, _initStatus) {\n        this._zone = _zone;\n        this._console = _console;\n        this._injector = _injector;\n        this._exceptionHandler = _exceptionHandler;\n        this._componentFactoryResolver = _componentFactoryResolver;\n        this._initStatus = _initStatus;\n        /** @internal */\n        this._bootstrapListeners = [];\n        this._views = [];\n        this._runningTick = false;\n        this._enforceNoNewChanges = false;\n        this._stable = true;\n        /**\n         * Get a list of component types registered to this application.\n         * This list is populated even before the component is created.\n         */\n        this.componentTypes = [];\n        /**\n         * Get a list of components registered to this application.\n         */\n        this.components = [];\n        this._enforceNoNewChanges = isDevMode();\n        this._zone.onMicrotaskEmpty.subscribe({\n            next: () => {\n                this._zone.run(() => {\n                    this.tick();\n                });\n            }\n        });\n        const isCurrentlyStable = new Observable((observer) => {\n            this._stable = this._zone.isStable && !this._zone.hasPendingMacrotasks &&\n                !this._zone.hasPendingMicrotasks;\n            this._zone.runOutsideAngular(() => {\n                observer.next(this._stable);\n                observer.complete();\n            });\n        });\n        const isStable = new Observable((observer) => {\n            // Create the subscription to onStable outside the Angular Zone so that\n            // the callback is run outside the Angular Zone.\n            let stableSub;\n            this._zone.runOutsideAngular(() => {\n                stableSub = this._zone.onStable.subscribe(() => {\n                    NgZone.assertNotInAngularZone();\n                    // Check whether there are no pending macro/micro tasks in the next tick\n                    // to allow for NgZone to update the state.\n                    scheduleMicroTask(() => {\n                        if (!this._stable && !this._zone.hasPendingMacrotasks &&\n                            !this._zone.hasPendingMicrotasks) {\n                            this._stable = true;\n                            observer.next(true);\n                        }\n                    });\n                });\n            });\n            const unstableSub = this._zone.onUnstable.subscribe(() => {\n                NgZone.assertInAngularZone();\n                if (this._stable) {\n                    this._stable = false;\n                    this._zone.runOutsideAngular(() => {\n                        observer.next(false);\n                    });\n                }\n            });\n            return () => {\n                stableSub.unsubscribe();\n                unstableSub.unsubscribe();\n            };\n        });\n        this.isStable =\n            merge$1(isCurrentlyStable, isStable.pipe(share()));\n    }\n    /**\n     * Bootstrap a new component at the root level of the application.\n     *\n     * @usageNotes\n     * ### Bootstrap process\n     *\n     * When bootstrapping a new root component into an application, Angular mounts the\n     * specified application component onto DOM elements identified by the componentType's\n     * selector and kicks off automatic change detection to finish initializing the component.\n     *\n     * Optionally, a component can be mounted onto a DOM element that does not match the\n     * componentType's selector.\n     *\n     * ### Example\n     * {@example core/ts/platform/platform.ts region='longform'}\n     */\n    bootstrap(componentOrFactory, rootSelectorOrNode) {\n        if (!this._initStatus.done) {\n            throw new Error('Cannot bootstrap as there are still asynchronous initializers running. Bootstrap components in the `ngDoBootstrap` method of the root module.');\n        }\n        let componentFactory;\n        if (componentOrFactory instanceof ComponentFactory) {\n            componentFactory = componentOrFactory;\n        }\n        else {\n            componentFactory =\n                this._componentFactoryResolver.resolveComponentFactory(componentOrFactory);\n        }\n        this.componentTypes.push(componentFactory.componentType);\n        // Create a factory associated with the current module if it's not bound to some other\n        const ngModule = isBoundToModule(componentFactory) ? undefined : this._injector.get(NgModuleRef);\n        const selectorOrNode = rootSelectorOrNode || componentFactory.selector;\n        const compRef = componentFactory.create(Injector.NULL, [], selectorOrNode, ngModule);\n        compRef.onDestroy(() => {\n            this._unloadComponent(compRef);\n        });\n        const testability = compRef.injector.get(Testability, null);\n        if (testability) {\n            compRef.injector.get(TestabilityRegistry)\n                .registerApplication(compRef.location.nativeElement, testability);\n        }\n        this._loadComponent(compRef);\n        if (isDevMode()) {\n            this._console.log(`Angular is running in development mode. Call enableProdMode() to enable production mode.`);\n        }\n        return compRef;\n    }\n    /**\n     * Invoke this method to explicitly process change detection and its side-effects.\n     *\n     * In development mode, `tick()` also performs a second change detection cycle to ensure that no\n     * further changes are detected. If additional changes are picked up during this second cycle,\n     * bindings in the app have side-effects that cannot be resolved in a single change detection\n     * pass.\n     * In this case, Angular throws an error, since an Angular application can only have one change\n     * detection pass during which all change detection must complete.\n     */\n    tick() {\n        if (this._runningTick) {\n            throw new Error('ApplicationRef.tick is called recursively');\n        }\n        try {\n            this._runningTick = true;\n            for (let view of this._views) {\n                view.detectChanges();\n            }\n            if (this._enforceNoNewChanges) {\n                for (let view of this._views) {\n                    view.checkNoChanges();\n                }\n            }\n        }\n        catch (e) {\n            // Attention: Don't rethrow as it could cancel subscriptions to Observables!\n            this._zone.runOutsideAngular(() => this._exceptionHandler.handleError(e));\n        }\n        finally {\n            this._runningTick = false;\n        }\n    }\n    /**\n     * Attaches a view so that it will be dirty checked.\n     * The view will be automatically detached when it is destroyed.\n     * This will throw if the view is already attached to a ViewContainer.\n     */\n    attachView(viewRef) {\n        const view = viewRef;\n        this._views.push(view);\n        view.attachToAppRef(this);\n    }\n    /**\n     * Detaches a view from dirty checking again.\n     */\n    detachView(viewRef) {\n        const view = viewRef;\n        remove(this._views, view);\n        view.detachFromAppRef();\n    }\n    _loadComponent(componentRef) {\n        this.attachView(componentRef.hostView);\n        this.tick();\n        this.components.push(componentRef);\n        // Get the listeners lazily to prevent DI cycles.\n        const listeners = this._injector.get(APP_BOOTSTRAP_LISTENER, []).concat(this._bootstrapListeners);\n        listeners.forEach((listener) => listener(componentRef));\n    }\n    _unloadComponent(componentRef) {\n        this.detachView(componentRef.hostView);\n        remove(this.components, componentRef);\n    }\n    /** @internal */\n    ngOnDestroy() {\n        // TODO(alxhub): Dispose of the NgZone.\n        this._views.slice().forEach((view) => view.destroy());\n    }\n    /**\n     * Returns the number of attached views.\n     */\n    get viewCount() {\n        return this._views.length;\n    }\n}\nApplicationRef.ɵfac = function ApplicationRef_Factory(t) { return new (t || ApplicationRef)(ɵɵinject(NgZone), ɵɵinject(Console), ɵɵinject(Injector), ɵɵinject(ErrorHandler), ɵɵinject(ComponentFactoryResolver), ɵɵinject(ApplicationInitStatus)); };\nApplicationRef.ɵprov = ɵɵdefineInjectable({ token: ApplicationRef, factory: ApplicationRef.ɵfac });\nApplicationRef.ctorParameters = () => [\n    { type: NgZone },\n    { type: Console },\n    { type: Injector },\n    { type: ErrorHandler },\n    { type: ComponentFactoryResolver },\n    { type: ApplicationInitStatus }\n];\n/*@__PURE__*/ (function () { setClassMetadata(ApplicationRef, [{\n        type: Injectable\n    }], function () { return [{ type: NgZone }, { type: Console }, { type: Injector }, { type: ErrorHandler }, { type: ComponentFactoryResolver }, { type: ApplicationInitStatus }]; }, null); })();\nfunction remove(list, el) {\n    const index = list.indexOf(el);\n    if (index > -1) {\n        list.splice(index, 1);\n    }\n}\nfunction _lastDefined(args) {\n    for (let i = args.length - 1; i >= 0; i--) {\n        if (args[i] !== undefined) {\n            return args[i];\n        }\n    }\n    return undefined;\n}\nfunction _mergeArrays(parts) {\n    const result = [];\n    parts.forEach((part) => part && result.push(...part));\n    return result;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Used to load ng module factories.\n *\n * @publicApi\n * @deprecated the `string` form of `loadChildren` is deprecated, and `NgModuleFactoryLoader` is\n * part of its implementation. See `LoadChildren` for more details.\n */\nclass NgModuleFactoryLoader {\n}\nfunction getModuleFactory__PRE_R3__(id) {\n    const factory = getRegisteredNgModuleType(id);\n    if (!factory)\n        throw noModuleError(id);\n    return factory;\n}\nfunction getModuleFactory__POST_R3__(id) {\n    const type = getRegisteredNgModuleType(id);\n    if (!type)\n        throw noModuleError(id);\n    return new NgModuleFactory$1(type);\n}\n/**\n * Returns the NgModuleFactory with the given id, if it exists and has been loaded.\n * Factories for modules that do not specify an `id` cannot be retrieved. Throws if the module\n * cannot be found.\n * @publicApi\n */\nconst getModuleFactory = getModuleFactory__POST_R3__;\nfunction noModuleError(id) {\n    return new Error(`No module with ID ${id} loaded`);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst _SEPARATOR = '#';\nconst FACTORY_CLASS_SUFFIX = 'NgFactory';\n/**\n * Configuration for SystemJsNgModuleLoader.\n * token.\n *\n * @publicApi\n * @deprecated the `string` form of `loadChildren` is deprecated, and `SystemJsNgModuleLoaderConfig`\n * is part of its implementation. See `LoadChildren` for more details.\n */\nclass SystemJsNgModuleLoaderConfig {\n}\nconst DEFAULT_CONFIG = {\n    factoryPathPrefix: '',\n    factoryPathSuffix: '.ngfactory',\n};\n/**\n * NgModuleFactoryLoader that uses SystemJS to load NgModuleFactory\n * @publicApi\n * @deprecated the `string` form of `loadChildren` is deprecated, and `SystemJsNgModuleLoader` is\n * part of its implementation. See `LoadChildren` for more details.\n */\nclass SystemJsNgModuleLoader {\n    constructor(_compiler, config) {\n        this._compiler = _compiler;\n        this._config = config || DEFAULT_CONFIG;\n    }\n    load(path) {\n        const legacyOfflineMode = !ivyEnabled && this._compiler instanceof Compiler;\n        return legacyOfflineMode ? this.loadFactory(path) : this.loadAndCompile(path);\n    }\n    loadAndCompile(path) {\n        let [module, exportName] = path.split(_SEPARATOR);\n        if (exportName === undefined) {\n            exportName = 'default';\n        }\n        return System.import(module)\n            .then((module) => module[exportName])\n            .then((type) => checkNotEmpty(type, module, exportName))\n            .then((type) => this._compiler.compileModuleAsync(type));\n    }\n    loadFactory(path) {\n        let [module, exportName] = path.split(_SEPARATOR);\n        let factoryClassSuffix = FACTORY_CLASS_SUFFIX;\n        if (exportName === undefined) {\n            exportName = 'default';\n            factoryClassSuffix = '';\n        }\n        return System.import(this._config.factoryPathPrefix + module + this._config.factoryPathSuffix)\n            .then((module) => module[exportName + factoryClassSuffix])\n            .then((factory) => checkNotEmpty(factory, module, exportName));\n    }\n}\nSystemJsNgModuleLoader.ɵfac = function SystemJsNgModuleLoader_Factory(t) { return new (t || SystemJsNgModuleLoader)(ɵɵinject(Compiler), ɵɵinject(SystemJsNgModuleLoaderConfig, 8)); };\nSystemJsNgModuleLoader.ɵprov = ɵɵdefineInjectable({ token: SystemJsNgModuleLoader, factory: SystemJsNgModuleLoader.ɵfac });\nSystemJsNgModuleLoader.ctorParameters = () => [\n    { type: Compiler },\n    { type: SystemJsNgModuleLoaderConfig, decorators: [{ type: Optional }] }\n];\n/*@__PURE__*/ (function () { setClassMetadata(SystemJsNgModuleLoader, [{\n        type: Injectable\n    }], function () { return [{ type: Compiler }, { type: SystemJsNgModuleLoaderConfig, decorators: [{\n                type: Optional\n            }] }]; }, null); })();\nfunction checkNotEmpty(value, modulePath, exportName) {\n    if (!value) {\n        throw new Error(`Cannot find '${exportName}' in '${modulePath}'`);\n    }\n    return value;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Represents an Angular [view](guide/glossary#view \"Definition\").\n *\n * @see {@link ChangeDetectorRef#usage-notes Change detection usage}\n *\n * @publicApi\n */\nclass ViewRef$1 extends ChangeDetectorRef {\n}\n/**\n * Represents an Angular [view](guide/glossary#view) in a view container.\n * An [embedded view](guide/glossary#view-tree) can be referenced from a component\n * other than the hosting component whose template defines it, or it can be defined\n * independently by a `TemplateRef`.\n *\n * Properties of elements in a view can change, but the structure (number and order) of elements in\n * a view cannot. Change the structure of elements by inserting, moving, or\n * removing nested views in a view container.\n *\n * @see `ViewContainerRef`\n *\n * @usageNotes\n *\n * The following template breaks down into two separate `TemplateRef` instances,\n * an outer one and an inner one.\n *\n * ```\n * Count: {{items.length}}\n * <ul>\n *   <li *ngFor=\"let  item of items\">{{item}}</li>\n * </ul>\n * ```\n *\n * This is the outer `TemplateRef`:\n *\n * ```\n * Count: {{items.length}}\n * <ul>\n *   <ng-template ngFor let-item [ngForOf]=\"items\"></ng-template>\n * </ul>\n * ```\n *\n * This is the inner `TemplateRef`:\n *\n * ```\n *   <li>{{item}}</li>\n * ```\n *\n * The outer and inner `TemplateRef` instances are assembled into views as follows:\n *\n * ```\n * <!-- ViewRef: outer-0 -->\n * Count: 2\n * <ul>\n *   <ng-template view-container-ref></ng-template>\n *   <!-- ViewRef: inner-1 --><li>first</li><!-- /ViewRef: inner-1 -->\n *   <!-- ViewRef: inner-2 --><li>second</li><!-- /ViewRef: inner-2 -->\n * </ul>\n * <!-- /ViewRef: outer-0 -->\n * ```\n * @publicApi\n */\nclass EmbeddedViewRef extends ViewRef$1 {\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * @publicApi\n */\nclass DebugEventListener {\n    constructor(name, callback) {\n        this.name = name;\n        this.callback = callback;\n    }\n}\nclass DebugNode__PRE_R3__ {\n    constructor(nativeNode, parent, _debugContext) {\n        this.listeners = [];\n        this.parent = null;\n        this._debugContext = _debugContext;\n        this.nativeNode = nativeNode;\n        if (parent && parent instanceof DebugElement__PRE_R3__) {\n            parent.addChild(this);\n        }\n    }\n    get injector() {\n        return this._debugContext.injector;\n    }\n    get componentInstance() {\n        return this._debugContext.component;\n    }\n    get context() {\n        return this._debugContext.context;\n    }\n    get references() {\n        return this._debugContext.references;\n    }\n    get providerTokens() {\n        return this._debugContext.providerTokens;\n    }\n}\nclass DebugElement__PRE_R3__ extends DebugNode__PRE_R3__ {\n    constructor(nativeNode, parent, _debugContext) {\n        super(nativeNode, parent, _debugContext);\n        this.properties = {};\n        this.attributes = {};\n        this.classes = {};\n        this.styles = {};\n        this.childNodes = [];\n        this.nativeElement = nativeNode;\n    }\n    addChild(child) {\n        if (child) {\n            this.childNodes.push(child);\n            child.parent = this;\n        }\n    }\n    removeChild(child) {\n        const childIndex = this.childNodes.indexOf(child);\n        if (childIndex !== -1) {\n            child.parent = null;\n            this.childNodes.splice(childIndex, 1);\n        }\n    }\n    insertChildrenAfter(child, newChildren) {\n        const siblingIndex = this.childNodes.indexOf(child);\n        if (siblingIndex !== -1) {\n            this.childNodes.splice(siblingIndex + 1, 0, ...newChildren);\n            newChildren.forEach(c => {\n                if (c.parent) {\n                    c.parent.removeChild(c);\n                }\n                child.parent = this;\n            });\n        }\n    }\n    insertBefore(refChild, newChild) {\n        const refIndex = this.childNodes.indexOf(refChild);\n        if (refIndex === -1) {\n            this.addChild(newChild);\n        }\n        else {\n            if (newChild.parent) {\n                newChild.parent.removeChild(newChild);\n            }\n            newChild.parent = this;\n            this.childNodes.splice(refIndex, 0, newChild);\n        }\n    }\n    query(predicate) {\n        const results = this.queryAll(predicate);\n        return results[0] || null;\n    }\n    queryAll(predicate) {\n        const matches = [];\n        _queryElementChildren(this, predicate, matches);\n        return matches;\n    }\n    queryAllNodes(predicate) {\n        const matches = [];\n        _queryNodeChildren(this, predicate, matches);\n        return matches;\n    }\n    get children() {\n        return this.childNodes //\n            .filter((node) => node instanceof DebugElement__PRE_R3__);\n    }\n    triggerEventHandler(eventName, eventObj) {\n        this.listeners.forEach((listener) => {\n            if (listener.name == eventName) {\n                listener.callback(eventObj);\n            }\n        });\n    }\n}\n/**\n * @publicApi\n */\nfunction asNativeElements(debugEls) {\n    return debugEls.map((el) => el.nativeElement);\n}\nfunction _queryElementChildren(element, predicate, matches) {\n    element.childNodes.forEach(node => {\n        if (node instanceof DebugElement__PRE_R3__) {\n            if (predicate(node)) {\n                matches.push(node);\n            }\n            _queryElementChildren(node, predicate, matches);\n        }\n    });\n}\nfunction _queryNodeChildren(parentNode, predicate, matches) {\n    if (parentNode instanceof DebugElement__PRE_R3__) {\n        parentNode.childNodes.forEach(node => {\n            if (predicate(node)) {\n                matches.push(node);\n            }\n            if (node instanceof DebugElement__PRE_R3__) {\n                _queryNodeChildren(node, predicate, matches);\n            }\n        });\n    }\n}\nclass DebugNode__POST_R3__ {\n    constructor(nativeNode) {\n        this.nativeNode = nativeNode;\n    }\n    get parent() {\n        const parent = this.nativeNode.parentNode;\n        return parent ? new DebugElement__POST_R3__(parent) : null;\n    }\n    get injector() {\n        return getInjector(this.nativeNode);\n    }\n    get componentInstance() {\n        const nativeElement = this.nativeNode;\n        return nativeElement &&\n            (getComponent(nativeElement) || getOwningComponent(nativeElement));\n    }\n    get context() {\n        return getComponent(this.nativeNode) || getContext(this.nativeNode);\n    }\n    get listeners() {\n        return getListeners(this.nativeNode).filter(listener => listener.type === 'dom');\n    }\n    get references() {\n        return getLocalRefs(this.nativeNode);\n    }\n    get providerTokens() {\n        return getInjectionTokens(this.nativeNode);\n    }\n}\nclass DebugElement__POST_R3__ extends DebugNode__POST_R3__ {\n    constructor(nativeNode) {\n        ngDevMode && assertDomNode(nativeNode);\n        super(nativeNode);\n    }\n    get nativeElement() {\n        return this.nativeNode.nodeType == Node.ELEMENT_NODE ? this.nativeNode : null;\n    }\n    get name() {\n        try {\n            const context = loadLContext(this.nativeNode);\n            const lView = context.lView;\n            const tData = lView[TVIEW].data;\n            const tNode = tData[context.nodeIndex];\n            return tNode.tagName;\n        }\n        catch (e) {\n            return this.nativeNode.nodeName;\n        }\n    }\n    /**\n     *  Gets a map of property names to property values for an element.\n     *\n     *  This map includes:\n     *  - Regular property bindings (e.g. `[id]=\"id\"`)\n     *  - Host property bindings (e.g. `host: { '[id]': \"id\" }`)\n     *  - Interpolated property bindings (e.g. `id=\"{{ value }}\")\n     *\n     *  It does not include:\n     *  - input property bindings (e.g. `[myCustomInput]=\"value\"`)\n     *  - attribute bindings (e.g. `[attr.role]=\"menu\"`)\n     */\n    get properties() {\n        const context = loadLContext(this.nativeNode, false);\n        if (context == null) {\n            return {};\n        }\n        const lView = context.lView;\n        const tData = lView[TVIEW].data;\n        const tNode = tData[context.nodeIndex];\n        const properties = {};\n        // Collect properties from the DOM.\n        copyDomProperties(this.nativeElement, properties);\n        // Collect properties from the bindings. This is needed for animation renderer which has\n        // synthetic properties which don't get reflected into the DOM.\n        collectPropertyBindings(properties, tNode, lView, tData);\n        return properties;\n    }\n    get attributes() {\n        const attributes = {};\n        const element = this.nativeElement;\n        if (!element) {\n            return attributes;\n        }\n        const context = loadLContext(element, false);\n        if (context == null) {\n            return {};\n        }\n        const lView = context.lView;\n        const tNodeAttrs = lView[TVIEW].data[context.nodeIndex].attrs;\n        const lowercaseTNodeAttrs = [];\n        // For debug nodes we take the element's attribute directly from the DOM since it allows us\n        // to account for ones that weren't set via bindings (e.g. ViewEngine keeps track of the ones\n        // that are set through `Renderer2`). The problem is that the browser will lowercase all names,\n        // however since we have the attributes already on the TNode, we can preserve the case by going\n        // through them once, adding them to the `attributes` map and putting their lower-cased name\n        // into an array. Afterwards when we're going through the native DOM attributes, we can check\n        // whether we haven't run into an attribute already through the TNode.\n        if (tNodeAttrs) {\n            let i = 0;\n            while (i < tNodeAttrs.length) {\n                const attrName = tNodeAttrs[i];\n                // Stop as soon as we hit a marker. We only care about the regular attributes. Everything\n                // else will be handled below when we read the final attributes off the DOM.\n                if (typeof attrName !== 'string')\n                    break;\n                const attrValue = tNodeAttrs[i + 1];\n                attributes[attrName] = attrValue;\n                lowercaseTNodeAttrs.push(attrName.toLowerCase());\n                i += 2;\n            }\n        }\n        const eAttrs = element.attributes;\n        for (let i = 0; i < eAttrs.length; i++) {\n            const attr = eAttrs[i];\n            const lowercaseName = attr.name.toLowerCase();\n            // Make sure that we don't assign the same attribute both in its\n            // case-sensitive form and the lower-cased one from the browser.\n            if (lowercaseTNodeAttrs.indexOf(lowercaseName) === -1) {\n                // Save the lowercase name to align the behavior between browsers.\n                // IE preserves the case, while all other browser convert it to lower case.\n                attributes[lowercaseName] = attr.value;\n            }\n        }\n        return attributes;\n    }\n    get styles() {\n        if (this.nativeElement && this.nativeElement.style) {\n            return this.nativeElement.style;\n        }\n        return {};\n    }\n    get classes() {\n        const result = {};\n        const element = this.nativeElement;\n        // SVG elements return an `SVGAnimatedString` instead of a plain string for the `className`.\n        const className = element.className;\n        const classes = className && typeof className !== 'string' ? className.baseVal.split(' ') :\n            className.split(' ');\n        classes.forEach((value) => result[value] = true);\n        return result;\n    }\n    get childNodes() {\n        const childNodes = this.nativeNode.childNodes;\n        const children = [];\n        for (let i = 0; i < childNodes.length; i++) {\n            const element = childNodes[i];\n            children.push(getDebugNode__POST_R3__(element));\n        }\n        return children;\n    }\n    get children() {\n        const nativeElement = this.nativeElement;\n        if (!nativeElement)\n            return [];\n        const childNodes = nativeElement.children;\n        const children = [];\n        for (let i = 0; i < childNodes.length; i++) {\n            const element = childNodes[i];\n            children.push(getDebugNode__POST_R3__(element));\n        }\n        return children;\n    }\n    query(predicate) {\n        const results = this.queryAll(predicate);\n        return results[0] || null;\n    }\n    queryAll(predicate) {\n        const matches = [];\n        _queryAllR3(this, predicate, matches, true);\n        return matches;\n    }\n    queryAllNodes(predicate) {\n        const matches = [];\n        _queryAllR3(this, predicate, matches, false);\n        return matches;\n    }\n    triggerEventHandler(eventName, eventObj) {\n        const node = this.nativeNode;\n        const invokedListeners = [];\n        this.listeners.forEach(listener => {\n            if (listener.name === eventName) {\n                const callback = listener.callback;\n                callback.call(node, eventObj);\n                invokedListeners.push(callback);\n            }\n        });\n        // We need to check whether `eventListeners` exists, because it's something\n        // that Zone.js only adds to `EventTarget` in browser environments.\n        if (typeof node.eventListeners === 'function') {\n            // Note that in Ivy we wrap event listeners with a call to `event.preventDefault` in some\n            // cases. We use '__ngUnwrap__' as a special token that gives us access to the actual event\n            // listener.\n            node.eventListeners(eventName).forEach((listener) => {\n                // In order to ensure that we can detect the special __ngUnwrap__ token described above, we\n                // use `toString` on the listener and see if it contains the token. We use this approach to\n                // ensure that it still worked with compiled code since it cannot remove or rename string\n                // literals. We also considered using a special function name (i.e. if(listener.name ===\n                // special)) but that was more cumbersome and we were also concerned the compiled code could\n                // strip the name, turning the condition in to (\"\" === \"\") and always returning true.\n                if (listener.toString().indexOf('__ngUnwrap__') !== -1) {\n                    const unwrappedListener = listener('__ngUnwrap__');\n                    return invokedListeners.indexOf(unwrappedListener) === -1 &&\n                        unwrappedListener.call(node, eventObj);\n                }\n            });\n        }\n    }\n}\nfunction copyDomProperties(element, properties) {\n    if (element) {\n        // Skip own properties (as those are patched)\n        let obj = Object.getPrototypeOf(element);\n        const NodePrototype = Node.prototype;\n        while (obj !== null && obj !== NodePrototype) {\n            const descriptors = Object.getOwnPropertyDescriptors(obj);\n            for (let key in descriptors) {\n                if (!key.startsWith('__') && !key.startsWith('on')) {\n                    // don't include properties starting with `__` and `on`.\n                    // `__` are patched values which should not be included.\n                    // `on` are listeners which also should not be included.\n                    const value = element[key];\n                    if (isPrimitiveValue(value)) {\n                        properties[key] = value;\n                    }\n                }\n            }\n            obj = Object.getPrototypeOf(obj);\n        }\n    }\n}\nfunction isPrimitiveValue(value) {\n    return typeof value === 'string' || typeof value === 'boolean' || typeof value === 'number' ||\n        value === null;\n}\nfunction _queryAllR3(parentElement, predicate, matches, elementsOnly) {\n    const context = loadLContext(parentElement.nativeNode, false);\n    if (context !== null) {\n        const parentTNode = context.lView[TVIEW].data[context.nodeIndex];\n        _queryNodeChildrenR3(parentTNode, context.lView, predicate, matches, elementsOnly, parentElement.nativeNode);\n    }\n    else {\n        // If the context is null, then `parentElement` was either created with Renderer2 or native DOM\n        // APIs.\n        _queryNativeNodeDescendants(parentElement.nativeNode, predicate, matches, elementsOnly);\n    }\n}\n/**\n * Recursively match the current TNode against the predicate, and goes on with the next ones.\n *\n * @param tNode the current TNode\n * @param lView the LView of this TNode\n * @param predicate the predicate to match\n * @param matches the list of positive matches\n * @param elementsOnly whether only elements should be searched\n * @param rootNativeNode the root native node on which predicate should not be matched\n */\nfunction _queryNodeChildrenR3(tNode, lView, predicate, matches, elementsOnly, rootNativeNode) {\n    const nativeNode = getNativeByTNodeOrNull(tNode, lView);\n    // For each type of TNode, specific logic is executed.\n    if (tNode.type === 3 /* Element */ || tNode.type === 4 /* ElementContainer */) {\n        // Case 1: the TNode is an element\n        // The native node has to be checked.\n        _addQueryMatchR3(nativeNode, predicate, matches, elementsOnly, rootNativeNode);\n        if (isComponentHost(tNode)) {\n            // If the element is the host of a component, then all nodes in its view have to be processed.\n            // Note: the component's content (tNode.child) will be processed from the insertion points.\n            const componentView = getComponentLViewByIndex(tNode.index, lView);\n            if (componentView && componentView[TVIEW].firstChild) {\n                _queryNodeChildrenR3(componentView[TVIEW].firstChild, componentView, predicate, matches, elementsOnly, rootNativeNode);\n            }\n        }\n        else {\n            if (tNode.child) {\n                // Otherwise, its children have to be processed.\n                _queryNodeChildrenR3(tNode.child, lView, predicate, matches, elementsOnly, rootNativeNode);\n            }\n            // We also have to query the DOM directly in order to catch elements inserted through\n            // Renderer2. Note that this is __not__ optimal, because we're walking similar trees multiple\n            // times. ViewEngine could do it more efficiently, because all the insertions go through\n            // Renderer2, however that's not the case in Ivy. This approach is being used because:\n            // 1. Matching the ViewEngine behavior would mean potentially introducing a depedency\n            //    from `Renderer2` to Ivy which could bring Ivy code into ViewEngine.\n            // 2. We would have to make `Renderer3` \"know\" about debug nodes.\n            // 3. It allows us to capture nodes that were inserted directly via the DOM.\n            nativeNode && _queryNativeNodeDescendants(nativeNode, predicate, matches, elementsOnly);\n        }\n        // In all cases, if a dynamic container exists for this node, each view inside it has to be\n        // processed.\n        const nodeOrContainer = lView[tNode.index];\n        if (isLContainer(nodeOrContainer)) {\n            _queryNodeChildrenInContainerR3(nodeOrContainer, predicate, matches, elementsOnly, rootNativeNode);\n        }\n    }\n    else if (tNode.type === 0 /* Container */) {\n        // Case 2: the TNode is a container\n        // The native node has to be checked.\n        const lContainer = lView[tNode.index];\n        _addQueryMatchR3(lContainer[NATIVE], predicate, matches, elementsOnly, rootNativeNode);\n        // Each view inside the container has to be processed.\n        _queryNodeChildrenInContainerR3(lContainer, predicate, matches, elementsOnly, rootNativeNode);\n    }\n    else if (tNode.type === 1 /* Projection */) {\n        // Case 3: the TNode is a projection insertion point (i.e. a <ng-content>).\n        // The nodes projected at this location all need to be processed.\n        const componentView = lView[DECLARATION_COMPONENT_VIEW];\n        const componentHost = componentView[T_HOST];\n        const head = componentHost.projection[tNode.projection];\n        if (Array.isArray(head)) {\n            for (let nativeNode of head) {\n                _addQueryMatchR3(nativeNode, predicate, matches, elementsOnly, rootNativeNode);\n            }\n        }\n        else if (head) {\n            const nextLView = componentView[PARENT];\n            const nextTNode = nextLView[TVIEW].data[head.index];\n            _queryNodeChildrenR3(nextTNode, nextLView, predicate, matches, elementsOnly, rootNativeNode);\n        }\n    }\n    else if (tNode.child) {\n        // Case 4: the TNode is a view.\n        _queryNodeChildrenR3(tNode.child, lView, predicate, matches, elementsOnly, rootNativeNode);\n    }\n    // We don't want to go to the next sibling of the root node.\n    if (rootNativeNode !== nativeNode) {\n        // To determine the next node to be processed, we need to use the next or the projectionNext\n        // link, depending on whether the current node has been projected.\n        const nextTNode = (tNode.flags & 4 /* isProjected */) ? tNode.projectionNext : tNode.next;\n        if (nextTNode) {\n            _queryNodeChildrenR3(nextTNode, lView, predicate, matches, elementsOnly, rootNativeNode);\n        }\n    }\n}\n/**\n * Process all TNodes in a given container.\n *\n * @param lContainer the container to be processed\n * @param predicate the predicate to match\n * @param matches the list of positive matches\n * @param elementsOnly whether only elements should be searched\n * @param rootNativeNode the root native node on which predicate should not be matched\n */\nfunction _queryNodeChildrenInContainerR3(lContainer, predicate, matches, elementsOnly, rootNativeNode) {\n    for (let i = CONTAINER_HEADER_OFFSET; i < lContainer.length; i++) {\n        const childView = lContainer[i];\n        _queryNodeChildrenR3(childView[TVIEW].node, childView, predicate, matches, elementsOnly, rootNativeNode);\n    }\n}\n/**\n * Match the current native node against the predicate.\n *\n * @param nativeNode the current native node\n * @param predicate the predicate to match\n * @param matches the list of positive matches\n * @param elementsOnly whether only elements should be searched\n * @param rootNativeNode the root native node on which predicate should not be matched\n */\nfunction _addQueryMatchR3(nativeNode, predicate, matches, elementsOnly, rootNativeNode) {\n    if (rootNativeNode !== nativeNode) {\n        const debugNode = getDebugNode$1(nativeNode);\n        if (!debugNode) {\n            return;\n        }\n        // Type of the \"predicate and \"matches\" array are set based on the value of\n        // the \"elementsOnly\" parameter. TypeScript is not able to properly infer these\n        // types with generics, so we manually cast the parameters accordingly.\n        if (elementsOnly && debugNode instanceof DebugElement__POST_R3__ && predicate(debugNode) &&\n            matches.indexOf(debugNode) === -1) {\n            matches.push(debugNode);\n        }\n        else if (!elementsOnly && predicate(debugNode) &&\n            matches.indexOf(debugNode) === -1) {\n            matches.push(debugNode);\n        }\n    }\n}\n/**\n * Match all the descendants of a DOM node against a predicate.\n *\n * @param nativeNode the current native node\n * @param predicate the predicate to match\n * @param matches the list of positive matches\n * @param elementsOnly whether only elements should be searched\n */\nfunction _queryNativeNodeDescendants(parentNode, predicate, matches, elementsOnly) {\n    const nodes = parentNode.childNodes;\n    const length = nodes.length;\n    for (let i = 0; i < length; i++) {\n        const node = nodes[i];\n        const debugNode = getDebugNode$1(node);\n        if (debugNode) {\n            if (elementsOnly && debugNode instanceof DebugElement__POST_R3__ && predicate(debugNode) &&\n                matches.indexOf(debugNode) === -1) {\n                matches.push(debugNode);\n            }\n            else if (!elementsOnly && predicate(debugNode) &&\n                matches.indexOf(debugNode) === -1) {\n                matches.push(debugNode);\n            }\n            _queryNativeNodeDescendants(node, predicate, matches, elementsOnly);\n        }\n    }\n}\n/**\n * Iterates through the property bindings for a given node and generates\n * a map of property names to values. This map only contains property bindings\n * defined in templates, not in host bindings.\n */\nfunction collectPropertyBindings(properties, tNode, lView, tData) {\n    let bindingIndexes = tNode.propertyBindings;\n    if (bindingIndexes !== null) {\n        for (let i = 0; i < bindingIndexes.length; i++) {\n            const bindingIndex = bindingIndexes[i];\n            const propMetadata = tData[bindingIndex];\n            const metadataParts = propMetadata.split(INTERPOLATION_DELIMITER);\n            const propertyName = metadataParts[0];\n            if (metadataParts.length > 1) {\n                let value = metadataParts[1];\n                for (let j = 1; j < metadataParts.length - 1; j++) {\n                    value += renderStringify(lView[bindingIndex + j - 1]) + metadataParts[j + 1];\n                }\n                properties[propertyName] = value;\n            }\n            else {\n                properties[propertyName] = lView[bindingIndex];\n            }\n        }\n    }\n}\n// Need to keep the nodes in a global Map so that multiple angular apps are supported.\nconst _nativeNodeToDebugNode = new Map();\nfunction getDebugNode__PRE_R3__(nativeNode) {\n    return _nativeNodeToDebugNode.get(nativeNode) || null;\n}\nconst NG_DEBUG_PROPERTY = '__ng_debug__';\nfunction getDebugNode__POST_R3__(nativeNode) {\n    if (nativeNode instanceof Node) {\n        if (!(nativeNode.hasOwnProperty(NG_DEBUG_PROPERTY))) {\n            nativeNode[NG_DEBUG_PROPERTY] = nativeNode.nodeType == Node.ELEMENT_NODE ?\n                new DebugElement__POST_R3__(nativeNode) :\n                new DebugNode__POST_R3__(nativeNode);\n        }\n        return nativeNode[NG_DEBUG_PROPERTY];\n    }\n    return null;\n}\n/**\n * @publicApi\n */\nconst getDebugNode$1 = getDebugNode__POST_R3__;\nfunction getDebugNodeR2__PRE_R3__(nativeNode) {\n    return getDebugNode__PRE_R3__(nativeNode);\n}\nfunction getDebugNodeR2__POST_R3__(_nativeNode) {\n    return null;\n}\nconst getDebugNodeR2 = getDebugNodeR2__POST_R3__;\nfunction getAllDebugNodes() {\n    return Array.from(_nativeNodeToDebugNode.values());\n}\nfunction indexDebugNode(node) {\n    _nativeNodeToDebugNode.set(node.nativeNode, node);\n}\nfunction removeDebugNodeFromIndex(node) {\n    _nativeNodeToDebugNode.delete(node.nativeNode);\n}\n/**\n * @publicApi\n */\nconst DebugNode = DebugNode__POST_R3__;\n/**\n * @publicApi\n */\nconst DebugElement = DebugElement__POST_R3__;\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst _CORE_PLATFORM_PROVIDERS = [\n    // Set a default platform name for platforms that don't set it explicitly.\n    { provide: PLATFORM_ID, useValue: 'unknown' },\n    { provide: PlatformRef, deps: [Injector] },\n    { provide: TestabilityRegistry, deps: [] },\n    { provide: Console, deps: [] },\n];\n/**\n * This platform has to be included in any other platform\n *\n * @publicApi\n */\nconst platformCore = createPlatformFactory(null, 'core', _CORE_PLATFORM_PROVIDERS);\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction _iterableDiffersFactory() {\n    return defaultIterableDiffers;\n}\nfunction _keyValueDiffersFactory() {\n    return defaultKeyValueDiffers;\n}\nfunction _localeFactory(locale) {\n    locale = locale || getGlobalLocale();\n    if (ivyEnabled) {\n        setLocaleId(locale);\n    }\n    return locale;\n}\n/**\n * Work out the locale from the potential global properties.\n *\n * * Closure Compiler: use `goog.LOCALE`.\n * * Ivy enabled: use `$localize.locale`\n */\nfunction getGlobalLocale() {\n    if (typeof ngI18nClosureMode !== 'undefined' && ngI18nClosureMode &&\n        typeof goog !== 'undefined' && goog.LOCALE !== 'en') {\n        // * The default `goog.LOCALE` value is `en`, while Angular used `en-US`.\n        // * In order to preserve backwards compatibility, we use Angular default value over\n        //   Closure Compiler's one.\n        return goog.LOCALE;\n    }\n    else {\n        // KEEP `typeof $localize !== 'undefined' && $localize.locale` IN SYNC WITH THE LOCALIZE\n        // COMPILE-TIME INLINER.\n        //\n        // * During compile time inlining of translations the expression will be replaced\n        //   with a string literal that is the current locale. Other forms of this expression are not\n        //   guaranteed to be replaced.\n        //\n        // * During runtime translation evaluation, the developer is required to set `$localize.locale`\n        //   if required, or just to provide their own `LOCALE_ID` provider.\n        return (ivyEnabled && typeof $localize !== 'undefined' && $localize.locale) ||\n            DEFAULT_LOCALE_ID;\n    }\n}\nconst ɵ0$g = USD_CURRENCY_CODE;\n/**\n * A built-in [dependency injection token](guide/glossary#di-token)\n * that is used to configure the root injector for bootstrapping.\n */\nconst APPLICATION_MODULE_PROVIDERS = [\n    {\n        provide: ApplicationRef,\n        useClass: ApplicationRef,\n        deps: [NgZone, Console, Injector, ErrorHandler, ComponentFactoryResolver, ApplicationInitStatus]\n    },\n    { provide: SCHEDULER, deps: [NgZone], useFactory: zoneSchedulerFactory },\n    {\n        provide: ApplicationInitStatus,\n        useClass: ApplicationInitStatus,\n        deps: [[new Optional(), APP_INITIALIZER]]\n    },\n    { provide: Compiler, useClass: Compiler, deps: [] },\n    APP_ID_RANDOM_PROVIDER,\n    { provide: IterableDiffers, useFactory: _iterableDiffersFactory, deps: [] },\n    { provide: KeyValueDiffers, useFactory: _keyValueDiffersFactory, deps: [] },\n    {\n        provide: LOCALE_ID$1,\n        useFactory: _localeFactory,\n        deps: [[new Inject(LOCALE_ID$1), new Optional(), new SkipSelf()]]\n    },\n    { provide: DEFAULT_CURRENCY_CODE, useValue: ɵ0$g },\n];\n/**\n * Schedule work at next available slot.\n *\n * In Ivy this is just `requestAnimationFrame`. For compatibility reasons when bootstrapped\n * using `platformRef.bootstrap` we need to use `NgZone.onStable` as the scheduling mechanism.\n * This overrides the scheduling mechanism in Ivy to `NgZone.onStable`.\n *\n * @param ngZone NgZone to use for scheduling.\n */\nfunction zoneSchedulerFactory(ngZone) {\n    let queue = [];\n    ngZone.onStable.subscribe(() => {\n        while (queue.length) {\n            queue.pop()();\n        }\n    });\n    return function (fn) {\n        queue.push(fn);\n    };\n}\n/**\n * Configures the root injector for an app with\n * providers of `@angular/core` dependencies that `ApplicationRef` needs\n * to bootstrap components.\n *\n * Re-exported by `BrowserModule`, which is included automatically in the root\n * `AppModule` when you create a new app with the CLI `new` command.\n *\n * @publicApi\n */\nclass ApplicationModule {\n    // Inject ApplicationRef to make it eager...\n    constructor(appRef) { }\n}\nApplicationModule.ɵmod = ɵɵdefineNgModule({ type: ApplicationModule });\nApplicationModule.ɵinj = ɵɵdefineInjector({ factory: function ApplicationModule_Factory(t) { return new (t || ApplicationModule)(ɵɵinject(ApplicationRef)); }, providers: APPLICATION_MODULE_PROVIDERS });\nApplicationModule.ctorParameters = () => [\n    { type: ApplicationRef }\n];\n/*@__PURE__*/ (function () { setClassMetadata(ApplicationModule, [{\n        type: NgModule,\n        args: [{ providers: APPLICATION_MODULE_PROVIDERS }]\n    }], function () { return [{ type: ApplicationRef }]; }, null); })();\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction anchorDef(flags, matchedQueriesDsl, ngContentIndex, childCount, handleEvent, templateFactory) {\n    flags |= 1 /* TypeElement */;\n    const { matchedQueries, references, matchedQueryIds } = splitMatchedQueriesDsl(matchedQueriesDsl);\n    const template = templateFactory ? resolveDefinition(templateFactory) : null;\n    return {\n        // will bet set by the view definition\n        nodeIndex: -1,\n        parent: null,\n        renderParent: null,\n        bindingIndex: -1,\n        outputIndex: -1,\n        // regular values\n        flags,\n        checkIndex: -1,\n        childFlags: 0,\n        directChildFlags: 0,\n        childMatchedQueries: 0,\n        matchedQueries,\n        matchedQueryIds,\n        references,\n        ngContentIndex,\n        childCount,\n        bindings: [],\n        bindingFlags: 0,\n        outputs: [],\n        element: {\n            ns: null,\n            name: null,\n            attrs: null,\n            template,\n            componentProvider: null,\n            componentView: null,\n            componentRendererType: null,\n            publicProviders: null,\n            allProviders: null,\n            handleEvent: handleEvent || NOOP\n        },\n        provider: null,\n        text: null,\n        query: null,\n        ngContent: null\n    };\n}\nfunction elementDef(checkIndex, flags, matchedQueriesDsl, ngContentIndex, childCount, namespaceAndName, fixedAttrs = [], bindings, outputs, handleEvent, componentView, componentRendererType) {\n    if (!handleEvent) {\n        handleEvent = NOOP;\n    }\n    const { matchedQueries, references, matchedQueryIds } = splitMatchedQueriesDsl(matchedQueriesDsl);\n    let ns = null;\n    let name = null;\n    if (namespaceAndName) {\n        [ns, name] = splitNamespace(namespaceAndName);\n    }\n    bindings = bindings || [];\n    const bindingDefs = [];\n    for (let i = 0; i < bindings.length; i++) {\n        const [bindingFlags, namespaceAndName, suffixOrSecurityContext] = bindings[i];\n        const [ns, name] = splitNamespace(namespaceAndName);\n        let securityContext = undefined;\n        let suffix = undefined;\n        switch (bindingFlags & 15 /* Types */) {\n            case 4 /* TypeElementStyle */:\n                suffix = suffixOrSecurityContext;\n                break;\n            case 1 /* TypeElementAttribute */:\n            case 8 /* TypeProperty */:\n                securityContext = suffixOrSecurityContext;\n                break;\n        }\n        bindingDefs[i] =\n            { flags: bindingFlags, ns, name, nonMinifiedName: name, securityContext, suffix };\n    }\n    outputs = outputs || [];\n    const outputDefs = [];\n    for (let i = 0; i < outputs.length; i++) {\n        const [target, eventName] = outputs[i];\n        outputDefs[i] =\n            { type: 0 /* ElementOutput */, target: target, eventName, propName: null };\n    }\n    fixedAttrs = fixedAttrs || [];\n    const attrs = fixedAttrs.map(([namespaceAndName, value]) => {\n        const [ns, name] = splitNamespace(namespaceAndName);\n        return [ns, name, value];\n    });\n    componentRendererType = resolveRendererType2(componentRendererType);\n    if (componentView) {\n        flags |= 33554432 /* ComponentView */;\n    }\n    flags |= 1 /* TypeElement */;\n    return {\n        // will bet set by the view definition\n        nodeIndex: -1,\n        parent: null,\n        renderParent: null,\n        bindingIndex: -1,\n        outputIndex: -1,\n        // regular values\n        checkIndex,\n        flags,\n        childFlags: 0,\n        directChildFlags: 0,\n        childMatchedQueries: 0,\n        matchedQueries,\n        matchedQueryIds,\n        references,\n        ngContentIndex,\n        childCount,\n        bindings: bindingDefs,\n        bindingFlags: calcBindingFlags(bindingDefs),\n        outputs: outputDefs,\n        element: {\n            ns,\n            name,\n            attrs,\n            template: null,\n            // will bet set by the view definition\n            componentProvider: null,\n            componentView: componentView || null,\n            componentRendererType: componentRendererType,\n            publicProviders: null,\n            allProviders: null,\n            handleEvent: handleEvent || NOOP,\n        },\n        provider: null,\n        text: null,\n        query: null,\n        ngContent: null\n    };\n}\nfunction createElement(view, renderHost, def) {\n    const elDef = def.element;\n    const rootSelectorOrNode = view.root.selectorOrNode;\n    const renderer = view.renderer;\n    let el;\n    if (view.parent || !rootSelectorOrNode) {\n        if (elDef.name) {\n            el = renderer.createElement(elDef.name, elDef.ns);\n        }\n        else {\n            el = renderer.createComment('');\n        }\n        const parentEl = getParentRenderElement(view, renderHost, def);\n        if (parentEl) {\n            renderer.appendChild(parentEl, el);\n        }\n    }\n    else {\n        // when using native Shadow DOM, do not clear the root element contents to allow slot projection\n        const preserveContent = (!!elDef.componentRendererType &&\n            elDef.componentRendererType.encapsulation === ViewEncapsulation$1.ShadowDom);\n        el = renderer.selectRootElement(rootSelectorOrNode, preserveContent);\n    }\n    if (elDef.attrs) {\n        for (let i = 0; i < elDef.attrs.length; i++) {\n            const [ns, name, value] = elDef.attrs[i];\n            renderer.setAttribute(el, name, value, ns);\n        }\n    }\n    return el;\n}\nfunction listenToElementOutputs(view, compView, def, el) {\n    for (let i = 0; i < def.outputs.length; i++) {\n        const output = def.outputs[i];\n        const handleEventClosure = renderEventHandlerClosure(view, def.nodeIndex, elementEventFullName(output.target, output.eventName));\n        let listenTarget = output.target;\n        let listenerView = view;\n        if (output.target === 'component') {\n            listenTarget = null;\n            listenerView = compView;\n        }\n        const disposable = listenerView.renderer.listen(listenTarget || el, output.eventName, handleEventClosure);\n        view.disposables[def.outputIndex + i] = disposable;\n    }\n}\nfunction renderEventHandlerClosure(view, index, eventName) {\n    return (event) => dispatchEvent(view, index, eventName, event);\n}\nfunction checkAndUpdateElementInline(view, def, v0, v1, v2, v3, v4, v5, v6, v7, v8, v9) {\n    const bindLen = def.bindings.length;\n    let changed = false;\n    if (bindLen > 0 && checkAndUpdateElementValue(view, def, 0, v0))\n        changed = true;\n    if (bindLen > 1 && checkAndUpdateElementValue(view, def, 1, v1))\n        changed = true;\n    if (bindLen > 2 && checkAndUpdateElementValue(view, def, 2, v2))\n        changed = true;\n    if (bindLen > 3 && checkAndUpdateElementValue(view, def, 3, v3))\n        changed = true;\n    if (bindLen > 4 && checkAndUpdateElementValue(view, def, 4, v4))\n        changed = true;\n    if (bindLen > 5 && checkAndUpdateElementValue(view, def, 5, v5))\n        changed = true;\n    if (bindLen > 6 && checkAndUpdateElementValue(view, def, 6, v6))\n        changed = true;\n    if (bindLen > 7 && checkAndUpdateElementValue(view, def, 7, v7))\n        changed = true;\n    if (bindLen > 8 && checkAndUpdateElementValue(view, def, 8, v8))\n        changed = true;\n    if (bindLen > 9 && checkAndUpdateElementValue(view, def, 9, v9))\n        changed = true;\n    return changed;\n}\nfunction checkAndUpdateElementDynamic(view, def, values) {\n    let changed = false;\n    for (let i = 0; i < values.length; i++) {\n        if (checkAndUpdateElementValue(view, def, i, values[i]))\n            changed = true;\n    }\n    return changed;\n}\nfunction checkAndUpdateElementValue(view, def, bindingIdx, value) {\n    if (!checkAndUpdateBinding(view, def, bindingIdx, value)) {\n        return false;\n    }\n    const binding = def.bindings[bindingIdx];\n    const elData = asElementData(view, def.nodeIndex);\n    const renderNode = elData.renderElement;\n    const name = binding.name;\n    switch (binding.flags & 15 /* Types */) {\n        case 1 /* TypeElementAttribute */:\n            setElementAttribute(view, binding, renderNode, binding.ns, name, value);\n            break;\n        case 2 /* TypeElementClass */:\n            setElementClass(view, renderNode, name, value);\n            break;\n        case 4 /* TypeElementStyle */:\n            setElementStyle(view, binding, renderNode, name, value);\n            break;\n        case 8 /* TypeProperty */:\n            const bindView = (def.flags & 33554432 /* ComponentView */ &&\n                binding.flags & 32 /* SyntheticHostProperty */) ?\n                elData.componentView :\n                view;\n            setElementProperty(bindView, binding, renderNode, name, value);\n            break;\n    }\n    return true;\n}\nfunction setElementAttribute(view, binding, renderNode, ns, name, value) {\n    const securityContext = binding.securityContext;\n    let renderValue = securityContext ? view.root.sanitizer.sanitize(securityContext, value) : value;\n    renderValue = renderValue != null ? renderValue.toString() : null;\n    const renderer = view.renderer;\n    if (value != null) {\n        renderer.setAttribute(renderNode, name, renderValue, ns);\n    }\n    else {\n        renderer.removeAttribute(renderNode, name, ns);\n    }\n}\nfunction setElementClass(view, renderNode, name, value) {\n    const renderer = view.renderer;\n    if (value) {\n        renderer.addClass(renderNode, name);\n    }\n    else {\n        renderer.removeClass(renderNode, name);\n    }\n}\nfunction setElementStyle(view, binding, renderNode, name, value) {\n    let renderValue = view.root.sanitizer.sanitize(SecurityContext.STYLE, value);\n    if (renderValue != null) {\n        renderValue = renderValue.toString();\n        const unit = binding.suffix;\n        if (unit != null) {\n            renderValue = renderValue + unit;\n        }\n    }\n    else {\n        renderValue = null;\n    }\n    const renderer = view.renderer;\n    if (renderValue != null) {\n        renderer.setStyle(renderNode, name, renderValue);\n    }\n    else {\n        renderer.removeStyle(renderNode, name);\n    }\n}\nfunction setElementProperty(view, binding, renderNode, name, value) {\n    const securityContext = binding.securityContext;\n    let renderValue = securityContext ? view.root.sanitizer.sanitize(securityContext, value) : value;\n    view.renderer.setProperty(renderNode, name, renderValue);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction queryDef(flags, id, bindings) {\n    let bindingDefs = [];\n    for (let propName in bindings) {\n        const bindingType = bindings[propName];\n        bindingDefs.push({ propName, bindingType });\n    }\n    return {\n        // will bet set by the view definition\n        nodeIndex: -1,\n        parent: null,\n        renderParent: null,\n        bindingIndex: -1,\n        outputIndex: -1,\n        // regular values\n        // TODO(vicb): check\n        checkIndex: -1,\n        flags,\n        childFlags: 0,\n        directChildFlags: 0,\n        childMatchedQueries: 0,\n        ngContentIndex: -1,\n        matchedQueries: {},\n        matchedQueryIds: 0,\n        references: {},\n        childCount: 0,\n        bindings: [],\n        bindingFlags: 0,\n        outputs: [],\n        element: null,\n        provider: null,\n        text: null,\n        query: { id, filterId: filterQueryId(id), bindings: bindingDefs },\n        ngContent: null\n    };\n}\nfunction createQuery() {\n    return new QueryList();\n}\nfunction dirtyParentQueries(view) {\n    const queryIds = view.def.nodeMatchedQueries;\n    while (view.parent && isEmbeddedView(view)) {\n        let tplDef = view.parentNodeDef;\n        view = view.parent;\n        // content queries\n        const end = tplDef.nodeIndex + tplDef.childCount;\n        for (let i = 0; i <= end; i++) {\n            const nodeDef = view.def.nodes[i];\n            if ((nodeDef.flags & 67108864 /* TypeContentQuery */) &&\n                (nodeDef.flags & 536870912 /* DynamicQuery */) &&\n                (nodeDef.query.filterId & queryIds) === nodeDef.query.filterId) {\n                asQueryList(view, i).setDirty();\n            }\n            if ((nodeDef.flags & 1 /* TypeElement */ && i + nodeDef.childCount < tplDef.nodeIndex) ||\n                !(nodeDef.childFlags & 67108864 /* TypeContentQuery */) ||\n                !(nodeDef.childFlags & 536870912 /* DynamicQuery */)) {\n                // skip elements that don't contain the template element or no query.\n                i += nodeDef.childCount;\n            }\n        }\n    }\n    // view queries\n    if (view.def.nodeFlags & 134217728 /* TypeViewQuery */) {\n        for (let i = 0; i < view.def.nodes.length; i++) {\n            const nodeDef = view.def.nodes[i];\n            if ((nodeDef.flags & 134217728 /* TypeViewQuery */) && (nodeDef.flags & 536870912 /* DynamicQuery */)) {\n                asQueryList(view, i).setDirty();\n            }\n            // only visit the root nodes\n            i += nodeDef.childCount;\n        }\n    }\n}\nfunction checkAndUpdateQuery(view, nodeDef) {\n    const queryList = asQueryList(view, nodeDef.nodeIndex);\n    if (!queryList.dirty) {\n        return;\n    }\n    let directiveInstance;\n    let newValues = undefined;\n    if (nodeDef.flags & 67108864 /* TypeContentQuery */) {\n        const elementDef = nodeDef.parent.parent;\n        newValues = calcQueryValues(view, elementDef.nodeIndex, elementDef.nodeIndex + elementDef.childCount, nodeDef.query, []);\n        directiveInstance = asProviderData(view, nodeDef.parent.nodeIndex).instance;\n    }\n    else if (nodeDef.flags & 134217728 /* TypeViewQuery */) {\n        newValues = calcQueryValues(view, 0, view.def.nodes.length - 1, nodeDef.query, []);\n        directiveInstance = view.component;\n    }\n    queryList.reset(newValues);\n    const bindings = nodeDef.query.bindings;\n    let notify = false;\n    for (let i = 0; i < bindings.length; i++) {\n        const binding = bindings[i];\n        let boundValue;\n        switch (binding.bindingType) {\n            case 0 /* First */:\n                boundValue = queryList.first;\n                break;\n            case 1 /* All */:\n                boundValue = queryList;\n                notify = true;\n                break;\n        }\n        directiveInstance[binding.propName] = boundValue;\n    }\n    if (notify) {\n        queryList.notifyOnChanges();\n    }\n}\nfunction calcQueryValues(view, startIndex, endIndex, queryDef, values) {\n    for (let i = startIndex; i <= endIndex; i++) {\n        const nodeDef = view.def.nodes[i];\n        const valueType = nodeDef.matchedQueries[queryDef.id];\n        if (valueType != null) {\n            values.push(getQueryValue(view, nodeDef, valueType));\n        }\n        if (nodeDef.flags & 1 /* TypeElement */ && nodeDef.element.template &&\n            (nodeDef.element.template.nodeMatchedQueries & queryDef.filterId) ===\n                queryDef.filterId) {\n            const elementData = asElementData(view, i);\n            // check embedded views that were attached at the place of their template,\n            // but process child nodes first if some match the query (see issue #16568)\n            if ((nodeDef.childMatchedQueries & queryDef.filterId) === queryDef.filterId) {\n                calcQueryValues(view, i + 1, i + nodeDef.childCount, queryDef, values);\n                i += nodeDef.childCount;\n            }\n            if (nodeDef.flags & 16777216 /* EmbeddedViews */) {\n                const embeddedViews = elementData.viewContainer._embeddedViews;\n                for (let k = 0; k < embeddedViews.length; k++) {\n                    const embeddedView = embeddedViews[k];\n                    const dvc = declaredViewContainer(embeddedView);\n                    if (dvc && dvc === elementData) {\n                        calcQueryValues(embeddedView, 0, embeddedView.def.nodes.length - 1, queryDef, values);\n                    }\n                }\n            }\n            const projectedViews = elementData.template._projectedViews;\n            if (projectedViews) {\n                for (let k = 0; k < projectedViews.length; k++) {\n                    const projectedView = projectedViews[k];\n                    calcQueryValues(projectedView, 0, projectedView.def.nodes.length - 1, queryDef, values);\n                }\n            }\n        }\n        if ((nodeDef.childMatchedQueries & queryDef.filterId) !== queryDef.filterId) {\n            // if no child matches the query, skip the children.\n            i += nodeDef.childCount;\n        }\n    }\n    return values;\n}\nfunction getQueryValue(view, nodeDef, queryValueType) {\n    if (queryValueType != null) {\n        // a match\n        switch (queryValueType) {\n            case 1 /* RenderElement */:\n                return asElementData(view, nodeDef.nodeIndex).renderElement;\n            case 0 /* ElementRef */:\n                return new ElementRef(asElementData(view, nodeDef.nodeIndex).renderElement);\n            case 2 /* TemplateRef */:\n                return asElementData(view, nodeDef.nodeIndex).template;\n            case 3 /* ViewContainerRef */:\n                return asElementData(view, nodeDef.nodeIndex).viewContainer;\n            case 4 /* Provider */:\n                return asProviderData(view, nodeDef.nodeIndex).instance;\n        }\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction ngContentDef(ngContentIndex, index) {\n    return {\n        // will bet set by the view definition\n        nodeIndex: -1,\n        parent: null,\n        renderParent: null,\n        bindingIndex: -1,\n        outputIndex: -1,\n        // regular values\n        checkIndex: -1,\n        flags: 8 /* TypeNgContent */,\n        childFlags: 0,\n        directChildFlags: 0,\n        childMatchedQueries: 0,\n        matchedQueries: {},\n        matchedQueryIds: 0,\n        references: {},\n        ngContentIndex,\n        childCount: 0,\n        bindings: [],\n        bindingFlags: 0,\n        outputs: [],\n        element: null,\n        provider: null,\n        text: null,\n        query: null,\n        ngContent: { index }\n    };\n}\nfunction appendNgContent(view, renderHost, def) {\n    const parentEl = getParentRenderElement(view, renderHost, def);\n    if (!parentEl) {\n        // Nothing to do if there is no parent element.\n        return;\n    }\n    const ngContentIndex = def.ngContent.index;\n    visitProjectedRenderNodes(view, ngContentIndex, 1 /* AppendChild */, parentEl, null, undefined);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction purePipeDef(checkIndex, argCount) {\n    // argCount + 1 to include the pipe as first arg\n    return _pureExpressionDef(128 /* TypePurePipe */, checkIndex, newArray(argCount + 1));\n}\nfunction pureArrayDef(checkIndex, argCount) {\n    return _pureExpressionDef(32 /* TypePureArray */, checkIndex, newArray(argCount));\n}\nfunction pureObjectDef(checkIndex, propToIndex) {\n    const keys = Object.keys(propToIndex);\n    const nbKeys = keys.length;\n    const propertyNames = [];\n    for (let i = 0; i < nbKeys; i++) {\n        const key = keys[i];\n        const index = propToIndex[key];\n        propertyNames.push(key);\n    }\n    return _pureExpressionDef(64 /* TypePureObject */, checkIndex, propertyNames);\n}\nfunction _pureExpressionDef(flags, checkIndex, propertyNames) {\n    const bindings = [];\n    for (let i = 0; i < propertyNames.length; i++) {\n        const prop = propertyNames[i];\n        bindings.push({\n            flags: 8 /* TypeProperty */,\n            name: prop,\n            ns: null,\n            nonMinifiedName: prop,\n            securityContext: null,\n            suffix: null\n        });\n    }\n    return {\n        // will bet set by the view definition\n        nodeIndex: -1,\n        parent: null,\n        renderParent: null,\n        bindingIndex: -1,\n        outputIndex: -1,\n        // regular values\n        checkIndex,\n        flags,\n        childFlags: 0,\n        directChildFlags: 0,\n        childMatchedQueries: 0,\n        matchedQueries: {},\n        matchedQueryIds: 0,\n        references: {},\n        ngContentIndex: -1,\n        childCount: 0,\n        bindings,\n        bindingFlags: calcBindingFlags(bindings),\n        outputs: [],\n        element: null,\n        provider: null,\n        text: null,\n        query: null,\n        ngContent: null\n    };\n}\nfunction createPureExpression(view, def) {\n    return { value: undefined };\n}\nfunction checkAndUpdatePureExpressionInline(view, def, v0, v1, v2, v3, v4, v5, v6, v7, v8, v9) {\n    const bindings = def.bindings;\n    let changed = false;\n    const bindLen = bindings.length;\n    if (bindLen > 0 && checkAndUpdateBinding(view, def, 0, v0))\n        changed = true;\n    if (bindLen > 1 && checkAndUpdateBinding(view, def, 1, v1))\n        changed = true;\n    if (bindLen > 2 && checkAndUpdateBinding(view, def, 2, v2))\n        changed = true;\n    if (bindLen > 3 && checkAndUpdateBinding(view, def, 3, v3))\n        changed = true;\n    if (bindLen > 4 && checkAndUpdateBinding(view, def, 4, v4))\n        changed = true;\n    if (bindLen > 5 && checkAndUpdateBinding(view, def, 5, v5))\n        changed = true;\n    if (bindLen > 6 && checkAndUpdateBinding(view, def, 6, v6))\n        changed = true;\n    if (bindLen > 7 && checkAndUpdateBinding(view, def, 7, v7))\n        changed = true;\n    if (bindLen > 8 && checkAndUpdateBinding(view, def, 8, v8))\n        changed = true;\n    if (bindLen > 9 && checkAndUpdateBinding(view, def, 9, v9))\n        changed = true;\n    if (changed) {\n        const data = asPureExpressionData(view, def.nodeIndex);\n        let value;\n        switch (def.flags & 201347067 /* Types */) {\n            case 32 /* TypePureArray */:\n                value = [];\n                if (bindLen > 0)\n                    value.push(v0);\n                if (bindLen > 1)\n                    value.push(v1);\n                if (bindLen > 2)\n                    value.push(v2);\n                if (bindLen > 3)\n                    value.push(v3);\n                if (bindLen > 4)\n                    value.push(v4);\n                if (bindLen > 5)\n                    value.push(v5);\n                if (bindLen > 6)\n                    value.push(v6);\n                if (bindLen > 7)\n                    value.push(v7);\n                if (bindLen > 8)\n                    value.push(v8);\n                if (bindLen > 9)\n                    value.push(v9);\n                break;\n            case 64 /* TypePureObject */:\n                value = {};\n                if (bindLen > 0)\n                    value[bindings[0].name] = v0;\n                if (bindLen > 1)\n                    value[bindings[1].name] = v1;\n                if (bindLen > 2)\n                    value[bindings[2].name] = v2;\n                if (bindLen > 3)\n                    value[bindings[3].name] = v3;\n                if (bindLen > 4)\n                    value[bindings[4].name] = v4;\n                if (bindLen > 5)\n                    value[bindings[5].name] = v5;\n                if (bindLen > 6)\n                    value[bindings[6].name] = v6;\n                if (bindLen > 7)\n                    value[bindings[7].name] = v7;\n                if (bindLen > 8)\n                    value[bindings[8].name] = v8;\n                if (bindLen > 9)\n                    value[bindings[9].name] = v9;\n                break;\n            case 128 /* TypePurePipe */:\n                const pipe = v0;\n                switch (bindLen) {\n                    case 1:\n                        value = pipe.transform(v0);\n                        break;\n                    case 2:\n                        value = pipe.transform(v1);\n                        break;\n                    case 3:\n                        value = pipe.transform(v1, v2);\n                        break;\n                    case 4:\n                        value = pipe.transform(v1, v2, v3);\n                        break;\n                    case 5:\n                        value = pipe.transform(v1, v2, v3, v4);\n                        break;\n                    case 6:\n                        value = pipe.transform(v1, v2, v3, v4, v5);\n                        break;\n                    case 7:\n                        value = pipe.transform(v1, v2, v3, v4, v5, v6);\n                        break;\n                    case 8:\n                        value = pipe.transform(v1, v2, v3, v4, v5, v6, v7);\n                        break;\n                    case 9:\n                        value = pipe.transform(v1, v2, v3, v4, v5, v6, v7, v8);\n                        break;\n                    case 10:\n                        value = pipe.transform(v1, v2, v3, v4, v5, v6, v7, v8, v9);\n                        break;\n                }\n                break;\n        }\n        data.value = value;\n    }\n    return changed;\n}\nfunction checkAndUpdatePureExpressionDynamic(view, def, values) {\n    const bindings = def.bindings;\n    let changed = false;\n    for (let i = 0; i < values.length; i++) {\n        // Note: We need to loop over all values, so that\n        // the old values are updates as well!\n        if (checkAndUpdateBinding(view, def, i, values[i])) {\n            changed = true;\n        }\n    }\n    if (changed) {\n        const data = asPureExpressionData(view, def.nodeIndex);\n        let value;\n        switch (def.flags & 201347067 /* Types */) {\n            case 32 /* TypePureArray */:\n                value = values;\n                break;\n            case 64 /* TypePureObject */:\n                value = {};\n                for (let i = 0; i < values.length; i++) {\n                    value[bindings[i].name] = values[i];\n                }\n                break;\n            case 128 /* TypePurePipe */:\n                const pipe = values[0];\n                const params = values.slice(1);\n                value = pipe.transform(...params);\n                break;\n        }\n        data.value = value;\n    }\n    return changed;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction textDef(checkIndex, ngContentIndex, staticText) {\n    const bindings = [];\n    for (let i = 1; i < staticText.length; i++) {\n        bindings[i - 1] = {\n            flags: 8 /* TypeProperty */,\n            name: null,\n            ns: null,\n            nonMinifiedName: null,\n            securityContext: null,\n            suffix: staticText[i],\n        };\n    }\n    return {\n        // will bet set by the view definition\n        nodeIndex: -1,\n        parent: null,\n        renderParent: null,\n        bindingIndex: -1,\n        outputIndex: -1,\n        // regular values\n        checkIndex,\n        flags: 2 /* TypeText */,\n        childFlags: 0,\n        directChildFlags: 0,\n        childMatchedQueries: 0,\n        matchedQueries: {},\n        matchedQueryIds: 0,\n        references: {},\n        ngContentIndex,\n        childCount: 0,\n        bindings,\n        bindingFlags: 8 /* TypeProperty */,\n        outputs: [],\n        element: null,\n        provider: null,\n        text: { prefix: staticText[0] },\n        query: null,\n        ngContent: null,\n    };\n}\nfunction createText(view, renderHost, def) {\n    let renderNode;\n    const renderer = view.renderer;\n    renderNode = renderer.createText(def.text.prefix);\n    const parentEl = getParentRenderElement(view, renderHost, def);\n    if (parentEl) {\n        renderer.appendChild(parentEl, renderNode);\n    }\n    return { renderText: renderNode };\n}\nfunction checkAndUpdateTextInline(view, def, v0, v1, v2, v3, v4, v5, v6, v7, v8, v9) {\n    let changed = false;\n    const bindings = def.bindings;\n    const bindLen = bindings.length;\n    if (bindLen > 0 && checkAndUpdateBinding(view, def, 0, v0))\n        changed = true;\n    if (bindLen > 1 && checkAndUpdateBinding(view, def, 1, v1))\n        changed = true;\n    if (bindLen > 2 && checkAndUpdateBinding(view, def, 2, v2))\n        changed = true;\n    if (bindLen > 3 && checkAndUpdateBinding(view, def, 3, v3))\n        changed = true;\n    if (bindLen > 4 && checkAndUpdateBinding(view, def, 4, v4))\n        changed = true;\n    if (bindLen > 5 && checkAndUpdateBinding(view, def, 5, v5))\n        changed = true;\n    if (bindLen > 6 && checkAndUpdateBinding(view, def, 6, v6))\n        changed = true;\n    if (bindLen > 7 && checkAndUpdateBinding(view, def, 7, v7))\n        changed = true;\n    if (bindLen > 8 && checkAndUpdateBinding(view, def, 8, v8))\n        changed = true;\n    if (bindLen > 9 && checkAndUpdateBinding(view, def, 9, v9))\n        changed = true;\n    if (changed) {\n        let value = def.text.prefix;\n        if (bindLen > 0)\n            value += _addInterpolationPart(v0, bindings[0]);\n        if (bindLen > 1)\n            value += _addInterpolationPart(v1, bindings[1]);\n        if (bindLen > 2)\n            value += _addInterpolationPart(v2, bindings[2]);\n        if (bindLen > 3)\n            value += _addInterpolationPart(v3, bindings[3]);\n        if (bindLen > 4)\n            value += _addInterpolationPart(v4, bindings[4]);\n        if (bindLen > 5)\n            value += _addInterpolationPart(v5, bindings[5]);\n        if (bindLen > 6)\n            value += _addInterpolationPart(v6, bindings[6]);\n        if (bindLen > 7)\n            value += _addInterpolationPart(v7, bindings[7]);\n        if (bindLen > 8)\n            value += _addInterpolationPart(v8, bindings[8]);\n        if (bindLen > 9)\n            value += _addInterpolationPart(v9, bindings[9]);\n        const renderNode = asTextData(view, def.nodeIndex).renderText;\n        view.renderer.setValue(renderNode, value);\n    }\n    return changed;\n}\nfunction checkAndUpdateTextDynamic(view, def, values) {\n    const bindings = def.bindings;\n    let changed = false;\n    for (let i = 0; i < values.length; i++) {\n        // Note: We need to loop over all values, so that\n        // the old values are updates as well!\n        if (checkAndUpdateBinding(view, def, i, values[i])) {\n            changed = true;\n        }\n    }\n    if (changed) {\n        let value = '';\n        for (let i = 0; i < values.length; i++) {\n            value = value + _addInterpolationPart(values[i], bindings[i]);\n        }\n        value = def.text.prefix + value;\n        const renderNode = asTextData(view, def.nodeIndex).renderText;\n        view.renderer.setValue(renderNode, value);\n    }\n    return changed;\n}\nfunction _addInterpolationPart(value, binding) {\n    const valueStr = value != null ? value.toString() : '';\n    return valueStr + binding.suffix;\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction viewDef(flags, nodes, updateDirectives, updateRenderer) {\n    // clone nodes and set auto calculated values\n    let viewBindingCount = 0;\n    let viewDisposableCount = 0;\n    let viewNodeFlags = 0;\n    let viewRootNodeFlags = 0;\n    let viewMatchedQueries = 0;\n    let currentParent = null;\n    let currentRenderParent = null;\n    let currentElementHasPublicProviders = false;\n    let currentElementHasPrivateProviders = false;\n    let lastRenderRootNode = null;\n    for (let i = 0; i < nodes.length; i++) {\n        const node = nodes[i];\n        node.nodeIndex = i;\n        node.parent = currentParent;\n        node.bindingIndex = viewBindingCount;\n        node.outputIndex = viewDisposableCount;\n        node.renderParent = currentRenderParent;\n        viewNodeFlags |= node.flags;\n        viewMatchedQueries |= node.matchedQueryIds;\n        if (node.element) {\n            const elDef = node.element;\n            elDef.publicProviders =\n                currentParent ? currentParent.element.publicProviders : Object.create(null);\n            elDef.allProviders = elDef.publicProviders;\n            // Note: We assume that all providers of an element are before any child element!\n            currentElementHasPublicProviders = false;\n            currentElementHasPrivateProviders = false;\n            if (node.element.template) {\n                viewMatchedQueries |= node.element.template.nodeMatchedQueries;\n            }\n        }\n        validateNode(currentParent, node, nodes.length);\n        viewBindingCount += node.bindings.length;\n        viewDisposableCount += node.outputs.length;\n        if (!currentRenderParent && (node.flags & 3 /* CatRenderNode */)) {\n            lastRenderRootNode = node;\n        }\n        if (node.flags & 20224 /* CatProvider */) {\n            if (!currentElementHasPublicProviders) {\n                currentElementHasPublicProviders = true;\n                // Use prototypical inheritance to not get O(n^2) complexity...\n                currentParent.element.publicProviders =\n                    Object.create(currentParent.element.publicProviders);\n                currentParent.element.allProviders = currentParent.element.publicProviders;\n            }\n            const isPrivateService = (node.flags & 8192 /* PrivateProvider */) !== 0;\n            const isComponent = (node.flags & 32768 /* Component */) !== 0;\n            if (!isPrivateService || isComponent) {\n                currentParent.element.publicProviders[tokenKey(node.provider.token)] = node;\n            }\n            else {\n                if (!currentElementHasPrivateProviders) {\n                    currentElementHasPrivateProviders = true;\n                    // Use prototypical inheritance to not get O(n^2) complexity...\n                    currentParent.element.allProviders =\n                        Object.create(currentParent.element.publicProviders);\n                }\n                currentParent.element.allProviders[tokenKey(node.provider.token)] = node;\n            }\n            if (isComponent) {\n                currentParent.element.componentProvider = node;\n            }\n        }\n        if (currentParent) {\n            currentParent.childFlags |= node.flags;\n            currentParent.directChildFlags |= node.flags;\n            currentParent.childMatchedQueries |= node.matchedQueryIds;\n            if (node.element && node.element.template) {\n                currentParent.childMatchedQueries |= node.element.template.nodeMatchedQueries;\n            }\n        }\n        else {\n            viewRootNodeFlags |= node.flags;\n        }\n        if (node.childCount > 0) {\n            currentParent = node;\n            if (!isNgContainer(node)) {\n                currentRenderParent = node;\n            }\n        }\n        else {\n            // When the current node has no children, check if it is the last children of its parent.\n            // When it is, propagate the flags up.\n            // The loop is required because an element could be the last transitive children of several\n            // elements. We loop to either the root or the highest opened element (= with remaining\n            // children)\n            while (currentParent && i === currentParent.nodeIndex + currentParent.childCount) {\n                const newParent = currentParent.parent;\n                if (newParent) {\n                    newParent.childFlags |= currentParent.childFlags;\n                    newParent.childMatchedQueries |= currentParent.childMatchedQueries;\n                }\n                currentParent = newParent;\n                // We also need to update the render parent & account for ng-container\n                if (currentParent && isNgContainer(currentParent)) {\n                    currentRenderParent = currentParent.renderParent;\n                }\n                else {\n                    currentRenderParent = currentParent;\n                }\n            }\n        }\n    }\n    const handleEvent = (view, nodeIndex, eventName, event) => nodes[nodeIndex].element.handleEvent(view, eventName, event);\n    return {\n        // Will be filled later...\n        factory: null,\n        nodeFlags: viewNodeFlags,\n        rootNodeFlags: viewRootNodeFlags,\n        nodeMatchedQueries: viewMatchedQueries,\n        flags,\n        nodes: nodes,\n        updateDirectives: updateDirectives || NOOP,\n        updateRenderer: updateRenderer || NOOP,\n        handleEvent,\n        bindingCount: viewBindingCount,\n        outputCount: viewDisposableCount,\n        lastRenderRootNode\n    };\n}\nfunction isNgContainer(node) {\n    return (node.flags & 1 /* TypeElement */) !== 0 && node.element.name === null;\n}\nfunction validateNode(parent, node, nodeCount) {\n    const template = node.element && node.element.template;\n    if (template) {\n        if (!template.lastRenderRootNode) {\n            throw new Error(`Illegal State: Embedded templates without nodes are not allowed!`);\n        }\n        if (template.lastRenderRootNode &&\n            template.lastRenderRootNode.flags & 16777216 /* EmbeddedViews */) {\n            throw new Error(`Illegal State: Last root node of a template can't have embedded views, at index ${node.nodeIndex}!`);\n        }\n    }\n    if (node.flags & 20224 /* CatProvider */) {\n        const parentFlags = parent ? parent.flags : 0;\n        if ((parentFlags & 1 /* TypeElement */) === 0) {\n            throw new Error(`Illegal State: StaticProvider/Directive nodes need to be children of elements or anchors, at index ${node.nodeIndex}!`);\n        }\n    }\n    if (node.query) {\n        if (node.flags & 67108864 /* TypeContentQuery */ &&\n            (!parent || (parent.flags & 16384 /* TypeDirective */) === 0)) {\n            throw new Error(`Illegal State: Content Query nodes need to be children of directives, at index ${node.nodeIndex}!`);\n        }\n        if (node.flags & 134217728 /* TypeViewQuery */ && parent) {\n            throw new Error(`Illegal State: View Query nodes have to be top level nodes, at index ${node.nodeIndex}!`);\n        }\n    }\n    if (node.childCount) {\n        const parentEnd = parent ? parent.nodeIndex + parent.childCount : nodeCount - 1;\n        if (node.nodeIndex <= parentEnd && node.nodeIndex + node.childCount > parentEnd) {\n            throw new Error(`Illegal State: childCount of node leads outside of parent, at index ${node.nodeIndex}!`);\n        }\n    }\n}\nfunction createEmbeddedView(parent, anchorDef, viewDef, context) {\n    // embedded views are seen as siblings to the anchor, so we need\n    // to get the parent of the anchor and use it as parentIndex.\n    const view = createView(parent.root, parent.renderer, parent, anchorDef, viewDef);\n    initView(view, parent.component, context);\n    createViewNodes(view);\n    return view;\n}\nfunction createRootView(root, def, context) {\n    const view = createView(root, root.renderer, null, null, def);\n    initView(view, context, context);\n    createViewNodes(view);\n    return view;\n}\nfunction createComponentView(parentView, nodeDef, viewDef, hostElement) {\n    const rendererType = nodeDef.element.componentRendererType;\n    let compRenderer;\n    if (!rendererType) {\n        compRenderer = parentView.root.renderer;\n    }\n    else {\n        compRenderer = parentView.root.rendererFactory.createRenderer(hostElement, rendererType);\n    }\n    return createView(parentView.root, compRenderer, parentView, nodeDef.element.componentProvider, viewDef);\n}\nfunction createView(root, renderer, parent, parentNodeDef, def) {\n    const nodes = new Array(def.nodes.length);\n    const disposables = def.outputCount ? new Array(def.outputCount) : null;\n    const view = {\n        def,\n        parent,\n        viewContainerParent: null,\n        parentNodeDef,\n        context: null,\n        component: null,\n        nodes,\n        state: 13 /* CatInit */,\n        root,\n        renderer,\n        oldValues: new Array(def.bindingCount),\n        disposables,\n        initIndex: -1\n    };\n    return view;\n}\nfunction initView(view, component, context) {\n    view.component = component;\n    view.context = context;\n}\nfunction createViewNodes(view) {\n    let renderHost;\n    if (isComponentView(view)) {\n        const hostDef = view.parentNodeDef;\n        renderHost = asElementData(view.parent, hostDef.parent.nodeIndex).renderElement;\n    }\n    const def = view.def;\n    const nodes = view.nodes;\n    for (let i = 0; i < def.nodes.length; i++) {\n        const nodeDef = def.nodes[i];\n        Services.setCurrentNode(view, i);\n        let nodeData;\n        switch (nodeDef.flags & 201347067 /* Types */) {\n            case 1 /* TypeElement */:\n                const el = createElement(view, renderHost, nodeDef);\n                let componentView = undefined;\n                if (nodeDef.flags & 33554432 /* ComponentView */) {\n                    const compViewDef = resolveDefinition(nodeDef.element.componentView);\n                    componentView = Services.createComponentView(view, nodeDef, compViewDef, el);\n                }\n                listenToElementOutputs(view, componentView, nodeDef, el);\n                nodeData = {\n                    renderElement: el,\n                    componentView,\n                    viewContainer: null,\n                    template: nodeDef.element.template ? createTemplateData(view, nodeDef) : undefined\n                };\n                if (nodeDef.flags & 16777216 /* EmbeddedViews */) {\n                    nodeData.viewContainer = createViewContainerData(view, nodeDef, nodeData);\n                }\n                break;\n            case 2 /* TypeText */:\n                nodeData = createText(view, renderHost, nodeDef);\n                break;\n            case 512 /* TypeClassProvider */:\n            case 1024 /* TypeFactoryProvider */:\n            case 2048 /* TypeUseExistingProvider */:\n            case 256 /* TypeValueProvider */: {\n                nodeData = nodes[i];\n                if (!nodeData && !(nodeDef.flags & 4096 /* LazyProvider */)) {\n                    const instance = createProviderInstance(view, nodeDef);\n                    nodeData = { instance };\n                }\n                break;\n            }\n            case 16 /* TypePipe */: {\n                const instance = createPipeInstance(view, nodeDef);\n                nodeData = { instance };\n                break;\n            }\n            case 16384 /* TypeDirective */: {\n                nodeData = nodes[i];\n                if (!nodeData) {\n                    const instance = createDirectiveInstance(view, nodeDef);\n                    nodeData = { instance };\n                }\n                if (nodeDef.flags & 32768 /* Component */) {\n                    const compView = asElementData(view, nodeDef.parent.nodeIndex).componentView;\n                    initView(compView, nodeData.instance, nodeData.instance);\n                }\n                break;\n            }\n            case 32 /* TypePureArray */:\n            case 64 /* TypePureObject */:\n            case 128 /* TypePurePipe */:\n                nodeData = createPureExpression(view, nodeDef);\n                break;\n            case 67108864 /* TypeContentQuery */:\n            case 134217728 /* TypeViewQuery */:\n                nodeData = createQuery();\n                break;\n            case 8 /* TypeNgContent */:\n                appendNgContent(view, renderHost, nodeDef);\n                // no runtime data needed for NgContent...\n                nodeData = undefined;\n                break;\n        }\n        nodes[i] = nodeData;\n    }\n    // Create the ViewData.nodes of component views after we created everything else,\n    // so that e.g. ng-content works\n    execComponentViewsAction(view, ViewAction.CreateViewNodes);\n    // fill static content and view queries\n    execQueriesAction(view, 67108864 /* TypeContentQuery */ | 134217728 /* TypeViewQuery */, 268435456 /* StaticQuery */, 0 /* CheckAndUpdate */);\n}\nfunction checkNoChangesView(view) {\n    markProjectedViewsForCheck(view);\n    Services.updateDirectives(view, 1 /* CheckNoChanges */);\n    execEmbeddedViewsAction(view, ViewAction.CheckNoChanges);\n    Services.updateRenderer(view, 1 /* CheckNoChanges */);\n    execComponentViewsAction(view, ViewAction.CheckNoChanges);\n    // Note: We don't check queries for changes as we didn't do this in v2.x.\n    // TODO(tbosch): investigate if we can enable the check again in v5.x with a nicer error message.\n    view.state &= ~(64 /* CheckProjectedViews */ | 32 /* CheckProjectedView */);\n}\nfunction checkAndUpdateView(view) {\n    if (view.state & 1 /* BeforeFirstCheck */) {\n        view.state &= ~1 /* BeforeFirstCheck */;\n        view.state |= 2 /* FirstCheck */;\n    }\n    else {\n        view.state &= ~2 /* FirstCheck */;\n    }\n    shiftInitState(view, 0 /* InitState_BeforeInit */, 256 /* InitState_CallingOnInit */);\n    markProjectedViewsForCheck(view);\n    Services.updateDirectives(view, 0 /* CheckAndUpdate */);\n    execEmbeddedViewsAction(view, ViewAction.CheckAndUpdate);\n    execQueriesAction(view, 67108864 /* TypeContentQuery */, 536870912 /* DynamicQuery */, 0 /* CheckAndUpdate */);\n    let callInit = shiftInitState(view, 256 /* InitState_CallingOnInit */, 512 /* InitState_CallingAfterContentInit */);\n    callLifecycleHooksChildrenFirst(view, 2097152 /* AfterContentChecked */ | (callInit ? 1048576 /* AfterContentInit */ : 0));\n    Services.updateRenderer(view, 0 /* CheckAndUpdate */);\n    execComponentViewsAction(view, ViewAction.CheckAndUpdate);\n    execQueriesAction(view, 134217728 /* TypeViewQuery */, 536870912 /* DynamicQuery */, 0 /* CheckAndUpdate */);\n    callInit = shiftInitState(view, 512 /* InitState_CallingAfterContentInit */, 768 /* InitState_CallingAfterViewInit */);\n    callLifecycleHooksChildrenFirst(view, 8388608 /* AfterViewChecked */ | (callInit ? 4194304 /* AfterViewInit */ : 0));\n    if (view.def.flags & 2 /* OnPush */) {\n        view.state &= ~8 /* ChecksEnabled */;\n    }\n    view.state &= ~(64 /* CheckProjectedViews */ | 32 /* CheckProjectedView */);\n    shiftInitState(view, 768 /* InitState_CallingAfterViewInit */, 1024 /* InitState_AfterInit */);\n}\nfunction checkAndUpdateNode(view, nodeDef, argStyle, v0, v1, v2, v3, v4, v5, v6, v7, v8, v9) {\n    if (argStyle === 0 /* Inline */) {\n        return checkAndUpdateNodeInline(view, nodeDef, v0, v1, v2, v3, v4, v5, v6, v7, v8, v9);\n    }\n    else {\n        return checkAndUpdateNodeDynamic(view, nodeDef, v0);\n    }\n}\nfunction markProjectedViewsForCheck(view) {\n    const def = view.def;\n    if (!(def.nodeFlags & 4 /* ProjectedTemplate */)) {\n        return;\n    }\n    for (let i = 0; i < def.nodes.length; i++) {\n        const nodeDef = def.nodes[i];\n        if (nodeDef.flags & 4 /* ProjectedTemplate */) {\n            const projectedViews = asElementData(view, i).template._projectedViews;\n            if (projectedViews) {\n                for (let i = 0; i < projectedViews.length; i++) {\n                    const projectedView = projectedViews[i];\n                    projectedView.state |= 32 /* CheckProjectedView */;\n                    markParentViewsForCheckProjectedViews(projectedView, view);\n                }\n            }\n        }\n        else if ((nodeDef.childFlags & 4 /* ProjectedTemplate */) === 0) {\n            // a parent with leafs\n            // no child is a component,\n            // then skip the children\n            i += nodeDef.childCount;\n        }\n    }\n}\nfunction checkAndUpdateNodeInline(view, nodeDef, v0, v1, v2, v3, v4, v5, v6, v7, v8, v9) {\n    switch (nodeDef.flags & 201347067 /* Types */) {\n        case 1 /* TypeElement */:\n            return checkAndUpdateElementInline(view, nodeDef, v0, v1, v2, v3, v4, v5, v6, v7, v8, v9);\n        case 2 /* TypeText */:\n            return checkAndUpdateTextInline(view, nodeDef, v0, v1, v2, v3, v4, v5, v6, v7, v8, v9);\n        case 16384 /* TypeDirective */:\n            return checkAndUpdateDirectiveInline(view, nodeDef, v0, v1, v2, v3, v4, v5, v6, v7, v8, v9);\n        case 32 /* TypePureArray */:\n        case 64 /* TypePureObject */:\n        case 128 /* TypePurePipe */:\n            return checkAndUpdatePureExpressionInline(view, nodeDef, v0, v1, v2, v3, v4, v5, v6, v7, v8, v9);\n        default:\n            throw 'unreachable';\n    }\n}\nfunction checkAndUpdateNodeDynamic(view, nodeDef, values) {\n    switch (nodeDef.flags & 201347067 /* Types */) {\n        case 1 /* TypeElement */:\n            return checkAndUpdateElementDynamic(view, nodeDef, values);\n        case 2 /* TypeText */:\n            return checkAndUpdateTextDynamic(view, nodeDef, values);\n        case 16384 /* TypeDirective */:\n            return checkAndUpdateDirectiveDynamic(view, nodeDef, values);\n        case 32 /* TypePureArray */:\n        case 64 /* TypePureObject */:\n        case 128 /* TypePurePipe */:\n            return checkAndUpdatePureExpressionDynamic(view, nodeDef, values);\n        default:\n            throw 'unreachable';\n    }\n}\nfunction checkNoChangesNode(view, nodeDef, argStyle, v0, v1, v2, v3, v4, v5, v6, v7, v8, v9) {\n    if (argStyle === 0 /* Inline */) {\n        checkNoChangesNodeInline(view, nodeDef, v0, v1, v2, v3, v4, v5, v6, v7, v8, v9);\n    }\n    else {\n        checkNoChangesNodeDynamic(view, nodeDef, v0);\n    }\n    // Returning false is ok here as we would have thrown in case of a change.\n    return false;\n}\nfunction checkNoChangesNodeInline(view, nodeDef, v0, v1, v2, v3, v4, v5, v6, v7, v8, v9) {\n    const bindLen = nodeDef.bindings.length;\n    if (bindLen > 0)\n        checkBindingNoChanges(view, nodeDef, 0, v0);\n    if (bindLen > 1)\n        checkBindingNoChanges(view, nodeDef, 1, v1);\n    if (bindLen > 2)\n        checkBindingNoChanges(view, nodeDef, 2, v2);\n    if (bindLen > 3)\n        checkBindingNoChanges(view, nodeDef, 3, v3);\n    if (bindLen > 4)\n        checkBindingNoChanges(view, nodeDef, 4, v4);\n    if (bindLen > 5)\n        checkBindingNoChanges(view, nodeDef, 5, v5);\n    if (bindLen > 6)\n        checkBindingNoChanges(view, nodeDef, 6, v6);\n    if (bindLen > 7)\n        checkBindingNoChanges(view, nodeDef, 7, v7);\n    if (bindLen > 8)\n        checkBindingNoChanges(view, nodeDef, 8, v8);\n    if (bindLen > 9)\n        checkBindingNoChanges(view, nodeDef, 9, v9);\n}\nfunction checkNoChangesNodeDynamic(view, nodeDef, values) {\n    for (let i = 0; i < values.length; i++) {\n        checkBindingNoChanges(view, nodeDef, i, values[i]);\n    }\n}\n/**\n * Workaround https://github.com/angular/tsickle/issues/497\n * @suppress {misplacedTypeAnnotation}\n */\nfunction checkNoChangesQuery(view, nodeDef) {\n    const queryList = asQueryList(view, nodeDef.nodeIndex);\n    if (queryList.dirty) {\n        throw expressionChangedAfterItHasBeenCheckedError(Services.createDebugContext(view, nodeDef.nodeIndex), `Query ${nodeDef.query.id} not dirty`, `Query ${nodeDef.query.id} dirty`, (view.state & 1 /* BeforeFirstCheck */) !== 0);\n    }\n}\nfunction destroyView(view) {\n    if (view.state & 128 /* Destroyed */) {\n        return;\n    }\n    execEmbeddedViewsAction(view, ViewAction.Destroy);\n    execComponentViewsAction(view, ViewAction.Destroy);\n    callLifecycleHooksChildrenFirst(view, 131072 /* OnDestroy */);\n    if (view.disposables) {\n        for (let i = 0; i < view.disposables.length; i++) {\n            view.disposables[i]();\n        }\n    }\n    detachProjectedView(view);\n    if (view.renderer.destroyNode) {\n        destroyViewNodes(view);\n    }\n    if (isComponentView(view)) {\n        view.renderer.destroy();\n    }\n    view.state |= 128 /* Destroyed */;\n}\nfunction destroyViewNodes(view) {\n    const len = view.def.nodes.length;\n    for (let i = 0; i < len; i++) {\n        const def = view.def.nodes[i];\n        if (def.flags & 1 /* TypeElement */) {\n            view.renderer.destroyNode(asElementData(view, i).renderElement);\n        }\n        else if (def.flags & 2 /* TypeText */) {\n            view.renderer.destroyNode(asTextData(view, i).renderText);\n        }\n        else if (def.flags & 67108864 /* TypeContentQuery */ || def.flags & 134217728 /* TypeViewQuery */) {\n            asQueryList(view, i).destroy();\n        }\n    }\n}\nvar ViewAction;\n(function (ViewAction) {\n    ViewAction[ViewAction[\"CreateViewNodes\"] = 0] = \"CreateViewNodes\";\n    ViewAction[ViewAction[\"CheckNoChanges\"] = 1] = \"CheckNoChanges\";\n    ViewAction[ViewAction[\"CheckNoChangesProjectedViews\"] = 2] = \"CheckNoChangesProjectedViews\";\n    ViewAction[ViewAction[\"CheckAndUpdate\"] = 3] = \"CheckAndUpdate\";\n    ViewAction[ViewAction[\"CheckAndUpdateProjectedViews\"] = 4] = \"CheckAndUpdateProjectedViews\";\n    ViewAction[ViewAction[\"Destroy\"] = 5] = \"Destroy\";\n})(ViewAction || (ViewAction = {}));\nfunction execComponentViewsAction(view, action) {\n    const def = view.def;\n    if (!(def.nodeFlags & 33554432 /* ComponentView */)) {\n        return;\n    }\n    for (let i = 0; i < def.nodes.length; i++) {\n        const nodeDef = def.nodes[i];\n        if (nodeDef.flags & 33554432 /* ComponentView */) {\n            // a leaf\n            callViewAction(asElementData(view, i).componentView, action);\n        }\n        else if ((nodeDef.childFlags & 33554432 /* ComponentView */) === 0) {\n            // a parent with leafs\n            // no child is a component,\n            // then skip the children\n            i += nodeDef.childCount;\n        }\n    }\n}\nfunction execEmbeddedViewsAction(view, action) {\n    const def = view.def;\n    if (!(def.nodeFlags & 16777216 /* EmbeddedViews */)) {\n        return;\n    }\n    for (let i = 0; i < def.nodes.length; i++) {\n        const nodeDef = def.nodes[i];\n        if (nodeDef.flags & 16777216 /* EmbeddedViews */) {\n            // a leaf\n            const embeddedViews = asElementData(view, i).viewContainer._embeddedViews;\n            for (let k = 0; k < embeddedViews.length; k++) {\n                callViewAction(embeddedViews[k], action);\n            }\n        }\n        else if ((nodeDef.childFlags & 16777216 /* EmbeddedViews */) === 0) {\n            // a parent with leafs\n            // no child is a component,\n            // then skip the children\n            i += nodeDef.childCount;\n        }\n    }\n}\nfunction callViewAction(view, action) {\n    const viewState = view.state;\n    switch (action) {\n        case ViewAction.CheckNoChanges:\n            if ((viewState & 128 /* Destroyed */) === 0) {\n                if ((viewState & 12 /* CatDetectChanges */) === 12 /* CatDetectChanges */) {\n                    checkNoChangesView(view);\n                }\n                else if (viewState & 64 /* CheckProjectedViews */) {\n                    execProjectedViewsAction(view, ViewAction.CheckNoChangesProjectedViews);\n                }\n            }\n            break;\n        case ViewAction.CheckNoChangesProjectedViews:\n            if ((viewState & 128 /* Destroyed */) === 0) {\n                if (viewState & 32 /* CheckProjectedView */) {\n                    checkNoChangesView(view);\n                }\n                else if (viewState & 64 /* CheckProjectedViews */) {\n                    execProjectedViewsAction(view, action);\n                }\n            }\n            break;\n        case ViewAction.CheckAndUpdate:\n            if ((viewState & 128 /* Destroyed */) === 0) {\n                if ((viewState & 12 /* CatDetectChanges */) === 12 /* CatDetectChanges */) {\n                    checkAndUpdateView(view);\n                }\n                else if (viewState & 64 /* CheckProjectedViews */) {\n                    execProjectedViewsAction(view, ViewAction.CheckAndUpdateProjectedViews);\n                }\n            }\n            break;\n        case ViewAction.CheckAndUpdateProjectedViews:\n            if ((viewState & 128 /* Destroyed */) === 0) {\n                if (viewState & 32 /* CheckProjectedView */) {\n                    checkAndUpdateView(view);\n                }\n                else if (viewState & 64 /* CheckProjectedViews */) {\n                    execProjectedViewsAction(view, action);\n                }\n            }\n            break;\n        case ViewAction.Destroy:\n            // Note: destroyView recurses over all views,\n            // so we don't need to special case projected views here.\n            destroyView(view);\n            break;\n        case ViewAction.CreateViewNodes:\n            createViewNodes(view);\n            break;\n    }\n}\nfunction execProjectedViewsAction(view, action) {\n    execEmbeddedViewsAction(view, action);\n    execComponentViewsAction(view, action);\n}\nfunction execQueriesAction(view, queryFlags, staticDynamicQueryFlag, checkType) {\n    if (!(view.def.nodeFlags & queryFlags) || !(view.def.nodeFlags & staticDynamicQueryFlag)) {\n        return;\n    }\n    const nodeCount = view.def.nodes.length;\n    for (let i = 0; i < nodeCount; i++) {\n        const nodeDef = view.def.nodes[i];\n        if ((nodeDef.flags & queryFlags) && (nodeDef.flags & staticDynamicQueryFlag)) {\n            Services.setCurrentNode(view, nodeDef.nodeIndex);\n            switch (checkType) {\n                case 0 /* CheckAndUpdate */:\n                    checkAndUpdateQuery(view, nodeDef);\n                    break;\n                case 1 /* CheckNoChanges */:\n                    checkNoChangesQuery(view, nodeDef);\n                    break;\n            }\n        }\n        if (!(nodeDef.childFlags & queryFlags) || !(nodeDef.childFlags & staticDynamicQueryFlag)) {\n            // no child has a matching query\n            // then skip the children\n            i += nodeDef.childCount;\n        }\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nlet initialized = false;\nfunction initServicesIfNeeded() {\n    if (initialized) {\n        return;\n    }\n    initialized = true;\n    const services = isDevMode() ? createDebugServices() : createProdServices();\n    Services.setCurrentNode = services.setCurrentNode;\n    Services.createRootView = services.createRootView;\n    Services.createEmbeddedView = services.createEmbeddedView;\n    Services.createComponentView = services.createComponentView;\n    Services.createNgModuleRef = services.createNgModuleRef;\n    Services.overrideProvider = services.overrideProvider;\n    Services.overrideComponentView = services.overrideComponentView;\n    Services.clearOverrides = services.clearOverrides;\n    Services.checkAndUpdateView = services.checkAndUpdateView;\n    Services.checkNoChangesView = services.checkNoChangesView;\n    Services.destroyView = services.destroyView;\n    Services.resolveDep = resolveDep;\n    Services.createDebugContext = services.createDebugContext;\n    Services.handleEvent = services.handleEvent;\n    Services.updateDirectives = services.updateDirectives;\n    Services.updateRenderer = services.updateRenderer;\n    Services.dirtyParentQueries = dirtyParentQueries;\n}\nfunction createProdServices() {\n    return {\n        setCurrentNode: () => { },\n        createRootView: createProdRootView,\n        createEmbeddedView: createEmbeddedView,\n        createComponentView: createComponentView,\n        createNgModuleRef: createNgModuleRef,\n        overrideProvider: NOOP,\n        overrideComponentView: NOOP,\n        clearOverrides: NOOP,\n        checkAndUpdateView: checkAndUpdateView,\n        checkNoChangesView: checkNoChangesView,\n        destroyView: destroyView,\n        createDebugContext: (view, nodeIndex) => new DebugContext_(view, nodeIndex),\n        handleEvent: (view, nodeIndex, eventName, event) => view.def.handleEvent(view, nodeIndex, eventName, event),\n        updateDirectives: (view, checkType) => view.def.updateDirectives(checkType === 0 /* CheckAndUpdate */ ? prodCheckAndUpdateNode : prodCheckNoChangesNode, view),\n        updateRenderer: (view, checkType) => view.def.updateRenderer(checkType === 0 /* CheckAndUpdate */ ? prodCheckAndUpdateNode : prodCheckNoChangesNode, view),\n    };\n}\nfunction createDebugServices() {\n    return {\n        setCurrentNode: debugSetCurrentNode,\n        createRootView: debugCreateRootView,\n        createEmbeddedView: debugCreateEmbeddedView,\n        createComponentView: debugCreateComponentView,\n        createNgModuleRef: debugCreateNgModuleRef,\n        overrideProvider: debugOverrideProvider,\n        overrideComponentView: debugOverrideComponentView,\n        clearOverrides: debugClearOverrides,\n        checkAndUpdateView: debugCheckAndUpdateView,\n        checkNoChangesView: debugCheckNoChangesView,\n        destroyView: debugDestroyView,\n        createDebugContext: (view, nodeIndex) => new DebugContext_(view, nodeIndex),\n        handleEvent: debugHandleEvent,\n        updateDirectives: debugUpdateDirectives,\n        updateRenderer: debugUpdateRenderer,\n    };\n}\nfunction createProdRootView(elInjector, projectableNodes, rootSelectorOrNode, def, ngModule, context) {\n    const rendererFactory = ngModule.injector.get(RendererFactory2);\n    return createRootView(createRootData(elInjector, ngModule, rendererFactory, projectableNodes, rootSelectorOrNode), def, context);\n}\nfunction debugCreateRootView(elInjector, projectableNodes, rootSelectorOrNode, def, ngModule, context) {\n    const rendererFactory = ngModule.injector.get(RendererFactory2);\n    const root = createRootData(elInjector, ngModule, new DebugRendererFactory2(rendererFactory), projectableNodes, rootSelectorOrNode);\n    const defWithOverride = applyProviderOverridesToView(def);\n    return callWithDebugContext(DebugAction.create, createRootView, null, [root, defWithOverride, context]);\n}\nfunction createRootData(elInjector, ngModule, rendererFactory, projectableNodes, rootSelectorOrNode) {\n    const sanitizer = ngModule.injector.get(Sanitizer);\n    const errorHandler = ngModule.injector.get(ErrorHandler);\n    const renderer = rendererFactory.createRenderer(null, null);\n    return {\n        ngModule,\n        injector: elInjector,\n        projectableNodes,\n        selectorOrNode: rootSelectorOrNode,\n        sanitizer,\n        rendererFactory,\n        renderer,\n        errorHandler\n    };\n}\nfunction debugCreateEmbeddedView(parentView, anchorDef, viewDef, context) {\n    const defWithOverride = applyProviderOverridesToView(viewDef);\n    return callWithDebugContext(DebugAction.create, createEmbeddedView, null, [parentView, anchorDef, defWithOverride, context]);\n}\nfunction debugCreateComponentView(parentView, nodeDef, viewDef, hostElement) {\n    const overrideComponentView = viewDefOverrides.get(nodeDef.element.componentProvider.provider.token);\n    if (overrideComponentView) {\n        viewDef = overrideComponentView;\n    }\n    else {\n        viewDef = applyProviderOverridesToView(viewDef);\n    }\n    return callWithDebugContext(DebugAction.create, createComponentView, null, [parentView, nodeDef, viewDef, hostElement]);\n}\nfunction debugCreateNgModuleRef(moduleType, parentInjector, bootstrapComponents, def) {\n    const defWithOverride = applyProviderOverridesToNgModule(def);\n    return createNgModuleRef(moduleType, parentInjector, bootstrapComponents, defWithOverride);\n}\nconst providerOverrides = new Map();\nconst providerOverridesWithScope = new Map();\nconst viewDefOverrides = new Map();\nfunction debugOverrideProvider(override) {\n    providerOverrides.set(override.token, override);\n    let injectableDef;\n    if (typeof override.token === 'function' && (injectableDef = getInjectableDef(override.token)) &&\n        typeof injectableDef.providedIn === 'function') {\n        providerOverridesWithScope.set(override.token, override);\n    }\n}\nfunction debugOverrideComponentView(comp, compFactory) {\n    const hostViewDef = resolveDefinition(getComponentViewDefinitionFactory(compFactory));\n    const compViewDef = resolveDefinition(hostViewDef.nodes[0].element.componentView);\n    viewDefOverrides.set(comp, compViewDef);\n}\nfunction debugClearOverrides() {\n    providerOverrides.clear();\n    providerOverridesWithScope.clear();\n    viewDefOverrides.clear();\n}\n// Notes about the algorithm:\n// 1) Locate the providers of an element and check if one of them was overwritten\n// 2) Change the providers of that element\n//\n// We only create new datastructures if we need to, to keep perf impact\n// reasonable.\nfunction applyProviderOverridesToView(def) {\n    if (providerOverrides.size === 0) {\n        return def;\n    }\n    const elementIndicesWithOverwrittenProviders = findElementIndicesWithOverwrittenProviders(def);\n    if (elementIndicesWithOverwrittenProviders.length === 0) {\n        return def;\n    }\n    // clone the whole view definition,\n    // as it maintains references between the nodes that are hard to update.\n    def = def.factory(() => NOOP);\n    for (let i = 0; i < elementIndicesWithOverwrittenProviders.length; i++) {\n        applyProviderOverridesToElement(def, elementIndicesWithOverwrittenProviders[i]);\n    }\n    return def;\n    function findElementIndicesWithOverwrittenProviders(def) {\n        const elIndicesWithOverwrittenProviders = [];\n        let lastElementDef = null;\n        for (let i = 0; i < def.nodes.length; i++) {\n            const nodeDef = def.nodes[i];\n            if (nodeDef.flags & 1 /* TypeElement */) {\n                lastElementDef = nodeDef;\n            }\n            if (lastElementDef && nodeDef.flags & 3840 /* CatProviderNoDirective */ &&\n                providerOverrides.has(nodeDef.provider.token)) {\n                elIndicesWithOverwrittenProviders.push(lastElementDef.nodeIndex);\n                lastElementDef = null;\n            }\n        }\n        return elIndicesWithOverwrittenProviders;\n    }\n    function applyProviderOverridesToElement(viewDef, elIndex) {\n        for (let i = elIndex + 1; i < viewDef.nodes.length; i++) {\n            const nodeDef = viewDef.nodes[i];\n            if (nodeDef.flags & 1 /* TypeElement */) {\n                // stop at the next element\n                return;\n            }\n            if (nodeDef.flags & 3840 /* CatProviderNoDirective */) {\n                const provider = nodeDef.provider;\n                const override = providerOverrides.get(provider.token);\n                if (override) {\n                    nodeDef.flags = (nodeDef.flags & ~3840 /* CatProviderNoDirective */) | override.flags;\n                    provider.deps = splitDepsDsl(override.deps);\n                    provider.value = override.value;\n                }\n            }\n        }\n    }\n}\n// Notes about the algorithm:\n// We only create new datastructures if we need to, to keep perf impact\n// reasonable.\nfunction applyProviderOverridesToNgModule(def) {\n    const { hasOverrides, hasDeprecatedOverrides } = calcHasOverrides(def);\n    if (!hasOverrides) {\n        return def;\n    }\n    // clone the whole view definition,\n    // as it maintains references between the nodes that are hard to update.\n    def = def.factory(() => NOOP);\n    applyProviderOverrides(def);\n    return def;\n    function calcHasOverrides(def) {\n        let hasOverrides = false;\n        let hasDeprecatedOverrides = false;\n        if (providerOverrides.size === 0) {\n            return { hasOverrides, hasDeprecatedOverrides };\n        }\n        def.providers.forEach(node => {\n            const override = providerOverrides.get(node.token);\n            if ((node.flags & 3840 /* CatProviderNoDirective */) && override) {\n                hasOverrides = true;\n                hasDeprecatedOverrides = hasDeprecatedOverrides || override.deprecatedBehavior;\n            }\n        });\n        def.modules.forEach(module => {\n            providerOverridesWithScope.forEach((override, token) => {\n                if (getInjectableDef(token).providedIn === module) {\n                    hasOverrides = true;\n                    hasDeprecatedOverrides = hasDeprecatedOverrides || override.deprecatedBehavior;\n                }\n            });\n        });\n        return { hasOverrides, hasDeprecatedOverrides };\n    }\n    function applyProviderOverrides(def) {\n        for (let i = 0; i < def.providers.length; i++) {\n            const provider = def.providers[i];\n            if (hasDeprecatedOverrides) {\n                // We had a bug where me made\n                // all providers lazy. Keep this logic behind a flag\n                // for migrating existing users.\n                provider.flags |= 4096 /* LazyProvider */;\n            }\n            const override = providerOverrides.get(provider.token);\n            if (override) {\n                provider.flags = (provider.flags & ~3840 /* CatProviderNoDirective */) | override.flags;\n                provider.deps = splitDepsDsl(override.deps);\n                provider.value = override.value;\n            }\n        }\n        if (providerOverridesWithScope.size > 0) {\n            let moduleSet = new Set(def.modules);\n            providerOverridesWithScope.forEach((override, token) => {\n                if (moduleSet.has(getInjectableDef(token).providedIn)) {\n                    let provider = {\n                        token: token,\n                        flags: override.flags | (hasDeprecatedOverrides ? 4096 /* LazyProvider */ : 0 /* None */),\n                        deps: splitDepsDsl(override.deps),\n                        value: override.value,\n                        index: def.providers.length,\n                    };\n                    def.providers.push(provider);\n                    def.providersByKey[tokenKey(token)] = provider;\n                }\n            });\n        }\n    }\n}\nfunction prodCheckAndUpdateNode(view, checkIndex, argStyle, v0, v1, v2, v3, v4, v5, v6, v7, v8, v9) {\n    const nodeDef = view.def.nodes[checkIndex];\n    checkAndUpdateNode(view, nodeDef, argStyle, v0, v1, v2, v3, v4, v5, v6, v7, v8, v9);\n    return (nodeDef.flags & 224 /* CatPureExpression */) ?\n        asPureExpressionData(view, checkIndex).value :\n        undefined;\n}\nfunction prodCheckNoChangesNode(view, checkIndex, argStyle, v0, v1, v2, v3, v4, v5, v6, v7, v8, v9) {\n    const nodeDef = view.def.nodes[checkIndex];\n    checkNoChangesNode(view, nodeDef, argStyle, v0, v1, v2, v3, v4, v5, v6, v7, v8, v9);\n    return (nodeDef.flags & 224 /* CatPureExpression */) ?\n        asPureExpressionData(view, checkIndex).value :\n        undefined;\n}\nfunction debugCheckAndUpdateView(view) {\n    return callWithDebugContext(DebugAction.detectChanges, checkAndUpdateView, null, [view]);\n}\nfunction debugCheckNoChangesView(view) {\n    return callWithDebugContext(DebugAction.checkNoChanges, checkNoChangesView, null, [view]);\n}\nfunction debugDestroyView(view) {\n    return callWithDebugContext(DebugAction.destroy, destroyView, null, [view]);\n}\nvar DebugAction;\n(function (DebugAction) {\n    DebugAction[DebugAction[\"create\"] = 0] = \"create\";\n    DebugAction[DebugAction[\"detectChanges\"] = 1] = \"detectChanges\";\n    DebugAction[DebugAction[\"checkNoChanges\"] = 2] = \"checkNoChanges\";\n    DebugAction[DebugAction[\"destroy\"] = 3] = \"destroy\";\n    DebugAction[DebugAction[\"handleEvent\"] = 4] = \"handleEvent\";\n})(DebugAction || (DebugAction = {}));\nlet _currentAction;\nlet _currentView;\nlet _currentNodeIndex;\nfunction debugSetCurrentNode(view, nodeIndex) {\n    _currentView = view;\n    _currentNodeIndex = nodeIndex;\n}\nfunction debugHandleEvent(view, nodeIndex, eventName, event) {\n    debugSetCurrentNode(view, nodeIndex);\n    return callWithDebugContext(DebugAction.handleEvent, view.def.handleEvent, null, [view, nodeIndex, eventName, event]);\n}\nfunction debugUpdateDirectives(view, checkType) {\n    if (view.state & 128 /* Destroyed */) {\n        throw viewDestroyedError(DebugAction[_currentAction]);\n    }\n    debugSetCurrentNode(view, nextDirectiveWithBinding(view, 0));\n    return view.def.updateDirectives(debugCheckDirectivesFn, view);\n    function debugCheckDirectivesFn(view, nodeIndex, argStyle, ...values) {\n        const nodeDef = view.def.nodes[nodeIndex];\n        if (checkType === 0 /* CheckAndUpdate */) {\n            debugCheckAndUpdateNode(view, nodeDef, argStyle, values);\n        }\n        else {\n            debugCheckNoChangesNode(view, nodeDef, argStyle, values);\n        }\n        if (nodeDef.flags & 16384 /* TypeDirective */) {\n            debugSetCurrentNode(view, nextDirectiveWithBinding(view, nodeIndex));\n        }\n        return (nodeDef.flags & 224 /* CatPureExpression */) ?\n            asPureExpressionData(view, nodeDef.nodeIndex).value :\n            undefined;\n    }\n}\nfunction debugUpdateRenderer(view, checkType) {\n    if (view.state & 128 /* Destroyed */) {\n        throw viewDestroyedError(DebugAction[_currentAction]);\n    }\n    debugSetCurrentNode(view, nextRenderNodeWithBinding(view, 0));\n    return view.def.updateRenderer(debugCheckRenderNodeFn, view);\n    function debugCheckRenderNodeFn(view, nodeIndex, argStyle, ...values) {\n        const nodeDef = view.def.nodes[nodeIndex];\n        if (checkType === 0 /* CheckAndUpdate */) {\n            debugCheckAndUpdateNode(view, nodeDef, argStyle, values);\n        }\n        else {\n            debugCheckNoChangesNode(view, nodeDef, argStyle, values);\n        }\n        if (nodeDef.flags & 3 /* CatRenderNode */) {\n            debugSetCurrentNode(view, nextRenderNodeWithBinding(view, nodeIndex));\n        }\n        return (nodeDef.flags & 224 /* CatPureExpression */) ?\n            asPureExpressionData(view, nodeDef.nodeIndex).value :\n            undefined;\n    }\n}\nfunction debugCheckAndUpdateNode(view, nodeDef, argStyle, givenValues) {\n    const changed = checkAndUpdateNode(view, nodeDef, argStyle, ...givenValues);\n    if (changed) {\n        const values = argStyle === 1 /* Dynamic */ ? givenValues[0] : givenValues;\n        if (nodeDef.flags & 16384 /* TypeDirective */) {\n            const bindingValues = {};\n            for (let i = 0; i < nodeDef.bindings.length; i++) {\n                const binding = nodeDef.bindings[i];\n                const value = values[i];\n                if (binding.flags & 8 /* TypeProperty */) {\n                    bindingValues[normalizeDebugBindingName(binding.nonMinifiedName)] =\n                        normalizeDebugBindingValue(value);\n                }\n            }\n            const elDef = nodeDef.parent;\n            const el = asElementData(view, elDef.nodeIndex).renderElement;\n            if (!elDef.element.name) {\n                // a comment.\n                view.renderer.setValue(el, `bindings=${JSON.stringify(bindingValues, null, 2)}`);\n            }\n            else {\n                // a regular element.\n                for (let attr in bindingValues) {\n                    const value = bindingValues[attr];\n                    if (value != null) {\n                        view.renderer.setAttribute(el, attr, value);\n                    }\n                    else {\n                        view.renderer.removeAttribute(el, attr);\n                    }\n                }\n            }\n        }\n    }\n}\nfunction debugCheckNoChangesNode(view, nodeDef, argStyle, values) {\n    checkNoChangesNode(view, nodeDef, argStyle, ...values);\n}\nfunction nextDirectiveWithBinding(view, nodeIndex) {\n    for (let i = nodeIndex; i < view.def.nodes.length; i++) {\n        const nodeDef = view.def.nodes[i];\n        if (nodeDef.flags & 16384 /* TypeDirective */ && nodeDef.bindings && nodeDef.bindings.length) {\n            return i;\n        }\n    }\n    return null;\n}\nfunction nextRenderNodeWithBinding(view, nodeIndex) {\n    for (let i = nodeIndex; i < view.def.nodes.length; i++) {\n        const nodeDef = view.def.nodes[i];\n        if ((nodeDef.flags & 3 /* CatRenderNode */) && nodeDef.bindings && nodeDef.bindings.length) {\n            return i;\n        }\n    }\n    return null;\n}\nclass DebugContext_ {\n    constructor(view, nodeIndex) {\n        this.view = view;\n        this.nodeIndex = nodeIndex;\n        if (nodeIndex == null) {\n            this.nodeIndex = nodeIndex = 0;\n        }\n        this.nodeDef = view.def.nodes[nodeIndex];\n        let elDef = this.nodeDef;\n        let elView = view;\n        while (elDef && (elDef.flags & 1 /* TypeElement */) === 0) {\n            elDef = elDef.parent;\n        }\n        if (!elDef) {\n            while (!elDef && elView) {\n                elDef = viewParentEl(elView);\n                elView = elView.parent;\n            }\n        }\n        this.elDef = elDef;\n        this.elView = elView;\n    }\n    get elOrCompView() {\n        // Has to be done lazily as we use the DebugContext also during creation of elements...\n        return asElementData(this.elView, this.elDef.nodeIndex).componentView || this.view;\n    }\n    get injector() {\n        return createInjector$1(this.elView, this.elDef);\n    }\n    get component() {\n        return this.elOrCompView.component;\n    }\n    get context() {\n        return this.elOrCompView.context;\n    }\n    get providerTokens() {\n        const tokens = [];\n        if (this.elDef) {\n            for (let i = this.elDef.nodeIndex + 1; i <= this.elDef.nodeIndex + this.elDef.childCount; i++) {\n                const childDef = this.elView.def.nodes[i];\n                if (childDef.flags & 20224 /* CatProvider */) {\n                    tokens.push(childDef.provider.token);\n                }\n                i += childDef.childCount;\n            }\n        }\n        return tokens;\n    }\n    get references() {\n        const references = {};\n        if (this.elDef) {\n            collectReferences(this.elView, this.elDef, references);\n            for (let i = this.elDef.nodeIndex + 1; i <= this.elDef.nodeIndex + this.elDef.childCount; i++) {\n                const childDef = this.elView.def.nodes[i];\n                if (childDef.flags & 20224 /* CatProvider */) {\n                    collectReferences(this.elView, childDef, references);\n                }\n                i += childDef.childCount;\n            }\n        }\n        return references;\n    }\n    get componentRenderElement() {\n        const elData = findHostElement(this.elOrCompView);\n        return elData ? elData.renderElement : undefined;\n    }\n    get renderNode() {\n        return this.nodeDef.flags & 2 /* TypeText */ ? renderNode(this.view, this.nodeDef) :\n            renderNode(this.elView, this.elDef);\n    }\n    logError(console, ...values) {\n        let logViewDef;\n        let logNodeIndex;\n        if (this.nodeDef.flags & 2 /* TypeText */) {\n            logViewDef = this.view.def;\n            logNodeIndex = this.nodeDef.nodeIndex;\n        }\n        else {\n            logViewDef = this.elView.def;\n            logNodeIndex = this.elDef.nodeIndex;\n        }\n        // Note: we only generate a log function for text and element nodes\n        // to make the generated code as small as possible.\n        const renderNodeIndex = getRenderNodeIndex(logViewDef, logNodeIndex);\n        let currRenderNodeIndex = -1;\n        let nodeLogger = () => {\n            currRenderNodeIndex++;\n            if (currRenderNodeIndex === renderNodeIndex) {\n                return console.error.bind(console, ...values);\n            }\n            else {\n                return NOOP;\n            }\n        };\n        logViewDef.factory(nodeLogger);\n        if (currRenderNodeIndex < renderNodeIndex) {\n            console.error('Illegal state: the ViewDefinitionFactory did not call the logger!');\n            console.error(...values);\n        }\n    }\n}\nfunction getRenderNodeIndex(viewDef, nodeIndex) {\n    let renderNodeIndex = -1;\n    for (let i = 0; i <= nodeIndex; i++) {\n        const nodeDef = viewDef.nodes[i];\n        if (nodeDef.flags & 3 /* CatRenderNode */) {\n            renderNodeIndex++;\n        }\n    }\n    return renderNodeIndex;\n}\nfunction findHostElement(view) {\n    while (view && !isComponentView(view)) {\n        view = view.parent;\n    }\n    if (view.parent) {\n        return asElementData(view.parent, viewParentEl(view).nodeIndex);\n    }\n    return null;\n}\nfunction collectReferences(view, nodeDef, references) {\n    for (let refName in nodeDef.references) {\n        references[refName] = getQueryValue(view, nodeDef, nodeDef.references[refName]);\n    }\n}\nfunction callWithDebugContext(action, fn, self, args) {\n    const oldAction = _currentAction;\n    const oldView = _currentView;\n    const oldNodeIndex = _currentNodeIndex;\n    try {\n        _currentAction = action;\n        const result = fn.apply(self, args);\n        _currentView = oldView;\n        _currentNodeIndex = oldNodeIndex;\n        _currentAction = oldAction;\n        return result;\n    }\n    catch (e) {\n        if (isViewDebugError(e) || !_currentView) {\n            throw e;\n        }\n        throw viewWrappedDebugError(e, getCurrentDebugContext());\n    }\n}\nfunction getCurrentDebugContext() {\n    return _currentView ? new DebugContext_(_currentView, _currentNodeIndex) : null;\n}\nclass DebugRendererFactory2 {\n    constructor(delegate) {\n        this.delegate = delegate;\n    }\n    createRenderer(element, renderData) {\n        return new DebugRenderer2(this.delegate.createRenderer(element, renderData));\n    }\n    begin() {\n        if (this.delegate.begin) {\n            this.delegate.begin();\n        }\n    }\n    end() {\n        if (this.delegate.end) {\n            this.delegate.end();\n        }\n    }\n    whenRenderingDone() {\n        if (this.delegate.whenRenderingDone) {\n            return this.delegate.whenRenderingDone();\n        }\n        return Promise.resolve(null);\n    }\n}\nclass DebugRenderer2 {\n    constructor(delegate) {\n        this.delegate = delegate;\n        /**\n         * Factory function used to create a `DebugContext` when a node is created.\n         *\n         * The `DebugContext` allows to retrieve information about the nodes that are useful in tests.\n         *\n         * The factory is configurable so that the `DebugRenderer2` could instantiate either a View Engine\n         * or a Render context.\n         */\n        this.debugContextFactory = getCurrentDebugContext;\n        this.data = this.delegate.data;\n    }\n    createDebugContext(nativeElement) {\n        return this.debugContextFactory(nativeElement);\n    }\n    destroyNode(node) {\n        const debugNode = getDebugNode$1(node);\n        removeDebugNodeFromIndex(debugNode);\n        if (debugNode instanceof DebugNode__PRE_R3__) {\n            debugNode.listeners.length = 0;\n        }\n        if (this.delegate.destroyNode) {\n            this.delegate.destroyNode(node);\n        }\n    }\n    destroy() {\n        this.delegate.destroy();\n    }\n    createElement(name, namespace) {\n        const el = this.delegate.createElement(name, namespace);\n        const debugCtx = this.createDebugContext(el);\n        if (debugCtx) {\n            const debugEl = new DebugElement__PRE_R3__(el, null, debugCtx);\n            debugEl.name = name;\n            indexDebugNode(debugEl);\n        }\n        return el;\n    }\n    createComment(value) {\n        const comment = this.delegate.createComment(value);\n        const debugCtx = this.createDebugContext(comment);\n        if (debugCtx) {\n            indexDebugNode(new DebugNode__PRE_R3__(comment, null, debugCtx));\n        }\n        return comment;\n    }\n    createText(value) {\n        const text = this.delegate.createText(value);\n        const debugCtx = this.createDebugContext(text);\n        if (debugCtx) {\n            indexDebugNode(new DebugNode__PRE_R3__(text, null, debugCtx));\n        }\n        return text;\n    }\n    appendChild(parent, newChild) {\n        const debugEl = getDebugNode$1(parent);\n        const debugChildEl = getDebugNode$1(newChild);\n        if (debugEl && debugChildEl && debugEl instanceof DebugElement__PRE_R3__) {\n            debugEl.addChild(debugChildEl);\n        }\n        this.delegate.appendChild(parent, newChild);\n    }\n    insertBefore(parent, newChild, refChild) {\n        const debugEl = getDebugNode$1(parent);\n        const debugChildEl = getDebugNode$1(newChild);\n        const debugRefEl = getDebugNode$1(refChild);\n        if (debugEl && debugChildEl && debugEl instanceof DebugElement__PRE_R3__) {\n            debugEl.insertBefore(debugRefEl, debugChildEl);\n        }\n        this.delegate.insertBefore(parent, newChild, refChild);\n    }\n    removeChild(parent, oldChild) {\n        const debugEl = getDebugNode$1(parent);\n        const debugChildEl = getDebugNode$1(oldChild);\n        if (debugEl && debugChildEl && debugEl instanceof DebugElement__PRE_R3__) {\n            debugEl.removeChild(debugChildEl);\n        }\n        this.delegate.removeChild(parent, oldChild);\n    }\n    selectRootElement(selectorOrNode, preserveContent) {\n        const el = this.delegate.selectRootElement(selectorOrNode, preserveContent);\n        const debugCtx = getCurrentDebugContext();\n        if (debugCtx) {\n            indexDebugNode(new DebugElement__PRE_R3__(el, null, debugCtx));\n        }\n        return el;\n    }\n    setAttribute(el, name, value, namespace) {\n        const debugEl = getDebugNode$1(el);\n        if (debugEl && debugEl instanceof DebugElement__PRE_R3__) {\n            const fullName = namespace ? namespace + ':' + name : name;\n            debugEl.attributes[fullName] = value;\n        }\n        this.delegate.setAttribute(el, name, value, namespace);\n    }\n    removeAttribute(el, name, namespace) {\n        const debugEl = getDebugNode$1(el);\n        if (debugEl && debugEl instanceof DebugElement__PRE_R3__) {\n            const fullName = namespace ? namespace + ':' + name : name;\n            debugEl.attributes[fullName] = null;\n        }\n        this.delegate.removeAttribute(el, name, namespace);\n    }\n    addClass(el, name) {\n        const debugEl = getDebugNode$1(el);\n        if (debugEl && debugEl instanceof DebugElement__PRE_R3__) {\n            debugEl.classes[name] = true;\n        }\n        this.delegate.addClass(el, name);\n    }\n    removeClass(el, name) {\n        const debugEl = getDebugNode$1(el);\n        if (debugEl && debugEl instanceof DebugElement__PRE_R3__) {\n            debugEl.classes[name] = false;\n        }\n        this.delegate.removeClass(el, name);\n    }\n    setStyle(el, style, value, flags) {\n        const debugEl = getDebugNode$1(el);\n        if (debugEl && debugEl instanceof DebugElement__PRE_R3__) {\n            debugEl.styles[style] = value;\n        }\n        this.delegate.setStyle(el, style, value, flags);\n    }\n    removeStyle(el, style, flags) {\n        const debugEl = getDebugNode$1(el);\n        if (debugEl && debugEl instanceof DebugElement__PRE_R3__) {\n            debugEl.styles[style] = null;\n        }\n        this.delegate.removeStyle(el, style, flags);\n    }\n    setProperty(el, name, value) {\n        const debugEl = getDebugNode$1(el);\n        if (debugEl && debugEl instanceof DebugElement__PRE_R3__) {\n            debugEl.properties[name] = value;\n        }\n        this.delegate.setProperty(el, name, value);\n    }\n    listen(target, eventName, callback) {\n        if (typeof target !== 'string') {\n            const debugEl = getDebugNode$1(target);\n            if (debugEl) {\n                debugEl.listeners.push(new DebugEventListener(eventName, callback));\n            }\n        }\n        return this.delegate.listen(target, eventName, callback);\n    }\n    parentNode(node) {\n        return this.delegate.parentNode(node);\n    }\n    nextSibling(node) {\n        return this.delegate.nextSibling(node);\n    }\n    setValue(node, value) {\n        return this.delegate.setValue(node, value);\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction overrideProvider(override) {\n    initServicesIfNeeded();\n    return Services.overrideProvider(override);\n}\nfunction overrideComponentView(comp, componentFactory) {\n    initServicesIfNeeded();\n    return Services.overrideComponentView(comp, componentFactory);\n}\nfunction clearOverrides() {\n    initServicesIfNeeded();\n    return Services.clearOverrides();\n}\n// Attention: this function is called as top level function.\n// Putting any logic in here will destroy closure tree shaking!\nfunction createNgModuleFactory(ngModuleType, bootstrapComponents, defFactory) {\n    return new NgModuleFactory_(ngModuleType, bootstrapComponents, defFactory);\n}\nfunction cloneNgModuleDefinition(def) {\n    const providers = Array.from(def.providers);\n    const modules = Array.from(def.modules);\n    const providersByKey = {};\n    for (const key in def.providersByKey) {\n        providersByKey[key] = def.providersByKey[key];\n    }\n    return {\n        factory: def.factory,\n        scope: def.scope,\n        providers,\n        modules,\n        providersByKey,\n    };\n}\nclass NgModuleFactory_ extends NgModuleFactory {\n    constructor(moduleType, _bootstrapComponents, _ngModuleDefFactory) {\n        // Attention: this ctor is called as top level function.\n        // Putting any logic in here will destroy closure tree shaking!\n        super();\n        this.moduleType = moduleType;\n        this._bootstrapComponents = _bootstrapComponents;\n        this._ngModuleDefFactory = _ngModuleDefFactory;\n    }\n    create(parentInjector) {\n        initServicesIfNeeded();\n        // Clone the NgModuleDefinition so that any tree shakeable provider definition\n        // added to this instance of the NgModuleRef doesn't affect the cached copy.\n        // See https://github.com/angular/angular/issues/25018.\n        const def = cloneNgModuleDefinition(resolveDefinition(this._ngModuleDefFactory));\n        return Services.createNgModuleRef(this.moduleType, parentInjector || Injector.NULL, this._bootstrapComponents, def);\n    }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// clang-format on\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nif (ngDevMode) {\n    // This helper is to give a reasonable error message to people upgrading to v9 that have not yet\n    // installed `@angular/localize` in their app.\n    // tslint:disable-next-line: no-toplevel-property-access\n    _global.$localize = _global.$localize || function () {\n        throw new Error('It looks like your application or one of its dependencies is using i18n.\\n' +\n            'Angular 9 introduced a global `$localize()` function that needs to be loaded.\\n' +\n            'Please run `ng add @angular/localize` from the Angular CLI.\\n' +\n            '(For non-CLI projects, add `import \\'@angular/localize/init\\';` to your `polyfills.ts` file.\\n' +\n            'For server-side rendering applications add the import to your `main.server.ts` file.)');\n    };\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// This file only reexports content of the `src` folder. Keep it that way.\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { ANALYZE_FOR_ENTRY_COMPONENTS, APP_BOOTSTRAP_LISTENER, APP_ID, APP_INITIALIZER, ApplicationInitStatus, ApplicationModule, ApplicationRef, Attribute, COMPILER_OPTIONS, CUSTOM_ELEMENTS_SCHEMA, ChangeDetectionStrategy, ChangeDetectorRef, Compiler, CompilerFactory, Component, ComponentFactory, ComponentFactoryResolver, ComponentRef, ContentChild, ContentChildren, DEFAULT_CURRENCY_CODE, DebugElement, DebugEventListener, DebugNode, DefaultIterableDiffer, Directive, ElementRef, EmbeddedViewRef, ErrorHandler, EventEmitter, Host, HostBinding, HostListener, INJECTOR, Inject, InjectFlags, Injectable, InjectionToken, Injector, Input, IterableDiffers, KeyValueDiffers, LOCALE_ID$1 as LOCALE_ID, MissingTranslationStrategy, ModuleWithComponentFactories, NO_ERRORS_SCHEMA, NgModule, NgModuleFactory, NgModuleFactoryLoader, NgModuleRef, NgProbeToken, NgZone, Optional, Output, PACKAGE_ROOT_URL, PLATFORM_ID, PLATFORM_INITIALIZER, Pipe, PlatformRef, Query, QueryList, ReflectiveInjector, ReflectiveKey, Renderer2, RendererFactory2, RendererStyleFlags2, ResolvedReflectiveFactory, Sanitizer, SecurityContext, Self, SimpleChange, SkipSelf, SystemJsNgModuleLoader, SystemJsNgModuleLoaderConfig, TRANSLATIONS, TRANSLATIONS_FORMAT, TemplateRef, Testability, TestabilityRegistry, Type, VERSION, Version, ViewChild, ViewChildren, ViewContainerRef, ViewEncapsulation$1 as ViewEncapsulation, ViewRef$1 as ViewRef, WrappedValue, asNativeElements, assertPlatform, createPlatform, createPlatformFactory, defineInjectable, destroyPlatform, enableProdMode, forwardRef, getDebugNode$1 as getDebugNode, getModuleFactory, getPlatform, inject, isDevMode, platformCore, resolveForwardRef, setTestabilityGetter, ɵ0, ɵ1, ALLOW_MULTIPLE_PLATFORMS as ɵALLOW_MULTIPLE_PLATFORMS, APP_ID_RANDOM_PROVIDER as ɵAPP_ID_RANDOM_PROVIDER, ChangeDetectorStatus as ɵChangeDetectorStatus, CodegenComponentFactoryResolver as ɵCodegenComponentFactoryResolver, Compiler_compileModuleAndAllComponentsAsync__POST_R3__ as ɵCompiler_compileModuleAndAllComponentsAsync__POST_R3__, Compiler_compileModuleAndAllComponentsSync__POST_R3__ as ɵCompiler_compileModuleAndAllComponentsSync__POST_R3__, Compiler_compileModuleAsync__POST_R3__ as ɵCompiler_compileModuleAsync__POST_R3__, Compiler_compileModuleSync__POST_R3__ as ɵCompiler_compileModuleSync__POST_R3__, ComponentFactory as ɵComponentFactory, Console as ɵConsole, DEFAULT_LOCALE_ID as ɵDEFAULT_LOCALE_ID, EMPTY_ARRAY$4 as ɵEMPTY_ARRAY, EMPTY_MAP as ɵEMPTY_MAP, INJECTOR_IMPL__POST_R3__ as ɵINJECTOR_IMPL__POST_R3__, INJECTOR_SCOPE as ɵINJECTOR_SCOPE, LifecycleHooksFeature as ɵLifecycleHooksFeature, LocaleDataIndex as ɵLocaleDataIndex, NG_COMP_DEF as ɵNG_COMP_DEF, NG_DIR_DEF as ɵNG_DIR_DEF, NG_ELEMENT_ID as ɵNG_ELEMENT_ID, NG_INJ_DEF as ɵNG_INJ_DEF, NG_MOD_DEF as ɵNG_MOD_DEF, NG_PIPE_DEF as ɵNG_PIPE_DEF, NG_PROV_DEF as ɵNG_PROV_DEF, NOT_FOUND_CHECK_ONLY_ELEMENT_INJECTOR as ɵNOT_FOUND_CHECK_ONLY_ELEMENT_INJECTOR, NO_CHANGE as ɵNO_CHANGE, NgModuleFactory$1 as ɵNgModuleFactory, NoopNgZone as ɵNoopNgZone, ReflectionCapabilities as ɵReflectionCapabilities, ComponentFactory$1 as ɵRender3ComponentFactory, ComponentRef$1 as ɵRender3ComponentRef, NgModuleRef$1 as ɵRender3NgModuleRef, SWITCH_CHANGE_DETECTOR_REF_FACTORY__POST_R3__ as ɵSWITCH_CHANGE_DETECTOR_REF_FACTORY__POST_R3__, SWITCH_COMPILE_COMPONENT__POST_R3__ as ɵSWITCH_COMPILE_COMPONENT__POST_R3__, SWITCH_COMPILE_DIRECTIVE__POST_R3__ as ɵSWITCH_COMPILE_DIRECTIVE__POST_R3__, SWITCH_COMPILE_INJECTABLE__POST_R3__ as ɵSWITCH_COMPILE_INJECTABLE__POST_R3__, SWITCH_COMPILE_NGMODULE__POST_R3__ as ɵSWITCH_COMPILE_NGMODULE__POST_R3__, SWITCH_COMPILE_PIPE__POST_R3__ as ɵSWITCH_COMPILE_PIPE__POST_R3__, SWITCH_ELEMENT_REF_FACTORY__POST_R3__ as ɵSWITCH_ELEMENT_REF_FACTORY__POST_R3__, SWITCH_IVY_ENABLED__POST_R3__ as ɵSWITCH_IVY_ENABLED__POST_R3__, SWITCH_RENDERER2_FACTORY__POST_R3__ as ɵSWITCH_RENDERER2_FACTORY__POST_R3__, SWITCH_TEMPLATE_REF_FACTORY__POST_R3__ as ɵSWITCH_TEMPLATE_REF_FACTORY__POST_R3__, SWITCH_VIEW_CONTAINER_REF_FACTORY__POST_R3__ as ɵSWITCH_VIEW_CONTAINER_REF_FACTORY__POST_R3__, _sanitizeHtml as ɵ_sanitizeHtml, _sanitizeUrl as ɵ_sanitizeUrl, allowSanitizationBypassAndThrow as ɵallowSanitizationBypassAndThrow, anchorDef as ɵand, isForwardRef as ɵangular_packages_core_core_a, injectInjectorOnly as ɵangular_packages_core_core_b, instructionState as ɵangular_packages_core_core_ba, getLView as ɵangular_packages_core_core_bb, getPreviousOrParentTNode as ɵangular_packages_core_core_bc, getBindingRoot as ɵangular_packages_core_core_bd, nextContextImpl as ɵangular_packages_core_core_be, pureFunction1Internal as ɵangular_packages_core_core_bg, pureFunction2Internal as ɵangular_packages_core_core_bh, pureFunction3Internal as ɵangular_packages_core_core_bi, pureFunction4Internal as ɵangular_packages_core_core_bj, pureFunctionVInternal as ɵangular_packages_core_core_bk, getUrlSanitizer as ɵangular_packages_core_core_bl, makeParamDecorator as ɵangular_packages_core_core_bm, makePropDecorator as ɵangular_packages_core_core_bn, getClosureSafeProperty as ɵangular_packages_core_core_bo, getRootContext as ɵangular_packages_core_core_bq, i18nPostprocess as ɵangular_packages_core_core_br, NullInjector as ɵangular_packages_core_core_c, ReflectiveInjector_ as ɵangular_packages_core_core_d, ReflectiveDependency as ɵangular_packages_core_core_e, resolveReflectiveProviders as ɵangular_packages_core_core_f, _appIdRandomProviderFactory as ɵangular_packages_core_core_g, createElementRef as ɵangular_packages_core_core_h, createTemplateRef as ɵangular_packages_core_core_i, getModuleFactory__PRE_R3__ as ɵangular_packages_core_core_j, DebugNode__PRE_R3__ as ɵangular_packages_core_core_k, DebugElement__PRE_R3__ as ɵangular_packages_core_core_l, getDebugNodeR2__PRE_R3__ as ɵangular_packages_core_core_m, DefaultIterableDifferFactory as ɵangular_packages_core_core_n, DefaultKeyValueDifferFactory as ɵangular_packages_core_core_o, _iterableDiffersFactory as ɵangular_packages_core_core_p, _keyValueDiffersFactory as ɵangular_packages_core_core_q, _localeFactory as ɵangular_packages_core_core_r, APPLICATION_MODULE_PROVIDERS as ɵangular_packages_core_core_s, zoneSchedulerFactory as ɵangular_packages_core_core_t, USD_CURRENCY_CODE as ɵangular_packages_core_core_u, _def as ɵangular_packages_core_core_v, DebugContext as ɵangular_packages_core_core_w, NgOnChangesFeatureImpl as ɵangular_packages_core_core_x, SCHEDULER as ɵangular_packages_core_core_y, injectAttributeImpl as ɵangular_packages_core_core_z, bypassSanitizationTrustHtml as ɵbypassSanitizationTrustHtml, bypassSanitizationTrustResourceUrl as ɵbypassSanitizationTrustResourceUrl, bypassSanitizationTrustScript as ɵbypassSanitizationTrustScript, bypassSanitizationTrustStyle as ɵbypassSanitizationTrustStyle, bypassSanitizationTrustUrl as ɵbypassSanitizationTrustUrl, createComponentFactory as ɵccf, clearOverrides as ɵclearOverrides, clearResolutionOfComponentResourcesQueue as ɵclearResolutionOfComponentResourcesQueue, createNgModuleFactory as ɵcmf, compileComponent as ɵcompileComponent, compileDirective as ɵcompileDirective, compileNgModule as ɵcompileNgModule, compileNgModuleDefs as ɵcompileNgModuleDefs, compileNgModuleFactory__POST_R3__ as ɵcompileNgModuleFactory__POST_R3__, compilePipe as ɵcompilePipe, createInjector as ɵcreateInjector, createRendererType2 as ɵcrt, defaultIterableDiffers as ɵdefaultIterableDiffers, defaultKeyValueDiffers as ɵdefaultKeyValueDiffers, detectChanges as ɵdetectChanges, devModeEqual as ɵdevModeEqual, directiveDef as ɵdid, elementDef as ɵeld, findLocaleData as ɵfindLocaleData, flushModuleScopingQueueAsMuchAsPossible as ɵflushModuleScopingQueueAsMuchAsPossible, getComponentViewDefinitionFactory as ɵgetComponentViewDefinitionFactory, getDebugNodeR2 as ɵgetDebugNodeR2, getDebugNode__POST_R3__ as ɵgetDebugNode__POST_R3__, getDirectives as ɵgetDirectives, getHostElement as ɵgetHostElement, getInjectableDef as ɵgetInjectableDef, getLContext as ɵgetLContext, getLocaleCurrencyCode as ɵgetLocaleCurrencyCode, getLocalePluralCase as ɵgetLocalePluralCase, getModuleFactory__POST_R3__ as ɵgetModuleFactory__POST_R3__, getSanitizationBypassType as ɵgetSanitizationBypassType, _global as ɵglobal, initServicesIfNeeded as ɵinitServicesIfNeeded, inlineInterpolate as ɵinlineInterpolate, interpolate as ɵinterpolate, isBoundToModule__POST_R3__ as ɵisBoundToModule__POST_R3__, isDefaultChangeDetectionStrategy as ɵisDefaultChangeDetectionStrategy, isListLikeIterable as ɵisListLikeIterable, isObservable as ɵisObservable, isPromise as ɵisPromise, ivyEnabled as ɵivyEnabled, makeDecorator as ɵmakeDecorator, markDirty as ɵmarkDirty, moduleDef as ɵmod, moduleProvideDef as ɵmpd, ngContentDef as ɵncd, noSideEffects as ɵnoSideEffects, nodeValue as ɵnov, overrideComponentView as ɵoverrideComponentView, overrideProvider as ɵoverrideProvider, pureArrayDef as ɵpad, patchComponentDefWithScope as ɵpatchComponentDefWithScope, pipeDef as ɵpid, pureObjectDef as ɵpod, purePipeDef as ɵppd, providerDef as ɵprd, publishDefaultGlobalUtils as ɵpublishDefaultGlobalUtils, publishGlobalUtil as ɵpublishGlobalUtil, queryDef as ɵqud, registerLocaleData as ɵregisterLocaleData, registerModuleFactory as ɵregisterModuleFactory, registerNgModuleType as ɵregisterNgModuleType, renderComponent$1 as ɵrenderComponent, resetCompiledComponents as ɵresetCompiledComponents, resetJitOptions as ɵresetJitOptions, resolveComponentResources as ɵresolveComponentResources, setClassMetadata as ɵsetClassMetadata, setCurrentInjector as ɵsetCurrentInjector, setDocument as ɵsetDocument, setLocaleId as ɵsetLocaleId, store as ɵstore, stringify as ɵstringify, textDef as ɵted, transitiveScopesFor as ɵtransitiveScopesFor, unregisterAllLocaleData as ɵunregisterLocaleData, unwrapValue as ɵunv, unwrapSafeValue as ɵunwrapSafeValue, viewDef as ɵvid, whenRendered as ɵwhenRendered, ɵɵCopyDefinitionFeature, ɵɵInheritDefinitionFeature, ɵɵNgOnChangesFeature, ɵɵProvidersFeature, ɵɵadvance, ɵɵattribute, ɵɵattributeInterpolate1, ɵɵattributeInterpolate2, ɵɵattributeInterpolate3, ɵɵattributeInterpolate4, ɵɵattributeInterpolate5, ɵɵattributeInterpolate6, ɵɵattributeInterpolate7, ɵɵattributeInterpolate8, ɵɵattributeInterpolateV, ɵɵclassMap, ɵɵclassMapInterpolate1, ɵɵclassMapInterpolate2, ɵɵclassMapInterpolate3, ɵɵclassMapInterpolate4, ɵɵclassMapInterpolate5, ɵɵclassMapInterpolate6, ɵɵclassMapInterpolate7, ɵɵclassMapInterpolate8, ɵɵclassMapInterpolateV, ɵɵclassProp, ɵɵcontentQuery, ɵɵdefineComponent, ɵɵdefineDirective, ɵɵdefineInjectable, ɵɵdefineInjector, ɵɵdefineNgModule, ɵɵdefinePipe, ɵɵdirectiveInject, ɵɵdisableBindings, ɵɵelement, ɵɵelementContainer, ɵɵelementContainerEnd, ɵɵelementContainerStart, ɵɵelementEnd, ɵɵelementStart, ɵɵenableBindings, ɵɵgetCurrentView, ɵɵgetFactoryOf, ɵɵgetInheritedFactory, ɵɵhostProperty, ɵɵi18n, ɵɵi18nApply, ɵɵi18nAttributes, ɵɵi18nEnd, ɵɵi18nExp, ɵɵi18nPostprocess, ɵɵi18nStart, ɵɵinject, ɵɵinjectAttribute, ɵɵinjectPipeChangeDetectorRef, ɵɵinvalidFactory, ɵɵinvalidFactoryDep, ɵɵlistener, ɵɵloadQuery, ɵɵnamespaceHTML, ɵɵnamespaceMathML, ɵɵnamespaceSVG, ɵɵnextContext, ɵɵpipe, ɵɵpipeBind1, ɵɵpipeBind2, ɵɵpipeBind3, ɵɵpipeBind4, ɵɵpipeBindV, ɵɵprojection, ɵɵprojectionDef, ɵɵproperty, ɵɵpropertyInterpolate, ɵɵpropertyInterpolate1, ɵɵpropertyInterpolate2, ɵɵpropertyInterpolate3, ɵɵpropertyInterpolate4, ɵɵpropertyInterpolate5, ɵɵpropertyInterpolate6, ɵɵpropertyInterpolate7, ɵɵpropertyInterpolate8, ɵɵpropertyInterpolateV, ɵɵpureFunction0, ɵɵpureFunction1, ɵɵpureFunction2, ɵɵpureFunction3, ɵɵpureFunction4, ɵɵpureFunction5, ɵɵpureFunction6, ɵɵpureFunction7, ɵɵpureFunction8, ɵɵpureFunctionV, ɵɵqueryRefresh, ɵɵreference, ɵɵresolveBody, ɵɵresolveDocument, ɵɵresolveWindow, ɵɵrestoreView, ɵɵsanitizeHtml, ɵɵsanitizeResourceUrl, ɵɵsanitizeScript, ɵɵsanitizeStyle, ɵɵsanitizeUrl, ɵɵsanitizeUrlOrResourceUrl, ɵɵsetComponentScope, ɵɵsetNgModuleScope, ɵɵstaticContentQuery, ɵɵstaticViewQuery, ɵɵstyleMap, ɵɵstyleMapInterpolate1, ɵɵstyleMapInterpolate2, ɵɵstyleMapInterpolate3, ɵɵstyleMapInterpolate4, ɵɵstyleMapInterpolate5, ɵɵstyleMapInterpolate6, ɵɵstyleMapInterpolate7, ɵɵstyleMapInterpolate8, ɵɵstyleMapInterpolateV, ɵɵstyleProp, ɵɵstylePropInterpolate1, ɵɵstylePropInterpolate2, ɵɵstylePropInterpolate3, ɵɵstylePropInterpolate4, ɵɵstylePropInterpolate5, ɵɵstylePropInterpolate6, ɵɵstylePropInterpolate7, ɵɵstylePropInterpolate8, ɵɵstylePropInterpolateV, ɵɵsyntheticHostListener, ɵɵsyntheticHostProperty, ɵɵtemplate, ɵɵtemplateRefExtractor, ɵɵtext, ɵɵtextInterpolate, ɵɵtextInterpolate1, ɵɵtextInterpolate2, ɵɵtextInterpolate3, ɵɵtextInterpolate4, ɵɵtextInterpolate5, ɵɵtextInterpolate6, ɵɵtextInterpolate7, ɵɵtextInterpolate8, ɵɵtextInterpolateV, ɵɵviewQuery };\n\n//# sourceMappingURL=core.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\n/* tslint:enable:max-line-length */\n/**\n * @param observables\n * @return {Observable<R>}\n * @method zip\n * @owner Observable\n */\nfunction zipProto() {\n    var observables = [];\n    for (var _i = 0; _i < arguments.length; _i++) {\n        observables[_i] = arguments[_i];\n    }\n    return this.lift.call(rxjs_1.zip.apply(void 0, [this].concat(observables)));\n}\nexports.zipProto = zipProto;\n//# sourceMappingURL=zip.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nrequire(\"rxjs-compat/add/operator/filter\");\n//# sourceMappingURL=filter.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.from = rxjs_1.from;\n//# sourceMappingURL=from.js.map","export default function _getPrototypeOf(o) {\n  _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {\n    return o.__proto__ || Object.getPrototypeOf(o);\n  };\n  return _getPrototypeOf(o);\n}","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar min_1 = require(\"../../operator/min\");\nrxjs_1.Observable.prototype.min = min_1.min;\n//# sourceMappingURL=min.js.map","import { config } from './config';\nimport { hostReportError } from './util/hostReportError';\nexport const empty = {\n    closed: true,\n    next(value) { },\n    error(err) {\n        if (config.useDeprecatedSynchronousErrorHandling) {\n            throw err;\n        }\n        else {\n            hostReportError(err);\n        }\n    },\n    complete() { }\n};\n//# sourceMappingURL=Observer.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar startWith_1 = require(\"../../operator/startWith\");\nrxjs_1.Observable.prototype.startWith = startWith_1.startWith;\n//# sourceMappingURL=startWith.js.map","import { Subscriber } from '../Subscriber';\nimport { async } from '../scheduler/async';\nimport { defaultThrottleConfig } from './throttle';\nexport function throttleTime(duration, scheduler = async, config = defaultThrottleConfig) {\n    return (source) => source.lift(new ThrottleTimeOperator(duration, scheduler, config.leading, config.trailing));\n}\nclass ThrottleTimeOperator {\n    constructor(duration, scheduler, leading, trailing) {\n        this.duration = duration;\n        this.scheduler = scheduler;\n        this.leading = leading;\n        this.trailing = trailing;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new ThrottleTimeSubscriber(subscriber, this.duration, this.scheduler, this.leading, this.trailing));\n    }\n}\nclass ThrottleTimeSubscriber extends Subscriber {\n    constructor(destination, duration, scheduler, leading, trailing) {\n        super(destination);\n        this.duration = duration;\n        this.scheduler = scheduler;\n        this.leading = leading;\n        this.trailing = trailing;\n        this._hasTrailingValue = false;\n        this._trailingValue = null;\n    }\n    _next(value) {\n        if (this.throttled) {\n            if (this.trailing) {\n                this._trailingValue = value;\n                this._hasTrailingValue = true;\n            }\n        }\n        else {\n            this.add(this.throttled = this.scheduler.schedule(dispatchNext, this.duration, { subscriber: this }));\n            if (this.leading) {\n                this.destination.next(value);\n            }\n            else if (this.trailing) {\n                this._trailingValue = value;\n                this._hasTrailingValue = true;\n            }\n        }\n    }\n    _complete() {\n        if (this._hasTrailingValue) {\n            this.destination.next(this._trailingValue);\n            this.destination.complete();\n        }\n        else {\n            this.destination.complete();\n        }\n    }\n    clearThrottle() {\n        const throttled = this.throttled;\n        if (throttled) {\n            if (this.trailing && this._hasTrailingValue) {\n                this.destination.next(this._trailingValue);\n                this._trailingValue = null;\n                this._hasTrailingValue = false;\n            }\n            throttled.unsubscribe();\n            this.remove(throttled);\n            this.throttled = null;\n        }\n    }\n}\nfunction dispatchNext(arg) {\n    const { subscriber } = arg;\n    subscriber.clearThrottle();\n}\n//# sourceMappingURL=throttleTime.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Counts the number of emissions on the source and emits that number when the\n * source completes.\n *\n * <span class=\"informal\">Tells how many values were emitted, when the source\n * completes.</span>\n *\n * <img src=\"./img/count.png\" width=\"100%\">\n *\n * `count` transforms an Observable that emits values into an Observable that\n * emits a single value that represents the number of values emitted by the\n * source Observable. If the source Observable terminates with an error, `count`\n * will pass this error notification along without emitting a value first. If\n * the source Observable does not terminate at all, `count` will neither emit\n * a value nor terminate. This operator takes an optional `predicate` function\n * as argument, in which case the output emission will represent the number of\n * source values that matched `true` with the `predicate`.\n *\n * @example <caption>Counts how many seconds have passed before the first click happened</caption>\n * var seconds = Rx.Observable.interval(1000);\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var secondsBeforeClick = seconds.takeUntil(clicks);\n * var result = secondsBeforeClick.count();\n * result.subscribe(x => console.log(x));\n *\n * @example <caption>Counts how many odd numbers are there between 1 and 7</caption>\n * var numbers = Rx.Observable.range(1, 7);\n * var result = numbers.count(i => i % 2 === 1);\n * result.subscribe(x => console.log(x));\n *\n * // Results in:\n * // 4\n *\n * @see {@link max}\n * @see {@link min}\n * @see {@link reduce}\n *\n * @param {function(value: T, i: number, source: Observable<T>): boolean} [predicate] A\n * boolean function to select what values are to be counted. It is provided with\n * arguments of:\n * - `value`: the value from the source Observable.\n * - `index`: the (zero-based) \"index\" of the value from the source Observable.\n * - `source`: the source Observable instance itself.\n * @return {Observable} An Observable of one number that represents the count as\n * described above.\n * @method count\n * @owner Observable\n */\nfunction count(predicate) {\n    return operators_1.count(predicate)(this);\n}\nexports.count = count;\n//# sourceMappingURL=count.js.map","import { Observable } from '../Observable';\nimport { Subscription } from '../Subscription';\nexport function pairs(obj, scheduler) {\n    if (!scheduler) {\n        return new Observable(subscriber => {\n            const keys = Object.keys(obj);\n            for (let i = 0; i < keys.length && !subscriber.closed; i++) {\n                const key = keys[i];\n                if (obj.hasOwnProperty(key)) {\n                    subscriber.next([key, obj[key]]);\n                }\n            }\n            subscriber.complete();\n        });\n    }\n    else {\n        return new Observable(subscriber => {\n            const keys = Object.keys(obj);\n            const subscription = new Subscription();\n            subscription.add(scheduler.schedule(dispatch, 0, { keys, index: 0, subscriber, subscription, obj }));\n            return subscription;\n        });\n    }\n}\nexport function dispatch(state) {\n    const { keys, index, subscriber, subscription, obj } = state;\n    if (!subscriber.closed) {\n        if (index < keys.length) {\n            const key = keys[index];\n            subscriber.next([key, obj[key]]);\n            subscription.add(this.schedule({ keys, index: index + 1, subscriber, subscription, obj }));\n        }\n        else {\n            subscriber.complete();\n        }\n    }\n}\n//# sourceMappingURL=pairs.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar bufferTime_1 = require(\"../../operator/bufferTime\");\nrxjs_1.Observable.prototype.bufferTime = bufferTime_1.bufferTime;\n//# sourceMappingURL=bufferTime.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar filter_1 = require(\"../../operator/filter\");\nrxjs_1.Observable.prototype.filter = filter_1.filter;\n//# sourceMappingURL=filter.js.map","export class SubscriptionLog {\n    constructor(subscribedFrame, unsubscribedFrame = Number.POSITIVE_INFINITY) {\n        this.subscribedFrame = subscribedFrame;\n        this.unsubscribedFrame = unsubscribedFrame;\n    }\n}\n//# sourceMappingURL=SubscriptionLog.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Projects each source value to an Observable which is merged in the output\n * Observable.\n *\n * <span class=\"informal\">Maps each value to an Observable, then flattens all of\n * these inner Observables using {@link mergeAll}.</span>\n *\n * <img src=\"./img/mergeMap.png\" width=\"100%\">\n *\n * Returns an Observable that emits items based on applying a function that you\n * supply to each item emitted by the source Observable, where that function\n * returns an Observable, and then merging those resulting Observables and\n * emitting the results of this merger.\n *\n * @example <caption>Map and flatten each letter to an Observable ticking every 1 second</caption>\n * var letters = Rx.Observable.of('a', 'b', 'c');\n * var result = letters.mergeMap(x =>\n *   Rx.Observable.interval(1000).map(i => x+i)\n * );\n * result.subscribe(x => console.log(x));\n *\n * // Results in the following:\n * // a0\n * // b0\n * // c0\n * // a1\n * // b1\n * // c1\n * // continues to list a,b,c with respective ascending integers\n *\n * @see {@link concatMap}\n * @see {@link exhaustMap}\n * @see {@link merge}\n * @see {@link mergeAll}\n * @see {@link mergeMapTo}\n * @see {@link mergeScan}\n * @see {@link switchMap}\n *\n * @param {function(value: T, ?index: number): ObservableInput} project A function\n * that, when applied to an item emitted by the source Observable, returns an\n * Observable.\n * @param {number} [concurrent=Number.POSITIVE_INFINITY] Maximum number of input\n * Observables being subscribed to concurrently.\n * @return {Observable} An Observable that emits the result of applying the\n * projection function (and the optional `resultSelector`) to each item emitted\n * by the source Observable and merging the results of the Observables obtained\n * from this transformation.\n * @method mergeMap\n * @owner Observable\n */\nfunction mergeMap(project, concurrent) {\n    if (concurrent === void 0) { concurrent = Number.POSITIVE_INFINITY; }\n    return operators_1.mergeMap(project, concurrent)(this);\n}\nexports.mergeMap = mergeMap;\n//# sourceMappingURL=mergeMap.js.map","import { AsyncAction } from './AsyncAction';\nimport { AsyncScheduler } from './AsyncScheduler';\nexport class VirtualTimeScheduler extends AsyncScheduler {\n    constructor(SchedulerAction = VirtualAction, maxFrames = Number.POSITIVE_INFINITY) {\n        super(SchedulerAction, () => this.frame);\n        this.maxFrames = maxFrames;\n        this.frame = 0;\n        this.index = -1;\n    }\n    flush() {\n        const { actions, maxFrames } = this;\n        let error, action;\n        while ((action = actions[0]) && action.delay <= maxFrames) {\n            actions.shift();\n            this.frame = action.delay;\n            if (error = action.execute(action.state, action.delay)) {\n                break;\n            }\n        }\n        if (error) {\n            while (action = actions.shift()) {\n                action.unsubscribe();\n            }\n            throw error;\n        }\n    }\n}\nVirtualTimeScheduler.frameTimeFactor = 10;\nexport class VirtualAction extends AsyncAction {\n    constructor(scheduler, work, index = scheduler.index += 1) {\n        super(scheduler, work);\n        this.scheduler = scheduler;\n        this.work = work;\n        this.index = index;\n        this.active = true;\n        this.index = scheduler.index = index;\n    }\n    schedule(state, delay = 0) {\n        if (!this.id) {\n            return super.schedule(state, delay);\n        }\n        this.active = false;\n        const action = new VirtualAction(this.scheduler, this.work);\n        this.add(action);\n        return action.schedule(state, delay);\n    }\n    requestAsyncId(scheduler, id, delay = 0) {\n        this.delay = scheduler.frame + delay;\n        const { actions } = scheduler;\n        actions.push(this);\n        actions.sort(VirtualAction.sortActions);\n        return true;\n    }\n    recycleAsyncId(scheduler, id, delay = 0) {\n        return undefined;\n    }\n    _execute(state, delay) {\n        if (this.active === true) {\n            return super._execute(state, delay);\n        }\n    }\n    static sortActions(a, b) {\n        if (a.delay === b.delay) {\n            if (a.index === b.index) {\n                return 0;\n            }\n            else if (a.index > b.index) {\n                return 1;\n            }\n            else {\n                return -1;\n            }\n        }\n        else if (a.delay > b.delay) {\n            return 1;\n        }\n        else {\n            return -1;\n        }\n    }\n}\n//# sourceMappingURL=VirtualTimeScheduler.js.map","var superPropBase = require(\"./superPropBase\");\n\nfunction _get(target, property, receiver) {\n  if (typeof Reflect !== \"undefined\" && Reflect.get) {\n    module.exports = _get = Reflect.get;\n  } else {\n    module.exports = _get = function _get(target, property, receiver) {\n      var base = superPropBase(target, property);\n      if (!base) return;\n      var desc = Object.getOwnPropertyDescriptor(base, property);\n\n      if (desc.get) {\n        return desc.get.call(receiver);\n      }\n\n      return desc.value;\n    };\n  }\n\n  return _get(target, property, receiver || target);\n}\n\nmodule.exports = _get;","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/** @docs-private */\nexport function createMissingDateImplError(provider: string) {\n  return Error(\n      `MatDatepicker: No provider found for ${provider}. You must import one of the following ` +\n      `modules at your application root: MatNativeDateModule, MatMomentDateModule, or provide a ` +\n      `custom implementation.`);\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable} from '@angular/core';\nimport {Subject} from 'rxjs';\n\n\n/** Datepicker data that requires internationalization. */\n@Injectable({providedIn: 'root'})\nexport class MatDatepickerIntl {\n  /**\n   * Stream that emits whenever the labels here are changed. Use this to notify\n   * components if the labels have changed after initialization.\n   */\n  readonly changes: Subject<void> = new Subject<void>();\n\n  /** A label for the calendar popup (used by screen readers). */\n  calendarLabel: string = 'Calendar';\n\n  /** A label for the button used to open the calendar popup (used by screen readers). */\n  openCalendarLabel: string = 'Open calendar';\n\n  /** A label for the previous month button (used by screen readers). */\n  prevMonthLabel: string = 'Previous month';\n\n  /** A label for the next month button (used by screen readers). */\n  nextMonthLabel: string = 'Next month';\n\n  /** A label for the previous year button (used by screen readers). */\n  prevYearLabel: string = 'Previous year';\n\n  /** A label for the next year button (used by screen readers). */\n  nextYearLabel: string = 'Next year';\n\n  /** A label for the previous multi-year button (used by screen readers). */\n  prevMultiYearLabel: string = 'Previous 20 years';\n\n  /** A label for the next multi-year button (used by screen readers). */\n  nextMultiYearLabel: string = 'Next 20 years';\n\n  /** A label for the 'switch to month view' button (used by screen readers). */\n  switchToMonthViewLabel: string = 'Choose date';\n\n  /** A label for the 'switch to year view' button (used by screen readers). */\n  switchToMultiYearViewLabel: string = 'Choose month and year';\n\n  /** Formats a range of years. */\n  formatYearRange(start: string, end: string): string {\n    return `${start} \\u2013 ${end}`;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  ChangeDetectionStrategy,\n  Component,\n  ElementRef,\n  EventEmitter,\n  Input,\n  Output,\n  ViewEncapsulation,\n  NgZone,\n  OnChanges,\n  SimpleChanges,\n  OnDestroy,\n} from '@angular/core';\nimport {take} from 'rxjs/operators';\n\n/** Extra CSS classes that can be associated with a calendar cell. */\nexport type MatCalendarCellCssClasses = string | string[] | Set<string> | {[key: string]: any};\n\n/** Function that can generate the extra classes that should be added to a calendar cell. */\nexport type MatCalendarCellClassFunction<D> =\n    (date: D, view: 'month' | 'year' | 'multi-year') => MatCalendarCellCssClasses;\n\n/**\n * An internal class that represents the data corresponding to a single calendar cell.\n * @docs-private\n */\nexport class MatCalendarCell<D = any> {\n  constructor(public value: number,\n              public displayValue: string,\n              public ariaLabel: string,\n              public enabled: boolean,\n              public cssClasses: MatCalendarCellCssClasses = {},\n              public compareValue = value,\n              public rawValue?: D) {}\n}\n\n/** Event emitted when a date inside the calendar is triggered as a result of a user action. */\nexport interface MatCalendarUserEvent<D> {\n  value: D;\n  event: Event;\n}\n\n/**\n * An internal component used to display calendar data in a table.\n * @docs-private\n */\n@Component({\n  selector: '[mat-calendar-body]',\n  templateUrl: 'calendar-body.html',\n  styleUrls: ['calendar-body.css'],\n  host: {\n    'class': 'mat-calendar-body',\n    'role': 'grid',\n    'aria-readonly': 'true'\n  },\n  exportAs: 'matCalendarBody',\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n})\nexport class MatCalendarBody implements OnChanges, OnDestroy {\n  /**\n   * Used to skip the next focus event when rendering the preview range.\n   * We need a flag like this, because some browsers fire focus events asynchronously.\n   */\n  private _skipNextFocus: boolean;\n\n  /** The label for the table. (e.g. \"Jan 2017\"). */\n  @Input() label: string;\n\n  /** The cells to display in the table. */\n  @Input() rows: MatCalendarCell[][];\n\n  /** The value in the table that corresponds to today. */\n  @Input() todayValue: number;\n\n  /** Start value of the selected date range. */\n  @Input() startValue: number;\n\n  /** End value of the selected date range. */\n  @Input() endValue: number;\n\n  /** The minimum number of free cells needed to fit the label in the first row. */\n  @Input() labelMinRequiredCells: number;\n\n  /** The number of columns in the table. */\n  @Input() numCols: number = 7;\n\n  /** The cell number of the active cell in the table. */\n  @Input() activeCell: number = 0;\n\n  /** Whether a range is being selected. */\n  @Input() isRange: boolean = false;\n\n  /**\n   * The aspect ratio (width / height) to use for the cells in the table. This aspect ratio will be\n   * maintained even as the table resizes.\n   */\n  @Input() cellAspectRatio: number = 1;\n\n  /** Start of the comparison range. */\n  @Input() comparisonStart: number | null;\n\n  /** End of the comparison range. */\n  @Input() comparisonEnd: number | null;\n\n  /** Start of the preview range. */\n  @Input() previewStart: number | null = null;\n\n  /** End of the preview range. */\n  @Input() previewEnd: number | null = null;\n\n  /** Emits when a new value is selected. */\n  @Output() readonly selectedValueChange: EventEmitter<MatCalendarUserEvent<number>> =\n      new EventEmitter<MatCalendarUserEvent<number>>();\n\n  /** Emits when the preview has changed as a result of a user action. */\n  @Output() previewChange = new EventEmitter<MatCalendarUserEvent<MatCalendarCell | null>>();\n\n  /** The number of blank cells to put at the beginning for the first row. */\n  _firstRowOffset: number;\n\n  /** Padding for the individual date cells. */\n  _cellPadding: string;\n\n  /** Width of an individual cell. */\n  _cellWidth: string;\n\n  constructor(private _elementRef: ElementRef<HTMLElement>, private _ngZone: NgZone) {\n    _ngZone.runOutsideAngular(() => {\n      const element = _elementRef.nativeElement;\n      element.addEventListener('mouseenter', this._enterHandler, true);\n      element.addEventListener('focus', this._enterHandler, true);\n      element.addEventListener('mouseleave', this._leaveHandler, true);\n      element.addEventListener('blur', this._leaveHandler, true);\n    });\n  }\n\n  /** Called when a cell is clicked. */\n  _cellClicked(cell: MatCalendarCell, event: MouseEvent): void {\n    if (cell.enabled) {\n      this.selectedValueChange.emit({value: cell.value, event});\n    }\n  }\n\n  /** Returns whether a cell should be marked as selected. */\n  _isSelected(value: number) {\n    return this.startValue === value || this.endValue === value;\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    const columnChanges = changes['numCols'];\n    const {rows, numCols} = this;\n\n    if (changes['rows'] || columnChanges) {\n      this._firstRowOffset = rows && rows.length && rows[0].length ? numCols - rows[0].length : 0;\n    }\n\n    if (changes['cellAspectRatio'] || columnChanges || !this._cellPadding) {\n      this._cellPadding = `${50 * this.cellAspectRatio / numCols}%`;\n    }\n\n    if (columnChanges || !this._cellWidth) {\n      this._cellWidth = `${100 / numCols}%`;\n    }\n  }\n\n  ngOnDestroy() {\n    const element = this._elementRef.nativeElement;\n    element.removeEventListener('mouseenter', this._enterHandler, true);\n    element.removeEventListener('focus', this._enterHandler, true);\n    element.removeEventListener('mouseleave', this._leaveHandler, true);\n    element.removeEventListener('blur', this._leaveHandler, true);\n  }\n\n  /** Returns whether a cell is active. */\n  _isActiveCell(rowIndex: number, colIndex: number): boolean {\n    let cellNumber = rowIndex * this.numCols + colIndex;\n\n    // Account for the fact that the first row may not have as many cells.\n    if (rowIndex) {\n      cellNumber -= this._firstRowOffset;\n    }\n\n    return cellNumber == this.activeCell;\n  }\n\n  /** Focuses the active cell after the microtask queue is empty. */\n  _focusActiveCell(movePreview = true) {\n    this._ngZone.runOutsideAngular(() => {\n      this._ngZone.onStable.pipe(take(1)).subscribe(() => {\n        const activeCell: HTMLElement | null =\n            this._elementRef.nativeElement.querySelector('.mat-calendar-body-active');\n\n        if (activeCell) {\n          if (!movePreview) {\n            this._skipNextFocus = true;\n          }\n\n          activeCell.focus();\n        }\n      });\n    });\n  }\n\n  /** Gets whether a value is the start of the main range. */\n  _isRangeStart(value: number) {\n    return isStart(value, this.startValue, this.endValue);\n  }\n\n  /** Gets whether a value is the end of the main range. */\n  _isRangeEnd(value: number) {\n    return isEnd(value, this.startValue, this.endValue);\n  }\n\n  /** Gets whether a value is within the currently-selected range. */\n  _isInRange(value: number): boolean {\n    return isInRange(value, this.startValue, this.endValue, this.isRange);\n  }\n\n  /** Gets whether a value is the start of the comparison range. */\n  _isComparisonStart(value: number) {\n    return isStart(value, this.comparisonStart, this.comparisonEnd);\n  }\n\n  /** Whether the cell is a start bridge cell between the main and comparison ranges. */\n  _isComparisonBridgeStart(value: number, rowIndex: number, colIndex: number) {\n    if (!this._isComparisonStart(value) || this._isRangeStart(value) || !this._isInRange(value)) {\n      return false;\n    }\n\n    let previousCell: MatCalendarCell | undefined = this.rows[rowIndex][colIndex - 1];\n\n    if (!previousCell) {\n      const previousRow = this.rows[rowIndex - 1];\n      previousCell = previousRow && previousRow[previousRow.length - 1];\n    }\n\n    return previousCell && !this._isRangeEnd(previousCell.compareValue);\n  }\n\n  /** Whether the cell is an end bridge cell between the main and comparison ranges. */\n  _isComparisonBridgeEnd(value: number, rowIndex: number, colIndex: number) {\n    if (!this._isComparisonEnd(value) || this._isRangeEnd(value) || !this._isInRange(value)) {\n      return false;\n    }\n\n    let nextCell: MatCalendarCell | undefined = this.rows[rowIndex][colIndex + 1];\n\n    if (!nextCell) {\n      const nextRow = this.rows[rowIndex + 1];\n      nextCell = nextRow && nextRow[0];\n    }\n\n    return nextCell && !this._isRangeStart(nextCell.compareValue);\n  }\n\n  /** Gets whether a value is the end of the comparison range. */\n  _isComparisonEnd(value: number) {\n    return isEnd(value, this.comparisonStart, this.comparisonEnd);\n  }\n\n  /** Gets whether a value is within the current comparison range. */\n  _isInComparisonRange(value: number) {\n    return isInRange(value, this.comparisonStart, this.comparisonEnd, this.isRange);\n  }\n\n  /**\n   * Gets whether a value is the same as the start and end of the comparison range.\n   * For context, the functions that we use to determine whether something is the start/end of\n   * a range don't allow for the start and end to be on the same day, because we'd have to use\n   * much more specific CSS selectors to style them correctly in all scenarios. This is fine for\n   * the regular range, because when it happens, the selected styles take over and still show where\n   * the range would've been, however we don't have these selected styles for a comparison range.\n   * This function is used to apply a class that serves the same purpose as the one for selected\n   * dates, but it only applies in the context of a comparison range.\n   */\n  _isComparisonIdentical(value: number) {\n    // Note that we don't need to null check the start/end\n    // here, because the `value` will always be defined.\n    return this.comparisonStart === this.comparisonEnd && value === this.comparisonStart;\n  }\n\n  /** Gets whether a value is the start of the preview range. */\n  _isPreviewStart(value: number) {\n    return isStart(value, this.previewStart, this.previewEnd);\n  }\n\n  /** Gets whether a value is the end of the preview range. */\n  _isPreviewEnd(value: number) {\n    return isEnd(value, this.previewStart, this.previewEnd);\n  }\n\n  /** Gets whether a value is inside the preview range. */\n  _isInPreview(value: number) {\n    return isInRange(value, this.previewStart, this.previewEnd, this.isRange);\n  }\n\n  /**\n   * Event handler for when the user enters an element\n   * inside the calendar body (e.g. by hovering in or focus).\n   */\n  private _enterHandler = (event: Event) => {\n    if (this._skipNextFocus && event.type === 'focus') {\n      this._skipNextFocus = false;\n      return;\n    }\n\n    // We only need to hit the zone when we're selecting a range.\n    if (event.target && this.isRange) {\n      const cell = this._getCellFromElement(event.target as HTMLElement);\n\n      if (cell) {\n        this._ngZone.run(() => this.previewChange.emit({value: cell.enabled ? cell : null, event}));\n      }\n    }\n  }\n\n  /**\n   * Event handler for when the user's pointer leaves an element\n   * inside the calendar body (e.g. by hovering out or blurring).\n   */\n  private _leaveHandler = (event: Event) => {\n    // We only need to hit the zone when we're selecting a range.\n    if (this.previewEnd !== null && this.isRange) {\n      // Only reset the preview end value when leaving cells. This looks better, because\n      // we have a gap between the cells and the rows and we don't want to remove the\n      // range just for it to show up again when the user moves a few pixels to the side.\n      if (event.target && isTableCell(event.target as HTMLElement)) {\n        this._ngZone.run(() => this.previewChange.emit({value: null, event}));\n      }\n    }\n  }\n\n  /** Finds the MatCalendarCell that corresponds to a DOM node. */\n  private _getCellFromElement(element: HTMLElement): MatCalendarCell | null {\n    let cell: HTMLElement | undefined;\n\n    if (isTableCell(element)) {\n      cell = element;\n    } else if (isTableCell(element.parentNode!)) {\n      cell = element.parentNode as HTMLElement;\n    }\n\n    if (cell) {\n      const row = cell.getAttribute('data-mat-row');\n      const col = cell.getAttribute('data-mat-col');\n\n      if (row && col) {\n        return this.rows[parseInt(row)][parseInt(col)];\n      }\n    }\n\n    return null;\n  }\n\n}\n\n/** Checks whether a node is a table cell element. */\nfunction isTableCell(node: Node): node is HTMLTableCellElement {\n  return node.nodeName === 'TD';\n}\n\n/** Checks whether a value is the start of a range. */\nfunction isStart(value: number, start: number | null, end: number | null): boolean {\n  return end !== null && start !== end && value < end && value === start;\n}\n\n/** Checks whether a value is the end of a range. */\nfunction isEnd(value: number, start: number | null, end: number | null): boolean {\n  return start !== null && start !== end && value >= start && value === end;\n}\n\n/** Checks whether a value is inside of a range. */\nfunction isInRange(value: number,\n                   start: number | null,\n                   end: number | null,\n                   rangeEnabled: boolean): boolean {\n  return rangeEnabled && start !== null && end !== null && start !== end &&\n         value >= start && value <= end;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {FactoryProvider, Injectable, Optional, SkipSelf, OnDestroy, Directive} from '@angular/core';\nimport {DateAdapter} from '@angular/material/core';\nimport {Observable, Subject} from 'rxjs';\n\n/** A class representing a range of dates. */\nexport class DateRange<D> {\n  /**\n   * Ensures that objects with a `start` and `end` property can't be assigned to a variable that\n   * expects a `DateRange`\n   */\n  // tslint:disable-next-line:no-unused-variable\n  private _disableStructuralEquivalency: never;\n\n  constructor(\n    /** The start date of the range. */\n    readonly start: D | null,\n    /** The end date of the range. */\n    readonly end: D | null) {}\n}\n\n/**\n * Conditionally picks the date type, if a DateRange is passed in.\n * @docs-private\n */\nexport type ExtractDateTypeFromSelection<T> = T extends DateRange<infer D> ? D : NonNullable<T>;\n\n/** Event emitted by the date selection model when its selection changes. */\nexport interface DateSelectionModelChange<S> {\n  /** New value for the selection. */\n  selection: S;\n\n  /** Object that triggered the change. */\n  source: unknown;\n}\n\n/** A selection model containing a date selection. */\n@Directive()\nexport abstract class MatDateSelectionModel<S, D = ExtractDateTypeFromSelection<S>>\n    implements OnDestroy {\n  private _selectionChanged = new Subject<DateSelectionModelChange<S>>();\n\n  /** Emits when the selection has changed. */\n  selectionChanged: Observable<DateSelectionModelChange<S>> = this._selectionChanged;\n\n  protected constructor(\n    /** The current selection. */\n    readonly selection: S,\n    protected _adapter: DateAdapter<D>) {\n    this.selection = selection;\n  }\n\n  /**\n   * Updates the current selection in the model.\n   * @param value New selection that should be assigned.\n   * @param source Object that triggered the selection change.\n   */\n  updateSelection(value: S, source: unknown) {\n    (this as {selection: S}).selection = value;\n    this._selectionChanged.next({selection: value, source});\n  }\n\n  ngOnDestroy() {\n    this._selectionChanged.complete();\n  }\n\n  protected _isValidDateInstance(date: D): boolean {\n    return this._adapter.isDateInstance(date) && this._adapter.isValid(date);\n  }\n\n  /** Adds a date to the current selection. */\n  abstract add(date: D | null): void;\n\n  /** Checks whether the current selection is valid. */\n  abstract isValid(): boolean;\n\n  /** Checks whether the current selection is complete. */\n  abstract isComplete(): boolean;\n}\n\n/**  A selection model that contains a single date. */\n@Injectable()\nexport class MatSingleDateSelectionModel<D> extends MatDateSelectionModel<D | null, D> {\n  constructor(adapter: DateAdapter<D>) {\n    super(null, adapter);\n  }\n\n  /**\n   * Adds a date to the current selection. In the case of a single date selection, the added date\n   * simply overwrites the previous selection\n   */\n  add(date: D | null) {\n    super.updateSelection(date, this);\n  }\n\n  /** Checks whether the current selection is valid. */\n  isValid(): boolean {\n    return this.selection != null && this._isValidDateInstance(this.selection);\n  }\n\n  /**\n   * Checks whether the current selection is complete. In the case of a single date selection, this\n   * is true if the current selection is not null.\n   */\n  isComplete() {\n    return this.selection != null;\n  }\n}\n\n/**  A selection model that contains a date range. */\n@Injectable()\nexport class MatRangeDateSelectionModel<D> extends MatDateSelectionModel<DateRange<D>, D> {\n  constructor(adapter: DateAdapter<D>) {\n    super(new DateRange<D>(null, null), adapter);\n  }\n\n  /**\n   * Adds a date to the current selection. In the case of a date range selection, the added date\n   * fills in the next `null` value in the range. If both the start and the end already have a date,\n   * the selection is reset so that the given date is the new `start` and the `end` is null.\n   */\n  add(date: D | null): void {\n    let {start, end} = this.selection;\n\n    if (start == null) {\n      start = date;\n    } else if (end == null) {\n      end = date;\n    } else {\n      start = date;\n      end = null;\n    }\n\n    super.updateSelection(new DateRange<D>(start, end), this);\n  }\n\n  /** Checks whether the current selection is valid. */\n  isValid(): boolean {\n    const {start, end} = this.selection;\n\n    // Empty ranges are valid.\n    if (start == null && end == null) {\n      return true;\n    }\n\n    // Complete ranges are only valid if both dates are valid and the start is before the end.\n    if (start != null && end != null) {\n      return this._isValidDateInstance(start) && this._isValidDateInstance(end) &&\n             this._adapter.compareDate(start, end) <= 0;\n    }\n\n    // Partial ranges are valid if the start/end is valid.\n    return (start == null || this._isValidDateInstance(start)) &&\n           (end == null || this._isValidDateInstance(end));\n  }\n\n  /**\n   * Checks whether the current selection is complete. In the case of a date range selection, this\n   * is true if the current selection has a non-null `start` and `end`.\n   */\n  isComplete(): boolean {\n    return this.selection.start != null && this.selection.end != null;\n  }\n}\n\n/** @docs-private */\nexport function MAT_SINGLE_DATE_SELECTION_MODEL_FACTORY(\n    parent: MatSingleDateSelectionModel<unknown>, adapter: DateAdapter<unknown>) {\n  return parent || new MatSingleDateSelectionModel(adapter);\n}\n\n/** Used to provide a single selection model to a component. */\nexport const MAT_SINGLE_DATE_SELECTION_MODEL_PROVIDER: FactoryProvider = {\n  provide: MatDateSelectionModel,\n  deps: [[new Optional(), new SkipSelf(), MatDateSelectionModel], DateAdapter],\n  useFactory: MAT_SINGLE_DATE_SELECTION_MODEL_FACTORY,\n};\n\n\n/** @docs-private */\nexport function MAT_RANGE_DATE_SELECTION_MODEL_FACTORY(\n    parent: MatSingleDateSelectionModel<unknown>, adapter: DateAdapter<unknown>) {\n  return parent || new MatRangeDateSelectionModel(adapter);\n}\n\n/** Used to provide a range selection model to a component. */\nexport const MAT_RANGE_DATE_SELECTION_MODEL_PROVIDER: FactoryProvider = {\n  provide: MatDateSelectionModel,\n  deps: [[new Optional(), new SkipSelf(), MatDateSelectionModel], DateAdapter],\n  useFactory: MAT_RANGE_DATE_SELECTION_MODEL_FACTORY,\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable, InjectionToken, Optional, SkipSelf, FactoryProvider} from '@angular/core';\nimport {DateAdapter} from '@angular/material/core';\nimport {DateRange} from './date-selection-model';\n\n/** Injection token used to customize the date range selection behavior. */\nexport const MAT_DATE_RANGE_SELECTION_STRATEGY =\n    new InjectionToken<MatDateRangeSelectionStrategy<any>>('MAT_DATE_RANGE_SELECTION_STRATEGY');\n\n/** Object that can be provided in order to customize the date range selection behavior. */\nexport interface MatDateRangeSelectionStrategy<D> {\n  /**\n   * Called when the user has finished selecting a value.\n   * @param date Date that was selected. Will be null if the user cleared the selection.\n   * @param currentRange Range that is currently show in the calendar.\n   * @param event DOM event that triggered the selection. Currently only corresponds to a `click`\n   *    event, but it may get expanded in the future.\n   */\n  selectionFinished(date: D | null, currentRange: DateRange<D>, event: Event): DateRange<D>;\n\n  /**\n   * Called when the user has activated a new date (e.g. by hovering over\n   * it or moving focus) and the calendar tries to display a date range.\n   *\n   * @param activeDate Date that the user has activated. Will be null if the user moved\n   *    focus to an element that's no a calendar cell.\n   * @param currentRange Range that is currently shown in the calendar.\n   * @param event DOM event that caused the preview to be changed. Will be either a\n   *    `mouseenter`/`mouseleave` or `focus`/`blur` depending on how the user is navigating.\n   */\n  createPreview(activeDate: D | null, currentRange: DateRange<D>, event: Event): DateRange<D>;\n}\n\n/** Provides the default date range selection behavior. */\n@Injectable()\nexport class DefaultMatCalendarRangeStrategy<D> implements MatDateRangeSelectionStrategy<D> {\n  constructor(private _dateAdapter: DateAdapter<D>) {}\n\n  selectionFinished(date: D, currentRange: DateRange<D>) {\n    let {start, end} = currentRange;\n\n    if (start == null) {\n      start = date;\n    } else if (end == null && date && this._dateAdapter.compareDate(date, start) >= 0) {\n      end = date;\n    } else {\n      start = date;\n      end = null;\n    }\n\n    return new DateRange<D>(start, end);\n  }\n\n  createPreview(activeDate: D | null, currentRange: DateRange<D>) {\n    let start: D | null = null;\n    let end: D | null = null;\n\n    if (currentRange.start && !currentRange.end && activeDate) {\n      start = currentRange.start;\n      end = activeDate;\n    }\n\n    return new DateRange<D>(start, end);\n  }\n}\n\n\n/** @docs-private */\nexport function MAT_CALENDAR_RANGE_STRATEGY_PROVIDER_FACTORY(\n  parent: MatDateRangeSelectionStrategy<unknown>, adapter: DateAdapter<unknown>) {\n  return parent || new DefaultMatCalendarRangeStrategy(adapter);\n}\n\n/** @docs-private */\nexport const MAT_CALENDAR_RANGE_STRATEGY_PROVIDER: FactoryProvider = {\n  provide: MAT_DATE_RANGE_SELECTION_STRATEGY,\n  deps: [[new Optional(), new SkipSelf(), MAT_DATE_RANGE_SELECTION_STRATEGY], DateAdapter],\n  useFactory: MAT_CALENDAR_RANGE_STRATEGY_PROVIDER_FACTORY,\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  DOWN_ARROW,\n  END,\n  ENTER,\n  HOME,\n  LEFT_ARROW,\n  PAGE_DOWN,\n  PAGE_UP,\n  RIGHT_ARROW,\n  UP_ARROW,\n  SPACE,\n  ESCAPE,\n} from '@angular/cdk/keycodes';\nimport {\n  AfterContentInit,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  EventEmitter,\n  Inject,\n  Input,\n  Optional,\n  Output,\n  ViewEncapsulation,\n  ViewChild,\n  OnDestroy,\n  SimpleChanges,\n  OnChanges,\n} from '@angular/core';\nimport {DateAdapter, MAT_DATE_FORMATS, MatDateFormats} from '@angular/material/core';\nimport {Directionality} from '@angular/cdk/bidi';\nimport {\n  MatCalendarBody,\n  MatCalendarCell,\n  MatCalendarUserEvent,\n  MatCalendarCellClassFunction,\n} from './calendar-body';\nimport {createMissingDateImplError} from './datepicker-errors';\nimport {Subscription} from 'rxjs';\nimport {startWith} from 'rxjs/operators';\nimport {DateRange} from './date-selection-model';\nimport {\n  MatDateRangeSelectionStrategy,\n  MAT_DATE_RANGE_SELECTION_STRATEGY,\n} from './date-range-selection-strategy';\n\n\nconst DAYS_PER_WEEK = 7;\n\n\n/**\n * An internal component used to display a single month in the datepicker.\n * @docs-private\n */\n@Component({\n  selector: 'mat-month-view',\n  templateUrl: 'month-view.html',\n  exportAs: 'matMonthView',\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush\n})\nexport class MatMonthView<D> implements AfterContentInit, OnChanges, OnDestroy {\n  private _rerenderSubscription = Subscription.EMPTY;\n\n  /**\n   * The date to display in this month view (everything other than the month and year is ignored).\n   */\n  @Input()\n  get activeDate(): D { return this._activeDate; }\n  set activeDate(value: D) {\n    const oldActiveDate = this._activeDate;\n    const validDate =\n      this._dateAdapter.getValidDateOrNull(\n        this._dateAdapter.deserialize(value)\n      ) || this._dateAdapter.today();\n    this._activeDate = this._dateAdapter.clampDate(validDate, this.minDate, this.maxDate);\n    if (!this._hasSameMonthAndYear(oldActiveDate, this._activeDate)) {\n      this._init();\n    }\n  }\n  private _activeDate: D;\n\n  /** The currently selected date. */\n  @Input()\n  get selected(): DateRange<D> | D | null { return this._selected; }\n  set selected(value: DateRange<D> | D | null) {\n    if (value instanceof DateRange) {\n      this._selected = value;\n    } else {\n      this._selected = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(value));\n    }\n\n    this._setRanges(this._selected);\n  }\n  private _selected: DateRange<D> | D | null;\n\n  /** The minimum selectable date. */\n  @Input()\n  get minDate(): D | null { return this._minDate; }\n  set minDate(value: D | null) {\n    this._minDate = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(value));\n  }\n  private _minDate: D | null;\n\n  /** The maximum selectable date. */\n  @Input()\n  get maxDate(): D | null { return this._maxDate; }\n  set maxDate(value: D | null) {\n    this._maxDate = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(value));\n  }\n  private _maxDate: D | null;\n\n  /** Function used to filter which dates are selectable. */\n  @Input() dateFilter: (date: D) => boolean;\n\n  /** Function that can be used to add custom CSS classes to dates. */\n  @Input() dateClass: MatCalendarCellClassFunction<D>;\n\n  /** Start of the comparison range. */\n  @Input() comparisonStart: D | null;\n\n  /** End of the comparison range. */\n  @Input() comparisonEnd: D | null;\n\n  /** Emits when a new date is selected. */\n  @Output() readonly selectedChange: EventEmitter<D | null> = new EventEmitter<D | null>();\n\n  /** Emits when any date is selected. */\n  @Output() readonly _userSelection: EventEmitter<MatCalendarUserEvent<D | null>> =\n      new EventEmitter<MatCalendarUserEvent<D | null>>();\n\n  /** Emits when any date is activated. */\n  @Output() readonly activeDateChange: EventEmitter<D> = new EventEmitter<D>();\n\n  /** The body of calendar table */\n  @ViewChild(MatCalendarBody) _matCalendarBody: MatCalendarBody;\n\n  /** The label for this month (e.g. \"January 2017\"). */\n  _monthLabel: string;\n\n  /** Grid of calendar cells representing the dates of the month. */\n  _weeks: MatCalendarCell[][];\n\n  /** The number of blank cells in the first row before the 1st of the month. */\n  _firstWeekOffset: number;\n\n  /** Start value of the currently-shown date range. */\n  _rangeStart: number | null;\n\n  /** End value of the currently-shown date range. */\n  _rangeEnd: number | null;\n\n  /** Start value of the currently-shown comparison date range. */\n  _comparisonRangeStart: number | null;\n\n  /** End value of the currently-shown comparison date range. */\n  _comparisonRangeEnd: number | null;\n\n  /** Start of the preview range. */\n  _previewStart: number | null;\n\n  /** End of the preview range. */\n  _previewEnd: number | null;\n\n  /** Whether the user is currently selecting a range of dates. */\n  _isRange: boolean;\n\n  /** The date of the month that today falls on. Null if today is in another month. */\n  _todayDate: number | null;\n\n  /** The names of the weekdays. */\n  _weekdays: {long: string, narrow: string}[];\n\n  constructor(private _changeDetectorRef: ChangeDetectorRef,\n              @Optional() @Inject(MAT_DATE_FORMATS) private _dateFormats: MatDateFormats,\n              @Optional() public _dateAdapter: DateAdapter<D>,\n              @Optional() private _dir?: Directionality,\n              @Inject(MAT_DATE_RANGE_SELECTION_STRATEGY) @Optional()\n                  private _rangeStrategy?: MatDateRangeSelectionStrategy<D>) {\n\n    if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      if (!this._dateAdapter) {\n        throw createMissingDateImplError('DateAdapter');\n      }\n      if (!this._dateFormats) {\n        throw createMissingDateImplError('MAT_DATE_FORMATS');\n      }\n    }\n\n    this._activeDate = this._dateAdapter.today();\n  }\n\n  ngAfterContentInit() {\n    this._rerenderSubscription = this._dateAdapter.localeChanges\n      .pipe(startWith(null))\n      .subscribe(() => this._init());\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    const comparisonChange = changes['comparisonStart'] || changes['comparisonEnd'];\n\n    if (comparisonChange && !comparisonChange.firstChange) {\n      this._setRanges(this.selected);\n    }\n  }\n\n  ngOnDestroy() {\n    this._rerenderSubscription.unsubscribe();\n  }\n\n  /** Handles when a new date is selected. */\n  _dateSelected(event: MatCalendarUserEvent<number>) {\n    const date = event.value;\n    const selectedYear = this._dateAdapter.getYear(this.activeDate);\n    const selectedMonth = this._dateAdapter.getMonth(this.activeDate);\n    const selectedDate = this._dateAdapter.createDate(selectedYear, selectedMonth, date);\n    let rangeStartDate: number | null;\n    let rangeEndDate: number | null;\n\n    if (this._selected instanceof DateRange) {\n      rangeStartDate = this._getDateInCurrentMonth(this._selected.start);\n      rangeEndDate = this._getDateInCurrentMonth(this._selected.end);\n    } else {\n      rangeStartDate = rangeEndDate = this._getDateInCurrentMonth(this._selected);\n    }\n\n    if (rangeStartDate !== date || rangeEndDate !== date) {\n      this.selectedChange.emit(selectedDate);\n    }\n\n    this._userSelection.emit({value: selectedDate, event: event.event});\n  }\n\n  /** Handles keydown events on the calendar body when calendar is in month view. */\n  _handleCalendarBodyKeydown(event: KeyboardEvent): void {\n    // TODO(mmalerba): We currently allow keyboard navigation to disabled dates, but just prevent\n    // disabled ones from being selected. This may not be ideal, we should look into whether\n    // navigation should skip over disabled dates, and if so, how to implement that efficiently.\n\n    const oldActiveDate = this._activeDate;\n    const isRtl = this._isRtl();\n\n    switch (event.keyCode) {\n      case LEFT_ARROW:\n        this.activeDate = this._dateAdapter.addCalendarDays(this._activeDate, isRtl ? 1 : -1);\n        break;\n      case RIGHT_ARROW:\n        this.activeDate = this._dateAdapter.addCalendarDays(this._activeDate, isRtl ? -1 : 1);\n        break;\n      case UP_ARROW:\n        this.activeDate = this._dateAdapter.addCalendarDays(this._activeDate, -7);\n        break;\n      case DOWN_ARROW:\n        this.activeDate = this._dateAdapter.addCalendarDays(this._activeDate, 7);\n        break;\n      case HOME:\n        this.activeDate = this._dateAdapter.addCalendarDays(this._activeDate,\n            1 - this._dateAdapter.getDate(this._activeDate));\n        break;\n      case END:\n        this.activeDate = this._dateAdapter.addCalendarDays(this._activeDate,\n            (this._dateAdapter.getNumDaysInMonth(this._activeDate) -\n              this._dateAdapter.getDate(this._activeDate)));\n        break;\n      case PAGE_UP:\n        this.activeDate = event.altKey ?\n            this._dateAdapter.addCalendarYears(this._activeDate, -1) :\n            this._dateAdapter.addCalendarMonths(this._activeDate, -1);\n        break;\n      case PAGE_DOWN:\n        this.activeDate = event.altKey ?\n            this._dateAdapter.addCalendarYears(this._activeDate, 1) :\n            this._dateAdapter.addCalendarMonths(this._activeDate, 1);\n        break;\n      case ENTER:\n      case SPACE:\n        if (!this.dateFilter || this.dateFilter(this._activeDate)) {\n          this._dateSelected({value: this._dateAdapter.getDate(this._activeDate), event});\n          // Prevent unexpected default actions such as form submission.\n          event.preventDefault();\n        }\n        return;\n      case ESCAPE:\n        // Abort the current range selection if the user presses escape mid-selection.\n        if (this._previewEnd != null) {\n          this._previewStart = this._previewEnd = null;\n          this.selectedChange.emit(null);\n          this._userSelection.emit({value: null, event});\n          event.preventDefault();\n          event.stopPropagation(); // Prevents the overlay from closing.\n        }\n        return;\n      default:\n        // Don't prevent default or focus active cell on keys that we don't explicitly handle.\n        return;\n    }\n\n    if (this._dateAdapter.compareDate(oldActiveDate, this.activeDate)) {\n      this.activeDateChange.emit(this.activeDate);\n    }\n\n    this._focusActiveCell();\n    // Prevent unexpected default actions such as form submission.\n    event.preventDefault();\n  }\n\n  /** Initializes this month view. */\n  _init() {\n    this._setRanges(this.selected);\n    this._todayDate = this._getCellCompareValue(this._dateAdapter.today());\n    this._monthLabel =\n        this._dateAdapter.getMonthNames('short')[this._dateAdapter.getMonth(this.activeDate)]\n            .toLocaleUpperCase();\n\n    let firstOfMonth = this._dateAdapter.createDate(this._dateAdapter.getYear(this.activeDate),\n        this._dateAdapter.getMonth(this.activeDate), 1);\n    this._firstWeekOffset =\n        (DAYS_PER_WEEK + this._dateAdapter.getDayOfWeek(firstOfMonth) -\n         this._dateAdapter.getFirstDayOfWeek()) % DAYS_PER_WEEK;\n\n    this._initWeekdays();\n    this._createWeekCells();\n    this._changeDetectorRef.markForCheck();\n  }\n\n  /** Focuses the active cell after the microtask queue is empty. */\n  _focusActiveCell(movePreview?: boolean) {\n    this._matCalendarBody._focusActiveCell(movePreview);\n  }\n\n  /** Called when the user has activated a new cell and the preview needs to be updated. */\n  _previewChanged({event, value: cell}: MatCalendarUserEvent<MatCalendarCell<D> | null>) {\n    if (this._rangeStrategy) {\n      // We can assume that this will be a range, because preview\n      // events aren't fired for single date selections.\n      const value = cell ? cell.rawValue! : null;\n      const previewRange =\n          this._rangeStrategy.createPreview(value, this.selected as DateRange<D>, event);\n      this._previewStart = this._getCellCompareValue(previewRange.start);\n      this._previewEnd = this._getCellCompareValue(previewRange.end);\n\n      // Note that here we need to use `detectChanges`, rather than `markForCheck`, because\n      // the way `_focusActiveCell` is set up at the moment makes it fire at the wrong time\n      // when navigating one month back using the keyboard which will cause this handler\n      // to throw a \"changed after checked\" error when updating the preview state.\n      this._changeDetectorRef.detectChanges();\n    }\n  }\n\n  /** Initializes the weekdays. */\n  private _initWeekdays() {\n    const firstDayOfWeek = this._dateAdapter.getFirstDayOfWeek();\n    const narrowWeekdays = this._dateAdapter.getDayOfWeekNames('narrow');\n    const longWeekdays = this._dateAdapter.getDayOfWeekNames('long');\n\n    // Rotate the labels for days of the week based on the configured first day of the week.\n    let weekdays = longWeekdays.map((long, i) => {\n        return {long, narrow: narrowWeekdays[i]};\n    });\n    this._weekdays = weekdays.slice(firstDayOfWeek).concat(weekdays.slice(0, firstDayOfWeek));\n  }\n\n  /** Creates MatCalendarCells for the dates in this month. */\n  private _createWeekCells() {\n    const daysInMonth = this._dateAdapter.getNumDaysInMonth(this.activeDate);\n    const dateNames = this._dateAdapter.getDateNames();\n    this._weeks = [[]];\n    for (let i = 0, cell = this._firstWeekOffset; i < daysInMonth; i++, cell++) {\n      if (cell == DAYS_PER_WEEK) {\n        this._weeks.push([]);\n        cell = 0;\n      }\n      const date = this._dateAdapter.createDate(\n            this._dateAdapter.getYear(this.activeDate),\n            this._dateAdapter.getMonth(this.activeDate), i + 1);\n      const enabled = this._shouldEnableDate(date);\n      const ariaLabel = this._dateAdapter.format(date, this._dateFormats.display.dateA11yLabel);\n      const cellClasses = this.dateClass ? this.dateClass(date, 'month') : undefined;\n\n      this._weeks[this._weeks.length - 1].push(new MatCalendarCell<D>(i + 1, dateNames[i],\n          ariaLabel, enabled, cellClasses, this._getCellCompareValue(date)!, date));\n    }\n  }\n\n  /** Date filter for the month */\n  private _shouldEnableDate(date: D): boolean {\n    return !!date &&\n        (!this.minDate || this._dateAdapter.compareDate(date, this.minDate) >= 0) &&\n        (!this.maxDate || this._dateAdapter.compareDate(date, this.maxDate) <= 0) &&\n        (!this.dateFilter || this.dateFilter(date));\n  }\n\n  /**\n   * Gets the date in this month that the given Date falls on.\n   * Returns null if the given Date is in another month.\n   */\n  private _getDateInCurrentMonth(date: D | null): number | null {\n    return date && this._hasSameMonthAndYear(date, this.activeDate) ?\n        this._dateAdapter.getDate(date) : null;\n  }\n\n  /** Checks whether the 2 dates are non-null and fall within the same month of the same year. */\n  private _hasSameMonthAndYear(d1: D | null, d2: D | null): boolean {\n    return !!(d1 && d2 && this._dateAdapter.getMonth(d1) == this._dateAdapter.getMonth(d2) &&\n              this._dateAdapter.getYear(d1) == this._dateAdapter.getYear(d2));\n  }\n\n  /** Gets the value that will be used to one cell to another. */\n  private _getCellCompareValue(date: D | null): number | null {\n    if (date) {\n      // We use the time since the Unix epoch to compare dates in this view, rather than the\n      // cell values, because we need to support ranges that span across multiple months/years.\n      const year = this._dateAdapter.getYear(date);\n      const month = this._dateAdapter.getMonth(date);\n      const day = this._dateAdapter.getDate(date);\n      return new Date(year, month, day).getTime();\n    }\n\n    return null;\n  }\n\n  /** Determines whether the user has the RTL layout direction. */\n  private _isRtl() {\n    return this._dir && this._dir.value === 'rtl';\n  }\n\n  /** Sets the current range based on a model value. */\n  private _setRanges(selectedValue: DateRange<D> | D | null) {\n    if (selectedValue instanceof DateRange) {\n      this._rangeStart = this._getCellCompareValue(selectedValue.start);\n      this._rangeEnd = this._getCellCompareValue(selectedValue.end);\n      this._isRange = true;\n    } else {\n      this._rangeStart = this._rangeEnd = this._getCellCompareValue(selectedValue);\n      this._isRange = false;\n    }\n\n    this._comparisonRangeStart = this._getCellCompareValue(this.comparisonStart);\n    this._comparisonRangeEnd = this._getCellCompareValue(this.comparisonEnd);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  DOWN_ARROW,\n  END,\n  ENTER,\n  HOME,\n  LEFT_ARROW,\n  PAGE_DOWN,\n  PAGE_UP,\n  RIGHT_ARROW,\n  UP_ARROW,\n  SPACE,\n} from '@angular/cdk/keycodes';\nimport {\n  AfterContentInit,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  EventEmitter,\n  Input,\n  Optional,\n  Output,\n  ViewChild,\n  ViewEncapsulation,\n  OnDestroy,\n} from '@angular/core';\nimport {DateAdapter} from '@angular/material/core';\nimport {Directionality} from '@angular/cdk/bidi';\nimport {\n  MatCalendarBody,\n  MatCalendarCell,\n  MatCalendarUserEvent,\n  MatCalendarCellClassFunction,\n} from './calendar-body';\nimport {createMissingDateImplError} from './datepicker-errors';\nimport {Subscription} from 'rxjs';\nimport {startWith} from 'rxjs/operators';\nimport {DateRange} from './date-selection-model';\n\nexport const yearsPerPage = 24;\n\nexport const yearsPerRow = 4;\n\n/**\n * An internal component used to display a year selector in the datepicker.\n * @docs-private\n */\n@Component({\n  selector: 'mat-multi-year-view',\n  templateUrl: 'multi-year-view.html',\n  exportAs: 'matMultiYearView',\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush\n})\nexport class MatMultiYearView<D> implements AfterContentInit, OnDestroy {\n  private _rerenderSubscription = Subscription.EMPTY;\n\n  /** The date to display in this multi-year view (everything other than the year is ignored). */\n  @Input()\n  get activeDate(): D { return this._activeDate; }\n  set activeDate(value: D) {\n    let oldActiveDate = this._activeDate;\n    const validDate =\n      this._dateAdapter.getValidDateOrNull(\n        this._dateAdapter.deserialize(value)\n      ) || this._dateAdapter.today();\n    this._activeDate = this._dateAdapter.clampDate(validDate, this.minDate, this.maxDate);\n\n    if (!isSameMultiYearView(\n      this._dateAdapter, oldActiveDate, this._activeDate, this.minDate, this.maxDate)) {\n      this._init();\n    }\n  }\n  private _activeDate: D;\n\n  /** The currently selected date. */\n  @Input()\n  get selected(): DateRange<D> | D | null { return this._selected; }\n  set selected(value: DateRange<D> | D | null) {\n    if (value instanceof DateRange) {\n      this._selected = value;\n    } else {\n      this._selected = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(value));\n    }\n\n    this._setSelectedYear(value);\n  }\n  private _selected: DateRange<D> | D | null;\n\n\n  /** The minimum selectable date. */\n  @Input()\n  get minDate(): D | null { return this._minDate; }\n  set minDate(value: D | null) {\n    this._minDate = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(value));\n  }\n  private _minDate: D | null;\n\n  /** The maximum selectable date. */\n  @Input()\n  get maxDate(): D | null { return this._maxDate; }\n  set maxDate(value: D | null) {\n    this._maxDate = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(value));\n  }\n  private _maxDate: D | null;\n\n  /** A function used to filter which dates are selectable. */\n  @Input() dateFilter: (date: D) => boolean;\n\n  /** Function that can be used to add custom CSS classes to date cells. */\n  @Input() dateClass: MatCalendarCellClassFunction<D>;\n\n  /** Emits when a new year is selected. */\n  @Output() readonly selectedChange: EventEmitter<D> = new EventEmitter<D>();\n\n  /** Emits the selected year. This doesn't imply a change on the selected date */\n  @Output() readonly yearSelected: EventEmitter<D> = new EventEmitter<D>();\n\n  /** Emits when any date is activated. */\n  @Output() readonly activeDateChange: EventEmitter<D> = new EventEmitter<D>();\n\n  /** The body of calendar table */\n  @ViewChild(MatCalendarBody) _matCalendarBody: MatCalendarBody;\n\n  /** Grid of calendar cells representing the currently displayed years. */\n  _years: MatCalendarCell[][];\n\n  /** The year that today falls on. */\n  _todayYear: number;\n\n  /** The year of the selected date. Null if the selected date is null. */\n  _selectedYear: number | null;\n\n  constructor(private _changeDetectorRef: ChangeDetectorRef,\n              @Optional() public _dateAdapter: DateAdapter<D>,\n              @Optional() private _dir?: Directionality) {\n    if (!this._dateAdapter && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw createMissingDateImplError('DateAdapter');\n    }\n\n    this._activeDate = this._dateAdapter.today();\n  }\n\n  ngAfterContentInit() {\n    this._rerenderSubscription = this._dateAdapter.localeChanges\n      .pipe(startWith(null))\n      .subscribe(() => this._init());\n  }\n\n  ngOnDestroy() {\n    this._rerenderSubscription.unsubscribe();\n  }\n\n  /** Initializes this multi-year view. */\n  _init() {\n    this._todayYear = this._dateAdapter.getYear(this._dateAdapter.today());\n\n    // We want a range years such that we maximize the number of\n    // enabled dates visible at once. This prevents issues where the minimum year\n    // is the last item of a page OR the maximum year is the first item of a page.\n\n    // The offset from the active year to the \"slot\" for the starting year is the\n    // *actual* first rendered year in the multi-year view.\n    const activeYear = this._dateAdapter.getYear(this._activeDate);\n    const minYearOfPage = activeYear - getActiveOffset(\n      this._dateAdapter, this.activeDate, this.minDate, this.maxDate);\n\n    this._years = [];\n    for (let i = 0, row: number[] = []; i < yearsPerPage; i++) {\n      row.push(minYearOfPage + i);\n      if (row.length == yearsPerRow) {\n        this._years.push(row.map(year => this._createCellForYear(year)));\n        row = [];\n      }\n    }\n    this._changeDetectorRef.markForCheck();\n  }\n\n  /** Handles when a new year is selected. */\n  _yearSelected(event: MatCalendarUserEvent<number>) {\n    const year = event.value;\n    this.yearSelected.emit(this._dateAdapter.createDate(year, 0, 1));\n    let month = this._dateAdapter.getMonth(this.activeDate);\n    let daysInMonth =\n        this._dateAdapter.getNumDaysInMonth(this._dateAdapter.createDate(year, month, 1));\n    this.selectedChange.emit(this._dateAdapter.createDate(year, month,\n        Math.min(this._dateAdapter.getDate(this.activeDate), daysInMonth)));\n  }\n\n  /** Handles keydown events on the calendar body when calendar is in multi-year view. */\n  _handleCalendarBodyKeydown(event: KeyboardEvent): void {\n    const oldActiveDate = this._activeDate;\n    const isRtl = this._isRtl();\n\n    switch (event.keyCode) {\n      case LEFT_ARROW:\n        this.activeDate = this._dateAdapter.addCalendarYears(this._activeDate, isRtl ? 1 : -1);\n        break;\n      case RIGHT_ARROW:\n        this.activeDate = this._dateAdapter.addCalendarYears(this._activeDate, isRtl ? -1 : 1);\n        break;\n      case UP_ARROW:\n        this.activeDate = this._dateAdapter.addCalendarYears(this._activeDate, -yearsPerRow);\n        break;\n      case DOWN_ARROW:\n        this.activeDate = this._dateAdapter.addCalendarYears(this._activeDate, yearsPerRow);\n        break;\n      case HOME:\n        this.activeDate = this._dateAdapter.addCalendarYears(this._activeDate,\n          -getActiveOffset(this._dateAdapter, this.activeDate, this.minDate, this.maxDate));\n        break;\n      case END:\n        this.activeDate = this._dateAdapter.addCalendarYears(this._activeDate,\n          yearsPerPage - getActiveOffset(\n            this._dateAdapter, this.activeDate, this.minDate, this.maxDate) - 1);\n        break;\n      case PAGE_UP:\n        this.activeDate =\n            this._dateAdapter.addCalendarYears(\n                this._activeDate, event.altKey ? -yearsPerPage * 10 : -yearsPerPage);\n        break;\n      case PAGE_DOWN:\n        this.activeDate =\n            this._dateAdapter.addCalendarYears(\n                this._activeDate, event.altKey ? yearsPerPage * 10 : yearsPerPage);\n        break;\n      case ENTER:\n      case SPACE:\n        this._yearSelected({value: this._dateAdapter.getYear(this._activeDate), event});\n        break;\n      default:\n        // Don't prevent default or focus active cell on keys that we don't explicitly handle.\n        return;\n    }\n    if (this._dateAdapter.compareDate(oldActiveDate, this.activeDate)) {\n      this.activeDateChange.emit(this.activeDate);\n    }\n\n    this._focusActiveCell();\n    // Prevent unexpected default actions such as form submission.\n    event.preventDefault();\n  }\n\n  _getActiveCell(): number {\n    return getActiveOffset(this._dateAdapter, this.activeDate, this.minDate, this.maxDate);\n  }\n\n  /** Focuses the active cell after the microtask queue is empty. */\n  _focusActiveCell() {\n    this._matCalendarBody._focusActiveCell();\n  }\n\n  /** Creates an MatCalendarCell for the given year. */\n  private _createCellForYear(year: number) {\n    const date = this._dateAdapter.createDate(year, 0, 1);\n    const yearName = this._dateAdapter.getYearName(date);\n    const cellClasses = this.dateClass ? this.dateClass(date, 'multi-year') : undefined;\n\n    return new MatCalendarCell(year, yearName, yearName, this._shouldEnableYear(year), cellClasses);\n  }\n\n  /** Whether the given year is enabled. */\n  private _shouldEnableYear(year: number) {\n    // disable if the year is greater than maxDate lower than minDate\n    if (year === undefined || year === null ||\n        (this.maxDate && year > this._dateAdapter.getYear(this.maxDate)) ||\n        (this.minDate && year < this._dateAdapter.getYear(this.minDate))) {\n      return false;\n    }\n\n    // enable if it reaches here and there's no filter defined\n    if (!this.dateFilter) {\n      return true;\n    }\n\n    const firstOfYear = this._dateAdapter.createDate(year, 0, 1);\n\n    // If any date in the year is enabled count the year as enabled.\n    for (let date = firstOfYear; this._dateAdapter.getYear(date) == year;\n      date = this._dateAdapter.addCalendarDays(date, 1)) {\n      if (this.dateFilter(date)) {\n        return true;\n      }\n    }\n\n    return false;\n  }\n\n  /** Determines whether the user has the RTL layout direction. */\n  private _isRtl() {\n    return this._dir && this._dir.value === 'rtl';\n  }\n\n  /** Sets the currently-highlighted year based on a model value. */\n  private _setSelectedYear(value: DateRange<D> | D | null) {\n    this._selectedYear = null;\n\n    if (value instanceof DateRange) {\n      const displayValue = value.start || value.end;\n\n      if (displayValue) {\n        this._selectedYear = this._dateAdapter.getYear(displayValue);\n      }\n    } else if (value) {\n      this._selectedYear = this._dateAdapter.getYear(value);\n    }\n  }\n}\n\nexport function isSameMultiYearView<D>(\n  dateAdapter: DateAdapter<D>, date1: D, date2: D, minDate: D | null, maxDate: D | null): boolean {\n  const year1 = dateAdapter.getYear(date1);\n  const year2 = dateAdapter.getYear(date2);\n  const startingYear = getStartingYear(dateAdapter, minDate, maxDate);\n  return Math.floor((year1 - startingYear) / yearsPerPage) ===\n          Math.floor((year2 - startingYear) / yearsPerPage);\n}\n\n/**\n * When the multi-year view is first opened, the active year will be in view.\n * So we compute how many years are between the active year and the *slot* where our\n * \"startingYear\" will render when paged into view.\n */\nexport function getActiveOffset<D>(\n  dateAdapter: DateAdapter<D>, activeDate: D, minDate: D | null, maxDate: D | null): number {\n  const activeYear = dateAdapter.getYear(activeDate);\n  return euclideanModulo((activeYear - getStartingYear(dateAdapter, minDate, maxDate)),\n    yearsPerPage);\n}\n\n/**\n * We pick a \"starting\" year such that either the maximum year would be at the end\n * or the minimum year would be at the beginning of a page.\n */\nfunction getStartingYear<D>(\n  dateAdapter: DateAdapter<D>, minDate: D | null, maxDate: D | null): number {\n  let startingYear = 0;\n  if (maxDate) {\n    const maxYear = dateAdapter.getYear(maxDate);\n    startingYear = maxYear - yearsPerPage + 1;\n  } else if (minDate) {\n    startingYear = dateAdapter.getYear(minDate);\n  }\n  return startingYear;\n}\n\n/** Gets remainder that is non-negative, even if first number is negative */\nfunction euclideanModulo (a: number, b: number): number {\n  return (a % b + b) % b;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  DOWN_ARROW,\n  END,\n  ENTER,\n  HOME,\n  LEFT_ARROW,\n  PAGE_DOWN,\n  PAGE_UP,\n  RIGHT_ARROW,\n  UP_ARROW,\n  SPACE,\n} from '@angular/cdk/keycodes';\nimport {\n  AfterContentInit,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  EventEmitter,\n  Inject,\n  Input,\n  Optional,\n  Output,\n  ViewChild,\n  ViewEncapsulation,\n  OnDestroy,\n} from '@angular/core';\nimport {DateAdapter, MAT_DATE_FORMATS, MatDateFormats} from '@angular/material/core';\nimport {Directionality} from '@angular/cdk/bidi';\nimport {\n  MatCalendarBody,\n  MatCalendarCell,\n  MatCalendarUserEvent,\n  MatCalendarCellClassFunction,\n} from './calendar-body';\nimport {createMissingDateImplError} from './datepicker-errors';\nimport {Subscription} from 'rxjs';\nimport {startWith} from 'rxjs/operators';\nimport {DateRange} from './date-selection-model';\n\n/**\n * An internal component used to display a single year in the datepicker.\n * @docs-private\n */\n@Component({\n  selector: 'mat-year-view',\n  templateUrl: 'year-view.html',\n  exportAs: 'matYearView',\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush\n})\nexport class MatYearView<D> implements AfterContentInit, OnDestroy {\n  private _rerenderSubscription = Subscription.EMPTY;\n\n  /** The date to display in this year view (everything other than the year is ignored). */\n  @Input()\n  get activeDate(): D { return this._activeDate; }\n  set activeDate(value: D) {\n    let oldActiveDate = this._activeDate;\n    const validDate =\n      this._dateAdapter.getValidDateOrNull(\n        this._dateAdapter.deserialize(value)\n      ) || this._dateAdapter.today();\n    this._activeDate = this._dateAdapter.clampDate(validDate, this.minDate, this.maxDate);\n    if (this._dateAdapter.getYear(oldActiveDate) !== this._dateAdapter.getYear(this._activeDate)) {\n      this._init();\n    }\n  }\n  private _activeDate: D;\n\n  /** The currently selected date. */\n  @Input()\n  get selected(): DateRange<D> | D | null { return this._selected; }\n  set selected(value: DateRange<D> | D | null) {\n    if (value instanceof DateRange) {\n      this._selected = value;\n    } else {\n      this._selected = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(value));\n    }\n\n    this._setSelectedMonth(value);\n  }\n  private _selected: DateRange<D> | D | null;\n\n  /** The minimum selectable date. */\n  @Input()\n  get minDate(): D | null { return this._minDate; }\n  set minDate(value: D | null) {\n    this._minDate = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(value));\n  }\n  private _minDate: D | null;\n\n  /** The maximum selectable date. */\n  @Input()\n  get maxDate(): D | null { return this._maxDate; }\n  set maxDate(value: D | null) {\n    this._maxDate = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(value));\n  }\n  private _maxDate: D | null;\n\n  /** A function used to filter which dates are selectable. */\n  @Input() dateFilter: (date: D) => boolean;\n\n  /** Function that can be used to add custom CSS classes to date cells. */\n  @Input() dateClass: MatCalendarCellClassFunction<D>;\n\n  /** Emits when a new month is selected. */\n  @Output() readonly selectedChange: EventEmitter<D> = new EventEmitter<D>();\n\n  /** Emits the selected month. This doesn't imply a change on the selected date */\n  @Output() readonly monthSelected: EventEmitter<D> = new EventEmitter<D>();\n\n  /** Emits when any date is activated. */\n  @Output() readonly activeDateChange: EventEmitter<D> = new EventEmitter<D>();\n\n  /** The body of calendar table */\n  @ViewChild(MatCalendarBody) _matCalendarBody: MatCalendarBody;\n\n  /** Grid of calendar cells representing the months of the year. */\n  _months: MatCalendarCell[][];\n\n  /** The label for this year (e.g. \"2017\"). */\n  _yearLabel: string;\n\n  /** The month in this year that today falls on. Null if today is in a different year. */\n  _todayMonth: number | null;\n\n  /**\n   * The month in this year that the selected Date falls on.\n   * Null if the selected Date is in a different year.\n   */\n  _selectedMonth: number | null;\n\n  constructor(private _changeDetectorRef: ChangeDetectorRef,\n              @Optional() @Inject(MAT_DATE_FORMATS) private _dateFormats: MatDateFormats,\n              @Optional() public _dateAdapter: DateAdapter<D>,\n              @Optional() private _dir?: Directionality) {\n\n    if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      if (!this._dateAdapter) {\n        throw createMissingDateImplError('DateAdapter');\n      }\n      if (!this._dateFormats) {\n        throw createMissingDateImplError('MAT_DATE_FORMATS');\n      }\n    }\n\n    this._activeDate = this._dateAdapter.today();\n  }\n\n  ngAfterContentInit() {\n    this._rerenderSubscription = this._dateAdapter.localeChanges\n      .pipe(startWith(null))\n      .subscribe(() => this._init());\n  }\n\n  ngOnDestroy() {\n    this._rerenderSubscription.unsubscribe();\n  }\n\n  /** Handles when a new month is selected. */\n  _monthSelected(event: MatCalendarUserEvent<number>) {\n    const month = event.value;\n    const normalizedDate =\n          this._dateAdapter.createDate(this._dateAdapter.getYear(this.activeDate), month, 1);\n\n    this.monthSelected.emit(normalizedDate);\n\n    const daysInMonth = this._dateAdapter.getNumDaysInMonth(normalizedDate);\n\n    this.selectedChange.emit(this._dateAdapter.createDate(\n        this._dateAdapter.getYear(this.activeDate), month,\n        Math.min(this._dateAdapter.getDate(this.activeDate), daysInMonth)));\n  }\n\n  /** Handles keydown events on the calendar body when calendar is in year view. */\n  _handleCalendarBodyKeydown(event: KeyboardEvent): void {\n    // TODO(mmalerba): We currently allow keyboard navigation to disabled dates, but just prevent\n    // disabled ones from being selected. This may not be ideal, we should look into whether\n    // navigation should skip over disabled dates, and if so, how to implement that efficiently.\n\n    const oldActiveDate = this._activeDate;\n    const isRtl = this._isRtl();\n\n    switch (event.keyCode) {\n      case LEFT_ARROW:\n        this.activeDate = this._dateAdapter.addCalendarMonths(this._activeDate, isRtl ? 1 : -1);\n        break;\n      case RIGHT_ARROW:\n        this.activeDate = this._dateAdapter.addCalendarMonths(this._activeDate, isRtl ? -1 : 1);\n        break;\n      case UP_ARROW:\n        this.activeDate = this._dateAdapter.addCalendarMonths(this._activeDate, -4);\n        break;\n      case DOWN_ARROW:\n        this.activeDate = this._dateAdapter.addCalendarMonths(this._activeDate, 4);\n        break;\n      case HOME:\n        this.activeDate = this._dateAdapter.addCalendarMonths(this._activeDate,\n            -this._dateAdapter.getMonth(this._activeDate));\n        break;\n      case END:\n        this.activeDate = this._dateAdapter.addCalendarMonths(this._activeDate,\n            11 - this._dateAdapter.getMonth(this._activeDate));\n        break;\n      case PAGE_UP:\n        this.activeDate =\n            this._dateAdapter.addCalendarYears(this._activeDate, event.altKey ? -10 : -1);\n        break;\n      case PAGE_DOWN:\n        this.activeDate =\n            this._dateAdapter.addCalendarYears(this._activeDate, event.altKey ? 10 : 1);\n        break;\n      case ENTER:\n      case SPACE:\n        this._monthSelected({value: this._dateAdapter.getMonth(this._activeDate), event});\n        break;\n      default:\n        // Don't prevent default or focus active cell on keys that we don't explicitly handle.\n        return;\n    }\n\n    if (this._dateAdapter.compareDate(oldActiveDate, this.activeDate)) {\n      this.activeDateChange.emit(this.activeDate);\n    }\n\n    this._focusActiveCell();\n    // Prevent unexpected default actions such as form submission.\n    event.preventDefault();\n  }\n\n  /** Initializes this year view. */\n  _init() {\n    this._setSelectedMonth(this.selected);\n    this._todayMonth = this._getMonthInCurrentYear(this._dateAdapter.today());\n    this._yearLabel = this._dateAdapter.getYearName(this.activeDate);\n\n    let monthNames = this._dateAdapter.getMonthNames('short');\n    // First row of months only contains 5 elements so we can fit the year label on the same row.\n    this._months = [[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]].map(row => row.map(\n        month => this._createCellForMonth(month, monthNames[month])));\n    this._changeDetectorRef.markForCheck();\n  }\n\n  /** Focuses the active cell after the microtask queue is empty. */\n  _focusActiveCell() {\n    this._matCalendarBody._focusActiveCell();\n  }\n\n  /**\n   * Gets the month in this year that the given Date falls on.\n   * Returns null if the given Date is in another year.\n   */\n  private _getMonthInCurrentYear(date: D | null) {\n    return date && this._dateAdapter.getYear(date) == this._dateAdapter.getYear(this.activeDate) ?\n        this._dateAdapter.getMonth(date) : null;\n  }\n\n  /** Creates an MatCalendarCell for the given month. */\n  private _createCellForMonth(month: number, monthName: string) {\n    const date = this._dateAdapter.createDate(this._dateAdapter.getYear(this.activeDate), month, 1);\n    const ariaLabel = this._dateAdapter.format(date, this._dateFormats.display.monthYearA11yLabel);\n    const cellClasses = this.dateClass ? this.dateClass(date, 'year') : undefined;\n\n    return new MatCalendarCell(month, monthName.toLocaleUpperCase(), ariaLabel,\n        this._shouldEnableMonth(month), cellClasses);\n  }\n\n  /** Whether the given month is enabled. */\n  private _shouldEnableMonth(month: number) {\n\n    const activeYear = this._dateAdapter.getYear(this.activeDate);\n\n    if (month === undefined || month === null ||\n        this._isYearAndMonthAfterMaxDate(activeYear, month) ||\n        this._isYearAndMonthBeforeMinDate(activeYear, month)) {\n      return false;\n    }\n\n    if (!this.dateFilter) {\n      return true;\n    }\n\n    const firstOfMonth = this._dateAdapter.createDate(activeYear, month, 1);\n\n    // If any date in the month is enabled count the month as enabled.\n    for (let date = firstOfMonth; this._dateAdapter.getMonth(date) == month;\n         date = this._dateAdapter.addCalendarDays(date, 1)) {\n      if (this.dateFilter(date)) {\n        return true;\n      }\n    }\n\n    return false;\n  }\n\n  /**\n   * Tests whether the combination month/year is after this.maxDate, considering\n   * just the month and year of this.maxDate\n   */\n  private _isYearAndMonthAfterMaxDate(year: number, month: number) {\n    if (this.maxDate) {\n      const maxYear = this._dateAdapter.getYear(this.maxDate);\n      const maxMonth = this._dateAdapter.getMonth(this.maxDate);\n\n      return year > maxYear || (year === maxYear && month > maxMonth);\n    }\n\n    return false;\n  }\n\n  /**\n   * Tests whether the combination month/year is before this.minDate, considering\n   * just the month and year of this.minDate\n   */\n  private _isYearAndMonthBeforeMinDate(year: number, month: number) {\n    if (this.minDate) {\n      const minYear = this._dateAdapter.getYear(this.minDate);\n      const minMonth = this._dateAdapter.getMonth(this.minDate);\n\n      return year < minYear || (year === minYear && month < minMonth);\n    }\n\n    return false;\n  }\n\n  /** Determines whether the user has the RTL layout direction. */\n  private _isRtl() {\n    return this._dir && this._dir.value === 'rtl';\n  }\n\n  /** Sets the currently-selected month based on a model value. */\n  private _setSelectedMonth(value: DateRange<D> | D | null) {\n    if (value instanceof DateRange) {\n      this._selectedMonth = this._getMonthInCurrentYear(value.start) ||\n                            this._getMonthInCurrentYear(value.end);\n    } else {\n      this._selectedMonth = this._getMonthInCurrentYear(value);\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ComponentPortal, ComponentType, Portal} from '@angular/cdk/portal';\nimport {\n  AfterContentInit,\n  AfterViewChecked,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  EventEmitter,\n  forwardRef,\n  Inject,\n  Input,\n  OnChanges,\n  OnDestroy,\n  Optional,\n  Output,\n  SimpleChanges,\n  ViewChild,\n  ViewEncapsulation,\n} from '@angular/core';\nimport {\n  DateAdapter,\n  MAT_DATE_FORMATS,\n  MatDateFormats,\n} from '@angular/material/core';\nimport {Subject, Subscription} from 'rxjs';\nimport {MatCalendarUserEvent, MatCalendarCellClassFunction} from './calendar-body';\nimport {createMissingDateImplError} from './datepicker-errors';\nimport {MatDatepickerIntl} from './datepicker-intl';\nimport {MatMonthView} from './month-view';\nimport {\n  getActiveOffset,\n  isSameMultiYearView,\n  MatMultiYearView,\n  yearsPerPage\n} from './multi-year-view';\nimport {MatYearView} from './year-view';\nimport {MAT_SINGLE_DATE_SELECTION_MODEL_PROVIDER, DateRange} from './date-selection-model';\n\n/**\n * Possible views for the calendar.\n * @docs-private\n */\nexport type MatCalendarView = 'month' | 'year' | 'multi-year';\n\n/** Default header for MatCalendar */\n@Component({\n  selector: 'mat-calendar-header',\n  templateUrl: 'calendar-header.html',\n  exportAs: 'matCalendarHeader',\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n})\nexport class MatCalendarHeader<D> {\n  constructor(private _intl: MatDatepickerIntl,\n              @Inject(forwardRef(() => MatCalendar)) public calendar: MatCalendar<D>,\n              @Optional() private _dateAdapter: DateAdapter<D>,\n              @Optional() @Inject(MAT_DATE_FORMATS) private _dateFormats: MatDateFormats,\n              changeDetectorRef: ChangeDetectorRef) {\n\n    this.calendar.stateChanges.subscribe(() => changeDetectorRef.markForCheck());\n  }\n\n  /** The label for the current calendar view. */\n  get periodButtonText(): string {\n    if (this.calendar.currentView == 'month') {\n      return this._dateAdapter\n          .format(this.calendar.activeDate, this._dateFormats.display.monthYearLabel)\n              .toLocaleUpperCase();\n    }\n    if (this.calendar.currentView == 'year') {\n      return this._dateAdapter.getYearName(this.calendar.activeDate);\n    }\n\n    // The offset from the active year to the \"slot\" for the starting year is the\n    // *actual* first rendered year in the multi-year view, and the last year is\n    // just yearsPerPage - 1 away.\n    const activeYear = this._dateAdapter.getYear(this.calendar.activeDate);\n    const minYearOfPage = activeYear - getActiveOffset(\n      this._dateAdapter, this.calendar.activeDate, this.calendar.minDate, this.calendar.maxDate);\n    const maxYearOfPage = minYearOfPage + yearsPerPage - 1;\n    const minYearName =\n      this._dateAdapter.getYearName(this._dateAdapter.createDate(minYearOfPage, 0, 1));\n    const maxYearName =\n      this._dateAdapter.getYearName(this._dateAdapter.createDate(maxYearOfPage, 0, 1));\n    return this._intl.formatYearRange(minYearName, maxYearName);\n  }\n\n  get periodButtonLabel(): string {\n    return this.calendar.currentView == 'month' ?\n        this._intl.switchToMultiYearViewLabel : this._intl.switchToMonthViewLabel;\n  }\n\n  /** The label for the previous button. */\n  get prevButtonLabel(): string {\n    return {\n      'month': this._intl.prevMonthLabel,\n      'year': this._intl.prevYearLabel,\n      'multi-year': this._intl.prevMultiYearLabel\n    }[this.calendar.currentView];\n  }\n\n  /** The label for the next button. */\n  get nextButtonLabel(): string {\n    return {\n      'month': this._intl.nextMonthLabel,\n      'year': this._intl.nextYearLabel,\n      'multi-year': this._intl.nextMultiYearLabel\n    }[this.calendar.currentView];\n  }\n\n  /** Handles user clicks on the period label. */\n  currentPeriodClicked(): void {\n    this.calendar.currentView = this.calendar.currentView == 'month' ? 'multi-year' : 'month';\n  }\n\n  /** Handles user clicks on the previous button. */\n  previousClicked(): void {\n    this.calendar.activeDate = this.calendar.currentView == 'month' ?\n        this._dateAdapter.addCalendarMonths(this.calendar.activeDate, -1) :\n            this._dateAdapter.addCalendarYears(\n                this.calendar.activeDate, this.calendar.currentView == 'year' ? -1 : -yearsPerPage\n            );\n  }\n\n  /** Handles user clicks on the next button. */\n  nextClicked(): void {\n    this.calendar.activeDate = this.calendar.currentView == 'month' ?\n        this._dateAdapter.addCalendarMonths(this.calendar.activeDate, 1) :\n            this._dateAdapter.addCalendarYears(\n                this.calendar.activeDate,\n                    this.calendar.currentView == 'year' ? 1 : yearsPerPage\n            );\n  }\n\n  /** Whether the previous period button is enabled. */\n  previousEnabled(): boolean {\n    if (!this.calendar.minDate) {\n      return true;\n    }\n    return !this.calendar.minDate ||\n        !this._isSameView(this.calendar.activeDate, this.calendar.minDate);\n  }\n\n  /** Whether the next period button is enabled. */\n  nextEnabled(): boolean {\n    return !this.calendar.maxDate ||\n        !this._isSameView(this.calendar.activeDate, this.calendar.maxDate);\n  }\n\n  /** Whether the two dates represent the same view in the current view mode (month or year). */\n  private _isSameView(date1: D, date2: D): boolean {\n    if (this.calendar.currentView == 'month') {\n      return this._dateAdapter.getYear(date1) == this._dateAdapter.getYear(date2) &&\n          this._dateAdapter.getMonth(date1) == this._dateAdapter.getMonth(date2);\n    }\n    if (this.calendar.currentView == 'year') {\n      return this._dateAdapter.getYear(date1) == this._dateAdapter.getYear(date2);\n    }\n    // Otherwise we are in 'multi-year' view.\n    return isSameMultiYearView(\n      this._dateAdapter, date1, date2, this.calendar.minDate, this.calendar.maxDate);\n  }\n}\n\n/**\n * A calendar that is used as part of the datepicker.\n * @docs-private\n */\n@Component({\n  selector: 'mat-calendar',\n  templateUrl: 'calendar.html',\n  styleUrls: ['calendar.css'],\n  host: {\n    'class': 'mat-calendar',\n  },\n  exportAs: 'matCalendar',\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  providers: [MAT_SINGLE_DATE_SELECTION_MODEL_PROVIDER]\n})\nexport class MatCalendar<D> implements AfterContentInit, AfterViewChecked, OnDestroy, OnChanges {\n  /** An input indicating the type of the header component, if set. */\n  @Input() headerComponent: ComponentType<any>;\n\n  /** A portal containing the header component type for this calendar. */\n  _calendarHeaderPortal: Portal<any>;\n\n  private _intlChanges: Subscription;\n\n  /**\n   * Used for scheduling that focus should be moved to the active cell on the next tick.\n   * We need to schedule it, rather than do it immediately, because we have to wait\n   * for Angular to re-evaluate the view children.\n   */\n  private _moveFocusOnNextTick = false;\n\n  /** A date representing the period (month or year) to start the calendar in. */\n  @Input()\n  get startAt(): D | null { return this._startAt; }\n  set startAt(value: D | null) {\n    this._startAt = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(value));\n  }\n  private _startAt: D | null;\n\n  /** Whether the calendar should be started in month or year view. */\n  @Input() startView: MatCalendarView = 'month';\n\n  /** The currently selected date. */\n  @Input()\n  get selected(): DateRange<D> | D | null { return this._selected; }\n  set selected(value: DateRange<D> | D | null) {\n    if (value instanceof DateRange) {\n      this._selected = value;\n    } else {\n      this._selected = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(value));\n    }\n  }\n  private _selected: DateRange<D> | D | null;\n\n  /** The minimum selectable date. */\n  @Input()\n  get minDate(): D | null { return this._minDate; }\n  set minDate(value: D | null) {\n    this._minDate = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(value));\n  }\n  private _minDate: D | null;\n\n  /** The maximum selectable date. */\n  @Input()\n  get maxDate(): D | null { return this._maxDate; }\n  set maxDate(value: D | null) {\n    this._maxDate = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(value));\n  }\n  private _maxDate: D | null;\n\n  /** Function used to filter which dates are selectable. */\n  @Input() dateFilter: (date: D) => boolean;\n\n  /** Function that can be used to add custom CSS classes to dates. */\n  @Input() dateClass: MatCalendarCellClassFunction<D>;\n\n  /** Start of the comparison range. */\n  @Input() comparisonStart: D | null;\n\n  /** End of the comparison range. */\n  @Input() comparisonEnd: D | null;\n\n  /**\n   * Emits when the currently selected date changes.\n   * @breaking-change 11.0.0 Emitted value to change to `D | null`.\n   */\n  @Output() readonly selectedChange: EventEmitter<D> = new EventEmitter<D>();\n\n  /**\n   * Emits the year chosen in multiyear view.\n   * This doesn't imply a change on the selected date.\n   */\n  @Output() readonly yearSelected: EventEmitter<D> = new EventEmitter<D>();\n\n  /**\n   * Emits the month chosen in year view.\n   * This doesn't imply a change on the selected date.\n   */\n  @Output() readonly monthSelected: EventEmitter<D> = new EventEmitter<D>();\n\n  /** Emits when any date is selected. */\n  @Output() readonly _userSelection: EventEmitter<MatCalendarUserEvent<D | null>> =\n      new EventEmitter<MatCalendarUserEvent<D | null>>();\n\n  /** Reference to the current month view component. */\n  @ViewChild(MatMonthView) monthView: MatMonthView<D>;\n\n  /** Reference to the current year view component. */\n  @ViewChild(MatYearView) yearView: MatYearView<D>;\n\n  /** Reference to the current multi-year view component. */\n  @ViewChild(MatMultiYearView) multiYearView: MatMultiYearView<D>;\n\n  /**\n   * The current active date. This determines which time period is shown and which date is\n   * highlighted when using keyboard navigation.\n   */\n  get activeDate(): D { return this._clampedActiveDate; }\n  set activeDate(value: D) {\n    this._clampedActiveDate = this._dateAdapter.clampDate(value, this.minDate, this.maxDate);\n    this.stateChanges.next();\n    this._changeDetectorRef.markForCheck();\n  }\n  private _clampedActiveDate: D;\n\n  /** Whether the calendar is in month view. */\n  get currentView(): MatCalendarView { return this._currentView; }\n  set currentView(value: MatCalendarView) {\n    this._currentView = value;\n    this._moveFocusOnNextTick = true;\n    this._changeDetectorRef.markForCheck();\n  }\n  private _currentView: MatCalendarView;\n\n  /**\n   * Emits whenever there is a state change that the header may need to respond to.\n   */\n  stateChanges = new Subject<void>();\n\n  constructor(_intl: MatDatepickerIntl,\n              @Optional() private _dateAdapter: DateAdapter<D>,\n              @Optional() @Inject(MAT_DATE_FORMATS) private _dateFormats: MatDateFormats,\n              private _changeDetectorRef: ChangeDetectorRef) {\n\n    if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      if (!this._dateAdapter) {\n        throw createMissingDateImplError('DateAdapter');\n      }\n\n      if (!this._dateFormats) {\n        throw createMissingDateImplError('MAT_DATE_FORMATS');\n      }\n    }\n\n    this._intlChanges = _intl.changes.subscribe(() => {\n      _changeDetectorRef.markForCheck();\n      this.stateChanges.next();\n    });\n  }\n\n  ngAfterContentInit() {\n    this._calendarHeaderPortal = new ComponentPortal(this.headerComponent || MatCalendarHeader);\n    this.activeDate = this.startAt || this._dateAdapter.today();\n\n    // Assign to the private property since we don't want to move focus on init.\n    this._currentView = this.startView;\n  }\n\n  ngAfterViewChecked() {\n    if (this._moveFocusOnNextTick) {\n      this._moveFocusOnNextTick = false;\n      this.focusActiveCell();\n    }\n  }\n\n  ngOnDestroy() {\n    this._intlChanges.unsubscribe();\n    this.stateChanges.complete();\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    const change =\n        changes['minDate'] || changes['maxDate'] || changes['dateFilter'];\n\n    if (change && !change.firstChange) {\n      const view = this._getCurrentViewComponent();\n\n      if (view) {\n        // We need to `detectChanges` manually here, because the `minDate`, `maxDate` etc. are\n        // passed down to the view via data bindings which won't be up-to-date when we call `_init`.\n        this._changeDetectorRef.detectChanges();\n        view._init();\n      }\n    }\n\n    this.stateChanges.next();\n  }\n\n  focusActiveCell() {\n    this._getCurrentViewComponent()._focusActiveCell(false);\n  }\n\n  /** Updates today's date after an update of the active date */\n  updateTodaysDate() {\n    const currentView = this.currentView;\n    let view: MatMonthView<D> | MatYearView<D> | MatMultiYearView<D>;\n\n    if (currentView === 'month') {\n      view = this.monthView;\n    } else if (currentView === 'year') {\n      view = this.yearView;\n    } else {\n      view = this.multiYearView;\n    }\n\n    view._init();\n  }\n\n  /** Handles date selection in the month view. */\n  _dateSelected(event: MatCalendarUserEvent<D | null>): void {\n    const date = event.value;\n\n    if (this.selected instanceof DateRange ||\n        (date && !this._dateAdapter.sameDate(date, this.selected))) {\n      // @breaking-change 11.0.0 remove non-null assertion\n      // once the `selectedChange` is allowed to be null.\n      this.selectedChange.emit(date!);\n    }\n\n    this._userSelection.emit(event);\n  }\n\n  /** Handles year selection in the multiyear view. */\n  _yearSelectedInMultiYearView(normalizedYear: D) {\n    this.yearSelected.emit(normalizedYear);\n  }\n\n  /** Handles month selection in the year view. */\n  _monthSelectedInYearView(normalizedMonth: D) {\n    this.monthSelected.emit(normalizedMonth);\n  }\n\n  /** Handles year/month selection in the multi-year/year views. */\n  _goToDateInView(date: D, view: 'month' | 'year' | 'multi-year'): void {\n    this.activeDate = date;\n    this.currentView = view;\n  }\n\n  /** Returns the component instance that corresponds to the current calendar view. */\n  private _getCurrentViewComponent() {\n    return this.monthView || this.yearView || this.multiYearView;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {\n  animate,\n  state,\n  style,\n  transition,\n  trigger,\n  AnimationTriggerMetadata,\n} from '@angular/animations';\n\n/**\n * Animations used by the Material datepicker.\n * @docs-private\n */\nexport const matDatepickerAnimations: {\n  readonly transformPanel: AnimationTriggerMetadata;\n  readonly fadeInCalendar: AnimationTriggerMetadata;\n} = {\n  /** Transforms the height of the datepicker's calendar. */\n  transformPanel: trigger('transformPanel', [\n    state('void', style({\n      opacity: 0,\n      transform: 'scale(1, 0.8)'\n    })),\n    transition('void => enter',  animate('120ms cubic-bezier(0, 0, 0.2, 1)', style({\n      opacity: 1,\n      transform: 'scale(1, 1)'\n    }))),\n    transition('* => void', animate('100ms linear', style({opacity: 0})))\n  ]),\n\n  /** Fades in the content of the calendar. */\n  fadeInCalendar: trigger('fadeInCalendar', [\n    state('void', style({opacity: 0})),\n    state('enter', style({opacity: 1})),\n\n    // TODO(crisbeto): this animation should be removed since it isn't quite on spec, but we\n    // need to keep it until #12440 gets in, otherwise the exit animation will look glitchy.\n    transition('void => *', animate('120ms 100ms cubic-bezier(0.55, 0, 0.55, 0.2)'))\n  ])\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directionality} from '@angular/cdk/bidi';\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {ESCAPE, UP_ARROW} from '@angular/cdk/keycodes';\nimport {\n  Overlay,\n  OverlayConfig,\n  OverlayRef,\n  ScrollStrategy,\n  FlexibleConnectedPositionStrategy,\n} from '@angular/cdk/overlay';\nimport {ComponentPortal, ComponentType} from '@angular/cdk/portal';\nimport {DOCUMENT} from '@angular/common';\nimport {\n  AfterViewInit,\n  ChangeDetectionStrategy,\n  Component,\n  ComponentRef,\n  ElementRef,\n  EventEmitter,\n  Inject,\n  InjectionToken,\n  Input,\n  NgZone,\n  OnDestroy,\n  Optional,\n  Output,\n  ViewChild,\n  ViewContainerRef,\n  ViewEncapsulation,\n  ChangeDetectorRef,\n  Directive,\n  OnChanges,\n  SimpleChanges,\n} from '@angular/core';\nimport {\n  CanColor,\n  CanColorCtor,\n  DateAdapter,\n  mixinColor,\n  ThemePalette,\n} from '@angular/material/core';\nimport {MatDialog, MatDialogRef} from '@angular/material/dialog';\nimport {merge, Subject, Observable, Subscription} from 'rxjs';\nimport {filter, take} from 'rxjs/operators';\nimport {MatCalendar} from './calendar';\nimport {matDatepickerAnimations} from './datepicker-animations';\nimport {createMissingDateImplError} from './datepicker-errors';\nimport {MatCalendarUserEvent, MatCalendarCellClassFunction} from './calendar-body';\nimport {DateFilterFn} from './datepicker-input-base';\nimport {\n  ExtractDateTypeFromSelection,\n  MatDateSelectionModel,\n  DateRange,\n} from './date-selection-model';\nimport {\n  MAT_DATE_RANGE_SELECTION_STRATEGY,\n  MatDateRangeSelectionStrategy,\n} from './date-range-selection-strategy';\n\n/** Used to generate a unique ID for each datepicker instance. */\nlet datepickerUid = 0;\n\n/** Injection token that determines the scroll handling while the calendar is open. */\nexport const MAT_DATEPICKER_SCROLL_STRATEGY =\n    new InjectionToken<() => ScrollStrategy>('mat-datepicker-scroll-strategy');\n\n/** @docs-private */\nexport function MAT_DATEPICKER_SCROLL_STRATEGY_FACTORY(overlay: Overlay): () => ScrollStrategy {\n  return () => overlay.scrollStrategies.reposition();\n}\n\n/** Possible positions for the datepicker dropdown along the X axis. */\nexport type DatepickerDropdownPositionX = 'start' | 'end';\n\n/** Possible positions for the datepicker dropdown along the Y axis. */\nexport type DatepickerDropdownPositionY = 'above' | 'below';\n\n/** @docs-private */\nexport const MAT_DATEPICKER_SCROLL_STRATEGY_FACTORY_PROVIDER = {\n  provide: MAT_DATEPICKER_SCROLL_STRATEGY,\n  deps: [Overlay],\n  useFactory: MAT_DATEPICKER_SCROLL_STRATEGY_FACTORY,\n};\n\n// Boilerplate for applying mixins to MatDatepickerContent.\n/** @docs-private */\nclass MatDatepickerContentBase {\n  constructor(public _elementRef: ElementRef) { }\n}\nconst _MatDatepickerContentMixinBase: CanColorCtor & typeof MatDatepickerContentBase =\n    mixinColor(MatDatepickerContentBase);\n\n/**\n * Component used as the content for the datepicker dialog and popup. We use this instead of using\n * MatCalendar directly as the content so we can control the initial focus. This also gives us a\n * place to put additional features of the popup that are not part of the calendar itself in the\n * future. (e.g. confirmation buttons).\n * @docs-private\n */\n@Component({\n  selector: 'mat-datepicker-content',\n  templateUrl: 'datepicker-content.html',\n  styleUrls: ['datepicker-content.css'],\n  host: {\n    'class': 'mat-datepicker-content',\n    '[@transformPanel]': '_animationState',\n    '(@transformPanel.done)': '_animationDone.next()',\n    '[class.mat-datepicker-content-touch]': 'datepicker.touchUi',\n  },\n  animations: [\n    matDatepickerAnimations.transformPanel,\n    matDatepickerAnimations.fadeInCalendar,\n  ],\n  exportAs: 'matDatepickerContent',\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  inputs: ['color'],\n})\nexport class MatDatepickerContent<S, D = ExtractDateTypeFromSelection<S>>\n  extends _MatDatepickerContentMixinBase implements AfterViewInit, OnDestroy, CanColor {\n  private _subscriptions = new Subscription();\n\n  /** Reference to the internal calendar component. */\n  @ViewChild(MatCalendar) _calendar: MatCalendar<D>;\n\n  /** Reference to the datepicker that created the overlay. */\n  datepicker: MatDatepickerBase<any, S, D>;\n\n  /** Start of the comparison range. */\n  comparisonStart: D | null;\n\n  /** End of the comparison range. */\n  comparisonEnd: D | null;\n\n  /** Whether the datepicker is above or below the input. */\n  _isAbove: boolean;\n\n  /** Current state of the animation. */\n  _animationState: 'enter' | 'void' = 'enter';\n\n  /** Emits when an animation has finished. */\n  _animationDone = new Subject<void>();\n\n  constructor(\n    elementRef: ElementRef,\n    /**\n     * @deprecated `_changeDetectorRef`, `_model` and `_rangeSelectionStrategy`\n     * parameters to become required.\n     * @breaking-change 11.0.0\n     */\n    private _changeDetectorRef?: ChangeDetectorRef,\n    private _model?: MatDateSelectionModel<S, D>,\n    private _dateAdapter?: DateAdapter<D>,\n    @Optional() @Inject(MAT_DATE_RANGE_SELECTION_STRATEGY)\n        private _rangeSelectionStrategy?: MatDateRangeSelectionStrategy<D>) {\n    super(elementRef);\n  }\n\n  ngAfterViewInit() {\n    // @breaking-change 11.0.0 Remove null check for `_changeDetectorRef.\n    if (this._changeDetectorRef) {\n      this._subscriptions.add(this.datepicker._stateChanges.subscribe(() => {\n        this._changeDetectorRef!.markForCheck();\n      }));\n    }\n\n    this._calendar.focusActiveCell();\n  }\n\n  ngOnDestroy() {\n    this._subscriptions.unsubscribe();\n    this._animationDone.complete();\n  }\n\n  _handleUserSelection(event: MatCalendarUserEvent<D | null>) {\n    // @breaking-change 11.0.0 Remove null checks for _model,\n    // _rangeSelectionStrategy and _dateAdapter.\n    if (this._model && this._dateAdapter) {\n      const selection = this._model.selection;\n      const value = event.value;\n      const isRange = selection instanceof DateRange;\n\n      // If we're selecting a range and we have a selection strategy, always pass the value through\n      // there. Otherwise don't assign null values to the model, unless we're selecting a range.\n      // A null value when picking a range means that the user cancelled the selection (e.g. by\n      // pressing escape), whereas when selecting a single value it means that the value didn't\n      // change. This isn't very intuitive, but it's here for backwards-compatibility.\n      if (isRange && this._rangeSelectionStrategy) {\n        const newSelection = this._rangeSelectionStrategy.selectionFinished(value,\n            selection as unknown as DateRange<D>, event.event);\n        this._model.updateSelection(newSelection as unknown as S, this);\n      } else if (value && (isRange ||\n                !this._dateAdapter.sameDate(value, selection as unknown as D))) {\n        this._model.add(value);\n      }\n    }\n\n    if (!this._model || this._model.isComplete()) {\n      this.datepicker.close();\n    }\n  }\n\n  _startExitAnimation() {\n    this._animationState = 'void';\n\n    // @breaking-change 11.0.0 Remove null check for `_changeDetectorRef`.\n    if (this._changeDetectorRef) {\n      this._changeDetectorRef.markForCheck();\n    }\n  }\n\n  _getSelected() {\n    // @breaking-change 11.0.0 Remove null check for `_model`.\n    return this._model ? this._model.selection as unknown as D | DateRange<D> | null : null;\n  }\n}\n\n/** Form control that can be associated with a datepicker. */\nexport interface MatDatepickerControl<D> {\n  getStartValue(): D | null;\n  getThemePalette(): ThemePalette;\n  min: D | null;\n  max: D | null;\n  disabled: boolean;\n  dateFilter: DateFilterFn<D>;\n  getConnectedOverlayOrigin(): ElementRef;\n  stateChanges: Observable<void>;\n}\n\n/** Base class for a datepicker. */\n@Directive()\nexport abstract class MatDatepickerBase<C extends MatDatepickerControl<D>, S,\n  D = ExtractDateTypeFromSelection<S>> implements OnDestroy, OnChanges {\n  private _scrollStrategy: () => ScrollStrategy;\n  private _inputStateChanges = Subscription.EMPTY;\n\n  /** An input indicating the type of the custom header component for the calendar, if set. */\n  @Input() calendarHeaderComponent: ComponentType<any>;\n\n  /** The date to open the calendar to initially. */\n  @Input()\n  get startAt(): D | null {\n    // If an explicit startAt is set we start there, otherwise we start at whatever the currently\n    // selected value is.\n    return this._startAt || (this._datepickerInput ? this._datepickerInput.getStartValue() : null);\n  }\n  set startAt(value: D | null) {\n    this._startAt = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(value));\n  }\n  private _startAt: D | null;\n\n  /** The view that the calendar should start in. */\n  @Input() startView: 'month' | 'year' | 'multi-year' = 'month';\n\n  /** Color palette to use on the datepicker's calendar. */\n  @Input()\n  get color(): ThemePalette {\n    return this._color ||\n        (this._datepickerInput ? this._datepickerInput.getThemePalette() : undefined);\n  }\n  set color(value: ThemePalette) {\n    this._color = value;\n  }\n  _color: ThemePalette;\n\n  /**\n   * Whether the calendar UI is in touch mode. In touch mode the calendar opens in a dialog rather\n   * than a popup and elements have more padding to allow for bigger touch targets.\n   */\n  @Input()\n  get touchUi(): boolean { return this._touchUi; }\n  set touchUi(value: boolean) {\n    this._touchUi = coerceBooleanProperty(value);\n  }\n  private _touchUi = false;\n\n  /** Whether the datepicker pop-up should be disabled. */\n  @Input()\n  get disabled(): boolean {\n    return this._disabled === undefined && this._datepickerInput ?\n        this._datepickerInput.disabled : !!this._disabled;\n  }\n  set disabled(value: boolean) {\n    const newValue = coerceBooleanProperty(value);\n\n    if (newValue !== this._disabled) {\n      this._disabled = newValue;\n      this._stateChanges.next(undefined);\n    }\n  }\n  private _disabled: boolean;\n\n  /** Preferred position of the datepicker in the X axis. */\n  @Input()\n  xPosition: DatepickerDropdownPositionX = 'start';\n\n  /** Preferred position of the datepicker in the Y axis. */\n  @Input()\n  yPosition: DatepickerDropdownPositionY = 'below';\n\n  /**\n   * Emits selected year in multiyear view.\n   * This doesn't imply a change on the selected date.\n   */\n  @Output() readonly yearSelected: EventEmitter<D> = new EventEmitter<D>();\n\n  /**\n   * Emits selected month in year view.\n   * This doesn't imply a change on the selected date.\n   */\n  @Output() readonly monthSelected: EventEmitter<D> = new EventEmitter<D>();\n\n  /** Classes to be passed to the date picker panel. Supports the same syntax as `ngClass`. */\n  @Input() panelClass: string | string[];\n\n  /** Function that can be used to add custom CSS classes to dates. */\n  @Input() dateClass: MatCalendarCellClassFunction<D>;\n\n  /** Emits when the datepicker has been opened. */\n  @Output('opened') openedStream: EventEmitter<void> = new EventEmitter<void>();\n\n  /** Emits when the datepicker has been closed. */\n  @Output('closed') closedStream: EventEmitter<void> = new EventEmitter<void>();\n\n\n  /** Whether the calendar is open. */\n  @Input()\n  get opened(): boolean { return this._opened; }\n  set opened(value: boolean) {\n    coerceBooleanProperty(value) ? this.open() : this.close();\n  }\n  private _opened = false;\n\n  /** The id for the datepicker calendar. */\n  id: string = `mat-datepicker-${datepickerUid++}`;\n\n  /** The minimum selectable date. */\n  _getMinDate(): D | null {\n    return this._datepickerInput && this._datepickerInput.min;\n  }\n\n  /** The maximum selectable date. */\n  _getMaxDate(): D | null {\n    return this._datepickerInput && this._datepickerInput.max;\n  }\n\n  _getDateFilter(): DateFilterFn<D> {\n    return this._datepickerInput && this._datepickerInput.dateFilter;\n  }\n\n  /** A reference to the overlay when the calendar is opened as a popup. */\n  private _popupRef: OverlayRef | null;\n\n  /** A reference to the dialog when the calendar is opened as a dialog. */\n  private _dialogRef: MatDialogRef<MatDatepickerContent<S, D>> | null;\n\n  /** Reference to the component instantiated in popup mode. */\n  private _popupComponentRef: ComponentRef<MatDatepickerContent<S, D>> | null;\n\n  /** The element that was focused before the datepicker was opened. */\n  private _focusedElementBeforeOpen: HTMLElement | null = null;\n\n  /** Unique class that will be added to the backdrop so that the test harnesses can look it up. */\n  private _backdropHarnessClass = `${this.id}-backdrop`;\n\n  /** The input element this datepicker is associated with. */\n  _datepickerInput: C;\n\n  /** Emits when the datepicker's state changes. */\n  readonly _stateChanges = new Subject<void>();\n\n  constructor(private _dialog: MatDialog,\n              private _overlay: Overlay,\n              private _ngZone: NgZone,\n              private _viewContainerRef: ViewContainerRef,\n              @Inject(MAT_DATEPICKER_SCROLL_STRATEGY) scrollStrategy: any,\n              @Optional() private _dateAdapter: DateAdapter<D>,\n              @Optional() private _dir: Directionality,\n              @Optional() @Inject(DOCUMENT) private _document: any,\n              private _model: MatDateSelectionModel<S, D>) {\n    if (!this._dateAdapter && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw createMissingDateImplError('DateAdapter');\n    }\n\n    this._scrollStrategy = scrollStrategy;\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    const positionChange = changes['xPosition'] || changes['yPosition'];\n\n    if (positionChange && !positionChange.firstChange && this._popupRef) {\n      this._setConnectedPositions(\n          this._popupRef.getConfig().positionStrategy as FlexibleConnectedPositionStrategy);\n\n      if (this.opened) {\n        this._popupRef.updatePosition();\n      }\n    }\n\n    this._stateChanges.next(undefined);\n  }\n\n  ngOnDestroy() {\n    this._destroyPopup();\n    this.close();\n    this._inputStateChanges.unsubscribe();\n    this._stateChanges.complete();\n  }\n\n  /** Selects the given date */\n  select(date: D): void {\n    this._model.add(date);\n  }\n\n  /** Emits the selected year in multiyear view */\n  _selectYear(normalizedYear: D): void {\n    this.yearSelected.emit(normalizedYear);\n  }\n\n  /** Emits selected month in year view */\n  _selectMonth(normalizedMonth: D): void {\n    this.monthSelected.emit(normalizedMonth);\n  }\n\n  /**\n   * Register an input with this datepicker.\n   * @param input The datepicker input to register with this datepicker.\n   * @returns Selection model that the input should hook itself up to.\n   */\n  _registerInput(input: C): MatDateSelectionModel<S, D> {\n    if (this._datepickerInput && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw Error('A MatDatepicker can only be associated with a single input.');\n    }\n    this._inputStateChanges.unsubscribe();\n    this._datepickerInput = input;\n    this._inputStateChanges =\n        input.stateChanges.subscribe(() => this._stateChanges.next(undefined));\n    return this._model;\n  }\n\n  /** Open the calendar. */\n  open(): void {\n    if (this._opened || this.disabled) {\n      return;\n    }\n    if (!this._datepickerInput && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw Error('Attempted to open an MatDatepicker with no associated input.');\n    }\n    if (this._document) {\n      this._focusedElementBeforeOpen = this._document.activeElement;\n    }\n\n    this.touchUi ? this._openAsDialog() : this._openAsPopup();\n    this._opened = true;\n    this.openedStream.emit();\n  }\n\n  /** Close the calendar. */\n  close(): void {\n    if (!this._opened) {\n      return;\n    }\n    if (this._popupComponentRef && this._popupRef) {\n      const instance = this._popupComponentRef.instance;\n      instance._startExitAnimation();\n      instance._animationDone.pipe(take(1)).subscribe(() => this._destroyPopup());\n    }\n    if (this._dialogRef) {\n      this._dialogRef.close();\n      this._dialogRef = null;\n    }\n\n    const completeClose = () => {\n      // The `_opened` could've been reset already if\n      // we got two events in quick succession.\n      if (this._opened) {\n        this._opened = false;\n        this.closedStream.emit();\n        this._focusedElementBeforeOpen = null;\n      }\n    };\n\n    if (this._focusedElementBeforeOpen &&\n      typeof this._focusedElementBeforeOpen.focus === 'function') {\n      // Because IE moves focus asynchronously, we can't count on it being restored before we've\n      // marked the datepicker as closed. If the event fires out of sequence and the element that\n      // we're refocusing opens the datepicker on focus, the user could be stuck with not being\n      // able to close the calendar at all. We work around it by making the logic, that marks\n      // the datepicker as closed, async as well.\n      this._focusedElementBeforeOpen.focus();\n      setTimeout(completeClose);\n    } else {\n      completeClose();\n    }\n  }\n\n  /** Open the calendar as a dialog. */\n  private _openAsDialog(): void {\n    // Usually this would be handled by `open` which ensures that we can only have one overlay\n    // open at a time, however since we reset the variables in async handlers some overlays\n    // may slip through if the user opens and closes multiple times in quick succession (e.g.\n    // by holding down the enter key).\n    if (this._dialogRef) {\n      this._dialogRef.close();\n    }\n\n    this._dialogRef = this._dialog.open<MatDatepickerContent<S, D>>(MatDatepickerContent, {\n      direction: this._dir ? this._dir.value : 'ltr',\n      viewContainerRef: this._viewContainerRef,\n      panelClass: 'mat-datepicker-dialog',\n\n      // These values are all the same as the defaults, but we set them explicitly so that the\n      // datepicker dialog behaves consistently even if the user changed the defaults.\n      hasBackdrop: true,\n      disableClose: false,\n      backdropClass: ['cdk-overlay-dark-backdrop', this._backdropHarnessClass],\n      width: '',\n      height: '',\n      minWidth: '',\n      minHeight: '',\n      maxWidth: '80vw',\n      maxHeight: '',\n      position: {},\n      autoFocus: true,\n\n      // `MatDialog` has focus restoration built in, however we want to disable it since the\n      // datepicker also has focus restoration for dropdown mode. We want to do this, in order\n      // to ensure that the timing is consistent between dropdown and dialog modes since `MatDialog`\n      // restores focus when the animation is finished, but the datepicker does it immediately.\n      // Furthermore, this avoids any conflicts where the datepicker consumer might move focus\n      // inside the `closed` event which is dispatched immediately.\n      restoreFocus: false\n    });\n\n    this._dialogRef.afterClosed().subscribe(() => this.close());\n    this._forwardContentValues(this._dialogRef.componentInstance);\n  }\n\n  /** Open the calendar as a popup. */\n  private _openAsPopup(): void {\n    const portal = new ComponentPortal<MatDatepickerContent<S, D>>(MatDatepickerContent,\n                                                                   this._viewContainerRef);\n\n    this._destroyPopup();\n    this._createPopup();\n    this._popupComponentRef = this._popupRef!.attach(portal);\n    this._forwardContentValues(this._popupComponentRef.instance);\n\n    // Update the position once the calendar has rendered.\n    this._ngZone.onStable.pipe(take(1)).subscribe(() => {\n      this._popupRef!.updatePosition();\n    });\n  }\n\n  /** Forwards relevant values from the datepicker to the datepicker content inside the overlay. */\n  protected _forwardContentValues(instance: MatDatepickerContent<S, D>) {\n    instance.datepicker = this;\n    instance.color = this.color;\n  }\n\n  /** Create the popup. */\n  private _createPopup(): void {\n    const positionStrategy = this._overlay.position()\n      .flexibleConnectedTo(this._datepickerInput.getConnectedOverlayOrigin())\n      .withTransformOriginOn('.mat-datepicker-content')\n      .withFlexibleDimensions(false)\n      .withViewportMargin(8)\n      .withLockedPosition();\n\n    const overlayConfig = new OverlayConfig({\n      positionStrategy: this._setConnectedPositions(positionStrategy),\n      hasBackdrop: true,\n      backdropClass: ['mat-overlay-transparent-backdrop', this._backdropHarnessClass],\n      direction: this._dir,\n      scrollStrategy: this._scrollStrategy(),\n      panelClass: 'mat-datepicker-popup',\n    });\n\n    this._popupRef = this._overlay.create(overlayConfig);\n    this._popupRef.overlayElement.setAttribute('role', 'dialog');\n\n    merge(\n      this._popupRef.backdropClick(),\n      this._popupRef.detachments(),\n      this._popupRef.keydownEvents().pipe(filter(event => {\n        // Closing on alt + up is only valid when there's an input associated with the datepicker.\n        return event.keyCode === ESCAPE ||\n               (this._datepickerInput && event.altKey && event.keyCode === UP_ARROW);\n      }))\n    ).subscribe(event => {\n      if (event) {\n        event.preventDefault();\n      }\n\n      this.close();\n    });\n  }\n\n  /** Destroys the current popup overlay. */\n  private _destroyPopup() {\n    if (this._popupRef) {\n      this._popupRef.dispose();\n      this._popupRef = this._popupComponentRef = null;\n    }\n  }\n\n  /** Sets the positions of the datepicker in dropdown mode based on the current configuration. */\n  private _setConnectedPositions(strategy: FlexibleConnectedPositionStrategy) {\n    const primaryX = this.xPosition === 'end' ? 'end' : 'start';\n    const secondaryX = primaryX === 'start' ? 'end' : 'start';\n    const primaryY = this.yPosition === 'above' ? 'bottom' : 'top';\n    const secondaryY = primaryY === 'top' ? 'bottom' : 'top';\n\n    return strategy.withPositions([\n      {\n        originX: primaryX,\n        originY: secondaryY,\n        overlayX: primaryX,\n        overlayY: primaryY\n      },\n      {\n        originX: primaryX,\n        originY: primaryY,\n        overlayX: primaryX,\n        overlayY: secondaryY\n      },\n      {\n        originX: secondaryX,\n        originY: secondaryY,\n        overlayX: secondaryX,\n        overlayY: primaryY\n      },\n      {\n        originX: secondaryX,\n        originY: primaryY,\n        overlayX: secondaryX,\n        overlayY: secondaryY\n      }\n    ]);\n  }\n\n  static ngAcceptInputType_disabled: BooleanInput;\n  static ngAcceptInputType_opened: BooleanInput;\n  static ngAcceptInputType_touchUi: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ChangeDetectionStrategy, Component, ViewEncapsulation} from '@angular/core';\nimport {MatDatepickerBase, MatDatepickerControl} from './datepicker-base';\nimport {MAT_SINGLE_DATE_SELECTION_MODEL_PROVIDER} from './date-selection-model';\n\n// TODO(mmalerba): We use a component instead of a directive here so the user can use implicit\n// template reference variables (e.g. #d vs #d=\"matDatepicker\"). We can change this to a directive\n// if angular adds support for `exportAs: '$implicit'` on directives.\n/** Component responsible for managing the datepicker popup/dialog. */\n@Component({\n  selector: 'mat-datepicker',\n  template: '',\n  exportAs: 'matDatepicker',\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  encapsulation: ViewEncapsulation.None,\n  providers: [MAT_SINGLE_DATE_SELECTION_MODEL_PROVIDER]\n})\nexport class MatDatepicker<D> extends MatDatepickerBase<MatDatepickerControl<D>, D | null, D> {\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {DOWN_ARROW} from '@angular/cdk/keycodes';\nimport {\n  Directive,\n  ElementRef,\n  EventEmitter,\n  Inject,\n  Input,\n  OnDestroy,\n  Optional,\n  Output,\n  AfterViewInit,\n  OnChanges,\n  SimpleChanges,\n} from '@angular/core';\nimport {\n  AbstractControl,\n  ControlValueAccessor,\n  ValidationErrors,\n  Validator,\n  ValidatorFn,\n} from '@angular/forms';\nimport {\n  DateAdapter,\n  MAT_DATE_FORMATS,\n  MatDateFormats,\n} from '@angular/material/core';\nimport {Subscription, Subject} from 'rxjs';\nimport {createMissingDateImplError} from './datepicker-errors';\nimport {\n  ExtractDateTypeFromSelection,\n  MatDateSelectionModel,\n  DateSelectionModelChange,\n} from './date-selection-model';\n\n/**\n * An event used for datepicker input and change events. We don't always have access to a native\n * input or change event because the event may have been triggered by the user clicking on the\n * calendar popup. For consistency, we always use MatDatepickerInputEvent instead.\n */\nexport class MatDatepickerInputEvent<D, S = unknown> {\n  /** The new value for the target datepicker input. */\n  value: D | null;\n\n  constructor(\n      /** Reference to the datepicker input component that emitted the event. */\n      public target: MatDatepickerInputBase<S, D>,\n      /** Reference to the native input element associated with the datepicker input. */\n      public targetElement: HTMLElement) {\n    this.value = this.target.value;\n  }\n}\n\n/** Function that can be used to filter out dates from a calendar. */\nexport type DateFilterFn<D> = (date: D | null) => boolean;\n\n/** Base class for datepicker inputs. */\n@Directive()\nexport abstract class MatDatepickerInputBase<S, D = ExtractDateTypeFromSelection<S>>\n  implements ControlValueAccessor, AfterViewInit, OnChanges, OnDestroy, Validator {\n\n  /** Whether the component has been initialized. */\n  private _isInitialized: boolean;\n\n  /** The value of the input. */\n  @Input()\n  get value(): D | null {\n    return this._model ? this._getValueFromModel(this._model.selection) : this._pendingValue;\n  }\n  set value(value: D | null) {\n    value = this._dateAdapter.deserialize(value);\n    this._lastValueValid = this._isValidValue(value);\n    value = this._dateAdapter.getValidDateOrNull(value);\n    const oldDate = this.value;\n    this._assignValue(value);\n    this._formatValue(value);\n\n    if (!this._dateAdapter.sameDate(oldDate, value)) {\n      this._valueChange.emit(value);\n    }\n  }\n  protected _model: MatDateSelectionModel<S, D> | undefined;\n\n  /** Whether the datepicker-input is disabled. */\n  @Input()\n  get disabled(): boolean { return !!this._disabled || this._parentDisabled(); }\n  set disabled(value: boolean) {\n    const newValue = coerceBooleanProperty(value);\n    const element = this._elementRef.nativeElement;\n\n    if (this._disabled !== newValue) {\n      this._disabled = newValue;\n      this.stateChanges.next(undefined);\n    }\n\n    // We need to null check the `blur` method, because it's undefined during SSR.\n    // In Ivy static bindings are invoked earlier, before the element is attached to the DOM.\n    // This can cause an error to be thrown in some browsers (IE/Edge) which assert that the\n    // element has been inserted.\n    if (newValue && this._isInitialized && element.blur) {\n      // Normally, native input elements automatically blur if they turn disabled. This behavior\n      // is problematic, because it would mean that it triggers another change detection cycle,\n      // which then causes a changed after checked error if the input element was focused before.\n      element.blur();\n    }\n  }\n  private _disabled: boolean;\n\n  /** Emits when a `change` event is fired on this `<input>`. */\n  @Output() readonly dateChange: EventEmitter<MatDatepickerInputEvent<D, S>> =\n      new EventEmitter<MatDatepickerInputEvent<D, S>>();\n\n  /** Emits when an `input` event is fired on this `<input>`. */\n  @Output() readonly dateInput: EventEmitter<MatDatepickerInputEvent<D, S>> =\n      new EventEmitter<MatDatepickerInputEvent<D, S>>();\n\n  /** Emits when the value changes (either due to user input or programmatic change). */\n  _valueChange = new EventEmitter<D | null>();\n\n  /** Emits when the internal state has changed */\n  stateChanges = new Subject<void>();\n\n  _onTouched = () => {};\n  _validatorOnChange = () => {};\n\n  protected _cvaOnChange: (value: any) => void = () => {};\n  private _valueChangesSubscription = Subscription.EMPTY;\n  private _localeSubscription = Subscription.EMPTY;\n\n  /**\n   * Since the value is kept on the model which is assigned in an Input,\n   * we might get a value before we have a model. This property keeps track\n   * of the value until we have somewhere to assign it.\n   */\n  private _pendingValue: D | null;\n\n  /** The form control validator for whether the input parses. */\n  private _parseValidator: ValidatorFn = (): ValidationErrors | null => {\n    return this._lastValueValid ?\n        null : {'matDatepickerParse': {'text': this._elementRef.nativeElement.value}};\n  }\n\n  /** The form control validator for the date filter. */\n  private _filterValidator: ValidatorFn = (control: AbstractControl): ValidationErrors | null => {\n    const controlValue = this._dateAdapter.getValidDateOrNull(\n      this._dateAdapter.deserialize(control.value));\n    const dateFilter = this._getDateFilter();\n    return !dateFilter || !controlValue || dateFilter(controlValue) ?\n        null : {'matDatepickerFilter': true};\n  }\n\n  /** The form control validator for the min date. */\n  private _minValidator: ValidatorFn = (control: AbstractControl): ValidationErrors | null => {\n    const controlValue = this._dateAdapter.getValidDateOrNull(\n      this._dateAdapter.deserialize(control.value));\n    const min = this._getMinDate();\n    return (!min || !controlValue ||\n        this._dateAdapter.compareDate(min, controlValue) <= 0) ?\n        null : {'matDatepickerMin': {'min': min, 'actual': controlValue}};\n  }\n\n  /** The form control validator for the max date. */\n  private _maxValidator: ValidatorFn = (control: AbstractControl): ValidationErrors | null => {\n    const controlValue = this._dateAdapter.getValidDateOrNull(\n      this._dateAdapter.deserialize(control.value));\n    const max = this._getMaxDate();\n    return (!max || !controlValue ||\n        this._dateAdapter.compareDate(max, controlValue) >= 0) ?\n        null : {'matDatepickerMax': {'max': max, 'actual': controlValue}};\n  }\n\n  /** Gets the base validator functions. */\n  protected _getValidators(): ValidatorFn[] {\n    return [this._parseValidator, this._minValidator, this._maxValidator, this._filterValidator];\n  }\n\n  /** Gets the minimum date for the input. Used for validation. */\n  abstract _getMinDate(): D | null;\n\n  /** Gets the maximum date for the input. Used for validation. */\n  abstract _getMaxDate(): D | null;\n\n  /** Gets the date filter function. Used for validation. */\n  protected abstract _getDateFilter(): DateFilterFn<D> | undefined;\n\n  /** Registers a date selection model with the input. */\n  _registerModel(model: MatDateSelectionModel<S, D>): void {\n    this._model = model;\n    this._valueChangesSubscription.unsubscribe();\n\n    if (this._pendingValue) {\n      this._assignValue(this._pendingValue);\n    }\n\n    this._valueChangesSubscription = this._model.selectionChanged.subscribe(event => {\n      if (event.source !== this) {\n        const value = this._getValueFromModel(event.selection);\n        this._lastValueValid = this._isValidValue(value);\n        this._cvaOnChange(value);\n        this._onTouched();\n        this._formatValue(value);\n\n        // Note that we can't wrap the entire block with this logic, because for the range inputs\n        // we want to revalidate whenever either one of the inputs changes and we don't have a\n        // good way of distinguishing it at the moment.\n        if (this._canEmitChangeEvent(event)) {\n          this.dateInput.emit(new MatDatepickerInputEvent(this, this._elementRef.nativeElement));\n          this.dateChange.emit(new MatDatepickerInputEvent(this, this._elementRef.nativeElement));\n        }\n\n        if (this._outsideValueChanged) {\n          this._outsideValueChanged();\n        }\n      }\n    });\n  }\n\n  /** Opens the popup associated with the input. */\n  protected abstract _openPopup(): void;\n\n  /** Assigns a value to the input's model. */\n  protected abstract _assignValueToModel(model: D | null): void;\n\n  /** Converts a value from the model into a native value for the input. */\n  protected abstract _getValueFromModel(modelValue: S): D | null;\n\n  /** Combined form control validator for this input. */\n  protected abstract _validator: ValidatorFn | null;\n\n  /**\n   * Callback that'll be invoked when the selection model is changed\n   * from somewhere that's not the current datepicker input.\n   */\n  protected abstract _outsideValueChanged?: () => void;\n\n  /** Predicate that determines whether we're allowed to emit a particular change event. */\n  protected abstract _canEmitChangeEvent(event: DateSelectionModelChange<S>): boolean;\n\n  /** Whether the last value set on the input was valid. */\n  protected _lastValueValid = false;\n\n  constructor(\n      protected _elementRef: ElementRef<HTMLInputElement>,\n      @Optional() public _dateAdapter: DateAdapter<D>,\n      @Optional() @Inject(MAT_DATE_FORMATS) private _dateFormats: MatDateFormats) {\n\n    if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      if (!this._dateAdapter) {\n        throw createMissingDateImplError('DateAdapter');\n      }\n      if (!this._dateFormats) {\n        throw createMissingDateImplError('MAT_DATE_FORMATS');\n      }\n    }\n\n    // Update the displayed date when the locale changes.\n    this._localeSubscription = _dateAdapter.localeChanges.subscribe(() => {\n      this.value = this.value;\n    });\n  }\n\n  ngAfterViewInit() {\n    this._isInitialized = true;\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    if (dateInputsHaveChanged(changes, this._dateAdapter)) {\n      this.stateChanges.next(undefined);\n    }\n  }\n\n  ngOnDestroy() {\n    this._valueChangesSubscription.unsubscribe();\n    this._localeSubscription.unsubscribe();\n    this._valueChange.complete();\n    this.stateChanges.complete();\n  }\n\n  /** @docs-private */\n  registerOnValidatorChange(fn: () => void): void {\n    this._validatorOnChange = fn;\n  }\n\n  /** @docs-private */\n  validate(c: AbstractControl): ValidationErrors | null {\n    return this._validator ? this._validator(c) : null;\n  }\n\n  // Implemented as part of ControlValueAccessor.\n  writeValue(value: D): void {\n    this.value = value;\n  }\n\n  // Implemented as part of ControlValueAccessor.\n  registerOnChange(fn: (value: any) => void): void {\n    this._cvaOnChange = fn;\n  }\n\n  // Implemented as part of ControlValueAccessor.\n  registerOnTouched(fn: () => void): void {\n    this._onTouched = fn;\n  }\n\n  // Implemented as part of ControlValueAccessor.\n  setDisabledState(isDisabled: boolean): void {\n    this.disabled = isDisabled;\n  }\n\n  _onKeydown(event: KeyboardEvent) {\n    const isAltDownArrow = event.altKey && event.keyCode === DOWN_ARROW;\n\n    if (isAltDownArrow && !this._elementRef.nativeElement.readOnly) {\n      this._openPopup();\n      event.preventDefault();\n    }\n  }\n\n  _onInput(value: string) {\n    const lastValueWasValid = this._lastValueValid;\n    let date = this._dateAdapter.parse(value, this._dateFormats.parse.dateInput);\n    this._lastValueValid = this._isValidValue(date);\n    date = this._dateAdapter.getValidDateOrNull(date);\n\n    if (!this._dateAdapter.sameDate(date, this.value)) {\n      this._assignValue(date);\n      this._cvaOnChange(date);\n      this._valueChange.emit(date);\n      this.dateInput.emit(new MatDatepickerInputEvent(this, this._elementRef.nativeElement));\n    } else {\n      // Call the CVA change handler for invalid values\n      // since this is what marks the control as dirty.\n      if (value && !this.value) {\n        this._cvaOnChange(date);\n      }\n\n      if (lastValueWasValid !== this._lastValueValid) {\n        this._validatorOnChange();\n      }\n    }\n  }\n\n  _onChange() {\n    this.dateChange.emit(new MatDatepickerInputEvent(this, this._elementRef.nativeElement));\n  }\n\n  /** Handles blur events on the input. */\n  _onBlur() {\n    // Reformat the input only if we have a valid value.\n    if (this.value) {\n      this._formatValue(this.value);\n    }\n\n    this._onTouched();\n  }\n\n  /** Formats a value and sets it on the input element. */\n  protected _formatValue(value: D | null) {\n    this._elementRef.nativeElement.value =\n        value ? this._dateAdapter.format(value, this._dateFormats.display.dateInput) : '';\n  }\n\n  /** Assigns a value to the model. */\n  private _assignValue(value: D | null) {\n    // We may get some incoming values before the model was\n    // assigned. Save the value so that we can assign it later.\n    if (this._model) {\n      this._assignValueToModel(value);\n      this._pendingValue = null;\n    } else {\n      this._pendingValue = value;\n    }\n  }\n\n  /** Whether a value is considered valid. */\n  private _isValidValue(value: D | null): boolean {\n    return !value || this._dateAdapter.isValid(value);\n  }\n\n  /**\n   * Checks whether a parent control is disabled. This is in place so that it can be overridden\n   * by inputs extending this one which can be placed inside of a group that can be disabled.\n   */\n  protected _parentDisabled() {\n    return false;\n  }\n\n  // Accept `any` to avoid conflicts with other directives on `<input>` that\n  // may accept different types.\n  static ngAcceptInputType_value: any;\n  static ngAcceptInputType_disabled: BooleanInput;\n}\n\n/**\n * Checks whether the `SimpleChanges` object from an `ngOnChanges`\n * callback has any changes, accounting for date objects.\n */\nexport function dateInputsHaveChanged(\n  changes: SimpleChanges,\n  adapter: DateAdapter<unknown>): boolean {\n  const keys = Object.keys(changes);\n\n  for (let key of keys) {\n    const {previousValue, currentValue} = changes[key];\n\n    if (adapter.isDateInstance(previousValue) && adapter.isDateInstance(currentValue)) {\n      if (!adapter.sameDate(previousValue, currentValue)) {\n        return true;\n      }\n    } else {\n      return true;\n    }\n  }\n\n  return false;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  Directive,\n  ElementRef,\n  forwardRef,\n  Inject,\n  Input,\n  Optional,\n} from '@angular/core';\nimport {\n  NG_VALIDATORS,\n  NG_VALUE_ACCESSOR,\n  ValidatorFn,\n  Validators,\n} from '@angular/forms';\nimport {\n  DateAdapter,\n  MAT_DATE_FORMATS,\n  MatDateFormats,\n  ThemePalette,\n} from '@angular/material/core';\nimport {MatFormField, MAT_FORM_FIELD} from '@angular/material/form-field';\nimport {MAT_INPUT_VALUE_ACCESSOR} from '@angular/material/input';\nimport {MatDatepicker} from './datepicker';\nimport {MatDatepickerInputBase, DateFilterFn} from './datepicker-input-base';\nimport {MatDatepickerControl} from './datepicker-base';\n\n/** @docs-private */\nexport const MAT_DATEPICKER_VALUE_ACCESSOR: any = {\n  provide: NG_VALUE_ACCESSOR,\n  useExisting: forwardRef(() => MatDatepickerInput),\n  multi: true\n};\n\n/** @docs-private */\nexport const MAT_DATEPICKER_VALIDATORS: any = {\n  provide: NG_VALIDATORS,\n  useExisting: forwardRef(() => MatDatepickerInput),\n  multi: true\n};\n\n/** Directive used to connect an input to a MatDatepicker. */\n@Directive({\n  selector: 'input[matDatepicker]',\n  providers: [\n    MAT_DATEPICKER_VALUE_ACCESSOR,\n    MAT_DATEPICKER_VALIDATORS,\n    {provide: MAT_INPUT_VALUE_ACCESSOR, useExisting: MatDatepickerInput},\n  ],\n  host: {\n    'class': 'mat-datepicker-input',\n    '[attr.aria-haspopup]': '_datepicker ? \"dialog\" : null',\n    '[attr.aria-owns]': '(_datepicker?.opened && _datepicker.id) || null',\n    '[attr.min]': 'min ? _dateAdapter.toIso8601(min) : null',\n    '[attr.max]': 'max ? _dateAdapter.toIso8601(max) : null',\n    // Used by the test harness to tie this input to its calendar. We can't depend on\n    // `aria-owns` for this, because it's only defined while the calendar is open.\n    '[attr.data-mat-calendar]': '_datepicker ? _datepicker.id : null',\n    '[disabled]': 'disabled',\n    '(input)': '_onInput($event.target.value)',\n    '(change)': '_onChange()',\n    '(blur)': '_onBlur()',\n    '(keydown)': '_onKeydown($event)',\n  },\n  exportAs: 'matDatepickerInput',\n})\nexport class MatDatepickerInput<D> extends MatDatepickerInputBase<D | null, D>\n  implements MatDatepickerControl<D | null> {\n  /** The datepicker that this input is associated with. */\n  @Input()\n  set matDatepicker(datepicker: MatDatepicker<D>) {\n    if (datepicker) {\n      this._datepicker = datepicker;\n      this._registerModel(datepicker._registerInput(this));\n    }\n  }\n  _datepicker: MatDatepicker<D>;\n\n  /** The minimum valid date. */\n  @Input()\n  get min(): D | null { return this._min; }\n  set min(value: D | null) {\n    const validValue = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(value));\n\n    if (!this._dateAdapter.sameDate(validValue, this._min)) {\n      this._min = validValue;\n      this._validatorOnChange();\n    }\n  }\n  private _min: D | null;\n\n  /** The maximum valid date. */\n  @Input()\n  get max(): D | null { return this._max; }\n  set max(value: D | null) {\n    const validValue = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(value));\n\n    if (!this._dateAdapter.sameDate(validValue, this._max)) {\n      this._max = validValue;\n      this._validatorOnChange();\n    }\n  }\n  private _max: D | null;\n\n  /** Function that can be used to filter out dates within the datepicker. */\n  @Input('matDatepickerFilter')\n  get dateFilter() { return this._dateFilter; }\n  set dateFilter(value: DateFilterFn<D | null>) {\n    this._dateFilter = value;\n    this._validatorOnChange();\n  }\n  private _dateFilter: DateFilterFn<D | null>;\n\n  /** The combined form control validator for this input. */\n  protected _validator: ValidatorFn | null;\n\n  constructor(\n      elementRef: ElementRef<HTMLInputElement>,\n      @Optional() dateAdapter: DateAdapter<D>,\n      @Optional() @Inject(MAT_DATE_FORMATS) dateFormats: MatDateFormats,\n      @Optional() @Inject(MAT_FORM_FIELD) private _formField: MatFormField) {\n    super(elementRef, dateAdapter, dateFormats);\n    this._validator = Validators.compose(super._getValidators());\n  }\n\n  /**\n   * Gets the element that the datepicker popup should be connected to.\n   * @return The element to connect the popup to.\n   */\n  getConnectedOverlayOrigin(): ElementRef {\n    return this._formField ? this._formField.getConnectedOverlayOrigin() : this._elementRef;\n  }\n\n  /** Returns the palette used by the input's form field, if any. */\n  getThemePalette(): ThemePalette {\n    return this._formField ? this._formField.color : undefined;\n  }\n\n  /** Gets the value at which the calendar should start. */\n  getStartValue(): D | null {\n    return this.value;\n  }\n\n  /**\n   * @deprecated\n   * @breaking-change 8.0.0 Use `getConnectedOverlayOrigin` instead\n   */\n  getPopupConnectionElementRef(): ElementRef {\n    return this.getConnectedOverlayOrigin();\n  }\n\n  /** Opens the associated datepicker. */\n  protected _openPopup(): void {\n    if (this._datepicker) {\n      this._datepicker.open();\n    }\n  }\n\n  protected _getValueFromModel(modelValue: D | null): D | null {\n    return modelValue;\n  }\n\n  protected _assignValueToModel(value: D | null): void {\n    if (this._model) {\n      this._model.updateSelection(value, this);\n    }\n  }\n\n  /** Gets the input's minimum date. */\n  _getMinDate() {\n    return this._min;\n  }\n\n  /** Gets the input's maximum date. */\n  _getMaxDate() {\n    return this._max;\n  }\n\n  /** Gets the input's date filtering function. */\n  protected _getDateFilter() {\n    return this._dateFilter;\n  }\n\n  protected _canEmitChangeEvent() {\n    return true;\n  }\n\n  // Unnecessary when selecting a single date.\n  protected _outsideValueChanged: undefined;\n\n  // Accept `any` to avoid conflicts with other directives on `<input>` that\n  // may accept different types.\n  static ngAcceptInputType_value: any;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {\n  AfterContentInit,\n  Attribute,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ContentChild,\n  Directive,\n  Input,\n  OnChanges,\n  OnDestroy,\n  SimpleChanges,\n  ViewEncapsulation,\n  ViewChild,\n} from '@angular/core';\nimport {MatButton} from '@angular/material/button';\nimport {merge, of as observableOf, Subscription} from 'rxjs';\nimport {MatDatepickerIntl} from './datepicker-intl';\nimport {MatDatepickerBase, MatDatepickerControl} from './datepicker-base';\n\n\n/** Can be used to override the icon of a `matDatepickerToggle`. */\n@Directive({\n  selector: '[matDatepickerToggleIcon]'\n})\nexport class MatDatepickerToggleIcon {}\n\n\n@Component({\n  selector: 'mat-datepicker-toggle',\n  templateUrl: 'datepicker-toggle.html',\n  styleUrls: ['datepicker-toggle.css'],\n  host: {\n    'class': 'mat-datepicker-toggle',\n    // Always set the tabindex to -1 so that it doesn't overlap with any custom tabindex the\n    // consumer may have provided, while still being able to receive focus.\n    '[attr.tabindex]': 'disabled ? null : -1',\n    '[class.mat-datepicker-toggle-active]': 'datepicker && datepicker.opened',\n    '[class.mat-accent]': 'datepicker && datepicker.color === \"accent\"',\n    '[class.mat-warn]': 'datepicker && datepicker.color === \"warn\"',\n    // Used by the test harness to tie this toggle to its datepicker.\n    '[attr.data-mat-calendar]': 'datepicker ? datepicker.id : null',\n    '(focus)': '_button.focus()',\n  },\n  exportAs: 'matDatepickerToggle',\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n})\nexport class MatDatepickerToggle<D> implements AfterContentInit, OnChanges, OnDestroy {\n  private _stateChanges = Subscription.EMPTY;\n\n  /** Datepicker instance that the button will toggle. */\n  @Input('for') datepicker: MatDatepickerBase<MatDatepickerControl<any>, D>;\n\n  /** Tabindex for the toggle. */\n  @Input() tabIndex: number | null;\n\n  /** Whether the toggle button is disabled. */\n  @Input()\n  get disabled(): boolean {\n    if (this._disabled === undefined && this.datepicker) {\n      return this.datepicker.disabled;\n    }\n\n    return !!this._disabled;\n  }\n  set disabled(value: boolean) {\n    this._disabled = coerceBooleanProperty(value);\n  }\n  private _disabled: boolean;\n\n  /** Whether ripples on the toggle should be disabled. */\n  @Input() disableRipple: boolean;\n\n  /** Custom icon set by the consumer. */\n  @ContentChild(MatDatepickerToggleIcon) _customIcon: MatDatepickerToggleIcon;\n\n  /** Underlying button element. */\n  @ViewChild('button') _button: MatButton;\n\n  constructor(\n    public _intl: MatDatepickerIntl,\n    private _changeDetectorRef: ChangeDetectorRef,\n    @Attribute('tabindex') defaultTabIndex: string) {\n\n    const parsedTabIndex = Number(defaultTabIndex);\n    this.tabIndex = (parsedTabIndex || parsedTabIndex === 0) ? parsedTabIndex : null;\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    if (changes['datepicker']) {\n      this._watchStateChanges();\n    }\n  }\n\n  ngOnDestroy() {\n    this._stateChanges.unsubscribe();\n  }\n\n  ngAfterContentInit() {\n    this._watchStateChanges();\n  }\n\n  _open(event: Event): void {\n    if (this.datepicker && !this.disabled) {\n      this.datepicker.open();\n      event.stopPropagation();\n    }\n  }\n\n  private _watchStateChanges() {\n    const datepickerStateChanged = this.datepicker ? this.datepicker._stateChanges : observableOf();\n    const inputStateChanged = this.datepicker && this.datepicker._datepickerInput ?\n        this.datepicker._datepickerInput.stateChanges : observableOf();\n    const datepickerToggled = this.datepicker ?\n        merge(this.datepicker.openedStream, this.datepicker.closedStream) :\n        observableOf();\n\n    this._stateChanges.unsubscribe();\n    this._stateChanges = merge(\n      this._intl.changes,\n      datepickerStateChanged,\n      inputStateChanged,\n      datepickerToggled\n    ).subscribe(() => this._changeDetectorRef.markForCheck());\n  }\n\n  static ngAcceptInputType_disabled: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  Directive,\n  ElementRef,\n  Optional,\n  InjectionToken,\n  Inject,\n  OnInit,\n  Injector,\n  InjectFlags,\n  DoCheck,\n} from '@angular/core';\nimport {\n  NG_VALUE_ACCESSOR,\n  NG_VALIDATORS,\n  NgForm,\n  FormGroupDirective,\n  NgControl,\n  ValidatorFn,\n  Validators,\n  AbstractControl,\n  ValidationErrors,\n} from '@angular/forms';\nimport {\n  CanUpdateErrorState,\n  CanUpdateErrorStateCtor,\n  mixinErrorState,\n  MAT_DATE_FORMATS,\n  DateAdapter,\n  MatDateFormats,\n  ErrorStateMatcher,\n} from '@angular/material/core';\nimport {BooleanInput} from '@angular/cdk/coercion';\nimport {BACKSPACE} from '@angular/cdk/keycodes';\nimport {MatDatepickerInputBase, DateFilterFn} from './datepicker-input-base';\nimport {DateRange, DateSelectionModelChange} from './date-selection-model';\n\n/** Parent component that should be wrapped around `MatStartDate` and `MatEndDate`. */\nexport interface MatDateRangeInputParent<D> {\n  id: string;\n  min: D | null;\n  max: D | null;\n  dateFilter: DateFilterFn<D>;\n  rangePicker: {\n    opened: boolean;\n    id: string;\n  };\n  _startInput: MatDateRangeInputPartBase<D>;\n  _endInput: MatDateRangeInputPartBase<D>;\n  _groupDisabled: boolean;\n  _handleChildValueChange(): void;\n  _openDatepicker(): void;\n}\n\n/**\n * Used to provide the date range input wrapper component\n * to the parts without circular dependencies.\n */\nexport const MAT_DATE_RANGE_INPUT_PARENT =\n    new InjectionToken<MatDateRangeInputParent<unknown>>('MAT_DATE_RANGE_INPUT_PARENT');\n\n/**\n * Base class for the individual inputs that can be projected inside a `mat-date-range-input`.\n */\n@Directive()\nabstract class MatDateRangeInputPartBase<D>\n  extends MatDatepickerInputBase<DateRange<D>> implements OnInit, DoCheck {\n\n  /** @docs-private */\n  ngControl: NgControl;\n\n  /** @docs-private */\n  abstract updateErrorState(): void;\n\n  protected abstract _validator: ValidatorFn | null;\n  protected abstract _assignValueToModel(value: D | null): void;\n  protected abstract _getValueFromModel(modelValue: DateRange<D>): D | null;\n\n  constructor(\n    @Inject(MAT_DATE_RANGE_INPUT_PARENT) public _rangeInput: MatDateRangeInputParent<D>,\n    elementRef: ElementRef<HTMLInputElement>,\n    public _defaultErrorStateMatcher: ErrorStateMatcher,\n    private _injector: Injector,\n    @Optional() public _parentForm: NgForm,\n    @Optional() public _parentFormGroup: FormGroupDirective,\n    @Optional() dateAdapter: DateAdapter<D>,\n    @Optional() @Inject(MAT_DATE_FORMATS) dateFormats: MatDateFormats) {\n    super(elementRef, dateAdapter, dateFormats);\n  }\n\n  ngOnInit() {\n    // We need the date input to provide itself as a `ControlValueAccessor` and a `Validator`, while\n    // injecting its `NgControl` so that the error state is handled correctly. This introduces a\n    // circular dependency, because both `ControlValueAccessor` and `Validator` depend on the input\n    // itself. Usually we can work around it for the CVA, but there's no API to do it for the\n    // validator. We work around it here by injecting the `NgControl` in `ngOnInit`, after\n    // everything has been resolved.\n    const ngControl = this._injector.get(NgControl, null, InjectFlags.Self);\n\n    if (ngControl) {\n      this.ngControl = ngControl;\n    }\n  }\n\n  ngDoCheck() {\n    if (this.ngControl) {\n      // We need to re-evaluate this on every change detection cycle, because there are some\n      // error triggers that we can't subscribe to (e.g. parent form submissions). This means\n      // that whatever logic is in here has to be super lean or we risk destroying the performance.\n      this.updateErrorState();\n    }\n  }\n\n  /** Gets whether the input is empty. */\n  isEmpty(): boolean {\n    return this._elementRef.nativeElement.value.length === 0;\n  }\n\n  /** Gets the placeholder of the input. */\n  _getPlaceholder() {\n    return this._elementRef.nativeElement.placeholder;\n  }\n\n  /** Focuses the input. */\n  focus(): void {\n    this._elementRef.nativeElement.focus();\n  }\n\n  /** Handles `input` events on the input element. */\n  _onInput(value: string) {\n    super._onInput(value);\n    this._rangeInput._handleChildValueChange();\n  }\n\n  /** Opens the datepicker associated with the input. */\n  protected _openPopup(): void {\n    this._rangeInput._openDatepicker();\n  }\n\n  /** Gets the minimum date from the range input. */\n  _getMinDate() {\n    return this._rangeInput.min;\n  }\n\n  /** Gets the maximum date from the range input. */\n  _getMaxDate() {\n    return this._rangeInput.max;\n  }\n\n  /** Gets the date filter function from the range input. */\n  protected _getDateFilter() {\n    return this._rangeInput.dateFilter;\n  }\n\n  protected _outsideValueChanged = () => {\n    // Whenever the value changes outside the input we need to revalidate, because\n    // the validation state of each of the inputs depends on the other one.\n    this._validatorOnChange();\n  }\n\n  protected _parentDisabled() {\n    return this._rangeInput._groupDisabled;\n  }\n}\n\nconst _MatDateRangeInputBase:\n    CanUpdateErrorStateCtor & typeof MatDateRangeInputPartBase =\n    // Needs to be `as any`, because the base class is abstract.\n    mixinErrorState(MatDateRangeInputPartBase as any);\n\n/** Input for entering the start date in a `mat-date-range-input`. */\n@Directive({\n  selector: 'input[matStartDate]',\n  host: {\n    'class': 'mat-start-date mat-date-range-input-inner',\n    '[disabled]': 'disabled',\n    '(input)': '_onInput($event.target.value)',\n    '(change)': '_onChange()',\n    '(keydown)': '_onKeydown($event)',\n    '[attr.id]': '_rangeInput.id',\n    '[attr.aria-haspopup]': '_rangeInput.rangePicker ? \"dialog\" : null',\n    '[attr.aria-owns]': '(_rangeInput.rangePicker?.opened && _rangeInput.rangePicker.id) || null',\n    '[attr.min]': '_getMinDate() ? _dateAdapter.toIso8601(_getMinDate()) : null',\n    '[attr.max]': '_getMaxDate() ? _dateAdapter.toIso8601(_getMaxDate()) : null',\n    '(blur)': '_onBlur()',\n    'type': 'text',\n  },\n  providers: [\n    {provide: NG_VALUE_ACCESSOR, useExisting: MatStartDate, multi: true},\n    {provide: NG_VALIDATORS, useExisting: MatStartDate, multi: true}\n  ]\n})\nexport class MatStartDate<D> extends _MatDateRangeInputBase<D> implements CanUpdateErrorState {\n  /** Validator that checks that the start date isn't after the end date. */\n  private _startValidator: ValidatorFn = (control: AbstractControl): ValidationErrors | null => {\n    const start = this._dateAdapter.getValidDateOrNull(\n      this._dateAdapter.deserialize(control.value));\n    const end = this._model ? this._model.selection.end : null;\n    return (!start || !end ||\n        this._dateAdapter.compareDate(start, end) <= 0) ?\n        null : {'matStartDateInvalid': {'end': end, 'actual': start}};\n  }\n\n  constructor(\n    @Inject(MAT_DATE_RANGE_INPUT_PARENT) rangeInput: MatDateRangeInputParent<D>,\n    elementRef: ElementRef<HTMLInputElement>,\n    defaultErrorStateMatcher: ErrorStateMatcher,\n    injector: Injector,\n    @Optional() parentForm: NgForm,\n    @Optional() parentFormGroup: FormGroupDirective,\n    @Optional() dateAdapter: DateAdapter<D>,\n    @Optional() @Inject(MAT_DATE_FORMATS) dateFormats: MatDateFormats) {\n\n    // TODO(crisbeto): this constructor shouldn't be necessary, but ViewEngine doesn't seem to\n    // handle DI correctly when it is inherited from `MatDateRangeInputPartBase`. We can drop this\n    // constructor once ViewEngine is removed.\n    super(rangeInput, elementRef, defaultErrorStateMatcher, injector, parentForm, parentFormGroup,\n        dateAdapter, dateFormats);\n  }\n\n  protected _validator = Validators.compose([...super._getValidators(), this._startValidator]);\n\n  protected _getValueFromModel(modelValue: DateRange<D>) {\n    return modelValue.start;\n  }\n\n  protected _assignValueToModel(value: D | null) {\n    if (this._model) {\n      const range = new DateRange(value, this._model.selection.end);\n      this._model.updateSelection(range, this);\n      this._cvaOnChange(value);\n    }\n  }\n\n  protected _canEmitChangeEvent = (event: DateSelectionModelChange<DateRange<D>>): boolean => {\n    return event.source !== this._rangeInput._endInput;\n  }\n\n  protected _formatValue(value: D | null) {\n    super._formatValue(value);\n\n    // Any time the input value is reformatted we need to tell the parent.\n    this._rangeInput._handleChildValueChange();\n  }\n\n  /** Gets the value that should be used when mirroring the input's size. */\n  getMirrorValue(): string {\n    const element = this._elementRef.nativeElement;\n    const value = element.value;\n    return value.length > 0 ? value : element.placeholder;\n  }\n\n  static ngAcceptInputType_disabled: BooleanInput;\n}\n\n\n/** Input for entering the end date in a `mat-date-range-input`. */\n@Directive({\n  selector: 'input[matEndDate]',\n  host: {\n    'class': 'mat-end-date mat-date-range-input-inner',\n    '[disabled]': 'disabled',\n    '(input)': '_onInput($event.target.value)',\n    '(change)': '_onChange()',\n    '(keydown)': '_onKeydown($event)',\n    '[attr.aria-haspopup]': '_rangeInput.rangePicker ? \"dialog\" : null',\n    '[attr.aria-owns]': '(_rangeInput.rangePicker?.opened && _rangeInput.rangePicker.id) || null',\n    '[attr.min]': '_getMinDate() ? _dateAdapter.toIso8601(_getMinDate()) : null',\n    '[attr.max]': '_getMaxDate() ? _dateAdapter.toIso8601(_getMaxDate()) : null',\n    '(blur)': '_onBlur()',\n    'type': 'text',\n  },\n  providers: [\n    {provide: NG_VALUE_ACCESSOR, useExisting: MatEndDate, multi: true},\n    {provide: NG_VALIDATORS, useExisting: MatEndDate, multi: true}\n  ]\n})\nexport class MatEndDate<D> extends _MatDateRangeInputBase<D> implements CanUpdateErrorState {\n  /** Validator that checks that the end date isn't before the start date. */\n  private _endValidator: ValidatorFn = (control: AbstractControl): ValidationErrors | null => {\n    const end = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(control.value));\n    const start = this._model ? this._model.selection.start : null;\n    return (!end || !start ||\n        this._dateAdapter.compareDate(end, start) >= 0) ?\n        null : {'matEndDateInvalid': {'start': start, 'actual': end}};\n  }\n\n  constructor(\n    @Inject(MAT_DATE_RANGE_INPUT_PARENT) rangeInput: MatDateRangeInputParent<D>,\n    elementRef: ElementRef<HTMLInputElement>,\n    defaultErrorStateMatcher: ErrorStateMatcher,\n    injector: Injector,\n    @Optional() parentForm: NgForm,\n    @Optional() parentFormGroup: FormGroupDirective,\n    @Optional() dateAdapter: DateAdapter<D>,\n    @Optional() @Inject(MAT_DATE_FORMATS) dateFormats: MatDateFormats) {\n\n    // TODO(crisbeto): this constructor shouldn't be necessary, but ViewEngine doesn't seem to\n    // handle DI correctly when it is inherited from `MatDateRangeInputPartBase`. We can drop this\n    // constructor once ViewEngine is removed.\n    super(rangeInput, elementRef, defaultErrorStateMatcher, injector, parentForm, parentFormGroup,\n        dateAdapter, dateFormats);\n  }\n\n  protected _validator = Validators.compose([...super._getValidators(), this._endValidator]);\n\n  protected _getValueFromModel(modelValue: DateRange<D>) {\n    return modelValue.end;\n  }\n\n  protected _assignValueToModel(value: D | null) {\n    if (this._model) {\n      const range = new DateRange(this._model.selection.start, value);\n      this._model.updateSelection(range, this);\n      this._cvaOnChange(value);\n    }\n  }\n\n  protected _canEmitChangeEvent = (event: DateSelectionModelChange<DateRange<D>>): boolean => {\n    return event.source !== this._rangeInput._startInput;\n  }\n\n  _onKeydown(event: KeyboardEvent) {\n    // If the user is pressing backspace on an empty end input, move focus back to the start.\n    if (event.keyCode === BACKSPACE && !this._elementRef.nativeElement.value) {\n      this._rangeInput._startInput.focus();\n    }\n\n    super._onKeydown(event);\n  }\n\n  static ngAcceptInputType_disabled: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ChangeDetectionStrategy, Component, ViewEncapsulation} from '@angular/core';\nimport {MatDatepickerBase, MatDatepickerContent, MatDatepickerControl} from './datepicker-base';\nimport {MAT_RANGE_DATE_SELECTION_MODEL_PROVIDER, DateRange} from './date-selection-model';\nimport {MAT_CALENDAR_RANGE_STRATEGY_PROVIDER} from './date-range-selection-strategy';\n\n/**\n * Input that can be associated with a date range picker.\n * @docs-private\n */\nexport interface MatDateRangePickerInput<D> extends MatDatepickerControl<D> {\n  comparisonStart: D|null;\n  comparisonEnd: D|null;\n}\n\n// TODO(mmalerba): We use a component instead of a directive here so the user can use implicit\n// template reference variables (e.g. #d vs #d=\"matDateRangePicker\"). We can change this to a\n// directive if angular adds support for `exportAs: '$implicit'` on directives.\n/** Component responsible for managing the date range picker popup/dialog. */\n@Component({\n  selector: 'mat-date-range-picker',\n  template: '',\n  exportAs: 'matDateRangePicker',\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  encapsulation: ViewEncapsulation.None,\n  providers: [\n    MAT_RANGE_DATE_SELECTION_MODEL_PROVIDER,\n    MAT_CALENDAR_RANGE_STRATEGY_PROVIDER,\n  ]\n})\nexport class MatDateRangePicker<D> extends MatDatepickerBase<MatDateRangePickerInput<D>,\n  DateRange<D>, D> {\n  protected _forwardContentValues(instance: MatDatepickerContent<DateRange<D>, D>) {\n    super._forwardContentValues(instance);\n\n    const input = this._datepickerInput;\n\n    if (input) {\n      instance.comparisonStart = input.comparisonStart;\n      instance.comparisonEnd = input.comparisonEnd;\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  Component,\n  ChangeDetectionStrategy,\n  ViewEncapsulation,\n  Input,\n  Optional,\n  OnDestroy,\n  ContentChild,\n  AfterContentInit,\n  ChangeDetectorRef,\n  Self,\n  ElementRef,\n  Inject,\n  OnChanges,\n  SimpleChanges,\n} from '@angular/core';\nimport {MatFormFieldControl, MatFormField, MAT_FORM_FIELD} from '@angular/material/form-field';\nimport {ThemePalette, DateAdapter} from '@angular/material/core';\nimport {NgControl, ControlContainer} from '@angular/forms';\nimport {Subject, merge} from 'rxjs';\nimport {coerceBooleanProperty, BooleanInput} from '@angular/cdk/coercion';\nimport {\n  MatStartDate,\n  MatEndDate,\n  MatDateRangeInputParent,\n  MAT_DATE_RANGE_INPUT_PARENT,\n} from './date-range-input-parts';\nimport {MatDatepickerControl} from './datepicker-base';\nimport {createMissingDateImplError} from './datepicker-errors';\nimport {DateFilterFn, dateInputsHaveChanged} from './datepicker-input-base';\nimport {MatDateRangePicker, MatDateRangePickerInput} from './date-range-picker';\nimport {DateRange, MatDateSelectionModel} from './date-selection-model';\n\nlet nextUniqueId = 0;\n\n@Component({\n  selector: 'mat-date-range-input',\n  templateUrl: 'date-range-input.html',\n  styleUrls: ['date-range-input.css'],\n  exportAs: 'matDateRangeInput',\n  host: {\n    'class': 'mat-date-range-input',\n    '[class.mat-date-range-input-hide-placeholders]': '_shouldHidePlaceholders()',\n    '[class.mat-date-range-input-required]': 'required',\n    '[attr.id]': 'null',\n    'role': 'group',\n    '[attr.aria-labelledby]': '_getAriaLabelledby()',\n    '[attr.aria-describedby]': '_ariaDescribedBy',\n    // Used by the test harness to tie this input to its calendar. We can't depend on\n    // `aria-owns` for this, because it's only defined while the calendar is open.\n    '[attr.data-mat-calendar]': 'rangePicker ? rangePicker.id : null',\n  },\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  encapsulation: ViewEncapsulation.None,\n  providers: [\n    {provide: MatFormFieldControl, useExisting: MatDateRangeInput},\n    {provide: MAT_DATE_RANGE_INPUT_PARENT, useExisting: MatDateRangeInput},\n  ]\n})\nexport class MatDateRangeInput<D> implements MatFormFieldControl<DateRange<D>>,\n  MatDatepickerControl<D>, MatDateRangeInputParent<D>, MatDateRangePickerInput<D>,\n  AfterContentInit, OnChanges, OnDestroy {\n  /** Current value of the range input. */\n  get value() {\n    return this._model ? this._model.selection : null;\n  }\n\n  /** Unique ID for the input. */\n  id = `mat-date-range-input-${nextUniqueId++}`;\n\n  /** Whether the control is focused. */\n  focused = false;\n\n  /** Whether the control's label should float. */\n  get shouldLabelFloat(): boolean {\n    return this.focused || !this.empty;\n  }\n\n  /** Name of the form control. */\n  controlType = 'mat-date-range-input';\n\n  /**\n   * Implemented as a part of `MatFormFieldControl`.\n   * Set the placeholder attribute on `matStartDate` and `matEndDate`.\n   * @docs-private\n   */\n  get placeholder() {\n    const start = this._startInput?._getPlaceholder() || '';\n    const end = this._endInput?._getPlaceholder() || '';\n    return (start || end) ? `${start} ${this.separator} ${end}` : '';\n  }\n\n  /** The range picker that this input is associated with. */\n  @Input()\n  get rangePicker() { return this._rangePicker; }\n  set rangePicker(rangePicker: MatDateRangePicker<D>) {\n    if (rangePicker) {\n      this._model = rangePicker._registerInput(this);\n      this._rangePicker = rangePicker;\n      this._registerModel(this._model!);\n    }\n  }\n  private _rangePicker: MatDateRangePicker<D>;\n\n  /** Whether the input is required. */\n  @Input()\n  get required(): boolean { return !!this._required; }\n  set required(value: boolean) {\n    this._required = coerceBooleanProperty(value);\n  }\n  private _required: boolean;\n\n  /** Function that can be used to filter out dates within the date range picker. */\n  @Input()\n  get dateFilter() { return this._dateFilter; }\n  set dateFilter(value: DateFilterFn<D>) {\n    this._dateFilter = value;\n    this._revalidate();\n  }\n  private _dateFilter: DateFilterFn<D>;\n\n  /** The minimum valid date. */\n  @Input()\n  get min(): D | null { return this._min; }\n  set min(value: D | null) {\n    const validValue = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(value));\n\n    if (!this._dateAdapter.sameDate(validValue, this._min)) {\n      this._min = validValue;\n      this._revalidate();\n    }\n  }\n  private _min: D | null;\n\n  /** The maximum valid date. */\n  @Input()\n  get max(): D | null { return this._max; }\n  set max(value: D | null) {\n    const validValue = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(value));\n\n    if (!this._dateAdapter.sameDate(validValue, this._max)) {\n      this._max = validValue;\n      this._revalidate();\n    }\n  }\n  private _max: D | null;\n\n  /** Whether the input is disabled. */\n  @Input()\n  get disabled(): boolean {\n    return (this._startInput && this._endInput) ?\n      (this._startInput.disabled && this._endInput.disabled) :\n      this._groupDisabled;\n  }\n  set disabled(value: boolean) {\n    const newValue = coerceBooleanProperty(value);\n\n    if (newValue !== this._groupDisabled) {\n      this._groupDisabled = newValue;\n      this.stateChanges.next(undefined);\n    }\n  }\n  _groupDisabled = false;\n\n  /** Whether the input is in an error state. */\n  get errorState(): boolean {\n    if (this._startInput && this._endInput) {\n      return this._startInput.errorState || this._endInput.errorState;\n    }\n\n    return false;\n  }\n\n  /** Whether the datepicker input is empty. */\n  get empty(): boolean {\n    const startEmpty = this._startInput ? this._startInput.isEmpty() : false;\n    const endEmpty = this._endInput ? this._endInput.isEmpty() : false;\n    return startEmpty && endEmpty;\n  }\n\n  /** Value for the `aria-describedby` attribute of the inputs. */\n  _ariaDescribedBy: string | null = null;\n\n  /** Date selection model currently registered with the input. */\n  private _model: MatDateSelectionModel<DateRange<D>> | undefined;\n\n  /** Separator text to be shown between the inputs. */\n  @Input() separator = '–';\n\n  /** Start of the comparison range that should be shown in the calendar. */\n  @Input() comparisonStart: D | null = null;\n\n  /** End of the comparison range that should be shown in the calendar. */\n  @Input() comparisonEnd: D | null = null;\n\n  @ContentChild(MatStartDate) _startInput: MatStartDate<D>;\n  @ContentChild(MatEndDate) _endInput: MatEndDate<D>;\n\n  /**\n   * Implemented as a part of `MatFormFieldControl`.\n   * TODO(crisbeto): change type to `AbstractControlDirective` after #18206 lands.\n   * @docs-private\n   */\n  ngControl: NgControl | null;\n\n  /** Emits when the input's state has changed. */\n  stateChanges = new Subject<void>();\n\n  constructor(\n    private _changeDetectorRef: ChangeDetectorRef,\n    private _elementRef: ElementRef<HTMLElement>,\n    @Optional() @Self() control: ControlContainer,\n    @Optional() private _dateAdapter: DateAdapter<D>,\n    @Optional() @Inject(MAT_FORM_FIELD) private _formField?: MatFormField) {\n\n    if (!_dateAdapter && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw createMissingDateImplError('DateAdapter');\n    }\n\n    // TODO(crisbeto): remove `as any` after #18206 lands.\n    this.ngControl = control as any;\n  }\n\n  /**\n   * Implemented as a part of `MatFormFieldControl`.\n   * @docs-private\n   */\n  setDescribedByIds(ids: string[]): void {\n    this._ariaDescribedBy = ids.length ? ids.join(' ') : null;\n  }\n\n  /**\n   * Implemented as a part of `MatFormFieldControl`.\n   * @docs-private\n   */\n  onContainerClick(): void {\n    if (!this.focused && !this.disabled) {\n      if (!this._model || !this._model.selection.start) {\n        this._startInput.focus();\n      } else {\n        this._endInput.focus();\n      }\n    }\n  }\n\n  ngAfterContentInit() {\n    if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      if (!this._startInput) {\n        throw Error('mat-date-range-input must contain a matStartDate input');\n      }\n\n      if (!this._endInput) {\n        throw Error('mat-date-range-input must contain a matEndDate input');\n      }\n    }\n\n    if (this._model) {\n      this._registerModel(this._model);\n    }\n\n    // We don't need to unsubscribe from this, because we\n    // know that the input streams will be completed on destroy.\n    merge(this._startInput.stateChanges, this._endInput.stateChanges).subscribe(() => {\n      this.stateChanges.next(undefined);\n    });\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    if (dateInputsHaveChanged(changes, this._dateAdapter)) {\n      this.stateChanges.next(undefined);\n    }\n  }\n\n  ngOnDestroy() {\n    this.stateChanges.complete();\n  }\n\n  /** Gets the date at which the calendar should start. */\n  getStartValue(): D | null {\n    return this.value ? this.value.start : null;\n  }\n\n  /** Gets the input's theme palette. */\n  getThemePalette(): ThemePalette {\n    return this._formField ? this._formField.color : undefined;\n  }\n\n  /** Gets the element to which the calendar overlay should be attached. */\n  getConnectedOverlayOrigin(): ElementRef {\n    return this._formField ? this._formField.getConnectedOverlayOrigin() : this._elementRef;\n  }\n\n  /** Gets the value that is used to mirror the state input. */\n  _getInputMirrorValue() {\n    return this._startInput ? this._startInput.getMirrorValue() : '';\n  }\n\n  /** Whether the input placeholders should be hidden. */\n  _shouldHidePlaceholders() {\n    return this._startInput ? !this._startInput.isEmpty() : false;\n  }\n\n  /** Handles the value in one of the child inputs changing. */\n  _handleChildValueChange() {\n    this.stateChanges.next(undefined);\n    this._changeDetectorRef.markForCheck();\n  }\n\n  /** Opens the date range picker associated with the input. */\n  _openDatepicker() {\n    if (this._rangePicker) {\n      this._rangePicker.open();\n    }\n  }\n\n  /** Whether the separate text should be hidden. */\n  _shouldHideSeparator() {\n    return (!this._formField || this._formField._hideControlPlaceholder()) && this.empty;\n  }\n\n  /** Gets the value for the `aria-labelledby` attribute of the inputs. */\n  _getAriaLabelledby() {\n    const formField = this._formField;\n    return formField && formField._hasFloatingLabel() ? formField._labelId : null;\n  }\n\n  /** Re-runs the validators on the start/end inputs. */\n  private _revalidate() {\n    if (this._startInput) {\n      this._startInput._validatorOnChange();\n    }\n\n    if (this._endInput) {\n      this._endInput._validatorOnChange();\n    }\n  }\n\n  /** Registers the current date selection model with the start/end inputs. */\n  private _registerModel(model: MatDateSelectionModel<DateRange<D>>) {\n    if (this._startInput) {\n      this._startInput._registerModel(model);\n    }\n\n    if (this._endInput) {\n      this._endInput._registerModel(model);\n    }\n  }\n\n  static ngAcceptInputType_required: BooleanInput;\n  static ngAcceptInputType_disabled: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {A11yModule} from '@angular/cdk/a11y';\nimport {OverlayModule} from '@angular/cdk/overlay';\nimport {PortalModule} from '@angular/cdk/portal';\nimport {CommonModule} from '@angular/common';\nimport {NgModule} from '@angular/core';\nimport {MatButtonModule} from '@angular/material/button';\nimport {MatDialogModule} from '@angular/material/dialog';\nimport {CdkScrollableModule} from '@angular/cdk/scrolling';\nimport {MatCalendar, MatCalendarHeader} from './calendar';\nimport {MatCalendarBody} from './calendar-body';\nimport {MatDatepicker} from './datepicker';\nimport {\n  MatDatepickerContent,\n  MAT_DATEPICKER_SCROLL_STRATEGY_FACTORY_PROVIDER,\n} from './datepicker-base';\nimport {MatDatepickerInput} from './datepicker-input';\nimport {MatDatepickerIntl} from './datepicker-intl';\nimport {MatDatepickerToggle, MatDatepickerToggleIcon} from './datepicker-toggle';\nimport {MatMonthView} from './month-view';\nimport {MatMultiYearView} from './multi-year-view';\nimport {MatYearView} from './year-view';\nimport {MatDateRangeInput} from './date-range-input';\nimport {MatStartDate, MatEndDate} from './date-range-input-parts';\nimport {MatDateRangePicker} from './date-range-picker';\n\n\n@NgModule({\n  imports: [\n    CommonModule,\n    MatButtonModule,\n    MatDialogModule,\n    OverlayModule,\n    A11yModule,\n    PortalModule,\n  ],\n  exports: [\n    CdkScrollableModule,\n    MatCalendar,\n    MatCalendarBody,\n    MatDatepicker,\n    MatDatepickerContent,\n    MatDatepickerInput,\n    MatDatepickerToggle,\n    MatDatepickerToggleIcon,\n    MatMonthView,\n    MatYearView,\n    MatMultiYearView,\n    MatCalendarHeader,\n    MatDateRangeInput,\n    MatStartDate,\n    MatEndDate,\n    MatDateRangePicker,\n  ],\n  declarations: [\n    MatCalendar,\n    MatCalendarBody,\n    MatDatepicker,\n    MatDatepickerContent,\n    MatDatepickerInput,\n    MatDatepickerToggle,\n    MatDatepickerToggleIcon,\n    MatMonthView,\n    MatYearView,\n    MatMultiYearView,\n    MatCalendarHeader,\n    MatDateRangeInput,\n    MatStartDate,\n    MatEndDate,\n    MatDateRangePicker,\n  ],\n  providers: [\n    MatDatepickerIntl,\n    MAT_DATEPICKER_SCROLL_STRATEGY_FACTORY_PROVIDER\n  ],\n  entryComponents: [\n    MatDatepickerContent,\n    MatCalendarHeader,\n  ]\n})\nexport class MatDatepickerModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './datepicker-module';\nexport * from './calendar';\nexport * from './calendar-body';\nexport * from './datepicker';\nexport {\n  MAT_DATE_RANGE_SELECTION_STRATEGY,\n  MatDateRangeSelectionStrategy,\n  DefaultMatCalendarRangeStrategy,\n} from './date-range-selection-strategy';\nexport * from './datepicker-animations';\nexport {\n  MAT_DATEPICKER_SCROLL_STRATEGY,\n  MAT_DATEPICKER_SCROLL_STRATEGY_FACTORY,\n  MAT_DATEPICKER_SCROLL_STRATEGY_FACTORY_PROVIDER,\n  MatDatepickerContent,\n  DatepickerDropdownPositionX,\n  DatepickerDropdownPositionY,\n} from './datepicker-base';\nexport {MatDatepickerInputEvent, DateFilterFn} from './datepicker-input-base';\nexport {\n  MAT_DATEPICKER_VALUE_ACCESSOR,\n  MAT_DATEPICKER_VALIDATORS,\n  MatDatepickerInput,\n} from './datepicker-input';\nexport * from './datepicker-intl';\nexport * from './datepicker-toggle';\nexport * from './month-view';\nexport * from './year-view';\nexport * from './date-range-input';\nexport {MatDateRangePicker} from './date-range-picker';\nexport * from './date-selection-model';\nexport {MatStartDate, MatEndDate} from './date-range-input-parts';\nexport {MatMultiYearView, yearsPerPage, yearsPerRow} from './multi-year-view';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n\nexport {MAT_DATE_RANGE_INPUT_PARENT as ɵangular_material_src_material_datepicker_datepicker_e} from './date-range-input-parts';\nexport {MAT_CALENDAR_RANGE_STRATEGY_PROVIDER as ɵangular_material_src_material_datepicker_datepicker_b,MAT_CALENDAR_RANGE_STRATEGY_PROVIDER_FACTORY as ɵangular_material_src_material_datepicker_datepicker_a} from './date-range-selection-strategy';\nexport {MatDatepickerBase as ɵangular_material_src_material_datepicker_datepicker_c} from './datepicker-base';\nexport {MatDatepickerInputBase as ɵangular_material_src_material_datepicker_datepicker_d} from './datepicker-input-base';","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Platform, normalizePassiveListenerOptions} from '@angular/cdk/platform';\nimport {\n  Directive,\n  ElementRef,\n  EventEmitter,\n  Injectable,\n  NgZone,\n  OnDestroy,\n  OnInit,\n  Output,\n} from '@angular/core';\nimport {coerceElement} from '@angular/cdk/coercion';\nimport {EMPTY, Observable, Subject} from 'rxjs';\n\n\n/** An event that is emitted when the autofill state of an input changes. */\nexport type AutofillEvent = {\n  /** The element whose autofill state changes. */\n  target: Element;\n  /** Whether the element is currently autofilled. */\n  isAutofilled: boolean;\n};\n\n\n/** Used to track info about currently monitored elements. */\ntype MonitoredElementInfo = {\n  subject: Subject<AutofillEvent>;\n  unlisten: () => void;\n};\n\n\n/** Options to pass to the animationstart listener. */\nconst listenerOptions = normalizePassiveListenerOptions({passive: true});\n\n\n/**\n * An injectable service that can be used to monitor the autofill state of an input.\n * Based on the following blog post:\n * https://medium.com/@brunn/detecting-autofilled-fields-in-javascript-aed598d25da7\n */\n@Injectable({providedIn: 'root'})\nexport class AutofillMonitor implements OnDestroy {\n  private _monitoredElements = new Map<Element, MonitoredElementInfo>();\n\n  constructor(private _platform: Platform, private _ngZone: NgZone) {}\n\n  /**\n   * Monitor for changes in the autofill state of the given input element.\n   * @param element The element to monitor.\n   * @return A stream of autofill state changes.\n   */\n  monitor(element: Element): Observable<AutofillEvent>;\n\n  /**\n   * Monitor for changes in the autofill state of the given input element.\n   * @param element The element to monitor.\n   * @return A stream of autofill state changes.\n   */\n  monitor(element: ElementRef<Element>): Observable<AutofillEvent>;\n\n  monitor(elementOrRef: Element | ElementRef<Element>): Observable<AutofillEvent> {\n    if (!this._platform.isBrowser) {\n      return EMPTY;\n    }\n\n    const element = coerceElement(elementOrRef);\n    const info = this._monitoredElements.get(element);\n\n    if (info) {\n      return info.subject;\n    }\n\n    const result = new Subject<AutofillEvent>();\n    const cssClass = 'cdk-text-field-autofilled';\n    const listener = ((event: AnimationEvent) => {\n      // Animation events fire on initial element render, we check for the presence of the autofill\n      // CSS class to make sure this is a real change in state, not just the initial render before\n      // we fire off events.\n      if (event.animationName === 'cdk-text-field-autofill-start' &&\n          !element.classList.contains(cssClass)) {\n        element.classList.add(cssClass);\n        this._ngZone.run(() => result.next({target: event.target as Element, isAutofilled: true}));\n      } else if (event.animationName === 'cdk-text-field-autofill-end' &&\n          element.classList.contains(cssClass)) {\n        element.classList.remove(cssClass);\n        this._ngZone.run(() => result.next({target: event.target as Element, isAutofilled: false}));\n      }\n    }) as EventListenerOrEventListenerObject;\n\n    this._ngZone.runOutsideAngular(() => {\n      element.addEventListener('animationstart', listener, listenerOptions);\n      element.classList.add('cdk-text-field-autofill-monitored');\n    });\n\n    this._monitoredElements.set(element, {\n      subject: result,\n      unlisten: () => {\n        element.removeEventListener('animationstart', listener, listenerOptions);\n      }\n    });\n\n    return result;\n  }\n\n  /**\n   * Stop monitoring the autofill state of the given input element.\n   * @param element The element to stop monitoring.\n   */\n  stopMonitoring(element: Element): void;\n\n  /**\n   * Stop monitoring the autofill state of the given input element.\n   * @param element The element to stop monitoring.\n   */\n  stopMonitoring(element: ElementRef<Element>): void;\n\n  stopMonitoring(elementOrRef: Element | ElementRef<Element>): void {\n    const element = coerceElement(elementOrRef);\n    const info = this._monitoredElements.get(element);\n\n    if (info) {\n      info.unlisten();\n      info.subject.complete();\n      element.classList.remove('cdk-text-field-autofill-monitored');\n      element.classList.remove('cdk-text-field-autofilled');\n      this._monitoredElements.delete(element);\n    }\n  }\n\n  ngOnDestroy() {\n    this._monitoredElements.forEach((_info, element) => this.stopMonitoring(element));\n  }\n}\n\n\n/** A directive that can be used to monitor the autofill state of an input. */\n@Directive({\n  selector: '[cdkAutofill]',\n})\nexport class CdkAutofill implements OnDestroy, OnInit {\n  /** Emits when the autofill state of the element changes. */\n  @Output() cdkAutofill: EventEmitter<AutofillEvent> = new EventEmitter<AutofillEvent>();\n\n  constructor(private _elementRef: ElementRef<HTMLElement>,\n              private _autofillMonitor: AutofillMonitor) {}\n\n  ngOnInit() {\n    this._autofillMonitor\n      .monitor(this._elementRef)\n      .subscribe(event => this.cdkAutofill.emit(event));\n  }\n\n  ngOnDestroy() {\n    this._autofillMonitor.stopMonitoring(this._elementRef);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  BooleanInput,\n  coerceBooleanProperty,\n  coerceNumberProperty,\n  NumberInput\n} from '@angular/cdk/coercion';\nimport {\n  Directive,\n  ElementRef,\n  Input,\n  AfterViewInit,\n  DoCheck,\n  OnDestroy,\n  NgZone,\n  HostListener,\n  Optional,\n  Inject,\n} from '@angular/core';\nimport {Platform} from '@angular/cdk/platform';\nimport {auditTime, takeUntil} from 'rxjs/operators';\nimport {fromEvent, Subject} from 'rxjs';\nimport {DOCUMENT} from '@angular/common';\n\n/** Directive to automatically resize a textarea to fit its content. */\n@Directive({\n  selector: 'textarea[cdkTextareaAutosize]',\n  exportAs: 'cdkTextareaAutosize',\n  host: {\n    'class': 'cdk-textarea-autosize',\n    // Textarea elements that have the directive applied should have a single row by default.\n    // Browsers normally show two rows by default and therefore this limits the minRows binding.\n    'rows': '1',\n  },\n})\nexport class CdkTextareaAutosize implements AfterViewInit, DoCheck, OnDestroy {\n  /** Keep track of the previous textarea value to avoid resizing when the value hasn't changed. */\n  private _previousValue?: string;\n  private _initialHeight: string | undefined;\n  private readonly _destroyed = new Subject<void>();\n\n  private _minRows: number;\n  private _maxRows: number;\n  private _enabled: boolean = true;\n\n  /**\n   * Value of minRows as of last resize. If the minRows has decreased, the\n   * height of the textarea needs to be recomputed to reflect the new minimum. The maxHeight\n   * does not have the same problem because it does not affect the textarea's scrollHeight.\n   */\n  private _previousMinRows: number = -1;\n\n  private _textareaElement: HTMLTextAreaElement;\n\n  /** Minimum amount of rows in the textarea. */\n  @Input('cdkAutosizeMinRows')\n  get minRows(): number { return this._minRows; }\n  set minRows(value: number) {\n    this._minRows = coerceNumberProperty(value);\n    this._setMinHeight();\n  }\n\n  /** Maximum amount of rows in the textarea. */\n  @Input('cdkAutosizeMaxRows')\n  get maxRows(): number { return this._maxRows; }\n  set maxRows(value: number) {\n    this._maxRows = coerceNumberProperty(value);\n    this._setMaxHeight();\n  }\n\n  /** Whether autosizing is enabled or not */\n  @Input('cdkTextareaAutosize')\n  get enabled(): boolean { return this._enabled; }\n  set enabled(value: boolean) {\n    value = coerceBooleanProperty(value);\n\n    // Only act if the actual value changed. This specifically helps to not run\n    // resizeToFitContent too early (i.e. before ngAfterViewInit)\n    if (this._enabled !== value) {\n      (this._enabled = value) ? this.resizeToFitContent(true) : this.reset();\n    }\n  }\n\n  /** Cached height of a textarea with a single row. */\n  private _cachedLineHeight: number;\n\n  /** Used to reference correct document/window */\n  protected _document?: Document;\n\n  /** Class that should be applied to the textarea while it's being measured. */\n  private _measuringClass: string;\n\n  constructor(private _elementRef: ElementRef<HTMLElement>,\n              private _platform: Platform,\n              private _ngZone: NgZone,\n              /** @breaking-change 11.0.0 make document required */\n              @Optional() @Inject(DOCUMENT) document?: any) {\n    this._document = document;\n\n    this._textareaElement = this._elementRef.nativeElement as HTMLTextAreaElement;\n    this._measuringClass = _platform.FIREFOX ?\n      'cdk-textarea-autosize-measuring-firefox' :\n      'cdk-textarea-autosize-measuring';\n  }\n\n  /** Sets the minimum height of the textarea as determined by minRows. */\n  _setMinHeight(): void {\n    const minHeight = this.minRows && this._cachedLineHeight ?\n        `${this.minRows * this._cachedLineHeight}px` : null;\n\n    if (minHeight)  {\n      this._textareaElement.style.minHeight = minHeight;\n    }\n  }\n\n  /** Sets the maximum height of the textarea as determined by maxRows. */\n  _setMaxHeight(): void {\n    const maxHeight = this.maxRows && this._cachedLineHeight ?\n        `${this.maxRows * this._cachedLineHeight}px` : null;\n\n    if (maxHeight) {\n      this._textareaElement.style.maxHeight = maxHeight;\n    }\n  }\n\n  ngAfterViewInit() {\n    if (this._platform.isBrowser) {\n      // Remember the height which we started with in case autosizing is disabled\n      this._initialHeight = this._textareaElement.style.height;\n\n      this.resizeToFitContent();\n\n      this._ngZone.runOutsideAngular(() => {\n        const window = this._getWindow();\n\n        fromEvent(window, 'resize')\n          .pipe(auditTime(16), takeUntil(this._destroyed))\n          .subscribe(() => this.resizeToFitContent(true));\n      });\n    }\n  }\n\n  ngOnDestroy() {\n    this._destroyed.next();\n    this._destroyed.complete();\n  }\n\n  /**\n   * Cache the height of a single-row textarea if it has not already been cached.\n   *\n   * We need to know how large a single \"row\" of a textarea is in order to apply minRows and\n   * maxRows. For the initial version, we will assume that the height of a single line in the\n   * textarea does not ever change.\n   */\n  private _cacheTextareaLineHeight(): void {\n    if (this._cachedLineHeight) {\n      return;\n    }\n\n    // Use a clone element because we have to override some styles.\n    let textareaClone = this._textareaElement.cloneNode(false) as HTMLTextAreaElement;\n    textareaClone.rows = 1;\n\n    // Use `position: absolute` so that this doesn't cause a browser layout and use\n    // `visibility: hidden` so that nothing is rendered. Clear any other styles that\n    // would affect the height.\n    textareaClone.style.position = 'absolute';\n    textareaClone.style.visibility = 'hidden';\n    textareaClone.style.border = 'none';\n    textareaClone.style.padding = '0';\n    textareaClone.style.height = '';\n    textareaClone.style.minHeight = '';\n    textareaClone.style.maxHeight = '';\n\n    // In Firefox it happens that textarea elements are always bigger than the specified amount\n    // of rows. This is because Firefox tries to add extra space for the horizontal scrollbar.\n    // As a workaround that removes the extra space for the scrollbar, we can just set overflow\n    // to hidden. This ensures that there is no invalid calculation of the line height.\n    // See Firefox bug report: https://bugzilla.mozilla.org/show_bug.cgi?id=33654\n    textareaClone.style.overflow = 'hidden';\n\n    this._textareaElement.parentNode!.appendChild(textareaClone);\n    this._cachedLineHeight = textareaClone.clientHeight;\n    this._textareaElement.parentNode!.removeChild(textareaClone);\n\n    // Min and max heights have to be re-calculated if the cached line height changes\n    this._setMinHeight();\n    this._setMaxHeight();\n  }\n\n  ngDoCheck() {\n    if (this._platform.isBrowser) {\n      this.resizeToFitContent();\n    }\n  }\n\n  /**\n   * Resize the textarea to fit its content.\n   * @param force Whether to force a height recalculation. By default the height will be\n   *    recalculated only if the value changed since the last call.\n   */\n  resizeToFitContent(force: boolean = false) {\n    // If autosizing is disabled, just skip everything else\n    if (!this._enabled) {\n      return;\n    }\n\n    this._cacheTextareaLineHeight();\n\n    // If we haven't determined the line-height yet, we know we're still hidden and there's no point\n    // in checking the height of the textarea.\n    if (!this._cachedLineHeight) {\n      return;\n    }\n\n    const textarea = this._elementRef.nativeElement as HTMLTextAreaElement;\n    const value = textarea.value;\n\n    // Only resize if the value or minRows have changed since these calculations can be expensive.\n    if (!force && this._minRows === this._previousMinRows && value === this._previousValue) {\n      return;\n    }\n\n    const placeholderText = textarea.placeholder;\n\n    // Reset the textarea height to auto in order to shrink back to its default size.\n    // Also temporarily force overflow:hidden, so scroll bars do not interfere with calculations.\n    // Long placeholders that are wider than the textarea width may lead to a bigger scrollHeight\n    // value. To ensure that the scrollHeight is not bigger than the content, the placeholders\n    // need to be removed temporarily.\n    textarea.classList.add(this._measuringClass);\n    textarea.placeholder = '';\n\n    // The measuring class includes a 2px padding to workaround an issue with Chrome,\n    // so we account for that extra space here by subtracting 4 (2px top + 2px bottom).\n    const height = textarea.scrollHeight - 4;\n\n    // Use the scrollHeight to know how large the textarea *would* be if fit its entire value.\n    textarea.style.height = `${height}px`;\n    textarea.classList.remove(this._measuringClass);\n    textarea.placeholder = placeholderText;\n\n    this._ngZone.runOutsideAngular(() => {\n      if (typeof requestAnimationFrame !== 'undefined') {\n        requestAnimationFrame(() => this._scrollToCaretPosition(textarea));\n      } else {\n        setTimeout(() => this._scrollToCaretPosition(textarea));\n      }\n    });\n\n    this._previousValue = value;\n    this._previousMinRows = this._minRows;\n  }\n\n  /**\n   * Resets the textarea to its original size\n   */\n  reset() {\n    // Do not try to change the textarea, if the initialHeight has not been determined yet\n    // This might potentially remove styles when reset() is called before ngAfterViewInit\n    if (this._initialHeight !== undefined) {\n      this._textareaElement.style.height = this._initialHeight;\n    }\n  }\n\n  // In Ivy the `host` metadata will be merged, whereas in ViewEngine it is overridden. In order\n  // to avoid double event listeners, we need to use `HostListener`. Once Ivy is the default, we\n  // can move this back into `host`.\n  // tslint:disable:no-host-decorator-in-concrete\n  @HostListener('input')\n  _noopInputHandler() {\n    // no-op handler that ensures we're running change detection on input events.\n  }\n\n  /** Access injected document if available or fallback to global document reference */\n  private _getDocument(): Document {\n    return this._document || document;\n  }\n\n  /** Use defaultView of injected document if available or fallback to global window reference */\n  private _getWindow(): Window {\n    const doc = this._getDocument();\n    return doc.defaultView || window;\n  }\n\n  /**\n   * Scrolls a textarea to the caret position. On Firefox resizing the textarea will\n   * prevent it from scrolling to the caret position. We need to re-set the selection\n   * in order for it to scroll to the proper position.\n   */\n  private _scrollToCaretPosition(textarea: HTMLTextAreaElement) {\n    const {selectionStart, selectionEnd} = textarea;\n    const document = this._getDocument();\n\n    // IE will throw an \"Unspecified error\" if we try to set the selection range after the\n    // element has been removed from the DOM. Assert that the directive hasn't been destroyed\n    // between the time we requested the animation frame and when it was executed.\n    // Also note that we have to assert that the textarea is focused before we set the\n    // selection range. Setting the selection range on a non-focused textarea will cause\n    // it to receive focus on IE and Edge.\n    if (!this._destroyed.isStopped && document.activeElement === textarea) {\n      textarea.setSelectionRange(selectionStart, selectionEnd);\n    }\n  }\n\n  static ngAcceptInputType_minRows: NumberInput;\n  static ngAcceptInputType_maxRows: NumberInput;\n  static ngAcceptInputType_enabled: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {PlatformModule} from '@angular/cdk/platform';\nimport {NgModule} from '@angular/core';\nimport {CdkAutofill} from './autofill';\nimport {CdkTextareaAutosize} from './autosize';\n\n\n@NgModule({\n  declarations: [CdkAutofill, CdkTextareaAutosize],\n  imports: [PlatformModule],\n  exports: [CdkAutofill, CdkTextareaAutosize],\n})\nexport class TextFieldModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './autofill';\nexport * from './autosize';\nexport * from './text-field-module';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Buffers the source Observable values until the size hits the maximum\n * `bufferSize` given.\n *\n * <span class=\"informal\">Collects values from the past as an array, and emits\n * that array only when its size reaches `bufferSize`.</span>\n *\n * <img src=\"./img/bufferCount.png\" width=\"100%\">\n *\n * Buffers a number of values from the source Observable by `bufferSize` then\n * emits the buffer and clears it, and starts a new buffer each\n * `startBufferEvery` values. If `startBufferEvery` is not provided or is\n * `null`, then new buffers are started immediately at the start of the source\n * and when each buffer closes and is emitted.\n *\n * @example <caption>Emit the last two click events as an array</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var buffered = clicks.bufferCount(2);\n * buffered.subscribe(x => console.log(x));\n *\n * @example <caption>On every click, emit the last two click events as an array</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var buffered = clicks.bufferCount(2, 1);\n * buffered.subscribe(x => console.log(x));\n *\n * @see {@link buffer}\n * @see {@link bufferTime}\n * @see {@link bufferToggle}\n * @see {@link bufferWhen}\n * @see {@link pairwise}\n * @see {@link windowCount}\n *\n * @param {number} bufferSize The maximum size of the buffer emitted.\n * @param {number} [startBufferEvery] Interval at which to start a new buffer.\n * For example if `startBufferEvery` is `2`, then a new buffer will be started\n * on every other value from the source. A new buffer is started at the\n * beginning of the source by default.\n * @return {Observable<T[]>} An Observable of arrays of buffered values.\n * @method bufferCount\n * @owner Observable\n */\nfunction bufferCount(bufferSize, startBufferEvery) {\n    if (startBufferEvery === void 0) { startBufferEvery = null; }\n    return operators_1.bufferCount(bufferSize, startBufferEvery)(this);\n}\nexports.bufferCount = bufferCount;\n//# sourceMappingURL=bufferCount.js.map","import { isScheduler } from '../util/isScheduler';\nimport { isArray } from '../util/isArray';\nimport { OuterSubscriber } from '../OuterSubscriber';\nimport { subscribeToResult } from '../util/subscribeToResult';\nimport { fromArray } from './fromArray';\nconst NONE = {};\nexport function combineLatest(...observables) {\n    let resultSelector = undefined;\n    let scheduler = undefined;\n    if (isScheduler(observables[observables.length - 1])) {\n        scheduler = observables.pop();\n    }\n    if (typeof observables[observables.length - 1] === 'function') {\n        resultSelector = observables.pop();\n    }\n    if (observables.length === 1 && isArray(observables[0])) {\n        observables = observables[0];\n    }\n    return fromArray(observables, scheduler).lift(new CombineLatestOperator(resultSelector));\n}\nexport class CombineLatestOperator {\n    constructor(resultSelector) {\n        this.resultSelector = resultSelector;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new CombineLatestSubscriber(subscriber, this.resultSelector));\n    }\n}\nexport class CombineLatestSubscriber extends OuterSubscriber {\n    constructor(destination, resultSelector) {\n        super(destination);\n        this.resultSelector = resultSelector;\n        this.active = 0;\n        this.values = [];\n        this.observables = [];\n    }\n    _next(observable) {\n        this.values.push(NONE);\n        this.observables.push(observable);\n    }\n    _complete() {\n        const observables = this.observables;\n        const len = observables.length;\n        if (len === 0) {\n            this.destination.complete();\n        }\n        else {\n            this.active = len;\n            this.toRespond = len;\n            for (let i = 0; i < len; i++) {\n                const observable = observables[i];\n                this.add(subscribeToResult(this, observable, undefined, i));\n            }\n        }\n    }\n    notifyComplete(unused) {\n        if ((this.active -= 1) === 0) {\n            this.destination.complete();\n        }\n    }\n    notifyNext(_outerValue, innerValue, outerIndex) {\n        const values = this.values;\n        const oldVal = values[outerIndex];\n        const toRespond = !this.toRespond\n            ? 0\n            : oldVal === NONE ? --this.toRespond : this.toRespond;\n        values[outerIndex] = innerValue;\n        if (toRespond === 0) {\n            if (this.resultSelector) {\n                this._tryResultSelector(values);\n            }\n            else {\n                this.destination.next(values.slice());\n            }\n        }\n    }\n    _tryResultSelector(values) {\n        let result;\n        try {\n            result = this.resultSelector.apply(this, values);\n        }\n        catch (err) {\n            this.destination.error(err);\n            return;\n        }\n        this.destination.next(result);\n    }\n}\n//# sourceMappingURL=combineLatest.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar internal_compatibility_1 = require(\"rxjs/internal-compatibility\");\nvar operators_1 = require(\"rxjs/operators\");\nfunction windowTime(windowTimeSpan) {\n    var scheduler = rxjs_1.asyncScheduler;\n    var windowCreationInterval = null;\n    var maxWindowSize = Number.POSITIVE_INFINITY;\n    if (internal_compatibility_1.isScheduler(arguments[3])) {\n        scheduler = arguments[3];\n    }\n    if (internal_compatibility_1.isScheduler(arguments[2])) {\n        scheduler = arguments[2];\n    }\n    else if (internal_compatibility_1.isNumeric(arguments[2])) {\n        maxWindowSize = Number(arguments[2]);\n    }\n    if (internal_compatibility_1.isScheduler(arguments[1])) {\n        scheduler = arguments[1];\n    }\n    else if (internal_compatibility_1.isNumeric(arguments[1])) {\n        windowCreationInterval = Number(arguments[1]);\n    }\n    return operators_1.windowTime(windowTimeSpan, windowCreationInterval, maxWindowSize, scheduler)(this);\n}\nexports.windowTime = windowTime;\n//# sourceMappingURL=windowTime.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar exhaust_1 = require(\"../../operator/exhaust\");\nrxjs_1.Observable.prototype.exhaust = exhaust_1.exhaust;\n//# sourceMappingURL=exhaust.js.map","import { Observable } from '../Observable';\nimport { Subscription } from '../Subscription';\nexport function scheduleArray(input, scheduler) {\n    return new Observable(subscriber => {\n        const sub = new Subscription();\n        let i = 0;\n        sub.add(scheduler.schedule(function () {\n            if (i === input.length) {\n                subscriber.complete();\n                return;\n            }\n            subscriber.next(input[i++]);\n            if (!subscriber.closed) {\n                sub.add(this.schedule());\n            }\n        }));\n        return sub;\n    });\n}\n//# sourceMappingURL=scheduleArray.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {FocusMonitor} from '@angular/cdk/a11y';\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {SelectionModel} from '@angular/cdk/collections';\nimport {\n  AfterContentInit,\n  Attribute,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ContentChildren,\n  Directive,\n  ElementRef,\n  EventEmitter,\n  forwardRef,\n  Input,\n  OnDestroy,\n  OnInit,\n  Optional,\n  Output,\n  QueryList,\n  ViewChild,\n  ViewEncapsulation,\n  InjectionToken,\n  Inject,\n  AfterViewInit,\n} from '@angular/core';\nimport {ControlValueAccessor, NG_VALUE_ACCESSOR} from '@angular/forms';\nimport {\n  CanDisableRipple,\n  mixinDisableRipple,\n  CanDisableRippleCtor,\n} from '@angular/material/core';\n\n\n/**\n * @deprecated No longer used.\n * @breaking-change 11.0.0\n */\nexport type ToggleType = 'checkbox' | 'radio';\n\n/** Possible appearance styles for the button toggle. */\nexport type MatButtonToggleAppearance = 'legacy' | 'standard';\n\n/**\n * Represents the default options for the button toggle that can be configured\n * using the `MAT_BUTTON_TOGGLE_DEFAULT_OPTIONS` injection token.\n */\nexport interface MatButtonToggleDefaultOptions {\n  appearance?: MatButtonToggleAppearance;\n}\n\n/**\n * Injection token that can be used to configure the\n * default options for all button toggles within an app.\n */\nexport const MAT_BUTTON_TOGGLE_DEFAULT_OPTIONS =\n    new InjectionToken<MatButtonToggleDefaultOptions>('MAT_BUTTON_TOGGLE_DEFAULT_OPTIONS');\n\n/**\n * Injection token that can be used to reference instances of `MatButtonToggleGroup`.\n * It serves as alternative token to the actual `MatButtonToggleGroup` class which\n * could cause unnecessary retention of the class and its component metadata.\n */\nexport const MAT_BUTTON_TOGGLE_GROUP =\n    new InjectionToken<MatButtonToggleGroup>('MatButtonToggleGroup');\n\n/**\n * Provider Expression that allows mat-button-toggle-group to register as a ControlValueAccessor.\n * This allows it to support [(ngModel)].\n * @docs-private\n */\nexport const MAT_BUTTON_TOGGLE_GROUP_VALUE_ACCESSOR: any = {\n  provide: NG_VALUE_ACCESSOR,\n  useExisting: forwardRef(() => MatButtonToggleGroup),\n  multi: true\n};\n\nlet _uniqueIdCounter = 0;\n\n/** Change event object emitted by MatButtonToggle. */\nexport class MatButtonToggleChange {\n  constructor(\n    /** The MatButtonToggle that emits the event. */\n    public source: MatButtonToggle,\n\n    /** The value assigned to the MatButtonToggle. */\n    public value: any) {}\n}\n\n/** Exclusive selection button toggle group that behaves like a radio-button group. */\n@Directive({\n  selector: 'mat-button-toggle-group',\n  providers: [\n    MAT_BUTTON_TOGGLE_GROUP_VALUE_ACCESSOR,\n    {provide: MAT_BUTTON_TOGGLE_GROUP, useExisting: MatButtonToggleGroup},\n  ],\n  host: {\n    'role': 'group',\n    'class': 'mat-button-toggle-group',\n    '[attr.aria-disabled]': 'disabled',\n    '[class.mat-button-toggle-vertical]': 'vertical',\n    '[class.mat-button-toggle-group-appearance-standard]': 'appearance === \"standard\"',\n  },\n  exportAs: 'matButtonToggleGroup',\n})\nexport class MatButtonToggleGroup implements ControlValueAccessor, OnInit, AfterContentInit {\n  private _vertical = false;\n  private _multiple = false;\n  private _disabled = false;\n  private _selectionModel: SelectionModel<MatButtonToggle>;\n\n  /**\n   * Reference to the raw value that the consumer tried to assign. The real\n   * value will exclude any values from this one that don't correspond to a\n   * toggle. Useful for the cases where the value is assigned before the toggles\n   * have been initialized or at the same that they're being swapped out.\n   */\n  private _rawValue: any;\n\n  /**\n   * The method to be called in order to update ngModel.\n   * Now `ngModel` binding is not supported in multiple selection mode.\n   */\n  _controlValueAccessorChangeFn: (value: any) => void = () => {};\n\n  /** onTouch function registered via registerOnTouch (ControlValueAccessor). */\n  _onTouched: () => any = () => {};\n\n  /** Child button toggle buttons. */\n  @ContentChildren(forwardRef(() => MatButtonToggle), {\n    // Note that this would technically pick up toggles\n    // from nested groups, but that's not a case that we support.\n    descendants: true\n  }) _buttonToggles: QueryList<MatButtonToggle>;\n\n  /** The appearance for all the buttons in the group. */\n  @Input() appearance: MatButtonToggleAppearance;\n\n  /** `name` attribute for the underlying `input` element. */\n  @Input()\n  get name(): string { return this._name; }\n  set name(value: string) {\n    this._name = value;\n\n    if (this._buttonToggles) {\n      this._buttonToggles.forEach(toggle => {\n        toggle.name = this._name;\n        toggle._markForCheck();\n      });\n    }\n  }\n  private _name = `mat-button-toggle-group-${_uniqueIdCounter++}`;\n\n  /** Whether the toggle group is vertical. */\n  @Input()\n  get vertical(): boolean { return this._vertical; }\n  set vertical(value: boolean) {\n    this._vertical = coerceBooleanProperty(value);\n  }\n\n  /** Value of the toggle group. */\n  @Input()\n  get value(): any {\n    const selected = this._selectionModel ? this._selectionModel.selected : [];\n\n    if (this.multiple) {\n      return selected.map(toggle => toggle.value);\n    }\n\n    return selected[0] ? selected[0].value : undefined;\n  }\n  set value(newValue: any) {\n    this._setSelectionByValue(newValue);\n    this.valueChange.emit(this.value);\n  }\n\n  /**\n   * Event that emits whenever the value of the group changes.\n   * Used to facilitate two-way data binding.\n   * @docs-private\n   */\n  @Output() readonly valueChange = new EventEmitter<any>();\n\n  /** Selected button toggles in the group. */\n  get selected() {\n    const selected = this._selectionModel ? this._selectionModel.selected : [];\n    return this.multiple ? selected : (selected[0] || null);\n  }\n\n  /** Whether multiple button toggles can be selected. */\n  @Input()\n  get multiple(): boolean { return this._multiple; }\n  set multiple(value: boolean) {\n    this._multiple = coerceBooleanProperty(value);\n  }\n\n  /** Whether multiple button toggle group is disabled. */\n  @Input()\n  get disabled(): boolean { return this._disabled; }\n  set disabled(value: boolean) {\n    this._disabled = coerceBooleanProperty(value);\n\n    if (this._buttonToggles) {\n      this._buttonToggles.forEach(toggle => toggle._markForCheck());\n    }\n  }\n\n  /** Event emitted when the group's value changes. */\n  @Output() readonly change: EventEmitter<MatButtonToggleChange> =\n      new EventEmitter<MatButtonToggleChange>();\n\n  constructor(\n    private _changeDetector: ChangeDetectorRef,\n    @Optional() @Inject(MAT_BUTTON_TOGGLE_DEFAULT_OPTIONS)\n        defaultOptions?: MatButtonToggleDefaultOptions) {\n\n      this.appearance =\n          defaultOptions && defaultOptions.appearance ? defaultOptions.appearance : 'standard';\n    }\n\n  ngOnInit() {\n    this._selectionModel = new SelectionModel<MatButtonToggle>(this.multiple, undefined, false);\n  }\n\n  ngAfterContentInit() {\n    this._selectionModel.select(...this._buttonToggles.filter(toggle => toggle.checked));\n  }\n\n  /**\n   * Sets the model value. Implemented as part of ControlValueAccessor.\n   * @param value Value to be set to the model.\n   */\n  writeValue(value: any) {\n    this.value = value;\n    this._changeDetector.markForCheck();\n  }\n\n  // Implemented as part of ControlValueAccessor.\n  registerOnChange(fn: (value: any) => void) {\n    this._controlValueAccessorChangeFn = fn;\n  }\n\n  // Implemented as part of ControlValueAccessor.\n  registerOnTouched(fn: any) {\n    this._onTouched = fn;\n  }\n\n  // Implemented as part of ControlValueAccessor.\n  setDisabledState(isDisabled: boolean): void {\n    this.disabled = isDisabled;\n  }\n\n  /** Dispatch change event with current selection and group value. */\n  _emitChangeEvent(): void {\n    const selected = this.selected;\n    const source = Array.isArray(selected) ? selected[selected.length - 1] : selected;\n    const event = new MatButtonToggleChange(source!, this.value);\n    this._controlValueAccessorChangeFn(event.value);\n    this.change.emit(event);\n  }\n\n  /**\n   * Syncs a button toggle's selected state with the model value.\n   * @param toggle Toggle to be synced.\n   * @param select Whether the toggle should be selected.\n   * @param isUserInput Whether the change was a result of a user interaction.\n   * @param deferEvents Whether to defer emitting the change events.\n   */\n  _syncButtonToggle(toggle: MatButtonToggle,\n                    select: boolean,\n                    isUserInput = false,\n                    deferEvents = false) {\n    // Deselect the currently-selected toggle, if we're in single-selection\n    // mode and the button being toggled isn't selected at the moment.\n    if (!this.multiple && this.selected && !toggle.checked) {\n      (this.selected as MatButtonToggle).checked = false;\n    }\n\n    if (this._selectionModel) {\n      if (select) {\n        this._selectionModel.select(toggle);\n      } else {\n        this._selectionModel.deselect(toggle);\n      }\n    } else {\n      deferEvents = true;\n    }\n\n    // We need to defer in some cases in order to avoid \"changed after checked errors\", however\n    // the side-effect is that we may end up updating the model value out of sequence in others\n    // The `deferEvents` flag allows us to decide whether to do it on a case-by-case basis.\n    if (deferEvents) {\n      Promise.resolve().then(() => this._updateModelValue(isUserInput));\n    } else {\n      this._updateModelValue(isUserInput);\n    }\n  }\n\n  /** Checks whether a button toggle is selected. */\n  _isSelected(toggle: MatButtonToggle) {\n    return this._selectionModel && this._selectionModel.isSelected(toggle);\n  }\n\n  /** Determines whether a button toggle should be checked on init. */\n  _isPrechecked(toggle: MatButtonToggle) {\n    if (typeof this._rawValue === 'undefined') {\n      return false;\n    }\n\n    if (this.multiple && Array.isArray(this._rawValue)) {\n      return this._rawValue.some(value => toggle.value != null && value === toggle.value);\n    }\n\n    return toggle.value === this._rawValue;\n  }\n\n  /** Updates the selection state of the toggles in the group based on a value. */\n  private _setSelectionByValue(value: any|any[]) {\n    this._rawValue = value;\n\n    if (!this._buttonToggles) {\n      return;\n    }\n\n    if (this.multiple && value) {\n      if (!Array.isArray(value) && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n        throw Error('Value must be an array in multiple-selection mode.');\n      }\n\n      this._clearSelection();\n      value.forEach((currentValue: any) => this._selectValue(currentValue));\n    } else {\n      this._clearSelection();\n      this._selectValue(value);\n    }\n  }\n\n  /** Clears the selected toggles. */\n  private _clearSelection() {\n    this._selectionModel.clear();\n    this._buttonToggles.forEach(toggle => toggle.checked = false);\n  }\n\n  /** Selects a value if there's a toggle that corresponds to it. */\n  private _selectValue(value: any) {\n    const correspondingOption = this._buttonToggles.find(toggle => {\n      return toggle.value != null && toggle.value === value;\n    });\n\n    if (correspondingOption) {\n      correspondingOption.checked = true;\n      this._selectionModel.select(correspondingOption);\n    }\n  }\n\n  /** Syncs up the group's value with the model and emits the change event. */\n  private _updateModelValue(isUserInput: boolean) {\n    // Only emit the change event for user input.\n    if (isUserInput) {\n      this._emitChangeEvent();\n    }\n\n    // Note: we emit this one no matter whether it was a user interaction, because\n    // it is used by Angular to sync up the two-way data binding.\n    this.valueChange.emit(this.value);\n  }\n\n  static ngAcceptInputType_disabled: BooleanInput;\n  static ngAcceptInputType_multiple: BooleanInput;\n  static ngAcceptInputType_vertical: BooleanInput;\n}\n\n// Boilerplate for applying mixins to the MatButtonToggle class.\n/** @docs-private */\nclass MatButtonToggleBase {}\nconst _MatButtonToggleMixinBase: CanDisableRippleCtor & typeof MatButtonToggleBase =\n    mixinDisableRipple(MatButtonToggleBase);\n\n/** Single button inside of a toggle group. */\n@Component({\n  selector: 'mat-button-toggle',\n  templateUrl: 'button-toggle.html',\n  styleUrls: ['button-toggle.css'],\n  encapsulation: ViewEncapsulation.None,\n  exportAs: 'matButtonToggle',\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  inputs: ['disableRipple'],\n  host: {\n    '[class.mat-button-toggle-standalone]': '!buttonToggleGroup',\n    '[class.mat-button-toggle-checked]': 'checked',\n    '[class.mat-button-toggle-disabled]': 'disabled',\n    '[class.mat-button-toggle-appearance-standard]': 'appearance === \"standard\"',\n    'class': 'mat-button-toggle',\n    // Always reset the tabindex to -1 so it doesn't conflict with the one on the `button`,\n    // but can still receive focus from things like cdkFocusInitial.\n    '[attr.tabindex]': '-1',\n    '[attr.id]': 'id',\n    '[attr.name]': 'null',\n    '(focus)': 'focus()',\n  }\n})\nexport class MatButtonToggle extends _MatButtonToggleMixinBase implements OnInit, AfterViewInit,\n  CanDisableRipple, OnDestroy {\n\n  private _isSingleSelector = false;\n  private _checked = false;\n\n  /**\n   * Attached to the aria-label attribute of the host element. In most cases, aria-labelledby will\n   * take precedence so this may be omitted.\n   */\n  @Input('aria-label') ariaLabel: string;\n\n  /**\n   * Users can specify the `aria-labelledby` attribute which will be forwarded to the input element\n   */\n  @Input('aria-labelledby') ariaLabelledby: string | null = null;\n\n  @ViewChild('button') _buttonElement: ElementRef<HTMLButtonElement>;\n\n  /** The parent button toggle group (exclusive selection). Optional. */\n  buttonToggleGroup: MatButtonToggleGroup;\n\n  /** Unique ID for the underlying `button` element. */\n  get buttonId(): string { return `${this.id}-button`; }\n\n  /** The unique ID for this button toggle. */\n  @Input() id: string;\n\n  /** HTML's 'name' attribute used to group radios for unique selection. */\n  @Input() name: string;\n\n  /** MatButtonToggleGroup reads this to assign its own value. */\n  @Input() value: any;\n\n  /** Tabindex for the toggle. */\n  @Input() tabIndex: number | null;\n\n  /** The appearance style of the button. */\n  @Input()\n  get appearance(): MatButtonToggleAppearance {\n    return this.buttonToggleGroup ? this.buttonToggleGroup.appearance : this._appearance;\n  }\n  set appearance(value: MatButtonToggleAppearance) {\n    this._appearance = value;\n  }\n  private _appearance: MatButtonToggleAppearance;\n\n  /** Whether the button is checked. */\n  @Input()\n  get checked(): boolean {\n    return this.buttonToggleGroup ? this.buttonToggleGroup._isSelected(this) : this._checked;\n  }\n  set checked(value: boolean) {\n    const newValue = coerceBooleanProperty(value);\n\n    if (newValue !== this._checked) {\n      this._checked = newValue;\n\n      if (this.buttonToggleGroup) {\n        this.buttonToggleGroup._syncButtonToggle(this, this._checked);\n      }\n\n      this._changeDetectorRef.markForCheck();\n    }\n  }\n\n  /** Whether the button is disabled. */\n  @Input()\n  get disabled(): boolean {\n    return this._disabled || (this.buttonToggleGroup && this.buttonToggleGroup.disabled);\n  }\n  set disabled(value: boolean) { this._disabled = coerceBooleanProperty(value); }\n  private _disabled: boolean = false;\n\n  /** Event emitted when the group value changes. */\n  @Output() readonly change: EventEmitter<MatButtonToggleChange> =\n      new EventEmitter<MatButtonToggleChange>();\n\n  constructor(@Optional() @Inject(MAT_BUTTON_TOGGLE_GROUP) toggleGroup: MatButtonToggleGroup,\n              private _changeDetectorRef: ChangeDetectorRef,\n              private _elementRef: ElementRef<HTMLElement>,\n              private _focusMonitor: FocusMonitor,\n              @Attribute('tabindex') defaultTabIndex: string,\n              @Optional() @Inject(MAT_BUTTON_TOGGLE_DEFAULT_OPTIONS)\n                  defaultOptions?: MatButtonToggleDefaultOptions) {\n    super();\n\n    const parsedTabIndex = Number(defaultTabIndex);\n    this.tabIndex = (parsedTabIndex || parsedTabIndex === 0) ? parsedTabIndex : null;\n    this.buttonToggleGroup = toggleGroup;\n    this.appearance =\n        defaultOptions && defaultOptions.appearance ? defaultOptions.appearance : 'standard';\n  }\n\n  ngOnInit() {\n    const group = this.buttonToggleGroup;\n    this._isSingleSelector = group && !group.multiple;\n    this.id = this.id || `mat-button-toggle-${_uniqueIdCounter++}`;\n\n    if (this._isSingleSelector) {\n      this.name = group.name;\n    }\n\n    if (group) {\n      if (group._isPrechecked(this)) {\n        this.checked = true;\n      } else if (group._isSelected(this) !== this._checked) {\n        // As as side effect of the circular dependency between the toggle group and the button,\n        // we may end up in a state where the button is supposed to be checked on init, but it\n        // isn't, because the checked value was assigned too early. This can happen when Ivy\n        // assigns the static input value before the `ngOnInit` has run.\n        group._syncButtonToggle(this, this._checked);\n      }\n    }\n  }\n\n  ngAfterViewInit() {\n    this._focusMonitor.monitor(this._elementRef, true);\n  }\n\n  ngOnDestroy() {\n    const group = this.buttonToggleGroup;\n\n    this._focusMonitor.stopMonitoring(this._elementRef);\n\n    // Remove the toggle from the selection once it's destroyed. Needs to happen\n    // on the next tick in order to avoid \"changed after checked\" errors.\n    if (group && group._isSelected(this)) {\n      group._syncButtonToggle(this, false, false, true);\n    }\n  }\n\n  /** Focuses the button. */\n  focus(options?: FocusOptions): void {\n    this._buttonElement.nativeElement.focus(options);\n  }\n\n  /** Checks the button toggle due to an interaction with the underlying native button. */\n  _onButtonClick() {\n    const newChecked = this._isSingleSelector ? true : !this._checked;\n\n    if (newChecked !== this._checked) {\n      this._checked = newChecked;\n      if (this.buttonToggleGroup) {\n        this.buttonToggleGroup._syncButtonToggle(this, this._checked, true);\n        this.buttonToggleGroup._onTouched();\n      }\n    }\n    // Emit a change event when it's the single selector\n    this.change.emit(new MatButtonToggleChange(this, this.value));\n  }\n\n  /**\n   * Marks the button toggle as needing checking for change detection.\n   * This method is exposed because the parent button toggle group will directly\n   * update bound properties of the radio button.\n   */\n  _markForCheck() {\n    // When the group value changes, the button will not be notified.\n    // Use `markForCheck` to explicit update button toggle's status.\n    this._changeDetectorRef.markForCheck();\n  }\n\n  static ngAcceptInputType_checked: BooleanInput;\n  static ngAcceptInputType_disabled: BooleanInput;\n  static ngAcceptInputType_vertical: BooleanInput;\n  static ngAcceptInputType_multiple: BooleanInput;\n  static ngAcceptInputType_disableRipple: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgModule} from '@angular/core';\nimport {MatCommonModule, MatRippleModule} from '@angular/material/core';\nimport {MatButtonToggle, MatButtonToggleGroup} from './button-toggle';\n\n\n@NgModule({\n  imports: [MatCommonModule, MatRippleModule],\n  exports: [MatCommonModule, MatButtonToggleGroup, MatButtonToggle],\n  declarations: [MatButtonToggleGroup, MatButtonToggle],\n})\nexport class MatButtonToggleModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './button-toggle';\nexport * from './button-toggle-module';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar pluck_1 = require(\"../../operator/pluck\");\nrxjs_1.Observable.prototype.pluck = pluck_1.pluck;\n//# sourceMappingURL=pluck.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ɵDomAdapter as DomAdapter} from '@angular/common';\n\n\n\n/**\n * Provides DOM operations in any browser environment.\n *\n * @security Tread carefully! Interacting with the DOM directly is dangerous and\n * can introduce XSS risks.\n */\nexport abstract class GenericBrowserDomAdapter extends DomAdapter {\n  constructor() {\n    super();\n  }\n\n  supportsDOMEvents(): boolean {\n    return true;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ɵparseCookieValue as parseCookieValue, ɵsetRootDomAdapter as setRootDomAdapter} from '@angular/common';\nimport {ɵglobal as global} from '@angular/core';\n\nimport {GenericBrowserDomAdapter} from './generic_browser_adapter';\n\nconst nodeContains: (this: Node, other: Node) => boolean = (() => {\n  if (global['Node']) {\n    return global['Node'].prototype.contains || function(this: Node, node: any) {\n      return !!(this.compareDocumentPosition(node) & 16);\n    };\n  }\n\n  return undefined as any;\n})();\n\n/**\n * A `DomAdapter` powered by full browser DOM APIs.\n *\n * @security Tread carefully! Interacting with the DOM directly is dangerous and\n * can introduce XSS risks.\n */\n/* tslint:disable:requireParameterType no-console */\nexport class BrowserDomAdapter extends GenericBrowserDomAdapter {\n  static makeCurrent() {\n    setRootDomAdapter(new BrowserDomAdapter());\n  }\n  getProperty(el: Node, name: string): any {\n    return (<any>el)[name];\n  }\n\n  log(error: string): void {\n    if (window.console) {\n      window.console.log && window.console.log(error);\n    }\n  }\n\n  logGroup(error: string): void {\n    if (window.console) {\n      window.console.group && window.console.group(error);\n    }\n  }\n\n  logGroupEnd(): void {\n    if (window.console) {\n      window.console.groupEnd && window.console.groupEnd();\n    }\n  }\n\n  onAndCancel(el: Node, evt: any, listener: any): Function {\n    el.addEventListener(evt, listener, false);\n    // Needed to follow Dart's subscription semantic, until fix of\n    // https://code.google.com/p/dart/issues/detail?id=17406\n    return () => {\n      el.removeEventListener(evt, listener, false);\n    };\n  }\n  dispatchEvent(el: Node, evt: any) {\n    el.dispatchEvent(evt);\n  }\n  remove(node: Node): Node {\n    if (node.parentNode) {\n      node.parentNode.removeChild(node);\n    }\n    return node;\n  }\n  getValue(el: any): string {\n    return el.value;\n  }\n  createElement(tagName: string, doc?: Document): HTMLElement {\n    doc = doc || this.getDefaultDocument();\n    return doc.createElement(tagName);\n  }\n  createHtmlDocument(): HTMLDocument {\n    return document.implementation.createHTMLDocument('fakeTitle');\n  }\n  getDefaultDocument(): Document {\n    return document;\n  }\n\n  isElementNode(node: Node): boolean {\n    return node.nodeType === Node.ELEMENT_NODE;\n  }\n\n  isShadowRoot(node: any): boolean {\n    return node instanceof DocumentFragment;\n  }\n\n  getGlobalEventTarget(doc: Document, target: string): EventTarget|null {\n    if (target === 'window') {\n      return window;\n    }\n    if (target === 'document') {\n      return doc;\n    }\n    if (target === 'body') {\n      return doc.body;\n    }\n    return null;\n  }\n  getHistory(): History {\n    return window.history;\n  }\n  getLocation(): Location {\n    return window.location;\n  }\n  getBaseHref(doc: Document): string|null {\n    const href = getBaseElementHref();\n    return href == null ? null : relativePath(href);\n  }\n  resetBaseElement(): void {\n    baseElement = null;\n  }\n  getUserAgent(): string {\n    return window.navigator.userAgent;\n  }\n  performanceNow(): number {\n    // performance.now() is not available in all browsers, see\n    // http://caniuse.com/#search=performance.now\n    return window.performance && window.performance.now ? window.performance.now() :\n                                                          new Date().getTime();\n  }\n\n  supportsCookies(): boolean {\n    return true;\n  }\n\n  getCookie(name: string): string|null {\n    return parseCookieValue(document.cookie, name);\n  }\n}\n\nlet baseElement: HTMLElement|null = null;\nfunction getBaseElementHref(): string|null {\n  if (!baseElement) {\n    baseElement = document.querySelector('base')!;\n    if (!baseElement) {\n      return null;\n    }\n  }\n  return baseElement.getAttribute('href');\n}\n\n// based on urlUtils.js in AngularJS 1\nlet urlParsingNode: any;\nfunction relativePath(url: any): string {\n  if (!urlParsingNode) {\n    urlParsingNode = document.createElement('a');\n  }\n  urlParsingNode.setAttribute('href', url);\n  return (urlParsingNode.pathname.charAt(0) === '/') ? urlParsingNode.pathname :\n                                                       '/' + urlParsingNode.pathname;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT, ɵgetDOM as getDOM} from '@angular/common';\nimport {APP_INITIALIZER, ApplicationInitStatus, Inject, InjectionToken, Injector, StaticProvider} from '@angular/core';\n\n/**\n * An id that identifies a particular application being bootstrapped, that should\n * match across the client/server boundary.\n */\nexport const TRANSITION_ID = new InjectionToken('TRANSITION_ID');\n\nexport function appInitializerFactory(transitionId: string, document: any, injector: Injector) {\n  return () => {\n    // Wait for all application initializers to be completed before removing the styles set by\n    // the server.\n    injector.get(ApplicationInitStatus).donePromise.then(() => {\n      const dom = getDOM();\n      const styles: any[] =\n          Array.prototype.slice.apply(document.querySelectorAll(`style[ng-transition]`));\n      styles.filter(el => el.getAttribute('ng-transition') === transitionId)\n          .forEach(el => dom.remove(el));\n    });\n  };\n}\n\nexport const SERVER_TRANSITION_PROVIDERS: StaticProvider[] = [\n  {\n    provide: APP_INITIALIZER,\n    useFactory: appInitializerFactory,\n    deps: [TRANSITION_ID, DOCUMENT, Injector],\n    multi: true\n  },\n];\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ɵgetDOM as getDOM} from '@angular/common';\nimport {GetTestability, setTestabilityGetter, Testability, TestabilityRegistry, ɵglobal as global} from '@angular/core';\n\nexport class BrowserGetTestability implements GetTestability {\n  static init() {\n    setTestabilityGetter(new BrowserGetTestability());\n  }\n\n  addToWindow(registry: TestabilityRegistry): void {\n    global['getAngularTestability'] = (elem: any, findInAncestors: boolean = true) => {\n      const testability = registry.findTestabilityInTree(elem, findInAncestors);\n      if (testability == null) {\n        throw new Error('Could not find testability for element.');\n      }\n      return testability;\n    };\n\n    global['getAllAngularTestabilities'] = () => registry.getAllTestabilities();\n\n    global['getAllAngularRootElements'] = () => registry.getAllRootElements();\n\n    const whenAllStable = (callback: any /** TODO #9100 */) => {\n      const testabilities = global['getAllAngularTestabilities']();\n      let count = testabilities.length;\n      let didWork = false;\n      const decrement = function(didWork_: any /** TODO #9100 */) {\n        didWork = didWork || didWork_;\n        count--;\n        if (count == 0) {\n          callback(didWork);\n        }\n      };\n      testabilities.forEach(function(testability: any /** TODO #9100 */) {\n        testability.whenStable(decrement);\n      });\n    };\n\n    if (!global['frameworkStabilizers']) {\n      global['frameworkStabilizers'] = [];\n    }\n    global['frameworkStabilizers'].push(whenAllStable);\n  }\n\n  findTestabilityInTree(registry: TestabilityRegistry, elem: any, findInAncestors: boolean):\n      Testability|null {\n    if (elem == null) {\n      return null;\n    }\n    const t = registry.getTestability(elem);\n    if (t != null) {\n      return t;\n    } else if (!findInAncestors) {\n      return null;\n    }\n    if (getDOM().isShadowRoot(elem)) {\n      return this.findTestabilityInTree(registry, (<any>elem).host, true);\n    }\n    return this.findTestabilityInTree(registry, elem.parentElement, true);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ɵglobal as global} from '@angular/core';\n\nconst CAMEL_CASE_REGEXP = /([A-Z])/g;\nconst DASH_CASE_REGEXP = /-([a-z])/g;\n\n\nexport function camelCaseToDashCase(input: string): string {\n  return input.replace(CAMEL_CASE_REGEXP, (...m: string[]) => '-' + m[1].toLowerCase());\n}\n\nexport function dashCaseToCamelCase(input: string): string {\n  return input.replace(DASH_CASE_REGEXP, (...m: string[]) => m[1].toUpperCase());\n}\n\n/**\n * Exports the value under a given `name` in the global property `ng`. For example `ng.probe` if\n * `name` is `'probe'`.\n * @param name Name under which it will be exported. Keep in mind this will be a property of the\n * global `ng` object.\n * @param value The value to export.\n */\nexport function exportNgVar(name: string, value: any): void {\n  if (typeof COMPILED === 'undefined' || !COMPILED) {\n    // Note: we can't export `ng` when using closure enhanced optimization as:\n    // - closure declares globals itself for minified names, which sometimes clobber our `ng` global\n    // - we can't declare a closure extern as the namespace `ng` is already used within Google\n    //   for typings for angularJS (via `goog.provide('ng....')`).\n    const ng = global['ng'] = (global['ng'] as {[key: string]: any} | undefined) || {};\n    ng[name] = value;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {APP_INITIALIZER, ApplicationRef, DebugNode, NgProbeToken, NgZone, Optional, Provider, ɵgetDebugNodeR2} from '@angular/core';\n\nimport {exportNgVar} from '../util';\n\nconst CORE_TOKENS = (() => ({\n                       'ApplicationRef': ApplicationRef,\n                       'NgZone': NgZone,\n                     }))();\n\nconst INSPECT_GLOBAL_NAME = 'probe';\nconst CORE_TOKENS_GLOBAL_NAME = 'coreTokens';\n\n/**\n * Returns a {@link DebugElement} for the given native DOM element, or\n * null if the given native element does not have an Angular view associated\n * with it.\n */\nexport function inspectNativeElementR2(element: any): DebugNode|null {\n  return ɵgetDebugNodeR2(element);\n}\n\nexport function _createNgProbeR2(coreTokens: NgProbeToken[]): any {\n  exportNgVar(INSPECT_GLOBAL_NAME, inspectNativeElementR2);\n  exportNgVar(CORE_TOKENS_GLOBAL_NAME, {...CORE_TOKENS, ..._ngProbeTokensToMap(coreTokens || [])});\n  return () => inspectNativeElementR2;\n}\n\nfunction _ngProbeTokensToMap(tokens: NgProbeToken[]): {[name: string]: any} {\n  return tokens.reduce((prev: any, t: any) => (prev[t.name] = t.token, prev), {});\n}\n\n/**\n * In Ivy, we don't support NgProbe because we have our own set of testing utilities\n * with more robust functionality.\n *\n * We shouldn't bring in NgProbe because it prevents DebugNode and friends from\n * tree-shaking properly.\n */\nexport const ELEMENT_PROBE_PROVIDERS__POST_R3__ = [];\n\n/**\n * Providers which support debugging Angular applications (e.g. via `ng.probe`).\n */\nexport const ELEMENT_PROBE_PROVIDERS__PRE_R3__: Provider[] = [\n  {\n    provide: APP_INITIALIZER,\n    useFactory: _createNgProbeR2,\n    deps: [\n      [NgProbeToken, new Optional()],\n    ],\n    multi: true,\n  },\n];\n\nexport const ELEMENT_PROBE_PROVIDERS = ELEMENT_PROBE_PROVIDERS__PRE_R3__;\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ɵgetDOM as getDOM} from '@angular/common';\nimport {Inject, Injectable, InjectionToken, NgZone} from '@angular/core';\n\n/**\n * The injection token for the event-manager plug-in service.\n *\n * @publicApi\n */\nexport const EVENT_MANAGER_PLUGINS =\n    new InjectionToken<EventManagerPlugin[]>('EventManagerPlugins');\n\n/**\n * An injectable service that provides event management for Angular\n * through a browser plug-in.\n *\n * @publicApi\n */\n@Injectable()\nexport class EventManager {\n  private _plugins: EventManagerPlugin[];\n  private _eventNameToPlugin = new Map<string, EventManagerPlugin>();\n\n  /**\n   * Initializes an instance of the event-manager service.\n   */\n  constructor(@Inject(EVENT_MANAGER_PLUGINS) plugins: EventManagerPlugin[], private _zone: NgZone) {\n    plugins.forEach(p => p.manager = this);\n    this._plugins = plugins.slice().reverse();\n  }\n\n  /**\n   * Registers a handler for a specific element and event.\n   *\n   * @param element The HTML element to receive event notifications.\n   * @param eventName The name of the event to listen for.\n   * @param handler A function to call when the notification occurs. Receives the\n   * event object as an argument.\n   * @returns  A callback function that can be used to remove the handler.\n   */\n  addEventListener(element: HTMLElement, eventName: string, handler: Function): Function {\n    const plugin = this._findPluginFor(eventName);\n    return plugin.addEventListener(element, eventName, handler);\n  }\n\n  /**\n   * Registers a global handler for an event in a target view.\n   *\n   * @param target A target for global event notifications. One of \"window\", \"document\", or \"body\".\n   * @param eventName The name of the event to listen for.\n   * @param handler A function to call when the notification occurs. Receives the\n   * event object as an argument.\n   * @returns A callback function that can be used to remove the handler.\n   */\n  addGlobalEventListener(target: string, eventName: string, handler: Function): Function {\n    const plugin = this._findPluginFor(eventName);\n    return plugin.addGlobalEventListener(target, eventName, handler);\n  }\n\n  /**\n   * Retrieves the compilation zone in which event listeners are registered.\n   */\n  getZone(): NgZone {\n    return this._zone;\n  }\n\n  /** @internal */\n  _findPluginFor(eventName: string): EventManagerPlugin {\n    const plugin = this._eventNameToPlugin.get(eventName);\n    if (plugin) {\n      return plugin;\n    }\n\n    const plugins = this._plugins;\n    for (let i = 0; i < plugins.length; i++) {\n      const plugin = plugins[i];\n      if (plugin.supports(eventName)) {\n        this._eventNameToPlugin.set(eventName, plugin);\n        return plugin;\n      }\n    }\n    throw new Error(`No event manager plugin found for event ${eventName}`);\n  }\n}\n\nexport abstract class EventManagerPlugin {\n  constructor(private _doc: any) {}\n\n  // TODO(issue/24571): remove '!'.\n  manager!: EventManager;\n\n  abstract supports(eventName: string): boolean;\n\n  abstract addEventListener(element: HTMLElement, eventName: string, handler: Function): Function;\n\n  addGlobalEventListener(element: string, eventName: string, handler: Function): Function {\n    const target: HTMLElement = getDOM().getGlobalEventTarget(this._doc, element);\n    if (!target) {\n      throw new Error(`Unsupported event target ${target} for event ${eventName}`);\n    }\n    return this.addEventListener(target, eventName, handler);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT, ɵgetDOM as getDOM} from '@angular/common';\nimport {Inject, Injectable, OnDestroy} from '@angular/core';\n\n@Injectable()\nexport class SharedStylesHost {\n  /** @internal */\n  protected _stylesSet = new Set<string>();\n\n  addStyles(styles: string[]): void {\n    const additions = new Set<string>();\n    styles.forEach(style => {\n      if (!this._stylesSet.has(style)) {\n        this._stylesSet.add(style);\n        additions.add(style);\n      }\n    });\n    this.onStylesAdded(additions);\n  }\n\n  onStylesAdded(additions: Set<string>): void {}\n\n  getAllStyles(): string[] {\n    return Array.from(this._stylesSet);\n  }\n}\n\n@Injectable()\nexport class DomSharedStylesHost extends SharedStylesHost implements OnDestroy {\n  private _hostNodes = new Set<Node>();\n  private _styleNodes = new Set<Node>();\n  constructor(@Inject(DOCUMENT) private _doc: any) {\n    super();\n    this._hostNodes.add(_doc.head);\n  }\n\n  private _addStylesToHost(styles: Set<string>, host: Node): void {\n    styles.forEach((style: string) => {\n      const styleEl = this._doc.createElement('style');\n      styleEl.textContent = style;\n      this._styleNodes.add(host.appendChild(styleEl));\n    });\n  }\n\n  addHost(hostNode: Node): void {\n    this._addStylesToHost(this._stylesSet, hostNode);\n    this._hostNodes.add(hostNode);\n  }\n\n  removeHost(hostNode: Node): void {\n    this._hostNodes.delete(hostNode);\n  }\n\n  onStylesAdded(additions: Set<string>): void {\n    this._hostNodes.forEach(hostNode => this._addStylesToHost(additions, hostNode));\n  }\n\n  ngOnDestroy(): void {\n    this._styleNodes.forEach(styleNode => getDOM().remove(styleNode));\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {APP_ID, Inject, Injectable, Renderer2, RendererFactory2, RendererStyleFlags2, RendererType2, ViewEncapsulation} from '@angular/core';\n\nimport {EventManager} from './events/event_manager';\nimport {DomSharedStylesHost} from './shared_styles_host';\n\nexport const NAMESPACE_URIS: {[ns: string]: string} = {\n  'svg': 'http://www.w3.org/2000/svg',\n  'xhtml': 'http://www.w3.org/1999/xhtml',\n  'xlink': 'http://www.w3.org/1999/xlink',\n  'xml': 'http://www.w3.org/XML/1998/namespace',\n  'xmlns': 'http://www.w3.org/2000/xmlns/',\n};\n\nconst COMPONENT_REGEX = /%COMP%/g;\nconst NG_DEV_MODE = typeof ngDevMode === 'undefined' || !!ngDevMode;\n\nexport const COMPONENT_VARIABLE = '%COMP%';\nexport const HOST_ATTR = `_nghost-${COMPONENT_VARIABLE}`;\nexport const CONTENT_ATTR = `_ngcontent-${COMPONENT_VARIABLE}`;\n\nexport function shimContentAttribute(componentShortId: string): string {\n  return CONTENT_ATTR.replace(COMPONENT_REGEX, componentShortId);\n}\n\nexport function shimHostAttribute(componentShortId: string): string {\n  return HOST_ATTR.replace(COMPONENT_REGEX, componentShortId);\n}\n\nexport function flattenStyles(\n    compId: string, styles: Array<any|any[]>, target: string[]): string[] {\n  for (let i = 0; i < styles.length; i++) {\n    let style = styles[i];\n\n    if (Array.isArray(style)) {\n      flattenStyles(compId, style, target);\n    } else {\n      style = style.replace(COMPONENT_REGEX, compId);\n      target.push(style);\n    }\n  }\n  return target;\n}\n\nfunction decoratePreventDefault(eventHandler: Function): Function {\n  // `DebugNode.triggerEventHandler` needs to know if the listener was created with\n  // decoratePreventDefault or is a listener added outside the Angular context so it can handle the\n  // two differently. In the first case, the special '__ngUnwrap__' token is passed to the unwrap\n  // the listener (see below).\n  return (event: any) => {\n    // Ivy uses '__ngUnwrap__' as a special token that allows us to unwrap the function\n    // so that it can be invoked programmatically by `DebugNode.triggerEventHandler`. The debug_node\n    // can inspect the listener toString contents for the existence of this special token. Because\n    // the token is a string literal, it is ensured to not be modified by compiled code.\n    if (event === '__ngUnwrap__') {\n      return eventHandler;\n    }\n\n    const allowDefaultBehavior = eventHandler(event);\n    if (allowDefaultBehavior === false) {\n      // TODO(tbosch): move preventDefault into event plugins...\n      event.preventDefault();\n      event.returnValue = false;\n    }\n\n    return undefined;\n  };\n}\n\n@Injectable()\nexport class DomRendererFactory2 implements RendererFactory2 {\n  private rendererByCompId = new Map<string, Renderer2>();\n  private defaultRenderer: Renderer2;\n\n  constructor(\n      private eventManager: EventManager, private sharedStylesHost: DomSharedStylesHost,\n      @Inject(APP_ID) private appId: string) {\n    this.defaultRenderer = new DefaultDomRenderer2(eventManager);\n  }\n\n  createRenderer(element: any, type: RendererType2|null): Renderer2 {\n    if (!element || !type) {\n      return this.defaultRenderer;\n    }\n    switch (type.encapsulation) {\n      case ViewEncapsulation.Emulated: {\n        let renderer = this.rendererByCompId.get(type.id);\n        if (!renderer) {\n          renderer = new EmulatedEncapsulationDomRenderer2(\n              this.eventManager, this.sharedStylesHost, type, this.appId);\n          this.rendererByCompId.set(type.id, renderer);\n        }\n        (<EmulatedEncapsulationDomRenderer2>renderer).applyToHost(element);\n        return renderer;\n      }\n      case ViewEncapsulation.Native:\n      case ViewEncapsulation.ShadowDom:\n        return new ShadowDomRenderer(this.eventManager, this.sharedStylesHost, element, type);\n      default: {\n        if (!this.rendererByCompId.has(type.id)) {\n          const styles = flattenStyles(type.id, type.styles, []);\n          this.sharedStylesHost.addStyles(styles);\n          this.rendererByCompId.set(type.id, this.defaultRenderer);\n        }\n        return this.defaultRenderer;\n      }\n    }\n  }\n\n  begin() {}\n  end() {}\n}\n\nclass DefaultDomRenderer2 implements Renderer2 {\n  data: {[key: string]: any} = Object.create(null);\n\n  constructor(private eventManager: EventManager) {}\n\n  destroy(): void {}\n\n  destroyNode: null;\n\n  createElement(name: string, namespace?: string): any {\n    if (namespace) {\n      // In cases where Ivy (not ViewEngine) is giving us the actual namespace, the look up by key\n      // will result in undefined, so we just return the namespace here.\n      return document.createElementNS(NAMESPACE_URIS[namespace] || namespace, name);\n    }\n\n    return document.createElement(name);\n  }\n\n  createComment(value: string): any {\n    return document.createComment(value);\n  }\n\n  createText(value: string): any {\n    return document.createTextNode(value);\n  }\n\n  appendChild(parent: any, newChild: any): void {\n    parent.appendChild(newChild);\n  }\n\n  insertBefore(parent: any, newChild: any, refChild: any): void {\n    if (parent) {\n      parent.insertBefore(newChild, refChild);\n    }\n  }\n\n  removeChild(parent: any, oldChild: any): void {\n    if (parent) {\n      parent.removeChild(oldChild);\n    }\n  }\n\n  selectRootElement(selectorOrNode: string|any, preserveContent?: boolean): any {\n    let el: any = typeof selectorOrNode === 'string' ? document.querySelector(selectorOrNode) :\n                                                       selectorOrNode;\n    if (!el) {\n      throw new Error(`The selector \"${selectorOrNode}\" did not match any elements`);\n    }\n    if (!preserveContent) {\n      el.textContent = '';\n    }\n    return el;\n  }\n\n  parentNode(node: any): any {\n    return node.parentNode;\n  }\n\n  nextSibling(node: any): any {\n    return node.nextSibling;\n  }\n\n  setAttribute(el: any, name: string, value: string, namespace?: string): void {\n    if (namespace) {\n      name = namespace + ':' + name;\n      // TODO(FW-811): Ivy may cause issues here because it's passing around\n      // full URIs for namespaces, therefore this lookup will fail.\n      const namespaceUri = NAMESPACE_URIS[namespace];\n      if (namespaceUri) {\n        el.setAttributeNS(namespaceUri, name, value);\n      } else {\n        el.setAttribute(name, value);\n      }\n    } else {\n      el.setAttribute(name, value);\n    }\n  }\n\n  removeAttribute(el: any, name: string, namespace?: string): void {\n    if (namespace) {\n      // TODO(FW-811): Ivy may cause issues here because it's passing around\n      // full URIs for namespaces, therefore this lookup will fail.\n      const namespaceUri = NAMESPACE_URIS[namespace];\n      if (namespaceUri) {\n        el.removeAttributeNS(namespaceUri, name);\n      } else {\n        // TODO(FW-811): Since ivy is passing around full URIs for namespaces\n        // this could result in properties like `http://www.w3.org/2000/svg:cx=\"123\"`,\n        // which is wrong.\n        el.removeAttribute(`${namespace}:${name}`);\n      }\n    } else {\n      el.removeAttribute(name);\n    }\n  }\n\n  addClass(el: any, name: string): void {\n    el.classList.add(name);\n  }\n\n  removeClass(el: any, name: string): void {\n    el.classList.remove(name);\n  }\n\n  setStyle(el: any, style: string, value: any, flags: RendererStyleFlags2): void {\n    if (flags & RendererStyleFlags2.DashCase) {\n      el.style.setProperty(\n          style, value, !!(flags & RendererStyleFlags2.Important) ? 'important' : '');\n    } else {\n      el.style[style] = value;\n    }\n  }\n\n  removeStyle(el: any, style: string, flags: RendererStyleFlags2): void {\n    if (flags & RendererStyleFlags2.DashCase) {\n      el.style.removeProperty(style);\n    } else {\n      // IE requires '' instead of null\n      // see https://github.com/angular/angular/issues/7916\n      el.style[style] = '';\n    }\n  }\n\n  setProperty(el: any, name: string, value: any): void {\n    NG_DEV_MODE && checkNoSyntheticProp(name, 'property');\n    el[name] = value;\n  }\n\n  setValue(node: any, value: string): void {\n    node.nodeValue = value;\n  }\n\n  listen(target: 'window'|'document'|'body'|any, event: string, callback: (event: any) => boolean):\n      () => void {\n    NG_DEV_MODE && checkNoSyntheticProp(event, 'listener');\n    if (typeof target === 'string') {\n      return <() => void>this.eventManager.addGlobalEventListener(\n          target, event, decoratePreventDefault(callback));\n    }\n    return <() => void>this.eventManager.addEventListener(\n               target, event, decoratePreventDefault(callback)) as () => void;\n  }\n}\n\nconst AT_CHARCODE = (() => '@'.charCodeAt(0))();\nfunction checkNoSyntheticProp(name: string, nameKind: string) {\n  if (name.charCodeAt(0) === AT_CHARCODE) {\n    throw new Error(`Found the synthetic ${nameKind} ${\n        name}. Please include either \"BrowserAnimationsModule\" or \"NoopAnimationsModule\" in your application.`);\n  }\n}\n\nclass EmulatedEncapsulationDomRenderer2 extends DefaultDomRenderer2 {\n  private contentAttr: string;\n  private hostAttr: string;\n\n  constructor(\n      eventManager: EventManager, sharedStylesHost: DomSharedStylesHost,\n      private component: RendererType2, appId: string) {\n    super(eventManager);\n    const styles = flattenStyles(appId + '-' + component.id, component.styles, []);\n    sharedStylesHost.addStyles(styles);\n\n    this.contentAttr = shimContentAttribute(appId + '-' + component.id);\n    this.hostAttr = shimHostAttribute(appId + '-' + component.id);\n  }\n\n  applyToHost(element: any) {\n    super.setAttribute(element, this.hostAttr, '');\n  }\n\n  createElement(parent: any, name: string): Element {\n    const el = super.createElement(parent, name);\n    super.setAttribute(el, this.contentAttr, '');\n    return el;\n  }\n}\n\nclass ShadowDomRenderer extends DefaultDomRenderer2 {\n  private shadowRoot: any;\n\n  constructor(\n      eventManager: EventManager, private sharedStylesHost: DomSharedStylesHost,\n      private hostEl: any, private component: RendererType2) {\n    super(eventManager);\n    if (component.encapsulation === ViewEncapsulation.ShadowDom) {\n      this.shadowRoot = (hostEl as any).attachShadow({mode: 'open'});\n    } else {\n      this.shadowRoot = (hostEl as any).createShadowRoot();\n    }\n    this.sharedStylesHost.addHost(this.shadowRoot);\n    const styles = flattenStyles(component.id, component.styles, []);\n    for (let i = 0; i < styles.length; i++) {\n      const styleEl = document.createElement('style');\n      styleEl.textContent = styles[i];\n      this.shadowRoot.appendChild(styleEl);\n    }\n  }\n\n  private nodeOrShadowRoot(node: any): any {\n    return node === this.hostEl ? this.shadowRoot : node;\n  }\n\n  destroy() {\n    this.sharedStylesHost.removeHost(this.shadowRoot);\n  }\n\n  appendChild(parent: any, newChild: any): void {\n    return super.appendChild(this.nodeOrShadowRoot(parent), newChild);\n  }\n  insertBefore(parent: any, newChild: any, refChild: any): void {\n    return super.insertBefore(this.nodeOrShadowRoot(parent), newChild, refChild);\n  }\n  removeChild(parent: any, oldChild: any): void {\n    return super.removeChild(this.nodeOrShadowRoot(parent), oldChild);\n  }\n  parentNode(node: any): any {\n    return this.nodeOrShadowRoot(super.parentNode(this.nodeOrShadowRoot(node)));\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT} from '@angular/common';\nimport {Inject, Injectable} from '@angular/core';\n\nimport {EventManagerPlugin} from './event_manager';\n\n@Injectable()\nexport class DomEventsPlugin extends EventManagerPlugin {\n  constructor(@Inject(DOCUMENT) doc: any) {\n    super(doc);\n  }\n\n  // This plugin should come last in the list of plugins, because it accepts all\n  // events.\n  supports(eventName: string): boolean {\n    return true;\n  }\n\n  addEventListener(element: HTMLElement, eventName: string, handler: Function): Function {\n    element.addEventListener(eventName, handler as EventListener, false);\n    return () => this.removeEventListener(element, eventName, handler as EventListener);\n  }\n\n  removeEventListener(target: any, eventName: string, callback: Function): void {\n    return target.removeEventListener(eventName, callback as EventListener);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT} from '@angular/common';\nimport {Inject, Injectable, InjectionToken, NgModule, Optional, Provider, ɵConsole as Console} from '@angular/core';\n\nimport {EVENT_MANAGER_PLUGINS, EventManagerPlugin} from './event_manager';\n\n\n\n/**\n * Supported HammerJS recognizer event names.\n */\nconst EVENT_NAMES = {\n  // pan\n  'pan': true,\n  'panstart': true,\n  'panmove': true,\n  'panend': true,\n  'pancancel': true,\n  'panleft': true,\n  'panright': true,\n  'panup': true,\n  'pandown': true,\n  // pinch\n  'pinch': true,\n  'pinchstart': true,\n  'pinchmove': true,\n  'pinchend': true,\n  'pinchcancel': true,\n  'pinchin': true,\n  'pinchout': true,\n  // press\n  'press': true,\n  'pressup': true,\n  // rotate\n  'rotate': true,\n  'rotatestart': true,\n  'rotatemove': true,\n  'rotateend': true,\n  'rotatecancel': true,\n  // swipe\n  'swipe': true,\n  'swipeleft': true,\n  'swiperight': true,\n  'swipeup': true,\n  'swipedown': true,\n  // tap\n  'tap': true,\n};\n\n/**\n * DI token for providing [HammerJS](http://hammerjs.github.io/) support to Angular.\n * @see `HammerGestureConfig`\n *\n * @ngModule HammerModule\n * @publicApi\n */\nexport const HAMMER_GESTURE_CONFIG = new InjectionToken<HammerGestureConfig>('HammerGestureConfig');\n\n\n/**\n * Function that loads HammerJS, returning a promise that is resolved once HammerJs is loaded.\n *\n * @publicApi\n */\nexport type HammerLoader = () => Promise<void>;\n\n/**\n * Injection token used to provide a {@link HammerLoader} to Angular.\n *\n * @publicApi\n */\nexport const HAMMER_LOADER = new InjectionToken<HammerLoader>('HammerLoader');\n\nexport interface HammerInstance {\n  on(eventName: string, callback?: Function): void;\n  off(eventName: string, callback?: Function): void;\n  destroy?(): void;\n}\n\n/**\n * An injectable [HammerJS Manager](http://hammerjs.github.io/api/#hammer.manager)\n * for gesture recognition. Configures specific event recognition.\n * @publicApi\n */\n@Injectable()\nexport class HammerGestureConfig {\n  /**\n   * A set of supported event names for gestures to be used in Angular.\n   * Angular supports all built-in recognizers, as listed in\n   * [HammerJS documentation](http://hammerjs.github.io/).\n   */\n  events: string[] = [];\n\n  /**\n   * Maps gesture event names to a set of configuration options\n   * that specify overrides to the default values for specific properties.\n   *\n   * The key is a supported event name to be configured,\n   * and the options object contains a set of properties, with override values\n   * to be applied to the named recognizer event.\n   * For example, to disable recognition of the rotate event, specify\n   *  `{\"rotate\": {\"enable\": false}}`.\n   *\n   * Properties that are not present take the HammerJS default values.\n   * For information about which properties are supported for which events,\n   * and their allowed and default values, see\n   * [HammerJS documentation](http://hammerjs.github.io/).\n   *\n   */\n  overrides: {[key: string]: Object} = {};\n\n  /**\n   * Properties whose default values can be overridden for a given event.\n   * Different sets of properties apply to different events.\n   * For information about which properties are supported for which events,\n   * and their allowed and default values, see\n   * [HammerJS documentation](http://hammerjs.github.io/).\n   */\n  options?: {\n    cssProps?: any;\n    domEvents?: boolean;\n    enable?: boolean | ((manager: any) => boolean);\n    preset?: any[];\n    touchAction?: string;\n    recognizers?: any[];\n    inputClass?: any;\n    inputTarget?: EventTarget;\n  };\n\n  /**\n   * Creates a [HammerJS Manager](http://hammerjs.github.io/api/#hammer.manager)\n   * and attaches it to a given HTML element.\n   * @param element The element that will recognize gestures.\n   * @returns A HammerJS event-manager object.\n   */\n  buildHammer(element: HTMLElement): HammerInstance {\n    const mc = new Hammer!(element, this.options);\n\n    mc.get('pinch').set({enable: true});\n    mc.get('rotate').set({enable: true});\n\n    for (const eventName in this.overrides) {\n      mc.get(eventName).set(this.overrides[eventName]);\n    }\n\n    return mc;\n  }\n}\n\n/**\n * Event plugin that adds Hammer support to an application.\n *\n * @ngModule HammerModule\n */\n@Injectable()\nexport class HammerGesturesPlugin extends EventManagerPlugin {\n  constructor(\n      @Inject(DOCUMENT) doc: any,\n      @Inject(HAMMER_GESTURE_CONFIG) private _config: HammerGestureConfig, private console: Console,\n      @Optional() @Inject(HAMMER_LOADER) private loader?: HammerLoader|null) {\n    super(doc);\n  }\n\n  supports(eventName: string): boolean {\n    if (!EVENT_NAMES.hasOwnProperty(eventName.toLowerCase()) && !this.isCustomEvent(eventName)) {\n      return false;\n    }\n\n    if (!(window as any).Hammer && !this.loader) {\n      this.console.warn(\n          `The \"${eventName}\" event cannot be bound because Hammer.JS is not ` +\n          `loaded and no custom loader has been specified.`);\n      return false;\n    }\n\n    return true;\n  }\n\n  addEventListener(element: HTMLElement, eventName: string, handler: Function): Function {\n    const zone = this.manager.getZone();\n    eventName = eventName.toLowerCase();\n\n    // If Hammer is not present but a loader is specified, we defer adding the event listener\n    // until Hammer is loaded.\n    if (!(window as any).Hammer && this.loader) {\n      // This `addEventListener` method returns a function to remove the added listener.\n      // Until Hammer is loaded, the returned function needs to *cancel* the registration rather\n      // than remove anything.\n      let cancelRegistration = false;\n      let deregister: Function = () => {\n        cancelRegistration = true;\n      };\n\n      this.loader()\n          .then(() => {\n            // If Hammer isn't actually loaded when the custom loader resolves, give up.\n            if (!(window as any).Hammer) {\n              this.console.warn(\n                  `The custom HAMMER_LOADER completed, but Hammer.JS is not present.`);\n              deregister = () => {};\n              return;\n            }\n\n            if (!cancelRegistration) {\n              // Now that Hammer is loaded and the listener is being loaded for real,\n              // the deregistration function changes from canceling registration to removal.\n              deregister = this.addEventListener(element, eventName, handler);\n            }\n          })\n          .catch(() => {\n            this.console.warn(\n                `The \"${eventName}\" event cannot be bound because the custom ` +\n                `Hammer.JS loader failed.`);\n            deregister = () => {};\n          });\n\n      // Return a function that *executes* `deregister` (and not `deregister` itself) so that we\n      // can change the behavior of `deregister` once the listener is added. Using a closure in\n      // this way allows us to avoid any additional data structures to track listener removal.\n      return () => {\n        deregister();\n      };\n    }\n\n    return zone.runOutsideAngular(() => {\n      // Creating the manager bind events, must be done outside of angular\n      const mc = this._config.buildHammer(element);\n      const callback = function(eventObj: HammerInput) {\n        zone.runGuarded(function() {\n          handler(eventObj);\n        });\n      };\n      mc.on(eventName, callback);\n      return () => {\n        mc.off(eventName, callback);\n        // destroy mc to prevent memory leak\n        if (typeof mc.destroy === 'function') {\n          mc.destroy();\n        }\n      };\n    });\n  }\n\n  isCustomEvent(eventName: string): boolean {\n    return this._config.events.indexOf(eventName) > -1;\n  }\n}\n\n/**\n * In Ivy, support for Hammer gestures is optional, so applications must\n * import the `HammerModule` at root to turn on support. This means that\n * Hammer-specific code can be tree-shaken away if not needed.\n */\nexport const HAMMER_PROVIDERS__POST_R3__ = [];\n\n/**\n * In View Engine, support for Hammer gestures is built-in by default.\n */\nexport const HAMMER_PROVIDERS__PRE_R3__: Provider[] = [\n  {\n    provide: EVENT_MANAGER_PLUGINS,\n    useClass: HammerGesturesPlugin,\n    multi: true,\n    deps: [DOCUMENT, HAMMER_GESTURE_CONFIG, Console, [new Optional(), HAMMER_LOADER]]\n  },\n  {provide: HAMMER_GESTURE_CONFIG, useClass: HammerGestureConfig, deps: []},\n];\n\nexport const HAMMER_PROVIDERS = HAMMER_PROVIDERS__PRE_R3__;\n\n/**\n * Adds support for HammerJS.\n *\n * Import this module at the root of your application so that Angular can work with\n * HammerJS to detect gesture events.\n *\n * Note that applications still need to include the HammerJS script itself. This module\n * simply sets up the coordination layer between HammerJS and Angular's EventManager.\n *\n * @publicApi\n */\n@NgModule({providers: HAMMER_PROVIDERS__PRE_R3__})\nexport class HammerModule {\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT, ɵgetDOM as getDOM} from '@angular/common';\nimport {Inject, Injectable, NgZone} from '@angular/core';\nimport {EventManagerPlugin} from './event_manager';\n\n/**\n * Defines supported modifiers for key events.\n */\nconst MODIFIER_KEYS = ['alt', 'control', 'meta', 'shift'];\n\nconst DOM_KEY_LOCATION_NUMPAD = 3;\n\n// Map to convert some key or keyIdentifier values to what will be returned by getEventKey\nconst _keyMap: {[k: string]: string} = {\n  // The following values are here for cross-browser compatibility and to match the W3C standard\n  // cf http://www.w3.org/TR/DOM-Level-3-Events-key/\n  '\\b': 'Backspace',\n  '\\t': 'Tab',\n  '\\x7F': 'Delete',\n  '\\x1B': 'Escape',\n  'Del': 'Delete',\n  'Esc': 'Escape',\n  'Left': 'ArrowLeft',\n  'Right': 'ArrowRight',\n  'Up': 'ArrowUp',\n  'Down': 'ArrowDown',\n  'Menu': 'ContextMenu',\n  'Scroll': 'ScrollLock',\n  'Win': 'OS'\n};\n\n// There is a bug in Chrome for numeric keypad keys:\n// https://code.google.com/p/chromium/issues/detail?id=155654\n// 1, 2, 3 ... are reported as A, B, C ...\nconst _chromeNumKeyPadMap = {\n  'A': '1',\n  'B': '2',\n  'C': '3',\n  'D': '4',\n  'E': '5',\n  'F': '6',\n  'G': '7',\n  'H': '8',\n  'I': '9',\n  'J': '*',\n  'K': '+',\n  'M': '-',\n  'N': '.',\n  'O': '/',\n  '\\x60': '0',\n  '\\x90': 'NumLock'\n};\n\n\n/**\n * Retrieves modifiers from key-event objects.\n */\nconst MODIFIER_KEY_GETTERS: {[key: string]: (event: KeyboardEvent) => boolean} = {\n  'alt': (event: KeyboardEvent) => event.altKey,\n  'control': (event: KeyboardEvent) => event.ctrlKey,\n  'meta': (event: KeyboardEvent) => event.metaKey,\n  'shift': (event: KeyboardEvent) => event.shiftKey\n};\n\n/**\n * @publicApi\n * A browser plug-in that provides support for handling of key events in Angular.\n */\n@Injectable()\nexport class KeyEventsPlugin extends EventManagerPlugin {\n  /**\n   * Initializes an instance of the browser plug-in.\n   * @param doc The document in which key events will be detected.\n   */\n  constructor(@Inject(DOCUMENT) doc: any) {\n    super(doc);\n  }\n\n  /**\n   * Reports whether a named key event is supported.\n   * @param eventName The event name to query.\n   * @return True if the named key event is supported.\n   */\n  supports(eventName: string): boolean {\n    return KeyEventsPlugin.parseEventName(eventName) != null;\n  }\n\n  /**\n   * Registers a handler for a specific element and key event.\n   * @param element The HTML element to receive event notifications.\n   * @param eventName The name of the key event to listen for.\n   * @param handler A function to call when the notification occurs. Receives the\n   * event object as an argument.\n   * @returns The key event that was registered.\n   */\n  addEventListener(element: HTMLElement, eventName: string, handler: Function): Function {\n    const parsedEvent = KeyEventsPlugin.parseEventName(eventName)!;\n\n    const outsideHandler =\n        KeyEventsPlugin.eventCallback(parsedEvent['fullKey'], handler, this.manager.getZone());\n\n    return this.manager.getZone().runOutsideAngular(() => {\n      return getDOM().onAndCancel(element, parsedEvent['domEventName'], outsideHandler);\n    });\n  }\n\n  static parseEventName(eventName: string): {fullKey: string, domEventName: string}|null {\n    const parts: string[] = eventName.toLowerCase().split('.');\n\n    const domEventName = parts.shift();\n    if ((parts.length === 0) || !(domEventName === 'keydown' || domEventName === 'keyup')) {\n      return null;\n    }\n\n    const key = KeyEventsPlugin._normalizeKey(parts.pop()!);\n\n    let fullKey = '';\n    MODIFIER_KEYS.forEach(modifierName => {\n      const index: number = parts.indexOf(modifierName);\n      if (index > -1) {\n        parts.splice(index, 1);\n        fullKey += modifierName + '.';\n      }\n    });\n    fullKey += key;\n\n    if (parts.length != 0 || key.length === 0) {\n      // returning null instead of throwing to let another plugin process the event\n      return null;\n    }\n\n    // NOTE: Please don't rewrite this as so, as it will break JSCompiler property renaming.\n    //       The code must remain in the `result['domEventName']` form.\n    // return {domEventName, fullKey};\n    const result: {fullKey: string, domEventName: string} = {} as any;\n    result['domEventName'] = domEventName;\n    result['fullKey'] = fullKey;\n    return result;\n  }\n\n  static getEventFullKey(event: KeyboardEvent): string {\n    let fullKey = '';\n    let key = getEventKey(event);\n    key = key.toLowerCase();\n    if (key === ' ') {\n      key = 'space';  // for readability\n    } else if (key === '.') {\n      key = 'dot';  // because '.' is used as a separator in event names\n    }\n    MODIFIER_KEYS.forEach(modifierName => {\n      if (modifierName != key) {\n        const modifierGetter = MODIFIER_KEY_GETTERS[modifierName];\n        if (modifierGetter(event)) {\n          fullKey += modifierName + '.';\n        }\n      }\n    });\n    fullKey += key;\n    return fullKey;\n  }\n\n  /**\n   * Configures a handler callback for a key event.\n   * @param fullKey The event name that combines all simultaneous keystrokes.\n   * @param handler The function that responds to the key event.\n   * @param zone The zone in which the event occurred.\n   * @returns A callback function.\n   */\n  static eventCallback(fullKey: any, handler: Function, zone: NgZone): Function {\n    return (event: any /** TODO #9100 */) => {\n      if (KeyEventsPlugin.getEventFullKey(event) === fullKey) {\n        zone.runGuarded(() => handler(event));\n      }\n    };\n  }\n\n  /** @internal */\n  static _normalizeKey(keyName: string): string {\n    // TODO: switch to a Map if the mapping grows too much\n    switch (keyName) {\n      case 'esc':\n        return 'escape';\n      default:\n        return keyName;\n    }\n  }\n}\n\nfunction getEventKey(event: any): string {\n  let key = event.key;\n  if (key == null) {\n    key = event.keyIdentifier;\n    // keyIdentifier is defined in the old draft of DOM Level 3 Events implemented by Chrome and\n    // Safari cf\n    // http://www.w3.org/TR/2007/WD-DOM-Level-3-Events-20071221/events.html#Events-KeyboardEvents-Interfaces\n    if (key == null) {\n      return 'Unidentified';\n    }\n    if (key.startsWith('U+')) {\n      key = String.fromCharCode(parseInt(key.substring(2), 16));\n      if (event.location === DOM_KEY_LOCATION_NUMPAD && _chromeNumKeyPadMap.hasOwnProperty(key)) {\n        // There is a bug in Chrome for numeric keypad keys:\n        // https://code.google.com/p/chromium/issues/detail?id=155654\n        // 1, 2, 3 ... are reported as A, B, C ...\n        key = (_chromeNumKeyPadMap as any)[key];\n      }\n    }\n  }\n\n  return _keyMap[key] || key;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT} from '@angular/common';\nimport {forwardRef, Inject, Injectable, Injector, Sanitizer, SecurityContext, ɵ_sanitizeHtml as _sanitizeHtml, ɵ_sanitizeUrl as _sanitizeUrl, ɵallowSanitizationBypassAndThrow as allowSanitizationBypassOrThrow, ɵbypassSanitizationTrustHtml as bypassSanitizationTrustHtml, ɵbypassSanitizationTrustResourceUrl as bypassSanitizationTrustResourceUrl, ɵbypassSanitizationTrustScript as bypassSanitizationTrustScript, ɵbypassSanitizationTrustStyle as bypassSanitizationTrustStyle, ɵbypassSanitizationTrustUrl as bypassSanitizationTrustUrl, ɵBypassType as BypassType, ɵgetSanitizationBypassType as getSanitizationBypassType, ɵunwrapSafeValue as unwrapSafeValue} from '@angular/core';\n\nexport {SecurityContext};\n\n\n\n/**\n * Marker interface for a value that's safe to use in a particular context.\n *\n * @publicApi\n */\nexport interface SafeValue {}\n\n/**\n * Marker interface for a value that's safe to use as HTML.\n *\n * @publicApi\n */\nexport interface SafeHtml extends SafeValue {}\n\n/**\n * Marker interface for a value that's safe to use as style (CSS).\n *\n * @publicApi\n */\nexport interface SafeStyle extends SafeValue {}\n\n/**\n * Marker interface for a value that's safe to use as JavaScript.\n *\n * @publicApi\n */\nexport interface SafeScript extends SafeValue {}\n\n/**\n * Marker interface for a value that's safe to use as a URL linking to a document.\n *\n * @publicApi\n */\nexport interface SafeUrl extends SafeValue {}\n\n/**\n * Marker interface for a value that's safe to use as a URL to load executable code from.\n *\n * @publicApi\n */\nexport interface SafeResourceUrl extends SafeValue {}\n\n/**\n * DomSanitizer helps preventing Cross Site Scripting Security bugs (XSS) by sanitizing\n * values to be safe to use in the different DOM contexts.\n *\n * For example, when binding a URL in an `<a [href]=\"someValue\">` hyperlink, `someValue` will be\n * sanitized so that an attacker cannot inject e.g. a `javascript:` URL that would execute code on\n * the website.\n *\n * In specific situations, it might be necessary to disable sanitization, for example if the\n * application genuinely needs to produce a `javascript:` style link with a dynamic value in it.\n * Users can bypass security by constructing a value with one of the `bypassSecurityTrust...`\n * methods, and then binding to that value from the template.\n *\n * These situations should be very rare, and extraordinary care must be taken to avoid creating a\n * Cross Site Scripting (XSS) security bug!\n *\n * When using `bypassSecurityTrust...`, make sure to call the method as early as possible and as\n * close as possible to the source of the value, to make it easy to verify no security bug is\n * created by its use.\n *\n * It is not required (and not recommended) to bypass security if the value is safe, e.g. a URL that\n * does not start with a suspicious protocol, or an HTML snippet that does not contain dangerous\n * code. The sanitizer leaves safe values intact.\n *\n * @security Calling any of the `bypassSecurityTrust...` APIs disables Angular's built-in\n * sanitization for the value passed in. Carefully check and audit all values and code paths going\n * into this call. Make sure any user data is appropriately escaped for this security context.\n * For more detail, see the [Security Guide](http://g.co/ng/security).\n *\n * @publicApi\n */\n@Injectable({providedIn: 'root', useExisting: forwardRef(() => DomSanitizerImpl)})\nexport abstract class DomSanitizer implements Sanitizer {\n  /**\n   * Sanitizes a value for use in the given SecurityContext.\n   *\n   * If value is trusted for the context, this method will unwrap the contained safe value and use\n   * it directly. Otherwise, value will be sanitized to be safe in the given context, for example\n   * by replacing URLs that have an unsafe protocol part (such as `javascript:`). The implementation\n   * is responsible to make sure that the value can definitely be safely used in the given context.\n   */\n  abstract sanitize(context: SecurityContext, value: SafeValue|string|null): string|null;\n\n  /**\n   * Bypass security and trust the given value to be safe HTML. Only use this when the bound HTML\n   * is unsafe (e.g. contains `<script>` tags) and the code should be executed. The sanitizer will\n   * leave safe HTML intact, so in most situations this method should not be used.\n   *\n   * **WARNING:** calling this method with untrusted user data exposes your application to XSS\n   * security risks!\n   */\n  abstract bypassSecurityTrustHtml(value: string): SafeHtml;\n\n  /**\n   * Bypass security and trust the given value to be safe style value (CSS).\n   *\n   * **WARNING:** calling this method with untrusted user data exposes your application to XSS\n   * security risks!\n   */\n  abstract bypassSecurityTrustStyle(value: string): SafeStyle;\n\n  /**\n   * Bypass security and trust the given value to be safe JavaScript.\n   *\n   * **WARNING:** calling this method with untrusted user data exposes your application to XSS\n   * security risks!\n   */\n  abstract bypassSecurityTrustScript(value: string): SafeScript;\n\n  /**\n   * Bypass security and trust the given value to be a safe style URL, i.e. a value that can be used\n   * in hyperlinks or `<img src>`.\n   *\n   * **WARNING:** calling this method with untrusted user data exposes your application to XSS\n   * security risks!\n   */\n  abstract bypassSecurityTrustUrl(value: string): SafeUrl;\n\n  /**\n   * Bypass security and trust the given value to be a safe resource URL, i.e. a location that may\n   * be used to load executable code from, like `<script src>`, or `<iframe src>`.\n   *\n   * **WARNING:** calling this method with untrusted user data exposes your application to XSS\n   * security risks!\n   */\n  abstract bypassSecurityTrustResourceUrl(value: string): SafeResourceUrl;\n}\n\nexport function domSanitizerImplFactory(injector: Injector) {\n  return new DomSanitizerImpl(injector.get(DOCUMENT));\n}\n\n@Injectable({providedIn: 'root', useFactory: domSanitizerImplFactory, deps: [Injector]})\nexport class DomSanitizerImpl extends DomSanitizer {\n  constructor(@Inject(DOCUMENT) private _doc: any) {\n    super();\n  }\n\n  sanitize(ctx: SecurityContext, value: SafeValue|string|null): string|null {\n    if (value == null) return null;\n    switch (ctx) {\n      case SecurityContext.NONE:\n        return value as string;\n      case SecurityContext.HTML:\n        if (allowSanitizationBypassOrThrow(value, BypassType.Html)) {\n          return unwrapSafeValue(value);\n        }\n        return _sanitizeHtml(this._doc, String(value));\n      case SecurityContext.STYLE:\n        if (allowSanitizationBypassOrThrow(value, BypassType.Style)) {\n          return unwrapSafeValue(value);\n        }\n        return value as string;\n      case SecurityContext.SCRIPT:\n        if (allowSanitizationBypassOrThrow(value, BypassType.Script)) {\n          return unwrapSafeValue(value);\n        }\n        throw new Error('unsafe value used in a script context');\n      case SecurityContext.URL:\n        const type = getSanitizationBypassType(value);\n        if (allowSanitizationBypassOrThrow(value, BypassType.Url)) {\n          return unwrapSafeValue(value);\n        }\n        return _sanitizeUrl(String(value));\n      case SecurityContext.RESOURCE_URL:\n        if (allowSanitizationBypassOrThrow(value, BypassType.ResourceUrl)) {\n          return unwrapSafeValue(value);\n        }\n        throw new Error(\n            'unsafe value used in a resource URL context (see http://g.co/ng/security#xss)');\n      default:\n        throw new Error(`Unexpected SecurityContext ${ctx} (see http://g.co/ng/security#xss)`);\n    }\n  }\n\n  bypassSecurityTrustHtml(value: string): SafeHtml {\n    return bypassSanitizationTrustHtml(value);\n  }\n  bypassSecurityTrustStyle(value: string): SafeStyle {\n    return bypassSanitizationTrustStyle(value);\n  }\n  bypassSecurityTrustScript(value: string): SafeScript {\n    return bypassSanitizationTrustScript(value);\n  }\n  bypassSecurityTrustUrl(value: string): SafeUrl {\n    return bypassSanitizationTrustUrl(value);\n  }\n  bypassSecurityTrustResourceUrl(value: string): SafeResourceUrl {\n    return bypassSanitizationTrustResourceUrl(value);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {CommonModule, DOCUMENT, ɵPLATFORM_BROWSER_ID as PLATFORM_BROWSER_ID} from '@angular/common';\nimport {APP_ID, ApplicationModule, createPlatformFactory, ErrorHandler, Inject, ModuleWithProviders, NgModule, NgZone, Optional, PLATFORM_ID, PLATFORM_INITIALIZER, platformCore, PlatformRef, RendererFactory2, Sanitizer, SkipSelf, StaticProvider, Testability, ɵConsole as Console, ɵINJECTOR_SCOPE as INJECTOR_SCOPE, ɵsetDocument} from '@angular/core';\n\nimport {BrowserDomAdapter} from './browser/browser_adapter';\nimport {SERVER_TRANSITION_PROVIDERS, TRANSITION_ID} from './browser/server-transition';\nimport {BrowserGetTestability} from './browser/testability';\nimport {ELEMENT_PROBE_PROVIDERS} from './dom/debug/ng_probe';\nimport {DomRendererFactory2} from './dom/dom_renderer';\nimport {DomEventsPlugin} from './dom/events/dom_events';\nimport {EVENT_MANAGER_PLUGINS, EventManager} from './dom/events/event_manager';\nimport {HAMMER_PROVIDERS} from './dom/events/hammer_gestures';\nimport {KeyEventsPlugin} from './dom/events/key_events';\nimport {DomSharedStylesHost, SharedStylesHost} from './dom/shared_styles_host';\nimport {DomSanitizer, DomSanitizerImpl} from './security/dom_sanitization_service';\n\nexport function initDomAdapter() {\n  BrowserDomAdapter.makeCurrent();\n  BrowserGetTestability.init();\n}\n\nexport function errorHandler(): ErrorHandler {\n  return new ErrorHandler();\n}\n\nexport function _document(): any {\n  // Tell ivy about the global document\n  ɵsetDocument(document);\n  return document;\n}\n\nexport const INTERNAL_BROWSER_PLATFORM_PROVIDERS: StaticProvider[] = [\n  {provide: PLATFORM_ID, useValue: PLATFORM_BROWSER_ID},\n  {provide: PLATFORM_INITIALIZER, useValue: initDomAdapter, multi: true},\n  {provide: DOCUMENT, useFactory: _document, deps: []},\n];\n\nconst BROWSER_SANITIZATION_PROVIDERS__PRE_R3__: StaticProvider[] = [\n  {provide: Sanitizer, useExisting: DomSanitizer},\n  {provide: DomSanitizer, useClass: DomSanitizerImpl, deps: [DOCUMENT]},\n];\n\nexport const BROWSER_SANITIZATION_PROVIDERS__POST_R3__ = [];\n\n/**\n * @security Replacing built-in sanitization providers exposes the application to XSS risks.\n * Attacker-controlled data introduced by an unsanitized provider could expose your\n * application to XSS risks. For more detail, see the [Security Guide](http://g.co/ng/security).\n * @publicApi\n */\nexport const BROWSER_SANITIZATION_PROVIDERS = BROWSER_SANITIZATION_PROVIDERS__PRE_R3__;\n\n/**\n * A factory function that returns a `PlatformRef` instance associated with browser service\n * providers.\n *\n * @publicApi\n */\nexport const platformBrowser: (extraProviders?: StaticProvider[]) => PlatformRef =\n    createPlatformFactory(platformCore, 'browser', INTERNAL_BROWSER_PLATFORM_PROVIDERS);\n\nexport const BROWSER_MODULE_PROVIDERS: StaticProvider[] = [\n  BROWSER_SANITIZATION_PROVIDERS,\n  {provide: INJECTOR_SCOPE, useValue: 'root'},\n  {provide: ErrorHandler, useFactory: errorHandler, deps: []},\n  {\n    provide: EVENT_MANAGER_PLUGINS,\n    useClass: DomEventsPlugin,\n    multi: true,\n    deps: [DOCUMENT, NgZone, PLATFORM_ID]\n  },\n  {provide: EVENT_MANAGER_PLUGINS, useClass: KeyEventsPlugin, multi: true, deps: [DOCUMENT]},\n  HAMMER_PROVIDERS,\n  {\n    provide: DomRendererFactory2,\n    useClass: DomRendererFactory2,\n    deps: [EventManager, DomSharedStylesHost, APP_ID]\n  },\n  {provide: RendererFactory2, useExisting: DomRendererFactory2},\n  {provide: SharedStylesHost, useExisting: DomSharedStylesHost},\n  {provide: DomSharedStylesHost, useClass: DomSharedStylesHost, deps: [DOCUMENT]},\n  {provide: Testability, useClass: Testability, deps: [NgZone]},\n  {provide: EventManager, useClass: EventManager, deps: [EVENT_MANAGER_PLUGINS, NgZone]},\n  ELEMENT_PROBE_PROVIDERS,\n];\n\n/**\n * Exports required infrastructure for all Angular apps.\n * Included by default in all Angular apps created with the CLI\n * `new` command.\n * Re-exports `CommonModule` and `ApplicationModule`, making their\n * exports and providers available to all apps.\n *\n * @publicApi\n */\n@NgModule({providers: BROWSER_MODULE_PROVIDERS, exports: [CommonModule, ApplicationModule]})\nexport class BrowserModule {\n  constructor(@Optional() @SkipSelf() @Inject(BrowserModule) parentModule: BrowserModule|null) {\n    if (parentModule) {\n      throw new Error(\n          `BrowserModule has already been loaded. If you need access to common directives such as NgIf and NgFor from a lazy loaded module, import CommonModule instead.`);\n    }\n  }\n\n  /**\n   * Configures a browser-based app to transition from a server-rendered app, if\n   * one is present on the page.\n   *\n   * @param params An object containing an identifier for the app to transition.\n   * The ID must match between the client and server versions of the app.\n   * @returns The reconfigured `BrowserModule` to import into the app's root `AppModule`.\n   */\n  static withServerTransition(params: {appId: string}): ModuleWithProviders<BrowserModule> {\n    return {\n      ngModule: BrowserModule,\n      providers: [\n        {provide: APP_ID, useValue: params.appId},\n        {provide: TRANSITION_ID, useExisting: APP_ID},\n        SERVER_TRANSITION_PROVIDERS,\n      ],\n    };\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT, ɵDomAdapter as DomAdapter, ɵgetDOM as getDOM} from '@angular/common';\nimport {Inject, Injectable, ɵɵinject} from '@angular/core';\n\n/**\n * Represents the attributes of an HTML `<meta>` element. The element itself is\n * represented by the internal `HTMLMetaElement`.\n *\n * @see [HTML meta tag](https://developer.mozilla.org/docs/Web/HTML/Element/meta)\n * @see `Meta`\n *\n * @publicApi\n */\nexport type MetaDefinition = {\n  charset?: string;\n  content?: string;\n  httpEquiv?: string;\n  id?: string;\n  itemprop?: string;\n  name?: string;\n  property?: string;\n  scheme?: string;\n  url?: string;\n}&{\n  // TODO(IgorMinar): this type looks wrong\n  [prop: string]: string;\n};\n\n/**\n * Factory to create a `Meta` service instance for the current DOM document.\n */\nexport function createMeta() {\n  return new Meta(ɵɵinject(DOCUMENT));\n}\n\n/**\n * A service for managing HTML `<meta>` tags.\n *\n * Properties of the `MetaDefinition` object match the attributes of the\n * HTML `<meta>` tag. These tags define document metadata that is important for\n * things like configuring a Content Security Policy, defining browser compatibility\n * and security settings, setting HTTP Headers, defining rich content for social sharing,\n * and Search Engine Optimization (SEO).\n *\n * To identify specific `<meta>` tags in a document, use an attribute selection\n * string in the format `\"tag_attribute='value string'\"`.\n * For example, an `attrSelector` value of `\"name='description'\"` matches a tag\n * whose `name` attribute has the value `\"description\"`.\n * Selectors are used with the `querySelector()` Document method,\n * in the format `meta[{attrSelector}]`.\n *\n * @see [HTML meta tag](https://developer.mozilla.org/docs/Web/HTML/Element/meta)\n * @see [Document.querySelector()](https://developer.mozilla.org/docs/Web/API/Document/querySelector)\n *\n *\n * @publicApi\n */\n@Injectable({providedIn: 'root', useFactory: createMeta, deps: []})\nexport class Meta {\n  private _dom: DomAdapter;\n  constructor(@Inject(DOCUMENT) private _doc: any) {\n    this._dom = getDOM();\n  }\n  /**\n   * Retrieves or creates a specific `<meta>` tag element in the current HTML document.\n   * In searching for an existing tag, Angular attempts to match the `name` or `property` attribute\n   * values in the provided tag definition, and verifies that all other attribute values are equal.\n   * If an existing element is found, it is returned and is not modified in any way.\n   * @param tag The definition of a `<meta>` element to match or create.\n   * @param forceCreation True to create a new element without checking whether one already exists.\n   * @returns The existing element with the same attributes and values if found,\n   * the new element if no match is found, or `null` if the tag parameter is not defined.\n   */\n  addTag(tag: MetaDefinition, forceCreation: boolean = false): HTMLMetaElement|null {\n    if (!tag) return null;\n    return this._getOrCreateElement(tag, forceCreation);\n  }\n\n  /**\n   * Retrieves or creates a set of `<meta>` tag elements in the current HTML document.\n   * In searching for an existing tag, Angular attempts to match the `name` or `property` attribute\n   * values in the provided tag definition, and verifies that all other attribute values are equal.\n   * @param tags An array of tag definitions to match or create.\n   * @param forceCreation True to create new elements without checking whether they already exist.\n   * @returns The matching elements if found, or the new elements.\n   */\n  addTags(tags: MetaDefinition[], forceCreation: boolean = false): HTMLMetaElement[] {\n    if (!tags) return [];\n    return tags.reduce((result: HTMLMetaElement[], tag: MetaDefinition) => {\n      if (tag) {\n        result.push(this._getOrCreateElement(tag, forceCreation));\n      }\n      return result;\n    }, []);\n  }\n\n  /**\n   * Retrieves a `<meta>` tag element in the current HTML document.\n   * @param attrSelector The tag attribute and value to match against, in the format\n   * `\"tag_attribute='value string'\"`.\n   * @returns The matching element, if any.\n   */\n  getTag(attrSelector: string): HTMLMetaElement|null {\n    if (!attrSelector) return null;\n    return this._doc.querySelector(`meta[${attrSelector}]`) || null;\n  }\n\n  /**\n   * Retrieves a set of `<meta>` tag elements in the current HTML document.\n   * @param attrSelector The tag attribute and value to match against, in the format\n   * `\"tag_attribute='value string'\"`.\n   * @returns The matching elements, if any.\n   */\n  getTags(attrSelector: string): HTMLMetaElement[] {\n    if (!attrSelector) return [];\n    const list /*NodeList*/ = this._doc.querySelectorAll(`meta[${attrSelector}]`);\n    return list ? [].slice.call(list) : [];\n  }\n\n  /**\n   * Modifies an existing `<meta>` tag element in the current HTML document.\n   * @param tag The tag description with which to replace the existing tag content.\n   * @param selector A tag attribute and value to match against, to identify\n   * an existing tag. A string in the format `\"tag_attribute=`value string`\"`.\n   * If not supplied, matches a tag with the same `name` or `property` attribute value as the\n   * replacement tag.\n   * @return The modified element.\n   */\n  updateTag(tag: MetaDefinition, selector?: string): HTMLMetaElement|null {\n    if (!tag) return null;\n    selector = selector || this._parseSelector(tag);\n    const meta: HTMLMetaElement = this.getTag(selector)!;\n    if (meta) {\n      return this._setMetaElementAttributes(tag, meta);\n    }\n    return this._getOrCreateElement(tag, true);\n  }\n\n  /**\n   * Removes an existing `<meta>` tag element from the current HTML document.\n   * @param attrSelector A tag attribute and value to match against, to identify\n   * an existing tag. A string in the format `\"tag_attribute=`value string`\"`.\n   */\n  removeTag(attrSelector: string): void {\n    this.removeTagElement(this.getTag(attrSelector)!);\n  }\n\n  /**\n   * Removes an existing `<meta>` tag element from the current HTML document.\n   * @param meta The tag definition to match against to identify an existing tag.\n   */\n  removeTagElement(meta: HTMLMetaElement): void {\n    if (meta) {\n      this._dom.remove(meta);\n    }\n  }\n\n  private _getOrCreateElement(meta: MetaDefinition, forceCreation: boolean = false):\n      HTMLMetaElement {\n    if (!forceCreation) {\n      const selector: string = this._parseSelector(meta);\n      const elem: HTMLMetaElement = this.getTag(selector)!;\n      // It's allowed to have multiple elements with the same name so it's not enough to\n      // just check that element with the same name already present on the page. We also need to\n      // check if element has tag attributes\n      if (elem && this._containsAttributes(meta, elem)) return elem;\n    }\n    const element: HTMLMetaElement = this._dom.createElement('meta') as HTMLMetaElement;\n    this._setMetaElementAttributes(meta, element);\n    const head = this._doc.getElementsByTagName('head')[0];\n    head.appendChild(element);\n    return element;\n  }\n\n  private _setMetaElementAttributes(tag: MetaDefinition, el: HTMLMetaElement): HTMLMetaElement {\n    Object.keys(tag).forEach((prop: string) => el.setAttribute(prop, tag[prop]));\n    return el;\n  }\n\n  private _parseSelector(tag: MetaDefinition): string {\n    const attr: string = tag.name ? 'name' : 'property';\n    return `${attr}=\"${tag[attr]}\"`;\n  }\n\n  private _containsAttributes(tag: MetaDefinition, elem: HTMLMetaElement): boolean {\n    return Object.keys(tag).every((key: string) => elem.getAttribute(key) === tag[key]);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT, ɵgetDOM as getDOM} from '@angular/common';\nimport {Inject, Injectable, ɵɵinject} from '@angular/core';\n\n\n/**\n * Factory to create Title service.\n */\nexport function createTitle() {\n  return new Title(ɵɵinject(DOCUMENT));\n}\n\n/**\n * A service that can be used to get and set the title of a current HTML document.\n *\n * Since an Angular application can't be bootstrapped on the entire HTML document (`<html>` tag)\n * it is not possible to bind to the `text` property of the `HTMLTitleElement` elements\n * (representing the `<title>` tag). Instead, this service can be used to set and get the current\n * title value.\n *\n * @publicApi\n */\n@Injectable({providedIn: 'root', useFactory: createTitle, deps: []})\nexport class Title {\n  constructor(@Inject(DOCUMENT) private _doc: any) {}\n  /**\n   * Get the title of the current HTML document.\n   */\n  getTitle(): string {\n    return this._doc.title;\n  }\n\n  /**\n   * Set the title of the current HTML document.\n   * @param newTitle\n   */\n  setTitle(newTitle: string) {\n    this._doc.title = newTitle || '';\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nconst win = typeof window !== 'undefined' && window || <any>{};\nexport {win as window};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ɵgetDOM as getDOM} from '@angular/common';\nimport {ApplicationRef, ComponentRef} from '@angular/core';\nimport {window} from './browser';\n\nexport class ChangeDetectionPerfRecord {\n  constructor(public msPerTick: number, public numTicks: number) {}\n}\n\n/**\n * Entry point for all Angular profiling-related debug tools. This object\n * corresponds to the `ng.profiler` in the dev console.\n */\nexport class AngularProfiler {\n  appRef: ApplicationRef;\n\n  constructor(ref: ComponentRef<any>) {\n    this.appRef = ref.injector.get(ApplicationRef);\n  }\n\n  // tslint:disable:no-console\n  /**\n   * Exercises change detection in a loop and then prints the average amount of\n   * time in milliseconds how long a single round of change detection takes for\n   * the current state of the UI. It runs a minimum of 5 rounds for a minimum\n   * of 500 milliseconds.\n   *\n   * Optionally, a user may pass a `config` parameter containing a map of\n   * options. Supported options are:\n   *\n   * `record` (boolean) - causes the profiler to record a CPU profile while\n   * it exercises the change detector. Example:\n   *\n   * ```\n   * ng.profiler.timeChangeDetection({record: true})\n   * ```\n   */\n  timeChangeDetection(config: any): ChangeDetectionPerfRecord {\n    const record = config && config['record'];\n    const profileName = 'Change Detection';\n    // Profiler is not available in Android browsers, nor in IE 9 without dev tools opened\n    const isProfilerAvailable = window.console.profile != null;\n    if (record && isProfilerAvailable) {\n      window.console.profile(profileName);\n    }\n    const start = getDOM().performanceNow();\n    let numTicks = 0;\n    while (numTicks < 5 || (getDOM().performanceNow() - start) < 500) {\n      this.appRef.tick();\n      numTicks++;\n    }\n    const end = getDOM().performanceNow();\n    if (record && isProfilerAvailable) {\n      window.console.profileEnd(profileName);\n    }\n    const msPerTick = (end - start) / numTicks;\n    window.console.log(`ran ${numTicks} change detection cycles`);\n    window.console.log(`${msPerTick.toFixed(2)} ms per check`);\n\n    return new ChangeDetectionPerfRecord(msPerTick, numTicks);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ComponentRef} from '@angular/core';\nimport {exportNgVar} from '../../dom/util';\nimport {AngularProfiler} from './common_tools';\n\nconst PROFILER_GLOBAL_NAME = 'profiler';\n\n/**\n * Enabled Angular debug tools that are accessible via your browser's\n * developer console.\n *\n * Usage:\n *\n * 1. Open developer console (e.g. in Chrome Ctrl + Shift + j)\n * 1. Type `ng.` (usually the console will show auto-complete suggestion)\n * 1. Try the change detection profiler `ng.profiler.timeChangeDetection()`\n *    then hit Enter.\n *\n * @publicApi\n */\nexport function enableDebugTools<T>(ref: ComponentRef<T>): ComponentRef<T> {\n  exportNgVar(PROFILER_GLOBAL_NAME, new AngularProfiler(ref));\n  return ref;\n}\n\n/**\n * Disables Angular tools.\n *\n * @publicApi\n */\nexport function disableDebugTools(): void {\n  exportNgVar(PROFILER_GLOBAL_NAME, null);\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT} from '@angular/common';\nimport {APP_ID, Injectable, NgModule} from '@angular/core';\n\nexport function escapeHtml(text: string): string {\n  const escapedText: {[k: string]: string} = {\n    '&': '&a;',\n    '\"': '&q;',\n    '\\'': '&s;',\n    '<': '&l;',\n    '>': '&g;',\n  };\n  return text.replace(/[&\"'<>]/g, s => escapedText[s]);\n}\n\nexport function unescapeHtml(text: string): string {\n  const unescapedText: {[k: string]: string} = {\n    '&a;': '&',\n    '&q;': '\"',\n    '&s;': '\\'',\n    '&l;': '<',\n    '&g;': '>',\n  };\n  return text.replace(/&[^;]+;/g, s => unescapedText[s]);\n}\n\n/**\n * A type-safe key to use with `TransferState`.\n *\n * Example:\n *\n * ```\n * const COUNTER_KEY = makeStateKey<number>('counter');\n * let value = 10;\n *\n * transferState.set(COUNTER_KEY, value);\n * ```\n *\n * @publicApi\n */\nexport type StateKey<T> = string&{__not_a_string: never};\n\n/**\n * Create a `StateKey<T>` that can be used to store value of type T with `TransferState`.\n *\n * Example:\n *\n * ```\n * const COUNTER_KEY = makeStateKey<number>('counter');\n * let value = 10;\n *\n * transferState.set(COUNTER_KEY, value);\n * ```\n *\n * @publicApi\n */\nexport function makeStateKey<T = void>(key: string): StateKey<T> {\n  return key as StateKey<T>;\n}\n\n/**\n * A key value store that is transferred from the application on the server side to the application\n * on the client side.\n *\n * `TransferState` will be available as an injectable token. To use it import\n * `ServerTransferStateModule` on the server and `BrowserTransferStateModule` on the client.\n *\n * The values in the store are serialized/deserialized using JSON.stringify/JSON.parse. So only\n * boolean, number, string, null and non-class objects will be serialized and deserialzied in a\n * non-lossy manner.\n *\n * @publicApi\n */\n@Injectable()\nexport class TransferState {\n  private store: {[k: string]: {}|undefined} = {};\n  private onSerializeCallbacks: {[k: string]: () => {} | undefined} = {};\n\n  /** @internal */\n  static init(initState: {}) {\n    const transferState = new TransferState();\n    transferState.store = initState;\n    return transferState;\n  }\n\n  /**\n   * Get the value corresponding to a key. Return `defaultValue` if key is not found.\n   */\n  get<T>(key: StateKey<T>, defaultValue: T): T {\n    return this.store[key] !== undefined ? this.store[key] as T : defaultValue;\n  }\n\n  /**\n   * Set the value corresponding to a key.\n   */\n  set<T>(key: StateKey<T>, value: T): void {\n    this.store[key] = value;\n  }\n\n  /**\n   * Remove a key from the store.\n   */\n  remove<T>(key: StateKey<T>): void {\n    delete this.store[key];\n  }\n\n  /**\n   * Test whether a key exists in the store.\n   */\n  hasKey<T>(key: StateKey<T>) {\n    return this.store.hasOwnProperty(key);\n  }\n\n  /**\n   * Register a callback to provide the value for a key when `toJson` is called.\n   */\n  onSerialize<T>(key: StateKey<T>, callback: () => T): void {\n    this.onSerializeCallbacks[key] = callback;\n  }\n\n  /**\n   * Serialize the current state of the store to JSON.\n   */\n  toJson(): string {\n    // Call the onSerialize callbacks and put those values into the store.\n    for (const key in this.onSerializeCallbacks) {\n      if (this.onSerializeCallbacks.hasOwnProperty(key)) {\n        try {\n          this.store[key] = this.onSerializeCallbacks[key]();\n        } catch (e) {\n          console.warn('Exception in onSerialize callback: ', e);\n        }\n      }\n    }\n    return JSON.stringify(this.store);\n  }\n}\n\nexport function initTransferState(doc: Document, appId: string) {\n  // Locate the script tag with the JSON data transferred from the server.\n  // The id of the script tag is set to the Angular appId + 'state'.\n  const script = doc.getElementById(appId + '-state');\n  let initialState = {};\n  if (script && script.textContent) {\n    try {\n      initialState = JSON.parse(unescapeHtml(script.textContent));\n    } catch (e) {\n      console.warn('Exception while restoring TransferState for app ' + appId, e);\n    }\n  }\n  return TransferState.init(initialState);\n}\n\n/**\n * NgModule to install on the client side while using the `TransferState` to transfer state from\n * server to client.\n *\n * @publicApi\n */\n@NgModule({\n  providers: [{provide: TransferState, useFactory: initTransferState, deps: [DOCUMENT, APP_ID]}],\n})\nexport class BrowserTransferStateModule {\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ɵgetDOM as getDOM} from '@angular/common';\nimport {DebugElement, DebugNode, Predicate, Type} from '@angular/core';\n\n\n\n/**\n * Predicates for use with {@link DebugElement}'s query functions.\n *\n * @publicApi\n */\nexport class By {\n  /**\n   * Match all nodes.\n   *\n   * @usageNotes\n   * ### Example\n   *\n   * {@example platform-browser/dom/debug/ts/by/by.ts region='by_all'}\n   */\n  static all(): Predicate<DebugNode> {\n    return () => true;\n  }\n\n  /**\n   * Match elements by the given CSS selector.\n   *\n   * @usageNotes\n   * ### Example\n   *\n   * {@example platform-browser/dom/debug/ts/by/by.ts region='by_css'}\n   */\n  static css(selector: string): Predicate<DebugElement> {\n    return (debugElement) => {\n      return debugElement.nativeElement != null ?\n          elementMatches(debugElement.nativeElement, selector) :\n          false;\n    };\n  }\n\n  /**\n   * Match nodes that have the given directive present.\n   *\n   * @usageNotes\n   * ### Example\n   *\n   * {@example platform-browser/dom/debug/ts/by/by.ts region='by_directive'}\n   */\n  static directive(type: Type<any>): Predicate<DebugNode> {\n    return (debugNode) => debugNode.providerTokens!.indexOf(type) !== -1;\n  }\n}\n\nfunction elementMatches(n: any, selector: string): boolean {\n  if (getDOM().isElementNode(n)) {\n    return n.matches && n.matches(selector) ||\n        n.msMatchesSelector && n.msMatchesSelector(selector) ||\n        n.webkitMatchesSelector && n.webkitMatchesSelector(selector);\n  }\n\n  return false;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport {ɵgetDOM} from '@angular/common';\nexport {BROWSER_SANITIZATION_PROVIDERS as ɵBROWSER_SANITIZATION_PROVIDERS, BROWSER_SANITIZATION_PROVIDERS__POST_R3__ as ɵBROWSER_SANITIZATION_PROVIDERS__POST_R3__, initDomAdapter as ɵinitDomAdapter, INTERNAL_BROWSER_PLATFORM_PROVIDERS as ɵINTERNAL_BROWSER_PLATFORM_PROVIDERS} from './browser';\nexport {BrowserDomAdapter as ɵBrowserDomAdapter} from './browser/browser_adapter';\nexport {TRANSITION_ID as ɵTRANSITION_ID} from './browser/server-transition';\nexport {BrowserGetTestability as ɵBrowserGetTestability} from './browser/testability';\nexport {escapeHtml as ɵescapeHtml} from './browser/transfer_state';\nexport {ELEMENT_PROBE_PROVIDERS as ɵELEMENT_PROBE_PROVIDERS} from './dom/debug/ng_probe';\nexport {DomRendererFactory2 as ɵDomRendererFactory2, flattenStyles as ɵflattenStyles, NAMESPACE_URIS as ɵNAMESPACE_URIS, shimContentAttribute as ɵshimContentAttribute, shimHostAttribute as ɵshimHostAttribute} from './dom/dom_renderer';\nexport {DomEventsPlugin as ɵDomEventsPlugin} from './dom/events/dom_events';\nexport {HammerGesturesPlugin as ɵHammerGesturesPlugin} from './dom/events/hammer_gestures';\nexport {KeyEventsPlugin as ɵKeyEventsPlugin} from './dom/events/key_events';\nexport {DomSharedStylesHost as ɵDomSharedStylesHost, SharedStylesHost as ɵSharedStylesHost} from './dom/shared_styles_host';\nexport {DomSanitizerImpl as ɵDomSanitizerImpl} from './security/dom_sanitization_service';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @module\n * @description\n * Entry point for all public APIs of the common package.\n */\n\nimport {Version} from '@angular/core';\n\n/**\n * @publicApi\n */\nexport const VERSION = new Version('10.1.3');\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @module\n * @description\n * Entry point for all public APIs of this package.\n */\nexport * from './src/platform-browser';\n// This file only reexports content of the `src` folder. Keep it that way.\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n// This file is not used to build this module. It is only used during editing\n// by the TypeScript language service and during build for verification. `ngc`\n// replaces this file with production index.ts when it rewrites private symbol\n// names.\n\nexport * from './public_api';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './index';\n\nexport {BROWSER_MODULE_PROVIDERS as ɵangular_packages_platform_browser_platform_browser_c,_document as ɵangular_packages_platform_browser_platform_browser_b,errorHandler as ɵangular_packages_platform_browser_platform_browser_a} from './src/browser';\nexport {GenericBrowserDomAdapter as ɵangular_packages_platform_browser_platform_browser_o} from './src/browser/generic_browser_adapter';\nexport {createMeta as ɵangular_packages_platform_browser_platform_browser_d} from './src/browser/meta';\nexport {SERVER_TRANSITION_PROVIDERS as ɵangular_packages_platform_browser_platform_browser_l,appInitializerFactory as ɵangular_packages_platform_browser_platform_browser_k} from './src/browser/server-transition';\nexport {createTitle as ɵangular_packages_platform_browser_platform_browser_e} from './src/browser/title';\nexport {initTransferState as ɵangular_packages_platform_browser_platform_browser_f} from './src/browser/transfer_state';\nexport {ELEMENT_PROBE_PROVIDERS__PRE_R3__ as ɵangular_packages_platform_browser_platform_browser_n,_createNgProbeR2 as ɵangular_packages_platform_browser_platform_browser_m} from './src/dom/debug/ng_probe';\nexport {EventManagerPlugin as ɵangular_packages_platform_browser_platform_browser_g} from './src/dom/events/event_manager';\nexport {HAMMER_PROVIDERS as ɵangular_packages_platform_browser_platform_browser_i,HAMMER_PROVIDERS__PRE_R3__ as ɵangular_packages_platform_browser_platform_browser_h} from './src/dom/events/hammer_gestures';\nexport {domSanitizerImplFactory as ɵangular_packages_platform_browser_platform_browser_j} from './src/security/dom_sanitization_service';","import { Subject } from './Subject';\nimport { queue } from './scheduler/queue';\nimport { Subscription } from './Subscription';\nimport { ObserveOnSubscriber } from './operators/observeOn';\nimport { ObjectUnsubscribedError } from './util/ObjectUnsubscribedError';\nimport { SubjectSubscription } from './SubjectSubscription';\nexport class ReplaySubject extends Subject {\n    constructor(bufferSize = Number.POSITIVE_INFINITY, windowTime = Number.POSITIVE_INFINITY, scheduler) {\n        super();\n        this.scheduler = scheduler;\n        this._events = [];\n        this._infiniteTimeWindow = false;\n        this._bufferSize = bufferSize < 1 ? 1 : bufferSize;\n        this._windowTime = windowTime < 1 ? 1 : windowTime;\n        if (windowTime === Number.POSITIVE_INFINITY) {\n            this._infiniteTimeWindow = true;\n            this.next = this.nextInfiniteTimeWindow;\n        }\n        else {\n            this.next = this.nextTimeWindow;\n        }\n    }\n    nextInfiniteTimeWindow(value) {\n        if (!this.isStopped) {\n            const _events = this._events;\n            _events.push(value);\n            if (_events.length > this._bufferSize) {\n                _events.shift();\n            }\n        }\n        super.next(value);\n    }\n    nextTimeWindow(value) {\n        if (!this.isStopped) {\n            this._events.push(new ReplayEvent(this._getNow(), value));\n            this._trimBufferThenGetEvents();\n        }\n        super.next(value);\n    }\n    _subscribe(subscriber) {\n        const _infiniteTimeWindow = this._infiniteTimeWindow;\n        const _events = _infiniteTimeWindow ? this._events : this._trimBufferThenGetEvents();\n        const scheduler = this.scheduler;\n        const len = _events.length;\n        let subscription;\n        if (this.closed) {\n            throw new ObjectUnsubscribedError();\n        }\n        else if (this.isStopped || this.hasError) {\n            subscription = Subscription.EMPTY;\n        }\n        else {\n            this.observers.push(subscriber);\n            subscription = new SubjectSubscription(this, subscriber);\n        }\n        if (scheduler) {\n            subscriber.add(subscriber = new ObserveOnSubscriber(subscriber, scheduler));\n        }\n        if (_infiniteTimeWindow) {\n            for (let i = 0; i < len && !subscriber.closed; i++) {\n                subscriber.next(_events[i]);\n            }\n        }\n        else {\n            for (let i = 0; i < len && !subscriber.closed; i++) {\n                subscriber.next(_events[i].value);\n            }\n        }\n        if (this.hasError) {\n            subscriber.error(this.thrownError);\n        }\n        else if (this.isStopped) {\n            subscriber.complete();\n        }\n        return subscription;\n    }\n    _getNow() {\n        return (this.scheduler || queue).now();\n    }\n    _trimBufferThenGetEvents() {\n        const now = this._getNow();\n        const _bufferSize = this._bufferSize;\n        const _windowTime = this._windowTime;\n        const _events = this._events;\n        const eventsCount = _events.length;\n        let spliceCount = 0;\n        while (spliceCount < eventsCount) {\n            if ((now - _events[spliceCount].time) < _windowTime) {\n                break;\n            }\n            spliceCount++;\n        }\n        if (eventsCount > _bufferSize) {\n            spliceCount = Math.max(spliceCount, eventsCount - _bufferSize);\n        }\n        if (spliceCount > 0) {\n            _events.splice(0, spliceCount);\n        }\n        return _events;\n    }\n}\nclass ReplayEvent {\n    constructor(time, value) {\n        this.time = time;\n        this.value = value;\n    }\n}\n//# sourceMappingURL=ReplaySubject.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/* tslint:enable:max-line-length */\n/**\n * Returns a ConnectableObservable, which is a variety of Observable that waits until its connect method is called\n * before it begins emitting items to those Observers that have subscribed to it.\n *\n * <img src=\"./img/publish.png\" width=\"100%\">\n *\n * @param {Function} [selector] - Optional selector function which can use the multicasted source sequence as many times\n * as needed, without causing multiple subscriptions to the source sequence.\n * Subscribers to the given source will receive all notifications of the source from the time of the subscription on.\n * @return A ConnectableObservable that upon connection causes the source Observable to emit items to its Observers.\n * @method publish\n * @owner Observable\n */\nfunction publish(selector) {\n    return operators_1.publish(selector)(this);\n}\nexports.publish = publish;\n//# sourceMappingURL=publish.js.map","export const observable = (() => typeof Symbol === 'function' && Symbol.observable || '@@observable')();\n//# sourceMappingURL=observable.js.map","export { audit } from '../internal/operators/audit';\nexport { auditTime } from '../internal/operators/auditTime';\nexport { buffer } from '../internal/operators/buffer';\nexport { bufferCount } from '../internal/operators/bufferCount';\nexport { bufferTime } from '../internal/operators/bufferTime';\nexport { bufferToggle } from '../internal/operators/bufferToggle';\nexport { bufferWhen } from '../internal/operators/bufferWhen';\nexport { catchError } from '../internal/operators/catchError';\nexport { combineAll } from '../internal/operators/combineAll';\nexport { combineLatest } from '../internal/operators/combineLatest';\nexport { concat } from '../internal/operators/concat';\nexport { concatAll } from '../internal/operators/concatAll';\nexport { concatMap } from '../internal/operators/concatMap';\nexport { concatMapTo } from '../internal/operators/concatMapTo';\nexport { count } from '../internal/operators/count';\nexport { debounce } from '../internal/operators/debounce';\nexport { debounceTime } from '../internal/operators/debounceTime';\nexport { defaultIfEmpty } from '../internal/operators/defaultIfEmpty';\nexport { delay } from '../internal/operators/delay';\nexport { delayWhen } from '../internal/operators/delayWhen';\nexport { dematerialize } from '../internal/operators/dematerialize';\nexport { distinct } from '../internal/operators/distinct';\nexport { distinctUntilChanged } from '../internal/operators/distinctUntilChanged';\nexport { distinctUntilKeyChanged } from '../internal/operators/distinctUntilKeyChanged';\nexport { elementAt } from '../internal/operators/elementAt';\nexport { endWith } from '../internal/operators/endWith';\nexport { every } from '../internal/operators/every';\nexport { exhaust } from '../internal/operators/exhaust';\nexport { exhaustMap } from '../internal/operators/exhaustMap';\nexport { expand } from '../internal/operators/expand';\nexport { filter } from '../internal/operators/filter';\nexport { finalize } from '../internal/operators/finalize';\nexport { find } from '../internal/operators/find';\nexport { findIndex } from '../internal/operators/findIndex';\nexport { first } from '../internal/operators/first';\nexport { groupBy } from '../internal/operators/groupBy';\nexport { ignoreElements } from '../internal/operators/ignoreElements';\nexport { isEmpty } from '../internal/operators/isEmpty';\nexport { last } from '../internal/operators/last';\nexport { map } from '../internal/operators/map';\nexport { mapTo } from '../internal/operators/mapTo';\nexport { materialize } from '../internal/operators/materialize';\nexport { max } from '../internal/operators/max';\nexport { merge } from '../internal/operators/merge';\nexport { mergeAll } from '../internal/operators/mergeAll';\nexport { mergeMap, flatMap } from '../internal/operators/mergeMap';\nexport { mergeMapTo } from '../internal/operators/mergeMapTo';\nexport { mergeScan } from '../internal/operators/mergeScan';\nexport { min } from '../internal/operators/min';\nexport { multicast } from '../internal/operators/multicast';\nexport { observeOn } from '../internal/operators/observeOn';\nexport { onErrorResumeNext } from '../internal/operators/onErrorResumeNext';\nexport { pairwise } from '../internal/operators/pairwise';\nexport { partition } from '../internal/operators/partition';\nexport { pluck } from '../internal/operators/pluck';\nexport { publish } from '../internal/operators/publish';\nexport { publishBehavior } from '../internal/operators/publishBehavior';\nexport { publishLast } from '../internal/operators/publishLast';\nexport { publishReplay } from '../internal/operators/publishReplay';\nexport { race } from '../internal/operators/race';\nexport { reduce } from '../internal/operators/reduce';\nexport { repeat } from '../internal/operators/repeat';\nexport { repeatWhen } from '../internal/operators/repeatWhen';\nexport { retry } from '../internal/operators/retry';\nexport { retryWhen } from '../internal/operators/retryWhen';\nexport { refCount } from '../internal/operators/refCount';\nexport { sample } from '../internal/operators/sample';\nexport { sampleTime } from '../internal/operators/sampleTime';\nexport { scan } from '../internal/operators/scan';\nexport { sequenceEqual } from '../internal/operators/sequenceEqual';\nexport { share } from '../internal/operators/share';\nexport { shareReplay } from '../internal/operators/shareReplay';\nexport { single } from '../internal/operators/single';\nexport { skip } from '../internal/operators/skip';\nexport { skipLast } from '../internal/operators/skipLast';\nexport { skipUntil } from '../internal/operators/skipUntil';\nexport { skipWhile } from '../internal/operators/skipWhile';\nexport { startWith } from '../internal/operators/startWith';\nexport { subscribeOn } from '../internal/operators/subscribeOn';\nexport { switchAll } from '../internal/operators/switchAll';\nexport { switchMap } from '../internal/operators/switchMap';\nexport { switchMapTo } from '../internal/operators/switchMapTo';\nexport { take } from '../internal/operators/take';\nexport { takeLast } from '../internal/operators/takeLast';\nexport { takeUntil } from '../internal/operators/takeUntil';\nexport { takeWhile } from '../internal/operators/takeWhile';\nexport { tap } from '../internal/operators/tap';\nexport { throttle } from '../internal/operators/throttle';\nexport { throttleTime } from '../internal/operators/throttleTime';\nexport { throwIfEmpty } from '../internal/operators/throwIfEmpty';\nexport { timeInterval } from '../internal/operators/timeInterval';\nexport { timeout } from '../internal/operators/timeout';\nexport { timeoutWith } from '../internal/operators/timeoutWith';\nexport { timestamp } from '../internal/operators/timestamp';\nexport { toArray } from '../internal/operators/toArray';\nexport { window } from '../internal/operators/window';\nexport { windowCount } from '../internal/operators/windowCount';\nexport { windowTime } from '../internal/operators/windowTime';\nexport { windowToggle } from '../internal/operators/windowToggle';\nexport { windowWhen } from '../internal/operators/windowWhen';\nexport { withLatestFrom } from '../internal/operators/withLatestFrom';\nexport { zip } from '../internal/operators/zip';\nexport { zipAll } from '../internal/operators/zipAll';\n//# sourceMappingURL=index.js.map","import { Subscriber } from '../Subscriber';\nimport { ArgumentOutOfRangeError } from '../util/ArgumentOutOfRangeError';\nexport function skipLast(count) {\n    return (source) => source.lift(new SkipLastOperator(count));\n}\nclass SkipLastOperator {\n    constructor(_skipCount) {\n        this._skipCount = _skipCount;\n        if (this._skipCount < 0) {\n            throw new ArgumentOutOfRangeError;\n        }\n    }\n    call(subscriber, source) {\n        if (this._skipCount === 0) {\n            return source.subscribe(new Subscriber(subscriber));\n        }\n        else {\n            return source.subscribe(new SkipLastSubscriber(subscriber, this._skipCount));\n        }\n    }\n}\nclass SkipLastSubscriber extends Subscriber {\n    constructor(destination, _skipCount) {\n        super(destination);\n        this._skipCount = _skipCount;\n        this._count = 0;\n        this._ring = new Array(_skipCount);\n    }\n    _next(value) {\n        const skipCount = this._skipCount;\n        const count = this._count++;\n        if (count < skipCount) {\n            this._ring[count] = value;\n        }\n        else {\n            const currentIndex = count % skipCount;\n            const ring = this._ring;\n            const oldValue = ring[currentIndex];\n            ring[currentIndex] = value;\n            this.destination.next(oldValue);\n        }\n    }\n}\n//# sourceMappingURL=skipLast.js.map","import { SubscriptionLog } from './SubscriptionLog';\nexport class SubscriptionLoggable {\n    constructor() {\n        this.subscriptions = [];\n    }\n    logSubscribedFrame() {\n        this.subscriptions.push(new SubscriptionLog(this.scheduler.now()));\n        return this.subscriptions.length - 1;\n    }\n    logUnsubscribedFrame(index) {\n        const subscriptionLogs = this.subscriptions;\n        const oldSubscriptionLog = subscriptionLogs[index];\n        subscriptionLogs[index] = new SubscriptionLog(oldSubscriptionLog.subscribedFrame, this.scheduler.now());\n    }\n}\n//# sourceMappingURL=SubscriptionLoggable.js.map","import { Subscriber } from '../Subscriber';\nexport function dematerialize() {\n    return function dematerializeOperatorFunction(source) {\n        return source.lift(new DeMaterializeOperator());\n    };\n}\nclass DeMaterializeOperator {\n    call(subscriber, source) {\n        return source.subscribe(new DeMaterializeSubscriber(subscriber));\n    }\n}\nclass DeMaterializeSubscriber extends Subscriber {\n    constructor(destination) {\n        super(destination);\n    }\n    _next(value) {\n        value.observe(this.destination);\n    }\n}\n//# sourceMappingURL=dematerialize.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, InjectionToken, Input} from '@angular/core';\n\nlet nextUniqueId = 0;\n\n/**\n * Injection token that can be used to reference instances of `MatError`. It serves as\n * alternative token to the actual `MatError` class which could cause unnecessary\n * retention of the class and its directive metadata.\n */\nexport const MAT_ERROR = new InjectionToken<MatError>('MatError');\n\n/** Single error message to be shown underneath the form field. */\n@Directive({\n  selector: 'mat-error',\n  host: {\n    'class': 'mat-error',\n    'role': 'alert',\n    '[attr.id]': 'id',\n  },\n  providers: [{provide: MAT_ERROR, useExisting: MatError}],\n})\nexport class MatError {\n  @Input() id: string = `mat-error-${nextUniqueId++}`;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {\n  animate,\n  state,\n  style,\n  transition,\n  trigger,\n  AnimationTriggerMetadata,\n} from '@angular/animations';\n\n/**\n * Animations used by the MatFormField.\n * @docs-private\n */\nexport const matFormFieldAnimations: {\n  readonly transitionMessages: AnimationTriggerMetadata\n} = {\n  /** Animation that transitions the form field's error and hint messages. */\n  transitionMessages: trigger('transitionMessages', [\n    // TODO(mmalerba): Use angular animations for label animation as well.\n    state('enter', style({ opacity: 1, transform: 'translateY(0%)' })),\n    transition('void => enter', [\n      style({ opacity: 0, transform: 'translateY(-100%)' }),\n      animate('300ms cubic-bezier(0.55, 0, 0.55, 0.2)'),\n    ]),\n  ])\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Observable} from 'rxjs';\nimport {NgControl} from '@angular/forms';\nimport {Directive} from '@angular/core';\n\n\n/** An interface which allows a control to work inside of a `MatFormField`. */\n@Directive()\nexport abstract class MatFormFieldControl<T> {\n  /** The value of the control. */\n  value: T | null;\n\n  /**\n   * Stream that emits whenever the state of the control changes such that the parent `MatFormField`\n   * needs to run change detection.\n   */\n  readonly stateChanges: Observable<void>;\n\n  /** The element ID for this control. */\n  readonly id: string;\n\n  /** The placeholder for this control. */\n  readonly placeholder: string;\n\n  /** Gets the NgControl for this control. */\n  readonly ngControl: NgControl | null;\n\n  /** Whether the control is focused. */\n  readonly focused: boolean;\n\n  /** Whether the control is empty. */\n  readonly empty: boolean;\n\n  /** Whether the `MatFormField` label should try to float. */\n  readonly shouldLabelFloat: boolean;\n\n  /** Whether the control is required. */\n  readonly required: boolean;\n\n  /** Whether the control is disabled. */\n  readonly disabled: boolean;\n\n  /** Whether the control is in an error state. */\n  readonly errorState: boolean;\n\n  /**\n   * An optional name for the control type that can be used to distinguish `mat-form-field` elements\n   * based on their control type. The form field will add a class,\n   * `mat-form-field-type-{{controlType}}` to its root element.\n   */\n  readonly controlType?: string;\n\n  /**\n   * Whether the input is currently in an autofilled state. If property is not present on the\n   * control it is assumed to be false.\n   */\n  readonly autofilled?: boolean;\n\n  /**\n   * Value of `aria-describedby` that should be merged with the described-by ids\n   * which are set by the form-field.\n   */\n  readonly userAriaDescribedBy?: string;\n\n  /** Sets the list of element IDs that currently describe this control. */\n  abstract setDescribedByIds(ids: string[]): void;\n\n  /** Handles a click on the control's container. */\n  abstract onContainerClick(event: MouseEvent): void;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/** @docs-private */\nexport function getMatFormFieldPlaceholderConflictError(): Error {\n  return Error('Placeholder attribute and child element were both specified.');\n}\n\n/** @docs-private */\nexport function getMatFormFieldDuplicatedHintError(align: string): Error {\n  return Error(`A hint was already declared for 'align=\"${align}\"'.`);\n}\n\n/** @docs-private */\nexport function getMatFormFieldMissingControlError(): Error {\n  return Error('mat-form-field must contain a MatFormFieldControl.');\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, InjectionToken, Input} from '@angular/core';\n\nlet nextUniqueId = 0;\n\n/**\n * Injection token that can be used to reference instances of `MatHint`. It serves as\n * alternative token to the actual `MatHint` class which could cause unnecessary\n * retention of the class and its directive metadata.\n *\n * *Note*: This is not part of the public API as the MDC-based form-field will not\n * need a lightweight token for `MatHint` and we want to reduce breaking changes.\n */\nexport const _MAT_HINT = new InjectionToken<MatHint>('MatHint');\n\n/** Hint text to be shown underneath the form field control. */\n@Directive({\n  selector: 'mat-hint',\n  host: {\n    'class': 'mat-hint',\n    '[class.mat-right]': 'align == \"end\"',\n    '[attr.id]': 'id',\n    // Remove align attribute to prevent it from interfering with layout.\n    '[attr.align]': 'null',\n  },\n  providers: [{provide: _MAT_HINT, useExisting: MatHint}],\n})\nexport class MatHint {\n  /** Whether to align the hint label at the start or end of the line. */\n  @Input() align: 'start' | 'end' = 'start';\n\n  /** Unique ID for the hint. Used for the aria-describedby on the form field control. */\n  @Input() id: string = `mat-hint-${nextUniqueId++}`;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive} from '@angular/core';\n\n\n/** The floating label for a `mat-form-field`. */\n@Directive({\n  selector: 'mat-label'\n})\nexport class MatLabel {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive} from '@angular/core';\n\n\n/**\n * The placeholder text for an `MatFormField`.\n * @deprecated Use `<mat-label>` to specify the label and the `placeholder` attribute to specify the\n *     placeholder.\n * @breaking-change 8.0.0\n */\n@Directive({\n  selector: 'mat-placeholder'\n})\nexport class MatPlaceholder {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, InjectionToken} from '@angular/core';\n\n/**\n * Injection token that can be used to reference instances of `MatPrefix`. It serves as\n * alternative token to the actual `MatPrefix` class which could cause unnecessary\n * retention of the class and its directive metadata.\n */\nexport const MAT_PREFIX = new InjectionToken<MatPrefix>('MatPrefix');\n\n/** Prefix to be placed in front of the form field. */\n@Directive({\n  selector: '[matPrefix]',\n  providers: [{provide: MAT_PREFIX, useExisting: MatPrefix}],\n})\nexport class MatPrefix {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, InjectionToken} from '@angular/core';\n\n/**\n * Injection token that can be used to reference instances of `MatSuffix`. It serves as\n * alternative token to the actual `MatSuffix` class which could cause unnecessary\n * retention of the class and its directive metadata.\n */\nexport const MAT_SUFFIX = new InjectionToken<MatSuffix>('MatSuffix');\n\n/** Suffix to be placed at the end of the form field. */\n@Directive({\n  selector: '[matSuffix]',\n  providers: [{provide: MAT_SUFFIX, useExisting: MatSuffix}],\n})\nexport class MatSuffix {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directionality} from '@angular/cdk/bidi';\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {\n  AfterContentChecked,\n  AfterContentInit,\n  AfterViewInit,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ContentChild,\n  ContentChildren,\n  ElementRef,\n  Inject,\n  InjectionToken,\n  Input,\n  NgZone,\n  Optional,\n  QueryList,\n  ViewChild,\n  ViewEncapsulation,\n  OnDestroy,\n} from '@angular/core';\nimport {\n  CanColor, CanColorCtor,\n  LabelOptions,\n  MAT_LABEL_GLOBAL_OPTIONS,\n  mixinColor,\n} from '@angular/material/core';\nimport {fromEvent, merge, Subject} from 'rxjs';\nimport {startWith, take, takeUntil} from 'rxjs/operators';\nimport {MAT_ERROR, MatError} from './error';\nimport {matFormFieldAnimations} from './form-field-animations';\nimport {MatFormFieldControl} from './form-field-control';\nimport {\n  getMatFormFieldDuplicatedHintError,\n  getMatFormFieldMissingControlError,\n  getMatFormFieldPlaceholderConflictError,\n} from './form-field-errors';\nimport {_MAT_HINT, MatHint} from './hint';\nimport {MatLabel} from './label';\nimport {MatPlaceholder} from './placeholder';\nimport {MAT_PREFIX, MatPrefix} from './prefix';\nimport {MAT_SUFFIX, MatSuffix} from './suffix';\nimport {Platform} from '@angular/cdk/platform';\nimport {NgControl} from '@angular/forms';\nimport {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';\n\n\nlet nextUniqueId = 0;\nconst floatingLabelScale = 0.75;\nconst outlineGapPadding = 5;\n\n\n/**\n * Boilerplate for applying mixins to MatFormField.\n * @docs-private\n */\nclass MatFormFieldBase {\n  constructor(public _elementRef: ElementRef) { }\n}\n\n/**\n * Base class to which we're applying the form field mixins.\n * @docs-private\n */\nconst _MatFormFieldMixinBase: CanColorCtor & typeof MatFormFieldBase =\n    mixinColor(MatFormFieldBase, 'primary');\n\n/** Possible appearance styles for the form field. */\nexport type MatFormFieldAppearance = 'legacy' | 'standard' | 'fill' | 'outline';\n\n/** Possible values for the \"floatLabel\" form-field input. */\nexport type FloatLabelType = 'always' | 'never' | 'auto';\n\n/**\n * Represents the default options for the form field that can be configured\n * using the `MAT_FORM_FIELD_DEFAULT_OPTIONS` injection token.\n */\nexport interface MatFormFieldDefaultOptions {\n  appearance?: MatFormFieldAppearance;\n  hideRequiredMarker?: boolean;\n  /**\n   * Whether the label for form-fields should by default float `always`,\n   * `never`, or `auto` (only when necessary).\n   */\n  floatLabel?: FloatLabelType;\n}\n\n/**\n * Injection token that can be used to configure the\n * default options for all form field within an app.\n */\nexport const MAT_FORM_FIELD_DEFAULT_OPTIONS =\n    new InjectionToken<MatFormFieldDefaultOptions>('MAT_FORM_FIELD_DEFAULT_OPTIONS');\n\n/**\n * Injection token that can be used to inject an instances of `MatFormField`. It serves\n * as alternative token to the actual `MatFormField` class which would cause unnecessary\n * retention of the `MatFormField` class and its component metadata.\n */\nexport const MAT_FORM_FIELD = new InjectionToken<MatFormField>('MatFormField');\n\n/** Container for form controls that applies Material Design styling and behavior. */\n@Component({\n  selector: 'mat-form-field',\n  exportAs: 'matFormField',\n  templateUrl: 'form-field.html',\n  // MatInput is a directive and can't have styles, so we need to include its styles here\n  // in form-field-input.css. The MatInput styles are fairly minimal so it shouldn't be a\n  // big deal for people who aren't using MatInput.\n  styleUrls: [\n    'form-field.css',\n    'form-field-fill.css',\n    'form-field-input.css',\n    'form-field-legacy.css',\n    'form-field-outline.css',\n    'form-field-standard.css',\n  ],\n  animations: [matFormFieldAnimations.transitionMessages],\n  host: {\n    'class': 'mat-form-field',\n    '[class.mat-form-field-appearance-standard]': 'appearance == \"standard\"',\n    '[class.mat-form-field-appearance-fill]': 'appearance == \"fill\"',\n    '[class.mat-form-field-appearance-outline]': 'appearance == \"outline\"',\n    '[class.mat-form-field-appearance-legacy]': 'appearance == \"legacy\"',\n    '[class.mat-form-field-invalid]': '_control.errorState',\n    '[class.mat-form-field-can-float]': '_canLabelFloat()',\n    '[class.mat-form-field-should-float]': '_shouldLabelFloat()',\n    '[class.mat-form-field-has-label]': '_hasFloatingLabel()',\n    '[class.mat-form-field-hide-placeholder]': '_hideControlPlaceholder()',\n    '[class.mat-form-field-disabled]': '_control.disabled',\n    '[class.mat-form-field-autofilled]': '_control.autofilled',\n    '[class.mat-focused]': '_control.focused',\n    '[class.mat-accent]': 'color == \"accent\"',\n    '[class.mat-warn]': 'color == \"warn\"',\n    '[class.ng-untouched]': '_shouldForward(\"untouched\")',\n    '[class.ng-touched]': '_shouldForward(\"touched\")',\n    '[class.ng-pristine]': '_shouldForward(\"pristine\")',\n    '[class.ng-dirty]': '_shouldForward(\"dirty\")',\n    '[class.ng-valid]': '_shouldForward(\"valid\")',\n    '[class.ng-invalid]': '_shouldForward(\"invalid\")',\n    '[class.ng-pending]': '_shouldForward(\"pending\")',\n    '[class._mat-animation-noopable]': '!_animationsEnabled',\n  },\n  inputs: ['color'],\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  providers: [\n    {provide: MAT_FORM_FIELD, useExisting: MatFormField},\n  ]\n})\n\nexport class MatFormField extends _MatFormFieldMixinBase\n    implements AfterContentInit, AfterContentChecked, AfterViewInit, OnDestroy, CanColor {\n  private _labelOptions: LabelOptions;\n\n  /**\n   * Whether the outline gap needs to be calculated\n   * immediately on the next change detection run.\n   */\n  private _outlineGapCalculationNeededImmediately = false;\n\n  /** Whether the outline gap needs to be calculated next time the zone has stabilized. */\n  private _outlineGapCalculationNeededOnStable = false;\n\n  private _destroyed = new Subject<void>();\n\n  /** The form-field appearance style. */\n  @Input()\n  get appearance(): MatFormFieldAppearance { return this._appearance; }\n  set appearance(value: MatFormFieldAppearance) {\n    const oldValue = this._appearance;\n\n    this._appearance = value || (this._defaults && this._defaults.appearance) || 'legacy';\n\n    if (this._appearance === 'outline' && oldValue !== value) {\n      this._outlineGapCalculationNeededOnStable = true;\n    }\n  }\n  _appearance: MatFormFieldAppearance;\n\n  /** Whether the required marker should be hidden. */\n  @Input()\n  get hideRequiredMarker(): boolean { return this._hideRequiredMarker; }\n  set hideRequiredMarker(value: boolean) {\n    this._hideRequiredMarker = coerceBooleanProperty(value);\n  }\n  private _hideRequiredMarker: boolean;\n\n  /** Override for the logic that disables the label animation in certain cases. */\n  private _showAlwaysAnimate = false;\n\n  /** Whether the floating label should always float or not. */\n  _shouldAlwaysFloat(): boolean {\n    return this.floatLabel === 'always' && !this._showAlwaysAnimate;\n  }\n\n  /** Whether the label can float or not. */\n  _canLabelFloat(): boolean { return this.floatLabel !== 'never'; }\n\n  /** State of the mat-hint and mat-error animations. */\n  _subscriptAnimationState: string = '';\n\n  /** Text for the form field hint. */\n  @Input()\n  get hintLabel(): string { return this._hintLabel; }\n  set hintLabel(value: string) {\n    this._hintLabel = value;\n    this._processHints();\n  }\n  private _hintLabel = '';\n\n  // Unique id for the hint label.\n  readonly _hintLabelId: string = `mat-hint-${nextUniqueId++}`;\n\n  // Unique id for the label element.\n  readonly _labelId = `mat-form-field-label-${nextUniqueId++}`;\n\n  /**\n   * Whether the label should always float, never float or float as the user types.\n   *\n   * Note: only the legacy appearance supports the `never` option. `never` was originally added as a\n   * way to make the floating label emulate the behavior of a standard input placeholder. However\n   * the form field now supports both floating labels and placeholders. Therefore in the non-legacy\n   * appearances the `never` option has been disabled in favor of just using the placeholder.\n   */\n  @Input()\n  get floatLabel(): FloatLabelType {\n    return this.appearance !== 'legacy' && this._floatLabel === 'never' ? 'auto' : this._floatLabel;\n  }\n  set floatLabel(value: FloatLabelType) {\n    if (value !== this._floatLabel) {\n      this._floatLabel = value || this._getDefaultFloatLabelState();\n      this._changeDetectorRef.markForCheck();\n    }\n  }\n  private _floatLabel: FloatLabelType;\n\n  /** Whether the Angular animations are enabled. */\n  _animationsEnabled: boolean;\n\n  /**\n   * @deprecated\n   * @breaking-change 8.0.0\n   */\n  @ViewChild('underline') underlineRef: ElementRef;\n\n  @ViewChild('connectionContainer', {static: true}) _connectionContainerRef: ElementRef;\n  @ViewChild('inputContainer') _inputContainerRef: ElementRef;\n  @ViewChild('label') private _label: ElementRef<HTMLElement>;\n\n  @ContentChild(MatFormFieldControl) _controlNonStatic: MatFormFieldControl<any>;\n  @ContentChild(MatFormFieldControl, {static: true}) _controlStatic: MatFormFieldControl<any>;\n  get _control() {\n    // TODO(crisbeto): we need this workaround in order to support both Ivy and ViewEngine.\n    //  We should clean this up once Ivy is the default renderer.\n    return this._explicitFormFieldControl || this._controlNonStatic || this._controlStatic;\n  }\n  set _control(value) {\n    this._explicitFormFieldControl = value;\n  }\n  private _explicitFormFieldControl: MatFormFieldControl<any>;\n\n  @ContentChild(MatLabel) _labelChildNonStatic: MatLabel;\n  @ContentChild(MatLabel, {static: true}) _labelChildStatic: MatLabel;\n  @ContentChild(MatPlaceholder) _placeholderChild: MatPlaceholder;\n\n  @ContentChildren(MAT_ERROR, {descendants: true}) _errorChildren: QueryList<MatError>;\n  @ContentChildren(_MAT_HINT, {descendants: true}) _hintChildren: QueryList<MatHint>;\n  @ContentChildren(MAT_PREFIX, {descendants: true}) _prefixChildren: QueryList<MatPrefix>;\n  @ContentChildren(MAT_SUFFIX, {descendants: true}) _suffixChildren: QueryList<MatSuffix>;\n\n  constructor(\n      public _elementRef: ElementRef, private _changeDetectorRef: ChangeDetectorRef,\n      @Optional() @Inject(MAT_LABEL_GLOBAL_OPTIONS) labelOptions: LabelOptions,\n      @Optional() private _dir: Directionality,\n      @Optional() @Inject(MAT_FORM_FIELD_DEFAULT_OPTIONS) private _defaults:\n          MatFormFieldDefaultOptions, private _platform: Platform, private _ngZone: NgZone,\n      @Optional() @Inject(ANIMATION_MODULE_TYPE) _animationMode: string) {\n    super(_elementRef);\n\n    this._labelOptions = labelOptions ? labelOptions : {};\n    this.floatLabel = this._getDefaultFloatLabelState();\n    this._animationsEnabled = _animationMode !== 'NoopAnimations';\n\n    // Set the default through here so we invoke the setter on the first run.\n    this.appearance = (_defaults && _defaults.appearance) ? _defaults.appearance : 'legacy';\n    this._hideRequiredMarker = (_defaults && _defaults.hideRequiredMarker != null) ?\n        _defaults.hideRequiredMarker : false;\n  }\n\n  /**\n   * Gets the id of the label element. If no label is present, returns `null`.\n   */\n  getLabelId(): string|null {\n    return this._hasFloatingLabel() ? this._labelId : null;\n  }\n\n  /**\n   * Gets an ElementRef for the element that a overlay attached to the form-field should be\n   * positioned relative to.\n   */\n  getConnectedOverlayOrigin(): ElementRef {\n    return this._connectionContainerRef || this._elementRef;\n  }\n\n  ngAfterContentInit() {\n    this._validateControlChild();\n\n    const control = this._control;\n\n    if (control.controlType) {\n      this._elementRef.nativeElement.classList.add(`mat-form-field-type-${control.controlType}`);\n    }\n\n    // Subscribe to changes in the child control state in order to update the form field UI.\n    control.stateChanges.pipe(startWith(null!)).subscribe(() => {\n      this._validatePlaceholders();\n      this._syncDescribedByIds();\n      this._changeDetectorRef.markForCheck();\n    });\n\n    // Run change detection if the value changes.\n    if (control.ngControl && control.ngControl.valueChanges) {\n      control.ngControl.valueChanges\n        .pipe(takeUntil(this._destroyed))\n        .subscribe(() => this._changeDetectorRef.markForCheck());\n    }\n\n    // Note that we have to run outside of the `NgZone` explicitly,\n    // in order to avoid throwing users into an infinite loop\n    // if `zone-patch-rxjs` is included.\n    this._ngZone.runOutsideAngular(() => {\n      this._ngZone.onStable.pipe(takeUntil(this._destroyed)).subscribe(() => {\n        if (this._outlineGapCalculationNeededOnStable) {\n          this.updateOutlineGap();\n        }\n      });\n    });\n\n    // Run change detection and update the outline if the suffix or prefix changes.\n    merge(this._prefixChildren.changes, this._suffixChildren.changes).subscribe(() => {\n      this._outlineGapCalculationNeededOnStable = true;\n      this._changeDetectorRef.markForCheck();\n    });\n\n    // Re-validate when the number of hints changes.\n    this._hintChildren.changes.pipe(startWith(null)).subscribe(() => {\n      this._processHints();\n      this._changeDetectorRef.markForCheck();\n    });\n\n    // Update the aria-described by when the number of errors changes.\n    this._errorChildren.changes.pipe(startWith(null)).subscribe(() => {\n      this._syncDescribedByIds();\n      this._changeDetectorRef.markForCheck();\n    });\n\n    if (this._dir) {\n      this._dir.change.pipe(takeUntil(this._destroyed)).subscribe(() => {\n        if (typeof requestAnimationFrame === 'function') {\n          this._ngZone.runOutsideAngular(() => {\n            requestAnimationFrame(() => this.updateOutlineGap());\n          });\n        } else {\n          this.updateOutlineGap();\n        }\n      });\n    }\n  }\n\n  ngAfterContentChecked() {\n    this._validateControlChild();\n    if (this._outlineGapCalculationNeededImmediately) {\n      this.updateOutlineGap();\n    }\n  }\n\n  ngAfterViewInit() {\n    // Avoid animations on load.\n    this._subscriptAnimationState = 'enter';\n    this._changeDetectorRef.detectChanges();\n  }\n\n  ngOnDestroy() {\n    this._destroyed.next();\n    this._destroyed.complete();\n  }\n\n  /** Determines whether a class from the NgControl should be forwarded to the host element. */\n  _shouldForward(prop: keyof NgControl): boolean {\n    const ngControl = this._control ? this._control.ngControl : null;\n    return ngControl && ngControl[prop];\n  }\n\n  _hasPlaceholder() {\n    return !!(this._control && this._control.placeholder || this._placeholderChild);\n  }\n\n  _hasLabel() {\n    return !!(this._labelChildNonStatic || this._labelChildStatic);\n  }\n\n  _shouldLabelFloat() {\n    return this._canLabelFloat() &&\n        ((this._control && this._control.shouldLabelFloat) || this._shouldAlwaysFloat());\n  }\n\n  _hideControlPlaceholder() {\n    // In the legacy appearance the placeholder is promoted to a label if no label is given.\n    return this.appearance === 'legacy' && !this._hasLabel() ||\n        this._hasLabel() && !this._shouldLabelFloat();\n  }\n\n  _hasFloatingLabel() {\n    // In the legacy appearance the placeholder is promoted to a label if no label is given.\n    return this._hasLabel() || this.appearance === 'legacy' && this._hasPlaceholder();\n  }\n\n  /** Determines whether to display hints or errors. */\n  _getDisplayedMessages(): 'error' | 'hint' {\n    return (this._errorChildren && this._errorChildren.length > 0 &&\n        this._control.errorState) ? 'error' : 'hint';\n  }\n\n  /** Animates the placeholder up and locks it in position. */\n  _animateAndLockLabel(): void {\n    if (this._hasFloatingLabel() && this._canLabelFloat()) {\n      // If animations are disabled, we shouldn't go in here,\n      // because the `transitionend` will never fire.\n      if (this._animationsEnabled && this._label) {\n        this._showAlwaysAnimate = true;\n\n        fromEvent(this._label.nativeElement, 'transitionend').pipe(take(1)).subscribe(() => {\n          this._showAlwaysAnimate = false;\n        });\n      }\n\n      this.floatLabel = 'always';\n      this._changeDetectorRef.markForCheck();\n    }\n  }\n\n  /**\n   * Ensure that there is only one placeholder (either `placeholder` attribute on the child control\n   * or child element with the `mat-placeholder` directive).\n   */\n  private _validatePlaceholders() {\n    if (this._control.placeholder && this._placeholderChild &&\n      (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw getMatFormFieldPlaceholderConflictError();\n    }\n  }\n\n  /** Does any extra processing that is required when handling the hints. */\n  private _processHints() {\n    this._validateHints();\n    this._syncDescribedByIds();\n  }\n\n  /**\n   * Ensure that there is a maximum of one of each `<mat-hint>` alignment specified, with the\n   * attribute being considered as `align=\"start\"`.\n   */\n  private _validateHints() {\n    if (this._hintChildren && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      let startHint: MatHint;\n      let endHint: MatHint;\n      this._hintChildren.forEach((hint: MatHint) => {\n        if (hint.align === 'start') {\n          if (startHint || this.hintLabel) {\n            throw getMatFormFieldDuplicatedHintError('start');\n          }\n          startHint = hint;\n        } else if (hint.align === 'end') {\n          if (endHint) {\n            throw getMatFormFieldDuplicatedHintError('end');\n          }\n          endHint = hint;\n        }\n      });\n    }\n  }\n\n  /** Gets the default float label state. */\n  private _getDefaultFloatLabelState(): FloatLabelType {\n    return (this._defaults && this._defaults.floatLabel) || this._labelOptions.float || 'auto';\n  }\n\n  /**\n   * Sets the list of element IDs that describe the child control. This allows the control to update\n   * its `aria-describedby` attribute accordingly.\n   */\n  private _syncDescribedByIds() {\n    if (this._control) {\n      let ids: string[] = [];\n\n      // TODO(wagnermaciel): Remove the type check when we find the root cause of this bug.\n      if (this._control.userAriaDescribedBy &&\n        typeof this._control.userAriaDescribedBy === 'string') {\n        ids.push(...this._control.userAriaDescribedBy.split(' '));\n      }\n\n      if (this._getDisplayedMessages() === 'hint') {\n        const startHint = this._hintChildren ?\n            this._hintChildren.find(hint => hint.align === 'start') : null;\n        const endHint = this._hintChildren ?\n            this._hintChildren.find(hint => hint.align === 'end') : null;\n\n        if (startHint) {\n          ids.push(startHint.id);\n        } else if (this._hintLabel) {\n          ids.push(this._hintLabelId);\n        }\n\n        if (endHint) {\n          ids.push(endHint.id);\n        }\n      } else if (this._errorChildren) {\n        ids.push(...this._errorChildren.map(error => error.id));\n      }\n\n      this._control.setDescribedByIds(ids);\n    }\n  }\n\n  /** Throws an error if the form field's control is missing. */\n  protected _validateControlChild() {\n    if (!this._control && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw getMatFormFieldMissingControlError();\n    }\n  }\n\n  /**\n   * Updates the width and position of the gap in the outline. Only relevant for the outline\n   * appearance.\n   */\n  updateOutlineGap() {\n    const labelEl = this._label ? this._label.nativeElement : null;\n\n    if (this.appearance !== 'outline' || !labelEl || !labelEl.children.length ||\n        !labelEl.textContent!.trim()) {\n      return;\n    }\n\n    if (!this._platform.isBrowser) {\n      // getBoundingClientRect isn't available on the server.\n      return;\n    }\n    // If the element is not present in the DOM, the outline gap will need to be calculated\n    // the next time it is checked and in the DOM.\n    if (!this._isAttachedToDOM()) {\n      this._outlineGapCalculationNeededImmediately = true;\n      return;\n    }\n\n    let startWidth = 0;\n    let gapWidth = 0;\n\n    const container = this._connectionContainerRef.nativeElement;\n    const startEls = container.querySelectorAll('.mat-form-field-outline-start');\n    const gapEls = container.querySelectorAll('.mat-form-field-outline-gap');\n\n    if (this._label && this._label.nativeElement.children.length) {\n      const containerRect = container.getBoundingClientRect();\n\n      // If the container's width and height are zero, it means that the element is\n      // invisible and we can't calculate the outline gap. Mark the element as needing\n      // to be checked the next time the zone stabilizes. We can't do this immediately\n      // on the next change detection, because even if the element becomes visible,\n      // the `ClientRect` won't be reclaculated immediately. We reset the\n      // `_outlineGapCalculationNeededImmediately` flag some we don't run the checks twice.\n      if (containerRect.width === 0 && containerRect.height === 0) {\n        this._outlineGapCalculationNeededOnStable = true;\n        this._outlineGapCalculationNeededImmediately = false;\n        return;\n      }\n\n      const containerStart = this._getStartEnd(containerRect);\n      const labelChildren = labelEl.children;\n      const labelStart = this._getStartEnd(labelChildren[0].getBoundingClientRect());\n      let labelWidth = 0;\n\n      for (let i = 0; i < labelChildren.length; i++) {\n        labelWidth += (labelChildren[i] as HTMLElement).offsetWidth;\n      }\n      startWidth = Math.abs(labelStart - containerStart) - outlineGapPadding;\n      gapWidth = labelWidth > 0 ? labelWidth * floatingLabelScale + outlineGapPadding * 2 : 0;\n    }\n\n    for (let i = 0; i < startEls.length; i++) {\n      startEls[i].style.width = `${startWidth}px`;\n    }\n    for (let i = 0; i < gapEls.length; i++) {\n      gapEls[i].style.width = `${gapWidth}px`;\n    }\n\n    this._outlineGapCalculationNeededOnStable =\n        this._outlineGapCalculationNeededImmediately = false;\n  }\n\n  /** Gets the start end of the rect considering the current directionality. */\n  private _getStartEnd(rect: ClientRect): number {\n    return (this._dir && this._dir.value === 'rtl') ? rect.right : rect.left;\n  }\n\n  /** Checks whether the form field is attached to the DOM. */\n  private _isAttachedToDOM(): boolean {\n    const element: HTMLElement = this._elementRef.nativeElement;\n\n    if (element.getRootNode) {\n      const rootNode = element.getRootNode();\n      // If the element is inside the DOM the root node will be either the document\n      // or the closest shadow root, otherwise it'll be the element itself.\n      return rootNode && rootNode !== element;\n    }\n\n    // Otherwise fall back to checking if it's in the document. This doesn't account for\n    // shadow DOM, however browser that support shadow DOM should support `getRootNode` as well.\n    return document.documentElement!.contains(element);\n  }\n\n  static ngAcceptInputType_hideRequiredMarker: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ObserversModule} from '@angular/cdk/observers';\nimport {CommonModule} from '@angular/common';\nimport {NgModule} from '@angular/core';\nimport {MatCommonModule} from '@angular/material/core';\nimport {MatError} from './error';\nimport {MatFormField} from './form-field';\nimport {MatHint} from './hint';\nimport {MatLabel} from './label';\nimport {MatPlaceholder} from './placeholder';\nimport {MatPrefix} from './prefix';\nimport {MatSuffix} from './suffix';\n\n@NgModule({\n  declarations: [\n    MatError,\n    MatFormField,\n    MatHint,\n    MatLabel,\n    MatPlaceholder,\n    MatPrefix,\n    MatSuffix,\n  ],\n  imports: [\n    CommonModule,\n    MatCommonModule,\n    ObserversModule,\n  ],\n  exports: [\n    MatCommonModule,\n    MatError,\n    MatFormField,\n    MatHint,\n    MatLabel,\n    MatPlaceholder,\n    MatPrefix,\n    MatSuffix,\n  ],\n})\nexport class MatFormFieldModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './form-field-module';\nexport * from './error';\nexport * from './form-field';\nexport {MatFormFieldControl} from './form-field-control';\nexport * from './form-field-errors';\nexport * from './hint';\nexport * from './placeholder';\nexport * from './prefix';\nexport * from './suffix';\nexport * from './label';\nexport * from './form-field-animations';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar auditTime_1 = require(\"../../operator/auditTime\");\nrxjs_1.Observable.prototype.auditTime = auditTime_1.auditTime;\n//# sourceMappingURL=auditTime.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar publishLast_1 = require(\"../../operator/publishLast\");\nrxjs_1.Observable.prototype.publishLast = publishLast_1.publishLast;\n//# sourceMappingURL=publishLast.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Returns a new Observable that multicasts (shares) the original Observable. As long as there is at least one\n * Subscriber this Observable will be subscribed and emitting data. When all subscribers have unsubscribed it will\n * unsubscribe from the source Observable. Because the Observable is multicasting it makes the stream `hot`.\n *\n * This behaves similarly to .publish().refCount(), with a behavior difference when the source observable emits complete.\n * .publish().refCount() will not resubscribe to the original source, however .share() will resubscribe to the original source.\n * Observable.of(\"test\").publish().refCount() will not re-emit \"test\" on new subscriptions, Observable.of(\"test\").share() will\n * re-emit \"test\" to new subscriptions.\n *\n * <img src=\"./img/share.png\" width=\"100%\">\n *\n * @return {Observable<T>} An Observable that upon connection causes the source Observable to emit items to its Observers.\n * @method share\n * @owner Observable\n */\nfunction share() {\n    return operators_1.share()(this);\n}\nexports.share = share;\n//# sourceMappingURL=share.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * @param project\n * @return {Observable<R>|WebSocketSubject<T>|Observable<T>}\n * @method zipAll\n * @owner Observable\n */\nfunction zipAll(project) {\n    return operators_1.zipAll(project)(this);\n}\nexports.zipAll = zipAll;\n//# sourceMappingURL=zipAll.js.map","import { Observable } from '../Observable';\nimport { async } from '../scheduler/async';\nimport { isNumeric } from '../util/isNumeric';\nexport function interval(period = 0, scheduler = async) {\n    if (!isNumeric(period) || period < 0) {\n        period = 0;\n    }\n    if (!scheduler || typeof scheduler.schedule !== 'function') {\n        scheduler = async;\n    }\n    return new Observable(subscriber => {\n        subscriber.add(scheduler.schedule(dispatch, period, { subscriber, counter: 0, period }));\n        return subscriber;\n    });\n}\nfunction dispatch(state) {\n    const { subscriber, counter, period } = state;\n    subscriber.next(counter);\n    this.schedule({ subscriber, counter: counter + 1, period }, period);\n}\n//# sourceMappingURL=interval.js.map","import { Subscriber } from './Subscriber';\nexport class OuterSubscriber extends Subscriber {\n    notifyNext(outerValue, innerValue, outerIndex, innerIndex, innerSub) {\n        this.destination.next(innerValue);\n    }\n    notifyError(error, innerSub) {\n        this.destination.error(error);\n    }\n    notifyComplete(innerSub) {\n        this.destination.complete();\n    }\n}\n//# sourceMappingURL=OuterSubscriber.js.map","import { Subscriber } from '../Subscriber';\nexport function map(project, thisArg) {\n    return function mapOperation(source) {\n        if (typeof project !== 'function') {\n            throw new TypeError('argument is not a function. Are you looking for `mapTo()`?');\n        }\n        return source.lift(new MapOperator(project, thisArg));\n    };\n}\nexport class MapOperator {\n    constructor(project, thisArg) {\n        this.project = project;\n        this.thisArg = thisArg;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new MapSubscriber(subscriber, this.project, this.thisArg));\n    }\n}\nclass MapSubscriber extends Subscriber {\n    constructor(destination, project, thisArg) {\n        super(destination);\n        this.project = project;\n        this.count = 0;\n        this.thisArg = thisArg || this;\n    }\n    _next(value) {\n        let result;\n        try {\n            result = this.project.call(this.thisArg, value, this.count++);\n        }\n        catch (err) {\n            this.destination.error(err);\n            return;\n        }\n        this.destination.next(result);\n    }\n}\n//# sourceMappingURL=map.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.defer = rxjs_1.defer;\n//# sourceMappingURL=defer.js.map","(function webpackUniversalModuleDefinition(root, factory) {\n\tif(typeof exports === 'object' && typeof module === 'object')\n\t\tmodule.exports = factory();\n\telse if(typeof define === 'function' && define.amd)\n\t\tdefine(\"pdfjs-dist/build/pdf\", [], factory);\n\telse if(typeof exports === 'object')\n\t\texports[\"pdfjs-dist/build/pdf\"] = factory();\n\telse\n\t\troot[\"pdfjs-dist/build/pdf\"] = factory();\n})(this, function() {\nreturn "," \t// The module cache\n \tvar installedModules = {};\n\n \t// The require function\n \tfunction __w_pdfjs_require__(moduleId) {\n\n \t\t// Check if module is in cache\n \t\tif(installedModules[moduleId]) {\n \t\t\treturn installedModules[moduleId].exports;\n \t\t}\n \t\t// Create a new module (and put it into the cache)\n \t\tvar module = installedModules[moduleId] = {\n \t\t\ti: moduleId,\n \t\t\tl: false,\n \t\t\texports: {}\n \t\t};\n\n \t\t// Execute the module function\n \t\tmodules[moduleId].call(module.exports, module, module.exports, __w_pdfjs_require__);\n\n \t\t// Flag the module as loaded\n \t\tmodule.l = true;\n\n \t\t// Return the exports of the module\n \t\treturn module.exports;\n \t}\n\n\n \t// expose the modules object (__webpack_modules__)\n \t__w_pdfjs_require__.m = modules;\n\n \t// expose the module cache\n \t__w_pdfjs_require__.c = installedModules;\n\n \t// define getter function for harmony exports\n \t__w_pdfjs_require__.d = function(exports, name, getter) {\n \t\tif(!__w_pdfjs_require__.o(exports, name)) {\n \t\t\tObject.defineProperty(exports, name, { enumerable: true, get: getter });\n \t\t}\n \t};\n\n \t// define __esModule on exports\n \t__w_pdfjs_require__.r = function(exports) {\n \t\tif(typeof Symbol !== 'undefined' && Symbol.toStringTag) {\n \t\t\tObject.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });\n \t\t}\n \t\tObject.defineProperty(exports, '__esModule', { value: true });\n \t};\n\n \t// create a fake namespace object\n \t// mode & 1: value is a module id, require it\n \t// mode & 2: merge all properties of value into the ns\n \t// mode & 4: return value when already ns object\n \t// mode & 8|1: behave like require\n \t__w_pdfjs_require__.t = function(value, mode) {\n \t\tif(mode & 1) value = __w_pdfjs_require__(value);\n \t\tif(mode & 8) return value;\n \t\tif((mode & 4) && typeof value === 'object' && value && value.__esModule) return value;\n \t\tvar ns = Object.create(null);\n \t\t__w_pdfjs_require__.r(ns);\n \t\tObject.defineProperty(ns, 'default', { enumerable: true, value: value });\n \t\tif(mode & 2 && typeof value != 'string') for(var key in value) __w_pdfjs_require__.d(ns, key, function(key) { return value[key]; }.bind(null, key));\n \t\treturn ns;\n \t};\n\n \t// getDefaultExport function for compatibility with non-harmony modules\n \t__w_pdfjs_require__.n = function(module) {\n \t\tvar getter = module && module.__esModule ?\n \t\t\tfunction getDefault() { return module['default']; } :\n \t\t\tfunction getModuleExports() { return module; };\n \t\t__w_pdfjs_require__.d(getter, 'a', getter);\n \t\treturn getter;\n \t};\n\n \t// Object.prototype.hasOwnProperty.call\n \t__w_pdfjs_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n\n \t// __webpack_public_path__\n \t__w_pdfjs_require__.p = \"\";\n\n\n \t// Load entry module and return exports\n \treturn __w_pdfjs_require__(__w_pdfjs_require__.s = 0);\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport {\n  addLinkAttributes,\n  getFilenameFromUrl,\n  isFetchSupported,\n  isValidFetchUrl,\n  LinkTarget,\n  loadScript,\n  PDFDateString,\n  RenderingCancelledException,\n} from \"./display/display_utils.js\";\nimport {\n  build,\n  getDocument,\n  LoopbackPort,\n  PDFDataRangeTransport,\n  PDFWorker,\n  setPDFNetworkStreamFactory,\n  version,\n} from \"./display/api.js\";\nimport {\n  CMapCompressionType,\n  createObjectURL,\n  createPromiseCapability,\n  createValidAbsoluteUrl,\n  InvalidPDFException,\n  MissingPDFException,\n  OPS,\n  PasswordResponses,\n  PermissionFlag,\n  removeNullCharacters,\n  shadow,\n  UnexpectedResponseException,\n  UNSUPPORTED_FEATURES,\n  Util,\n  VerbosityLevel,\n} from \"./shared/util.js\";\nimport { AnnotationLayer } from \"./display/annotation_layer.js\";\nimport { apiCompatibilityParams } from \"./display/api_compatibility.js\";\nimport { GlobalWorkerOptions } from \"./display/worker_options.js\";\nimport { renderTextLayer } from \"./display/text_layer.js\";\nimport { SVGGraphics } from \"./display/svg.js\";\n\n/* eslint-disable-next-line no-unused-vars */\nconst pdfjsVersion =\n  typeof PDFJSDev !== \"undefined\" ? PDFJSDev.eval(\"BUNDLE_VERSION\") : void 0;\n/* eslint-disable-next-line no-unused-vars */\nconst pdfjsBuild =\n  typeof PDFJSDev !== \"undefined\" ? PDFJSDev.eval(\"BUNDLE_BUILD\") : void 0;\n\nif (typeof PDFJSDev === \"undefined\" || !PDFJSDev.test(\"PRODUCTION\")) {\n  const streamsPromise = Promise.all([\n    import(\"pdfjs/display/network.js\"),\n    import(\"pdfjs/display/fetch_stream.js\"),\n  ]);\n  setPDFNetworkStreamFactory(params => {\n    return streamsPromise.then(streams => {\n      const [{ PDFNetworkStream }, { PDFFetchStream }] = streams;\n      if (isFetchSupported() && isValidFetchUrl(params.url)) {\n        return new PDFFetchStream(params);\n      }\n      return new PDFNetworkStream(params);\n    });\n  });\n} else if (PDFJSDev.test(\"GENERIC\")) {\n  const { isNodeJS } = require(\"./shared/is_node.js\");\n  if (isNodeJS) {\n    const PDFNodeStream = require(\"./display/node_stream.js\").PDFNodeStream;\n    setPDFNetworkStreamFactory(params => {\n      return new PDFNodeStream(params);\n    });\n  } else {\n    const PDFNetworkStream = require(\"./display/network.js\").PDFNetworkStream;\n    let PDFFetchStream;\n    if (isFetchSupported()) {\n      PDFFetchStream = require(\"./display/fetch_stream.js\").PDFFetchStream;\n    }\n    setPDFNetworkStreamFactory(params => {\n      if (PDFFetchStream && isValidFetchUrl(params.url)) {\n        return new PDFFetchStream(params);\n      }\n      return new PDFNetworkStream(params);\n    });\n  }\n} else if (PDFJSDev.test(\"CHROME\")) {\n  const PDFNetworkStream = require(\"./display/network.js\").PDFNetworkStream;\n  let PDFFetchStream;\n  const isChromeWithFetchCredentials = function () {\n    // fetch does not include credentials until Chrome 61.0.3138.0 and later.\n    // https://chromium.googlesource.com/chromium/src/+/2e231cf052ca5e68e22baf0008ac9e5e29121707\n    try {\n      // Indexed properties on window are read-only in Chrome 61.0.3151.0+\n      // https://chromium.googlesource.com/chromium/src.git/+/58ab4a971b06dec13e4edf9de8382ca6847f6190\n      window[999] = 123; // should throw. Note: JS strict mode MUST be enabled.\n      delete window[999];\n      return false;\n    } catch (e) {\n      return true;\n    }\n  };\n  if (isFetchSupported() && isChromeWithFetchCredentials()) {\n    PDFFetchStream = require(\"./display/fetch_stream.js\").PDFFetchStream;\n  }\n  setPDFNetworkStreamFactory(params => {\n    if (PDFFetchStream && isValidFetchUrl(params.url)) {\n      return new PDFFetchStream(params);\n    }\n    return new PDFNetworkStream(params);\n  });\n}\n\nexport {\n  // From \"./display/display_utils.js\":\n  addLinkAttributes,\n  getFilenameFromUrl,\n  LinkTarget,\n  loadScript,\n  PDFDateString,\n  RenderingCancelledException,\n  // From \"./display/api.js\":\n  build,\n  getDocument,\n  LoopbackPort,\n  PDFDataRangeTransport,\n  PDFWorker,\n  version,\n  // From \"./shared/util.js\":\n  CMapCompressionType,\n  createObjectURL,\n  createPromiseCapability,\n  createValidAbsoluteUrl,\n  InvalidPDFException,\n  MissingPDFException,\n  OPS,\n  PasswordResponses,\n  PermissionFlag,\n  removeNullCharacters,\n  shadow,\n  UnexpectedResponseException,\n  UNSUPPORTED_FEATURES,\n  Util,\n  VerbosityLevel,\n  // From \"./display/annotation_layer.js\":\n  AnnotationLayer,\n  // From \"./display/api_compatibility.js\":\n  apiCompatibilityParams,\n  // From \"./display/worker_options.js\":\n  GlobalWorkerOptions,\n  // From \"./display/text_layer.js\":\n  renderTextLayer,\n  // From \"./display/svg.js\":\n  SVGGraphics,\n};\n","/* Copyright 2015 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* eslint no-var: error */\n\nimport {\n  assert,\n  BaseException,\n  CMapCompressionType,\n  isString,\n  removeNullCharacters,\n  stringToBytes,\n  Util,\n  warn,\n} from \"../shared/util.js\";\n\nconst DEFAULT_LINK_REL = \"noopener noreferrer nofollow\";\nconst SVG_NS = \"http://www.w3.org/2000/svg\";\n\nclass DOMCanvasFactory {\n  create(width, height) {\n    if (width <= 0 || height <= 0) {\n      throw new Error(\"Invalid canvas size\");\n    }\n    const canvas = document.createElement(\"canvas\");\n    const context = canvas.getContext(\"2d\");\n    canvas.width = width;\n    canvas.height = height;\n    return {\n      canvas,\n      context,\n    };\n  }\n\n  reset(canvasAndContext, width, height) {\n    if (!canvasAndContext.canvas) {\n      throw new Error(\"Canvas is not specified\");\n    }\n    if (width <= 0 || height <= 0) {\n      throw new Error(\"Invalid canvas size\");\n    }\n    canvasAndContext.canvas.width = width;\n    canvasAndContext.canvas.height = height;\n  }\n\n  destroy(canvasAndContext) {\n    if (!canvasAndContext.canvas) {\n      throw new Error(\"Canvas is not specified\");\n    }\n    // Zeroing the width and height cause Firefox to release graphics\n    // resources immediately, which can greatly reduce memory consumption.\n    canvasAndContext.canvas.width = 0;\n    canvasAndContext.canvas.height = 0;\n    canvasAndContext.canvas = null;\n    canvasAndContext.context = null;\n  }\n}\n\nclass DOMCMapReaderFactory {\n  constructor({ baseUrl = null, isCompressed = false }) {\n    this.baseUrl = baseUrl;\n    this.isCompressed = isCompressed;\n  }\n\n  async fetch({ name }) {\n    if (!this.baseUrl) {\n      throw new Error(\n        'The CMap \"baseUrl\" parameter must be specified, ensure that ' +\n          'the \"cMapUrl\" and \"cMapPacked\" API parameters are provided.'\n      );\n    }\n    if (!name) {\n      throw new Error(\"CMap name must be specified.\");\n    }\n    const url = this.baseUrl + name + (this.isCompressed ? \".bcmap\" : \"\");\n    const compressionType = this.isCompressed\n      ? CMapCompressionType.BINARY\n      : CMapCompressionType.NONE;\n\n    if (\n      (typeof PDFJSDev !== \"undefined\" && PDFJSDev.test(\"MOZCENTRAL\")) ||\n      (isFetchSupported() && isValidFetchUrl(url, document.baseURI))\n    ) {\n      return fetch(url)\n        .then(async response => {\n          if (!response.ok) {\n            throw new Error(response.statusText);\n          }\n          let cMapData;\n          if (this.isCompressed) {\n            cMapData = new Uint8Array(await response.arrayBuffer());\n          } else {\n            cMapData = stringToBytes(await response.text());\n          }\n          return { cMapData, compressionType };\n        })\n        .catch(reason => {\n          throw new Error(\n            `Unable to load ${this.isCompressed ? \"binary \" : \"\"}` +\n              `CMap at: ${url}`\n          );\n        });\n    }\n\n    // The Fetch API is not supported.\n    return new Promise((resolve, reject) => {\n      const request = new XMLHttpRequest();\n      request.open(\"GET\", url, true);\n\n      if (this.isCompressed) {\n        request.responseType = \"arraybuffer\";\n      }\n      request.onreadystatechange = () => {\n        if (request.readyState !== XMLHttpRequest.DONE) {\n          return;\n        }\n        if (request.status === 200 || request.status === 0) {\n          let cMapData;\n          if (this.isCompressed && request.response) {\n            cMapData = new Uint8Array(request.response);\n          } else if (!this.isCompressed && request.responseText) {\n            cMapData = stringToBytes(request.responseText);\n          }\n          if (cMapData) {\n            resolve({ cMapData, compressionType });\n            return;\n          }\n        }\n        reject(new Error(request.statusText));\n      };\n\n      request.send(null);\n    }).catch(reason => {\n      throw new Error(\n        `Unable to load ${this.isCompressed ? \"binary \" : \"\"}` +\n          `CMap at: ${url}`\n      );\n    });\n  }\n}\n\nclass DOMSVGFactory {\n  create(width, height) {\n    assert(width > 0 && height > 0, \"Invalid SVG dimensions\");\n\n    const svg = document.createElementNS(SVG_NS, \"svg:svg\");\n    svg.setAttribute(\"version\", \"1.1\");\n    svg.setAttribute(\"width\", width + \"px\");\n    svg.setAttribute(\"height\", height + \"px\");\n    svg.setAttribute(\"preserveAspectRatio\", \"none\");\n    svg.setAttribute(\"viewBox\", \"0 0 \" + width + \" \" + height);\n\n    return svg;\n  }\n\n  createElement(type) {\n    assert(typeof type === \"string\", \"Invalid SVG element type\");\n\n    return document.createElementNS(SVG_NS, type);\n  }\n}\n\n/**\n * @typedef {Object} PageViewportParameters\n * @property {Array} viewBox - The xMin, yMin, xMax and yMax coordinates.\n * @property {number} scale - The scale of the viewport.\n * @property {number} rotation - The rotation, in degrees, of the viewport.\n * @property {number} [offsetX] - The horizontal, i.e. x-axis, offset. The\n *   default value is `0`.\n * @property {number} [offsetY] - The vertical, i.e. y-axis, offset. The\n *   default value is `0`.\n * @property {boolean} [dontFlip] - If true, the y-axis will not be flipped.\n *   The default value is `false`.\n */\n\n/**\n * @typedef {Object} PageViewportCloneParameters\n * @property {number} [scale] - The scale, overriding the one in the cloned\n *   viewport. The default value is `this.scale`.\n * @property {number} [rotation] - The rotation, in degrees, overriding the one\n *   in the cloned viewport. The default value is `this.rotation`.\n * @property {number} [offsetX] - The horizontal, i.e. x-axis, offset.\n *   The default value is `this.offsetX`.\n * @property {number} [offsetY] - The vertical, i.e. y-axis, offset.\n *   The default value is `this.offsetY`.\n * @property {boolean} [dontFlip] - If true, the x-axis will not be flipped.\n *   The default value is `false`.\n */\n\n/**\n * PDF page viewport created based on scale, rotation and offset.\n */\nclass PageViewport {\n  /**\n   * @param {PageViewportParameters}\n   */\n  constructor({\n    viewBox,\n    scale,\n    rotation,\n    offsetX = 0,\n    offsetY = 0,\n    dontFlip = false,\n  }) {\n    this.viewBox = viewBox;\n    this.scale = scale;\n    this.rotation = rotation;\n    this.offsetX = offsetX;\n    this.offsetY = offsetY;\n\n    // creating transform to convert pdf coordinate system to the normal\n    // canvas like coordinates taking in account scale and rotation\n    const centerX = (viewBox[2] + viewBox[0]) / 2;\n    const centerY = (viewBox[3] + viewBox[1]) / 2;\n    let rotateA, rotateB, rotateC, rotateD;\n    rotation = rotation % 360;\n    rotation = rotation < 0 ? rotation + 360 : rotation;\n    switch (rotation) {\n      case 180:\n        rotateA = -1;\n        rotateB = 0;\n        rotateC = 0;\n        rotateD = 1;\n        break;\n      case 90:\n        rotateA = 0;\n        rotateB = 1;\n        rotateC = 1;\n        rotateD = 0;\n        break;\n      case 270:\n        rotateA = 0;\n        rotateB = -1;\n        rotateC = -1;\n        rotateD = 0;\n        break;\n      case 0:\n        rotateA = 1;\n        rotateB = 0;\n        rotateC = 0;\n        rotateD = -1;\n        break;\n      default:\n        throw new Error(\n          \"PageViewport: Invalid rotation, must be a multiple of 90 degrees.\"\n        );\n    }\n\n    if (dontFlip) {\n      rotateC = -rotateC;\n      rotateD = -rotateD;\n    }\n\n    let offsetCanvasX, offsetCanvasY;\n    let width, height;\n    if (rotateA === 0) {\n      offsetCanvasX = Math.abs(centerY - viewBox[1]) * scale + offsetX;\n      offsetCanvasY = Math.abs(centerX - viewBox[0]) * scale + offsetY;\n      width = Math.abs(viewBox[3] - viewBox[1]) * scale;\n      height = Math.abs(viewBox[2] - viewBox[0]) * scale;\n    } else {\n      offsetCanvasX = Math.abs(centerX - viewBox[0]) * scale + offsetX;\n      offsetCanvasY = Math.abs(centerY - viewBox[1]) * scale + offsetY;\n      width = Math.abs(viewBox[2] - viewBox[0]) * scale;\n      height = Math.abs(viewBox[3] - viewBox[1]) * scale;\n    }\n    // creating transform for the following operations:\n    // translate(-centerX, -centerY), rotate and flip vertically,\n    // scale, and translate(offsetCanvasX, offsetCanvasY)\n    this.transform = [\n      rotateA * scale,\n      rotateB * scale,\n      rotateC * scale,\n      rotateD * scale,\n      offsetCanvasX - rotateA * scale * centerX - rotateC * scale * centerY,\n      offsetCanvasY - rotateB * scale * centerX - rotateD * scale * centerY,\n    ];\n\n    this.width = width;\n    this.height = height;\n  }\n\n  /**\n   * Clones viewport, with optional additional properties.\n   * @param {PageViewportCloneParameters} [params]\n   * @returns {PageViewport} Cloned viewport.\n   */\n  clone({\n    scale = this.scale,\n    rotation = this.rotation,\n    offsetX = this.offsetX,\n    offsetY = this.offsetY,\n    dontFlip = false,\n  } = {}) {\n    return new PageViewport({\n      viewBox: this.viewBox.slice(),\n      scale,\n      rotation,\n      offsetX,\n      offsetY,\n      dontFlip,\n    });\n  }\n\n  /**\n   * Converts PDF point to the viewport coordinates. For examples, useful for\n   * converting PDF location into canvas pixel coordinates.\n   * @param {number} x - The x-coordinate.\n   * @param {number} y - The y-coordinate.\n   * @returns {Object} Object containing `x` and `y` properties of the\n   *   point in the viewport coordinate space.\n   * @see {@link convertToPdfPoint}\n   * @see {@link convertToViewportRectangle}\n   */\n  convertToViewportPoint(x, y) {\n    return Util.applyTransform([x, y], this.transform);\n  }\n\n  /**\n   * Converts PDF rectangle to the viewport coordinates.\n   * @param {Array} rect - The xMin, yMin, xMax and yMax coordinates.\n   * @returns {Array} Array containing corresponding coordinates of the\n   *   rectangle in the viewport coordinate space.\n   * @see {@link convertToViewportPoint}\n   */\n  convertToViewportRectangle(rect) {\n    const topLeft = Util.applyTransform([rect[0], rect[1]], this.transform);\n    const bottomRight = Util.applyTransform([rect[2], rect[3]], this.transform);\n    return [topLeft[0], topLeft[1], bottomRight[0], bottomRight[1]];\n  }\n\n  /**\n   * Converts viewport coordinates to the PDF location. For examples, useful\n   * for converting canvas pixel location into PDF one.\n   * @param {number} x - The x-coordinate.\n   * @param {number} y - The y-coordinate.\n   * @returns {Object} Object containing `x` and `y` properties of the\n   *   point in the PDF coordinate space.\n   * @see {@link convertToViewportPoint}\n   */\n  convertToPdfPoint(x, y) {\n    return Util.applyInverseTransform([x, y], this.transform);\n  }\n}\n\nclass RenderingCancelledException extends BaseException {\n  constructor(msg, type) {\n    super(msg);\n    this.type = type;\n  }\n}\n\nconst LinkTarget = {\n  NONE: 0, // Default value.\n  SELF: 1,\n  BLANK: 2,\n  PARENT: 3,\n  TOP: 4,\n};\n\n/**\n * @typedef ExternalLinkParameters\n * @typedef {Object} ExternalLinkParameters\n * @property {string} url - An absolute URL.\n * @property {LinkTarget} [target] - The link target. The default value is\n *   `LinkTarget.NONE`.\n * @property {string} [rel] - The link relationship. The default value is\n *   `DEFAULT_LINK_REL`.\n * @property {boolean} [enabled] - Whether the link should be enabled. The\n *   default value is true.\n */\n\n/**\n * Adds various attributes (href, title, target, rel) to hyperlinks.\n * @param {HTMLLinkElement} link - The link element.\n * @param {ExternalLinkParameters} params\n */\nfunction addLinkAttributes(link, { url, target, rel, enabled = true } = {}) {\n  assert(\n    url && typeof url === \"string\",\n    'addLinkAttributes: A valid \"url\" parameter must provided.'\n  );\n\n  const urlNullRemoved = removeNullCharacters(url);\n  if (enabled) {\n    link.href = link.title = urlNullRemoved;\n  } else {\n    link.href = \"\";\n    link.title = `Disabled: ${urlNullRemoved}`;\n    link.onclick = () => {\n      return false;\n    };\n  }\n\n  let targetStr = \"\"; // LinkTarget.NONE\n  switch (target) {\n    case LinkTarget.NONE:\n      break;\n    case LinkTarget.SELF:\n      targetStr = \"_self\";\n      break;\n    case LinkTarget.BLANK:\n      targetStr = \"_blank\";\n      break;\n    case LinkTarget.PARENT:\n      targetStr = \"_parent\";\n      break;\n    case LinkTarget.TOP:\n      targetStr = \"_top\";\n      break;\n  }\n  link.target = targetStr;\n\n  link.rel = typeof rel === \"string\" ? rel : DEFAULT_LINK_REL;\n}\n\n// Gets the file name from a given URL.\nfunction getFilenameFromUrl(url) {\n  const anchor = url.indexOf(\"#\");\n  const query = url.indexOf(\"?\");\n  const end = Math.min(\n    anchor > 0 ? anchor : url.length,\n    query > 0 ? query : url.length\n  );\n  return url.substring(url.lastIndexOf(\"/\", end) + 1, end);\n}\n\nclass StatTimer {\n  constructor() {\n    this.started = Object.create(null);\n    this.times = [];\n  }\n\n  time(name) {\n    if (name in this.started) {\n      warn(`Timer is already running for ${name}`);\n    }\n    this.started[name] = Date.now();\n  }\n\n  timeEnd(name) {\n    if (!(name in this.started)) {\n      warn(`Timer has not been started for ${name}`);\n    }\n    this.times.push({\n      name,\n      start: this.started[name],\n      end: Date.now(),\n    });\n    // Remove timer from started so it can be called again.\n    delete this.started[name];\n  }\n\n  toString() {\n    // Find the longest name for padding purposes.\n    const outBuf = [];\n    let longest = 0;\n    for (const time of this.times) {\n      const name = time.name;\n      if (name.length > longest) {\n        longest = name.length;\n      }\n    }\n    for (const time of this.times) {\n      const duration = time.end - time.start;\n      outBuf.push(`${time.name.padEnd(longest)} ${duration}ms\\n`);\n    }\n    return outBuf.join(\"\");\n  }\n}\n\nfunction isFetchSupported() {\n  return (\n    typeof fetch !== \"undefined\" &&\n    typeof Response !== \"undefined\" &&\n    \"body\" in Response.prototype &&\n    typeof ReadableStream !== \"undefined\"\n  );\n}\n\nfunction isValidFetchUrl(url, baseUrl) {\n  try {\n    const { protocol } = baseUrl ? new URL(url, baseUrl) : new URL(url);\n    // The Fetch API only supports the http/https protocols, and not file/ftp.\n    return protocol === \"http:\" || protocol === \"https:\";\n  } catch (ex) {\n    return false; // `new URL()` will throw on incorrect data.\n  }\n}\n\nfunction loadScript(src) {\n  return new Promise((resolve, reject) => {\n    const script = document.createElement(\"script\");\n    script.src = src;\n\n    script.onload = resolve;\n    script.onerror = function () {\n      reject(new Error(`Cannot load script at: ${script.src}`));\n    };\n    (document.head || document.documentElement).appendChild(script);\n  });\n}\n\n// Deprecated API function -- display regardless of the `verbosity` setting.\nfunction deprecated(details) {\n  console.log(\"Deprecated API usage: \" + details);\n}\n\nlet pdfDateStringRegex;\n\nclass PDFDateString {\n  /**\n   * Convert a PDF date string to a JavaScript `Date` object.\n   *\n   * The PDF date string format is described in section 7.9.4 of the official\n   * PDF 32000-1:2008 specification. However, in the PDF 1.7 reference (sixth\n   * edition) Adobe describes the same format including a trailing apostrophe.\n   * This syntax in incorrect, but Adobe Acrobat creates PDF files that contain\n   * them. We ignore all apostrophes as they are not necessary for date parsing.\n   *\n   * Moreover, Adobe Acrobat doesn't handle changing the date to universal time\n   * and doesn't use the user's time zone (effectively ignoring the HH' and mm'\n   * parts of the date string).\n   *\n   * @param {string} input\n   * @returns {Date|null}\n   */\n  static toDateObject(input) {\n    if (!input || !isString(input)) {\n      return null;\n    }\n\n    // Lazily initialize the regular expression.\n    if (!pdfDateStringRegex) {\n      pdfDateStringRegex = new RegExp(\n        \"^D:\" + // Prefix (required)\n        \"(\\\\d{4})\" + // Year (required)\n        \"(\\\\d{2})?\" + // Month (optional)\n        \"(\\\\d{2})?\" + // Day (optional)\n        \"(\\\\d{2})?\" + // Hour (optional)\n        \"(\\\\d{2})?\" + // Minute (optional)\n        \"(\\\\d{2})?\" + // Second (optional)\n        \"([Z|+|-])?\" + // Universal time relation (optional)\n        \"(\\\\d{2})?\" + // Offset hour (optional)\n        \"'?\" + // Splitting apostrophe (optional)\n        \"(\\\\d{2})?\" + // Offset minute (optional)\n          \"'?\" // Trailing apostrophe (optional)\n      );\n    }\n\n    // Optional fields that don't satisfy the requirements from the regular\n    // expression (such as incorrect digit counts or numbers that are out of\n    // range) will fall back the defaults from the specification.\n    const matches = pdfDateStringRegex.exec(input);\n    if (!matches) {\n      return null;\n    }\n\n    // JavaScript's `Date` object expects the month to be between 0 and 11\n    // instead of 1 and 12, so we have to correct for that.\n    const year = parseInt(matches[1], 10);\n    let month = parseInt(matches[2], 10);\n    month = month >= 1 && month <= 12 ? month - 1 : 0;\n    let day = parseInt(matches[3], 10);\n    day = day >= 1 && day <= 31 ? day : 1;\n    let hour = parseInt(matches[4], 10);\n    hour = hour >= 0 && hour <= 23 ? hour : 0;\n    let minute = parseInt(matches[5], 10);\n    minute = minute >= 0 && minute <= 59 ? minute : 0;\n    let second = parseInt(matches[6], 10);\n    second = second >= 0 && second <= 59 ? second : 0;\n    const universalTimeRelation = matches[7] || \"Z\";\n    let offsetHour = parseInt(matches[8], 10);\n    offsetHour = offsetHour >= 0 && offsetHour <= 23 ? offsetHour : 0;\n    let offsetMinute = parseInt(matches[9], 10) || 0;\n    offsetMinute = offsetMinute >= 0 && offsetMinute <= 59 ? offsetMinute : 0;\n\n    // Universal time relation 'Z' means that the local time is equal to the\n    // universal time, whereas the relations '+'/'-' indicate that the local\n    // time is later respectively earlier than the universal time. Every date\n    // is normalized to universal time.\n    if (universalTimeRelation === \"-\") {\n      hour += offsetHour;\n      minute += offsetMinute;\n    } else if (universalTimeRelation === \"+\") {\n      hour -= offsetHour;\n      minute -= offsetMinute;\n    }\n\n    return new Date(Date.UTC(year, month, day, hour, minute, second));\n  }\n}\n\nexport {\n  PageViewport,\n  RenderingCancelledException,\n  addLinkAttributes,\n  getFilenameFromUrl,\n  LinkTarget,\n  DEFAULT_LINK_REL,\n  DOMCanvasFactory,\n  DOMCMapReaderFactory,\n  DOMSVGFactory,\n  StatTimer,\n  isFetchSupported,\n  isValidFetchUrl,\n  loadScript,\n  deprecated,\n  PDFDateString,\n};\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* eslint no-var: error */\n\nimport \"./compatibility.js\";\n\nconst IDENTITY_MATRIX = [1, 0, 0, 1, 0, 0];\nconst FONT_IDENTITY_MATRIX = [0.001, 0, 0, 0.001, 0, 0];\n\n// Permission flags from Table 22, Section 7.6.3.2 of the PDF specification.\nconst PermissionFlag = {\n  PRINT: 0x04,\n  MODIFY_CONTENTS: 0x08,\n  COPY: 0x10,\n  MODIFY_ANNOTATIONS: 0x20,\n  FILL_INTERACTIVE_FORMS: 0x100,\n  COPY_FOR_ACCESSIBILITY: 0x200,\n  ASSEMBLE: 0x400,\n  PRINT_HIGH_QUALITY: 0x800,\n};\n\nconst TextRenderingMode = {\n  FILL: 0,\n  STROKE: 1,\n  FILL_STROKE: 2,\n  INVISIBLE: 3,\n  FILL_ADD_TO_PATH: 4,\n  STROKE_ADD_TO_PATH: 5,\n  FILL_STROKE_ADD_TO_PATH: 6,\n  ADD_TO_PATH: 7,\n  FILL_STROKE_MASK: 3,\n  ADD_TO_PATH_FLAG: 4,\n};\n\nconst ImageKind = {\n  GRAYSCALE_1BPP: 1,\n  RGB_24BPP: 2,\n  RGBA_32BPP: 3,\n};\n\nconst AnnotationType = {\n  TEXT: 1,\n  LINK: 2,\n  FREETEXT: 3,\n  LINE: 4,\n  SQUARE: 5,\n  CIRCLE: 6,\n  POLYGON: 7,\n  POLYLINE: 8,\n  HIGHLIGHT: 9,\n  UNDERLINE: 10,\n  SQUIGGLY: 11,\n  STRIKEOUT: 12,\n  STAMP: 13,\n  CARET: 14,\n  INK: 15,\n  POPUP: 16,\n  FILEATTACHMENT: 17,\n  SOUND: 18,\n  MOVIE: 19,\n  WIDGET: 20,\n  SCREEN: 21,\n  PRINTERMARK: 22,\n  TRAPNET: 23,\n  WATERMARK: 24,\n  THREED: 25,\n  REDACT: 26,\n};\n\nconst AnnotationStateModelType = {\n  MARKED: \"Marked\",\n  REVIEW: \"Review\",\n};\n\nconst AnnotationMarkedState = {\n  MARKED: \"Marked\",\n  UNMARKED: \"Unmarked\",\n};\n\nconst AnnotationReviewState = {\n  ACCEPTED: \"Accepted\",\n  REJECTED: \"Rejected\",\n  CANCELLED: \"Cancelled\",\n  COMPLETED: \"Completed\",\n  NONE: \"None\",\n};\n\nconst AnnotationReplyType = {\n  GROUP: \"Group\",\n  REPLY: \"R\",\n};\n\nconst AnnotationFlag = {\n  INVISIBLE: 0x01,\n  HIDDEN: 0x02,\n  PRINT: 0x04,\n  NOZOOM: 0x08,\n  NOROTATE: 0x10,\n  NOVIEW: 0x20,\n  READONLY: 0x40,\n  LOCKED: 0x80,\n  TOGGLENOVIEW: 0x100,\n  LOCKEDCONTENTS: 0x200,\n};\n\nconst AnnotationFieldFlag = {\n  READONLY: 0x0000001,\n  REQUIRED: 0x0000002,\n  NOEXPORT: 0x0000004,\n  MULTILINE: 0x0001000,\n  PASSWORD: 0x0002000,\n  NOTOGGLETOOFF: 0x0004000,\n  RADIO: 0x0008000,\n  PUSHBUTTON: 0x0010000,\n  COMBO: 0x0020000,\n  EDIT: 0x0040000,\n  SORT: 0x0080000,\n  FILESELECT: 0x0100000,\n  MULTISELECT: 0x0200000,\n  DONOTSPELLCHECK: 0x0400000,\n  DONOTSCROLL: 0x0800000,\n  COMB: 0x1000000,\n  RICHTEXT: 0x2000000,\n  RADIOSINUNISON: 0x2000000,\n  COMMITONSELCHANGE: 0x4000000,\n};\n\nconst AnnotationBorderStyleType = {\n  SOLID: 1,\n  DASHED: 2,\n  BEVELED: 3,\n  INSET: 4,\n  UNDERLINE: 5,\n};\n\nconst StreamType = {\n  UNKNOWN: \"UNKNOWN\",\n  FLATE: \"FLATE\",\n  LZW: \"LZW\",\n  DCT: \"DCT\",\n  JPX: \"JPX\",\n  JBIG: \"JBIG\",\n  A85: \"A85\",\n  AHX: \"AHX\",\n  CCF: \"CCF\",\n  RLX: \"RLX\", // PDF short name is 'RL', but telemetry requires three chars.\n};\n\nconst FontType = {\n  UNKNOWN: \"UNKNOWN\",\n  TYPE1: \"TYPE1\",\n  TYPE1C: \"TYPE1C\",\n  CIDFONTTYPE0: \"CIDFONTTYPE0\",\n  CIDFONTTYPE0C: \"CIDFONTTYPE0C\",\n  TRUETYPE: \"TRUETYPE\",\n  CIDFONTTYPE2: \"CIDFONTTYPE2\",\n  TYPE3: \"TYPE3\",\n  OPENTYPE: \"OPENTYPE\",\n  TYPE0: \"TYPE0\",\n  MMTYPE1: \"MMTYPE1\",\n};\n\nconst VerbosityLevel = {\n  ERRORS: 0,\n  WARNINGS: 1,\n  INFOS: 5,\n};\n\nconst CMapCompressionType = {\n  NONE: 0,\n  BINARY: 1,\n  STREAM: 2,\n};\n\n// All the possible operations for an operator list.\nconst OPS = {\n  // Intentionally start from 1 so it is easy to spot bad operators that will be\n  // 0's.\n  dependency: 1,\n  setLineWidth: 2,\n  setLineCap: 3,\n  setLineJoin: 4,\n  setMiterLimit: 5,\n  setDash: 6,\n  setRenderingIntent: 7,\n  setFlatness: 8,\n  setGState: 9,\n  save: 10,\n  restore: 11,\n  transform: 12,\n  moveTo: 13,\n  lineTo: 14,\n  curveTo: 15,\n  curveTo2: 16,\n  curveTo3: 17,\n  closePath: 18,\n  rectangle: 19,\n  stroke: 20,\n  closeStroke: 21,\n  fill: 22,\n  eoFill: 23,\n  fillStroke: 24,\n  eoFillStroke: 25,\n  closeFillStroke: 26,\n  closeEOFillStroke: 27,\n  endPath: 28,\n  clip: 29,\n  eoClip: 30,\n  beginText: 31,\n  endText: 32,\n  setCharSpacing: 33,\n  setWordSpacing: 34,\n  setHScale: 35,\n  setLeading: 36,\n  setFont: 37,\n  setTextRenderingMode: 38,\n  setTextRise: 39,\n  moveText: 40,\n  setLeadingMoveText: 41,\n  setTextMatrix: 42,\n  nextLine: 43,\n  showText: 44,\n  showSpacedText: 45,\n  nextLineShowText: 46,\n  nextLineSetSpacingShowText: 47,\n  setCharWidth: 48,\n  setCharWidthAndBounds: 49,\n  setStrokeColorSpace: 50,\n  setFillColorSpace: 51,\n  setStrokeColor: 52,\n  setStrokeColorN: 53,\n  setFillColor: 54,\n  setFillColorN: 55,\n  setStrokeGray: 56,\n  setFillGray: 57,\n  setStrokeRGBColor: 58,\n  setFillRGBColor: 59,\n  setStrokeCMYKColor: 60,\n  setFillCMYKColor: 61,\n  shadingFill: 62,\n  beginInlineImage: 63,\n  beginImageData: 64,\n  endInlineImage: 65,\n  paintXObject: 66,\n  markPoint: 67,\n  markPointProps: 68,\n  beginMarkedContent: 69,\n  beginMarkedContentProps: 70,\n  endMarkedContent: 71,\n  beginCompat: 72,\n  endCompat: 73,\n  paintFormXObjectBegin: 74,\n  paintFormXObjectEnd: 75,\n  beginGroup: 76,\n  endGroup: 77,\n  beginAnnotations: 78,\n  endAnnotations: 79,\n  beginAnnotation: 80,\n  endAnnotation: 81,\n  paintJpegXObject: 82,\n  paintImageMaskXObject: 83,\n  paintImageMaskXObjectGroup: 84,\n  paintImageXObject: 85,\n  paintInlineImageXObject: 86,\n  paintInlineImageXObjectGroup: 87,\n  paintImageXObjectRepeat: 88,\n  paintImageMaskXObjectRepeat: 89,\n  paintSolidColorImageMask: 90,\n  constructPath: 91,\n};\n\nconst UNSUPPORTED_FEATURES = {\n  /** @deprecated unused */\n  unknown: \"unknown\",\n  forms: \"forms\",\n  javaScript: \"javaScript\",\n  smask: \"smask\",\n  shadingPattern: \"shadingPattern\",\n  /** @deprecated unused */\n  font: \"font\",\n  errorTilingPattern: \"errorTilingPattern\",\n  errorExtGState: \"errorExtGState\",\n  errorXObject: \"errorXObject\",\n  errorFontLoadType3: \"errorFontLoadType3\",\n  errorFontState: \"errorFontState\",\n  errorFontMissing: \"errorFontMissing\",\n  errorFontTranslate: \"errorFontTranslate\",\n  errorColorSpace: \"errorColorSpace\",\n  errorOperatorList: \"errorOperatorList\",\n  errorFontToUnicode: \"errorFontToUnicode\",\n  errorFontLoadNative: \"errorFontLoadNative\",\n  errorFontGetPath: \"errorFontGetPath\",\n};\n\nconst PasswordResponses = {\n  NEED_PASSWORD: 1,\n  INCORRECT_PASSWORD: 2,\n};\n\nlet verbosity = VerbosityLevel.WARNINGS;\n\nfunction setVerbosityLevel(level) {\n  if (Number.isInteger(level)) {\n    verbosity = level;\n  }\n}\n\nfunction getVerbosityLevel() {\n  return verbosity;\n}\n\n// A notice for devs. These are good for things that are helpful to devs, such\n// as warning that Workers were disabled, which is important to devs but not\n// end users.\nfunction info(msg) {\n  if (verbosity >= VerbosityLevel.INFOS) {\n    console.log(`Info: ${msg}`);\n  }\n}\n\n// Non-fatal warnings.\nfunction warn(msg) {\n  if (verbosity >= VerbosityLevel.WARNINGS) {\n    console.log(`Warning: ${msg}`);\n  }\n}\n\nfunction unreachable(msg) {\n  throw new Error(msg);\n}\n\nfunction assert(cond, msg) {\n  if (!cond) {\n    unreachable(msg);\n  }\n}\n\n// Checks if URLs have the same origin. For non-HTTP based URLs, returns false.\nfunction isSameOrigin(baseUrl, otherUrl) {\n  let base;\n  try {\n    base = new URL(baseUrl);\n    if (!base.origin || base.origin === \"null\") {\n      return false; // non-HTTP url\n    }\n  } catch (e) {\n    return false;\n  }\n\n  const other = new URL(otherUrl, base);\n  return base.origin === other.origin;\n}\n\n// Checks if URLs use one of the whitelisted protocols, e.g. to avoid XSS.\nfunction _isValidProtocol(url) {\n  if (!url) {\n    return false;\n  }\n  switch (url.protocol) {\n    case \"http:\":\n    case \"https:\":\n    case \"ftp:\":\n    case \"mailto:\":\n    case \"tel:\":\n      return true;\n    default:\n      return false;\n  }\n}\n\n/**\n * Attempts to create a valid absolute URL.\n *\n * @param {URL|string} url - An absolute, or relative, URL.\n * @param {URL|string} baseUrl - An absolute URL.\n * @returns Either a valid {URL}, or `null` otherwise.\n */\nfunction createValidAbsoluteUrl(url, baseUrl) {\n  if (!url) {\n    return null;\n  }\n  try {\n    const absoluteUrl = baseUrl ? new URL(url, baseUrl) : new URL(url);\n    if (_isValidProtocol(absoluteUrl)) {\n      return absoluteUrl;\n    }\n  } catch (ex) {\n    /* `new URL()` will throw on incorrect data. */\n  }\n  return null;\n}\n\nfunction shadow(obj, prop, value) {\n  Object.defineProperty(obj, prop, {\n    value,\n    enumerable: true,\n    configurable: true,\n    writable: false,\n  });\n  return value;\n}\n\nconst BaseException = (function BaseExceptionClosure() {\n  // eslint-disable-next-line no-shadow\n  function BaseException(message) {\n    if (this.constructor === BaseException) {\n      unreachable(\"Cannot initialize BaseException.\");\n    }\n    this.message = message;\n    this.name = this.constructor.name;\n  }\n  BaseException.prototype = new Error();\n  BaseException.constructor = BaseException;\n\n  return BaseException;\n})();\n\nclass PasswordException extends BaseException {\n  constructor(msg, code) {\n    super(msg);\n    this.code = code;\n  }\n}\n\nclass UnknownErrorException extends BaseException {\n  constructor(msg, details) {\n    super(msg);\n    this.details = details;\n  }\n}\n\nclass InvalidPDFException extends BaseException {}\n\nclass MissingPDFException extends BaseException {}\n\nclass UnexpectedResponseException extends BaseException {\n  constructor(msg, status) {\n    super(msg);\n    this.status = status;\n  }\n}\n\n/**\n * Error caused during parsing PDF data.\n */\nclass FormatError extends BaseException {}\n\n/**\n * Error used to indicate task cancellation.\n */\nclass AbortException extends BaseException {}\n\nconst NullCharactersRegExp = /\\x00/g;\n\nfunction removeNullCharacters(str) {\n  if (typeof str !== \"string\") {\n    warn(\"The argument for removeNullCharacters must be a string.\");\n    return str;\n  }\n  return str.replace(NullCharactersRegExp, \"\");\n}\n\nfunction bytesToString(bytes) {\n  assert(\n    bytes !== null && typeof bytes === \"object\" && bytes.length !== undefined,\n    \"Invalid argument for bytesToString\"\n  );\n  const length = bytes.length;\n  const MAX_ARGUMENT_COUNT = 8192;\n  if (length < MAX_ARGUMENT_COUNT) {\n    return String.fromCharCode.apply(null, bytes);\n  }\n  const strBuf = [];\n  for (let i = 0; i < length; i += MAX_ARGUMENT_COUNT) {\n    const chunkEnd = Math.min(i + MAX_ARGUMENT_COUNT, length);\n    const chunk = bytes.subarray(i, chunkEnd);\n    strBuf.push(String.fromCharCode.apply(null, chunk));\n  }\n  return strBuf.join(\"\");\n}\n\nfunction stringToBytes(str) {\n  assert(typeof str === \"string\", \"Invalid argument for stringToBytes\");\n  const length = str.length;\n  const bytes = new Uint8Array(length);\n  for (let i = 0; i < length; ++i) {\n    bytes[i] = str.charCodeAt(i) & 0xff;\n  }\n  return bytes;\n}\n\n/**\n * Gets length of the array (Array, Uint8Array, or string) in bytes.\n * @param {Array|Uint8Array|string} arr\n * @returns {number}\n */\nfunction arrayByteLength(arr) {\n  if (arr.length !== undefined) {\n    return arr.length;\n  }\n  assert(arr.byteLength !== undefined, \"arrayByteLength - invalid argument.\");\n  return arr.byteLength;\n}\n\n/**\n * Combines array items (arrays) into single Uint8Array object.\n * @param {Array} arr - the array of the arrays (Array, Uint8Array, or string).\n * @returns {Uint8Array}\n */\nfunction arraysToBytes(arr) {\n  const length = arr.length;\n  // Shortcut: if first and only item is Uint8Array, return it.\n  if (length === 1 && arr[0] instanceof Uint8Array) {\n    return arr[0];\n  }\n  let resultLength = 0;\n  for (let i = 0; i < length; i++) {\n    resultLength += arrayByteLength(arr[i]);\n  }\n  let pos = 0;\n  const data = new Uint8Array(resultLength);\n  for (let i = 0; i < length; i++) {\n    let item = arr[i];\n    if (!(item instanceof Uint8Array)) {\n      if (typeof item === \"string\") {\n        item = stringToBytes(item);\n      } else {\n        item = new Uint8Array(item);\n      }\n    }\n    const itemLength = item.byteLength;\n    data.set(item, pos);\n    pos += itemLength;\n  }\n  return data;\n}\n\nfunction string32(value) {\n  return String.fromCharCode(\n    (value >> 24) & 0xff,\n    (value >> 16) & 0xff,\n    (value >> 8) & 0xff,\n    value & 0xff\n  );\n}\n\n// Checks the endianness of the platform.\nfunction isLittleEndian() {\n  const buffer8 = new Uint8Array(4);\n  buffer8[0] = 1;\n  const view32 = new Uint32Array(buffer8.buffer, 0, 1);\n  return view32[0] === 1;\n}\nconst IsLittleEndianCached = {\n  get value() {\n    return shadow(this, \"value\", isLittleEndian());\n  },\n};\n\n// Checks if it's possible to eval JS expressions.\nfunction isEvalSupported() {\n  try {\n    new Function(\"\"); // eslint-disable-line no-new, no-new-func\n    return true;\n  } catch (e) {\n    return false;\n  }\n}\nconst IsEvalSupportedCached = {\n  get value() {\n    return shadow(this, \"value\", isEvalSupported());\n  },\n};\n\nconst rgbBuf = [\"rgb(\", 0, \",\", 0, \",\", 0, \")\"];\n\nclass Util {\n  // makeCssRgb() can be called thousands of times. Using ´rgbBuf` avoids\n  // creating many intermediate strings.\n  static makeCssRgb(r, g, b) {\n    rgbBuf[1] = r;\n    rgbBuf[3] = g;\n    rgbBuf[5] = b;\n    return rgbBuf.join(\"\");\n  }\n\n  // Concatenates two transformation matrices together and returns the result.\n  static transform(m1, m2) {\n    return [\n      m1[0] * m2[0] + m1[2] * m2[1],\n      m1[1] * m2[0] + m1[3] * m2[1],\n      m1[0] * m2[2] + m1[2] * m2[3],\n      m1[1] * m2[2] + m1[3] * m2[3],\n      m1[0] * m2[4] + m1[2] * m2[5] + m1[4],\n      m1[1] * m2[4] + m1[3] * m2[5] + m1[5],\n    ];\n  }\n\n  // For 2d affine transforms\n  static applyTransform(p, m) {\n    const xt = p[0] * m[0] + p[1] * m[2] + m[4];\n    const yt = p[0] * m[1] + p[1] * m[3] + m[5];\n    return [xt, yt];\n  }\n\n  static applyInverseTransform(p, m) {\n    const d = m[0] * m[3] - m[1] * m[2];\n    const xt = (p[0] * m[3] - p[1] * m[2] + m[2] * m[5] - m[4] * m[3]) / d;\n    const yt = (-p[0] * m[1] + p[1] * m[0] + m[4] * m[1] - m[5] * m[0]) / d;\n    return [xt, yt];\n  }\n\n  // Applies the transform to the rectangle and finds the minimum axially\n  // aligned bounding box.\n  static getAxialAlignedBoundingBox(r, m) {\n    const p1 = Util.applyTransform(r, m);\n    const p2 = Util.applyTransform(r.slice(2, 4), m);\n    const p3 = Util.applyTransform([r[0], r[3]], m);\n    const p4 = Util.applyTransform([r[2], r[1]], m);\n    return [\n      Math.min(p1[0], p2[0], p3[0], p4[0]),\n      Math.min(p1[1], p2[1], p3[1], p4[1]),\n      Math.max(p1[0], p2[0], p3[0], p4[0]),\n      Math.max(p1[1], p2[1], p3[1], p4[1]),\n    ];\n  }\n\n  static inverseTransform(m) {\n    const d = m[0] * m[3] - m[1] * m[2];\n    return [\n      m[3] / d,\n      -m[1] / d,\n      -m[2] / d,\n      m[0] / d,\n      (m[2] * m[5] - m[4] * m[3]) / d,\n      (m[4] * m[1] - m[5] * m[0]) / d,\n    ];\n  }\n\n  // Apply a generic 3d matrix M on a 3-vector v:\n  //   | a b c |   | X |\n  //   | d e f | x | Y |\n  //   | g h i |   | Z |\n  // M is assumed to be serialized as [a,b,c,d,e,f,g,h,i],\n  // with v as [X,Y,Z]\n  static apply3dTransform(m, v) {\n    return [\n      m[0] * v[0] + m[1] * v[1] + m[2] * v[2],\n      m[3] * v[0] + m[4] * v[1] + m[5] * v[2],\n      m[6] * v[0] + m[7] * v[1] + m[8] * v[2],\n    ];\n  }\n\n  // This calculation uses Singular Value Decomposition.\n  // The SVD can be represented with formula A = USV. We are interested in the\n  // matrix S here because it represents the scale values.\n  static singularValueDecompose2dScale(m) {\n    const transpose = [m[0], m[2], m[1], m[3]];\n\n    // Multiply matrix m with its transpose.\n    const a = m[0] * transpose[0] + m[1] * transpose[2];\n    const b = m[0] * transpose[1] + m[1] * transpose[3];\n    const c = m[2] * transpose[0] + m[3] * transpose[2];\n    const d = m[2] * transpose[1] + m[3] * transpose[3];\n\n    // Solve the second degree polynomial to get roots.\n    const first = (a + d) / 2;\n    const second = Math.sqrt((a + d) * (a + d) - 4 * (a * d - c * b)) / 2;\n    const sx = first + second || 1;\n    const sy = first - second || 1;\n\n    // Scale values are the square roots of the eigenvalues.\n    return [Math.sqrt(sx), Math.sqrt(sy)];\n  }\n\n  // Normalize rectangle rect=[x1, y1, x2, y2] so that (x1,y1) < (x2,y2)\n  // For coordinate systems whose origin lies in the bottom-left, this\n  // means normalization to (BL,TR) ordering. For systems with origin in the\n  // top-left, this means (TL,BR) ordering.\n  static normalizeRect(rect) {\n    const r = rect.slice(0); // clone rect\n    if (rect[0] > rect[2]) {\n      r[0] = rect[2];\n      r[2] = rect[0];\n    }\n    if (rect[1] > rect[3]) {\n      r[1] = rect[3];\n      r[3] = rect[1];\n    }\n    return r;\n  }\n\n  // Returns a rectangle [x1, y1, x2, y2] corresponding to the\n  // intersection of rect1 and rect2. If no intersection, returns 'false'\n  // The rectangle coordinates of rect1, rect2 should be [x1, y1, x2, y2]\n  static intersect(rect1, rect2) {\n    function compare(a, b) {\n      return a - b;\n    }\n\n    // Order points along the axes\n    const orderedX = [rect1[0], rect1[2], rect2[0], rect2[2]].sort(compare);\n    const orderedY = [rect1[1], rect1[3], rect2[1], rect2[3]].sort(compare);\n    const result = [];\n\n    rect1 = Util.normalizeRect(rect1);\n    rect2 = Util.normalizeRect(rect2);\n\n    // X: first and second points belong to different rectangles?\n    if (\n      (orderedX[0] === rect1[0] && orderedX[1] === rect2[0]) ||\n      (orderedX[0] === rect2[0] && orderedX[1] === rect1[0])\n    ) {\n      // Intersection must be between second and third points\n      result[0] = orderedX[1];\n      result[2] = orderedX[2];\n    } else {\n      return null;\n    }\n\n    // Y: first and second points belong to different rectangles?\n    if (\n      (orderedY[0] === rect1[1] && orderedY[1] === rect2[1]) ||\n      (orderedY[0] === rect2[1] && orderedY[1] === rect1[1])\n    ) {\n      // Intersection must be between second and third points\n      result[1] = orderedY[1];\n      result[3] = orderedY[2];\n    } else {\n      return null;\n    }\n\n    return result;\n  }\n}\n\n// prettier-ignore\nconst PDFStringTranslateTable = [\n  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,\n  0x2D8, 0x2C7, 0x2C6, 0x2D9, 0x2DD, 0x2DB, 0x2DA, 0x2DC, 0, 0, 0, 0, 0, 0, 0,\n  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,\n  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,\n  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,\n  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x2022, 0x2020, 0x2021, 0x2026, 0x2014,\n  0x2013, 0x192, 0x2044, 0x2039, 0x203A, 0x2212, 0x2030, 0x201E, 0x201C,\n  0x201D, 0x2018, 0x2019, 0x201A, 0x2122, 0xFB01, 0xFB02, 0x141, 0x152, 0x160,\n  0x178, 0x17D, 0x131, 0x142, 0x153, 0x161, 0x17E, 0, 0x20AC\n];\n\nfunction stringToPDFString(str) {\n  const length = str.length,\n    strBuf = [];\n  if (str[0] === \"\\xFE\" && str[1] === \"\\xFF\") {\n    // UTF16BE BOM\n    for (let i = 2; i < length; i += 2) {\n      strBuf.push(\n        String.fromCharCode((str.charCodeAt(i) << 8) | str.charCodeAt(i + 1))\n      );\n    }\n  } else if (str[0] === \"\\xFF\" && str[1] === \"\\xFE\") {\n    // UTF16LE BOM\n    for (let i = 2; i < length; i += 2) {\n      strBuf.push(\n        String.fromCharCode((str.charCodeAt(i + 1) << 8) | str.charCodeAt(i))\n      );\n    }\n  } else {\n    for (let i = 0; i < length; ++i) {\n      const code = PDFStringTranslateTable[str.charCodeAt(i)];\n      strBuf.push(code ? String.fromCharCode(code) : str.charAt(i));\n    }\n  }\n  return strBuf.join(\"\");\n}\n\nfunction stringToUTF8String(str) {\n  return decodeURIComponent(escape(str));\n}\n\nfunction utf8StringToString(str) {\n  return unescape(encodeURIComponent(str));\n}\n\nfunction isEmptyObj(obj) {\n  for (const key in obj) {\n    return false;\n  }\n  return true;\n}\n\nfunction isBool(v) {\n  return typeof v === \"boolean\";\n}\n\nfunction isNum(v) {\n  return typeof v === \"number\";\n}\n\nfunction isString(v) {\n  return typeof v === \"string\";\n}\n\nfunction isArrayBuffer(v) {\n  return typeof v === \"object\" && v !== null && v.byteLength !== undefined;\n}\n\nfunction isArrayEqual(arr1, arr2) {\n  if (arr1.length !== arr2.length) {\n    return false;\n  }\n  return arr1.every(function (element, index) {\n    return element === arr2[index];\n  });\n}\n\n/**\n * Promise Capability object.\n *\n * @typedef {Object} PromiseCapability\n * @property {Promise} promise - A Promise object.\n * @property {boolean} settled - If the Promise has been fulfilled/rejected.\n * @property {function} resolve - Fulfills the Promise.\n * @property {function} reject - Rejects the Promise.\n */\n\n/**\n * Creates a promise capability object.\n * @alias createPromiseCapability\n *\n * @returns {PromiseCapability}\n */\nfunction createPromiseCapability() {\n  const capability = Object.create(null);\n  let isSettled = false;\n\n  Object.defineProperty(capability, \"settled\", {\n    get() {\n      return isSettled;\n    },\n  });\n  capability.promise = new Promise(function (resolve, reject) {\n    capability.resolve = function (data) {\n      isSettled = true;\n      resolve(data);\n    };\n    capability.reject = function (reason) {\n      isSettled = true;\n      reject(reason);\n    };\n  });\n  return capability;\n}\n\nconst createObjectURL = (function createObjectURLClosure() {\n  // Blob/createObjectURL is not available, falling back to data schema.\n  const digits =\n    \"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\";\n\n  // eslint-disable-next-line no-shadow\n  return function createObjectURL(data, contentType, forceDataSchema = false) {\n    if (!forceDataSchema && URL.createObjectURL) {\n      const blob = new Blob([data], { type: contentType });\n      return URL.createObjectURL(blob);\n    }\n\n    let buffer = `data:${contentType};base64,`;\n    for (let i = 0, ii = data.length; i < ii; i += 3) {\n      const b1 = data[i] & 0xff;\n      const b2 = data[i + 1] & 0xff;\n      const b3 = data[i + 2] & 0xff;\n      const d1 = b1 >> 2,\n        d2 = ((b1 & 3) << 4) | (b2 >> 4);\n      const d3 = i + 1 < ii ? ((b2 & 0xf) << 2) | (b3 >> 6) : 64;\n      const d4 = i + 2 < ii ? b3 & 0x3f : 64;\n      buffer += digits[d1] + digits[d2] + digits[d3] + digits[d4];\n    }\n    return buffer;\n  };\n})();\n\nexport {\n  BaseException,\n  FONT_IDENTITY_MATRIX,\n  IDENTITY_MATRIX,\n  OPS,\n  VerbosityLevel,\n  UNSUPPORTED_FEATURES,\n  AnnotationBorderStyleType,\n  AnnotationFieldFlag,\n  AnnotationFlag,\n  AnnotationMarkedState,\n  AnnotationReplyType,\n  AnnotationReviewState,\n  AnnotationStateModelType,\n  AnnotationType,\n  FontType,\n  ImageKind,\n  CMapCompressionType,\n  AbortException,\n  InvalidPDFException,\n  MissingPDFException,\n  PasswordException,\n  PasswordResponses,\n  PermissionFlag,\n  StreamType,\n  TextRenderingMode,\n  UnexpectedResponseException,\n  UnknownErrorException,\n  Util,\n  FormatError,\n  arrayByteLength,\n  arraysToBytes,\n  assert,\n  bytesToString,\n  createPromiseCapability,\n  createObjectURL,\n  getVerbosityLevel,\n  info,\n  isArrayBuffer,\n  isArrayEqual,\n  isBool,\n  isEmptyObj,\n  isNum,\n  isString,\n  isSameOrigin,\n  createValidAbsoluteUrl,\n  IsLittleEndianCached,\n  IsEvalSupportedCached,\n  removeNullCharacters,\n  setVerbosityLevel,\n  shadow,\n  string32,\n  stringToBytes,\n  stringToPDFString,\n  stringToUTF8String,\n  utf8StringToString,\n  warn,\n  unreachable,\n};\n","/* Copyright 2017 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* eslint no-var: error */\n\nimport { isNodeJS } from \"./is_node.js\";\n\n// Skip compatibility checks for modern builds and if we already ran the module.\nif (\n  (typeof PDFJSDev === \"undefined\" || !PDFJSDev.test(\"SKIP_BABEL\")) &&\n  (typeof globalThis === \"undefined\" || !globalThis._pdfjsCompatibilityChecked)\n) {\n  // Provides support for globalThis in legacy browsers.\n  // Support: IE11/Edge, Opera\n  if (typeof globalThis === \"undefined\" || globalThis.Math !== Math) {\n    // eslint-disable-next-line no-global-assign\n    globalThis = require(\"core-js/es/global-this\");\n  }\n  globalThis._pdfjsCompatibilityChecked = true;\n\n  const hasDOM = typeof window === \"object\" && typeof document === \"object\";\n  const userAgent =\n    (typeof navigator !== \"undefined\" && navigator.userAgent) || \"\";\n  const isIE = /Trident/.test(userAgent);\n\n  // Support: Node.js\n  (function checkNodeBtoa() {\n    if (globalThis.btoa || !isNodeJS) {\n      return;\n    }\n    globalThis.btoa = function (chars) {\n      // eslint-disable-next-line no-undef\n      return Buffer.from(chars, \"binary\").toString(\"base64\");\n    };\n  })();\n\n  // Support: Node.js\n  (function checkNodeAtob() {\n    if (globalThis.atob || !isNodeJS) {\n      return;\n    }\n    globalThis.atob = function (input) {\n      // eslint-disable-next-line no-undef\n      return Buffer.from(input, \"base64\").toString(\"binary\");\n    };\n  })();\n\n  // Provides support for ChildNode.remove in legacy browsers.\n  // Support: IE.\n  (function checkChildNodeRemove() {\n    if (!hasDOM) {\n      return;\n    }\n    if (typeof Element.prototype.remove !== \"undefined\") {\n      return;\n    }\n    Element.prototype.remove = function () {\n      if (this.parentNode) {\n        // eslint-disable-next-line mozilla/avoid-removeChild\n        this.parentNode.removeChild(this);\n      }\n    };\n  })();\n\n  // Provides support for DOMTokenList.prototype.{add, remove}, with more than\n  // one parameter, in legacy browsers.\n  // Support: IE\n  (function checkDOMTokenListAddRemove() {\n    if (!hasDOM || isNodeJS) {\n      return;\n    }\n    const div = document.createElement(\"div\");\n    div.classList.add(\"testOne\", \"testTwo\");\n\n    if (\n      div.classList.contains(\"testOne\") === true &&\n      div.classList.contains(\"testTwo\") === true\n    ) {\n      return;\n    }\n    const OriginalDOMTokenListAdd = DOMTokenList.prototype.add;\n    const OriginalDOMTokenListRemove = DOMTokenList.prototype.remove;\n\n    DOMTokenList.prototype.add = function (...tokens) {\n      for (const token of tokens) {\n        OriginalDOMTokenListAdd.call(this, token);\n      }\n    };\n    DOMTokenList.prototype.remove = function (...tokens) {\n      for (const token of tokens) {\n        OriginalDOMTokenListRemove.call(this, token);\n      }\n    };\n  })();\n\n  // Provides support for DOMTokenList.prototype.toggle, with the optional\n  // \"force\" parameter, in legacy browsers.\n  // Support: IE\n  (function checkDOMTokenListToggle() {\n    if (!hasDOM || isNodeJS) {\n      return;\n    }\n    const div = document.createElement(\"div\");\n    if (div.classList.toggle(\"test\", 0) === false) {\n      return;\n    }\n\n    DOMTokenList.prototype.toggle = function (token) {\n      const force =\n        arguments.length > 1 ? !!arguments[1] : !this.contains(token);\n      return this[force ? \"add\" : \"remove\"](token), force;\n    };\n  })();\n\n  // Provides support for window.history.{pushState, replaceState}, with the\n  // `url` parameter set to `undefined`, without breaking the document URL.\n  // Support: IE\n  (function checkWindowHistoryPushStateReplaceState() {\n    if (!hasDOM || !isIE) {\n      return;\n    }\n    const OriginalPushState = window.history.pushState;\n    const OriginalReplaceState = window.history.replaceState;\n\n    window.history.pushState = function (state, title, url) {\n      const args = url === undefined ? [state, title] : [state, title, url];\n      OriginalPushState.apply(this, args);\n    };\n    window.history.replaceState = function (state, title, url) {\n      const args = url === undefined ? [state, title] : [state, title, url];\n      OriginalReplaceState.apply(this, args);\n    };\n  })();\n\n  // Provides support for String.prototype.startsWith in legacy browsers.\n  // Support: IE, Chrome<41\n  (function checkStringStartsWith() {\n    if (String.prototype.startsWith) {\n      return;\n    }\n    require(\"core-js/es/string/starts-with.js\");\n  })();\n\n  // Provides support for String.prototype.endsWith in legacy browsers.\n  // Support: IE, Chrome<41\n  (function checkStringEndsWith() {\n    if (String.prototype.endsWith) {\n      return;\n    }\n    require(\"core-js/es/string/ends-with.js\");\n  })();\n\n  // Provides support for String.prototype.includes in legacy browsers.\n  // Support: IE, Chrome<41\n  (function checkStringIncludes() {\n    if (String.prototype.includes) {\n      return;\n    }\n    require(\"core-js/es/string/includes.js\");\n  })();\n\n  // Provides support for Array.prototype.includes in legacy browsers.\n  // Support: IE, Chrome<47\n  (function checkArrayIncludes() {\n    if (Array.prototype.includes) {\n      return;\n    }\n    require(\"core-js/es/array/includes.js\");\n  })();\n\n  // Provides support for Array.from in legacy browsers.\n  // Support: IE\n  (function checkArrayFrom() {\n    if (Array.from) {\n      return;\n    }\n    require(\"core-js/es/array/from.js\");\n  })();\n\n  // Provides support for Object.assign in legacy browsers.\n  // Support: IE\n  (function checkObjectAssign() {\n    if (Object.assign) {\n      return;\n    }\n    require(\"core-js/es/object/assign.js\");\n  })();\n\n  // Provides support for Math.log2 in legacy browsers.\n  // Support: IE, Chrome<38\n  (function checkMathLog2() {\n    if (Math.log2) {\n      return;\n    }\n    Math.log2 = require(\"core-js/es/math/log2.js\");\n  })();\n\n  // Provides support for Number.isNaN in legacy browsers.\n  // Support: IE.\n  (function checkNumberIsNaN() {\n    if (Number.isNaN) {\n      return;\n    }\n    Number.isNaN = require(\"core-js/es/number/is-nan.js\");\n  })();\n\n  // Provides support for Number.isInteger in legacy browsers.\n  // Support: IE, Chrome<34\n  (function checkNumberIsInteger() {\n    if (Number.isInteger) {\n      return;\n    }\n    Number.isInteger = require(\"core-js/es/number/is-integer.js\");\n  })();\n\n  // Provides support for TypedArray.prototype.slice in legacy browsers.\n  // Support: IE\n  (function checkTypedArraySlice() {\n    if (Uint8Array.prototype.slice) {\n      return;\n    }\n    require(\"core-js/es/typed-array/slice\");\n  })();\n\n  // Support: IE, Safari<11, Chrome<63\n  (function checkPromise() {\n    if (typeof PDFJSDev !== \"undefined\" && PDFJSDev.test(\"IMAGE_DECODERS\")) {\n      // The current image decoders are synchronous, hence `Promise` shouldn't\n      // need to be polyfilled for the IMAGE_DECODERS build target.\n      return;\n    }\n    if (globalThis.Promise && globalThis.Promise.allSettled) {\n      return;\n    }\n    globalThis.Promise = require(\"core-js/es/promise/index.js\");\n  })();\n\n  // Support: IE\n  (function checkURL() {\n    if (typeof PDFJSDev === \"undefined\" || !PDFJSDev.test(\"PRODUCTION\")) {\n      // Prevent \"require is not a function\" errors in development mode,\n      // since the `URL` constructor should be available in modern browers.\n      return;\n    } else if (!PDFJSDev.test(\"GENERIC\")) {\n      // The `URL` constructor is assumed to be available in the extension\n      // builds.\n      return;\n    } else if (PDFJSDev.test(\"IMAGE_DECODERS\")) {\n      // The current image decoders don't use the `URL` constructor, so it\n      // doesn't need to be polyfilled for the IMAGE_DECODERS build target.\n      return;\n    }\n    globalThis.URL = require(\"core-js/web/url.js\");\n  })();\n\n  // Support: IE, Node.js\n  (function checkReadableStream() {\n    if (typeof PDFJSDev !== \"undefined\" && PDFJSDev.test(\"IMAGE_DECODERS\")) {\n      // The current image decoders are synchronous, hence `ReadableStream`\n      // shouldn't need to be polyfilled for the IMAGE_DECODERS build target.\n      return;\n    }\n    let isReadableStreamSupported = false;\n\n    if (typeof ReadableStream !== \"undefined\") {\n      // MS Edge may say it has ReadableStream but they are not up to spec yet.\n      try {\n        // eslint-disable-next-line no-new\n        new ReadableStream({\n          start(controller) {\n            controller.close();\n          },\n        });\n        isReadableStreamSupported = true;\n      } catch (e) {\n        // The ReadableStream constructor cannot be used.\n      }\n    }\n    if (isReadableStreamSupported) {\n      return;\n    }\n    globalThis.ReadableStream = require(\"web-streams-polyfill/dist/ponyfill.js\").ReadableStream;\n  })();\n\n  // We want to support Map iteration, but it doesn't seem possible to easily\n  // test for that specifically; hence using a similarly unsupported property.\n  // Support: IE11\n  (function checkMapEntries() {\n    if (globalThis.Map && globalThis.Map.prototype.entries) {\n      return;\n    }\n    globalThis.Map = require(\"core-js/es/map/index.js\");\n  })();\n\n  // We want to support Set iteration, but it doesn't seem possible to easily\n  // test for that specifically; hence using a similarly unsupported property.\n  // Support: IE11\n  (function checkSetEntries() {\n    if (globalThis.Set && globalThis.Set.prototype.entries) {\n      return;\n    }\n    globalThis.Set = require(\"core-js/es/set/index.js\");\n  })();\n\n  // Support: IE<11, Safari<8, Chrome<36\n  (function checkWeakMap() {\n    if (globalThis.WeakMap) {\n      return;\n    }\n    globalThis.WeakMap = require(\"core-js/es/weak-map/index.js\");\n  })();\n\n  // Support: IE11\n  (function checkWeakSet() {\n    if (globalThis.WeakSet) {\n      return;\n    }\n    globalThis.WeakSet = require(\"core-js/es/weak-set/index.js\");\n  })();\n\n  // Provides support for String.codePointAt in legacy browsers.\n  // Support: IE11.\n  (function checkStringCodePointAt() {\n    if (String.prototype.codePointAt) {\n      return;\n    }\n    require(\"core-js/es/string/code-point-at.js\");\n  })();\n\n  // Provides support for String.fromCodePoint in legacy browsers.\n  // Support: IE11.\n  (function checkStringFromCodePoint() {\n    if (String.fromCodePoint) {\n      return;\n    }\n    String.fromCodePoint = require(\"core-js/es/string/from-code-point.js\");\n  })();\n\n  // Support: IE\n  (function checkSymbol() {\n    if (globalThis.Symbol) {\n      return;\n    }\n    require(\"core-js/es/symbol/index.js\");\n  })();\n\n  // Provides support for String.prototype.padStart in legacy browsers.\n  // Support: IE, Chrome<57\n  (function checkStringPadStart() {\n    if (String.prototype.padStart) {\n      return;\n    }\n    require(\"core-js/es/string/pad-start.js\");\n  })();\n\n  // Provides support for String.prototype.padEnd in legacy browsers.\n  // Support: IE, Chrome<57\n  (function checkStringPadEnd() {\n    if (String.prototype.padEnd) {\n      return;\n    }\n    require(\"core-js/es/string/pad-end.js\");\n  })();\n\n  // Provides support for Object.values in legacy browsers.\n  // Support: IE, Chrome<54\n  (function checkObjectValues() {\n    if (Object.values) {\n      return;\n    }\n    Object.values = require(\"core-js/es/object/values.js\");\n  })();\n}\n","/* Copyright 2018 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* globals process */\n\n// NW.js / Electron is a browser context, but copies some Node.js objects; see\n// http://docs.nwjs.io/en/latest/For%20Users/Advanced/JavaScript%20Contexts%20in%20NW.js/#access-nodejs-and-nwjs-api-in-browser-context\n// https://electronjs.org/docs/api/process#processversionselectron\nconst isNodeJS =\n  typeof process === \"object\" &&\n  process + \"\" === \"[object process]\" &&\n  !process.versions.nw &&\n  !process.versions.electron;\n\nexport { isNodeJS };\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* eslint no-var: error */\n\n/**\n * @module pdfjsLib\n */\n\nimport {\n  AbortException,\n  assert,\n  createPromiseCapability,\n  getVerbosityLevel,\n  info,\n  InvalidPDFException,\n  isArrayBuffer,\n  isSameOrigin,\n  MissingPDFException,\n  PasswordException,\n  setVerbosityLevel,\n  shadow,\n  stringToBytes,\n  UnexpectedResponseException,\n  UnknownErrorException,\n  unreachable,\n  warn,\n} from \"../shared/util.js\";\nimport {\n  deprecated,\n  DOMCanvasFactory,\n  DOMCMapReaderFactory,\n  loadScript,\n  PageViewport,\n  RenderingCancelledException,\n  StatTimer,\n} from \"./display_utils.js\";\nimport { FontFaceObject, FontLoader } from \"./font_loader.js\";\nimport { apiCompatibilityParams } from \"./api_compatibility.js\";\nimport { CanvasGraphics } from \"./canvas.js\";\nimport { GlobalWorkerOptions } from \"./worker_options.js\";\nimport { isNodeJS } from \"../shared/is_node.js\";\nimport { MessageHandler } from \"../shared/message_handler.js\";\nimport { Metadata } from \"./metadata.js\";\nimport { PDFDataTransportStream } from \"./transport_stream.js\";\nimport { WebGLContext } from \"./webgl.js\";\n\nconst DEFAULT_RANGE_CHUNK_SIZE = 65536; // 2^16 = 65536\nconst RENDERING_CANCELLED_TIMEOUT = 100; // ms\n\n/**\n * @typedef {function} IPDFStreamFactory\n * @param {DocumentInitParameters} params - The document initialization\n *   parameters. The \"url\" key is always present.\n * @returns {Promise} A promise, which is resolved with an instance of\n *   {IPDFStream}.\n * @ignore\n */\n\n/**\n * @type IPDFStreamFactory\n * @private\n */\nlet createPDFNetworkStream;\n\n/**\n * Sets the function that instantiates an {IPDFStream} as an alternative PDF\n * data transport.\n * @param {IPDFStreamFactory} pdfNetworkStreamFactory - The factory function\n *   that takes document initialization parameters (including a \"url\") and\n *   returns a promise which is resolved with an instance of {IPDFStream}.\n * @ignore\n */\nfunction setPDFNetworkStreamFactory(pdfNetworkStreamFactory) {\n  createPDFNetworkStream = pdfNetworkStreamFactory;\n}\n\n/**\n * Document initialization / loading parameters object.\n *\n * @typedef {Object} DocumentInitParameters\n * @property {string}     [url] - The URL of the PDF.\n * @property {TypedArray|Array|string} [data] - Binary PDF data. Use typed\n *    arrays (Uint8Array) to improve the memory usage. If PDF data is\n *    BASE64-encoded, use atob() to convert it to a binary string first.\n * @property {Object}     [httpHeaders] - Basic authentication headers.\n * @property {boolean}    [withCredentials] - Indicates whether or not\n *   cross-site Access-Control requests should be made using credentials such\n *   as cookies or authorization headers. The default is false.\n * @property {string}     [password] - For decrypting password-protected PDFs.\n * @property {TypedArray} [initialData] - A typed array with the first portion\n *   or all of the pdf data. Used by the extension since some data is already\n *   loaded before the switch to range requests.\n * @property {number}     [length] - The PDF file length. It's used for\n *   progress reports and range requests operations.\n * @property {PDFDataRangeTransport} [range]\n * @property {number}     [rangeChunkSize] - Specify maximum number of bytes\n *   fetched per range request. The default value is 2^16 = 65536.\n * @property {PDFWorker}  [worker] - The worker that will be used for\n *   the loading and parsing of the PDF data.\n * @property {number} [verbosity] - Controls the logging level; the\n *   constants from {VerbosityLevel} should be used.\n * @property {string} [docBaseUrl] - The base URL of the document,\n *   used when attempting to recover valid absolute URLs for annotations, and\n *   outline items, that (incorrectly) only specify relative URLs.\n * @property {string} [cMapUrl] - The URL where the predefined\n *   Adobe CMaps are located. Include trailing slash.\n * @property {boolean} [cMapPacked] - Specifies if the Adobe CMaps are\n *   binary packed.\n * @property {Object} [CMapReaderFactory] - The factory that will be\n *   used when reading built-in CMap files. Providing a custom factory is useful\n *   for environments without `XMLHttpRequest` support, such as e.g. Node.js.\n *   The default value is {DOMCMapReaderFactory}.\n * @property {boolean} [stopAtErrors] - Reject certain promises, e.g.\n *   `getOperatorList`, `getTextContent`, and `RenderTask`, when the associated\n *   PDF data cannot be successfully parsed, instead of attempting to recover\n *   whatever possible of the data. The default value is `false`.\n * @property {number} [maxImageSize] - The maximum allowed image size\n *   in total pixels, i.e. width * height. Images above this value will not be\n *   rendered. Use -1 for no limit, which is also the default value.\n * @property {boolean} [isEvalSupported] - Determines if we can eval\n *   strings as JS. Primarily used to improve performance of font rendering,\n *   and when parsing PDF functions. The default value is `true`.\n * @property {boolean} [disableFontFace] - By default fonts are\n *   converted to OpenType fonts and loaded via font face rules. If disabled,\n *   fonts will be rendered using a built-in font renderer that constructs the\n *   glyphs with primitive path commands. The default value is `false`.\n * @property {boolean} [fontExtraProperties] - Include additional properties,\n *   which are unused during rendering of PDF documents, when exporting the\n *   parsed font data from the worker-thread. This may be useful for debugging\n *   purposes (and backwards compatibility), but note that it will lead to\n *   increased memory usage. The default value is `false`.\n * @property {boolean} [disableRange] - Disable range request loading\n *   of PDF files. When enabled, and if the server supports partial content\n *   requests, then the PDF will be fetched in chunks.\n *   The default value is `false`.\n * @property {boolean} [disableStream] - Disable streaming of PDF file\n *   data. By default PDF.js attempts to load PDFs in chunks.\n *   The default value is `false`.\n * @property {boolean} [disableAutoFetch] - Disable pre-fetching of PDF\n *   file data. When range requests are enabled PDF.js will automatically keep\n *   fetching more data even if it isn't needed to display the current page.\n *   The default value is `false`.\n *   NOTE: It is also necessary to disable streaming, see above,\n *         in order for disabling of pre-fetching to work correctly.\n * @property {boolean} [pdfBug] - Enables special hooks for debugging\n *   PDF.js (see `web/debugger.js`). The default value is `false`.\n */\n\n/**\n * @typedef {Object} PDFDocumentStats\n * @property {Object} streamTypes - Used stream types in the document (an item\n *   is set to true if specific stream ID was used in the document).\n * @property {Object} fontTypes - Used font types in the document (an item\n *   is set to true if specific font ID was used in the document).\n */\n\n/**\n * This is the main entry point for loading a PDF and interacting with it.\n * NOTE: If a URL is used to fetch the PDF data a standard XMLHttpRequest(XHR)\n * is used, which means it must follow the same origin rules that any XHR does\n * e.g. No cross domain requests without CORS.\n *\n * @param {string|TypedArray|DocumentInitParameters|PDFDataRangeTransport} src\n * Can be a url to where a PDF is located, a typed array (Uint8Array)\n * already populated with data or parameter object.\n * @returns {PDFDocumentLoadingTask}\n */\nfunction getDocument(src) {\n  const task = new PDFDocumentLoadingTask();\n\n  let source;\n  if (typeof src === \"string\") {\n    source = { url: src };\n  } else if (isArrayBuffer(src)) {\n    source = { data: src };\n  } else if (src instanceof PDFDataRangeTransport) {\n    source = { range: src };\n  } else {\n    if (typeof src !== \"object\") {\n      throw new Error(\n        \"Invalid parameter in getDocument, \" +\n          \"need either Uint8Array, string or a parameter object\"\n      );\n    }\n    if (!src.url && !src.data && !src.range) {\n      throw new Error(\n        \"Invalid parameter object: need either .data, .range or .url\"\n      );\n    }\n    source = src;\n  }\n  const params = Object.create(null);\n  let rangeTransport = null,\n    worker = null;\n\n  for (const key in source) {\n    if (key === \"url\" && typeof window !== \"undefined\") {\n      // The full path is required in the 'url' field.\n      params[key] = new URL(source[key], window.location).href;\n      continue;\n    } else if (key === \"range\") {\n      rangeTransport = source[key];\n      continue;\n    } else if (key === \"worker\") {\n      worker = source[key];\n      continue;\n    } else if (key === \"data\" && !(source[key] instanceof Uint8Array)) {\n      // Converting string or array-like data to Uint8Array.\n      const pdfBytes = source[key];\n      if (typeof pdfBytes === \"string\") {\n        params[key] = stringToBytes(pdfBytes);\n      } else if (\n        typeof pdfBytes === \"object\" &&\n        pdfBytes !== null &&\n        !isNaN(pdfBytes.length)\n      ) {\n        params[key] = new Uint8Array(pdfBytes);\n      } else if (isArrayBuffer(pdfBytes)) {\n        params[key] = new Uint8Array(pdfBytes);\n      } else {\n        throw new Error(\n          \"Invalid PDF binary data: either typed array, \" +\n            \"string or array-like object is expected in the \" +\n            \"data property.\"\n        );\n      }\n      continue;\n    }\n    params[key] = source[key];\n  }\n\n  params.rangeChunkSize = params.rangeChunkSize || DEFAULT_RANGE_CHUNK_SIZE;\n  params.CMapReaderFactory = params.CMapReaderFactory || DOMCMapReaderFactory;\n  params.ignoreErrors = params.stopAtErrors !== true;\n  params.fontExtraProperties = params.fontExtraProperties === true;\n  params.pdfBug = params.pdfBug === true;\n\n  if (!Number.isInteger(params.maxImageSize)) {\n    params.maxImageSize = -1;\n  }\n  if (typeof params.isEvalSupported !== \"boolean\") {\n    params.isEvalSupported = true;\n  }\n  if (typeof params.disableFontFace !== \"boolean\") {\n    params.disableFontFace = apiCompatibilityParams.disableFontFace || false;\n  }\n\n  if (typeof params.disableRange !== \"boolean\") {\n    params.disableRange = false;\n  }\n  if (typeof params.disableStream !== \"boolean\") {\n    params.disableStream = false;\n  }\n  if (typeof params.disableAutoFetch !== \"boolean\") {\n    params.disableAutoFetch = false;\n  }\n\n  // Set the main-thread verbosity level.\n  setVerbosityLevel(params.verbosity);\n\n  if (!worker) {\n    const workerParams = {\n      verbosity: params.verbosity,\n      port: GlobalWorkerOptions.workerPort,\n    };\n    // Worker was not provided -- creating and owning our own. If message port\n    // is specified in global worker options, using it.\n    worker = workerParams.port\n      ? PDFWorker.fromPort(workerParams)\n      : new PDFWorker(workerParams);\n    task._worker = worker;\n  }\n  const docId = task.docId;\n  worker.promise\n    .then(function () {\n      if (task.destroyed) {\n        throw new Error(\"Loading aborted\");\n      }\n\n      const workerIdPromise = _fetchDocument(\n        worker,\n        params,\n        rangeTransport,\n        docId\n      );\n      const networkStreamPromise = new Promise(function (resolve) {\n        let networkStream;\n        if (rangeTransport) {\n          networkStream = new PDFDataTransportStream(\n            {\n              length: params.length,\n              initialData: params.initialData,\n              progressiveDone: params.progressiveDone,\n              disableRange: params.disableRange,\n              disableStream: params.disableStream,\n            },\n            rangeTransport\n          );\n        } else if (!params.data) {\n          networkStream = createPDFNetworkStream({\n            url: params.url,\n            length: params.length,\n            httpHeaders: params.httpHeaders,\n            withCredentials: params.withCredentials,\n            rangeChunkSize: params.rangeChunkSize,\n            disableRange: params.disableRange,\n            disableStream: params.disableStream,\n          });\n        }\n        resolve(networkStream);\n      });\n\n      return Promise.all([workerIdPromise, networkStreamPromise]).then(\n        function ([workerId, networkStream]) {\n          if (task.destroyed) {\n            throw new Error(\"Loading aborted\");\n          }\n\n          const messageHandler = new MessageHandler(\n            docId,\n            workerId,\n            worker.port\n          );\n          messageHandler.postMessageTransfers = worker.postMessageTransfers;\n          const transport = new WorkerTransport(\n            messageHandler,\n            task,\n            networkStream,\n            params\n          );\n          task._transport = transport;\n          messageHandler.send(\"Ready\", null);\n        }\n      );\n    })\n    .catch(task._capability.reject);\n\n  return task;\n}\n\n/**\n * Starts fetching of specified PDF document/data.\n * @param {PDFWorker} worker\n * @param {Object} source\n * @param {PDFDataRangeTransport} pdfDataRangeTransport\n * @param {string} docId Unique document id, used as MessageHandler id.\n * @returns {Promise} The promise, which is resolved when worker id of\n *                    MessageHandler is known.\n * @private\n */\nfunction _fetchDocument(worker, source, pdfDataRangeTransport, docId) {\n  if (worker.destroyed) {\n    return Promise.reject(new Error(\"Worker was destroyed\"));\n  }\n\n  if (pdfDataRangeTransport) {\n    source.length = pdfDataRangeTransport.length;\n    source.initialData = pdfDataRangeTransport.initialData;\n    source.progressiveDone = pdfDataRangeTransport.progressiveDone;\n  }\n  return worker.messageHandler\n    .sendWithPromise(\"GetDocRequest\", {\n      docId,\n      apiVersion:\n        typeof PDFJSDev !== \"undefined\" && !PDFJSDev.test(\"TESTING\")\n          ? PDFJSDev.eval(\"BUNDLE_VERSION\")\n          : null,\n      // Only send the required properties, and *not* the entire object.\n      source: {\n        data: source.data,\n        url: source.url,\n        password: source.password,\n        disableAutoFetch: source.disableAutoFetch,\n        rangeChunkSize: source.rangeChunkSize,\n        length: source.length,\n      },\n      maxImageSize: source.maxImageSize,\n      disableFontFace: source.disableFontFace,\n      postMessageTransfers: worker.postMessageTransfers,\n      docBaseUrl: source.docBaseUrl,\n      ignoreErrors: source.ignoreErrors,\n      isEvalSupported: source.isEvalSupported,\n      fontExtraProperties: source.fontExtraProperties,\n    })\n    .then(function (workerId) {\n      if (worker.destroyed) {\n        throw new Error(\"Worker was destroyed\");\n      }\n      return workerId;\n    });\n}\n\nconst PDFDocumentLoadingTask = (function PDFDocumentLoadingTaskClosure() {\n  let nextDocumentId = 0;\n\n  /**\n   * The loading task controls the operations required to load a PDF document\n   * (such as network requests) and provides a way to listen for completion,\n   * after which individual pages can be rendered.\n   */\n  // eslint-disable-next-line no-shadow\n  class PDFDocumentLoadingTask {\n    constructor() {\n      this._capability = createPromiseCapability();\n      this._transport = null;\n      this._worker = null;\n\n      /**\n       * Unique document loading task id -- used in MessageHandlers.\n       * @type {string}\n       */\n      this.docId = \"d\" + nextDocumentId++;\n\n      /**\n       * Shows if loading task is destroyed.\n       * @type {boolean}\n       */\n      this.destroyed = false;\n\n      /**\n       * Callback to request a password if wrong or no password was provided.\n       * The callback receives two parameters: function that needs to be called\n       * with new password and reason (see {PasswordResponses}).\n       */\n      this.onPassword = null;\n\n      /**\n       * Callback to be able to monitor the loading progress of the PDF file\n       * (necessary to implement e.g. a loading bar). The callback receives\n       * an {Object} with the properties: {number} loaded and {number} total.\n       */\n      this.onProgress = null;\n\n      /**\n       * Callback to when unsupported feature is used. The callback receives\n       * an {UNSUPPORTED_FEATURES} argument.\n       */\n      this.onUnsupportedFeature = null;\n    }\n\n    /**\n     * Promise for document loading task completion.\n     * @type {Promise}\n     */\n    get promise() {\n      return this._capability.promise;\n    }\n\n    /**\n     * Aborts all network requests and destroys worker.\n     * @returns {Promise} A promise that is resolved after destruction activity\n     *                    is completed.\n     */\n    destroy() {\n      this.destroyed = true;\n\n      const transportDestroyed = !this._transport\n        ? Promise.resolve()\n        : this._transport.destroy();\n      return transportDestroyed.then(() => {\n        this._transport = null;\n        if (this._worker) {\n          this._worker.destroy();\n          this._worker = null;\n        }\n      });\n    }\n  }\n  return PDFDocumentLoadingTask;\n})();\n\n/**\n * Abstract class to support range requests file loading.\n * @param {number} length\n * @param {Uint8Array} initialData\n * @param {boolean} progressiveDone\n */\nclass PDFDataRangeTransport {\n  constructor(length, initialData, progressiveDone = false) {\n    this.length = length;\n    this.initialData = initialData;\n    this.progressiveDone = progressiveDone;\n\n    this._rangeListeners = [];\n    this._progressListeners = [];\n    this._progressiveReadListeners = [];\n    this._progressiveDoneListeners = [];\n    this._readyCapability = createPromiseCapability();\n  }\n\n  addRangeListener(listener) {\n    this._rangeListeners.push(listener);\n  }\n\n  addProgressListener(listener) {\n    this._progressListeners.push(listener);\n  }\n\n  addProgressiveReadListener(listener) {\n    this._progressiveReadListeners.push(listener);\n  }\n\n  addProgressiveDoneListener(listener) {\n    this._progressiveDoneListeners.push(listener);\n  }\n\n  onDataRange(begin, chunk) {\n    for (const listener of this._rangeListeners) {\n      listener(begin, chunk);\n    }\n  }\n\n  onDataProgress(loaded, total) {\n    this._readyCapability.promise.then(() => {\n      for (const listener of this._progressListeners) {\n        listener(loaded, total);\n      }\n    });\n  }\n\n  onDataProgressiveRead(chunk) {\n    this._readyCapability.promise.then(() => {\n      for (const listener of this._progressiveReadListeners) {\n        listener(chunk);\n      }\n    });\n  }\n\n  onDataProgressiveDone() {\n    this._readyCapability.promise.then(() => {\n      for (const listener of this._progressiveDoneListeners) {\n        listener();\n      }\n    });\n  }\n\n  transportReady() {\n    this._readyCapability.resolve();\n  }\n\n  requestDataRange(begin, end) {\n    unreachable(\"Abstract method PDFDataRangeTransport.requestDataRange\");\n  }\n\n  abort() {}\n}\n\n/**\n * Proxy to a PDFDocument in the worker thread. Also, contains commonly used\n * properties that can be read synchronously.\n */\nclass PDFDocumentProxy {\n  constructor(pdfInfo, transport) {\n    this._pdfInfo = pdfInfo;\n    this._transport = transport;\n  }\n\n  /**\n   * @type {number} Total number of pages the PDF contains.\n   */\n  get numPages() {\n    return this._pdfInfo.numPages;\n  }\n\n  /**\n   * @type {string} A (not guaranteed to be) unique ID to identify a PDF.\n   */\n  get fingerprint() {\n    return this._pdfInfo.fingerprint;\n  }\n\n  /**\n   * @param {number} pageNumber - The page number to get. The first page is 1.\n   * @returns {Promise} A promise that is resolved with a {@link PDFPageProxy}\n   *   object.\n   */\n  getPage(pageNumber) {\n    return this._transport.getPage(pageNumber);\n  }\n\n  /**\n   * @param {{num: number, gen: number}} ref - The page reference. Must have\n   *   the `num` and `gen` properties.\n   * @returns {Promise} A promise that is resolved with the page index (starting\n   *   from zero) that is associated with the reference.\n   */\n  getPageIndex(ref) {\n    return this._transport.getPageIndex(ref);\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with a lookup table for\n   *   mapping named destinations to reference numbers.\n   *\n   * This can be slow for large documents. Use `getDestination` instead.\n   */\n  getDestinations() {\n    return this._transport.getDestinations();\n  }\n\n  /**\n   * @param {string} id - The named destination to get.\n   * @returns {Promise} A promise that is resolved with all information\n   *   of the given named destination.\n   */\n  getDestination(id) {\n    return this._transport.getDestination(id);\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with an {Array} containing\n   *   the page labels that correspond to the page indexes, or `null` when\n   *   no page labels are present in the PDF file.\n   */\n  getPageLabels() {\n    return this._transport.getPageLabels();\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with a {string} containing\n   *   the page layout name.\n   */\n  getPageLayout() {\n    return this._transport.getPageLayout();\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with a {string} containing\n   *   the page mode name.\n   */\n  getPageMode() {\n    return this._transport.getPageMode();\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with an {Object} containing\n   *   the viewer preferences, or `null` when no viewer preferences are present\n   *   in the PDF file.\n   */\n  getViewerPreferences() {\n    return this._transport.getViewerPreferences();\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with an {Object} containing\n   *   the currently supported actions, or `null` when no OpenAction exists.\n   */\n  getOpenAction() {\n    return this._transport.getOpenAction();\n  }\n\n  getOpenActionDestination() {\n    deprecated(\"getOpenActionDestination, use getOpenAction instead.\");\n    return this.getOpenAction().then(function (openAction) {\n      return openAction && openAction.dest ? openAction.dest : null;\n    });\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with a lookup table for\n   *   mapping named attachments to their content.\n   */\n  getAttachments() {\n    return this._transport.getAttachments();\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with an {Array} of all the\n   *   JavaScript strings in the name tree, or `null` if no JavaScript exists.\n   */\n  getJavaScript() {\n    return this._transport.getJavaScript();\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with an {Array} that is a\n   * tree outline (if it has one) of the PDF. The tree is in the format of:\n   * [\n   *   {\n   *     title: string,\n   *     bold: boolean,\n   *     italic: boolean,\n   *     color: rgb Uint8ClampedArray,\n   *     count: integer or undefined,\n   *     dest: dest obj,\n   *     url: string,\n   *     items: array of more items like this\n   *   },\n   *   ...\n   * ]\n   */\n  getOutline() {\n    return this._transport.getOutline();\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with an {Array} that contains\n   *   the permission flags for the PDF document, or `null` when\n   *   no permissions are present in the PDF file.\n   */\n  getPermissions() {\n    return this._transport.getPermissions();\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with an {Object} that has\n   *   `info` and `metadata` properties. `info` is an {Object} filled with\n   *   anything available in the information dictionary and similarly\n   *   `metadata` is a {Metadata} object with information from the metadata\n   *   section of the PDF.\n   */\n  getMetadata() {\n    return this._transport.getMetadata();\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with a {TypedArray} that has\n   *   the raw data from the PDF.\n   */\n  getData() {\n    return this._transport.getData();\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved when the document's data\n   *   is loaded. It is resolved with an {Object} that contains the `length`\n   *   property that indicates size of the PDF data in bytes.\n   */\n  getDownloadInfo() {\n    return this._transport.downloadInfoCapability.promise;\n  }\n\n  /**\n   * @returns {Promise} A promise this is resolved with current statistics about\n   *   document structures (see {@link PDFDocumentStats}).\n   */\n  getStats() {\n    return this._transport.getStats();\n  }\n\n  /**\n   * Cleans up resources allocated by the document, on both the main- and\n   * worker-threads.\n   *\n   * NOTE: Do not, under any circumstances, call this method when rendering is\n   *       currently ongoing since that may lead to rendering errors.\n   *\n   * @returns {Promise} A promise that is resolved when clean-up has finished.\n   */\n  cleanup() {\n    return this._transport.startCleanup();\n  }\n\n  /**\n   * Destroys the current document instance and terminates the worker.\n   */\n  destroy() {\n    return this.loadingTask.destroy();\n  }\n\n  /**\n   * @type {Object} A subset of the current {DocumentInitParameters}, which are\n   *   either needed in the viewer and/or whose default values may be affected\n   *   by the `apiCompatibilityParams`.\n   */\n  get loadingParams() {\n    return this._transport.loadingParams;\n  }\n\n  /**\n   * @type {PDFDocumentLoadingTask} The loadingTask for the current document.\n   */\n  get loadingTask() {\n    return this._transport.loadingTask;\n  }\n}\n\n/**\n * Page getViewport parameters.\n *\n * @typedef {Object} GetViewportParameters\n * @property {number} scale - The desired scale of the viewport.\n * @property {number} [rotation] - The desired rotation, in degrees, of\n *   the viewport. If omitted it defaults to the page rotation.\n * @property {number} [offsetX] - The horizontal, i.e. x-axis, offset.\n *   The default value is `0`.\n * @property {number} [offsetY] - The vertical, i.e. y-axis, offset.\n *   The default value is `0`.\n * @property {boolean} [dontFlip] - If true, the y-axis will not be\n *   flipped. The default value is `false`.\n */\n\n/**\n * Page getTextContent parameters.\n *\n * @typedef {Object} getTextContentParameters\n * @property {boolean} normalizeWhitespace - replaces all occurrences of\n *   whitespace with standard spaces (0x20). The default value is `false`.\n * @property {boolean} disableCombineTextItems - do not attempt to combine\n *   same line {@link TextItem}'s. The default value is `false`.\n */\n\n/**\n * Page text content.\n *\n * @typedef {Object} TextContent\n * @property {array} items - array of {@link TextItem}\n * @property {Object} styles - {@link TextStyle} objects, indexed by font name.\n */\n\n/**\n * Page text content part.\n *\n * @typedef {Object} TextItem\n * @property {string} str - text content.\n * @property {string} dir - text direction: 'ttb', 'ltr' or 'rtl'.\n * @property {array} transform - transformation matrix.\n * @property {number} width - width in device space.\n * @property {number} height - height in device space.\n * @property {string} fontName - font name used by pdf.js for converted font.\n */\n\n/**\n * Text style.\n *\n * @typedef {Object} TextStyle\n * @property {number} ascent - font ascent.\n * @property {number} descent - font descent.\n * @property {boolean} vertical - text is in vertical mode.\n * @property {string} fontFamily - possible font family\n */\n\n/**\n * Page annotation parameters.\n *\n * @typedef {Object} GetAnnotationsParameters\n * @property {string} intent - Determines the annotations that will be fetched,\n *                    can be either 'display' (viewable annotations) or 'print'\n *                    (printable annotations).\n *                    If the parameter is omitted, all annotations are fetched.\n */\n\n/**\n * Page render parameters.\n *\n * @typedef {Object} RenderParameters\n * @property {Object} canvasContext - A 2D context of a DOM Canvas object.\n * @property {PageViewport} viewport - Rendering viewport obtained by\n *                          calling the `PDFPageProxy.getViewport` method.\n * @property {string} [intent] - Rendering intent, can be 'display' or 'print'\n *                    (default value is 'display').\n * @property {boolean} [enableWebGL] - Enables WebGL accelerated rendering\n *                     for some operations. The default value is `false`.\n * @property {boolean} [renderInteractiveForms] - Whether or not\n *                     interactive form elements are rendered in the display\n *                     layer. If so, we do not render them on canvas as well.\n * @property {Array}  [transform] - Additional transform, applied\n *                    just before viewport transform.\n * @property {Object} [imageLayer] - An object that has beginLayout,\n *                    endLayout and appendImage functions.\n * @property {Object} [canvasFactory] - The factory that will be used\n *                    when creating canvases. The default value is\n *                    {DOMCanvasFactory}.\n * @property {Object} [background] - Background to use for the canvas.\n *                    Can use any valid canvas.fillStyle: A DOMString parsed as\n *                    CSS <color> value, a CanvasGradient object (a linear or\n *                    radial gradient) or a CanvasPattern object (a repetitive\n *                    image). The default value is 'rgb(255,255,255)'.\n */\n\n/**\n * PDF page operator list.\n *\n * @typedef {Object} PDFOperatorList\n * @property {Array} fnArray - Array containing the operator functions.\n * @property {Array} argsArray - Array containing the arguments of the\n *                               functions.\n */\n\n/**\n * Proxy to a PDFPage in the worker thread.\n * @alias PDFPageProxy\n */\nclass PDFPageProxy {\n  constructor(pageIndex, pageInfo, transport, pdfBug = false) {\n    this._pageIndex = pageIndex;\n    this._pageInfo = pageInfo;\n    this._transport = transport;\n    this._stats = pdfBug ? new StatTimer() : null;\n    this._pdfBug = pdfBug;\n    this.commonObjs = transport.commonObjs;\n    this.objs = new PDFObjects();\n\n    this.cleanupAfterRender = false;\n    this.pendingCleanup = false;\n    this.intentStates = Object.create(null);\n    this.destroyed = false;\n  }\n\n  /**\n   * @type {number} Page number of the page. First page is 1.\n   */\n  get pageNumber() {\n    return this._pageIndex + 1;\n  }\n\n  /**\n   * @type {number} The number of degrees the page is rotated clockwise.\n   */\n  get rotate() {\n    return this._pageInfo.rotate;\n  }\n\n  /**\n   * @type {Object} The reference that points to this page. It has `num` and\n   *   `gen` properties.\n   */\n  get ref() {\n    return this._pageInfo.ref;\n  }\n\n  /**\n   * @type {number} The default size of units in 1/72nds of an inch.\n   */\n  get userUnit() {\n    return this._pageInfo.userUnit;\n  }\n\n  /**\n   * @type {Array} An array of the visible portion of the PDF page in user\n   *   space units [x1, y1, x2, y2].\n   */\n  get view() {\n    return this._pageInfo.view;\n  }\n\n  /**\n   * @param {GetViewportParameters} params - Viewport parameters.\n   * @returns {PageViewport} Contains 'width' and 'height' properties\n   *   along with transforms required for rendering.\n   */\n  getViewport({\n    scale,\n    rotation = this.rotate,\n    offsetX = 0,\n    offsetY = 0,\n    dontFlip = false,\n  } = {}) {\n    return new PageViewport({\n      viewBox: this.view,\n      scale,\n      rotation,\n      offsetX,\n      offsetY,\n      dontFlip,\n    });\n  }\n\n  /**\n   * @param {GetAnnotationsParameters} params - Annotation parameters.\n   * @returns {Promise} A promise that is resolved with an {Array} of the\n   *   annotation objects.\n   */\n  getAnnotations({ intent = null } = {}) {\n    if (!this.annotationsPromise || this.annotationsIntent !== intent) {\n      this.annotationsPromise = this._transport.getAnnotations(\n        this._pageIndex,\n        intent\n      );\n      this.annotationsIntent = intent;\n    }\n    return this.annotationsPromise;\n  }\n\n  /**\n   * Begins the process of rendering a page to the desired context.\n   * @param {RenderParameters} params Page render parameters.\n   * @returns {RenderTask} An object that contains the promise, which\n   *                       is resolved when the page finishes rendering.\n   */\n  render({\n    canvasContext,\n    viewport,\n    intent = \"display\",\n    enableWebGL = false,\n    renderInteractiveForms = false,\n    transform = null,\n    imageLayer = null,\n    canvasFactory = null,\n    background = null,\n  }) {\n    if (this._stats) {\n      this._stats.time(\"Overall\");\n    }\n\n    const renderingIntent = intent === \"print\" ? \"print\" : \"display\";\n    // If there was a pending destroy, cancel it so no cleanup happens during\n    // this call to render.\n    this.pendingCleanup = false;\n\n    if (!this.intentStates[renderingIntent]) {\n      this.intentStates[renderingIntent] = Object.create(null);\n    }\n    const intentState = this.intentStates[renderingIntent];\n\n    // Ensure that a pending `streamReader` cancel timeout is always aborted.\n    if (intentState.streamReaderCancelTimeout) {\n      clearTimeout(intentState.streamReaderCancelTimeout);\n      intentState.streamReaderCancelTimeout = null;\n    }\n\n    const canvasFactoryInstance = canvasFactory || new DOMCanvasFactory();\n    const webGLContext = new WebGLContext({\n      enable: enableWebGL,\n    });\n\n    // If there's no displayReadyCapability yet, then the operatorList\n    // was never requested before. Make the request and create the promise.\n    if (!intentState.displayReadyCapability) {\n      intentState.displayReadyCapability = createPromiseCapability();\n      intentState.operatorList = {\n        fnArray: [],\n        argsArray: [],\n        lastChunk: false,\n      };\n\n      if (this._stats) {\n        this._stats.time(\"Page Request\");\n      }\n      this._pumpOperatorList({\n        pageIndex: this._pageIndex,\n        intent: renderingIntent,\n        renderInteractiveForms: renderInteractiveForms === true,\n      });\n    }\n\n    const complete = error => {\n      const i = intentState.renderTasks.indexOf(internalRenderTask);\n      if (i >= 0) {\n        intentState.renderTasks.splice(i, 1);\n      }\n\n      // Attempt to reduce memory usage during *printing*, by always running\n      // cleanup once rendering has finished (regardless of cleanupAfterRender).\n      if (this.cleanupAfterRender || renderingIntent === \"print\") {\n        this.pendingCleanup = true;\n      }\n      this._tryCleanup();\n\n      if (error) {\n        internalRenderTask.capability.reject(error);\n\n        this._abortOperatorList({\n          intentState,\n          reason: error,\n        });\n      } else {\n        internalRenderTask.capability.resolve();\n      }\n      if (this._stats) {\n        this._stats.timeEnd(\"Rendering\");\n        this._stats.timeEnd(\"Overall\");\n      }\n    };\n\n    const internalRenderTask = new InternalRenderTask({\n      callback: complete,\n      // Only include the required properties, and *not* the entire object.\n      params: {\n        canvasContext,\n        viewport,\n        transform,\n        imageLayer,\n        background,\n      },\n      objs: this.objs,\n      commonObjs: this.commonObjs,\n      operatorList: intentState.operatorList,\n      pageIndex: this._pageIndex,\n      canvasFactory: canvasFactoryInstance,\n      webGLContext,\n      useRequestAnimationFrame: renderingIntent !== \"print\",\n      pdfBug: this._pdfBug,\n    });\n\n    if (!intentState.renderTasks) {\n      intentState.renderTasks = [];\n    }\n    intentState.renderTasks.push(internalRenderTask);\n    const renderTask = internalRenderTask.task;\n\n    intentState.displayReadyCapability.promise\n      .then(transparency => {\n        if (this.pendingCleanup) {\n          complete();\n          return;\n        }\n        if (this._stats) {\n          this._stats.time(\"Rendering\");\n        }\n        internalRenderTask.initializeGraphics(transparency);\n        internalRenderTask.operatorListChanged();\n      })\n      .catch(complete);\n\n    return renderTask;\n  }\n\n  /**\n   * @returns {Promise} A promise resolved with an {@link PDFOperatorList}\n   *   object that represents page's operator list.\n   */\n  getOperatorList() {\n    function operatorListChanged() {\n      if (intentState.operatorList.lastChunk) {\n        intentState.opListReadCapability.resolve(intentState.operatorList);\n\n        const i = intentState.renderTasks.indexOf(opListTask);\n        if (i >= 0) {\n          intentState.renderTasks.splice(i, 1);\n        }\n      }\n    }\n\n    const renderingIntent = \"oplist\";\n    if (!this.intentStates[renderingIntent]) {\n      this.intentStates[renderingIntent] = Object.create(null);\n    }\n    const intentState = this.intentStates[renderingIntent];\n    let opListTask;\n\n    if (!intentState.opListReadCapability) {\n      opListTask = {};\n      opListTask.operatorListChanged = operatorListChanged;\n      intentState.opListReadCapability = createPromiseCapability();\n      intentState.renderTasks = [];\n      intentState.renderTasks.push(opListTask);\n      intentState.operatorList = {\n        fnArray: [],\n        argsArray: [],\n        lastChunk: false,\n      };\n\n      if (this._stats) {\n        this._stats.time(\"Page Request\");\n      }\n      this._pumpOperatorList({\n        pageIndex: this._pageIndex,\n        intent: renderingIntent,\n      });\n    }\n    return intentState.opListReadCapability.promise;\n  }\n\n  /**\n   * @param {getTextContentParameters} params - getTextContent parameters.\n   * @returns {ReadableStream} ReadableStream to read textContent chunks.\n   */\n  streamTextContent({\n    normalizeWhitespace = false,\n    disableCombineTextItems = false,\n  } = {}) {\n    const TEXT_CONTENT_CHUNK_SIZE = 100;\n\n    return this._transport.messageHandler.sendWithStream(\n      \"GetTextContent\",\n      {\n        pageIndex: this._pageIndex,\n        normalizeWhitespace: normalizeWhitespace === true,\n        combineTextItems: disableCombineTextItems !== true,\n      },\n      {\n        highWaterMark: TEXT_CONTENT_CHUNK_SIZE,\n        size(textContent) {\n          return textContent.items.length;\n        },\n      }\n    );\n  }\n\n  /**\n   * @param {getTextContentParameters} params - getTextContent parameters.\n   * @returns {Promise} That is resolved a {@link TextContent}\n   *   object that represent the page text content.\n   */\n  getTextContent(params = {}) {\n    const readableStream = this.streamTextContent(params);\n\n    return new Promise(function (resolve, reject) {\n      function pump() {\n        reader.read().then(function ({ value, done }) {\n          if (done) {\n            resolve(textContent);\n            return;\n          }\n          Object.assign(textContent.styles, value.styles);\n          textContent.items.push(...value.items);\n          pump();\n        }, reject);\n      }\n\n      const reader = readableStream.getReader();\n      const textContent = {\n        items: [],\n        styles: Object.create(null),\n      };\n      pump();\n    });\n  }\n\n  /**\n   * Destroys the page object.\n   * @private\n   */\n  _destroy() {\n    this.destroyed = true;\n    this._transport.pageCache[this._pageIndex] = null;\n\n    const waitOn = [];\n    Object.keys(this.intentStates).forEach(intent => {\n      const intentState = this.intentStates[intent];\n      this._abortOperatorList({\n        intentState,\n        reason: new Error(\"Page was destroyed.\"),\n        force: true,\n      });\n\n      if (intent === \"oplist\") {\n        // Avoid errors below, since the renderTasks are just stubs.\n        return;\n      }\n      intentState.renderTasks.forEach(function (renderTask) {\n        const renderCompleted = renderTask.capability.promise.catch(\n          function () {}\n        ); // ignoring failures\n        waitOn.push(renderCompleted);\n        renderTask.cancel();\n      });\n    });\n    this.objs.clear();\n    this.annotationsPromise = null;\n    this.pendingCleanup = false;\n    return Promise.all(waitOn);\n  }\n\n  /**\n   * Cleans up resources allocated by the page.\n   * @param {boolean} [resetStats] - Reset page stats, if enabled.\n   *   The default value is `false`.\n   * @returns {boolean} Indicating if clean-up was successfully run.\n   */\n  cleanup(resetStats = false) {\n    this.pendingCleanup = true;\n    return this._tryCleanup(resetStats);\n  }\n\n  /**\n   * Attempts to clean up if rendering is in a state where that's possible.\n   * @private\n   */\n  _tryCleanup(resetStats = false) {\n    if (\n      !this.pendingCleanup ||\n      Object.keys(this.intentStates).some(intent => {\n        const intentState = this.intentStates[intent];\n        return (\n          intentState.renderTasks.length !== 0 ||\n          !intentState.operatorList.lastChunk\n        );\n      })\n    ) {\n      return false;\n    }\n\n    Object.keys(this.intentStates).forEach(intent => {\n      delete this.intentStates[intent];\n    });\n    this.objs.clear();\n    this.annotationsPromise = null;\n    if (resetStats && this._stats) {\n      this._stats = new StatTimer();\n    }\n    this.pendingCleanup = false;\n    return true;\n  }\n\n  /**\n   * @private\n   */\n  _startRenderPage(transparency, intent) {\n    const intentState = this.intentStates[intent];\n    if (!intentState) {\n      return; // Rendering was cancelled.\n    }\n    if (this._stats) {\n      this._stats.timeEnd(\"Page Request\");\n    }\n    // TODO Refactor RenderPageRequest to separate rendering\n    // and operator list logic\n    if (intentState.displayReadyCapability) {\n      intentState.displayReadyCapability.resolve(transparency);\n    }\n  }\n\n  /**\n   * @private\n   */\n  _renderPageChunk(operatorListChunk, intentState) {\n    // Add the new chunk to the current operator list.\n    for (let i = 0, ii = operatorListChunk.length; i < ii; i++) {\n      intentState.operatorList.fnArray.push(operatorListChunk.fnArray[i]);\n      intentState.operatorList.argsArray.push(operatorListChunk.argsArray[i]);\n    }\n    intentState.operatorList.lastChunk = operatorListChunk.lastChunk;\n\n    // Notify all the rendering tasks there are more operators to be consumed.\n    for (let i = 0; i < intentState.renderTasks.length; i++) {\n      intentState.renderTasks[i].operatorListChanged();\n    }\n\n    if (operatorListChunk.lastChunk) {\n      this._tryCleanup();\n    }\n  }\n\n  /**\n   * @private\n   */\n  _pumpOperatorList(args) {\n    assert(\n      args.intent,\n      'PDFPageProxy._pumpOperatorList: Expected \"intent\" argument.'\n    );\n\n    const readableStream = this._transport.messageHandler.sendWithStream(\n      \"GetOperatorList\",\n      args\n    );\n    const reader = readableStream.getReader();\n\n    const intentState = this.intentStates[args.intent];\n    intentState.streamReader = reader;\n\n    const pump = () => {\n      reader.read().then(\n        ({ value, done }) => {\n          if (done) {\n            intentState.streamReader = null;\n            return;\n          }\n          if (this._transport.destroyed) {\n            return; // Ignore any pending requests if the worker was terminated.\n          }\n          this._renderPageChunk(value, intentState);\n          pump();\n        },\n        reason => {\n          intentState.streamReader = null;\n\n          if (this._transport.destroyed) {\n            return; // Ignore any pending requests if the worker was terminated.\n          }\n          if (intentState.operatorList) {\n            // Mark operator list as complete.\n            intentState.operatorList.lastChunk = true;\n\n            for (let i = 0; i < intentState.renderTasks.length; i++) {\n              intentState.renderTasks[i].operatorListChanged();\n            }\n            this._tryCleanup();\n          }\n\n          if (intentState.displayReadyCapability) {\n            intentState.displayReadyCapability.reject(reason);\n          } else if (intentState.opListReadCapability) {\n            intentState.opListReadCapability.reject(reason);\n          } else {\n            throw reason;\n          }\n        }\n      );\n    };\n    pump();\n  }\n\n  /**\n   * @private\n   */\n  _abortOperatorList({ intentState, reason, force = false }) {\n    assert(\n      reason instanceof Error ||\n        (typeof reason === \"object\" && reason !== null),\n      'PDFPageProxy._abortOperatorList: Expected \"reason\" argument.'\n    );\n\n    if (!intentState.streamReader) {\n      return;\n    }\n    if (!force) {\n      // Ensure that an Error occurring in *only* one `InternalRenderTask`, e.g.\n      // multiple render() calls on the same canvas, won't break all rendering.\n      if (intentState.renderTasks.length !== 0) {\n        return;\n      }\n      // Don't immediately abort parsing on the worker-thread when rendering is\n      // cancelled, since that will unnecessarily delay re-rendering when (for\n      // partially parsed pages) e.g. zooming/rotation occurs in the viewer.\n      if (reason instanceof RenderingCancelledException) {\n        intentState.streamReaderCancelTimeout = setTimeout(() => {\n          this._abortOperatorList({ intentState, reason, force: true });\n          intentState.streamReaderCancelTimeout = null;\n        }, RENDERING_CANCELLED_TIMEOUT);\n        return;\n      }\n    }\n    intentState.streamReader.cancel(\n      new AbortException(reason && reason.message)\n    );\n    intentState.streamReader = null;\n\n    if (this._transport.destroyed) {\n      return; // Ignore any pending requests if the worker was terminated.\n    }\n    // Remove the current `intentState`, since a cancelled `getOperatorList`\n    // call on the worker-thread cannot be re-started...\n    Object.keys(this.intentStates).some(intent => {\n      if (this.intentStates[intent] === intentState) {\n        delete this.intentStates[intent];\n        return true;\n      }\n      return false;\n    });\n    // ... and force clean-up to ensure that any old state is always removed.\n    this.cleanup();\n  }\n\n  /**\n   * @type {Object} Returns page stats, if enabled; returns `null` otherwise.\n   */\n  get stats() {\n    return this._stats;\n  }\n}\n\nclass LoopbackPort {\n  constructor(defer = true) {\n    this._listeners = [];\n    this._defer = defer;\n    this._deferred = Promise.resolve(undefined);\n  }\n\n  postMessage(obj, transfers) {\n    function cloneValue(value) {\n      // Trying to perform a structured clone close to the spec, including\n      // transfers.\n      if (typeof value !== \"object\" || value === null) {\n        return value;\n      }\n      if (cloned.has(value)) {\n        // already cloned the object\n        return cloned.get(value);\n      }\n      let buffer, result;\n      if ((buffer = value.buffer) && isArrayBuffer(buffer)) {\n        // We found object with ArrayBuffer (typed array).\n        const transferable = transfers && transfers.includes(buffer);\n        if (transferable) {\n          result = new value.constructor(\n            buffer,\n            value.byteOffset,\n            value.byteLength\n          );\n        } else {\n          result = new value.constructor(value);\n        }\n        cloned.set(value, result);\n        return result;\n      }\n      result = Array.isArray(value) ? [] : {};\n      cloned.set(value, result); // adding to cache now for cyclic references\n      // Cloning all value and object properties, however ignoring properties\n      // defined via getter.\n      for (const i in value) {\n        let desc,\n          p = value;\n        while (!(desc = Object.getOwnPropertyDescriptor(p, i))) {\n          p = Object.getPrototypeOf(p);\n        }\n        if (typeof desc.value === \"undefined\") {\n          continue;\n        }\n        if (typeof desc.value === \"function\") {\n          if (value.hasOwnProperty && value.hasOwnProperty(i)) {\n            throw new Error(\n              `LoopbackPort.postMessage - cannot clone: ${value[i]}`\n            );\n          }\n          continue;\n        }\n        result[i] = cloneValue(desc.value);\n      }\n      return result;\n    }\n\n    if (!this._defer) {\n      this._listeners.forEach(listener => {\n        listener.call(this, { data: obj });\n      });\n      return;\n    }\n\n    const cloned = new WeakMap();\n    const e = { data: cloneValue(obj) };\n    this._deferred.then(() => {\n      this._listeners.forEach(listener => {\n        listener.call(this, e);\n      });\n    });\n  }\n\n  addEventListener(name, listener) {\n    this._listeners.push(listener);\n  }\n\n  removeEventListener(name, listener) {\n    const i = this._listeners.indexOf(listener);\n    this._listeners.splice(i, 1);\n  }\n\n  terminate() {\n    this._listeners.length = 0;\n  }\n}\n\n/**\n * @typedef {Object} PDFWorkerParameters\n * @property {string} [name] - The name of the worker.\n * @property {Object} [port] - The `workerPort`.\n * @property {number} [verbosity] - Controls the logging level; the\n *   constants from {VerbosityLevel} should be used.\n */\n\nconst PDFWorker = (function PDFWorkerClosure() {\n  const pdfWorkerPorts = new WeakMap();\n  let isWorkerDisabled = false;\n  let fallbackWorkerSrc;\n  let nextFakeWorkerId = 0;\n  let fakeWorkerCapability;\n\n  if (typeof PDFJSDev !== \"undefined\" && PDFJSDev.test(\"GENERIC\")) {\n    // eslint-disable-next-line no-undef\n    if (isNodeJS && typeof __non_webpack_require__ === \"function\") {\n      // Workers aren't supported in Node.js, force-disabling them there.\n      isWorkerDisabled = true;\n\n      if (typeof PDFJSDev !== \"undefined\" && PDFJSDev.test(\"LIB\")) {\n        fallbackWorkerSrc = \"../pdf.worker.js\";\n      } else {\n        fallbackWorkerSrc = \"./pdf.worker.js\";\n      }\n    } else if (typeof document === \"object\" && \"currentScript\" in document) {\n      const pdfjsFilePath =\n        document.currentScript && document.currentScript.src;\n      if (pdfjsFilePath) {\n        fallbackWorkerSrc = pdfjsFilePath.replace(\n          /(\\.(?:min\\.)?js)(\\?.*)?$/i,\n          \".worker$1$2\"\n        );\n      }\n    }\n  }\n\n  function getWorkerSrc() {\n    if (GlobalWorkerOptions.workerSrc) {\n      return GlobalWorkerOptions.workerSrc;\n    }\n    if (typeof fallbackWorkerSrc !== \"undefined\") {\n      if (!isNodeJS) {\n        deprecated('No \"GlobalWorkerOptions.workerSrc\" specified.');\n      }\n      return fallbackWorkerSrc;\n    }\n    throw new Error('No \"GlobalWorkerOptions.workerSrc\" specified.');\n  }\n\n  function getMainThreadWorkerMessageHandler() {\n    let mainWorkerMessageHandler;\n    try {\n      mainWorkerMessageHandler =\n        globalThis.pdfjsWorker && globalThis.pdfjsWorker.WorkerMessageHandler;\n    } catch (ex) {\n      /* Ignore errors. */\n    }\n    return mainWorkerMessageHandler || null;\n  }\n\n  // Loads worker code into main thread.\n  function setupFakeWorkerGlobal() {\n    if (fakeWorkerCapability) {\n      return fakeWorkerCapability.promise;\n    }\n    fakeWorkerCapability = createPromiseCapability();\n\n    const loader = async function () {\n      const mainWorkerMessageHandler = getMainThreadWorkerMessageHandler();\n\n      if (mainWorkerMessageHandler) {\n        // The worker was already loaded using e.g. a `<script>` tag.\n        return mainWorkerMessageHandler;\n      }\n      if (typeof PDFJSDev === \"undefined\" || !PDFJSDev.test(\"PRODUCTION\")) {\n        if (typeof SystemJS !== \"object\") {\n          // Manually load SystemJS, since it's only necessary for fake workers.\n          await loadScript(\"../node_modules/systemjs/dist/system.js\");\n          await loadScript(\"../systemjs.config.js\");\n        }\n        const worker = await SystemJS.import(\"pdfjs/core/worker.js\");\n        return worker.WorkerMessageHandler;\n      }\n      if (\n        PDFJSDev.test(\"GENERIC\") &&\n        isNodeJS &&\n        // eslint-disable-next-line no-undef\n        typeof __non_webpack_require__ === \"function\"\n      ) {\n        // Since bundlers, such as Webpack, cannot be told to leave `require`\n        // statements alone we are thus forced to jump through hoops in order\n        // to prevent `Critical dependency: ...` warnings in third-party\n        // deployments of the built `pdf.js`/`pdf.worker.js` files; see\n        // https://github.com/webpack/webpack/issues/8826\n        //\n        // The following hack is based on the assumption that code running in\n        // Node.js won't ever be affected by e.g. Content Security Policies that\n        // prevent the use of `eval`. If that ever occurs, we should revert this\n        // to a normal `__non_webpack_require__` statement and simply document\n        // the Webpack warnings instead (telling users to ignore them).\n        //\n        // eslint-disable-next-line no-eval\n        const worker = eval(\"require\")(getWorkerSrc());\n        return worker.WorkerMessageHandler;\n      }\n      await loadScript(getWorkerSrc());\n      return window.pdfjsWorker.WorkerMessageHandler;\n    };\n    loader().then(fakeWorkerCapability.resolve, fakeWorkerCapability.reject);\n\n    return fakeWorkerCapability.promise;\n  }\n\n  function createCDNWrapper(url) {\n    // We will rely on blob URL's property to specify origin.\n    // We want this function to fail in case if createObjectURL or Blob do not\n    // exist or fail for some reason -- our Worker creation will fail anyway.\n    const wrapper = \"importScripts('\" + url + \"');\";\n    return URL.createObjectURL(new Blob([wrapper]));\n  }\n\n  /**\n   * PDF.js web worker abstraction, which controls the instantiation of PDF\n   * documents. Message handlers are used to pass information from the main\n   * thread to the worker thread and vice versa. If the creation of a web\n   * worker is not possible, a \"fake\" worker will be used instead.\n   */\n  // eslint-disable-next-line no-shadow\n  class PDFWorker {\n    /**\n     * @param {PDFWorkerParameters} params - Worker initialization parameters.\n     */\n    constructor({\n      name = null,\n      port = null,\n      verbosity = getVerbosityLevel(),\n    } = {}) {\n      if (port && pdfWorkerPorts.has(port)) {\n        throw new Error(\"Cannot use more than one PDFWorker per port\");\n      }\n\n      this.name = name;\n      this.destroyed = false;\n      this.postMessageTransfers = true;\n      this.verbosity = verbosity;\n\n      this._readyCapability = createPromiseCapability();\n      this._port = null;\n      this._webWorker = null;\n      this._messageHandler = null;\n\n      if (port) {\n        pdfWorkerPorts.set(port, this);\n        this._initializeFromPort(port);\n        return;\n      }\n      this._initialize();\n    }\n\n    get promise() {\n      return this._readyCapability.promise;\n    }\n\n    get port() {\n      return this._port;\n    }\n\n    get messageHandler() {\n      return this._messageHandler;\n    }\n\n    _initializeFromPort(port) {\n      this._port = port;\n      this._messageHandler = new MessageHandler(\"main\", \"worker\", port);\n      this._messageHandler.on(\"ready\", function () {\n        // Ignoring 'ready' event -- MessageHandler shall be already initialized\n        // and ready to accept the messages.\n      });\n      this._readyCapability.resolve();\n    }\n\n    _initialize() {\n      // If worker support isn't disabled explicit and the browser has worker\n      // support, create a new web worker and test if it/the browser fulfills\n      // all requirements to run parts of pdf.js in a web worker.\n      // Right now, the requirement is, that an Uint8Array is still an\n      // Uint8Array as it arrives on the worker. (Chrome added this with v.15.)\n      if (\n        typeof Worker !== \"undefined\" &&\n        !isWorkerDisabled &&\n        !getMainThreadWorkerMessageHandler()\n      ) {\n        let workerSrc = getWorkerSrc();\n\n        try {\n          // Wraps workerSrc path into blob URL, if the former does not belong\n          // to the same origin.\n          if (\n            typeof PDFJSDev !== \"undefined\" &&\n            PDFJSDev.test(\"GENERIC\") &&\n            !isSameOrigin(window.location.href, workerSrc)\n          ) {\n            workerSrc = createCDNWrapper(\n              new URL(workerSrc, window.location).href\n            );\n          }\n\n          // Some versions of FF can't create a worker on localhost, see:\n          // https://bugzilla.mozilla.org/show_bug.cgi?id=683280\n          const worker = new Worker(workerSrc);\n          const messageHandler = new MessageHandler(\"main\", \"worker\", worker);\n          const terminateEarly = () => {\n            worker.removeEventListener(\"error\", onWorkerError);\n            messageHandler.destroy();\n            worker.terminate();\n            if (this.destroyed) {\n              this._readyCapability.reject(new Error(\"Worker was destroyed\"));\n            } else {\n              // Fall back to fake worker if the termination is caused by an\n              // error (e.g. NetworkError / SecurityError).\n              this._setupFakeWorker();\n            }\n          };\n\n          const onWorkerError = () => {\n            if (!this._webWorker) {\n              // Worker failed to initialize due to an error. Clean up and fall\n              // back to the fake worker.\n              terminateEarly();\n            }\n          };\n          worker.addEventListener(\"error\", onWorkerError);\n\n          messageHandler.on(\"test\", data => {\n            worker.removeEventListener(\"error\", onWorkerError);\n            if (this.destroyed) {\n              terminateEarly();\n              return; // worker was destroyed\n            }\n            if (data) {\n              // supportTypedArray\n              this._messageHandler = messageHandler;\n              this._port = worker;\n              this._webWorker = worker;\n              if (!data.supportTransfers) {\n                this.postMessageTransfers = false;\n              }\n              this._readyCapability.resolve();\n              // Send global setting, e.g. verbosity level.\n              messageHandler.send(\"configure\", {\n                verbosity: this.verbosity,\n              });\n            } else {\n              this._setupFakeWorker();\n              messageHandler.destroy();\n              worker.terminate();\n            }\n          });\n\n          messageHandler.on(\"ready\", data => {\n            worker.removeEventListener(\"error\", onWorkerError);\n            if (this.destroyed) {\n              terminateEarly();\n              return; // worker was destroyed\n            }\n            try {\n              sendTest();\n            } catch (e) {\n              // We need fallback to a faked worker.\n              this._setupFakeWorker();\n            }\n          });\n\n          const sendTest = () => {\n            const testObj = new Uint8Array([\n              this.postMessageTransfers ? 255 : 0,\n            ]);\n            // Some versions of Opera throw a DATA_CLONE_ERR on serializing the\n            // typed array. Also, checking if we can use transfers.\n            try {\n              messageHandler.send(\"test\", testObj, [testObj.buffer]);\n            } catch (ex) {\n              warn(\"Cannot use postMessage transfers.\");\n              testObj[0] = 0;\n              messageHandler.send(\"test\", testObj);\n            }\n          };\n\n          // It might take time for worker to initialize (especially when AMD\n          // loader is used). We will try to send test immediately, and then\n          // when 'ready' message will arrive. The worker shall process only\n          // first received 'test'.\n          sendTest();\n          return;\n        } catch (e) {\n          info(\"The worker has been disabled.\");\n        }\n      }\n      // Either workers are disabled, not supported or have thrown an exception.\n      // Thus, we fallback to a faked worker.\n      this._setupFakeWorker();\n    }\n\n    _setupFakeWorker() {\n      if (!isWorkerDisabled) {\n        warn(\"Setting up fake worker.\");\n        isWorkerDisabled = true;\n      }\n\n      setupFakeWorkerGlobal()\n        .then(WorkerMessageHandler => {\n          if (this.destroyed) {\n            this._readyCapability.reject(new Error(\"Worker was destroyed\"));\n            return;\n          }\n          const port = new LoopbackPort();\n          this._port = port;\n\n          // All fake workers use the same port, making id unique.\n          const id = \"fake\" + nextFakeWorkerId++;\n\n          // If the main thread is our worker, setup the handling for the\n          // messages -- the main thread sends to it self.\n          const workerHandler = new MessageHandler(id + \"_worker\", id, port);\n          WorkerMessageHandler.setup(workerHandler, port);\n\n          const messageHandler = new MessageHandler(id, id + \"_worker\", port);\n          this._messageHandler = messageHandler;\n          this._readyCapability.resolve();\n          // Send global setting, e.g. verbosity level.\n          messageHandler.send(\"configure\", {\n            verbosity: this.verbosity,\n          });\n        })\n        .catch(reason => {\n          this._readyCapability.reject(\n            new Error(`Setting up fake worker failed: \"${reason.message}\".`)\n          );\n        });\n    }\n\n    /**\n     * Destroys the worker instance.\n     */\n    destroy() {\n      this.destroyed = true;\n      if (this._webWorker) {\n        // We need to terminate only web worker created resource.\n        this._webWorker.terminate();\n        this._webWorker = null;\n      }\n      pdfWorkerPorts.delete(this._port);\n      this._port = null;\n      if (this._messageHandler) {\n        this._messageHandler.destroy();\n        this._messageHandler = null;\n      }\n    }\n\n    /**\n     * @param {PDFWorkerParameters} params - The worker initialization\n     *                                       parameters.\n     */\n    static fromPort(params) {\n      if (!params || !params.port) {\n        throw new Error(\"PDFWorker.fromPort - invalid method signature.\");\n      }\n      if (pdfWorkerPorts.has(params.port)) {\n        return pdfWorkerPorts.get(params.port);\n      }\n      return new PDFWorker(params);\n    }\n\n    static getWorkerSrc() {\n      return getWorkerSrc();\n    }\n  }\n  return PDFWorker;\n})();\n\n/**\n * For internal use only.\n * @ignore\n */\nclass WorkerTransport {\n  constructor(messageHandler, loadingTask, networkStream, params) {\n    this.messageHandler = messageHandler;\n    this.loadingTask = loadingTask;\n    this.commonObjs = new PDFObjects();\n    this.fontLoader = new FontLoader({\n      docId: loadingTask.docId,\n      onUnsupportedFeature: this._onUnsupportedFeature.bind(this),\n    });\n    this._params = params;\n    this.CMapReaderFactory = new params.CMapReaderFactory({\n      baseUrl: params.cMapUrl,\n      isCompressed: params.cMapPacked,\n    });\n\n    this.destroyed = false;\n    this.destroyCapability = null;\n    this._passwordCapability = null;\n\n    this._networkStream = networkStream;\n    this._fullReader = null;\n    this._lastProgress = null;\n\n    this.pageCache = [];\n    this.pagePromises = [];\n    this.downloadInfoCapability = createPromiseCapability();\n\n    this.setupMessageHandler();\n  }\n\n  destroy() {\n    if (this.destroyCapability) {\n      return this.destroyCapability.promise;\n    }\n\n    this.destroyed = true;\n    this.destroyCapability = createPromiseCapability();\n\n    if (this._passwordCapability) {\n      this._passwordCapability.reject(\n        new Error(\"Worker was destroyed during onPassword callback\")\n      );\n    }\n\n    const waitOn = [];\n    // We need to wait for all renderings to be completed, e.g.\n    // timeout/rAF can take a long time.\n    this.pageCache.forEach(function (page) {\n      if (page) {\n        waitOn.push(page._destroy());\n      }\n    });\n    this.pageCache.length = 0;\n    this.pagePromises.length = 0;\n    // We also need to wait for the worker to finish its long running tasks.\n    const terminated = this.messageHandler.sendWithPromise(\"Terminate\", null);\n    waitOn.push(terminated);\n    Promise.all(waitOn).then(() => {\n      this.fontLoader.clear();\n      if (this._networkStream) {\n        this._networkStream.cancelAllRequests(\n          new AbortException(\"Worker was terminated.\")\n        );\n      }\n\n      if (this.messageHandler) {\n        this.messageHandler.destroy();\n        this.messageHandler = null;\n      }\n      this.destroyCapability.resolve();\n    }, this.destroyCapability.reject);\n    return this.destroyCapability.promise;\n  }\n\n  setupMessageHandler() {\n    const { messageHandler, loadingTask } = this;\n\n    messageHandler.on(\"GetReader\", (data, sink) => {\n      assert(\n        this._networkStream,\n        \"GetReader - no `IPDFStream` instance available.\"\n      );\n      this._fullReader = this._networkStream.getFullReader();\n      this._fullReader.onProgress = evt => {\n        this._lastProgress = {\n          loaded: evt.loaded,\n          total: evt.total,\n        };\n      };\n      sink.onPull = () => {\n        this._fullReader\n          .read()\n          .then(function ({ value, done }) {\n            if (done) {\n              sink.close();\n              return;\n            }\n            assert(\n              isArrayBuffer(value),\n              \"GetReader - expected an ArrayBuffer.\"\n            );\n            // Enqueue data chunk into sink, and transfer it\n            // to other side as `Transferable` object.\n            sink.enqueue(new Uint8Array(value), 1, [value]);\n          })\n          .catch(reason => {\n            sink.error(reason);\n          });\n      };\n\n      sink.onCancel = reason => {\n        this._fullReader.cancel(reason);\n      };\n    });\n\n    messageHandler.on(\"ReaderHeadersReady\", data => {\n      const headersCapability = createPromiseCapability();\n      const fullReader = this._fullReader;\n      fullReader.headersReady.then(() => {\n        // If stream or range are disabled, it's our only way to report\n        // loading progress.\n        if (!fullReader.isStreamingSupported || !fullReader.isRangeSupported) {\n          if (this._lastProgress && loadingTask.onProgress) {\n            loadingTask.onProgress(this._lastProgress);\n          }\n          fullReader.onProgress = evt => {\n            if (loadingTask.onProgress) {\n              loadingTask.onProgress({\n                loaded: evt.loaded,\n                total: evt.total,\n              });\n            }\n          };\n        }\n\n        headersCapability.resolve({\n          isStreamingSupported: fullReader.isStreamingSupported,\n          isRangeSupported: fullReader.isRangeSupported,\n          contentLength: fullReader.contentLength,\n        });\n      }, headersCapability.reject);\n\n      return headersCapability.promise;\n    });\n\n    messageHandler.on(\"GetRangeReader\", (data, sink) => {\n      assert(\n        this._networkStream,\n        \"GetRangeReader - no `IPDFStream` instance available.\"\n      );\n      const rangeReader = this._networkStream.getRangeReader(\n        data.begin,\n        data.end\n      );\n\n      // When streaming is enabled, it's possible that the data requested here\n      // has already been fetched via the `_fullRequestReader` implementation.\n      // However, given that the PDF data is loaded asynchronously on the\n      // main-thread and then sent via `postMessage` to the worker-thread,\n      // it may not have been available during parsing (hence the attempt to\n      // use range requests here).\n      //\n      // To avoid wasting time and resources here, we'll thus *not* dispatch\n      // range requests if the data was already loaded but has not been sent to\n      // the worker-thread yet (which will happen via the `_fullRequestReader`).\n      if (!rangeReader) {\n        sink.close();\n        return;\n      }\n\n      sink.onPull = () => {\n        rangeReader\n          .read()\n          .then(function ({ value, done }) {\n            if (done) {\n              sink.close();\n              return;\n            }\n            assert(\n              isArrayBuffer(value),\n              \"GetRangeReader - expected an ArrayBuffer.\"\n            );\n            sink.enqueue(new Uint8Array(value), 1, [value]);\n          })\n          .catch(reason => {\n            sink.error(reason);\n          });\n      };\n\n      sink.onCancel = reason => {\n        rangeReader.cancel(reason);\n      };\n    });\n\n    messageHandler.on(\"GetDoc\", ({ pdfInfo }) => {\n      this._numPages = pdfInfo.numPages;\n      loadingTask._capability.resolve(new PDFDocumentProxy(pdfInfo, this));\n    });\n\n    messageHandler.on(\"DocException\", function (ex) {\n      let reason;\n      switch (ex.name) {\n        case \"PasswordException\":\n          reason = new PasswordException(ex.message, ex.code);\n          break;\n        case \"InvalidPDFException\":\n          reason = new InvalidPDFException(ex.message);\n          break;\n        case \"MissingPDFException\":\n          reason = new MissingPDFException(ex.message);\n          break;\n        case \"UnexpectedResponseException\":\n          reason = new UnexpectedResponseException(ex.message, ex.status);\n          break;\n        case \"UnknownErrorException\":\n          reason = new UnknownErrorException(ex.message, ex.details);\n          break;\n      }\n      if (\n        typeof PDFJSDev === \"undefined\" ||\n        PDFJSDev.test(\"!PRODUCTION || TESTING\")\n      ) {\n        assert(reason instanceof Error, \"DocException: expected an Error.\");\n      }\n      loadingTask._capability.reject(reason);\n    });\n\n    messageHandler.on(\"PasswordRequest\", exception => {\n      this._passwordCapability = createPromiseCapability();\n\n      if (loadingTask.onPassword) {\n        const updatePassword = password => {\n          this._passwordCapability.resolve({\n            password,\n          });\n        };\n        try {\n          loadingTask.onPassword(updatePassword, exception.code);\n        } catch (ex) {\n          this._passwordCapability.reject(ex);\n        }\n      } else {\n        this._passwordCapability.reject(\n          new PasswordException(exception.message, exception.code)\n        );\n      }\n      return this._passwordCapability.promise;\n    });\n\n    messageHandler.on(\"DataLoaded\", data => {\n      // For consistency: Ensure that progress is always reported when the\n      // entire PDF file has been loaded, regardless of how it was fetched.\n      if (loadingTask.onProgress) {\n        loadingTask.onProgress({\n          loaded: data.length,\n          total: data.length,\n        });\n      }\n      this.downloadInfoCapability.resolve(data);\n    });\n\n    messageHandler.on(\"StartRenderPage\", data => {\n      if (this.destroyed) {\n        return; // Ignore any pending requests if the worker was terminated.\n      }\n\n      const page = this.pageCache[data.pageIndex];\n      page._startRenderPage(data.transparency, data.intent);\n    });\n\n    messageHandler.on(\"commonobj\", data => {\n      if (this.destroyed) {\n        return; // Ignore any pending requests if the worker was terminated.\n      }\n\n      const [id, type, exportedData] = data;\n      if (this.commonObjs.has(id)) {\n        return;\n      }\n\n      switch (type) {\n        case \"Font\":\n          const params = this._params;\n\n          if (\"error\" in exportedData) {\n            const exportedError = exportedData.error;\n            warn(`Error during font loading: ${exportedError}`);\n            this.commonObjs.resolve(id, exportedError);\n            break;\n          }\n\n          let fontRegistry = null;\n          if (\n            params.pdfBug &&\n            globalThis.FontInspector &&\n            globalThis.FontInspector.enabled\n          ) {\n            fontRegistry = {\n              registerFont(font, url) {\n                globalThis.FontInspector.fontAdded(font, url);\n              },\n            };\n          }\n          const font = new FontFaceObject(exportedData, {\n            isEvalSupported: params.isEvalSupported,\n            disableFontFace: params.disableFontFace,\n            ignoreErrors: params.ignoreErrors,\n            onUnsupportedFeature: this._onUnsupportedFeature.bind(this),\n            fontRegistry,\n          });\n\n          this.fontLoader\n            .bind(font)\n            .catch(reason => {\n              return messageHandler.sendWithPromise(\"FontFallback\", { id });\n            })\n            .finally(() => {\n              if (!params.fontExtraProperties && font.data) {\n                // Immediately release the `font.data` property once the font\n                // has been attached to the DOM, since it's no longer needed,\n                // rather than waiting for a `PDFDocumentProxy.cleanup` call.\n                // Since `font.data` could be very large, e.g. in some cases\n                // multiple megabytes, this will help reduce memory usage.\n                font.data = null;\n              }\n              this.commonObjs.resolve(id, font);\n            });\n          break;\n        case \"FontPath\":\n        case \"FontType3Res\":\n        case \"Image\":\n          this.commonObjs.resolve(id, exportedData);\n          break;\n        default:\n          throw new Error(`Got unknown common object type ${type}`);\n      }\n    });\n\n    messageHandler.on(\"obj\", data => {\n      if (this.destroyed) {\n        // Ignore any pending requests if the worker was terminated.\n        return undefined;\n      }\n\n      const [id, pageIndex, type, imageData] = data;\n      const pageProxy = this.pageCache[pageIndex];\n      if (pageProxy.objs.has(id)) {\n        return undefined;\n      }\n\n      switch (type) {\n        case \"Image\":\n          pageProxy.objs.resolve(id, imageData);\n\n          // Heuristic that will allow us not to store large data.\n          const MAX_IMAGE_SIZE_TO_STORE = 8000000;\n          if (\n            imageData &&\n            \"data\" in imageData &&\n            imageData.data.length > MAX_IMAGE_SIZE_TO_STORE\n          ) {\n            pageProxy.cleanupAfterRender = true;\n          }\n          break;\n        default:\n          throw new Error(`Got unknown object type ${type}`);\n      }\n      return undefined;\n    });\n\n    messageHandler.on(\"DocProgress\", data => {\n      if (this.destroyed) {\n        return; // Ignore any pending requests if the worker was terminated.\n      }\n\n      if (loadingTask.onProgress) {\n        loadingTask.onProgress({\n          loaded: data.loaded,\n          total: data.total,\n        });\n      }\n    });\n\n    messageHandler.on(\n      \"UnsupportedFeature\",\n      this._onUnsupportedFeature.bind(this)\n    );\n\n    messageHandler.on(\"FetchBuiltInCMap\", (data, sink) => {\n      if (this.destroyed) {\n        sink.error(new Error(\"Worker was destroyed\"));\n        return;\n      }\n      let fetched = false;\n\n      sink.onPull = () => {\n        if (fetched) {\n          sink.close();\n          return;\n        }\n        fetched = true;\n\n        this.CMapReaderFactory.fetch(data)\n          .then(function (builtInCMap) {\n            sink.enqueue(builtInCMap, 1, [builtInCMap.cMapData.buffer]);\n          })\n          .catch(function (reason) {\n            sink.error(reason);\n          });\n      };\n    });\n  }\n\n  _onUnsupportedFeature({ featureId }) {\n    if (this.destroyed) {\n      return; // Ignore any pending requests if the worker was terminated.\n    }\n    if (this.loadingTask.onUnsupportedFeature) {\n      this.loadingTask.onUnsupportedFeature(featureId);\n    }\n  }\n\n  getData() {\n    return this.messageHandler.sendWithPromise(\"GetData\", null);\n  }\n\n  getPage(pageNumber) {\n    if (\n      !Number.isInteger(pageNumber) ||\n      pageNumber <= 0 ||\n      pageNumber > this._numPages\n    ) {\n      return Promise.reject(new Error(\"Invalid page request\"));\n    }\n\n    const pageIndex = pageNumber - 1;\n    if (pageIndex in this.pagePromises) {\n      return this.pagePromises[pageIndex];\n    }\n    const promise = this.messageHandler\n      .sendWithPromise(\"GetPage\", {\n        pageIndex,\n      })\n      .then(pageInfo => {\n        if (this.destroyed) {\n          throw new Error(\"Transport destroyed\");\n        }\n        const page = new PDFPageProxy(\n          pageIndex,\n          pageInfo,\n          this,\n          this._params.pdfBug\n        );\n        this.pageCache[pageIndex] = page;\n        return page;\n      });\n    this.pagePromises[pageIndex] = promise;\n    return promise;\n  }\n\n  getPageIndex(ref) {\n    return this.messageHandler\n      .sendWithPromise(\"GetPageIndex\", {\n        ref,\n      })\n      .catch(function (reason) {\n        return Promise.reject(new Error(reason));\n      });\n  }\n\n  getAnnotations(pageIndex, intent) {\n    return this.messageHandler.sendWithPromise(\"GetAnnotations\", {\n      pageIndex,\n      intent,\n    });\n  }\n\n  getDestinations() {\n    return this.messageHandler.sendWithPromise(\"GetDestinations\", null);\n  }\n\n  getDestination(id) {\n    if (typeof id !== \"string\") {\n      return Promise.reject(new Error(\"Invalid destination request.\"));\n    }\n    return this.messageHandler.sendWithPromise(\"GetDestination\", {\n      id,\n    });\n  }\n\n  getPageLabels() {\n    return this.messageHandler.sendWithPromise(\"GetPageLabels\", null);\n  }\n\n  getPageLayout() {\n    return this.messageHandler.sendWithPromise(\"GetPageLayout\", null);\n  }\n\n  getPageMode() {\n    return this.messageHandler.sendWithPromise(\"GetPageMode\", null);\n  }\n\n  getViewerPreferences() {\n    return this.messageHandler.sendWithPromise(\"GetViewerPreferences\", null);\n  }\n\n  getOpenAction() {\n    return this.messageHandler.sendWithPromise(\"GetOpenAction\", null);\n  }\n\n  getAttachments() {\n    return this.messageHandler.sendWithPromise(\"GetAttachments\", null);\n  }\n\n  getJavaScript() {\n    return this.messageHandler.sendWithPromise(\"GetJavaScript\", null);\n  }\n\n  getOutline() {\n    return this.messageHandler.sendWithPromise(\"GetOutline\", null);\n  }\n\n  getPermissions() {\n    return this.messageHandler.sendWithPromise(\"GetPermissions\", null);\n  }\n\n  getMetadata() {\n    return this.messageHandler\n      .sendWithPromise(\"GetMetadata\", null)\n      .then(results => {\n        return {\n          info: results[0],\n          metadata: results[1] ? new Metadata(results[1]) : null,\n          contentDispositionFilename: this._fullReader\n            ? this._fullReader.filename\n            : null,\n        };\n      });\n  }\n\n  getStats() {\n    return this.messageHandler.sendWithPromise(\"GetStats\", null);\n  }\n\n  startCleanup() {\n    return this.messageHandler.sendWithPromise(\"Cleanup\", null).then(() => {\n      for (let i = 0, ii = this.pageCache.length; i < ii; i++) {\n        const page = this.pageCache[i];\n        if (page) {\n          const cleanupSuccessful = page.cleanup();\n\n          if (!cleanupSuccessful) {\n            throw new Error(\n              `startCleanup: Page ${i + 1} is currently rendering.`\n            );\n          }\n        }\n      }\n      this.commonObjs.clear();\n      this.fontLoader.clear();\n    });\n  }\n\n  get loadingParams() {\n    const params = this._params;\n    return shadow(this, \"loadingParams\", {\n      disableAutoFetch: params.disableAutoFetch,\n      disableFontFace: params.disableFontFace,\n    });\n  }\n}\n\n/**\n * A PDF document and page is built of many objects. E.g. there are objects for\n * fonts, images, rendering code, etc. These objects may get processed inside of\n * a worker. This class implements some basic methods to manage these objects.\n * @ignore\n */\nclass PDFObjects {\n  constructor() {\n    this._objs = Object.create(null);\n  }\n\n  /**\n   * Ensures there is an object defined for `objId`.\n   * @private\n   */\n  _ensureObj(objId) {\n    if (this._objs[objId]) {\n      return this._objs[objId];\n    }\n    return (this._objs[objId] = {\n      capability: createPromiseCapability(),\n      data: null,\n      resolved: false,\n    });\n  }\n\n  /**\n   * If called *without* callback, this returns the data of `objId` but the\n   * object needs to be resolved. If it isn't, this method throws.\n   *\n   * If called *with* a callback, the callback is called with the data of the\n   * object once the object is resolved. That means, if you call this method\n   * and the object is already resolved, the callback gets called right away.\n   */\n  get(objId, callback = null) {\n    // If there is a callback, then the get can be async and the object is\n    // not required to be resolved right now.\n    if (callback) {\n      this._ensureObj(objId).capability.promise.then(callback);\n      return null;\n    }\n    // If there isn't a callback, the user expects to get the resolved data\n    // directly.\n    const obj = this._objs[objId];\n    // If there isn't an object yet or the object isn't resolved, then the\n    // data isn't ready yet!\n    if (!obj || !obj.resolved) {\n      throw new Error(`Requesting object that isn't resolved yet ${objId}.`);\n    }\n    return obj.data;\n  }\n\n  has(objId) {\n    const obj = this._objs[objId];\n    return obj ? obj.resolved : false;\n  }\n\n  /**\n   * Resolves the object `objId` with optional `data`.\n   */\n  resolve(objId, data) {\n    const obj = this._ensureObj(objId);\n\n    obj.resolved = true;\n    obj.data = data;\n    obj.capability.resolve(data);\n  }\n\n  clear() {\n    this._objs = Object.create(null);\n  }\n}\n\n/**\n * Allows controlling of the rendering tasks.\n * @alias RenderTask\n */\nclass RenderTask {\n  constructor(internalRenderTask) {\n    this._internalRenderTask = internalRenderTask;\n\n    /**\n     * Callback for incremental rendering -- a function that will be called\n     * each time the rendering is paused.  To continue rendering call the\n     * function that is the first argument to the callback.\n     * @type {function}\n     */\n    this.onContinue = null;\n  }\n\n  /**\n   * Promise for rendering task completion.\n   * @type {Promise}\n   */\n  get promise() {\n    return this._internalRenderTask.capability.promise;\n  }\n\n  /**\n   * Cancels the rendering task. If the task is currently rendering it will\n   * not be cancelled until graphics pauses with a timeout. The promise that\n   * this object extends will be rejected when cancelled.\n   */\n  cancel() {\n    this._internalRenderTask.cancel();\n  }\n}\n\n/**\n * For internal use only.\n * @ignore\n */\nconst InternalRenderTask = (function InternalRenderTaskClosure() {\n  const canvasInRendering = new WeakSet();\n\n  // eslint-disable-next-line no-shadow\n  class InternalRenderTask {\n    constructor({\n      callback,\n      params,\n      objs,\n      commonObjs,\n      operatorList,\n      pageIndex,\n      canvasFactory,\n      webGLContext,\n      useRequestAnimationFrame = false,\n      pdfBug = false,\n    }) {\n      this.callback = callback;\n      this.params = params;\n      this.objs = objs;\n      this.commonObjs = commonObjs;\n      this.operatorListIdx = null;\n      this.operatorList = operatorList;\n      this._pageIndex = pageIndex;\n      this.canvasFactory = canvasFactory;\n      this.webGLContext = webGLContext;\n      this._pdfBug = pdfBug;\n\n      this.running = false;\n      this.graphicsReadyCallback = null;\n      this.graphicsReady = false;\n      this._useRequestAnimationFrame =\n        useRequestAnimationFrame === true && typeof window !== \"undefined\";\n      this.cancelled = false;\n      this.capability = createPromiseCapability();\n      this.task = new RenderTask(this);\n      // caching this-bound methods\n      this._continueBound = this._continue.bind(this);\n      this._scheduleNextBound = this._scheduleNext.bind(this);\n      this._nextBound = this._next.bind(this);\n      this._canvas = params.canvasContext.canvas;\n    }\n\n    initializeGraphics(transparency = false) {\n      if (this.cancelled) {\n        return;\n      }\n      if (this._canvas) {\n        if (canvasInRendering.has(this._canvas)) {\n          throw new Error(\n            \"Cannot use the same canvas during multiple render() operations. \" +\n              \"Use different canvas or ensure previous operations were \" +\n              \"cancelled or completed.\"\n          );\n        }\n        canvasInRendering.add(this._canvas);\n      }\n\n      if (\n        this._pdfBug &&\n        globalThis.StepperManager &&\n        globalThis.StepperManager.enabled\n      ) {\n        this.stepper = globalThis.StepperManager.create(this._pageIndex);\n        this.stepper.init(this.operatorList);\n        this.stepper.nextBreakPoint = this.stepper.getNextBreakPoint();\n      }\n      const {\n        canvasContext,\n        viewport,\n        transform,\n        imageLayer,\n        background,\n      } = this.params;\n\n      this.gfx = new CanvasGraphics(\n        canvasContext,\n        this.commonObjs,\n        this.objs,\n        this.canvasFactory,\n        this.webGLContext,\n        imageLayer\n      );\n      this.gfx.beginDrawing({\n        transform,\n        viewport,\n        transparency,\n        background,\n      });\n      this.operatorListIdx = 0;\n      this.graphicsReady = true;\n      if (this.graphicsReadyCallback) {\n        this.graphicsReadyCallback();\n      }\n    }\n\n    cancel(error = null) {\n      this.running = false;\n      this.cancelled = true;\n      if (this.gfx) {\n        this.gfx.endDrawing();\n      }\n      if (this._canvas) {\n        canvasInRendering.delete(this._canvas);\n      }\n      this.callback(\n        error ||\n          new RenderingCancelledException(\n            `Rendering cancelled, page ${this._pageIndex + 1}`,\n            \"canvas\"\n          )\n      );\n    }\n\n    operatorListChanged() {\n      if (!this.graphicsReady) {\n        if (!this.graphicsReadyCallback) {\n          this.graphicsReadyCallback = this._continueBound;\n        }\n        return;\n      }\n\n      if (this.stepper) {\n        this.stepper.updateOperatorList(this.operatorList);\n      }\n\n      if (this.running) {\n        return;\n      }\n      this._continue();\n    }\n\n    _continue() {\n      this.running = true;\n      if (this.cancelled) {\n        return;\n      }\n      if (this.task.onContinue) {\n        this.task.onContinue(this._scheduleNextBound);\n      } else {\n        this._scheduleNext();\n      }\n    }\n\n    _scheduleNext() {\n      if (this._useRequestAnimationFrame) {\n        window.requestAnimationFrame(() => {\n          this._nextBound().catch(this.cancel.bind(this));\n        });\n      } else {\n        Promise.resolve().then(this._nextBound).catch(this.cancel.bind(this));\n      }\n    }\n\n    async _next() {\n      if (this.cancelled) {\n        return;\n      }\n      this.operatorListIdx = this.gfx.executeOperatorList(\n        this.operatorList,\n        this.operatorListIdx,\n        this._continueBound,\n        this.stepper\n      );\n      if (this.operatorListIdx === this.operatorList.argsArray.length) {\n        this.running = false;\n        if (this.operatorList.lastChunk) {\n          this.gfx.endDrawing();\n          if (this._canvas) {\n            canvasInRendering.delete(this._canvas);\n          }\n          this.callback();\n        }\n      }\n    }\n  }\n  return InternalRenderTask;\n})();\n\nconst version =\n  typeof PDFJSDev !== \"undefined\" ? PDFJSDev.eval(\"BUNDLE_VERSION\") : null;\nconst build =\n  typeof PDFJSDev !== \"undefined\" ? PDFJSDev.eval(\"BUNDLE_BUILD\") : null;\n\nexport {\n  getDocument,\n  LoopbackPort,\n  PDFDataRangeTransport,\n  PDFWorker,\n  PDFDocumentProxy,\n  PDFPageProxy,\n  setPDFNetworkStreamFactory,\n  version,\n  build,\n};\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport {\n  assert,\n  bytesToString,\n  IsEvalSupportedCached,\n  shadow,\n  string32,\n  unreachable,\n  UNSUPPORTED_FEATURES,\n  warn,\n} from \"../shared/util.js\";\n\nclass BaseFontLoader {\n  constructor({ docId, onUnsupportedFeature }) {\n    if (this.constructor === BaseFontLoader) {\n      unreachable(\"Cannot initialize BaseFontLoader.\");\n    }\n    this.docId = docId;\n    this._onUnsupportedFeature = onUnsupportedFeature;\n\n    this.nativeFontFaces = [];\n    this.styleElement = null;\n  }\n\n  addNativeFontFace(nativeFontFace) {\n    this.nativeFontFaces.push(nativeFontFace);\n    document.fonts.add(nativeFontFace);\n  }\n\n  insertRule(rule) {\n    let styleElement = this.styleElement;\n    if (!styleElement) {\n      styleElement = this.styleElement = document.createElement(\"style\");\n      styleElement.id = `PDFJS_FONT_STYLE_TAG_${this.docId}`;\n      document.documentElement\n        .getElementsByTagName(\"head\")[0]\n        .appendChild(styleElement);\n    }\n\n    const styleSheet = styleElement.sheet;\n    styleSheet.insertRule(rule, styleSheet.cssRules.length);\n  }\n\n  clear() {\n    this.nativeFontFaces.forEach(function (nativeFontFace) {\n      document.fonts.delete(nativeFontFace);\n    });\n    this.nativeFontFaces.length = 0;\n\n    if (this.styleElement) {\n      // Note: ChildNode.remove doesn't throw if the parentNode is undefined.\n      this.styleElement.remove();\n      this.styleElement = null;\n    }\n  }\n\n  async bind(font) {\n    // Add the font to the DOM only once; skip if the font is already loaded.\n    if (font.attached || font.missingFile) {\n      return;\n    }\n    font.attached = true;\n\n    if (this.isFontLoadingAPISupported) {\n      const nativeFontFace = font.createNativeFontFace();\n      if (nativeFontFace) {\n        this.addNativeFontFace(nativeFontFace);\n        try {\n          await nativeFontFace.loaded;\n        } catch (ex) {\n          this._onUnsupportedFeature({\n            featureId: UNSUPPORTED_FEATURES.errorFontLoadNative,\n          });\n          warn(`Failed to load font '${nativeFontFace.family}': '${ex}'.`);\n\n          // When font loading failed, fall back to the built-in font renderer.\n          font.disableFontFace = true;\n          throw ex;\n        }\n      }\n      return; // The font was, asynchronously, loaded.\n    }\n\n    // !this.isFontLoadingAPISupported\n    const rule = font.createFontFaceRule();\n    if (rule) {\n      this.insertRule(rule);\n\n      if (this.isSyncFontLoadingSupported) {\n        return; // The font was, synchronously, loaded.\n      }\n      await new Promise(resolve => {\n        const request = this._queueLoadingCallback(resolve);\n        this._prepareFontLoadEvent([rule], [font], request);\n      });\n      // The font was, asynchronously, loaded.\n    }\n  }\n\n  _queueLoadingCallback(callback) {\n    unreachable(\"Abstract method `_queueLoadingCallback`.\");\n  }\n\n  get isFontLoadingAPISupported() {\n    const supported = typeof document !== \"undefined\" && !!document.fonts;\n    return shadow(this, \"isFontLoadingAPISupported\", supported);\n  }\n\n  // eslint-disable-next-line getter-return\n  get isSyncFontLoadingSupported() {\n    unreachable(\"Abstract method `isSyncFontLoadingSupported`.\");\n  }\n\n  // eslint-disable-next-line getter-return\n  get _loadTestFont() {\n    unreachable(\"Abstract method `_loadTestFont`.\");\n  }\n\n  _prepareFontLoadEvent(rules, fontsToLoad, request) {\n    unreachable(\"Abstract method `_prepareFontLoadEvent`.\");\n  }\n}\n\nlet FontLoader;\nif (typeof PDFJSDev !== \"undefined\" && PDFJSDev.test(\"MOZCENTRAL\")) {\n  FontLoader = class MozcentralFontLoader extends BaseFontLoader {\n    get isSyncFontLoadingSupported() {\n      return shadow(this, \"isSyncFontLoadingSupported\", true);\n    }\n  };\n} else {\n  // PDFJSDev.test('CHROME || GENERIC')\n\n  FontLoader = class GenericFontLoader extends BaseFontLoader {\n    constructor(docId) {\n      super(docId);\n      this.loadingContext = {\n        requests: [],\n        nextRequestId: 0,\n      };\n      this.loadTestFontId = 0;\n    }\n\n    get isSyncFontLoadingSupported() {\n      let supported = false;\n      if (typeof PDFJSDev === \"undefined\" || !PDFJSDev.test(\"CHROME\")) {\n        if (typeof navigator === \"undefined\") {\n          // Node.js - we can pretend that sync font loading is supported.\n          supported = true;\n        } else {\n          // User agent string sniffing is bad, but there is no reliable way to\n          // tell if the font is fully loaded and ready to be used with canvas.\n          const m = /Mozilla\\/5.0.*?rv:(\\d+).*? Gecko/.exec(\n            navigator.userAgent\n          );\n          if (m && m[1] >= 14) {\n            supported = true;\n          }\n          // TODO - other browsers...\n        }\n      }\n      return shadow(this, \"isSyncFontLoadingSupported\", supported);\n    }\n\n    _queueLoadingCallback(callback) {\n      function completeRequest() {\n        assert(!request.done, \"completeRequest() cannot be called twice.\");\n        request.done = true;\n\n        // Sending all completed requests in order of how they were queued.\n        while (context.requests.length > 0 && context.requests[0].done) {\n          const otherRequest = context.requests.shift();\n          setTimeout(otherRequest.callback, 0);\n        }\n      }\n\n      const context = this.loadingContext;\n      const request = {\n        id: `pdfjs-font-loading-${context.nextRequestId++}`,\n        done: false,\n        complete: completeRequest,\n        callback,\n      };\n      context.requests.push(request);\n      return request;\n    }\n\n    get _loadTestFont() {\n      const getLoadTestFont = function () {\n        // This is a CFF font with 1 glyph for '.' that fills its entire width\n        // and height.\n        return atob(\n          \"T1RUTwALAIAAAwAwQ0ZGIDHtZg4AAAOYAAAAgUZGVE1lkzZwAAAEHAAAABxHREVGABQA\" +\n            \"FQAABDgAAAAeT1MvMlYNYwkAAAEgAAAAYGNtYXABDQLUAAACNAAAAUJoZWFk/xVFDQAA\" +\n            \"ALwAAAA2aGhlYQdkA+oAAAD0AAAAJGhtdHgD6AAAAAAEWAAAAAZtYXhwAAJQAAAAARgA\" +\n            \"AAAGbmFtZVjmdH4AAAGAAAAAsXBvc3T/hgAzAAADeAAAACAAAQAAAAEAALZRFsRfDzz1\" +\n            \"AAsD6AAAAADOBOTLAAAAAM4KHDwAAAAAA+gDIQAAAAgAAgAAAAAAAAABAAADIQAAAFoD\" +\n            \"6AAAAAAD6AABAAAAAAAAAAAAAAAAAAAAAQAAUAAAAgAAAAQD6AH0AAUAAAKKArwAAACM\" +\n            \"AooCvAAAAeAAMQECAAACAAYJAAAAAAAAAAAAAQAAAAAAAAAAAAAAAFBmRWQAwAAuAC4D\" +\n            \"IP84AFoDIQAAAAAAAQAAAAAAAAAAACAAIAABAAAADgCuAAEAAAAAAAAAAQAAAAEAAAAA\" +\n            \"AAEAAQAAAAEAAAAAAAIAAQAAAAEAAAAAAAMAAQAAAAEAAAAAAAQAAQAAAAEAAAAAAAUA\" +\n            \"AQAAAAEAAAAAAAYAAQAAAAMAAQQJAAAAAgABAAMAAQQJAAEAAgABAAMAAQQJAAIAAgAB\" +\n            \"AAMAAQQJAAMAAgABAAMAAQQJAAQAAgABAAMAAQQJAAUAAgABAAMAAQQJAAYAAgABWABY\" +\n            \"AAAAAAAAAwAAAAMAAAAcAAEAAAAAADwAAwABAAAAHAAEACAAAAAEAAQAAQAAAC7//wAA\" +\n            \"AC7////TAAEAAAAAAAABBgAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\" +\n            \"AAAAAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\" +\n            \"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\" +\n            \"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\" +\n            \"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\" +\n            \"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMAAAAAAAD/gwAyAAAAAQAAAAAAAAAAAAAAAAAA\" +\n            \"AAABAAQEAAEBAQJYAAEBASH4DwD4GwHEAvgcA/gXBIwMAYuL+nz5tQXkD5j3CBLnEQAC\" +\n            \"AQEBIVhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYAAABAQAADwACAQEEE/t3\" +\n            \"Dov6fAH6fAT+fPp8+nwHDosMCvm1Cvm1DAz6fBQAAAAAAAABAAAAAMmJbzEAAAAAzgTj\" +\n            \"FQAAAADOBOQpAAEAAAAAAAAADAAUAAQAAAABAAAAAgABAAAAAAAAAAAD6AAAAAAAAA==\"\n        );\n      };\n      return shadow(this, \"_loadTestFont\", getLoadTestFont());\n    }\n\n    _prepareFontLoadEvent(rules, fonts, request) {\n      /** Hack begin */\n      // There's currently no event when a font has finished downloading so the\n      // following code is a dirty hack to 'guess' when a font is ready.\n      // It's assumed fonts are loaded in order, so add a known test font after\n      // the desired fonts and then test for the loading of that test font.\n\n      function int32(data, offset) {\n        return (\n          (data.charCodeAt(offset) << 24) |\n          (data.charCodeAt(offset + 1) << 16) |\n          (data.charCodeAt(offset + 2) << 8) |\n          (data.charCodeAt(offset + 3) & 0xff)\n        );\n      }\n      function spliceString(s, offset, remove, insert) {\n        const chunk1 = s.substring(0, offset);\n        const chunk2 = s.substring(offset + remove);\n        return chunk1 + insert + chunk2;\n      }\n      let i, ii;\n\n      // The temporary canvas is used to determine if fonts are loaded.\n      const canvas = document.createElement(\"canvas\");\n      canvas.width = 1;\n      canvas.height = 1;\n      const ctx = canvas.getContext(\"2d\");\n\n      let called = 0;\n      function isFontReady(name, callback) {\n        called++;\n        // With setTimeout clamping this gives the font ~100ms to load.\n        if (called > 30) {\n          warn(\"Load test font never loaded.\");\n          callback();\n          return;\n        }\n        ctx.font = \"30px \" + name;\n        ctx.fillText(\".\", 0, 20);\n        const imageData = ctx.getImageData(0, 0, 1, 1);\n        if (imageData.data[3] > 0) {\n          callback();\n          return;\n        }\n        setTimeout(isFontReady.bind(null, name, callback));\n      }\n\n      const loadTestFontId = `lt${Date.now()}${this.loadTestFontId++}`;\n      // Chromium seems to cache fonts based on a hash of the actual font data,\n      // so the font must be modified for each load test else it will appear to\n      // be loaded already.\n      // TODO: This could maybe be made faster by avoiding the btoa of the full\n      // font by splitting it in chunks before hand and padding the font id.\n      let data = this._loadTestFont;\n      const COMMENT_OFFSET = 976; // has to be on 4 byte boundary (for checksum)\n      data = spliceString(\n        data,\n        COMMENT_OFFSET,\n        loadTestFontId.length,\n        loadTestFontId\n      );\n      // CFF checksum is important for IE, adjusting it\n      const CFF_CHECKSUM_OFFSET = 16;\n      const XXXX_VALUE = 0x58585858; // the \"comment\" filled with 'X'\n      let checksum = int32(data, CFF_CHECKSUM_OFFSET);\n      for (i = 0, ii = loadTestFontId.length - 3; i < ii; i += 4) {\n        checksum = (checksum - XXXX_VALUE + int32(loadTestFontId, i)) | 0;\n      }\n      if (i < loadTestFontId.length) {\n        // align to 4 bytes boundary\n        checksum =\n          (checksum - XXXX_VALUE + int32(loadTestFontId + \"XXX\", i)) | 0;\n      }\n      data = spliceString(data, CFF_CHECKSUM_OFFSET, 4, string32(checksum));\n\n      const url = `url(data:font/opentype;base64,${btoa(data)});`;\n      const rule = `@font-face {font-family:\"${loadTestFontId}\";src:${url}}`;\n      this.insertRule(rule);\n\n      const names = [];\n      for (i = 0, ii = fonts.length; i < ii; i++) {\n        names.push(fonts[i].loadedName);\n      }\n      names.push(loadTestFontId);\n\n      const div = document.createElement(\"div\");\n      div.style.visibility = \"hidden\";\n      div.style.width = div.style.height = \"10px\";\n      div.style.position = \"absolute\";\n      div.style.top = div.style.left = \"0px\";\n\n      for (i = 0, ii = names.length; i < ii; ++i) {\n        const span = document.createElement(\"span\");\n        span.textContent = \"Hi\";\n        span.style.fontFamily = names[i];\n        div.appendChild(span);\n      }\n      document.body.appendChild(div);\n\n      isFontReady(loadTestFontId, function () {\n        document.body.removeChild(div);\n        request.complete();\n      });\n      /** Hack end */\n    }\n  };\n} // End of PDFJSDev.test('CHROME || GENERIC')\n\nclass FontFaceObject {\n  constructor(\n    translatedData,\n    {\n      isEvalSupported = true,\n      disableFontFace = false,\n      ignoreErrors = false,\n      onUnsupportedFeature = null,\n      fontRegistry = null,\n    }\n  ) {\n    this.compiledGlyphs = Object.create(null);\n    // importing translated data\n    for (const i in translatedData) {\n      this[i] = translatedData[i];\n    }\n    this.isEvalSupported = isEvalSupported !== false;\n    this.disableFontFace = disableFontFace === true;\n    this.ignoreErrors = ignoreErrors === true;\n    this._onUnsupportedFeature = onUnsupportedFeature;\n    this.fontRegistry = fontRegistry;\n  }\n\n  createNativeFontFace() {\n    if (!this.data || this.disableFontFace) {\n      return null;\n    }\n    const nativeFontFace = new FontFace(this.loadedName, this.data, {});\n\n    if (this.fontRegistry) {\n      this.fontRegistry.registerFont(this);\n    }\n    return nativeFontFace;\n  }\n\n  createFontFaceRule() {\n    if (!this.data || this.disableFontFace) {\n      return null;\n    }\n    const data = bytesToString(new Uint8Array(this.data));\n    // Add the @font-face rule to the document.\n    const url = `url(data:${this.mimetype};base64,${btoa(data)});`;\n    const rule = `@font-face {font-family:\"${this.loadedName}\";src:${url}}`;\n\n    if (this.fontRegistry) {\n      this.fontRegistry.registerFont(this, url);\n    }\n    return rule;\n  }\n\n  getPathGenerator(objs, character) {\n    if (this.compiledGlyphs[character] !== undefined) {\n      return this.compiledGlyphs[character];\n    }\n\n    let cmds, current;\n    try {\n      cmds = objs.get(this.loadedName + \"_path_\" + character);\n    } catch (ex) {\n      if (!this.ignoreErrors) {\n        throw ex;\n      }\n      if (this._onUnsupportedFeature) {\n        this._onUnsupportedFeature({\n          featureId: UNSUPPORTED_FEATURES.errorFontGetPath,\n        });\n      }\n      warn(`getPathGenerator - ignoring character: \"${ex}\".`);\n\n      return (this.compiledGlyphs[character] = function (c, size) {\n        // No-op function, to allow rendering to continue.\n      });\n    }\n\n    // If we can, compile cmds into JS for MAXIMUM SPEED...\n    if (this.isEvalSupported && IsEvalSupportedCached.value) {\n      let args,\n        js = \"\";\n      for (let i = 0, ii = cmds.length; i < ii; i++) {\n        current = cmds[i];\n\n        if (current.args !== undefined) {\n          args = current.args.join(\",\");\n        } else {\n          args = \"\";\n        }\n        js += \"c.\" + current.cmd + \"(\" + args + \");\\n\";\n      }\n      // eslint-disable-next-line no-new-func\n      return (this.compiledGlyphs[character] = new Function(\"c\", \"size\", js));\n    }\n    // ... but fall back on using Function.prototype.apply() if we're\n    // blocked from using eval() for whatever reason (like CSP policies).\n    return (this.compiledGlyphs[character] = function (c, size) {\n      for (let i = 0, ii = cmds.length; i < ii; i++) {\n        current = cmds[i];\n\n        if (current.cmd === \"scale\") {\n          current.args = [size, -size];\n        }\n        c[current.cmd].apply(c, current.args);\n      }\n    });\n  }\n}\n\nexport { FontFaceObject, FontLoader };\n","/* Copyright 2018 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { isNodeJS } from \"../shared/is_node.js\";\n\nconst compatibilityParams = Object.create(null);\nif (typeof PDFJSDev === \"undefined\" || PDFJSDev.test(\"GENERIC\")) {\n  // Support: Node.js\n  (function checkFontFace() {\n    // Node.js is missing native support for `@font-face`.\n    if (isNodeJS) {\n      compatibilityParams.disableFontFace = true;\n    }\n  })();\n}\nconst apiCompatibilityParams = Object.freeze(compatibilityParams);\n\nexport { apiCompatibilityParams };\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport {\n  FONT_IDENTITY_MATRIX,\n  IDENTITY_MATRIX,\n  ImageKind,\n  info,\n  IsLittleEndianCached,\n  isNum,\n  OPS,\n  shadow,\n  TextRenderingMode,\n  unreachable,\n  Util,\n  warn,\n} from \"../shared/util.js\";\nimport { getShadingPatternFromIR, TilingPattern } from \"./pattern_helper.js\";\n\n// <canvas> contexts store most of the state we need natively.\n// However, PDF needs a bit more state, which we store here.\n\n// Minimal font size that would be used during canvas fillText operations.\nvar MIN_FONT_SIZE = 16;\n// Maximum font size that would be used during canvas fillText operations.\nvar MAX_FONT_SIZE = 100;\nvar MAX_GROUP_SIZE = 4096;\n\n// Heuristic value used when enforcing minimum line widths.\nvar MIN_WIDTH_FACTOR = 0.65;\n\nvar COMPILE_TYPE3_GLYPHS = true;\nvar MAX_SIZE_TO_COMPILE = 1000;\n\nvar FULL_CHUNK_HEIGHT = 16;\n\nfunction addContextCurrentTransform(ctx) {\n  // If the context doesn't expose a `mozCurrentTransform`, add a JS based one.\n  if (!ctx.mozCurrentTransform) {\n    ctx._originalSave = ctx.save;\n    ctx._originalRestore = ctx.restore;\n    ctx._originalRotate = ctx.rotate;\n    ctx._originalScale = ctx.scale;\n    ctx._originalTranslate = ctx.translate;\n    ctx._originalTransform = ctx.transform;\n    ctx._originalSetTransform = ctx.setTransform;\n\n    ctx._transformMatrix = ctx._transformMatrix || [1, 0, 0, 1, 0, 0];\n    ctx._transformStack = [];\n\n    Object.defineProperty(ctx, \"mozCurrentTransform\", {\n      get: function getCurrentTransform() {\n        return this._transformMatrix;\n      },\n    });\n\n    Object.defineProperty(ctx, \"mozCurrentTransformInverse\", {\n      get: function getCurrentTransformInverse() {\n        // Calculation done using WolframAlpha:\n        // http://www.wolframalpha.com/input/?\n        //   i=Inverse+{{a%2C+c%2C+e}%2C+{b%2C+d%2C+f}%2C+{0%2C+0%2C+1}}\n\n        var m = this._transformMatrix;\n        var a = m[0],\n          b = m[1],\n          c = m[2],\n          d = m[3],\n          e = m[4],\n          f = m[5];\n\n        var ad_bc = a * d - b * c;\n        var bc_ad = b * c - a * d;\n\n        return [\n          d / ad_bc,\n          b / bc_ad,\n          c / bc_ad,\n          a / ad_bc,\n          (d * e - c * f) / bc_ad,\n          (b * e - a * f) / ad_bc,\n        ];\n      },\n    });\n\n    ctx.save = function ctxSave() {\n      var old = this._transformMatrix;\n      this._transformStack.push(old);\n      this._transformMatrix = old.slice(0, 6);\n\n      this._originalSave();\n    };\n\n    ctx.restore = function ctxRestore() {\n      var prev = this._transformStack.pop();\n      if (prev) {\n        this._transformMatrix = prev;\n        this._originalRestore();\n      }\n    };\n\n    ctx.translate = function ctxTranslate(x, y) {\n      var m = this._transformMatrix;\n      m[4] = m[0] * x + m[2] * y + m[4];\n      m[5] = m[1] * x + m[3] * y + m[5];\n\n      this._originalTranslate(x, y);\n    };\n\n    ctx.scale = function ctxScale(x, y) {\n      var m = this._transformMatrix;\n      m[0] = m[0] * x;\n      m[1] = m[1] * x;\n      m[2] = m[2] * y;\n      m[3] = m[3] * y;\n\n      this._originalScale(x, y);\n    };\n\n    ctx.transform = function ctxTransform(a, b, c, d, e, f) {\n      var m = this._transformMatrix;\n      this._transformMatrix = [\n        m[0] * a + m[2] * b,\n        m[1] * a + m[3] * b,\n        m[0] * c + m[2] * d,\n        m[1] * c + m[3] * d,\n        m[0] * e + m[2] * f + m[4],\n        m[1] * e + m[3] * f + m[5],\n      ];\n\n      ctx._originalTransform(a, b, c, d, e, f);\n    };\n\n    ctx.setTransform = function ctxSetTransform(a, b, c, d, e, f) {\n      this._transformMatrix = [a, b, c, d, e, f];\n\n      ctx._originalSetTransform(a, b, c, d, e, f);\n    };\n\n    ctx.rotate = function ctxRotate(angle) {\n      var cosValue = Math.cos(angle);\n      var sinValue = Math.sin(angle);\n\n      var m = this._transformMatrix;\n      this._transformMatrix = [\n        m[0] * cosValue + m[2] * sinValue,\n        m[1] * cosValue + m[3] * sinValue,\n        m[0] * -sinValue + m[2] * cosValue,\n        m[1] * -sinValue + m[3] * cosValue,\n        m[4],\n        m[5],\n      ];\n\n      this._originalRotate(angle);\n    };\n  }\n}\n\nvar CachedCanvases = (function CachedCanvasesClosure() {\n  // eslint-disable-next-line no-shadow\n  function CachedCanvases(canvasFactory) {\n    this.canvasFactory = canvasFactory;\n    this.cache = Object.create(null);\n  }\n  CachedCanvases.prototype = {\n    getCanvas: function CachedCanvases_getCanvas(\n      id,\n      width,\n      height,\n      trackTransform\n    ) {\n      var canvasEntry;\n      if (this.cache[id] !== undefined) {\n        canvasEntry = this.cache[id];\n        this.canvasFactory.reset(canvasEntry, width, height);\n        // reset canvas transform for emulated mozCurrentTransform, if needed\n        canvasEntry.context.setTransform(1, 0, 0, 1, 0, 0);\n      } else {\n        canvasEntry = this.canvasFactory.create(width, height);\n        this.cache[id] = canvasEntry;\n      }\n      if (trackTransform) {\n        addContextCurrentTransform(canvasEntry.context);\n      }\n      return canvasEntry;\n    },\n    clear() {\n      for (var id in this.cache) {\n        var canvasEntry = this.cache[id];\n        this.canvasFactory.destroy(canvasEntry);\n        delete this.cache[id];\n      }\n    },\n  };\n  return CachedCanvases;\n})();\n\nfunction compileType3Glyph(imgData) {\n  var POINT_TO_PROCESS_LIMIT = 1000;\n\n  var width = imgData.width,\n    height = imgData.height;\n  var i,\n    j,\n    j0,\n    width1 = width + 1;\n  var points = new Uint8Array(width1 * (height + 1));\n  // prettier-ignore\n  var POINT_TYPES =\n      new Uint8Array([0, 2, 4, 0, 1, 0, 5, 4, 8, 10, 0, 8, 0, 2, 1, 0]);\n\n  // decodes bit-packed mask data\n  var lineSize = (width + 7) & ~7,\n    data0 = imgData.data;\n  var data = new Uint8Array(lineSize * height),\n    pos = 0,\n    ii;\n  for (i = 0, ii = data0.length; i < ii; i++) {\n    var mask = 128,\n      elem = data0[i];\n    while (mask > 0) {\n      data[pos++] = elem & mask ? 0 : 255;\n      mask >>= 1;\n    }\n  }\n\n  // finding interesting points: every point is located between mask pixels,\n  // so there will be points of the (width + 1)x(height + 1) grid. Every point\n  // will have flags assigned based on neighboring mask pixels:\n  //   4 | 8\n  //   --P--\n  //   2 | 1\n  // We are interested only in points with the flags:\n  //   - outside corners: 1, 2, 4, 8;\n  //   - inside corners: 7, 11, 13, 14;\n  //   - and, intersections: 5, 10.\n  var count = 0;\n  pos = 0;\n  if (data[pos] !== 0) {\n    points[0] = 1;\n    ++count;\n  }\n  for (j = 1; j < width; j++) {\n    if (data[pos] !== data[pos + 1]) {\n      points[j] = data[pos] ? 2 : 1;\n      ++count;\n    }\n    pos++;\n  }\n  if (data[pos] !== 0) {\n    points[j] = 2;\n    ++count;\n  }\n  for (i = 1; i < height; i++) {\n    pos = i * lineSize;\n    j0 = i * width1;\n    if (data[pos - lineSize] !== data[pos]) {\n      points[j0] = data[pos] ? 1 : 8;\n      ++count;\n    }\n    // 'sum' is the position of the current pixel configuration in the 'TYPES'\n    // array (in order 8-1-2-4, so we can use '>>2' to shift the column).\n    var sum = (data[pos] ? 4 : 0) + (data[pos - lineSize] ? 8 : 0);\n    for (j = 1; j < width; j++) {\n      sum =\n        (sum >> 2) +\n        (data[pos + 1] ? 4 : 0) +\n        (data[pos - lineSize + 1] ? 8 : 0);\n      if (POINT_TYPES[sum]) {\n        points[j0 + j] = POINT_TYPES[sum];\n        ++count;\n      }\n      pos++;\n    }\n    if (data[pos - lineSize] !== data[pos]) {\n      points[j0 + j] = data[pos] ? 2 : 4;\n      ++count;\n    }\n\n    if (count > POINT_TO_PROCESS_LIMIT) {\n      return null;\n    }\n  }\n\n  pos = lineSize * (height - 1);\n  j0 = i * width1;\n  if (data[pos] !== 0) {\n    points[j0] = 8;\n    ++count;\n  }\n  for (j = 1; j < width; j++) {\n    if (data[pos] !== data[pos + 1]) {\n      points[j0 + j] = data[pos] ? 4 : 8;\n      ++count;\n    }\n    pos++;\n  }\n  if (data[pos] !== 0) {\n    points[j0 + j] = 4;\n    ++count;\n  }\n  if (count > POINT_TO_PROCESS_LIMIT) {\n    return null;\n  }\n\n  // building outlines\n  var steps = new Int32Array([0, width1, -1, 0, -width1, 0, 0, 0, 1]);\n  var outlines = [];\n  for (i = 0; count && i <= height; i++) {\n    var p = i * width1;\n    var end = p + width;\n    while (p < end && !points[p]) {\n      p++;\n    }\n    if (p === end) {\n      continue;\n    }\n    var coords = [p % width1, i];\n\n    var type = points[p],\n      p0 = p,\n      pp;\n    do {\n      var step = steps[type];\n      do {\n        p += step;\n      } while (!points[p]);\n\n      pp = points[p];\n      if (pp !== 5 && pp !== 10) {\n        // set new direction\n        type = pp;\n        // delete mark\n        points[p] = 0;\n      } else {\n        // type is 5 or 10, ie, a crossing\n        // set new direction\n        type = pp & ((0x33 * type) >> 4);\n        // set new type for \"future hit\"\n        points[p] &= (type >> 2) | (type << 2);\n      }\n\n      coords.push(p % width1);\n      coords.push((p / width1) | 0);\n\n      if (!points[p]) {\n        --count;\n      }\n    } while (p0 !== p);\n    outlines.push(coords);\n    --i;\n  }\n\n  var drawOutline = function (c) {\n    c.save();\n    // the path shall be painted in [0..1]x[0..1] space\n    c.scale(1 / width, -1 / height);\n    c.translate(0, -height);\n    c.beginPath();\n    for (let k = 0, kk = outlines.length; k < kk; k++) {\n      var o = outlines[k];\n      c.moveTo(o[0], o[1]);\n      for (let l = 2, ll = o.length; l < ll; l += 2) {\n        c.lineTo(o[l], o[l + 1]);\n      }\n    }\n    c.fill();\n    c.beginPath();\n    c.restore();\n  };\n\n  return drawOutline;\n}\n\nvar CanvasExtraState = (function CanvasExtraStateClosure() {\n  // eslint-disable-next-line no-shadow\n  function CanvasExtraState() {\n    // Are soft masks and alpha values shapes or opacities?\n    this.alphaIsShape = false;\n    this.fontSize = 0;\n    this.fontSizeScale = 1;\n    this.textMatrix = IDENTITY_MATRIX;\n    this.textMatrixScale = 1;\n    this.fontMatrix = FONT_IDENTITY_MATRIX;\n    this.leading = 0;\n    // Current point (in user coordinates)\n    this.x = 0;\n    this.y = 0;\n    // Start of text line (in text coordinates)\n    this.lineX = 0;\n    this.lineY = 0;\n    // Character and word spacing\n    this.charSpacing = 0;\n    this.wordSpacing = 0;\n    this.textHScale = 1;\n    this.textRenderingMode = TextRenderingMode.FILL;\n    this.textRise = 0;\n    // Default fore and background colors\n    this.fillColor = \"#000000\";\n    this.strokeColor = \"#000000\";\n    this.patternFill = false;\n    // Note: fill alpha applies to all non-stroking operations\n    this.fillAlpha = 1;\n    this.strokeAlpha = 1;\n    this.lineWidth = 1;\n    this.activeSMask = null;\n    this.resumeSMaskCtx = null; // nonclonable field (see the save method below)\n  }\n\n  CanvasExtraState.prototype = {\n    clone: function CanvasExtraState_clone() {\n      return Object.create(this);\n    },\n    setCurrentPoint: function CanvasExtraState_setCurrentPoint(x, y) {\n      this.x = x;\n      this.y = y;\n    },\n  };\n  return CanvasExtraState;\n})();\n\nvar CanvasGraphics = (function CanvasGraphicsClosure() {\n  // Defines the time the executeOperatorList is going to be executing\n  // before it stops and shedules a continue of execution.\n  var EXECUTION_TIME = 15;\n  // Defines the number of steps before checking the execution time\n  var EXECUTION_STEPS = 10;\n\n  // eslint-disable-next-line no-shadow\n  function CanvasGraphics(\n    canvasCtx,\n    commonObjs,\n    objs,\n    canvasFactory,\n    webGLContext,\n    imageLayer\n  ) {\n    this.ctx = canvasCtx;\n    this.current = new CanvasExtraState();\n    this.stateStack = [];\n    this.pendingClip = null;\n    this.pendingEOFill = false;\n    this.res = null;\n    this.xobjs = null;\n    this.commonObjs = commonObjs;\n    this.objs = objs;\n    this.canvasFactory = canvasFactory;\n    this.webGLContext = webGLContext;\n    this.imageLayer = imageLayer;\n    this.groupStack = [];\n    this.processingType3 = null;\n    // Patterns are painted relative to the initial page/form transform, see pdf\n    // spec 8.7.2 NOTE 1.\n    this.baseTransform = null;\n    this.baseTransformStack = [];\n    this.groupLevel = 0;\n    this.smaskStack = [];\n    this.smaskCounter = 0;\n    this.tempSMask = null;\n    this.cachedCanvases = new CachedCanvases(this.canvasFactory);\n    if (canvasCtx) {\n      // NOTE: if mozCurrentTransform is polyfilled, then the current state of\n      // the transformation must already be set in canvasCtx._transformMatrix.\n      addContextCurrentTransform(canvasCtx);\n    }\n    this._cachedGetSinglePixelWidth = null;\n  }\n\n  function putBinaryImageData(ctx, imgData) {\n    if (typeof ImageData !== \"undefined\" && imgData instanceof ImageData) {\n      ctx.putImageData(imgData, 0, 0);\n      return;\n    }\n\n    // Put the image data to the canvas in chunks, rather than putting the\n    // whole image at once.  This saves JS memory, because the ImageData object\n    // is smaller. It also possibly saves C++ memory within the implementation\n    // of putImageData(). (E.g. in Firefox we make two short-lived copies of\n    // the data passed to putImageData()). |n| shouldn't be too small, however,\n    // because too many putImageData() calls will slow things down.\n    //\n    // Note: as written, if the last chunk is partial, the putImageData() call\n    // will (conceptually) put pixels past the bounds of the canvas.  But\n    // that's ok; any such pixels are ignored.\n\n    var height = imgData.height,\n      width = imgData.width;\n    var partialChunkHeight = height % FULL_CHUNK_HEIGHT;\n    var fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT;\n    var totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1;\n\n    var chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT);\n    var srcPos = 0,\n      destPos;\n    var src = imgData.data;\n    var dest = chunkImgData.data;\n    var i, j, thisChunkHeight, elemsInThisChunk;\n\n    // There are multiple forms in which the pixel data can be passed, and\n    // imgData.kind tells us which one this is.\n    if (imgData.kind === ImageKind.GRAYSCALE_1BPP) {\n      // Grayscale, 1 bit per pixel (i.e. black-and-white).\n      var srcLength = src.byteLength;\n      var dest32 = new Uint32Array(dest.buffer, 0, dest.byteLength >> 2);\n      var dest32DataLength = dest32.length;\n      var fullSrcDiff = (width + 7) >> 3;\n      var white = 0xffffffff;\n      var black = IsLittleEndianCached.value ? 0xff000000 : 0x000000ff;\n      for (i = 0; i < totalChunks; i++) {\n        thisChunkHeight =\n          i < fullChunks ? FULL_CHUNK_HEIGHT : partialChunkHeight;\n        destPos = 0;\n        for (j = 0; j < thisChunkHeight; j++) {\n          var srcDiff = srcLength - srcPos;\n          var k = 0;\n          var kEnd = srcDiff > fullSrcDiff ? width : srcDiff * 8 - 7;\n          var kEndUnrolled = kEnd & ~7;\n          var mask = 0;\n          var srcByte = 0;\n          for (; k < kEndUnrolled; k += 8) {\n            srcByte = src[srcPos++];\n            dest32[destPos++] = srcByte & 128 ? white : black;\n            dest32[destPos++] = srcByte & 64 ? white : black;\n            dest32[destPos++] = srcByte & 32 ? white : black;\n            dest32[destPos++] = srcByte & 16 ? white : black;\n            dest32[destPos++] = srcByte & 8 ? white : black;\n            dest32[destPos++] = srcByte & 4 ? white : black;\n            dest32[destPos++] = srcByte & 2 ? white : black;\n            dest32[destPos++] = srcByte & 1 ? white : black;\n          }\n          for (; k < kEnd; k++) {\n            if (mask === 0) {\n              srcByte = src[srcPos++];\n              mask = 128;\n            }\n\n            dest32[destPos++] = srcByte & mask ? white : black;\n            mask >>= 1;\n          }\n        }\n        // We ran out of input. Make all remaining pixels transparent.\n        while (destPos < dest32DataLength) {\n          dest32[destPos++] = 0;\n        }\n\n        ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT);\n      }\n    } else if (imgData.kind === ImageKind.RGBA_32BPP) {\n      // RGBA, 32-bits per pixel.\n\n      j = 0;\n      elemsInThisChunk = width * FULL_CHUNK_HEIGHT * 4;\n      for (i = 0; i < fullChunks; i++) {\n        dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk));\n        srcPos += elemsInThisChunk;\n\n        ctx.putImageData(chunkImgData, 0, j);\n        j += FULL_CHUNK_HEIGHT;\n      }\n      if (i < totalChunks) {\n        elemsInThisChunk = width * partialChunkHeight * 4;\n        dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk));\n        ctx.putImageData(chunkImgData, 0, j);\n      }\n    } else if (imgData.kind === ImageKind.RGB_24BPP) {\n      // RGB, 24-bits per pixel.\n      thisChunkHeight = FULL_CHUNK_HEIGHT;\n      elemsInThisChunk = width * thisChunkHeight;\n      for (i = 0; i < totalChunks; i++) {\n        if (i >= fullChunks) {\n          thisChunkHeight = partialChunkHeight;\n          elemsInThisChunk = width * thisChunkHeight;\n        }\n\n        destPos = 0;\n        for (j = elemsInThisChunk; j--; ) {\n          dest[destPos++] = src[srcPos++];\n          dest[destPos++] = src[srcPos++];\n          dest[destPos++] = src[srcPos++];\n          dest[destPos++] = 255;\n        }\n        ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT);\n      }\n    } else {\n      throw new Error(`bad image kind: ${imgData.kind}`);\n    }\n  }\n\n  function putBinaryImageMask(ctx, imgData) {\n    var height = imgData.height,\n      width = imgData.width;\n    var partialChunkHeight = height % FULL_CHUNK_HEIGHT;\n    var fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT;\n    var totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1;\n\n    var chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT);\n    var srcPos = 0;\n    var src = imgData.data;\n    var dest = chunkImgData.data;\n\n    for (var i = 0; i < totalChunks; i++) {\n      var thisChunkHeight =\n        i < fullChunks ? FULL_CHUNK_HEIGHT : partialChunkHeight;\n\n      // Expand the mask so it can be used by the canvas.  Any required\n      // inversion has already been handled.\n      var destPos = 3; // alpha component offset\n      for (var j = 0; j < thisChunkHeight; j++) {\n        var mask = 0;\n        for (var k = 0; k < width; k++) {\n          if (!mask) {\n            var elem = src[srcPos++];\n            mask = 128;\n          }\n          dest[destPos] = elem & mask ? 0 : 255;\n          destPos += 4;\n          mask >>= 1;\n        }\n      }\n      ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT);\n    }\n  }\n\n  function copyCtxState(sourceCtx, destCtx) {\n    var properties = [\n      \"strokeStyle\",\n      \"fillStyle\",\n      \"fillRule\",\n      \"globalAlpha\",\n      \"lineWidth\",\n      \"lineCap\",\n      \"lineJoin\",\n      \"miterLimit\",\n      \"globalCompositeOperation\",\n      \"font\",\n    ];\n    for (var i = 0, ii = properties.length; i < ii; i++) {\n      var property = properties[i];\n      if (sourceCtx[property] !== undefined) {\n        destCtx[property] = sourceCtx[property];\n      }\n    }\n    if (sourceCtx.setLineDash !== undefined) {\n      destCtx.setLineDash(sourceCtx.getLineDash());\n      destCtx.lineDashOffset = sourceCtx.lineDashOffset;\n    }\n  }\n\n  function resetCtxToDefault(ctx) {\n    ctx.strokeStyle = \"#000000\";\n    ctx.fillStyle = \"#000000\";\n    ctx.fillRule = \"nonzero\";\n    ctx.globalAlpha = 1;\n    ctx.lineWidth = 1;\n    ctx.lineCap = \"butt\";\n    ctx.lineJoin = \"miter\";\n    ctx.miterLimit = 10;\n    ctx.globalCompositeOperation = \"source-over\";\n    ctx.font = \"10px sans-serif\";\n    if (ctx.setLineDash !== undefined) {\n      ctx.setLineDash([]);\n      ctx.lineDashOffset = 0;\n    }\n  }\n\n  function composeSMaskBackdrop(bytes, r0, g0, b0) {\n    var length = bytes.length;\n    for (var i = 3; i < length; i += 4) {\n      var alpha = bytes[i];\n      if (alpha === 0) {\n        bytes[i - 3] = r0;\n        bytes[i - 2] = g0;\n        bytes[i - 1] = b0;\n      } else if (alpha < 255) {\n        var alpha_ = 255 - alpha;\n        bytes[i - 3] = (bytes[i - 3] * alpha + r0 * alpha_) >> 8;\n        bytes[i - 2] = (bytes[i - 2] * alpha + g0 * alpha_) >> 8;\n        bytes[i - 1] = (bytes[i - 1] * alpha + b0 * alpha_) >> 8;\n      }\n    }\n  }\n\n  function composeSMaskAlpha(maskData, layerData, transferMap) {\n    var length = maskData.length;\n    var scale = 1 / 255;\n    for (var i = 3; i < length; i += 4) {\n      var alpha = transferMap ? transferMap[maskData[i]] : maskData[i];\n      layerData[i] = (layerData[i] * alpha * scale) | 0;\n    }\n  }\n\n  function composeSMaskLuminosity(maskData, layerData, transferMap) {\n    var length = maskData.length;\n    for (var i = 3; i < length; i += 4) {\n      var y =\n        maskData[i - 3] * 77 + // * 0.3 / 255 * 0x10000\n        maskData[i - 2] * 152 + // * 0.59 ....\n        maskData[i - 1] * 28; // * 0.11 ....\n      layerData[i] = transferMap\n        ? (layerData[i] * transferMap[y >> 8]) >> 8\n        : (layerData[i] * y) >> 16;\n    }\n  }\n\n  function genericComposeSMask(\n    maskCtx,\n    layerCtx,\n    width,\n    height,\n    subtype,\n    backdrop,\n    transferMap\n  ) {\n    var hasBackdrop = !!backdrop;\n    var r0 = hasBackdrop ? backdrop[0] : 0;\n    var g0 = hasBackdrop ? backdrop[1] : 0;\n    var b0 = hasBackdrop ? backdrop[2] : 0;\n\n    var composeFn;\n    if (subtype === \"Luminosity\") {\n      composeFn = composeSMaskLuminosity;\n    } else {\n      composeFn = composeSMaskAlpha;\n    }\n\n    // processing image in chunks to save memory\n    var PIXELS_TO_PROCESS = 1048576;\n    var chunkSize = Math.min(height, Math.ceil(PIXELS_TO_PROCESS / width));\n    for (var row = 0; row < height; row += chunkSize) {\n      var chunkHeight = Math.min(chunkSize, height - row);\n      var maskData = maskCtx.getImageData(0, row, width, chunkHeight);\n      var layerData = layerCtx.getImageData(0, row, width, chunkHeight);\n\n      if (hasBackdrop) {\n        composeSMaskBackdrop(maskData.data, r0, g0, b0);\n      }\n      composeFn(maskData.data, layerData.data, transferMap);\n\n      maskCtx.putImageData(layerData, 0, row);\n    }\n  }\n\n  function composeSMask(ctx, smask, layerCtx, webGLContext) {\n    var mask = smask.canvas;\n    var maskCtx = smask.context;\n\n    ctx.setTransform(\n      smask.scaleX,\n      0,\n      0,\n      smask.scaleY,\n      smask.offsetX,\n      smask.offsetY\n    );\n\n    var backdrop = smask.backdrop || null;\n    if (!smask.transferMap && webGLContext.isEnabled) {\n      const composed = webGLContext.composeSMask({\n        layer: layerCtx.canvas,\n        mask,\n        properties: {\n          subtype: smask.subtype,\n          backdrop,\n        },\n      });\n      ctx.setTransform(1, 0, 0, 1, 0, 0);\n      ctx.drawImage(composed, smask.offsetX, smask.offsetY);\n      return;\n    }\n    genericComposeSMask(\n      maskCtx,\n      layerCtx,\n      mask.width,\n      mask.height,\n      smask.subtype,\n      backdrop,\n      smask.transferMap\n    );\n    ctx.drawImage(mask, 0, 0);\n  }\n\n  var LINE_CAP_STYLES = [\"butt\", \"round\", \"square\"];\n  var LINE_JOIN_STYLES = [\"miter\", \"round\", \"bevel\"];\n  var NORMAL_CLIP = {};\n  var EO_CLIP = {};\n\n  CanvasGraphics.prototype = {\n    beginDrawing({\n      transform,\n      viewport,\n      transparency = false,\n      background = null,\n    }) {\n      // For pdfs that use blend modes we have to clear the canvas else certain\n      // blend modes can look wrong since we'd be blending with a white\n      // backdrop. The problem with a transparent backdrop though is we then\n      // don't get sub pixel anti aliasing on text, creating temporary\n      // transparent canvas when we have blend modes.\n      var width = this.ctx.canvas.width;\n      var height = this.ctx.canvas.height;\n\n      this.ctx.save();\n      this.ctx.fillStyle = background || \"rgb(255, 255, 255)\";\n      this.ctx.fillRect(0, 0, width, height);\n      this.ctx.restore();\n\n      if (transparency) {\n        var transparentCanvas = this.cachedCanvases.getCanvas(\n          \"transparent\",\n          width,\n          height,\n          true\n        );\n        this.compositeCtx = this.ctx;\n        this.transparentCanvas = transparentCanvas.canvas;\n        this.ctx = transparentCanvas.context;\n        this.ctx.save();\n        // The transform can be applied before rendering, transferring it to\n        // the new canvas.\n        this.ctx.transform.apply(\n          this.ctx,\n          this.compositeCtx.mozCurrentTransform\n        );\n      }\n\n      this.ctx.save();\n      resetCtxToDefault(this.ctx);\n      if (transform) {\n        this.ctx.transform.apply(this.ctx, transform);\n      }\n      this.ctx.transform.apply(this.ctx, viewport.transform);\n\n      this.baseTransform = this.ctx.mozCurrentTransform.slice();\n\n      if (this.imageLayer) {\n        this.imageLayer.beginLayout();\n      }\n    },\n\n    executeOperatorList: function CanvasGraphics_executeOperatorList(\n      operatorList,\n      executionStartIdx,\n      continueCallback,\n      stepper\n    ) {\n      var argsArray = operatorList.argsArray;\n      var fnArray = operatorList.fnArray;\n      var i = executionStartIdx || 0;\n      var argsArrayLen = argsArray.length;\n\n      // Sometimes the OperatorList to execute is empty.\n      if (argsArrayLen === i) {\n        return i;\n      }\n\n      var chunkOperations =\n        argsArrayLen - i > EXECUTION_STEPS &&\n        typeof continueCallback === \"function\";\n      var endTime = chunkOperations ? Date.now() + EXECUTION_TIME : 0;\n      var steps = 0;\n\n      var commonObjs = this.commonObjs;\n      var objs = this.objs;\n      var fnId;\n\n      while (true) {\n        if (stepper !== undefined && i === stepper.nextBreakPoint) {\n          stepper.breakIt(i, continueCallback);\n          return i;\n        }\n\n        fnId = fnArray[i];\n\n        if (fnId !== OPS.dependency) {\n          this[fnId].apply(this, argsArray[i]);\n        } else {\n          for (const depObjId of argsArray[i]) {\n            const objsPool = depObjId.startsWith(\"g_\") ? commonObjs : objs;\n\n            // If the promise isn't resolved yet, add the continueCallback\n            // to the promise and bail out.\n            if (!objsPool.has(depObjId)) {\n              objsPool.get(depObjId, continueCallback);\n              return i;\n            }\n          }\n        }\n\n        i++;\n\n        // If the entire operatorList was executed, stop as were done.\n        if (i === argsArrayLen) {\n          return i;\n        }\n\n        // If the execution took longer then a certain amount of time and\n        // `continueCallback` is specified, interrupt the execution.\n        if (chunkOperations && ++steps > EXECUTION_STEPS) {\n          if (Date.now() > endTime) {\n            continueCallback();\n            return i;\n          }\n          steps = 0;\n        }\n\n        // If the operatorList isn't executed completely yet OR the execution\n        // time was short enough, do another execution round.\n      }\n    },\n\n    endDrawing: function CanvasGraphics_endDrawing() {\n      // Finishing all opened operations such as SMask group painting.\n      if (this.current.activeSMask !== null) {\n        this.endSMaskGroup();\n      }\n\n      this.ctx.restore();\n\n      if (this.transparentCanvas) {\n        this.ctx = this.compositeCtx;\n        this.ctx.save();\n        this.ctx.setTransform(1, 0, 0, 1, 0, 0); // Avoid apply transform twice\n        this.ctx.drawImage(this.transparentCanvas, 0, 0);\n        this.ctx.restore();\n        this.transparentCanvas = null;\n      }\n\n      this.cachedCanvases.clear();\n      this.webGLContext.clear();\n\n      if (this.imageLayer) {\n        this.imageLayer.endLayout();\n      }\n    },\n\n    // Graphics state\n    setLineWidth: function CanvasGraphics_setLineWidth(width) {\n      this.current.lineWidth = width;\n      this.ctx.lineWidth = width;\n    },\n    setLineCap: function CanvasGraphics_setLineCap(style) {\n      this.ctx.lineCap = LINE_CAP_STYLES[style];\n    },\n    setLineJoin: function CanvasGraphics_setLineJoin(style) {\n      this.ctx.lineJoin = LINE_JOIN_STYLES[style];\n    },\n    setMiterLimit: function CanvasGraphics_setMiterLimit(limit) {\n      this.ctx.miterLimit = limit;\n    },\n    setDash: function CanvasGraphics_setDash(dashArray, dashPhase) {\n      var ctx = this.ctx;\n      if (ctx.setLineDash !== undefined) {\n        ctx.setLineDash(dashArray);\n        ctx.lineDashOffset = dashPhase;\n      }\n    },\n    setRenderingIntent(intent) {\n      // This operation is ignored since we haven't found a use case for it yet.\n    },\n    setFlatness(flatness) {\n      // This operation is ignored since we haven't found a use case for it yet.\n    },\n    setGState: function CanvasGraphics_setGState(states) {\n      for (var i = 0, ii = states.length; i < ii; i++) {\n        var state = states[i];\n        var key = state[0];\n        var value = state[1];\n\n        switch (key) {\n          case \"LW\":\n            this.setLineWidth(value);\n            break;\n          case \"LC\":\n            this.setLineCap(value);\n            break;\n          case \"LJ\":\n            this.setLineJoin(value);\n            break;\n          case \"ML\":\n            this.setMiterLimit(value);\n            break;\n          case \"D\":\n            this.setDash(value[0], value[1]);\n            break;\n          case \"RI\":\n            this.setRenderingIntent(value);\n            break;\n          case \"FL\":\n            this.setFlatness(value);\n            break;\n          case \"Font\":\n            this.setFont(value[0], value[1]);\n            break;\n          case \"CA\":\n            this.current.strokeAlpha = state[1];\n            break;\n          case \"ca\":\n            this.current.fillAlpha = state[1];\n            this.ctx.globalAlpha = state[1];\n            break;\n          case \"BM\":\n            this.ctx.globalCompositeOperation = value;\n            break;\n          case \"SMask\":\n            if (this.current.activeSMask) {\n              // If SMask is currrenly used, it needs to be suspended or\n              // finished. Suspend only makes sense when at least one save()\n              // was performed and state needs to be reverted on restore().\n              if (\n                this.stateStack.length > 0 &&\n                this.stateStack[this.stateStack.length - 1].activeSMask ===\n                  this.current.activeSMask\n              ) {\n                this.suspendSMaskGroup();\n              } else {\n                this.endSMaskGroup();\n              }\n            }\n            this.current.activeSMask = value ? this.tempSMask : null;\n            if (this.current.activeSMask) {\n              this.beginSMaskGroup();\n            }\n            this.tempSMask = null;\n            break;\n        }\n      }\n    },\n    beginSMaskGroup: function CanvasGraphics_beginSMaskGroup() {\n      var activeSMask = this.current.activeSMask;\n      var drawnWidth = activeSMask.canvas.width;\n      var drawnHeight = activeSMask.canvas.height;\n      var cacheId = \"smaskGroupAt\" + this.groupLevel;\n      var scratchCanvas = this.cachedCanvases.getCanvas(\n        cacheId,\n        drawnWidth,\n        drawnHeight,\n        true\n      );\n\n      var currentCtx = this.ctx;\n      var currentTransform = currentCtx.mozCurrentTransform;\n      this.ctx.save();\n\n      var groupCtx = scratchCanvas.context;\n      groupCtx.scale(1 / activeSMask.scaleX, 1 / activeSMask.scaleY);\n      groupCtx.translate(-activeSMask.offsetX, -activeSMask.offsetY);\n      groupCtx.transform.apply(groupCtx, currentTransform);\n\n      activeSMask.startTransformInverse = groupCtx.mozCurrentTransformInverse;\n\n      copyCtxState(currentCtx, groupCtx);\n      this.ctx = groupCtx;\n      this.setGState([\n        [\"BM\", \"source-over\"],\n        [\"ca\", 1],\n        [\"CA\", 1],\n      ]);\n      this.groupStack.push(currentCtx);\n      this.groupLevel++;\n    },\n    suspendSMaskGroup: function CanvasGraphics_endSMaskGroup() {\n      // Similar to endSMaskGroup, the intermediate canvas has to be composed\n      // and future ctx state restored.\n      var groupCtx = this.ctx;\n      this.groupLevel--;\n      this.ctx = this.groupStack.pop();\n\n      composeSMask(\n        this.ctx,\n        this.current.activeSMask,\n        groupCtx,\n        this.webGLContext\n      );\n      this.ctx.restore();\n      this.ctx.save(); // save is needed since SMask will be resumed.\n      copyCtxState(groupCtx, this.ctx);\n\n      // Saving state for resuming.\n      this.current.resumeSMaskCtx = groupCtx;\n      // Transform was changed in the SMask canvas, reflecting this change on\n      // this.ctx.\n      var deltaTransform = Util.transform(\n        this.current.activeSMask.startTransformInverse,\n        groupCtx.mozCurrentTransform\n      );\n      this.ctx.transform.apply(this.ctx, deltaTransform);\n\n      // SMask was composed, the results at the groupCtx can be cleared.\n      groupCtx.save();\n      groupCtx.setTransform(1, 0, 0, 1, 0, 0);\n      groupCtx.clearRect(0, 0, groupCtx.canvas.width, groupCtx.canvas.height);\n      groupCtx.restore();\n    },\n    resumeSMaskGroup: function CanvasGraphics_endSMaskGroup() {\n      // Resuming state saved by suspendSMaskGroup. We don't need to restore\n      // any groupCtx state since restore() command (the only caller) will do\n      // that for us. See also beginSMaskGroup.\n      var groupCtx = this.current.resumeSMaskCtx;\n      var currentCtx = this.ctx;\n      this.ctx = groupCtx;\n      this.groupStack.push(currentCtx);\n      this.groupLevel++;\n    },\n    endSMaskGroup: function CanvasGraphics_endSMaskGroup() {\n      var groupCtx = this.ctx;\n      this.groupLevel--;\n      this.ctx = this.groupStack.pop();\n\n      composeSMask(\n        this.ctx,\n        this.current.activeSMask,\n        groupCtx,\n        this.webGLContext\n      );\n      this.ctx.restore();\n      copyCtxState(groupCtx, this.ctx);\n      // Transform was changed in the SMask canvas, reflecting this change on\n      // this.ctx.\n      var deltaTransform = Util.transform(\n        this.current.activeSMask.startTransformInverse,\n        groupCtx.mozCurrentTransform\n      );\n      this.ctx.transform.apply(this.ctx, deltaTransform);\n    },\n    save: function CanvasGraphics_save() {\n      this.ctx.save();\n      var old = this.current;\n      this.stateStack.push(old);\n      this.current = old.clone();\n      this.current.resumeSMaskCtx = null;\n    },\n    restore: function CanvasGraphics_restore() {\n      // SMask was suspended, we just need to resume it.\n      if (this.current.resumeSMaskCtx) {\n        this.resumeSMaskGroup();\n      }\n      // SMask has to be finished once there is no states that are using the\n      // same SMask.\n      if (\n        this.current.activeSMask !== null &&\n        (this.stateStack.length === 0 ||\n          this.stateStack[this.stateStack.length - 1].activeSMask !==\n            this.current.activeSMask)\n      ) {\n        this.endSMaskGroup();\n      }\n\n      if (this.stateStack.length !== 0) {\n        this.current = this.stateStack.pop();\n        this.ctx.restore();\n\n        // Ensure that the clipping path is reset (fixes issue6413.pdf).\n        this.pendingClip = null;\n\n        this._cachedGetSinglePixelWidth = null;\n      }\n    },\n    transform: function CanvasGraphics_transform(a, b, c, d, e, f) {\n      this.ctx.transform(a, b, c, d, e, f);\n\n      this._cachedGetSinglePixelWidth = null;\n    },\n\n    // Path\n    constructPath: function CanvasGraphics_constructPath(ops, args) {\n      var ctx = this.ctx;\n      var current = this.current;\n      var x = current.x,\n        y = current.y;\n      for (var i = 0, j = 0, ii = ops.length; i < ii; i++) {\n        switch (ops[i] | 0) {\n          case OPS.rectangle:\n            x = args[j++];\n            y = args[j++];\n            var width = args[j++];\n            var height = args[j++];\n            if (width === 0) {\n              width = this.getSinglePixelWidth();\n            }\n            if (height === 0) {\n              height = this.getSinglePixelWidth();\n            }\n            var xw = x + width;\n            var yh = y + height;\n            this.ctx.moveTo(x, y);\n            this.ctx.lineTo(xw, y);\n            this.ctx.lineTo(xw, yh);\n            this.ctx.lineTo(x, yh);\n            this.ctx.lineTo(x, y);\n            this.ctx.closePath();\n            break;\n          case OPS.moveTo:\n            x = args[j++];\n            y = args[j++];\n            ctx.moveTo(x, y);\n            break;\n          case OPS.lineTo:\n            x = args[j++];\n            y = args[j++];\n            ctx.lineTo(x, y);\n            break;\n          case OPS.curveTo:\n            x = args[j + 4];\n            y = args[j + 5];\n            ctx.bezierCurveTo(\n              args[j],\n              args[j + 1],\n              args[j + 2],\n              args[j + 3],\n              x,\n              y\n            );\n            j += 6;\n            break;\n          case OPS.curveTo2:\n            ctx.bezierCurveTo(\n              x,\n              y,\n              args[j],\n              args[j + 1],\n              args[j + 2],\n              args[j + 3]\n            );\n            x = args[j + 2];\n            y = args[j + 3];\n            j += 4;\n            break;\n          case OPS.curveTo3:\n            x = args[j + 2];\n            y = args[j + 3];\n            ctx.bezierCurveTo(args[j], args[j + 1], x, y, x, y);\n            j += 4;\n            break;\n          case OPS.closePath:\n            ctx.closePath();\n            break;\n        }\n      }\n      current.setCurrentPoint(x, y);\n    },\n    closePath: function CanvasGraphics_closePath() {\n      this.ctx.closePath();\n    },\n    stroke: function CanvasGraphics_stroke(consumePath) {\n      consumePath = typeof consumePath !== \"undefined\" ? consumePath : true;\n      var ctx = this.ctx;\n      var strokeColor = this.current.strokeColor;\n      // For stroke we want to temporarily change the global alpha to the\n      // stroking alpha.\n      ctx.globalAlpha = this.current.strokeAlpha;\n      if (\n        strokeColor &&\n        strokeColor.hasOwnProperty(\"type\") &&\n        strokeColor.type === \"Pattern\"\n      ) {\n        // for patterns, we transform to pattern space, calculate\n        // the pattern, call stroke, and restore to user space\n        ctx.save();\n        // The current transform will be replaced while building the pattern,\n        // but the line width needs to be adjusted by the current transform, so\n        // we must scale it. To properly fix this we should be using a pattern\n        // transform instead (see #10955).\n        const transform = ctx.mozCurrentTransform;\n        const scale = Util.singularValueDecompose2dScale(transform)[0];\n        ctx.strokeStyle = strokeColor.getPattern(ctx, this);\n        ctx.lineWidth = Math.max(\n          this.getSinglePixelWidth() * MIN_WIDTH_FACTOR,\n          this.current.lineWidth * scale\n        );\n        ctx.stroke();\n        ctx.restore();\n      } else {\n        // Prevent drawing too thin lines by enforcing a minimum line width.\n        ctx.lineWidth = Math.max(\n          this.getSinglePixelWidth() * MIN_WIDTH_FACTOR,\n          this.current.lineWidth\n        );\n        ctx.stroke();\n      }\n      if (consumePath) {\n        this.consumePath();\n      }\n      // Restore the global alpha to the fill alpha\n      ctx.globalAlpha = this.current.fillAlpha;\n    },\n    closeStroke: function CanvasGraphics_closeStroke() {\n      this.closePath();\n      this.stroke();\n    },\n    fill: function CanvasGraphics_fill(consumePath) {\n      consumePath = typeof consumePath !== \"undefined\" ? consumePath : true;\n      var ctx = this.ctx;\n      var fillColor = this.current.fillColor;\n      var isPatternFill = this.current.patternFill;\n      var needRestore = false;\n\n      if (isPatternFill) {\n        ctx.save();\n        if (this.baseTransform) {\n          ctx.setTransform.apply(ctx, this.baseTransform);\n        }\n        ctx.fillStyle = fillColor.getPattern(ctx, this);\n        needRestore = true;\n      }\n\n      if (this.pendingEOFill) {\n        ctx.fill(\"evenodd\");\n        this.pendingEOFill = false;\n      } else {\n        ctx.fill();\n      }\n\n      if (needRestore) {\n        ctx.restore();\n      }\n      if (consumePath) {\n        this.consumePath();\n      }\n    },\n    eoFill: function CanvasGraphics_eoFill() {\n      this.pendingEOFill = true;\n      this.fill();\n    },\n    fillStroke: function CanvasGraphics_fillStroke() {\n      this.fill(false);\n      this.stroke(false);\n\n      this.consumePath();\n    },\n    eoFillStroke: function CanvasGraphics_eoFillStroke() {\n      this.pendingEOFill = true;\n      this.fillStroke();\n    },\n    closeFillStroke: function CanvasGraphics_closeFillStroke() {\n      this.closePath();\n      this.fillStroke();\n    },\n    closeEOFillStroke: function CanvasGraphics_closeEOFillStroke() {\n      this.pendingEOFill = true;\n      this.closePath();\n      this.fillStroke();\n    },\n    endPath: function CanvasGraphics_endPath() {\n      this.consumePath();\n    },\n\n    // Clipping\n    clip: function CanvasGraphics_clip() {\n      this.pendingClip = NORMAL_CLIP;\n    },\n    eoClip: function CanvasGraphics_eoClip() {\n      this.pendingClip = EO_CLIP;\n    },\n\n    // Text\n    beginText: function CanvasGraphics_beginText() {\n      this.current.textMatrix = IDENTITY_MATRIX;\n      this.current.textMatrixScale = 1;\n      this.current.x = this.current.lineX = 0;\n      this.current.y = this.current.lineY = 0;\n    },\n    endText: function CanvasGraphics_endText() {\n      var paths = this.pendingTextPaths;\n      var ctx = this.ctx;\n      if (paths === undefined) {\n        ctx.beginPath();\n        return;\n      }\n\n      ctx.save();\n      ctx.beginPath();\n      for (var i = 0; i < paths.length; i++) {\n        var path = paths[i];\n        ctx.setTransform.apply(ctx, path.transform);\n        ctx.translate(path.x, path.y);\n        path.addToPath(ctx, path.fontSize);\n      }\n      ctx.restore();\n      ctx.clip();\n      ctx.beginPath();\n      delete this.pendingTextPaths;\n    },\n    setCharSpacing: function CanvasGraphics_setCharSpacing(spacing) {\n      this.current.charSpacing = spacing;\n    },\n    setWordSpacing: function CanvasGraphics_setWordSpacing(spacing) {\n      this.current.wordSpacing = spacing;\n    },\n    setHScale: function CanvasGraphics_setHScale(scale) {\n      this.current.textHScale = scale / 100;\n    },\n    setLeading: function CanvasGraphics_setLeading(leading) {\n      this.current.leading = -leading;\n    },\n    setFont: function CanvasGraphics_setFont(fontRefName, size) {\n      var fontObj = this.commonObjs.get(fontRefName);\n      var current = this.current;\n\n      if (!fontObj) {\n        throw new Error(`Can't find font for ${fontRefName}`);\n      }\n\n      current.fontMatrix = fontObj.fontMatrix\n        ? fontObj.fontMatrix\n        : FONT_IDENTITY_MATRIX;\n\n      // A valid matrix needs all main diagonal elements to be non-zero\n      // This also ensures we bypass FF bugzilla bug #719844.\n      if (current.fontMatrix[0] === 0 || current.fontMatrix[3] === 0) {\n        warn(\"Invalid font matrix for font \" + fontRefName);\n      }\n\n      // The spec for Tf (setFont) says that 'size' specifies the font 'scale',\n      // and in some docs this can be negative (inverted x-y axes).\n      if (size < 0) {\n        size = -size;\n        current.fontDirection = -1;\n      } else {\n        current.fontDirection = 1;\n      }\n\n      this.current.font = fontObj;\n      this.current.fontSize = size;\n\n      if (fontObj.isType3Font) {\n        return; // we don't need ctx.font for Type3 fonts\n      }\n\n      var name = fontObj.loadedName || \"sans-serif\";\n\n      let bold = \"normal\";\n      if (fontObj.black) {\n        bold = \"900\";\n      } else if (fontObj.bold) {\n        bold = \"bold\";\n      }\n      var italic = fontObj.italic ? \"italic\" : \"normal\";\n      var typeface = `\"${name}\", ${fontObj.fallbackName}`;\n\n      // Some font backends cannot handle fonts below certain size.\n      // Keeping the font at minimal size and using the fontSizeScale to change\n      // the current transformation matrix before the fillText/strokeText.\n      // See https://bugzilla.mozilla.org/show_bug.cgi?id=726227\n      let browserFontSize = size;\n      if (size < MIN_FONT_SIZE) {\n        browserFontSize = MIN_FONT_SIZE;\n      } else if (size > MAX_FONT_SIZE) {\n        browserFontSize = MAX_FONT_SIZE;\n      }\n      this.current.fontSizeScale = size / browserFontSize;\n\n      this.ctx.font = `${italic} ${bold} ${browserFontSize}px ${typeface}`;\n    },\n    setTextRenderingMode: function CanvasGraphics_setTextRenderingMode(mode) {\n      this.current.textRenderingMode = mode;\n    },\n    setTextRise: function CanvasGraphics_setTextRise(rise) {\n      this.current.textRise = rise;\n    },\n    moveText: function CanvasGraphics_moveText(x, y) {\n      this.current.x = this.current.lineX += x;\n      this.current.y = this.current.lineY += y;\n    },\n    setLeadingMoveText: function CanvasGraphics_setLeadingMoveText(x, y) {\n      this.setLeading(-y);\n      this.moveText(x, y);\n    },\n    setTextMatrix: function CanvasGraphics_setTextMatrix(a, b, c, d, e, f) {\n      this.current.textMatrix = [a, b, c, d, e, f];\n      this.current.textMatrixScale = Math.sqrt(a * a + b * b);\n\n      this.current.x = this.current.lineX = 0;\n      this.current.y = this.current.lineY = 0;\n    },\n    nextLine: function CanvasGraphics_nextLine() {\n      this.moveText(0, this.current.leading);\n    },\n\n    paintChar(character, x, y, patternTransform) {\n      var ctx = this.ctx;\n      var current = this.current;\n      var font = current.font;\n      var textRenderingMode = current.textRenderingMode;\n      var fontSize = current.fontSize / current.fontSizeScale;\n      var fillStrokeMode =\n        textRenderingMode & TextRenderingMode.FILL_STROKE_MASK;\n      var isAddToPathSet = !!(\n        textRenderingMode & TextRenderingMode.ADD_TO_PATH_FLAG\n      );\n      const patternFill = current.patternFill && !font.missingFile;\n\n      var addToPath;\n      if (font.disableFontFace || isAddToPathSet || patternFill) {\n        addToPath = font.getPathGenerator(this.commonObjs, character);\n      }\n\n      if (font.disableFontFace || patternFill) {\n        ctx.save();\n        ctx.translate(x, y);\n        ctx.beginPath();\n        addToPath(ctx, fontSize);\n        if (patternTransform) {\n          ctx.setTransform.apply(ctx, patternTransform);\n        }\n        if (\n          fillStrokeMode === TextRenderingMode.FILL ||\n          fillStrokeMode === TextRenderingMode.FILL_STROKE\n        ) {\n          ctx.fill();\n        }\n        if (\n          fillStrokeMode === TextRenderingMode.STROKE ||\n          fillStrokeMode === TextRenderingMode.FILL_STROKE\n        ) {\n          ctx.stroke();\n        }\n        ctx.restore();\n      } else {\n        if (\n          fillStrokeMode === TextRenderingMode.FILL ||\n          fillStrokeMode === TextRenderingMode.FILL_STROKE\n        ) {\n          ctx.fillText(character, x, y);\n        }\n        if (\n          fillStrokeMode === TextRenderingMode.STROKE ||\n          fillStrokeMode === TextRenderingMode.FILL_STROKE\n        ) {\n          ctx.strokeText(character, x, y);\n        }\n      }\n\n      if (isAddToPathSet) {\n        var paths = this.pendingTextPaths || (this.pendingTextPaths = []);\n        paths.push({\n          transform: ctx.mozCurrentTransform,\n          x,\n          y,\n          fontSize,\n          addToPath,\n        });\n      }\n    },\n\n    get isFontSubpixelAAEnabled() {\n      // Checks if anti-aliasing is enabled when scaled text is painted.\n      // On Windows GDI scaled fonts looks bad.\n      const { context: ctx } = this.cachedCanvases.getCanvas(\n        \"isFontSubpixelAAEnabled\",\n        10,\n        10\n      );\n      ctx.scale(1.5, 1);\n      ctx.fillText(\"I\", 0, 10);\n      var data = ctx.getImageData(0, 0, 10, 10).data;\n      var enabled = false;\n      for (var i = 3; i < data.length; i += 4) {\n        if (data[i] > 0 && data[i] < 255) {\n          enabled = true;\n          break;\n        }\n      }\n      return shadow(this, \"isFontSubpixelAAEnabled\", enabled);\n    },\n\n    showText: function CanvasGraphics_showText(glyphs) {\n      var current = this.current;\n      var font = current.font;\n      if (font.isType3Font) {\n        return this.showType3Text(glyphs);\n      }\n\n      var fontSize = current.fontSize;\n      if (fontSize === 0) {\n        return undefined;\n      }\n\n      var ctx = this.ctx;\n      var fontSizeScale = current.fontSizeScale;\n      var charSpacing = current.charSpacing;\n      var wordSpacing = current.wordSpacing;\n      var fontDirection = current.fontDirection;\n      var textHScale = current.textHScale * fontDirection;\n      var glyphsLength = glyphs.length;\n      var vertical = font.vertical;\n      var spacingDir = vertical ? 1 : -1;\n      var defaultVMetrics = font.defaultVMetrics;\n      var widthAdvanceScale = fontSize * current.fontMatrix[0];\n\n      var simpleFillText =\n        current.textRenderingMode === TextRenderingMode.FILL &&\n        !font.disableFontFace &&\n        !current.patternFill;\n\n      ctx.save();\n      let patternTransform;\n      if (current.patternFill) {\n        // TODO: Patterns are not applied correctly to text if a non-embedded\n        // font is used. E.g. issue 8111 and ShowText-ShadingPattern.pdf.\n        ctx.save();\n        const pattern = current.fillColor.getPattern(ctx, this);\n        patternTransform = ctx.mozCurrentTransform;\n        ctx.restore();\n        ctx.fillStyle = pattern;\n      }\n      ctx.transform.apply(ctx, current.textMatrix);\n      ctx.translate(current.x, current.y + current.textRise);\n\n      if (fontDirection > 0) {\n        ctx.scale(textHScale, -1);\n      } else {\n        ctx.scale(textHScale, 1);\n      }\n\n      var lineWidth = current.lineWidth;\n      var scale = current.textMatrixScale;\n      if (scale === 0 || lineWidth === 0) {\n        var fillStrokeMode =\n          current.textRenderingMode & TextRenderingMode.FILL_STROKE_MASK;\n        if (\n          fillStrokeMode === TextRenderingMode.STROKE ||\n          fillStrokeMode === TextRenderingMode.FILL_STROKE\n        ) {\n          this._cachedGetSinglePixelWidth = null;\n          lineWidth = this.getSinglePixelWidth() * MIN_WIDTH_FACTOR;\n        }\n      } else {\n        lineWidth /= scale;\n      }\n\n      if (fontSizeScale !== 1.0) {\n        ctx.scale(fontSizeScale, fontSizeScale);\n        lineWidth /= fontSizeScale;\n      }\n\n      ctx.lineWidth = lineWidth;\n\n      var x = 0,\n        i;\n      for (i = 0; i < glyphsLength; ++i) {\n        var glyph = glyphs[i];\n        if (isNum(glyph)) {\n          x += (spacingDir * glyph * fontSize) / 1000;\n          continue;\n        }\n\n        var restoreNeeded = false;\n        var spacing = (glyph.isSpace ? wordSpacing : 0) + charSpacing;\n        var character = glyph.fontChar;\n        var accent = glyph.accent;\n        var scaledX, scaledY, scaledAccentX, scaledAccentY;\n        var width = glyph.width;\n        if (vertical) {\n          var vmetric, vx, vy;\n          vmetric = glyph.vmetric || defaultVMetrics;\n          vx = glyph.vmetric ? vmetric[1] : width * 0.5;\n          vx = -vx * widthAdvanceScale;\n          vy = vmetric[2] * widthAdvanceScale;\n\n          width = vmetric ? -vmetric[0] : width;\n          scaledX = vx / fontSizeScale;\n          scaledY = (x + vy) / fontSizeScale;\n        } else {\n          scaledX = x / fontSizeScale;\n          scaledY = 0;\n        }\n\n        if (font.remeasure && width > 0) {\n          // Some standard fonts may not have the exact width: rescale per\n          // character if measured width is greater than expected glyph width\n          // and subpixel-aa is enabled, otherwise just center the glyph.\n          var measuredWidth =\n            ((ctx.measureText(character).width * 1000) / fontSize) *\n            fontSizeScale;\n          if (width < measuredWidth && this.isFontSubpixelAAEnabled) {\n            var characterScaleX = width / measuredWidth;\n            restoreNeeded = true;\n            ctx.save();\n            ctx.scale(characterScaleX, 1);\n            scaledX /= characterScaleX;\n          } else if (width !== measuredWidth) {\n            scaledX +=\n              (((width - measuredWidth) / 2000) * fontSize) / fontSizeScale;\n          }\n        }\n\n        // Only attempt to draw the glyph if it is actually in the embedded font\n        // file or if there isn't a font file so the fallback font is shown.\n        if (glyph.isInFont || font.missingFile) {\n          if (simpleFillText && !accent) {\n            // common case\n            ctx.fillText(character, scaledX, scaledY);\n          } else {\n            this.paintChar(character, scaledX, scaledY, patternTransform);\n            if (accent) {\n              scaledAccentX = scaledX + accent.offset.x / fontSizeScale;\n              scaledAccentY = scaledY - accent.offset.y / fontSizeScale;\n              this.paintChar(\n                accent.fontChar,\n                scaledAccentX,\n                scaledAccentY,\n                patternTransform\n              );\n            }\n          }\n        }\n\n        var charWidth;\n        if (vertical) {\n          charWidth = width * widthAdvanceScale - spacing * fontDirection;\n        } else {\n          charWidth = width * widthAdvanceScale + spacing * fontDirection;\n        }\n        x += charWidth;\n\n        if (restoreNeeded) {\n          ctx.restore();\n        }\n      }\n      if (vertical) {\n        current.y -= x;\n      } else {\n        current.x += x * textHScale;\n      }\n      ctx.restore();\n    },\n\n    showType3Text: function CanvasGraphics_showType3Text(glyphs) {\n      // Type3 fonts - each glyph is a \"mini-PDF\"\n      var ctx = this.ctx;\n      var current = this.current;\n      var font = current.font;\n      var fontSize = current.fontSize;\n      var fontDirection = current.fontDirection;\n      var spacingDir = font.vertical ? 1 : -1;\n      var charSpacing = current.charSpacing;\n      var wordSpacing = current.wordSpacing;\n      var textHScale = current.textHScale * fontDirection;\n      var fontMatrix = current.fontMatrix || FONT_IDENTITY_MATRIX;\n      var glyphsLength = glyphs.length;\n      var isTextInvisible =\n        current.textRenderingMode === TextRenderingMode.INVISIBLE;\n      var i, glyph, width, spacingLength;\n\n      if (isTextInvisible || fontSize === 0) {\n        return;\n      }\n      this._cachedGetSinglePixelWidth = null;\n\n      ctx.save();\n      ctx.transform.apply(ctx, current.textMatrix);\n      ctx.translate(current.x, current.y);\n\n      ctx.scale(textHScale, fontDirection);\n\n      for (i = 0; i < glyphsLength; ++i) {\n        glyph = glyphs[i];\n        if (isNum(glyph)) {\n          spacingLength = (spacingDir * glyph * fontSize) / 1000;\n          this.ctx.translate(spacingLength, 0);\n          current.x += spacingLength * textHScale;\n          continue;\n        }\n\n        var spacing = (glyph.isSpace ? wordSpacing : 0) + charSpacing;\n        var operatorList = font.charProcOperatorList[glyph.operatorListId];\n        if (!operatorList) {\n          warn(`Type3 character \"${glyph.operatorListId}\" is not available.`);\n          continue;\n        }\n        this.processingType3 = glyph;\n        this.save();\n        ctx.scale(fontSize, fontSize);\n        ctx.transform.apply(ctx, fontMatrix);\n        this.executeOperatorList(operatorList);\n        this.restore();\n\n        var transformed = Util.applyTransform([glyph.width, 0], fontMatrix);\n        width = transformed[0] * fontSize + spacing;\n\n        ctx.translate(width, 0);\n        current.x += width * textHScale;\n      }\n      ctx.restore();\n      this.processingType3 = null;\n    },\n\n    // Type3 fonts\n    setCharWidth: function CanvasGraphics_setCharWidth(xWidth, yWidth) {\n      // We can safely ignore this since the width should be the same\n      // as the width in the Widths array.\n    },\n    setCharWidthAndBounds: function CanvasGraphics_setCharWidthAndBounds(\n      xWidth,\n      yWidth,\n      llx,\n      lly,\n      urx,\n      ury\n    ) {\n      // TODO According to the spec we're also suppose to ignore any operators\n      // that set color or include images while processing this type3 font.\n      this.ctx.rect(llx, lly, urx - llx, ury - lly);\n      this.clip();\n      this.endPath();\n    },\n\n    // Color\n    getColorN_Pattern: function CanvasGraphics_getColorN_Pattern(IR) {\n      var pattern;\n      if (IR[0] === \"TilingPattern\") {\n        var color = IR[1];\n        var baseTransform =\n          this.baseTransform || this.ctx.mozCurrentTransform.slice();\n        var canvasGraphicsFactory = {\n          createCanvasGraphics: ctx => {\n            return new CanvasGraphics(\n              ctx,\n              this.commonObjs,\n              this.objs,\n              this.canvasFactory,\n              this.webGLContext\n            );\n          },\n        };\n        pattern = new TilingPattern(\n          IR,\n          color,\n          this.ctx,\n          canvasGraphicsFactory,\n          baseTransform\n        );\n      } else {\n        pattern = getShadingPatternFromIR(IR);\n      }\n      return pattern;\n    },\n    setStrokeColorN: function CanvasGraphics_setStrokeColorN() {\n      this.current.strokeColor = this.getColorN_Pattern(arguments);\n    },\n    setFillColorN: function CanvasGraphics_setFillColorN() {\n      this.current.fillColor = this.getColorN_Pattern(arguments);\n      this.current.patternFill = true;\n    },\n    setStrokeRGBColor: function CanvasGraphics_setStrokeRGBColor(r, g, b) {\n      var color = Util.makeCssRgb(r, g, b);\n      this.ctx.strokeStyle = color;\n      this.current.strokeColor = color;\n    },\n    setFillRGBColor: function CanvasGraphics_setFillRGBColor(r, g, b) {\n      var color = Util.makeCssRgb(r, g, b);\n      this.ctx.fillStyle = color;\n      this.current.fillColor = color;\n      this.current.patternFill = false;\n    },\n\n    shadingFill: function CanvasGraphics_shadingFill(patternIR) {\n      var ctx = this.ctx;\n\n      this.save();\n      var pattern = getShadingPatternFromIR(patternIR);\n      ctx.fillStyle = pattern.getPattern(ctx, this, true);\n\n      var inv = ctx.mozCurrentTransformInverse;\n      if (inv) {\n        var canvas = ctx.canvas;\n        var width = canvas.width;\n        var height = canvas.height;\n\n        var bl = Util.applyTransform([0, 0], inv);\n        var br = Util.applyTransform([0, height], inv);\n        var ul = Util.applyTransform([width, 0], inv);\n        var ur = Util.applyTransform([width, height], inv);\n\n        var x0 = Math.min(bl[0], br[0], ul[0], ur[0]);\n        var y0 = Math.min(bl[1], br[1], ul[1], ur[1]);\n        var x1 = Math.max(bl[0], br[0], ul[0], ur[0]);\n        var y1 = Math.max(bl[1], br[1], ul[1], ur[1]);\n\n        this.ctx.fillRect(x0, y0, x1 - x0, y1 - y0);\n      } else {\n        // HACK to draw the gradient onto an infinite rectangle.\n        // PDF gradients are drawn across the entire image while\n        // Canvas only allows gradients to be drawn in a rectangle\n        // The following bug should allow us to remove this.\n        // https://bugzilla.mozilla.org/show_bug.cgi?id=664884\n\n        this.ctx.fillRect(-1e10, -1e10, 2e10, 2e10);\n      }\n\n      this.restore();\n    },\n\n    // Images\n    beginInlineImage: function CanvasGraphics_beginInlineImage() {\n      unreachable(\"Should not call beginInlineImage\");\n    },\n    beginImageData: function CanvasGraphics_beginImageData() {\n      unreachable(\"Should not call beginImageData\");\n    },\n\n    paintFormXObjectBegin: function CanvasGraphics_paintFormXObjectBegin(\n      matrix,\n      bbox\n    ) {\n      this.save();\n      this.baseTransformStack.push(this.baseTransform);\n\n      if (Array.isArray(matrix) && matrix.length === 6) {\n        this.transform.apply(this, matrix);\n      }\n\n      this.baseTransform = this.ctx.mozCurrentTransform;\n\n      if (bbox) {\n        var width = bbox[2] - bbox[0];\n        var height = bbox[3] - bbox[1];\n        this.ctx.rect(bbox[0], bbox[1], width, height);\n        this.clip();\n        this.endPath();\n      }\n    },\n\n    paintFormXObjectEnd: function CanvasGraphics_paintFormXObjectEnd() {\n      this.restore();\n      this.baseTransform = this.baseTransformStack.pop();\n    },\n\n    beginGroup: function CanvasGraphics_beginGroup(group) {\n      this.save();\n      var currentCtx = this.ctx;\n      // TODO non-isolated groups - according to Rik at adobe non-isolated\n      // group results aren't usually that different and they even have tools\n      // that ignore this setting. Notes from Rik on implementing:\n      // - When you encounter an transparency group, create a new canvas with\n      // the dimensions of the bbox\n      // - copy the content from the previous canvas to the new canvas\n      // - draw as usual\n      // - remove the backdrop alpha:\n      // alphaNew = 1 - (1 - alpha)/(1 - alphaBackdrop) with 'alpha' the alpha\n      // value of your transparency group and 'alphaBackdrop' the alpha of the\n      // backdrop\n      // - remove background color:\n      // colorNew = color - alphaNew *colorBackdrop /(1 - alphaNew)\n      if (!group.isolated) {\n        info(\"TODO: Support non-isolated groups.\");\n      }\n\n      // TODO knockout - supposedly possible with the clever use of compositing\n      // modes.\n      if (group.knockout) {\n        warn(\"Knockout groups not supported.\");\n      }\n\n      var currentTransform = currentCtx.mozCurrentTransform;\n      if (group.matrix) {\n        currentCtx.transform.apply(currentCtx, group.matrix);\n      }\n      if (!group.bbox) {\n        throw new Error(\"Bounding box is required.\");\n      }\n\n      // Based on the current transform figure out how big the bounding box\n      // will actually be.\n      var bounds = Util.getAxialAlignedBoundingBox(\n        group.bbox,\n        currentCtx.mozCurrentTransform\n      );\n      // Clip the bounding box to the current canvas.\n      var canvasBounds = [\n        0,\n        0,\n        currentCtx.canvas.width,\n        currentCtx.canvas.height,\n      ];\n      bounds = Util.intersect(bounds, canvasBounds) || [0, 0, 0, 0];\n      // Use ceil in case we're between sizes so we don't create canvas that is\n      // too small and make the canvas at least 1x1 pixels.\n      var offsetX = Math.floor(bounds[0]);\n      var offsetY = Math.floor(bounds[1]);\n      var drawnWidth = Math.max(Math.ceil(bounds[2]) - offsetX, 1);\n      var drawnHeight = Math.max(Math.ceil(bounds[3]) - offsetY, 1);\n      var scaleX = 1,\n        scaleY = 1;\n      if (drawnWidth > MAX_GROUP_SIZE) {\n        scaleX = drawnWidth / MAX_GROUP_SIZE;\n        drawnWidth = MAX_GROUP_SIZE;\n      }\n      if (drawnHeight > MAX_GROUP_SIZE) {\n        scaleY = drawnHeight / MAX_GROUP_SIZE;\n        drawnHeight = MAX_GROUP_SIZE;\n      }\n\n      var cacheId = \"groupAt\" + this.groupLevel;\n      if (group.smask) {\n        // Using two cache entries is case if masks are used one after another.\n        cacheId += \"_smask_\" + (this.smaskCounter++ % 2);\n      }\n      var scratchCanvas = this.cachedCanvases.getCanvas(\n        cacheId,\n        drawnWidth,\n        drawnHeight,\n        true\n      );\n      var groupCtx = scratchCanvas.context;\n\n      // Since we created a new canvas that is just the size of the bounding box\n      // we have to translate the group ctx.\n      groupCtx.scale(1 / scaleX, 1 / scaleY);\n      groupCtx.translate(-offsetX, -offsetY);\n      groupCtx.transform.apply(groupCtx, currentTransform);\n\n      if (group.smask) {\n        // Saving state and cached mask to be used in setGState.\n        this.smaskStack.push({\n          canvas: scratchCanvas.canvas,\n          context: groupCtx,\n          offsetX,\n          offsetY,\n          scaleX,\n          scaleY,\n          subtype: group.smask.subtype,\n          backdrop: group.smask.backdrop,\n          transferMap: group.smask.transferMap || null,\n          startTransformInverse: null, // used during suspend operation\n        });\n      } else {\n        // Setup the current ctx so when the group is popped we draw it at the\n        // right location.\n        currentCtx.setTransform(1, 0, 0, 1, 0, 0);\n        currentCtx.translate(offsetX, offsetY);\n        currentCtx.scale(scaleX, scaleY);\n      }\n      // The transparency group inherits all off the current graphics state\n      // except the blend mode, soft mask, and alpha constants.\n      copyCtxState(currentCtx, groupCtx);\n      this.ctx = groupCtx;\n      this.setGState([\n        [\"BM\", \"source-over\"],\n        [\"ca\", 1],\n        [\"CA\", 1],\n      ]);\n      this.groupStack.push(currentCtx);\n      this.groupLevel++;\n\n      // Reseting mask state, masks will be applied on restore of the group.\n      this.current.activeSMask = null;\n    },\n\n    endGroup: function CanvasGraphics_endGroup(group) {\n      this.groupLevel--;\n      var groupCtx = this.ctx;\n      this.ctx = this.groupStack.pop();\n      // Turn off image smoothing to avoid sub pixel interpolation which can\n      // look kind of blurry for some pdfs.\n      if (this.ctx.imageSmoothingEnabled !== undefined) {\n        this.ctx.imageSmoothingEnabled = false;\n      } else {\n        this.ctx.mozImageSmoothingEnabled = false;\n      }\n      if (group.smask) {\n        this.tempSMask = this.smaskStack.pop();\n      } else {\n        this.ctx.drawImage(groupCtx.canvas, 0, 0);\n      }\n      this.restore();\n    },\n\n    beginAnnotations: function CanvasGraphics_beginAnnotations() {\n      this.save();\n      if (this.baseTransform) {\n        this.ctx.setTransform.apply(this.ctx, this.baseTransform);\n      }\n    },\n\n    endAnnotations: function CanvasGraphics_endAnnotations() {\n      this.restore();\n    },\n\n    beginAnnotation: function CanvasGraphics_beginAnnotation(\n      rect,\n      transform,\n      matrix\n    ) {\n      this.save();\n      resetCtxToDefault(this.ctx);\n      this.current = new CanvasExtraState();\n\n      if (Array.isArray(rect) && rect.length === 4) {\n        var width = rect[2] - rect[0];\n        var height = rect[3] - rect[1];\n        this.ctx.rect(rect[0], rect[1], width, height);\n        this.clip();\n        this.endPath();\n      }\n\n      this.transform.apply(this, transform);\n      this.transform.apply(this, matrix);\n    },\n\n    endAnnotation: function CanvasGraphics_endAnnotation() {\n      this.restore();\n    },\n\n    paintImageMaskXObject: function CanvasGraphics_paintImageMaskXObject(img) {\n      var ctx = this.ctx;\n      var width = img.width,\n        height = img.height;\n      var fillColor = this.current.fillColor;\n      var isPatternFill = this.current.patternFill;\n\n      var glyph = this.processingType3;\n\n      if (COMPILE_TYPE3_GLYPHS && glyph && glyph.compiled === undefined) {\n        if (width <= MAX_SIZE_TO_COMPILE && height <= MAX_SIZE_TO_COMPILE) {\n          glyph.compiled = compileType3Glyph({ data: img.data, width, height });\n        } else {\n          glyph.compiled = null;\n        }\n      }\n\n      if (glyph && glyph.compiled) {\n        glyph.compiled(ctx);\n        return;\n      }\n\n      var maskCanvas = this.cachedCanvases.getCanvas(\n        \"maskCanvas\",\n        width,\n        height\n      );\n      var maskCtx = maskCanvas.context;\n      maskCtx.save();\n\n      putBinaryImageMask(maskCtx, img);\n\n      maskCtx.globalCompositeOperation = \"source-in\";\n\n      maskCtx.fillStyle = isPatternFill\n        ? fillColor.getPattern(maskCtx, this)\n        : fillColor;\n      maskCtx.fillRect(0, 0, width, height);\n\n      maskCtx.restore();\n\n      this.paintInlineImageXObject(maskCanvas.canvas);\n    },\n\n    paintImageMaskXObjectRepeat: function CanvasGraphics_paintImageMaskXObjectRepeat(\n      imgData,\n      scaleX,\n      scaleY,\n      positions\n    ) {\n      var width = imgData.width;\n      var height = imgData.height;\n      var fillColor = this.current.fillColor;\n      var isPatternFill = this.current.patternFill;\n\n      var maskCanvas = this.cachedCanvases.getCanvas(\n        \"maskCanvas\",\n        width,\n        height\n      );\n      var maskCtx = maskCanvas.context;\n      maskCtx.save();\n\n      putBinaryImageMask(maskCtx, imgData);\n\n      maskCtx.globalCompositeOperation = \"source-in\";\n\n      maskCtx.fillStyle = isPatternFill\n        ? fillColor.getPattern(maskCtx, this)\n        : fillColor;\n      maskCtx.fillRect(0, 0, width, height);\n\n      maskCtx.restore();\n\n      var ctx = this.ctx;\n      for (var i = 0, ii = positions.length; i < ii; i += 2) {\n        ctx.save();\n        ctx.transform(scaleX, 0, 0, scaleY, positions[i], positions[i + 1]);\n        ctx.scale(1, -1);\n        ctx.drawImage(maskCanvas.canvas, 0, 0, width, height, 0, -1, 1, 1);\n        ctx.restore();\n      }\n    },\n\n    paintImageMaskXObjectGroup: function CanvasGraphics_paintImageMaskXObjectGroup(\n      images\n    ) {\n      var ctx = this.ctx;\n\n      var fillColor = this.current.fillColor;\n      var isPatternFill = this.current.patternFill;\n      for (var i = 0, ii = images.length; i < ii; i++) {\n        var image = images[i];\n        var width = image.width,\n          height = image.height;\n\n        var maskCanvas = this.cachedCanvases.getCanvas(\n          \"maskCanvas\",\n          width,\n          height\n        );\n        var maskCtx = maskCanvas.context;\n        maskCtx.save();\n\n        putBinaryImageMask(maskCtx, image);\n\n        maskCtx.globalCompositeOperation = \"source-in\";\n\n        maskCtx.fillStyle = isPatternFill\n          ? fillColor.getPattern(maskCtx, this)\n          : fillColor;\n        maskCtx.fillRect(0, 0, width, height);\n\n        maskCtx.restore();\n\n        ctx.save();\n        ctx.transform.apply(ctx, image.transform);\n        ctx.scale(1, -1);\n        ctx.drawImage(maskCanvas.canvas, 0, 0, width, height, 0, -1, 1, 1);\n        ctx.restore();\n      }\n    },\n\n    paintImageXObject: function CanvasGraphics_paintImageXObject(objId) {\n      const imgData = objId.startsWith(\"g_\")\n        ? this.commonObjs.get(objId)\n        : this.objs.get(objId);\n      if (!imgData) {\n        warn(\"Dependent image isn't ready yet\");\n        return;\n      }\n\n      this.paintInlineImageXObject(imgData);\n    },\n\n    paintImageXObjectRepeat: function CanvasGraphics_paintImageXObjectRepeat(\n      objId,\n      scaleX,\n      scaleY,\n      positions\n    ) {\n      const imgData = objId.startsWith(\"g_\")\n        ? this.commonObjs.get(objId)\n        : this.objs.get(objId);\n      if (!imgData) {\n        warn(\"Dependent image isn't ready yet\");\n        return;\n      }\n\n      var width = imgData.width;\n      var height = imgData.height;\n      var map = [];\n      for (var i = 0, ii = positions.length; i < ii; i += 2) {\n        map.push({\n          transform: [scaleX, 0, 0, scaleY, positions[i], positions[i + 1]],\n          x: 0,\n          y: 0,\n          w: width,\n          h: height,\n        });\n      }\n      this.paintInlineImageXObjectGroup(imgData, map);\n    },\n\n    paintInlineImageXObject: function CanvasGraphics_paintInlineImageXObject(\n      imgData\n    ) {\n      var width = imgData.width;\n      var height = imgData.height;\n      var ctx = this.ctx;\n\n      this.save();\n      // scale the image to the unit square\n      ctx.scale(1 / width, -1 / height);\n\n      var currentTransform = ctx.mozCurrentTransformInverse;\n      var a = currentTransform[0],\n        b = currentTransform[1];\n      var widthScale = Math.max(Math.sqrt(a * a + b * b), 1);\n      var c = currentTransform[2],\n        d = currentTransform[3];\n      var heightScale = Math.max(Math.sqrt(c * c + d * d), 1);\n\n      var imgToPaint, tmpCanvas;\n      // typeof check is needed due to node.js support, see issue #8489\n      if (\n        (typeof HTMLElement === \"function\" && imgData instanceof HTMLElement) ||\n        !imgData.data\n      ) {\n        imgToPaint = imgData;\n      } else {\n        tmpCanvas = this.cachedCanvases.getCanvas(\"inlineImage\", width, height);\n        var tmpCtx = tmpCanvas.context;\n        putBinaryImageData(tmpCtx, imgData);\n        imgToPaint = tmpCanvas.canvas;\n      }\n\n      var paintWidth = width,\n        paintHeight = height;\n      var tmpCanvasId = \"prescale1\";\n      // Vertical or horizontal scaling shall not be more than 2 to not lose the\n      // pixels during drawImage operation, painting on the temporary canvas(es)\n      // that are twice smaller in size.\n      while (\n        (widthScale > 2 && paintWidth > 1) ||\n        (heightScale > 2 && paintHeight > 1)\n      ) {\n        var newWidth = paintWidth,\n          newHeight = paintHeight;\n        if (widthScale > 2 && paintWidth > 1) {\n          newWidth = Math.ceil(paintWidth / 2);\n          widthScale /= paintWidth / newWidth;\n        }\n        if (heightScale > 2 && paintHeight > 1) {\n          newHeight = Math.ceil(paintHeight / 2);\n          heightScale /= paintHeight / newHeight;\n        }\n        tmpCanvas = this.cachedCanvases.getCanvas(\n          tmpCanvasId,\n          newWidth,\n          newHeight\n        );\n        tmpCtx = tmpCanvas.context;\n        tmpCtx.clearRect(0, 0, newWidth, newHeight);\n        tmpCtx.drawImage(\n          imgToPaint,\n          0,\n          0,\n          paintWidth,\n          paintHeight,\n          0,\n          0,\n          newWidth,\n          newHeight\n        );\n        imgToPaint = tmpCanvas.canvas;\n        paintWidth = newWidth;\n        paintHeight = newHeight;\n        tmpCanvasId = tmpCanvasId === \"prescale1\" ? \"prescale2\" : \"prescale1\";\n      }\n      ctx.drawImage(\n        imgToPaint,\n        0,\n        0,\n        paintWidth,\n        paintHeight,\n        0,\n        -height,\n        width,\n        height\n      );\n\n      if (this.imageLayer) {\n        var position = this.getCanvasPosition(0, -height);\n        this.imageLayer.appendImage({\n          imgData,\n          left: position[0],\n          top: position[1],\n          width: width / currentTransform[0],\n          height: height / currentTransform[3],\n        });\n      }\n      this.restore();\n    },\n\n    paintInlineImageXObjectGroup: function CanvasGraphics_paintInlineImageXObjectGroup(\n      imgData,\n      map\n    ) {\n      var ctx = this.ctx;\n      var w = imgData.width;\n      var h = imgData.height;\n\n      var tmpCanvas = this.cachedCanvases.getCanvas(\"inlineImage\", w, h);\n      var tmpCtx = tmpCanvas.context;\n      putBinaryImageData(tmpCtx, imgData);\n\n      for (var i = 0, ii = map.length; i < ii; i++) {\n        var entry = map[i];\n        ctx.save();\n        ctx.transform.apply(ctx, entry.transform);\n        ctx.scale(1, -1);\n        ctx.drawImage(\n          tmpCanvas.canvas,\n          entry.x,\n          entry.y,\n          entry.w,\n          entry.h,\n          0,\n          -1,\n          1,\n          1\n        );\n        if (this.imageLayer) {\n          var position = this.getCanvasPosition(entry.x, entry.y);\n          this.imageLayer.appendImage({\n            imgData,\n            left: position[0],\n            top: position[1],\n            width: w,\n            height: h,\n          });\n        }\n        ctx.restore();\n      }\n    },\n\n    paintSolidColorImageMask: function CanvasGraphics_paintSolidColorImageMask() {\n      this.ctx.fillRect(0, 0, 1, 1);\n    },\n\n    paintXObject: function CanvasGraphics_paintXObject() {\n      warn(\"Unsupported 'paintXObject' command.\");\n    },\n\n    // Marked content\n\n    markPoint: function CanvasGraphics_markPoint(tag) {\n      // TODO Marked content.\n    },\n    markPointProps: function CanvasGraphics_markPointProps(tag, properties) {\n      // TODO Marked content.\n    },\n    beginMarkedContent: function CanvasGraphics_beginMarkedContent(tag) {\n      // TODO Marked content.\n    },\n    beginMarkedContentProps: function CanvasGraphics_beginMarkedContentProps(\n      tag,\n      properties\n    ) {\n      // TODO Marked content.\n    },\n    endMarkedContent: function CanvasGraphics_endMarkedContent() {\n      // TODO Marked content.\n    },\n\n    // Compatibility\n\n    beginCompat: function CanvasGraphics_beginCompat() {\n      // TODO ignore undefined operators (should we do that anyway?)\n    },\n    endCompat: function CanvasGraphics_endCompat() {\n      // TODO stop ignoring undefined operators\n    },\n\n    // Helper functions\n\n    consumePath: function CanvasGraphics_consumePath() {\n      var ctx = this.ctx;\n      if (this.pendingClip) {\n        if (this.pendingClip === EO_CLIP) {\n          ctx.clip(\"evenodd\");\n        } else {\n          ctx.clip();\n        }\n        this.pendingClip = null;\n      }\n      ctx.beginPath();\n    },\n    getSinglePixelWidth(scale) {\n      if (this._cachedGetSinglePixelWidth === null) {\n        const inverse = this.ctx.mozCurrentTransformInverse;\n        // max of the current horizontal and vertical scale\n        this._cachedGetSinglePixelWidth = Math.sqrt(\n          Math.max(\n            inverse[0] * inverse[0] + inverse[1] * inverse[1],\n            inverse[2] * inverse[2] + inverse[3] * inverse[3]\n          )\n        );\n      }\n      return this._cachedGetSinglePixelWidth;\n    },\n    getCanvasPosition: function CanvasGraphics_getCanvasPosition(x, y) {\n      var transform = this.ctx.mozCurrentTransform;\n      return [\n        transform[0] * x + transform[2] * y + transform[4],\n        transform[1] * x + transform[3] * y + transform[5],\n      ];\n    },\n  };\n\n  for (var op in OPS) {\n    CanvasGraphics.prototype[OPS[op]] = CanvasGraphics.prototype[op];\n  }\n\n  return CanvasGraphics;\n})();\n\nexport { CanvasGraphics };\n","/* Copyright 2014 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FormatError, info, Util } from \"../shared/util.js\";\n\nvar ShadingIRs = {};\n\nfunction applyBoundingBox(ctx, bbox) {\n  if (!bbox || typeof Path2D === \"undefined\") {\n    return;\n  }\n  const width = bbox[2] - bbox[0];\n  const height = bbox[3] - bbox[1];\n  const region = new Path2D();\n  region.rect(bbox[0], bbox[1], width, height);\n  ctx.clip(region);\n}\n\nShadingIRs.RadialAxial = {\n  fromIR: function RadialAxial_fromIR(raw) {\n    var type = raw[1];\n    var bbox = raw[2];\n    var colorStops = raw[3];\n    var p0 = raw[4];\n    var p1 = raw[5];\n    var r0 = raw[6];\n    var r1 = raw[7];\n    return {\n      type: \"Pattern\",\n      getPattern: function RadialAxial_getPattern(ctx) {\n        applyBoundingBox(ctx, bbox);\n        var grad;\n        if (type === \"axial\") {\n          grad = ctx.createLinearGradient(p0[0], p0[1], p1[0], p1[1]);\n        } else if (type === \"radial\") {\n          grad = ctx.createRadialGradient(p0[0], p0[1], r0, p1[0], p1[1], r1);\n        }\n\n        for (var i = 0, ii = colorStops.length; i < ii; ++i) {\n          var c = colorStops[i];\n          grad.addColorStop(c[0], c[1]);\n        }\n        return grad;\n      },\n    };\n  },\n};\n\nvar createMeshCanvas = (function createMeshCanvasClosure() {\n  function drawTriangle(data, context, p1, p2, p3, c1, c2, c3) {\n    // Very basic Gouraud-shaded triangle rasterization algorithm.\n    var coords = context.coords,\n      colors = context.colors;\n    var bytes = data.data,\n      rowSize = data.width * 4;\n    var tmp;\n    if (coords[p1 + 1] > coords[p2 + 1]) {\n      tmp = p1;\n      p1 = p2;\n      p2 = tmp;\n      tmp = c1;\n      c1 = c2;\n      c2 = tmp;\n    }\n    if (coords[p2 + 1] > coords[p3 + 1]) {\n      tmp = p2;\n      p2 = p3;\n      p3 = tmp;\n      tmp = c2;\n      c2 = c3;\n      c3 = tmp;\n    }\n    if (coords[p1 + 1] > coords[p2 + 1]) {\n      tmp = p1;\n      p1 = p2;\n      p2 = tmp;\n      tmp = c1;\n      c1 = c2;\n      c2 = tmp;\n    }\n    var x1 = (coords[p1] + context.offsetX) * context.scaleX;\n    var y1 = (coords[p1 + 1] + context.offsetY) * context.scaleY;\n    var x2 = (coords[p2] + context.offsetX) * context.scaleX;\n    var y2 = (coords[p2 + 1] + context.offsetY) * context.scaleY;\n    var x3 = (coords[p3] + context.offsetX) * context.scaleX;\n    var y3 = (coords[p3 + 1] + context.offsetY) * context.scaleY;\n    if (y1 >= y3) {\n      return;\n    }\n    var c1r = colors[c1],\n      c1g = colors[c1 + 1],\n      c1b = colors[c1 + 2];\n    var c2r = colors[c2],\n      c2g = colors[c2 + 1],\n      c2b = colors[c2 + 2];\n    var c3r = colors[c3],\n      c3g = colors[c3 + 1],\n      c3b = colors[c3 + 2];\n\n    var minY = Math.round(y1),\n      maxY = Math.round(y3);\n    var xa, car, cag, cab;\n    var xb, cbr, cbg, cbb;\n    for (var y = minY; y <= maxY; y++) {\n      if (y < y2) {\n        let k;\n        if (y < y1) {\n          k = 0;\n        } else if (y1 === y2) {\n          k = 1;\n        } else {\n          k = (y1 - y) / (y1 - y2);\n        }\n        xa = x1 - (x1 - x2) * k;\n        car = c1r - (c1r - c2r) * k;\n        cag = c1g - (c1g - c2g) * k;\n        cab = c1b - (c1b - c2b) * k;\n      } else {\n        let k;\n        if (y > y3) {\n          k = 1;\n        } else if (y2 === y3) {\n          k = 0;\n        } else {\n          k = (y2 - y) / (y2 - y3);\n        }\n        xa = x2 - (x2 - x3) * k;\n        car = c2r - (c2r - c3r) * k;\n        cag = c2g - (c2g - c3g) * k;\n        cab = c2b - (c2b - c3b) * k;\n      }\n\n      let k;\n      if (y < y1) {\n        k = 0;\n      } else if (y > y3) {\n        k = 1;\n      } else {\n        k = (y1 - y) / (y1 - y3);\n      }\n      xb = x1 - (x1 - x3) * k;\n      cbr = c1r - (c1r - c3r) * k;\n      cbg = c1g - (c1g - c3g) * k;\n      cbb = c1b - (c1b - c3b) * k;\n      var x1_ = Math.round(Math.min(xa, xb));\n      var x2_ = Math.round(Math.max(xa, xb));\n      var j = rowSize * y + x1_ * 4;\n      for (var x = x1_; x <= x2_; x++) {\n        k = (xa - x) / (xa - xb);\n        if (k < 0) {\n          k = 0;\n        } else if (k > 1) {\n          k = 1;\n        }\n        bytes[j++] = (car - (car - cbr) * k) | 0;\n        bytes[j++] = (cag - (cag - cbg) * k) | 0;\n        bytes[j++] = (cab - (cab - cbb) * k) | 0;\n        bytes[j++] = 255;\n      }\n    }\n  }\n\n  function drawFigure(data, figure, context) {\n    var ps = figure.coords;\n    var cs = figure.colors;\n    var i, ii;\n    switch (figure.type) {\n      case \"lattice\":\n        var verticesPerRow = figure.verticesPerRow;\n        var rows = Math.floor(ps.length / verticesPerRow) - 1;\n        var cols = verticesPerRow - 1;\n        for (i = 0; i < rows; i++) {\n          var q = i * verticesPerRow;\n          for (var j = 0; j < cols; j++, q++) {\n            drawTriangle(\n              data,\n              context,\n              ps[q],\n              ps[q + 1],\n              ps[q + verticesPerRow],\n              cs[q],\n              cs[q + 1],\n              cs[q + verticesPerRow]\n            );\n            drawTriangle(\n              data,\n              context,\n              ps[q + verticesPerRow + 1],\n              ps[q + 1],\n              ps[q + verticesPerRow],\n              cs[q + verticesPerRow + 1],\n              cs[q + 1],\n              cs[q + verticesPerRow]\n            );\n          }\n        }\n        break;\n      case \"triangles\":\n        for (i = 0, ii = ps.length; i < ii; i += 3) {\n          drawTriangle(\n            data,\n            context,\n            ps[i],\n            ps[i + 1],\n            ps[i + 2],\n            cs[i],\n            cs[i + 1],\n            cs[i + 2]\n          );\n        }\n        break;\n      default:\n        throw new Error(\"illegal figure\");\n    }\n  }\n\n  // eslint-disable-next-line no-shadow\n  function createMeshCanvas(\n    bounds,\n    combinesScale,\n    coords,\n    colors,\n    figures,\n    backgroundColor,\n    cachedCanvases,\n    webGLContext\n  ) {\n    // we will increase scale on some weird factor to let antialiasing take\n    // care of \"rough\" edges\n    var EXPECTED_SCALE = 1.1;\n    // MAX_PATTERN_SIZE is used to avoid OOM situation.\n    var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough\n    // We need to keep transparent border around our pattern for fill():\n    // createPattern with 'no-repeat' will bleed edges across entire area.\n    var BORDER_SIZE = 2;\n\n    var offsetX = Math.floor(bounds[0]);\n    var offsetY = Math.floor(bounds[1]);\n    var boundsWidth = Math.ceil(bounds[2]) - offsetX;\n    var boundsHeight = Math.ceil(bounds[3]) - offsetY;\n\n    var width = Math.min(\n      Math.ceil(Math.abs(boundsWidth * combinesScale[0] * EXPECTED_SCALE)),\n      MAX_PATTERN_SIZE\n    );\n    var height = Math.min(\n      Math.ceil(Math.abs(boundsHeight * combinesScale[1] * EXPECTED_SCALE)),\n      MAX_PATTERN_SIZE\n    );\n    var scaleX = boundsWidth / width;\n    var scaleY = boundsHeight / height;\n\n    var context = {\n      coords,\n      colors,\n      offsetX: -offsetX,\n      offsetY: -offsetY,\n      scaleX: 1 / scaleX,\n      scaleY: 1 / scaleY,\n    };\n\n    var paddedWidth = width + BORDER_SIZE * 2;\n    var paddedHeight = height + BORDER_SIZE * 2;\n\n    var canvas, tmpCanvas, i, ii;\n    if (webGLContext.isEnabled) {\n      canvas = webGLContext.drawFigures({\n        width,\n        height,\n        backgroundColor,\n        figures,\n        context,\n      });\n      // https://bugzilla.mozilla.org/show_bug.cgi?id=972126\n      tmpCanvas = cachedCanvases.getCanvas(\n        \"mesh\",\n        paddedWidth,\n        paddedHeight,\n        false\n      );\n      tmpCanvas.context.drawImage(canvas, BORDER_SIZE, BORDER_SIZE);\n      canvas = tmpCanvas.canvas;\n    } else {\n      tmpCanvas = cachedCanvases.getCanvas(\n        \"mesh\",\n        paddedWidth,\n        paddedHeight,\n        false\n      );\n      var tmpCtx = tmpCanvas.context;\n\n      var data = tmpCtx.createImageData(width, height);\n      if (backgroundColor) {\n        var bytes = data.data;\n        for (i = 0, ii = bytes.length; i < ii; i += 4) {\n          bytes[i] = backgroundColor[0];\n          bytes[i + 1] = backgroundColor[1];\n          bytes[i + 2] = backgroundColor[2];\n          bytes[i + 3] = 255;\n        }\n      }\n      for (i = 0; i < figures.length; i++) {\n        drawFigure(data, figures[i], context);\n      }\n      tmpCtx.putImageData(data, BORDER_SIZE, BORDER_SIZE);\n      canvas = tmpCanvas.canvas;\n    }\n\n    return {\n      canvas,\n      offsetX: offsetX - BORDER_SIZE * scaleX,\n      offsetY: offsetY - BORDER_SIZE * scaleY,\n      scaleX,\n      scaleY,\n    };\n  }\n  return createMeshCanvas;\n})();\n\nShadingIRs.Mesh = {\n  fromIR: function Mesh_fromIR(raw) {\n    // var type = raw[1];\n    var coords = raw[2];\n    var colors = raw[3];\n    var figures = raw[4];\n    var bounds = raw[5];\n    var matrix = raw[6];\n    var bbox = raw[7];\n    var background = raw[8];\n    return {\n      type: \"Pattern\",\n      getPattern: function Mesh_getPattern(ctx, owner, shadingFill) {\n        applyBoundingBox(ctx, bbox);\n        var scale;\n        if (shadingFill) {\n          scale = Util.singularValueDecompose2dScale(ctx.mozCurrentTransform);\n        } else {\n          // Obtain scale from matrix and current transformation matrix.\n          scale = Util.singularValueDecompose2dScale(owner.baseTransform);\n          if (matrix) {\n            var matrixScale = Util.singularValueDecompose2dScale(matrix);\n            scale = [scale[0] * matrixScale[0], scale[1] * matrixScale[1]];\n          }\n        }\n\n        // Rasterizing on the main thread since sending/queue large canvases\n        // might cause OOM.\n        var temporaryPatternCanvas = createMeshCanvas(\n          bounds,\n          scale,\n          coords,\n          colors,\n          figures,\n          shadingFill ? null : background,\n          owner.cachedCanvases,\n          owner.webGLContext\n        );\n\n        if (!shadingFill) {\n          ctx.setTransform.apply(ctx, owner.baseTransform);\n          if (matrix) {\n            ctx.transform.apply(ctx, matrix);\n          }\n        }\n\n        ctx.translate(\n          temporaryPatternCanvas.offsetX,\n          temporaryPatternCanvas.offsetY\n        );\n        ctx.scale(temporaryPatternCanvas.scaleX, temporaryPatternCanvas.scaleY);\n\n        return ctx.createPattern(temporaryPatternCanvas.canvas, \"no-repeat\");\n      },\n    };\n  },\n};\n\nShadingIRs.Dummy = {\n  fromIR: function Dummy_fromIR() {\n    return {\n      type: \"Pattern\",\n      getPattern: function Dummy_fromIR_getPattern() {\n        return \"hotpink\";\n      },\n    };\n  },\n};\n\nfunction getShadingPatternFromIR(raw) {\n  var shadingIR = ShadingIRs[raw[0]];\n  if (!shadingIR) {\n    throw new Error(`Unknown IR type: ${raw[0]}`);\n  }\n  return shadingIR.fromIR(raw);\n}\n\nvar TilingPattern = (function TilingPatternClosure() {\n  var PaintType = {\n    COLORED: 1,\n    UNCOLORED: 2,\n  };\n\n  var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough\n\n  // eslint-disable-next-line no-shadow\n  function TilingPattern(IR, color, ctx, canvasGraphicsFactory, baseTransform) {\n    this.operatorList = IR[2];\n    this.matrix = IR[3] || [1, 0, 0, 1, 0, 0];\n    this.bbox = IR[4];\n    this.xstep = IR[5];\n    this.ystep = IR[6];\n    this.paintType = IR[7];\n    this.tilingType = IR[8];\n    this.color = color;\n    this.canvasGraphicsFactory = canvasGraphicsFactory;\n    this.baseTransform = baseTransform;\n    this.type = \"Pattern\";\n    this.ctx = ctx;\n  }\n\n  TilingPattern.prototype = {\n    createPatternCanvas: function TilinPattern_createPatternCanvas(owner) {\n      var operatorList = this.operatorList;\n      var bbox = this.bbox;\n      var xstep = this.xstep;\n      var ystep = this.ystep;\n      var paintType = this.paintType;\n      var tilingType = this.tilingType;\n      var color = this.color;\n      var canvasGraphicsFactory = this.canvasGraphicsFactory;\n\n      info(\"TilingType: \" + tilingType);\n\n      // A tiling pattern as defined by PDF spec 8.7.2 is a cell whose size is\n      // described by bbox, and may repeat regularly by shifting the cell by\n      // xstep and ystep.\n      // Because the HTML5 canvas API does not support pattern repetition with\n      // gaps in between, we use the xstep/ystep instead of the bbox's size.\n      //\n      // This has the following consequences (similarly for ystep):\n      //\n      // - If xstep is the same as bbox, then there is no observable difference.\n      //\n      // - If xstep is larger than bbox, then the pattern canvas is partially\n      //   empty: the area bounded by bbox is painted, the outside area is void.\n      //\n      // - If xstep is smaller than bbox, then the pixels between xstep and the\n      //   bbox boundary will be missing. This is INCORRECT behavior.\n      //   \"Figures on adjacent tiles should not overlap\" (PDF spec 8.7.3.1),\n      //   but overlapping cells without common pixels are still valid.\n      //   TODO: Fix the implementation, to allow this scenario to be painted\n      //   correctly.\n\n      var x0 = bbox[0],\n        y0 = bbox[1],\n        x1 = bbox[2],\n        y1 = bbox[3];\n\n      // Obtain scale from matrix and current transformation matrix.\n      var matrixScale = Util.singularValueDecompose2dScale(this.matrix);\n      var curMatrixScale = Util.singularValueDecompose2dScale(\n        this.baseTransform\n      );\n      var combinedScale = [\n        matrixScale[0] * curMatrixScale[0],\n        matrixScale[1] * curMatrixScale[1],\n      ];\n\n      // Use width and height values that are as close as possible to the end\n      // result when the pattern is used. Too low value makes the pattern look\n      // blurry. Too large value makes it look too crispy.\n      var dimx = this.getSizeAndScale(\n        xstep,\n        this.ctx.canvas.width,\n        combinedScale[0]\n      );\n      var dimy = this.getSizeAndScale(\n        ystep,\n        this.ctx.canvas.height,\n        combinedScale[1]\n      );\n\n      var tmpCanvas = owner.cachedCanvases.getCanvas(\n        \"pattern\",\n        dimx.size,\n        dimy.size,\n        true\n      );\n      var tmpCtx = tmpCanvas.context;\n      var graphics = canvasGraphicsFactory.createCanvasGraphics(tmpCtx);\n      graphics.groupLevel = owner.groupLevel;\n\n      this.setFillAndStrokeStyleToContext(graphics, paintType, color);\n\n      graphics.transform(dimx.scale, 0, 0, dimy.scale, 0, 0);\n\n      // transform coordinates to pattern space\n      graphics.transform(1, 0, 0, 1, -x0, -y0);\n\n      this.clipBbox(graphics, bbox, x0, y0, x1, y1);\n\n      graphics.executeOperatorList(operatorList);\n\n      this.ctx.transform(1, 0, 0, 1, x0, y0);\n\n      // Rescale canvas so that the ctx.createPattern call generates a pattern\n      // with the desired size.\n      this.ctx.scale(1 / dimx.scale, 1 / dimy.scale);\n      return tmpCanvas.canvas;\n    },\n\n    getSizeAndScale: function TilingPattern_getSizeAndScale(\n      step,\n      realOutputSize,\n      scale\n    ) {\n      // xstep / ystep may be negative -- normalize.\n      step = Math.abs(step);\n      // MAX_PATTERN_SIZE is used to avoid OOM situation.\n      // Use the destination canvas's size if it is bigger than the hard-coded\n      // limit of MAX_PATTERN_SIZE to avoid clipping patterns that cover the\n      // whole canvas.\n      var maxSize = Math.max(MAX_PATTERN_SIZE, realOutputSize);\n      var size = Math.ceil(step * scale);\n      if (size >= maxSize) {\n        size = maxSize;\n      } else {\n        scale = size / step;\n      }\n      return { scale, size };\n    },\n\n    clipBbox: function clipBbox(graphics, bbox, x0, y0, x1, y1) {\n      if (Array.isArray(bbox) && bbox.length === 4) {\n        var bboxWidth = x1 - x0;\n        var bboxHeight = y1 - y0;\n        graphics.ctx.rect(x0, y0, bboxWidth, bboxHeight);\n        graphics.clip();\n        graphics.endPath();\n      }\n    },\n\n    setFillAndStrokeStyleToContext: function setFillAndStrokeStyleToContext(\n      graphics,\n      paintType,\n      color\n    ) {\n      const context = graphics.ctx,\n        current = graphics.current;\n      switch (paintType) {\n        case PaintType.COLORED:\n          var ctx = this.ctx;\n          context.fillStyle = ctx.fillStyle;\n          context.strokeStyle = ctx.strokeStyle;\n          current.fillColor = ctx.fillStyle;\n          current.strokeColor = ctx.strokeStyle;\n          break;\n        case PaintType.UNCOLORED:\n          var cssColor = Util.makeCssRgb(color[0], color[1], color[2]);\n          context.fillStyle = cssColor;\n          context.strokeStyle = cssColor;\n          // Set color needed by image masks (fixes issues 3226 and 8741).\n          current.fillColor = cssColor;\n          current.strokeColor = cssColor;\n          break;\n        default:\n          throw new FormatError(`Unsupported paint type: ${paintType}`);\n      }\n    },\n\n    getPattern: function TilingPattern_getPattern(ctx, owner) {\n      ctx = this.ctx;\n      // PDF spec 8.7.2 NOTE 1: pattern's matrix is relative to initial matrix.\n      ctx.setTransform.apply(ctx, this.baseTransform);\n      ctx.transform.apply(ctx, this.matrix);\n\n      var temporaryPatternCanvas = this.createPatternCanvas(owner);\n\n      return ctx.createPattern(temporaryPatternCanvas, \"repeat\");\n    },\n  };\n\n  return TilingPattern;\n})();\n\nexport { getShadingPatternFromIR, TilingPattern };\n","/* Copyright 2018 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nconst GlobalWorkerOptions = Object.create(null);\n\n/**\n * Defines global port for worker process. Overrides the `workerSrc` option.\n * @var {Object}\n */\nGlobalWorkerOptions.workerPort =\n  GlobalWorkerOptions.workerPort === undefined\n    ? null\n    : GlobalWorkerOptions.workerPort;\n\n/**\n * A string containing the path and filename of the worker file.\n *\n * NOTE: The `workerSrc` option should always be set, in order to prevent any\n *       issues when using the PDF.js library.\n * @var {string}\n */\nGlobalWorkerOptions.workerSrc =\n  GlobalWorkerOptions.workerSrc === undefined\n    ? \"\"\n    : GlobalWorkerOptions.workerSrc;\n\nexport { GlobalWorkerOptions };\n","/* Copyright 2018 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* eslint no-var: error, prefer-const: error */\n\nimport {\n  AbortException,\n  assert,\n  createPromiseCapability,\n  MissingPDFException,\n  UnexpectedResponseException,\n  UnknownErrorException,\n} from \"./util.js\";\n\nconst CallbackKind = {\n  UNKNOWN: 0,\n  DATA: 1,\n  ERROR: 2,\n};\n\nconst StreamKind = {\n  UNKNOWN: 0,\n  CANCEL: 1,\n  CANCEL_COMPLETE: 2,\n  CLOSE: 3,\n  ENQUEUE: 4,\n  ERROR: 5,\n  PULL: 6,\n  PULL_COMPLETE: 7,\n  START_COMPLETE: 8,\n};\n\nfunction wrapReason(reason) {\n  if (\n    typeof PDFJSDev === \"undefined\" ||\n    PDFJSDev.test(\"!PRODUCTION || TESTING\")\n  ) {\n    assert(\n      reason instanceof Error ||\n        (typeof reason === \"object\" && reason !== null),\n      'wrapReason: Expected \"reason\" to be a (possibly cloned) Error.'\n    );\n  } else {\n    if (typeof reason !== \"object\" || reason === null) {\n      return reason;\n    }\n  }\n  switch (reason.name) {\n    case \"AbortException\":\n      return new AbortException(reason.message);\n    case \"MissingPDFException\":\n      return new MissingPDFException(reason.message);\n    case \"UnexpectedResponseException\":\n      return new UnexpectedResponseException(reason.message, reason.status);\n    case \"UnknownErrorException\":\n      return new UnknownErrorException(reason.message, reason.details);\n    default:\n      return new UnknownErrorException(reason.message, reason.toString());\n  }\n}\n\nclass MessageHandler {\n  constructor(sourceName, targetName, comObj) {\n    this.sourceName = sourceName;\n    this.targetName = targetName;\n    this.comObj = comObj;\n    this.callbackId = 1;\n    this.streamId = 1;\n    this.postMessageTransfers = true;\n    this.streamSinks = Object.create(null);\n    this.streamControllers = Object.create(null);\n    this.callbackCapabilities = Object.create(null);\n    this.actionHandler = Object.create(null);\n\n    this._onComObjOnMessage = event => {\n      const data = event.data;\n      if (data.targetName !== this.sourceName) {\n        return;\n      }\n      if (data.stream) {\n        this._processStreamMessage(data);\n        return;\n      }\n      if (data.callback) {\n        const callbackId = data.callbackId;\n        const capability = this.callbackCapabilities[callbackId];\n        if (!capability) {\n          throw new Error(`Cannot resolve callback ${callbackId}`);\n        }\n        delete this.callbackCapabilities[callbackId];\n\n        if (data.callback === CallbackKind.DATA) {\n          capability.resolve(data.data);\n        } else if (data.callback === CallbackKind.ERROR) {\n          capability.reject(wrapReason(data.reason));\n        } else {\n          throw new Error(\"Unexpected callback case\");\n        }\n        return;\n      }\n      const action = this.actionHandler[data.action];\n      if (!action) {\n        throw new Error(`Unknown action from worker: ${data.action}`);\n      }\n      if (data.callbackId) {\n        const cbSourceName = this.sourceName;\n        const cbTargetName = data.sourceName;\n        new Promise(function (resolve) {\n          resolve(action(data.data));\n        }).then(\n          function (result) {\n            comObj.postMessage({\n              sourceName: cbSourceName,\n              targetName: cbTargetName,\n              callback: CallbackKind.DATA,\n              callbackId: data.callbackId,\n              data: result,\n            });\n          },\n          function (reason) {\n            comObj.postMessage({\n              sourceName: cbSourceName,\n              targetName: cbTargetName,\n              callback: CallbackKind.ERROR,\n              callbackId: data.callbackId,\n              reason: wrapReason(reason),\n            });\n          }\n        );\n        return;\n      }\n      if (data.streamId) {\n        this._createStreamSink(data);\n        return;\n      }\n      action(data.data);\n    };\n    comObj.addEventListener(\"message\", this._onComObjOnMessage);\n  }\n\n  on(actionName, handler) {\n    if (\n      typeof PDFJSDev === \"undefined\" ||\n      PDFJSDev.test(\"!PRODUCTION || TESTING\")\n    ) {\n      assert(\n        typeof handler === \"function\",\n        'MessageHandler.on: Expected \"handler\" to be a function.'\n      );\n    }\n    const ah = this.actionHandler;\n    if (ah[actionName]) {\n      throw new Error(`There is already an actionName called \"${actionName}\"`);\n    }\n    ah[actionName] = handler;\n  }\n\n  /**\n   * Sends a message to the comObj to invoke the action with the supplied data.\n   * @param {string} actionName - Action to call.\n   * @param {JSON} data - JSON data to send.\n   * @param {Array} [transfers] - List of transfers/ArrayBuffers.\n   */\n  send(actionName, data, transfers) {\n    this._postMessage(\n      {\n        sourceName: this.sourceName,\n        targetName: this.targetName,\n        action: actionName,\n        data,\n      },\n      transfers\n    );\n  }\n\n  /**\n   * Sends a message to the comObj to invoke the action with the supplied data.\n   * Expects that the other side will callback with the response.\n   * @param {string} actionName - Action to call.\n   * @param {JSON} data - JSON data to send.\n   * @param {Array} [transfers] - List of transfers/ArrayBuffers.\n   * @returns {Promise} Promise to be resolved with response data.\n   */\n  sendWithPromise(actionName, data, transfers) {\n    const callbackId = this.callbackId++;\n    const capability = createPromiseCapability();\n    this.callbackCapabilities[callbackId] = capability;\n    try {\n      this._postMessage(\n        {\n          sourceName: this.sourceName,\n          targetName: this.targetName,\n          action: actionName,\n          callbackId,\n          data,\n        },\n        transfers\n      );\n    } catch (ex) {\n      capability.reject(ex);\n    }\n    return capability.promise;\n  }\n\n  /**\n   * Sends a message to the comObj to invoke the action with the supplied data.\n   * Expect that the other side will callback to signal 'start_complete'.\n   * @param {string} actionName - Action to call.\n   * @param {JSON} data - JSON data to send.\n   * @param {Object} queueingStrategy - Strategy to signal backpressure based on\n   *                 internal queue.\n   * @param {Array} [transfers] - List of transfers/ArrayBuffers.\n   * @returns {ReadableStream} ReadableStream to read data in chunks.\n   */\n  sendWithStream(actionName, data, queueingStrategy, transfers) {\n    const streamId = this.streamId++;\n    const sourceName = this.sourceName;\n    const targetName = this.targetName;\n    const comObj = this.comObj;\n\n    return new ReadableStream(\n      {\n        start: controller => {\n          const startCapability = createPromiseCapability();\n          this.streamControllers[streamId] = {\n            controller,\n            startCall: startCapability,\n            pullCall: null,\n            cancelCall: null,\n            isClosed: false,\n          };\n          this._postMessage(\n            {\n              sourceName,\n              targetName,\n              action: actionName,\n              streamId,\n              data,\n              desiredSize: controller.desiredSize,\n            },\n            transfers\n          );\n          // Return Promise for Async process, to signal success/failure.\n          return startCapability.promise;\n        },\n\n        pull: controller => {\n          const pullCapability = createPromiseCapability();\n          this.streamControllers[streamId].pullCall = pullCapability;\n          comObj.postMessage({\n            sourceName,\n            targetName,\n            stream: StreamKind.PULL,\n            streamId,\n            desiredSize: controller.desiredSize,\n          });\n          // Returning Promise will not call \"pull\"\n          // again until current pull is resolved.\n          return pullCapability.promise;\n        },\n\n        cancel: reason => {\n          assert(reason instanceof Error, \"cancel must have a valid reason\");\n          const cancelCapability = createPromiseCapability();\n          this.streamControllers[streamId].cancelCall = cancelCapability;\n          this.streamControllers[streamId].isClosed = true;\n          comObj.postMessage({\n            sourceName,\n            targetName,\n            stream: StreamKind.CANCEL,\n            streamId,\n            reason: wrapReason(reason),\n          });\n          // Return Promise to signal success or failure.\n          return cancelCapability.promise;\n        },\n      },\n      queueingStrategy\n    );\n  }\n\n  /**\n   * @private\n   */\n  _createStreamSink(data) {\n    const self = this;\n    const action = this.actionHandler[data.action];\n    const streamId = data.streamId;\n    const sourceName = this.sourceName;\n    const targetName = data.sourceName;\n    const comObj = this.comObj;\n\n    const streamSink = {\n      enqueue(chunk, size = 1, transfers) {\n        if (this.isCancelled) {\n          return;\n        }\n        const lastDesiredSize = this.desiredSize;\n        this.desiredSize -= size;\n        // Enqueue decreases the desiredSize property of sink,\n        // so when it changes from positive to negative,\n        // set ready as unresolved promise.\n        if (lastDesiredSize > 0 && this.desiredSize <= 0) {\n          this.sinkCapability = createPromiseCapability();\n          this.ready = this.sinkCapability.promise;\n        }\n        self._postMessage(\n          {\n            sourceName,\n            targetName,\n            stream: StreamKind.ENQUEUE,\n            streamId,\n            chunk,\n          },\n          transfers\n        );\n      },\n\n      close() {\n        if (this.isCancelled) {\n          return;\n        }\n        this.isCancelled = true;\n        comObj.postMessage({\n          sourceName,\n          targetName,\n          stream: StreamKind.CLOSE,\n          streamId,\n        });\n        delete self.streamSinks[streamId];\n      },\n\n      error(reason) {\n        assert(reason instanceof Error, \"error must have a valid reason\");\n        if (this.isCancelled) {\n          return;\n        }\n        this.isCancelled = true;\n        comObj.postMessage({\n          sourceName,\n          targetName,\n          stream: StreamKind.ERROR,\n          streamId,\n          reason: wrapReason(reason),\n        });\n      },\n\n      sinkCapability: createPromiseCapability(),\n      onPull: null,\n      onCancel: null,\n      isCancelled: false,\n      desiredSize: data.desiredSize,\n      ready: null,\n    };\n\n    streamSink.sinkCapability.resolve();\n    streamSink.ready = streamSink.sinkCapability.promise;\n    this.streamSinks[streamId] = streamSink;\n    new Promise(function (resolve) {\n      resolve(action(data.data, streamSink));\n    }).then(\n      function () {\n        comObj.postMessage({\n          sourceName,\n          targetName,\n          stream: StreamKind.START_COMPLETE,\n          streamId,\n          success: true,\n        });\n      },\n      function (reason) {\n        comObj.postMessage({\n          sourceName,\n          targetName,\n          stream: StreamKind.START_COMPLETE,\n          streamId,\n          reason: wrapReason(reason),\n        });\n      }\n    );\n  }\n\n  /**\n   * @private\n   */\n  _processStreamMessage(data) {\n    const streamId = data.streamId;\n    const sourceName = this.sourceName;\n    const targetName = data.sourceName;\n    const comObj = this.comObj;\n\n    switch (data.stream) {\n      case StreamKind.START_COMPLETE:\n        if (data.success) {\n          this.streamControllers[streamId].startCall.resolve();\n        } else {\n          this.streamControllers[streamId].startCall.reject(\n            wrapReason(data.reason)\n          );\n        }\n        break;\n      case StreamKind.PULL_COMPLETE:\n        if (data.success) {\n          this.streamControllers[streamId].pullCall.resolve();\n        } else {\n          this.streamControllers[streamId].pullCall.reject(\n            wrapReason(data.reason)\n          );\n        }\n        break;\n      case StreamKind.PULL:\n        // Ignore any pull after close is called.\n        if (!this.streamSinks[streamId]) {\n          comObj.postMessage({\n            sourceName,\n            targetName,\n            stream: StreamKind.PULL_COMPLETE,\n            streamId,\n            success: true,\n          });\n          break;\n        }\n        // Pull increases the desiredSize property of sink,\n        // so when it changes from negative to positive,\n        // set ready property as resolved promise.\n        if (\n          this.streamSinks[streamId].desiredSize <= 0 &&\n          data.desiredSize > 0\n        ) {\n          this.streamSinks[streamId].sinkCapability.resolve();\n        }\n        // Reset desiredSize property of sink on every pull.\n        this.streamSinks[streamId].desiredSize = data.desiredSize;\n        const { onPull } = this.streamSinks[data.streamId];\n        new Promise(function (resolve) {\n          resolve(onPull && onPull());\n        }).then(\n          function () {\n            comObj.postMessage({\n              sourceName,\n              targetName,\n              stream: StreamKind.PULL_COMPLETE,\n              streamId,\n              success: true,\n            });\n          },\n          function (reason) {\n            comObj.postMessage({\n              sourceName,\n              targetName,\n              stream: StreamKind.PULL_COMPLETE,\n              streamId,\n              reason: wrapReason(reason),\n            });\n          }\n        );\n        break;\n      case StreamKind.ENQUEUE:\n        assert(\n          this.streamControllers[streamId],\n          \"enqueue should have stream controller\"\n        );\n        if (this.streamControllers[streamId].isClosed) {\n          break;\n        }\n        this.streamControllers[streamId].controller.enqueue(data.chunk);\n        break;\n      case StreamKind.CLOSE:\n        assert(\n          this.streamControllers[streamId],\n          \"close should have stream controller\"\n        );\n        if (this.streamControllers[streamId].isClosed) {\n          break;\n        }\n        this.streamControllers[streamId].isClosed = true;\n        this.streamControllers[streamId].controller.close();\n        this._deleteStreamController(streamId);\n        break;\n      case StreamKind.ERROR:\n        assert(\n          this.streamControllers[streamId],\n          \"error should have stream controller\"\n        );\n        this.streamControllers[streamId].controller.error(\n          wrapReason(data.reason)\n        );\n        this._deleteStreamController(streamId);\n        break;\n      case StreamKind.CANCEL_COMPLETE:\n        if (data.success) {\n          this.streamControllers[streamId].cancelCall.resolve();\n        } else {\n          this.streamControllers[streamId].cancelCall.reject(\n            wrapReason(data.reason)\n          );\n        }\n        this._deleteStreamController(streamId);\n        break;\n      case StreamKind.CANCEL:\n        if (!this.streamSinks[streamId]) {\n          break;\n        }\n        const { onCancel } = this.streamSinks[data.streamId];\n        new Promise(function (resolve) {\n          resolve(onCancel && onCancel(wrapReason(data.reason)));\n        }).then(\n          function () {\n            comObj.postMessage({\n              sourceName,\n              targetName,\n              stream: StreamKind.CANCEL_COMPLETE,\n              streamId,\n              success: true,\n            });\n          },\n          function (reason) {\n            comObj.postMessage({\n              sourceName,\n              targetName,\n              stream: StreamKind.CANCEL_COMPLETE,\n              streamId,\n              reason: wrapReason(reason),\n            });\n          }\n        );\n        this.streamSinks[streamId].sinkCapability.reject(\n          wrapReason(data.reason)\n        );\n        this.streamSinks[streamId].isCancelled = true;\n        delete this.streamSinks[streamId];\n        break;\n      default:\n        throw new Error(\"Unexpected stream case\");\n    }\n  }\n\n  /**\n   * @private\n   */\n  async _deleteStreamController(streamId) {\n    // Delete the `streamController` only when the start, pull, and cancel\n    // capabilities have settled, to prevent `TypeError`s.\n    await Promise.allSettled(\n      [\n        this.streamControllers[streamId].startCall,\n        this.streamControllers[streamId].pullCall,\n        this.streamControllers[streamId].cancelCall,\n      ].map(function (capability) {\n        return capability && capability.promise;\n      })\n    );\n    delete this.streamControllers[streamId];\n  }\n\n  /**\n   * Sends raw message to the comObj.\n   * @param {Object} message - Raw message.\n   * @param transfers List of transfers/ArrayBuffers, or undefined.\n   * @private\n   */\n  _postMessage(message, transfers) {\n    if (transfers && this.postMessageTransfers) {\n      this.comObj.postMessage(message, transfers);\n    } else {\n      this.comObj.postMessage(message);\n    }\n  }\n\n  destroy() {\n    this.comObj.removeEventListener(\"message\", this._onComObjOnMessage);\n  }\n}\n\nexport { MessageHandler };\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { assert } from \"../shared/util.js\";\nimport { SimpleXMLParser } from \"./xml_parser.js\";\n\nclass Metadata {\n  constructor(data) {\n    assert(typeof data === \"string\", \"Metadata: input is not a string\");\n\n    // Ghostscript may produce invalid metadata, so try to repair that first.\n    data = this._repair(data);\n\n    // Convert the string to an XML document.\n    const parser = new SimpleXMLParser();\n    const xmlDocument = parser.parseFromString(data);\n\n    this._metadataMap = new Map();\n\n    if (xmlDocument) {\n      this._parse(xmlDocument);\n    }\n  }\n\n  _repair(data) {\n    // Start by removing any \"junk\" before the first tag (see issue 10395).\n    return data\n      .replace(/^[^<]+/, \"\")\n      .replace(/>\\\\376\\\\377([^<]+)/g, function (all, codes) {\n        const bytes = codes\n          .replace(/\\\\([0-3])([0-7])([0-7])/g, function (code, d1, d2, d3) {\n            return String.fromCharCode(d1 * 64 + d2 * 8 + d3 * 1);\n          })\n          .replace(/&(amp|apos|gt|lt|quot);/g, function (str, name) {\n            switch (name) {\n              case \"amp\":\n                return \"&\";\n              case \"apos\":\n                return \"'\";\n              case \"gt\":\n                return \">\";\n              case \"lt\":\n                return \"<\";\n              case \"quot\":\n                return '\"';\n            }\n            throw new Error(`_repair: ${name} isn't defined.`);\n          });\n\n        let chars = \"\";\n        for (let i = 0, ii = bytes.length; i < ii; i += 2) {\n          const code = bytes.charCodeAt(i) * 256 + bytes.charCodeAt(i + 1);\n          if (\n            code >= /* Space = */ 32 &&\n            code < /* Delete = */ 127 &&\n            code !== /* '<' = */ 60 &&\n            code !== /* '>' = */ 62 &&\n            code !== /* '&' = */ 38\n          ) {\n            chars += String.fromCharCode(code);\n          } else {\n            chars += \"&#x\" + (0x10000 + code).toString(16).substring(1) + \";\";\n          }\n        }\n\n        return \">\" + chars;\n      });\n  }\n\n  _parse(xmlDocument) {\n    let rdf = xmlDocument.documentElement;\n\n    if (rdf.nodeName.toLowerCase() !== \"rdf:rdf\") {\n      // Wrapped in <xmpmeta>\n      rdf = rdf.firstChild;\n      while (rdf && rdf.nodeName.toLowerCase() !== \"rdf:rdf\") {\n        rdf = rdf.nextSibling;\n      }\n    }\n\n    const nodeName = rdf ? rdf.nodeName.toLowerCase() : null;\n    if (!rdf || nodeName !== \"rdf:rdf\" || !rdf.hasChildNodes()) {\n      return;\n    }\n\n    const children = rdf.childNodes;\n    for (let i = 0, ii = children.length; i < ii; i++) {\n      const desc = children[i];\n      if (desc.nodeName.toLowerCase() !== \"rdf:description\") {\n        continue;\n      }\n\n      for (let j = 0, jj = desc.childNodes.length; j < jj; j++) {\n        if (desc.childNodes[j].nodeName.toLowerCase() !== \"#text\") {\n          const entry = desc.childNodes[j];\n          const name = entry.nodeName.toLowerCase();\n\n          this._metadataMap.set(name, entry.textContent.trim());\n        }\n      }\n    }\n  }\n\n  get(name) {\n    return this._metadataMap.has(name) ? this._metadataMap.get(name) : null;\n  }\n\n  getAll() {\n    const obj = Object.create(null);\n    for (const [key, value] of this._metadataMap) {\n      obj[key] = value;\n    }\n    return obj;\n  }\n\n  has(name) {\n    return this._metadataMap.has(name);\n  }\n}\n\nexport { Metadata };\n","/* Copyright 2018 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n// The code for XMLParserBase copied from\n// https://github.com/mozilla/shumway/blob/16451d8836fa85f4b16eeda8b4bda2fa9e2b22b0/src/avm2/natives/xml.ts\n\nconst XMLParserErrorCode = {\n  NoError: 0,\n  EndOfDocument: -1,\n  UnterminatedCdat: -2,\n  UnterminatedXmlDeclaration: -3,\n  UnterminatedDoctypeDeclaration: -4,\n  UnterminatedComment: -5,\n  MalformedElement: -6,\n  OutOfMemory: -7,\n  UnterminatedAttributeValue: -8,\n  UnterminatedElement: -9,\n  ElementNeverBegun: -10,\n};\n\nfunction isWhitespace(s, index) {\n  const ch = s[index];\n  return ch === \" \" || ch === \"\\n\" || ch === \"\\r\" || ch === \"\\t\";\n}\n\nfunction isWhitespaceString(s) {\n  for (let i = 0, ii = s.length; i < ii; i++) {\n    if (!isWhitespace(s, i)) {\n      return false;\n    }\n  }\n  return true;\n}\n\nclass XMLParserBase {\n  _resolveEntities(s) {\n    return s.replace(/&([^;]+);/g, (all, entity) => {\n      if (entity.substring(0, 2) === \"#x\") {\n        return String.fromCharCode(parseInt(entity.substring(2), 16));\n      } else if (entity.substring(0, 1) === \"#\") {\n        return String.fromCharCode(parseInt(entity.substring(1), 10));\n      }\n      switch (entity) {\n        case \"lt\":\n          return \"<\";\n        case \"gt\":\n          return \">\";\n        case \"amp\":\n          return \"&\";\n        case \"quot\":\n          return '\"';\n      }\n      return this.onResolveEntity(entity);\n    });\n  }\n\n  _parseContent(s, start) {\n    const attributes = [];\n    let pos = start;\n\n    function skipWs() {\n      while (pos < s.length && isWhitespace(s, pos)) {\n        ++pos;\n      }\n    }\n\n    while (\n      pos < s.length &&\n      !isWhitespace(s, pos) &&\n      s[pos] !== \">\" &&\n      s[pos] !== \"/\"\n    ) {\n      ++pos;\n    }\n    const name = s.substring(start, pos);\n    skipWs();\n    while (\n      pos < s.length &&\n      s[pos] !== \">\" &&\n      s[pos] !== \"/\" &&\n      s[pos] !== \"?\"\n    ) {\n      skipWs();\n      let attrName = \"\",\n        attrValue = \"\";\n      while (pos < s.length && !isWhitespace(s, pos) && s[pos] !== \"=\") {\n        attrName += s[pos];\n        ++pos;\n      }\n      skipWs();\n      if (s[pos] !== \"=\") {\n        return null;\n      }\n      ++pos;\n      skipWs();\n      const attrEndChar = s[pos];\n      if (attrEndChar !== '\"' && attrEndChar !== \"'\") {\n        return null;\n      }\n      const attrEndIndex = s.indexOf(attrEndChar, ++pos);\n      if (attrEndIndex < 0) {\n        return null;\n      }\n      attrValue = s.substring(pos, attrEndIndex);\n      attributes.push({\n        name: attrName,\n        value: this._resolveEntities(attrValue),\n      });\n      pos = attrEndIndex + 1;\n      skipWs();\n    }\n    return {\n      name,\n      attributes,\n      parsed: pos - start,\n    };\n  }\n\n  _parseProcessingInstruction(s, start) {\n    let pos = start;\n\n    function skipWs() {\n      while (pos < s.length && isWhitespace(s, pos)) {\n        ++pos;\n      }\n    }\n\n    while (\n      pos < s.length &&\n      !isWhitespace(s, pos) &&\n      s[pos] !== \">\" &&\n      s[pos] !== \"/\"\n    ) {\n      ++pos;\n    }\n    const name = s.substring(start, pos);\n    skipWs();\n    const attrStart = pos;\n    while (pos < s.length && (s[pos] !== \"?\" || s[pos + 1] !== \">\")) {\n      ++pos;\n    }\n    const value = s.substring(attrStart, pos);\n    return {\n      name,\n      value,\n      parsed: pos - start,\n    };\n  }\n\n  parseXml(s) {\n    let i = 0;\n    while (i < s.length) {\n      const ch = s[i];\n      let j = i;\n      if (ch === \"<\") {\n        ++j;\n        const ch2 = s[j];\n        let q;\n        switch (ch2) {\n          case \"/\":\n            ++j;\n            q = s.indexOf(\">\", j);\n            if (q < 0) {\n              this.onError(XMLParserErrorCode.UnterminatedElement);\n              return;\n            }\n            this.onEndElement(s.substring(j, q));\n            j = q + 1;\n            break;\n          case \"?\":\n            ++j;\n            const pi = this._parseProcessingInstruction(s, j);\n            if (s.substring(j + pi.parsed, j + pi.parsed + 2) !== \"?>\") {\n              this.onError(XMLParserErrorCode.UnterminatedXmlDeclaration);\n              return;\n            }\n            this.onPi(pi.name, pi.value);\n            j += pi.parsed + 2;\n            break;\n          case \"!\":\n            if (s.substring(j + 1, j + 3) === \"--\") {\n              q = s.indexOf(\"-->\", j + 3);\n              if (q < 0) {\n                this.onError(XMLParserErrorCode.UnterminatedComment);\n                return;\n              }\n              this.onComment(s.substring(j + 3, q));\n              j = q + 3;\n            } else if (s.substring(j + 1, j + 8) === \"[CDATA[\") {\n              q = s.indexOf(\"]]>\", j + 8);\n              if (q < 0) {\n                this.onError(XMLParserErrorCode.UnterminatedCdat);\n                return;\n              }\n              this.onCdata(s.substring(j + 8, q));\n              j = q + 3;\n            } else if (s.substring(j + 1, j + 8) === \"DOCTYPE\") {\n              const q2 = s.indexOf(\"[\", j + 8);\n              let complexDoctype = false;\n              q = s.indexOf(\">\", j + 8);\n              if (q < 0) {\n                this.onError(XMLParserErrorCode.UnterminatedDoctypeDeclaration);\n                return;\n              }\n              if (q2 > 0 && q > q2) {\n                q = s.indexOf(\"]>\", j + 8);\n                if (q < 0) {\n                  this.onError(\n                    XMLParserErrorCode.UnterminatedDoctypeDeclaration\n                  );\n                  return;\n                }\n                complexDoctype = true;\n              }\n              const doctypeContent = s.substring(\n                j + 8,\n                q + (complexDoctype ? 1 : 0)\n              );\n              this.onDoctype(doctypeContent);\n              j = q + (complexDoctype ? 2 : 1);\n            } else {\n              this.onError(XMLParserErrorCode.MalformedElement);\n              return;\n            }\n            break;\n          default:\n            const content = this._parseContent(s, j);\n            if (content === null) {\n              this.onError(XMLParserErrorCode.MalformedElement);\n              return;\n            }\n            let isClosed = false;\n            if (\n              s.substring(j + content.parsed, j + content.parsed + 2) === \"/>\"\n            ) {\n              isClosed = true;\n            } else if (\n              s.substring(j + content.parsed, j + content.parsed + 1) !== \">\"\n            ) {\n              this.onError(XMLParserErrorCode.UnterminatedElement);\n              return;\n            }\n            this.onBeginElement(content.name, content.attributes, isClosed);\n            j += content.parsed + (isClosed ? 2 : 1);\n            break;\n        }\n      } else {\n        while (j < s.length && s[j] !== \"<\") {\n          j++;\n        }\n        const text = s.substring(i, j);\n        this.onText(this._resolveEntities(text));\n      }\n      i = j;\n    }\n  }\n\n  onResolveEntity(name) {\n    return `&${name};`;\n  }\n\n  onPi(name, value) {}\n\n  onComment(text) {}\n\n  onCdata(text) {}\n\n  onDoctype(doctypeContent) {}\n\n  onText(text) {}\n\n  onBeginElement(name, attributes, isEmpty) {}\n\n  onEndElement(name) {}\n\n  onError(code) {}\n}\n\nclass SimpleDOMNode {\n  constructor(nodeName, nodeValue) {\n    this.nodeName = nodeName;\n    this.nodeValue = nodeValue;\n\n    Object.defineProperty(this, \"parentNode\", { value: null, writable: true });\n  }\n\n  get firstChild() {\n    return this.childNodes && this.childNodes[0];\n  }\n\n  get nextSibling() {\n    const childNodes = this.parentNode.childNodes;\n    if (!childNodes) {\n      return undefined;\n    }\n    const index = childNodes.indexOf(this);\n    if (index === -1) {\n      return undefined;\n    }\n    return childNodes[index + 1];\n  }\n\n  get textContent() {\n    if (!this.childNodes) {\n      return this.nodeValue || \"\";\n    }\n    return this.childNodes\n      .map(function (child) {\n        return child.textContent;\n      })\n      .join(\"\");\n  }\n\n  hasChildNodes() {\n    return this.childNodes && this.childNodes.length > 0;\n  }\n}\n\nclass SimpleXMLParser extends XMLParserBase {\n  constructor() {\n    super();\n    this._currentFragment = null;\n    this._stack = null;\n    this._errorCode = XMLParserErrorCode.NoError;\n  }\n\n  parseFromString(data) {\n    this._currentFragment = [];\n    this._stack = [];\n    this._errorCode = XMLParserErrorCode.NoError;\n\n    this.parseXml(data);\n\n    if (this._errorCode !== XMLParserErrorCode.NoError) {\n      return undefined; // return undefined on error\n    }\n\n    // We should only have one root.\n    const [documentElement] = this._currentFragment;\n    if (!documentElement) {\n      return undefined; // Return undefined if no root was found.\n    }\n    return { documentElement };\n  }\n\n  onResolveEntity(name) {\n    switch (name) {\n      case \"apos\":\n        return \"'\";\n    }\n    return super.onResolveEntity(name);\n  }\n\n  onText(text) {\n    if (isWhitespaceString(text)) {\n      return;\n    }\n    const node = new SimpleDOMNode(\"#text\", text);\n    this._currentFragment.push(node);\n  }\n\n  onCdata(text) {\n    const node = new SimpleDOMNode(\"#text\", text);\n    this._currentFragment.push(node);\n  }\n\n  onBeginElement(name, attributes, isEmpty) {\n    const node = new SimpleDOMNode(name);\n    node.childNodes = [];\n    this._currentFragment.push(node);\n    if (isEmpty) {\n      return;\n    }\n    this._stack.push(this._currentFragment);\n    this._currentFragment = node.childNodes;\n  }\n\n  onEndElement(name) {\n    this._currentFragment = this._stack.pop() || [];\n    const lastElement = this._currentFragment[this._currentFragment.length - 1];\n    if (!lastElement) {\n      return;\n    }\n    for (let i = 0, ii = lastElement.childNodes.length; i < ii; i++) {\n      lastElement.childNodes[i].parentNode = lastElement;\n    }\n  }\n\n  onError(code) {\n    this._errorCode = code;\n  }\n}\n\nexport { SimpleXMLParser };\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* eslint no-var: error */\n\nimport { assert, createPromiseCapability } from \"../shared/util.js\";\n\n/** @implements {IPDFStream} */\nclass PDFDataTransportStream {\n  constructor(params, pdfDataRangeTransport) {\n    assert(\n      pdfDataRangeTransport,\n      'PDFDataTransportStream - missing required \"pdfDataRangeTransport\" argument.'\n    );\n\n    this._queuedChunks = [];\n    this._progressiveDone = params.progressiveDone || false;\n\n    const initialData = params.initialData;\n    if (initialData && initialData.length > 0) {\n      const buffer = new Uint8Array(initialData).buffer;\n      this._queuedChunks.push(buffer);\n    }\n\n    this._pdfDataRangeTransport = pdfDataRangeTransport;\n    this._isStreamingSupported = !params.disableStream;\n    this._isRangeSupported = !params.disableRange;\n    this._contentLength = params.length;\n\n    this._fullRequestReader = null;\n    this._rangeReaders = [];\n\n    this._pdfDataRangeTransport.addRangeListener((begin, chunk) => {\n      this._onReceiveData({ begin, chunk });\n    });\n\n    this._pdfDataRangeTransport.addProgressListener((loaded, total) => {\n      this._onProgress({ loaded, total });\n    });\n\n    this._pdfDataRangeTransport.addProgressiveReadListener(chunk => {\n      this._onReceiveData({ chunk });\n    });\n\n    this._pdfDataRangeTransport.addProgressiveDoneListener(() => {\n      this._onProgressiveDone();\n    });\n\n    this._pdfDataRangeTransport.transportReady();\n  }\n\n  _onReceiveData(args) {\n    const buffer = new Uint8Array(args.chunk).buffer;\n    if (args.begin === undefined) {\n      if (this._fullRequestReader) {\n        this._fullRequestReader._enqueue(buffer);\n      } else {\n        this._queuedChunks.push(buffer);\n      }\n    } else {\n      const found = this._rangeReaders.some(function (rangeReader) {\n        if (rangeReader._begin !== args.begin) {\n          return false;\n        }\n        rangeReader._enqueue(buffer);\n        return true;\n      });\n      assert(\n        found,\n        \"_onReceiveData - no `PDFDataTransportStreamRangeReader` instance found.\"\n      );\n    }\n  }\n\n  get _progressiveDataLength() {\n    return this._fullRequestReader ? this._fullRequestReader._loaded : 0;\n  }\n\n  _onProgress(evt) {\n    if (evt.total === undefined) {\n      // Reporting to first range reader, if it exists.\n      const firstReader = this._rangeReaders[0];\n      if (firstReader && firstReader.onProgress) {\n        firstReader.onProgress({ loaded: evt.loaded });\n      }\n    } else {\n      const fullReader = this._fullRequestReader;\n      if (fullReader && fullReader.onProgress) {\n        fullReader.onProgress({ loaded: evt.loaded, total: evt.total });\n      }\n    }\n  }\n\n  _onProgressiveDone() {\n    if (this._fullRequestReader) {\n      this._fullRequestReader.progressiveDone();\n    }\n    this._progressiveDone = true;\n  }\n\n  _removeRangeReader(reader) {\n    const i = this._rangeReaders.indexOf(reader);\n    if (i >= 0) {\n      this._rangeReaders.splice(i, 1);\n    }\n  }\n\n  getFullReader() {\n    assert(\n      !this._fullRequestReader,\n      \"PDFDataTransportStream.getFullReader can only be called once.\"\n    );\n    const queuedChunks = this._queuedChunks;\n    this._queuedChunks = null;\n    return new PDFDataTransportStreamReader(\n      this,\n      queuedChunks,\n      this._progressiveDone\n    );\n  }\n\n  getRangeReader(begin, end) {\n    if (end <= this._progressiveDataLength) {\n      return null;\n    }\n    const reader = new PDFDataTransportStreamRangeReader(this, begin, end);\n    this._pdfDataRangeTransport.requestDataRange(begin, end);\n    this._rangeReaders.push(reader);\n    return reader;\n  }\n\n  cancelAllRequests(reason) {\n    if (this._fullRequestReader) {\n      this._fullRequestReader.cancel(reason);\n    }\n    const readers = this._rangeReaders.slice(0);\n    readers.forEach(function (rangeReader) {\n      rangeReader.cancel(reason);\n    });\n    this._pdfDataRangeTransport.abort();\n  }\n}\n\n/** @implements {IPDFStreamReader} */\nclass PDFDataTransportStreamReader {\n  constructor(stream, queuedChunks, progressiveDone = false) {\n    this._stream = stream;\n    this._done = progressiveDone || false;\n    this._filename = null;\n    this._queuedChunks = queuedChunks || [];\n    this._loaded = 0;\n    for (const chunk of this._queuedChunks) {\n      this._loaded += chunk.byteLength;\n    }\n    this._requests = [];\n    this._headersReady = Promise.resolve();\n    stream._fullRequestReader = this;\n\n    this.onProgress = null;\n  }\n\n  _enqueue(chunk) {\n    if (this._done) {\n      return; // Ignore new data.\n    }\n    if (this._requests.length > 0) {\n      const requestCapability = this._requests.shift();\n      requestCapability.resolve({ value: chunk, done: false });\n    } else {\n      this._queuedChunks.push(chunk);\n    }\n    this._loaded += chunk.byteLength;\n  }\n\n  get headersReady() {\n    return this._headersReady;\n  }\n\n  get filename() {\n    return this._filename;\n  }\n\n  get isRangeSupported() {\n    return this._stream._isRangeSupported;\n  }\n\n  get isStreamingSupported() {\n    return this._stream._isStreamingSupported;\n  }\n\n  get contentLength() {\n    return this._stream._contentLength;\n  }\n\n  async read() {\n    if (this._queuedChunks.length > 0) {\n      const chunk = this._queuedChunks.shift();\n      return { value: chunk, done: false };\n    }\n    if (this._done) {\n      return { value: undefined, done: true };\n    }\n    const requestCapability = createPromiseCapability();\n    this._requests.push(requestCapability);\n    return requestCapability.promise;\n  }\n\n  cancel(reason) {\n    this._done = true;\n    this._requests.forEach(function (requestCapability) {\n      requestCapability.resolve({ value: undefined, done: true });\n    });\n    this._requests = [];\n  }\n\n  progressiveDone() {\n    if (this._done) {\n      return;\n    }\n    this._done = true;\n  }\n}\n\n/** @implements {IPDFStreamRangeReader} */\nclass PDFDataTransportStreamRangeReader {\n  constructor(stream, begin, end) {\n    this._stream = stream;\n    this._begin = begin;\n    this._end = end;\n    this._queuedChunk = null;\n    this._requests = [];\n    this._done = false;\n\n    this.onProgress = null;\n  }\n\n  _enqueue(chunk) {\n    if (this._done) {\n      return; // ignore new data\n    }\n    if (this._requests.length === 0) {\n      this._queuedChunk = chunk;\n    } else {\n      const requestsCapability = this._requests.shift();\n      requestsCapability.resolve({ value: chunk, done: false });\n      this._requests.forEach(function (requestCapability) {\n        requestCapability.resolve({ value: undefined, done: true });\n      });\n      this._requests = [];\n    }\n    this._done = true;\n    this._stream._removeRangeReader(this);\n  }\n\n  get isStreamingSupported() {\n    return false;\n  }\n\n  async read() {\n    if (this._queuedChunk) {\n      const chunk = this._queuedChunk;\n      this._queuedChunk = null;\n      return { value: chunk, done: false };\n    }\n    if (this._done) {\n      return { value: undefined, done: true };\n    }\n    const requestCapability = createPromiseCapability();\n    this._requests.push(requestCapability);\n    return requestCapability.promise;\n  }\n\n  cancel(reason) {\n    this._done = true;\n    this._requests.forEach(function (requestCapability) {\n      requestCapability.resolve({ value: undefined, done: true });\n    });\n    this._requests = [];\n    this._stream._removeRangeReader(this);\n  }\n}\n\nexport { PDFDataTransportStream };\n","/* Copyright 2014 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* eslint-disable no-multi-str */\n\nimport { shadow } from \"../shared/util.js\";\n\nclass WebGLContext {\n  constructor({ enable = false }) {\n    this._enabled = enable === true;\n  }\n\n  get isEnabled() {\n    let enabled = this._enabled;\n    if (enabled) {\n      enabled = WebGLUtils.tryInitGL();\n    }\n    return shadow(this, \"isEnabled\", enabled);\n  }\n\n  composeSMask({ layer, mask, properties }) {\n    return WebGLUtils.composeSMask(layer, mask, properties);\n  }\n\n  drawFigures({ width, height, backgroundColor, figures, context }) {\n    return WebGLUtils.drawFigures(\n      width,\n      height,\n      backgroundColor,\n      figures,\n      context\n    );\n  }\n\n  clear() {\n    WebGLUtils.cleanup();\n  }\n}\n\nvar WebGLUtils = (function WebGLUtilsClosure() {\n  function loadShader(gl, code, shaderType) {\n    var shader = gl.createShader(shaderType);\n    gl.shaderSource(shader, code);\n    gl.compileShader(shader);\n    var compiled = gl.getShaderParameter(shader, gl.COMPILE_STATUS);\n    if (!compiled) {\n      var errorMsg = gl.getShaderInfoLog(shader);\n      throw new Error(\"Error during shader compilation: \" + errorMsg);\n    }\n    return shader;\n  }\n  function createVertexShader(gl, code) {\n    return loadShader(gl, code, gl.VERTEX_SHADER);\n  }\n  function createFragmentShader(gl, code) {\n    return loadShader(gl, code, gl.FRAGMENT_SHADER);\n  }\n  function createProgram(gl, shaders) {\n    var program = gl.createProgram();\n    for (var i = 0, ii = shaders.length; i < ii; ++i) {\n      gl.attachShader(program, shaders[i]);\n    }\n    gl.linkProgram(program);\n    var linked = gl.getProgramParameter(program, gl.LINK_STATUS);\n    if (!linked) {\n      var errorMsg = gl.getProgramInfoLog(program);\n      throw new Error(\"Error during program linking: \" + errorMsg);\n    }\n    return program;\n  }\n  function createTexture(gl, image, textureId) {\n    gl.activeTexture(textureId);\n    var texture = gl.createTexture();\n    gl.bindTexture(gl.TEXTURE_2D, texture);\n\n    // Set the parameters so we can render any size image.\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);\n\n    // Upload the image into the texture.\n    gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image);\n    return texture;\n  }\n\n  var currentGL, currentCanvas;\n  function generateGL() {\n    if (currentGL) {\n      return;\n    }\n\n    // The temporary canvas is used in the WebGL context.\n    currentCanvas = document.createElement(\"canvas\");\n    currentGL = currentCanvas.getContext(\"webgl\", {\n      premultipliedalpha: false,\n    });\n  }\n\n  var smaskVertexShaderCode =\n    \"\\\n  attribute vec2 a_position;                                    \\\n  attribute vec2 a_texCoord;                                    \\\n                                                                \\\n  uniform vec2 u_resolution;                                    \\\n                                                                \\\n  varying vec2 v_texCoord;                                      \\\n                                                                \\\n  void main() {                                                 \\\n    vec2 clipSpace = (a_position / u_resolution) * 2.0 - 1.0;   \\\n    gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1);          \\\n                                                                \\\n    v_texCoord = a_texCoord;                                    \\\n  }                                                             \";\n\n  var smaskFragmentShaderCode =\n    \"\\\n  precision mediump float;                                      \\\n                                                                \\\n  uniform vec4 u_backdrop;                                      \\\n  uniform int u_subtype;                                        \\\n  uniform sampler2D u_image;                                    \\\n  uniform sampler2D u_mask;                                     \\\n                                                                \\\n  varying vec2 v_texCoord;                                      \\\n                                                                \\\n  void main() {                                                 \\\n    vec4 imageColor = texture2D(u_image, v_texCoord);           \\\n    vec4 maskColor = texture2D(u_mask, v_texCoord);             \\\n    if (u_backdrop.a > 0.0) {                                   \\\n      maskColor.rgb = maskColor.rgb * maskColor.a +             \\\n                      u_backdrop.rgb * (1.0 - maskColor.a);     \\\n    }                                                           \\\n    float lum;                                                  \\\n    if (u_subtype == 0) {                                       \\\n      lum = maskColor.a;                                        \\\n    } else {                                                    \\\n      lum = maskColor.r * 0.3 + maskColor.g * 0.59 +            \\\n            maskColor.b * 0.11;                                 \\\n    }                                                           \\\n    imageColor.a *= lum;                                        \\\n    imageColor.rgb *= imageColor.a;                             \\\n    gl_FragColor = imageColor;                                  \\\n  }                                                             \";\n\n  var smaskCache = null;\n\n  function initSmaskGL() {\n    var canvas, gl;\n\n    generateGL();\n    canvas = currentCanvas;\n    currentCanvas = null;\n    gl = currentGL;\n    currentGL = null;\n\n    // setup a GLSL program\n    var vertexShader = createVertexShader(gl, smaskVertexShaderCode);\n    var fragmentShader = createFragmentShader(gl, smaskFragmentShaderCode);\n    var program = createProgram(gl, [vertexShader, fragmentShader]);\n    gl.useProgram(program);\n\n    var cache = {};\n    cache.gl = gl;\n    cache.canvas = canvas;\n    cache.resolutionLocation = gl.getUniformLocation(program, \"u_resolution\");\n    cache.positionLocation = gl.getAttribLocation(program, \"a_position\");\n    cache.backdropLocation = gl.getUniformLocation(program, \"u_backdrop\");\n    cache.subtypeLocation = gl.getUniformLocation(program, \"u_subtype\");\n\n    var texCoordLocation = gl.getAttribLocation(program, \"a_texCoord\");\n    var texLayerLocation = gl.getUniformLocation(program, \"u_image\");\n    var texMaskLocation = gl.getUniformLocation(program, \"u_mask\");\n\n    // provide texture coordinates for the rectangle.\n    var texCoordBuffer = gl.createBuffer();\n    gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer);\n    // prettier-ignore\n    gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([\n      0.0, 0.0,\n      1.0, 0.0,\n      0.0, 1.0,\n      0.0, 1.0,\n      1.0, 0.0,\n      1.0, 1.0]), gl.STATIC_DRAW);\n    gl.enableVertexAttribArray(texCoordLocation);\n    gl.vertexAttribPointer(texCoordLocation, 2, gl.FLOAT, false, 0, 0);\n\n    gl.uniform1i(texLayerLocation, 0);\n    gl.uniform1i(texMaskLocation, 1);\n\n    smaskCache = cache;\n  }\n\n  function composeSMask(layer, mask, properties) {\n    var width = layer.width,\n      height = layer.height;\n\n    if (!smaskCache) {\n      initSmaskGL();\n    }\n    var cache = smaskCache,\n      canvas = cache.canvas,\n      gl = cache.gl;\n    canvas.width = width;\n    canvas.height = height;\n    gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);\n    gl.uniform2f(cache.resolutionLocation, width, height);\n\n    if (properties.backdrop) {\n      gl.uniform4f(\n        cache.resolutionLocation,\n        properties.backdrop[0],\n        properties.backdrop[1],\n        properties.backdrop[2],\n        1\n      );\n    } else {\n      gl.uniform4f(cache.resolutionLocation, 0, 0, 0, 0);\n    }\n    gl.uniform1i(\n      cache.subtypeLocation,\n      properties.subtype === \"Luminosity\" ? 1 : 0\n    );\n\n    // Create a textures\n    var texture = createTexture(gl, layer, gl.TEXTURE0);\n    var maskTexture = createTexture(gl, mask, gl.TEXTURE1);\n\n    // Create a buffer and put a single clipspace rectangle in\n    // it (2 triangles)\n    var buffer = gl.createBuffer();\n    gl.bindBuffer(gl.ARRAY_BUFFER, buffer);\n    // prettier-ignore\n    gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([\n      0, 0,\n      width, 0,\n      0, height,\n      0, height,\n      width, 0,\n      width, height]), gl.STATIC_DRAW);\n    gl.enableVertexAttribArray(cache.positionLocation);\n    gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0);\n\n    // draw\n    gl.clearColor(0, 0, 0, 0);\n    gl.enable(gl.BLEND);\n    gl.blendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA);\n    gl.clear(gl.COLOR_BUFFER_BIT);\n\n    gl.drawArrays(gl.TRIANGLES, 0, 6);\n\n    gl.flush();\n\n    gl.deleteTexture(texture);\n    gl.deleteTexture(maskTexture);\n    gl.deleteBuffer(buffer);\n\n    return canvas;\n  }\n\n  var figuresVertexShaderCode =\n    \"\\\n  attribute vec2 a_position;                                    \\\n  attribute vec3 a_color;                                       \\\n                                                                \\\n  uniform vec2 u_resolution;                                    \\\n  uniform vec2 u_scale;                                         \\\n  uniform vec2 u_offset;                                        \\\n                                                                \\\n  varying vec4 v_color;                                         \\\n                                                                \\\n  void main() {                                                 \\\n    vec2 position = (a_position + u_offset) * u_scale;          \\\n    vec2 clipSpace = (position / u_resolution) * 2.0 - 1.0;     \\\n    gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1);          \\\n                                                                \\\n    v_color = vec4(a_color / 255.0, 1.0);                       \\\n  }                                                             \";\n\n  var figuresFragmentShaderCode =\n    \"\\\n  precision mediump float;                                      \\\n                                                                \\\n  varying vec4 v_color;                                         \\\n                                                                \\\n  void main() {                                                 \\\n    gl_FragColor = v_color;                                     \\\n  }                                                             \";\n\n  var figuresCache = null;\n\n  function initFiguresGL() {\n    var canvas, gl;\n\n    generateGL();\n    canvas = currentCanvas;\n    currentCanvas = null;\n    gl = currentGL;\n    currentGL = null;\n\n    // setup a GLSL program\n    var vertexShader = createVertexShader(gl, figuresVertexShaderCode);\n    var fragmentShader = createFragmentShader(gl, figuresFragmentShaderCode);\n    var program = createProgram(gl, [vertexShader, fragmentShader]);\n    gl.useProgram(program);\n\n    var cache = {};\n    cache.gl = gl;\n    cache.canvas = canvas;\n    cache.resolutionLocation = gl.getUniformLocation(program, \"u_resolution\");\n    cache.scaleLocation = gl.getUniformLocation(program, \"u_scale\");\n    cache.offsetLocation = gl.getUniformLocation(program, \"u_offset\");\n    cache.positionLocation = gl.getAttribLocation(program, \"a_position\");\n    cache.colorLocation = gl.getAttribLocation(program, \"a_color\");\n\n    figuresCache = cache;\n  }\n\n  function drawFigures(width, height, backgroundColor, figures, context) {\n    if (!figuresCache) {\n      initFiguresGL();\n    }\n    var cache = figuresCache,\n      canvas = cache.canvas,\n      gl = cache.gl;\n\n    canvas.width = width;\n    canvas.height = height;\n    gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);\n    gl.uniform2f(cache.resolutionLocation, width, height);\n\n    // count triangle points\n    var count = 0;\n    var i, ii, rows;\n    for (i = 0, ii = figures.length; i < ii; i++) {\n      switch (figures[i].type) {\n        case \"lattice\":\n          rows = (figures[i].coords.length / figures[i].verticesPerRow) | 0;\n          count += (rows - 1) * (figures[i].verticesPerRow - 1) * 6;\n          break;\n        case \"triangles\":\n          count += figures[i].coords.length;\n          break;\n      }\n    }\n    // transfer data\n    var coords = new Float32Array(count * 2);\n    var colors = new Uint8Array(count * 3);\n    var coordsMap = context.coords,\n      colorsMap = context.colors;\n    var pIndex = 0,\n      cIndex = 0;\n    for (i = 0, ii = figures.length; i < ii; i++) {\n      var figure = figures[i],\n        ps = figure.coords,\n        cs = figure.colors;\n      switch (figure.type) {\n        case \"lattice\":\n          var cols = figure.verticesPerRow;\n          rows = (ps.length / cols) | 0;\n          for (var row = 1; row < rows; row++) {\n            var offset = row * cols + 1;\n            for (var col = 1; col < cols; col++, offset++) {\n              coords[pIndex] = coordsMap[ps[offset - cols - 1]];\n              coords[pIndex + 1] = coordsMap[ps[offset - cols - 1] + 1];\n              coords[pIndex + 2] = coordsMap[ps[offset - cols]];\n              coords[pIndex + 3] = coordsMap[ps[offset - cols] + 1];\n              coords[pIndex + 4] = coordsMap[ps[offset - 1]];\n              coords[pIndex + 5] = coordsMap[ps[offset - 1] + 1];\n              colors[cIndex] = colorsMap[cs[offset - cols - 1]];\n              colors[cIndex + 1] = colorsMap[cs[offset - cols - 1] + 1];\n              colors[cIndex + 2] = colorsMap[cs[offset - cols - 1] + 2];\n              colors[cIndex + 3] = colorsMap[cs[offset - cols]];\n              colors[cIndex + 4] = colorsMap[cs[offset - cols] + 1];\n              colors[cIndex + 5] = colorsMap[cs[offset - cols] + 2];\n              colors[cIndex + 6] = colorsMap[cs[offset - 1]];\n              colors[cIndex + 7] = colorsMap[cs[offset - 1] + 1];\n              colors[cIndex + 8] = colorsMap[cs[offset - 1] + 2];\n\n              coords[pIndex + 6] = coords[pIndex + 2];\n              coords[pIndex + 7] = coords[pIndex + 3];\n              coords[pIndex + 8] = coords[pIndex + 4];\n              coords[pIndex + 9] = coords[pIndex + 5];\n              coords[pIndex + 10] = coordsMap[ps[offset]];\n              coords[pIndex + 11] = coordsMap[ps[offset] + 1];\n              colors[cIndex + 9] = colors[cIndex + 3];\n              colors[cIndex + 10] = colors[cIndex + 4];\n              colors[cIndex + 11] = colors[cIndex + 5];\n              colors[cIndex + 12] = colors[cIndex + 6];\n              colors[cIndex + 13] = colors[cIndex + 7];\n              colors[cIndex + 14] = colors[cIndex + 8];\n              colors[cIndex + 15] = colorsMap[cs[offset]];\n              colors[cIndex + 16] = colorsMap[cs[offset] + 1];\n              colors[cIndex + 17] = colorsMap[cs[offset] + 2];\n              pIndex += 12;\n              cIndex += 18;\n            }\n          }\n          break;\n        case \"triangles\":\n          for (var j = 0, jj = ps.length; j < jj; j++) {\n            coords[pIndex] = coordsMap[ps[j]];\n            coords[pIndex + 1] = coordsMap[ps[j] + 1];\n            colors[cIndex] = colorsMap[cs[j]];\n            colors[cIndex + 1] = colorsMap[cs[j] + 1];\n            colors[cIndex + 2] = colorsMap[cs[j] + 2];\n            pIndex += 2;\n            cIndex += 3;\n          }\n          break;\n      }\n    }\n\n    // draw\n    if (backgroundColor) {\n      gl.clearColor(\n        backgroundColor[0] / 255,\n        backgroundColor[1] / 255,\n        backgroundColor[2] / 255,\n        1.0\n      );\n    } else {\n      gl.clearColor(0, 0, 0, 0);\n    }\n    gl.clear(gl.COLOR_BUFFER_BIT);\n\n    var coordsBuffer = gl.createBuffer();\n    gl.bindBuffer(gl.ARRAY_BUFFER, coordsBuffer);\n    gl.bufferData(gl.ARRAY_BUFFER, coords, gl.STATIC_DRAW);\n    gl.enableVertexAttribArray(cache.positionLocation);\n    gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0);\n\n    var colorsBuffer = gl.createBuffer();\n    gl.bindBuffer(gl.ARRAY_BUFFER, colorsBuffer);\n    gl.bufferData(gl.ARRAY_BUFFER, colors, gl.STATIC_DRAW);\n    gl.enableVertexAttribArray(cache.colorLocation);\n    gl.vertexAttribPointer(\n      cache.colorLocation,\n      3,\n      gl.UNSIGNED_BYTE,\n      false,\n      0,\n      0\n    );\n\n    gl.uniform2f(cache.scaleLocation, context.scaleX, context.scaleY);\n    gl.uniform2f(cache.offsetLocation, context.offsetX, context.offsetY);\n\n    gl.drawArrays(gl.TRIANGLES, 0, count);\n\n    gl.flush();\n\n    gl.deleteBuffer(coordsBuffer);\n    gl.deleteBuffer(colorsBuffer);\n\n    return canvas;\n  }\n\n  return {\n    tryInitGL() {\n      try {\n        generateGL();\n        return !!currentGL;\n      } catch (ex) {}\n      return false;\n    },\n\n    composeSMask,\n\n    drawFigures,\n\n    cleanup() {\n      if (smaskCache && smaskCache.canvas) {\n        smaskCache.canvas.width = 0;\n        smaskCache.canvas.height = 0;\n      }\n      if (figuresCache && figuresCache.canvas) {\n        figuresCache.canvas.width = 0;\n        figuresCache.canvas.height = 0;\n      }\n      smaskCache = null;\n      figuresCache = null;\n    },\n  };\n})();\n\nexport { WebGLContext };\n","/* Copyright 2014 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* eslint no-var: error */\n\nimport {\n  addLinkAttributes,\n  DOMSVGFactory,\n  getFilenameFromUrl,\n  LinkTarget,\n  PDFDateString,\n} from \"./display_utils.js\";\nimport {\n  AnnotationBorderStyleType,\n  AnnotationType,\n  stringToPDFString,\n  unreachable,\n  Util,\n  warn,\n} from \"../shared/util.js\";\n\n/**\n * @typedef {Object} AnnotationElementParameters\n * @property {Object} data\n * @property {HTMLDivElement} layer\n * @property {PDFPage} page\n * @property {PageViewport} viewport\n * @property {IPDFLinkService} linkService\n * @property {DownloadManager} downloadManager\n * @property {string} [imageResourcesPath] - Path for image resources, mainly\n *   for annotation icons. Include trailing slash.\n * @property {boolean} renderInteractiveForms\n * @property {Object} svgFactory\n */\n\nclass AnnotationElementFactory {\n  /**\n   * @param {AnnotationElementParameters} parameters\n   * @returns {AnnotationElement}\n   */\n  static create(parameters) {\n    const subtype = parameters.data.annotationType;\n\n    switch (subtype) {\n      case AnnotationType.LINK:\n        return new LinkAnnotationElement(parameters);\n\n      case AnnotationType.TEXT:\n        return new TextAnnotationElement(parameters);\n\n      case AnnotationType.WIDGET:\n        const fieldType = parameters.data.fieldType;\n\n        switch (fieldType) {\n          case \"Tx\":\n            return new TextWidgetAnnotationElement(parameters);\n          case \"Btn\":\n            if (parameters.data.radioButton) {\n              return new RadioButtonWidgetAnnotationElement(parameters);\n            } else if (parameters.data.checkBox) {\n              return new CheckboxWidgetAnnotationElement(parameters);\n            }\n            return new PushButtonWidgetAnnotationElement(parameters);\n          case \"Ch\":\n            return new ChoiceWidgetAnnotationElement(parameters);\n        }\n        return new WidgetAnnotationElement(parameters);\n\n      case AnnotationType.POPUP:\n        return new PopupAnnotationElement(parameters);\n\n      case AnnotationType.FREETEXT:\n        return new FreeTextAnnotationElement(parameters);\n\n      case AnnotationType.LINE:\n        return new LineAnnotationElement(parameters);\n\n      case AnnotationType.SQUARE:\n        return new SquareAnnotationElement(parameters);\n\n      case AnnotationType.CIRCLE:\n        return new CircleAnnotationElement(parameters);\n\n      case AnnotationType.POLYLINE:\n        return new PolylineAnnotationElement(parameters);\n\n      case AnnotationType.CARET:\n        return new CaretAnnotationElement(parameters);\n\n      case AnnotationType.INK:\n        return new InkAnnotationElement(parameters);\n\n      case AnnotationType.POLYGON:\n        return new PolygonAnnotationElement(parameters);\n\n      case AnnotationType.HIGHLIGHT:\n        return new HighlightAnnotationElement(parameters);\n\n      case AnnotationType.UNDERLINE:\n        return new UnderlineAnnotationElement(parameters);\n\n      case AnnotationType.SQUIGGLY:\n        return new SquigglyAnnotationElement(parameters);\n\n      case AnnotationType.STRIKEOUT:\n        return new StrikeOutAnnotationElement(parameters);\n\n      case AnnotationType.STAMP:\n        return new StampAnnotationElement(parameters);\n\n      case AnnotationType.FILEATTACHMENT:\n        return new FileAttachmentAnnotationElement(parameters);\n\n      default:\n        return new AnnotationElement(parameters);\n    }\n  }\n}\n\nclass AnnotationElement {\n  constructor(parameters, isRenderable = false, ignoreBorder = false) {\n    this.isRenderable = isRenderable;\n    this.data = parameters.data;\n    this.layer = parameters.layer;\n    this.page = parameters.page;\n    this.viewport = parameters.viewport;\n    this.linkService = parameters.linkService;\n    this.downloadManager = parameters.downloadManager;\n    this.imageResourcesPath = parameters.imageResourcesPath;\n    this.renderInteractiveForms = parameters.renderInteractiveForms;\n    this.svgFactory = parameters.svgFactory;\n\n    if (isRenderable) {\n      this.container = this._createContainer(ignoreBorder);\n    }\n  }\n\n  /**\n   * Create an empty container for the annotation's HTML element.\n   *\n   * @private\n   * @param {boolean} ignoreBorder\n   * @memberof AnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  _createContainer(ignoreBorder = false) {\n    const data = this.data,\n      page = this.page,\n      viewport = this.viewport;\n    const container = document.createElement(\"section\");\n    let width = data.rect[2] - data.rect[0];\n    let height = data.rect[3] - data.rect[1];\n\n    container.setAttribute(\"data-annotation-id\", data.id);\n\n    // Do *not* modify `data.rect`, since that will corrupt the annotation\n    // position on subsequent calls to `_createContainer` (see issue 6804).\n    const rect = Util.normalizeRect([\n      data.rect[0],\n      page.view[3] - data.rect[1] + page.view[1],\n      data.rect[2],\n      page.view[3] - data.rect[3] + page.view[1],\n    ]);\n\n    container.style.transform = `matrix(${viewport.transform.join(\",\")})`;\n    container.style.transformOrigin = `-${rect[0]}px -${rect[1]}px`;\n\n    if (!ignoreBorder && data.borderStyle.width > 0) {\n      container.style.borderWidth = `${data.borderStyle.width}px`;\n      if (data.borderStyle.style !== AnnotationBorderStyleType.UNDERLINE) {\n        // Underline styles only have a bottom border, so we do not need\n        // to adjust for all borders. This yields a similar result as\n        // Adobe Acrobat/Reader.\n        width = width - 2 * data.borderStyle.width;\n        height = height - 2 * data.borderStyle.width;\n      }\n\n      const horizontalRadius = data.borderStyle.horizontalCornerRadius;\n      const verticalRadius = data.borderStyle.verticalCornerRadius;\n      if (horizontalRadius > 0 || verticalRadius > 0) {\n        const radius = `${horizontalRadius}px / ${verticalRadius}px`;\n        container.style.borderRadius = radius;\n      }\n\n      switch (data.borderStyle.style) {\n        case AnnotationBorderStyleType.SOLID:\n          container.style.borderStyle = \"solid\";\n          break;\n\n        case AnnotationBorderStyleType.DASHED:\n          container.style.borderStyle = \"dashed\";\n          break;\n\n        case AnnotationBorderStyleType.BEVELED:\n          warn(\"Unimplemented border style: beveled\");\n          break;\n\n        case AnnotationBorderStyleType.INSET:\n          warn(\"Unimplemented border style: inset\");\n          break;\n\n        case AnnotationBorderStyleType.UNDERLINE:\n          container.style.borderBottomStyle = \"solid\";\n          break;\n\n        default:\n          break;\n      }\n\n      if (data.color) {\n        container.style.borderColor = Util.makeCssRgb(\n          data.color[0] | 0,\n          data.color[1] | 0,\n          data.color[2] | 0\n        );\n      } else {\n        // Transparent (invisible) border, so do not draw it at all.\n        container.style.borderWidth = 0;\n      }\n    }\n\n    container.style.left = `${rect[0]}px`;\n    container.style.top = `${rect[1]}px`;\n    container.style.width = `${width}px`;\n    container.style.height = `${height}px`;\n    return container;\n  }\n\n  /**\n   * Create a popup for the annotation's HTML element. This is used for\n   * annotations that do not have a Popup entry in the dictionary, but\n   * are of a type that works with popups (such as Highlight annotations).\n   *\n   * @private\n   * @param {HTMLSectionElement} container\n   * @param {HTMLDivElement|HTMLImageElement|null} trigger\n   * @param {Object} data\n   * @memberof AnnotationElement\n   */\n  _createPopup(container, trigger, data) {\n    // If no trigger element is specified, create it.\n    if (!trigger) {\n      trigger = document.createElement(\"div\");\n      trigger.style.height = container.style.height;\n      trigger.style.width = container.style.width;\n      container.appendChild(trigger);\n    }\n\n    const popupElement = new PopupElement({\n      container,\n      trigger,\n      color: data.color,\n      title: data.title,\n      modificationDate: data.modificationDate,\n      contents: data.contents,\n      hideWrapper: true,\n    });\n    const popup = popupElement.render();\n\n    // Position the popup next to the annotation's container.\n    popup.style.left = container.style.width;\n\n    container.appendChild(popup);\n  }\n\n  /**\n   * Render the annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof AnnotationElement\n   */\n  render() {\n    unreachable(\"Abstract method `AnnotationElement.render` called\");\n  }\n}\n\nclass LinkAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.url ||\n      parameters.data.dest ||\n      parameters.data.action\n    );\n    super(parameters, isRenderable);\n  }\n\n  /**\n   * Render the link annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof LinkAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"linkAnnotation\";\n\n    const { data, linkService } = this;\n    const link = document.createElement(\"a\");\n\n    if (data.url) {\n      addLinkAttributes(link, {\n        url: data.url,\n        target: data.newWindow\n          ? LinkTarget.BLANK\n          : linkService.externalLinkTarget,\n        rel: linkService.externalLinkRel,\n        enabled: linkService.externalLinkEnabled,\n      });\n    } else if (data.action) {\n      this._bindNamedAction(link, data.action);\n    } else {\n      this._bindLink(link, data.dest);\n    }\n\n    this.container.appendChild(link);\n    return this.container;\n  }\n\n  /**\n   * Bind internal links to the link element.\n   *\n   * @private\n   * @param {Object} link\n   * @param {Object} destination\n   * @memberof LinkAnnotationElement\n   */\n  _bindLink(link, destination) {\n    link.href = this.linkService.getDestinationHash(destination);\n    link.onclick = () => {\n      if (destination) {\n        this.linkService.navigateTo(destination);\n      }\n      return false;\n    };\n    if (destination) {\n      link.className = \"internalLink\";\n    }\n  }\n\n  /**\n   * Bind named actions to the link element.\n   *\n   * @private\n   * @param {Object} link\n   * @param {Object} action\n   * @memberof LinkAnnotationElement\n   */\n  _bindNamedAction(link, action) {\n    link.href = this.linkService.getAnchorUrl(\"\");\n    link.onclick = () => {\n      this.linkService.executeNamedAction(action);\n      return false;\n    };\n    link.className = \"internalLink\";\n  }\n}\n\nclass TextAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable);\n  }\n\n  /**\n   * Render the text annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof TextAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"textAnnotation\";\n\n    const image = document.createElement(\"img\");\n    image.style.height = this.container.style.height;\n    image.style.width = this.container.style.width;\n    image.src =\n      this.imageResourcesPath +\n      \"annotation-\" +\n      this.data.name.toLowerCase() +\n      \".svg\";\n    image.alt = \"[{{type}} Annotation]\";\n    image.dataset.l10nId = \"text_annotation_type\";\n    image.dataset.l10nArgs = JSON.stringify({ type: this.data.name });\n\n    if (!this.data.hasPopup) {\n      this._createPopup(this.container, image, this.data);\n    }\n\n    this.container.appendChild(image);\n    return this.container;\n  }\n}\n\nclass WidgetAnnotationElement extends AnnotationElement {\n  /**\n   * Render the widget annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof WidgetAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    // Show only the container for unsupported field types.\n    return this.container;\n  }\n}\n\nclass TextWidgetAnnotationElement extends WidgetAnnotationElement {\n  constructor(parameters) {\n    const isRenderable =\n      parameters.renderInteractiveForms ||\n      (!parameters.data.hasAppearance && !!parameters.data.fieldValue);\n    super(parameters, isRenderable);\n  }\n\n  /**\n   * Render the text widget annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof TextWidgetAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    const TEXT_ALIGNMENT = [\"left\", \"center\", \"right\"];\n\n    this.container.className = \"textWidgetAnnotation\";\n\n    let element = null;\n    if (this.renderInteractiveForms) {\n      // NOTE: We cannot set the values using `element.value` below, since it\n      //       prevents the AnnotationLayer rasterizer in `test/driver.js`\n      //       from parsing the elements correctly for the reference tests.\n      if (this.data.multiLine) {\n        element = document.createElement(\"textarea\");\n        element.textContent = this.data.fieldValue;\n      } else {\n        element = document.createElement(\"input\");\n        element.type = \"text\";\n        element.setAttribute(\"value\", this.data.fieldValue);\n      }\n\n      element.disabled = this.data.readOnly;\n      element.name = this.data.fieldName;\n\n      if (this.data.maxLen !== null) {\n        element.maxLength = this.data.maxLen;\n      }\n\n      if (this.data.comb) {\n        const fieldWidth = this.data.rect[2] - this.data.rect[0];\n        const combWidth = fieldWidth / this.data.maxLen;\n\n        element.classList.add(\"comb\");\n        element.style.letterSpacing = `calc(${combWidth}px - 1ch)`;\n      }\n    } else {\n      element = document.createElement(\"div\");\n      element.textContent = this.data.fieldValue;\n      element.style.verticalAlign = \"middle\";\n      element.style.display = \"table-cell\";\n\n      let font = null;\n      if (\n        this.data.fontRefName &&\n        this.page.commonObjs.has(this.data.fontRefName)\n      ) {\n        font = this.page.commonObjs.get(this.data.fontRefName);\n      }\n      this._setTextStyle(element, font);\n    }\n\n    if (this.data.textAlignment !== null) {\n      element.style.textAlign = TEXT_ALIGNMENT[this.data.textAlignment];\n    }\n\n    this.container.appendChild(element);\n    return this.container;\n  }\n\n  /**\n   * Apply text styles to the text in the element.\n   *\n   * @private\n   * @param {HTMLDivElement} element\n   * @param {Object} font\n   * @memberof TextWidgetAnnotationElement\n   */\n  _setTextStyle(element, font) {\n    // TODO: This duplicates some of the logic in CanvasGraphics.setFont().\n    const style = element.style;\n    style.fontSize = `${this.data.fontSize}px`;\n    style.direction = this.data.fontDirection < 0 ? \"rtl\" : \"ltr\";\n\n    if (!font) {\n      return;\n    }\n\n    let bold = \"normal\";\n    if (font.black) {\n      bold = \"900\";\n    } else if (font.bold) {\n      bold = \"bold\";\n    }\n    style.fontWeight = bold;\n    style.fontStyle = font.italic ? \"italic\" : \"normal\";\n\n    // Use a reasonable default font if the font doesn't specify a fallback.\n    const fontFamily = font.loadedName ? `\"${font.loadedName}\", ` : \"\";\n    const fallbackName = font.fallbackName || \"Helvetica, sans-serif\";\n    style.fontFamily = fontFamily + fallbackName;\n  }\n}\n\nclass CheckboxWidgetAnnotationElement extends WidgetAnnotationElement {\n  constructor(parameters) {\n    super(parameters, parameters.renderInteractiveForms);\n  }\n\n  /**\n   * Render the checkbox widget annotation's HTML element\n   * in the empty container.\n   *\n   * @public\n   * @memberof CheckboxWidgetAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"buttonWidgetAnnotation checkBox\";\n\n    const element = document.createElement(\"input\");\n    element.disabled = this.data.readOnly;\n    element.type = \"checkbox\";\n    element.name = this.data.fieldName;\n    if (this.data.fieldValue && this.data.fieldValue !== \"Off\") {\n      element.setAttribute(\"checked\", true);\n    }\n\n    this.container.appendChild(element);\n    return this.container;\n  }\n}\n\nclass RadioButtonWidgetAnnotationElement extends WidgetAnnotationElement {\n  constructor(parameters) {\n    super(parameters, parameters.renderInteractiveForms);\n  }\n\n  /**\n   * Render the radio button widget annotation's HTML element\n   * in the empty container.\n   *\n   * @public\n   * @memberof RadioButtonWidgetAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"buttonWidgetAnnotation radioButton\";\n\n    const element = document.createElement(\"input\");\n    element.disabled = this.data.readOnly;\n    element.type = \"radio\";\n    element.name = this.data.fieldName;\n    if (this.data.fieldValue === this.data.buttonValue) {\n      element.setAttribute(\"checked\", true);\n    }\n\n    this.container.appendChild(element);\n    return this.container;\n  }\n}\n\nclass PushButtonWidgetAnnotationElement extends LinkAnnotationElement {\n  /**\n   * Render the push button widget annotation's HTML element\n   * in the empty container.\n   *\n   * @public\n   * @memberof PushButtonWidgetAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    // The rendering and functionality of a push button widget annotation is\n    // equal to that of a link annotation, but may have more functionality, such\n    // as performing actions on form fields (resetting, submitting, et cetera).\n    const container = super.render();\n    container.className = \"buttonWidgetAnnotation pushButton\";\n    return container;\n  }\n}\n\nclass ChoiceWidgetAnnotationElement extends WidgetAnnotationElement {\n  constructor(parameters) {\n    super(parameters, parameters.renderInteractiveForms);\n  }\n\n  /**\n   * Render the choice widget annotation's HTML element in the empty\n   * container.\n   *\n   * @public\n   * @memberof ChoiceWidgetAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"choiceWidgetAnnotation\";\n\n    const selectElement = document.createElement(\"select\");\n    selectElement.disabled = this.data.readOnly;\n    selectElement.name = this.data.fieldName;\n\n    if (!this.data.combo) {\n      // List boxes have a size and (optionally) multiple selection.\n      selectElement.size = this.data.options.length;\n      if (this.data.multiSelect) {\n        selectElement.multiple = true;\n      }\n    }\n\n    // Insert the options into the choice field.\n    for (const option of this.data.options) {\n      const optionElement = document.createElement(\"option\");\n      optionElement.textContent = option.displayValue;\n      optionElement.value = option.exportValue;\n      if (this.data.fieldValue.includes(option.displayValue)) {\n        optionElement.setAttribute(\"selected\", true);\n      }\n      selectElement.appendChild(optionElement);\n    }\n\n    this.container.appendChild(selectElement);\n    return this.container;\n  }\n}\n\nclass PopupAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(parameters.data.title || parameters.data.contents);\n    super(parameters, isRenderable);\n  }\n\n  /**\n   * Render the popup annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof PopupAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    // Do not render popup annotations for parent elements with these types as\n    // they create the popups themselves (because of custom trigger divs).\n    const IGNORE_TYPES = [\n      \"Line\",\n      \"Square\",\n      \"Circle\",\n      \"PolyLine\",\n      \"Polygon\",\n      \"Ink\",\n    ];\n\n    this.container.className = \"popupAnnotation\";\n\n    if (IGNORE_TYPES.includes(this.data.parentType)) {\n      return this.container;\n    }\n\n    const selector = `[data-annotation-id=\"${this.data.parentId}\"]`;\n    const parentElement = this.layer.querySelector(selector);\n    if (!parentElement) {\n      return this.container;\n    }\n\n    const popup = new PopupElement({\n      container: this.container,\n      trigger: parentElement,\n      color: this.data.color,\n      title: this.data.title,\n      modificationDate: this.data.modificationDate,\n      contents: this.data.contents,\n    });\n\n    // Position the popup next to the parent annotation's container.\n    // PDF viewers ignore a popup annotation's rectangle.\n    const parentLeft = parseFloat(parentElement.style.left);\n    const parentWidth = parseFloat(parentElement.style.width);\n    this.container.style.transformOrigin = `-${parentLeft + parentWidth}px -${\n      parentElement.style.top\n    }`;\n    this.container.style.left = `${parentLeft + parentWidth}px`;\n\n    this.container.appendChild(popup.render());\n    return this.container;\n  }\n}\n\nclass PopupElement {\n  constructor(parameters) {\n    this.container = parameters.container;\n    this.trigger = parameters.trigger;\n    this.color = parameters.color;\n    this.title = parameters.title;\n    this.modificationDate = parameters.modificationDate;\n    this.contents = parameters.contents;\n    this.hideWrapper = parameters.hideWrapper || false;\n\n    this.pinned = false;\n  }\n\n  /**\n   * Render the popup's HTML element.\n   *\n   * @public\n   * @memberof PopupElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    const BACKGROUND_ENLIGHT = 0.7;\n\n    const wrapper = document.createElement(\"div\");\n    wrapper.className = \"popupWrapper\";\n\n    // For Popup annotations we hide the entire section because it contains\n    // only the popup. However, for Text annotations without a separate Popup\n    // annotation, we cannot hide the entire container as the image would\n    // disappear too. In that special case, hiding the wrapper suffices.\n    this.hideElement = this.hideWrapper ? wrapper : this.container;\n    this.hideElement.setAttribute(\"hidden\", true);\n\n    const popup = document.createElement(\"div\");\n    popup.className = \"popup\";\n\n    const color = this.color;\n    if (color) {\n      // Enlighten the color.\n      const r = BACKGROUND_ENLIGHT * (255 - color[0]) + color[0];\n      const g = BACKGROUND_ENLIGHT * (255 - color[1]) + color[1];\n      const b = BACKGROUND_ENLIGHT * (255 - color[2]) + color[2];\n      popup.style.backgroundColor = Util.makeCssRgb(r | 0, g | 0, b | 0);\n    }\n\n    const title = document.createElement(\"h1\");\n    title.textContent = this.title;\n    popup.appendChild(title);\n\n    // The modification date is shown in the popup instead of the creation\n    // date if it is available and can be parsed correctly, which is\n    // consistent with other viewers such as Adobe Acrobat.\n    const dateObject = PDFDateString.toDateObject(this.modificationDate);\n    if (dateObject) {\n      const modificationDate = document.createElement(\"span\");\n      modificationDate.textContent = \"{{date}}, {{time}}\";\n      modificationDate.dataset.l10nId = \"annotation_date_string\";\n      modificationDate.dataset.l10nArgs = JSON.stringify({\n        date: dateObject.toLocaleDateString(),\n        time: dateObject.toLocaleTimeString(),\n      });\n      popup.appendChild(modificationDate);\n    }\n\n    const contents = this._formatContents(this.contents);\n    popup.appendChild(contents);\n\n    // Attach the event listeners to the trigger element.\n    this.trigger.addEventListener(\"click\", this._toggle.bind(this));\n    this.trigger.addEventListener(\"mouseover\", this._show.bind(this, false));\n    this.trigger.addEventListener(\"mouseout\", this._hide.bind(this, false));\n    popup.addEventListener(\"click\", this._hide.bind(this, true));\n\n    wrapper.appendChild(popup);\n    return wrapper;\n  }\n\n  /**\n   * Format the contents of the popup by adding newlines where necessary.\n   *\n   * @private\n   * @param {string} contents\n   * @memberof PopupElement\n   * @returns {HTMLParagraphElement}\n   */\n  _formatContents(contents) {\n    const p = document.createElement(\"p\");\n    const lines = contents.split(/(?:\\r\\n?|\\n)/);\n    for (let i = 0, ii = lines.length; i < ii; ++i) {\n      const line = lines[i];\n      p.appendChild(document.createTextNode(line));\n      if (i < ii - 1) {\n        p.appendChild(document.createElement(\"br\"));\n      }\n    }\n    return p;\n  }\n\n  /**\n   * Toggle the visibility of the popup.\n   *\n   * @private\n   * @memberof PopupElement\n   */\n  _toggle() {\n    if (this.pinned) {\n      this._hide(true);\n    } else {\n      this._show(true);\n    }\n  }\n\n  /**\n   * Show the popup.\n   *\n   * @private\n   * @param {boolean} pin\n   * @memberof PopupElement\n   */\n  _show(pin = false) {\n    if (pin) {\n      this.pinned = true;\n    }\n    if (this.hideElement.hasAttribute(\"hidden\")) {\n      this.hideElement.removeAttribute(\"hidden\");\n      this.container.style.zIndex += 1;\n    }\n  }\n\n  /**\n   * Hide the popup.\n   *\n   * @private\n   * @param {boolean} unpin\n   * @memberof PopupElement\n   */\n  _hide(unpin = true) {\n    if (unpin) {\n      this.pinned = false;\n    }\n    if (!this.hideElement.hasAttribute(\"hidden\") && !this.pinned) {\n      this.hideElement.setAttribute(\"hidden\", true);\n      this.container.style.zIndex -= 1;\n    }\n  }\n}\n\nclass FreeTextAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n  }\n\n  /**\n   * Render the free text annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof FreeTextAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"freeTextAnnotation\";\n\n    if (!this.data.hasPopup) {\n      this._createPopup(this.container, null, this.data);\n    }\n    return this.container;\n  }\n}\n\nclass LineAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n  }\n\n  /**\n   * Render the line annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof LineAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"lineAnnotation\";\n\n    // Create an invisible line with the same starting and ending coordinates\n    // that acts as the trigger for the popup. Only the line itself should\n    // trigger the popup, not the entire container.\n    const data = this.data;\n    const width = data.rect[2] - data.rect[0];\n    const height = data.rect[3] - data.rect[1];\n    const svg = this.svgFactory.create(width, height);\n\n    // PDF coordinates are calculated from a bottom left origin, so transform\n    // the line coordinates to a top left origin for the SVG element.\n    const line = this.svgFactory.createElement(\"svg:line\");\n    line.setAttribute(\"x1\", data.rect[2] - data.lineCoordinates[0]);\n    line.setAttribute(\"y1\", data.rect[3] - data.lineCoordinates[1]);\n    line.setAttribute(\"x2\", data.rect[2] - data.lineCoordinates[2]);\n    line.setAttribute(\"y2\", data.rect[3] - data.lineCoordinates[3]);\n    // Ensure that the 'stroke-width' is always non-zero, since otherwise it\n    // won't be possible to open/close the popup (note e.g. issue 11122).\n    line.setAttribute(\"stroke-width\", data.borderStyle.width || 1);\n    line.setAttribute(\"stroke\", \"transparent\");\n\n    svg.appendChild(line);\n    this.container.append(svg);\n\n    // Create the popup ourselves so that we can bind it to the line instead\n    // of to the entire container (which is the default).\n    this._createPopup(this.container, line, data);\n\n    return this.container;\n  }\n}\n\nclass SquareAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n  }\n\n  /**\n   * Render the square annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof SquareAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"squareAnnotation\";\n\n    // Create an invisible square with the same rectangle that acts as the\n    // trigger for the popup. Only the square itself should trigger the\n    // popup, not the entire container.\n    const data = this.data;\n    const width = data.rect[2] - data.rect[0];\n    const height = data.rect[3] - data.rect[1];\n    const svg = this.svgFactory.create(width, height);\n\n    // The browser draws half of the borders inside the square and half of\n    // the borders outside the square by default. This behavior cannot be\n    // changed programmatically, so correct for that here.\n    const borderWidth = data.borderStyle.width;\n    const square = this.svgFactory.createElement(\"svg:rect\");\n    square.setAttribute(\"x\", borderWidth / 2);\n    square.setAttribute(\"y\", borderWidth / 2);\n    square.setAttribute(\"width\", width - borderWidth);\n    square.setAttribute(\"height\", height - borderWidth);\n    // Ensure that the 'stroke-width' is always non-zero, since otherwise it\n    // won't be possible to open/close the popup (note e.g. issue 11122).\n    square.setAttribute(\"stroke-width\", borderWidth || 1);\n    square.setAttribute(\"stroke\", \"transparent\");\n    square.setAttribute(\"fill\", \"none\");\n\n    svg.appendChild(square);\n    this.container.append(svg);\n\n    // Create the popup ourselves so that we can bind it to the square instead\n    // of to the entire container (which is the default).\n    this._createPopup(this.container, square, data);\n\n    return this.container;\n  }\n}\n\nclass CircleAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n  }\n\n  /**\n   * Render the circle annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof CircleAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"circleAnnotation\";\n\n    // Create an invisible circle with the same ellipse that acts as the\n    // trigger for the popup. Only the circle itself should trigger the\n    // popup, not the entire container.\n    const data = this.data;\n    const width = data.rect[2] - data.rect[0];\n    const height = data.rect[3] - data.rect[1];\n    const svg = this.svgFactory.create(width, height);\n\n    // The browser draws half of the borders inside the circle and half of\n    // the borders outside the circle by default. This behavior cannot be\n    // changed programmatically, so correct for that here.\n    const borderWidth = data.borderStyle.width;\n    const circle = this.svgFactory.createElement(\"svg:ellipse\");\n    circle.setAttribute(\"cx\", width / 2);\n    circle.setAttribute(\"cy\", height / 2);\n    circle.setAttribute(\"rx\", width / 2 - borderWidth / 2);\n    circle.setAttribute(\"ry\", height / 2 - borderWidth / 2);\n    // Ensure that the 'stroke-width' is always non-zero, since otherwise it\n    // won't be possible to open/close the popup (note e.g. issue 11122).\n    circle.setAttribute(\"stroke-width\", borderWidth || 1);\n    circle.setAttribute(\"stroke\", \"transparent\");\n    circle.setAttribute(\"fill\", \"none\");\n\n    svg.appendChild(circle);\n    this.container.append(svg);\n\n    // Create the popup ourselves so that we can bind it to the circle instead\n    // of to the entire container (which is the default).\n    this._createPopup(this.container, circle, data);\n\n    return this.container;\n  }\n}\n\nclass PolylineAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n\n    this.containerClassName = \"polylineAnnotation\";\n    this.svgElementName = \"svg:polyline\";\n  }\n\n  /**\n   * Render the polyline annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof PolylineAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = this.containerClassName;\n\n    // Create an invisible polyline with the same points that acts as the\n    // trigger for the popup. Only the polyline itself should trigger the\n    // popup, not the entire container.\n    const data = this.data;\n    const width = data.rect[2] - data.rect[0];\n    const height = data.rect[3] - data.rect[1];\n    const svg = this.svgFactory.create(width, height);\n\n    // Convert the vertices array to a single points string that the SVG\n    // polyline element expects (\"x1,y1 x2,y2 ...\"). PDF coordinates are\n    // calculated from a bottom left origin, so transform the polyline\n    // coordinates to a top left origin for the SVG element.\n    let points = [];\n    for (const coordinate of data.vertices) {\n      const x = coordinate.x - data.rect[0];\n      const y = data.rect[3] - coordinate.y;\n      points.push(x + \",\" + y);\n    }\n    points = points.join(\" \");\n\n    const polyline = this.svgFactory.createElement(this.svgElementName);\n    polyline.setAttribute(\"points\", points);\n    // Ensure that the 'stroke-width' is always non-zero, since otherwise it\n    // won't be possible to open/close the popup (note e.g. issue 11122).\n    polyline.setAttribute(\"stroke-width\", data.borderStyle.width || 1);\n    polyline.setAttribute(\"stroke\", \"transparent\");\n    polyline.setAttribute(\"fill\", \"none\");\n\n    svg.appendChild(polyline);\n    this.container.append(svg);\n\n    // Create the popup ourselves so that we can bind it to the polyline\n    // instead of to the entire container (which is the default).\n    this._createPopup(this.container, polyline, data);\n\n    return this.container;\n  }\n}\n\nclass PolygonAnnotationElement extends PolylineAnnotationElement {\n  constructor(parameters) {\n    // Polygons are specific forms of polylines, so reuse their logic.\n    super(parameters);\n\n    this.containerClassName = \"polygonAnnotation\";\n    this.svgElementName = \"svg:polygon\";\n  }\n}\n\nclass CaretAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n  }\n\n  /**\n   * Render the caret annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof CaretAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"caretAnnotation\";\n\n    if (!this.data.hasPopup) {\n      this._createPopup(this.container, null, this.data);\n    }\n    return this.container;\n  }\n}\n\nclass InkAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n\n    this.containerClassName = \"inkAnnotation\";\n\n    // Use the polyline SVG element since it allows us to use coordinates\n    // directly and to draw both straight lines and curves.\n    this.svgElementName = \"svg:polyline\";\n  }\n\n  /**\n   * Render the ink annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof InkAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = this.containerClassName;\n\n    // Create an invisible polyline with the same points that acts as the\n    // trigger for the popup.\n    const data = this.data;\n    const width = data.rect[2] - data.rect[0];\n    const height = data.rect[3] - data.rect[1];\n    const svg = this.svgFactory.create(width, height);\n\n    for (const inkList of data.inkLists) {\n      // Convert the ink list to a single points string that the SVG\n      // polyline element expects (\"x1,y1 x2,y2 ...\"). PDF coordinates are\n      // calculated from a bottom left origin, so transform the polyline\n      // coordinates to a top left origin for the SVG element.\n      let points = [];\n      for (const coordinate of inkList) {\n        const x = coordinate.x - data.rect[0];\n        const y = data.rect[3] - coordinate.y;\n        points.push(`${x},${y}`);\n      }\n      points = points.join(\" \");\n\n      const polyline = this.svgFactory.createElement(this.svgElementName);\n      polyline.setAttribute(\"points\", points);\n      // Ensure that the 'stroke-width' is always non-zero, since otherwise it\n      // won't be possible to open/close the popup (note e.g. issue 11122).\n      polyline.setAttribute(\"stroke-width\", data.borderStyle.width || 1);\n      polyline.setAttribute(\"stroke\", \"transparent\");\n      polyline.setAttribute(\"fill\", \"none\");\n\n      // Create the popup ourselves so that we can bind it to the polyline\n      // instead of to the entire container (which is the default).\n      this._createPopup(this.container, polyline, data);\n\n      svg.appendChild(polyline);\n    }\n\n    this.container.append(svg);\n    return this.container;\n  }\n}\n\nclass HighlightAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n  }\n\n  /**\n   * Render the highlight annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof HighlightAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"highlightAnnotation\";\n\n    if (!this.data.hasPopup) {\n      this._createPopup(this.container, null, this.data);\n    }\n    return this.container;\n  }\n}\n\nclass UnderlineAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n  }\n\n  /**\n   * Render the underline annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof UnderlineAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"underlineAnnotation\";\n\n    if (!this.data.hasPopup) {\n      this._createPopup(this.container, null, this.data);\n    }\n    return this.container;\n  }\n}\n\nclass SquigglyAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n  }\n\n  /**\n   * Render the squiggly annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof SquigglyAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"squigglyAnnotation\";\n\n    if (!this.data.hasPopup) {\n      this._createPopup(this.container, null, this.data);\n    }\n    return this.container;\n  }\n}\n\nclass StrikeOutAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n  }\n\n  /**\n   * Render the strikeout annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof StrikeOutAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"strikeoutAnnotation\";\n\n    if (!this.data.hasPopup) {\n      this._createPopup(this.container, null, this.data);\n    }\n    return this.container;\n  }\n}\n\nclass StampAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n  }\n\n  /**\n   * Render the stamp annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof StampAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"stampAnnotation\";\n\n    if (!this.data.hasPopup) {\n      this._createPopup(this.container, null, this.data);\n    }\n    return this.container;\n  }\n}\n\nclass FileAttachmentAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    super(parameters, /* isRenderable = */ true);\n\n    const { filename, content } = this.data.file;\n    this.filename = getFilenameFromUrl(filename);\n    this.content = content;\n\n    if (this.linkService.eventBus) {\n      this.linkService.eventBus.dispatch(\"fileattachmentannotation\", {\n        source: this,\n        id: stringToPDFString(filename),\n        filename,\n        content,\n      });\n    }\n  }\n\n  /**\n   * Render the file attachment annotation's HTML element in the empty\n   * container.\n   *\n   * @public\n   * @memberof FileAttachmentAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"fileAttachmentAnnotation\";\n\n    const trigger = document.createElement(\"div\");\n    trigger.style.height = this.container.style.height;\n    trigger.style.width = this.container.style.width;\n    trigger.addEventListener(\"dblclick\", this._download.bind(this));\n\n    if (!this.data.hasPopup && (this.data.title || this.data.contents)) {\n      this._createPopup(this.container, trigger, this.data);\n    }\n\n    this.container.appendChild(trigger);\n    return this.container;\n  }\n\n  /**\n   * Download the file attachment associated with this annotation.\n   *\n   * @private\n   * @memberof FileAttachmentAnnotationElement\n   */\n  _download() {\n    if (!this.downloadManager) {\n      warn(\"Download cannot be started due to unavailable download manager\");\n      return;\n    }\n    this.downloadManager.downloadData(this.content, this.filename, \"\");\n  }\n}\n\n/**\n * @typedef {Object} AnnotationLayerParameters\n * @property {PageViewport} viewport\n * @property {HTMLDivElement} div\n * @property {Array} annotations\n * @property {PDFPage} page\n * @property {IPDFLinkService} linkService\n * @property {DownloadManager} downloadManager\n * @property {string} [imageResourcesPath] - Path for image resources, mainly\n *   for annotation icons. Include trailing slash.\n * @property {boolean} renderInteractiveForms\n */\n\nclass AnnotationLayer {\n  /**\n   * Render a new annotation layer with all annotation elements.\n   *\n   * @public\n   * @param {AnnotationLayerParameters} parameters\n   * @memberof AnnotationLayer\n   */\n  static render(parameters) {\n    const sortedAnnotations = [],\n      popupAnnotations = [];\n    // Ensure that Popup annotations are handled last, since they're dependant\n    // upon the parent annotation having already been rendered (please refer to\n    // the `PopupAnnotationElement.render` method); fixes issue 11362.\n    for (const data of parameters.annotations) {\n      if (!data) {\n        continue;\n      }\n      if (data.annotationType === AnnotationType.POPUP) {\n        popupAnnotations.push(data);\n        continue;\n      }\n      sortedAnnotations.push(data);\n    }\n    if (popupAnnotations.length) {\n      sortedAnnotations.push(...popupAnnotations);\n    }\n\n    for (const data of sortedAnnotations) {\n      const element = AnnotationElementFactory.create({\n        data,\n        layer: parameters.div,\n        page: parameters.page,\n        viewport: parameters.viewport,\n        linkService: parameters.linkService,\n        downloadManager: parameters.downloadManager,\n        imageResourcesPath: parameters.imageResourcesPath || \"\",\n        renderInteractiveForms: parameters.renderInteractiveForms || false,\n        svgFactory: new DOMSVGFactory(),\n      });\n      if (element.isRenderable) {\n        parameters.div.appendChild(element.render());\n      }\n    }\n  }\n\n  /**\n   * Update the annotation elements on existing annotation layer.\n   *\n   * @public\n   * @param {AnnotationLayerParameters} parameters\n   * @memberof AnnotationLayer\n   */\n  static update(parameters) {\n    for (const data of parameters.annotations) {\n      const element = parameters.div.querySelector(\n        `[data-annotation-id=\"${data.id}\"]`\n      );\n      if (element) {\n        element.style.transform = `matrix(${parameters.viewport.transform.join(\n          \",\"\n        )})`;\n      }\n    }\n    parameters.div.removeAttribute(\"hidden\");\n  }\n}\n\nexport { AnnotationLayer };\n","/* Copyright 2015 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport {\n  AbortException,\n  createPromiseCapability,\n  Util,\n} from \"../shared/util.js\";\n\n/**\n * Text layer render parameters.\n *\n * @typedef {Object} TextLayerRenderParameters\n * @property {TextContent} [textContent] - Text content to render (the object\n *   is returned by the page's `getTextContent` method).\n * @property {ReadableStream} [textContentStream] - Text content stream to\n *   render (the stream is returned by the page's `streamTextContent` method).\n * @property {HTMLElement} container - HTML element that will contain text runs.\n * @property {PageViewport} viewport - The target viewport to properly\n *   layout the text runs.\n * @property {Array} [textDivs] - HTML elements that are correspond to the\n *   text items of the textContent input. This is output and shall be\n *   initially be set to empty array.\n * @property {Array} [textContentItemsStr] - Strings that correspond to the\n *   `str` property of the text items of textContent input. This is output\n *   and shall be initially be set to empty array.\n * @property {number} [timeout] - Delay in milliseconds before rendering of the\n *   text runs occurs.\n * @property {boolean} [enhanceTextSelection] - Whether to turn on the text\n *   selection enhancement.\n */\nvar renderTextLayer = (function renderTextLayerClosure() {\n  var MAX_TEXT_DIVS_TO_RENDER = 100000;\n\n  var NonWhitespaceRegexp = /\\S/;\n\n  function isAllWhitespace(str) {\n    return !NonWhitespaceRegexp.test(str);\n  }\n\n  function appendText(task, geom, styles) {\n    // Initialize all used properties to keep the caches monomorphic.\n    var textDiv = document.createElement(\"span\");\n    var textDivProperties = {\n      angle: 0,\n      canvasWidth: 0,\n      isWhitespace: false,\n      originalTransform: null,\n      paddingBottom: 0,\n      paddingLeft: 0,\n      paddingRight: 0,\n      paddingTop: 0,\n      scale: 1,\n    };\n\n    task._textDivs.push(textDiv);\n    if (isAllWhitespace(geom.str)) {\n      textDivProperties.isWhitespace = true;\n      task._textDivProperties.set(textDiv, textDivProperties);\n      return;\n    }\n\n    var tx = Util.transform(task._viewport.transform, geom.transform);\n    var angle = Math.atan2(tx[1], tx[0]);\n    var style = styles[geom.fontName];\n    if (style.vertical) {\n      angle += Math.PI / 2;\n    }\n    var fontHeight = Math.sqrt(tx[2] * tx[2] + tx[3] * tx[3]);\n    var fontAscent = fontHeight;\n    if (style.ascent) {\n      fontAscent = style.ascent * fontAscent;\n    } else if (style.descent) {\n      fontAscent = (1 + style.descent) * fontAscent;\n    }\n\n    let left, top;\n    if (angle === 0) {\n      left = tx[4];\n      top = tx[5] - fontAscent;\n    } else {\n      left = tx[4] + fontAscent * Math.sin(angle);\n      top = tx[5] - fontAscent * Math.cos(angle);\n    }\n    // Setting the style properties individually, rather than all at once,\n    // should be OK since the `textDiv` isn't appended to the document yet.\n    textDiv.style.left = `${left}px`;\n    textDiv.style.top = `${top}px`;\n    textDiv.style.fontSize = `${fontHeight}px`;\n    textDiv.style.fontFamily = style.fontFamily;\n\n    textDiv.textContent = geom.str;\n    // `fontName` is only used by the FontInspector, and we only use `dataset`\n    // here to make the font name available in the debugger.\n    if (task._fontInspectorEnabled) {\n      textDiv.dataset.fontName = geom.fontName;\n    }\n    if (angle !== 0) {\n      textDivProperties.angle = angle * (180 / Math.PI);\n    }\n    // We don't bother scaling single-char text divs, because it has very\n    // little effect on text highlighting. This makes scrolling on docs with\n    // lots of such divs a lot faster.\n    let shouldScaleText = false;\n    if (geom.str.length > 1) {\n      shouldScaleText = true;\n    } else if (geom.transform[0] !== geom.transform[3]) {\n      const absScaleX = Math.abs(geom.transform[0]),\n        absScaleY = Math.abs(geom.transform[3]);\n      // When the horizontal/vertical scaling differs significantly, also scale\n      // even single-char text to improve highlighting (fixes issue11713.pdf).\n      if (\n        absScaleX !== absScaleY &&\n        Math.max(absScaleX, absScaleY) / Math.min(absScaleX, absScaleY) > 1.5\n      ) {\n        shouldScaleText = true;\n      }\n    }\n    if (shouldScaleText) {\n      if (style.vertical) {\n        textDivProperties.canvasWidth = geom.height * task._viewport.scale;\n      } else {\n        textDivProperties.canvasWidth = geom.width * task._viewport.scale;\n      }\n    }\n    task._textDivProperties.set(textDiv, textDivProperties);\n    if (task._textContentStream) {\n      task._layoutText(textDiv);\n    }\n\n    if (task._enhanceTextSelection) {\n      var angleCos = 1,\n        angleSin = 0;\n      if (angle !== 0) {\n        angleCos = Math.cos(angle);\n        angleSin = Math.sin(angle);\n      }\n      var divWidth =\n        (style.vertical ? geom.height : geom.width) * task._viewport.scale;\n      var divHeight = fontHeight;\n\n      var m, b;\n      if (angle !== 0) {\n        m = [angleCos, angleSin, -angleSin, angleCos, left, top];\n        b = Util.getAxialAlignedBoundingBox([0, 0, divWidth, divHeight], m);\n      } else {\n        b = [left, top, left + divWidth, top + divHeight];\n      }\n\n      task._bounds.push({\n        left: b[0],\n        top: b[1],\n        right: b[2],\n        bottom: b[3],\n        div: textDiv,\n        size: [divWidth, divHeight],\n        m,\n      });\n    }\n  }\n\n  function render(task) {\n    if (task._canceled) {\n      return;\n    }\n    var textDivs = task._textDivs;\n    var capability = task._capability;\n    var textDivsLength = textDivs.length;\n\n    // No point in rendering many divs as it would make the browser\n    // unusable even after the divs are rendered.\n    if (textDivsLength > MAX_TEXT_DIVS_TO_RENDER) {\n      task._renderingDone = true;\n      capability.resolve();\n      return;\n    }\n\n    if (!task._textContentStream) {\n      for (var i = 0; i < textDivsLength; i++) {\n        task._layoutText(textDivs[i]);\n      }\n    }\n\n    task._renderingDone = true;\n    capability.resolve();\n  }\n\n  function findPositiveMin(ts, offset, count) {\n    let result = 0;\n    for (let i = 0; i < count; i++) {\n      const t = ts[offset++];\n      if (t > 0) {\n        result = result ? Math.min(t, result) : t;\n      }\n    }\n    return result;\n  }\n\n  function expand(task) {\n    var bounds = task._bounds;\n    var viewport = task._viewport;\n\n    var expanded = expandBounds(viewport.width, viewport.height, bounds);\n    for (var i = 0; i < expanded.length; i++) {\n      var div = bounds[i].div;\n      var divProperties = task._textDivProperties.get(div);\n      if (divProperties.angle === 0) {\n        divProperties.paddingLeft = bounds[i].left - expanded[i].left;\n        divProperties.paddingTop = bounds[i].top - expanded[i].top;\n        divProperties.paddingRight = expanded[i].right - bounds[i].right;\n        divProperties.paddingBottom = expanded[i].bottom - bounds[i].bottom;\n        task._textDivProperties.set(div, divProperties);\n        continue;\n      }\n      // Box is rotated -- trying to find padding so rotated div will not\n      // exceed its expanded bounds.\n      var e = expanded[i],\n        b = bounds[i];\n      var m = b.m,\n        c = m[0],\n        s = m[1];\n      // Finding intersections with expanded box.\n      var points = [[0, 0], [0, b.size[1]], [b.size[0], 0], b.size];\n      var ts = new Float64Array(64);\n      points.forEach(function (p, j) {\n        var t = Util.applyTransform(p, m);\n        ts[j + 0] = c && (e.left - t[0]) / c;\n        ts[j + 4] = s && (e.top - t[1]) / s;\n        ts[j + 8] = c && (e.right - t[0]) / c;\n        ts[j + 12] = s && (e.bottom - t[1]) / s;\n\n        ts[j + 16] = s && (e.left - t[0]) / -s;\n        ts[j + 20] = c && (e.top - t[1]) / c;\n        ts[j + 24] = s && (e.right - t[0]) / -s;\n        ts[j + 28] = c && (e.bottom - t[1]) / c;\n\n        ts[j + 32] = c && (e.left - t[0]) / -c;\n        ts[j + 36] = s && (e.top - t[1]) / -s;\n        ts[j + 40] = c && (e.right - t[0]) / -c;\n        ts[j + 44] = s && (e.bottom - t[1]) / -s;\n\n        ts[j + 48] = s && (e.left - t[0]) / s;\n        ts[j + 52] = c && (e.top - t[1]) / -c;\n        ts[j + 56] = s && (e.right - t[0]) / s;\n        ts[j + 60] = c && (e.bottom - t[1]) / -c;\n      });\n      // Not based on math, but to simplify calculations, using cos and sin\n      // absolute values to not exceed the box (it can but insignificantly).\n      var boxScale = 1 + Math.min(Math.abs(c), Math.abs(s));\n      divProperties.paddingLeft = findPositiveMin(ts, 32, 16) / boxScale;\n      divProperties.paddingTop = findPositiveMin(ts, 48, 16) / boxScale;\n      divProperties.paddingRight = findPositiveMin(ts, 0, 16) / boxScale;\n      divProperties.paddingBottom = findPositiveMin(ts, 16, 16) / boxScale;\n      task._textDivProperties.set(div, divProperties);\n    }\n  }\n\n  function expandBounds(width, height, boxes) {\n    var bounds = boxes.map(function (box, i) {\n      return {\n        x1: box.left,\n        y1: box.top,\n        x2: box.right,\n        y2: box.bottom,\n        index: i,\n        x1New: undefined,\n        x2New: undefined,\n      };\n    });\n    expandBoundsLTR(width, bounds);\n    var expanded = new Array(boxes.length);\n    bounds.forEach(function (b) {\n      var i = b.index;\n      expanded[i] = {\n        left: b.x1New,\n        top: 0,\n        right: b.x2New,\n        bottom: 0,\n      };\n    });\n\n    // Rotating on 90 degrees and extending extended boxes. Reusing the bounds\n    // array and objects.\n    boxes.map(function (box, i) {\n      var e = expanded[i],\n        b = bounds[i];\n      b.x1 = box.top;\n      b.y1 = width - e.right;\n      b.x2 = box.bottom;\n      b.y2 = width - e.left;\n      b.index = i;\n      b.x1New = undefined;\n      b.x2New = undefined;\n    });\n    expandBoundsLTR(height, bounds);\n\n    bounds.forEach(function (b) {\n      var i = b.index;\n      expanded[i].top = b.x1New;\n      expanded[i].bottom = b.x2New;\n    });\n    return expanded;\n  }\n\n  function expandBoundsLTR(width, bounds) {\n    // Sorting by x1 coordinate and walk by the bounds in the same order.\n    bounds.sort(function (a, b) {\n      return a.x1 - b.x1 || a.index - b.index;\n    });\n\n    // First we see on the horizon is a fake boundary.\n    var fakeBoundary = {\n      x1: -Infinity,\n      y1: -Infinity,\n      x2: 0,\n      y2: Infinity,\n      index: -1,\n      x1New: 0,\n      x2New: 0,\n    };\n    var horizon = [\n      {\n        start: -Infinity,\n        end: Infinity,\n        boundary: fakeBoundary,\n      },\n    ];\n\n    bounds.forEach(function (boundary) {\n      // Searching for the affected part of horizon.\n      // TODO red-black tree or simple binary search\n      var i = 0;\n      while (i < horizon.length && horizon[i].end <= boundary.y1) {\n        i++;\n      }\n      var j = horizon.length - 1;\n      while (j >= 0 && horizon[j].start >= boundary.y2) {\n        j--;\n      }\n\n      var horizonPart, affectedBoundary;\n      var q,\n        k,\n        maxXNew = -Infinity;\n      for (q = i; q <= j; q++) {\n        horizonPart = horizon[q];\n        affectedBoundary = horizonPart.boundary;\n        var xNew;\n        if (affectedBoundary.x2 > boundary.x1) {\n          // In the middle of the previous element, new x shall be at the\n          // boundary start. Extending if further if the affected boundary\n          // placed on top of the current one.\n          xNew =\n            affectedBoundary.index > boundary.index\n              ? affectedBoundary.x1New\n              : boundary.x1;\n        } else if (affectedBoundary.x2New === undefined) {\n          // We have some space in between, new x in middle will be a fair\n          // choice.\n          xNew = (affectedBoundary.x2 + boundary.x1) / 2;\n        } else {\n          // Affected boundary has x2new set, using it as new x.\n          xNew = affectedBoundary.x2New;\n        }\n        if (xNew > maxXNew) {\n          maxXNew = xNew;\n        }\n      }\n\n      // Set new x1 for current boundary.\n      boundary.x1New = maxXNew;\n\n      // Adjusts new x2 for the affected boundaries.\n      for (q = i; q <= j; q++) {\n        horizonPart = horizon[q];\n        affectedBoundary = horizonPart.boundary;\n        if (affectedBoundary.x2New === undefined) {\n          // Was not set yet, choosing new x if possible.\n          if (affectedBoundary.x2 > boundary.x1) {\n            // Current and affected boundaries intersect. If affected boundary\n            // is placed on top of the current, shrinking the affected.\n            if (affectedBoundary.index > boundary.index) {\n              affectedBoundary.x2New = affectedBoundary.x2;\n            }\n          } else {\n            affectedBoundary.x2New = maxXNew;\n          }\n        } else if (affectedBoundary.x2New > maxXNew) {\n          // Affected boundary is touching new x, pushing it back.\n          affectedBoundary.x2New = Math.max(maxXNew, affectedBoundary.x2);\n        }\n      }\n\n      // Fixing the horizon.\n      var changedHorizon = [],\n        lastBoundary = null;\n      for (q = i; q <= j; q++) {\n        horizonPart = horizon[q];\n        affectedBoundary = horizonPart.boundary;\n        // Checking which boundary will be visible.\n        var useBoundary =\n          affectedBoundary.x2 > boundary.x2 ? affectedBoundary : boundary;\n        if (lastBoundary === useBoundary) {\n          // Merging with previous.\n          changedHorizon[changedHorizon.length - 1].end = horizonPart.end;\n        } else {\n          changedHorizon.push({\n            start: horizonPart.start,\n            end: horizonPart.end,\n            boundary: useBoundary,\n          });\n          lastBoundary = useBoundary;\n        }\n      }\n      if (horizon[i].start < boundary.y1) {\n        changedHorizon[0].start = boundary.y1;\n        changedHorizon.unshift({\n          start: horizon[i].start,\n          end: boundary.y1,\n          boundary: horizon[i].boundary,\n        });\n      }\n      if (boundary.y2 < horizon[j].end) {\n        changedHorizon[changedHorizon.length - 1].end = boundary.y2;\n        changedHorizon.push({\n          start: boundary.y2,\n          end: horizon[j].end,\n          boundary: horizon[j].boundary,\n        });\n      }\n\n      // Set x2 new of boundary that is no longer visible (see overlapping case\n      // above).\n      // TODO more efficient, e.g. via reference counting.\n      for (q = i; q <= j; q++) {\n        horizonPart = horizon[q];\n        affectedBoundary = horizonPart.boundary;\n        if (affectedBoundary.x2New !== undefined) {\n          continue;\n        }\n        var used = false;\n        for (\n          k = i - 1;\n          !used && k >= 0 && horizon[k].start >= affectedBoundary.y1;\n          k--\n        ) {\n          used = horizon[k].boundary === affectedBoundary;\n        }\n        for (\n          k = j + 1;\n          !used && k < horizon.length && horizon[k].end <= affectedBoundary.y2;\n          k++\n        ) {\n          used = horizon[k].boundary === affectedBoundary;\n        }\n        for (k = 0; !used && k < changedHorizon.length; k++) {\n          used = changedHorizon[k].boundary === affectedBoundary;\n        }\n        if (!used) {\n          affectedBoundary.x2New = maxXNew;\n        }\n      }\n\n      Array.prototype.splice.apply(\n        horizon,\n        [i, j - i + 1].concat(changedHorizon)\n      );\n    });\n\n    // Set new x2 for all unset boundaries.\n    horizon.forEach(function (horizonPart) {\n      var affectedBoundary = horizonPart.boundary;\n      if (affectedBoundary.x2New === undefined) {\n        affectedBoundary.x2New = Math.max(width, affectedBoundary.x2);\n      }\n    });\n  }\n\n  /**\n   * Text layer rendering task.\n   *\n   * @param {TextContent} textContent\n   * @param {HTMLElement} container\n   * @param {PageViewport} viewport\n   * @param {Array} textDivs\n   * @param {boolean} enhanceTextSelection\n   * @private\n   */\n  function TextLayerRenderTask({\n    textContent,\n    textContentStream,\n    container,\n    viewport,\n    textDivs,\n    textContentItemsStr,\n    enhanceTextSelection,\n  }) {\n    this._textContent = textContent;\n    this._textContentStream = textContentStream;\n    this._container = container;\n    this._viewport = viewport;\n    this._textDivs = textDivs || [];\n    this._textContentItemsStr = textContentItemsStr || [];\n    this._enhanceTextSelection = !!enhanceTextSelection;\n    this._fontInspectorEnabled = !!(\n      globalThis.FontInspector && globalThis.FontInspector.enabled\n    );\n\n    this._reader = null;\n    this._layoutTextLastFontSize = null;\n    this._layoutTextLastFontFamily = null;\n    this._layoutTextCtx = null;\n    this._textDivProperties = new WeakMap();\n    this._renderingDone = false;\n    this._canceled = false;\n    this._capability = createPromiseCapability();\n    this._renderTimer = null;\n    this._bounds = [];\n\n    // Always clean-up the temporary canvas once rendering is no longer pending.\n    this._capability.promise\n      .finally(() => {\n        if (this._layoutTextCtx) {\n          // Zeroing the width and height cause Firefox to release graphics\n          // resources immediately, which can greatly reduce memory consumption.\n          this._layoutTextCtx.canvas.width = 0;\n          this._layoutTextCtx.canvas.height = 0;\n          this._layoutTextCtx = null;\n        }\n      })\n      .catch(() => {\n        /* Avoid \"Uncaught promise\" messages in the console. */\n      });\n  }\n  TextLayerRenderTask.prototype = {\n    get promise() {\n      return this._capability.promise;\n    },\n\n    cancel: function TextLayer_cancel() {\n      this._canceled = true;\n      if (this._reader) {\n        this._reader.cancel(new AbortException(\"TextLayer task cancelled.\"));\n        this._reader = null;\n      }\n      if (this._renderTimer !== null) {\n        clearTimeout(this._renderTimer);\n        this._renderTimer = null;\n      }\n      this._capability.reject(new Error(\"TextLayer task cancelled.\"));\n    },\n\n    _processItems(items, styleCache) {\n      for (let i = 0, len = items.length; i < len; i++) {\n        this._textContentItemsStr.push(items[i].str);\n        appendText(this, items[i], styleCache);\n      }\n    },\n\n    _layoutText(textDiv) {\n      const textDivProperties = this._textDivProperties.get(textDiv);\n      if (textDivProperties.isWhitespace) {\n        return;\n      }\n\n      let transform = \"\";\n      if (textDivProperties.canvasWidth !== 0) {\n        const { fontSize, fontFamily } = textDiv.style;\n\n        // Only build font string and set to context if different from last.\n        if (\n          fontSize !== this._layoutTextLastFontSize ||\n          fontFamily !== this._layoutTextLastFontFamily\n        ) {\n          this._layoutTextCtx.font = `${fontSize} ${fontFamily}`;\n          this._layoutTextLastFontSize = fontSize;\n          this._layoutTextLastFontFamily = fontFamily;\n        }\n        // Only measure the width for multi-char text divs, see `appendText`.\n        const { width } = this._layoutTextCtx.measureText(textDiv.textContent);\n\n        if (width > 0) {\n          textDivProperties.scale = textDivProperties.canvasWidth / width;\n          transform = `scaleX(${textDivProperties.scale})`;\n        }\n      }\n      if (textDivProperties.angle !== 0) {\n        transform = `rotate(${textDivProperties.angle}deg) ${transform}`;\n      }\n      if (transform.length > 0) {\n        if (this._enhanceTextSelection) {\n          textDivProperties.originalTransform = transform;\n        }\n        textDiv.style.transform = transform;\n      }\n      this._textDivProperties.set(textDiv, textDivProperties);\n      this._container.appendChild(textDiv);\n    },\n\n    _render: function TextLayer_render(timeout) {\n      const capability = createPromiseCapability();\n      let styleCache = Object.create(null);\n\n      // The temporary canvas is used to measure text length in the DOM.\n      const canvas = document.createElement(\"canvas\");\n      if (\n        typeof PDFJSDev === \"undefined\" ||\n        PDFJSDev.test(\"MOZCENTRAL || GENERIC\")\n      ) {\n        canvas.mozOpaque = true;\n      }\n      this._layoutTextCtx = canvas.getContext(\"2d\", { alpha: false });\n\n      if (this._textContent) {\n        const textItems = this._textContent.items;\n        const textStyles = this._textContent.styles;\n        this._processItems(textItems, textStyles);\n        capability.resolve();\n      } else if (this._textContentStream) {\n        const pump = () => {\n          this._reader.read().then(({ value, done }) => {\n            if (done) {\n              capability.resolve();\n              return;\n            }\n\n            Object.assign(styleCache, value.styles);\n            this._processItems(value.items, styleCache);\n            pump();\n          }, capability.reject);\n        };\n\n        this._reader = this._textContentStream.getReader();\n        pump();\n      } else {\n        throw new Error(\n          'Neither \"textContent\" nor \"textContentStream\"' +\n            \" parameters specified.\"\n        );\n      }\n\n      capability.promise.then(() => {\n        styleCache = null;\n        if (!timeout) {\n          // Render right away\n          render(this);\n        } else {\n          // Schedule\n          this._renderTimer = setTimeout(() => {\n            render(this);\n            this._renderTimer = null;\n          }, timeout);\n        }\n      }, this._capability.reject);\n    },\n\n    expandTextDivs: function TextLayer_expandTextDivs(expandDivs) {\n      if (!this._enhanceTextSelection || !this._renderingDone) {\n        return;\n      }\n      if (this._bounds !== null) {\n        expand(this);\n        this._bounds = null;\n      }\n      const transformBuf = [],\n        paddingBuf = [];\n\n      for (var i = 0, ii = this._textDivs.length; i < ii; i++) {\n        const div = this._textDivs[i];\n        const divProps = this._textDivProperties.get(div);\n\n        if (divProps.isWhitespace) {\n          continue;\n        }\n        if (expandDivs) {\n          transformBuf.length = 0;\n          paddingBuf.length = 0;\n\n          if (divProps.originalTransform) {\n            transformBuf.push(divProps.originalTransform);\n          }\n          if (divProps.paddingTop > 0) {\n            paddingBuf.push(`${divProps.paddingTop}px`);\n            transformBuf.push(`translateY(${-divProps.paddingTop}px)`);\n          } else {\n            paddingBuf.push(0);\n          }\n          if (divProps.paddingRight > 0) {\n            paddingBuf.push(`${divProps.paddingRight / divProps.scale}px`);\n          } else {\n            paddingBuf.push(0);\n          }\n          if (divProps.paddingBottom > 0) {\n            paddingBuf.push(`${divProps.paddingBottom}px`);\n          } else {\n            paddingBuf.push(0);\n          }\n          if (divProps.paddingLeft > 0) {\n            paddingBuf.push(`${divProps.paddingLeft / divProps.scale}px`);\n            transformBuf.push(\n              `translateX(${-divProps.paddingLeft / divProps.scale}px)`\n            );\n          } else {\n            paddingBuf.push(0);\n          }\n\n          div.style.padding = paddingBuf.join(\" \");\n          if (transformBuf.length) {\n            div.style.transform = transformBuf.join(\" \");\n          }\n        } else {\n          div.style.padding = null;\n          div.style.transform = divProps.originalTransform;\n        }\n      }\n    },\n  };\n\n  /**\n   * Starts rendering of the text layer.\n   *\n   * @param {TextLayerRenderParameters} renderParameters\n   * @returns {TextLayerRenderTask}\n   */\n  // eslint-disable-next-line no-shadow\n  function renderTextLayer(renderParameters) {\n    var task = new TextLayerRenderTask({\n      textContent: renderParameters.textContent,\n      textContentStream: renderParameters.textContentStream,\n      container: renderParameters.container,\n      viewport: renderParameters.viewport,\n      textDivs: renderParameters.textDivs,\n      textContentItemsStr: renderParameters.textContentItemsStr,\n      enhanceTextSelection: renderParameters.enhanceTextSelection,\n    });\n    task._render(renderParameters.timeout);\n    return task;\n  }\n\n  return renderTextLayer;\n})();\n\nexport { renderTextLayer };\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* globals __non_webpack_require__ */\n/* eslint no-var: error */\n\nimport {\n  createObjectURL,\n  FONT_IDENTITY_MATRIX,\n  IDENTITY_MATRIX,\n  ImageKind,\n  isNum,\n  OPS,\n  TextRenderingMode,\n  Util,\n  warn,\n} from \"../shared/util.js\";\nimport { DOMSVGFactory } from \"./display_utils.js\";\nimport { isNodeJS } from \"../shared/is_node.js\";\n\nlet SVGGraphics = function () {\n  throw new Error(\"Not implemented: SVGGraphics\");\n};\n\nif (typeof PDFJSDev === \"undefined\" || PDFJSDev.test(\"GENERIC\")) {\n  const SVG_DEFAULTS = {\n    fontStyle: \"normal\",\n    fontWeight: \"normal\",\n    fillColor: \"#000000\",\n  };\n  const XML_NS = \"http://www.w3.org/XML/1998/namespace\";\n  const XLINK_NS = \"http://www.w3.org/1999/xlink\";\n  const LINE_CAP_STYLES = [\"butt\", \"round\", \"square\"];\n  const LINE_JOIN_STYLES = [\"miter\", \"round\", \"bevel\"];\n\n  const convertImgDataToPng = (function () {\n    const PNG_HEADER = new Uint8Array([\n      0x89,\n      0x50,\n      0x4e,\n      0x47,\n      0x0d,\n      0x0a,\n      0x1a,\n      0x0a,\n    ]);\n    const CHUNK_WRAPPER_SIZE = 12;\n\n    const crcTable = new Int32Array(256);\n    for (let i = 0; i < 256; i++) {\n      let c = i;\n      for (let h = 0; h < 8; h++) {\n        if (c & 1) {\n          c = 0xedb88320 ^ ((c >> 1) & 0x7fffffff);\n        } else {\n          c = (c >> 1) & 0x7fffffff;\n        }\n      }\n      crcTable[i] = c;\n    }\n\n    function crc32(data, start, end) {\n      let crc = -1;\n      for (let i = start; i < end; i++) {\n        const a = (crc ^ data[i]) & 0xff;\n        const b = crcTable[a];\n        crc = (crc >>> 8) ^ b;\n      }\n      return crc ^ -1;\n    }\n\n    function writePngChunk(type, body, data, offset) {\n      let p = offset;\n      const len = body.length;\n\n      data[p] = (len >> 24) & 0xff;\n      data[p + 1] = (len >> 16) & 0xff;\n      data[p + 2] = (len >> 8) & 0xff;\n      data[p + 3] = len & 0xff;\n      p += 4;\n\n      data[p] = type.charCodeAt(0) & 0xff;\n      data[p + 1] = type.charCodeAt(1) & 0xff;\n      data[p + 2] = type.charCodeAt(2) & 0xff;\n      data[p + 3] = type.charCodeAt(3) & 0xff;\n      p += 4;\n\n      data.set(body, p);\n      p += body.length;\n\n      const crc = crc32(data, offset + 4, p);\n      data[p] = (crc >> 24) & 0xff;\n      data[p + 1] = (crc >> 16) & 0xff;\n      data[p + 2] = (crc >> 8) & 0xff;\n      data[p + 3] = crc & 0xff;\n    }\n\n    function adler32(data, start, end) {\n      let a = 1;\n      let b = 0;\n      for (let i = start; i < end; ++i) {\n        a = (a + (data[i] & 0xff)) % 65521;\n        b = (b + a) % 65521;\n      }\n      return (b << 16) | a;\n    }\n\n    /**\n     * @param {Uint8Array} literals The input data.\n     * @returns {Uint8Array} The DEFLATE-compressed data stream in zlib format.\n     *   This is the required format for compressed streams in the PNG format:\n     *   http://www.libpng.org/pub/png/spec/1.2/PNG-Compression.html\n     */\n    function deflateSync(literals) {\n      if (!isNodeJS) {\n        // zlib is certainly not available outside of Node.js. We can either use\n        // the pako library for client-side DEFLATE compression, or use the\n        // canvas API of the browser to obtain a more optimal PNG file.\n        return deflateSyncUncompressed(literals);\n      }\n      try {\n        // NOTE: This implementation is far from perfect, but already way better\n        // than not applying any compression.\n        //\n        // A better algorithm will try to choose a good predictor/filter and\n        // then choose a suitable zlib compression strategy (e.g. 3,Z_RLE).\n        //\n        // Node v0.11.12 zlib.deflateSync is introduced (and returns a Buffer).\n        // Node v3.0.0   Buffer inherits from Uint8Array.\n        // Node v8.0.0   zlib.deflateSync accepts Uint8Array as input.\n        let input;\n        // eslint-disable-next-line no-undef\n        if (parseInt(process.versions.node) >= 8) {\n          input = literals;\n        } else {\n          // eslint-disable-next-line no-undef\n          input = Buffer.from(literals);\n        }\n        const output = __non_webpack_require__(\"zlib\").deflateSync(input, {\n          level: 9,\n        });\n        return output instanceof Uint8Array ? output : new Uint8Array(output);\n      } catch (e) {\n        warn(\n          \"Not compressing PNG because zlib.deflateSync is unavailable: \" + e\n        );\n      }\n\n      return deflateSyncUncompressed(literals);\n    }\n\n    // An implementation of DEFLATE with compression level 0 (Z_NO_COMPRESSION).\n    function deflateSyncUncompressed(literals) {\n      let len = literals.length;\n      const maxBlockLength = 0xffff;\n\n      const deflateBlocks = Math.ceil(len / maxBlockLength);\n      const idat = new Uint8Array(2 + len + deflateBlocks * 5 + 4);\n      let pi = 0;\n      idat[pi++] = 0x78; // compression method and flags\n      idat[pi++] = 0x9c; // flags\n\n      let pos = 0;\n      while (len > maxBlockLength) {\n        // writing non-final DEFLATE blocks type 0 and length of 65535\n        idat[pi++] = 0x00;\n        idat[pi++] = 0xff;\n        idat[pi++] = 0xff;\n        idat[pi++] = 0x00;\n        idat[pi++] = 0x00;\n        idat.set(literals.subarray(pos, pos + maxBlockLength), pi);\n        pi += maxBlockLength;\n        pos += maxBlockLength;\n        len -= maxBlockLength;\n      }\n\n      // writing non-final DEFLATE blocks type 0\n      idat[pi++] = 0x01;\n      idat[pi++] = len & 0xff;\n      idat[pi++] = (len >> 8) & 0xff;\n      idat[pi++] = ~len & 0xffff & 0xff;\n      idat[pi++] = ((~len & 0xffff) >> 8) & 0xff;\n      idat.set(literals.subarray(pos), pi);\n      pi += literals.length - pos;\n\n      const adler = adler32(literals, 0, literals.length); // checksum\n      idat[pi++] = (adler >> 24) & 0xff;\n      idat[pi++] = (adler >> 16) & 0xff;\n      idat[pi++] = (adler >> 8) & 0xff;\n      idat[pi++] = adler & 0xff;\n      return idat;\n    }\n\n    function encode(imgData, kind, forceDataSchema, isMask) {\n      const width = imgData.width;\n      const height = imgData.height;\n      let bitDepth, colorType, lineSize;\n      const bytes = imgData.data;\n\n      switch (kind) {\n        case ImageKind.GRAYSCALE_1BPP:\n          colorType = 0;\n          bitDepth = 1;\n          lineSize = (width + 7) >> 3;\n          break;\n        case ImageKind.RGB_24BPP:\n          colorType = 2;\n          bitDepth = 8;\n          lineSize = width * 3;\n          break;\n        case ImageKind.RGBA_32BPP:\n          colorType = 6;\n          bitDepth = 8;\n          lineSize = width * 4;\n          break;\n        default:\n          throw new Error(\"invalid format\");\n      }\n\n      // prefix every row with predictor 0\n      const literals = new Uint8Array((1 + lineSize) * height);\n      let offsetLiterals = 0,\n        offsetBytes = 0;\n      for (let y = 0; y < height; ++y) {\n        literals[offsetLiterals++] = 0; // no prediction\n        literals.set(\n          bytes.subarray(offsetBytes, offsetBytes + lineSize),\n          offsetLiterals\n        );\n        offsetBytes += lineSize;\n        offsetLiterals += lineSize;\n      }\n\n      if (kind === ImageKind.GRAYSCALE_1BPP && isMask) {\n        // inverting for image masks\n        offsetLiterals = 0;\n        for (let y = 0; y < height; y++) {\n          offsetLiterals++; // skipping predictor\n          for (let i = 0; i < lineSize; i++) {\n            literals[offsetLiterals++] ^= 0xff;\n          }\n        }\n      }\n\n      const ihdr = new Uint8Array([\n        (width >> 24) & 0xff,\n        (width >> 16) & 0xff,\n        (width >> 8) & 0xff,\n        width & 0xff,\n        (height >> 24) & 0xff,\n        (height >> 16) & 0xff,\n        (height >> 8) & 0xff,\n        height & 0xff,\n        bitDepth, // bit depth\n        colorType, // color type\n        0x00, // compression method\n        0x00, // filter method\n        0x00, // interlace method\n      ]);\n      const idat = deflateSync(literals);\n\n      // PNG consists of: header, IHDR+data, IDAT+data, and IEND.\n      const pngLength =\n        PNG_HEADER.length + CHUNK_WRAPPER_SIZE * 3 + ihdr.length + idat.length;\n      const data = new Uint8Array(pngLength);\n      let offset = 0;\n      data.set(PNG_HEADER, offset);\n      offset += PNG_HEADER.length;\n      writePngChunk(\"IHDR\", ihdr, data, offset);\n      offset += CHUNK_WRAPPER_SIZE + ihdr.length;\n      writePngChunk(\"IDATA\", idat, data, offset);\n      offset += CHUNK_WRAPPER_SIZE + idat.length;\n      writePngChunk(\"IEND\", new Uint8Array(0), data, offset);\n\n      return createObjectURL(data, \"image/png\", forceDataSchema);\n    }\n\n    // eslint-disable-next-line no-shadow\n    return function convertImgDataToPng(imgData, forceDataSchema, isMask) {\n      const kind =\n        imgData.kind === undefined ? ImageKind.GRAYSCALE_1BPP : imgData.kind;\n      return encode(imgData, kind, forceDataSchema, isMask);\n    };\n  })();\n\n  class SVGExtraState {\n    constructor() {\n      this.fontSizeScale = 1;\n      this.fontWeight = SVG_DEFAULTS.fontWeight;\n      this.fontSize = 0;\n\n      this.textMatrix = IDENTITY_MATRIX;\n      this.fontMatrix = FONT_IDENTITY_MATRIX;\n      this.leading = 0;\n      this.textRenderingMode = TextRenderingMode.FILL;\n      this.textMatrixScale = 1;\n\n      // Current point (in user coordinates)\n      this.x = 0;\n      this.y = 0;\n\n      // Start of text line (in text coordinates)\n      this.lineX = 0;\n      this.lineY = 0;\n\n      // Character and word spacing\n      this.charSpacing = 0;\n      this.wordSpacing = 0;\n      this.textHScale = 1;\n      this.textRise = 0;\n\n      // Default foreground and background colors\n      this.fillColor = SVG_DEFAULTS.fillColor;\n      this.strokeColor = \"#000000\";\n\n      this.fillAlpha = 1;\n      this.strokeAlpha = 1;\n      this.lineWidth = 1;\n      this.lineJoin = \"\";\n      this.lineCap = \"\";\n      this.miterLimit = 0;\n\n      this.dashArray = [];\n      this.dashPhase = 0;\n\n      this.dependencies = [];\n\n      // Clipping\n      this.activeClipUrl = null;\n      this.clipGroup = null;\n\n      this.maskId = \"\";\n    }\n\n    clone() {\n      return Object.create(this);\n    }\n\n    setCurrentPoint(x, y) {\n      this.x = x;\n      this.y = y;\n    }\n  }\n\n  // eslint-disable-next-line no-inner-declarations\n  function opListToTree(opList) {\n    let opTree = [];\n    const tmp = [];\n\n    for (const opListElement of opList) {\n      if (opListElement.fn === \"save\") {\n        opTree.push({ fnId: 92, fn: \"group\", items: [] });\n        tmp.push(opTree);\n        opTree = opTree[opTree.length - 1].items;\n        continue;\n      }\n\n      if (opListElement.fn === \"restore\") {\n        opTree = tmp.pop();\n      } else {\n        opTree.push(opListElement);\n      }\n    }\n    return opTree;\n  }\n\n  /**\n   * Format a float number as a string.\n   *\n   * @param value {number} - The float number to format.\n   * @returns {string}\n   */\n  // eslint-disable-next-line no-inner-declarations\n  function pf(value) {\n    if (Number.isInteger(value)) {\n      return value.toString();\n    }\n    const s = value.toFixed(10);\n    let i = s.length - 1;\n    if (s[i] !== \"0\") {\n      return s;\n    }\n\n    // Remove trailing zeros.\n    do {\n      i--;\n    } while (s[i] === \"0\");\n    return s.substring(0, s[i] === \".\" ? i : i + 1);\n  }\n\n  /**\n   * Format a transform matrix as a string. The standard rotation, scale and\n   * translation matrices are replaced by their shorter forms, and for\n   * identity matrices an empty string is returned to save memory.\n   *\n   * @param m {Array} - The transform matrix to format.\n   * @returns {string}\n   */\n  // eslint-disable-next-line no-inner-declarations\n  function pm(m) {\n    if (m[4] === 0 && m[5] === 0) {\n      if (m[1] === 0 && m[2] === 0) {\n        if (m[0] === 1 && m[3] === 1) {\n          return \"\";\n        }\n        return `scale(${pf(m[0])} ${pf(m[3])})`;\n      }\n      if (m[0] === m[3] && m[1] === -m[2]) {\n        const a = (Math.acos(m[0]) * 180) / Math.PI;\n        return `rotate(${pf(a)})`;\n      }\n    } else {\n      if (m[0] === 1 && m[1] === 0 && m[2] === 0 && m[3] === 1) {\n        return `translate(${pf(m[4])} ${pf(m[5])})`;\n      }\n    }\n    return (\n      `matrix(${pf(m[0])} ${pf(m[1])} ${pf(m[2])} ${pf(m[3])} ${pf(m[4])} ` +\n      `${pf(m[5])})`\n    );\n  }\n\n  // The counts below are relevant for all pages, so they have to be global\n  // instead of being members of `SVGGraphics` (which is recreated for\n  // each page).\n  let clipCount = 0;\n  let maskCount = 0;\n  let shadingCount = 0;\n\n  // eslint-disable-next-line no-shadow\n  SVGGraphics = class SVGGraphics {\n    constructor(commonObjs, objs, forceDataSchema = false) {\n      this.svgFactory = new DOMSVGFactory();\n\n      this.current = new SVGExtraState();\n      this.transformMatrix = IDENTITY_MATRIX; // Graphics state matrix\n      this.transformStack = [];\n      this.extraStack = [];\n      this.commonObjs = commonObjs;\n      this.objs = objs;\n      this.pendingClip = null;\n      this.pendingEOFill = false;\n\n      this.embedFonts = false;\n      this.embeddedFonts = Object.create(null);\n      this.cssStyle = null;\n      this.forceDataSchema = !!forceDataSchema;\n\n      // In `src/shared/util.js` the operator names are mapped to IDs.\n      // The list below represents the reverse of that, i.e., it maps IDs\n      // to operator names.\n      this._operatorIdMapping = [];\n      for (const op in OPS) {\n        this._operatorIdMapping[OPS[op]] = op;\n      }\n    }\n\n    save() {\n      this.transformStack.push(this.transformMatrix);\n      const old = this.current;\n      this.extraStack.push(old);\n      this.current = old.clone();\n    }\n\n    restore() {\n      this.transformMatrix = this.transformStack.pop();\n      this.current = this.extraStack.pop();\n      this.pendingClip = null;\n      this.tgrp = null;\n    }\n\n    group(items) {\n      this.save();\n      this.executeOpTree(items);\n      this.restore();\n    }\n\n    loadDependencies(operatorList) {\n      const fnArray = operatorList.fnArray;\n      const argsArray = operatorList.argsArray;\n\n      for (let i = 0, ii = fnArray.length; i < ii; i++) {\n        if (fnArray[i] !== OPS.dependency) {\n          continue;\n        }\n\n        for (const obj of argsArray[i]) {\n          const objsPool = obj.startsWith(\"g_\") ? this.commonObjs : this.objs;\n          const promise = new Promise(resolve => {\n            objsPool.get(obj, resolve);\n          });\n          this.current.dependencies.push(promise);\n        }\n      }\n      return Promise.all(this.current.dependencies);\n    }\n\n    transform(a, b, c, d, e, f) {\n      const transformMatrix = [a, b, c, d, e, f];\n      this.transformMatrix = Util.transform(\n        this.transformMatrix,\n        transformMatrix\n      );\n      this.tgrp = null;\n    }\n\n    getSVG(operatorList, viewport) {\n      this.viewport = viewport;\n\n      const svgElement = this._initialize(viewport);\n      return this.loadDependencies(operatorList).then(() => {\n        this.transformMatrix = IDENTITY_MATRIX;\n        this.executeOpTree(this.convertOpList(operatorList));\n        return svgElement;\n      });\n    }\n\n    convertOpList(operatorList) {\n      const operatorIdMapping = this._operatorIdMapping;\n      const argsArray = operatorList.argsArray;\n      const fnArray = operatorList.fnArray;\n      const opList = [];\n      for (let i = 0, ii = fnArray.length; i < ii; i++) {\n        const fnId = fnArray[i];\n        opList.push({\n          fnId,\n          fn: operatorIdMapping[fnId],\n          args: argsArray[i],\n        });\n      }\n      return opListToTree(opList);\n    }\n\n    executeOpTree(opTree) {\n      for (const opTreeElement of opTree) {\n        const fn = opTreeElement.fn;\n        const fnId = opTreeElement.fnId;\n        const args = opTreeElement.args;\n\n        switch (fnId | 0) {\n          case OPS.beginText:\n            this.beginText();\n            break;\n          case OPS.dependency:\n            // Handled in `loadDependencies`, so no warning should be shown.\n            break;\n          case OPS.setLeading:\n            this.setLeading(args);\n            break;\n          case OPS.setLeadingMoveText:\n            this.setLeadingMoveText(args[0], args[1]);\n            break;\n          case OPS.setFont:\n            this.setFont(args);\n            break;\n          case OPS.showText:\n            this.showText(args[0]);\n            break;\n          case OPS.showSpacedText:\n            this.showText(args[0]);\n            break;\n          case OPS.endText:\n            this.endText();\n            break;\n          case OPS.moveText:\n            this.moveText(args[0], args[1]);\n            break;\n          case OPS.setCharSpacing:\n            this.setCharSpacing(args[0]);\n            break;\n          case OPS.setWordSpacing:\n            this.setWordSpacing(args[0]);\n            break;\n          case OPS.setHScale:\n            this.setHScale(args[0]);\n            break;\n          case OPS.setTextMatrix:\n            this.setTextMatrix(\n              args[0],\n              args[1],\n              args[2],\n              args[3],\n              args[4],\n              args[5]\n            );\n            break;\n          case OPS.setTextRise:\n            this.setTextRise(args[0]);\n            break;\n          case OPS.setTextRenderingMode:\n            this.setTextRenderingMode(args[0]);\n            break;\n          case OPS.setLineWidth:\n            this.setLineWidth(args[0]);\n            break;\n          case OPS.setLineJoin:\n            this.setLineJoin(args[0]);\n            break;\n          case OPS.setLineCap:\n            this.setLineCap(args[0]);\n            break;\n          case OPS.setMiterLimit:\n            this.setMiterLimit(args[0]);\n            break;\n          case OPS.setFillRGBColor:\n            this.setFillRGBColor(args[0], args[1], args[2]);\n            break;\n          case OPS.setStrokeRGBColor:\n            this.setStrokeRGBColor(args[0], args[1], args[2]);\n            break;\n          case OPS.setStrokeColorN:\n            this.setStrokeColorN(args);\n            break;\n          case OPS.setFillColorN:\n            this.setFillColorN(args);\n            break;\n          case OPS.shadingFill:\n            this.shadingFill(args[0]);\n            break;\n          case OPS.setDash:\n            this.setDash(args[0], args[1]);\n            break;\n          case OPS.setRenderingIntent:\n            this.setRenderingIntent(args[0]);\n            break;\n          case OPS.setFlatness:\n            this.setFlatness(args[0]);\n            break;\n          case OPS.setGState:\n            this.setGState(args[0]);\n            break;\n          case OPS.fill:\n            this.fill();\n            break;\n          case OPS.eoFill:\n            this.eoFill();\n            break;\n          case OPS.stroke:\n            this.stroke();\n            break;\n          case OPS.fillStroke:\n            this.fillStroke();\n            break;\n          case OPS.eoFillStroke:\n            this.eoFillStroke();\n            break;\n          case OPS.clip:\n            this.clip(\"nonzero\");\n            break;\n          case OPS.eoClip:\n            this.clip(\"evenodd\");\n            break;\n          case OPS.paintSolidColorImageMask:\n            this.paintSolidColorImageMask();\n            break;\n          case OPS.paintImageXObject:\n            this.paintImageXObject(args[0]);\n            break;\n          case OPS.paintInlineImageXObject:\n            this.paintInlineImageXObject(args[0]);\n            break;\n          case OPS.paintImageMaskXObject:\n            this.paintImageMaskXObject(args[0]);\n            break;\n          case OPS.paintFormXObjectBegin:\n            this.paintFormXObjectBegin(args[0], args[1]);\n            break;\n          case OPS.paintFormXObjectEnd:\n            this.paintFormXObjectEnd();\n            break;\n          case OPS.closePath:\n            this.closePath();\n            break;\n          case OPS.closeStroke:\n            this.closeStroke();\n            break;\n          case OPS.closeFillStroke:\n            this.closeFillStroke();\n            break;\n          case OPS.closeEOFillStroke:\n            this.closeEOFillStroke();\n            break;\n          case OPS.nextLine:\n            this.nextLine();\n            break;\n          case OPS.transform:\n            this.transform(\n              args[0],\n              args[1],\n              args[2],\n              args[3],\n              args[4],\n              args[5]\n            );\n            break;\n          case OPS.constructPath:\n            this.constructPath(args[0], args[1]);\n            break;\n          case OPS.endPath:\n            this.endPath();\n            break;\n          case 92:\n            this.group(opTreeElement.items);\n            break;\n          default:\n            warn(`Unimplemented operator ${fn}`);\n            break;\n        }\n      }\n    }\n\n    setWordSpacing(wordSpacing) {\n      this.current.wordSpacing = wordSpacing;\n    }\n\n    setCharSpacing(charSpacing) {\n      this.current.charSpacing = charSpacing;\n    }\n\n    nextLine() {\n      this.moveText(0, this.current.leading);\n    }\n\n    setTextMatrix(a, b, c, d, e, f) {\n      const current = this.current;\n      current.textMatrix = current.lineMatrix = [a, b, c, d, e, f];\n      current.textMatrixScale = Math.sqrt(a * a + b * b);\n\n      current.x = current.lineX = 0;\n      current.y = current.lineY = 0;\n\n      current.xcoords = [];\n      current.ycoords = [];\n      current.tspan = this.svgFactory.createElement(\"svg:tspan\");\n      current.tspan.setAttributeNS(null, \"font-family\", current.fontFamily);\n      current.tspan.setAttributeNS(\n        null,\n        \"font-size\",\n        `${pf(current.fontSize)}px`\n      );\n      current.tspan.setAttributeNS(null, \"y\", pf(-current.y));\n\n      current.txtElement = this.svgFactory.createElement(\"svg:text\");\n      current.txtElement.appendChild(current.tspan);\n    }\n\n    beginText() {\n      const current = this.current;\n      current.x = current.lineX = 0;\n      current.y = current.lineY = 0;\n      current.textMatrix = IDENTITY_MATRIX;\n      current.lineMatrix = IDENTITY_MATRIX;\n      current.textMatrixScale = 1;\n      current.tspan = this.svgFactory.createElement(\"svg:tspan\");\n      current.txtElement = this.svgFactory.createElement(\"svg:text\");\n      current.txtgrp = this.svgFactory.createElement(\"svg:g\");\n      current.xcoords = [];\n      current.ycoords = [];\n    }\n\n    moveText(x, y) {\n      const current = this.current;\n      current.x = current.lineX += x;\n      current.y = current.lineY += y;\n\n      current.xcoords = [];\n      current.ycoords = [];\n      current.tspan = this.svgFactory.createElement(\"svg:tspan\");\n      current.tspan.setAttributeNS(null, \"font-family\", current.fontFamily);\n      current.tspan.setAttributeNS(\n        null,\n        \"font-size\",\n        `${pf(current.fontSize)}px`\n      );\n      current.tspan.setAttributeNS(null, \"y\", pf(-current.y));\n    }\n\n    showText(glyphs) {\n      const current = this.current;\n      const font = current.font;\n      const fontSize = current.fontSize;\n      if (fontSize === 0) {\n        return;\n      }\n\n      const fontSizeScale = current.fontSizeScale;\n      const charSpacing = current.charSpacing;\n      const wordSpacing = current.wordSpacing;\n      const fontDirection = current.fontDirection;\n      const textHScale = current.textHScale * fontDirection;\n      const vertical = font.vertical;\n      const spacingDir = vertical ? 1 : -1;\n      const defaultVMetrics = font.defaultVMetrics;\n      const widthAdvanceScale = fontSize * current.fontMatrix[0];\n\n      let x = 0;\n      for (const glyph of glyphs) {\n        if (glyph === null) {\n          // Word break\n          x += fontDirection * wordSpacing;\n          continue;\n        } else if (isNum(glyph)) {\n          x += (spacingDir * glyph * fontSize) / 1000;\n          continue;\n        }\n\n        const spacing = (glyph.isSpace ? wordSpacing : 0) + charSpacing;\n        const character = glyph.fontChar;\n        let scaledX, scaledY;\n        let width = glyph.width;\n        if (vertical) {\n          let vx;\n          const vmetric = glyph.vmetric || defaultVMetrics;\n          vx = glyph.vmetric ? vmetric[1] : width * 0.5;\n          vx = -vx * widthAdvanceScale;\n          const vy = vmetric[2] * widthAdvanceScale;\n\n          width = vmetric ? -vmetric[0] : width;\n          scaledX = vx / fontSizeScale;\n          scaledY = (x + vy) / fontSizeScale;\n        } else {\n          scaledX = x / fontSizeScale;\n          scaledY = 0;\n        }\n\n        if (glyph.isInFont || font.missingFile) {\n          current.xcoords.push(current.x + scaledX);\n          if (vertical) {\n            current.ycoords.push(-current.y + scaledY);\n          }\n          current.tspan.textContent += character;\n        } else {\n          // TODO: To assist with text selection, we should replace the missing\n          // character with a space character if charWidth is not zero.\n          // But we cannot just do \"character = ' '\", because the ' ' character\n          // might actually map to a different glyph.\n        }\n\n        let charWidth;\n        if (vertical) {\n          charWidth = width * widthAdvanceScale - spacing * fontDirection;\n        } else {\n          charWidth = width * widthAdvanceScale + spacing * fontDirection;\n        }\n\n        x += charWidth;\n      }\n      current.tspan.setAttributeNS(\n        null,\n        \"x\",\n        current.xcoords.map(pf).join(\" \")\n      );\n      if (vertical) {\n        current.tspan.setAttributeNS(\n          null,\n          \"y\",\n          current.ycoords.map(pf).join(\" \")\n        );\n      } else {\n        current.tspan.setAttributeNS(null, \"y\", pf(-current.y));\n      }\n\n      if (vertical) {\n        current.y -= x;\n      } else {\n        current.x += x * textHScale;\n      }\n\n      current.tspan.setAttributeNS(null, \"font-family\", current.fontFamily);\n      current.tspan.setAttributeNS(\n        null,\n        \"font-size\",\n        `${pf(current.fontSize)}px`\n      );\n      if (current.fontStyle !== SVG_DEFAULTS.fontStyle) {\n        current.tspan.setAttributeNS(null, \"font-style\", current.fontStyle);\n      }\n      if (current.fontWeight !== SVG_DEFAULTS.fontWeight) {\n        current.tspan.setAttributeNS(null, \"font-weight\", current.fontWeight);\n      }\n\n      const fillStrokeMode =\n        current.textRenderingMode & TextRenderingMode.FILL_STROKE_MASK;\n      if (\n        fillStrokeMode === TextRenderingMode.FILL ||\n        fillStrokeMode === TextRenderingMode.FILL_STROKE\n      ) {\n        if (current.fillColor !== SVG_DEFAULTS.fillColor) {\n          current.tspan.setAttributeNS(null, \"fill\", current.fillColor);\n        }\n        if (current.fillAlpha < 1) {\n          current.tspan.setAttributeNS(null, \"fill-opacity\", current.fillAlpha);\n        }\n      } else if (current.textRenderingMode === TextRenderingMode.ADD_TO_PATH) {\n        // Workaround for Firefox: We must set fill=\"transparent\" because\n        // fill=\"none\" would generate an empty clipping path.\n        current.tspan.setAttributeNS(null, \"fill\", \"transparent\");\n      } else {\n        current.tspan.setAttributeNS(null, \"fill\", \"none\");\n      }\n\n      if (\n        fillStrokeMode === TextRenderingMode.STROKE ||\n        fillStrokeMode === TextRenderingMode.FILL_STROKE\n      ) {\n        const lineWidthScale = 1 / (current.textMatrixScale || 1);\n        this._setStrokeAttributes(current.tspan, lineWidthScale);\n      }\n\n      // Include the text rise in the text matrix since the `pm` function\n      // creates the SVG element's `translate` entry (work on a copy to avoid\n      // altering the original text matrix).\n      let textMatrix = current.textMatrix;\n      if (current.textRise !== 0) {\n        textMatrix = textMatrix.slice();\n        textMatrix[5] += current.textRise;\n      }\n\n      current.txtElement.setAttributeNS(\n        null,\n        \"transform\",\n        `${pm(textMatrix)} scale(${pf(textHScale)}, -1)`\n      );\n      current.txtElement.setAttributeNS(XML_NS, \"xml:space\", \"preserve\");\n      current.txtElement.appendChild(current.tspan);\n      current.txtgrp.appendChild(current.txtElement);\n\n      this._ensureTransformGroup().appendChild(current.txtElement);\n    }\n\n    setLeadingMoveText(x, y) {\n      this.setLeading(-y);\n      this.moveText(x, y);\n    }\n\n    addFontStyle(fontObj) {\n      if (!fontObj.data) {\n        throw new Error(\n          \"addFontStyle: No font data available, \" +\n            'ensure that the \"fontExtraProperties\" API parameter is set.'\n        );\n      }\n      if (!this.cssStyle) {\n        this.cssStyle = this.svgFactory.createElement(\"svg:style\");\n        this.cssStyle.setAttributeNS(null, \"type\", \"text/css\");\n        this.defs.appendChild(this.cssStyle);\n      }\n\n      const url = createObjectURL(\n        fontObj.data,\n        fontObj.mimetype,\n        this.forceDataSchema\n      );\n      this.cssStyle.textContent +=\n        `@font-face { font-family: \"${fontObj.loadedName}\";` +\n        ` src: url(${url}); }\\n`;\n    }\n\n    setFont(details) {\n      const current = this.current;\n      const fontObj = this.commonObjs.get(details[0]);\n      let size = details[1];\n      current.font = fontObj;\n\n      if (\n        this.embedFonts &&\n        !fontObj.missingFile &&\n        !this.embeddedFonts[fontObj.loadedName]\n      ) {\n        this.addFontStyle(fontObj);\n        this.embeddedFonts[fontObj.loadedName] = fontObj;\n      }\n\n      current.fontMatrix = fontObj.fontMatrix\n        ? fontObj.fontMatrix\n        : FONT_IDENTITY_MATRIX;\n\n      let bold = \"normal\";\n      if (fontObj.black) {\n        bold = \"900\";\n      } else if (fontObj.bold) {\n        bold = \"bold\";\n      }\n      const italic = fontObj.italic ? \"italic\" : \"normal\";\n\n      if (size < 0) {\n        size = -size;\n        current.fontDirection = -1;\n      } else {\n        current.fontDirection = 1;\n      }\n      current.fontSize = size;\n      current.fontFamily = fontObj.loadedName;\n      current.fontWeight = bold;\n      current.fontStyle = italic;\n\n      current.tspan = this.svgFactory.createElement(\"svg:tspan\");\n      current.tspan.setAttributeNS(null, \"y\", pf(-current.y));\n      current.xcoords = [];\n      current.ycoords = [];\n    }\n\n    endText() {\n      const current = this.current;\n      if (\n        current.textRenderingMode & TextRenderingMode.ADD_TO_PATH_FLAG &&\n        current.txtElement &&\n        current.txtElement.hasChildNodes()\n      ) {\n        // If no glyphs are shown (i.e. no child nodes), no clipping occurs.\n        current.element = current.txtElement;\n        this.clip(\"nonzero\");\n        this.endPath();\n      }\n    }\n\n    // Path properties\n    setLineWidth(width) {\n      if (width > 0) {\n        this.current.lineWidth = width;\n      }\n    }\n\n    setLineCap(style) {\n      this.current.lineCap = LINE_CAP_STYLES[style];\n    }\n\n    setLineJoin(style) {\n      this.current.lineJoin = LINE_JOIN_STYLES[style];\n    }\n\n    setMiterLimit(limit) {\n      this.current.miterLimit = limit;\n    }\n\n    setStrokeAlpha(strokeAlpha) {\n      this.current.strokeAlpha = strokeAlpha;\n    }\n\n    setStrokeRGBColor(r, g, b) {\n      this.current.strokeColor = Util.makeCssRgb(r, g, b);\n    }\n\n    setFillAlpha(fillAlpha) {\n      this.current.fillAlpha = fillAlpha;\n    }\n\n    setFillRGBColor(r, g, b) {\n      this.current.fillColor = Util.makeCssRgb(r, g, b);\n      this.current.tspan = this.svgFactory.createElement(\"svg:tspan\");\n      this.current.xcoords = [];\n      this.current.ycoords = [];\n    }\n\n    setStrokeColorN(args) {\n      this.current.strokeColor = this._makeColorN_Pattern(args);\n    }\n\n    setFillColorN(args) {\n      this.current.fillColor = this._makeColorN_Pattern(args);\n    }\n\n    shadingFill(args) {\n      const width = this.viewport.width;\n      const height = this.viewport.height;\n      const inv = Util.inverseTransform(this.transformMatrix);\n      const bl = Util.applyTransform([0, 0], inv);\n      const br = Util.applyTransform([0, height], inv);\n      const ul = Util.applyTransform([width, 0], inv);\n      const ur = Util.applyTransform([width, height], inv);\n      const x0 = Math.min(bl[0], br[0], ul[0], ur[0]);\n      const y0 = Math.min(bl[1], br[1], ul[1], ur[1]);\n      const x1 = Math.max(bl[0], br[0], ul[0], ur[0]);\n      const y1 = Math.max(bl[1], br[1], ul[1], ur[1]);\n\n      const rect = this.svgFactory.createElement(\"svg:rect\");\n      rect.setAttributeNS(null, \"x\", x0);\n      rect.setAttributeNS(null, \"y\", y0);\n      rect.setAttributeNS(null, \"width\", x1 - x0);\n      rect.setAttributeNS(null, \"height\", y1 - y0);\n      rect.setAttributeNS(null, \"fill\", this._makeShadingPattern(args));\n      if (this.current.fillAlpha < 1) {\n        rect.setAttributeNS(null, \"fill-opacity\", this.current.fillAlpha);\n      }\n      this._ensureTransformGroup().appendChild(rect);\n    }\n\n    /**\n     * @private\n     */\n    _makeColorN_Pattern(args) {\n      if (args[0] === \"TilingPattern\") {\n        return this._makeTilingPattern(args);\n      }\n      return this._makeShadingPattern(args);\n    }\n\n    /**\n     * @private\n     */\n    _makeTilingPattern(args) {\n      const color = args[1];\n      const operatorList = args[2];\n      const matrix = args[3] || IDENTITY_MATRIX;\n      const [x0, y0, x1, y1] = args[4];\n      const xstep = args[5];\n      const ystep = args[6];\n      const paintType = args[7];\n\n      const tilingId = `shading${shadingCount++}`;\n      const [tx0, ty0] = Util.applyTransform([x0, y0], matrix);\n      const [tx1, ty1] = Util.applyTransform([x1, y1], matrix);\n      const [xscale, yscale] = Util.singularValueDecompose2dScale(matrix);\n      const txstep = xstep * xscale;\n      const tystep = ystep * yscale;\n\n      const tiling = this.svgFactory.createElement(\"svg:pattern\");\n      tiling.setAttributeNS(null, \"id\", tilingId);\n      tiling.setAttributeNS(null, \"patternUnits\", \"userSpaceOnUse\");\n      tiling.setAttributeNS(null, \"width\", txstep);\n      tiling.setAttributeNS(null, \"height\", tystep);\n      tiling.setAttributeNS(null, \"x\", `${tx0}`);\n      tiling.setAttributeNS(null, \"y\", `${ty0}`);\n\n      // Save current state.\n      const svg = this.svg;\n      const transformMatrix = this.transformMatrix;\n      const fillColor = this.current.fillColor;\n      const strokeColor = this.current.strokeColor;\n\n      const bbox = this.svgFactory.create(tx1 - tx0, ty1 - ty0);\n      this.svg = bbox;\n      this.transformMatrix = matrix;\n      if (paintType === 2) {\n        const cssColor = Util.makeCssRgb(...color);\n        this.current.fillColor = cssColor;\n        this.current.strokeColor = cssColor;\n      }\n      this.executeOpTree(this.convertOpList(operatorList));\n\n      // Restore saved state.\n      this.svg = svg;\n      this.transformMatrix = transformMatrix;\n      this.current.fillColor = fillColor;\n      this.current.strokeColor = strokeColor;\n\n      tiling.appendChild(bbox.childNodes[0]);\n      this.defs.appendChild(tiling);\n      return `url(#${tilingId})`;\n    }\n\n    /**\n     * @private\n     */\n    _makeShadingPattern(args) {\n      switch (args[0]) {\n        case \"RadialAxial\":\n          const shadingId = `shading${shadingCount++}`;\n          const colorStops = args[3];\n          let gradient;\n\n          switch (args[1]) {\n            case \"axial\":\n              const point0 = args[4];\n              const point1 = args[5];\n              gradient = this.svgFactory.createElement(\"svg:linearGradient\");\n              gradient.setAttributeNS(null, \"id\", shadingId);\n              gradient.setAttributeNS(null, \"gradientUnits\", \"userSpaceOnUse\");\n              gradient.setAttributeNS(null, \"x1\", point0[0]);\n              gradient.setAttributeNS(null, \"y1\", point0[1]);\n              gradient.setAttributeNS(null, \"x2\", point1[0]);\n              gradient.setAttributeNS(null, \"y2\", point1[1]);\n              break;\n            case \"radial\":\n              const focalPoint = args[4];\n              const circlePoint = args[5];\n              const focalRadius = args[6];\n              const circleRadius = args[7];\n              gradient = this.svgFactory.createElement(\"svg:radialGradient\");\n              gradient.setAttributeNS(null, \"id\", shadingId);\n              gradient.setAttributeNS(null, \"gradientUnits\", \"userSpaceOnUse\");\n              gradient.setAttributeNS(null, \"cx\", circlePoint[0]);\n              gradient.setAttributeNS(null, \"cy\", circlePoint[1]);\n              gradient.setAttributeNS(null, \"r\", circleRadius);\n              gradient.setAttributeNS(null, \"fx\", focalPoint[0]);\n              gradient.setAttributeNS(null, \"fy\", focalPoint[1]);\n              gradient.setAttributeNS(null, \"fr\", focalRadius);\n              break;\n            default:\n              throw new Error(`Unknown RadialAxial type: ${args[1]}`);\n          }\n          for (const colorStop of colorStops) {\n            const stop = this.svgFactory.createElement(\"svg:stop\");\n            stop.setAttributeNS(null, \"offset\", colorStop[0]);\n            stop.setAttributeNS(null, \"stop-color\", colorStop[1]);\n            gradient.appendChild(stop);\n          }\n          this.defs.appendChild(gradient);\n          return `url(#${shadingId})`;\n        case \"Mesh\":\n          warn(\"Unimplemented pattern Mesh\");\n          return null;\n        case \"Dummy\":\n          return \"hotpink\";\n        default:\n          throw new Error(`Unknown IR type: ${args[0]}`);\n      }\n    }\n\n    setDash(dashArray, dashPhase) {\n      this.current.dashArray = dashArray;\n      this.current.dashPhase = dashPhase;\n    }\n\n    constructPath(ops, args) {\n      const current = this.current;\n      let x = current.x,\n        y = current.y;\n      let d = [];\n      let j = 0;\n\n      for (const op of ops) {\n        switch (op | 0) {\n          case OPS.rectangle:\n            x = args[j++];\n            y = args[j++];\n            const width = args[j++];\n            const height = args[j++];\n            const xw = x + width;\n            const yh = y + height;\n            d.push(\n              \"M\",\n              pf(x),\n              pf(y),\n              \"L\",\n              pf(xw),\n              pf(y),\n              \"L\",\n              pf(xw),\n              pf(yh),\n              \"L\",\n              pf(x),\n              pf(yh),\n              \"Z\"\n            );\n            break;\n          case OPS.moveTo:\n            x = args[j++];\n            y = args[j++];\n            d.push(\"M\", pf(x), pf(y));\n            break;\n          case OPS.lineTo:\n            x = args[j++];\n            y = args[j++];\n            d.push(\"L\", pf(x), pf(y));\n            break;\n          case OPS.curveTo:\n            x = args[j + 4];\n            y = args[j + 5];\n            d.push(\n              \"C\",\n              pf(args[j]),\n              pf(args[j + 1]),\n              pf(args[j + 2]),\n              pf(args[j + 3]),\n              pf(x),\n              pf(y)\n            );\n            j += 6;\n            break;\n          case OPS.curveTo2:\n            d.push(\n              \"C\",\n              pf(x),\n              pf(y),\n              pf(args[j]),\n              pf(args[j + 1]),\n              pf(args[j + 2]),\n              pf(args[j + 3])\n            );\n            x = args[j + 2];\n            y = args[j + 3];\n            j += 4;\n            break;\n          case OPS.curveTo3:\n            x = args[j + 2];\n            y = args[j + 3];\n            d.push(\n              \"C\",\n              pf(args[j]),\n              pf(args[j + 1]),\n              pf(x),\n              pf(y),\n              pf(x),\n              pf(y)\n            );\n            j += 4;\n            break;\n          case OPS.closePath:\n            d.push(\"Z\");\n            break;\n        }\n      }\n\n      d = d.join(\" \");\n\n      if (\n        current.path &&\n        ops.length > 0 &&\n        ops[0] !== OPS.rectangle &&\n        ops[0] !== OPS.moveTo\n      ) {\n        // If a path does not start with an OPS.rectangle or OPS.moveTo, it has\n        // probably been divided into two OPS.constructPath operators by\n        // OperatorList. Append the commands to the previous path element.\n        d = current.path.getAttributeNS(null, \"d\") + d;\n      } else {\n        current.path = this.svgFactory.createElement(\"svg:path\");\n        this._ensureTransformGroup().appendChild(current.path);\n      }\n\n      current.path.setAttributeNS(null, \"d\", d);\n      current.path.setAttributeNS(null, \"fill\", \"none\");\n\n      // Saving a reference in current.element so that it can be addressed\n      // in 'fill' and 'stroke'\n      current.element = current.path;\n      current.setCurrentPoint(x, y);\n    }\n\n    endPath() {\n      const current = this.current;\n\n      // Painting operators end a path.\n      current.path = null;\n\n      if (!this.pendingClip) {\n        return;\n      }\n      if (!current.element) {\n        this.pendingClip = null;\n        return;\n      }\n\n      // Add the current path to a clipping path.\n      const clipId = `clippath${clipCount++}`;\n      const clipPath = this.svgFactory.createElement(\"svg:clipPath\");\n      clipPath.setAttributeNS(null, \"id\", clipId);\n      clipPath.setAttributeNS(null, \"transform\", pm(this.transformMatrix));\n\n      // A deep clone is needed when text is used as a clipping path.\n      const clipElement = current.element.cloneNode(true);\n      if (this.pendingClip === \"evenodd\") {\n        clipElement.setAttributeNS(null, \"clip-rule\", \"evenodd\");\n      } else {\n        clipElement.setAttributeNS(null, \"clip-rule\", \"nonzero\");\n      }\n      this.pendingClip = null;\n      clipPath.appendChild(clipElement);\n      this.defs.appendChild(clipPath);\n\n      if (current.activeClipUrl) {\n        // The previous clipping group content can go out of order -- resetting\n        // cached clipGroups.\n        current.clipGroup = null;\n        this.extraStack.forEach(function (prev) {\n          prev.clipGroup = null;\n        });\n        // Intersect with the previous clipping path.\n        clipPath.setAttributeNS(null, \"clip-path\", current.activeClipUrl);\n      }\n      current.activeClipUrl = `url(#${clipId})`;\n\n      this.tgrp = null;\n    }\n\n    clip(type) {\n      this.pendingClip = type;\n    }\n\n    closePath() {\n      const current = this.current;\n      if (current.path) {\n        const d = `${current.path.getAttributeNS(null, \"d\")}Z`;\n        current.path.setAttributeNS(null, \"d\", d);\n      }\n    }\n\n    setLeading(leading) {\n      this.current.leading = -leading;\n    }\n\n    setTextRise(textRise) {\n      this.current.textRise = textRise;\n    }\n\n    setTextRenderingMode(textRenderingMode) {\n      this.current.textRenderingMode = textRenderingMode;\n    }\n\n    setHScale(scale) {\n      this.current.textHScale = scale / 100;\n    }\n\n    setRenderingIntent(intent) {\n      // This operation is ignored since we haven't found a use case for it yet.\n    }\n\n    setFlatness(flatness) {\n      // This operation is ignored since we haven't found a use case for it yet.\n    }\n\n    setGState(states) {\n      for (const [key, value] of states) {\n        switch (key) {\n          case \"LW\":\n            this.setLineWidth(value);\n            break;\n          case \"LC\":\n            this.setLineCap(value);\n            break;\n          case \"LJ\":\n            this.setLineJoin(value);\n            break;\n          case \"ML\":\n            this.setMiterLimit(value);\n            break;\n          case \"D\":\n            this.setDash(value[0], value[1]);\n            break;\n          case \"RI\":\n            this.setRenderingIntent(value);\n            break;\n          case \"FL\":\n            this.setFlatness(value);\n            break;\n          case \"Font\":\n            this.setFont(value);\n            break;\n          case \"CA\":\n            this.setStrokeAlpha(value);\n            break;\n          case \"ca\":\n            this.setFillAlpha(value);\n            break;\n          default:\n            warn(`Unimplemented graphic state operator ${key}`);\n            break;\n        }\n      }\n    }\n\n    fill() {\n      const current = this.current;\n      if (current.element) {\n        current.element.setAttributeNS(null, \"fill\", current.fillColor);\n        current.element.setAttributeNS(null, \"fill-opacity\", current.fillAlpha);\n        this.endPath();\n      }\n    }\n\n    stroke() {\n      const current = this.current;\n      if (current.element) {\n        this._setStrokeAttributes(current.element);\n        current.element.setAttributeNS(null, \"fill\", \"none\");\n        this.endPath();\n      }\n    }\n\n    /**\n     * @private\n     */\n    _setStrokeAttributes(element, lineWidthScale = 1) {\n      const current = this.current;\n      let dashArray = current.dashArray;\n      if (lineWidthScale !== 1 && dashArray.length > 0) {\n        dashArray = dashArray.map(function (value) {\n          return lineWidthScale * value;\n        });\n      }\n      element.setAttributeNS(null, \"stroke\", current.strokeColor);\n      element.setAttributeNS(null, \"stroke-opacity\", current.strokeAlpha);\n      element.setAttributeNS(null, \"stroke-miterlimit\", pf(current.miterLimit));\n      element.setAttributeNS(null, \"stroke-linecap\", current.lineCap);\n      element.setAttributeNS(null, \"stroke-linejoin\", current.lineJoin);\n      element.setAttributeNS(\n        null,\n        \"stroke-width\",\n        pf(lineWidthScale * current.lineWidth) + \"px\"\n      );\n      element.setAttributeNS(\n        null,\n        \"stroke-dasharray\",\n        dashArray.map(pf).join(\" \")\n      );\n      element.setAttributeNS(\n        null,\n        \"stroke-dashoffset\",\n        pf(lineWidthScale * current.dashPhase) + \"px\"\n      );\n    }\n\n    eoFill() {\n      if (this.current.element) {\n        this.current.element.setAttributeNS(null, \"fill-rule\", \"evenodd\");\n      }\n      this.fill();\n    }\n\n    fillStroke() {\n      // Order is important since stroke wants fill to be none.\n      // First stroke, then if fill needed, it will be overwritten.\n      this.stroke();\n      this.fill();\n    }\n\n    eoFillStroke() {\n      if (this.current.element) {\n        this.current.element.setAttributeNS(null, \"fill-rule\", \"evenodd\");\n      }\n      this.fillStroke();\n    }\n\n    closeStroke() {\n      this.closePath();\n      this.stroke();\n    }\n\n    closeFillStroke() {\n      this.closePath();\n      this.fillStroke();\n    }\n\n    closeEOFillStroke() {\n      this.closePath();\n      this.eoFillStroke();\n    }\n\n    paintSolidColorImageMask() {\n      const rect = this.svgFactory.createElement(\"svg:rect\");\n      rect.setAttributeNS(null, \"x\", \"0\");\n      rect.setAttributeNS(null, \"y\", \"0\");\n      rect.setAttributeNS(null, \"width\", \"1px\");\n      rect.setAttributeNS(null, \"height\", \"1px\");\n      rect.setAttributeNS(null, \"fill\", this.current.fillColor);\n\n      this._ensureTransformGroup().appendChild(rect);\n    }\n\n    paintImageXObject(objId) {\n      const imgData = this.objs.get(objId);\n      if (!imgData) {\n        warn(`Dependent image with object ID ${objId} is not ready yet`);\n        return;\n      }\n      this.paintInlineImageXObject(imgData);\n    }\n\n    paintInlineImageXObject(imgData, mask) {\n      const width = imgData.width;\n      const height = imgData.height;\n\n      const imgSrc = convertImgDataToPng(imgData, this.forceDataSchema, !!mask);\n      const cliprect = this.svgFactory.createElement(\"svg:rect\");\n      cliprect.setAttributeNS(null, \"x\", \"0\");\n      cliprect.setAttributeNS(null, \"y\", \"0\");\n      cliprect.setAttributeNS(null, \"width\", pf(width));\n      cliprect.setAttributeNS(null, \"height\", pf(height));\n      this.current.element = cliprect;\n      this.clip(\"nonzero\");\n\n      const imgEl = this.svgFactory.createElement(\"svg:image\");\n      imgEl.setAttributeNS(XLINK_NS, \"xlink:href\", imgSrc);\n      imgEl.setAttributeNS(null, \"x\", \"0\");\n      imgEl.setAttributeNS(null, \"y\", pf(-height));\n      imgEl.setAttributeNS(null, \"width\", pf(width) + \"px\");\n      imgEl.setAttributeNS(null, \"height\", pf(height) + \"px\");\n      imgEl.setAttributeNS(\n        null,\n        \"transform\",\n        `scale(${pf(1 / width)} ${pf(-1 / height)})`\n      );\n      if (mask) {\n        mask.appendChild(imgEl);\n      } else {\n        this._ensureTransformGroup().appendChild(imgEl);\n      }\n    }\n\n    paintImageMaskXObject(imgData) {\n      const current = this.current;\n      const width = imgData.width;\n      const height = imgData.height;\n      const fillColor = current.fillColor;\n\n      current.maskId = `mask${maskCount++}`;\n      const mask = this.svgFactory.createElement(\"svg:mask\");\n      mask.setAttributeNS(null, \"id\", current.maskId);\n\n      const rect = this.svgFactory.createElement(\"svg:rect\");\n      rect.setAttributeNS(null, \"x\", \"0\");\n      rect.setAttributeNS(null, \"y\", \"0\");\n      rect.setAttributeNS(null, \"width\", pf(width));\n      rect.setAttributeNS(null, \"height\", pf(height));\n      rect.setAttributeNS(null, \"fill\", fillColor);\n      rect.setAttributeNS(null, \"mask\", `url(#${current.maskId})`);\n\n      this.defs.appendChild(mask);\n      this._ensureTransformGroup().appendChild(rect);\n\n      this.paintInlineImageXObject(imgData, mask);\n    }\n\n    paintFormXObjectBegin(matrix, bbox) {\n      if (Array.isArray(matrix) && matrix.length === 6) {\n        this.transform(\n          matrix[0],\n          matrix[1],\n          matrix[2],\n          matrix[3],\n          matrix[4],\n          matrix[5]\n        );\n      }\n\n      if (bbox) {\n        const width = bbox[2] - bbox[0];\n        const height = bbox[3] - bbox[1];\n\n        const cliprect = this.svgFactory.createElement(\"svg:rect\");\n        cliprect.setAttributeNS(null, \"x\", bbox[0]);\n        cliprect.setAttributeNS(null, \"y\", bbox[1]);\n        cliprect.setAttributeNS(null, \"width\", pf(width));\n        cliprect.setAttributeNS(null, \"height\", pf(height));\n        this.current.element = cliprect;\n        this.clip(\"nonzero\");\n        this.endPath();\n      }\n    }\n\n    paintFormXObjectEnd() {}\n\n    /**\n     * @private\n     */\n    _initialize(viewport) {\n      const svg = this.svgFactory.create(viewport.width, viewport.height);\n\n      // Create the definitions element.\n      const definitions = this.svgFactory.createElement(\"svg:defs\");\n      svg.appendChild(definitions);\n      this.defs = definitions;\n\n      // Create the root group element, which acts a container for all other\n      // groups and applies the viewport transform.\n      const rootGroup = this.svgFactory.createElement(\"svg:g\");\n      rootGroup.setAttributeNS(null, \"transform\", pm(viewport.transform));\n      svg.appendChild(rootGroup);\n\n      // For the construction of the SVG image we are only interested in the\n      // root group, so we expose it as the entry point of the SVG image for\n      // the other code in this class.\n      this.svg = rootGroup;\n\n      return svg;\n    }\n\n    /**\n     * @private\n     */\n    _ensureClipGroup() {\n      if (!this.current.clipGroup) {\n        const clipGroup = this.svgFactory.createElement(\"svg:g\");\n        clipGroup.setAttributeNS(null, \"clip-path\", this.current.activeClipUrl);\n        this.svg.appendChild(clipGroup);\n        this.current.clipGroup = clipGroup;\n      }\n      return this.current.clipGroup;\n    }\n\n    /**\n     * @private\n     */\n    _ensureTransformGroup() {\n      if (!this.tgrp) {\n        this.tgrp = this.svgFactory.createElement(\"svg:g\");\n        this.tgrp.setAttributeNS(null, \"transform\", pm(this.transformMatrix));\n        if (this.current.activeClipUrl) {\n          this._ensureClipGroup().appendChild(this.tgrp);\n        } else {\n          this.svg.appendChild(this.tgrp);\n        }\n      }\n      return this.tgrp;\n    }\n  };\n}\n\nexport { SVGGraphics };\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* globals __non_webpack_require__ */\n\nimport {\n  AbortException,\n  assert,\n  createPromiseCapability,\n  MissingPDFException,\n} from \"../shared/util.js\";\nimport {\n  extractFilenameFromHeader,\n  validateRangeRequestCapabilities,\n} from \"./network_utils.js\";\n\nif (typeof PDFJSDev !== \"undefined\" && PDFJSDev.test(\"MOZCENTRAL\")) {\n  throw new Error(\n    'Module \"./node_stream.js\" shall not be used with MOZCENTRAL builds.'\n  );\n}\n\nconst fs = __non_webpack_require__(\"fs\");\nconst http = __non_webpack_require__(\"http\");\nconst https = __non_webpack_require__(\"https\");\nconst url = __non_webpack_require__(\"url\");\n\nconst fileUriRegex = /^file:\\/\\/\\/[a-zA-Z]:\\//;\n\nfunction parseUrl(sourceUrl) {\n  const parsedUrl = url.parse(sourceUrl);\n  if (parsedUrl.protocol === \"file:\" || parsedUrl.host) {\n    return parsedUrl;\n  }\n  // Prepending 'file:///' to Windows absolute path.\n  if (/^[a-z]:[/\\\\]/i.test(sourceUrl)) {\n    return url.parse(`file:///${sourceUrl}`);\n  }\n  // Changes protocol to 'file:' if url refers to filesystem.\n  if (!parsedUrl.host) {\n    parsedUrl.protocol = \"file:\";\n  }\n  return parsedUrl;\n}\n\nclass PDFNodeStream {\n  constructor(source) {\n    this.source = source;\n    this.url = parseUrl(source.url);\n    this.isHttp =\n      this.url.protocol === \"http:\" || this.url.protocol === \"https:\";\n    // Check if url refers to filesystem.\n    this.isFsUrl = this.url.protocol === \"file:\";\n    this.httpHeaders = (this.isHttp && source.httpHeaders) || {};\n\n    this._fullRequestReader = null;\n    this._rangeRequestReaders = [];\n  }\n\n  get _progressiveDataLength() {\n    return this._fullRequestReader ? this._fullRequestReader._loaded : 0;\n  }\n\n  getFullReader() {\n    assert(\n      !this._fullRequestReader,\n      \"PDFNodeStream.getFullReader can only be called once.\"\n    );\n    this._fullRequestReader = this.isFsUrl\n      ? new PDFNodeStreamFsFullReader(this)\n      : new PDFNodeStreamFullReader(this);\n    return this._fullRequestReader;\n  }\n\n  getRangeReader(start, end) {\n    if (end <= this._progressiveDataLength) {\n      return null;\n    }\n    const rangeReader = this.isFsUrl\n      ? new PDFNodeStreamFsRangeReader(this, start, end)\n      : new PDFNodeStreamRangeReader(this, start, end);\n    this._rangeRequestReaders.push(rangeReader);\n    return rangeReader;\n  }\n\n  cancelAllRequests(reason) {\n    if (this._fullRequestReader) {\n      this._fullRequestReader.cancel(reason);\n    }\n\n    const readers = this._rangeRequestReaders.slice(0);\n    readers.forEach(function (reader) {\n      reader.cancel(reason);\n    });\n  }\n}\n\nclass BaseFullReader {\n  constructor(stream) {\n    this._url = stream.url;\n    this._done = false;\n    this._storedError = null;\n    this.onProgress = null;\n    const source = stream.source;\n    this._contentLength = source.length; // optional\n    this._loaded = 0;\n    this._filename = null;\n\n    this._disableRange = source.disableRange || false;\n    this._rangeChunkSize = source.rangeChunkSize;\n    if (!this._rangeChunkSize && !this._disableRange) {\n      this._disableRange = true;\n    }\n\n    this._isStreamingSupported = !source.disableStream;\n    this._isRangeSupported = !source.disableRange;\n\n    this._readableStream = null;\n    this._readCapability = createPromiseCapability();\n    this._headersCapability = createPromiseCapability();\n  }\n\n  get headersReady() {\n    return this._headersCapability.promise;\n  }\n\n  get filename() {\n    return this._filename;\n  }\n\n  get contentLength() {\n    return this._contentLength;\n  }\n\n  get isRangeSupported() {\n    return this._isRangeSupported;\n  }\n\n  get isStreamingSupported() {\n    return this._isStreamingSupported;\n  }\n\n  async read() {\n    await this._readCapability.promise;\n    if (this._done) {\n      return { value: undefined, done: true };\n    }\n    if (this._storedError) {\n      throw this._storedError;\n    }\n\n    const chunk = this._readableStream.read();\n    if (chunk === null) {\n      this._readCapability = createPromiseCapability();\n      return this.read();\n    }\n    this._loaded += chunk.length;\n    if (this.onProgress) {\n      this.onProgress({\n        loaded: this._loaded,\n        total: this._contentLength,\n      });\n    }\n    // Ensure that `read()` method returns ArrayBuffer.\n    const buffer = new Uint8Array(chunk).buffer;\n    return { value: buffer, done: false };\n  }\n\n  cancel(reason) {\n    // Call `this._error()` method when cancel is called\n    // before _readableStream is set.\n    if (!this._readableStream) {\n      this._error(reason);\n      return;\n    }\n    this._readableStream.destroy(reason);\n  }\n\n  _error(reason) {\n    this._storedError = reason;\n    this._readCapability.resolve();\n  }\n\n  _setReadableStream(readableStream) {\n    this._readableStream = readableStream;\n    readableStream.on(\"readable\", () => {\n      this._readCapability.resolve();\n    });\n\n    readableStream.on(\"end\", () => {\n      // Destroy readable to minimize resource usage.\n      readableStream.destroy();\n      this._done = true;\n      this._readCapability.resolve();\n    });\n\n    readableStream.on(\"error\", reason => {\n      this._error(reason);\n    });\n\n    // We need to stop reading when range is supported and streaming is\n    // disabled.\n    if (!this._isStreamingSupported && this._isRangeSupported) {\n      this._error(new AbortException(\"streaming is disabled\"));\n    }\n\n    // Destroy ReadableStream if already in errored state.\n    if (this._storedError) {\n      this._readableStream.destroy(this._storedError);\n    }\n  }\n}\n\nclass BaseRangeReader {\n  constructor(stream) {\n    this._url = stream.url;\n    this._done = false;\n    this._storedError = null;\n    this.onProgress = null;\n    this._loaded = 0;\n    this._readableStream = null;\n    this._readCapability = createPromiseCapability();\n    const source = stream.source;\n    this._isStreamingSupported = !source.disableStream;\n  }\n\n  get isStreamingSupported() {\n    return this._isStreamingSupported;\n  }\n\n  async read() {\n    await this._readCapability.promise;\n    if (this._done) {\n      return { value: undefined, done: true };\n    }\n    if (this._storedError) {\n      throw this._storedError;\n    }\n\n    const chunk = this._readableStream.read();\n    if (chunk === null) {\n      this._readCapability = createPromiseCapability();\n      return this.read();\n    }\n    this._loaded += chunk.length;\n    if (this.onProgress) {\n      this.onProgress({ loaded: this._loaded });\n    }\n    // Ensure that `read()` method returns ArrayBuffer.\n    const buffer = new Uint8Array(chunk).buffer;\n    return { value: buffer, done: false };\n  }\n\n  cancel(reason) {\n    // Call `this._error()` method when cancel is called\n    // before _readableStream is set.\n    if (!this._readableStream) {\n      this._error(reason);\n      return;\n    }\n    this._readableStream.destroy(reason);\n  }\n\n  _error(reason) {\n    this._storedError = reason;\n    this._readCapability.resolve();\n  }\n\n  _setReadableStream(readableStream) {\n    this._readableStream = readableStream;\n    readableStream.on(\"readable\", () => {\n      this._readCapability.resolve();\n    });\n\n    readableStream.on(\"end\", () => {\n      // Destroy readableStream to minimize resource usage.\n      readableStream.destroy();\n      this._done = true;\n      this._readCapability.resolve();\n    });\n\n    readableStream.on(\"error\", reason => {\n      this._error(reason);\n    });\n\n    // Destroy readableStream if already in errored state.\n    if (this._storedError) {\n      this._readableStream.destroy(this._storedError);\n    }\n  }\n}\n\nfunction createRequestOptions(parsedUrl, headers) {\n  return {\n    protocol: parsedUrl.protocol,\n    auth: parsedUrl.auth,\n    host: parsedUrl.hostname,\n    port: parsedUrl.port,\n    path: parsedUrl.path,\n    method: \"GET\",\n    headers,\n  };\n}\n\nclass PDFNodeStreamFullReader extends BaseFullReader {\n  constructor(stream) {\n    super(stream);\n\n    const handleResponse = response => {\n      if (response.statusCode === 404) {\n        const error = new MissingPDFException(`Missing PDF \"${this._url}\".`);\n        this._storedError = error;\n        this._headersCapability.reject(error);\n        return;\n      }\n      this._headersCapability.resolve();\n      this._setReadableStream(response);\n\n      const getResponseHeader = name => {\n        // Make sure that headers name are in lower case, as mentioned\n        // here: https://nodejs.org/api/http.html#http_message_headers.\n        return this._readableStream.headers[name.toLowerCase()];\n      };\n      const {\n        allowRangeRequests,\n        suggestedLength,\n      } = validateRangeRequestCapabilities({\n        getResponseHeader,\n        isHttp: stream.isHttp,\n        rangeChunkSize: this._rangeChunkSize,\n        disableRange: this._disableRange,\n      });\n\n      this._isRangeSupported = allowRangeRequests;\n      // Setting right content length.\n      this._contentLength = suggestedLength || this._contentLength;\n\n      this._filename = extractFilenameFromHeader(getResponseHeader);\n    };\n\n    this._request = null;\n    if (this._url.protocol === \"http:\") {\n      this._request = http.request(\n        createRequestOptions(this._url, stream.httpHeaders),\n        handleResponse\n      );\n    } else {\n      this._request = https.request(\n        createRequestOptions(this._url, stream.httpHeaders),\n        handleResponse\n      );\n    }\n\n    this._request.on(\"error\", reason => {\n      this._storedError = reason;\n      this._headersCapability.reject(reason);\n    });\n    // Note: `request.end(data)` is used to write `data` to request body\n    // and notify end of request. But one should always call `request.end()`\n    // even if there is no data to write -- (to notify the end of request).\n    this._request.end();\n  }\n}\n\nclass PDFNodeStreamRangeReader extends BaseRangeReader {\n  constructor(stream, start, end) {\n    super(stream);\n\n    this._httpHeaders = {};\n    for (const property in stream.httpHeaders) {\n      const value = stream.httpHeaders[property];\n      if (typeof value === \"undefined\") {\n        continue;\n      }\n      this._httpHeaders[property] = value;\n    }\n    this._httpHeaders.Range = `bytes=${start}-${end - 1}`;\n\n    const handleResponse = response => {\n      if (response.statusCode === 404) {\n        const error = new MissingPDFException(`Missing PDF \"${this._url}\".`);\n        this._storedError = error;\n        return;\n      }\n      this._setReadableStream(response);\n    };\n\n    this._request = null;\n    if (this._url.protocol === \"http:\") {\n      this._request = http.request(\n        createRequestOptions(this._url, this._httpHeaders),\n        handleResponse\n      );\n    } else {\n      this._request = https.request(\n        createRequestOptions(this._url, this._httpHeaders),\n        handleResponse\n      );\n    }\n\n    this._request.on(\"error\", reason => {\n      this._storedError = reason;\n    });\n    this._request.end();\n  }\n}\n\nclass PDFNodeStreamFsFullReader extends BaseFullReader {\n  constructor(stream) {\n    super(stream);\n\n    let path = decodeURIComponent(this._url.path);\n\n    // Remove the extra slash to get right path from url like `file:///C:/`\n    if (fileUriRegex.test(this._url.href)) {\n      path = path.replace(/^\\//, \"\");\n    }\n\n    fs.lstat(path, (error, stat) => {\n      if (error) {\n        if (error.code === \"ENOENT\") {\n          error = new MissingPDFException(`Missing PDF \"${path}\".`);\n        }\n        this._storedError = error;\n        this._headersCapability.reject(error);\n        return;\n      }\n      // Setting right content length.\n      this._contentLength = stat.size;\n\n      this._setReadableStream(fs.createReadStream(path));\n      this._headersCapability.resolve();\n    });\n  }\n}\n\nclass PDFNodeStreamFsRangeReader extends BaseRangeReader {\n  constructor(stream, start, end) {\n    super(stream);\n\n    let path = decodeURIComponent(this._url.path);\n\n    // Remove the extra slash to get right path from url like `file:///C:/`\n    if (fileUriRegex.test(this._url.href)) {\n      path = path.replace(/^\\//, \"\");\n    }\n\n    this._setReadableStream(fs.createReadStream(path, { start, end: end - 1 }));\n  }\n}\n\nexport { PDFNodeStream };\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport {\n  assert,\n  MissingPDFException,\n  UnexpectedResponseException,\n} from \"../shared/util.js\";\nimport { getFilenameFromContentDispositionHeader } from \"./content_disposition.js\";\n\nfunction validateRangeRequestCapabilities({\n  getResponseHeader,\n  isHttp,\n  rangeChunkSize,\n  disableRange,\n}) {\n  assert(rangeChunkSize > 0, \"Range chunk size must be larger than zero\");\n  const returnValues = {\n    allowRangeRequests: false,\n    suggestedLength: undefined,\n  };\n\n  const length = parseInt(getResponseHeader(\"Content-Length\"), 10);\n  if (!Number.isInteger(length)) {\n    return returnValues;\n  }\n\n  returnValues.suggestedLength = length;\n\n  if (length <= 2 * rangeChunkSize) {\n    // The file size is smaller than the size of two chunks, so it does not\n    // make any sense to abort the request and retry with a range request.\n    return returnValues;\n  }\n\n  if (disableRange || !isHttp) {\n    return returnValues;\n  }\n  if (getResponseHeader(\"Accept-Ranges\") !== \"bytes\") {\n    return returnValues;\n  }\n\n  const contentEncoding = getResponseHeader(\"Content-Encoding\") || \"identity\";\n  if (contentEncoding !== \"identity\") {\n    return returnValues;\n  }\n\n  returnValues.allowRangeRequests = true;\n  return returnValues;\n}\n\nfunction extractFilenameFromHeader(getResponseHeader) {\n  const contentDisposition = getResponseHeader(\"Content-Disposition\");\n  if (contentDisposition) {\n    let filename = getFilenameFromContentDispositionHeader(contentDisposition);\n    if (filename.includes(\"%\")) {\n      try {\n        filename = decodeURIComponent(filename);\n      } catch (ex) {}\n    }\n    if (/\\.pdf$/i.test(filename)) {\n      return filename;\n    }\n  }\n  return null;\n}\n\nfunction createResponseStatusError(status, url) {\n  if (status === 404 || (status === 0 && url.startsWith(\"file:\"))) {\n    return new MissingPDFException('Missing PDF \"' + url + '\".');\n  }\n  return new UnexpectedResponseException(\n    \"Unexpected server response (\" +\n      status +\n      ') while retrieving PDF \"' +\n      url +\n      '\".',\n    status\n  );\n}\n\nfunction validateResponseStatus(status) {\n  return status === 200 || status === 206;\n}\n\nexport {\n  createResponseStatusError,\n  extractFilenameFromHeader,\n  validateRangeRequestCapabilities,\n  validateResponseStatus,\n};\n","/* Copyright 2017 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n// This getFilenameFromContentDispositionHeader function is adapted from\n// https://github.com/Rob--W/open-in-browser/blob/7e2e35a38b8b4e981b11da7b2f01df0149049e92/extension/content-disposition.js\n// with the following changes:\n// - Modified to conform to PDF.js's coding style.\n// - Support UTF-8 decoding when TextDecoder is unsupported.\n// - Move return to the end of the function to prevent Babel from dropping the\n//   function declarations.\n\n/**\n * Extract file name from the Content-Disposition HTTP response header.\n *\n * @param {string} contentDisposition\n * @returns {string} Filename, if found in the Content-Disposition header.\n */\nfunction getFilenameFromContentDispositionHeader(contentDisposition) {\n  let needsEncodingFixup = true;\n\n  // filename*=ext-value (\"ext-value\" from RFC 5987, referenced by RFC 6266).\n  let tmp = toParamRegExp(\"filename\\\\*\", \"i\").exec(contentDisposition);\n  if (tmp) {\n    tmp = tmp[1];\n    let filename = rfc2616unquote(tmp);\n    filename = unescape(filename);\n    filename = rfc5987decode(filename);\n    filename = rfc2047decode(filename);\n    return fixupEncoding(filename);\n  }\n\n  // Continuations (RFC 2231 section 3, referenced by RFC 5987 section 3.1).\n  // filename*n*=part\n  // filename*n=part\n  tmp = rfc2231getparam(contentDisposition);\n  if (tmp) {\n    // RFC 2047, section\n    const filename = rfc2047decode(tmp);\n    return fixupEncoding(filename);\n  }\n\n  // filename=value (RFC 5987, section 4.1).\n  tmp = toParamRegExp(\"filename\", \"i\").exec(contentDisposition);\n  if (tmp) {\n    tmp = tmp[1];\n    let filename = rfc2616unquote(tmp);\n    filename = rfc2047decode(filename);\n    return fixupEncoding(filename);\n  }\n\n  // After this line there are only function declarations. We cannot put\n  // \"return\" here for readability because babel would then drop the function\n  // declarations...\n  function toParamRegExp(attributePattern, flags) {\n    return new RegExp(\n      \"(?:^|;)\\\\s*\" +\n        attributePattern +\n        \"\\\\s*=\\\\s*\" +\n        // Captures: value = token | quoted-string\n        // (RFC 2616, section 3.6 and referenced by RFC 6266 4.1)\n        \"(\" +\n        '[^\";\\\\s][^;\\\\s]*' +\n        \"|\" +\n        '\"(?:[^\"\\\\\\\\]|\\\\\\\\\"?)+\"?' +\n        \")\",\n      flags\n    );\n  }\n  function textdecode(encoding, value) {\n    if (encoding) {\n      if (!/^[\\x00-\\xFF]+$/.test(value)) {\n        return value;\n      }\n      try {\n        const decoder = new TextDecoder(encoding, { fatal: true });\n        const bytes = Array.from(value, function (ch) {\n          return ch.charCodeAt(0) & 0xff;\n        });\n        value = decoder.decode(new Uint8Array(bytes));\n        needsEncodingFixup = false;\n      } catch (e) {\n        // TextDecoder constructor threw - unrecognized encoding.\n        // Or TextDecoder API is not available (in IE / Edge).\n        if (/^utf-?8$/i.test(encoding)) {\n          // UTF-8 is commonly used, try to support it in another way:\n          try {\n            value = decodeURIComponent(escape(value));\n            needsEncodingFixup = false;\n          } catch (err) {}\n        }\n      }\n    }\n    return value;\n  }\n  function fixupEncoding(value) {\n    if (needsEncodingFixup && /[\\x80-\\xff]/.test(value)) {\n      // Maybe multi-byte UTF-8.\n      value = textdecode(\"utf-8\", value);\n      if (needsEncodingFixup) {\n        // Try iso-8859-1 encoding.\n        value = textdecode(\"iso-8859-1\", value);\n      }\n    }\n    return value;\n  }\n  function rfc2231getparam(contentDispositionStr) {\n    const matches = [];\n    let match;\n    // Iterate over all filename*n= and filename*n*= with n being an integer\n    // of at least zero. Any non-zero number must not start with '0'.\n    const iter = toParamRegExp(\"filename\\\\*((?!0\\\\d)\\\\d+)(\\\\*?)\", \"ig\");\n    while ((match = iter.exec(contentDispositionStr)) !== null) {\n      let [, n, quot, part] = match; // eslint-disable-line prefer-const\n      n = parseInt(n, 10);\n      if (n in matches) {\n        // Ignore anything after the invalid second filename*0.\n        if (n === 0) {\n          break;\n        }\n        continue;\n      }\n      matches[n] = [quot, part];\n    }\n    const parts = [];\n    for (let n = 0; n < matches.length; ++n) {\n      if (!(n in matches)) {\n        // Numbers must be consecutive. Truncate when there is a hole.\n        break;\n      }\n      let [quot, part] = matches[n]; // eslint-disable-line prefer-const\n      part = rfc2616unquote(part);\n      if (quot) {\n        part = unescape(part);\n        if (n === 0) {\n          part = rfc5987decode(part);\n        }\n      }\n      parts.push(part);\n    }\n    return parts.join(\"\");\n  }\n  function rfc2616unquote(value) {\n    if (value.startsWith('\"')) {\n      const parts = value.slice(1).split('\\\\\"');\n      // Find the first unescaped \" and terminate there.\n      for (let i = 0; i < parts.length; ++i) {\n        const quotindex = parts[i].indexOf('\"');\n        if (quotindex !== -1) {\n          parts[i] = parts[i].slice(0, quotindex);\n          parts.length = i + 1; // Truncates and stop the iteration.\n        }\n        parts[i] = parts[i].replace(/\\\\(.)/g, \"$1\");\n      }\n      value = parts.join('\"');\n    }\n    return value;\n  }\n  function rfc5987decode(extvalue) {\n    // Decodes \"ext-value\" from RFC 5987.\n    const encodingend = extvalue.indexOf(\"'\");\n    if (encodingend === -1) {\n      // Some servers send \"filename*=\" without encoding 'language' prefix,\n      // e.g. in https://github.com/Rob--W/open-in-browser/issues/26\n      // Let's accept the value like Firefox (57) (Chrome 62 rejects it).\n      return extvalue;\n    }\n    const encoding = extvalue.slice(0, encodingend);\n    const langvalue = extvalue.slice(encodingend + 1);\n    // Ignore language (RFC 5987 section 3.2.1, and RFC 6266 section 4.1 ).\n    const value = langvalue.replace(/^[^']*'/, \"\");\n    return textdecode(encoding, value);\n  }\n  function rfc2047decode(value) {\n    // RFC 2047-decode the result. Firefox tried to drop support for it, but\n    // backed out because some servers use it - https://bugzil.la/875615\n    // Firefox's condition for decoding is here: https://searchfox.org/mozilla-central/rev/4a590a5a15e35d88a3b23dd6ac3c471cf85b04a8/netwerk/mime/nsMIMEHeaderParamImpl.cpp#742-748\n\n    // We are more strict and only recognize RFC 2047-encoding if the value\n    // starts with \"=?\", since then it is likely that the full value is\n    // RFC 2047-encoded.\n\n    // Firefox also decodes words even where RFC 2047 section 5 states:\n    // \"An 'encoded-word' MUST NOT appear within a 'quoted-string'.\"\n    if (!value.startsWith(\"=?\") || /[\\x00-\\x19\\x80-\\xff]/.test(value)) {\n      return value;\n    }\n    // RFC 2047, section 2.4\n    // encoded-word = \"=?\" charset \"?\" encoding \"?\" encoded-text \"?=\"\n    // charset = token (but let's restrict to characters that denote a\n    //       possibly valid encoding).\n    // encoding = q or b\n    // encoded-text = any printable ASCII character other than ? or space.\n    //        ... but Firefox permits ? and space.\n    return value.replace(\n      /=\\?([\\w-]*)\\?([QqBb])\\?((?:[^?]|\\?(?!=))*)\\?=/g,\n      function (matches, charset, encoding, text) {\n        if (encoding === \"q\" || encoding === \"Q\") {\n          // RFC 2047 section 4.2.\n          text = text.replace(/_/g, \" \");\n          text = text.replace(/=([0-9a-fA-F]{2})/g, function (match, hex) {\n            return String.fromCharCode(parseInt(hex, 16));\n          });\n          return textdecode(charset, text);\n        } // else encoding is b or B - base64 (RFC 2047 section 4.1)\n        try {\n          text = atob(text);\n        } catch (e) {}\n        return textdecode(charset, text);\n      }\n    );\n  }\n\n  return \"\";\n}\n\nexport { getFilenameFromContentDispositionHeader };\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* eslint no-var: error */\n\nimport {\n  assert,\n  createPromiseCapability,\n  stringToBytes,\n} from \"../shared/util.js\";\nimport {\n  createResponseStatusError,\n  extractFilenameFromHeader,\n  validateRangeRequestCapabilities,\n} from \"./network_utils.js\";\n\nif (typeof PDFJSDev !== \"undefined\" && PDFJSDev.test(\"MOZCENTRAL\")) {\n  throw new Error(\n    'Module \"./network.js\" shall not be used with MOZCENTRAL builds.'\n  );\n}\n\nconst OK_RESPONSE = 200;\nconst PARTIAL_CONTENT_RESPONSE = 206;\n\nfunction getArrayBuffer(xhr) {\n  const data = xhr.response;\n  if (typeof data !== \"string\") {\n    return data;\n  }\n  const array = stringToBytes(data);\n  return array.buffer;\n}\n\nclass NetworkManager {\n  constructor(url, args) {\n    this.url = url;\n    args = args || {};\n    this.isHttp = /^https?:/i.test(url);\n    this.httpHeaders = (this.isHttp && args.httpHeaders) || {};\n    this.withCredentials = args.withCredentials || false;\n    this.getXhr =\n      args.getXhr ||\n      function NetworkManager_getXhr() {\n        return new XMLHttpRequest();\n      };\n\n    this.currXhrId = 0;\n    this.pendingRequests = Object.create(null);\n  }\n\n  requestRange(begin, end, listeners) {\n    const args = {\n      begin,\n      end,\n    };\n    for (const prop in listeners) {\n      args[prop] = listeners[prop];\n    }\n    return this.request(args);\n  }\n\n  requestFull(listeners) {\n    return this.request(listeners);\n  }\n\n  request(args) {\n    const xhr = this.getXhr();\n    const xhrId = this.currXhrId++;\n    const pendingRequest = (this.pendingRequests[xhrId] = {\n      xhr,\n    });\n\n    xhr.open(\"GET\", this.url);\n    xhr.withCredentials = this.withCredentials;\n    for (const property in this.httpHeaders) {\n      const value = this.httpHeaders[property];\n      if (typeof value === \"undefined\") {\n        continue;\n      }\n      xhr.setRequestHeader(property, value);\n    }\n    if (this.isHttp && \"begin\" in args && \"end\" in args) {\n      xhr.setRequestHeader(\"Range\", `bytes=${args.begin}-${args.end - 1}`);\n      pendingRequest.expectedStatus = PARTIAL_CONTENT_RESPONSE;\n    } else {\n      pendingRequest.expectedStatus = OK_RESPONSE;\n    }\n    xhr.responseType = \"arraybuffer\";\n\n    if (args.onError) {\n      xhr.onerror = function (evt) {\n        args.onError(xhr.status);\n      };\n    }\n    xhr.onreadystatechange = this.onStateChange.bind(this, xhrId);\n    xhr.onprogress = this.onProgress.bind(this, xhrId);\n\n    pendingRequest.onHeadersReceived = args.onHeadersReceived;\n    pendingRequest.onDone = args.onDone;\n    pendingRequest.onError = args.onError;\n    pendingRequest.onProgress = args.onProgress;\n\n    xhr.send(null);\n\n    return xhrId;\n  }\n\n  onProgress(xhrId, evt) {\n    const pendingRequest = this.pendingRequests[xhrId];\n    if (!pendingRequest) {\n      // Maybe abortRequest was called...\n      return;\n    }\n\n    if (pendingRequest.onProgress) {\n      pendingRequest.onProgress(evt);\n    }\n  }\n\n  onStateChange(xhrId, evt) {\n    const pendingRequest = this.pendingRequests[xhrId];\n    if (!pendingRequest) {\n      // Maybe abortRequest was called...\n      return;\n    }\n\n    const xhr = pendingRequest.xhr;\n    if (xhr.readyState >= 2 && pendingRequest.onHeadersReceived) {\n      pendingRequest.onHeadersReceived();\n      delete pendingRequest.onHeadersReceived;\n    }\n\n    if (xhr.readyState !== 4) {\n      return;\n    }\n\n    if (!(xhrId in this.pendingRequests)) {\n      // The XHR request might have been aborted in onHeadersReceived()\n      // callback, in which case we should abort request.\n      return;\n    }\n\n    delete this.pendingRequests[xhrId];\n\n    // Success status == 0 can be on ftp, file and other protocols.\n    if (xhr.status === 0 && this.isHttp) {\n      if (pendingRequest.onError) {\n        pendingRequest.onError(xhr.status);\n      }\n      return;\n    }\n    const xhrStatus = xhr.status || OK_RESPONSE;\n\n    // From http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.2:\n    // \"A server MAY ignore the Range header\". This means it's possible to\n    // get a 200 rather than a 206 response from a range request.\n    const ok_response_on_range_request =\n      xhrStatus === OK_RESPONSE &&\n      pendingRequest.expectedStatus === PARTIAL_CONTENT_RESPONSE;\n\n    if (\n      !ok_response_on_range_request &&\n      xhrStatus !== pendingRequest.expectedStatus\n    ) {\n      if (pendingRequest.onError) {\n        pendingRequest.onError(xhr.status);\n      }\n      return;\n    }\n\n    const chunk = getArrayBuffer(xhr);\n    if (xhrStatus === PARTIAL_CONTENT_RESPONSE) {\n      const rangeHeader = xhr.getResponseHeader(\"Content-Range\");\n      const matches = /bytes (\\d+)-(\\d+)\\/(\\d+)/.exec(rangeHeader);\n      pendingRequest.onDone({\n        begin: parseInt(matches[1], 10),\n        chunk,\n      });\n    } else if (chunk) {\n      pendingRequest.onDone({\n        begin: 0,\n        chunk,\n      });\n    } else if (pendingRequest.onError) {\n      pendingRequest.onError(xhr.status);\n    }\n  }\n\n  hasPendingRequests() {\n    for (const xhrId in this.pendingRequests) {\n      return true;\n    }\n    return false;\n  }\n\n  getRequestXhr(xhrId) {\n    return this.pendingRequests[xhrId].xhr;\n  }\n\n  isPendingRequest(xhrId) {\n    return xhrId in this.pendingRequests;\n  }\n\n  abortAllRequests() {\n    for (const xhrId in this.pendingRequests) {\n      this.abortRequest(xhrId | 0);\n    }\n  }\n\n  abortRequest(xhrId) {\n    const xhr = this.pendingRequests[xhrId].xhr;\n    delete this.pendingRequests[xhrId];\n    xhr.abort();\n  }\n}\n\n/** @implements {IPDFStream} */\nclass PDFNetworkStream {\n  constructor(source) {\n    this._source = source;\n    this._manager = new NetworkManager(source.url, {\n      httpHeaders: source.httpHeaders,\n      withCredentials: source.withCredentials,\n    });\n    this._rangeChunkSize = source.rangeChunkSize;\n    this._fullRequestReader = null;\n    this._rangeRequestReaders = [];\n  }\n\n  _onRangeRequestReaderClosed(reader) {\n    const i = this._rangeRequestReaders.indexOf(reader);\n    if (i >= 0) {\n      this._rangeRequestReaders.splice(i, 1);\n    }\n  }\n\n  getFullReader() {\n    assert(\n      !this._fullRequestReader,\n      \"PDFNetworkStream.getFullReader can only be called once.\"\n    );\n    this._fullRequestReader = new PDFNetworkStreamFullRequestReader(\n      this._manager,\n      this._source\n    );\n    return this._fullRequestReader;\n  }\n\n  getRangeReader(begin, end) {\n    const reader = new PDFNetworkStreamRangeRequestReader(\n      this._manager,\n      begin,\n      end\n    );\n    reader.onClosed = this._onRangeRequestReaderClosed.bind(this);\n    this._rangeRequestReaders.push(reader);\n    return reader;\n  }\n\n  cancelAllRequests(reason) {\n    if (this._fullRequestReader) {\n      this._fullRequestReader.cancel(reason);\n    }\n    const readers = this._rangeRequestReaders.slice(0);\n    readers.forEach(function (reader) {\n      reader.cancel(reason);\n    });\n  }\n}\n\n/** @implements {IPDFStreamReader} */\nclass PDFNetworkStreamFullRequestReader {\n  constructor(manager, source) {\n    this._manager = manager;\n\n    const args = {\n      onHeadersReceived: this._onHeadersReceived.bind(this),\n      onDone: this._onDone.bind(this),\n      onError: this._onError.bind(this),\n      onProgress: this._onProgress.bind(this),\n    };\n    this._url = source.url;\n    this._fullRequestId = manager.requestFull(args);\n    this._headersReceivedCapability = createPromiseCapability();\n    this._disableRange = source.disableRange || false;\n    this._contentLength = source.length; // Optional\n    this._rangeChunkSize = source.rangeChunkSize;\n    if (!this._rangeChunkSize && !this._disableRange) {\n      this._disableRange = true;\n    }\n\n    this._isStreamingSupported = false;\n    this._isRangeSupported = false;\n\n    this._cachedChunks = [];\n    this._requests = [];\n    this._done = false;\n    this._storedError = undefined;\n    this._filename = null;\n\n    this.onProgress = null;\n  }\n\n  _onHeadersReceived() {\n    const fullRequestXhrId = this._fullRequestId;\n    const fullRequestXhr = this._manager.getRequestXhr(fullRequestXhrId);\n\n    const getResponseHeader = name => {\n      return fullRequestXhr.getResponseHeader(name);\n    };\n    const {\n      allowRangeRequests,\n      suggestedLength,\n    } = validateRangeRequestCapabilities({\n      getResponseHeader,\n      isHttp: this._manager.isHttp,\n      rangeChunkSize: this._rangeChunkSize,\n      disableRange: this._disableRange,\n    });\n\n    if (allowRangeRequests) {\n      this._isRangeSupported = true;\n    }\n    // Setting right content length.\n    this._contentLength = suggestedLength || this._contentLength;\n\n    this._filename = extractFilenameFromHeader(getResponseHeader);\n\n    if (this._isRangeSupported) {\n      // NOTE: by cancelling the full request, and then issuing range\n      // requests, there will be an issue for sites where you can only\n      // request the pdf once. However, if this is the case, then the\n      // server should not be returning that it can support range requests.\n      this._manager.abortRequest(fullRequestXhrId);\n    }\n\n    this._headersReceivedCapability.resolve();\n  }\n\n  _onDone(args) {\n    if (args) {\n      if (this._requests.length > 0) {\n        const requestCapability = this._requests.shift();\n        requestCapability.resolve({ value: args.chunk, done: false });\n      } else {\n        this._cachedChunks.push(args.chunk);\n      }\n    }\n    this._done = true;\n    if (this._cachedChunks.length > 0) {\n      return;\n    }\n    this._requests.forEach(function (requestCapability) {\n      requestCapability.resolve({ value: undefined, done: true });\n    });\n    this._requests = [];\n  }\n\n  _onError(status) {\n    const url = this._url;\n    const exception = createResponseStatusError(status, url);\n    this._storedError = exception;\n    this._headersReceivedCapability.reject(exception);\n    this._requests.forEach(function (requestCapability) {\n      requestCapability.reject(exception);\n    });\n    this._requests = [];\n    this._cachedChunks = [];\n  }\n\n  _onProgress(data) {\n    if (this.onProgress) {\n      this.onProgress({\n        loaded: data.loaded,\n        total: data.lengthComputable ? data.total : this._contentLength,\n      });\n    }\n  }\n\n  get filename() {\n    return this._filename;\n  }\n\n  get isRangeSupported() {\n    return this._isRangeSupported;\n  }\n\n  get isStreamingSupported() {\n    return this._isStreamingSupported;\n  }\n\n  get contentLength() {\n    return this._contentLength;\n  }\n\n  get headersReady() {\n    return this._headersReceivedCapability.promise;\n  }\n\n  async read() {\n    if (this._storedError) {\n      throw this._storedError;\n    }\n    if (this._cachedChunks.length > 0) {\n      const chunk = this._cachedChunks.shift();\n      return { value: chunk, done: false };\n    }\n    if (this._done) {\n      return { value: undefined, done: true };\n    }\n    const requestCapability = createPromiseCapability();\n    this._requests.push(requestCapability);\n    return requestCapability.promise;\n  }\n\n  cancel(reason) {\n    this._done = true;\n    this._headersReceivedCapability.reject(reason);\n    this._requests.forEach(function (requestCapability) {\n      requestCapability.resolve({ value: undefined, done: true });\n    });\n    this._requests = [];\n    if (this._manager.isPendingRequest(this._fullRequestId)) {\n      this._manager.abortRequest(this._fullRequestId);\n    }\n    this._fullRequestReader = null;\n  }\n}\n\n/** @implements {IPDFStreamRangeReader} */\nclass PDFNetworkStreamRangeRequestReader {\n  constructor(manager, begin, end) {\n    this._manager = manager;\n    const args = {\n      onDone: this._onDone.bind(this),\n      onProgress: this._onProgress.bind(this),\n    };\n    this._requestId = manager.requestRange(begin, end, args);\n    this._requests = [];\n    this._queuedChunk = null;\n    this._done = false;\n\n    this.onProgress = null;\n    this.onClosed = null;\n  }\n\n  _close() {\n    if (this.onClosed) {\n      this.onClosed(this);\n    }\n  }\n\n  _onDone(data) {\n    const chunk = data.chunk;\n    if (this._requests.length > 0) {\n      const requestCapability = this._requests.shift();\n      requestCapability.resolve({ value: chunk, done: false });\n    } else {\n      this._queuedChunk = chunk;\n    }\n    this._done = true;\n    this._requests.forEach(function (requestCapability) {\n      requestCapability.resolve({ value: undefined, done: true });\n    });\n    this._requests = [];\n    this._close();\n  }\n\n  _onProgress(evt) {\n    if (!this.isStreamingSupported && this.onProgress) {\n      this.onProgress({\n        loaded: evt.loaded,\n      });\n    }\n  }\n\n  get isStreamingSupported() {\n    return false;\n  }\n\n  async read() {\n    if (this._queuedChunk !== null) {\n      const chunk = this._queuedChunk;\n      this._queuedChunk = null;\n      return { value: chunk, done: false };\n    }\n    if (this._done) {\n      return { value: undefined, done: true };\n    }\n    const requestCapability = createPromiseCapability();\n    this._requests.push(requestCapability);\n    return requestCapability.promise;\n  }\n\n  cancel(reason) {\n    this._done = true;\n    this._requests.forEach(function (requestCapability) {\n      requestCapability.resolve({ value: undefined, done: true });\n    });\n    this._requests = [];\n    if (this._manager.isPendingRequest(this._requestId)) {\n      this._manager.abortRequest(this._requestId);\n    }\n    this._close();\n  }\n}\n\nexport { PDFNetworkStream };\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* eslint no-var: error */\n\nimport {\n  AbortException,\n  assert,\n  createPromiseCapability,\n} from \"../shared/util.js\";\nimport {\n  createResponseStatusError,\n  extractFilenameFromHeader,\n  validateRangeRequestCapabilities,\n  validateResponseStatus,\n} from \"./network_utils.js\";\n\nif (typeof PDFJSDev !== \"undefined\" && PDFJSDev.test(\"MOZCENTRAL\")) {\n  throw new Error(\n    'Module \"./fetch_stream.js\" shall not be used with MOZCENTRAL builds.'\n  );\n}\n\nfunction createFetchOptions(headers, withCredentials, abortController) {\n  return {\n    method: \"GET\",\n    headers,\n    signal: abortController && abortController.signal,\n    mode: \"cors\",\n    credentials: withCredentials ? \"include\" : \"same-origin\",\n    redirect: \"follow\",\n  };\n}\n\nfunction createHeaders(httpHeaders) {\n  const headers = new Headers();\n  for (const property in httpHeaders) {\n    const value = httpHeaders[property];\n    if (typeof value === \"undefined\") {\n      continue;\n    }\n    headers.append(property, value);\n  }\n  return headers;\n}\n\n/** @implements {IPDFStream} */\nclass PDFFetchStream {\n  constructor(source) {\n    this.source = source;\n    this.isHttp = /^https?:/i.test(source.url);\n    this.httpHeaders = (this.isHttp && source.httpHeaders) || {};\n\n    this._fullRequestReader = null;\n    this._rangeRequestReaders = [];\n  }\n\n  get _progressiveDataLength() {\n    return this._fullRequestReader ? this._fullRequestReader._loaded : 0;\n  }\n\n  getFullReader() {\n    assert(\n      !this._fullRequestReader,\n      \"PDFFetchStream.getFullReader can only be called once.\"\n    );\n    this._fullRequestReader = new PDFFetchStreamReader(this);\n    return this._fullRequestReader;\n  }\n\n  getRangeReader(begin, end) {\n    if (end <= this._progressiveDataLength) {\n      return null;\n    }\n    const reader = new PDFFetchStreamRangeReader(this, begin, end);\n    this._rangeRequestReaders.push(reader);\n    return reader;\n  }\n\n  cancelAllRequests(reason) {\n    if (this._fullRequestReader) {\n      this._fullRequestReader.cancel(reason);\n    }\n    const readers = this._rangeRequestReaders.slice(0);\n    readers.forEach(function (reader) {\n      reader.cancel(reason);\n    });\n  }\n}\n\n/** @implements {IPDFStreamReader} */\nclass PDFFetchStreamReader {\n  constructor(stream) {\n    this._stream = stream;\n    this._reader = null;\n    this._loaded = 0;\n    this._filename = null;\n    const source = stream.source;\n    this._withCredentials = source.withCredentials || false;\n    this._contentLength = source.length;\n    this._headersCapability = createPromiseCapability();\n    this._disableRange = source.disableRange || false;\n    this._rangeChunkSize = source.rangeChunkSize;\n    if (!this._rangeChunkSize && !this._disableRange) {\n      this._disableRange = true;\n    }\n\n    if (typeof AbortController !== \"undefined\") {\n      this._abortController = new AbortController();\n    }\n    this._isStreamingSupported = !source.disableStream;\n    this._isRangeSupported = !source.disableRange;\n\n    this._headers = createHeaders(this._stream.httpHeaders);\n\n    const url = source.url;\n    fetch(\n      url,\n      createFetchOptions(\n        this._headers,\n        this._withCredentials,\n        this._abortController\n      )\n    )\n      .then(response => {\n        if (!validateResponseStatus(response.status)) {\n          throw createResponseStatusError(response.status, url);\n        }\n        this._reader = response.body.getReader();\n        this._headersCapability.resolve();\n\n        const getResponseHeader = name => {\n          return response.headers.get(name);\n        };\n        const {\n          allowRangeRequests,\n          suggestedLength,\n        } = validateRangeRequestCapabilities({\n          getResponseHeader,\n          isHttp: this._stream.isHttp,\n          rangeChunkSize: this._rangeChunkSize,\n          disableRange: this._disableRange,\n        });\n\n        this._isRangeSupported = allowRangeRequests;\n        // Setting right content length.\n        this._contentLength = suggestedLength || this._contentLength;\n\n        this._filename = extractFilenameFromHeader(getResponseHeader);\n\n        // We need to stop reading when range is supported and streaming is\n        // disabled.\n        if (!this._isStreamingSupported && this._isRangeSupported) {\n          this.cancel(new AbortException(\"Streaming is disabled.\"));\n        }\n      })\n      .catch(this._headersCapability.reject);\n\n    this.onProgress = null;\n  }\n\n  get headersReady() {\n    return this._headersCapability.promise;\n  }\n\n  get filename() {\n    return this._filename;\n  }\n\n  get contentLength() {\n    return this._contentLength;\n  }\n\n  get isRangeSupported() {\n    return this._isRangeSupported;\n  }\n\n  get isStreamingSupported() {\n    return this._isStreamingSupported;\n  }\n\n  async read() {\n    await this._headersCapability.promise;\n    const { value, done } = await this._reader.read();\n    if (done) {\n      return { value, done };\n    }\n    this._loaded += value.byteLength;\n    if (this.onProgress) {\n      this.onProgress({\n        loaded: this._loaded,\n        total: this._contentLength,\n      });\n    }\n    const buffer = new Uint8Array(value).buffer;\n    return { value: buffer, done: false };\n  }\n\n  cancel(reason) {\n    if (this._reader) {\n      this._reader.cancel(reason);\n    }\n    if (this._abortController) {\n      this._abortController.abort();\n    }\n  }\n}\n\n/** @implements {IPDFStreamRangeReader} */\nclass PDFFetchStreamRangeReader {\n  constructor(stream, begin, end) {\n    this._stream = stream;\n    this._reader = null;\n    this._loaded = 0;\n    const source = stream.source;\n    this._withCredentials = source.withCredentials || false;\n    this._readCapability = createPromiseCapability();\n    this._isStreamingSupported = !source.disableStream;\n\n    if (typeof AbortController !== \"undefined\") {\n      this._abortController = new AbortController();\n    }\n\n    this._headers = createHeaders(this._stream.httpHeaders);\n    this._headers.append(\"Range\", `bytes=${begin}-${end - 1}`);\n\n    const url = source.url;\n    fetch(\n      url,\n      createFetchOptions(\n        this._headers,\n        this._withCredentials,\n        this._abortController\n      )\n    ).then(response => {\n      if (!validateResponseStatus(response.status)) {\n        throw createResponseStatusError(response.status, url);\n      }\n      this._readCapability.resolve();\n      this._reader = response.body.getReader();\n    });\n\n    this.onProgress = null;\n  }\n\n  get isStreamingSupported() {\n    return this._isStreamingSupported;\n  }\n\n  async read() {\n    await this._readCapability.promise;\n    const { value, done } = await this._reader.read();\n    if (done) {\n      return { value, done };\n    }\n    this._loaded += value.byteLength;\n    if (this.onProgress) {\n      this.onProgress({ loaded: this._loaded });\n    }\n    const buffer = new Uint8Array(value).buffer;\n    return { value: buffer, done: false };\n  }\n\n  cancel(reason) {\n    if (this._reader) {\n      this._reader.cancel(reason);\n    }\n    if (this._abortController) {\n      this._abortController.abort();\n    }\n  }\n}\n\nexport { PDFFetchStream };\n","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Delays the emission of items from the source Observable by a given time span\n * determined by the emissions of another Observable.\n *\n * <span class=\"informal\">It's like {@link delay}, but the time span of the\n * delay duration is determined by a second Observable.</span>\n *\n * <img src=\"./img/delayWhen.png\" width=\"100%\">\n *\n * `delayWhen` time shifts each emitted value from the source Observable by a\n * time span determined by another Observable. When the source emits a value,\n * the `delayDurationSelector` function is called with the source value as\n * argument, and should return an Observable, called the \"duration\" Observable.\n * The source value is emitted on the output Observable only when the duration\n * Observable emits a value or completes.\n *\n * Optionally, `delayWhen` takes a second argument, `subscriptionDelay`, which\n * is an Observable. When `subscriptionDelay` emits its first value or\n * completes, the source Observable is subscribed to and starts behaving like\n * described in the previous paragraph. If `subscriptionDelay` is not provided,\n * `delayWhen` will subscribe to the source Observable as soon as the output\n * Observable is subscribed.\n *\n * @example <caption>Delay each click by a random amount of time, between 0 and 5 seconds</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var delayedClicks = clicks.delayWhen(event =>\n *   Rx.Observable.interval(Math.random() * 5000)\n * );\n * delayedClicks.subscribe(x => console.log(x));\n *\n * @see {@link debounce}\n * @see {@link delay}\n *\n * @param {function(value: T): Observable} delayDurationSelector A function that\n * returns an Observable for each value emitted by the source Observable, which\n * is then used to delay the emission of that item on the output Observable\n * until the Observable returned from this function emits a value.\n * @param {Observable} subscriptionDelay An Observable that triggers the\n * subscription to the source Observable once it emits any value.\n * @return {Observable} An Observable that delays the emissions of the source\n * Observable by an amount of time specified by the Observable returned by\n * `delayDurationSelector`.\n * @method delayWhen\n * @owner Observable\n */\nfunction delayWhen(delayDurationSelector, subscriptionDelay) {\n    return operators_1.delayWhen(delayDurationSelector, subscriptionDelay)(this);\n}\nexports.delayWhen = delayWhen;\n//# sourceMappingURL=delayWhen.js.map","export { TestScheduler } from '../internal/testing/TestScheduler';\n//# sourceMappingURL=index.js.map","export { ajax } from '../internal/observable/dom/ajax';\nexport { AjaxResponse, AjaxError, AjaxTimeoutError } from '../internal/observable/dom/AjaxObservable';\n//# sourceMappingURL=index.js.map","import { WebSocketSubject } from './WebSocketSubject';\nexport function webSocket(urlConfigOrSource) {\n    return new WebSocketSubject(urlConfigOrSource);\n}\n//# sourceMappingURL=webSocket.js.map","(function webpackUniversalModuleDefinition(root, factory) {\n\tif(typeof exports === 'object' && typeof module === 'object')\n\t\tmodule.exports = factory();\n\telse if(typeof define === 'function' && define.amd)\n\t\tdefine(\"pdfjs-dist/web/pdf_viewer\", [], factory);\n\telse if(typeof exports === 'object')\n\t\texports[\"pdfjs-dist/web/pdf_viewer\"] = factory();\n\telse\n\t\troot[\"pdfjs-dist/web/pdf_viewer\"] = factory();\n})(this, function() {\nreturn "," \t// The module cache\n \tvar installedModules = {};\n\n \t// The require function\n \tfunction __w_pdfjs_require__(moduleId) {\n\n \t\t// Check if module is in cache\n \t\tif(installedModules[moduleId]) {\n \t\t\treturn installedModules[moduleId].exports;\n \t\t}\n \t\t// Create a new module (and put it into the cache)\n \t\tvar module = installedModules[moduleId] = {\n \t\t\ti: moduleId,\n \t\t\tl: false,\n \t\t\texports: {}\n \t\t};\n\n \t\t// Execute the module function\n \t\tmodules[moduleId].call(module.exports, module, module.exports, __w_pdfjs_require__);\n\n \t\t// Flag the module as loaded\n \t\tmodule.l = true;\n\n \t\t// Return the exports of the module\n \t\treturn module.exports;\n \t}\n\n\n \t// expose the modules object (__webpack_modules__)\n \t__w_pdfjs_require__.m = modules;\n\n \t// expose the module cache\n \t__w_pdfjs_require__.c = installedModules;\n\n \t// define getter function for harmony exports\n \t__w_pdfjs_require__.d = function(exports, name, getter) {\n \t\tif(!__w_pdfjs_require__.o(exports, name)) {\n \t\t\tObject.defineProperty(exports, name, { enumerable: true, get: getter });\n \t\t}\n \t};\n\n \t// define __esModule on exports\n \t__w_pdfjs_require__.r = function(exports) {\n \t\tif(typeof Symbol !== 'undefined' && Symbol.toStringTag) {\n \t\t\tObject.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });\n \t\t}\n \t\tObject.defineProperty(exports, '__esModule', { value: true });\n \t};\n\n \t// create a fake namespace object\n \t// mode & 1: value is a module id, require it\n \t// mode & 2: merge all properties of value into the ns\n \t// mode & 4: return value when already ns object\n \t// mode & 8|1: behave like require\n \t__w_pdfjs_require__.t = function(value, mode) {\n \t\tif(mode & 1) value = __w_pdfjs_require__(value);\n \t\tif(mode & 8) return value;\n \t\tif((mode & 4) && typeof value === 'object' && value && value.__esModule) return value;\n \t\tvar ns = Object.create(null);\n \t\t__w_pdfjs_require__.r(ns);\n \t\tObject.defineProperty(ns, 'default', { enumerable: true, value: value });\n \t\tif(mode & 2 && typeof value != 'string') for(var key in value) __w_pdfjs_require__.d(ns, key, function(key) { return value[key]; }.bind(null, key));\n \t\treturn ns;\n \t};\n\n \t// getDefaultExport function for compatibility with non-harmony modules\n \t__w_pdfjs_require__.n = function(module) {\n \t\tvar getter = module && module.__esModule ?\n \t\t\tfunction getDefault() { return module['default']; } :\n \t\t\tfunction getModuleExports() { return module; };\n \t\t__w_pdfjs_require__.d(getter, 'a', getter);\n \t\treturn getter;\n \t};\n\n \t// Object.prototype.hasOwnProperty.call\n \t__w_pdfjs_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n\n \t// __webpack_public_path__\n \t__w_pdfjs_require__.p = \"\";\n\n\n \t// Load entry module and return exports\n \treturn __w_pdfjs_require__(__w_pdfjs_require__.s = 0);\n","/* Copyright 2014 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport {\n  AnnotationLayerBuilder,\n  DefaultAnnotationLayerFactory,\n} from \"./annotation_layer_builder.js\";\nimport {\n  DefaultTextLayerFactory,\n  TextLayerBuilder,\n} from \"./text_layer_builder.js\";\nimport { EventBus, NullL10n, ProgressBar } from \"./ui_utils.js\";\nimport { PDFLinkService, SimpleLinkService } from \"./pdf_link_service.js\";\nimport { DownloadManager } from \"./download_manager.js\";\nimport { GenericL10n } from \"./genericl10n.js\";\nimport { PDFFindController } from \"./pdf_find_controller.js\";\nimport { PDFHistory } from \"./pdf_history.js\";\nimport { PDFPageView } from \"./pdf_page_view.js\";\nimport { PDFSinglePageViewer } from \"./pdf_single_page_viewer.js\";\nimport { PDFViewer } from \"./pdf_viewer.js\";\n\n// eslint-disable-next-line no-unused-vars\nconst pdfjsVersion = PDFJSDev.eval(\"BUNDLE_VERSION\");\n// eslint-disable-next-line no-unused-vars\nconst pdfjsBuild = PDFJSDev.eval(\"BUNDLE_BUILD\");\n\nexport {\n  PDFViewer,\n  PDFSinglePageViewer,\n  PDFPageView,\n  PDFLinkService,\n  SimpleLinkService,\n  TextLayerBuilder,\n  DefaultTextLayerFactory,\n  AnnotationLayerBuilder,\n  DefaultAnnotationLayerFactory,\n  PDFHistory,\n  PDFFindController,\n  EventBus,\n  DownloadManager,\n  ProgressBar,\n  GenericL10n,\n  NullL10n,\n};\n","/* Copyright 2014 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { AnnotationLayer } from \"pdfjs-lib\";\nimport { NullL10n } from \"./ui_utils.js\";\nimport { SimpleLinkService } from \"./pdf_link_service.js\";\n\n/**\n * @typedef {Object} AnnotationLayerBuilderOptions\n * @property {HTMLDivElement} pageDiv\n * @property {PDFPage} pdfPage\n * @property {string} [imageResourcesPath] - Path for image resources, mainly\n *   for annotation icons. Include trailing slash.\n * @property {boolean} renderInteractiveForms\n * @property {IPDFLinkService} linkService\n * @property {DownloadManager} downloadManager\n * @property {IL10n} l10n - Localization service.\n */\n\nclass AnnotationLayerBuilder {\n  /**\n   * @param {AnnotationLayerBuilderOptions} options\n   */\n  constructor({\n    pageDiv,\n    pdfPage,\n    linkService,\n    downloadManager,\n    imageResourcesPath = \"\",\n    renderInteractiveForms = false,\n    l10n = NullL10n,\n  }) {\n    this.pageDiv = pageDiv;\n    this.pdfPage = pdfPage;\n    this.linkService = linkService;\n    this.downloadManager = downloadManager;\n    this.imageResourcesPath = imageResourcesPath;\n    this.renderInteractiveForms = renderInteractiveForms;\n    this.l10n = l10n;\n\n    this.div = null;\n    this._cancelled = false;\n  }\n\n  /**\n   * @param {PageViewport} viewport\n   * @param {string} intent (default value is 'display')\n   */\n  render(viewport, intent = \"display\") {\n    this.pdfPage.getAnnotations({ intent }).then(annotations => {\n      if (this._cancelled) {\n        return;\n      }\n\n      const parameters = {\n        viewport: viewport.clone({ dontFlip: true }),\n        div: this.div,\n        annotations,\n        page: this.pdfPage,\n        imageResourcesPath: this.imageResourcesPath,\n        renderInteractiveForms: this.renderInteractiveForms,\n        linkService: this.linkService,\n        downloadManager: this.downloadManager,\n      };\n\n      if (this.div) {\n        // If an annotationLayer already exists, refresh its children's\n        // transformation matrices.\n        AnnotationLayer.update(parameters);\n      } else {\n        // Create an annotation layer div and render the annotations\n        // if there is at least one annotation.\n        if (annotations.length === 0) {\n          return;\n        }\n        this.div = document.createElement(\"div\");\n        this.div.className = \"annotationLayer\";\n        this.pageDiv.appendChild(this.div);\n        parameters.div = this.div;\n\n        AnnotationLayer.render(parameters);\n        this.l10n.translate(this.div);\n      }\n    });\n  }\n\n  cancel() {\n    this._cancelled = true;\n  }\n\n  hide() {\n    if (!this.div) {\n      return;\n    }\n    this.div.setAttribute(\"hidden\", \"true\");\n  }\n}\n\n/**\n * @implements IPDFAnnotationLayerFactory\n */\nclass DefaultAnnotationLayerFactory {\n  /**\n   * @param {HTMLDivElement} pageDiv\n   * @param {PDFPage} pdfPage\n   * @param {string} [imageResourcesPath] - Path for image resources, mainly\n   *   for annotation icons. Include trailing slash.\n   * @param {boolean} renderInteractiveForms\n   * @param {IL10n} l10n\n   * @returns {AnnotationLayerBuilder}\n   */\n  createAnnotationLayerBuilder(\n    pageDiv,\n    pdfPage,\n    imageResourcesPath = \"\",\n    renderInteractiveForms = false,\n    l10n = NullL10n\n  ) {\n    return new AnnotationLayerBuilder({\n      pageDiv,\n      pdfPage,\n      imageResourcesPath,\n      renderInteractiveForms,\n      linkService: new SimpleLinkService(),\n      l10n,\n    });\n  }\n}\n\nexport { AnnotationLayerBuilder, DefaultAnnotationLayerFactory };\n","/* Copyright 2016 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* globals module, __non_webpack_require__ */\n\n\"use strict\";\n\nlet pdfjsLib;\nif (typeof window !== \"undefined\" && window[\"pdfjs-dist/build/pdf\"]) {\n  pdfjsLib = window[\"pdfjs-dist/build/pdf\"];\n} else {\n  pdfjsLib = __non_webpack_require__(\"../build/pdf.js\");\n}\nmodule.exports = pdfjsLib;\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nconst CSS_UNITS = 96.0 / 72.0;\nconst DEFAULT_SCALE_VALUE = \"auto\";\nconst DEFAULT_SCALE = 1.0;\nconst MIN_SCALE = 0.1;\nconst MAX_SCALE = 10.0;\nconst UNKNOWN_SCALE = 0;\nconst MAX_AUTO_SCALE = 1.25;\nconst SCROLLBAR_PADDING = 40;\nconst VERTICAL_PADDING = 5;\n\nconst PresentationModeState = {\n  UNKNOWN: 0,\n  NORMAL: 1,\n  CHANGING: 2,\n  FULLSCREEN: 3,\n};\n\nconst RendererType = {\n  CANVAS: \"canvas\",\n  SVG: \"svg\",\n};\n\nconst TextLayerMode = {\n  DISABLE: 0,\n  ENABLE: 1,\n  ENABLE_ENHANCE: 2,\n};\n\nconst ScrollMode = {\n  UNKNOWN: -1,\n  VERTICAL: 0, // Default value.\n  HORIZONTAL: 1,\n  WRAPPED: 2,\n};\n\nconst SpreadMode = {\n  UNKNOWN: -1,\n  NONE: 0, // Default value.\n  ODD: 1,\n  EVEN: 2,\n};\n\n// Used by `PDFViewerApplication`, and by the API unit-tests.\nconst AutoPrintRegExp = /\\bprint\\s*\\(/;\n\n// Replaces {{arguments}} with their values.\nfunction formatL10nValue(text, args) {\n  if (!args) {\n    return text;\n  }\n  return text.replace(/\\{\\{\\s*(\\w+)\\s*\\}\\}/g, (all, name) => {\n    return name in args ? args[name] : \"{{\" + name + \"}}\";\n  });\n}\n\n/**\n * No-op implementation of the localization service.\n * @implements {IL10n}\n */\nconst NullL10n = {\n  async getLanguage() {\n    return \"en-us\";\n  },\n\n  async getDirection() {\n    return \"ltr\";\n  },\n\n  async get(property, args, fallback) {\n    return formatL10nValue(fallback, args);\n  },\n\n  async translate(element) {},\n};\n\n/**\n * Returns scale factor for the canvas. It makes sense for the HiDPI displays.\n * @returns {Object} The object with horizontal (sx) and vertical (sy)\n *                   scales. The scaled property is set to false if scaling is\n *                   not required, true otherwise.\n */\nfunction getOutputScale(ctx) {\n  const devicePixelRatio = window.devicePixelRatio || 1;\n  const backingStoreRatio =\n    ctx.webkitBackingStorePixelRatio ||\n    ctx.mozBackingStorePixelRatio ||\n    ctx.msBackingStorePixelRatio ||\n    ctx.oBackingStorePixelRatio ||\n    ctx.backingStorePixelRatio ||\n    1;\n  const pixelRatio = devicePixelRatio / backingStoreRatio;\n  return {\n    sx: pixelRatio,\n    sy: pixelRatio,\n    scaled: pixelRatio !== 1,\n  };\n}\n\n/**\n * Scrolls specified element into view of its parent.\n * @param {Object} element - The element to be visible.\n * @param {Object} spot - An object with optional top and left properties,\n *   specifying the offset from the top left edge.\n * @param {boolean} skipOverflowHiddenElements - Ignore elements that have\n *   the CSS rule `overflow: hidden;` set. The default is false.\n */\nfunction scrollIntoView(element, spot, skipOverflowHiddenElements = false) {\n  // Assuming offsetParent is available (it's not available when viewer is in\n  // hidden iframe or object). We have to scroll: if the offsetParent is not set\n  // producing the error. See also animationStarted.\n  let parent = element.offsetParent;\n  if (!parent) {\n    console.error(\"offsetParent is not set -- cannot scroll\");\n    return;\n  }\n  let offsetY = element.offsetTop + element.clientTop;\n  let offsetX = element.offsetLeft + element.clientLeft;\n  while (\n    (parent.clientHeight === parent.scrollHeight &&\n      parent.clientWidth === parent.scrollWidth) ||\n    (skipOverflowHiddenElements &&\n      getComputedStyle(parent).overflow === \"hidden\")\n  ) {\n    if (parent.dataset._scaleY) {\n      offsetY /= parent.dataset._scaleY;\n      offsetX /= parent.dataset._scaleX;\n    }\n    offsetY += parent.offsetTop;\n    offsetX += parent.offsetLeft;\n    parent = parent.offsetParent;\n    if (!parent) {\n      return; // no need to scroll\n    }\n  }\n  if (spot) {\n    if (spot.top !== undefined) {\n      offsetY += spot.top;\n    }\n    if (spot.left !== undefined) {\n      offsetX += spot.left;\n      parent.scrollLeft = offsetX;\n    }\n  }\n  parent.scrollTop = offsetY;\n}\n\n/**\n * Helper function to start monitoring the scroll event and converting them into\n * PDF.js friendly one: with scroll debounce and scroll direction.\n */\nfunction watchScroll(viewAreaElement, callback) {\n  const debounceScroll = function (evt) {\n    if (rAF) {\n      return;\n    }\n    // schedule an invocation of scroll for next animation frame.\n    rAF = window.requestAnimationFrame(function viewAreaElementScrolled() {\n      rAF = null;\n\n      const currentX = viewAreaElement.scrollLeft;\n      const lastX = state.lastX;\n      if (currentX !== lastX) {\n        state.right = currentX > lastX;\n      }\n      state.lastX = currentX;\n      const currentY = viewAreaElement.scrollTop;\n      const lastY = state.lastY;\n      if (currentY !== lastY) {\n        state.down = currentY > lastY;\n      }\n      state.lastY = currentY;\n      callback(state);\n    });\n  };\n\n  const state = {\n    right: true,\n    down: true,\n    lastX: viewAreaElement.scrollLeft,\n    lastY: viewAreaElement.scrollTop,\n    _eventHandler: debounceScroll,\n  };\n\n  let rAF = null;\n  viewAreaElement.addEventListener(\"scroll\", debounceScroll, true);\n  return state;\n}\n\n/**\n * Helper function to parse query string (e.g. ?param1=value&parm2=...).\n */\nfunction parseQueryString(query) {\n  const parts = query.split(\"&\");\n  const params = Object.create(null);\n  for (let i = 0, ii = parts.length; i < ii; ++i) {\n    const param = parts[i].split(\"=\");\n    const key = param[0].toLowerCase();\n    const value = param.length > 1 ? param[1] : null;\n    params[decodeURIComponent(key)] = decodeURIComponent(value);\n  }\n  return params;\n}\n\n/**\n * Use binary search to find the index of the first item in a given array which\n * passes a given condition. The items are expected to be sorted in the sense\n * that if the condition is true for one item in the array, then it is also true\n * for all following items.\n *\n * @returns {number} Index of the first array element to pass the test,\n *                   or |items.length| if no such element exists.\n */\nfunction binarySearchFirstItem(items, condition) {\n  let minIndex = 0;\n  let maxIndex = items.length - 1;\n\n  if (maxIndex < 0 || !condition(items[maxIndex])) {\n    return items.length;\n  }\n  if (condition(items[minIndex])) {\n    return minIndex;\n  }\n\n  while (minIndex < maxIndex) {\n    const currentIndex = (minIndex + maxIndex) >> 1;\n    const currentItem = items[currentIndex];\n    if (condition(currentItem)) {\n      maxIndex = currentIndex;\n    } else {\n      minIndex = currentIndex + 1;\n    }\n  }\n  return minIndex; /* === maxIndex */\n}\n\n/**\n *  Approximates float number as a fraction using Farey sequence (max order\n *  of 8).\n *  @param {number} x - Positive float number.\n *  @returns {Array} Estimated fraction: the first array item is a numerator,\n *                   the second one is a denominator.\n */\nfunction approximateFraction(x) {\n  // Fast paths for int numbers or their inversions.\n  if (Math.floor(x) === x) {\n    return [x, 1];\n  }\n  const xinv = 1 / x;\n  const limit = 8;\n  if (xinv > limit) {\n    return [1, limit];\n  } else if (Math.floor(xinv) === xinv) {\n    return [1, xinv];\n  }\n\n  const x_ = x > 1 ? xinv : x;\n  // a/b and c/d are neighbours in Farey sequence.\n  let a = 0,\n    b = 1,\n    c = 1,\n    d = 1;\n  // Limiting search to order 8.\n  while (true) {\n    // Generating next term in sequence (order of q).\n    const p = a + c,\n      q = b + d;\n    if (q > limit) {\n      break;\n    }\n    if (x_ <= p / q) {\n      c = p;\n      d = q;\n    } else {\n      a = p;\n      b = q;\n    }\n  }\n  let result;\n  // Select closest of the neighbours to x.\n  if (x_ - a / b < c / d - x_) {\n    result = x_ === x ? [a, b] : [b, a];\n  } else {\n    result = x_ === x ? [c, d] : [d, c];\n  }\n  return result;\n}\n\nfunction roundToDivide(x, div) {\n  const r = x % div;\n  return r === 0 ? x : Math.round(x - r + div);\n}\n\n/**\n * Gets the size of the specified page, converted from PDF units to inches.\n * @param {Object} An Object containing the properties: {Array} `view`,\n *   {number} `userUnit`, and {number} `rotate`.\n * @returns {Object} An Object containing the properties: {number} `width`\n *   and {number} `height`, given in inches.\n */\nfunction getPageSizeInches({ view, userUnit, rotate }) {\n  const [x1, y1, x2, y2] = view;\n  // We need to take the page rotation into account as well.\n  const changeOrientation = rotate % 180 !== 0;\n\n  const width = ((x2 - x1) / 72) * userUnit;\n  const height = ((y2 - y1) / 72) * userUnit;\n\n  return {\n    width: changeOrientation ? height : width,\n    height: changeOrientation ? width : height,\n  };\n}\n\n/**\n * Helper function for getVisibleElements.\n *\n * @param {number} index - initial guess at the first visible element\n * @param {Array} views - array of pages, into which `index` is an index\n * @param {number} top - the top of the scroll pane\n * @returns {number} less than or equal to `index` that is definitely at or\n *   before the first visible element in `views`, but not by too much. (Usually,\n *   this will be the first element in the first partially visible row in\n *   `views`, although sometimes it goes back one row further.)\n */\nfunction backtrackBeforeAllVisibleElements(index, views, top) {\n  // binarySearchFirstItem's assumption is that the input is ordered, with only\n  // one index where the conditions flips from false to true: [false ...,\n  // true...]. With vertical scrolling and spreads, it is possible to have\n  // [false ..., true, false, true ...]. With wrapped scrolling we can have a\n  // similar sequence, with many more mixed true and false in the middle.\n  //\n  // So there is no guarantee that the binary search yields the index of the\n  // first visible element. It could have been any of the other visible elements\n  // that were preceded by a hidden element.\n\n  // Of course, if either this element or the previous (hidden) element is also\n  // the first element, there's nothing to worry about.\n  if (index < 2) {\n    return index;\n  }\n\n  // That aside, the possible cases are represented below.\n  //\n  //     ****  = fully hidden\n  //     A*B*  = mix of partially visible and/or hidden pages\n  //     CDEF  = fully visible\n  //\n  // (1) Binary search could have returned A, in which case we can stop.\n  // (2) Binary search could also have returned B, in which case we need to\n  // check the whole row.\n  // (3) Binary search could also have returned C, in which case we need to\n  // check the whole previous row.\n  //\n  // There's one other possibility:\n  //\n  //     ****  = fully hidden\n  //     ABCD  = mix of fully and/or partially visible pages\n  //\n  // (4) Binary search could only have returned A.\n\n  // Initially assume that we need to find the beginning of the current row\n  // (case 1, 2, or 4), which means finding a page that is above the current\n  // page's top. If the found page is partially visible, we're definitely not in\n  // case 3, and this assumption is correct.\n  let elt = views[index].div;\n  let pageTop = elt.offsetTop + elt.clientTop;\n\n  if (pageTop >= top) {\n    // The found page is fully visible, so we're actually either in case 3 or 4,\n    // and unfortunately we can't tell the difference between them without\n    // scanning the entire previous row, so we just conservatively assume that\n    // we do need to backtrack to that row. In both cases, the previous page is\n    // in the previous row, so use its top instead.\n    elt = views[index - 1].div;\n    pageTop = elt.offsetTop + elt.clientTop;\n  }\n\n  // Now we backtrack to the first page that still has its bottom below\n  // `pageTop`, which is the top of a page in the first visible row (unless\n  // we're in case 4, in which case it's the row before that).\n  // `index` is found by binary search, so the page at `index - 1` is\n  // invisible and we can start looking for potentially visible pages from\n  // `index - 2`. (However, if this loop terminates on its first iteration,\n  // which is the case when pages are stacked vertically, `index` should remain\n  // unchanged, so we use a distinct loop variable.)\n  for (let i = index - 2; i >= 0; --i) {\n    elt = views[i].div;\n    if (elt.offsetTop + elt.clientTop + elt.clientHeight <= pageTop) {\n      // We have reached the previous row, so stop now.\n      // This loop is expected to terminate relatively quickly because the\n      // number of pages per row is expected to be small.\n      break;\n    }\n    index = i;\n  }\n  return index;\n}\n\n/**\n * Generic helper to find out what elements are visible within a scroll pane.\n *\n * Well, pretty generic. There are some assumptions placed on the elements\n * referenced by `views`:\n *   - If `horizontal`, no left of any earlier element is to the right of the\n *     left of any later element.\n *   - Otherwise, `views` can be split into contiguous rows where, within a row,\n *     no top of any element is below the bottom of any other element, and\n *     between rows, no bottom of any element in an earlier row is below the\n *     top of any element in a later row.\n *\n * (Here, top, left, etc. all refer to the padding edge of the element in\n * question. For pages, that ends up being equivalent to the bounding box of the\n * rendering canvas. Earlier and later refer to index in `views`, not page\n * layout.)\n *\n * @param scrollEl {HTMLElement} - a container that can possibly scroll\n * @param views {Array} - objects with a `div` property that contains an\n *   HTMLElement, which should all be descendents of `scrollEl` satisfying the\n *   above layout assumptions\n * @param sortByVisibility {boolean} - if true, the returned elements are sorted\n *   in descending order of the percent of their padding box that is visible\n * @param horizontal {boolean} - if true, the elements are assumed to be laid\n *   out horizontally instead of vertically\n * @returns {Object} `{ first, last, views: [{ id, x, y, view, percent }] }`\n */\nfunction getVisibleElements(\n  scrollEl,\n  views,\n  sortByVisibility = false,\n  horizontal = false\n) {\n  const top = scrollEl.scrollTop,\n    bottom = top + scrollEl.clientHeight;\n  const left = scrollEl.scrollLeft,\n    right = left + scrollEl.clientWidth;\n\n  // Throughout this \"generic\" function, comments will assume we're working with\n  // PDF document pages, which is the most important and complex case. In this\n  // case, the visible elements we're actually interested is the page canvas,\n  // which is contained in a wrapper which adds no padding/border/margin, which\n  // is itself contained in `view.div` which adds no padding (but does add a\n  // border). So, as specified in this function's doc comment, this function\n  // does all of its work on the padding edge of the provided views, starting at\n  // offsetLeft/Top (which includes margin) and adding clientLeft/Top (which is\n  // the border). Adding clientWidth/Height gets us the bottom-right corner of\n  // the padding edge.\n  function isElementBottomAfterViewTop(view) {\n    const element = view.div;\n    const elementBottom =\n      element.offsetTop + element.clientTop + element.clientHeight;\n    return elementBottom > top;\n  }\n  function isElementRightAfterViewLeft(view) {\n    const element = view.div;\n    const elementRight =\n      element.offsetLeft + element.clientLeft + element.clientWidth;\n    return elementRight > left;\n  }\n\n  const visible = [],\n    numViews = views.length;\n  let firstVisibleElementInd =\n    numViews === 0\n      ? 0\n      : binarySearchFirstItem(\n          views,\n          horizontal ? isElementRightAfterViewLeft : isElementBottomAfterViewTop\n        );\n\n  // Please note the return value of the `binarySearchFirstItem` function when\n  // no valid element is found (hence the `firstVisibleElementInd` check below).\n  if (\n    firstVisibleElementInd > 0 &&\n    firstVisibleElementInd < numViews &&\n    !horizontal\n  ) {\n    // In wrapped scrolling (or vertical scrolling with spreads), with some page\n    // sizes, isElementBottomAfterViewTop doesn't satisfy the binary search\n    // condition: there can be pages with bottoms above the view top between\n    // pages with bottoms below. This function detects and corrects that error;\n    // see it for more comments.\n    firstVisibleElementInd = backtrackBeforeAllVisibleElements(\n      firstVisibleElementInd,\n      views,\n      top\n    );\n  }\n\n  // lastEdge acts as a cutoff for us to stop looping, because we know all\n  // subsequent pages will be hidden.\n  //\n  // When using wrapped scrolling or vertical scrolling with spreads, we can't\n  // simply stop the first time we reach a page below the bottom of the view;\n  // the tops of subsequent pages on the same row could still be visible. In\n  // horizontal scrolling, we don't have that issue, so we can stop as soon as\n  // we pass `right`, without needing the code below that handles the -1 case.\n  let lastEdge = horizontal ? right : -1;\n\n  for (let i = firstVisibleElementInd; i < numViews; i++) {\n    const view = views[i],\n      element = view.div;\n    const currentWidth = element.offsetLeft + element.clientLeft;\n    const currentHeight = element.offsetTop + element.clientTop;\n    const viewWidth = element.clientWidth,\n      viewHeight = element.clientHeight;\n    const viewRight = currentWidth + viewWidth;\n    const viewBottom = currentHeight + viewHeight;\n\n    if (lastEdge === -1) {\n      // As commented above, this is only needed in non-horizontal cases.\n      // Setting lastEdge to the bottom of the first page that is partially\n      // visible ensures that the next page fully below lastEdge is on the\n      // next row, which has to be fully hidden along with all subsequent rows.\n      if (viewBottom >= bottom) {\n        lastEdge = viewBottom;\n      }\n    } else if ((horizontal ? currentWidth : currentHeight) > lastEdge) {\n      break;\n    }\n\n    if (\n      viewBottom <= top ||\n      currentHeight >= bottom ||\n      viewRight <= left ||\n      currentWidth >= right\n    ) {\n      continue;\n    }\n\n    const hiddenHeight =\n      Math.max(0, top - currentHeight) + Math.max(0, viewBottom - bottom);\n    const hiddenWidth =\n      Math.max(0, left - currentWidth) + Math.max(0, viewRight - right);\n    const percent =\n      (((viewHeight - hiddenHeight) * (viewWidth - hiddenWidth) * 100) /\n        viewHeight /\n        viewWidth) |\n      0;\n    visible.push({\n      id: view.id,\n      x: currentWidth,\n      y: currentHeight,\n      view,\n      percent,\n    });\n  }\n\n  const first = visible[0],\n    last = visible[visible.length - 1];\n\n  if (sortByVisibility) {\n    visible.sort(function (a, b) {\n      const pc = a.percent - b.percent;\n      if (Math.abs(pc) > 0.001) {\n        return -pc;\n      }\n      return a.id - b.id; // ensure stability\n    });\n  }\n  return { first, last, views: visible };\n}\n\n/**\n * Event handler to suppress context menu.\n */\nfunction noContextMenuHandler(evt) {\n  evt.preventDefault();\n}\n\nfunction isDataSchema(url) {\n  let i = 0;\n  const ii = url.length;\n  while (i < ii && url[i].trim() === \"\") {\n    i++;\n  }\n  return url.substring(i, i + 5).toLowerCase() === \"data:\";\n}\n\n/**\n * Returns the filename or guessed filename from the url (see issue 3455).\n * @param {string} url - The original PDF location.\n * @param {string} defaultFilename - The value returned if the filename is\n *   unknown, or the protocol is unsupported.\n * @returns {string} Guessed PDF filename.\n */\nfunction getPDFFileNameFromURL(url, defaultFilename = \"document.pdf\") {\n  if (typeof url !== \"string\") {\n    return defaultFilename;\n  }\n  if (isDataSchema(url)) {\n    console.warn(\n      \"getPDFFileNameFromURL: \" +\n        'ignoring \"data:\" URL for performance reasons.'\n    );\n    return defaultFilename;\n  }\n  const reURI = /^(?:(?:[^:]+:)?\\/\\/[^\\/]+)?([^?#]*)(\\?[^#]*)?(#.*)?$/;\n  //              SCHEME        HOST         1.PATH  2.QUERY   3.REF\n  // Pattern to get last matching NAME.pdf\n  const reFilename = /[^\\/?#=]+\\.pdf\\b(?!.*\\.pdf\\b)/i;\n  const splitURI = reURI.exec(url);\n  let suggestedFilename =\n    reFilename.exec(splitURI[1]) ||\n    reFilename.exec(splitURI[2]) ||\n    reFilename.exec(splitURI[3]);\n  if (suggestedFilename) {\n    suggestedFilename = suggestedFilename[0];\n    if (suggestedFilename.includes(\"%\")) {\n      // URL-encoded %2Fpath%2Fto%2Ffile.pdf should be file.pdf\n      try {\n        suggestedFilename = reFilename.exec(\n          decodeURIComponent(suggestedFilename)\n        )[0];\n      } catch (ex) {\n        // Possible (extremely rare) errors:\n        // URIError \"Malformed URI\", e.g. for \"%AA.pdf\"\n        // TypeError \"null has no properties\", e.g. for \"%2F.pdf\"\n      }\n    }\n  }\n  return suggestedFilename || defaultFilename;\n}\n\nfunction normalizeWheelEventDelta(evt) {\n  let delta = Math.sqrt(evt.deltaX * evt.deltaX + evt.deltaY * evt.deltaY);\n  const angle = Math.atan2(evt.deltaY, evt.deltaX);\n  if (-0.25 * Math.PI < angle && angle < 0.75 * Math.PI) {\n    // All that is left-up oriented has to change the sign.\n    delta = -delta;\n  }\n\n  const MOUSE_DOM_DELTA_PIXEL_MODE = 0;\n  const MOUSE_DOM_DELTA_LINE_MODE = 1;\n  const MOUSE_PIXELS_PER_LINE = 30;\n  const MOUSE_LINES_PER_PAGE = 30;\n\n  // Converts delta to per-page units\n  if (evt.deltaMode === MOUSE_DOM_DELTA_PIXEL_MODE) {\n    delta /= MOUSE_PIXELS_PER_LINE * MOUSE_LINES_PER_PAGE;\n  } else if (evt.deltaMode === MOUSE_DOM_DELTA_LINE_MODE) {\n    delta /= MOUSE_LINES_PER_PAGE;\n  }\n  return delta;\n}\n\nfunction isValidRotation(angle) {\n  return Number.isInteger(angle) && angle % 90 === 0;\n}\n\nfunction isValidScrollMode(mode) {\n  return (\n    Number.isInteger(mode) &&\n    Object.values(ScrollMode).includes(mode) &&\n    mode !== ScrollMode.UNKNOWN\n  );\n}\n\nfunction isValidSpreadMode(mode) {\n  return (\n    Number.isInteger(mode) &&\n    Object.values(SpreadMode).includes(mode) &&\n    mode !== SpreadMode.UNKNOWN\n  );\n}\n\nfunction isPortraitOrientation(size) {\n  return size.width <= size.height;\n}\n\nconst WaitOnType = {\n  EVENT: \"event\",\n  TIMEOUT: \"timeout\",\n};\n\n/**\n * @typedef {Object} WaitOnEventOrTimeoutParameters\n * @property {Object} target - The event target, can for example be:\n *   `window`, `document`, a DOM element, or an {EventBus} instance.\n * @property {string} name - The name of the event.\n * @property {number} delay - The delay, in milliseconds, after which the\n *   timeout occurs (if the event wasn't already dispatched).\n */\n\n/**\n * Allows waiting for an event or a timeout, whichever occurs first.\n * Can be used to ensure that an action always occurs, even when an event\n * arrives late or not at all.\n *\n * @param {WaitOnEventOrTimeoutParameters}\n * @returns {Promise} A promise that is resolved with a {WaitOnType} value.\n */\nfunction waitOnEventOrTimeout({ target, name, delay = 0 }) {\n  return new Promise(function (resolve, reject) {\n    if (\n      typeof target !== \"object\" ||\n      !(name && typeof name === \"string\") ||\n      !(Number.isInteger(delay) && delay >= 0)\n    ) {\n      throw new Error(\"waitOnEventOrTimeout - invalid parameters.\");\n    }\n\n    function handler(type) {\n      if (target instanceof EventBus) {\n        target._off(name, eventHandler);\n      } else {\n        target.removeEventListener(name, eventHandler);\n      }\n\n      if (timeout) {\n        clearTimeout(timeout);\n      }\n      resolve(type);\n    }\n\n    const eventHandler = handler.bind(null, WaitOnType.EVENT);\n    if (target instanceof EventBus) {\n      target._on(name, eventHandler);\n    } else {\n      target.addEventListener(name, eventHandler);\n    }\n\n    const timeoutHandler = handler.bind(null, WaitOnType.TIMEOUT);\n    const timeout = setTimeout(timeoutHandler, delay);\n  });\n}\n\n/**\n * Promise that is resolved when DOM window becomes visible.\n */\nconst animationStarted = new Promise(function (resolve) {\n  if (\n    typeof PDFJSDev !== \"undefined\" &&\n    PDFJSDev.test(\"LIB && TESTING\") &&\n    typeof window === \"undefined\"\n  ) {\n    // Prevent \"ReferenceError: window is not defined\" errors when running the\n    // unit-tests in Node.js/Travis.\n    setTimeout(resolve, 20);\n    return;\n  }\n  window.requestAnimationFrame(resolve);\n});\n\n/**\n * NOTE: Only used to support various PDF viewer tests in `mozilla-central`.\n */\nfunction dispatchDOMEvent(eventName, args = null) {\n  if (typeof PDFJSDev !== \"undefined\" && !PDFJSDev.test(\"MOZCENTRAL\")) {\n    throw new Error(\"Not implemented: dispatchDOMEvent\");\n  }\n  const details = Object.create(null);\n  if (args && args.length > 0) {\n    const obj = args[0];\n    for (const key in obj) {\n      const value = obj[key];\n      if (key === \"source\") {\n        if (value === window || value === document) {\n          return; // No need to re-dispatch (already) global events.\n        }\n        continue; // Ignore the `source` property.\n      }\n      details[key] = value;\n    }\n  }\n  const event = document.createEvent(\"CustomEvent\");\n  event.initCustomEvent(eventName, true, true, details);\n  document.dispatchEvent(event);\n}\n\n/**\n * Simple event bus for an application. Listeners are attached using the `on`\n * and `off` methods. To raise an event, the `dispatch` method shall be used.\n */\nclass EventBus {\n  constructor(options) {\n    this._listeners = Object.create(null);\n\n    if (typeof PDFJSDev === \"undefined\" || PDFJSDev.test(\"MOZCENTRAL\")) {\n      this._isInAutomation = (options && options.isInAutomation) === true;\n    }\n  }\n\n  /**\n   * @param {string} eventName\n   * @param {function} listener\n   */\n  on(eventName, listener) {\n    this._on(eventName, listener, { external: true });\n  }\n\n  /**\n   * @param {string} eventName\n   * @param {function} listener\n   */\n  off(eventName, listener) {\n    this._off(eventName, listener, { external: true });\n  }\n\n  dispatch(eventName) {\n    const eventListeners = this._listeners[eventName];\n    if (!eventListeners || eventListeners.length === 0) {\n      if (\n        (typeof PDFJSDev === \"undefined\" || PDFJSDev.test(\"MOZCENTRAL\")) &&\n        this._isInAutomation\n      ) {\n        const args = Array.prototype.slice.call(arguments, 1);\n        dispatchDOMEvent(eventName, args);\n      }\n      return;\n    }\n    // Passing all arguments after the eventName to the listeners.\n    const args = Array.prototype.slice.call(arguments, 1);\n    let externalListeners;\n    // Making copy of the listeners array in case if it will be modified\n    // during dispatch.\n    eventListeners.slice(0).forEach(function ({ listener, external }) {\n      if (external) {\n        if (!externalListeners) {\n          externalListeners = [];\n        }\n        externalListeners.push(listener);\n        return;\n      }\n      listener.apply(null, args);\n    });\n    // Dispatch any \"external\" listeners *after* the internal ones, to give the\n    // viewer components time to handle events and update their state first.\n    if (externalListeners) {\n      externalListeners.forEach(function (listener) {\n        listener.apply(null, args);\n      });\n      externalListeners = null;\n    }\n    if (\n      (typeof PDFJSDev === \"undefined\" || PDFJSDev.test(\"MOZCENTRAL\")) &&\n      this._isInAutomation\n    ) {\n      dispatchDOMEvent(eventName, args);\n    }\n  }\n\n  /**\n   * @ignore\n   */\n  _on(eventName, listener, options = null) {\n    let eventListeners = this._listeners[eventName];\n    if (!eventListeners) {\n      this._listeners[eventName] = eventListeners = [];\n    }\n    eventListeners.push({\n      listener,\n      external: (options && options.external) === true,\n    });\n  }\n\n  /**\n   * @ignore\n   */\n  _off(eventName, listener, options = null) {\n    const eventListeners = this._listeners[eventName];\n    if (!eventListeners) {\n      return;\n    }\n    for (let i = 0, ii = eventListeners.length; i < ii; i++) {\n      if (eventListeners[i].listener === listener) {\n        eventListeners.splice(i, 1);\n        return;\n      }\n    }\n  }\n}\n\nfunction clamp(v, min, max) {\n  return Math.min(Math.max(v, min), max);\n}\n\nclass ProgressBar {\n  constructor(id, { height, width, units } = {}) {\n    this.visible = true;\n\n    // Fetch the sub-elements for later.\n    this.div = document.querySelector(id + \" .progress\");\n    // Get the loading bar element, so it can be resized to fit the viewer.\n    this.bar = this.div.parentNode;\n\n    // Get options, with sensible defaults.\n    this.height = height || 100;\n    this.width = width || 100;\n    this.units = units || \"%\";\n\n    // Initialize heights.\n    this.div.style.height = this.height + this.units;\n    this.percent = 0;\n  }\n\n  _updateBar() {\n    if (this._indeterminate) {\n      this.div.classList.add(\"indeterminate\");\n      this.div.style.width = this.width + this.units;\n      return;\n    }\n\n    this.div.classList.remove(\"indeterminate\");\n    const progressSize = (this.width * this._percent) / 100;\n    this.div.style.width = progressSize + this.units;\n  }\n\n  get percent() {\n    return this._percent;\n  }\n\n  set percent(val) {\n    this._indeterminate = isNaN(val);\n    this._percent = clamp(val, 0, 100);\n    this._updateBar();\n  }\n\n  setWidth(viewer) {\n    if (!viewer) {\n      return;\n    }\n    const container = viewer.parentNode;\n    const scrollbarWidth = container.offsetWidth - viewer.offsetWidth;\n    if (scrollbarWidth > 0) {\n      this.bar.style.width = `calc(100% - ${scrollbarWidth}px)`;\n    }\n  }\n\n  hide() {\n    if (!this.visible) {\n      return;\n    }\n    this.visible = false;\n    this.bar.classList.add(\"hidden\");\n    document.body.classList.remove(\"loadingInProgress\");\n  }\n\n  show() {\n    if (this.visible) {\n      return;\n    }\n    this.visible = true;\n    document.body.classList.add(\"loadingInProgress\");\n    this.bar.classList.remove(\"hidden\");\n  }\n}\n\n/**\n * Moves all elements of an array that satisfy condition to the end of the\n * array, preserving the order of the rest.\n */\nfunction moveToEndOfArray(arr, condition) {\n  const moved = [],\n    len = arr.length;\n  let write = 0;\n  for (let read = 0; read < len; ++read) {\n    if (condition(arr[read])) {\n      moved.push(arr[read]);\n    } else {\n      arr[write] = arr[read];\n      ++write;\n    }\n  }\n  for (let read = 0; write < len; ++read, ++write) {\n    arr[write] = moved[read];\n  }\n}\n\nexport {\n  AutoPrintRegExp,\n  CSS_UNITS,\n  DEFAULT_SCALE_VALUE,\n  DEFAULT_SCALE,\n  MIN_SCALE,\n  MAX_SCALE,\n  UNKNOWN_SCALE,\n  MAX_AUTO_SCALE,\n  SCROLLBAR_PADDING,\n  VERTICAL_PADDING,\n  isValidRotation,\n  isValidScrollMode,\n  isValidSpreadMode,\n  isPortraitOrientation,\n  PresentationModeState,\n  RendererType,\n  TextLayerMode,\n  ScrollMode,\n  SpreadMode,\n  NullL10n,\n  EventBus,\n  clamp,\n  ProgressBar,\n  getPDFFileNameFromURL,\n  noContextMenuHandler,\n  parseQueryString,\n  backtrackBeforeAllVisibleElements, // only exported for testing\n  getVisibleElements,\n  roundToDivide,\n  getPageSizeInches,\n  approximateFraction,\n  getOutputScale,\n  scrollIntoView,\n  watchScroll,\n  binarySearchFirstItem,\n  normalizeWheelEventDelta,\n  animationStarted,\n  WaitOnType,\n  waitOnEventOrTimeout,\n  moveToEndOfArray,\n};\n","/* Copyright 2015 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { parseQueryString } from \"./ui_utils.js\";\n\n/**\n * @typedef {Object} PDFLinkServiceOptions\n * @property {EventBus} eventBus - The application event bus.\n * @property {number} [externalLinkTarget] - Specifies the `target` attribute\n *   for external links. Must use one of the values from {LinkTarget}.\n *   Defaults to using no target.\n * @property {string} [externalLinkRel] - Specifies the `rel` attribute for\n *   external links. Defaults to stripping the referrer.\n * @property {boolean} [ignoreDestinationZoom] - Ignores the zoom argument,\n *   thus preserving the current zoom level in the viewer, when navigating\n *   to internal destinations. The default value is `false`.\n */\n\n/**\n * Performs navigation functions inside PDF, such as opening specified page,\n * or destination.\n * @implements {IPDFLinkService}\n */\nclass PDFLinkService {\n  /**\n   * @param {PDFLinkServiceOptions} options\n   */\n  constructor({\n    eventBus,\n    externalLinkTarget = null,\n    externalLinkRel = null,\n    externalLinkEnabled = true,\n    ignoreDestinationZoom = false,\n  } = {}) {\n    this.eventBus = eventBus;\n    this.externalLinkTarget = externalLinkTarget;\n    this.externalLinkRel = externalLinkRel;\n    this.externalLinkEnabled = externalLinkEnabled;\n    this._ignoreDestinationZoom = ignoreDestinationZoom;\n\n    this.baseUrl = null;\n    this.pdfDocument = null;\n    this.pdfViewer = null;\n    this.pdfHistory = null;\n\n    this._pagesRefCache = null;\n  }\n\n  setDocument(pdfDocument, baseUrl = null) {\n    this.baseUrl = baseUrl;\n    this.pdfDocument = pdfDocument;\n    this._pagesRefCache = Object.create(null);\n  }\n\n  setViewer(pdfViewer) {\n    this.pdfViewer = pdfViewer;\n  }\n\n  setHistory(pdfHistory) {\n    this.pdfHistory = pdfHistory;\n  }\n\n  /**\n   * @type {number}\n   */\n  get pagesCount() {\n    return this.pdfDocument ? this.pdfDocument.numPages : 0;\n  }\n\n  /**\n   * @type {number}\n   */\n  get page() {\n    return this.pdfViewer.currentPageNumber;\n  }\n\n  /**\n   * @param {number} value\n   */\n  set page(value) {\n    this.pdfViewer.currentPageNumber = value;\n  }\n\n  /**\n   * @type {number}\n   */\n  get rotation() {\n    return this.pdfViewer.pagesRotation;\n  }\n\n  /**\n   * @param {number} value\n   */\n  set rotation(value) {\n    this.pdfViewer.pagesRotation = value;\n  }\n\n  /**\n   * @param {string|Array} dest - The named, or explicit, PDF destination.\n   */\n  navigateTo(dest) {\n    const goToDestination = ({ namedDest, explicitDest }) => {\n      // Dest array looks like that: <page-ref> </XYZ|/FitXXX> <args..>\n      const destRef = explicitDest[0];\n      let pageNumber;\n\n      if (destRef instanceof Object) {\n        pageNumber = this._cachedPageNumber(destRef);\n\n        if (pageNumber === null) {\n          // Fetch the page reference if it's not yet available. This could\n          // only occur during loading, before all pages have been resolved.\n          this.pdfDocument\n            .getPageIndex(destRef)\n            .then(pageIndex => {\n              this.cachePageRef(pageIndex + 1, destRef);\n              goToDestination({ namedDest, explicitDest });\n            })\n            .catch(() => {\n              console.error(\n                `PDFLinkService.navigateTo: \"${destRef}\" is not ` +\n                  `a valid page reference, for dest=\"${dest}\".`\n              );\n            });\n          return;\n        }\n      } else if (Number.isInteger(destRef)) {\n        pageNumber = destRef + 1;\n      } else {\n        console.error(\n          `PDFLinkService.navigateTo: \"${destRef}\" is not ` +\n            `a valid destination reference, for dest=\"${dest}\".`\n        );\n        return;\n      }\n      if (!pageNumber || pageNumber < 1 || pageNumber > this.pagesCount) {\n        console.error(\n          `PDFLinkService.navigateTo: \"${pageNumber}\" is not ` +\n            `a valid page number, for dest=\"${dest}\".`\n        );\n        return;\n      }\n\n      if (this.pdfHistory) {\n        // Update the browser history before scrolling the new destination into\n        // view, to be able to accurately capture the current document position.\n        this.pdfHistory.pushCurrentPosition();\n        this.pdfHistory.push({ namedDest, explicitDest, pageNumber });\n      }\n\n      this.pdfViewer.scrollPageIntoView({\n        pageNumber,\n        destArray: explicitDest,\n        ignoreDestinationZoom: this._ignoreDestinationZoom,\n      });\n    };\n\n    new Promise((resolve, reject) => {\n      if (typeof dest === \"string\") {\n        this.pdfDocument.getDestination(dest).then(destArray => {\n          resolve({\n            namedDest: dest,\n            explicitDest: destArray,\n          });\n        });\n        return;\n      }\n      resolve({\n        namedDest: \"\",\n        explicitDest: dest,\n      });\n    }).then(data => {\n      if (!Array.isArray(data.explicitDest)) {\n        console.error(\n          `PDFLinkService.navigateTo: \"${data.explicitDest}\" is` +\n            ` not a valid destination array, for dest=\"${dest}\".`\n        );\n        return;\n      }\n      goToDestination(data);\n    });\n  }\n\n  /**\n   * @param {string|Array} dest - The PDF destination object.\n   * @returns {string} The hyperlink to the PDF object.\n   */\n  getDestinationHash(dest) {\n    if (typeof dest === \"string\") {\n      return this.getAnchorUrl(\"#\" + escape(dest));\n    }\n    if (Array.isArray(dest)) {\n      const str = JSON.stringify(dest);\n      return this.getAnchorUrl(\"#\" + escape(str));\n    }\n    return this.getAnchorUrl(\"\");\n  }\n\n  /**\n   * Prefix the full url on anchor links to make sure that links are resolved\n   * relative to the current URL instead of the one defined in <base href>.\n   * @param {string} anchor The anchor hash, including the #.\n   * @returns {string} The hyperlink to the PDF object.\n   */\n  getAnchorUrl(anchor) {\n    return (this.baseUrl || \"\") + anchor;\n  }\n\n  /**\n   * @param {string} hash\n   */\n  setHash(hash) {\n    let pageNumber, dest;\n    if (hash.includes(\"=\")) {\n      const params = parseQueryString(hash);\n      if (\"search\" in params) {\n        this.eventBus.dispatch(\"findfromurlhash\", {\n          source: this,\n          query: params.search.replace(/\"/g, \"\"),\n          phraseSearch: params.phrase === \"true\",\n        });\n      }\n      // borrowing syntax from \"Parameters for Opening PDF Files\"\n      if (\"page\" in params) {\n        pageNumber = params.page | 0 || 1;\n      }\n      if (\"zoom\" in params) {\n        // Build the destination array.\n        const zoomArgs = params.zoom.split(\",\"); // scale,left,top\n        const zoomArg = zoomArgs[0];\n        const zoomArgNumber = parseFloat(zoomArg);\n\n        if (!zoomArg.includes(\"Fit\")) {\n          // If the zoomArg is a number, it has to get divided by 100. If it's\n          // a string, it should stay as it is.\n          dest = [\n            null,\n            { name: \"XYZ\" },\n            zoomArgs.length > 1 ? zoomArgs[1] | 0 : null,\n            zoomArgs.length > 2 ? zoomArgs[2] | 0 : null,\n            zoomArgNumber ? zoomArgNumber / 100 : zoomArg,\n          ];\n        } else {\n          if (zoomArg === \"Fit\" || zoomArg === \"FitB\") {\n            dest = [null, { name: zoomArg }];\n          } else if (\n            zoomArg === \"FitH\" ||\n            zoomArg === \"FitBH\" ||\n            zoomArg === \"FitV\" ||\n            zoomArg === \"FitBV\"\n          ) {\n            dest = [\n              null,\n              { name: zoomArg },\n              zoomArgs.length > 1 ? zoomArgs[1] | 0 : null,\n            ];\n          } else if (zoomArg === \"FitR\") {\n            if (zoomArgs.length !== 5) {\n              console.error(\n                'PDFLinkService.setHash: Not enough parameters for \"FitR\".'\n              );\n            } else {\n              dest = [\n                null,\n                { name: zoomArg },\n                zoomArgs[1] | 0,\n                zoomArgs[2] | 0,\n                zoomArgs[3] | 0,\n                zoomArgs[4] | 0,\n              ];\n            }\n          } else {\n            console.error(\n              `PDFLinkService.setHash: \"${zoomArg}\" is not ` +\n                \"a valid zoom value.\"\n            );\n          }\n        }\n      }\n      if (dest) {\n        this.pdfViewer.scrollPageIntoView({\n          pageNumber: pageNumber || this.page,\n          destArray: dest,\n          allowNegativeOffset: true,\n        });\n      } else if (pageNumber) {\n        this.page = pageNumber; // simple page\n      }\n      if (\"pagemode\" in params) {\n        this.eventBus.dispatch(\"pagemode\", {\n          source: this,\n          mode: params.pagemode,\n        });\n      }\n      // Ensure that this parameter is *always* handled last, in order to\n      // guarantee that it won't be overridden (e.g. by the \"page\" parameter).\n      if (\"nameddest\" in params) {\n        this.navigateTo(params.nameddest);\n      }\n    } else {\n      // Named (or explicit) destination.\n      dest = unescape(hash);\n      try {\n        dest = JSON.parse(dest);\n\n        if (!Array.isArray(dest)) {\n          // Avoid incorrectly rejecting a valid named destination, such as\n          // e.g. \"4.3\" or \"true\", because `JSON.parse` converted its type.\n          dest = dest.toString();\n        }\n      } catch (ex) {}\n\n      if (typeof dest === \"string\" || isValidExplicitDestination(dest)) {\n        this.navigateTo(dest);\n        return;\n      }\n      console.error(\n        `PDFLinkService.setHash: \"${unescape(hash)}\" is not ` +\n          \"a valid destination.\"\n      );\n    }\n  }\n\n  /**\n   * @param {string} action\n   */\n  executeNamedAction(action) {\n    // See PDF reference, table 8.45 - Named action\n    switch (action) {\n      case \"GoBack\":\n        if (this.pdfHistory) {\n          this.pdfHistory.back();\n        }\n        break;\n\n      case \"GoForward\":\n        if (this.pdfHistory) {\n          this.pdfHistory.forward();\n        }\n        break;\n\n      case \"NextPage\":\n        if (this.page < this.pagesCount) {\n          this.page++;\n        }\n        break;\n\n      case \"PrevPage\":\n        if (this.page > 1) {\n          this.page--;\n        }\n        break;\n\n      case \"LastPage\":\n        this.page = this.pagesCount;\n        break;\n\n      case \"FirstPage\":\n        this.page = 1;\n        break;\n\n      default:\n        break; // No action according to spec\n    }\n\n    this.eventBus.dispatch(\"namedaction\", {\n      source: this,\n      action,\n    });\n  }\n\n  /**\n   * @param {number} pageNum - page number.\n   * @param {Object} pageRef - reference to the page.\n   */\n  cachePageRef(pageNum, pageRef) {\n    if (!pageRef) {\n      return;\n    }\n    const refStr =\n      pageRef.gen === 0 ? `${pageRef.num}R` : `${pageRef.num}R${pageRef.gen}`;\n    this._pagesRefCache[refStr] = pageNum;\n  }\n\n  _cachedPageNumber(pageRef) {\n    const refStr =\n      pageRef.gen === 0 ? `${pageRef.num}R` : `${pageRef.num}R${pageRef.gen}`;\n    return (this._pagesRefCache && this._pagesRefCache[refStr]) || null;\n  }\n\n  /**\n   * @param {number} pageNumber\n   */\n  isPageVisible(pageNumber) {\n    return this.pdfViewer.isPageVisible(pageNumber);\n  }\n}\n\nfunction isValidExplicitDestination(dest) {\n  if (!Array.isArray(dest)) {\n    return false;\n  }\n  const destLength = dest.length;\n  if (destLength < 2) {\n    return false;\n  }\n  const page = dest[0];\n  if (\n    !(\n      typeof page === \"object\" &&\n      Number.isInteger(page.num) &&\n      Number.isInteger(page.gen)\n    ) &&\n    !(Number.isInteger(page) && page >= 0)\n  ) {\n    return false;\n  }\n  const zoom = dest[1];\n  if (!(typeof zoom === \"object\" && typeof zoom.name === \"string\")) {\n    return false;\n  }\n  let allowNull = true;\n  switch (zoom.name) {\n    case \"XYZ\":\n      if (destLength !== 5) {\n        return false;\n      }\n      break;\n    case \"Fit\":\n    case \"FitB\":\n      return destLength === 2;\n    case \"FitH\":\n    case \"FitBH\":\n    case \"FitV\":\n    case \"FitBV\":\n      if (destLength !== 3) {\n        return false;\n      }\n      break;\n    case \"FitR\":\n      if (destLength !== 6) {\n        return false;\n      }\n      allowNull = false;\n      break;\n    default:\n      return false;\n  }\n  for (let i = 2; i < destLength; i++) {\n    const param = dest[i];\n    if (!(typeof param === \"number\" || (allowNull && param === null))) {\n      return false;\n    }\n  }\n  return true;\n}\n\n/**\n * @implements {IPDFLinkService}\n */\nclass SimpleLinkService {\n  constructor() {\n    this.externalLinkTarget = null;\n    this.externalLinkRel = null;\n    this.externalLinkEnabled = true;\n    this._ignoreDestinationZoom = false;\n  }\n\n  /**\n   * @type {number}\n   */\n  get pagesCount() {\n    return 0;\n  }\n\n  /**\n   * @type {number}\n   */\n  get page() {\n    return 0;\n  }\n\n  /**\n   * @param {number} value\n   */\n  set page(value) {}\n\n  /**\n   * @type {number}\n   */\n  get rotation() {\n    return 0;\n  }\n\n  /**\n   * @param {number} value\n   */\n  set rotation(value) {}\n\n  /**\n   * @param dest - The PDF destination object.\n   */\n  navigateTo(dest) {}\n\n  /**\n   * @param dest - The PDF destination object.\n   * @returns {string} The hyperlink to the PDF object.\n   */\n  getDestinationHash(dest) {\n    return \"#\";\n  }\n\n  /**\n   * @param hash - The PDF parameters/hash.\n   * @returns {string} The hyperlink to the PDF object.\n   */\n  getAnchorUrl(hash) {\n    return \"#\";\n  }\n\n  /**\n   * @param {string} hash\n   */\n  setHash(hash) {}\n\n  /**\n   * @param {string} action\n   */\n  executeNamedAction(action) {}\n\n  /**\n   * @param {number} pageNum - page number.\n   * @param {Object} pageRef - reference to the page.\n   */\n  cachePageRef(pageNum, pageRef) {}\n\n  /**\n   * @param {number} pageNumber\n   */\n  isPageVisible(pageNumber) {\n    return true;\n  }\n}\n\nexport { PDFLinkService, SimpleLinkService };\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { renderTextLayer } from \"pdfjs-lib\";\n\nconst EXPAND_DIVS_TIMEOUT = 300; // ms\n\n/**\n * @typedef {Object} TextLayerBuilderOptions\n * @property {HTMLDivElement} textLayerDiv - The text layer container.\n * @property {EventBus} eventBus - The application event bus.\n * @property {number} pageIndex - The page index.\n * @property {PageViewport} viewport - The viewport of the text layer.\n * @property {PDFFindController} findController\n * @property {boolean} enhanceTextSelection - Option to turn on improved\n *   text selection.\n */\n\n/**\n * The text layer builder provides text selection functionality for the PDF.\n * It does this by creating overlay divs over the PDF's text. These divs\n * contain text that matches the PDF text they are overlaying. This object\n * also provides a way to highlight text that is being searched for.\n */\nclass TextLayerBuilder {\n  constructor({\n    textLayerDiv,\n    eventBus,\n    pageIndex,\n    viewport,\n    findController = null,\n    enhanceTextSelection = false,\n  }) {\n    this.textLayerDiv = textLayerDiv;\n    this.eventBus = eventBus;\n    this.textContent = null;\n    this.textContentItemsStr = [];\n    this.textContentStream = null;\n    this.renderingDone = false;\n    this.pageIdx = pageIndex;\n    this.pageNumber = this.pageIdx + 1;\n    this.matches = [];\n    this.viewport = viewport;\n    this.textDivs = [];\n    this.findController = findController;\n    this.textLayerRenderTask = null;\n    this.enhanceTextSelection = enhanceTextSelection;\n\n    this._onUpdateTextLayerMatches = null;\n    this._bindMouse();\n  }\n\n  /**\n   * @private\n   */\n  _finishRendering() {\n    this.renderingDone = true;\n\n    if (!this.enhanceTextSelection) {\n      const endOfContent = document.createElement(\"div\");\n      endOfContent.className = \"endOfContent\";\n      this.textLayerDiv.appendChild(endOfContent);\n    }\n\n    this.eventBus.dispatch(\"textlayerrendered\", {\n      source: this,\n      pageNumber: this.pageNumber,\n      numTextDivs: this.textDivs.length,\n    });\n  }\n\n  /**\n   * Renders the text layer.\n   *\n   * @param {number} [timeout] - Wait for a specified amount of milliseconds\n   *                             before rendering.\n   */\n  render(timeout = 0) {\n    if (!(this.textContent || this.textContentStream) || this.renderingDone) {\n      return;\n    }\n    this.cancel();\n\n    this.textDivs = [];\n    const textLayerFrag = document.createDocumentFragment();\n    this.textLayerRenderTask = renderTextLayer({\n      textContent: this.textContent,\n      textContentStream: this.textContentStream,\n      container: textLayerFrag,\n      viewport: this.viewport,\n      textDivs: this.textDivs,\n      textContentItemsStr: this.textContentItemsStr,\n      timeout,\n      enhanceTextSelection: this.enhanceTextSelection,\n    });\n    this.textLayerRenderTask.promise.then(\n      () => {\n        this.textLayerDiv.appendChild(textLayerFrag);\n        this._finishRendering();\n        this._updateMatches();\n      },\n      function (reason) {\n        // Cancelled or failed to render text layer; skipping errors.\n      }\n    );\n\n    if (!this._onUpdateTextLayerMatches) {\n      this._onUpdateTextLayerMatches = evt => {\n        if (evt.pageIndex === this.pageIdx || evt.pageIndex === -1) {\n          this._updateMatches();\n        }\n      };\n      this.eventBus._on(\n        \"updatetextlayermatches\",\n        this._onUpdateTextLayerMatches\n      );\n    }\n  }\n\n  /**\n   * Cancel rendering of the text layer.\n   */\n  cancel() {\n    if (this.textLayerRenderTask) {\n      this.textLayerRenderTask.cancel();\n      this.textLayerRenderTask = null;\n    }\n    if (this._onUpdateTextLayerMatches) {\n      this.eventBus._off(\n        \"updatetextlayermatches\",\n        this._onUpdateTextLayerMatches\n      );\n      this._onUpdateTextLayerMatches = null;\n    }\n  }\n\n  setTextContentStream(readableStream) {\n    this.cancel();\n    this.textContentStream = readableStream;\n  }\n\n  setTextContent(textContent) {\n    this.cancel();\n    this.textContent = textContent;\n  }\n\n  _convertMatches(matches, matchesLength) {\n    // Early exit if there is nothing to convert.\n    if (!matches) {\n      return [];\n    }\n    const { findController, textContentItemsStr } = this;\n\n    let i = 0,\n      iIndex = 0;\n    const end = textContentItemsStr.length - 1;\n    const queryLen = findController.state.query.length;\n    const result = [];\n\n    for (let m = 0, mm = matches.length; m < mm; m++) {\n      // Calculate the start position.\n      let matchIdx = matches[m];\n\n      // Loop over the divIdxs.\n      while (i !== end && matchIdx >= iIndex + textContentItemsStr[i].length) {\n        iIndex += textContentItemsStr[i].length;\n        i++;\n      }\n\n      if (i === textContentItemsStr.length) {\n        console.error(\"Could not find a matching mapping\");\n      }\n\n      const match = {\n        begin: {\n          divIdx: i,\n          offset: matchIdx - iIndex,\n        },\n      };\n\n      // Calculate the end position.\n      if (matchesLength) {\n        // Multiterm search.\n        matchIdx += matchesLength[m];\n      } else {\n        // Phrase search.\n        matchIdx += queryLen;\n      }\n\n      // Somewhat the same array as above, but use > instead of >= to get\n      // the end position right.\n      while (i !== end && matchIdx > iIndex + textContentItemsStr[i].length) {\n        iIndex += textContentItemsStr[i].length;\n        i++;\n      }\n\n      match.end = {\n        divIdx: i,\n        offset: matchIdx - iIndex,\n      };\n      result.push(match);\n    }\n    return result;\n  }\n\n  _renderMatches(matches) {\n    // Early exit if there is nothing to render.\n    if (matches.length === 0) {\n      return;\n    }\n    const { findController, pageIdx, textContentItemsStr, textDivs } = this;\n\n    const isSelectedPage = pageIdx === findController.selected.pageIdx;\n    const selectedMatchIdx = findController.selected.matchIdx;\n    const highlightAll = findController.state.highlightAll;\n    let prevEnd = null;\n    const infinity = {\n      divIdx: -1,\n      offset: undefined,\n    };\n\n    function beginText(begin, className) {\n      const divIdx = begin.divIdx;\n      textDivs[divIdx].textContent = \"\";\n      appendTextToDiv(divIdx, 0, begin.offset, className);\n    }\n\n    function appendTextToDiv(divIdx, fromOffset, toOffset, className) {\n      const div = textDivs[divIdx];\n      const content = textContentItemsStr[divIdx].substring(\n        fromOffset,\n        toOffset\n      );\n      const node = document.createTextNode(content);\n      if (className) {\n        const span = document.createElement(\"span\");\n        span.className = className;\n        span.appendChild(node);\n        div.appendChild(span);\n        return;\n      }\n      div.appendChild(node);\n    }\n\n    let i0 = selectedMatchIdx,\n      i1 = i0 + 1;\n    if (highlightAll) {\n      i0 = 0;\n      i1 = matches.length;\n    } else if (!isSelectedPage) {\n      // Not highlighting all and this isn't the selected page, so do nothing.\n      return;\n    }\n\n    for (let i = i0; i < i1; i++) {\n      const match = matches[i];\n      const begin = match.begin;\n      const end = match.end;\n      const isSelected = isSelectedPage && i === selectedMatchIdx;\n      const highlightSuffix = isSelected ? \" selected\" : \"\";\n\n      if (isSelected) {\n        // Attempt to scroll the selected match into view.\n        findController.scrollMatchIntoView({\n          element: textDivs[begin.divIdx],\n          pageIndex: pageIdx,\n          matchIndex: selectedMatchIdx,\n        });\n      }\n\n      // Match inside new div.\n      if (!prevEnd || begin.divIdx !== prevEnd.divIdx) {\n        // If there was a previous div, then add the text at the end.\n        if (prevEnd !== null) {\n          appendTextToDiv(prevEnd.divIdx, prevEnd.offset, infinity.offset);\n        }\n        // Clear the divs and set the content until the starting point.\n        beginText(begin);\n      } else {\n        appendTextToDiv(prevEnd.divIdx, prevEnd.offset, begin.offset);\n      }\n\n      if (begin.divIdx === end.divIdx) {\n        appendTextToDiv(\n          begin.divIdx,\n          begin.offset,\n          end.offset,\n          \"highlight\" + highlightSuffix\n        );\n      } else {\n        appendTextToDiv(\n          begin.divIdx,\n          begin.offset,\n          infinity.offset,\n          \"highlight begin\" + highlightSuffix\n        );\n        for (let n0 = begin.divIdx + 1, n1 = end.divIdx; n0 < n1; n0++) {\n          textDivs[n0].className = \"highlight middle\" + highlightSuffix;\n        }\n        beginText(end, \"highlight end\" + highlightSuffix);\n      }\n      prevEnd = end;\n    }\n\n    if (prevEnd) {\n      appendTextToDiv(prevEnd.divIdx, prevEnd.offset, infinity.offset);\n    }\n  }\n\n  _updateMatches() {\n    // Only show matches when all rendering is done.\n    if (!this.renderingDone) {\n      return;\n    }\n    const {\n      findController,\n      matches,\n      pageIdx,\n      textContentItemsStr,\n      textDivs,\n    } = this;\n    let clearedUntilDivIdx = -1;\n\n    // Clear all current matches.\n    for (let i = 0, ii = matches.length; i < ii; i++) {\n      const match = matches[i];\n      const begin = Math.max(clearedUntilDivIdx, match.begin.divIdx);\n      for (let n = begin, end = match.end.divIdx; n <= end; n++) {\n        const div = textDivs[n];\n        div.textContent = textContentItemsStr[n];\n        div.className = \"\";\n      }\n      clearedUntilDivIdx = match.end.divIdx + 1;\n    }\n\n    if (!findController || !findController.highlightMatches) {\n      return;\n    }\n    // Convert the matches on the `findController` into the match format\n    // used for the textLayer.\n    const pageMatches = findController.pageMatches[pageIdx] || null;\n    const pageMatchesLength = findController.pageMatchesLength[pageIdx] || null;\n\n    this.matches = this._convertMatches(pageMatches, pageMatchesLength);\n    this._renderMatches(this.matches);\n  }\n\n  /**\n   * Improves text selection by adding an additional div where the mouse was\n   * clicked. This reduces flickering of the content if the mouse is slowly\n   * dragged up or down.\n   *\n   * @private\n   */\n  _bindMouse() {\n    const div = this.textLayerDiv;\n    let expandDivsTimer = null;\n\n    div.addEventListener(\"mousedown\", evt => {\n      if (this.enhanceTextSelection && this.textLayerRenderTask) {\n        this.textLayerRenderTask.expandTextDivs(true);\n        if (\n          (typeof PDFJSDev === \"undefined\" || !PDFJSDev.test(\"MOZCENTRAL\")) &&\n          expandDivsTimer\n        ) {\n          clearTimeout(expandDivsTimer);\n          expandDivsTimer = null;\n        }\n        return;\n      }\n\n      const end = div.querySelector(\".endOfContent\");\n      if (!end) {\n        return;\n      }\n      if (typeof PDFJSDev === \"undefined\" || !PDFJSDev.test(\"MOZCENTRAL\")) {\n        // On non-Firefox browsers, the selection will feel better if the height\n        // of the `endOfContent` div is adjusted to start at mouse click\n        // location. This avoids flickering when the selection moves up.\n        // However it does not work when selection is started on empty space.\n        let adjustTop = evt.target !== div;\n        if (typeof PDFJSDev === \"undefined\" || PDFJSDev.test(\"GENERIC\")) {\n          adjustTop =\n            adjustTop &&\n            window\n              .getComputedStyle(end)\n              .getPropertyValue(\"-moz-user-select\") !== \"none\";\n        }\n        if (adjustTop) {\n          const divBounds = div.getBoundingClientRect();\n          const r = Math.max(0, (evt.pageY - divBounds.top) / divBounds.height);\n          end.style.top = (r * 100).toFixed(2) + \"%\";\n        }\n      }\n      end.classList.add(\"active\");\n    });\n\n    div.addEventListener(\"mouseup\", () => {\n      if (this.enhanceTextSelection && this.textLayerRenderTask) {\n        if (typeof PDFJSDev === \"undefined\" || !PDFJSDev.test(\"MOZCENTRAL\")) {\n          expandDivsTimer = setTimeout(() => {\n            if (this.textLayerRenderTask) {\n              this.textLayerRenderTask.expandTextDivs(false);\n            }\n            expandDivsTimer = null;\n          }, EXPAND_DIVS_TIMEOUT);\n        } else {\n          this.textLayerRenderTask.expandTextDivs(false);\n        }\n        return;\n      }\n\n      const end = div.querySelector(\".endOfContent\");\n      if (!end) {\n        return;\n      }\n      if (typeof PDFJSDev === \"undefined\" || !PDFJSDev.test(\"MOZCENTRAL\")) {\n        end.style.top = \"\";\n      }\n      end.classList.remove(\"active\");\n    });\n  }\n}\n\n/**\n * @implements IPDFTextLayerFactory\n */\nclass DefaultTextLayerFactory {\n  /**\n   * @param {HTMLDivElement} textLayerDiv\n   * @param {number} pageIndex\n   * @param {PageViewport} viewport\n   * @param {boolean} enhanceTextSelection\n   * @param {EventBus} eventBus\n   * @returns {TextLayerBuilder}\n   */\n  createTextLayerBuilder(\n    textLayerDiv,\n    pageIndex,\n    viewport,\n    enhanceTextSelection = false,\n    eventBus\n  ) {\n    return new TextLayerBuilder({\n      textLayerDiv,\n      pageIndex,\n      viewport,\n      enhanceTextSelection,\n      eventBus,\n    });\n  }\n}\n\nexport { TextLayerBuilder, DefaultTextLayerFactory };\n","/* Copyright 2013 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { createObjectURL, createValidAbsoluteUrl } from \"pdfjs-lib\";\nimport { viewerCompatibilityParams } from \"./viewer_compatibility.js\";\n\nif (typeof PDFJSDev !== \"undefined\" && !PDFJSDev.test(\"CHROME || GENERIC\")) {\n  throw new Error(\n    'Module \"pdfjs-web/download_manager\" shall not be used ' +\n      \"outside CHROME and GENERIC builds.\"\n  );\n}\n\nconst DISABLE_CREATE_OBJECT_URL =\n  viewerCompatibilityParams.disableCreateObjectURL || false;\n\nfunction download(blobUrl, filename) {\n  const a = document.createElement(\"a\");\n  if (!a.click) {\n    throw new Error('DownloadManager: \"a.click()\" is not supported.');\n  }\n  a.href = blobUrl;\n  a.target = \"_parent\";\n  // Use a.download if available. This increases the likelihood that\n  // the file is downloaded instead of opened by another PDF plugin.\n  if (\"download\" in a) {\n    a.download = filename;\n  }\n  // <a> must be in the document for IE and recent Firefox versions,\n  // otherwise .click() is ignored.\n  (document.body || document.documentElement).appendChild(a);\n  a.click();\n  a.remove();\n}\n\nclass DownloadManager {\n  constructor({ disableCreateObjectURL = DISABLE_CREATE_OBJECT_URL }) {\n    this.disableCreateObjectURL = disableCreateObjectURL;\n  }\n\n  downloadUrl(url, filename) {\n    if (!createValidAbsoluteUrl(url, \"http://example.com\")) {\n      return; // restricted/invalid URL\n    }\n    download(url + \"#pdfjs.action=download\", filename);\n  }\n\n  downloadData(data, filename, contentType) {\n    if (navigator.msSaveBlob) {\n      // IE10 and above\n      navigator.msSaveBlob(new Blob([data], { type: contentType }), filename);\n      return;\n    }\n    const blobUrl = createObjectURL(\n      data,\n      contentType,\n      this.disableCreateObjectURL\n    );\n    download(blobUrl, filename);\n  }\n\n  download(blob, url, filename) {\n    if (navigator.msSaveBlob) {\n      // IE10 / IE11\n      if (!navigator.msSaveBlob(blob, filename)) {\n        this.downloadUrl(url, filename);\n      }\n      return;\n    }\n\n    if (this.disableCreateObjectURL) {\n      // URL.createObjectURL is not supported\n      this.downloadUrl(url, filename);\n      return;\n    }\n\n    const blobUrl = URL.createObjectURL(blob);\n    download(blobUrl, filename);\n  }\n}\n\nexport { DownloadManager };\n","/* Copyright 2018 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nconst compatibilityParams = Object.create(null);\nif (typeof PDFJSDev === \"undefined\" || PDFJSDev.test(\"GENERIC\")) {\n  const userAgent =\n    (typeof navigator !== \"undefined\" && navigator.userAgent) || \"\";\n  const platform =\n    (typeof navigator !== \"undefined\" && navigator.platform) || \"\";\n  const maxTouchPoints =\n    (typeof navigator !== \"undefined\" && navigator.maxTouchPoints) || 1;\n\n  const isAndroid = /Android/.test(userAgent);\n  const isIE = /Trident/.test(userAgent);\n  const isIOS =\n    /\\b(iPad|iPhone|iPod)(?=;)/.test(userAgent) ||\n    (platform === \"MacIntel\" && maxTouchPoints > 1);\n  const isIOSChrome = /CriOS/.test(userAgent);\n\n  // Checks if possible to use URL.createObjectURL()\n  // Support: IE, Chrome on iOS\n  (function checkOnBlobSupport() {\n    // Sometimes IE and Chrome on iOS losing the data created with\n    // createObjectURL(), see issues #3977 and #8081.\n    if (isIE || isIOSChrome) {\n      compatibilityParams.disableCreateObjectURL = true;\n    }\n  })();\n\n  // Limit canvas size to 5 mega-pixels on mobile.\n  // Support: Android, iOS\n  (function checkCanvasSizeLimitation() {\n    if (isIOS || isAndroid) {\n      compatibilityParams.maxCanvasPixels = 5242880;\n    }\n  })();\n}\nconst viewerCompatibilityParams = Object.freeze(compatibilityParams);\n\nexport { viewerCompatibilityParams };\n","/* Copyright 2017 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport \"../external/webL10n/l10n.js\";\n\nconst webL10n = document.webL10n;\n\nclass GenericL10n {\n  constructor(lang) {\n    this._lang = lang;\n    this._ready = new Promise((resolve, reject) => {\n      webL10n.setLanguage(lang, () => {\n        resolve(webL10n);\n      });\n    });\n  }\n\n  async getLanguage() {\n    const l10n = await this._ready;\n    return l10n.getLanguage();\n  }\n\n  async getDirection() {\n    const l10n = await this._ready;\n    return l10n.getDirection();\n  }\n\n  async get(property, args, fallback) {\n    const l10n = await this._ready;\n    return l10n.get(property, args, fallback);\n  }\n\n  async translate(element) {\n    const l10n = await this._ready;\n    return l10n.translate(element);\n  }\n}\n\nexport { GenericL10n };\n","/**\n * Copyright (c) 2011-2013 Fabien Cazenave, Mozilla.\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n/*\n  Additional modifications for PDF.js project:\n    - Disables language initialization on page loading.\n    - Disables document translation on page loading.\n    - Removes consoleWarn and consoleLog and use console.log/warn directly.\n    - Removes window._ assignment.\n    - Remove compatibility code for OldIE.\n    - Replaces `String.prototype.substr()` with `String.prototype.substring()`.\n    - Removes `fireL10nReadyEvent` since the \"localized\" event it dispatches\n      is unused and may clash with an identically named event in the viewer.\n*/\n\n/*jshint browser: true, devel: true, es5: true, globalstrict: true */\n'use strict';\n\ndocument.webL10n = (function(window, document, undefined) {\n  var gL10nData = {};\n  var gTextData = '';\n  var gTextProp = 'textContent';\n  var gLanguage = '';\n  var gMacros = {};\n  var gReadyState = 'loading';\n\n\n  /**\n   * Synchronously loading l10n resources significantly minimizes flickering\n   * from displaying the app with non-localized strings and then updating the\n   * strings. Although this will block all script execution on this page, we\n   * expect that the l10n resources are available locally on flash-storage.\n   *\n   * As synchronous XHR is generally considered as a bad idea, we're still\n   * loading l10n resources asynchronously -- but we keep this in a setting,\n   * just in case... and applications using this library should hide their\n   * content until the `localized' event happens.\n   */\n\n  var gAsyncResourceLoading = true; // read-only\n\n\n  /**\n   * DOM helpers for the so-called \"HTML API\".\n   *\n   * These functions are written for modern browsers. For old versions of IE,\n   * they're overridden in the 'startup' section at the end of this file.\n   */\n\n  function getL10nResourceLinks() {\n    return document.querySelectorAll('link[type=\"application/l10n\"]');\n  }\n\n  function getL10nDictionary() {\n    var script = document.querySelector('script[type=\"application/l10n\"]');\n    // TODO: support multiple and external JSON dictionaries\n    return script ? JSON.parse(script.innerHTML) : null;\n  }\n\n  function getTranslatableChildren(element) {\n    return element ? element.querySelectorAll('*[data-l10n-id]') : [];\n  }\n\n  function getL10nAttributes(element) {\n    if (!element)\n      return {};\n\n    var l10nId = element.getAttribute('data-l10n-id');\n    var l10nArgs = element.getAttribute('data-l10n-args');\n    var args = {};\n    if (l10nArgs) {\n      try {\n        args = JSON.parse(l10nArgs);\n      } catch (e) {\n        console.warn('could not parse arguments for #' + l10nId);\n      }\n    }\n    return { id: l10nId, args: args };\n  }\n\n  function xhrLoadText(url, onSuccess, onFailure) {\n    onSuccess = onSuccess || function _onSuccess(data) {};\n    onFailure = onFailure || function _onFailure() {};\n\n    var xhr = new XMLHttpRequest();\n    xhr.open('GET', url, gAsyncResourceLoading);\n    if (xhr.overrideMimeType) {\n      xhr.overrideMimeType('text/plain; charset=utf-8');\n    }\n    xhr.onreadystatechange = function() {\n      if (xhr.readyState == 4) {\n        if (xhr.status == 200 || xhr.status === 0) {\n          onSuccess(xhr.responseText);\n        } else {\n          onFailure();\n        }\n      }\n    };\n    xhr.onerror = onFailure;\n    xhr.ontimeout = onFailure;\n\n    // in Firefox OS with the app:// protocol, trying to XHR a non-existing\n    // URL will raise an exception here -- hence this ugly try...catch.\n    try {\n      xhr.send(null);\n    } catch (e) {\n      onFailure();\n    }\n  }\n\n\n  /**\n   * l10n resource parser:\n   *  - reads (async XHR) the l10n resource matching `lang';\n   *  - imports linked resources (synchronously) when specified;\n   *  - parses the text data (fills `gL10nData' and `gTextData');\n   *  - triggers success/failure callbacks when done.\n   *\n   * @param {string} href\n   *    URL of the l10n resource to parse.\n   *\n   * @param {string} lang\n   *    locale (language) to parse. Must be a lowercase string.\n   *\n   * @param {Function} successCallback\n   *    triggered when the l10n resource has been successfully parsed.\n   *\n   * @param {Function} failureCallback\n   *    triggered when the an error has occurred.\n   *\n   * @return {void}\n   *    uses the following global variables: gL10nData, gTextData, gTextProp.\n   */\n\n  function parseResource(href, lang, successCallback, failureCallback) {\n    var baseURL = href.replace(/[^\\/]*$/, '') || './';\n\n    // handle escaped characters (backslashes) in a string\n    function evalString(text) {\n      if (text.lastIndexOf('\\\\') < 0)\n        return text;\n      return text.replace(/\\\\\\\\/g, '\\\\')\n                 .replace(/\\\\n/g, '\\n')\n                 .replace(/\\\\r/g, '\\r')\n                 .replace(/\\\\t/g, '\\t')\n                 .replace(/\\\\b/g, '\\b')\n                 .replace(/\\\\f/g, '\\f')\n                 .replace(/\\\\{/g, '{')\n                 .replace(/\\\\}/g, '}')\n                 .replace(/\\\\\"/g, '\"')\n                 .replace(/\\\\'/g, \"'\");\n    }\n\n    // parse *.properties text data into an l10n dictionary\n    // If gAsyncResourceLoading is false, then the callback will be called\n    // synchronously. Otherwise it is called asynchronously.\n    function parseProperties(text, parsedPropertiesCallback) {\n      var dictionary = {};\n\n      // token expressions\n      var reBlank = /^\\s*|\\s*$/;\n      var reComment = /^\\s*#|^\\s*$/;\n      var reSection = /^\\s*\\[(.*)\\]\\s*$/;\n      var reImport = /^\\s*@import\\s+url\\((.*)\\)\\s*$/i;\n      var reSplit = /^([^=\\s]*)\\s*=\\s*(.+)$/; // TODO: escape EOLs with '\\'\n\n      // parse the *.properties file into an associative array\n      function parseRawLines(rawText, extendedSyntax, parsedRawLinesCallback) {\n        var entries = rawText.replace(reBlank, '').split(/[\\r\\n]+/);\n        var currentLang = '*';\n        var genericLang = lang.split('-', 1)[0];\n        var skipLang = false;\n        var match = '';\n\n        function nextEntry() {\n          // Use infinite loop instead of recursion to avoid reaching the\n          // maximum recursion limit for content with many lines.\n          while (true) {\n            if (!entries.length) {\n              parsedRawLinesCallback();\n              return;\n            }\n            var line = entries.shift();\n\n            // comment or blank line?\n            if (reComment.test(line))\n              continue;\n\n            // the extended syntax supports [lang] sections and @import rules\n            if (extendedSyntax) {\n              match = reSection.exec(line);\n              if (match) { // section start?\n                // RFC 4646, section 4.4, \"All comparisons MUST be performed\n                // in a case-insensitive manner.\"\n\n                currentLang = match[1].toLowerCase();\n                skipLang = (currentLang !== '*') &&\n                    (currentLang !== lang) && (currentLang !== genericLang);\n                continue;\n              } else if (skipLang) {\n                continue;\n              }\n              match = reImport.exec(line);\n              if (match) { // @import rule?\n                loadImport(baseURL + match[1], nextEntry);\n                return;\n              }\n            }\n\n            // key-value pair\n            var tmp = line.match(reSplit);\n            if (tmp && tmp.length == 3) {\n              dictionary[tmp[1]] = evalString(tmp[2]);\n            }\n          }\n        }\n        nextEntry();\n      }\n\n      // import another *.properties file\n      function loadImport(url, callback) {\n        xhrLoadText(url, function(content) {\n          parseRawLines(content, false, callback); // don't allow recursive imports\n        }, function () {\n          console.warn(url + ' not found.');\n          callback();\n        });\n      }\n\n      // fill the dictionary\n      parseRawLines(text, true, function() {\n        parsedPropertiesCallback(dictionary);\n      });\n    }\n\n    // load and parse l10n data (warning: global variables are used here)\n    xhrLoadText(href, function(response) {\n      gTextData += response; // mostly for debug\n\n      // parse *.properties text data into an l10n dictionary\n      parseProperties(response, function(data) {\n\n        // find attribute descriptions, if any\n        for (var key in data) {\n          var id, prop, index = key.lastIndexOf('.');\n          if (index > 0) { // an attribute has been specified\n            id = key.substring(0, index);\n            prop = key.substring(index + 1);\n          } else { // no attribute: assuming text content by default\n            id = key;\n            prop = gTextProp;\n          }\n          if (!gL10nData[id]) {\n            gL10nData[id] = {};\n          }\n          gL10nData[id][prop] = data[key];\n        }\n\n        // trigger callback\n        if (successCallback) {\n          successCallback();\n        }\n      });\n    }, failureCallback);\n  }\n\n  // load and parse all resources for the specified locale\n  function loadLocale(lang, callback) {\n    // RFC 4646, section 2.1 states that language tags have to be treated as\n    // case-insensitive. Convert to lowercase for case-insensitive comparisons.\n    if (lang) {\n      lang = lang.toLowerCase();\n    }\n\n    callback = callback || function _callback() {};\n\n    clear();\n    gLanguage = lang;\n\n    // check all <link type=\"application/l10n\" href=\"...\" /> nodes\n    // and load the resource files\n    var langLinks = getL10nResourceLinks();\n    var langCount = langLinks.length;\n    if (langCount === 0) {\n      // we might have a pre-compiled dictionary instead\n      var dict = getL10nDictionary();\n      if (dict && dict.locales && dict.default_locale) {\n        console.log('using the embedded JSON directory, early way out');\n        gL10nData = dict.locales[lang];\n        if (!gL10nData) {\n          var defaultLocale = dict.default_locale.toLowerCase();\n          for (var anyCaseLang in dict.locales) {\n            anyCaseLang = anyCaseLang.toLowerCase();\n            if (anyCaseLang === lang) {\n              gL10nData = dict.locales[lang];\n              break;\n            } else if (anyCaseLang === defaultLocale) {\n              gL10nData = dict.locales[defaultLocale];\n            }\n          }\n        }\n        callback();\n      } else {\n        console.log('no resource to load, early way out');\n      }\n      // early way out\n      gReadyState = 'complete';\n      return;\n    }\n\n    // start the callback when all resources are loaded\n    var onResourceLoaded = null;\n    var gResourceCount = 0;\n    onResourceLoaded = function() {\n      gResourceCount++;\n      if (gResourceCount >= langCount) {\n        callback();\n        gReadyState = 'complete';\n      }\n    };\n\n    // load all resource files\n    function L10nResourceLink(link) {\n      var href = link.href;\n      // Note: If |gAsyncResourceLoading| is false, then the following callbacks\n      // are synchronously called.\n      this.load = function(lang, callback) {\n        parseResource(href, lang, callback, function() {\n          console.warn(href + ' not found.');\n          // lang not found, used default resource instead\n          console.warn('\"' + lang + '\" resource not found');\n          gLanguage = '';\n          // Resource not loaded, but we still need to call the callback.\n          callback();\n        });\n      };\n    }\n\n    for (var i = 0; i < langCount; i++) {\n      var resource = new L10nResourceLink(langLinks[i]);\n      resource.load(lang, onResourceLoaded);\n    }\n  }\n\n  // clear all l10n data\n  function clear() {\n    gL10nData = {};\n    gTextData = '';\n    gLanguage = '';\n    // TODO: clear all non predefined macros.\n    // There's no such macro /yet/ but we're planning to have some...\n  }\n\n\n  /**\n   * Get rules for plural forms (shared with JetPack), see:\n   * http://unicode.org/repos/cldr-tmp/trunk/diff/supplemental/language_plural_rules.html\n   * https://github.com/mozilla/addon-sdk/blob/master/python-lib/plural-rules-generator.p\n   *\n   * @param {string} lang\n   *    locale (language) used.\n   *\n   * @return {Function}\n   *    returns a function that gives the plural form name for a given integer:\n   *       var fun = getPluralRules('en');\n   *       fun(1)    -> 'one'\n   *       fun(0)    -> 'other'\n   *       fun(1000) -> 'other'.\n   */\n\n  function getPluralRules(lang) {\n    var locales2rules = {\n      'af': 3,\n      'ak': 4,\n      'am': 4,\n      'ar': 1,\n      'asa': 3,\n      'az': 0,\n      'be': 11,\n      'bem': 3,\n      'bez': 3,\n      'bg': 3,\n      'bh': 4,\n      'bm': 0,\n      'bn': 3,\n      'bo': 0,\n      'br': 20,\n      'brx': 3,\n      'bs': 11,\n      'ca': 3,\n      'cgg': 3,\n      'chr': 3,\n      'cs': 12,\n      'cy': 17,\n      'da': 3,\n      'de': 3,\n      'dv': 3,\n      'dz': 0,\n      'ee': 3,\n      'el': 3,\n      'en': 3,\n      'eo': 3,\n      'es': 3,\n      'et': 3,\n      'eu': 3,\n      'fa': 0,\n      'ff': 5,\n      'fi': 3,\n      'fil': 4,\n      'fo': 3,\n      'fr': 5,\n      'fur': 3,\n      'fy': 3,\n      'ga': 8,\n      'gd': 24,\n      'gl': 3,\n      'gsw': 3,\n      'gu': 3,\n      'guw': 4,\n      'gv': 23,\n      'ha': 3,\n      'haw': 3,\n      'he': 2,\n      'hi': 4,\n      'hr': 11,\n      'hu': 0,\n      'id': 0,\n      'ig': 0,\n      'ii': 0,\n      'is': 3,\n      'it': 3,\n      'iu': 7,\n      'ja': 0,\n      'jmc': 3,\n      'jv': 0,\n      'ka': 0,\n      'kab': 5,\n      'kaj': 3,\n      'kcg': 3,\n      'kde': 0,\n      'kea': 0,\n      'kk': 3,\n      'kl': 3,\n      'km': 0,\n      'kn': 0,\n      'ko': 0,\n      'ksb': 3,\n      'ksh': 21,\n      'ku': 3,\n      'kw': 7,\n      'lag': 18,\n      'lb': 3,\n      'lg': 3,\n      'ln': 4,\n      'lo': 0,\n      'lt': 10,\n      'lv': 6,\n      'mas': 3,\n      'mg': 4,\n      'mk': 16,\n      'ml': 3,\n      'mn': 3,\n      'mo': 9,\n      'mr': 3,\n      'ms': 0,\n      'mt': 15,\n      'my': 0,\n      'nah': 3,\n      'naq': 7,\n      'nb': 3,\n      'nd': 3,\n      'ne': 3,\n      'nl': 3,\n      'nn': 3,\n      'no': 3,\n      'nr': 3,\n      'nso': 4,\n      'ny': 3,\n      'nyn': 3,\n      'om': 3,\n      'or': 3,\n      'pa': 3,\n      'pap': 3,\n      'pl': 13,\n      'ps': 3,\n      'pt': 3,\n      'rm': 3,\n      'ro': 9,\n      'rof': 3,\n      'ru': 11,\n      'rwk': 3,\n      'sah': 0,\n      'saq': 3,\n      'se': 7,\n      'seh': 3,\n      'ses': 0,\n      'sg': 0,\n      'sh': 11,\n      'shi': 19,\n      'sk': 12,\n      'sl': 14,\n      'sma': 7,\n      'smi': 7,\n      'smj': 7,\n      'smn': 7,\n      'sms': 7,\n      'sn': 3,\n      'so': 3,\n      'sq': 3,\n      'sr': 11,\n      'ss': 3,\n      'ssy': 3,\n      'st': 3,\n      'sv': 3,\n      'sw': 3,\n      'syr': 3,\n      'ta': 3,\n      'te': 3,\n      'teo': 3,\n      'th': 0,\n      'ti': 4,\n      'tig': 3,\n      'tk': 3,\n      'tl': 4,\n      'tn': 3,\n      'to': 0,\n      'tr': 0,\n      'ts': 3,\n      'tzm': 22,\n      'uk': 11,\n      'ur': 3,\n      've': 3,\n      'vi': 0,\n      'vun': 3,\n      'wa': 4,\n      'wae': 3,\n      'wo': 0,\n      'xh': 3,\n      'xog': 3,\n      'yo': 0,\n      'zh': 0,\n      'zu': 3\n    };\n\n    // utility functions for plural rules methods\n    function isIn(n, list) {\n      return list.indexOf(n) !== -1;\n    }\n    function isBetween(n, start, end) {\n      return start <= n && n <= end;\n    }\n\n    // list of all plural rules methods:\n    // map an integer to the plural form name to use\n    var pluralRules = {\n      '0': function(n) {\n        return 'other';\n      },\n      '1': function(n) {\n        if ((isBetween((n % 100), 3, 10)))\n          return 'few';\n        if (n === 0)\n          return 'zero';\n        if ((isBetween((n % 100), 11, 99)))\n          return 'many';\n        if (n == 2)\n          return 'two';\n        if (n == 1)\n          return 'one';\n        return 'other';\n      },\n      '2': function(n) {\n        if (n !== 0 && (n % 10) === 0)\n          return 'many';\n        if (n == 2)\n          return 'two';\n        if (n == 1)\n          return 'one';\n        return 'other';\n      },\n      '3': function(n) {\n        if (n == 1)\n          return 'one';\n        return 'other';\n      },\n      '4': function(n) {\n        if ((isBetween(n, 0, 1)))\n          return 'one';\n        return 'other';\n      },\n      '5': function(n) {\n        if ((isBetween(n, 0, 2)) && n != 2)\n          return 'one';\n        return 'other';\n      },\n      '6': function(n) {\n        if (n === 0)\n          return 'zero';\n        if ((n % 10) == 1 && (n % 100) != 11)\n          return 'one';\n        return 'other';\n      },\n      '7': function(n) {\n        if (n == 2)\n          return 'two';\n        if (n == 1)\n          return 'one';\n        return 'other';\n      },\n      '8': function(n) {\n        if ((isBetween(n, 3, 6)))\n          return 'few';\n        if ((isBetween(n, 7, 10)))\n          return 'many';\n        if (n == 2)\n          return 'two';\n        if (n == 1)\n          return 'one';\n        return 'other';\n      },\n      '9': function(n) {\n        if (n === 0 || n != 1 && (isBetween((n % 100), 1, 19)))\n          return 'few';\n        if (n == 1)\n          return 'one';\n        return 'other';\n      },\n      '10': function(n) {\n        if ((isBetween((n % 10), 2, 9)) && !(isBetween((n % 100), 11, 19)))\n          return 'few';\n        if ((n % 10) == 1 && !(isBetween((n % 100), 11, 19)))\n          return 'one';\n        return 'other';\n      },\n      '11': function(n) {\n        if ((isBetween((n % 10), 2, 4)) && !(isBetween((n % 100), 12, 14)))\n          return 'few';\n        if ((n % 10) === 0 ||\n            (isBetween((n % 10), 5, 9)) ||\n            (isBetween((n % 100), 11, 14)))\n          return 'many';\n        if ((n % 10) == 1 && (n % 100) != 11)\n          return 'one';\n        return 'other';\n      },\n      '12': function(n) {\n        if ((isBetween(n, 2, 4)))\n          return 'few';\n        if (n == 1)\n          return 'one';\n        return 'other';\n      },\n      '13': function(n) {\n        if ((isBetween((n % 10), 2, 4)) && !(isBetween((n % 100), 12, 14)))\n          return 'few';\n        if (n != 1 && (isBetween((n % 10), 0, 1)) ||\n            (isBetween((n % 10), 5, 9)) ||\n            (isBetween((n % 100), 12, 14)))\n          return 'many';\n        if (n == 1)\n          return 'one';\n        return 'other';\n      },\n      '14': function(n) {\n        if ((isBetween((n % 100), 3, 4)))\n          return 'few';\n        if ((n % 100) == 2)\n          return 'two';\n        if ((n % 100) == 1)\n          return 'one';\n        return 'other';\n      },\n      '15': function(n) {\n        if (n === 0 || (isBetween((n % 100), 2, 10)))\n          return 'few';\n        if ((isBetween((n % 100), 11, 19)))\n          return 'many';\n        if (n == 1)\n          return 'one';\n        return 'other';\n      },\n      '16': function(n) {\n        if ((n % 10) == 1 && n != 11)\n          return 'one';\n        return 'other';\n      },\n      '17': function(n) {\n        if (n == 3)\n          return 'few';\n        if (n === 0)\n          return 'zero';\n        if (n == 6)\n          return 'many';\n        if (n == 2)\n          return 'two';\n        if (n == 1)\n          return 'one';\n        return 'other';\n      },\n      '18': function(n) {\n        if (n === 0)\n          return 'zero';\n        if ((isBetween(n, 0, 2)) && n !== 0 && n != 2)\n          return 'one';\n        return 'other';\n      },\n      '19': function(n) {\n        if ((isBetween(n, 2, 10)))\n          return 'few';\n        if ((isBetween(n, 0, 1)))\n          return 'one';\n        return 'other';\n      },\n      '20': function(n) {\n        if ((isBetween((n % 10), 3, 4) || ((n % 10) == 9)) && !(\n            isBetween((n % 100), 10, 19) ||\n            isBetween((n % 100), 70, 79) ||\n            isBetween((n % 100), 90, 99)\n            ))\n          return 'few';\n        if ((n % 1000000) === 0 && n !== 0)\n          return 'many';\n        if ((n % 10) == 2 && !isIn((n % 100), [12, 72, 92]))\n          return 'two';\n        if ((n % 10) == 1 && !isIn((n % 100), [11, 71, 91]))\n          return 'one';\n        return 'other';\n      },\n      '21': function(n) {\n        if (n === 0)\n          return 'zero';\n        if (n == 1)\n          return 'one';\n        return 'other';\n      },\n      '22': function(n) {\n        if ((isBetween(n, 0, 1)) || (isBetween(n, 11, 99)))\n          return 'one';\n        return 'other';\n      },\n      '23': function(n) {\n        if ((isBetween((n % 10), 1, 2)) || (n % 20) === 0)\n          return 'one';\n        return 'other';\n      },\n      '24': function(n) {\n        if ((isBetween(n, 3, 10) || isBetween(n, 13, 19)))\n          return 'few';\n        if (isIn(n, [2, 12]))\n          return 'two';\n        if (isIn(n, [1, 11]))\n          return 'one';\n        return 'other';\n      }\n    };\n\n    // return a function that gives the plural form name for a given integer\n    var index = locales2rules[lang.replace(/-.*$/, '')];\n    if (!(index in pluralRules)) {\n      console.warn('plural form unknown for [' + lang + ']');\n      return function() { return 'other'; };\n    }\n    return pluralRules[index];\n  }\n\n  // pre-defined 'plural' macro\n  gMacros.plural = function(str, param, key, prop) {\n    var n = parseFloat(param);\n    if (isNaN(n))\n      return str;\n\n    // TODO: support other properties (l20n still doesn't...)\n    if (prop != gTextProp)\n      return str;\n\n    // initialize _pluralRules\n    if (!gMacros._pluralRules) {\n      gMacros._pluralRules = getPluralRules(gLanguage);\n    }\n    var index = '[' + gMacros._pluralRules(n) + ']';\n\n    // try to find a [zero|one|two] key if it's defined\n    if (n === 0 && (key + '[zero]') in gL10nData) {\n      str = gL10nData[key + '[zero]'][prop];\n    } else if (n == 1 && (key + '[one]') in gL10nData) {\n      str = gL10nData[key + '[one]'][prop];\n    } else if (n == 2 && (key + '[two]') in gL10nData) {\n      str = gL10nData[key + '[two]'][prop];\n    } else if ((key + index) in gL10nData) {\n      str = gL10nData[key + index][prop];\n    } else if ((key + '[other]') in gL10nData) {\n      str = gL10nData[key + '[other]'][prop];\n    }\n\n    return str;\n  };\n\n\n  /**\n   * l10n dictionary functions\n   */\n\n  // fetch an l10n object, warn if not found, apply `args' if possible\n  function getL10nData(key, args, fallback) {\n    var data = gL10nData[key];\n    if (!data) {\n      console.warn('#' + key + ' is undefined.');\n      if (!fallback) {\n        return null;\n      }\n      data = fallback;\n    }\n\n    /** This is where l10n expressions should be processed.\n      * The plan is to support C-style expressions from the l20n project;\n      * until then, only two kinds of simple expressions are supported:\n      *   {[ index ]} and {{ arguments }}.\n      */\n    var rv = {};\n    for (var prop in data) {\n      var str = data[prop];\n      str = substIndexes(str, args, key, prop);\n      str = substArguments(str, args, key);\n      rv[prop] = str;\n    }\n    return rv;\n  }\n\n  // replace {[macros]} with their values\n  function substIndexes(str, args, key, prop) {\n    var reIndex = /\\{\\[\\s*([a-zA-Z]+)\\(([a-zA-Z]+)\\)\\s*\\]\\}/;\n    var reMatch = reIndex.exec(str);\n    if (!reMatch || !reMatch.length)\n      return str;\n\n    // an index/macro has been found\n    // Note: at the moment, only one parameter is supported\n    var macroName = reMatch[1];\n    var paramName = reMatch[2];\n    var param;\n    if (args && paramName in args) {\n      param = args[paramName];\n    } else if (paramName in gL10nData) {\n      param = gL10nData[paramName];\n    }\n\n    // there's no macro parser yet: it has to be defined in gMacros\n    if (macroName in gMacros) {\n      var macro = gMacros[macroName];\n      str = macro(str, param, key, prop);\n    }\n    return str;\n  }\n\n  // replace {{arguments}} with their values\n  function substArguments(str, args, key) {\n    var reArgs = /\\{\\{\\s*(.+?)\\s*\\}\\}/g;\n    return str.replace(reArgs, function(matched_text, arg) {\n      if (args && arg in args) {\n        return args[arg];\n      }\n      if (arg in gL10nData) {\n        return gL10nData[arg];\n      }\n      console.log('argument {{' + arg + '}} for #' + key + ' is undefined.');\n      return matched_text;\n    });\n  }\n\n  // translate an HTML element\n  function translateElement(element) {\n    var l10n = getL10nAttributes(element);\n    if (!l10n.id)\n      return;\n\n    // get the related l10n object\n    var data = getL10nData(l10n.id, l10n.args);\n    if (!data) {\n      console.warn('#' + l10n.id + ' is undefined.');\n      return;\n    }\n\n    // translate element (TODO: security checks?)\n    if (data[gTextProp]) { // XXX\n      if (getChildElementCount(element) === 0) {\n        element[gTextProp] = data[gTextProp];\n      } else {\n        // this element has element children: replace the content of the first\n        // (non-empty) child textNode and clear other child textNodes\n        var children = element.childNodes;\n        var found = false;\n        for (var i = 0, l = children.length; i < l; i++) {\n          if (children[i].nodeType === 3 && /\\S/.test(children[i].nodeValue)) {\n            if (found) {\n              children[i].nodeValue = '';\n            } else {\n              children[i].nodeValue = data[gTextProp];\n              found = true;\n            }\n          }\n        }\n        // if no (non-empty) textNode is found, insert a textNode before the\n        // first element child.\n        if (!found) {\n          var textNode = document.createTextNode(data[gTextProp]);\n          element.insertBefore(textNode, element.firstChild);\n        }\n      }\n      delete data[gTextProp];\n    }\n\n    for (var k in data) {\n      element[k] = data[k];\n    }\n  }\n\n  // webkit browsers don't currently support 'children' on SVG elements...\n  function getChildElementCount(element) {\n    if (element.children) {\n      return element.children.length;\n    }\n    if (typeof element.childElementCount !== 'undefined') {\n      return element.childElementCount;\n    }\n    var count = 0;\n    for (var i = 0; i < element.childNodes.length; i++) {\n      count += element.nodeType === 1 ? 1 : 0;\n    }\n    return count;\n  }\n\n  // translate an HTML subtree\n  function translateFragment(element) {\n    element = element || document.documentElement;\n\n    // check all translatable children (= w/ a `data-l10n-id' attribute)\n    var children = getTranslatableChildren(element);\n    var elementCount = children.length;\n    for (var i = 0; i < elementCount; i++) {\n      translateElement(children[i]);\n    }\n\n    // translate element itself if necessary\n    translateElement(element);\n  }\n\n  return {\n    // get a localized string\n    get: function(key, args, fallbackString) {\n      var index = key.lastIndexOf('.');\n      var prop = gTextProp;\n      if (index > 0) { // An attribute has been specified\n        prop = key.substring(index + 1);\n        key = key.substring(0, index);\n      }\n      var fallback;\n      if (fallbackString) {\n        fallback = {};\n        fallback[prop] = fallbackString;\n      }\n      var data = getL10nData(key, args, fallback);\n      if (data && prop in data) {\n        return data[prop];\n      }\n      return '{{' + key + '}}';\n    },\n\n    // debug\n    getData: function() { return gL10nData; },\n    getText: function() { return gTextData; },\n\n    // get|set the document language\n    getLanguage: function() { return gLanguage; },\n    setLanguage: function(lang, callback) {\n      loadLocale(lang, function() {\n        if (callback)\n          callback();\n      });\n    },\n\n    // get the direction (ltr|rtl) of the current language\n    getDirection: function() {\n      // http://www.w3.org/International/questions/qa-scripts\n      // Arabic, Hebrew, Farsi, Pashto, Urdu\n      var rtlList = ['ar', 'he', 'fa', 'ps', 'ur'];\n      var shortCode = gLanguage.split('-', 1)[0];\n      return (rtlList.indexOf(shortCode) >= 0) ? 'rtl' : 'ltr';\n    },\n\n    // translate an element or document fragment\n    translate: translateFragment,\n\n    // this can be used to prevent race conditions\n    getReadyState: function() { return gReadyState; },\n    ready: function(callback) {\n      if (!callback) {\n        return;\n      } else if (gReadyState == 'complete' || gReadyState == 'interactive') {\n        window.setTimeout(function() {\n          callback();\n        });\n      } else if (document.addEventListener) {\n        document.addEventListener('localized', function once() {\n          document.removeEventListener('localized', once);\n          callback();\n        });\n      }\n    }\n  };\n}) (window, document);\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { createPromiseCapability } from \"pdfjs-lib\";\nimport { getCharacterType } from \"./pdf_find_utils.js\";\nimport { scrollIntoView } from \"./ui_utils.js\";\n\nconst FindState = {\n  FOUND: 0,\n  NOT_FOUND: 1,\n  WRAPPED: 2,\n  PENDING: 3,\n};\n\nconst FIND_TIMEOUT = 250; // ms\nconst MATCH_SCROLL_OFFSET_TOP = -50; // px\nconst MATCH_SCROLL_OFFSET_LEFT = -400; // px\n\nconst CHARACTERS_TO_NORMALIZE = {\n  \"\\u2018\": \"'\", // Left single quotation mark\n  \"\\u2019\": \"'\", // Right single quotation mark\n  \"\\u201A\": \"'\", // Single low-9 quotation mark\n  \"\\u201B\": \"'\", // Single high-reversed-9 quotation mark\n  \"\\u201C\": '\"', // Left double quotation mark\n  \"\\u201D\": '\"', // Right double quotation mark\n  \"\\u201E\": '\"', // Double low-9 quotation mark\n  \"\\u201F\": '\"', // Double high-reversed-9 quotation mark\n  \"\\u00BC\": \"1/4\", // Vulgar fraction one quarter\n  \"\\u00BD\": \"1/2\", // Vulgar fraction one half\n  \"\\u00BE\": \"3/4\", // Vulgar fraction three quarters\n};\n\nlet normalizationRegex = null;\nfunction normalize(text) {\n  if (!normalizationRegex) {\n    // Compile the regular expression for text normalization once.\n    const replace = Object.keys(CHARACTERS_TO_NORMALIZE).join(\"\");\n    normalizationRegex = new RegExp(`[${replace}]`, \"g\");\n  }\n  return text.replace(normalizationRegex, function (ch) {\n    return CHARACTERS_TO_NORMALIZE[ch];\n  });\n}\n\n/**\n * @typedef {Object} PDFFindControllerOptions\n * @property {IPDFLinkService} linkService - The navigation/linking service.\n * @property {EventBus} eventBus - The application event bus.\n */\n\n/**\n * Provides search functionality to find a given string in a PDF document.\n */\nclass PDFFindController {\n  /**\n   * @param {PDFFindControllerOptions} options\n   */\n  constructor({ linkService, eventBus }) {\n    this._linkService = linkService;\n    this._eventBus = eventBus;\n\n    this._reset();\n    eventBus._on(\"findbarclose\", this._onFindBarClose.bind(this));\n  }\n\n  get highlightMatches() {\n    return this._highlightMatches;\n  }\n\n  get pageMatches() {\n    return this._pageMatches;\n  }\n\n  get pageMatchesLength() {\n    return this._pageMatchesLength;\n  }\n\n  get selected() {\n    return this._selected;\n  }\n\n  get state() {\n    return this._state;\n  }\n\n  /**\n   * Set a reference to the PDF document in order to search it.\n   * Note that searching is not possible if this method is not called.\n   *\n   * @param {PDFDocumentProxy} pdfDocument - The PDF document to search.\n   */\n  setDocument(pdfDocument) {\n    if (this._pdfDocument) {\n      this._reset();\n    }\n    if (!pdfDocument) {\n      return;\n    }\n    this._pdfDocument = pdfDocument;\n    this._firstPageCapability.resolve();\n  }\n\n  executeCommand(cmd, state) {\n    if (!state) {\n      return;\n    }\n    const pdfDocument = this._pdfDocument;\n\n    if (this._state === null || this._shouldDirtyMatch(cmd, state)) {\n      this._dirtyMatch = true;\n    }\n    this._state = state;\n    if (cmd !== \"findhighlightallchange\") {\n      this._updateUIState(FindState.PENDING);\n    }\n\n    this._firstPageCapability.promise.then(() => {\n      // If the document was closed before searching began, or if the search\n      // operation was relevant for a previously opened document, do nothing.\n      if (\n        !this._pdfDocument ||\n        (pdfDocument && this._pdfDocument !== pdfDocument)\n      ) {\n        return;\n      }\n      this._extractText();\n\n      const findbarClosed = !this._highlightMatches;\n      const pendingTimeout = !!this._findTimeout;\n\n      if (this._findTimeout) {\n        clearTimeout(this._findTimeout);\n        this._findTimeout = null;\n      }\n      if (cmd === \"find\") {\n        // Trigger the find action with a small delay to avoid starting the\n        // search when the user is still typing (saving resources).\n        this._findTimeout = setTimeout(() => {\n          this._nextMatch();\n          this._findTimeout = null;\n        }, FIND_TIMEOUT);\n      } else if (this._dirtyMatch) {\n        // Immediately trigger searching for non-'find' operations, when the\n        // current state needs to be reset and matches re-calculated.\n        this._nextMatch();\n      } else if (cmd === \"findagain\") {\n        this._nextMatch();\n\n        // When the findbar was previously closed, and `highlightAll` is set,\n        // ensure that the matches on all active pages are highlighted again.\n        if (findbarClosed && this._state.highlightAll) {\n          this._updateAllPages();\n        }\n      } else if (cmd === \"findhighlightallchange\") {\n        // If there was a pending search operation, synchronously trigger a new\n        // search *first* to ensure that the correct matches are highlighted.\n        if (pendingTimeout) {\n          this._nextMatch();\n        } else {\n          this._highlightMatches = true;\n        }\n        this._updateAllPages(); // Update the highlighting on all active pages.\n      } else {\n        this._nextMatch();\n      }\n    });\n  }\n\n  scrollMatchIntoView({ element = null, pageIndex = -1, matchIndex = -1 }) {\n    if (!this._scrollMatches || !element) {\n      return;\n    } else if (matchIndex === -1 || matchIndex !== this._selected.matchIdx) {\n      return;\n    } else if (pageIndex === -1 || pageIndex !== this._selected.pageIdx) {\n      return;\n    }\n    this._scrollMatches = false; // Ensure that scrolling only happens once.\n\n    const spot = {\n      top: MATCH_SCROLL_OFFSET_TOP,\n      left: MATCH_SCROLL_OFFSET_LEFT,\n    };\n    scrollIntoView(element, spot, /* skipOverflowHiddenElements = */ true);\n  }\n\n  _reset() {\n    this._highlightMatches = false;\n    this._scrollMatches = false;\n    this._pdfDocument = null;\n    this._pageMatches = [];\n    this._pageMatchesLength = [];\n    this._state = null;\n    // Currently selected match.\n    this._selected = {\n      pageIdx: -1,\n      matchIdx: -1,\n    };\n    // Where the find algorithm currently is in the document.\n    this._offset = {\n      pageIdx: null,\n      matchIdx: null,\n      wrapped: false,\n    };\n    this._extractTextPromises = [];\n    this._pageContents = []; // Stores the normalized text for each page.\n    this._matchesCountTotal = 0;\n    this._pagesToSearch = null;\n    this._pendingFindMatches = Object.create(null);\n    this._resumePageIdx = null;\n    this._dirtyMatch = false;\n    clearTimeout(this._findTimeout);\n    this._findTimeout = null;\n\n    this._firstPageCapability = createPromiseCapability();\n  }\n\n  /**\n   * @type {string} The (current) normalized search query.\n   */\n  get _query() {\n    if (this._state.query !== this._rawQuery) {\n      this._rawQuery = this._state.query;\n      this._normalizedQuery = normalize(this._state.query);\n    }\n    return this._normalizedQuery;\n  }\n\n  _shouldDirtyMatch(cmd, state) {\n    // When the search query changes, regardless of the actual search command\n    // used, always re-calculate matches to avoid errors (fixes bug 1030622).\n    if (state.query !== this._state.query) {\n      return true;\n    }\n    switch (cmd) {\n      case \"findagain\":\n        const pageNumber = this._selected.pageIdx + 1;\n        const linkService = this._linkService;\n        // Only treat a 'findagain' event as a new search operation when it's\n        // *absolutely* certain that the currently selected match is no longer\n        // visible, e.g. as a result of the user scrolling in the document.\n        //\n        // NOTE: If only a simple `this._linkService.page` check was used here,\n        // there's a risk that consecutive 'findagain' operations could \"skip\"\n        // over matches at the top/bottom of pages thus making them completely\n        // inaccessible when there's multiple pages visible in the viewer.\n        if (\n          pageNumber >= 1 &&\n          pageNumber <= linkService.pagesCount &&\n          pageNumber !== linkService.page &&\n          !linkService.isPageVisible(pageNumber)\n        ) {\n          return true;\n        }\n        return false;\n      case \"findhighlightallchange\":\n        return false;\n    }\n    return true;\n  }\n\n  /**\n   * Helper for multi-term search that fills the `matchesWithLength` array\n   * and handles cases where one search term includes another search term (for\n   * example, \"tamed tame\" or \"this is\"). It looks for intersecting terms in\n   * the `matches` and keeps elements with a longer match length.\n   */\n  _prepareMatches(matchesWithLength, matches, matchesLength) {\n    function isSubTerm(currentIndex) {\n      const currentElem = matchesWithLength[currentIndex];\n      const nextElem = matchesWithLength[currentIndex + 1];\n\n      // Check for cases like \"TAMEd TAME\".\n      if (\n        currentIndex < matchesWithLength.length - 1 &&\n        currentElem.match === nextElem.match\n      ) {\n        currentElem.skipped = true;\n        return true;\n      }\n\n      // Check for cases like \"thIS IS\".\n      for (let i = currentIndex - 1; i >= 0; i--) {\n        const prevElem = matchesWithLength[i];\n        if (prevElem.skipped) {\n          continue;\n        }\n        if (prevElem.match + prevElem.matchLength < currentElem.match) {\n          break;\n        }\n        if (\n          prevElem.match + prevElem.matchLength >=\n          currentElem.match + currentElem.matchLength\n        ) {\n          currentElem.skipped = true;\n          return true;\n        }\n      }\n      return false;\n    }\n\n    // Sort the array of `{ match: <match>, matchLength: <matchLength> }`\n    // objects on increasing index first and on the length otherwise.\n    matchesWithLength.sort(function (a, b) {\n      return a.match === b.match\n        ? a.matchLength - b.matchLength\n        : a.match - b.match;\n    });\n    for (let i = 0, len = matchesWithLength.length; i < len; i++) {\n      if (isSubTerm(i)) {\n        continue;\n      }\n      matches.push(matchesWithLength[i].match);\n      matchesLength.push(matchesWithLength[i].matchLength);\n    }\n  }\n\n  /**\n   * Determine if the search query constitutes a \"whole word\", by comparing the\n   * first/last character type with the preceding/following character type.\n   */\n  _isEntireWord(content, startIdx, length) {\n    if (startIdx > 0) {\n      const first = content.charCodeAt(startIdx);\n      const limit = content.charCodeAt(startIdx - 1);\n      if (getCharacterType(first) === getCharacterType(limit)) {\n        return false;\n      }\n    }\n    const endIdx = startIdx + length - 1;\n    if (endIdx < content.length - 1) {\n      const last = content.charCodeAt(endIdx);\n      const limit = content.charCodeAt(endIdx + 1);\n      if (getCharacterType(last) === getCharacterType(limit)) {\n        return false;\n      }\n    }\n    return true;\n  }\n\n  _calculatePhraseMatch(query, pageIndex, pageContent, entireWord) {\n    const matches = [];\n    const queryLen = query.length;\n\n    let matchIdx = -queryLen;\n    while (true) {\n      matchIdx = pageContent.indexOf(query, matchIdx + queryLen);\n      if (matchIdx === -1) {\n        break;\n      }\n      if (entireWord && !this._isEntireWord(pageContent, matchIdx, queryLen)) {\n        continue;\n      }\n      matches.push(matchIdx);\n    }\n    this._pageMatches[pageIndex] = matches;\n  }\n\n  _calculateWordMatch(query, pageIndex, pageContent, entireWord) {\n    const matchesWithLength = [];\n\n    // Divide the query into pieces and search for text in each piece.\n    const queryArray = query.match(/\\S+/g);\n    for (let i = 0, len = queryArray.length; i < len; i++) {\n      const subquery = queryArray[i];\n      const subqueryLen = subquery.length;\n\n      let matchIdx = -subqueryLen;\n      while (true) {\n        matchIdx = pageContent.indexOf(subquery, matchIdx + subqueryLen);\n        if (matchIdx === -1) {\n          break;\n        }\n        if (\n          entireWord &&\n          !this._isEntireWord(pageContent, matchIdx, subqueryLen)\n        ) {\n          continue;\n        }\n        // Other searches do not, so we store the length.\n        matchesWithLength.push({\n          match: matchIdx,\n          matchLength: subqueryLen,\n          skipped: false,\n        });\n      }\n    }\n\n    // Prepare arrays for storing the matches.\n    this._pageMatchesLength[pageIndex] = [];\n    this._pageMatches[pageIndex] = [];\n\n    // Sort `matchesWithLength`, remove intersecting terms and put the result\n    // into the two arrays.\n    this._prepareMatches(\n      matchesWithLength,\n      this._pageMatches[pageIndex],\n      this._pageMatchesLength[pageIndex]\n    );\n  }\n\n  _calculateMatch(pageIndex) {\n    let pageContent = this._pageContents[pageIndex];\n    let query = this._query;\n    const { caseSensitive, entireWord, phraseSearch } = this._state;\n\n    if (query.length === 0) {\n      // Do nothing: the matches should be wiped out already.\n      return;\n    }\n\n    if (!caseSensitive) {\n      pageContent = pageContent.toLowerCase();\n      query = query.toLowerCase();\n    }\n\n    if (phraseSearch) {\n      this._calculatePhraseMatch(query, pageIndex, pageContent, entireWord);\n    } else {\n      this._calculateWordMatch(query, pageIndex, pageContent, entireWord);\n    }\n\n    // When `highlightAll` is set, ensure that the matches on previously\n    // rendered (and still active) pages are correctly highlighted.\n    if (this._state.highlightAll) {\n      this._updatePage(pageIndex);\n    }\n    if (this._resumePageIdx === pageIndex) {\n      this._resumePageIdx = null;\n      this._nextPageMatch();\n    }\n\n    // Update the match count.\n    const pageMatchesCount = this._pageMatches[pageIndex].length;\n    if (pageMatchesCount > 0) {\n      this._matchesCountTotal += pageMatchesCount;\n      this._updateUIResultsCount();\n    }\n  }\n\n  _extractText() {\n    // Perform text extraction once if this method is called multiple times.\n    if (this._extractTextPromises.length > 0) {\n      return;\n    }\n\n    let promise = Promise.resolve();\n    for (let i = 0, ii = this._linkService.pagesCount; i < ii; i++) {\n      const extractTextCapability = createPromiseCapability();\n      this._extractTextPromises[i] = extractTextCapability.promise;\n\n      promise = promise.then(() => {\n        return this._pdfDocument\n          .getPage(i + 1)\n          .then(pdfPage => {\n            return pdfPage.getTextContent({\n              normalizeWhitespace: true,\n            });\n          })\n          .then(\n            textContent => {\n              const textItems = textContent.items;\n              const strBuf = [];\n\n              for (let j = 0, jj = textItems.length; j < jj; j++) {\n                strBuf.push(textItems[j].str);\n              }\n\n              // Store the normalized page content (text items) as one string.\n              this._pageContents[i] = normalize(strBuf.join(\"\"));\n              extractTextCapability.resolve(i);\n            },\n            reason => {\n              console.error(\n                `Unable to get text content for page ${i + 1}`,\n                reason\n              );\n              // Page error -- assuming no text content.\n              this._pageContents[i] = \"\";\n              extractTextCapability.resolve(i);\n            }\n          );\n      });\n    }\n  }\n\n  _updatePage(index) {\n    if (this._scrollMatches && this._selected.pageIdx === index) {\n      // If the page is selected, scroll the page into view, which triggers\n      // rendering the page, which adds the text layer. Once the text layer\n      // is built, it will attempt to scroll the selected match into view.\n      this._linkService.page = index + 1;\n    }\n\n    this._eventBus.dispatch(\"updatetextlayermatches\", {\n      source: this,\n      pageIndex: index,\n    });\n  }\n\n  _updateAllPages() {\n    this._eventBus.dispatch(\"updatetextlayermatches\", {\n      source: this,\n      pageIndex: -1,\n    });\n  }\n\n  _nextMatch() {\n    const previous = this._state.findPrevious;\n    const currentPageIndex = this._linkService.page - 1;\n    const numPages = this._linkService.pagesCount;\n\n    this._highlightMatches = true;\n\n    if (this._dirtyMatch) {\n      // Need to recalculate the matches, reset everything.\n      this._dirtyMatch = false;\n      this._selected.pageIdx = this._selected.matchIdx = -1;\n      this._offset.pageIdx = currentPageIndex;\n      this._offset.matchIdx = null;\n      this._offset.wrapped = false;\n      this._resumePageIdx = null;\n      this._pageMatches.length = 0;\n      this._pageMatchesLength.length = 0;\n      this._matchesCountTotal = 0;\n\n      this._updateAllPages(); // Wipe out any previously highlighted matches.\n\n      for (let i = 0; i < numPages; i++) {\n        // Start finding the matches as soon as the text is extracted.\n        if (this._pendingFindMatches[i] === true) {\n          continue;\n        }\n        this._pendingFindMatches[i] = true;\n        this._extractTextPromises[i].then(pageIdx => {\n          delete this._pendingFindMatches[pageIdx];\n          this._calculateMatch(pageIdx);\n        });\n      }\n    }\n\n    // If there's no query there's no point in searching.\n    if (this._query === \"\") {\n      this._updateUIState(FindState.FOUND);\n      return;\n    }\n    // If we're waiting on a page, we return since we can't do anything else.\n    if (this._resumePageIdx) {\n      return;\n    }\n\n    const offset = this._offset;\n    // Keep track of how many pages we should maximally iterate through.\n    this._pagesToSearch = numPages;\n    // If there's already a `matchIdx` that means we are iterating through a\n    // page's matches.\n    if (offset.matchIdx !== null) {\n      const numPageMatches = this._pageMatches[offset.pageIdx].length;\n      if (\n        (!previous && offset.matchIdx + 1 < numPageMatches) ||\n        (previous && offset.matchIdx > 0)\n      ) {\n        // The simple case; we just have advance the matchIdx to select\n        // the next match on the page.\n        offset.matchIdx = previous ? offset.matchIdx - 1 : offset.matchIdx + 1;\n        this._updateMatch(/* found = */ true);\n        return;\n      }\n      // We went beyond the current page's matches, so we advance to\n      // the next page.\n      this._advanceOffsetPage(previous);\n    }\n    // Start searching through the page.\n    this._nextPageMatch();\n  }\n\n  _matchesReady(matches) {\n    const offset = this._offset;\n    const numMatches = matches.length;\n    const previous = this._state.findPrevious;\n\n    if (numMatches) {\n      // There were matches for the page, so initialize `matchIdx`.\n      offset.matchIdx = previous ? numMatches - 1 : 0;\n      this._updateMatch(/* found = */ true);\n      return true;\n    }\n    // No matches, so attempt to search the next page.\n    this._advanceOffsetPage(previous);\n    if (offset.wrapped) {\n      offset.matchIdx = null;\n      if (this._pagesToSearch < 0) {\n        // No point in wrapping again, there were no matches.\n        this._updateMatch(/* found = */ false);\n        // While matches were not found, searching for a page\n        // with matches should nevertheless halt.\n        return true;\n      }\n    }\n    // Matches were not found (and searching is not done).\n    return false;\n  }\n\n  _nextPageMatch() {\n    if (this._resumePageIdx !== null) {\n      console.error(\"There can only be one pending page.\");\n    }\n\n    let matches = null;\n    do {\n      const pageIdx = this._offset.pageIdx;\n      matches = this._pageMatches[pageIdx];\n      if (!matches) {\n        // The matches don't exist yet for processing by `_matchesReady`,\n        // so set a resume point for when they do exist.\n        this._resumePageIdx = pageIdx;\n        break;\n      }\n    } while (!this._matchesReady(matches));\n  }\n\n  _advanceOffsetPage(previous) {\n    const offset = this._offset;\n    const numPages = this._linkService.pagesCount;\n    offset.pageIdx = previous ? offset.pageIdx - 1 : offset.pageIdx + 1;\n    offset.matchIdx = null;\n\n    this._pagesToSearch--;\n\n    if (offset.pageIdx >= numPages || offset.pageIdx < 0) {\n      offset.pageIdx = previous ? numPages - 1 : 0;\n      offset.wrapped = true;\n    }\n  }\n\n  _updateMatch(found = false) {\n    let state = FindState.NOT_FOUND;\n    const wrapped = this._offset.wrapped;\n    this._offset.wrapped = false;\n\n    if (found) {\n      const previousPage = this._selected.pageIdx;\n      this._selected.pageIdx = this._offset.pageIdx;\n      this._selected.matchIdx = this._offset.matchIdx;\n      state = wrapped ? FindState.WRAPPED : FindState.FOUND;\n\n      // Update the currently selected page to wipe out any selected matches.\n      if (previousPage !== -1 && previousPage !== this._selected.pageIdx) {\n        this._updatePage(previousPage);\n      }\n    }\n\n    this._updateUIState(state, this._state.findPrevious);\n    if (this._selected.pageIdx !== -1) {\n      // Ensure that the match will be scrolled into view.\n      this._scrollMatches = true;\n\n      this._updatePage(this._selected.pageIdx);\n    }\n  }\n\n  _onFindBarClose(evt) {\n    const pdfDocument = this._pdfDocument;\n    // Since searching is asynchronous, ensure that the removal of highlighted\n    // matches (from the UI) is async too such that the 'updatetextlayermatches'\n    // events will always be dispatched in the expected order.\n    this._firstPageCapability.promise.then(() => {\n      // Only update the UI if the document is open, and is the current one.\n      if (\n        !this._pdfDocument ||\n        (pdfDocument && this._pdfDocument !== pdfDocument)\n      ) {\n        return;\n      }\n      // Ensure that a pending, not yet started, search operation is aborted.\n      if (this._findTimeout) {\n        clearTimeout(this._findTimeout);\n        this._findTimeout = null;\n      }\n      // Abort any long running searches, to avoid a match being scrolled into\n      // view *after* the findbar has been closed. In this case `this._offset`\n      // will most likely differ from `this._selected`, hence we also ensure\n      // that any new search operation will always start with a clean slate.\n      if (this._resumePageIdx) {\n        this._resumePageIdx = null;\n        this._dirtyMatch = true;\n      }\n      // Avoid the UI being in a pending state when the findbar is re-opened.\n      this._updateUIState(FindState.FOUND);\n\n      this._highlightMatches = false;\n      this._updateAllPages(); // Wipe out any previously highlighted matches.\n    });\n  }\n\n  _requestMatchesCount() {\n    const { pageIdx, matchIdx } = this._selected;\n    let current = 0,\n      total = this._matchesCountTotal;\n    if (matchIdx !== -1) {\n      for (let i = 0; i < pageIdx; i++) {\n        current += (this._pageMatches[i] && this._pageMatches[i].length) || 0;\n      }\n      current += matchIdx + 1;\n    }\n    // When searching starts, this method may be called before the `pageMatches`\n    // have been counted (in `_calculateMatch`). Ensure that the UI won't show\n    // temporarily broken state when the active find result doesn't make sense.\n    if (current < 1 || current > total) {\n      current = total = 0;\n    }\n    return { current, total };\n  }\n\n  _updateUIResultsCount() {\n    this._eventBus.dispatch(\"updatefindmatchescount\", {\n      source: this,\n      matchesCount: this._requestMatchesCount(),\n    });\n  }\n\n  _updateUIState(state, previous) {\n    this._eventBus.dispatch(\"updatefindcontrolstate\", {\n      source: this,\n      state,\n      previous,\n      matchesCount: this._requestMatchesCount(),\n    });\n  }\n}\n\nexport { FindState, PDFFindController };\n","/* Copyright 2018 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nconst CharacterType = {\n  SPACE: 0,\n  ALPHA_LETTER: 1,\n  PUNCT: 2,\n  HAN_LETTER: 3,\n  KATAKANA_LETTER: 4,\n  HIRAGANA_LETTER: 5,\n  HALFWIDTH_KATAKANA_LETTER: 6,\n  THAI_LETTER: 7,\n};\n\nfunction isAlphabeticalScript(charCode) {\n  return charCode < 0x2e80;\n}\n\nfunction isAscii(charCode) {\n  return (charCode & 0xff80) === 0;\n}\n\nfunction isAsciiAlpha(charCode) {\n  return (\n    (charCode >= /* a = */ 0x61 && charCode <= /* z = */ 0x7a) ||\n    (charCode >= /* A = */ 0x41 && charCode <= /* Z = */ 0x5a)\n  );\n}\n\nfunction isAsciiDigit(charCode) {\n  return charCode >= /* 0 = */ 0x30 && charCode <= /* 9 = */ 0x39;\n}\n\nfunction isAsciiSpace(charCode) {\n  return (\n    charCode === /* SPACE = */ 0x20 ||\n    charCode === /* TAB = */ 0x09 ||\n    charCode === /* CR = */ 0x0d ||\n    charCode === /* LF = */ 0x0a\n  );\n}\n\nfunction isHan(charCode) {\n  return (\n    (charCode >= 0x3400 && charCode <= 0x9fff) ||\n    (charCode >= 0xf900 && charCode <= 0xfaff)\n  );\n}\n\nfunction isKatakana(charCode) {\n  return charCode >= 0x30a0 && charCode <= 0x30ff;\n}\n\nfunction isHiragana(charCode) {\n  return charCode >= 0x3040 && charCode <= 0x309f;\n}\n\nfunction isHalfwidthKatakana(charCode) {\n  return charCode >= 0xff60 && charCode <= 0xff9f;\n}\n\nfunction isThai(charCode) {\n  return (charCode & 0xff80) === 0x0e00;\n}\n\n/**\n * This function is based on the word-break detection implemented in:\n * https://hg.mozilla.org/mozilla-central/file/tip/intl/lwbrk/WordBreaker.cpp\n */\nfunction getCharacterType(charCode) {\n  if (isAlphabeticalScript(charCode)) {\n    if (isAscii(charCode)) {\n      if (isAsciiSpace(charCode)) {\n        return CharacterType.SPACE;\n      } else if (\n        isAsciiAlpha(charCode) ||\n        isAsciiDigit(charCode) ||\n        charCode === /* UNDERSCORE = */ 0x5f\n      ) {\n        return CharacterType.ALPHA_LETTER;\n      }\n      return CharacterType.PUNCT;\n    } else if (isThai(charCode)) {\n      return CharacterType.THAI_LETTER;\n    } else if (charCode === /* NBSP = */ 0xa0) {\n      return CharacterType.SPACE;\n    }\n    return CharacterType.ALPHA_LETTER;\n  }\n\n  if (isHan(charCode)) {\n    return CharacterType.HAN_LETTER;\n  } else if (isKatakana(charCode)) {\n    return CharacterType.KATAKANA_LETTER;\n  } else if (isHiragana(charCode)) {\n    return CharacterType.HIRAGANA_LETTER;\n  } else if (isHalfwidthKatakana(charCode)) {\n    return CharacterType.HALFWIDTH_KATAKANA_LETTER;\n  }\n  return CharacterType.ALPHA_LETTER;\n}\n\nexport { CharacterType, getCharacterType };\n","/* Copyright 2017 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport {\n  isValidRotation,\n  parseQueryString,\n  waitOnEventOrTimeout,\n} from \"./ui_utils.js\";\n\n// Heuristic value used when force-resetting `this._blockHashChange`.\nconst HASH_CHANGE_TIMEOUT = 1000; // milliseconds\n// Heuristic value used when adding the current position to the browser history.\nconst POSITION_UPDATED_THRESHOLD = 50;\n// Heuristic value used when adding a temporary position to the browser history.\nconst UPDATE_VIEWAREA_TIMEOUT = 1000; // milliseconds\n\n/**\n * @typedef {Object} PDFHistoryOptions\n * @property {IPDFLinkService} linkService - The navigation/linking service.\n * @property {EventBus} eventBus - The application event bus.\n */\n\n/**\n * @typedef {Object} InitializeParameters\n * @property {string} fingerprint - The PDF document's unique fingerprint.\n * @property {boolean} [resetHistory] - Reset the browsing history.\n * @property {boolean} [updateUrl] - Attempt to update the document URL, with\n *   the current hash, when pushing/replacing browser history entries.\n */\n\n/**\n * @typedef {Object} PushParameters\n * @property {string} [namedDest] - The named destination. If absent, a\n *   stringified version of `explicitDest` is used.\n * @property {Array} explicitDest - The explicit destination array.\n * @property {number} pageNumber - The page to which the destination points.\n */\n\nfunction getCurrentHash() {\n  return document.location.hash;\n}\n\nclass PDFHistory {\n  /**\n   * @param {PDFHistoryOptions} options\n   */\n  constructor({ linkService, eventBus }) {\n    this.linkService = linkService;\n    this.eventBus = eventBus;\n\n    this._initialized = false;\n    this._fingerprint = \"\";\n    this.reset();\n\n    this._boundEvents = null;\n    this._isViewerInPresentationMode = false;\n    // Ensure that we don't miss either a 'presentationmodechanged' or a\n    // 'pagesinit' event, by registering the listeners immediately.\n    this.eventBus._on(\"presentationmodechanged\", evt => {\n      this._isViewerInPresentationMode = evt.active || evt.switchInProgress;\n    });\n    this.eventBus._on(\"pagesinit\", () => {\n      this._isPagesLoaded = false;\n\n      const onPagesLoaded = evt => {\n        this.eventBus._off(\"pagesloaded\", onPagesLoaded);\n        this._isPagesLoaded = !!evt.pagesCount;\n      };\n      this.eventBus._on(\"pagesloaded\", onPagesLoaded);\n    });\n  }\n\n  /**\n   * Initialize the history for the PDF document, using either the current\n   * browser history entry or the document hash, whichever is present.\n   * @param {InitializeParameters} params\n   */\n  initialize({ fingerprint, resetHistory = false, updateUrl = false }) {\n    if (!fingerprint || typeof fingerprint !== \"string\") {\n      console.error(\n        'PDFHistory.initialize: The \"fingerprint\" must be a non-empty string.'\n      );\n      return;\n    }\n    // Ensure that any old state is always reset upon initialization.\n    if (this._initialized) {\n      this.reset();\n    }\n    const reInitialized =\n      this._fingerprint !== \"\" && this._fingerprint !== fingerprint;\n    this._fingerprint = fingerprint;\n    this._updateUrl = updateUrl === true;\n\n    this._initialized = true;\n    this._bindEvents();\n    const state = window.history.state;\n\n    this._popStateInProgress = false;\n    this._blockHashChange = 0;\n    this._currentHash = getCurrentHash();\n    this._numPositionUpdates = 0;\n\n    this._uid = this._maxUid = 0;\n    this._destination = null;\n    this._position = null;\n\n    if (!this._isValidState(state, /* checkReload = */ true) || resetHistory) {\n      const { hash, page, rotation } = this._parseCurrentHash(\n        /* checkNameddest = */ true\n      );\n\n      if (!hash || reInitialized || resetHistory) {\n        // Ensure that the browser history is reset on PDF document load.\n        this._pushOrReplaceState(null, /* forceReplace = */ true);\n        return;\n      }\n      // Ensure that the browser history is initialized correctly when\n      // the document hash is present on PDF document load.\n      this._pushOrReplaceState(\n        { hash, page, rotation },\n        /* forceReplace = */ true\n      );\n      return;\n    }\n\n    // The browser history contains a valid entry, ensure that the history is\n    // initialized correctly on PDF document load.\n    const destination = state.destination;\n    this._updateInternalState(\n      destination,\n      state.uid,\n      /* removeTemporary = */ true\n    );\n    if (this._uid > this._maxUid) {\n      this._maxUid = this._uid;\n    }\n\n    if (destination.rotation !== undefined) {\n      this._initialRotation = destination.rotation;\n    }\n    if (destination.dest) {\n      this._initialBookmark = JSON.stringify(destination.dest);\n\n      // If the history is updated, e.g. through the user changing the hash,\n      // before the initial destination has become visible, then we do *not*\n      // want to potentially add `this._position` to the browser history.\n      this._destination.page = null;\n    } else if (destination.hash) {\n      this._initialBookmark = destination.hash;\n    } else if (destination.page) {\n      // Fallback case; shouldn't be necessary, but better safe than sorry.\n      this._initialBookmark = `page=${destination.page}`;\n    }\n  }\n\n  /**\n   * Reset the current `PDFHistory` instance, and consequently prevent any\n   * further updates and/or navigation of the browser history.\n   */\n  reset() {\n    if (this._initialized) {\n      this._pageHide(); // Simulate a 'pagehide' event when resetting.\n\n      this._initialized = false;\n      this._unbindEvents();\n    }\n    if (this._updateViewareaTimeout) {\n      clearTimeout(this._updateViewareaTimeout);\n      this._updateViewareaTimeout = null;\n    }\n    this._initialBookmark = null;\n    this._initialRotation = null;\n  }\n\n  /**\n   * Push an internal destination to the browser history.\n   * @param {PushParameters}\n   */\n  push({ namedDest = null, explicitDest, pageNumber }) {\n    if (!this._initialized) {\n      return;\n    }\n    if (namedDest && typeof namedDest !== \"string\") {\n      console.error(\n        \"PDFHistory.push: \" +\n          `\"${namedDest}\" is not a valid namedDest parameter.`\n      );\n      return;\n    } else if (!Array.isArray(explicitDest)) {\n      console.error(\n        \"PDFHistory.push: \" +\n          `\"${explicitDest}\" is not a valid explicitDest parameter.`\n      );\n      return;\n    } else if (\n      !(\n        Number.isInteger(pageNumber) &&\n        pageNumber > 0 &&\n        pageNumber <= this.linkService.pagesCount\n      )\n    ) {\n      // Allow an unset `pageNumber` if and only if the history is still empty;\n      // please refer to the `this._destination.page = null;` comment above.\n      if (pageNumber !== null || this._destination) {\n        console.error(\n          \"PDFHistory.push: \" +\n            `\"${pageNumber}\" is not a valid pageNumber parameter.`\n        );\n        return;\n      }\n    }\n\n    const hash = namedDest || JSON.stringify(explicitDest);\n    if (!hash) {\n      // The hash *should* never be undefined, but if that were to occur,\n      // avoid any possible issues by not updating the browser history.\n      return;\n    }\n\n    let forceReplace = false;\n    if (\n      this._destination &&\n      (isDestHashesEqual(this._destination.hash, hash) ||\n        isDestArraysEqual(this._destination.dest, explicitDest))\n    ) {\n      // When the new destination is identical to `this._destination`, and\n      // its `page` is undefined, replace the current browser history entry.\n      // NOTE: This can only occur if `this._destination` was set either:\n      //  - through the document hash being specified on load.\n      //  - through the user changing the hash of the document.\n      if (this._destination.page) {\n        return;\n      }\n      forceReplace = true;\n    }\n    if (this._popStateInProgress && !forceReplace) {\n      return;\n    }\n\n    this._pushOrReplaceState(\n      {\n        dest: explicitDest,\n        hash,\n        page: pageNumber,\n        rotation: this.linkService.rotation,\n      },\n      forceReplace\n    );\n\n    if (!this._popStateInProgress) {\n      // Prevent the browser history from updating while the new destination is\n      // being scrolled into view, to avoid potentially inconsistent state.\n      this._popStateInProgress = true;\n      // We defer the resetting of `this._popStateInProgress`, to account for\n      // e.g. zooming occuring when the new destination is being navigated to.\n      Promise.resolve().then(() => {\n        this._popStateInProgress = false;\n      });\n    }\n  }\n\n  /**\n   * Push the current position to the browser history.\n   */\n  pushCurrentPosition() {\n    if (!this._initialized || this._popStateInProgress) {\n      return;\n    }\n    this._tryPushCurrentPosition();\n  }\n\n  /**\n   * Go back one step in the browser history.\n   * NOTE: Avoids navigating away from the document, useful for \"named actions\".\n   */\n  back() {\n    if (!this._initialized || this._popStateInProgress) {\n      return;\n    }\n    const state = window.history.state;\n    if (this._isValidState(state) && state.uid > 0) {\n      window.history.back();\n    }\n  }\n\n  /**\n   * Go forward one step in the browser history.\n   * NOTE: Avoids navigating away from the document, useful for \"named actions\".\n   */\n  forward() {\n    if (!this._initialized || this._popStateInProgress) {\n      return;\n    }\n    const state = window.history.state;\n    if (this._isValidState(state) && state.uid < this._maxUid) {\n      window.history.forward();\n    }\n  }\n\n  /**\n   * @type {boolean} Indicating if the user is currently moving through the\n   *   browser history, useful e.g. for skipping the next 'hashchange' event.\n   */\n  get popStateInProgress() {\n    return (\n      this._initialized &&\n      (this._popStateInProgress || this._blockHashChange > 0)\n    );\n  }\n\n  get initialBookmark() {\n    return this._initialized ? this._initialBookmark : null;\n  }\n\n  get initialRotation() {\n    return this._initialized ? this._initialRotation : null;\n  }\n\n  /**\n   * @private\n   */\n  _pushOrReplaceState(destination, forceReplace = false) {\n    const shouldReplace = forceReplace || !this._destination;\n    const newState = {\n      fingerprint: this._fingerprint,\n      uid: shouldReplace ? this._uid : this._uid + 1,\n      destination,\n    };\n\n    if (\n      typeof PDFJSDev !== \"undefined\" &&\n      PDFJSDev.test(\"CHROME\") &&\n      window.history.state &&\n      window.history.state.chromecomState\n    ) {\n      // history.state.chromecomState is managed by chromecom.js.\n      newState.chromecomState = window.history.state.chromecomState;\n    }\n    this._updateInternalState(destination, newState.uid);\n\n    let newUrl;\n    if (this._updateUrl && destination && destination.hash) {\n      const baseUrl = document.location.href.split(\"#\")[0];\n      // Prevent errors in Firefox.\n      if (!baseUrl.startsWith(\"file://\")) {\n        newUrl = `${baseUrl}#${destination.hash}`;\n      }\n    }\n    if (shouldReplace) {\n      window.history.replaceState(newState, \"\", newUrl);\n    } else {\n      this._maxUid = this._uid;\n      window.history.pushState(newState, \"\", newUrl);\n    }\n\n    if (\n      typeof PDFJSDev !== \"undefined\" &&\n      PDFJSDev.test(\"CHROME\") &&\n      top === window\n    ) {\n      // eslint-disable-next-line no-undef\n      chrome.runtime.sendMessage(\"showPageAction\");\n    }\n  }\n\n  /**\n   * @private\n   */\n  _tryPushCurrentPosition(temporary = false) {\n    if (!this._position) {\n      return;\n    }\n    let position = this._position;\n    if (temporary) {\n      position = Object.assign(Object.create(null), this._position);\n      position.temporary = true;\n    }\n\n    if (!this._destination) {\n      this._pushOrReplaceState(position);\n      return;\n    }\n    if (this._destination.temporary) {\n      // Always replace a previous *temporary* position.\n      this._pushOrReplaceState(position, /* forceReplace = */ true);\n      return;\n    }\n    if (this._destination.hash === position.hash) {\n      return; // The current document position has not changed.\n    }\n    if (\n      !this._destination.page &&\n      (POSITION_UPDATED_THRESHOLD <= 0 ||\n        this._numPositionUpdates <= POSITION_UPDATED_THRESHOLD)\n    ) {\n      // `this._destination` was set through the user changing the hash of\n      // the document. Do not add `this._position` to the browser history,\n      // to avoid \"flooding\" it with lots of (nearly) identical entries,\n      // since we cannot ensure that the document position has changed.\n      return;\n    }\n\n    let forceReplace = false;\n    if (\n      this._destination.page >= position.first &&\n      this._destination.page <= position.page\n    ) {\n      // When the `page` of `this._destination` is still visible, do not\n      // update the browsing history when `this._destination` either:\n      //  - contains an internal destination, since in this case we\n      //    cannot ensure that the document position has actually changed.\n      //  - was set through the user changing the hash of the document.\n      if (this._destination.dest || !this._destination.first) {\n        return;\n      }\n      // To avoid \"flooding\" the browser history, replace the current entry.\n      forceReplace = true;\n    }\n    this._pushOrReplaceState(position, forceReplace);\n  }\n\n  /**\n   * @private\n   */\n  _isValidState(state, checkReload = false) {\n    if (!state) {\n      return false;\n    }\n    if (state.fingerprint !== this._fingerprint) {\n      if (checkReload) {\n        // Potentially accept the history entry, even if the fingerprints don't\n        // match, when the viewer was reloaded (see issue 6847).\n        if (\n          typeof state.fingerprint !== \"string\" ||\n          state.fingerprint.length !== this._fingerprint.length\n        ) {\n          return false;\n        }\n        const [perfEntry] = performance.getEntriesByType(\"navigation\");\n        if (!perfEntry || perfEntry.type !== \"reload\") {\n          return false;\n        }\n      } else {\n        // This should only occur in viewers with support for opening more than\n        // one PDF document, e.g. the GENERIC viewer.\n        return false;\n      }\n    }\n    if (!Number.isInteger(state.uid) || state.uid < 0) {\n      return false;\n    }\n    if (state.destination === null || typeof state.destination !== \"object\") {\n      return false;\n    }\n    return true;\n  }\n\n  /**\n   * @private\n   */\n  _updateInternalState(destination, uid, removeTemporary = false) {\n    if (this._updateViewareaTimeout) {\n      // When updating `this._destination`, make sure that we always wait for\n      // the next 'updateviewarea' event before (potentially) attempting to\n      // push the current position to the browser history.\n      clearTimeout(this._updateViewareaTimeout);\n      this._updateViewareaTimeout = null;\n    }\n    if (removeTemporary && destination && destination.temporary) {\n      // When the `destination` comes from the browser history,\n      // we no longer treat it as a *temporary* position.\n      delete destination.temporary;\n    }\n    this._destination = destination;\n    this._uid = uid;\n    // This should always be reset when `this._destination` is updated.\n    this._numPositionUpdates = 0;\n  }\n\n  /**\n   * @private\n   */\n  _parseCurrentHash(checkNameddest = false) {\n    const hash = unescape(getCurrentHash()).substring(1);\n    const params = parseQueryString(hash);\n\n    const nameddest = params.nameddest || \"\";\n    let page = params.page | 0;\n\n    if (\n      !(\n        Number.isInteger(page) &&\n        page > 0 &&\n        page <= this.linkService.pagesCount\n      ) ||\n      (checkNameddest && nameddest.length > 0)\n    ) {\n      page = null;\n    }\n    return { hash, page, rotation: this.linkService.rotation };\n  }\n\n  /**\n   * @private\n   */\n  _updateViewarea({ location }) {\n    if (this._updateViewareaTimeout) {\n      clearTimeout(this._updateViewareaTimeout);\n      this._updateViewareaTimeout = null;\n    }\n\n    this._position = {\n      hash: this._isViewerInPresentationMode\n        ? `page=${location.pageNumber}`\n        : location.pdfOpenParams.substring(1),\n      page: this.linkService.page,\n      first: location.pageNumber,\n      rotation: location.rotation,\n    };\n\n    if (this._popStateInProgress) {\n      return;\n    }\n\n    if (\n      POSITION_UPDATED_THRESHOLD > 0 &&\n      this._isPagesLoaded &&\n      this._destination &&\n      !this._destination.page\n    ) {\n      // If the current destination was set through the user changing the hash\n      // of the document, we will usually not try to push the current position\n      // to the browser history; see `this._tryPushCurrentPosition()`.\n      //\n      // To prevent `this._tryPushCurrentPosition()` from effectively being\n      // reduced to a no-op in this case, we will assume that the position\n      // *did* in fact change if the 'updateviewarea' event was dispatched\n      // more than `POSITION_UPDATED_THRESHOLD` times.\n      this._numPositionUpdates++;\n    }\n\n    if (UPDATE_VIEWAREA_TIMEOUT > 0) {\n      // When closing the browser, a 'pagehide' event will be dispatched which\n      // *should* allow us to push the current position to the browser history.\n      // In practice, it seems that the event is arriving too late in order for\n      // the session history to be successfully updated.\n      // (For additional details, please refer to the discussion in\n      //  https://bugzilla.mozilla.org/show_bug.cgi?id=1153393.)\n      //\n      // To workaround this we attempt to *temporarily* add the current position\n      // to the browser history only when the viewer is *idle*,\n      // i.e. when scrolling and/or zooming does not occur.\n      //\n      // PLEASE NOTE: It's absolutely imperative that the browser history is\n      // *not* updated too often, since that would render the viewer more or\n      // less unusable. Hence the use of a timeout to delay the update until\n      // the viewer has been idle for `UPDATE_VIEWAREA_TIMEOUT` milliseconds.\n      this._updateViewareaTimeout = setTimeout(() => {\n        if (!this._popStateInProgress) {\n          this._tryPushCurrentPosition(/* temporary = */ true);\n        }\n        this._updateViewareaTimeout = null;\n      }, UPDATE_VIEWAREA_TIMEOUT);\n    }\n  }\n\n  /**\n   * @private\n   */\n  _popState({ state }) {\n    const newHash = getCurrentHash(),\n      hashChanged = this._currentHash !== newHash;\n    this._currentHash = newHash;\n\n    if (\n      (typeof PDFJSDev !== \"undefined\" &&\n        PDFJSDev.test(\"CHROME\") &&\n        state &&\n        state.chromecomState &&\n        !this._isValidState(state)) ||\n      !state\n    ) {\n      // This case corresponds to the user changing the hash of the document.\n      this._uid++;\n\n      const { hash, page, rotation } = this._parseCurrentHash();\n      this._pushOrReplaceState(\n        { hash, page, rotation },\n        /* forceReplace = */ true\n      );\n      return;\n    }\n    if (!this._isValidState(state)) {\n      // This should only occur in viewers with support for opening more than\n      // one PDF document, e.g. the GENERIC viewer.\n      return;\n    }\n\n    // Prevent the browser history from updating until the new destination,\n    // as stored in the browser history, has been scrolled into view.\n    this._popStateInProgress = true;\n\n    if (hashChanged) {\n      // When the hash changed, implying that the 'popstate' event will be\n      // followed by a 'hashchange' event, then we do *not* want to update the\n      // browser history when handling the 'hashchange' event (in web/app.js)\n      // since that would *overwrite* the new destination navigated to below.\n      //\n      // To avoid accidentally disabling all future user-initiated hash changes,\n      // if there's e.g. another 'hashchange' listener that stops the event\n      // propagation, we make sure to always force-reset `this._blockHashChange`\n      // after `HASH_CHANGE_TIMEOUT` milliseconds have passed.\n      this._blockHashChange++;\n      waitOnEventOrTimeout({\n        target: window,\n        name: \"hashchange\",\n        delay: HASH_CHANGE_TIMEOUT,\n      }).then(() => {\n        this._blockHashChange--;\n      });\n    }\n\n    // Navigate to the new destination.\n    const destination = state.destination;\n    this._updateInternalState(\n      destination,\n      state.uid,\n      /* removeTemporary = */ true\n    );\n    if (this._uid > this._maxUid) {\n      this._maxUid = this._uid;\n    }\n\n    if (isValidRotation(destination.rotation)) {\n      this.linkService.rotation = destination.rotation;\n    }\n    if (destination.dest) {\n      this.linkService.navigateTo(destination.dest);\n    } else if (destination.hash) {\n      this.linkService.setHash(destination.hash);\n    } else if (destination.page) {\n      // Fallback case; shouldn't be necessary, but better safe than sorry.\n      this.linkService.page = destination.page;\n    }\n\n    // Since `PDFLinkService.navigateTo` is asynchronous, we thus defer the\n    // resetting of `this._popStateInProgress` slightly.\n    Promise.resolve().then(() => {\n      this._popStateInProgress = false;\n    });\n  }\n\n  /**\n   * @private\n   */\n  _pageHide() {\n    // Attempt to push the `this._position` into the browser history when\n    // navigating away from the document. This is *only* done if the history\n    // is empty/temporary, since otherwise an existing browser history entry\n    // will end up being overwritten (given that new entries cannot be pushed\n    // into the browser history when the 'unload' event has already fired).\n    if (!this._destination || this._destination.temporary) {\n      this._tryPushCurrentPosition();\n    }\n  }\n\n  /**\n   * @private\n   */\n  _bindEvents() {\n    if (this._boundEvents) {\n      return; // The event listeners were already added.\n    }\n    this._boundEvents = {\n      updateViewarea: this._updateViewarea.bind(this),\n      popState: this._popState.bind(this),\n      pageHide: this._pageHide.bind(this),\n    };\n\n    this.eventBus._on(\"updateviewarea\", this._boundEvents.updateViewarea);\n    window.addEventListener(\"popstate\", this._boundEvents.popState);\n    window.addEventListener(\"pagehide\", this._boundEvents.pageHide);\n  }\n\n  /**\n   * @private\n   */\n  _unbindEvents() {\n    if (!this._boundEvents) {\n      return; // The event listeners were already removed.\n    }\n    this.eventBus._off(\"updateviewarea\", this._boundEvents.updateViewarea);\n    window.removeEventListener(\"popstate\", this._boundEvents.popState);\n    window.removeEventListener(\"pagehide\", this._boundEvents.pageHide);\n\n    this._boundEvents = null;\n  }\n}\n\nfunction isDestHashesEqual(destHash, pushHash) {\n  if (typeof destHash !== \"string\" || typeof pushHash !== \"string\") {\n    return false;\n  }\n  if (destHash === pushHash) {\n    return true;\n  }\n  const { nameddest } = parseQueryString(destHash);\n  if (nameddest === pushHash) {\n    return true;\n  }\n  return false;\n}\n\nfunction isDestArraysEqual(firstDest, secondDest) {\n  function isEntryEqual(first, second) {\n    if (typeof first !== typeof second) {\n      return false;\n    }\n    if (Array.isArray(first) || Array.isArray(second)) {\n      return false;\n    }\n    if (first !== null && typeof first === \"object\" && second !== null) {\n      if (Object.keys(first).length !== Object.keys(second).length) {\n        return false;\n      }\n      for (const key in first) {\n        if (!isEntryEqual(first[key], second[key])) {\n          return false;\n        }\n      }\n      return true;\n    }\n    return first === second || (Number.isNaN(first) && Number.isNaN(second));\n  }\n\n  if (!(Array.isArray(firstDest) && Array.isArray(secondDest))) {\n    return false;\n  }\n  if (firstDest.length !== secondDest.length) {\n    return false;\n  }\n  for (let i = 0, ii = firstDest.length; i < ii; i++) {\n    if (!isEntryEqual(firstDest[i], secondDest[i])) {\n      return false;\n    }\n  }\n  return true;\n}\n\nexport { PDFHistory, isDestHashesEqual, isDestArraysEqual };\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport {\n  approximateFraction,\n  CSS_UNITS,\n  DEFAULT_SCALE,\n  getOutputScale,\n  NullL10n,\n  RendererType,\n  roundToDivide,\n  TextLayerMode,\n} from \"./ui_utils.js\";\nimport {\n  createPromiseCapability,\n  RenderingCancelledException,\n  SVGGraphics,\n} from \"pdfjs-lib\";\nimport { RenderingStates } from \"./pdf_rendering_queue.js\";\nimport { viewerCompatibilityParams } from \"./viewer_compatibility.js\";\n\n/**\n * @typedef {Object} PDFPageViewOptions\n * @property {HTMLDivElement} container - The viewer element.\n * @property {EventBus} eventBus - The application event bus.\n * @property {number} id - The page unique ID (normally its number).\n * @property {number} scale - The page scale display.\n * @property {PageViewport} defaultViewport - The page viewport.\n * @property {PDFRenderingQueue} renderingQueue - The rendering queue object.\n * @property {IPDFTextLayerFactory} textLayerFactory\n * @property {number} [textLayerMode] - Controls if the text layer used for\n *   selection and searching is created, and if the improved text selection\n *   behaviour is enabled. The constants from {TextLayerMode} should be used.\n *   The default value is `TextLayerMode.ENABLE`.\n * @property {IPDFAnnotationLayerFactory} annotationLayerFactory\n * @property {string} [imageResourcesPath] - Path for image resources, mainly\n *   for annotation icons. Include trailing slash.\n * @property {boolean} renderInteractiveForms - Turns on rendering of\n *   interactive form elements. The default is `false`.\n * @property {string} renderer - 'canvas' or 'svg'. The default is 'canvas'.\n * @property {boolean} [enableWebGL] - Enables WebGL accelerated rendering for\n *   some operations. The default value is `false`.\n * @property {boolean} [useOnlyCssZoom] - Enables CSS only zooming. The default\n *   value is `false`.\n * @property {number} [maxCanvasPixels] - The maximum supported canvas size in\n *   total pixels, i.e. width * height. Use -1 for no limit. The default value\n *   is 4096 * 4096 (16 mega-pixels).\n * @property {IL10n} l10n - Localization service.\n */\n\nconst MAX_CANVAS_PIXELS = viewerCompatibilityParams.maxCanvasPixels || 16777216;\n\n/**\n * @implements {IRenderableView}\n */\nclass PDFPageView {\n  /**\n   * @param {PDFPageViewOptions} options\n   */\n  constructor(options) {\n    const container = options.container;\n    const defaultViewport = options.defaultViewport;\n\n    this.id = options.id;\n    this.renderingId = \"page\" + this.id;\n\n    this.pdfPage = null;\n    this.pageLabel = null;\n    this.rotation = 0;\n    this.scale = options.scale || DEFAULT_SCALE;\n    this.viewport = defaultViewport;\n    this.pdfPageRotate = defaultViewport.rotation;\n    this.hasRestrictedScaling = false;\n    this.textLayerMode = Number.isInteger(options.textLayerMode)\n      ? options.textLayerMode\n      : TextLayerMode.ENABLE;\n    this.imageResourcesPath = options.imageResourcesPath || \"\";\n    this.renderInteractiveForms = options.renderInteractiveForms || false;\n    this.useOnlyCssZoom = options.useOnlyCssZoom || false;\n    this.maxCanvasPixels = options.maxCanvasPixels || MAX_CANVAS_PIXELS;\n\n    this.eventBus = options.eventBus;\n    this.renderingQueue = options.renderingQueue;\n    this.textLayerFactory = options.textLayerFactory;\n    this.annotationLayerFactory = options.annotationLayerFactory;\n    this.renderer = options.renderer || RendererType.CANVAS;\n    this.enableWebGL = options.enableWebGL || false;\n    this.l10n = options.l10n || NullL10n;\n\n    this.paintTask = null;\n    this.paintedViewportMap = new WeakMap();\n    this.renderingState = RenderingStates.INITIAL;\n    this.resume = null;\n    this.error = null;\n\n    this.annotationLayer = null;\n    this.textLayer = null;\n    this.zoomLayer = null;\n\n    const div = document.createElement(\"div\");\n    div.className = \"page\";\n    div.style.width = Math.floor(this.viewport.width) + \"px\";\n    div.style.height = Math.floor(this.viewport.height) + \"px\";\n    div.setAttribute(\"data-page-number\", this.id);\n    this.div = div;\n\n    container.appendChild(div);\n  }\n\n  setPdfPage(pdfPage) {\n    this.pdfPage = pdfPage;\n    this.pdfPageRotate = pdfPage.rotate;\n\n    const totalRotation = (this.rotation + this.pdfPageRotate) % 360;\n    this.viewport = pdfPage.getViewport({\n      scale: this.scale * CSS_UNITS,\n      rotation: totalRotation,\n    });\n    this.stats = pdfPage.stats;\n    this.reset();\n  }\n\n  destroy() {\n    this.reset();\n    if (this.pdfPage) {\n      this.pdfPage.cleanup();\n    }\n  }\n\n  /**\n   * @private\n   */\n  _resetZoomLayer(removeFromDOM = false) {\n    if (!this.zoomLayer) {\n      return;\n    }\n    const zoomLayerCanvas = this.zoomLayer.firstChild;\n    this.paintedViewportMap.delete(zoomLayerCanvas);\n    // Zeroing the width and height causes Firefox to release graphics\n    // resources immediately, which can greatly reduce memory consumption.\n    zoomLayerCanvas.width = 0;\n    zoomLayerCanvas.height = 0;\n\n    if (removeFromDOM) {\n      // Note: `ChildNode.remove` doesn't throw if the parent node is undefined.\n      this.zoomLayer.remove();\n    }\n    this.zoomLayer = null;\n  }\n\n  reset(keepZoomLayer = false, keepAnnotations = false) {\n    this.cancelRendering(keepAnnotations);\n    this.renderingState = RenderingStates.INITIAL;\n\n    const div = this.div;\n    div.style.width = Math.floor(this.viewport.width) + \"px\";\n    div.style.height = Math.floor(this.viewport.height) + \"px\";\n\n    const childNodes = div.childNodes;\n    const currentZoomLayerNode = (keepZoomLayer && this.zoomLayer) || null;\n    const currentAnnotationNode =\n      (keepAnnotations && this.annotationLayer && this.annotationLayer.div) ||\n      null;\n    for (let i = childNodes.length - 1; i >= 0; i--) {\n      const node = childNodes[i];\n      if (currentZoomLayerNode === node || currentAnnotationNode === node) {\n        continue;\n      }\n      div.removeChild(node);\n    }\n    div.removeAttribute(\"data-loaded\");\n\n    if (currentAnnotationNode) {\n      // Hide the annotation layer until all elements are resized\n      // so they are not displayed on the already resized page.\n      this.annotationLayer.hide();\n    } else if (this.annotationLayer) {\n      this.annotationLayer.cancel();\n      this.annotationLayer = null;\n    }\n\n    if (!currentZoomLayerNode) {\n      if (this.canvas) {\n        this.paintedViewportMap.delete(this.canvas);\n        // Zeroing the width and height causes Firefox to release graphics\n        // resources immediately, which can greatly reduce memory consumption.\n        this.canvas.width = 0;\n        this.canvas.height = 0;\n        delete this.canvas;\n      }\n      this._resetZoomLayer();\n    }\n    if (this.svg) {\n      this.paintedViewportMap.delete(this.svg);\n      delete this.svg;\n    }\n\n    this.loadingIconDiv = document.createElement(\"div\");\n    this.loadingIconDiv.className = \"loadingIcon\";\n    div.appendChild(this.loadingIconDiv);\n  }\n\n  update(scale, rotation) {\n    this.scale = scale || this.scale;\n    // The rotation may be zero.\n    if (typeof rotation !== \"undefined\") {\n      this.rotation = rotation;\n    }\n\n    const totalRotation = (this.rotation + this.pdfPageRotate) % 360;\n    this.viewport = this.viewport.clone({\n      scale: this.scale * CSS_UNITS,\n      rotation: totalRotation,\n    });\n\n    if (this.svg) {\n      this.cssTransform(this.svg, true);\n\n      this.eventBus.dispatch(\"pagerendered\", {\n        source: this,\n        pageNumber: this.id,\n        cssTransform: true,\n        timestamp: performance.now(),\n      });\n      return;\n    }\n\n    let isScalingRestricted = false;\n    if (this.canvas && this.maxCanvasPixels > 0) {\n      const outputScale = this.outputScale;\n      if (\n        ((Math.floor(this.viewport.width) * outputScale.sx) | 0) *\n          ((Math.floor(this.viewport.height) * outputScale.sy) | 0) >\n        this.maxCanvasPixels\n      ) {\n        isScalingRestricted = true;\n      }\n    }\n\n    if (this.canvas) {\n      if (\n        this.useOnlyCssZoom ||\n        (this.hasRestrictedScaling && isScalingRestricted)\n      ) {\n        this.cssTransform(this.canvas, true);\n\n        this.eventBus.dispatch(\"pagerendered\", {\n          source: this,\n          pageNumber: this.id,\n          cssTransform: true,\n          timestamp: performance.now(),\n        });\n        return;\n      }\n      if (!this.zoomLayer && !this.canvas.hasAttribute(\"hidden\")) {\n        this.zoomLayer = this.canvas.parentNode;\n        this.zoomLayer.style.position = \"absolute\";\n      }\n    }\n    if (this.zoomLayer) {\n      this.cssTransform(this.zoomLayer.firstChild);\n    }\n    this.reset(/* keepZoomLayer = */ true, /* keepAnnotations = */ true);\n  }\n\n  /**\n   * PLEASE NOTE: Most likely you want to use the `this.reset()` method,\n   *              rather than calling this one directly.\n   */\n  cancelRendering(keepAnnotations = false) {\n    if (this.paintTask) {\n      this.paintTask.cancel();\n      this.paintTask = null;\n    }\n    this.resume = null;\n\n    if (this.textLayer) {\n      this.textLayer.cancel();\n      this.textLayer = null;\n    }\n    if (!keepAnnotations && this.annotationLayer) {\n      this.annotationLayer.cancel();\n      this.annotationLayer = null;\n    }\n  }\n\n  cssTransform(target, redrawAnnotations = false) {\n    // Scale target (canvas or svg), its wrapper and page container.\n    const width = this.viewport.width;\n    const height = this.viewport.height;\n    const div = this.div;\n    target.style.width = target.parentNode.style.width = div.style.width =\n      Math.floor(width) + \"px\";\n    target.style.height = target.parentNode.style.height = div.style.height =\n      Math.floor(height) + \"px\";\n    // The canvas may have been originally rotated; rotate relative to that.\n    const relativeRotation =\n      this.viewport.rotation - this.paintedViewportMap.get(target).rotation;\n    const absRotation = Math.abs(relativeRotation);\n    let scaleX = 1,\n      scaleY = 1;\n    if (absRotation === 90 || absRotation === 270) {\n      // Scale x and y because of the rotation.\n      scaleX = height / width;\n      scaleY = width / height;\n    }\n    const cssTransform =\n      \"rotate(\" +\n      relativeRotation +\n      \"deg) \" +\n      \"scale(\" +\n      scaleX +\n      \",\" +\n      scaleY +\n      \")\";\n    target.style.transform = cssTransform;\n\n    if (this.textLayer) {\n      // Rotating the text layer is more complicated since the divs inside the\n      // the text layer are rotated.\n      // TODO: This could probably be simplified by drawing the text layer in\n      // one orientation and then rotating overall.\n      const textLayerViewport = this.textLayer.viewport;\n      const textRelativeRotation =\n        this.viewport.rotation - textLayerViewport.rotation;\n      const textAbsRotation = Math.abs(textRelativeRotation);\n      let scale = width / textLayerViewport.width;\n      if (textAbsRotation === 90 || textAbsRotation === 270) {\n        scale = width / textLayerViewport.height;\n      }\n      const textLayerDiv = this.textLayer.textLayerDiv;\n      let transX, transY;\n      switch (textAbsRotation) {\n        case 0:\n          transX = transY = 0;\n          break;\n        case 90:\n          transX = 0;\n          transY = \"-\" + textLayerDiv.style.height;\n          break;\n        case 180:\n          transX = \"-\" + textLayerDiv.style.width;\n          transY = \"-\" + textLayerDiv.style.height;\n          break;\n        case 270:\n          transX = \"-\" + textLayerDiv.style.width;\n          transY = 0;\n          break;\n        default:\n          console.error(\"Bad rotation value.\");\n          break;\n      }\n\n      textLayerDiv.style.transform =\n        \"rotate(\" +\n        textAbsRotation +\n        \"deg) \" +\n        \"scale(\" +\n        scale +\n        \", \" +\n        scale +\n        \") \" +\n        \"translate(\" +\n        transX +\n        \", \" +\n        transY +\n        \")\";\n      textLayerDiv.style.transformOrigin = \"0% 0%\";\n    }\n\n    if (redrawAnnotations && this.annotationLayer) {\n      this.annotationLayer.render(this.viewport, \"display\");\n    }\n  }\n\n  get width() {\n    return this.viewport.width;\n  }\n\n  get height() {\n    return this.viewport.height;\n  }\n\n  getPagePoint(x, y) {\n    return this.viewport.convertToPdfPoint(x, y);\n  }\n\n  draw() {\n    if (this.renderingState !== RenderingStates.INITIAL) {\n      console.error(\"Must be in new state before drawing\");\n      this.reset(); // Ensure that we reset all state to prevent issues.\n    }\n    const { div, pdfPage } = this;\n\n    if (!pdfPage) {\n      this.renderingState = RenderingStates.FINISHED;\n\n      if (this.loadingIconDiv) {\n        div.removeChild(this.loadingIconDiv);\n        delete this.loadingIconDiv;\n      }\n      return Promise.reject(new Error(\"pdfPage is not loaded\"));\n    }\n\n    this.renderingState = RenderingStates.RUNNING;\n\n    // Wrap the canvas so that if it has a CSS transform for high DPI the\n    // overflow will be hidden in Firefox.\n    const canvasWrapper = document.createElement(\"div\");\n    canvasWrapper.style.width = div.style.width;\n    canvasWrapper.style.height = div.style.height;\n    canvasWrapper.classList.add(\"canvasWrapper\");\n\n    if (this.annotationLayer && this.annotationLayer.div) {\n      // The annotation layer needs to stay on top.\n      div.insertBefore(canvasWrapper, this.annotationLayer.div);\n    } else {\n      div.appendChild(canvasWrapper);\n    }\n\n    let textLayer = null;\n    if (this.textLayerMode !== TextLayerMode.DISABLE && this.textLayerFactory) {\n      const textLayerDiv = document.createElement(\"div\");\n      textLayerDiv.className = \"textLayer\";\n      textLayerDiv.style.width = canvasWrapper.style.width;\n      textLayerDiv.style.height = canvasWrapper.style.height;\n      if (this.annotationLayer && this.annotationLayer.div) {\n        // The annotation layer needs to stay on top.\n        div.insertBefore(textLayerDiv, this.annotationLayer.div);\n      } else {\n        div.appendChild(textLayerDiv);\n      }\n\n      textLayer = this.textLayerFactory.createTextLayerBuilder(\n        textLayerDiv,\n        this.id - 1,\n        this.viewport,\n        this.textLayerMode === TextLayerMode.ENABLE_ENHANCE,\n        this.eventBus\n      );\n    }\n    this.textLayer = textLayer;\n\n    let renderContinueCallback = null;\n    if (this.renderingQueue) {\n      renderContinueCallback = cont => {\n        if (!this.renderingQueue.isHighestPriority(this)) {\n          this.renderingState = RenderingStates.PAUSED;\n          this.resume = () => {\n            this.renderingState = RenderingStates.RUNNING;\n            cont();\n          };\n          return;\n        }\n        cont();\n      };\n    }\n\n    const finishPaintTask = async error => {\n      // The paintTask may have been replaced by a new one, so only remove\n      // the reference to the paintTask if it matches the one that is\n      // triggering this callback.\n      if (paintTask === this.paintTask) {\n        this.paintTask = null;\n      }\n\n      if (error instanceof RenderingCancelledException) {\n        this.error = null;\n        return;\n      }\n\n      this.renderingState = RenderingStates.FINISHED;\n\n      if (this.loadingIconDiv) {\n        div.removeChild(this.loadingIconDiv);\n        delete this.loadingIconDiv;\n      }\n      this._resetZoomLayer(/* removeFromDOM = */ true);\n\n      this.error = error;\n      this.stats = pdfPage.stats;\n\n      this.eventBus.dispatch(\"pagerendered\", {\n        source: this,\n        pageNumber: this.id,\n        cssTransform: false,\n        timestamp: performance.now(),\n      });\n\n      if (error) {\n        throw error;\n      }\n    };\n\n    const paintTask =\n      this.renderer === RendererType.SVG\n        ? this.paintOnSvg(canvasWrapper)\n        : this.paintOnCanvas(canvasWrapper);\n    paintTask.onRenderContinue = renderContinueCallback;\n    this.paintTask = paintTask;\n\n    const resultPromise = paintTask.promise.then(\n      function () {\n        return finishPaintTask(null).then(function () {\n          if (textLayer) {\n            const readableStream = pdfPage.streamTextContent({\n              normalizeWhitespace: true,\n            });\n            textLayer.setTextContentStream(readableStream);\n            textLayer.render();\n          }\n        });\n      },\n      function (reason) {\n        return finishPaintTask(reason);\n      }\n    );\n\n    if (this.annotationLayerFactory) {\n      if (!this.annotationLayer) {\n        this.annotationLayer = this.annotationLayerFactory.createAnnotationLayerBuilder(\n          div,\n          pdfPage,\n          this.imageResourcesPath,\n          this.renderInteractiveForms,\n          this.l10n\n        );\n      }\n      this.annotationLayer.render(this.viewport, \"display\");\n    }\n    div.setAttribute(\"data-loaded\", true);\n\n    this.eventBus.dispatch(\"pagerender\", {\n      source: this,\n      pageNumber: this.id,\n    });\n    return resultPromise;\n  }\n\n  paintOnCanvas(canvasWrapper) {\n    const renderCapability = createPromiseCapability();\n    const result = {\n      promise: renderCapability.promise,\n      onRenderContinue(cont) {\n        cont();\n      },\n      cancel() {\n        renderTask.cancel();\n      },\n    };\n\n    const viewport = this.viewport;\n    const canvas = document.createElement(\"canvas\");\n    this.l10n\n      .get(\"page_canvas\", { page: this.id }, \"Page {{page}}\")\n      .then(msg => {\n        canvas.setAttribute(\"aria-label\", msg);\n      });\n\n    // Keep the canvas hidden until the first draw callback, or until drawing\n    // is complete when `!this.renderingQueue`, to prevent black flickering.\n    canvas.setAttribute(\"hidden\", \"hidden\");\n    let isCanvasHidden = true;\n    const showCanvas = function () {\n      if (isCanvasHidden) {\n        canvas.removeAttribute(\"hidden\");\n        isCanvasHidden = false;\n      }\n    };\n\n    canvasWrapper.appendChild(canvas);\n    this.canvas = canvas;\n\n    if (\n      typeof PDFJSDev === \"undefined\" ||\n      PDFJSDev.test(\"MOZCENTRAL || GENERIC\")\n    ) {\n      canvas.mozOpaque = true;\n    }\n\n    const ctx = canvas.getContext(\"2d\", { alpha: false });\n    const outputScale = getOutputScale(ctx);\n    this.outputScale = outputScale;\n\n    if (this.useOnlyCssZoom) {\n      const actualSizeViewport = viewport.clone({ scale: CSS_UNITS });\n      // Use a scale that makes the canvas have the originally intended size\n      // of the page.\n      outputScale.sx *= actualSizeViewport.width / viewport.width;\n      outputScale.sy *= actualSizeViewport.height / viewport.height;\n      outputScale.scaled = true;\n    }\n\n    if (this.maxCanvasPixels > 0) {\n      const pixelsInViewport = viewport.width * viewport.height;\n      const maxScale = Math.sqrt(this.maxCanvasPixels / pixelsInViewport);\n      if (outputScale.sx > maxScale || outputScale.sy > maxScale) {\n        outputScale.sx = maxScale;\n        outputScale.sy = maxScale;\n        outputScale.scaled = true;\n        this.hasRestrictedScaling = true;\n      } else {\n        this.hasRestrictedScaling = false;\n      }\n    }\n\n    const sfx = approximateFraction(outputScale.sx);\n    const sfy = approximateFraction(outputScale.sy);\n    canvas.width = roundToDivide(viewport.width * outputScale.sx, sfx[0]);\n    canvas.height = roundToDivide(viewport.height * outputScale.sy, sfy[0]);\n    canvas.style.width = roundToDivide(viewport.width, sfx[1]) + \"px\";\n    canvas.style.height = roundToDivide(viewport.height, sfy[1]) + \"px\";\n    // Add the viewport so it's known what it was originally drawn with.\n    this.paintedViewportMap.set(canvas, viewport);\n\n    // Rendering area\n    const transform = !outputScale.scaled\n      ? null\n      : [outputScale.sx, 0, 0, outputScale.sy, 0, 0];\n    const renderContext = {\n      canvasContext: ctx,\n      transform,\n      viewport: this.viewport,\n      enableWebGL: this.enableWebGL,\n      renderInteractiveForms: this.renderInteractiveForms,\n    };\n    const renderTask = this.pdfPage.render(renderContext);\n    renderTask.onContinue = function (cont) {\n      showCanvas();\n      if (result.onRenderContinue) {\n        result.onRenderContinue(cont);\n      } else {\n        cont();\n      }\n    };\n\n    renderTask.promise.then(\n      function () {\n        showCanvas();\n        renderCapability.resolve(undefined);\n      },\n      function (error) {\n        showCanvas();\n        renderCapability.reject(error);\n      }\n    );\n    return result;\n  }\n\n  paintOnSvg(wrapper) {\n    if (\n      typeof PDFJSDev !== \"undefined\" &&\n      PDFJSDev.test(\"MOZCENTRAL || CHROME\")\n    ) {\n      // Return a mock object, to prevent errors such as e.g.\n      // \"TypeError: paintTask.promise is undefined\".\n      return {\n        promise: Promise.reject(new Error(\"SVG rendering is not supported.\")),\n        onRenderContinue(cont) {},\n        cancel() {},\n      };\n    }\n\n    let cancelled = false;\n    const ensureNotCancelled = () => {\n      if (cancelled) {\n        throw new RenderingCancelledException(\n          `Rendering cancelled, page ${this.id}`,\n          \"svg\"\n        );\n      }\n    };\n\n    const pdfPage = this.pdfPage;\n    const actualSizeViewport = this.viewport.clone({ scale: CSS_UNITS });\n    const promise = pdfPage.getOperatorList().then(opList => {\n      ensureNotCancelled();\n      const svgGfx = new SVGGraphics(pdfPage.commonObjs, pdfPage.objs);\n      return svgGfx.getSVG(opList, actualSizeViewport).then(svg => {\n        ensureNotCancelled();\n        this.svg = svg;\n        this.paintedViewportMap.set(svg, actualSizeViewport);\n\n        svg.style.width = wrapper.style.width;\n        svg.style.height = wrapper.style.height;\n        this.renderingState = RenderingStates.FINISHED;\n        wrapper.appendChild(svg);\n      });\n    });\n\n    return {\n      promise,\n      onRenderContinue(cont) {\n        cont();\n      },\n      cancel() {\n        cancelled = true;\n      },\n    };\n  }\n\n  /**\n   * @param {string|null} label\n   */\n  setPageLabel(label) {\n    this.pageLabel = typeof label === \"string\" ? label : null;\n\n    if (this.pageLabel !== null) {\n      this.div.setAttribute(\"data-page-label\", this.pageLabel);\n    } else {\n      this.div.removeAttribute(\"data-page-label\");\n    }\n  }\n}\n\nexport { PDFPageView };\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nconst CLEANUP_TIMEOUT = 30000;\n\nconst RenderingStates = {\n  INITIAL: 0,\n  RUNNING: 1,\n  PAUSED: 2,\n  FINISHED: 3,\n};\n\n/**\n * Controls rendering of the views for pages and thumbnails.\n */\nclass PDFRenderingQueue {\n  constructor() {\n    this.pdfViewer = null;\n    this.pdfThumbnailViewer = null;\n    this.onIdle = null;\n    this.highestPriorityPage = null;\n    this.idleTimeout = null;\n    this.printing = false;\n    this.isThumbnailViewEnabled = false;\n  }\n\n  /**\n   * @param {PDFViewer} pdfViewer\n   */\n  setViewer(pdfViewer) {\n    this.pdfViewer = pdfViewer;\n  }\n\n  /**\n   * @param {PDFThumbnailViewer} pdfThumbnailViewer\n   */\n  setThumbnailViewer(pdfThumbnailViewer) {\n    this.pdfThumbnailViewer = pdfThumbnailViewer;\n  }\n\n  /**\n   * @param {IRenderableView} view\n   * @returns {boolean}\n   */\n  isHighestPriority(view) {\n    return this.highestPriorityPage === view.renderingId;\n  }\n\n  /**\n   * @param {Object} currentlyVisiblePages\n   */\n  renderHighestPriority(currentlyVisiblePages) {\n    if (this.idleTimeout) {\n      clearTimeout(this.idleTimeout);\n      this.idleTimeout = null;\n    }\n\n    // Pages have a higher priority than thumbnails, so check them first.\n    if (this.pdfViewer.forceRendering(currentlyVisiblePages)) {\n      return;\n    }\n    // No pages needed rendering, so check thumbnails.\n    if (this.pdfThumbnailViewer && this.isThumbnailViewEnabled) {\n      if (this.pdfThumbnailViewer.forceRendering()) {\n        return;\n      }\n    }\n\n    if (this.printing) {\n      // If printing is currently ongoing do not reschedule cleanup.\n      return;\n    }\n\n    if (this.onIdle) {\n      this.idleTimeout = setTimeout(this.onIdle.bind(this), CLEANUP_TIMEOUT);\n    }\n  }\n\n  /**\n   * @param {Object} visible\n   * @param {Array} views\n   * @param {boolean} scrolledDown\n   */\n  getHighestPriority(visible, views, scrolledDown) {\n    /**\n     * The state has changed. Figure out which page has the highest priority to\n     * render next (if any).\n     *\n     * Priority:\n     * 1. visible pages\n     * 2. if last scrolled down, the page after the visible pages, or\n     *    if last scrolled up, the page before the visible pages\n     */\n    const visibleViews = visible.views;\n\n    const numVisible = visibleViews.length;\n    if (numVisible === 0) {\n      return null;\n    }\n    for (let i = 0; i < numVisible; ++i) {\n      const view = visibleViews[i].view;\n      if (!this.isViewFinished(view)) {\n        return view;\n      }\n    }\n\n    // All the visible views have rendered; try to render next/previous pages.\n    if (scrolledDown) {\n      const nextPageIndex = visible.last.id;\n      // IDs start at 1, so no need to add 1.\n      if (views[nextPageIndex] && !this.isViewFinished(views[nextPageIndex])) {\n        return views[nextPageIndex];\n      }\n    } else {\n      const previousPageIndex = visible.first.id - 2;\n      if (\n        views[previousPageIndex] &&\n        !this.isViewFinished(views[previousPageIndex])\n      ) {\n        return views[previousPageIndex];\n      }\n    }\n    // Everything that needs to be rendered has been.\n    return null;\n  }\n\n  /**\n   * @param {IRenderableView} view\n   * @returns {boolean}\n   */\n  isViewFinished(view) {\n    return view.renderingState === RenderingStates.FINISHED;\n  }\n\n  /**\n   * Render a page or thumbnail view. This calls the appropriate function\n   * based on the views state. If the view is already rendered it will return\n   * `false`.\n   *\n   * @param {IRenderableView} view\n   */\n  renderView(view) {\n    switch (view.renderingState) {\n      case RenderingStates.FINISHED:\n        return false;\n      case RenderingStates.PAUSED:\n        this.highestPriorityPage = view.renderingId;\n        view.resume();\n        break;\n      case RenderingStates.RUNNING:\n        this.highestPriorityPage = view.renderingId;\n        break;\n      case RenderingStates.INITIAL:\n        this.highestPriorityPage = view.renderingId;\n        view\n          .draw()\n          .finally(() => {\n            this.renderHighestPriority();\n          })\n          .catch(reason => {\n            console.error(`renderView: \"${reason}\"`);\n          });\n        break;\n    }\n    return true;\n  }\n}\n\nexport { RenderingStates, PDFRenderingQueue };\n","/* Copyright 2017 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { BaseViewer } from \"./base_viewer.js\";\nimport { shadow } from \"pdfjs-lib\";\n\nclass PDFSinglePageViewer extends BaseViewer {\n  constructor(options) {\n    super(options);\n\n    this.eventBus._on(\"pagesinit\", evt => {\n      // Since the pages are placed in a `DocumentFragment`, make sure that\n      // the current page becomes visible upon loading of the document.\n      this._ensurePageViewVisible();\n    });\n  }\n\n  get _viewerElement() {\n    // Since we only want to display *one* page at a time when using the\n    // `PDFSinglePageViewer`, we cannot append them to the `viewer` DOM element.\n    // Instead, they are placed in a `DocumentFragment`, and only the current\n    // page is displayed in the viewer (refer to `this._ensurePageViewVisible`).\n    return shadow(this, \"_viewerElement\", this._shadowViewer);\n  }\n\n  _resetView() {\n    super._resetView();\n    this._previousPageNumber = 1;\n    this._shadowViewer = document.createDocumentFragment();\n    this._updateScrollDown = null;\n  }\n\n  _ensurePageViewVisible() {\n    const pageView = this._pages[this._currentPageNumber - 1];\n    const previousPageView = this._pages[this._previousPageNumber - 1];\n\n    const viewerNodes = this.viewer.childNodes;\n    switch (viewerNodes.length) {\n      case 0: // Should *only* occur on initial loading.\n        this.viewer.appendChild(pageView.div);\n        break;\n      case 1: // The normal page-switching case.\n        if (viewerNodes[0] !== previousPageView.div) {\n          throw new Error(\n            \"_ensurePageViewVisible: Unexpected previously visible page.\"\n          );\n        }\n        if (pageView === previousPageView) {\n          break; // The correct page is already visible.\n        }\n        // Switch visible pages, and reset the viewerContainer scroll position.\n        this._shadowViewer.appendChild(previousPageView.div);\n        this.viewer.appendChild(pageView.div);\n\n        this.container.scrollTop = 0;\n        break;\n      default:\n        throw new Error(\n          \"_ensurePageViewVisible: Only one page should be visible at a time.\"\n        );\n    }\n    this._previousPageNumber = this._currentPageNumber;\n  }\n\n  _scrollUpdate() {\n    if (this._updateScrollDown) {\n      this._updateScrollDown();\n    }\n    super._scrollUpdate();\n  }\n\n  _scrollIntoView({ pageDiv, pageSpot = null, pageNumber = null }) {\n    if (pageNumber) {\n      // Ensure that `this._currentPageNumber` is correct.\n      this._setCurrentPageNumber(pageNumber);\n    }\n    const scrolledDown = this._currentPageNumber >= this._previousPageNumber;\n\n    this._ensurePageViewVisible();\n    // Ensure that rendering always occurs, to avoid showing a blank page,\n    // even if the current position doesn't change when the page is scrolled.\n    this.update();\n\n    super._scrollIntoView({ pageDiv, pageSpot, pageNumber });\n\n    // Since scrolling is tracked using `requestAnimationFrame`, update the\n    // scroll direction during the next `this._scrollUpdate` invocation.\n    this._updateScrollDown = () => {\n      this.scroll.down = scrolledDown;\n      this._updateScrollDown = null;\n    };\n  }\n\n  _getVisiblePages() {\n    return this._getCurrentVisiblePage();\n  }\n\n  _updateHelper(visiblePages) {}\n\n  get _isScrollModeHorizontal() {\n    // The Scroll/Spread modes are never used in `PDFSinglePageViewer`.\n    return shadow(this, \"_isScrollModeHorizontal\", false);\n  }\n\n  _updateScrollMode() {}\n\n  _updateSpreadMode() {}\n}\n\nexport { PDFSinglePageViewer };\n","/* Copyright 2014 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport {\n  CSS_UNITS,\n  DEFAULT_SCALE,\n  DEFAULT_SCALE_VALUE,\n  getVisibleElements,\n  isPortraitOrientation,\n  isValidRotation,\n  isValidScrollMode,\n  isValidSpreadMode,\n  MAX_AUTO_SCALE,\n  moveToEndOfArray,\n  NullL10n,\n  PresentationModeState,\n  RendererType,\n  SCROLLBAR_PADDING,\n  scrollIntoView,\n  ScrollMode,\n  SpreadMode,\n  TextLayerMode,\n  UNKNOWN_SCALE,\n  VERTICAL_PADDING,\n  watchScroll,\n} from \"./ui_utils.js\";\nimport { PDFRenderingQueue, RenderingStates } from \"./pdf_rendering_queue.js\";\nimport { AnnotationLayerBuilder } from \"./annotation_layer_builder.js\";\nimport { createPromiseCapability } from \"pdfjs-lib\";\nimport { PDFPageView } from \"./pdf_page_view.js\";\nimport { SimpleLinkService } from \"./pdf_link_service.js\";\nimport { TextLayerBuilder } from \"./text_layer_builder.js\";\n\nconst DEFAULT_CACHE_SIZE = 10;\n\n/**\n * @typedef {Object} PDFViewerOptions\n * @property {HTMLDivElement} container - The container for the viewer element.\n * @property {HTMLDivElement} [viewer] - The viewer element.\n * @property {EventBus} eventBus - The application event bus.\n * @property {IPDFLinkService} linkService - The navigation/linking service.\n * @property {DownloadManager} [downloadManager] - The download manager\n *   component.\n * @property {PDFFindController} [findController] - The find controller\n *   component.\n * @property {PDFRenderingQueue} [renderingQueue] - The rendering queue object.\n * @property {boolean} [removePageBorders] - Removes the border shadow around\n *   the pages. The default value is `false`.\n * @property {number} [textLayerMode] - Controls if the text layer used for\n *   selection and searching is created, and if the improved text selection\n *   behaviour is enabled. The constants from {TextLayerMode} should be used.\n *   The default value is `TextLayerMode.ENABLE`.\n * @property {string} [imageResourcesPath] - Path for image resources, mainly\n *   mainly for annotation icons. Include trailing slash.\n * @property {boolean} [renderInteractiveForms] - Enables rendering of\n *   interactive form elements. The default is `false`.\n * @property {boolean} [enablePrintAutoRotate] - Enables automatic rotation of\n *   pages whose orientation differ from the first page upon printing. The\n *   default is `false`.\n * @property {string} renderer - 'canvas' or 'svg'. The default is 'canvas'.\n * @property {boolean} [enableWebGL] - Enables WebGL accelerated rendering for\n *   some operations. The default value is `false`.\n * @property {boolean} [useOnlyCssZoom] - Enables CSS only zooming. The default\n *   value is `false`.\n * @property {number} [maxCanvasPixels] - The maximum supported canvas size in\n *   total pixels, i.e. width * height. Use -1 for no limit. The default value\n *   is 4096 * 4096 (16 mega-pixels).\n * @property {IL10n} l10n - Localization service.\n */\n\nfunction PDFPageViewBuffer(size) {\n  const data = [];\n  this.push = function (view) {\n    const i = data.indexOf(view);\n    if (i >= 0) {\n      data.splice(i, 1);\n    }\n    data.push(view);\n    if (data.length > size) {\n      data.shift().destroy();\n    }\n  };\n  /**\n   * After calling resize, the size of the buffer will be newSize. The optional\n   * parameter pagesToKeep is, if present, an array of pages to push to the back\n   * of the buffer, delaying their destruction. The size of pagesToKeep has no\n   * impact on the final size of the buffer; if pagesToKeep has length larger\n   * than newSize, some of those pages will be destroyed anyway.\n   */\n  this.resize = function (newSize, pagesToKeep) {\n    size = newSize;\n    if (pagesToKeep) {\n      const pageIdsToKeep = new Set();\n      for (let i = 0, iMax = pagesToKeep.length; i < iMax; ++i) {\n        pageIdsToKeep.add(pagesToKeep[i].id);\n      }\n      moveToEndOfArray(data, function (page) {\n        return pageIdsToKeep.has(page.id);\n      });\n    }\n    while (data.length > size) {\n      data.shift().destroy();\n    }\n  };\n}\n\nfunction isSameScale(oldScale, newScale) {\n  if (newScale === oldScale) {\n    return true;\n  }\n  if (Math.abs(newScale - oldScale) < 1e-15) {\n    // Prevent unnecessary re-rendering of all pages when the scale\n    // changes only because of limited numerical precision.\n    return true;\n  }\n  return false;\n}\n\n/**\n * Simple viewer control to display PDF content/pages.\n * @implements {IRenderableView}\n */\nclass BaseViewer {\n  /**\n   * @param {PDFViewerOptions} options\n   */\n  constructor(options) {\n    if (this.constructor === BaseViewer) {\n      throw new Error(\"Cannot initialize BaseViewer.\");\n    }\n    this._name = this.constructor.name;\n\n    this.container = options.container;\n    this.viewer = options.viewer || options.container.firstElementChild;\n    this.eventBus = options.eventBus;\n    this.linkService = options.linkService || new SimpleLinkService();\n    this.downloadManager = options.downloadManager || null;\n    this.findController = options.findController || null;\n    this.removePageBorders = options.removePageBorders || false;\n    this.textLayerMode = Number.isInteger(options.textLayerMode)\n      ? options.textLayerMode\n      : TextLayerMode.ENABLE;\n    this.imageResourcesPath = options.imageResourcesPath || \"\";\n    this.renderInteractiveForms = options.renderInteractiveForms || false;\n    this.enablePrintAutoRotate = options.enablePrintAutoRotate || false;\n    this.renderer = options.renderer || RendererType.CANVAS;\n    this.enableWebGL = options.enableWebGL || false;\n    this.useOnlyCssZoom = options.useOnlyCssZoom || false;\n    this.maxCanvasPixels = options.maxCanvasPixels;\n    this.l10n = options.l10n || NullL10n;\n\n    this.defaultRenderingQueue = !options.renderingQueue;\n    if (this.defaultRenderingQueue) {\n      // Custom rendering queue is not specified, using default one\n      this.renderingQueue = new PDFRenderingQueue();\n      this.renderingQueue.setViewer(this);\n    } else {\n      this.renderingQueue = options.renderingQueue;\n    }\n\n    this.scroll = watchScroll(this.container, this._scrollUpdate.bind(this));\n    this.presentationModeState = PresentationModeState.UNKNOWN;\n    this._onBeforeDraw = this._onAfterDraw = null;\n    this._resetView();\n\n    if (this.removePageBorders) {\n      this.viewer.classList.add(\"removePageBorders\");\n    }\n    // Defer the dispatching of this event, to give other viewer components\n    // time to initialize *and* register 'baseviewerinit' event listeners.\n    Promise.resolve().then(() => {\n      this.eventBus.dispatch(\"baseviewerinit\", { source: this });\n    });\n  }\n\n  get pagesCount() {\n    return this._pages.length;\n  }\n\n  getPageView(index) {\n    return this._pages[index];\n  }\n\n  /**\n   * @type {boolean} - True if all {PDFPageView} objects are initialized.\n   */\n  get pageViewsReady() {\n    if (!this._pagesCapability.settled) {\n      return false;\n    }\n    // Prevent printing errors when 'disableAutoFetch' is set, by ensuring\n    // that *all* pages have in fact been completely loaded.\n    return this._pages.every(function (pageView) {\n      return pageView && pageView.pdfPage;\n    });\n  }\n\n  /**\n   * @type {number}\n   */\n  get currentPageNumber() {\n    return this._currentPageNumber;\n  }\n\n  /**\n   * @param {number} val - The page number.\n   */\n  set currentPageNumber(val) {\n    if (!Number.isInteger(val)) {\n      throw new Error(\"Invalid page number.\");\n    }\n    if (!this.pdfDocument) {\n      return;\n    }\n    // The intent can be to just reset a scroll position and/or scale.\n    if (!this._setCurrentPageNumber(val, /* resetCurrentPageView = */ true)) {\n      console.error(\n        `${this._name}.currentPageNumber: \"${val}\" is not a valid page.`\n      );\n    }\n  }\n\n  /**\n   * @returns {boolean} Whether the pageNumber is valid (within bounds).\n   * @private\n   */\n  _setCurrentPageNumber(val, resetCurrentPageView = false) {\n    if (this._currentPageNumber === val) {\n      if (resetCurrentPageView) {\n        this._resetCurrentPageView();\n      }\n      return true;\n    }\n\n    if (!(0 < val && val <= this.pagesCount)) {\n      return false;\n    }\n    this._currentPageNumber = val;\n\n    this.eventBus.dispatch(\"pagechanging\", {\n      source: this,\n      pageNumber: val,\n      pageLabel: this._pageLabels && this._pageLabels[val - 1],\n    });\n\n    if (resetCurrentPageView) {\n      this._resetCurrentPageView();\n    }\n    return true;\n  }\n\n  /**\n   * @type {string|null} Returns the current page label, or `null` if no page\n   *   labels exist.\n   */\n  get currentPageLabel() {\n    return this._pageLabels && this._pageLabels[this._currentPageNumber - 1];\n  }\n\n  /**\n   * @param {string} val - The page label.\n   */\n  set currentPageLabel(val) {\n    if (!this.pdfDocument) {\n      return;\n    }\n    let page = val | 0; // Fallback page number.\n    if (this._pageLabels) {\n      const i = this._pageLabels.indexOf(val);\n      if (i >= 0) {\n        page = i + 1;\n      }\n    }\n    // The intent can be to just reset a scroll position and/or scale.\n    if (!this._setCurrentPageNumber(page, /* resetCurrentPageView = */ true)) {\n      console.error(\n        `${this._name}.currentPageLabel: \"${val}\" is not a valid page.`\n      );\n    }\n  }\n\n  /**\n   * @type {number}\n   */\n  get currentScale() {\n    return this._currentScale !== UNKNOWN_SCALE\n      ? this._currentScale\n      : DEFAULT_SCALE;\n  }\n\n  /**\n   * @param {number} val - Scale of the pages in percents.\n   */\n  set currentScale(val) {\n    if (isNaN(val)) {\n      throw new Error(\"Invalid numeric scale.\");\n    }\n    if (!this.pdfDocument) {\n      return;\n    }\n    this._setScale(val, false);\n  }\n\n  /**\n   * @type {string}\n   */\n  get currentScaleValue() {\n    return this._currentScaleValue;\n  }\n\n  /**\n   * @param val - The scale of the pages (in percent or predefined value).\n   */\n  set currentScaleValue(val) {\n    if (!this.pdfDocument) {\n      return;\n    }\n    this._setScale(val, false);\n  }\n\n  /**\n   * @type {number}\n   */\n  get pagesRotation() {\n    return this._pagesRotation;\n  }\n\n  /**\n   * @param {number} rotation - The rotation of the pages (0, 90, 180, 270).\n   */\n  set pagesRotation(rotation) {\n    if (!isValidRotation(rotation)) {\n      throw new Error(\"Invalid pages rotation angle.\");\n    }\n    if (!this.pdfDocument) {\n      return;\n    }\n    if (this._pagesRotation === rotation) {\n      return; // The rotation didn't change.\n    }\n    this._pagesRotation = rotation;\n\n    const pageNumber = this._currentPageNumber;\n\n    for (let i = 0, ii = this._pages.length; i < ii; i++) {\n      const pageView = this._pages[i];\n      pageView.update(pageView.scale, rotation);\n    }\n    // Prevent errors in case the rotation changes *before* the scale has been\n    // set to a non-default value.\n    if (this._currentScaleValue) {\n      this._setScale(this._currentScaleValue, true);\n    }\n\n    this.eventBus.dispatch(\"rotationchanging\", {\n      source: this,\n      pagesRotation: rotation,\n      pageNumber,\n    });\n\n    if (this.defaultRenderingQueue) {\n      this.update();\n    }\n  }\n\n  get firstPagePromise() {\n    return this.pdfDocument ? this._firstPageCapability.promise : null;\n  }\n\n  get onePageRendered() {\n    return this.pdfDocument ? this._onePageRenderedCapability.promise : null;\n  }\n\n  get pagesPromise() {\n    return this.pdfDocument ? this._pagesCapability.promise : null;\n  }\n\n  /**\n   * @private\n   */\n  get _viewerElement() {\n    // In most viewers, e.g. `PDFViewer`, this should return `this.viewer`.\n    throw new Error(\"Not implemented: _viewerElement\");\n  }\n\n  /**\n   * @private\n   */\n  _onePageRenderedOrForceFetch() {\n    // Unless the viewer *and* its pages are visible, rendering won't start and\n    // `this._onePageRenderedCapability` thus won't be resolved.\n    // To ensure that automatic printing, on document load, still works even in\n    // those cases we force-allow fetching of all pages when:\n    //  - The viewer is hidden in the DOM, e.g. in a `display: none` <iframe>\n    //    element; fixes bug 1618621.\n    //  - The viewer is visible, but none of the pages are (e.g. if the\n    //    viewer is very small); fixes bug 1618955.\n    if (\n      !this.container.offsetParent ||\n      this._getVisiblePages().views.length === 0\n    ) {\n      return Promise.resolve();\n    }\n    return this._onePageRenderedCapability.promise;\n  }\n\n  /**\n   * @param pdfDocument {PDFDocument}\n   */\n  setDocument(pdfDocument) {\n    if (this.pdfDocument) {\n      this._cancelRendering();\n      this._resetView();\n\n      if (this.findController) {\n        this.findController.setDocument(null);\n      }\n    }\n\n    this.pdfDocument = pdfDocument;\n    if (!pdfDocument) {\n      return;\n    }\n    const pagesCount = pdfDocument.numPages;\n    const firstPagePromise = pdfDocument.getPage(1);\n\n    this._pagesCapability.promise.then(() => {\n      this.eventBus.dispatch(\"pagesloaded\", {\n        source: this,\n        pagesCount,\n      });\n    });\n\n    this._onBeforeDraw = evt => {\n      const pageView = this._pages[evt.pageNumber - 1];\n      if (!pageView) {\n        return;\n      }\n      // Add the page to the buffer at the start of drawing. That way it can be\n      // evicted from the buffer and destroyed even if we pause its rendering.\n      this._buffer.push(pageView);\n    };\n    this.eventBus._on(\"pagerender\", this._onBeforeDraw);\n\n    this._onAfterDraw = evt => {\n      if (evt.cssTransform || this._onePageRenderedCapability.settled) {\n        return;\n      }\n      this._onePageRenderedCapability.resolve();\n\n      this.eventBus._off(\"pagerendered\", this._onAfterDraw);\n      this._onAfterDraw = null;\n    };\n    this.eventBus._on(\"pagerendered\", this._onAfterDraw);\n\n    // Fetch a single page so we can get a viewport that will be the default\n    // viewport for all pages\n    firstPagePromise\n      .then(firstPdfPage => {\n        this._firstPageCapability.resolve(firstPdfPage);\n\n        const scale = this.currentScale;\n        const viewport = firstPdfPage.getViewport({ scale: scale * CSS_UNITS });\n        const textLayerFactory =\n          this.textLayerMode !== TextLayerMode.DISABLE ? this : null;\n\n        for (let pageNum = 1; pageNum <= pagesCount; ++pageNum) {\n          const pageView = new PDFPageView({\n            container: this._viewerElement,\n            eventBus: this.eventBus,\n            id: pageNum,\n            scale,\n            defaultViewport: viewport.clone(),\n            renderingQueue: this.renderingQueue,\n            textLayerFactory,\n            textLayerMode: this.textLayerMode,\n            annotationLayerFactory: this,\n            imageResourcesPath: this.imageResourcesPath,\n            renderInteractiveForms: this.renderInteractiveForms,\n            renderer: this.renderer,\n            enableWebGL: this.enableWebGL,\n            useOnlyCssZoom: this.useOnlyCssZoom,\n            maxCanvasPixels: this.maxCanvasPixels,\n            l10n: this.l10n,\n          });\n          this._pages.push(pageView);\n        }\n        // Set the first `pdfPage` immediately, since it's already loaded,\n        // rather than having to repeat the `PDFDocumentProxy.getPage` call in\n        // the `this._ensurePdfPageLoaded` method before rendering can start.\n        const firstPageView = this._pages[0];\n        if (firstPageView) {\n          firstPageView.setPdfPage(firstPdfPage);\n          this.linkService.cachePageRef(1, firstPdfPage.ref);\n        }\n        if (this._spreadMode !== SpreadMode.NONE) {\n          this._updateSpreadMode();\n        }\n\n        // Fetch all the pages since the viewport is needed before printing\n        // starts to create the correct size canvas. Wait until one page is\n        // rendered so we don't tie up too many resources early on.\n        this._onePageRenderedOrForceFetch().then(() => {\n          if (this.findController) {\n            this.findController.setDocument(pdfDocument); // Enable searching.\n          }\n\n          // In addition to 'disableAutoFetch' being set, also attempt to reduce\n          // resource usage when loading *very* long/large documents.\n          if (pdfDocument.loadingParams.disableAutoFetch || pagesCount > 7500) {\n            // XXX: Printing is semi-broken with auto fetch disabled.\n            this._pagesCapability.resolve();\n            return;\n          }\n          let getPagesLeft = pagesCount - 1; // The first page was already loaded.\n\n          if (getPagesLeft <= 0) {\n            this._pagesCapability.resolve();\n            return;\n          }\n          for (let pageNum = 2; pageNum <= pagesCount; ++pageNum) {\n            pdfDocument.getPage(pageNum).then(\n              pdfPage => {\n                const pageView = this._pages[pageNum - 1];\n                if (!pageView.pdfPage) {\n                  pageView.setPdfPage(pdfPage);\n                }\n                this.linkService.cachePageRef(pageNum, pdfPage.ref);\n                if (--getPagesLeft === 0) {\n                  this._pagesCapability.resolve();\n                }\n              },\n              reason => {\n                console.error(\n                  `Unable to get page ${pageNum} to initialize viewer`,\n                  reason\n                );\n                if (--getPagesLeft === 0) {\n                  this._pagesCapability.resolve();\n                }\n              }\n            );\n          }\n        });\n\n        this.eventBus.dispatch(\"pagesinit\", { source: this });\n\n        if (this.defaultRenderingQueue) {\n          this.update();\n        }\n      })\n      .catch(reason => {\n        console.error(\"Unable to initialize viewer\", reason);\n      });\n  }\n\n  /**\n   * @param {Array|null} labels\n   */\n  setPageLabels(labels) {\n    if (!this.pdfDocument) {\n      return;\n    }\n    if (!labels) {\n      this._pageLabels = null;\n    } else if (\n      !(Array.isArray(labels) && this.pdfDocument.numPages === labels.length)\n    ) {\n      this._pageLabels = null;\n      console.error(`${this._name}.setPageLabels: Invalid page labels.`);\n    } else {\n      this._pageLabels = labels;\n    }\n    // Update all the `PDFPageView` instances.\n    for (let i = 0, ii = this._pages.length; i < ii; i++) {\n      const pageView = this._pages[i];\n      const label = this._pageLabels && this._pageLabels[i];\n      pageView.setPageLabel(label);\n    }\n  }\n\n  _resetView() {\n    this._pages = [];\n    this._currentPageNumber = 1;\n    this._currentScale = UNKNOWN_SCALE;\n    this._currentScaleValue = null;\n    this._pageLabels = null;\n    this._buffer = new PDFPageViewBuffer(DEFAULT_CACHE_SIZE);\n    this._location = null;\n    this._pagesRotation = 0;\n    this._pagesRequests = new WeakMap();\n    this._firstPageCapability = createPromiseCapability();\n    this._onePageRenderedCapability = createPromiseCapability();\n    this._pagesCapability = createPromiseCapability();\n    this._scrollMode = ScrollMode.VERTICAL;\n    this._spreadMode = SpreadMode.NONE;\n\n    if (this._onBeforeDraw) {\n      this.eventBus._off(\"pagerender\", this._onBeforeDraw);\n      this._onBeforeDraw = null;\n    }\n    if (this._onAfterDraw) {\n      this.eventBus._off(\"pagerendered\", this._onAfterDraw);\n      this._onAfterDraw = null;\n    }\n    // Remove the pages from the DOM...\n    this.viewer.textContent = \"\";\n    // ... and reset the Scroll mode CSS class(es) afterwards.\n    this._updateScrollMode();\n  }\n\n  _scrollUpdate() {\n    if (this.pagesCount === 0) {\n      return;\n    }\n    this.update();\n  }\n\n  _scrollIntoView({ pageDiv, pageSpot = null, pageNumber = null }) {\n    scrollIntoView(pageDiv, pageSpot);\n  }\n\n  _setScaleUpdatePages(newScale, newValue, noScroll = false, preset = false) {\n    this._currentScaleValue = newValue.toString();\n\n    if (isSameScale(this._currentScale, newScale)) {\n      if (preset) {\n        this.eventBus.dispatch(\"scalechanging\", {\n          source: this,\n          scale: newScale,\n          presetValue: newValue,\n        });\n      }\n      return;\n    }\n\n    for (let i = 0, ii = this._pages.length; i < ii; i++) {\n      this._pages[i].update(newScale);\n    }\n    this._currentScale = newScale;\n\n    if (!noScroll) {\n      let page = this._currentPageNumber,\n        dest;\n      if (\n        this._location &&\n        !(this.isInPresentationMode || this.isChangingPresentationMode)\n      ) {\n        page = this._location.pageNumber;\n        dest = [\n          null,\n          { name: \"XYZ\" },\n          this._location.left,\n          this._location.top,\n          null,\n        ];\n      }\n      this.scrollPageIntoView({\n        pageNumber: page,\n        destArray: dest,\n        allowNegativeOffset: true,\n      });\n    }\n\n    this.eventBus.dispatch(\"scalechanging\", {\n      source: this,\n      scale: newScale,\n      presetValue: preset ? newValue : undefined,\n    });\n\n    if (this.defaultRenderingQueue) {\n      this.update();\n    }\n  }\n\n  _setScale(value, noScroll = false) {\n    let scale = parseFloat(value);\n\n    if (scale > 0) {\n      this._setScaleUpdatePages(scale, value, noScroll, /* preset = */ false);\n    } else {\n      const currentPage = this._pages[this._currentPageNumber - 1];\n      if (!currentPage) {\n        return;\n      }\n      const noPadding = this.isInPresentationMode || this.removePageBorders;\n      let hPadding = noPadding ? 0 : SCROLLBAR_PADDING;\n      let vPadding = noPadding ? 0 : VERTICAL_PADDING;\n\n      if (!noPadding && this._isScrollModeHorizontal) {\n        [hPadding, vPadding] = [vPadding, hPadding]; // Swap the padding values.\n      }\n      const pageWidthScale =\n        ((this.container.clientWidth - hPadding) / currentPage.width) *\n        currentPage.scale;\n      const pageHeightScale =\n        ((this.container.clientHeight - vPadding) / currentPage.height) *\n        currentPage.scale;\n      switch (value) {\n        case \"page-actual\":\n          scale = 1;\n          break;\n        case \"page-width\":\n          scale = pageWidthScale;\n          break;\n        case \"page-height\":\n          scale = pageHeightScale;\n          break;\n        case \"page-fit\":\n          scale = Math.min(pageWidthScale, pageHeightScale);\n          break;\n        case \"auto\":\n          // For pages in landscape mode, fit the page height to the viewer\n          // *unless* the page would thus become too wide to fit horizontally.\n          const horizontalScale = isPortraitOrientation(currentPage)\n            ? pageWidthScale\n            : Math.min(pageHeightScale, pageWidthScale);\n          scale = Math.min(MAX_AUTO_SCALE, horizontalScale);\n          break;\n        default:\n          console.error(\n            `${this._name}._setScale: \"${value}\" is an unknown zoom value.`\n          );\n          return;\n      }\n      this._setScaleUpdatePages(scale, value, noScroll, /* preset = */ true);\n    }\n  }\n\n  /**\n   * Refreshes page view: scrolls to the current page and updates the scale.\n   * @private\n   */\n  _resetCurrentPageView() {\n    if (this.isInPresentationMode) {\n      // Fixes the case when PDF has different page sizes.\n      this._setScale(this._currentScaleValue, true);\n    }\n\n    const pageView = this._pages[this._currentPageNumber - 1];\n    this._scrollIntoView({ pageDiv: pageView.div });\n  }\n\n  /**\n   * @typedef ScrollPageIntoViewParameters\n   * @property {number} pageNumber - The page number.\n   * @property {Array} [destArray] - The original PDF destination array, in the\n   *   format: <page-ref> </XYZ|/FitXXX> <args..>\n   * @property {boolean} [allowNegativeOffset] - Allow negative page offsets.\n   *   The default value is `false`.\n   * @property {boolean} [ignoreDestinationZoom] - Ignore the zoom argument in\n   *   the destination array. The default value is `false`.\n   */\n\n  /**\n   * Scrolls page into view.\n   * @param {ScrollPageIntoViewParameters} params\n   */\n  scrollPageIntoView({\n    pageNumber,\n    destArray = null,\n    allowNegativeOffset = false,\n    ignoreDestinationZoom = false,\n  }) {\n    if (!this.pdfDocument) {\n      return;\n    }\n    const pageView =\n      Number.isInteger(pageNumber) && this._pages[pageNumber - 1];\n    if (!pageView) {\n      console.error(\n        `${this._name}.scrollPageIntoView: ` +\n          `\"${pageNumber}\" is not a valid pageNumber parameter.`\n      );\n      return;\n    }\n\n    if (this.isInPresentationMode || !destArray) {\n      this._setCurrentPageNumber(pageNumber, /* resetCurrentPageView = */ true);\n      return;\n    }\n    let x = 0,\n      y = 0;\n    let width = 0,\n      height = 0,\n      widthScale,\n      heightScale;\n    const changeOrientation = pageView.rotation % 180 !== 0;\n    const pageWidth =\n      (changeOrientation ? pageView.height : pageView.width) /\n      pageView.scale /\n      CSS_UNITS;\n    const pageHeight =\n      (changeOrientation ? pageView.width : pageView.height) /\n      pageView.scale /\n      CSS_UNITS;\n    let scale = 0;\n    switch (destArray[1].name) {\n      case \"XYZ\":\n        x = destArray[2];\n        y = destArray[3];\n        scale = destArray[4];\n        // If x and/or y coordinates are not supplied, default to\n        // _top_ left of the page (not the obvious bottom left,\n        // since aligning the bottom of the intended page with the\n        // top of the window is rarely helpful).\n        x = x !== null ? x : 0;\n        y = y !== null ? y : pageHeight;\n        break;\n      case \"Fit\":\n      case \"FitB\":\n        scale = \"page-fit\";\n        break;\n      case \"FitH\":\n      case \"FitBH\":\n        y = destArray[2];\n        scale = \"page-width\";\n        // According to the PDF spec, section 12.3.2.2, a `null` value in the\n        // parameter should maintain the position relative to the new page.\n        if (y === null && this._location) {\n          x = this._location.left;\n          y = this._location.top;\n        }\n        break;\n      case \"FitV\":\n      case \"FitBV\":\n        x = destArray[2];\n        width = pageWidth;\n        height = pageHeight;\n        scale = \"page-height\";\n        break;\n      case \"FitR\":\n        x = destArray[2];\n        y = destArray[3];\n        width = destArray[4] - x;\n        height = destArray[5] - y;\n        const hPadding = this.removePageBorders ? 0 : SCROLLBAR_PADDING;\n        const vPadding = this.removePageBorders ? 0 : VERTICAL_PADDING;\n\n        widthScale =\n          (this.container.clientWidth - hPadding) / width / CSS_UNITS;\n        heightScale =\n          (this.container.clientHeight - vPadding) / height / CSS_UNITS;\n        scale = Math.min(Math.abs(widthScale), Math.abs(heightScale));\n        break;\n      default:\n        console.error(\n          `${this._name}.scrollPageIntoView: ` +\n            `\"${destArray[1].name}\" is not a valid destination type.`\n        );\n        return;\n    }\n\n    if (!ignoreDestinationZoom) {\n      if (scale && scale !== this._currentScale) {\n        this.currentScaleValue = scale;\n      } else if (this._currentScale === UNKNOWN_SCALE) {\n        this.currentScaleValue = DEFAULT_SCALE_VALUE;\n      }\n    }\n\n    if (scale === \"page-fit\" && !destArray[4]) {\n      this._scrollIntoView({\n        pageDiv: pageView.div,\n        pageNumber,\n      });\n      return;\n    }\n\n    const boundingRect = [\n      pageView.viewport.convertToViewportPoint(x, y),\n      pageView.viewport.convertToViewportPoint(x + width, y + height),\n    ];\n    let left = Math.min(boundingRect[0][0], boundingRect[1][0]);\n    let top = Math.min(boundingRect[0][1], boundingRect[1][1]);\n\n    if (!allowNegativeOffset) {\n      // Some bad PDF generators will create destinations with e.g. top values\n      // that exceeds the page height. Ensure that offsets are not negative,\n      // to prevent a previous page from becoming visible (fixes bug 874482).\n      left = Math.max(left, 0);\n      top = Math.max(top, 0);\n    }\n    this._scrollIntoView({\n      pageDiv: pageView.div,\n      pageSpot: { left, top },\n      pageNumber,\n    });\n  }\n\n  _updateLocation(firstPage) {\n    const currentScale = this._currentScale;\n    const currentScaleValue = this._currentScaleValue;\n    const normalizedScaleValue =\n      parseFloat(currentScaleValue) === currentScale\n        ? Math.round(currentScale * 10000) / 100\n        : currentScaleValue;\n\n    const pageNumber = firstPage.id;\n    let pdfOpenParams = \"#page=\" + pageNumber;\n    pdfOpenParams += \"&zoom=\" + normalizedScaleValue;\n    const currentPageView = this._pages[pageNumber - 1];\n    const container = this.container;\n    const topLeft = currentPageView.getPagePoint(\n      container.scrollLeft - firstPage.x,\n      container.scrollTop - firstPage.y\n    );\n    const intLeft = Math.round(topLeft[0]);\n    const intTop = Math.round(topLeft[1]);\n    pdfOpenParams += \",\" + intLeft + \",\" + intTop;\n\n    this._location = {\n      pageNumber,\n      scale: normalizedScaleValue,\n      top: intTop,\n      left: intLeft,\n      rotation: this._pagesRotation,\n      pdfOpenParams,\n    };\n  }\n\n  _updateHelper(visiblePages) {\n    throw new Error(\"Not implemented: _updateHelper\");\n  }\n\n  update() {\n    const visible = this._getVisiblePages();\n    const visiblePages = visible.views,\n      numVisiblePages = visiblePages.length;\n\n    if (numVisiblePages === 0) {\n      return;\n    }\n    const newCacheSize = Math.max(DEFAULT_CACHE_SIZE, 2 * numVisiblePages + 1);\n    this._buffer.resize(newCacheSize, visiblePages);\n\n    this.renderingQueue.renderHighestPriority(visible);\n\n    this._updateHelper(visiblePages); // Run any class-specific update code.\n\n    this._updateLocation(visible.first);\n    this.eventBus.dispatch(\"updateviewarea\", {\n      source: this,\n      location: this._location,\n    });\n  }\n\n  containsElement(element) {\n    return this.container.contains(element);\n  }\n\n  focus() {\n    this.container.focus();\n  }\n\n  get _isScrollModeHorizontal() {\n    // Used to ensure that pre-rendering of the next/previous page works\n    // correctly, since Scroll/Spread modes are ignored in Presentation Mode.\n    return this.isInPresentationMode\n      ? false\n      : this._scrollMode === ScrollMode.HORIZONTAL;\n  }\n\n  get isInPresentationMode() {\n    return this.presentationModeState === PresentationModeState.FULLSCREEN;\n  }\n\n  get isChangingPresentationMode() {\n    return this.presentationModeState === PresentationModeState.CHANGING;\n  }\n\n  get isHorizontalScrollbarEnabled() {\n    return this.isInPresentationMode\n      ? false\n      : this.container.scrollWidth > this.container.clientWidth;\n  }\n\n  get isVerticalScrollbarEnabled() {\n    return this.isInPresentationMode\n      ? false\n      : this.container.scrollHeight > this.container.clientHeight;\n  }\n\n  /**\n   * Helper method for `this._getVisiblePages`. Should only ever be used when\n   * the viewer can only display a single page at a time, for example in:\n   *  - `PDFSinglePageViewer`.\n   *  - `PDFViewer` with Presentation Mode active.\n   */\n  _getCurrentVisiblePage() {\n    if (!this.pagesCount) {\n      return { views: [] };\n    }\n    const pageView = this._pages[this._currentPageNumber - 1];\n    // NOTE: Compute the `x` and `y` properties of the current view,\n    // since `this._updateLocation` depends of them being available.\n    const element = pageView.div;\n\n    const view = {\n      id: pageView.id,\n      x: element.offsetLeft + element.clientLeft,\n      y: element.offsetTop + element.clientTop,\n      view: pageView,\n    };\n    return { first: view, last: view, views: [view] };\n  }\n\n  _getVisiblePages() {\n    return getVisibleElements(\n      this.container,\n      this._pages,\n      true,\n      this._isScrollModeHorizontal\n    );\n  }\n\n  /**\n   * @param {number} pageNumber\n   */\n  isPageVisible(pageNumber) {\n    if (!this.pdfDocument) {\n      return false;\n    }\n    if (pageNumber < 1 || pageNumber > this.pagesCount) {\n      console.error(\n        `${this._name}.isPageVisible: \"${pageNumber}\" is out of bounds.`\n      );\n      return false;\n    }\n    return this._getVisiblePages().views.some(function (view) {\n      return view.id === pageNumber;\n    });\n  }\n\n  cleanup() {\n    for (let i = 0, ii = this._pages.length; i < ii; i++) {\n      if (\n        this._pages[i] &&\n        this._pages[i].renderingState !== RenderingStates.FINISHED\n      ) {\n        this._pages[i].reset();\n      }\n    }\n  }\n\n  /**\n   * @private\n   */\n  _cancelRendering() {\n    for (let i = 0, ii = this._pages.length; i < ii; i++) {\n      if (this._pages[i]) {\n        this._pages[i].cancelRendering();\n      }\n    }\n  }\n\n  /**\n   * @param {PDFPageView} pageView\n   * @returns {Promise} Returns a promise containing a {PDFPageProxy} object.\n   * @private\n   */\n  _ensurePdfPageLoaded(pageView) {\n    if (pageView.pdfPage) {\n      return Promise.resolve(pageView.pdfPage);\n    }\n    if (this._pagesRequests.has(pageView)) {\n      return this._pagesRequests.get(pageView);\n    }\n    const promise = this.pdfDocument\n      .getPage(pageView.id)\n      .then(pdfPage => {\n        if (!pageView.pdfPage) {\n          pageView.setPdfPage(pdfPage);\n        }\n        this._pagesRequests.delete(pageView);\n        return pdfPage;\n      })\n      .catch(reason => {\n        console.error(\"Unable to get page for page view\", reason);\n        // Page error -- there is nothing that can be done.\n        this._pagesRequests.delete(pageView);\n      });\n    this._pagesRequests.set(pageView, promise);\n    return promise;\n  }\n\n  forceRendering(currentlyVisiblePages) {\n    const visiblePages = currentlyVisiblePages || this._getVisiblePages();\n    const scrollAhead = this._isScrollModeHorizontal\n      ? this.scroll.right\n      : this.scroll.down;\n    const pageView = this.renderingQueue.getHighestPriority(\n      visiblePages,\n      this._pages,\n      scrollAhead\n    );\n    if (pageView) {\n      this._ensurePdfPageLoaded(pageView).then(() => {\n        this.renderingQueue.renderView(pageView);\n      });\n      return true;\n    }\n    return false;\n  }\n\n  /**\n   * @param {HTMLDivElement} textLayerDiv\n   * @param {number} pageIndex\n   * @param {PageViewport} viewport\n   * @param {boolean} enhanceTextSelection\n   * @param {EventBus} eventBus\n   * @returns {TextLayerBuilder}\n   */\n  createTextLayerBuilder(\n    textLayerDiv,\n    pageIndex,\n    viewport,\n    enhanceTextSelection = false,\n    eventBus\n  ) {\n    return new TextLayerBuilder({\n      textLayerDiv,\n      eventBus,\n      pageIndex,\n      viewport,\n      findController: this.isInPresentationMode ? null : this.findController,\n      enhanceTextSelection: this.isInPresentationMode\n        ? false\n        : enhanceTextSelection,\n    });\n  }\n\n  /**\n   * @param {HTMLDivElement} pageDiv\n   * @param {PDFPage} pdfPage\n   * @param {string} [imageResourcesPath] - Path for image resources, mainly\n   *   for annotation icons. Include trailing slash.\n   * @param {boolean} renderInteractiveForms\n   * @param {IL10n} l10n\n   * @returns {AnnotationLayerBuilder}\n   */\n  createAnnotationLayerBuilder(\n    pageDiv,\n    pdfPage,\n    imageResourcesPath = \"\",\n    renderInteractiveForms = false,\n    l10n = NullL10n\n  ) {\n    return new AnnotationLayerBuilder({\n      pageDiv,\n      pdfPage,\n      imageResourcesPath,\n      renderInteractiveForms,\n      linkService: this.linkService,\n      downloadManager: this.downloadManager,\n      l10n,\n    });\n  }\n\n  /**\n   * @type {boolean} Whether all pages of the PDF document have identical\n   *   widths and heights.\n   */\n  get hasEqualPageSizes() {\n    const firstPageView = this._pages[0];\n    for (let i = 1, ii = this._pages.length; i < ii; ++i) {\n      const pageView = this._pages[i];\n      if (\n        pageView.width !== firstPageView.width ||\n        pageView.height !== firstPageView.height\n      ) {\n        return false;\n      }\n    }\n    return true;\n  }\n\n  /**\n   * Returns sizes of the pages.\n   * @returns {Array} Array of objects with width/height/rotation fields.\n   */\n  getPagesOverview() {\n    const pagesOverview = this._pages.map(function (pageView) {\n      const viewport = pageView.pdfPage.getViewport({ scale: 1 });\n      return {\n        width: viewport.width,\n        height: viewport.height,\n        rotation: viewport.rotation,\n      };\n    });\n    if (!this.enablePrintAutoRotate) {\n      return pagesOverview;\n    }\n    const isFirstPagePortrait = isPortraitOrientation(pagesOverview[0]);\n    return pagesOverview.map(function (size) {\n      if (isFirstPagePortrait === isPortraitOrientation(size)) {\n        return size;\n      }\n      return {\n        width: size.height,\n        height: size.width,\n        rotation: (size.rotation + 90) % 360,\n      };\n    });\n  }\n\n  /**\n   * @type {number} One of the values in {ScrollMode}.\n   */\n  get scrollMode() {\n    return this._scrollMode;\n  }\n\n  /**\n   * @param {number} mode - The direction in which the document pages should be\n   *   laid out within the scrolling container.\n   *   The constants from {ScrollMode} should be used.\n   */\n  set scrollMode(mode) {\n    if (this._scrollMode === mode) {\n      return; // The Scroll mode didn't change.\n    }\n    if (!isValidScrollMode(mode)) {\n      throw new Error(`Invalid scroll mode: ${mode}`);\n    }\n    this._scrollMode = mode;\n    this.eventBus.dispatch(\"scrollmodechanged\", { source: this, mode });\n\n    this._updateScrollMode(/* pageNumber = */ this._currentPageNumber);\n  }\n\n  _updateScrollMode(pageNumber = null) {\n    const scrollMode = this._scrollMode,\n      viewer = this.viewer;\n\n    viewer.classList.toggle(\n      \"scrollHorizontal\",\n      scrollMode === ScrollMode.HORIZONTAL\n    );\n    viewer.classList.toggle(\"scrollWrapped\", scrollMode === ScrollMode.WRAPPED);\n\n    if (!this.pdfDocument || !pageNumber) {\n      return;\n    }\n    // Non-numeric scale values can be sensitive to the scroll orientation.\n    // Call this before re-scrolling to the current page, to ensure that any\n    // changes in scale don't move the current page.\n    if (this._currentScaleValue && isNaN(this._currentScaleValue)) {\n      this._setScale(this._currentScaleValue, true);\n    }\n    this._setCurrentPageNumber(pageNumber, /* resetCurrentPageView = */ true);\n    this.update();\n  }\n\n  /**\n   * @type {number} One of the values in {SpreadMode}.\n   */\n  get spreadMode() {\n    return this._spreadMode;\n  }\n\n  /**\n   * @param {number} mode - Group the pages in spreads, starting with odd- or\n   *   even-number pages (unless `SpreadMode.NONE` is used).\n   *   The constants from {SpreadMode} should be used.\n   */\n  set spreadMode(mode) {\n    if (this._spreadMode === mode) {\n      return; // The Spread mode didn't change.\n    }\n    if (!isValidSpreadMode(mode)) {\n      throw new Error(`Invalid spread mode: ${mode}`);\n    }\n    this._spreadMode = mode;\n    this.eventBus.dispatch(\"spreadmodechanged\", { source: this, mode });\n\n    this._updateSpreadMode(/* pageNumber = */ this._currentPageNumber);\n  }\n\n  _updateSpreadMode(pageNumber = null) {\n    if (!this.pdfDocument) {\n      return;\n    }\n    const viewer = this.viewer,\n      pages = this._pages;\n    // Temporarily remove all the pages from the DOM.\n    viewer.textContent = \"\";\n\n    if (this._spreadMode === SpreadMode.NONE) {\n      for (let i = 0, iMax = pages.length; i < iMax; ++i) {\n        viewer.appendChild(pages[i].div);\n      }\n    } else {\n      const parity = this._spreadMode - 1;\n      let spread = null;\n      for (let i = 0, iMax = pages.length; i < iMax; ++i) {\n        if (spread === null) {\n          spread = document.createElement(\"div\");\n          spread.className = \"spread\";\n          viewer.appendChild(spread);\n        } else if (i % 2 === parity) {\n          spread = spread.cloneNode(false);\n          viewer.appendChild(spread);\n        }\n        spread.appendChild(pages[i].div);\n      }\n    }\n\n    if (!pageNumber) {\n      return;\n    }\n    this._setCurrentPageNumber(pageNumber, /* resetCurrentPageView = */ true);\n    this.update();\n  }\n}\n\nexport { BaseViewer };\n","/* Copyright 2014 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { BaseViewer } from \"./base_viewer.js\";\nimport { shadow } from \"pdfjs-lib\";\n\nclass PDFViewer extends BaseViewer {\n  get _viewerElement() {\n    return shadow(this, \"_viewerElement\", this.viewer);\n  }\n\n  _scrollIntoView({ pageDiv, pageSpot = null, pageNumber = null }) {\n    if (!pageSpot && !this.isInPresentationMode) {\n      const left = pageDiv.offsetLeft + pageDiv.clientLeft;\n      const right = left + pageDiv.clientWidth;\n      const { scrollLeft, clientWidth } = this.container;\n      if (\n        this._isScrollModeHorizontal ||\n        left < scrollLeft ||\n        right > scrollLeft + clientWidth\n      ) {\n        pageSpot = { left: 0, top: 0 };\n      }\n    }\n    super._scrollIntoView({ pageDiv, pageSpot, pageNumber });\n  }\n\n  _getVisiblePages() {\n    if (this.isInPresentationMode) {\n      // The algorithm in `getVisibleElements` doesn't work in all browsers and\n      // configurations (e.g. Chrome) when Presentation Mode is active.\n      return this._getCurrentVisiblePage();\n    }\n    return super._getVisiblePages();\n  }\n\n  _updateHelper(visiblePages) {\n    if (this.isInPresentationMode) {\n      return;\n    }\n    let currentId = this._currentPageNumber;\n    let stillFullyVisible = false;\n\n    for (const page of visiblePages) {\n      if (page.percent < 100) {\n        break;\n      }\n      if (page.id === currentId) {\n        stillFullyVisible = true;\n        break;\n      }\n    }\n    if (!stillFullyVisible) {\n      currentId = visiblePages[0].id;\n    }\n    this._setCurrentPageNumber(currentId);\n  }\n}\n\nexport { PDFViewer };\n","import { Subscriber } from '../Subscriber';\nimport { Subject } from '../Subject';\nexport function windowCount(windowSize, startWindowEvery = 0) {\n    return function windowCountOperatorFunction(source) {\n        return source.lift(new WindowCountOperator(windowSize, startWindowEvery));\n    };\n}\nclass WindowCountOperator {\n    constructor(windowSize, startWindowEvery) {\n        this.windowSize = windowSize;\n        this.startWindowEvery = startWindowEvery;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new WindowCountSubscriber(subscriber, this.windowSize, this.startWindowEvery));\n    }\n}\nclass WindowCountSubscriber extends Subscriber {\n    constructor(destination, windowSize, startWindowEvery) {\n        super(destination);\n        this.destination = destination;\n        this.windowSize = windowSize;\n        this.startWindowEvery = startWindowEvery;\n        this.windows = [new Subject()];\n        this.count = 0;\n        destination.next(this.windows[0]);\n    }\n    _next(value) {\n        const startWindowEvery = (this.startWindowEvery > 0) ? this.startWindowEvery : this.windowSize;\n        const destination = this.destination;\n        const windowSize = this.windowSize;\n        const windows = this.windows;\n        const len = windows.length;\n        for (let i = 0; i < len && !this.closed; i++) {\n            windows[i].next(value);\n        }\n        const c = this.count - windowSize + 1;\n        if (c >= 0 && c % startWindowEvery === 0 && !this.closed) {\n            windows.shift().complete();\n        }\n        if (++this.count % startWindowEvery === 0 && !this.closed) {\n            const window = new Subject();\n            windows.push(window);\n            destination.next(window);\n        }\n    }\n    _error(err) {\n        const windows = this.windows;\n        if (windows) {\n            while (windows.length > 0 && !this.closed) {\n                windows.shift().error(err);\n            }\n        }\n        this.destination.error(err);\n    }\n    _complete() {\n        const windows = this.windows;\n        if (windows) {\n            while (windows.length > 0 && !this.closed) {\n                windows.shift().complete();\n            }\n        }\n        this.destination.complete();\n    }\n    _unsubscribe() {\n        this.count = 0;\n        this.windows = null;\n    }\n}\n//# sourceMappingURL=windowCount.js.map","/**\n * Copyright (c) 2014-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\nvar runtime = (function (exports) {\n  \"use strict\";\n\n  var Op = Object.prototype;\n  var hasOwn = Op.hasOwnProperty;\n  var undefined; // More compressible than void 0.\n  var $Symbol = typeof Symbol === \"function\" ? Symbol : {};\n  var iteratorSymbol = $Symbol.iterator || \"@@iterator\";\n  var asyncIteratorSymbol = $Symbol.asyncIterator || \"@@asyncIterator\";\n  var toStringTagSymbol = $Symbol.toStringTag || \"@@toStringTag\";\n\n  function define(obj, key, value) {\n    Object.defineProperty(obj, key, {\n      value: value,\n      enumerable: true,\n      configurable: true,\n      writable: true\n    });\n    return obj[key];\n  }\n  try {\n    // IE 8 has a broken Object.defineProperty that only works on DOM objects.\n    define({}, \"\");\n  } catch (err) {\n    define = function(obj, key, value) {\n      return obj[key] = value;\n    };\n  }\n\n  function wrap(innerFn, outerFn, self, tryLocsList) {\n    // If outerFn provided and outerFn.prototype is a Generator, then outerFn.prototype instanceof Generator.\n    var protoGenerator = outerFn && outerFn.prototype instanceof Generator ? outerFn : Generator;\n    var generator = Object.create(protoGenerator.prototype);\n    var context = new Context(tryLocsList || []);\n\n    // The ._invoke method unifies the implementations of the .next,\n    // .throw, and .return methods.\n    generator._invoke = makeInvokeMethod(innerFn, self, context);\n\n    return generator;\n  }\n  exports.wrap = wrap;\n\n  // Try/catch helper to minimize deoptimizations. Returns a completion\n  // record like context.tryEntries[i].completion. This interface could\n  // have been (and was previously) designed to take a closure to be\n  // invoked without arguments, but in all the cases we care about we\n  // already have an existing method we want to call, so there's no need\n  // to create a new function object. We can even get away with assuming\n  // the method takes exactly one argument, since that happens to be true\n  // in every case, so we don't have to touch the arguments object. The\n  // only additional allocation required is the completion record, which\n  // has a stable shape and so hopefully should be cheap to allocate.\n  function tryCatch(fn, obj, arg) {\n    try {\n      return { type: \"normal\", arg: fn.call(obj, arg) };\n    } catch (err) {\n      return { type: \"throw\", arg: err };\n    }\n  }\n\n  var GenStateSuspendedStart = \"suspendedStart\";\n  var GenStateSuspendedYield = \"suspendedYield\";\n  var GenStateExecuting = \"executing\";\n  var GenStateCompleted = \"completed\";\n\n  // Returning this object from the innerFn has the same effect as\n  // breaking out of the dispatch switch statement.\n  var ContinueSentinel = {};\n\n  // Dummy constructor functions that we use as the .constructor and\n  // .constructor.prototype properties for functions that return Generator\n  // objects. For full spec compliance, you may wish to configure your\n  // minifier not to mangle the names of these two functions.\n  function Generator() {}\n  function GeneratorFunction() {}\n  function GeneratorFunctionPrototype() {}\n\n  // This is a polyfill for %IteratorPrototype% for environments that\n  // don't natively support it.\n  var IteratorPrototype = {};\n  IteratorPrototype[iteratorSymbol] = function () {\n    return this;\n  };\n\n  var getProto = Object.getPrototypeOf;\n  var NativeIteratorPrototype = getProto && getProto(getProto(values([])));\n  if (NativeIteratorPrototype &&\n      NativeIteratorPrototype !== Op &&\n      hasOwn.call(NativeIteratorPrototype, iteratorSymbol)) {\n    // This environment has a native %IteratorPrototype%; use it instead\n    // of the polyfill.\n    IteratorPrototype = NativeIteratorPrototype;\n  }\n\n  var Gp = GeneratorFunctionPrototype.prototype =\n    Generator.prototype = Object.create(IteratorPrototype);\n  GeneratorFunction.prototype = Gp.constructor = GeneratorFunctionPrototype;\n  GeneratorFunctionPrototype.constructor = GeneratorFunction;\n  GeneratorFunction.displayName = define(\n    GeneratorFunctionPrototype,\n    toStringTagSymbol,\n    \"GeneratorFunction\"\n  );\n\n  // Helper for defining the .next, .throw, and .return methods of the\n  // Iterator interface in terms of a single ._invoke method.\n  function defineIteratorMethods(prototype) {\n    [\"next\", \"throw\", \"return\"].forEach(function(method) {\n      define(prototype, method, function(arg) {\n        return this._invoke(method, arg);\n      });\n    });\n  }\n\n  exports.isGeneratorFunction = function(genFun) {\n    var ctor = typeof genFun === \"function\" && genFun.constructor;\n    return ctor\n      ? ctor === GeneratorFunction ||\n        // For the native GeneratorFunction constructor, the best we can\n        // do is to check its .name property.\n        (ctor.displayName || ctor.name) === \"GeneratorFunction\"\n      : false;\n  };\n\n  exports.mark = function(genFun) {\n    if (Object.setPrototypeOf) {\n      Object.setPrototypeOf(genFun, GeneratorFunctionPrototype);\n    } else {\n      genFun.__proto__ = GeneratorFunctionPrototype;\n      define(genFun, toStringTagSymbol, \"GeneratorFunction\");\n    }\n    genFun.prototype = Object.create(Gp);\n    return genFun;\n  };\n\n  // Within the body of any async function, `await x` is transformed to\n  // `yield regeneratorRuntime.awrap(x)`, so that the runtime can test\n  // `hasOwn.call(value, \"__await\")` to determine if the yielded value is\n  // meant to be awaited.\n  exports.awrap = function(arg) {\n    return { __await: arg };\n  };\n\n  function AsyncIterator(generator, PromiseImpl) {\n    function invoke(method, arg, resolve, reject) {\n      var record = tryCatch(generator[method], generator, arg);\n      if (record.type === \"throw\") {\n        reject(record.arg);\n      } else {\n        var result = record.arg;\n        var value = result.value;\n        if (value &&\n            typeof value === \"object\" &&\n            hasOwn.call(value, \"__await\")) {\n          return PromiseImpl.resolve(value.__await).then(function(value) {\n            invoke(\"next\", value, resolve, reject);\n          }, function(err) {\n            invoke(\"throw\", err, resolve, reject);\n          });\n        }\n\n        return PromiseImpl.resolve(value).then(function(unwrapped) {\n          // When a yielded Promise is resolved, its final value becomes\n          // the .value of the Promise<{value,done}> result for the\n          // current iteration.\n          result.value = unwrapped;\n          resolve(result);\n        }, function(error) {\n          // If a rejected Promise was yielded, throw the rejection back\n          // into the async generator function so it can be handled there.\n          return invoke(\"throw\", error, resolve, reject);\n        });\n      }\n    }\n\n    var previousPromise;\n\n    function enqueue(method, arg) {\n      function callInvokeWithMethodAndArg() {\n        return new PromiseImpl(function(resolve, reject) {\n          invoke(method, arg, resolve, reject);\n        });\n      }\n\n      return previousPromise =\n        // If enqueue has been called before, then we want to wait until\n        // all previous Promises have been resolved before calling invoke,\n        // so that results are always delivered in the correct order. If\n        // enqueue has not been called before, then it is important to\n        // call invoke immediately, without waiting on a callback to fire,\n        // so that the async generator function has the opportunity to do\n        // any necessary setup in a predictable way. This predictability\n        // is why the Promise constructor synchronously invokes its\n        // executor callback, and why async functions synchronously\n        // execute code before the first await. Since we implement simple\n        // async functions in terms of async generators, it is especially\n        // important to get this right, even though it requires care.\n        previousPromise ? previousPromise.then(\n          callInvokeWithMethodAndArg,\n          // Avoid propagating failures to Promises returned by later\n          // invocations of the iterator.\n          callInvokeWithMethodAndArg\n        ) : callInvokeWithMethodAndArg();\n    }\n\n    // Define the unified helper method that is used to implement .next,\n    // .throw, and .return (see defineIteratorMethods).\n    this._invoke = enqueue;\n  }\n\n  defineIteratorMethods(AsyncIterator.prototype);\n  AsyncIterator.prototype[asyncIteratorSymbol] = function () {\n    return this;\n  };\n  exports.AsyncIterator = AsyncIterator;\n\n  // Note that simple async functions are implemented on top of\n  // AsyncIterator objects; they just return a Promise for the value of\n  // the final result produced by the iterator.\n  exports.async = function(innerFn, outerFn, self, tryLocsList, PromiseImpl) {\n    if (PromiseImpl === void 0) PromiseImpl = Promise;\n\n    var iter = new AsyncIterator(\n      wrap(innerFn, outerFn, self, tryLocsList),\n      PromiseImpl\n    );\n\n    return exports.isGeneratorFunction(outerFn)\n      ? iter // If outerFn is a generator, return the full iterator.\n      : iter.next().then(function(result) {\n          return result.done ? result.value : iter.next();\n        });\n  };\n\n  function makeInvokeMethod(innerFn, self, context) {\n    var state = GenStateSuspendedStart;\n\n    return function invoke(method, arg) {\n      if (state === GenStateExecuting) {\n        throw new Error(\"Generator is already running\");\n      }\n\n      if (state === GenStateCompleted) {\n        if (method === \"throw\") {\n          throw arg;\n        }\n\n        // Be forgiving, per 25.3.3.3.3 of the spec:\n        // https://people.mozilla.org/~jorendorff/es6-draft.html#sec-generatorresume\n        return doneResult();\n      }\n\n      context.method = method;\n      context.arg = arg;\n\n      while (true) {\n        var delegate = context.delegate;\n        if (delegate) {\n          var delegateResult = maybeInvokeDelegate(delegate, context);\n          if (delegateResult) {\n            if (delegateResult === ContinueSentinel) continue;\n            return delegateResult;\n          }\n        }\n\n        if (context.method === \"next\") {\n          // Setting context._sent for legacy support of Babel's\n          // function.sent implementation.\n          context.sent = context._sent = context.arg;\n\n        } else if (context.method === \"throw\") {\n          if (state === GenStateSuspendedStart) {\n            state = GenStateCompleted;\n            throw context.arg;\n          }\n\n          context.dispatchException(context.arg);\n\n        } else if (context.method === \"return\") {\n          context.abrupt(\"return\", context.arg);\n        }\n\n        state = GenStateExecuting;\n\n        var record = tryCatch(innerFn, self, context);\n        if (record.type === \"normal\") {\n          // If an exception is thrown from innerFn, we leave state ===\n          // GenStateExecuting and loop back for another invocation.\n          state = context.done\n            ? GenStateCompleted\n            : GenStateSuspendedYield;\n\n          if (record.arg === ContinueSentinel) {\n            continue;\n          }\n\n          return {\n            value: record.arg,\n            done: context.done\n          };\n\n        } else if (record.type === \"throw\") {\n          state = GenStateCompleted;\n          // Dispatch the exception by looping back around to the\n          // context.dispatchException(context.arg) call above.\n          context.method = \"throw\";\n          context.arg = record.arg;\n        }\n      }\n    };\n  }\n\n  // Call delegate.iterator[context.method](context.arg) and handle the\n  // result, either by returning a { value, done } result from the\n  // delegate iterator, or by modifying context.method and context.arg,\n  // setting context.delegate to null, and returning the ContinueSentinel.\n  function maybeInvokeDelegate(delegate, context) {\n    var method = delegate.iterator[context.method];\n    if (method === undefined) {\n      // A .throw or .return when the delegate iterator has no .throw\n      // method always terminates the yield* loop.\n      context.delegate = null;\n\n      if (context.method === \"throw\") {\n        // Note: [\"return\"] must be used for ES3 parsing compatibility.\n        if (delegate.iterator[\"return\"]) {\n          // If the delegate iterator has a return method, give it a\n          // chance to clean up.\n          context.method = \"return\";\n          context.arg = undefined;\n          maybeInvokeDelegate(delegate, context);\n\n          if (context.method === \"throw\") {\n            // If maybeInvokeDelegate(context) changed context.method from\n            // \"return\" to \"throw\", let that override the TypeError below.\n            return ContinueSentinel;\n          }\n        }\n\n        context.method = \"throw\";\n        context.arg = new TypeError(\n          \"The iterator does not provide a 'throw' method\");\n      }\n\n      return ContinueSentinel;\n    }\n\n    var record = tryCatch(method, delegate.iterator, context.arg);\n\n    if (record.type === \"throw\") {\n      context.method = \"throw\";\n      context.arg = record.arg;\n      context.delegate = null;\n      return ContinueSentinel;\n    }\n\n    var info = record.arg;\n\n    if (! info) {\n      context.method = \"throw\";\n      context.arg = new TypeError(\"iterator result is not an object\");\n      context.delegate = null;\n      return ContinueSentinel;\n    }\n\n    if (info.done) {\n      // Assign the result of the finished delegate to the temporary\n      // variable specified by delegate.resultName (see delegateYield).\n      context[delegate.resultName] = info.value;\n\n      // Resume execution at the desired location (see delegateYield).\n      context.next = delegate.nextLoc;\n\n      // If context.method was \"throw\" but the delegate handled the\n      // exception, let the outer generator proceed normally. If\n      // context.method was \"next\", forget context.arg since it has been\n      // \"consumed\" by the delegate iterator. If context.method was\n      // \"return\", allow the original .return call to continue in the\n      // outer generator.\n      if (context.method !== \"return\") {\n        context.method = \"next\";\n        context.arg = undefined;\n      }\n\n    } else {\n      // Re-yield the result returned by the delegate method.\n      return info;\n    }\n\n    // The delegate iterator is finished, so forget it and continue with\n    // the outer generator.\n    context.delegate = null;\n    return ContinueSentinel;\n  }\n\n  // Define Generator.prototype.{next,throw,return} in terms of the\n  // unified ._invoke helper method.\n  defineIteratorMethods(Gp);\n\n  define(Gp, toStringTagSymbol, \"Generator\");\n\n  // A Generator should always return itself as the iterator object when the\n  // @@iterator function is called on it. Some browsers' implementations of the\n  // iterator prototype chain incorrectly implement this, causing the Generator\n  // object to not be returned from this call. This ensures that doesn't happen.\n  // See https://github.com/facebook/regenerator/issues/274 for more details.\n  Gp[iteratorSymbol] = function() {\n    return this;\n  };\n\n  Gp.toString = function() {\n    return \"[object Generator]\";\n  };\n\n  function pushTryEntry(locs) {\n    var entry = { tryLoc: locs[0] };\n\n    if (1 in locs) {\n      entry.catchLoc = locs[1];\n    }\n\n    if (2 in locs) {\n      entry.finallyLoc = locs[2];\n      entry.afterLoc = locs[3];\n    }\n\n    this.tryEntries.push(entry);\n  }\n\n  function resetTryEntry(entry) {\n    var record = entry.completion || {};\n    record.type = \"normal\";\n    delete record.arg;\n    entry.completion = record;\n  }\n\n  function Context(tryLocsList) {\n    // The root entry object (effectively a try statement without a catch\n    // or a finally block) gives us a place to store values thrown from\n    // locations where there is no enclosing try statement.\n    this.tryEntries = [{ tryLoc: \"root\" }];\n    tryLocsList.forEach(pushTryEntry, this);\n    this.reset(true);\n  }\n\n  exports.keys = function(object) {\n    var keys = [];\n    for (var key in object) {\n      keys.push(key);\n    }\n    keys.reverse();\n\n    // Rather than returning an object with a next method, we keep\n    // things simple and return the next function itself.\n    return function next() {\n      while (keys.length) {\n        var key = keys.pop();\n        if (key in object) {\n          next.value = key;\n          next.done = false;\n          return next;\n        }\n      }\n\n      // To avoid creating an additional object, we just hang the .value\n      // and .done properties off the next function object itself. This\n      // also ensures that the minifier will not anonymize the function.\n      next.done = true;\n      return next;\n    };\n  };\n\n  function values(iterable) {\n    if (iterable) {\n      var iteratorMethod = iterable[iteratorSymbol];\n      if (iteratorMethod) {\n        return iteratorMethod.call(iterable);\n      }\n\n      if (typeof iterable.next === \"function\") {\n        return iterable;\n      }\n\n      if (!isNaN(iterable.length)) {\n        var i = -1, next = function next() {\n          while (++i < iterable.length) {\n            if (hasOwn.call(iterable, i)) {\n              next.value = iterable[i];\n              next.done = false;\n              return next;\n            }\n          }\n\n          next.value = undefined;\n          next.done = true;\n\n          return next;\n        };\n\n        return next.next = next;\n      }\n    }\n\n    // Return an iterator with no values.\n    return { next: doneResult };\n  }\n  exports.values = values;\n\n  function doneResult() {\n    return { value: undefined, done: true };\n  }\n\n  Context.prototype = {\n    constructor: Context,\n\n    reset: function(skipTempReset) {\n      this.prev = 0;\n      this.next = 0;\n      // Resetting context._sent for legacy support of Babel's\n      // function.sent implementation.\n      this.sent = this._sent = undefined;\n      this.done = false;\n      this.delegate = null;\n\n      this.method = \"next\";\n      this.arg = undefined;\n\n      this.tryEntries.forEach(resetTryEntry);\n\n      if (!skipTempReset) {\n        for (var name in this) {\n          // Not sure about the optimal order of these conditions:\n          if (name.charAt(0) === \"t\" &&\n              hasOwn.call(this, name) &&\n              !isNaN(+name.slice(1))) {\n            this[name] = undefined;\n          }\n        }\n      }\n    },\n\n    stop: function() {\n      this.done = true;\n\n      var rootEntry = this.tryEntries[0];\n      var rootRecord = rootEntry.completion;\n      if (rootRecord.type === \"throw\") {\n        throw rootRecord.arg;\n      }\n\n      return this.rval;\n    },\n\n    dispatchException: function(exception) {\n      if (this.done) {\n        throw exception;\n      }\n\n      var context = this;\n      function handle(loc, caught) {\n        record.type = \"throw\";\n        record.arg = exception;\n        context.next = loc;\n\n        if (caught) {\n          // If the dispatched exception was caught by a catch block,\n          // then let that catch block handle the exception normally.\n          context.method = \"next\";\n          context.arg = undefined;\n        }\n\n        return !! caught;\n      }\n\n      for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n        var entry = this.tryEntries[i];\n        var record = entry.completion;\n\n        if (entry.tryLoc === \"root\") {\n          // Exception thrown outside of any try block that could handle\n          // it, so set the completion value of the entire function to\n          // throw the exception.\n          return handle(\"end\");\n        }\n\n        if (entry.tryLoc <= this.prev) {\n          var hasCatch = hasOwn.call(entry, \"catchLoc\");\n          var hasFinally = hasOwn.call(entry, \"finallyLoc\");\n\n          if (hasCatch && hasFinally) {\n            if (this.prev < entry.catchLoc) {\n              return handle(entry.catchLoc, true);\n            } else if (this.prev < entry.finallyLoc) {\n              return handle(entry.finallyLoc);\n            }\n\n          } else if (hasCatch) {\n            if (this.prev < entry.catchLoc) {\n              return handle(entry.catchLoc, true);\n            }\n\n          } else if (hasFinally) {\n            if (this.prev < entry.finallyLoc) {\n              return handle(entry.finallyLoc);\n            }\n\n          } else {\n            throw new Error(\"try statement without catch or finally\");\n          }\n        }\n      }\n    },\n\n    abrupt: function(type, arg) {\n      for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n        var entry = this.tryEntries[i];\n        if (entry.tryLoc <= this.prev &&\n            hasOwn.call(entry, \"finallyLoc\") &&\n            this.prev < entry.finallyLoc) {\n          var finallyEntry = entry;\n          break;\n        }\n      }\n\n      if (finallyEntry &&\n          (type === \"break\" ||\n           type === \"continue\") &&\n          finallyEntry.tryLoc <= arg &&\n          arg <= finallyEntry.finallyLoc) {\n        // Ignore the finally entry if control is not jumping to a\n        // location outside the try/catch block.\n        finallyEntry = null;\n      }\n\n      var record = finallyEntry ? finallyEntry.completion : {};\n      record.type = type;\n      record.arg = arg;\n\n      if (finallyEntry) {\n        this.method = \"next\";\n        this.next = finallyEntry.finallyLoc;\n        return ContinueSentinel;\n      }\n\n      return this.complete(record);\n    },\n\n    complete: function(record, afterLoc) {\n      if (record.type === \"throw\") {\n        throw record.arg;\n      }\n\n      if (record.type === \"break\" ||\n          record.type === \"continue\") {\n        this.next = record.arg;\n      } else if (record.type === \"return\") {\n        this.rval = this.arg = record.arg;\n        this.method = \"return\";\n        this.next = \"end\";\n      } else if (record.type === \"normal\" && afterLoc) {\n        this.next = afterLoc;\n      }\n\n      return ContinueSentinel;\n    },\n\n    finish: function(finallyLoc) {\n      for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n        var entry = this.tryEntries[i];\n        if (entry.finallyLoc === finallyLoc) {\n          this.complete(entry.completion, entry.afterLoc);\n          resetTryEntry(entry);\n          return ContinueSentinel;\n        }\n      }\n    },\n\n    \"catch\": function(tryLoc) {\n      for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n        var entry = this.tryEntries[i];\n        if (entry.tryLoc === tryLoc) {\n          var record = entry.completion;\n          if (record.type === \"throw\") {\n            var thrown = record.arg;\n            resetTryEntry(entry);\n          }\n          return thrown;\n        }\n      }\n\n      // The context.catch method must only be called with a location\n      // argument that corresponds to a known catch block.\n      throw new Error(\"illegal catch attempt\");\n    },\n\n    delegateYield: function(iterable, resultName, nextLoc) {\n      this.delegate = {\n        iterator: values(iterable),\n        resultName: resultName,\n        nextLoc: nextLoc\n      };\n\n      if (this.method === \"next\") {\n        // Deliberately forget the last sent value so that we don't\n        // accidentally pass it on to the delegate.\n        this.arg = undefined;\n      }\n\n      return ContinueSentinel;\n    }\n  };\n\n  // Regardless of whether this script is executing as a CommonJS module\n  // or not, return the runtime object so that we can declare the variable\n  // regeneratorRuntime in the outer scope, which allows this module to be\n  // injected easily by `bin/regenerator --include-runtime script.js`.\n  return exports;\n\n}(\n  // If this script is executing as a CommonJS module, use module.exports\n  // as the regeneratorRuntime namespace. Otherwise create a new empty\n  // object. Either way, the resulting object will be used to initialize\n  // the regeneratorRuntime variable at the top of this file.\n  typeof module === \"object\" ? module.exports : {}\n));\n\ntry {\n  regeneratorRuntime = runtime;\n} catch (accidentalStrictMode) {\n  // This module should not be running in strict mode, so the above\n  // assignment should always work unless something is misconfigured. Just\n  // in case runtime.js accidentally runs in strict mode, we can escape\n  // strict mode using a global Function call. This could conceivably fail\n  // if a Content Security Policy forbids using Function, but in that case\n  // the proper solution is to fix the accidental strict mode problem. If\n  // you've misconfigured your bundler to force strict mode and applied a\n  // CSP to forbid Function, and you're not willing to fix either of those\n  // problems, please detail your unique predicament in a GitHub issue.\n  Function(\"r\", \"regeneratorRuntime = r\")(runtime);\n}\n","function _classCallCheck(instance, Constructor) {\n  if (!(instance instanceof Constructor)) {\n    throw new TypeError(\"Cannot call a class as a function\");\n  }\n}\n\nmodule.exports = _classCallCheck;","/**\n* @license Angular v10.1.0-next.6+7.sha-aaa1d8e\n* (c) 2010-2020 Google LLC. https://angular.io/\n* License: MIT\n*/\n(function (factory) {\n    typeof define === 'function' && define.amd ? define(factory) :\n    factory();\n}((function () { 'use strict';\n\n    /**\n     * @license\n     * Copyright Google LLC All Rights Reserved.\n     *\n     * Use of this source code is governed by an MIT-style license that can be\n     * found in the LICENSE file at https://angular.io/license\n     */\n    const Zone$1 = (function (global) {\n        const performance = global['performance'];\n        function mark(name) {\n            performance && performance['mark'] && performance['mark'](name);\n        }\n        function performanceMeasure(name, label) {\n            performance && performance['measure'] && performance['measure'](name, label);\n        }\n        mark('Zone');\n        // Initialize before it's accessed below.\n        // __Zone_symbol_prefix global can be used to override the default zone\n        // symbol prefix with a custom one if needed.\n        const symbolPrefix = global['__Zone_symbol_prefix'] || '__zone_symbol__';\n        function __symbol__(name) {\n            return symbolPrefix + name;\n        }\n        const checkDuplicate = global[__symbol__('forceDuplicateZoneCheck')] === true;\n        if (global['Zone']) {\n            // if global['Zone'] already exists (maybe zone.js was already loaded or\n            // some other lib also registered a global object named Zone), we may need\n            // to throw an error, but sometimes user may not want this error.\n            // For example,\n            // we have two web pages, page1 includes zone.js, page2 doesn't.\n            // and the 1st time user load page1 and page2, everything work fine,\n            // but when user load page2 again, error occurs because global['Zone'] already exists.\n            // so we add a flag to let user choose whether to throw this error or not.\n            // By default, if existing Zone is from zone.js, we will not throw the error.\n            if (checkDuplicate || typeof global['Zone'].__symbol__ !== 'function') {\n                throw new Error('Zone already loaded.');\n            }\n            else {\n                return global['Zone'];\n            }\n        }\n        class Zone {\n            constructor(parent, zoneSpec) {\n                this._parent = parent;\n                this._name = zoneSpec ? zoneSpec.name || 'unnamed' : '<root>';\n                this._properties = zoneSpec && zoneSpec.properties || {};\n                this._zoneDelegate =\n                    new ZoneDelegate(this, this._parent && this._parent._zoneDelegate, zoneSpec);\n            }\n            static assertZonePatched() {\n                if (global['Promise'] !== patches['ZoneAwarePromise']) {\n                    throw new Error('Zone.js has detected that ZoneAwarePromise `(window|global).Promise` ' +\n                        'has been overwritten.\\n' +\n                        'Most likely cause is that a Promise polyfill has been loaded ' +\n                        'after Zone.js (Polyfilling Promise api is not necessary when zone.js is loaded. ' +\n                        'If you must load one, do so before loading zone.js.)');\n                }\n            }\n            static get root() {\n                let zone = Zone.current;\n                while (zone.parent) {\n                    zone = zone.parent;\n                }\n                return zone;\n            }\n            static get current() {\n                return _currentZoneFrame.zone;\n            }\n            static get currentTask() {\n                return _currentTask;\n            }\n            // tslint:disable-next-line:require-internal-with-underscore\n            static __load_patch(name, fn) {\n                if (patches.hasOwnProperty(name)) {\n                    if (checkDuplicate) {\n                        throw Error('Already loaded patch: ' + name);\n                    }\n                }\n                else if (!global['__Zone_disable_' + name]) {\n                    const perfName = 'Zone:' + name;\n                    mark(perfName);\n                    patches[name] = fn(global, Zone, _api);\n                    performanceMeasure(perfName, perfName);\n                }\n            }\n            get parent() {\n                return this._parent;\n            }\n            get name() {\n                return this._name;\n            }\n            get(key) {\n                const zone = this.getZoneWith(key);\n                if (zone)\n                    return zone._properties[key];\n            }\n            getZoneWith(key) {\n                let current = this;\n                while (current) {\n                    if (current._properties.hasOwnProperty(key)) {\n                        return current;\n                    }\n                    current = current._parent;\n                }\n                return null;\n            }\n            fork(zoneSpec) {\n                if (!zoneSpec)\n                    throw new Error('ZoneSpec required!');\n                return this._zoneDelegate.fork(this, zoneSpec);\n            }\n            wrap(callback, source) {\n                if (typeof callback !== 'function') {\n                    throw new Error('Expecting function got: ' + callback);\n                }\n                const _callback = this._zoneDelegate.intercept(this, callback, source);\n                const zone = this;\n                return function () {\n                    return zone.runGuarded(_callback, this, arguments, source);\n                };\n            }\n            run(callback, applyThis, applyArgs, source) {\n                _currentZoneFrame = { parent: _currentZoneFrame, zone: this };\n                try {\n                    return this._zoneDelegate.invoke(this, callback, applyThis, applyArgs, source);\n                }\n                finally {\n                    _currentZoneFrame = _currentZoneFrame.parent;\n                }\n            }\n            runGuarded(callback, applyThis = null, applyArgs, source) {\n                _currentZoneFrame = { parent: _currentZoneFrame, zone: this };\n                try {\n                    try {\n                        return this._zoneDelegate.invoke(this, callback, applyThis, applyArgs, source);\n                    }\n                    catch (error) {\n                        if (this._zoneDelegate.handleError(this, error)) {\n                            throw error;\n                        }\n                    }\n                }\n                finally {\n                    _currentZoneFrame = _currentZoneFrame.parent;\n                }\n            }\n            runTask(task, applyThis, applyArgs) {\n                if (task.zone != this) {\n                    throw new Error('A task can only be run in the zone of creation! (Creation: ' +\n                        (task.zone || NO_ZONE).name + '; Execution: ' + this.name + ')');\n                }\n                // https://github.com/angular/zone.js/issues/778, sometimes eventTask\n                // will run in notScheduled(canceled) state, we should not try to\n                // run such kind of task but just return\n                if (task.state === notScheduled && (task.type === eventTask || task.type === macroTask)) {\n                    return;\n                }\n                const reEntryGuard = task.state != running;\n                reEntryGuard && task._transitionTo(running, scheduled);\n                task.runCount++;\n                const previousTask = _currentTask;\n                _currentTask = task;\n                _currentZoneFrame = { parent: _currentZoneFrame, zone: this };\n                try {\n                    if (task.type == macroTask && task.data && !task.data.isPeriodic) {\n                        task.cancelFn = undefined;\n                    }\n                    try {\n                        return this._zoneDelegate.invokeTask(this, task, applyThis, applyArgs);\n                    }\n                    catch (error) {\n                        if (this._zoneDelegate.handleError(this, error)) {\n                            throw error;\n                        }\n                    }\n                }\n                finally {\n                    // if the task's state is notScheduled or unknown, then it has already been cancelled\n                    // we should not reset the state to scheduled\n                    if (task.state !== notScheduled && task.state !== unknown) {\n                        if (task.type == eventTask || (task.data && task.data.isPeriodic)) {\n                            reEntryGuard && task._transitionTo(scheduled, running);\n                        }\n                        else {\n                            task.runCount = 0;\n                            this._updateTaskCount(task, -1);\n                            reEntryGuard &&\n                                task._transitionTo(notScheduled, running, notScheduled);\n                        }\n                    }\n                    _currentZoneFrame = _currentZoneFrame.parent;\n                    _currentTask = previousTask;\n                }\n            }\n            scheduleTask(task) {\n                if (task.zone && task.zone !== this) {\n                    // check if the task was rescheduled, the newZone\n                    // should not be the children of the original zone\n                    let newZone = this;\n                    while (newZone) {\n                        if (newZone === task.zone) {\n                            throw Error(`can not reschedule task to ${this.name} which is descendants of the original zone ${task.zone.name}`);\n                        }\n                        newZone = newZone.parent;\n                    }\n                }\n                task._transitionTo(scheduling, notScheduled);\n                const zoneDelegates = [];\n                task._zoneDelegates = zoneDelegates;\n                task._zone = this;\n                try {\n                    task = this._zoneDelegate.scheduleTask(this, task);\n                }\n                catch (err) {\n                    // should set task's state to unknown when scheduleTask throw error\n                    // because the err may from reschedule, so the fromState maybe notScheduled\n                    task._transitionTo(unknown, scheduling, notScheduled);\n                    // TODO: @JiaLiPassion, should we check the result from handleError?\n                    this._zoneDelegate.handleError(this, err);\n                    throw err;\n                }\n                if (task._zoneDelegates === zoneDelegates) {\n                    // we have to check because internally the delegate can reschedule the task.\n                    this._updateTaskCount(task, 1);\n                }\n                if (task.state == scheduling) {\n                    task._transitionTo(scheduled, scheduling);\n                }\n                return task;\n            }\n            scheduleMicroTask(source, callback, data, customSchedule) {\n                return this.scheduleTask(new ZoneTask(microTask, source, callback, data, customSchedule, undefined));\n            }\n            scheduleMacroTask(source, callback, data, customSchedule, customCancel) {\n                return this.scheduleTask(new ZoneTask(macroTask, source, callback, data, customSchedule, customCancel));\n            }\n            scheduleEventTask(source, callback, data, customSchedule, customCancel) {\n                return this.scheduleTask(new ZoneTask(eventTask, source, callback, data, customSchedule, customCancel));\n            }\n            cancelTask(task) {\n                if (task.zone != this)\n                    throw new Error('A task can only be cancelled in the zone of creation! (Creation: ' +\n                        (task.zone || NO_ZONE).name + '; Execution: ' + this.name + ')');\n                task._transitionTo(canceling, scheduled, running);\n                try {\n                    this._zoneDelegate.cancelTask(this, task);\n                }\n                catch (err) {\n                    // if error occurs when cancelTask, transit the state to unknown\n                    task._transitionTo(unknown, canceling);\n                    this._zoneDelegate.handleError(this, err);\n                    throw err;\n                }\n                this._updateTaskCount(task, -1);\n                task._transitionTo(notScheduled, canceling);\n                task.runCount = 0;\n                return task;\n            }\n            _updateTaskCount(task, count) {\n                const zoneDelegates = task._zoneDelegates;\n                if (count == -1) {\n                    task._zoneDelegates = null;\n                }\n                for (let i = 0; i < zoneDelegates.length; i++) {\n                    zoneDelegates[i]._updateTaskCount(task.type, count);\n                }\n            }\n        }\n        // tslint:disable-next-line:require-internal-with-underscore\n        Zone.__symbol__ = __symbol__;\n        const DELEGATE_ZS = {\n            name: '',\n            onHasTask: (delegate, _, target, hasTaskState) => delegate.hasTask(target, hasTaskState),\n            onScheduleTask: (delegate, _, target, task) => delegate.scheduleTask(target, task),\n            onInvokeTask: (delegate, _, target, task, applyThis, applyArgs) => delegate.invokeTask(target, task, applyThis, applyArgs),\n            onCancelTask: (delegate, _, target, task) => delegate.cancelTask(target, task)\n        };\n        class ZoneDelegate {\n            constructor(zone, parentDelegate, zoneSpec) {\n                this._taskCounts = { 'microTask': 0, 'macroTask': 0, 'eventTask': 0 };\n                this.zone = zone;\n                this._parentDelegate = parentDelegate;\n                this._forkZS = zoneSpec && (zoneSpec && zoneSpec.onFork ? zoneSpec : parentDelegate._forkZS);\n                this._forkDlgt = zoneSpec && (zoneSpec.onFork ? parentDelegate : parentDelegate._forkDlgt);\n                this._forkCurrZone =\n                    zoneSpec && (zoneSpec.onFork ? this.zone : parentDelegate._forkCurrZone);\n                this._interceptZS =\n                    zoneSpec && (zoneSpec.onIntercept ? zoneSpec : parentDelegate._interceptZS);\n                this._interceptDlgt =\n                    zoneSpec && (zoneSpec.onIntercept ? parentDelegate : parentDelegate._interceptDlgt);\n                this._interceptCurrZone =\n                    zoneSpec && (zoneSpec.onIntercept ? this.zone : parentDelegate._interceptCurrZone);\n                this._invokeZS = zoneSpec && (zoneSpec.onInvoke ? zoneSpec : parentDelegate._invokeZS);\n                this._invokeDlgt =\n                    zoneSpec && (zoneSpec.onInvoke ? parentDelegate : parentDelegate._invokeDlgt);\n                this._invokeCurrZone =\n                    zoneSpec && (zoneSpec.onInvoke ? this.zone : parentDelegate._invokeCurrZone);\n                this._handleErrorZS =\n                    zoneSpec && (zoneSpec.onHandleError ? zoneSpec : parentDelegate._handleErrorZS);\n                this._handleErrorDlgt =\n                    zoneSpec && (zoneSpec.onHandleError ? parentDelegate : parentDelegate._handleErrorDlgt);\n                this._handleErrorCurrZone =\n                    zoneSpec && (zoneSpec.onHandleError ? this.zone : parentDelegate._handleErrorCurrZone);\n                this._scheduleTaskZS =\n                    zoneSpec && (zoneSpec.onScheduleTask ? zoneSpec : parentDelegate._scheduleTaskZS);\n                this._scheduleTaskDlgt = zoneSpec &&\n                    (zoneSpec.onScheduleTask ? parentDelegate : parentDelegate._scheduleTaskDlgt);\n                this._scheduleTaskCurrZone =\n                    zoneSpec && (zoneSpec.onScheduleTask ? this.zone : parentDelegate._scheduleTaskCurrZone);\n                this._invokeTaskZS =\n                    zoneSpec && (zoneSpec.onInvokeTask ? zoneSpec : parentDelegate._invokeTaskZS);\n                this._invokeTaskDlgt =\n                    zoneSpec && (zoneSpec.onInvokeTask ? parentDelegate : parentDelegate._invokeTaskDlgt);\n                this._invokeTaskCurrZone =\n                    zoneSpec && (zoneSpec.onInvokeTask ? this.zone : parentDelegate._invokeTaskCurrZone);\n                this._cancelTaskZS =\n                    zoneSpec && (zoneSpec.onCancelTask ? zoneSpec : parentDelegate._cancelTaskZS);\n                this._cancelTaskDlgt =\n                    zoneSpec && (zoneSpec.onCancelTask ? parentDelegate : parentDelegate._cancelTaskDlgt);\n                this._cancelTaskCurrZone =\n                    zoneSpec && (zoneSpec.onCancelTask ? this.zone : parentDelegate._cancelTaskCurrZone);\n                this._hasTaskZS = null;\n                this._hasTaskDlgt = null;\n                this._hasTaskDlgtOwner = null;\n                this._hasTaskCurrZone = null;\n                const zoneSpecHasTask = zoneSpec && zoneSpec.onHasTask;\n                const parentHasTask = parentDelegate && parentDelegate._hasTaskZS;\n                if (zoneSpecHasTask || parentHasTask) {\n                    // If we need to report hasTask, than this ZS needs to do ref counting on tasks. In such\n                    // a case all task related interceptors must go through this ZD. We can't short circuit it.\n                    this._hasTaskZS = zoneSpecHasTask ? zoneSpec : DELEGATE_ZS;\n                    this._hasTaskDlgt = parentDelegate;\n                    this._hasTaskDlgtOwner = this;\n                    this._hasTaskCurrZone = zone;\n                    if (!zoneSpec.onScheduleTask) {\n                        this._scheduleTaskZS = DELEGATE_ZS;\n                        this._scheduleTaskDlgt = parentDelegate;\n                        this._scheduleTaskCurrZone = this.zone;\n                    }\n                    if (!zoneSpec.onInvokeTask) {\n                        this._invokeTaskZS = DELEGATE_ZS;\n                        this._invokeTaskDlgt = parentDelegate;\n                        this._invokeTaskCurrZone = this.zone;\n                    }\n                    if (!zoneSpec.onCancelTask) {\n                        this._cancelTaskZS = DELEGATE_ZS;\n                        this._cancelTaskDlgt = parentDelegate;\n                        this._cancelTaskCurrZone = this.zone;\n                    }\n                }\n            }\n            fork(targetZone, zoneSpec) {\n                return this._forkZS ? this._forkZS.onFork(this._forkDlgt, this.zone, targetZone, zoneSpec) :\n                    new Zone(targetZone, zoneSpec);\n            }\n            intercept(targetZone, callback, source) {\n                return this._interceptZS ?\n                    this._interceptZS.onIntercept(this._interceptDlgt, this._interceptCurrZone, targetZone, callback, source) :\n                    callback;\n            }\n            invoke(targetZone, callback, applyThis, applyArgs, source) {\n                return this._invokeZS ? this._invokeZS.onInvoke(this._invokeDlgt, this._invokeCurrZone, targetZone, callback, applyThis, applyArgs, source) :\n                    callback.apply(applyThis, applyArgs);\n            }\n            handleError(targetZone, error) {\n                return this._handleErrorZS ?\n                    this._handleErrorZS.onHandleError(this._handleErrorDlgt, this._handleErrorCurrZone, targetZone, error) :\n                    true;\n            }\n            scheduleTask(targetZone, task) {\n                let returnTask = task;\n                if (this._scheduleTaskZS) {\n                    if (this._hasTaskZS) {\n                        returnTask._zoneDelegates.push(this._hasTaskDlgtOwner);\n                    }\n                    // clang-format off\n                    returnTask = this._scheduleTaskZS.onScheduleTask(this._scheduleTaskDlgt, this._scheduleTaskCurrZone, targetZone, task);\n                    // clang-format on\n                    if (!returnTask)\n                        returnTask = task;\n                }\n                else {\n                    if (task.scheduleFn) {\n                        task.scheduleFn(task);\n                    }\n                    else if (task.type == microTask) {\n                        scheduleMicroTask(task);\n                    }\n                    else {\n                        throw new Error('Task is missing scheduleFn.');\n                    }\n                }\n                return returnTask;\n            }\n            invokeTask(targetZone, task, applyThis, applyArgs) {\n                return this._invokeTaskZS ? this._invokeTaskZS.onInvokeTask(this._invokeTaskDlgt, this._invokeTaskCurrZone, targetZone, task, applyThis, applyArgs) :\n                    task.callback.apply(applyThis, applyArgs);\n            }\n            cancelTask(targetZone, task) {\n                let value;\n                if (this._cancelTaskZS) {\n                    value = this._cancelTaskZS.onCancelTask(this._cancelTaskDlgt, this._cancelTaskCurrZone, targetZone, task);\n                }\n                else {\n                    if (!task.cancelFn) {\n                        throw Error('Task is not cancelable');\n                    }\n                    value = task.cancelFn(task);\n                }\n                return value;\n            }\n            hasTask(targetZone, isEmpty) {\n                // hasTask should not throw error so other ZoneDelegate\n                // can still trigger hasTask callback\n                try {\n                    this._hasTaskZS &&\n                        this._hasTaskZS.onHasTask(this._hasTaskDlgt, this._hasTaskCurrZone, targetZone, isEmpty);\n                }\n                catch (err) {\n                    this.handleError(targetZone, err);\n                }\n            }\n            // tslint:disable-next-line:require-internal-with-underscore\n            _updateTaskCount(type, count) {\n                const counts = this._taskCounts;\n                const prev = counts[type];\n                const next = counts[type] = prev + count;\n                if (next < 0) {\n                    throw new Error('More tasks executed then were scheduled.');\n                }\n                if (prev == 0 || next == 0) {\n                    const isEmpty = {\n                        microTask: counts['microTask'] > 0,\n                        macroTask: counts['macroTask'] > 0,\n                        eventTask: counts['eventTask'] > 0,\n                        change: type\n                    };\n                    this.hasTask(this.zone, isEmpty);\n                }\n            }\n        }\n        class ZoneTask {\n            constructor(type, source, callback, options, scheduleFn, cancelFn) {\n                // tslint:disable-next-line:require-internal-with-underscore\n                this._zone = null;\n                this.runCount = 0;\n                // tslint:disable-next-line:require-internal-with-underscore\n                this._zoneDelegates = null;\n                // tslint:disable-next-line:require-internal-with-underscore\n                this._state = 'notScheduled';\n                this.type = type;\n                this.source = source;\n                this.data = options;\n                this.scheduleFn = scheduleFn;\n                this.cancelFn = cancelFn;\n                if (!callback) {\n                    throw new Error('callback is not defined');\n                }\n                this.callback = callback;\n                const self = this;\n                // TODO: @JiaLiPassion options should have interface\n                if (type === eventTask && options && options.useG) {\n                    this.invoke = ZoneTask.invokeTask;\n                }\n                else {\n                    this.invoke = function () {\n                        return ZoneTask.invokeTask.call(global, self, this, arguments);\n                    };\n                }\n            }\n            static invokeTask(task, target, args) {\n                if (!task) {\n                    task = this;\n                }\n                _numberOfNestedTaskFrames++;\n                try {\n                    task.runCount++;\n                    return task.zone.runTask(task, target, args);\n                }\n                finally {\n                    if (_numberOfNestedTaskFrames == 1) {\n                        drainMicroTaskQueue();\n                    }\n                    _numberOfNestedTaskFrames--;\n                }\n            }\n            get zone() {\n                return this._zone;\n            }\n            get state() {\n                return this._state;\n            }\n            cancelScheduleRequest() {\n                this._transitionTo(notScheduled, scheduling);\n            }\n            // tslint:disable-next-line:require-internal-with-underscore\n            _transitionTo(toState, fromState1, fromState2) {\n                if (this._state === fromState1 || this._state === fromState2) {\n                    this._state = toState;\n                    if (toState == notScheduled) {\n                        this._zoneDelegates = null;\n                    }\n                }\n                else {\n                    throw new Error(`${this.type} '${this.source}': can not transition to '${toState}', expecting state '${fromState1}'${fromState2 ? ' or \\'' + fromState2 + '\\'' : ''}, was '${this._state}'.`);\n                }\n            }\n            toString() {\n                if (this.data && typeof this.data.handleId !== 'undefined') {\n                    return this.data.handleId.toString();\n                }\n                else {\n                    return Object.prototype.toString.call(this);\n                }\n            }\n            // add toJSON method to prevent cyclic error when\n            // call JSON.stringify(zoneTask)\n            toJSON() {\n                return {\n                    type: this.type,\n                    state: this.state,\n                    source: this.source,\n                    zone: this.zone.name,\n                    runCount: this.runCount\n                };\n            }\n        }\n        //////////////////////////////////////////////////////\n        //////////////////////////////////////////////////////\n        ///  MICROTASK QUEUE\n        //////////////////////////////////////////////////////\n        //////////////////////////////////////////////////////\n        const symbolSetTimeout = __symbol__('setTimeout');\n        const symbolPromise = __symbol__('Promise');\n        const symbolThen = __symbol__('then');\n        let _microTaskQueue = [];\n        let _isDrainingMicrotaskQueue = false;\n        let nativeMicroTaskQueuePromise;\n        function scheduleMicroTask(task) {\n            // if we are not running in any task, and there has not been anything scheduled\n            // we must bootstrap the initial task creation by manually scheduling the drain\n            if (_numberOfNestedTaskFrames === 0 && _microTaskQueue.length === 0) {\n                // We are not running in Task, so we need to kickstart the microtask queue.\n                if (!nativeMicroTaskQueuePromise) {\n                    if (global[symbolPromise]) {\n                        nativeMicroTaskQueuePromise = global[symbolPromise].resolve(0);\n                    }\n                }\n                if (nativeMicroTaskQueuePromise) {\n                    let nativeThen = nativeMicroTaskQueuePromise[symbolThen];\n                    if (!nativeThen) {\n                        // native Promise is not patchable, we need to use `then` directly\n                        // issue 1078\n                        nativeThen = nativeMicroTaskQueuePromise['then'];\n                    }\n                    nativeThen.call(nativeMicroTaskQueuePromise, drainMicroTaskQueue);\n                }\n                else {\n                    global[symbolSetTimeout](drainMicroTaskQueue, 0);\n                }\n            }\n            task && _microTaskQueue.push(task);\n        }\n        function drainMicroTaskQueue() {\n            if (!_isDrainingMicrotaskQueue) {\n                _isDrainingMicrotaskQueue = true;\n                while (_microTaskQueue.length) {\n                    const queue = _microTaskQueue;\n                    _microTaskQueue = [];\n                    for (let i = 0; i < queue.length; i++) {\n                        const task = queue[i];\n                        try {\n                            task.zone.runTask(task, null, null);\n                        }\n                        catch (error) {\n                            _api.onUnhandledError(error);\n                        }\n                    }\n                }\n                _api.microtaskDrainDone();\n                _isDrainingMicrotaskQueue = false;\n            }\n        }\n        //////////////////////////////////////////////////////\n        //////////////////////////////////////////////////////\n        ///  BOOTSTRAP\n        //////////////////////////////////////////////////////\n        //////////////////////////////////////////////////////\n        const NO_ZONE = { name: 'NO ZONE' };\n        const notScheduled = 'notScheduled', scheduling = 'scheduling', scheduled = 'scheduled', running = 'running', canceling = 'canceling', unknown = 'unknown';\n        const microTask = 'microTask', macroTask = 'macroTask', eventTask = 'eventTask';\n        const patches = {};\n        const _api = {\n            symbol: __symbol__,\n            currentZoneFrame: () => _currentZoneFrame,\n            onUnhandledError: noop,\n            microtaskDrainDone: noop,\n            scheduleMicroTask: scheduleMicroTask,\n            showUncaughtError: () => !Zone[__symbol__('ignoreConsoleErrorUncaughtError')],\n            patchEventTarget: () => [],\n            patchOnProperties: noop,\n            patchMethod: () => noop,\n            bindArguments: () => [],\n            patchThen: () => noop,\n            patchMacroTask: () => noop,\n            patchEventPrototype: () => noop,\n            isIEOrEdge: () => false,\n            getGlobalObjects: () => undefined,\n            ObjectDefineProperty: () => noop,\n            ObjectGetOwnPropertyDescriptor: () => undefined,\n            ObjectCreate: () => undefined,\n            ArraySlice: () => [],\n            patchClass: () => noop,\n            wrapWithCurrentZone: () => noop,\n            filterProperties: () => [],\n            attachOriginToPatched: () => noop,\n            _redefineProperty: () => noop,\n            patchCallbacks: () => noop\n        };\n        let _currentZoneFrame = { parent: null, zone: new Zone(null, null) };\n        let _currentTask = null;\n        let _numberOfNestedTaskFrames = 0;\n        function noop() { }\n        performanceMeasure('Zone', 'Zone');\n        return global['Zone'] = Zone;\n    })(typeof window !== 'undefined' && window || typeof self !== 'undefined' && self || global);\n\n    /**\n     * @license\n     * Copyright Google LLC All Rights Reserved.\n     *\n     * Use of this source code is governed by an MIT-style license that can be\n     * found in the LICENSE file at https://angular.io/license\n     */\n    /**\n     * Suppress closure compiler errors about unknown 'Zone' variable\n     * @fileoverview\n     * @suppress {undefinedVars,globalThis,missingRequire}\n     */\n    /// <reference types=\"node\"/>\n    // issue #989, to reduce bundle size, use short name\n    /** Object.getOwnPropertyDescriptor */\n    const ObjectGetOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;\n    /** Object.defineProperty */\n    const ObjectDefineProperty = Object.defineProperty;\n    /** Object.getPrototypeOf */\n    const ObjectGetPrototypeOf = Object.getPrototypeOf;\n    /** Object.create */\n    const ObjectCreate = Object.create;\n    /** Array.prototype.slice */\n    const ArraySlice = Array.prototype.slice;\n    /** addEventListener string const */\n    const ADD_EVENT_LISTENER_STR = 'addEventListener';\n    /** removeEventListener string const */\n    const REMOVE_EVENT_LISTENER_STR = 'removeEventListener';\n    /** zoneSymbol addEventListener */\n    const ZONE_SYMBOL_ADD_EVENT_LISTENER = Zone.__symbol__(ADD_EVENT_LISTENER_STR);\n    /** zoneSymbol removeEventListener */\n    const ZONE_SYMBOL_REMOVE_EVENT_LISTENER = Zone.__symbol__(REMOVE_EVENT_LISTENER_STR);\n    /** true string const */\n    const TRUE_STR = 'true';\n    /** false string const */\n    const FALSE_STR = 'false';\n    /** Zone symbol prefix string const. */\n    const ZONE_SYMBOL_PREFIX = Zone.__symbol__('');\n    function wrapWithCurrentZone(callback, source) {\n        return Zone.current.wrap(callback, source);\n    }\n    function scheduleMacroTaskWithCurrentZone(source, callback, data, customSchedule, customCancel) {\n        return Zone.current.scheduleMacroTask(source, callback, data, customSchedule, customCancel);\n    }\n    const zoneSymbol = Zone.__symbol__;\n    const isWindowExists = typeof window !== 'undefined';\n    const internalWindow = isWindowExists ? window : undefined;\n    const _global = isWindowExists && internalWindow || typeof self === 'object' && self || global;\n    const REMOVE_ATTRIBUTE = 'removeAttribute';\n    const NULL_ON_PROP_VALUE = [null];\n    function bindArguments(args, source) {\n        for (let i = args.length - 1; i >= 0; i--) {\n            if (typeof args[i] === 'function') {\n                args[i] = wrapWithCurrentZone(args[i], source + '_' + i);\n            }\n        }\n        return args;\n    }\n    function patchPrototype(prototype, fnNames) {\n        const source = prototype.constructor['name'];\n        for (let i = 0; i < fnNames.length; i++) {\n            const name = fnNames[i];\n            const delegate = prototype[name];\n            if (delegate) {\n                const prototypeDesc = ObjectGetOwnPropertyDescriptor(prototype, name);\n                if (!isPropertyWritable(prototypeDesc)) {\n                    continue;\n                }\n                prototype[name] = ((delegate) => {\n                    const patched = function () {\n                        return delegate.apply(this, bindArguments(arguments, source + '.' + name));\n                    };\n                    attachOriginToPatched(patched, delegate);\n                    return patched;\n                })(delegate);\n            }\n        }\n    }\n    function isPropertyWritable(propertyDesc) {\n        if (!propertyDesc) {\n            return true;\n        }\n        if (propertyDesc.writable === false) {\n            return false;\n        }\n        return !(typeof propertyDesc.get === 'function' && typeof propertyDesc.set === 'undefined');\n    }\n    const isWebWorker = (typeof WorkerGlobalScope !== 'undefined' && self instanceof WorkerGlobalScope);\n    // Make sure to access `process` through `_global` so that WebPack does not accidentally browserify\n    // this code.\n    const isNode = (!('nw' in _global) && typeof _global.process !== 'undefined' &&\n        {}.toString.call(_global.process) === '[object process]');\n    const isBrowser = !isNode && !isWebWorker && !!(isWindowExists && internalWindow['HTMLElement']);\n    // we are in electron of nw, so we are both browser and nodejs\n    // Make sure to access `process` through `_global` so that WebPack does not accidentally browserify\n    // this code.\n    const isMix = typeof _global.process !== 'undefined' &&\n        {}.toString.call(_global.process) === '[object process]' && !isWebWorker &&\n        !!(isWindowExists && internalWindow['HTMLElement']);\n    const zoneSymbolEventNames = {};\n    const wrapFn = function (event) {\n        // https://github.com/angular/zone.js/issues/911, in IE, sometimes\n        // event will be undefined, so we need to use window.event\n        event = event || _global.event;\n        if (!event) {\n            return;\n        }\n        let eventNameSymbol = zoneSymbolEventNames[event.type];\n        if (!eventNameSymbol) {\n            eventNameSymbol = zoneSymbolEventNames[event.type] = zoneSymbol('ON_PROPERTY' + event.type);\n        }\n        const target = this || event.target || _global;\n        const listener = target[eventNameSymbol];\n        let result;\n        if (isBrowser && target === internalWindow && event.type === 'error') {\n            // window.onerror have different signiture\n            // https://developer.mozilla.org/en-US/docs/Web/API/GlobalEventHandlers/onerror#window.onerror\n            // and onerror callback will prevent default when callback return true\n            const errorEvent = event;\n            result = listener &&\n                listener.call(this, errorEvent.message, errorEvent.filename, errorEvent.lineno, errorEvent.colno, errorEvent.error);\n            if (result === true) {\n                event.preventDefault();\n            }\n        }\n        else {\n            result = listener && listener.apply(this, arguments);\n            if (result != undefined && !result) {\n                event.preventDefault();\n            }\n        }\n        return result;\n    };\n    function patchProperty(obj, prop, prototype) {\n        let desc = ObjectGetOwnPropertyDescriptor(obj, prop);\n        if (!desc && prototype) {\n            // when patch window object, use prototype to check prop exist or not\n            const prototypeDesc = ObjectGetOwnPropertyDescriptor(prototype, prop);\n            if (prototypeDesc) {\n                desc = { enumerable: true, configurable: true };\n            }\n        }\n        // if the descriptor not exists or is not configurable\n        // just return\n        if (!desc || !desc.configurable) {\n            return;\n        }\n        const onPropPatchedSymbol = zoneSymbol('on' + prop + 'patched');\n        if (obj.hasOwnProperty(onPropPatchedSymbol) && obj[onPropPatchedSymbol]) {\n            return;\n        }\n        // A property descriptor cannot have getter/setter and be writable\n        // deleting the writable and value properties avoids this error:\n        //\n        // TypeError: property descriptors must not specify a value or be writable when a\n        // getter or setter has been specified\n        delete desc.writable;\n        delete desc.value;\n        const originalDescGet = desc.get;\n        const originalDescSet = desc.set;\n        // substr(2) cuz 'onclick' -> 'click', etc\n        const eventName = prop.substr(2);\n        let eventNameSymbol = zoneSymbolEventNames[eventName];\n        if (!eventNameSymbol) {\n            eventNameSymbol = zoneSymbolEventNames[eventName] = zoneSymbol('ON_PROPERTY' + eventName);\n        }\n        desc.set = function (newValue) {\n            // in some of windows's onproperty callback, this is undefined\n            // so we need to check it\n            let target = this;\n            if (!target && obj === _global) {\n                target = _global;\n            }\n            if (!target) {\n                return;\n            }\n            let previousValue = target[eventNameSymbol];\n            if (previousValue) {\n                target.removeEventListener(eventName, wrapFn);\n            }\n            // issue #978, when onload handler was added before loading zone.js\n            // we should remove it with originalDescSet\n            if (originalDescSet) {\n                originalDescSet.apply(target, NULL_ON_PROP_VALUE);\n            }\n            if (typeof newValue === 'function') {\n                target[eventNameSymbol] = newValue;\n                target.addEventListener(eventName, wrapFn, false);\n            }\n            else {\n                target[eventNameSymbol] = null;\n            }\n        };\n        // The getter would return undefined for unassigned properties but the default value of an\n        // unassigned property is null\n        desc.get = function () {\n            // in some of windows's onproperty callback, this is undefined\n            // so we need to check it\n            let target = this;\n            if (!target && obj === _global) {\n                target = _global;\n            }\n            if (!target) {\n                return null;\n            }\n            const listener = target[eventNameSymbol];\n            if (listener) {\n                return listener;\n            }\n            else if (originalDescGet) {\n                // result will be null when use inline event attribute,\n                // such as <button onclick=\"func();\">OK</button>\n                // because the onclick function is internal raw uncompiled handler\n                // the onclick will be evaluated when first time event was triggered or\n                // the property is accessed, https://github.com/angular/zone.js/issues/525\n                // so we should use original native get to retrieve the handler\n                let value = originalDescGet && originalDescGet.call(this);\n                if (value) {\n                    desc.set.call(this, value);\n                    if (typeof target[REMOVE_ATTRIBUTE] === 'function') {\n                        target.removeAttribute(prop);\n                    }\n                    return value;\n                }\n            }\n            return null;\n        };\n        ObjectDefineProperty(obj, prop, desc);\n        obj[onPropPatchedSymbol] = true;\n    }\n    function patchOnProperties(obj, properties, prototype) {\n        if (properties) {\n            for (let i = 0; i < properties.length; i++) {\n                patchProperty(obj, 'on' + properties[i], prototype);\n            }\n        }\n        else {\n            const onProperties = [];\n            for (const prop in obj) {\n                if (prop.substr(0, 2) == 'on') {\n                    onProperties.push(prop);\n                }\n            }\n            for (let j = 0; j < onProperties.length; j++) {\n                patchProperty(obj, onProperties[j], prototype);\n            }\n        }\n    }\n    const originalInstanceKey = zoneSymbol('originalInstance');\n    // wrap some native API on `window`\n    function patchClass(className) {\n        const OriginalClass = _global[className];\n        if (!OriginalClass)\n            return;\n        // keep original class in global\n        _global[zoneSymbol(className)] = OriginalClass;\n        _global[className] = function () {\n            const a = bindArguments(arguments, className);\n            switch (a.length) {\n                case 0:\n                    this[originalInstanceKey] = new OriginalClass();\n                    break;\n                case 1:\n                    this[originalInstanceKey] = new OriginalClass(a[0]);\n                    break;\n                case 2:\n                    this[originalInstanceKey] = new OriginalClass(a[0], a[1]);\n                    break;\n                case 3:\n                    this[originalInstanceKey] = new OriginalClass(a[0], a[1], a[2]);\n                    break;\n                case 4:\n                    this[originalInstanceKey] = new OriginalClass(a[0], a[1], a[2], a[3]);\n                    break;\n                default:\n                    throw new Error('Arg list too long.');\n            }\n        };\n        // attach original delegate to patched function\n        attachOriginToPatched(_global[className], OriginalClass);\n        const instance = new OriginalClass(function () { });\n        let prop;\n        for (prop in instance) {\n            // https://bugs.webkit.org/show_bug.cgi?id=44721\n            if (className === 'XMLHttpRequest' && prop === 'responseBlob')\n                continue;\n            (function (prop) {\n                if (typeof instance[prop] === 'function') {\n                    _global[className].prototype[prop] = function () {\n                        return this[originalInstanceKey][prop].apply(this[originalInstanceKey], arguments);\n                    };\n                }\n                else {\n                    ObjectDefineProperty(_global[className].prototype, prop, {\n                        set: function (fn) {\n                            if (typeof fn === 'function') {\n                                this[originalInstanceKey][prop] = wrapWithCurrentZone(fn, className + '.' + prop);\n                                // keep callback in wrapped function so we can\n                                // use it in Function.prototype.toString to return\n                                // the native one.\n                                attachOriginToPatched(this[originalInstanceKey][prop], fn);\n                            }\n                            else {\n                                this[originalInstanceKey][prop] = fn;\n                            }\n                        },\n                        get: function () {\n                            return this[originalInstanceKey][prop];\n                        }\n                    });\n                }\n            }(prop));\n        }\n        for (prop in OriginalClass) {\n            if (prop !== 'prototype' && OriginalClass.hasOwnProperty(prop)) {\n                _global[className][prop] = OriginalClass[prop];\n            }\n        }\n    }\n    function patchMethod(target, name, patchFn) {\n        let proto = target;\n        while (proto && !proto.hasOwnProperty(name)) {\n            proto = ObjectGetPrototypeOf(proto);\n        }\n        if (!proto && target[name]) {\n            // somehow we did not find it, but we can see it. This happens on IE for Window properties.\n            proto = target;\n        }\n        const delegateName = zoneSymbol(name);\n        let delegate = null;\n        if (proto && !(delegate = proto[delegateName])) {\n            delegate = proto[delegateName] = proto[name];\n            // check whether proto[name] is writable\n            // some property is readonly in safari, such as HtmlCanvasElement.prototype.toBlob\n            const desc = proto && ObjectGetOwnPropertyDescriptor(proto, name);\n            if (isPropertyWritable(desc)) {\n                const patchDelegate = patchFn(delegate, delegateName, name);\n                proto[name] = function () {\n                    return patchDelegate(this, arguments);\n                };\n                attachOriginToPatched(proto[name], delegate);\n            }\n        }\n        return delegate;\n    }\n    // TODO: @JiaLiPassion, support cancel task later if necessary\n    function patchMacroTask(obj, funcName, metaCreator) {\n        let setNative = null;\n        function scheduleTask(task) {\n            const data = task.data;\n            data.args[data.cbIdx] = function () {\n                task.invoke.apply(this, arguments);\n            };\n            setNative.apply(data.target, data.args);\n            return task;\n        }\n        setNative = patchMethod(obj, funcName, (delegate) => function (self, args) {\n            const meta = metaCreator(self, args);\n            if (meta.cbIdx >= 0 && typeof args[meta.cbIdx] === 'function') {\n                return scheduleMacroTaskWithCurrentZone(meta.name, args[meta.cbIdx], meta, scheduleTask);\n            }\n            else {\n                // cause an error by calling it directly.\n                return delegate.apply(self, args);\n            }\n        });\n    }\n    function attachOriginToPatched(patched, original) {\n        patched[zoneSymbol('OriginalDelegate')] = original;\n    }\n    let isDetectedIEOrEdge = false;\n    let ieOrEdge = false;\n    function isIE() {\n        try {\n            const ua = internalWindow.navigator.userAgent;\n            if (ua.indexOf('MSIE ') !== -1 || ua.indexOf('Trident/') !== -1) {\n                return true;\n            }\n        }\n        catch (error) {\n        }\n        return false;\n    }\n    function isIEOrEdge() {\n        if (isDetectedIEOrEdge) {\n            return ieOrEdge;\n        }\n        isDetectedIEOrEdge = true;\n        try {\n            const ua = internalWindow.navigator.userAgent;\n            if (ua.indexOf('MSIE ') !== -1 || ua.indexOf('Trident/') !== -1 || ua.indexOf('Edge/') !== -1) {\n                ieOrEdge = true;\n            }\n        }\n        catch (error) {\n        }\n        return ieOrEdge;\n    }\n\n    /**\n     * @license\n     * Copyright Google LLC All Rights Reserved.\n     *\n     * Use of this source code is governed by an MIT-style license that can be\n     * found in the LICENSE file at https://angular.io/license\n     */\n    Zone.__load_patch('ZoneAwarePromise', (global, Zone, api) => {\n        const ObjectGetOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;\n        const ObjectDefineProperty = Object.defineProperty;\n        function readableObjectToString(obj) {\n            if (obj && obj.toString === Object.prototype.toString) {\n                const className = obj.constructor && obj.constructor.name;\n                return (className ? className : '') + ': ' + JSON.stringify(obj);\n            }\n            return obj ? obj.toString() : Object.prototype.toString.call(obj);\n        }\n        const __symbol__ = api.symbol;\n        const _uncaughtPromiseErrors = [];\n        const isDisableWrappingUncaughtPromiseRejection = global[__symbol__('DISABLE_WRAPPING_UNCAUGHT_PROMISE_REJECTION')] === true;\n        const symbolPromise = __symbol__('Promise');\n        const symbolThen = __symbol__('then');\n        const creationTrace = '__creationTrace__';\n        api.onUnhandledError = (e) => {\n            if (api.showUncaughtError()) {\n                const rejection = e && e.rejection;\n                if (rejection) {\n                    console.error('Unhandled Promise rejection:', rejection instanceof Error ? rejection.message : rejection, '; Zone:', e.zone.name, '; Task:', e.task && e.task.source, '; Value:', rejection, rejection instanceof Error ? rejection.stack : undefined);\n                }\n                else {\n                    console.error(e);\n                }\n            }\n        };\n        api.microtaskDrainDone = () => {\n            while (_uncaughtPromiseErrors.length) {\n                const uncaughtPromiseError = _uncaughtPromiseErrors.shift();\n                try {\n                    uncaughtPromiseError.zone.runGuarded(() => {\n                        throw uncaughtPromiseError;\n                    });\n                }\n                catch (error) {\n                    handleUnhandledRejection(error);\n                }\n            }\n        };\n        const UNHANDLED_PROMISE_REJECTION_HANDLER_SYMBOL = __symbol__('unhandledPromiseRejectionHandler');\n        function handleUnhandledRejection(e) {\n            api.onUnhandledError(e);\n            try {\n                const handler = Zone[UNHANDLED_PROMISE_REJECTION_HANDLER_SYMBOL];\n                if (typeof handler === 'function') {\n                    handler.call(this, e);\n                }\n            }\n            catch (err) {\n            }\n        }\n        function isThenable(value) {\n            return value && value.then;\n        }\n        function forwardResolution(value) {\n            return value;\n        }\n        function forwardRejection(rejection) {\n            return ZoneAwarePromise.reject(rejection);\n        }\n        const symbolState = __symbol__('state');\n        const symbolValue = __symbol__('value');\n        const symbolFinally = __symbol__('finally');\n        const symbolParentPromiseValue = __symbol__('parentPromiseValue');\n        const symbolParentPromiseState = __symbol__('parentPromiseState');\n        const source = 'Promise.then';\n        const UNRESOLVED = null;\n        const RESOLVED = true;\n        const REJECTED = false;\n        const REJECTED_NO_CATCH = 0;\n        function makeResolver(promise, state) {\n            return (v) => {\n                try {\n                    resolvePromise(promise, state, v);\n                }\n                catch (err) {\n                    resolvePromise(promise, false, err);\n                }\n                // Do not return value or you will break the Promise spec.\n            };\n        }\n        const once = function () {\n            let wasCalled = false;\n            return function wrapper(wrappedFunction) {\n                return function () {\n                    if (wasCalled) {\n                        return;\n                    }\n                    wasCalled = true;\n                    wrappedFunction.apply(null, arguments);\n                };\n            };\n        };\n        const TYPE_ERROR = 'Promise resolved with itself';\n        const CURRENT_TASK_TRACE_SYMBOL = __symbol__('currentTaskTrace');\n        // Promise Resolution\n        function resolvePromise(promise, state, value) {\n            const onceWrapper = once();\n            if (promise === value) {\n                throw new TypeError(TYPE_ERROR);\n            }\n            if (promise[symbolState] === UNRESOLVED) {\n                // should only get value.then once based on promise spec.\n                let then = null;\n                try {\n                    if (typeof value === 'object' || typeof value === 'function') {\n                        then = value && value.then;\n                    }\n                }\n                catch (err) {\n                    onceWrapper(() => {\n                        resolvePromise(promise, false, err);\n                    })();\n                    return promise;\n                }\n                // if (value instanceof ZoneAwarePromise) {\n                if (state !== REJECTED && value instanceof ZoneAwarePromise &&\n                    value.hasOwnProperty(symbolState) && value.hasOwnProperty(symbolValue) &&\n                    value[symbolState] !== UNRESOLVED) {\n                    clearRejectedNoCatch(value);\n                    resolvePromise(promise, value[symbolState], value[symbolValue]);\n                }\n                else if (state !== REJECTED && typeof then === 'function') {\n                    try {\n                        then.call(value, onceWrapper(makeResolver(promise, state)), onceWrapper(makeResolver(promise, false)));\n                    }\n                    catch (err) {\n                        onceWrapper(() => {\n                            resolvePromise(promise, false, err);\n                        })();\n                    }\n                }\n                else {\n                    promise[symbolState] = state;\n                    const queue = promise[symbolValue];\n                    promise[symbolValue] = value;\n                    if (promise[symbolFinally] === symbolFinally) {\n                        // the promise is generated by Promise.prototype.finally\n                        if (state === RESOLVED) {\n                            // the state is resolved, should ignore the value\n                            // and use parent promise value\n                            promise[symbolState] = promise[symbolParentPromiseState];\n                            promise[symbolValue] = promise[symbolParentPromiseValue];\n                        }\n                    }\n                    // record task information in value when error occurs, so we can\n                    // do some additional work such as render longStackTrace\n                    if (state === REJECTED && value instanceof Error) {\n                        // check if longStackTraceZone is here\n                        const trace = Zone.currentTask && Zone.currentTask.data &&\n                            Zone.currentTask.data[creationTrace];\n                        if (trace) {\n                            // only keep the long stack trace into error when in longStackTraceZone\n                            ObjectDefineProperty(value, CURRENT_TASK_TRACE_SYMBOL, { configurable: true, enumerable: false, writable: true, value: trace });\n                        }\n                    }\n                    for (let i = 0; i < queue.length;) {\n                        scheduleResolveOrReject(promise, queue[i++], queue[i++], queue[i++], queue[i++]);\n                    }\n                    if (queue.length == 0 && state == REJECTED) {\n                        promise[symbolState] = REJECTED_NO_CATCH;\n                        let uncaughtPromiseError = value;\n                        if (!isDisableWrappingUncaughtPromiseRejection) {\n                            // If disable wrapping uncaught promise reject\n                            // and the rejected value is an Error object,\n                            // use the value instead of wrapping it.\n                            try {\n                                // Here we throws a new Error to print more readable error log\n                                // and if the value is not an error, zone.js builds an `Error`\n                                // Object here to attach the stack information.\n                                throw new Error('Uncaught (in promise): ' + readableObjectToString(value) +\n                                    (value && value.stack ? '\\n' + value.stack : ''));\n                            }\n                            catch (err) {\n                                uncaughtPromiseError = err;\n                            }\n                        }\n                        uncaughtPromiseError.rejection = value;\n                        uncaughtPromiseError.promise = promise;\n                        uncaughtPromiseError.zone = Zone.current;\n                        uncaughtPromiseError.task = Zone.currentTask;\n                        _uncaughtPromiseErrors.push(uncaughtPromiseError);\n                        api.scheduleMicroTask(); // to make sure that it is running\n                    }\n                }\n            }\n            // Resolving an already resolved promise is a noop.\n            return promise;\n        }\n        const REJECTION_HANDLED_HANDLER = __symbol__('rejectionHandledHandler');\n        function clearRejectedNoCatch(promise) {\n            if (promise[symbolState] === REJECTED_NO_CATCH) {\n                // if the promise is rejected no catch status\n                // and queue.length > 0, means there is a error handler\n                // here to handle the rejected promise, we should trigger\n                // windows.rejectionhandled eventHandler or nodejs rejectionHandled\n                // eventHandler\n                try {\n                    const handler = Zone[REJECTION_HANDLED_HANDLER];\n                    if (handler && typeof handler === 'function') {\n                        handler.call(this, { rejection: promise[symbolValue], promise: promise });\n                    }\n                }\n                catch (err) {\n                }\n                promise[symbolState] = REJECTED;\n                for (let i = 0; i < _uncaughtPromiseErrors.length; i++) {\n                    if (promise === _uncaughtPromiseErrors[i].promise) {\n                        _uncaughtPromiseErrors.splice(i, 1);\n                    }\n                }\n            }\n        }\n        function scheduleResolveOrReject(promise, zone, chainPromise, onFulfilled, onRejected) {\n            clearRejectedNoCatch(promise);\n            const promiseState = promise[symbolState];\n            const delegate = promiseState ?\n                (typeof onFulfilled === 'function') ? onFulfilled : forwardResolution :\n                (typeof onRejected === 'function') ? onRejected : forwardRejection;\n            zone.scheduleMicroTask(source, () => {\n                try {\n                    const parentPromiseValue = promise[symbolValue];\n                    const isFinallyPromise = !!chainPromise && symbolFinally === chainPromise[symbolFinally];\n                    if (isFinallyPromise) {\n                        // if the promise is generated from finally call, keep parent promise's state and value\n                        chainPromise[symbolParentPromiseValue] = parentPromiseValue;\n                        chainPromise[symbolParentPromiseState] = promiseState;\n                    }\n                    // should not pass value to finally callback\n                    const value = zone.run(delegate, undefined, isFinallyPromise && delegate !== forwardRejection && delegate !== forwardResolution ?\n                        [] :\n                        [parentPromiseValue]);\n                    resolvePromise(chainPromise, true, value);\n                }\n                catch (error) {\n                    // if error occurs, should always return this error\n                    resolvePromise(chainPromise, false, error);\n                }\n            }, chainPromise);\n        }\n        const ZONE_AWARE_PROMISE_TO_STRING = 'function ZoneAwarePromise() { [native code] }';\n        const noop = function () { };\n        class ZoneAwarePromise {\n            static toString() {\n                return ZONE_AWARE_PROMISE_TO_STRING;\n            }\n            static resolve(value) {\n                return resolvePromise(new this(null), RESOLVED, value);\n            }\n            static reject(error) {\n                return resolvePromise(new this(null), REJECTED, error);\n            }\n            static race(values) {\n                let resolve;\n                let reject;\n                let promise = new this((res, rej) => {\n                    resolve = res;\n                    reject = rej;\n                });\n                function onResolve(value) {\n                    resolve(value);\n                }\n                function onReject(error) {\n                    reject(error);\n                }\n                for (let value of values) {\n                    if (!isThenable(value)) {\n                        value = this.resolve(value);\n                    }\n                    value.then(onResolve, onReject);\n                }\n                return promise;\n            }\n            static all(values) {\n                return ZoneAwarePromise.allWithCallback(values);\n            }\n            static allSettled(values) {\n                const P = this && this.prototype instanceof ZoneAwarePromise ? this : ZoneAwarePromise;\n                return P.allWithCallback(values, {\n                    thenCallback: (value) => ({ status: 'fulfilled', value }),\n                    errorCallback: (err) => ({ status: 'rejected', reason: err })\n                });\n            }\n            static allWithCallback(values, callback) {\n                let resolve;\n                let reject;\n                let promise = new this((res, rej) => {\n                    resolve = res;\n                    reject = rej;\n                });\n                // Start at 2 to prevent prematurely resolving if .then is called immediately.\n                let unresolvedCount = 2;\n                let valueIndex = 0;\n                const resolvedValues = [];\n                for (let value of values) {\n                    if (!isThenable(value)) {\n                        value = this.resolve(value);\n                    }\n                    const curValueIndex = valueIndex;\n                    try {\n                        value.then((value) => {\n                            resolvedValues[curValueIndex] = callback ? callback.thenCallback(value) : value;\n                            unresolvedCount--;\n                            if (unresolvedCount === 0) {\n                                resolve(resolvedValues);\n                            }\n                        }, (err) => {\n                            if (!callback) {\n                                reject(err);\n                            }\n                            else {\n                                resolvedValues[curValueIndex] = callback.errorCallback(err);\n                                unresolvedCount--;\n                                if (unresolvedCount === 0) {\n                                    resolve(resolvedValues);\n                                }\n                            }\n                        });\n                    }\n                    catch (thenErr) {\n                        reject(thenErr);\n                    }\n                    unresolvedCount++;\n                    valueIndex++;\n                }\n                // Make the unresolvedCount zero-based again.\n                unresolvedCount -= 2;\n                if (unresolvedCount === 0) {\n                    resolve(resolvedValues);\n                }\n                return promise;\n            }\n            constructor(executor) {\n                const promise = this;\n                if (!(promise instanceof ZoneAwarePromise)) {\n                    throw new Error('Must be an instanceof Promise.');\n                }\n                promise[symbolState] = UNRESOLVED;\n                promise[symbolValue] = []; // queue;\n                try {\n                    executor && executor(makeResolver(promise, RESOLVED), makeResolver(promise, REJECTED));\n                }\n                catch (error) {\n                    resolvePromise(promise, false, error);\n                }\n            }\n            get [Symbol.toStringTag]() {\n                return 'Promise';\n            }\n            get [Symbol.species]() {\n                return ZoneAwarePromise;\n            }\n            then(onFulfilled, onRejected) {\n                let C = this.constructor[Symbol.species];\n                if (!C || typeof C !== 'function') {\n                    C = this.constructor || ZoneAwarePromise;\n                }\n                const chainPromise = new C(noop);\n                const zone = Zone.current;\n                if (this[symbolState] == UNRESOLVED) {\n                    this[symbolValue].push(zone, chainPromise, onFulfilled, onRejected);\n                }\n                else {\n                    scheduleResolveOrReject(this, zone, chainPromise, onFulfilled, onRejected);\n                }\n                return chainPromise;\n            }\n            catch(onRejected) {\n                return this.then(null, onRejected);\n            }\n            finally(onFinally) {\n                let C = this.constructor[Symbol.species];\n                if (!C || typeof C !== 'function') {\n                    C = ZoneAwarePromise;\n                }\n                const chainPromise = new C(noop);\n                chainPromise[symbolFinally] = symbolFinally;\n                const zone = Zone.current;\n                if (this[symbolState] == UNRESOLVED) {\n                    this[symbolValue].push(zone, chainPromise, onFinally, onFinally);\n                }\n                else {\n                    scheduleResolveOrReject(this, zone, chainPromise, onFinally, onFinally);\n                }\n                return chainPromise;\n            }\n        }\n        // Protect against aggressive optimizers dropping seemingly unused properties.\n        // E.g. Closure Compiler in advanced mode.\n        ZoneAwarePromise['resolve'] = ZoneAwarePromise.resolve;\n        ZoneAwarePromise['reject'] = ZoneAwarePromise.reject;\n        ZoneAwarePromise['race'] = ZoneAwarePromise.race;\n        ZoneAwarePromise['all'] = ZoneAwarePromise.all;\n        const NativePromise = global[symbolPromise] = global['Promise'];\n        global['Promise'] = ZoneAwarePromise;\n        const symbolThenPatched = __symbol__('thenPatched');\n        function patchThen(Ctor) {\n            const proto = Ctor.prototype;\n            const prop = ObjectGetOwnPropertyDescriptor(proto, 'then');\n            if (prop && (prop.writable === false || !prop.configurable)) {\n                // check Ctor.prototype.then propertyDescriptor is writable or not\n                // in meteor env, writable is false, we should ignore such case\n                return;\n            }\n            const originalThen = proto.then;\n            // Keep a reference to the original method.\n            proto[symbolThen] = originalThen;\n            Ctor.prototype.then = function (onResolve, onReject) {\n                const wrapped = new ZoneAwarePromise((resolve, reject) => {\n                    originalThen.call(this, resolve, reject);\n                });\n                return wrapped.then(onResolve, onReject);\n            };\n            Ctor[symbolThenPatched] = true;\n        }\n        api.patchThen = patchThen;\n        function zoneify(fn) {\n            return function (self, args) {\n                let resultPromise = fn.apply(self, args);\n                if (resultPromise instanceof ZoneAwarePromise) {\n                    return resultPromise;\n                }\n                let ctor = resultPromise.constructor;\n                if (!ctor[symbolThenPatched]) {\n                    patchThen(ctor);\n                }\n                return resultPromise;\n            };\n        }\n        if (NativePromise) {\n            patchThen(NativePromise);\n            patchMethod(global, 'fetch', delegate => zoneify(delegate));\n        }\n        // This is not part of public API, but it is useful for tests, so we expose it.\n        Promise[Zone.__symbol__('uncaughtPromiseErrors')] = _uncaughtPromiseErrors;\n        return ZoneAwarePromise;\n    });\n\n    /**\n     * @license\n     * Copyright Google LLC All Rights Reserved.\n     *\n     * Use of this source code is governed by an MIT-style license that can be\n     * found in the LICENSE file at https://angular.io/license\n     */\n    // override Function.prototype.toString to make zone.js patched function\n    // look like native function\n    Zone.__load_patch('toString', (global) => {\n        // patch Func.prototype.toString to let them look like native\n        const originalFunctionToString = Function.prototype.toString;\n        const ORIGINAL_DELEGATE_SYMBOL = zoneSymbol('OriginalDelegate');\n        const PROMISE_SYMBOL = zoneSymbol('Promise');\n        const ERROR_SYMBOL = zoneSymbol('Error');\n        const newFunctionToString = function toString() {\n            if (typeof this === 'function') {\n                const originalDelegate = this[ORIGINAL_DELEGATE_SYMBOL];\n                if (originalDelegate) {\n                    if (typeof originalDelegate === 'function') {\n                        return originalFunctionToString.call(originalDelegate);\n                    }\n                    else {\n                        return Object.prototype.toString.call(originalDelegate);\n                    }\n                }\n                if (this === Promise) {\n                    const nativePromise = global[PROMISE_SYMBOL];\n                    if (nativePromise) {\n                        return originalFunctionToString.call(nativePromise);\n                    }\n                }\n                if (this === Error) {\n                    const nativeError = global[ERROR_SYMBOL];\n                    if (nativeError) {\n                        return originalFunctionToString.call(nativeError);\n                    }\n                }\n            }\n            return originalFunctionToString.call(this);\n        };\n        newFunctionToString[ORIGINAL_DELEGATE_SYMBOL] = originalFunctionToString;\n        Function.prototype.toString = newFunctionToString;\n        // patch Object.prototype.toString to let them look like native\n        const originalObjectToString = Object.prototype.toString;\n        const PROMISE_OBJECT_TO_STRING = '[object Promise]';\n        Object.prototype.toString = function () {\n            if (this instanceof Promise) {\n                return PROMISE_OBJECT_TO_STRING;\n            }\n            return originalObjectToString.call(this);\n        };\n    });\n\n    /**\n     * @license\n     * Copyright Google LLC All Rights Reserved.\n     *\n     * Use of this source code is governed by an MIT-style license that can be\n     * found in the LICENSE file at https://angular.io/license\n     */\n    let passiveSupported = false;\n    if (typeof window !== 'undefined') {\n        try {\n            const options = Object.defineProperty({}, 'passive', {\n                get: function () {\n                    passiveSupported = true;\n                }\n            });\n            window.addEventListener('test', options, options);\n            window.removeEventListener('test', options, options);\n        }\n        catch (err) {\n            passiveSupported = false;\n        }\n    }\n    // an identifier to tell ZoneTask do not create a new invoke closure\n    const OPTIMIZED_ZONE_EVENT_TASK_DATA = {\n        useG: true\n    };\n    const zoneSymbolEventNames$1 = {};\n    const globalSources = {};\n    const EVENT_NAME_SYMBOL_REGX = new RegExp('^' + ZONE_SYMBOL_PREFIX + '(\\\\w+)(true|false)$');\n    const IMMEDIATE_PROPAGATION_SYMBOL = zoneSymbol('propagationStopped');\n    function prepareEventNames(eventName, eventNameToString) {\n        const falseEventName = (eventNameToString ? eventNameToString(eventName) : eventName) + FALSE_STR;\n        const trueEventName = (eventNameToString ? eventNameToString(eventName) : eventName) + TRUE_STR;\n        const symbol = ZONE_SYMBOL_PREFIX + falseEventName;\n        const symbolCapture = ZONE_SYMBOL_PREFIX + trueEventName;\n        zoneSymbolEventNames$1[eventName] = {};\n        zoneSymbolEventNames$1[eventName][FALSE_STR] = symbol;\n        zoneSymbolEventNames$1[eventName][TRUE_STR] = symbolCapture;\n    }\n    function patchEventTarget(_global, apis, patchOptions) {\n        const ADD_EVENT_LISTENER = (patchOptions && patchOptions.add) || ADD_EVENT_LISTENER_STR;\n        const REMOVE_EVENT_LISTENER = (patchOptions && patchOptions.rm) || REMOVE_EVENT_LISTENER_STR;\n        const LISTENERS_EVENT_LISTENER = (patchOptions && patchOptions.listeners) || 'eventListeners';\n        const REMOVE_ALL_LISTENERS_EVENT_LISTENER = (patchOptions && patchOptions.rmAll) || 'removeAllListeners';\n        const zoneSymbolAddEventListener = zoneSymbol(ADD_EVENT_LISTENER);\n        const ADD_EVENT_LISTENER_SOURCE = '.' + ADD_EVENT_LISTENER + ':';\n        const PREPEND_EVENT_LISTENER = 'prependListener';\n        const PREPEND_EVENT_LISTENER_SOURCE = '.' + PREPEND_EVENT_LISTENER + ':';\n        const invokeTask = function (task, target, event) {\n            // for better performance, check isRemoved which is set\n            // by removeEventListener\n            if (task.isRemoved) {\n                return;\n            }\n            const delegate = task.callback;\n            if (typeof delegate === 'object' && delegate.handleEvent) {\n                // create the bind version of handleEvent when invoke\n                task.callback = (event) => delegate.handleEvent(event);\n                task.originalDelegate = delegate;\n            }\n            // invoke static task.invoke\n            task.invoke(task, target, [event]);\n            const options = task.options;\n            if (options && typeof options === 'object' && options.once) {\n                // if options.once is true, after invoke once remove listener here\n                // only browser need to do this, nodejs eventEmitter will cal removeListener\n                // inside EventEmitter.once\n                const delegate = task.originalDelegate ? task.originalDelegate : task.callback;\n                target[REMOVE_EVENT_LISTENER].call(target, event.type, delegate, options);\n            }\n        };\n        // global shared zoneAwareCallback to handle all event callback with capture = false\n        const globalZoneAwareCallback = function (event) {\n            // https://github.com/angular/zone.js/issues/911, in IE, sometimes\n            // event will be undefined, so we need to use window.event\n            event = event || _global.event;\n            if (!event) {\n                return;\n            }\n            // event.target is needed for Samsung TV and SourceBuffer\n            // || global is needed https://github.com/angular/zone.js/issues/190\n            const target = this || event.target || _global;\n            const tasks = target[zoneSymbolEventNames$1[event.type][FALSE_STR]];\n            if (tasks) {\n                // invoke all tasks which attached to current target with given event.type and capture = false\n                // for performance concern, if task.length === 1, just invoke\n                if (tasks.length === 1) {\n                    invokeTask(tasks[0], target, event);\n                }\n                else {\n                    // https://github.com/angular/zone.js/issues/836\n                    // copy the tasks array before invoke, to avoid\n                    // the callback will remove itself or other listener\n                    const copyTasks = tasks.slice();\n                    for (let i = 0; i < copyTasks.length; i++) {\n                        if (event && event[IMMEDIATE_PROPAGATION_SYMBOL] === true) {\n                            break;\n                        }\n                        invokeTask(copyTasks[i], target, event);\n                    }\n                }\n            }\n        };\n        // global shared zoneAwareCallback to handle all event callback with capture = true\n        const globalZoneAwareCaptureCallback = function (event) {\n            // https://github.com/angular/zone.js/issues/911, in IE, sometimes\n            // event will be undefined, so we need to use window.event\n            event = event || _global.event;\n            if (!event) {\n                return;\n            }\n            // event.target is needed for Samsung TV and SourceBuffer\n            // || global is needed https://github.com/angular/zone.js/issues/190\n            const target = this || event.target || _global;\n            const tasks = target[zoneSymbolEventNames$1[event.type][TRUE_STR]];\n            if (tasks) {\n                // invoke all tasks which attached to current target with given event.type and capture = false\n                // for performance concern, if task.length === 1, just invoke\n                if (tasks.length === 1) {\n                    invokeTask(tasks[0], target, event);\n                }\n                else {\n                    // https://github.com/angular/zone.js/issues/836\n                    // copy the tasks array before invoke, to avoid\n                    // the callback will remove itself or other listener\n                    const copyTasks = tasks.slice();\n                    for (let i = 0; i < copyTasks.length; i++) {\n                        if (event && event[IMMEDIATE_PROPAGATION_SYMBOL] === true) {\n                            break;\n                        }\n                        invokeTask(copyTasks[i], target, event);\n                    }\n                }\n            }\n        };\n        function patchEventTargetMethods(obj, patchOptions) {\n            if (!obj) {\n                return false;\n            }\n            let useGlobalCallback = true;\n            if (patchOptions && patchOptions.useG !== undefined) {\n                useGlobalCallback = patchOptions.useG;\n            }\n            const validateHandler = patchOptions && patchOptions.vh;\n            let checkDuplicate = true;\n            if (patchOptions && patchOptions.chkDup !== undefined) {\n                checkDuplicate = patchOptions.chkDup;\n            }\n            let returnTarget = false;\n            if (patchOptions && patchOptions.rt !== undefined) {\n                returnTarget = patchOptions.rt;\n            }\n            let proto = obj;\n            while (proto && !proto.hasOwnProperty(ADD_EVENT_LISTENER)) {\n                proto = ObjectGetPrototypeOf(proto);\n            }\n            if (!proto && obj[ADD_EVENT_LISTENER]) {\n                // somehow we did not find it, but we can see it. This happens on IE for Window properties.\n                proto = obj;\n            }\n            if (!proto) {\n                return false;\n            }\n            if (proto[zoneSymbolAddEventListener]) {\n                return false;\n            }\n            const eventNameToString = patchOptions && patchOptions.eventNameToString;\n            // a shared global taskData to pass data for scheduleEventTask\n            // so we do not need to create a new object just for pass some data\n            const taskData = {};\n            const nativeAddEventListener = proto[zoneSymbolAddEventListener] = proto[ADD_EVENT_LISTENER];\n            const nativeRemoveEventListener = proto[zoneSymbol(REMOVE_EVENT_LISTENER)] =\n                proto[REMOVE_EVENT_LISTENER];\n            const nativeListeners = proto[zoneSymbol(LISTENERS_EVENT_LISTENER)] =\n                proto[LISTENERS_EVENT_LISTENER];\n            const nativeRemoveAllListeners = proto[zoneSymbol(REMOVE_ALL_LISTENERS_EVENT_LISTENER)] =\n                proto[REMOVE_ALL_LISTENERS_EVENT_LISTENER];\n            let nativePrependEventListener;\n            if (patchOptions && patchOptions.prepend) {\n                nativePrependEventListener = proto[zoneSymbol(patchOptions.prepend)] =\n                    proto[patchOptions.prepend];\n            }\n            /**\n             * This util function will build an option object with passive option\n             * to handle all possible input from the user.\n             */\n            function buildEventListenerOptions(options, passive) {\n                if (!passiveSupported && typeof options === 'object' && options) {\n                    // doesn't support passive but user want to pass an object as options.\n                    // this will not work on some old browser, so we just pass a boolean\n                    // as useCapture parameter\n                    return !!options.capture;\n                }\n                if (!passiveSupported || !passive) {\n                    return options;\n                }\n                if (typeof options === 'boolean') {\n                    return { capture: options, passive: true };\n                }\n                if (!options) {\n                    return { passive: true };\n                }\n                if (typeof options === 'object' && options.passive !== false) {\n                    return Object.assign(Object.assign({}, options), { passive: true });\n                }\n                return options;\n            }\n            const customScheduleGlobal = function (task) {\n                // if there is already a task for the eventName + capture,\n                // just return, because we use the shared globalZoneAwareCallback here.\n                if (taskData.isExisting) {\n                    return;\n                }\n                return nativeAddEventListener.call(taskData.target, taskData.eventName, taskData.capture ? globalZoneAwareCaptureCallback : globalZoneAwareCallback, taskData.options);\n            };\n            const customCancelGlobal = function (task) {\n                // if task is not marked as isRemoved, this call is directly\n                // from Zone.prototype.cancelTask, we should remove the task\n                // from tasksList of target first\n                if (!task.isRemoved) {\n                    const symbolEventNames = zoneSymbolEventNames$1[task.eventName];\n                    let symbolEventName;\n                    if (symbolEventNames) {\n                        symbolEventName = symbolEventNames[task.capture ? TRUE_STR : FALSE_STR];\n                    }\n                    const existingTasks = symbolEventName && task.target[symbolEventName];\n                    if (existingTasks) {\n                        for (let i = 0; i < existingTasks.length; i++) {\n                            const existingTask = existingTasks[i];\n                            if (existingTask === task) {\n                                existingTasks.splice(i, 1);\n                                // set isRemoved to data for faster invokeTask check\n                                task.isRemoved = true;\n                                if (existingTasks.length === 0) {\n                                    // all tasks for the eventName + capture have gone,\n                                    // remove globalZoneAwareCallback and remove the task cache from target\n                                    task.allRemoved = true;\n                                    task.target[symbolEventName] = null;\n                                }\n                                break;\n                            }\n                        }\n                    }\n                }\n                // if all tasks for the eventName + capture have gone,\n                // we will really remove the global event callback,\n                // if not, return\n                if (!task.allRemoved) {\n                    return;\n                }\n                return nativeRemoveEventListener.call(task.target, task.eventName, task.capture ? globalZoneAwareCaptureCallback : globalZoneAwareCallback, task.options);\n            };\n            const customScheduleNonGlobal = function (task) {\n                return nativeAddEventListener.call(taskData.target, taskData.eventName, task.invoke, taskData.options);\n            };\n            const customSchedulePrepend = function (task) {\n                return nativePrependEventListener.call(taskData.target, taskData.eventName, task.invoke, taskData.options);\n            };\n            const customCancelNonGlobal = function (task) {\n                return nativeRemoveEventListener.call(task.target, task.eventName, task.invoke, task.options);\n            };\n            const customSchedule = useGlobalCallback ? customScheduleGlobal : customScheduleNonGlobal;\n            const customCancel = useGlobalCallback ? customCancelGlobal : customCancelNonGlobal;\n            const compareTaskCallbackVsDelegate = function (task, delegate) {\n                const typeOfDelegate = typeof delegate;\n                return (typeOfDelegate === 'function' && task.callback === delegate) ||\n                    (typeOfDelegate === 'object' && task.originalDelegate === delegate);\n            };\n            const compare = (patchOptions && patchOptions.diff) ? patchOptions.diff : compareTaskCallbackVsDelegate;\n            const blackListedEvents = Zone[zoneSymbol('BLACK_LISTED_EVENTS')];\n            const passiveEvents = _global[zoneSymbol('PASSIVE_EVENTS')];\n            const makeAddListener = function (nativeListener, addSource, customScheduleFn, customCancelFn, returnTarget = false, prepend = false) {\n                return function () {\n                    const target = this || _global;\n                    let eventName = arguments[0];\n                    if (patchOptions && patchOptions.transferEventName) {\n                        eventName = patchOptions.transferEventName(eventName);\n                    }\n                    let delegate = arguments[1];\n                    if (!delegate) {\n                        return nativeListener.apply(this, arguments);\n                    }\n                    if (isNode && eventName === 'uncaughtException') {\n                        // don't patch uncaughtException of nodejs to prevent endless loop\n                        return nativeListener.apply(this, arguments);\n                    }\n                    // don't create the bind delegate function for handleEvent\n                    // case here to improve addEventListener performance\n                    // we will create the bind delegate when invoke\n                    let isHandleEvent = false;\n                    if (typeof delegate !== 'function') {\n                        if (!delegate.handleEvent) {\n                            return nativeListener.apply(this, arguments);\n                        }\n                        isHandleEvent = true;\n                    }\n                    if (validateHandler && !validateHandler(nativeListener, delegate, target, arguments)) {\n                        return;\n                    }\n                    const passive = passiveSupported && !!passiveEvents && passiveEvents.indexOf(eventName) !== -1;\n                    const options = buildEventListenerOptions(arguments[2], passive);\n                    if (blackListedEvents) {\n                        // check black list\n                        for (let i = 0; i < blackListedEvents.length; i++) {\n                            if (eventName === blackListedEvents[i]) {\n                                if (passive) {\n                                    return nativeListener.call(target, eventName, delegate, options);\n                                }\n                                else {\n                                    return nativeListener.apply(this, arguments);\n                                }\n                            }\n                        }\n                    }\n                    const capture = !options ? false : typeof options === 'boolean' ? true : options.capture;\n                    const once = options && typeof options === 'object' ? options.once : false;\n                    const zone = Zone.current;\n                    let symbolEventNames = zoneSymbolEventNames$1[eventName];\n                    if (!symbolEventNames) {\n                        prepareEventNames(eventName, eventNameToString);\n                        symbolEventNames = zoneSymbolEventNames$1[eventName];\n                    }\n                    const symbolEventName = symbolEventNames[capture ? TRUE_STR : FALSE_STR];\n                    let existingTasks = target[symbolEventName];\n                    let isExisting = false;\n                    if (existingTasks) {\n                        // already have task registered\n                        isExisting = true;\n                        if (checkDuplicate) {\n                            for (let i = 0; i < existingTasks.length; i++) {\n                                if (compare(existingTasks[i], delegate)) {\n                                    // same callback, same capture, same event name, just return\n                                    return;\n                                }\n                            }\n                        }\n                    }\n                    else {\n                        existingTasks = target[symbolEventName] = [];\n                    }\n                    let source;\n                    const constructorName = target.constructor['name'];\n                    const targetSource = globalSources[constructorName];\n                    if (targetSource) {\n                        source = targetSource[eventName];\n                    }\n                    if (!source) {\n                        source = constructorName + addSource +\n                            (eventNameToString ? eventNameToString(eventName) : eventName);\n                    }\n                    // do not create a new object as task.data to pass those things\n                    // just use the global shared one\n                    taskData.options = options;\n                    if (once) {\n                        // if addEventListener with once options, we don't pass it to\n                        // native addEventListener, instead we keep the once setting\n                        // and handle ourselves.\n                        taskData.options.once = false;\n                    }\n                    taskData.target = target;\n                    taskData.capture = capture;\n                    taskData.eventName = eventName;\n                    taskData.isExisting = isExisting;\n                    const data = useGlobalCallback ? OPTIMIZED_ZONE_EVENT_TASK_DATA : undefined;\n                    // keep taskData into data to allow onScheduleEventTask to access the task information\n                    if (data) {\n                        data.taskData = taskData;\n                    }\n                    const task = zone.scheduleEventTask(source, delegate, data, customScheduleFn, customCancelFn);\n                    // should clear taskData.target to avoid memory leak\n                    // issue, https://github.com/angular/angular/issues/20442\n                    taskData.target = null;\n                    // need to clear up taskData because it is a global object\n                    if (data) {\n                        data.taskData = null;\n                    }\n                    // have to save those information to task in case\n                    // application may call task.zone.cancelTask() directly\n                    if (once) {\n                        options.once = true;\n                    }\n                    if (!(!passiveSupported && typeof task.options === 'boolean')) {\n                        // if not support passive, and we pass an option object\n                        // to addEventListener, we should save the options to task\n                        task.options = options;\n                    }\n                    task.target = target;\n                    task.capture = capture;\n                    task.eventName = eventName;\n                    if (isHandleEvent) {\n                        // save original delegate for compare to check duplicate\n                        task.originalDelegate = delegate;\n                    }\n                    if (!prepend) {\n                        existingTasks.push(task);\n                    }\n                    else {\n                        existingTasks.unshift(task);\n                    }\n                    if (returnTarget) {\n                        return target;\n                    }\n                };\n            };\n            proto[ADD_EVENT_LISTENER] = makeAddListener(nativeAddEventListener, ADD_EVENT_LISTENER_SOURCE, customSchedule, customCancel, returnTarget);\n            if (nativePrependEventListener) {\n                proto[PREPEND_EVENT_LISTENER] = makeAddListener(nativePrependEventListener, PREPEND_EVENT_LISTENER_SOURCE, customSchedulePrepend, customCancel, returnTarget, true);\n            }\n            proto[REMOVE_EVENT_LISTENER] = function () {\n                const target = this || _global;\n                let eventName = arguments[0];\n                if (patchOptions && patchOptions.transferEventName) {\n                    eventName = patchOptions.transferEventName(eventName);\n                }\n                const options = arguments[2];\n                const capture = !options ? false : typeof options === 'boolean' ? true : options.capture;\n                const delegate = arguments[1];\n                if (!delegate) {\n                    return nativeRemoveEventListener.apply(this, arguments);\n                }\n                if (validateHandler &&\n                    !validateHandler(nativeRemoveEventListener, delegate, target, arguments)) {\n                    return;\n                }\n                const symbolEventNames = zoneSymbolEventNames$1[eventName];\n                let symbolEventName;\n                if (symbolEventNames) {\n                    symbolEventName = symbolEventNames[capture ? TRUE_STR : FALSE_STR];\n                }\n                const existingTasks = symbolEventName && target[symbolEventName];\n                if (existingTasks) {\n                    for (let i = 0; i < existingTasks.length; i++) {\n                        const existingTask = existingTasks[i];\n                        if (compare(existingTask, delegate)) {\n                            existingTasks.splice(i, 1);\n                            // set isRemoved to data for faster invokeTask check\n                            existingTask.isRemoved = true;\n                            if (existingTasks.length === 0) {\n                                // all tasks for the eventName + capture have gone,\n                                // remove globalZoneAwareCallback and remove the task cache from target\n                                existingTask.allRemoved = true;\n                                target[symbolEventName] = null;\n                                // in the target, we have an event listener which is added by on_property\n                                // such as target.onclick = function() {}, so we need to clear this internal\n                                // property too if all delegates all removed\n                                if (typeof eventName === 'string') {\n                                    const onPropertySymbol = ZONE_SYMBOL_PREFIX + 'ON_PROPERTY' + eventName;\n                                    target[onPropertySymbol] = null;\n                                }\n                            }\n                            existingTask.zone.cancelTask(existingTask);\n                            if (returnTarget) {\n                                return target;\n                            }\n                            return;\n                        }\n                    }\n                }\n                // issue 930, didn't find the event name or callback\n                // from zone kept existingTasks, the callback maybe\n                // added outside of zone, we need to call native removeEventListener\n                // to try to remove it.\n                return nativeRemoveEventListener.apply(this, arguments);\n            };\n            proto[LISTENERS_EVENT_LISTENER] = function () {\n                const target = this || _global;\n                let eventName = arguments[0];\n                if (patchOptions && patchOptions.transferEventName) {\n                    eventName = patchOptions.transferEventName(eventName);\n                }\n                const listeners = [];\n                const tasks = findEventTasks(target, eventNameToString ? eventNameToString(eventName) : eventName);\n                for (let i = 0; i < tasks.length; i++) {\n                    const task = tasks[i];\n                    let delegate = task.originalDelegate ? task.originalDelegate : task.callback;\n                    listeners.push(delegate);\n                }\n                return listeners;\n            };\n            proto[REMOVE_ALL_LISTENERS_EVENT_LISTENER] = function () {\n                const target = this || _global;\n                let eventName = arguments[0];\n                if (!eventName) {\n                    const keys = Object.keys(target);\n                    for (let i = 0; i < keys.length; i++) {\n                        const prop = keys[i];\n                        const match = EVENT_NAME_SYMBOL_REGX.exec(prop);\n                        let evtName = match && match[1];\n                        // in nodejs EventEmitter, removeListener event is\n                        // used for monitoring the removeListener call,\n                        // so just keep removeListener eventListener until\n                        // all other eventListeners are removed\n                        if (evtName && evtName !== 'removeListener') {\n                            this[REMOVE_ALL_LISTENERS_EVENT_LISTENER].call(this, evtName);\n                        }\n                    }\n                    // remove removeListener listener finally\n                    this[REMOVE_ALL_LISTENERS_EVENT_LISTENER].call(this, 'removeListener');\n                }\n                else {\n                    if (patchOptions && patchOptions.transferEventName) {\n                        eventName = patchOptions.transferEventName(eventName);\n                    }\n                    const symbolEventNames = zoneSymbolEventNames$1[eventName];\n                    if (symbolEventNames) {\n                        const symbolEventName = symbolEventNames[FALSE_STR];\n                        const symbolCaptureEventName = symbolEventNames[TRUE_STR];\n                        const tasks = target[symbolEventName];\n                        const captureTasks = target[symbolCaptureEventName];\n                        if (tasks) {\n                            const removeTasks = tasks.slice();\n                            for (let i = 0; i < removeTasks.length; i++) {\n                                const task = removeTasks[i];\n                                let delegate = task.originalDelegate ? task.originalDelegate : task.callback;\n                                this[REMOVE_EVENT_LISTENER].call(this, eventName, delegate, task.options);\n                            }\n                        }\n                        if (captureTasks) {\n                            const removeTasks = captureTasks.slice();\n                            for (let i = 0; i < removeTasks.length; i++) {\n                                const task = removeTasks[i];\n                                let delegate = task.originalDelegate ? task.originalDelegate : task.callback;\n                                this[REMOVE_EVENT_LISTENER].call(this, eventName, delegate, task.options);\n                            }\n                        }\n                    }\n                }\n                if (returnTarget) {\n                    return this;\n                }\n            };\n            // for native toString patch\n            attachOriginToPatched(proto[ADD_EVENT_LISTENER], nativeAddEventListener);\n            attachOriginToPatched(proto[REMOVE_EVENT_LISTENER], nativeRemoveEventListener);\n            if (nativeRemoveAllListeners) {\n                attachOriginToPatched(proto[REMOVE_ALL_LISTENERS_EVENT_LISTENER], nativeRemoveAllListeners);\n            }\n            if (nativeListeners) {\n                attachOriginToPatched(proto[LISTENERS_EVENT_LISTENER], nativeListeners);\n            }\n            return true;\n        }\n        let results = [];\n        for (let i = 0; i < apis.length; i++) {\n            results[i] = patchEventTargetMethods(apis[i], patchOptions);\n        }\n        return results;\n    }\n    function findEventTasks(target, eventName) {\n        if (!eventName) {\n            const foundTasks = [];\n            for (let prop in target) {\n                const match = EVENT_NAME_SYMBOL_REGX.exec(prop);\n                let evtName = match && match[1];\n                if (evtName && (!eventName || evtName === eventName)) {\n                    const tasks = target[prop];\n                    if (tasks) {\n                        for (let i = 0; i < tasks.length; i++) {\n                            foundTasks.push(tasks[i]);\n                        }\n                    }\n                }\n            }\n            return foundTasks;\n        }\n        let symbolEventName = zoneSymbolEventNames$1[eventName];\n        if (!symbolEventName) {\n            prepareEventNames(eventName);\n            symbolEventName = zoneSymbolEventNames$1[eventName];\n        }\n        const captureFalseTasks = target[symbolEventName[FALSE_STR]];\n        const captureTrueTasks = target[symbolEventName[TRUE_STR]];\n        if (!captureFalseTasks) {\n            return captureTrueTasks ? captureTrueTasks.slice() : [];\n        }\n        else {\n            return captureTrueTasks ? captureFalseTasks.concat(captureTrueTasks) :\n                captureFalseTasks.slice();\n        }\n    }\n    function patchEventPrototype(global, api) {\n        const Event = global['Event'];\n        if (Event && Event.prototype) {\n            api.patchMethod(Event.prototype, 'stopImmediatePropagation', (delegate) => function (self, args) {\n                self[IMMEDIATE_PROPAGATION_SYMBOL] = true;\n                // we need to call the native stopImmediatePropagation\n                // in case in some hybrid application, some part of\n                // application will be controlled by zone, some are not\n                delegate && delegate.apply(self, args);\n            });\n        }\n    }\n\n    /**\n     * @license\n     * Copyright Google LLC All Rights Reserved.\n     *\n     * Use of this source code is governed by an MIT-style license that can be\n     * found in the LICENSE file at https://angular.io/license\n     */\n    function patchCallbacks(api, target, targetName, method, callbacks) {\n        const symbol = Zone.__symbol__(method);\n        if (target[symbol]) {\n            return;\n        }\n        const nativeDelegate = target[symbol] = target[method];\n        target[method] = function (name, opts, options) {\n            if (opts && opts.prototype) {\n                callbacks.forEach(function (callback) {\n                    const source = `${targetName}.${method}::` + callback;\n                    const prototype = opts.prototype;\n                    if (prototype.hasOwnProperty(callback)) {\n                        const descriptor = api.ObjectGetOwnPropertyDescriptor(prototype, callback);\n                        if (descriptor && descriptor.value) {\n                            descriptor.value = api.wrapWithCurrentZone(descriptor.value, source);\n                            api._redefineProperty(opts.prototype, callback, descriptor);\n                        }\n                        else if (prototype[callback]) {\n                            prototype[callback] = api.wrapWithCurrentZone(prototype[callback], source);\n                        }\n                    }\n                    else if (prototype[callback]) {\n                        prototype[callback] = api.wrapWithCurrentZone(prototype[callback], source);\n                    }\n                });\n            }\n            return nativeDelegate.call(target, name, opts, options);\n        };\n        api.attachOriginToPatched(target[method], nativeDelegate);\n    }\n\n    /**\n     * @license\n     * Copyright Google LLC All Rights Reserved.\n     *\n     * Use of this source code is governed by an MIT-style license that can be\n     * found in the LICENSE file at https://angular.io/license\n     */\n    const globalEventHandlersEventNames = [\n        'abort',\n        'animationcancel',\n        'animationend',\n        'animationiteration',\n        'auxclick',\n        'beforeinput',\n        'blur',\n        'cancel',\n        'canplay',\n        'canplaythrough',\n        'change',\n        'compositionstart',\n        'compositionupdate',\n        'compositionend',\n        'cuechange',\n        'click',\n        'close',\n        'contextmenu',\n        'curechange',\n        'dblclick',\n        'drag',\n        'dragend',\n        'dragenter',\n        'dragexit',\n        'dragleave',\n        'dragover',\n        'drop',\n        'durationchange',\n        'emptied',\n        'ended',\n        'error',\n        'focus',\n        'focusin',\n        'focusout',\n        'gotpointercapture',\n        'input',\n        'invalid',\n        'keydown',\n        'keypress',\n        'keyup',\n        'load',\n        'loadstart',\n        'loadeddata',\n        'loadedmetadata',\n        'lostpointercapture',\n        'mousedown',\n        'mouseenter',\n        'mouseleave',\n        'mousemove',\n        'mouseout',\n        'mouseover',\n        'mouseup',\n        'mousewheel',\n        'orientationchange',\n        'pause',\n        'play',\n        'playing',\n        'pointercancel',\n        'pointerdown',\n        'pointerenter',\n        'pointerleave',\n        'pointerlockchange',\n        'mozpointerlockchange',\n        'webkitpointerlockerchange',\n        'pointerlockerror',\n        'mozpointerlockerror',\n        'webkitpointerlockerror',\n        'pointermove',\n        'pointout',\n        'pointerover',\n        'pointerup',\n        'progress',\n        'ratechange',\n        'reset',\n        'resize',\n        'scroll',\n        'seeked',\n        'seeking',\n        'select',\n        'selectionchange',\n        'selectstart',\n        'show',\n        'sort',\n        'stalled',\n        'submit',\n        'suspend',\n        'timeupdate',\n        'volumechange',\n        'touchcancel',\n        'touchmove',\n        'touchstart',\n        'touchend',\n        'transitioncancel',\n        'transitionend',\n        'waiting',\n        'wheel'\n    ];\n    const documentEventNames = [\n        'afterscriptexecute', 'beforescriptexecute', 'DOMContentLoaded', 'freeze', 'fullscreenchange',\n        'mozfullscreenchange', 'webkitfullscreenchange', 'msfullscreenchange', 'fullscreenerror',\n        'mozfullscreenerror', 'webkitfullscreenerror', 'msfullscreenerror', 'readystatechange',\n        'visibilitychange', 'resume'\n    ];\n    const windowEventNames = [\n        'absolutedeviceorientation',\n        'afterinput',\n        'afterprint',\n        'appinstalled',\n        'beforeinstallprompt',\n        'beforeprint',\n        'beforeunload',\n        'devicelight',\n        'devicemotion',\n        'deviceorientation',\n        'deviceorientationabsolute',\n        'deviceproximity',\n        'hashchange',\n        'languagechange',\n        'message',\n        'mozbeforepaint',\n        'offline',\n        'online',\n        'paint',\n        'pageshow',\n        'pagehide',\n        'popstate',\n        'rejectionhandled',\n        'storage',\n        'unhandledrejection',\n        'unload',\n        'userproximity',\n        'vrdisplayconnected',\n        'vrdisplaydisconnected',\n        'vrdisplaypresentchange'\n    ];\n    const htmlElementEventNames = [\n        'beforecopy', 'beforecut', 'beforepaste', 'copy', 'cut', 'paste', 'dragstart', 'loadend',\n        'animationstart', 'search', 'transitionrun', 'transitionstart', 'webkitanimationend',\n        'webkitanimationiteration', 'webkitanimationstart', 'webkittransitionend'\n    ];\n    const mediaElementEventNames = ['encrypted', 'waitingforkey', 'msneedkey', 'mozinterruptbegin', 'mozinterruptend'];\n    const ieElementEventNames = [\n        'activate',\n        'afterupdate',\n        'ariarequest',\n        'beforeactivate',\n        'beforedeactivate',\n        'beforeeditfocus',\n        'beforeupdate',\n        'cellchange',\n        'controlselect',\n        'dataavailable',\n        'datasetchanged',\n        'datasetcomplete',\n        'errorupdate',\n        'filterchange',\n        'layoutcomplete',\n        'losecapture',\n        'move',\n        'moveend',\n        'movestart',\n        'propertychange',\n        'resizeend',\n        'resizestart',\n        'rowenter',\n        'rowexit',\n        'rowsdelete',\n        'rowsinserted',\n        'command',\n        'compassneedscalibration',\n        'deactivate',\n        'help',\n        'mscontentzoom',\n        'msmanipulationstatechanged',\n        'msgesturechange',\n        'msgesturedoubletap',\n        'msgestureend',\n        'msgesturehold',\n        'msgesturestart',\n        'msgesturetap',\n        'msgotpointercapture',\n        'msinertiastart',\n        'mslostpointercapture',\n        'mspointercancel',\n        'mspointerdown',\n        'mspointerenter',\n        'mspointerhover',\n        'mspointerleave',\n        'mspointermove',\n        'mspointerout',\n        'mspointerover',\n        'mspointerup',\n        'pointerout',\n        'mssitemodejumplistitemremoved',\n        'msthumbnailclick',\n        'stop',\n        'storagecommit'\n    ];\n    const webglEventNames = ['webglcontextrestored', 'webglcontextlost', 'webglcontextcreationerror'];\n    const formEventNames = ['autocomplete', 'autocompleteerror'];\n    const detailEventNames = ['toggle'];\n    const frameEventNames = ['load'];\n    const frameSetEventNames = ['blur', 'error', 'focus', 'load', 'resize', 'scroll', 'messageerror'];\n    const marqueeEventNames = ['bounce', 'finish', 'start'];\n    const XMLHttpRequestEventNames = [\n        'loadstart', 'progress', 'abort', 'error', 'load', 'progress', 'timeout', 'loadend',\n        'readystatechange'\n    ];\n    const IDBIndexEventNames = ['upgradeneeded', 'complete', 'abort', 'success', 'error', 'blocked', 'versionchange', 'close'];\n    const websocketEventNames = ['close', 'error', 'open', 'message'];\n    const workerEventNames = ['error', 'message'];\n    const eventNames = globalEventHandlersEventNames.concat(webglEventNames, formEventNames, detailEventNames, documentEventNames, windowEventNames, htmlElementEventNames, ieElementEventNames);\n    function filterProperties(target, onProperties, ignoreProperties) {\n        if (!ignoreProperties || ignoreProperties.length === 0) {\n            return onProperties;\n        }\n        const tip = ignoreProperties.filter(ip => ip.target === target);\n        if (!tip || tip.length === 0) {\n            return onProperties;\n        }\n        const targetIgnoreProperties = tip[0].ignoreProperties;\n        return onProperties.filter(op => targetIgnoreProperties.indexOf(op) === -1);\n    }\n    function patchFilteredProperties(target, onProperties, ignoreProperties, prototype) {\n        // check whether target is available, sometimes target will be undefined\n        // because different browser or some 3rd party plugin.\n        if (!target) {\n            return;\n        }\n        const filteredProperties = filterProperties(target, onProperties, ignoreProperties);\n        patchOnProperties(target, filteredProperties, prototype);\n    }\n    function propertyDescriptorPatch(api, _global) {\n        if (isNode && !isMix) {\n            return;\n        }\n        if (Zone[api.symbol('patchEvents')]) {\n            // events are already been patched by legacy patch.\n            return;\n        }\n        const supportsWebSocket = typeof WebSocket !== 'undefined';\n        const ignoreProperties = _global['__Zone_ignore_on_properties'];\n        // for browsers that we can patch the descriptor:  Chrome & Firefox\n        if (isBrowser) {\n            const internalWindow = window;\n            const ignoreErrorProperties = isIE() ? [{ target: internalWindow, ignoreProperties: ['error'] }] : [];\n            // in IE/Edge, onProp not exist in window object, but in WindowPrototype\n            // so we need to pass WindowPrototype to check onProp exist or not\n            patchFilteredProperties(internalWindow, eventNames.concat(['messageerror']), ignoreProperties ? ignoreProperties.concat(ignoreErrorProperties) : ignoreProperties, ObjectGetPrototypeOf(internalWindow));\n            patchFilteredProperties(Document.prototype, eventNames, ignoreProperties);\n            if (typeof internalWindow['SVGElement'] !== 'undefined') {\n                patchFilteredProperties(internalWindow['SVGElement'].prototype, eventNames, ignoreProperties);\n            }\n            patchFilteredProperties(Element.prototype, eventNames, ignoreProperties);\n            patchFilteredProperties(HTMLElement.prototype, eventNames, ignoreProperties);\n            patchFilteredProperties(HTMLMediaElement.prototype, mediaElementEventNames, ignoreProperties);\n            patchFilteredProperties(HTMLFrameSetElement.prototype, windowEventNames.concat(frameSetEventNames), ignoreProperties);\n            patchFilteredProperties(HTMLBodyElement.prototype, windowEventNames.concat(frameSetEventNames), ignoreProperties);\n            patchFilteredProperties(HTMLFrameElement.prototype, frameEventNames, ignoreProperties);\n            patchFilteredProperties(HTMLIFrameElement.prototype, frameEventNames, ignoreProperties);\n            const HTMLMarqueeElement = internalWindow['HTMLMarqueeElement'];\n            if (HTMLMarqueeElement) {\n                patchFilteredProperties(HTMLMarqueeElement.prototype, marqueeEventNames, ignoreProperties);\n            }\n            const Worker = internalWindow['Worker'];\n            if (Worker) {\n                patchFilteredProperties(Worker.prototype, workerEventNames, ignoreProperties);\n            }\n        }\n        const XMLHttpRequest = _global['XMLHttpRequest'];\n        if (XMLHttpRequest) {\n            // XMLHttpRequest is not available in ServiceWorker, so we need to check here\n            patchFilteredProperties(XMLHttpRequest.prototype, XMLHttpRequestEventNames, ignoreProperties);\n        }\n        const XMLHttpRequestEventTarget = _global['XMLHttpRequestEventTarget'];\n        if (XMLHttpRequestEventTarget) {\n            patchFilteredProperties(XMLHttpRequestEventTarget && XMLHttpRequestEventTarget.prototype, XMLHttpRequestEventNames, ignoreProperties);\n        }\n        if (typeof IDBIndex !== 'undefined') {\n            patchFilteredProperties(IDBIndex.prototype, IDBIndexEventNames, ignoreProperties);\n            patchFilteredProperties(IDBRequest.prototype, IDBIndexEventNames, ignoreProperties);\n            patchFilteredProperties(IDBOpenDBRequest.prototype, IDBIndexEventNames, ignoreProperties);\n            patchFilteredProperties(IDBDatabase.prototype, IDBIndexEventNames, ignoreProperties);\n            patchFilteredProperties(IDBTransaction.prototype, IDBIndexEventNames, ignoreProperties);\n            patchFilteredProperties(IDBCursor.prototype, IDBIndexEventNames, ignoreProperties);\n        }\n        if (supportsWebSocket) {\n            patchFilteredProperties(WebSocket.prototype, websocketEventNames, ignoreProperties);\n        }\n    }\n\n    /**\n     * @license\n     * Copyright Google LLC All Rights Reserved.\n     *\n     * Use of this source code is governed by an MIT-style license that can be\n     * found in the LICENSE file at https://angular.io/license\n     */\n    Zone.__load_patch('util', (global, Zone, api) => {\n        api.patchOnProperties = patchOnProperties;\n        api.patchMethod = patchMethod;\n        api.bindArguments = bindArguments;\n        api.patchMacroTask = patchMacroTask;\n        // In earlier version of zone.js (<0.9.0), we use env name `__zone_symbol__BLACK_LISTED_EVENTS` to\n        // define which events will not be patched by `Zone.js`.\n        // In newer version (>=0.9.0), we change the env name to `__zone_symbol__UNPATCHED_EVENTS` to keep\n        // the name consistent with angular repo.\n        // The  `__zone_symbol__BLACK_LISTED_EVENTS` is deprecated, but it is still be supported for\n        // backwards compatibility.\n        const SYMBOL_BLACK_LISTED_EVENTS = Zone.__symbol__('BLACK_LISTED_EVENTS');\n        const SYMBOL_UNPATCHED_EVENTS = Zone.__symbol__('UNPATCHED_EVENTS');\n        if (global[SYMBOL_UNPATCHED_EVENTS]) {\n            global[SYMBOL_BLACK_LISTED_EVENTS] = global[SYMBOL_UNPATCHED_EVENTS];\n        }\n        if (global[SYMBOL_BLACK_LISTED_EVENTS]) {\n            Zone[SYMBOL_BLACK_LISTED_EVENTS] = Zone[SYMBOL_UNPATCHED_EVENTS] =\n                global[SYMBOL_BLACK_LISTED_EVENTS];\n        }\n        api.patchEventPrototype = patchEventPrototype;\n        api.patchEventTarget = patchEventTarget;\n        api.isIEOrEdge = isIEOrEdge;\n        api.ObjectDefineProperty = ObjectDefineProperty;\n        api.ObjectGetOwnPropertyDescriptor = ObjectGetOwnPropertyDescriptor;\n        api.ObjectCreate = ObjectCreate;\n        api.ArraySlice = ArraySlice;\n        api.patchClass = patchClass;\n        api.wrapWithCurrentZone = wrapWithCurrentZone;\n        api.filterProperties = filterProperties;\n        api.attachOriginToPatched = attachOriginToPatched;\n        api._redefineProperty = Object.defineProperty;\n        api.patchCallbacks = patchCallbacks;\n        api.getGlobalObjects = () => ({\n            globalSources,\n            zoneSymbolEventNames: zoneSymbolEventNames$1,\n            eventNames,\n            isBrowser,\n            isMix,\n            isNode,\n            TRUE_STR,\n            FALSE_STR,\n            ZONE_SYMBOL_PREFIX,\n            ADD_EVENT_LISTENER_STR,\n            REMOVE_EVENT_LISTENER_STR\n        });\n    });\n\n    /**\n     * @license\n     * Copyright Google LLC All Rights Reserved.\n     *\n     * Use of this source code is governed by an MIT-style license that can be\n     * found in the LICENSE file at https://angular.io/license\n     */\n    const taskSymbol = zoneSymbol('zoneTask');\n    function patchTimer(window, setName, cancelName, nameSuffix) {\n        let setNative = null;\n        let clearNative = null;\n        setName += nameSuffix;\n        cancelName += nameSuffix;\n        const tasksByHandleId = {};\n        function scheduleTask(task) {\n            const data = task.data;\n            function timer() {\n                try {\n                    task.invoke.apply(this, arguments);\n                }\n                finally {\n                    // issue-934, task will be cancelled\n                    // even it is a periodic task such as\n                    // setInterval\n                    if (!(task.data && task.data.isPeriodic)) {\n                        if (typeof data.handleId === 'number') {\n                            // in non-nodejs env, we remove timerId\n                            // from local cache\n                            delete tasksByHandleId[data.handleId];\n                        }\n                        else if (data.handleId) {\n                            // Node returns complex objects as handleIds\n                            // we remove task reference from timer object\n                            data.handleId[taskSymbol] = null;\n                        }\n                    }\n                }\n            }\n            data.args[0] = timer;\n            data.handleId = setNative.apply(window, data.args);\n            return task;\n        }\n        function clearTask(task) {\n            return clearNative.call(window, task.data.handleId);\n        }\n        setNative =\n            patchMethod(window, setName, (delegate) => function (self, args) {\n                if (typeof args[0] === 'function') {\n                    const options = {\n                        isPeriodic: nameSuffix === 'Interval',\n                        delay: (nameSuffix === 'Timeout' || nameSuffix === 'Interval') ? args[1] || 0 :\n                            undefined,\n                        args: args\n                    };\n                    const task = scheduleMacroTaskWithCurrentZone(setName, args[0], options, scheduleTask, clearTask);\n                    if (!task) {\n                        return task;\n                    }\n                    // Node.js must additionally support the ref and unref functions.\n                    const handle = task.data.handleId;\n                    if (typeof handle === 'number') {\n                        // for non nodejs env, we save handleId: task\n                        // mapping in local cache for clearTimeout\n                        tasksByHandleId[handle] = task;\n                    }\n                    else if (handle) {\n                        // for nodejs env, we save task\n                        // reference in timerId Object for clearTimeout\n                        handle[taskSymbol] = task;\n                    }\n                    // check whether handle is null, because some polyfill or browser\n                    // may return undefined from setTimeout/setInterval/setImmediate/requestAnimationFrame\n                    if (handle && handle.ref && handle.unref && typeof handle.ref === 'function' &&\n                        typeof handle.unref === 'function') {\n                        task.ref = handle.ref.bind(handle);\n                        task.unref = handle.unref.bind(handle);\n                    }\n                    if (typeof handle === 'number' || handle) {\n                        return handle;\n                    }\n                    return task;\n                }\n                else {\n                    // cause an error by calling it directly.\n                    return delegate.apply(window, args);\n                }\n            });\n        clearNative =\n            patchMethod(window, cancelName, (delegate) => function (self, args) {\n                const id = args[0];\n                let task;\n                if (typeof id === 'number') {\n                    // non nodejs env.\n                    task = tasksByHandleId[id];\n                }\n                else {\n                    // nodejs env.\n                    task = id && id[taskSymbol];\n                    // other environments.\n                    if (!task) {\n                        task = id;\n                    }\n                }\n                if (task && typeof task.type === 'string') {\n                    if (task.state !== 'notScheduled' &&\n                        (task.cancelFn && task.data.isPeriodic || task.runCount === 0)) {\n                        if (typeof id === 'number') {\n                            delete tasksByHandleId[id];\n                        }\n                        else if (id) {\n                            id[taskSymbol] = null;\n                        }\n                        // Do not cancel already canceled functions\n                        task.zone.cancelTask(task);\n                    }\n                }\n                else {\n                    // cause an error by calling it directly.\n                    delegate.apply(window, args);\n                }\n            });\n    }\n\n    /**\n     * @license\n     * Copyright Google LLC All Rights Reserved.\n     *\n     * Use of this source code is governed by an MIT-style license that can be\n     * found in the LICENSE file at https://angular.io/license\n     */\n    function patchCustomElements(_global, api) {\n        const { isBrowser, isMix } = api.getGlobalObjects();\n        if ((!isBrowser && !isMix) || !_global['customElements'] || !('customElements' in _global)) {\n            return;\n        }\n        const callbacks = ['connectedCallback', 'disconnectedCallback', 'adoptedCallback', 'attributeChangedCallback'];\n        api.patchCallbacks(api, _global.customElements, 'customElements', 'define', callbacks);\n    }\n\n    /**\n     * @license\n     * Copyright Google LLC All Rights Reserved.\n     *\n     * Use of this source code is governed by an MIT-style license that can be\n     * found in the LICENSE file at https://angular.io/license\n     */\n    function eventTargetPatch(_global, api) {\n        if (Zone[api.symbol('patchEventTarget')]) {\n            // EventTarget is already patched.\n            return;\n        }\n        const { eventNames, zoneSymbolEventNames, TRUE_STR, FALSE_STR, ZONE_SYMBOL_PREFIX } = api.getGlobalObjects();\n        //  predefine all __zone_symbol__ + eventName + true/false string\n        for (let i = 0; i < eventNames.length; i++) {\n            const eventName = eventNames[i];\n            const falseEventName = eventName + FALSE_STR;\n            const trueEventName = eventName + TRUE_STR;\n            const symbol = ZONE_SYMBOL_PREFIX + falseEventName;\n            const symbolCapture = ZONE_SYMBOL_PREFIX + trueEventName;\n            zoneSymbolEventNames[eventName] = {};\n            zoneSymbolEventNames[eventName][FALSE_STR] = symbol;\n            zoneSymbolEventNames[eventName][TRUE_STR] = symbolCapture;\n        }\n        const EVENT_TARGET = _global['EventTarget'];\n        if (!EVENT_TARGET || !EVENT_TARGET.prototype) {\n            return;\n        }\n        api.patchEventTarget(_global, [EVENT_TARGET && EVENT_TARGET.prototype]);\n        return true;\n    }\n    function patchEvent(global, api) {\n        api.patchEventPrototype(global, api);\n    }\n\n    /**\n     * @license\n     * Copyright Google LLC All Rights Reserved.\n     *\n     * Use of this source code is governed by an MIT-style license that can be\n     * found in the LICENSE file at https://angular.io/license\n     */\n    Zone.__load_patch('legacy', (global) => {\n        const legacyPatch = global[Zone.__symbol__('legacyPatch')];\n        if (legacyPatch) {\n            legacyPatch();\n        }\n    });\n    Zone.__load_patch('timers', (global) => {\n        const set = 'set';\n        const clear = 'clear';\n        patchTimer(global, set, clear, 'Timeout');\n        patchTimer(global, set, clear, 'Interval');\n        patchTimer(global, set, clear, 'Immediate');\n    });\n    Zone.__load_patch('requestAnimationFrame', (global) => {\n        patchTimer(global, 'request', 'cancel', 'AnimationFrame');\n        patchTimer(global, 'mozRequest', 'mozCancel', 'AnimationFrame');\n        patchTimer(global, 'webkitRequest', 'webkitCancel', 'AnimationFrame');\n    });\n    Zone.__load_patch('blocking', (global, Zone) => {\n        const blockingMethods = ['alert', 'prompt', 'confirm'];\n        for (let i = 0; i < blockingMethods.length; i++) {\n            const name = blockingMethods[i];\n            patchMethod(global, name, (delegate, symbol, name) => {\n                return function (s, args) {\n                    return Zone.current.run(delegate, global, args, name);\n                };\n            });\n        }\n    });\n    Zone.__load_patch('EventTarget', (global, Zone, api) => {\n        patchEvent(global, api);\n        eventTargetPatch(global, api);\n        // patch XMLHttpRequestEventTarget's addEventListener/removeEventListener\n        const XMLHttpRequestEventTarget = global['XMLHttpRequestEventTarget'];\n        if (XMLHttpRequestEventTarget && XMLHttpRequestEventTarget.prototype) {\n            api.patchEventTarget(global, [XMLHttpRequestEventTarget.prototype]);\n        }\n    });\n    Zone.__load_patch('MutationObserver', (global, Zone, api) => {\n        patchClass('MutationObserver');\n        patchClass('WebKitMutationObserver');\n    });\n    Zone.__load_patch('IntersectionObserver', (global, Zone, api) => {\n        patchClass('IntersectionObserver');\n    });\n    Zone.__load_patch('FileReader', (global, Zone, api) => {\n        patchClass('FileReader');\n    });\n    Zone.__load_patch('on_property', (global, Zone, api) => {\n        propertyDescriptorPatch(api, global);\n    });\n    Zone.__load_patch('customElements', (global, Zone, api) => {\n        patchCustomElements(global, api);\n    });\n    Zone.__load_patch('XHR', (global, Zone) => {\n        // Treat XMLHttpRequest as a macrotask.\n        patchXHR(global);\n        const XHR_TASK = zoneSymbol('xhrTask');\n        const XHR_SYNC = zoneSymbol('xhrSync');\n        const XHR_LISTENER = zoneSymbol('xhrListener');\n        const XHR_SCHEDULED = zoneSymbol('xhrScheduled');\n        const XHR_URL = zoneSymbol('xhrURL');\n        const XHR_ERROR_BEFORE_SCHEDULED = zoneSymbol('xhrErrorBeforeScheduled');\n        function patchXHR(window) {\n            const XMLHttpRequest = window['XMLHttpRequest'];\n            if (!XMLHttpRequest) {\n                // XMLHttpRequest is not available in service worker\n                return;\n            }\n            const XMLHttpRequestPrototype = XMLHttpRequest.prototype;\n            function findPendingTask(target) {\n                return target[XHR_TASK];\n            }\n            let oriAddListener = XMLHttpRequestPrototype[ZONE_SYMBOL_ADD_EVENT_LISTENER];\n            let oriRemoveListener = XMLHttpRequestPrototype[ZONE_SYMBOL_REMOVE_EVENT_LISTENER];\n            if (!oriAddListener) {\n                const XMLHttpRequestEventTarget = window['XMLHttpRequestEventTarget'];\n                if (XMLHttpRequestEventTarget) {\n                    const XMLHttpRequestEventTargetPrototype = XMLHttpRequestEventTarget.prototype;\n                    oriAddListener = XMLHttpRequestEventTargetPrototype[ZONE_SYMBOL_ADD_EVENT_LISTENER];\n                    oriRemoveListener = XMLHttpRequestEventTargetPrototype[ZONE_SYMBOL_REMOVE_EVENT_LISTENER];\n                }\n            }\n            const READY_STATE_CHANGE = 'readystatechange';\n            const SCHEDULED = 'scheduled';\n            function scheduleTask(task) {\n                const data = task.data;\n                const target = data.target;\n                target[XHR_SCHEDULED] = false;\n                target[XHR_ERROR_BEFORE_SCHEDULED] = false;\n                // remove existing event listener\n                const listener = target[XHR_LISTENER];\n                if (!oriAddListener) {\n                    oriAddListener = target[ZONE_SYMBOL_ADD_EVENT_LISTENER];\n                    oriRemoveListener = target[ZONE_SYMBOL_REMOVE_EVENT_LISTENER];\n                }\n                if (listener) {\n                    oriRemoveListener.call(target, READY_STATE_CHANGE, listener);\n                }\n                const newListener = target[XHR_LISTENER] = () => {\n                    if (target.readyState === target.DONE) {\n                        // sometimes on some browsers XMLHttpRequest will fire onreadystatechange with\n                        // readyState=4 multiple times, so we need to check task state here\n                        if (!data.aborted && target[XHR_SCHEDULED] && task.state === SCHEDULED) {\n                            // check whether the xhr has registered onload listener\n                            // if that is the case, the task should invoke after all\n                            // onload listeners finish.\n                            const loadTasks = target[Zone.__symbol__('loadfalse')];\n                            if (loadTasks && loadTasks.length > 0) {\n                                const oriInvoke = task.invoke;\n                                task.invoke = function () {\n                                    // need to load the tasks again, because in other\n                                    // load listener, they may remove themselves\n                                    const loadTasks = target[Zone.__symbol__('loadfalse')];\n                                    for (let i = 0; i < loadTasks.length; i++) {\n                                        if (loadTasks[i] === task) {\n                                            loadTasks.splice(i, 1);\n                                        }\n                                    }\n                                    if (!data.aborted && task.state === SCHEDULED) {\n                                        oriInvoke.call(task);\n                                    }\n                                };\n                                loadTasks.push(task);\n                            }\n                            else {\n                                task.invoke();\n                            }\n                        }\n                        else if (!data.aborted && target[XHR_SCHEDULED] === false) {\n                            // error occurs when xhr.send()\n                            target[XHR_ERROR_BEFORE_SCHEDULED] = true;\n                        }\n                    }\n                };\n                oriAddListener.call(target, READY_STATE_CHANGE, newListener);\n                const storedTask = target[XHR_TASK];\n                if (!storedTask) {\n                    target[XHR_TASK] = task;\n                }\n                sendNative.apply(target, data.args);\n                target[XHR_SCHEDULED] = true;\n                return task;\n            }\n            function placeholderCallback() { }\n            function clearTask(task) {\n                const data = task.data;\n                // Note - ideally, we would call data.target.removeEventListener here, but it's too late\n                // to prevent it from firing. So instead, we store info for the event listener.\n                data.aborted = true;\n                return abortNative.apply(data.target, data.args);\n            }\n            const openNative = patchMethod(XMLHttpRequestPrototype, 'open', () => function (self, args) {\n                self[XHR_SYNC] = args[2] == false;\n                self[XHR_URL] = args[1];\n                return openNative.apply(self, args);\n            });\n            const XMLHTTPREQUEST_SOURCE = 'XMLHttpRequest.send';\n            const fetchTaskAborting = zoneSymbol('fetchTaskAborting');\n            const fetchTaskScheduling = zoneSymbol('fetchTaskScheduling');\n            const sendNative = patchMethod(XMLHttpRequestPrototype, 'send', () => function (self, args) {\n                if (Zone.current[fetchTaskScheduling] === true) {\n                    // a fetch is scheduling, so we are using xhr to polyfill fetch\n                    // and because we already schedule macroTask for fetch, we should\n                    // not schedule a macroTask for xhr again\n                    return sendNative.apply(self, args);\n                }\n                if (self[XHR_SYNC]) {\n                    // if the XHR is sync there is no task to schedule, just execute the code.\n                    return sendNative.apply(self, args);\n                }\n                else {\n                    const options = { target: self, url: self[XHR_URL], isPeriodic: false, args: args, aborted: false };\n                    const task = scheduleMacroTaskWithCurrentZone(XMLHTTPREQUEST_SOURCE, placeholderCallback, options, scheduleTask, clearTask);\n                    if (self && self[XHR_ERROR_BEFORE_SCHEDULED] === true && !options.aborted &&\n                        task.state === SCHEDULED) {\n                        // xhr request throw error when send\n                        // we should invoke task instead of leaving a scheduled\n                        // pending macroTask\n                        task.invoke();\n                    }\n                }\n            });\n            const abortNative = patchMethod(XMLHttpRequestPrototype, 'abort', () => function (self, args) {\n                const task = findPendingTask(self);\n                if (task && typeof task.type == 'string') {\n                    // If the XHR has already completed, do nothing.\n                    // If the XHR has already been aborted, do nothing.\n                    // Fix #569, call abort multiple times before done will cause\n                    // macroTask task count be negative number\n                    if (task.cancelFn == null || (task.data && task.data.aborted)) {\n                        return;\n                    }\n                    task.zone.cancelTask(task);\n                }\n                else if (Zone.current[fetchTaskAborting] === true) {\n                    // the abort is called from fetch polyfill, we need to call native abort of XHR.\n                    return abortNative.apply(self, args);\n                }\n                // Otherwise, we are trying to abort an XHR which has not yet been sent, so there is no\n                // task\n                // to cancel. Do nothing.\n            });\n        }\n    });\n    Zone.__load_patch('geolocation', (global) => {\n        /// GEO_LOCATION\n        if (global['navigator'] && global['navigator'].geolocation) {\n            patchPrototype(global['navigator'].geolocation, ['getCurrentPosition', 'watchPosition']);\n        }\n    });\n    Zone.__load_patch('PromiseRejectionEvent', (global, Zone) => {\n        // handle unhandled promise rejection\n        function findPromiseRejectionHandler(evtName) {\n            return function (e) {\n                const eventTasks = findEventTasks(global, evtName);\n                eventTasks.forEach(eventTask => {\n                    // windows has added unhandledrejection event listener\n                    // trigger the event listener\n                    const PromiseRejectionEvent = global['PromiseRejectionEvent'];\n                    if (PromiseRejectionEvent) {\n                        const evt = new PromiseRejectionEvent(evtName, { promise: e.promise, reason: e.rejection });\n                        eventTask.invoke(evt);\n                    }\n                });\n            };\n        }\n        if (global['PromiseRejectionEvent']) {\n            Zone[zoneSymbol('unhandledPromiseRejectionHandler')] =\n                findPromiseRejectionHandler('unhandledrejection');\n            Zone[zoneSymbol('rejectionHandledHandler')] =\n                findPromiseRejectionHandler('rejectionhandled');\n        }\n    });\n\n})));\n","function _iterableToArrayLimit(arr, i) {\n  if (typeof Symbol === \"undefined\" || !(Symbol.iterator in Object(arr))) return;\n  var _arr = [];\n  var _n = true;\n  var _d = false;\n  var _e = undefined;\n\n  try {\n    for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {\n      _arr.push(_s.value);\n\n      if (i && _arr.length === i) break;\n    }\n  } catch (err) {\n    _d = true;\n    _e = err;\n  } finally {\n    try {\n      if (!_n && _i[\"return\"] != null) _i[\"return\"]();\n    } finally {\n      if (_d) throw _e;\n    }\n  }\n\n  return _arr;\n}\n\nmodule.exports = _iterableToArrayLimit;","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.zip = rxjs_1.zip;\n//# sourceMappingURL=zip.js.map","import { Subscriber } from '../Subscriber';\nexport function isEmpty() {\n    return (source) => source.lift(new IsEmptyOperator());\n}\nclass IsEmptyOperator {\n    call(observer, source) {\n        return source.subscribe(new IsEmptySubscriber(observer));\n    }\n}\nclass IsEmptySubscriber extends Subscriber {\n    constructor(destination) {\n        super(destination);\n    }\n    notifyComplete(isEmpty) {\n        const destination = this.destination;\n        destination.next(isEmpty);\n        destination.complete();\n    }\n    _next(value) {\n        this.notifyComplete(false);\n    }\n    _complete() {\n        this.notifyComplete(true);\n    }\n}\n//# sourceMappingURL=isEmpty.js.map","import { identity } from './identity';\nexport function pipe(...fns) {\n    return pipeFromArray(fns);\n}\nexport function pipeFromArray(fns) {\n    if (fns.length === 0) {\n        return identity;\n    }\n    if (fns.length === 1) {\n        return fns[0];\n    }\n    return function piped(input) {\n        return fns.reduce((prev, fn) => fn(prev), input);\n    };\n}\n//# sourceMappingURL=pipe.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Applies an accumulator function over the source Observable where the\n * accumulator function itself returns an Observable, then each intermediate\n * Observable returned is merged into the output Observable.\n *\n * <span class=\"informal\">It's like {@link scan}, but the Observables returned\n * by the accumulator are merged into the outer Observable.</span>\n *\n * @example <caption>Count the number of click events</caption>\n * const click$ = Rx.Observable.fromEvent(document, 'click');\n * const one$ = click$.mapTo(1);\n * const seed = 0;\n * const count$ = one$.mergeScan((acc, one) => Rx.Observable.of(acc + one), seed);\n * count$.subscribe(x => console.log(x));\n *\n * // Results:\n * 1\n * 2\n * 3\n * 4\n * // ...and so on for each click\n *\n * @param {function(acc: R, value: T): Observable<R>} accumulator\n * The accumulator function called on each source value.\n * @param seed The initial accumulation value.\n * @param {number} [concurrent=Number.POSITIVE_INFINITY] Maximum number of\n * input Observables being subscribed to concurrently.\n * @return {Observable<R>} An observable of the accumulated values.\n * @method mergeScan\n * @owner Observable\n */\nfunction mergeScan(accumulator, seed, concurrent) {\n    if (concurrent === void 0) { concurrent = Number.POSITIVE_INFINITY; }\n    return operators_1.mergeScan(accumulator, seed, concurrent)(this);\n}\nexports.mergeScan = mergeScan;\n//# sourceMappingURL=mergeScan.js.map","import _typeof from \"../../helpers/esm/typeof\";\nimport assertThisInitialized from \"./assertThisInitialized\";\nexport default function _possibleConstructorReturn(self, call) {\n  if (call && (_typeof(call) === \"object\" || typeof call === \"function\")) {\n    return call;\n  }\n\n  return assertThisInitialized(self);\n}","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/* tslint:enable:max-line-length */\n/**\n * Emits a given value if the source Observable completes without emitting any\n * `next` value, otherwise mirrors the source Observable.\n *\n * <span class=\"informal\">If the source Observable turns out to be empty, then\n * this operator will emit a default value.</span>\n *\n * <img src=\"./img/defaultIfEmpty.png\" width=\"100%\">\n *\n * `defaultIfEmpty` emits the values emitted by the source Observable or a\n * specified default value if the source Observable is empty (completes without\n * having emitted any `next` value).\n *\n * @example <caption>If no clicks happen in 5 seconds, then emit \"no clicks\"</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var clicksBeforeFive = clicks.takeUntil(Rx.Observable.interval(5000));\n * var result = clicksBeforeFive.defaultIfEmpty('no clicks');\n * result.subscribe(x => console.log(x));\n *\n * @see {@link empty}\n * @see {@link last}\n *\n * @param {any} [defaultValue=null] The default value used if the source\n * Observable is empty.\n * @return {Observable} An Observable that emits either the specified\n * `defaultValue` if the source Observable emits no items, or the values emitted\n * by the source Observable.\n * @method defaultIfEmpty\n * @owner Observable\n */\nfunction defaultIfEmpty(defaultValue) {\n    if (defaultValue === void 0) { defaultValue = null; }\n    return operators_1.defaultIfEmpty(defaultValue)(this);\n}\nexports.defaultIfEmpty = defaultIfEmpty;\n//# sourceMappingURL=defaultIfEmpty.js.map","import { Subject } from '../Subject';\nimport { SimpleOuterSubscriber, innerSubscribe, SimpleInnerSubscriber } from '../innerSubscribe';\nexport function window(windowBoundaries) {\n    return function windowOperatorFunction(source) {\n        return source.lift(new WindowOperator(windowBoundaries));\n    };\n}\nclass WindowOperator {\n    constructor(windowBoundaries) {\n        this.windowBoundaries = windowBoundaries;\n    }\n    call(subscriber, source) {\n        const windowSubscriber = new WindowSubscriber(subscriber);\n        const sourceSubscription = source.subscribe(windowSubscriber);\n        if (!sourceSubscription.closed) {\n            windowSubscriber.add(innerSubscribe(this.windowBoundaries, new SimpleInnerSubscriber(windowSubscriber)));\n        }\n        return sourceSubscription;\n    }\n}\nclass WindowSubscriber extends SimpleOuterSubscriber {\n    constructor(destination) {\n        super(destination);\n        this.window = new Subject();\n        destination.next(this.window);\n    }\n    notifyNext() {\n        this.openWindow();\n    }\n    notifyError(error) {\n        this._error(error);\n    }\n    notifyComplete() {\n        this._complete();\n    }\n    _next(value) {\n        this.window.next(value);\n    }\n    _error(err) {\n        this.window.error(err);\n        this.destination.error(err);\n    }\n    _complete() {\n        this.window.complete();\n        this.destination.complete();\n    }\n    _unsubscribe() {\n        this.window = null;\n    }\n    openWindow() {\n        const prevWindow = this.window;\n        if (prevWindow) {\n            prevWindow.complete();\n        }\n        const destination = this.destination;\n        const newWindow = this.window = new Subject();\n        destination.next(newWindow);\n    }\n}\n//# sourceMappingURL=window.js.map","export function isDate(value) {\n    return value instanceof Date && !isNaN(+value);\n}\n//# sourceMappingURL=isDate.js.map","import { errorObject } from './errorObject';\nlet tryCatchTarget;\nfunction tryCatcher() {\n    errorObject.e = undefined;\n    try {\n        return tryCatchTarget.apply(this, arguments);\n    }\n    catch (e) {\n        errorObject.e = e;\n        return errorObject;\n    }\n    finally {\n        tryCatchTarget = undefined;\n    }\n}\nexport function tryCatch(fn) {\n    tryCatchTarget = fn;\n    return tryCatcher;\n}\n//# sourceMappingURL=tryCatch.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.merge = rxjs_1.merge;\n//# sourceMappingURL=merge.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar delay_1 = require(\"../../operator/delay\");\nrxjs_1.Observable.prototype.delay = delay_1.delay;\n//# sourceMappingURL=delay.js.map","var getPrototypeOf = require(\"./getPrototypeOf\");\n\nfunction _superPropBase(object, property) {\n  while (!Object.prototype.hasOwnProperty.call(object, property)) {\n    object = getPrototypeOf(object);\n    if (object === null) break;\n  }\n\n  return object;\n}\n\nmodule.exports = _superPropBase;","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Branch out the source Observable values as a nested Observable starting from\n * an emission from `openings` and ending when the output of `closingSelector`\n * emits.\n *\n * <span class=\"informal\">It's like {@link bufferToggle}, but emits a nested\n * Observable instead of an array.</span>\n *\n * <img src=\"./img/windowToggle.png\" width=\"100%\">\n *\n * Returns an Observable that emits windows of items it collects from the source\n * Observable. The output Observable emits windows that contain those items\n * emitted by the source Observable between the time when the `openings`\n * Observable emits an item and when the Observable returned by\n * `closingSelector` emits an item.\n *\n * @example <caption>Every other second, emit the click events from the next 500ms</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var openings = Rx.Observable.interval(1000);\n * var result = clicks.windowToggle(openings, i =>\n *   i % 2 ? Rx.Observable.interval(500) : Rx.Observable.empty()\n * ).mergeAll();\n * result.subscribe(x => console.log(x));\n *\n * @see {@link window}\n * @see {@link windowCount}\n * @see {@link windowTime}\n * @see {@link windowWhen}\n * @see {@link bufferToggle}\n *\n * @param {Observable<O>} openings An observable of notifications to start new\n * windows.\n * @param {function(value: O): Observable} closingSelector A function that takes\n * the value emitted by the `openings` observable and returns an Observable,\n * which, when it emits (either `next` or `complete`), signals that the\n * associated window should complete.\n * @return {Observable<Observable<T>>} An observable of windows, which in turn\n * are Observables.\n * @method windowToggle\n * @owner Observable\n */\nfunction windowToggle(openings, closingSelector) {\n    return operators_1.windowToggle(openings, closingSelector)(this);\n}\nexports.windowToggle = windowToggle;\n//# sourceMappingURL=windowToggle.js.map","export function isFunction(x) {\n    return typeof x === 'function';\n}\n//# sourceMappingURL=isFunction.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Inject, Injectable, PLATFORM_ID} from '@angular/core';\nimport {isPlatformBrowser} from '@angular/common';\n\n// Whether the current platform supports the V8 Break Iterator. The V8 check\n// is necessary to detect all Blink based browsers.\nlet hasV8BreakIterator: boolean;\n\n// We need a try/catch around the reference to `Intl`, because accessing it in some cases can\n// cause IE to throw. These cases are tied to particular versions of Windows and can happen if\n// the consumer is providing a polyfilled `Map`. See:\n// https://github.com/Microsoft/ChakraCore/issues/3189\n// https://github.com/angular/components/issues/15687\ntry {\n  hasV8BreakIterator = (typeof Intl !== 'undefined' && (Intl as any).v8BreakIterator);\n} catch {\n  hasV8BreakIterator = false;\n}\n\n/**\n * Service to detect the current platform by comparing the userAgent strings and\n * checking browser-specific global properties.\n */\n@Injectable({providedIn: 'root'})\nexport class Platform {\n  // We want to use the Angular platform check because if the Document is shimmed\n  // without the navigator, the following checks will fail. This is preferred because\n  // sometimes the Document may be shimmed without the user's knowledge or intention\n  /** Whether the Angular application is being rendered in the browser. */\n  isBrowser: boolean = this._platformId ?\n      isPlatformBrowser(this._platformId) : typeof document === 'object' && !!document;\n\n  /** Whether the current browser is Microsoft Edge. */\n  EDGE: boolean = this.isBrowser && /(edge)/i.test(navigator.userAgent);\n\n  /** Whether the current rendering engine is Microsoft Trident. */\n  TRIDENT: boolean = this.isBrowser && /(msie|trident)/i.test(navigator.userAgent);\n\n  // EdgeHTML and Trident mock Blink specific things and need to be excluded from this check.\n  /** Whether the current rendering engine is Blink. */\n  BLINK: boolean = this.isBrowser && (!!((window as any).chrome || hasV8BreakIterator) &&\n      typeof CSS !== 'undefined' && !this.EDGE && !this.TRIDENT);\n\n  // Webkit is part of the userAgent in EdgeHTML, Blink and Trident. Therefore we need to\n  // ensure that Webkit runs standalone and is not used as another engine's base.\n  /** Whether the current rendering engine is WebKit. */\n  WEBKIT: boolean = this.isBrowser &&\n      /AppleWebKit/i.test(navigator.userAgent) && !this.BLINK && !this.EDGE && !this.TRIDENT;\n\n  /** Whether the current platform is Apple iOS. */\n  IOS: boolean = this.isBrowser && /iPad|iPhone|iPod/.test(navigator.userAgent) &&\n      !('MSStream' in window);\n\n  // It's difficult to detect the plain Gecko engine, because most of the browsers identify\n  // them self as Gecko-like browsers and modify the userAgent's according to that.\n  // Since we only cover one explicit Firefox case, we can simply check for Firefox\n  // instead of having an unstable check for Gecko.\n  /** Whether the current browser is Firefox. */\n  FIREFOX: boolean = this.isBrowser && /(firefox|minefield)/i.test(navigator.userAgent);\n\n  /** Whether the current platform is Android. */\n  // Trident on mobile adds the android platform to the userAgent to trick detections.\n  ANDROID: boolean = this.isBrowser && /android/i.test(navigator.userAgent) && !this.TRIDENT;\n\n  // Safari browsers will include the Safari keyword in their userAgent. Some browsers may fake\n  // this and just place the Safari keyword in the userAgent. To be more safe about Safari every\n  // Safari browser should also use Webkit as its layout engine.\n  /** Whether the current browser is Safari. */\n  SAFARI: boolean = this.isBrowser && /safari/i.test(navigator.userAgent) && this.WEBKIT;\n\n  constructor(@Inject(PLATFORM_ID) private _platformId: Object) {}\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgModule} from '@angular/core';\n\n\n@NgModule({})\nexport class PlatformModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/** Cached result Set of input types support by the current browser. */\nlet supportedInputTypes: Set<string>;\n\n/** Types of `<input>` that *might* be supported. */\nconst candidateInputTypes = [\n  // `color` must come first. Chrome 56 shows a warning if we change the type to `color` after\n  // first changing it to something else:\n  // The specified value \"\" does not conform to the required format.\n  // The format is \"#rrggbb\" where rr, gg, bb are two-digit hexadecimal numbers.\n  'color',\n  'button',\n  'checkbox',\n  'date',\n  'datetime-local',\n  'email',\n  'file',\n  'hidden',\n  'image',\n  'month',\n  'number',\n  'password',\n  'radio',\n  'range',\n  'reset',\n  'search',\n  'submit',\n  'tel',\n  'text',\n  'time',\n  'url',\n  'week',\n];\n\n/** @returns The input types supported by this browser. */\nexport function getSupportedInputTypes(): Set<string> {\n  // Result is cached.\n  if (supportedInputTypes) {\n    return supportedInputTypes;\n  }\n\n  // We can't check if an input type is not supported until we're on the browser, so say that\n  // everything is supported when not on the browser. We don't use `Platform` here since it's\n  // just a helper function and can't inject it.\n  if (typeof document !== 'object' || !document) {\n    supportedInputTypes = new Set(candidateInputTypes);\n    return supportedInputTypes;\n  }\n\n  let featureTestInput = document.createElement('input');\n  supportedInputTypes = new Set(candidateInputTypes.filter(value => {\n    featureTestInput.setAttribute('type', value);\n    return featureTestInput.type === value;\n  }));\n\n  return supportedInputTypes;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/** Cached result of whether the user's browser supports passive event listeners. */\nlet supportsPassiveEvents: boolean;\n\n/**\n * Checks whether the user's browser supports passive event listeners.\n * See: https://github.com/WICG/EventListenerOptions/blob/gh-pages/explainer.md\n */\nexport function supportsPassiveEventListeners(): boolean {\n  if (supportsPassiveEvents == null && typeof window !== 'undefined') {\n    try {\n      window.addEventListener('test', null!, Object.defineProperty({}, 'passive', {\n        get: () => supportsPassiveEvents = true\n      }));\n    } finally {\n      supportsPassiveEvents = supportsPassiveEvents || false;\n    }\n  }\n\n  return supportsPassiveEvents;\n}\n\n/**\n * Normalizes an `AddEventListener` object to something that can be passed\n * to `addEventListener` on any browser, no matter whether it supports the\n * `options` parameter.\n * @param options Object to be normalized.\n */\nexport function normalizePassiveListenerOptions(options: AddEventListenerOptions):\n  AddEventListenerOptions | boolean {\n  return supportsPassiveEventListeners() ? options : !!options.capture;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/** The possible ways the browser may handle the horizontal scroll axis in RTL languages. */\nexport const enum RtlScrollAxisType {\n  /**\n   * scrollLeft is 0 when scrolled all the way left and (scrollWidth - clientWidth) when scrolled\n   * all the way right.\n   */\n  NORMAL,\n  /**\n   * scrollLeft is -(scrollWidth - clientWidth) when scrolled all the way left and 0 when scrolled\n   * all the way right.\n   */\n  NEGATED,\n  /**\n   * scrollLeft is (scrollWidth - clientWidth) when scrolled all the way left and 0 when scrolled\n   * all the way right.\n   */\n  INVERTED\n}\n\n/** Cached result of the way the browser handles the horizontal scroll axis in RTL mode. */\nlet rtlScrollAxisType: RtlScrollAxisType|undefined;\n\n/** Cached result of the check that indicates whether the browser supports scroll behaviors. */\nlet scrollBehaviorSupported: boolean|undefined;\n\n/** Check whether the browser supports scroll behaviors. */\nexport function supportsScrollBehavior(): boolean {\n  if (scrollBehaviorSupported == null) {\n    // If we're not in the browser, it can't be supported.\n    if (typeof document !== 'object' || !document) {\n      scrollBehaviorSupported = false;\n    }\n\n    // If the element can have a `scrollBehavior` style, we can be sure that it's supported.\n    if ('scrollBehavior' in document.documentElement!.style) {\n      scrollBehaviorSupported = true;\n    } else {\n      // At this point we have 3 possibilities: `scrollTo` isn't supported at all, it's\n      // supported but it doesn't handle scroll behavior, or it has been polyfilled.\n      const scrollToFunction: Function|undefined = Element.prototype.scrollTo;\n\n      if (scrollToFunction) {\n        // We can detect if the function has been polyfilled by calling `toString` on it. Native\n        // functions are obfuscated using `[native code]`, whereas if it was overwritten we'd get\n        // the actual function source. Via https://davidwalsh.name/detect-native-function. Consider\n        // polyfilled functions as supporting scroll behavior.\n        scrollBehaviorSupported = !/\\{\\s*\\[native code\\]\\s*\\}/.test(scrollToFunction.toString());\n      } else {\n        scrollBehaviorSupported = false;\n      }\n    }\n  }\n\n  return scrollBehaviorSupported;\n}\n\n/**\n * Checks the type of RTL scroll axis used by this browser. As of time of writing, Chrome is NORMAL,\n * Firefox & Safari are NEGATED, and IE & Edge are INVERTED.\n */\nexport function getRtlScrollAxisType(): RtlScrollAxisType {\n  // We can't check unless we're on the browser. Just assume 'normal' if we're not.\n  if (typeof document !== 'object' || !document) {\n    return RtlScrollAxisType.NORMAL;\n  }\n\n  if (rtlScrollAxisType == null) {\n    // Create a 1px wide scrolling container and a 2px wide content element.\n    const scrollContainer = document.createElement('div');\n    const containerStyle = scrollContainer.style;\n    scrollContainer.dir = 'rtl';\n    containerStyle.width = '1px';\n    containerStyle.overflow = 'auto';\n    containerStyle.visibility = 'hidden';\n    containerStyle.pointerEvents = 'none';\n    containerStyle.position = 'absolute';\n\n    const content = document.createElement('div');\n    const contentStyle = content.style;\n    contentStyle.width = '2px';\n    contentStyle.height = '1px';\n\n    scrollContainer.appendChild(content);\n    document.body.appendChild(scrollContainer);\n\n    rtlScrollAxisType = RtlScrollAxisType.NORMAL;\n\n    // The viewport starts scrolled all the way to the right in RTL mode. If we are in a NORMAL\n    // browser this would mean that the scrollLeft should be 1. If it's zero instead we know we're\n    // dealing with one of the other two types of browsers.\n    if (scrollContainer.scrollLeft === 0) {\n      // In a NEGATED browser the scrollLeft is always somewhere in [-maxScrollAmount, 0]. For an\n      // INVERTED browser it is always somewhere in [0, maxScrollAmount]. We can determine which by\n      // setting to the scrollLeft to 1. This is past the max for a NEGATED browser, so it will\n      // return 0 when we read it again.\n      scrollContainer.scrollLeft = 1;\n      rtlScrollAxisType =\n          scrollContainer.scrollLeft === 0 ? RtlScrollAxisType.NEGATED : RtlScrollAxisType.INVERTED;\n    }\n\n    scrollContainer.parentNode!.removeChild(scrollContainer);\n  }\n  return rtlScrollAxisType;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nlet shadowDomIsSupported: boolean;\n\n/** Checks whether the user's browser support Shadow DOM. */\nexport function _supportsShadowDom(): boolean {\n  if (shadowDomIsSupported == null) {\n    const head = typeof document !== 'undefined' ? document.head : null;\n    shadowDomIsSupported = !!(head && ((head as any).createShadowRoot || head.attachShadow));\n  }\n\n  return shadowDomIsSupported;\n}\n\n/** Gets the shadow root of an element, if supported and the element is inside the Shadow DOM. */\nexport function _getShadowRoot(element: HTMLElement): Node | null {\n  if (_supportsShadowDom()) {\n    const rootNode = element.getRootNode ? element.getRootNode() : null;\n\n    // Note that this should be caught by `_supportsShadowDom`, but some\n    // teams have been able to hit this code path on unsupported browsers.\n    if (typeof ShadowRoot !== 'undefined' && ShadowRoot && rootNode instanceof ShadowRoot) {\n      return rootNode;\n    }\n  }\n\n  return null;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './platform';\nexport * from './platform-module';\nexport * from './features/input-types';\nexport * from './features/passive-listeners';\nexport * from './features/scrolling';\nexport * from './features/shadow-dom';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","import { Subscriber } from '../Subscriber';\nimport { Subscription } from '../Subscription';\nexport function finalize(callback) {\n    return (source) => source.lift(new FinallyOperator(callback));\n}\nclass FinallyOperator {\n    constructor(callback) {\n        this.callback = callback;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new FinallySubscriber(subscriber, this.callback));\n    }\n}\nclass FinallySubscriber extends Subscriber {\n    constructor(destination, callback) {\n        super(destination);\n        this.add(new Subscription(callback));\n    }\n}\n//# sourceMappingURL=finalize.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Projects each source value to an Observable which is merged in the output\n * Observable, emitting values only from the most recently projected Observable.\n *\n * <span class=\"informal\">Maps each value to an Observable, then flattens all of\n * these inner Observables using {@link switch}.</span>\n *\n * <img src=\"./img/switchMap.png\" width=\"100%\">\n *\n * Returns an Observable that emits items based on applying a function that you\n * supply to each item emitted by the source Observable, where that function\n * returns an (so-called \"inner\") Observable. Each time it observes one of these\n * inner Observables, the output Observable begins emitting the items emitted by\n * that inner Observable. When a new inner Observable is emitted, `switchMap`\n * stops emitting items from the earlier-emitted inner Observable and begins\n * emitting items from the new one. It continues to behave like this for\n * subsequent inner Observables.\n *\n * @example <caption>Rerun an interval Observable on every click event</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.switchMap((ev) => Rx.Observable.interval(1000));\n * result.subscribe(x => console.log(x));\n *\n * @see {@link concatMap}\n * @see {@link exhaustMap}\n * @see {@link mergeMap}\n * @see {@link switch}\n * @see {@link switchMapTo}\n *\n * @param {function(value: T, ?index: number): ObservableInput} project A function\n * that, when applied to an item emitted by the source Observable, returns an\n * Observable.\n * @return {Observable} An Observable that emits the result of applying the\n * projection function (and the optional `resultSelector`) to each item emitted\n * by the source Observable and taking only the values from the most recently\n * projected inner Observable.\n * @method switchMap\n * @owner Observable\n */\nfunction switchMap(project) {\n    return operators_1.switchMap(project)(this);\n}\nexports.switchMap = switchMap;\n//# sourceMappingURL=switchMap.js.map","export const subscribeToArray = (array) => (subscriber) => {\n    for (let i = 0, len = array.length; i < len && !subscriber.closed; i++) {\n        subscriber.next(array[i]);\n    }\n    subscriber.complete();\n};\n//# sourceMappingURL=subscribeToArray.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * If the source Observable is empty it returns an Observable that emits true, otherwise it emits false.\n *\n * <img src=\"./img/isEmpty.png\" width=\"100%\">\n *\n * @return {Observable} An Observable that emits a Boolean.\n * @method isEmpty\n * @owner Observable\n */\nfunction isEmpty() {\n    return operators_1.isEmpty()(this);\n}\nexports.isEmpty = isEmpty;\n//# sourceMappingURL=isEmpty.js.map","module.exports = require(\"regenerator-runtime\");\n","import { connectableObservableDescriptor } from '../observable/ConnectableObservable';\nexport function multicast(subjectOrSubjectFactory, selector) {\n    return function multicastOperatorFunction(source) {\n        let subjectFactory;\n        if (typeof subjectOrSubjectFactory === 'function') {\n            subjectFactory = subjectOrSubjectFactory;\n        }\n        else {\n            subjectFactory = function subjectFactory() {\n                return subjectOrSubjectFactory;\n            };\n        }\n        if (typeof selector === 'function') {\n            return source.lift(new MulticastOperator(subjectFactory, selector));\n        }\n        const connectable = Object.create(source, connectableObservableDescriptor);\n        connectable.source = source;\n        connectable.subjectFactory = subjectFactory;\n        return connectable;\n    };\n}\nexport class MulticastOperator {\n    constructor(subjectFactory, selector) {\n        this.subjectFactory = subjectFactory;\n        this.selector = selector;\n    }\n    call(subscriber, source) {\n        const { selector } = this;\n        const subject = this.subjectFactory();\n        const subscription = selector(subject).subscribe(subscriber);\n        subscription.add(source.subscribe(subject));\n        return subscription;\n    }\n}\n//# sourceMappingURL=multicast.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar take_1 = require(\"../../operator/take\");\nrxjs_1.Observable.prototype.take = take_1.take;\n//# sourceMappingURL=take.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/* tslint:enable:max-line-length */\n/**\n * Projects each source value to the same Observable which is flattened multiple\n * times with {@link switch} in the output Observable.\n *\n * <span class=\"informal\">It's like {@link switchMap}, but maps each value\n * always to the same inner Observable.</span>\n *\n * <img src=\"./img/switchMapTo.png\" width=\"100%\">\n *\n * Maps each source value to the given Observable `innerObservable` regardless\n * of the source value, and then flattens those resulting Observables into one\n * single Observable, which is the output Observable. The output Observables\n * emits values only from the most recently emitted instance of\n * `innerObservable`.\n *\n * @example <caption>Rerun an interval Observable on every click event</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.switchMapTo(Rx.Observable.interval(1000));\n * result.subscribe(x => console.log(x));\n *\n * @see {@link concatMapTo}\n * @see {@link switch}\n * @see {@link switchMap}\n * @see {@link mergeMapTo}\n *\n * @param {ObservableInput} innerObservable An Observable to replace each value from\n * the source Observable.\n * @return {Observable} An Observable that emits items from the given\n * `innerObservable` (and optionally transformed through `resultSelector`) every\n * time a value is emitted on the source Observable, and taking only the values\n * from the most recently projected inner Observable.\n * @method switchMapTo\n * @owner Observable\n */\nfunction switchMapTo(innerObservable) {\n    return operators_1.switchMapTo(innerObservable)(this);\n}\nexports.switchMapTo = switchMapTo;\n//# sourceMappingURL=switchMapTo.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar reduce_1 = require(\"../../operator/reduce\");\nrxjs_1.Observable.prototype.reduce = reduce_1.reduce;\n//# sourceMappingURL=reduce.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\n/**\n * @param func\n * @return {Observable<R>}\n * @method let\n * @owner Observable\n */\nfunction letProto(func) {\n    return func(this);\n}\nexports.letProto = letProto;\n//# sourceMappingURL=let.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nlet _DOM: DomAdapter = null!;\n\nexport function getDOM(): DomAdapter {\n  return _DOM;\n}\n\nexport function setDOM(adapter: DomAdapter) {\n  _DOM = adapter;\n}\n\nexport function setRootDomAdapter(adapter: DomAdapter) {\n  if (!_DOM) {\n    _DOM = adapter;\n  }\n}\n\n/* tslint:disable:requireParameterType */\n/**\n * Provides DOM operations in an environment-agnostic way.\n *\n * @security Tread carefully! Interacting with the DOM directly is dangerous and\n * can introduce XSS risks.\n */\nexport abstract class DomAdapter {\n  // Needs Domino-friendly test utility\n  abstract getProperty(el: Element, name: string): any;\n  abstract dispatchEvent(el: any, evt: any): any;\n\n  // Used by router\n  abstract log(error: any): any;\n  abstract logGroup(error: any): any;\n  abstract logGroupEnd(): any;\n\n  // Used by Meta\n  abstract remove(el: any): Node;\n  abstract createElement(tagName: any, doc?: any): HTMLElement;\n  abstract createHtmlDocument(): HTMLDocument;\n  abstract getDefaultDocument(): Document;\n\n  // Used by By.css\n  abstract isElementNode(node: any): boolean;\n\n  // Used by Testability\n  abstract isShadowRoot(node: any): boolean;\n\n  // Used by KeyEventsPlugin\n  abstract onAndCancel(el: any, evt: any, listener: any): Function;\n  abstract supportsDOMEvents(): boolean;\n\n  // Used by PlatformLocation and ServerEventManagerPlugin\n  abstract getGlobalEventTarget(doc: Document, target: string): any;\n\n  // Used by PlatformLocation\n  abstract getHistory(): History;\n  abstract getLocation():\n      any; /** This is the ambient Location definition, NOT Location from @angular/common.  */\n  abstract getBaseHref(doc: Document): string|null;\n  abstract resetBaseElement(): void;\n\n  // TODO: remove dependency in DefaultValueAccessor\n  abstract getUserAgent(): string;\n\n  // Used by AngularProfiler\n  abstract performanceNow(): number;\n\n  // Used by CookieXSRFStrategy\n  abstract supportsCookies(): boolean;\n  abstract getCookie(name: string): string|null;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {InjectionToken} from '@angular/core';\n\n/**\n * A DI Token representing the main rendering context. In a browser this is the DOM Document.\n *\n * Note: Document might not be available in the Application Context when Application and Rendering\n * Contexts are not the same (e.g. when running the application in a Web Worker).\n *\n * @publicApi\n */\nexport const DOCUMENT = new InjectionToken<Document>('DocumentToken');\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Inject, Injectable, InjectionToken, ɵɵinject} from '@angular/core';\nimport {getDOM} from '../dom_adapter';\nimport {DOCUMENT} from '../dom_tokens';\n\n/**\n * This class should not be used directly by an application developer. Instead, use\n * {@link Location}.\n *\n * `PlatformLocation` encapsulates all calls to DOM APIs, which allows the Router to be\n * platform-agnostic.\n * This means that we can have different implementation of `PlatformLocation` for the different\n * platforms that Angular supports. For example, `@angular/platform-browser` provides an\n * implementation specific to the browser environment, while `@angular/platform-server` provides\n * one suitable for use with server-side rendering.\n *\n * The `PlatformLocation` class is used directly by all implementations of {@link LocationStrategy}\n * when they need to interact with the DOM APIs like pushState, popState, etc.\n *\n * {@link LocationStrategy} in turn is used by the {@link Location} service which is used directly\n * by the {@link Router} in order to navigate between routes. Since all interactions between {@link\n * Router} /\n * {@link Location} / {@link LocationStrategy} and DOM APIs flow through the `PlatformLocation`\n * class, they are all platform-agnostic.\n *\n * @publicApi\n */\n@Injectable({\n  providedIn: 'platform',\n  // See #23917\n  useFactory: useBrowserPlatformLocation\n})\nexport abstract class PlatformLocation {\n  abstract getBaseHrefFromDOM(): string;\n  abstract getState(): unknown;\n  abstract onPopState(fn: LocationChangeListener): void;\n  abstract onHashChange(fn: LocationChangeListener): void;\n\n  abstract get href(): string;\n  abstract get protocol(): string;\n  abstract get hostname(): string;\n  abstract get port(): string;\n  abstract get pathname(): string;\n  abstract get search(): string;\n  abstract get hash(): string;\n\n  abstract replaceState(state: any, title: string, url: string): void;\n\n  abstract pushState(state: any, title: string, url: string): void;\n\n  abstract forward(): void;\n\n  abstract back(): void;\n}\n\nexport function useBrowserPlatformLocation() {\n  return ɵɵinject(BrowserPlatformLocation);\n}\n\n/**\n * @description\n * Indicates when a location is initialized.\n *\n * @publicApi\n */\nexport const LOCATION_INITIALIZED = new InjectionToken<Promise<any>>('Location Initialized');\n\n/**\n * @description\n * A serializable version of the event from `onPopState` or `onHashChange`\n *\n * @publicApi\n */\nexport interface LocationChangeEvent {\n  type: string;\n  state: any;\n}\n\n/**\n * @publicApi\n */\nexport interface LocationChangeListener {\n  (event: LocationChangeEvent): any;\n}\n\n\n\n/**\n * `PlatformLocation` encapsulates all of the direct calls to platform APIs.\n * This class should not be used directly by an application developer. Instead, use\n * {@link Location}.\n */\n@Injectable({\n  providedIn: 'platform',\n  // See #23917\n  useFactory: createBrowserPlatformLocation,\n})\nexport class BrowserPlatformLocation extends PlatformLocation {\n  public readonly location!: Location;\n  private _history!: History;\n\n  constructor(@Inject(DOCUMENT) private _doc: any) {\n    super();\n    this._init();\n  }\n\n  // This is moved to its own method so that `MockPlatformLocationStrategy` can overwrite it\n  /** @internal */\n  _init() {\n    (this as {location: Location}).location = getDOM().getLocation();\n    this._history = getDOM().getHistory();\n  }\n\n  getBaseHrefFromDOM(): string {\n    return getDOM().getBaseHref(this._doc)!;\n  }\n\n  onPopState(fn: LocationChangeListener): void {\n    getDOM().getGlobalEventTarget(this._doc, 'window').addEventListener('popstate', fn, false);\n  }\n\n  onHashChange(fn: LocationChangeListener): void {\n    getDOM().getGlobalEventTarget(this._doc, 'window').addEventListener('hashchange', fn, false);\n  }\n\n  get href(): string {\n    return this.location.href;\n  }\n  get protocol(): string {\n    return this.location.protocol;\n  }\n  get hostname(): string {\n    return this.location.hostname;\n  }\n  get port(): string {\n    return this.location.port;\n  }\n  get pathname(): string {\n    return this.location.pathname;\n  }\n  get search(): string {\n    return this.location.search;\n  }\n  get hash(): string {\n    return this.location.hash;\n  }\n  set pathname(newPath: string) {\n    this.location.pathname = newPath;\n  }\n\n  pushState(state: any, title: string, url: string): void {\n    if (supportsState()) {\n      this._history.pushState(state, title, url);\n    } else {\n      this.location.hash = url;\n    }\n  }\n\n  replaceState(state: any, title: string, url: string): void {\n    if (supportsState()) {\n      this._history.replaceState(state, title, url);\n    } else {\n      this.location.hash = url;\n    }\n  }\n\n  forward(): void {\n    this._history.forward();\n  }\n\n  back(): void {\n    this._history.back();\n  }\n\n  getState(): unknown {\n    return this._history.state;\n  }\n}\n\nexport function supportsState(): boolean {\n  return !!window.history.pushState;\n}\nexport function createBrowserPlatformLocation() {\n  return new BrowserPlatformLocation(ɵɵinject(DOCUMENT));\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport {DomAdapter as ɵDomAdapter, getDOM as ɵgetDOM, setRootDomAdapter as ɵsetRootDomAdapter} from './dom_adapter';\nexport {BrowserPlatformLocation as ɵBrowserPlatformLocation} from './location/platform_location';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n\n/**\n * Joins two parts of a URL with a slash if needed.\n *\n * @param start  URL string\n * @param end    URL string\n *\n *\n * @returns The joined URL string.\n */\nexport function joinWithSlash(start: string, end: string): string {\n  if (start.length == 0) {\n    return end;\n  }\n  if (end.length == 0) {\n    return start;\n  }\n  let slashes = 0;\n  if (start.endsWith('/')) {\n    slashes++;\n  }\n  if (end.startsWith('/')) {\n    slashes++;\n  }\n  if (slashes == 2) {\n    return start + end.substring(1);\n  }\n  if (slashes == 1) {\n    return start + end;\n  }\n  return start + '/' + end;\n}\n\n/**\n * Removes a trailing slash from a URL string if needed.\n * Looks for the first occurrence of either `#`, `?`, or the end of the\n * line as `/` characters and removes the trailing slash if one exists.\n *\n * @param url URL string.\n *\n * @returns The URL string, modified if needed.\n */\nexport function stripTrailingSlash(url: string): string {\n  const match = url.match(/#|\\?|$/);\n  const pathEndIdx = match && match.index || url.length;\n  const droppedSlashIdx = pathEndIdx - (url[pathEndIdx - 1] === '/' ? 1 : 0);\n  return url.slice(0, droppedSlashIdx) + url.slice(pathEndIdx);\n}\n\n/**\n * Normalizes URL parameters by prepending with `?` if needed.\n *\n * @param  params String of URL parameters.\n *\n * @returns The normalized URL parameters string.\n */\nexport function normalizeQueryParams(params: string): string {\n  return params && params[0] !== '?' ? '?' + params : params;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Inject, Injectable, InjectionToken, Optional, ɵɵinject} from '@angular/core';\nimport {DOCUMENT} from '../dom_tokens';\nimport {LocationChangeListener, PlatformLocation} from './platform_location';\nimport {joinWithSlash, normalizeQueryParams} from './util';\n\n/**\n * Enables the `Location` service to read route state from the browser's URL.\n * Angular provides two strategies:\n * `HashLocationStrategy` and `PathLocationStrategy`.\n *\n * Applications should use the `Router` or `Location` services to\n * interact with application route state.\n *\n * For instance, `HashLocationStrategy` produces URLs like\n * <code class=\"no-auto-link\">http://example.com#/foo</code>,\n * and `PathLocationStrategy` produces\n * <code class=\"no-auto-link\">http://example.com/foo</code> as an equivalent URL.\n *\n * See these two classes for more.\n *\n * @publicApi\n */\n@Injectable({providedIn: 'root', useFactory: provideLocationStrategy})\nexport abstract class LocationStrategy {\n  abstract path(includeHash?: boolean): string;\n  abstract prepareExternalUrl(internal: string): string;\n  abstract pushState(state: any, title: string, url: string, queryParams: string): void;\n  abstract replaceState(state: any, title: string, url: string, queryParams: string): void;\n  abstract forward(): void;\n  abstract back(): void;\n  abstract onPopState(fn: LocationChangeListener): void;\n  abstract getBaseHref(): string;\n}\n\nexport function provideLocationStrategy(platformLocation: PlatformLocation) {\n  // See #23917\n  const location = ɵɵinject(DOCUMENT).location;\n  return new PathLocationStrategy(\n      ɵɵinject(PlatformLocation as any), location && location.origin || '');\n}\n\n\n/**\n * A predefined [DI token](guide/glossary#di-token) for the base href\n * to be used with the `PathLocationStrategy`.\n * The base href is the URL prefix that should be preserved when generating\n * and recognizing URLs.\n *\n * @usageNotes\n *\n * The following example shows how to use this token to configure the root app injector\n * with a base href value, so that the DI framework can supply the dependency anywhere in the app.\n *\n * ```typescript\n * import {Component, NgModule} from '@angular/core';\n * import {APP_BASE_HREF} from '@angular/common';\n *\n * @NgModule({\n *   providers: [{provide: APP_BASE_HREF, useValue: '/my/app'}]\n * })\n * class AppModule {}\n * ```\n *\n * @publicApi\n */\nexport const APP_BASE_HREF = new InjectionToken<string>('appBaseHref');\n\n/**\n * @description\n * A {@link LocationStrategy} used to configure the {@link Location} service to\n * represent its state in the\n * [path](https://en.wikipedia.org/wiki/Uniform_Resource_Locator#Syntax) of the\n * browser's URL.\n *\n * If you're using `PathLocationStrategy`, you must provide a {@link APP_BASE_HREF}\n * or add a `<base href>` element to the document.\n *\n * For instance, if you provide an `APP_BASE_HREF` of `'/my/app/'` and call\n * `location.go('/foo')`, the browser's URL will become\n * `example.com/my/app/foo`. To ensure all relative URIs resolve correctly,\n * the `<base href>` and/or `APP_BASE_HREF` should end with a `/`.\n *\n * Similarly, if you add `<base href='/my/app/'/>` to the document and call\n * `location.go('/foo')`, the browser's URL will become\n * `example.com/my/app/foo`.\n *\n * Note that when using `PathLocationStrategy`, neither the query nor\n * the fragment in the `<base href>` will be preserved, as outlined\n * by the [RFC](https://tools.ietf.org/html/rfc3986#section-5.2.2).\n *\n * @usageNotes\n *\n * ### Example\n *\n * {@example common/location/ts/path_location_component.ts region='LocationComponent'}\n *\n * @publicApi\n */\n@Injectable()\nexport class PathLocationStrategy extends LocationStrategy {\n  private _baseHref: string;\n\n  constructor(\n      private _platformLocation: PlatformLocation,\n      @Optional() @Inject(APP_BASE_HREF) href?: string) {\n    super();\n\n    if (href == null) {\n      href = this._platformLocation.getBaseHrefFromDOM();\n    }\n\n    if (href == null) {\n      throw new Error(\n          `No base href set. Please provide a value for the APP_BASE_HREF token or add a base element to the document.`);\n    }\n\n    this._baseHref = href;\n  }\n\n  onPopState(fn: LocationChangeListener): void {\n    this._platformLocation.onPopState(fn);\n    this._platformLocation.onHashChange(fn);\n  }\n\n  getBaseHref(): string {\n    return this._baseHref;\n  }\n\n  prepareExternalUrl(internal: string): string {\n    return joinWithSlash(this._baseHref, internal);\n  }\n\n  path(includeHash: boolean = false): string {\n    const pathname =\n        this._platformLocation.pathname + normalizeQueryParams(this._platformLocation.search);\n    const hash = this._platformLocation.hash;\n    return hash && includeHash ? `${pathname}${hash}` : pathname;\n  }\n\n  pushState(state: any, title: string, url: string, queryParams: string) {\n    const externalUrl = this.prepareExternalUrl(url + normalizeQueryParams(queryParams));\n    this._platformLocation.pushState(state, title, externalUrl);\n  }\n\n  replaceState(state: any, title: string, url: string, queryParams: string) {\n    const externalUrl = this.prepareExternalUrl(url + normalizeQueryParams(queryParams));\n    this._platformLocation.replaceState(state, title, externalUrl);\n  }\n\n  forward(): void {\n    this._platformLocation.forward();\n  }\n\n  back(): void {\n    this._platformLocation.back();\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Inject, Injectable, Optional} from '@angular/core';\nimport {APP_BASE_HREF, LocationStrategy} from './location_strategy';\nimport {LocationChangeListener, PlatformLocation} from './platform_location';\nimport {joinWithSlash, normalizeQueryParams} from './util';\n\n\n\n/**\n * @description\n * A {@link LocationStrategy} used to configure the {@link Location} service to\n * represent its state in the\n * [hash fragment](https://en.wikipedia.org/wiki/Uniform_Resource_Locator#Syntax)\n * of the browser's URL.\n *\n * For instance, if you call `location.go('/foo')`, the browser's URL will become\n * `example.com#/foo`.\n *\n * @usageNotes\n *\n * ### Example\n *\n * {@example common/location/ts/hash_location_component.ts region='LocationComponent'}\n *\n * @publicApi\n */\n@Injectable()\nexport class HashLocationStrategy extends LocationStrategy {\n  private _baseHref: string = '';\n  constructor(\n      private _platformLocation: PlatformLocation,\n      @Optional() @Inject(APP_BASE_HREF) _baseHref?: string) {\n    super();\n    if (_baseHref != null) {\n      this._baseHref = _baseHref;\n    }\n  }\n\n  onPopState(fn: LocationChangeListener): void {\n    this._platformLocation.onPopState(fn);\n    this._platformLocation.onHashChange(fn);\n  }\n\n  getBaseHref(): string {\n    return this._baseHref;\n  }\n\n  path(includeHash: boolean = false): string {\n    // the hash value is always prefixed with a `#`\n    // and if it is empty then it will stay empty\n    let path = this._platformLocation.hash;\n    if (path == null) path = '#';\n\n    return path.length > 0 ? path.substring(1) : path;\n  }\n\n  prepareExternalUrl(internal: string): string {\n    const url = joinWithSlash(this._baseHref, internal);\n    return url.length > 0 ? ('#' + url) : url;\n  }\n\n  pushState(state: any, title: string, path: string, queryParams: string) {\n    let url: string|null = this.prepareExternalUrl(path + normalizeQueryParams(queryParams));\n    if (url.length == 0) {\n      url = this._platformLocation.pathname;\n    }\n    this._platformLocation.pushState(state, title, url);\n  }\n\n  replaceState(state: any, title: string, path: string, queryParams: string) {\n    let url = this.prepareExternalUrl(path + normalizeQueryParams(queryParams));\n    if (url.length == 0) {\n      url = this._platformLocation.pathname;\n    }\n    this._platformLocation.replaceState(state, title, url);\n  }\n\n  forward(): void {\n    this._platformLocation.forward();\n  }\n\n  back(): void {\n    this._platformLocation.back();\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {EventEmitter, Injectable, ɵɵinject} from '@angular/core';\nimport {SubscriptionLike} from 'rxjs';\nimport {LocationStrategy} from './location_strategy';\nimport {PlatformLocation} from './platform_location';\nimport {joinWithSlash, normalizeQueryParams, stripTrailingSlash} from './util';\n\n/** @publicApi */\nexport interface PopStateEvent {\n  pop?: boolean;\n  state?: any;\n  type?: string;\n  url?: string;\n}\n\n/**\n * @description\n *\n * A service that applications can use to interact with a browser's URL.\n *\n * Depending on the `LocationStrategy` used, `Location` persists\n * to the URL's path or the URL's hash segment.\n *\n * @usageNotes\n *\n * It's better to use the `Router#navigate` service to trigger route changes. Use\n * `Location` only if you need to interact with or create normalized URLs outside of\n * routing.\n *\n * `Location` is responsible for normalizing the URL against the application's base href.\n * A normalized URL is absolute from the URL host, includes the application's base href, and has no\n * trailing slash:\n * - `/my/app/user/123` is normalized\n * - `my/app/user/123` **is not** normalized\n * - `/my/app/user/123/` **is not** normalized\n *\n * ### Example\n *\n * <code-example path='common/location/ts/path_location_component.ts'\n * region='LocationComponent'></code-example>\n *\n * @publicApi\n */\n@Injectable({\n  providedIn: 'root',\n  // See #23917\n  useFactory: createLocation,\n})\nexport class Location {\n  /** @internal */\n  _subject: EventEmitter<any> = new EventEmitter();\n  /** @internal */\n  _baseHref: string;\n  /** @internal */\n  _platformStrategy: LocationStrategy;\n  /** @internal */\n  _platformLocation: PlatformLocation;\n  /** @internal */\n  _urlChangeListeners: ((url: string, state: unknown) => void)[] = [];\n  /** @internal */\n  _urlChangeSubscription?: SubscriptionLike;\n\n  constructor(platformStrategy: LocationStrategy, platformLocation: PlatformLocation) {\n    this._platformStrategy = platformStrategy;\n    const browserBaseHref = this._platformStrategy.getBaseHref();\n    this._platformLocation = platformLocation;\n    this._baseHref = stripTrailingSlash(_stripIndexHtml(browserBaseHref));\n    this._platformStrategy.onPopState((ev) => {\n      this._subject.emit({\n        'url': this.path(true),\n        'pop': true,\n        'state': ev.state,\n        'type': ev.type,\n      });\n    });\n  }\n\n  /**\n   * Normalizes the URL path for this location.\n   *\n   * @param includeHash True to include an anchor fragment in the path.\n   *\n   * @returns The normalized URL path.\n   */\n  // TODO: vsavkin. Remove the boolean flag and always include hash once the deprecated router is\n  // removed.\n  path(includeHash: boolean = false): string {\n    return this.normalize(this._platformStrategy.path(includeHash));\n  }\n\n  /**\n   * Reports the current state of the location history.\n   * @returns The current value of the `history.state` object.\n   */\n  getState(): unknown {\n    return this._platformLocation.getState();\n  }\n\n  /**\n   * Normalizes the given path and compares to the current normalized path.\n   *\n   * @param path The given URL path.\n   * @param query Query parameters.\n   *\n   * @returns True if the given URL path is equal to the current normalized path, false\n   * otherwise.\n   */\n  isCurrentPathEqualTo(path: string, query: string = ''): boolean {\n    return this.path() == this.normalize(path + normalizeQueryParams(query));\n  }\n\n  /**\n   * Normalizes a URL path by stripping any trailing slashes.\n   *\n   * @param url String representing a URL.\n   *\n   * @returns The normalized URL string.\n   */\n  normalize(url: string): string {\n    return Location.stripTrailingSlash(_stripBaseHref(this._baseHref, _stripIndexHtml(url)));\n  }\n\n  /**\n   * Normalizes an external URL path.\n   * If the given URL doesn't begin with a leading slash (`'/'`), adds one\n   * before normalizing. Adds a hash if `HashLocationStrategy` is\n   * in use, or the `APP_BASE_HREF` if the `PathLocationStrategy` is in use.\n   *\n   * @param url String representing a URL.\n   *\n   * @returns  A normalized platform-specific URL.\n   */\n  prepareExternalUrl(url: string): string {\n    if (url && url[0] !== '/') {\n      url = '/' + url;\n    }\n    return this._platformStrategy.prepareExternalUrl(url);\n  }\n\n  // TODO: rename this method to pushState\n  /**\n   * Changes the browser's URL to a normalized version of a given URL, and pushes a\n   * new item onto the platform's history.\n   *\n   * @param path  URL path to normalize.\n   * @param query Query parameters.\n   * @param state Location history state.\n   *\n   */\n  go(path: string, query: string = '', state: any = null): void {\n    this._platformStrategy.pushState(state, '', path, query);\n    this._notifyUrlChangeListeners(\n        this.prepareExternalUrl(path + normalizeQueryParams(query)), state);\n  }\n\n  /**\n   * Changes the browser's URL to a normalized version of the given URL, and replaces\n   * the top item on the platform's history stack.\n   *\n   * @param path  URL path to normalize.\n   * @param query Query parameters.\n   * @param state Location history state.\n   */\n  replaceState(path: string, query: string = '', state: any = null): void {\n    this._platformStrategy.replaceState(state, '', path, query);\n    this._notifyUrlChangeListeners(\n        this.prepareExternalUrl(path + normalizeQueryParams(query)), state);\n  }\n\n  /**\n   * Navigates forward in the platform's history.\n   */\n  forward(): void {\n    this._platformStrategy.forward();\n  }\n\n  /**\n   * Navigates back in the platform's history.\n   */\n  back(): void {\n    this._platformStrategy.back();\n  }\n\n  /**\n   * Registers a URL change listener. Use to catch updates performed by the Angular\n   * framework that are not detectible through \"popstate\" or \"hashchange\" events.\n   *\n   * @param fn The change handler function, which take a URL and a location history state.\n   */\n  onUrlChange(fn: (url: string, state: unknown) => void) {\n    this._urlChangeListeners.push(fn);\n\n    if (!this._urlChangeSubscription) {\n      this._urlChangeSubscription = this.subscribe(v => {\n        this._notifyUrlChangeListeners(v.url, v.state);\n      });\n    }\n  }\n\n  /** @internal */\n  _notifyUrlChangeListeners(url: string = '', state: unknown) {\n    this._urlChangeListeners.forEach(fn => fn(url, state));\n  }\n\n  /**\n   * Subscribes to the platform's `popState` events.\n   *\n   * @param value Event that is triggered when the state history changes.\n   * @param exception The exception to throw.\n   *\n   * @returns Subscribed events.\n   */\n  subscribe(\n      onNext: (value: PopStateEvent) => void, onThrow?: ((exception: any) => void)|null,\n      onReturn?: (() => void)|null): SubscriptionLike {\n    return this._subject.subscribe({next: onNext, error: onThrow, complete: onReturn});\n  }\n\n  /**\n   * Normalizes URL parameters by prepending with `?` if needed.\n   *\n   * @param  params String of URL parameters.\n   *\n   * @returns The normalized URL parameters string.\n   */\n  public static normalizeQueryParams: (params: string) => string = normalizeQueryParams;\n\n  /**\n   * Joins two parts of a URL with a slash if needed.\n   *\n   * @param start  URL string\n   * @param end    URL string\n   *\n   *\n   * @returns The joined URL string.\n   */\n  public static joinWithSlash: (start: string, end: string) => string = joinWithSlash;\n\n  /**\n   * Removes a trailing slash from a URL string if needed.\n   * Looks for the first occurrence of either `#`, `?`, or the end of the\n   * line as `/` characters and removes the trailing slash if one exists.\n   *\n   * @param url URL string.\n   *\n   * @returns The URL string, modified if needed.\n   */\n  public static stripTrailingSlash: (url: string) => string = stripTrailingSlash;\n}\n\nexport function createLocation() {\n  return new Location(ɵɵinject(LocationStrategy as any), ɵɵinject(PlatformLocation as any));\n}\n\nfunction _stripBaseHref(baseHref: string, url: string): string {\n  return baseHref && url.startsWith(baseHref) ? url.substring(baseHref.length) : url;\n}\n\nfunction _stripIndexHtml(url: string): string {\n  return url.replace(/\\/index.html$/, '');\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport {HashLocationStrategy} from './hash_location_strategy';\nexport {Location, PopStateEvent} from './location';\nexport {APP_BASE_HREF, LocationStrategy, PathLocationStrategy} from './location_strategy';\nexport {LOCATION_INITIALIZED, LocationChangeEvent, LocationChangeListener, PlatformLocation} from './platform_location';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n// THIS CODE IS GENERATED - DO NOT MODIFY\n// See angular/tools/gulp-tasks/cldr/extract.js\n\nexport type CurrenciesSymbols = [string]|[string | undefined, string];\n\n/** @internal */\nexport const CURRENCIES_EN:\n    {[code: string]: CurrenciesSymbols|[string | undefined, string | undefined, number]} = {\n      'ADP': [undefined, undefined, 0],\n      'AFN': [undefined, undefined, 0],\n      'ALL': [undefined, undefined, 0],\n      'AMD': [undefined, undefined, 2],\n      'AOA': [undefined, 'Kz'],\n      'ARS': [undefined, '$'],\n      'AUD': ['A$', '$'],\n      'BAM': [undefined, 'KM'],\n      'BBD': [undefined, '$'],\n      'BDT': [undefined, '৳'],\n      'BHD': [undefined, undefined, 3],\n      'BIF': [undefined, undefined, 0],\n      'BMD': [undefined, '$'],\n      'BND': [undefined, '$'],\n      'BOB': [undefined, 'Bs'],\n      'BRL': ['R$'],\n      'BSD': [undefined, '$'],\n      'BWP': [undefined, 'P'],\n      'BYN': [undefined, 'р.', 2],\n      'BYR': [undefined, undefined, 0],\n      'BZD': [undefined, '$'],\n      'CAD': ['CA$', '$', 2],\n      'CHF': [undefined, undefined, 2],\n      'CLF': [undefined, undefined, 4],\n      'CLP': [undefined, '$', 0],\n      'CNY': ['CN¥', '¥'],\n      'COP': [undefined, '$', 2],\n      'CRC': [undefined, '₡', 2],\n      'CUC': [undefined, '$'],\n      'CUP': [undefined, '$'],\n      'CZK': [undefined, 'Kč', 2],\n      'DJF': [undefined, undefined, 0],\n      'DKK': [undefined, 'kr', 2],\n      'DOP': [undefined, '$'],\n      'EGP': [undefined, 'E£'],\n      'ESP': [undefined, '₧', 0],\n      'EUR': ['€'],\n      'FJD': [undefined, '$'],\n      'FKP': [undefined, '£'],\n      'GBP': ['£'],\n      'GEL': [undefined, '₾'],\n      'GIP': [undefined, '£'],\n      'GNF': [undefined, 'FG', 0],\n      'GTQ': [undefined, 'Q'],\n      'GYD': [undefined, '$', 2],\n      'HKD': ['HK$', '$'],\n      'HNL': [undefined, 'L'],\n      'HRK': [undefined, 'kn'],\n      'HUF': [undefined, 'Ft', 2],\n      'IDR': [undefined, 'Rp', 2],\n      'ILS': ['₪'],\n      'INR': ['₹'],\n      'IQD': [undefined, undefined, 0],\n      'IRR': [undefined, undefined, 0],\n      'ISK': [undefined, 'kr', 0],\n      'ITL': [undefined, undefined, 0],\n      'JMD': [undefined, '$'],\n      'JOD': [undefined, undefined, 3],\n      'JPY': ['¥', undefined, 0],\n      'KHR': [undefined, '៛'],\n      'KMF': [undefined, 'CF', 0],\n      'KPW': [undefined, '₩', 0],\n      'KRW': ['₩', undefined, 0],\n      'KWD': [undefined, undefined, 3],\n      'KYD': [undefined, '$'],\n      'KZT': [undefined, '₸'],\n      'LAK': [undefined, '₭', 0],\n      'LBP': [undefined, 'L£', 0],\n      'LKR': [undefined, 'Rs'],\n      'LRD': [undefined, '$'],\n      'LTL': [undefined, 'Lt'],\n      'LUF': [undefined, undefined, 0],\n      'LVL': [undefined, 'Ls'],\n      'LYD': [undefined, undefined, 3],\n      'MGA': [undefined, 'Ar', 0],\n      'MGF': [undefined, undefined, 0],\n      'MMK': [undefined, 'K', 0],\n      'MNT': [undefined, '₮', 2],\n      'MRO': [undefined, undefined, 0],\n      'MUR': [undefined, 'Rs', 2],\n      'MXN': ['MX$', '$'],\n      'MYR': [undefined, 'RM'],\n      'NAD': [undefined, '$'],\n      'NGN': [undefined, '₦'],\n      'NIO': [undefined, 'C$'],\n      'NOK': [undefined, 'kr', 2],\n      'NPR': [undefined, 'Rs'],\n      'NZD': ['NZ$', '$'],\n      'OMR': [undefined, undefined, 3],\n      'PHP': [undefined, '₱'],\n      'PKR': [undefined, 'Rs', 2],\n      'PLN': [undefined, 'zł'],\n      'PYG': [undefined, '₲', 0],\n      'RON': [undefined, 'lei'],\n      'RSD': [undefined, undefined, 0],\n      'RUB': [undefined, '₽'],\n      'RUR': [undefined, 'р.'],\n      'RWF': [undefined, 'RF', 0],\n      'SBD': [undefined, '$'],\n      'SEK': [undefined, 'kr', 2],\n      'SGD': [undefined, '$'],\n      'SHP': [undefined, '£'],\n      'SLL': [undefined, undefined, 0],\n      'SOS': [undefined, undefined, 0],\n      'SRD': [undefined, '$'],\n      'SSP': [undefined, '£'],\n      'STD': [undefined, undefined, 0],\n      'STN': [undefined, 'Db'],\n      'SYP': [undefined, '£', 0],\n      'THB': [undefined, '฿'],\n      'TMM': [undefined, undefined, 0],\n      'TND': [undefined, undefined, 3],\n      'TOP': [undefined, 'T$'],\n      'TRL': [undefined, undefined, 0],\n      'TRY': [undefined, '₺'],\n      'TTD': [undefined, '$'],\n      'TWD': ['NT$', '$', 2],\n      'TZS': [undefined, undefined, 2],\n      'UAH': [undefined, '₴'],\n      'UGX': [undefined, undefined, 0],\n      'USD': ['$'],\n      'UYI': [undefined, undefined, 0],\n      'UYU': [undefined, '$'],\n      'UYW': [undefined, undefined, 4],\n      'UZS': [undefined, undefined, 2],\n      'VEF': [undefined, 'Bs', 2],\n      'VND': ['₫', undefined, 0],\n      'VUV': [undefined, undefined, 0],\n      'XAF': ['FCFA', undefined, 0],\n      'XCD': ['EC$', '$'],\n      'XOF': ['CFA', undefined, 0],\n      'XPF': ['CFPF', undefined, 0],\n      'XXX': ['¤'],\n      'YER': [undefined, undefined, 0],\n      'ZAR': [undefined, 'R'],\n      'ZMK': [undefined, undefined, 0],\n      'ZMW': [undefined, 'ZK'],\n      'ZWD': [undefined, undefined, 0]\n    };\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ɵCurrencyIndex, ɵExtraLocaleDataIndex, ɵfindLocaleData, ɵgetLocaleCurrencyCode, ɵgetLocalePluralCase, ɵLocaleDataIndex} from '@angular/core';\n\nimport {CURRENCIES_EN, CurrenciesSymbols} from './currencies';\n\n\n/**\n * Format styles that can be used to represent numbers.\n * @see `getLocaleNumberFormat()`.\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport enum NumberFormatStyle {\n  Decimal,\n  Percent,\n  Currency,\n  Scientific\n}\n\n/**\n * Plurality cases used for translating plurals to different languages.\n *\n * @see `NgPlural`\n * @see `NgPluralCase`\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport enum Plural {\n  Zero = 0,\n  One = 1,\n  Two = 2,\n  Few = 3,\n  Many = 4,\n  Other = 5,\n}\n\n/**\n * Context-dependant translation forms for strings.\n * Typically the standalone version is for the nominative form of the word,\n * and the format version is used for the genitive case.\n * @see [CLDR website](http://cldr.unicode.org/translation/date-time-1/date-time#TOC-Standalone-vs.-Format-Styles)\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport enum FormStyle {\n  Format,\n  Standalone\n}\n\n/**\n * String widths available for translations.\n * The specific character widths are locale-specific.\n * Examples are given for the word \"Sunday\" in English.\n *\n * @publicApi\n */\nexport enum TranslationWidth {\n  /** 1 character for `en-US`. For example: 'S' */\n  Narrow,\n  /** 3 characters for `en-US`. For example: 'Sun' */\n  Abbreviated,\n  /** Full length for `en-US`. For example: \"Sunday\" */\n  Wide,\n  /** 2 characters for `en-US`, For example: \"Su\" */\n  Short\n}\n\n/**\n * String widths available for date-time formats.\n * The specific character widths are locale-specific.\n * Examples are given for `en-US`.\n *\n * @see `getLocaleDateFormat()`\n * @see `getLocaleTimeFormat()``\n * @see `getLocaleDateTimeFormat()`\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n * @publicApi\n */\nexport enum FormatWidth {\n  /**\n   * For `en-US`, 'M/d/yy, h:mm a'`\n   * (Example: `6/15/15, 9:03 AM`)\n   */\n  Short,\n  /**\n   * For `en-US`, `'MMM d, y, h:mm:ss a'`\n   * (Example: `Jun 15, 2015, 9:03:01 AM`)\n   */\n  Medium,\n  /**\n   * For `en-US`, `'MMMM d, y, h:mm:ss a z'`\n   * (Example: `June 15, 2015 at 9:03:01 AM GMT+1`)\n   */\n  Long,\n  /**\n   * For `en-US`, `'EEEE, MMMM d, y, h:mm:ss a zzzz'`\n   * (Example: `Monday, June 15, 2015 at 9:03:01 AM GMT+01:00`)\n   */\n  Full\n}\n\n/**\n * Symbols that can be used to replace placeholders in number patterns.\n * Examples are based on `en-US` values.\n *\n * @see `getLocaleNumberSymbol()`\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport enum NumberSymbol {\n  /**\n   * Decimal separator.\n   * For `en-US`, the dot character.\n   * Example : 2,345`.`67\n   */\n  Decimal,\n  /**\n   * Grouping separator, typically for thousands.\n   * For `en-US`, the comma character.\n   * Example: 2`,`345.67\n   */\n  Group,\n  /**\n   * List-item separator.\n   * Example: \"one, two, and three\"\n   */\n  List,\n  /**\n   * Sign for percentage (out of 100).\n   * Example: 23.4%\n   */\n  PercentSign,\n  /**\n   * Sign for positive numbers.\n   * Example: +23\n   */\n  PlusSign,\n  /**\n   * Sign for negative numbers.\n   * Example: -23\n   */\n  MinusSign,\n  /**\n   * Computer notation for exponential value (n times a power of 10).\n   * Example: 1.2E3\n   */\n  Exponential,\n  /**\n   * Human-readable format of exponential.\n   * Example: 1.2x103\n   */\n  SuperscriptingExponent,\n  /**\n   * Sign for permille (out of 1000).\n   * Example: 23.4‰\n   */\n  PerMille,\n  /**\n   * Infinity, can be used with plus and minus.\n   * Example: ∞, +∞, -∞\n   */\n  Infinity,\n  /**\n   * Not a number.\n   * Example: NaN\n   */\n  NaN,\n  /**\n   * Symbol used between time units.\n   * Example: 10:52\n   */\n  TimeSeparator,\n  /**\n   * Decimal separator for currency values (fallback to `Decimal`).\n   * Example: $2,345.67\n   */\n  CurrencyDecimal,\n  /**\n   * Group separator for currency values (fallback to `Group`).\n   * Example: $2,345.67\n   */\n  CurrencyGroup\n}\n\n/**\n * The value for each day of the week, based on the `en-US` locale\n *\n * @publicApi\n */\nexport enum WeekDay {\n  Sunday = 0,\n  Monday,\n  Tuesday,\n  Wednesday,\n  Thursday,\n  Friday,\n  Saturday\n}\n\n/**\n * Retrieves the locale ID from the currently loaded locale.\n * The loaded locale could be, for example, a global one rather than a regional one.\n * @param locale A locale code, such as `fr-FR`.\n * @returns The locale code. For example, `fr`.\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport function getLocaleId(locale: string): string {\n  return ɵfindLocaleData(locale)[ɵLocaleDataIndex.LocaleId];\n}\n\n/**\n * Retrieves day period strings for the given locale.\n *\n * @param locale A locale code for the locale format rules to use.\n * @param formStyle The required grammatical form.\n * @param width The required character width.\n * @returns An array of localized period strings. For example, `[AM, PM]` for `en-US`.\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport function getLocaleDayPeriods(\n    locale: string, formStyle: FormStyle, width: TranslationWidth): [string, string] {\n  const data = ɵfindLocaleData(locale);\n  const amPmData = <[string, string][][]>[\n    data[ɵLocaleDataIndex.DayPeriodsFormat], data[ɵLocaleDataIndex.DayPeriodsStandalone]\n  ];\n  const amPm = getLastDefinedValue(amPmData, formStyle);\n  return getLastDefinedValue(amPm, width);\n}\n\n/**\n * Retrieves days of the week for the given locale, using the Gregorian calendar.\n *\n * @param locale A locale code for the locale format rules to use.\n * @param formStyle The required grammatical form.\n * @param width The required character width.\n * @returns An array of localized name strings.\n * For example,`[Sunday, Monday, ... Saturday]` for `en-US`.\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport function getLocaleDayNames(\n    locale: string, formStyle: FormStyle, width: TranslationWidth): string[] {\n  const data = ɵfindLocaleData(locale);\n  const daysData =\n      <string[][][]>[data[ɵLocaleDataIndex.DaysFormat], data[ɵLocaleDataIndex.DaysStandalone]];\n  const days = getLastDefinedValue(daysData, formStyle);\n  return getLastDefinedValue(days, width);\n}\n\n/**\n * Retrieves months of the year for the given locale, using the Gregorian calendar.\n *\n * @param locale A locale code for the locale format rules to use.\n * @param formStyle The required grammatical form.\n * @param width The required character width.\n * @returns An array of localized name strings.\n * For example,  `[January, February, ...]` for `en-US`.\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport function getLocaleMonthNames(\n    locale: string, formStyle: FormStyle, width: TranslationWidth): string[] {\n  const data = ɵfindLocaleData(locale);\n  const monthsData =\n      <string[][][]>[data[ɵLocaleDataIndex.MonthsFormat], data[ɵLocaleDataIndex.MonthsStandalone]];\n  const months = getLastDefinedValue(monthsData, formStyle);\n  return getLastDefinedValue(months, width);\n}\n\n/**\n * Retrieves Gregorian-calendar eras for the given locale.\n * @param locale A locale code for the locale format rules to use.\n * @param formStyle The required grammatical form.\n * @param width The required character width.\n\n * @returns An array of localized era strings.\n * For example, `[AD, BC]` for `en-US`.\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport function getLocaleEraNames(locale: string, width: TranslationWidth): [string, string] {\n  const data = ɵfindLocaleData(locale);\n  const erasData = <[string, string][]>data[ɵLocaleDataIndex.Eras];\n  return getLastDefinedValue(erasData, width);\n}\n\n/**\n * Retrieves the first day of the week for the given locale.\n *\n * @param locale A locale code for the locale format rules to use.\n * @returns A day index number, using the 0-based week-day index for `en-US`\n * (Sunday = 0, Monday = 1, ...).\n * For example, for `fr-FR`, returns 1 to indicate that the first day is Monday.\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport function getLocaleFirstDayOfWeek(locale: string): WeekDay {\n  const data = ɵfindLocaleData(locale);\n  return data[ɵLocaleDataIndex.FirstDayOfWeek];\n}\n\n/**\n * Range of week days that are considered the week-end for the given locale.\n *\n * @param locale A locale code for the locale format rules to use.\n * @returns The range of day values, `[startDay, endDay]`.\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport function getLocaleWeekEndRange(locale: string): [WeekDay, WeekDay] {\n  const data = ɵfindLocaleData(locale);\n  return data[ɵLocaleDataIndex.WeekendRange];\n}\n\n/**\n * Retrieves a localized date-value formating string.\n *\n * @param locale A locale code for the locale format rules to use.\n * @param width The format type.\n * @returns The localized formating string.\n * @see `FormatWidth`\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport function getLocaleDateFormat(locale: string, width: FormatWidth): string {\n  const data = ɵfindLocaleData(locale);\n  return getLastDefinedValue(data[ɵLocaleDataIndex.DateFormat], width);\n}\n\n/**\n * Retrieves a localized time-value formatting string.\n *\n * @param locale A locale code for the locale format rules to use.\n * @param width The format type.\n * @returns The localized formatting string.\n * @see `FormatWidth`\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n\n * @publicApi\n */\nexport function getLocaleTimeFormat(locale: string, width: FormatWidth): string {\n  const data = ɵfindLocaleData(locale);\n  return getLastDefinedValue(data[ɵLocaleDataIndex.TimeFormat], width);\n}\n\n/**\n * Retrieves a localized date-time formatting string.\n *\n * @param locale A locale code for the locale format rules to use.\n * @param width The format type.\n * @returns The localized formatting string.\n * @see `FormatWidth`\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport function getLocaleDateTimeFormat(locale: string, width: FormatWidth): string {\n  const data = ɵfindLocaleData(locale);\n  const dateTimeFormatData = <string[]>data[ɵLocaleDataIndex.DateTimeFormat];\n  return getLastDefinedValue(dateTimeFormatData, width);\n}\n\n/**\n * Retrieves a localized number symbol that can be used to replace placeholders in number formats.\n * @param locale The locale code.\n * @param symbol The symbol to localize.\n * @returns The character for the localized symbol.\n * @see `NumberSymbol`\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport function getLocaleNumberSymbol(locale: string, symbol: NumberSymbol): string {\n  const data = ɵfindLocaleData(locale);\n  const res = data[ɵLocaleDataIndex.NumberSymbols][symbol];\n  if (typeof res === 'undefined') {\n    if (symbol === NumberSymbol.CurrencyDecimal) {\n      return data[ɵLocaleDataIndex.NumberSymbols][NumberSymbol.Decimal];\n    } else if (symbol === NumberSymbol.CurrencyGroup) {\n      return data[ɵLocaleDataIndex.NumberSymbols][NumberSymbol.Group];\n    }\n  }\n  return res;\n}\n\n/**\n * Retrieves a number format for a given locale.\n *\n * Numbers are formatted using patterns, like `#,###.00`. For example, the pattern `#,###.00`\n * when used to format the number 12345.678 could result in \"12'345,678\". That would happen if the\n * grouping separator for your language is an apostrophe, and the decimal separator is a comma.\n *\n * <b>Important:</b> The characters `.` `,` `0` `#` (and others below) are special placeholders\n * that stand for the decimal separator, and so on, and are NOT real characters.\n * You must NOT \"translate\" the placeholders. For example, don't change `.` to `,` even though in\n * your language the decimal point is written with a comma. The symbols should be replaced by the\n * local equivalents, using the appropriate `NumberSymbol` for your language.\n *\n * Here are the special characters used in number patterns:\n *\n * | Symbol | Meaning |\n * |--------|---------|\n * | . | Replaced automatically by the character used for the decimal point. |\n * | , | Replaced by the \"grouping\" (thousands) separator. |\n * | 0 | Replaced by a digit (or zero if there aren't enough digits). |\n * | # | Replaced by a digit (or nothing if there aren't enough). |\n * | ¤ | Replaced by a currency symbol, such as $ or USD. |\n * | % | Marks a percent format. The % symbol may change position, but must be retained. |\n * | E | Marks a scientific format. The E symbol may change position, but must be retained. |\n * | ' | Special characters used as literal characters are quoted with ASCII single quotes. |\n *\n * @param locale A locale code for the locale format rules to use.\n * @param type The type of numeric value to be formatted (such as `Decimal` or `Currency`.)\n * @returns The localized format string.\n * @see `NumberFormatStyle`\n * @see [CLDR website](http://cldr.unicode.org/translation/number-patterns)\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport function getLocaleNumberFormat(locale: string, type: NumberFormatStyle): string {\n  const data = ɵfindLocaleData(locale);\n  return data[ɵLocaleDataIndex.NumberFormats][type];\n}\n\n/**\n * Retrieves the symbol used to represent the currency for the main country\n * corresponding to a given locale. For example, '$' for `en-US`.\n *\n * @param locale A locale code for the locale format rules to use.\n * @returns The localized symbol character,\n * or `null` if the main country cannot be determined.\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport function getLocaleCurrencySymbol(locale: string): string|null {\n  const data = ɵfindLocaleData(locale);\n  return data[ɵLocaleDataIndex.CurrencySymbol] || null;\n}\n\n/**\n * Retrieves the name of the currency for the main country corresponding\n * to a given locale. For example, 'US Dollar' for `en-US`.\n * @param locale A locale code for the locale format rules to use.\n * @returns The currency name,\n * or `null` if the main country cannot be determined.\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport function getLocaleCurrencyName(locale: string): string|null {\n  const data = ɵfindLocaleData(locale);\n  return data[ɵLocaleDataIndex.CurrencyName] || null;\n}\n\n/**\n * Retrieves the default currency code for the given locale.\n *\n * The default is defined as the first currency which is still in use.\n *\n * @param locale The code of the locale whose currency code we want.\n * @returns The code of the default currency for the given locale.\n *\n * @publicApi\n */\nexport function getLocaleCurrencyCode(locale: string): string|null {\n  return ɵgetLocaleCurrencyCode(locale);\n}\n\n/**\n * Retrieves the currency values for a given locale.\n * @param locale A locale code for the locale format rules to use.\n * @returns The currency values.\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n */\nfunction getLocaleCurrencies(locale: string): {[code: string]: CurrenciesSymbols} {\n  const data = ɵfindLocaleData(locale);\n  return data[ɵLocaleDataIndex.Currencies];\n}\n\n/**\n * @alias core/ɵgetLocalePluralCase\n * @publicApi\n */\nexport const getLocalePluralCase: (locale: string) => ((value: number) => Plural) =\n    ɵgetLocalePluralCase;\n\nfunction checkFullData(data: any) {\n  if (!data[ɵLocaleDataIndex.ExtraData]) {\n    throw new Error(`Missing extra locale data for the locale \"${\n        data[ɵLocaleDataIndex\n                 .LocaleId]}\". Use \"registerLocaleData\" to load new data. See the \"I18n guide\" on angular.io to know more.`);\n  }\n}\n\n/**\n * Retrieves locale-specific rules used to determine which day period to use\n * when more than one period is defined for a locale.\n *\n * There is a rule for each defined day period. The\n * first rule is applied to the first day period and so on.\n * Fall back to AM/PM when no rules are available.\n *\n * A rule can specify a period as time range, or as a single time value.\n *\n * This functionality is only available when you have loaded the full locale data.\n * See the [\"I18n guide\"](guide/i18n#i18n-pipes).\n *\n * @param locale A locale code for the locale format rules to use.\n * @returns The rules for the locale, a single time value or array of *from-time, to-time*,\n * or null if no periods are available.\n *\n * @see `getLocaleExtraDayPeriods()`\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport function getLocaleExtraDayPeriodRules(locale: string): (Time|[Time, Time])[] {\n  const data = ɵfindLocaleData(locale);\n  checkFullData(data);\n  const rules = data[ɵLocaleDataIndex.ExtraData][ɵExtraLocaleDataIndex.ExtraDayPeriodsRules] || [];\n  return rules.map((rule: string|[string, string]) => {\n    if (typeof rule === 'string') {\n      return extractTime(rule);\n    }\n    return [extractTime(rule[0]), extractTime(rule[1])];\n  });\n}\n\n/**\n * Retrieves locale-specific day periods, which indicate roughly how a day is broken up\n * in different languages.\n * For example, for `en-US`, periods are morning, noon, afternoon, evening, and midnight.\n *\n * This functionality is only available when you have loaded the full locale data.\n * See the [\"I18n guide\"](guide/i18n#i18n-pipes).\n *\n * @param locale A locale code for the locale format rules to use.\n * @param formStyle The required grammatical form.\n * @param width The required character width.\n * @returns The translated day-period strings.\n * @see `getLocaleExtraDayPeriodRules()`\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport function getLocaleExtraDayPeriods(\n    locale: string, formStyle: FormStyle, width: TranslationWidth): string[] {\n  const data = ɵfindLocaleData(locale);\n  checkFullData(data);\n  const dayPeriodsData = <string[][][]>[\n    data[ɵLocaleDataIndex.ExtraData][ɵExtraLocaleDataIndex.ExtraDayPeriodFormats],\n    data[ɵLocaleDataIndex.ExtraData][ɵExtraLocaleDataIndex.ExtraDayPeriodStandalone]\n  ];\n  const dayPeriods = getLastDefinedValue(dayPeriodsData, formStyle) || [];\n  return getLastDefinedValue(dayPeriods, width) || [];\n}\n\n/**\n * Retrieves the writing direction of a specified locale\n * @param locale A locale code for the locale format rules to use.\n * @publicApi\n * @returns 'rtl' or 'ltr'\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n */\nexport function getLocaleDirection(locale: string): 'ltr'|'rtl' {\n  const data = ɵfindLocaleData(locale);\n  return data[ɵLocaleDataIndex.Directionality];\n}\n\n/**\n * Retrieves the first value that is defined in an array, going backwards from an index position.\n *\n * To avoid repeating the same data (as when the \"format\" and \"standalone\" forms are the same)\n * add the first value to the locale data arrays, and add other values only if they are different.\n *\n * @param data The data array to retrieve from.\n * @param index A 0-based index into the array to start from.\n * @returns The value immediately before the given index position.\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nfunction getLastDefinedValue<T>(data: T[], index: number): T {\n  for (let i = index; i > -1; i--) {\n    if (typeof data[i] !== 'undefined') {\n      return data[i];\n    }\n  }\n  throw new Error('Locale data API: locale data undefined');\n}\n\n/**\n * Represents a time value with hours and minutes.\n *\n * @publicApi\n */\nexport type Time = {\n  hours: number,\n  minutes: number\n};\n\n/**\n * Extracts the hours and minutes from a string like \"15:45\"\n */\nfunction extractTime(time: string): Time {\n  const [h, m] = time.split(':');\n  return {hours: +h, minutes: +m};\n}\n\n\n\n/**\n * Retrieves the currency symbol for a given currency code.\n *\n * For example, for the default `en-US` locale, the code `USD` can\n * be represented by the narrow symbol `$` or the wide symbol `US$`.\n *\n * @param code The currency code.\n * @param format The format, `wide` or `narrow`.\n * @param locale A locale code for the locale format rules to use.\n *\n * @returns The symbol, or the currency code if no symbol is available.\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport function getCurrencySymbol(code: string, format: 'wide'|'narrow', locale = 'en'): string {\n  const currency = getLocaleCurrencies(locale)[code] || CURRENCIES_EN[code] || [];\n  const symbolNarrow = currency[ɵCurrencyIndex.SymbolNarrow];\n\n  if (format === 'narrow' && typeof symbolNarrow === 'string') {\n    return symbolNarrow;\n  }\n\n  return currency[ɵCurrencyIndex.Symbol] || code;\n}\n\n// Most currencies have cents, that's why the default is 2\nconst DEFAULT_NB_OF_CURRENCY_DIGITS = 2;\n\n/**\n * Reports the number of decimal digits for a given currency.\n * The value depends upon the presence of cents in that particular currency.\n *\n * @param code The currency code.\n * @returns The number of decimal digits, typically 0 or 2.\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport function getNumberOfCurrencyDigits(code: string): number {\n  let digits;\n  const currency = CURRENCIES_EN[code];\n  if (currency) {\n    digits = currency[ɵCurrencyIndex.NbOfDigits];\n  }\n  return typeof digits === 'number' ? digits : DEFAULT_NB_OF_CURRENCY_DIGITS;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {FormatWidth, FormStyle, getLocaleDateFormat, getLocaleDateTimeFormat, getLocaleDayNames, getLocaleDayPeriods, getLocaleEraNames, getLocaleExtraDayPeriodRules, getLocaleExtraDayPeriods, getLocaleId, getLocaleMonthNames, getLocaleNumberSymbol, getLocaleTimeFormat, NumberSymbol, Time, TranslationWidth} from './locale_data_api';\n\nexport const ISO8601_DATE_REGEX =\n    /^(\\d{4})-?(\\d\\d)-?(\\d\\d)(?:T(\\d\\d)(?::?(\\d\\d)(?::?(\\d\\d)(?:\\.(\\d+))?)?)?(Z|([+-])(\\d\\d):?(\\d\\d))?)?$/;\n//    1        2       3         4          5          6          7          8  9     10      11\nconst NAMED_FORMATS: {[localeId: string]: {[format: string]: string}} = {};\nconst DATE_FORMATS_SPLIT =\n    /((?:[^GyMLwWdEabBhHmsSzZO']+)|(?:'(?:[^']|'')*')|(?:G{1,5}|y{1,4}|M{1,5}|L{1,5}|w{1,2}|W{1}|d{1,2}|E{1,6}|a{1,5}|b{1,5}|B{1,5}|h{1,2}|H{1,2}|m{1,2}|s{1,2}|S{1,3}|z{1,4}|Z{1,5}|O{1,4}))([\\s\\S]*)/;\n\nenum ZoneWidth {\n  Short,\n  ShortGMT,\n  Long,\n  Extended\n}\n\nenum DateType {\n  FullYear,\n  Month,\n  Date,\n  Hours,\n  Minutes,\n  Seconds,\n  FractionalSeconds,\n  Day\n}\n\nenum TranslationType {\n  DayPeriods,\n  Days,\n  Months,\n  Eras\n}\n\n/**\n * @ngModule CommonModule\n * @description\n *\n * Formats a date according to locale rules.\n *\n * @param value The date to format, as a Date, or a number (milliseconds since UTC epoch)\n * or an [ISO date-time string](https://www.w3.org/TR/NOTE-datetime).\n * @param format The date-time components to include. See `DatePipe` for details.\n * @param locale A locale code for the locale format rules to use.\n * @param timezone The time zone. A time zone offset from GMT (such as `'+0430'`),\n * or a standard UTC/GMT or continental US time zone abbreviation.\n * If not specified, uses host system settings.\n *\n * @returns The formatted date string.\n *\n * @see `DatePipe`\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport function formatDate(\n    value: string|number|Date, format: string, locale: string, timezone?: string): string {\n  let date = toDate(value);\n  const namedFormat = getNamedFormat(locale, format);\n  format = namedFormat || format;\n\n  let parts: string[] = [];\n  let match;\n  while (format) {\n    match = DATE_FORMATS_SPLIT.exec(format);\n    if (match) {\n      parts = parts.concat(match.slice(1));\n      const part = parts.pop();\n      if (!part) {\n        break;\n      }\n      format = part;\n    } else {\n      parts.push(format);\n      break;\n    }\n  }\n\n  let dateTimezoneOffset = date.getTimezoneOffset();\n  if (timezone) {\n    dateTimezoneOffset = timezoneToOffset(timezone, dateTimezoneOffset);\n    date = convertTimezoneToLocal(date, timezone, true);\n  }\n\n  let text = '';\n  parts.forEach(value => {\n    const dateFormatter = getDateFormatter(value);\n    text += dateFormatter ?\n        dateFormatter(date, locale, dateTimezoneOffset) :\n        value === '\\'\\'' ? '\\'' : value.replace(/(^'|'$)/g, '').replace(/''/g, '\\'');\n  });\n\n  return text;\n}\n\nfunction getNamedFormat(locale: string, format: string): string {\n  const localeId = getLocaleId(locale);\n  NAMED_FORMATS[localeId] = NAMED_FORMATS[localeId] || {};\n\n  if (NAMED_FORMATS[localeId][format]) {\n    return NAMED_FORMATS[localeId][format];\n  }\n\n  let formatValue = '';\n  switch (format) {\n    case 'shortDate':\n      formatValue = getLocaleDateFormat(locale, FormatWidth.Short);\n      break;\n    case 'mediumDate':\n      formatValue = getLocaleDateFormat(locale, FormatWidth.Medium);\n      break;\n    case 'longDate':\n      formatValue = getLocaleDateFormat(locale, FormatWidth.Long);\n      break;\n    case 'fullDate':\n      formatValue = getLocaleDateFormat(locale, FormatWidth.Full);\n      break;\n    case 'shortTime':\n      formatValue = getLocaleTimeFormat(locale, FormatWidth.Short);\n      break;\n    case 'mediumTime':\n      formatValue = getLocaleTimeFormat(locale, FormatWidth.Medium);\n      break;\n    case 'longTime':\n      formatValue = getLocaleTimeFormat(locale, FormatWidth.Long);\n      break;\n    case 'fullTime':\n      formatValue = getLocaleTimeFormat(locale, FormatWidth.Full);\n      break;\n    case 'short':\n      const shortTime = getNamedFormat(locale, 'shortTime');\n      const shortDate = getNamedFormat(locale, 'shortDate');\n      formatValue = formatDateTime(\n          getLocaleDateTimeFormat(locale, FormatWidth.Short), [shortTime, shortDate]);\n      break;\n    case 'medium':\n      const mediumTime = getNamedFormat(locale, 'mediumTime');\n      const mediumDate = getNamedFormat(locale, 'mediumDate');\n      formatValue = formatDateTime(\n          getLocaleDateTimeFormat(locale, FormatWidth.Medium), [mediumTime, mediumDate]);\n      break;\n    case 'long':\n      const longTime = getNamedFormat(locale, 'longTime');\n      const longDate = getNamedFormat(locale, 'longDate');\n      formatValue =\n          formatDateTime(getLocaleDateTimeFormat(locale, FormatWidth.Long), [longTime, longDate]);\n      break;\n    case 'full':\n      const fullTime = getNamedFormat(locale, 'fullTime');\n      const fullDate = getNamedFormat(locale, 'fullDate');\n      formatValue =\n          formatDateTime(getLocaleDateTimeFormat(locale, FormatWidth.Full), [fullTime, fullDate]);\n      break;\n  }\n  if (formatValue) {\n    NAMED_FORMATS[localeId][format] = formatValue;\n  }\n  return formatValue;\n}\n\nfunction formatDateTime(str: string, opt_values: string[]) {\n  if (opt_values) {\n    str = str.replace(/\\{([^}]+)}/g, function(match, key) {\n      return (opt_values != null && key in opt_values) ? opt_values[key] : match;\n    });\n  }\n  return str;\n}\n\nfunction padNumber(\n    num: number, digits: number, minusSign = '-', trim?: boolean, negWrap?: boolean): string {\n  let neg = '';\n  if (num < 0 || (negWrap && num <= 0)) {\n    if (negWrap) {\n      num = -num + 1;\n    } else {\n      num = -num;\n      neg = minusSign;\n    }\n  }\n  let strNum = String(num);\n  while (strNum.length < digits) {\n    strNum = '0' + strNum;\n  }\n  if (trim) {\n    strNum = strNum.substr(strNum.length - digits);\n  }\n  return neg + strNum;\n}\n\nfunction formatFractionalSeconds(milliseconds: number, digits: number): string {\n  const strMs = padNumber(milliseconds, 3);\n  return strMs.substr(0, digits);\n}\n\n/**\n * Returns a date formatter that transforms a date into its locale digit representation\n */\nfunction dateGetter(\n    name: DateType, size: number, offset: number = 0, trim = false,\n    negWrap = false): DateFormatter {\n  return function(date: Date, locale: string): string {\n    let part = getDatePart(name, date);\n    if (offset > 0 || part > -offset) {\n      part += offset;\n    }\n\n    if (name === DateType.Hours) {\n      if (part === 0 && offset === -12) {\n        part = 12;\n      }\n    } else if (name === DateType.FractionalSeconds) {\n      return formatFractionalSeconds(part, size);\n    }\n\n    const localeMinus = getLocaleNumberSymbol(locale, NumberSymbol.MinusSign);\n    return padNumber(part, size, localeMinus, trim, negWrap);\n  };\n}\n\nfunction getDatePart(part: DateType, date: Date): number {\n  switch (part) {\n    case DateType.FullYear:\n      return date.getFullYear();\n    case DateType.Month:\n      return date.getMonth();\n    case DateType.Date:\n      return date.getDate();\n    case DateType.Hours:\n      return date.getHours();\n    case DateType.Minutes:\n      return date.getMinutes();\n    case DateType.Seconds:\n      return date.getSeconds();\n    case DateType.FractionalSeconds:\n      return date.getMilliseconds();\n    case DateType.Day:\n      return date.getDay();\n    default:\n      throw new Error(`Unknown DateType value \"${part}\".`);\n  }\n}\n\n/**\n * Returns a date formatter that transforms a date into its locale string representation\n */\nfunction dateStrGetter(\n    name: TranslationType, width: TranslationWidth, form: FormStyle = FormStyle.Format,\n    extended = false): DateFormatter {\n  return function(date: Date, locale: string): string {\n    return getDateTranslation(date, locale, name, width, form, extended);\n  };\n}\n\n/**\n * Returns the locale translation of a date for a given form, type and width\n */\nfunction getDateTranslation(\n    date: Date, locale: string, name: TranslationType, width: TranslationWidth, form: FormStyle,\n    extended: boolean) {\n  switch (name) {\n    case TranslationType.Months:\n      return getLocaleMonthNames(locale, form, width)[date.getMonth()];\n    case TranslationType.Days:\n      return getLocaleDayNames(locale, form, width)[date.getDay()];\n    case TranslationType.DayPeriods:\n      const currentHours = date.getHours();\n      const currentMinutes = date.getMinutes();\n      if (extended) {\n        const rules = getLocaleExtraDayPeriodRules(locale);\n        const dayPeriods = getLocaleExtraDayPeriods(locale, form, width);\n        const index = rules.findIndex(rule => {\n          if (Array.isArray(rule)) {\n            // morning, afternoon, evening, night\n            const [from, to] = rule;\n            const afterFrom = currentHours >= from.hours && currentMinutes >= from.minutes;\n            const beforeTo =\n                (currentHours < to.hours ||\n                 (currentHours === to.hours && currentMinutes < to.minutes));\n            // We must account for normal rules that span a period during the day (e.g. 6am-9am)\n            // where `from` is less (earlier) than `to`. But also rules that span midnight (e.g.\n            // 10pm - 5am) where `from` is greater (later!) than `to`.\n            //\n            // In the first case the current time must be BOTH after `from` AND before `to`\n            // (e.g. 8am is after 6am AND before 10am).\n            //\n            // In the second case the current time must be EITHER after `from` OR before `to`\n            // (e.g. 4am is before 5am but not after 10pm; and 11pm is not before 5am but it is\n            // after 10pm).\n            if (from.hours < to.hours) {\n              if (afterFrom && beforeTo) {\n                return true;\n              }\n            } else if (afterFrom || beforeTo) {\n              return true;\n            }\n          } else {  // noon or midnight\n            if (rule.hours === currentHours && rule.minutes === currentMinutes) {\n              return true;\n            }\n          }\n          return false;\n        });\n        if (index !== -1) {\n          return dayPeriods[index];\n        }\n      }\n      // if no rules for the day periods, we use am/pm by default\n      return getLocaleDayPeriods(locale, form, <TranslationWidth>width)[currentHours < 12 ? 0 : 1];\n    case TranslationType.Eras:\n      return getLocaleEraNames(locale, <TranslationWidth>width)[date.getFullYear() <= 0 ? 0 : 1];\n    default:\n      // This default case is not needed by TypeScript compiler, as the switch is exhaustive.\n      // However Closure Compiler does not understand that and reports an error in typed mode.\n      // The `throw new Error` below works around the problem, and the unexpected: never variable\n      // makes sure tsc still checks this code is unreachable.\n      const unexpected: never = name;\n      throw new Error(`unexpected translation type ${unexpected}`);\n  }\n}\n\n/**\n * Returns a date formatter that transforms a date and an offset into a timezone with ISO8601 or\n * GMT format depending on the width (eg: short = +0430, short:GMT = GMT+4, long = GMT+04:30,\n * extended = +04:30)\n */\nfunction timeZoneGetter(width: ZoneWidth): DateFormatter {\n  return function(date: Date, locale: string, offset: number) {\n    const zone = -1 * offset;\n    const minusSign = getLocaleNumberSymbol(locale, NumberSymbol.MinusSign);\n    const hours = zone > 0 ? Math.floor(zone / 60) : Math.ceil(zone / 60);\n    switch (width) {\n      case ZoneWidth.Short:\n        return ((zone >= 0) ? '+' : '') + padNumber(hours, 2, minusSign) +\n            padNumber(Math.abs(zone % 60), 2, minusSign);\n      case ZoneWidth.ShortGMT:\n        return 'GMT' + ((zone >= 0) ? '+' : '') + padNumber(hours, 1, minusSign);\n      case ZoneWidth.Long:\n        return 'GMT' + ((zone >= 0) ? '+' : '') + padNumber(hours, 2, minusSign) + ':' +\n            padNumber(Math.abs(zone % 60), 2, minusSign);\n      case ZoneWidth.Extended:\n        if (offset === 0) {\n          return 'Z';\n        } else {\n          return ((zone >= 0) ? '+' : '') + padNumber(hours, 2, minusSign) + ':' +\n              padNumber(Math.abs(zone % 60), 2, minusSign);\n        }\n      default:\n        throw new Error(`Unknown zone width \"${width}\"`);\n    }\n  };\n}\n\nconst JANUARY = 0;\nconst THURSDAY = 4;\nfunction getFirstThursdayOfYear(year: number) {\n  const firstDayOfYear = (new Date(year, JANUARY, 1)).getDay();\n  return new Date(\n      year, 0, 1 + ((firstDayOfYear <= THURSDAY) ? THURSDAY : THURSDAY + 7) - firstDayOfYear);\n}\n\nfunction getThursdayThisWeek(datetime: Date) {\n  return new Date(\n      datetime.getFullYear(), datetime.getMonth(),\n      datetime.getDate() + (THURSDAY - datetime.getDay()));\n}\n\nfunction weekGetter(size: number, monthBased = false): DateFormatter {\n  return function(date: Date, locale: string) {\n    let result;\n    if (monthBased) {\n      const nbDaysBefore1stDayOfMonth =\n          new Date(date.getFullYear(), date.getMonth(), 1).getDay() - 1;\n      const today = date.getDate();\n      result = 1 + Math.floor((today + nbDaysBefore1stDayOfMonth) / 7);\n    } else {\n      const thisThurs = getThursdayThisWeek(date);\n      // Some days of a year are part of next year according to ISO 8601.\n      // Compute the firstThurs from the year of this week's Thursday\n      const firstThurs = getFirstThursdayOfYear(thisThurs.getFullYear());\n      const diff = thisThurs.getTime() - firstThurs.getTime();\n      result = 1 + Math.round(diff / 6.048e8);  // 6.048e8 ms per week\n    }\n\n    return padNumber(result, size, getLocaleNumberSymbol(locale, NumberSymbol.MinusSign));\n  };\n}\n\ntype DateFormatter = (date: Date, locale: string, offset: number) => string;\n\nconst DATE_FORMATS: {[format: string]: DateFormatter} = {};\n\n// Based on CLDR formats:\n// See complete list: http://www.unicode.org/reports/tr35/tr35-dates.html#Date_Field_Symbol_Table\n// See also explanations: http://cldr.unicode.org/translation/date-time\n// TODO(ocombe): support all missing cldr formats: Y, U, Q, D, F, e, c, j, J, C, A, v, V, X, x\nfunction getDateFormatter(format: string): DateFormatter|null {\n  if (DATE_FORMATS[format]) {\n    return DATE_FORMATS[format];\n  }\n  let formatter;\n  switch (format) {\n    // Era name (AD/BC)\n    case 'G':\n    case 'GG':\n    case 'GGG':\n      formatter = dateStrGetter(TranslationType.Eras, TranslationWidth.Abbreviated);\n      break;\n    case 'GGGG':\n      formatter = dateStrGetter(TranslationType.Eras, TranslationWidth.Wide);\n      break;\n    case 'GGGGG':\n      formatter = dateStrGetter(TranslationType.Eras, TranslationWidth.Narrow);\n      break;\n\n    // 1 digit representation of the year, e.g. (AD 1 => 1, AD 199 => 199)\n    case 'y':\n      formatter = dateGetter(DateType.FullYear, 1, 0, false, true);\n      break;\n    // 2 digit representation of the year, padded (00-99). (e.g. AD 2001 => 01, AD 2010 => 10)\n    case 'yy':\n      formatter = dateGetter(DateType.FullYear, 2, 0, true, true);\n      break;\n    // 3 digit representation of the year, padded (000-999). (e.g. AD 2001 => 01, AD 2010 => 10)\n    case 'yyy':\n      formatter = dateGetter(DateType.FullYear, 3, 0, false, true);\n      break;\n    // 4 digit representation of the year (e.g. AD 1 => 0001, AD 2010 => 2010)\n    case 'yyyy':\n      formatter = dateGetter(DateType.FullYear, 4, 0, false, true);\n      break;\n\n    // Month of the year (1-12), numeric\n    case 'M':\n    case 'L':\n      formatter = dateGetter(DateType.Month, 1, 1);\n      break;\n    case 'MM':\n    case 'LL':\n      formatter = dateGetter(DateType.Month, 2, 1);\n      break;\n\n    // Month of the year (January, ...), string, format\n    case 'MMM':\n      formatter = dateStrGetter(TranslationType.Months, TranslationWidth.Abbreviated);\n      break;\n    case 'MMMM':\n      formatter = dateStrGetter(TranslationType.Months, TranslationWidth.Wide);\n      break;\n    case 'MMMMM':\n      formatter = dateStrGetter(TranslationType.Months, TranslationWidth.Narrow);\n      break;\n\n    // Month of the year (January, ...), string, standalone\n    case 'LLL':\n      formatter =\n          dateStrGetter(TranslationType.Months, TranslationWidth.Abbreviated, FormStyle.Standalone);\n      break;\n    case 'LLLL':\n      formatter =\n          dateStrGetter(TranslationType.Months, TranslationWidth.Wide, FormStyle.Standalone);\n      break;\n    case 'LLLLL':\n      formatter =\n          dateStrGetter(TranslationType.Months, TranslationWidth.Narrow, FormStyle.Standalone);\n      break;\n\n    // Week of the year (1, ... 52)\n    case 'w':\n      formatter = weekGetter(1);\n      break;\n    case 'ww':\n      formatter = weekGetter(2);\n      break;\n\n    // Week of the month (1, ...)\n    case 'W':\n      formatter = weekGetter(1, true);\n      break;\n\n    // Day of the month (1-31)\n    case 'd':\n      formatter = dateGetter(DateType.Date, 1);\n      break;\n    case 'dd':\n      formatter = dateGetter(DateType.Date, 2);\n      break;\n\n    // Day of the Week\n    case 'E':\n    case 'EE':\n    case 'EEE':\n      formatter = dateStrGetter(TranslationType.Days, TranslationWidth.Abbreviated);\n      break;\n    case 'EEEE':\n      formatter = dateStrGetter(TranslationType.Days, TranslationWidth.Wide);\n      break;\n    case 'EEEEE':\n      formatter = dateStrGetter(TranslationType.Days, TranslationWidth.Narrow);\n      break;\n    case 'EEEEEE':\n      formatter = dateStrGetter(TranslationType.Days, TranslationWidth.Short);\n      break;\n\n    // Generic period of the day (am-pm)\n    case 'a':\n    case 'aa':\n    case 'aaa':\n      formatter = dateStrGetter(TranslationType.DayPeriods, TranslationWidth.Abbreviated);\n      break;\n    case 'aaaa':\n      formatter = dateStrGetter(TranslationType.DayPeriods, TranslationWidth.Wide);\n      break;\n    case 'aaaaa':\n      formatter = dateStrGetter(TranslationType.DayPeriods, TranslationWidth.Narrow);\n      break;\n\n    // Extended period of the day (midnight, at night, ...), standalone\n    case 'b':\n    case 'bb':\n    case 'bbb':\n      formatter = dateStrGetter(\n          TranslationType.DayPeriods, TranslationWidth.Abbreviated, FormStyle.Standalone, true);\n      break;\n    case 'bbbb':\n      formatter = dateStrGetter(\n          TranslationType.DayPeriods, TranslationWidth.Wide, FormStyle.Standalone, true);\n      break;\n    case 'bbbbb':\n      formatter = dateStrGetter(\n          TranslationType.DayPeriods, TranslationWidth.Narrow, FormStyle.Standalone, true);\n      break;\n\n    // Extended period of the day (midnight, night, ...), standalone\n    case 'B':\n    case 'BB':\n    case 'BBB':\n      formatter = dateStrGetter(\n          TranslationType.DayPeriods, TranslationWidth.Abbreviated, FormStyle.Format, true);\n      break;\n    case 'BBBB':\n      formatter =\n          dateStrGetter(TranslationType.DayPeriods, TranslationWidth.Wide, FormStyle.Format, true);\n      break;\n    case 'BBBBB':\n      formatter = dateStrGetter(\n          TranslationType.DayPeriods, TranslationWidth.Narrow, FormStyle.Format, true);\n      break;\n\n    // Hour in AM/PM, (1-12)\n    case 'h':\n      formatter = dateGetter(DateType.Hours, 1, -12);\n      break;\n    case 'hh':\n      formatter = dateGetter(DateType.Hours, 2, -12);\n      break;\n\n    // Hour of the day (0-23)\n    case 'H':\n      formatter = dateGetter(DateType.Hours, 1);\n      break;\n    // Hour in day, padded (00-23)\n    case 'HH':\n      formatter = dateGetter(DateType.Hours, 2);\n      break;\n\n    // Minute of the hour (0-59)\n    case 'm':\n      formatter = dateGetter(DateType.Minutes, 1);\n      break;\n    case 'mm':\n      formatter = dateGetter(DateType.Minutes, 2);\n      break;\n\n    // Second of the minute (0-59)\n    case 's':\n      formatter = dateGetter(DateType.Seconds, 1);\n      break;\n    case 'ss':\n      formatter = dateGetter(DateType.Seconds, 2);\n      break;\n\n    // Fractional second\n    case 'S':\n      formatter = dateGetter(DateType.FractionalSeconds, 1);\n      break;\n    case 'SS':\n      formatter = dateGetter(DateType.FractionalSeconds, 2);\n      break;\n    case 'SSS':\n      formatter = dateGetter(DateType.FractionalSeconds, 3);\n      break;\n\n\n    // Timezone ISO8601 short format (-0430)\n    case 'Z':\n    case 'ZZ':\n    case 'ZZZ':\n      formatter = timeZoneGetter(ZoneWidth.Short);\n      break;\n    // Timezone ISO8601 extended format (-04:30)\n    case 'ZZZZZ':\n      formatter = timeZoneGetter(ZoneWidth.Extended);\n      break;\n\n    // Timezone GMT short format (GMT+4)\n    case 'O':\n    case 'OO':\n    case 'OOO':\n    // Should be location, but fallback to format O instead because we don't have the data yet\n    case 'z':\n    case 'zz':\n    case 'zzz':\n      formatter = timeZoneGetter(ZoneWidth.ShortGMT);\n      break;\n    // Timezone GMT long format (GMT+0430)\n    case 'OOOO':\n    case 'ZZZZ':\n    // Should be location, but fallback to format O instead because we don't have the data yet\n    case 'zzzz':\n      formatter = timeZoneGetter(ZoneWidth.Long);\n      break;\n    default:\n      return null;\n  }\n  DATE_FORMATS[format] = formatter;\n  return formatter;\n}\n\nfunction timezoneToOffset(timezone: string, fallback: number): number {\n  // Support: IE 9-11 only, Edge 13-15+\n  // IE/Edge do not \"understand\" colon (`:`) in timezone\n  timezone = timezone.replace(/:/g, '');\n  const requestedTimezoneOffset = Date.parse('Jan 01, 1970 00:00:00 ' + timezone) / 60000;\n  return isNaN(requestedTimezoneOffset) ? fallback : requestedTimezoneOffset;\n}\n\nfunction addDateMinutes(date: Date, minutes: number) {\n  date = new Date(date.getTime());\n  date.setMinutes(date.getMinutes() + minutes);\n  return date;\n}\n\nfunction convertTimezoneToLocal(date: Date, timezone: string, reverse: boolean): Date {\n  const reverseValue = reverse ? -1 : 1;\n  const dateTimezoneOffset = date.getTimezoneOffset();\n  const timezoneOffset = timezoneToOffset(timezone, dateTimezoneOffset);\n  return addDateMinutes(date, reverseValue * (timezoneOffset - dateTimezoneOffset));\n}\n\n/**\n * Converts a value to date.\n *\n * Supported input formats:\n * - `Date`\n * - number: timestamp\n * - string: numeric (e.g. \"1234\"), ISO and date strings in a format supported by\n *   [Date.parse()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/parse).\n *   Note: ISO strings without time return a date without timeoffset.\n *\n * Throws if unable to convert to a date.\n */\nexport function toDate(value: string|number|Date): Date {\n  if (isDate(value)) {\n    return value;\n  }\n\n  if (typeof value === 'number' && !isNaN(value)) {\n    return new Date(value);\n  }\n\n  if (typeof value === 'string') {\n    value = value.trim();\n\n    const parsedNb = parseFloat(value);\n\n    // any string that only contains numbers, like \"1234\" but not like \"1234hello\"\n    if (!isNaN(value as any - parsedNb)) {\n      return new Date(parsedNb);\n    }\n\n    if (/^(\\d{4}-\\d{1,2}-\\d{1,2})$/.test(value)) {\n      /* For ISO Strings without time the day, month and year must be extracted from the ISO String\n      before Date creation to avoid time offset and errors in the new Date.\n      If we only replace '-' with ',' in the ISO String (\"2015,01,01\"), and try to create a new\n      date, some browsers (e.g. IE 9) will throw an invalid Date error.\n      If we leave the '-' (\"2015-01-01\") and try to create a new Date(\"2015-01-01\") the timeoffset\n      is applied.\n      Note: ISO months are 0 for January, 1 for February, ... */\n      const [y, m, d] = value.split('-').map((val: string) => +val);\n      return new Date(y, m - 1, d);\n    }\n\n    let match: RegExpMatchArray|null;\n    if (match = value.match(ISO8601_DATE_REGEX)) {\n      return isoStringToDate(match);\n    }\n  }\n\n  const date = new Date(value as any);\n  if (!isDate(date)) {\n    throw new Error(`Unable to convert \"${value}\" into a date`);\n  }\n  return date;\n}\n\n/**\n * Converts a date in ISO8601 to a Date.\n * Used instead of `Date.parse` because of browser discrepancies.\n */\nexport function isoStringToDate(match: RegExpMatchArray): Date {\n  const date = new Date(0);\n  let tzHour = 0;\n  let tzMin = 0;\n\n  // match[8] means that the string contains \"Z\" (UTC) or a timezone like \"+01:00\" or \"+0100\"\n  const dateSetter = match[8] ? date.setUTCFullYear : date.setFullYear;\n  const timeSetter = match[8] ? date.setUTCHours : date.setHours;\n\n  // if there is a timezone defined like \"+01:00\" or \"+0100\"\n  if (match[9]) {\n    tzHour = Number(match[9] + match[10]);\n    tzMin = Number(match[9] + match[11]);\n  }\n  dateSetter.call(date, Number(match[1]), Number(match[2]) - 1, Number(match[3]));\n  const h = Number(match[4] || 0) - tzHour;\n  const m = Number(match[5] || 0) - tzMin;\n  const s = Number(match[6] || 0);\n  const ms = Math.round(parseFloat('0.' + (match[7] || 0)) * 1000);\n  timeSetter.call(date, h, m, s, ms);\n  return date;\n}\n\nexport function isDate(value: any): value is Date {\n  return value instanceof Date && !isNaN(value.valueOf());\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {getLocaleNumberFormat, getLocaleNumberSymbol, getNumberOfCurrencyDigits, NumberFormatStyle, NumberSymbol} from './locale_data_api';\n\nexport const NUMBER_FORMAT_REGEXP = /^(\\d+)?\\.((\\d+)(-(\\d+))?)?$/;\nconst MAX_DIGITS = 22;\nconst DECIMAL_SEP = '.';\nconst ZERO_CHAR = '0';\nconst PATTERN_SEP = ';';\nconst GROUP_SEP = ',';\nconst DIGIT_CHAR = '#';\nconst CURRENCY_CHAR = '¤';\nconst PERCENT_CHAR = '%';\n\n/**\n * Transforms a number to a locale string based on a style and a format.\n */\nfunction formatNumberToLocaleString(\n    value: number, pattern: ParsedNumberFormat, locale: string, groupSymbol: NumberSymbol,\n    decimalSymbol: NumberSymbol, digitsInfo?: string, isPercent = false): string {\n  let formattedText = '';\n  let isZero = false;\n\n  if (!isFinite(value)) {\n    formattedText = getLocaleNumberSymbol(locale, NumberSymbol.Infinity);\n  } else {\n    let parsedNumber = parseNumber(value);\n\n    if (isPercent) {\n      parsedNumber = toPercent(parsedNumber);\n    }\n\n    let minInt = pattern.minInt;\n    let minFraction = pattern.minFrac;\n    let maxFraction = pattern.maxFrac;\n\n    if (digitsInfo) {\n      const parts = digitsInfo.match(NUMBER_FORMAT_REGEXP);\n      if (parts === null) {\n        throw new Error(`${digitsInfo} is not a valid digit info`);\n      }\n      const minIntPart = parts[1];\n      const minFractionPart = parts[3];\n      const maxFractionPart = parts[5];\n      if (minIntPart != null) {\n        minInt = parseIntAutoRadix(minIntPart);\n      }\n      if (minFractionPart != null) {\n        minFraction = parseIntAutoRadix(minFractionPart);\n      }\n      if (maxFractionPart != null) {\n        maxFraction = parseIntAutoRadix(maxFractionPart);\n      } else if (minFractionPart != null && minFraction > maxFraction) {\n        maxFraction = minFraction;\n      }\n    }\n\n    roundNumber(parsedNumber, minFraction, maxFraction);\n\n    let digits = parsedNumber.digits;\n    let integerLen = parsedNumber.integerLen;\n    const exponent = parsedNumber.exponent;\n    let decimals = [];\n    isZero = digits.every(d => !d);\n\n    // pad zeros for small numbers\n    for (; integerLen < minInt; integerLen++) {\n      digits.unshift(0);\n    }\n\n    // pad zeros for small numbers\n    for (; integerLen < 0; integerLen++) {\n      digits.unshift(0);\n    }\n\n    // extract decimals digits\n    if (integerLen > 0) {\n      decimals = digits.splice(integerLen, digits.length);\n    } else {\n      decimals = digits;\n      digits = [0];\n    }\n\n    // format the integer digits with grouping separators\n    const groups = [];\n    if (digits.length >= pattern.lgSize) {\n      groups.unshift(digits.splice(-pattern.lgSize, digits.length).join(''));\n    }\n\n    while (digits.length > pattern.gSize) {\n      groups.unshift(digits.splice(-pattern.gSize, digits.length).join(''));\n    }\n\n    if (digits.length) {\n      groups.unshift(digits.join(''));\n    }\n\n    formattedText = groups.join(getLocaleNumberSymbol(locale, groupSymbol));\n\n    // append the decimal digits\n    if (decimals.length) {\n      formattedText += getLocaleNumberSymbol(locale, decimalSymbol) + decimals.join('');\n    }\n\n    if (exponent) {\n      formattedText += getLocaleNumberSymbol(locale, NumberSymbol.Exponential) + '+' + exponent;\n    }\n  }\n\n  if (value < 0 && !isZero) {\n    formattedText = pattern.negPre + formattedText + pattern.negSuf;\n  } else {\n    formattedText = pattern.posPre + formattedText + pattern.posSuf;\n  }\n\n  return formattedText;\n}\n\n/**\n * @ngModule CommonModule\n * @description\n *\n * Formats a number as currency using locale rules.\n *\n * @param value The number to format.\n * @param locale A locale code for the locale format rules to use.\n * @param currency A string containing the currency symbol or its name,\n * such as \"$\" or \"Canadian Dollar\". Used in output string, but does not affect the operation\n * of the function.\n * @param currencyCode The [ISO 4217](https://en.wikipedia.org/wiki/ISO_4217)\n * currency code, such as `USD` for the US dollar and `EUR` for the euro.\n * Used to determine the number of digits in the decimal part.\n * @param digitInfo Decimal representation options, specified by a string in the following format:\n * `{minIntegerDigits}.{minFractionDigits}-{maxFractionDigits}`. See `DecimalPipe` for more details.\n *\n * @returns The formatted currency value.\n *\n * @see `formatNumber()`\n * @see `DecimalPipe`\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport function formatCurrency(\n    value: number, locale: string, currency: string, currencyCode?: string,\n    digitsInfo?: string): string {\n  const format = getLocaleNumberFormat(locale, NumberFormatStyle.Currency);\n  const pattern = parseNumberFormat(format, getLocaleNumberSymbol(locale, NumberSymbol.MinusSign));\n\n  pattern.minFrac = getNumberOfCurrencyDigits(currencyCode!);\n  pattern.maxFrac = pattern.minFrac;\n\n  const res = formatNumberToLocaleString(\n      value, pattern, locale, NumberSymbol.CurrencyGroup, NumberSymbol.CurrencyDecimal, digitsInfo);\n  return res\n      .replace(CURRENCY_CHAR, currency)\n      // if we have 2 time the currency character, the second one is ignored\n      .replace(CURRENCY_CHAR, '')\n      // If there is a spacing between currency character and the value and\n      // the currency character is supressed by passing an empty string, the\n      // spacing character would remain as part of the string. Then we\n      // should remove it.\n      .trim();\n}\n\n/**\n * @ngModule CommonModule\n * @description\n *\n * Formats a number as a percentage according to locale rules.\n *\n * @param value The number to format.\n * @param locale A locale code for the locale format rules to use.\n * @param digitInfo Decimal representation options, specified by a string in the following format:\n * `{minIntegerDigits}.{minFractionDigits}-{maxFractionDigits}`. See `DecimalPipe` for more details.\n *\n * @returns The formatted percentage value.\n *\n * @see `formatNumber()`\n * @see `DecimalPipe`\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n * @publicApi\n *\n */\nexport function formatPercent(value: number, locale: string, digitsInfo?: string): string {\n  const format = getLocaleNumberFormat(locale, NumberFormatStyle.Percent);\n  const pattern = parseNumberFormat(format, getLocaleNumberSymbol(locale, NumberSymbol.MinusSign));\n  const res = formatNumberToLocaleString(\n      value, pattern, locale, NumberSymbol.Group, NumberSymbol.Decimal, digitsInfo, true);\n  return res.replace(\n      new RegExp(PERCENT_CHAR, 'g'), getLocaleNumberSymbol(locale, NumberSymbol.PercentSign));\n}\n\n/**\n * @ngModule CommonModule\n * @description\n *\n * Formats a number as text, with group sizing, separator, and other\n * parameters based on the locale.\n *\n * @param value The number to format.\n * @param locale A locale code for the locale format rules to use.\n * @param digitInfo Decimal representation options, specified by a string in the following format:\n * `{minIntegerDigits}.{minFractionDigits}-{maxFractionDigits}`. See `DecimalPipe` for more details.\n *\n * @returns The formatted text string.\n * @see [Internationalization (i18n) Guide](https://angular.io/guide/i18n)\n *\n * @publicApi\n */\nexport function formatNumber(value: number, locale: string, digitsInfo?: string): string {\n  const format = getLocaleNumberFormat(locale, NumberFormatStyle.Decimal);\n  const pattern = parseNumberFormat(format, getLocaleNumberSymbol(locale, NumberSymbol.MinusSign));\n  return formatNumberToLocaleString(\n      value, pattern, locale, NumberSymbol.Group, NumberSymbol.Decimal, digitsInfo);\n}\n\ninterface ParsedNumberFormat {\n  minInt: number;\n  // the minimum number of digits required in the fraction part of the number\n  minFrac: number;\n  // the maximum number of digits required in the fraction part of the number\n  maxFrac: number;\n  // the prefix for a positive number\n  posPre: string;\n  // the suffix for a positive number\n  posSuf: string;\n  // the prefix for a negative number (e.g. `-` or `(`))\n  negPre: string;\n  // the suffix for a negative number (e.g. `)`)\n  negSuf: string;\n  // number of digits in each group of separated digits\n  gSize: number;\n  // number of digits in the last group of digits before the decimal separator\n  lgSize: number;\n}\n\nfunction parseNumberFormat(format: string, minusSign = '-'): ParsedNumberFormat {\n  const p = {\n    minInt: 1,\n    minFrac: 0,\n    maxFrac: 0,\n    posPre: '',\n    posSuf: '',\n    negPre: '',\n    negSuf: '',\n    gSize: 0,\n    lgSize: 0\n  };\n\n  const patternParts = format.split(PATTERN_SEP);\n  const positive = patternParts[0];\n  const negative = patternParts[1];\n\n  const positiveParts = positive.indexOf(DECIMAL_SEP) !== -1 ?\n      positive.split(DECIMAL_SEP) :\n      [\n        positive.substring(0, positive.lastIndexOf(ZERO_CHAR) + 1),\n        positive.substring(positive.lastIndexOf(ZERO_CHAR) + 1)\n      ],\n        integer = positiveParts[0], fraction = positiveParts[1] || '';\n\n  p.posPre = integer.substr(0, integer.indexOf(DIGIT_CHAR));\n\n  for (let i = 0; i < fraction.length; i++) {\n    const ch = fraction.charAt(i);\n    if (ch === ZERO_CHAR) {\n      p.minFrac = p.maxFrac = i + 1;\n    } else if (ch === DIGIT_CHAR) {\n      p.maxFrac = i + 1;\n    } else {\n      p.posSuf += ch;\n    }\n  }\n\n  const groups = integer.split(GROUP_SEP);\n  p.gSize = groups[1] ? groups[1].length : 0;\n  p.lgSize = (groups[2] || groups[1]) ? (groups[2] || groups[1]).length : 0;\n\n  if (negative) {\n    const trunkLen = positive.length - p.posPre.length - p.posSuf.length,\n          pos = negative.indexOf(DIGIT_CHAR);\n\n    p.negPre = negative.substr(0, pos).replace(/'/g, '');\n    p.negSuf = negative.substr(pos + trunkLen).replace(/'/g, '');\n  } else {\n    p.negPre = minusSign + p.posPre;\n    p.negSuf = p.posSuf;\n  }\n\n  return p;\n}\n\ninterface ParsedNumber {\n  // an array of digits containing leading zeros as necessary\n  digits: number[];\n  // the exponent for numbers that would need more than `MAX_DIGITS` digits in `d`\n  exponent: number;\n  // the number of the digits in `d` that are to the left of the decimal point\n  integerLen: number;\n}\n\n// Transforms a parsed number into a percentage by multiplying it by 100\nfunction toPercent(parsedNumber: ParsedNumber): ParsedNumber {\n  // if the number is 0, don't do anything\n  if (parsedNumber.digits[0] === 0) {\n    return parsedNumber;\n  }\n\n  // Getting the current number of decimals\n  const fractionLen = parsedNumber.digits.length - parsedNumber.integerLen;\n  if (parsedNumber.exponent) {\n    parsedNumber.exponent += 2;\n  } else {\n    if (fractionLen === 0) {\n      parsedNumber.digits.push(0, 0);\n    } else if (fractionLen === 1) {\n      parsedNumber.digits.push(0);\n    }\n    parsedNumber.integerLen += 2;\n  }\n\n  return parsedNumber;\n}\n\n/**\n * Parses a number.\n * Significant bits of this parse algorithm came from https://github.com/MikeMcl/big.js/\n */\nfunction parseNumber(num: number): ParsedNumber {\n  let numStr = Math.abs(num) + '';\n  let exponent = 0, digits, integerLen;\n  let i, j, zeros;\n\n  // Decimal point?\n  if ((integerLen = numStr.indexOf(DECIMAL_SEP)) > -1) {\n    numStr = numStr.replace(DECIMAL_SEP, '');\n  }\n\n  // Exponential form?\n  if ((i = numStr.search(/e/i)) > 0) {\n    // Work out the exponent.\n    if (integerLen < 0) integerLen = i;\n    integerLen += +numStr.slice(i + 1);\n    numStr = numStr.substring(0, i);\n  } else if (integerLen < 0) {\n    // There was no decimal point or exponent so it is an integer.\n    integerLen = numStr.length;\n  }\n\n  // Count the number of leading zeros.\n  for (i = 0; numStr.charAt(i) === ZERO_CHAR; i++) { /* empty */\n  }\n\n  if (i === (zeros = numStr.length)) {\n    // The digits are all zero.\n    digits = [0];\n    integerLen = 1;\n  } else {\n    // Count the number of trailing zeros\n    zeros--;\n    while (numStr.charAt(zeros) === ZERO_CHAR) zeros--;\n\n    // Trailing zeros are insignificant so ignore them\n    integerLen -= i;\n    digits = [];\n    // Convert string to array of digits without leading/trailing zeros.\n    for (j = 0; i <= zeros; i++, j++) {\n      digits[j] = Number(numStr.charAt(i));\n    }\n  }\n\n  // If the number overflows the maximum allowed digits then use an exponent.\n  if (integerLen > MAX_DIGITS) {\n    digits = digits.splice(0, MAX_DIGITS - 1);\n    exponent = integerLen - 1;\n    integerLen = 1;\n  }\n\n  return {digits, exponent, integerLen};\n}\n\n/**\n * Round the parsed number to the specified number of decimal places\n * This function changes the parsedNumber in-place\n */\nfunction roundNumber(parsedNumber: ParsedNumber, minFrac: number, maxFrac: number) {\n  if (minFrac > maxFrac) {\n    throw new Error(`The minimum number of digits after fraction (${\n        minFrac}) is higher than the maximum (${maxFrac}).`);\n  }\n\n  let digits = parsedNumber.digits;\n  let fractionLen = digits.length - parsedNumber.integerLen;\n  const fractionSize = Math.min(Math.max(minFrac, fractionLen), maxFrac);\n\n  // The index of the digit to where rounding is to occur\n  let roundAt = fractionSize + parsedNumber.integerLen;\n  let digit = digits[roundAt];\n\n  if (roundAt > 0) {\n    // Drop fractional digits beyond `roundAt`\n    digits.splice(Math.max(parsedNumber.integerLen, roundAt));\n\n    // Set non-fractional digits beyond `roundAt` to 0\n    for (let j = roundAt; j < digits.length; j++) {\n      digits[j] = 0;\n    }\n  } else {\n    // We rounded to zero so reset the parsedNumber\n    fractionLen = Math.max(0, fractionLen);\n    parsedNumber.integerLen = 1;\n    digits.length = Math.max(1, roundAt = fractionSize + 1);\n    digits[0] = 0;\n    for (let i = 1; i < roundAt; i++) digits[i] = 0;\n  }\n\n  if (digit >= 5) {\n    if (roundAt - 1 < 0) {\n      for (let k = 0; k > roundAt; k--) {\n        digits.unshift(0);\n        parsedNumber.integerLen++;\n      }\n      digits.unshift(1);\n      parsedNumber.integerLen++;\n    } else {\n      digits[roundAt - 1]++;\n    }\n  }\n\n  // Pad out with zeros to get the required fraction length\n  for (; fractionLen < Math.max(0, fractionSize); fractionLen++) digits.push(0);\n\n  let dropTrailingZeros = fractionSize !== 0;\n  // Minimal length = nb of decimals required + current nb of integers\n  // Any number besides that is optional and can be removed if it's a trailing 0\n  const minLen = minFrac + parsedNumber.integerLen;\n  // Do any carrying, e.g. a digit was rounded up to 10\n  const carry = digits.reduceRight(function(carry, d, i, digits) {\n    d = d + carry;\n    digits[i] = d < 10 ? d : d - 10;  // d % 10\n    if (dropTrailingZeros) {\n      // Do not keep meaningless fractional trailing zeros (e.g. 15.52000 --> 15.52)\n      if (digits[i] === 0 && i >= minLen) {\n        digits.pop();\n      } else {\n        dropTrailingZeros = false;\n      }\n    }\n    return d >= 10 ? 1 : 0;  // Math.floor(d / 10);\n  }, 0);\n  if (carry) {\n    digits.unshift(carry);\n    parsedNumber.integerLen++;\n  }\n}\n\nexport function parseIntAutoRadix(text: string): number {\n  const result: number = parseInt(text);\n  if (isNaN(result)) {\n    throw new Error('Invalid integer literal when parsing ' + text);\n  }\n  return result;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Inject, Injectable, LOCALE_ID} from '@angular/core';\n\nimport {getLocalePluralCase, Plural} from './locale_data_api';\n\n\n/**\n * @publicApi\n */\nexport abstract class NgLocalization {\n  abstract getPluralCategory(value: any, locale?: string): string;\n}\n\n\n/**\n * Returns the plural category for a given value.\n * - \"=value\" when the case exists,\n * - the plural category otherwise\n */\nexport function getPluralCategory(\n    value: number, cases: string[], ngLocalization: NgLocalization, locale?: string): string {\n  let key = `=${value}`;\n\n  if (cases.indexOf(key) > -1) {\n    return key;\n  }\n\n  key = ngLocalization.getPluralCategory(value, locale);\n\n  if (cases.indexOf(key) > -1) {\n    return key;\n  }\n\n  if (cases.indexOf('other') > -1) {\n    return 'other';\n  }\n\n  throw new Error(`No plural message found for value \"${value}\"`);\n}\n\n/**\n * Returns the plural case based on the locale\n *\n * @publicApi\n */\n@Injectable()\nexport class NgLocaleLocalization extends NgLocalization {\n  constructor(@Inject(LOCALE_ID) protected locale: string) {\n    super();\n  }\n\n  getPluralCategory(value: any, locale?: string): string {\n    const plural = getLocalePluralCase(locale || this.locale)(value);\n\n    switch (plural) {\n      case Plural.Zero:\n        return 'zero';\n      case Plural.One:\n        return 'one';\n      case Plural.Two:\n        return 'two';\n      case Plural.Few:\n        return 'few';\n      case Plural.Many:\n        return 'many';\n      default:\n        return 'other';\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ɵregisterLocaleData} from '@angular/core';\n\n/**\n * Register global data to be used internally by Angular. See the\n * [\"I18n guide\"](guide/i18n#i18n-pipes) to know how to import additional locale data.\n *\n * The signature registerLocaleData(data: any, extraData?: any) is deprecated since v5.1\n *\n * @publicApi\n */\nexport function registerLocaleData(data: any, localeId?: string|any, extraData?: any): void {\n  return ɵregisterLocaleData(data, localeId, extraData);\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport function parseCookieValue(cookieStr: string, name: string): string|null {\n  name = encodeURIComponent(name);\n  for (const cookie of cookieStr.split(';')) {\n    const eqIndex = cookie.indexOf('=');\n    const [cookieName, cookieValue]: string[] =\n        eqIndex == -1 ? [cookie, ''] : [cookie.slice(0, eqIndex), cookie.slice(eqIndex + 1)];\n    if (cookieName.trim() === name) {\n      return decodeURIComponent(cookieValue);\n    }\n  }\n  return null;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {Directive, DoCheck, ElementRef, Input, IterableChanges, IterableDiffer, IterableDiffers, KeyValueChanges, KeyValueDiffer, KeyValueDiffers, Renderer2, ɵisListLikeIterable as isListLikeIterable, ɵstringify as stringify} from '@angular/core';\n\ntype NgClassSupportedTypes = string[]|Set<string>|{[klass: string]: any}|null|undefined;\n\n/**\n * @ngModule CommonModule\n *\n * @usageNotes\n * ```\n *     <some-element [ngClass]=\"'first second'\">...</some-element>\n *\n *     <some-element [ngClass]=\"['first', 'second']\">...</some-element>\n *\n *     <some-element [ngClass]=\"{'first': true, 'second': true, 'third': false}\">...</some-element>\n *\n *     <some-element [ngClass]=\"stringExp|arrayExp|objExp\">...</some-element>\n *\n *     <some-element [ngClass]=\"{'class1 class2 class3' : true}\">...</some-element>\n * ```\n *\n * @description\n *\n * Adds and removes CSS classes on an HTML element.\n *\n * The CSS classes are updated as follows, depending on the type of the expression evaluation:\n * - `string` - the CSS classes listed in the string (space delimited) are added,\n * - `Array` - the CSS classes declared as Array elements are added,\n * - `Object` - keys are CSS classes that get added when the expression given in the value\n *              evaluates to a truthy value, otherwise they are removed.\n *\n * @publicApi\n */\n@Directive({selector: '[ngClass]'})\nexport class NgClass implements DoCheck {\n  private _iterableDiffer: IterableDiffer<string>|null = null;\n  private _keyValueDiffer: KeyValueDiffer<string, any>|null = null;\n  private _initialClasses: string[] = [];\n  private _rawClass: NgClassSupportedTypes = null;\n\n  constructor(\n      private _iterableDiffers: IterableDiffers, private _keyValueDiffers: KeyValueDiffers,\n      private _ngEl: ElementRef, private _renderer: Renderer2) {}\n\n\n  @Input('class')\n  set klass(value: string) {\n    this._removeClasses(this._initialClasses);\n    this._initialClasses = typeof value === 'string' ? value.split(/\\s+/) : [];\n    this._applyClasses(this._initialClasses);\n    this._applyClasses(this._rawClass);\n  }\n\n  @Input('ngClass')\n  set ngClass(value: string|string[]|Set<string>|{[klass: string]: any}) {\n    this._removeClasses(this._rawClass);\n    this._applyClasses(this._initialClasses);\n\n    this._iterableDiffer = null;\n    this._keyValueDiffer = null;\n\n    this._rawClass = typeof value === 'string' ? value.split(/\\s+/) : value;\n\n    if (this._rawClass) {\n      if (isListLikeIterable(this._rawClass)) {\n        this._iterableDiffer = this._iterableDiffers.find(this._rawClass).create();\n      } else {\n        this._keyValueDiffer = this._keyValueDiffers.find(this._rawClass).create();\n      }\n    }\n  }\n\n  ngDoCheck() {\n    if (this._iterableDiffer) {\n      const iterableChanges = this._iterableDiffer.diff(this._rawClass as string[]);\n      if (iterableChanges) {\n        this._applyIterableChanges(iterableChanges);\n      }\n    } else if (this._keyValueDiffer) {\n      const keyValueChanges = this._keyValueDiffer.diff(this._rawClass as {[k: string]: any});\n      if (keyValueChanges) {\n        this._applyKeyValueChanges(keyValueChanges);\n      }\n    }\n  }\n\n  private _applyKeyValueChanges(changes: KeyValueChanges<string, any>): void {\n    changes.forEachAddedItem((record) => this._toggleClass(record.key, record.currentValue));\n    changes.forEachChangedItem((record) => this._toggleClass(record.key, record.currentValue));\n    changes.forEachRemovedItem((record) => {\n      if (record.previousValue) {\n        this._toggleClass(record.key, false);\n      }\n    });\n  }\n\n  private _applyIterableChanges(changes: IterableChanges<string>): void {\n    changes.forEachAddedItem((record) => {\n      if (typeof record.item === 'string') {\n        this._toggleClass(record.item, true);\n      } else {\n        throw new Error(`NgClass can only toggle CSS classes expressed as strings, got ${\n            stringify(record.item)}`);\n      }\n    });\n\n    changes.forEachRemovedItem((record) => this._toggleClass(record.item, false));\n  }\n\n  /**\n   * Applies a collection of CSS classes to the DOM element.\n   *\n   * For argument of type Set and Array CSS class names contained in those collections are always\n   * added.\n   * For argument of type Map CSS class name in the map's key is toggled based on the value (added\n   * for truthy and removed for falsy).\n   */\n  private _applyClasses(rawClassVal: NgClassSupportedTypes) {\n    if (rawClassVal) {\n      if (Array.isArray(rawClassVal) || rawClassVal instanceof Set) {\n        (<any>rawClassVal).forEach((klass: string) => this._toggleClass(klass, true));\n      } else {\n        Object.keys(rawClassVal).forEach(klass => this._toggleClass(klass, !!rawClassVal[klass]));\n      }\n    }\n  }\n\n  /**\n   * Removes a collection of CSS classes from the DOM element. This is mostly useful for cleanup\n   * purposes.\n   */\n  private _removeClasses(rawClassVal: NgClassSupportedTypes) {\n    if (rawClassVal) {\n      if (Array.isArray(rawClassVal) || rawClassVal instanceof Set) {\n        (<any>rawClassVal).forEach((klass: string) => this._toggleClass(klass, false));\n      } else {\n        Object.keys(rawClassVal).forEach(klass => this._toggleClass(klass, false));\n      }\n    }\n  }\n\n  private _toggleClass(klass: string, enabled: boolean): void {\n    klass = klass.trim();\n    if (klass) {\n      klass.split(/\\s+/g).forEach(klass => {\n        if (enabled) {\n          this._renderer.addClass(this._ngEl.nativeElement, klass);\n        } else {\n          this._renderer.removeClass(this._ngEl.nativeElement, klass);\n        }\n      });\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ComponentFactoryResolver, ComponentRef, Directive, Injector, Input, NgModuleFactory, NgModuleRef, OnChanges, OnDestroy, SimpleChanges, StaticProvider, Type, ViewContainerRef} from '@angular/core';\n\n\n/**\n * Instantiates a single {@link Component} type and inserts its Host View into current View.\n * `NgComponentOutlet` provides a declarative approach for dynamic component creation.\n *\n * `NgComponentOutlet` requires a component type, if a falsy value is set the view will clear and\n * any existing component will get destroyed.\n *\n * @usageNotes\n *\n * ### Fine tune control\n *\n * You can control the component creation process by using the following optional attributes:\n *\n * * `ngComponentOutletInjector`: Optional custom {@link Injector} that will be used as parent for\n * the Component. Defaults to the injector of the current view container.\n *\n * * `ngComponentOutletContent`: Optional list of projectable nodes to insert into the content\n * section of the component, if exists.\n *\n * * `ngComponentOutletNgModuleFactory`: Optional module factory to allow dynamically loading other\n * module, then load a component from that module.\n *\n * ### Syntax\n *\n * Simple\n * ```\n * <ng-container *ngComponentOutlet=\"componentTypeExpression\"></ng-container>\n * ```\n *\n * Customized injector/content\n * ```\n * <ng-container *ngComponentOutlet=\"componentTypeExpression;\n *                                   injector: injectorExpression;\n *                                   content: contentNodesExpression;\">\n * </ng-container>\n * ```\n *\n * Customized ngModuleFactory\n * ```\n * <ng-container *ngComponentOutlet=\"componentTypeExpression;\n *                                   ngModuleFactory: moduleFactory;\">\n * </ng-container>\n * ```\n *\n * ### A simple example\n *\n * {@example common/ngComponentOutlet/ts/module.ts region='SimpleExample'}\n *\n * A more complete example with additional options:\n *\n * {@example common/ngComponentOutlet/ts/module.ts region='CompleteExample'}\n *\n * @publicApi\n * @ngModule CommonModule\n */\n@Directive({selector: '[ngComponentOutlet]'})\nexport class NgComponentOutlet implements OnChanges, OnDestroy {\n  // TODO(issue/24571): remove '!'.\n  @Input() ngComponentOutlet!: Type<any>;\n  // TODO(issue/24571): remove '!'.\n  @Input() ngComponentOutletInjector!: Injector;\n  // TODO(issue/24571): remove '!'.\n  @Input() ngComponentOutletContent!: any[][];\n  // TODO(issue/24571): remove '!'.\n  @Input() ngComponentOutletNgModuleFactory!: NgModuleFactory<any>;\n\n  private _componentRef: ComponentRef<any>|null = null;\n  private _moduleRef: NgModuleRef<any>|null = null;\n\n  constructor(private _viewContainerRef: ViewContainerRef) {}\n\n  ngOnChanges(changes: SimpleChanges) {\n    this._viewContainerRef.clear();\n    this._componentRef = null;\n\n    if (this.ngComponentOutlet) {\n      const elInjector = this.ngComponentOutletInjector || this._viewContainerRef.parentInjector;\n\n      if (changes['ngComponentOutletNgModuleFactory']) {\n        if (this._moduleRef) this._moduleRef.destroy();\n\n        if (this.ngComponentOutletNgModuleFactory) {\n          const parentModule = elInjector.get(NgModuleRef);\n          this._moduleRef = this.ngComponentOutletNgModuleFactory.create(parentModule.injector);\n        } else {\n          this._moduleRef = null;\n        }\n      }\n\n      const componentFactoryResolver = this._moduleRef ? this._moduleRef.componentFactoryResolver :\n                                                         elInjector.get(ComponentFactoryResolver);\n\n      const componentFactory =\n          componentFactoryResolver.resolveComponentFactory(this.ngComponentOutlet);\n\n      this._componentRef = this._viewContainerRef.createComponent(\n          componentFactory, this._viewContainerRef.length, elInjector,\n          this.ngComponentOutletContent);\n    }\n  }\n\n  ngOnDestroy() {\n    if (this._moduleRef) this._moduleRef.destroy();\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, DoCheck, EmbeddedViewRef, Input, isDevMode, IterableChangeRecord, IterableChanges, IterableDiffer, IterableDiffers, NgIterable, TemplateRef, TrackByFunction, ViewContainerRef} from '@angular/core';\n\n/**\n * @publicApi\n */\nexport class NgForOfContext<T, U extends NgIterable<T> = NgIterable<T>> {\n  constructor(public $implicit: T, public ngForOf: U, public index: number, public count: number) {}\n\n  get first(): boolean {\n    return this.index === 0;\n  }\n\n  get last(): boolean {\n    return this.index === this.count - 1;\n  }\n\n  get even(): boolean {\n    return this.index % 2 === 0;\n  }\n\n  get odd(): boolean {\n    return !this.even;\n  }\n}\n\n/**\n * A [structural directive](guide/structural-directives) that renders\n * a template for each item in a collection.\n * The directive is placed on an element, which becomes the parent\n * of the cloned templates.\n *\n * The `ngForOf` directive is generally used in the\n * [shorthand form](guide/structural-directives#the-asterisk--prefix) `*ngFor`.\n * In this form, the template to be rendered for each iteration is the content\n * of an anchor element containing the directive.\n *\n * The following example shows the shorthand syntax with some options,\n * contained in an `<li>` element.\n *\n * ```\n * <li *ngFor=\"let item of items; index as i; trackBy: trackByFn\">...</li>\n * ```\n *\n * The shorthand form expands into a long form that uses the `ngForOf` selector\n * on an `<ng-template>` element.\n * The content of the `<ng-template>` element is the `<li>` element that held the\n * short-form directive.\n *\n * Here is the expanded version of the short-form example.\n *\n * ```\n * <ng-template ngFor let-item [ngForOf]=\"items\" let-i=\"index\" [ngForTrackBy]=\"trackByFn\">\n *   <li>...</li>\n * </ng-template>\n * ```\n *\n * Angular automatically expands the shorthand syntax as it compiles the template.\n * The context for each embedded view is logically merged to the current component\n * context according to its lexical position.\n *\n * When using the shorthand syntax, Angular allows only [one structural directive\n * on an element](guide/structural-directives#one-structural-directive-per-host-element).\n * If you want to iterate conditionally, for example,\n * put the `*ngIf` on a container element that wraps the `*ngFor` element.\n * For futher discussion, see\n * [Structural Directives](guide/structural-directives#one-per-element).\n *\n * @usageNotes\n *\n * ### Local variables\n *\n * `NgForOf` provides exported values that can be aliased to local variables.\n * For example:\n *\n *  ```\n * <li *ngFor=\"let user of users; index as i; first as isFirst\">\n *    {{i}}/{{users.length}}. {{user}} <span *ngIf=\"isFirst\">default</span>\n * </li>\n * ```\n *\n * The following exported values can be aliased to local variables:\n *\n * - `$implicit: T`: The value of the individual items in the iterable (`ngForOf`).\n * - `ngForOf: NgIterable<T>`: The value of the iterable expression. Useful when the expression is\n * more complex then a property access, for example when using the async pipe (`userStreams |\n * async`).\n * - `index: number`: The index of the current item in the iterable.\n * - `count: number`: The length of the iterable.\n * - `first: boolean`: True when the item is the first item in the iterable.\n * - `last: boolean`: True when the item is the last item in the iterable.\n * - `even: boolean`: True when the item has an even index in the iterable.\n * - `odd: boolean`: True when the item has an odd index in the iterable.\n *\n * ### Change propagation\n *\n * When the contents of the iterator changes, `NgForOf` makes the corresponding changes to the DOM:\n *\n * * When an item is added, a new instance of the template is added to the DOM.\n * * When an item is removed, its template instance is removed from the DOM.\n * * When items are reordered, their respective templates are reordered in the DOM.\n *\n * Angular uses object identity to track insertions and deletions within the iterator and reproduce\n * those changes in the DOM. This has important implications for animations and any stateful\n * controls that are present, such as `<input>` elements that accept user input. Inserted rows can\n * be animated in, deleted rows can be animated out, and unchanged rows retain any unsaved state\n * such as user input.\n * For more on animations, see [Transitions and Triggers](guide/transition-and-triggers).\n *\n * The identities of elements in the iterator can change while the data does not.\n * This can happen, for example, if the iterator is produced from an RPC to the server, and that\n * RPC is re-run. Even if the data hasn't changed, the second response produces objects with\n * different identities, and Angular must tear down the entire DOM and rebuild it (as if all old\n * elements were deleted and all new elements inserted).\n *\n * To avoid this expensive operation, you can customize the default tracking algorithm.\n * by supplying the `trackBy` option to `NgForOf`.\n * `trackBy` takes a function that has two arguments: `index` and `item`.\n * If `trackBy` is given, Angular tracks changes by the return value of the function.\n *\n * @see [Structural Directives](guide/structural-directives)\n * @ngModule CommonModule\n * @publicApi\n */\n@Directive({selector: '[ngFor][ngForOf]'})\nexport class NgForOf<T, U extends NgIterable<T> = NgIterable<T>> implements DoCheck {\n  /**\n   * The value of the iterable expression, which can be used as a\n   * [template input variable](guide/structural-directives#template-input-variable).\n   */\n  @Input()\n  set ngForOf(ngForOf: U&NgIterable<T>|undefined|null) {\n    this._ngForOf = ngForOf;\n    this._ngForOfDirty = true;\n  }\n  /**\n   * A function that defines how to track changes for items in the iterable.\n   *\n   * When items are added, moved, or removed in the iterable,\n   * the directive must re-render the appropriate DOM nodes.\n   * To minimize churn in the DOM, only nodes that have changed\n   * are re-rendered.\n   *\n   * By default, the change detector assumes that\n   * the object instance identifies the node in the iterable.\n   * When this function is supplied, the directive uses\n   * the result of calling this function to identify the item node,\n   * rather than the identity of the object itself.\n   *\n   * The function receives two inputs,\n   * the iteration index and the associated node data.\n   */\n  @Input()\n  set ngForTrackBy(fn: TrackByFunction<T>) {\n    if (isDevMode() && fn != null && typeof fn !== 'function') {\n      // TODO(vicb): use a log service once there is a public one available\n      if (<any>console && <any>console.warn) {\n        console.warn(\n            `trackBy must be a function, but received ${JSON.stringify(fn)}. ` +\n            `See https://angular.io/api/common/NgForOf#change-propagation for more information.`);\n      }\n    }\n    this._trackByFn = fn;\n  }\n\n  get ngForTrackBy(): TrackByFunction<T> {\n    return this._trackByFn;\n  }\n\n  private _ngForOf: U|undefined|null = null;\n  private _ngForOfDirty: boolean = true;\n  private _differ: IterableDiffer<T>|null = null;\n  // TODO(issue/24571): remove '!'.\n  private _trackByFn!: TrackByFunction<T>;\n\n  constructor(\n      private _viewContainer: ViewContainerRef,\n      private _template: TemplateRef<NgForOfContext<T, U>>, private _differs: IterableDiffers) {}\n\n  /**\n   * A reference to the template that is stamped out for each item in the iterable.\n   * @see [template reference variable](guide/template-reference-variables)\n   */\n  @Input()\n  set ngForTemplate(value: TemplateRef<NgForOfContext<T, U>>) {\n    // TODO(TS2.1): make TemplateRef<Partial<NgForRowOf<T>>> once we move to TS v2.1\n    // The current type is too restrictive; a template that just uses index, for example,\n    // should be acceptable.\n    if (value) {\n      this._template = value;\n    }\n  }\n\n  /**\n   * Applies the changes when needed.\n   */\n  ngDoCheck(): void {\n    if (this._ngForOfDirty) {\n      this._ngForOfDirty = false;\n      // React on ngForOf changes only once all inputs have been initialized\n      const value = this._ngForOf;\n      if (!this._differ && value) {\n        try {\n          this._differ = this._differs.find(value).create(this.ngForTrackBy);\n        } catch {\n          throw new Error(`Cannot find a differ supporting object '${value}' of type '${\n              getTypeName(value)}'. NgFor only supports binding to Iterables such as Arrays.`);\n        }\n      }\n    }\n    if (this._differ) {\n      const changes = this._differ.diff(this._ngForOf);\n      if (changes) this._applyChanges(changes);\n    }\n  }\n\n  private _applyChanges(changes: IterableChanges<T>) {\n    const insertTuples: RecordViewTuple<T, U>[] = [];\n    changes.forEachOperation(\n        (item: IterableChangeRecord<any>, adjustedPreviousIndex: number|null,\n         currentIndex: number|null) => {\n          if (item.previousIndex == null) {\n            // NgForOf is never \"null\" or \"undefined\" here because the differ detected\n            // that a new item needs to be inserted from the iterable. This implies that\n            // there is an iterable value for \"_ngForOf\".\n            const view = this._viewContainer.createEmbeddedView(\n                this._template, new NgForOfContext<T, U>(null!, this._ngForOf!, -1, -1),\n                currentIndex === null ? undefined : currentIndex);\n            const tuple = new RecordViewTuple<T, U>(item, view);\n            insertTuples.push(tuple);\n          } else if (currentIndex == null) {\n            this._viewContainer.remove(\n                adjustedPreviousIndex === null ? undefined : adjustedPreviousIndex);\n          } else if (adjustedPreviousIndex !== null) {\n            const view = this._viewContainer.get(adjustedPreviousIndex)!;\n            this._viewContainer.move(view, currentIndex);\n            const tuple = new RecordViewTuple(item, <EmbeddedViewRef<NgForOfContext<T, U>>>view);\n            insertTuples.push(tuple);\n          }\n        });\n\n    for (let i = 0; i < insertTuples.length; i++) {\n      this._perViewChange(insertTuples[i].view, insertTuples[i].record);\n    }\n\n    for (let i = 0, ilen = this._viewContainer.length; i < ilen; i++) {\n      const viewRef = <EmbeddedViewRef<NgForOfContext<T, U>>>this._viewContainer.get(i);\n      viewRef.context.index = i;\n      viewRef.context.count = ilen;\n      viewRef.context.ngForOf = this._ngForOf!;\n    }\n\n    changes.forEachIdentityChange((record: any) => {\n      const viewRef =\n          <EmbeddedViewRef<NgForOfContext<T, U>>>this._viewContainer.get(record.currentIndex);\n      viewRef.context.$implicit = record.item;\n    });\n  }\n\n  private _perViewChange(\n      view: EmbeddedViewRef<NgForOfContext<T, U>>, record: IterableChangeRecord<any>) {\n    view.context.$implicit = record.item;\n  }\n\n  /**\n   * Asserts the correct type of the context for the template that `NgForOf` will render.\n   *\n   * The presence of this method is a signal to the Ivy template type-check compiler that the\n   * `NgForOf` structural directive renders its template with a specific context type.\n   */\n  static ngTemplateContextGuard<T, U extends NgIterable<T>>(dir: NgForOf<T, U>, ctx: any):\n      ctx is NgForOfContext<T, U> {\n    return true;\n  }\n}\n\nclass RecordViewTuple<T, U extends NgIterable<T>> {\n  constructor(public record: any, public view: EmbeddedViewRef<NgForOfContext<T, U>>) {}\n}\n\nfunction getTypeName(type: any): string {\n  return type['name'] || typeof type;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, EmbeddedViewRef, Input, TemplateRef, ViewContainerRef, ɵstringify as stringify} from '@angular/core';\n\n\n/**\n * A structural directive that conditionally includes a template based on the value of\n * an expression coerced to Boolean.\n * When the expression evaluates to true, Angular renders the template\n * provided in a `then` clause, and when  false or null,\n * Angular renders the template provided in an optional `else` clause. The default\n * template for the `else` clause is blank.\n *\n * A [shorthand form](guide/structural-directives#the-asterisk--prefix) of the directive,\n * `*ngIf=\"condition\"`, is generally used, provided\n * as an attribute of the anchor element for the inserted template.\n * Angular expands this into a more explicit version, in which the anchor element\n * is contained in an `<ng-template>` element.\n *\n * Simple form with shorthand syntax:\n *\n * ```\n * <div *ngIf=\"condition\">Content to render when condition is true.</div>\n * ```\n *\n * Simple form with expanded syntax:\n *\n * ```\n * <ng-template [ngIf]=\"condition\"><div>Content to render when condition is\n * true.</div></ng-template>\n * ```\n *\n * Form with an \"else\" block:\n *\n * ```\n * <div *ngIf=\"condition; else elseBlock\">Content to render when condition is true.</div>\n * <ng-template #elseBlock>Content to render when condition is false.</ng-template>\n * ```\n *\n * Shorthand form with \"then\" and \"else\" blocks:\n *\n * ```\n * <div *ngIf=\"condition; then thenBlock else elseBlock\"></div>\n * <ng-template #thenBlock>Content to render when condition is true.</ng-template>\n * <ng-template #elseBlock>Content to render when condition is false.</ng-template>\n * ```\n *\n * Form with storing the value locally:\n *\n * ```\n * <div *ngIf=\"condition as value; else elseBlock\">{{value}}</div>\n * <ng-template #elseBlock>Content to render when value is null.</ng-template>\n * ```\n *\n * @usageNotes\n *\n * The `*ngIf` directive is most commonly used to conditionally show an inline template,\n * as seen in the following  example.\n * The default `else` template is blank.\n *\n * {@example common/ngIf/ts/module.ts region='NgIfSimple'}\n *\n * ### Showing an alternative template using `else`\n *\n * To display a template when `expression` evaluates to false, use an `else` template\n * binding as shown in the following example.\n * The `else` binding points to an `<ng-template>`  element labeled `#elseBlock`.\n * The template can be defined anywhere in the component view, but is typically placed right after\n * `ngIf` for readability.\n *\n * {@example common/ngIf/ts/module.ts region='NgIfElse'}\n *\n * ### Using an external `then` template\n *\n * In the previous example, the then-clause template is specified inline, as the content of the\n * tag that contains the `ngIf` directive. You can also specify a template that is defined\n * externally, by referencing a labeled `<ng-template>` element. When you do this, you can\n * change which template to use at runtime, as shown in the following example.\n *\n * {@example common/ngIf/ts/module.ts region='NgIfThenElse'}\n *\n * ### Storing a conditional result in a variable\n *\n * You might want to show a set of properties from the same object. If you are waiting\n * for asynchronous data, the object can be undefined.\n * In this case, you can use `ngIf` and store the result of the condition in a local\n * variable as shown in the the following example.\n *\n * {@example common/ngIf/ts/module.ts region='NgIfAs'}\n *\n * This code uses only one `AsyncPipe`, so only one subscription is created.\n * The conditional statement stores the result of `userStream|async` in the local variable `user`.\n * You can then bind the local `user` repeatedly.\n *\n * The conditional displays the data only if `userStream` returns a value,\n * so you don't need to use the\n * [safe-navigation-operator](guide/template-expression-operators#safe-navigation-operator) (`?.`)\n * to guard against null values when accessing properties.\n * You can display an alternative template while waiting for the data.\n *\n * ### Shorthand syntax\n *\n * The shorthand syntax `*ngIf` expands into two separate template specifications\n * for the \"then\" and \"else\" clauses. For example, consider the following shorthand statement,\n * that is meant to show a loading page while waiting for data to be loaded.\n *\n * ```\n * <div class=\"hero-list\" *ngIf=\"heroes else loading\">\n *  ...\n * </div>\n *\n * <ng-template #loading>\n *  <div>Loading...</div>\n * </ng-template>\n * ```\n *\n * You can see that the \"else\" clause references the `<ng-template>`\n * with the `#loading` label, and the template for the \"then\" clause\n * is provided as the content of the anchor element.\n *\n * However, when Angular expands the shorthand syntax, it creates\n * another `<ng-template>` tag, with `ngIf` and `ngIfElse` directives.\n * The anchor element containing the template for the \"then\" clause becomes\n * the content of this unlabeled `<ng-template>` tag.\n *\n * ```\n * <ng-template [ngIf]=\"heroes\" [ngIfElse]=\"loading\">\n *  <div class=\"hero-list\">\n *   ...\n *  </div>\n * </ng-template>\n *\n * <ng-template #loading>\n *  <div>Loading...</div>\n * </ng-template>\n * ```\n *\n * The presence of the implicit template object has implications for the nesting of\n * structural directives. For more on this subject, see\n * [Structural Directives](https://angular.io/guide/structural-directives#one-per-element).\n *\n * @ngModule CommonModule\n * @publicApi\n */\n@Directive({selector: '[ngIf]'})\nexport class NgIf<T = unknown> {\n  private _context: NgIfContext<T> = new NgIfContext<T>();\n  private _thenTemplateRef: TemplateRef<NgIfContext<T>>|null = null;\n  private _elseTemplateRef: TemplateRef<NgIfContext<T>>|null = null;\n  private _thenViewRef: EmbeddedViewRef<NgIfContext<T>>|null = null;\n  private _elseViewRef: EmbeddedViewRef<NgIfContext<T>>|null = null;\n\n  constructor(private _viewContainer: ViewContainerRef, templateRef: TemplateRef<NgIfContext<T>>) {\n    this._thenTemplateRef = templateRef;\n  }\n\n  /**\n   * The Boolean expression to evaluate as the condition for showing a template.\n   */\n  @Input()\n  set ngIf(condition: T) {\n    this._context.$implicit = this._context.ngIf = condition;\n    this._updateView();\n  }\n\n  /**\n   * A template to show if the condition expression evaluates to true.\n   */\n  @Input()\n  set ngIfThen(templateRef: TemplateRef<NgIfContext<T>>|null) {\n    assertTemplate('ngIfThen', templateRef);\n    this._thenTemplateRef = templateRef;\n    this._thenViewRef = null;  // clear previous view if any.\n    this._updateView();\n  }\n\n  /**\n   * A template to show if the condition expression evaluates to false.\n   */\n  @Input()\n  set ngIfElse(templateRef: TemplateRef<NgIfContext<T>>|null) {\n    assertTemplate('ngIfElse', templateRef);\n    this._elseTemplateRef = templateRef;\n    this._elseViewRef = null;  // clear previous view if any.\n    this._updateView();\n  }\n\n  private _updateView() {\n    if (this._context.$implicit) {\n      if (!this._thenViewRef) {\n        this._viewContainer.clear();\n        this._elseViewRef = null;\n        if (this._thenTemplateRef) {\n          this._thenViewRef =\n              this._viewContainer.createEmbeddedView(this._thenTemplateRef, this._context);\n        }\n      }\n    } else {\n      if (!this._elseViewRef) {\n        this._viewContainer.clear();\n        this._thenViewRef = null;\n        if (this._elseTemplateRef) {\n          this._elseViewRef =\n              this._viewContainer.createEmbeddedView(this._elseTemplateRef, this._context);\n        }\n      }\n    }\n  }\n\n  /** @internal */\n  public static ngIfUseIfTypeGuard: void;\n\n  /**\n   * Assert the correct type of the expression bound to the `ngIf` input within the template.\n   *\n   * The presence of this static field is a signal to the Ivy template type check compiler that\n   * when the `NgIf` structural directive renders its template, the type of the expression bound\n   * to `ngIf` should be narrowed in some way. For `NgIf`, the binding expression itself is used to\n   * narrow its type, which allows the strictNullChecks feature of TypeScript to work with `NgIf`.\n   */\n  static ngTemplateGuard_ngIf: 'binding';\n\n  /**\n   * Asserts the correct type of the context for the template that `NgIf` will render.\n   *\n   * The presence of this method is a signal to the Ivy template type-check compiler that the\n   * `NgIf` structural directive renders its template with a specific context type.\n   */\n  static ngTemplateContextGuard<T>(dir: NgIf<T>, ctx: any):\n      ctx is NgIfContext<Exclude<T, false|0|''|null|undefined>> {\n    return true;\n  }\n}\n\n/**\n * @publicApi\n */\nexport class NgIfContext<T = unknown> {\n  public $implicit: T = null!;\n  public ngIf: T = null!;\n}\n\nfunction assertTemplate(property: string, templateRef: TemplateRef<any>|null): void {\n  const isTemplateRefOrNull = !!(!templateRef || templateRef.createEmbeddedView);\n  if (!isTemplateRefOrNull) {\n    throw new Error(`${property} must be a TemplateRef, but received '${stringify(templateRef)}'.`);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, DoCheck, Host, Input, TemplateRef, ViewContainerRef} from '@angular/core';\n\nexport class SwitchView {\n  private _created = false;\n\n  constructor(\n      private _viewContainerRef: ViewContainerRef, private _templateRef: TemplateRef<Object>) {}\n\n  create(): void {\n    this._created = true;\n    this._viewContainerRef.createEmbeddedView(this._templateRef);\n  }\n\n  destroy(): void {\n    this._created = false;\n    this._viewContainerRef.clear();\n  }\n\n  enforceState(created: boolean) {\n    if (created && !this._created) {\n      this.create();\n    } else if (!created && this._created) {\n      this.destroy();\n    }\n  }\n}\n\n/**\n * @ngModule CommonModule\n *\n * @description\n * The `[ngSwitch]` directive on a container specifies an expression to match against.\n * The expressions to match are provided by `ngSwitchCase` directives on views within the container.\n * - Every view that matches is rendered.\n * - If there are no matches, a view with the `ngSwitchDefault` directive is rendered.\n * - Elements within the `[NgSwitch]` statement but outside of any `NgSwitchCase`\n * or `ngSwitchDefault` directive are preserved at the location.\n *\n * @usageNotes\n * Define a container element for the directive, and specify the switch expression\n * to match against as an attribute:\n *\n * ```\n * <container-element [ngSwitch]=\"switch_expression\">\n * ```\n *\n * Within the container, `*ngSwitchCase` statements specify the match expressions\n * as attributes. Include `*ngSwitchDefault` as the final case.\n *\n * ```\n * <container-element [ngSwitch]=\"switch_expression\">\n *    <some-element *ngSwitchCase=\"match_expression_1\">...</some-element>\n * ...\n *    <some-element *ngSwitchDefault>...</some-element>\n * </container-element>\n * ```\n *\n * ### Usage Examples\n *\n * The following example shows how to use more than one case to display the same view:\n *\n * ```\n * <container-element [ngSwitch]=\"switch_expression\">\n *   <!-- the same view can be shown in more than one case -->\n *   <some-element *ngSwitchCase=\"match_expression_1\">...</some-element>\n *   <some-element *ngSwitchCase=\"match_expression_2\">...</some-element>\n *   <some-other-element *ngSwitchCase=\"match_expression_3\">...</some-other-element>\n *   <!--default case when there are no matches -->\n *   <some-element *ngSwitchDefault>...</some-element>\n * </container-element>\n * ```\n *\n * The following example shows how cases can be nested:\n * ```\n * <container-element [ngSwitch]=\"switch_expression\">\n *       <some-element *ngSwitchCase=\"match_expression_1\">...</some-element>\n *       <some-element *ngSwitchCase=\"match_expression_2\">...</some-element>\n *       <some-other-element *ngSwitchCase=\"match_expression_3\">...</some-other-element>\n *       <ng-container *ngSwitchCase=\"match_expression_3\">\n *         <!-- use a ng-container to group multiple root nodes -->\n *         <inner-element></inner-element>\n *         <inner-other-element></inner-other-element>\n *       </ng-container>\n *       <some-element *ngSwitchDefault>...</some-element>\n *     </container-element>\n * ```\n *\n * @publicApi\n * @see `NgSwitchCase`\n * @see `NgSwitchDefault`\n * @see [Structural Directives](guide/structural-directives)\n *\n */\n@Directive({selector: '[ngSwitch]'})\nexport class NgSwitch {\n  // TODO(issue/24571): remove '!'.\n  private _defaultViews!: SwitchView[];\n  private _defaultUsed = false;\n  private _caseCount = 0;\n  private _lastCaseCheckIndex = 0;\n  private _lastCasesMatched = false;\n  private _ngSwitch: any;\n\n  @Input()\n  set ngSwitch(newValue: any) {\n    this._ngSwitch = newValue;\n    if (this._caseCount === 0) {\n      this._updateDefaultCases(true);\n    }\n  }\n\n  /** @internal */\n  _addCase(): number {\n    return this._caseCount++;\n  }\n\n  /** @internal */\n  _addDefault(view: SwitchView) {\n    if (!this._defaultViews) {\n      this._defaultViews = [];\n    }\n    this._defaultViews.push(view);\n  }\n\n  /** @internal */\n  _matchCase(value: any): boolean {\n    const matched = value == this._ngSwitch;\n    this._lastCasesMatched = this._lastCasesMatched || matched;\n    this._lastCaseCheckIndex++;\n    if (this._lastCaseCheckIndex === this._caseCount) {\n      this._updateDefaultCases(!this._lastCasesMatched);\n      this._lastCaseCheckIndex = 0;\n      this._lastCasesMatched = false;\n    }\n    return matched;\n  }\n\n  private _updateDefaultCases(useDefault: boolean) {\n    if (this._defaultViews && useDefault !== this._defaultUsed) {\n      this._defaultUsed = useDefault;\n      for (let i = 0; i < this._defaultViews.length; i++) {\n        const defaultView = this._defaultViews[i];\n        defaultView.enforceState(useDefault);\n      }\n    }\n  }\n}\n\n/**\n * @ngModule CommonModule\n *\n * @description\n * Provides a switch case expression to match against an enclosing `ngSwitch` expression.\n * When the expressions match, the given `NgSwitchCase` template is rendered.\n * If multiple match expressions match the switch expression value, all of them are displayed.\n *\n * @usageNotes\n *\n * Within a switch container, `*ngSwitchCase` statements specify the match expressions\n * as attributes. Include `*ngSwitchDefault` as the final case.\n *\n * ```\n * <container-element [ngSwitch]=\"switch_expression\">\n *   <some-element *ngSwitchCase=\"match_expression_1\">...</some-element>\n *   ...\n *   <some-element *ngSwitchDefault>...</some-element>\n * </container-element>\n * ```\n *\n * Each switch-case statement contains an in-line HTML template or template reference\n * that defines the subtree to be selected if the value of the match expression\n * matches the value of the switch expression.\n *\n * Unlike JavaScript, which uses strict equality, Angular uses loose equality.\n * This means that the empty string, `\"\"` matches 0.\n *\n * @publicApi\n * @see `NgSwitch`\n * @see `NgSwitchDefault`\n *\n */\n@Directive({selector: '[ngSwitchCase]'})\nexport class NgSwitchCase implements DoCheck {\n  private _view: SwitchView;\n  /**\n   * Stores the HTML template to be selected on match.\n   */\n  @Input() ngSwitchCase: any;\n\n  constructor(\n      viewContainer: ViewContainerRef, templateRef: TemplateRef<Object>,\n      @Host() private ngSwitch: NgSwitch) {\n    ngSwitch._addCase();\n    this._view = new SwitchView(viewContainer, templateRef);\n  }\n\n  /**\n   * Performs case matching. For internal use only.\n   */\n  ngDoCheck() {\n    this._view.enforceState(this.ngSwitch._matchCase(this.ngSwitchCase));\n  }\n}\n\n/**\n * @ngModule CommonModule\n *\n * @description\n *\n * Creates a view that is rendered when no `NgSwitchCase` expressions\n * match the `NgSwitch` expression.\n * This statement should be the final case in an `NgSwitch`.\n *\n * @publicApi\n * @see `NgSwitch`\n * @see `NgSwitchCase`\n *\n */\n@Directive({selector: '[ngSwitchDefault]'})\nexport class NgSwitchDefault {\n  constructor(\n      viewContainer: ViewContainerRef, templateRef: TemplateRef<Object>,\n      @Host() ngSwitch: NgSwitch) {\n    ngSwitch._addDefault(new SwitchView(viewContainer, templateRef));\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Attribute, Directive, Host, Input, TemplateRef, ViewContainerRef} from '@angular/core';\n\nimport {getPluralCategory, NgLocalization} from '../i18n/localization';\n\nimport {SwitchView} from './ng_switch';\n\n\n/**\n * @ngModule CommonModule\n *\n * @usageNotes\n * ```\n * <some-element [ngPlural]=\"value\">\n *   <ng-template ngPluralCase=\"=0\">there is nothing</ng-template>\n *   <ng-template ngPluralCase=\"=1\">there is one</ng-template>\n *   <ng-template ngPluralCase=\"few\">there are a few</ng-template>\n * </some-element>\n * ```\n *\n * @description\n *\n * Adds / removes DOM sub-trees based on a numeric value. Tailored for pluralization.\n *\n * Displays DOM sub-trees that match the switch expression value, or failing that, DOM sub-trees\n * that match the switch expression's pluralization category.\n *\n * To use this directive you must provide a container element that sets the `[ngPlural]` attribute\n * to a switch expression. Inner elements with a `[ngPluralCase]` will display based on their\n * expression:\n * - if `[ngPluralCase]` is set to a value starting with `=`, it will only display if the value\n *   matches the switch expression exactly,\n * - otherwise, the view will be treated as a \"category match\", and will only display if exact\n *   value matches aren't found and the value maps to its category for the defined locale.\n *\n * See http://cldr.unicode.org/index/cldr-spec/plural-rules\n *\n * @publicApi\n */\n@Directive({selector: '[ngPlural]'})\nexport class NgPlural {\n  // TODO(issue/24571): remove '!'.\n  private _switchValue!: number;\n  // TODO(issue/24571): remove '!'.\n  private _activeView!: SwitchView;\n  private _caseViews: {[k: string]: SwitchView} = {};\n\n  constructor(private _localization: NgLocalization) {}\n\n  @Input()\n  set ngPlural(value: number) {\n    this._switchValue = value;\n    this._updateView();\n  }\n\n  addCase(value: string, switchView: SwitchView): void {\n    this._caseViews[value] = switchView;\n  }\n\n  private _updateView(): void {\n    this._clearViews();\n\n    const cases = Object.keys(this._caseViews);\n    const key = getPluralCategory(this._switchValue, cases, this._localization);\n    this._activateView(this._caseViews[key]);\n  }\n\n  private _clearViews() {\n    if (this._activeView) this._activeView.destroy();\n  }\n\n  private _activateView(view: SwitchView) {\n    if (view) {\n      this._activeView = view;\n      this._activeView.create();\n    }\n  }\n}\n\n/**\n * @ngModule CommonModule\n *\n * @description\n *\n * Creates a view that will be added/removed from the parent {@link NgPlural} when the\n * given expression matches the plural expression according to CLDR rules.\n *\n * @usageNotes\n * ```\n * <some-element [ngPlural]=\"value\">\n *   <ng-template ngPluralCase=\"=0\">...</ng-template>\n *   <ng-template ngPluralCase=\"other\">...</ng-template>\n * </some-element>\n *```\n *\n * See {@link NgPlural} for more details and example.\n *\n * @publicApi\n */\n@Directive({selector: '[ngPluralCase]'})\nexport class NgPluralCase {\n  constructor(\n      @Attribute('ngPluralCase') public value: string, template: TemplateRef<Object>,\n      viewContainer: ViewContainerRef, @Host() ngPlural: NgPlural) {\n    const isANumber: boolean = !isNaN(Number(value));\n    ngPlural.addCase(isANumber ? `=${value}` : value, new SwitchView(viewContainer, template));\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {Directive, DoCheck, ElementRef, Input, KeyValueChanges, KeyValueDiffer, KeyValueDiffers, Renderer2} from '@angular/core';\n\n\n/**\n * @ngModule CommonModule\n *\n * @usageNotes\n *\n * Set the font of the containing element to the result of an expression.\n *\n * ```\n * <some-element [ngStyle]=\"{'font-style': styleExp}\">...</some-element>\n * ```\n *\n * Set the width of the containing element to a pixel value returned by an expression.\n *\n * ```\n * <some-element [ngStyle]=\"{'max-width.px': widthExp}\">...</some-element>\n * ```\n *\n * Set a collection of style values using an expression that returns key-value pairs.\n *\n * ```\n * <some-element [ngStyle]=\"objExp\">...</some-element>\n * ```\n *\n * @description\n *\n * An attribute directive that updates styles for the containing HTML element.\n * Sets one or more style properties, specified as colon-separated key-value pairs.\n * The key is a style name, with an optional `.<unit>` suffix\n * (such as 'top.px', 'font-style.em').\n * The value is an expression to be evaluated.\n * The resulting non-null value, expressed in the given unit,\n * is assigned to the given style property.\n * If the result of evaluation is null, the corresponding style is removed.\n *\n * @publicApi\n */\n@Directive({selector: '[ngStyle]'})\nexport class NgStyle implements DoCheck {\n  private _ngStyle: {[key: string]: string}|null = null;\n  private _differ: KeyValueDiffer<string, string|number>|null = null;\n\n  constructor(\n      private _ngEl: ElementRef, private _differs: KeyValueDiffers, private _renderer: Renderer2) {}\n\n  @Input('ngStyle')\n  set ngStyle(values: {[klass: string]: any}|null) {\n    this._ngStyle = values;\n    if (!this._differ && values) {\n      this._differ = this._differs.find(values).create();\n    }\n  }\n\n  ngDoCheck() {\n    if (this._differ) {\n      const changes = this._differ.diff(this._ngStyle!);\n      if (changes) {\n        this._applyChanges(changes);\n      }\n    }\n  }\n\n  private _setStyle(nameAndUnit: string, value: string|number|null|undefined): void {\n    const [name, unit] = nameAndUnit.split('.');\n    value = value != null && unit ? `${value}${unit}` : value;\n\n    if (value != null) {\n      this._renderer.setStyle(this._ngEl.nativeElement, name, value as string);\n    } else {\n      this._renderer.removeStyle(this._ngEl.nativeElement, name);\n    }\n  }\n\n  private _applyChanges(changes: KeyValueChanges<string, string|number>): void {\n    changes.forEachRemovedItem((record) => this._setStyle(record.key, null));\n    changes.forEachAddedItem((record) => this._setStyle(record.key, record.currentValue));\n    changes.forEachChangedItem((record) => this._setStyle(record.key, record.currentValue));\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, EmbeddedViewRef, Input, OnChanges, SimpleChange, SimpleChanges, TemplateRef, ViewContainerRef} from '@angular/core';\n\n/**\n * @ngModule CommonModule\n *\n * @description\n *\n * Inserts an embedded view from a prepared `TemplateRef`.\n *\n * You can attach a context object to the `EmbeddedViewRef` by setting `[ngTemplateOutletContext]`.\n * `[ngTemplateOutletContext]` should be an object, the object's keys will be available for binding\n * by the local template `let` declarations.\n *\n * @usageNotes\n * ```\n * <ng-container *ngTemplateOutlet=\"templateRefExp; context: contextExp\"></ng-container>\n * ```\n *\n * Using the key `$implicit` in the context object will set its value as default.\n *\n * ### Example\n *\n * {@example common/ngTemplateOutlet/ts/module.ts region='NgTemplateOutlet'}\n *\n * @publicApi\n */\n@Directive({selector: '[ngTemplateOutlet]'})\nexport class NgTemplateOutlet implements OnChanges {\n  private _viewRef: EmbeddedViewRef<any>|null = null;\n\n  /**\n   * A context object to attach to the {@link EmbeddedViewRef}. This should be an\n   * object, the object's keys will be available for binding by the local template `let`\n   * declarations.\n   * Using the key `$implicit` in the context object will set its value as default.\n   */\n  @Input() public ngTemplateOutletContext: Object|null = null;\n\n  /**\n   * A string defining the template reference and optionally the context object for the template.\n   */\n  @Input() public ngTemplateOutlet: TemplateRef<any>|null = null;\n\n  constructor(private _viewContainerRef: ViewContainerRef) {}\n\n  ngOnChanges(changes: SimpleChanges) {\n    const recreateView = this._shouldRecreateView(changes);\n\n    if (recreateView) {\n      const viewContainerRef = this._viewContainerRef;\n\n      if (this._viewRef) {\n        viewContainerRef.remove(viewContainerRef.indexOf(this._viewRef));\n      }\n\n      this._viewRef = this.ngTemplateOutlet ?\n          viewContainerRef.createEmbeddedView(this.ngTemplateOutlet, this.ngTemplateOutletContext) :\n          null;\n    } else if (this._viewRef && this.ngTemplateOutletContext) {\n      this._updateExistingContext(this.ngTemplateOutletContext);\n    }\n  }\n\n  /**\n   * We need to re-create existing embedded view if:\n   * - templateRef has changed\n   * - context has changes\n   *\n   * We mark context object as changed when the corresponding object\n   * shape changes (new properties are added or existing properties are removed).\n   * In other words we consider context with the same properties as \"the same\" even\n   * if object reference changes (see https://github.com/angular/angular/issues/13407).\n   */\n  private _shouldRecreateView(changes: SimpleChanges): boolean {\n    const ctxChange = changes['ngTemplateOutletContext'];\n    return !!changes['ngTemplateOutlet'] || (ctxChange && this._hasContextShapeChanged(ctxChange));\n  }\n\n  private _hasContextShapeChanged(ctxChange: SimpleChange): boolean {\n    const prevCtxKeys = Object.keys(ctxChange.previousValue || {});\n    const currCtxKeys = Object.keys(ctxChange.currentValue || {});\n\n    if (prevCtxKeys.length === currCtxKeys.length) {\n      for (let propName of currCtxKeys) {\n        if (prevCtxKeys.indexOf(propName) === -1) {\n          return true;\n        }\n      }\n      return false;\n    }\n    return true;\n  }\n\n  private _updateExistingContext(ctx: Object): void {\n    for (let propName of Object.keys(ctx)) {\n      (<any>this._viewRef!.context)[propName] = (<any>this.ngTemplateOutletContext)[propName];\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Provider} from '@angular/core';\nimport {NgClass} from './ng_class';\nimport {NgComponentOutlet} from './ng_component_outlet';\nimport {NgForOf, NgForOfContext} from './ng_for_of';\nimport {NgIf, NgIfContext} from './ng_if';\nimport {NgPlural, NgPluralCase} from './ng_plural';\nimport {NgStyle} from './ng_style';\nimport {NgSwitch, NgSwitchCase, NgSwitchDefault} from './ng_switch';\nimport {NgTemplateOutlet} from './ng_template_outlet';\n\nexport {\n  NgClass,\n  NgComponentOutlet,\n  NgForOf,\n  NgForOfContext,\n  NgIf,\n  NgIfContext,\n  NgPlural,\n  NgPluralCase,\n  NgStyle,\n  NgSwitch,\n  NgSwitchCase,\n  NgSwitchDefault,\n  NgTemplateOutlet,\n};\n\n\n\n/**\n * A collection of Angular directives that are likely to be used in each and every Angular\n * application.\n */\nexport const COMMON_DIRECTIVES: Provider[] = [\n  NgClass,\n  NgComponentOutlet,\n  NgForOf,\n  NgIf,\n  NgTemplateOutlet,\n  NgStyle,\n  NgSwitch,\n  NgSwitchCase,\n  NgSwitchDefault,\n  NgPlural,\n  NgPluralCase,\n];\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Type, ɵstringify as stringify} from '@angular/core';\n\nexport function invalidPipeArgumentError(type: Type<any>, value: Object) {\n  return Error(`InvalidPipeArgument: '${value}' for pipe '${stringify(type)}'`);\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ChangeDetectorRef, EventEmitter, OnDestroy, Pipe, PipeTransform, ɵisObservable, ɵisPromise} from '@angular/core';\nimport {Observable, SubscriptionLike} from 'rxjs';\nimport {invalidPipeArgumentError} from './invalid_pipe_argument_error';\n\ninterface SubscriptionStrategy {\n  createSubscription(async: Observable<any>|Promise<any>, updateLatestValue: any): SubscriptionLike\n      |Promise<any>;\n  dispose(subscription: SubscriptionLike|Promise<any>): void;\n  onDestroy(subscription: SubscriptionLike|Promise<any>): void;\n}\n\nclass ObservableStrategy implements SubscriptionStrategy {\n  createSubscription(async: Observable<any>, updateLatestValue: any): SubscriptionLike {\n    return async.subscribe({\n      next: updateLatestValue,\n      error: (e: any) => {\n        throw e;\n      }\n    });\n  }\n\n  dispose(subscription: SubscriptionLike): void {\n    subscription.unsubscribe();\n  }\n\n  onDestroy(subscription: SubscriptionLike): void {\n    subscription.unsubscribe();\n  }\n}\n\nclass PromiseStrategy implements SubscriptionStrategy {\n  createSubscription(async: Promise<any>, updateLatestValue: (v: any) => any): Promise<any> {\n    return async.then(updateLatestValue, e => {\n      throw e;\n    });\n  }\n\n  dispose(subscription: Promise<any>): void {}\n\n  onDestroy(subscription: Promise<any>): void {}\n}\n\nconst _promiseStrategy = new PromiseStrategy();\nconst _observableStrategy = new ObservableStrategy();\n\n/**\n * @ngModule CommonModule\n * @description\n *\n * Unwraps a value from an asynchronous primitive.\n *\n * The `async` pipe subscribes to an `Observable` or `Promise` and returns the latest value it has\n * emitted. When a new value is emitted, the `async` pipe marks the component to be checked for\n * changes. When the component gets destroyed, the `async` pipe unsubscribes automatically to avoid\n * potential memory leaks.\n *\n * @usageNotes\n *\n * ### Examples\n *\n * This example binds a `Promise` to the view. Clicking the `Resolve` button resolves the\n * promise.\n *\n * {@example common/pipes/ts/async_pipe.ts region='AsyncPipePromise'}\n *\n * It's also possible to use `async` with Observables. The example below binds the `time` Observable\n * to the view. The Observable continuously updates the view with the current time.\n *\n * {@example common/pipes/ts/async_pipe.ts region='AsyncPipeObservable'}\n *\n * @publicApi\n */\n@Pipe({name: 'async', pure: false})\nexport class AsyncPipe implements OnDestroy, PipeTransform {\n  private _latestValue: any = null;\n\n  private _subscription: SubscriptionLike|Promise<any>|null = null;\n  private _obj: Observable<any>|Promise<any>|EventEmitter<any>|null = null;\n  private _strategy: SubscriptionStrategy = null!;\n\n  constructor(private _ref: ChangeDetectorRef) {}\n\n  ngOnDestroy(): void {\n    if (this._subscription) {\n      this._dispose();\n    }\n  }\n\n  transform<T>(obj: null): null;\n  transform<T>(obj: undefined): undefined;\n  transform<T>(obj: Observable<T>|null|undefined): T|null;\n  transform<T>(obj: Promise<T>|null|undefined): T|null;\n  transform(obj: Observable<any>|Promise<any>|null|undefined): any {\n    if (!this._obj) {\n      if (obj) {\n        this._subscribe(obj);\n      }\n      return this._latestValue;\n    }\n\n    if (obj !== this._obj) {\n      this._dispose();\n      return this.transform(obj as any);\n    }\n\n    return this._latestValue;\n  }\n\n  private _subscribe(obj: Observable<any>|Promise<any>|EventEmitter<any>): void {\n    this._obj = obj;\n    this._strategy = this._selectStrategy(obj);\n    this._subscription = this._strategy.createSubscription(\n        obj, (value: Object) => this._updateLatestValue(obj, value));\n  }\n\n  private _selectStrategy(obj: Observable<any>|Promise<any>|EventEmitter<any>): any {\n    if (ɵisPromise(obj)) {\n      return _promiseStrategy;\n    }\n\n    if (ɵisObservable(obj)) {\n      return _observableStrategy;\n    }\n\n    throw invalidPipeArgumentError(AsyncPipe, obj);\n  }\n\n  private _dispose(): void {\n    this._strategy.dispose(this._subscription!);\n    this._latestValue = null;\n    this._subscription = null;\n    this._obj = null;\n  }\n\n  private _updateLatestValue(async: any, value: Object): void {\n    if (async === this._obj) {\n      this._latestValue = value;\n      this._ref.markForCheck();\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Pipe, PipeTransform} from '@angular/core';\nimport {invalidPipeArgumentError} from './invalid_pipe_argument_error';\n\n/**\n * Transforms text to all lower case.\n *\n * @see `UpperCasePipe`\n * @see `TitleCasePipe`\n * @usageNotes\n *\n * The following example defines a view that allows the user to enter\n * text, and then uses the pipe to convert the input text to all lower case.\n *\n * <code-example path=\"common/pipes/ts/lowerupper_pipe.ts\" region='LowerUpperPipe'></code-example>\n *\n * @ngModule CommonModule\n * @publicApi\n */\n@Pipe({name: 'lowercase'})\nexport class LowerCasePipe implements PipeTransform {\n  /**\n   * @param value The string to transform to lower case.\n   */\n  transform(value: string): string {\n    if (!value) return value;\n    if (typeof value !== 'string') {\n      throw invalidPipeArgumentError(LowerCasePipe, value);\n    }\n    return value.toLowerCase();\n  }\n}\n\n//\n// Regex below matches any Unicode word and compatible with ES5. In ES2018 the same result\n// can be achieved by using /\\p{L}\\S*/gu and also known as Unicode Property Escapes\n// (http://2ality.com/2017/07/regexp-unicode-property-escapes.html). Since there is no\n// transpilation of this functionality down to ES5 without external tool, the only solution is\n// to use already transpiled form. Example can be found here -\n// https://mothereff.in/regexpu#input=var+regex+%3D+/%5Cp%7BL%7D/u%3B&unicodePropertyEscape=1\n//\n\nconst unicodeWordMatch =\n    /(?:[A-Za-z\\xAA\\xB5\\xBA\\xC0-\\xD6\\xD8-\\xF6\\xF8-\\u02C1\\u02C6-\\u02D1\\u02E0-\\u02E4\\u02EC\\u02EE\\u0370-\\u0374\\u0376\\u0377\\u037A-\\u037D\\u037F\\u0386\\u0388-\\u038A\\u038C\\u038E-\\u03A1\\u03A3-\\u03F5\\u03F7-\\u0481\\u048A-\\u052F\\u0531-\\u0556\\u0559\\u0561-\\u0587\\u05D0-\\u05EA\\u05F0-\\u05F2\\u0620-\\u064A\\u066E\\u066F\\u0671-\\u06D3\\u06D5\\u06E5\\u06E6\\u06EE\\u06EF\\u06FA-\\u06FC\\u06FF\\u0710\\u0712-\\u072F\\u074D-\\u07A5\\u07B1\\u07CA-\\u07EA\\u07F4\\u07F5\\u07FA\\u0800-\\u0815\\u081A\\u0824\\u0828\\u0840-\\u0858\\u0860-\\u086A\\u08A0-\\u08B4\\u08B6-\\u08BD\\u0904-\\u0939\\u093D\\u0950\\u0958-\\u0961\\u0971-\\u0980\\u0985-\\u098C\\u098F\\u0990\\u0993-\\u09A8\\u09AA-\\u09B0\\u09B2\\u09B6-\\u09B9\\u09BD\\u09CE\\u09DC\\u09DD\\u09DF-\\u09E1\\u09F0\\u09F1\\u09FC\\u0A05-\\u0A0A\\u0A0F\\u0A10\\u0A13-\\u0A28\\u0A2A-\\u0A30\\u0A32\\u0A33\\u0A35\\u0A36\\u0A38\\u0A39\\u0A59-\\u0A5C\\u0A5E\\u0A72-\\u0A74\\u0A85-\\u0A8D\\u0A8F-\\u0A91\\u0A93-\\u0AA8\\u0AAA-\\u0AB0\\u0AB2\\u0AB3\\u0AB5-\\u0AB9\\u0ABD\\u0AD0\\u0AE0\\u0AE1\\u0AF9\\u0B05-\\u0B0C\\u0B0F\\u0B10\\u0B13-\\u0B28\\u0B2A-\\u0B30\\u0B32\\u0B33\\u0B35-\\u0B39\\u0B3D\\u0B5C\\u0B5D\\u0B5F-\\u0B61\\u0B71\\u0B83\\u0B85-\\u0B8A\\u0B8E-\\u0B90\\u0B92-\\u0B95\\u0B99\\u0B9A\\u0B9C\\u0B9E\\u0B9F\\u0BA3\\u0BA4\\u0BA8-\\u0BAA\\u0BAE-\\u0BB9\\u0BD0\\u0C05-\\u0C0C\\u0C0E-\\u0C10\\u0C12-\\u0C28\\u0C2A-\\u0C39\\u0C3D\\u0C58-\\u0C5A\\u0C60\\u0C61\\u0C80\\u0C85-\\u0C8C\\u0C8E-\\u0C90\\u0C92-\\u0CA8\\u0CAA-\\u0CB3\\u0CB5-\\u0CB9\\u0CBD\\u0CDE\\u0CE0\\u0CE1\\u0CF1\\u0CF2\\u0D05-\\u0D0C\\u0D0E-\\u0D10\\u0D12-\\u0D3A\\u0D3D\\u0D4E\\u0D54-\\u0D56\\u0D5F-\\u0D61\\u0D7A-\\u0D7F\\u0D85-\\u0D96\\u0D9A-\\u0DB1\\u0DB3-\\u0DBB\\u0DBD\\u0DC0-\\u0DC6\\u0E01-\\u0E30\\u0E32\\u0E33\\u0E40-\\u0E46\\u0E81\\u0E82\\u0E84\\u0E87\\u0E88\\u0E8A\\u0E8D\\u0E94-\\u0E97\\u0E99-\\u0E9F\\u0EA1-\\u0EA3\\u0EA5\\u0EA7\\u0EAA\\u0EAB\\u0EAD-\\u0EB0\\u0EB2\\u0EB3\\u0EBD\\u0EC0-\\u0EC4\\u0EC6\\u0EDC-\\u0EDF\\u0F00\\u0F40-\\u0F47\\u0F49-\\u0F6C\\u0F88-\\u0F8C\\u1000-\\u102A\\u103F\\u1050-\\u1055\\u105A-\\u105D\\u1061\\u1065\\u1066\\u106E-\\u1070\\u1075-\\u1081\\u108E\\u10A0-\\u10C5\\u10C7\\u10CD\\u10D0-\\u10FA\\u10FC-\\u1248\\u124A-\\u124D\\u1250-\\u1256\\u1258\\u125A-\\u125D\\u1260-\\u1288\\u128A-\\u128D\\u1290-\\u12B0\\u12B2-\\u12B5\\u12B8-\\u12BE\\u12C0\\u12C2-\\u12C5\\u12C8-\\u12D6\\u12D8-\\u1310\\u1312-\\u1315\\u1318-\\u135A\\u1380-\\u138F\\u13A0-\\u13F5\\u13F8-\\u13FD\\u1401-\\u166C\\u166F-\\u167F\\u1681-\\u169A\\u16A0-\\u16EA\\u16F1-\\u16F8\\u1700-\\u170C\\u170E-\\u1711\\u1720-\\u1731\\u1740-\\u1751\\u1760-\\u176C\\u176E-\\u1770\\u1780-\\u17B3\\u17D7\\u17DC\\u1820-\\u1877\\u1880-\\u1884\\u1887-\\u18A8\\u18AA\\u18B0-\\u18F5\\u1900-\\u191E\\u1950-\\u196D\\u1970-\\u1974\\u1980-\\u19AB\\u19B0-\\u19C9\\u1A00-\\u1A16\\u1A20-\\u1A54\\u1AA7\\u1B05-\\u1B33\\u1B45-\\u1B4B\\u1B83-\\u1BA0\\u1BAE\\u1BAF\\u1BBA-\\u1BE5\\u1C00-\\u1C23\\u1C4D-\\u1C4F\\u1C5A-\\u1C7D\\u1C80-\\u1C88\\u1CE9-\\u1CEC\\u1CEE-\\u1CF1\\u1CF5\\u1CF6\\u1D00-\\u1DBF\\u1E00-\\u1F15\\u1F18-\\u1F1D\\u1F20-\\u1F45\\u1F48-\\u1F4D\\u1F50-\\u1F57\\u1F59\\u1F5B\\u1F5D\\u1F5F-\\u1F7D\\u1F80-\\u1FB4\\u1FB6-\\u1FBC\\u1FBE\\u1FC2-\\u1FC4\\u1FC6-\\u1FCC\\u1FD0-\\u1FD3\\u1FD6-\\u1FDB\\u1FE0-\\u1FEC\\u1FF2-\\u1FF4\\u1FF6-\\u1FFC\\u2071\\u207F\\u2090-\\u209C\\u2102\\u2107\\u210A-\\u2113\\u2115\\u2119-\\u211D\\u2124\\u2126\\u2128\\u212A-\\u212D\\u212F-\\u2139\\u213C-\\u213F\\u2145-\\u2149\\u214E\\u2183\\u2184\\u2C00-\\u2C2E\\u2C30-\\u2C5E\\u2C60-\\u2CE4\\u2CEB-\\u2CEE\\u2CF2\\u2CF3\\u2D00-\\u2D25\\u2D27\\u2D2D\\u2D30-\\u2D67\\u2D6F\\u2D80-\\u2D96\\u2DA0-\\u2DA6\\u2DA8-\\u2DAE\\u2DB0-\\u2DB6\\u2DB8-\\u2DBE\\u2DC0-\\u2DC6\\u2DC8-\\u2DCE\\u2DD0-\\u2DD6\\u2DD8-\\u2DDE\\u2E2F\\u3005\\u3006\\u3031-\\u3035\\u303B\\u303C\\u3041-\\u3096\\u309D-\\u309F\\u30A1-\\u30FA\\u30FC-\\u30FF\\u3105-\\u312E\\u3131-\\u318E\\u31A0-\\u31BA\\u31F0-\\u31FF\\u3400-\\u4DB5\\u4E00-\\u9FEA\\uA000-\\uA48C\\uA4D0-\\uA4FD\\uA500-\\uA60C\\uA610-\\uA61F\\uA62A\\uA62B\\uA640-\\uA66E\\uA67F-\\uA69D\\uA6A0-\\uA6E5\\uA717-\\uA71F\\uA722-\\uA788\\uA78B-\\uA7AE\\uA7B0-\\uA7B7\\uA7F7-\\uA801\\uA803-\\uA805\\uA807-\\uA80A\\uA80C-\\uA822\\uA840-\\uA873\\uA882-\\uA8B3\\uA8F2-\\uA8F7\\uA8FB\\uA8FD\\uA90A-\\uA925\\uA930-\\uA946\\uA960-\\uA97C\\uA984-\\uA9B2\\uA9CF\\uA9E0-\\uA9E4\\uA9E6-\\uA9EF\\uA9FA-\\uA9FE\\uAA00-\\uAA28\\uAA40-\\uAA42\\uAA44-\\uAA4B\\uAA60-\\uAA76\\uAA7A\\uAA7E-\\uAAAF\\uAAB1\\uAAB5\\uAAB6\\uAAB9-\\uAABD\\uAAC0\\uAAC2\\uAADB-\\uAADD\\uAAE0-\\uAAEA\\uAAF2-\\uAAF4\\uAB01-\\uAB06\\uAB09-\\uAB0E\\uAB11-\\uAB16\\uAB20-\\uAB26\\uAB28-\\uAB2E\\uAB30-\\uAB5A\\uAB5C-\\uAB65\\uAB70-\\uABE2\\uAC00-\\uD7A3\\uD7B0-\\uD7C6\\uD7CB-\\uD7FB\\uF900-\\uFA6D\\uFA70-\\uFAD9\\uFB00-\\uFB06\\uFB13-\\uFB17\\uFB1D\\uFB1F-\\uFB28\\uFB2A-\\uFB36\\uFB38-\\uFB3C\\uFB3E\\uFB40\\uFB41\\uFB43\\uFB44\\uFB46-\\uFBB1\\uFBD3-\\uFD3D\\uFD50-\\uFD8F\\uFD92-\\uFDC7\\uFDF0-\\uFDFB\\uFE70-\\uFE74\\uFE76-\\uFEFC\\uFF21-\\uFF3A\\uFF41-\\uFF5A\\uFF66-\\uFFBE\\uFFC2-\\uFFC7\\uFFCA-\\uFFCF\\uFFD2-\\uFFD7\\uFFDA-\\uFFDC]|\\uD800[\\uDC00-\\uDC0B\\uDC0D-\\uDC26\\uDC28-\\uDC3A\\uDC3C\\uDC3D\\uDC3F-\\uDC4D\\uDC50-\\uDC5D\\uDC80-\\uDCFA\\uDE80-\\uDE9C\\uDEA0-\\uDED0\\uDF00-\\uDF1F\\uDF2D-\\uDF40\\uDF42-\\uDF49\\uDF50-\\uDF75\\uDF80-\\uDF9D\\uDFA0-\\uDFC3\\uDFC8-\\uDFCF]|\\uD801[\\uDC00-\\uDC9D\\uDCB0-\\uDCD3\\uDCD8-\\uDCFB\\uDD00-\\uDD27\\uDD30-\\uDD63\\uDE00-\\uDF36\\uDF40-\\uDF55\\uDF60-\\uDF67]|\\uD802[\\uDC00-\\uDC05\\uDC08\\uDC0A-\\uDC35\\uDC37\\uDC38\\uDC3C\\uDC3F-\\uDC55\\uDC60-\\uDC76\\uDC80-\\uDC9E\\uDCE0-\\uDCF2\\uDCF4\\uDCF5\\uDD00-\\uDD15\\uDD20-\\uDD39\\uDD80-\\uDDB7\\uDDBE\\uDDBF\\uDE00\\uDE10-\\uDE13\\uDE15-\\uDE17\\uDE19-\\uDE33\\uDE60-\\uDE7C\\uDE80-\\uDE9C\\uDEC0-\\uDEC7\\uDEC9-\\uDEE4\\uDF00-\\uDF35\\uDF40-\\uDF55\\uDF60-\\uDF72\\uDF80-\\uDF91]|\\uD803[\\uDC00-\\uDC48\\uDC80-\\uDCB2\\uDCC0-\\uDCF2]|\\uD804[\\uDC03-\\uDC37\\uDC83-\\uDCAF\\uDCD0-\\uDCE8\\uDD03-\\uDD26\\uDD50-\\uDD72\\uDD76\\uDD83-\\uDDB2\\uDDC1-\\uDDC4\\uDDDA\\uDDDC\\uDE00-\\uDE11\\uDE13-\\uDE2B\\uDE80-\\uDE86\\uDE88\\uDE8A-\\uDE8D\\uDE8F-\\uDE9D\\uDE9F-\\uDEA8\\uDEB0-\\uDEDE\\uDF05-\\uDF0C\\uDF0F\\uDF10\\uDF13-\\uDF28\\uDF2A-\\uDF30\\uDF32\\uDF33\\uDF35-\\uDF39\\uDF3D\\uDF50\\uDF5D-\\uDF61]|\\uD805[\\uDC00-\\uDC34\\uDC47-\\uDC4A\\uDC80-\\uDCAF\\uDCC4\\uDCC5\\uDCC7\\uDD80-\\uDDAE\\uDDD8-\\uDDDB\\uDE00-\\uDE2F\\uDE44\\uDE80-\\uDEAA\\uDF00-\\uDF19]|\\uD806[\\uDCA0-\\uDCDF\\uDCFF\\uDE00\\uDE0B-\\uDE32\\uDE3A\\uDE50\\uDE5C-\\uDE83\\uDE86-\\uDE89\\uDEC0-\\uDEF8]|\\uD807[\\uDC00-\\uDC08\\uDC0A-\\uDC2E\\uDC40\\uDC72-\\uDC8F\\uDD00-\\uDD06\\uDD08\\uDD09\\uDD0B-\\uDD30\\uDD46]|\\uD808[\\uDC00-\\uDF99]|\\uD809[\\uDC80-\\uDD43]|[\\uD80C\\uD81C-\\uD820\\uD840-\\uD868\\uD86A-\\uD86C\\uD86F-\\uD872\\uD874-\\uD879][\\uDC00-\\uDFFF]|\\uD80D[\\uDC00-\\uDC2E]|\\uD811[\\uDC00-\\uDE46]|\\uD81A[\\uDC00-\\uDE38\\uDE40-\\uDE5E\\uDED0-\\uDEED\\uDF00-\\uDF2F\\uDF40-\\uDF43\\uDF63-\\uDF77\\uDF7D-\\uDF8F]|\\uD81B[\\uDF00-\\uDF44\\uDF50\\uDF93-\\uDF9F\\uDFE0\\uDFE1]|\\uD821[\\uDC00-\\uDFEC]|\\uD822[\\uDC00-\\uDEF2]|\\uD82C[\\uDC00-\\uDD1E\\uDD70-\\uDEFB]|\\uD82F[\\uDC00-\\uDC6A\\uDC70-\\uDC7C\\uDC80-\\uDC88\\uDC90-\\uDC99]|\\uD835[\\uDC00-\\uDC54\\uDC56-\\uDC9C\\uDC9E\\uDC9F\\uDCA2\\uDCA5\\uDCA6\\uDCA9-\\uDCAC\\uDCAE-\\uDCB9\\uDCBB\\uDCBD-\\uDCC3\\uDCC5-\\uDD05\\uDD07-\\uDD0A\\uDD0D-\\uDD14\\uDD16-\\uDD1C\\uDD1E-\\uDD39\\uDD3B-\\uDD3E\\uDD40-\\uDD44\\uDD46\\uDD4A-\\uDD50\\uDD52-\\uDEA5\\uDEA8-\\uDEC0\\uDEC2-\\uDEDA\\uDEDC-\\uDEFA\\uDEFC-\\uDF14\\uDF16-\\uDF34\\uDF36-\\uDF4E\\uDF50-\\uDF6E\\uDF70-\\uDF88\\uDF8A-\\uDFA8\\uDFAA-\\uDFC2\\uDFC4-\\uDFCB]|\\uD83A[\\uDC00-\\uDCC4\\uDD00-\\uDD43]|\\uD83B[\\uDE00-\\uDE03\\uDE05-\\uDE1F\\uDE21\\uDE22\\uDE24\\uDE27\\uDE29-\\uDE32\\uDE34-\\uDE37\\uDE39\\uDE3B\\uDE42\\uDE47\\uDE49\\uDE4B\\uDE4D-\\uDE4F\\uDE51\\uDE52\\uDE54\\uDE57\\uDE59\\uDE5B\\uDE5D\\uDE5F\\uDE61\\uDE62\\uDE64\\uDE67-\\uDE6A\\uDE6C-\\uDE72\\uDE74-\\uDE77\\uDE79-\\uDE7C\\uDE7E\\uDE80-\\uDE89\\uDE8B-\\uDE9B\\uDEA1-\\uDEA3\\uDEA5-\\uDEA9\\uDEAB-\\uDEBB]|\\uD869[\\uDC00-\\uDED6\\uDF00-\\uDFFF]|\\uD86D[\\uDC00-\\uDF34\\uDF40-\\uDFFF]|\\uD86E[\\uDC00-\\uDC1D\\uDC20-\\uDFFF]|\\uD873[\\uDC00-\\uDEA1\\uDEB0-\\uDFFF]|\\uD87A[\\uDC00-\\uDFE0]|\\uD87E[\\uDC00-\\uDE1D])\\S*/g;\n\n/**\n * Transforms text to title case.\n * Capitalizes the first letter of each word and transforms the\n * rest of the word to lower case.\n * Words are delimited by any whitespace character, such as a space, tab, or line-feed character.\n *\n * @see `LowerCasePipe`\n * @see `UpperCasePipe`\n *\n * @usageNotes\n * The following example shows the result of transforming various strings into title case.\n *\n * <code-example path=\"common/pipes/ts/titlecase_pipe.ts\" region='TitleCasePipe'></code-example>\n *\n * @ngModule CommonModule\n * @publicApi\n */\n@Pipe({name: 'titlecase'})\nexport class TitleCasePipe implements PipeTransform {\n  /**\n   * @param value The string to transform to title case.\n   */\n  transform(value: string): string {\n    if (!value) return value;\n    if (typeof value !== 'string') {\n      throw invalidPipeArgumentError(TitleCasePipe, value);\n    }\n\n    return value.replace(\n        unicodeWordMatch, (txt => txt[0].toUpperCase() + txt.substr(1).toLowerCase()));\n  }\n}\n\n/**\n * Transforms text to all upper case.\n * @see `LowerCasePipe`\n * @see `TitleCasePipe`\n *\n * @ngModule CommonModule\n * @publicApi\n */\n@Pipe({name: 'uppercase'})\nexport class UpperCasePipe implements PipeTransform {\n  /**\n   * @param value The string to transform to upper case.\n   */\n  transform(value: string): string {\n    if (!value) return value;\n    if (typeof value !== 'string') {\n      throw invalidPipeArgumentError(UpperCasePipe, value);\n    }\n    return value.toUpperCase();\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Inject, LOCALE_ID, Pipe, PipeTransform} from '@angular/core';\nimport {formatDate} from '../i18n/format_date';\nimport {invalidPipeArgumentError} from './invalid_pipe_argument_error';\n\n// clang-format off\n/**\n * @ngModule CommonModule\n * @description\n *\n * Formats a date value according to locale rules.\n *\n * Only the `en-US` locale data comes with Angular. To localize dates\n * in another language, you must import the corresponding locale data.\n * See the [I18n guide](guide/i18n#i18n-pipes) for more information.\n *\n * @see `formatDate()`\n *\n *\n * @usageNotes\n *\n * The result of this pipe is not reevaluated when the input is mutated. To avoid the need to\n * reformat the date on every change-detection cycle, treat the date as an immutable object\n * and change the reference when the pipe needs to run again.\n *\n * ### Pre-defined format options\n *\n * Examples are given in `en-US` locale.\n *\n * - `'short'`: equivalent to `'M/d/yy, h:mm a'` (`6/15/15, 9:03 AM`).\n * - `'medium'`: equivalent to `'MMM d, y, h:mm:ss a'` (`Jun 15, 2015, 9:03:01 AM`).\n * - `'long'`: equivalent to `'MMMM d, y, h:mm:ss a z'` (`June 15, 2015 at 9:03:01 AM\n * GMT+1`).\n * - `'full'`: equivalent to `'EEEE, MMMM d, y, h:mm:ss a zzzz'` (`Monday, June 15, 2015 at\n * 9:03:01 AM GMT+01:00`).\n * - `'shortDate'`: equivalent to `'M/d/yy'` (`6/15/15`).\n * - `'mediumDate'`: equivalent to `'MMM d, y'` (`Jun 15, 2015`).\n * - `'longDate'`: equivalent to `'MMMM d, y'` (`June 15, 2015`).\n * - `'fullDate'`: equivalent to `'EEEE, MMMM d, y'` (`Monday, June 15, 2015`).\n * - `'shortTime'`: equivalent to `'h:mm a'` (`9:03 AM`).\n * - `'mediumTime'`: equivalent to `'h:mm:ss a'` (`9:03:01 AM`).\n * - `'longTime'`: equivalent to `'h:mm:ss a z'` (`9:03:01 AM GMT+1`).\n * - `'fullTime'`: equivalent to `'h:mm:ss a zzzz'` (`9:03:01 AM GMT+01:00`).\n *\n * ### Custom format options\n *\n * You can construct a format string using symbols to specify the components\n * of a date-time value, as described in the following table.\n * Format details depend on the locale.\n * Fields marked with (*) are only available in the extra data set for the given locale.\n *\n *  | Field type         | Format      | Description                                                   | Example Value                                              |\n *  |--------------------|-------------|---------------------------------------------------------------|------------------------------------------------------------|\n *  | Era                | G, GG & GGG | Abbreviated                                                   | AD                                                         |\n *  |                    | GGGG        | Wide                                                          | Anno Domini                                                |\n *  |                    | GGGGG       | Narrow                                                        | A                                                          |\n *  | Year               | y           | Numeric: minimum digits                                       | 2, 20, 201, 2017, 20173                                    |\n *  |                    | yy          | Numeric: 2 digits + zero padded                               | 02, 20, 01, 17, 73                                         |\n *  |                    | yyy         | Numeric: 3 digits + zero padded                               | 002, 020, 201, 2017, 20173                                 |\n *  |                    | yyyy        | Numeric: 4 digits or more + zero padded                       | 0002, 0020, 0201, 2017, 20173                              |\n *  | Month              | M           | Numeric: 1 digit                                              | 9, 12                                                      |\n *  |                    | MM          | Numeric: 2 digits + zero padded                               | 09, 12                                                     |\n *  |                    | MMM         | Abbreviated                                                   | Sep                                                        |\n *  |                    | MMMM        | Wide                                                          | September                                                  |\n *  |                    | MMMMM       | Narrow                                                        | S                                                          |\n *  | Month standalone   | L           | Numeric: 1 digit                                              | 9, 12                                                      |\n *  |                    | LL          | Numeric: 2 digits + zero padded                               | 09, 12                                                     |\n *  |                    | LLL         | Abbreviated                                                   | Sep                                                        |\n *  |                    | LLLL        | Wide                                                          | September                                                  |\n *  |                    | LLLLL       | Narrow                                                        | S                                                          |\n *  | Week of year       | w           | Numeric: minimum digits                                       | 1... 53                                                    |\n *  |                    | ww          | Numeric: 2 digits + zero padded                               | 01... 53                                                   |\n *  | Week of month      | W           | Numeric: 1 digit                                              | 1... 5                                                     |\n *  | Day of month       | d           | Numeric: minimum digits                                       | 1                                                          |\n *  |                    | dd          | Numeric: 2 digits + zero padded                               | 01                                                          |\n *  | Week day           | E, EE & EEE | Abbreviated                                                   | Tue                                                        |\n *  |                    | EEEE        | Wide                                                          | Tuesday                                                    |\n *  |                    | EEEEE       | Narrow                                                        | T                                                          |\n *  |                    | EEEEEE      | Short                                                         | Tu                                                         |\n *  | Period             | a, aa & aaa | Abbreviated                                                   | am/pm or AM/PM                                             |\n *  |                    | aaaa        | Wide (fallback to `a` when missing)                           | ante meridiem/post meridiem                                |\n *  |                    | aaaaa       | Narrow                                                        | a/p                                                        |\n *  | Period*            | B, BB & BBB | Abbreviated                                                   | mid.                                                       |\n *  |                    | BBBB        | Wide                                                          | am, pm, midnight, noon, morning, afternoon, evening, night |\n *  |                    | BBBBB       | Narrow                                                        | md                                                         |\n *  | Period standalone* | b, bb & bbb | Abbreviated                                                   | mid.                                                       |\n *  |                    | bbbb        | Wide                                                          | am, pm, midnight, noon, morning, afternoon, evening, night |\n *  |                    | bbbbb       | Narrow                                                        | md                                                         |\n *  | Hour 1-12          | h           | Numeric: minimum digits                                       | 1, 12                                                      |\n *  |                    | hh          | Numeric: 2 digits + zero padded                               | 01, 12                                                     |\n *  | Hour 0-23          | H           | Numeric: minimum digits                                       | 0, 23                                                      |\n *  |                    | HH          | Numeric: 2 digits + zero padded                               | 00, 23                                                     |\n *  | Minute             | m           | Numeric: minimum digits                                       | 8, 59                                                      |\n *  |                    | mm          | Numeric: 2 digits + zero padded                               | 08, 59                                                     |\n *  | Second             | s           | Numeric: minimum digits                                       | 0... 59                                                    |\n *  |                    | ss          | Numeric: 2 digits + zero padded                               | 00... 59                                                   |\n *  | Fractional seconds | S           | Numeric: 1 digit                                              | 0... 9                                                     |\n *  |                    | SS          | Numeric: 2 digits + zero padded                               | 00... 99                                                   |\n *  |                    | SSS         | Numeric: 3 digits + zero padded (= milliseconds)              | 000... 999                                                 |\n *  | Zone               | z, zz & zzz | Short specific non location format (fallback to O)            | GMT-8                                                      |\n *  |                    | zzzz        | Long specific non location format (fallback to OOOO)          | GMT-08:00                                                  |\n *  |                    | Z, ZZ & ZZZ | ISO8601 basic format                                          | -0800                                                      |\n *  |                    | ZZZZ        | Long localized GMT format                                     | GMT-8:00                                                   |\n *  |                    | ZZZZZ       | ISO8601 extended format + Z indicator for offset 0 (= XXXXX)  | -08:00                                                     |\n *  |                    | O, OO & OOO | Short localized GMT format                                    | GMT-8                                                      |\n *  |                    | OOOO        | Long localized GMT format                                     | GMT-08:00                                                  |\n *\n * Note that timezone correction is not applied to an ISO string that has no time component, such as \"2016-09-19\"\n *\n * ### Format examples\n *\n * These examples transform a date into various formats,\n * assuming that `dateObj` is a JavaScript `Date` object for\n * year: 2015, month: 6, day: 15, hour: 21, minute: 43, second: 11,\n * given in the local time for the `en-US` locale.\n *\n * ```\n * {{ dateObj | date }}               // output is 'Jun 15, 2015'\n * {{ dateObj | date:'medium' }}      // output is 'Jun 15, 2015, 9:43:11 PM'\n * {{ dateObj | date:'shortTime' }}   // output is '9:43 PM'\n * {{ dateObj | date:'mm:ss' }}       // output is '43:11'\n * ```\n *\n * ### Usage example\n *\n * The following component uses a date pipe to display the current date in different formats.\n *\n * ```\n * @Component({\n *  selector: 'date-pipe',\n *  template: `<div>\n *    <p>Today is {{today | date}}</p>\n *    <p>Or if you prefer, {{today | date:'fullDate'}}</p>\n *    <p>The time is {{today | date:'h:mm a z'}}</p>\n *  </div>`\n * })\n * // Get the current date and time as a date-time value.\n * export class DatePipeComponent {\n *   today: number = Date.now();\n * }\n * ```\n *\n * @publicApi\n */\n// clang-format on\n@Pipe({name: 'date', pure: true})\nexport class DatePipe implements PipeTransform {\n  constructor(@Inject(LOCALE_ID) private locale: string) {}\n\n  /**\n   * @param value The date expression: a `Date` object,  a number\n   * (milliseconds since UTC epoch), or an ISO string (https://www.w3.org/TR/NOTE-datetime).\n   * @param format The date/time components to include, using predefined options or a\n   * custom format string.\n   * @param timezone A timezone offset (such as `'+0430'`), or a standard\n   * UTC/GMT or continental US timezone abbreviation.\n   * When not supplied, uses the end-user's local system timezone.\n   * @param locale A locale code for the locale format rules to use.\n   * When not supplied, uses the value of `LOCALE_ID`, which is `en-US` by default.\n   * See [Setting your app locale](guide/i18n#setting-up-the-locale-of-your-app).\n   * @returns A date string in the desired format.\n   */\n  transform(value: any, format = 'mediumDate', timezone?: string, locale?: string): string|null {\n    if (value == null || value === '' || value !== value) return null;\n\n    try {\n      return formatDate(value, format, locale || this.locale, timezone);\n    } catch (error) {\n      throw invalidPipeArgumentError(DatePipe, error.message);\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Pipe, PipeTransform} from '@angular/core';\n\nimport {getPluralCategory, NgLocalization} from '../i18n/localization';\n\nimport {invalidPipeArgumentError} from './invalid_pipe_argument_error';\n\nconst _INTERPOLATION_REGEXP: RegExp = /#/g;\n\n/**\n * @ngModule CommonModule\n * @description\n *\n * Maps a value to a string that pluralizes the value according to locale rules.\n *\n * @usageNotes\n *\n * ### Example\n *\n * {@example common/pipes/ts/i18n_pipe.ts region='I18nPluralPipeComponent'}\n *\n * @publicApi\n */\n@Pipe({name: 'i18nPlural', pure: true})\nexport class I18nPluralPipe implements PipeTransform {\n  constructor(private _localization: NgLocalization) {}\n\n  /**\n   * @param value the number to be formatted\n   * @param pluralMap an object that mimics the ICU format, see\n   * http://userguide.icu-project.org/formatparse/messages.\n   * @param locale a `string` defining the locale to use (uses the current {@link LOCALE_ID} by\n   * default).\n   */\n  transform(value: number, pluralMap: {[count: string]: string}, locale?: string): string {\n    if (value == null) return '';\n\n    if (typeof pluralMap !== 'object' || pluralMap === null) {\n      throw invalidPipeArgumentError(I18nPluralPipe, pluralMap);\n    }\n\n    const key = getPluralCategory(value, Object.keys(pluralMap), this._localization, locale);\n\n    return pluralMap[key].replace(_INTERPOLATION_REGEXP, value.toString());\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Pipe, PipeTransform} from '@angular/core';\nimport {invalidPipeArgumentError} from './invalid_pipe_argument_error';\n\n/**\n * @ngModule CommonModule\n * @description\n *\n * Generic selector that displays the string that matches the current value.\n *\n * If none of the keys of the `mapping` match the `value`, then the content\n * of the `other` key is returned when present, otherwise an empty string is returned.\n *\n * @usageNotes\n *\n * ### Example\n *\n * {@example common/pipes/ts/i18n_pipe.ts region='I18nSelectPipeComponent'}\n *\n * @publicApi\n */\n@Pipe({name: 'i18nSelect', pure: true})\nexport class I18nSelectPipe implements PipeTransform {\n  /**\n   * @param value a string to be internationalized.\n   * @param mapping an object that indicates the text that should be displayed\n   * for different values of the provided `value`.\n   */\n  transform(value: string|null|undefined, mapping: {[key: string]: string}): string {\n    if (value == null) return '';\n\n    if (typeof mapping !== 'object' || typeof value !== 'string') {\n      throw invalidPipeArgumentError(I18nSelectPipe, mapping);\n    }\n\n    if (mapping.hasOwnProperty(value)) {\n      return mapping[value];\n    }\n\n    if (mapping.hasOwnProperty('other')) {\n      return mapping['other'];\n    }\n\n    return '';\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Pipe, PipeTransform} from '@angular/core';\n\n/**\n * @ngModule CommonModule\n * @description\n *\n * Converts a value into its JSON-format representation.  Useful for debugging.\n *\n * @usageNotes\n *\n * The following component uses a JSON pipe to convert an object\n * to JSON format, and displays the string in both formats for comparison.\n *\n * {@example common/pipes/ts/json_pipe.ts region='JsonPipe'}\n *\n * @publicApi\n */\n@Pipe({name: 'json', pure: false})\nexport class JsonPipe implements PipeTransform {\n  /**\n   * @param value A value of any type to convert into a JSON-format string.\n   */\n  transform(value: any): string {\n    return JSON.stringify(value, null, 2);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {KeyValueChangeRecord, KeyValueChanges, KeyValueDiffer, KeyValueDiffers, Pipe, PipeTransform} from '@angular/core';\n\nfunction makeKeyValuePair<K, V>(key: K, value: V): KeyValue<K, V> {\n  return {key: key, value: value};\n}\n\n/**\n * A key value pair.\n * Usually used to represent the key value pairs from a Map or Object.\n *\n * @publicApi\n */\nexport interface KeyValue<K, V> {\n  key: K;\n  value: V;\n}\n\n/**\n * @ngModule CommonModule\n * @description\n *\n * Transforms Object or Map into an array of key value pairs.\n *\n * The output array will be ordered by keys.\n * By default the comparator will be by Unicode point value.\n * You can optionally pass a compareFn if your keys are complex types.\n *\n * @usageNotes\n * ### Examples\n *\n * This examples show how an Object or a Map can be iterated by ngFor with the use of this\n * keyvalue pipe.\n *\n * {@example common/pipes/ts/keyvalue_pipe.ts region='KeyValuePipe'}\n *\n * @publicApi\n */\n@Pipe({name: 'keyvalue', pure: false})\nexport class KeyValuePipe implements PipeTransform {\n  constructor(private readonly differs: KeyValueDiffers) {}\n\n  private differ!: KeyValueDiffer<any, any>;\n  private keyValues: Array<KeyValue<any, any>> = [];\n\n  transform<K, V>(input: null, compareFn?: (a: KeyValue<K, V>, b: KeyValue<K, V>) => number): null;\n  transform<V>(\n      input: {[key: string]: V}|ReadonlyMap<string, V>,\n      compareFn?: (a: KeyValue<string, V>, b: KeyValue<string, V>) => number):\n      Array<KeyValue<string, V>>;\n  transform<V>(\n      input: {[key: string]: V}|ReadonlyMap<string, V>|null,\n      compareFn?: (a: KeyValue<string, V>, b: KeyValue<string, V>) => number):\n      Array<KeyValue<string, V>>|null;\n  transform<V>(\n      input: {[key: number]: V}|ReadonlyMap<number, V>,\n      compareFn?: (a: KeyValue<number, V>, b: KeyValue<number, V>) => number):\n      Array<KeyValue<number, V>>;\n  transform<V>(\n      input: {[key: number]: V}|ReadonlyMap<number, V>|null,\n      compareFn?: (a: KeyValue<number, V>, b: KeyValue<number, V>) => number):\n      Array<KeyValue<number, V>>|null;\n  transform<K, V>(\n      input: ReadonlyMap<K, V>,\n      compareFn?: (a: KeyValue<K, V>, b: KeyValue<K, V>) => number): Array<KeyValue<K, V>>;\n  transform<K, V>(\n      input: ReadonlyMap<K, V>|null,\n      compareFn?: (a: KeyValue<K, V>, b: KeyValue<K, V>) => number): Array<KeyValue<K, V>>|null;\n  transform<K, V>(\n      input: null|{[key: string]: V, [key: number]: V}|ReadonlyMap<K, V>,\n      compareFn: (a: KeyValue<K, V>, b: KeyValue<K, V>) => number = defaultComparator):\n      Array<KeyValue<K, V>>|null {\n    if (!input || (!(input instanceof Map) && typeof input !== 'object')) {\n      return null;\n    }\n\n    if (!this.differ) {\n      // make a differ for whatever type we've been passed in\n      this.differ = this.differs.find(input).create();\n    }\n\n    const differChanges: KeyValueChanges<K, V>|null = this.differ.diff(input as any);\n\n    if (differChanges) {\n      this.keyValues = [];\n      differChanges.forEachItem((r: KeyValueChangeRecord<K, V>) => {\n        this.keyValues.push(makeKeyValuePair(r.key, r.currentValue!));\n      });\n      this.keyValues.sort(compareFn);\n    }\n    return this.keyValues;\n  }\n}\n\nexport function defaultComparator<K, V>(\n    keyValueA: KeyValue<K, V>, keyValueB: KeyValue<K, V>): number {\n  const a = keyValueA.key;\n  const b = keyValueB.key;\n  // if same exit with 0;\n  if (a === b) return 0;\n  // make sure that undefined are at the end of the sort.\n  if (a === undefined) return 1;\n  if (b === undefined) return -1;\n  // make sure that nulls are at the end of the sort.\n  if (a === null) return 1;\n  if (b === null) return -1;\n  if (typeof a == 'string' && typeof b == 'string') {\n    return a < b ? -1 : 1;\n  }\n  if (typeof a == 'number' && typeof b == 'number') {\n    return a - b;\n  }\n  if (typeof a == 'boolean' && typeof b == 'boolean') {\n    return a < b ? -1 : 1;\n  }\n  // `a` and `b` are of different types. Compare their string values.\n  const aString = String(a);\n  const bString = String(b);\n  return aString == bString ? 0 : aString < bString ? -1 : 1;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DEFAULT_CURRENCY_CODE, Inject, LOCALE_ID, Pipe, PipeTransform} from '@angular/core';\nimport {formatCurrency, formatNumber, formatPercent} from '../i18n/format_number';\nimport {getCurrencySymbol} from '../i18n/locale_data_api';\n\nimport {invalidPipeArgumentError} from './invalid_pipe_argument_error';\n\n\n/**\n * @ngModule CommonModule\n * @description\n *\n * Transforms a number into a string,\n * formatted according to locale rules that determine group sizing and\n * separator, decimal-point character, and other locale-specific\n * configurations.\n *\n * If no parameters are specified, the function rounds off to the nearest value using this\n * [rounding method](https://en.wikibooks.org/wiki/Arithmetic/Rounding).\n * The behavior differs from that of the JavaScript ```Math.round()``` function.\n * In the following case for example, the pipe rounds down where\n * ```Math.round()``` rounds up:\n *\n * ```html\n * -2.5 | number:'1.0-0'\n * > -3\n * Math.round(-2.5)\n * > -2\n * ```\n *\n * @see `formatNumber()`\n *\n * @usageNotes\n * The following code shows how the pipe transforms numbers\n * into text strings, according to various format specifications,\n * where the caller's default locale is `en-US`.\n *\n * ### Example\n *\n * <code-example path=\"common/pipes/ts/number_pipe.ts\" region='NumberPipe'></code-example>\n *\n * @publicApi\n */\n@Pipe({name: 'number'})\nexport class DecimalPipe implements PipeTransform {\n  constructor(@Inject(LOCALE_ID) private _locale: string) {}\n\n  /**\n   * @param value The number to be formatted.\n   * @param digitsInfo Decimal representation options, specified by a string\n   * in the following format:<br>\n   * <code>{minIntegerDigits}.{minFractionDigits}-{maxFractionDigits}</code>.\n   *   - `minIntegerDigits`: The minimum number of integer digits before the decimal point.\n   * Default is `1`.\n   *   - `minFractionDigits`: The minimum number of digits after the decimal point.\n   * Default is `0`.\n   *   - `maxFractionDigits`: The maximum number of digits after the decimal point.\n   * Default is `3`.\n   * @param locale A locale code for the locale format rules to use.\n   * When not supplied, uses the value of `LOCALE_ID`, which is `en-US` by default.\n   * See [Setting your app locale](guide/i18n#setting-up-the-locale-of-your-app).\n   */\n  transform(value: any, digitsInfo?: string, locale?: string): string|null {\n    if (isEmpty(value)) return null;\n\n    locale = locale || this._locale;\n\n    try {\n      const num = strToNumber(value);\n      return formatNumber(num, locale, digitsInfo);\n    } catch (error) {\n      throw invalidPipeArgumentError(DecimalPipe, error.message);\n    }\n  }\n}\n\n/**\n * @ngModule CommonModule\n * @description\n *\n * Transforms a number to a percentage\n * string, formatted according to locale rules that determine group sizing and\n * separator, decimal-point character, and other locale-specific\n * configurations.\n *\n * @see `formatPercent()`\n *\n * @usageNotes\n * The following code shows how the pipe transforms numbers\n * into text strings, according to various format specifications,\n * where the caller's default locale is `en-US`.\n *\n * <code-example path=\"common/pipes/ts/percent_pipe.ts\" region='PercentPipe'></code-example>\n *\n * @publicApi\n */\n@Pipe({name: 'percent'})\nexport class PercentPipe implements PipeTransform {\n  constructor(@Inject(LOCALE_ID) private _locale: string) {}\n\n  /**\n   *\n   * @param value The number to be formatted as a percentage.\n   * @param digitsInfo Decimal representation options, specified by a string\n   * in the following format:<br>\n   * <code>{minIntegerDigits}.{minFractionDigits}-{maxFractionDigits}</code>.\n   *   - `minIntegerDigits`: The minimum number of integer digits before the decimal point.\n   * Default is `1`.\n   *   - `minFractionDigits`: The minimum number of digits after the decimal point.\n   * Default is `0`.\n   *   - `maxFractionDigits`: The maximum number of digits after the decimal point.\n   * Default is `0`.\n   * @param locale A locale code for the locale format rules to use.\n   * When not supplied, uses the value of `LOCALE_ID`, which is `en-US` by default.\n   * See [Setting your app locale](guide/i18n#setting-up-the-locale-of-your-app).\n   */\n  transform(value: any, digitsInfo?: string, locale?: string): string|null {\n    if (isEmpty(value)) return null;\n    locale = locale || this._locale;\n    try {\n      const num = strToNumber(value);\n      return formatPercent(num, locale, digitsInfo);\n    } catch (error) {\n      throw invalidPipeArgumentError(PercentPipe, error.message);\n    }\n  }\n}\n\n/**\n * @ngModule CommonModule\n * @description\n *\n * Transforms a number to a currency string, formatted according to locale rules\n * that determine group sizing and separator, decimal-point character,\n * and other locale-specific configurations.\n *\n * {@a currency-code-deprecation}\n * <div class=\"alert is-helpful\">\n *\n * **Deprecation notice:**\n *\n * The default currency code is currently always `USD` but this is deprecated from v9.\n *\n * **In v11 the default currency code will be taken from the current locale identified by\n * the `LOCAL_ID` token. See the [i18n guide](guide/i18n#setting-up-the-locale-of-your-app) for\n * more information.**\n *\n * If you need the previous behavior then set it by creating a `DEFAULT_CURRENCY_CODE` provider in\n * your application `NgModule`:\n *\n * ```ts\n * {provide: DEFAULT_CURRENCY_CODE, useValue: 'USD'}\n * ```\n *\n * </div>\n *\n * @see `getCurrencySymbol()`\n * @see `formatCurrency()`\n *\n * @usageNotes\n * The following code shows how the pipe transforms numbers\n * into text strings, according to various format specifications,\n * where the caller's default locale is `en-US`.\n *\n * <code-example path=\"common/pipes/ts/currency_pipe.ts\" region='CurrencyPipe'></code-example>\n *\n * @publicApi\n */\n@Pipe({name: 'currency'})\nexport class CurrencyPipe implements PipeTransform {\n  constructor(\n      @Inject(LOCALE_ID) private _locale: string,\n      @Inject(DEFAULT_CURRENCY_CODE) private _defaultCurrencyCode: string = 'USD') {}\n\n  /**\n   *\n   * @param value The number to be formatted as currency.\n   * @param currencyCode The [ISO 4217](https://en.wikipedia.org/wiki/ISO_4217) currency code,\n   * such as `USD` for the US dollar and `EUR` for the euro. The default currency code can be\n   * configured using the `DEFAULT_CURRENCY_CODE` injection token.\n   * @param display The format for the currency indicator. One of the following:\n   *   - `code`: Show the code (such as `USD`).\n   *   - `symbol`(default): Show the symbol (such as `$`).\n   *   - `symbol-narrow`: Use the narrow symbol for locales that have two symbols for their\n   * currency.\n   * For example, the Canadian dollar CAD has the symbol `CA$` and the symbol-narrow `$`. If the\n   * locale has no narrow symbol, uses the standard symbol for the locale.\n   *   - String: Use the given string value instead of a code or a symbol.\n   * For example, an empty string will suppress the currency & symbol.\n   *   - Boolean (marked deprecated in v5): `true` for symbol and false for `code`.\n   *\n   * @param digitsInfo Decimal representation options, specified by a string\n   * in the following format:<br>\n   * <code>{minIntegerDigits}.{minFractionDigits}-{maxFractionDigits}</code>.\n   *   - `minIntegerDigits`: The minimum number of integer digits before the decimal point.\n   * Default is `1`.\n   *   - `minFractionDigits`: The minimum number of digits after the decimal point.\n   * Default is `2`.\n   *   - `maxFractionDigits`: The maximum number of digits after the decimal point.\n   * Default is `2`.\n   * If not provided, the number will be formatted with the proper amount of digits,\n   * depending on what the [ISO 4217](https://en.wikipedia.org/wiki/ISO_4217) specifies.\n   * For example, the Canadian dollar has 2 digits, whereas the Chilean peso has none.\n   * @param locale A locale code for the locale format rules to use.\n   * When not supplied, uses the value of `LOCALE_ID`, which is `en-US` by default.\n   * See [Setting your app locale](guide/i18n#setting-up-the-locale-of-your-app).\n   */\n  transform(\n      value: any, currencyCode?: string,\n      display: 'code'|'symbol'|'symbol-narrow'|string|boolean = 'symbol', digitsInfo?: string,\n      locale?: string): string|null {\n    if (isEmpty(value)) return null;\n\n    locale = locale || this._locale;\n\n    if (typeof display === 'boolean') {\n      if (<any>console && <any>console.warn) {\n        console.warn(\n            `Warning: the currency pipe has been changed in Angular v5. The symbolDisplay option (third parameter) is now a string instead of a boolean. The accepted values are \"code\", \"symbol\" or \"symbol-narrow\".`);\n      }\n      display = display ? 'symbol' : 'code';\n    }\n\n    let currency: string = currencyCode || this._defaultCurrencyCode;\n    if (display !== 'code') {\n      if (display === 'symbol' || display === 'symbol-narrow') {\n        currency = getCurrencySymbol(currency, display === 'symbol' ? 'wide' : 'narrow', locale);\n      } else {\n        currency = display;\n      }\n    }\n\n    try {\n      const num = strToNumber(value);\n      return formatCurrency(num, locale, currency, currencyCode, digitsInfo);\n    } catch (error) {\n      throw invalidPipeArgumentError(CurrencyPipe, error.message);\n    }\n  }\n}\n\nfunction isEmpty(value: any): boolean {\n  return value == null || value === '' || value !== value;\n}\n\n/**\n * Transforms a string into a number (if needed).\n */\nfunction strToNumber(value: number|string): number {\n  // Convert strings to numbers\n  if (typeof value === 'string' && !isNaN(Number(value) - parseFloat(value))) {\n    return Number(value);\n  }\n  if (typeof value !== 'number') {\n    throw new Error(`${value} is not a number`);\n  }\n  return value;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Pipe, PipeTransform} from '@angular/core';\nimport {invalidPipeArgumentError} from './invalid_pipe_argument_error';\n\n/**\n * @ngModule CommonModule\n * @description\n *\n * Creates a new `Array` or `String` containing a subset (slice) of the elements.\n *\n * @usageNotes\n *\n * All behavior is based on the expected behavior of the JavaScript API `Array.prototype.slice()`\n * and `String.prototype.slice()`.\n *\n * When operating on an `Array`, the returned `Array` is always a copy even when all\n * the elements are being returned.\n *\n * When operating on a blank value, the pipe returns the blank value.\n *\n * ### List Example\n *\n * This `ngFor` example:\n *\n * {@example common/pipes/ts/slice_pipe.ts region='SlicePipe_list'}\n *\n * produces the following:\n *\n * ```html\n * <li>b</li>\n * <li>c</li>\n * ```\n *\n * ### String Examples\n *\n * {@example common/pipes/ts/slice_pipe.ts region='SlicePipe_string'}\n *\n * @publicApi\n */\n@Pipe({name: 'slice', pure: false})\nexport class SlicePipe implements PipeTransform {\n  /**\n   * @param value a list or a string to be sliced.\n   * @param start the starting index of the subset to return:\n   *   - **a positive integer**: return the item at `start` index and all items after\n   *     in the list or string expression.\n   *   - **a negative integer**: return the item at `start` index from the end and all items after\n   *     in the list or string expression.\n   *   - **if positive and greater than the size of the expression**: return an empty list or\n   * string.\n   *   - **if negative and greater than the size of the expression**: return entire list or string.\n   * @param end the ending index of the subset to return:\n   *   - **omitted**: return all items until the end.\n   *   - **if positive**: return all items before `end` index of the list or string.\n   *   - **if negative**: return all items before `end` index from the end of the list or string.\n   */\n  transform<T>(value: ReadonlyArray<T>, start: number, end?: number): Array<T>;\n  transform(value: string, start: number, end?: number): string;\n  transform(value: null, start: number, end?: number): null;\n  transform(value: undefined, start: number, end?: number): undefined;\n  transform(value: any, start: number, end?: number): any {\n    if (value == null) return value;\n\n    if (!this.supports(value)) {\n      throw invalidPipeArgumentError(SlicePipe, value);\n    }\n\n    return value.slice(start, end);\n  }\n\n  private supports(obj: any): boolean {\n    return typeof obj === 'string' || Array.isArray(obj);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @module\n * @description\n * This module provides a set of common Pipes.\n */\nimport {AsyncPipe} from './async_pipe';\nimport {LowerCasePipe, TitleCasePipe, UpperCasePipe} from './case_conversion_pipes';\nimport {DatePipe} from './date_pipe';\nimport {I18nPluralPipe} from './i18n_plural_pipe';\nimport {I18nSelectPipe} from './i18n_select_pipe';\nimport {JsonPipe} from './json_pipe';\nimport {KeyValue, KeyValuePipe} from './keyvalue_pipe';\nimport {CurrencyPipe, DecimalPipe, PercentPipe} from './number_pipe';\nimport {SlicePipe} from './slice_pipe';\n\nexport {\n  AsyncPipe,\n  CurrencyPipe,\n  DatePipe,\n  DecimalPipe,\n  I18nPluralPipe,\n  I18nSelectPipe,\n  JsonPipe,\n  KeyValue,\n  KeyValuePipe,\n  LowerCasePipe,\n  PercentPipe,\n  SlicePipe,\n  TitleCasePipe,\n  UpperCasePipe,\n};\n\n\n/**\n * A collection of Angular pipes that are likely to be used in each and every application.\n */\nexport const COMMON_PIPES = [\n  AsyncPipe,\n  UpperCasePipe,\n  LowerCasePipe,\n  JsonPipe,\n  SlicePipe,\n  DecimalPipe,\n  PercentPipe,\n  TitleCasePipe,\n  CurrencyPipe,\n  DatePipe,\n  I18nPluralPipe,\n  I18nSelectPipe,\n  KeyValuePipe,\n];\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgModule} from '@angular/core';\nimport {COMMON_DIRECTIVES} from './directives/index';\nimport {NgLocaleLocalization, NgLocalization} from './i18n/localization';\nimport {COMMON_PIPES} from './pipes/index';\n\n\n// Note: This does not contain the location providers,\n// as they need some platform specific implementations to work.\n/**\n * Exports all the basic Angular directives and pipes,\n * such as `NgIf`, `NgForOf`, `DecimalPipe`, and so on.\n * Re-exported by `BrowserModule`, which is included automatically in the root\n * `AppModule` when you create a new app with the CLI `new` command.\n *\n * * The `providers` options configure the NgModule's injector to provide\n * localization dependencies to members.\n * * The `exports` options make the declared directives and pipes available for import\n * by other NgModules.\n *\n * @publicApi\n */\n@NgModule({\n  declarations: [COMMON_DIRECTIVES, COMMON_PIPES],\n  exports: [COMMON_DIRECTIVES, COMMON_PIPES],\n  providers: [\n    {provide: NgLocalization, useClass: NgLocaleLocalization},\n  ],\n})\nexport class CommonModule {\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport const PLATFORM_BROWSER_ID = 'browser';\nexport const PLATFORM_SERVER_ID = 'server';\nexport const PLATFORM_WORKER_APP_ID = 'browserWorkerApp';\nexport const PLATFORM_WORKER_UI_ID = 'browserWorkerUi';\n\n/**\n * Returns whether a platform id represents a browser platform.\n * @publicApi\n */\nexport function isPlatformBrowser(platformId: Object): boolean {\n  return platformId === PLATFORM_BROWSER_ID;\n}\n\n/**\n * Returns whether a platform id represents a server platform.\n * @publicApi\n */\nexport function isPlatformServer(platformId: Object): boolean {\n  return platformId === PLATFORM_SERVER_ID;\n}\n\n/**\n * Returns whether a platform id represents a web worker app platform.\n * @publicApi\n */\nexport function isPlatformWorkerApp(platformId: Object): boolean {\n  return platformId === PLATFORM_WORKER_APP_ID;\n}\n\n/**\n * Returns whether a platform id represents a web worker UI platform.\n * @publicApi\n */\nexport function isPlatformWorkerUi(platformId: Object): boolean {\n  return platformId === PLATFORM_WORKER_UI_ID;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @module\n * @description\n * Entry point for all public APIs of the common package.\n */\n\nimport {Version} from '@angular/core';\n\n/**\n * @publicApi\n */\nexport const VERSION = new Version('10.1.3');\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ErrorHandler, ɵɵdefineInjectable, ɵɵinject} from '@angular/core';\n\nimport {DOCUMENT} from './dom_tokens';\n\n\n\n/**\n * Defines a scroll position manager. Implemented by `BrowserViewportScroller`.\n *\n * @publicApi\n */\nexport abstract class ViewportScroller {\n  // De-sugared tree-shakable injection\n  // See #23917\n  /** @nocollapse */\n  static ɵprov = ɵɵdefineInjectable({\n    token: ViewportScroller,\n    providedIn: 'root',\n    factory: () => new BrowserViewportScroller(ɵɵinject(DOCUMENT), window, ɵɵinject(ErrorHandler))\n  });\n\n  /**\n   * Configures the top offset used when scrolling to an anchor.\n   * @param offset A position in screen coordinates (a tuple with x and y values)\n   * or a function that returns the top offset position.\n   *\n   */\n  abstract setOffset(offset: [number, number]|(() => [number, number])): void;\n\n  /**\n   * Retrieves the current scroll position.\n   * @returns A position in screen coordinates (a tuple with x and y values).\n   */\n  abstract getScrollPosition(): [number, number];\n\n  /**\n   * Scrolls to a specified position.\n   * @param position A position in screen coordinates (a tuple with x and y values).\n   */\n  abstract scrollToPosition(position: [number, number]): void;\n\n  /**\n   * Scrolls to an anchor element.\n   * @param anchor The ID of the anchor element.\n   */\n  abstract scrollToAnchor(anchor: string): void;\n\n  /**\n   * Disables automatic scroll restoration provided by the browser.\n   * See also [window.history.scrollRestoration\n   * info](https://developers.google.com/web/updates/2015/09/history-api-scroll-restoration).\n   */\n  abstract setHistoryScrollRestoration(scrollRestoration: 'auto'|'manual'): void;\n}\n\n/**\n * Manages the scroll position for a browser window.\n */\nexport class BrowserViewportScroller implements ViewportScroller {\n  private offset: () => [number, number] = () => [0, 0];\n\n  constructor(private document: any, private window: any, private errorHandler: ErrorHandler) {}\n\n  /**\n   * Configures the top offset used when scrolling to an anchor.\n   * @param offset A position in screen coordinates (a tuple with x and y values)\n   * or a function that returns the top offset position.\n   *\n   */\n  setOffset(offset: [number, number]|(() => [number, number])): void {\n    if (Array.isArray(offset)) {\n      this.offset = () => offset;\n    } else {\n      this.offset = offset;\n    }\n  }\n\n  /**\n   * Retrieves the current scroll position.\n   * @returns The position in screen coordinates.\n   */\n  getScrollPosition(): [number, number] {\n    if (this.supportsScrolling()) {\n      return [this.window.scrollX, this.window.scrollY];\n    } else {\n      return [0, 0];\n    }\n  }\n\n  /**\n   * Sets the scroll position.\n   * @param position The new position in screen coordinates.\n   */\n  scrollToPosition(position: [number, number]): void {\n    if (this.supportsScrolling()) {\n      this.window.scrollTo(position[0], position[1]);\n    }\n  }\n\n  /**\n   * Scrolls to an anchor element.\n   * @param anchor The ID of the anchor element.\n   */\n  scrollToAnchor(anchor: string): void {\n    if (this.supportsScrolling()) {\n      const elSelected =\n          this.document.getElementById(anchor) || this.document.getElementsByName(anchor)[0];\n      if (elSelected) {\n        this.scrollToElement(elSelected);\n      }\n    }\n  }\n\n  /**\n   * Disables automatic scroll restoration provided by the browser.\n   */\n  setHistoryScrollRestoration(scrollRestoration: 'auto'|'manual'): void {\n    if (this.supportScrollRestoration()) {\n      const history = this.window.history;\n      if (history && history.scrollRestoration) {\n        history.scrollRestoration = scrollRestoration;\n      }\n    }\n  }\n\n  private scrollToElement(el: any): void {\n    const rect = el.getBoundingClientRect();\n    const left = rect.left + this.window.pageXOffset;\n    const top = rect.top + this.window.pageYOffset;\n    const offset = this.offset();\n    this.window.scrollTo(left - offset[0], top - offset[1]);\n  }\n\n  /**\n   * We only support scroll restoration when we can get a hold of window.\n   * This means that we do not support this behavior when running in a web worker.\n   *\n   * Lifting this restriction right now would require more changes in the dom adapter.\n   * Since webworkers aren't widely used, we will lift it once RouterScroller is\n   * battle-tested.\n   */\n  private supportScrollRestoration(): boolean {\n    try {\n      if (!this.window || !this.window.scrollTo) {\n        return false;\n      }\n      // The `scrollRestoration` property could be on the `history` instance or its prototype.\n      const scrollRestorationDescriptor = getScrollRestorationProperty(this.window.history) ||\n          getScrollRestorationProperty(Object.getPrototypeOf(this.window.history));\n      // We can write to the `scrollRestoration` property if it is a writable data field or it has a\n      // setter function.\n      return !!scrollRestorationDescriptor &&\n          !!(scrollRestorationDescriptor.writable || scrollRestorationDescriptor.set);\n    } catch {\n      return false;\n    }\n  }\n\n  private supportsScrolling(): boolean {\n    try {\n      return !!this.window.scrollTo;\n    } catch {\n      return false;\n    }\n  }\n}\n\nfunction getScrollRestorationProperty(obj: any): PropertyDescriptor|undefined {\n  return Object.getOwnPropertyDescriptor(obj, 'scrollRestoration');\n}\n\n/**\n * Provides an empty implementation of the viewport scroller. This will\n * live in @angular/common as it will be used by both platform-server and platform-webworker.\n */\nexport class NullViewportScroller implements ViewportScroller {\n  /**\n   * Empty implementation\n   */\n  setOffset(offset: [number, number]|(() => [number, number])): void {}\n\n  /**\n   * Empty implementation\n   */\n  getScrollPosition(): [number, number] {\n    return [0, 0];\n  }\n\n  /**\n   * Empty implementation\n   */\n  scrollToPosition(position: [number, number]): void {}\n\n  /**\n   * Empty implementation\n   */\n  scrollToAnchor(anchor: string): void {}\n\n  /**\n   * Empty implementation\n   */\n  setHistoryScrollRestoration(scrollRestoration: 'auto'|'manual'): void {}\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @module\n * @description\n * Entry point for all public APIs of the common package.\n */\nexport * from './private_export';\nexport * from './location/index';\nexport {formatDate} from './i18n/format_date';\nexport {formatCurrency, formatNumber, formatPercent} from './i18n/format_number';\nexport {NgLocaleLocalization, NgLocalization} from './i18n/localization';\nexport {registerLocaleData} from './i18n/locale_data';\nexport {Plural, NumberFormatStyle, FormStyle, Time, TranslationWidth, FormatWidth, NumberSymbol, WeekDay, getNumberOfCurrencyDigits, getCurrencySymbol, getLocaleDayPeriods, getLocaleDayNames, getLocaleMonthNames, getLocaleId, getLocaleEraNames, getLocaleWeekEndRange, getLocaleFirstDayOfWeek, getLocaleDateFormat, getLocaleDateTimeFormat, getLocaleExtraDayPeriodRules, getLocaleExtraDayPeriods, getLocalePluralCase, getLocaleTimeFormat, getLocaleNumberSymbol, getLocaleNumberFormat, getLocaleCurrencyCode, getLocaleCurrencyName, getLocaleCurrencySymbol, getLocaleDirection} from './i18n/locale_data_api';\nexport {parseCookieValue as ɵparseCookieValue} from './cookie';\nexport {CommonModule} from './common_module';\nexport {NgClass, NgForOf, NgForOfContext, NgIf, NgIfContext, NgPlural, NgPluralCase, NgStyle, NgSwitch, NgSwitchCase, NgSwitchDefault, NgTemplateOutlet, NgComponentOutlet} from './directives/index';\nexport {DOCUMENT} from './dom_tokens';\nexport {AsyncPipe, DatePipe, I18nPluralPipe, I18nSelectPipe, JsonPipe, LowerCasePipe, CurrencyPipe, DecimalPipe, PercentPipe, SlicePipe, UpperCasePipe, TitleCasePipe, KeyValuePipe, KeyValue} from './pipes/index';\nexport {PLATFORM_BROWSER_ID as ɵPLATFORM_BROWSER_ID, PLATFORM_SERVER_ID as ɵPLATFORM_SERVER_ID, PLATFORM_WORKER_APP_ID as ɵPLATFORM_WORKER_APP_ID, PLATFORM_WORKER_UI_ID as ɵPLATFORM_WORKER_UI_ID, isPlatformBrowser, isPlatformServer, isPlatformWorkerApp, isPlatformWorkerUi} from './platform_id';\nexport {VERSION} from './version';\nexport {ViewportScroller, NullViewportScroller as ɵNullViewportScroller} from './viewport_scroller';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @module\n * @description\n * Entry point for all public APIs of this package.\n */\nexport * from './src/common';\n\n// This file only reexports content of the `src` folder. Keep it that way.\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n// This file is not used to build this module. It is only used during editing\n// by the TypeScript language service and during build for verification. `ngc`\n// replaces this file with production index.ts when it rewrites private symbol\n// names.\n\nexport * from './public_api';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './index';\n\nexport {COMMON_DIRECTIVES as ɵangular_packages_common_common_e} from './src/directives/index';\nexport {createLocation as ɵangular_packages_common_common_c} from './src/location/location';\nexport {provideLocationStrategy as ɵangular_packages_common_common_d} from './src/location/location_strategy';\nexport {createBrowserPlatformLocation as ɵangular_packages_common_common_b,useBrowserPlatformLocation as ɵangular_packages_common_common_a} from './src/location/platform_location';\nexport {COMMON_PIPES as ɵangular_packages_common_common_f} from './src/pipes/index';","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar zipAll_1 = require(\"../../operator/zipAll\");\nrxjs_1.Observable.prototype.zipAll = zipAll_1.zipAll;\n//# sourceMappingURL=zipAll.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.range = rxjs_1.range;\n//# sourceMappingURL=range.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar switch_1 = require(\"../../operator/switch\");\nrxjs_1.Observable.prototype.switch = switch_1._switch;\nrxjs_1.Observable.prototype._switch = switch_1._switch;\n//# sourceMappingURL=switch.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar takeUntil_1 = require(\"../../operator/takeUntil\");\nrxjs_1.Observable.prototype.takeUntil = takeUntil_1.takeUntil;\n//# sourceMappingURL=takeUntil.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\n/* tslint:enable:max-line-length */\n/**\n * Creates an output Observable which sequentially emits all values from every\n * given input Observable after the current Observable.\n *\n * <span class=\"informal\">Concatenates multiple Observables together by\n * sequentially emitting their values, one Observable after the other.</span>\n *\n * <img src=\"./img/concat.png\" width=\"100%\">\n *\n * Joins this Observable with multiple other Observables by subscribing to them\n * one at a time, starting with the source, and merging their results into the\n * output Observable. Will wait for each Observable to complete before moving\n * on to the next.\n *\n * @example <caption>Concatenate a timer counting from 0 to 3 with a synchronous sequence from 1 to 10</caption>\n * var timer = Rx.Observable.interval(1000).take(4);\n * var sequence = Rx.Observable.range(1, 10);\n * var result = timer.concat(sequence);\n * result.subscribe(x => console.log(x));\n *\n * // results in:\n * // 1000ms-> 0 -1000ms-> 1 -1000ms-> 2 -1000ms-> 3 -immediate-> 1 ... 10\n *\n * @example <caption>Concatenate 3 Observables</caption>\n * var timer1 = Rx.Observable.interval(1000).take(10);\n * var timer2 = Rx.Observable.interval(2000).take(6);\n * var timer3 = Rx.Observable.interval(500).take(10);\n * var result = timer1.concat(timer2, timer3);\n * result.subscribe(x => console.log(x));\n *\n * // results in the following:\n * // (Prints to console sequentially)\n * // -1000ms-> 0 -1000ms-> 1 -1000ms-> ... 9\n * // -2000ms-> 0 -2000ms-> 1 -2000ms-> ... 5\n * // -500ms-> 0 -500ms-> 1 -500ms-> ... 9\n *\n * @see {@link concatAll}\n * @see {@link concatMap}\n * @see {@link concatMapTo}\n *\n * @param {ObservableInput} other An input Observable to concatenate after the source\n * Observable. More than one input Observables may be given as argument.\n * @param {Scheduler} [scheduler=null] An optional IScheduler to schedule each\n * Observable subscription on.\n * @return {Observable} All values of each passed Observable merged into a\n * single Observable, in order, in serial fashion.\n * @method concat\n * @owner Observable\n */\nfunction concat() {\n    var observables = [];\n    for (var _i = 0; _i < arguments.length; _i++) {\n        observables[_i] = arguments[_i];\n    }\n    return this.lift.call(rxjs_1.concat.apply(void 0, [this].concat(observables)));\n}\nexports.concat = concat;\n//# sourceMappingURL=concat.js.map","import { SimpleOuterSubscriber, innerSubscribe, SimpleInnerSubscriber } from '../innerSubscribe';\nexport function buffer(closingNotifier) {\n    return function bufferOperatorFunction(source) {\n        return source.lift(new BufferOperator(closingNotifier));\n    };\n}\nclass BufferOperator {\n    constructor(closingNotifier) {\n        this.closingNotifier = closingNotifier;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new BufferSubscriber(subscriber, this.closingNotifier));\n    }\n}\nclass BufferSubscriber extends SimpleOuterSubscriber {\n    constructor(destination, closingNotifier) {\n        super(destination);\n        this.buffer = [];\n        this.add(innerSubscribe(closingNotifier, new SimpleInnerSubscriber(this)));\n    }\n    _next(value) {\n        this.buffer.push(value);\n    }\n    notifyNext() {\n        const buffer = this.buffer;\n        this.buffer = [];\n        this.destination.next(buffer);\n    }\n}\n//# sourceMappingURL=buffer.js.map","import { Subscriber } from '../Subscriber';\nexport function filter(predicate, thisArg) {\n    return function filterOperatorFunction(source) {\n        return source.lift(new FilterOperator(predicate, thisArg));\n    };\n}\nclass FilterOperator {\n    constructor(predicate, thisArg) {\n        this.predicate = predicate;\n        this.thisArg = thisArg;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new FilterSubscriber(subscriber, this.predicate, this.thisArg));\n    }\n}\nclass FilterSubscriber extends Subscriber {\n    constructor(destination, predicate, thisArg) {\n        super(destination);\n        this.predicate = predicate;\n        this.thisArg = thisArg;\n        this.count = 0;\n    }\n    _next(value) {\n        let result;\n        try {\n            result = this.predicate.call(this.thisArg, value, this.count++);\n        }\n        catch (err) {\n            this.destination.error(err);\n            return;\n        }\n        if (result) {\n            this.destination.next(value);\n        }\n    }\n}\n//# sourceMappingURL=filter.js.map","import { iterator as Symbol_iterator } from '../symbol/iterator';\nexport const subscribeToIterable = (iterable) => (subscriber) => {\n    const iterator = iterable[Symbol_iterator]();\n    do {\n        let item;\n        try {\n            item = iterator.next();\n        }\n        catch (err) {\n            subscriber.error(err);\n            return subscriber;\n        }\n        if (item.done) {\n            subscriber.complete();\n            break;\n        }\n        subscriber.next(item.value);\n        if (subscriber.closed) {\n            break;\n        }\n    } while (true);\n    if (typeof iterator.return === 'function') {\n        subscriber.add(() => {\n            if (iterator.return) {\n                iterator.return();\n            }\n        });\n    }\n    return subscriber;\n};\n//# sourceMappingURL=subscribeToIterable.js.map","import { Subject } from '../Subject';\nimport { OuterSubscriber } from '../OuterSubscriber';\nimport { subscribeToResult } from '../util/subscribeToResult';\nexport function windowWhen(closingSelector) {\n    return function windowWhenOperatorFunction(source) {\n        return source.lift(new WindowOperator(closingSelector));\n    };\n}\nclass WindowOperator {\n    constructor(closingSelector) {\n        this.closingSelector = closingSelector;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new WindowSubscriber(subscriber, this.closingSelector));\n    }\n}\nclass WindowSubscriber extends OuterSubscriber {\n    constructor(destination, closingSelector) {\n        super(destination);\n        this.destination = destination;\n        this.closingSelector = closingSelector;\n        this.openWindow();\n    }\n    notifyNext(_outerValue, _innerValue, _outerIndex, _innerIndex, innerSub) {\n        this.openWindow(innerSub);\n    }\n    notifyError(error) {\n        this._error(error);\n    }\n    notifyComplete(innerSub) {\n        this.openWindow(innerSub);\n    }\n    _next(value) {\n        this.window.next(value);\n    }\n    _error(err) {\n        this.window.error(err);\n        this.destination.error(err);\n        this.unsubscribeClosingNotification();\n    }\n    _complete() {\n        this.window.complete();\n        this.destination.complete();\n        this.unsubscribeClosingNotification();\n    }\n    unsubscribeClosingNotification() {\n        if (this.closingNotification) {\n            this.closingNotification.unsubscribe();\n        }\n    }\n    openWindow(innerSub = null) {\n        if (innerSub) {\n            this.remove(innerSub);\n            innerSub.unsubscribe();\n        }\n        const prevWindow = this.window;\n        if (prevWindow) {\n            prevWindow.complete();\n        }\n        const window = this.window = new Subject();\n        this.destination.next(window);\n        let closingNotifier;\n        try {\n            const { closingSelector } = this;\n            closingNotifier = closingSelector();\n        }\n        catch (e) {\n            this.destination.error(e);\n            this.window.error(e);\n            return;\n        }\n        this.add(this.closingNotification = subscribeToResult(this, closingNotifier));\n    }\n}\n//# sourceMappingURL=windowWhen.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar skip_1 = require(\"../../operator/skip\");\nrxjs_1.Observable.prototype.skip = skip_1.skip;\n//# sourceMappingURL=skip.js.map","const UnsubscriptionErrorImpl = (() => {\n    function UnsubscriptionErrorImpl(errors) {\n        Error.call(this);\n        this.message = errors ?\n            `${errors.length} errors occurred during unsubscription:\n${errors.map((err, i) => `${i + 1}) ${err.toString()}`).join('\\n  ')}` : '';\n        this.name = 'UnsubscriptionError';\n        this.errors = errors;\n        return this;\n    }\n    UnsubscriptionErrorImpl.prototype = Object.create(Error.prototype);\n    return UnsubscriptionErrorImpl;\n})();\nexport const UnsubscriptionError = UnsubscriptionErrorImpl;\n//# sourceMappingURL=UnsubscriptionError.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Converts a higher-order Observable into a first-order Observable by\n * subscribing to only the most recently emitted of those inner Observables.\n *\n * <span class=\"informal\">Flattens an Observable-of-Observables by dropping the\n * previous inner Observable once a new one appears.</span>\n *\n * <img src=\"./img/switch.png\" width=\"100%\">\n *\n * `switch` subscribes to an Observable that emits Observables, also known as a\n * higher-order Observable. Each time it observes one of these emitted inner\n * Observables, the output Observable subscribes to the inner Observable and\n * begins emitting the items emitted by that. So far, it behaves\n * like {@link mergeAll}. However, when a new inner Observable is emitted,\n * `switch` unsubscribes from the earlier-emitted inner Observable and\n * subscribes to the new inner Observable and begins emitting items from it. It\n * continues to behave like this for subsequent inner Observables.\n *\n * @example <caption>Rerun an interval Observable on every click event</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * // Each click event is mapped to an Observable that ticks every second\n * var higherOrder = clicks.map((ev) => Rx.Observable.interval(1000));\n * var switched = higherOrder.switch();\n * // The outcome is that `switched` is essentially a timer that restarts\n * // on every click. The interval Observables from older clicks do not merge\n * // with the current interval Observable.\n * switched.subscribe(x => console.log(x));\n *\n * @see {@link combineAll}\n * @see {@link concatAll}\n * @see {@link exhaust}\n * @see {@link mergeAll}\n * @see {@link switchMap}\n * @see {@link switchMapTo}\n * @see {@link zipAll}\n *\n * @return {Observable<T>} An Observable that emits the items emitted by the\n * Observable most recently emitted by the source Observable.\n * @method switch\n * @name switch\n * @owner Observable\n */\nfunction _switch() {\n    return operators_1.switchAll()(this);\n}\nexports._switch = _switch;\n//# sourceMappingURL=switch.js.map","import { Subscriber } from '../Subscriber';\nimport { Notification } from '../Notification';\nexport function observeOn(scheduler, delay = 0) {\n    return function observeOnOperatorFunction(source) {\n        return source.lift(new ObserveOnOperator(scheduler, delay));\n    };\n}\nexport class ObserveOnOperator {\n    constructor(scheduler, delay = 0) {\n        this.scheduler = scheduler;\n        this.delay = delay;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new ObserveOnSubscriber(subscriber, this.scheduler, this.delay));\n    }\n}\nexport class ObserveOnSubscriber extends Subscriber {\n    constructor(destination, scheduler, delay = 0) {\n        super(destination);\n        this.scheduler = scheduler;\n        this.delay = delay;\n    }\n    static dispatch(arg) {\n        const { notification, destination } = arg;\n        notification.observe(destination);\n        this.unsubscribe();\n    }\n    scheduleMessage(notification) {\n        const destination = this.destination;\n        destination.add(this.scheduler.schedule(ObserveOnSubscriber.dispatch, this.delay, new ObserveOnMessage(notification, this.destination)));\n    }\n    _next(value) {\n        this.scheduleMessage(Notification.createNext(value));\n    }\n    _error(err) {\n        this.scheduleMessage(Notification.createError(err));\n        this.unsubscribe();\n    }\n    _complete() {\n        this.scheduleMessage(Notification.createComplete());\n        this.unsubscribe();\n    }\n}\nexport class ObserveOnMessage {\n    constructor(notification, destination) {\n        this.notification = notification;\n        this.destination = destination;\n    }\n}\n//# sourceMappingURL=observeOn.js.map","import { concatMap } from './concatMap';\nexport function concatMapTo(innerObservable, resultSelector) {\n    return concatMap(() => innerObservable, resultSelector);\n}\n//# sourceMappingURL=concatMapTo.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar elementAt_1 = require(\"../../operator/elementAt\");\nrxjs_1.Observable.prototype.elementAt = elementAt_1.elementAt;\n//# sourceMappingURL=elementAt.js.map","import { merge as mergeStatic } from '../observable/merge';\nexport function merge(...observables) {\n    return (source) => source.lift.call(mergeStatic(source, ...observables));\n}\n//# sourceMappingURL=merge.js.map","export { Observable } from './internal/Observable';\nexport { ConnectableObservable } from './internal/observable/ConnectableObservable';\nexport { GroupedObservable } from './internal/operators/groupBy';\nexport { observable } from './internal/symbol/observable';\nexport { Subject } from './internal/Subject';\nexport { BehaviorSubject } from './internal/BehaviorSubject';\nexport { ReplaySubject } from './internal/ReplaySubject';\nexport { AsyncSubject } from './internal/AsyncSubject';\nexport { asap, asapScheduler } from './internal/scheduler/asap';\nexport { async, asyncScheduler } from './internal/scheduler/async';\nexport { queue, queueScheduler } from './internal/scheduler/queue';\nexport { animationFrame, animationFrameScheduler } from './internal/scheduler/animationFrame';\nexport { VirtualTimeScheduler, VirtualAction } from './internal/scheduler/VirtualTimeScheduler';\nexport { Scheduler } from './internal/Scheduler';\nexport { Subscription } from './internal/Subscription';\nexport { Subscriber } from './internal/Subscriber';\nexport { Notification, NotificationKind } from './internal/Notification';\nexport { pipe } from './internal/util/pipe';\nexport { noop } from './internal/util/noop';\nexport { identity } from './internal/util/identity';\nexport { isObservable } from './internal/util/isObservable';\nexport { ArgumentOutOfRangeError } from './internal/util/ArgumentOutOfRangeError';\nexport { EmptyError } from './internal/util/EmptyError';\nexport { ObjectUnsubscribedError } from './internal/util/ObjectUnsubscribedError';\nexport { UnsubscriptionError } from './internal/util/UnsubscriptionError';\nexport { TimeoutError } from './internal/util/TimeoutError';\nexport { bindCallback } from './internal/observable/bindCallback';\nexport { bindNodeCallback } from './internal/observable/bindNodeCallback';\nexport { combineLatest } from './internal/observable/combineLatest';\nexport { concat } from './internal/observable/concat';\nexport { defer } from './internal/observable/defer';\nexport { empty } from './internal/observable/empty';\nexport { forkJoin } from './internal/observable/forkJoin';\nexport { from } from './internal/observable/from';\nexport { fromEvent } from './internal/observable/fromEvent';\nexport { fromEventPattern } from './internal/observable/fromEventPattern';\nexport { generate } from './internal/observable/generate';\nexport { iif } from './internal/observable/iif';\nexport { interval } from './internal/observable/interval';\nexport { merge } from './internal/observable/merge';\nexport { never } from './internal/observable/never';\nexport { of } from './internal/observable/of';\nexport { onErrorResumeNext } from './internal/observable/onErrorResumeNext';\nexport { pairs } from './internal/observable/pairs';\nexport { partition } from './internal/observable/partition';\nexport { race } from './internal/observable/race';\nexport { range } from './internal/observable/range';\nexport { throwError } from './internal/observable/throwError';\nexport { timer } from './internal/observable/timer';\nexport { using } from './internal/observable/using';\nexport { zip } from './internal/observable/zip';\nexport { scheduled } from './internal/scheduled/scheduled';\nexport { EMPTY } from './internal/observable/empty';\nexport { NEVER } from './internal/observable/never';\nexport { config } from './internal/config';\n//# sourceMappingURL=index.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {CdkTextareaAutosize} from '@angular/cdk/text-field';\nimport {Directive, Input} from '@angular/core';\n\n/**\n * Directive to automatically resize a textarea to fit its content.\n * @deprecated Use `cdkTextareaAutosize` from `@angular/cdk/text-field` instead.\n * @breaking-change 8.0.0\n */\n@Directive({\n  selector: 'textarea[mat-autosize], textarea[matTextareaAutosize]',\n  exportAs: 'matTextareaAutosize',\n  inputs: ['cdkAutosizeMinRows', 'cdkAutosizeMaxRows'],\n  host: {\n    'class': 'cdk-textarea-autosize mat-autosize',\n    // Textarea elements that have the directive applied should have a single row by default.\n    // Browsers normally show two rows by default and therefore this limits the minRows binding.\n    'rows': '1',\n  },\n})\nexport class MatTextareaAutosize extends CdkTextareaAutosize {\n  @Input()\n  get matAutosizeMinRows(): number { return this.minRows; }\n  set matAutosizeMinRows(value: number) { this.minRows = value; }\n\n  @Input()\n  get matAutosizeMaxRows(): number { return this.maxRows; }\n  set matAutosizeMaxRows(value: number) { this.maxRows = value; }\n\n  @Input('mat-autosize')\n  get matAutosize(): boolean { return this.enabled; }\n  set matAutosize(value: boolean) { this.enabled = value; }\n\n  @Input()\n  get matTextareaAutosize(): boolean { return this.enabled; }\n  set matTextareaAutosize(value: boolean) { this.enabled = value; }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/** @docs-private */\nexport function getMatInputUnsupportedTypeError(type: string): Error {\n  return Error(`Input type \"${type}\" isn't supported by matInput.`);\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {InjectionToken} from '@angular/core';\n\n\n/**\n * This token is used to inject the object whose value should be set into `MatInput`. If none is\n * provided, the native `HTMLInputElement` is used. Directives like `MatDatepickerInput` can provide\n * themselves for this token, in order to make `MatInput` delegate the getting and setting of the\n * value to them.\n */\nexport const MAT_INPUT_VALUE_ACCESSOR =\n    new InjectionToken<{value: any}>('MAT_INPUT_VALUE_ACCESSOR');\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {getSupportedInputTypes, Platform} from '@angular/cdk/platform';\nimport {AutofillMonitor} from '@angular/cdk/text-field';\nimport {\n  AfterViewInit,\n  Directive,\n  DoCheck,\n  ElementRef,\n  HostListener,\n  Inject,\n  Input,\n  NgZone,\n  OnChanges,\n  OnDestroy,\n  Optional,\n  Self,\n} from '@angular/core';\nimport {FormGroupDirective, NgControl, NgForm} from '@angular/forms';\nimport {\n  CanUpdateErrorState,\n  CanUpdateErrorStateCtor,\n  ErrorStateMatcher,\n  mixinErrorState,\n} from '@angular/material/core';\nimport {MatFormFieldControl, MatFormField, MAT_FORM_FIELD} from '@angular/material/form-field';\nimport {Subject} from 'rxjs';\nimport {getMatInputUnsupportedTypeError} from './input-errors';\nimport {MAT_INPUT_VALUE_ACCESSOR} from './input-value-accessor';\n\n\n// Invalid input type. Using one of these will throw an MatInputUnsupportedTypeError.\nconst MAT_INPUT_INVALID_TYPES = [\n  'button',\n  'checkbox',\n  'file',\n  'hidden',\n  'image',\n  'radio',\n  'range',\n  'reset',\n  'submit'\n];\n\nlet nextUniqueId = 0;\n\n// Boilerplate for applying mixins to MatInput.\n/** @docs-private */\nclass MatInputBase {\n  constructor(public _defaultErrorStateMatcher: ErrorStateMatcher,\n              public _parentForm: NgForm,\n              public _parentFormGroup: FormGroupDirective,\n              /** @docs-private */\n              public ngControl: NgControl) {}\n}\nconst _MatInputMixinBase: CanUpdateErrorStateCtor & typeof MatInputBase =\n    mixinErrorState(MatInputBase);\n\n/** Directive that allows a native input to work inside a `MatFormField`. */\n@Directive({\n  selector: `input[matInput], textarea[matInput], select[matNativeControl],\n      input[matNativeControl], textarea[matNativeControl]`,\n  exportAs: 'matInput',\n  host: {\n    /**\n     * @breaking-change 8.0.0 remove .mat-form-field-autofill-control in favor of AutofillMonitor.\n     */\n    'class': 'mat-input-element mat-form-field-autofill-control',\n    '[class.mat-input-server]': '_isServer',\n    // Native input properties that are overwritten by Angular inputs need to be synced with\n    // the native input element. Otherwise property bindings for those don't work.\n    '[attr.id]': 'id',\n    // At the time of writing, we have a lot of customer tests that look up the input based on its\n    // placeholder. Since we sometimes omit the placeholder attribute from the DOM to prevent screen\n    // readers from reading it twice, we have to keep it somewhere in the DOM for the lookup.\n    '[attr.data-placeholder]': 'placeholder',\n    '[disabled]': 'disabled',\n    '[required]': 'required',\n    '[attr.readonly]': 'readonly && !_isNativeSelect || null',\n    '[attr.aria-invalid]': 'errorState',\n    '[attr.aria-required]': 'required.toString()',\n  },\n  providers: [{provide: MatFormFieldControl, useExisting: MatInput}],\n})\nexport class MatInput extends _MatInputMixinBase implements MatFormFieldControl<any>, OnChanges,\n    OnDestroy, AfterViewInit, DoCheck, CanUpdateErrorState {\n  protected _uid = `mat-input-${nextUniqueId++}`;\n  protected _previousNativeValue: any;\n  private _inputValueAccessor: {value: any};\n  private _previousPlaceholder: string | null;\n\n  /** Whether the component is being rendered on the server. */\n  readonly _isServer: boolean;\n\n  /** Whether the component is a native html select. */\n  readonly _isNativeSelect: boolean;\n\n  /** Whether the component is a textarea. */\n  readonly _isTextarea: boolean;\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  focused: boolean = false;\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  readonly stateChanges: Subject<void> = new Subject<void>();\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  controlType: string = 'mat-input';\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  autofilled = false;\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  @Input()\n  get disabled(): boolean {\n    if (this.ngControl && this.ngControl.disabled !== null) {\n      return this.ngControl.disabled;\n    }\n    return this._disabled;\n  }\n  set disabled(value: boolean) {\n    this._disabled = coerceBooleanProperty(value);\n\n    // Browsers may not fire the blur event if the input is disabled too quickly.\n    // Reset from here to ensure that the element doesn't become stuck.\n    if (this.focused) {\n      this.focused = false;\n      this.stateChanges.next();\n    }\n  }\n  protected _disabled = false;\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  @Input()\n  get id(): string { return this._id; }\n  set id(value: string) { this._id = value || this._uid; }\n  protected _id: string;\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  @Input() placeholder: string;\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  @Input()\n  get required(): boolean { return this._required; }\n  set required(value: boolean) { this._required = coerceBooleanProperty(value); }\n  protected _required = false;\n\n  /** Input type of the element. */\n  @Input()\n  get type(): string { return this._type; }\n  set type(value: string) {\n    this._type = value || 'text';\n    this._validateType();\n\n    // When using Angular inputs, developers are no longer able to set the properties on the native\n    // input element. To ensure that bindings for `type` work, we need to sync the setter\n    // with the native property. Textarea elements don't support the type property or attribute.\n    if (!this._isTextarea && getSupportedInputTypes().has(this._type)) {\n      (this._elementRef.nativeElement as HTMLInputElement).type = this._type;\n    }\n  }\n  protected _type = 'text';\n\n  /** An object used to control when error messages are shown. */\n  @Input() errorStateMatcher: ErrorStateMatcher;\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  @Input('aria-describedby') userAriaDescribedBy: string;\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  @Input()\n  get value(): string { return this._inputValueAccessor.value; }\n  set value(value: string) {\n    if (value !== this.value) {\n      this._inputValueAccessor.value = value;\n      this.stateChanges.next();\n    }\n  }\n\n  /** Whether the element is readonly. */\n  @Input()\n  get readonly(): boolean { return this._readonly; }\n  set readonly(value: boolean) { this._readonly = coerceBooleanProperty(value); }\n  private _readonly = false;\n\n  protected _neverEmptyInputTypes = [\n    'date',\n    'datetime',\n    'datetime-local',\n    'month',\n    'time',\n    'week'\n  ].filter(t => getSupportedInputTypes().has(t));\n\n  constructor(\n      protected _elementRef: ElementRef<HTMLInputElement | HTMLSelectElement | HTMLTextAreaElement>,\n      protected _platform: Platform,\n      /** @docs-private */\n      @Optional() @Self() public ngControl: NgControl,\n      @Optional() _parentForm: NgForm,\n      @Optional() _parentFormGroup: FormGroupDirective,\n      _defaultErrorStateMatcher: ErrorStateMatcher,\n      @Optional() @Self() @Inject(MAT_INPUT_VALUE_ACCESSOR) inputValueAccessor: any,\n      private _autofillMonitor: AutofillMonitor,\n      ngZone: NgZone,\n      // TODO: Remove this once the legacy appearance has been removed. We only need\n      // to inject the form-field for determining whether the placeholder has been promoted.\n      @Optional() @Inject(MAT_FORM_FIELD) private _formField?: MatFormField) {\n\n    super(_defaultErrorStateMatcher, _parentForm, _parentFormGroup, ngControl);\n\n    const element = this._elementRef.nativeElement;\n    const nodeName = element.nodeName.toLowerCase();\n\n    // If no input value accessor was explicitly specified, use the element as the input value\n    // accessor.\n    this._inputValueAccessor = inputValueAccessor || element;\n\n    this._previousNativeValue = this.value;\n\n    // Force setter to be called in case id was not specified.\n    this.id = this.id;\n\n    // On some versions of iOS the caret gets stuck in the wrong place when holding down the delete\n    // key. In order to get around this we need to \"jiggle\" the caret loose. Since this bug only\n    // exists on iOS, we only bother to install the listener on iOS.\n    if (_platform.IOS) {\n      ngZone.runOutsideAngular(() => {\n        _elementRef.nativeElement.addEventListener('keyup', (event: Event) => {\n          let el = event.target as HTMLInputElement;\n          if (!el.value && !el.selectionStart && !el.selectionEnd) {\n            // Note: Just setting `0, 0` doesn't fix the issue. Setting\n            // `1, 1` fixes it for the first time that you type text and\n            // then hold delete. Toggling to `1, 1` and then back to\n            // `0, 0` seems to completely fix it.\n            el.setSelectionRange(1, 1);\n            el.setSelectionRange(0, 0);\n          }\n        });\n      });\n    }\n\n    this._isServer = !this._platform.isBrowser;\n    this._isNativeSelect = nodeName === 'select';\n    this._isTextarea = nodeName === 'textarea';\n\n    if (this._isNativeSelect) {\n      this.controlType = (element as HTMLSelectElement).multiple ? 'mat-native-select-multiple' :\n                                                                   'mat-native-select';\n    }\n  }\n\n  ngAfterViewInit() {\n    if (this._platform.isBrowser) {\n      this._autofillMonitor.monitor(this._elementRef.nativeElement).subscribe(event => {\n        this.autofilled = event.isAutofilled;\n        this.stateChanges.next();\n      });\n    }\n  }\n\n  ngOnChanges() {\n    this.stateChanges.next();\n  }\n\n  ngOnDestroy() {\n    this.stateChanges.complete();\n\n    if (this._platform.isBrowser) {\n      this._autofillMonitor.stopMonitoring(this._elementRef.nativeElement);\n    }\n  }\n\n  ngDoCheck() {\n    if (this.ngControl) {\n      // We need to re-evaluate this on every change detection cycle, because there are some\n      // error triggers that we can't subscribe to (e.g. parent form submissions). This means\n      // that whatever logic is in here has to be super lean or we risk destroying the performance.\n      this.updateErrorState();\n    }\n\n    // We need to dirty-check the native element's value, because there are some cases where\n    // we won't be notified when it changes (e.g. the consumer isn't using forms or they're\n    // updating the value using `emitEvent: false`).\n    this._dirtyCheckNativeValue();\n\n    // We need to dirty-check and set the placeholder attribute ourselves, because whether it's\n    // present or not depends on a query which is prone to \"changed after checked\" errors.\n    this._dirtyCheckPlaceholder();\n  }\n\n  /** Focuses the input. */\n  focus(options?: FocusOptions): void {\n    this._elementRef.nativeElement.focus(options);\n  }\n\n  // We have to use a `HostListener` here in order to support both Ivy and ViewEngine.\n  // In Ivy the `host` bindings will be merged when this class is extended, whereas in\n  // ViewEngine they're overwritten.\n  // TODO(crisbeto): we move this back into `host` once Ivy is turned on by default.\n  /** Callback for the cases where the focused state of the input changes. */\n  // tslint:disable:no-host-decorator-in-concrete\n  @HostListener('focus', ['true'])\n  @HostListener('blur', ['false'])\n  // tslint:enable:no-host-decorator-in-concrete\n  _focusChanged(isFocused: boolean) {\n    if (isFocused !== this.focused && (!this.readonly || !isFocused)) {\n      this.focused = isFocused;\n      this.stateChanges.next();\n    }\n  }\n\n  // We have to use a `HostListener` here in order to support both Ivy and ViewEngine.\n  // In Ivy the `host` bindings will be merged when this class is extended, whereas in\n  // ViewEngine they're overwritten.\n  // TODO(crisbeto): we move this back into `host` once Ivy is turned on by default.\n  // tslint:disable-next-line:no-host-decorator-in-concrete\n  @HostListener('input')\n  _onInput() {\n    // This is a noop function and is used to let Angular know whenever the value changes.\n    // Angular will run a new change detection each time the `input` event has been dispatched.\n    // It's necessary that Angular recognizes the value change, because when floatingLabel\n    // is set to false and Angular forms aren't used, the placeholder won't recognize the\n    // value changes and will not disappear.\n    // Listening to the input event wouldn't be necessary when the input is using the\n    // FormsModule or ReactiveFormsModule, because Angular forms also listens to input events.\n  }\n\n  /** Does some manual dirty checking on the native input `placeholder` attribute. */\n  private _dirtyCheckPlaceholder() {\n    // If we're hiding the native placeholder, it should also be cleared from the DOM, otherwise\n    // screen readers will read it out twice: once from the label and once from the attribute.\n    // TODO: can be removed once we get rid of the `legacy` style for the form field, because it's\n    // the only one that supports promoting the placeholder to a label.\n    const placeholder = this._formField?._hideControlPlaceholder?.() ? null : this.placeholder;\n    if (placeholder !== this._previousPlaceholder) {\n      const element = this._elementRef.nativeElement;\n      this._previousPlaceholder = placeholder;\n      placeholder ?\n          element.setAttribute('placeholder', placeholder) : element.removeAttribute('placeholder');\n    }\n  }\n\n  /** Does some manual dirty checking on the native input `value` property. */\n  protected _dirtyCheckNativeValue() {\n    const newValue = this._elementRef.nativeElement.value;\n\n    if (this._previousNativeValue !== newValue) {\n      this._previousNativeValue = newValue;\n      this.stateChanges.next();\n    }\n  }\n\n  /** Make sure the input is a supported type. */\n  protected _validateType() {\n    if (MAT_INPUT_INVALID_TYPES.indexOf(this._type) > -1 &&\n      (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw getMatInputUnsupportedTypeError(this._type);\n    }\n  }\n\n  /** Checks whether the input type is one of the types that are never empty. */\n  protected _isNeverEmpty() {\n    return this._neverEmptyInputTypes.indexOf(this._type) > -1;\n  }\n\n  /** Checks whether the input is invalid based on the native validation. */\n  protected _isBadInput() {\n    // The `validity` property won't be present on platform-server.\n    let validity = (this._elementRef.nativeElement as HTMLInputElement).validity;\n    return validity && validity.badInput;\n  }\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  get empty(): boolean {\n    return !this._isNeverEmpty() && !this._elementRef.nativeElement.value && !this._isBadInput() &&\n        !this.autofilled;\n  }\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  get shouldLabelFloat(): boolean {\n    if (this._isNativeSelect) {\n      // For a single-selection `<select>`, the label should float when the selected option has\n      // a non-empty display value. For a `<select multiple>`, the label *always* floats to avoid\n      // overlapping the label with the options.\n      const selectElement = this._elementRef.nativeElement as HTMLSelectElement;\n      const firstOption: HTMLOptionElement | undefined = selectElement.options[0];\n\n      // On most browsers the `selectedIndex` will always be 0, however on IE and Edge it'll be\n      // -1 if the `value` is set to something, that isn't in the list of options, at a later point.\n      return this.focused || selectElement.multiple || !this.empty ||\n             !!(selectElement.selectedIndex > -1 && firstOption && firstOption.label);\n    } else {\n      return this.focused || !this.empty;\n    }\n  }\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  setDescribedByIds(ids: string[]) {\n    if (ids.length) {\n      this._elementRef.nativeElement.setAttribute('aria-describedby', ids.join(' '));\n    } else {\n      this._elementRef.nativeElement.removeAttribute('aria-describedby');\n    }\n  }\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  onContainerClick() {\n    // Do not re-focus the input element if the element is already focused. Otherwise it can happen\n    // that someone clicks on a time input and the cursor resets to the \"hours\" field while the\n    // \"minutes\" field was actually clicked. See: https://github.com/angular/components/issues/12849\n    if (!this.focused) {\n      this.focus();\n    }\n  }\n\n  static ngAcceptInputType_disabled: BooleanInput;\n  static ngAcceptInputType_readonly: BooleanInput;\n  static ngAcceptInputType_required: BooleanInput;\n\n  // Accept `any` to avoid conflicts with other directives on `<input>` that may\n  // accept different types.\n  static ngAcceptInputType_value: any;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {TextFieldModule} from '@angular/cdk/text-field';\nimport {NgModule} from '@angular/core';\nimport {ErrorStateMatcher} from '@angular/material/core';\nimport {MatFormFieldModule} from '@angular/material/form-field';\nimport {MatTextareaAutosize} from './autosize';\nimport {MatInput} from './input';\n\n@NgModule({\n  declarations: [MatInput, MatTextareaAutosize],\n  imports: [\n    TextFieldModule,\n    MatFormFieldModule,\n  ],\n  exports: [\n    TextFieldModule,\n    // We re-export the `MatFormFieldModule` since `MatInput` will almost always\n    // be used together with `MatFormField`.\n    MatFormFieldModule,\n    MatInput,\n    MatTextareaAutosize,\n  ],\n  providers: [ErrorStateMatcher],\n})\nexport class MatInputModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './autosize';\nexport * from './input';\nexport * from './input-errors';\nexport * from './input-module';\nexport * from './input-value-accessor';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Groups pairs of consecutive emissions together and emits them as an array of\n * two values.\n *\n * <span class=\"informal\">Puts the current value and previous value together as\n * an array, and emits that.</span>\n *\n * <img src=\"./img/pairwise.png\" width=\"100%\">\n *\n * The Nth emission from the source Observable will cause the output Observable\n * to emit an array [(N-1)th, Nth] of the previous and the current value, as a\n * pair. For this reason, `pairwise` emits on the second and subsequent\n * emissions from the source Observable, but not on the first emission, because\n * there is no previous value in that case.\n *\n * @example <caption>On every click (starting from the second), emit the relative distance to the previous click</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var pairs = clicks.pairwise();\n * var distance = pairs.map(pair => {\n *   var x0 = pair[0].clientX;\n *   var y0 = pair[0].clientY;\n *   var x1 = pair[1].clientX;\n *   var y1 = pair[1].clientY;\n *   return Math.sqrt(Math.pow(x0 - x1, 2) + Math.pow(y0 - y1, 2));\n * });\n * distance.subscribe(x => console.log(x));\n *\n * @see {@link buffer}\n * @see {@link bufferCount}\n *\n * @return {Observable<Array<T>>} An Observable of pairs (as arrays) of\n * consecutive values from the source Observable.\n * @method pairwise\n * @owner Observable\n */\nfunction pairwise() {\n    return operators_1.pairwise()(this);\n}\nexports.pairwise = pairwise;\n//# sourceMappingURL=pairwise.js.map","import { AsyncSubject } from '../AsyncSubject';\nimport { multicast } from './multicast';\nexport function publishLast() {\n    return (source) => multicast(new AsyncSubject())(source);\n}\n//# sourceMappingURL=publishLast.js.map","import { QueueAction } from './QueueAction';\nimport { QueueScheduler } from './QueueScheduler';\nexport const queueScheduler = new QueueScheduler(QueueAction);\nexport const queue = queueScheduler;\n//# sourceMappingURL=queue.js.map","import { isArray } from './util/isArray';\nimport { isObject } from './util/isObject';\nimport { isFunction } from './util/isFunction';\nimport { UnsubscriptionError } from './util/UnsubscriptionError';\nexport class Subscription {\n    constructor(unsubscribe) {\n        this.closed = false;\n        this._parentOrParents = null;\n        this._subscriptions = null;\n        if (unsubscribe) {\n            this._ctorUnsubscribe = true;\n            this._unsubscribe = unsubscribe;\n        }\n    }\n    unsubscribe() {\n        let errors;\n        if (this.closed) {\n            return;\n        }\n        let { _parentOrParents, _ctorUnsubscribe, _unsubscribe, _subscriptions } = this;\n        this.closed = true;\n        this._parentOrParents = null;\n        this._subscriptions = null;\n        if (_parentOrParents instanceof Subscription) {\n            _parentOrParents.remove(this);\n        }\n        else if (_parentOrParents !== null) {\n            for (let index = 0; index < _parentOrParents.length; ++index) {\n                const parent = _parentOrParents[index];\n                parent.remove(this);\n            }\n        }\n        if (isFunction(_unsubscribe)) {\n            if (_ctorUnsubscribe) {\n                this._unsubscribe = undefined;\n            }\n            try {\n                _unsubscribe.call(this);\n            }\n            catch (e) {\n                errors = e instanceof UnsubscriptionError ? flattenUnsubscriptionErrors(e.errors) : [e];\n            }\n        }\n        if (isArray(_subscriptions)) {\n            let index = -1;\n            let len = _subscriptions.length;\n            while (++index < len) {\n                const sub = _subscriptions[index];\n                if (isObject(sub)) {\n                    try {\n                        sub.unsubscribe();\n                    }\n                    catch (e) {\n                        errors = errors || [];\n                        if (e instanceof UnsubscriptionError) {\n                            errors = errors.concat(flattenUnsubscriptionErrors(e.errors));\n                        }\n                        else {\n                            errors.push(e);\n                        }\n                    }\n                }\n            }\n        }\n        if (errors) {\n            throw new UnsubscriptionError(errors);\n        }\n    }\n    add(teardown) {\n        let subscription = teardown;\n        if (!teardown) {\n            return Subscription.EMPTY;\n        }\n        switch (typeof teardown) {\n            case 'function':\n                subscription = new Subscription(teardown);\n            case 'object':\n                if (subscription === this || subscription.closed || typeof subscription.unsubscribe !== 'function') {\n                    return subscription;\n                }\n                else if (this.closed) {\n                    subscription.unsubscribe();\n                    return subscription;\n                }\n                else if (!(subscription instanceof Subscription)) {\n                    const tmp = subscription;\n                    subscription = new Subscription();\n                    subscription._subscriptions = [tmp];\n                }\n                break;\n            default: {\n                throw new Error('unrecognized teardown ' + teardown + ' added to Subscription.');\n            }\n        }\n        let { _parentOrParents } = subscription;\n        if (_parentOrParents === null) {\n            subscription._parentOrParents = this;\n        }\n        else if (_parentOrParents instanceof Subscription) {\n            if (_parentOrParents === this) {\n                return subscription;\n            }\n            subscription._parentOrParents = [_parentOrParents, this];\n        }\n        else if (_parentOrParents.indexOf(this) === -1) {\n            _parentOrParents.push(this);\n        }\n        else {\n            return subscription;\n        }\n        const subscriptions = this._subscriptions;\n        if (subscriptions === null) {\n            this._subscriptions = [subscription];\n        }\n        else {\n            subscriptions.push(subscription);\n        }\n        return subscription;\n    }\n    remove(subscription) {\n        const subscriptions = this._subscriptions;\n        if (subscriptions) {\n            const subscriptionIndex = subscriptions.indexOf(subscription);\n            if (subscriptionIndex !== -1) {\n                subscriptions.splice(subscriptionIndex, 1);\n            }\n        }\n    }\n}\nSubscription.EMPTY = (function (empty) {\n    empty.closed = true;\n    return empty;\n}(new Subscription()));\nfunction flattenUnsubscriptionErrors(errors) {\n    return errors.reduce((errs, err) => errs.concat((err instanceof UnsubscriptionError) ? err.errors : err), []);\n}\n//# sourceMappingURL=Subscription.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Emits the values emitted by the source Observable until a `notifier`\n * Observable emits a value.\n *\n * <span class=\"informal\">Lets values pass until a second Observable,\n * `notifier`, emits a value. Then, it completes.</span>\n *\n * <img src=\"./img/takeUntil.png\" width=\"100%\">\n *\n * `takeUntil` subscribes and begins mirroring the source Observable. It also\n * monitors a second Observable, `notifier` that you provide. If the `notifier`\n * emits a value, the output Observable stops mirroring the source Observable\n * and completes. If the `notifier` doesn't emit any value and completes\n * then `takeUntil` will pass all values.\n *\n * @example <caption>Tick every second until the first click happens</caption>\n * var interval = Rx.Observable.interval(1000);\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = interval.takeUntil(clicks);\n * result.subscribe(x => console.log(x));\n *\n * @see {@link take}\n * @see {@link takeLast}\n * @see {@link takeWhile}\n * @see {@link skip}\n *\n * @param {Observable} notifier The Observable whose first emitted value will\n * cause the output Observable of `takeUntil` to stop emitting values from the\n * source Observable.\n * @return {Observable<T>} An Observable that emits the values from the source\n * Observable until such time as `notifier` emits its first value.\n * @method takeUntil\n * @owner Observable\n */\nfunction takeUntil(notifier) {\n    return operators_1.takeUntil(notifier)(this);\n}\nexports.takeUntil = takeUntil;\n//# sourceMappingURL=takeUntil.js.map","import { async } from '../scheduler/async';\nimport { map } from './map';\nexport function timestamp(scheduler = async) {\n    return map((value) => new Timestamp(value, scheduler.now()));\n}\nexport class Timestamp {\n    constructor(value, timestamp) {\n        this.value = value;\n        this.timestamp = timestamp;\n    }\n}\n//# sourceMappingURL=timestamp.js.map","import { defer } from './defer';\nimport { EMPTY } from './empty';\nexport function iif(condition, trueResult = EMPTY, falseResult = EMPTY) {\n    return defer(() => condition() ? trueResult : falseResult);\n}\n//# sourceMappingURL=iif.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ScrollStrategy} from './scroll-strategy';\nimport {ViewportRuler} from '@angular/cdk/scrolling';\nimport {coerceCssPixelValue} from '@angular/cdk/coercion';\n\n/**\n * Extended `CSSStyleDeclaration` that includes `scrollBehavior` which isn't part of the\n * built-in TS typings. Once it is, this declaration can be removed safely.\n * @docs-private\n */\ntype ScrollBehaviorCSSStyleDeclaration = CSSStyleDeclaration & {scrollBehavior: string};\n\n/**\n * Strategy that will prevent the user from scrolling while the overlay is visible.\n */\nexport class BlockScrollStrategy implements ScrollStrategy {\n  private _previousHTMLStyles = {top: '', left: ''};\n  private _previousScrollPosition: { top: number, left: number };\n  private _isEnabled = false;\n  private _document: Document;\n\n  constructor(private _viewportRuler: ViewportRuler, document: any) {\n    this._document = document;\n  }\n\n  /** Attaches this scroll strategy to an overlay. */\n  attach() { }\n\n  /** Blocks page-level scroll while the attached overlay is open. */\n  enable() {\n    if (this._canBeEnabled()) {\n      const root = this._document.documentElement!;\n\n      this._previousScrollPosition = this._viewportRuler.getViewportScrollPosition();\n\n      // Cache the previous inline styles in case the user had set them.\n      this._previousHTMLStyles.left = root.style.left || '';\n      this._previousHTMLStyles.top = root.style.top || '';\n\n      // Note: we're using the `html` node, instead of the `body`, because the `body` may\n      // have the user agent margin, whereas the `html` is guaranteed not to have one.\n      root.style.left = coerceCssPixelValue(-this._previousScrollPosition.left);\n      root.style.top = coerceCssPixelValue(-this._previousScrollPosition.top);\n      root.classList.add('cdk-global-scrollblock');\n      this._isEnabled = true;\n    }\n  }\n\n  /** Unblocks page-level scroll while the attached overlay is open. */\n  disable() {\n    if (this._isEnabled) {\n      const html = this._document.documentElement!;\n      const body = this._document.body!;\n      const htmlStyle = html.style as ScrollBehaviorCSSStyleDeclaration;\n      const bodyStyle = body.style as ScrollBehaviorCSSStyleDeclaration;\n      const previousHtmlScrollBehavior = htmlStyle.scrollBehavior || '';\n      const previousBodyScrollBehavior = bodyStyle.scrollBehavior || '';\n\n      this._isEnabled = false;\n\n      htmlStyle.left = this._previousHTMLStyles.left;\n      htmlStyle.top = this._previousHTMLStyles.top;\n      html.classList.remove('cdk-global-scrollblock');\n\n      // Disable user-defined smooth scrolling temporarily while we restore the scroll position.\n      // See https://developer.mozilla.org/en-US/docs/Web/CSS/scroll-behavior\n      htmlStyle.scrollBehavior = bodyStyle.scrollBehavior = 'auto';\n\n      window.scroll(this._previousScrollPosition.left, this._previousScrollPosition.top);\n\n      htmlStyle.scrollBehavior = previousHtmlScrollBehavior;\n      bodyStyle.scrollBehavior = previousBodyScrollBehavior;\n    }\n  }\n\n  private _canBeEnabled(): boolean {\n    // Since the scroll strategies can't be singletons, we have to use a global CSS class\n    // (`cdk-global-scrollblock`) to make sure that we don't try to disable global\n    // scrolling multiple times.\n    const html = this._document.documentElement!;\n\n    if (html.classList.contains('cdk-global-scrollblock') || this._isEnabled) {\n      return false;\n    }\n\n    const body = this._document.body;\n    const viewport = this._viewportRuler.getViewportSize();\n    return body.scrollHeight > viewport.height || body.scrollWidth > viewport.width;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {OverlayReference} from '../overlay-reference';\n\n/**\n * Describes a strategy that will be used by an overlay to handle scroll events while it is open.\n */\nexport interface ScrollStrategy {\n  /** Enable this scroll strategy (called when the attached overlay is attached to a portal). */\n  enable: () => void;\n\n  /** Disable this scroll strategy (called when the attached overlay is detached from a portal). */\n  disable: () => void;\n\n  /** Attaches this `ScrollStrategy` to an overlay. */\n  attach: (overlayRef: OverlayReference) => void;\n\n  /** Detaches the scroll strategy from the current overlay. */\n  detach?: () => void;\n}\n\n/**\n * Returns an error to be thrown when attempting to attach an already-attached scroll strategy.\n */\nexport function getMatScrollStrategyAlreadyAttachedError(): Error {\n  return Error(`Scroll strategy has already been attached.`);\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {NgZone} from '@angular/core';\nimport {ScrollStrategy, getMatScrollStrategyAlreadyAttachedError} from './scroll-strategy';\nimport {OverlayReference} from '../overlay-reference';\nimport {Subscription} from 'rxjs';\nimport {ScrollDispatcher, ViewportRuler} from '@angular/cdk/scrolling';\n\n/**\n * Config options for the CloseScrollStrategy.\n */\nexport interface CloseScrollStrategyConfig {\n  /** Amount of pixels the user has to scroll before the overlay is closed. */\n  threshold?: number;\n}\n\n/**\n * Strategy that will close the overlay as soon as the user starts scrolling.\n */\nexport class CloseScrollStrategy implements ScrollStrategy {\n  private _scrollSubscription: Subscription|null = null;\n  private _overlayRef: OverlayReference;\n  private _initialScrollPosition: number;\n\n  constructor(\n    private _scrollDispatcher: ScrollDispatcher,\n    private _ngZone: NgZone,\n    private _viewportRuler: ViewportRuler,\n    private _config?: CloseScrollStrategyConfig) {}\n\n  /** Attaches this scroll strategy to an overlay. */\n  attach(overlayRef: OverlayReference) {\n    if (this._overlayRef && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw getMatScrollStrategyAlreadyAttachedError();\n    }\n\n    this._overlayRef = overlayRef;\n  }\n\n  /** Enables the closing of the attached overlay on scroll. */\n  enable() {\n    if (this._scrollSubscription) {\n      return;\n    }\n\n    const stream = this._scrollDispatcher.scrolled(0);\n\n    if (this._config && this._config.threshold && this._config.threshold > 1) {\n      this._initialScrollPosition = this._viewportRuler.getViewportScrollPosition().top;\n\n      this._scrollSubscription = stream.subscribe(() => {\n        const scrollPosition = this._viewportRuler.getViewportScrollPosition().top;\n\n        if (Math.abs(scrollPosition - this._initialScrollPosition) > this._config!.threshold!) {\n          this._detach();\n        } else {\n          this._overlayRef.updatePosition();\n        }\n      });\n    } else {\n      this._scrollSubscription = stream.subscribe(this._detach);\n    }\n  }\n\n  /** Disables the closing the attached overlay on scroll. */\n  disable() {\n    if (this._scrollSubscription) {\n      this._scrollSubscription.unsubscribe();\n      this._scrollSubscription = null;\n    }\n  }\n\n  detach() {\n    this.disable();\n    this._overlayRef = null!;\n  }\n\n  /** Detaches the overlay ref and disables the scroll strategy. */\n  private _detach = () => {\n    this.disable();\n\n    if (this._overlayRef.hasAttached()) {\n      this._ngZone.run(() => this._overlayRef.detach());\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ScrollStrategy} from './scroll-strategy';\n\n/** Scroll strategy that doesn't do anything. */\nexport class NoopScrollStrategy implements ScrollStrategy {\n  /** Does nothing, as this scroll strategy is a no-op. */\n  enable() { }\n  /** Does nothing, as this scroll strategy is a no-op. */\n  disable() { }\n  /** Does nothing, as this scroll strategy is a no-op. */\n  attach() { }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n// TODO(jelbourn): move this to live with the rest of the scrolling code\n// TODO(jelbourn): someday replace this with IntersectionObservers\n\n/**\n * Gets whether an element is scrolled outside of view by any of its parent scrolling containers.\n * @param element Dimensions of the element (from getBoundingClientRect)\n * @param scrollContainers Dimensions of element's scrolling containers (from getBoundingClientRect)\n * @returns Whether the element is scrolled out of view\n * @docs-private\n */\nexport function isElementScrolledOutsideView(element: ClientRect, scrollContainers: ClientRect[]) {\n  return scrollContainers.some(containerBounds => {\n    const outsideAbove = element.bottom < containerBounds.top;\n    const outsideBelow = element.top > containerBounds.bottom;\n    const outsideLeft = element.right < containerBounds.left;\n    const outsideRight = element.left > containerBounds.right;\n\n    return outsideAbove || outsideBelow || outsideLeft || outsideRight;\n  });\n}\n\n\n/**\n * Gets whether an element is clipped by any of its scrolling containers.\n * @param element Dimensions of the element (from getBoundingClientRect)\n * @param scrollContainers Dimensions of element's scrolling containers (from getBoundingClientRect)\n * @returns Whether the element is clipped\n * @docs-private\n */\nexport function isElementClippedByScrolling(element: ClientRect, scrollContainers: ClientRect[]) {\n  return scrollContainers.some(scrollContainerRect => {\n    const clippedAbove = element.top < scrollContainerRect.top;\n    const clippedBelow = element.bottom > scrollContainerRect.bottom;\n    const clippedLeft = element.left < scrollContainerRect.left;\n    const clippedRight = element.right > scrollContainerRect.right;\n\n    return clippedAbove || clippedBelow || clippedLeft || clippedRight;\n  });\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgZone} from '@angular/core';\nimport {Subscription} from 'rxjs';\nimport {ScrollStrategy, getMatScrollStrategyAlreadyAttachedError} from './scroll-strategy';\nimport {OverlayReference} from '../overlay-reference';\nimport {ScrollDispatcher, ViewportRuler} from '@angular/cdk/scrolling';\nimport {isElementScrolledOutsideView} from '../position/scroll-clip';\n\n/**\n * Config options for the RepositionScrollStrategy.\n */\nexport interface RepositionScrollStrategyConfig {\n  /** Time in milliseconds to throttle the scroll events. */\n  scrollThrottle?: number;\n\n  /** Whether to close the overlay once the user has scrolled away completely. */\n  autoClose?: boolean;\n}\n\n/**\n * Strategy that will update the element position as the user is scrolling.\n */\nexport class RepositionScrollStrategy implements ScrollStrategy {\n  private _scrollSubscription: Subscription|null = null;\n  private _overlayRef: OverlayReference;\n\n  constructor(\n    private _scrollDispatcher: ScrollDispatcher,\n    private _viewportRuler: ViewportRuler,\n    private _ngZone: NgZone,\n    private _config?: RepositionScrollStrategyConfig) { }\n\n  /** Attaches this scroll strategy to an overlay. */\n  attach(overlayRef: OverlayReference) {\n    if (this._overlayRef && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw getMatScrollStrategyAlreadyAttachedError();\n    }\n\n    this._overlayRef = overlayRef;\n  }\n\n  /** Enables repositioning of the attached overlay on scroll. */\n  enable() {\n    if (!this._scrollSubscription) {\n      const throttle = this._config ? this._config.scrollThrottle : 0;\n\n      this._scrollSubscription = this._scrollDispatcher.scrolled(throttle).subscribe(() => {\n        this._overlayRef.updatePosition();\n\n        // TODO(crisbeto): make `close` on by default once all components can handle it.\n        if (this._config && this._config.autoClose) {\n          const overlayRect = this._overlayRef.overlayElement.getBoundingClientRect();\n          const {width, height} = this._viewportRuler.getViewportSize();\n\n          // TODO(crisbeto): include all ancestor scroll containers here once\n          // we have a way of exposing the trigger element to the scroll strategy.\n          const parentRects = [{width, height, bottom: height, right: width, top: 0, left: 0}];\n\n          if (isElementScrolledOutsideView(overlayRect, parentRects)) {\n            this.disable();\n            this._ngZone.run(() => this._overlayRef.detach());\n          }\n        }\n      });\n    }\n  }\n\n  /** Disables repositioning of the attached overlay on scroll. */\n  disable() {\n    if (this._scrollSubscription) {\n      this._scrollSubscription.unsubscribe();\n      this._scrollSubscription = null;\n    }\n  }\n\n  detach() {\n    this.disable();\n    this._overlayRef = null!;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ScrollDispatcher, ViewportRuler} from '@angular/cdk/scrolling';\nimport {DOCUMENT} from '@angular/common';\nimport {Inject, Injectable, NgZone} from '@angular/core';\nimport {BlockScrollStrategy} from './block-scroll-strategy';\nimport {CloseScrollStrategy, CloseScrollStrategyConfig} from './close-scroll-strategy';\nimport {NoopScrollStrategy} from './noop-scroll-strategy';\nimport {\n  RepositionScrollStrategy,\n  RepositionScrollStrategyConfig,\n} from './reposition-scroll-strategy';\n\n\n/**\n * Options for how an overlay will handle scrolling.\n *\n * Users can provide a custom value for `ScrollStrategyOptions` to replace the default\n * behaviors. This class primarily acts as a factory for ScrollStrategy instances.\n */\n@Injectable({providedIn: 'root'})\nexport class ScrollStrategyOptions {\n  private _document: Document;\n\n  constructor(\n    private _scrollDispatcher: ScrollDispatcher,\n    private _viewportRuler: ViewportRuler,\n    private _ngZone: NgZone,\n    @Inject(DOCUMENT) document: any) {\n      this._document = document;\n    }\n\n  /** Do nothing on scroll. */\n  noop = () => new NoopScrollStrategy();\n\n  /**\n   * Close the overlay as soon as the user scrolls.\n   * @param config Configuration to be used inside the scroll strategy.\n   */\n  close = (config?: CloseScrollStrategyConfig) => new CloseScrollStrategy(this._scrollDispatcher,\n      this._ngZone, this._viewportRuler, config)\n\n  /** Block scrolling. */\n  block = () => new BlockScrollStrategy(this._viewportRuler, this._document);\n\n  /**\n   * Update the overlay's position on scroll.\n   * @param config Configuration to be used inside the scroll strategy.\n   * Allows debouncing the reposition calls.\n   */\n  reposition = (config?: RepositionScrollStrategyConfig) => new RepositionScrollStrategy(\n      this._scrollDispatcher, this._viewportRuler, this._ngZone, config)\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport {CdkScrollable, ScrollDispatcher} from '@angular/cdk/scrolling';\n\n// Export pre-defined scroll strategies and interface to build custom ones.\nexport {ScrollStrategy} from './scroll-strategy';\nexport {ScrollStrategyOptions} from './scroll-strategy-options';\nexport {\n  RepositionScrollStrategy,\n  RepositionScrollStrategyConfig\n} from './reposition-scroll-strategy';\nexport {CloseScrollStrategy} from './close-scroll-strategy';\nexport {NoopScrollStrategy} from './noop-scroll-strategy';\nexport {BlockScrollStrategy} from './block-scroll-strategy';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {PositionStrategy} from './position/position-strategy';\nimport {Direction, Directionality} from '@angular/cdk/bidi';\nimport {ScrollStrategy, NoopScrollStrategy} from './scroll/index';\n\n\n/** Initial configuration used when creating an overlay. */\nexport class OverlayConfig {\n  /** Strategy with which to position the overlay. */\n  positionStrategy?: PositionStrategy;\n\n  /** Strategy to be used when handling scroll events while the overlay is open. */\n  scrollStrategy?: ScrollStrategy = new NoopScrollStrategy();\n\n  /** Custom class to add to the overlay pane. */\n  panelClass?: string | string[] = '';\n\n  /** Whether the overlay has a backdrop. */\n  hasBackdrop?: boolean = false;\n\n  /** Custom class to add to the backdrop */\n  backdropClass?: string | string[] = 'cdk-overlay-dark-backdrop';\n\n  /** The width of the overlay panel. If a number is provided, pixel units are assumed. */\n  width?: number | string;\n\n  /** The height of the overlay panel. If a number is provided, pixel units are assumed. */\n  height?: number | string;\n\n  /** The min-width of the overlay panel. If a number is provided, pixel units are assumed. */\n  minWidth?: number | string;\n\n  /** The min-height of the overlay panel. If a number is provided, pixel units are assumed. */\n  minHeight?: number | string;\n\n  /** The max-width of the overlay panel. If a number is provided, pixel units are assumed. */\n  maxWidth?: number | string;\n\n  /** The max-height of the overlay panel. If a number is provided, pixel units are assumed. */\n  maxHeight?: number | string;\n\n  /**\n   * Direction of the text in the overlay panel. If a `Directionality` instance\n   * is passed in, the overlay will handle changes to its value automatically.\n   */\n  direction?: Direction | Directionality;\n\n  /**\n   * Whether the overlay should be disposed of when the user goes backwards/forwards in history.\n   * Note that this usually doesn't include clicking on links (unless the user is using\n   * the `HashLocationStrategy`).\n   */\n  disposeOnNavigation?: boolean = false;\n\n  constructor(config?: OverlayConfig) {\n    if (config) {\n      // Use `Iterable` instead of `Array` because TypeScript, as of 3.6.3,\n      // loses the array generic type in the `for of`. But we *also* have to use `Array` because\n      // typescript won't iterate over an `Iterable` unless you compile with `--downlevelIteration`\n      const configKeys =\n          Object.keys(config) as Iterable<keyof OverlayConfig> & (keyof OverlayConfig)[];\n      for (const key of configKeys) {\n        if (config[key] !== undefined) {\n          // TypeScript, as of version 3.5, sees the left-hand-side of this expression\n          // as \"I don't know *which* key this is, so the only valid value is the intersection\n          // of all the posible values.\" In this case, that happens to be `undefined`. TypeScript\n          // is not smart enough to see that the right-hand-side is actually an access of the same\n          // exact type with the same exact key, meaning that the value type must be identical.\n          // So we use `any` to work around this.\n          this[key] = config[key] as any;\n        }\n      }\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/** Horizontal dimension of a connection point on the perimeter of the origin or overlay element. */\nimport {Optional} from '@angular/core';\nexport type HorizontalConnectionPos = 'start' | 'center' | 'end';\n\n/** Vertical dimension of a connection point on the perimeter of the origin or overlay element. */\nexport type VerticalConnectionPos = 'top' | 'center' | 'bottom';\n\n\n/** A connection point on the origin element. */\nexport interface OriginConnectionPosition {\n  originX: HorizontalConnectionPos;\n  originY: VerticalConnectionPos;\n}\n\n/** A connection point on the overlay element. */\nexport interface OverlayConnectionPosition {\n  overlayX: HorizontalConnectionPos;\n  overlayY: VerticalConnectionPos;\n}\n\n/** The points of the origin element and the overlay element to connect. */\nexport class ConnectionPositionPair {\n  /** X-axis attachment point for connected overlay origin. Can be 'start', 'end', or 'center'. */\n  originX: HorizontalConnectionPos;\n  /** Y-axis attachment point for connected overlay origin. Can be 'top', 'bottom', or 'center'. */\n  originY: VerticalConnectionPos;\n  /** X-axis attachment point for connected overlay. Can be 'start', 'end', or 'center'. */\n  overlayX: HorizontalConnectionPos;\n  /** Y-axis attachment point for connected overlay. Can be 'top', 'bottom', or 'center'. */\n  overlayY: VerticalConnectionPos;\n\n  constructor(\n    origin: OriginConnectionPosition,\n    overlay: OverlayConnectionPosition,\n    /** Offset along the X axis. */\n    public offsetX?: number,\n    /** Offset along the Y axis. */\n    public offsetY?: number,\n    /** Class(es) to be applied to the panel while this position is active. */\n    public panelClass?: string | string[]) {\n\n    this.originX = origin.originX;\n    this.originY = origin.originY;\n    this.overlayX = overlay.overlayX;\n    this.overlayY = overlay.overlayY;\n  }\n}\n\n/**\n * Set of properties regarding the position of the origin and overlay relative to the viewport\n * with respect to the containing Scrollable elements.\n *\n * The overlay and origin are clipped if any part of their bounding client rectangle exceeds the\n * bounds of any one of the strategy's Scrollable's bounding client rectangle.\n *\n * The overlay and origin are outside view if there is no overlap between their bounding client\n * rectangle and any one of the strategy's Scrollable's bounding client rectangle.\n *\n *       -----------                    -----------\n *       | outside |                    | clipped |\n *       |  view   |              --------------------------\n *       |         |              |     |         |        |\n *       ----------               |     -----------        |\n *  --------------------------    |                        |\n *  |                        |    |      Scrollable        |\n *  |                        |    |                        |\n *  |                        |     --------------------------\n *  |      Scrollable        |\n *  |                        |\n *  --------------------------\n *\n *  @docs-private\n */\nexport class ScrollingVisibility {\n  isOriginClipped: boolean;\n  isOriginOutsideView: boolean;\n  isOverlayClipped: boolean;\n  isOverlayOutsideView: boolean;\n}\n\n/** The change event emitted by the strategy when a fallback position is used. */\nexport class ConnectedOverlayPositionChange {\n  constructor(\n      /** The position used as a result of this change. */\n      public connectionPair: ConnectionPositionPair,\n      /** @docs-private */\n      @Optional() public scrollableViewProperties: ScrollingVisibility) {}\n}\n\n/**\n * Validates whether a vertical position property matches the expected values.\n * @param property Name of the property being validated.\n * @param value Value of the property being validated.\n * @docs-private\n */\nexport function validateVerticalPosition(property: string, value: VerticalConnectionPos) {\n  if (value !== 'top' && value !== 'bottom' && value !== 'center') {\n    throw Error(`ConnectedPosition: Invalid ${property} \"${value}\". ` +\n                `Expected \"top\", \"bottom\" or \"center\".`);\n  }\n}\n\n/**\n * Validates whether a horizontal position property matches the expected values.\n * @param property Name of the property being validated.\n * @param value Value of the property being validated.\n * @docs-private\n */\nexport function validateHorizontalPosition(property: string, value: HorizontalConnectionPos) {\n  if (value !== 'start' && value !== 'end' && value !== 'center') {\n    throw Error(`ConnectedPosition: Invalid ${property} \"${value}\". ` +\n                `Expected \"start\", \"end\" or \"center\".`);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT} from '@angular/common';\nimport {Inject, Injectable, OnDestroy} from '@angular/core';\nimport {OverlayReference} from '../overlay-reference';\n\n\n/**\n * Service for dispatching events that land on the body to appropriate overlay ref,\n * if any. It maintains a list of attached overlays to determine best suited overlay based\n * on event target and order of overlay opens.\n */\n@Injectable({providedIn: 'root'})\nexport abstract class BaseOverlayDispatcher implements OnDestroy {\n\n  /** Currently attached overlays in the order they were attached. */\n  _attachedOverlays: OverlayReference[] = [];\n\n  protected _document: Document;\n  protected _isAttached: boolean;\n\n  constructor(@Inject(DOCUMENT) document: any) {\n    this._document = document;\n  }\n\n  ngOnDestroy(): void {\n    this.detach();\n  }\n\n  /** Add a new overlay to the list of attached overlay refs. */\n  add(overlayRef: OverlayReference): void {\n    // Ensure that we don't get the same overlay multiple times.\n    this.remove(overlayRef);\n    this._attachedOverlays.push(overlayRef);\n  }\n\n  /** Remove an overlay from the list of attached overlay refs. */\n  remove(overlayRef: OverlayReference): void {\n    const index = this._attachedOverlays.indexOf(overlayRef);\n\n    if (index > -1) {\n      this._attachedOverlays.splice(index, 1);\n    }\n\n    // Remove the global listener once there are no more overlays.\n    if (this._attachedOverlays.length === 0) {\n      this.detach();\n    }\n  }\n\n  /** Detaches the global event listener. */\n  protected abstract detach(): void;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT} from '@angular/common';\nimport {\n  Inject,\n  Injectable,\n  InjectionToken,\n  Optional,\n  SkipSelf,\n} from '@angular/core';\nimport {OverlayReference} from '../overlay-reference';\nimport {BaseOverlayDispatcher} from './base-overlay-dispatcher';\n\n\n/**\n * Service for dispatching keyboard events that land on the body to appropriate overlay ref,\n * if any. It maintains a list of attached overlays to determine best suited overlay based\n * on event target and order of overlay opens.\n */\n@Injectable({providedIn: 'root'})\nexport class OverlayKeyboardDispatcher extends BaseOverlayDispatcher {\n\n  constructor(@Inject(DOCUMENT) document: any) {\n    super(document);\n  }\n\n  /** Add a new overlay to the list of attached overlay refs. */\n  add(overlayRef: OverlayReference): void {\n    super.add(overlayRef);\n\n    // Lazily start dispatcher once first overlay is added\n    if (!this._isAttached) {\n      this._document.body.addEventListener('keydown', this._keydownListener);\n      this._isAttached = true;\n    }\n  }\n\n  /** Detaches the global keyboard event listener. */\n  protected detach() {\n    if (this._isAttached) {\n      this._document.body.removeEventListener('keydown', this._keydownListener);\n      this._isAttached = false;\n    }\n  }\n\n  /** Keyboard event listener that will be attached to the body. */\n  private _keydownListener = (event: KeyboardEvent) => {\n    const overlays = this._attachedOverlays;\n\n    for (let i = overlays.length - 1; i > -1; i--) {\n      // Dispatch the keydown event to the top overlay which has subscribers to its keydown events.\n      // We want to target the most recent overlay, rather than trying to match where the event came\n      // from, because some components might open an overlay, but keep focus on a trigger element\n      // (e.g. for select and autocomplete). We skip overlays without keydown event subscriptions,\n      // because we don't want overlays that don't handle keyboard events to block the ones below\n      // them that do.\n      if (overlays[i]._keydownEvents.observers.length > 0) {\n        overlays[i]._keydownEvents.next(event);\n        break;\n      }\n    }\n  }\n}\n\n\n/** @docs-private @deprecated @breaking-change 8.0.0 */\nexport function OVERLAY_KEYBOARD_DISPATCHER_PROVIDER_FACTORY(\n    dispatcher: OverlayKeyboardDispatcher, _document: any) {\n  return dispatcher || new OverlayKeyboardDispatcher(_document);\n}\n\n/** @docs-private @deprecated @breaking-change 8.0.0 */\nexport const OVERLAY_KEYBOARD_DISPATCHER_PROVIDER = {\n  // If there is already an OverlayKeyboardDispatcher available, use that.\n  // Otherwise, provide a new one.\n  provide: OverlayKeyboardDispatcher,\n  deps: [\n    [new Optional(), new SkipSelf(), OverlayKeyboardDispatcher],\n\n    // Coerce to `InjectionToken` so that the `deps` match the \"shape\"\n    // of the type expected by Angular\n    DOCUMENT as InjectionToken<any>\n  ],\n  useFactory: OVERLAY_KEYBOARD_DISPATCHER_PROVIDER_FACTORY\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT} from '@angular/common';\nimport {Inject, Injectable} from '@angular/core';\nimport {OverlayReference} from '../overlay-reference';\nimport {Platform} from '@angular/cdk/platform';\nimport {BaseOverlayDispatcher} from './base-overlay-dispatcher';\n\n/**\n * Service for dispatching mouse click events that land on the body to appropriate overlay ref,\n * if any. It maintains a list of attached overlays to determine best suited overlay based\n * on event target and order of overlay opens.\n */\n@Injectable({providedIn: 'root'})\nexport class OverlayOutsideClickDispatcher extends BaseOverlayDispatcher {\n  private _cursorOriginalValue: string;\n  private _cursorStyleIsSet = false;\n\n  constructor(@Inject(DOCUMENT) document: any, private _platform: Platform) {\n    super(document);\n  }\n\n  /** Add a new overlay to the list of attached overlay refs. */\n  add(overlayRef: OverlayReference): void {\n    super.add(overlayRef);\n\n    // tslint:disable: max-line-length\n    // Safari on iOS does not generate click events for non-interactive\n    // elements. However, we want to receive a click for any element outside\n    // the overlay. We can force a \"clickable\" state by setting\n    // `cursor: pointer` on the document body.\n    // See https://developer.mozilla.org/en-US/docs/Web/API/Element/click_event#Safari_Mobile\n    // and https://developer.apple.com/library/archive/documentation/AppleApplications/Reference/SafariWebContent/HandlingEvents/HandlingEvents.html\n    // tslint:enable: max-line-length\n    if (!this._isAttached) {\n      this._document.body.addEventListener('click', this._clickListener, true);\n      this._document.body.addEventListener('contextmenu', this._clickListener, true);\n\n      // click event is not fired on iOS. To make element \"clickable\" we are\n      // setting the cursor to pointer\n      if (this._platform.IOS && !this._cursorStyleIsSet) {\n        this._cursorOriginalValue = this._document.body.style.cursor;\n        this._document.body.style.cursor = 'pointer';\n        this._cursorStyleIsSet = true;\n      }\n\n      this._isAttached = true;\n    }\n  }\n\n  /** Detaches the global keyboard event listener. */\n  protected detach() {\n    if (this._isAttached) {\n      this._document.body.removeEventListener('click', this._clickListener, true);\n      this._document.body.removeEventListener('contextmenu', this._clickListener, true);\n      if (this._platform.IOS && this._cursorStyleIsSet) {\n        this._document.body.style.cursor = this._cursorOriginalValue;\n        this._cursorStyleIsSet = false;\n      }\n      this._isAttached = false;\n    }\n  }\n\n  /** Click event listener that will be attached to the body propagate phase. */\n  private _clickListener = (event: MouseEvent) => {\n    // Get the target through the `composedPath` if possible to account for shadow DOM.\n    const target = event.composedPath ? event.composedPath()[0] : event.target;\n    // We copy the array because the original may be modified asynchronously if the\n    // outsidePointerEvents listener decides to detach overlays resulting in index errors inside\n    // the for loop.\n    const overlays = this._attachedOverlays.slice();\n\n    // Dispatch the mouse event to the top overlay which has subscribers to its mouse events.\n    // We want to target all overlays for which the click could be considered as outside click.\n    // As soon as we reach an overlay for which the click is not outside click we break off\n    // the loop.\n    for (let i = overlays.length - 1; i > -1; i--) {\n      const overlayRef = overlays[i];\n      if (overlayRef._outsidePointerEvents.observers.length < 1 || !overlayRef.hasAttached()) {\n        continue;\n      }\n\n      // If it's a click inside the overlay, just break - we should do nothing\n      // If it's an outside click dispatch the mouse event, and proceed with the next overlay\n      if (overlayRef.overlayElement.contains(target as Node)) {\n        break;\n      }\n\n      overlayRef._outsidePointerEvents.next(event);\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT} from '@angular/common';\nimport {\n  Inject,\n  Injectable,\n  InjectionToken,\n  OnDestroy,\n  Optional,\n  SkipSelf,\n} from '@angular/core';\nimport {Platform} from '@angular/cdk/platform';\n\n/**\n * Whether we're in a testing environment.\n * TODO(crisbeto): remove this once we have an overlay testing module.\n */\nconst isTestEnvironment: boolean = typeof window !== 'undefined' && !!window &&\n  !!((window as any).__karma__ || (window as any).jasmine);\n\n/** Container inside which all overlays will render. */\n@Injectable({providedIn: 'root'})\nexport class OverlayContainer implements OnDestroy {\n  protected _containerElement: HTMLElement;\n  protected _document: Document;\n\n  constructor(\n    @Inject(DOCUMENT) document: any,\n    /**\n     * @deprecated `platform` parameter to become required.\n     * @breaking-change 10.0.0\n     */\n    protected _platform?: Platform) {\n    this._document = document;\n  }\n\n  ngOnDestroy() {\n    const container = this._containerElement;\n\n    if (container && container.parentNode) {\n      container.parentNode.removeChild(container);\n    }\n  }\n\n  /**\n   * This method returns the overlay container element. It will lazily\n   * create the element the first time  it is called to facilitate using\n   * the container in non-browser environments.\n   * @returns the container element\n   */\n  getContainerElement(): HTMLElement {\n    if (!this._containerElement) {\n      this._createContainer();\n    }\n\n    return this._containerElement;\n  }\n\n  /**\n   * Create the overlay container element, which is simply a div\n   * with the 'cdk-overlay-container' class on the document body.\n   */\n  protected _createContainer(): void {\n    // @breaking-change 10.0.0 Remove null check for `_platform`.\n    const isBrowser = this._platform ? this._platform.isBrowser : typeof window !== 'undefined';\n    const containerClass = 'cdk-overlay-container';\n\n    if (isBrowser || isTestEnvironment) {\n      const oppositePlatformContainers =\n          this._document.querySelectorAll(`.${containerClass}[platform=\"server\"], ` +\n                                          `.${containerClass}[platform=\"test\"]`);\n\n      // Remove any old containers from the opposite platform.\n      // This can happen when transitioning from the server to the client.\n      for (let i = 0; i < oppositePlatformContainers.length; i++) {\n        oppositePlatformContainers[i].parentNode!.removeChild(oppositePlatformContainers[i]);\n      }\n    }\n\n    const container = this._document.createElement('div');\n    container.classList.add(containerClass);\n\n    // A long time ago we kept adding new overlay containers whenever a new app was instantiated,\n    // but at some point we added logic which clears the duplicate ones in order to avoid leaks.\n    // The new logic was a little too aggressive since it was breaking some legitimate use cases.\n    // To mitigate the problem we made it so that only containers from a different platform are\n    // cleared, but the side-effect was that people started depending on the overly-aggressive\n    // logic to clean up their tests for them. Until we can introduce an overlay-specific testing\n    // module which does the cleanup, we try to detect that we're in a test environment and we\n    // always clear the container. See #17006.\n    // TODO(crisbeto): remove the test environment check once we have an overlay testing module.\n    if (isTestEnvironment) {\n      container.setAttribute('platform', 'test');\n    } else if (!isBrowser) {\n      container.setAttribute('platform', 'server');\n    }\n\n    this._document.body.appendChild(container);\n    this._containerElement = container;\n  }\n}\n\n\n/** @docs-private @deprecated @breaking-change 8.0.0 */\nexport function OVERLAY_CONTAINER_PROVIDER_FACTORY(parentContainer: OverlayContainer,\n  _document: any) {\n  return parentContainer || new OverlayContainer(_document);\n}\n\n/** @docs-private @deprecated @breaking-change 8.0.0 */\nexport const OVERLAY_CONTAINER_PROVIDER = {\n  // If there is already an OverlayContainer available, use that. Otherwise, provide a new one.\n  provide: OverlayContainer,\n  deps: [\n    [new Optional(), new SkipSelf(), OverlayContainer],\n    DOCUMENT as InjectionToken<any> // We need to use the InjectionToken somewhere to keep TS happy\n  ],\n  useFactory: OVERLAY_CONTAINER_PROVIDER_FACTORY\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Direction, Directionality} from '@angular/cdk/bidi';\nimport {ComponentPortal, Portal, PortalOutlet, TemplatePortal} from '@angular/cdk/portal';\nimport {ComponentRef, EmbeddedViewRef, NgZone} from '@angular/core';\nimport {Location} from '@angular/common';\nimport {Observable, Subject, merge, SubscriptionLike, Subscription} from 'rxjs';\nimport {take, takeUntil} from 'rxjs/operators';\nimport {OverlayKeyboardDispatcher} from './dispatchers/overlay-keyboard-dispatcher';\nimport {OverlayOutsideClickDispatcher} from './dispatchers/overlay-outside-click-dispatcher';\nimport {OverlayConfig} from './overlay-config';\nimport {coerceCssPixelValue, coerceArray} from '@angular/cdk/coercion';\nimport {OverlayReference} from './overlay-reference';\nimport {PositionStrategy} from './position/position-strategy';\nimport {ScrollStrategy} from './scroll';\n\n\n/** An object where all of its properties cannot be written. */\nexport type ImmutableObject<T> = {\n  readonly [P in keyof T]: T[P];\n};\n\n/**\n * Reference to an overlay that has been created with the Overlay service.\n * Used to manipulate or dispose of said overlay.\n */\nexport class OverlayRef implements PortalOutlet, OverlayReference {\n  private _backdropElement: HTMLElement | null = null;\n  private _backdropClick: Subject<MouseEvent> = new Subject();\n  private _attachments = new Subject<void>();\n  private _detachments = new Subject<void>();\n  private _positionStrategy: PositionStrategy | undefined;\n  private _scrollStrategy: ScrollStrategy | undefined;\n  private _locationChanges: SubscriptionLike = Subscription.EMPTY;\n  private _backdropClickHandler = (event: MouseEvent) => this._backdropClick.next(event);\n\n  /**\n   * Reference to the parent of the `_host` at the time it was detached. Used to restore\n   * the `_host` to its original position in the DOM when it gets re-attached.\n   */\n  private _previousHostParent: HTMLElement;\n\n  /** Stream of keydown events dispatched to this overlay. */\n  _keydownEvents = new Subject<KeyboardEvent>();\n\n  /** Stream of mouse outside events dispatched to this overlay. */\n  _outsidePointerEvents = new Subject<MouseEvent>();\n\n  constructor(\n      private _portalOutlet: PortalOutlet,\n      private _host: HTMLElement,\n      private _pane: HTMLElement,\n      private _config: ImmutableObject<OverlayConfig>,\n      private _ngZone: NgZone,\n      private _keyboardDispatcher: OverlayKeyboardDispatcher,\n      private _document: Document,\n      // @breaking-change 8.0.0 `_location` parameter to be made required.\n      private _location?: Location,\n      // @breaking-change 9.0.0 `_mouseClickDispatcher` parameter to be made required.\n      private _outsideClickDispatcher?: OverlayOutsideClickDispatcher) {\n\n    if (_config.scrollStrategy) {\n      this._scrollStrategy = _config.scrollStrategy;\n      this._scrollStrategy.attach(this);\n    }\n\n    this._positionStrategy = _config.positionStrategy;\n  }\n\n  /** The overlay's HTML element */\n  get overlayElement(): HTMLElement {\n    return this._pane;\n  }\n\n  /** The overlay's backdrop HTML element. */\n  get backdropElement(): HTMLElement | null {\n    return this._backdropElement;\n  }\n\n  /**\n   * Wrapper around the panel element. Can be used for advanced\n   * positioning where a wrapper with specific styling is\n   * required around the overlay pane.\n   */\n  get hostElement(): HTMLElement {\n    return this._host;\n  }\n\n  attach<T>(portal: ComponentPortal<T>): ComponentRef<T>;\n  attach<T>(portal: TemplatePortal<T>): EmbeddedViewRef<T>;\n  attach(portal: any): any;\n\n  /**\n   * Attaches content, given via a Portal, to the overlay.\n   * If the overlay is configured to have a backdrop, it will be created.\n   *\n   * @param portal Portal instance to which to attach the overlay.\n   * @returns The portal attachment result.\n   */\n  attach(portal: Portal<any>): any {\n    let attachResult = this._portalOutlet.attach(portal);\n\n    // Update the pane element with the given configuration.\n    if (!this._host.parentElement && this._previousHostParent) {\n      this._previousHostParent.appendChild(this._host);\n    }\n\n    if (this._positionStrategy) {\n      this._positionStrategy.attach(this);\n    }\n\n    this._updateStackingOrder();\n    this._updateElementSize();\n    this._updateElementDirection();\n\n    if (this._scrollStrategy) {\n      this._scrollStrategy.enable();\n    }\n\n    // Update the position once the zone is stable so that the overlay will be fully rendered\n    // before attempting to position it, as the position may depend on the size of the rendered\n    // content.\n    this._ngZone.onStable\n      .pipe(take(1))\n      .subscribe(() => {\n        // The overlay could've been detached before the zone has stabilized.\n        if (this.hasAttached()) {\n          this.updatePosition();\n        }\n      });\n\n    // Enable pointer events for the overlay pane element.\n    this._togglePointerEvents(true);\n\n    if (this._config.hasBackdrop) {\n      this._attachBackdrop();\n    }\n\n    if (this._config.panelClass) {\n      this._toggleClasses(this._pane, this._config.panelClass, true);\n    }\n\n    // Only emit the `attachments` event once all other setup is done.\n    this._attachments.next();\n\n    // Track this overlay by the keyboard dispatcher\n    this._keyboardDispatcher.add(this);\n\n    // @breaking-change 8.0.0 remove the null check for `_location`\n    // once the constructor parameter is made required.\n    if (this._config.disposeOnNavigation && this._location) {\n      this._locationChanges = this._location.subscribe(() => this.dispose());\n    }\n\n    // @breaking-change 9.0.0 remove the null check for `_mouseClickDispatcher`\n    if (this._outsideClickDispatcher) {\n      this._outsideClickDispatcher.add(this);\n    }\n\n    return attachResult;\n  }\n\n  /**\n   * Detaches an overlay from a portal.\n   * @returns The portal detachment result.\n   */\n  detach(): any {\n    if (!this.hasAttached()) {\n      return;\n    }\n\n    this.detachBackdrop();\n\n    // When the overlay is detached, the pane element should disable pointer events.\n    // This is necessary because otherwise the pane element will cover the page and disable\n    // pointer events therefore. Depends on the position strategy and the applied pane boundaries.\n    this._togglePointerEvents(false);\n\n    if (this._positionStrategy && this._positionStrategy.detach) {\n      this._positionStrategy.detach();\n    }\n\n    if (this._scrollStrategy) {\n      this._scrollStrategy.disable();\n    }\n\n    const detachmentResult = this._portalOutlet.detach();\n\n    // Only emit after everything is detached.\n    this._detachments.next();\n\n    // Remove this overlay from keyboard dispatcher tracking.\n    this._keyboardDispatcher.remove(this);\n\n    // Keeping the host element in the DOM can cause scroll jank, because it still gets\n    // rendered, even though it's transparent and unclickable which is why we remove it.\n    this._detachContentWhenStable();\n\n    // Stop listening for location changes.\n    this._locationChanges.unsubscribe();\n\n    // @breaking-change 9.0.0 remove the null check for `_outsideClickDispatcher`\n    if (this._outsideClickDispatcher) {\n      this._outsideClickDispatcher.remove(this);\n    }\n\n    return detachmentResult;\n  }\n\n  /** Cleans up the overlay from the DOM. */\n  dispose(): void {\n    const isAttached = this.hasAttached();\n\n    if (this._positionStrategy) {\n      this._positionStrategy.dispose();\n    }\n\n    this._disposeScrollStrategy();\n    this.detachBackdrop();\n    this._locationChanges.unsubscribe();\n    this._keyboardDispatcher.remove(this);\n    this._portalOutlet.dispose();\n    this._attachments.complete();\n    this._backdropClick.complete();\n    this._keydownEvents.complete();\n    this._outsidePointerEvents.complete();\n\n    // @breaking-change 9.0.0 remove the null check for `_outsideClickDispatcher`\n    if (this._outsideClickDispatcher) {\n      this._outsideClickDispatcher.remove(this);\n    }\n\n    if (this._host && this._host.parentNode) {\n      this._host.parentNode.removeChild(this._host);\n      this._host = null!;\n    }\n\n    this._previousHostParent = this._pane = null!;\n\n    if (isAttached) {\n      this._detachments.next();\n    }\n\n    this._detachments.complete();\n  }\n\n  /** Whether the overlay has attached content. */\n  hasAttached(): boolean {\n    return this._portalOutlet.hasAttached();\n  }\n\n  /** Gets an observable that emits when the backdrop has been clicked. */\n  backdropClick(): Observable<MouseEvent> {\n    return this._backdropClick;\n  }\n\n  /** Gets an observable that emits when the overlay has been attached. */\n  attachments(): Observable<void> {\n    return this._attachments;\n  }\n\n  /** Gets an observable that emits when the overlay has been detached. */\n  detachments(): Observable<void> {\n    return this._detachments;\n  }\n\n  /** Gets an observable of keydown events targeted to this overlay. */\n  keydownEvents(): Observable<KeyboardEvent> {\n    return this._keydownEvents;\n  }\n\n  /** Gets an observable of pointer events targeted outside this overlay. */\n  outsidePointerEvents(): Observable<MouseEvent> {\n    return this._outsidePointerEvents;\n  }\n\n  /** Gets the current overlay configuration, which is immutable. */\n  getConfig(): OverlayConfig {\n    return this._config;\n  }\n\n  /** Updates the position of the overlay based on the position strategy. */\n  updatePosition(): void {\n    if (this._positionStrategy) {\n      this._positionStrategy.apply();\n    }\n  }\n\n  /** Switches to a new position strategy and updates the overlay position. */\n  updatePositionStrategy(strategy: PositionStrategy): void {\n    if (strategy === this._positionStrategy) {\n      return;\n    }\n\n    if (this._positionStrategy) {\n      this._positionStrategy.dispose();\n    }\n\n    this._positionStrategy = strategy;\n\n    if (this.hasAttached()) {\n      strategy.attach(this);\n      this.updatePosition();\n    }\n  }\n\n  /** Update the size properties of the overlay. */\n  updateSize(sizeConfig: OverlaySizeConfig): void {\n    this._config = {...this._config, ...sizeConfig};\n    this._updateElementSize();\n  }\n\n  /** Sets the LTR/RTL direction for the overlay. */\n  setDirection(dir: Direction | Directionality): void {\n    this._config = {...this._config, direction: dir};\n    this._updateElementDirection();\n  }\n\n  /** Add a CSS class or an array of classes to the overlay pane. */\n  addPanelClass(classes: string | string[]): void {\n    if (this._pane) {\n      this._toggleClasses(this._pane, classes, true);\n    }\n  }\n\n  /** Remove a CSS class or an array of classes from the overlay pane. */\n  removePanelClass(classes: string | string[]): void {\n    if (this._pane) {\n      this._toggleClasses(this._pane, classes, false);\n    }\n  }\n\n  /**\n   * Returns the layout direction of the overlay panel.\n   */\n  getDirection(): Direction {\n    const direction = this._config.direction;\n\n    if (!direction) {\n      return 'ltr';\n    }\n\n    return typeof direction === 'string' ? direction : direction.value;\n  }\n\n  /** Switches to a new scroll strategy. */\n  updateScrollStrategy(strategy: ScrollStrategy): void {\n    if (strategy === this._scrollStrategy) {\n      return;\n    }\n\n    this._disposeScrollStrategy();\n    this._scrollStrategy = strategy;\n\n    if (this.hasAttached()) {\n      strategy.attach(this);\n      strategy.enable();\n    }\n  }\n\n  /** Updates the text direction of the overlay panel. */\n  private _updateElementDirection() {\n    this._host.setAttribute('dir', this.getDirection());\n  }\n\n  /** Updates the size of the overlay element based on the overlay config. */\n  private _updateElementSize() {\n    if (!this._pane) {\n      return;\n    }\n\n    const style = this._pane.style;\n\n    style.width = coerceCssPixelValue(this._config.width);\n    style.height = coerceCssPixelValue(this._config.height);\n    style.minWidth = coerceCssPixelValue(this._config.minWidth);\n    style.minHeight = coerceCssPixelValue(this._config.minHeight);\n    style.maxWidth = coerceCssPixelValue(this._config.maxWidth);\n    style.maxHeight = coerceCssPixelValue(this._config.maxHeight);\n  }\n\n  /** Toggles the pointer events for the overlay pane element. */\n  private _togglePointerEvents(enablePointer: boolean) {\n    this._pane.style.pointerEvents = enablePointer ? 'auto' : 'none';\n  }\n\n  /** Attaches a backdrop for this overlay. */\n  private _attachBackdrop() {\n    const showingClass = 'cdk-overlay-backdrop-showing';\n\n    this._backdropElement = this._document.createElement('div');\n    this._backdropElement.classList.add('cdk-overlay-backdrop');\n\n    if (this._config.backdropClass) {\n      this._toggleClasses(this._backdropElement, this._config.backdropClass, true);\n    }\n\n    // Insert the backdrop before the pane in the DOM order,\n    // in order to handle stacked overlays properly.\n    this._host.parentElement!.insertBefore(this._backdropElement, this._host);\n\n    // Forward backdrop clicks such that the consumer of the overlay can perform whatever\n    // action desired when such a click occurs (usually closing the overlay).\n    this._backdropElement.addEventListener('click', this._backdropClickHandler);\n\n    // Add class to fade-in the backdrop after one frame.\n    if (typeof requestAnimationFrame !== 'undefined') {\n      this._ngZone.runOutsideAngular(() => {\n        requestAnimationFrame(() => {\n          if (this._backdropElement) {\n            this._backdropElement.classList.add(showingClass);\n          }\n        });\n      });\n    } else {\n      this._backdropElement.classList.add(showingClass);\n    }\n  }\n\n  /**\n   * Updates the stacking order of the element, moving it to the top if necessary.\n   * This is required in cases where one overlay was detached, while another one,\n   * that should be behind it, was destroyed. The next time both of them are opened,\n   * the stacking will be wrong, because the detached element's pane will still be\n   * in its original DOM position.\n   */\n  private _updateStackingOrder() {\n    if (this._host.nextSibling) {\n      this._host.parentNode!.appendChild(this._host);\n    }\n  }\n\n  /** Detaches the backdrop (if any) associated with the overlay. */\n  detachBackdrop(): void {\n    let backdropToDetach = this._backdropElement;\n\n    if (!backdropToDetach) {\n      return;\n    }\n\n    let timeoutId: number;\n    let finishDetach = () => {\n      // It may not be attached to anything in certain cases (e.g. unit tests).\n      if (backdropToDetach) {\n        backdropToDetach.removeEventListener('click', this._backdropClickHandler);\n        backdropToDetach.removeEventListener('transitionend', finishDetach);\n\n        if (backdropToDetach.parentNode) {\n          backdropToDetach.parentNode.removeChild(backdropToDetach);\n        }\n      }\n\n      // It is possible that a new portal has been attached to this overlay since we started\n      // removing the backdrop. If that is the case, only clear the backdrop reference if it\n      // is still the same instance that we started to remove.\n      if (this._backdropElement == backdropToDetach) {\n        this._backdropElement = null;\n      }\n\n      if (this._config.backdropClass) {\n        this._toggleClasses(backdropToDetach!, this._config.backdropClass, false);\n      }\n\n      clearTimeout(timeoutId);\n    };\n\n    backdropToDetach.classList.remove('cdk-overlay-backdrop-showing');\n\n    this._ngZone.runOutsideAngular(() => {\n      backdropToDetach!.addEventListener('transitionend', finishDetach);\n    });\n\n    // If the backdrop doesn't have a transition, the `transitionend` event won't fire.\n    // In this case we make it unclickable and we try to remove it after a delay.\n    backdropToDetach.style.pointerEvents = 'none';\n\n    // Run this outside the Angular zone because there's nothing that Angular cares about.\n    // If it were to run inside the Angular zone, every test that used Overlay would have to be\n    // either async or fakeAsync.\n    timeoutId = this._ngZone.runOutsideAngular(() => setTimeout(finishDetach, 500));\n  }\n\n  /** Toggles a single CSS class or an array of classes on an element. */\n  private _toggleClasses(element: HTMLElement, cssClasses: string | string[], isAdd: boolean) {\n    const classList = element.classList;\n\n    coerceArray(cssClasses).forEach(cssClass => {\n      // We can't do a spread here, because IE doesn't support setting multiple classes.\n      // Also trying to add an empty string to a DOMTokenList will throw.\n      if (cssClass) {\n        isAdd ? classList.add(cssClass) : classList.remove(cssClass);\n      }\n    });\n  }\n\n  /** Detaches the overlay content next time the zone stabilizes. */\n  private _detachContentWhenStable() {\n    // Normally we wouldn't have to explicitly run this outside the `NgZone`, however\n    // if the consumer is using `zone-patch-rxjs`, the `Subscription.unsubscribe` call will\n    // be patched to run inside the zone, which will throw us into an infinite loop.\n    this._ngZone.runOutsideAngular(() => {\n      // We can't remove the host here immediately, because the overlay pane's content\n      // might still be animating. This stream helps us avoid interrupting the animation\n      // by waiting for the pane to become empty.\n      const subscription = this._ngZone.onStable\n        .pipe(takeUntil(merge(this._attachments, this._detachments)))\n        .subscribe(() => {\n          // Needs a couple of checks for the pane and host, because\n          // they may have been removed by the time the zone stabilizes.\n          if (!this._pane || !this._host || this._pane.children.length === 0) {\n            if (this._pane && this._config.panelClass) {\n              this._toggleClasses(this._pane, this._config.panelClass, false);\n            }\n\n            if (this._host && this._host.parentElement) {\n              this._previousHostParent = this._host.parentElement;\n              this._previousHostParent.removeChild(this._host);\n            }\n\n            subscription.unsubscribe();\n          }\n        });\n    });\n  }\n\n  /** Disposes of a scroll strategy. */\n  private _disposeScrollStrategy() {\n    const scrollStrategy = this._scrollStrategy;\n\n    if (scrollStrategy) {\n      scrollStrategy.disable();\n\n      if (scrollStrategy.detach) {\n        scrollStrategy.detach();\n      }\n    }\n  }\n}\n\n\n/** Size properties for an overlay. */\nexport interface OverlaySizeConfig {\n  width?: number | string;\n  height?: number | string;\n  minWidth?: number | string;\n  minHeight?: number | string;\n  maxWidth?: number | string;\n  maxHeight?: number | string;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {PositionStrategy} from './position-strategy';\nimport {ElementRef} from '@angular/core';\nimport {ViewportRuler, CdkScrollable, ViewportScrollPosition} from '@angular/cdk/scrolling';\nimport {\n  ConnectedOverlayPositionChange,\n  ConnectionPositionPair,\n  ScrollingVisibility,\n  validateHorizontalPosition,\n  validateVerticalPosition,\n} from './connected-position';\nimport {Observable, Subscription, Subject} from 'rxjs';\nimport {OverlayReference} from '../overlay-reference';\nimport {isElementScrolledOutsideView, isElementClippedByScrolling} from './scroll-clip';\nimport {coerceCssPixelValue, coerceArray} from '@angular/cdk/coercion';\nimport {Platform} from '@angular/cdk/platform';\nimport {OverlayContainer} from '../overlay-container';\n\n// TODO: refactor clipping detection into a separate thing (part of scrolling module)\n// TODO: doesn't handle both flexible width and height when it has to scroll along both axis.\n\n/** Class to be added to the overlay bounding box. */\nconst boundingBoxClass = 'cdk-overlay-connected-position-bounding-box';\n\n/** Regex used to split a string on its CSS units. */\nconst cssUnitPattern = /([A-Za-z%]+)$/;\n\n/** Possible values that can be set as the origin of a FlexibleConnectedPositionStrategy. */\nexport type FlexibleConnectedPositionStrategyOrigin = ElementRef | Element | Point & {\n  width?: number;\n  height?: number;\n};\n\n/**\n * A strategy for positioning overlays. Using this strategy, an overlay is given an\n * implicit position relative some origin element. The relative position is defined in terms of\n * a point on the origin element that is connected to a point on the overlay element. For example,\n * a basic dropdown is connecting the bottom-left corner of the origin to the top-left corner\n * of the overlay.\n */\nexport class FlexibleConnectedPositionStrategy implements PositionStrategy {\n  /** The overlay to which this strategy is attached. */\n  private _overlayRef: OverlayReference;\n\n  /** Whether we're performing the very first positioning of the overlay. */\n  private _isInitialRender: boolean;\n\n  /** Last size used for the bounding box. Used to avoid resizing the overlay after open. */\n  private _lastBoundingBoxSize = {width: 0, height: 0};\n\n  /** Whether the overlay was pushed in a previous positioning. */\n  private _isPushed = false;\n\n  /** Whether the overlay can be pushed on-screen on the initial open. */\n  private _canPush = true;\n\n  /** Whether the overlay can grow via flexible width/height after the initial open. */\n  private _growAfterOpen = false;\n\n  /** Whether the overlay's width and height can be constrained to fit within the viewport. */\n  private _hasFlexibleDimensions = true;\n\n  /** Whether the overlay position is locked. */\n  private _positionLocked = false;\n\n  /** Cached origin dimensions */\n  private _originRect: ClientRect;\n\n  /** Cached overlay dimensions */\n  private _overlayRect: ClientRect;\n\n  /** Cached viewport dimensions */\n  private _viewportRect: ClientRect;\n\n  /** Amount of space that must be maintained between the overlay and the edge of the viewport. */\n  private _viewportMargin = 0;\n\n  /** The Scrollable containers used to check scrollable view properties on position change. */\n  private _scrollables: CdkScrollable[] = [];\n\n  /** Ordered list of preferred positions, from most to least desirable. */\n  _preferredPositions: ConnectionPositionPair[] = [];\n\n  /** The origin element against which the overlay will be positioned. */\n  private _origin: FlexibleConnectedPositionStrategyOrigin;\n\n  /** The overlay pane element. */\n  private _pane: HTMLElement;\n\n  /** Whether the strategy has been disposed of already. */\n  private _isDisposed: boolean;\n\n  /**\n   * Parent element for the overlay panel used to constrain the overlay panel's size to fit\n   * within the viewport.\n   */\n  private _boundingBox: HTMLElement | null;\n\n  /** The last position to have been calculated as the best fit position. */\n  private _lastPosition: ConnectedPosition | null;\n\n  /** Subject that emits whenever the position changes. */\n  private _positionChanges = new Subject<ConnectedOverlayPositionChange>();\n\n  /** Subscription to viewport size changes. */\n  private _resizeSubscription = Subscription.EMPTY;\n\n  /** Default offset for the overlay along the x axis. */\n  private _offsetX = 0;\n\n  /** Default offset for the overlay along the y axis. */\n  private _offsetY = 0;\n\n  /** Selector to be used when finding the elements on which to set the transform origin. */\n  private _transformOriginSelector: string;\n\n  /** Keeps track of the CSS classes that the position strategy has applied on the overlay panel. */\n  private _appliedPanelClasses: string[] = [];\n\n  /** Amount by which the overlay was pushed in each axis during the last time it was positioned. */\n  private _previousPushAmount: {x: number, y: number} | null;\n\n  /** Observable sequence of position changes. */\n  positionChanges: Observable<ConnectedOverlayPositionChange> = this._positionChanges;\n\n  /** Ordered list of preferred positions, from most to least desirable. */\n  get positions(): ConnectionPositionPair[] {\n    return this._preferredPositions;\n  }\n\n  constructor(\n      connectedTo: FlexibleConnectedPositionStrategyOrigin, private _viewportRuler: ViewportRuler,\n      private _document: Document, private _platform: Platform,\n      private _overlayContainer: OverlayContainer) {\n    this.setOrigin(connectedTo);\n  }\n\n  /** Attaches this position strategy to an overlay. */\n  attach(overlayRef: OverlayReference): void {\n    if (this._overlayRef && overlayRef !== this._overlayRef &&\n      (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw Error('This position strategy is already attached to an overlay');\n    }\n\n    this._validatePositions();\n\n    overlayRef.hostElement.classList.add(boundingBoxClass);\n\n    this._overlayRef = overlayRef;\n    this._boundingBox = overlayRef.hostElement;\n    this._pane = overlayRef.overlayElement;\n    this._isDisposed = false;\n    this._isInitialRender = true;\n    this._lastPosition = null;\n    this._resizeSubscription.unsubscribe();\n    this._resizeSubscription = this._viewportRuler.change().subscribe(() => {\n      // When the window is resized, we want to trigger the next reposition as if it\n      // was an initial render, in order for the strategy to pick a new optimal position,\n      // otherwise position locking will cause it to stay at the old one.\n      this._isInitialRender = true;\n      this.apply();\n    });\n  }\n\n  /**\n   * Updates the position of the overlay element, using whichever preferred position relative\n   * to the origin best fits on-screen.\n   *\n   * The selection of a position goes as follows:\n   *  - If any positions fit completely within the viewport as-is,\n   *      choose the first position that does so.\n   *  - If flexible dimensions are enabled and at least one satifies the given minimum width/height,\n   *      choose the position with the greatest available size modified by the positions' weight.\n   *  - If pushing is enabled, take the position that went off-screen the least and push it\n   *      on-screen.\n   *  - If none of the previous criteria were met, use the position that goes off-screen the least.\n   * @docs-private\n   */\n  apply(): void {\n    // We shouldn't do anything if the strategy was disposed or we're on the server.\n    if (this._isDisposed || !this._platform.isBrowser) {\n      return;\n    }\n\n    // If the position has been applied already (e.g. when the overlay was opened) and the\n    // consumer opted into locking in the position, re-use the old position, in order to\n    // prevent the overlay from jumping around.\n    if (!this._isInitialRender && this._positionLocked && this._lastPosition) {\n      this.reapplyLastPosition();\n      return;\n    }\n\n    this._clearPanelClasses();\n    this._resetOverlayElementStyles();\n    this._resetBoundingBoxStyles();\n\n    // We need the bounding rects for the origin and the overlay to determine how to position\n    // the overlay relative to the origin.\n    // We use the viewport rect to determine whether a position would go off-screen.\n    this._viewportRect = this._getNarrowedViewportRect();\n    this._originRect = this._getOriginRect();\n    this._overlayRect = this._pane.getBoundingClientRect();\n\n    const originRect = this._originRect;\n    const overlayRect = this._overlayRect;\n    const viewportRect = this._viewportRect;\n\n    // Positions where the overlay will fit with flexible dimensions.\n    const flexibleFits: FlexibleFit[] = [];\n\n    // Fallback if none of the preferred positions fit within the viewport.\n    let fallback: FallbackPosition | undefined;\n\n    // Go through each of the preferred positions looking for a good fit.\n    // If a good fit is found, it will be applied immediately.\n    for (let pos of this._preferredPositions) {\n      // Get the exact (x, y) coordinate for the point-of-origin on the origin element.\n      let originPoint = this._getOriginPoint(originRect, pos);\n\n      // From that point-of-origin, get the exact (x, y) coordinate for the top-left corner of the\n      // overlay in this position. We use the top-left corner for calculations and later translate\n      // this into an appropriate (top, left, bottom, right) style.\n      let overlayPoint = this._getOverlayPoint(originPoint, overlayRect, pos);\n\n      // Calculate how well the overlay would fit into the viewport with this point.\n      let overlayFit = this._getOverlayFit(overlayPoint, overlayRect, viewportRect, pos);\n\n      // If the overlay, without any further work, fits into the viewport, use this position.\n      if (overlayFit.isCompletelyWithinViewport) {\n        this._isPushed = false;\n        this._applyPosition(pos, originPoint);\n        return;\n      }\n\n      // If the overlay has flexible dimensions, we can use this position\n      // so long as there's enough space for the minimum dimensions.\n      if (this._canFitWithFlexibleDimensions(overlayFit, overlayPoint, viewportRect)) {\n        // Save positions where the overlay will fit with flexible dimensions. We will use these\n        // if none of the positions fit *without* flexible dimensions.\n        flexibleFits.push({\n          position: pos,\n          origin: originPoint,\n          overlayRect,\n          boundingBoxRect: this._calculateBoundingBoxRect(originPoint, pos)\n        });\n\n        continue;\n      }\n\n      // If the current preferred position does not fit on the screen, remember the position\n      // if it has more visible area on-screen than we've seen and move onto the next preferred\n      // position.\n      if (!fallback || fallback.overlayFit.visibleArea < overlayFit.visibleArea) {\n        fallback = {overlayFit, overlayPoint, originPoint, position: pos, overlayRect};\n      }\n    }\n\n    // If there are any positions where the overlay would fit with flexible dimensions, choose the\n    // one that has the greatest area available modified by the position's weight\n    if (flexibleFits.length) {\n      let bestFit: FlexibleFit | null = null;\n      let bestScore = -1;\n      for (const fit of flexibleFits) {\n        const score =\n            fit.boundingBoxRect.width * fit.boundingBoxRect.height * (fit.position.weight || 1);\n        if (score > bestScore) {\n          bestScore = score;\n          bestFit = fit;\n        }\n      }\n\n      this._isPushed = false;\n      this._applyPosition(bestFit!.position, bestFit!.origin);\n      return;\n    }\n\n    // When none of the preferred positions fit within the viewport, take the position\n    // that went off-screen the least and attempt to push it on-screen.\n    if (this._canPush) {\n      // TODO(jelbourn): after pushing, the opening \"direction\" of the overlay might not make sense.\n      this._isPushed = true;\n      this._applyPosition(fallback!.position, fallback!.originPoint);\n      return;\n    }\n\n    // All options for getting the overlay within the viewport have been exhausted, so go with the\n    // position that went off-screen the least.\n    this._applyPosition(fallback!.position, fallback!.originPoint);\n  }\n\n  detach(): void {\n    this._clearPanelClasses();\n    this._lastPosition = null;\n    this._previousPushAmount = null;\n    this._resizeSubscription.unsubscribe();\n  }\n\n  /** Cleanup after the element gets destroyed. */\n  dispose(): void {\n    if (this._isDisposed) {\n      return;\n    }\n\n    // We can't use `_resetBoundingBoxStyles` here, because it resets\n    // some properties to zero, rather than removing them.\n    if (this._boundingBox) {\n      extendStyles(this._boundingBox.style, {\n        top: '',\n        left: '',\n        right: '',\n        bottom: '',\n        height: '',\n        width: '',\n        alignItems: '',\n        justifyContent: '',\n      } as CSSStyleDeclaration);\n    }\n\n    if (this._pane) {\n      this._resetOverlayElementStyles();\n    }\n\n    if (this._overlayRef) {\n      this._overlayRef.hostElement.classList.remove(boundingBoxClass);\n    }\n\n    this.detach();\n    this._positionChanges.complete();\n    this._overlayRef = this._boundingBox = null!;\n    this._isDisposed = true;\n  }\n\n  /**\n   * This re-aligns the overlay element with the trigger in its last calculated position,\n   * even if a position higher in the \"preferred positions\" list would now fit. This\n   * allows one to re-align the panel without changing the orientation of the panel.\n   */\n  reapplyLastPosition(): void {\n    if (!this._isDisposed && (!this._platform || this._platform.isBrowser)) {\n      this._originRect = this._getOriginRect();\n      this._overlayRect = this._pane.getBoundingClientRect();\n      this._viewportRect = this._getNarrowedViewportRect();\n\n      const lastPosition = this._lastPosition || this._preferredPositions[0];\n      const originPoint = this._getOriginPoint(this._originRect, lastPosition);\n\n      this._applyPosition(lastPosition, originPoint);\n    }\n  }\n\n  /**\n   * Sets the list of Scrollable containers that host the origin element so that\n   * on reposition we can evaluate if it or the overlay has been clipped or outside view. Every\n   * Scrollable must be an ancestor element of the strategy's origin element.\n   */\n  withScrollableContainers(scrollables: CdkScrollable[]): this {\n    this._scrollables = scrollables;\n    return this;\n  }\n\n  /**\n   * Adds new preferred positions.\n   * @param positions List of positions options for this overlay.\n   */\n  withPositions(positions: ConnectedPosition[]): this {\n    this._preferredPositions = positions;\n\n    // If the last calculated position object isn't part of the positions anymore, clear\n    // it in order to avoid it being picked up if the consumer tries to re-apply.\n    if (positions.indexOf(this._lastPosition!) === -1) {\n      this._lastPosition = null;\n    }\n\n    this._validatePositions();\n\n    return this;\n  }\n\n  /**\n   * Sets a minimum distance the overlay may be positioned to the edge of the viewport.\n   * @param margin Required margin between the overlay and the viewport edge in pixels.\n   */\n  withViewportMargin(margin: number): this {\n    this._viewportMargin = margin;\n    return this;\n  }\n\n  /** Sets whether the overlay's width and height can be constrained to fit within the viewport. */\n  withFlexibleDimensions(flexibleDimensions = true): this {\n    this._hasFlexibleDimensions = flexibleDimensions;\n    return this;\n  }\n\n  /** Sets whether the overlay can grow after the initial open via flexible width/height. */\n  withGrowAfterOpen(growAfterOpen = true): this {\n    this._growAfterOpen = growAfterOpen;\n    return this;\n  }\n\n  /** Sets whether the overlay can be pushed on-screen if none of the provided positions fit. */\n  withPush(canPush = true): this {\n    this._canPush = canPush;\n    return this;\n  }\n\n  /**\n   * Sets whether the overlay's position should be locked in after it is positioned\n   * initially. When an overlay is locked in, it won't attempt to reposition itself\n   * when the position is re-applied (e.g. when the user scrolls away).\n   * @param isLocked Whether the overlay should locked in.\n   */\n  withLockedPosition(isLocked = true): this {\n    this._positionLocked = isLocked;\n    return this;\n  }\n\n  /**\n   * Sets the origin, relative to which to position the overlay.\n   * Using an element origin is useful for building components that need to be positioned\n   * relatively to a trigger (e.g. dropdown menus or tooltips), whereas using a point can be\n   * used for cases like contextual menus which open relative to the user's pointer.\n   * @param origin Reference to the new origin.\n   */\n  setOrigin(origin: FlexibleConnectedPositionStrategyOrigin): this {\n    this._origin = origin;\n    return this;\n  }\n\n  /**\n   * Sets the default offset for the overlay's connection point on the x-axis.\n   * @param offset New offset in the X axis.\n   */\n  withDefaultOffsetX(offset: number): this {\n    this._offsetX = offset;\n    return this;\n  }\n\n  /**\n   * Sets the default offset for the overlay's connection point on the y-axis.\n   * @param offset New offset in the Y axis.\n   */\n  withDefaultOffsetY(offset: number): this {\n    this._offsetY = offset;\n    return this;\n  }\n\n  /**\n   * Configures that the position strategy should set a `transform-origin` on some elements\n   * inside the overlay, depending on the current position that is being applied. This is\n   * useful for the cases where the origin of an animation can change depending on the\n   * alignment of the overlay.\n   * @param selector CSS selector that will be used to find the target\n   *    elements onto which to set the transform origin.\n   */\n  withTransformOriginOn(selector: string): this {\n    this._transformOriginSelector = selector;\n    return this;\n  }\n\n  /**\n   * Gets the (x, y) coordinate of a connection point on the origin based on a relative position.\n   */\n  private _getOriginPoint(originRect: ClientRect, pos: ConnectedPosition): Point {\n    let x: number;\n    if (pos.originX == 'center') {\n      // Note: when centering we should always use the `left`\n      // offset, otherwise the position will be wrong in RTL.\n      x = originRect.left + (originRect.width / 2);\n    } else {\n      const startX = this._isRtl() ? originRect.right : originRect.left;\n      const endX = this._isRtl() ? originRect.left : originRect.right;\n      x = pos.originX == 'start' ? startX : endX;\n    }\n\n    let y: number;\n    if (pos.originY == 'center') {\n      y = originRect.top + (originRect.height / 2);\n    } else {\n      y = pos.originY == 'top' ? originRect.top : originRect.bottom;\n    }\n\n    return {x, y};\n  }\n\n\n  /**\n   * Gets the (x, y) coordinate of the top-left corner of the overlay given a given position and\n   * origin point to which the overlay should be connected.\n   */\n  private _getOverlayPoint(\n      originPoint: Point,\n      overlayRect: ClientRect,\n      pos: ConnectedPosition): Point {\n\n    // Calculate the (overlayStartX, overlayStartY), the start of the\n    // potential overlay position relative to the origin point.\n    let overlayStartX: number;\n    if (pos.overlayX == 'center') {\n      overlayStartX = -overlayRect.width / 2;\n    } else if (pos.overlayX === 'start') {\n      overlayStartX = this._isRtl() ? -overlayRect.width : 0;\n    } else {\n      overlayStartX = this._isRtl() ? 0 : -overlayRect.width;\n    }\n\n    let overlayStartY: number;\n    if (pos.overlayY == 'center') {\n      overlayStartY = -overlayRect.height / 2;\n    } else {\n      overlayStartY = pos.overlayY == 'top' ? 0 : -overlayRect.height;\n    }\n\n    // The (x, y) coordinates of the overlay.\n    return {\n      x: originPoint.x + overlayStartX,\n      y: originPoint.y + overlayStartY,\n    };\n  }\n\n  /** Gets how well an overlay at the given point will fit within the viewport. */\n  private _getOverlayFit(point: Point, overlay: ClientRect, viewport: ClientRect,\n    position: ConnectedPosition): OverlayFit {\n\n    let {x, y} = point;\n    let offsetX = this._getOffset(position, 'x');\n    let offsetY = this._getOffset(position, 'y');\n\n    // Account for the offsets since they could push the overlay out of the viewport.\n    if (offsetX) {\n      x += offsetX;\n    }\n\n    if (offsetY) {\n      y += offsetY;\n    }\n\n    // How much the overlay would overflow at this position, on each side.\n    let leftOverflow = 0 - x;\n    let rightOverflow = (x + overlay.width) - viewport.width;\n    let topOverflow = 0 - y;\n    let bottomOverflow = (y + overlay.height) - viewport.height;\n\n    // Visible parts of the element on each axis.\n    let visibleWidth = this._subtractOverflows(overlay.width, leftOverflow, rightOverflow);\n    let visibleHeight = this._subtractOverflows(overlay.height, topOverflow, bottomOverflow);\n    let visibleArea = visibleWidth * visibleHeight;\n\n    return {\n      visibleArea,\n      isCompletelyWithinViewport: (overlay.width * overlay.height) === visibleArea,\n      fitsInViewportVertically: visibleHeight === overlay.height,\n      fitsInViewportHorizontally: visibleWidth == overlay.width,\n    };\n  }\n\n  /**\n   * Whether the overlay can fit within the viewport when it may resize either its width or height.\n   * @param fit How well the overlay fits in the viewport at some position.\n   * @param point The (x, y) coordinates of the overlat at some position.\n   * @param viewport The geometry of the viewport.\n   */\n  private _canFitWithFlexibleDimensions(fit: OverlayFit, point: Point, viewport: ClientRect) {\n    if (this._hasFlexibleDimensions) {\n      const availableHeight = viewport.bottom - point.y;\n      const availableWidth = viewport.right - point.x;\n      const minHeight = getPixelValue(this._overlayRef.getConfig().minHeight);\n      const minWidth = getPixelValue(this._overlayRef.getConfig().minWidth);\n\n      const verticalFit = fit.fitsInViewportVertically ||\n          (minHeight != null && minHeight <= availableHeight);\n      const horizontalFit = fit.fitsInViewportHorizontally ||\n          (minWidth != null && minWidth <= availableWidth);\n\n      return verticalFit && horizontalFit;\n    }\n    return false;\n  }\n\n  /**\n   * Gets the point at which the overlay can be \"pushed\" on-screen. If the overlay is larger than\n   * the viewport, the top-left corner will be pushed on-screen (with overflow occuring on the\n   * right and bottom).\n   *\n   * @param start Starting point from which the overlay is pushed.\n   * @param overlay Dimensions of the overlay.\n   * @param scrollPosition Current viewport scroll position.\n   * @returns The point at which to position the overlay after pushing. This is effectively a new\n   *     originPoint.\n   */\n  private _pushOverlayOnScreen(start: Point,\n                               overlay: ClientRect,\n                               scrollPosition: ViewportScrollPosition): Point {\n    // If the position is locked and we've pushed the overlay already, reuse the previous push\n    // amount, rather than pushing it again. If we were to continue pushing, the element would\n    // remain in the viewport, which goes against the expectations when position locking is enabled.\n    if (this._previousPushAmount && this._positionLocked) {\n      return {\n        x: start.x + this._previousPushAmount.x,\n        y: start.y + this._previousPushAmount.y\n      };\n    }\n\n    const viewport = this._viewportRect;\n\n    // Determine how much the overlay goes outside the viewport on each\n    // side, which we'll use to decide which direction to push it.\n    const overflowRight = Math.max(start.x + overlay.width - viewport.width, 0);\n    const overflowBottom = Math.max(start.y + overlay.height - viewport.height, 0);\n    const overflowTop = Math.max(viewport.top - scrollPosition.top - start.y, 0);\n    const overflowLeft = Math.max(viewport.left - scrollPosition.left - start.x, 0);\n\n    // Amount by which to push the overlay in each axis such that it remains on-screen.\n    let pushX = 0;\n    let pushY = 0;\n\n    // If the overlay fits completely within the bounds of the viewport, push it from whichever\n    // direction is goes off-screen. Otherwise, push the top-left corner such that its in the\n    // viewport and allow for the trailing end of the overlay to go out of bounds.\n    if (overlay.width <= viewport.width) {\n      pushX = overflowLeft || -overflowRight;\n    } else {\n      pushX = start.x < this._viewportMargin ? (viewport.left - scrollPosition.left) - start.x : 0;\n    }\n\n    if (overlay.height <= viewport.height) {\n      pushY = overflowTop || -overflowBottom;\n    } else {\n      pushY = start.y < this._viewportMargin ? (viewport.top - scrollPosition.top) - start.y : 0;\n    }\n\n    this._previousPushAmount = {x: pushX, y: pushY};\n\n    return {\n      x: start.x + pushX,\n      y: start.y + pushY,\n    };\n  }\n\n  /**\n   * Applies a computed position to the overlay and emits a position change.\n   * @param position The position preference\n   * @param originPoint The point on the origin element where the overlay is connected.\n   */\n  private _applyPosition(position: ConnectedPosition, originPoint: Point) {\n    this._setTransformOrigin(position);\n    this._setOverlayElementStyles(originPoint, position);\n    this._setBoundingBoxStyles(originPoint, position);\n\n    if (position.panelClass) {\n      this._addPanelClasses(position.panelClass);\n    }\n\n    // Save the last connected position in case the position needs to be re-calculated.\n    this._lastPosition = position;\n\n    // Notify that the position has been changed along with its change properties.\n    // We only emit if we've got any subscriptions, because the scroll visibility\n    // calculcations can be somewhat expensive.\n    if (this._positionChanges.observers.length) {\n      const scrollableViewProperties = this._getScrollVisibility();\n      const changeEvent = new ConnectedOverlayPositionChange(position, scrollableViewProperties);\n      this._positionChanges.next(changeEvent);\n    }\n\n    this._isInitialRender = false;\n  }\n\n  /** Sets the transform origin based on the configured selector and the passed-in position.  */\n  private _setTransformOrigin(position: ConnectedPosition) {\n    if (!this._transformOriginSelector) {\n      return;\n    }\n\n    const elements: NodeListOf<HTMLElement> =\n        this._boundingBox!.querySelectorAll(this._transformOriginSelector);\n    let xOrigin: 'left' | 'right' | 'center';\n    let yOrigin: 'top' | 'bottom' | 'center' = position.overlayY;\n\n    if (position.overlayX === 'center') {\n      xOrigin = 'center';\n    } else if (this._isRtl()) {\n      xOrigin = position.overlayX === 'start' ? 'right' : 'left';\n    } else {\n      xOrigin = position.overlayX === 'start' ? 'left' : 'right';\n    }\n\n    for (let i = 0; i < elements.length; i++) {\n      elements[i].style.transformOrigin = `${xOrigin} ${yOrigin}`;\n    }\n  }\n\n  /**\n   * Gets the position and size of the overlay's sizing container.\n   *\n   * This method does no measuring and applies no styles so that we can cheaply compute the\n   * bounds for all positions and choose the best fit based on these results.\n   */\n  private _calculateBoundingBoxRect(origin: Point, position: ConnectedPosition): BoundingBoxRect {\n    const viewport = this._viewportRect;\n    const isRtl = this._isRtl();\n    let height: number, top: number, bottom: number;\n\n    if (position.overlayY === 'top') {\n      // Overlay is opening \"downward\" and thus is bound by the bottom viewport edge.\n      top = origin.y;\n      height = viewport.height - top + this._viewportMargin;\n    } else if (position.overlayY === 'bottom') {\n      // Overlay is opening \"upward\" and thus is bound by the top viewport edge. We need to add\n      // the viewport margin back in, because the viewport rect is narrowed down to remove the\n      // margin, whereas the `origin` position is calculated based on its `ClientRect`.\n      bottom = viewport.height - origin.y + this._viewportMargin * 2;\n      height = viewport.height - bottom + this._viewportMargin;\n    } else {\n      // If neither top nor bottom, it means that the overlay is vertically centered on the\n      // origin point. Note that we want the position relative to the viewport, rather than\n      // the page, which is why we don't use something like `viewport.bottom - origin.y` and\n      // `origin.y - viewport.top`.\n      const smallestDistanceToViewportEdge =\n          Math.min(viewport.bottom - origin.y + viewport.top, origin.y);\n\n      const previousHeight = this._lastBoundingBoxSize.height;\n\n      height = smallestDistanceToViewportEdge * 2;\n      top = origin.y - smallestDistanceToViewportEdge;\n\n      if (height > previousHeight && !this._isInitialRender && !this._growAfterOpen) {\n        top = origin.y - (previousHeight / 2);\n      }\n    }\n\n    // The overlay is opening 'right-ward' (the content flows to the right).\n    const isBoundedByRightViewportEdge =\n        (position.overlayX === 'start' && !isRtl) ||\n        (position.overlayX === 'end' && isRtl);\n\n    // The overlay is opening 'left-ward' (the content flows to the left).\n    const isBoundedByLeftViewportEdge =\n        (position.overlayX === 'end' && !isRtl) ||\n        (position.overlayX === 'start' && isRtl);\n\n    let width: number, left: number, right: number;\n\n    if (isBoundedByLeftViewportEdge) {\n      right = viewport.width - origin.x + this._viewportMargin;\n      width = origin.x - this._viewportMargin;\n    } else if (isBoundedByRightViewportEdge) {\n      left = origin.x;\n      width = viewport.right - origin.x;\n    } else {\n      // If neither start nor end, it means that the overlay is horizontally centered on the\n      // origin point. Note that we want the position relative to the viewport, rather than\n      // the page, which is why we don't use something like `viewport.right - origin.x` and\n      // `origin.x - viewport.left`.\n      const smallestDistanceToViewportEdge =\n          Math.min(viewport.right - origin.x + viewport.left, origin.x);\n      const previousWidth = this._lastBoundingBoxSize.width;\n\n      width = smallestDistanceToViewportEdge * 2;\n      left = origin.x - smallestDistanceToViewportEdge;\n\n      if (width > previousWidth && !this._isInitialRender && !this._growAfterOpen) {\n        left = origin.x - (previousWidth / 2);\n      }\n    }\n\n    return {top: top!, left: left!, bottom: bottom!, right: right!, width, height};\n  }\n\n  /**\n   * Sets the position and size of the overlay's sizing wrapper. The wrapper is positioned on the\n   * origin's connection point and stetches to the bounds of the viewport.\n   *\n   * @param origin The point on the origin element where the overlay is connected.\n   * @param position The position preference\n   */\n  private _setBoundingBoxStyles(origin: Point, position: ConnectedPosition): void {\n    const boundingBoxRect = this._calculateBoundingBoxRect(origin, position);\n\n    // It's weird if the overlay *grows* while scrolling, so we take the last size into account\n    // when applying a new size.\n    if (!this._isInitialRender && !this._growAfterOpen) {\n      boundingBoxRect.height = Math.min(boundingBoxRect.height, this._lastBoundingBoxSize.height);\n      boundingBoxRect.width = Math.min(boundingBoxRect.width, this._lastBoundingBoxSize.width);\n    }\n\n    const styles = {} as CSSStyleDeclaration;\n\n    if (this._hasExactPosition()) {\n      styles.top = styles.left = '0';\n      styles.bottom = styles.right = styles.maxHeight = styles.maxWidth = '';\n      styles.width = styles.height = '100%';\n    } else {\n      const maxHeight = this._overlayRef.getConfig().maxHeight;\n      const maxWidth = this._overlayRef.getConfig().maxWidth;\n\n      styles.height = coerceCssPixelValue(boundingBoxRect.height);\n      styles.top = coerceCssPixelValue(boundingBoxRect.top);\n      styles.bottom = coerceCssPixelValue(boundingBoxRect.bottom);\n      styles.width = coerceCssPixelValue(boundingBoxRect.width);\n      styles.left = coerceCssPixelValue(boundingBoxRect.left);\n      styles.right = coerceCssPixelValue(boundingBoxRect.right);\n\n      // Push the pane content towards the proper direction.\n      if (position.overlayX === 'center') {\n        styles.alignItems = 'center';\n      } else {\n        styles.alignItems = position.overlayX === 'end' ? 'flex-end' : 'flex-start';\n      }\n\n      if (position.overlayY === 'center') {\n        styles.justifyContent = 'center';\n      } else {\n        styles.justifyContent = position.overlayY === 'bottom' ? 'flex-end' : 'flex-start';\n      }\n\n      if (maxHeight) {\n        styles.maxHeight = coerceCssPixelValue(maxHeight);\n      }\n\n      if (maxWidth) {\n        styles.maxWidth = coerceCssPixelValue(maxWidth);\n      }\n    }\n\n    this._lastBoundingBoxSize = boundingBoxRect;\n\n    extendStyles(this._boundingBox!.style, styles);\n  }\n\n  /** Resets the styles for the bounding box so that a new positioning can be computed. */\n  private _resetBoundingBoxStyles() {\n    extendStyles(this._boundingBox!.style, {\n      top: '0',\n      left: '0',\n      right: '0',\n      bottom: '0',\n      height: '',\n      width: '',\n      alignItems: '',\n      justifyContent: '',\n    } as CSSStyleDeclaration);\n  }\n\n  /** Resets the styles for the overlay pane so that a new positioning can be computed. */\n  private _resetOverlayElementStyles() {\n    extendStyles(this._pane.style, {\n      top: '',\n      left: '',\n      bottom: '',\n      right: '',\n      position: '',\n      transform: '',\n    } as CSSStyleDeclaration);\n  }\n\n  /** Sets positioning styles to the overlay element. */\n  private _setOverlayElementStyles(originPoint: Point, position: ConnectedPosition): void {\n    const styles = {} as CSSStyleDeclaration;\n    const hasExactPosition = this._hasExactPosition();\n    const hasFlexibleDimensions = this._hasFlexibleDimensions;\n    const config = this._overlayRef.getConfig();\n\n    if (hasExactPosition) {\n      const scrollPosition = this._viewportRuler.getViewportScrollPosition();\n      extendStyles(styles, this._getExactOverlayY(position, originPoint, scrollPosition));\n      extendStyles(styles, this._getExactOverlayX(position, originPoint, scrollPosition));\n    } else {\n      styles.position = 'static';\n    }\n\n    // Use a transform to apply the offsets. We do this because the `center` positions rely on\n    // being in the normal flex flow and setting a `top` / `left` at all will completely throw\n    // off the position. We also can't use margins, because they won't have an effect in some\n    // cases where the element doesn't have anything to \"push off of\". Finally, this works\n    // better both with flexible and non-flexible positioning.\n    let transformString = '';\n    let offsetX = this._getOffset(position, 'x');\n    let offsetY = this._getOffset(position, 'y');\n\n    if (offsetX) {\n      transformString += `translateX(${offsetX}px) `;\n    }\n\n    if (offsetY) {\n      transformString += `translateY(${offsetY}px)`;\n    }\n\n    styles.transform = transformString.trim();\n\n    // If a maxWidth or maxHeight is specified on the overlay, we remove them. We do this because\n    // we need these values to both be set to \"100%\" for the automatic flexible sizing to work.\n    // The maxHeight and maxWidth are set on the boundingBox in order to enforce the constraint.\n    // Note that this doesn't apply when we have an exact position, in which case we do want to\n    // apply them because they'll be cleared from the bounding box.\n    if (config.maxHeight) {\n      if (hasExactPosition) {\n        styles.maxHeight = coerceCssPixelValue(config.maxHeight);\n      } else if (hasFlexibleDimensions) {\n        styles.maxHeight = '';\n      }\n    }\n\n    if (config.maxWidth) {\n      if (hasExactPosition) {\n        styles.maxWidth = coerceCssPixelValue(config.maxWidth);\n      } else if (hasFlexibleDimensions) {\n        styles.maxWidth = '';\n      }\n    }\n\n    extendStyles(this._pane.style, styles);\n  }\n\n  /** Gets the exact top/bottom for the overlay when not using flexible sizing or when pushing. */\n  private _getExactOverlayY(position: ConnectedPosition,\n                            originPoint: Point,\n                            scrollPosition: ViewportScrollPosition) {\n    // Reset any existing styles. This is necessary in case the\n    // preferred position has changed since the last `apply`.\n    let styles = {top: '', bottom: ''} as CSSStyleDeclaration;\n    let overlayPoint = this._getOverlayPoint(originPoint, this._overlayRect, position);\n\n    if (this._isPushed) {\n      overlayPoint = this._pushOverlayOnScreen(overlayPoint, this._overlayRect, scrollPosition);\n    }\n\n    let virtualKeyboardOffset =\n        this._overlayContainer.getContainerElement().getBoundingClientRect().top;\n\n    // Normally this would be zero, however when the overlay is attached to an input (e.g. in an\n    // autocomplete), mobile browsers will shift everything in order to put the input in the middle\n    // of the screen and to make space for the virtual keyboard. We need to account for this offset,\n    // otherwise our positioning will be thrown off.\n    overlayPoint.y -= virtualKeyboardOffset;\n\n    // We want to set either `top` or `bottom` based on whether the overlay wants to appear\n    // above or below the origin and the direction in which the element will expand.\n    if (position.overlayY === 'bottom') {\n      // When using `bottom`, we adjust the y position such that it is the distance\n      // from the bottom of the viewport rather than the top.\n      const documentHeight = this._document.documentElement!.clientHeight;\n      styles.bottom = `${documentHeight - (overlayPoint.y + this._overlayRect.height)}px`;\n    } else {\n      styles.top = coerceCssPixelValue(overlayPoint.y);\n    }\n\n    return styles;\n  }\n\n  /** Gets the exact left/right for the overlay when not using flexible sizing or when pushing. */\n  private _getExactOverlayX(position: ConnectedPosition,\n                            originPoint: Point,\n                            scrollPosition: ViewportScrollPosition) {\n    // Reset any existing styles. This is necessary in case the preferred position has\n    // changed since the last `apply`.\n    let styles = {left: '', right: ''} as CSSStyleDeclaration;\n    let overlayPoint = this._getOverlayPoint(originPoint, this._overlayRect, position);\n\n    if (this._isPushed) {\n      overlayPoint = this._pushOverlayOnScreen(overlayPoint, this._overlayRect, scrollPosition);\n    }\n\n    // We want to set either `left` or `right` based on whether the overlay wants to appear \"before\"\n    // or \"after\" the origin, which determines the direction in which the element will expand.\n    // For the horizontal axis, the meaning of \"before\" and \"after\" change based on whether the\n    // page is in RTL or LTR.\n    let horizontalStyleProperty: 'left' | 'right';\n\n    if (this._isRtl()) {\n      horizontalStyleProperty = position.overlayX === 'end' ? 'left' : 'right';\n    } else {\n      horizontalStyleProperty = position.overlayX === 'end' ? 'right' : 'left';\n    }\n\n    // When we're setting `right`, we adjust the x position such that it is the distance\n    // from the right edge of the viewport rather than the left edge.\n    if (horizontalStyleProperty === 'right') {\n      const documentWidth = this._document.documentElement!.clientWidth;\n      styles.right = `${documentWidth - (overlayPoint.x + this._overlayRect.width)}px`;\n    } else {\n      styles.left = coerceCssPixelValue(overlayPoint.x);\n    }\n\n    return styles;\n  }\n\n  /**\n   * Gets the view properties of the trigger and overlay, including whether they are clipped\n   * or completely outside the view of any of the strategy's scrollables.\n   */\n  private _getScrollVisibility(): ScrollingVisibility {\n    // Note: needs fresh rects since the position could've changed.\n    const originBounds = this._getOriginRect();\n    const overlayBounds =  this._pane.getBoundingClientRect();\n\n    // TODO(jelbourn): instead of needing all of the client rects for these scrolling containers\n    // every time, we should be able to use the scrollTop of the containers if the size of those\n    // containers hasn't changed.\n    const scrollContainerBounds = this._scrollables.map(scrollable => {\n      return scrollable.getElementRef().nativeElement.getBoundingClientRect();\n    });\n\n    return {\n      isOriginClipped: isElementClippedByScrolling(originBounds, scrollContainerBounds),\n      isOriginOutsideView: isElementScrolledOutsideView(originBounds, scrollContainerBounds),\n      isOverlayClipped: isElementClippedByScrolling(overlayBounds, scrollContainerBounds),\n      isOverlayOutsideView: isElementScrolledOutsideView(overlayBounds, scrollContainerBounds),\n    };\n  }\n\n  /** Subtracts the amount that an element is overflowing on an axis from its length. */\n  private _subtractOverflows(length: number, ...overflows: number[]): number {\n    return overflows.reduce((currentValue: number, currentOverflow: number) => {\n      return currentValue - Math.max(currentOverflow, 0);\n    }, length);\n  }\n\n  /** Narrows the given viewport rect by the current _viewportMargin. */\n  private _getNarrowedViewportRect(): ClientRect {\n    // We recalculate the viewport rect here ourselves, rather than using the ViewportRuler,\n    // because we want to use the `clientWidth` and `clientHeight` as the base. The difference\n    // being that the client properties don't include the scrollbar, as opposed to `innerWidth`\n    // and `innerHeight` that do. This is necessary, because the overlay container uses\n    // 100% `width` and `height` which don't include the scrollbar either.\n    const width = this._document.documentElement!.clientWidth;\n    const height = this._document.documentElement!.clientHeight;\n    const scrollPosition = this._viewportRuler.getViewportScrollPosition();\n\n    return {\n      top:    scrollPosition.top + this._viewportMargin,\n      left:   scrollPosition.left + this._viewportMargin,\n      right:  scrollPosition.left + width - this._viewportMargin,\n      bottom: scrollPosition.top + height - this._viewportMargin,\n      width:  width  - (2 * this._viewportMargin),\n      height: height - (2 * this._viewportMargin),\n    };\n  }\n\n  /** Whether the we're dealing with an RTL context */\n  private _isRtl() {\n    return this._overlayRef.getDirection() === 'rtl';\n  }\n\n  /** Determines whether the overlay uses exact or flexible positioning. */\n  private _hasExactPosition() {\n    return !this._hasFlexibleDimensions || this._isPushed;\n  }\n\n  /** Retrieves the offset of a position along the x or y axis. */\n  private _getOffset(position: ConnectedPosition, axis: 'x' | 'y') {\n    if (axis === 'x') {\n      // We don't do something like `position['offset' + axis]` in\n      // order to avoid breking minifiers that rename properties.\n      return position.offsetX == null ? this._offsetX : position.offsetX;\n    }\n\n    return position.offsetY == null ? this._offsetY : position.offsetY;\n  }\n\n  /** Validates that the current position match the expected values. */\n  private _validatePositions(): void {\n    if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      if (!this._preferredPositions.length) {\n        throw Error('FlexibleConnectedPositionStrategy: At least one position is required.');\n      }\n\n      // TODO(crisbeto): remove these once Angular's template type\n      // checking is advanced enough to catch these cases.\n      this._preferredPositions.forEach(pair => {\n        validateHorizontalPosition('originX', pair.originX);\n        validateVerticalPosition('originY', pair.originY);\n        validateHorizontalPosition('overlayX', pair.overlayX);\n        validateVerticalPosition('overlayY', pair.overlayY);\n      });\n    }\n  }\n\n  /** Adds a single CSS class or an array of classes on the overlay panel. */\n  private _addPanelClasses(cssClasses: string | string[]) {\n    if (this._pane) {\n      coerceArray(cssClasses).forEach(cssClass => {\n        if (cssClass !== '' && this._appliedPanelClasses.indexOf(cssClass) === -1) {\n          this._appliedPanelClasses.push(cssClass);\n          this._pane.classList.add(cssClass);\n        }\n      });\n    }\n  }\n\n  /** Clears the classes that the position strategy has applied from the overlay panel. */\n  private _clearPanelClasses() {\n    if (this._pane) {\n      this._appliedPanelClasses.forEach(cssClass => {\n        this._pane.classList.remove(cssClass);\n      });\n      this._appliedPanelClasses = [];\n    }\n  }\n\n  /** Returns the ClientRect of the current origin. */\n  private _getOriginRect(): ClientRect {\n    const origin = this._origin;\n\n    if (origin instanceof ElementRef) {\n      return origin.nativeElement.getBoundingClientRect();\n    }\n\n    // Check for Element so SVG elements are also supported.\n    if (origin instanceof Element) {\n      return origin.getBoundingClientRect();\n    }\n\n    const width = origin.width || 0;\n    const height = origin.height || 0;\n\n    // If the origin is a point, return a client rect as if it was a 0x0 element at the point.\n    return {\n      top: origin.y,\n      bottom: origin.y + height,\n      left: origin.x,\n      right: origin.x + width,\n      height,\n      width\n    };\n  }\n}\n\n/** A simple (x, y) coordinate. */\ninterface Point {\n  x: number;\n  y: number;\n}\n\n/** Record of measurements for how an overlay (at a given position) fits into the viewport. */\ninterface OverlayFit {\n  /** Whether the overlay fits completely in the viewport. */\n  isCompletelyWithinViewport: boolean;\n\n  /** Whether the overlay fits in the viewport on the y-axis. */\n  fitsInViewportVertically: boolean;\n\n  /** Whether the overlay fits in the viewport on the x-axis. */\n  fitsInViewportHorizontally: boolean;\n\n  /** The total visible area (in px^2) of the overlay inside the viewport. */\n  visibleArea: number;\n}\n\n/** Record of the measurments determining whether an overlay will fit in a specific position. */\ninterface FallbackPosition {\n  position: ConnectedPosition;\n  originPoint: Point;\n  overlayPoint: Point;\n  overlayFit: OverlayFit;\n  overlayRect: ClientRect;\n}\n\n/** Position and size of the overlay sizing wrapper for a specific position. */\ninterface BoundingBoxRect {\n  top: number;\n  left: number;\n  bottom: number;\n  right: number;\n  height: number;\n  width: number;\n}\n\n/** Record of measures determining how well a given position will fit with flexible dimensions. */\ninterface FlexibleFit {\n  position: ConnectedPosition;\n  origin: Point;\n  overlayRect: ClientRect;\n  boundingBoxRect: BoundingBoxRect;\n}\n\n/** A connected position as specified by the user. */\nexport interface ConnectedPosition {\n  originX: 'start' | 'center' | 'end';\n  originY: 'top' | 'center' | 'bottom';\n\n  overlayX: 'start' | 'center' | 'end';\n  overlayY: 'top' | 'center' | 'bottom';\n\n  weight?: number;\n  offsetX?: number;\n  offsetY?: number;\n  panelClass?: string | string[];\n}\n\n/** Shallow-extends a stylesheet object with another stylesheet object. */\nfunction extendStyles(destination: CSSStyleDeclaration,\n                      source: CSSStyleDeclaration): CSSStyleDeclaration {\n  for (let key in source) {\n    if (source.hasOwnProperty(key)) {\n      destination[key] = source[key];\n    }\n  }\n\n  return destination;\n}\n\n\n/**\n * Extracts the pixel value as a number from a value, if it's a number\n * or a CSS pixel string (e.g. `1337px`). Otherwise returns null.\n */\nfunction getPixelValue(input: number|string|null|undefined): number|null {\n  if (typeof input !== 'number' && input != null) {\n    const [value, units] = input.split(cssUnitPattern);\n    return (!units || units === 'px') ? parseFloat(value) : null;\n  }\n\n  return input || null;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Direction} from '@angular/cdk/bidi';\nimport {Platform} from '@angular/cdk/platform';\nimport {CdkScrollable, ViewportRuler} from '@angular/cdk/scrolling';\nimport {ElementRef} from '@angular/core';\nimport {Observable} from 'rxjs';\n\nimport {OverlayContainer} from '../overlay-container';\nimport {OverlayReference} from '../overlay-reference';\n\nimport {\n  ConnectedOverlayPositionChange,\n  ConnectionPositionPair,\n  OriginConnectionPosition,\n  OverlayConnectionPosition,\n} from './connected-position';\nimport {FlexibleConnectedPositionStrategy} from './flexible-connected-position-strategy';\nimport {PositionStrategy} from './position-strategy';\n\n/**\n * A strategy for positioning overlays. Using this strategy, an overlay is given an\n * implicit position relative to some origin element. The relative position is defined in terms of\n * a point on the origin element that is connected to a point on the overlay element. For example,\n * a basic dropdown is connecting the bottom-left corner of the origin to the top-left corner\n * of the overlay.\n * @deprecated Use `FlexibleConnectedPositionStrategy` instead.\n * @breaking-change 8.0.0\n */\nexport class ConnectedPositionStrategy implements PositionStrategy {\n  /**\n   * Reference to the underlying position strategy to which all the API calls are proxied.\n   * @docs-private\n   */\n  _positionStrategy: FlexibleConnectedPositionStrategy;\n\n  /** The overlay to which this strategy is attached. */\n  private _overlayRef: OverlayReference;\n\n  private _direction: Direction | null;\n\n  /** Ordered list of preferred positions, from most to least desirable. */\n  _preferredPositions: ConnectionPositionPair[] = [];\n\n  /** Emits an event when the connection point changes. */\n  readonly onPositionChange: Observable<ConnectedOverlayPositionChange>;\n\n  constructor(\n      originPos: OriginConnectionPosition, overlayPos: OverlayConnectionPosition,\n      connectedTo: ElementRef<HTMLElement>, viewportRuler: ViewportRuler, document: Document,\n      platform: Platform, overlayContainer: OverlayContainer) {\n    // Since the `ConnectedPositionStrategy` is deprecated and we don't want to maintain\n    // the extra logic, we create an instance of the positioning strategy that has some\n    // defaults that make it behave as the old position strategy and to which we'll\n    // proxy all of the API calls.\n    this._positionStrategy = new FlexibleConnectedPositionStrategy(\n                                 connectedTo, viewportRuler, document, platform, overlayContainer)\n                                 .withFlexibleDimensions(false)\n                                 .withPush(false)\n                                 .withViewportMargin(0);\n\n    this.withFallbackPosition(originPos, overlayPos);\n    this.onPositionChange = this._positionStrategy.positionChanges;\n  }\n\n  /** Ordered list of preferred positions, from most to least desirable. */\n  get positions(): ConnectionPositionPair[] {\n    return this._preferredPositions;\n  }\n\n  /** Attach this position strategy to an overlay. */\n  attach(overlayRef: OverlayReference): void {\n    this._overlayRef = overlayRef;\n    this._positionStrategy.attach(overlayRef);\n\n    if (this._direction) {\n      overlayRef.setDirection(this._direction);\n      this._direction = null;\n    }\n  }\n\n  /** Disposes all resources used by the position strategy. */\n  dispose() {\n    this._positionStrategy.dispose();\n  }\n\n  /** @docs-private */\n  detach() {\n    this._positionStrategy.detach();\n  }\n\n  /**\n   * Updates the position of the overlay element, using whichever preferred position relative\n   * to the origin fits on-screen.\n   * @docs-private\n   */\n  apply(): void {\n    this._positionStrategy.apply();\n  }\n\n  /**\n   * Re-positions the overlay element with the trigger in its last calculated position,\n   * even if a position higher in the \"preferred positions\" list would now fit. This\n   * allows one to re-align the panel without changing the orientation of the panel.\n   */\n  recalculateLastPosition(): void {\n    this._positionStrategy.reapplyLastPosition();\n  }\n\n  /**\n   * Sets the list of Scrollable containers that host the origin element so that\n   * on reposition we can evaluate if it or the overlay has been clipped or outside view. Every\n   * Scrollable must be an ancestor element of the strategy's origin element.\n   */\n  withScrollableContainers(scrollables: CdkScrollable[]) {\n    this._positionStrategy.withScrollableContainers(scrollables);\n  }\n\n  /**\n   * Adds a new preferred fallback position.\n   * @param originPos\n   * @param overlayPos\n   */\n  withFallbackPosition(\n      originPos: OriginConnectionPosition,\n      overlayPos: OverlayConnectionPosition,\n      offsetX?: number,\n      offsetY?: number): this {\n\n    const position = new ConnectionPositionPair(originPos, overlayPos, offsetX, offsetY);\n    this._preferredPositions.push(position);\n    this._positionStrategy.withPositions(this._preferredPositions);\n    return this;\n  }\n\n  /**\n   * Sets the layout direction so the overlay's position can be adjusted to match.\n   * @param dir New layout direction.\n   */\n  withDirection(dir: 'ltr' | 'rtl'): this {\n    // Since the direction might be declared before the strategy is attached,\n    // we save the value in a temporary property and we'll transfer it to the\n    // overlay ref on attachment.\n    if (this._overlayRef) {\n      this._overlayRef.setDirection(dir);\n    } else {\n      this._direction = dir;\n    }\n\n    return this;\n  }\n\n  /**\n   * Sets an offset for the overlay's connection point on the x-axis\n   * @param offset New offset in the X axis.\n   */\n  withOffsetX(offset: number): this {\n    this._positionStrategy.withDefaultOffsetX(offset);\n    return this;\n  }\n\n  /**\n   * Sets an offset for the overlay's connection point on the y-axis\n   * @param  offset New offset in the Y axis.\n   */\n  withOffsetY(offset: number): this {\n    this._positionStrategy.withDefaultOffsetY(offset);\n    return this;\n  }\n\n  /**\n   * Sets whether the overlay's position should be locked in after it is positioned\n   * initially. When an overlay is locked in, it won't attempt to reposition itself\n   * when the position is re-applied (e.g. when the user scrolls away).\n   * @param isLocked Whether the overlay should locked in.\n   */\n  withLockedPosition(isLocked: boolean): this {\n    this._positionStrategy.withLockedPosition(isLocked);\n    return this;\n  }\n\n  /**\n   * Overwrites the current set of positions with an array of new ones.\n   * @param positions Position pairs to be set on the strategy.\n   */\n  withPositions(positions: ConnectionPositionPair[]): this {\n    this._preferredPositions = positions.slice();\n    this._positionStrategy.withPositions(this._preferredPositions);\n    return this;\n  }\n\n  /**\n   * Sets the origin element, relative to which to position the overlay.\n   * @param origin Reference to the new origin element.\n   */\n  setOrigin(origin: ElementRef): this {\n    this._positionStrategy.setOrigin(origin);\n    return this;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {PositionStrategy} from './position-strategy';\nimport {OverlayReference} from '../overlay-reference';\n\n/** Class to be added to the overlay pane wrapper. */\nconst wrapperClass = 'cdk-global-overlay-wrapper';\n\n/**\n * A strategy for positioning overlays. Using this strategy, an overlay is given an\n * explicit position relative to the browser's viewport. We use flexbox, instead of\n * transforms, in order to avoid issues with subpixel rendering which can cause the\n * element to become blurry.\n */\nexport class GlobalPositionStrategy implements PositionStrategy {\n  /** The overlay to which this strategy is attached. */\n  private _overlayRef: OverlayReference;\n  private _cssPosition: string = 'static';\n  private _topOffset: string = '';\n  private _bottomOffset: string = '';\n  private _leftOffset: string = '';\n  private _rightOffset: string = '';\n  private _alignItems: string = '';\n  private _justifyContent: string = '';\n  private _width: string = '';\n  private _height: string = '';\n  private _isDisposed: boolean;\n\n  attach(overlayRef: OverlayReference): void {\n    const config = overlayRef.getConfig();\n\n    this._overlayRef = overlayRef;\n\n    if (this._width && !config.width) {\n      overlayRef.updateSize({width: this._width});\n    }\n\n    if (this._height && !config.height) {\n      overlayRef.updateSize({height: this._height});\n    }\n\n    overlayRef.hostElement.classList.add(wrapperClass);\n    this._isDisposed = false;\n  }\n\n  /**\n   * Sets the top position of the overlay. Clears any previously set vertical position.\n   * @param value New top offset.\n   */\n  top(value: string = ''): this {\n    this._bottomOffset = '';\n    this._topOffset = value;\n    this._alignItems = 'flex-start';\n    return this;\n  }\n\n  /**\n   * Sets the left position of the overlay. Clears any previously set horizontal position.\n   * @param value New left offset.\n   */\n  left(value: string = ''): this {\n    this._rightOffset = '';\n    this._leftOffset = value;\n    this._justifyContent = 'flex-start';\n    return this;\n  }\n\n  /**\n   * Sets the bottom position of the overlay. Clears any previously set vertical position.\n   * @param value New bottom offset.\n   */\n  bottom(value: string = ''): this {\n    this._topOffset = '';\n    this._bottomOffset = value;\n    this._alignItems = 'flex-end';\n    return this;\n  }\n\n  /**\n   * Sets the right position of the overlay. Clears any previously set horizontal position.\n   * @param value New right offset.\n   */\n  right(value: string = ''): this {\n    this._leftOffset = '';\n    this._rightOffset = value;\n    this._justifyContent = 'flex-end';\n    return this;\n  }\n\n  /**\n   * Sets the overlay width and clears any previously set width.\n   * @param value New width for the overlay\n   * @deprecated Pass the `width` through the `OverlayConfig`.\n   * @breaking-change 8.0.0\n   */\n  width(value: string = ''): this {\n    if (this._overlayRef) {\n      this._overlayRef.updateSize({width: value});\n    } else {\n      this._width = value;\n    }\n\n    return this;\n  }\n\n  /**\n   * Sets the overlay height and clears any previously set height.\n   * @param value New height for the overlay\n   * @deprecated Pass the `height` through the `OverlayConfig`.\n   * @breaking-change 8.0.0\n   */\n  height(value: string = ''): this {\n    if (this._overlayRef) {\n      this._overlayRef.updateSize({height: value});\n    } else {\n      this._height = value;\n    }\n\n    return this;\n  }\n\n  /**\n   * Centers the overlay horizontally with an optional offset.\n   * Clears any previously set horizontal position.\n   *\n   * @param offset Overlay offset from the horizontal center.\n   */\n  centerHorizontally(offset: string = ''): this {\n    this.left(offset);\n    this._justifyContent = 'center';\n    return this;\n  }\n\n  /**\n   * Centers the overlay vertically with an optional offset.\n   * Clears any previously set vertical position.\n   *\n   * @param offset Overlay offset from the vertical center.\n   */\n  centerVertically(offset: string = ''): this {\n    this.top(offset);\n    this._alignItems = 'center';\n    return this;\n  }\n\n  /**\n   * Apply the position to the element.\n   * @docs-private\n   */\n  apply(): void {\n    // Since the overlay ref applies the strategy asynchronously, it could\n    // have been disposed before it ends up being applied. If that is the\n    // case, we shouldn't do anything.\n    if (!this._overlayRef || !this._overlayRef.hasAttached()) {\n      return;\n    }\n\n    const styles = this._overlayRef.overlayElement.style;\n    const parentStyles = this._overlayRef.hostElement.style;\n    const config = this._overlayRef.getConfig();\n    const {width, height, maxWidth, maxHeight} = config;\n    const shouldBeFlushHorizontally = (width === '100%' || width === '100vw') &&\n                                      (!maxWidth || maxWidth === '100%' || maxWidth === '100vw');\n    const shouldBeFlushVertically = (height === '100%' || height === '100vh') &&\n                                    (!maxHeight || maxHeight === '100%' || maxHeight === '100vh');\n\n    styles.position = this._cssPosition;\n    styles.marginLeft = shouldBeFlushHorizontally ? '0' : this._leftOffset;\n    styles.marginTop = shouldBeFlushVertically ? '0' : this._topOffset;\n    styles.marginBottom = this._bottomOffset;\n    styles.marginRight = this._rightOffset;\n\n    if (shouldBeFlushHorizontally) {\n      parentStyles.justifyContent = 'flex-start';\n    } else if (this._justifyContent === 'center') {\n      parentStyles.justifyContent = 'center';\n    } else if (this._overlayRef.getConfig().direction === 'rtl') {\n      // In RTL the browser will invert `flex-start` and `flex-end` automatically, but we\n      // don't want that because our positioning is explicitly `left` and `right`, hence\n      // why we do another inversion to ensure that the overlay stays in the same position.\n      // TODO: reconsider this if we add `start` and `end` methods.\n      if (this._justifyContent === 'flex-start') {\n        parentStyles.justifyContent = 'flex-end';\n      } else if (this._justifyContent === 'flex-end') {\n        parentStyles.justifyContent = 'flex-start';\n      }\n    } else {\n      parentStyles.justifyContent = this._justifyContent;\n    }\n\n    parentStyles.alignItems = shouldBeFlushVertically ? 'flex-start' : this._alignItems;\n  }\n\n  /**\n   * Cleans up the DOM changes from the position strategy.\n   * @docs-private\n   */\n  dispose(): void {\n    if (this._isDisposed || !this._overlayRef) {\n      return;\n    }\n\n    const styles = this._overlayRef.overlayElement.style;\n    const parent = this._overlayRef.hostElement;\n    const parentStyles = parent.style;\n\n    parent.classList.remove(wrapperClass);\n    parentStyles.justifyContent = parentStyles.alignItems = styles.marginTop =\n      styles.marginBottom = styles.marginLeft = styles.marginRight = styles.position = '';\n\n    this._overlayRef = null!;\n    this._isDisposed = true;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Platform} from '@angular/cdk/platform';\nimport {ViewportRuler} from '@angular/cdk/scrolling';\nimport {DOCUMENT} from '@angular/common';\nimport {ElementRef, Inject, Injectable} from '@angular/core';\n\nimport {OverlayContainer} from '../overlay-container';\n\nimport {OriginConnectionPosition, OverlayConnectionPosition} from './connected-position';\nimport {ConnectedPositionStrategy} from './connected-position-strategy';\nimport {\n  FlexibleConnectedPositionStrategy,\n  FlexibleConnectedPositionStrategyOrigin,\n} from './flexible-connected-position-strategy';\nimport {GlobalPositionStrategy} from './global-position-strategy';\n\n\n/** Builder for overlay position strategy. */\n@Injectable({providedIn: 'root'})\nexport class OverlayPositionBuilder {\n  constructor(\n      private _viewportRuler: ViewportRuler, @Inject(DOCUMENT) private _document: any,\n      private _platform: Platform, private _overlayContainer: OverlayContainer) {}\n\n  /**\n   * Creates a global position strategy.\n   */\n  global(): GlobalPositionStrategy {\n    return new GlobalPositionStrategy();\n  }\n\n  /**\n   * Creates a relative position strategy.\n   * @param elementRef\n   * @param originPos\n   * @param overlayPos\n   * @deprecated Use `flexibleConnectedTo` instead.\n   * @breaking-change 8.0.0\n   */\n  connectedTo(\n      elementRef: ElementRef,\n      originPos: OriginConnectionPosition,\n      overlayPos: OverlayConnectionPosition): ConnectedPositionStrategy {\n    return new ConnectedPositionStrategy(\n        originPos, overlayPos, elementRef, this._viewportRuler, this._document, this._platform,\n        this._overlayContainer);\n  }\n\n  /**\n   * Creates a flexible position strategy.\n   * @param origin Origin relative to which to position the overlay.\n   */\n  flexibleConnectedTo(origin: FlexibleConnectedPositionStrategyOrigin):\n    FlexibleConnectedPositionStrategy {\n    return new FlexibleConnectedPositionStrategy(origin, this._viewportRuler, this._document,\n        this._platform, this._overlayContainer);\n  }\n\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directionality} from '@angular/cdk/bidi';\nimport {DomPortalOutlet} from '@angular/cdk/portal';\nimport {DOCUMENT, Location} from '@angular/common';\nimport {\n  ApplicationRef,\n  ComponentFactoryResolver,\n  Inject,\n  Injectable,\n  Injector,\n  NgZone,\n} from '@angular/core';\nimport {OverlayKeyboardDispatcher} from './dispatchers/overlay-keyboard-dispatcher';\nimport {OverlayOutsideClickDispatcher} from './dispatchers/overlay-outside-click-dispatcher';\nimport {OverlayConfig} from './overlay-config';\nimport {OverlayContainer} from './overlay-container';\nimport {OverlayRef} from './overlay-ref';\nimport {OverlayPositionBuilder} from './position/overlay-position-builder';\nimport {ScrollStrategyOptions} from './scroll/index';\n\n\n/** Next overlay unique ID. */\nlet nextUniqueId = 0;\n\n// Note that Overlay is *not* scoped to the app root because of the ComponentFactoryResolver\n// which needs to be different depending on where OverlayModule is imported.\n\n/**\n * Service to create Overlays. Overlays are dynamically added pieces of floating UI, meant to be\n * used as a low-level building block for other components. Dialogs, tooltips, menus,\n * selects, etc. can all be built using overlays. The service should primarily be used by authors\n * of re-usable components rather than developers building end-user applications.\n *\n * An overlay *is* a PortalOutlet, so any kind of Portal can be loaded into one.\n */\n@Injectable()\nexport class Overlay {\n  private _appRef: ApplicationRef;\n\n  constructor(\n              /** Scrolling strategies that can be used when creating an overlay. */\n              public scrollStrategies: ScrollStrategyOptions,\n              private _overlayContainer: OverlayContainer,\n              private _componentFactoryResolver: ComponentFactoryResolver,\n              private _positionBuilder: OverlayPositionBuilder,\n              private _keyboardDispatcher: OverlayKeyboardDispatcher,\n              private _injector: Injector,\n              private _ngZone: NgZone,\n              @Inject(DOCUMENT) private _document: any,\n              private _directionality: Directionality,\n              // @breaking-change 8.0.0 `_location` parameter to be made required.\n              private _location?: Location,\n              // @breaking-change 9.0.0 `_outsideClickDispatcher` parameter to be made required.\n              private _outsideClickDispatcher?: OverlayOutsideClickDispatcher) { }\n\n  /**\n   * Creates an overlay.\n   * @param config Configuration applied to the overlay.\n   * @returns Reference to the created overlay.\n   */\n  create(config?: OverlayConfig): OverlayRef {\n    const host = this._createHostElement();\n    const pane = this._createPaneElement(host);\n    const portalOutlet = this._createPortalOutlet(pane);\n    const overlayConfig = new OverlayConfig(config);\n\n    overlayConfig.direction = overlayConfig.direction || this._directionality.value;\n\n    return new OverlayRef(portalOutlet, host, pane, overlayConfig, this._ngZone,\n      this._keyboardDispatcher, this._document, this._location, this._outsideClickDispatcher);\n  }\n\n  /**\n   * Gets a position builder that can be used, via fluent API,\n   * to construct and configure a position strategy.\n   * @returns An overlay position builder.\n   */\n  position(): OverlayPositionBuilder {\n    return this._positionBuilder;\n  }\n\n  /**\n   * Creates the DOM element for an overlay and appends it to the overlay container.\n   * @returns Newly-created pane element\n   */\n  private _createPaneElement(host: HTMLElement): HTMLElement {\n    const pane = this._document.createElement('div');\n\n    pane.id = `cdk-overlay-${nextUniqueId++}`;\n    pane.classList.add('cdk-overlay-pane');\n    host.appendChild(pane);\n\n    return pane;\n  }\n\n  /**\n   * Creates the host element that wraps around an overlay\n   * and can be used for advanced positioning.\n   * @returns Newly-create host element.\n   */\n  private _createHostElement(): HTMLElement {\n    const host = this._document.createElement('div');\n    this._overlayContainer.getContainerElement().appendChild(host);\n    return host;\n  }\n\n  /**\n   * Create a DomPortalOutlet into which the overlay content can be loaded.\n   * @param pane The DOM element to turn into a portal outlet.\n   * @returns A portal outlet for the given DOM element.\n   */\n  private _createPortalOutlet(pane: HTMLElement): DomPortalOutlet {\n    // We have to resolve the ApplicationRef later in order to allow people\n    // to use overlay-based providers during app initialization.\n    if (!this._appRef) {\n      this._appRef = this._injector.get<ApplicationRef>(ApplicationRef);\n    }\n\n    return new DomPortalOutlet(pane, this._componentFactoryResolver, this._appRef, this._injector,\n                               this._document);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Direction, Directionality} from '@angular/cdk/bidi';\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {ESCAPE, hasModifierKey} from '@angular/cdk/keycodes';\nimport {TemplatePortal} from '@angular/cdk/portal';\nimport {\n  Directive,\n  ElementRef,\n  EventEmitter,\n  Inject,\n  InjectionToken,\n  Input,\n  OnChanges,\n  OnDestroy,\n  Optional,\n  Output,\n  SimpleChanges,\n  TemplateRef,\n  ViewContainerRef,\n} from '@angular/core';\nimport {Subscription} from 'rxjs';\nimport {takeWhile} from 'rxjs/operators';\nimport {Overlay} from './overlay';\nimport {OverlayConfig} from './overlay-config';\nimport {OverlayRef} from './overlay-ref';\nimport {ConnectedOverlayPositionChange} from './position/connected-position';\nimport {\n  ConnectedPosition,\n  FlexibleConnectedPositionStrategy,\n} from './position/flexible-connected-position-strategy';\nimport {\n  RepositionScrollStrategy,\n  RepositionScrollStrategyConfig,\n  ScrollStrategy,\n} from './scroll/index';\n\n\n/** Default set of positions for the overlay. Follows the behavior of a dropdown. */\nconst defaultPositionList: ConnectedPosition[] = [\n  {\n    originX: 'start',\n    originY: 'bottom',\n    overlayX: 'start',\n    overlayY: 'top'\n  },\n  {\n    originX: 'start',\n    originY: 'top',\n    overlayX: 'start',\n    overlayY: 'bottom'\n  },\n  {\n    originX: 'end',\n    originY: 'top',\n    overlayX: 'end',\n    overlayY: 'bottom'\n  },\n  {\n    originX: 'end',\n    originY: 'bottom',\n    overlayX: 'end',\n    overlayY: 'top'\n  }\n];\n\n/** Injection token that determines the scroll handling while the connected overlay is open. */\nexport const CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY =\n    new InjectionToken<() => ScrollStrategy>('cdk-connected-overlay-scroll-strategy');\n\n/** @docs-private @deprecated @breaking-change 8.0.0 */\nexport function CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_FACTORY(overlay: Overlay):\n  () => ScrollStrategy {\n  return (config?: RepositionScrollStrategyConfig) => overlay.scrollStrategies.reposition(config);\n}\n\n/**\n * Directive applied to an element to make it usable as an origin for an Overlay using a\n * ConnectedPositionStrategy.\n */\n@Directive({\n  selector: '[cdk-overlay-origin], [overlay-origin], [cdkOverlayOrigin]',\n  exportAs: 'cdkOverlayOrigin',\n})\nexport class CdkOverlayOrigin {\n  constructor(\n      /** Reference to the element on which the directive is applied. */\n      public elementRef: ElementRef) { }\n}\n\n\n/**\n * Directive to facilitate declarative creation of an\n * Overlay using a FlexibleConnectedPositionStrategy.\n */\n@Directive({\n  selector: '[cdk-connected-overlay], [connected-overlay], [cdkConnectedOverlay]',\n  exportAs: 'cdkConnectedOverlay'\n})\nexport class CdkConnectedOverlay implements OnDestroy, OnChanges {\n  private _overlayRef: OverlayRef;\n  private _templatePortal: TemplatePortal;\n  private _hasBackdrop = false;\n  private _lockPosition = false;\n  private _growAfterOpen = false;\n  private _flexibleDimensions = false;\n  private _push = false;\n  private _backdropSubscription = Subscription.EMPTY;\n  private _attachSubscription = Subscription.EMPTY;\n  private _detachSubscription = Subscription.EMPTY;\n  private _positionSubscription = Subscription.EMPTY;\n  private _offsetX: number;\n  private _offsetY: number;\n  private _position: FlexibleConnectedPositionStrategy;\n  private _scrollStrategyFactory: () => ScrollStrategy;\n\n  /** Origin for the connected overlay. */\n  @Input('cdkConnectedOverlayOrigin') origin: CdkOverlayOrigin;\n\n  /** Registered connected position pairs. */\n  @Input('cdkConnectedOverlayPositions') positions: ConnectedPosition[];\n\n  /**\n   * This input overrides the positions input if specified. It lets users pass\n   * in arbitrary positioning strategies.\n   */\n  @Input('cdkConnectedOverlayPositionStrategy') positionStrategy: FlexibleConnectedPositionStrategy;\n\n  /** The offset in pixels for the overlay connection point on the x-axis */\n  @Input('cdkConnectedOverlayOffsetX')\n  get offsetX(): number { return this._offsetX; }\n  set offsetX(offsetX: number) {\n    this._offsetX = offsetX;\n\n    if (this._position) {\n      this._updatePositionStrategy(this._position);\n    }\n  }\n\n  /** The offset in pixels for the overlay connection point on the y-axis */\n  @Input('cdkConnectedOverlayOffsetY')\n  get offsetY() { return this._offsetY; }\n  set offsetY(offsetY: number) {\n    this._offsetY = offsetY;\n\n    if (this._position) {\n      this._updatePositionStrategy(this._position);\n    }\n  }\n\n  /** The width of the overlay panel. */\n  @Input('cdkConnectedOverlayWidth') width: number | string;\n\n  /** The height of the overlay panel. */\n  @Input('cdkConnectedOverlayHeight') height: number | string;\n\n  /** The min width of the overlay panel. */\n  @Input('cdkConnectedOverlayMinWidth') minWidth: number | string;\n\n  /** The min height of the overlay panel. */\n  @Input('cdkConnectedOverlayMinHeight') minHeight: number | string;\n\n  /** The custom class to be set on the backdrop element. */\n  @Input('cdkConnectedOverlayBackdropClass') backdropClass: string;\n\n  /** The custom class to add to the overlay pane element. */\n  @Input('cdkConnectedOverlayPanelClass') panelClass: string | string[];\n\n  /** Margin between the overlay and the viewport edges. */\n  @Input('cdkConnectedOverlayViewportMargin') viewportMargin: number = 0;\n\n  /** Strategy to be used when handling scroll events while the overlay is open. */\n  @Input('cdkConnectedOverlayScrollStrategy') scrollStrategy: ScrollStrategy;\n\n  /** Whether the overlay is open. */\n  @Input('cdkConnectedOverlayOpen') open: boolean = false;\n\n  /** CSS selector which to set the transform origin. */\n  @Input('cdkConnectedOverlayTransformOriginOn') transformOriginSelector: string;\n\n  /** Whether or not the overlay should attach a backdrop. */\n  @Input('cdkConnectedOverlayHasBackdrop')\n  get hasBackdrop() { return this._hasBackdrop; }\n  set hasBackdrop(value: any) { this._hasBackdrop = coerceBooleanProperty(value); }\n\n  /** Whether or not the overlay should be locked when scrolling. */\n  @Input('cdkConnectedOverlayLockPosition')\n  get lockPosition() { return this._lockPosition; }\n  set lockPosition(value: any) { this._lockPosition = coerceBooleanProperty(value); }\n\n  /** Whether the overlay's width and height can be constrained to fit within the viewport. */\n  @Input('cdkConnectedOverlayFlexibleDimensions')\n  get flexibleDimensions() { return this._flexibleDimensions; }\n  set flexibleDimensions(value: boolean) {\n    this._flexibleDimensions = coerceBooleanProperty(value);\n  }\n\n  /** Whether the overlay can grow after the initial open when flexible positioning is turned on. */\n  @Input('cdkConnectedOverlayGrowAfterOpen')\n  get growAfterOpen() { return this._growAfterOpen; }\n  set growAfterOpen(value: boolean) { this._growAfterOpen = coerceBooleanProperty(value); }\n\n  /** Whether the overlay can be pushed on-screen if none of the provided positions fit. */\n  @Input('cdkConnectedOverlayPush')\n  get push() { return this._push; }\n  set push(value: boolean) { this._push = coerceBooleanProperty(value); }\n\n  /** Event emitted when the backdrop is clicked. */\n  @Output() backdropClick = new EventEmitter<MouseEvent>();\n\n  /** Event emitted when the position has changed. */\n  @Output() positionChange = new EventEmitter<ConnectedOverlayPositionChange>();\n\n  /** Event emitted when the overlay has been attached. */\n  @Output() attach = new EventEmitter<void>();\n\n  /** Event emitted when the overlay has been detached. */\n  @Output() detach = new EventEmitter<void>();\n\n  /** Emits when there are keyboard events that are targeted at the overlay. */\n  @Output() overlayKeydown = new EventEmitter<KeyboardEvent>();\n\n  /** Emits when there are mouse outside click events that are targeted at the overlay. */\n  @Output() overlayOutsideClick = new EventEmitter<MouseEvent>();\n\n  // TODO(jelbourn): inputs for size, scroll behavior, animation, etc.\n\n  constructor(\n      private _overlay: Overlay,\n      templateRef: TemplateRef<any>,\n      viewContainerRef: ViewContainerRef,\n      @Inject(CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY) scrollStrategyFactory: any,\n      @Optional() private _dir: Directionality) {\n    this._templatePortal = new TemplatePortal(templateRef, viewContainerRef);\n    this._scrollStrategyFactory = scrollStrategyFactory;\n    this.scrollStrategy = this._scrollStrategyFactory();\n  }\n\n  /** The associated overlay reference. */\n  get overlayRef(): OverlayRef {\n    return this._overlayRef;\n  }\n\n  /** The element's layout direction. */\n  get dir(): Direction {\n    return this._dir ? this._dir.value : 'ltr';\n  }\n\n  ngOnDestroy() {\n    this._attachSubscription.unsubscribe();\n    this._detachSubscription.unsubscribe();\n    this._backdropSubscription.unsubscribe();\n    this._positionSubscription.unsubscribe();\n\n    if (this._overlayRef) {\n      this._overlayRef.dispose();\n    }\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    if (this._position) {\n      this._updatePositionStrategy(this._position);\n      this._overlayRef.updateSize({\n        width: this.width,\n        minWidth: this.minWidth,\n        height: this.height,\n        minHeight: this.minHeight,\n      });\n\n      if (changes['origin'] && this.open) {\n        this._position.apply();\n      }\n    }\n\n    if (changes['open']) {\n      this.open ? this._attachOverlay() : this._detachOverlay();\n    }\n  }\n\n  /** Creates an overlay */\n  private _createOverlay() {\n    if (!this.positions || !this.positions.length) {\n      this.positions = defaultPositionList;\n    }\n\n    const overlayRef = this._overlayRef = this._overlay.create(this._buildConfig());\n    this._attachSubscription = overlayRef.attachments().subscribe(() => this.attach.emit());\n    this._detachSubscription = overlayRef.detachments().subscribe(() => this.detach.emit());\n    overlayRef.keydownEvents().subscribe((event: KeyboardEvent) => {\n      this.overlayKeydown.next(event);\n\n      if (event.keyCode === ESCAPE && !hasModifierKey(event)) {\n        event.preventDefault();\n        this._detachOverlay();\n      }\n    });\n\n    this._overlayRef.outsidePointerEvents().subscribe((event: MouseEvent) => {\n      this.overlayOutsideClick.next(event);\n    });\n  }\n\n  /** Builds the overlay config based on the directive's inputs */\n  private _buildConfig(): OverlayConfig {\n    const positionStrategy = this._position =\n      this.positionStrategy || this._createPositionStrategy();\n    const overlayConfig = new OverlayConfig({\n      direction: this._dir,\n      positionStrategy,\n      scrollStrategy: this.scrollStrategy,\n      hasBackdrop: this.hasBackdrop\n    });\n\n    if (this.width || this.width === 0) {\n      overlayConfig.width = this.width;\n    }\n\n    if (this.height || this.height === 0) {\n      overlayConfig.height = this.height;\n    }\n\n    if (this.minWidth || this.minWidth === 0) {\n      overlayConfig.minWidth = this.minWidth;\n    }\n\n    if (this.minHeight || this.minHeight === 0) {\n      overlayConfig.minHeight = this.minHeight;\n    }\n\n    if (this.backdropClass) {\n      overlayConfig.backdropClass = this.backdropClass;\n    }\n\n    if (this.panelClass) {\n      overlayConfig.panelClass = this.panelClass;\n    }\n\n    return overlayConfig;\n  }\n\n  /** Updates the state of a position strategy, based on the values of the directive inputs. */\n  private _updatePositionStrategy(positionStrategy: FlexibleConnectedPositionStrategy) {\n    const positions: ConnectedPosition[] = this.positions.map(currentPosition => ({\n      originX: currentPosition.originX,\n      originY: currentPosition.originY,\n      overlayX: currentPosition.overlayX,\n      overlayY: currentPosition.overlayY,\n      offsetX: currentPosition.offsetX || this.offsetX,\n      offsetY: currentPosition.offsetY || this.offsetY,\n      panelClass: currentPosition.panelClass || undefined,\n    }));\n\n    return positionStrategy\n      .setOrigin(this.origin.elementRef)\n      .withPositions(positions)\n      .withFlexibleDimensions(this.flexibleDimensions)\n      .withPush(this.push)\n      .withGrowAfterOpen(this.growAfterOpen)\n      .withViewportMargin(this.viewportMargin)\n      .withLockedPosition(this.lockPosition)\n      .withTransformOriginOn(this.transformOriginSelector);\n  }\n\n  /** Returns the position strategy of the overlay to be set on the overlay config */\n  private _createPositionStrategy(): FlexibleConnectedPositionStrategy {\n    const strategy = this._overlay.position().flexibleConnectedTo(this.origin.elementRef);\n    this._updatePositionStrategy(strategy);\n    return strategy;\n  }\n\n  /** Attaches the overlay and subscribes to backdrop clicks if backdrop exists */\n  private _attachOverlay() {\n    if (!this._overlayRef) {\n      this._createOverlay();\n    } else {\n      // Update the overlay size, in case the directive's inputs have changed\n      this._overlayRef.getConfig().hasBackdrop = this.hasBackdrop;\n    }\n\n    if (!this._overlayRef.hasAttached()) {\n      this._overlayRef.attach(this._templatePortal);\n    }\n\n    if (this.hasBackdrop) {\n      this._backdropSubscription = this._overlayRef.backdropClick().subscribe(event => {\n        this.backdropClick.emit(event);\n      });\n    } else {\n      this._backdropSubscription.unsubscribe();\n    }\n\n    this._positionSubscription.unsubscribe();\n\n    // Only subscribe to `positionChanges` if requested, because putting\n    // together all the information for it can be expensive.\n    if (this.positionChange.observers.length > 0) {\n      this._positionSubscription = this._position.positionChanges\n        .pipe(takeWhile(() => this.positionChange.observers.length > 0))\n        .subscribe(position => {\n          this.positionChange.emit(position);\n\n          if (this.positionChange.observers.length === 0) {\n            this._positionSubscription.unsubscribe();\n          }\n        });\n    }\n  }\n\n  /** Detaches the overlay and unsubscribes to backdrop clicks if backdrop exists */\n  private _detachOverlay() {\n    if (this._overlayRef) {\n      this._overlayRef.detach();\n    }\n\n    this._backdropSubscription.unsubscribe();\n    this._positionSubscription.unsubscribe();\n  }\n\n  static ngAcceptInputType_hasBackdrop: BooleanInput;\n  static ngAcceptInputType_lockPosition: BooleanInput;\n  static ngAcceptInputType_flexibleDimensions: BooleanInput;\n  static ngAcceptInputType_growAfterOpen: BooleanInput;\n  static ngAcceptInputType_push: BooleanInput;\n}\n\n\n/** @docs-private */\nexport function CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER_FACTORY(overlay: Overlay):\n    () => RepositionScrollStrategy {\n  return () => overlay.scrollStrategies.reposition();\n}\n\n/** @docs-private */\nexport const CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER = {\n  provide: CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY,\n  deps: [Overlay],\n  useFactory: CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER_FACTORY,\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {BidiModule} from '@angular/cdk/bidi';\nimport {PortalModule} from '@angular/cdk/portal';\nimport {ScrollingModule} from '@angular/cdk/scrolling';\nimport {NgModule, Provider} from '@angular/core';\nimport {OVERLAY_KEYBOARD_DISPATCHER_PROVIDER} from './dispatchers/overlay-keyboard-dispatcher';\nimport {Overlay} from './overlay';\nimport {OVERLAY_CONTAINER_PROVIDER} from './overlay-container';\nimport {\n  CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER,\n  CdkConnectedOverlay,\n  CdkOverlayOrigin,\n} from './overlay-directives';\nimport {OverlayPositionBuilder} from './position/overlay-position-builder';\n\n\n@NgModule({\n  imports: [BidiModule, PortalModule, ScrollingModule],\n  exports: [CdkConnectedOverlay, CdkOverlayOrigin, ScrollingModule],\n  declarations: [CdkConnectedOverlay, CdkOverlayOrigin],\n  providers: [\n    Overlay,\n    CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER,\n  ],\n})\nexport class OverlayModule {}\n\n\n/**\n * @deprecated Use `OverlayModule` instead.\n * @breaking-change 8.0.0\n * @docs-private\n */\nexport const OVERLAY_PROVIDERS: Provider[] = [\n  Overlay,\n  OverlayPositionBuilder,\n  OVERLAY_KEYBOARD_DISPATCHER_PROVIDER,\n  OVERLAY_CONTAINER_PROVIDER,\n  CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER,\n];\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport {OverlayOutsideClickDispatcher} from './overlay-outside-click-dispatcher';\nexport {OverlayKeyboardDispatcher} from './overlay-keyboard-dispatcher';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable, Inject, OnDestroy} from '@angular/core';\nimport {OverlayContainer} from './overlay-container';\nimport {DOCUMENT} from '@angular/common';\nimport {Platform} from '@angular/cdk/platform';\n\n\n/**\n * Alternative to OverlayContainer that supports correct displaying of overlay elements in\n * Fullscreen mode\n * https://developer.mozilla.org/en-US/docs/Web/API/Element/requestFullScreen\n *\n * Should be provided in the root component.\n */\n@Injectable({providedIn: 'root'})\nexport class FullscreenOverlayContainer extends OverlayContainer implements OnDestroy {\n  private _fullScreenEventName: string | undefined;\n  private _fullScreenListener: () => void;\n\n  constructor(\n    @Inject(DOCUMENT) _document: any,\n    /**\n     * @deprecated `platform` parameter to become required.\n     * @breaking-change 10.0.0\n     */\n    platform?: Platform) {\n    super(_document, platform);\n  }\n\n  ngOnDestroy() {\n    super.ngOnDestroy();\n\n    if (this._fullScreenEventName && this._fullScreenListener) {\n      this._document.removeEventListener(this._fullScreenEventName, this._fullScreenListener);\n    }\n  }\n\n  protected _createContainer(): void {\n    super._createContainer();\n    this._adjustParentForFullscreenChange();\n    this._addFullscreenChangeListener(() => this._adjustParentForFullscreenChange());\n  }\n\n  private _adjustParentForFullscreenChange(): void {\n    if (!this._containerElement) {\n      return;\n    }\n\n    const fullscreenElement = this.getFullscreenElement();\n    const parent = fullscreenElement || this._document.body;\n    parent.appendChild(this._containerElement);\n  }\n\n  private _addFullscreenChangeListener(fn: () => void) {\n    const eventName = this._getEventName();\n\n    if (eventName) {\n      if (this._fullScreenListener) {\n        this._document.removeEventListener(eventName, this._fullScreenListener);\n      }\n\n      this._document.addEventListener(eventName, fn);\n      this._fullScreenListener = fn;\n    }\n  }\n\n  private _getEventName(): string | undefined {\n    if (!this._fullScreenEventName) {\n      const _document = this._document as any;\n\n      if (_document.fullscreenEnabled) {\n        this._fullScreenEventName = 'fullscreenchange';\n      } else if (_document.webkitFullscreenEnabled) {\n        this._fullScreenEventName = 'webkitfullscreenchange';\n      } else if (_document.mozFullScreenEnabled) {\n        this._fullScreenEventName = 'mozfullscreenchange';\n      } else if (_document.msFullscreenEnabled) {\n        this._fullScreenEventName = 'MSFullscreenChange';\n      }\n    }\n\n    return this._fullScreenEventName;\n  }\n\n  /**\n   * When the page is put into fullscreen mode, a specific element is specified.\n   * Only that element and its children are visible when in fullscreen mode.\n   */\n  getFullscreenElement(): Element {\n    const _document = this._document as any;\n\n    return _document.fullscreenElement ||\n           _document.webkitFullscreenElement ||\n           _document.mozFullScreenElement ||\n           _document.msFullscreenElement ||\n           null;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './overlay-config';\nexport * from './position/connected-position';\nexport * from './scroll/index';\nexport * from './overlay-module';\nexport * from './dispatchers/index';\nexport {Overlay} from './overlay';\nexport {OverlayContainer} from './overlay-container';\nexport {CdkOverlayOrigin, CdkConnectedOverlay} from './overlay-directives';\nexport {FullscreenOverlayContainer} from './fullscreen-overlay-container';\nexport {OverlayRef, OverlaySizeConfig} from './overlay-ref';\nexport {ViewportRuler} from '@angular/cdk/scrolling';\nexport {ComponentType} from '@angular/cdk/portal';\nexport {OverlayPositionBuilder} from './position/overlay-position-builder';\n\n// Export pre-defined position strategies and interface to build custom ones.\nexport {PositionStrategy} from './position/position-strategy';\nexport {GlobalPositionStrategy} from './position/global-position-strategy';\nexport {ConnectedPositionStrategy} from './position/connected-position-strategy';\nexport {\n  ConnectedPosition,\n  FlexibleConnectedPositionStrategy,\n  FlexibleConnectedPositionStrategyOrigin,\n} from './position/flexible-connected-position-strategy';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n\nexport {BaseOverlayDispatcher as ɵangular_material_src_cdk_overlay_overlay_h} from './dispatchers/base-overlay-dispatcher';\nexport {OVERLAY_KEYBOARD_DISPATCHER_PROVIDER as ɵangular_material_src_cdk_overlay_overlay_b,OVERLAY_KEYBOARD_DISPATCHER_PROVIDER_FACTORY as ɵangular_material_src_cdk_overlay_overlay_a} from './dispatchers/overlay-keyboard-dispatcher';\nexport {OVERLAY_CONTAINER_PROVIDER as ɵangular_material_src_cdk_overlay_overlay_d,OVERLAY_CONTAINER_PROVIDER_FACTORY as ɵangular_material_src_cdk_overlay_overlay_c} from './overlay-container';\nexport {CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY as ɵangular_material_src_cdk_overlay_overlay_e,CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER as ɵangular_material_src_cdk_overlay_overlay_g,CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER_FACTORY as ɵangular_material_src_cdk_overlay_overlay_f} from './overlay-directives';","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar subscribeOn_1 = require(\"../../operator/subscribeOn\");\nrxjs_1.Observable.prototype.subscribeOn = subscribeOn_1.subscribeOn;\n//# sourceMappingURL=subscribeOn.js.map","export default function _defineProperty(obj, key, value) {\n  if (key in obj) {\n    Object.defineProperty(obj, key, {\n      value: value,\n      enumerable: true,\n      configurable: true,\n      writable: true\n    });\n  } else {\n    obj[key] = value;\n  }\n\n  return obj;\n}","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar timeoutWith_1 = require(\"../../operator/timeoutWith\");\nrxjs_1.Observable.prototype.timeoutWith = timeoutWith_1.timeoutWith;\n//# sourceMappingURL=timeoutWith.js.map","export default function _setPrototypeOf(o, p) {\n  _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {\n    o.__proto__ = p;\n    return o;\n  };\n\n  return _setPrototypeOf(o, p);\n}","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.combineLatest = rxjs_1.combineLatest;\n//# sourceMappingURL=combineLatest.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar mergeMapTo_1 = require(\"../../operator/mergeMapTo\");\nrxjs_1.Observable.prototype.flatMapTo = mergeMapTo_1.mergeMapTo;\nrxjs_1.Observable.prototype.mergeMapTo = mergeMapTo_1.mergeMapTo;\n//# sourceMappingURL=mergeMapTo.js.map","import { Subject } from '../Subject';\nimport { Subscription } from '../Subscription';\nimport { OuterSubscriber } from '../OuterSubscriber';\nimport { subscribeToResult } from '../util/subscribeToResult';\nexport function windowToggle(openings, closingSelector) {\n    return (source) => source.lift(new WindowToggleOperator(openings, closingSelector));\n}\nclass WindowToggleOperator {\n    constructor(openings, closingSelector) {\n        this.openings = openings;\n        this.closingSelector = closingSelector;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new WindowToggleSubscriber(subscriber, this.openings, this.closingSelector));\n    }\n}\nclass WindowToggleSubscriber extends OuterSubscriber {\n    constructor(destination, openings, closingSelector) {\n        super(destination);\n        this.openings = openings;\n        this.closingSelector = closingSelector;\n        this.contexts = [];\n        this.add(this.openSubscription = subscribeToResult(this, openings, openings));\n    }\n    _next(value) {\n        const { contexts } = this;\n        if (contexts) {\n            const len = contexts.length;\n            for (let i = 0; i < len; i++) {\n                contexts[i].window.next(value);\n            }\n        }\n    }\n    _error(err) {\n        const { contexts } = this;\n        this.contexts = null;\n        if (contexts) {\n            const len = contexts.length;\n            let index = -1;\n            while (++index < len) {\n                const context = contexts[index];\n                context.window.error(err);\n                context.subscription.unsubscribe();\n            }\n        }\n        super._error(err);\n    }\n    _complete() {\n        const { contexts } = this;\n        this.contexts = null;\n        if (contexts) {\n            const len = contexts.length;\n            let index = -1;\n            while (++index < len) {\n                const context = contexts[index];\n                context.window.complete();\n                context.subscription.unsubscribe();\n            }\n        }\n        super._complete();\n    }\n    _unsubscribe() {\n        const { contexts } = this;\n        this.contexts = null;\n        if (contexts) {\n            const len = contexts.length;\n            let index = -1;\n            while (++index < len) {\n                const context = contexts[index];\n                context.window.unsubscribe();\n                context.subscription.unsubscribe();\n            }\n        }\n    }\n    notifyNext(outerValue, innerValue, outerIndex, innerIndex, innerSub) {\n        if (outerValue === this.openings) {\n            let closingNotifier;\n            try {\n                const { closingSelector } = this;\n                closingNotifier = closingSelector(innerValue);\n            }\n            catch (e) {\n                return this.error(e);\n            }\n            const window = new Subject();\n            const subscription = new Subscription();\n            const context = { window, subscription };\n            this.contexts.push(context);\n            const innerSubscription = subscribeToResult(this, closingNotifier, context);\n            if (innerSubscription.closed) {\n                this.closeWindow(this.contexts.length - 1);\n            }\n            else {\n                innerSubscription.context = context;\n                subscription.add(innerSubscription);\n            }\n            this.destination.next(window);\n        }\n        else {\n            this.closeWindow(this.contexts.indexOf(outerValue));\n        }\n    }\n    notifyError(err) {\n        this.error(err);\n    }\n    notifyComplete(inner) {\n        if (inner !== this.openSubscription) {\n            this.closeWindow(this.contexts.indexOf(inner.context));\n        }\n    }\n    closeWindow(index) {\n        if (index === -1) {\n            return;\n        }\n        const { contexts } = this;\n        const context = contexts[index];\n        const { window, subscription } = context;\n        contexts.splice(index, 1);\n        window.complete();\n        subscription.unsubscribe();\n    }\n}\n//# sourceMappingURL=windowToggle.js.map","const EmptyErrorImpl = (() => {\n    function EmptyErrorImpl() {\n        Error.call(this);\n        this.message = 'no elements in sequence';\n        this.name = 'EmptyError';\n        return this;\n    }\n    EmptyErrorImpl.prototype = Object.create(Error.prototype);\n    return EmptyErrorImpl;\n})();\nexport const EmptyError = EmptyErrorImpl;\n//# sourceMappingURL=EmptyError.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar findIndex_1 = require(\"../../operator/findIndex\");\nrxjs_1.Observable.prototype.findIndex = findIndex_1.findIndex;\n//# sourceMappingURL=findIndex.js.map","import { async } from '../scheduler/async';\nimport { isDate } from '../util/isDate';\nimport { SimpleOuterSubscriber, innerSubscribe, SimpleInnerSubscriber } from '../innerSubscribe';\nexport function timeoutWith(due, withObservable, scheduler = async) {\n    return (source) => {\n        let absoluteTimeout = isDate(due);\n        let waitFor = absoluteTimeout ? (+due - scheduler.now()) : Math.abs(due);\n        return source.lift(new TimeoutWithOperator(waitFor, absoluteTimeout, withObservable, scheduler));\n    };\n}\nclass TimeoutWithOperator {\n    constructor(waitFor, absoluteTimeout, withObservable, scheduler) {\n        this.waitFor = waitFor;\n        this.absoluteTimeout = absoluteTimeout;\n        this.withObservable = withObservable;\n        this.scheduler = scheduler;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new TimeoutWithSubscriber(subscriber, this.absoluteTimeout, this.waitFor, this.withObservable, this.scheduler));\n    }\n}\nclass TimeoutWithSubscriber extends SimpleOuterSubscriber {\n    constructor(destination, absoluteTimeout, waitFor, withObservable, scheduler) {\n        super(destination);\n        this.absoluteTimeout = absoluteTimeout;\n        this.waitFor = waitFor;\n        this.withObservable = withObservable;\n        this.scheduler = scheduler;\n        this.scheduleTimeout();\n    }\n    static dispatchTimeout(subscriber) {\n        const { withObservable } = subscriber;\n        subscriber._unsubscribeAndRecycle();\n        subscriber.add(innerSubscribe(withObservable, new SimpleInnerSubscriber(subscriber)));\n    }\n    scheduleTimeout() {\n        const { action } = this;\n        if (action) {\n            this.action = action.schedule(this, this.waitFor);\n        }\n        else {\n            this.add(this.action = this.scheduler.schedule(TimeoutWithSubscriber.dispatchTimeout, this.waitFor, this));\n        }\n    }\n    _next(value) {\n        if (!this.absoluteTimeout) {\n            this.scheduleTimeout();\n        }\n        super._next(value);\n    }\n    _unsubscribe() {\n        this.action = undefined;\n        this.scheduler = null;\n        this.withObservable = null;\n    }\n}\n//# sourceMappingURL=timeoutWith.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.onErrorResumeNext = rxjs_1.onErrorResumeNext;\n//# sourceMappingURL=onErrorResumeNext.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {AnimationEvent, AnimationPlayer, AUTO_STYLE, NoopAnimationPlayer, ɵAnimationGroupPlayer, ɵPRE_STYLE as PRE_STYLE, ɵStyleData} from '@angular/animations';\n\nimport {AnimationStyleNormalizer} from '../../src/dsl/style_normalization/animation_style_normalizer';\nimport {AnimationDriver} from '../../src/render/animation_driver';\n\n// We don't include ambient node types here since @angular/animations/browser\n// is meant to target the browser so technically it should not depend on node\n// types. `process` is just declared locally here as a result.\ndeclare const process: any;\n\nexport function isBrowser(): boolean {\n  return (typeof window !== 'undefined' && typeof window.document !== 'undefined');\n}\n\nexport function isNode(): boolean {\n  // Checking only for `process` isn't enough to identify whether or not we're in a Node\n  // environment, because Webpack by default will polyfill the `process`. While we can discern\n  // that Webpack polyfilled it by looking at `process.browser`, it's very Webpack-specific and\n  // might not be future-proof. Instead we look at the stringified version of `process` which\n  // is `[object process]` in Node and `[object Object]` when polyfilled.\n  return typeof process !== 'undefined' && {}.toString.call(process) === '[object process]';\n}\n\nexport function optimizeGroupPlayer(players: AnimationPlayer[]): AnimationPlayer {\n  switch (players.length) {\n    case 0:\n      return new NoopAnimationPlayer();\n    case 1:\n      return players[0];\n    default:\n      return new ɵAnimationGroupPlayer(players);\n  }\n}\n\nexport function normalizeKeyframes(\n    driver: AnimationDriver, normalizer: AnimationStyleNormalizer, element: any,\n    keyframes: ɵStyleData[], preStyles: ɵStyleData = {},\n    postStyles: ɵStyleData = {}): ɵStyleData[] {\n  const errors: string[] = [];\n  const normalizedKeyframes: ɵStyleData[] = [];\n  let previousOffset = -1;\n  let previousKeyframe: ɵStyleData|null = null;\n  keyframes.forEach(kf => {\n    const offset = kf['offset'] as number;\n    const isSameOffset = offset == previousOffset;\n    const normalizedKeyframe: ɵStyleData = (isSameOffset && previousKeyframe) || {};\n    Object.keys(kf).forEach(prop => {\n      let normalizedProp = prop;\n      let normalizedValue = kf[prop];\n      if (prop !== 'offset') {\n        normalizedProp = normalizer.normalizePropertyName(normalizedProp, errors);\n        switch (normalizedValue) {\n          case PRE_STYLE:\n            normalizedValue = preStyles[prop];\n            break;\n\n          case AUTO_STYLE:\n            normalizedValue = postStyles[prop];\n            break;\n\n          default:\n            normalizedValue =\n                normalizer.normalizeStyleValue(prop, normalizedProp, normalizedValue, errors);\n            break;\n        }\n      }\n      normalizedKeyframe[normalizedProp] = normalizedValue;\n    });\n    if (!isSameOffset) {\n      normalizedKeyframes.push(normalizedKeyframe);\n    }\n    previousKeyframe = normalizedKeyframe;\n    previousOffset = offset;\n  });\n  if (errors.length) {\n    const LINE_START = '\\n - ';\n    throw new Error(\n        `Unable to animate due to the following errors:${LINE_START}${errors.join(LINE_START)}`);\n  }\n\n  return normalizedKeyframes;\n}\n\nexport function listenOnPlayer(\n    player: AnimationPlayer, eventName: string, event: AnimationEvent|undefined,\n    callback: (event: any) => any) {\n  switch (eventName) {\n    case 'start':\n      player.onStart(() => callback(event && copyAnimationEvent(event, 'start', player)));\n      break;\n    case 'done':\n      player.onDone(() => callback(event && copyAnimationEvent(event, 'done', player)));\n      break;\n    case 'destroy':\n      player.onDestroy(() => callback(event && copyAnimationEvent(event, 'destroy', player)));\n      break;\n  }\n}\n\nexport function copyAnimationEvent(\n    e: AnimationEvent, phaseName: string, player: AnimationPlayer): AnimationEvent {\n  const totalTime = player.totalTime;\n  const disabled = (player as any).disabled ? true : false;\n  const event = makeAnimationEvent(\n      e.element, e.triggerName, e.fromState, e.toState, phaseName || e.phaseName,\n      totalTime == undefined ? e.totalTime : totalTime, disabled);\n  const data = (e as any)['_data'];\n  if (data != null) {\n    (event as any)['_data'] = data;\n  }\n  return event;\n}\n\nexport function makeAnimationEvent(\n    element: any, triggerName: string, fromState: string, toState: string, phaseName: string = '',\n    totalTime: number = 0, disabled?: boolean): AnimationEvent {\n  return {element, triggerName, fromState, toState, phaseName, totalTime, disabled: !!disabled};\n}\n\nexport function getOrSetAsInMap(\n    map: Map<any, any>|{[key: string]: any}, key: any, defaultValue: any) {\n  let value: any;\n  if (map instanceof Map) {\n    value = map.get(key);\n    if (!value) {\n      map.set(key, value = defaultValue);\n    }\n  } else {\n    value = map[key];\n    if (!value) {\n      value = map[key] = defaultValue;\n    }\n  }\n  return value;\n}\n\nexport function parseTimelineCommand(command: string): [string, string] {\n  const separatorPos = command.indexOf(':');\n  const id = command.substring(1, separatorPos);\n  const action = command.substr(separatorPos + 1);\n  return [id, action];\n}\n\nlet _contains: (elm1: any, elm2: any) => boolean = (elm1: any, elm2: any) => false;\nlet _matches: (element: any, selector: string) => boolean = (element: any, selector: string) =>\n    false;\nlet _query: (element: any, selector: string, multi: boolean) => any[] =\n    (element: any, selector: string, multi: boolean) => {\n      return [];\n    };\n\n// Define utility methods for browsers and platform-server(domino) where Element\n// and utility methods exist.\nconst _isNode = isNode();\nif (_isNode || typeof Element !== 'undefined') {\n  // this is well supported in all browsers\n  _contains = (elm1: any, elm2: any) => {\n    return elm1.contains(elm2) as boolean;\n  };\n\n  _matches = (() => {\n    if (_isNode || Element.prototype.matches) {\n      return (element: any, selector: string) => element.matches(selector);\n    } else {\n      const proto = Element.prototype as any;\n      const fn = proto.matchesSelector || proto.mozMatchesSelector || proto.msMatchesSelector ||\n          proto.oMatchesSelector || proto.webkitMatchesSelector;\n      if (fn) {\n        return (element: any, selector: string) => fn.apply(element, [selector]);\n      } else {\n        return _matches;\n      }\n    }\n  })();\n\n  _query = (element: any, selector: string, multi: boolean): any[] => {\n    let results: any[] = [];\n    if (multi) {\n      results.push(...element.querySelectorAll(selector));\n    } else {\n      const elm = element.querySelector(selector);\n      if (elm) {\n        results.push(elm);\n      }\n    }\n    return results;\n  };\n}\n\nfunction containsVendorPrefix(prop: string): boolean {\n  // Webkit is the only real popular vendor prefix nowadays\n  // cc: http://shouldiprefix.com/\n  return prop.substring(1, 6) == 'ebkit';  // webkit or Webkit\n}\n\nlet _CACHED_BODY: {style: any}|null = null;\nlet _IS_WEBKIT = false;\nexport function validateStyleProperty(prop: string): boolean {\n  if (!_CACHED_BODY) {\n    _CACHED_BODY = getBodyNode() || {};\n    _IS_WEBKIT = _CACHED_BODY!.style ? ('WebkitAppearance' in _CACHED_BODY!.style) : false;\n  }\n\n  let result = true;\n  if (_CACHED_BODY!.style && !containsVendorPrefix(prop)) {\n    result = prop in _CACHED_BODY!.style;\n    if (!result && _IS_WEBKIT) {\n      const camelProp = 'Webkit' + prop.charAt(0).toUpperCase() + prop.substr(1);\n      result = camelProp in _CACHED_BODY!.style;\n    }\n  }\n\n  return result;\n}\n\nexport function getBodyNode(): any|null {\n  if (typeof document != 'undefined') {\n    return document.body;\n  }\n  return null;\n}\n\nexport const matchesElement = _matches;\nexport const containsElement = _contains;\nexport const invokeQuery = _query;\n\nexport function hypenatePropsObject(object: {[key: string]: any}): {[key: string]: any} {\n  const newObj: {[key: string]: any} = {};\n  Object.keys(object).forEach(prop => {\n    const newProp = prop.replace(/([a-z])([A-Z])/g, '$1-$2');\n    newObj[newProp] = object[prop];\n  });\n  return newObj;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {AnimationPlayer, NoopAnimationPlayer} from '@angular/animations';\nimport {Injectable} from '@angular/core';\n\nimport {containsElement, invokeQuery, matchesElement, validateStyleProperty} from './shared';\n\n/**\n * @publicApi\n */\n@Injectable()\nexport class NoopAnimationDriver implements AnimationDriver {\n  validateStyleProperty(prop: string): boolean {\n    return validateStyleProperty(prop);\n  }\n\n  matchesElement(element: any, selector: string): boolean {\n    return matchesElement(element, selector);\n  }\n\n  containsElement(elm1: any, elm2: any): boolean {\n    return containsElement(elm1, elm2);\n  }\n\n  query(element: any, selector: string, multi: boolean): any[] {\n    return invokeQuery(element, selector, multi);\n  }\n\n  computeStyle(element: any, prop: string, defaultValue?: string): string {\n    return defaultValue || '';\n  }\n\n  animate(\n      element: any, keyframes: {[key: string]: string|number}[], duration: number, delay: number,\n      easing: string, previousPlayers: any[] = [],\n      scrubberAccessRequested?: boolean): AnimationPlayer {\n    return new NoopAnimationPlayer(duration, delay);\n  }\n}\n\n/**\n * @publicApi\n */\nexport abstract class AnimationDriver {\n  static NOOP: AnimationDriver = new NoopAnimationDriver();\n\n  abstract validateStyleProperty(prop: string): boolean;\n\n  abstract matchesElement(element: any, selector: string): boolean;\n\n  abstract containsElement(elm1: any, elm2: any): boolean;\n\n  abstract query(element: any, selector: string, multi: boolean): any[];\n\n  abstract computeStyle(element: any, prop: string, defaultValue?: string): string;\n\n  abstract animate(\n      element: any, keyframes: {[key: string]: string|number}[], duration: number, delay: number,\n      easing?: string|null, previousPlayers?: any[], scrubberAccessRequested?: boolean): any;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {AnimateTimings, AnimationMetadata, AnimationMetadataType, AnimationOptions, sequence, ɵStyleData} from '@angular/animations';\nimport {Ast as AnimationAst, AstVisitor as AnimationAstVisitor} from './dsl/animation_ast';\nimport {AnimationDslVisitor} from './dsl/animation_dsl_visitor';\nimport {isNode} from './render/shared';\n\nexport const ONE_SECOND = 1000;\n\nexport const SUBSTITUTION_EXPR_START = '{{';\nexport const SUBSTITUTION_EXPR_END = '}}';\nexport const ENTER_CLASSNAME = 'ng-enter';\nexport const LEAVE_CLASSNAME = 'ng-leave';\nexport const ENTER_SELECTOR = '.ng-enter';\nexport const LEAVE_SELECTOR = '.ng-leave';\nexport const NG_TRIGGER_CLASSNAME = 'ng-trigger';\nexport const NG_TRIGGER_SELECTOR = '.ng-trigger';\nexport const NG_ANIMATING_CLASSNAME = 'ng-animating';\nexport const NG_ANIMATING_SELECTOR = '.ng-animating';\n\nexport function resolveTimingValue(value: string|number) {\n  if (typeof value == 'number') return value;\n\n  const matches = value.match(/^(-?[\\.\\d]+)(m?s)/);\n  if (!matches || matches.length < 2) return 0;\n\n  return _convertTimeValueToMS(parseFloat(matches[1]), matches[2]);\n}\n\nfunction _convertTimeValueToMS(value: number, unit: string): number {\n  switch (unit) {\n    case 's':\n      return value * ONE_SECOND;\n    default:  // ms or something else\n      return value;\n  }\n}\n\nexport function resolveTiming(\n    timings: string|number|AnimateTimings, errors: any[], allowNegativeValues?: boolean) {\n  return timings.hasOwnProperty('duration') ?\n      <AnimateTimings>timings :\n      parseTimeExpression(<string|number>timings, errors, allowNegativeValues);\n}\n\nfunction parseTimeExpression(\n    exp: string|number, errors: string[], allowNegativeValues?: boolean): AnimateTimings {\n  const regex = /^(-?[\\.\\d]+)(m?s)(?:\\s+(-?[\\.\\d]+)(m?s))?(?:\\s+([-a-z]+(?:\\(.+?\\))?))?$/i;\n  let duration: number;\n  let delay: number = 0;\n  let easing: string = '';\n  if (typeof exp === 'string') {\n    const matches = exp.match(regex);\n    if (matches === null) {\n      errors.push(`The provided timing value \"${exp}\" is invalid.`);\n      return {duration: 0, delay: 0, easing: ''};\n    }\n\n    duration = _convertTimeValueToMS(parseFloat(matches[1]), matches[2]);\n\n    const delayMatch = matches[3];\n    if (delayMatch != null) {\n      delay = _convertTimeValueToMS(parseFloat(delayMatch), matches[4]);\n    }\n\n    const easingVal = matches[5];\n    if (easingVal) {\n      easing = easingVal;\n    }\n  } else {\n    duration = exp;\n  }\n\n  if (!allowNegativeValues) {\n    let containsErrors = false;\n    let startIndex = errors.length;\n    if (duration < 0) {\n      errors.push(`Duration values below 0 are not allowed for this animation step.`);\n      containsErrors = true;\n    }\n    if (delay < 0) {\n      errors.push(`Delay values below 0 are not allowed for this animation step.`);\n      containsErrors = true;\n    }\n    if (containsErrors) {\n      errors.splice(startIndex, 0, `The provided timing value \"${exp}\" is invalid.`);\n    }\n  }\n\n  return {duration, delay, easing};\n}\n\nexport function copyObj(\n    obj: {[key: string]: any}, destination: {[key: string]: any} = {}): {[key: string]: any} {\n  Object.keys(obj).forEach(prop => {\n    destination[prop] = obj[prop];\n  });\n  return destination;\n}\n\nexport function normalizeStyles(styles: ɵStyleData|ɵStyleData[]): ɵStyleData {\n  const normalizedStyles: ɵStyleData = {};\n  if (Array.isArray(styles)) {\n    styles.forEach(data => copyStyles(data, false, normalizedStyles));\n  } else {\n    copyStyles(styles, false, normalizedStyles);\n  }\n  return normalizedStyles;\n}\n\nexport function copyStyles(\n    styles: ɵStyleData, readPrototype: boolean, destination: ɵStyleData = {}): ɵStyleData {\n  if (readPrototype) {\n    // we make use of a for-in loop so that the\n    // prototypically inherited properties are\n    // revealed from the backFill map\n    for (let prop in styles) {\n      destination[prop] = styles[prop];\n    }\n  } else {\n    copyObj(styles, destination);\n  }\n  return destination;\n}\n\nfunction getStyleAttributeString(element: any, key: string, value: string) {\n  // Return the key-value pair string to be added to the style attribute for the\n  // given CSS style key.\n  if (value) {\n    return key + ':' + value + ';';\n  } else {\n    return '';\n  }\n}\n\nfunction writeStyleAttribute(element: any) {\n  // Read the style property of the element and manually reflect it to the\n  // style attribute. This is needed because Domino on platform-server doesn't\n  // understand the full set of allowed CSS properties and doesn't reflect some\n  // of them automatically.\n  let styleAttrValue = '';\n  for (let i = 0; i < element.style.length; i++) {\n    const key = element.style.item(i);\n    styleAttrValue += getStyleAttributeString(element, key, element.style.getPropertyValue(key));\n  }\n  for (const key in element.style) {\n    // Skip internal Domino properties that don't need to be reflected.\n    if (!element.style.hasOwnProperty(key) || key.startsWith('_')) {\n      continue;\n    }\n    const dashKey = camelCaseToDashCase(key);\n    styleAttrValue += getStyleAttributeString(element, dashKey, element.style[key]);\n  }\n  element.setAttribute('style', styleAttrValue);\n}\n\nexport function setStyles(element: any, styles: ɵStyleData, formerStyles?: {[key: string]: any}) {\n  if (element['style']) {\n    Object.keys(styles).forEach(prop => {\n      const camelProp = dashCaseToCamelCase(prop);\n      if (formerStyles && !formerStyles.hasOwnProperty(prop)) {\n        formerStyles[prop] = element.style[camelProp];\n      }\n      element.style[camelProp] = styles[prop];\n    });\n    // On the server set the 'style' attribute since it's not automatically reflected.\n    if (isNode()) {\n      writeStyleAttribute(element);\n    }\n  }\n}\n\nexport function eraseStyles(element: any, styles: ɵStyleData) {\n  if (element['style']) {\n    Object.keys(styles).forEach(prop => {\n      const camelProp = dashCaseToCamelCase(prop);\n      element.style[camelProp] = '';\n    });\n    // On the server set the 'style' attribute since it's not automatically reflected.\n    if (isNode()) {\n      writeStyleAttribute(element);\n    }\n  }\n}\n\nexport function normalizeAnimationEntry(steps: AnimationMetadata|\n                                        AnimationMetadata[]): AnimationMetadata {\n  if (Array.isArray(steps)) {\n    if (steps.length == 1) return steps[0];\n    return sequence(steps);\n  }\n  return steps as AnimationMetadata;\n}\n\nexport function validateStyleParams(\n    value: string|number, options: AnimationOptions, errors: any[]) {\n  const params = options.params || {};\n  const matches = extractStyleParams(value);\n  if (matches.length) {\n    matches.forEach(varName => {\n      if (!params.hasOwnProperty(varName)) {\n        errors.push(\n            `Unable to resolve the local animation param ${varName} in the given list of values`);\n      }\n    });\n  }\n}\n\nconst PARAM_REGEX =\n    new RegExp(`${SUBSTITUTION_EXPR_START}\\\\s*(.+?)\\\\s*${SUBSTITUTION_EXPR_END}`, 'g');\nexport function extractStyleParams(value: string|number): string[] {\n  let params: string[] = [];\n  if (typeof value === 'string') {\n    let match: any;\n    while (match = PARAM_REGEX.exec(value)) {\n      params.push(match[1] as string);\n    }\n    PARAM_REGEX.lastIndex = 0;\n  }\n  return params;\n}\n\nexport function interpolateParams(\n    value: string|number, params: {[name: string]: any}, errors: any[]): string|number {\n  const original = value.toString();\n  const str = original.replace(PARAM_REGEX, (_, varName) => {\n    let localVal = params[varName];\n    // this means that the value was never overridden by the data passed in by the user\n    if (!params.hasOwnProperty(varName)) {\n      errors.push(`Please provide a value for the animation param ${varName}`);\n      localVal = '';\n    }\n    return localVal.toString();\n  });\n\n  // we do this to assert that numeric values stay as they are\n  return str == original ? value : str;\n}\n\nexport function iteratorToArray(iterator: any): any[] {\n  const arr: any[] = [];\n  let item = iterator.next();\n  while (!item.done) {\n    arr.push(item.value);\n    item = iterator.next();\n  }\n  return arr;\n}\n\nexport function mergeAnimationOptions(\n    source: AnimationOptions, destination: AnimationOptions): AnimationOptions {\n  if (source.params) {\n    const p0 = source.params;\n    if (!destination.params) {\n      destination.params = {};\n    }\n    const p1 = destination.params;\n    Object.keys(p0).forEach(param => {\n      if (!p1.hasOwnProperty(param)) {\n        p1[param] = p0[param];\n      }\n    });\n  }\n  return destination;\n}\n\nconst DASH_CASE_REGEXP = /-+([a-z0-9])/g;\nexport function dashCaseToCamelCase(input: string): string {\n  return input.replace(DASH_CASE_REGEXP, (...m: any[]) => m[1].toUpperCase());\n}\n\nfunction camelCaseToDashCase(input: string): string {\n  return input.replace(/([a-z])([A-Z])/g, '$1-$2').toLowerCase();\n}\n\nexport function allowPreviousPlayerStylesMerge(duration: number, delay: number) {\n  return duration === 0 || delay === 0;\n}\n\nexport function balancePreviousStylesIntoKeyframes(\n    element: any, keyframes: {[key: string]: any}[], previousStyles: {[key: string]: any}) {\n  const previousStyleProps = Object.keys(previousStyles);\n  if (previousStyleProps.length && keyframes.length) {\n    let startingKeyframe = keyframes[0];\n    let missingStyleProps: string[] = [];\n    previousStyleProps.forEach(prop => {\n      if (!startingKeyframe.hasOwnProperty(prop)) {\n        missingStyleProps.push(prop);\n      }\n      startingKeyframe[prop] = previousStyles[prop];\n    });\n\n    if (missingStyleProps.length) {\n      // tslint:disable-next-line\n      for (var i = 1; i < keyframes.length; i++) {\n        let kf = keyframes[i];\n        missingStyleProps.forEach(function(prop) {\n          kf[prop] = computeStyle(element, prop);\n        });\n      }\n    }\n  }\n  return keyframes;\n}\n\nexport function visitDslNode(\n    visitor: AnimationDslVisitor, node: AnimationMetadata, context: any): any;\nexport function visitDslNode(\n    visitor: AnimationAstVisitor, node: AnimationAst<AnimationMetadataType>, context: any): any;\nexport function visitDslNode(visitor: any, node: any, context: any): any {\n  switch (node.type) {\n    case AnimationMetadataType.Trigger:\n      return visitor.visitTrigger(node, context);\n    case AnimationMetadataType.State:\n      return visitor.visitState(node, context);\n    case AnimationMetadataType.Transition:\n      return visitor.visitTransition(node, context);\n    case AnimationMetadataType.Sequence:\n      return visitor.visitSequence(node, context);\n    case AnimationMetadataType.Group:\n      return visitor.visitGroup(node, context);\n    case AnimationMetadataType.Animate:\n      return visitor.visitAnimate(node, context);\n    case AnimationMetadataType.Keyframes:\n      return visitor.visitKeyframes(node, context);\n    case AnimationMetadataType.Style:\n      return visitor.visitStyle(node, context);\n    case AnimationMetadataType.Reference:\n      return visitor.visitReference(node, context);\n    case AnimationMetadataType.AnimateChild:\n      return visitor.visitAnimateChild(node, context);\n    case AnimationMetadataType.AnimateRef:\n      return visitor.visitAnimateRef(node, context);\n    case AnimationMetadataType.Query:\n      return visitor.visitQuery(node, context);\n    case AnimationMetadataType.Stagger:\n      return visitor.visitStagger(node, context);\n    default:\n      throw new Error(`Unable to resolve animation metadata node #${node.type}`);\n  }\n}\n\nexport function computeStyle(element: any, prop: string): string {\n  return (<any>window.getComputedStyle(element))[prop];\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nexport const ANY_STATE = '*';\nexport declare type TransitionMatcherFn =\n    (fromState: any, toState: any, element: any, params: {[key: string]: any}) => boolean;\n\nexport function parseTransitionExpr(\n    transitionValue: string|TransitionMatcherFn, errors: string[]): TransitionMatcherFn[] {\n  const expressions: TransitionMatcherFn[] = [];\n  if (typeof transitionValue == 'string') {\n    transitionValue.split(/\\s*,\\s*/).forEach(\n        str => parseInnerTransitionStr(str, expressions, errors));\n  } else {\n    expressions.push(<TransitionMatcherFn>transitionValue);\n  }\n  return expressions;\n}\n\nfunction parseInnerTransitionStr(\n    eventStr: string, expressions: TransitionMatcherFn[], errors: string[]) {\n  if (eventStr[0] == ':') {\n    const result = parseAnimationAlias(eventStr, errors);\n    if (typeof result == 'function') {\n      expressions.push(result);\n      return;\n    }\n    eventStr = result;\n  }\n\n  const match = eventStr.match(/^(\\*|[-\\w]+)\\s*(<?[=-]>)\\s*(\\*|[-\\w]+)$/);\n  if (match == null || match.length < 4) {\n    errors.push(`The provided transition expression \"${eventStr}\" is not supported`);\n    return expressions;\n  }\n\n  const fromState = match[1];\n  const separator = match[2];\n  const toState = match[3];\n  expressions.push(makeLambdaFromStates(fromState, toState));\n\n  const isFullAnyStateExpr = fromState == ANY_STATE && toState == ANY_STATE;\n  if (separator[0] == '<' && !isFullAnyStateExpr) {\n    expressions.push(makeLambdaFromStates(toState, fromState));\n  }\n}\n\nfunction parseAnimationAlias(alias: string, errors: string[]): string|TransitionMatcherFn {\n  switch (alias) {\n    case ':enter':\n      return 'void => *';\n    case ':leave':\n      return '* => void';\n    case ':increment':\n      return (fromState: any, toState: any): boolean => parseFloat(toState) > parseFloat(fromState);\n    case ':decrement':\n      return (fromState: any, toState: any): boolean => parseFloat(toState) < parseFloat(fromState);\n    default:\n      errors.push(`The transition alias value \"${alias}\" is not supported`);\n      return '* => *';\n  }\n}\n\n// DO NOT REFACTOR ... keep the follow set instantiations\n// with the values intact (closure compiler for some reason\n// removes follow-up lines that add the values outside of\n// the constructor...\nconst TRUE_BOOLEAN_VALUES = new Set<string>(['true', '1']);\nconst FALSE_BOOLEAN_VALUES = new Set<string>(['false', '0']);\n\nfunction makeLambdaFromStates(lhs: string, rhs: string): TransitionMatcherFn {\n  const LHS_MATCH_BOOLEAN = TRUE_BOOLEAN_VALUES.has(lhs) || FALSE_BOOLEAN_VALUES.has(lhs);\n  const RHS_MATCH_BOOLEAN = TRUE_BOOLEAN_VALUES.has(rhs) || FALSE_BOOLEAN_VALUES.has(rhs);\n\n  return (fromState: any, toState: any): boolean => {\n    let lhsMatch = lhs == ANY_STATE || lhs == fromState;\n    let rhsMatch = rhs == ANY_STATE || rhs == toState;\n\n    if (!lhsMatch && LHS_MATCH_BOOLEAN && typeof fromState === 'boolean') {\n      lhsMatch = fromState ? TRUE_BOOLEAN_VALUES.has(lhs) : FALSE_BOOLEAN_VALUES.has(lhs);\n    }\n    if (!rhsMatch && RHS_MATCH_BOOLEAN && typeof toState === 'boolean') {\n      rhsMatch = toState ? TRUE_BOOLEAN_VALUES.has(rhs) : FALSE_BOOLEAN_VALUES.has(rhs);\n    }\n\n    return lhsMatch && rhsMatch;\n  };\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {AnimateTimings, AnimationAnimateChildMetadata, AnimationAnimateMetadata, AnimationAnimateRefMetadata, AnimationGroupMetadata, AnimationKeyframesSequenceMetadata, AnimationMetadata, AnimationMetadataType, AnimationOptions, AnimationQueryMetadata, AnimationQueryOptions, AnimationReferenceMetadata, AnimationSequenceMetadata, AnimationStaggerMetadata, AnimationStateMetadata, AnimationStyleMetadata, AnimationTransitionMetadata, AnimationTriggerMetadata, AUTO_STYLE, style, ɵStyleData} from '@angular/animations';\n\nimport {AnimationDriver} from '../render/animation_driver';\nimport {getOrSetAsInMap} from '../render/shared';\nimport {copyObj, ENTER_SELECTOR, extractStyleParams, iteratorToArray, LEAVE_SELECTOR, NG_ANIMATING_SELECTOR, NG_TRIGGER_SELECTOR, normalizeAnimationEntry, resolveTiming, SUBSTITUTION_EXPR_START, validateStyleParams, visitDslNode} from '../util';\n\nimport {AnimateAst, AnimateChildAst, AnimateRefAst, Ast, DynamicTimingAst, GroupAst, KeyframesAst, QueryAst, ReferenceAst, SequenceAst, StaggerAst, StateAst, StyleAst, TimingAst, TransitionAst, TriggerAst} from './animation_ast';\nimport {AnimationDslVisitor} from './animation_dsl_visitor';\nimport {parseTransitionExpr} from './animation_transition_expr';\n\nconst SELF_TOKEN = ':self';\nconst SELF_TOKEN_REGEX = new RegExp(`\\s*${SELF_TOKEN}\\s*,?`, 'g');\n\n/*\n * [Validation]\n * The visitor code below will traverse the animation AST generated by the animation verb functions\n * (the output is a tree of objects) and attempt to perform a series of validations on the data. The\n * following corner-cases will be validated:\n *\n * 1. Overlap of animations\n * Given that a CSS property cannot be animated in more than one place at the same time, it's\n * important that this behavior is detected and validated. The way in which this occurs is that\n * each time a style property is examined, a string-map containing the property will be updated with\n * the start and end times for when the property is used within an animation step.\n *\n * If there are two or more parallel animations that are currently running (these are invoked by the\n * group()) on the same element then the validator will throw an error. Since the start/end timing\n * values are collected for each property then if the current animation step is animating the same\n * property and its timing values fall anywhere into the window of time that the property is\n * currently being animated within then this is what causes an error.\n *\n * 2. Timing values\n * The validator will validate to see if a timing value of `duration delay easing` or\n * `durationNumber` is valid or not.\n *\n * (note that upon validation the code below will replace the timing data with an object containing\n * {duration,delay,easing}.\n *\n * 3. Offset Validation\n * Each of the style() calls are allowed to have an offset value when placed inside of keyframes().\n * Offsets within keyframes() are considered valid when:\n *\n *   - No offsets are used at all\n *   - Each style() entry contains an offset value\n *   - Each offset is between 0 and 1\n *   - Each offset is greater to or equal than the previous one\n *\n * Otherwise an error will be thrown.\n */\nexport function buildAnimationAst(\n    driver: AnimationDriver, metadata: AnimationMetadata|AnimationMetadata[],\n    errors: any[]): Ast<AnimationMetadataType> {\n  return new AnimationAstBuilderVisitor(driver).build(metadata, errors);\n}\n\nconst ROOT_SELECTOR = '';\n\nexport class AnimationAstBuilderVisitor implements AnimationDslVisitor {\n  constructor(private _driver: AnimationDriver) {}\n\n  build(metadata: AnimationMetadata|AnimationMetadata[], errors: any[]):\n      Ast<AnimationMetadataType> {\n    const context = new AnimationAstBuilderContext(errors);\n    this._resetContextStyleTimingState(context);\n    return <Ast<AnimationMetadataType>>visitDslNode(\n        this, normalizeAnimationEntry(metadata), context);\n  }\n\n  private _resetContextStyleTimingState(context: AnimationAstBuilderContext) {\n    context.currentQuerySelector = ROOT_SELECTOR;\n    context.collectedStyles = {};\n    context.collectedStyles[ROOT_SELECTOR] = {};\n    context.currentTime = 0;\n  }\n\n  visitTrigger(metadata: AnimationTriggerMetadata, context: AnimationAstBuilderContext):\n      TriggerAst {\n    let queryCount = context.queryCount = 0;\n    let depCount = context.depCount = 0;\n    const states: StateAst[] = [];\n    const transitions: TransitionAst[] = [];\n    if (metadata.name.charAt(0) == '@') {\n      context.errors.push(\n          'animation triggers cannot be prefixed with an `@` sign (e.g. trigger(\\'@foo\\', [...]))');\n    }\n\n    metadata.definitions.forEach(def => {\n      this._resetContextStyleTimingState(context);\n      if (def.type == AnimationMetadataType.State) {\n        const stateDef = def as AnimationStateMetadata;\n        const name = stateDef.name;\n        name.toString().split(/\\s*,\\s*/).forEach(n => {\n          stateDef.name = n;\n          states.push(this.visitState(stateDef, context));\n        });\n        stateDef.name = name;\n      } else if (def.type == AnimationMetadataType.Transition) {\n        const transition = this.visitTransition(def as AnimationTransitionMetadata, context);\n        queryCount += transition.queryCount;\n        depCount += transition.depCount;\n        transitions.push(transition);\n      } else {\n        context.errors.push(\n            'only state() and transition() definitions can sit inside of a trigger()');\n      }\n    });\n\n    return {\n      type: AnimationMetadataType.Trigger,\n      name: metadata.name,\n      states,\n      transitions,\n      queryCount,\n      depCount,\n      options: null\n    };\n  }\n\n  visitState(metadata: AnimationStateMetadata, context: AnimationAstBuilderContext): StateAst {\n    const styleAst = this.visitStyle(metadata.styles, context);\n    const astParams = (metadata.options && metadata.options.params) || null;\n    if (styleAst.containsDynamicStyles) {\n      const missingSubs = new Set<string>();\n      const params = astParams || {};\n      styleAst.styles.forEach(value => {\n        if (isObject(value)) {\n          const stylesObj = value as any;\n          Object.keys(stylesObj).forEach(prop => {\n            extractStyleParams(stylesObj[prop]).forEach(sub => {\n              if (!params.hasOwnProperty(sub)) {\n                missingSubs.add(sub);\n              }\n            });\n          });\n        }\n      });\n      if (missingSubs.size) {\n        const missingSubsArr = iteratorToArray(missingSubs.values());\n        context.errors.push(`state(\"${\n            metadata\n                .name}\", ...) must define default values for all the following style substitutions: ${\n            missingSubsArr.join(', ')}`);\n      }\n    }\n\n    return {\n      type: AnimationMetadataType.State,\n      name: metadata.name,\n      style: styleAst,\n      options: astParams ? {params: astParams} : null\n    };\n  }\n\n  visitTransition(metadata: AnimationTransitionMetadata, context: AnimationAstBuilderContext):\n      TransitionAst {\n    context.queryCount = 0;\n    context.depCount = 0;\n    const animation = visitDslNode(this, normalizeAnimationEntry(metadata.animation), context);\n    const matchers = parseTransitionExpr(metadata.expr, context.errors);\n\n    return {\n      type: AnimationMetadataType.Transition,\n      matchers,\n      animation,\n      queryCount: context.queryCount,\n      depCount: context.depCount,\n      options: normalizeAnimationOptions(metadata.options)\n    };\n  }\n\n  visitSequence(metadata: AnimationSequenceMetadata, context: AnimationAstBuilderContext):\n      SequenceAst {\n    return {\n      type: AnimationMetadataType.Sequence,\n      steps: metadata.steps.map(s => visitDslNode(this, s, context)),\n      options: normalizeAnimationOptions(metadata.options)\n    };\n  }\n\n  visitGroup(metadata: AnimationGroupMetadata, context: AnimationAstBuilderContext): GroupAst {\n    const currentTime = context.currentTime;\n    let furthestTime = 0;\n    const steps = metadata.steps.map(step => {\n      context.currentTime = currentTime;\n      const innerAst = visitDslNode(this, step, context);\n      furthestTime = Math.max(furthestTime, context.currentTime);\n      return innerAst;\n    });\n\n    context.currentTime = furthestTime;\n    return {\n      type: AnimationMetadataType.Group,\n      steps,\n      options: normalizeAnimationOptions(metadata.options)\n    };\n  }\n\n  visitAnimate(metadata: AnimationAnimateMetadata, context: AnimationAstBuilderContext):\n      AnimateAst {\n    const timingAst = constructTimingAst(metadata.timings, context.errors);\n    context.currentAnimateTimings = timingAst;\n\n    let styleAst: StyleAst|KeyframesAst;\n    let styleMetadata: AnimationMetadata = metadata.styles ? metadata.styles : style({});\n    if (styleMetadata.type == AnimationMetadataType.Keyframes) {\n      styleAst = this.visitKeyframes(styleMetadata as AnimationKeyframesSequenceMetadata, context);\n    } else {\n      let styleMetadata = metadata.styles as AnimationStyleMetadata;\n      let isEmpty = false;\n      if (!styleMetadata) {\n        isEmpty = true;\n        const newStyleData: {[prop: string]: string|number} = {};\n        if (timingAst.easing) {\n          newStyleData['easing'] = timingAst.easing;\n        }\n        styleMetadata = style(newStyleData);\n      }\n      context.currentTime += timingAst.duration + timingAst.delay;\n      const _styleAst = this.visitStyle(styleMetadata, context);\n      _styleAst.isEmptyStep = isEmpty;\n      styleAst = _styleAst;\n    }\n\n    context.currentAnimateTimings = null;\n    return {\n      type: AnimationMetadataType.Animate,\n      timings: timingAst,\n      style: styleAst,\n      options: null\n    };\n  }\n\n  visitStyle(metadata: AnimationStyleMetadata, context: AnimationAstBuilderContext): StyleAst {\n    const ast = this._makeStyleAst(metadata, context);\n    this._validateStyleAst(ast, context);\n    return ast;\n  }\n\n  private _makeStyleAst(metadata: AnimationStyleMetadata, context: AnimationAstBuilderContext):\n      StyleAst {\n    const styles: (ɵStyleData|string)[] = [];\n    if (Array.isArray(metadata.styles)) {\n      (metadata.styles as (ɵStyleData | string)[]).forEach(styleTuple => {\n        if (typeof styleTuple == 'string') {\n          if (styleTuple == AUTO_STYLE) {\n            styles.push(styleTuple);\n          } else {\n            context.errors.push(`The provided style string value ${styleTuple} is not allowed.`);\n          }\n        } else {\n          styles.push(styleTuple);\n        }\n      });\n    } else {\n      styles.push(metadata.styles);\n    }\n\n    let containsDynamicStyles = false;\n    let collectedEasing: string|null = null;\n    styles.forEach(styleData => {\n      if (isObject(styleData)) {\n        const styleMap = styleData as ɵStyleData;\n        const easing = styleMap['easing'];\n        if (easing) {\n          collectedEasing = easing as string;\n          delete styleMap['easing'];\n        }\n        if (!containsDynamicStyles) {\n          for (let prop in styleMap) {\n            const value = styleMap[prop];\n            if (value.toString().indexOf(SUBSTITUTION_EXPR_START) >= 0) {\n              containsDynamicStyles = true;\n              break;\n            }\n          }\n        }\n      }\n    });\n\n    return {\n      type: AnimationMetadataType.Style,\n      styles,\n      easing: collectedEasing,\n      offset: metadata.offset,\n      containsDynamicStyles,\n      options: null\n    };\n  }\n\n  private _validateStyleAst(ast: StyleAst, context: AnimationAstBuilderContext): void {\n    const timings = context.currentAnimateTimings;\n    let endTime = context.currentTime;\n    let startTime = context.currentTime;\n    if (timings && startTime > 0) {\n      startTime -= timings.duration + timings.delay;\n    }\n\n    ast.styles.forEach(tuple => {\n      if (typeof tuple == 'string') return;\n\n      Object.keys(tuple).forEach(prop => {\n        if (!this._driver.validateStyleProperty(prop)) {\n          context.errors.push(`The provided animation property \"${\n              prop}\" is not a supported CSS property for animations`);\n          return;\n        }\n\n        const collectedStyles = context.collectedStyles[context.currentQuerySelector!];\n        const collectedEntry = collectedStyles[prop];\n        let updateCollectedStyle = true;\n        if (collectedEntry) {\n          if (startTime != endTime && startTime >= collectedEntry.startTime &&\n              endTime <= collectedEntry.endTime) {\n            context.errors.push(`The CSS property \"${prop}\" that exists between the times of \"${\n                collectedEntry.startTime}ms\" and \"${\n                collectedEntry\n                    .endTime}ms\" is also being animated in a parallel animation between the times of \"${\n                startTime}ms\" and \"${endTime}ms\"`);\n            updateCollectedStyle = false;\n          }\n\n          // we always choose the smaller start time value since we\n          // want to have a record of the entire animation window where\n          // the style property is being animated in between\n          startTime = collectedEntry.startTime;\n        }\n\n        if (updateCollectedStyle) {\n          collectedStyles[prop] = {startTime, endTime};\n        }\n\n        if (context.options) {\n          validateStyleParams(tuple[prop], context.options, context.errors);\n        }\n      });\n    });\n  }\n\n  visitKeyframes(metadata: AnimationKeyframesSequenceMetadata, context: AnimationAstBuilderContext):\n      KeyframesAst {\n    const ast: KeyframesAst = {type: AnimationMetadataType.Keyframes, styles: [], options: null};\n    if (!context.currentAnimateTimings) {\n      context.errors.push(`keyframes() must be placed inside of a call to animate()`);\n      return ast;\n    }\n\n    const MAX_KEYFRAME_OFFSET = 1;\n\n    let totalKeyframesWithOffsets = 0;\n    const offsets: number[] = [];\n    let offsetsOutOfOrder = false;\n    let keyframesOutOfRange = false;\n    let previousOffset: number = 0;\n\n    const keyframes: StyleAst[] = metadata.steps.map(styles => {\n      const style = this._makeStyleAst(styles, context);\n      let offsetVal: number|null =\n          style.offset != null ? style.offset : consumeOffset(style.styles);\n      let offset: number = 0;\n      if (offsetVal != null) {\n        totalKeyframesWithOffsets++;\n        offset = style.offset = offsetVal;\n      }\n      keyframesOutOfRange = keyframesOutOfRange || offset < 0 || offset > 1;\n      offsetsOutOfOrder = offsetsOutOfOrder || offset < previousOffset;\n      previousOffset = offset;\n      offsets.push(offset);\n      return style;\n    });\n\n    if (keyframesOutOfRange) {\n      context.errors.push(`Please ensure that all keyframe offsets are between 0 and 1`);\n    }\n\n    if (offsetsOutOfOrder) {\n      context.errors.push(`Please ensure that all keyframe offsets are in order`);\n    }\n\n    const length = metadata.steps.length;\n    let generatedOffset = 0;\n    if (totalKeyframesWithOffsets > 0 && totalKeyframesWithOffsets < length) {\n      context.errors.push(`Not all style() steps within the declared keyframes() contain offsets`);\n    } else if (totalKeyframesWithOffsets == 0) {\n      generatedOffset = MAX_KEYFRAME_OFFSET / (length - 1);\n    }\n\n    const limit = length - 1;\n    const currentTime = context.currentTime;\n    const currentAnimateTimings = context.currentAnimateTimings!;\n    const animateDuration = currentAnimateTimings.duration;\n    keyframes.forEach((kf, i) => {\n      const offset = generatedOffset > 0 ? (i == limit ? 1 : (generatedOffset * i)) : offsets[i];\n      const durationUpToThisFrame = offset * animateDuration;\n      context.currentTime = currentTime + currentAnimateTimings.delay + durationUpToThisFrame;\n      currentAnimateTimings.duration = durationUpToThisFrame;\n      this._validateStyleAst(kf, context);\n      kf.offset = offset;\n\n      ast.styles.push(kf);\n    });\n\n    return ast;\n  }\n\n  visitReference(metadata: AnimationReferenceMetadata, context: AnimationAstBuilderContext):\n      ReferenceAst {\n    return {\n      type: AnimationMetadataType.Reference,\n      animation: visitDslNode(this, normalizeAnimationEntry(metadata.animation), context),\n      options: normalizeAnimationOptions(metadata.options)\n    };\n  }\n\n  visitAnimateChild(metadata: AnimationAnimateChildMetadata, context: AnimationAstBuilderContext):\n      AnimateChildAst {\n    context.depCount++;\n    return {\n      type: AnimationMetadataType.AnimateChild,\n      options: normalizeAnimationOptions(metadata.options)\n    };\n  }\n\n  visitAnimateRef(metadata: AnimationAnimateRefMetadata, context: AnimationAstBuilderContext):\n      AnimateRefAst {\n    return {\n      type: AnimationMetadataType.AnimateRef,\n      animation: this.visitReference(metadata.animation, context),\n      options: normalizeAnimationOptions(metadata.options)\n    };\n  }\n\n  visitQuery(metadata: AnimationQueryMetadata, context: AnimationAstBuilderContext): QueryAst {\n    const parentSelector = context.currentQuerySelector!;\n    const options = (metadata.options || {}) as AnimationQueryOptions;\n\n    context.queryCount++;\n    context.currentQuery = metadata;\n    const [selector, includeSelf] = normalizeSelector(metadata.selector);\n    context.currentQuerySelector =\n        parentSelector.length ? (parentSelector + ' ' + selector) : selector;\n    getOrSetAsInMap(context.collectedStyles, context.currentQuerySelector, {});\n\n    const animation = visitDslNode(this, normalizeAnimationEntry(metadata.animation), context);\n    context.currentQuery = null;\n    context.currentQuerySelector = parentSelector;\n\n    return {\n      type: AnimationMetadataType.Query,\n      selector,\n      limit: options.limit || 0,\n      optional: !!options.optional,\n      includeSelf,\n      animation,\n      originalSelector: metadata.selector,\n      options: normalizeAnimationOptions(metadata.options)\n    };\n  }\n\n  visitStagger(metadata: AnimationStaggerMetadata, context: AnimationAstBuilderContext):\n      StaggerAst {\n    if (!context.currentQuery) {\n      context.errors.push(`stagger() can only be used inside of query()`);\n    }\n    const timings = metadata.timings === 'full' ?\n        {duration: 0, delay: 0, easing: 'full'} :\n        resolveTiming(metadata.timings, context.errors, true);\n\n    return {\n      type: AnimationMetadataType.Stagger,\n      animation: visitDslNode(this, normalizeAnimationEntry(metadata.animation), context),\n      timings,\n      options: null\n    };\n  }\n}\n\nfunction normalizeSelector(selector: string): [string, boolean] {\n  const hasAmpersand = selector.split(/\\s*,\\s*/).find(token => token == SELF_TOKEN) ? true : false;\n  if (hasAmpersand) {\n    selector = selector.replace(SELF_TOKEN_REGEX, '');\n  }\n\n  // the :enter and :leave selectors are filled in at runtime during timeline building\n  selector = selector.replace(/@\\*/g, NG_TRIGGER_SELECTOR)\n                 .replace(/@\\w+/g, match => NG_TRIGGER_SELECTOR + '-' + match.substr(1))\n                 .replace(/:animating/g, NG_ANIMATING_SELECTOR);\n\n  return [selector, hasAmpersand];\n}\n\n\nfunction normalizeParams(obj: {[key: string]: any}|any): {[key: string]: any}|null {\n  return obj ? copyObj(obj) : null;\n}\n\nexport type StyleTimeTuple = {\n  startTime: number; endTime: number;\n};\n\nexport class AnimationAstBuilderContext {\n  public queryCount: number = 0;\n  public depCount: number = 0;\n  public currentTransition: AnimationTransitionMetadata|null = null;\n  public currentQuery: AnimationQueryMetadata|null = null;\n  public currentQuerySelector: string|null = null;\n  public currentAnimateTimings: TimingAst|null = null;\n  public currentTime: number = 0;\n  public collectedStyles: {[selectorName: string]: {[propName: string]: StyleTimeTuple}} = {};\n  public options: AnimationOptions|null = null;\n  constructor(public errors: any[]) {}\n}\n\nfunction consumeOffset(styles: ɵStyleData|string|(ɵStyleData | string)[]): number|null {\n  if (typeof styles == 'string') return null;\n\n  let offset: number|null = null;\n\n  if (Array.isArray(styles)) {\n    styles.forEach(styleTuple => {\n      if (isObject(styleTuple) && styleTuple.hasOwnProperty('offset')) {\n        const obj = styleTuple as ɵStyleData;\n        offset = parseFloat(obj['offset'] as string);\n        delete obj['offset'];\n      }\n    });\n  } else if (isObject(styles) && styles.hasOwnProperty('offset')) {\n    const obj = styles;\n    offset = parseFloat(obj['offset'] as string);\n    delete obj['offset'];\n  }\n  return offset;\n}\n\nfunction isObject(value: any): boolean {\n  return !Array.isArray(value) && typeof value == 'object';\n}\n\nfunction constructTimingAst(value: string|number|AnimateTimings, errors: any[]) {\n  let timings: AnimateTimings|null = null;\n  if (value.hasOwnProperty('duration')) {\n    timings = value as AnimateTimings;\n  } else if (typeof value == 'number') {\n    const duration = resolveTiming(value, errors).duration;\n    return makeTimingAst(duration, 0, '');\n  }\n\n  const strValue = value as string;\n  const isDynamic = strValue.split(/\\s+/).some(v => v.charAt(0) == '{' && v.charAt(1) == '{');\n  if (isDynamic) {\n    const ast = makeTimingAst(0, 0, '') as any;\n    ast.dynamic = true;\n    ast.strValue = strValue;\n    return ast as DynamicTimingAst;\n  }\n\n  timings = timings || resolveTiming(strValue, errors);\n  return makeTimingAst(timings.duration, timings.delay, timings.easing);\n}\n\nfunction normalizeAnimationOptions(options: AnimationOptions|null): AnimationOptions {\n  if (options) {\n    options = copyObj(options);\n    if (options['params']) {\n      options['params'] = normalizeParams(options['params'])!;\n    }\n  } else {\n    options = {};\n  }\n  return options;\n}\n\nfunction makeTimingAst(duration: number, delay: number, easing: string|null): TimingAst {\n  return {duration, delay, easing};\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {ɵStyleData} from '@angular/animations';\nimport {AnimationEngineInstruction, AnimationTransitionInstructionType} from '../render/animation_engine_instruction';\n\nexport interface AnimationTimelineInstruction extends AnimationEngineInstruction {\n  element: any;\n  keyframes: ɵStyleData[];\n  preStyleProps: string[];\n  postStyleProps: string[];\n  duration: number;\n  delay: number;\n  totalTime: number;\n  easing: string|null;\n  stretchStartingKeyframe?: boolean;\n  subTimeline: boolean;\n}\n\nexport function createTimelineInstruction(\n    element: any, keyframes: ɵStyleData[], preStyleProps: string[], postStyleProps: string[],\n    duration: number, delay: number, easing: string|null = null,\n    subTimeline: boolean = false): AnimationTimelineInstruction {\n  return {\n    type: AnimationTransitionInstructionType.TimelineAnimation,\n    element,\n    keyframes,\n    preStyleProps,\n    postStyleProps,\n    duration,\n    delay,\n    totalTime: duration + delay,\n    easing,\n    subTimeline\n  };\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {AnimationTimelineInstruction} from './animation_timeline_instruction';\n\nexport class ElementInstructionMap {\n  private _map = new Map<any, AnimationTimelineInstruction[]>();\n\n  consume(element: any): AnimationTimelineInstruction[] {\n    let instructions = this._map.get(element);\n    if (instructions) {\n      this._map.delete(element);\n    } else {\n      instructions = [];\n    }\n    return instructions;\n  }\n\n  append(element: any, instructions: AnimationTimelineInstruction[]) {\n    let existingInstructions = this._map.get(element);\n    if (!existingInstructions) {\n      this._map.set(element, existingInstructions = []);\n    }\n    existingInstructions.push(...instructions);\n  }\n\n  has(element: any): boolean {\n    return this._map.has(element);\n  }\n\n  clear() {\n    this._map.clear();\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {AnimateChildOptions, AnimateTimings, AnimationMetadataType, AnimationOptions, AnimationQueryOptions, AUTO_STYLE, ɵPRE_STYLE as PRE_STYLE, ɵStyleData} from '@angular/animations';\n\nimport {AnimationDriver} from '../render/animation_driver';\nimport {copyObj, copyStyles, interpolateParams, iteratorToArray, resolveTiming, resolveTimingValue, visitDslNode} from '../util';\n\nimport {AnimateAst, AnimateChildAst, AnimateRefAst, Ast, AstVisitor, DynamicTimingAst, GroupAst, KeyframesAst, QueryAst, ReferenceAst, SequenceAst, StaggerAst, StateAst, StyleAst, TimingAst, TransitionAst, TriggerAst} from './animation_ast';\nimport {AnimationTimelineInstruction, createTimelineInstruction} from './animation_timeline_instruction';\nimport {ElementInstructionMap} from './element_instruction_map';\n\nconst ONE_FRAME_IN_MILLISECONDS = 1;\nconst ENTER_TOKEN = ':enter';\nconst ENTER_TOKEN_REGEX = new RegExp(ENTER_TOKEN, 'g');\nconst LEAVE_TOKEN = ':leave';\nconst LEAVE_TOKEN_REGEX = new RegExp(LEAVE_TOKEN, 'g');\n\n/*\n * The code within this file aims to generate web-animations-compatible keyframes from Angular's\n * animation DSL code.\n *\n * The code below will be converted from:\n *\n * ```\n * sequence([\n *   style({ opacity: 0 }),\n *   animate(1000, style({ opacity: 0 }))\n * ])\n * ```\n *\n * To:\n * ```\n * keyframes = [{ opacity: 0, offset: 0 }, { opacity: 1, offset: 1 }]\n * duration = 1000\n * delay = 0\n * easing = ''\n * ```\n *\n * For this operation to cover the combination of animation verbs (style, animate, group, etc...) a\n * combination of prototypical inheritance, AST traversal and merge-sort-like algorithms are used.\n *\n * [AST Traversal]\n * Each of the animation verbs, when executed, will return an string-map object representing what\n * type of action it is (style, animate, group, etc...) and the data associated with it. This means\n * that when functional composition mix of these functions is evaluated (like in the example above)\n * then it will end up producing a tree of objects representing the animation itself.\n *\n * When this animation object tree is processed by the visitor code below it will visit each of the\n * verb statements within the visitor. And during each visit it will build the context of the\n * animation keyframes by interacting with the `TimelineBuilder`.\n *\n * [TimelineBuilder]\n * This class is responsible for tracking the styles and building a series of keyframe objects for a\n * timeline between a start and end time. The builder starts off with an initial timeline and each\n * time the AST comes across a `group()`, `keyframes()` or a combination of the two wihtin a\n * `sequence()` then it will generate a sub timeline for each step as well as a new one after\n * they are complete.\n *\n * As the AST is traversed, the timing state on each of the timelines will be incremented. If a sub\n * timeline was created (based on one of the cases above) then the parent timeline will attempt to\n * merge the styles used within the sub timelines into itself (only with group() this will happen).\n * This happens with a merge operation (much like how the merge works in mergesort) and it will only\n * copy the most recently used styles from the sub timelines into the parent timeline. This ensures\n * that if the styles are used later on in another phase of the animation then they will be the most\n * up-to-date values.\n *\n * [How Missing Styles Are Updated]\n * Each timeline has a `backFill` property which is responsible for filling in new styles into\n * already processed keyframes if a new style shows up later within the animation sequence.\n *\n * ```\n * sequence([\n *   style({ width: 0 }),\n *   animate(1000, style({ width: 100 })),\n *   animate(1000, style({ width: 200 })),\n *   animate(1000, style({ width: 300 }))\n *   animate(1000, style({ width: 400, height: 400 })) // notice how `height` doesn't exist anywhere\n * else\n * ])\n * ```\n *\n * What is happening here is that the `height` value is added later in the sequence, but is missing\n * from all previous animation steps. Therefore when a keyframe is created it would also be missing\n * from all previous keyframes up until where it is first used. For the timeline keyframe generation\n * to properly fill in the style it will place the previous value (the value from the parent\n * timeline) or a default value of `*` into the backFill object. Given that each of the keyframe\n * styles are objects that prototypically inhert from the backFill object, this means that if a\n * value is added into the backFill then it will automatically propagate any missing values to all\n * keyframes. Therefore the missing `height` value will be properly filled into the already\n * processed keyframes.\n *\n * When a sub-timeline is created it will have its own backFill property. This is done so that\n * styles present within the sub-timeline do not accidentally seep into the previous/future timeline\n * keyframes\n *\n * (For prototypically-inherited contents to be detected a `for(i in obj)` loop must be used.)\n *\n * [Validation]\n * The code in this file is not responsible for validation. That functionality happens with within\n * the `AnimationValidatorVisitor` code.\n */\nexport function buildAnimationTimelines(\n    driver: AnimationDriver, rootElement: any, ast: Ast<AnimationMetadataType>,\n    enterClassName: string, leaveClassName: string, startingStyles: ɵStyleData = {},\n    finalStyles: ɵStyleData = {}, options: AnimationOptions,\n    subInstructions?: ElementInstructionMap, errors: any[] = []): AnimationTimelineInstruction[] {\n  return new AnimationTimelineBuilderVisitor().buildKeyframes(\n      driver, rootElement, ast, enterClassName, leaveClassName, startingStyles, finalStyles,\n      options, subInstructions, errors);\n}\n\nexport class AnimationTimelineBuilderVisitor implements AstVisitor {\n  buildKeyframes(\n      driver: AnimationDriver, rootElement: any, ast: Ast<AnimationMetadataType>,\n      enterClassName: string, leaveClassName: string, startingStyles: ɵStyleData,\n      finalStyles: ɵStyleData, options: AnimationOptions, subInstructions?: ElementInstructionMap,\n      errors: any[] = []): AnimationTimelineInstruction[] {\n    subInstructions = subInstructions || new ElementInstructionMap();\n    const context = new AnimationTimelineContext(\n        driver, rootElement, subInstructions, enterClassName, leaveClassName, errors, []);\n    context.options = options;\n    context.currentTimeline.setStyles([startingStyles], null, context.errors, options);\n\n    visitDslNode(this, ast, context);\n\n    // this checks to see if an actual animation happened\n    const timelines = context.timelines.filter(timeline => timeline.containsAnimation());\n    if (timelines.length && Object.keys(finalStyles).length) {\n      const tl = timelines[timelines.length - 1];\n      if (!tl.allowOnlyTimelineStyles()) {\n        tl.setStyles([finalStyles], null, context.errors, options);\n      }\n    }\n\n    return timelines.length ? timelines.map(timeline => timeline.buildKeyframes()) :\n                              [createTimelineInstruction(rootElement, [], [], [], 0, 0, '', false)];\n  }\n\n  visitTrigger(ast: TriggerAst, context: AnimationTimelineContext): any {\n    // these values are not visited in this AST\n  }\n\n  visitState(ast: StateAst, context: AnimationTimelineContext): any {\n    // these values are not visited in this AST\n  }\n\n  visitTransition(ast: TransitionAst, context: AnimationTimelineContext): any {\n    // these values are not visited in this AST\n  }\n\n  visitAnimateChild(ast: AnimateChildAst, context: AnimationTimelineContext): any {\n    const elementInstructions = context.subInstructions.consume(context.element);\n    if (elementInstructions) {\n      const innerContext = context.createSubContext(ast.options);\n      const startTime = context.currentTimeline.currentTime;\n      const endTime = this._visitSubInstructions(\n          elementInstructions, innerContext, innerContext.options as AnimateChildOptions);\n      if (startTime != endTime) {\n        // we do this on the upper context because we created a sub context for\n        // the sub child animations\n        context.transformIntoNewTimeline(endTime);\n      }\n    }\n    context.previousNode = ast;\n  }\n\n  visitAnimateRef(ast: AnimateRefAst, context: AnimationTimelineContext): any {\n    const innerContext = context.createSubContext(ast.options);\n    innerContext.transformIntoNewTimeline();\n    this.visitReference(ast.animation, innerContext);\n    context.transformIntoNewTimeline(innerContext.currentTimeline.currentTime);\n    context.previousNode = ast;\n  }\n\n  private _visitSubInstructions(\n      instructions: AnimationTimelineInstruction[], context: AnimationTimelineContext,\n      options: AnimateChildOptions): number {\n    const startTime = context.currentTimeline.currentTime;\n    let furthestTime = startTime;\n\n    // this is a special-case for when a user wants to skip a sub\n    // animation from being fired entirely.\n    const duration = options.duration != null ? resolveTimingValue(options.duration) : null;\n    const delay = options.delay != null ? resolveTimingValue(options.delay) : null;\n    if (duration !== 0) {\n      instructions.forEach(instruction => {\n        const instructionTimings =\n            context.appendInstructionToTimeline(instruction, duration, delay);\n        furthestTime =\n            Math.max(furthestTime, instructionTimings.duration + instructionTimings.delay);\n      });\n    }\n\n    return furthestTime;\n  }\n\n  visitReference(ast: ReferenceAst, context: AnimationTimelineContext) {\n    context.updateOptions(ast.options, true);\n    visitDslNode(this, ast.animation, context);\n    context.previousNode = ast;\n  }\n\n  visitSequence(ast: SequenceAst, context: AnimationTimelineContext) {\n    const subContextCount = context.subContextCount;\n    let ctx = context;\n    const options = ast.options;\n\n    if (options && (options.params || options.delay)) {\n      ctx = context.createSubContext(options);\n      ctx.transformIntoNewTimeline();\n\n      if (options.delay != null) {\n        if (ctx.previousNode.type == AnimationMetadataType.Style) {\n          ctx.currentTimeline.snapshotCurrentStyles();\n          ctx.previousNode = DEFAULT_NOOP_PREVIOUS_NODE;\n        }\n\n        const delay = resolveTimingValue(options.delay);\n        ctx.delayNextStep(delay);\n      }\n    }\n\n    if (ast.steps.length) {\n      ast.steps.forEach(s => visitDslNode(this, s, ctx));\n\n      // this is here just incase the inner steps only contain or end with a style() call\n      ctx.currentTimeline.applyStylesToKeyframe();\n\n      // this means that some animation function within the sequence\n      // ended up creating a sub timeline (which means the current\n      // timeline cannot overlap with the contents of the sequence)\n      if (ctx.subContextCount > subContextCount) {\n        ctx.transformIntoNewTimeline();\n      }\n    }\n\n    context.previousNode = ast;\n  }\n\n  visitGroup(ast: GroupAst, context: AnimationTimelineContext) {\n    const innerTimelines: TimelineBuilder[] = [];\n    let furthestTime = context.currentTimeline.currentTime;\n    const delay = ast.options && ast.options.delay ? resolveTimingValue(ast.options.delay) : 0;\n\n    ast.steps.forEach(s => {\n      const innerContext = context.createSubContext(ast.options);\n      if (delay) {\n        innerContext.delayNextStep(delay);\n      }\n\n      visitDslNode(this, s, innerContext);\n      furthestTime = Math.max(furthestTime, innerContext.currentTimeline.currentTime);\n      innerTimelines.push(innerContext.currentTimeline);\n    });\n\n    // this operation is run after the AST loop because otherwise\n    // if the parent timeline's collected styles were updated then\n    // it would pass in invalid data into the new-to-be forked items\n    innerTimelines.forEach(\n        timeline => context.currentTimeline.mergeTimelineCollectedStyles(timeline));\n    context.transformIntoNewTimeline(furthestTime);\n    context.previousNode = ast;\n  }\n\n  private _visitTiming(ast: TimingAst, context: AnimationTimelineContext): AnimateTimings {\n    if ((ast as DynamicTimingAst).dynamic) {\n      const strValue = (ast as DynamicTimingAst).strValue;\n      const timingValue =\n          context.params ? interpolateParams(strValue, context.params, context.errors) : strValue;\n      return resolveTiming(timingValue, context.errors);\n    } else {\n      return {duration: ast.duration, delay: ast.delay, easing: ast.easing};\n    }\n  }\n\n  visitAnimate(ast: AnimateAst, context: AnimationTimelineContext) {\n    const timings = context.currentAnimateTimings = this._visitTiming(ast.timings, context);\n    const timeline = context.currentTimeline;\n    if (timings.delay) {\n      context.incrementTime(timings.delay);\n      timeline.snapshotCurrentStyles();\n    }\n\n    const style = ast.style;\n    if (style.type == AnimationMetadataType.Keyframes) {\n      this.visitKeyframes(style, context);\n    } else {\n      context.incrementTime(timings.duration);\n      this.visitStyle(style as StyleAst, context);\n      timeline.applyStylesToKeyframe();\n    }\n\n    context.currentAnimateTimings = null;\n    context.previousNode = ast;\n  }\n\n  visitStyle(ast: StyleAst, context: AnimationTimelineContext) {\n    const timeline = context.currentTimeline;\n    const timings = context.currentAnimateTimings!;\n\n    // this is a special case for when a style() call\n    // directly follows  an animate() call (but not inside of an animate() call)\n    if (!timings && timeline.getCurrentStyleProperties().length) {\n      timeline.forwardFrame();\n    }\n\n    const easing = (timings && timings.easing) || ast.easing;\n    if (ast.isEmptyStep) {\n      timeline.applyEmptyStep(easing);\n    } else {\n      timeline.setStyles(ast.styles, easing, context.errors, context.options);\n    }\n\n    context.previousNode = ast;\n  }\n\n  visitKeyframes(ast: KeyframesAst, context: AnimationTimelineContext) {\n    const currentAnimateTimings = context.currentAnimateTimings!;\n    const startTime = (context.currentTimeline!).duration;\n    const duration = currentAnimateTimings.duration;\n    const innerContext = context.createSubContext();\n    const innerTimeline = innerContext.currentTimeline;\n    innerTimeline.easing = currentAnimateTimings.easing;\n\n    ast.styles.forEach(step => {\n      const offset: number = step.offset || 0;\n      innerTimeline.forwardTime(offset * duration);\n      innerTimeline.setStyles(step.styles, step.easing, context.errors, context.options);\n      innerTimeline.applyStylesToKeyframe();\n    });\n\n    // this will ensure that the parent timeline gets all the styles from\n    // the child even if the new timeline below is not used\n    context.currentTimeline.mergeTimelineCollectedStyles(innerTimeline);\n\n    // we do this because the window between this timeline and the sub timeline\n    // should ensure that the styles within are exactly the same as they were before\n    context.transformIntoNewTimeline(startTime + duration);\n    context.previousNode = ast;\n  }\n\n  visitQuery(ast: QueryAst, context: AnimationTimelineContext) {\n    // in the event that the first step before this is a style step we need\n    // to ensure the styles are applied before the children are animated\n    const startTime = context.currentTimeline.currentTime;\n    const options = (ast.options || {}) as AnimationQueryOptions;\n    const delay = options.delay ? resolveTimingValue(options.delay) : 0;\n\n    if (delay &&\n        (context.previousNode.type === AnimationMetadataType.Style ||\n         (startTime == 0 && context.currentTimeline.getCurrentStyleProperties().length))) {\n      context.currentTimeline.snapshotCurrentStyles();\n      context.previousNode = DEFAULT_NOOP_PREVIOUS_NODE;\n    }\n\n    let furthestTime = startTime;\n    const elms = context.invokeQuery(\n        ast.selector, ast.originalSelector, ast.limit, ast.includeSelf,\n        options.optional ? true : false, context.errors);\n\n    context.currentQueryTotal = elms.length;\n    let sameElementTimeline: TimelineBuilder|null = null;\n    elms.forEach((element, i) => {\n      context.currentQueryIndex = i;\n      const innerContext = context.createSubContext(ast.options, element);\n      if (delay) {\n        innerContext.delayNextStep(delay);\n      }\n\n      if (element === context.element) {\n        sameElementTimeline = innerContext.currentTimeline;\n      }\n\n      visitDslNode(this, ast.animation, innerContext);\n\n      // this is here just incase the inner steps only contain or end\n      // with a style() call (which is here to signal that this is a preparatory\n      // call to style an element before it is animated again)\n      innerContext.currentTimeline.applyStylesToKeyframe();\n\n      const endTime = innerContext.currentTimeline.currentTime;\n      furthestTime = Math.max(furthestTime, endTime);\n    });\n\n    context.currentQueryIndex = 0;\n    context.currentQueryTotal = 0;\n    context.transformIntoNewTimeline(furthestTime);\n\n    if (sameElementTimeline) {\n      context.currentTimeline.mergeTimelineCollectedStyles(sameElementTimeline);\n      context.currentTimeline.snapshotCurrentStyles();\n    }\n\n    context.previousNode = ast;\n  }\n\n  visitStagger(ast: StaggerAst, context: AnimationTimelineContext) {\n    const parentContext = context.parentContext!;\n    const tl = context.currentTimeline;\n    const timings = ast.timings;\n    const duration = Math.abs(timings.duration);\n    const maxTime = duration * (context.currentQueryTotal - 1);\n    let delay = duration * context.currentQueryIndex;\n\n    let staggerTransformer = timings.duration < 0 ? 'reverse' : timings.easing;\n    switch (staggerTransformer) {\n      case 'reverse':\n        delay = maxTime - delay;\n        break;\n      case 'full':\n        delay = parentContext.currentStaggerTime;\n        break;\n    }\n\n    const timeline = context.currentTimeline;\n    if (delay) {\n      timeline.delayNextStep(delay);\n    }\n\n    const startingTime = timeline.currentTime;\n    visitDslNode(this, ast.animation, context);\n    context.previousNode = ast;\n\n    // time = duration + delay\n    // the reason why this computation is so complex is because\n    // the inner timeline may either have a delay value or a stretched\n    // keyframe depending on if a subtimeline is not used or is used.\n    parentContext.currentStaggerTime =\n        (tl.currentTime - startingTime) + (tl.startTime - parentContext.currentTimeline.startTime);\n  }\n}\n\nexport declare type StyleAtTime = {\n  time: number; value: string | number;\n};\n\nconst DEFAULT_NOOP_PREVIOUS_NODE = <Ast<AnimationMetadataType>>{};\nexport class AnimationTimelineContext {\n  public parentContext: AnimationTimelineContext|null = null;\n  public currentTimeline: TimelineBuilder;\n  public currentAnimateTimings: AnimateTimings|null = null;\n  public previousNode: Ast<AnimationMetadataType> = DEFAULT_NOOP_PREVIOUS_NODE;\n  public subContextCount = 0;\n  public options: AnimationOptions = {};\n  public currentQueryIndex: number = 0;\n  public currentQueryTotal: number = 0;\n  public currentStaggerTime: number = 0;\n\n  constructor(\n      private _driver: AnimationDriver, public element: any,\n      public subInstructions: ElementInstructionMap, private _enterClassName: string,\n      private _leaveClassName: string, public errors: any[], public timelines: TimelineBuilder[],\n      initialTimeline?: TimelineBuilder) {\n    this.currentTimeline = initialTimeline || new TimelineBuilder(this._driver, element, 0);\n    timelines.push(this.currentTimeline);\n  }\n\n  get params() {\n    return this.options.params;\n  }\n\n  updateOptions(options: AnimationOptions|null, skipIfExists?: boolean) {\n    if (!options) return;\n\n    const newOptions = options as any;\n    let optionsToUpdate = this.options;\n\n    // NOTE: this will get patched up when other animation methods support duration overrides\n    if (newOptions.duration != null) {\n      (optionsToUpdate as any).duration = resolveTimingValue(newOptions.duration);\n    }\n\n    if (newOptions.delay != null) {\n      optionsToUpdate.delay = resolveTimingValue(newOptions.delay);\n    }\n\n    const newParams = newOptions.params;\n    if (newParams) {\n      let paramsToUpdate: {[name: string]: any} = optionsToUpdate.params!;\n      if (!paramsToUpdate) {\n        paramsToUpdate = this.options.params = {};\n      }\n\n      Object.keys(newParams).forEach(name => {\n        if (!skipIfExists || !paramsToUpdate.hasOwnProperty(name)) {\n          paramsToUpdate[name] = interpolateParams(newParams[name], paramsToUpdate, this.errors);\n        }\n      });\n    }\n  }\n\n  private _copyOptions() {\n    const options: AnimationOptions = {};\n    if (this.options) {\n      const oldParams = this.options.params;\n      if (oldParams) {\n        const params: {[name: string]: any} = options['params'] = {};\n        Object.keys(oldParams).forEach(name => {\n          params[name] = oldParams[name];\n        });\n      }\n    }\n    return options;\n  }\n\n  createSubContext(options: AnimationOptions|null = null, element?: any, newTime?: number):\n      AnimationTimelineContext {\n    const target = element || this.element;\n    const context = new AnimationTimelineContext(\n        this._driver, target, this.subInstructions, this._enterClassName, this._leaveClassName,\n        this.errors, this.timelines, this.currentTimeline.fork(target, newTime || 0));\n    context.previousNode = this.previousNode;\n    context.currentAnimateTimings = this.currentAnimateTimings;\n\n    context.options = this._copyOptions();\n    context.updateOptions(options);\n\n    context.currentQueryIndex = this.currentQueryIndex;\n    context.currentQueryTotal = this.currentQueryTotal;\n    context.parentContext = this;\n    this.subContextCount++;\n    return context;\n  }\n\n  transformIntoNewTimeline(newTime?: number) {\n    this.previousNode = DEFAULT_NOOP_PREVIOUS_NODE;\n    this.currentTimeline = this.currentTimeline.fork(this.element, newTime);\n    this.timelines.push(this.currentTimeline);\n    return this.currentTimeline;\n  }\n\n  appendInstructionToTimeline(\n      instruction: AnimationTimelineInstruction, duration: number|null,\n      delay: number|null): AnimateTimings {\n    const updatedTimings: AnimateTimings = {\n      duration: duration != null ? duration : instruction.duration,\n      delay: this.currentTimeline.currentTime + (delay != null ? delay : 0) + instruction.delay,\n      easing: ''\n    };\n    const builder = new SubTimelineBuilder(\n        this._driver, instruction.element, instruction.keyframes, instruction.preStyleProps,\n        instruction.postStyleProps, updatedTimings, instruction.stretchStartingKeyframe);\n    this.timelines.push(builder);\n    return updatedTimings;\n  }\n\n  incrementTime(time: number) {\n    this.currentTimeline.forwardTime(this.currentTimeline.duration + time);\n  }\n\n  delayNextStep(delay: number) {\n    // negative delays are not yet supported\n    if (delay > 0) {\n      this.currentTimeline.delayNextStep(delay);\n    }\n  }\n\n  invokeQuery(\n      selector: string, originalSelector: string, limit: number, includeSelf: boolean,\n      optional: boolean, errors: any[]): any[] {\n    let results: any[] = [];\n    if (includeSelf) {\n      results.push(this.element);\n    }\n    if (selector.length > 0) {  // if :self is only used then the selector is empty\n      selector = selector.replace(ENTER_TOKEN_REGEX, '.' + this._enterClassName);\n      selector = selector.replace(LEAVE_TOKEN_REGEX, '.' + this._leaveClassName);\n      const multi = limit != 1;\n      let elements = this._driver.query(this.element, selector, multi);\n      if (limit !== 0) {\n        elements = limit < 0 ? elements.slice(elements.length + limit, elements.length) :\n                               elements.slice(0, limit);\n      }\n      results.push(...elements);\n    }\n\n    if (!optional && results.length == 0) {\n      errors.push(`\\`query(\"${originalSelector}\")\\` returned zero elements. (Use \\`query(\"${\n          originalSelector}\", { optional: true })\\` if you wish to allow this.)`);\n    }\n    return results;\n  }\n}\n\n\nexport class TimelineBuilder {\n  public duration: number = 0;\n  // TODO(issue/24571): remove '!'.\n  public easing!: string|null;\n  private _previousKeyframe: ɵStyleData = {};\n  private _currentKeyframe: ɵStyleData = {};\n  private _keyframes = new Map<number, ɵStyleData>();\n  private _styleSummary: {[prop: string]: StyleAtTime} = {};\n  private _localTimelineStyles: ɵStyleData;\n  private _globalTimelineStyles: ɵStyleData;\n  private _pendingStyles: ɵStyleData = {};\n  private _backFill: ɵStyleData = {};\n  private _currentEmptyStepKeyframe: ɵStyleData|null = null;\n\n  constructor(\n      private _driver: AnimationDriver, public element: any, public startTime: number,\n      private _elementTimelineStylesLookup?: Map<any, ɵStyleData>) {\n    if (!this._elementTimelineStylesLookup) {\n      this._elementTimelineStylesLookup = new Map<any, ɵStyleData>();\n    }\n\n    this._localTimelineStyles = Object.create(this._backFill, {});\n    this._globalTimelineStyles = this._elementTimelineStylesLookup.get(element)!;\n    if (!this._globalTimelineStyles) {\n      this._globalTimelineStyles = this._localTimelineStyles;\n      this._elementTimelineStylesLookup.set(element, this._localTimelineStyles);\n    }\n    this._loadKeyframe();\n  }\n\n  containsAnimation(): boolean {\n    switch (this._keyframes.size) {\n      case 0:\n        return false;\n      case 1:\n        return this.getCurrentStyleProperties().length > 0;\n      default:\n        return true;\n    }\n  }\n\n  getCurrentStyleProperties(): string[] {\n    return Object.keys(this._currentKeyframe);\n  }\n\n  get currentTime() {\n    return this.startTime + this.duration;\n  }\n\n  delayNextStep(delay: number) {\n    // in the event that a style() step is placed right before a stagger()\n    // and that style() step is the very first style() value in the animation\n    // then we need to make a copy of the keyframe [0, copy, 1] so that the delay\n    // properly applies the style() values to work with the stagger...\n    const hasPreStyleStep = this._keyframes.size == 1 && Object.keys(this._pendingStyles).length;\n\n    if (this.duration || hasPreStyleStep) {\n      this.forwardTime(this.currentTime + delay);\n      if (hasPreStyleStep) {\n        this.snapshotCurrentStyles();\n      }\n    } else {\n      this.startTime += delay;\n    }\n  }\n\n  fork(element: any, currentTime?: number): TimelineBuilder {\n    this.applyStylesToKeyframe();\n    return new TimelineBuilder(\n        this._driver, element, currentTime || this.currentTime, this._elementTimelineStylesLookup);\n  }\n\n  private _loadKeyframe() {\n    if (this._currentKeyframe) {\n      this._previousKeyframe = this._currentKeyframe;\n    }\n    this._currentKeyframe = this._keyframes.get(this.duration)!;\n    if (!this._currentKeyframe) {\n      this._currentKeyframe = Object.create(this._backFill, {});\n      this._keyframes.set(this.duration, this._currentKeyframe);\n    }\n  }\n\n  forwardFrame() {\n    this.duration += ONE_FRAME_IN_MILLISECONDS;\n    this._loadKeyframe();\n  }\n\n  forwardTime(time: number) {\n    this.applyStylesToKeyframe();\n    this.duration = time;\n    this._loadKeyframe();\n  }\n\n  private _updateStyle(prop: string, value: string|number) {\n    this._localTimelineStyles[prop] = value;\n    this._globalTimelineStyles[prop] = value;\n    this._styleSummary[prop] = {time: this.currentTime, value};\n  }\n\n  allowOnlyTimelineStyles() {\n    return this._currentEmptyStepKeyframe !== this._currentKeyframe;\n  }\n\n  applyEmptyStep(easing: string|null) {\n    if (easing) {\n      this._previousKeyframe['easing'] = easing;\n    }\n\n    // special case for animate(duration):\n    // all missing styles are filled with a `*` value then\n    // if any destination styles are filled in later on the same\n    // keyframe then they will override the overridden styles\n    // We use `_globalTimelineStyles` here because there may be\n    // styles in previous keyframes that are not present in this timeline\n    Object.keys(this._globalTimelineStyles).forEach(prop => {\n      this._backFill[prop] = this._globalTimelineStyles[prop] || AUTO_STYLE;\n      this._currentKeyframe[prop] = AUTO_STYLE;\n    });\n    this._currentEmptyStepKeyframe = this._currentKeyframe;\n  }\n\n  setStyles(\n      input: (ɵStyleData|string)[], easing: string|null, errors: any[],\n      options?: AnimationOptions) {\n    if (easing) {\n      this._previousKeyframe['easing'] = easing;\n    }\n\n    const params = (options && options.params) || {};\n    const styles = flattenStyles(input, this._globalTimelineStyles);\n    Object.keys(styles).forEach(prop => {\n      const val = interpolateParams(styles[prop], params, errors);\n      this._pendingStyles[prop] = val;\n      if (!this._localTimelineStyles.hasOwnProperty(prop)) {\n        this._backFill[prop] = this._globalTimelineStyles.hasOwnProperty(prop) ?\n            this._globalTimelineStyles[prop] :\n            AUTO_STYLE;\n      }\n      this._updateStyle(prop, val);\n    });\n  }\n\n  applyStylesToKeyframe() {\n    const styles = this._pendingStyles;\n    const props = Object.keys(styles);\n    if (props.length == 0) return;\n\n    this._pendingStyles = {};\n\n    props.forEach(prop => {\n      const val = styles[prop];\n      this._currentKeyframe[prop] = val;\n    });\n\n    Object.keys(this._localTimelineStyles).forEach(prop => {\n      if (!this._currentKeyframe.hasOwnProperty(prop)) {\n        this._currentKeyframe[prop] = this._localTimelineStyles[prop];\n      }\n    });\n  }\n\n  snapshotCurrentStyles() {\n    Object.keys(this._localTimelineStyles).forEach(prop => {\n      const val = this._localTimelineStyles[prop];\n      this._pendingStyles[prop] = val;\n      this._updateStyle(prop, val);\n    });\n  }\n\n  getFinalKeyframe() {\n    return this._keyframes.get(this.duration);\n  }\n\n  get properties() {\n    const properties: string[] = [];\n    for (let prop in this._currentKeyframe) {\n      properties.push(prop);\n    }\n    return properties;\n  }\n\n  mergeTimelineCollectedStyles(timeline: TimelineBuilder) {\n    Object.keys(timeline._styleSummary).forEach(prop => {\n      const details0 = this._styleSummary[prop];\n      const details1 = timeline._styleSummary[prop];\n      if (!details0 || details1.time > details0.time) {\n        this._updateStyle(prop, details1.value);\n      }\n    });\n  }\n\n  buildKeyframes(): AnimationTimelineInstruction {\n    this.applyStylesToKeyframe();\n    const preStyleProps = new Set<string>();\n    const postStyleProps = new Set<string>();\n    const isEmpty = this._keyframes.size === 1 && this.duration === 0;\n\n    let finalKeyframes: ɵStyleData[] = [];\n    this._keyframes.forEach((keyframe, time) => {\n      const finalKeyframe = copyStyles(keyframe, true);\n      Object.keys(finalKeyframe).forEach(prop => {\n        const value = finalKeyframe[prop];\n        if (value == PRE_STYLE) {\n          preStyleProps.add(prop);\n        } else if (value == AUTO_STYLE) {\n          postStyleProps.add(prop);\n        }\n      });\n      if (!isEmpty) {\n        finalKeyframe['offset'] = time / this.duration;\n      }\n      finalKeyframes.push(finalKeyframe);\n    });\n\n    const preProps: string[] = preStyleProps.size ? iteratorToArray(preStyleProps.values()) : [];\n    const postProps: string[] = postStyleProps.size ? iteratorToArray(postStyleProps.values()) : [];\n\n    // special case for a 0-second animation (which is designed just to place styles onscreen)\n    if (isEmpty) {\n      const kf0 = finalKeyframes[0];\n      const kf1 = copyObj(kf0);\n      kf0['offset'] = 0;\n      kf1['offset'] = 1;\n      finalKeyframes = [kf0, kf1];\n    }\n\n    return createTimelineInstruction(\n        this.element, finalKeyframes, preProps, postProps, this.duration, this.startTime,\n        this.easing, false);\n  }\n}\n\nclass SubTimelineBuilder extends TimelineBuilder {\n  public timings: AnimateTimings;\n\n  constructor(\n      driver: AnimationDriver, public element: any, public keyframes: ɵStyleData[],\n      public preStyleProps: string[], public postStyleProps: string[], timings: AnimateTimings,\n      private _stretchStartingKeyframe: boolean = false) {\n    super(driver, element, timings.delay);\n    this.timings = {duration: timings.duration, delay: timings.delay, easing: timings.easing};\n  }\n\n  containsAnimation(): boolean {\n    return this.keyframes.length > 1;\n  }\n\n  buildKeyframes(): AnimationTimelineInstruction {\n    let keyframes = this.keyframes;\n    let {delay, duration, easing} = this.timings;\n    if (this._stretchStartingKeyframe && delay) {\n      const newKeyframes: ɵStyleData[] = [];\n      const totalTime = duration + delay;\n      const startingGap = delay / totalTime;\n\n      // the original starting keyframe now starts once the delay is done\n      const newFirstKeyframe = copyStyles(keyframes[0], false);\n      newFirstKeyframe['offset'] = 0;\n      newKeyframes.push(newFirstKeyframe);\n\n      const oldFirstKeyframe = copyStyles(keyframes[0], false);\n      oldFirstKeyframe['offset'] = roundOffset(startingGap);\n      newKeyframes.push(oldFirstKeyframe);\n\n      /*\n        When the keyframe is stretched then it means that the delay before the animation\n        starts is gone. Instead the first keyframe is placed at the start of the animation\n        and it is then copied to where it starts when the original delay is over. This basically\n        means nothing animates during that delay, but the styles are still renderered. For this\n        to work the original offset values that exist in the original keyframes must be \"warped\"\n        so that they can take the new keyframe + delay into account.\n\n        delay=1000, duration=1000, keyframes = 0 .5 1\n\n        turns into\n\n        delay=0, duration=2000, keyframes = 0 .33 .66 1\n       */\n\n      // offsets between 1 ... n -1 are all warped by the keyframe stretch\n      const limit = keyframes.length - 1;\n      for (let i = 1; i <= limit; i++) {\n        let kf = copyStyles(keyframes[i], false);\n        const oldOffset = kf['offset'] as number;\n        const timeAtKeyframe = delay + oldOffset * duration;\n        kf['offset'] = roundOffset(timeAtKeyframe / totalTime);\n        newKeyframes.push(kf);\n      }\n\n      // the new starting keyframe should be added at the start\n      duration = totalTime;\n      delay = 0;\n      easing = '';\n\n      keyframes = newKeyframes;\n    }\n\n    return createTimelineInstruction(\n        this.element, keyframes, this.preStyleProps, this.postStyleProps, duration, delay, easing,\n        true);\n  }\n}\n\nfunction roundOffset(offset: number, decimalPoints = 3): number {\n  const mult = Math.pow(10, decimalPoints - 1);\n  return Math.round(offset * mult) / mult;\n}\n\nfunction flattenStyles(input: (ɵStyleData|string)[], allStyles: ɵStyleData) {\n  const styles: ɵStyleData = {};\n  let allProperties: string[];\n  input.forEach(token => {\n    if (token === '*') {\n      allProperties = allProperties || Object.keys(allStyles);\n      allProperties.forEach(prop => {\n        styles[prop] = AUTO_STYLE;\n      });\n    } else {\n      copyStyles(token as ɵStyleData, false, styles);\n    }\n  });\n  return styles;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {AnimationMetadata, AnimationMetadataType, AnimationOptions, ɵStyleData} from '@angular/animations';\n\nimport {AnimationDriver} from '../render/animation_driver';\nimport {ENTER_CLASSNAME, LEAVE_CLASSNAME, normalizeStyles} from '../util';\n\nimport {Ast} from './animation_ast';\nimport {buildAnimationAst} from './animation_ast_builder';\nimport {buildAnimationTimelines} from './animation_timeline_builder';\nimport {AnimationTimelineInstruction} from './animation_timeline_instruction';\nimport {ElementInstructionMap} from './element_instruction_map';\n\nexport class Animation {\n  private _animationAst: Ast<AnimationMetadataType>;\n  constructor(private _driver: AnimationDriver, input: AnimationMetadata|AnimationMetadata[]) {\n    const errors: any[] = [];\n    const ast = buildAnimationAst(_driver, input, errors);\n    if (errors.length) {\n      const errorMessage = `animation validation failed:\\n${errors.join('\\n')}`;\n      throw new Error(errorMessage);\n    }\n    this._animationAst = ast;\n  }\n\n  buildTimelines(\n      element: any, startingStyles: ɵStyleData|ɵStyleData[],\n      destinationStyles: ɵStyleData|ɵStyleData[], options: AnimationOptions,\n      subInstructions?: ElementInstructionMap): AnimationTimelineInstruction[] {\n    const start = Array.isArray(startingStyles) ? normalizeStyles(startingStyles) :\n                                                  <ɵStyleData>startingStyles;\n    const dest = Array.isArray(destinationStyles) ? normalizeStyles(destinationStyles) :\n                                                    <ɵStyleData>destinationStyles;\n    const errors: any = [];\n    subInstructions = subInstructions || new ElementInstructionMap();\n    const result = buildAnimationTimelines(\n        this._driver, element, this._animationAst, ENTER_CLASSNAME, LEAVE_CLASSNAME, start, dest,\n        options, subInstructions, errors);\n    if (errors.length) {\n      const errorMessage = `animation building failed:\\n${errors.join('\\n')}`;\n      throw new Error(errorMessage);\n    }\n    return result;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @publicApi\n */\nexport abstract class AnimationStyleNormalizer {\n  abstract normalizePropertyName(propertyName: string, errors: string[]): string;\n  abstract normalizeStyleValue(\n      userProvidedProperty: string, normalizedProperty: string, value: string|number,\n      errors: string[]): string;\n}\n\n/**\n * @publicApi\n */\nexport class NoopAnimationStyleNormalizer {\n  normalizePropertyName(propertyName: string, errors: string[]): string {\n    return propertyName;\n  }\n\n  normalizeStyleValue(\n      userProvidedProperty: string, normalizedProperty: string, value: string|number,\n      errors: string[]): string {\n    return <any>value;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {dashCaseToCamelCase} from '../../util';\n\nimport {AnimationStyleNormalizer} from './animation_style_normalizer';\n\nexport class WebAnimationsStyleNormalizer extends AnimationStyleNormalizer {\n  normalizePropertyName(propertyName: string, errors: string[]): string {\n    return dashCaseToCamelCase(propertyName);\n  }\n\n  normalizeStyleValue(\n      userProvidedProperty: string, normalizedProperty: string, value: string|number,\n      errors: string[]): string {\n    let unit: string = '';\n    const strVal = value.toString().trim();\n\n    if (DIMENSIONAL_PROP_MAP[normalizedProperty] && value !== 0 && value !== '0') {\n      if (typeof value === 'number') {\n        unit = 'px';\n      } else {\n        const valAndSuffixMatch = value.match(/^[+-]?[\\d\\.]+([a-z]*)$/);\n        if (valAndSuffixMatch && valAndSuffixMatch[1].length == 0) {\n          errors.push(`Please provide a CSS unit value for ${userProvidedProperty}:${value}`);\n        }\n      }\n    }\n    return strVal + unit;\n  }\n}\n\nconst DIMENSIONAL_PROP_MAP =\n    (() => makeBooleanMap(\n         'width,height,minWidth,minHeight,maxWidth,maxHeight,left,top,bottom,right,fontSize,outlineWidth,outlineOffset,paddingTop,paddingLeft,paddingBottom,paddingRight,marginTop,marginLeft,marginBottom,marginRight,borderRadius,borderWidth,borderTopWidth,borderLeftWidth,borderRightWidth,borderBottomWidth,textIndent,perspective'\n             .split(',')))();\n\nfunction makeBooleanMap(keys: string[]): {[key: string]: boolean} {\n  const map: {[key: string]: boolean} = {};\n  keys.forEach(key => map[key] = true);\n  return map;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {ɵStyleData} from '@angular/animations';\nimport {AnimationEngineInstruction, AnimationTransitionInstructionType} from '../render/animation_engine_instruction';\nimport {AnimationTimelineInstruction} from './animation_timeline_instruction';\n\nexport interface AnimationTransitionInstruction extends AnimationEngineInstruction {\n  element: any;\n  triggerName: string;\n  isRemovalTransition: boolean;\n  fromState: string;\n  fromStyles: ɵStyleData;\n  toState: string;\n  toStyles: ɵStyleData;\n  timelines: AnimationTimelineInstruction[];\n  queriedElements: any[];\n  preStyleProps: Map<any, {[prop: string]: boolean}>;\n  postStyleProps: Map<any, {[prop: string]: boolean}>;\n  totalTime: number;\n  errors?: any[];\n}\n\nexport function createTransitionInstruction(\n    element: any, triggerName: string, fromState: string, toState: string,\n    isRemovalTransition: boolean, fromStyles: ɵStyleData, toStyles: ɵStyleData,\n    timelines: AnimationTimelineInstruction[], queriedElements: any[],\n    preStyleProps: Map<any, {[prop: string]: boolean}>,\n    postStyleProps: Map<any, {[prop: string]: boolean}>, totalTime: number,\n    errors?: any[]): AnimationTransitionInstruction {\n  return {\n    type: AnimationTransitionInstructionType.TransitionAnimation,\n    element,\n    triggerName,\n    isRemovalTransition,\n    fromState,\n    fromStyles,\n    toState,\n    toStyles,\n    timelines,\n    queriedElements,\n    preStyleProps,\n    postStyleProps,\n    totalTime,\n    errors\n  };\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {AnimationOptions, ɵStyleData} from '@angular/animations';\n\nimport {AnimationDriver} from '../render/animation_driver';\nimport {getOrSetAsInMap} from '../render/shared';\nimport {copyObj, interpolateParams, iteratorToArray, mergeAnimationOptions} from '../util';\n\nimport {StyleAst, TransitionAst} from './animation_ast';\nimport {buildAnimationTimelines} from './animation_timeline_builder';\nimport {TransitionMatcherFn} from './animation_transition_expr';\nimport {AnimationTransitionInstruction, createTransitionInstruction} from './animation_transition_instruction';\nimport {ElementInstructionMap} from './element_instruction_map';\n\nconst EMPTY_OBJECT = {};\n\nexport class AnimationTransitionFactory {\n  constructor(\n      private _triggerName: string, public ast: TransitionAst,\n      private _stateStyles: {[stateName: string]: AnimationStateStyles}) {}\n\n  match(currentState: any, nextState: any, element: any, params: {[key: string]: any}): boolean {\n    return oneOrMoreTransitionsMatch(this.ast.matchers, currentState, nextState, element, params);\n  }\n\n  buildStyles(stateName: string, params: {[key: string]: any}, errors: any[]) {\n    const backupStateStyler = this._stateStyles['*'];\n    const stateStyler = this._stateStyles[stateName];\n    const backupStyles = backupStateStyler ? backupStateStyler.buildStyles(params, errors) : {};\n    return stateStyler ? stateStyler.buildStyles(params, errors) : backupStyles;\n  }\n\n  build(\n      driver: AnimationDriver, element: any, currentState: any, nextState: any,\n      enterClassName: string, leaveClassName: string, currentOptions?: AnimationOptions,\n      nextOptions?: AnimationOptions, subInstructions?: ElementInstructionMap,\n      skipAstBuild?: boolean): AnimationTransitionInstruction {\n    const errors: any[] = [];\n\n    const transitionAnimationParams = this.ast.options && this.ast.options.params || EMPTY_OBJECT;\n    const currentAnimationParams = currentOptions && currentOptions.params || EMPTY_OBJECT;\n    const currentStateStyles = this.buildStyles(currentState, currentAnimationParams, errors);\n    const nextAnimationParams = nextOptions && nextOptions.params || EMPTY_OBJECT;\n    const nextStateStyles = this.buildStyles(nextState, nextAnimationParams, errors);\n\n    const queriedElements = new Set<any>();\n    const preStyleMap = new Map<any, {[prop: string]: boolean}>();\n    const postStyleMap = new Map<any, {[prop: string]: boolean}>();\n    const isRemoval = nextState === 'void';\n\n    const animationOptions = {params: {...transitionAnimationParams, ...nextAnimationParams}};\n\n    const timelines = skipAstBuild ?\n        [] :\n        buildAnimationTimelines(\n            driver, element, this.ast.animation, enterClassName, leaveClassName, currentStateStyles,\n            nextStateStyles, animationOptions, subInstructions, errors);\n\n    let totalTime = 0;\n    timelines.forEach(tl => {\n      totalTime = Math.max(tl.duration + tl.delay, totalTime);\n    });\n\n    if (errors.length) {\n      return createTransitionInstruction(\n          element, this._triggerName, currentState, nextState, isRemoval, currentStateStyles,\n          nextStateStyles, [], [], preStyleMap, postStyleMap, totalTime, errors);\n    }\n\n    timelines.forEach(tl => {\n      const elm = tl.element;\n      const preProps = getOrSetAsInMap(preStyleMap, elm, {});\n      tl.preStyleProps.forEach(prop => preProps[prop] = true);\n\n      const postProps = getOrSetAsInMap(postStyleMap, elm, {});\n      tl.postStyleProps.forEach(prop => postProps[prop] = true);\n\n      if (elm !== element) {\n        queriedElements.add(elm);\n      }\n    });\n\n    const queriedElementsList = iteratorToArray(queriedElements.values());\n    return createTransitionInstruction(\n        element, this._triggerName, currentState, nextState, isRemoval, currentStateStyles,\n        nextStateStyles, timelines, queriedElementsList, preStyleMap, postStyleMap, totalTime);\n  }\n}\n\nfunction oneOrMoreTransitionsMatch(\n    matchFns: TransitionMatcherFn[], currentState: any, nextState: any, element: any,\n    params: {[key: string]: any}): boolean {\n  return matchFns.some(fn => fn(currentState, nextState, element, params));\n}\n\nexport class AnimationStateStyles {\n  constructor(private styles: StyleAst, private defaultParams: {[key: string]: any}) {}\n\n  buildStyles(params: {[key: string]: any}, errors: string[]): ɵStyleData {\n    const finalStyles: ɵStyleData = {};\n    const combinedParams = copyObj(this.defaultParams);\n    Object.keys(params).forEach(key => {\n      const value = params[key];\n      if (value != null) {\n        combinedParams[key] = value;\n      }\n    });\n    this.styles.styles.forEach(value => {\n      if (typeof value !== 'string') {\n        const styleObj = value as any;\n        Object.keys(styleObj).forEach(prop => {\n          let val = styleObj[prop];\n          if (val.length > 1) {\n            val = interpolateParams(val, combinedParams, errors);\n          }\n          finalStyles[prop] = val;\n        });\n      }\n    });\n    return finalStyles;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {AnimationMetadataType, ɵStyleData} from '@angular/animations';\n\nimport {copyStyles, interpolateParams} from '../util';\n\nimport {SequenceAst, StyleAst, TransitionAst, TriggerAst} from './animation_ast';\nimport {AnimationStateStyles, AnimationTransitionFactory} from './animation_transition_factory';\n\n\n\n/**\n * @publicApi\n */\nexport function buildTrigger(name: string, ast: TriggerAst): AnimationTrigger {\n  return new AnimationTrigger(name, ast);\n}\n\n/**\n * @publicApi\n */\nexport class AnimationTrigger {\n  public transitionFactories: AnimationTransitionFactory[] = [];\n  public fallbackTransition: AnimationTransitionFactory;\n  public states: {[stateName: string]: AnimationStateStyles} = {};\n\n  constructor(public name: string, public ast: TriggerAst) {\n    ast.states.forEach(ast => {\n      const defaultParams = (ast.options && ast.options.params) || {};\n      this.states[ast.name] = new AnimationStateStyles(ast.style, defaultParams);\n    });\n\n    balanceProperties(this.states, 'true', '1');\n    balanceProperties(this.states, 'false', '0');\n\n    ast.transitions.forEach(ast => {\n      this.transitionFactories.push(new AnimationTransitionFactory(name, ast, this.states));\n    });\n\n    this.fallbackTransition = createFallbackTransition(name, this.states);\n  }\n\n  get containsQueries() {\n    return this.ast.queryCount > 0;\n  }\n\n  matchTransition(currentState: any, nextState: any, element: any, params: {[key: string]: any}):\n      AnimationTransitionFactory|null {\n    const entry =\n        this.transitionFactories.find(f => f.match(currentState, nextState, element, params));\n    return entry || null;\n  }\n\n  matchStyles(currentState: any, params: {[key: string]: any}, errors: any[]): ɵStyleData {\n    return this.fallbackTransition.buildStyles(currentState, params, errors);\n  }\n}\n\nfunction createFallbackTransition(\n    triggerName: string,\n    states: {[stateName: string]: AnimationStateStyles}): AnimationTransitionFactory {\n  const matchers = [(fromState: any, toState: any) => true];\n  const animation: SequenceAst = {type: AnimationMetadataType.Sequence, steps: [], options: null};\n  const transition: TransitionAst = {\n    type: AnimationMetadataType.Transition,\n    animation,\n    matchers,\n    options: null,\n    queryCount: 0,\n    depCount: 0\n  };\n  return new AnimationTransitionFactory(triggerName, transition, states);\n}\n\nfunction balanceProperties(obj: {[key: string]: any}, key1: string, key2: string) {\n  if (obj.hasOwnProperty(key1)) {\n    if (!obj.hasOwnProperty(key2)) {\n      obj[key2] = obj[key1];\n    }\n  } else if (obj.hasOwnProperty(key2)) {\n    obj[key1] = obj[key2];\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {AnimationMetadata, AnimationMetadataType, AnimationOptions, AnimationPlayer, AUTO_STYLE, ɵStyleData} from '@angular/animations';\n\nimport {Ast} from '../dsl/animation_ast';\nimport {buildAnimationAst} from '../dsl/animation_ast_builder';\nimport {buildAnimationTimelines} from '../dsl/animation_timeline_builder';\nimport {AnimationTimelineInstruction} from '../dsl/animation_timeline_instruction';\nimport {ElementInstructionMap} from '../dsl/element_instruction_map';\nimport {AnimationStyleNormalizer} from '../dsl/style_normalization/animation_style_normalizer';\nimport {ENTER_CLASSNAME, LEAVE_CLASSNAME} from '../util';\n\nimport {AnimationDriver} from './animation_driver';\nimport {getOrSetAsInMap, listenOnPlayer, makeAnimationEvent, normalizeKeyframes, optimizeGroupPlayer} from './shared';\n\nconst EMPTY_INSTRUCTION_MAP = new ElementInstructionMap();\n\nexport class TimelineAnimationEngine {\n  private _animations: {[id: string]: Ast<AnimationMetadataType>} = {};\n  private _playersById: {[id: string]: AnimationPlayer} = {};\n  public players: AnimationPlayer[] = [];\n\n  constructor(\n      public bodyNode: any, private _driver: AnimationDriver,\n      private _normalizer: AnimationStyleNormalizer) {}\n\n  register(id: string, metadata: AnimationMetadata|AnimationMetadata[]) {\n    const errors: any[] = [];\n    const ast = buildAnimationAst(this._driver, metadata, errors);\n    if (errors.length) {\n      throw new Error(\n          `Unable to build the animation due to the following errors: ${errors.join('\\n')}`);\n    } else {\n      this._animations[id] = ast;\n    }\n  }\n\n  private _buildPlayer(\n      i: AnimationTimelineInstruction, preStyles: ɵStyleData,\n      postStyles?: ɵStyleData): AnimationPlayer {\n    const element = i.element;\n    const keyframes = normalizeKeyframes(\n        this._driver, this._normalizer, element, i.keyframes, preStyles, postStyles);\n    return this._driver.animate(element, keyframes, i.duration, i.delay, i.easing, [], true);\n  }\n\n  create(id: string, element: any, options: AnimationOptions = {}): AnimationPlayer {\n    const errors: any[] = [];\n    const ast = this._animations[id];\n    let instructions: AnimationTimelineInstruction[];\n\n    const autoStylesMap = new Map<any, ɵStyleData>();\n\n    if (ast) {\n      instructions = buildAnimationTimelines(\n          this._driver, element, ast, ENTER_CLASSNAME, LEAVE_CLASSNAME, {}, {}, options,\n          EMPTY_INSTRUCTION_MAP, errors);\n      instructions.forEach(inst => {\n        const styles = getOrSetAsInMap(autoStylesMap, inst.element, {});\n        inst.postStyleProps.forEach(prop => styles[prop] = null);\n      });\n    } else {\n      errors.push('The requested animation doesn\\'t exist or has already been destroyed');\n      instructions = [];\n    }\n\n    if (errors.length) {\n      throw new Error(\n          `Unable to create the animation due to the following errors: ${errors.join('\\n')}`);\n    }\n\n    autoStylesMap.forEach((styles, element) => {\n      Object.keys(styles).forEach(prop => {\n        styles[prop] = this._driver.computeStyle(element, prop, AUTO_STYLE);\n      });\n    });\n\n    const players = instructions.map(i => {\n      const styles = autoStylesMap.get(i.element);\n      return this._buildPlayer(i, {}, styles);\n    });\n    const player = optimizeGroupPlayer(players);\n    this._playersById[id] = player;\n    player.onDestroy(() => this.destroy(id));\n\n    this.players.push(player);\n    return player;\n  }\n\n  destroy(id: string) {\n    const player = this._getPlayer(id);\n    player.destroy();\n    delete this._playersById[id];\n    const index = this.players.indexOf(player);\n    if (index >= 0) {\n      this.players.splice(index, 1);\n    }\n  }\n\n  private _getPlayer(id: string): AnimationPlayer {\n    const player = this._playersById[id];\n    if (!player) {\n      throw new Error(`Unable to find the timeline player referenced by ${id}`);\n    }\n    return player;\n  }\n\n  listen(id: string, element: string, eventName: string, callback: (event: any) => any):\n      () => void {\n    // triggerName, fromState, toState are all ignored for timeline animations\n    const baseEvent = makeAnimationEvent(element, '', '', '');\n    listenOnPlayer(this._getPlayer(id), eventName, baseEvent, callback);\n    return () => {};\n  }\n\n  command(id: string, element: any, command: string, args: any[]): void {\n    if (command == 'register') {\n      this.register(id, args[0] as AnimationMetadata | AnimationMetadata[]);\n      return;\n    }\n\n    if (command == 'create') {\n      const options = (args[0] || {}) as AnimationOptions;\n      this.create(id, element, options);\n      return;\n    }\n\n    const player = this._getPlayer(id);\n    switch (command) {\n      case 'play':\n        player.play();\n        break;\n      case 'pause':\n        player.pause();\n        break;\n      case 'reset':\n        player.reset();\n        break;\n      case 'restart':\n        player.restart();\n        break;\n      case 'finish':\n        player.finish();\n        break;\n      case 'init':\n        player.init();\n        break;\n      case 'setPosition':\n        player.setPosition(parseFloat(args[0] as string));\n        break;\n      case 'destroy':\n        this.destroy(id);\n        break;\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {AnimationOptions, AnimationPlayer, AUTO_STYLE, NoopAnimationPlayer, ɵAnimationGroupPlayer as AnimationGroupPlayer, ɵPRE_STYLE as PRE_STYLE, ɵStyleData} from '@angular/animations';\n\nimport {AnimationTimelineInstruction} from '../dsl/animation_timeline_instruction';\nimport {AnimationTransitionFactory} from '../dsl/animation_transition_factory';\nimport {AnimationTransitionInstruction} from '../dsl/animation_transition_instruction';\nimport {AnimationTrigger} from '../dsl/animation_trigger';\nimport {ElementInstructionMap} from '../dsl/element_instruction_map';\nimport {AnimationStyleNormalizer} from '../dsl/style_normalization/animation_style_normalizer';\nimport {copyObj, ENTER_CLASSNAME, eraseStyles, iteratorToArray, LEAVE_CLASSNAME, NG_ANIMATING_CLASSNAME, NG_ANIMATING_SELECTOR, NG_TRIGGER_CLASSNAME, NG_TRIGGER_SELECTOR, setStyles} from '../util';\n\nimport {AnimationDriver} from './animation_driver';\nimport {getOrSetAsInMap, listenOnPlayer, makeAnimationEvent, normalizeKeyframes, optimizeGroupPlayer} from './shared';\n\nconst QUEUED_CLASSNAME = 'ng-animate-queued';\nconst QUEUED_SELECTOR = '.ng-animate-queued';\nconst DISABLED_CLASSNAME = 'ng-animate-disabled';\nconst DISABLED_SELECTOR = '.ng-animate-disabled';\nconst STAR_CLASSNAME = 'ng-star-inserted';\nconst STAR_SELECTOR = '.ng-star-inserted';\n\nconst EMPTY_PLAYER_ARRAY: TransitionAnimationPlayer[] = [];\nconst NULL_REMOVAL_STATE: ElementAnimationState = {\n  namespaceId: '',\n  setForRemoval: false,\n  setForMove: false,\n  hasAnimation: false,\n  removedBeforeQueried: false\n};\nconst NULL_REMOVED_QUERIED_STATE: ElementAnimationState = {\n  namespaceId: '',\n  setForMove: false,\n  setForRemoval: false,\n  hasAnimation: false,\n  removedBeforeQueried: true\n};\n\ninterface TriggerListener {\n  name: string;\n  phase: string;\n  callback: (event: any) => any;\n}\n\nexport interface QueueInstruction {\n  element: any;\n  triggerName: string;\n  fromState: StateValue;\n  toState: StateValue;\n  transition: AnimationTransitionFactory;\n  player: TransitionAnimationPlayer;\n  isFallbackTransition: boolean;\n}\n\nexport const REMOVAL_FLAG = '__ng_removed';\n\nexport interface ElementAnimationState {\n  setForRemoval: boolean;\n  setForMove: boolean;\n  hasAnimation: boolean;\n  namespaceId: string;\n  removedBeforeQueried: boolean;\n}\n\nexport class StateValue {\n  public value: string;\n  public options: AnimationOptions;\n\n  get params(): {[key: string]: any} {\n    return this.options.params as {[key: string]: any};\n  }\n\n  constructor(input: any, public namespaceId: string = '') {\n    const isObj = input && input.hasOwnProperty('value');\n    const value = isObj ? input['value'] : input;\n    this.value = normalizeTriggerValue(value);\n    if (isObj) {\n      const options = copyObj(input as any);\n      delete options['value'];\n      this.options = options as AnimationOptions;\n    } else {\n      this.options = {};\n    }\n    if (!this.options.params) {\n      this.options.params = {};\n    }\n  }\n\n  absorbOptions(options: AnimationOptions) {\n    const newParams = options.params;\n    if (newParams) {\n      const oldParams = this.options.params!;\n      Object.keys(newParams).forEach(prop => {\n        if (oldParams[prop] == null) {\n          oldParams[prop] = newParams[prop];\n        }\n      });\n    }\n  }\n}\n\nexport const VOID_VALUE = 'void';\nexport const DEFAULT_STATE_VALUE = new StateValue(VOID_VALUE);\n\nexport class AnimationTransitionNamespace {\n  public players: TransitionAnimationPlayer[] = [];\n\n  private _triggers: {[triggerName: string]: AnimationTrigger} = {};\n  private _queue: QueueInstruction[] = [];\n\n  private _elementListeners = new Map<any, TriggerListener[]>();\n\n  private _hostClassName: string;\n\n  constructor(\n      public id: string, public hostElement: any, private _engine: TransitionAnimationEngine) {\n    this._hostClassName = 'ng-tns-' + id;\n    addClass(hostElement, this._hostClassName);\n  }\n\n  listen(element: any, name: string, phase: string, callback: (event: any) => boolean): () => any {\n    if (!this._triggers.hasOwnProperty(name)) {\n      throw new Error(`Unable to listen on the animation trigger event \"${\n          phase}\" because the animation trigger \"${name}\" doesn\\'t exist!`);\n    }\n\n    if (phase == null || phase.length == 0) {\n      throw new Error(`Unable to listen on the animation trigger \"${\n          name}\" because the provided event is undefined!`);\n    }\n\n    if (!isTriggerEventValid(phase)) {\n      throw new Error(`The provided animation trigger event \"${phase}\" for the animation trigger \"${\n          name}\" is not supported!`);\n    }\n\n    const listeners = getOrSetAsInMap(this._elementListeners, element, []);\n    const data = {name, phase, callback};\n    listeners.push(data);\n\n    const triggersWithStates = getOrSetAsInMap(this._engine.statesByElement, element, {});\n    if (!triggersWithStates.hasOwnProperty(name)) {\n      addClass(element, NG_TRIGGER_CLASSNAME);\n      addClass(element, NG_TRIGGER_CLASSNAME + '-' + name);\n      triggersWithStates[name] = DEFAULT_STATE_VALUE;\n    }\n\n    return () => {\n      // the event listener is removed AFTER the flush has occurred such\n      // that leave animations callbacks can fire (otherwise if the node\n      // is removed in between then the listeners would be deregistered)\n      this._engine.afterFlush(() => {\n        const index = listeners.indexOf(data);\n        if (index >= 0) {\n          listeners.splice(index, 1);\n        }\n\n        if (!this._triggers[name]) {\n          delete triggersWithStates[name];\n        }\n      });\n    };\n  }\n\n  register(name: string, ast: AnimationTrigger): boolean {\n    if (this._triggers[name]) {\n      // throw\n      return false;\n    } else {\n      this._triggers[name] = ast;\n      return true;\n    }\n  }\n\n  private _getTrigger(name: string) {\n    const trigger = this._triggers[name];\n    if (!trigger) {\n      throw new Error(`The provided animation trigger \"${name}\" has not been registered!`);\n    }\n    return trigger;\n  }\n\n  trigger(element: any, triggerName: string, value: any, defaultToFallback: boolean = true):\n      TransitionAnimationPlayer|undefined {\n    const trigger = this._getTrigger(triggerName);\n    const player = new TransitionAnimationPlayer(this.id, triggerName, element);\n\n    let triggersWithStates = this._engine.statesByElement.get(element);\n    if (!triggersWithStates) {\n      addClass(element, NG_TRIGGER_CLASSNAME);\n      addClass(element, NG_TRIGGER_CLASSNAME + '-' + triggerName);\n      this._engine.statesByElement.set(element, triggersWithStates = {});\n    }\n\n    let fromState = triggersWithStates[triggerName];\n    const toState = new StateValue(value, this.id);\n\n    const isObj = value && value.hasOwnProperty('value');\n    if (!isObj && fromState) {\n      toState.absorbOptions(fromState.options);\n    }\n\n    triggersWithStates[triggerName] = toState;\n\n    if (!fromState) {\n      fromState = DEFAULT_STATE_VALUE;\n    }\n\n    const isRemoval = toState.value === VOID_VALUE;\n\n    // normally this isn't reached by here, however, if an object expression\n    // is passed in then it may be a new object each time. Comparing the value\n    // is important since that will stay the same despite there being a new object.\n    // The removal arc here is special cased because the same element is triggered\n    // twice in the event that it contains animations on the outer/inner portions\n    // of the host container\n    if (!isRemoval && fromState.value === toState.value) {\n      // this means that despite the value not changing, some inner params\n      // have changed which means that the animation final styles need to be applied\n      if (!objEquals(fromState.params, toState.params)) {\n        const errors: any[] = [];\n        const fromStyles = trigger.matchStyles(fromState.value, fromState.params, errors);\n        const toStyles = trigger.matchStyles(toState.value, toState.params, errors);\n        if (errors.length) {\n          this._engine.reportError(errors);\n        } else {\n          this._engine.afterFlush(() => {\n            eraseStyles(element, fromStyles);\n            setStyles(element, toStyles);\n          });\n        }\n      }\n      return;\n    }\n\n    const playersOnElement: TransitionAnimationPlayer[] =\n        getOrSetAsInMap(this._engine.playersByElement, element, []);\n    playersOnElement.forEach(player => {\n      // only remove the player if it is queued on the EXACT same trigger/namespace\n      // we only also deal with queued players here because if the animation has\n      // started then we want to keep the player alive until the flush happens\n      // (which is where the previousPlayers are passed into the new palyer)\n      if (player.namespaceId == this.id && player.triggerName == triggerName && player.queued) {\n        player.destroy();\n      }\n    });\n\n    let transition =\n        trigger.matchTransition(fromState.value, toState.value, element, toState.params);\n    let isFallbackTransition = false;\n    if (!transition) {\n      if (!defaultToFallback) return;\n      transition = trigger.fallbackTransition;\n      isFallbackTransition = true;\n    }\n\n    this._engine.totalQueuedPlayers++;\n    this._queue.push(\n        {element, triggerName, transition, fromState, toState, player, isFallbackTransition});\n\n    if (!isFallbackTransition) {\n      addClass(element, QUEUED_CLASSNAME);\n      player.onStart(() => {\n        removeClass(element, QUEUED_CLASSNAME);\n      });\n    }\n\n    player.onDone(() => {\n      let index = this.players.indexOf(player);\n      if (index >= 0) {\n        this.players.splice(index, 1);\n      }\n\n      const players = this._engine.playersByElement.get(element);\n      if (players) {\n        let index = players.indexOf(player);\n        if (index >= 0) {\n          players.splice(index, 1);\n        }\n      }\n    });\n\n    this.players.push(player);\n    playersOnElement.push(player);\n\n    return player;\n  }\n\n  deregister(name: string) {\n    delete this._triggers[name];\n\n    this._engine.statesByElement.forEach((stateMap, element) => {\n      delete stateMap[name];\n    });\n\n    this._elementListeners.forEach((listeners, element) => {\n      this._elementListeners.set(element, listeners.filter(entry => {\n        return entry.name != name;\n      }));\n    });\n  }\n\n  clearElementCache(element: any) {\n    this._engine.statesByElement.delete(element);\n    this._elementListeners.delete(element);\n    const elementPlayers = this._engine.playersByElement.get(element);\n    if (elementPlayers) {\n      elementPlayers.forEach(player => player.destroy());\n      this._engine.playersByElement.delete(element);\n    }\n  }\n\n  private _signalRemovalForInnerTriggers(rootElement: any, context: any) {\n    const elements = this._engine.driver.query(rootElement, NG_TRIGGER_SELECTOR, true);\n\n    // emulate a leave animation for all inner nodes within this node.\n    // If there are no animations found for any of the nodes then clear the cache\n    // for the element.\n    elements.forEach(elm => {\n      // this means that an inner remove() operation has already kicked off\n      // the animation on this element...\n      if (elm[REMOVAL_FLAG]) return;\n\n      const namespaces = this._engine.fetchNamespacesByElement(elm);\n      if (namespaces.size) {\n        namespaces.forEach(ns => ns.triggerLeaveAnimation(elm, context, false, true));\n      } else {\n        this.clearElementCache(elm);\n      }\n    });\n\n    // If the child elements were removed along with the parent, their animations might not\n    // have completed. Clear all the elements from the cache so we don't end up with a memory leak.\n    this._engine.afterFlushAnimationsDone(\n        () => elements.forEach(elm => this.clearElementCache(elm)));\n  }\n\n  triggerLeaveAnimation(\n      element: any, context: any, destroyAfterComplete?: boolean,\n      defaultToFallback?: boolean): boolean {\n    const triggerStates = this._engine.statesByElement.get(element);\n    if (triggerStates) {\n      const players: TransitionAnimationPlayer[] = [];\n      Object.keys(triggerStates).forEach(triggerName => {\n        // this check is here in the event that an element is removed\n        // twice (both on the host level and the component level)\n        if (this._triggers[triggerName]) {\n          const player = this.trigger(element, triggerName, VOID_VALUE, defaultToFallback);\n          if (player) {\n            players.push(player);\n          }\n        }\n      });\n\n      if (players.length) {\n        this._engine.markElementAsRemoved(this.id, element, true, context);\n        if (destroyAfterComplete) {\n          optimizeGroupPlayer(players).onDone(() => this._engine.processLeaveNode(element));\n        }\n        return true;\n      }\n    }\n    return false;\n  }\n\n  prepareLeaveAnimationListeners(element: any) {\n    const listeners = this._elementListeners.get(element);\n    if (listeners) {\n      const visitedTriggers = new Set<string>();\n      listeners.forEach(listener => {\n        const triggerName = listener.name;\n        if (visitedTriggers.has(triggerName)) return;\n        visitedTriggers.add(triggerName);\n\n        const trigger = this._triggers[triggerName];\n        const transition = trigger.fallbackTransition;\n        const elementStates = this._engine.statesByElement.get(element)!;\n        const fromState = elementStates[triggerName] || DEFAULT_STATE_VALUE;\n        const toState = new StateValue(VOID_VALUE);\n        const player = new TransitionAnimationPlayer(this.id, triggerName, element);\n\n        this._engine.totalQueuedPlayers++;\n        this._queue.push({\n          element,\n          triggerName,\n          transition,\n          fromState,\n          toState,\n          player,\n          isFallbackTransition: true\n        });\n      });\n    }\n  }\n\n  removeNode(element: any, context: any): void {\n    const engine = this._engine;\n\n    if (element.childElementCount) {\n      this._signalRemovalForInnerTriggers(element, context);\n    }\n\n    // this means that a * => VOID animation was detected and kicked off\n    if (this.triggerLeaveAnimation(element, context, true)) return;\n\n    // find the player that is animating and make sure that the\n    // removal is delayed until that player has completed\n    let containsPotentialParentTransition = false;\n    if (engine.totalAnimations) {\n      const currentPlayers =\n          engine.players.length ? engine.playersByQueriedElement.get(element) : [];\n\n      // when this `if statement` does not continue forward it means that\n      // a previous animation query has selected the current element and\n      // is animating it. In this situation want to continue forwards and\n      // allow the element to be queued up for animation later.\n      if (currentPlayers && currentPlayers.length) {\n        containsPotentialParentTransition = true;\n      } else {\n        let parent = element;\n        while (parent = parent.parentNode) {\n          const triggers = engine.statesByElement.get(parent);\n          if (triggers) {\n            containsPotentialParentTransition = true;\n            break;\n          }\n        }\n      }\n    }\n\n    // at this stage we know that the element will either get removed\n    // during flush or will be picked up by a parent query. Either way\n    // we need to fire the listeners for this element when it DOES get\n    // removed (once the query parent animation is done or after flush)\n    this.prepareLeaveAnimationListeners(element);\n\n    // whether or not a parent has an animation we need to delay the deferral of the leave\n    // operation until we have more information (which we do after flush() has been called)\n    if (containsPotentialParentTransition) {\n      engine.markElementAsRemoved(this.id, element, false, context);\n    } else {\n      const removalFlag = element[REMOVAL_FLAG];\n      if (!removalFlag || removalFlag === NULL_REMOVAL_STATE) {\n        // we do this after the flush has occurred such\n        // that the callbacks can be fired\n        engine.afterFlush(() => this.clearElementCache(element));\n        engine.destroyInnerAnimations(element);\n        engine._onRemovalComplete(element, context);\n      }\n    }\n  }\n\n  insertNode(element: any, parent: any): void {\n    addClass(element, this._hostClassName);\n  }\n\n  drainQueuedTransitions(microtaskId: number): QueueInstruction[] {\n    const instructions: QueueInstruction[] = [];\n    this._queue.forEach(entry => {\n      const player = entry.player;\n      if (player.destroyed) return;\n\n      const element = entry.element;\n      const listeners = this._elementListeners.get(element);\n      if (listeners) {\n        listeners.forEach((listener: TriggerListener) => {\n          if (listener.name == entry.triggerName) {\n            const baseEvent = makeAnimationEvent(\n                element, entry.triggerName, entry.fromState.value, entry.toState.value);\n            (baseEvent as any)['_data'] = microtaskId;\n            listenOnPlayer(entry.player, listener.phase, baseEvent, listener.callback);\n          }\n        });\n      }\n\n      if (player.markedForDestroy) {\n        this._engine.afterFlush(() => {\n          // now we can destroy the element properly since the event listeners have\n          // been bound to the player\n          player.destroy();\n        });\n      } else {\n        instructions.push(entry);\n      }\n    });\n\n    this._queue = [];\n\n    return instructions.sort((a, b) => {\n      // if depCount == 0 them move to front\n      // otherwise if a contains b then move back\n      const d0 = a.transition.ast.depCount;\n      const d1 = b.transition.ast.depCount;\n      if (d0 == 0 || d1 == 0) {\n        return d0 - d1;\n      }\n      return this._engine.driver.containsElement(a.element, b.element) ? 1 : -1;\n    });\n  }\n\n  destroy(context: any) {\n    this.players.forEach(p => p.destroy());\n    this._signalRemovalForInnerTriggers(this.hostElement, context);\n  }\n\n  elementContainsData(element: any): boolean {\n    let containsData = false;\n    if (this._elementListeners.has(element)) containsData = true;\n    containsData =\n        (this._queue.find(entry => entry.element === element) ? true : false) || containsData;\n    return containsData;\n  }\n}\n\nexport interface QueuedTransition {\n  element: any;\n  instruction: AnimationTransitionInstruction;\n  player: TransitionAnimationPlayer;\n}\n\nexport class TransitionAnimationEngine {\n  public players: TransitionAnimationPlayer[] = [];\n  public newHostElements = new Map<any, AnimationTransitionNamespace>();\n  public playersByElement = new Map<any, TransitionAnimationPlayer[]>();\n  public playersByQueriedElement = new Map<any, TransitionAnimationPlayer[]>();\n  public statesByElement = new Map<any, {[triggerName: string]: StateValue}>();\n  public disabledNodes = new Set<any>();\n\n  public totalAnimations = 0;\n  public totalQueuedPlayers = 0;\n\n  private _namespaceLookup: {[id: string]: AnimationTransitionNamespace} = {};\n  private _namespaceList: AnimationTransitionNamespace[] = [];\n  private _flushFns: (() => any)[] = [];\n  private _whenQuietFns: (() => any)[] = [];\n\n  public namespacesByHostElement = new Map<any, AnimationTransitionNamespace>();\n  public collectedEnterElements: any[] = [];\n  public collectedLeaveElements: any[] = [];\n\n  // this method is designed to be overridden by the code that uses this engine\n  public onRemovalComplete = (element: any, context: any) => {};\n\n  /** @internal */\n  _onRemovalComplete(element: any, context: any) {\n    this.onRemovalComplete(element, context);\n  }\n\n  constructor(\n      public bodyNode: any, public driver: AnimationDriver,\n      private _normalizer: AnimationStyleNormalizer) {}\n\n  get queuedPlayers(): TransitionAnimationPlayer[] {\n    const players: TransitionAnimationPlayer[] = [];\n    this._namespaceList.forEach(ns => {\n      ns.players.forEach(player => {\n        if (player.queued) {\n          players.push(player);\n        }\n      });\n    });\n    return players;\n  }\n\n  createNamespace(namespaceId: string, hostElement: any) {\n    const ns = new AnimationTransitionNamespace(namespaceId, hostElement, this);\n    if (hostElement.parentNode) {\n      this._balanceNamespaceList(ns, hostElement);\n    } else {\n      // defer this later until flush during when the host element has\n      // been inserted so that we know exactly where to place it in\n      // the namespace list\n      this.newHostElements.set(hostElement, ns);\n\n      // given that this host element is apart of the animation code, it\n      // may or may not be inserted by a parent node that is an of an\n      // animation renderer type. If this happens then we can still have\n      // access to this item when we query for :enter nodes. If the parent\n      // is a renderer then the set data-structure will normalize the entry\n      this.collectEnterElement(hostElement);\n    }\n    return this._namespaceLookup[namespaceId] = ns;\n  }\n\n  private _balanceNamespaceList(ns: AnimationTransitionNamespace, hostElement: any) {\n    const limit = this._namespaceList.length - 1;\n    if (limit >= 0) {\n      let found = false;\n      for (let i = limit; i >= 0; i--) {\n        const nextNamespace = this._namespaceList[i];\n        if (this.driver.containsElement(nextNamespace.hostElement, hostElement)) {\n          this._namespaceList.splice(i + 1, 0, ns);\n          found = true;\n          break;\n        }\n      }\n      if (!found) {\n        this._namespaceList.splice(0, 0, ns);\n      }\n    } else {\n      this._namespaceList.push(ns);\n    }\n\n    this.namespacesByHostElement.set(hostElement, ns);\n    return ns;\n  }\n\n  register(namespaceId: string, hostElement: any) {\n    let ns = this._namespaceLookup[namespaceId];\n    if (!ns) {\n      ns = this.createNamespace(namespaceId, hostElement);\n    }\n    return ns;\n  }\n\n  registerTrigger(namespaceId: string, name: string, trigger: AnimationTrigger) {\n    let ns = this._namespaceLookup[namespaceId];\n    if (ns && ns.register(name, trigger)) {\n      this.totalAnimations++;\n    }\n  }\n\n  destroy(namespaceId: string, context: any) {\n    if (!namespaceId) return;\n\n    const ns = this._fetchNamespace(namespaceId);\n\n    this.afterFlush(() => {\n      this.namespacesByHostElement.delete(ns.hostElement);\n      delete this._namespaceLookup[namespaceId];\n      const index = this._namespaceList.indexOf(ns);\n      if (index >= 0) {\n        this._namespaceList.splice(index, 1);\n      }\n    });\n\n    this.afterFlushAnimationsDone(() => ns.destroy(context));\n  }\n\n  private _fetchNamespace(id: string) {\n    return this._namespaceLookup[id];\n  }\n\n  fetchNamespacesByElement(element: any): Set<AnimationTransitionNamespace> {\n    // normally there should only be one namespace per element, however\n    // if @triggers are placed on both the component element and then\n    // its host element (within the component code) then there will be\n    // two namespaces returned. We use a set here to simply the dedupe\n    // of namespaces incase there are multiple triggers both the elm and host\n    const namespaces = new Set<AnimationTransitionNamespace>();\n    const elementStates = this.statesByElement.get(element);\n    if (elementStates) {\n      const keys = Object.keys(elementStates);\n      for (let i = 0; i < keys.length; i++) {\n        const nsId = elementStates[keys[i]].namespaceId;\n        if (nsId) {\n          const ns = this._fetchNamespace(nsId);\n          if (ns) {\n            namespaces.add(ns);\n          }\n        }\n      }\n    }\n    return namespaces;\n  }\n\n  trigger(namespaceId: string, element: any, name: string, value: any): boolean {\n    if (isElementNode(element)) {\n      const ns = this._fetchNamespace(namespaceId);\n      if (ns) {\n        ns.trigger(element, name, value);\n        return true;\n      }\n    }\n    return false;\n  }\n\n  insertNode(namespaceId: string, element: any, parent: any, insertBefore: boolean): void {\n    if (!isElementNode(element)) return;\n\n    // special case for when an element is removed and reinserted (move operation)\n    // when this occurs we do not want to use the element for deletion later\n    const details = element[REMOVAL_FLAG] as ElementAnimationState;\n    if (details && details.setForRemoval) {\n      details.setForRemoval = false;\n      details.setForMove = true;\n      const index = this.collectedLeaveElements.indexOf(element);\n      if (index >= 0) {\n        this.collectedLeaveElements.splice(index, 1);\n      }\n    }\n\n    // in the event that the namespaceId is blank then the caller\n    // code does not contain any animation code in it, but it is\n    // just being called so that the node is marked as being inserted\n    if (namespaceId) {\n      const ns = this._fetchNamespace(namespaceId);\n      // This if-statement is a workaround for router issue #21947.\n      // The router sometimes hits a race condition where while a route\n      // is being instantiated a new navigation arrives, triggering leave\n      // animation of DOM that has not been fully initialized, until this\n      // is resolved, we need to handle the scenario when DOM is not in a\n      // consistent state during the animation.\n      if (ns) {\n        ns.insertNode(element, parent);\n      }\n    }\n\n    // only *directives and host elements are inserted before\n    if (insertBefore) {\n      this.collectEnterElement(element);\n    }\n  }\n\n  collectEnterElement(element: any) {\n    this.collectedEnterElements.push(element);\n  }\n\n  markElementAsDisabled(element: any, value: boolean) {\n    if (value) {\n      if (!this.disabledNodes.has(element)) {\n        this.disabledNodes.add(element);\n        addClass(element, DISABLED_CLASSNAME);\n      }\n    } else if (this.disabledNodes.has(element)) {\n      this.disabledNodes.delete(element);\n      removeClass(element, DISABLED_CLASSNAME);\n    }\n  }\n\n  removeNode(namespaceId: string, element: any, isHostElement: boolean, context: any): void {\n    if (isElementNode(element)) {\n      const ns = namespaceId ? this._fetchNamespace(namespaceId) : null;\n      if (ns) {\n        ns.removeNode(element, context);\n      } else {\n        this.markElementAsRemoved(namespaceId, element, false, context);\n      }\n\n      if (isHostElement) {\n        const hostNS = this.namespacesByHostElement.get(element);\n        if (hostNS && hostNS.id !== namespaceId) {\n          hostNS.removeNode(element, context);\n        }\n      }\n    } else {\n      this._onRemovalComplete(element, context);\n    }\n  }\n\n  markElementAsRemoved(namespaceId: string, element: any, hasAnimation?: boolean, context?: any) {\n    this.collectedLeaveElements.push(element);\n    element[REMOVAL_FLAG] =\n        {namespaceId, setForRemoval: context, hasAnimation, removedBeforeQueried: false};\n  }\n\n  listen(\n      namespaceId: string, element: any, name: string, phase: string,\n      callback: (event: any) => boolean): () => any {\n    if (isElementNode(element)) {\n      return this._fetchNamespace(namespaceId).listen(element, name, phase, callback);\n    }\n    return () => {};\n  }\n\n  private _buildInstruction(\n      entry: QueueInstruction, subTimelines: ElementInstructionMap, enterClassName: string,\n      leaveClassName: string, skipBuildAst?: boolean) {\n    return entry.transition.build(\n        this.driver, entry.element, entry.fromState.value, entry.toState.value, enterClassName,\n        leaveClassName, entry.fromState.options, entry.toState.options, subTimelines, skipBuildAst);\n  }\n\n  destroyInnerAnimations(containerElement: any) {\n    let elements = this.driver.query(containerElement, NG_TRIGGER_SELECTOR, true);\n    elements.forEach(element => this.destroyActiveAnimationsForElement(element));\n\n    if (this.playersByQueriedElement.size == 0) return;\n\n    elements = this.driver.query(containerElement, NG_ANIMATING_SELECTOR, true);\n    elements.forEach(element => this.finishActiveQueriedAnimationOnElement(element));\n  }\n\n  destroyActiveAnimationsForElement(element: any) {\n    const players = this.playersByElement.get(element);\n    if (players) {\n      players.forEach(player => {\n        // special case for when an element is set for destruction, but hasn't started.\n        // in this situation we want to delay the destruction until the flush occurs\n        // so that any event listeners attached to the player are triggered.\n        if (player.queued) {\n          player.markedForDestroy = true;\n        } else {\n          player.destroy();\n        }\n      });\n    }\n  }\n\n  finishActiveQueriedAnimationOnElement(element: any) {\n    const players = this.playersByQueriedElement.get(element);\n    if (players) {\n      players.forEach(player => player.finish());\n    }\n  }\n\n  whenRenderingDone(): Promise<any> {\n    return new Promise(resolve => {\n      if (this.players.length) {\n        return optimizeGroupPlayer(this.players).onDone(() => resolve());\n      } else {\n        resolve();\n      }\n    });\n  }\n\n  processLeaveNode(element: any) {\n    const details = element[REMOVAL_FLAG] as ElementAnimationState;\n    if (details && details.setForRemoval) {\n      // this will prevent it from removing it twice\n      element[REMOVAL_FLAG] = NULL_REMOVAL_STATE;\n      if (details.namespaceId) {\n        this.destroyInnerAnimations(element);\n        const ns = this._fetchNamespace(details.namespaceId);\n        if (ns) {\n          ns.clearElementCache(element);\n        }\n      }\n      this._onRemovalComplete(element, details.setForRemoval);\n    }\n\n    if (this.driver.matchesElement(element, DISABLED_SELECTOR)) {\n      this.markElementAsDisabled(element, false);\n    }\n\n    this.driver.query(element, DISABLED_SELECTOR, true).forEach(node => {\n      this.markElementAsDisabled(node, false);\n    });\n  }\n\n  flush(microtaskId: number = -1) {\n    let players: AnimationPlayer[] = [];\n    if (this.newHostElements.size) {\n      this.newHostElements.forEach((ns, element) => this._balanceNamespaceList(ns, element));\n      this.newHostElements.clear();\n    }\n\n    if (this.totalAnimations && this.collectedEnterElements.length) {\n      for (let i = 0; i < this.collectedEnterElements.length; i++) {\n        const elm = this.collectedEnterElements[i];\n        addClass(elm, STAR_CLASSNAME);\n      }\n    }\n\n    if (this._namespaceList.length &&\n        (this.totalQueuedPlayers || this.collectedLeaveElements.length)) {\n      const cleanupFns: Function[] = [];\n      try {\n        players = this._flushAnimations(cleanupFns, microtaskId);\n      } finally {\n        for (let i = 0; i < cleanupFns.length; i++) {\n          cleanupFns[i]();\n        }\n      }\n    } else {\n      for (let i = 0; i < this.collectedLeaveElements.length; i++) {\n        const element = this.collectedLeaveElements[i];\n        this.processLeaveNode(element);\n      }\n    }\n\n    this.totalQueuedPlayers = 0;\n    this.collectedEnterElements.length = 0;\n    this.collectedLeaveElements.length = 0;\n    this._flushFns.forEach(fn => fn());\n    this._flushFns = [];\n\n    if (this._whenQuietFns.length) {\n      // we move these over to a variable so that\n      // if any new callbacks are registered in another\n      // flush they do not populate the existing set\n      const quietFns = this._whenQuietFns;\n      this._whenQuietFns = [];\n\n      if (players.length) {\n        optimizeGroupPlayer(players).onDone(() => {\n          quietFns.forEach(fn => fn());\n        });\n      } else {\n        quietFns.forEach(fn => fn());\n      }\n    }\n  }\n\n  reportError(errors: string[]) {\n    throw new Error(\n        `Unable to process animations due to the following failed trigger transitions\\n ${\n            errors.join('\\n')}`);\n  }\n\n  private _flushAnimations(cleanupFns: Function[], microtaskId: number):\n      TransitionAnimationPlayer[] {\n    const subTimelines = new ElementInstructionMap();\n    const skippedPlayers: TransitionAnimationPlayer[] = [];\n    const skippedPlayersMap = new Map<any, AnimationPlayer[]>();\n    const queuedInstructions: QueuedTransition[] = [];\n    const queriedElements = new Map<any, TransitionAnimationPlayer[]>();\n    const allPreStyleElements = new Map<any, Set<string>>();\n    const allPostStyleElements = new Map<any, Set<string>>();\n\n    const disabledElementsSet = new Set<any>();\n    this.disabledNodes.forEach(node => {\n      disabledElementsSet.add(node);\n      const nodesThatAreDisabled = this.driver.query(node, QUEUED_SELECTOR, true);\n      for (let i = 0; i < nodesThatAreDisabled.length; i++) {\n        disabledElementsSet.add(nodesThatAreDisabled[i]);\n      }\n    });\n\n    const bodyNode = this.bodyNode;\n    const allTriggerElements = Array.from(this.statesByElement.keys());\n    const enterNodeMap = buildRootMap(allTriggerElements, this.collectedEnterElements);\n\n    // this must occur before the instructions are built below such that\n    // the :enter queries match the elements (since the timeline queries\n    // are fired during instruction building).\n    const enterNodeMapIds = new Map<any, string>();\n    let i = 0;\n    enterNodeMap.forEach((nodes, root) => {\n      const className = ENTER_CLASSNAME + i++;\n      enterNodeMapIds.set(root, className);\n      nodes.forEach(node => addClass(node, className));\n    });\n\n    const allLeaveNodes: any[] = [];\n    const mergedLeaveNodes = new Set<any>();\n    const leaveNodesWithoutAnimations = new Set<any>();\n    for (let i = 0; i < this.collectedLeaveElements.length; i++) {\n      const element = this.collectedLeaveElements[i];\n      const details = element[REMOVAL_FLAG] as ElementAnimationState;\n      if (details && details.setForRemoval) {\n        allLeaveNodes.push(element);\n        mergedLeaveNodes.add(element);\n        if (details.hasAnimation) {\n          this.driver.query(element, STAR_SELECTOR, true).forEach(elm => mergedLeaveNodes.add(elm));\n        } else {\n          leaveNodesWithoutAnimations.add(element);\n        }\n      }\n    }\n\n    const leaveNodeMapIds = new Map<any, string>();\n    const leaveNodeMap = buildRootMap(allTriggerElements, Array.from(mergedLeaveNodes));\n    leaveNodeMap.forEach((nodes, root) => {\n      const className = LEAVE_CLASSNAME + i++;\n      leaveNodeMapIds.set(root, className);\n      nodes.forEach(node => addClass(node, className));\n    });\n\n    cleanupFns.push(() => {\n      enterNodeMap.forEach((nodes, root) => {\n        const className = enterNodeMapIds.get(root)!;\n        nodes.forEach(node => removeClass(node, className));\n      });\n\n      leaveNodeMap.forEach((nodes, root) => {\n        const className = leaveNodeMapIds.get(root)!;\n        nodes.forEach(node => removeClass(node, className));\n      });\n\n      allLeaveNodes.forEach(element => {\n        this.processLeaveNode(element);\n      });\n    });\n\n    const allPlayers: TransitionAnimationPlayer[] = [];\n    const erroneousTransitions: AnimationTransitionInstruction[] = [];\n    for (let i = this._namespaceList.length - 1; i >= 0; i--) {\n      const ns = this._namespaceList[i];\n      ns.drainQueuedTransitions(microtaskId).forEach(entry => {\n        const player = entry.player;\n        const element = entry.element;\n        allPlayers.push(player);\n\n        if (this.collectedEnterElements.length) {\n          const details = element[REMOVAL_FLAG] as ElementAnimationState;\n          // move animations are currently not supported...\n          if (details && details.setForMove) {\n            player.destroy();\n            return;\n          }\n        }\n\n        const nodeIsOrphaned = !bodyNode || !this.driver.containsElement(bodyNode, element);\n        const leaveClassName = leaveNodeMapIds.get(element)!;\n        const enterClassName = enterNodeMapIds.get(element)!;\n        const instruction = this._buildInstruction(\n            entry, subTimelines, enterClassName, leaveClassName, nodeIsOrphaned)!;\n        if (instruction.errors && instruction.errors.length) {\n          erroneousTransitions.push(instruction);\n          return;\n        }\n\n        // even though the element may not be apart of the DOM, it may\n        // still be added at a later point (due to the mechanics of content\n        // projection and/or dynamic component insertion) therefore it's\n        // important we still style the element.\n        if (nodeIsOrphaned) {\n          player.onStart(() => eraseStyles(element, instruction.fromStyles));\n          player.onDestroy(() => setStyles(element, instruction.toStyles));\n          skippedPlayers.push(player);\n          return;\n        }\n\n        // if a unmatched transition is queued to go then it SHOULD NOT render\n        // an animation and cancel the previously running animations.\n        if (entry.isFallbackTransition) {\n          player.onStart(() => eraseStyles(element, instruction.fromStyles));\n          player.onDestroy(() => setStyles(element, instruction.toStyles));\n          skippedPlayers.push(player);\n          return;\n        }\n\n        // this means that if a parent animation uses this animation as a sub trigger\n        // then it will instruct the timeline builder to not add a player delay, but\n        // instead stretch the first keyframe gap up until the animation starts. The\n        // reason this is important is to prevent extra initialization styles from being\n        // required by the user in the animation.\n        instruction.timelines.forEach(tl => tl.stretchStartingKeyframe = true);\n\n        subTimelines.append(element, instruction.timelines);\n\n        const tuple = {instruction, player, element};\n\n        queuedInstructions.push(tuple);\n\n        instruction.queriedElements.forEach(\n            element => getOrSetAsInMap(queriedElements, element, []).push(player));\n\n        instruction.preStyleProps.forEach((stringMap, element) => {\n          const props = Object.keys(stringMap);\n          if (props.length) {\n            let setVal: Set<string> = allPreStyleElements.get(element)!;\n            if (!setVal) {\n              allPreStyleElements.set(element, setVal = new Set<string>());\n            }\n            props.forEach(prop => setVal.add(prop));\n          }\n        });\n\n        instruction.postStyleProps.forEach((stringMap, element) => {\n          const props = Object.keys(stringMap);\n          let setVal: Set<string> = allPostStyleElements.get(element)!;\n          if (!setVal) {\n            allPostStyleElements.set(element, setVal = new Set<string>());\n          }\n          props.forEach(prop => setVal.add(prop));\n        });\n      });\n    }\n\n    if (erroneousTransitions.length) {\n      const errors: string[] = [];\n      erroneousTransitions.forEach(instruction => {\n        errors.push(`@${instruction.triggerName} has failed due to:\\n`);\n        instruction.errors!.forEach(error => errors.push(`- ${error}\\n`));\n      });\n\n      allPlayers.forEach(player => player.destroy());\n      this.reportError(errors);\n    }\n\n    const allPreviousPlayersMap = new Map<any, TransitionAnimationPlayer[]>();\n    // this map works to tell which element in the DOM tree is contained by\n    // which animation. Further down below this map will get populated once\n    // the players are built and in doing so it can efficiently figure out\n    // if a sub player is skipped due to a parent player having priority.\n    const animationElementMap = new Map<any, any>();\n    queuedInstructions.forEach(entry => {\n      const element = entry.element;\n      if (subTimelines.has(element)) {\n        animationElementMap.set(element, element);\n        this._beforeAnimationBuild(\n            entry.player.namespaceId, entry.instruction, allPreviousPlayersMap);\n      }\n    });\n\n    skippedPlayers.forEach(player => {\n      const element = player.element;\n      const previousPlayers =\n          this._getPreviousPlayers(element, false, player.namespaceId, player.triggerName, null);\n      previousPlayers.forEach(prevPlayer => {\n        getOrSetAsInMap(allPreviousPlayersMap, element, []).push(prevPlayer);\n        prevPlayer.destroy();\n      });\n    });\n\n    // this is a special case for nodes that will be removed (either by)\n    // having their own leave animations or by being queried in a container\n    // that will be removed once a parent animation is complete. The idea\n    // here is that * styles must be identical to ! styles because of\n    // backwards compatibility (* is also filled in by default in many places).\n    // Otherwise * styles will return an empty value or auto since the element\n    // that is being getComputedStyle'd will not be visible (since * = destination)\n    const replaceNodes = allLeaveNodes.filter(node => {\n      return replacePostStylesAsPre(node, allPreStyleElements, allPostStyleElements);\n    });\n\n    // POST STAGE: fill the * styles\n    const postStylesMap = new Map<any, ɵStyleData>();\n    const allLeaveQueriedNodes = cloakAndComputeStyles(\n        postStylesMap, this.driver, leaveNodesWithoutAnimations, allPostStyleElements, AUTO_STYLE);\n\n    allLeaveQueriedNodes.forEach(node => {\n      if (replacePostStylesAsPre(node, allPreStyleElements, allPostStyleElements)) {\n        replaceNodes.push(node);\n      }\n    });\n\n    // PRE STAGE: fill the ! styles\n    const preStylesMap = new Map<any, ɵStyleData>();\n    enterNodeMap.forEach((nodes, root) => {\n      cloakAndComputeStyles(\n          preStylesMap, this.driver, new Set(nodes), allPreStyleElements, PRE_STYLE);\n    });\n\n    replaceNodes.forEach(node => {\n      const post = postStylesMap.get(node);\n      const pre = preStylesMap.get(node);\n      postStylesMap.set(node, {...post, ...pre} as any);\n    });\n\n    const rootPlayers: TransitionAnimationPlayer[] = [];\n    const subPlayers: TransitionAnimationPlayer[] = [];\n    const NO_PARENT_ANIMATION_ELEMENT_DETECTED = {};\n    queuedInstructions.forEach(entry => {\n      const {element, player, instruction} = entry;\n      // this means that it was never consumed by a parent animation which\n      // means that it is independent and therefore should be set for animation\n      if (subTimelines.has(element)) {\n        if (disabledElementsSet.has(element)) {\n          player.onDestroy(() => setStyles(element, instruction.toStyles));\n          player.disabled = true;\n          player.overrideTotalTime(instruction.totalTime);\n          skippedPlayers.push(player);\n          return;\n        }\n\n        // this will flow up the DOM and query the map to figure out\n        // if a parent animation has priority over it. In the situation\n        // that a parent is detected then it will cancel the loop. If\n        // nothing is detected, or it takes a few hops to find a parent,\n        // then it will fill in the missing nodes and signal them as having\n        // a detected parent (or a NO_PARENT value via a special constant).\n        let parentWithAnimation: any = NO_PARENT_ANIMATION_ELEMENT_DETECTED;\n        if (animationElementMap.size > 1) {\n          let elm = element;\n          const parentsToAdd: any[] = [];\n          while (elm = elm.parentNode) {\n            const detectedParent = animationElementMap.get(elm);\n            if (detectedParent) {\n              parentWithAnimation = detectedParent;\n              break;\n            }\n            parentsToAdd.push(elm);\n          }\n          parentsToAdd.forEach(parent => animationElementMap.set(parent, parentWithAnimation));\n        }\n\n        const innerPlayer = this._buildAnimation(\n            player.namespaceId, instruction, allPreviousPlayersMap, skippedPlayersMap, preStylesMap,\n            postStylesMap);\n\n        player.setRealPlayer(innerPlayer);\n\n        if (parentWithAnimation === NO_PARENT_ANIMATION_ELEMENT_DETECTED) {\n          rootPlayers.push(player);\n        } else {\n          const parentPlayers = this.playersByElement.get(parentWithAnimation);\n          if (parentPlayers && parentPlayers.length) {\n            player.parentPlayer = optimizeGroupPlayer(parentPlayers);\n          }\n          skippedPlayers.push(player);\n        }\n      } else {\n        eraseStyles(element, instruction.fromStyles);\n        player.onDestroy(() => setStyles(element, instruction.toStyles));\n        // there still might be a ancestor player animating this\n        // element therefore we will still add it as a sub player\n        // even if its animation may be disabled\n        subPlayers.push(player);\n        if (disabledElementsSet.has(element)) {\n          skippedPlayers.push(player);\n        }\n      }\n    });\n\n    // find all of the sub players' corresponding inner animation player\n    subPlayers.forEach(player => {\n      // even if any players are not found for a sub animation then it\n      // will still complete itself after the next tick since it's Noop\n      const playersForElement = skippedPlayersMap.get(player.element);\n      if (playersForElement && playersForElement.length) {\n        const innerPlayer = optimizeGroupPlayer(playersForElement);\n        player.setRealPlayer(innerPlayer);\n      }\n    });\n\n    // the reason why we don't actually play the animation is\n    // because all that a skipped player is designed to do is to\n    // fire the start/done transition callback events\n    skippedPlayers.forEach(player => {\n      if (player.parentPlayer) {\n        player.syncPlayerEvents(player.parentPlayer);\n      } else {\n        player.destroy();\n      }\n    });\n\n    // run through all of the queued removals and see if they\n    // were picked up by a query. If not then perform the removal\n    // operation right away unless a parent animation is ongoing.\n    for (let i = 0; i < allLeaveNodes.length; i++) {\n      const element = allLeaveNodes[i];\n      const details = element[REMOVAL_FLAG] as ElementAnimationState;\n      removeClass(element, LEAVE_CLASSNAME);\n\n      // this means the element has a removal animation that is being\n      // taken care of and therefore the inner elements will hang around\n      // until that animation is over (or the parent queried animation)\n      if (details && details.hasAnimation) continue;\n\n      let players: TransitionAnimationPlayer[] = [];\n\n      // if this element is queried or if it contains queried children\n      // then we want for the element not to be removed from the page\n      // until the queried animations have finished\n      if (queriedElements.size) {\n        let queriedPlayerResults = queriedElements.get(element);\n        if (queriedPlayerResults && queriedPlayerResults.length) {\n          players.push(...queriedPlayerResults);\n        }\n\n        let queriedInnerElements = this.driver.query(element, NG_ANIMATING_SELECTOR, true);\n        for (let j = 0; j < queriedInnerElements.length; j++) {\n          let queriedPlayers = queriedElements.get(queriedInnerElements[j]);\n          if (queriedPlayers && queriedPlayers.length) {\n            players.push(...queriedPlayers);\n          }\n        }\n      }\n\n      const activePlayers = players.filter(p => !p.destroyed);\n      if (activePlayers.length) {\n        removeNodesAfterAnimationDone(this, element, activePlayers);\n      } else {\n        this.processLeaveNode(element);\n      }\n    }\n\n    // this is required so the cleanup method doesn't remove them\n    allLeaveNodes.length = 0;\n\n    rootPlayers.forEach(player => {\n      this.players.push(player);\n      player.onDone(() => {\n        player.destroy();\n\n        const index = this.players.indexOf(player);\n        this.players.splice(index, 1);\n      });\n      player.play();\n    });\n\n    return rootPlayers;\n  }\n\n  elementContainsData(namespaceId: string, element: any) {\n    let containsData = false;\n    const details = element[REMOVAL_FLAG] as ElementAnimationState;\n    if (details && details.setForRemoval) containsData = true;\n    if (this.playersByElement.has(element)) containsData = true;\n    if (this.playersByQueriedElement.has(element)) containsData = true;\n    if (this.statesByElement.has(element)) containsData = true;\n    return this._fetchNamespace(namespaceId).elementContainsData(element) || containsData;\n  }\n\n  afterFlush(callback: () => any) {\n    this._flushFns.push(callback);\n  }\n\n  afterFlushAnimationsDone(callback: () => any) {\n    this._whenQuietFns.push(callback);\n  }\n\n  private _getPreviousPlayers(\n      element: string, isQueriedElement: boolean, namespaceId?: string, triggerName?: string,\n      toStateValue?: any): TransitionAnimationPlayer[] {\n    let players: TransitionAnimationPlayer[] = [];\n    if (isQueriedElement) {\n      const queriedElementPlayers = this.playersByQueriedElement.get(element);\n      if (queriedElementPlayers) {\n        players = queriedElementPlayers;\n      }\n    } else {\n      const elementPlayers = this.playersByElement.get(element);\n      if (elementPlayers) {\n        const isRemovalAnimation = !toStateValue || toStateValue == VOID_VALUE;\n        elementPlayers.forEach(player => {\n          if (player.queued) return;\n          if (!isRemovalAnimation && player.triggerName != triggerName) return;\n          players.push(player);\n        });\n      }\n    }\n    if (namespaceId || triggerName) {\n      players = players.filter(player => {\n        if (namespaceId && namespaceId != player.namespaceId) return false;\n        if (triggerName && triggerName != player.triggerName) return false;\n        return true;\n      });\n    }\n    return players;\n  }\n\n  private _beforeAnimationBuild(\n      namespaceId: string, instruction: AnimationTransitionInstruction,\n      allPreviousPlayersMap: Map<any, TransitionAnimationPlayer[]>) {\n    const triggerName = instruction.triggerName;\n    const rootElement = instruction.element;\n\n    // when a removal animation occurs, ALL previous players are collected\n    // and destroyed (even if they are outside of the current namespace)\n    const targetNameSpaceId: string|undefined =\n        instruction.isRemovalTransition ? undefined : namespaceId;\n    const targetTriggerName: string|undefined =\n        instruction.isRemovalTransition ? undefined : triggerName;\n\n    for (const timelineInstruction of instruction.timelines) {\n      const element = timelineInstruction.element;\n      const isQueriedElement = element !== rootElement;\n      const players = getOrSetAsInMap(allPreviousPlayersMap, element, []);\n      const previousPlayers = this._getPreviousPlayers(\n          element, isQueriedElement, targetNameSpaceId, targetTriggerName, instruction.toState);\n      previousPlayers.forEach(player => {\n        const realPlayer = (player as TransitionAnimationPlayer).getRealPlayer() as any;\n        if (realPlayer.beforeDestroy) {\n          realPlayer.beforeDestroy();\n        }\n        player.destroy();\n        players.push(player);\n      });\n    }\n\n    // this needs to be done so that the PRE/POST styles can be\n    // computed properly without interfering with the previous animation\n    eraseStyles(rootElement, instruction.fromStyles);\n  }\n\n  private _buildAnimation(\n      namespaceId: string, instruction: AnimationTransitionInstruction,\n      allPreviousPlayersMap: Map<any, TransitionAnimationPlayer[]>,\n      skippedPlayersMap: Map<any, AnimationPlayer[]>, preStylesMap: Map<any, ɵStyleData>,\n      postStylesMap: Map<any, ɵStyleData>): AnimationPlayer {\n    const triggerName = instruction.triggerName;\n    const rootElement = instruction.element;\n\n    // we first run this so that the previous animation player\n    // data can be passed into the successive animation players\n    const allQueriedPlayers: TransitionAnimationPlayer[] = [];\n    const allConsumedElements = new Set<any>();\n    const allSubElements = new Set<any>();\n    const allNewPlayers = instruction.timelines.map(timelineInstruction => {\n      const element = timelineInstruction.element;\n      allConsumedElements.add(element);\n\n      // FIXME (matsko): make sure to-be-removed animations are removed properly\n      const details = element[REMOVAL_FLAG];\n      if (details && details.removedBeforeQueried)\n        return new NoopAnimationPlayer(timelineInstruction.duration, timelineInstruction.delay);\n\n      const isQueriedElement = element !== rootElement;\n      const previousPlayers =\n          flattenGroupPlayers((allPreviousPlayersMap.get(element) || EMPTY_PLAYER_ARRAY)\n                                  .map(p => p.getRealPlayer()))\n              .filter(p => {\n                // the `element` is not apart of the AnimationPlayer definition, but\n                // Mock/WebAnimations\n                // use the element within their implementation. This will be added in Angular5 to\n                // AnimationPlayer\n                const pp = p as any;\n                return pp.element ? pp.element === element : false;\n              });\n\n      const preStyles = preStylesMap.get(element);\n      const postStyles = postStylesMap.get(element);\n      const keyframes = normalizeKeyframes(\n          this.driver, this._normalizer, element, timelineInstruction.keyframes, preStyles,\n          postStyles);\n      const player = this._buildPlayer(timelineInstruction, keyframes, previousPlayers);\n\n      // this means that this particular player belongs to a sub trigger. It is\n      // important that we match this player up with the corresponding (@trigger.listener)\n      if (timelineInstruction.subTimeline && skippedPlayersMap) {\n        allSubElements.add(element);\n      }\n\n      if (isQueriedElement) {\n        const wrappedPlayer = new TransitionAnimationPlayer(namespaceId, triggerName, element);\n        wrappedPlayer.setRealPlayer(player);\n        allQueriedPlayers.push(wrappedPlayer);\n      }\n\n      return player;\n    });\n\n    allQueriedPlayers.forEach(player => {\n      getOrSetAsInMap(this.playersByQueriedElement, player.element, []).push(player);\n      player.onDone(() => deleteOrUnsetInMap(this.playersByQueriedElement, player.element, player));\n    });\n\n    allConsumedElements.forEach(element => addClass(element, NG_ANIMATING_CLASSNAME));\n    const player = optimizeGroupPlayer(allNewPlayers);\n    player.onDestroy(() => {\n      allConsumedElements.forEach(element => removeClass(element, NG_ANIMATING_CLASSNAME));\n      setStyles(rootElement, instruction.toStyles);\n    });\n\n    // this basically makes all of the callbacks for sub element animations\n    // be dependent on the upper players for when they finish\n    allSubElements.forEach(element => {\n      getOrSetAsInMap(skippedPlayersMap, element, []).push(player);\n    });\n\n    return player;\n  }\n\n  private _buildPlayer(\n      instruction: AnimationTimelineInstruction, keyframes: ɵStyleData[],\n      previousPlayers: AnimationPlayer[]): AnimationPlayer {\n    if (keyframes.length > 0) {\n      return this.driver.animate(\n          instruction.element, keyframes, instruction.duration, instruction.delay,\n          instruction.easing, previousPlayers);\n    }\n\n    // special case for when an empty transition|definition is provided\n    // ... there is no point in rendering an empty animation\n    return new NoopAnimationPlayer(instruction.duration, instruction.delay);\n  }\n}\n\nexport class TransitionAnimationPlayer implements AnimationPlayer {\n  private _player: AnimationPlayer = new NoopAnimationPlayer();\n  private _containsRealPlayer = false;\n\n  private _queuedCallbacks: {[name: string]: (() => any)[]} = {};\n  public readonly destroyed = false;\n  // TODO(issue/24571): remove '!'.\n  public parentPlayer!: AnimationPlayer;\n\n  public markedForDestroy: boolean = false;\n  public disabled = false;\n\n  readonly queued: boolean = true;\n  public readonly totalTime: number = 0;\n\n  constructor(public namespaceId: string, public triggerName: string, public element: any) {}\n\n  setRealPlayer(player: AnimationPlayer) {\n    if (this._containsRealPlayer) return;\n\n    this._player = player;\n    Object.keys(this._queuedCallbacks).forEach(phase => {\n      this._queuedCallbacks[phase].forEach(\n          callback => listenOnPlayer(player, phase, undefined, callback));\n    });\n    this._queuedCallbacks = {};\n    this._containsRealPlayer = true;\n    this.overrideTotalTime(player.totalTime);\n    (this as {queued: boolean}).queued = false;\n  }\n\n  getRealPlayer() {\n    return this._player;\n  }\n\n  overrideTotalTime(totalTime: number) {\n    (this as any).totalTime = totalTime;\n  }\n\n  syncPlayerEvents(player: AnimationPlayer) {\n    const p = this._player as any;\n    if (p.triggerCallback) {\n      player.onStart(() => p.triggerCallback!('start'));\n    }\n    player.onDone(() => this.finish());\n    player.onDestroy(() => this.destroy());\n  }\n\n  private _queueEvent(name: string, callback: (event: any) => any): void {\n    getOrSetAsInMap(this._queuedCallbacks, name, []).push(callback);\n  }\n\n  onDone(fn: () => void): void {\n    if (this.queued) {\n      this._queueEvent('done', fn);\n    }\n    this._player.onDone(fn);\n  }\n\n  onStart(fn: () => void): void {\n    if (this.queued) {\n      this._queueEvent('start', fn);\n    }\n    this._player.onStart(fn);\n  }\n\n  onDestroy(fn: () => void): void {\n    if (this.queued) {\n      this._queueEvent('destroy', fn);\n    }\n    this._player.onDestroy(fn);\n  }\n\n  init(): void {\n    this._player.init();\n  }\n\n  hasStarted(): boolean {\n    return this.queued ? false : this._player.hasStarted();\n  }\n\n  play(): void {\n    !this.queued && this._player.play();\n  }\n\n  pause(): void {\n    !this.queued && this._player.pause();\n  }\n\n  restart(): void {\n    !this.queued && this._player.restart();\n  }\n\n  finish(): void {\n    this._player.finish();\n  }\n\n  destroy(): void {\n    (this as {destroyed: boolean}).destroyed = true;\n    this._player.destroy();\n  }\n\n  reset(): void {\n    !this.queued && this._player.reset();\n  }\n\n  setPosition(p: any): void {\n    if (!this.queued) {\n      this._player.setPosition(p);\n    }\n  }\n\n  getPosition(): number {\n    return this.queued ? 0 : this._player.getPosition();\n  }\n\n  /** @internal */\n  triggerCallback(phaseName: string): void {\n    const p = this._player as any;\n    if (p.triggerCallback) {\n      p.triggerCallback(phaseName);\n    }\n  }\n}\n\nfunction deleteOrUnsetInMap(map: Map<any, any[]>|{[key: string]: any}, key: any, value: any) {\n  let currentValues: any[]|null|undefined;\n  if (map instanceof Map) {\n    currentValues = map.get(key);\n    if (currentValues) {\n      if (currentValues.length) {\n        const index = currentValues.indexOf(value);\n        currentValues.splice(index, 1);\n      }\n      if (currentValues.length == 0) {\n        map.delete(key);\n      }\n    }\n  } else {\n    currentValues = map[key];\n    if (currentValues) {\n      if (currentValues.length) {\n        const index = currentValues.indexOf(value);\n        currentValues.splice(index, 1);\n      }\n      if (currentValues.length == 0) {\n        delete map[key];\n      }\n    }\n  }\n  return currentValues;\n}\n\nfunction normalizeTriggerValue(value: any): any {\n  // we use `!= null` here because it's the most simple\n  // way to test against a \"falsy\" value without mixing\n  // in empty strings or a zero value. DO NOT OPTIMIZE.\n  return value != null ? value : null;\n}\n\nfunction isElementNode(node: any) {\n  return node && node['nodeType'] === 1;\n}\n\nfunction isTriggerEventValid(eventName: string): boolean {\n  return eventName == 'start' || eventName == 'done';\n}\n\nfunction cloakElement(element: any, value?: string) {\n  const oldValue = element.style.display;\n  element.style.display = value != null ? value : 'none';\n  return oldValue;\n}\n\nfunction cloakAndComputeStyles(\n    valuesMap: Map<any, ɵStyleData>, driver: AnimationDriver, elements: Set<any>,\n    elementPropsMap: Map<any, Set<string>>, defaultStyle: string): any[] {\n  const cloakVals: string[] = [];\n  elements.forEach(element => cloakVals.push(cloakElement(element)));\n\n  const failedElements: any[] = [];\n\n  elementPropsMap.forEach((props: Set<string>, element: any) => {\n    const styles: ɵStyleData = {};\n    props.forEach(prop => {\n      const value = styles[prop] = driver.computeStyle(element, prop, defaultStyle);\n\n      // there is no easy way to detect this because a sub element could be removed\n      // by a parent animation element being detached.\n      if (!value || value.length == 0) {\n        element[REMOVAL_FLAG] = NULL_REMOVED_QUERIED_STATE;\n        failedElements.push(element);\n      }\n    });\n    valuesMap.set(element, styles);\n  });\n\n  // we use a index variable here since Set.forEach(a, i) does not return\n  // an index value for the closure (but instead just the value)\n  let i = 0;\n  elements.forEach(element => cloakElement(element, cloakVals[i++]));\n\n  return failedElements;\n}\n\n/*\nSince the Angular renderer code will return a collection of inserted\nnodes in all areas of a DOM tree, it's up to this algorithm to figure\nout which nodes are roots for each animation @trigger.\n\nBy placing each inserted node into a Set and traversing upwards, it\nis possible to find the @trigger elements and well any direct *star\ninsertion nodes, if a @trigger root is found then the enter element\nis placed into the Map[@trigger] spot.\n */\nfunction buildRootMap(roots: any[], nodes: any[]): Map<any, any[]> {\n  const rootMap = new Map<any, any[]>();\n  roots.forEach(root => rootMap.set(root, []));\n\n  if (nodes.length == 0) return rootMap;\n\n  const NULL_NODE = 1;\n  const nodeSet = new Set(nodes);\n  const localRootMap = new Map<any, any>();\n\n  function getRoot(node: any): any {\n    if (!node) return NULL_NODE;\n\n    let root = localRootMap.get(node);\n    if (root) return root;\n\n    const parent = node.parentNode;\n    if (rootMap.has(parent)) {  // ngIf inside @trigger\n      root = parent;\n    } else if (nodeSet.has(parent)) {  // ngIf inside ngIf\n      root = NULL_NODE;\n    } else {  // recurse upwards\n      root = getRoot(parent);\n    }\n\n    localRootMap.set(node, root);\n    return root;\n  }\n\n  nodes.forEach(node => {\n    const root = getRoot(node);\n    if (root !== NULL_NODE) {\n      rootMap.get(root)!.push(node);\n    }\n  });\n\n  return rootMap;\n}\n\nconst CLASSES_CACHE_KEY = '$$classes';\nfunction containsClass(element: any, className: string): boolean {\n  if (element.classList) {\n    return element.classList.contains(className);\n  } else {\n    const classes = element[CLASSES_CACHE_KEY];\n    return classes && classes[className];\n  }\n}\n\nfunction addClass(element: any, className: string) {\n  if (element.classList) {\n    element.classList.add(className);\n  } else {\n    let classes: {[className: string]: boolean} = element[CLASSES_CACHE_KEY];\n    if (!classes) {\n      classes = element[CLASSES_CACHE_KEY] = {};\n    }\n    classes[className] = true;\n  }\n}\n\nfunction removeClass(element: any, className: string) {\n  if (element.classList) {\n    element.classList.remove(className);\n  } else {\n    let classes: {[className: string]: boolean} = element[CLASSES_CACHE_KEY];\n    if (classes) {\n      delete classes[className];\n    }\n  }\n}\n\nfunction removeNodesAfterAnimationDone(\n    engine: TransitionAnimationEngine, element: any, players: AnimationPlayer[]) {\n  optimizeGroupPlayer(players).onDone(() => engine.processLeaveNode(element));\n}\n\nfunction flattenGroupPlayers(players: AnimationPlayer[]): AnimationPlayer[] {\n  const finalPlayers: AnimationPlayer[] = [];\n  _flattenGroupPlayersRecur(players, finalPlayers);\n  return finalPlayers;\n}\n\nfunction _flattenGroupPlayersRecur(players: AnimationPlayer[], finalPlayers: AnimationPlayer[]) {\n  for (let i = 0; i < players.length; i++) {\n    const player = players[i];\n    if (player instanceof AnimationGroupPlayer) {\n      _flattenGroupPlayersRecur(player.players, finalPlayers);\n    } else {\n      finalPlayers.push(player);\n    }\n  }\n}\n\nfunction objEquals(a: {[key: string]: any}, b: {[key: string]: any}): boolean {\n  const k1 = Object.keys(a);\n  const k2 = Object.keys(b);\n  if (k1.length != k2.length) return false;\n  for (let i = 0; i < k1.length; i++) {\n    const prop = k1[i];\n    if (!b.hasOwnProperty(prop) || a[prop] !== b[prop]) return false;\n  }\n  return true;\n}\n\nfunction replacePostStylesAsPre(\n    element: any, allPreStyleElements: Map<any, Set<string>>,\n    allPostStyleElements: Map<any, Set<string>>): boolean {\n  const postEntry = allPostStyleElements.get(element);\n  if (!postEntry) return false;\n\n  let preEntry = allPreStyleElements.get(element);\n  if (preEntry) {\n    postEntry.forEach(data => preEntry!.add(data));\n  } else {\n    allPreStyleElements.set(element, postEntry);\n  }\n\n  allPostStyleElements.delete(element);\n  return true;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {AnimationMetadata, AnimationPlayer, AnimationTriggerMetadata} from '@angular/animations';\nimport {TriggerAst} from '../dsl/animation_ast';\nimport {buildAnimationAst} from '../dsl/animation_ast_builder';\nimport {AnimationTrigger, buildTrigger} from '../dsl/animation_trigger';\nimport {AnimationStyleNormalizer} from '../dsl/style_normalization/animation_style_normalizer';\n\nimport {AnimationDriver} from './animation_driver';\nimport {parseTimelineCommand} from './shared';\nimport {TimelineAnimationEngine} from './timeline_animation_engine';\nimport {TransitionAnimationEngine} from './transition_animation_engine';\n\nexport class AnimationEngine {\n  private _transitionEngine: TransitionAnimationEngine;\n  private _timelineEngine: TimelineAnimationEngine;\n\n  private _triggerCache: {[key: string]: AnimationTrigger} = {};\n\n  // this method is designed to be overridden by the code that uses this engine\n  public onRemovalComplete = (element: any, context: any) => {};\n\n  constructor(\n      private bodyNode: any, private _driver: AnimationDriver,\n      normalizer: AnimationStyleNormalizer) {\n    this._transitionEngine = new TransitionAnimationEngine(bodyNode, _driver, normalizer);\n    this._timelineEngine = new TimelineAnimationEngine(bodyNode, _driver, normalizer);\n\n    this._transitionEngine.onRemovalComplete = (element: any, context: any) =>\n        this.onRemovalComplete(element, context);\n  }\n\n  registerTrigger(\n      componentId: string, namespaceId: string, hostElement: any, name: string,\n      metadata: AnimationTriggerMetadata): void {\n    const cacheKey = componentId + '-' + name;\n    let trigger = this._triggerCache[cacheKey];\n    if (!trigger) {\n      const errors: any[] = [];\n      const ast =\n          buildAnimationAst(this._driver, metadata as AnimationMetadata, errors) as TriggerAst;\n      if (errors.length) {\n        throw new Error(`The animation trigger \"${\n            name}\" has failed to build due to the following errors:\\n - ${errors.join('\\n - ')}`);\n      }\n      trigger = buildTrigger(name, ast);\n      this._triggerCache[cacheKey] = trigger;\n    }\n    this._transitionEngine.registerTrigger(namespaceId, name, trigger);\n  }\n\n  register(namespaceId: string, hostElement: any) {\n    this._transitionEngine.register(namespaceId, hostElement);\n  }\n\n  destroy(namespaceId: string, context: any) {\n    this._transitionEngine.destroy(namespaceId, context);\n  }\n\n  onInsert(namespaceId: string, element: any, parent: any, insertBefore: boolean): void {\n    this._transitionEngine.insertNode(namespaceId, element, parent, insertBefore);\n  }\n\n  onRemove(namespaceId: string, element: any, context: any, isHostElement?: boolean): void {\n    this._transitionEngine.removeNode(namespaceId, element, isHostElement || false, context);\n  }\n\n  disableAnimations(element: any, disable: boolean) {\n    this._transitionEngine.markElementAsDisabled(element, disable);\n  }\n\n  process(namespaceId: string, element: any, property: string, value: any) {\n    if (property.charAt(0) == '@') {\n      const [id, action] = parseTimelineCommand(property);\n      const args = value as any[];\n      this._timelineEngine.command(id, element, action, args);\n    } else {\n      this._transitionEngine.trigger(namespaceId, element, property, value);\n    }\n  }\n\n  listen(\n      namespaceId: string, element: any, eventName: string, eventPhase: string,\n      callback: (event: any) => any): () => any {\n    // @@listen\n    if (eventName.charAt(0) == '@') {\n      const [id, action] = parseTimelineCommand(eventName);\n      return this._timelineEngine.listen(id, element, action, callback);\n    }\n    return this._transitionEngine.listen(namespaceId, element, eventName, eventPhase, callback);\n  }\n\n  flush(microtaskId: number = -1): void {\n    this._transitionEngine.flush(microtaskId);\n  }\n\n  get players(): AnimationPlayer[] {\n    return (this._transitionEngine.players as AnimationPlayer[])\n        .concat(this._timelineEngine.players as AnimationPlayer[]);\n  }\n\n  whenRenderingDone(): Promise<any> {\n    return this._transitionEngine.whenRenderingDone();\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {eraseStyles, setStyles} from '../util';\n\n/**\n * Returns an instance of `SpecialCasedStyles` if and when any special (non animateable) styles are\n * detected.\n *\n * In CSS there exist properties that cannot be animated within a keyframe animation\n * (whether it be via CSS keyframes or web-animations) and the animation implementation\n * will ignore them. This function is designed to detect those special cased styles and\n * return a container that will be executed at the start and end of the animation.\n *\n * @returns an instance of `SpecialCasedStyles` if any special styles are detected otherwise `null`\n */\nexport function packageNonAnimatableStyles(\n    element: any, styles: {[key: string]: any}|{[key: string]: any}[]): SpecialCasedStyles|null {\n  let startStyles: {[key: string]: any}|null = null;\n  let endStyles: {[key: string]: any}|null = null;\n  if (Array.isArray(styles) && styles.length) {\n    startStyles = filterNonAnimatableStyles(styles[0]);\n    if (styles.length > 1) {\n      endStyles = filterNonAnimatableStyles(styles[styles.length - 1]);\n    }\n  } else if (styles) {\n    startStyles = filterNonAnimatableStyles(styles);\n  }\n\n  return (startStyles || endStyles) ? new SpecialCasedStyles(element, startStyles, endStyles) :\n                                      null;\n}\n\n/**\n * Designed to be executed during a keyframe-based animation to apply any special-cased styles.\n *\n * When started (when the `start()` method is run) then the provided `startStyles`\n * will be applied. When finished (when the `finish()` method is called) the\n * `endStyles` will be applied as well any any starting styles. Finally when\n * `destroy()` is called then all styles will be removed.\n */\nexport class SpecialCasedStyles {\n  static initialStylesByElement = new WeakMap<any, {[key: string]: any}>();\n\n  private _state = SpecialCasedStylesState.Pending;\n  private _initialStyles!: {[key: string]: any};\n\n  constructor(\n      private _element: any, private _startStyles: {[key: string]: any}|null,\n      private _endStyles: {[key: string]: any}|null) {\n    let initialStyles = SpecialCasedStyles.initialStylesByElement.get(_element);\n    if (!initialStyles) {\n      SpecialCasedStyles.initialStylesByElement.set(_element, initialStyles = {});\n    }\n    this._initialStyles = initialStyles;\n  }\n\n  start() {\n    if (this._state < SpecialCasedStylesState.Started) {\n      if (this._startStyles) {\n        setStyles(this._element, this._startStyles, this._initialStyles);\n      }\n      this._state = SpecialCasedStylesState.Started;\n    }\n  }\n\n  finish() {\n    this.start();\n    if (this._state < SpecialCasedStylesState.Finished) {\n      setStyles(this._element, this._initialStyles);\n      if (this._endStyles) {\n        setStyles(this._element, this._endStyles);\n        this._endStyles = null;\n      }\n      this._state = SpecialCasedStylesState.Started;\n    }\n  }\n\n  destroy() {\n    this.finish();\n    if (this._state < SpecialCasedStylesState.Destroyed) {\n      SpecialCasedStyles.initialStylesByElement.delete(this._element);\n      if (this._startStyles) {\n        eraseStyles(this._element, this._startStyles);\n        this._endStyles = null;\n      }\n      if (this._endStyles) {\n        eraseStyles(this._element, this._endStyles);\n        this._endStyles = null;\n      }\n      setStyles(this._element, this._initialStyles);\n      this._state = SpecialCasedStylesState.Destroyed;\n    }\n  }\n}\n\n/**\n * An enum of states reflective of what the status of `SpecialCasedStyles` is.\n *\n * Depending on how `SpecialCasedStyles` is interacted with, the start and end\n * styles may not be applied in the same way. This enum ensures that if and when\n * the ending styles are applied then the starting styles are applied. It is\n * also used to reflect what the current status of the special cased styles are\n * which helps prevent the starting/ending styles not be applied twice. It is\n * also used to cleanup the styles once `SpecialCasedStyles` is destroyed.\n */\nconst enum SpecialCasedStylesState {\n  Pending = 0,\n  Started = 1,\n  Finished = 2,\n  Destroyed = 3,\n}\n\nfunction filterNonAnimatableStyles(styles: {[key: string]: any}) {\n  let result: {[key: string]: any}|null = null;\n  const props = Object.keys(styles);\n  for (let i = 0; i < props.length; i++) {\n    const prop = props[i];\n    if (isNonAnimatableStyle(prop)) {\n      result = result || {};\n      result[prop] = styles[prop];\n    }\n  }\n  return result;\n}\n\nfunction isNonAnimatableStyle(prop: string) {\n  return prop === 'display' || prop === 'position';\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst ELAPSED_TIME_MAX_DECIMAL_PLACES = 3;\nconst ANIMATION_PROP = 'animation';\nconst ANIMATIONEND_EVENT = 'animationend';\nconst ONE_SECOND = 1000;\n\nexport class ElementAnimationStyleHandler {\n  private readonly _eventFn: (e: any) => any;\n  private _finished = false;\n  private _destroyed = false;\n  private _startTime = 0;\n  private _position = 0;\n\n  constructor(\n      private readonly _element: any, private readonly _name: string,\n      private readonly _duration: number, private readonly _delay: number,\n      private readonly _easing: string, private readonly _fillMode: ''|'both'|'forwards',\n      private readonly _onDoneFn: () => any) {\n    this._eventFn = (e) => this._handleCallback(e);\n  }\n\n  apply() {\n    applyKeyframeAnimation(\n        this._element,\n        `${this._duration}ms ${this._easing} ${this._delay}ms 1 normal ${this._fillMode} ${\n            this._name}`);\n    addRemoveAnimationEvent(this._element, this._eventFn, false);\n    this._startTime = Date.now();\n  }\n\n  pause() {\n    playPauseAnimation(this._element, this._name, 'paused');\n  }\n\n  resume() {\n    playPauseAnimation(this._element, this._name, 'running');\n  }\n\n  setPosition(position: number) {\n    const index = findIndexForAnimation(this._element, this._name);\n    this._position = position * this._duration;\n    setAnimationStyle(this._element, 'Delay', `-${this._position}ms`, index);\n  }\n\n  getPosition() {\n    return this._position;\n  }\n\n  private _handleCallback(event: any) {\n    const timestamp = event._ngTestManualTimestamp || Date.now();\n    const elapsedTime =\n        parseFloat(event.elapsedTime.toFixed(ELAPSED_TIME_MAX_DECIMAL_PLACES)) * ONE_SECOND;\n    if (event.animationName == this._name &&\n        Math.max(timestamp - this._startTime, 0) >= this._delay && elapsedTime >= this._duration) {\n      this.finish();\n    }\n  }\n\n  finish() {\n    if (this._finished) return;\n    this._finished = true;\n    this._onDoneFn();\n    addRemoveAnimationEvent(this._element, this._eventFn, true);\n  }\n\n  destroy() {\n    if (this._destroyed) return;\n    this._destroyed = true;\n    this.finish();\n    removeKeyframeAnimation(this._element, this._name);\n  }\n}\n\nfunction playPauseAnimation(element: any, name: string, status: 'running'|'paused') {\n  const index = findIndexForAnimation(element, name);\n  setAnimationStyle(element, 'PlayState', status, index);\n}\n\nfunction applyKeyframeAnimation(element: any, value: string): number {\n  const anim = getAnimationStyle(element, '').trim();\n  let index = 0;\n  if (anim.length) {\n    index = countChars(anim, ',') + 1;\n    value = `${anim}, ${value}`;\n  }\n  setAnimationStyle(element, '', value);\n  return index;\n}\n\nfunction removeKeyframeAnimation(element: any, name: string) {\n  const anim = getAnimationStyle(element, '');\n  const tokens = anim.split(',');\n  const index = findMatchingTokenIndex(tokens, name);\n  if (index >= 0) {\n    tokens.splice(index, 1);\n    const newValue = tokens.join(',');\n    setAnimationStyle(element, '', newValue);\n  }\n}\n\nfunction findIndexForAnimation(element: any, value: string) {\n  const anim = getAnimationStyle(element, '');\n  if (anim.indexOf(',') > 0) {\n    const tokens = anim.split(',');\n    return findMatchingTokenIndex(tokens, value);\n  }\n  return findMatchingTokenIndex([anim], value);\n}\n\nfunction findMatchingTokenIndex(tokens: string[], searchToken: string): number {\n  for (let i = 0; i < tokens.length; i++) {\n    if (tokens[i].indexOf(searchToken) >= 0) {\n      return i;\n    }\n  }\n  return -1;\n}\n\nfunction addRemoveAnimationEvent(element: any, fn: (e: any) => any, doRemove: boolean) {\n  doRemove ? element.removeEventListener(ANIMATIONEND_EVENT, fn) :\n             element.addEventListener(ANIMATIONEND_EVENT, fn);\n}\n\nfunction setAnimationStyle(element: any, name: string, value: string, index?: number) {\n  const prop = ANIMATION_PROP + name;\n  if (index != null) {\n    const oldValue = element.style[prop];\n    if (oldValue.length) {\n      const tokens = oldValue.split(',');\n      tokens[index] = value;\n      value = tokens.join(',');\n    }\n  }\n  element.style[prop] = value;\n}\n\nfunction getAnimationStyle(element: any, name: string) {\n  return element.style[ANIMATION_PROP + name];\n}\n\nfunction countChars(value: string, char: string): number {\n  let count = 0;\n  for (let i = 0; i < value.length; i++) {\n    const c = value.charAt(i);\n    if (c === char) count++;\n  }\n  return count;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {AnimationPlayer} from '@angular/animations';\n\nimport {computeStyle} from '../../util';\nimport {SpecialCasedStyles} from '../special_cased_styles';\nimport {ElementAnimationStyleHandler} from './element_animation_style_handler';\n\nconst DEFAULT_FILL_MODE = 'forwards';\nconst DEFAULT_EASING = 'linear';\n\nexport const enum AnimatorControlState {\n  INITIALIZED = 1,\n  STARTED = 2,\n  FINISHED = 3,\n  DESTROYED = 4\n}\n\nexport class CssKeyframesPlayer implements AnimationPlayer {\n  private _onDoneFns: Function[] = [];\n  private _onStartFns: Function[] = [];\n  private _onDestroyFns: Function[] = [];\n\n  private _started = false;\n  // TODO(issue/24571): remove '!'.\n  private _styler!: ElementAnimationStyleHandler;\n\n  // TODO(issue/24571): remove '!'.\n  public parentPlayer!: AnimationPlayer;\n  public readonly totalTime: number;\n  public readonly easing: string;\n  public currentSnapshot: {[key: string]: string} = {};\n\n  private _state: AnimatorControlState = 0;\n\n  constructor(\n      public readonly element: any, public readonly keyframes: {[key: string]: string|number}[],\n      public readonly animationName: string, private readonly _duration: number,\n      private readonly _delay: number, easing: string,\n      private readonly _finalStyles: {[key: string]: any},\n      private readonly _specialStyles?: SpecialCasedStyles|null) {\n    this.easing = easing || DEFAULT_EASING;\n    this.totalTime = _duration + _delay;\n    this._buildStyler();\n  }\n\n  onStart(fn: () => void): void {\n    this._onStartFns.push(fn);\n  }\n\n  onDone(fn: () => void): void {\n    this._onDoneFns.push(fn);\n  }\n\n  onDestroy(fn: () => void): void {\n    this._onDestroyFns.push(fn);\n  }\n\n  destroy() {\n    this.init();\n    if (this._state >= AnimatorControlState.DESTROYED) return;\n    this._state = AnimatorControlState.DESTROYED;\n    this._styler.destroy();\n    this._flushStartFns();\n    this._flushDoneFns();\n    if (this._specialStyles) {\n      this._specialStyles.destroy();\n    }\n    this._onDestroyFns.forEach(fn => fn());\n    this._onDestroyFns = [];\n  }\n\n  private _flushDoneFns() {\n    this._onDoneFns.forEach(fn => fn());\n    this._onDoneFns = [];\n  }\n\n  private _flushStartFns() {\n    this._onStartFns.forEach(fn => fn());\n    this._onStartFns = [];\n  }\n\n  finish() {\n    this.init();\n    if (this._state >= AnimatorControlState.FINISHED) return;\n    this._state = AnimatorControlState.FINISHED;\n    this._styler.finish();\n    this._flushStartFns();\n    if (this._specialStyles) {\n      this._specialStyles.finish();\n    }\n    this._flushDoneFns();\n  }\n\n  setPosition(value: number) {\n    this._styler.setPosition(value);\n  }\n\n  getPosition(): number {\n    return this._styler.getPosition();\n  }\n\n  hasStarted(): boolean {\n    return this._state >= AnimatorControlState.STARTED;\n  }\n  init(): void {\n    if (this._state >= AnimatorControlState.INITIALIZED) return;\n    this._state = AnimatorControlState.INITIALIZED;\n    const elm = this.element;\n    this._styler.apply();\n    if (this._delay) {\n      this._styler.pause();\n    }\n  }\n\n  play(): void {\n    this.init();\n    if (!this.hasStarted()) {\n      this._flushStartFns();\n      this._state = AnimatorControlState.STARTED;\n      if (this._specialStyles) {\n        this._specialStyles.start();\n      }\n    }\n    this._styler.resume();\n  }\n\n  pause(): void {\n    this.init();\n    this._styler.pause();\n  }\n  restart(): void {\n    this.reset();\n    this.play();\n  }\n  reset(): void {\n    this._styler.destroy();\n    this._buildStyler();\n    this._styler.apply();\n  }\n\n  private _buildStyler() {\n    this._styler = new ElementAnimationStyleHandler(\n        this.element, this.animationName, this._duration, this._delay, this.easing,\n        DEFAULT_FILL_MODE, () => this.finish());\n  }\n\n  /** @internal */\n  triggerCallback(phaseName: string): void {\n    const methods = phaseName == 'start' ? this._onStartFns : this._onDoneFns;\n    methods.forEach(fn => fn());\n    methods.length = 0;\n  }\n\n  beforeDestroy() {\n    this.init();\n    const styles: {[key: string]: string} = {};\n    if (this.hasStarted()) {\n      const finished = this._state >= AnimatorControlState.FINISHED;\n      Object.keys(this._finalStyles).forEach(prop => {\n        if (prop != 'offset') {\n          styles[prop] = finished ? this._finalStyles[prop] : computeStyle(this.element, prop);\n        }\n      });\n    }\n    this.currentSnapshot = styles;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {NoopAnimationPlayer} from '@angular/animations';\nimport {hypenatePropsObject} from '../shared';\n\nexport class DirectStylePlayer extends NoopAnimationPlayer {\n  private _startingStyles: {[key: string]: any}|null = {};\n  private __initialized = false;\n  private _styles: {[key: string]: any};\n\n  constructor(public element: any, styles: {[key: string]: any}) {\n    super();\n    this._styles = hypenatePropsObject(styles);\n  }\n\n  init() {\n    if (this.__initialized || !this._startingStyles) return;\n    this.__initialized = true;\n    Object.keys(this._styles).forEach(prop => {\n      this._startingStyles![prop] = this.element.style[prop];\n    });\n    super.init();\n  }\n\n  play() {\n    if (!this._startingStyles) return;\n    this.init();\n    Object.keys(this._styles)\n        .forEach(prop => this.element.style.setProperty(prop, this._styles[prop]));\n    super.play();\n  }\n\n  destroy() {\n    if (!this._startingStyles) return;\n    Object.keys(this._startingStyles).forEach(prop => {\n      const value = this._startingStyles![prop];\n      if (value) {\n        this.element.style.setProperty(prop, value);\n      } else {\n        this.element.style.removeProperty(prop);\n      }\n    });\n    this._startingStyles = null;\n    super.destroy();\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {AnimationPlayer, ɵStyleData} from '@angular/animations';\n\nimport {allowPreviousPlayerStylesMerge, balancePreviousStylesIntoKeyframes, computeStyle} from '../../util';\nimport {AnimationDriver} from '../animation_driver';\nimport {containsElement, hypenatePropsObject, invokeQuery, matchesElement, validateStyleProperty} from '../shared';\nimport {packageNonAnimatableStyles} from '../special_cased_styles';\n\nimport {CssKeyframesPlayer} from './css_keyframes_player';\nimport {DirectStylePlayer} from './direct_style_player';\n\nconst KEYFRAMES_NAME_PREFIX = 'gen_css_kf_';\nconst TAB_SPACE = ' ';\n\nexport class CssKeyframesDriver implements AnimationDriver {\n  private _count = 0;\n  private readonly _head: any = document.querySelector('head');\n  private _warningIssued = false;\n\n  validateStyleProperty(prop: string): boolean {\n    return validateStyleProperty(prop);\n  }\n\n  matchesElement(element: any, selector: string): boolean {\n    return matchesElement(element, selector);\n  }\n\n  containsElement(elm1: any, elm2: any): boolean {\n    return containsElement(elm1, elm2);\n  }\n\n  query(element: any, selector: string, multi: boolean): any[] {\n    return invokeQuery(element, selector, multi);\n  }\n\n  computeStyle(element: any, prop: string, defaultValue?: string): string {\n    return (window.getComputedStyle(element) as any)[prop] as string;\n  }\n\n  buildKeyframeElement(element: any, name: string, keyframes: {[key: string]: any}[]): any {\n    keyframes = keyframes.map(kf => hypenatePropsObject(kf));\n    let keyframeStr = `@keyframes ${name} {\\n`;\n    let tab = '';\n    keyframes.forEach(kf => {\n      tab = TAB_SPACE;\n      const offset = parseFloat(kf['offset']);\n      keyframeStr += `${tab}${offset * 100}% {\\n`;\n      tab += TAB_SPACE;\n      Object.keys(kf).forEach(prop => {\n        const value = kf[prop];\n        switch (prop) {\n          case 'offset':\n            return;\n          case 'easing':\n            if (value) {\n              keyframeStr += `${tab}animation-timing-function: ${value};\\n`;\n            }\n            return;\n          default:\n            keyframeStr += `${tab}${prop}: ${value};\\n`;\n            return;\n        }\n      });\n      keyframeStr += `${tab}}\\n`;\n    });\n    keyframeStr += `}\\n`;\n\n    const kfElm = document.createElement('style');\n    kfElm.innerHTML = keyframeStr;\n    return kfElm;\n  }\n\n  animate(\n      element: any, keyframes: ɵStyleData[], duration: number, delay: number, easing: string,\n      previousPlayers: AnimationPlayer[] = [], scrubberAccessRequested?: boolean): AnimationPlayer {\n    if (scrubberAccessRequested) {\n      this._notifyFaultyScrubber();\n    }\n\n    const previousCssKeyframePlayers = <CssKeyframesPlayer[]>previousPlayers.filter(\n        player => player instanceof CssKeyframesPlayer);\n\n    const previousStyles: {[key: string]: any} = {};\n\n    if (allowPreviousPlayerStylesMerge(duration, delay)) {\n      previousCssKeyframePlayers.forEach(player => {\n        let styles = player.currentSnapshot;\n        Object.keys(styles).forEach(prop => previousStyles[prop] = styles[prop]);\n      });\n    }\n\n    keyframes = balancePreviousStylesIntoKeyframes(element, keyframes, previousStyles);\n    const finalStyles = flattenKeyframesIntoStyles(keyframes);\n\n    // if there is no animation then there is no point in applying\n    // styles and waiting for an event to get fired. This causes lag.\n    // It's better to just directly apply the styles to the element\n    // via the direct styling animation player.\n    if (duration == 0) {\n      return new DirectStylePlayer(element, finalStyles);\n    }\n\n    const animationName = `${KEYFRAMES_NAME_PREFIX}${this._count++}`;\n    const kfElm = this.buildKeyframeElement(element, animationName, keyframes);\n    document.querySelector('head')!.appendChild(kfElm);\n\n    const specialStyles = packageNonAnimatableStyles(element, keyframes);\n    const player = new CssKeyframesPlayer(\n        element, keyframes, animationName, duration, delay, easing, finalStyles, specialStyles);\n\n    player.onDestroy(() => removeElement(kfElm));\n    return player;\n  }\n\n  private _notifyFaultyScrubber() {\n    if (!this._warningIssued) {\n      console.warn(\n          '@angular/animations: please load the web-animations.js polyfill to allow programmatic access...\\n',\n          '  visit http://bit.ly/IWukam to learn more about using the web-animation-js polyfill.');\n      this._warningIssued = true;\n    }\n  }\n}\n\nfunction flattenKeyframesIntoStyles(keyframes: null|{[key: string]: any}|\n                                    {[key: string]: any}[]): {[key: string]: any} {\n  let flatKeyframes: {[key: string]: any} = {};\n  if (keyframes) {\n    const kfs = Array.isArray(keyframes) ? keyframes : [keyframes];\n    kfs.forEach(kf => {\n      Object.keys(kf).forEach(prop => {\n        if (prop == 'offset' || prop == 'easing') return;\n        flatKeyframes[prop] = kf[prop];\n      });\n    });\n  }\n  return flatKeyframes;\n}\n\nfunction removeElement(node: any) {\n  node.parentNode.removeChild(node);\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {AnimationPlayer} from '@angular/animations';\n\nimport {computeStyle} from '../../util';\nimport {SpecialCasedStyles} from '../special_cased_styles';\n\nimport {DOMAnimation} from './dom_animation';\n\nexport class WebAnimationsPlayer implements AnimationPlayer {\n  private _onDoneFns: Function[] = [];\n  private _onStartFns: Function[] = [];\n  private _onDestroyFns: Function[] = [];\n  private _duration: number;\n  private _delay: number;\n  private _initialized = false;\n  private _finished = false;\n  private _started = false;\n  private _destroyed = false;\n  // TODO(issue/24571): remove '!'.\n  private _finalKeyframe!: {[key: string]: string|number};\n\n  // TODO(issue/24571): remove '!'.\n  public readonly domPlayer!: DOMAnimation;\n  public time = 0;\n\n  public parentPlayer: AnimationPlayer|null = null;\n  public currentSnapshot: {[styleName: string]: string|number} = {};\n\n  constructor(\n      public element: any, public keyframes: {[key: string]: string|number}[],\n      public options: {[key: string]: string|number},\n      private _specialStyles?: SpecialCasedStyles|null) {\n    this._duration = <number>options['duration'];\n    this._delay = <number>options['delay'] || 0;\n    this.time = this._duration + this._delay;\n  }\n\n  private _onFinish() {\n    if (!this._finished) {\n      this._finished = true;\n      this._onDoneFns.forEach(fn => fn());\n      this._onDoneFns = [];\n    }\n  }\n\n  init(): void {\n    this._buildPlayer();\n    this._preparePlayerBeforeStart();\n  }\n\n  private _buildPlayer(): void {\n    if (this._initialized) return;\n    this._initialized = true;\n\n    const keyframes = this.keyframes;\n    (this as {domPlayer: DOMAnimation}).domPlayer =\n        this._triggerWebAnimation(this.element, keyframes, this.options);\n    this._finalKeyframe = keyframes.length ? keyframes[keyframes.length - 1] : {};\n    this.domPlayer.addEventListener('finish', () => this._onFinish());\n  }\n\n  private _preparePlayerBeforeStart() {\n    // this is required so that the player doesn't start to animate right away\n    if (this._delay) {\n      this._resetDomPlayerState();\n    } else {\n      this.domPlayer.pause();\n    }\n  }\n\n  /** @internal */\n  _triggerWebAnimation(element: any, keyframes: any[], options: any): DOMAnimation {\n    // jscompiler doesn't seem to know animate is a native property because it's not fully\n    // supported yet across common browsers (we polyfill it for Edge/Safari) [CL #143630929]\n    return element['animate'](keyframes, options) as DOMAnimation;\n  }\n\n  onStart(fn: () => void): void {\n    this._onStartFns.push(fn);\n  }\n\n  onDone(fn: () => void): void {\n    this._onDoneFns.push(fn);\n  }\n\n  onDestroy(fn: () => void): void {\n    this._onDestroyFns.push(fn);\n  }\n\n  play(): void {\n    this._buildPlayer();\n    if (!this.hasStarted()) {\n      this._onStartFns.forEach(fn => fn());\n      this._onStartFns = [];\n      this._started = true;\n      if (this._specialStyles) {\n        this._specialStyles.start();\n      }\n    }\n    this.domPlayer.play();\n  }\n\n  pause(): void {\n    this.init();\n    this.domPlayer.pause();\n  }\n\n  finish(): void {\n    this.init();\n    if (this._specialStyles) {\n      this._specialStyles.finish();\n    }\n    this._onFinish();\n    this.domPlayer.finish();\n  }\n\n  reset(): void {\n    this._resetDomPlayerState();\n    this._destroyed = false;\n    this._finished = false;\n    this._started = false;\n  }\n\n  private _resetDomPlayerState() {\n    if (this.domPlayer) {\n      this.domPlayer.cancel();\n    }\n  }\n\n  restart(): void {\n    this.reset();\n    this.play();\n  }\n\n  hasStarted(): boolean {\n    return this._started;\n  }\n\n  destroy(): void {\n    if (!this._destroyed) {\n      this._destroyed = true;\n      this._resetDomPlayerState();\n      this._onFinish();\n      if (this._specialStyles) {\n        this._specialStyles.destroy();\n      }\n      this._onDestroyFns.forEach(fn => fn());\n      this._onDestroyFns = [];\n    }\n  }\n\n  setPosition(p: number): void {\n    this.domPlayer.currentTime = p * this.time;\n  }\n\n  getPosition(): number {\n    return this.domPlayer.currentTime / this.time;\n  }\n\n  get totalTime(): number {\n    return this._delay + this._duration;\n  }\n\n  beforeDestroy() {\n    const styles: {[key: string]: string|number} = {};\n    if (this.hasStarted()) {\n      Object.keys(this._finalKeyframe).forEach(prop => {\n        if (prop != 'offset') {\n          styles[prop] =\n              this._finished ? this._finalKeyframe[prop] : computeStyle(this.element, prop);\n        }\n      });\n    }\n    this.currentSnapshot = styles;\n  }\n\n  /** @internal */\n  triggerCallback(phaseName: string): void {\n    const methods = phaseName == 'start' ? this._onStartFns : this._onDoneFns;\n    methods.forEach(fn => fn());\n    methods.length = 0;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {AnimationPlayer, ɵStyleData} from '@angular/animations';\n\nimport {allowPreviousPlayerStylesMerge, balancePreviousStylesIntoKeyframes, copyStyles} from '../../util';\nimport {AnimationDriver} from '../animation_driver';\nimport {CssKeyframesDriver} from '../css_keyframes/css_keyframes_driver';\nimport {containsElement, invokeQuery, isBrowser, matchesElement, validateStyleProperty} from '../shared';\nimport {packageNonAnimatableStyles} from '../special_cased_styles';\n\nimport {WebAnimationsPlayer} from './web_animations_player';\n\nexport class WebAnimationsDriver implements AnimationDriver {\n  private _isNativeImpl = /\\{\\s*\\[native\\s+code\\]\\s*\\}/.test(getElementAnimateFn().toString());\n  private _cssKeyframesDriver = new CssKeyframesDriver();\n\n  validateStyleProperty(prop: string): boolean {\n    return validateStyleProperty(prop);\n  }\n\n  matchesElement(element: any, selector: string): boolean {\n    return matchesElement(element, selector);\n  }\n\n  containsElement(elm1: any, elm2: any): boolean {\n    return containsElement(elm1, elm2);\n  }\n\n  query(element: any, selector: string, multi: boolean): any[] {\n    return invokeQuery(element, selector, multi);\n  }\n\n  computeStyle(element: any, prop: string, defaultValue?: string): string {\n    return (window.getComputedStyle(element) as any)[prop] as string;\n  }\n\n  overrideWebAnimationsSupport(supported: boolean) {\n    this._isNativeImpl = supported;\n  }\n\n  animate(\n      element: any, keyframes: ɵStyleData[], duration: number, delay: number, easing: string,\n      previousPlayers: AnimationPlayer[] = [], scrubberAccessRequested?: boolean): AnimationPlayer {\n    const useKeyframes = !scrubberAccessRequested && !this._isNativeImpl;\n    if (useKeyframes) {\n      return this._cssKeyframesDriver.animate(\n          element, keyframes, duration, delay, easing, previousPlayers);\n    }\n\n    const fill = delay == 0 ? 'both' : 'forwards';\n    const playerOptions: {[key: string]: string|number} = {duration, delay, fill};\n    // we check for this to avoid having a null|undefined value be present\n    // for the easing (which results in an error for certain browsers #9752)\n    if (easing) {\n      playerOptions['easing'] = easing;\n    }\n\n    const previousStyles: {[key: string]: any} = {};\n    const previousWebAnimationPlayers = <WebAnimationsPlayer[]>previousPlayers.filter(\n        player => player instanceof WebAnimationsPlayer);\n\n    if (allowPreviousPlayerStylesMerge(duration, delay)) {\n      previousWebAnimationPlayers.forEach(player => {\n        let styles = player.currentSnapshot;\n        Object.keys(styles).forEach(prop => previousStyles[prop] = styles[prop]);\n      });\n    }\n\n    keyframes = keyframes.map(styles => copyStyles(styles, false));\n    keyframes = balancePreviousStylesIntoKeyframes(element, keyframes, previousStyles);\n    const specialStyles = packageNonAnimatableStyles(element, keyframes);\n    return new WebAnimationsPlayer(element, keyframes, playerOptions, specialStyles);\n  }\n}\n\nexport function supportsWebAnimations() {\n  return typeof getElementAnimateFn() === 'function';\n}\n\nfunction getElementAnimateFn(): any {\n  return (isBrowser() && (<any>Element).prototype['animate']) || {};\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nexport {Animation as ɵAnimation} from './dsl/animation';\nexport {AnimationStyleNormalizer as ɵAnimationStyleNormalizer, NoopAnimationStyleNormalizer as ɵNoopAnimationStyleNormalizer} from './dsl/style_normalization/animation_style_normalizer';\nexport {WebAnimationsStyleNormalizer as ɵWebAnimationsStyleNormalizer} from './dsl/style_normalization/web_animations_style_normalizer';\nexport {NoopAnimationDriver as ɵNoopAnimationDriver} from './render/animation_driver';\nexport {AnimationEngine as ɵAnimationEngine} from './render/animation_engine_next';\nexport {CssKeyframesDriver as ɵCssKeyframesDriver} from './render/css_keyframes/css_keyframes_driver';\nexport {CssKeyframesPlayer as ɵCssKeyframesPlayer} from './render/css_keyframes/css_keyframes_player';\nexport {containsElement as ɵcontainsElement, invokeQuery as ɵinvokeQuery, matchesElement as ɵmatchesElement, validateStyleProperty as ɵvalidateStyleProperty} from './render/shared';\nexport {supportsWebAnimations as ɵsupportsWebAnimations, WebAnimationsDriver as ɵWebAnimationsDriver} from './render/web_animations/web_animations_driver';\nexport {WebAnimationsPlayer as ɵWebAnimationsPlayer} from './render/web_animations/web_animations_player';\nexport {allowPreviousPlayerStylesMerge as ɵallowPreviousPlayerStylesMerge} from './util';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @module\n * @description\n * Entry point for all animation APIs of the animation browser package.\n */\nexport {AnimationDriver} from './render/animation_driver';\nexport * from './private_export';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @module\n * @description\n * Entry point for all public APIs of this package.\n */\nexport * from './src/browser';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n// This file is not used to build this module. It is only used during editing\n// by the TypeScript language service and during build for verifcation. `ngc`\n// replaces this file with production index.ts when it rewrites private symbol\n// names.\n\nexport * from './public_api';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './index';\n\nexport {SpecialCasedStyles as ɵangular_packages_animations_browser_browser_a} from './src/render/special_cased_styles';","import { async } from '../scheduler/async';\nimport { TimeoutError } from '../util/TimeoutError';\nimport { timeoutWith } from './timeoutWith';\nimport { throwError } from '../observable/throwError';\nexport function timeout(due, scheduler = async) {\n    return timeoutWith(due, throwError(new TimeoutError()), scheduler);\n}\n//# sourceMappingURL=timeout.js.map","import { SubscribeOnObservable } from '../observable/SubscribeOnObservable';\nexport function subscribeOn(scheduler, delay = 0) {\n    return function subscribeOnOperatorFunction(source) {\n        return source.lift(new SubscribeOnOperator(scheduler, delay));\n    };\n}\nclass SubscribeOnOperator {\n    constructor(scheduler, delay) {\n        this.scheduler = scheduler;\n        this.delay = delay;\n    }\n    call(subscriber, source) {\n        return new SubscribeOnObservable(source, this.delay, this.scheduler).subscribe(subscriber);\n    }\n}\n//# sourceMappingURL=subscribeOn.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Observable} from 'rxjs';\nimport {HttpRequest} from './request';\nimport {HttpEvent} from './response';\n\n/**\n * Transforms an `HttpRequest` into a stream of `HttpEvent`s, one of which will likely be a\n * `HttpResponse`.\n *\n * `HttpHandler` is injectable. When injected, the handler instance dispatches requests to the\n * first interceptor in the chain, which dispatches to the second, etc, eventually reaching the\n * `HttpBackend`.\n *\n * In an `HttpInterceptor`, the `HttpHandler` parameter is the next interceptor in the chain.\n *\n * @publicApi\n */\nexport abstract class HttpHandler {\n  abstract handle(req: HttpRequest<any>): Observable<HttpEvent<any>>;\n}\n\n/**\n * A final `HttpHandler` which will dispatch the request via browser HTTP APIs to a backend.\n *\n * Interceptors sit between the `HttpClient` interface and the `HttpBackend`.\n *\n * When injected, `HttpBackend` dispatches requests directly to the backend, without going\n * through the interceptor chain.\n *\n * @publicApi\n */\nexport abstract class HttpBackend implements HttpHandler {\n  abstract handle(req: HttpRequest<any>): Observable<HttpEvent<any>>;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\ninterface Update {\n  name: string;\n  value?: string|string[];\n  op: 'a'|'s'|'d';\n}\n\n/**\n * Represents the header configuration options for an HTTP request.\n * Instances are immutable. Modifying methods return a cloned\n * instance with the change. The original object is never changed.\n *\n * @publicApi\n */\nexport class HttpHeaders {\n  /**\n   * Internal map of lowercase header names to values.\n   */\n  // TODO(issue/24571): remove '!'.\n  private headers!: Map<string, string[]>;\n\n\n  /**\n   * Internal map of lowercased header names to the normalized\n   * form of the name (the form seen first).\n   */\n  private normalizedNames: Map<string, string> = new Map();\n\n  /**\n   * Complete the lazy initialization of this object (needed before reading).\n   */\n  private lazyInit!: HttpHeaders|Function|null;\n\n  /**\n   * Queued updates to be materialized the next initialization.\n   */\n  private lazyUpdate: Update[]|null = null;\n\n  /**  Constructs a new HTTP header object with the given values.*/\n\n  constructor(headers?: string|{[name: string]: string | string[]}) {\n    if (!headers) {\n      this.headers = new Map<string, string[]>();\n    } else if (typeof headers === 'string') {\n      this.lazyInit = () => {\n        this.headers = new Map<string, string[]>();\n        headers.split('\\n').forEach(line => {\n          const index = line.indexOf(':');\n          if (index > 0) {\n            const name = line.slice(0, index);\n            const key = name.toLowerCase();\n            const value = line.slice(index + 1).trim();\n            this.maybeSetNormalizedName(name, key);\n            if (this.headers.has(key)) {\n              this.headers.get(key)!.push(value);\n            } else {\n              this.headers.set(key, [value]);\n            }\n          }\n        });\n      };\n    } else {\n      this.lazyInit = () => {\n        this.headers = new Map<string, string[]>();\n        Object.keys(headers).forEach(name => {\n          let values: string|string[] = headers[name];\n          const key = name.toLowerCase();\n          if (typeof values === 'string') {\n            values = [values];\n          }\n          if (values.length > 0) {\n            this.headers.set(key, values);\n            this.maybeSetNormalizedName(name, key);\n          }\n        });\n      };\n    }\n  }\n\n  /**\n   * Checks for existence of a given header.\n   *\n   * @param name The header name to check for existence.\n   *\n   * @returns True if the header exists, false otherwise.\n   */\n  has(name: string): boolean {\n    this.init();\n\n    return this.headers.has(name.toLowerCase());\n  }\n\n  /**\n   * Retrieves the first value of a given header.\n   *\n   * @param name The header name.\n   *\n   * @returns The value string if the header exists, null otherwise\n   */\n  get(name: string): string|null {\n    this.init();\n\n    const values = this.headers.get(name.toLowerCase());\n    return values && values.length > 0 ? values[0] : null;\n  }\n\n  /**\n   * Retrieves the names of the headers.\n   *\n   * @returns A list of header names.\n   */\n  keys(): string[] {\n    this.init();\n\n    return Array.from(this.normalizedNames.values());\n  }\n\n  /**\n   * Retrieves a list of values for a given header.\n   *\n   * @param name The header name from which to retrieve values.\n   *\n   * @returns A string of values if the header exists, null otherwise.\n   */\n  getAll(name: string): string[]|null {\n    this.init();\n\n    return this.headers.get(name.toLowerCase()) || null;\n  }\n\n  /**\n   * Appends a new value to the existing set of values for a header\n   * and returns them in a clone of the original instance.\n   *\n   * @param name The header name for which to append the values.\n   * @param value The value to append.\n   *\n   * @returns A clone of the HTTP headers object with the value appended to the given header.\n   */\n\n  append(name: string, value: string|string[]): HttpHeaders {\n    return this.clone({name, value, op: 'a'});\n  }\n  /**\n   * Sets or modifies a value for a given header in a clone of the original instance.\n   * If the header already exists, its value is replaced with the given value\n   * in the returned object.\n   *\n   * @param name The header name.\n   * @param value The value or values to set or overide for the given header.\n   *\n   * @returns A clone of the HTTP headers object with the newly set header value.\n   */\n  set(name: string, value: string|string[]): HttpHeaders {\n    return this.clone({name, value, op: 's'});\n  }\n  /**\n   * Deletes values for a given header in a clone of the original instance.\n   *\n   * @param name The header name.\n   * @param value The value or values to delete for the given header.\n   *\n   * @returns A clone of the HTTP headers object with the given value deleted.\n   */\n  delete(name: string, value?: string|string[]): HttpHeaders {\n    return this.clone({name, value, op: 'd'});\n  }\n\n  private maybeSetNormalizedName(name: string, lcName: string): void {\n    if (!this.normalizedNames.has(lcName)) {\n      this.normalizedNames.set(lcName, name);\n    }\n  }\n\n  private init(): void {\n    if (!!this.lazyInit) {\n      if (this.lazyInit instanceof HttpHeaders) {\n        this.copyFrom(this.lazyInit);\n      } else {\n        this.lazyInit();\n      }\n      this.lazyInit = null;\n      if (!!this.lazyUpdate) {\n        this.lazyUpdate.forEach(update => this.applyUpdate(update));\n        this.lazyUpdate = null;\n      }\n    }\n  }\n\n  private copyFrom(other: HttpHeaders) {\n    other.init();\n    Array.from(other.headers.keys()).forEach(key => {\n      this.headers.set(key, other.headers.get(key)!);\n      this.normalizedNames.set(key, other.normalizedNames.get(key)!);\n    });\n  }\n\n  private clone(update: Update): HttpHeaders {\n    const clone = new HttpHeaders();\n    clone.lazyInit =\n        (!!this.lazyInit && this.lazyInit instanceof HttpHeaders) ? this.lazyInit : this;\n    clone.lazyUpdate = (this.lazyUpdate || []).concat([update]);\n    return clone;\n  }\n\n  private applyUpdate(update: Update): void {\n    const key = update.name.toLowerCase();\n    switch (update.op) {\n      case 'a':\n      case 's':\n        let value = update.value!;\n        if (typeof value === 'string') {\n          value = [value];\n        }\n        if (value.length === 0) {\n          return;\n        }\n        this.maybeSetNormalizedName(update.name, key);\n        const base = (update.op === 'a' ? this.headers.get(key) : undefined) || [];\n        base.push(...value);\n        this.headers.set(key, base);\n        break;\n      case 'd':\n        const toDelete = update.value as string | undefined;\n        if (!toDelete) {\n          this.headers.delete(key);\n          this.normalizedNames.delete(key);\n        } else {\n          let existing = this.headers.get(key);\n          if (!existing) {\n            return;\n          }\n          existing = existing.filter(value => toDelete.indexOf(value) === -1);\n          if (existing.length === 0) {\n            this.headers.delete(key);\n            this.normalizedNames.delete(key);\n          } else {\n            this.headers.set(key, existing);\n          }\n        }\n        break;\n    }\n  }\n\n  /**\n   * @internal\n   */\n  forEach(fn: (name: string, values: string[]) => void) {\n    this.init();\n    Array.from(this.normalizedNames.keys())\n        .forEach(key => fn(this.normalizedNames.get(key)!, this.headers.get(key)!));\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * A codec for encoding and decoding parameters in URLs.\n *\n * Used by `HttpParams`.\n *\n * @publicApi\n **/\nexport interface HttpParameterCodec {\n  encodeKey(key: string): string;\n  encodeValue(value: string): string;\n\n  decodeKey(key: string): string;\n  decodeValue(value: string): string;\n}\n\n/**\n * Provides encoding and decoding of URL parameter and query-string values.\n *\n * Serializes and parses URL parameter keys and values to encode and decode them.\n * If you pass URL query parameters without encoding,\n * the query parameters can be misinterpreted at the receiving end.\n *\n *\n * @publicApi\n */\nexport class HttpUrlEncodingCodec implements HttpParameterCodec {\n  /**\n   * Encodes a key name for a URL parameter or query-string.\n   * @param key The key name.\n   * @returns The encoded key name.\n   */\n  encodeKey(key: string): string {\n    return standardEncoding(key);\n  }\n\n  /**\n   * Encodes the value of a URL parameter or query-string.\n   * @param value The value.\n   * @returns The encoded value.\n   */\n  encodeValue(value: string): string {\n    return standardEncoding(value);\n  }\n\n  /**\n   * Decodes an encoded URL parameter or query-string key.\n   * @param key The encoded key name.\n   * @returns The decoded key name.\n   */\n  decodeKey(key: string): string {\n    return decodeURIComponent(key);\n  }\n\n  /**\n   * Decodes an encoded URL parameter or query-string value.\n   * @param value The encoded value.\n   * @returns The decoded value.\n   */\n  decodeValue(value: string) {\n    return decodeURIComponent(value);\n  }\n}\n\n\nfunction paramParser(rawParams: string, codec: HttpParameterCodec): Map<string, string[]> {\n  const map = new Map<string, string[]>();\n  if (rawParams.length > 0) {\n    const params: string[] = rawParams.split('&');\n    params.forEach((param: string) => {\n      const eqIdx = param.indexOf('=');\n      const [key, val]: string[] = eqIdx == -1 ?\n          [codec.decodeKey(param), ''] :\n          [codec.decodeKey(param.slice(0, eqIdx)), codec.decodeValue(param.slice(eqIdx + 1))];\n      const list = map.get(key) || [];\n      list.push(val);\n      map.set(key, list);\n    });\n  }\n  return map;\n}\nfunction standardEncoding(v: string): string {\n  return encodeURIComponent(v)\n      .replace(/%40/gi, '@')\n      .replace(/%3A/gi, ':')\n      .replace(/%24/gi, '$')\n      .replace(/%2C/gi, ',')\n      .replace(/%3B/gi, ';')\n      .replace(/%2B/gi, '+')\n      .replace(/%3D/gi, '=')\n      .replace(/%3F/gi, '?')\n      .replace(/%2F/gi, '/');\n}\n\ninterface Update {\n  param: string;\n  value?: string;\n  op: 'a'|'d'|'s';\n}\n\n/**\n * Options used to construct an `HttpParams` instance.\n *\n * @publicApi\n */\nexport interface HttpParamsOptions {\n  /**\n   * String representation of the HTTP parameters in URL-query-string format.\n   * Mutually exclusive with `fromObject`.\n   */\n  fromString?: string;\n\n  /** Object map of the HTTP parameters. Mutually exclusive with `fromString`. */\n  fromObject?: {[param: string]: string|ReadonlyArray<string>};\n\n  /** Encoding codec used to parse and serialize the parameters. */\n  encoder?: HttpParameterCodec;\n}\n\n/**\n * An HTTP request/response body that represents serialized parameters,\n * per the MIME type `application/x-www-form-urlencoded`.\n *\n * This class is immutable; all mutation operations return a new instance.\n *\n * @publicApi\n */\nexport class HttpParams {\n  private map: Map<string, string[]>|null;\n  private encoder: HttpParameterCodec;\n  private updates: Update[]|null = null;\n  private cloneFrom: HttpParams|null = null;\n\n  constructor(options: HttpParamsOptions = {} as HttpParamsOptions) {\n    this.encoder = options.encoder || new HttpUrlEncodingCodec();\n    if (!!options.fromString) {\n      if (!!options.fromObject) {\n        throw new Error(`Cannot specify both fromString and fromObject.`);\n      }\n      this.map = paramParser(options.fromString, this.encoder);\n    } else if (!!options.fromObject) {\n      this.map = new Map<string, string[]>();\n      Object.keys(options.fromObject).forEach(key => {\n        const value = (options.fromObject as any)[key];\n        this.map!.set(key, Array.isArray(value) ? value : [value]);\n      });\n    } else {\n      this.map = null;\n    }\n  }\n\n  /**\n   * Reports whether the body includes one or more values for a given parameter.\n   * @param param The parameter name.\n   * @returns True if the parameter has one or more values,\n   * false if it has no value or is not present.\n   */\n  has(param: string): boolean {\n    this.init();\n    return this.map!.has(param);\n  }\n\n  /**\n   * Retrieves the first value for a parameter.\n   * @param param The parameter name.\n   * @returns The first value of the given parameter,\n   * or `null` if the parameter is not present.\n   */\n  get(param: string): string|null {\n    this.init();\n    const res = this.map!.get(param);\n    return !!res ? res[0] : null;\n  }\n\n  /**\n   * Retrieves all values for a  parameter.\n   * @param param The parameter name.\n   * @returns All values in a string array,\n   * or `null` if the parameter not present.\n   */\n  getAll(param: string): string[]|null {\n    this.init();\n    return this.map!.get(param) || null;\n  }\n\n  /**\n   * Retrieves all the parameters for this body.\n   * @returns The parameter names in a string array.\n   */\n  keys(): string[] {\n    this.init();\n    return Array.from(this.map!.keys());\n  }\n\n  /**\n   * Appends a new value to existing values for a parameter.\n   * @param param The parameter name.\n   * @param value The new value to add.\n   * @return A new body with the appended value.\n   */\n  append(param: string, value: string): HttpParams {\n    return this.clone({param, value, op: 'a'});\n  }\n\n  /**\n   * Replaces the value for a parameter.\n   * @param param The parameter name.\n   * @param value The new value.\n   * @return A new body with the new value.\n   */\n  set(param: string, value: string): HttpParams {\n    return this.clone({param, value, op: 's'});\n  }\n\n  /**\n   * Removes a given value or all values from a parameter.\n   * @param param The parameter name.\n   * @param value The value to remove, if provided.\n   * @return A new body with the given value removed, or with all values\n   * removed if no value is specified.\n   */\n  delete(param: string, value?: string): HttpParams {\n    return this.clone({param, value, op: 'd'});\n  }\n\n  /**\n   * Serializes the body to an encoded string, where key-value pairs (separated by `=`) are\n   * separated by `&`s.\n   */\n  toString(): string {\n    this.init();\n    return this.keys()\n        .map(key => {\n          const eKey = this.encoder.encodeKey(key);\n          // `a: ['1']` produces `'a=1'`\n          // `b: []` produces `''`\n          // `c: ['1', '2']` produces `'c=1&c=2'`\n          return this.map!.get(key)!.map(value => eKey + '=' + this.encoder.encodeValue(value))\n              .join('&');\n        })\n        // filter out empty values because `b: []` produces `''`\n        // which results in `a=1&&c=1&c=2` instead of `a=1&c=1&c=2` if we don't\n        .filter(param => param !== '')\n        .join('&');\n  }\n\n  private clone(update: Update): HttpParams {\n    const clone = new HttpParams({encoder: this.encoder} as HttpParamsOptions);\n    clone.cloneFrom = this.cloneFrom || this;\n    clone.updates = (this.updates || []).concat([update]);\n    return clone;\n  }\n\n  private init() {\n    if (this.map === null) {\n      this.map = new Map<string, string[]>();\n    }\n    if (this.cloneFrom !== null) {\n      this.cloneFrom.init();\n      this.cloneFrom.keys().forEach(key => this.map!.set(key, this.cloneFrom!.map!.get(key)!));\n      this.updates!.forEach(update => {\n        switch (update.op) {\n          case 'a':\n          case 's':\n            const base = (update.op === 'a' ? this.map!.get(update.param) : undefined) || [];\n            base.push(update.value!);\n            this.map!.set(update.param, base);\n            break;\n          case 'd':\n            if (update.value !== undefined) {\n              let base = this.map!.get(update.param) || [];\n              const idx = base.indexOf(update.value);\n              if (idx !== -1) {\n                base.splice(idx, 1);\n              }\n              if (base.length > 0) {\n                this.map!.set(update.param, base);\n              } else {\n                this.map!.delete(update.param);\n              }\n            } else {\n              this.map!.delete(update.param);\n              break;\n            }\n        }\n      });\n      this.cloneFrom = this.updates = null;\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {HttpHeaders} from './headers';\nimport {HttpParams} from './params';\n\n/**\n * Construction interface for `HttpRequest`s.\n *\n * All values are optional and will override default values if provided.\n */\ninterface HttpRequestInit {\n  headers?: HttpHeaders;\n  reportProgress?: boolean;\n  params?: HttpParams;\n  responseType?: 'arraybuffer'|'blob'|'json'|'text';\n  withCredentials?: boolean;\n}\n\n/**\n * Determine whether the given HTTP method may include a body.\n */\nfunction mightHaveBody(method: string): boolean {\n  switch (method) {\n    case 'DELETE':\n    case 'GET':\n    case 'HEAD':\n    case 'OPTIONS':\n    case 'JSONP':\n      return false;\n    default:\n      return true;\n  }\n}\n\n/**\n * Safely assert whether the given value is an ArrayBuffer.\n *\n * In some execution environments ArrayBuffer is not defined.\n */\nfunction isArrayBuffer(value: any): value is ArrayBuffer {\n  return typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer;\n}\n\n/**\n * Safely assert whether the given value is a Blob.\n *\n * In some execution environments Blob is not defined.\n */\nfunction isBlob(value: any): value is Blob {\n  return typeof Blob !== 'undefined' && value instanceof Blob;\n}\n\n/**\n * Safely assert whether the given value is a FormData instance.\n *\n * In some execution environments FormData is not defined.\n */\nfunction isFormData(value: any): value is FormData {\n  return typeof FormData !== 'undefined' && value instanceof FormData;\n}\n\n/**\n * An outgoing HTTP request with an optional typed body.\n *\n * `HttpRequest` represents an outgoing request, including URL, method,\n * headers, body, and other request configuration options. Instances should be\n * assumed to be immutable. To modify a `HttpRequest`, the `clone`\n * method should be used.\n *\n * @publicApi\n */\nexport class HttpRequest<T> {\n  /**\n   * The request body, or `null` if one isn't set.\n   *\n   * Bodies are not enforced to be immutable, as they can include a reference to any\n   * user-defined data type. However, interceptors should take care to preserve\n   * idempotence by treating them as such.\n   */\n  readonly body: T|null = null;\n\n  /**\n   * Outgoing headers for this request.\n   */\n  // TODO(issue/24571): remove '!'.\n  readonly headers!: HttpHeaders;\n\n  /**\n   * Whether this request should be made in a way that exposes progress events.\n   *\n   * Progress events are expensive (change detection runs on each event) and so\n   * they should only be requested if the consumer intends to monitor them.\n   */\n  readonly reportProgress: boolean = false;\n\n  /**\n   * Whether this request should be sent with outgoing credentials (cookies).\n   */\n  readonly withCredentials: boolean = false;\n\n  /**\n   * The expected response type of the server.\n   *\n   * This is used to parse the response appropriately before returning it to\n   * the requestee.\n   */\n  readonly responseType: 'arraybuffer'|'blob'|'json'|'text' = 'json';\n\n  /**\n   * The outgoing HTTP request method.\n   */\n  readonly method: string;\n\n  /**\n   * Outgoing URL parameters.\n   */\n  // TODO(issue/24571): remove '!'.\n  readonly params!: HttpParams;\n\n  /**\n   * The outgoing URL with all URL parameters set.\n   */\n  readonly urlWithParams: string;\n\n  constructor(method: 'DELETE'|'GET'|'HEAD'|'JSONP'|'OPTIONS', url: string, init?: {\n    headers?: HttpHeaders,\n    reportProgress?: boolean,\n    params?: HttpParams,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  });\n  constructor(method: 'POST'|'PUT'|'PATCH', url: string, body: T|null, init?: {\n    headers?: HttpHeaders,\n    reportProgress?: boolean,\n    params?: HttpParams,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  });\n  constructor(method: string, url: string, body: T|null, init?: {\n    headers?: HttpHeaders,\n    reportProgress?: boolean,\n    params?: HttpParams,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  });\n  constructor(\n      method: string, readonly url: string, third?: T|{\n        headers?: HttpHeaders,\n        reportProgress?: boolean,\n        params?: HttpParams,\n        responseType?: 'arraybuffer'|'blob'|'json'|'text',\n        withCredentials?: boolean,\n      }|null,\n      fourth?: {\n        headers?: HttpHeaders,\n        reportProgress?: boolean,\n        params?: HttpParams,\n        responseType?: 'arraybuffer'|'blob'|'json'|'text',\n        withCredentials?: boolean,\n      }) {\n    this.method = method.toUpperCase();\n    // Next, need to figure out which argument holds the HttpRequestInit\n    // options, if any.\n    let options: HttpRequestInit|undefined;\n\n    // Check whether a body argument is expected. The only valid way to omit\n    // the body argument is to use a known no-body method like GET.\n    if (mightHaveBody(this.method) || !!fourth) {\n      // Body is the third argument, options are the fourth.\n      this.body = (third !== undefined) ? third as T : null;\n      options = fourth;\n    } else {\n      // No body required, options are the third argument. The body stays null.\n      options = third as HttpRequestInit;\n    }\n\n    // If options have been passed, interpret them.\n    if (options) {\n      // Normalize reportProgress and withCredentials.\n      this.reportProgress = !!options.reportProgress;\n      this.withCredentials = !!options.withCredentials;\n\n      // Override default response type of 'json' if one is provided.\n      if (!!options.responseType) {\n        this.responseType = options.responseType;\n      }\n\n      // Override headers if they're provided.\n      if (!!options.headers) {\n        this.headers = options.headers;\n      }\n\n      if (!!options.params) {\n        this.params = options.params;\n      }\n    }\n\n    // If no headers have been passed in, construct a new HttpHeaders instance.\n    if (!this.headers) {\n      this.headers = new HttpHeaders();\n    }\n\n    // If no parameters have been passed in, construct a new HttpUrlEncodedParams instance.\n    if (!this.params) {\n      this.params = new HttpParams();\n      this.urlWithParams = url;\n    } else {\n      // Encode the parameters to a string in preparation for inclusion in the URL.\n      const params = this.params.toString();\n      if (params.length === 0) {\n        // No parameters, the visible URL is just the URL given at creation time.\n        this.urlWithParams = url;\n      } else {\n        // Does the URL already have query parameters? Look for '?'.\n        const qIdx = url.indexOf('?');\n        // There are 3 cases to handle:\n        // 1) No existing parameters -> append '?' followed by params.\n        // 2) '?' exists and is followed by existing query string ->\n        //    append '&' followed by params.\n        // 3) '?' exists at the end of the url -> append params directly.\n        // This basically amounts to determining the character, if any, with\n        // which to join the URL and parameters.\n        const sep: string = qIdx === -1 ? '?' : (qIdx < url.length - 1 ? '&' : '');\n        this.urlWithParams = url + sep + params;\n      }\n    }\n  }\n\n  /**\n   * Transform the free-form body into a serialized format suitable for\n   * transmission to the server.\n   */\n  serializeBody(): ArrayBuffer|Blob|FormData|string|null {\n    // If no body is present, no need to serialize it.\n    if (this.body === null) {\n      return null;\n    }\n    // Check whether the body is already in a serialized form. If so,\n    // it can just be returned directly.\n    if (isArrayBuffer(this.body) || isBlob(this.body) || isFormData(this.body) ||\n        typeof this.body === 'string') {\n      return this.body;\n    }\n    // Check whether the body is an instance of HttpUrlEncodedParams.\n    if (this.body instanceof HttpParams) {\n      return this.body.toString();\n    }\n    // Check whether the body is an object or array, and serialize with JSON if so.\n    if (typeof this.body === 'object' || typeof this.body === 'boolean' ||\n        Array.isArray(this.body)) {\n      return JSON.stringify(this.body);\n    }\n    // Fall back on toString() for everything else.\n    return (this.body as any).toString();\n  }\n\n  /**\n   * Examine the body and attempt to infer an appropriate MIME type\n   * for it.\n   *\n   * If no such type can be inferred, this method will return `null`.\n   */\n  detectContentTypeHeader(): string|null {\n    // An empty body has no content type.\n    if (this.body === null) {\n      return null;\n    }\n    // FormData bodies rely on the browser's content type assignment.\n    if (isFormData(this.body)) {\n      return null;\n    }\n    // Blobs usually have their own content type. If it doesn't, then\n    // no type can be inferred.\n    if (isBlob(this.body)) {\n      return this.body.type || null;\n    }\n    // Array buffers have unknown contents and thus no type can be inferred.\n    if (isArrayBuffer(this.body)) {\n      return null;\n    }\n    // Technically, strings could be a form of JSON data, but it's safe enough\n    // to assume they're plain strings.\n    if (typeof this.body === 'string') {\n      return 'text/plain';\n    }\n    // `HttpUrlEncodedParams` has its own content-type.\n    if (this.body instanceof HttpParams) {\n      return 'application/x-www-form-urlencoded;charset=UTF-8';\n    }\n    // Arrays, objects, and numbers will be encoded as JSON.\n    if (typeof this.body === 'object' || typeof this.body === 'number' ||\n        Array.isArray(this.body)) {\n      return 'application/json';\n    }\n    // No type could be inferred.\n    return null;\n  }\n\n  clone(): HttpRequest<T>;\n  clone(update: {\n    headers?: HttpHeaders,\n    reportProgress?: boolean,\n    params?: HttpParams,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n    body?: T|null,\n    method?: string,\n    url?: string,\n    setHeaders?: {[name: string]: string|string[]},\n    setParams?: {[param: string]: string},\n  }): HttpRequest<T>;\n  clone<V>(update: {\n    headers?: HttpHeaders,\n    reportProgress?: boolean,\n    params?: HttpParams,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n    body?: V|null,\n    method?: string,\n    url?: string,\n    setHeaders?: {[name: string]: string|string[]},\n    setParams?: {[param: string]: string},\n  }): HttpRequest<V>;\n  clone(update: {\n    headers?: HttpHeaders,\n    reportProgress?: boolean,\n    params?: HttpParams,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n    body?: any|null,\n    method?: string,\n    url?: string,\n    setHeaders?: {[name: string]: string|string[]},\n    setParams?: {[param: string]: string};\n  } = {}): HttpRequest<any> {\n    // For method, url, and responseType, take the current value unless\n    // it is overridden in the update hash.\n    const method = update.method || this.method;\n    const url = update.url || this.url;\n    const responseType = update.responseType || this.responseType;\n\n    // The body is somewhat special - a `null` value in update.body means\n    // whatever current body is present is being overridden with an empty\n    // body, whereas an `undefined` value in update.body implies no\n    // override.\n    const body = (update.body !== undefined) ? update.body : this.body;\n\n    // Carefully handle the boolean options to differentiate between\n    // `false` and `undefined` in the update args.\n    const withCredentials =\n        (update.withCredentials !== undefined) ? update.withCredentials : this.withCredentials;\n    const reportProgress =\n        (update.reportProgress !== undefined) ? update.reportProgress : this.reportProgress;\n\n    // Headers and params may be appended to if `setHeaders` or\n    // `setParams` are used.\n    let headers = update.headers || this.headers;\n    let params = update.params || this.params;\n\n    // Check whether the caller has asked to add headers.\n    if (update.setHeaders !== undefined) {\n      // Set every requested header.\n      headers =\n          Object.keys(update.setHeaders)\n              .reduce((headers, name) => headers.set(name, update.setHeaders![name]), headers);\n    }\n\n    // Check whether the caller has asked to set params.\n    if (update.setParams) {\n      // Set every requested param.\n      params = Object.keys(update.setParams)\n                   .reduce((params, param) => params.set(param, update.setParams![param]), params);\n    }\n\n    // Finally, construct the new HttpRequest using the pieces from above.\n    return new HttpRequest(method, url, body, {\n      params,\n      headers,\n      reportProgress,\n      responseType,\n      withCredentials,\n    });\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {HttpHeaders} from './headers';\n\n/**\n * Type enumeration for the different kinds of `HttpEvent`.\n *\n * @publicApi\n */\nexport enum HttpEventType {\n  /**\n   * The request was sent out over the wire.\n   */\n  Sent,\n\n  /**\n   * An upload progress event was received.\n   */\n  UploadProgress,\n\n  /**\n   * The response status code and headers were received.\n   */\n  ResponseHeader,\n\n  /**\n   * A download progress event was received.\n   */\n  DownloadProgress,\n\n  /**\n   * The full response including the body was received.\n   */\n  Response,\n\n  /**\n   * A custom event from an interceptor or a backend.\n   */\n  User,\n}\n\n/**\n * Base interface for progress events.\n *\n * @publicApi\n */\nexport interface HttpProgressEvent {\n  /**\n   * Progress event type is either upload or download.\n   */\n  type: HttpEventType.DownloadProgress|HttpEventType.UploadProgress;\n\n  /**\n   * Number of bytes uploaded or downloaded.\n   */\n  loaded: number;\n\n  /**\n   * Total number of bytes to upload or download. Depending on the request or\n   * response, this may not be computable and thus may not be present.\n   */\n  total?: number;\n}\n\n/**\n * A download progress event.\n *\n * @publicApi\n */\nexport interface HttpDownloadProgressEvent extends HttpProgressEvent {\n  type: HttpEventType.DownloadProgress;\n\n  /**\n   * The partial response body as downloaded so far.\n   *\n   * Only present if the responseType was `text`.\n   */\n  partialText?: string;\n}\n\n/**\n * An upload progress event.\n *\n * @publicApi\n */\nexport interface HttpUploadProgressEvent extends HttpProgressEvent {\n  type: HttpEventType.UploadProgress;\n}\n\n/**\n * An event indicating that the request was sent to the server. Useful\n * when a request may be retried multiple times, to distinguish between\n * retries on the final event stream.\n *\n * @publicApi\n */\nexport interface HttpSentEvent {\n  type: HttpEventType.Sent;\n}\n\n/**\n * A user-defined event.\n *\n * Grouping all custom events under this type ensures they will be handled\n * and forwarded by all implementations of interceptors.\n *\n * @publicApi\n */\nexport interface HttpUserEvent<T> {\n  type: HttpEventType.User;\n}\n\n/**\n * An error that represents a failed attempt to JSON.parse text coming back\n * from the server.\n *\n * It bundles the Error object with the actual response body that failed to parse.\n *\n *\n */\nexport interface HttpJsonParseError {\n  error: Error;\n  text: string;\n}\n\n/**\n * Union type for all possible events on the response stream.\n *\n * Typed according to the expected type of the response.\n *\n * @publicApi\n */\nexport type HttpEvent<T> =\n    HttpSentEvent|HttpHeaderResponse|HttpResponse<T>|HttpProgressEvent|HttpUserEvent<T>;\n\n/**\n * Base class for both `HttpResponse` and `HttpHeaderResponse`.\n *\n * @publicApi\n */\nexport abstract class HttpResponseBase {\n  /**\n   * All response headers.\n   */\n  readonly headers: HttpHeaders;\n\n  /**\n   * Response status code.\n   */\n  readonly status: number;\n\n  /**\n   * Textual description of response status code.\n   *\n   * Do not depend on this.\n   */\n  readonly statusText: string;\n\n  /**\n   * URL of the resource retrieved, or null if not available.\n   */\n  readonly url: string|null;\n\n  /**\n   * Whether the status code falls in the 2xx range.\n   */\n  readonly ok: boolean;\n\n  /**\n   * Type of the response, narrowed to either the full response or the header.\n   */\n  // TODO(issue/24571): remove '!'.\n  readonly type!: HttpEventType.Response|HttpEventType.ResponseHeader;\n\n  /**\n   * Super-constructor for all responses.\n   *\n   * The single parameter accepted is an initialization hash. Any properties\n   * of the response passed there will override the default values.\n   */\n  constructor(\n      init: {\n        headers?: HttpHeaders,\n        status?: number,\n        statusText?: string,\n        url?: string,\n      },\n      defaultStatus: number = 200, defaultStatusText: string = 'OK') {\n    // If the hash has values passed, use them to initialize the response.\n    // Otherwise use the default values.\n    this.headers = init.headers || new HttpHeaders();\n    this.status = init.status !== undefined ? init.status : defaultStatus;\n    this.statusText = init.statusText || defaultStatusText;\n    this.url = init.url || null;\n\n    // Cache the ok value to avoid defining a getter.\n    this.ok = this.status >= 200 && this.status < 300;\n  }\n}\n\n/**\n * A partial HTTP response which only includes the status and header data,\n * but no response body.\n *\n * `HttpHeaderResponse` is a `HttpEvent` available on the response\n * event stream, only when progress events are requested.\n *\n * @publicApi\n */\nexport class HttpHeaderResponse extends HttpResponseBase {\n  /**\n   * Create a new `HttpHeaderResponse` with the given parameters.\n   */\n  constructor(init: {\n    headers?: HttpHeaders,\n    status?: number,\n    statusText?: string,\n    url?: string,\n  } = {}) {\n    super(init);\n  }\n\n  readonly type: HttpEventType.ResponseHeader = HttpEventType.ResponseHeader;\n\n  /**\n   * Copy this `HttpHeaderResponse`, overriding its contents with the\n   * given parameter hash.\n   */\n  clone(update: {headers?: HttpHeaders; status?: number; statusText?: string; url?: string;} = {}):\n      HttpHeaderResponse {\n    // Perform a straightforward initialization of the new HttpHeaderResponse,\n    // overriding the current parameters with new ones if given.\n    return new HttpHeaderResponse({\n      headers: update.headers || this.headers,\n      status: update.status !== undefined ? update.status : this.status,\n      statusText: update.statusText || this.statusText,\n      url: update.url || this.url || undefined,\n    });\n  }\n}\n\n/**\n * A full HTTP response, including a typed response body (which may be `null`\n * if one was not returned).\n *\n * `HttpResponse` is a `HttpEvent` available on the response event\n * stream.\n *\n * @publicApi\n */\nexport class HttpResponse<T> extends HttpResponseBase {\n  /**\n   * The response body, or `null` if one was not returned.\n   */\n  readonly body: T|null;\n\n  /**\n   * Construct a new `HttpResponse`.\n   */\n  constructor(init: {\n    body?: T|null,\n    headers?: HttpHeaders;\n    status?: number;\n    statusText?: string;\n    url?: string;\n  } = {}) {\n    super(init);\n    this.body = init.body !== undefined ? init.body : null;\n  }\n\n  readonly type: HttpEventType.Response = HttpEventType.Response;\n\n  clone(): HttpResponse<T>;\n  clone(update: {headers?: HttpHeaders; status?: number; statusText?: string; url?: string;}):\n      HttpResponse<T>;\n  clone<V>(update: {\n    body?: V|null,\n    headers?: HttpHeaders;\n    status?: number;\n    statusText?: string;\n    url?: string;\n  }): HttpResponse<V>;\n  clone(update: {\n    body?: any|null;\n    headers?: HttpHeaders;\n    status?: number;\n    statusText?: string;\n    url?: string;\n  } = {}): HttpResponse<any> {\n    return new HttpResponse<any>({\n      body: (update.body !== undefined) ? update.body : this.body,\n      headers: update.headers || this.headers,\n      status: (update.status !== undefined) ? update.status : this.status,\n      statusText: update.statusText || this.statusText,\n      url: update.url || this.url || undefined,\n    });\n  }\n}\n\n/**\n * A response that represents an error or failure, either from a\n * non-successful HTTP status, an error while executing the request,\n * or some other failure which occurred during the parsing of the response.\n *\n * Any error returned on the `Observable` response stream will be\n * wrapped in an `HttpErrorResponse` to provide additional context about\n * the state of the HTTP layer when the error occurred. The error property\n * will contain either a wrapped Error object or the error response returned\n * from the server.\n *\n * @publicApi\n */\nexport class HttpErrorResponse extends HttpResponseBase implements Error {\n  readonly name = 'HttpErrorResponse';\n  readonly message: string;\n  readonly error: any|null;\n\n  /**\n   * Errors are never okay, even when the status code is in the 2xx success range.\n   */\n  readonly ok = false;\n\n  constructor(init: {\n    error?: any;\n    headers?: HttpHeaders;\n    status?: number;\n    statusText?: string;\n    url?: string;\n  }) {\n    // Initialize with a default status of 0 / Unknown Error.\n    super(init, 0, 'Unknown Error');\n\n    // If the response was successful, then this was a parse error. Otherwise, it was\n    // a protocol-level failure of some sort. Either the request failed in transit\n    // or the server returned an unsuccessful status code.\n    if (this.status >= 200 && this.status < 300) {\n      this.message = `Http failure during parsing for ${init.url || '(unknown url)'}`;\n    } else {\n      this.message = `Http failure response for ${init.url || '(unknown url)'}: ${init.status} ${\n          init.statusText}`;\n    }\n    this.error = init.error || null;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable} from '@angular/core';\nimport {Observable, of} from 'rxjs';\nimport {concatMap, filter, map} from 'rxjs/operators';\n\nimport {HttpHandler} from './backend';\nimport {HttpHeaders} from './headers';\nimport {HttpParams, HttpParamsOptions} from './params';\nimport {HttpRequest} from './request';\nimport {HttpEvent, HttpResponse} from './response';\n\n\n/**\n * Constructs an instance of `HttpRequestOptions<T>` from a source `HttpMethodOptions` and\n * the given `body`. This function clones the object and adds the body.\n *\n * Note that the `responseType` *options* value is a String that identifies the\n * single data type of the response.\n * A single overload version of the method handles each response type.\n * The value of `responseType` cannot be a union, as the combined signature could imply.\n *\n */\nfunction addBody<T>(\n    options: {\n      headers?: HttpHeaders|{[header: string]: string | string[]},\n      observe?: HttpObserve,\n      params?: HttpParams|{[param: string]: string | string[]},\n      reportProgress?: boolean,\n      responseType?: 'arraybuffer'|'blob'|'json'|'text',\n      withCredentials?: boolean,\n    },\n    body: T|null): any {\n  return {\n    body,\n    headers: options.headers,\n    observe: options.observe,\n    params: options.params,\n    reportProgress: options.reportProgress,\n    responseType: options.responseType,\n    withCredentials: options.withCredentials,\n  };\n}\n\nexport type HttpObserve = 'body'|'events'|'response';\n\n/**\n * Performs HTTP requests.\n * This service is available as an injectable class, with methods to perform HTTP requests.\n * Each request method has multiple signatures, and the return type varies based on\n * the signature that is called (mainly the values of `observe` and `responseType`).\n *\n * Note that the `responseType` *options* value is a String that identifies the\n * single data type of the response.\n * A single overload version of the method handles each response type.\n * The value of `responseType` cannot be a union, as the combined signature could imply.\n\n *\n * @usageNotes\n * Sample HTTP requests for the [Tour of Heroes](/tutorial/toh-pt0) application.\n *\n * ### HTTP Request Example\n *\n * ```\n *  // GET heroes whose name contains search term\n * searchHeroes(term: string): observable<Hero[]>{\n *\n *  const params = new HttpParams({fromString: 'name=term'});\n *    return this.httpClient.request('GET', this.heroesUrl, {responseType:'json', params});\n * }\n * ```\n * ### JSONP Example\n * ```\n * requestJsonp(url, callback = 'callback') {\n *  return this.httpClient.jsonp(this.heroesURL, callback);\n * }\n * ```\n *\n * ### PATCH Example\n * ```\n * // PATCH one of the heroes' name\n * patchHero (id: number, heroName: string): Observable<{}> {\n * const url = `${this.heroesUrl}/${id}`;   // PATCH api/heroes/42\n *  return this.httpClient.patch(url, {name: heroName}, httpOptions)\n *    .pipe(catchError(this.handleError('patchHero')));\n * }\n * ```\n *\n * @see [HTTP Guide](guide/http)\n *\n * @publicApi\n */\n@Injectable()\nexport class HttpClient {\n  constructor(private handler: HttpHandler) {}\n\n  /**\n   * Sends an `HTTPRequest` and returns a stream of `HTTPEvents`.\n   *\n   * @return An `Observable` of the response, with the response body as a stream of `HTTPEvents`.\n   */\n  request<R>(req: HttpRequest<any>): Observable<HttpEvent<R>>;\n\n  /**\n   * Constructs a request that interprets the body as an `ArrayBuffer` and returns the response in\n   * an `ArrayBuffer`.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   *\n   * @return An `Observable` of the response, with the response body as an `ArrayBuffer`.\n   */\n  request(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<ArrayBuffer>;\n\n  /**\n   * Constructs a request that interprets the body as a blob and returns\n   * the response as a blob.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body of type `Blob`.\n   */\n  request(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<Blob>;\n\n  /**\n   * Constructs a request that interprets the body as a text string and\n   * returns a string value.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body of type string.\n   */\n  request(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<string>;\n\n  /**\n   * Constructs a request that interprets the body as an `ArrayBuffer` and returns the\n   * the full event stream.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body as an array of `HTTPEvents` for\n   *     the\n   * request.\n   */\n  request(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    params?: HttpParams|{[param: string]: string | string[]}, observe: 'events',\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<ArrayBuffer>>;\n\n  /**\n   * Constructs a request that interprets the body as a `Blob` and returns\n   * the full event stream.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of of all `HttpEvents` for the request,\n   * with the response body of type `Blob`.\n   */\n  request(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Blob>>;\n\n  /**\n   * Constructs a request which interprets the body as a text string and returns the full event\n   * stream.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all `HttpEvents` for the reques,\n   * with the response body of type string.\n   */\n  request(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<string>>;\n\n  /**\n   * Constructs a request which interprets the body as a JSON object and returns the full event\n   * stream.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the  request.\n   *\n   * @return An `Observable` of all `HttpEvents` for the request,\n   *  with the response body of type `Object`.\n   */\n  request(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    reportProgress?: boolean, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<any>>;\n\n  /**\n   * Constructs a request which interprets the body as a JSON object and returns the full event\n   * stream.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all `HttpEvents` for the request,\n   * with the response body of type `R`.\n   */\n  request<R>(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    reportProgress?: boolean, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<R>>;\n\n  /**\n   * Constructs a request which interprets the body as an `ArrayBuffer`\n   * and returns the full `HTTPResponse`.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HTTPResponse`, with the response body as an `ArrayBuffer`.\n   */\n  request(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<ArrayBuffer>>;\n\n  /**\n   * Constructs a request which interprets the body as a `Blob` and returns the full `HTTPResponse`.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HTTPResponse`, with the response body of type `Blob`.\n   */\n  request(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Blob>>;\n\n  /**\n   * Constructs a request which interprets the body as a text stream and returns the full\n   * `HTTPResponse`.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the HTTP response, with the response body of type string.\n   */\n  request(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<string>>;\n\n  /**\n   * Constructs a request which interprets the body as a JSON object and returns the full\n   * `HTTPResponse`.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the full `HTTPResponse`,\n   * with the response body of type `Object`.\n   */\n  request(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    reportProgress?: boolean, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Object>>;\n\n  /**\n   * Constructs a request which interprets the body as a JSON object and returns\n   * the full `HTTPResponse` with the response body in the requested type.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return  An `Observable` of the full `HTTPResponse`, with the response body of type `R`.\n   */\n  request<R>(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    reportProgress?: boolean, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<R>>;\n\n  /**\n   * Constructs a request which interprets the body as a JSON object and returns the full\n   * `HTTPResponse` as a JSON object.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HTTPResponse`, with the response body of type `Object`.\n   */\n  request(method: string, url: string, options?: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    responseType?: 'json',\n    reportProgress?: boolean,\n    withCredentials?: boolean,\n  }): Observable<Object>;\n\n  /**\n   * Constructs a request which interprets the body as a JSON object\n   * with the response body of the requested type.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HTTPResponse`, with the response body of type `R`.\n   */\n  request<R>(method: string, url: string, options?: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    responseType?: 'json',\n    reportProgress?: boolean,\n    withCredentials?: boolean,\n  }): Observable<R>;\n\n  /**\n   * Constructs a request where response type and requested observable are not known statically.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the reuested response, wuth body of type `any`.\n   */\n  request(method: string, url: string, options?: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    params?: HttpParams|{[param: string]: string | string[]},\n    observe?: HttpObserve,\n    reportProgress?: boolean,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  }): Observable<any>;\n\n  /**\n   * Constructs an observable for a generic HTTP request that, when subscribed,\n   * fires the request through the chain of registered interceptors and on to the\n   * server.\n   *\n   * You can pass an `HttpRequest` directly as the only parameter. In this case,\n   * the call returns an observable of the raw `HttpEvent` stream.\n   *\n   * Alternatively you can pass an HTTP method as the first parameter,\n   * a URL string as the second, and an options hash containing the request body as the third.\n   * See `addBody()`. In this case, the specified `responseType` and `observe` options determine the\n   * type of returned observable.\n   *   * The `responseType` value determines how a successful response body is parsed.\n   *   * If `responseType` is the default `json`, you can pass a type interface for the resulting\n   * object as a type parameter to the call.\n   *\n   * The `observe` value determines the return type, according to what you are interested in\n   * observing.\n   *   * An `observe` value of events returns an observable of the raw `HttpEvent` stream, including\n   * progress events by default.\n   *   * An `observe` value of response returns an observable of `HttpResponse<T>`,\n   * where the `T` parameter depends on the `responseType` and any optionally provided type\n   * parameter.\n   *   * An `observe` value of body returns an observable of `<T>` with the same `T` body type.\n   *\n   */\n  request(first: string|HttpRequest<any>, url?: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: HttpObserve,\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  } = {}): Observable<any> {\n    let req: HttpRequest<any>;\n    // First, check whether the primary argument is an instance of `HttpRequest`.\n    if (first instanceof HttpRequest) {\n      // It is. The other arguments must be undefined (per the signatures) and can be\n      // ignored.\n      req = first;\n    } else {\n      // It's a string, so it represents a URL. Construct a request based on it,\n      // and incorporate the remaining arguments (assuming `GET` unless a method is\n      // provided.\n\n      // Figure out the headers.\n      let headers: HttpHeaders|undefined = undefined;\n      if (options.headers instanceof HttpHeaders) {\n        headers = options.headers;\n      } else {\n        headers = new HttpHeaders(options.headers);\n      }\n\n      // Sort out parameters.\n      let params: HttpParams|undefined = undefined;\n      if (!!options.params) {\n        if (options.params instanceof HttpParams) {\n          params = options.params;\n        } else {\n          params = new HttpParams({fromObject: options.params} as HttpParamsOptions);\n        }\n      }\n\n      // Construct the request.\n      req = new HttpRequest(first, url!, (options.body !== undefined ? options.body : null), {\n        headers,\n        params,\n        reportProgress: options.reportProgress,\n        // By default, JSON is assumed to be returned for all calls.\n        responseType: options.responseType || 'json',\n        withCredentials: options.withCredentials,\n      });\n    }\n\n    // Start with an Observable.of() the initial request, and run the handler (which\n    // includes all interceptors) inside a concatMap(). This way, the handler runs\n    // inside an Observable chain, which causes interceptors to be re-run on every\n    // subscription (this also makes retries re-run the handler, including interceptors).\n    const events$: Observable<HttpEvent<any>> =\n        of(req).pipe(concatMap((req: HttpRequest<any>) => this.handler.handle(req)));\n\n    // If coming via the API signature which accepts a previously constructed HttpRequest,\n    // the only option is to get the event stream. Otherwise, return the event stream if\n    // that is what was requested.\n    if (first instanceof HttpRequest || options.observe === 'events') {\n      return events$;\n    }\n\n    // The requested stream contains either the full response or the body. In either\n    // case, the first step is to filter the event stream to extract a stream of\n    // responses(s).\n    const res$: Observable<HttpResponse<any>> = <Observable<HttpResponse<any>>>events$.pipe(\n        filter((event: HttpEvent<any>) => event instanceof HttpResponse));\n\n    // Decide which stream to return.\n    switch (options.observe || 'body') {\n      case 'body':\n        // The requested stream is the body. Map the response stream to the response\n        // body. This could be done more simply, but a misbehaving interceptor might\n        // transform the response body into a different format and ignore the requested\n        // responseType. Guard against this by validating that the response is of the\n        // requested type.\n        switch (req.responseType) {\n          case 'arraybuffer':\n            return res$.pipe(map((res: HttpResponse<any>) => {\n              // Validate that the body is an ArrayBuffer.\n              if (res.body !== null && !(res.body instanceof ArrayBuffer)) {\n                throw new Error('Response is not an ArrayBuffer.');\n              }\n              return res.body;\n            }));\n          case 'blob':\n            return res$.pipe(map((res: HttpResponse<any>) => {\n              // Validate that the body is a Blob.\n              if (res.body !== null && !(res.body instanceof Blob)) {\n                throw new Error('Response is not a Blob.');\n              }\n              return res.body;\n            }));\n          case 'text':\n            return res$.pipe(map((res: HttpResponse<any>) => {\n              // Validate that the body is a string.\n              if (res.body !== null && typeof res.body !== 'string') {\n                throw new Error('Response is not a string.');\n              }\n              return res.body;\n            }));\n          case 'json':\n          default:\n            // No validation needed for JSON responses, as they can be of any type.\n            return res$.pipe(map((res: HttpResponse<any>) => res.body));\n        }\n      case 'response':\n        // The response stream was requested directly, so return it.\n        return res$;\n      default:\n        // Guard against new future observe types being added.\n        throw new Error(`Unreachable: unhandled observe type ${options.observe}}`);\n    }\n  }\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as an `ArrayBuffer`\n   *  and returns the response as an `ArrayBuffer`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return  An `Observable` of the response body as an `ArrayBuffer`.\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<ArrayBuffer>;\n\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as a `Blob` and returns\n   * the response as a `Blob`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response body as a `Blob`.\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<Blob>;\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as a text string and returns\n   * a string.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body of type string.\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<string>;\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as an `ArrayBuffer`\n   *  and returns the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all `HTTPEvents` for the request,\n   * with response body as an `ArrayBuffer`.\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<ArrayBuffer>>;\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as a `Blob`\n   *  and returns the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all the `HTTPEvents` for the request, with the response body as a\n   * `Blob`.\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Blob>>;\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as a text string\n   * and returns the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all `HTTPEvents` for the request, with the response\n   *  body of type string.\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<string>>;\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as a JSON object\n   * and returns the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all `HTTPEvents` for the request, with response body of\n   * type `Object`.\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Object>>;\n\n  /**\n   * Constructs a `DELETE`request that interprets the body as a JSON object\n   * and returns the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all the `HTTPEvents` for the request, with a response\n   * body in the requested type.\n   */\n  delete<T>(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<T>>;\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as an `ArrayBuffer` and returns\n   *  the full `HTTPResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the full `HTTPResponse`, with the response body as an `ArrayBuffer`.\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<ArrayBuffer>>;\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as a `Blob` and returns the full\n   * `HTTPResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HTTPResponse`, with the response body of type `Blob`.\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Blob>>;\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as a text stream and\n   *  returns the full `HTTPResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the full `HTTPResponse`, with the response body of type string.\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<string>>;\n\n  /**\n   * Constructs a `DELETE` request the interprets the body as a JSON object and returns\n   * the full `HTTPResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HTTPResponse`, with the response body of type `Object`.\n   *\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Object>>;\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as a JSON object\n   * and returns the full `HTTPResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HTTPResponse`, with the response body of the requested type.\n   */\n  delete<T>(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<T>>;\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as a JSON object and\n   * returns the response body as a JSON object.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body of type `Object`.\n   */\n  delete(url: string, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<Object>;\n\n  /**\n   * Constructs a DELETE request that interprets the body as a JSON object and returns\n   * the response in a given type.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HTTPResponse`, with response body in the requested type.\n   */\n  delete<T>(url: string, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<T>;\n\n  /**\n   * Constructs an observable that, when subscribed, causes the configured\n   * `DELETE` request to execute on the server. See the individual overloads for\n   * details on the return type.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: HttpObserve,\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  } = {}): Observable<any> {\n    return this.request<any>('DELETE', url, options as any);\n  }\n\n\n  /**\n   * Constructs a `GET` request that interprets the body as an `ArrayBuffer` and returns the\n   * response in an `ArrayBuffer`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body as an `ArrayBuffer`.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<ArrayBuffer>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a `Blob`\n   * and returns the response as a `Blob`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body as a `Blob`.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<Blob>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a text string\n   * and returns the response as a string value.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body of type string.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<string>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as an `ArrayBuffer` and returns\n   *  the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all `HttpEvents` for the request, with the response\n   * body as an `ArrayBuffer`.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<ArrayBuffer>>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a `Blob` and\n   * returns the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body as a `Blob`.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Blob>>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a text string and returns\n   * the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body of type string.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<string>>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a JSON object\n   * and returns the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body of type `Object`.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Object>>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a JSON object and returns the full event\n   * stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with a response body in the requested type.\n   */\n  get<T>(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<T>>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as an `ArrayBuffer` and\n   * returns the full `HTTPResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HTTPResponse` for the request,\n   * with the response body as an `ArrayBuffer`.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<ArrayBuffer>>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a `Blob` and\n   * returns the full `HTTPResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HTTPResponse` for the request,\n   *  with the response body as a `Blob`.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Blob>>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a text stream and\n   * returns the full `HTTPResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HTTPResponse` for the request,\n   * with the response body of type string.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<string>>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a JSON object and\n   * returns the full `HTTPResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the full `HttpResponse`,\n   * with the response body of type `Object`.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Object>>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a JSON object and\n   * returns the full `HTTPResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the full `HTTPResponse` for the request,\n   * with a response body in the requested type.\n   */\n  get<T>(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<T>>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a JSON object and\n   * returns the response body as a JSON object.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   *\n   * @return An `Observable` of the response body as a JSON object.\n   */\n  get(url: string, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<Object>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a JSON object and returns\n   * the response body in a given type.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HTTPResponse`, with a response body in the requested type.\n   */\n  get<T>(url: string, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<T>;\n\n  /**\n   * Constructs an observable that, when subscribed, causes the configured\n   * `GET` request to execute on the server. See the individual overloads for\n   * details on the return type.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: HttpObserve,\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  } = {}): Observable<any> {\n    return this.request<any>('GET', url, options as any);\n  }\n\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as an `ArrayBuffer` and\n   * returns the response as an `ArrayBuffer`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body as an `ArrayBuffer`.\n   */\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<ArrayBuffer>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as a `Blob` and returns\n   * the response as a `Blob`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return  An `Observable` of the response, with the response body as a `Blob`.\n   */\n\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<Blob>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as a text string and returns the response\n   * as a string value.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body of type string.\n   */\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<string>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as an  `ArrayBuffer`\n   *  and returns the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of tall `HttpEvents` for the request,\n   * with the response body as an `ArrayBuffer`.\n   */\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<ArrayBuffer>>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as a `Blob` and\n   * returns the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all `HttpEvents` for the request,\n   * with the response body as a `Blob`.\n   */\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Blob>>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as a text string\n   * and returns the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all HttpEvents for the request, with the response body of type\n   *     string.\n   */\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<string>>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as a JSON object\n   * and returns the full HTTP event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all `HTTPEvents` for the request, with a response body of\n   * type `Object`.\n   */\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Object>>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as a JSON object and\n   * returns the full event stream.\n   *\n   * @return An `Observable` of all the `HTTPEvents` for the request\n   * , with a response body in the requested type.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   */\n  head<T>(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<T>>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as an `ArrayBuffer`\n   *  and returns the full HTTP response.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HTTPResponse` for the request,\n   * with the response body as an `ArrayBuffer`.\n   */\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<ArrayBuffer>>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as a `Blob` and returns\n   * the full `HTTPResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HTTPResponse` for the request,\n   * with the response body as a blob.\n   */\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Blob>>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as text stream\n   * and returns the full `HTTPResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HTTPResponse` for the request,\n   * with the response body of type string.\n   */\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<string>>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as a JSON object and\n   * returns the full `HTTPResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HTTPResponse` for the request,\n   * with the response body of type `Object`.\n   */\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Object>>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as a JSON object\n   * and returns the full `HTTPResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HTTPResponse` for the request,\n   * with a responmse body of the requested type.\n   */\n  head<T>(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<T>>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as a JSON object and\n   * returns the response body as a JSON object.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body as a JSON object.\n   */\n  head(url: string, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<Object>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as a JSON object and returns\n   * the response in a given type.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HTTPResponse` for the request,\n   * with a response body of the given type.\n   */\n  head<T>(url: string, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<T>;\n\n  /**\n   * Constructs an observable that, when subscribed, causes the configured\n   * `HEAD` request to execute on the server. The `HEAD` method returns\n   * meta information about the resource without transferring the\n   * resource itself. See the individual overloads for\n   * details on the return type.\n   */\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: HttpObserve,\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  } = {}): Observable<any> {\n    return this.request<any>('HEAD', url, options as any);\n  }\n\n  /**\n   * Constructs a `JSONP` request for the given URL and name of the callback parameter.\n   *\n   * @param url The resource URL.\n   * @param callbackParam The callback function name.\n   *\n   * @return An `Observable` of the response object, with response body as an object.\n   */\n  jsonp(url: string, callbackParam: string): Observable<Object>;\n\n  /**\n   * Constructs a `JSONP` request for the given URL and name of the callback parameter.\n   *\n   * @param url The resource URL.\n   * @param callbackParam The callback function name.\n   *\n   * You must install a suitable interceptor, such as one provided by `HttpClientJsonpModule`.\n   * If no such interceptor is reached,\n   * then the `JSONP` request can be rejected by the configured backend.\n   *\n   * @return An `Observable` of the response object, with response body in the requested type.\n   */\n  jsonp<T>(url: string, callbackParam: string): Observable<T>;\n\n  /**\n   * Constructs an `Observable` that, when subscribed, causes a request with the special method\n   * `JSONP` to be dispatched via the interceptor pipeline.\n   * The [JSONP pattern](https://en.wikipedia.org/wiki/JSONP) works around limitations of certain\n   * API endpoints that don't support newer,\n   * and preferable [CORS](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS) protocol.\n   * JSONP treats the endpoint API as a JavaScript file and tricks the browser to process the\n   * requests even if the API endpoint is not located on the same domain (origin) as the client-side\n   * application making the request.\n   * The endpoint API must support JSONP callback for JSONP requests to work.\n   * The resource API returns the JSON response wrapped in a callback function.\n   * You can pass the callback function name as one of the query parameters.\n   * Note that JSONP requests can only be used with `GET` requests.\n   *\n   * @param url The resource URL.\n   * @param callbackParam The callback function name.\n   *\n   */\n  jsonp<T>(url: string, callbackParam: string): Observable<T> {\n    return this.request<any>('JSONP', url, {\n      params: new HttpParams().append(callbackParam, 'JSONP_CALLBACK'),\n      observe: 'body',\n      responseType: 'json',\n    });\n  }\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as an\n   * `ArrayBuffer` and returns the response as an `ArrayBuffer`.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the response, with the response body as an `ArrayBuffer`.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<ArrayBuffer>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as a `Blob` and returns\n   * the response as a `Blob`.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the response, with the response body as a `Blob`.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<Blob>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as a text string and\n   * returns a string value.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the response, with the response body of type string.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<string>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as an `ArrayBuffer`\n   *  and returns the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return  An `Observable` of all `HttpEvents` for the request,\n   * with the response body as an `ArrayBuffer`.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<ArrayBuffer>>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as a `Blob` and\n   * returns the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of all `HttpEvents` for the request,\n   * with the response body as a `Blob`.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Blob>>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as a text string\n   * and returns the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of all the `HTTPEvents` for the request,\n   * with the response body of type string.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<string>>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as a JSON object\n   * and returns the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of all the `HttpEvents` for the request with the response\n   * body of type `Object`.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Object>>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as a JSON object and\n   * returns the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of all the `HttpEvents` for the request,\n   * with a response body in the requested type.\n   */\n  options<T>(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<T>>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as an `ArrayBuffer`\n   *  and returns the full HTTP response.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with the response body as an `ArrayBuffer`.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<ArrayBuffer>>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as a `Blob`\n   *  and returns the full `HTTPResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   *  with the response body as a `Blob`.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Blob>>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as text stream\n   * and returns the full `HTTPResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   *  with the response body of type string.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<string>>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as a JSON object\n   * and returns the full `HTTPResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with the response body of type `Object`.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Object>>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as a JSON object and\n   * returns the full `HTTPResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with a response body in the requested type.\n   */\n  options<T>(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<T>>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as a JSON object and returns the\n   * response body as a JSON object.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the response, with the response body as a JSON object.\n   */\n  options(url: string, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<Object>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as a JSON object and returns the\n   * response in a given type.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the `HTTPResponse`, with a response body of the given type.\n   */\n  options<T>(url: string, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<T>;\n\n  /**\n   * Constructs an `Observable` that, when subscribed, causes the configured\n   * `OPTIONS` request to execute on the server. This method allows the client\n   * to determine the supported HTTP methods and other capabilites of an endpoint,\n   * without implying a resource action. See the individual overloads for\n   * details on the return type.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: HttpObserve,\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  } = {}): Observable<any> {\n    return this.request<any>('OPTIONS', url, options as any);\n  }\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as an `ArrayBuffer` and returns\n   * the response as an `ArrayBuffer`.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the response, with the response body as an `ArrayBuffer`.\n   */\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<ArrayBuffer>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a `Blob` and returns the response\n   * as a `Blob`.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the response, with the response body as a `Blob`.\n   */\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<Blob>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a text string and\n   * returns the response as a string value.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the response, with a response body of type string.\n   */\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<string>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as an `ArrayBuffer` and\n   *  returns the the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of all the `HTTPevents` for the request,\n   * with the response body as an `ArrayBuffer`.\n   */\n\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<ArrayBuffer>>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a `Blob`\n   *  and returns the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of all the `HTTPevents` for the request, with the\n   * response body as `Blob`.\n   */\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Blob>>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a text string and\n   * returns the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of all the `HTTPevents`for the request, with a\n   * response body of type string.\n   */\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<string>>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a JSON object\n   * and returns the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of all the `HTTPevents` for the request,\n   * with a response body of type `Object`.\n   */\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Object>>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a JSON object\n   * and returns the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of all the `HTTPevents` for the request,\n   *  with a response body in the requested type.\n   */\n  patch<T>(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<T>>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as an `ArrayBuffer`\n   *  and returns the full `HTTPResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return  An `Observable` of the `HttpResponse` for the request,\n   *  with the response body as an `ArrayBuffer`.\n   */\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<ArrayBuffer>>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a `Blob` and returns the full\n   * `HTTPResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return  An `Observable` of the `HttpResponse` for the request,\n   * with the response body as a `Blob`.\n   */\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Blob>>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a text stream and returns the\n   * full `HTTPResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return  An `Observable` of the `HttpResponse` for the request,\n   * with a response body of type string.\n   */\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<string>>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a JSON object\n   * and returns the full `HTTPResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with a response body in the requested type.\n   */\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Object>>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a JSON object\n   * and returns the full `HTTPResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with a response body in the given type.\n   */\n  patch<T>(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<T>>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a JSON object and\n   * returns the response body as a JSON object.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the response, with the response body as a JSON object.\n   */\n  patch(url: string, body: any|null, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<Object>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a JSON object\n   * and returns the response in a given type.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return  An `Observable` of the `HttpResponse` for the request,\n   * with a response body in the given type.\n   */\n  patch<T>(url: string, body: any|null, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<T>;\n\n  /**\n   * Constructs an observable that, when subscribed, causes the configured\n   * `PATCH` request to execute on the server. See the individual overloads for\n   * details on the return type.\n   */\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: HttpObserve,\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  } = {}): Observable<any> {\n    return this.request<any>('PATCH', url, addBody(options, body));\n  }\n\n  /**\n   * Constructs a `POST` request that interprets the body as an `ArrayBuffer` and returns\n   * an `ArrayBuffer`.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the response, with the response body as an `ArrayBuffer`.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<ArrayBuffer>;\n\n  /**\n   * Constructs a `POST` request that interprets the body as a `Blob` and returns the\n   * response as a `Blob`.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the response, with the response body as a `Blob`.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<Blob>;\n\n  /**\n   * Constructs a `POST` request that interprets the body as a text string and\n   * returns the response as a string value.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the response, with a response body of type string.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<string>;\n\n  /**\n   * Constructs a `POST` request that interprets the body as an `ArrayBuffer` and\n   * returns the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of all `HttpEvents` for the request,\n   * with the response body as an `ArrayBuffer`.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<ArrayBuffer>>;\n\n  /**\n   * Constructs a `POST` request that interprets the body as a `Blob`\n   * and returns the response in an observable of the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of all `HttpEvents` for the request, with the response body as `Blob`.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Blob>>;\n\n  /**\n   * Constructs a `POST` request that interprets the body as a text string and returns the full\n   * event stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return  An `Observable` of all `HttpEvents` for the request,\n   * with a response body of type string.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<string>>;\n\n  /**\n   * Constructs a POST request that interprets the body as a JSON object and returns the full event\n   * stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return  An `Observable` of all `HttpEvents` for the request,\n   * with a response body of type `Object`.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Object>>;\n\n  /**\n   * Constructs a POST request that interprets the body as a JSON object and returns the full event\n   * stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of all `HttpEvents` for the request,\n   * with a response body in the requested type.\n   */\n  post<T>(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<T>>;\n\n  /**\n   * Constructs a POST request that interprets the body as an `ArrayBuffer`\n   *  and returns the full `HTTPresponse`.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return  An `Observable` of the `HTTPResponse` for the request, with the response body as an\n   *     `ArrayBuffer`.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<ArrayBuffer>>;\n\n  /**\n   * Constructs a `POST` request that interprets the body as a `Blob` and returns the full\n   * `HTTPResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the `HTTPResponse` for the request,\n   * with the response body as a `Blob`.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Blob>>;\n\n  /**\n   * Constructs a `POST` request that interprets the body as a text stream and returns\n   * the full `HTTPResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return  An `Observable` of the `HTTPResponse` for the request,\n   * with a response body of type string.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<string>>;\n\n  /**\n   * Constructs a `POST` request that interprets the body as a JSON object\n   * and returns the full `HTTPResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the `HTTPResponse` for the request, with a response body of type\n   * `Object`.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Object>>;\n\n  /**\n   * Constructs a `POST` request that interprets the body as a JSON object and returns the full\n   * `HTTPResponse`.\n   *\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the `HTTPResponse` for the request, with a response body in the\n   *     requested type.\n   */\n  post<T>(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<T>>;\n\n  /**\n   * Constructs a `POST` request that interprets the body as a\n   * JSON object and returns the response body as a JSON object.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the response, with the response body as a JSON object.\n   */\n  post(url: string, body: any|null, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<Object>;\n\n  /**\n   * Constructs a `POST` request that interprets the body as a JSON object\n   * and returns an observable of the response.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return  An `Observable` of the `HTTPResponse` for the request, with a response body in the\n   *     requested type.\n   */\n  post<T>(url: string, body: any|null, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<T>;\n\n  /**\n   * Constructs an observable that, when subscribed, causes the configured\n   * `POST` request to execute on the server. The server responds with the location of\n   * the replaced resource. See the individual overloads for\n   * details on the return type.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: HttpObserve,\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  } = {}): Observable<any> {\n    return this.request<any>('POST', url, addBody(options, body));\n  }\n\n  /**\n   * Constructs a `PUT` request that interprets the body as an `ArrayBuffer` and returns the\n   * response as an `ArrayBuffer`.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the response, with the response body as an `ArrayBuffer`.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<ArrayBuffer>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as a `Blob` and returns\n   * the response as a `Blob`.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the response, with the response body as a `Blob`.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<Blob>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as a text string and\n   * returns the response as a string value.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the response, with a response body of type string.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<string>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as an `ArrayBuffer` and\n   * returns the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of all `HttpEvents` for the request,\n   * with the response body as an `ArrayBuffer`.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<ArrayBuffer>>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as a `Blob` and returns the full event\n   * stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of all `HttpEvents` for the request,\n   * with the response body as a `Blob`.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Blob>>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as a text string and returns the full event\n   * stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of all HttpEvents for the request, with a response body\n   * of type string.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<string>>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as a JSON object and returns the full event\n   * stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of all `HttpEvents` for the request, with a response body of\n   * type `Object`.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Object>>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as a JSON object and returns the\n   * full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of all `HttpEvents` for the request,\n   * with a response body in the requested type.\n   */\n  put<T>(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<T>>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as an\n   * `ArrayBuffer` and returns an observable of the full HTTP response.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the `HTTPResponse` for the request, with the response body as an\n   *     `ArrayBuffer`.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<ArrayBuffer>>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as a `Blob` and returns the\n   * full HTTP response.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the `HTTPResponse` for the request,\n   * with the response body as a `Blob`.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Blob>>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as a text stream and returns the\n   * full HTTP response.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the `HTTPResponse` for the request, with a response body of type\n   *     string.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<string>>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as a JSON object and returns the full HTTP\n   * response.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the `HTTPResponse` for the request, with a response body\n   * of type 'Object`.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Object>>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as a JSON object and returns the full HTTP\n   * response.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the `HTTPResponse` for the request,\n   * with a response body in the requested type.\n   */\n  put<T>(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<T>>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as a JSON object and returns the response\n   * body as a JSON object.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the response, with the response body as a JSON object.\n   */\n  put(url: string, body: any|null, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<Object>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as a JSON object\n   * and returns an observable of the response.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the `HTTPResponse` for the request, with a response body in the\n   *     requested type.\n   */\n  put<T>(url: string, body: any|null, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<T>;\n\n  /**\n   * Constructs an observable that, when subscribed, causes the configured\n   * `PUT` request to execute on the server. The `PUT` method replaces an existing resource\n   * with a new set of values.\n   * See the individual overloads for details on the return type.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: HttpObserve,\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  } = {}): Observable<any> {\n    return this.request<any>('PUT', url, addBody(options, body));\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable, InjectionToken} from '@angular/core';\nimport {Observable} from 'rxjs';\n\nimport {HttpHandler} from './backend';\nimport {HttpRequest} from './request';\nimport {HttpEvent} from './response';\n\n/**\n * Intercepts and handles an `HttpRequest` or `HttpResponse`.\n *\n * Most interceptors transform the outgoing request before passing it to the\n * next interceptor in the chain, by calling `next.handle(transformedReq)`.\n * An interceptor may transform the\n * response event stream as well, by applying additional RxJS operators on the stream\n * returned by `next.handle()`.\n *\n * More rarely, an interceptor may handle the request entirely,\n * and compose a new event stream instead of invoking `next.handle()`. This is an\n * acceptable behavior, but keep in mind that further interceptors will be skipped entirely.\n *\n * It is also rare but valid for an interceptor to return multiple responses on the\n * event stream for a single request.\n *\n * @publicApi\n *\n * @see [HTTP Guide](guide/http#intercepting-requests-and-responses)\n *\n * @usageNotes\n *\n * To use the same instance of `HttpInterceptors` for the entire app, import the `HttpClientModule`\n * only in your `AppModule`, and add the interceptors to the root application injector .\n * If you import `HttpClientModule` multiple times across different modules (for example, in lazy\n * loading modules), each import creates a new copy of the `HttpClientModule`, which overwrites the\n * interceptors provided in the root module.\n *\n */\nexport interface HttpInterceptor {\n  /**\n   * Identifies and handles a given HTTP request.\n   * @param req The outgoing request object to handle.\n   * @param next The next interceptor in the chain, or the backend\n   * if no interceptors remain in the chain.\n   * @returns An observable of the event stream.\n   */\n  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>>;\n}\n\n/**\n * `HttpHandler` which applies an `HttpInterceptor` to an `HttpRequest`.\n *\n *\n */\nexport class HttpInterceptorHandler implements HttpHandler {\n  constructor(private next: HttpHandler, private interceptor: HttpInterceptor) {}\n\n  handle(req: HttpRequest<any>): Observable<HttpEvent<any>> {\n    return this.interceptor.intercept(req, this.next);\n  }\n}\n\n/**\n * A multi-provider token that represents the array of registered\n * `HttpInterceptor` objects.\n *\n * @publicApi\n */\nexport const HTTP_INTERCEPTORS = new InjectionToken<HttpInterceptor[]>('HTTP_INTERCEPTORS');\n\n@Injectable()\nexport class NoopInterceptor implements HttpInterceptor {\n  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {\n    return next.handle(req);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT} from '@angular/common';\nimport {Inject, Injectable} from '@angular/core';\nimport {Observable, Observer} from 'rxjs';\n\nimport {HttpBackend, HttpHandler} from './backend';\nimport {HttpRequest} from './request';\nimport {HttpErrorResponse, HttpEvent, HttpEventType, HttpResponse} from './response';\n\n// Every request made through JSONP needs a callback name that's unique across the\n// whole page. Each request is assigned an id and the callback name is constructed\n// from that. The next id to be assigned is tracked in a global variable here that\n// is shared among all applications on the page.\nlet nextRequestId: number = 0;\n\n// Error text given when a JSONP script is injected, but doesn't invoke the callback\n// passed in its URL.\nexport const JSONP_ERR_NO_CALLBACK = 'JSONP injected script did not invoke callback.';\n\n// Error text given when a request is passed to the JsonpClientBackend that doesn't\n// have a request method JSONP.\nexport const JSONP_ERR_WRONG_METHOD = 'JSONP requests must use JSONP request method.';\nexport const JSONP_ERR_WRONG_RESPONSE_TYPE = 'JSONP requests must use Json response type.';\n\n/**\n * DI token/abstract type representing a map of JSONP callbacks.\n *\n * In the browser, this should always be the `window` object.\n *\n *\n */\nexport abstract class JsonpCallbackContext {\n  [key: string]: (data: any) => void;\n}\n\n/**\n * Processes an `HttpRequest` with the JSONP method,\n * by performing JSONP style requests.\n * @see `HttpHandler`\n * @see `HttpXhrBackend`\n *\n * @publicApi\n */\n@Injectable()\nexport class JsonpClientBackend implements HttpBackend {\n  constructor(private callbackMap: JsonpCallbackContext, @Inject(DOCUMENT) private document: any) {}\n\n  /**\n   * Get the name of the next callback method, by incrementing the global `nextRequestId`.\n   */\n  private nextCallback(): string {\n    return `ng_jsonp_callback_${nextRequestId++}`;\n  }\n\n  /**\n   * Processes a JSONP request and returns an event stream of the results.\n   * @param req The request object.\n   * @returns An observable of the response events.\n   *\n   */\n  handle(req: HttpRequest<never>): Observable<HttpEvent<any>> {\n    // Firstly, check both the method and response type. If either doesn't match\n    // then the request was improperly routed here and cannot be handled.\n    if (req.method !== 'JSONP') {\n      throw new Error(JSONP_ERR_WRONG_METHOD);\n    } else if (req.responseType !== 'json') {\n      throw new Error(JSONP_ERR_WRONG_RESPONSE_TYPE);\n    }\n\n    // Everything else happens inside the Observable boundary.\n    return new Observable<HttpEvent<any>>((observer: Observer<HttpEvent<any>>) => {\n      // The first step to make a request is to generate the callback name, and replace the\n      // callback placeholder in the URL with the name. Care has to be taken here to ensure\n      // a trailing &, if matched, gets inserted back into the URL in the correct place.\n      const callback = this.nextCallback();\n      const url = req.urlWithParams.replace(/=JSONP_CALLBACK(&|$)/, `=${callback}$1`);\n\n      // Construct the <script> tag and point it at the URL.\n      const node = this.document.createElement('script');\n      node.src = url;\n\n      // A JSONP request requires waiting for multiple callbacks. These variables\n      // are closed over and track state across those callbacks.\n\n      // The response object, if one has been received, or null otherwise.\n      let body: any|null = null;\n\n      // Whether the response callback has been called.\n      let finished: boolean = false;\n\n      // Whether the request has been cancelled (and thus any other callbacks)\n      // should be ignored.\n      let cancelled: boolean = false;\n\n      // Set the response callback in this.callbackMap (which will be the window\n      // object in the browser. The script being loaded via the <script> tag will\n      // eventually call this callback.\n      this.callbackMap[callback] = (data?: any) => {\n        // Data has been received from the JSONP script. Firstly, delete this callback.\n        delete this.callbackMap[callback];\n\n        // Next, make sure the request wasn't cancelled in the meantime.\n        if (cancelled) {\n          return;\n        }\n\n        // Set state to indicate data was received.\n        body = data;\n        finished = true;\n      };\n\n      // cleanup() is a utility closure that removes the <script> from the page and\n      // the response callback from the window. This logic is used in both the\n      // success, error, and cancellation paths, so it's extracted out for convenience.\n      const cleanup = () => {\n        // Remove the <script> tag if it's still on the page.\n        if (node.parentNode) {\n          node.parentNode.removeChild(node);\n        }\n\n        // Remove the response callback from the callbackMap (window object in the\n        // browser).\n        delete this.callbackMap[callback];\n      };\n\n      // onLoad() is the success callback which runs after the response callback\n      // if the JSONP script loads successfully. The event itself is unimportant.\n      // If something went wrong, onLoad() may run without the response callback\n      // having been invoked.\n      const onLoad = (event: Event) => {\n        // Do nothing if the request has been cancelled.\n        if (cancelled) {\n          return;\n        }\n\n        // Cleanup the page.\n        cleanup();\n\n        // Check whether the response callback has run.\n        if (!finished) {\n          // It hasn't, something went wrong with the request. Return an error via\n          // the Observable error path. All JSONP errors have status 0.\n          observer.error(new HttpErrorResponse({\n            url,\n            status: 0,\n            statusText: 'JSONP Error',\n            error: new Error(JSONP_ERR_NO_CALLBACK),\n          }));\n          return;\n        }\n\n        // Success. body either contains the response body or null if none was\n        // returned.\n        observer.next(new HttpResponse({\n          body,\n          status: 200,\n          statusText: 'OK',\n          url,\n        }));\n\n        // Complete the stream, the response is over.\n        observer.complete();\n      };\n\n      // onError() is the error callback, which runs if the script returned generates\n      // a Javascript error. It emits the error via the Observable error channel as\n      // a HttpErrorResponse.\n      const onError: any = (error: Error) => {\n        // If the request was already cancelled, no need to emit anything.\n        if (cancelled) {\n          return;\n        }\n        cleanup();\n\n        // Wrap the error in a HttpErrorResponse.\n        observer.error(new HttpErrorResponse({\n          error,\n          status: 0,\n          statusText: 'JSONP Error',\n          url,\n        }));\n      };\n\n      // Subscribe to both the success (load) and error events on the <script> tag,\n      // and add it to the page.\n      node.addEventListener('load', onLoad);\n      node.addEventListener('error', onError);\n      this.document.body.appendChild(node);\n\n      // The request has now been successfully sent.\n      observer.next({type: HttpEventType.Sent});\n\n      // Cancellation handler.\n      return () => {\n        // Track the cancellation so event listeners won't do anything even if already scheduled.\n        cancelled = true;\n\n        // Remove the event listeners so they won't run if the events later fire.\n        node.removeEventListener('load', onLoad);\n        node.removeEventListener('error', onError);\n\n        // And finally, clean up the page.\n        cleanup();\n      };\n    });\n  }\n}\n\n/**\n * Identifies requests with the method JSONP and\n * shifts them to the `JsonpClientBackend`.\n *\n * @see `HttpInterceptor`\n *\n * @publicApi\n */\n@Injectable()\nexport class JsonpInterceptor {\n  constructor(private jsonp: JsonpClientBackend) {}\n\n  /**\n   * Identifies and handles a given JSONP request.\n   * @param req The outgoing request object to handle.\n   * @param next The next interceptor in the chain, or the backend\n   * if no interceptors remain in the chain.\n   * @returns An observable of the event stream.\n   */\n  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {\n    if (req.method === 'JSONP') {\n      return this.jsonp.handle(req as HttpRequest<never>);\n    }\n    // Fall through for normal HTTP requests.\n    return next.handle(req);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable} from '@angular/core';\nimport {Observable, Observer} from 'rxjs';\n\nimport {HttpBackend} from './backend';\nimport {HttpHeaders} from './headers';\nimport {HttpRequest} from './request';\nimport {HttpDownloadProgressEvent, HttpErrorResponse, HttpEvent, HttpEventType, HttpHeaderResponse, HttpJsonParseError, HttpResponse, HttpUploadProgressEvent} from './response';\n\nconst XSSI_PREFIX = /^\\)\\]\\}',?\\n/;\n\n/**\n * Determine an appropriate URL for the response, by checking either\n * XMLHttpRequest.responseURL or the X-Request-URL header.\n */\nfunction getResponseUrl(xhr: any): string|null {\n  if ('responseURL' in xhr && xhr.responseURL) {\n    return xhr.responseURL;\n  }\n  if (/^X-Request-URL:/m.test(xhr.getAllResponseHeaders())) {\n    return xhr.getResponseHeader('X-Request-URL');\n  }\n  return null;\n}\n\n/**\n * A wrapper around the `XMLHttpRequest` constructor.\n *\n * @publicApi\n */\nexport abstract class XhrFactory {\n  abstract build(): XMLHttpRequest;\n}\n\n/**\n * A factory for `HttpXhrBackend` that uses the `XMLHttpRequest` browser API.\n *\n */\n@Injectable()\nexport class BrowserXhr implements XhrFactory {\n  constructor() {}\n  build(): any {\n    return <any>(new XMLHttpRequest());\n  }\n}\n\n/**\n * Tracks a response from the server that does not yet have a body.\n */\ninterface PartialResponse {\n  headers: HttpHeaders;\n  status: number;\n  statusText: string;\n  url: string;\n}\n\n/**\n * Uses `XMLHttpRequest` to send requests to a backend server.\n * @see `HttpHandler`\n * @see `JsonpClientBackend`\n *\n * @publicApi\n */\n@Injectable()\nexport class HttpXhrBackend implements HttpBackend {\n  constructor(private xhrFactory: XhrFactory) {}\n\n  /**\n   * Processes a request and returns a stream of response events.\n   * @param req The request object.\n   * @returns An observable of the response events.\n   */\n  handle(req: HttpRequest<any>): Observable<HttpEvent<any>> {\n    // Quick check to give a better error message when a user attempts to use\n    // HttpClient.jsonp() without installing the HttpClientJsonpModule\n    if (req.method === 'JSONP') {\n      throw new Error(\n          `Attempted to construct Jsonp request without HttpClientJsonpModule installed.`);\n    }\n\n    // Everything happens on Observable subscription.\n    return new Observable((observer: Observer<HttpEvent<any>>) => {\n      // Start by setting up the XHR object with request method, URL, and withCredentials flag.\n      const xhr = this.xhrFactory.build();\n      xhr.open(req.method, req.urlWithParams);\n      if (!!req.withCredentials) {\n        xhr.withCredentials = true;\n      }\n\n      // Add all the requested headers.\n      req.headers.forEach((name, values) => xhr.setRequestHeader(name, values.join(',')));\n\n      // Add an Accept header if one isn't present already.\n      if (!req.headers.has('Accept')) {\n        xhr.setRequestHeader('Accept', 'application/json, text/plain, */*');\n      }\n\n      // Auto-detect the Content-Type header if one isn't present already.\n      if (!req.headers.has('Content-Type')) {\n        const detectedType = req.detectContentTypeHeader();\n        // Sometimes Content-Type detection fails.\n        if (detectedType !== null) {\n          xhr.setRequestHeader('Content-Type', detectedType);\n        }\n      }\n\n      // Set the responseType if one was requested.\n      if (req.responseType) {\n        const responseType = req.responseType.toLowerCase();\n\n        // JSON responses need to be processed as text. This is because if the server\n        // returns an XSSI-prefixed JSON response, the browser will fail to parse it,\n        // xhr.response will be null, and xhr.responseText cannot be accessed to\n        // retrieve the prefixed JSON data in order to strip the prefix. Thus, all JSON\n        // is parsed by first requesting text and then applying JSON.parse.\n        xhr.responseType = ((responseType !== 'json') ? responseType : 'text') as any;\n      }\n\n      // Serialize the request body if one is present. If not, this will be set to null.\n      const reqBody = req.serializeBody();\n\n      // If progress events are enabled, response headers will be delivered\n      // in two events - the HttpHeaderResponse event and the full HttpResponse\n      // event. However, since response headers don't change in between these\n      // two events, it doesn't make sense to parse them twice. So headerResponse\n      // caches the data extracted from the response whenever it's first parsed,\n      // to ensure parsing isn't duplicated.\n      let headerResponse: HttpHeaderResponse|null = null;\n\n      // partialFromXhr extracts the HttpHeaderResponse from the current XMLHttpRequest\n      // state, and memoizes it into headerResponse.\n      const partialFromXhr = (): HttpHeaderResponse => {\n        if (headerResponse !== null) {\n          return headerResponse;\n        }\n\n        // Read status and normalize an IE9 bug (http://bugs.jquery.com/ticket/1450).\n        const status: number = xhr.status === 1223 ? 204 : xhr.status;\n        const statusText = xhr.statusText || 'OK';\n\n        // Parse headers from XMLHttpRequest - this step is lazy.\n        const headers = new HttpHeaders(xhr.getAllResponseHeaders());\n\n        // Read the response URL from the XMLHttpResponse instance and fall back on the\n        // request URL.\n        const url = getResponseUrl(xhr) || req.url;\n\n        // Construct the HttpHeaderResponse and memoize it.\n        headerResponse = new HttpHeaderResponse({headers, status, statusText, url});\n        return headerResponse;\n      };\n\n      // Next, a few closures are defined for the various events which XMLHttpRequest can\n      // emit. This allows them to be unregistered as event listeners later.\n\n      // First up is the load event, which represents a response being fully available.\n      const onLoad = () => {\n        // Read response state from the memoized partial data.\n        let {headers, status, statusText, url} = partialFromXhr();\n\n        // The body will be read out if present.\n        let body: any|null = null;\n\n        if (status !== 204) {\n          // Use XMLHttpRequest.response if set, responseText otherwise.\n          body = (typeof xhr.response === 'undefined') ? xhr.responseText : xhr.response;\n        }\n\n        // Normalize another potential bug (this one comes from CORS).\n        if (status === 0) {\n          status = !!body ? 200 : 0;\n        }\n\n        // ok determines whether the response will be transmitted on the event or\n        // error channel. Unsuccessful status codes (not 2xx) will always be errors,\n        // but a successful status code can still result in an error if the user\n        // asked for JSON data and the body cannot be parsed as such.\n        let ok = status >= 200 && status < 300;\n\n        // Check whether the body needs to be parsed as JSON (in many cases the browser\n        // will have done that already).\n        if (req.responseType === 'json' && typeof body === 'string') {\n          // Save the original body, before attempting XSSI prefix stripping.\n          const originalBody = body;\n          body = body.replace(XSSI_PREFIX, '');\n          try {\n            // Attempt the parse. If it fails, a parse error should be delivered to the user.\n            body = body !== '' ? JSON.parse(body) : null;\n          } catch (error) {\n            // Since the JSON.parse failed, it's reasonable to assume this might not have been a\n            // JSON response. Restore the original body (including any XSSI prefix) to deliver\n            // a better error response.\n            body = originalBody;\n\n            // If this was an error request to begin with, leave it as a string, it probably\n            // just isn't JSON. Otherwise, deliver the parsing error to the user.\n            if (ok) {\n              // Even though the response status was 2xx, this is still an error.\n              ok = false;\n              // The parse error contains the text of the body that failed to parse.\n              body = {error, text: body} as HttpJsonParseError;\n            }\n          }\n        }\n\n        if (ok) {\n          // A successful response is delivered on the event stream.\n          observer.next(new HttpResponse({\n            body,\n            headers,\n            status,\n            statusText,\n            url: url || undefined,\n          }));\n          // The full body has been received and delivered, no further events\n          // are possible. This request is complete.\n          observer.complete();\n        } else {\n          // An unsuccessful request is delivered on the error channel.\n          observer.error(new HttpErrorResponse({\n            // The error in this case is the response body (error from the server).\n            error: body,\n            headers,\n            status,\n            statusText,\n            url: url || undefined,\n          }));\n        }\n      };\n\n      // The onError callback is called when something goes wrong at the network level.\n      // Connection timeout, DNS error, offline, etc. These are actual errors, and are\n      // transmitted on the error channel.\n      const onError = (error: ProgressEvent) => {\n        const {url} = partialFromXhr();\n        const res = new HttpErrorResponse({\n          error,\n          status: xhr.status || 0,\n          statusText: xhr.statusText || 'Unknown Error',\n          url: url || undefined,\n        });\n        observer.error(res);\n      };\n\n      // The sentHeaders flag tracks whether the HttpResponseHeaders event\n      // has been sent on the stream. This is necessary to track if progress\n      // is enabled since the event will be sent on only the first download\n      // progerss event.\n      let sentHeaders = false;\n\n      // The download progress event handler, which is only registered if\n      // progress events are enabled.\n      const onDownProgress = (event: ProgressEvent) => {\n        // Send the HttpResponseHeaders event if it hasn't been sent already.\n        if (!sentHeaders) {\n          observer.next(partialFromXhr());\n          sentHeaders = true;\n        }\n\n        // Start building the download progress event to deliver on the response\n        // event stream.\n        let progressEvent: HttpDownloadProgressEvent = {\n          type: HttpEventType.DownloadProgress,\n          loaded: event.loaded,\n        };\n\n        // Set the total number of bytes in the event if it's available.\n        if (event.lengthComputable) {\n          progressEvent.total = event.total;\n        }\n\n        // If the request was for text content and a partial response is\n        // available on XMLHttpRequest, include it in the progress event\n        // to allow for streaming reads.\n        if (req.responseType === 'text' && !!xhr.responseText) {\n          progressEvent.partialText = xhr.responseText;\n        }\n\n        // Finally, fire the event.\n        observer.next(progressEvent);\n      };\n\n      // The upload progress event handler, which is only registered if\n      // progress events are enabled.\n      const onUpProgress = (event: ProgressEvent) => {\n        // Upload progress events are simpler. Begin building the progress\n        // event.\n        let progress: HttpUploadProgressEvent = {\n          type: HttpEventType.UploadProgress,\n          loaded: event.loaded,\n        };\n\n        // If the total number of bytes being uploaded is available, include\n        // it.\n        if (event.lengthComputable) {\n          progress.total = event.total;\n        }\n\n        // Send the event.\n        observer.next(progress);\n      };\n\n      // By default, register for load and error events.\n      xhr.addEventListener('load', onLoad);\n      xhr.addEventListener('error', onError);\n\n      // Progress events are only enabled if requested.\n      if (req.reportProgress) {\n        // Download progress is always enabled if requested.\n        xhr.addEventListener('progress', onDownProgress);\n\n        // Upload progress depends on whether there is a body to upload.\n        if (reqBody !== null && xhr.upload) {\n          xhr.upload.addEventListener('progress', onUpProgress);\n        }\n      }\n\n      // Fire the request, and notify the event stream that it was fired.\n      xhr.send(reqBody!);\n      observer.next({type: HttpEventType.Sent});\n\n      // This is the return from the Observable function, which is the\n      // request cancellation handler.\n      return () => {\n        // On a cancellation, remove all registered event listeners.\n        xhr.removeEventListener('error', onError);\n        xhr.removeEventListener('load', onLoad);\n        if (req.reportProgress) {\n          xhr.removeEventListener('progress', onDownProgress);\n          if (reqBody !== null && xhr.upload) {\n            xhr.upload.removeEventListener('progress', onUpProgress);\n          }\n        }\n\n        // Finally, abort the in-flight request.\n        if (xhr.readyState !== xhr.DONE) {\n          xhr.abort();\n        }\n      };\n    });\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT, ɵparseCookieValue as parseCookieValue} from '@angular/common';\nimport {Inject, Injectable, InjectionToken, PLATFORM_ID} from '@angular/core';\nimport {Observable} from 'rxjs';\n\nimport {HttpHandler} from './backend';\nimport {HttpInterceptor} from './interceptor';\nimport {HttpRequest} from './request';\nimport {HttpEvent} from './response';\n\nexport const XSRF_COOKIE_NAME = new InjectionToken<string>('XSRF_COOKIE_NAME');\nexport const XSRF_HEADER_NAME = new InjectionToken<string>('XSRF_HEADER_NAME');\n\n/**\n * Retrieves the current XSRF token to use with the next outgoing request.\n *\n * @publicApi\n */\nexport abstract class HttpXsrfTokenExtractor {\n  /**\n   * Get the XSRF token to use with an outgoing request.\n   *\n   * Will be called for every request, so the token may change between requests.\n   */\n  abstract getToken(): string|null;\n}\n\n/**\n * `HttpXsrfTokenExtractor` which retrieves the token from a cookie.\n */\n@Injectable()\nexport class HttpXsrfCookieExtractor implements HttpXsrfTokenExtractor {\n  private lastCookieString: string = '';\n  private lastToken: string|null = null;\n\n  /**\n   * @internal for testing\n   */\n  parseCount: number = 0;\n\n  constructor(\n      @Inject(DOCUMENT) private doc: any, @Inject(PLATFORM_ID) private platform: string,\n      @Inject(XSRF_COOKIE_NAME) private cookieName: string) {}\n\n  getToken(): string|null {\n    if (this.platform === 'server') {\n      return null;\n    }\n    const cookieString = this.doc.cookie || '';\n    if (cookieString !== this.lastCookieString) {\n      this.parseCount++;\n      this.lastToken = parseCookieValue(cookieString, this.cookieName);\n      this.lastCookieString = cookieString;\n    }\n    return this.lastToken;\n  }\n}\n\n/**\n * `HttpInterceptor` which adds an XSRF token to eligible outgoing requests.\n */\n@Injectable()\nexport class HttpXsrfInterceptor implements HttpInterceptor {\n  constructor(\n      private tokenService: HttpXsrfTokenExtractor,\n      @Inject(XSRF_HEADER_NAME) private headerName: string) {}\n\n  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {\n    const lcUrl = req.url.toLowerCase();\n    // Skip both non-mutating requests and absolute URLs.\n    // Non-mutating requests don't require a token, and absolute URLs require special handling\n    // anyway as the cookie set\n    // on our origin is not the same as the token expected by another origin.\n    if (req.method === 'GET' || req.method === 'HEAD' || lcUrl.startsWith('http://') ||\n        lcUrl.startsWith('https://')) {\n      return next.handle(req);\n    }\n    const token = this.tokenService.getToken();\n\n    // Be careful not to overwrite an existing header of the same name.\n    if (token !== null && !req.headers.has(this.headerName)) {\n      req = req.clone({headers: req.headers.set(this.headerName, token)});\n    }\n    return next.handle(req);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable, Injector, ModuleWithProviders, NgModule} from '@angular/core';\nimport {Observable} from 'rxjs';\n\nimport {HttpBackend, HttpHandler} from './backend';\nimport {HttpClient} from './client';\nimport {HTTP_INTERCEPTORS, HttpInterceptor, HttpInterceptorHandler, NoopInterceptor} from './interceptor';\nimport {JsonpCallbackContext, JsonpClientBackend, JsonpInterceptor} from './jsonp';\nimport {HttpRequest} from './request';\nimport {HttpEvent} from './response';\nimport {BrowserXhr, HttpXhrBackend, XhrFactory} from './xhr';\nimport {HttpXsrfCookieExtractor, HttpXsrfInterceptor, HttpXsrfTokenExtractor, XSRF_COOKIE_NAME, XSRF_HEADER_NAME} from './xsrf';\n\n/**\n * An injectable `HttpHandler` that applies multiple interceptors\n * to a request before passing it to the given `HttpBackend`.\n *\n * The interceptors are loaded lazily from the injector, to allow\n * interceptors to themselves inject classes depending indirectly\n * on `HttpInterceptingHandler` itself.\n * @see `HttpInterceptor`\n */\n@Injectable()\nexport class HttpInterceptingHandler implements HttpHandler {\n  private chain: HttpHandler|null = null;\n\n  constructor(private backend: HttpBackend, private injector: Injector) {}\n\n  handle(req: HttpRequest<any>): Observable<HttpEvent<any>> {\n    if (this.chain === null) {\n      const interceptors = this.injector.get(HTTP_INTERCEPTORS, []);\n      this.chain = interceptors.reduceRight(\n          (next, interceptor) => new HttpInterceptorHandler(next, interceptor), this.backend);\n    }\n    return this.chain.handle(req);\n  }\n}\n\n/**\n * Constructs an `HttpHandler` that applies interceptors\n * to a request before passing it to the given `HttpBackend`.\n *\n * Use as a factory function within `HttpClientModule`.\n *\n *\n */\nexport function interceptingHandler(\n    backend: HttpBackend, interceptors: HttpInterceptor[]|null = []): HttpHandler {\n  if (!interceptors) {\n    return backend;\n  }\n  return interceptors.reduceRight(\n      (next, interceptor) => new HttpInterceptorHandler(next, interceptor), backend);\n}\n\n/**\n * Factory function that determines where to store JSONP callbacks.\n *\n * Ordinarily JSONP callbacks are stored on the `window` object, but this may not exist\n * in test environments. In that case, callbacks are stored on an anonymous object instead.\n *\n *\n */\nexport function jsonpCallbackContext(): Object {\n  if (typeof window === 'object') {\n    return window;\n  }\n  return {};\n}\n\n/**\n * Configures XSRF protection support for outgoing requests.\n *\n * For a server that supports a cookie-based XSRF protection system,\n * use directly to configure XSRF protection with the correct\n * cookie and header names.\n *\n * If no names are supplied, the default cookie name is `XSRF-TOKEN`\n * and the default header name is `X-XSRF-TOKEN`.\n *\n * @publicApi\n */\n@NgModule({\n  providers: [\n    HttpXsrfInterceptor,\n    {provide: HTTP_INTERCEPTORS, useExisting: HttpXsrfInterceptor, multi: true},\n    {provide: HttpXsrfTokenExtractor, useClass: HttpXsrfCookieExtractor},\n    {provide: XSRF_COOKIE_NAME, useValue: 'XSRF-TOKEN'},\n    {provide: XSRF_HEADER_NAME, useValue: 'X-XSRF-TOKEN'},\n  ],\n})\nexport class HttpClientXsrfModule {\n  /**\n   * Disable the default XSRF protection.\n   */\n  static disable(): ModuleWithProviders<HttpClientXsrfModule> {\n    return {\n      ngModule: HttpClientXsrfModule,\n      providers: [\n        {provide: HttpXsrfInterceptor, useClass: NoopInterceptor},\n      ],\n    };\n  }\n\n  /**\n   * Configure XSRF protection.\n   * @param options An object that can specify either or both\n   * cookie name or header name.\n   * - Cookie name default is `XSRF-TOKEN`.\n   * - Header name default is `X-XSRF-TOKEN`.\n   *\n   */\n  static withOptions(options: {\n    cookieName?: string,\n    headerName?: string,\n  } = {}): ModuleWithProviders<HttpClientXsrfModule> {\n    return {\n      ngModule: HttpClientXsrfModule,\n      providers: [\n        options.cookieName ? {provide: XSRF_COOKIE_NAME, useValue: options.cookieName} : [],\n        options.headerName ? {provide: XSRF_HEADER_NAME, useValue: options.headerName} : [],\n      ],\n    };\n  }\n}\n\n/**\n * Configures the [dependency injector](guide/glossary#injector) for `HttpClient`\n * with supporting services for XSRF. Automatically imported by `HttpClientModule`.\n *\n * You can add interceptors to the chain behind `HttpClient` by binding them to the\n * multiprovider for built-in [DI token](guide/glossary#di-token) `HTTP_INTERCEPTORS`.\n *\n * @publicApi\n */\n@NgModule({\n  /**\n   * Optional configuration for XSRF protection.\n   */\n  imports: [\n    HttpClientXsrfModule.withOptions({\n      cookieName: 'XSRF-TOKEN',\n      headerName: 'X-XSRF-TOKEN',\n    }),\n  ],\n  /**\n   * Configures the [dependency injector](guide/glossary#injector) where it is imported\n   * with supporting services for HTTP communications.\n   */\n  providers: [\n    HttpClient,\n    {provide: HttpHandler, useClass: HttpInterceptingHandler},\n    HttpXhrBackend,\n    {provide: HttpBackend, useExisting: HttpXhrBackend},\n    BrowserXhr,\n    {provide: XhrFactory, useExisting: BrowserXhr},\n  ],\n})\nexport class HttpClientModule {\n}\n\n/**\n * Configures the [dependency injector](guide/glossary#injector) for `HttpClient`\n * with supporting services for JSONP.\n * Without this module, Jsonp requests reach the backend\n * with method JSONP, where they are rejected.\n *\n * You can add interceptors to the chain behind `HttpClient` by binding them to the\n * multiprovider for built-in [DI token](guide/glossary#di-token) `HTTP_INTERCEPTORS`.\n *\n * @publicApi\n */\n@NgModule({\n  providers: [\n    JsonpClientBackend,\n    {provide: JsonpCallbackContext, useFactory: jsonpCallbackContext},\n    {provide: HTTP_INTERCEPTORS, useClass: JsonpInterceptor, multi: true},\n  ],\n})\nexport class HttpClientJsonpModule {\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport {HttpBackend, HttpHandler} from './src/backend';\nexport {HttpClient} from './src/client';\nexport {HttpHeaders} from './src/headers';\nexport {HTTP_INTERCEPTORS, HttpInterceptor} from './src/interceptor';\nexport {JsonpClientBackend, JsonpInterceptor} from './src/jsonp';\nexport {HttpClientJsonpModule, HttpClientModule, HttpClientXsrfModule, HttpInterceptingHandler as ɵHttpInterceptingHandler} from './src/module';\nexport {HttpParameterCodec, HttpParams, HttpUrlEncodingCodec} from './src/params';\nexport {HttpRequest} from './src/request';\nexport {HttpDownloadProgressEvent, HttpErrorResponse, HttpEvent, HttpEventType, HttpHeaderResponse, HttpProgressEvent, HttpResponse, HttpResponseBase, HttpSentEvent, HttpUploadProgressEvent, HttpUserEvent} from './src/response';\nexport {HttpXhrBackend, XhrFactory} from './src/xhr';\nexport {HttpXsrfTokenExtractor} from './src/xsrf';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n// This file is not used to build this module. It is only used during editing\n// by the TypeScript language service and during build for verification. `ngc`\n// replaces this file with production index.ts when it rewrites private symbol\n// names.\n\nexport * from './public_api';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './index';\n\nexport {NoopInterceptor as ɵangular_packages_common_http_http_a} from './src/interceptor';\nexport {JsonpCallbackContext as ɵangular_packages_common_http_http_b} from './src/jsonp';\nexport {jsonpCallbackContext as ɵangular_packages_common_http_http_c} from './src/module';\nexport {BrowserXhr as ɵangular_packages_common_http_http_d} from './src/xhr';\nexport {HttpXsrfCookieExtractor as ɵangular_packages_common_http_http_g,HttpXsrfInterceptor as ɵangular_packages_common_http_http_h,XSRF_COOKIE_NAME as ɵangular_packages_common_http_http_e,XSRF_HEADER_NAME as ɵangular_packages_common_http_http_f} from './src/xsrf';","/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation.\r\n\r\nPermission to use, copy, modify, and/or distribute this software for any\r\npurpose with or without fee is hereby granted.\r\n\r\nTHE SOFTWARE IS PROVIDED \"AS IS\" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH\r\nREGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY\r\nAND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,\r\nINDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM\r\nLOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR\r\nOTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR\r\nPERFORMANCE OF THIS SOFTWARE.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = function(d, b) {\r\n    extendStatics = Object.setPrototypeOf ||\r\n        ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n        function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n    return extendStatics(d, b);\r\n};\r\n\r\nexport function __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\nexport var __assign = function() {\r\n    __assign = Object.assign || function __assign(t) {\r\n        for (var s, i = 1, n = arguments.length; i < n; i++) {\r\n            s = arguments[i];\r\n            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];\r\n        }\r\n        return t;\r\n    }\r\n    return __assign.apply(this, arguments);\r\n}\r\n\r\nexport function __rest(s, e) {\r\n    var t = {};\r\n    for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)\r\n        t[p] = s[p];\r\n    if (s != null && typeof Object.getOwnPropertySymbols === \"function\")\r\n        for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {\r\n            if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))\r\n                t[p[i]] = s[p[i]];\r\n        }\r\n    return t;\r\n}\r\n\r\nexport function __decorate(decorators, target, key, desc) {\r\n    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\r\n    if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\r\n    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\r\n    return c > 3 && r && Object.defineProperty(target, key, r), r;\r\n}\r\n\r\nexport function __param(paramIndex, decorator) {\r\n    return function (target, key) { decorator(target, key, paramIndex); }\r\n}\r\n\r\nexport function __metadata(metadataKey, metadataValue) {\r\n    if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(metadataKey, metadataValue);\r\n}\r\n\r\nexport function __awaiter(thisArg, _arguments, P, generator) {\r\n    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }\r\n    return new (P || (P = Promise))(function (resolve, reject) {\r\n        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\r\n        function rejected(value) { try { step(generator[\"throw\"](value)); } catch (e) { reject(e); } }\r\n        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }\r\n        step((generator = generator.apply(thisArg, _arguments || [])).next());\r\n    });\r\n}\r\n\r\nexport function __generator(thisArg, body) {\r\n    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\r\n    return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\r\n    function verb(n) { return function (v) { return step([n, v]); }; }\r\n    function step(op) {\r\n        if (f) throw new TypeError(\"Generator is already executing.\");\r\n        while (_) try {\r\n            if (f = 1, y && (t = op[0] & 2 ? y[\"return\"] : op[0] ? y[\"throw\"] || ((t = y[\"return\"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;\r\n            if (y = 0, t) op = [op[0] & 2, t.value];\r\n            switch (op[0]) {\r\n                case 0: case 1: t = op; break;\r\n                case 4: _.label++; return { value: op[1], done: false };\r\n                case 5: _.label++; y = op[1]; op = [0]; continue;\r\n                case 7: op = _.ops.pop(); _.trys.pop(); continue;\r\n                default:\r\n                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\r\n                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\r\n                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\r\n                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\r\n                    if (t[2]) _.ops.pop();\r\n                    _.trys.pop(); continue;\r\n            }\r\n            op = body.call(thisArg, _);\r\n        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\r\n        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\r\n    }\r\n}\r\n\r\nexport function __createBinding(o, m, k, k2) {\r\n    if (k2 === undefined) k2 = k;\r\n    o[k2] = m[k];\r\n}\r\n\r\nexport function __exportStar(m, exports) {\r\n    for (var p in m) if (p !== \"default\" && !exports.hasOwnProperty(p)) exports[p] = m[p];\r\n}\r\n\r\nexport function __values(o) {\r\n    var s = typeof Symbol === \"function\" && Symbol.iterator, m = s && o[s], i = 0;\r\n    if (m) return m.call(o);\r\n    if (o && typeof o.length === \"number\") return {\r\n        next: function () {\r\n            if (o && i >= o.length) o = void 0;\r\n            return { value: o && o[i++], done: !o };\r\n        }\r\n    };\r\n    throw new TypeError(s ? \"Object is not iterable.\" : \"Symbol.iterator is not defined.\");\r\n}\r\n\r\nexport function __read(o, n) {\r\n    var m = typeof Symbol === \"function\" && o[Symbol.iterator];\r\n    if (!m) return o;\r\n    var i = m.call(o), r, ar = [], e;\r\n    try {\r\n        while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);\r\n    }\r\n    catch (error) { e = { error: error }; }\r\n    finally {\r\n        try {\r\n            if (r && !r.done && (m = i[\"return\"])) m.call(i);\r\n        }\r\n        finally { if (e) throw e.error; }\r\n    }\r\n    return ar;\r\n}\r\n\r\nexport function __spread() {\r\n    for (var ar = [], i = 0; i < arguments.length; i++)\r\n        ar = ar.concat(__read(arguments[i]));\r\n    return ar;\r\n}\r\n\r\nexport function __spreadArrays() {\r\n    for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;\r\n    for (var r = Array(s), k = 0, i = 0; i < il; i++)\r\n        for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)\r\n            r[k] = a[j];\r\n    return r;\r\n};\r\n\r\nexport function __await(v) {\r\n    return this instanceof __await ? (this.v = v, this) : new __await(v);\r\n}\r\n\r\nexport function __asyncGenerator(thisArg, _arguments, generator) {\r\n    if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n    var g = generator.apply(thisArg, _arguments || []), i, q = [];\r\n    return i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i;\r\n    function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }\r\n    function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }\r\n    function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }\r\n    function fulfill(value) { resume(\"next\", value); }\r\n    function reject(value) { resume(\"throw\", value); }\r\n    function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }\r\n}\r\n\r\nexport function __asyncDelegator(o) {\r\n    var i, p;\r\n    return i = {}, verb(\"next\"), verb(\"throw\", function (e) { throw e; }), verb(\"return\"), i[Symbol.iterator] = function () { return this; }, i;\r\n    function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: n === \"return\" } : f ? f(v) : v; } : f; }\r\n}\r\n\r\nexport function __asyncValues(o) {\r\n    if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n    var m = o[Symbol.asyncIterator], i;\r\n    return m ? m.call(o) : (o = typeof __values === \"function\" ? __values(o) : o[Symbol.iterator](), i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i);\r\n    function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }\r\n    function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }\r\n}\r\n\r\nexport function __makeTemplateObject(cooked, raw) {\r\n    if (Object.defineProperty) { Object.defineProperty(cooked, \"raw\", { value: raw }); } else { cooked.raw = raw; }\r\n    return cooked;\r\n};\r\n\r\nexport function __importStar(mod) {\r\n    if (mod && mod.__esModule) return mod;\r\n    var result = {};\r\n    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];\r\n    result.default = mod;\r\n    return result;\r\n}\r\n\r\nexport function __importDefault(mod) {\r\n    return (mod && mod.__esModule) ? mod : { default: mod };\r\n}\r\n\r\nexport function __classPrivateFieldGet(receiver, privateMap) {\r\n    if (!privateMap.has(receiver)) {\r\n        throw new TypeError(\"attempted to get private field on non-instance\");\r\n    }\r\n    return privateMap.get(receiver);\r\n}\r\n\r\nexport function __classPrivateFieldSet(receiver, privateMap, value) {\r\n    if (!privateMap.has(receiver)) {\r\n        throw new TypeError(\"attempted to set private field on non-instance\");\r\n    }\r\n    privateMap.set(receiver, value);\r\n    return value;\r\n}\r\n","import { SimpleOuterSubscriber, innerSubscribe, SimpleInnerSubscriber } from '../innerSubscribe';\nexport function audit(durationSelector) {\n    return function auditOperatorFunction(source) {\n        return source.lift(new AuditOperator(durationSelector));\n    };\n}\nclass AuditOperator {\n    constructor(durationSelector) {\n        this.durationSelector = durationSelector;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new AuditSubscriber(subscriber, this.durationSelector));\n    }\n}\nclass AuditSubscriber extends SimpleOuterSubscriber {\n    constructor(destination, durationSelector) {\n        super(destination);\n        this.durationSelector = durationSelector;\n        this.hasValue = false;\n    }\n    _next(value) {\n        this.value = value;\n        this.hasValue = true;\n        if (!this.throttled) {\n            let duration;\n            try {\n                const { durationSelector } = this;\n                duration = durationSelector(value);\n            }\n            catch (err) {\n                return this.destination.error(err);\n            }\n            const innerSubscription = innerSubscribe(duration, new SimpleInnerSubscriber(this));\n            if (!innerSubscription || innerSubscription.closed) {\n                this.clearThrottle();\n            }\n            else {\n                this.add(this.throttled = innerSubscription);\n            }\n        }\n    }\n    clearThrottle() {\n        const { value, hasValue, throttled } = this;\n        if (throttled) {\n            this.remove(throttled);\n            this.throttled = undefined;\n            throttled.unsubscribe();\n        }\n        if (hasValue) {\n            this.value = undefined;\n            this.hasValue = false;\n            this.destination.next(value);\n        }\n    }\n    notifyNext() {\n        this.clearThrottle();\n    }\n    notifyComplete() {\n        this.clearThrottle();\n    }\n}\n//# sourceMappingURL=audit.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Route} from './config';\nimport {ActivatedRouteSnapshot, RouterStateSnapshot} from './router_state';\n\n/**\n * Identifies the call or event that triggered a navigation.\n *\n * * 'imperative': Triggered by `router.navigateByUrl()` or `router.navigate()`.\n * * 'popstate' : Triggered by a `popstate` event.\n * * 'hashchange'-: Triggered by a `hashchange` event.\n *\n * @publicApi\n */\nexport type NavigationTrigger = 'imperative'|'popstate'|'hashchange';\n\n/**\n * Base for events the router goes through, as opposed to events tied to a specific\n * route. Fired one time for any given navigation.\n *\n * The following code shows how a class subscribes to router events.\n *\n * ```ts\n * class MyService {\n *   constructor(public router: Router, logger: Logger) {\n *     router.events.pipe(\n *        filter((e: Event): e is RouterEvent => e instanceof RouterEvent)\n *     ).subscribe((e: RouterEvent) => {\n *       logger.log(e.id, e.url);\n *     });\n *   }\n * }\n * ```\n *\n * @see `Event`\n * @see [Router events summary](guide/router#router-events)\n * @publicApi\n */\nexport class RouterEvent {\n  constructor(\n      /** A unique ID that the router assigns to every router navigation. */\n      public id: number,\n      /** The URL that is the destination for this navigation. */\n      public url: string) {}\n}\n\n/**\n * An event triggered when a navigation starts.\n *\n * @publicApi\n */\nexport class NavigationStart extends RouterEvent {\n  /**\n   * Identifies the call or event that triggered the navigation.\n   * An `imperative` trigger is a call to `router.navigateByUrl()` or `router.navigate()`.\n   *\n   * @see `NavigationEnd`\n   * @see `NavigationCancel`\n   * @see `NavigationError`\n   */\n  navigationTrigger?: 'imperative'|'popstate'|'hashchange';\n\n  /**\n   * The navigation state that was previously supplied to the `pushState` call,\n   * when the navigation is triggered by a `popstate` event. Otherwise null.\n   *\n   * The state object is defined by `NavigationExtras`, and contains any\n   * developer-defined state value, as well as a unique ID that\n   * the router assigns to every router transition/navigation.\n   *\n   * From the perspective of the router, the router never \"goes back\".\n   * When the user clicks on the back button in the browser,\n   * a new navigation ID is created.\n   *\n   * Use the ID in this previous-state object to differentiate between a newly created\n   * state and one returned to by a `popstate` event, so that you can restore some\n   * remembered state, such as scroll position.\n   *\n   */\n  restoredState?: {[k: string]: any, navigationId: number}|null;\n\n  constructor(\n      /** @docsNotRequired */\n      id: number,\n      /** @docsNotRequired */\n      url: string,\n      /** @docsNotRequired */\n      navigationTrigger: 'imperative'|'popstate'|'hashchange' = 'imperative',\n      /** @docsNotRequired */\n      restoredState: {[k: string]: any, navigationId: number}|null = null) {\n    super(id, url);\n    this.navigationTrigger = navigationTrigger;\n    this.restoredState = restoredState;\n  }\n\n  /** @docsNotRequired */\n  toString(): string {\n    return `NavigationStart(id: ${this.id}, url: '${this.url}')`;\n  }\n}\n\n/**\n * An event triggered when a navigation ends successfully.\n *\n * @see `NavigationStart`\n * @see `NavigationCancel`\n * @see `NavigationError`\n *\n * @publicApi\n */\nexport class NavigationEnd extends RouterEvent {\n  constructor(\n      /** @docsNotRequired */\n      id: number,\n      /** @docsNotRequired */\n      url: string,\n      /** @docsNotRequired */\n      public urlAfterRedirects: string) {\n    super(id, url);\n  }\n\n  /** @docsNotRequired */\n  toString(): string {\n    return `NavigationEnd(id: ${this.id}, url: '${this.url}', urlAfterRedirects: '${\n        this.urlAfterRedirects}')`;\n  }\n}\n\n/**\n * An event triggered when a navigation is canceled, directly or indirectly.\n * This can happen when a route guard\n * returns `false` or initiates a redirect by returning a `UrlTree`.\n *\n * @see `NavigationStart`\n * @see `NavigationEnd`\n * @see `NavigationError`\n *\n * @publicApi\n */\nexport class NavigationCancel extends RouterEvent {\n  constructor(\n      /** @docsNotRequired */\n      id: number,\n      /** @docsNotRequired */\n      url: string,\n      /** @docsNotRequired */\n      public reason: string) {\n    super(id, url);\n  }\n\n  /** @docsNotRequired */\n  toString(): string {\n    return `NavigationCancel(id: ${this.id}, url: '${this.url}')`;\n  }\n}\n\n/**\n * An event triggered when a navigation fails due to an unexpected error.\n *\n * @see `NavigationStart`\n * @see `NavigationEnd`\n * @see `NavigationCancel`\n *\n * @publicApi\n */\nexport class NavigationError extends RouterEvent {\n  constructor(\n      /** @docsNotRequired */\n      id: number,\n      /** @docsNotRequired */\n      url: string,\n      /** @docsNotRequired */\n      public error: any) {\n    super(id, url);\n  }\n\n  /** @docsNotRequired */\n  toString(): string {\n    return `NavigationError(id: ${this.id}, url: '${this.url}', error: ${this.error})`;\n  }\n}\n\n/**\n * An event triggered when routes are recognized.\n *\n * @publicApi\n */\nexport class RoutesRecognized extends RouterEvent {\n  constructor(\n      /** @docsNotRequired */\n      id: number,\n      /** @docsNotRequired */\n      url: string,\n      /** @docsNotRequired */\n      public urlAfterRedirects: string,\n      /** @docsNotRequired */\n      public state: RouterStateSnapshot) {\n    super(id, url);\n  }\n\n  /** @docsNotRequired */\n  toString(): string {\n    return `RoutesRecognized(id: ${this.id}, url: '${this.url}', urlAfterRedirects: '${\n        this.urlAfterRedirects}', state: ${this.state})`;\n  }\n}\n\n/**\n * An event triggered at the start of the Guard phase of routing.\n *\n * @see `GuardsCheckEnd`\n *\n * @publicApi\n */\nexport class GuardsCheckStart extends RouterEvent {\n  constructor(\n      /** @docsNotRequired */\n      id: number,\n      /** @docsNotRequired */\n      url: string,\n      /** @docsNotRequired */\n      public urlAfterRedirects: string,\n      /** @docsNotRequired */\n      public state: RouterStateSnapshot) {\n    super(id, url);\n  }\n\n  toString(): string {\n    return `GuardsCheckStart(id: ${this.id}, url: '${this.url}', urlAfterRedirects: '${\n        this.urlAfterRedirects}', state: ${this.state})`;\n  }\n}\n\n/**\n * An event triggered at the end of the Guard phase of routing.\n *\n * @see `GuardsCheckStart`\n *\n * @publicApi\n */\nexport class GuardsCheckEnd extends RouterEvent {\n  constructor(\n      /** @docsNotRequired */\n      id: number,\n      /** @docsNotRequired */\n      url: string,\n      /** @docsNotRequired */\n      public urlAfterRedirects: string,\n      /** @docsNotRequired */\n      public state: RouterStateSnapshot,\n      /** @docsNotRequired */\n      public shouldActivate: boolean) {\n    super(id, url);\n  }\n\n  toString(): string {\n    return `GuardsCheckEnd(id: ${this.id}, url: '${this.url}', urlAfterRedirects: '${\n        this.urlAfterRedirects}', state: ${this.state}, shouldActivate: ${this.shouldActivate})`;\n  }\n}\n\n/**\n * An event triggered at the the start of the Resolve phase of routing.\n *\n * Runs in the \"resolve\" phase whether or not there is anything to resolve.\n * In future, may change to only run when there are things to be resolved.\n *\n * @see `ResolveEnd`\n *\n * @publicApi\n */\nexport class ResolveStart extends RouterEvent {\n  constructor(\n      /** @docsNotRequired */\n      id: number,\n      /** @docsNotRequired */\n      url: string,\n      /** @docsNotRequired */\n      public urlAfterRedirects: string,\n      /** @docsNotRequired */\n      public state: RouterStateSnapshot) {\n    super(id, url);\n  }\n\n  toString(): string {\n    return `ResolveStart(id: ${this.id}, url: '${this.url}', urlAfterRedirects: '${\n        this.urlAfterRedirects}', state: ${this.state})`;\n  }\n}\n\n/**\n * An event triggered at the end of the Resolve phase of routing.\n * @see `ResolveStart`.\n *\n * @publicApi\n */\nexport class ResolveEnd extends RouterEvent {\n  constructor(\n      /** @docsNotRequired */\n      id: number,\n      /** @docsNotRequired */\n      url: string,\n      /** @docsNotRequired */\n      public urlAfterRedirects: string,\n      /** @docsNotRequired */\n      public state: RouterStateSnapshot) {\n    super(id, url);\n  }\n\n  toString(): string {\n    return `ResolveEnd(id: ${this.id}, url: '${this.url}', urlAfterRedirects: '${\n        this.urlAfterRedirects}', state: ${this.state})`;\n  }\n}\n\n/**\n * An event triggered before lazy loading a route configuration.\n *\n * @see `RouteConfigLoadEnd`\n *\n * @publicApi\n */\nexport class RouteConfigLoadStart {\n  constructor(\n      /** @docsNotRequired */\n      public route: Route) {}\n  toString(): string {\n    return `RouteConfigLoadStart(path: ${this.route.path})`;\n  }\n}\n\n/**\n * An event triggered when a route has been lazy loaded.\n *\n * @see `RouteConfigLoadStart`\n *\n * @publicApi\n */\nexport class RouteConfigLoadEnd {\n  constructor(\n      /** @docsNotRequired */\n      public route: Route) {}\n  toString(): string {\n    return `RouteConfigLoadEnd(path: ${this.route.path})`;\n  }\n}\n\n/**\n * An event triggered at the start of the child-activation\n * part of the Resolve phase of routing.\n * @see  `ChildActivationEnd`\n * @see `ResolveStart`\n *\n * @publicApi\n */\nexport class ChildActivationStart {\n  constructor(\n      /** @docsNotRequired */\n      public snapshot: ActivatedRouteSnapshot) {}\n  toString(): string {\n    const path = this.snapshot.routeConfig && this.snapshot.routeConfig.path || '';\n    return `ChildActivationStart(path: '${path}')`;\n  }\n}\n\n/**\n * An event triggered at the end of the child-activation part\n * of the Resolve phase of routing.\n * @see `ChildActivationStart`\n * @see `ResolveStart`\n * @publicApi\n */\nexport class ChildActivationEnd {\n  constructor(\n      /** @docsNotRequired */\n      public snapshot: ActivatedRouteSnapshot) {}\n  toString(): string {\n    const path = this.snapshot.routeConfig && this.snapshot.routeConfig.path || '';\n    return `ChildActivationEnd(path: '${path}')`;\n  }\n}\n\n/**\n * An event triggered at the start of the activation part\n * of the Resolve phase of routing.\n * @see `ActivationEnd`\n * @see `ResolveStart`\n *\n * @publicApi\n */\nexport class ActivationStart {\n  constructor(\n      /** @docsNotRequired */\n      public snapshot: ActivatedRouteSnapshot) {}\n  toString(): string {\n    const path = this.snapshot.routeConfig && this.snapshot.routeConfig.path || '';\n    return `ActivationStart(path: '${path}')`;\n  }\n}\n\n/**\n * An event triggered at the end of the activation part\n * of the Resolve phase of routing.\n * @see `ActivationStart`\n * @see `ResolveStart`\n *\n * @publicApi\n */\nexport class ActivationEnd {\n  constructor(\n      /** @docsNotRequired */\n      public snapshot: ActivatedRouteSnapshot) {}\n  toString(): string {\n    const path = this.snapshot.routeConfig && this.snapshot.routeConfig.path || '';\n    return `ActivationEnd(path: '${path}')`;\n  }\n}\n\n/**\n * An event triggered by scrolling.\n *\n * @publicApi\n */\nexport class Scroll {\n  constructor(\n      /** @docsNotRequired */\n      readonly routerEvent: NavigationEnd,\n\n      /** @docsNotRequired */\n      readonly position: [number, number]|null,\n\n      /** @docsNotRequired */\n      readonly anchor: string|null) {}\n\n  toString(): string {\n    const pos = this.position ? `${this.position[0]}, ${this.position[1]}` : null;\n    return `Scroll(anchor: '${this.anchor}', position: '${pos}')`;\n  }\n}\n\n/**\n * Router events that allow you to track the lifecycle of the router.\n *\n * The events occur in the following sequence:\n *\n * * [NavigationStart](api/router/NavigationStart): Navigation starts.\n * * [RouteConfigLoadStart](api/router/RouteConfigLoadStart): Before\n * the router [lazy loads](/guide/router#lazy-loading) a route configuration.\n * * [RouteConfigLoadEnd](api/router/RouteConfigLoadEnd): After a route has been lazy loaded.\n * * [RoutesRecognized](api/router/RoutesRecognized): When the router parses the URL\n * and the routes are recognized.\n * * [GuardsCheckStart](api/router/GuardsCheckStart): When the router begins the *guards*\n * phase of routing.\n * * [ChildActivationStart](api/router/ChildActivationStart): When the router\n * begins activating a route's children.\n * * [ActivationStart](api/router/ActivationStart): When the router begins activating a route.\n * * [GuardsCheckEnd](api/router/GuardsCheckEnd): When the router finishes the *guards*\n * phase of routing successfully.\n * * [ResolveStart](api/router/ResolveStart): When the router begins the *resolve*\n * phase of routing.\n * * [ResolveEnd](api/router/ResolveEnd): When the router finishes the *resolve*\n * phase of routing successfuly.\n * * [ChildActivationEnd](api/router/ChildActivationEnd): When the router finishes\n * activating a route's children.\n * * [ActivationEnd](api/router/ActivationStart): When the router finishes activating a route.\n * * [NavigationEnd](api/router/NavigationEnd): When navigation ends successfully.\n * * [NavigationCancel](api/router/NavigationCancel): When navigation is canceled.\n * * [NavigationError](api/router/NavigationError): When navigation fails\n * due to an unexpected error.\n * * [Scroll](api/router/Scroll): When the user scrolls.\n *\n * @publicApi\n */\nexport type Event = RouterEvent|RouteConfigLoadStart|RouteConfigLoadEnd|ChildActivationStart|\n    ChildActivationEnd|ActivationStart|ActivationEnd|Scroll;\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Route, UrlMatchResult} from './config';\nimport {UrlSegment, UrlSegmentGroup} from './url_tree';\n\n\n/**\n * The primary routing outlet.\n *\n * @publicApi\n */\nexport const PRIMARY_OUTLET = 'primary';\n\n/**\n * A collection of matrix and query URL parameters.\n * @see `convertToParamMap()`\n * @see `ParamMap`\n *\n * @publicApi\n */\nexport type Params = {\n  [key: string]: any;\n};\n\n/**\n * A map that provides access to the required and optional parameters\n * specific to a route.\n * The map supports retrieving a single value with `get()`\n * or multiple values with `getAll()`.\n *\n * @see [URLSearchParams](https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams)\n *\n * @publicApi\n */\nexport interface ParamMap {\n  /**\n   * Reports whether the map contains a given parameter.\n   * @param name The parameter name.\n   * @returns True if the map contains the given parameter, false otherwise.\n   */\n  has(name: string): boolean;\n  /**\n   * Retrieves a single value for a parameter.\n   * @param name The parameter name.\n   * @return The parameter's single value,\n   * or the first value if the parameter has multiple values,\n   * or `null` when there is no such parameter.\n   */\n  get(name: string): string|null;\n  /**\n   * Retrieves multiple values for a parameter.\n   * @param name The parameter name.\n   * @return An array containing one or more values,\n   * or an empty array if there is no such parameter.\n   *\n   */\n  getAll(name: string): string[];\n\n  /** Names of the parameters in the map. */\n  readonly keys: string[];\n}\n\nclass ParamsAsMap implements ParamMap {\n  private params: Params;\n\n  constructor(params: Params) {\n    this.params = params || {};\n  }\n\n  has(name: string): boolean {\n    return Object.prototype.hasOwnProperty.call(this.params, name);\n  }\n\n  get(name: string): string|null {\n    if (this.has(name)) {\n      const v = this.params[name];\n      return Array.isArray(v) ? v[0] : v;\n    }\n\n    return null;\n  }\n\n  getAll(name: string): string[] {\n    if (this.has(name)) {\n      const v = this.params[name];\n      return Array.isArray(v) ? v : [v];\n    }\n\n    return [];\n  }\n\n  get keys(): string[] {\n    return Object.keys(this.params);\n  }\n}\n\n/**\n * Converts a `Params` instance to a `ParamMap`.\n * @param params The instance to convert.\n * @returns The new map instance.\n *\n * @publicApi\n */\nexport function convertToParamMap(params: Params): ParamMap {\n  return new ParamsAsMap(params);\n}\n\nconst NAVIGATION_CANCELING_ERROR = 'ngNavigationCancelingError';\n\nexport function navigationCancelingError(message: string) {\n  const error = Error('NavigationCancelingError: ' + message);\n  (error as any)[NAVIGATION_CANCELING_ERROR] = true;\n  return error;\n}\n\nexport function isNavigationCancelingError(error: Error) {\n  return error && (error as any)[NAVIGATION_CANCELING_ERROR];\n}\n\n// Matches the route configuration (`route`) against the actual URL (`segments`).\nexport function defaultUrlMatcher(\n    segments: UrlSegment[], segmentGroup: UrlSegmentGroup, route: Route): UrlMatchResult|null {\n  const parts = route.path!.split('/');\n\n  if (parts.length > segments.length) {\n    // The actual URL is shorter than the config, no match\n    return null;\n  }\n\n  if (route.pathMatch === 'full' &&\n      (segmentGroup.hasChildren() || parts.length < segments.length)) {\n    // The config is longer than the actual URL but we are looking for a full match, return null\n    return null;\n  }\n\n  const posParams: {[key: string]: UrlSegment} = {};\n\n  // Check each config part against the actual URL\n  for (let index = 0; index < parts.length; index++) {\n    const part = parts[index];\n    const segment = segments[index];\n    const isParameter = part.startsWith(':');\n    if (isParameter) {\n      posParams[part.substring(1)] = segment;\n    } else if (part !== segment.path) {\n      // The actual URL part does not match the config, no match\n      return null;\n    }\n  }\n\n  return {consumed: segments.slice(0, parts.length), posParams};\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ɵisObservable as isObservable, ɵisPromise as isPromise} from '@angular/core';\nimport {from, Observable, of} from 'rxjs';\nimport {concatAll, last as lastValue, map} from 'rxjs/operators';\n\nimport {Params, PRIMARY_OUTLET} from '../shared';\n\nexport function shallowEqualArrays(a: any[], b: any[]): boolean {\n  if (a.length !== b.length) return false;\n  for (let i = 0; i < a.length; ++i) {\n    if (!shallowEqual(a[i], b[i])) return false;\n  }\n  return true;\n}\n\nexport function shallowEqual(a: Params, b: Params): boolean {\n  // Casting Object.keys return values to include `undefined` as there are some cases\n  // in IE 11 where this can happen. Cannot provide a test because the behavior only\n  // exists in certain circumstances in IE 11, therefore doing this cast ensures the\n  // logic is correct for when this edge case is hit.\n  const k1 = Object.keys(a) as string[] | undefined;\n  const k2 = Object.keys(b) as string[] | undefined;\n  if (!k1 || !k2 || k1.length != k2.length) {\n    return false;\n  }\n  let key: string;\n  for (let i = 0; i < k1.length; i++) {\n    key = k1[i];\n    if (!equalArraysOrString(a[key], b[key])) {\n      return false;\n    }\n  }\n  return true;\n}\n\n/**\n * Test equality for arrays of strings or a string.\n */\nexport function equalArraysOrString(a: string|string[], b: string|string[]) {\n  if (Array.isArray(a) && Array.isArray(b)) {\n    if (a.length !== b.length) return false;\n    const aSorted = [...a].sort();\n    const bSorted = [...b].sort();\n    return aSorted.every((val, index) => bSorted[index] === val);\n  } else {\n    return a === b;\n  }\n}\n\n/**\n * Flattens single-level nested arrays.\n */\nexport function flatten<T>(arr: T[][]): T[] {\n  return Array.prototype.concat.apply([], arr);\n}\n\n/**\n * Return the last element of an array.\n */\nexport function last<T>(a: T[]): T|null {\n  return a.length > 0 ? a[a.length - 1] : null;\n}\n\n/**\n * Verifys all booleans in an array are `true`.\n */\nexport function and(bools: boolean[]): boolean {\n  return !bools.some(v => !v);\n}\n\nexport function forEach<K, V>(map: {[key: string]: V}, callback: (v: V, k: string) => void): void {\n  for (const prop in map) {\n    if (map.hasOwnProperty(prop)) {\n      callback(map[prop], prop);\n    }\n  }\n}\n\nexport function waitForMap<A, B>(\n    obj: {[k: string]: A}, fn: (k: string, a: A) => Observable<B>): Observable<{[k: string]: B}> {\n  if (Object.keys(obj).length === 0) {\n    return of({});\n  }\n\n  const waitHead: Observable<B>[] = [];\n  const waitTail: Observable<B>[] = [];\n  const res: {[k: string]: B} = {};\n\n  forEach(obj, (a: A, k: string) => {\n    const mapped = fn(k, a).pipe(map((r: B) => res[k] = r));\n    if (k === PRIMARY_OUTLET) {\n      waitHead.push(mapped);\n    } else {\n      waitTail.push(mapped);\n    }\n  });\n\n  // Closure compiler has problem with using spread operator here. So we use \"Array.concat\".\n  // Note that we also need to cast the new promise because TypeScript cannot infer the type\n  // when calling the \"of\" function through \"Function.apply\"\n  return (of.apply(null, waitHead.concat(waitTail)) as Observable<Observable<B>>)\n      .pipe(concatAll(), lastValue(), map(() => res));\n}\n\nexport function wrapIntoObservable<T>(value: T|Promise<T>|Observable<T>): Observable<T> {\n  if (isObservable(value)) {\n    return value;\n  }\n\n  if (isPromise(value)) {\n    // Use `Promise.resolve()` to wrap promise-like instances.\n    // Required ie when a Resolver returns a AngularJS `$q` promise to correctly trigger the\n    // change detection.\n    return from(Promise.resolve(value));\n  }\n\n  return of(value);\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {convertToParamMap, ParamMap, Params, PRIMARY_OUTLET} from './shared';\nimport {equalArraysOrString, forEach, shallowEqual} from './utils/collection';\n\nexport function createEmptyUrlTree() {\n  return new UrlTree(new UrlSegmentGroup([], {}), {}, null);\n}\n\nexport function containsTree(container: UrlTree, containee: UrlTree, exact: boolean): boolean {\n  if (exact) {\n    return equalQueryParams(container.queryParams, containee.queryParams) &&\n        equalSegmentGroups(container.root, containee.root);\n  }\n\n  return containsQueryParams(container.queryParams, containee.queryParams) &&\n      containsSegmentGroup(container.root, containee.root);\n}\n\nfunction equalQueryParams(container: Params, containee: Params): boolean {\n  // TODO: This does not handle array params correctly.\n  return shallowEqual(container, containee);\n}\n\nfunction equalSegmentGroups(container: UrlSegmentGroup, containee: UrlSegmentGroup): boolean {\n  if (!equalPath(container.segments, containee.segments)) return false;\n  if (container.numberOfChildren !== containee.numberOfChildren) return false;\n  for (const c in containee.children) {\n    if (!container.children[c]) return false;\n    if (!equalSegmentGroups(container.children[c], containee.children[c])) return false;\n  }\n  return true;\n}\n\nfunction containsQueryParams(container: Params, containee: Params): boolean {\n  return Object.keys(containee).length <= Object.keys(container).length &&\n      Object.keys(containee).every(key => equalArraysOrString(container[key], containee[key]));\n}\n\nfunction containsSegmentGroup(container: UrlSegmentGroup, containee: UrlSegmentGroup): boolean {\n  return containsSegmentGroupHelper(container, containee, containee.segments);\n}\n\nfunction containsSegmentGroupHelper(\n    container: UrlSegmentGroup, containee: UrlSegmentGroup, containeePaths: UrlSegment[]): boolean {\n  if (container.segments.length > containeePaths.length) {\n    const current = container.segments.slice(0, containeePaths.length);\n    if (!equalPath(current, containeePaths)) return false;\n    if (containee.hasChildren()) return false;\n    return true;\n\n  } else if (container.segments.length === containeePaths.length) {\n    if (!equalPath(container.segments, containeePaths)) return false;\n    for (const c in containee.children) {\n      if (!container.children[c]) return false;\n      if (!containsSegmentGroup(container.children[c], containee.children[c])) return false;\n    }\n    return true;\n\n  } else {\n    const current = containeePaths.slice(0, container.segments.length);\n    const next = containeePaths.slice(container.segments.length);\n    if (!equalPath(container.segments, current)) return false;\n    if (!container.children[PRIMARY_OUTLET]) return false;\n    return containsSegmentGroupHelper(container.children[PRIMARY_OUTLET], containee, next);\n  }\n}\n\n/**\n * @description\n *\n * Represents the parsed URL.\n *\n * Since a router state is a tree, and the URL is nothing but a serialized state, the URL is a\n * serialized tree.\n * UrlTree is a data structure that provides a lot of affordances in dealing with URLs\n *\n * @usageNotes\n * ### Example\n *\n * ```\n * @Component({templateUrl:'template.html'})\n * class MyComponent {\n *   constructor(router: Router) {\n *     const tree: UrlTree =\n *       router.parseUrl('/team/33/(user/victor//support:help)?debug=true#fragment');\n *     const f = tree.fragment; // return 'fragment'\n *     const q = tree.queryParams; // returns {debug: 'true'}\n *     const g: UrlSegmentGroup = tree.root.children[PRIMARY_OUTLET];\n *     const s: UrlSegment[] = g.segments; // returns 2 segments 'team' and '33'\n *     g.children[PRIMARY_OUTLET].segments; // returns 2 segments 'user' and 'victor'\n *     g.children['support'].segments; // return 1 segment 'help'\n *   }\n * }\n * ```\n *\n * @publicApi\n */\nexport class UrlTree {\n  /** @internal */\n  // TODO(issue/24571): remove '!'.\n  _queryParamMap!: ParamMap;\n\n  /** @internal */\n  constructor(\n      /** The root segment group of the URL tree */\n      public root: UrlSegmentGroup,\n      /** The query params of the URL */\n      public queryParams: Params,\n      /** The fragment of the URL */\n      public fragment: string|null) {}\n\n  get queryParamMap(): ParamMap {\n    if (!this._queryParamMap) {\n      this._queryParamMap = convertToParamMap(this.queryParams);\n    }\n    return this._queryParamMap;\n  }\n\n  /** @docsNotRequired */\n  toString(): string {\n    return DEFAULT_SERIALIZER.serialize(this);\n  }\n}\n\n/**\n * @description\n *\n * Represents the parsed URL segment group.\n *\n * See `UrlTree` for more information.\n *\n * @publicApi\n */\nexport class UrlSegmentGroup {\n  /** @internal */\n  // TODO(issue/24571): remove '!'.\n  _sourceSegment!: UrlSegmentGroup;\n  /** @internal */\n  // TODO(issue/24571): remove '!'.\n  _segmentIndexShift!: number;\n  /** The parent node in the url tree */\n  parent: UrlSegmentGroup|null = null;\n\n  constructor(\n      /** The URL segments of this group. See `UrlSegment` for more information */\n      public segments: UrlSegment[],\n      /** The list of children of this group */\n      public children: {[key: string]: UrlSegmentGroup}) {\n    forEach(children, (v: any, k: any) => v.parent = this);\n  }\n\n  /** Whether the segment has child segments */\n  hasChildren(): boolean {\n    return this.numberOfChildren > 0;\n  }\n\n  /** Number of child segments */\n  get numberOfChildren(): number {\n    return Object.keys(this.children).length;\n  }\n\n  /** @docsNotRequired */\n  toString(): string {\n    return serializePaths(this);\n  }\n}\n\n\n/**\n * @description\n *\n * Represents a single URL segment.\n *\n * A UrlSegment is a part of a URL between the two slashes. It contains a path and the matrix\n * parameters associated with the segment.\n *\n * @usageNotes\n * ### Example\n *\n * ```\n * @Component({templateUrl:'template.html'})\n * class MyComponent {\n *   constructor(router: Router) {\n *     const tree: UrlTree = router.parseUrl('/team;id=33');\n *     const g: UrlSegmentGroup = tree.root.children[PRIMARY_OUTLET];\n *     const s: UrlSegment[] = g.segments;\n *     s[0].path; // returns 'team'\n *     s[0].parameters; // returns {id: 33}\n *   }\n * }\n * ```\n *\n * @publicApi\n */\nexport class UrlSegment {\n  /** @internal */\n  // TODO(issue/24571): remove '!'.\n  _parameterMap!: ParamMap;\n\n  constructor(\n      /** The path part of a URL segment */\n      public path: string,\n\n      /** The matrix parameters associated with a segment */\n      public parameters: {[name: string]: string}) {}\n\n  get parameterMap() {\n    if (!this._parameterMap) {\n      this._parameterMap = convertToParamMap(this.parameters);\n    }\n    return this._parameterMap;\n  }\n\n  /** @docsNotRequired */\n  toString(): string {\n    return serializePath(this);\n  }\n}\n\nexport function equalSegments(as: UrlSegment[], bs: UrlSegment[]): boolean {\n  return equalPath(as, bs) && as.every((a, i) => shallowEqual(a.parameters, bs[i].parameters));\n}\n\nexport function equalPath(as: UrlSegment[], bs: UrlSegment[]): boolean {\n  if (as.length !== bs.length) return false;\n  return as.every((a, i) => a.path === bs[i].path);\n}\n\nexport function mapChildrenIntoArray<T>(\n    segment: UrlSegmentGroup, fn: (v: UrlSegmentGroup, k: string) => T[]): T[] {\n  let res: T[] = [];\n  forEach(segment.children, (child: UrlSegmentGroup, childOutlet: string) => {\n    if (childOutlet === PRIMARY_OUTLET) {\n      res = res.concat(fn(child, childOutlet));\n    }\n  });\n  forEach(segment.children, (child: UrlSegmentGroup, childOutlet: string) => {\n    if (childOutlet !== PRIMARY_OUTLET) {\n      res = res.concat(fn(child, childOutlet));\n    }\n  });\n  return res;\n}\n\n\n/**\n * @description\n *\n * Serializes and deserializes a URL string into a URL tree.\n *\n * The url serialization strategy is customizable. You can\n * make all URLs case insensitive by providing a custom UrlSerializer.\n *\n * See `DefaultUrlSerializer` for an example of a URL serializer.\n *\n * @publicApi\n */\nexport abstract class UrlSerializer {\n  /** Parse a url into a `UrlTree` */\n  abstract parse(url: string): UrlTree;\n\n  /** Converts a `UrlTree` into a url */\n  abstract serialize(tree: UrlTree): string;\n}\n\n/**\n * @description\n *\n * A default implementation of the `UrlSerializer`.\n *\n * Example URLs:\n *\n * ```\n * /inbox/33(popup:compose)\n * /inbox/33;open=true/messages/44\n * ```\n *\n * DefaultUrlSerializer uses parentheses to serialize secondary segments (e.g., popup:compose), the\n * colon syntax to specify the outlet, and the ';parameter=value' syntax (e.g., open=true) to\n * specify route specific parameters.\n *\n * @publicApi\n */\nexport class DefaultUrlSerializer implements UrlSerializer {\n  /** Parses a url into a `UrlTree` */\n  parse(url: string): UrlTree {\n    const p = new UrlParser(url);\n    return new UrlTree(p.parseRootSegment(), p.parseQueryParams(), p.parseFragment());\n  }\n\n  /** Converts a `UrlTree` into a url */\n  serialize(tree: UrlTree): string {\n    const segment = `/${serializeSegment(tree.root, true)}`;\n    const query = serializeQueryParams(tree.queryParams);\n    const fragment =\n        typeof tree.fragment === `string` ? `#${encodeUriFragment(tree.fragment!)}` : '';\n\n    return `${segment}${query}${fragment}`;\n  }\n}\n\nconst DEFAULT_SERIALIZER = new DefaultUrlSerializer();\n\nexport function serializePaths(segment: UrlSegmentGroup): string {\n  return segment.segments.map(p => serializePath(p)).join('/');\n}\n\nfunction serializeSegment(segment: UrlSegmentGroup, root: boolean): string {\n  if (!segment.hasChildren()) {\n    return serializePaths(segment);\n  }\n\n  if (root) {\n    const primary = segment.children[PRIMARY_OUTLET] ?\n        serializeSegment(segment.children[PRIMARY_OUTLET], false) :\n        '';\n    const children: string[] = [];\n\n    forEach(segment.children, (v: UrlSegmentGroup, k: string) => {\n      if (k !== PRIMARY_OUTLET) {\n        children.push(`${k}:${serializeSegment(v, false)}`);\n      }\n    });\n\n    return children.length > 0 ? `${primary}(${children.join('//')})` : primary;\n\n  } else {\n    const children = mapChildrenIntoArray(segment, (v: UrlSegmentGroup, k: string) => {\n      if (k === PRIMARY_OUTLET) {\n        return [serializeSegment(segment.children[PRIMARY_OUTLET], false)];\n      }\n\n      return [`${k}:${serializeSegment(v, false)}`];\n    });\n\n    // use no parenthesis if the only child is a primary outlet route\n    if (Object.keys(segment.children).length === 1 && segment.children[PRIMARY_OUTLET] != null) {\n      return `${serializePaths(segment)}/${children[0]}`;\n    }\n\n    return `${serializePaths(segment)}/(${children.join('//')})`;\n  }\n}\n\n/**\n * Encodes a URI string with the default encoding. This function will only ever be called from\n * `encodeUriQuery` or `encodeUriSegment` as it's the base set of encodings to be used. We need\n * a custom encoding because encodeURIComponent is too aggressive and encodes stuff that doesn't\n * have to be encoded per https://url.spec.whatwg.org.\n */\nfunction encodeUriString(s: string): string {\n  return encodeURIComponent(s)\n      .replace(/%40/g, '@')\n      .replace(/%3A/gi, ':')\n      .replace(/%24/g, '$')\n      .replace(/%2C/gi, ',');\n}\n\n/**\n * This function should be used to encode both keys and values in a query string key/value. In\n * the following URL, you need to call encodeUriQuery on \"k\" and \"v\":\n *\n * http://www.site.org/html;mk=mv?k=v#f\n */\nexport function encodeUriQuery(s: string): string {\n  return encodeUriString(s).replace(/%3B/gi, ';');\n}\n\n/**\n * This function should be used to encode a URL fragment. In the following URL, you need to call\n * encodeUriFragment on \"f\":\n *\n * http://www.site.org/html;mk=mv?k=v#f\n */\nexport function encodeUriFragment(s: string): string {\n  return encodeURI(s);\n}\n\n/**\n * This function should be run on any URI segment as well as the key and value in a key/value\n * pair for matrix params. In the following URL, you need to call encodeUriSegment on \"html\",\n * \"mk\", and \"mv\":\n *\n * http://www.site.org/html;mk=mv?k=v#f\n */\nexport function encodeUriSegment(s: string): string {\n  return encodeUriString(s).replace(/\\(/g, '%28').replace(/\\)/g, '%29').replace(/%26/gi, '&');\n}\n\nexport function decode(s: string): string {\n  return decodeURIComponent(s);\n}\n\n// Query keys/values should have the \"+\" replaced first, as \"+\" in a query string is \" \".\n// decodeURIComponent function will not decode \"+\" as a space.\nexport function decodeQuery(s: string): string {\n  return decode(s.replace(/\\+/g, '%20'));\n}\n\nexport function serializePath(path: UrlSegment): string {\n  return `${encodeUriSegment(path.path)}${serializeMatrixParams(path.parameters)}`;\n}\n\nfunction serializeMatrixParams(params: {[key: string]: string}): string {\n  return Object.keys(params)\n      .map(key => `;${encodeUriSegment(key)}=${encodeUriSegment(params[key])}`)\n      .join('');\n}\n\nfunction serializeQueryParams(params: {[key: string]: any}): string {\n  const strParams: string[] = Object.keys(params).map((name) => {\n    const value = params[name];\n    return Array.isArray(value) ?\n        value.map(v => `${encodeUriQuery(name)}=${encodeUriQuery(v)}`).join('&') :\n        `${encodeUriQuery(name)}=${encodeUriQuery(value)}`;\n  });\n\n  return strParams.length ? `?${strParams.join('&')}` : '';\n}\n\nconst SEGMENT_RE = /^[^\\/()?;=#]+/;\nfunction matchSegments(str: string): string {\n  const match = str.match(SEGMENT_RE);\n  return match ? match[0] : '';\n}\n\nconst QUERY_PARAM_RE = /^[^=?&#]+/;\n// Return the name of the query param at the start of the string or an empty string\nfunction matchQueryParams(str: string): string {\n  const match = str.match(QUERY_PARAM_RE);\n  return match ? match[0] : '';\n}\n\nconst QUERY_PARAM_VALUE_RE = /^[^?&#]+/;\n// Return the value of the query param at the start of the string or an empty string\nfunction matchUrlQueryParamValue(str: string): string {\n  const match = str.match(QUERY_PARAM_VALUE_RE);\n  return match ? match[0] : '';\n}\n\nclass UrlParser {\n  private remaining: string;\n\n  constructor(private url: string) {\n    this.remaining = url;\n  }\n\n  parseRootSegment(): UrlSegmentGroup {\n    this.consumeOptional('/');\n\n    if (this.remaining === '' || this.peekStartsWith('?') || this.peekStartsWith('#')) {\n      return new UrlSegmentGroup([], {});\n    }\n\n    // The root segment group never has segments\n    return new UrlSegmentGroup([], this.parseChildren());\n  }\n\n  parseQueryParams(): Params {\n    const params: Params = {};\n    if (this.consumeOptional('?')) {\n      do {\n        this.parseQueryParam(params);\n      } while (this.consumeOptional('&'));\n    }\n    return params;\n  }\n\n  parseFragment(): string|null {\n    return this.consumeOptional('#') ? decodeURIComponent(this.remaining) : null;\n  }\n\n  private parseChildren(): {[outlet: string]: UrlSegmentGroup} {\n    if (this.remaining === '') {\n      return {};\n    }\n\n    this.consumeOptional('/');\n\n    const segments: UrlSegment[] = [];\n    if (!this.peekStartsWith('(')) {\n      segments.push(this.parseSegment());\n    }\n\n    while (this.peekStartsWith('/') && !this.peekStartsWith('//') && !this.peekStartsWith('/(')) {\n      this.capture('/');\n      segments.push(this.parseSegment());\n    }\n\n    let children: {[outlet: string]: UrlSegmentGroup} = {};\n    if (this.peekStartsWith('/(')) {\n      this.capture('/');\n      children = this.parseParens(true);\n    }\n\n    let res: {[outlet: string]: UrlSegmentGroup} = {};\n    if (this.peekStartsWith('(')) {\n      res = this.parseParens(false);\n    }\n\n    if (segments.length > 0 || Object.keys(children).length > 0) {\n      res[PRIMARY_OUTLET] = new UrlSegmentGroup(segments, children);\n    }\n\n    return res;\n  }\n\n  // parse a segment with its matrix parameters\n  // ie `name;k1=v1;k2`\n  private parseSegment(): UrlSegment {\n    const path = matchSegments(this.remaining);\n    if (path === '' && this.peekStartsWith(';')) {\n      throw new Error(`Empty path url segment cannot have parameters: '${this.remaining}'.`);\n    }\n\n    this.capture(path);\n    return new UrlSegment(decode(path), this.parseMatrixParams());\n  }\n\n  private parseMatrixParams(): {[key: string]: any} {\n    const params: {[key: string]: any} = {};\n    while (this.consumeOptional(';')) {\n      this.parseParam(params);\n    }\n    return params;\n  }\n\n  private parseParam(params: {[key: string]: any}): void {\n    const key = matchSegments(this.remaining);\n    if (!key) {\n      return;\n    }\n    this.capture(key);\n    let value: any = '';\n    if (this.consumeOptional('=')) {\n      const valueMatch = matchSegments(this.remaining);\n      if (valueMatch) {\n        value = valueMatch;\n        this.capture(value);\n      }\n    }\n\n    params[decode(key)] = decode(value);\n  }\n\n  // Parse a single query parameter `name[=value]`\n  private parseQueryParam(params: Params): void {\n    const key = matchQueryParams(this.remaining);\n    if (!key) {\n      return;\n    }\n    this.capture(key);\n    let value: any = '';\n    if (this.consumeOptional('=')) {\n      const valueMatch = matchUrlQueryParamValue(this.remaining);\n      if (valueMatch) {\n        value = valueMatch;\n        this.capture(value);\n      }\n    }\n\n    const decodedKey = decodeQuery(key);\n    const decodedVal = decodeQuery(value);\n\n    if (params.hasOwnProperty(decodedKey)) {\n      // Append to existing values\n      let currentVal = params[decodedKey];\n      if (!Array.isArray(currentVal)) {\n        currentVal = [currentVal];\n        params[decodedKey] = currentVal;\n      }\n      currentVal.push(decodedVal);\n    } else {\n      // Create a new value\n      params[decodedKey] = decodedVal;\n    }\n  }\n\n  // parse `(a/b//outlet_name:c/d)`\n  private parseParens(allowPrimary: boolean): {[outlet: string]: UrlSegmentGroup} {\n    const segments: {[key: string]: UrlSegmentGroup} = {};\n    this.capture('(');\n\n    while (!this.consumeOptional(')') && this.remaining.length > 0) {\n      const path = matchSegments(this.remaining);\n\n      const next = this.remaining[path.length];\n\n      // if is is not one of these characters, then the segment was unescaped\n      // or the group was not closed\n      if (next !== '/' && next !== ')' && next !== ';') {\n        throw new Error(`Cannot parse url '${this.url}'`);\n      }\n\n      let outletName: string = undefined!;\n      if (path.indexOf(':') > -1) {\n        outletName = path.substr(0, path.indexOf(':'));\n        this.capture(outletName);\n        this.capture(':');\n      } else if (allowPrimary) {\n        outletName = PRIMARY_OUTLET;\n      }\n\n      const children = this.parseChildren();\n      segments[outletName] = Object.keys(children).length === 1 ? children[PRIMARY_OUTLET] :\n                                                                  new UrlSegmentGroup([], children);\n      this.consumeOptional('//');\n    }\n\n    return segments;\n  }\n\n  private peekStartsWith(str: string): boolean {\n    return this.remaining.startsWith(str);\n  }\n\n  // Consumes the prefix when it is present and returns whether it has been consumed\n  private consumeOptional(str: string): boolean {\n    if (this.peekStartsWith(str)) {\n      this.remaining = this.remaining.substring(str.length);\n      return true;\n    }\n    return false;\n  }\n\n  private capture(str: string): void {\n    if (!this.consumeOptional(str)) {\n      throw new Error(`Expected \"${str}\".`);\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport class Tree<T> {\n  /** @internal */\n  _root: TreeNode<T>;\n\n  constructor(root: TreeNode<T>) {\n    this._root = root;\n  }\n\n  get root(): T {\n    return this._root.value;\n  }\n\n  /**\n   * @internal\n   */\n  parent(t: T): T|null {\n    const p = this.pathFromRoot(t);\n    return p.length > 1 ? p[p.length - 2] : null;\n  }\n\n  /**\n   * @internal\n   */\n  children(t: T): T[] {\n    const n = findNode(t, this._root);\n    return n ? n.children.map(t => t.value) : [];\n  }\n\n  /**\n   * @internal\n   */\n  firstChild(t: T): T|null {\n    const n = findNode(t, this._root);\n    return n && n.children.length > 0 ? n.children[0].value : null;\n  }\n\n  /**\n   * @internal\n   */\n  siblings(t: T): T[] {\n    const p = findPath(t, this._root);\n    if (p.length < 2) return [];\n\n    const c = p[p.length - 2].children.map(c => c.value);\n    return c.filter(cc => cc !== t);\n  }\n\n  /**\n   * @internal\n   */\n  pathFromRoot(t: T): T[] {\n    return findPath(t, this._root).map(s => s.value);\n  }\n}\n\n\n// DFS for the node matching the value\nfunction findNode<T>(value: T, node: TreeNode<T>): TreeNode<T>|null {\n  if (value === node.value) return node;\n\n  for (const child of node.children) {\n    const node = findNode(value, child);\n    if (node) return node;\n  }\n\n  return null;\n}\n\n// Return the path to the node with the given value using DFS\nfunction findPath<T>(value: T, node: TreeNode<T>): TreeNode<T>[] {\n  if (value === node.value) return [node];\n\n  for (const child of node.children) {\n    const path = findPath(value, child);\n    if (path.length) {\n      path.unshift(node);\n      return path;\n    }\n  }\n\n  return [];\n}\n\nexport class TreeNode<T> {\n  constructor(public value: T, public children: TreeNode<T>[]) {}\n\n  toString(): string {\n    return `TreeNode(${this.value})`;\n  }\n}\n\n// Return the list of T indexed by outlet name\nexport function nodeChildrenAsMap<T extends {outlet: string}>(node: TreeNode<T>|null) {\n  const map: {[outlet: string]: TreeNode<T>} = {};\n\n  if (node) {\n    node.children.forEach(child => map[child.value.outlet] = child);\n  }\n\n  return map;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Type} from '@angular/core';\nimport {BehaviorSubject, Observable} from 'rxjs';\nimport {map} from 'rxjs/operators';\n\nimport {Data, ResolveData, Route} from './config';\nimport {convertToParamMap, ParamMap, Params, PRIMARY_OUTLET} from './shared';\nimport {equalSegments, UrlSegment, UrlSegmentGroup, UrlTree} from './url_tree';\nimport {shallowEqual, shallowEqualArrays} from './utils/collection';\nimport {Tree, TreeNode} from './utils/tree';\n\n\n\n/**\n * Represents the state of the router as a tree of activated routes.\n *\n * @usageNotes\n *\n * Every node in the route tree is an `ActivatedRoute` instance\n * that knows about the \"consumed\" URL segments, the extracted parameters,\n * and the resolved data.\n * Use the `ActivatedRoute` properties to traverse the tree from any node.\n *\n * The following fragment shows how a component gets the root node\n * of the current state to establish its own route tree:\n *\n * ```\n * @Component({templateUrl:'template.html'})\n * class MyComponent {\n *   constructor(router: Router) {\n *     const state: RouterState = router.routerState;\n *     const root: ActivatedRoute = state.root;\n *     const child = root.firstChild;\n *     const id: Observable<string> = child.params.map(p => p.id);\n *     //...\n *   }\n * }\n * ```\n *\n * @see `ActivatedRoute`\n * @see [Getting route information](guide/router#getting-route-information)\n *\n * @publicApi\n */\nexport class RouterState extends Tree<ActivatedRoute> {\n  /** @internal */\n  constructor(\n      root: TreeNode<ActivatedRoute>,\n      /** The current snapshot of the router state */\n      public snapshot: RouterStateSnapshot) {\n    super(root);\n    setRouterState(<RouterState>this, root);\n  }\n\n  toString(): string {\n    return this.snapshot.toString();\n  }\n}\n\nexport function createEmptyState(urlTree: UrlTree, rootComponent: Type<any>|null): RouterState {\n  const snapshot = createEmptyStateSnapshot(urlTree, rootComponent);\n  const emptyUrl = new BehaviorSubject([new UrlSegment('', {})]);\n  const emptyParams = new BehaviorSubject({});\n  const emptyData = new BehaviorSubject({});\n  const emptyQueryParams = new BehaviorSubject({});\n  const fragment = new BehaviorSubject('');\n  const activated = new ActivatedRoute(\n      emptyUrl, emptyParams, emptyQueryParams, fragment, emptyData, PRIMARY_OUTLET, rootComponent,\n      snapshot.root);\n  activated.snapshot = snapshot.root;\n  return new RouterState(new TreeNode<ActivatedRoute>(activated, []), snapshot);\n}\n\nexport function createEmptyStateSnapshot(\n    urlTree: UrlTree, rootComponent: Type<any>|null): RouterStateSnapshot {\n  const emptyParams = {};\n  const emptyData = {};\n  const emptyQueryParams = {};\n  const fragment = '';\n  const activated = new ActivatedRouteSnapshot(\n      [], emptyParams, emptyQueryParams, fragment, emptyData, PRIMARY_OUTLET, rootComponent, null,\n      urlTree.root, -1, {});\n  return new RouterStateSnapshot('', new TreeNode<ActivatedRouteSnapshot>(activated, []));\n}\n\n/**\n * Provides access to information about a route associated with a component\n * that is loaded in an outlet.\n * Use to traverse the `RouterState` tree and extract information from nodes.\n *\n * The following example shows how to construct a component using information from a\n * currently activated route.\n *\n * {@example router/activated-route/module.ts region=\"activated-route\"\n *     header=\"activated-route.component.ts\"}\n *\n * @see [Getting route information](guide/router#getting-route-information)\n *\n * @publicApi\n */\nexport class ActivatedRoute {\n  /** The current snapshot of this route */\n  snapshot!: ActivatedRouteSnapshot;\n  /** @internal */\n  _futureSnapshot: ActivatedRouteSnapshot;\n  /** @internal */\n  _routerState!: RouterState;\n  /** @internal */\n  _paramMap!: Observable<ParamMap>;\n  /** @internal */\n  _queryParamMap!: Observable<ParamMap>;\n\n  /** @internal */\n  constructor(\n      /** An observable of the URL segments matched by this route. */\n      public url: Observable<UrlSegment[]>,\n      /** An observable of the matrix parameters scoped to this route. */\n      public params: Observable<Params>,\n      /** An observable of the query parameters shared by all the routes. */\n      public queryParams: Observable<Params>,\n      /** An observable of the URL fragment shared by all the routes. */\n      public fragment: Observable<string>,\n      /** An observable of the static and resolved data of this route. */\n      public data: Observable<Data>,\n      /** The outlet name of the route, a constant. */\n      public outlet: string,\n      /** The component of the route, a constant. */\n      // TODO(vsavkin): remove |string\n      public component: Type<any>|string|null, futureSnapshot: ActivatedRouteSnapshot) {\n    this._futureSnapshot = futureSnapshot;\n  }\n\n  /** The configuration used to match this route. */\n  get routeConfig(): Route|null {\n    return this._futureSnapshot.routeConfig;\n  }\n\n  /** The root of the router state. */\n  get root(): ActivatedRoute {\n    return this._routerState.root;\n  }\n\n  /** The parent of this route in the router state tree. */\n  get parent(): ActivatedRoute|null {\n    return this._routerState.parent(this);\n  }\n\n  /** The first child of this route in the router state tree. */\n  get firstChild(): ActivatedRoute|null {\n    return this._routerState.firstChild(this);\n  }\n\n  /** The children of this route in the router state tree. */\n  get children(): ActivatedRoute[] {\n    return this._routerState.children(this);\n  }\n\n  /** The path from the root of the router state tree to this route. */\n  get pathFromRoot(): ActivatedRoute[] {\n    return this._routerState.pathFromRoot(this);\n  }\n\n  /**\n   * An Observable that contains a map of the required and optional parameters\n   * specific to the route.\n   * The map supports retrieving single and multiple values from the same parameter.\n   */\n  get paramMap(): Observable<ParamMap> {\n    if (!this._paramMap) {\n      this._paramMap = this.params.pipe(map((p: Params): ParamMap => convertToParamMap(p)));\n    }\n    return this._paramMap;\n  }\n\n  /**\n   * An Observable that contains a map of the query parameters available to all routes.\n   * The map supports retrieving single and multiple values from the query parameter.\n   */\n  get queryParamMap(): Observable<ParamMap> {\n    if (!this._queryParamMap) {\n      this._queryParamMap =\n          this.queryParams.pipe(map((p: Params): ParamMap => convertToParamMap(p)));\n    }\n    return this._queryParamMap;\n  }\n\n  toString(): string {\n    return this.snapshot ? this.snapshot.toString() : `Future(${this._futureSnapshot})`;\n  }\n}\n\nexport type ParamsInheritanceStrategy = 'emptyOnly'|'always';\n\n/** @internal */\nexport type Inherited = {\n  params: Params,\n  data: Data,\n  resolve: Data,\n};\n\n/**\n * Returns the inherited params, data, and resolve for a given route.\n * By default, this only inherits values up to the nearest path-less or component-less route.\n * @internal\n */\nexport function inheritedParamsDataResolve(\n    route: ActivatedRouteSnapshot,\n    paramsInheritanceStrategy: ParamsInheritanceStrategy = 'emptyOnly'): Inherited {\n  const pathFromRoot = route.pathFromRoot;\n\n  let inheritingStartingFrom = 0;\n  if (paramsInheritanceStrategy !== 'always') {\n    inheritingStartingFrom = pathFromRoot.length - 1;\n\n    while (inheritingStartingFrom >= 1) {\n      const current = pathFromRoot[inheritingStartingFrom];\n      const parent = pathFromRoot[inheritingStartingFrom - 1];\n      // current route is an empty path => inherits its parent's params and data\n      if (current.routeConfig && current.routeConfig.path === '') {\n        inheritingStartingFrom--;\n\n        // parent is componentless => current route should inherit its params and data\n      } else if (!parent.component) {\n        inheritingStartingFrom--;\n\n      } else {\n        break;\n      }\n    }\n  }\n\n  return flattenInherited(pathFromRoot.slice(inheritingStartingFrom));\n}\n\n/** @internal */\nfunction flattenInherited(pathFromRoot: ActivatedRouteSnapshot[]): Inherited {\n  return pathFromRoot.reduce((res, curr) => {\n    const params = {...res.params, ...curr.params};\n    const data = {...res.data, ...curr.data};\n    const resolve = {...res.resolve, ...curr._resolvedData};\n    return {params, data, resolve};\n  }, <any>{params: {}, data: {}, resolve: {}});\n}\n\n/**\n * @description\n *\n * Contains the information about a route associated with a component loaded in an\n * outlet at a particular moment in time. ActivatedRouteSnapshot can also be used to\n * traverse the router state tree.\n *\n * The following example initializes a component with route information extracted\n * from the snapshot of the root node at the time of creation.\n *\n * ```\n * @Component({templateUrl:'./my-component.html'})\n * class MyComponent {\n *   constructor(route: ActivatedRoute) {\n *     const id: string = route.snapshot.params.id;\n *     const url: string = route.snapshot.url.join('');\n *     const user = route.snapshot.data.user;\n *   }\n * }\n * ```\n *\n * @publicApi\n */\nexport class ActivatedRouteSnapshot {\n  /** The configuration used to match this route **/\n  public readonly routeConfig: Route|null;\n  /** @internal **/\n  _urlSegment: UrlSegmentGroup;\n  /** @internal */\n  _lastPathIndex: number;\n  /** @internal */\n  _resolve: ResolveData;\n  /** @internal */\n  // TODO(issue/24571): remove '!'.\n  _resolvedData!: Data;\n  /** @internal */\n  // TODO(issue/24571): remove '!'.\n  _routerState!: RouterStateSnapshot;\n  /** @internal */\n  // TODO(issue/24571): remove '!'.\n  _paramMap!: ParamMap;\n  /** @internal */\n  // TODO(issue/24571): remove '!'.\n  _queryParamMap!: ParamMap;\n\n  /** @internal */\n  constructor(\n      /** The URL segments matched by this route */\n      public url: UrlSegment[],\n      /** The matrix parameters scoped to this route */\n      public params: Params,\n      /** The query parameters shared by all the routes */\n      public queryParams: Params,\n      /** The URL fragment shared by all the routes */\n      public fragment: string,\n      /** The static and resolved data of this route */\n      public data: Data,\n      /** The outlet name of the route */\n      public outlet: string,\n      /** The component of the route */\n      public component: Type<any>|string|null, routeConfig: Route|null, urlSegment: UrlSegmentGroup,\n      lastPathIndex: number, resolve: ResolveData) {\n    this.routeConfig = routeConfig;\n    this._urlSegment = urlSegment;\n    this._lastPathIndex = lastPathIndex;\n    this._resolve = resolve;\n  }\n\n  /** The root of the router state */\n  get root(): ActivatedRouteSnapshot {\n    return this._routerState.root;\n  }\n\n  /** The parent of this route in the router state tree */\n  get parent(): ActivatedRouteSnapshot|null {\n    return this._routerState.parent(this);\n  }\n\n  /** The first child of this route in the router state tree */\n  get firstChild(): ActivatedRouteSnapshot|null {\n    return this._routerState.firstChild(this);\n  }\n\n  /** The children of this route in the router state tree */\n  get children(): ActivatedRouteSnapshot[] {\n    return this._routerState.children(this);\n  }\n\n  /** The path from the root of the router state tree to this route */\n  get pathFromRoot(): ActivatedRouteSnapshot[] {\n    return this._routerState.pathFromRoot(this);\n  }\n\n  get paramMap(): ParamMap {\n    if (!this._paramMap) {\n      this._paramMap = convertToParamMap(this.params);\n    }\n    return this._paramMap;\n  }\n\n  get queryParamMap(): ParamMap {\n    if (!this._queryParamMap) {\n      this._queryParamMap = convertToParamMap(this.queryParams);\n    }\n    return this._queryParamMap;\n  }\n\n  toString(): string {\n    const url = this.url.map(segment => segment.toString()).join('/');\n    const matched = this.routeConfig ? this.routeConfig.path : '';\n    return `Route(url:'${url}', path:'${matched}')`;\n  }\n}\n\n/**\n * @description\n *\n * Represents the state of the router at a moment in time.\n *\n * This is a tree of activated route snapshots. Every node in this tree knows about\n * the \"consumed\" URL segments, the extracted parameters, and the resolved data.\n *\n * The following example shows how a component is initialized with information\n * from the snapshot of the root node's state at the time of creation.\n *\n * ```\n * @Component({templateUrl:'template.html'})\n * class MyComponent {\n *   constructor(router: Router) {\n *     const state: RouterState = router.routerState;\n *     const snapshot: RouterStateSnapshot = state.snapshot;\n *     const root: ActivatedRouteSnapshot = snapshot.root;\n *     const child = root.firstChild;\n *     const id: Observable<string> = child.params.map(p => p.id);\n *     //...\n *   }\n * }\n * ```\n *\n * @publicApi\n */\nexport class RouterStateSnapshot extends Tree<ActivatedRouteSnapshot> {\n  /** @internal */\n  constructor(\n      /** The url from which this snapshot was created */\n      public url: string, root: TreeNode<ActivatedRouteSnapshot>) {\n    super(root);\n    setRouterState(<RouterStateSnapshot>this, root);\n  }\n\n  toString(): string {\n    return serializeNode(this._root);\n  }\n}\n\nfunction setRouterState<U, T extends {_routerState: U}>(state: U, node: TreeNode<T>): void {\n  node.value._routerState = state;\n  node.children.forEach(c => setRouterState(state, c));\n}\n\nfunction serializeNode(node: TreeNode<ActivatedRouteSnapshot>): string {\n  const c = node.children.length > 0 ? ` { ${node.children.map(serializeNode).join(', ')} } ` : '';\n  return `${node.value}${c}`;\n}\n\n/**\n * The expectation is that the activate route is created with the right set of parameters.\n * So we push new values into the observables only when they are not the initial values.\n * And we detect that by checking if the snapshot field is set.\n */\nexport function advanceActivatedRoute(route: ActivatedRoute): void {\n  if (route.snapshot) {\n    const currentSnapshot = route.snapshot;\n    const nextSnapshot = route._futureSnapshot;\n    route.snapshot = nextSnapshot;\n    if (!shallowEqual(currentSnapshot.queryParams, nextSnapshot.queryParams)) {\n      (<any>route.queryParams).next(nextSnapshot.queryParams);\n    }\n    if (currentSnapshot.fragment !== nextSnapshot.fragment) {\n      (<any>route.fragment).next(nextSnapshot.fragment);\n    }\n    if (!shallowEqual(currentSnapshot.params, nextSnapshot.params)) {\n      (<any>route.params).next(nextSnapshot.params);\n    }\n    if (!shallowEqualArrays(currentSnapshot.url, nextSnapshot.url)) {\n      (<any>route.url).next(nextSnapshot.url);\n    }\n    if (!shallowEqual(currentSnapshot.data, nextSnapshot.data)) {\n      (<any>route.data).next(nextSnapshot.data);\n    }\n  } else {\n    route.snapshot = route._futureSnapshot;\n\n    // this is for resolved data\n    (<any>route.data).next(route._futureSnapshot.data);\n  }\n}\n\n\nexport function equalParamsAndUrlSegments(\n    a: ActivatedRouteSnapshot, b: ActivatedRouteSnapshot): boolean {\n  const equalUrlParams = shallowEqual(a.params, b.params) && equalSegments(a.url, b.url);\n  const parentsMismatch = !a.parent !== !b.parent;\n\n  return equalUrlParams && !parentsMismatch &&\n      (!a.parent || equalParamsAndUrlSegments(a.parent, b.parent!));\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {BehaviorSubject} from 'rxjs';\n\nimport {DetachedRouteHandleInternal, RouteReuseStrategy} from './route_reuse_strategy';\nimport {ActivatedRoute, ActivatedRouteSnapshot, RouterState, RouterStateSnapshot} from './router_state';\nimport {TreeNode} from './utils/tree';\n\nexport function createRouterState(\n    routeReuseStrategy: RouteReuseStrategy, curr: RouterStateSnapshot,\n    prevState: RouterState): RouterState {\n  const root = createNode(routeReuseStrategy, curr._root, prevState ? prevState._root : undefined);\n  return new RouterState(root, curr);\n}\n\nfunction createNode(\n    routeReuseStrategy: RouteReuseStrategy, curr: TreeNode<ActivatedRouteSnapshot>,\n    prevState?: TreeNode<ActivatedRoute>): TreeNode<ActivatedRoute> {\n  // reuse an activated route that is currently displayed on the screen\n  if (prevState && routeReuseStrategy.shouldReuseRoute(curr.value, prevState.value.snapshot)) {\n    const value = prevState.value;\n    value._futureSnapshot = curr.value;\n    const children = createOrReuseChildren(routeReuseStrategy, curr, prevState);\n    return new TreeNode<ActivatedRoute>(value, children);\n\n    // retrieve an activated route that is used to be displayed, but is not currently displayed\n  } else {\n    const detachedRouteHandle =\n        <DetachedRouteHandleInternal>routeReuseStrategy.retrieve(curr.value);\n    if (detachedRouteHandle) {\n      const tree: TreeNode<ActivatedRoute> = detachedRouteHandle.route;\n      setFutureSnapshotsOfActivatedRoutes(curr, tree);\n      return tree;\n\n    } else {\n      const value = createActivatedRoute(curr.value);\n      const children = curr.children.map(c => createNode(routeReuseStrategy, c));\n      return new TreeNode<ActivatedRoute>(value, children);\n    }\n  }\n}\n\nfunction setFutureSnapshotsOfActivatedRoutes(\n    curr: TreeNode<ActivatedRouteSnapshot>, result: TreeNode<ActivatedRoute>): void {\n  if (curr.value.routeConfig !== result.value.routeConfig) {\n    throw new Error('Cannot reattach ActivatedRouteSnapshot created from a different route');\n  }\n  if (curr.children.length !== result.children.length) {\n    throw new Error('Cannot reattach ActivatedRouteSnapshot with a different number of children');\n  }\n  result.value._futureSnapshot = curr.value;\n  for (let i = 0; i < curr.children.length; ++i) {\n    setFutureSnapshotsOfActivatedRoutes(curr.children[i], result.children[i]);\n  }\n}\n\nfunction createOrReuseChildren(\n    routeReuseStrategy: RouteReuseStrategy, curr: TreeNode<ActivatedRouteSnapshot>,\n    prevState: TreeNode<ActivatedRoute>) {\n  return curr.children.map(child => {\n    for (const p of prevState.children) {\n      if (routeReuseStrategy.shouldReuseRoute(p.value.snapshot, child.value)) {\n        return createNode(routeReuseStrategy, child, p);\n      }\n    }\n    return createNode(routeReuseStrategy, child);\n  });\n}\n\nfunction createActivatedRoute(c: ActivatedRouteSnapshot) {\n  return new ActivatedRoute(\n      new BehaviorSubject(c.url), new BehaviorSubject(c.params), new BehaviorSubject(c.queryParams),\n      new BehaviorSubject(c.fragment), new BehaviorSubject(c.data), c.outlet, c.component, c);\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ActivatedRoute} from './router_state';\nimport {Params, PRIMARY_OUTLET} from './shared';\nimport {UrlSegment, UrlSegmentGroup, UrlTree} from './url_tree';\nimport {forEach, last, shallowEqual} from './utils/collection';\n\nexport function createUrlTree(\n    route: ActivatedRoute, urlTree: UrlTree, commands: any[], queryParams: Params,\n    fragment: string): UrlTree {\n  if (commands.length === 0) {\n    return tree(urlTree.root, urlTree.root, urlTree, queryParams, fragment);\n  }\n\n  const nav = computeNavigation(commands);\n\n  if (nav.toRoot()) {\n    return tree(urlTree.root, new UrlSegmentGroup([], {}), urlTree, queryParams, fragment);\n  }\n\n  const startingPosition = findStartingPosition(nav, urlTree, route);\n\n  const segmentGroup = startingPosition.processChildren ?\n      updateSegmentGroupChildren(\n          startingPosition.segmentGroup, startingPosition.index, nav.commands) :\n      updateSegmentGroup(startingPosition.segmentGroup, startingPosition.index, nav.commands);\n  return tree(startingPosition.segmentGroup, segmentGroup, urlTree, queryParams, fragment);\n}\n\nfunction isMatrixParams(command: any): boolean {\n  return typeof command === 'object' && command != null && !command.outlets && !command.segmentPath;\n}\n\nfunction tree(\n    oldSegmentGroup: UrlSegmentGroup, newSegmentGroup: UrlSegmentGroup, urlTree: UrlTree,\n    queryParams: Params, fragment: string): UrlTree {\n  let qp: any = {};\n  if (queryParams) {\n    forEach(queryParams, (value: any, name: any) => {\n      qp[name] = Array.isArray(value) ? value.map((v: any) => `${v}`) : `${value}`;\n    });\n  }\n\n  if (urlTree.root === oldSegmentGroup) {\n    return new UrlTree(newSegmentGroup, qp, fragment);\n  }\n\n  return new UrlTree(replaceSegment(urlTree.root, oldSegmentGroup, newSegmentGroup), qp, fragment);\n}\n\nfunction replaceSegment(\n    current: UrlSegmentGroup, oldSegment: UrlSegmentGroup,\n    newSegment: UrlSegmentGroup): UrlSegmentGroup {\n  const children: {[key: string]: UrlSegmentGroup} = {};\n  forEach(current.children, (c: UrlSegmentGroup, outletName: string) => {\n    if (c === oldSegment) {\n      children[outletName] = newSegment;\n    } else {\n      children[outletName] = replaceSegment(c, oldSegment, newSegment);\n    }\n  });\n  return new UrlSegmentGroup(current.segments, children);\n}\n\nclass Navigation {\n  constructor(\n      public isAbsolute: boolean, public numberOfDoubleDots: number, public commands: any[]) {\n    if (isAbsolute && commands.length > 0 && isMatrixParams(commands[0])) {\n      throw new Error('Root segment cannot have matrix parameters');\n    }\n\n    const cmdWithOutlet = commands.find(c => typeof c === 'object' && c != null && c.outlets);\n    if (cmdWithOutlet && cmdWithOutlet !== last(commands)) {\n      throw new Error('{outlets:{}} has to be the last command');\n    }\n  }\n\n  public toRoot(): boolean {\n    return this.isAbsolute && this.commands.length === 1 && this.commands[0] == '/';\n  }\n}\n\n/** Transforms commands to a normalized `Navigation` */\nfunction computeNavigation(commands: any[]): Navigation {\n  if ((typeof commands[0] === 'string') && commands.length === 1 && commands[0] === '/') {\n    return new Navigation(true, 0, commands);\n  }\n\n  let numberOfDoubleDots = 0;\n  let isAbsolute = false;\n\n  const res: any[] = commands.reduce((res, cmd, cmdIdx) => {\n    if (typeof cmd === 'object' && cmd != null) {\n      if (cmd.outlets) {\n        const outlets: {[k: string]: any} = {};\n        forEach(cmd.outlets, (commands: any, name: string) => {\n          outlets[name] = typeof commands === 'string' ? commands.split('/') : commands;\n        });\n        return [...res, {outlets}];\n      }\n\n      if (cmd.segmentPath) {\n        return [...res, cmd.segmentPath];\n      }\n    }\n\n    if (!(typeof cmd === 'string')) {\n      return [...res, cmd];\n    }\n\n    if (cmdIdx === 0) {\n      cmd.split('/').forEach((urlPart, partIndex) => {\n        if (partIndex == 0 && urlPart === '.') {\n          // skip './a'\n        } else if (partIndex == 0 && urlPart === '') {  //  '/a'\n          isAbsolute = true;\n        } else if (urlPart === '..') {  //  '../a'\n          numberOfDoubleDots++;\n        } else if (urlPart != '') {\n          res.push(urlPart);\n        }\n      });\n\n      return res;\n    }\n\n    return [...res, cmd];\n  }, []);\n\n  return new Navigation(isAbsolute, numberOfDoubleDots, res);\n}\n\nclass Position {\n  constructor(\n      public segmentGroup: UrlSegmentGroup, public processChildren: boolean, public index: number) {\n  }\n}\n\nfunction findStartingPosition(nav: Navigation, tree: UrlTree, route: ActivatedRoute): Position {\n  if (nav.isAbsolute) {\n    return new Position(tree.root, true, 0);\n  }\n\n  if (route.snapshot._lastPathIndex === -1) {\n    const segmentGroup = route.snapshot._urlSegment;\n    // Pathless ActivatedRoute has _lastPathIndex === -1 but should not process children\n    // see issue #26224, #13011, #35687\n    // However, if the ActivatedRoute is the root we should process children like above.\n    const processChildren = segmentGroup === tree.root;\n    return new Position(segmentGroup, processChildren, 0);\n  }\n\n  const modifier = isMatrixParams(nav.commands[0]) ? 0 : 1;\n  const index = route.snapshot._lastPathIndex + modifier;\n  return createPositionApplyingDoubleDots(\n      route.snapshot._urlSegment, index, nav.numberOfDoubleDots);\n}\n\nfunction createPositionApplyingDoubleDots(\n    group: UrlSegmentGroup, index: number, numberOfDoubleDots: number): Position {\n  let g = group;\n  let ci = index;\n  let dd = numberOfDoubleDots;\n  while (dd > ci) {\n    dd -= ci;\n    g = g.parent!;\n    if (!g) {\n      throw new Error('Invalid number of \\'../\\'');\n    }\n    ci = g.segments.length;\n  }\n  return new Position(g, false, ci - dd);\n}\n\nfunction getPath(command: any): any {\n  if (typeof command === 'object' && command != null && command.outlets) {\n    return command.outlets[PRIMARY_OUTLET];\n  }\n  return `${command}`;\n}\n\nfunction getOutlets(commands: any[]): {[k: string]: any[]} {\n  if (typeof commands[0] === 'object' && commands[0] !== null && commands[0].outlets) {\n    return commands[0].outlets;\n  }\n\n  return {[PRIMARY_OUTLET]: commands};\n}\n\nfunction updateSegmentGroup(\n    segmentGroup: UrlSegmentGroup, startIndex: number, commands: any[]): UrlSegmentGroup {\n  if (!segmentGroup) {\n    segmentGroup = new UrlSegmentGroup([], {});\n  }\n  if (segmentGroup.segments.length === 0 && segmentGroup.hasChildren()) {\n    return updateSegmentGroupChildren(segmentGroup, startIndex, commands);\n  }\n\n  const m = prefixedWith(segmentGroup, startIndex, commands);\n  const slicedCommands = commands.slice(m.commandIndex);\n  if (m.match && m.pathIndex < segmentGroup.segments.length) {\n    const g = new UrlSegmentGroup(segmentGroup.segments.slice(0, m.pathIndex), {});\n    g.children[PRIMARY_OUTLET] =\n        new UrlSegmentGroup(segmentGroup.segments.slice(m.pathIndex), segmentGroup.children);\n    return updateSegmentGroupChildren(g, 0, slicedCommands);\n  } else if (m.match && slicedCommands.length === 0) {\n    return new UrlSegmentGroup(segmentGroup.segments, {});\n  } else if (m.match && !segmentGroup.hasChildren()) {\n    return createNewSegmentGroup(segmentGroup, startIndex, commands);\n  } else if (m.match) {\n    return updateSegmentGroupChildren(segmentGroup, 0, slicedCommands);\n  } else {\n    return createNewSegmentGroup(segmentGroup, startIndex, commands);\n  }\n}\n\nfunction updateSegmentGroupChildren(\n    segmentGroup: UrlSegmentGroup, startIndex: number, commands: any[]): UrlSegmentGroup {\n  if (commands.length === 0) {\n    return new UrlSegmentGroup(segmentGroup.segments, {});\n  } else {\n    const outlets = getOutlets(commands);\n    const children: {[key: string]: UrlSegmentGroup} = {};\n\n    forEach(outlets, (commands: any, outlet: string) => {\n      if (commands !== null) {\n        children[outlet] = updateSegmentGroup(segmentGroup.children[outlet], startIndex, commands);\n      }\n    });\n\n    forEach(segmentGroup.children, (child: UrlSegmentGroup, childOutlet: string) => {\n      if (outlets[childOutlet] === undefined) {\n        children[childOutlet] = child;\n      }\n    });\n    return new UrlSegmentGroup(segmentGroup.segments, children);\n  }\n}\n\nfunction prefixedWith(segmentGroup: UrlSegmentGroup, startIndex: number, commands: any[]) {\n  let currentCommandIndex = 0;\n  let currentPathIndex = startIndex;\n\n  const noMatch = {match: false, pathIndex: 0, commandIndex: 0};\n  while (currentPathIndex < segmentGroup.segments.length) {\n    if (currentCommandIndex >= commands.length) return noMatch;\n    const path = segmentGroup.segments[currentPathIndex];\n    const curr = getPath(commands[currentCommandIndex]);\n    const next =\n        currentCommandIndex < commands.length - 1 ? commands[currentCommandIndex + 1] : null;\n\n    if (currentPathIndex > 0 && curr === undefined) break;\n\n    if (curr && next && (typeof next === 'object') && next.outlets === undefined) {\n      if (!compare(curr, next, path)) return noMatch;\n      currentCommandIndex += 2;\n    } else {\n      if (!compare(curr, {}, path)) return noMatch;\n      currentCommandIndex++;\n    }\n    currentPathIndex++;\n  }\n\n  return {match: true, pathIndex: currentPathIndex, commandIndex: currentCommandIndex};\n}\n\nfunction createNewSegmentGroup(\n    segmentGroup: UrlSegmentGroup, startIndex: number, commands: any[]): UrlSegmentGroup {\n  const paths = segmentGroup.segments.slice(0, startIndex);\n\n  let i = 0;\n  while (i < commands.length) {\n    if (typeof commands[i] === 'object' && commands[i] !== null &&\n        commands[i].outlets !== undefined) {\n      const children = createNewSegmentChildren(commands[i].outlets);\n      return new UrlSegmentGroup(paths, children);\n    }\n\n    // if we start with an object literal, we need to reuse the path part from the segment\n    if (i === 0 && isMatrixParams(commands[0])) {\n      const p = segmentGroup.segments[startIndex];\n      paths.push(new UrlSegment(p.path, commands[0]));\n      i++;\n      continue;\n    }\n\n    const curr = getPath(commands[i]);\n    const next = (i < commands.length - 1) ? commands[i + 1] : null;\n    if (curr && next && isMatrixParams(next)) {\n      paths.push(new UrlSegment(curr, stringify(next)));\n      i += 2;\n    } else {\n      paths.push(new UrlSegment(curr, {}));\n      i++;\n    }\n  }\n  return new UrlSegmentGroup(paths, {});\n}\n\nfunction createNewSegmentChildren(outlets: {[name: string]: any}): any {\n  const children: {[key: string]: UrlSegmentGroup} = {};\n  forEach(outlets, (commands: any, outlet: string) => {\n    if (commands !== null) {\n      children[outlet] = createNewSegmentGroup(new UrlSegmentGroup([], {}), 0, commands);\n    }\n  });\n  return children;\n}\n\nfunction stringify(params: {[key: string]: any}): {[key: string]: string} {\n  const res: {[key: string]: string} = {};\n  forEach(params, (v: any, k: string) => res[k] = `${v}`);\n  return res;\n}\n\nfunction compare(path: string, params: {[key: string]: any}, segment: UrlSegment): boolean {\n  return path == segment.path && shallowEqual(params, segment.parameters);\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {isDevMode} from '@angular/core';\nimport {MonoTypeOperatorFunction} from 'rxjs';\nimport {map} from 'rxjs/operators';\n\nimport {LoadedRouterConfig} from '../config';\nimport {ActivationEnd, ChildActivationEnd, Event} from '../events';\nimport {DetachedRouteHandleInternal, RouteReuseStrategy} from '../route_reuse_strategy';\nimport {NavigationTransition} from '../router';\nimport {ChildrenOutletContexts} from '../router_outlet_context';\nimport {ActivatedRoute, ActivatedRouteSnapshot, advanceActivatedRoute, RouterState} from '../router_state';\nimport {forEach} from '../utils/collection';\nimport {nodeChildrenAsMap, TreeNode} from '../utils/tree';\n\nexport const activateRoutes =\n    (rootContexts: ChildrenOutletContexts, routeReuseStrategy: RouteReuseStrategy,\n     forwardEvent: (evt: Event) => void): MonoTypeOperatorFunction<NavigationTransition> =>\n        map(t => {\n          new ActivateRoutes(\n              routeReuseStrategy, t.targetRouterState!, t.currentRouterState, forwardEvent)\n              .activate(rootContexts);\n          return t;\n        });\n\nexport class ActivateRoutes {\n  constructor(\n      private routeReuseStrategy: RouteReuseStrategy, private futureState: RouterState,\n      private currState: RouterState, private forwardEvent: (evt: Event) => void) {}\n\n  activate(parentContexts: ChildrenOutletContexts): void {\n    const futureRoot = this.futureState._root;\n    const currRoot = this.currState ? this.currState._root : null;\n\n    this.deactivateChildRoutes(futureRoot, currRoot, parentContexts);\n    advanceActivatedRoute(this.futureState.root);\n    this.activateChildRoutes(futureRoot, currRoot, parentContexts);\n  }\n\n  // De-activate the child route that are not re-used for the future state\n  private deactivateChildRoutes(\n      futureNode: TreeNode<ActivatedRoute>, currNode: TreeNode<ActivatedRoute>|null,\n      contexts: ChildrenOutletContexts): void {\n    const children: {[outletName: string]: TreeNode<ActivatedRoute>} = nodeChildrenAsMap(currNode);\n\n    // Recurse on the routes active in the future state to de-activate deeper children\n    futureNode.children.forEach(futureChild => {\n      const childOutletName = futureChild.value.outlet;\n      this.deactivateRoutes(futureChild, children[childOutletName], contexts);\n      delete children[childOutletName];\n    });\n\n    // De-activate the routes that will not be re-used\n    forEach(children, (v: TreeNode<ActivatedRoute>, childName: string) => {\n      this.deactivateRouteAndItsChildren(v, contexts);\n    });\n  }\n\n  private deactivateRoutes(\n      futureNode: TreeNode<ActivatedRoute>, currNode: TreeNode<ActivatedRoute>,\n      parentContext: ChildrenOutletContexts): void {\n    const future = futureNode.value;\n    const curr = currNode ? currNode.value : null;\n\n    if (future === curr) {\n      // Reusing the node, check to see if the children need to be de-activated\n      if (future.component) {\n        // If we have a normal route, we need to go through an outlet.\n        const context = parentContext.getContext(future.outlet);\n        if (context) {\n          this.deactivateChildRoutes(futureNode, currNode, context.children);\n        }\n      } else {\n        // if we have a componentless route, we recurse but keep the same outlet map.\n        this.deactivateChildRoutes(futureNode, currNode, parentContext);\n      }\n    } else {\n      if (curr) {\n        // Deactivate the current route which will not be re-used\n        this.deactivateRouteAndItsChildren(currNode, parentContext);\n      }\n    }\n  }\n\n  private deactivateRouteAndItsChildren(\n      route: TreeNode<ActivatedRoute>, parentContexts: ChildrenOutletContexts): void {\n    if (this.routeReuseStrategy.shouldDetach(route.value.snapshot)) {\n      this.detachAndStoreRouteSubtree(route, parentContexts);\n    } else {\n      this.deactivateRouteAndOutlet(route, parentContexts);\n    }\n  }\n\n  private detachAndStoreRouteSubtree(\n      route: TreeNode<ActivatedRoute>, parentContexts: ChildrenOutletContexts): void {\n    const context = parentContexts.getContext(route.value.outlet);\n    if (context && context.outlet) {\n      const componentRef = context.outlet.detach();\n      const contexts = context.children.onOutletDeactivated();\n      this.routeReuseStrategy.store(route.value.snapshot, {componentRef, route, contexts});\n    }\n  }\n\n  private deactivateRouteAndOutlet(\n      route: TreeNode<ActivatedRoute>, parentContexts: ChildrenOutletContexts): void {\n    const context = parentContexts.getContext(route.value.outlet);\n\n    if (context) {\n      const children: {[outletName: string]: any} = nodeChildrenAsMap(route);\n      const contexts = route.value.component ? context.children : parentContexts;\n\n      forEach(children, (v: any, k: string) => this.deactivateRouteAndItsChildren(v, contexts));\n\n      if (context.outlet) {\n        // Destroy the component\n        context.outlet.deactivate();\n        // Destroy the contexts for all the outlets that were in the component\n        context.children.onOutletDeactivated();\n      }\n    }\n  }\n\n  private activateChildRoutes(\n      futureNode: TreeNode<ActivatedRoute>, currNode: TreeNode<ActivatedRoute>|null,\n      contexts: ChildrenOutletContexts): void {\n    const children: {[outlet: string]: any} = nodeChildrenAsMap(currNode);\n    futureNode.children.forEach(c => {\n      this.activateRoutes(c, children[c.value.outlet], contexts);\n      this.forwardEvent(new ActivationEnd(c.value.snapshot));\n    });\n    if (futureNode.children.length) {\n      this.forwardEvent(new ChildActivationEnd(futureNode.value.snapshot));\n    }\n  }\n\n  private activateRoutes(\n      futureNode: TreeNode<ActivatedRoute>, currNode: TreeNode<ActivatedRoute>,\n      parentContexts: ChildrenOutletContexts): void {\n    const future = futureNode.value;\n    const curr = currNode ? currNode.value : null;\n\n    advanceActivatedRoute(future);\n\n    // reusing the node\n    if (future === curr) {\n      if (future.component) {\n        // If we have a normal route, we need to go through an outlet.\n        const context = parentContexts.getOrCreateContext(future.outlet);\n        this.activateChildRoutes(futureNode, currNode, context.children);\n      } else {\n        // if we have a componentless route, we recurse but keep the same outlet map.\n        this.activateChildRoutes(futureNode, currNode, parentContexts);\n      }\n    } else {\n      if (future.component) {\n        // if we have a normal route, we need to place the component into the outlet and recurse.\n        const context = parentContexts.getOrCreateContext(future.outlet);\n\n        if (this.routeReuseStrategy.shouldAttach(future.snapshot)) {\n          const stored =\n              (<DetachedRouteHandleInternal>this.routeReuseStrategy.retrieve(future.snapshot));\n          this.routeReuseStrategy.store(future.snapshot, null);\n          context.children.onOutletReAttached(stored.contexts);\n          context.attachRef = stored.componentRef;\n          context.route = stored.route.value;\n          if (context.outlet) {\n            // Attach right away when the outlet has already been instantiated\n            // Otherwise attach from `RouterOutlet.ngOnInit` when it is instantiated\n            context.outlet.attach(stored.componentRef, stored.route.value);\n          }\n          advanceActivatedRouteNodeAndItsChildren(stored.route);\n        } else {\n          const config = parentLoadedConfig(future.snapshot);\n          const cmpFactoryResolver = config ? config.module.componentFactoryResolver : null;\n\n          context.attachRef = null;\n          context.route = future;\n          context.resolver = cmpFactoryResolver;\n          if (context.outlet) {\n            // Activate the outlet when it has already been instantiated\n            // Otherwise it will get activated from its `ngOnInit` when instantiated\n            context.outlet.activateWith(future, cmpFactoryResolver);\n          }\n\n          this.activateChildRoutes(futureNode, null, context.children);\n        }\n      } else {\n        // if we have a componentless route, we recurse but keep the same outlet map.\n        this.activateChildRoutes(futureNode, null, parentContexts);\n      }\n    }\n  }\n}\n\nfunction advanceActivatedRouteNodeAndItsChildren(node: TreeNode<ActivatedRoute>): void {\n  advanceActivatedRoute(node.value);\n  node.children.forEach(advanceActivatedRouteNodeAndItsChildren);\n}\n\nfunction parentLoadedConfig(snapshot: ActivatedRouteSnapshot): LoadedRouterConfig|null {\n  for (let s = snapshot.parent; s; s = s.parent) {\n    const route = s.routeConfig;\n    if (route && route._loadedConfig) return route._loadedConfig;\n    if (route && route.component) return null;\n  }\n\n  return null;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgModuleFactory, NgModuleRef, Type} from '@angular/core';\nimport {Observable} from 'rxjs';\n\nimport {ActivatedRouteSnapshot} from './router_state';\nimport {UrlSegment, UrlSegmentGroup} from './url_tree';\n\n\n/**\n * Represents a route configuration for the Router service.\n * An array of `Route` objects, used in `Router.config` and for nested route configurations\n * in `Route.children`.\n *\n * @see `Route`\n * @see `Router`\n * @see [Router configuration guide](guide/router#configuration)\n * @publicApi\n */\nexport type Routes = Route[];\n\n/**\n * Represents the result of matching URLs with a custom matching function.\n *\n * * `consumed` is an array of the consumed URL segments.\n * * `posParams` is a map of positional parameters.\n *\n * @see `UrlMatcher()`\n * @publicApi\n */\nexport type UrlMatchResult = {\n  consumed: UrlSegment[];\n  posParams?: {[name: string]: UrlSegment};\n};\n\n/**\n * A function for matching a route against URLs. Implement a custom URL matcher\n * for `Route.matcher` when a combination of `path` and `pathMatch`\n * is not expressive enough. Cannot be used together with `path` and `pathMatch`.\n *\n * The function takes the following arguments and returns a `UrlMatchResult` object.\n * * *segments* : An array of URL segments.\n * * *group* : A segment group.\n * * *route* : The route to match against.\n *\n * The following example implementation matches HTML files.\n *\n * ```\n * export function htmlFiles(url: UrlSegment[]) {\n *   return url.length === 1 && url[0].path.endsWith('.html') ? ({consumed: url}) : null;\n * }\n *\n * export const routes = [{ matcher: htmlFiles, component: AnyComponent }];\n * ```\n *\n * @publicApi\n */\nexport type UrlMatcher = (segments: UrlSegment[], group: UrlSegmentGroup, route: Route) =>\n    UrlMatchResult|null;\n\n/**\n *\n * Represents static data associated with a particular route.\n *\n * @see `Route#data`\n *\n * @publicApi\n */\nexport type Data = {\n  [name: string]: any\n};\n\n/**\n *\n * Represents the resolved data associated with a particular route.\n *\n * @see `Route#resolve`.\n *\n * @publicApi\n */\nexport type ResolveData = {\n  [name: string]: any\n};\n\n/**\n *\n * A function that is called to resolve a collection of lazy-loaded routes.\n * Must be an arrow function of the following form:\n * `() => import('...').then(mod => mod.MODULE)`\n *\n * For example:\n *\n * ```\n * [{\n *   path: 'lazy',\n *   loadChildren: () => import('./lazy-route/lazy.module').then(mod => mod.LazyModule),\n * }];\n * ```\n *\n * @see [Route.loadChildren](api/router/Route#loadChildren)\n * @publicApi\n */\nexport type LoadChildrenCallback = () => Type<any>|NgModuleFactory<any>|Observable<Type<any>>|\n    Promise<NgModuleFactory<any>|Type<any>|any>;\n\n/**\n *\n * A function that returns a set of routes to load.\n *\n * The string form of `LoadChildren` is deprecated (see `DeprecatedLoadChildren`). The function\n * form (`LoadChildrenCallback`) should be used instead.\n *\n * @see `loadChildrenCallback`\n * @publicApi\n */\nexport type LoadChildren = LoadChildrenCallback|DeprecatedLoadChildren;\n\n/**\n * A string of the form `path/to/file#exportName` that acts as a URL for a set of routes to load.\n *\n * @see `loadChildrenCallback`\n * @publicApi\n * @deprecated The `string` form of `loadChildren` is deprecated in favor of the\n * `LoadChildrenCallback` function which uses the ES dynamic `import()` expression.\n * This offers a more natural and standards-based mechanism to dynamically\n * load an ES module at runtime.\n */\nexport type DeprecatedLoadChildren = string;\n\n/**\n *\n * How to handle query parameters in a router link.\n * One of:\n * - `merge` : Merge new with current parameters.\n * - `preserve` : Preserve current parameters.\n *\n * @see `NavigationExtras#queryParamsHandling`\n * @see `RouterLink`\n * @publicApi\n */\nexport type QueryParamsHandling = 'merge'|'preserve'|'';\n\n/**\n *\n * A policy for when to run guards and resolvers on a route.\n *\n * @see [Route.runGuardsAndResolvers](api/router/Route#runGuardsAndResolvers)\n * @publicApi\n */\nexport type RunGuardsAndResolvers =\n    'pathParamsChange'|'pathParamsOrQueryParamsChange'|'paramsChange'|'paramsOrQueryParamsChange'|\n    'always'|((from: ActivatedRouteSnapshot, to: ActivatedRouteSnapshot) => boolean);\n\n/**\n * A configuration object that defines a single route.\n * A set of routes are collected in a `Routes` array to define a `Router` configuration.\n * The router attempts to match segments of a given URL against each route,\n * using the configuration options defined in this object.\n *\n * Supports static, parameterized, redirect, and wildcard routes, as well as\n * custom route data and resolve methods.\n *\n * For detailed usage information, see the [Routing Guide](guide/router).\n *\n * @usageNotes\n *\n * ### Simple Configuration\n *\n * The following route specifies that when navigating to, for example,\n * `/team/11/user/bob`, the router creates the 'Team' component\n * with the 'User' child component in it.\n *\n * ```\n * [{\n *   path: 'team/:id',\n  *  component: Team,\n *   children: [{\n *     path: 'user/:name',\n *     component: User\n *   }]\n * }]\n * ```\n *\n * ### Multiple Outlets\n *\n * The following route creates sibling components with multiple outlets.\n * When navigating to `/team/11(aux:chat/jim)`, the router creates the 'Team' component next to\n * the 'Chat' component. The 'Chat' component is placed into the 'aux' outlet.\n *\n * ```\n * [{\n *   path: 'team/:id',\n *   component: Team\n * }, {\n *   path: 'chat/:user',\n *   component: Chat\n *   outlet: 'aux'\n * }]\n * ```\n *\n * ### Wild Cards\n *\n * The following route uses wild-card notation to specify a component\n * that is always instantiated regardless of where you navigate to.\n *\n * ```\n * [{\n *   path: '**',\n *   component: WildcardComponent\n * }]\n * ```\n *\n * ### Redirects\n *\n * The following route uses the `redirectTo` property to ignore a segment of\n * a given URL when looking for a child path.\n *\n * When navigating to '/team/11/legacy/user/jim', the router changes the URL segment\n * '/team/11/legacy/user/jim' to '/team/11/user/jim', and then instantiates\n * the Team component with the User child component in it.\n *\n * ```\n * [{\n *   path: 'team/:id',\n *   component: Team,\n *   children: [{\n *     path: 'legacy/user/:name',\n *     redirectTo: 'user/:name'\n *   }, {\n *     path: 'user/:name',\n *     component: User\n *   }]\n * }]\n * ```\n *\n * The redirect path can be relative, as shown in this example, or absolute.\n * If we change the `redirectTo` value in the example to the absolute URL segment '/user/:name',\n * the result URL is also absolute, '/user/jim'.\n\n * ### Empty Path\n *\n * Empty-path route configurations can be used to instantiate components that do not 'consume'\n * any URL segments.\n *\n * In the following configuration, when navigating to\n * `/team/11`, the router instantiates the 'AllUsers' component.\n *\n * ```\n * [{\n *   path: 'team/:id',\n *   component: Team,\n *   children: [{\n *     path: '',\n *     component: AllUsers\n *   }, {\n *     path: 'user/:name',\n *     component: User\n *   }]\n * }]\n * ```\n *\n * Empty-path routes can have children. In the following example, when navigating\n * to `/team/11/user/jim`, the router instantiates the wrapper component with\n * the user component in it.\n *\n * Note that an empty path route inherits its parent's parameters and data.\n *\n * ```\n * [{\n *   path: 'team/:id',\n *   component: Team,\n *   children: [{\n *     path: '',\n *     component: WrapperCmp,\n *     children: [{\n *       path: 'user/:name',\n *       component: User\n *     }]\n *   }]\n * }]\n * ```\n *\n * ### Matching Strategy\n *\n * The default path-match strategy is 'prefix', which means that the router\n * checks URL elements from the left to see if the URL matches a specified path.\n * For example, '/team/11/user' matches 'team/:id'.\n *\n * ```\n * [{\n *   path: '',\n *   pathMatch: 'prefix', //default\n *   redirectTo: 'main'\n * }, {\n *   path: 'main',\n *   component: Main\n * }]\n * ```\n *\n * You can specify the path-match strategy 'full' to make sure that the path\n * covers the whole unconsumed URL. It is important to do this when redirecting\n * empty-path routes. Otherwise, because an empty path is a prefix of any URL,\n * the router would apply the redirect even when navigating to the redirect destination,\n * creating an endless loop.\n *\n * In the following example, supplying the 'full' `pathMatch` strategy ensures\n * that the router applies the redirect if and only if navigating to '/'.\n *\n * ```\n * [{\n *   path: '',\n *   pathMatch: 'full',\n *   redirectTo: 'main'\n * }, {\n *   path: 'main',\n *   component: Main\n * }]\n * ```\n *\n * ### Componentless Routes\n *\n * You can share parameters between sibling components.\n * For example, suppose that two sibling components should go next to each other,\n * and both of them require an ID parameter. You can accomplish this using a route\n * that does not specify a component at the top level.\n *\n * In the following example, 'MainChild' and 'AuxChild' are siblings.\n * When navigating to 'parent/10/(a//aux:b)', the route instantiates\n * the main child and aux child components next to each other.\n * For this to work, the application component must have the primary and aux outlets defined.\n *\n * ```\n * [{\n *    path: 'parent/:id',\n *    children: [\n *      { path: 'a', component: MainChild },\n *      { path: 'b', component: AuxChild, outlet: 'aux' }\n *    ]\n * }]\n * ```\n *\n * The router merges the parameters, data, and resolve of the componentless\n * parent into the parameters, data, and resolve of the children.\n *\n * This is especially useful when child components are defined\n * with an empty path string, as in the following example.\n * With this configuration, navigating to '/parent/10' creates\n * the main child and aux components.\n *\n * ```\n * [{\n *    path: 'parent/:id',\n *    children: [\n *      { path: '', component: MainChild },\n *      { path: '', component: AuxChild, outlet: 'aux' }\n *    ]\n * }]\n * ```\n *\n * ### Lazy Loading\n *\n * Lazy loading speeds up application load time by splitting the application\n * into multiple bundles and loading them on demand.\n * To use lazy loading, provide the `loadChildren` property in the `Route` object,\n * instead of the `children` property.\n *\n * Given the following example route, the router will lazy load\n * the associated module on demand using the browser native import system.\n *\n * ```\n * [{\n *   path: 'lazy',\n *   loadChildren: () => import('./lazy-route/lazy.module').then(mod => mod.LazyModule),\n * }];\n * ```\n *\n * @publicApi\n */\nexport interface Route {\n  /**\n   * The path to match against. Cannot be used together with a custom `matcher` function.\n   * A URL string that uses router matching notation.\n   * Can be a wild card (`**`) that matches any URL (see Usage Notes below).\n   * Default is \"/\" (the root path).\n   *\n   */\n  path?: string;\n  /**\n   * The path-matching strategy, one of 'prefix' or 'full'.\n   * Default is 'prefix'.\n   *\n   * By default, the router checks URL elements from the left to see if the URL\n   * matches a given  path, and stops when there is a match. For example,\n   * '/team/11/user' matches 'team/:id'.\n   *\n   * The path-match strategy 'full' matches against the entire URL.\n   * It is important to do this when redirecting empty-path routes.\n   * Otherwise, because an empty path is a prefix of any URL,\n   * the router would apply the redirect even when navigating\n   * to the redirect destination, creating an endless loop.\n   *\n   */\n  pathMatch?: string;\n  /**\n   * A custom URL-matching function. Cannot be used together with `path`.\n   */\n  matcher?: UrlMatcher;\n  /**\n   * The component to instantiate when the path matches.\n   * Can be empty if child routes specify components.\n   */\n  component?: Type<any>;\n  /**\n   * A URL to redirect to when the path matches.\n   * Absolute if the URL begins with a slash (/), otherwise relative to the path URL.\n   * When not present, router does not redirect.\n   */\n  redirectTo?: string;\n  /**\n   * Name of a `RouterOutlet` object where the component can be placed\n   * when the path matches.\n   */\n  outlet?: string;\n  /**\n   * An array of dependency-injection tokens used to look up `CanActivate()`\n   * handlers, in order to determine if the current user is allowed to\n   * activate the component. By default, any user can activate.\n   */\n  canActivate?: any[];\n  /**\n   * An array of DI tokens used to look up `CanActivateChild()` handlers,\n   * in order to determine if the current user is allowed to activate\n   * a child of the component. By default, any user can activate a child.\n   */\n  canActivateChild?: any[];\n  /**\n   * An array of DI tokens used to look up `CanDeactivate()`\n   * handlers, in order to determine if the current user is allowed to\n   * deactivate the component. By default, any user can deactivate.\n   *\n   */\n  canDeactivate?: any[];\n  /**\n   * An array of DI tokens used to look up `CanLoad()`\n   * handlers, in order to determine if the current user is allowed to\n   * load the component. By default, any user can load.\n   */\n  canLoad?: any[];\n  /**\n   * Additional developer-defined data provided to the component via\n   * `ActivatedRoute`. By default, no additional data is passed.\n   */\n  data?: Data;\n  /**\n   * A map of DI tokens used to look up data resolvers. See `Resolve`.\n   */\n  resolve?: ResolveData;\n  /**\n   * An array of child `Route` objects that specifies a nested route\n   * configuration.\n   */\n  children?: Routes;\n  /**\n   * An object specifying lazy-loaded child routes.\n   */\n  loadChildren?: LoadChildren;\n  /**\n   * Defines when guards and resolvers will be run. One of\n   * - `paramsOrQueryParamsChange` : Run when query parameters change.\n   * - `always` : Run on every execution.\n   * By default, guards and resolvers run only when the matrix\n   * parameters of the route change.\n   */\n  runGuardsAndResolvers?: RunGuardsAndResolvers;\n  /**\n   * Filled for routes with `loadChildren` once the module has been loaded\n   * @internal\n   */\n  _loadedConfig?: LoadedRouterConfig;\n}\n\nexport class LoadedRouterConfig {\n  constructor(public routes: Route[], public module: NgModuleRef<any>) {}\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {CanActivate, CanActivateChild, CanDeactivate, CanLoad} from '../interfaces';\nimport {UrlTree} from '../url_tree';\n\n/**\n * Simple function check, but generic so type inference will flow. Example:\n *\n * function product(a: number, b: number) {\n *   return a * b;\n * }\n *\n * if (isFunction<product>(fn)) {\n *   return fn(1, 2);\n * } else {\n *   throw \"Must provide the `product` function\";\n * }\n */\nexport function isFunction<T>(v: any): v is T {\n  return typeof v === 'function';\n}\n\nexport function isBoolean(v: any): v is boolean {\n  return typeof v === 'boolean';\n}\n\nexport function isUrlTree(v: any): v is UrlTree {\n  return v instanceof UrlTree;\n}\n\nexport function isCanLoad(guard: any): guard is CanLoad {\n  return guard && isFunction<CanLoad>(guard.canLoad);\n}\n\nexport function isCanActivate(guard: any): guard is CanActivate {\n  return guard && isFunction<CanActivate>(guard.canActivate);\n}\n\nexport function isCanActivateChild(guard: any): guard is CanActivateChild {\n  return guard && isFunction<CanActivateChild>(guard.canActivateChild);\n}\n\nexport function isCanDeactivate<T>(guard: any): guard is CanDeactivate<T> {\n  return guard && isFunction<CanDeactivate<T>>(guard.canDeactivate);\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {combineLatest, Observable, OperatorFunction} from 'rxjs';\nimport {filter, map, scan, startWith, switchMap, take} from 'rxjs/operators';\n\nimport {UrlTree} from '../url_tree';\nimport {isUrlTree} from '../utils/type_guards';\n\nconst INITIAL_VALUE = Symbol('INITIAL_VALUE');\ndeclare type INTERIM_VALUES = typeof INITIAL_VALUE | boolean | UrlTree;\n\nexport function prioritizedGuardValue():\n    OperatorFunction<Observable<boolean|UrlTree>[], boolean|UrlTree> {\n  return switchMap(obs => {\n    return combineLatest(\n               ...obs.map(o => o.pipe(take(1), startWith(INITIAL_VALUE as INTERIM_VALUES))))\n               .pipe(\n                   scan(\n                       (acc: INTERIM_VALUES, list: INTERIM_VALUES[]) => {\n                         let isPending = false;\n                         return list.reduce((innerAcc, val, i: number) => {\n                           if (innerAcc !== INITIAL_VALUE) return innerAcc;\n\n                           // Toggle pending flag if any values haven't been set yet\n                           if (val === INITIAL_VALUE) isPending = true;\n\n                           // Any other return values are only valid if we haven't yet hit a pending\n                           // call. This guarantees that in the case of a guard at the bottom of the\n                           // tree that returns a redirect, we will wait for the higher priority\n                           // guard at the top to finish before performing the redirect.\n                           if (!isPending) {\n                             // Early return when we hit a `false` value as that should always\n                             // cancel navigation\n                             if (val === false) return val;\n\n                             if (i === list.length - 1 || isUrlTree(val)) {\n                               return val;\n                             }\n                           }\n\n                           return innerAcc;\n                         }, acc);\n                       },\n                       INITIAL_VALUE),\n                   filter(item => item !== INITIAL_VALUE),\n                   map(item => isUrlTree(item) ? item : item === true),  //\n                   take(1)) as Observable<boolean|UrlTree>;\n  });\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injector, NgModuleRef} from '@angular/core';\nimport {EmptyError, Observable, Observer, of} from 'rxjs';\nimport {catchError, concatMap, first, map, mergeMap, tap} from 'rxjs/operators';\n\nimport {LoadedRouterConfig, Route, Routes} from './config';\nimport {CanLoadFn} from './interfaces';\nimport {prioritizedGuardValue} from './operators/prioritized_guard_value';\nimport {RouterConfigLoader} from './router_config_loader';\nimport {defaultUrlMatcher, navigationCancelingError, Params, PRIMARY_OUTLET} from './shared';\nimport {UrlSegment, UrlSegmentGroup, UrlSerializer, UrlTree} from './url_tree';\nimport {forEach, waitForMap, wrapIntoObservable} from './utils/collection';\nimport {isCanLoad, isFunction, isUrlTree} from './utils/type_guards';\n\nclass NoMatch {\n  public segmentGroup: UrlSegmentGroup|null;\n\n  constructor(segmentGroup?: UrlSegmentGroup) {\n    this.segmentGroup = segmentGroup || null;\n  }\n}\n\nclass AbsoluteRedirect {\n  constructor(public urlTree: UrlTree) {}\n}\n\nfunction noMatch(segmentGroup: UrlSegmentGroup): Observable<UrlSegmentGroup> {\n  return new Observable<UrlSegmentGroup>(\n      (obs: Observer<UrlSegmentGroup>) => obs.error(new NoMatch(segmentGroup)));\n}\n\nfunction absoluteRedirect(newTree: UrlTree): Observable<any> {\n  return new Observable<UrlSegmentGroup>(\n      (obs: Observer<UrlSegmentGroup>) => obs.error(new AbsoluteRedirect(newTree)));\n}\n\nfunction namedOutletsRedirect(redirectTo: string): Observable<any> {\n  return new Observable<UrlSegmentGroup>(\n      (obs: Observer<UrlSegmentGroup>) => obs.error(new Error(\n          `Only absolute redirects can have named outlets. redirectTo: '${redirectTo}'`)));\n}\n\nfunction canLoadFails(route: Route): Observable<LoadedRouterConfig> {\n  return new Observable<LoadedRouterConfig>(\n      (obs: Observer<LoadedRouterConfig>) => obs.error(\n          navigationCancelingError(`Cannot load children because the guard of the route \"path: '${\n              route.path}'\" returned false`)));\n}\n\n/**\n * Returns the `UrlTree` with the redirection applied.\n *\n * Lazy modules are loaded along the way.\n */\nexport function applyRedirects(\n    moduleInjector: Injector, configLoader: RouterConfigLoader, urlSerializer: UrlSerializer,\n    urlTree: UrlTree, config: Routes): Observable<UrlTree> {\n  return new ApplyRedirects(moduleInjector, configLoader, urlSerializer, urlTree, config).apply();\n}\n\nclass ApplyRedirects {\n  private allowRedirects: boolean = true;\n  private ngModule: NgModuleRef<any>;\n\n  constructor(\n      moduleInjector: Injector, private configLoader: RouterConfigLoader,\n      private urlSerializer: UrlSerializer, private urlTree: UrlTree, private config: Routes) {\n    this.ngModule = moduleInjector.get(NgModuleRef);\n  }\n\n  apply(): Observable<UrlTree> {\n    const expanded$ =\n        this.expandSegmentGroup(this.ngModule, this.config, this.urlTree.root, PRIMARY_OUTLET);\n    const urlTrees$ = expanded$.pipe(\n        map((rootSegmentGroup: UrlSegmentGroup) => this.createUrlTree(\n                rootSegmentGroup, this.urlTree.queryParams, this.urlTree.fragment!)));\n    return urlTrees$.pipe(catchError((e: any) => {\n      if (e instanceof AbsoluteRedirect) {\n        // after an absolute redirect we do not apply any more redirects!\n        this.allowRedirects = false;\n        // we need to run matching, so we can fetch all lazy-loaded modules\n        return this.match(e.urlTree);\n      }\n\n      if (e instanceof NoMatch) {\n        throw this.noMatchError(e);\n      }\n\n      throw e;\n    }));\n  }\n\n  private match(tree: UrlTree): Observable<UrlTree> {\n    const expanded$ =\n        this.expandSegmentGroup(this.ngModule, this.config, tree.root, PRIMARY_OUTLET);\n    const mapped$ = expanded$.pipe(\n        map((rootSegmentGroup: UrlSegmentGroup) =>\n                this.createUrlTree(rootSegmentGroup, tree.queryParams, tree.fragment!)));\n    return mapped$.pipe(catchError((e: any): Observable<UrlTree> => {\n      if (e instanceof NoMatch) {\n        throw this.noMatchError(e);\n      }\n\n      throw e;\n    }));\n  }\n\n  private noMatchError(e: NoMatch): any {\n    return new Error(`Cannot match any routes. URL Segment: '${e.segmentGroup}'`);\n  }\n\n  private createUrlTree(rootCandidate: UrlSegmentGroup, queryParams: Params, fragment: string):\n      UrlTree {\n    const root = rootCandidate.segments.length > 0 ?\n        new UrlSegmentGroup([], {[PRIMARY_OUTLET]: rootCandidate}) :\n        rootCandidate;\n    return new UrlTree(root, queryParams, fragment);\n  }\n\n  private expandSegmentGroup(\n      ngModule: NgModuleRef<any>, routes: Route[], segmentGroup: UrlSegmentGroup,\n      outlet: string): Observable<UrlSegmentGroup> {\n    if (segmentGroup.segments.length === 0 && segmentGroup.hasChildren()) {\n      return this.expandChildren(ngModule, routes, segmentGroup)\n          .pipe(map((children: any) => new UrlSegmentGroup([], children)));\n    }\n\n    return this.expandSegment(ngModule, segmentGroup, routes, segmentGroup.segments, outlet, true);\n  }\n\n  // Recursively expand segment groups for all the child outlets\n  private expandChildren(\n      ngModule: NgModuleRef<any>, routes: Route[],\n      segmentGroup: UrlSegmentGroup): Observable<{[name: string]: UrlSegmentGroup}> {\n    return waitForMap(\n        segmentGroup.children,\n        (childOutlet, child) => this.expandSegmentGroup(ngModule, routes, child, childOutlet));\n  }\n\n  private expandSegment(\n      ngModule: NgModuleRef<any>, segmentGroup: UrlSegmentGroup, routes: Route[],\n      segments: UrlSegment[], outlet: string,\n      allowRedirects: boolean): Observable<UrlSegmentGroup> {\n    return of(...routes).pipe(\n        concatMap((r: any) => {\n          const expanded$ = this.expandSegmentAgainstRoute(\n              ngModule, segmentGroup, routes, r, segments, outlet, allowRedirects);\n          return expanded$.pipe(catchError((e: any) => {\n            if (e instanceof NoMatch) {\n              // TODO(i): this return type doesn't match the declared Observable<UrlSegmentGroup> -\n              // talk to Jason\n              return of(null) as any;\n            }\n            throw e;\n          }));\n        }),\n        first((s: any) => !!s), catchError((e: any, _: any) => {\n          if (e instanceof EmptyError || e.name === 'EmptyError') {\n            if (this.noLeftoversInUrl(segmentGroup, segments, outlet)) {\n              return of(new UrlSegmentGroup([], {}));\n            }\n            throw new NoMatch(segmentGroup);\n          }\n          throw e;\n        }));\n  }\n\n  private noLeftoversInUrl(segmentGroup: UrlSegmentGroup, segments: UrlSegment[], outlet: string):\n      boolean {\n    return segments.length === 0 && !segmentGroup.children[outlet];\n  }\n\n  private expandSegmentAgainstRoute(\n      ngModule: NgModuleRef<any>, segmentGroup: UrlSegmentGroup, routes: Route[], route: Route,\n      paths: UrlSegment[], outlet: string, allowRedirects: boolean): Observable<UrlSegmentGroup> {\n    if (getOutlet(route) !== outlet) {\n      return noMatch(segmentGroup);\n    }\n\n    if (route.redirectTo === undefined) {\n      return this.matchSegmentAgainstRoute(ngModule, segmentGroup, route, paths);\n    }\n\n    if (allowRedirects && this.allowRedirects) {\n      return this.expandSegmentAgainstRouteUsingRedirect(\n          ngModule, segmentGroup, routes, route, paths, outlet);\n    }\n\n    return noMatch(segmentGroup);\n  }\n\n  private expandSegmentAgainstRouteUsingRedirect(\n      ngModule: NgModuleRef<any>, segmentGroup: UrlSegmentGroup, routes: Route[], route: Route,\n      segments: UrlSegment[], outlet: string): Observable<UrlSegmentGroup> {\n    if (route.path === '**') {\n      return this.expandWildCardWithParamsAgainstRouteUsingRedirect(\n          ngModule, routes, route, outlet);\n    }\n\n    return this.expandRegularSegmentAgainstRouteUsingRedirect(\n        ngModule, segmentGroup, routes, route, segments, outlet);\n  }\n\n  private expandWildCardWithParamsAgainstRouteUsingRedirect(\n      ngModule: NgModuleRef<any>, routes: Route[], route: Route,\n      outlet: string): Observable<UrlSegmentGroup> {\n    const newTree = this.applyRedirectCommands([], route.redirectTo!, {});\n    if (route.redirectTo!.startsWith('/')) {\n      return absoluteRedirect(newTree);\n    }\n\n    return this.lineralizeSegments(route, newTree).pipe(mergeMap((newSegments: UrlSegment[]) => {\n      const group = new UrlSegmentGroup(newSegments, {});\n      return this.expandSegment(ngModule, group, routes, newSegments, outlet, false);\n    }));\n  }\n\n  private expandRegularSegmentAgainstRouteUsingRedirect(\n      ngModule: NgModuleRef<any>, segmentGroup: UrlSegmentGroup, routes: Route[], route: Route,\n      segments: UrlSegment[], outlet: string): Observable<UrlSegmentGroup> {\n    const {matched, consumedSegments, lastChild, positionalParamSegments} =\n        match(segmentGroup, route, segments);\n    if (!matched) return noMatch(segmentGroup);\n\n    const newTree = this.applyRedirectCommands(\n        consumedSegments, route.redirectTo!, <any>positionalParamSegments);\n    if (route.redirectTo!.startsWith('/')) {\n      return absoluteRedirect(newTree);\n    }\n\n    return this.lineralizeSegments(route, newTree).pipe(mergeMap((newSegments: UrlSegment[]) => {\n      return this.expandSegment(\n          ngModule, segmentGroup, routes, newSegments.concat(segments.slice(lastChild)), outlet,\n          false);\n    }));\n  }\n\n  private matchSegmentAgainstRoute(\n      ngModule: NgModuleRef<any>, rawSegmentGroup: UrlSegmentGroup, route: Route,\n      segments: UrlSegment[]): Observable<UrlSegmentGroup> {\n    if (route.path === '**') {\n      if (route.loadChildren) {\n        return this.configLoader.load(ngModule.injector, route)\n            .pipe(map((cfg: LoadedRouterConfig) => {\n              route._loadedConfig = cfg;\n              return new UrlSegmentGroup(segments, {});\n            }));\n      }\n\n      return of(new UrlSegmentGroup(segments, {}));\n    }\n\n    const {matched, consumedSegments, lastChild} = match(rawSegmentGroup, route, segments);\n    if (!matched) return noMatch(rawSegmentGroup);\n\n    const rawSlicedSegments = segments.slice(lastChild);\n    const childConfig$ = this.getChildConfig(ngModule, route, segments);\n\n    return childConfig$.pipe(mergeMap((routerConfig: LoadedRouterConfig) => {\n      const childModule = routerConfig.module;\n      const childConfig = routerConfig.routes;\n\n      const {segmentGroup, slicedSegments} =\n          split(rawSegmentGroup, consumedSegments, rawSlicedSegments, childConfig);\n\n      if (slicedSegments.length === 0 && segmentGroup.hasChildren()) {\n        const expanded$ = this.expandChildren(childModule, childConfig, segmentGroup);\n        return expanded$.pipe(\n            map((children: any) => new UrlSegmentGroup(consumedSegments, children)));\n      }\n\n      if (childConfig.length === 0 && slicedSegments.length === 0) {\n        return of(new UrlSegmentGroup(consumedSegments, {}));\n      }\n\n      const expanded$ = this.expandSegment(\n          childModule, segmentGroup, childConfig, slicedSegments, PRIMARY_OUTLET, true);\n      return expanded$.pipe(\n          map((cs: UrlSegmentGroup) =>\n                  new UrlSegmentGroup(consumedSegments.concat(cs.segments), cs.children)));\n    }));\n  }\n\n  private getChildConfig(ngModule: NgModuleRef<any>, route: Route, segments: UrlSegment[]):\n      Observable<LoadedRouterConfig> {\n    if (route.children) {\n      // The children belong to the same module\n      return of(new LoadedRouterConfig(route.children, ngModule));\n    }\n\n    if (route.loadChildren) {\n      // lazy children belong to the loaded module\n      if (route._loadedConfig !== undefined) {\n        return of(route._loadedConfig);\n      }\n\n      return this.runCanLoadGuards(ngModule.injector, route, segments)\n          .pipe(mergeMap((shouldLoadResult: boolean) => {\n            if (shouldLoadResult) {\n              return this.configLoader.load(ngModule.injector, route)\n                  .pipe(map((cfg: LoadedRouterConfig) => {\n                    route._loadedConfig = cfg;\n                    return cfg;\n                  }));\n            }\n            return canLoadFails(route);\n          }));\n    }\n\n    return of(new LoadedRouterConfig([], ngModule));\n  }\n\n  private runCanLoadGuards(moduleInjector: Injector, route: Route, segments: UrlSegment[]):\n      Observable<boolean> {\n    const canLoad = route.canLoad;\n    if (!canLoad || canLoad.length === 0) return of(true);\n\n    const canLoadObservables = canLoad.map((injectionToken: any) => {\n      const guard = moduleInjector.get(injectionToken);\n      let guardVal;\n      if (isCanLoad(guard)) {\n        guardVal = guard.canLoad(route, segments);\n      } else if (isFunction<CanLoadFn>(guard)) {\n        guardVal = guard(route, segments);\n      } else {\n        throw new Error('Invalid CanLoad guard');\n      }\n      return wrapIntoObservable(guardVal);\n    });\n\n    return of(canLoadObservables)\n        .pipe(\n            prioritizedGuardValue(),\n            tap((result: UrlTree|boolean) => {\n              if (!isUrlTree(result)) return;\n\n              const error: Error&{url?: UrlTree} = navigationCancelingError(\n                  `Redirecting to \"${this.urlSerializer.serialize(result)}\"`);\n              error.url = result;\n              throw error;\n            }),\n            map(result => result === true),\n        );\n  }\n\n  private lineralizeSegments(route: Route, urlTree: UrlTree): Observable<UrlSegment[]> {\n    let res: UrlSegment[] = [];\n    let c = urlTree.root;\n    while (true) {\n      res = res.concat(c.segments);\n      if (c.numberOfChildren === 0) {\n        return of(res);\n      }\n\n      if (c.numberOfChildren > 1 || !c.children[PRIMARY_OUTLET]) {\n        return namedOutletsRedirect(route.redirectTo!);\n      }\n\n      c = c.children[PRIMARY_OUTLET];\n    }\n  }\n\n  private applyRedirectCommands(\n      segments: UrlSegment[], redirectTo: string, posParams: {[k: string]: UrlSegment}): UrlTree {\n    return this.applyRedirectCreatreUrlTree(\n        redirectTo, this.urlSerializer.parse(redirectTo), segments, posParams);\n  }\n\n  private applyRedirectCreatreUrlTree(\n      redirectTo: string, urlTree: UrlTree, segments: UrlSegment[],\n      posParams: {[k: string]: UrlSegment}): UrlTree {\n    const newRoot = this.createSegmentGroup(redirectTo, urlTree.root, segments, posParams);\n    return new UrlTree(\n        newRoot, this.createQueryParams(urlTree.queryParams, this.urlTree.queryParams),\n        urlTree.fragment);\n  }\n\n  private createQueryParams(redirectToParams: Params, actualParams: Params): Params {\n    const res: Params = {};\n    forEach(redirectToParams, (v: any, k: string) => {\n      const copySourceValue = typeof v === 'string' && v.startsWith(':');\n      if (copySourceValue) {\n        const sourceName = v.substring(1);\n        res[k] = actualParams[sourceName];\n      } else {\n        res[k] = v;\n      }\n    });\n    return res;\n  }\n\n  private createSegmentGroup(\n      redirectTo: string, group: UrlSegmentGroup, segments: UrlSegment[],\n      posParams: {[k: string]: UrlSegment}): UrlSegmentGroup {\n    const updatedSegments = this.createSegments(redirectTo, group.segments, segments, posParams);\n\n    let children: {[n: string]: UrlSegmentGroup} = {};\n    forEach(group.children, (child: UrlSegmentGroup, name: string) => {\n      children[name] = this.createSegmentGroup(redirectTo, child, segments, posParams);\n    });\n\n    return new UrlSegmentGroup(updatedSegments, children);\n  }\n\n  private createSegments(\n      redirectTo: string, redirectToSegments: UrlSegment[], actualSegments: UrlSegment[],\n      posParams: {[k: string]: UrlSegment}): UrlSegment[] {\n    return redirectToSegments.map(\n        s => s.path.startsWith(':') ? this.findPosParam(redirectTo, s, posParams) :\n                                      this.findOrReturn(s, actualSegments));\n  }\n\n  private findPosParam(\n      redirectTo: string, redirectToUrlSegment: UrlSegment,\n      posParams: {[k: string]: UrlSegment}): UrlSegment {\n    const pos = posParams[redirectToUrlSegment.path.substring(1)];\n    if (!pos)\n      throw new Error(\n          `Cannot redirect to '${redirectTo}'. Cannot find '${redirectToUrlSegment.path}'.`);\n    return pos;\n  }\n\n  private findOrReturn(redirectToUrlSegment: UrlSegment, actualSegments: UrlSegment[]): UrlSegment {\n    let idx = 0;\n    for (const s of actualSegments) {\n      if (s.path === redirectToUrlSegment.path) {\n        actualSegments.splice(idx);\n        return s;\n      }\n      idx++;\n    }\n    return redirectToUrlSegment;\n  }\n}\n\nfunction match(segmentGroup: UrlSegmentGroup, route: Route, segments: UrlSegment[]): {\n  matched: boolean,\n  consumedSegments: UrlSegment[],\n  lastChild: number,\n  positionalParamSegments: {[k: string]: UrlSegment}\n} {\n  if (route.path === '') {\n    if ((route.pathMatch === 'full') && (segmentGroup.hasChildren() || segments.length > 0)) {\n      return {matched: false, consumedSegments: [], lastChild: 0, positionalParamSegments: {}};\n    }\n\n    return {matched: true, consumedSegments: [], lastChild: 0, positionalParamSegments: {}};\n  }\n\n  const matcher = route.matcher || defaultUrlMatcher;\n  const res = matcher(segments, segmentGroup, route);\n\n  if (!res) {\n    return {\n      matched: false,\n      consumedSegments: <any[]>[],\n      lastChild: 0,\n      positionalParamSegments: {},\n    };\n  }\n\n  return {\n    matched: true,\n    consumedSegments: res.consumed!,\n    lastChild: res.consumed.length!,\n    positionalParamSegments: res.posParams!,\n  };\n}\n\nfunction split(\n    segmentGroup: UrlSegmentGroup, consumedSegments: UrlSegment[], slicedSegments: UrlSegment[],\n    config: Route[]) {\n  if (slicedSegments.length > 0 &&\n      containsEmptyPathRedirectsWithNamedOutlets(segmentGroup, slicedSegments, config)) {\n    const s = new UrlSegmentGroup(\n        consumedSegments,\n        createChildrenForEmptySegments(\n            config, new UrlSegmentGroup(slicedSegments, segmentGroup.children)));\n    return {segmentGroup: mergeTrivialChildren(s), slicedSegments: []};\n  }\n\n  if (slicedSegments.length === 0 &&\n      containsEmptyPathRedirects(segmentGroup, slicedSegments, config)) {\n    const s = new UrlSegmentGroup(\n        segmentGroup.segments,\n        addEmptySegmentsToChildrenIfNeeded(\n            segmentGroup, slicedSegments, config, segmentGroup.children));\n    return {segmentGroup: mergeTrivialChildren(s), slicedSegments};\n  }\n\n  return {segmentGroup, slicedSegments};\n}\n\nfunction mergeTrivialChildren(s: UrlSegmentGroup): UrlSegmentGroup {\n  if (s.numberOfChildren === 1 && s.children[PRIMARY_OUTLET]) {\n    const c = s.children[PRIMARY_OUTLET];\n    return new UrlSegmentGroup(s.segments.concat(c.segments), c.children);\n  }\n\n  return s;\n}\n\nfunction addEmptySegmentsToChildrenIfNeeded(\n    segmentGroup: UrlSegmentGroup, slicedSegments: UrlSegment[], routes: Route[],\n    children: {[name: string]: UrlSegmentGroup}): {[name: string]: UrlSegmentGroup} {\n  const res: {[name: string]: UrlSegmentGroup} = {};\n  for (const r of routes) {\n    if (isEmptyPathRedirect(segmentGroup, slicedSegments, r) && !children[getOutlet(r)]) {\n      res[getOutlet(r)] = new UrlSegmentGroup([], {});\n    }\n  }\n  return {...children, ...res};\n}\n\nfunction createChildrenForEmptySegments(\n    routes: Route[], primarySegmentGroup: UrlSegmentGroup): {[name: string]: UrlSegmentGroup} {\n  const res: {[name: string]: UrlSegmentGroup} = {};\n  res[PRIMARY_OUTLET] = primarySegmentGroup;\n  for (const r of routes) {\n    if (r.path === '' && getOutlet(r) !== PRIMARY_OUTLET) {\n      res[getOutlet(r)] = new UrlSegmentGroup([], {});\n    }\n  }\n  return res;\n}\n\nfunction containsEmptyPathRedirectsWithNamedOutlets(\n    segmentGroup: UrlSegmentGroup, segments: UrlSegment[], routes: Route[]): boolean {\n  return routes.some(\n      r => isEmptyPathRedirect(segmentGroup, segments, r) && getOutlet(r) !== PRIMARY_OUTLET);\n}\n\nfunction containsEmptyPathRedirects(\n    segmentGroup: UrlSegmentGroup, segments: UrlSegment[], routes: Route[]): boolean {\n  return routes.some(r => isEmptyPathRedirect(segmentGroup, segments, r));\n}\n\nfunction isEmptyPathRedirect(\n    segmentGroup: UrlSegmentGroup, segments: UrlSegment[], r: Route): boolean {\n  if ((segmentGroup.hasChildren() || segments.length > 0) && r.pathMatch === 'full') {\n    return false;\n  }\n\n  return r.path === '' && r.redirectTo !== undefined;\n}\n\nfunction getOutlet(route: Route): string {\n  return route.outlet || PRIMARY_OUTLET;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injector} from '@angular/core';\nimport {MonoTypeOperatorFunction, Observable} from 'rxjs';\nimport {map, switchMap} from 'rxjs/operators';\n\nimport {applyRedirects as applyRedirectsFn} from '../apply_redirects';\nimport {Routes} from '../config';\nimport {NavigationTransition} from '../router';\nimport {RouterConfigLoader} from '../router_config_loader';\nimport {UrlSerializer} from '../url_tree';\n\nexport function applyRedirects(\n    moduleInjector: Injector, configLoader: RouterConfigLoader, urlSerializer: UrlSerializer,\n    config: Routes): MonoTypeOperatorFunction<NavigationTransition> {\n  return function(source: Observable<NavigationTransition>) {\n    return source.pipe(switchMap(\n        t => applyRedirectsFn(moduleInjector, configLoader, urlSerializer, t.extractedUrl, config)\n                 .pipe(map(urlAfterRedirects => ({...t, urlAfterRedirects})))));\n  };\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injector} from '@angular/core';\n\nimport {LoadedRouterConfig, RunGuardsAndResolvers} from '../config';\nimport {ChildrenOutletContexts, OutletContext} from '../router_outlet_context';\nimport {ActivatedRouteSnapshot, equalParamsAndUrlSegments, RouterStateSnapshot} from '../router_state';\nimport {equalPath} from '../url_tree';\nimport {forEach, shallowEqual} from '../utils/collection';\nimport {nodeChildrenAsMap, TreeNode} from '../utils/tree';\n\nexport class CanActivate {\n  readonly route: ActivatedRouteSnapshot;\n  constructor(public path: ActivatedRouteSnapshot[]) {\n    this.route = this.path[this.path.length - 1];\n  }\n}\n\nexport class CanDeactivate {\n  constructor(public component: Object|null, public route: ActivatedRouteSnapshot) {}\n}\n\nexport declare type Checks = {\n  canDeactivateChecks: CanDeactivate[],\n  canActivateChecks: CanActivate[],\n};\n\nexport function getAllRouteGuards(\n    future: RouterStateSnapshot, curr: RouterStateSnapshot,\n    parentContexts: ChildrenOutletContexts) {\n  const futureRoot = future._root;\n  const currRoot = curr ? curr._root : null;\n\n  return getChildRouteGuards(futureRoot, currRoot, parentContexts, [futureRoot.value]);\n}\n\nexport function getCanActivateChild(p: ActivatedRouteSnapshot):\n    {node: ActivatedRouteSnapshot, guards: any[]}|null {\n  const canActivateChild = p.routeConfig ? p.routeConfig.canActivateChild : null;\n  if (!canActivateChild || canActivateChild.length === 0) return null;\n  return {node: p, guards: canActivateChild};\n}\n\nexport function getToken(\n    token: any, snapshot: ActivatedRouteSnapshot, moduleInjector: Injector): any {\n  const config = getClosestLoadedConfig(snapshot);\n  const injector = config ? config.module.injector : moduleInjector;\n  return injector.get(token);\n}\n\nfunction getClosestLoadedConfig(snapshot: ActivatedRouteSnapshot): LoadedRouterConfig|null {\n  if (!snapshot) return null;\n\n  for (let s = snapshot.parent; s; s = s.parent) {\n    const route = s.routeConfig;\n    if (route && route._loadedConfig) return route._loadedConfig;\n  }\n\n  return null;\n}\n\nfunction getChildRouteGuards(\n    futureNode: TreeNode<ActivatedRouteSnapshot>, currNode: TreeNode<ActivatedRouteSnapshot>|null,\n    contexts: ChildrenOutletContexts|null, futurePath: ActivatedRouteSnapshot[], checks: Checks = {\n      canDeactivateChecks: [],\n      canActivateChecks: []\n    }): Checks {\n  const prevChildren = nodeChildrenAsMap(currNode);\n\n  // Process the children of the future route\n  futureNode.children.forEach(c => {\n    getRouteGuards(c, prevChildren[c.value.outlet], contexts, futurePath.concat([c.value]), checks);\n    delete prevChildren[c.value.outlet];\n  });\n\n  // Process any children left from the current route (not active for the future route)\n  forEach(\n      prevChildren,\n      (v: TreeNode<ActivatedRouteSnapshot>, k: string) =>\n          deactivateRouteAndItsChildren(v, contexts!.getContext(k), checks));\n\n  return checks;\n}\n\nfunction getRouteGuards(\n    futureNode: TreeNode<ActivatedRouteSnapshot>, currNode: TreeNode<ActivatedRouteSnapshot>,\n    parentContexts: ChildrenOutletContexts|null, futurePath: ActivatedRouteSnapshot[],\n    checks: Checks = {\n      canDeactivateChecks: [],\n      canActivateChecks: []\n    }): Checks {\n  const future = futureNode.value;\n  const curr = currNode ? currNode.value : null;\n  const context = parentContexts ? parentContexts.getContext(futureNode.value.outlet) : null;\n\n  // reusing the node\n  if (curr && future.routeConfig === curr.routeConfig) {\n    const shouldRun =\n        shouldRunGuardsAndResolvers(curr, future, future.routeConfig!.runGuardsAndResolvers);\n    if (shouldRun) {\n      checks.canActivateChecks.push(new CanActivate(futurePath));\n    } else {\n      // we need to set the data\n      future.data = curr.data;\n      future._resolvedData = curr._resolvedData;\n    }\n\n    // If we have a component, we need to go through an outlet.\n    if (future.component) {\n      getChildRouteGuards(\n          futureNode, currNode, context ? context.children : null, futurePath, checks);\n\n      // if we have a componentless route, we recurse but keep the same outlet map.\n    } else {\n      getChildRouteGuards(futureNode, currNode, parentContexts, futurePath, checks);\n    }\n\n    if (shouldRun) {\n      const component = context && context.outlet && context.outlet.component || null;\n      checks.canDeactivateChecks.push(new CanDeactivate(component, curr));\n    }\n  } else {\n    if (curr) {\n      deactivateRouteAndItsChildren(currNode, context, checks);\n    }\n\n    checks.canActivateChecks.push(new CanActivate(futurePath));\n    // If we have a component, we need to go through an outlet.\n    if (future.component) {\n      getChildRouteGuards(futureNode, null, context ? context.children : null, futurePath, checks);\n\n      // if we have a componentless route, we recurse but keep the same outlet map.\n    } else {\n      getChildRouteGuards(futureNode, null, parentContexts, futurePath, checks);\n    }\n  }\n\n  return checks;\n}\n\nfunction shouldRunGuardsAndResolvers(\n    curr: ActivatedRouteSnapshot, future: ActivatedRouteSnapshot,\n    mode: RunGuardsAndResolvers|undefined): boolean {\n  if (typeof mode === 'function') {\n    return mode(curr, future);\n  }\n  switch (mode) {\n    case 'pathParamsChange':\n      return !equalPath(curr.url, future.url);\n\n    case 'pathParamsOrQueryParamsChange':\n      return !equalPath(curr.url, future.url) ||\n          !shallowEqual(curr.queryParams, future.queryParams);\n\n    case 'always':\n      return true;\n\n    case 'paramsOrQueryParamsChange':\n      return !equalParamsAndUrlSegments(curr, future) ||\n          !shallowEqual(curr.queryParams, future.queryParams);\n\n    case 'paramsChange':\n    default:\n      return !equalParamsAndUrlSegments(curr, future);\n  }\n}\n\nfunction deactivateRouteAndItsChildren(\n    route: TreeNode<ActivatedRouteSnapshot>, context: OutletContext|null, checks: Checks): void {\n  const children = nodeChildrenAsMap(route);\n  const r = route.value;\n\n  forEach(children, (node: TreeNode<ActivatedRouteSnapshot>, childName: string) => {\n    if (!r.component) {\n      deactivateRouteAndItsChildren(node, context, checks);\n    } else if (context) {\n      deactivateRouteAndItsChildren(node, context.children.getContext(childName), checks);\n    } else {\n      deactivateRouteAndItsChildren(node, null, checks);\n    }\n  });\n\n  if (!r.component) {\n    checks.canDeactivateChecks.push(new CanDeactivate(null, r));\n  } else if (context && context.outlet && context.outlet.isActivated) {\n    checks.canDeactivateChecks.push(new CanDeactivate(context.outlet.component, r));\n  } else {\n    checks.canDeactivateChecks.push(new CanDeactivate(null, r));\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injector} from '@angular/core';\nimport {defer, from, MonoTypeOperatorFunction, Observable, of} from 'rxjs';\nimport {concatAll, concatMap, first, map, mergeMap} from 'rxjs/operators';\n\nimport {ActivationStart, ChildActivationStart, Event} from '../events';\nimport {CanActivateChildFn, CanActivateFn, CanDeactivateFn} from '../interfaces';\nimport {NavigationTransition} from '../router';\nimport {ActivatedRouteSnapshot, RouterStateSnapshot} from '../router_state';\nimport {UrlTree} from '../url_tree';\nimport {wrapIntoObservable} from '../utils/collection';\nimport {CanActivate, CanDeactivate, getCanActivateChild, getToken} from '../utils/preactivation';\nimport {isBoolean, isCanActivate, isCanActivateChild, isCanDeactivate, isFunction} from '../utils/type_guards';\n\nimport {prioritizedGuardValue} from './prioritized_guard_value';\n\nexport function checkGuards(moduleInjector: Injector, forwardEvent?: (evt: Event) => void):\n    MonoTypeOperatorFunction<NavigationTransition> {\n  return function(source: Observable<NavigationTransition>) {\n    return source.pipe(mergeMap(t => {\n      const {targetSnapshot, currentSnapshot, guards: {canActivateChecks, canDeactivateChecks}} = t;\n      if (canDeactivateChecks.length === 0 && canActivateChecks.length === 0) {\n        return of({...t, guardsResult: true});\n      }\n\n      return runCanDeactivateChecks(\n                 canDeactivateChecks, targetSnapshot!, currentSnapshot, moduleInjector)\n          .pipe(\n              mergeMap(canDeactivate => {\n                return canDeactivate && isBoolean(canDeactivate) ?\n                    runCanActivateChecks(\n                        targetSnapshot!, canActivateChecks, moduleInjector, forwardEvent) :\n                    of(canDeactivate);\n              }),\n              map(guardsResult => ({...t, guardsResult})));\n    }));\n  };\n}\n\nfunction runCanDeactivateChecks(\n    checks: CanDeactivate[], futureRSS: RouterStateSnapshot, currRSS: RouterStateSnapshot,\n    moduleInjector: Injector) {\n  return from(checks).pipe(\n      mergeMap(\n          check =>\n              runCanDeactivate(check.component, check.route, currRSS, futureRSS, moduleInjector)),\n      first(result => {\n        return result !== true;\n      }, true as boolean | UrlTree));\n}\n\nfunction runCanActivateChecks(\n    futureSnapshot: RouterStateSnapshot, checks: CanActivate[], moduleInjector: Injector,\n    forwardEvent?: (evt: Event) => void) {\n  return from(checks).pipe(\n      concatMap((check: CanActivate) => {\n        return from([\n                 fireChildActivationStart(check.route.parent, forwardEvent),\n                 fireActivationStart(check.route, forwardEvent),\n                 runCanActivateChild(futureSnapshot, check.path, moduleInjector),\n                 runCanActivate(futureSnapshot, check.route, moduleInjector)\n               ])\n            .pipe(concatAll(), first(result => {\n                    return result !== true;\n                  }, true as boolean | UrlTree));\n      }),\n      first(result => {\n        return result !== true;\n      }, true as boolean | UrlTree));\n}\n\n/**\n * This should fire off `ActivationStart` events for each route being activated at this\n * level.\n * In other words, if you're activating `a` and `b` below, `path` will contain the\n * `ActivatedRouteSnapshot`s for both and we will fire `ActivationStart` for both. Always\n * return\n * `true` so checks continue to run.\n */\nfunction fireActivationStart(\n    snapshot: ActivatedRouteSnapshot|null,\n    forwardEvent?: (evt: Event) => void): Observable<boolean> {\n  if (snapshot !== null && forwardEvent) {\n    forwardEvent(new ActivationStart(snapshot));\n  }\n  return of(true);\n}\n\n/**\n * This should fire off `ChildActivationStart` events for each route being activated at this\n * level.\n * In other words, if you're activating `a` and `b` below, `path` will contain the\n * `ActivatedRouteSnapshot`s for both and we will fire `ChildActivationStart` for both. Always\n * return\n * `true` so checks continue to run.\n */\nfunction fireChildActivationStart(\n    snapshot: ActivatedRouteSnapshot|null,\n    forwardEvent?: (evt: Event) => void): Observable<boolean> {\n  if (snapshot !== null && forwardEvent) {\n    forwardEvent(new ChildActivationStart(snapshot));\n  }\n  return of(true);\n}\n\nfunction runCanActivate(\n    futureRSS: RouterStateSnapshot, futureARS: ActivatedRouteSnapshot,\n    moduleInjector: Injector): Observable<boolean|UrlTree> {\n  const canActivate = futureARS.routeConfig ? futureARS.routeConfig.canActivate : null;\n  if (!canActivate || canActivate.length === 0) return of(true);\n\n  const canActivateObservables = canActivate.map((c: any) => {\n    return defer(() => {\n      const guard = getToken(c, futureARS, moduleInjector);\n      let observable;\n      if (isCanActivate(guard)) {\n        observable = wrapIntoObservable(guard.canActivate(futureARS, futureRSS));\n      } else if (isFunction<CanActivateFn>(guard)) {\n        observable = wrapIntoObservable(guard(futureARS, futureRSS));\n      } else {\n        throw new Error('Invalid CanActivate guard');\n      }\n      return observable.pipe(first());\n    });\n  });\n  return of(canActivateObservables).pipe(prioritizedGuardValue());\n}\n\nfunction runCanActivateChild(\n    futureRSS: RouterStateSnapshot, path: ActivatedRouteSnapshot[],\n    moduleInjector: Injector): Observable<boolean|UrlTree> {\n  const futureARS = path[path.length - 1];\n\n  const canActivateChildGuards = path.slice(0, path.length - 1)\n                                     .reverse()\n                                     .map(p => getCanActivateChild(p))\n                                     .filter(_ => _ !== null);\n\n  const canActivateChildGuardsMapped = canActivateChildGuards.map((d: any) => {\n    return defer(() => {\n      const guardsMapped = d.guards.map((c: any) => {\n        const guard = getToken(c, d.node, moduleInjector);\n        let observable;\n        if (isCanActivateChild(guard)) {\n          observable = wrapIntoObservable(guard.canActivateChild(futureARS, futureRSS));\n        } else if (isFunction<CanActivateChildFn>(guard)) {\n          observable = wrapIntoObservable(guard(futureARS, futureRSS));\n        } else {\n          throw new Error('Invalid CanActivateChild guard');\n        }\n        return observable.pipe(first());\n      });\n      return of(guardsMapped).pipe(prioritizedGuardValue());\n    });\n  });\n  return of(canActivateChildGuardsMapped).pipe(prioritizedGuardValue());\n}\n\nfunction runCanDeactivate(\n    component: Object|null, currARS: ActivatedRouteSnapshot, currRSS: RouterStateSnapshot,\n    futureRSS: RouterStateSnapshot, moduleInjector: Injector): Observable<boolean|UrlTree> {\n  const canDeactivate = currARS && currARS.routeConfig ? currARS.routeConfig.canDeactivate : null;\n  if (!canDeactivate || canDeactivate.length === 0) return of(true);\n  const canDeactivateObservables = canDeactivate.map((c: any) => {\n    const guard = getToken(c, currARS, moduleInjector);\n    let observable;\n    if (isCanDeactivate(guard)) {\n      observable = wrapIntoObservable(guard.canDeactivate(component!, currARS, currRSS, futureRSS));\n    } else if (isFunction<CanDeactivateFn<any>>(guard)) {\n      observable = wrapIntoObservable(guard(component, currARS, currRSS, futureRSS));\n    } else {\n      throw new Error('Invalid CanDeactivate guard');\n    }\n    return observable.pipe(first());\n  });\n  return of(canDeactivateObservables).pipe(prioritizedGuardValue());\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Type} from '@angular/core';\nimport {Observable, Observer, of} from 'rxjs';\n\nimport {Data, ResolveData, Route, Routes} from './config';\nimport {ActivatedRouteSnapshot, inheritedParamsDataResolve, ParamsInheritanceStrategy, RouterStateSnapshot} from './router_state';\nimport {defaultUrlMatcher, PRIMARY_OUTLET} from './shared';\nimport {mapChildrenIntoArray, UrlSegment, UrlSegmentGroup, UrlTree} from './url_tree';\nimport {forEach, last} from './utils/collection';\nimport {TreeNode} from './utils/tree';\n\nclass NoMatch {}\n\nexport function recognize(\n    rootComponentType: Type<any>|null, config: Routes, urlTree: UrlTree, url: string,\n    paramsInheritanceStrategy: ParamsInheritanceStrategy = 'emptyOnly',\n    relativeLinkResolution: 'legacy'|'corrected' = 'legacy'): Observable<RouterStateSnapshot> {\n  return new Recognizer(\n             rootComponentType, config, urlTree, url, paramsInheritanceStrategy,\n             relativeLinkResolution)\n      .recognize();\n}\n\nclass Recognizer {\n  constructor(\n      private rootComponentType: Type<any>|null, private config: Routes, private urlTree: UrlTree,\n      private url: string, private paramsInheritanceStrategy: ParamsInheritanceStrategy,\n      private relativeLinkResolution: 'legacy'|'corrected') {}\n\n  recognize(): Observable<RouterStateSnapshot> {\n    try {\n      const rootSegmentGroup =\n          split(this.urlTree.root, [], [], this.config, this.relativeLinkResolution).segmentGroup;\n\n      const children = this.processSegmentGroup(this.config, rootSegmentGroup, PRIMARY_OUTLET);\n\n      const root = new ActivatedRouteSnapshot(\n          [], Object.freeze({}), Object.freeze({...this.urlTree.queryParams}),\n          this.urlTree.fragment!, {}, PRIMARY_OUTLET, this.rootComponentType, null,\n          this.urlTree.root, -1, {});\n\n      const rootNode = new TreeNode<ActivatedRouteSnapshot>(root, children);\n      const routeState = new RouterStateSnapshot(this.url, rootNode);\n      this.inheritParamsAndData(routeState._root);\n      return of(routeState);\n\n    } catch (e) {\n      return new Observable<RouterStateSnapshot>(\n          (obs: Observer<RouterStateSnapshot>) => obs.error(e));\n    }\n  }\n\n  inheritParamsAndData(routeNode: TreeNode<ActivatedRouteSnapshot>): void {\n    const route = routeNode.value;\n\n    const i = inheritedParamsDataResolve(route, this.paramsInheritanceStrategy);\n    route.params = Object.freeze(i.params);\n    route.data = Object.freeze(i.data);\n\n    routeNode.children.forEach(n => this.inheritParamsAndData(n));\n  }\n\n  processSegmentGroup(config: Route[], segmentGroup: UrlSegmentGroup, outlet: string):\n      TreeNode<ActivatedRouteSnapshot>[] {\n    if (segmentGroup.segments.length === 0 && segmentGroup.hasChildren()) {\n      return this.processChildren(config, segmentGroup);\n    }\n\n    return this.processSegment(config, segmentGroup, segmentGroup.segments, outlet);\n  }\n\n  processChildren(config: Route[], segmentGroup: UrlSegmentGroup):\n      TreeNode<ActivatedRouteSnapshot>[] {\n    const children = mapChildrenIntoArray(\n        segmentGroup, (child, childOutlet) => this.processSegmentGroup(config, child, childOutlet));\n    checkOutletNameUniqueness(children);\n    sortActivatedRouteSnapshots(children);\n    return children;\n  }\n\n  processSegment(\n      config: Route[], segmentGroup: UrlSegmentGroup, segments: UrlSegment[],\n      outlet: string): TreeNode<ActivatedRouteSnapshot>[] {\n    for (const r of config) {\n      try {\n        return this.processSegmentAgainstRoute(r, segmentGroup, segments, outlet);\n      } catch (e) {\n        if (!(e instanceof NoMatch)) throw e;\n      }\n    }\n    if (this.noLeftoversInUrl(segmentGroup, segments, outlet)) {\n      return [];\n    }\n\n    throw new NoMatch();\n  }\n\n  private noLeftoversInUrl(segmentGroup: UrlSegmentGroup, segments: UrlSegment[], outlet: string):\n      boolean {\n    return segments.length === 0 && !segmentGroup.children[outlet];\n  }\n\n  processSegmentAgainstRoute(\n      route: Route, rawSegment: UrlSegmentGroup, segments: UrlSegment[],\n      outlet: string): TreeNode<ActivatedRouteSnapshot>[] {\n    if (route.redirectTo) throw new NoMatch();\n\n    if ((route.outlet || PRIMARY_OUTLET) !== outlet) throw new NoMatch();\n\n    let snapshot: ActivatedRouteSnapshot;\n    let consumedSegments: UrlSegment[] = [];\n    let rawSlicedSegments: UrlSegment[] = [];\n\n    if (route.path === '**') {\n      const params = segments.length > 0 ? last(segments)!.parameters : {};\n      snapshot = new ActivatedRouteSnapshot(\n          segments, params, Object.freeze({...this.urlTree.queryParams}), this.urlTree.fragment!,\n          getData(route), outlet, route.component!, route, getSourceSegmentGroup(rawSegment),\n          getPathIndexShift(rawSegment) + segments.length, getResolve(route));\n    } else {\n      const result: MatchResult = match(rawSegment, route, segments);\n      consumedSegments = result.consumedSegments;\n      rawSlicedSegments = segments.slice(result.lastChild);\n\n      snapshot = new ActivatedRouteSnapshot(\n          consumedSegments, result.parameters, Object.freeze({...this.urlTree.queryParams}),\n          this.urlTree.fragment!, getData(route), outlet, route.component!, route,\n          getSourceSegmentGroup(rawSegment),\n          getPathIndexShift(rawSegment) + consumedSegments.length, getResolve(route));\n    }\n\n    const childConfig: Route[] = getChildConfig(route);\n\n    const {segmentGroup, slicedSegments} = split(\n        rawSegment, consumedSegments, rawSlicedSegments, childConfig, this.relativeLinkResolution);\n\n    if (slicedSegments.length === 0 && segmentGroup.hasChildren()) {\n      const children = this.processChildren(childConfig, segmentGroup);\n      return [new TreeNode<ActivatedRouteSnapshot>(snapshot, children)];\n    }\n\n    if (childConfig.length === 0 && slicedSegments.length === 0) {\n      return [new TreeNode<ActivatedRouteSnapshot>(snapshot, [])];\n    }\n\n    const children = this.processSegment(childConfig, segmentGroup, slicedSegments, PRIMARY_OUTLET);\n    return [new TreeNode<ActivatedRouteSnapshot>(snapshot, children)];\n  }\n}\n\nfunction sortActivatedRouteSnapshots(nodes: TreeNode<ActivatedRouteSnapshot>[]): void {\n  nodes.sort((a, b) => {\n    if (a.value.outlet === PRIMARY_OUTLET) return -1;\n    if (b.value.outlet === PRIMARY_OUTLET) return 1;\n    return a.value.outlet.localeCompare(b.value.outlet);\n  });\n}\n\nfunction getChildConfig(route: Route): Route[] {\n  if (route.children) {\n    return route.children;\n  }\n\n  if (route.loadChildren) {\n    return route._loadedConfig!.routes;\n  }\n\n  return [];\n}\n\ninterface MatchResult {\n  consumedSegments: UrlSegment[];\n  lastChild: number;\n  parameters: any;\n}\n\nfunction match(segmentGroup: UrlSegmentGroup, route: Route, segments: UrlSegment[]): MatchResult {\n  if (route.path === '') {\n    if (route.pathMatch === 'full' && (segmentGroup.hasChildren() || segments.length > 0)) {\n      throw new NoMatch();\n    }\n\n    return {consumedSegments: [], lastChild: 0, parameters: {}};\n  }\n\n  const matcher = route.matcher || defaultUrlMatcher;\n  const res = matcher(segments, segmentGroup, route);\n  if (!res) throw new NoMatch();\n\n  const posParams: {[n: string]: string} = {};\n  forEach(res.posParams!, (v: UrlSegment, k: string) => {\n    posParams[k] = v.path;\n  });\n  const parameters = res.consumed.length > 0 ?\n      {...posParams, ...res.consumed[res.consumed.length - 1].parameters} :\n      posParams;\n\n  return {consumedSegments: res.consumed, lastChild: res.consumed.length, parameters};\n}\n\nfunction checkOutletNameUniqueness(nodes: TreeNode<ActivatedRouteSnapshot>[]): void {\n  const names: {[k: string]: ActivatedRouteSnapshot} = {};\n  nodes.forEach(n => {\n    const routeWithSameOutletName = names[n.value.outlet];\n    if (routeWithSameOutletName) {\n      const p = routeWithSameOutletName.url.map(s => s.toString()).join('/');\n      const c = n.value.url.map(s => s.toString()).join('/');\n      throw new Error(`Two segments cannot have the same outlet name: '${p}' and '${c}'.`);\n    }\n    names[n.value.outlet] = n.value;\n  });\n}\n\nfunction getSourceSegmentGroup(segmentGroup: UrlSegmentGroup): UrlSegmentGroup {\n  let s = segmentGroup;\n  while (s._sourceSegment) {\n    s = s._sourceSegment;\n  }\n  return s;\n}\n\nfunction getPathIndexShift(segmentGroup: UrlSegmentGroup): number {\n  let s = segmentGroup;\n  let res = (s._segmentIndexShift ? s._segmentIndexShift : 0);\n  while (s._sourceSegment) {\n    s = s._sourceSegment;\n    res += (s._segmentIndexShift ? s._segmentIndexShift : 0);\n  }\n  return res - 1;\n}\n\nfunction split(\n    segmentGroup: UrlSegmentGroup, consumedSegments: UrlSegment[], slicedSegments: UrlSegment[],\n    config: Route[], relativeLinkResolution: 'legacy'|'corrected') {\n  if (slicedSegments.length > 0 &&\n      containsEmptyPathMatchesWithNamedOutlets(segmentGroup, slicedSegments, config)) {\n    const s = new UrlSegmentGroup(\n        consumedSegments,\n        createChildrenForEmptyPaths(\n            segmentGroup, consumedSegments, config,\n            new UrlSegmentGroup(slicedSegments, segmentGroup.children)));\n    s._sourceSegment = segmentGroup;\n    s._segmentIndexShift = consumedSegments.length;\n    return {segmentGroup: s, slicedSegments: []};\n  }\n\n  if (slicedSegments.length === 0 &&\n      containsEmptyPathMatches(segmentGroup, slicedSegments, config)) {\n    const s = new UrlSegmentGroup(\n        segmentGroup.segments,\n        addEmptyPathsToChildrenIfNeeded(\n            segmentGroup, consumedSegments, slicedSegments, config, segmentGroup.children,\n            relativeLinkResolution));\n    s._sourceSegment = segmentGroup;\n    s._segmentIndexShift = consumedSegments.length;\n    return {segmentGroup: s, slicedSegments};\n  }\n\n  const s = new UrlSegmentGroup(segmentGroup.segments, segmentGroup.children);\n  s._sourceSegment = segmentGroup;\n  s._segmentIndexShift = consumedSegments.length;\n  return {segmentGroup: s, slicedSegments};\n}\n\nfunction addEmptyPathsToChildrenIfNeeded(\n    segmentGroup: UrlSegmentGroup, consumedSegments: UrlSegment[], slicedSegments: UrlSegment[],\n    routes: Route[], children: {[name: string]: UrlSegmentGroup},\n    relativeLinkResolution: 'legacy'|'corrected'): {[name: string]: UrlSegmentGroup} {\n  const res: {[name: string]: UrlSegmentGroup} = {};\n  for (const r of routes) {\n    if (emptyPathMatch(segmentGroup, slicedSegments, r) && !children[getOutlet(r)]) {\n      const s = new UrlSegmentGroup([], {});\n      s._sourceSegment = segmentGroup;\n      if (relativeLinkResolution === 'legacy') {\n        s._segmentIndexShift = segmentGroup.segments.length;\n      } else {\n        s._segmentIndexShift = consumedSegments.length;\n      }\n      res[getOutlet(r)] = s;\n    }\n  }\n  return {...children, ...res};\n}\n\nfunction createChildrenForEmptyPaths(\n    segmentGroup: UrlSegmentGroup, consumedSegments: UrlSegment[], routes: Route[],\n    primarySegment: UrlSegmentGroup): {[name: string]: UrlSegmentGroup} {\n  const res: {[name: string]: UrlSegmentGroup} = {};\n  res[PRIMARY_OUTLET] = primarySegment;\n  primarySegment._sourceSegment = segmentGroup;\n  primarySegment._segmentIndexShift = consumedSegments.length;\n\n  for (const r of routes) {\n    if (r.path === '' && getOutlet(r) !== PRIMARY_OUTLET) {\n      const s = new UrlSegmentGroup([], {});\n      s._sourceSegment = segmentGroup;\n      s._segmentIndexShift = consumedSegments.length;\n      res[getOutlet(r)] = s;\n    }\n  }\n  return res;\n}\n\nfunction containsEmptyPathMatchesWithNamedOutlets(\n    segmentGroup: UrlSegmentGroup, slicedSegments: UrlSegment[], routes: Route[]): boolean {\n  return routes.some(\n      r => emptyPathMatch(segmentGroup, slicedSegments, r) && getOutlet(r) !== PRIMARY_OUTLET);\n}\n\nfunction containsEmptyPathMatches(\n    segmentGroup: UrlSegmentGroup, slicedSegments: UrlSegment[], routes: Route[]): boolean {\n  return routes.some(r => emptyPathMatch(segmentGroup, slicedSegments, r));\n}\n\nfunction emptyPathMatch(\n    segmentGroup: UrlSegmentGroup, slicedSegments: UrlSegment[], r: Route): boolean {\n  if ((segmentGroup.hasChildren() || slicedSegments.length > 0) && r.pathMatch === 'full') {\n    return false;\n  }\n\n  return r.path === '' && r.redirectTo === undefined;\n}\n\nfunction getOutlet(route: Route): string {\n  return route.outlet || PRIMARY_OUTLET;\n}\n\nfunction getData(route: Route): Data {\n  return route.data || {};\n}\n\nfunction getResolve(route: Route): ResolveData {\n  return route.resolve || {};\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Type} from '@angular/core';\nimport {MonoTypeOperatorFunction, Observable} from 'rxjs';\nimport {map, mergeMap} from 'rxjs/operators';\n\nimport {Route} from '../config';\nimport {recognize as recognizeFn} from '../recognize';\nimport {NavigationTransition} from '../router';\nimport {UrlTree} from '../url_tree';\n\nexport function recognize(\n    rootComponentType: Type<any>|null, config: Route[], serializer: (url: UrlTree) => string,\n    paramsInheritanceStrategy: 'emptyOnly'|'always',\n    relativeLinkResolution: 'legacy'|'corrected'): MonoTypeOperatorFunction<NavigationTransition> {\n  return function(source: Observable<NavigationTransition>) {\n    return source.pipe(mergeMap(\n        t => recognizeFn(\n                 rootComponentType, config, t.urlAfterRedirects, serializer(t.urlAfterRedirects),\n                 paramsInheritanceStrategy, relativeLinkResolution)\n                 .pipe(map(targetSnapshot => ({...t, targetSnapshot})))));\n  };\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injector} from '@angular/core';\nimport {EMPTY, from, MonoTypeOperatorFunction, Observable, of} from 'rxjs';\nimport {concatMap, map, mergeMap, takeLast, tap} from 'rxjs/operators';\n\nimport {ResolveData} from '../config';\nimport {NavigationTransition} from '../router';\nimport {ActivatedRouteSnapshot, inheritedParamsDataResolve, RouterStateSnapshot} from '../router_state';\nimport {wrapIntoObservable} from '../utils/collection';\nimport {getToken} from '../utils/preactivation';\n\nexport function resolveData(\n    paramsInheritanceStrategy: 'emptyOnly'|'always',\n    moduleInjector: Injector): MonoTypeOperatorFunction<NavigationTransition> {\n  return function(source: Observable<NavigationTransition>) {\n    return source.pipe(mergeMap(t => {\n      const {targetSnapshot, guards: {canActivateChecks}} = t;\n\n      if (!canActivateChecks.length) {\n        return of(t);\n      }\n      let canActivateChecksResolved = 0;\n      return from(canActivateChecks)\n          .pipe(\n              concatMap(\n                  check => runResolve(\n                      check.route, targetSnapshot!, paramsInheritanceStrategy, moduleInjector)),\n              tap(() => canActivateChecksResolved++),\n              takeLast(1),\n              mergeMap(_ => canActivateChecksResolved === canActivateChecks.length ? of(t) : EMPTY),\n          );\n    }));\n  };\n}\n\nfunction runResolve(\n    futureARS: ActivatedRouteSnapshot, futureRSS: RouterStateSnapshot,\n    paramsInheritanceStrategy: 'emptyOnly'|'always', moduleInjector: Injector) {\n  const resolve = futureARS._resolve;\n  return resolveNode(resolve, futureARS, futureRSS, moduleInjector)\n      .pipe(map((resolvedData: any) => {\n        futureARS._resolvedData = resolvedData;\n        futureARS.data = {\n          ...futureARS.data,\n          ...inheritedParamsDataResolve(futureARS, paramsInheritanceStrategy).resolve\n        };\n        return null;\n      }));\n}\n\nfunction resolveNode(\n    resolve: ResolveData, futureARS: ActivatedRouteSnapshot, futureRSS: RouterStateSnapshot,\n    moduleInjector: Injector): Observable<any> {\n  const keys = Object.keys(resolve);\n  if (keys.length === 0) {\n    return of({});\n  }\n  const data: {[k: string]: any} = {};\n  return from(keys).pipe(\n      mergeMap(\n          (key: string) => getResolver(resolve[key], futureARS, futureRSS, moduleInjector)\n                               .pipe(tap((value: any) => {\n                                 data[key] = value;\n                               }))),\n      takeLast(1),\n      mergeMap(() => {\n        // Ensure all resolvers returned values, otherwise don't emit any \"next\" and just complete\n        // the chain which will cancel navigation\n        if (Object.keys(data).length === keys.length) {\n          return of(data);\n        }\n        return EMPTY;\n      }),\n  );\n}\n\nfunction getResolver(\n    injectionToken: any, futureARS: ActivatedRouteSnapshot, futureRSS: RouterStateSnapshot,\n    moduleInjector: Injector): Observable<any> {\n  const resolver = getToken(injectionToken, futureARS, moduleInjector);\n  return resolver.resolve ? wrapIntoObservable(resolver.resolve(futureARS, futureRSS)) :\n                            wrapIntoObservable(resolver(futureARS, futureRSS));\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {from, MonoTypeOperatorFunction, ObservableInput} from 'rxjs';\nimport {map, switchMap} from 'rxjs/operators';\n\n/**\n * Perform a side effect through a switchMap for every emission on the source Observable,\n * but return an Observable that is identical to the source. It's essentially the same as\n * the `tap` operator, but if the side effectful `next` function returns an ObservableInput,\n * it will wait before continuing with the original value.\n */\nexport function switchTap<T>(next: (x: T) => void|ObservableInput<any>):\n    MonoTypeOperatorFunction<T> {\n  return function(source) {\n    return source.pipe(switchMap(v => {\n      const nextResult = next(v);\n      if (nextResult) {\n        return from(nextResult).pipe(map(() => v));\n      }\n      return from([v]);\n    }));\n  };\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ComponentRef} from '@angular/core';\n\nimport {OutletContext} from './router_outlet_context';\nimport {ActivatedRoute, ActivatedRouteSnapshot} from './router_state';\nimport {TreeNode} from './utils/tree';\n\n/**\n * @description\n *\n * Represents the detached route tree.\n *\n * This is an opaque value the router will give to a custom route reuse strategy\n * to store and retrieve later on.\n *\n * @publicApi\n */\nexport type DetachedRouteHandle = {};\n\n/** @internal */\nexport type DetachedRouteHandleInternal = {\n  contexts: Map<string, OutletContext>,\n  componentRef: ComponentRef<any>,\n  route: TreeNode<ActivatedRoute>,\n};\n\n/**\n * @description\n *\n * Provides a way to customize when activated routes get reused.\n *\n * @publicApi\n */\nexport abstract class RouteReuseStrategy {\n  /** Determines if this route (and its subtree) should be detached to be reused later */\n  abstract shouldDetach(route: ActivatedRouteSnapshot): boolean;\n\n  /**\n   * Stores the detached route.\n   *\n   * Storing a `null` value should erase the previously stored value.\n   */\n  abstract store(route: ActivatedRouteSnapshot, handle: DetachedRouteHandle|null): void;\n\n  /** Determines if this route (and its subtree) should be reattached */\n  abstract shouldAttach(route: ActivatedRouteSnapshot): boolean;\n\n  /** Retrieves the previously stored route */\n  abstract retrieve(route: ActivatedRouteSnapshot): DetachedRouteHandle|null;\n\n  /** Determines if a route should be reused */\n  abstract shouldReuseRoute(future: ActivatedRouteSnapshot, curr: ActivatedRouteSnapshot): boolean;\n}\n\n/**\n * @description\n *\n * This base route reuse strategy only reuses routes when the matched router configs are\n * identical. This prevents components from being destroyed and recreated\n * when just the fragment or query parameters change\n * (that is, the existing component is _reused_).\n *\n * This strategy does not store any routes for later reuse.\n *\n * Angular uses this strategy by default.\n *\n *\n * It can be used as a base class for custom route reuse strategies, i.e. you can create your own\n * class that extends the `BaseRouteReuseStrategy` one.\n * @publicApi\n */\nexport abstract class BaseRouteReuseStrategy implements RouteReuseStrategy {\n  /**\n   * Whether the given route should detach for later reuse.\n   * Always returns false for `BaseRouteReuseStrategy`.\n   * */\n  shouldDetach(route: ActivatedRouteSnapshot): boolean {\n    return false;\n  }\n\n  /**\n   * A no-op; the route is never stored since this strategy never detaches routes for later re-use.\n   */\n  store(route: ActivatedRouteSnapshot, detachedTree: DetachedRouteHandle): void {}\n\n  /** Returns `false`, meaning the route (and its subtree) is never reattached */\n  shouldAttach(route: ActivatedRouteSnapshot): boolean {\n    return false;\n  }\n\n  /** Returns `null` because this strategy does not store routes for later re-use. */\n  retrieve(route: ActivatedRouteSnapshot): DetachedRouteHandle|null {\n    return null;\n  }\n\n  /**\n   * Determines if a route should be reused.\n   * This strategy returns `true` when the future route config and current route config are\n   * identical.\n   */\n  shouldReuseRoute(future: ActivatedRouteSnapshot, curr: ActivatedRouteSnapshot): boolean {\n    return future.routeConfig === curr.routeConfig;\n  }\n}\n\nexport class DefaultRouteReuseStrategy extends BaseRouteReuseStrategy {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Component} from '@angular/core';\n\n/**\n * This component is used internally within the router to be a placeholder when an empty\n * router-outlet is needed. For example, with a config such as:\n *\n * `{path: 'parent', outlet: 'nav', children: [...]}`\n *\n * In order to render, there needs to be a component on this config, which will default\n * to this `EmptyOutletComponent`.\n */\n@Component({template: `<router-outlet></router-outlet>`})\nexport class ɵEmptyOutletComponent {\n}\n\nexport {ɵEmptyOutletComponent as EmptyOutletComponent};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {EmptyOutletComponent} from '../components/empty_outlet';\nimport {Route, Routes} from '../config';\nimport {PRIMARY_OUTLET} from '../shared';\n\nexport function validateConfig(config: Routes, parentPath: string = ''): void {\n  // forEach doesn't iterate undefined values\n  for (let i = 0; i < config.length; i++) {\n    const route: Route = config[i];\n    const fullPath: string = getFullPath(parentPath, route);\n    validateNode(route, fullPath);\n  }\n}\n\nfunction validateNode(route: Route, fullPath: string): void {\n  if (!route) {\n    throw new Error(`\n      Invalid configuration of route '${fullPath}': Encountered undefined route.\n      The reason might be an extra comma.\n\n      Example:\n      const routes: Routes = [\n        { path: '', redirectTo: '/dashboard', pathMatch: 'full' },\n        { path: 'dashboard',  component: DashboardComponent },, << two commas\n        { path: 'detail/:id', component: HeroDetailComponent }\n      ];\n    `);\n  }\n  if (Array.isArray(route)) {\n    throw new Error(`Invalid configuration of route '${fullPath}': Array cannot be specified`);\n  }\n  if (!route.component && !route.children && !route.loadChildren &&\n      (route.outlet && route.outlet !== PRIMARY_OUTLET)) {\n    throw new Error(`Invalid configuration of route '${\n        fullPath}': a componentless route without children or loadChildren cannot have a named outlet set`);\n  }\n  if (route.redirectTo && route.children) {\n    throw new Error(`Invalid configuration of route '${\n        fullPath}': redirectTo and children cannot be used together`);\n  }\n  if (route.redirectTo && route.loadChildren) {\n    throw new Error(`Invalid configuration of route '${\n        fullPath}': redirectTo and loadChildren cannot be used together`);\n  }\n  if (route.children && route.loadChildren) {\n    throw new Error(`Invalid configuration of route '${\n        fullPath}': children and loadChildren cannot be used together`);\n  }\n  if (route.redirectTo && route.component) {\n    throw new Error(`Invalid configuration of route '${\n        fullPath}': redirectTo and component cannot be used together`);\n  }\n  if (route.path && route.matcher) {\n    throw new Error(\n        `Invalid configuration of route '${fullPath}': path and matcher cannot be used together`);\n  }\n  if (route.redirectTo === void 0 && !route.component && !route.children && !route.loadChildren) {\n    throw new Error(`Invalid configuration of route '${\n        fullPath}'. One of the following must be provided: component, redirectTo, children or loadChildren`);\n  }\n  if (route.path === void 0 && route.matcher === void 0) {\n    throw new Error(`Invalid configuration of route '${\n        fullPath}': routes must have either a path or a matcher specified`);\n  }\n  if (typeof route.path === 'string' && route.path.charAt(0) === '/') {\n    throw new Error(`Invalid configuration of route '${fullPath}': path cannot start with a slash`);\n  }\n  if (route.path === '' && route.redirectTo !== void 0 && route.pathMatch === void 0) {\n    const exp =\n        `The default value of 'pathMatch' is 'prefix', but often the intent is to use 'full'.`;\n    throw new Error(`Invalid configuration of route '{path: \"${fullPath}\", redirectTo: \"${\n        route.redirectTo}\"}': please provide 'pathMatch'. ${exp}`);\n  }\n  if (route.pathMatch !== void 0 && route.pathMatch !== 'full' && route.pathMatch !== 'prefix') {\n    throw new Error(`Invalid configuration of route '${\n        fullPath}': pathMatch can only be set to 'prefix' or 'full'`);\n  }\n  if (route.children) {\n    validateConfig(route.children, fullPath);\n  }\n}\n\nfunction getFullPath(parentPath: string, currentRoute: Route): string {\n  if (!currentRoute) {\n    return parentPath;\n  }\n  if (!parentPath && !currentRoute.path) {\n    return '';\n  } else if (parentPath && !currentRoute.path) {\n    return `${parentPath}/`;\n  } else if (!parentPath && currentRoute.path) {\n    return currentRoute.path;\n  } else {\n    return `${parentPath}/${currentRoute.path}`;\n  }\n}\n\n/**\n * Makes a copy of the config and adds any default required properties.\n */\nexport function standardizeConfig(r: Route): Route {\n  const children = r.children && r.children.map(standardizeConfig);\n  const c = children ? {...r, children} : {...r};\n  if (!c.component && (children || c.loadChildren) && (c.outlet && c.outlet !== PRIMARY_OUTLET)) {\n    c.component = EmptyOutletComponent;\n  }\n  return c;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Compiler, InjectionToken, Injector, NgModuleFactory, NgModuleFactoryLoader} from '@angular/core';\nimport {from, Observable, of} from 'rxjs';\nimport {map, mergeMap} from 'rxjs/operators';\n\nimport {LoadChildren, LoadedRouterConfig, Route} from './config';\nimport {flatten, wrapIntoObservable} from './utils/collection';\nimport {standardizeConfig} from './utils/config';\n\n/**\n * The [DI token](guide/glossary/#di-token) for a router configuration.\n * @see `ROUTES`\n * @publicApi\n */\nexport const ROUTES = new InjectionToken<Route[][]>('ROUTES');\n\nexport class RouterConfigLoader {\n  constructor(\n      private loader: NgModuleFactoryLoader, private compiler: Compiler,\n      private onLoadStartListener?: (r: Route) => void,\n      private onLoadEndListener?: (r: Route) => void) {}\n\n  load(parentInjector: Injector, route: Route): Observable<LoadedRouterConfig> {\n    if (this.onLoadStartListener) {\n      this.onLoadStartListener(route);\n    }\n\n    const moduleFactory$ = this.loadModuleFactory(route.loadChildren!);\n\n    return moduleFactory$.pipe(map((factory: NgModuleFactory<any>) => {\n      if (this.onLoadEndListener) {\n        this.onLoadEndListener(route);\n      }\n\n      const module = factory.create(parentInjector);\n\n      return new LoadedRouterConfig(\n          flatten(module.injector.get(ROUTES)).map(standardizeConfig), module);\n    }));\n  }\n\n  private loadModuleFactory(loadChildren: LoadChildren): Observable<NgModuleFactory<any>> {\n    if (typeof loadChildren === 'string') {\n      return from(this.loader.load(loadChildren));\n    } else {\n      return wrapIntoObservable(loadChildren()).pipe(mergeMap((t: any) => {\n        if (t instanceof NgModuleFactory) {\n          return of(t);\n        } else {\n          return from(this.compiler.compileModuleAsync(t));\n        }\n      }));\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ComponentFactoryResolver, ComponentRef} from '@angular/core';\n\nimport {RouterOutlet} from './directives/router_outlet';\nimport {ActivatedRoute} from './router_state';\n\n\n/**\n * Store contextual information about a `RouterOutlet`\n *\n * @publicApi\n */\nexport class OutletContext {\n  outlet: RouterOutlet|null = null;\n  route: ActivatedRoute|null = null;\n  resolver: ComponentFactoryResolver|null = null;\n  children = new ChildrenOutletContexts();\n  attachRef: ComponentRef<any>|null = null;\n}\n\n/**\n * Store contextual information about the children (= nested) `RouterOutlet`\n *\n * @publicApi\n */\nexport class ChildrenOutletContexts {\n  // contexts for child outlets, by name.\n  private contexts = new Map<string, OutletContext>();\n\n  /** Called when a `RouterOutlet` directive is instantiated */\n  onChildOutletCreated(childName: string, outlet: RouterOutlet): void {\n    const context = this.getOrCreateContext(childName);\n    context.outlet = outlet;\n    this.contexts.set(childName, context);\n  }\n\n  /**\n   * Called when a `RouterOutlet` directive is destroyed.\n   * We need to keep the context as the outlet could be destroyed inside a NgIf and might be\n   * re-created later.\n   */\n  onChildOutletDestroyed(childName: string): void {\n    const context = this.getContext(childName);\n    if (context) {\n      context.outlet = null;\n    }\n  }\n\n  /**\n   * Called when the corresponding route is deactivated during navigation.\n   * Because the component get destroyed, all children outlet are destroyed.\n   */\n  onOutletDeactivated(): Map<string, OutletContext> {\n    const contexts = this.contexts;\n    this.contexts = new Map();\n    return contexts;\n  }\n\n  onOutletReAttached(contexts: Map<string, OutletContext>) {\n    this.contexts = contexts;\n  }\n\n  getOrCreateContext(childName: string): OutletContext {\n    let context = this.getContext(childName);\n\n    if (!context) {\n      context = new OutletContext();\n      this.contexts.set(childName, context);\n    }\n\n    return context;\n  }\n\n  getContext(childName: string): OutletContext|null {\n    return this.contexts.get(childName) || null;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {UrlTree} from './url_tree';\n\n/**\n * @description\n *\n * Provides a way to migrate AngularJS applications to Angular.\n *\n * @publicApi\n */\nexport abstract class UrlHandlingStrategy {\n  /**\n   * Tells the router if this URL should be processed.\n   *\n   * When it returns true, the router will execute the regular navigation.\n   * When it returns false, the router will set the router state to an empty state.\n   * As a result, all the active components will be destroyed.\n   *\n   */\n  abstract shouldProcessUrl(url: UrlTree): boolean;\n\n  /**\n   * Extracts the part of the URL that should be handled by the router.\n   * The rest of the URL will remain untouched.\n   */\n  abstract extract(url: UrlTree): UrlTree;\n\n  /**\n   * Merges the URL fragment with the rest of the URL.\n   */\n  abstract merge(newUrlPart: UrlTree, rawUrl: UrlTree): UrlTree;\n}\n\n/**\n * @publicApi\n */\nexport class DefaultUrlHandlingStrategy implements UrlHandlingStrategy {\n  shouldProcessUrl(url: UrlTree): boolean {\n    return true;\n  }\n  extract(url: UrlTree): UrlTree {\n    return url;\n  }\n  merge(newUrlPart: UrlTree, wholeUrl: UrlTree): UrlTree {\n    return newUrlPart;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Location, PopStateEvent} from '@angular/common';\nimport {Compiler, Injectable, Injector, isDevMode, NgModuleFactoryLoader, NgModuleRef, NgZone, Type, ɵConsole as Console} from '@angular/core';\nimport {BehaviorSubject, EMPTY, Observable, of, Subject, SubscriptionLike} from 'rxjs';\nimport {catchError, filter, finalize, map, switchMap, tap} from 'rxjs/operators';\n\nimport {QueryParamsHandling, Route, Routes} from './config';\nimport {createRouterState} from './create_router_state';\nimport {createUrlTree} from './create_url_tree';\nimport {Event, GuardsCheckEnd, GuardsCheckStart, NavigationCancel, NavigationEnd, NavigationError, NavigationStart, NavigationTrigger, ResolveEnd, ResolveStart, RouteConfigLoadEnd, RouteConfigLoadStart, RoutesRecognized} from './events';\nimport {activateRoutes} from './operators/activate_routes';\nimport {applyRedirects} from './operators/apply_redirects';\nimport {checkGuards} from './operators/check_guards';\nimport {recognize} from './operators/recognize';\nimport {resolveData} from './operators/resolve_data';\nimport {switchTap} from './operators/switch_tap';\nimport {DefaultRouteReuseStrategy, RouteReuseStrategy} from './route_reuse_strategy';\nimport {RouterConfigLoader} from './router_config_loader';\nimport {ChildrenOutletContexts} from './router_outlet_context';\nimport {ActivatedRoute, createEmptyState, RouterState, RouterStateSnapshot} from './router_state';\nimport {isNavigationCancelingError, navigationCancelingError, Params} from './shared';\nimport {DefaultUrlHandlingStrategy, UrlHandlingStrategy} from './url_handling_strategy';\nimport {containsTree, createEmptyUrlTree, UrlSerializer, UrlTree} from './url_tree';\nimport {standardizeConfig, validateConfig} from './utils/config';\nimport {Checks, getAllRouteGuards} from './utils/preactivation';\nimport {isUrlTree} from './utils/type_guards';\n\n\n/**\n * @description\n *\n * Options that modify the `Router` navigation strategy.\n * Supply an object containing any of these properties to a `Router` navigation function to\n * control how the target URL should be constructed or interpreted.\n *\n * @see [Router.navigate() method](api/router/Router#navigate)\n * @see [Router.navigateByUrl() method](api/router/Router#navigatebyurl)\n * @see [Router.createUrlTree() method](api/router/Router#createurltree)\n * @see [Routing and Navigation guide](guide/router)\n *\n * @publicApi\n */\nexport interface NavigationExtras {\n  /**\n   * Specifies a root URI to use for relative navigation.\n   *\n   * For example, consider the following route configuration where the parent route\n   * has two children.\n   *\n   * ```\n   * [{\n   *   path: 'parent',\n   *   component: ParentComponent,\n   *   children: [{\n   *     path: 'list',\n   *     component: ListComponent\n   *   },{\n   *     path: 'child',\n   *     component: ChildComponent\n   *   }]\n   * }]\n   * ```\n   *\n   * The following `go()` function navigates to the `list` route by\n   * interpreting the destination URI as relative to the activated `child`  route\n   *\n   * ```\n   *  @Component({...})\n   *  class ChildComponent {\n   *    constructor(private router: Router, private route: ActivatedRoute) {}\n   *\n   *    go() {\n   *      this.router.navigate(['../list'], { relativeTo: this.route });\n   *    }\n   *  }\n   * ```\n   */\n  relativeTo?: ActivatedRoute|null;\n\n  /**\n   * Sets query parameters to the URL.\n   *\n   * ```\n   * // Navigate to /results?page=1\n   * this.router.navigate(['/results'], { queryParams: { page: 1 } });\n   * ```\n   */\n  queryParams?: Params|null;\n\n  /**\n   * Sets the hash fragment for the URL.\n   *\n   * ```\n   * // Navigate to /results#top\n   * this.router.navigate(['/results'], { fragment: 'top' });\n   * ```\n   */\n  fragment?: string;\n\n  /**\n   * **DEPRECATED**: Use `queryParamsHandling: \"preserve\"` instead to preserve\n   * query parameters for the next navigation.\n   *\n   * @deprecated since v4\n   */\n  preserveQueryParams?: boolean;\n\n  /**\n   * How to handle query parameters in the router link for the next navigation.\n   * One of:\n   * * `preserve` : Preserve current parameters.\n   * * `merge` : Merge new with current parameters.\n   *\n   * The \"preserve\" option discards any new query params:\n   * ```\n   * // from /view1?page=1 to/view2?page=1\n   * this.router.navigate(['/view2'], { queryParams: { page: 2 },  queryParamsHandling: \"preserve\"\n   * });\n   * ```\n   * The \"merge\" option appends new query params to the params from the current URL:\n   * ```\n   * // from /view1?page=1 to/view2?page=1&otherKey=2\n   * this.router.navigate(['/view2'], { queryParams: { otherKey: 2 },  queryParamsHandling: \"merge\"\n   * });\n   * ```\n   * In case of a key collision between current parameters and those in the `queryParams` object,\n   * the new value is used.\n   *\n   */\n  queryParamsHandling?: QueryParamsHandling|null;\n  /**\n   * When true, preserves the URL fragment for the next navigation\n   *\n   * ```\n   * // Preserve fragment from /results#top to /view#top\n   * this.router.navigate(['/view'], { preserveFragment: true });\n   * ```\n   */\n  preserveFragment?: boolean;\n  /**\n   * When true, navigates without pushing a new state into history.\n   *\n   * ```\n   * // Navigate silently to /view\n   * this.router.navigate(['/view'], { skipLocationChange: true });\n   * ```\n   */\n  skipLocationChange?: boolean;\n  /**\n   * When true, navigates while replacing the current state in history.\n   *\n   * ```\n   * // Navigate to /view\n   * this.router.navigate(['/view'], { replaceUrl: true });\n   * ```\n   */\n  replaceUrl?: boolean;\n  /**\n   * Developer-defined state that can be passed to any navigation.\n   * Access this value through the `Navigation.extras` object\n   * returned from the [Router.getCurrentNavigation()\n   * method](api/router/Router#getcurrentnavigation) while a navigation is executing.\n   *\n   * After a navigation completes, the router writes an object containing this\n   * value together with a `navigationId` to `history.state`.\n   * The value is written when `location.go()` or `location.replaceState()`\n   * is called before activating this route.\n   *\n   * Note that `history.state` does not pass an object equality test because\n   * the router adds the `navigationId` on each navigation.\n   *\n   */\n  state?: {[k: string]: any};\n}\n\n/**\n * Error handler that is invoked when a navigation error occurs.\n *\n * If the handler returns a value, the navigation Promise is resolved with this value.\n * If the handler throws an exception, the navigation Promise is rejected with\n * the exception.\n *\n * @publicApi\n */\nexport type ErrorHandler = (error: any) => any;\n\nfunction defaultErrorHandler(error: any): any {\n  throw error;\n}\n\nfunction defaultMalformedUriErrorHandler(\n    error: URIError, urlSerializer: UrlSerializer, url: string): UrlTree {\n  return urlSerializer.parse('/');\n}\n\nexport type RestoredState = {\n  [k: string]: any; navigationId: number;\n};\n\n/**\n * Information about a navigation operation.\n * Retrieve the most recent navigation object with the\n * [Router.getCurrentNavigation() method](api/router/Router#getcurrentnavigation) .\n *\n * * *id* : The unique identifier of the current navigation.\n * * *initialUrl* : The target URL passed into the `Router#navigateByUrl()` call before navigation.\n * This is the value before the router has parsed or applied redirects to it.\n * * *extractedUrl* : The initial target URL after being parsed with `UrlSerializer.extract()`.\n * * *finalUrl* : The extracted URL after redirects have been applied.\n * This URL may not be available immediately, therefore this property can be `undefined`.\n * It is guaranteed to be set after the `RoutesRecognized` event fires.\n * * *trigger* : Identifies how this navigation was triggered.\n * -- 'imperative'--Triggered by `router.navigateByUrl` or `router.navigate`.\n * -- 'popstate'--Triggered by a popstate event.\n * -- 'hashchange'--Triggered by a hashchange event.\n * * *extras* : A `NavigationExtras` options object that controlled the strategy used for this\n * navigation.\n * * *previousNavigation* : The previously successful `Navigation` object. Only one previous\n * navigation is available, therefore this previous `Navigation` object has a `null` value for its\n * own `previousNavigation`.\n *\n * @publicApi\n */\nexport type Navigation = {\n  /**\n   * The unique identifier of the current navigation.\n   */\n  id: number;\n  /**\n   * The target URL passed into the `Router#navigateByUrl()` call before navigation. This is\n   * the value before the router has parsed or applied redirects to it.\n   */\n  initialUrl: string | UrlTree;\n  /**\n   * The initial target URL after being parsed with `UrlSerializer.extract()`.\n   */\n  extractedUrl: UrlTree;\n  /**\n   * The extracted URL after redirects have been applied.\n   * This URL may not be available immediately, therefore this property can be `undefined`.\n   * It is guaranteed to be set after the `RoutesRecognized` event fires.\n   */\n  finalUrl?: UrlTree;\n  /**\n   * Identifies how this navigation was triggered.\n   *\n   * * 'imperative'--Triggered by `router.navigateByUrl` or `router.navigate`.\n   * * 'popstate'--Triggered by a popstate event.\n   * * 'hashchange'--Triggered by a hashchange event.\n   */\n  trigger: 'imperative' | 'popstate' | 'hashchange';\n  /**\n   * Options that controlled the strategy used for this navigation.\n   * See `NavigationExtras`.\n   */\n  extras: NavigationExtras;\n  /**\n   * The previously successful `Navigation` object. Only one previous navigation\n   * is available, therefore this previous `Navigation` object has a `null` value\n   * for its own `previousNavigation`.\n   */\n  previousNavigation: Navigation | null;\n};\n\nexport type NavigationTransition = {\n  id: number,\n  currentUrlTree: UrlTree,\n  currentRawUrl: UrlTree,\n  extractedUrl: UrlTree,\n  urlAfterRedirects: UrlTree,\n  rawUrl: UrlTree,\n  extras: NavigationExtras,\n  resolve: any,\n  reject: any,\n  promise: Promise<boolean>,\n  source: NavigationTrigger,\n  restoredState: RestoredState|null,\n  currentSnapshot: RouterStateSnapshot,\n  targetSnapshot: RouterStateSnapshot|null,\n  currentRouterState: RouterState,\n  targetRouterState: RouterState|null,\n  guards: Checks,\n  guardsResult: boolean|UrlTree|null,\n};\n\n/**\n * @internal\n */\nexport type RouterHook = (snapshot: RouterStateSnapshot, runExtras: {\n  appliedUrlTree: UrlTree,\n  rawUrlTree: UrlTree,\n  skipLocationChange: boolean,\n  replaceUrl: boolean,\n  navigationId: number\n}) => Observable<void>;\n\n/**\n * @internal\n */\nfunction defaultRouterHook(snapshot: RouterStateSnapshot, runExtras: {\n  appliedUrlTree: UrlTree,\n  rawUrlTree: UrlTree,\n  skipLocationChange: boolean,\n  replaceUrl: boolean,\n  navigationId: number\n}): Observable<void> {\n  return of(null) as any;\n}\n\n/**\n * Information related to a location change, necessary for scheduling follow-up Router navigations.\n */\ntype LocationChangeInfo = {\n  source: 'popstate'|'hashchange',\n  urlTree: UrlTree,\n  state: RestoredState|null,\n  transitionId: number\n};\n\n/**\n * @description\n *\n * A service that provides navigation among views and URL manipulation capabilities.\n *\n * @see `Route`.\n * @see [Routing and Navigation Guide](guide/router).\n *\n * @ngModule RouterModule\n *\n * @publicApi\n */\n@Injectable()\nexport class Router {\n  private currentUrlTree: UrlTree;\n  private rawUrlTree: UrlTree;\n  private browserUrlTree: UrlTree;\n  private readonly transitions: BehaviorSubject<NavigationTransition>;\n  private navigations: Observable<NavigationTransition>;\n  private lastSuccessfulNavigation: Navigation|null = null;\n  private currentNavigation: Navigation|null = null;\n\n  private locationSubscription?: SubscriptionLike;\n  /**\n   * Tracks the previously seen location change from the location subscription so we can compare\n   * the two latest to see if they are duplicates. See setUpLocationChangeListener.\n   */\n  private lastLocationChangeInfo: LocationChangeInfo|null = null;\n  private navigationId: number = 0;\n  private configLoader: RouterConfigLoader;\n  private ngModule: NgModuleRef<any>;\n  private console: Console;\n  private isNgZoneEnabled: boolean = false;\n\n  /**\n   * An event stream for routing events in this NgModule.\n   */\n  public readonly events: Observable<Event> = new Subject<Event>();\n  /**\n   * The current state of routing in this NgModule.\n   */\n  public readonly routerState: RouterState;\n\n  /**\n   * A handler for navigation errors in this NgModule.\n   */\n  errorHandler: ErrorHandler = defaultErrorHandler;\n\n  /**\n   * A handler for errors thrown by `Router.parseUrl(url)`\n   * when `url` contains an invalid character.\n   * The most common case is a `%` sign\n   * that's not encoded and is not part of a percent encoded sequence.\n   */\n  malformedUriErrorHandler:\n      (error: URIError, urlSerializer: UrlSerializer,\n       url: string) => UrlTree = defaultMalformedUriErrorHandler;\n\n  /**\n   * True if at least one navigation event has occurred,\n   * false otherwise.\n   */\n  navigated: boolean = false;\n  private lastSuccessfulId: number = -1;\n\n  /**\n   * Hooks that enable you to pause navigation,\n   * either before or after the preactivation phase.\n   * Used by `RouterModule`.\n   *\n   * @internal\n   */\n  hooks: {\n    beforePreactivation: RouterHook,\n    afterPreactivation: RouterHook\n  } = {beforePreactivation: defaultRouterHook, afterPreactivation: defaultRouterHook};\n\n  /**\n   * A strategy for extracting and merging URLs.\n   * Used for AngularJS to Angular migrations.\n   */\n  urlHandlingStrategy: UrlHandlingStrategy = new DefaultUrlHandlingStrategy();\n\n  /**\n   * A strategy for re-using routes.\n   */\n  routeReuseStrategy: RouteReuseStrategy = new DefaultRouteReuseStrategy();\n\n  /**\n   * How to handle a navigation request to the current URL. One of:\n   * - `'ignore'` :  The router ignores the request.\n   * - `'reload'` : The router reloads the URL. Use to implement a \"refresh\" feature.\n   */\n  onSameUrlNavigation: 'reload'|'ignore' = 'ignore';\n\n  /**\n   * How to merge parameters, data, and resolved data from parent to child\n   * routes. One of:\n   *\n   * - `'emptyOnly'` : Inherit parent parameters, data, and resolved data\n   * for path-less or component-less routes.\n   * - `'always'` : Inherit parent parameters, data, and resolved data\n   * for all child routes.\n   */\n  paramsInheritanceStrategy: 'emptyOnly'|'always' = 'emptyOnly';\n\n  /**\n   * Determines when the router updates the browser URL.\n   * By default (`\"deferred\"`), updates the browser URL after navigation has finished.\n   * Set to `'eager'` to update the browser URL at the beginning of navigation.\n   * You can choose to update early so that, if navigation fails,\n   * you can show an error message with the URL that failed.\n   */\n  urlUpdateStrategy: 'deferred'|'eager' = 'deferred';\n\n  /**\n   * Enables a bug fix that corrects relative link resolution in components with empty paths.\n   * @see `RouterModule`\n   */\n  relativeLinkResolution: 'legacy'|'corrected' = 'legacy';\n\n  /**\n   * Creates the router service.\n   */\n  // TODO: vsavkin make internal after the final is out.\n  constructor(\n      private rootComponentType: Type<any>|null, private urlSerializer: UrlSerializer,\n      private rootContexts: ChildrenOutletContexts, private location: Location, injector: Injector,\n      loader: NgModuleFactoryLoader, compiler: Compiler, public config: Routes) {\n    const onLoadStart = (r: Route) => this.triggerEvent(new RouteConfigLoadStart(r));\n    const onLoadEnd = (r: Route) => this.triggerEvent(new RouteConfigLoadEnd(r));\n\n    this.ngModule = injector.get(NgModuleRef);\n    this.console = injector.get(Console);\n    const ngZone = injector.get(NgZone);\n    this.isNgZoneEnabled = ngZone instanceof NgZone;\n\n    this.resetConfig(config);\n    this.currentUrlTree = createEmptyUrlTree();\n    this.rawUrlTree = this.currentUrlTree;\n    this.browserUrlTree = this.currentUrlTree;\n\n    this.configLoader = new RouterConfigLoader(loader, compiler, onLoadStart, onLoadEnd);\n    this.routerState = createEmptyState(this.currentUrlTree, this.rootComponentType);\n\n    this.transitions = new BehaviorSubject<NavigationTransition>({\n      id: 0,\n      currentUrlTree: this.currentUrlTree,\n      currentRawUrl: this.currentUrlTree,\n      extractedUrl: this.urlHandlingStrategy.extract(this.currentUrlTree),\n      urlAfterRedirects: this.urlHandlingStrategy.extract(this.currentUrlTree),\n      rawUrl: this.currentUrlTree,\n      extras: {},\n      resolve: null,\n      reject: null,\n      promise: Promise.resolve(true),\n      source: 'imperative',\n      restoredState: null,\n      currentSnapshot: this.routerState.snapshot,\n      targetSnapshot: null,\n      currentRouterState: this.routerState,\n      targetRouterState: null,\n      guards: {canActivateChecks: [], canDeactivateChecks: []},\n      guardsResult: null,\n    });\n    this.navigations = this.setupNavigations(this.transitions);\n\n    this.processNavigations();\n  }\n\n  private setupNavigations(transitions: Observable<NavigationTransition>):\n      Observable<NavigationTransition> {\n    const eventsSubject = (this.events as Subject<Event>);\n    return transitions.pipe(\n               filter(t => t.id !== 0),\n\n               // Extract URL\n               map(t =>\n                       ({...t, extractedUrl: this.urlHandlingStrategy.extract(t.rawUrl)} as\n                        NavigationTransition)),\n\n               // Using switchMap so we cancel executing navigations when a new one comes in\n               switchMap(t => {\n                 let completed = false;\n                 let errored = false;\n                 return of(t).pipe(\n                     // Store the Navigation object\n                     tap(t => {\n                       this.currentNavigation = {\n                         id: t.id,\n                         initialUrl: t.currentRawUrl,\n                         extractedUrl: t.extractedUrl,\n                         trigger: t.source,\n                         extras: t.extras,\n                         previousNavigation: this.lastSuccessfulNavigation ?\n                             {...this.lastSuccessfulNavigation, previousNavigation: null} :\n                             null\n                       };\n                     }),\n                     switchMap(t => {\n                       const urlTransition = !this.navigated ||\n                           t.extractedUrl.toString() !== this.browserUrlTree.toString();\n                       const processCurrentUrl =\n                           (this.onSameUrlNavigation === 'reload' ? true : urlTransition) &&\n                           this.urlHandlingStrategy.shouldProcessUrl(t.rawUrl);\n\n                       if (processCurrentUrl) {\n                         return of(t).pipe(\n                             // Fire NavigationStart event\n                             switchMap(t => {\n                               const transition = this.transitions.getValue();\n                               eventsSubject.next(new NavigationStart(\n                                   t.id, this.serializeUrl(t.extractedUrl), t.source,\n                                   t.restoredState));\n                               if (transition !== this.transitions.getValue()) {\n                                 return EMPTY;\n                               }\n                               return [t];\n                             }),\n\n                             // This delay is required to match old behavior that forced navigation\n                             // to always be async\n                             switchMap(t => Promise.resolve(t)),\n\n                             // ApplyRedirects\n                             applyRedirects(\n                                 this.ngModule.injector, this.configLoader, this.urlSerializer,\n                                 this.config),\n\n                             // Update the currentNavigation\n                             tap(t => {\n                               this.currentNavigation = {\n                                 ...this.currentNavigation!,\n                                 finalUrl: t.urlAfterRedirects\n                               };\n                             }),\n\n                             // Recognize\n                             recognize(\n                                 this.rootComponentType, this.config,\n                                 (url) => this.serializeUrl(url), this.paramsInheritanceStrategy,\n                                 this.relativeLinkResolution),\n\n                             // Update URL if in `eager` update mode\n                             tap(t => {\n                               if (this.urlUpdateStrategy === 'eager') {\n                                 if (!t.extras.skipLocationChange) {\n                                   this.setBrowserUrl(\n                                       t.urlAfterRedirects, !!t.extras.replaceUrl, t.id,\n                                       t.extras.state);\n                                 }\n                                 this.browserUrlTree = t.urlAfterRedirects;\n                               }\n                             }),\n\n                             // Fire RoutesRecognized\n                             tap(t => {\n                               const routesRecognized = new RoutesRecognized(\n                                   t.id, this.serializeUrl(t.extractedUrl),\n                                   this.serializeUrl(t.urlAfterRedirects), t.targetSnapshot!);\n                               eventsSubject.next(routesRecognized);\n                             }));\n                       } else {\n                         const processPreviousUrl = urlTransition && this.rawUrlTree &&\n                             this.urlHandlingStrategy.shouldProcessUrl(this.rawUrlTree);\n                         /* When the current URL shouldn't be processed, but the previous one was,\n                          * we handle this \"error condition\" by navigating to the previously\n                          * successful URL, but leaving the URL intact.*/\n                         if (processPreviousUrl) {\n                           const {id, extractedUrl, source, restoredState, extras} = t;\n                           const navStart = new NavigationStart(\n                               id, this.serializeUrl(extractedUrl), source, restoredState);\n                           eventsSubject.next(navStart);\n                           const targetSnapshot =\n                               createEmptyState(extractedUrl, this.rootComponentType).snapshot;\n\n                           return of({\n                             ...t,\n                             targetSnapshot,\n                             urlAfterRedirects: extractedUrl,\n                             extras: {...extras, skipLocationChange: false, replaceUrl: false},\n                           });\n                         } else {\n                           /* When neither the current or previous URL can be processed, do nothing\n                            * other than update router's internal reference to the current \"settled\"\n                            * URL. This way the next navigation will be coming from the current URL\n                            * in the browser.\n                            */\n                           this.rawUrlTree = t.rawUrl;\n                           this.browserUrlTree = t.urlAfterRedirects;\n                           t.resolve(null);\n                           return EMPTY;\n                         }\n                       }\n                     }),\n\n                     // Before Preactivation\n                     switchTap(t => {\n                       const {\n                         targetSnapshot,\n                         id: navigationId,\n                         extractedUrl: appliedUrlTree,\n                         rawUrl: rawUrlTree,\n                         extras: {skipLocationChange, replaceUrl}\n                       } = t;\n                       return this.hooks.beforePreactivation(targetSnapshot!, {\n                         navigationId,\n                         appliedUrlTree,\n                         rawUrlTree,\n                         skipLocationChange: !!skipLocationChange,\n                         replaceUrl: !!replaceUrl,\n                       });\n                     }),\n\n                     // --- GUARDS ---\n                     tap(t => {\n                       const guardsStart = new GuardsCheckStart(\n                           t.id, this.serializeUrl(t.extractedUrl),\n                           this.serializeUrl(t.urlAfterRedirects), t.targetSnapshot!);\n                       this.triggerEvent(guardsStart);\n                     }),\n\n                     map(t => ({\n                           ...t,\n                           guards: getAllRouteGuards(\n                               t.targetSnapshot!, t.currentSnapshot, this.rootContexts)\n                         })),\n\n                     checkGuards(this.ngModule.injector, (evt: Event) => this.triggerEvent(evt)),\n                     tap(t => {\n                       if (isUrlTree(t.guardsResult)) {\n                         const error: Error&{url?: UrlTree} = navigationCancelingError(\n                             `Redirecting to \"${this.serializeUrl(t.guardsResult)}\"`);\n                         error.url = t.guardsResult;\n                         throw error;\n                       }\n                     }),\n\n                     tap(t => {\n                       const guardsEnd = new GuardsCheckEnd(\n                           t.id, this.serializeUrl(t.extractedUrl),\n                           this.serializeUrl(t.urlAfterRedirects), t.targetSnapshot!,\n                           !!t.guardsResult);\n                       this.triggerEvent(guardsEnd);\n                     }),\n\n                     filter(t => {\n                       if (!t.guardsResult) {\n                         this.resetUrlToCurrentUrlTree();\n                         const navCancel =\n                             new NavigationCancel(t.id, this.serializeUrl(t.extractedUrl), '');\n                         eventsSubject.next(navCancel);\n                         t.resolve(false);\n                         return false;\n                       }\n                       return true;\n                     }),\n\n                     // --- RESOLVE ---\n                     switchTap(t => {\n                       if (t.guards.canActivateChecks.length) {\n                         return of(t).pipe(\n                             tap(t => {\n                               const resolveStart = new ResolveStart(\n                                   t.id, this.serializeUrl(t.extractedUrl),\n                                   this.serializeUrl(t.urlAfterRedirects), t.targetSnapshot!);\n                               this.triggerEvent(resolveStart);\n                             }),\n                             switchMap(t => {\n                               let dataResolved = false;\n                               return of(t).pipe(\n                                   resolveData(\n                                       this.paramsInheritanceStrategy, this.ngModule.injector),\n                                   tap({\n                                     next: () => dataResolved = true,\n                                     complete: () => {\n                                       if (!dataResolved) {\n                                         const navCancel = new NavigationCancel(\n                                             t.id, this.serializeUrl(t.extractedUrl),\n                                             `At least one route resolver didn't emit any value.`);\n                                         eventsSubject.next(navCancel);\n                                         t.resolve(false);\n                                       }\n                                     }\n                                   }),\n                               );\n                             }),\n                             tap(t => {\n                               const resolveEnd = new ResolveEnd(\n                                   t.id, this.serializeUrl(t.extractedUrl),\n                                   this.serializeUrl(t.urlAfterRedirects), t.targetSnapshot!);\n                               this.triggerEvent(resolveEnd);\n                             }));\n                       }\n                       return undefined;\n                     }),\n\n                     // --- AFTER PREACTIVATION ---\n                     switchTap((t: NavigationTransition) => {\n                       const {\n                         targetSnapshot,\n                         id: navigationId,\n                         extractedUrl: appliedUrlTree,\n                         rawUrl: rawUrlTree,\n                         extras: {skipLocationChange, replaceUrl}\n                       } = t;\n                       return this.hooks.afterPreactivation(targetSnapshot!, {\n                         navigationId,\n                         appliedUrlTree,\n                         rawUrlTree,\n                         skipLocationChange: !!skipLocationChange,\n                         replaceUrl: !!replaceUrl,\n                       });\n                     }),\n\n                     map((t: NavigationTransition) => {\n                       const targetRouterState = createRouterState(\n                           this.routeReuseStrategy, t.targetSnapshot!, t.currentRouterState);\n                       return ({...t, targetRouterState});\n                     }),\n\n                     /* Once here, we are about to activate syncronously. The assumption is this\n                        will succeed, and user code may read from the Router service. Therefore\n                        before activation, we need to update router properties storing the current\n                        URL and the RouterState, as well as updated the browser URL. All this should\n                        happen *before* activating. */\n                     tap((t: NavigationTransition) => {\n                       this.currentUrlTree = t.urlAfterRedirects;\n                       this.rawUrlTree =\n                           this.urlHandlingStrategy.merge(this.currentUrlTree, t.rawUrl);\n\n                       (this as {routerState: RouterState}).routerState = t.targetRouterState!;\n\n                       if (this.urlUpdateStrategy === 'deferred') {\n                         if (!t.extras.skipLocationChange) {\n                           this.setBrowserUrl(\n                               this.rawUrlTree, !!t.extras.replaceUrl, t.id, t.extras.state);\n                         }\n                         this.browserUrlTree = t.urlAfterRedirects;\n                       }\n                     }),\n\n                     activateRoutes(\n                         this.rootContexts, this.routeReuseStrategy,\n                         (evt: Event) => this.triggerEvent(evt)),\n\n                     tap({\n                       next() {\n                         completed = true;\n                       },\n                       complete() {\n                         completed = true;\n                       }\n                     }),\n                     finalize(() => {\n                       /* When the navigation stream finishes either through error or success, we\n                        * set the `completed` or `errored` flag. However, there are some situations\n                        * where we could get here without either of those being set. For instance, a\n                        * redirect during NavigationStart. Therefore, this is a catch-all to make\n                        * sure the NavigationCancel\n                        * event is fired when a navigation gets cancelled but not caught by other\n                        * means. */\n                       if (!completed && !errored) {\n                         // Must reset to current URL tree here to ensure history.state is set. On a\n                         // fresh page load, if a new navigation comes in before a successful\n                         // navigation completes, there will be nothing in\n                         // history.state.navigationId. This can cause sync problems with AngularJS\n                         // sync code which looks for a value here in order to determine whether or\n                         // not to handle a given popstate event or to leave it to the Angualr\n                         // router.\n                         this.resetUrlToCurrentUrlTree();\n                         const navCancel = new NavigationCancel(\n                             t.id, this.serializeUrl(t.extractedUrl),\n                             `Navigation ID ${t.id} is not equal to the current navigation id ${\n                                 this.navigationId}`);\n                         eventsSubject.next(navCancel);\n                         t.resolve(false);\n                       }\n                       // currentNavigation should always be reset to null here. If navigation was\n                       // successful, lastSuccessfulTransition will have already been set. Therefore\n                       // we can safely set currentNavigation to null here.\n                       this.currentNavigation = null;\n                     }),\n                     catchError((e) => {\n                       errored = true;\n                       /* This error type is issued during Redirect, and is handled as a\n                        * cancellation rather than an error. */\n                       if (isNavigationCancelingError(e)) {\n                         const redirecting = isUrlTree(e.url);\n                         if (!redirecting) {\n                           // Set property only if we're not redirecting. If we landed on a page and\n                           // redirect to `/` route, the new navigation is going to see the `/`\n                           // isn't a change from the default currentUrlTree and won't navigate.\n                           // This is only applicable with initial navigation, so setting\n                           // `navigated` only when not redirecting resolves this scenario.\n                           this.navigated = true;\n                           this.resetStateAndUrl(t.currentRouterState, t.currentUrlTree, t.rawUrl);\n                         }\n                         const navCancel = new NavigationCancel(\n                             t.id, this.serializeUrl(t.extractedUrl), e.message);\n                         eventsSubject.next(navCancel);\n\n                         // When redirecting, we need to delay resolving the navigation\n                         // promise and push it to the redirect navigation\n                         if (!redirecting) {\n                           t.resolve(false);\n                         } else {\n                           // setTimeout is required so this navigation finishes with\n                           // the return EMPTY below. If it isn't allowed to finish\n                           // processing, there can be multiple navigations to the same\n                           // URL.\n                           setTimeout(() => {\n                             const mergedTree =\n                                 this.urlHandlingStrategy.merge(e.url, this.rawUrlTree);\n                             const extras = {\n                               skipLocationChange: t.extras.skipLocationChange,\n                               replaceUrl: this.urlUpdateStrategy === 'eager'\n                             };\n\n                             return this.scheduleNavigation(\n                                 mergedTree, 'imperative', null, extras,\n                                 {resolve: t.resolve, reject: t.reject, promise: t.promise});\n                           }, 0);\n                         }\n\n                         /* All other errors should reset to the router's internal URL reference to\n                          * the pre-error state. */\n                       } else {\n                         this.resetStateAndUrl(t.currentRouterState, t.currentUrlTree, t.rawUrl);\n                         const navError =\n                             new NavigationError(t.id, this.serializeUrl(t.extractedUrl), e);\n                         eventsSubject.next(navError);\n                         try {\n                           t.resolve(this.errorHandler(e));\n                         } catch (ee) {\n                           t.reject(ee);\n                         }\n                       }\n                       return EMPTY;\n                     }));\n                 // TODO(jasonaden): remove cast once g3 is on updated TypeScript\n               })) as any as Observable<NavigationTransition>;\n  }\n\n  /**\n   * @internal\n   * TODO: this should be removed once the constructor of the router made internal\n   */\n  resetRootComponentType(rootComponentType: Type<any>): void {\n    this.rootComponentType = rootComponentType;\n    // TODO: vsavkin router 4.0 should make the root component set to null\n    // this will simplify the lifecycle of the router.\n    this.routerState.root.component = this.rootComponentType;\n  }\n\n  private getTransition(): NavigationTransition {\n    const transition = this.transitions.value;\n    // This value needs to be set. Other values such as extractedUrl are set on initial navigation\n    // but the urlAfterRedirects may not get set if we aren't processing the new URL *and* not\n    // processing the previous URL.\n    transition.urlAfterRedirects = this.browserUrlTree;\n    return transition;\n  }\n\n  private setTransition(t: Partial<NavigationTransition>): void {\n    this.transitions.next({...this.getTransition(), ...t});\n  }\n\n  /**\n   * Sets up the location change listener and performs the initial navigation.\n   */\n  initialNavigation(): void {\n    this.setUpLocationChangeListener();\n    if (this.navigationId === 0) {\n      this.navigateByUrl(this.location.path(true), {replaceUrl: true});\n    }\n  }\n\n  /**\n   * Sets up the location change listener. This listener detects navigations triggered from outside\n   * the Router (the browser back/forward buttons, for example) and schedules a corresponding Router\n   * navigation so that the correct events, guards, etc. are triggered.\n   */\n  setUpLocationChangeListener(): void {\n    // Don't need to use Zone.wrap any more, because zone.js\n    // already patch onPopState, so location change callback will\n    // run into ngZone\n    if (!this.locationSubscription) {\n      this.locationSubscription = this.location.subscribe(event => {\n        const currentChange = this.extractLocationChangeInfoFromEvent(event);\n        if (this.shouldScheduleNavigation(this.lastLocationChangeInfo, currentChange)) {\n          // The `setTimeout` was added in #12160 and is likely to support Angular/AngularJS\n          // hybrid apps.\n          setTimeout(() => {\n            const {source, state, urlTree} = currentChange;\n            const extras: NavigationExtras = {replaceUrl: true};\n            if (state) {\n              const stateCopy = {...state} as Partial<RestoredState>;\n              delete stateCopy.navigationId;\n              if (Object.keys(stateCopy).length !== 0) {\n                extras.state = stateCopy;\n              }\n            }\n            this.scheduleNavigation(urlTree, source, state, extras);\n          }, 0);\n        }\n        this.lastLocationChangeInfo = currentChange;\n      });\n    }\n  }\n\n  /** Extracts router-related information from a `PopStateEvent`. */\n  private extractLocationChangeInfoFromEvent(change: PopStateEvent): LocationChangeInfo {\n    return {\n      source: change['type'] === 'popstate' ? 'popstate' : 'hashchange',\n      urlTree: this.parseUrl(change['url']!),\n      // Navigations coming from Angular router have a navigationId state\n      // property. When this exists, restore the state.\n      state: change.state?.navigationId ? change.state : null,\n      transitionId: this.getTransition().id\n    } as const;\n  }\n\n  /**\n   * Determines whether two events triggered by the Location subscription are due to the same\n   * navigation. The location subscription can fire two events (popstate and hashchange) for a\n   * single navigation. The second one should be ignored, that is, we should not schedule another\n   * navigation in the Router.\n   */\n  private shouldScheduleNavigation(previous: LocationChangeInfo|null, current: LocationChangeInfo):\n      boolean {\n    if (!previous) return true;\n\n    const sameDestination = current.urlTree.toString() === previous.urlTree.toString();\n    const eventsOccurredAtSameTime = current.transitionId === previous.transitionId;\n    if (!eventsOccurredAtSameTime || !sameDestination) {\n      return true;\n    }\n\n    if ((current.source === 'hashchange' && previous.source === 'popstate') ||\n        (current.source === 'popstate' && previous.source === 'hashchange')) {\n      return false;\n    }\n\n    return true;\n  }\n\n  /** The current URL. */\n  get url(): string {\n    return this.serializeUrl(this.currentUrlTree);\n  }\n\n  /** The current Navigation object if one exists */\n  getCurrentNavigation(): Navigation|null {\n    return this.currentNavigation;\n  }\n\n  /** @internal */\n  triggerEvent(event: Event): void {\n    (this.events as Subject<Event>).next(event);\n  }\n\n  /**\n   * Resets the route configuration used for navigation and generating links.\n   *\n   * @param config The route array for the new configuration.\n   *\n   * @usageNotes\n   *\n   * ```\n   * router.resetConfig([\n   *  { path: 'team/:id', component: TeamCmp, children: [\n   *    { path: 'simple', component: SimpleCmp },\n   *    { path: 'user/:name', component: UserCmp }\n   *  ]}\n   * ]);\n   * ```\n   */\n  resetConfig(config: Routes): void {\n    validateConfig(config);\n    this.config = config.map(standardizeConfig);\n    this.navigated = false;\n    this.lastSuccessfulId = -1;\n  }\n\n  /** @nodoc */\n  ngOnDestroy(): void {\n    this.dispose();\n  }\n\n  /** Disposes of the router. */\n  dispose(): void {\n    if (this.locationSubscription) {\n      this.locationSubscription.unsubscribe();\n      this.locationSubscription = undefined;\n    }\n  }\n\n  /**\n   * Appends URL segments to the current URL tree to create a new URL tree.\n   *\n   * @param commands An array of URL fragments with which to construct the new URL tree.\n   * If the path is static, can be the literal URL string. For a dynamic path, pass an array of path\n   * segments, followed by the parameters for each segment.\n   * The fragments are applied to the current URL tree or the one provided  in the `relativeTo`\n   * property of the options object, if supplied.\n   * @param navigationExtras Options that control the navigation strategy. This function\n   * only uses properties in `NavigationExtras` that would change the provided URL.\n   * @returns The new URL tree.\n   *\n   * @usageNotes\n   *\n   * ```\n   * // create /team/33/user/11\n   * router.createUrlTree(['/team', 33, 'user', 11]);\n   *\n   * // create /team/33;expand=true/user/11\n   * router.createUrlTree(['/team', 33, {expand: true}, 'user', 11]);\n   *\n   * // you can collapse static segments like this (this works only with the first passed-in value):\n   * router.createUrlTree(['/team/33/user', userId]);\n   *\n   * // If the first segment can contain slashes, and you do not want the router to split it,\n   * // you can do the following:\n   * router.createUrlTree([{segmentPath: '/one/two'}]);\n   *\n   * // create /team/33/(user/11//right:chat)\n   * router.createUrlTree(['/team', 33, {outlets: {primary: 'user/11', right: 'chat'}}]);\n   *\n   * // remove the right secondary node\n   * router.createUrlTree(['/team', 33, {outlets: {primary: 'user/11', right: null}}]);\n   *\n   * // assuming the current url is `/team/33/user/11` and the route points to `user/11`\n   *\n   * // navigate to /team/33/user/11/details\n   * router.createUrlTree(['details'], {relativeTo: route});\n   *\n   * // navigate to /team/33/user/22\n   * router.createUrlTree(['../22'], {relativeTo: route});\n   *\n   * // navigate to /team/44/user/22\n   * router.createUrlTree(['../../team/44/user/22'], {relativeTo: route});\n   * ```\n   */\n  createUrlTree(commands: any[], navigationExtras: NavigationExtras = {}): UrlTree {\n    const {\n      relativeTo,\n      queryParams,\n      fragment,\n      preserveQueryParams,\n      queryParamsHandling,\n      preserveFragment\n    } = navigationExtras;\n    if (isDevMode() && preserveQueryParams && <any>console && <any>console.warn) {\n      console.warn('preserveQueryParams is deprecated, use queryParamsHandling instead.');\n    }\n    const a = relativeTo || this.routerState.root;\n    const f = preserveFragment ? this.currentUrlTree.fragment : fragment;\n    let q: Params|null = null;\n    if (queryParamsHandling) {\n      switch (queryParamsHandling) {\n        case 'merge':\n          q = {...this.currentUrlTree.queryParams, ...queryParams};\n          break;\n        case 'preserve':\n          q = this.currentUrlTree.queryParams;\n          break;\n        default:\n          q = queryParams || null;\n      }\n    } else {\n      q = preserveQueryParams ? this.currentUrlTree.queryParams : queryParams || null;\n    }\n    if (q !== null) {\n      q = this.removeEmptyProps(q);\n    }\n    return createUrlTree(a, this.currentUrlTree, commands, q!, f!);\n  }\n\n  /**\n   * Navigates to a view using an absolute route path.\n   *\n   * @param url An absolute path for a defined route. The function does not apply any delta to the\n   *     current URL.\n   * @param extras An object containing properties that modify the navigation strategy.\n   * The function ignores any properties in the `NavigationExtras` that would change the\n   * provided URL.\n   *\n   * @returns A Promise that resolves to 'true' when navigation succeeds,\n   * to 'false' when navigation fails, or is rejected on error.\n   *\n   * @usageNotes\n   *\n   * The following calls request navigation to an absolute path.\n   *\n   * ```\n   * router.navigateByUrl(\"/team/33/user/11\");\n   *\n   * // Navigate without updating the URL\n   * router.navigateByUrl(\"/team/33/user/11\", { skipLocationChange: true });\n   * ```\n   *\n   * @see [Routing and Navigation guide](guide/router)\n   *\n   */\n  navigateByUrl(url: string|UrlTree, extras: NavigationExtras = {skipLocationChange: false}):\n      Promise<boolean> {\n    if (isDevMode() && this.isNgZoneEnabled && !NgZone.isInAngularZone()) {\n      this.console.warn(\n          `Navigation triggered outside Angular zone, did you forget to call 'ngZone.run()'?`);\n    }\n\n    const urlTree = isUrlTree(url) ? url : this.parseUrl(url);\n    const mergedTree = this.urlHandlingStrategy.merge(urlTree, this.rawUrlTree);\n\n    return this.scheduleNavigation(mergedTree, 'imperative', null, extras);\n  }\n\n  /**\n   * Navigate based on the provided array of commands and a starting point.\n   * If no starting route is provided, the navigation is absolute.\n   *\n   * @param commands An array of URL fragments with which to construct the target URL.\n   * If the path is static, can be the literal URL string. For a dynamic path, pass an array of path\n   * segments, followed by the parameters for each segment.\n   * The fragments are applied to the current URL or the one provided  in the `relativeTo` property\n   * of the options object, if supplied.\n   * @param extras An options object that determines how the URL should be constructed or\n   *     interpreted.\n   *\n   * @returns A Promise that resolves to `true` when navigation succeeds, to `false` when navigation\n   *     fails,\n   * or is rejected on error.\n   *\n   * @usageNotes\n   *\n   * The following calls request navigation to a dynamic route path relative to the current URL.\n   *\n   * ```\n   * router.navigate(['team', 33, 'user', 11], {relativeTo: route});\n   *\n   * // Navigate without updating the URL, overriding the default behavior\n   * router.navigate(['team', 33, 'user', 11], {relativeTo: route, skipLocationChange: true});\n   * ```\n   *\n   * @see [Routing and Navigation guide](guide/router)\n   *\n   */\n  navigate(commands: any[], extras: NavigationExtras = {skipLocationChange: false}):\n      Promise<boolean> {\n    validateCommands(commands);\n    return this.navigateByUrl(this.createUrlTree(commands, extras), extras);\n  }\n\n  /** Serializes a `UrlTree` into a string */\n  serializeUrl(url: UrlTree): string {\n    return this.urlSerializer.serialize(url);\n  }\n\n  /** Parses a string into a `UrlTree` */\n  parseUrl(url: string): UrlTree {\n    let urlTree: UrlTree;\n    try {\n      urlTree = this.urlSerializer.parse(url);\n    } catch (e) {\n      urlTree = this.malformedUriErrorHandler(e, this.urlSerializer, url);\n    }\n    return urlTree;\n  }\n\n  /** Returns whether the url is activated */\n  isActive(url: string|UrlTree, exact: boolean): boolean {\n    if (isUrlTree(url)) {\n      return containsTree(this.currentUrlTree, url, exact);\n    }\n\n    const urlTree = this.parseUrl(url);\n    return containsTree(this.currentUrlTree, urlTree, exact);\n  }\n\n  private removeEmptyProps(params: Params): Params {\n    return Object.keys(params).reduce((result: Params, key: string) => {\n      const value: any = params[key];\n      if (value !== null && value !== undefined) {\n        result[key] = value;\n      }\n      return result;\n    }, {});\n  }\n\n  private processNavigations(): void {\n    this.navigations.subscribe(\n        t => {\n          this.navigated = true;\n          this.lastSuccessfulId = t.id;\n          (this.events as Subject<Event>)\n              .next(new NavigationEnd(\n                  t.id, this.serializeUrl(t.extractedUrl), this.serializeUrl(this.currentUrlTree)));\n          this.lastSuccessfulNavigation = this.currentNavigation;\n          this.currentNavigation = null;\n          t.resolve(true);\n        },\n        e => {\n          this.console.warn(`Unhandled Navigation Error: `);\n        });\n  }\n\n  private scheduleNavigation(\n      rawUrl: UrlTree, source: NavigationTrigger, restoredState: RestoredState|null,\n      extras: NavigationExtras,\n      priorPromise?: {resolve: any, reject: any, promise: Promise<boolean>}): Promise<boolean> {\n    // * Imperative navigations (router.navigate) might trigger additional navigations to the same\n    //   URL via a popstate event and the locationChangeListener. We should skip these duplicate\n    //   navs. Duplicates may also be triggered by attempts to sync AngularJS and Angular router\n    //   states.\n    // * Imperative navigations can be cancelled by router guards, meaning the URL won't change. If\n    //   the user follows that with a navigation using the back/forward button or manual URL change,\n    //   the destination may be the same as the previous imperative attempt. We should not skip\n    //   these navigations because it's a separate case from the one above -- it's not a duplicate\n    //   navigation.\n    const lastNavigation = this.getTransition();\n    // We don't want to skip duplicate successful navs if they're imperative because\n    // onSameUrlNavigation could be 'reload' (so the duplicate is intended).\n    const browserNavPrecededByRouterNav =\n        source !== 'imperative' && lastNavigation?.source === 'imperative';\n    const lastNavigationSucceeded = this.lastSuccessfulId === lastNavigation.id;\n    // If the last navigation succeeded or is in flight, we can use the rawUrl as the comparison.\n    // However, if it failed, we should compare to the final result (urlAfterRedirects).\n    const lastNavigationUrl = (lastNavigationSucceeded || this.currentNavigation) ?\n        lastNavigation.rawUrl :\n        lastNavigation.urlAfterRedirects;\n    const duplicateNav = lastNavigationUrl.toString() === rawUrl.toString();\n    if (browserNavPrecededByRouterNav && duplicateNav) {\n      return Promise.resolve(true);  // return value is not used\n    }\n\n    let resolve: any;\n    let reject: any;\n    let promise: Promise<boolean>;\n    if (priorPromise) {\n      resolve = priorPromise.resolve;\n      reject = priorPromise.reject;\n      promise = priorPromise.promise;\n\n    } else {\n      promise = new Promise<boolean>((res, rej) => {\n        resolve = res;\n        reject = rej;\n      });\n    }\n\n    const id = ++this.navigationId;\n    this.setTransition({\n      id,\n      source,\n      restoredState,\n      currentUrlTree: this.currentUrlTree,\n      currentRawUrl: this.rawUrlTree,\n      rawUrl,\n      extras,\n      resolve,\n      reject,\n      promise,\n      currentSnapshot: this.routerState.snapshot,\n      currentRouterState: this.routerState\n    });\n\n    // Make sure that the error is propagated even though `processNavigations` catch\n    // handler does not rethrow\n    return promise.catch((e: any) => {\n      return Promise.reject(e);\n    });\n  }\n\n  private setBrowserUrl(\n      url: UrlTree, replaceUrl: boolean, id: number, state?: {[key: string]: any}) {\n    const path = this.urlSerializer.serialize(url);\n    state = state || {};\n    if (this.location.isCurrentPathEqualTo(path) || replaceUrl) {\n      // TODO(jasonaden): Remove first `navigationId` and rely on `ng` namespace.\n      this.location.replaceState(path, '', {...state, navigationId: id});\n    } else {\n      this.location.go(path, '', {...state, navigationId: id});\n    }\n  }\n\n  private resetStateAndUrl(storedState: RouterState, storedUrl: UrlTree, rawUrl: UrlTree): void {\n    (this as {routerState: RouterState}).routerState = storedState;\n    this.currentUrlTree = storedUrl;\n    this.rawUrlTree = this.urlHandlingStrategy.merge(this.currentUrlTree, rawUrl);\n    this.resetUrlToCurrentUrlTree();\n  }\n\n  private resetUrlToCurrentUrlTree(): void {\n    this.location.replaceState(\n        this.urlSerializer.serialize(this.rawUrlTree), '', {navigationId: this.lastSuccessfulId});\n  }\n}\n\nfunction validateCommands(commands: string[]): void {\n  for (let i = 0; i < commands.length; i++) {\n    const cmd = commands[i];\n    if (cmd == null) {\n      throw new Error(`The requested path contains ${cmd} segment at index ${i}`);\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {LocationStrategy} from '@angular/common';\nimport {Attribute, Directive, ElementRef, HostBinding, HostListener, Input, isDevMode, OnChanges, OnDestroy, Renderer2, SimpleChanges} from '@angular/core';\nimport {Subject, Subscription} from 'rxjs';\n\nimport {QueryParamsHandling} from '../config';\nimport {Event, NavigationEnd} from '../events';\nimport {Router} from '../router';\nimport {ActivatedRoute} from '../router_state';\nimport {UrlTree} from '../url_tree';\n\n\n/**\n * @description\n *\n * When applied to an element in a template, makes that element a link\n * that initiates navigation to a route. Navigation opens one or more routed components\n * in one or more `<router-outlet>` locations on the page.\n *\n * Given a route configuration `[{ path: 'user/:name', component: UserCmp }]`,\n * the following creates a static link to the route:\n * `<a routerLink=\"/user/bob\">link to user component</a>`\n *\n * You can use dynamic values to generate the link.\n * For a dynamic link, pass an array of path segments,\n * followed by the params for each segment.\n * For example, `['/team', teamId, 'user', userName, {details: true}]`\n * generates a link to `/team/11/user/bob;details=true`.\n *\n * Multiple static segments can be merged into one term and combined with dynamic segements.\n * For example, `['/team/11/user', userName, {details: true}]`\n *\n * The input that you provide to the link is treated as a delta to the current URL.\n * For instance, suppose the current URL is `/user/(box//aux:team)`.\n * The link `<a [routerLink]=\"['/user/jim']\">Jim</a>` creates the URL\n * `/user/(jim//aux:team)`.\n * See {@link Router#createUrlTree createUrlTree} for more information.\n *\n * @usageNotes\n *\n * You can use absolute or relative paths in a link, set query parameters,\n * control how parameters are handled, and keep a history of navigation states.\n *\n * ### Relative link paths\n *\n * The first segment name can be prepended with `/`, `./`, or `../`.\n * * If the first segment begins with `/`, the router looks up the route from the root of the\n *   app.\n * * If the first segment begins with `./`, or doesn't begin with a slash, the router\n *   looks in the children of the current activated route.\n * * If the first segment begins with `../`, the router goes up one level in the route tree.\n *\n * ### Setting and handling query params and fragments\n *\n * The following link adds a query parameter and a fragment to the generated URL:\n *\n * ```\n * <a [routerLink]=\"['/user/bob']\" [queryParams]=\"{debug: true}\" fragment=\"education\">\n *   link to user component\n * </a>\n * ```\n * By default, the directive constructs the new URL using the given query parameters.\n * The example generates the link: `/user/bob?debug=true#education`.\n *\n * You can instruct the directive to handle query parameters differently\n * by specifying the `queryParamsHandling` option in the link.\n * Allowed values are:\n *\n *  - `'merge'`: Merge the given `queryParams` into the current query params.\n *  - `'preserve'`: Preserve the current query params.\n *\n * For example:\n *\n * ```\n * <a [routerLink]=\"['/user/bob']\" [queryParams]=\"{debug: true}\" queryParamsHandling=\"merge\">\n *   link to user component\n * </a>\n * ```\n *\n * See {@link NavigationExtras.queryParamsHandling NavigationExtras#queryParamsHandling}.\n *\n * ### Preserving navigation history\n *\n * You can provide a `state` value to be persisted to the browser's\n * [`History.state` property](https://developer.mozilla.org/en-US/docs/Web/API/History#Properties).\n * For example:\n *\n * ```\n * <a [routerLink]=\"['/user/bob']\" [state]=\"{tracingId: 123}\">\n *   link to user component\n * </a>\n * ```\n *\n * Use {@link Router.getCurrentNavigation() Router#getCurrentNavigation} to retrieve a saved\n * navigation-state value. For example, to capture the `tracingId` during the `NavigationStart`\n * event:\n *\n * ```\n * // Get NavigationStart events\n * router.events.pipe(filter(e => e instanceof NavigationStart)).subscribe(e => {\n *   const navigation = router.getCurrentNavigation();\n *   tracingService.trace({id: navigation.extras.state.tracingId});\n * });\n * ```\n *\n * @ngModule RouterModule\n *\n * @publicApi\n */\n@Directive({selector: ':not(a):not(area)[routerLink]'})\nexport class RouterLink implements OnChanges {\n  /**\n   * Passed to {@link Router#createUrlTree Router#createUrlTree} as part of the `NavigationExtras`.\n   * @see {@link NavigationExtras#queryParams NavigationExtras#queryParams}\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input() queryParams!: {[k: string]: any};\n  /**\n   * Passed to {@link Router#createUrlTree Router#createUrlTree} as part of the `NavigationExtras`.\n   * @see {@link NavigationExtras#fragment NavigationExtras#fragment}\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input() fragment!: string;\n  /**\n   * Passed to {@link Router#createUrlTree Router#createUrlTree} as part of the `NavigationExtras`.\n   * @see {@link NavigationExtras#queryParamsHandling NavigationExtras#queryParamsHandling}\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input() queryParamsHandling!: QueryParamsHandling;\n  /**\n   * Passed to {@link Router#createUrlTree Router#createUrlTree} as part of the `NavigationExtras`.\n   * @see {@link NavigationExtras#preserveFragment NavigationExtras#preserveFragment}\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input() preserveFragment!: boolean;\n  /**\n   * Passed to {@link Router#createUrlTree Router#createUrlTree} as part of the `NavigationExtras`.\n   * @see {@link NavigationExtras#skipLocationChange NavigationExtras#skipLocationChange}\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input() skipLocationChange!: boolean;\n  /**\n   * Passed to {@link Router#createUrlTree Router#createUrlTree} as part of the `NavigationExtras`.\n   * @see {@link NavigationExtras#replaceUrl NavigationExtras#replaceUrl}\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input() replaceUrl!: boolean;\n  /**\n   * Passed to {@link Router#createUrlTree Router#createUrlTree} as part of the `NavigationExtras`.\n   * @see {@link NavigationExtras#state NavigationExtras#state}\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  @Input() state?: {[k: string]: any};\n  private commands: any[] = [];\n  private preserve!: boolean;\n\n  /** @internal */\n  onChanges = new Subject<RouterLink>();\n\n  constructor(\n      private router: Router, private route: ActivatedRoute,\n      @Attribute('tabindex') tabIndex: string, renderer: Renderer2, el: ElementRef) {\n    if (tabIndex == null) {\n      renderer.setAttribute(el.nativeElement, 'tabindex', '0');\n    }\n  }\n\n  /** @nodoc */\n  ngOnChanges(changes: SimpleChanges) {\n    // This is subscribed to by `RouterLinkActive` so that it knows to update when there are changes\n    // to the RouterLinks it's tracking.\n    this.onChanges.next(this);\n  }\n\n  /**\n   * Commands to pass to {@link Router#createUrlTree Router#createUrlTree}.\n   *   - **array**: commands to pass to {@link Router#createUrlTree Router#createUrlTree}.\n   *   - **string**: shorthand for array of commands with just the string, i.e. `['/route']`\n   *   - **null|undefined**: shorthand for an empty array of commands, i.e. `[]`\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  @Input()\n  set routerLink(commands: any[]|string|null|undefined) {\n    if (commands != null) {\n      this.commands = Array.isArray(commands) ? commands : [commands];\n    } else {\n      this.commands = [];\n    }\n  }\n\n  /**\n   * @deprecated As of Angular v4.0 use `queryParamsHandling` instead.\n   */\n  @Input()\n  set preserveQueryParams(value: boolean) {\n    if (isDevMode() && <any>console && <any>console.warn) {\n      console.warn('preserveQueryParams is deprecated!, use queryParamsHandling instead.');\n    }\n    this.preserve = value;\n  }\n\n  /** @nodoc */\n  @HostListener('click')\n  onClick(): boolean {\n    const extras = {\n      skipLocationChange: attrBoolValue(this.skipLocationChange),\n      replaceUrl: attrBoolValue(this.replaceUrl),\n      state: this.state,\n    };\n    this.router.navigateByUrl(this.urlTree, extras);\n    return true;\n  }\n\n  get urlTree(): UrlTree {\n    return this.router.createUrlTree(this.commands, {\n      relativeTo: this.route,\n      queryParams: this.queryParams,\n      fragment: this.fragment,\n      preserveQueryParams: attrBoolValue(this.preserve),\n      queryParamsHandling: this.queryParamsHandling,\n      preserveFragment: attrBoolValue(this.preserveFragment),\n    });\n  }\n}\n\n/**\n * @description\n *\n * Lets you link to specific routes in your app.\n *\n * See `RouterLink` for more information.\n *\n * @ngModule RouterModule\n *\n * @publicApi\n */\n@Directive({selector: 'a[routerLink],area[routerLink]'})\nexport class RouterLinkWithHref implements OnChanges, OnDestroy {\n  // TODO(issue/24571): remove '!'.\n  @HostBinding('attr.target') @Input() target!: string;\n  /**\n   * Passed to {@link Router#createUrlTree Router#createUrlTree} as part of the `NavigationExtras`.\n   * @see {@link NavigationExtras#queryParams NavigationExtras#queryParams}\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input() queryParams!: {[k: string]: any};\n  /**\n   * Passed to {@link Router#createUrlTree Router#createUrlTree} as part of the `NavigationExtras`.\n   * @see {@link NavigationExtras#fragment NavigationExtras#fragment}\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input() fragment!: string;\n  /**\n   * Passed to {@link Router#createUrlTree Router#createUrlTree} as part of the `NavigationExtras`.\n   * @see {@link NavigationExtras#queryParamsHandling NavigationExtras#queryParamsHandling}\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input() queryParamsHandling!: QueryParamsHandling;\n  /**\n   * Passed to {@link Router#createUrlTree Router#createUrlTree} as part of the `NavigationExtras`.\n   * @see {@link NavigationExtras#preserveFragment NavigationExtras#preserveFragment}\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input() preserveFragment!: boolean;\n  /**\n   * Passed to {@link Router#createUrlTree Router#createUrlTree} as part of the `NavigationExtras`.\n   * @see {@link NavigationExtras#skipLocationChange NavigationExtras#skipLocationChange}\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input() skipLocationChange!: boolean;\n  /**\n   * Passed to {@link Router#createUrlTree Router#createUrlTree} as part of the `NavigationExtras`.\n   * @see {@link NavigationExtras#replaceUrl NavigationExtras#replaceUrl}\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input() replaceUrl!: boolean;\n  /**\n   * Passed to {@link Router#createUrlTree Router#createUrlTree} as part of the `NavigationExtras`.\n   * @see {@link NavigationExtras#state NavigationExtras#state}\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  @Input() state?: {[k: string]: any};\n  private commands: any[] = [];\n  private subscription: Subscription;\n  // TODO(issue/24571): remove '!'.\n  private preserve!: boolean;\n\n  // the url displayed on the anchor element.\n  // TODO(issue/24571): remove '!'.\n  @HostBinding() href!: string;\n\n  /** @internal */\n  onChanges = new Subject<RouterLinkWithHref>();\n\n  constructor(\n      private router: Router, private route: ActivatedRoute,\n      private locationStrategy: LocationStrategy) {\n    this.subscription = router.events.subscribe((s: Event) => {\n      if (s instanceof NavigationEnd) {\n        this.updateTargetUrlAndHref();\n      }\n    });\n  }\n\n  /**\n   * Commands to pass to {@link Router#createUrlTree Router#createUrlTree}.\n   *   - **array**: commands to pass to {@link Router#createUrlTree Router#createUrlTree}.\n   *   - **string**: shorthand for array of commands with just the string, i.e. `['/route']`\n   *   - **null|undefined**: shorthand for an empty array of commands, i.e. `[]`\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  @Input()\n  set routerLink(commands: any[]|string|null|undefined) {\n    if (commands != null) {\n      this.commands = Array.isArray(commands) ? commands : [commands];\n    } else {\n      this.commands = [];\n    }\n  }\n\n  /**\n   * @deprecated As of Angular v4.0 use `queryParamsHandling` instead.\n   */\n  @Input()\n  set preserveQueryParams(value: boolean) {\n    if (isDevMode() && <any>console && <any>console.warn) {\n      console.warn('preserveQueryParams is deprecated, use queryParamsHandling instead.');\n    }\n    this.preserve = value;\n  }\n\n  /** @nodoc */\n  ngOnChanges(changes: SimpleChanges): any {\n    this.updateTargetUrlAndHref();\n    this.onChanges.next(this);\n  }\n  /** @nodoc */\n  ngOnDestroy(): any {\n    this.subscription.unsubscribe();\n  }\n\n  /** @nodoc */\n  @HostListener(\n      'click',\n      ['$event.button', '$event.ctrlKey', '$event.shiftKey', '$event.altKey', '$event.metaKey'])\n  onClick(button: number, ctrlKey: boolean, shiftKey: boolean, altKey: boolean, metaKey: boolean):\n      boolean {\n    if (button !== 0 || ctrlKey || shiftKey || altKey || metaKey) {\n      return true;\n    }\n\n    if (typeof this.target === 'string' && this.target != '_self') {\n      return true;\n    }\n\n    const extras = {\n      skipLocationChange: attrBoolValue(this.skipLocationChange),\n      replaceUrl: attrBoolValue(this.replaceUrl),\n      state: this.state\n    };\n    this.router.navigateByUrl(this.urlTree, extras);\n    return false;\n  }\n\n  private updateTargetUrlAndHref(): void {\n    this.href = this.locationStrategy.prepareExternalUrl(this.router.serializeUrl(this.urlTree));\n  }\n\n  get urlTree(): UrlTree {\n    return this.router.createUrlTree(this.commands, {\n      relativeTo: this.route,\n      queryParams: this.queryParams,\n      fragment: this.fragment,\n      preserveQueryParams: attrBoolValue(this.preserve),\n      queryParamsHandling: this.queryParamsHandling,\n      preserveFragment: attrBoolValue(this.preserveFragment),\n    });\n  }\n}\n\nfunction attrBoolValue(s: any): boolean {\n  return s === '' || !!s;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {AfterContentInit, ChangeDetectorRef, ContentChildren, Directive, ElementRef, Input, OnChanges, OnDestroy, Optional, QueryList, Renderer2, SimpleChanges} from '@angular/core';\nimport {from, of, Subscription} from 'rxjs';\nimport {mergeAll} from 'rxjs/operators';\n\nimport {Event, NavigationEnd} from '../events';\nimport {Router} from '../router';\n\nimport {RouterLink, RouterLinkWithHref} from './router_link';\n\n\n/**\n *\n * @description\n *\n * Tracks whether the linked route of an element is currently active, and allows you\n * to specify one or more CSS classes to add to the element when the linked route\n * is active.\n *\n * Use this directive to create a visual distinction for elements associated with an active route.\n * For example, the following code highlights the word \"Bob\" when the the router\n * activates the associated route:\n *\n * ```\n * <a routerLink=\"/user/bob\" routerLinkActive=\"active-link\">Bob</a>\n * ```\n *\n * Whenever the URL is either '/user' or '/user/bob', the \"active-link\" class is\n * added to the anchor tag. If the URL changes, the class is removed.\n *\n * You can set more than one class using a space-separated string or an array.\n * For example:\n *\n * ```\n * <a routerLink=\"/user/bob\" routerLinkActive=\"class1 class2\">Bob</a>\n * <a routerLink=\"/user/bob\" [routerLinkActive]=\"['class1', 'class2']\">Bob</a>\n * ```\n *\n * To add the classes only when the URL matches the link exactly, add the option `exact: true`:\n *\n * ```\n * <a routerLink=\"/user/bob\" routerLinkActive=\"active-link\" [routerLinkActiveOptions]=\"{exact:\n * true}\">Bob</a>\n * ```\n *\n * To directly check the `isActive` status of the link, assign the `RouterLinkActive`\n * instance to a template variable.\n * For example, the following checks the status without assigning any CSS classes:\n *\n * ```\n * <a routerLink=\"/user/bob\" routerLinkActive #rla=\"routerLinkActive\">\n *   Bob {{ rla.isActive ? '(already open)' : ''}}\n * </a>\n * ```\n *\n * You can apply the `RouterLinkActive` directive to an ancestor of linked elements.\n * For example, the following sets the active-link class on the `<div>`  parent tag\n * when the URL is either '/user/jim' or '/user/bob'.\n *\n * ```\n * <div routerLinkActive=\"active-link\" [routerLinkActiveOptions]=\"{exact: true}\">\n *   <a routerLink=\"/user/jim\">Jim</a>\n *   <a routerLink=\"/user/bob\">Bob</a>\n * </div>\n * ```\n *\n * @ngModule RouterModule\n *\n * @publicApi\n */\n@Directive({\n  selector: '[routerLinkActive]',\n  exportAs: 'routerLinkActive',\n})\nexport class RouterLinkActive implements OnChanges, OnDestroy, AfterContentInit {\n  @ContentChildren(RouterLink, {descendants: true}) links!: QueryList<RouterLink>;\n  @ContentChildren(RouterLinkWithHref, {descendants: true})\n  linksWithHrefs!: QueryList<RouterLinkWithHref>;\n\n  private classes: string[] = [];\n  private routerEventsSubscription: Subscription;\n  private linkInputChangesSubscription?: Subscription;\n  public readonly isActive: boolean = false;\n\n  @Input() routerLinkActiveOptions: {exact: boolean} = {exact: false};\n\n  constructor(\n      private router: Router, private element: ElementRef, private renderer: Renderer2,\n      private readonly cdr: ChangeDetectorRef, @Optional() private link?: RouterLink,\n      @Optional() private linkWithHref?: RouterLinkWithHref) {\n    this.routerEventsSubscription = router.events.subscribe((s: Event) => {\n      if (s instanceof NavigationEnd) {\n        this.update();\n      }\n    });\n  }\n\n  /** @nodoc */\n  ngAfterContentInit(): void {\n    // `of(null)` is used to force subscribe body to execute once immediately (like `startWith`).\n    from([this.links.changes, this.linksWithHrefs.changes, of(null)])\n        .pipe(mergeAll())\n        .subscribe(_ => {\n          this.update();\n          this.subscribeToEachLinkOnChanges();\n        });\n  }\n\n  private subscribeToEachLinkOnChanges() {\n    this.linkInputChangesSubscription?.unsubscribe();\n    const allLinkChanges =\n        [...this.links.toArray(), ...this.linksWithHrefs.toArray(), this.link, this.linkWithHref]\n            .filter((link): link is RouterLink|RouterLinkWithHref => !!link)\n            .map(link => link.onChanges);\n    this.linkInputChangesSubscription = from(allLinkChanges).pipe(mergeAll()).subscribe(link => {\n      if (this.isActive !== this.isLinkActive(this.router)(link)) {\n        this.update();\n      }\n    });\n  }\n\n  @Input()\n  set routerLinkActive(data: string[]|string) {\n    const classes = Array.isArray(data) ? data : data.split(' ');\n    this.classes = classes.filter(c => !!c);\n  }\n\n  /** @nodoc */\n  ngOnChanges(changes: SimpleChanges): void {\n    this.update();\n  }\n  /** @nodoc */\n  ngOnDestroy(): void {\n    this.routerEventsSubscription.unsubscribe();\n    this.linkInputChangesSubscription?.unsubscribe();\n  }\n\n  private update(): void {\n    if (!this.links || !this.linksWithHrefs || !this.router.navigated) return;\n    Promise.resolve().then(() => {\n      const hasActiveLinks = this.hasActiveLinks();\n      if (this.isActive !== hasActiveLinks) {\n        (this as any).isActive = hasActiveLinks;\n        this.cdr.markForCheck();\n        this.classes.forEach((c) => {\n          if (hasActiveLinks) {\n            this.renderer.addClass(this.element.nativeElement, c);\n          } else {\n            this.renderer.removeClass(this.element.nativeElement, c);\n          }\n        });\n      }\n    });\n  }\n\n  private isLinkActive(router: Router): (link: (RouterLink|RouterLinkWithHref)) => boolean {\n    return (link: RouterLink|RouterLinkWithHref) =>\n               router.isActive(link.urlTree, this.routerLinkActiveOptions.exact);\n  }\n\n  private hasActiveLinks(): boolean {\n    const isActiveCheckFn = this.isLinkActive(this.router);\n    return this.link && isActiveCheckFn(this.link) ||\n        this.linkWithHref && isActiveCheckFn(this.linkWithHref) ||\n        this.links.some(isActiveCheckFn) || this.linksWithHrefs.some(isActiveCheckFn);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Attribute, ChangeDetectorRef, ComponentFactoryResolver, ComponentRef, Directive, EventEmitter, Injector, OnDestroy, OnInit, Output, ViewContainerRef} from '@angular/core';\n\nimport {Data} from '../config';\nimport {ChildrenOutletContexts} from '../router_outlet_context';\nimport {ActivatedRoute} from '../router_state';\nimport {PRIMARY_OUTLET} from '../shared';\n\n/**\n * @description\n *\n * Acts as a placeholder that Angular dynamically fills based on the current router state.\n *\n * Each outlet can have a unique name, determined by the optional `name` attribute.\n * The name cannot be set or changed dynamically. If not set, default value is \"primary\".\n *\n * ```\n * <router-outlet></router-outlet>\n * <router-outlet name='left'></router-outlet>\n * <router-outlet name='right'></router-outlet>\n * ```\n *\n * Named outlets can be the targets of secondary routes.\n * The `Route` object for a secondary route has an `outlet` property to identify the target outlet:\n *\n * `{path: <base-path>, component: <component>, outlet: <target_outlet_name>}`\n *\n * Using named outlets and secondary routes, you can target multiple outlets in\n * the same `RouterLink` directive.\n *\n * The router keeps track of separate branches in a navigation tree for each named outlet and\n * generates a representation of that tree in the URL.\n * The URL for a secondary route uses the following syntax to specify both the primary and secondary\n * routes at the same time:\n *\n * `http://base-path/primary-route-path(outlet-name:route-path)`\n *\n * A router outlet emits an activate event when a new component is instantiated,\n * and a deactivate event when a component is destroyed.\n *\n * ```\n * <router-outlet\n *   (activate)='onActivate($event)'\n *   (deactivate)='onDeactivate($event)'></router-outlet>\n * ```\n *\n * @see [Routing tutorial](guide/router-tutorial-toh#named-outlets \"Example of a named\n * outlet and secondary route configuration\").\n * @see `RouterLink`\n * @see `Route`\n * @ngModule RouterModule\n *\n * @publicApi\n */\n@Directive({selector: 'router-outlet', exportAs: 'outlet'})\nexport class RouterOutlet implements OnDestroy, OnInit {\n  private activated: ComponentRef<any>|null = null;\n  private _activatedRoute: ActivatedRoute|null = null;\n  private name: string;\n\n  @Output('activate') activateEvents = new EventEmitter<any>();\n  @Output('deactivate') deactivateEvents = new EventEmitter<any>();\n\n  constructor(\n      private parentContexts: ChildrenOutletContexts, private location: ViewContainerRef,\n      private resolver: ComponentFactoryResolver, @Attribute('name') name: string,\n      private changeDetector: ChangeDetectorRef) {\n    this.name = name || PRIMARY_OUTLET;\n    parentContexts.onChildOutletCreated(this.name, this);\n  }\n\n  /** @nodoc */\n  ngOnDestroy(): void {\n    this.parentContexts.onChildOutletDestroyed(this.name);\n  }\n\n  /** @nodoc */\n  ngOnInit(): void {\n    if (!this.activated) {\n      // If the outlet was not instantiated at the time the route got activated we need to populate\n      // the outlet when it is initialized (ie inside a NgIf)\n      const context = this.parentContexts.getContext(this.name);\n      if (context && context.route) {\n        if (context.attachRef) {\n          // `attachRef` is populated when there is an existing component to mount\n          this.attach(context.attachRef, context.route);\n        } else {\n          // otherwise the component defined in the configuration is created\n          this.activateWith(context.route, context.resolver || null);\n        }\n      }\n    }\n  }\n\n  get isActivated(): boolean {\n    return !!this.activated;\n  }\n\n  get component(): Object {\n    if (!this.activated) throw new Error('Outlet is not activated');\n    return this.activated.instance;\n  }\n\n  get activatedRoute(): ActivatedRoute {\n    if (!this.activated) throw new Error('Outlet is not activated');\n    return this._activatedRoute as ActivatedRoute;\n  }\n\n  get activatedRouteData(): Data {\n    if (this._activatedRoute) {\n      return this._activatedRoute.snapshot.data;\n    }\n    return {};\n  }\n\n  /**\n   * Called when the `RouteReuseStrategy` instructs to detach the subtree\n   */\n  detach(): ComponentRef<any> {\n    if (!this.activated) throw new Error('Outlet is not activated');\n    this.location.detach();\n    const cmp = this.activated;\n    this.activated = null;\n    this._activatedRoute = null;\n    return cmp;\n  }\n\n  /**\n   * Called when the `RouteReuseStrategy` instructs to re-attach a previously detached subtree\n   */\n  attach(ref: ComponentRef<any>, activatedRoute: ActivatedRoute) {\n    this.activated = ref;\n    this._activatedRoute = activatedRoute;\n    this.location.insert(ref.hostView);\n  }\n\n  deactivate(): void {\n    if (this.activated) {\n      const c = this.component;\n      this.activated.destroy();\n      this.activated = null;\n      this._activatedRoute = null;\n      this.deactivateEvents.emit(c);\n    }\n  }\n\n  activateWith(activatedRoute: ActivatedRoute, resolver: ComponentFactoryResolver|null) {\n    if (this.isActivated) {\n      throw new Error('Cannot activate an already activated outlet');\n    }\n    this._activatedRoute = activatedRoute;\n    const snapshot = activatedRoute._futureSnapshot;\n    const component = <any>snapshot.routeConfig!.component;\n    resolver = resolver || this.resolver;\n    const factory = resolver.resolveComponentFactory(component);\n    const childContexts = this.parentContexts.getOrCreateContext(this.name).children;\n    const injector = new OutletInjector(activatedRoute, childContexts, this.location.injector);\n    this.activated = this.location.createComponent(factory, this.location.length, injector);\n    // Calling `markForCheck` to make sure we will run the change detection when the\n    // `RouterOutlet` is inside a `ChangeDetectionStrategy.OnPush` component.\n    this.changeDetector.markForCheck();\n    this.activateEvents.emit(this.activated.instance);\n  }\n}\n\nclass OutletInjector implements Injector {\n  constructor(\n      private route: ActivatedRoute, private childContexts: ChildrenOutletContexts,\n      private parent: Injector) {}\n\n  get(token: any, notFoundValue?: any): any {\n    if (token === ActivatedRoute) {\n      return this.route;\n    }\n\n    if (token === ChildrenOutletContexts) {\n      return this.childContexts;\n    }\n\n    return this.parent.get(token, notFoundValue);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Compiler, Injectable, Injector, NgModuleFactoryLoader, NgModuleRef, OnDestroy} from '@angular/core';\nimport {from, Observable, of, Subscription} from 'rxjs';\nimport {catchError, concatMap, filter, map, mergeAll, mergeMap} from 'rxjs/operators';\n\nimport {LoadedRouterConfig, Route, Routes} from './config';\nimport {Event, NavigationEnd, RouteConfigLoadEnd, RouteConfigLoadStart} from './events';\nimport {Router} from './router';\nimport {RouterConfigLoader} from './router_config_loader';\n\n\n/**\n * @description\n *\n * Provides a preloading strategy.\n *\n * @publicApi\n */\nexport abstract class PreloadingStrategy {\n  abstract preload(route: Route, fn: () => Observable<any>): Observable<any>;\n}\n\n/**\n * @description\n *\n * Provides a preloading strategy that preloads all modules as quickly as possible.\n *\n * ```\n * RouterModule.forRoot(ROUTES, {preloadingStrategy: PreloadAllModules})\n * ```\n *\n * @publicApi\n */\nexport class PreloadAllModules implements PreloadingStrategy {\n  preload(route: Route, fn: () => Observable<any>): Observable<any> {\n    return fn().pipe(catchError(() => of(null)));\n  }\n}\n\n/**\n * @description\n *\n * Provides a preloading strategy that does not preload any modules.\n *\n * This strategy is enabled by default.\n *\n * @publicApi\n */\nexport class NoPreloading implements PreloadingStrategy {\n  preload(route: Route, fn: () => Observable<any>): Observable<any> {\n    return of(null);\n  }\n}\n\n/**\n * The preloader optimistically loads all router configurations to\n * make navigations into lazily-loaded sections of the application faster.\n *\n * The preloader runs in the background. When the router bootstraps, the preloader\n * starts listening to all navigation events. After every such event, the preloader\n * will check if any configurations can be loaded lazily.\n *\n * If a route is protected by `canLoad` guards, the preloaded will not load it.\n *\n * @publicApi\n */\n@Injectable()\nexport class RouterPreloader implements OnDestroy {\n  private loader: RouterConfigLoader;\n  private subscription?: Subscription;\n\n  constructor(\n      private router: Router, moduleLoader: NgModuleFactoryLoader, compiler: Compiler,\n      private injector: Injector, private preloadingStrategy: PreloadingStrategy) {\n    const onStartLoad = (r: Route) => router.triggerEvent(new RouteConfigLoadStart(r));\n    const onEndLoad = (r: Route) => router.triggerEvent(new RouteConfigLoadEnd(r));\n\n    this.loader = new RouterConfigLoader(moduleLoader, compiler, onStartLoad, onEndLoad);\n  }\n\n  setUpPreloading(): void {\n    this.subscription =\n        this.router.events\n            .pipe(filter((e: Event) => e instanceof NavigationEnd), concatMap(() => this.preload()))\n            .subscribe(() => {});\n  }\n\n  preload(): Observable<any> {\n    const ngModule = this.injector.get(NgModuleRef);\n    return this.processRoutes(ngModule, this.router.config);\n  }\n\n  /** @nodoc */\n  ngOnDestroy(): void {\n    if (this.subscription) {\n      this.subscription.unsubscribe();\n    }\n  }\n\n  private processRoutes(ngModule: NgModuleRef<any>, routes: Routes): Observable<void> {\n    const res: Observable<any>[] = [];\n    for (const route of routes) {\n      // we already have the config loaded, just recurse\n      if (route.loadChildren && !route.canLoad && route._loadedConfig) {\n        const childConfig = route._loadedConfig;\n        res.push(this.processRoutes(childConfig.module, childConfig.routes));\n\n        // no config loaded, fetch the config\n      } else if (route.loadChildren && !route.canLoad) {\n        res.push(this.preloadConfig(ngModule, route));\n\n        // recurse into children\n      } else if (route.children) {\n        res.push(this.processRoutes(ngModule, route.children));\n      }\n    }\n    return from(res).pipe(mergeAll(), map((_) => void 0));\n  }\n\n  private preloadConfig(ngModule: NgModuleRef<any>, route: Route): Observable<void> {\n    return this.preloadingStrategy.preload(route, () => {\n      const loaded$ = this.loader.load(ngModule.injector, route);\n      return loaded$.pipe(mergeMap((config: LoadedRouterConfig) => {\n        route._loadedConfig = config;\n        return this.processRoutes(config.module, config.routes);\n      }));\n    });\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ViewportScroller} from '@angular/common';\nimport {Injectable, OnDestroy} from '@angular/core';\nimport {Unsubscribable} from 'rxjs';\n\nimport {NavigationEnd, NavigationStart, Scroll} from './events';\nimport {Router} from './router';\n\n@Injectable()\nexport class RouterScroller implements OnDestroy {\n  // TODO(issue/24571): remove '!'.\n  private routerEventsSubscription!: Unsubscribable;\n  // TODO(issue/24571): remove '!'.\n  private scrollEventsSubscription!: Unsubscribable;\n\n  private lastId = 0;\n  private lastSource: 'imperative'|'popstate'|'hashchange'|undefined = 'imperative';\n  private restoredId = 0;\n  private store: {[key: string]: [number, number]} = {};\n\n  constructor(\n      private router: Router,\n      /** @docsNotRequired */ public readonly viewportScroller: ViewportScroller, private options: {\n        scrollPositionRestoration?: 'disabled'|'enabled'|'top',\n        anchorScrolling?: 'disabled'|'enabled'\n      } = {}) {\n    // Default both options to 'disabled'\n    options.scrollPositionRestoration = options.scrollPositionRestoration || 'disabled';\n    options.anchorScrolling = options.anchorScrolling || 'disabled';\n  }\n\n  init(): void {\n    // we want to disable the automatic scrolling because having two places\n    // responsible for scrolling results race conditions, especially given\n    // that browser don't implement this behavior consistently\n    if (this.options.scrollPositionRestoration !== 'disabled') {\n      this.viewportScroller.setHistoryScrollRestoration('manual');\n    }\n    this.routerEventsSubscription = this.createScrollEvents();\n    this.scrollEventsSubscription = this.consumeScrollEvents();\n  }\n\n  private createScrollEvents() {\n    return this.router.events.subscribe(e => {\n      if (e instanceof NavigationStart) {\n        // store the scroll position of the current stable navigations.\n        this.store[this.lastId] = this.viewportScroller.getScrollPosition();\n        this.lastSource = e.navigationTrigger;\n        this.restoredId = e.restoredState ? e.restoredState.navigationId : 0;\n      } else if (e instanceof NavigationEnd) {\n        this.lastId = e.id;\n        this.scheduleScrollEvent(e, this.router.parseUrl(e.urlAfterRedirects).fragment);\n      }\n    });\n  }\n\n  private consumeScrollEvents() {\n    return this.router.events.subscribe(e => {\n      if (!(e instanceof Scroll)) return;\n      // a popstate event. The pop state event will always ignore anchor scrolling.\n      if (e.position) {\n        if (this.options.scrollPositionRestoration === 'top') {\n          this.viewportScroller.scrollToPosition([0, 0]);\n        } else if (this.options.scrollPositionRestoration === 'enabled') {\n          this.viewportScroller.scrollToPosition(e.position);\n        }\n        // imperative navigation \"forward\"\n      } else {\n        if (e.anchor && this.options.anchorScrolling === 'enabled') {\n          this.viewportScroller.scrollToAnchor(e.anchor);\n        } else if (this.options.scrollPositionRestoration !== 'disabled') {\n          this.viewportScroller.scrollToPosition([0, 0]);\n        }\n      }\n    });\n  }\n\n  private scheduleScrollEvent(routerEvent: NavigationEnd, anchor: string|null): void {\n    this.router.triggerEvent(new Scroll(\n        routerEvent, this.lastSource === 'popstate' ? this.store[this.restoredId] : null, anchor));\n  }\n\n  /** @nodoc */\n  ngOnDestroy() {\n    if (this.routerEventsSubscription) {\n      this.routerEventsSubscription.unsubscribe();\n    }\n    if (this.scrollEventsSubscription) {\n      this.scrollEventsSubscription.unsubscribe();\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {APP_BASE_HREF, HashLocationStrategy, Location, LOCATION_INITIALIZED, LocationStrategy, PathLocationStrategy, PlatformLocation, ViewportScroller, ɵgetDOM as getDOM} from '@angular/common';\nimport {ANALYZE_FOR_ENTRY_COMPONENTS, APP_BOOTSTRAP_LISTENER, APP_INITIALIZER, ApplicationRef, Compiler, ComponentRef, Inject, Injectable, InjectionToken, Injector, ModuleWithProviders, NgModule, NgModuleFactoryLoader, NgProbeToken, Optional, Provider, SkipSelf, SystemJsNgModuleLoader} from '@angular/core';\nimport {of, Subject} from 'rxjs';\n\nimport {EmptyOutletComponent} from './components/empty_outlet';\nimport {Route, Routes} from './config';\nimport {RouterLink, RouterLinkWithHref} from './directives/router_link';\nimport {RouterLinkActive} from './directives/router_link_active';\nimport {RouterOutlet} from './directives/router_outlet';\nimport {Event} from './events';\nimport {RouteReuseStrategy} from './route_reuse_strategy';\nimport {ErrorHandler, Router} from './router';\nimport {ROUTES} from './router_config_loader';\nimport {ChildrenOutletContexts} from './router_outlet_context';\nimport {NoPreloading, PreloadAllModules, PreloadingStrategy, RouterPreloader} from './router_preloader';\nimport {RouterScroller} from './router_scroller';\nimport {ActivatedRoute} from './router_state';\nimport {UrlHandlingStrategy} from './url_handling_strategy';\nimport {DefaultUrlSerializer, UrlSerializer, UrlTree} from './url_tree';\nimport {flatten} from './utils/collection';\n\n/**\n * The directives defined in the `RouterModule`.\n */\nconst ROUTER_DIRECTIVES =\n    [RouterOutlet, RouterLink, RouterLinkWithHref, RouterLinkActive, EmptyOutletComponent];\n\n/**\n * A [DI token](guide/glossary/#di-token) for the router service.\n *\n * @publicApi\n */\nexport const ROUTER_CONFIGURATION = new InjectionToken<ExtraOptions>('ROUTER_CONFIGURATION');\n\n/**\n * @docsNotRequired\n */\nexport const ROUTER_FORROOT_GUARD = new InjectionToken<void>('ROUTER_FORROOT_GUARD');\n\nexport const ROUTER_PROVIDERS: Provider[] = [\n  Location,\n  {provide: UrlSerializer, useClass: DefaultUrlSerializer},\n  {\n    provide: Router,\n    useFactory: setupRouter,\n    deps: [\n      UrlSerializer, ChildrenOutletContexts, Location, Injector, NgModuleFactoryLoader, Compiler,\n      ROUTES, ROUTER_CONFIGURATION, [UrlHandlingStrategy, new Optional()],\n      [RouteReuseStrategy, new Optional()]\n    ]\n  },\n  ChildrenOutletContexts,\n  {provide: ActivatedRoute, useFactory: rootRoute, deps: [Router]},\n  {provide: NgModuleFactoryLoader, useClass: SystemJsNgModuleLoader},\n  RouterPreloader,\n  NoPreloading,\n  PreloadAllModules,\n  {provide: ROUTER_CONFIGURATION, useValue: {enableTracing: false}},\n];\n\nexport function routerNgProbeToken() {\n  return new NgProbeToken('Router', Router);\n}\n\n/**\n * @description\n *\n * Adds directives and providers for in-app navigation among views defined in an application.\n * Use the Angular `Router` service to declaratively specify application states and manage state\n * transitions.\n *\n * You can import this NgModule multiple times, once for each lazy-loaded bundle.\n * However, only one `Router` service can be active.\n * To ensure this, there are two ways to register routes when importing this module:\n *\n * * The `forRoot()` method creates an `NgModule` that contains all the directives, the given\n * routes, and the `Router` service itself.\n * * The `forChild()` method creates an `NgModule` that contains all the directives and the given\n * routes, but does not include the `Router` service.\n *\n * @see [Routing and Navigation guide](guide/router) for an\n * overview of how the `Router` service should be used.\n *\n * @publicApi\n */\n@NgModule({\n  declarations: ROUTER_DIRECTIVES,\n  exports: ROUTER_DIRECTIVES,\n  entryComponents: [EmptyOutletComponent]\n})\nexport class RouterModule {\n  // Note: We are injecting the Router so it gets created eagerly...\n  constructor(@Optional() @Inject(ROUTER_FORROOT_GUARD) guard: any, @Optional() router: Router) {}\n\n  /**\n   * Creates and configures a module with all the router providers and directives.\n   * Optionally sets up an application listener to perform an initial navigation.\n   *\n   * When registering the NgModule at the root, import as follows:\n   *\n   * ```\n   * @NgModule({\n   *   imports: [RouterModule.forRoot(ROUTES)]\n   * })\n   * class MyNgModule {}\n   * ```\n   *\n   * @param routes An array of `Route` objects that define the navigation paths for the application.\n   * @param config An `ExtraOptions` configuration object that controls how navigation is performed.\n   * @return The new `NgModule`.\n   *\n   */\n  static forRoot(routes: Routes, config?: ExtraOptions): ModuleWithProviders<RouterModule> {\n    return {\n      ngModule: RouterModule,\n      providers: [\n        ROUTER_PROVIDERS,\n        provideRoutes(routes),\n        {\n          provide: ROUTER_FORROOT_GUARD,\n          useFactory: provideForRootGuard,\n          deps: [[Router, new Optional(), new SkipSelf()]]\n        },\n        {provide: ROUTER_CONFIGURATION, useValue: config ? config : {}},\n        {\n          provide: LocationStrategy,\n          useFactory: provideLocationStrategy,\n          deps:\n              [PlatformLocation, [new Inject(APP_BASE_HREF), new Optional()], ROUTER_CONFIGURATION]\n        },\n        {\n          provide: RouterScroller,\n          useFactory: createRouterScroller,\n          deps: [Router, ViewportScroller, ROUTER_CONFIGURATION]\n        },\n        {\n          provide: PreloadingStrategy,\n          useExisting: config && config.preloadingStrategy ? config.preloadingStrategy :\n                                                             NoPreloading\n        },\n        {provide: NgProbeToken, multi: true, useFactory: routerNgProbeToken},\n        provideRouterInitializer(),\n      ],\n    };\n  }\n\n  /**\n   * Creates a module with all the router directives and a provider registering routes,\n   * without creating a new Router service.\n   * When registering for submodules and lazy-loaded submodules, create the NgModule as follows:\n   *\n   * ```\n   * @NgModule({\n   *   imports: [RouterModule.forChild(ROUTES)]\n   * })\n   * class MyNgModule {}\n   * ```\n   *\n   * @param routes An array of `Route` objects that define the navigation paths for the submodule.\n   * @return The new NgModule.\n   *\n   */\n  static forChild(routes: Routes): ModuleWithProviders<RouterModule> {\n    return {ngModule: RouterModule, providers: [provideRoutes(routes)]};\n  }\n}\n\nexport function createRouterScroller(\n    router: Router, viewportScroller: ViewportScroller, config: ExtraOptions): RouterScroller {\n  if (config.scrollOffset) {\n    viewportScroller.setOffset(config.scrollOffset);\n  }\n  return new RouterScroller(router, viewportScroller, config);\n}\n\nexport function provideLocationStrategy(\n    platformLocationStrategy: PlatformLocation, baseHref: string, options: ExtraOptions = {}) {\n  return options.useHash ? new HashLocationStrategy(platformLocationStrategy, baseHref) :\n                           new PathLocationStrategy(platformLocationStrategy, baseHref);\n}\n\nexport function provideForRootGuard(router: Router): any {\n  if (router) {\n    throw new Error(\n        `RouterModule.forRoot() called twice. Lazy loaded modules should use RouterModule.forChild() instead.`);\n  }\n  return 'guarded';\n}\n\n/**\n * Registers a [DI provider](guide/glossary#provider) for a set of routes.\n * @param routes The route configuration to provide.\n *\n * @usageNotes\n *\n * ```\n * @NgModule({\n *   imports: [RouterModule.forChild(ROUTES)],\n *   providers: [provideRoutes(EXTRA_ROUTES)]\n * })\n * class MyNgModule {}\n * ```\n *\n * @publicApi\n */\nexport function provideRoutes(routes: Routes): any {\n  return [\n    {provide: ANALYZE_FOR_ENTRY_COMPONENTS, multi: true, useValue: routes},\n    {provide: ROUTES, multi: true, useValue: routes},\n  ];\n}\n\n/**\n * Allowed values in an `ExtraOptions` object that configure\n * when the router performs the initial navigation operation.\n *\n * * 'enabled' - The initial navigation starts before the root component is created.\n * The bootstrap is blocked until the initial navigation is complete. This value is required\n * for [server-side rendering](guide/universal) to work.\n * * 'disabled' - The initial navigation is not performed. The location listener is set up before\n * the root component gets created. Use if there is a reason to have\n * more control over when the router starts its initial navigation due to some complex\n * initialization logic.\n *\n * The following values have been [deprecated](guide/releases#deprecation-practices) since v4,\n * and should not be used for new applications.\n *\n * * 'legacy_enabled'- (Default, for compatibility.) The initial navigation starts after the root\n * component has been created. The bootstrap is not blocked until the initial navigation is\n * complete.\n * * 'legacy_disabled'- The initial navigation is not performed. The location listener is set up\n * after the root component gets created.\n * * `true` - same as 'legacy_enabled'.\n * * `false` - same as 'legacy_disabled'.\n *\n * The 'legacy_enabled' and 'legacy_disabled' should not be used for new applications.\n *\n * @see `forRoot()`\n *\n * @publicApi\n */\nexport type InitialNavigation = true|false|'enabled'|'disabled'|'legacy_enabled'|'legacy_disabled';\n\n/**\n * A set of configuration options for a router module, provided in the\n * `forRoot()` method.\n *\n * @see `forRoot()`\n *\n *\n * @publicApi\n */\nexport interface ExtraOptions {\n  /**\n   * When true, log all internal navigation events to the console.\n   * Use for debugging.\n   */\n  enableTracing?: boolean;\n\n  /**\n   * When true, enable the location strategy that uses the URL fragment\n   * instead of the history API.\n   */\n  useHash?: boolean;\n\n  /**\n   * One of `enabled` or `disabled`.\n   * When set to `enabled`, the initial navigation starts before the root component is created.\n   * The bootstrap is blocked until the initial navigation is complete. This value is required for\n   * [server-side rendering](guide/universal) to work.\n   * When set to `disabled`, the initial navigation is not performed.\n   * The location listener is set up before the root component gets created.\n   * Use if there is a reason to have more control over when the router\n   * starts its initial navigation due to some complex initialization logic.\n   *\n   * Legacy values are deprecated since v4 and should not be used for new applications:\n   *\n   * * `legacy_enabled` - Default for compatibility.\n   * The initial navigation starts after the root component has been created,\n   * but the bootstrap is not blocked until the initial navigation is complete.\n   * * `legacy_disabled` - The initial navigation is not performed.\n   * The location listener is set up after the root component gets created.\n   * * `true` - same as `legacy_enabled`.\n   * * `false` - same as `legacy_disabled`.\n   */\n  initialNavigation?: InitialNavigation;\n\n  /**\n   * A custom error handler for failed navigations.\n   * If the handler returns a value, the navigation Promise is resolved with this value.\n   * If the handler throws an exception, the navigation Promise is rejected with the exception.\n   *\n   */\n  errorHandler?: ErrorHandler;\n\n  /**\n   * Configures a preloading strategy.\n   * One of `PreloadAllModules` or `NoPreloading` (the default).\n   */\n  preloadingStrategy?: any;\n\n  /**\n   * Define what the router should do if it receives a navigation request to the current URL.\n   * Default is `ignore`, which causes the router ignores the navigation.\n   * This can disable features such as a \"refresh\" button.\n   * Use this option to configure the behavior when navigating to the\n   * current URL. Default is 'ignore'.\n   */\n  onSameUrlNavigation?: 'reload'|'ignore';\n\n  /**\n   * Configures if the scroll position needs to be restored when navigating back.\n   *\n   * * 'disabled'- (Default) Does nothing. Scroll position is maintained on navigation.\n   * * 'top'- Sets the scroll position to x = 0, y = 0 on all navigation.\n   * * 'enabled'- Restores the previous scroll position on backward navigation, else sets the\n   * position to the anchor if one is provided, or sets the scroll position to [0, 0] (forward\n   * navigation). This option will be the default in the future.\n   *\n   * You can implement custom scroll restoration behavior by adapting the enabled behavior as\n   * in the following example.\n   *\n   * ```typescript\n   * class AppModule {\n   *   constructor(router: Router, viewportScroller: ViewportScroller) {\n   *     router.events.pipe(\n   *       filter((e: Event): e is Scroll => e instanceof Scroll)\n   *     ).subscribe(e => {\n   *       if (e.position) {\n   *         // backward navigation\n   *         viewportScroller.scrollToPosition(e.position);\n   *       } else if (e.anchor) {\n   *         // anchor navigation\n   *         viewportScroller.scrollToAnchor(e.anchor);\n   *       } else {\n   *         // forward navigation\n   *         viewportScroller.scrollToPosition([0, 0]);\n   *       }\n   *     });\n   *   }\n   * }\n   * ```\n   */\n  scrollPositionRestoration?: 'disabled'|'enabled'|'top';\n\n  /**\n   * When set to 'enabled', scrolls to the anchor element when the URL has a fragment.\n   * Anchor scrolling is disabled by default.\n   *\n   * Anchor scrolling does not happen on 'popstate'. Instead, we restore the position\n   * that we stored or scroll to the top.\n   */\n  anchorScrolling?: 'disabled'|'enabled';\n\n  /**\n   * Configures the scroll offset the router will use when scrolling to an element.\n   *\n   * When given a tuple with x and y position value,\n   * the router uses that offset each time it scrolls.\n   * When given a function, the router invokes the function every time\n   * it restores scroll position.\n   */\n  scrollOffset?: [number, number]|(() => [number, number]);\n\n  /**\n   * Defines how the router merges parameters, data, and resolved data from parent to child\n   * routes. By default ('emptyOnly'), inherits parent parameters only for\n   * path-less or component-less routes.\n   * Set to 'always' to enable unconditional inheritance of parent parameters.\n   */\n  paramsInheritanceStrategy?: 'emptyOnly'|'always';\n\n  /**\n   * A custom handler for malformed URI errors. The handler is invoked when `encodedURI` contains\n   * invalid character sequences.\n   * The default implementation is to redirect to the root URL, dropping\n   * any path or parameter information. The function takes three parameters:\n   *\n   * - `'URIError'` - Error thrown when parsing a bad URL.\n   * - `'UrlSerializer'` - UrlSerializer that’s configured with the router.\n   * - `'url'` -  The malformed URL that caused the URIError\n   * */\n  malformedUriErrorHandler?:\n      (error: URIError, urlSerializer: UrlSerializer, url: string) => UrlTree;\n\n  /**\n   * Defines when the router updates the browser URL. By default ('deferred'),\n   * update after successful navigation.\n   * Set to 'eager' if prefer to update the URL at the beginning of navigation.\n   * Updating the URL early allows you to handle a failure of navigation by\n   * showing an error message with the URL that failed.\n   */\n  urlUpdateStrategy?: 'deferred'|'eager';\n\n  /**\n   * Enables a bug fix that corrects relative link resolution in components with empty paths.\n   * Example:\n   *\n   * ```\n   * const routes = [\n   *   {\n   *     path: '',\n   *     component: ContainerComponent,\n   *     children: [\n   *       { path: 'a', component: AComponent },\n   *       { path: 'b', component: BComponent },\n   *     ]\n   *   }\n   * ];\n   * ```\n   *\n   * From the `ContainerComponent`, this will not work:\n   *\n   * `<a [routerLink]=\"['./a']\">Link to A</a>`\n   *\n   * However, this will work:\n   *\n   * `<a [routerLink]=\"['../a']\">Link to A</a>`\n   *\n   * In other words, you're required to use `../` rather than `./`. This is currently the default\n   * behavior. Setting this option to `corrected` enables the fix.\n   */\n  relativeLinkResolution?: 'legacy'|'corrected';\n}\n\nexport function setupRouter(\n    urlSerializer: UrlSerializer, contexts: ChildrenOutletContexts, location: Location,\n    injector: Injector, loader: NgModuleFactoryLoader, compiler: Compiler, config: Route[][],\n    opts: ExtraOptions = {}, urlHandlingStrategy?: UrlHandlingStrategy,\n    routeReuseStrategy?: RouteReuseStrategy) {\n  const router = new Router(\n      null, urlSerializer, contexts, location, injector, loader, compiler, flatten(config));\n\n  if (urlHandlingStrategy) {\n    router.urlHandlingStrategy = urlHandlingStrategy;\n  }\n\n  if (routeReuseStrategy) {\n    router.routeReuseStrategy = routeReuseStrategy;\n  }\n\n  if (opts.errorHandler) {\n    router.errorHandler = opts.errorHandler;\n  }\n\n  if (opts.malformedUriErrorHandler) {\n    router.malformedUriErrorHandler = opts.malformedUriErrorHandler;\n  }\n\n  if (opts.enableTracing) {\n    const dom = getDOM();\n    router.events.subscribe((e: Event) => {\n      dom.logGroup(`Router Event: ${(<any>e.constructor).name}`);\n      dom.log(e.toString());\n      dom.log(e);\n      dom.logGroupEnd();\n    });\n  }\n\n  if (opts.onSameUrlNavigation) {\n    router.onSameUrlNavigation = opts.onSameUrlNavigation;\n  }\n\n  if (opts.paramsInheritanceStrategy) {\n    router.paramsInheritanceStrategy = opts.paramsInheritanceStrategy;\n  }\n\n  if (opts.urlUpdateStrategy) {\n    router.urlUpdateStrategy = opts.urlUpdateStrategy;\n  }\n\n  if (opts.relativeLinkResolution) {\n    router.relativeLinkResolution = opts.relativeLinkResolution;\n  }\n\n  return router;\n}\n\nexport function rootRoute(router: Router): ActivatedRoute {\n  return router.routerState.root;\n}\n\n/**\n * Router initialization requires two steps:\n *\n * First, we start the navigation in a `APP_INITIALIZER` to block the bootstrap if\n * a resolver or a guard executes asynchronously.\n *\n * Next, we actually run activation in a `BOOTSTRAP_LISTENER`, using the\n * `afterPreactivation` hook provided by the router.\n * The router navigation starts, reaches the point when preactivation is done, and then\n * pauses. It waits for the hook to be resolved. We then resolve it only in a bootstrap listener.\n */\n@Injectable()\nexport class RouterInitializer {\n  private initNavigation: boolean = false;\n  private resultOfPreactivationDone = new Subject<void>();\n\n  constructor(private injector: Injector) {}\n\n  appInitializer(): Promise<any> {\n    const p: Promise<any> = this.injector.get(LOCATION_INITIALIZED, Promise.resolve(null));\n    return p.then(() => {\n      let resolve: Function = null!;\n      const res = new Promise(r => resolve = r);\n      const router = this.injector.get(Router);\n      const opts = this.injector.get(ROUTER_CONFIGURATION);\n\n      if (this.isLegacyDisabled(opts) || this.isLegacyEnabled(opts)) {\n        resolve(true);\n\n      } else if (opts.initialNavigation === 'disabled') {\n        router.setUpLocationChangeListener();\n        resolve(true);\n\n      } else if (opts.initialNavigation === 'enabled') {\n        router.hooks.afterPreactivation = () => {\n          // only the initial navigation should be delayed\n          if (!this.initNavigation) {\n            this.initNavigation = true;\n            resolve(true);\n            return this.resultOfPreactivationDone;\n\n            // subsequent navigations should not be delayed\n          } else {\n            return of(null) as any;\n          }\n        };\n        router.initialNavigation();\n\n      } else {\n        throw new Error(`Invalid initialNavigation options: '${opts.initialNavigation}'`);\n      }\n\n      return res;\n    });\n  }\n\n  bootstrapListener(bootstrappedComponentRef: ComponentRef<any>): void {\n    const opts = this.injector.get(ROUTER_CONFIGURATION);\n    const preloader = this.injector.get(RouterPreloader);\n    const routerScroller = this.injector.get(RouterScroller);\n    const router = this.injector.get(Router);\n    const ref = this.injector.get<ApplicationRef>(ApplicationRef);\n\n    if (bootstrappedComponentRef !== ref.components[0]) {\n      return;\n    }\n\n    if (this.isLegacyEnabled(opts)) {\n      router.initialNavigation();\n    } else if (this.isLegacyDisabled(opts)) {\n      router.setUpLocationChangeListener();\n    }\n\n    preloader.setUpPreloading();\n    routerScroller.init();\n    router.resetRootComponentType(ref.componentTypes[0]);\n    this.resultOfPreactivationDone.next(null!);\n    this.resultOfPreactivationDone.complete();\n  }\n\n  private isLegacyEnabled(opts: ExtraOptions): boolean {\n    return opts.initialNavigation === 'legacy_enabled' || opts.initialNavigation === true ||\n        opts.initialNavigation === undefined;\n  }\n\n  private isLegacyDisabled(opts: ExtraOptions): boolean {\n    return opts.initialNavigation === 'legacy_disabled' || opts.initialNavigation === false;\n  }\n}\n\nexport function getAppInitializer(r: RouterInitializer) {\n  return r.appInitializer.bind(r);\n}\n\nexport function getBootstrapListener(r: RouterInitializer) {\n  return r.bootstrapListener.bind(r);\n}\n\n/**\n * A [DI token](guide/glossary/#di-token) for the router initializer that\n * is called after the app is bootstrapped.\n *\n * @publicApi\n */\nexport const ROUTER_INITIALIZER =\n    new InjectionToken<(compRef: ComponentRef<any>) => void>('Router Initializer');\n\nexport function provideRouterInitializer() {\n  return [\n    RouterInitializer,\n    {\n      provide: APP_INITIALIZER,\n      multi: true,\n      useFactory: getAppInitializer,\n      deps: [RouterInitializer]\n    },\n    {provide: ROUTER_INITIALIZER, useFactory: getBootstrapListener, deps: [RouterInitializer]},\n    {provide: APP_BOOTSTRAP_LISTENER, multi: true, useExisting: ROUTER_INITIALIZER},\n  ];\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @module\n * @description\n * Entry point for all public APIs of the common package.\n */\n\nimport {Version} from '@angular/core';\n\n/**\n * @publicApi\n */\nexport const VERSION = new Version('10.1.3');\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n\nexport {Data, DeprecatedLoadChildren, LoadChildren, LoadChildrenCallback, QueryParamsHandling, ResolveData, Route, Routes, RunGuardsAndResolvers, UrlMatcher, UrlMatchResult} from './config';\nexport {RouterLink, RouterLinkWithHref} from './directives/router_link';\nexport {RouterLinkActive} from './directives/router_link_active';\nexport {RouterOutlet} from './directives/router_outlet';\nexport {ActivationEnd, ActivationStart, ChildActivationEnd, ChildActivationStart, Event, GuardsCheckEnd, GuardsCheckStart, NavigationCancel, NavigationEnd, NavigationError, NavigationStart, ResolveEnd, ResolveStart, RouteConfigLoadEnd, RouteConfigLoadStart, RouterEvent, RoutesRecognized, Scroll} from './events';\nexport {CanActivate, CanActivateChild, CanDeactivate, CanLoad, Resolve} from './interfaces';\nexport {BaseRouteReuseStrategy, DetachedRouteHandle, RouteReuseStrategy} from './route_reuse_strategy';\nexport {Navigation, NavigationExtras, Router} from './router';\nexport {ROUTES} from './router_config_loader';\nexport {ExtraOptions, InitialNavigation, provideRoutes, ROUTER_CONFIGURATION, ROUTER_INITIALIZER, RouterModule} from './router_module';\nexport {ChildrenOutletContexts, OutletContext} from './router_outlet_context';\nexport {NoPreloading, PreloadAllModules, PreloadingStrategy, RouterPreloader} from './router_preloader';\nexport {ActivatedRoute, ActivatedRouteSnapshot, RouterState, RouterStateSnapshot} from './router_state';\nexport {convertToParamMap, ParamMap, Params, PRIMARY_OUTLET} from './shared';\nexport {UrlHandlingStrategy} from './url_handling_strategy';\nexport {DefaultUrlSerializer, UrlSegment, UrlSegmentGroup, UrlSerializer, UrlTree} from './url_tree';\nexport {VERSION} from './version';\n\nexport * from './private_export';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @module\n * @description\n * Entry point for all public APIs of this package.\n */\nexport * from './src/index';\n\n// This file only reexports content of the `src` folder. Keep it that way.\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n// This file is not used to build this module. It is only used during editing\n// by the TypeScript language service and during build for verification. `ngc`\n// replaces this file with production index.ts when it rewrites private symbol\n// names.\n\nexport * from './public_api';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './index';\n\nexport {EmptyOutletComponent as ɵangular_packages_router_router_l} from './src/components/empty_outlet';\nexport {ROUTER_FORROOT_GUARD as ɵangular_packages_router_router_a,RouterInitializer as ɵangular_packages_router_router_h,createRouterScroller as ɵangular_packages_router_router_c,getAppInitializer as ɵangular_packages_router_router_i,getBootstrapListener as ɵangular_packages_router_router_j,provideForRootGuard as ɵangular_packages_router_router_e,provideLocationStrategy as ɵangular_packages_router_router_d,provideRouterInitializer as ɵangular_packages_router_router_k,rootRoute as ɵangular_packages_router_router_g,routerNgProbeToken as ɵangular_packages_router_router_b,setupRouter as ɵangular_packages_router_router_f} from './src/router_module';\nexport {RouterScroller as ɵangular_packages_router_router_o} from './src/router_scroller';\nexport {Tree as ɵangular_packages_router_router_m,TreeNode as ɵangular_packages_router_router_n} from './src/utils/tree';","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/** IDs are delimited by an empty space, as per the spec. */\nconst ID_DELIMITER = ' ';\n\n/**\n * Adds the given ID to the specified ARIA attribute on an element.\n * Used for attributes such as aria-labelledby, aria-owns, etc.\n */\nexport function addAriaReferencedId(el: Element, attr: string, id: string) {\n  const ids = getAriaReferenceIds(el, attr);\n  if (ids.some(existingId => existingId.trim() == id.trim())) { return; }\n  ids.push(id.trim());\n\n  el.setAttribute(attr, ids.join(ID_DELIMITER));\n}\n\n/**\n * Removes the given ID from the specified ARIA attribute on an element.\n * Used for attributes such as aria-labelledby, aria-owns, etc.\n */\nexport function removeAriaReferencedId(el: Element, attr: string, id: string) {\n  const ids = getAriaReferenceIds(el, attr);\n  const filteredIds = ids.filter(val => val != id.trim());\n\n  if (filteredIds.length) {\n    el.setAttribute(attr, filteredIds.join(ID_DELIMITER));\n  } else {\n    el.removeAttribute(attr);\n  }\n}\n\n/**\n * Gets the list of IDs referenced by the given ARIA attribute on an element.\n * Used for attributes such as aria-labelledby, aria-owns, etc.\n */\nexport function getAriaReferenceIds(el: Element, attr: string): string[] {\n  // Get string array of all individual ids (whitespace delimited) in the attribute value\n  return (el.getAttribute(attr) || '').match(/\\S+/g) || [];\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT} from '@angular/common';\nimport {Inject, Injectable, OnDestroy} from '@angular/core';\nimport {addAriaReferencedId, getAriaReferenceIds, removeAriaReferencedId} from './aria-reference';\nimport {Platform} from '@angular/cdk/platform';\n\n\n/**\n * Interface used to register message elements and keep a count of how many registrations have\n * the same message and the reference to the message element used for the `aria-describedby`.\n */\nexport interface RegisteredMessage {\n  /** The element containing the message. */\n  messageElement: Element;\n\n  /** The number of elements that reference this message element via `aria-describedby`. */\n  referenceCount: number;\n}\n\n/** ID used for the body container where all messages are appended. */\nexport const MESSAGES_CONTAINER_ID = 'cdk-describedby-message-container';\n\n/** ID prefix used for each created message element. */\nexport const CDK_DESCRIBEDBY_ID_PREFIX = 'cdk-describedby-message';\n\n/** Attribute given to each host element that is described by a message element. */\nexport const CDK_DESCRIBEDBY_HOST_ATTRIBUTE = 'cdk-describedby-host';\n\n/** Global incremental identifier for each registered message element. */\nlet nextId = 0;\n\n/** Global map of all registered message elements that have been placed into the document. */\nconst messageRegistry = new Map<string|HTMLElement, RegisteredMessage>();\n\n/** Container for all registered messages. */\nlet messagesContainer: HTMLElement | null = null;\n\n/**\n * Utility that creates visually hidden elements with a message content. Useful for elements that\n * want to use aria-describedby to further describe themselves without adding additional visual\n * content.\n */\n@Injectable({providedIn: 'root'})\nexport class AriaDescriber implements OnDestroy {\n  private _document: Document;\n\n  constructor(\n    @Inject(DOCUMENT) _document: any,\n    /**\n     * @breaking-change 8.0.0 `_platform` parameter to be made required.\n     */\n    private _platform?: Platform) {\n    this._document = _document;\n  }\n\n  /**\n   * Adds to the host element an aria-describedby reference to a hidden element that contains\n   * the message. If the same message has already been registered, then it will reuse the created\n   * message element.\n   */\n  describe(hostElement: Element, message: string|HTMLElement) {\n    if (!this._canBeDescribed(hostElement, message)) {\n      return;\n    }\n\n    if (typeof message !== 'string') {\n      // We need to ensure that the element has an ID.\n      this._setMessageId(message);\n      messageRegistry.set(message, {messageElement: message, referenceCount: 0});\n    } else if (!messageRegistry.has(message)) {\n      this._createMessageElement(message);\n    }\n\n    if (!this._isElementDescribedByMessage(hostElement, message)) {\n      this._addMessageReference(hostElement, message);\n    }\n  }\n\n  /** Removes the host element's aria-describedby reference to the message element. */\n  removeDescription(hostElement: Element, message: string|HTMLElement) {\n    if (!message || !this._isElementNode(hostElement)) {\n      return;\n    }\n\n    if (this._isElementDescribedByMessage(hostElement, message)) {\n      this._removeMessageReference(hostElement, message);\n    }\n\n    // If the message is a string, it means that it's one that we created for the\n    // consumer so we can remove it safely, otherwise we should leave it in place.\n    if (typeof message === 'string') {\n      const registeredMessage = messageRegistry.get(message);\n      if (registeredMessage && registeredMessage.referenceCount === 0) {\n        this._deleteMessageElement(message);\n      }\n    }\n\n    if (messagesContainer && messagesContainer.childNodes.length === 0) {\n      this._deleteMessagesContainer();\n    }\n  }\n\n  /** Unregisters all created message elements and removes the message container. */\n  ngOnDestroy() {\n    const describedElements =\n        this._document.querySelectorAll(`[${CDK_DESCRIBEDBY_HOST_ATTRIBUTE}]`);\n\n    for (let i = 0; i < describedElements.length; i++) {\n      this._removeCdkDescribedByReferenceIds(describedElements[i]);\n      describedElements[i].removeAttribute(CDK_DESCRIBEDBY_HOST_ATTRIBUTE);\n    }\n\n    if (messagesContainer) {\n      this._deleteMessagesContainer();\n    }\n\n    messageRegistry.clear();\n  }\n\n  /**\n   * Creates a new element in the visually hidden message container element with the message\n   * as its content and adds it to the message registry.\n   */\n  private _createMessageElement(message: string) {\n    const messageElement = this._document.createElement('div');\n    this._setMessageId(messageElement);\n    messageElement.textContent = message;\n\n    this._createMessagesContainer();\n    messagesContainer!.appendChild(messageElement);\n\n    messageRegistry.set(message, {messageElement, referenceCount: 0});\n  }\n\n  /** Assigns a unique ID to an element, if it doesn't have one already. */\n  private _setMessageId(element: HTMLElement) {\n    if (!element.id) {\n      element.id = `${CDK_DESCRIBEDBY_ID_PREFIX}-${nextId++}`;\n    }\n  }\n\n  /** Deletes the message element from the global messages container. */\n  private _deleteMessageElement(message: string) {\n    const registeredMessage = messageRegistry.get(message);\n    const messageElement = registeredMessage && registeredMessage.messageElement;\n    if (messagesContainer && messageElement) {\n      messagesContainer.removeChild(messageElement);\n    }\n    messageRegistry.delete(message);\n  }\n\n  /** Creates the global container for all aria-describedby messages. */\n  private _createMessagesContainer() {\n    if (!messagesContainer) {\n      // @breaking-change 8.0.0 `_platform` null check can be removed once the parameter is required\n      const canBeAriaHidden = !this._platform || (!this._platform.EDGE && !this._platform.TRIDENT);\n      const preExistingContainer = this._document.getElementById(MESSAGES_CONTAINER_ID);\n\n      // When going from the server to the client, we may end up in a situation where there's\n      // already a container on the page, but we don't have a reference to it. Clear the\n      // old container so we don't get duplicates. Doing this, instead of emptying the previous\n      // container, should be slightly faster.\n      if (preExistingContainer && preExistingContainer.parentNode) {\n        preExistingContainer.parentNode.removeChild(preExistingContainer);\n      }\n\n      messagesContainer = this._document.createElement('div');\n      messagesContainer.id = MESSAGES_CONTAINER_ID;\n      messagesContainer.classList.add('cdk-visually-hidden');\n\n      // IE and Edge won't read out the messages if they're in an `aria-hidden` container.\n      // We only disable `aria-hidden` for these platforms, because it comes with the\n      // disadvantage that people might hit the messages when they've navigated past\n      // the end of the document using the arrow keys.\n      messagesContainer.setAttribute('aria-hidden', canBeAriaHidden + '');\n      this._document.body.appendChild(messagesContainer);\n    }\n  }\n\n  /** Deletes the global messages container. */\n  private _deleteMessagesContainer() {\n    if (messagesContainer && messagesContainer.parentNode) {\n      messagesContainer.parentNode.removeChild(messagesContainer);\n      messagesContainer = null;\n    }\n  }\n\n  /** Removes all cdk-describedby messages that are hosted through the element. */\n  private _removeCdkDescribedByReferenceIds(element: Element) {\n    // Remove all aria-describedby reference IDs that are prefixed by CDK_DESCRIBEDBY_ID_PREFIX\n    const originalReferenceIds = getAriaReferenceIds(element, 'aria-describedby')\n        .filter(id => id.indexOf(CDK_DESCRIBEDBY_ID_PREFIX) != 0);\n    element.setAttribute('aria-describedby', originalReferenceIds.join(' '));\n  }\n\n  /**\n   * Adds a message reference to the element using aria-describedby and increments the registered\n   * message's reference count.\n   */\n  private _addMessageReference(element: Element, message: string|HTMLElement) {\n    const registeredMessage = messageRegistry.get(message)!;\n\n    // Add the aria-describedby reference and set the\n    // describedby_host attribute to mark the element.\n    addAriaReferencedId(element, 'aria-describedby', registeredMessage.messageElement.id);\n    element.setAttribute(CDK_DESCRIBEDBY_HOST_ATTRIBUTE, '');\n\n    registeredMessage.referenceCount++;\n  }\n\n  /**\n   * Removes a message reference from the element using aria-describedby\n   * and decrements the registered message's reference count.\n   */\n  private _removeMessageReference(element: Element, message: string|HTMLElement) {\n    const registeredMessage = messageRegistry.get(message)!;\n    registeredMessage.referenceCount--;\n\n    removeAriaReferencedId(element, 'aria-describedby', registeredMessage.messageElement.id);\n    element.removeAttribute(CDK_DESCRIBEDBY_HOST_ATTRIBUTE);\n  }\n\n  /** Returns true if the element has been described by the provided message ID. */\n  private _isElementDescribedByMessage(element: Element, message: string|HTMLElement): boolean {\n    const referenceIds = getAriaReferenceIds(element, 'aria-describedby');\n    const registeredMessage = messageRegistry.get(message);\n    const messageId = registeredMessage && registeredMessage.messageElement.id;\n\n    return !!messageId && referenceIds.indexOf(messageId) != -1;\n  }\n\n  /** Determines whether a message can be described on a particular element. */\n  private _canBeDescribed(element: Element, message: string|HTMLElement|void): boolean {\n    if (!this._isElementNode(element)) {\n      return false;\n    }\n\n    if (message && typeof message === 'object') {\n      // We'd have to make some assumptions about the description element's text, if the consumer\n      // passed in an element. Assume that if an element is passed in, the consumer has verified\n      // that it can be used as a description.\n      return true;\n    }\n\n    const trimmedMessage = message == null ? '' : `${message}`.trim();\n    const ariaLabel = element.getAttribute('aria-label');\n\n    // We shouldn't set descriptions if they're exactly the same as the `aria-label` of the\n    // element, because screen readers will end up reading out the same text twice in a row.\n    return trimmedMessage ? (!ariaLabel || ariaLabel.trim() !== trimmedMessage) : false;\n  }\n\n  /** Checks whether a node is an Element node. */\n  private _isElementNode(element: Node): element is Element {\n    return element.nodeType === this._document.ELEMENT_NODE;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {QueryList} from '@angular/core';\nimport {Subject, Subscription} from 'rxjs';\nimport {\n  UP_ARROW,\n  DOWN_ARROW,\n  LEFT_ARROW,\n  RIGHT_ARROW,\n  TAB,\n  A,\n  Z,\n  ZERO,\n  NINE,\n  hasModifierKey,\n  HOME,\n  END,\n} from '@angular/cdk/keycodes';\nimport {debounceTime, filter, map, tap} from 'rxjs/operators';\n\n/** This interface is for items that can be passed to a ListKeyManager. */\nexport interface ListKeyManagerOption {\n  /** Whether the option is disabled. */\n  disabled?: boolean;\n\n  /** Gets the label for this option. */\n  getLabel?(): string;\n}\n\n/** Modifier keys handled by the ListKeyManager. */\nexport type ListKeyManagerModifierKey = 'altKey' | 'ctrlKey' | 'metaKey' | 'shiftKey';\n\n/**\n * This class manages keyboard events for selectable lists. If you pass it a query list\n * of items, it will set the active item correctly when arrow events occur.\n */\nexport class ListKeyManager<T extends ListKeyManagerOption> {\n  private _activeItemIndex = -1;\n  private _activeItem: T | null = null;\n  private _wrap = false;\n  private _letterKeyStream = new Subject<string>();\n  private _typeaheadSubscription = Subscription.EMPTY;\n  private _vertical = true;\n  private _horizontal: 'ltr' | 'rtl' | null;\n  private _allowedModifierKeys: ListKeyManagerModifierKey[] = [];\n  private _homeAndEnd = false;\n\n  /**\n   * Predicate function that can be used to check whether an item should be skipped\n   * by the key manager. By default, disabled items are skipped.\n   */\n  private _skipPredicateFn = (item: T) => item.disabled;\n\n  // Buffer for the letters that the user has pressed when the typeahead option is turned on.\n  private _pressedLetters: string[] = [];\n\n  constructor(private _items: QueryList<T> | T[]) {\n    // We allow for the items to be an array because, in some cases, the consumer may\n    // not have access to a QueryList of the items they want to manage (e.g. when the\n    // items aren't being collected via `ViewChildren` or `ContentChildren`).\n    if (_items instanceof QueryList) {\n      _items.changes.subscribe((newItems: QueryList<T>) => {\n        if (this._activeItem) {\n          const itemArray = newItems.toArray();\n          const newIndex = itemArray.indexOf(this._activeItem);\n\n          if (newIndex > -1 && newIndex !== this._activeItemIndex) {\n            this._activeItemIndex = newIndex;\n          }\n        }\n      });\n    }\n  }\n\n  /**\n   * Stream that emits any time the TAB key is pressed, so components can react\n   * when focus is shifted off of the list.\n   */\n  tabOut: Subject<void> = new Subject<void>();\n\n  /** Stream that emits whenever the active item of the list manager changes. */\n  change = new Subject<number>();\n\n  /**\n   * Sets the predicate function that determines which items should be skipped by the\n   * list key manager.\n   * @param predicate Function that determines whether the given item should be skipped.\n   */\n  skipPredicate(predicate: (item: T) => boolean): this {\n    this._skipPredicateFn = predicate;\n    return this;\n  }\n\n  /**\n   * Configures wrapping mode, which determines whether the active item will wrap to\n   * the other end of list when there are no more items in the given direction.\n   * @param shouldWrap Whether the list should wrap when reaching the end.\n   */\n  withWrap(shouldWrap = true): this {\n    this._wrap = shouldWrap;\n    return this;\n  }\n\n  /**\n   * Configures whether the key manager should be able to move the selection vertically.\n   * @param enabled Whether vertical selection should be enabled.\n   */\n  withVerticalOrientation(enabled: boolean = true): this {\n    this._vertical = enabled;\n    return this;\n  }\n\n  /**\n   * Configures the key manager to move the selection horizontally.\n   * Passing in `null` will disable horizontal movement.\n   * @param direction Direction in which the selection can be moved.\n   */\n  withHorizontalOrientation(direction: 'ltr' | 'rtl' | null): this {\n    this._horizontal = direction;\n    return this;\n  }\n\n  /**\n   * Modifier keys which are allowed to be held down and whose default actions will be prevented\n   * as the user is pressing the arrow keys. Defaults to not allowing any modifier keys.\n   */\n  withAllowedModifierKeys(keys: ListKeyManagerModifierKey[]): this {\n    this._allowedModifierKeys = keys;\n    return this;\n  }\n\n  /**\n   * Turns on typeahead mode which allows users to set the active item by typing.\n   * @param debounceInterval Time to wait after the last keystroke before setting the active item.\n   */\n  withTypeAhead(debounceInterval: number = 200): this {\n    if ((typeof ngDevMode === 'undefined' || ngDevMode) && (this._items.length &&\n        this._items.some(item => typeof item.getLabel !== 'function'))) {\n      throw Error('ListKeyManager items in typeahead mode must implement the `getLabel` method.');\n    }\n\n    this._typeaheadSubscription.unsubscribe();\n\n    // Debounce the presses of non-navigational keys, collect the ones that correspond to letters\n    // and convert those letters back into a string. Afterwards find the first item that starts\n    // with that string and select it.\n    this._typeaheadSubscription = this._letterKeyStream.pipe(\n      tap(letter => this._pressedLetters.push(letter)),\n      debounceTime(debounceInterval),\n      filter(() => this._pressedLetters.length > 0),\n      map(() => this._pressedLetters.join(''))\n    ).subscribe(inputString => {\n      const items = this._getItemsArray();\n\n      // Start at 1 because we want to start searching at the item immediately\n      // following the current active item.\n      for (let i = 1; i < items.length + 1; i++) {\n        const index = (this._activeItemIndex + i) % items.length;\n        const item = items[index];\n\n        if (!this._skipPredicateFn(item) &&\n            item.getLabel!().toUpperCase().trim().indexOf(inputString) === 0) {\n\n          this.setActiveItem(index);\n          break;\n        }\n      }\n\n      this._pressedLetters = [];\n    });\n\n    return this;\n  }\n\n  /**\n   * Configures the key manager to activate the first and last items\n   * respectively when the Home or End key is pressed.\n   * @param enabled Whether pressing the Home or End key activates the first/last item.\n   */\n  withHomeAndEnd(enabled: boolean = true): this {\n    this._homeAndEnd = enabled;\n    return this;\n  }\n\n  /**\n   * Sets the active item to the item at the index specified.\n   * @param index The index of the item to be set as active.\n   */\n  setActiveItem(index: number): void;\n\n  /**\n   * Sets the active item to the specified item.\n   * @param item The item to be set as active.\n   */\n  setActiveItem(item: T): void;\n\n  setActiveItem(item: any): void {\n    const previousActiveItem = this._activeItem;\n\n    this.updateActiveItem(item);\n\n    if (this._activeItem !== previousActiveItem) {\n      this.change.next(this._activeItemIndex);\n    }\n  }\n\n  /**\n   * Sets the active item depending on the key event passed in.\n   * @param event Keyboard event to be used for determining which element should be active.\n   */\n  onKeydown(event: KeyboardEvent): void {\n    const keyCode = event.keyCode;\n    const modifiers: ListKeyManagerModifierKey[] = ['altKey', 'ctrlKey', 'metaKey', 'shiftKey'];\n    const isModifierAllowed = modifiers.every(modifier => {\n      return !event[modifier] || this._allowedModifierKeys.indexOf(modifier) > -1;\n    });\n\n    switch (keyCode) {\n      case TAB:\n        this.tabOut.next();\n        return;\n\n      case DOWN_ARROW:\n        if (this._vertical && isModifierAllowed) {\n          this.setNextItemActive();\n          break;\n        } else {\n          return;\n        }\n\n      case UP_ARROW:\n        if (this._vertical && isModifierAllowed) {\n          this.setPreviousItemActive();\n          break;\n        } else {\n          return;\n        }\n\n      case RIGHT_ARROW:\n        if (this._horizontal && isModifierAllowed) {\n          this._horizontal === 'rtl' ? this.setPreviousItemActive() : this.setNextItemActive();\n          break;\n        } else {\n          return;\n        }\n\n      case LEFT_ARROW:\n        if (this._horizontal && isModifierAllowed) {\n          this._horizontal === 'rtl' ? this.setNextItemActive() : this.setPreviousItemActive();\n          break;\n        } else {\n          return;\n        }\n\n      case HOME:\n        if (this._homeAndEnd && isModifierAllowed) {\n          this.setFirstItemActive();\n          break;\n        } else {\n          return;\n        }\n\n      case END:\n        if (this._homeAndEnd && isModifierAllowed) {\n          this.setLastItemActive();\n          break;\n        } else {\n          return;\n        }\n\n      default:\n      if (isModifierAllowed || hasModifierKey(event, 'shiftKey')) {\n          // Attempt to use the `event.key` which also maps it to the user's keyboard language,\n          // otherwise fall back to resolving alphanumeric characters via the keyCode.\n          if (event.key && event.key.length === 1) {\n            this._letterKeyStream.next(event.key.toLocaleUpperCase());\n          } else if ((keyCode >= A && keyCode <= Z) || (keyCode >= ZERO && keyCode <= NINE)) {\n            this._letterKeyStream.next(String.fromCharCode(keyCode));\n          }\n        }\n\n        // Note that we return here, in order to avoid preventing\n        // the default action of non-navigational keys.\n        return;\n    }\n\n    this._pressedLetters = [];\n    event.preventDefault();\n  }\n\n  /** Index of the currently active item. */\n  get activeItemIndex(): number | null {\n    return this._activeItemIndex;\n  }\n\n  /** The active item. */\n  get activeItem(): T | null {\n    return this._activeItem;\n  }\n\n  /** Gets whether the user is currently typing into the manager using the typeahead feature. */\n  isTyping(): boolean {\n    return this._pressedLetters.length > 0;\n  }\n\n  /** Sets the active item to the first enabled item in the list. */\n  setFirstItemActive(): void {\n    this._setActiveItemByIndex(0, 1);\n  }\n\n  /** Sets the active item to the last enabled item in the list. */\n  setLastItemActive(): void {\n    this._setActiveItemByIndex(this._items.length - 1, -1);\n  }\n\n  /** Sets the active item to the next enabled item in the list. */\n  setNextItemActive(): void {\n    this._activeItemIndex < 0 ? this.setFirstItemActive() : this._setActiveItemByDelta(1);\n  }\n\n  /** Sets the active item to a previous enabled item in the list. */\n  setPreviousItemActive(): void {\n    this._activeItemIndex < 0 && this._wrap ? this.setLastItemActive()\n                                            : this._setActiveItemByDelta(-1);\n  }\n\n  /**\n   * Allows setting the active without any other effects.\n   * @param index Index of the item to be set as active.\n   */\n  updateActiveItem(index: number): void;\n\n  /**\n   * Allows setting the active item without any other effects.\n   * @param item Item to be set as active.\n   */\n  updateActiveItem(item: T): void;\n\n  updateActiveItem(item: any): void {\n    const itemArray = this._getItemsArray();\n    const index = typeof item === 'number' ? item : itemArray.indexOf(item);\n    const activeItem = itemArray[index];\n\n    // Explicitly check for `null` and `undefined` because other falsy values are valid.\n    this._activeItem = activeItem == null ? null : activeItem;\n    this._activeItemIndex = index;\n  }\n\n  /**\n   * This method sets the active item, given a list of items and the delta between the\n   * currently active item and the new active item. It will calculate differently\n   * depending on whether wrap mode is turned on.\n   */\n  private _setActiveItemByDelta(delta: -1 | 1): void {\n    this._wrap ? this._setActiveInWrapMode(delta) : this._setActiveInDefaultMode(delta);\n  }\n\n  /**\n   * Sets the active item properly given \"wrap\" mode. In other words, it will continue to move\n   * down the list until it finds an item that is not disabled, and it will wrap if it\n   * encounters either end of the list.\n   */\n  private _setActiveInWrapMode(delta: -1 | 1): void {\n    const items = this._getItemsArray();\n\n    for (let i = 1; i <= items.length; i++) {\n      const index = (this._activeItemIndex + (delta * i) + items.length) % items.length;\n      const item = items[index];\n\n      if (!this._skipPredicateFn(item)) {\n        this.setActiveItem(index);\n        return;\n      }\n    }\n  }\n\n  /**\n   * Sets the active item properly given the default mode. In other words, it will\n   * continue to move down the list until it finds an item that is not disabled. If\n   * it encounters either end of the list, it will stop and not wrap.\n   */\n  private _setActiveInDefaultMode(delta: -1 | 1): void {\n    this._setActiveItemByIndex(this._activeItemIndex + delta, delta);\n  }\n\n  /**\n   * Sets the active item to the first enabled item starting at the index specified. If the\n   * item is disabled, it will move in the fallbackDelta direction until it either\n   * finds an enabled item or encounters the end of the list.\n   */\n  private _setActiveItemByIndex(index: number, fallbackDelta: -1 | 1): void {\n    const items = this._getItemsArray();\n\n    if (!items[index]) {\n      return;\n    }\n\n    while (this._skipPredicateFn(items[index])) {\n      index += fallbackDelta;\n\n      if (!items[index]) {\n        return;\n      }\n    }\n\n    this.setActiveItem(index);\n  }\n\n  /** Returns the items as an array. */\n  private _getItemsArray(): T[] {\n    return this._items instanceof QueryList ? this._items.toArray() : this._items;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ListKeyManager, ListKeyManagerOption} from './list-key-manager';\n\n/**\n * This is the interface for highlightable items (used by the ActiveDescendantKeyManager).\n * Each item must know how to style itself as active or inactive and whether or not it is\n * currently disabled.\n */\nexport interface Highlightable extends ListKeyManagerOption {\n  /** Applies the styles for an active item to this item. */\n  setActiveStyles(): void;\n\n  /** Applies the styles for an inactive item to this item. */\n  setInactiveStyles(): void;\n}\n\nexport class ActiveDescendantKeyManager<T> extends ListKeyManager<Highlightable & T> {\n\n  /**\n   * Sets the active item to the item at the specified index and adds the\n   * active styles to the newly active item. Also removes active styles\n   * from the previously active item.\n   * @param index Index of the item to be set as active.\n   */\n  setActiveItem(index: number): void;\n\n  /**\n   * Sets the active item to the item to the specified one and adds the\n   * active styles to the it. Also removes active styles from the\n   * previously active item.\n   * @param item Item to be set as active.\n   */\n  setActiveItem(item: T): void;\n\n  setActiveItem(index: any): void {\n    if (this.activeItem) {\n      this.activeItem.setInactiveStyles();\n    }\n    super.setActiveItem(index);\n    if (this.activeItem) {\n      this.activeItem.setActiveStyles();\n    }\n  }\n\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ListKeyManager, ListKeyManagerOption} from './list-key-manager';\nimport {FocusOrigin} from '../focus-monitor/focus-monitor';\n\n/**\n * This is the interface for focusable items (used by the FocusKeyManager).\n * Each item must know how to focus itself, whether or not it is currently disabled\n * and be able to supply its label.\n */\nexport interface FocusableOption extends ListKeyManagerOption {\n  /** Focuses the `FocusableOption`. */\n  focus(origin?: FocusOrigin): void;\n}\n\nexport class FocusKeyManager<T> extends ListKeyManager<FocusableOption & T> {\n  private _origin: FocusOrigin = 'program';\n\n  /**\n   * Sets the focus origin that will be passed in to the items for any subsequent `focus` calls.\n   * @param origin Focus origin to be used when focusing items.\n   */\n  setFocusOrigin(origin: FocusOrigin): this {\n    this._origin = origin;\n    return this;\n  }\n\n  /**\n   * Sets the active item to the item at the specified\n   * index and focuses the newly active item.\n   * @param index Index of the item to be set as active.\n   */\n  setActiveItem(index: number): void;\n\n  /**\n   * Sets the active item to the item that is specified and focuses it.\n   * @param item Item to be set as active.\n   */\n  setActiveItem(item: T): void;\n\n  setActiveItem(item: any): void {\n    super.setActiveItem(item);\n\n    if (this.activeItem) {\n      this.activeItem.focus(this._origin);\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Platform} from '@angular/cdk/platform';\nimport {Injectable} from '@angular/core';\n\n/**\n * Configuration for the isFocusable method.\n */\nexport class IsFocusableConfig {\n  /**\n   * Whether to count an element as focusable even if it is not currently visible.\n   */\n  ignoreVisibility: boolean = false;\n}\n\n// The InteractivityChecker leans heavily on the ally.js accessibility utilities.\n// Methods like `isTabbable` are only covering specific edge-cases for the browsers which are\n// supported.\n\n/**\n * Utility for checking the interactivity of an element, such as whether is is focusable or\n * tabbable.\n */\n@Injectable({providedIn: 'root'})\nexport class InteractivityChecker {\n\n  constructor(private _platform: Platform) {}\n\n  /**\n   * Gets whether an element is disabled.\n   *\n   * @param element Element to be checked.\n   * @returns Whether the element is disabled.\n   */\n  isDisabled(element: HTMLElement): boolean {\n    // This does not capture some cases, such as a non-form control with a disabled attribute or\n    // a form control inside of a disabled form, but should capture the most common cases.\n    return element.hasAttribute('disabled');\n  }\n\n  /**\n   * Gets whether an element is visible for the purposes of interactivity.\n   *\n   * This will capture states like `display: none` and `visibility: hidden`, but not things like\n   * being clipped by an `overflow: hidden` parent or being outside the viewport.\n   *\n   * @returns Whether the element is visible.\n   */\n  isVisible(element: HTMLElement): boolean {\n    return hasGeometry(element) && getComputedStyle(element).visibility === 'visible';\n  }\n\n  /**\n   * Gets whether an element can be reached via Tab key.\n   * Assumes that the element has already been checked with isFocusable.\n   *\n   * @param element Element to be checked.\n   * @returns Whether the element is tabbable.\n   */\n  isTabbable(element: HTMLElement): boolean {\n    // Nothing is tabbable on the server 😎\n    if (!this._platform.isBrowser) {\n      return false;\n    }\n\n    const frameElement = getFrameElement(getWindow(element));\n\n    if (frameElement) {\n      // Frame elements inherit their tabindex onto all child elements.\n      if (getTabIndexValue(frameElement) === -1) {\n        return false;\n      }\n\n      // Browsers disable tabbing to an element inside of an invisible frame.\n      if (!this.isVisible(frameElement)) {\n        return false;\n      }\n    }\n\n    let nodeName = element.nodeName.toLowerCase();\n    let tabIndexValue = getTabIndexValue(element);\n\n    if (element.hasAttribute('contenteditable')) {\n      return tabIndexValue !== -1;\n    }\n\n    if (nodeName === 'iframe' || nodeName === 'object') {\n      // The frame or object's content may be tabbable depending on the content, but it's\n      // not possibly to reliably detect the content of the frames. We always consider such\n      // elements as non-tabbable.\n      return false;\n    }\n\n    // In iOS, the browser only considers some specific elements as tabbable.\n    if (this._platform.WEBKIT && this._platform.IOS && !isPotentiallyTabbableIOS(element)) {\n      return false;\n    }\n\n    if (nodeName === 'audio') {\n      // Audio elements without controls enabled are never tabbable, regardless\n      // of the tabindex attribute explicitly being set.\n      if (!element.hasAttribute('controls')) {\n        return false;\n      }\n      // Audio elements with controls are by default tabbable unless the\n      // tabindex attribute is set to `-1` explicitly.\n      return tabIndexValue !== -1;\n    }\n\n    if (nodeName === 'video') {\n      // For all video elements, if the tabindex attribute is set to `-1`, the video\n      // is not tabbable. Note: We cannot rely on the default `HTMLElement.tabIndex`\n      // property as that one is set to `-1` in Chrome, Edge and Safari v13.1. The\n      // tabindex attribute is the source of truth here.\n      if (tabIndexValue === -1) {\n        return false;\n      }\n      // If the tabindex is explicitly set, and not `-1` (as per check before), the\n      // video element is always tabbable (regardless of whether it has controls or not).\n      if (tabIndexValue !== null) {\n        return true;\n      }\n      // Otherwise (when no explicit tabindex is set), a video is only tabbable if it\n      // has controls enabled. Firefox is special as videos are always tabbable regardless\n      // of whether there are controls or not.\n      return this._platform.FIREFOX || element.hasAttribute('controls');\n    }\n\n    return element.tabIndex >= 0;\n  }\n\n  /**\n   * Gets whether an element can be focused by the user.\n   *\n   * @param element Element to be checked.\n   * @param config The config object with options to customize this method's behavior\n   * @returns Whether the element is focusable.\n   */\n  isFocusable(element: HTMLElement, config?: IsFocusableConfig): boolean {\n    // Perform checks in order of left to most expensive.\n    // Again, naive approach that does not capture many edge cases and browser quirks.\n    return isPotentiallyFocusable(element) && !this.isDisabled(element) &&\n      (config?.ignoreVisibility || this.isVisible(element));\n  }\n\n}\n\n/**\n * Returns the frame element from a window object. Since browsers like MS Edge throw errors if\n * the frameElement property is being accessed from a different host address, this property\n * should be accessed carefully.\n */\nfunction getFrameElement(window: Window) {\n  try {\n    return window.frameElement as HTMLElement;\n  } catch {\n    return null;\n  }\n}\n\n/** Checks whether the specified element has any geometry / rectangles. */\nfunction hasGeometry(element: HTMLElement): boolean {\n  // Use logic from jQuery to check for an invisible element.\n  // See https://github.com/jquery/jquery/blob/master/src/css/hiddenVisibleSelectors.js#L12\n  return !!(element.offsetWidth || element.offsetHeight ||\n      (typeof element.getClientRects === 'function' && element.getClientRects().length));\n}\n\n/** Gets whether an element's  */\nfunction isNativeFormElement(element: Node) {\n  let nodeName = element.nodeName.toLowerCase();\n  return nodeName === 'input' ||\n      nodeName === 'select' ||\n      nodeName === 'button' ||\n      nodeName === 'textarea';\n}\n\n/** Gets whether an element is an `<input type=\"hidden\">`. */\nfunction isHiddenInput(element: HTMLElement): boolean {\n  return isInputElement(element) && element.type == 'hidden';\n}\n\n/** Gets whether an element is an anchor that has an href attribute. */\nfunction isAnchorWithHref(element: HTMLElement): boolean {\n  return isAnchorElement(element) && element.hasAttribute('href');\n}\n\n/** Gets whether an element is an input element. */\nfunction isInputElement(element: HTMLElement): element is HTMLInputElement {\n  return element.nodeName.toLowerCase() == 'input';\n}\n\n/** Gets whether an element is an anchor element. */\nfunction isAnchorElement(element: HTMLElement): element is HTMLAnchorElement {\n  return element.nodeName.toLowerCase() == 'a';\n}\n\n/** Gets whether an element has a valid tabindex. */\nfunction hasValidTabIndex(element: HTMLElement): boolean {\n  if (!element.hasAttribute('tabindex') || element.tabIndex === undefined) {\n    return false;\n  }\n\n  let tabIndex = element.getAttribute('tabindex');\n\n  // IE11 parses tabindex=\"\" as the value \"-32768\"\n  if (tabIndex == '-32768') {\n    return false;\n  }\n\n  return !!(tabIndex && !isNaN(parseInt(tabIndex, 10)));\n}\n\n/**\n * Returns the parsed tabindex from the element attributes instead of returning the\n * evaluated tabindex from the browsers defaults.\n */\nfunction getTabIndexValue(element: HTMLElement): number | null {\n  if (!hasValidTabIndex(element)) {\n    return null;\n  }\n\n  // See browser issue in Gecko https://bugzilla.mozilla.org/show_bug.cgi?id=1128054\n  const tabIndex = parseInt(element.getAttribute('tabindex') || '', 10);\n\n  return isNaN(tabIndex) ? -1 : tabIndex;\n}\n\n/** Checks whether the specified element is potentially tabbable on iOS */\nfunction isPotentiallyTabbableIOS(element: HTMLElement): boolean {\n  let nodeName = element.nodeName.toLowerCase();\n  let inputType = nodeName === 'input' && (element as HTMLInputElement).type;\n\n  return inputType === 'text'\n      || inputType === 'password'\n      || nodeName === 'select'\n      || nodeName === 'textarea';\n}\n\n/**\n * Gets whether an element is potentially focusable without taking current visible/disabled state\n * into account.\n */\nfunction isPotentiallyFocusable(element: HTMLElement): boolean {\n  // Inputs are potentially focusable *unless* they're type=\"hidden\".\n  if (isHiddenInput(element)) {\n    return false;\n  }\n\n  return isNativeFormElement(element) ||\n      isAnchorWithHref(element) ||\n      element.hasAttribute('contenteditable') ||\n      hasValidTabIndex(element);\n}\n\n/** Gets the parent window of a DOM node with regards of being inside of an iframe. */\nfunction getWindow(node: HTMLElement): Window {\n  // ownerDocument is null if `node` itself *is* a document.\n  return node.ownerDocument && node.ownerDocument.defaultView || window;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {DOCUMENT} from '@angular/common';\nimport {\n  AfterContentInit,\n  Directive,\n  ElementRef,\n  Inject,\n  Injectable,\n  Input,\n  NgZone,\n  OnDestroy,\n  DoCheck,\n  SimpleChanges,\n  OnChanges,\n} from '@angular/core';\nimport {take} from 'rxjs/operators';\nimport {InteractivityChecker} from '../interactivity-checker/interactivity-checker';\n\n\n/**\n * Class that allows for trapping focus within a DOM element.\n *\n * This class currently uses a relatively simple approach to focus trapping.\n * It assumes that the tab order is the same as DOM order, which is not necessarily true.\n * Things like `tabIndex > 0`, flex `order`, and shadow roots can cause the two to misalign.\n *\n * @deprecated Use `ConfigurableFocusTrap` instead.\n * @breaking-change for 11.0.0 Remove this class.\n */\nexport class FocusTrap {\n  private _startAnchor: HTMLElement | null;\n  private _endAnchor: HTMLElement | null;\n  private _hasAttached = false;\n\n  // Event listeners for the anchors. Need to be regular functions so that we can unbind them later.\n  protected startAnchorListener = () => this.focusLastTabbableElement();\n  protected endAnchorListener = () => this.focusFirstTabbableElement();\n\n  /** Whether the focus trap is active. */\n  get enabled(): boolean { return this._enabled; }\n  set enabled(value: boolean) {\n    this._enabled = value;\n\n    if (this._startAnchor && this._endAnchor) {\n      this._toggleAnchorTabIndex(value, this._startAnchor);\n      this._toggleAnchorTabIndex(value, this._endAnchor);\n    }\n  }\n  protected _enabled: boolean = true;\n\n  constructor(\n    readonly _element: HTMLElement,\n    private _checker: InteractivityChecker,\n    readonly _ngZone: NgZone,\n    readonly _document: Document,\n    deferAnchors = false) {\n\n    if (!deferAnchors) {\n      this.attachAnchors();\n    }\n  }\n\n  /** Destroys the focus trap by cleaning up the anchors. */\n  destroy() {\n    const startAnchor = this._startAnchor;\n    const endAnchor = this._endAnchor;\n\n    if (startAnchor) {\n      startAnchor.removeEventListener('focus', this.startAnchorListener);\n\n      if (startAnchor.parentNode) {\n        startAnchor.parentNode.removeChild(startAnchor);\n      }\n    }\n\n    if (endAnchor) {\n      endAnchor.removeEventListener('focus', this.endAnchorListener);\n\n      if (endAnchor.parentNode) {\n        endAnchor.parentNode.removeChild(endAnchor);\n      }\n    }\n\n    this._startAnchor = this._endAnchor = null;\n    this._hasAttached = false;\n  }\n\n  /**\n   * Inserts the anchors into the DOM. This is usually done automatically\n   * in the constructor, but can be deferred for cases like directives with `*ngIf`.\n   * @returns Whether the focus trap managed to attach successfuly. This may not be the case\n   * if the target element isn't currently in the DOM.\n   */\n  attachAnchors(): boolean {\n    // If we're not on the browser, there can be no focus to trap.\n    if (this._hasAttached) {\n      return true;\n    }\n\n    this._ngZone.runOutsideAngular(() => {\n      if (!this._startAnchor) {\n        this._startAnchor = this._createAnchor();\n        this._startAnchor!.addEventListener('focus', this.startAnchorListener);\n      }\n\n      if (!this._endAnchor) {\n        this._endAnchor = this._createAnchor();\n        this._endAnchor!.addEventListener('focus', this.endAnchorListener);\n      }\n    });\n\n    if (this._element.parentNode) {\n      this._element.parentNode.insertBefore(this._startAnchor!, this._element);\n      this._element.parentNode.insertBefore(this._endAnchor!, this._element.nextSibling);\n      this._hasAttached = true;\n    }\n\n    return this._hasAttached;\n  }\n\n  /**\n   * Waits for the zone to stabilize, then either focuses the first element that the\n   * user specified, or the first tabbable element.\n   * @returns Returns a promise that resolves with a boolean, depending\n   * on whether focus was moved successfuly.\n   */\n  focusInitialElementWhenReady(): Promise<boolean> {\n    return new Promise<boolean>(resolve => {\n      this._executeOnStable(() => resolve(this.focusInitialElement()));\n    });\n  }\n\n  /**\n   * Waits for the zone to stabilize, then focuses\n   * the first tabbable element within the focus trap region.\n   * @returns Returns a promise that resolves with a boolean, depending\n   * on whether focus was moved successfuly.\n   */\n  focusFirstTabbableElementWhenReady(): Promise<boolean> {\n    return new Promise<boolean>(resolve => {\n      this._executeOnStable(() => resolve(this.focusFirstTabbableElement()));\n    });\n  }\n\n  /**\n   * Waits for the zone to stabilize, then focuses\n   * the last tabbable element within the focus trap region.\n   * @returns Returns a promise that resolves with a boolean, depending\n   * on whether focus was moved successfuly.\n   */\n  focusLastTabbableElementWhenReady(): Promise<boolean> {\n    return new Promise<boolean>(resolve => {\n      this._executeOnStable(() => resolve(this.focusLastTabbableElement()));\n    });\n  }\n\n  /**\n   * Get the specified boundary element of the trapped region.\n   * @param bound The boundary to get (start or end of trapped region).\n   * @returns The boundary element.\n   */\n  private _getRegionBoundary(bound: 'start' | 'end'): HTMLElement | null {\n    // Contains the deprecated version of selector, for temporary backwards comparability.\n    let markers = this._element.querySelectorAll(`[cdk-focus-region-${bound}], ` +\n                                                 `[cdkFocusRegion${bound}], ` +\n                                                 `[cdk-focus-${bound}]`) as NodeListOf<HTMLElement>;\n\n    for (let i = 0; i < markers.length; i++) {\n      // @breaking-change 8.0.0\n      if (markers[i].hasAttribute(`cdk-focus-${bound}`)) {\n        console.warn(`Found use of deprecated attribute 'cdk-focus-${bound}', ` +\n                     `use 'cdkFocusRegion${bound}' instead. The deprecated ` +\n                     `attribute will be removed in 8.0.0.`, markers[i]);\n      } else if (markers[i].hasAttribute(`cdk-focus-region-${bound}`)) {\n        console.warn(`Found use of deprecated attribute 'cdk-focus-region-${bound}', ` +\n                     `use 'cdkFocusRegion${bound}' instead. The deprecated attribute ` +\n                     `will be removed in 8.0.0.`, markers[i]);\n      }\n    }\n\n    if (bound == 'start') {\n      return markers.length ? markers[0] : this._getFirstTabbableElement(this._element);\n    }\n    return markers.length ?\n        markers[markers.length - 1] : this._getLastTabbableElement(this._element);\n  }\n\n  /**\n   * Focuses the element that should be focused when the focus trap is initialized.\n   * @returns Whether focus was moved successfuly.\n   */\n  focusInitialElement(): boolean {\n    // Contains the deprecated version of selector, for temporary backwards comparability.\n    const redirectToElement = this._element.querySelector(`[cdk-focus-initial], ` +\n                                                          `[cdkFocusInitial]`) as HTMLElement;\n\n    if (redirectToElement) {\n      // @breaking-change 8.0.0\n      if (redirectToElement.hasAttribute(`cdk-focus-initial`)) {\n        console.warn(`Found use of deprecated attribute 'cdk-focus-initial', ` +\n                    `use 'cdkFocusInitial' instead. The deprecated attribute ` +\n                    `will be removed in 8.0.0`, redirectToElement);\n      }\n\n      // Warn the consumer if the element they've pointed to\n      // isn't focusable, when not in production mode.\n      if ((typeof ngDevMode === 'undefined' || ngDevMode) &&\n        !this._checker.isFocusable(redirectToElement)) {\n        console.warn(`Element matching '[cdkFocusInitial]' is not focusable.`, redirectToElement);\n      }\n\n      redirectToElement.focus();\n      return true;\n    }\n\n    return this.focusFirstTabbableElement();\n  }\n\n  /**\n   * Focuses the first tabbable element within the focus trap region.\n   * @returns Whether focus was moved successfuly.\n   */\n  focusFirstTabbableElement(): boolean {\n    const redirectToElement = this._getRegionBoundary('start');\n\n    if (redirectToElement) {\n      redirectToElement.focus();\n    }\n\n    return !!redirectToElement;\n  }\n\n  /**\n   * Focuses the last tabbable element within the focus trap region.\n   * @returns Whether focus was moved successfuly.\n   */\n  focusLastTabbableElement(): boolean {\n    const redirectToElement = this._getRegionBoundary('end');\n\n    if (redirectToElement) {\n      redirectToElement.focus();\n    }\n\n    return !!redirectToElement;\n  }\n\n  /**\n   * Checks whether the focus trap has successfuly been attached.\n   */\n  hasAttached(): boolean {\n    return this._hasAttached;\n  }\n\n  /** Get the first tabbable element from a DOM subtree (inclusive). */\n  private _getFirstTabbableElement(root: HTMLElement): HTMLElement | null {\n    if (this._checker.isFocusable(root) && this._checker.isTabbable(root)) {\n      return root;\n    }\n\n    // Iterate in DOM order. Note that IE doesn't have `children` for SVG so we fall\n    // back to `childNodes` which includes text nodes, comments etc.\n    let children = root.children || root.childNodes;\n\n    for (let i = 0; i < children.length; i++) {\n      let tabbableChild = children[i].nodeType === this._document.ELEMENT_NODE ?\n        this._getFirstTabbableElement(children[i] as HTMLElement) :\n        null;\n\n      if (tabbableChild) {\n        return tabbableChild;\n      }\n    }\n\n    return null;\n  }\n\n  /** Get the last tabbable element from a DOM subtree (inclusive). */\n  private _getLastTabbableElement(root: HTMLElement): HTMLElement | null {\n    if (this._checker.isFocusable(root) && this._checker.isTabbable(root)) {\n      return root;\n    }\n\n    // Iterate in reverse DOM order.\n    let children = root.children || root.childNodes;\n\n    for (let i = children.length - 1; i >= 0; i--) {\n      let tabbableChild = children[i].nodeType === this._document.ELEMENT_NODE ?\n        this._getLastTabbableElement(children[i] as HTMLElement) :\n        null;\n\n      if (tabbableChild) {\n        return tabbableChild;\n      }\n    }\n\n    return null;\n  }\n\n  /** Creates an anchor element. */\n  private _createAnchor(): HTMLElement {\n    const anchor = this._document.createElement('div');\n    this._toggleAnchorTabIndex(this._enabled, anchor);\n    anchor.classList.add('cdk-visually-hidden');\n    anchor.classList.add('cdk-focus-trap-anchor');\n    anchor.setAttribute('aria-hidden', 'true');\n    return anchor;\n  }\n\n  /**\n   * Toggles the `tabindex` of an anchor, based on the enabled state of the focus trap.\n   * @param isEnabled Whether the focus trap is enabled.\n   * @param anchor Anchor on which to toggle the tabindex.\n   */\n  private _toggleAnchorTabIndex(isEnabled: boolean, anchor: HTMLElement) {\n    // Remove the tabindex completely, rather than setting it to -1, because if the\n    // element has a tabindex, the user might still hit it when navigating with the arrow keys.\n    isEnabled ? anchor.setAttribute('tabindex', '0') : anchor.removeAttribute('tabindex');\n  }\n\n  /**\n   * Toggles the`tabindex` of both anchors to either trap Tab focus or allow it to escape.\n   * @param enabled: Whether the anchors should trap Tab.\n   */\n  protected toggleAnchors(enabled: boolean) {\n    if (this._startAnchor && this._endAnchor) {\n      this._toggleAnchorTabIndex(enabled, this._startAnchor);\n      this._toggleAnchorTabIndex(enabled, this._endAnchor);\n    }\n  }\n\n  /** Executes a function when the zone is stable. */\n  private _executeOnStable(fn: () => any): void {\n    if (this._ngZone.isStable) {\n      fn();\n    } else {\n      this._ngZone.onStable.pipe(take(1)).subscribe(fn);\n    }\n  }\n}\n\n/**\n * Factory that allows easy instantiation of focus traps.\n * @deprecated Use `ConfigurableFocusTrapFactory` instead.\n * @breaking-change for 11.0.0 Remove this class.\n */\n@Injectable({providedIn: 'root'})\nexport class FocusTrapFactory {\n  private _document: Document;\n\n  constructor(\n      private _checker: InteractivityChecker,\n      private _ngZone: NgZone,\n      @Inject(DOCUMENT) _document: any) {\n\n    this._document = _document;\n  }\n\n  /**\n   * Creates a focus-trapped region around the given element.\n   * @param element The element around which focus will be trapped.\n   * @param deferCaptureElements Defers the creation of focus-capturing elements to be done\n   *     manually by the user.\n   * @returns The created focus trap instance.\n   */\n  create(element: HTMLElement, deferCaptureElements: boolean = false): FocusTrap {\n    return new FocusTrap(\n        element, this._checker, this._ngZone, this._document, deferCaptureElements);\n  }\n}\n\n/** Directive for trapping focus within a region. */\n@Directive({\n  selector: '[cdkTrapFocus]',\n  exportAs: 'cdkTrapFocus',\n})\nexport class CdkTrapFocus implements OnDestroy, AfterContentInit, OnChanges, DoCheck {\n  private _document: Document;\n\n  /** Underlying FocusTrap instance. */\n  focusTrap: FocusTrap;\n\n  /** Previously focused element to restore focus to upon destroy when using autoCapture. */\n  private _previouslyFocusedElement: HTMLElement | null = null;\n\n  /** Whether the focus trap is active. */\n  @Input('cdkTrapFocus')\n  get enabled(): boolean { return this.focusTrap.enabled; }\n  set enabled(value: boolean) { this.focusTrap.enabled = coerceBooleanProperty(value); }\n\n  /**\n   * Whether the directive should automatially move focus into the trapped region upon\n   * initialization and return focus to the previous activeElement upon destruction.\n   */\n  @Input('cdkTrapFocusAutoCapture')\n  get autoCapture(): boolean { return this._autoCapture; }\n  set autoCapture(value: boolean) { this._autoCapture = coerceBooleanProperty(value); }\n  private _autoCapture: boolean;\n\n  constructor(\n      private _elementRef: ElementRef<HTMLElement>,\n      private _focusTrapFactory: FocusTrapFactory,\n      @Inject(DOCUMENT) _document: any) {\n\n    this._document = _document;\n    this.focusTrap = this._focusTrapFactory.create(this._elementRef.nativeElement, true);\n  }\n\n  ngOnDestroy() {\n    this.focusTrap.destroy();\n\n    // If we stored a previously focused element when using autoCapture, return focus to that\n    // element now that the trapped region is being destroyed.\n    if (this._previouslyFocusedElement) {\n      this._previouslyFocusedElement.focus();\n      this._previouslyFocusedElement = null;\n    }\n  }\n\n  ngAfterContentInit() {\n    this.focusTrap.attachAnchors();\n\n    if (this.autoCapture) {\n      this._captureFocus();\n    }\n  }\n\n  ngDoCheck() {\n    if (!this.focusTrap.hasAttached()) {\n      this.focusTrap.attachAnchors();\n    }\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    const autoCaptureChange = changes['autoCapture'];\n\n    if (autoCaptureChange && !autoCaptureChange.firstChange && this.autoCapture &&\n        this.focusTrap.hasAttached()) {\n      this._captureFocus();\n    }\n  }\n\n  private _captureFocus() {\n    this._previouslyFocusedElement = this._document.activeElement as HTMLElement;\n    this.focusTrap.focusInitialElementWhenReady();\n  }\n\n  static ngAcceptInputType_enabled: BooleanInput;\n  static ngAcceptInputType_autoCapture: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgZone} from '@angular/core';\nimport {InteractivityChecker} from '../interactivity-checker/interactivity-checker';\nimport {FocusTrap} from './focus-trap';\nimport {FocusTrapManager, ManagedFocusTrap} from './focus-trap-manager';\nimport {FocusTrapInertStrategy} from './focus-trap-inert-strategy';\nimport {ConfigurableFocusTrapConfig} from './configurable-focus-trap-config';\n\n/**\n * Class that allows for trapping focus within a DOM element.\n *\n * This class uses a strategy pattern that determines how it traps focus.\n * See FocusTrapInertStrategy.\n */\nexport class ConfigurableFocusTrap extends FocusTrap implements ManagedFocusTrap {\n  /** Whether the FocusTrap is enabled. */\n  get enabled(): boolean { return this._enabled; }\n  set enabled(value: boolean) {\n    this._enabled = value;\n    if (this._enabled) {\n      this._focusTrapManager.register(this);\n    } else {\n      this._focusTrapManager.deregister(this);\n    }\n  }\n\n  constructor(\n    _element: HTMLElement,\n    _checker: InteractivityChecker,\n    _ngZone: NgZone,\n    _document: Document,\n    private _focusTrapManager: FocusTrapManager,\n    private _inertStrategy: FocusTrapInertStrategy,\n    config: ConfigurableFocusTrapConfig) {\n    super(_element, _checker, _ngZone, _document, config.defer);\n    this._focusTrapManager.register(this);\n  }\n\n  /** Notifies the FocusTrapManager that this FocusTrap will be destroyed. */\n  destroy() {\n    this._focusTrapManager.deregister(this);\n    super.destroy();\n  }\n\n  /** @docs-private Implemented as part of ManagedFocusTrap. */\n  _enable() {\n    this._inertStrategy.preventFocus(this);\n    this.toggleAnchors(true);\n  }\n\n  /** @docs-private Implemented as part of ManagedFocusTrap. */\n  _disable() {\n    this._inertStrategy.allowFocus(this);\n    this.toggleAnchors(false);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/** IE 11 compatible closest implementation that is able to start from non-Element Nodes. */\nexport function closest(element: EventTarget|Element|null|undefined, selector: string):\n    Element|null {\n  if (!(element instanceof Node)) { return null; }\n\n  let curr: Node|null = element;\n  while (curr != null && !(curr instanceof Element)) {\n    curr = curr.parentNode;\n  }\n\n  return curr && (hasNativeClosest ?\n      curr.closest(selector) : polyfillClosest(curr, selector)) as Element|null;\n}\n\n/** Polyfill for browsers without Element.closest. */\nfunction polyfillClosest(element: Element, selector: string): Element|null {\n  let curr: Node|null = element;\n  while (curr != null && !(curr instanceof Element && matches(curr, selector))) {\n    curr = curr.parentNode;\n  }\n\n  return (curr || null) as Element|null;\n}\n\nconst hasNativeClosest = typeof Element != 'undefined' && !!Element.prototype.closest;\n\n/** IE 11 compatible matches implementation. */\nfunction matches(element: Element, selector: string): boolean {\n  return element.matches ?\n      element.matches(selector) :\n      (element as any)['msMatchesSelector'](selector);\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {FocusTrapInertStrategy} from './focus-trap-inert-strategy';\nimport {ConfigurableFocusTrap} from './configurable-focus-trap';\nimport {closest} from './polyfill';\n\n/**\n * Lightweight FocusTrapInertStrategy that adds a document focus event\n * listener to redirect focus back inside the FocusTrap.\n */\nexport class EventListenerFocusTrapInertStrategy implements FocusTrapInertStrategy {\n  /** Focus event handler. */\n  private _listener: ((e: FocusEvent) => void) | null = null;\n\n  /** Adds a document event listener that keeps focus inside the FocusTrap. */\n  preventFocus(focusTrap: ConfigurableFocusTrap): void {\n    // Ensure there's only one listener per document\n    if (this._listener) {\n      focusTrap._document.removeEventListener('focus', this._listener!, true);\n    }\n\n    this._listener = (e: FocusEvent) => this._trapFocus(focusTrap, e);\n    focusTrap._ngZone.runOutsideAngular(() => {\n      focusTrap._document.addEventListener('focus', this._listener!, true);\n    });\n  }\n\n  /** Removes the event listener added in preventFocus. */\n  allowFocus(focusTrap: ConfigurableFocusTrap): void {\n    if (!this._listener) {\n      return;\n    }\n    focusTrap._document.removeEventListener('focus', this._listener!, true);\n    this._listener = null;\n  }\n\n  /**\n   * Refocuses the first element in the FocusTrap if the focus event target was outside\n   * the FocusTrap.\n   *\n   * This is an event listener callback. The event listener is added in runOutsideAngular,\n   * so all this code runs outside Angular as well.\n   */\n  private _trapFocus(focusTrap: ConfigurableFocusTrap, event: FocusEvent) {\n    const target = event.target as HTMLElement;\n    const focusTrapRoot = focusTrap._element;\n\n    // Don't refocus if target was in an overlay, because the overlay might be associated\n    // with an element inside the FocusTrap, ex. mat-select.\n    if (!focusTrapRoot.contains(target) && closest(target, 'div.cdk-overlay-pane') === null) {\n        // Some legacy FocusTrap usages have logic that focuses some element on the page\n        // just before FocusTrap is destroyed. For backwards compatibility, wait\n        // to be sure FocusTrap is still enabled before refocusing.\n        setTimeout(() => {\n          // Check whether focus wasn't put back into the focus trap while the timeout was pending.\n          if (focusTrap.enabled && !focusTrapRoot.contains(focusTrap._document.activeElement)) {\n            focusTrap.focusFirstTabbableElement();\n          }\n        });\n      }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * Configuration for creating a ConfigurableFocusTrap.\n */\nexport class ConfigurableFocusTrapConfig {\n  /**\n   * Whether to defer the creation of FocusTrap elements to be\n   * done manually by the user. Default is to create them\n   * automatically.\n   */\n  defer: boolean = false;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {\n  InjectionToken,\n} from '@angular/core';\nimport {FocusTrap} from './focus-trap';\n\n/** The injection token used to specify the inert strategy. */\nexport const FOCUS_TRAP_INERT_STRATEGY =\n  new InjectionToken<FocusTrapInertStrategy>('FOCUS_TRAP_INERT_STRATEGY');\n\n/**\n * A strategy that dictates how FocusTrap should prevent elements\n * outside of the FocusTrap from being focused.\n */\nexport interface FocusTrapInertStrategy {\n  /** Makes all elements outside focusTrap unfocusable. */\n  preventFocus(focusTrap: FocusTrap): void;\n  /** Reverts elements made unfocusable by preventFocus to their previous state. */\n  allowFocus(focusTrap: FocusTrap): void;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable} from '@angular/core';\n\n/**\n * A FocusTrap managed by FocusTrapManager.\n * Implemented by ConfigurableFocusTrap to avoid circular dependency.\n */\nexport interface ManagedFocusTrap {\n  _enable(): void;\n  _disable(): void;\n  focusInitialElementWhenReady(): Promise<boolean>;\n}\n\n/** Injectable that ensures only the most recently enabled FocusTrap is active. */\n@Injectable({providedIn: 'root'})\nexport class FocusTrapManager {\n  // A stack of the FocusTraps on the page. Only the FocusTrap at the\n  // top of the stack is active.\n  private _focusTrapStack: ManagedFocusTrap[] = [];\n\n  /**\n   * Disables the FocusTrap at the top of the stack, and then pushes\n   * the new FocusTrap onto the stack.\n   */\n  register(focusTrap: ManagedFocusTrap): void {\n    // Dedupe focusTraps that register multiple times.\n    this._focusTrapStack = this._focusTrapStack.filter((ft) => ft !== focusTrap);\n\n    let stack = this._focusTrapStack;\n\n    if (stack.length) {\n      stack[stack.length - 1]._disable();\n    }\n\n    stack.push(focusTrap);\n    focusTrap._enable();\n  }\n\n  /**\n   * Removes the FocusTrap from the stack, and activates the\n   * FocusTrap that is the new top of the stack.\n   */\n  deregister(focusTrap: ManagedFocusTrap): void {\n    focusTrap._disable();\n\n    const stack = this._focusTrapStack;\n\n    const i = stack.indexOf(focusTrap);\n    if (i !== -1) {\n      stack.splice(i, 1);\n      if (stack.length) {\n        stack[stack.length - 1]._enable();\n      }\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT} from '@angular/common';\nimport {\n  Inject,\n  Injectable,\n  Optional,\n  NgZone,\n} from '@angular/core';\nimport {InteractivityChecker} from '../interactivity-checker/interactivity-checker';\nimport {ConfigurableFocusTrap} from './configurable-focus-trap';\nimport {ConfigurableFocusTrapConfig} from './configurable-focus-trap-config';\nimport {FOCUS_TRAP_INERT_STRATEGY, FocusTrapInertStrategy} from './focus-trap-inert-strategy';\nimport {EventListenerFocusTrapInertStrategy} from './event-listener-inert-strategy';\nimport {FocusTrapManager} from './focus-trap-manager';\n\n/** Factory that allows easy instantiation of configurable focus traps. */\n@Injectable({providedIn: 'root'})\nexport class ConfigurableFocusTrapFactory {\n  private _document: Document;\n  private _inertStrategy: FocusTrapInertStrategy;\n\n  constructor(\n      private _checker: InteractivityChecker,\n      private _ngZone: NgZone,\n      private _focusTrapManager: FocusTrapManager,\n      @Inject(DOCUMENT) _document: any,\n      @Optional() @Inject(FOCUS_TRAP_INERT_STRATEGY) _inertStrategy?: FocusTrapInertStrategy) {\n\n    this._document = _document;\n    // TODO split up the strategies into different modules, similar to DateAdapter.\n    this._inertStrategy = _inertStrategy || new EventListenerFocusTrapInertStrategy();\n  }\n\n  /**\n   * Creates a focus-trapped region around the given element.\n   * @param element The element around which focus will be trapped.\n   * @param config The focus trap configuration.\n   * @returns The created focus trap instance.\n   */\n  create(element: HTMLElement, config?: ConfigurableFocusTrapConfig): ConfigurableFocusTrap;\n\n  /**\n   * @deprecated Pass a config object instead of the `deferCaptureElements` flag.\n   * @breaking-change 11.0.0\n   */\n  create(element: HTMLElement, deferCaptureElements: boolean): ConfigurableFocusTrap;\n\n  create(element: HTMLElement, config: ConfigurableFocusTrapConfig | boolean =\n    new ConfigurableFocusTrapConfig()): ConfigurableFocusTrap {\n    let configObject: ConfigurableFocusTrapConfig;\n    if (typeof config === 'boolean') {\n      configObject = new ConfigurableFocusTrapConfig();\n      configObject.defer = config;\n    } else {\n      configObject = config;\n    }\n    return new ConfigurableFocusTrap(\n        element, this._checker, this._ngZone, this._document, this._focusTrapManager,\n        this._inertStrategy, configObject);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {InjectionToken} from '@angular/core';\n\n// The tokens for the live announcer are defined in a separate file from LiveAnnouncer\n// as a workaround for https://github.com/angular/angular/issues/22559\n\n/** Possible politeness levels. */\nexport type AriaLivePoliteness = 'off' | 'polite' | 'assertive';\n\nexport const LIVE_ANNOUNCER_ELEMENT_TOKEN =\n    new InjectionToken<HTMLElement | null>('liveAnnouncerElement', {\n      providedIn: 'root',\n      factory: LIVE_ANNOUNCER_ELEMENT_TOKEN_FACTORY,\n    });\n\n/** @docs-private */\nexport function LIVE_ANNOUNCER_ELEMENT_TOKEN_FACTORY(): null {\n  return null;\n}\n\n/** Object that can be used to configure the default options for the LiveAnnouncer. */\nexport interface LiveAnnouncerDefaultOptions {\n  /** Default politeness for the announcements. */\n  politeness?: AriaLivePoliteness;\n\n  /** Default duration for the announcement messages. */\n  duration?: number;\n}\n\n/** Injection token that can be used to configure the default options for the LiveAnnouncer. */\nexport const LIVE_ANNOUNCER_DEFAULT_OPTIONS =\n    new InjectionToken<LiveAnnouncerDefaultOptions>('LIVE_ANNOUNCER_DEFAULT_OPTIONS');\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ContentObserver} from '@angular/cdk/observers';\nimport {DOCUMENT} from '@angular/common';\nimport {\n  Directive,\n  ElementRef,\n  Inject,\n  Injectable,\n  Input,\n  NgZone,\n  OnDestroy,\n  Optional,\n} from '@angular/core';\nimport {Subscription} from 'rxjs';\nimport {\n  AriaLivePoliteness,\n  LiveAnnouncerDefaultOptions,\n  LIVE_ANNOUNCER_ELEMENT_TOKEN,\n  LIVE_ANNOUNCER_DEFAULT_OPTIONS,\n} from './live-announcer-tokens';\n\n\n@Injectable({providedIn: 'root'})\nexport class LiveAnnouncer implements OnDestroy {\n  private _liveElement: HTMLElement;\n  private _document: Document;\n  private _previousTimeout?: number;\n\n  constructor(\n      @Optional() @Inject(LIVE_ANNOUNCER_ELEMENT_TOKEN) elementToken: any,\n      private _ngZone: NgZone,\n      @Inject(DOCUMENT) _document: any,\n      @Optional() @Inject(LIVE_ANNOUNCER_DEFAULT_OPTIONS)\n      private _defaultOptions?: LiveAnnouncerDefaultOptions) {\n\n    // We inject the live element and document as `any` because the constructor signature cannot\n    // reference browser globals (HTMLElement, Document) on non-browser environments, since having\n    // a class decorator causes TypeScript to preserve the constructor signature types.\n    this._document = _document;\n    this._liveElement = elementToken || this._createLiveElement();\n  }\n\n  /**\n   * Announces a message to screenreaders.\n   * @param message Message to be announced to the screenreader.\n   * @returns Promise that will be resolved when the message is added to the DOM.\n   */\n  announce(message: string): Promise<void>;\n\n  /**\n   * Announces a message to screenreaders.\n   * @param message Message to be announced to the screenreader.\n   * @param politeness The politeness of the announcer element.\n   * @returns Promise that will be resolved when the message is added to the DOM.\n   */\n  announce(message: string, politeness?: AriaLivePoliteness): Promise<void>;\n\n  /**\n   * Announces a message to screenreaders.\n   * @param message Message to be announced to the screenreader.\n   * @param duration Time in milliseconds after which to clear out the announcer element. Note\n   *   that this takes effect after the message has been added to the DOM, which can be up to\n   *   100ms after `announce` has been called.\n   * @returns Promise that will be resolved when the message is added to the DOM.\n   */\n  announce(message: string, duration?: number): Promise<void>;\n\n  /**\n   * Announces a message to screenreaders.\n   * @param message Message to be announced to the screenreader.\n   * @param politeness The politeness of the announcer element.\n   * @param duration Time in milliseconds after which to clear out the announcer element. Note\n   *   that this takes effect after the message has been added to the DOM, which can be up to\n   *   100ms after `announce` has been called.\n   * @returns Promise that will be resolved when the message is added to the DOM.\n   */\n  announce(message: string, politeness?: AriaLivePoliteness, duration?: number): Promise<void>;\n\n  announce(message: string, ...args: any[]): Promise<void> {\n    const defaultOptions = this._defaultOptions;\n    let politeness: AriaLivePoliteness | undefined;\n    let duration: number | undefined;\n\n    if (args.length === 1 && typeof args[0] === 'number') {\n      duration = args[0];\n    } else {\n      [politeness, duration] = args;\n    }\n\n    this.clear();\n    clearTimeout(this._previousTimeout);\n\n    if (!politeness) {\n      politeness =\n          (defaultOptions && defaultOptions.politeness) ? defaultOptions.politeness : 'polite';\n    }\n\n    if (duration == null && defaultOptions) {\n      duration = defaultOptions.duration;\n    }\n\n    // TODO: ensure changing the politeness works on all environments we support.\n    this._liveElement.setAttribute('aria-live', politeness);\n\n    // This 100ms timeout is necessary for some browser + screen-reader combinations:\n    // - Both JAWS and NVDA over IE11 will not announce anything without a non-zero timeout.\n    // - With Chrome and IE11 with NVDA or JAWS, a repeated (identical) message won't be read a\n    //   second time without clearing and then using a non-zero delay.\n    // (using JAWS 17 at time of this writing).\n    return this._ngZone.runOutsideAngular(() => {\n      return new Promise(resolve => {\n        clearTimeout(this._previousTimeout);\n        this._previousTimeout = setTimeout(() => {\n          this._liveElement.textContent = message;\n          resolve();\n\n          if (typeof duration === 'number') {\n            this._previousTimeout = setTimeout(() => this.clear(), duration);\n          }\n        }, 100);\n      });\n    });\n  }\n\n  /**\n   * Clears the current text from the announcer element. Can be used to prevent\n   * screen readers from reading the text out again while the user is going\n   * through the page landmarks.\n   */\n  clear() {\n    if (this._liveElement) {\n      this._liveElement.textContent = '';\n    }\n  }\n\n  ngOnDestroy() {\n    clearTimeout(this._previousTimeout);\n\n    if (this._liveElement && this._liveElement.parentNode) {\n      this._liveElement.parentNode.removeChild(this._liveElement);\n      this._liveElement = null!;\n    }\n  }\n\n  private _createLiveElement(): HTMLElement {\n    const elementClass = 'cdk-live-announcer-element';\n    const previousElements = this._document.getElementsByClassName(elementClass);\n    const liveEl = this._document.createElement('div');\n\n    // Remove any old containers. This can happen when coming in from a server-side-rendered page.\n    for (let i = 0; i < previousElements.length; i++) {\n      previousElements[i].parentNode!.removeChild(previousElements[i]);\n    }\n\n    liveEl.classList.add(elementClass);\n    liveEl.classList.add('cdk-visually-hidden');\n\n    liveEl.setAttribute('aria-atomic', 'true');\n    liveEl.setAttribute('aria-live', 'polite');\n\n    this._document.body.appendChild(liveEl);\n\n    return liveEl;\n  }\n\n}\n\n\n/**\n * A directive that works similarly to aria-live, but uses the LiveAnnouncer to ensure compatibility\n * with a wider range of browsers and screen readers.\n */\n@Directive({\n  selector: '[cdkAriaLive]',\n  exportAs: 'cdkAriaLive',\n})\nexport class CdkAriaLive implements OnDestroy {\n  /** The aria-live politeness level to use when announcing messages. */\n  @Input('cdkAriaLive')\n  get politeness(): AriaLivePoliteness { return this._politeness; }\n  set politeness(value: AriaLivePoliteness) {\n    this._politeness = value === 'polite' || value === 'assertive' ? value : 'off';\n    if (this._politeness === 'off') {\n      if (this._subscription) {\n        this._subscription.unsubscribe();\n        this._subscription = null;\n      }\n    } else if (!this._subscription) {\n      this._subscription = this._ngZone.runOutsideAngular(() => {\n        return this._contentObserver\n          .observe(this._elementRef)\n          .subscribe(() => {\n            // Note that we use textContent here, rather than innerText, in order to avoid a reflow.\n            const elementText = this._elementRef.nativeElement.textContent;\n\n            // The `MutationObserver` fires also for attribute\n            // changes which we don't want to announce.\n            if (elementText !== this._previousAnnouncedText) {\n              this._liveAnnouncer.announce(elementText, this._politeness);\n              this._previousAnnouncedText = elementText;\n            }\n          });\n      });\n    }\n  }\n  private _politeness: AriaLivePoliteness = 'off';\n\n  private _previousAnnouncedText?: string;\n  private _subscription: Subscription | null;\n\n  constructor(private _elementRef: ElementRef, private _liveAnnouncer: LiveAnnouncer,\n              private _contentObserver: ContentObserver, private _ngZone: NgZone) {}\n\n  ngOnDestroy() {\n    if (this._subscription) {\n      this._subscription.unsubscribe();\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * Screenreaders will often fire fake mousedown events when a focusable element\n * is activated using the keyboard. We can typically distinguish between these faked\n * mousedown events and real mousedown events using the \"buttons\" property. While\n * real mousedowns will indicate the mouse button that was pressed (e.g. \"1\" for\n * the left mouse button), faked mousedowns will usually set the property value to 0.\n */\nexport function isFakeMousedownFromScreenReader(event: MouseEvent): boolean {\n  return event.buttons === 0;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Platform, normalizePassiveListenerOptions, _getShadowRoot} from '@angular/cdk/platform';\nimport {\n  Directive,\n  ElementRef,\n  EventEmitter,\n  Inject,\n  Injectable,\n  InjectionToken,\n  NgZone,\n  OnDestroy,\n  Optional,\n  Output,\n  AfterViewInit,\n} from '@angular/core';\nimport {Observable, of as observableOf, Subject, Subscription} from 'rxjs';\nimport {coerceElement} from '@angular/cdk/coercion';\nimport {DOCUMENT} from '@angular/common';\nimport {isFakeMousedownFromScreenReader} from '../fake-mousedown';\n\n\n// This is the value used by AngularJS Material. Through trial and error (on iPhone 6S) they found\n// that a value of around 650ms seems appropriate.\nexport const TOUCH_BUFFER_MS = 650;\n\n\nexport type FocusOrigin = 'touch' | 'mouse' | 'keyboard' | 'program' | null;\n\n/**\n * Corresponds to the options that can be passed to the native `focus` event.\n * via https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/focus\n */\nexport interface FocusOptions {\n  /** Whether the browser should scroll to the element when it is focused. */\n  preventScroll?: boolean;\n}\n\n/** Detection mode used for attributing the origin of a focus event. */\nexport const enum FocusMonitorDetectionMode {\n  /**\n   * Any mousedown, keydown, or touchstart event that happened in the previous\n   * tick or the current tick will be used to assign a focus event's origin (to\n   * either mouse, keyboard, or touch). This is the default option.\n   */\n  IMMEDIATE,\n  /**\n   * A focus event's origin is always attributed to the last corresponding\n   * mousedown, keydown, or touchstart event, no matter how long ago it occured.\n   */\n  EVENTUAL\n}\n\n/** Injectable service-level options for FocusMonitor. */\nexport interface FocusMonitorOptions {\n  detectionMode?: FocusMonitorDetectionMode;\n}\n\n/** InjectionToken for FocusMonitorOptions. */\nexport const FOCUS_MONITOR_DEFAULT_OPTIONS =\n    new InjectionToken<FocusMonitorOptions>('cdk-focus-monitor-default-options');\n\ntype MonitoredElementInfo = {\n  checkChildren: boolean,\n  subject: Subject<FocusOrigin>,\n  rootNode: HTMLElement|Document\n};\n\n/**\n * Event listener options that enable capturing and also\n * mark the listener as passive if the browser supports it.\n */\nconst captureEventListenerOptions = normalizePassiveListenerOptions({\n  passive: true,\n  capture: true\n});\n\n\n/** Monitors mouse and keyboard events to determine the cause of focus events. */\n@Injectable({providedIn: 'root'})\nexport class FocusMonitor implements OnDestroy {\n  /** The focus origin that the next focus event is a result of. */\n  private _origin: FocusOrigin = null;\n\n  /** The FocusOrigin of the last focus event tracked by the FocusMonitor. */\n  private _lastFocusOrigin: FocusOrigin;\n\n  /** Whether the window has just been focused. */\n  private _windowFocused = false;\n\n  /** The target of the last touch event. */\n  private _lastTouchTarget: EventTarget | null;\n\n  /** The timeout id of the touch timeout, used to cancel timeout later. */\n  private _touchTimeoutId: number;\n\n  /** The timeout id of the window focus timeout. */\n  private _windowFocusTimeoutId: number;\n\n  /** The timeout id of the origin clearing timeout. */\n  private _originTimeoutId: number;\n\n  /** Map of elements being monitored to their info. */\n  private _elementInfo = new Map<HTMLElement, MonitoredElementInfo>();\n\n  /** The number of elements currently being monitored. */\n  private _monitoredElementCount = 0;\n\n  /**\n   * Keeps track of the root nodes to which we've currently bound a focus/blur handler,\n   * as well as the number of monitored elements that they contain. We have to treat focus/blur\n   * handlers differently from the rest of the events, because the browser won't emit events\n   * to the document when focus moves inside of a shadow root.\n   */\n  private _rootNodeFocusListenerCount = new Map<HTMLElement|Document, number>();\n\n  /**\n   * The specified detection mode, used for attributing the origin of a focus\n   * event.\n   */\n  private readonly _detectionMode: FocusMonitorDetectionMode;\n\n  /**\n   * Event listener for `keydown` events on the document.\n   * Needs to be an arrow function in order to preserve the context when it gets bound.\n   */\n  private _documentKeydownListener = () => {\n    // On keydown record the origin and clear any touch event that may be in progress.\n    this._lastTouchTarget = null;\n    this._setOriginForCurrentEventQueue('keyboard');\n  }\n\n  /**\n   * Event listener for `mousedown` events on the document.\n   * Needs to be an arrow function in order to preserve the context when it gets bound.\n   */\n  private _documentMousedownListener = (event: MouseEvent) => {\n    // On mousedown record the origin only if there is not touch\n    // target, since a mousedown can happen as a result of a touch event.\n    if (!this._lastTouchTarget) {\n      // In some cases screen readers fire fake `mousedown` events instead of `keydown`.\n      // Resolve the focus source to `keyboard` if we detect one of them.\n      const source = isFakeMousedownFromScreenReader(event) ? 'keyboard' : 'mouse';\n      this._setOriginForCurrentEventQueue(source);\n    }\n  }\n\n  /**\n   * Event listener for `touchstart` events on the document.\n   * Needs to be an arrow function in order to preserve the context when it gets bound.\n   */\n  private _documentTouchstartListener = (event: TouchEvent) => {\n    // When the touchstart event fires the focus event is not yet in the event queue. This means\n    // we can't rely on the trick used above (setting timeout of 1ms). Instead we wait 650ms to\n    // see if a focus happens.\n    if (this._touchTimeoutId != null) {\n      clearTimeout(this._touchTimeoutId);\n    }\n\n    this._lastTouchTarget = getTarget(event);\n    this._touchTimeoutId = setTimeout(() => this._lastTouchTarget = null, TOUCH_BUFFER_MS);\n  }\n\n  /**\n   * Event listener for `focus` events on the window.\n   * Needs to be an arrow function in order to preserve the context when it gets bound.\n   */\n  private _windowFocusListener = () => {\n    // Make a note of when the window regains focus, so we can\n    // restore the origin info for the focused element.\n    this._windowFocused = true;\n    this._windowFocusTimeoutId = setTimeout(() => this._windowFocused = false);\n  }\n\n  /** Used to reference correct document/window */\n  protected _document?: Document;\n\n  constructor(\n      private _ngZone: NgZone,\n      private _platform: Platform,\n      /** @breaking-change 11.0.0 make document required */\n      @Optional() @Inject(DOCUMENT) document: any|null,\n      @Optional() @Inject(FOCUS_MONITOR_DEFAULT_OPTIONS) options:\n          FocusMonitorOptions|null) {\n    this._document = document;\n    this._detectionMode = options?.detectionMode || FocusMonitorDetectionMode.IMMEDIATE;\n  }\n  /**\n   * Event listener for `focus` and 'blur' events on the document.\n   * Needs to be an arrow function in order to preserve the context when it gets bound.\n   */\n  private _rootNodeFocusAndBlurListener = (event: Event) => {\n    const target = getTarget(event);\n    const handler = event.type === 'focus' ? this._onFocus : this._onBlur;\n\n    // We need to walk up the ancestor chain in order to support `checkChildren`.\n    for (let element = target; element; element = element.parentElement) {\n      handler.call(this, event as FocusEvent, element);\n    }\n  }\n\n  /**\n   * Monitors focus on an element and applies appropriate CSS classes.\n   * @param element The element to monitor\n   * @param checkChildren Whether to count the element as focused when its children are focused.\n   * @returns An observable that emits when the focus state of the element changes.\n   *     When the element is blurred, null will be emitted.\n   */\n  monitor(element: HTMLElement, checkChildren?: boolean): Observable<FocusOrigin>;\n\n  /**\n   * Monitors focus on an element and applies appropriate CSS classes.\n   * @param element The element to monitor\n   * @param checkChildren Whether to count the element as focused when its children are focused.\n   * @returns An observable that emits when the focus state of the element changes.\n   *     When the element is blurred, null will be emitted.\n   */\n  monitor(element: ElementRef<HTMLElement>, checkChildren?: boolean): Observable<FocusOrigin>;\n\n  monitor(element: HTMLElement | ElementRef<HTMLElement>,\n          checkChildren: boolean = false): Observable<FocusOrigin> {\n    // Do nothing if we're not on the browser platform.\n    if (!this._platform.isBrowser) {\n      return observableOf(null);\n    }\n\n    const nativeElement = coerceElement(element);\n\n    // If the element is inside the shadow DOM, we need to bind our focus/blur listeners to\n    // the shadow root, rather than the `document`, because the browser won't emit focus events\n    // to the `document`, if focus is moving within the same shadow root.\n    const rootNode = (_getShadowRoot(nativeElement) as HTMLElement|null) || this._getDocument();\n    const cachedInfo = this._elementInfo.get(nativeElement);\n\n    // Check if we're already monitoring this element.\n    if (cachedInfo) {\n      if (checkChildren) {\n        // TODO(COMP-318): this can be problematic, because it'll turn all non-checkChildren\n        // observers into ones that behave as if `checkChildren` was turned on. We need a more\n        // robust solution.\n        cachedInfo.checkChildren = true;\n      }\n\n      return cachedInfo.subject;\n    }\n\n    // Create monitored element info.\n    const info: MonitoredElementInfo = {\n      checkChildren: checkChildren,\n      subject: new Subject<FocusOrigin>(),\n      rootNode\n    };\n    this._elementInfo.set(nativeElement, info);\n    this._registerGlobalListeners(info);\n\n    return info.subject;\n  }\n\n  /**\n   * Stops monitoring an element and removes all focus classes.\n   * @param element The element to stop monitoring.\n   */\n  stopMonitoring(element: HTMLElement): void;\n\n  /**\n   * Stops monitoring an element and removes all focus classes.\n   * @param element The element to stop monitoring.\n   */\n  stopMonitoring(element: ElementRef<HTMLElement>): void;\n\n  stopMonitoring(element: HTMLElement | ElementRef<HTMLElement>): void {\n    const nativeElement = coerceElement(element);\n    const elementInfo = this._elementInfo.get(nativeElement);\n\n    if (elementInfo) {\n      elementInfo.subject.complete();\n\n      this._setClasses(nativeElement);\n      this._elementInfo.delete(nativeElement);\n      this._removeGlobalListeners(elementInfo);\n    }\n  }\n\n  /**\n   * Focuses the element via the specified focus origin.\n   * @param element Element to focus.\n   * @param origin Focus origin.\n   * @param options Options that can be used to configure the focus behavior.\n   */\n  focusVia(element: HTMLElement, origin: FocusOrigin, options?: FocusOptions): void;\n\n  /**\n   * Focuses the element via the specified focus origin.\n   * @param element Element to focus.\n   * @param origin Focus origin.\n   * @param options Options that can be used to configure the focus behavior.\n   */\n  focusVia(element: ElementRef<HTMLElement>, origin: FocusOrigin, options?: FocusOptions): void;\n\n  focusVia(element: HTMLElement | ElementRef<HTMLElement>,\n          origin: FocusOrigin,\n          options?: FocusOptions): void {\n\n    const nativeElement = coerceElement(element);\n\n    this._setOriginForCurrentEventQueue(origin);\n\n    // `focus` isn't available on the server\n    if (typeof nativeElement.focus === 'function') {\n      // Cast the element to `any`, because the TS typings don't have the `options` parameter yet.\n      (nativeElement as any).focus(options);\n    }\n  }\n\n  ngOnDestroy() {\n    this._elementInfo.forEach((_info, element) => this.stopMonitoring(element));\n  }\n\n  /** Access injected document if available or fallback to global document reference */\n  private _getDocument(): Document {\n    return this._document || document;\n  }\n\n  /** Use defaultView of injected document if available or fallback to global window reference */\n  private _getWindow(): Window {\n    const doc = this._getDocument();\n    return doc.defaultView || window;\n  }\n\n  private _toggleClass(element: Element, className: string, shouldSet: boolean) {\n    if (shouldSet) {\n      element.classList.add(className);\n    } else {\n      element.classList.remove(className);\n    }\n  }\n\n  private _getFocusOrigin(event: FocusEvent): FocusOrigin {\n    // If we couldn't detect a cause for the focus event, it's due to one of three reasons:\n    // 1) The window has just regained focus, in which case we want to restore the focused state of\n    //    the element from before the window blurred.\n    // 2) It was caused by a touch event, in which case we mark the origin as 'touch'.\n    // 3) The element was programmatically focused, in which case we should mark the origin as\n    //    'program'.\n    if (this._origin) {\n      return this._origin;\n    }\n\n    if (this._windowFocused && this._lastFocusOrigin) {\n      return this._lastFocusOrigin;\n    } else if (this._wasCausedByTouch(event)) {\n      return 'touch';\n    } else {\n      return 'program';\n    }\n  }\n\n  /**\n   * Sets the focus classes on the element based on the given focus origin.\n   * @param element The element to update the classes on.\n   * @param origin The focus origin.\n   */\n  private _setClasses(element: HTMLElement, origin?: FocusOrigin): void {\n    this._toggleClass(element, 'cdk-focused', !!origin);\n    this._toggleClass(element, 'cdk-touch-focused', origin === 'touch');\n    this._toggleClass(element, 'cdk-keyboard-focused', origin === 'keyboard');\n    this._toggleClass(element, 'cdk-mouse-focused', origin === 'mouse');\n    this._toggleClass(element, 'cdk-program-focused', origin === 'program');\n  }\n\n  /**\n   * Sets the origin and schedules an async function to clear it at the end of the event queue.\n   * If the detection mode is 'eventual', the origin is never cleared.\n   * @param origin The origin to set.\n   */\n  private _setOriginForCurrentEventQueue(origin: FocusOrigin): void {\n    this._ngZone.runOutsideAngular(() => {\n      this._origin = origin;\n\n      if (this._detectionMode === FocusMonitorDetectionMode.IMMEDIATE) {\n        // Sometimes the focus origin won't be valid in Firefox because Firefox seems to focus *one*\n        // tick after the interaction event fired. To ensure the focus origin is always correct,\n        // the focus origin will be determined at the beginning of the next tick.\n        this._originTimeoutId = setTimeout(() => this._origin = null, 1);\n      }\n    });\n  }\n\n  /**\n   * Checks whether the given focus event was caused by a touchstart event.\n   * @param event The focus event to check.\n   * @returns Whether the event was caused by a touch.\n   */\n  private _wasCausedByTouch(event: FocusEvent): boolean {\n    // Note(mmalerba): This implementation is not quite perfect, there is a small edge case.\n    // Consider the following dom structure:\n    //\n    // <div #parent tabindex=\"0\" cdkFocusClasses>\n    //   <div #child (click)=\"#parent.focus()\"></div>\n    // </div>\n    //\n    // If the user touches the #child element and the #parent is programmatically focused as a\n    // result, this code will still consider it to have been caused by the touch event and will\n    // apply the cdk-touch-focused class rather than the cdk-program-focused class. This is a\n    // relatively small edge-case that can be worked around by using\n    // focusVia(parentEl, 'program') to focus the parent element.\n    //\n    // If we decide that we absolutely must handle this case correctly, we can do so by listening\n    // for the first focus event after the touchstart, and then the first blur event after that\n    // focus event. When that blur event fires we know that whatever follows is not a result of the\n    // touchstart.\n    const focusTarget = getTarget(event);\n    return this._lastTouchTarget instanceof Node && focusTarget instanceof Node &&\n        (focusTarget === this._lastTouchTarget || focusTarget.contains(this._lastTouchTarget));\n  }\n\n  /**\n   * Handles focus events on a registered element.\n   * @param event The focus event.\n   * @param element The monitored element.\n   */\n  private _onFocus(event: FocusEvent, element: HTMLElement) {\n    // NOTE(mmalerba): We currently set the classes based on the focus origin of the most recent\n    // focus event affecting the monitored element. If we want to use the origin of the first event\n    // instead we should check for the cdk-focused class here and return if the element already has\n    // it. (This only matters for elements that have includesChildren = true).\n\n    // If we are not counting child-element-focus as focused, make sure that the event target is the\n    // monitored element itself.\n    const elementInfo = this._elementInfo.get(element);\n    if (!elementInfo || (!elementInfo.checkChildren && element !== getTarget(event))) {\n      return;\n    }\n\n    const origin = this._getFocusOrigin(event);\n    this._setClasses(element, origin);\n    this._emitOrigin(elementInfo.subject, origin);\n    this._lastFocusOrigin = origin;\n  }\n\n  /**\n   * Handles blur events on a registered element.\n   * @param event The blur event.\n   * @param element The monitored element.\n   */\n  _onBlur(event: FocusEvent, element: HTMLElement) {\n    // If we are counting child-element-focus as focused, make sure that we aren't just blurring in\n    // order to focus another child of the monitored element.\n    const elementInfo = this._elementInfo.get(element);\n\n    if (!elementInfo || (elementInfo.checkChildren && event.relatedTarget instanceof Node &&\n        element.contains(event.relatedTarget))) {\n      return;\n    }\n\n    this._setClasses(element);\n    this._emitOrigin(elementInfo.subject, null);\n  }\n\n  private _emitOrigin(subject: Subject<FocusOrigin>, origin: FocusOrigin) {\n    this._ngZone.run(() => subject.next(origin));\n  }\n\n  private _registerGlobalListeners(elementInfo: MonitoredElementInfo) {\n    if (!this._platform.isBrowser) {\n      return;\n    }\n\n    const rootNode = elementInfo.rootNode;\n    const rootNodeFocusListeners = this._rootNodeFocusListenerCount.get(rootNode) || 0;\n\n    if (!rootNodeFocusListeners) {\n      this._ngZone.runOutsideAngular(() => {\n        rootNode.addEventListener('focus', this._rootNodeFocusAndBlurListener,\n          captureEventListenerOptions);\n        rootNode.addEventListener('blur', this._rootNodeFocusAndBlurListener,\n          captureEventListenerOptions);\n      });\n    }\n\n    this._rootNodeFocusListenerCount.set(rootNode, rootNodeFocusListeners + 1);\n\n    // Register global listeners when first element is monitored.\n    if (++this._monitoredElementCount === 1) {\n      // Note: we listen to events in the capture phase so we\n      // can detect them even if the user stops propagation.\n      this._ngZone.runOutsideAngular(() => {\n        const document = this._getDocument();\n        const window = this._getWindow();\n\n        document.addEventListener('keydown', this._documentKeydownListener,\n          captureEventListenerOptions);\n        document.addEventListener('mousedown', this._documentMousedownListener,\n          captureEventListenerOptions);\n        document.addEventListener('touchstart', this._documentTouchstartListener,\n          captureEventListenerOptions);\n        window.addEventListener('focus', this._windowFocusListener);\n      });\n    }\n  }\n\n  private _removeGlobalListeners(elementInfo: MonitoredElementInfo) {\n    const rootNode = elementInfo.rootNode;\n\n    if (this._rootNodeFocusListenerCount.has(rootNode)) {\n      const rootNodeFocusListeners = this._rootNodeFocusListenerCount.get(rootNode)!;\n\n      if (rootNodeFocusListeners > 1) {\n        this._rootNodeFocusListenerCount.set(rootNode, rootNodeFocusListeners - 1);\n      } else {\n        rootNode.removeEventListener('focus', this._rootNodeFocusAndBlurListener,\n          captureEventListenerOptions);\n        rootNode.removeEventListener('blur', this._rootNodeFocusAndBlurListener,\n          captureEventListenerOptions);\n        this._rootNodeFocusListenerCount.delete(rootNode);\n      }\n    }\n\n    // Unregister global listeners when last element is unmonitored.\n    if (!--this._monitoredElementCount) {\n      const document = this._getDocument();\n      const window = this._getWindow();\n\n      document.removeEventListener('keydown', this._documentKeydownListener,\n        captureEventListenerOptions);\n      document.removeEventListener('mousedown', this._documentMousedownListener,\n        captureEventListenerOptions);\n      document.removeEventListener('touchstart', this._documentTouchstartListener,\n        captureEventListenerOptions);\n      window.removeEventListener('focus', this._windowFocusListener);\n\n      // Clear timeouts for all potentially pending timeouts to prevent the leaks.\n      clearTimeout(this._windowFocusTimeoutId);\n      clearTimeout(this._touchTimeoutId);\n      clearTimeout(this._originTimeoutId);\n    }\n  }\n}\n\n/** Gets the target of an event, accounting for Shadow DOM. */\nfunction getTarget(event: Event): HTMLElement|null {\n  // If an event is bound outside the Shadow DOM, the `event.target` will\n  // point to the shadow root so we have to use `composedPath` instead.\n  return (event.composedPath ? event.composedPath()[0] : event.target) as HTMLElement | null;\n}\n\n\n/**\n * Directive that determines how a particular element was focused (via keyboard, mouse, touch, or\n * programmatically) and adds corresponding classes to the element.\n *\n * There are two variants of this directive:\n * 1) cdkMonitorElementFocus: does not consider an element to be focused if one of its children is\n *    focused.\n * 2) cdkMonitorSubtreeFocus: considers an element focused if it or any of its children are focused.\n */\n@Directive({\n  selector: '[cdkMonitorElementFocus], [cdkMonitorSubtreeFocus]',\n})\nexport class CdkMonitorFocus implements AfterViewInit, OnDestroy {\n  private _monitorSubscription: Subscription;\n  @Output() cdkFocusChange = new EventEmitter<FocusOrigin>();\n\n  constructor(private _elementRef: ElementRef<HTMLElement>, private _focusMonitor: FocusMonitor) {}\n\n  ngAfterViewInit() {\n    this._monitorSubscription = this._focusMonitor.monitor(\n      this._elementRef,\n      this._elementRef.nativeElement.hasAttribute('cdkMonitorSubtreeFocus'))\n      .subscribe(origin => this.cdkFocusChange.emit(origin));\n  }\n\n  ngOnDestroy() {\n    this._focusMonitor.stopMonitoring(this._elementRef);\n\n    if (this._monitorSubscription) {\n      this._monitorSubscription.unsubscribe();\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Platform} from '@angular/cdk/platform';\nimport {DOCUMENT} from '@angular/common';\nimport {Inject, Injectable} from '@angular/core';\n\n\n/** Set of possible high-contrast mode backgrounds. */\nexport const enum HighContrastMode {\n  NONE,\n  BLACK_ON_WHITE,\n  WHITE_ON_BLACK,\n}\n\n/** CSS class applied to the document body when in black-on-white high-contrast mode. */\nexport const BLACK_ON_WHITE_CSS_CLASS = 'cdk-high-contrast-black-on-white';\n\n/** CSS class applied to the document body when in white-on-black high-contrast mode. */\nexport const WHITE_ON_BLACK_CSS_CLASS = 'cdk-high-contrast-white-on-black';\n\n/** CSS class applied to the document body when in high-contrast mode. */\nexport const HIGH_CONTRAST_MODE_ACTIVE_CSS_CLASS = 'cdk-high-contrast-active';\n\n/**\n * Service to determine whether the browser is currently in a high-contrast-mode environment.\n *\n * Microsoft Windows supports an accessibility feature called \"High Contrast Mode\". This mode\n * changes the appearance of all applications, including web applications, to dramatically increase\n * contrast.\n *\n * IE, Edge, and Firefox currently support this mode. Chrome does not support Windows High Contrast\n * Mode. This service does not detect high-contrast mode as added by the Chrome \"High Contrast\"\n * browser extension.\n */\n@Injectable({providedIn: 'root'})\nexport class HighContrastModeDetector {\n  private _document: Document;\n\n  constructor(private _platform: Platform, @Inject(DOCUMENT) document: any) {\n    this._document = document;\n  }\n\n  /** Gets the current high-contrast-mode for the page. */\n  getHighContrastMode(): HighContrastMode {\n    if (!this._platform.isBrowser) {\n      return HighContrastMode.NONE;\n    }\n\n    // Create a test element with an arbitrary background-color that is neither black nor\n    // white; high-contrast mode will coerce the color to either black or white. Also ensure that\n    // appending the test element to the DOM does not affect layout by absolutely positioning it\n    const testElement = this._document.createElement('div');\n    testElement.style.backgroundColor = 'rgb(1,2,3)';\n    testElement.style.position = 'absolute';\n    this._document.body.appendChild(testElement);\n\n    // Get the computed style for the background color, collapsing spaces to normalize between\n    // browsers. Once we get this color, we no longer need the test element. Access the `window`\n    // via the document so we can fake it in tests. Note that we have extra null checks, because\n    // this logic will likely run during app bootstrap and throwing can break the entire app.\n    const documentWindow = this._document.defaultView || window;\n    const computedStyle = (documentWindow && documentWindow.getComputedStyle) ?\n        documentWindow.getComputedStyle(testElement) : null;\n    const computedColor =\n        (computedStyle && computedStyle.backgroundColor || '').replace(/ /g, '');\n    this._document.body.removeChild(testElement);\n\n    switch (computedColor) {\n      case 'rgb(0,0,0)': return HighContrastMode.WHITE_ON_BLACK;\n      case 'rgb(255,255,255)': return HighContrastMode.BLACK_ON_WHITE;\n    }\n    return HighContrastMode.NONE;\n  }\n\n  /** Applies CSS classes indicating high-contrast mode to document body (browser-only). */\n  _applyBodyHighContrastModeCssClasses(): void {\n    if (this._platform.isBrowser && this._document.body) {\n      const bodyClasses = this._document.body.classList;\n      // IE11 doesn't support `classList` operations with multiple arguments\n      bodyClasses.remove(HIGH_CONTRAST_MODE_ACTIVE_CSS_CLASS);\n      bodyClasses.remove(BLACK_ON_WHITE_CSS_CLASS);\n      bodyClasses.remove(WHITE_ON_BLACK_CSS_CLASS);\n\n      const mode = this.getHighContrastMode();\n      if (mode === HighContrastMode.BLACK_ON_WHITE) {\n        bodyClasses.add(HIGH_CONTRAST_MODE_ACTIVE_CSS_CLASS);\n        bodyClasses.add(BLACK_ON_WHITE_CSS_CLASS);\n      } else if (mode === HighContrastMode.WHITE_ON_BLACK) {\n        bodyClasses.add(HIGH_CONTRAST_MODE_ACTIVE_CSS_CLASS);\n        bodyClasses.add(WHITE_ON_BLACK_CSS_CLASS);\n      }\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ObserversModule} from '@angular/cdk/observers';\nimport {PlatformModule} from '@angular/cdk/platform';\nimport {NgModule} from '@angular/core';\nimport {CdkMonitorFocus} from './focus-monitor/focus-monitor';\nimport {CdkTrapFocus} from './focus-trap/focus-trap';\nimport {HighContrastModeDetector} from './high-contrast-mode/high-contrast-mode-detector';\nimport {CdkAriaLive} from './live-announcer/live-announcer';\n\n\n@NgModule({\n  imports: [PlatformModule, ObserversModule],\n  declarations: [CdkAriaLive, CdkTrapFocus, CdkMonitorFocus],\n  exports: [CdkAriaLive, CdkTrapFocus, CdkMonitorFocus],\n})\nexport class A11yModule {\n  constructor(highContrastModeDetector: HighContrastModeDetector) {\n    highContrastModeDetector._applyBodyHighContrastModeCssClasses();\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nexport * from './aria-describer/aria-describer';\nexport * from './key-manager/activedescendant-key-manager';\nexport * from './key-manager/focus-key-manager';\nexport * from './key-manager/list-key-manager';\nexport * from './focus-trap/configurable-focus-trap';\nexport * from './focus-trap/event-listener-inert-strategy';\nexport * from './focus-trap/focus-trap';\nexport * from './focus-trap/configurable-focus-trap-factory';\nexport * from './focus-trap/focus-trap-inert-strategy';\nexport * from './interactivity-checker/interactivity-checker';\nexport * from './live-announcer/live-announcer';\nexport * from './live-announcer/live-announcer-tokens';\nexport * from './focus-monitor/focus-monitor';\nexport * from './fake-mousedown';\nexport * from './a11y-module';\nexport {\n  HighContrastModeDetector,\n  HighContrastMode,\n} from './high-contrast-mode/high-contrast-mode-detector';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n\nexport {ConfigurableFocusTrapConfig as ɵangular_material_src_cdk_a11y_a11y_b} from './focus-trap/configurable-focus-trap-config';\nexport {FocusTrapManager as ɵangular_material_src_cdk_a11y_a11y_a} from './focus-trap/focus-trap-manager';","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Emits a value from the source Observable only after a particular time span\n * determined by another Observable has passed without another source emission.\n *\n * <span class=\"informal\">It's like {@link debounceTime}, but the time span of\n * emission silence is determined by a second Observable.</span>\n *\n * <img src=\"./img/debounce.png\" width=\"100%\">\n *\n * `debounce` delays values emitted by the source Observable, but drops previous\n * pending delayed emissions if a new value arrives on the source Observable.\n * This operator keeps track of the most recent value from the source\n * Observable, and spawns a duration Observable by calling the\n * `durationSelector` function. The value is emitted only when the duration\n * Observable emits a value or completes, and if no other value was emitted on\n * the source Observable since the duration Observable was spawned. If a new\n * value appears before the duration Observable emits, the previous value will\n * be dropped and will not be emitted on the output Observable.\n *\n * Like {@link debounceTime}, this is a rate-limiting operator, and also a\n * delay-like operator since output emissions do not necessarily occur at the\n * same time as they did on the source Observable.\n *\n * @example <caption>Emit the most recent click after a burst of clicks</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.debounce(() => Rx.Observable.interval(1000));\n * result.subscribe(x => console.log(x));\n *\n * @see {@link audit}\n * @see {@link debounceTime}\n * @see {@link delayWhen}\n * @see {@link throttle}\n *\n * @param {function(value: T): SubscribableOrPromise} durationSelector A function\n * that receives a value from the source Observable, for computing the timeout\n * duration for each source value, returned as an Observable or a Promise.\n * @return {Observable} An Observable that delays the emissions of the source\n * Observable by the specified duration Observable returned by\n * `durationSelector`, and may drop some values if they occur too frequently.\n * @method debounce\n * @owner Observable\n */\nfunction debounce(durationSelector) {\n    return operators_1.debounce(durationSelector)(this);\n}\nexports.debounce = debounce;\n//# sourceMappingURL=debounce.js.map","import unsupportedIterableToArray from \"./unsupportedIterableToArray\";\nexport default function _createForOfIteratorHelper(o, allowArrayLike) {\n  var it;\n\n  if (typeof Symbol === \"undefined\" || o[Symbol.iterator] == null) {\n    if (Array.isArray(o) || (it = unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === \"number\") {\n      if (it) o = it;\n      var i = 0;\n\n      var F = function F() {};\n\n      return {\n        s: F,\n        n: function n() {\n          if (i >= o.length) return {\n            done: true\n          };\n          return {\n            done: false,\n            value: o[i++]\n          };\n        },\n        e: function e(_e) {\n          throw _e;\n        },\n        f: F\n      };\n    }\n\n    throw new TypeError(\"Invalid attempt to iterate non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");\n  }\n\n  var normalCompletion = true,\n      didErr = false,\n      err;\n  return {\n    s: function s() {\n      it = o[Symbol.iterator]();\n    },\n    n: function n() {\n      var step = it.next();\n      normalCompletion = step.done;\n      return step;\n    },\n    e: function e(_e2) {\n      didErr = true;\n      err = _e2;\n    },\n    f: function f() {\n      try {\n        if (!normalCompletion && it[\"return\"] != null) it[\"return\"]();\n      } finally {\n        if (didErr) throw err;\n      }\n    }\n  };\n}","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nrxjs_1.Observable.if = rxjs_1.iif;\n//# sourceMappingURL=if.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\nfunction shareReplay(configOrBufferSize, windowTime, scheduler) {\n    if (configOrBufferSize && typeof configOrBufferSize === 'object') {\n        return operators_1.shareReplay(configOrBufferSize)(this);\n    }\n    return operators_1.shareReplay(configOrBufferSize, windowTime, scheduler)(this);\n}\nexports.shareReplay = shareReplay;\n//# sourceMappingURL=shareReplay.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar webSocket_1 = require(\"rxjs/webSocket\");\nrxjs_1.Observable.webSocket = webSocket_1.webSocket;\n//# sourceMappingURL=webSocket.js.map","import { from } from '../observable/from';\nimport { isArray } from '../util/isArray';\nimport { SimpleOuterSubscriber, SimpleInnerSubscriber, innerSubscribe } from '../innerSubscribe';\nexport function onErrorResumeNext(...nextSources) {\n    if (nextSources.length === 1 && isArray(nextSources[0])) {\n        nextSources = nextSources[0];\n    }\n    return (source) => source.lift(new OnErrorResumeNextOperator(nextSources));\n}\nexport function onErrorResumeNextStatic(...nextSources) {\n    let source = undefined;\n    if (nextSources.length === 1 && isArray(nextSources[0])) {\n        nextSources = nextSources[0];\n    }\n    source = nextSources.shift();\n    return from(source).lift(new OnErrorResumeNextOperator(nextSources));\n}\nclass OnErrorResumeNextOperator {\n    constructor(nextSources) {\n        this.nextSources = nextSources;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new OnErrorResumeNextSubscriber(subscriber, this.nextSources));\n    }\n}\nclass OnErrorResumeNextSubscriber extends SimpleOuterSubscriber {\n    constructor(destination, nextSources) {\n        super(destination);\n        this.destination = destination;\n        this.nextSources = nextSources;\n    }\n    notifyError() {\n        this.subscribeToNextSource();\n    }\n    notifyComplete() {\n        this.subscribeToNextSource();\n    }\n    _error(err) {\n        this.subscribeToNextSource();\n        this.unsubscribe();\n    }\n    _complete() {\n        this.subscribeToNextSource();\n        this.unsubscribe();\n    }\n    subscribeToNextSource() {\n        const next = this.nextSources.shift();\n        if (!!next) {\n            const innerSubscriber = new SimpleInnerSubscriber(this);\n            const destination = this.destination;\n            destination.add(innerSubscriber);\n            const innerSubscription = innerSubscribe(next, innerSubscriber);\n            if (innerSubscription !== innerSubscriber) {\n                destination.add(innerSubscription);\n            }\n        }\n        else {\n            this.destination.complete();\n        }\n    }\n}\n//# sourceMappingURL=onErrorResumeNext.js.map","import { Subscriber } from '../Subscriber';\nexport function retry(count = -1) {\n    return (source) => source.lift(new RetryOperator(count, source));\n}\nclass RetryOperator {\n    constructor(count, source) {\n        this.count = count;\n        this.source = source;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new RetrySubscriber(subscriber, this.count, this.source));\n    }\n}\nclass RetrySubscriber extends Subscriber {\n    constructor(destination, count, source) {\n        super(destination);\n        this.count = count;\n        this.source = source;\n    }\n    error(err) {\n        if (!this.isStopped) {\n            const { source, count } = this;\n            if (count === 0) {\n                return super.error(err);\n            }\n            else if (count > -1) {\n                this.count = count - 1;\n            }\n            source.subscribe(this._unsubscribeAndRecycle());\n        }\n    }\n}\n//# sourceMappingURL=retry.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Returns an Observable that emits the single item emitted by the source Observable that matches a specified\n * predicate, if that Observable emits one such item. If the source Observable emits more than one such item or no\n * such items, notify of an IllegalArgumentException or NoSuchElementException respectively.\n *\n * <img src=\"./img/single.png\" width=\"100%\">\n *\n * @throws {EmptyError} Delivers an EmptyError to the Observer's `error`\n * callback if the Observable completes before any `next` notification was sent.\n * @param {Function} predicate - A predicate function to evaluate items emitted by the source Observable.\n * @return {Observable<T>} An Observable that emits the single item emitted by the source Observable that matches\n * the predicate.\n .\n * @method single\n * @owner Observable\n */\nfunction single(predicate) {\n    return operators_1.single(predicate)(this);\n}\nexports.single = single;\n//# sourceMappingURL=single.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar bufferCount_1 = require(\"../../operator/bufferCount\");\nrxjs_1.Observable.prototype.bufferCount = bufferCount_1.bufferCount;\n//# sourceMappingURL=bufferCount.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Returns an Observable that emits all items emitted by the source Observable that are distinct by comparison from previous items.\n *\n * If a keySelector function is provided, then it will project each value from the source observable into a new value that it will\n * check for equality with previously projected values. If a keySelector function is not provided, it will use each value from the\n * source observable directly with an equality check against previous values.\n *\n * In JavaScript runtimes that support `Set`, this operator will use a `Set` to improve performance of the distinct value checking.\n *\n * In other runtimes, this operator will use a minimal implementation of `Set` that relies on an `Array` and `indexOf` under the\n * hood, so performance will degrade as more values are checked for distinction. Even in newer browsers, a long-running `distinct`\n * use might result in memory leaks. To help alleviate this in some scenarios, an optional `flushes` parameter is also provided so\n * that the internal `Set` can be \"flushed\", basically clearing it of values.\n *\n * @example <caption>A simple example with numbers</caption>\n * Observable.of(1, 1, 2, 2, 2, 1, 2, 3, 4, 3, 2, 1)\n *   .distinct()\n *   .subscribe(x => console.log(x)); // 1, 2, 3, 4\n *\n * @example <caption>An example using a keySelector function</caption>\n * interface Person {\n *    age: number,\n *    name: string\n * }\n *\n * Observable.of<Person>(\n *     { age: 4, name: 'Foo'},\n *     { age: 7, name: 'Bar'},\n *     { age: 5, name: 'Foo'})\n *     .distinct((p: Person) => p.name)\n *     .subscribe(x => console.log(x));\n *\n * // displays:\n * // { age: 4, name: 'Foo' }\n * // { age: 7, name: 'Bar' }\n *\n * @see {@link distinctUntilChanged}\n * @see {@link distinctUntilKeyChanged}\n *\n * @param {function} [keySelector] Optional function to select which value you want to check as distinct.\n * @param {Observable} [flushes] Optional Observable for flushing the internal HashSet of the operator.\n * @return {Observable} An Observable that emits items from the source Observable with distinct values.\n * @method distinct\n * @owner Observable\n */\nfunction distinct(keySelector, flushes) {\n    return operators_1.distinct(keySelector, flushes)(this);\n}\nexports.distinct = distinct;\n//# sourceMappingURL=distinct.js.map","import { Subscriber } from '../Subscriber';\nimport { noop } from '../util/noop';\nimport { isFunction } from '../util/isFunction';\nexport function tap(nextOrObserver, error, complete) {\n    return function tapOperatorFunction(source) {\n        return source.lift(new DoOperator(nextOrObserver, error, complete));\n    };\n}\nclass DoOperator {\n    constructor(nextOrObserver, error, complete) {\n        this.nextOrObserver = nextOrObserver;\n        this.error = error;\n        this.complete = complete;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new TapSubscriber(subscriber, this.nextOrObserver, this.error, this.complete));\n    }\n}\nclass TapSubscriber extends Subscriber {\n    constructor(destination, observerOrNext, error, complete) {\n        super(destination);\n        this._tapNext = noop;\n        this._tapError = noop;\n        this._tapComplete = noop;\n        this._tapError = error || noop;\n        this._tapComplete = complete || noop;\n        if (isFunction(observerOrNext)) {\n            this._context = this;\n            this._tapNext = observerOrNext;\n        }\n        else if (observerOrNext) {\n            this._context = observerOrNext;\n            this._tapNext = observerOrNext.next || noop;\n            this._tapError = observerOrNext.error || noop;\n            this._tapComplete = observerOrNext.complete || noop;\n        }\n    }\n    _next(value) {\n        try {\n            this._tapNext.call(this._context, value);\n        }\n        catch (err) {\n            this.destination.error(err);\n            return;\n        }\n        this.destination.next(value);\n    }\n    _error(err) {\n        try {\n            this._tapError.call(this._context, err);\n        }\n        catch (err) {\n            this.destination.error(err);\n            return;\n        }\n        this.destination.error(err);\n    }\n    _complete() {\n        try {\n            this._tapComplete.call(this._context);\n        }\n        catch (err) {\n            this.destination.error(err);\n            return;\n        }\n        return this.destination.complete();\n    }\n}\n//# sourceMappingURL=tap.js.map","import { SimpleOuterSubscriber, SimpleInnerSubscriber, innerSubscribe } from '../innerSubscribe';\nexport function skipUntil(notifier) {\n    return (source) => source.lift(new SkipUntilOperator(notifier));\n}\nclass SkipUntilOperator {\n    constructor(notifier) {\n        this.notifier = notifier;\n    }\n    call(destination, source) {\n        return source.subscribe(new SkipUntilSubscriber(destination, this.notifier));\n    }\n}\nclass SkipUntilSubscriber extends SimpleOuterSubscriber {\n    constructor(destination, notifier) {\n        super(destination);\n        this.hasValue = false;\n        const innerSubscriber = new SimpleInnerSubscriber(this);\n        this.add(innerSubscriber);\n        this.innerSubscription = innerSubscriber;\n        const innerSubscription = innerSubscribe(notifier, innerSubscriber);\n        if (innerSubscription !== innerSubscriber) {\n            this.add(innerSubscription);\n            this.innerSubscription = innerSubscription;\n        }\n    }\n    _next(value) {\n        if (this.hasValue) {\n            super._next(value);\n        }\n    }\n    notifyNext() {\n        this.hasValue = true;\n        if (this.innerSubscription) {\n            this.innerSubscription.unsubscribe();\n        }\n    }\n    notifyComplete() {\n    }\n}\n//# sourceMappingURL=skipUntil.js.map","function _defineProperties(target, props) {\n  for (var i = 0; i < props.length; i++) {\n    var descriptor = props[i];\n    descriptor.enumerable = descriptor.enumerable || false;\n    descriptor.configurable = true;\n    if (\"value\" in descriptor) descriptor.writable = true;\n    Object.defineProperty(target, descriptor.key, descriptor);\n  }\n}\n\nexport default function _createClass(Constructor, protoProps, staticProps) {\n  if (protoProps) _defineProperties(Constructor.prototype, protoProps);\n  if (staticProps) _defineProperties(Constructor, staticProps);\n  return Constructor;\n}","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {InjectionToken} from '@angular/core';\nimport {Observable} from 'rxjs';\nimport {CdkVirtualScrollViewport} from './virtual-scroll-viewport';\n\n\n/** The injection token used to specify the virtual scrolling strategy. */\nexport const VIRTUAL_SCROLL_STRATEGY =\n    new InjectionToken<VirtualScrollStrategy>('VIRTUAL_SCROLL_STRATEGY');\n\n\n/** A strategy that dictates which items should be rendered in the viewport. */\nexport interface VirtualScrollStrategy {\n  /** Emits when the index of the first element visible in the viewport changes. */\n  scrolledIndexChange: Observable<number>;\n\n  /**\n   * Attaches this scroll strategy to a viewport.\n   * @param viewport The viewport to attach this strategy to.\n   */\n  attach(viewport: CdkVirtualScrollViewport): void;\n\n  /** Detaches this scroll strategy from the currently attached viewport. */\n  detach(): void;\n\n  /** Called when the viewport is scrolled (debounced using requestAnimationFrame). */\n  onContentScrolled(): void;\n\n  /** Called when the length of the data changes. */\n  onDataLengthChanged(): void;\n\n  /** Called when the range of items rendered in the DOM has changed. */\n  onContentRendered(): void;\n\n  /** Called when the offset of the rendered items changed. */\n  onRenderedOffsetChanged(): void;\n\n  /**\n   * Scroll to the offset for the given index.\n   * @param index The index of the element to scroll to.\n   * @param behavior The ScrollBehavior to use when scrolling.\n   */\n  scrollToIndex(index: number, behavior: ScrollBehavior): void;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {coerceNumberProperty, NumberInput} from '@angular/cdk/coercion';\nimport {Directive, forwardRef, Input, OnChanges} from '@angular/core';\nimport {Observable, Subject} from 'rxjs';\nimport {distinctUntilChanged} from 'rxjs/operators';\nimport {VIRTUAL_SCROLL_STRATEGY, VirtualScrollStrategy} from './virtual-scroll-strategy';\nimport {CdkVirtualScrollViewport} from './virtual-scroll-viewport';\n\n\n/** Virtual scrolling strategy for lists with items of known fixed size. */\nexport class FixedSizeVirtualScrollStrategy implements VirtualScrollStrategy {\n  private _scrolledIndexChange = new Subject<number>();\n\n  /** @docs-private Implemented as part of VirtualScrollStrategy. */\n  scrolledIndexChange: Observable<number> = this._scrolledIndexChange.pipe(distinctUntilChanged());\n\n  /** The attached viewport. */\n  private _viewport: CdkVirtualScrollViewport | null = null;\n\n  /** The size of the items in the virtually scrolling list. */\n  private _itemSize: number;\n\n  /** The minimum amount of buffer rendered beyond the viewport (in pixels). */\n  private _minBufferPx: number;\n\n  /** The number of buffer items to render beyond the edge of the viewport (in pixels). */\n  private _maxBufferPx: number;\n\n  /**\n   * @param itemSize The size of the items in the virtually scrolling list.\n   * @param minBufferPx The minimum amount of buffer (in pixels) before needing to render more\n   * @param maxBufferPx The amount of buffer (in pixels) to render when rendering more.\n   */\n  constructor(itemSize: number, minBufferPx: number, maxBufferPx: number) {\n    this._itemSize = itemSize;\n    this._minBufferPx = minBufferPx;\n    this._maxBufferPx = maxBufferPx;\n  }\n\n  /**\n   * Attaches this scroll strategy to a viewport.\n   * @param viewport The viewport to attach this strategy to.\n   */\n  attach(viewport: CdkVirtualScrollViewport) {\n    this._viewport = viewport;\n    this._updateTotalContentSize();\n    this._updateRenderedRange();\n  }\n\n  /** Detaches this scroll strategy from the currently attached viewport. */\n  detach() {\n    this._scrolledIndexChange.complete();\n    this._viewport = null;\n  }\n\n  /**\n   * Update the item size and buffer size.\n   * @param itemSize The size of the items in the virtually scrolling list.\n   * @param minBufferPx The minimum amount of buffer (in pixels) before needing to render more\n   * @param maxBufferPx The amount of buffer (in pixels) to render when rendering more.\n   */\n  updateItemAndBufferSize(itemSize: number, minBufferPx: number, maxBufferPx: number) {\n    if (maxBufferPx < minBufferPx && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw Error('CDK virtual scroll: maxBufferPx must be greater than or equal to minBufferPx');\n    }\n    this._itemSize = itemSize;\n    this._minBufferPx = minBufferPx;\n    this._maxBufferPx = maxBufferPx;\n    this._updateTotalContentSize();\n    this._updateRenderedRange();\n  }\n\n  /** @docs-private Implemented as part of VirtualScrollStrategy. */\n  onContentScrolled() {\n    this._updateRenderedRange();\n  }\n\n  /** @docs-private Implemented as part of VirtualScrollStrategy. */\n  onDataLengthChanged() {\n    this._updateTotalContentSize();\n    this._updateRenderedRange();\n  }\n\n  /** @docs-private Implemented as part of VirtualScrollStrategy. */\n  onContentRendered() { /* no-op */ }\n\n  /** @docs-private Implemented as part of VirtualScrollStrategy. */\n  onRenderedOffsetChanged() { /* no-op */ }\n\n  /**\n   * Scroll to the offset for the given index.\n   * @param index The index of the element to scroll to.\n   * @param behavior The ScrollBehavior to use when scrolling.\n   */\n  scrollToIndex(index: number, behavior: ScrollBehavior): void {\n    if (this._viewport) {\n      this._viewport.scrollToOffset(index * this._itemSize, behavior);\n    }\n  }\n\n  /** Update the viewport's total content size. */\n  private _updateTotalContentSize() {\n    if (!this._viewport) {\n      return;\n    }\n\n    this._viewport.setTotalContentSize(this._viewport.getDataLength() * this._itemSize);\n  }\n\n  /** Update the viewport's rendered range. */\n  private _updateRenderedRange() {\n    if (!this._viewport) {\n      return;\n    }\n\n    const renderedRange = this._viewport.getRenderedRange();\n    const newRange = {start: renderedRange.start, end: renderedRange.end};\n    const viewportSize = this._viewport.getViewportSize();\n    const dataLength = this._viewport.getDataLength();\n    let scrollOffset = this._viewport.measureScrollOffset();\n    let firstVisibleIndex = scrollOffset / this._itemSize;\n\n    // If user scrolls to the bottom of the list and data changes to a smaller list\n    if (newRange.end > dataLength) {\n      // We have to recalculate the first visible index based on new data length and viewport size.\n      const maxVisibleItems = Math.ceil(viewportSize / this._itemSize);\n      const newVisibleIndex = Math.max(0,\n          Math.min(firstVisibleIndex, dataLength - maxVisibleItems));\n\n      // If first visible index changed we must update scroll offset to handle start/end buffers\n      // Current range must also be adjusted to cover the new position (bottom of new list).\n      if (firstVisibleIndex != newVisibleIndex) {\n        firstVisibleIndex = newVisibleIndex;\n        scrollOffset = newVisibleIndex * this._itemSize;\n        newRange.start = Math.floor(firstVisibleIndex);\n      }\n\n      newRange.end = Math.max(0, Math.min(dataLength, newRange.start + maxVisibleItems));\n    }\n\n    const startBuffer = scrollOffset - newRange.start * this._itemSize;\n    if (startBuffer < this._minBufferPx && newRange.start != 0) {\n      const expandStart = Math.ceil((this._maxBufferPx - startBuffer) / this._itemSize);\n      newRange.start = Math.max(0, newRange.start - expandStart);\n      newRange.end = Math.min(dataLength,\n          Math.ceil(firstVisibleIndex + (viewportSize + this._minBufferPx) / this._itemSize));\n    } else {\n      const endBuffer = newRange.end * this._itemSize - (scrollOffset + viewportSize);\n      if (endBuffer < this._minBufferPx && newRange.end != dataLength) {\n        const expandEnd = Math.ceil((this._maxBufferPx - endBuffer) / this._itemSize);\n        if (expandEnd > 0) {\n          newRange.end = Math.min(dataLength, newRange.end + expandEnd);\n          newRange.start = Math.max(0,\n              Math.floor(firstVisibleIndex - this._minBufferPx / this._itemSize));\n        }\n      }\n    }\n\n    this._viewport.setRenderedRange(newRange);\n    this._viewport.setRenderedContentOffset(this._itemSize * newRange.start);\n    this._scrolledIndexChange.next(Math.floor(firstVisibleIndex));\n  }\n}\n\n\n/**\n * Provider factory for `FixedSizeVirtualScrollStrategy` that simply extracts the already created\n * `FixedSizeVirtualScrollStrategy` from the given directive.\n * @param fixedSizeDir The instance of `CdkFixedSizeVirtualScroll` to extract the\n *     `FixedSizeVirtualScrollStrategy` from.\n */\nexport function _fixedSizeVirtualScrollStrategyFactory(fixedSizeDir: CdkFixedSizeVirtualScroll) {\n  return fixedSizeDir._scrollStrategy;\n}\n\n\n/** A virtual scroll strategy that supports fixed-size items. */\n@Directive({\n  selector: 'cdk-virtual-scroll-viewport[itemSize]',\n  providers: [{\n    provide: VIRTUAL_SCROLL_STRATEGY,\n    useFactory: _fixedSizeVirtualScrollStrategyFactory,\n    deps: [forwardRef(() => CdkFixedSizeVirtualScroll)],\n  }],\n})\nexport class CdkFixedSizeVirtualScroll implements OnChanges {\n  /** The size of the items in the list (in pixels). */\n  @Input()\n  get itemSize(): number { return this._itemSize; }\n  set itemSize(value: number) { this._itemSize = coerceNumberProperty(value); }\n  _itemSize = 20;\n\n  /**\n   * The minimum amount of buffer rendered beyond the viewport (in pixels).\n   * If the amount of buffer dips below this number, more items will be rendered. Defaults to 100px.\n   */\n  @Input()\n  get minBufferPx(): number { return this._minBufferPx; }\n  set minBufferPx(value: number) { this._minBufferPx = coerceNumberProperty(value); }\n  _minBufferPx = 100;\n\n  /**\n   * The number of pixels worth of buffer to render for when rendering new items. Defaults to 200px.\n   */\n  @Input()\n  get maxBufferPx(): number { return this._maxBufferPx; }\n  set maxBufferPx(value: number) { this._maxBufferPx = coerceNumberProperty(value); }\n  _maxBufferPx = 200;\n\n  /** The scroll strategy used by this directive. */\n  _scrollStrategy =\n      new FixedSizeVirtualScrollStrategy(this.itemSize, this.minBufferPx, this.maxBufferPx);\n\n  ngOnChanges() {\n    this._scrollStrategy.updateItemAndBufferSize(this.itemSize, this.minBufferPx, this.maxBufferPx);\n  }\n\n  static ngAcceptInputType_itemSize: NumberInput;\n  static ngAcceptInputType_minBufferPx: NumberInput;\n  static ngAcceptInputType_maxBufferPx: NumberInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Platform} from '@angular/cdk/platform';\nimport {ElementRef, Injectable, NgZone, OnDestroy, Optional, Inject} from '@angular/core';\nimport {fromEvent, of as observableOf, Subject, Subscription, Observable, Observer} from 'rxjs';\nimport {auditTime, filter} from 'rxjs/operators';\nimport {CdkScrollable} from './scrollable';\nimport {DOCUMENT} from '@angular/common';\n\n/** Time in ms to throttle the scrolling events by default. */\nexport const DEFAULT_SCROLL_TIME = 20;\n\n/**\n * Service contained all registered Scrollable references and emits an event when any one of the\n * Scrollable references emit a scrolled event.\n */\n@Injectable({providedIn: 'root'})\nexport class ScrollDispatcher implements OnDestroy {\n  /** Used to reference correct document/window */\n  protected _document?: Document;\n\n  constructor(private _ngZone: NgZone,\n              private _platform: Platform,\n              /** @breaking-change 11.0.0 make document required */\n              @Optional() @Inject(DOCUMENT) document?: any) {\n    this._document = document;\n  }\n\n  /** Subject for notifying that a registered scrollable reference element has been scrolled. */\n  private _scrolled = new Subject<CdkScrollable|void>();\n\n  /** Keeps track of the global `scroll` and `resize` subscriptions. */\n  _globalSubscription: Subscription | null = null;\n\n  /** Keeps track of the amount of subscriptions to `scrolled`. Used for cleaning up afterwards. */\n  private _scrolledCount = 0;\n\n  /**\n   * Map of all the scrollable references that are registered with the service and their\n   * scroll event subscriptions.\n   */\n  scrollContainers: Map<CdkScrollable, Subscription> = new Map();\n\n  /**\n   * Registers a scrollable instance with the service and listens for its scrolled events. When the\n   * scrollable is scrolled, the service emits the event to its scrolled observable.\n   * @param scrollable Scrollable instance to be registered.\n   */\n  register(scrollable: CdkScrollable): void {\n    if (!this.scrollContainers.has(scrollable)) {\n      this.scrollContainers.set(scrollable, scrollable.elementScrolled()\n          .subscribe(() => this._scrolled.next(scrollable)));\n    }\n  }\n\n  /**\n   * Deregisters a Scrollable reference and unsubscribes from its scroll event observable.\n   * @param scrollable Scrollable instance to be deregistered.\n   */\n  deregister(scrollable: CdkScrollable): void {\n    const scrollableReference = this.scrollContainers.get(scrollable);\n\n    if (scrollableReference) {\n      scrollableReference.unsubscribe();\n      this.scrollContainers.delete(scrollable);\n    }\n  }\n\n  /**\n   * Returns an observable that emits an event whenever any of the registered Scrollable\n   * references (or window, document, or body) fire a scrolled event. Can provide a time in ms\n   * to override the default \"throttle\" time.\n   *\n   * **Note:** in order to avoid hitting change detection for every scroll event,\n   * all of the events emitted from this stream will be run outside the Angular zone.\n   * If you need to update any data bindings as a result of a scroll event, you have\n   * to run the callback using `NgZone.run`.\n   */\n  scrolled(auditTimeInMs: number = DEFAULT_SCROLL_TIME): Observable<CdkScrollable|void> {\n    if (!this._platform.isBrowser) {\n      return observableOf<void>();\n    }\n\n    return new Observable((observer: Observer<CdkScrollable|void>) => {\n      if (!this._globalSubscription) {\n        this._addGlobalListener();\n      }\n\n      // In the case of a 0ms delay, use an observable without auditTime\n      // since it does add a perceptible delay in processing overhead.\n      const subscription = auditTimeInMs > 0 ?\n        this._scrolled.pipe(auditTime(auditTimeInMs)).subscribe(observer) :\n        this._scrolled.subscribe(observer);\n\n      this._scrolledCount++;\n\n      return () => {\n        subscription.unsubscribe();\n        this._scrolledCount--;\n\n        if (!this._scrolledCount) {\n          this._removeGlobalListener();\n        }\n      };\n    });\n  }\n\n  ngOnDestroy() {\n    this._removeGlobalListener();\n    this.scrollContainers.forEach((_, container) => this.deregister(container));\n    this._scrolled.complete();\n  }\n\n  /**\n   * Returns an observable that emits whenever any of the\n   * scrollable ancestors of an element are scrolled.\n   * @param elementRef Element whose ancestors to listen for.\n   * @param auditTimeInMs Time to throttle the scroll events.\n   */\n  ancestorScrolled(elementRef: ElementRef, auditTimeInMs?: number): Observable<CdkScrollable|void> {\n    const ancestors = this.getAncestorScrollContainers(elementRef);\n\n    return this.scrolled(auditTimeInMs).pipe(filter(target => {\n      return !target || ancestors.indexOf(target) > -1;\n    }));\n  }\n\n  /** Returns all registered Scrollables that contain the provided element. */\n  getAncestorScrollContainers(elementRef: ElementRef): CdkScrollable[] {\n    const scrollingContainers: CdkScrollable[] = [];\n\n    this.scrollContainers.forEach((_subscription: Subscription, scrollable: CdkScrollable) => {\n      if (this._scrollableContainsElement(scrollable, elementRef)) {\n        scrollingContainers.push(scrollable);\n      }\n    });\n\n    return scrollingContainers;\n  }\n\n  /** Access injected document if available or fallback to global document reference */\n  private _getDocument(): Document {\n    return this._document || document;\n  }\n\n  /** Use defaultView of injected document if available or fallback to global window reference */\n  private _getWindow(): Window {\n    const doc = this._getDocument();\n    return doc.defaultView || window;\n  }\n\n  /** Returns true if the element is contained within the provided Scrollable. */\n  private _scrollableContainsElement(scrollable: CdkScrollable, elementRef: ElementRef): boolean {\n    let element: HTMLElement | null = elementRef.nativeElement;\n    let scrollableElement = scrollable.getElementRef().nativeElement;\n\n    // Traverse through the element parents until we reach null, checking if any of the elements\n    // are the scrollable's element.\n    do {\n      if (element == scrollableElement) { return true; }\n    } while (element = element!.parentElement);\n\n    return false;\n  }\n\n  /** Sets up the global scroll listeners. */\n  private _addGlobalListener() {\n    this._globalSubscription = this._ngZone.runOutsideAngular(() => {\n      const window = this._getWindow();\n      return fromEvent(window.document, 'scroll').subscribe(() => this._scrolled.next());\n    });\n  }\n\n  /** Cleans up the global scroll listener. */\n  private _removeGlobalListener() {\n    if (this._globalSubscription) {\n      this._globalSubscription.unsubscribe();\n      this._globalSubscription = null;\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directionality} from '@angular/cdk/bidi';\nimport {\n  getRtlScrollAxisType,\n  RtlScrollAxisType,\n  supportsScrollBehavior\n} from '@angular/cdk/platform';\nimport {Directive, ElementRef, NgZone, OnDestroy, OnInit, Optional} from '@angular/core';\nimport {fromEvent, Observable, Subject, Observer} from 'rxjs';\nimport {takeUntil} from 'rxjs/operators';\nimport {ScrollDispatcher} from './scroll-dispatcher';\n\nexport type _Without<T> = {[P in keyof T]?: never};\nexport type _XOR<T, U> = (_Without<T> & U) | (_Without<U> & T);\nexport type _Top = {top?: number};\nexport type _Bottom = {bottom?: number};\nexport type _Left = {left?: number};\nexport type _Right = {right?: number};\nexport type _Start = {start?: number};\nexport type _End = {end?: number};\nexport type _XAxis = _XOR<_XOR<_Left, _Right>, _XOR<_Start, _End>>;\nexport type _YAxis = _XOR<_Top, _Bottom>;\n\n/**\n * An extended version of ScrollToOptions that allows expressing scroll offsets relative to the\n * top, bottom, left, right, start, or end of the viewport rather than just the top and left.\n * Please note: the top and bottom properties are mutually exclusive, as are the left, right,\n * start, and end properties.\n */\nexport type ExtendedScrollToOptions = _XAxis & _YAxis & ScrollOptions;\n\n/**\n * Sends an event when the directive's element is scrolled. Registers itself with the\n * ScrollDispatcher service to include itself as part of its collection of scrolling events that it\n * can be listened to through the service.\n */\n@Directive({\n  selector: '[cdk-scrollable], [cdkScrollable]'\n})\nexport class CdkScrollable implements OnInit, OnDestroy {\n  private _destroyed = new Subject<void>();\n\n  private _elementScrolled: Observable<Event> = new Observable((observer: Observer<Event>) =>\n      this.ngZone.runOutsideAngular(() =>\n          fromEvent(this.elementRef.nativeElement, 'scroll').pipe(takeUntil(this._destroyed))\n              .subscribe(observer)));\n\n  constructor(protected elementRef: ElementRef<HTMLElement>,\n              protected scrollDispatcher: ScrollDispatcher,\n              protected ngZone: NgZone,\n              @Optional() protected dir?: Directionality) {}\n\n  ngOnInit() {\n    this.scrollDispatcher.register(this);\n  }\n\n  ngOnDestroy() {\n    this.scrollDispatcher.deregister(this);\n    this._destroyed.next();\n    this._destroyed.complete();\n  }\n\n  /** Returns observable that emits when a scroll event is fired on the host element. */\n  elementScrolled(): Observable<Event> {\n    return this._elementScrolled;\n  }\n\n  /** Gets the ElementRef for the viewport. */\n  getElementRef(): ElementRef<HTMLElement> {\n    return this.elementRef;\n  }\n\n  /**\n   * Scrolls to the specified offsets. This is a normalized version of the browser's native scrollTo\n   * method, since browsers are not consistent about what scrollLeft means in RTL. For this method\n   * left and right always refer to the left and right side of the scrolling container irrespective\n   * of the layout direction. start and end refer to left and right in an LTR context and vice-versa\n   * in an RTL context.\n   * @param options specified the offsets to scroll to.\n   */\n  scrollTo(options: ExtendedScrollToOptions): void {\n    const el = this.elementRef.nativeElement;\n    const isRtl = this.dir && this.dir.value == 'rtl';\n\n    // Rewrite start & end offsets as right or left offsets.\n    if (options.left == null) {\n      options.left = isRtl ? options.end : options.start;\n    }\n\n    if (options.right == null) {\n      options.right = isRtl ? options.start : options.end;\n    }\n\n    // Rewrite the bottom offset as a top offset.\n    if (options.bottom != null) {\n      (options as _Without<_Bottom> & _Top).top =\n          el.scrollHeight - el.clientHeight - options.bottom;\n    }\n\n    // Rewrite the right offset as a left offset.\n    if (isRtl && getRtlScrollAxisType() != RtlScrollAxisType.NORMAL) {\n      if (options.left != null) {\n        (options as _Without<_Left> & _Right).right =\n            el.scrollWidth - el.clientWidth - options.left;\n      }\n\n      if (getRtlScrollAxisType() == RtlScrollAxisType.INVERTED) {\n        options.left = options.right;\n      } else if (getRtlScrollAxisType() == RtlScrollAxisType.NEGATED) {\n        options.left = options.right ? -options.right : options.right;\n      }\n    } else {\n      if (options.right != null) {\n        (options as _Without<_Right> & _Left).left =\n            el.scrollWidth - el.clientWidth - options.right;\n      }\n    }\n\n    this._applyScrollToOptions(options);\n  }\n\n  private _applyScrollToOptions(options: ScrollToOptions): void {\n    const el = this.elementRef.nativeElement;\n\n    if (supportsScrollBehavior()) {\n      el.scrollTo(options);\n    } else {\n      if (options.top != null) {\n        el.scrollTop = options.top;\n      }\n      if (options.left != null) {\n        el.scrollLeft = options.left;\n      }\n    }\n  }\n\n  /**\n   * Measures the scroll offset relative to the specified edge of the viewport. This method can be\n   * used instead of directly checking scrollLeft or scrollTop, since browsers are not consistent\n   * about what scrollLeft means in RTL. The values returned by this method are normalized such that\n   * left and right always refer to the left and right side of the scrolling container irrespective\n   * of the layout direction. start and end refer to left and right in an LTR context and vice-versa\n   * in an RTL context.\n   * @param from The edge to measure from.\n   */\n  measureScrollOffset(from: 'top' | 'left' | 'right' | 'bottom' | 'start' | 'end'): number {\n    const LEFT = 'left';\n    const RIGHT = 'right';\n    const el = this.elementRef.nativeElement;\n    if (from == 'top') {\n      return el.scrollTop;\n    }\n    if (from == 'bottom') {\n      return el.scrollHeight - el.clientHeight - el.scrollTop;\n    }\n\n    // Rewrite start & end as left or right offsets.\n    const isRtl = this.dir && this.dir.value == 'rtl';\n    if (from == 'start') {\n      from = isRtl ? RIGHT : LEFT;\n    } else if (from == 'end') {\n      from = isRtl ? LEFT : RIGHT;\n    }\n\n    if (isRtl && getRtlScrollAxisType() == RtlScrollAxisType.INVERTED) {\n      // For INVERTED, scrollLeft is (scrollWidth - clientWidth) when scrolled all the way left and\n      // 0 when scrolled all the way right.\n      if (from == LEFT) {\n        return el.scrollWidth - el.clientWidth - el.scrollLeft;\n      } else {\n        return el.scrollLeft;\n      }\n    } else if (isRtl && getRtlScrollAxisType() == RtlScrollAxisType.NEGATED) {\n      // For NEGATED, scrollLeft is -(scrollWidth - clientWidth) when scrolled all the way left and\n      // 0 when scrolled all the way right.\n      if (from == LEFT) {\n        return el.scrollLeft + el.scrollWidth - el.clientWidth;\n      } else {\n        return -el.scrollLeft;\n      }\n    } else {\n      // For NORMAL, as well as non-RTL contexts, scrollLeft is 0 when scrolled all the way left and\n      // (scrollWidth - clientWidth) when scrolled all the way right.\n      if (from == LEFT) {\n        return el.scrollLeft;\n      } else {\n        return el.scrollWidth - el.clientWidth - el.scrollLeft;\n      }\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Platform} from '@angular/cdk/platform';\nimport {Injectable, NgZone, OnDestroy, Optional, Inject} from '@angular/core';\nimport {Observable, Subject} from 'rxjs';\nimport {auditTime} from 'rxjs/operators';\nimport {DOCUMENT} from '@angular/common';\n\n/** Time in ms to throttle the resize events by default. */\nexport const DEFAULT_RESIZE_TIME = 20;\n\n/** Object that holds the scroll position of the viewport in each direction. */\nexport interface ViewportScrollPosition {\n  top: number;\n  left: number;\n}\n\n/**\n * Simple utility for getting the bounds of the browser viewport.\n * @docs-private\n */\n@Injectable({providedIn: 'root'})\nexport class ViewportRuler implements OnDestroy {\n  /** Cached viewport dimensions. */\n  private _viewportSize: {width: number; height: number};\n\n  /** Stream of viewport change events. */\n  private _change = new Subject<Event>();\n\n  /** Event listener that will be used to handle the viewport change events. */\n  private _changeListener = (event: Event) => {\n    this._change.next(event);\n  }\n\n  /** Used to reference correct document/window */\n  protected _document?: Document;\n\n  constructor(private _platform: Platform,\n              ngZone: NgZone,\n              /** @breaking-change 11.0.0 make document required */\n              @Optional() @Inject(DOCUMENT) document?: any) {\n    this._document = document;\n\n    ngZone.runOutsideAngular(() => {\n      if (_platform.isBrowser) {\n        const window = this._getWindow();\n\n        // Note that bind the events ourselves, rather than going through something like RxJS's\n        // `fromEvent` so that we can ensure that they're bound outside of the NgZone.\n        window.addEventListener('resize', this._changeListener);\n        window.addEventListener('orientationchange', this._changeListener);\n      }\n\n      // We don't need to keep track of the subscription,\n      // because we complete the `change` stream on destroy.\n      this.change().subscribe(() => this._updateViewportSize());\n    });\n  }\n\n  ngOnDestroy() {\n    if (this._platform.isBrowser) {\n      const window = this._getWindow();\n      window.removeEventListener('resize', this._changeListener);\n      window.removeEventListener('orientationchange', this._changeListener);\n    }\n\n    this._change.complete();\n  }\n\n  /** Returns the viewport's width and height. */\n  getViewportSize(): Readonly<{width: number, height: number}> {\n    if (!this._viewportSize) {\n      this._updateViewportSize();\n    }\n\n    const output = {width: this._viewportSize.width, height: this._viewportSize.height};\n\n    // If we're not on a browser, don't cache the size since it'll be mocked out anyway.\n    if (!this._platform.isBrowser) {\n      this._viewportSize = null!;\n    }\n\n    return output;\n  }\n\n  /** Gets a ClientRect for the viewport's bounds. */\n  getViewportRect(): ClientRect {\n    // Use the document element's bounding rect rather than the window scroll properties\n    // (e.g. pageYOffset, scrollY) due to in issue in Chrome and IE where window scroll\n    // properties and client coordinates (boundingClientRect, clientX/Y, etc.) are in different\n    // conceptual viewports. Under most circumstances these viewports are equivalent, but they\n    // can disagree when the page is pinch-zoomed (on devices that support touch).\n    // See https://bugs.chromium.org/p/chromium/issues/detail?id=489206#c4\n    // We use the documentElement instead of the body because, by default (without a css reset)\n    // browsers typically give the document body an 8px margin, which is not included in\n    // getBoundingClientRect().\n    const scrollPosition = this.getViewportScrollPosition();\n    const {width, height} = this.getViewportSize();\n\n    return {\n      top: scrollPosition.top,\n      left: scrollPosition.left,\n      bottom: scrollPosition.top + height,\n      right: scrollPosition.left + width,\n      height,\n      width,\n    };\n  }\n\n  /** Gets the (top, left) scroll position of the viewport. */\n  getViewportScrollPosition(): ViewportScrollPosition {\n    // While we can get a reference to the fake document\n    // during SSR, it doesn't have getBoundingClientRect.\n    if (!this._platform.isBrowser) {\n      return {top: 0, left: 0};\n    }\n\n    // The top-left-corner of the viewport is determined by the scroll position of the document\n    // body, normally just (scrollLeft, scrollTop). However, Chrome and Firefox disagree about\n    // whether `document.body` or `document.documentElement` is the scrolled element, so reading\n    // `scrollTop` and `scrollLeft` is inconsistent. However, using the bounding rect of\n    // `document.documentElement` works consistently, where the `top` and `left` values will\n    // equal negative the scroll position.\n    const document = this._getDocument();\n    const window = this._getWindow();\n    const documentElement = document.documentElement!;\n    const documentRect = documentElement.getBoundingClientRect();\n\n    const top = -documentRect.top || document.body.scrollTop || window.scrollY ||\n                 documentElement.scrollTop || 0;\n\n    const left = -documentRect.left || document.body.scrollLeft || window.scrollX ||\n                  documentElement.scrollLeft || 0;\n\n    return {top, left};\n  }\n\n  /**\n   * Returns a stream that emits whenever the size of the viewport changes.\n   * @param throttleTime Time in milliseconds to throttle the stream.\n   */\n  change(throttleTime: number = DEFAULT_RESIZE_TIME): Observable<Event> {\n    return throttleTime > 0 ? this._change.pipe(auditTime(throttleTime)) : this._change;\n  }\n\n  /** Access injected document if available or fallback to global document reference */\n  private _getDocument(): Document {\n    return this._document || document;\n  }\n\n  /** Use defaultView of injected document if available or fallback to global window reference */\n  private _getWindow(): Window {\n    const doc = this._getDocument();\n    return doc.defaultView || window;\n  }\n\n  /** Updates the cached viewport size. */\n  private _updateViewportSize() {\n    const window = this._getWindow();\n    this._viewportSize = this._platform.isBrowser ?\n        {width: window.innerWidth, height: window.innerHeight} :\n        {width: 0, height: 0};\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directionality} from '@angular/cdk/bidi';\nimport {ListRange} from '@angular/cdk/collections';\nimport {\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ElementRef,\n  Inject,\n  Input,\n  NgZone,\n  OnDestroy,\n  OnInit,\n  Optional,\n  Output,\n  ViewChild,\n  ViewEncapsulation,\n} from '@angular/core';\nimport {\n  animationFrameScheduler,\n  asapScheduler,\n  Observable,\n  Subject,\n  Observer,\n  Subscription,\n} from 'rxjs';\nimport {auditTime, startWith, takeUntil} from 'rxjs/operators';\nimport {ScrollDispatcher} from './scroll-dispatcher';\nimport {CdkScrollable, ExtendedScrollToOptions} from './scrollable';\nimport {VIRTUAL_SCROLL_STRATEGY, VirtualScrollStrategy} from './virtual-scroll-strategy';\nimport {ViewportRuler} from './viewport-ruler';\nimport {CdkVirtualScrollRepeater} from './virtual-scroll-repeater';\n\n/** Checks if the given ranges are equal. */\nfunction rangesEqual(r1: ListRange, r2: ListRange): boolean {\n  return r1.start == r2.start && r1.end == r2.end;\n}\n\n/**\n * Scheduler to be used for scroll events. Needs to fall back to\n * something that doesn't rely on requestAnimationFrame on environments\n * that don't support it (e.g. server-side rendering).\n */\nconst SCROLL_SCHEDULER =\n    typeof requestAnimationFrame !== 'undefined' ? animationFrameScheduler : asapScheduler;\n\n\n/** A viewport that virtualizes its scrolling with the help of `CdkVirtualForOf`. */\n@Component({\n  selector: 'cdk-virtual-scroll-viewport',\n  templateUrl: 'virtual-scroll-viewport.html',\n  styleUrls: ['virtual-scroll-viewport.css'],\n  host: {\n    'class': 'cdk-virtual-scroll-viewport',\n    '[class.cdk-virtual-scroll-orientation-horizontal]': 'orientation === \"horizontal\"',\n    '[class.cdk-virtual-scroll-orientation-vertical]': 'orientation !== \"horizontal\"',\n  },\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  providers: [{\n    provide: CdkScrollable,\n    useExisting: CdkVirtualScrollViewport,\n  }]\n})\nexport class CdkVirtualScrollViewport extends CdkScrollable implements OnInit, OnDestroy {\n  /** Emits when the viewport is detached from a CdkVirtualForOf. */\n  private _detachedSubject = new Subject<void>();\n\n  /** Emits when the rendered range changes. */\n  private _renderedRangeSubject = new Subject<ListRange>();\n\n  /** The direction the viewport scrolls. */\n  @Input()\n  get orientation() {\n    return this._orientation;\n  }\n  set orientation(orientation: 'horizontal' | 'vertical') {\n    if (this._orientation !== orientation) {\n      this._orientation = orientation;\n      this._calculateSpacerSize();\n    }\n  }\n  private _orientation: 'horizontal' | 'vertical' = 'vertical';\n\n  // Note: we don't use the typical EventEmitter here because we need to subscribe to the scroll\n  // strategy lazily (i.e. only if the user is actually listening to the events). We do this because\n  // depending on how the strategy calculates the scrolled index, it may come at a cost to\n  // performance.\n  /** Emits when the index of the first element visible in the viewport changes. */\n  @Output() scrolledIndexChange: Observable<number> =\n      new Observable((observer: Observer<number>) =>\n        this._scrollStrategy.scrolledIndexChange.subscribe(index =>\n            Promise.resolve().then(() => this.ngZone.run(() => observer.next(index)))));\n\n  /** The element that wraps the rendered content. */\n  @ViewChild('contentWrapper', {static: true}) _contentWrapper: ElementRef<HTMLElement>;\n\n  /** A stream that emits whenever the rendered range changes. */\n  renderedRangeStream: Observable<ListRange> = this._renderedRangeSubject;\n\n  /**\n   * The total size of all content (in pixels), including content that is not currently rendered.\n   */\n  private _totalContentSize = 0;\n\n  /** A string representing the `style.width` property value to be used for the spacer element. */\n  _totalContentWidth = '';\n\n  /** A string representing the `style.height` property value to be used for the spacer element. */\n  _totalContentHeight = '';\n\n  /**\n   * The CSS transform applied to the rendered subset of items so that they appear within the bounds\n   * of the visible viewport.\n   */\n  private _renderedContentTransform: string;\n\n  /** The currently rendered range of indices. */\n  private _renderedRange: ListRange = {start: 0, end: 0};\n\n  /** The length of the data bound to this viewport (in number of items). */\n  private _dataLength = 0;\n\n  /** The size of the viewport (in pixels). */\n  private _viewportSize = 0;\n\n  /** the currently attached CdkVirtualScrollRepeater. */\n  private _forOf: CdkVirtualScrollRepeater<any> | null;\n\n  /** The last rendered content offset that was set. */\n  private _renderedContentOffset = 0;\n\n  /**\n   * Whether the last rendered content offset was to the end of the content (and therefore needs to\n   * be rewritten as an offset to the start of the content).\n   */\n  private _renderedContentOffsetNeedsRewrite = false;\n\n  /** Whether there is a pending change detection cycle. */\n  private _isChangeDetectionPending = false;\n\n  /** A list of functions to run after the next change detection cycle. */\n  private _runAfterChangeDetection: Function[] = [];\n\n  /** Subscription to changes in the viewport size. */\n  private _viewportChanges = Subscription.EMPTY;\n\n  constructor(public elementRef: ElementRef<HTMLElement>,\n              private _changeDetectorRef: ChangeDetectorRef,\n              ngZone: NgZone,\n              @Optional() @Inject(VIRTUAL_SCROLL_STRATEGY)\n                  private _scrollStrategy: VirtualScrollStrategy,\n              @Optional() dir: Directionality,\n              scrollDispatcher: ScrollDispatcher,\n              /**\n               * @deprecated `viewportRuler` parameter to become required.\n               * @breaking-change 11.0.0\n               */\n              viewportRuler?: ViewportRuler) {\n    super(elementRef, scrollDispatcher, ngZone, dir);\n\n    if (!_scrollStrategy && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw Error('Error: cdk-virtual-scroll-viewport requires the \"itemSize\" property to be set.');\n    }\n\n    // @breaking-change 11.0.0 Remove null check for `viewportRuler`.\n    if (viewportRuler) {\n      this._viewportChanges = viewportRuler.change().subscribe(() => {\n        this.checkViewportSize();\n      });\n    }\n  }\n\n  ngOnInit() {\n    super.ngOnInit();\n\n    // It's still too early to measure the viewport at this point. Deferring with a promise allows\n    // the Viewport to be rendered with the correct size before we measure. We run this outside the\n    // zone to avoid causing more change detection cycles. We handle the change detection loop\n    // ourselves instead.\n    this.ngZone.runOutsideAngular(() => Promise.resolve().then(() => {\n      this._measureViewportSize();\n      this._scrollStrategy.attach(this);\n\n      this.elementScrolled()\n          .pipe(\n              // Start off with a fake scroll event so we properly detect our initial position.\n              startWith(null!),\n              // Collect multiple events into one until the next animation frame. This way if\n              // there are multiple scroll events in the same frame we only need to recheck\n              // our layout once.\n              auditTime(0, SCROLL_SCHEDULER))\n          .subscribe(() => this._scrollStrategy.onContentScrolled());\n\n      this._markChangeDetectionNeeded();\n    }));\n  }\n\n  ngOnDestroy() {\n    this.detach();\n    this._scrollStrategy.detach();\n\n    // Complete all subjects\n    this._renderedRangeSubject.complete();\n    this._detachedSubject.complete();\n    this._viewportChanges.unsubscribe();\n\n    super.ngOnDestroy();\n  }\n\n  /** Attaches a `CdkVirtualScrollRepeater` to this viewport. */\n  attach(forOf: CdkVirtualScrollRepeater<any>) {\n    if (this._forOf && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw Error('CdkVirtualScrollViewport is already attached.');\n    }\n\n    // Subscribe to the data stream of the CdkVirtualForOf to keep track of when the data length\n    // changes. Run outside the zone to avoid triggering change detection, since we're managing the\n    // change detection loop ourselves.\n    this.ngZone.runOutsideAngular(() => {\n      this._forOf = forOf;\n      this._forOf.dataStream.pipe(takeUntil(this._detachedSubject)).subscribe(data => {\n        const newLength = data.length;\n        if (newLength !== this._dataLength) {\n          this._dataLength = newLength;\n          this._scrollStrategy.onDataLengthChanged();\n        }\n        this._doChangeDetection();\n      });\n    });\n  }\n\n  /** Detaches the current `CdkVirtualForOf`. */\n  detach() {\n    this._forOf = null;\n    this._detachedSubject.next();\n  }\n\n  /** Gets the length of the data bound to this viewport (in number of items). */\n  getDataLength(): number {\n    return this._dataLength;\n  }\n\n  /** Gets the size of the viewport (in pixels). */\n  getViewportSize(): number {\n    return this._viewportSize;\n  }\n\n  // TODO(mmalerba): This is technically out of sync with what's really rendered until a render\n  // cycle happens. I'm being careful to only call it after the render cycle is complete and before\n  // setting it to something else, but its error prone and should probably be split into\n  // `pendingRange` and `renderedRange`, the latter reflecting whats actually in the DOM.\n\n  /** Get the current rendered range of items. */\n  getRenderedRange(): ListRange {\n    return this._renderedRange;\n  }\n\n  /**\n   * Sets the total size of all content (in pixels), including content that is not currently\n   * rendered.\n   */\n  setTotalContentSize(size: number) {\n    if (this._totalContentSize !== size) {\n      this._totalContentSize = size;\n      this._calculateSpacerSize();\n      this._markChangeDetectionNeeded();\n    }\n  }\n\n  /** Sets the currently rendered range of indices. */\n  setRenderedRange(range: ListRange) {\n    if (!rangesEqual(this._renderedRange, range)) {\n      this._renderedRangeSubject.next(this._renderedRange = range);\n      this._markChangeDetectionNeeded(() => this._scrollStrategy.onContentRendered());\n    }\n  }\n\n  /**\n   * Gets the offset from the start of the viewport to the start of the rendered data (in pixels).\n   */\n  getOffsetToRenderedContentStart(): number | null {\n    return this._renderedContentOffsetNeedsRewrite ? null : this._renderedContentOffset;\n  }\n\n  /**\n   * Sets the offset from the start of the viewport to either the start or end of the rendered data\n   * (in pixels).\n   */\n  setRenderedContentOffset(offset: number, to: 'to-start' | 'to-end' = 'to-start') {\n    // For a horizontal viewport in a right-to-left language we need to translate along the x-axis\n    // in the negative direction.\n    const isRtl = this.dir && this.dir.value == 'rtl';\n    const isHorizontal = this.orientation == 'horizontal';\n    const axis = isHorizontal ? 'X' : 'Y';\n    const axisDirection = isHorizontal && isRtl ? -1 : 1;\n    let transform = `translate${axis}(${Number(axisDirection * offset)}px)`;\n    this._renderedContentOffset = offset;\n    if (to === 'to-end') {\n      transform += ` translate${axis}(-100%)`;\n      // The viewport should rewrite this as a `to-start` offset on the next render cycle. Otherwise\n      // elements will appear to expand in the wrong direction (e.g. `mat-expansion-panel` would\n      // expand upward).\n      this._renderedContentOffsetNeedsRewrite = true;\n    }\n    if (this._renderedContentTransform != transform) {\n      // We know this value is safe because we parse `offset` with `Number()` before passing it\n      // into the string.\n      this._renderedContentTransform = transform;\n      this._markChangeDetectionNeeded(() => {\n        if (this._renderedContentOffsetNeedsRewrite) {\n          this._renderedContentOffset -= this.measureRenderedContentSize();\n          this._renderedContentOffsetNeedsRewrite = false;\n          this.setRenderedContentOffset(this._renderedContentOffset);\n        } else {\n          this._scrollStrategy.onRenderedOffsetChanged();\n        }\n      });\n    }\n  }\n\n  /**\n   * Scrolls to the given offset from the start of the viewport. Please note that this is not always\n   * the same as setting `scrollTop` or `scrollLeft`. In a horizontal viewport with right-to-left\n   * direction, this would be the equivalent of setting a fictional `scrollRight` property.\n   * @param offset The offset to scroll to.\n   * @param behavior The ScrollBehavior to use when scrolling. Default is behavior is `auto`.\n   */\n  scrollToOffset(offset: number, behavior: ScrollBehavior = 'auto') {\n    const options: ExtendedScrollToOptions = {behavior};\n    if (this.orientation === 'horizontal') {\n      options.start = offset;\n    } else {\n      options.top = offset;\n    }\n    this.scrollTo(options);\n  }\n\n  /**\n   * Scrolls to the offset for the given index.\n   * @param index The index of the element to scroll to.\n   * @param behavior The ScrollBehavior to use when scrolling. Default is behavior is `auto`.\n   */\n  scrollToIndex(index: number,  behavior: ScrollBehavior = 'auto') {\n    this._scrollStrategy.scrollToIndex(index, behavior);\n  }\n\n  /**\n   * Gets the current scroll offset from the start of the viewport (in pixels).\n   * @param from The edge to measure the offset from. Defaults to 'top' in vertical mode and 'start'\n   *     in horizontal mode.\n   */\n  measureScrollOffset(from?: 'top' | 'left' | 'right' | 'bottom' | 'start' | 'end'): number {\n    return from ?\n      super.measureScrollOffset(from) :\n      super.measureScrollOffset(this.orientation === 'horizontal' ? 'start' : 'top');\n  }\n\n  /** Measure the combined size of all of the rendered items. */\n  measureRenderedContentSize(): number {\n    const contentEl = this._contentWrapper.nativeElement;\n    return this.orientation === 'horizontal' ? contentEl.offsetWidth : contentEl.offsetHeight;\n  }\n\n  /**\n   * Measure the total combined size of the given range. Throws if the range includes items that are\n   * not rendered.\n   */\n  measureRangeSize(range: ListRange): number {\n    if (!this._forOf) {\n      return 0;\n    }\n    return this._forOf.measureRangeSize(range, this.orientation);\n  }\n\n  /** Update the viewport dimensions and re-render. */\n  checkViewportSize() {\n    // TODO: Cleanup later when add logic for handling content resize\n    this._measureViewportSize();\n    this._scrollStrategy.onDataLengthChanged();\n  }\n\n  /** Measure the viewport size. */\n  private _measureViewportSize() {\n    const viewportEl = this.elementRef.nativeElement;\n    this._viewportSize = this.orientation === 'horizontal' ?\n        viewportEl.clientWidth : viewportEl.clientHeight;\n  }\n\n  /** Queue up change detection to run. */\n  private _markChangeDetectionNeeded(runAfter?: Function) {\n    if (runAfter) {\n      this._runAfterChangeDetection.push(runAfter);\n    }\n\n    // Use a Promise to batch together calls to `_doChangeDetection`. This way if we set a bunch of\n    // properties sequentially we only have to run `_doChangeDetection` once at the end.\n    if (!this._isChangeDetectionPending) {\n      this._isChangeDetectionPending = true;\n      this.ngZone.runOutsideAngular(() => Promise.resolve().then(() => {\n        this._doChangeDetection();\n      }));\n    }\n  }\n\n  /** Run change detection. */\n  private _doChangeDetection() {\n    this._isChangeDetectionPending = false;\n\n    // Apply the content transform. The transform can't be set via an Angular binding because\n    // bypassSecurityTrustStyle is banned in Google. However the value is safe, it's composed of\n    // string literals, a variable that can only be 'X' or 'Y', and user input that is run through\n    // the `Number` function first to coerce it to a numeric value.\n    this._contentWrapper.nativeElement.style.transform = this._renderedContentTransform;\n    // Apply changes to Angular bindings. Note: We must call `markForCheck` to run change detection\n    // from the root, since the repeated items are content projected in. Calling `detectChanges`\n    // instead does not properly check the projected content.\n    this.ngZone.run(() => this._changeDetectorRef.markForCheck());\n\n    const runAfterChangeDetection = this._runAfterChangeDetection;\n    this._runAfterChangeDetection = [];\n    for (const fn of runAfterChangeDetection) {\n      fn();\n    }\n  }\n\n  /** Calculates the `style.width` and `style.height` for the spacer element. */\n  private _calculateSpacerSize() {\n    this._totalContentHeight =\n        this.orientation === 'horizontal' ? '' : `${this._totalContentSize}px`;\n    this._totalContentWidth =\n        this.orientation === 'horizontal' ? `${this._totalContentSize}px` : '';\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  ArrayDataSource,\n  CollectionViewer,\n  DataSource,\n  ListRange,\n  isDataSource,\n  _RecycleViewRepeaterStrategy,\n  _VIEW_REPEATER_STRATEGY,\n  _ViewRepeaterItemInsertArgs,\n} from '@angular/cdk/collections';\nimport {\n  Directive,\n  DoCheck,\n  EmbeddedViewRef,\n  Inject,\n  Input,\n  IterableChangeRecord,\n  IterableChanges,\n  IterableDiffer,\n  IterableDiffers,\n  NgIterable,\n  NgZone,\n  OnDestroy,\n  SkipSelf,\n  TemplateRef,\n  TrackByFunction,\n  ViewContainerRef,\n} from '@angular/core';\nimport {coerceNumberProperty, NumberInput} from '@angular/cdk/coercion';\nimport {Observable, Subject, of as observableOf, isObservable} from 'rxjs';\nimport {pairwise, shareReplay, startWith, switchMap, takeUntil} from 'rxjs/operators';\nimport {CdkVirtualScrollRepeater} from './virtual-scroll-repeater';\nimport {CdkVirtualScrollViewport} from './virtual-scroll-viewport';\n\n\n/** The context for an item rendered by `CdkVirtualForOf` */\nexport type CdkVirtualForOfContext<T> = {\n  /** The item value. */\n  $implicit: T;\n  /** The DataSource, Observable, or NgIterable that was passed to *cdkVirtualFor. */\n  cdkVirtualForOf: DataSource<T> | Observable<T[]> | NgIterable<T>;\n  /** The index of the item in the DataSource. */\n  index: number;\n  /** The number of items in the DataSource. */\n  count: number;\n  /** Whether this is the first item in the DataSource. */\n  first: boolean;\n  /** Whether this is the last item in the DataSource. */\n  last: boolean;\n  /** Whether the index is even. */\n  even: boolean;\n  /** Whether the index is odd. */\n  odd: boolean;\n};\n\n\n/** Helper to extract the offset of a DOM Node in a certain direction. */\nfunction getOffset(orientation: 'horizontal' | 'vertical', direction: 'start' | 'end', node: Node) {\n  const el = node as Element;\n  if (!el.getBoundingClientRect) {\n    return 0;\n  }\n  const rect = el.getBoundingClientRect();\n\n  if (orientation === 'horizontal') {\n    return direction === 'start' ? rect.left : rect.right;\n  }\n\n  return direction === 'start' ? rect.top : rect.bottom;\n}\n\n/**\n * A directive similar to `ngForOf` to be used for rendering data inside a virtual scrolling\n * container.\n */\n@Directive({\n  selector: '[cdkVirtualFor][cdkVirtualForOf]',\n  providers: [\n    {provide: _VIEW_REPEATER_STRATEGY, useClass: _RecycleViewRepeaterStrategy},\n  ]\n})\nexport class CdkVirtualForOf<T> implements\n    CdkVirtualScrollRepeater<T>, CollectionViewer, DoCheck, OnDestroy {\n  /** Emits when the rendered view of the data changes. */\n  viewChange = new Subject<ListRange>();\n\n  /** Subject that emits when a new DataSource instance is given. */\n  private _dataSourceChanges = new Subject<DataSource<T>>();\n\n  /** The DataSource to display. */\n  @Input()\n  get cdkVirtualForOf(): DataSource<T> | Observable<T[]> | NgIterable<T> | null | undefined {\n    return this._cdkVirtualForOf;\n  }\n  set cdkVirtualForOf(value: DataSource<T> | Observable<T[]> | NgIterable<T> | null | undefined) {\n    this._cdkVirtualForOf = value;\n    if (isDataSource(value)) {\n      this._dataSourceChanges.next(value);\n    } else {\n      // Slice the value if its an NgIterable to ensure we're working with an array.\n      this._dataSourceChanges.next(new ArrayDataSource<T>(\n          isObservable(value) ? value : Array.prototype.slice.call(value || [])));\n    }\n  }\n\n  _cdkVirtualForOf: DataSource<T> | Observable<T[]> | NgIterable<T> | null | undefined;\n\n  /**\n   * The `TrackByFunction` to use for tracking changes. The `TrackByFunction` takes the index and\n   * the item and produces a value to be used as the item's identity when tracking changes.\n   */\n  @Input()\n  get cdkVirtualForTrackBy(): TrackByFunction<T> | undefined {\n    return this._cdkVirtualForTrackBy;\n  }\n  set cdkVirtualForTrackBy(fn: TrackByFunction<T> | undefined) {\n    this._needsUpdate = true;\n    this._cdkVirtualForTrackBy = fn ?\n        (index, item) => fn(index + (this._renderedRange ? this._renderedRange.start : 0), item) :\n        undefined;\n  }\n  private _cdkVirtualForTrackBy: TrackByFunction<T> | undefined;\n\n  /** The template used to stamp out new elements. */\n  @Input()\n  set cdkVirtualForTemplate(value: TemplateRef<CdkVirtualForOfContext<T>>) {\n    if (value) {\n      this._needsUpdate = true;\n      this._template = value;\n    }\n  }\n\n  /**\n   * The size of the cache used to store templates that are not being used for re-use later.\n   * Setting the cache size to `0` will disable caching. Defaults to 20 templates.\n   */\n  @Input()\n  get cdkVirtualForTemplateCacheSize() {\n    return this._viewRepeater.viewCacheSize;\n  }\n  set cdkVirtualForTemplateCacheSize(size: number) {\n    this._viewRepeater.viewCacheSize = coerceNumberProperty(size);\n  }\n\n  /** Emits whenever the data in the current DataSource changes. */\n  dataStream: Observable<T[] | ReadonlyArray<T>> = this._dataSourceChanges\n  .pipe(\n      // Start off with null `DataSource`.\n      startWith(null!),\n      // Bundle up the previous and current data sources so we can work with both.\n      pairwise(),\n      // Use `_changeDataSource` to disconnect from the previous data source and connect to the\n      // new one, passing back a stream of data changes which we run through `switchMap` to give\n      // us a data stream that emits the latest data from whatever the current `DataSource` is.\n      switchMap(([prev, cur]) => this._changeDataSource(prev, cur)),\n      // Replay the last emitted data when someone subscribes.\n      shareReplay(1));\n\n  /** The differ used to calculate changes to the data. */\n  private _differ: IterableDiffer<T> | null = null;\n\n  /** The most recent data emitted from the DataSource. */\n  private _data: T[] | ReadonlyArray<T>;\n\n  /** The currently rendered items. */\n  private _renderedItems: T[];\n\n  /** The currently rendered range of indices. */\n  private _renderedRange: ListRange;\n\n  /** Whether the rendered data should be updated during the next ngDoCheck cycle. */\n  private _needsUpdate = false;\n\n  private _destroyed = new Subject<void>();\n\n  constructor(\n      /** The view container to add items to. */\n      private _viewContainerRef: ViewContainerRef,\n      /** The template to use when stamping out new items. */\n      private _template: TemplateRef<CdkVirtualForOfContext<T>>,\n      /** The set of available differs. */\n      private _differs: IterableDiffers,\n      /** The strategy used to render items in the virtual scroll viewport. */\n      @Inject(_VIEW_REPEATER_STRATEGY)\n      private _viewRepeater: _RecycleViewRepeaterStrategy<T, T, CdkVirtualForOfContext<T>>,\n      /** The virtual scrolling viewport that these items are being rendered in. */\n      @SkipSelf() private _viewport: CdkVirtualScrollViewport,\n      ngZone: NgZone) {\n    this.dataStream.subscribe(data => {\n      this._data = data;\n      this._onRenderedDataChange();\n    });\n    this._viewport.renderedRangeStream.pipe(takeUntil(this._destroyed)).subscribe(range => {\n      this._renderedRange = range;\n      ngZone.run(() => this.viewChange.next(this._renderedRange));\n      this._onRenderedDataChange();\n    });\n    this._viewport.attach(this);\n  }\n\n  /**\n   * Measures the combined size (width for horizontal orientation, height for vertical) of all items\n   * in the specified range. Throws an error if the range includes items that are not currently\n   * rendered.\n   */\n  measureRangeSize(range: ListRange, orientation: 'horizontal' | 'vertical'): number {\n    if (range.start >= range.end) {\n      return 0;\n    }\n    if ((range.start < this._renderedRange.start || range.end > this._renderedRange.end) &&\n      (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw Error(`Error: attempted to measure an item that isn't rendered.`);\n    }\n\n    // The index into the list of rendered views for the first item in the range.\n    const renderedStartIndex = range.start - this._renderedRange.start;\n    // The length of the range we're measuring.\n    const rangeLen = range.end - range.start;\n\n    // Loop over all the views, find the first and land node and compute the size by subtracting\n    // the top of the first node from the bottom of the last one.\n    let firstNode: HTMLElement | undefined;\n    let lastNode: HTMLElement | undefined;\n\n    // Find the first node by starting from the beginning and going forwards.\n    for (let i = 0; i < rangeLen; i++) {\n      const view = this._viewContainerRef.get(i + renderedStartIndex) as\n          EmbeddedViewRef<CdkVirtualForOfContext<T>> | null;\n      if (view && view.rootNodes.length) {\n        firstNode = lastNode = view.rootNodes[0];\n        break;\n      }\n    }\n\n    // Find the last node by starting from the end and going backwards.\n    for (let i = rangeLen - 1; i > -1; i--) {\n      const view = this._viewContainerRef.get(i + renderedStartIndex) as\n          EmbeddedViewRef<CdkVirtualForOfContext<T>> | null;\n      if (view && view.rootNodes.length) {\n        lastNode = view.rootNodes[view.rootNodes.length - 1];\n        break;\n      }\n    }\n\n    return firstNode && lastNode ?\n        getOffset(orientation, 'end', lastNode) - getOffset(orientation, 'start', firstNode) : 0;\n  }\n\n  ngDoCheck() {\n    if (this._differ && this._needsUpdate) {\n      // TODO(mmalerba): We should differentiate needs update due to scrolling and a new portion of\n      // this list being rendered (can use simpler algorithm) vs needs update due to data actually\n      // changing (need to do this diff).\n      const changes = this._differ.diff(this._renderedItems);\n      if (!changes) {\n        this._updateContext();\n      } else {\n        this._applyChanges(changes);\n      }\n      this._needsUpdate = false;\n    }\n  }\n\n  ngOnDestroy() {\n    this._viewport.detach();\n\n    this._dataSourceChanges.next(undefined!);\n    this._dataSourceChanges.complete();\n    this.viewChange.complete();\n\n    this._destroyed.next();\n    this._destroyed.complete();\n    this._viewRepeater.detach();\n  }\n\n  /** React to scroll state changes in the viewport. */\n  private _onRenderedDataChange() {\n    if (!this._renderedRange) {\n      return;\n    }\n    this._renderedItems = this._data.slice(this._renderedRange.start, this._renderedRange.end);\n    if (!this._differ) {\n      this._differ = this._differs.find(this._renderedItems).create(this.cdkVirtualForTrackBy);\n    }\n    this._needsUpdate = true;\n  }\n\n  /** Swap out one `DataSource` for another. */\n  private _changeDataSource(oldDs: DataSource<T> | null, newDs: DataSource<T> | null):\n      Observable<T[] | ReadonlyArray<T>> {\n\n    if (oldDs) {\n      oldDs.disconnect(this);\n    }\n\n    this._needsUpdate = true;\n    return newDs ? newDs.connect(this) : observableOf();\n  }\n\n  /** Update the `CdkVirtualForOfContext` for all views. */\n  private _updateContext() {\n    const count = this._data.length;\n    let i = this._viewContainerRef.length;\n    while (i--) {\n      let view = this._viewContainerRef.get(i) as EmbeddedViewRef<CdkVirtualForOfContext<T>>;\n      view.context.index = this._renderedRange.start + i;\n      view.context.count = count;\n      this._updateComputedContextProperties(view.context);\n      view.detectChanges();\n    }\n  }\n\n  /** Apply changes to the DOM. */\n  private _applyChanges(changes: IterableChanges<T>) {\n    this._viewRepeater.applyChanges(\n        changes,\n        this._viewContainerRef,\n        (record: IterableChangeRecord<T>,\n         adjustedPreviousIndex: number | null,\n         currentIndex: number | null) => this._getEmbeddedViewArgs(record, currentIndex!),\n        (record) => record.item);\n\n    // Update $implicit for any items that had an identity change.\n    changes.forEachIdentityChange((record: IterableChangeRecord<T>) => {\n      const view = this._viewContainerRef.get(record.currentIndex!) as\n          EmbeddedViewRef<CdkVirtualForOfContext<T>>;\n      view.context.$implicit = record.item;\n    });\n\n    // Update the context variables on all items.\n    const count = this._data.length;\n    let i = this._viewContainerRef.length;\n    while (i--) {\n      const view = this._viewContainerRef.get(i) as EmbeddedViewRef<CdkVirtualForOfContext<T>>;\n      view.context.index = this._renderedRange.start + i;\n      view.context.count = count;\n      this._updateComputedContextProperties(view.context);\n    }\n  }\n\n  /** Update the computed properties on the `CdkVirtualForOfContext`. */\n  private _updateComputedContextProperties(context: CdkVirtualForOfContext<any>) {\n    context.first = context.index === 0;\n    context.last = context.index === context.count - 1;\n    context.even = context.index % 2 === 0;\n    context.odd = !context.even;\n  }\n\n  private _getEmbeddedViewArgs(record: IterableChangeRecord<T>, index: number):\n      _ViewRepeaterItemInsertArgs<CdkVirtualForOfContext<T>> {\n    // Note that it's important that we insert the item directly at the proper index,\n    // rather than inserting it and the moving it in place, because if there's a directive\n    // on the same node that injects the `ViewContainerRef`, Angular will insert another\n    // comment node which can throw off the move when it's being repeated for all items.\n    return {\n      templateRef: this._template,\n      context: {\n        $implicit: record.item,\n        // It's guaranteed that the iterable is not \"undefined\" or \"null\" because we only\n        // generate views for elements if the \"cdkVirtualForOf\" iterable has elements.\n        cdkVirtualForOf: this._cdkVirtualForOf!,\n        index: -1,\n        count: -1,\n        first: false,\n        last: false,\n        odd: false,\n        even: false\n      },\n      index,\n    };\n  }\n\n  static ngAcceptInputType_cdkVirtualForTemplateCacheSize: NumberInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {BidiModule} from '@angular/cdk/bidi';\nimport {PlatformModule} from '@angular/cdk/platform';\nimport {NgModule} from '@angular/core';\nimport {CdkFixedSizeVirtualScroll} from './fixed-size-virtual-scroll';\nimport {CdkScrollable} from './scrollable';\nimport {CdkVirtualForOf} from './virtual-for-of';\nimport {CdkVirtualScrollViewport} from './virtual-scroll-viewport';\n\n@NgModule({\n  exports: [CdkScrollable],\n  declarations: [CdkScrollable]\n})\nexport class CdkScrollableModule {}\n\n/**\n * @docs-primary-export\n */\n@NgModule({\n  imports: [\n    BidiModule,\n    PlatformModule,\n    CdkScrollableModule\n  ],\n  exports: [\n    BidiModule,\n    CdkScrollableModule,\n    CdkFixedSizeVirtualScroll,\n    CdkVirtualForOf,\n    CdkVirtualScrollViewport,\n  ],\n  declarations: [\n    CdkFixedSizeVirtualScroll,\n    CdkVirtualForOf,\n    CdkVirtualScrollViewport,\n  ],\n})\nexport class ScrollingModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Observable} from 'rxjs';\nimport {ListRange} from '@angular/cdk/collections';\n\n/**\n * An item to be repeated by the VirtualScrollViewport\n */\nexport interface CdkVirtualScrollRepeater<T> {\n  dataStream: Observable<T[] | ReadonlyArray<T>>;\n  measureRangeSize(range: ListRange, orientation: 'horizontal' | 'vertical'): number;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './fixed-size-virtual-scroll';\nexport * from './scroll-dispatcher';\nexport * from './scrollable';\nexport * from './scrolling-module';\nexport * from './viewport-ruler';\nexport * from './virtual-for-of';\nexport * from './virtual-scroll-strategy';\nexport * from './virtual-scroll-viewport';\nexport * from './virtual-scroll-repeater';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","export { config } from '../internal/config';\nexport { InnerSubscriber } from '../internal/InnerSubscriber';\nexport { OuterSubscriber } from '../internal/OuterSubscriber';\nexport { Scheduler } from '../internal/Scheduler';\nexport { AnonymousSubject } from '../internal/Subject';\nexport { SubjectSubscription } from '../internal/SubjectSubscription';\nexport { Subscriber } from '../internal/Subscriber';\nexport { fromPromise } from '../internal/observable/fromPromise';\nexport { fromIterable } from '../internal/observable/fromIterable';\nexport { ajax } from '../internal/observable/dom/ajax';\nexport { webSocket } from '../internal/observable/dom/webSocket';\nexport { ajaxGet, ajaxPost, ajaxDelete, ajaxPut, ajaxPatch, ajaxGetJSON, AjaxObservable, AjaxSubscriber, AjaxResponse, AjaxError, AjaxTimeoutError } from '../internal/observable/dom/AjaxObservable';\nexport { WebSocketSubject } from '../internal/observable/dom/WebSocketSubject';\nexport { CombineLatestOperator } from '../internal/observable/combineLatest';\nexport { dispatch } from '../internal/observable/range';\nexport { SubscribeOnObservable } from '../internal/observable/SubscribeOnObservable';\nexport { Timestamp } from '../internal/operators/timestamp';\nexport { TimeInterval } from '../internal/operators/timeInterval';\nexport { GroupedObservable } from '../internal/operators/groupBy';\nexport { defaultThrottleConfig } from '../internal/operators/throttle';\nexport { rxSubscriber } from '../internal/symbol/rxSubscriber';\nexport { iterator } from '../internal/symbol/iterator';\nexport { observable } from '../internal/symbol/observable';\nexport { ArgumentOutOfRangeError } from '../internal/util/ArgumentOutOfRangeError';\nexport { EmptyError } from '../internal/util/EmptyError';\nexport { Immediate } from '../internal/util/Immediate';\nexport { ObjectUnsubscribedError } from '../internal/util/ObjectUnsubscribedError';\nexport { TimeoutError } from '../internal/util/TimeoutError';\nexport { UnsubscriptionError } from '../internal/util/UnsubscriptionError';\nexport { applyMixins } from '../internal/util/applyMixins';\nexport { errorObject } from '../internal/util/errorObject';\nexport { hostReportError } from '../internal/util/hostReportError';\nexport { identity } from '../internal/util/identity';\nexport { isArray } from '../internal/util/isArray';\nexport { isArrayLike } from '../internal/util/isArrayLike';\nexport { isDate } from '../internal/util/isDate';\nexport { isFunction } from '../internal/util/isFunction';\nexport { isIterable } from '../internal/util/isIterable';\nexport { isNumeric } from '../internal/util/isNumeric';\nexport { isObject } from '../internal/util/isObject';\nexport { isInteropObservable as isObservable } from '../internal/util/isInteropObservable';\nexport { isPromise } from '../internal/util/isPromise';\nexport { isScheduler } from '../internal/util/isScheduler';\nexport { noop } from '../internal/util/noop';\nexport { not } from '../internal/util/not';\nexport { pipe } from '../internal/util/pipe';\nexport { root } from '../internal/util/root';\nexport { subscribeTo } from '../internal/util/subscribeTo';\nexport { subscribeToArray } from '../internal/util/subscribeToArray';\nexport { subscribeToIterable } from '../internal/util/subscribeToIterable';\nexport { subscribeToObservable } from '../internal/util/subscribeToObservable';\nexport { subscribeToPromise } from '../internal/util/subscribeToPromise';\nexport { subscribeToResult } from '../internal/util/subscribeToResult';\nexport { toSubscriber } from '../internal/util/toSubscriber';\nexport { tryCatch } from '../internal/util/tryCatch';\n//# sourceMappingURL=index.js.map","import { multicast } from './multicast';\nimport { refCount } from './refCount';\nimport { Subject } from '../Subject';\nfunction shareSubjectFactory() {\n    return new Subject();\n}\nexport function share() {\n    return (source) => refCount()(multicast(shareSubjectFactory)(source));\n}\n//# sourceMappingURL=share.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar mergeMap_1 = require(\"../../operator/mergeMap\");\nrxjs_1.Observable.prototype.mergeMap = mergeMap_1.mergeMap;\nrxjs_1.Observable.prototype.flatMap = mergeMap_1.mergeMap;\n//# sourceMappingURL=mergeMap.js.map","import { map } from './map';\nexport function pluck(...properties) {\n    const length = properties.length;\n    if (length === 0) {\n        throw new Error('list of properties cannot be empty.');\n    }\n    return (source) => map(plucker(properties, length))(source);\n}\nfunction plucker(props, length) {\n    const mapper = (x) => {\n        let currentProp = x;\n        for (let i = 0; i < length; i++) {\n            const p = currentProp != null ? currentProp[props[i]] : undefined;\n            if (p !== void 0) {\n                currentProp = p;\n            }\n            else {\n                return undefined;\n            }\n        }\n        return currentProp;\n    };\n    return mapper;\n}\n//# sourceMappingURL=pluck.js.map","function _arrayWithHoles(arr) {\n  if (Array.isArray(arr)) return arr;\n}\n\nmodule.exports = _arrayWithHoles;","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar ignoreElements_1 = require(\"../../operator/ignoreElements\");\nrxjs_1.Observable.prototype.ignoreElements = ignoreElements_1.ignoreElements;\n//# sourceMappingURL=ignoreElements.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, ElementRef, Inject, InjectionToken, NgZone, Optional} from '@angular/core';\nimport {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';\n\n\n/**\n * Interface for a a MatInkBar positioner method, defining the positioning and width of the ink\n * bar in a set of tabs.\n */\nexport interface _MatInkBarPositioner {\n  (element: HTMLElement): { left: string, width: string };\n}\n\n/** Injection token for the MatInkBar's Positioner. */\nexport const _MAT_INK_BAR_POSITIONER =\n  new InjectionToken<_MatInkBarPositioner>('MatInkBarPositioner', {\n    providedIn: 'root',\n    factory: _MAT_INK_BAR_POSITIONER_FACTORY\n  });\n\n/**\n * The default positioner function for the MatInkBar.\n * @docs-private\n */\nexport function _MAT_INK_BAR_POSITIONER_FACTORY(): _MatInkBarPositioner {\n  const method = (element: HTMLElement) => ({\n    left: element ? (element.offsetLeft || 0) + 'px' : '0',\n    width: element ? (element.offsetWidth || 0) + 'px' : '0',\n  });\n\n  return method;\n}\n\n/**\n * The ink-bar is used to display and animate the line underneath the current active tab label.\n * @docs-private\n */\n@Directive({\n  selector: 'mat-ink-bar',\n  host: {\n    'class': 'mat-ink-bar',\n    '[class._mat-animation-noopable]': `_animationMode === 'NoopAnimations'`,\n  },\n})\nexport class MatInkBar {\n  constructor(\n    private _elementRef: ElementRef<HTMLElement>,\n    private _ngZone: NgZone,\n    @Inject(_MAT_INK_BAR_POSITIONER) private _inkBarPositioner: _MatInkBarPositioner,\n    @Optional() @Inject(ANIMATION_MODULE_TYPE) public _animationMode?: string) { }\n\n  /**\n   * Calculates the styles from the provided element in order to align the ink-bar to that element.\n   * Shows the ink bar if previously set as hidden.\n   * @param element\n   */\n  alignToElement(element: HTMLElement) {\n    this.show();\n\n    if (typeof requestAnimationFrame !== 'undefined') {\n      this._ngZone.runOutsideAngular(() => {\n        requestAnimationFrame(() => this._setStyles(element));\n      });\n    } else {\n      this._setStyles(element);\n    }\n  }\n\n  /** Shows the ink bar. */\n  show(): void {\n    this._elementRef.nativeElement.style.visibility = 'visible';\n  }\n\n  /** Hides the ink bar. */\n  hide(): void {\n    this._elementRef.nativeElement.style.visibility = 'hidden';\n  }\n\n  /**\n   * Sets the proper styles to the ink bar element.\n   * @param element\n   */\n  private _setStyles(element: HTMLElement) {\n    const positions = this._inkBarPositioner(element);\n    const inkBar: HTMLElement = this._elementRef.nativeElement;\n\n    inkBar.style.left = positions.left;\n    inkBar.style.width = positions.width;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, InjectionToken, TemplateRef} from '@angular/core';\n\n/**\n * Injection token that can be used to reference instances of `MatTabContent`. It serves as\n * alternative token to the actual `MatTabContent` class which could cause unnecessary\n * retention of the class and its directive metadata.\n */\nexport const MAT_TAB_CONTENT = new InjectionToken<MatTabContent>('MatTabContent');\n\n/** Decorates the `ng-template` tags and reads out the template from it. */\n@Directive({\n  selector: '[matTabContent]',\n  providers: [{provide: MAT_TAB_CONTENT, useExisting: MatTabContent}],\n})\nexport class MatTabContent {\n  constructor(public template: TemplateRef<any>) { }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, InjectionToken} from '@angular/core';\nimport {CdkPortal} from '@angular/cdk/portal';\n\n/**\n * Injection token that can be used to reference instances of `MatTabLabel`. It serves as\n * alternative token to the actual `MatTabLabel` class which could cause unnecessary\n * retention of the class and its directive metadata.\n */\nexport const MAT_TAB_LABEL = new InjectionToken<MatTabLabel>('MatTabLabel');\n\n/** Used to flag tab labels for use with the portal directive */\n@Directive({\n  selector: '[mat-tab-label], [matTabLabel]',\n  providers: [{provide: MAT_TAB_LABEL, useExisting: MatTabLabel}],\n})\nexport class MatTabLabel extends CdkPortal {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {BooleanInput} from '@angular/cdk/coercion';\nimport {TemplatePortal} from '@angular/cdk/portal';\nimport {\n  ChangeDetectionStrategy,\n  Component,\n  ContentChild,\n  Input,\n  OnChanges,\n  OnDestroy,\n  OnInit,\n  SimpleChanges,\n  TemplateRef,\n  ViewChild,\n  ViewContainerRef,\n  ViewEncapsulation,\n  InjectionToken,\n  Inject,\n  Optional,\n} from '@angular/core';\nimport {CanDisable, CanDisableCtor, mixinDisabled} from '@angular/material/core';\nimport {Subject} from 'rxjs';\nimport {MAT_TAB_CONTENT} from './tab-content';\nimport {MAT_TAB_LABEL, MatTabLabel} from './tab-label';\n\n\n// Boilerplate for applying mixins to MatTab.\n/** @docs-private */\nclass MatTabBase {}\nconst _MatTabMixinBase: CanDisableCtor & typeof MatTabBase =\n    mixinDisabled(MatTabBase);\n\n/**\n * Used to provide a tab group to a tab without causing a circular dependency.\n * @docs-private\n */\nexport const MAT_TAB_GROUP = new InjectionToken<any>('MAT_TAB_GROUP');\n\n@Component({\n  selector: 'mat-tab',\n  templateUrl: 'tab.html',\n  inputs: ['disabled'],\n  // tslint:disable-next-line:validate-decorators\n  changeDetection: ChangeDetectionStrategy.Default,\n  encapsulation: ViewEncapsulation.None,\n  exportAs: 'matTab',\n})\nexport class MatTab extends _MatTabMixinBase implements OnInit, CanDisable, OnChanges, OnDestroy {\n  /** Content for the tab label given by `<ng-template mat-tab-label>`. */\n  @ContentChild(MAT_TAB_LABEL)\n  get templateLabel(): MatTabLabel { return this._templateLabel; }\n  set templateLabel(value: MatTabLabel) { this._setTemplateLabelInput(value); }\n  protected _templateLabel: MatTabLabel;\n\n  /**\n   * Template provided in the tab content that will be used if present, used to enable lazy-loading\n   */\n  @ContentChild(MAT_TAB_CONTENT, {read: TemplateRef, static: true})\n  _explicitContent: TemplateRef<any>;\n\n  /** Template inside the MatTab view that contains an `<ng-content>`. */\n  @ViewChild(TemplateRef, {static: true}) _implicitContent: TemplateRef<any>;\n\n  /** Plain text label for the tab, used when there is no template label. */\n  @Input('label') textLabel: string = '';\n\n  /** Aria label for the tab. */\n  @Input('aria-label') ariaLabel: string;\n\n  /**\n   * Reference to the element that the tab is labelled by.\n   * Will be cleared if `aria-label` is set at the same time.\n   */\n  @Input('aria-labelledby') ariaLabelledby: string;\n\n  /** Portal that will be the hosted content of the tab */\n  private _contentPortal: TemplatePortal | null = null;\n\n  /** @docs-private */\n  get content(): TemplatePortal | null {\n    return this._contentPortal;\n  }\n\n  /** Emits whenever the internal state of the tab changes. */\n  readonly _stateChanges = new Subject<void>();\n\n  /**\n   * The relatively indexed position where 0 represents the center, negative is left, and positive\n   * represents the right.\n   */\n  position: number | null = null;\n\n  /**\n   * The initial relatively index origin of the tab if it was created and selected after there\n   * was already a selected tab. Provides context of what position the tab should originate from.\n   */\n  origin: number | null = null;\n\n  /**\n   * Whether the tab is currently active.\n   */\n  isActive = false;\n\n  constructor(\n    private _viewContainerRef: ViewContainerRef,\n    /**\n     * @deprecated `_closestTabGroup` parameter to become required.\n     * @breaking-change 10.0.0\n     */\n    @Optional() @Inject(MAT_TAB_GROUP) public _closestTabGroup?: any) {\n    super();\n  }\n\n  ngOnChanges(changes: SimpleChanges): void {\n    if (changes.hasOwnProperty('textLabel') || changes.hasOwnProperty('disabled')) {\n      this._stateChanges.next();\n    }\n  }\n\n  ngOnDestroy(): void {\n    this._stateChanges.complete();\n  }\n\n  ngOnInit(): void {\n    this._contentPortal = new TemplatePortal(\n        this._explicitContent || this._implicitContent, this._viewContainerRef);\n  }\n\n  /**\n   * This has been extracted to a util because of TS 4 and VE.\n   * View Engine doesn't support property rename inheritance.\n   * TS 4.0 doesn't allow properties to override accessors or vice-versa.\n   * @docs-private\n   */\n  protected _setTemplateLabelInput(value: MatTabLabel) {\n    // Only update the templateLabel via query if there is actually\n    // a MatTabLabel found. This works around an issue where a user may have\n    // manually set `templateLabel` during creation mode, which would then get clobbered\n    // by `undefined` when this query resolves.\n    if (value) {\n      this._templateLabel = value;\n    }\n  }\n\n  static ngAcceptInputType_disabled: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {\n  animate,\n  state,\n  style,\n  transition,\n  trigger,\n  AnimationTriggerMetadata,\n} from '@angular/animations';\n\n/**\n * Animations used by the Material tabs.\n * @docs-private\n */\nexport const matTabsAnimations: {\n  readonly translateTab: AnimationTriggerMetadata;\n} = {\n  /** Animation translates a tab along the X axis. */\n  translateTab: trigger('translateTab', [\n    // Note: transitions to `none` instead of 0, because some browsers might blur the content.\n    state('center, void, left-origin-center, right-origin-center', style({transform: 'none'})),\n\n    // If the tab is either on the left or right, we additionally add a `min-height` of 1px\n    // in order to ensure that the element has a height before its state changes. This is\n    // necessary because Chrome does seem to skip the transition in RTL mode if the element does\n    // not have a static height and is not rendered. See related issue: #9465\n    state('left', style({transform: 'translate3d(-100%, 0, 0)', minHeight: '1px'})),\n    state('right', style({transform: 'translate3d(100%, 0, 0)', minHeight: '1px'})),\n\n    transition('* => left, * => right, left => center, right => center',\n        animate('{{animationDuration}} cubic-bezier(0.35, 0, 0.25, 1)')),\n    transition('void => left-origin-center', [\n      style({transform: 'translate3d(-100%, 0, 0)'}),\n      animate('{{animationDuration}} cubic-bezier(0.35, 0, 0.25, 1)')\n    ]),\n    transition('void => right-origin-center', [\n      style({transform: 'translate3d(100%, 0, 0)'}),\n      animate('{{animationDuration}} cubic-bezier(0.35, 0, 0.25, 1)')\n    ])\n  ])\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  Component,\n  ChangeDetectorRef,\n  Input,\n  Inject,\n  Output,\n  EventEmitter,\n  OnDestroy,\n  OnInit,\n  ElementRef,\n  Directive,\n  Optional,\n  ViewEncapsulation,\n  ChangeDetectionStrategy,\n  ComponentFactoryResolver,\n  ViewContainerRef,\n  forwardRef,\n  ViewChild,\n} from '@angular/core';\nimport {AnimationEvent} from '@angular/animations';\nimport {TemplatePortal, CdkPortalOutlet, PortalHostDirective} from '@angular/cdk/portal';\nimport {Directionality, Direction} from '@angular/cdk/bidi';\nimport {DOCUMENT} from '@angular/common';\nimport {Subscription, Subject} from 'rxjs';\nimport {matTabsAnimations} from './tabs-animations';\nimport {startWith, distinctUntilChanged} from 'rxjs/operators';\n\n/**\n * These position states are used internally as animation states for the tab body. Setting the\n * position state to left, right, or center will transition the tab body from its current\n * position to its respective state. If there is not current position (void, in the case of a new\n * tab body), then there will be no transition animation to its state.\n *\n * In the case of a new tab body that should immediately be centered with an animating transition,\n * then left-origin-center or right-origin-center can be used, which will use left or right as its\n * psuedo-prior state.\n */\nexport type MatTabBodyPositionState =\n    'left' | 'center' | 'right' | 'left-origin-center' | 'right-origin-center';\n\n/**\n * The origin state is an internally used state that is set on a new tab body indicating if it\n * began to the left or right of the prior selected index. For example, if the selected index was\n * set to 1, and a new tab is created and selected at index 2, then the tab body would have an\n * origin of right because its index was greater than the prior selected index.\n */\nexport type MatTabBodyOriginState = 'left' | 'right';\n\n/**\n * The portal host directive for the contents of the tab.\n * @docs-private\n */\n@Directive({\n  selector: '[matTabBodyHost]'\n})\nexport class MatTabBodyPortal extends CdkPortalOutlet implements OnInit, OnDestroy {\n  /** Subscription to events for when the tab body begins centering. */\n  private _centeringSub = Subscription.EMPTY;\n  /** Subscription to events for when the tab body finishes leaving from center position. */\n  private _leavingSub = Subscription.EMPTY;\n\n  constructor(\n    componentFactoryResolver: ComponentFactoryResolver,\n    viewContainerRef: ViewContainerRef,\n    @Inject(forwardRef(() => MatTabBody)) private _host: MatTabBody,\n    /**\n     * @deprecated `_document` parameter to be made required.\n     * @breaking-change 9.0.0\n     */\n    @Inject(DOCUMENT) _document?: any) {\n    super(componentFactoryResolver, viewContainerRef, _document);\n  }\n\n  /** Set initial visibility or set up subscription for changing visibility. */\n  ngOnInit(): void {\n    super.ngOnInit();\n\n    this._centeringSub = this._host._beforeCentering\n      .pipe(startWith(this._host._isCenterPosition(this._host._position)))\n      .subscribe((isCentering: boolean) => {\n        if (isCentering && !this.hasAttached()) {\n          this.attach(this._host._content);\n        }\n      });\n\n    this._leavingSub = this._host._afterLeavingCenter.subscribe(() => {\n      this.detach();\n    });\n  }\n\n  /** Clean up centering subscription. */\n  ngOnDestroy(): void {\n    super.ngOnDestroy();\n    this._centeringSub.unsubscribe();\n    this._leavingSub.unsubscribe();\n  }\n}\n\n/**\n * Base class with all of the `MatTabBody` functionality.\n * @docs-private\n */\n@Directive()\nexport abstract class _MatTabBodyBase implements OnInit, OnDestroy {\n  /** Current position of the tab-body in the tab-group. Zero means that the tab is visible. */\n  private _positionIndex: number;\n\n  /** Subscription to the directionality change observable. */\n  private _dirChangeSubscription = Subscription.EMPTY;\n\n  /** Tab body position state. Used by the animation trigger for the current state. */\n  _position: MatTabBodyPositionState;\n\n  /** Emits when an animation on the tab is complete. */\n  _translateTabComplete = new Subject<AnimationEvent>();\n\n  /** Event emitted when the tab begins to animate towards the center as the active tab. */\n  @Output() readonly _onCentering: EventEmitter<number> = new EventEmitter<number>();\n\n  /** Event emitted before the centering of the tab begins. */\n  @Output() readonly _beforeCentering: EventEmitter<boolean> = new EventEmitter<boolean>();\n\n  /** Event emitted before the centering of the tab begins. */\n  @Output() readonly _afterLeavingCenter: EventEmitter<void> = new EventEmitter<void>();\n\n  /** Event emitted when the tab completes its animation towards the center. */\n  @Output() readonly _onCentered: EventEmitter<void> = new EventEmitter<void>(true);\n\n   /** The portal host inside of this container into which the tab body content will be loaded. */\n  abstract _portalHost: PortalHostDirective;\n\n  /** The tab body content to display. */\n  @Input('content') _content: TemplatePortal;\n\n  /** Position that will be used when the tab is immediately becoming visible after creation. */\n  @Input() origin: number | null;\n\n  // Note that the default value will always be overwritten by `MatTabBody`, but we need one\n  // anyway to prevent the animations module from throwing an error if the body is used on its own.\n  /** Duration for the tab's animation. */\n  @Input() animationDuration: string = '500ms';\n\n  /** The shifted index position of the tab body, where zero represents the active center tab. */\n  @Input()\n  set position(position: number) {\n    this._positionIndex = position;\n    this._computePositionAnimationState();\n  }\n\n  constructor(private _elementRef: ElementRef<HTMLElement>,\n              @Optional() private _dir: Directionality,\n              changeDetectorRef: ChangeDetectorRef) {\n\n    if (_dir) {\n      this._dirChangeSubscription = _dir.change.subscribe((dir: Direction) => {\n        this._computePositionAnimationState(dir);\n        changeDetectorRef.markForCheck();\n      });\n    }\n\n    // Ensure that we get unique animation events, because the `.done` callback can get\n    // invoked twice in some browsers. See https://github.com/angular/angular/issues/24084.\n    this._translateTabComplete.pipe(distinctUntilChanged((x, y) => {\n      return x.fromState === y.fromState && x.toState === y.toState;\n    })).subscribe(event => {\n      // If the transition to the center is complete, emit an event.\n      if (this._isCenterPosition(event.toState) && this._isCenterPosition(this._position)) {\n        this._onCentered.emit();\n      }\n\n      if (this._isCenterPosition(event.fromState) && !this._isCenterPosition(this._position)) {\n        this._afterLeavingCenter.emit();\n      }\n    });\n  }\n\n  /**\n   * After initialized, check if the content is centered and has an origin. If so, set the\n   * special position states that transition the tab from the left or right before centering.\n   */\n  ngOnInit() {\n    if (this._position == 'center' && this.origin != null) {\n      this._position = this._computePositionFromOrigin(this.origin);\n    }\n  }\n\n  ngOnDestroy() {\n    this._dirChangeSubscription.unsubscribe();\n    this._translateTabComplete.complete();\n  }\n\n  _onTranslateTabStarted(event: AnimationEvent): void {\n    const isCentering = this._isCenterPosition(event.toState);\n    this._beforeCentering.emit(isCentering);\n    if (isCentering) {\n      this._onCentering.emit(this._elementRef.nativeElement.clientHeight);\n    }\n  }\n\n  /** The text direction of the containing app. */\n  _getLayoutDirection(): Direction {\n    return this._dir && this._dir.value === 'rtl' ? 'rtl' : 'ltr';\n  }\n\n  /** Whether the provided position state is considered center, regardless of origin. */\n  _isCenterPosition(position: MatTabBodyPositionState|string): boolean {\n    return position == 'center' ||\n        position == 'left-origin-center' ||\n        position == 'right-origin-center';\n  }\n\n  /** Computes the position state that will be used for the tab-body animation trigger. */\n  private _computePositionAnimationState(dir: Direction = this._getLayoutDirection()) {\n    if (this._positionIndex < 0) {\n      this._position = dir == 'ltr' ? 'left' : 'right';\n    } else if (this._positionIndex > 0) {\n      this._position = dir == 'ltr' ? 'right' : 'left';\n    } else {\n      this._position = 'center';\n    }\n  }\n\n  /**\n   * Computes the position state based on the specified origin position. This is used if the\n   * tab is becoming visible immediately after creation.\n   */\n  private _computePositionFromOrigin(origin: number): MatTabBodyPositionState {\n    const dir = this._getLayoutDirection();\n\n    if ((dir == 'ltr' && origin <= 0) || (dir == 'rtl' && origin > 0)) {\n      return 'left-origin-center';\n    }\n\n    return 'right-origin-center';\n  }\n}\n\n/**\n * Wrapper for the contents of a tab.\n * @docs-private\n */\n@Component({\n  selector: 'mat-tab-body',\n  templateUrl: 'tab-body.html',\n  styleUrls: ['tab-body.css'],\n  encapsulation: ViewEncapsulation.None,\n  // tslint:disable-next-line:validate-decorators\n  changeDetection: ChangeDetectionStrategy.Default,\n  animations: [matTabsAnimations.translateTab],\n  host: {\n    'class': 'mat-tab-body',\n  }\n})\nexport class MatTabBody extends _MatTabBodyBase {\n  @ViewChild(PortalHostDirective) _portalHost: PortalHostDirective;\n\n  constructor(elementRef: ElementRef<HTMLElement>,\n              @Optional() dir: Directionality,\n              changeDetectorRef: ChangeDetectorRef) {\n    super(elementRef, dir, changeDetectorRef);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {InjectionToken} from '@angular/core';\n\n/** Object that can be used to configure the default options for the tabs module. */\nexport interface MatTabsConfig {\n  /** Duration for the tab animation. Must be a valid CSS value (e.g. 600ms). */\n  animationDuration?: string;\n\n  /**\n   * Whether pagination should be disabled. This can be used to avoid unnecessary\n   * layout recalculations if it's known that pagination won't be required.\n   */\n  disablePagination?: boolean;\n\n  /**\n   * Whether the ink bar should fit its width to the size of the tab label content.\n   * This only applies to the MDC-based tabs.\n   */\n  fitInkBarToContent?: boolean;\n}\n\n/** Injection token that can be used to provide the default options the tabs module. */\nexport const MAT_TABS_CONFIG = new InjectionToken<MatTabsConfig>('MAT_TABS_CONFIG');\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  BooleanInput,\n  coerceBooleanProperty,\n  coerceNumberProperty,\n  NumberInput\n} from '@angular/cdk/coercion';\nimport {\n  AfterContentChecked,\n  AfterContentInit,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ContentChildren,\n  Directive,\n  ElementRef,\n  EventEmitter,\n  Inject,\n  Input,\n  OnDestroy,\n  Optional,\n  Output,\n  QueryList,\n  ViewChild,\n  ViewEncapsulation,\n} from '@angular/core';\nimport {\n  CanColor,\n  CanColorCtor,\n  CanDisableRipple,\n  CanDisableRippleCtor,\n  mixinColor,\n  mixinDisableRipple,\n  ThemePalette,\n} from '@angular/material/core';\nimport {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';\nimport {merge, Subscription} from 'rxjs';\nimport {startWith} from 'rxjs/operators';\nimport {MAT_TAB_GROUP, MatTab} from './tab';\nimport {MAT_TABS_CONFIG, MatTabsConfig} from './tab-config';\n\n\n/** Used to generate unique ID's for each tab component */\nlet nextId = 0;\n\n/** A simple change event emitted on focus or selection changes. */\nexport class MatTabChangeEvent {\n  /** Index of the currently-selected tab. */\n  index: number;\n  /** Reference to the currently-selected tab. */\n  tab: MatTab;\n}\n\n/** Possible positions for the tab header. */\nexport type MatTabHeaderPosition = 'above' | 'below';\n\n// Boilerplate for applying mixins to MatTabGroup.\n/** @docs-private */\nclass MatTabGroupMixinBase {\n  constructor(public _elementRef: ElementRef) {}\n}\nconst _MatTabGroupMixinBase: CanColorCtor & CanDisableRippleCtor & typeof MatTabGroupMixinBase =\n    mixinColor(mixinDisableRipple(MatTabGroupMixinBase), 'primary');\n\ninterface MatTabGroupBaseHeader {\n  _alignInkBarToSelectedTab: () => void;\n  focusIndex: number;\n}\n\n/**\n * Base class with all of the `MatTabGroupBase` functionality.\n * @docs-private\n */\n@Directive()\nexport abstract class _MatTabGroupBase extends _MatTabGroupMixinBase implements AfterContentInit,\n    AfterContentChecked, OnDestroy, CanColor, CanDisableRipple {\n\n  /**\n   * All tabs inside the tab group. This includes tabs that belong to groups that are nested\n   * inside the current one. We filter out only the tabs that belong to this group in `_tabs`.\n   */\n  abstract _allTabs: QueryList<MatTab>;\n  abstract _tabBodyWrapper: ElementRef;\n  abstract _tabHeader: MatTabGroupBaseHeader;\n\n  /** All of the tabs that belong to the group. */\n  _tabs: QueryList<MatTab> = new QueryList<MatTab>();\n\n  /** The tab index that should be selected after the content has been checked. */\n  private _indexToSelect: number | null = 0;\n\n  /** Snapshot of the height of the tab body wrapper before another tab is activated. */\n  private _tabBodyWrapperHeight: number = 0;\n\n  /** Subscription to tabs being added/removed. */\n  private _tabsSubscription = Subscription.EMPTY;\n\n  /** Subscription to changes in the tab labels. */\n  private _tabLabelSubscription = Subscription.EMPTY;\n\n  /** Whether the tab group should grow to the size of the active tab. */\n  @Input()\n  get dynamicHeight(): boolean { return this._dynamicHeight; }\n  set dynamicHeight(value: boolean) { this._dynamicHeight = coerceBooleanProperty(value); }\n  private _dynamicHeight: boolean = false;\n\n  /** The index of the active tab. */\n  @Input()\n  get selectedIndex(): number | null { return this._selectedIndex; }\n  set selectedIndex(value: number | null) {\n    this._indexToSelect = coerceNumberProperty(value, null);\n  }\n  private _selectedIndex: number | null = null;\n\n  /** Position of the tab header. */\n  @Input() headerPosition: MatTabHeaderPosition = 'above';\n\n  /** Duration for the tab animation. Will be normalized to milliseconds if no units are set. */\n  @Input()\n  get animationDuration(): string { return this._animationDuration; }\n  set animationDuration(value: string) {\n    this._animationDuration = /^\\d+$/.test(value) ? value + 'ms' : value;\n  }\n  private _animationDuration: string;\n\n  /**\n   * Whether pagination should be disabled. This can be used to avoid unnecessary\n   * layout recalculations if it's known that pagination won't be required.\n   */\n  @Input()\n  disablePagination: boolean;\n\n  /** Background color of the tab group. */\n  @Input()\n  get backgroundColor(): ThemePalette { return this._backgroundColor; }\n  set backgroundColor(value: ThemePalette) {\n    const nativeElement: HTMLElement = this._elementRef.nativeElement;\n\n    nativeElement.classList.remove(`mat-background-${this.backgroundColor}`);\n\n    if (value) {\n      nativeElement.classList.add(`mat-background-${value}`);\n    }\n\n    this._backgroundColor = value;\n  }\n  private _backgroundColor: ThemePalette;\n\n  /** Output to enable support for two-way binding on `[(selectedIndex)]` */\n  @Output() readonly selectedIndexChange: EventEmitter<number> = new EventEmitter<number>();\n\n  /** Event emitted when focus has changed within a tab group. */\n  @Output() readonly focusChange: EventEmitter<MatTabChangeEvent> =\n      new EventEmitter<MatTabChangeEvent>();\n\n  /** Event emitted when the body animation has completed */\n  @Output() readonly animationDone: EventEmitter<void> = new EventEmitter<void>();\n\n  /** Event emitted when the tab selection has changed. */\n  @Output() readonly selectedTabChange: EventEmitter<MatTabChangeEvent> =\n      new EventEmitter<MatTabChangeEvent>(true);\n\n  private _groupId: number;\n\n  constructor(elementRef: ElementRef,\n              protected _changeDetectorRef: ChangeDetectorRef,\n              @Inject(MAT_TABS_CONFIG) @Optional() defaultConfig?: MatTabsConfig,\n              @Optional() @Inject(ANIMATION_MODULE_TYPE) public _animationMode?: string) {\n    super(elementRef);\n    this._groupId = nextId++;\n    this.animationDuration = defaultConfig && defaultConfig.animationDuration ?\n        defaultConfig.animationDuration : '500ms';\n    this.disablePagination = defaultConfig && defaultConfig.disablePagination != null ?\n        defaultConfig.disablePagination : false;\n  }\n\n  /**\n   * After the content is checked, this component knows what tabs have been defined\n   * and what the selected index should be. This is where we can know exactly what position\n   * each tab should be in according to the new selected index, and additionally we know how\n   * a new selected tab should transition in (from the left or right).\n   */\n  ngAfterContentChecked() {\n    // Don't clamp the `indexToSelect` immediately in the setter because it can happen that\n    // the amount of tabs changes before the actual change detection runs.\n    const indexToSelect = this._indexToSelect = this._clampTabIndex(this._indexToSelect);\n\n    // If there is a change in selected index, emit a change event. Should not trigger if\n    // the selected index has not yet been initialized.\n    if (this._selectedIndex != indexToSelect) {\n      const isFirstRun = this._selectedIndex == null;\n\n      if (!isFirstRun) {\n        this.selectedTabChange.emit(this._createChangeEvent(indexToSelect));\n      }\n\n      // Changing these values after change detection has run\n      // since the checked content may contain references to them.\n      Promise.resolve().then(() => {\n        this._tabs.forEach((tab, index) => tab.isActive = index === indexToSelect);\n\n        if (!isFirstRun) {\n          this.selectedIndexChange.emit(indexToSelect);\n        }\n      });\n    }\n\n    // Setup the position for each tab and optionally setup an origin on the next selected tab.\n    this._tabs.forEach((tab: MatTab, index: number) => {\n      tab.position = index - indexToSelect;\n\n      // If there is already a selected tab, then set up an origin for the next selected tab\n      // if it doesn't have one already.\n      if (this._selectedIndex != null && tab.position == 0 && !tab.origin) {\n        tab.origin = indexToSelect - this._selectedIndex;\n      }\n    });\n\n    if (this._selectedIndex !== indexToSelect) {\n      this._selectedIndex = indexToSelect;\n      this._changeDetectorRef.markForCheck();\n    }\n  }\n\n  ngAfterContentInit() {\n    this._subscribeToAllTabChanges();\n    this._subscribeToTabLabels();\n\n    // Subscribe to changes in the amount of tabs, in order to be\n    // able to re-render the content as new tabs are added or removed.\n    this._tabsSubscription = this._tabs.changes.subscribe(() => {\n      const indexToSelect = this._clampTabIndex(this._indexToSelect);\n\n      // Maintain the previously-selected tab if a new tab is added or removed and there is no\n      // explicit change that selects a different tab.\n      if (indexToSelect === this._selectedIndex) {\n        const tabs = this._tabs.toArray();\n\n        for (let i = 0; i < tabs.length; i++) {\n          if (tabs[i].isActive) {\n            // Assign both to the `_indexToSelect` and `_selectedIndex` so we don't fire a changed\n            // event, otherwise the consumer may end up in an infinite loop in some edge cases like\n            // adding a tab within the `selectedIndexChange` event.\n            this._indexToSelect = this._selectedIndex = i;\n            break;\n          }\n        }\n      }\n\n      this._changeDetectorRef.markForCheck();\n    });\n  }\n\n  /** Listens to changes in all of the tabs. */\n  private _subscribeToAllTabChanges() {\n    // Since we use a query with `descendants: true` to pick up the tabs, we may end up catching\n    // some that are inside of nested tab groups. We filter them out manually by checking that\n    // the closest group to the tab is the current one.\n    this._allTabs.changes\n      .pipe(startWith(this._allTabs))\n      .subscribe((tabs: QueryList<MatTab>) => {\n        this._tabs.reset(tabs.filter(tab => {\n          // @breaking-change 10.0.0 Remove null check for `_closestTabGroup`\n          // once it becomes a required parameter in MatTab.\n          return !tab._closestTabGroup || tab._closestTabGroup === this;\n        }));\n        this._tabs.notifyOnChanges();\n      });\n  }\n\n  ngOnDestroy() {\n    this._tabs.destroy();\n    this._tabsSubscription.unsubscribe();\n    this._tabLabelSubscription.unsubscribe();\n  }\n\n  /** Re-aligns the ink bar to the selected tab element. */\n  realignInkBar() {\n    if (this._tabHeader) {\n      this._tabHeader._alignInkBarToSelectedTab();\n    }\n  }\n\n  _focusChanged(index: number) {\n    this.focusChange.emit(this._createChangeEvent(index));\n  }\n\n  private _createChangeEvent(index: number): MatTabChangeEvent {\n    const event = new MatTabChangeEvent;\n    event.index = index;\n    if (this._tabs && this._tabs.length) {\n      event.tab = this._tabs.toArray()[index];\n    }\n    return event;\n  }\n\n  /**\n   * Subscribes to changes in the tab labels. This is needed, because the @Input for the label is\n   * on the MatTab component, whereas the data binding is inside the MatTabGroup. In order for the\n   * binding to be updated, we need to subscribe to changes in it and trigger change detection\n   * manually.\n   */\n  private _subscribeToTabLabels() {\n    if (this._tabLabelSubscription) {\n      this._tabLabelSubscription.unsubscribe();\n    }\n\n    this._tabLabelSubscription = merge(...this._tabs.map(tab => tab._stateChanges))\n      .subscribe(() => this._changeDetectorRef.markForCheck());\n  }\n\n  /** Clamps the given index to the bounds of 0 and the tabs length. */\n  private _clampTabIndex(index: number | null): number {\n    // Note the `|| 0`, which ensures that values like NaN can't get through\n    // and which would otherwise throw the component into an infinite loop\n    // (since Math.max(NaN, 0) === NaN).\n    return Math.min(this._tabs.length - 1, Math.max(index || 0, 0));\n  }\n\n  /** Returns a unique id for each tab label element */\n  _getTabLabelId(i: number): string {\n    return `mat-tab-label-${this._groupId}-${i}`;\n  }\n\n  /** Returns a unique id for each tab content element */\n  _getTabContentId(i: number): string {\n    return `mat-tab-content-${this._groupId}-${i}`;\n  }\n\n  /**\n   * Sets the height of the body wrapper to the height of the activating tab if dynamic\n   * height property is true.\n   */\n  _setTabBodyWrapperHeight(tabHeight: number): void {\n    if (!this._dynamicHeight || !this._tabBodyWrapperHeight) { return; }\n\n    const wrapper: HTMLElement = this._tabBodyWrapper.nativeElement;\n\n    wrapper.style.height = this._tabBodyWrapperHeight + 'px';\n\n    // This conditional forces the browser to paint the height so that\n    // the animation to the new height can have an origin.\n    if (this._tabBodyWrapper.nativeElement.offsetHeight) {\n      wrapper.style.height = tabHeight + 'px';\n    }\n  }\n\n  /** Removes the height of the tab body wrapper. */\n  _removeTabBodyWrapperHeight(): void {\n    const wrapper = this._tabBodyWrapper.nativeElement;\n    this._tabBodyWrapperHeight = wrapper.clientHeight;\n    wrapper.style.height = '';\n    this.animationDone.emit();\n  }\n\n  /** Handle click events, setting new selected index if appropriate. */\n  _handleClick(tab: MatTab, tabHeader: MatTabGroupBaseHeader, index: number) {\n    if (!tab.disabled) {\n      this.selectedIndex = tabHeader.focusIndex = index;\n    }\n  }\n\n  /** Retrieves the tabindex for the tab. */\n  _getTabIndex(tab: MatTab, idx: number): number | null {\n    if (tab.disabled) {\n      return null;\n    }\n    return this.selectedIndex === idx ? 0 : -1;\n  }\n\n  static ngAcceptInputType_dynamicHeight: BooleanInput;\n  static ngAcceptInputType_animationDuration: NumberInput;\n  static ngAcceptInputType_selectedIndex: NumberInput;\n  static ngAcceptInputType_disableRipple: BooleanInput;\n}\n\n/**\n * Material design tab-group component. Supports basic tab pairs (label + content) and includes\n * animated ink-bar, keyboard navigation, and screen reader.\n * See: https://material.io/design/components/tabs.html\n */\n@Component({\n  selector: 'mat-tab-group',\n  exportAs: 'matTabGroup',\n  templateUrl: 'tab-group.html',\n  styleUrls: ['tab-group.css'],\n  encapsulation: ViewEncapsulation.None,\n  // tslint:disable-next-line:validate-decorators\n  changeDetection: ChangeDetectionStrategy.Default,\n  inputs: ['color', 'disableRipple'],\n  providers: [{\n    provide: MAT_TAB_GROUP,\n    useExisting: MatTabGroup\n  }],\n  host: {\n    'class': 'mat-tab-group',\n    '[class.mat-tab-group-dynamic-height]': 'dynamicHeight',\n    '[class.mat-tab-group-inverted-header]': 'headerPosition === \"below\"',\n  },\n})\nexport class MatTabGroup extends _MatTabGroupBase {\n  @ContentChildren(MatTab, {descendants: true}) _allTabs: QueryList<MatTab>;\n  @ViewChild('tabBodyWrapper') _tabBodyWrapper: ElementRef;\n  @ViewChild('tabHeader') _tabHeader: MatTabGroupBaseHeader;\n\n  constructor(elementRef: ElementRef,\n              changeDetectorRef: ChangeDetectorRef,\n              @Inject(MAT_TABS_CONFIG) @Optional() defaultConfig?: MatTabsConfig,\n              @Optional() @Inject(ANIMATION_MODULE_TYPE) animationMode?: string) {\n    super(elementRef, changeDetectorRef, defaultConfig, animationMode);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {BooleanInput} from '@angular/cdk/coercion';\nimport {Directive, ElementRef} from '@angular/core';\nimport {CanDisable, CanDisableCtor, mixinDisabled} from '@angular/material/core';\n\n\n// Boilerplate for applying mixins to MatTabLabelWrapper.\n/** @docs-private */\nclass MatTabLabelWrapperBase {}\nconst _MatTabLabelWrapperMixinBase: CanDisableCtor & typeof MatTabLabelWrapperBase =\n    mixinDisabled(MatTabLabelWrapperBase);\n\n/**\n * Used in the `mat-tab-group` view to display tab labels.\n * @docs-private\n */\n@Directive({\n  selector: '[matTabLabelWrapper]',\n  inputs: ['disabled'],\n  host: {\n    '[class.mat-tab-disabled]': 'disabled',\n    '[attr.aria-disabled]': '!!disabled',\n  }\n})\nexport class MatTabLabelWrapper extends _MatTabLabelWrapperMixinBase implements CanDisable {\n  constructor(public elementRef: ElementRef) {\n    super();\n  }\n\n  /** Sets focus on the wrapper element */\n  focus(): void {\n    this.elementRef.nativeElement.focus();\n  }\n\n  getOffsetLeft(): number {\n    return this.elementRef.nativeElement.offsetLeft;\n  }\n\n  getOffsetWidth(): number {\n    return this.elementRef.nativeElement.offsetWidth;\n  }\n\n  static ngAcceptInputType_disabled: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  ChangeDetectorRef,\n  ElementRef,\n  NgZone,\n  Optional,\n  QueryList,\n  EventEmitter,\n  AfterContentChecked,\n  AfterContentInit,\n  AfterViewInit,\n  OnDestroy,\n  Directive,\n  Inject,\n  Input,\n} from '@angular/core';\nimport {Direction, Directionality} from '@angular/cdk/bidi';\nimport {coerceNumberProperty, NumberInput} from '@angular/cdk/coercion';\nimport {ViewportRuler} from '@angular/cdk/scrolling';\nimport {FocusKeyManager, FocusableOption} from '@angular/cdk/a11y';\nimport {ENTER, SPACE, hasModifierKey} from '@angular/cdk/keycodes';\nimport {merge, of as observableOf, Subject, timer, fromEvent} from 'rxjs';\nimport {takeUntil} from 'rxjs/operators';\nimport {Platform, normalizePassiveListenerOptions} from '@angular/cdk/platform';\nimport {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';\n\n\n/** Config used to bind passive event listeners */\nconst passiveEventListenerOptions =\n    normalizePassiveListenerOptions({passive: true}) as EventListenerOptions;\n\n/**\n * The directions that scrolling can go in when the header's tabs exceed the header width. 'After'\n * will scroll the header towards the end of the tabs list and 'before' will scroll towards the\n * beginning of the list.\n */\nexport type ScrollDirection = 'after' | 'before';\n\n/**\n * The distance in pixels that will be overshot when scrolling a tab label into view. This helps\n * provide a small affordance to the label next to it.\n */\nconst EXAGGERATED_OVERSCROLL = 60;\n\n/**\n * Amount of milliseconds to wait before starting to scroll the header automatically.\n * Set a little conservatively in order to handle fake events dispatched on touch devices.\n */\nconst HEADER_SCROLL_DELAY = 650;\n\n/**\n * Interval in milliseconds at which to scroll the header\n * while the user is holding their pointer.\n */\nconst HEADER_SCROLL_INTERVAL = 100;\n\n/** Item inside a paginated tab header. */\nexport type MatPaginatedTabHeaderItem = FocusableOption & {elementRef: ElementRef};\n\n/**\n * Base class for a tab header that supported pagination.\n * @docs-private\n */\n@Directive()\nexport abstract class MatPaginatedTabHeader implements AfterContentChecked, AfterContentInit,\n  AfterViewInit, OnDestroy {\n  abstract _items: QueryList<MatPaginatedTabHeaderItem>;\n  abstract _inkBar: {hide: () => void, alignToElement: (element: HTMLElement) => void};\n  abstract _tabListContainer: ElementRef<HTMLElement>;\n  abstract _tabList: ElementRef<HTMLElement>;\n  abstract _nextPaginator: ElementRef<HTMLElement>;\n  abstract _previousPaginator: ElementRef<HTMLElement>;\n\n  /** The distance in pixels that the tab labels should be translated to the left. */\n  private _scrollDistance = 0;\n\n  /** Whether the header should scroll to the selected index after the view has been checked. */\n  private _selectedIndexChanged = false;\n\n  /** Emits when the component is destroyed. */\n  protected readonly _destroyed = new Subject<void>();\n\n  /** Whether the controls for pagination should be displayed */\n  _showPaginationControls = false;\n\n  /** Whether the tab list can be scrolled more towards the end of the tab label list. */\n  _disableScrollAfter = true;\n\n  /** Whether the tab list can be scrolled more towards the beginning of the tab label list. */\n  _disableScrollBefore = true;\n\n  /**\n   * The number of tab labels that are displayed on the header. When this changes, the header\n   * should re-evaluate the scroll position.\n   */\n  private _tabLabelCount: number;\n\n  /** Whether the scroll distance has changed and should be applied after the view is checked. */\n  private _scrollDistanceChanged: boolean;\n\n  /** Used to manage focus between the tabs. */\n  private _keyManager: FocusKeyManager<MatPaginatedTabHeaderItem>;\n\n  /** Cached text content of the header. */\n  private _currentTextContent: string;\n\n  /** Stream that will stop the automated scrolling. */\n  private _stopScrolling = new Subject<void>();\n\n  /**\n   * Whether pagination should be disabled. This can be used to avoid unnecessary\n   * layout recalculations if it's known that pagination won't be required.\n   */\n  @Input()\n  disablePagination: boolean = false;\n\n  /** The index of the active tab. */\n  get selectedIndex(): number { return this._selectedIndex; }\n  set selectedIndex(value: number) {\n    value = coerceNumberProperty(value);\n\n    if (this._selectedIndex != value) {\n      this._selectedIndexChanged = true;\n      this._selectedIndex = value;\n\n      if (this._keyManager) {\n        this._keyManager.updateActiveItem(value);\n      }\n    }\n  }\n  private _selectedIndex: number = 0;\n\n  /** Event emitted when the option is selected. */\n  readonly selectFocusedIndex: EventEmitter<number> = new EventEmitter<number>();\n\n  /** Event emitted when a label is focused. */\n  readonly indexFocused: EventEmitter<number> = new EventEmitter<number>();\n\n  constructor(protected _elementRef: ElementRef<HTMLElement>,\n              protected _changeDetectorRef: ChangeDetectorRef,\n              private _viewportRuler: ViewportRuler,\n              @Optional() private _dir: Directionality,\n              private _ngZone: NgZone,\n              /**\n               * @deprecated @breaking-change 9.0.0 `_platform` and `_animationMode`\n               * parameters to become required.\n               */\n              private _platform?: Platform,\n              @Optional() @Inject(ANIMATION_MODULE_TYPE) public _animationMode?: string) {\n\n    // Bind the `mouseleave` event on the outside since it doesn't change anything in the view.\n    _ngZone.runOutsideAngular(() => {\n      fromEvent(_elementRef.nativeElement, 'mouseleave')\n        .pipe(takeUntil(this._destroyed))\n        .subscribe(() => {\n          this._stopInterval();\n        });\n    });\n  }\n\n  /** Called when the user has selected an item via the keyboard. */\n  protected abstract _itemSelected(event: KeyboardEvent): void;\n\n  ngAfterViewInit() {\n    // We need to handle these events manually, because we want to bind passive event listeners.\n    fromEvent(this._previousPaginator.nativeElement, 'touchstart', passiveEventListenerOptions)\n      .pipe(takeUntil(this._destroyed))\n      .subscribe(() => {\n        this._handlePaginatorPress('before');\n      });\n\n    fromEvent(this._nextPaginator.nativeElement, 'touchstart', passiveEventListenerOptions)\n      .pipe(takeUntil(this._destroyed))\n      .subscribe(() => {\n        this._handlePaginatorPress('after');\n      });\n  }\n\n  ngAfterContentInit() {\n    const dirChange = this._dir ? this._dir.change : observableOf(null);\n    const resize = this._viewportRuler.change(150);\n    const realign = () => {\n      this.updatePagination();\n      this._alignInkBarToSelectedTab();\n    };\n\n    this._keyManager = new FocusKeyManager<MatPaginatedTabHeaderItem>(this._items)\n      .withHorizontalOrientation(this._getLayoutDirection())\n      .withHomeAndEnd()\n      .withWrap();\n\n    this._keyManager.updateActiveItem(this._selectedIndex);\n\n    // Defer the first call in order to allow for slower browsers to lay out the elements.\n    // This helps in cases where the user lands directly on a page with paginated tabs.\n    typeof requestAnimationFrame !== 'undefined' ? requestAnimationFrame(realign) : realign();\n\n    // On dir change or window resize, realign the ink bar and update the orientation of\n    // the key manager if the direction has changed.\n    merge(dirChange, resize, this._items.changes).pipe(takeUntil(this._destroyed)).subscribe(() => {\n      // We need to defer this to give the browser some time to recalculate the element dimensions.\n      Promise.resolve().then(realign);\n      this._keyManager.withHorizontalOrientation(this._getLayoutDirection());\n    });\n\n    // If there is a change in the focus key manager we need to emit the `indexFocused`\n    // event in order to provide a public event that notifies about focus changes. Also we realign\n    // the tabs container by scrolling the new focused tab into the visible section.\n    this._keyManager.change.pipe(takeUntil(this._destroyed)).subscribe(newFocusIndex => {\n      this.indexFocused.emit(newFocusIndex);\n      this._setTabFocus(newFocusIndex);\n    });\n  }\n\n  ngAfterContentChecked(): void {\n    // If the number of tab labels have changed, check if scrolling should be enabled\n    if (this._tabLabelCount != this._items.length) {\n      this.updatePagination();\n      this._tabLabelCount = this._items.length;\n      this._changeDetectorRef.markForCheck();\n    }\n\n    // If the selected index has changed, scroll to the label and check if the scrolling controls\n    // should be disabled.\n    if (this._selectedIndexChanged) {\n      this._scrollToLabel(this._selectedIndex);\n      this._checkScrollingControls();\n      this._alignInkBarToSelectedTab();\n      this._selectedIndexChanged = false;\n      this._changeDetectorRef.markForCheck();\n    }\n\n    // If the scroll distance has been changed (tab selected, focused, scroll controls activated),\n    // then translate the header to reflect this.\n    if (this._scrollDistanceChanged) {\n      this._updateTabScrollPosition();\n      this._scrollDistanceChanged = false;\n      this._changeDetectorRef.markForCheck();\n    }\n  }\n\n  ngOnDestroy() {\n    this._destroyed.next();\n    this._destroyed.complete();\n    this._stopScrolling.complete();\n  }\n\n  /** Handles keyboard events on the header. */\n  _handleKeydown(event: KeyboardEvent) {\n    // We don't handle any key bindings with a modifier key.\n    if (hasModifierKey(event)) {\n      return;\n    }\n\n    switch (event.keyCode) {\n      case ENTER:\n      case SPACE:\n        if (this.focusIndex !== this.selectedIndex) {\n          this.selectFocusedIndex.emit(this.focusIndex);\n          this._itemSelected(event);\n        }\n        break;\n      default:\n        this._keyManager.onKeydown(event);\n    }\n  }\n\n  /**\n   * Callback for when the MutationObserver detects that the content has changed.\n   */\n  _onContentChanges() {\n    const textContent = this._elementRef.nativeElement.textContent;\n\n    // We need to diff the text content of the header, because the MutationObserver callback\n    // will fire even if the text content didn't change which is inefficient and is prone\n    // to infinite loops if a poorly constructed expression is passed in (see #14249).\n    if (textContent !== this._currentTextContent) {\n      this._currentTextContent = textContent || '';\n\n      // The content observer runs outside the `NgZone` by default, which\n      // means that we need to bring the callback back in ourselves.\n      this._ngZone.run(() => {\n        this.updatePagination();\n        this._alignInkBarToSelectedTab();\n        this._changeDetectorRef.markForCheck();\n      });\n    }\n  }\n\n  /**\n   * Updates the view whether pagination should be enabled or not.\n   *\n   * WARNING: Calling this method can be very costly in terms of performance. It should be called\n   * as infrequently as possible from outside of the Tabs component as it causes a reflow of the\n   * page.\n   */\n  updatePagination() {\n    this._checkPaginationEnabled();\n    this._checkScrollingControls();\n    this._updateTabScrollPosition();\n  }\n\n  /** Tracks which element has focus; used for keyboard navigation */\n  get focusIndex(): number {\n    return this._keyManager ? this._keyManager.activeItemIndex! : 0;\n  }\n\n  /** When the focus index is set, we must manually send focus to the correct label */\n  set focusIndex(value: number) {\n    if (!this._isValidIndex(value) || this.focusIndex === value || !this._keyManager) {\n      return;\n    }\n\n    this._keyManager.setActiveItem(value);\n  }\n\n  /**\n   * Determines if an index is valid.  If the tabs are not ready yet, we assume that the user is\n   * providing a valid index and return true.\n   */\n  _isValidIndex(index: number): boolean {\n    if (!this._items) { return true; }\n\n    const tab = this._items ? this._items.toArray()[index] : null;\n    return !!tab && !tab.disabled;\n  }\n\n  /**\n   * Sets focus on the HTML element for the label wrapper and scrolls it into the view if\n   * scrolling is enabled.\n   */\n  _setTabFocus(tabIndex: number) {\n    if (this._showPaginationControls) {\n      this._scrollToLabel(tabIndex);\n    }\n\n    if (this._items && this._items.length) {\n      this._items.toArray()[tabIndex].focus();\n\n      // Do not let the browser manage scrolling to focus the element, this will be handled\n      // by using translation. In LTR, the scroll left should be 0. In RTL, the scroll width\n      // should be the full width minus the offset width.\n      const containerEl = this._tabListContainer.nativeElement;\n      const dir = this._getLayoutDirection();\n\n      if (dir == 'ltr') {\n        containerEl.scrollLeft = 0;\n      } else {\n        containerEl.scrollLeft = containerEl.scrollWidth - containerEl.offsetWidth;\n      }\n    }\n  }\n\n  /** The layout direction of the containing app. */\n  _getLayoutDirection(): Direction {\n    return this._dir && this._dir.value === 'rtl' ? 'rtl' : 'ltr';\n  }\n\n  /** Performs the CSS transformation on the tab list that will cause the list to scroll. */\n  _updateTabScrollPosition() {\n    if (this.disablePagination) {\n      return;\n    }\n\n    const scrollDistance = this.scrollDistance;\n    const platform = this._platform;\n    const translateX = this._getLayoutDirection() === 'ltr' ? -scrollDistance : scrollDistance;\n\n    // Don't use `translate3d` here because we don't want to create a new layer. A new layer\n    // seems to cause flickering and overflow in Internet Explorer. For example, the ink bar\n    // and ripples will exceed the boundaries of the visible tab bar.\n    // See: https://github.com/angular/components/issues/10276\n    // We round the `transform` here, because transforms with sub-pixel precision cause some\n    // browsers to blur the content of the element.\n    this._tabList.nativeElement.style.transform = `translateX(${Math.round(translateX)}px)`;\n\n    // Setting the `transform` on IE will change the scroll offset of the parent, causing the\n    // position to be thrown off in some cases. We have to reset it ourselves to ensure that\n    // it doesn't get thrown off. Note that we scope it only to IE and Edge, because messing\n    // with the scroll position throws off Chrome 71+ in RTL mode (see #14689).\n    // @breaking-change 9.0.0 Remove null check for `platform` after it can no longer be undefined.\n    if (platform && (platform.TRIDENT || platform.EDGE)) {\n      this._tabListContainer.nativeElement.scrollLeft = 0;\n    }\n  }\n\n  /** Sets the distance in pixels that the tab header should be transformed in the X-axis. */\n  get scrollDistance(): number { return this._scrollDistance; }\n  set scrollDistance(value: number) {\n    this._scrollTo(value);\n  }\n\n  /**\n   * Moves the tab list in the 'before' or 'after' direction (towards the beginning of the list or\n   * the end of the list, respectively). The distance to scroll is computed to be a third of the\n   * length of the tab list view window.\n   *\n   * This is an expensive call that forces a layout reflow to compute box and scroll metrics and\n   * should be called sparingly.\n   */\n  _scrollHeader(direction: ScrollDirection) {\n    const viewLength = this._tabListContainer.nativeElement.offsetWidth;\n\n    // Move the scroll distance one-third the length of the tab list's viewport.\n    const scrollAmount = (direction == 'before' ? -1 : 1) * viewLength / 3;\n\n    return this._scrollTo(this._scrollDistance + scrollAmount);\n  }\n\n  /** Handles click events on the pagination arrows. */\n  _handlePaginatorClick(direction: ScrollDirection) {\n    this._stopInterval();\n    this._scrollHeader(direction);\n  }\n\n  /**\n   * Moves the tab list such that the desired tab label (marked by index) is moved into view.\n   *\n   * This is an expensive call that forces a layout reflow to compute box and scroll metrics and\n   * should be called sparingly.\n   */\n  _scrollToLabel(labelIndex: number) {\n    if (this.disablePagination) {\n      return;\n    }\n\n    const selectedLabel = this._items ? this._items.toArray()[labelIndex] : null;\n\n    if (!selectedLabel) {\n      return;\n    }\n\n    // The view length is the visible width of the tab labels.\n    const viewLength = this._tabListContainer.nativeElement.offsetWidth;\n    const {offsetLeft, offsetWidth} = selectedLabel.elementRef.nativeElement;\n\n    let labelBeforePos: number, labelAfterPos: number;\n    if (this._getLayoutDirection() == 'ltr') {\n      labelBeforePos = offsetLeft;\n      labelAfterPos = labelBeforePos + offsetWidth;\n    } else {\n      labelAfterPos = this._tabList.nativeElement.offsetWidth - offsetLeft;\n      labelBeforePos = labelAfterPos - offsetWidth;\n    }\n\n    const beforeVisiblePos = this.scrollDistance;\n    const afterVisiblePos = this.scrollDistance + viewLength;\n\n    if (labelBeforePos < beforeVisiblePos) {\n      // Scroll header to move label to the before direction\n      this.scrollDistance -= beforeVisiblePos - labelBeforePos + EXAGGERATED_OVERSCROLL;\n    } else if (labelAfterPos > afterVisiblePos) {\n      // Scroll header to move label to the after direction\n      this.scrollDistance += labelAfterPos - afterVisiblePos + EXAGGERATED_OVERSCROLL;\n    }\n  }\n\n  /**\n   * Evaluate whether the pagination controls should be displayed. If the scroll width of the\n   * tab list is wider than the size of the header container, then the pagination controls should\n   * be shown.\n   *\n   * This is an expensive call that forces a layout reflow to compute box and scroll metrics and\n   * should be called sparingly.\n   */\n  _checkPaginationEnabled() {\n    if (this.disablePagination) {\n      this._showPaginationControls = false;\n    } else {\n      const isEnabled =\n          this._tabList.nativeElement.scrollWidth > this._elementRef.nativeElement.offsetWidth;\n\n      if (!isEnabled) {\n        this.scrollDistance = 0;\n      }\n\n      if (isEnabled !== this._showPaginationControls) {\n        this._changeDetectorRef.markForCheck();\n      }\n\n      this._showPaginationControls = isEnabled;\n    }\n  }\n\n  /**\n   * Evaluate whether the before and after controls should be enabled or disabled.\n   * If the header is at the beginning of the list (scroll distance is equal to 0) then disable the\n   * before button. If the header is at the end of the list (scroll distance is equal to the\n   * maximum distance we can scroll), then disable the after button.\n   *\n   * This is an expensive call that forces a layout reflow to compute box and scroll metrics and\n   * should be called sparingly.\n   */\n  _checkScrollingControls() {\n    if (this.disablePagination) {\n      this._disableScrollAfter = this._disableScrollBefore = true;\n    } else {\n      // Check if the pagination arrows should be activated.\n      this._disableScrollBefore = this.scrollDistance == 0;\n      this._disableScrollAfter = this.scrollDistance == this._getMaxScrollDistance();\n      this._changeDetectorRef.markForCheck();\n    }\n  }\n\n  /**\n   * Determines what is the maximum length in pixels that can be set for the scroll distance. This\n   * is equal to the difference in width between the tab list container and tab header container.\n   *\n   * This is an expensive call that forces a layout reflow to compute box and scroll metrics and\n   * should be called sparingly.\n   */\n  _getMaxScrollDistance(): number {\n    const lengthOfTabList = this._tabList.nativeElement.scrollWidth;\n    const viewLength = this._tabListContainer.nativeElement.offsetWidth;\n    return (lengthOfTabList - viewLength) || 0;\n  }\n\n  /** Tells the ink-bar to align itself to the current label wrapper */\n  _alignInkBarToSelectedTab(): void {\n    const selectedItem = this._items && this._items.length ?\n        this._items.toArray()[this.selectedIndex] : null;\n    const selectedLabelWrapper = selectedItem ? selectedItem.elementRef.nativeElement : null;\n\n    if (selectedLabelWrapper) {\n      this._inkBar.alignToElement(selectedLabelWrapper);\n    } else {\n      this._inkBar.hide();\n    }\n  }\n\n  /** Stops the currently-running paginator interval.  */\n  _stopInterval() {\n    this._stopScrolling.next();\n  }\n\n  /**\n   * Handles the user pressing down on one of the paginators.\n   * Starts scrolling the header after a certain amount of time.\n   * @param direction In which direction the paginator should be scrolled.\n   */\n  _handlePaginatorPress(direction: ScrollDirection, mouseEvent?: MouseEvent) {\n    // Don't start auto scrolling for right mouse button clicks. Note that we shouldn't have to\n    // null check the `button`, but we do it so we don't break tests that use fake events.\n    if (mouseEvent && mouseEvent.button != null && mouseEvent.button !== 0) {\n      return;\n    }\n\n    // Avoid overlapping timers.\n    this._stopInterval();\n\n    // Start a timer after the delay and keep firing based on the interval.\n    timer(HEADER_SCROLL_DELAY, HEADER_SCROLL_INTERVAL)\n      // Keep the timer going until something tells it to stop or the component is destroyed.\n      .pipe(takeUntil(merge(this._stopScrolling, this._destroyed)))\n      .subscribe(() => {\n        const {maxScrollDistance, distance} = this._scrollHeader(direction);\n\n        // Stop the timer if we've reached the start or the end.\n        if (distance === 0 || distance >= maxScrollDistance) {\n          this._stopInterval();\n        }\n      });\n  }\n\n  /**\n   * Scrolls the header to a given position.\n   * @param position Position to which to scroll.\n   * @returns Information on the current scroll distance and the maximum.\n   */\n  private _scrollTo(position: number) {\n    if (this.disablePagination) {\n      return {maxScrollDistance: 0, distance: 0};\n    }\n\n    const maxScrollDistance = this._getMaxScrollDistance();\n    this._scrollDistance = Math.max(0, Math.min(maxScrollDistance, position));\n\n    // Mark that the scroll distance has changed so that after the view is checked, the CSS\n    // transformation can move the header.\n    this._scrollDistanceChanged = true;\n    this._checkScrollingControls();\n\n    return {maxScrollDistance, distance: this._scrollDistance};\n  }\n\n  static ngAcceptInputType_selectedIndex: NumberInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directionality} from '@angular/cdk/bidi';\nimport {ViewportRuler} from '@angular/cdk/scrolling';\nimport {\n  AfterContentChecked,\n  AfterContentInit,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ContentChildren,\n  ElementRef,\n  NgZone,\n  OnDestroy,\n  Optional,\n  QueryList,\n  ViewChild,\n  ViewEncapsulation,\n  AfterViewInit,\n  Input,\n  Inject,\n  Directive,\n} from '@angular/core';\nimport {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {MatInkBar} from './ink-bar';\nimport {MatTabLabelWrapper} from './tab-label-wrapper';\nimport {Platform} from '@angular/cdk/platform';\nimport {MatPaginatedTabHeader} from './paginated-tab-header';\n\n/**\n * Base class with all of the `MatTabHeader` functionality.\n * @docs-private\n */\n@Directive()\nexport abstract class _MatTabHeaderBase extends MatPaginatedTabHeader implements\n  AfterContentChecked, AfterContentInit, AfterViewInit, OnDestroy {\n\n  /** Whether the ripple effect is disabled or not. */\n  @Input()\n  get disableRipple() { return this._disableRipple; }\n  set disableRipple(value: any) { this._disableRipple = coerceBooleanProperty(value); }\n  private _disableRipple: boolean = false;\n\n  constructor(elementRef: ElementRef,\n              changeDetectorRef: ChangeDetectorRef,\n              viewportRuler: ViewportRuler,\n              @Optional() dir: Directionality,\n              ngZone: NgZone,\n              platform: Platform,\n              // @breaking-change 9.0.0 `_animationMode` parameter to be made required.\n              @Optional() @Inject(ANIMATION_MODULE_TYPE) animationMode?: string) {\n    super(elementRef, changeDetectorRef, viewportRuler, dir, ngZone, platform, animationMode);\n  }\n\n  protected _itemSelected(event: KeyboardEvent) {\n    event.preventDefault();\n  }\n}\n\n/**\n * The header of the tab group which displays a list of all the tabs in the tab group. Includes\n * an ink bar that follows the currently selected tab. When the tabs list's width exceeds the\n * width of the header container, then arrows will be displayed to allow the user to scroll\n * left and right across the header.\n * @docs-private\n */\n@Component({\n  selector: 'mat-tab-header',\n  templateUrl: 'tab-header.html',\n  styleUrls: ['tab-header.css'],\n  inputs: ['selectedIndex'],\n  outputs: ['selectFocusedIndex', 'indexFocused'],\n  encapsulation: ViewEncapsulation.None,\n  // tslint:disable-next-line:validate-decorators\n  changeDetection: ChangeDetectionStrategy.Default,\n  host: {\n    'class': 'mat-tab-header',\n    '[class.mat-tab-header-pagination-controls-enabled]': '_showPaginationControls',\n    '[class.mat-tab-header-rtl]': \"_getLayoutDirection() == 'rtl'\",\n  },\n})\nexport class MatTabHeader extends _MatTabHeaderBase {\n  @ContentChildren(MatTabLabelWrapper, {descendants: false}) _items: QueryList<MatTabLabelWrapper>;\n  @ViewChild(MatInkBar, {static: true}) _inkBar: MatInkBar;\n  @ViewChild('tabListContainer', {static: true}) _tabListContainer: ElementRef;\n  @ViewChild('tabList', {static: true}) _tabList: ElementRef;\n  @ViewChild('nextPaginator') _nextPaginator: ElementRef<HTMLElement>;\n  @ViewChild('previousPaginator') _previousPaginator: ElementRef<HTMLElement>;\n\n  constructor(elementRef: ElementRef,\n              changeDetectorRef: ChangeDetectorRef,\n              viewportRuler: ViewportRuler,\n              @Optional() dir: Directionality,\n              ngZone: NgZone,\n              platform: Platform,\n              // @breaking-change 9.0.0 `_animationMode` parameter to be made required.\n              @Optional() @Inject(ANIMATION_MODULE_TYPE) animationMode?: string) {\n    super(elementRef, changeDetectorRef, viewportRuler, dir, ngZone, platform, animationMode);\n  }\n\n  static ngAcceptInputType_disableRipple: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {Directionality} from '@angular/cdk/bidi';\nimport {Platform} from '@angular/cdk/platform';\nimport {ViewportRuler} from '@angular/cdk/scrolling';\nimport {\n  AfterContentChecked,\n  AfterContentInit,\n  Attribute,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ContentChildren,\n  Directive,\n  ElementRef,\n  forwardRef,\n  Inject,\n  Input,\n  NgZone,\n  OnDestroy,\n  Optional,\n  QueryList,\n  ViewChild,\n  ViewEncapsulation,\n  AfterViewInit,\n} from '@angular/core';\nimport {\n  CanDisable, CanDisableCtor,\n  CanDisableRipple, CanDisableRippleCtor,\n  HasTabIndex, HasTabIndexCtor,\n  MAT_RIPPLE_GLOBAL_OPTIONS,\n  mixinDisabled,\n  mixinDisableRipple,\n  mixinTabIndex, RippleConfig,\n  RippleGlobalOptions,\n  RippleRenderer,\n  RippleTarget,\n  ThemePalette,\n} from '@angular/material/core';\nimport {BooleanInput, coerceBooleanProperty, NumberInput} from '@angular/cdk/coercion';\nimport {FocusMonitor, FocusableOption} from '@angular/cdk/a11y';\nimport {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';\nimport {MatInkBar} from '../ink-bar';\nimport {MatPaginatedTabHeader, MatPaginatedTabHeaderItem} from '../paginated-tab-header';\nimport {startWith, takeUntil} from 'rxjs/operators';\n\n/**\n * Base class with all of the `MatTabNav` functionality.\n * @docs-private\n */\n@Directive()\nexport abstract class _MatTabNavBase extends MatPaginatedTabHeader implements AfterContentChecked,\n  AfterContentInit, OnDestroy {\n\n  /** Query list of all tab links of the tab navigation. */\n  abstract _items: QueryList<MatPaginatedTabHeaderItem & {active: boolean}>;\n\n  /** Background color of the tab nav. */\n  @Input()\n  get backgroundColor(): ThemePalette { return this._backgroundColor; }\n  set backgroundColor(value: ThemePalette) {\n    const classList = this._elementRef.nativeElement.classList;\n    classList.remove(`mat-background-${this.backgroundColor}`);\n\n    if (value) {\n      classList.add(`mat-background-${value}`);\n    }\n\n    this._backgroundColor = value;\n  }\n  private _backgroundColor: ThemePalette;\n\n  /** Whether the ripple effect is disabled or not. */\n  @Input()\n  get disableRipple() { return this._disableRipple; }\n  set disableRipple(value: any) { this._disableRipple = coerceBooleanProperty(value); }\n  private _disableRipple: boolean = false;\n\n  /** Theme color of the nav bar. */\n  @Input() color: ThemePalette = 'primary';\n\n  constructor(elementRef: ElementRef,\n              @Optional() dir: Directionality,\n              ngZone: NgZone,\n              changeDetectorRef: ChangeDetectorRef,\n              viewportRuler: ViewportRuler,\n              /**\n               * @deprecated @breaking-change 9.0.0 `platform` parameter to become required.\n               */\n              platform?: Platform,\n              @Optional() @Inject(ANIMATION_MODULE_TYPE) animationMode?: string) {\n    super(elementRef, changeDetectorRef, viewportRuler, dir, ngZone, platform, animationMode);\n  }\n\n  protected _itemSelected() {\n    // noop\n  }\n\n  ngAfterContentInit() {\n    // We need this to run before the `changes` subscription in parent to ensure that the\n    // selectedIndex is up-to-date by the time the super class starts looking for it.\n    this._items.changes.pipe(startWith(null), takeUntil(this._destroyed)).subscribe(() => {\n      this.updateActiveLink();\n    });\n\n    super.ngAfterContentInit();\n  }\n\n  /**\n   * Notifies the component that the active link has been changed.\n   * @breaking-change 8.0.0 `element` parameter to be removed.\n   */\n  updateActiveLink(_element?: ElementRef) {\n    if (!this._items) {\n      return;\n    }\n\n    const items = this._items.toArray();\n\n    for (let i = 0; i < items.length; i++) {\n      if (items[i].active) {\n        this.selectedIndex = i;\n        this._changeDetectorRef.markForCheck();\n        return;\n      }\n    }\n\n    // The ink bar should hide itself if no items are active.\n    this.selectedIndex = -1;\n    this._inkBar.hide();\n  }\n}\n\n\n/**\n * Navigation component matching the styles of the tab group header.\n * Provides anchored navigation with animated ink bar.\n */\n@Component({\n  selector: '[mat-tab-nav-bar]',\n  exportAs: 'matTabNavBar, matTabNav',\n  inputs: ['color'],\n  templateUrl: 'tab-nav-bar.html',\n  styleUrls: ['tab-nav-bar.css'],\n  host: {\n    'class': 'mat-tab-nav-bar mat-tab-header',\n    '[class.mat-tab-header-pagination-controls-enabled]': '_showPaginationControls',\n    '[class.mat-tab-header-rtl]': \"_getLayoutDirection() == 'rtl'\",\n    '[class.mat-primary]': 'color !== \"warn\" && color !== \"accent\"',\n    '[class.mat-accent]': 'color === \"accent\"',\n    '[class.mat-warn]': 'color === \"warn\"',\n  },\n  encapsulation: ViewEncapsulation.None,\n  // tslint:disable-next-line:validate-decorators\n  changeDetection: ChangeDetectionStrategy.Default,\n})\nexport class MatTabNav extends _MatTabNavBase {\n  @ContentChildren(forwardRef(() => MatTabLink), {descendants: true}) _items: QueryList<MatTabLink>;\n  @ViewChild(MatInkBar, {static: true}) _inkBar: MatInkBar;\n  @ViewChild('tabListContainer', {static: true}) _tabListContainer: ElementRef;\n  @ViewChild('tabList', {static: true}) _tabList: ElementRef;\n  @ViewChild('nextPaginator') _nextPaginator: ElementRef<HTMLElement>;\n  @ViewChild('previousPaginator') _previousPaginator: ElementRef<HTMLElement>;\n\n  constructor(elementRef: ElementRef,\n    @Optional() dir: Directionality,\n    ngZone: NgZone,\n    changeDetectorRef: ChangeDetectorRef,\n    viewportRuler: ViewportRuler,\n    /**\n     * @deprecated @breaking-change 9.0.0 `platform` parameter to become required.\n     */\n    platform?: Platform,\n    @Optional() @Inject(ANIMATION_MODULE_TYPE) animationMode?: string) {\n    super(elementRef, dir, ngZone, changeDetectorRef, viewportRuler, platform, animationMode);\n  }\n\n  static ngAcceptInputType_disableRipple: BooleanInput;\n}\n\n// Boilerplate for applying mixins to MatTabLink.\nclass MatTabLinkMixinBase {}\nconst _MatTabLinkMixinBase:\n    HasTabIndexCtor & CanDisableRippleCtor & CanDisableCtor & typeof MatTabLinkMixinBase =\n        mixinTabIndex(mixinDisableRipple(mixinDisabled(MatTabLinkMixinBase)));\n\n/** Base class with all of the `MatTabLink` functionality. */\n@Directive()\nexport class _MatTabLinkBase extends _MatTabLinkMixinBase implements AfterViewInit, OnDestroy,\n  CanDisable, CanDisableRipple, HasTabIndex, RippleTarget, FocusableOption {\n\n  /** Whether the tab link is active or not. */\n  protected _isActive: boolean = false;\n\n  /** Whether the link is active. */\n  @Input()\n  get active(): boolean { return this._isActive; }\n  set active(value: boolean) {\n    if (value !== this._isActive) {\n      this._isActive = value;\n      this._tabNavBar.updateActiveLink(this.elementRef);\n    }\n  }\n\n  /**\n   * Ripple configuration for ripples that are launched on pointer down. The ripple config\n   * is set to the global ripple options since we don't have any configurable options for\n   * the tab link ripples.\n   * @docs-private\n   */\n  rippleConfig: RippleConfig & RippleGlobalOptions;\n\n  /**\n   * Whether ripples are disabled on interaction.\n   * @docs-private\n   */\n  get rippleDisabled(): boolean {\n    return this.disabled || this.disableRipple || this._tabNavBar.disableRipple ||\n      !!this.rippleConfig.disabled;\n  }\n\n  constructor(\n      private _tabNavBar: _MatTabNavBase, public elementRef: ElementRef,\n      @Optional() @Inject(MAT_RIPPLE_GLOBAL_OPTIONS) globalRippleOptions: RippleGlobalOptions|null,\n      @Attribute('tabindex') tabIndex: string, private _focusMonitor: FocusMonitor,\n      @Optional() @Inject(ANIMATION_MODULE_TYPE) animationMode?: string) {\n    super();\n\n    this.rippleConfig = globalRippleOptions || {};\n    this.tabIndex = parseInt(tabIndex) || 0;\n\n    if (animationMode === 'NoopAnimations') {\n      this.rippleConfig.animation = {enterDuration: 0, exitDuration: 0};\n    }\n  }\n\n  focus() {\n    this.elementRef.nativeElement.focus();\n  }\n\n  ngAfterViewInit() {\n    this._focusMonitor.monitor(this.elementRef);\n  }\n\n  ngOnDestroy() {\n    this._focusMonitor.stopMonitoring(this.elementRef);\n  }\n\n  static ngAcceptInputType_disabled: BooleanInput;\n  static ngAcceptInputType_disableRipple: BooleanInput;\n  static ngAcceptInputType_tabIndex: NumberInput;\n}\n\n\n/**\n * Link inside of a `mat-tab-nav-bar`.\n */\n@Directive({\n  selector: '[mat-tab-link], [matTabLink]',\n  exportAs: 'matTabLink',\n  inputs: ['disabled', 'disableRipple', 'tabIndex'],\n  host: {\n    'class': 'mat-tab-link mat-focus-indicator',\n    '[attr.aria-current]': 'active ? \"page\" : null',\n    '[attr.aria-disabled]': 'disabled',\n    '[attr.tabIndex]': 'tabIndex',\n    '[class.mat-tab-disabled]': 'disabled',\n    '[class.mat-tab-label-active]': 'active',\n  }\n})\nexport class MatTabLink extends _MatTabLinkBase implements OnDestroy {\n  /** Reference to the RippleRenderer for the tab-link. */\n  private _tabLinkRipple: RippleRenderer;\n\n  constructor(\n    tabNavBar: MatTabNav, elementRef: ElementRef, ngZone: NgZone,\n    platform: Platform,\n    @Optional() @Inject(MAT_RIPPLE_GLOBAL_OPTIONS) globalRippleOptions: RippleGlobalOptions|null,\n    @Attribute('tabindex') tabIndex: string, focusMonitor: FocusMonitor,\n    @Optional() @Inject(ANIMATION_MODULE_TYPE) animationMode?: string) {\n    super(tabNavBar, elementRef, globalRippleOptions, tabIndex, focusMonitor, animationMode);\n    this._tabLinkRipple = new RippleRenderer(this, ngZone, elementRef, platform);\n    this._tabLinkRipple.setupTriggerEvents(elementRef.nativeElement);\n  }\n\n  ngOnDestroy() {\n    super.ngOnDestroy();\n    this._tabLinkRipple._removeTriggerEvents();\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {A11yModule} from '@angular/cdk/a11y';\nimport {ObserversModule} from '@angular/cdk/observers';\nimport {PortalModule} from '@angular/cdk/portal';\nimport {CommonModule} from '@angular/common';\nimport {NgModule} from '@angular/core';\nimport {MatCommonModule, MatRippleModule} from '@angular/material/core';\nimport {MatInkBar} from './ink-bar';\nimport {MatTab} from './tab';\nimport {MatTabBody, MatTabBodyPortal} from './tab-body';\nimport {MatTabContent} from './tab-content';\nimport {MatTabGroup} from './tab-group';\nimport {MatTabHeader} from './tab-header';\nimport {MatTabLabel} from './tab-label';\nimport {MatTabLabelWrapper} from './tab-label-wrapper';\nimport {MatTabLink, MatTabNav} from './tab-nav-bar/tab-nav-bar';\n\n\n@NgModule({\n  imports: [\n    CommonModule,\n    MatCommonModule,\n    PortalModule,\n    MatRippleModule,\n    ObserversModule,\n    A11yModule,\n  ],\n  // Don't export all components because some are only to be used internally.\n  exports: [\n    MatCommonModule,\n    MatTabGroup,\n    MatTabLabel,\n    MatTab,\n    MatTabNav,\n    MatTabLink,\n    MatTabContent,\n  ],\n  declarations: [\n    MatTabGroup,\n    MatTabLabel,\n    MatTab,\n    MatInkBar,\n    MatTabLabelWrapper,\n    MatTabNav,\n    MatTabLink,\n    MatTabBody,\n    MatTabBodyPortal,\n    MatTabHeader,\n    MatTabContent,\n  ],\n})\nexport class MatTabsModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './tab-nav-bar';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport {MatTabsModule} from './tabs-module';\nexport * from './tab-group';\nexport {MatInkBar, _MatInkBarPositioner, _MAT_INK_BAR_POSITIONER} from './ink-bar';\nexport {\n  MatTabBody,\n  _MatTabBodyBase,\n  MatTabBodyOriginState,\n  MatTabBodyPositionState,\n  MatTabBodyPortal\n} from './tab-body';\nexport {MatTabHeader, _MatTabHeaderBase} from './tab-header';\nexport {MatTabLabelWrapper} from './tab-label-wrapper';\nexport {MatTab, MAT_TAB_GROUP} from './tab';\nexport {MatTabLabel} from './tab-label';\nexport {MatTabNav, MatTabLink, _MatTabNavBase, _MatTabLinkBase} from './tab-nav-bar/index';\nexport {MatTabContent} from './tab-content';\nexport {ScrollDirection} from './paginated-tab-header';\nexport * from './tabs-animations';\nexport {MAT_TABS_CONFIG, MatTabsConfig} from './tab-config';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n\nexport {_MAT_INK_BAR_POSITIONER_FACTORY as ɵangular_material_src_material_tabs_tabs_a} from './ink-bar';\nexport {MatPaginatedTabHeader as ɵangular_material_src_material_tabs_tabs_d} from './paginated-tab-header';\nexport {MAT_TAB_CONTENT as ɵangular_material_src_material_tabs_tabs_c} from './tab-content';\nexport {MAT_TAB_LABEL as ɵangular_material_src_material_tabs_tabs_b} from './tab-label';","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar delayWhen_1 = require(\"../../operator/delayWhen\");\nrxjs_1.Observable.prototype.delayWhen = delayWhen_1.delayWhen;\n//# sourceMappingURL=delayWhen.js.map","function _nonIterableRest() {\n  throw new TypeError(\"Invalid attempt to destructure non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");\n}\n\nmodule.exports = _nonIterableRest;","import { Subject, AnonymousSubject } from '../../Subject';\nimport { Subscriber } from '../../Subscriber';\nimport { Observable } from '../../Observable';\nimport { Subscription } from '../../Subscription';\nimport { ReplaySubject } from '../../ReplaySubject';\nconst DEFAULT_WEBSOCKET_CONFIG = {\n    url: '',\n    deserializer: (e) => JSON.parse(e.data),\n    serializer: (value) => JSON.stringify(value),\n};\nconst WEBSOCKETSUBJECT_INVALID_ERROR_OBJECT = 'WebSocketSubject.error must be called with an object with an error code, and an optional reason: { code: number, reason: string }';\nexport class WebSocketSubject extends AnonymousSubject {\n    constructor(urlConfigOrSource, destination) {\n        super();\n        if (urlConfigOrSource instanceof Observable) {\n            this.destination = destination;\n            this.source = urlConfigOrSource;\n        }\n        else {\n            const config = this._config = Object.assign({}, DEFAULT_WEBSOCKET_CONFIG);\n            this._output = new Subject();\n            if (typeof urlConfigOrSource === 'string') {\n                config.url = urlConfigOrSource;\n            }\n            else {\n                for (let key in urlConfigOrSource) {\n                    if (urlConfigOrSource.hasOwnProperty(key)) {\n                        config[key] = urlConfigOrSource[key];\n                    }\n                }\n            }\n            if (!config.WebSocketCtor && WebSocket) {\n                config.WebSocketCtor = WebSocket;\n            }\n            else if (!config.WebSocketCtor) {\n                throw new Error('no WebSocket constructor can be found');\n            }\n            this.destination = new ReplaySubject();\n        }\n    }\n    lift(operator) {\n        const sock = new WebSocketSubject(this._config, this.destination);\n        sock.operator = operator;\n        sock.source = this;\n        return sock;\n    }\n    _resetState() {\n        this._socket = null;\n        if (!this.source) {\n            this.destination = new ReplaySubject();\n        }\n        this._output = new Subject();\n    }\n    multiplex(subMsg, unsubMsg, messageFilter) {\n        const self = this;\n        return new Observable((observer) => {\n            try {\n                self.next(subMsg());\n            }\n            catch (err) {\n                observer.error(err);\n            }\n            const subscription = self.subscribe(x => {\n                try {\n                    if (messageFilter(x)) {\n                        observer.next(x);\n                    }\n                }\n                catch (err) {\n                    observer.error(err);\n                }\n            }, err => observer.error(err), () => observer.complete());\n            return () => {\n                try {\n                    self.next(unsubMsg());\n                }\n                catch (err) {\n                    observer.error(err);\n                }\n                subscription.unsubscribe();\n            };\n        });\n    }\n    _connectSocket() {\n        const { WebSocketCtor, protocol, url, binaryType } = this._config;\n        const observer = this._output;\n        let socket = null;\n        try {\n            socket = protocol ?\n                new WebSocketCtor(url, protocol) :\n                new WebSocketCtor(url);\n            this._socket = socket;\n            if (binaryType) {\n                this._socket.binaryType = binaryType;\n            }\n        }\n        catch (e) {\n            observer.error(e);\n            return;\n        }\n        const subscription = new Subscription(() => {\n            this._socket = null;\n            if (socket && socket.readyState === 1) {\n                socket.close();\n            }\n        });\n        socket.onopen = (e) => {\n            const { _socket } = this;\n            if (!_socket) {\n                socket.close();\n                this._resetState();\n                return;\n            }\n            const { openObserver } = this._config;\n            if (openObserver) {\n                openObserver.next(e);\n            }\n            const queue = this.destination;\n            this.destination = Subscriber.create((x) => {\n                if (socket.readyState === 1) {\n                    try {\n                        const { serializer } = this._config;\n                        socket.send(serializer(x));\n                    }\n                    catch (e) {\n                        this.destination.error(e);\n                    }\n                }\n            }, (e) => {\n                const { closingObserver } = this._config;\n                if (closingObserver) {\n                    closingObserver.next(undefined);\n                }\n                if (e && e.code) {\n                    socket.close(e.code, e.reason);\n                }\n                else {\n                    observer.error(new TypeError(WEBSOCKETSUBJECT_INVALID_ERROR_OBJECT));\n                }\n                this._resetState();\n            }, () => {\n                const { closingObserver } = this._config;\n                if (closingObserver) {\n                    closingObserver.next(undefined);\n                }\n                socket.close();\n                this._resetState();\n            });\n            if (queue && queue instanceof ReplaySubject) {\n                subscription.add(queue.subscribe(this.destination));\n            }\n        };\n        socket.onerror = (e) => {\n            this._resetState();\n            observer.error(e);\n        };\n        socket.onclose = (e) => {\n            this._resetState();\n            const { closeObserver } = this._config;\n            if (closeObserver) {\n                closeObserver.next(e);\n            }\n            if (e.wasClean) {\n                observer.complete();\n            }\n            else {\n                observer.error(e);\n            }\n        };\n        socket.onmessage = (e) => {\n            try {\n                const { deserializer } = this._config;\n                observer.next(deserializer(e));\n            }\n            catch (err) {\n                observer.error(err);\n            }\n        };\n    }\n    _subscribe(subscriber) {\n        const { source } = this;\n        if (source) {\n            return source.subscribe(subscriber);\n        }\n        if (!this._socket) {\n            this._connectSocket();\n        }\n        this._output.subscribe(subscriber);\n        subscriber.add(() => {\n            const { _socket } = this;\n            if (this._output.observers.length === 0) {\n                if (_socket && _socket.readyState === 1) {\n                    _socket.close();\n                }\n                this._resetState();\n            }\n        });\n        return subscriber;\n    }\n    unsubscribe() {\n        const { _socket } = this;\n        if (_socket && _socket.readyState === 1) {\n            _socket.close();\n        }\n        this._resetState();\n        super.unsubscribe();\n    }\n}\n//# sourceMappingURL=WebSocketSubject.js.map","import { Subscriber } from '../Subscriber';\nexport function refCount() {\n    return function refCountOperatorFunction(source) {\n        return source.lift(new RefCountOperator(source));\n    };\n}\nclass RefCountOperator {\n    constructor(connectable) {\n        this.connectable = connectable;\n    }\n    call(subscriber, source) {\n        const { connectable } = this;\n        connectable._refCount++;\n        const refCounter = new RefCountSubscriber(subscriber, connectable);\n        const subscription = source.subscribe(refCounter);\n        if (!refCounter.closed) {\n            refCounter.connection = connectable.connect();\n        }\n        return subscription;\n    }\n}\nclass RefCountSubscriber extends Subscriber {\n    constructor(destination, connectable) {\n        super(destination);\n        this.connectable = connectable;\n    }\n    _unsubscribe() {\n        const { connectable } = this;\n        if (!connectable) {\n            this.connection = null;\n            return;\n        }\n        this.connectable = null;\n        const refCount = connectable._refCount;\n        if (refCount <= 0) {\n            this.connection = null;\n            return;\n        }\n        connectable._refCount = refCount - 1;\n        if (refCount > 1) {\n            this.connection = null;\n            return;\n        }\n        const { connection } = this;\n        const sharedConnection = connectable._connection;\n        this.connection = null;\n        if (sharedConnection && (!connection || sharedConnection === connection)) {\n            sharedConnection.unsubscribe();\n        }\n    }\n}\n//# sourceMappingURL=refCount.js.map","import { Observable } from '../Observable';\nimport { subscribeToPromise } from '../util/subscribeToPromise';\nimport { schedulePromise } from '../scheduled/schedulePromise';\nexport function fromPromise(input, scheduler) {\n    if (!scheduler) {\n        return new Observable(subscribeToPromise(input));\n    }\n    else {\n        return schedulePromise(input, scheduler);\n    }\n}\n//# sourceMappingURL=fromPromise.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive} from '@angular/core';\nimport {CdkStepLabel} from '@angular/cdk/stepper';\n\n@Directive({\n  selector: '[matStepLabel]',\n})\nexport class MatStepLabel extends CdkStepLabel {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable, Optional, SkipSelf} from '@angular/core';\nimport {Subject} from 'rxjs';\n\n\n/** Stepper data that is required for internationalization. */\n@Injectable({providedIn: 'root'})\nexport class MatStepperIntl {\n  /**\n   * Stream that emits whenever the labels here are changed. Use this to notify\n   * components if the labels have changed after initialization.\n   */\n  readonly changes: Subject<void> = new Subject<void>();\n\n  /** Label that is rendered below optional steps. */\n  optionalLabel: string = 'Optional';\n}\n\n\n/** @docs-private */\nexport function MAT_STEPPER_INTL_PROVIDER_FACTORY(parentIntl: MatStepperIntl) {\n  return parentIntl || new MatStepperIntl();\n}\n\n/** @docs-private */\nexport const MAT_STEPPER_INTL_PROVIDER = {\n  provide: MatStepperIntl,\n  deps: [[new Optional(), new SkipSelf(), MatStepperIntl]],\n  useFactory: MAT_STEPPER_INTL_PROVIDER_FACTORY\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {FocusMonitor} from '@angular/cdk/a11y';\nimport {\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ElementRef,\n  Input,\n  OnDestroy,\n  ViewEncapsulation,\n  TemplateRef,\n  AfterViewInit,\n} from '@angular/core';\nimport {Subscription} from 'rxjs';\nimport {MatStepLabel} from './step-label';\nimport {MatStepperIntl} from './stepper-intl';\nimport {MatStepperIconContext} from './stepper-icon';\nimport {CdkStepHeader, StepState} from '@angular/cdk/stepper';\n\n\n@Component({\n  selector: 'mat-step-header',\n  templateUrl: 'step-header.html',\n  styleUrls: ['step-header.css'],\n  host: {\n    'class': 'mat-step-header mat-focus-indicator',\n    'role': 'tab',\n  },\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n})\nexport class MatStepHeader extends CdkStepHeader implements AfterViewInit, OnDestroy {\n  private _intlSubscription: Subscription;\n\n  /** State of the given step. */\n  @Input() state: StepState;\n\n  /** Label of the given step. */\n  @Input() label: MatStepLabel | string;\n\n  /** Error message to display when there's an error. */\n  @Input() errorMessage: string;\n\n  /** Overrides for the header icons, passed in via the stepper. */\n  @Input() iconOverrides: {[key: string]: TemplateRef<MatStepperIconContext>};\n\n  /** Index of the given step. */\n  @Input() index: number;\n\n  /** Whether the given step is selected. */\n  @Input() selected: boolean;\n\n  /** Whether the given step label is active. */\n  @Input() active: boolean;\n\n  /** Whether the given step is optional. */\n  @Input() optional: boolean;\n\n  /** Whether the ripple should be disabled. */\n  @Input() disableRipple: boolean;\n\n  constructor(\n    public _intl: MatStepperIntl,\n    private _focusMonitor: FocusMonitor,\n    _elementRef: ElementRef<HTMLElement>,\n    changeDetectorRef: ChangeDetectorRef) {\n    super(_elementRef);\n    this._intlSubscription = _intl.changes.subscribe(() => changeDetectorRef.markForCheck());\n  }\n\n  ngAfterViewInit() {\n    this._focusMonitor.monitor(this._elementRef, true);\n  }\n\n  ngOnDestroy() {\n    this._intlSubscription.unsubscribe();\n    this._focusMonitor.stopMonitoring(this._elementRef);\n  }\n\n  /** Focuses the step header. */\n  focus() {\n    this._focusMonitor.focusVia(this._elementRef, 'program');\n  }\n\n  /** Returns string label of given step if it is a text label. */\n  _stringLabel(): string | null {\n    return this.label instanceof MatStepLabel ? null : this.label;\n  }\n\n  /** Returns MatStepLabel if the label of given step is a template label. */\n  _templateLabel(): MatStepLabel | null {\n    return this.label instanceof MatStepLabel ? this.label : null;\n  }\n\n  /** Returns the host HTML element. */\n  _getHostElement() {\n    return this._elementRef.nativeElement;\n  }\n\n  /** Template context variables that are exposed to the `matStepperIcon` instances. */\n  _getIconContext(): MatStepperIconContext {\n    return {\n      index: this.index,\n      active: this.active,\n      optional: this.optional\n    };\n  }\n\n  _getDefaultTextForState(state: StepState): string {\n    if (state == 'number') {\n      return `${this.index + 1}`;\n    }\n    if (state == 'edit') {\n      return 'create';\n    }\n    if (state == 'error') {\n      return 'warning';\n    }\n    return state;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {\n  animate,\n  state,\n  style,\n  transition,\n  trigger,\n  AnimationTriggerMetadata,\n} from '@angular/animations';\n\n/**\n * Animations used by the Material steppers.\n * @docs-private\n */\nexport const matStepperAnimations: {\n  readonly horizontalStepTransition: AnimationTriggerMetadata;\n  readonly verticalStepTransition: AnimationTriggerMetadata;\n} = {\n  /** Animation that transitions the step along the X axis in a horizontal stepper. */\n  horizontalStepTransition: trigger('stepTransition', [\n    state('previous', style({transform: 'translate3d(-100%, 0, 0)', visibility: 'hidden'})),\n    state('current', style({transform: 'none', visibility: 'visible'})),\n    state('next', style({transform: 'translate3d(100%, 0, 0)', visibility: 'hidden'})),\n    transition('* => *', animate('500ms cubic-bezier(0.35, 0, 0.25, 1)'))\n  ]),\n\n  /** Animation that transitions the step along the Y axis in a vertical stepper. */\n  verticalStepTransition: trigger('stepTransition', [\n    state('previous', style({height: '0px', visibility: 'hidden'})),\n    state('next', style({height: '0px', visibility: 'hidden'})),\n    state('current', style({height: '*', visibility: 'visible'})),\n    transition('* <=> current', animate('225ms cubic-bezier(0.4, 0.0, 0.2, 1)'))\n  ])\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directive, Input, TemplateRef} from '@angular/core';\nimport {StepState} from '@angular/cdk/stepper';\n\n/** Template context available to an attached `matStepperIcon`. */\nexport interface MatStepperIconContext {\n  /** Index of the step. */\n  index: number;\n  /** Whether the step is currently active. */\n  active: boolean;\n  /** Whether the step is optional. */\n  optional: boolean;\n}\n\n/**\n * Template to be used to override the icons inside the step header.\n */\n@Directive({\n  selector: 'ng-template[matStepperIcon]',\n})\nexport class MatStepperIcon {\n  /** Name of the icon to be overridden. */\n  @Input('matStepperIcon') name: StepState;\n\n  constructor(public templateRef: TemplateRef<MatStepperIconContext>) {}\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Directionality} from '@angular/cdk/bidi';\nimport {BooleanInput} from '@angular/cdk/coercion';\nimport {\n  CdkStep,\n  CdkStepper,\n  StepContentPositionState,\n  STEPPER_GLOBAL_OPTIONS,\n  StepperOptions\n} from '@angular/cdk/stepper';\nimport {AnimationEvent} from '@angular/animations';\nimport {\n  AfterContentInit,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ContentChild,\n  ContentChildren,\n  Directive,\n  ElementRef,\n  EventEmitter,\n  forwardRef,\n  Inject,\n  Input,\n  Optional,\n  Output,\n  QueryList,\n  SkipSelf,\n  TemplateRef,\n  ViewChildren,\n  ViewEncapsulation,\n} from '@angular/core';\nimport {FormControl, FormGroupDirective, NgForm} from '@angular/forms';\nimport {DOCUMENT} from '@angular/common';\nimport {ErrorStateMatcher} from '@angular/material/core';\nimport {Subject} from 'rxjs';\nimport {takeUntil, distinctUntilChanged} from 'rxjs/operators';\n\nimport {MatStepHeader} from './step-header';\nimport {MatStepLabel} from './step-label';\nimport {matStepperAnimations} from './stepper-animations';\nimport {MatStepperIcon, MatStepperIconContext} from './stepper-icon';\n\n@Component({\n  selector: 'mat-step',\n  templateUrl: 'step.html',\n  providers: [\n    {provide: ErrorStateMatcher, useExisting: MatStep},\n    {provide: CdkStep, useExisting: MatStep},\n  ],\n  encapsulation: ViewEncapsulation.None,\n  exportAs: 'matStep',\n  changeDetection: ChangeDetectionStrategy.OnPush,\n})\nexport class MatStep extends CdkStep implements ErrorStateMatcher {\n  /** Content for step label given by `<ng-template matStepLabel>`. */\n  @ContentChild(MatStepLabel) stepLabel: MatStepLabel;\n\n  /** @breaking-change 8.0.0 remove the `?` after `stepperOptions` */\n  constructor(@Inject(forwardRef(() => MatStepper)) stepper: MatStepper,\n              @SkipSelf() private _errorStateMatcher: ErrorStateMatcher,\n              @Optional() @Inject(STEPPER_GLOBAL_OPTIONS) stepperOptions?: StepperOptions) {\n    super(stepper, stepperOptions);\n  }\n\n  /** Custom error state matcher that additionally checks for validity of interacted form. */\n  isErrorState(control: FormControl | null, form: FormGroupDirective | NgForm | null): boolean {\n    const originalErrorState = this._errorStateMatcher.isErrorState(control, form);\n\n    // Custom error state checks for the validity of form that is not submitted or touched\n    // since user can trigger a form change by calling for another step without directly\n    // interacting with the current form.\n    const customErrorState = !!(control && control.invalid && this.interacted);\n\n    return originalErrorState || customErrorState;\n  }\n}\n\n\n@Directive({selector: '[matStepper]', providers: [{provide: CdkStepper, useExisting: MatStepper}]})\nexport class MatStepper extends CdkStepper implements AfterContentInit {\n  /** The list of step headers of the steps in the stepper. */\n  @ViewChildren(MatStepHeader) _stepHeader: QueryList<MatStepHeader>;\n\n  /** Full list of steps inside the stepper, including inside nested steppers. */\n  @ContentChildren(MatStep, {descendants: true}) _steps: QueryList<MatStep>;\n\n  /** Steps that belong to the current stepper, excluding ones from nested steppers. */\n  readonly steps: QueryList<MatStep> = new QueryList<MatStep>();\n\n  /** Custom icon overrides passed in by the consumer. */\n  @ContentChildren(MatStepperIcon, {descendants: true}) _icons: QueryList<MatStepperIcon>;\n\n  /** Event emitted when the current step is done transitioning in. */\n  @Output() readonly animationDone: EventEmitter<void> = new EventEmitter<void>();\n\n  /** Whether ripples should be disabled for the step headers. */\n  @Input() disableRipple: boolean;\n\n  /** Consumer-specified template-refs to be used to override the header icons. */\n  _iconOverrides: {[key: string]: TemplateRef<MatStepperIconContext>} = {};\n\n  /** Stream of animation `done` events when the body expands/collapses. */\n  _animationDone = new Subject<AnimationEvent>();\n\n  ngAfterContentInit() {\n    super.ngAfterContentInit();\n    this._icons.forEach(({name, templateRef}) => this._iconOverrides[name] = templateRef);\n\n    // Mark the component for change detection whenever the content children query changes\n    this.steps.changes.pipe(takeUntil(this._destroyed)).subscribe(() => {\n      this._stateChanged();\n    });\n\n    this._animationDone.pipe(\n      // This needs a `distinctUntilChanged` in order to avoid emitting the same event twice due\n      // to a bug in animations where the `.done` callback gets invoked twice on some browsers.\n      // See https://github.com/angular/angular/issues/24084\n      distinctUntilChanged((x, y) => x.fromState === y.fromState && x.toState === y.toState),\n      takeUntil(this._destroyed)\n    ).subscribe(event => {\n      if ((event.toState as StepContentPositionState) === 'current') {\n        this.animationDone.emit();\n      }\n    });\n  }\n\n  static ngAcceptInputType_editable: BooleanInput;\n  static ngAcceptInputType_optional: BooleanInput;\n  static ngAcceptInputType_completed: BooleanInput;\n  static ngAcceptInputType_hasError: BooleanInput;\n}\n\n@Component({\n  selector: 'mat-horizontal-stepper',\n  exportAs: 'matHorizontalStepper',\n  templateUrl: 'stepper-horizontal.html',\n  styleUrls: ['stepper.css'],\n  inputs: ['selectedIndex'],\n  host: {\n    'class': 'mat-stepper-horizontal',\n    '[class.mat-stepper-label-position-end]': 'labelPosition == \"end\"',\n    '[class.mat-stepper-label-position-bottom]': 'labelPosition == \"bottom\"',\n    'aria-orientation': 'horizontal',\n    'role': 'tablist',\n  },\n  animations: [matStepperAnimations.horizontalStepTransition],\n  providers: [\n    {provide: MatStepper, useExisting: MatHorizontalStepper},\n    {provide: CdkStepper, useExisting: MatHorizontalStepper}\n  ],\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n})\nexport class MatHorizontalStepper extends MatStepper {\n  /** Whether the label should display in bottom or end position. */\n  @Input()\n  labelPosition: 'bottom' | 'end' = 'end';\n\n  static ngAcceptInputType_editable: BooleanInput;\n  static ngAcceptInputType_optional: BooleanInput;\n  static ngAcceptInputType_completed: BooleanInput;\n  static ngAcceptInputType_hasError: BooleanInput;\n}\n\n@Component({\n  selector: 'mat-vertical-stepper',\n  exportAs: 'matVerticalStepper',\n  templateUrl: 'stepper-vertical.html',\n  styleUrls: ['stepper.css'],\n  inputs: ['selectedIndex'],\n  host: {\n    'class': 'mat-stepper-vertical',\n    'aria-orientation': 'vertical',\n    'role': 'tablist',\n  },\n  animations: [matStepperAnimations.verticalStepTransition],\n  providers: [\n    {provide: MatStepper, useExisting: MatVerticalStepper},\n    {provide: CdkStepper, useExisting: MatVerticalStepper}\n  ],\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n})\nexport class MatVerticalStepper extends MatStepper {\n  constructor(\n    @Optional() dir: Directionality,\n    changeDetectorRef: ChangeDetectorRef,\n    // @breaking-change 8.0.0 `elementRef` and `_document` parameters to become required.\n    elementRef?: ElementRef<HTMLElement>,\n    @Inject(DOCUMENT) _document?: any) {\n    super(dir, changeDetectorRef, elementRef, _document);\n    this._orientation = 'vertical';\n  }\n\n  static ngAcceptInputType_editable: BooleanInput;\n  static ngAcceptInputType_optional: BooleanInput;\n  static ngAcceptInputType_completed: BooleanInput;\n  static ngAcceptInputType_hasError: BooleanInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {CdkStepperNext, CdkStepperPrevious} from '@angular/cdk/stepper';\nimport {Directive} from '@angular/core';\n\n/** Button that moves to the next step in a stepper workflow. */\n@Directive({\n  selector: 'button[matStepperNext]',\n  host: {\n    'class': 'mat-stepper-next',\n    '[type]': 'type',\n  },\n  inputs: ['type']\n})\nexport class MatStepperNext extends CdkStepperNext {\n}\n\n/** Button that moves to the previous step in a stepper workflow. */\n@Directive({\n  selector: 'button[matStepperPrevious]',\n  host: {\n    'class': 'mat-stepper-previous',\n    '[type]': 'type',\n  },\n  inputs: ['type']\n})\nexport class MatStepperPrevious extends CdkStepperPrevious {\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {PortalModule} from '@angular/cdk/portal';\nimport {CdkStepperModule} from '@angular/cdk/stepper';\nimport {CommonModule} from '@angular/common';\nimport {NgModule} from '@angular/core';\nimport {MatButtonModule} from '@angular/material/button';\nimport {ErrorStateMatcher, MatCommonModule, MatRippleModule} from '@angular/material/core';\nimport {MatIconModule} from '@angular/material/icon';\nimport {MatStepHeader} from './step-header';\nimport {MatStepLabel} from './step-label';\nimport {MatHorizontalStepper, MatStep, MatStepper, MatVerticalStepper} from './stepper';\nimport {MatStepperNext, MatStepperPrevious} from './stepper-button';\nimport {MatStepperIcon} from './stepper-icon';\nimport {MAT_STEPPER_INTL_PROVIDER} from './stepper-intl';\n\n\n@NgModule({\n  imports: [\n    MatCommonModule,\n    CommonModule,\n    PortalModule,\n    MatButtonModule,\n    CdkStepperModule,\n    MatIconModule,\n    MatRippleModule,\n  ],\n  exports: [\n    MatCommonModule,\n    MatHorizontalStepper,\n    MatVerticalStepper,\n    MatStep,\n    MatStepLabel,\n    MatStepper,\n    MatStepperNext,\n    MatStepperPrevious,\n    MatStepHeader,\n    MatStepperIcon,\n  ],\n  declarations: [\n    MatHorizontalStepper,\n    MatVerticalStepper,\n    MatStep,\n    MatStepLabel,\n    MatStepper,\n    MatStepperNext,\n    MatStepperPrevious,\n    MatStepHeader,\n    MatStepperIcon,\n  ],\n  providers: [MAT_STEPPER_INTL_PROVIDER, ErrorStateMatcher],\n})\nexport class MatStepperModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './stepper-module';\nexport * from './step-label';\nexport * from './stepper';\nexport * from './stepper-button';\nexport * from './step-header';\nexport * from './stepper-intl';\nexport * from './stepper-animations';\nexport * from './stepper-icon';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n","const __window = typeof window !== 'undefined' && window;\nconst __self = typeof self !== 'undefined' && typeof WorkerGlobalScope !== 'undefined' &&\n    self instanceof WorkerGlobalScope && self;\nconst __global = typeof global !== 'undefined' && global;\nconst _root = __window || __global || __self;\n(function () {\n    if (!_root) {\n        throw new Error('RxJS could not find any global context (window, self, global)');\n    }\n})();\nexport { _root as root };\n//# sourceMappingURL=root.js.map","import { Subscriber } from '../Subscriber';\nexport function defaultIfEmpty(defaultValue = null) {\n    return (source) => source.lift(new DefaultIfEmptyOperator(defaultValue));\n}\nclass DefaultIfEmptyOperator {\n    constructor(defaultValue) {\n        this.defaultValue = defaultValue;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new DefaultIfEmptySubscriber(subscriber, this.defaultValue));\n    }\n}\nclass DefaultIfEmptySubscriber extends Subscriber {\n    constructor(destination, defaultValue) {\n        super(destination);\n        this.defaultValue = defaultValue;\n        this.isEmpty = true;\n    }\n    _next(value) {\n        this.isEmpty = false;\n        this.destination.next(value);\n    }\n    _complete() {\n        if (this.isEmpty) {\n            this.destination.next(this.defaultValue);\n        }\n        this.destination.complete();\n    }\n}\n//# sourceMappingURL=defaultIfEmpty.js.map","import { Observable } from '../Observable';\nimport { isArray } from '../util/isArray';\nimport { isFunction } from '../util/isFunction';\nimport { map } from '../operators/map';\nconst toString = (() => Object.prototype.toString)();\nexport function fromEvent(target, eventName, options, resultSelector) {\n    if (isFunction(options)) {\n        resultSelector = options;\n        options = undefined;\n    }\n    if (resultSelector) {\n        return fromEvent(target, eventName, options).pipe(map(args => isArray(args) ? resultSelector(...args) : resultSelector(args)));\n    }\n    return new Observable(subscriber => {\n        function handler(e) {\n            if (arguments.length > 1) {\n                subscriber.next(Array.prototype.slice.call(arguments));\n            }\n            else {\n                subscriber.next(e);\n            }\n        }\n        setupSubscription(target, eventName, handler, subscriber, options);\n    });\n}\nfunction setupSubscription(sourceObj, eventName, handler, subscriber, options) {\n    let unsubscribe;\n    if (isEventTarget(sourceObj)) {\n        const source = sourceObj;\n        sourceObj.addEventListener(eventName, handler, options);\n        unsubscribe = () => source.removeEventListener(eventName, handler, options);\n    }\n    else if (isJQueryStyleEventEmitter(sourceObj)) {\n        const source = sourceObj;\n        sourceObj.on(eventName, handler);\n        unsubscribe = () => source.off(eventName, handler);\n    }\n    else if (isNodeStyleEventEmitter(sourceObj)) {\n        const source = sourceObj;\n        sourceObj.addListener(eventName, handler);\n        unsubscribe = () => source.removeListener(eventName, handler);\n    }\n    else if (sourceObj && sourceObj.length) {\n        for (let i = 0, len = sourceObj.length; i < len; i++) {\n            setupSubscription(sourceObj[i], eventName, handler, subscriber, options);\n        }\n    }\n    else {\n        throw new TypeError('Invalid event target');\n    }\n    subscriber.add(unsubscribe);\n}\nfunction isNodeStyleEventEmitter(sourceObj) {\n    return sourceObj && typeof sourceObj.addListener === 'function' && typeof sourceObj.removeListener === 'function';\n}\nfunction isJQueryStyleEventEmitter(sourceObj) {\n    return sourceObj && typeof sourceObj.on === 'function' && typeof sourceObj.off === 'function';\n}\nfunction isEventTarget(sourceObj) {\n    return sourceObj && typeof sourceObj.addEventListener === 'function' && typeof sourceObj.removeEventListener === 'function';\n}\n//# sourceMappingURL=fromEvent.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar operators_1 = require(\"rxjs/operators\");\n/**\n * Projects each source value to the same Observable which is merged multiple\n * times in the output Observable.\n *\n * <span class=\"informal\">It's like {@link mergeMap}, but maps each value always\n * to the same inner Observable.</span>\n *\n * <img src=\"./img/mergeMapTo.png\" width=\"100%\">\n *\n * Maps each source value to the given Observable `innerObservable` regardless\n * of the source value, and then merges those resulting Observables into one\n * single Observable, which is the output Observable.\n *\n * @example <caption>For each click event, start an interval Observable ticking every 1 second</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.mergeMapTo(Rx.Observable.interval(1000));\n * result.subscribe(x => console.log(x));\n *\n * @see {@link concatMapTo}\n * @see {@link merge}\n * @see {@link mergeAll}\n * @see {@link mergeMap}\n * @see {@link mergeScan}\n * @see {@link switchMapTo}\n *\n * @param {ObservableInput} innerObservable An Observable to replace each value from\n * the source Observable.\n * @param {number} [concurrent=Number.POSITIVE_INFINITY] Maximum number of input\n * Observables being subscribed to concurrently.\n * @return {Observable} An Observable that emits items from the given\n * `innerObservable`.\n * @method mergeMapTo\n * @owner Observable\n */\nfunction mergeMapTo(innerObservable, concurrent) {\n    if (concurrent === void 0) { concurrent = Number.POSITIVE_INFINITY; }\n    return operators_1.mergeMapTo(innerObservable, concurrent)(this);\n}\nexports.mergeMapTo = mergeMapTo;\n//# sourceMappingURL=mergeMapTo.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Version} from '@angular/core';\n\n/** Current version of the Angular Component Development Kit. */\nexport const VERSION = new Version('10.2.3');\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './version';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './public-api';\n","import { Observable } from '../Observable';\nimport { subscribeToArray } from '../util/subscribeToArray';\nimport { scheduleArray } from '../scheduled/scheduleArray';\nexport function fromArray(input, scheduler) {\n    if (!scheduler) {\n        return new Observable(subscribeToArray(input));\n    }\n    else {\n        return scheduleArray(input, scheduler);\n    }\n}\n//# sourceMappingURL=fromArray.js.map","import { reduce } from './reduce';\nexport function max(comparer) {\n    const max = (typeof comparer === 'function')\n        ? (x, y) => comparer(x, y) > 0 ? x : y\n        : (x, y) => x > y ? x : y;\n    return reduce(max);\n}\n//# sourceMappingURL=max.js.map","/*! Hammer.JS - v2.0.7 - 2016-04-22\n * http://hammerjs.github.io/\n *\n * Copyright (c) 2016 Jorik Tangelder;\n * Licensed under the MIT license */\n(function(window, document, exportName, undefined) {\n  'use strict';\n\nvar VENDOR_PREFIXES = ['', 'webkit', 'Moz', 'MS', 'ms', 'o'];\nvar TEST_ELEMENT = document.createElement('div');\n\nvar TYPE_FUNCTION = 'function';\n\nvar round = Math.round;\nvar abs = Math.abs;\nvar now = Date.now;\n\n/**\n * set a timeout with a given scope\n * @param {Function} fn\n * @param {Number} timeout\n * @param {Object} context\n * @returns {number}\n */\nfunction setTimeoutContext(fn, timeout, context) {\n    return setTimeout(bindFn(fn, context), timeout);\n}\n\n/**\n * if the argument is an array, we want to execute the fn on each entry\n * if it aint an array we don't want to do a thing.\n * this is used by all the methods that accept a single and array argument.\n * @param {*|Array} arg\n * @param {String} fn\n * @param {Object} [context]\n * @returns {Boolean}\n */\nfunction invokeArrayArg(arg, fn, context) {\n    if (Array.isArray(arg)) {\n        each(arg, context[fn], context);\n        return true;\n    }\n    return false;\n}\n\n/**\n * walk objects and arrays\n * @param {Object} obj\n * @param {Function} iterator\n * @param {Object} context\n */\nfunction each(obj, iterator, context) {\n    var i;\n\n    if (!obj) {\n        return;\n    }\n\n    if (obj.forEach) {\n        obj.forEach(iterator, context);\n    } else if (obj.length !== undefined) {\n        i = 0;\n        while (i < obj.length) {\n            iterator.call(context, obj[i], i, obj);\n            i++;\n        }\n    } else {\n        for (i in obj) {\n            obj.hasOwnProperty(i) && iterator.call(context, obj[i], i, obj);\n        }\n    }\n}\n\n/**\n * wrap a method with a deprecation warning and stack trace\n * @param {Function} method\n * @param {String} name\n * @param {String} message\n * @returns {Function} A new function wrapping the supplied method.\n */\nfunction deprecate(method, name, message) {\n    var deprecationMessage = 'DEPRECATED METHOD: ' + name + '\\n' + message + ' AT \\n';\n    return function() {\n        var e = new Error('get-stack-trace');\n        var stack = e && e.stack ? e.stack.replace(/^[^\\(]+?[\\n$]/gm, '')\n            .replace(/^\\s+at\\s+/gm, '')\n            .replace(/^Object.<anonymous>\\s*\\(/gm, '{anonymous}()@') : 'Unknown Stack Trace';\n\n        var log = window.console && (window.console.warn || window.console.log);\n        if (log) {\n            log.call(window.console, deprecationMessage, stack);\n        }\n        return method.apply(this, arguments);\n    };\n}\n\n/**\n * extend object.\n * means that properties in dest will be overwritten by the ones in src.\n * @param {Object} target\n * @param {...Object} objects_to_assign\n * @returns {Object} target\n */\nvar assign;\nif (typeof Object.assign !== 'function') {\n    assign = function assign(target) {\n        if (target === undefined || target === null) {\n            throw new TypeError('Cannot convert undefined or null to object');\n        }\n\n        var output = Object(target);\n        for (var index = 1; index < arguments.length; index++) {\n            var source = arguments[index];\n            if (source !== undefined && source !== null) {\n                for (var nextKey in source) {\n                    if (source.hasOwnProperty(nextKey)) {\n                        output[nextKey] = source[nextKey];\n                    }\n                }\n            }\n        }\n        return output;\n    };\n} else {\n    assign = Object.assign;\n}\n\n/**\n * extend object.\n * means that properties in dest will be overwritten by the ones in src.\n * @param {Object} dest\n * @param {Object} src\n * @param {Boolean} [merge=false]\n * @returns {Object} dest\n */\nvar extend = deprecate(function extend(dest, src, merge) {\n    var keys = Object.keys(src);\n    var i = 0;\n    while (i < keys.length) {\n        if (!merge || (merge && dest[keys[i]] === undefined)) {\n            dest[keys[i]] = src[keys[i]];\n        }\n        i++;\n    }\n    return dest;\n}, 'extend', 'Use `assign`.');\n\n/**\n * merge the values from src in the dest.\n * means that properties that exist in dest will not be overwritten by src\n * @param {Object} dest\n * @param {Object} src\n * @returns {Object} dest\n */\nvar merge = deprecate(function merge(dest, src) {\n    return extend(dest, src, true);\n}, 'merge', 'Use `assign`.');\n\n/**\n * simple class inheritance\n * @param {Function} child\n * @param {Function} base\n * @param {Object} [properties]\n */\nfunction inherit(child, base, properties) {\n    var baseP = base.prototype,\n        childP;\n\n    childP = child.prototype = Object.create(baseP);\n    childP.constructor = child;\n    childP._super = baseP;\n\n    if (properties) {\n        assign(childP, properties);\n    }\n}\n\n/**\n * simple function bind\n * @param {Function} fn\n * @param {Object} context\n * @returns {Function}\n */\nfunction bindFn(fn, context) {\n    return function boundFn() {\n        return fn.apply(context, arguments);\n    };\n}\n\n/**\n * let a boolean value also be a function that must return a boolean\n * this first item in args will be used as the context\n * @param {Boolean|Function} val\n * @param {Array} [args]\n * @returns {Boolean}\n */\nfunction boolOrFn(val, args) {\n    if (typeof val == TYPE_FUNCTION) {\n        return val.apply(args ? args[0] || undefined : undefined, args);\n    }\n    return val;\n}\n\n/**\n * use the val2 when val1 is undefined\n * @param {*} val1\n * @param {*} val2\n * @returns {*}\n */\nfunction ifUndefined(val1, val2) {\n    return (val1 === undefined) ? val2 : val1;\n}\n\n/**\n * addEventListener with multiple events at once\n * @param {EventTarget} target\n * @param {String} types\n * @param {Function} handler\n */\nfunction addEventListeners(target, types, handler) {\n    each(splitStr(types), function(type) {\n        target.addEventListener(type, handler, false);\n    });\n}\n\n/**\n * removeEventListener with multiple events at once\n * @param {EventTarget} target\n * @param {String} types\n * @param {Function} handler\n */\nfunction removeEventListeners(target, types, handler) {\n    each(splitStr(types), function(type) {\n        target.removeEventListener(type, handler, false);\n    });\n}\n\n/**\n * find if a node is in the given parent\n * @method hasParent\n * @param {HTMLElement} node\n * @param {HTMLElement} parent\n * @return {Boolean} found\n */\nfunction hasParent(node, parent) {\n    while (node) {\n        if (node == parent) {\n            return true;\n        }\n        node = node.parentNode;\n    }\n    return false;\n}\n\n/**\n * small indexOf wrapper\n * @param {String} str\n * @param {String} find\n * @returns {Boolean} found\n */\nfunction inStr(str, find) {\n    return str.indexOf(find) > -1;\n}\n\n/**\n * split string on whitespace\n * @param {String} str\n * @returns {Array} words\n */\nfunction splitStr(str) {\n    return str.trim().split(/\\s+/g);\n}\n\n/**\n * find if a array contains the object using indexOf or a simple polyFill\n * @param {Array} src\n * @param {String} find\n * @param {String} [findByKey]\n * @return {Boolean|Number} false when not found, or the index\n */\nfunction inArray(src, find, findByKey) {\n    if (src.indexOf && !findByKey) {\n        return src.indexOf(find);\n    } else {\n        var i = 0;\n        while (i < src.length) {\n            if ((findByKey && src[i][findByKey] == find) || (!findByKey && src[i] === find)) {\n                return i;\n            }\n            i++;\n        }\n        return -1;\n    }\n}\n\n/**\n * convert array-like objects to real arrays\n * @param {Object} obj\n * @returns {Array}\n */\nfunction toArray(obj) {\n    return Array.prototype.slice.call(obj, 0);\n}\n\n/**\n * unique array with objects based on a key (like 'id') or just by the array's value\n * @param {Array} src [{id:1},{id:2},{id:1}]\n * @param {String} [key]\n * @param {Boolean} [sort=False]\n * @returns {Array} [{id:1},{id:2}]\n */\nfunction uniqueArray(src, key, sort) {\n    var results = [];\n    var values = [];\n    var i = 0;\n\n    while (i < src.length) {\n        var val = key ? src[i][key] : src[i];\n        if (inArray(values, val) < 0) {\n            results.push(src[i]);\n        }\n        values[i] = val;\n        i++;\n    }\n\n    if (sort) {\n        if (!key) {\n            results = results.sort();\n        } else {\n            results = results.sort(function sortUniqueArray(a, b) {\n                return a[key] > b[key];\n            });\n        }\n    }\n\n    return results;\n}\n\n/**\n * get the prefixed property\n * @param {Object} obj\n * @param {String} property\n * @returns {String|Undefined} prefixed\n */\nfunction prefixed(obj, property) {\n    var prefix, prop;\n    var camelProp = property[0].toUpperCase() + property.slice(1);\n\n    var i = 0;\n    while (i < VENDOR_PREFIXES.length) {\n        prefix = VENDOR_PREFIXES[i];\n        prop = (prefix) ? prefix + camelProp : property;\n\n        if (prop in obj) {\n            return prop;\n        }\n        i++;\n    }\n    return undefined;\n}\n\n/**\n * get a unique id\n * @returns {number} uniqueId\n */\nvar _uniqueId = 1;\nfunction uniqueId() {\n    return _uniqueId++;\n}\n\n/**\n * get the window object of an element\n * @param {HTMLElement} element\n * @returns {DocumentView|Window}\n */\nfunction getWindowForElement(element) {\n    var doc = element.ownerDocument || element;\n    return (doc.defaultView || doc.parentWindow || window);\n}\n\nvar MOBILE_REGEX = /mobile|tablet|ip(ad|hone|od)|android/i;\n\nvar SUPPORT_TOUCH = ('ontouchstart' in window);\nvar SUPPORT_POINTER_EVENTS = prefixed(window, 'PointerEvent') !== undefined;\nvar SUPPORT_ONLY_TOUCH = SUPPORT_TOUCH && MOBILE_REGEX.test(navigator.userAgent);\n\nvar INPUT_TYPE_TOUCH = 'touch';\nvar INPUT_TYPE_PEN = 'pen';\nvar INPUT_TYPE_MOUSE = 'mouse';\nvar INPUT_TYPE_KINECT = 'kinect';\n\nvar COMPUTE_INTERVAL = 25;\n\nvar INPUT_START = 1;\nvar INPUT_MOVE = 2;\nvar INPUT_END = 4;\nvar INPUT_CANCEL = 8;\n\nvar DIRECTION_NONE = 1;\nvar DIRECTION_LEFT = 2;\nvar DIRECTION_RIGHT = 4;\nvar DIRECTION_UP = 8;\nvar DIRECTION_DOWN = 16;\n\nvar DIRECTION_HORIZONTAL = DIRECTION_LEFT | DIRECTION_RIGHT;\nvar DIRECTION_VERTICAL = DIRECTION_UP | DIRECTION_DOWN;\nvar DIRECTION_ALL = DIRECTION_HORIZONTAL | DIRECTION_VERTICAL;\n\nvar PROPS_XY = ['x', 'y'];\nvar PROPS_CLIENT_XY = ['clientX', 'clientY'];\n\n/**\n * create new input type manager\n * @param {Manager} manager\n * @param {Function} callback\n * @returns {Input}\n * @constructor\n */\nfunction Input(manager, callback) {\n    var self = this;\n    this.manager = manager;\n    this.callback = callback;\n    this.element = manager.element;\n    this.target = manager.options.inputTarget;\n\n    // smaller wrapper around the handler, for the scope and the enabled state of the manager,\n    // so when disabled the input events are completely bypassed.\n    this.domHandler = function(ev) {\n        if (boolOrFn(manager.options.enable, [manager])) {\n            self.handler(ev);\n        }\n    };\n\n    this.init();\n\n}\n\nInput.prototype = {\n    /**\n     * should handle the inputEvent data and trigger the callback\n     * @virtual\n     */\n    handler: function() { },\n\n    /**\n     * bind the events\n     */\n    init: function() {\n        this.evEl && addEventListeners(this.element, this.evEl, this.domHandler);\n        this.evTarget && addEventListeners(this.target, this.evTarget, this.domHandler);\n        this.evWin && addEventListeners(getWindowForElement(this.element), this.evWin, this.domHandler);\n    },\n\n    /**\n     * unbind the events\n     */\n    destroy: function() {\n        this.evEl && removeEventListeners(this.element, this.evEl, this.domHandler);\n        this.evTarget && removeEventListeners(this.target, this.evTarget, this.domHandler);\n        this.evWin && removeEventListeners(getWindowForElement(this.element), this.evWin, this.domHandler);\n    }\n};\n\n/**\n * create new input type manager\n * called by the Manager constructor\n * @param {Hammer} manager\n * @returns {Input}\n */\nfunction createInputInstance(manager) {\n    var Type;\n    var inputClass = manager.options.inputClass;\n\n    if (inputClass) {\n        Type = inputClass;\n    } else if (SUPPORT_POINTER_EVENTS) {\n        Type = PointerEventInput;\n    } else if (SUPPORT_ONLY_TOUCH) {\n        Type = TouchInput;\n    } else if (!SUPPORT_TOUCH) {\n        Type = MouseInput;\n    } else {\n        Type = TouchMouseInput;\n    }\n    return new (Type)(manager, inputHandler);\n}\n\n/**\n * handle input events\n * @param {Manager} manager\n * @param {String} eventType\n * @param {Object} input\n */\nfunction inputHandler(manager, eventType, input) {\n    var pointersLen = input.pointers.length;\n    var changedPointersLen = input.changedPointers.length;\n    var isFirst = (eventType & INPUT_START && (pointersLen - changedPointersLen === 0));\n    var isFinal = (eventType & (INPUT_END | INPUT_CANCEL) && (pointersLen - changedPointersLen === 0));\n\n    input.isFirst = !!isFirst;\n    input.isFinal = !!isFinal;\n\n    if (isFirst) {\n        manager.session = {};\n    }\n\n    // source event is the normalized value of the domEvents\n    // like 'touchstart, mouseup, pointerdown'\n    input.eventType = eventType;\n\n    // compute scale, rotation etc\n    computeInputData(manager, input);\n\n    // emit secret event\n    manager.emit('hammer.input', input);\n\n    manager.recognize(input);\n    manager.session.prevInput = input;\n}\n\n/**\n * extend the data with some usable properties like scale, rotate, velocity etc\n * @param {Object} manager\n * @param {Object} input\n */\nfunction computeInputData(manager, input) {\n    var session = manager.session;\n    var pointers = input.pointers;\n    var pointersLength = pointers.length;\n\n    // store the first input to calculate the distance and direction\n    if (!session.firstInput) {\n        session.firstInput = simpleCloneInputData(input);\n    }\n\n    // to compute scale and rotation we need to store the multiple touches\n    if (pointersLength > 1 && !session.firstMultiple) {\n        session.firstMultiple = simpleCloneInputData(input);\n    } else if (pointersLength === 1) {\n        session.firstMultiple = false;\n    }\n\n    var firstInput = session.firstInput;\n    var firstMultiple = session.firstMultiple;\n    var offsetCenter = firstMultiple ? firstMultiple.center : firstInput.center;\n\n    var center = input.center = getCenter(pointers);\n    input.timeStamp = now();\n    input.deltaTime = input.timeStamp - firstInput.timeStamp;\n\n    input.angle = getAngle(offsetCenter, center);\n    input.distance = getDistance(offsetCenter, center);\n\n    computeDeltaXY(session, input);\n    input.offsetDirection = getDirection(input.deltaX, input.deltaY);\n\n    var overallVelocity = getVelocity(input.deltaTime, input.deltaX, input.deltaY);\n    input.overallVelocityX = overallVelocity.x;\n    input.overallVelocityY = overallVelocity.y;\n    input.overallVelocity = (abs(overallVelocity.x) > abs(overallVelocity.y)) ? overallVelocity.x : overallVelocity.y;\n\n    input.scale = firstMultiple ? getScale(firstMultiple.pointers, pointers) : 1;\n    input.rotation = firstMultiple ? getRotation(firstMultiple.pointers, pointers) : 0;\n\n    input.maxPointers = !session.prevInput ? input.pointers.length : ((input.pointers.length >\n        session.prevInput.maxPointers) ? input.pointers.length : session.prevInput.maxPointers);\n\n    computeIntervalInputData(session, input);\n\n    // find the correct target\n    var target = manager.element;\n    if (hasParent(input.srcEvent.target, target)) {\n        target = input.srcEvent.target;\n    }\n    input.target = target;\n}\n\nfunction computeDeltaXY(session, input) {\n    var center = input.center;\n    var offset = session.offsetDelta || {};\n    var prevDelta = session.prevDelta || {};\n    var prevInput = session.prevInput || {};\n\n    if (input.eventType === INPUT_START || prevInput.eventType === INPUT_END) {\n        prevDelta = session.prevDelta = {\n            x: prevInput.deltaX || 0,\n            y: prevInput.deltaY || 0\n        };\n\n        offset = session.offsetDelta = {\n            x: center.x,\n            y: center.y\n        };\n    }\n\n    input.deltaX = prevDelta.x + (center.x - offset.x);\n    input.deltaY = prevDelta.y + (center.y - offset.y);\n}\n\n/**\n * velocity is calculated every x ms\n * @param {Object} session\n * @param {Object} input\n */\nfunction computeIntervalInputData(session, input) {\n    var last = session.lastInterval || input,\n        deltaTime = input.timeStamp - last.timeStamp,\n        velocity, velocityX, velocityY, direction;\n\n    if (input.eventType != INPUT_CANCEL && (deltaTime > COMPUTE_INTERVAL || last.velocity === undefined)) {\n        var deltaX = input.deltaX - last.deltaX;\n        var deltaY = input.deltaY - last.deltaY;\n\n        var v = getVelocity(deltaTime, deltaX, deltaY);\n        velocityX = v.x;\n        velocityY = v.y;\n        velocity = (abs(v.x) > abs(v.y)) ? v.x : v.y;\n        direction = getDirection(deltaX, deltaY);\n\n        session.lastInterval = input;\n    } else {\n        // use latest velocity info if it doesn't overtake a minimum period\n        velocity = last.velocity;\n        velocityX = last.velocityX;\n        velocityY = last.velocityY;\n        direction = last.direction;\n    }\n\n    input.velocity = velocity;\n    input.velocityX = velocityX;\n    input.velocityY = velocityY;\n    input.direction = direction;\n}\n\n/**\n * create a simple clone from the input used for storage of firstInput and firstMultiple\n * @param {Object} input\n * @returns {Object} clonedInputData\n */\nfunction simpleCloneInputData(input) {\n    // make a simple copy of the pointers because we will get a reference if we don't\n    // we only need clientXY for the calculations\n    var pointers = [];\n    var i = 0;\n    while (i < input.pointers.length) {\n        pointers[i] = {\n            clientX: round(input.pointers[i].clientX),\n            clientY: round(input.pointers[i].clientY)\n        };\n        i++;\n    }\n\n    return {\n        timeStamp: now(),\n        pointers: pointers,\n        center: getCenter(pointers),\n        deltaX: input.deltaX,\n        deltaY: input.deltaY\n    };\n}\n\n/**\n * get the center of all the pointers\n * @param {Array} pointers\n * @return {Object} center contains `x` and `y` properties\n */\nfunction getCenter(pointers) {\n    var pointersLength = pointers.length;\n\n    // no need to loop when only one touch\n    if (pointersLength === 1) {\n        return {\n            x: round(pointers[0].clientX),\n            y: round(pointers[0].clientY)\n        };\n    }\n\n    var x = 0, y = 0, i = 0;\n    while (i < pointersLength) {\n        x += pointers[i].clientX;\n        y += pointers[i].clientY;\n        i++;\n    }\n\n    return {\n        x: round(x / pointersLength),\n        y: round(y / pointersLength)\n    };\n}\n\n/**\n * calculate the velocity between two points. unit is in px per ms.\n * @param {Number} deltaTime\n * @param {Number} x\n * @param {Number} y\n * @return {Object} velocity `x` and `y`\n */\nfunction getVelocity(deltaTime, x, y) {\n    return {\n        x: x / deltaTime || 0,\n        y: y / deltaTime || 0\n    };\n}\n\n/**\n * get the direction between two points\n * @param {Number} x\n * @param {Number} y\n * @return {Number} direction\n */\nfunction getDirection(x, y) {\n    if (x === y) {\n        return DIRECTION_NONE;\n    }\n\n    if (abs(x) >= abs(y)) {\n        return x < 0 ? DIRECTION_LEFT : DIRECTION_RIGHT;\n    }\n    return y < 0 ? DIRECTION_UP : DIRECTION_DOWN;\n}\n\n/**\n * calculate the absolute distance between two points\n * @param {Object} p1 {x, y}\n * @param {Object} p2 {x, y}\n * @param {Array} [props] containing x and y keys\n * @return {Number} distance\n */\nfunction getDistance(p1, p2, props) {\n    if (!props) {\n        props = PROPS_XY;\n    }\n    var x = p2[props[0]] - p1[props[0]],\n        y = p2[props[1]] - p1[props[1]];\n\n    return Math.sqrt((x * x) + (y * y));\n}\n\n/**\n * calculate the angle between two coordinates\n * @param {Object} p1\n * @param {Object} p2\n * @param {Array} [props] containing x and y keys\n * @return {Number} angle\n */\nfunction getAngle(p1, p2, props) {\n    if (!props) {\n        props = PROPS_XY;\n    }\n    var x = p2[props[0]] - p1[props[0]],\n        y = p2[props[1]] - p1[props[1]];\n    return Math.atan2(y, x) * 180 / Math.PI;\n}\n\n/**\n * calculate the rotation degrees between two pointersets\n * @param {Array} start array of pointers\n * @param {Array} end array of pointers\n * @return {Number} rotation\n */\nfunction getRotation(start, end) {\n    return getAngle(end[1], end[0], PROPS_CLIENT_XY) + getAngle(start[1], start[0], PROPS_CLIENT_XY);\n}\n\n/**\n * calculate the scale factor between two pointersets\n * no scale is 1, and goes down to 0 when pinched together, and bigger when pinched out\n * @param {Array} start array of pointers\n * @param {Array} end array of pointers\n * @return {Number} scale\n */\nfunction getScale(start, end) {\n    return getDistance(end[0], end[1], PROPS_CLIENT_XY) / getDistance(start[0], start[1], PROPS_CLIENT_XY);\n}\n\nvar MOUSE_INPUT_MAP = {\n    mousedown: INPUT_START,\n    mousemove: INPUT_MOVE,\n    mouseup: INPUT_END\n};\n\nvar MOUSE_ELEMENT_EVENTS = 'mousedown';\nvar MOUSE_WINDOW_EVENTS = 'mousemove mouseup';\n\n/**\n * Mouse events input\n * @constructor\n * @extends Input\n */\nfunction MouseInput() {\n    this.evEl = MOUSE_ELEMENT_EVENTS;\n    this.evWin = MOUSE_WINDOW_EVENTS;\n\n    this.pressed = false; // mousedown state\n\n    Input.apply(this, arguments);\n}\n\ninherit(MouseInput, Input, {\n    /**\n     * handle mouse events\n     * @param {Object} ev\n     */\n    handler: function MEhandler(ev) {\n        var eventType = MOUSE_INPUT_MAP[ev.type];\n\n        // on start we want to have the left mouse button down\n        if (eventType & INPUT_START && ev.button === 0) {\n            this.pressed = true;\n        }\n\n        if (eventType & INPUT_MOVE && ev.which !== 1) {\n            eventType = INPUT_END;\n        }\n\n        // mouse must be down\n        if (!this.pressed) {\n            return;\n        }\n\n        if (eventType & INPUT_END) {\n            this.pressed = false;\n        }\n\n        this.callback(this.manager, eventType, {\n            pointers: [ev],\n            changedPointers: [ev],\n            pointerType: INPUT_TYPE_MOUSE,\n            srcEvent: ev\n        });\n    }\n});\n\nvar POINTER_INPUT_MAP = {\n    pointerdown: INPUT_START,\n    pointermove: INPUT_MOVE,\n    pointerup: INPUT_END,\n    pointercancel: INPUT_CANCEL,\n    pointerout: INPUT_CANCEL\n};\n\n// in IE10 the pointer types is defined as an enum\nvar IE10_POINTER_TYPE_ENUM = {\n    2: INPUT_TYPE_TOUCH,\n    3: INPUT_TYPE_PEN,\n    4: INPUT_TYPE_MOUSE,\n    5: INPUT_TYPE_KINECT // see https://twitter.com/jacobrossi/status/480596438489890816\n};\n\nvar POINTER_ELEMENT_EVENTS = 'pointerdown';\nvar POINTER_WINDOW_EVENTS = 'pointermove pointerup pointercancel';\n\n// IE10 has prefixed support, and case-sensitive\nif (window.MSPointerEvent && !window.PointerEvent) {\n    POINTER_ELEMENT_EVENTS = 'MSPointerDown';\n    POINTER_WINDOW_EVENTS = 'MSPointerMove MSPointerUp MSPointerCancel';\n}\n\n/**\n * Pointer events input\n * @constructor\n * @extends Input\n */\nfunction PointerEventInput() {\n    this.evEl = POINTER_ELEMENT_EVENTS;\n    this.evWin = POINTER_WINDOW_EVENTS;\n\n    Input.apply(this, arguments);\n\n    this.store = (this.manager.session.pointerEvents = []);\n}\n\ninherit(PointerEventInput, Input, {\n    /**\n     * handle mouse events\n     * @param {Object} ev\n     */\n    handler: function PEhandler(ev) {\n        var store = this.store;\n        var removePointer = false;\n\n        var eventTypeNormalized = ev.type.toLowerCase().replace('ms', '');\n        var eventType = POINTER_INPUT_MAP[eventTypeNormalized];\n        var pointerType = IE10_POINTER_TYPE_ENUM[ev.pointerType] || ev.pointerType;\n\n        var isTouch = (pointerType == INPUT_TYPE_TOUCH);\n\n        // get index of the event in the store\n        var storeIndex = inArray(store, ev.pointerId, 'pointerId');\n\n        // start and mouse must be down\n        if (eventType & INPUT_START && (ev.button === 0 || isTouch)) {\n            if (storeIndex < 0) {\n                store.push(ev);\n                storeIndex = store.length - 1;\n            }\n        } else if (eventType & (INPUT_END | INPUT_CANCEL)) {\n            removePointer = true;\n        }\n\n        // it not found, so the pointer hasn't been down (so it's probably a hover)\n        if (storeIndex < 0) {\n            return;\n        }\n\n        // update the event in the store\n        store[storeIndex] = ev;\n\n        this.callback(this.manager, eventType, {\n            pointers: store,\n            changedPointers: [ev],\n            pointerType: pointerType,\n            srcEvent: ev\n        });\n\n        if (removePointer) {\n            // remove from the store\n            store.splice(storeIndex, 1);\n        }\n    }\n});\n\nvar SINGLE_TOUCH_INPUT_MAP = {\n    touchstart: INPUT_START,\n    touchmove: INPUT_MOVE,\n    touchend: INPUT_END,\n    touchcancel: INPUT_CANCEL\n};\n\nvar SINGLE_TOUCH_TARGET_EVENTS = 'touchstart';\nvar SINGLE_TOUCH_WINDOW_EVENTS = 'touchstart touchmove touchend touchcancel';\n\n/**\n * Touch events input\n * @constructor\n * @extends Input\n */\nfunction SingleTouchInput() {\n    this.evTarget = SINGLE_TOUCH_TARGET_EVENTS;\n    this.evWin = SINGLE_TOUCH_WINDOW_EVENTS;\n    this.started = false;\n\n    Input.apply(this, arguments);\n}\n\ninherit(SingleTouchInput, Input, {\n    handler: function TEhandler(ev) {\n        var type = SINGLE_TOUCH_INPUT_MAP[ev.type];\n\n        // should we handle the touch events?\n        if (type === INPUT_START) {\n            this.started = true;\n        }\n\n        if (!this.started) {\n            return;\n        }\n\n        var touches = normalizeSingleTouches.call(this, ev, type);\n\n        // when done, reset the started state\n        if (type & (INPUT_END | INPUT_CANCEL) && touches[0].length - touches[1].length === 0) {\n            this.started = false;\n        }\n\n        this.callback(this.manager, type, {\n            pointers: touches[0],\n            changedPointers: touches[1],\n            pointerType: INPUT_TYPE_TOUCH,\n            srcEvent: ev\n        });\n    }\n});\n\n/**\n * @this {TouchInput}\n * @param {Object} ev\n * @param {Number} type flag\n * @returns {undefined|Array} [all, changed]\n */\nfunction normalizeSingleTouches(ev, type) {\n    var all = toArray(ev.touches);\n    var changed = toArray(ev.changedTouches);\n\n    if (type & (INPUT_END | INPUT_CANCEL)) {\n        all = uniqueArray(all.concat(changed), 'identifier', true);\n    }\n\n    return [all, changed];\n}\n\nvar TOUCH_INPUT_MAP = {\n    touchstart: INPUT_START,\n    touchmove: INPUT_MOVE,\n    touchend: INPUT_END,\n    touchcancel: INPUT_CANCEL\n};\n\nvar TOUCH_TARGET_EVENTS = 'touchstart touchmove touchend touchcancel';\n\n/**\n * Multi-user touch events input\n * @constructor\n * @extends Input\n */\nfunction TouchInput() {\n    this.evTarget = TOUCH_TARGET_EVENTS;\n    this.targetIds = {};\n\n    Input.apply(this, arguments);\n}\n\ninherit(TouchInput, Input, {\n    handler: function MTEhandler(ev) {\n        var type = TOUCH_INPUT_MAP[ev.type];\n        var touches = getTouches.call(this, ev, type);\n        if (!touches) {\n            return;\n        }\n\n        this.callback(this.manager, type, {\n            pointers: touches[0],\n            changedPointers: touches[1],\n            pointerType: INPUT_TYPE_TOUCH,\n            srcEvent: ev\n        });\n    }\n});\n\n/**\n * @this {TouchInput}\n * @param {Object} ev\n * @param {Number} type flag\n * @returns {undefined|Array} [all, changed]\n */\nfunction getTouches(ev, type) {\n    var allTouches = toArray(ev.touches);\n    var targetIds = this.targetIds;\n\n    // when there is only one touch, the process can be simplified\n    if (type & (INPUT_START | INPUT_MOVE) && allTouches.length === 1) {\n        targetIds[allTouches[0].identifier] = true;\n        return [allTouches, allTouches];\n    }\n\n    var i,\n        targetTouches,\n        changedTouches = toArray(ev.changedTouches),\n        changedTargetTouches = [],\n        target = this.target;\n\n    // get target touches from touches\n    targetTouches = allTouches.filter(function(touch) {\n        return hasParent(touch.target, target);\n    });\n\n    // collect touches\n    if (type === INPUT_START) {\n        i = 0;\n        while (i < targetTouches.length) {\n            targetIds[targetTouches[i].identifier] = true;\n            i++;\n        }\n    }\n\n    // filter changed touches to only contain touches that exist in the collected target ids\n    i = 0;\n    while (i < changedTouches.length) {\n        if (targetIds[changedTouches[i].identifier]) {\n            changedTargetTouches.push(changedTouches[i]);\n        }\n\n        // cleanup removed touches\n        if (type & (INPUT_END | INPUT_CANCEL)) {\n            delete targetIds[changedTouches[i].identifier];\n        }\n        i++;\n    }\n\n    if (!changedTargetTouches.length) {\n        return;\n    }\n\n    return [\n        // merge targetTouches with changedTargetTouches so it contains ALL touches, including 'end' and 'cancel'\n        uniqueArray(targetTouches.concat(changedTargetTouches), 'identifier', true),\n        changedTargetTouches\n    ];\n}\n\n/**\n * Combined touch and mouse input\n *\n * Touch has a higher priority then mouse, and while touching no mouse events are allowed.\n * This because touch devices also emit mouse events while doing a touch.\n *\n * @constructor\n * @extends Input\n */\n\nvar DEDUP_TIMEOUT = 2500;\nvar DEDUP_DISTANCE = 25;\n\nfunction TouchMouseInput() {\n    Input.apply(this, arguments);\n\n    var handler = bindFn(this.handler, this);\n    this.touch = new TouchInput(this.manager, handler);\n    this.mouse = new MouseInput(this.manager, handler);\n\n    this.primaryTouch = null;\n    this.lastTouches = [];\n}\n\ninherit(TouchMouseInput, Input, {\n    /**\n     * handle mouse and touch events\n     * @param {Hammer} manager\n     * @param {String} inputEvent\n     * @param {Object} inputData\n     */\n    handler: function TMEhandler(manager, inputEvent, inputData) {\n        var isTouch = (inputData.pointerType == INPUT_TYPE_TOUCH),\n            isMouse = (inputData.pointerType == INPUT_TYPE_MOUSE);\n\n        if (isMouse && inputData.sourceCapabilities && inputData.sourceCapabilities.firesTouchEvents) {\n            return;\n        }\n\n        // when we're in a touch event, record touches to  de-dupe synthetic mouse event\n        if (isTouch) {\n            recordTouches.call(this, inputEvent, inputData);\n        } else if (isMouse && isSyntheticEvent.call(this, inputData)) {\n            return;\n        }\n\n        this.callback(manager, inputEvent, inputData);\n    },\n\n    /**\n     * remove the event listeners\n     */\n    destroy: function destroy() {\n        this.touch.destroy();\n        this.mouse.destroy();\n    }\n});\n\nfunction recordTouches(eventType, eventData) {\n    if (eventType & INPUT_START) {\n        this.primaryTouch = eventData.changedPointers[0].identifier;\n        setLastTouch.call(this, eventData);\n    } else if (eventType & (INPUT_END | INPUT_CANCEL)) {\n        setLastTouch.call(this, eventData);\n    }\n}\n\nfunction setLastTouch(eventData) {\n    var touch = eventData.changedPointers[0];\n\n    if (touch.identifier === this.primaryTouch) {\n        var lastTouch = {x: touch.clientX, y: touch.clientY};\n        this.lastTouches.push(lastTouch);\n        var lts = this.lastTouches;\n        var removeLastTouch = function() {\n            var i = lts.indexOf(lastTouch);\n            if (i > -1) {\n                lts.splice(i, 1);\n            }\n        };\n        setTimeout(removeLastTouch, DEDUP_TIMEOUT);\n    }\n}\n\nfunction isSyntheticEvent(eventData) {\n    var x = eventData.srcEvent.clientX, y = eventData.srcEvent.clientY;\n    for (var i = 0; i < this.lastTouches.length; i++) {\n        var t = this.lastTouches[i];\n        var dx = Math.abs(x - t.x), dy = Math.abs(y - t.y);\n        if (dx <= DEDUP_DISTANCE && dy <= DEDUP_DISTANCE) {\n            return true;\n        }\n    }\n    return false;\n}\n\nvar PREFIXED_TOUCH_ACTION = prefixed(TEST_ELEMENT.style, 'touchAction');\nvar NATIVE_TOUCH_ACTION = PREFIXED_TOUCH_ACTION !== undefined;\n\n// magical touchAction value\nvar TOUCH_ACTION_COMPUTE = 'compute';\nvar TOUCH_ACTION_AUTO = 'auto';\nvar TOUCH_ACTION_MANIPULATION = 'manipulation'; // not implemented\nvar TOUCH_ACTION_NONE = 'none';\nvar TOUCH_ACTION_PAN_X = 'pan-x';\nvar TOUCH_ACTION_PAN_Y = 'pan-y';\nvar TOUCH_ACTION_MAP = getTouchActionProps();\n\n/**\n * Touch Action\n * sets the touchAction property or uses the js alternative\n * @param {Manager} manager\n * @param {String} value\n * @constructor\n */\nfunction TouchAction(manager, value) {\n    this.manager = manager;\n    this.set(value);\n}\n\nTouchAction.prototype = {\n    /**\n     * set the touchAction value on the element or enable the polyfill\n     * @param {String} value\n     */\n    set: function(value) {\n        // find out the touch-action by the event handlers\n        if (value == TOUCH_ACTION_COMPUTE) {\n            value = this.compute();\n        }\n\n        if (NATIVE_TOUCH_ACTION && this.manager.element.style && TOUCH_ACTION_MAP[value]) {\n            this.manager.element.style[PREFIXED_TOUCH_ACTION] = value;\n        }\n        this.actions = value.toLowerCase().trim();\n    },\n\n    /**\n     * just re-set the touchAction value\n     */\n    update: function() {\n        this.set(this.manager.options.touchAction);\n    },\n\n    /**\n     * compute the value for the touchAction property based on the recognizer's settings\n     * @returns {String} value\n     */\n    compute: function() {\n        var actions = [];\n        each(this.manager.recognizers, function(recognizer) {\n            if (boolOrFn(recognizer.options.enable, [recognizer])) {\n                actions = actions.concat(recognizer.getTouchAction());\n            }\n        });\n        return cleanTouchActions(actions.join(' '));\n    },\n\n    /**\n     * this method is called on each input cycle and provides the preventing of the browser behavior\n     * @param {Object} input\n     */\n    preventDefaults: function(input) {\n        var srcEvent = input.srcEvent;\n        var direction = input.offsetDirection;\n\n        // if the touch action did prevented once this session\n        if (this.manager.session.prevented) {\n            srcEvent.preventDefault();\n            return;\n        }\n\n        var actions = this.actions;\n        var hasNone = inStr(actions, TOUCH_ACTION_NONE) && !TOUCH_ACTION_MAP[TOUCH_ACTION_NONE];\n        var hasPanY = inStr(actions, TOUCH_ACTION_PAN_Y) && !TOUCH_ACTION_MAP[TOUCH_ACTION_PAN_Y];\n        var hasPanX = inStr(actions, TOUCH_ACTION_PAN_X) && !TOUCH_ACTION_MAP[TOUCH_ACTION_PAN_X];\n\n        if (hasNone) {\n            //do not prevent defaults if this is a tap gesture\n\n            var isTapPointer = input.pointers.length === 1;\n            var isTapMovement = input.distance < 2;\n            var isTapTouchTime = input.deltaTime < 250;\n\n            if (isTapPointer && isTapMovement && isTapTouchTime) {\n                return;\n            }\n        }\n\n        if (hasPanX && hasPanY) {\n            // `pan-x pan-y` means browser handles all scrolling/panning, do not prevent\n            return;\n        }\n\n        if (hasNone ||\n            (hasPanY && direction & DIRECTION_HORIZONTAL) ||\n            (hasPanX && direction & DIRECTION_VERTICAL)) {\n            return this.preventSrc(srcEvent);\n        }\n    },\n\n    /**\n     * call preventDefault to prevent the browser's default behavior (scrolling in most cases)\n     * @param {Object} srcEvent\n     */\n    preventSrc: function(srcEvent) {\n        this.manager.session.prevented = true;\n        srcEvent.preventDefault();\n    }\n};\n\n/**\n * when the touchActions are collected they are not a valid value, so we need to clean things up. *\n * @param {String} actions\n * @returns {*}\n */\nfunction cleanTouchActions(actions) {\n    // none\n    if (inStr(actions, TOUCH_ACTION_NONE)) {\n        return TOUCH_ACTION_NONE;\n    }\n\n    var hasPanX = inStr(actions, TOUCH_ACTION_PAN_X);\n    var hasPanY = inStr(actions, TOUCH_ACTION_PAN_Y);\n\n    // if both pan-x and pan-y are set (different recognizers\n    // for different directions, e.g. horizontal pan but vertical swipe?)\n    // we need none (as otherwise with pan-x pan-y combined none of these\n    // recognizers will work, since the browser would handle all panning\n    if (hasPanX && hasPanY) {\n        return TOUCH_ACTION_NONE;\n    }\n\n    // pan-x OR pan-y\n    if (hasPanX || hasPanY) {\n        return hasPanX ? TOUCH_ACTION_PAN_X : TOUCH_ACTION_PAN_Y;\n    }\n\n    // manipulation\n    if (inStr(actions, TOUCH_ACTION_MANIPULATION)) {\n        return TOUCH_ACTION_MANIPULATION;\n    }\n\n    return TOUCH_ACTION_AUTO;\n}\n\nfunction getTouchActionProps() {\n    if (!NATIVE_TOUCH_ACTION) {\n        return false;\n    }\n    var touchMap = {};\n    var cssSupports = window.CSS && window.CSS.supports;\n    ['auto', 'manipulation', 'pan-y', 'pan-x', 'pan-x pan-y', 'none'].forEach(function(val) {\n\n        // If css.supports is not supported but there is native touch-action assume it supports\n        // all values. This is the case for IE 10 and 11.\n        touchMap[val] = cssSupports ? window.CSS.supports('touch-action', val) : true;\n    });\n    return touchMap;\n}\n\n/**\n * Recognizer flow explained; *\n * All recognizers have the initial state of POSSIBLE when a input session starts.\n * The definition of a input session is from the first input until the last input, with all it's movement in it. *\n * Example session for mouse-input: mousedown -> mousemove -> mouseup\n *\n * On each recognizing cycle (see Manager.recognize) the .recognize() method is executed\n * which determines with state it should be.\n *\n * If the recognizer has the state FAILED, CANCELLED or RECOGNIZED (equals ENDED), it is reset to\n * POSSIBLE to give it another change on the next cycle.\n *\n *               Possible\n *                  |\n *            +-----+---------------+\n *            |                     |\n *      +-----+-----+               |\n *      |           |               |\n *   Failed      Cancelled          |\n *                          +-------+------+\n *                          |              |\n *                      Recognized       Began\n *                                         |\n *                                      Changed\n *                                         |\n *                                  Ended/Recognized\n */\nvar STATE_POSSIBLE = 1;\nvar STATE_BEGAN = 2;\nvar STATE_CHANGED = 4;\nvar STATE_ENDED = 8;\nvar STATE_RECOGNIZED = STATE_ENDED;\nvar STATE_CANCELLED = 16;\nvar STATE_FAILED = 32;\n\n/**\n * Recognizer\n * Every recognizer needs to extend from this class.\n * @constructor\n * @param {Object} options\n */\nfunction Recognizer(options) {\n    this.options = assign({}, this.defaults, options || {});\n\n    this.id = uniqueId();\n\n    this.manager = null;\n\n    // default is enable true\n    this.options.enable = ifUndefined(this.options.enable, true);\n\n    this.state = STATE_POSSIBLE;\n\n    this.simultaneous = {};\n    this.requireFail = [];\n}\n\nRecognizer.prototype = {\n    /**\n     * @virtual\n     * @type {Object}\n     */\n    defaults: {},\n\n    /**\n     * set options\n     * @param {Object} options\n     * @return {Recognizer}\n     */\n    set: function(options) {\n        assign(this.options, options);\n\n        // also update the touchAction, in case something changed about the directions/enabled state\n        this.manager && this.manager.touchAction.update();\n        return this;\n    },\n\n    /**\n     * recognize simultaneous with an other recognizer.\n     * @param {Recognizer} otherRecognizer\n     * @returns {Recognizer} this\n     */\n    recognizeWith: function(otherRecognizer) {\n        if (invokeArrayArg(otherRecognizer, 'recognizeWith', this)) {\n            return this;\n        }\n\n        var simultaneous = this.simultaneous;\n        otherRecognizer = getRecognizerByNameIfManager(otherRecognizer, this);\n        if (!simultaneous[otherRecognizer.id]) {\n            simultaneous[otherRecognizer.id] = otherRecognizer;\n            otherRecognizer.recognizeWith(this);\n        }\n        return this;\n    },\n\n    /**\n     * drop the simultaneous link. it doesnt remove the link on the other recognizer.\n     * @param {Recognizer} otherRecognizer\n     * @returns {Recognizer} this\n     */\n    dropRecognizeWith: function(otherRecognizer) {\n        if (invokeArrayArg(otherRecognizer, 'dropRecognizeWith', this)) {\n            return this;\n        }\n\n        otherRecognizer = getRecognizerByNameIfManager(otherRecognizer, this);\n        delete this.simultaneous[otherRecognizer.id];\n        return this;\n    },\n\n    /**\n     * recognizer can only run when an other is failing\n     * @param {Recognizer} otherRecognizer\n     * @returns {Recognizer} this\n     */\n    requireFailure: function(otherRecognizer) {\n        if (invokeArrayArg(otherRecognizer, 'requireFailure', this)) {\n            return this;\n        }\n\n        var requireFail = this.requireFail;\n        otherRecognizer = getRecognizerByNameIfManager(otherRecognizer, this);\n        if (inArray(requireFail, otherRecognizer) === -1) {\n            requireFail.push(otherRecognizer);\n            otherRecognizer.requireFailure(this);\n        }\n        return this;\n    },\n\n    /**\n     * drop the requireFailure link. it does not remove the link on the other recognizer.\n     * @param {Recognizer} otherRecognizer\n     * @returns {Recognizer} this\n     */\n    dropRequireFailure: function(otherRecognizer) {\n        if (invokeArrayArg(otherRecognizer, 'dropRequireFailure', this)) {\n            return this;\n        }\n\n        otherRecognizer = getRecognizerByNameIfManager(otherRecognizer, this);\n        var index = inArray(this.requireFail, otherRecognizer);\n        if (index > -1) {\n            this.requireFail.splice(index, 1);\n        }\n        return this;\n    },\n\n    /**\n     * has require failures boolean\n     * @returns {boolean}\n     */\n    hasRequireFailures: function() {\n        return this.requireFail.length > 0;\n    },\n\n    /**\n     * if the recognizer can recognize simultaneous with an other recognizer\n     * @param {Recognizer} otherRecognizer\n     * @returns {Boolean}\n     */\n    canRecognizeWith: function(otherRecognizer) {\n        return !!this.simultaneous[otherRecognizer.id];\n    },\n\n    /**\n     * You should use `tryEmit` instead of `emit` directly to check\n     * that all the needed recognizers has failed before emitting.\n     * @param {Object} input\n     */\n    emit: function(input) {\n        var self = this;\n        var state = this.state;\n\n        function emit(event) {\n            self.manager.emit(event, input);\n        }\n\n        // 'panstart' and 'panmove'\n        if (state < STATE_ENDED) {\n            emit(self.options.event + stateStr(state));\n        }\n\n        emit(self.options.event); // simple 'eventName' events\n\n        if (input.additionalEvent) { // additional event(panleft, panright, pinchin, pinchout...)\n            emit(input.additionalEvent);\n        }\n\n        // panend and pancancel\n        if (state >= STATE_ENDED) {\n            emit(self.options.event + stateStr(state));\n        }\n    },\n\n    /**\n     * Check that all the require failure recognizers has failed,\n     * if true, it emits a gesture event,\n     * otherwise, setup the state to FAILED.\n     * @param {Object} input\n     */\n    tryEmit: function(input) {\n        if (this.canEmit()) {\n            return this.emit(input);\n        }\n        // it's failing anyway\n        this.state = STATE_FAILED;\n    },\n\n    /**\n     * can we emit?\n     * @returns {boolean}\n     */\n    canEmit: function() {\n        var i = 0;\n        while (i < this.requireFail.length) {\n            if (!(this.requireFail[i].state & (STATE_FAILED | STATE_POSSIBLE))) {\n                return false;\n            }\n            i++;\n        }\n        return true;\n    },\n\n    /**\n     * update the recognizer\n     * @param {Object} inputData\n     */\n    recognize: function(inputData) {\n        // make a new copy of the inputData\n        // so we can change the inputData without messing up the other recognizers\n        var inputDataClone = assign({}, inputData);\n\n        // is is enabled and allow recognizing?\n        if (!boolOrFn(this.options.enable, [this, inputDataClone])) {\n            this.reset();\n            this.state = STATE_FAILED;\n            return;\n        }\n\n        // reset when we've reached the end\n        if (this.state & (STATE_RECOGNIZED | STATE_CANCELLED | STATE_FAILED)) {\n            this.state = STATE_POSSIBLE;\n        }\n\n        this.state = this.process(inputDataClone);\n\n        // the recognizer has recognized a gesture\n        // so trigger an event\n        if (this.state & (STATE_BEGAN | STATE_CHANGED | STATE_ENDED | STATE_CANCELLED)) {\n            this.tryEmit(inputDataClone);\n        }\n    },\n\n    /**\n     * return the state of the recognizer\n     * the actual recognizing happens in this method\n     * @virtual\n     * @param {Object} inputData\n     * @returns {Const} STATE\n     */\n    process: function(inputData) { }, // jshint ignore:line\n\n    /**\n     * return the preferred touch-action\n     * @virtual\n     * @returns {Array}\n     */\n    getTouchAction: function() { },\n\n    /**\n     * called when the gesture isn't allowed to recognize\n     * like when another is being recognized or it is disabled\n     * @virtual\n     */\n    reset: function() { }\n};\n\n/**\n * get a usable string, used as event postfix\n * @param {Const} state\n * @returns {String} state\n */\nfunction stateStr(state) {\n    if (state & STATE_CANCELLED) {\n        return 'cancel';\n    } else if (state & STATE_ENDED) {\n        return 'end';\n    } else if (state & STATE_CHANGED) {\n        return 'move';\n    } else if (state & STATE_BEGAN) {\n        return 'start';\n    }\n    return '';\n}\n\n/**\n * direction cons to string\n * @param {Const} direction\n * @returns {String}\n */\nfunction directionStr(direction) {\n    if (direction == DIRECTION_DOWN) {\n        return 'down';\n    } else if (direction == DIRECTION_UP) {\n        return 'up';\n    } else if (direction == DIRECTION_LEFT) {\n        return 'left';\n    } else if (direction == DIRECTION_RIGHT) {\n        return 'right';\n    }\n    return '';\n}\n\n/**\n * get a recognizer by name if it is bound to a manager\n * @param {Recognizer|String} otherRecognizer\n * @param {Recognizer} recognizer\n * @returns {Recognizer}\n */\nfunction getRecognizerByNameIfManager(otherRecognizer, recognizer) {\n    var manager = recognizer.manager;\n    if (manager) {\n        return manager.get(otherRecognizer);\n    }\n    return otherRecognizer;\n}\n\n/**\n * This recognizer is just used as a base for the simple attribute recognizers.\n * @constructor\n * @extends Recognizer\n */\nfunction AttrRecognizer() {\n    Recognizer.apply(this, arguments);\n}\n\ninherit(AttrRecognizer, Recognizer, {\n    /**\n     * @namespace\n     * @memberof AttrRecognizer\n     */\n    defaults: {\n        /**\n         * @type {Number}\n         * @default 1\n         */\n        pointers: 1\n    },\n\n    /**\n     * Used to check if it the recognizer receives valid input, like input.distance > 10.\n     * @memberof AttrRecognizer\n     * @param {Object} input\n     * @returns {Boolean} recognized\n     */\n    attrTest: function(input) {\n        var optionPointers = this.options.pointers;\n        return optionPointers === 0 || input.pointers.length === optionPointers;\n    },\n\n    /**\n     * Process the input and return the state for the recognizer\n     * @memberof AttrRecognizer\n     * @param {Object} input\n     * @returns {*} State\n     */\n    process: function(input) {\n        var state = this.state;\n        var eventType = input.eventType;\n\n        var isRecognized = state & (STATE_BEGAN | STATE_CHANGED);\n        var isValid = this.attrTest(input);\n\n        // on cancel input and we've recognized before, return STATE_CANCELLED\n        if (isRecognized && (eventType & INPUT_CANCEL || !isValid)) {\n            return state | STATE_CANCELLED;\n        } else if (isRecognized || isValid) {\n            if (eventType & INPUT_END) {\n                return state | STATE_ENDED;\n            } else if (!(state & STATE_BEGAN)) {\n                return STATE_BEGAN;\n            }\n            return state | STATE_CHANGED;\n        }\n        return STATE_FAILED;\n    }\n});\n\n/**\n * Pan\n * Recognized when the pointer is down and moved in the allowed direction.\n * @constructor\n * @extends AttrRecognizer\n */\nfunction PanRecognizer() {\n    AttrRecognizer.apply(this, arguments);\n\n    this.pX = null;\n    this.pY = null;\n}\n\ninherit(PanRecognizer, AttrRecognizer, {\n    /**\n     * @namespace\n     * @memberof PanRecognizer\n     */\n    defaults: {\n        event: 'pan',\n        threshold: 10,\n        pointers: 1,\n        direction: DIRECTION_ALL\n    },\n\n    getTouchAction: function() {\n        var direction = this.options.direction;\n        var actions = [];\n        if (direction & DIRECTION_HORIZONTAL) {\n            actions.push(TOUCH_ACTION_PAN_Y);\n        }\n        if (direction & DIRECTION_VERTICAL) {\n            actions.push(TOUCH_ACTION_PAN_X);\n        }\n        return actions;\n    },\n\n    directionTest: function(input) {\n        var options = this.options;\n        var hasMoved = true;\n        var distance = input.distance;\n        var direction = input.direction;\n        var x = input.deltaX;\n        var y = input.deltaY;\n\n        // lock to axis?\n        if (!(direction & options.direction)) {\n            if (options.direction & DIRECTION_HORIZONTAL) {\n                direction = (x === 0) ? DIRECTION_NONE : (x < 0) ? DIRECTION_LEFT : DIRECTION_RIGHT;\n                hasMoved = x != this.pX;\n                distance = Math.abs(input.deltaX);\n            } else {\n                direction = (y === 0) ? DIRECTION_NONE : (y < 0) ? DIRECTION_UP : DIRECTION_DOWN;\n                hasMoved = y != this.pY;\n                distance = Math.abs(input.deltaY);\n            }\n        }\n        input.direction = direction;\n        return hasMoved && distance > options.threshold && direction & options.direction;\n    },\n\n    attrTest: function(input) {\n        return AttrRecognizer.prototype.attrTest.call(this, input) &&\n            (this.state & STATE_BEGAN || (!(this.state & STATE_BEGAN) && this.directionTest(input)));\n    },\n\n    emit: function(input) {\n\n        this.pX = input.deltaX;\n        this.pY = input.deltaY;\n\n        var direction = directionStr(input.direction);\n\n        if (direction) {\n            input.additionalEvent = this.options.event + direction;\n        }\n        this._super.emit.call(this, input);\n    }\n});\n\n/**\n * Pinch\n * Recognized when two or more pointers are moving toward (zoom-in) or away from each other (zoom-out).\n * @constructor\n * @extends AttrRecognizer\n */\nfunction PinchRecognizer() {\n    AttrRecognizer.apply(this, arguments);\n}\n\ninherit(PinchRecognizer, AttrRecognizer, {\n    /**\n     * @namespace\n     * @memberof PinchRecognizer\n     */\n    defaults: {\n        event: 'pinch',\n        threshold: 0,\n        pointers: 2\n    },\n\n    getTouchAction: function() {\n        return [TOUCH_ACTION_NONE];\n    },\n\n    attrTest: function(input) {\n        return this._super.attrTest.call(this, input) &&\n            (Math.abs(input.scale - 1) > this.options.threshold || this.state & STATE_BEGAN);\n    },\n\n    emit: function(input) {\n        if (input.scale !== 1) {\n            var inOut = input.scale < 1 ? 'in' : 'out';\n            input.additionalEvent = this.options.event + inOut;\n        }\n        this._super.emit.call(this, input);\n    }\n});\n\n/**\n * Press\n * Recognized when the pointer is down for x ms without any movement.\n * @constructor\n * @extends Recognizer\n */\nfunction PressRecognizer() {\n    Recognizer.apply(this, arguments);\n\n    this._timer = null;\n    this._input = null;\n}\n\ninherit(PressRecognizer, Recognizer, {\n    /**\n     * @namespace\n     * @memberof PressRecognizer\n     */\n    defaults: {\n        event: 'press',\n        pointers: 1,\n        time: 251, // minimal time of the pointer to be pressed\n        threshold: 9 // a minimal movement is ok, but keep it low\n    },\n\n    getTouchAction: function() {\n        return [TOUCH_ACTION_AUTO];\n    },\n\n    process: function(input) {\n        var options = this.options;\n        var validPointers = input.pointers.length === options.pointers;\n        var validMovement = input.distance < options.threshold;\n        var validTime = input.deltaTime > options.time;\n\n        this._input = input;\n\n        // we only allow little movement\n        // and we've reached an end event, so a tap is possible\n        if (!validMovement || !validPointers || (input.eventType & (INPUT_END | INPUT_CANCEL) && !validTime)) {\n            this.reset();\n        } else if (input.eventType & INPUT_START) {\n            this.reset();\n            this._timer = setTimeoutContext(function() {\n                this.state = STATE_RECOGNIZED;\n                this.tryEmit();\n            }, options.time, this);\n        } else if (input.eventType & INPUT_END) {\n            return STATE_RECOGNIZED;\n        }\n        return STATE_FAILED;\n    },\n\n    reset: function() {\n        clearTimeout(this._timer);\n    },\n\n    emit: function(input) {\n        if (this.state !== STATE_RECOGNIZED) {\n            return;\n        }\n\n        if (input && (input.eventType & INPUT_END)) {\n            this.manager.emit(this.options.event + 'up', input);\n        } else {\n            this._input.timeStamp = now();\n            this.manager.emit(this.options.event, this._input);\n        }\n    }\n});\n\n/**\n * Rotate\n * Recognized when two or more pointer are moving in a circular motion.\n * @constructor\n * @extends AttrRecognizer\n */\nfunction RotateRecognizer() {\n    AttrRecognizer.apply(this, arguments);\n}\n\ninherit(RotateRecognizer, AttrRecognizer, {\n    /**\n     * @namespace\n     * @memberof RotateRecognizer\n     */\n    defaults: {\n        event: 'rotate',\n        threshold: 0,\n        pointers: 2\n    },\n\n    getTouchAction: function() {\n        return [TOUCH_ACTION_NONE];\n    },\n\n    attrTest: function(input) {\n        return this._super.attrTest.call(this, input) &&\n            (Math.abs(input.rotation) > this.options.threshold || this.state & STATE_BEGAN);\n    }\n});\n\n/**\n * Swipe\n * Recognized when the pointer is moving fast (velocity), with enough distance in the allowed direction.\n * @constructor\n * @extends AttrRecognizer\n */\nfunction SwipeRecognizer() {\n    AttrRecognizer.apply(this, arguments);\n}\n\ninherit(SwipeRecognizer, AttrRecognizer, {\n    /**\n     * @namespace\n     * @memberof SwipeRecognizer\n     */\n    defaults: {\n        event: 'swipe',\n        threshold: 10,\n        velocity: 0.3,\n        direction: DIRECTION_HORIZONTAL | DIRECTION_VERTICAL,\n        pointers: 1\n    },\n\n    getTouchAction: function() {\n        return PanRecognizer.prototype.getTouchAction.call(this);\n    },\n\n    attrTest: function(input) {\n        var direction = this.options.direction;\n        var velocity;\n\n        if (direction & (DIRECTION_HORIZONTAL | DIRECTION_VERTICAL)) {\n            velocity = input.overallVelocity;\n        } else if (direction & DIRECTION_HORIZONTAL) {\n            velocity = input.overallVelocityX;\n        } else if (direction & DIRECTION_VERTICAL) {\n            velocity = input.overallVelocityY;\n        }\n\n        return this._super.attrTest.call(this, input) &&\n            direction & input.offsetDirection &&\n            input.distance > this.options.threshold &&\n            input.maxPointers == this.options.pointers &&\n            abs(velocity) > this.options.velocity && input.eventType & INPUT_END;\n    },\n\n    emit: function(input) {\n        var direction = directionStr(input.offsetDirection);\n        if (direction) {\n            this.manager.emit(this.options.event + direction, input);\n        }\n\n        this.manager.emit(this.options.event, input);\n    }\n});\n\n/**\n * A tap is ecognized when the pointer is doing a small tap/click. Multiple taps are recognized if they occur\n * between the given interval and position. The delay option can be used to recognize multi-taps without firing\n * a single tap.\n *\n * The eventData from the emitted event contains the property `tapCount`, which contains the amount of\n * multi-taps being recognized.\n * @constructor\n * @extends Recognizer\n */\nfunction TapRecognizer() {\n    Recognizer.apply(this, arguments);\n\n    // previous time and center,\n    // used for tap counting\n    this.pTime = false;\n    this.pCenter = false;\n\n    this._timer = null;\n    this._input = null;\n    this.count = 0;\n}\n\ninherit(TapRecognizer, Recognizer, {\n    /**\n     * @namespace\n     * @memberof PinchRecognizer\n     */\n    defaults: {\n        event: 'tap',\n        pointers: 1,\n        taps: 1,\n        interval: 300, // max time between the multi-tap taps\n        time: 250, // max time of the pointer to be down (like finger on the screen)\n        threshold: 9, // a minimal movement is ok, but keep it low\n        posThreshold: 10 // a multi-tap can be a bit off the initial position\n    },\n\n    getTouchAction: function() {\n        return [TOUCH_ACTION_MANIPULATION];\n    },\n\n    process: function(input) {\n        var options = this.options;\n\n        var validPointers = input.pointers.length === options.pointers;\n        var validMovement = input.distance < options.threshold;\n        var validTouchTime = input.deltaTime < options.time;\n\n        this.reset();\n\n        if ((input.eventType & INPUT_START) && (this.count === 0)) {\n            return this.failTimeout();\n        }\n\n        // we only allow little movement\n        // and we've reached an end event, so a tap is possible\n        if (validMovement && validTouchTime && validPointers) {\n            if (input.eventType != INPUT_END) {\n                return this.failTimeout();\n            }\n\n            var validInterval = this.pTime ? (input.timeStamp - this.pTime < options.interval) : true;\n            var validMultiTap = !this.pCenter || getDistance(this.pCenter, input.center) < options.posThreshold;\n\n            this.pTime = input.timeStamp;\n            this.pCenter = input.center;\n\n            if (!validMultiTap || !validInterval) {\n                this.count = 1;\n            } else {\n                this.count += 1;\n            }\n\n            this._input = input;\n\n            // if tap count matches we have recognized it,\n            // else it has began recognizing...\n            var tapCount = this.count % options.taps;\n            if (tapCount === 0) {\n                // no failing requirements, immediately trigger the tap event\n                // or wait as long as the multitap interval to trigger\n                if (!this.hasRequireFailures()) {\n                    return STATE_RECOGNIZED;\n                } else {\n                    this._timer = setTimeoutContext(function() {\n                        this.state = STATE_RECOGNIZED;\n                        this.tryEmit();\n                    }, options.interval, this);\n                    return STATE_BEGAN;\n                }\n            }\n        }\n        return STATE_FAILED;\n    },\n\n    failTimeout: function() {\n        this._timer = setTimeoutContext(function() {\n            this.state = STATE_FAILED;\n        }, this.options.interval, this);\n        return STATE_FAILED;\n    },\n\n    reset: function() {\n        clearTimeout(this._timer);\n    },\n\n    emit: function() {\n        if (this.state == STATE_RECOGNIZED) {\n            this._input.tapCount = this.count;\n            this.manager.emit(this.options.event, this._input);\n        }\n    }\n});\n\n/**\n * Simple way to create a manager with a default set of recognizers.\n * @param {HTMLElement} element\n * @param {Object} [options]\n * @constructor\n */\nfunction Hammer(element, options) {\n    options = options || {};\n    options.recognizers = ifUndefined(options.recognizers, Hammer.defaults.preset);\n    return new Manager(element, options);\n}\n\n/**\n * @const {string}\n */\nHammer.VERSION = '2.0.7';\n\n/**\n * default settings\n * @namespace\n */\nHammer.defaults = {\n    /**\n     * set if DOM events are being triggered.\n     * But this is slower and unused by simple implementations, so disabled by default.\n     * @type {Boolean}\n     * @default false\n     */\n    domEvents: false,\n\n    /**\n     * The value for the touchAction property/fallback.\n     * When set to `compute` it will magically set the correct value based on the added recognizers.\n     * @type {String}\n     * @default compute\n     */\n    touchAction: TOUCH_ACTION_COMPUTE,\n\n    /**\n     * @type {Boolean}\n     * @default true\n     */\n    enable: true,\n\n    /**\n     * EXPERIMENTAL FEATURE -- can be removed/changed\n     * Change the parent input target element.\n     * If Null, then it is being set the to main element.\n     * @type {Null|EventTarget}\n     * @default null\n     */\n    inputTarget: null,\n\n    /**\n     * force an input class\n     * @type {Null|Function}\n     * @default null\n     */\n    inputClass: null,\n\n    /**\n     * Default recognizer setup when calling `Hammer()`\n     * When creating a new Manager these will be skipped.\n     * @type {Array}\n     */\n    preset: [\n        // RecognizerClass, options, [recognizeWith, ...], [requireFailure, ...]\n        [RotateRecognizer, {enable: false}],\n        [PinchRecognizer, {enable: false}, ['rotate']],\n        [SwipeRecognizer, {direction: DIRECTION_HORIZONTAL}],\n        [PanRecognizer, {direction: DIRECTION_HORIZONTAL}, ['swipe']],\n        [TapRecognizer],\n        [TapRecognizer, {event: 'doubletap', taps: 2}, ['tap']],\n        [PressRecognizer]\n    ],\n\n    /**\n     * Some CSS properties can be used to improve the working of Hammer.\n     * Add them to this method and they will be set when creating a new Manager.\n     * @namespace\n     */\n    cssProps: {\n        /**\n         * Disables text selection to improve the dragging gesture. Mainly for desktop browsers.\n         * @type {String}\n         * @default 'none'\n         */\n        userSelect: 'none',\n\n        /**\n         * Disable the Windows Phone grippers when pressing an element.\n         * @type {String}\n         * @default 'none'\n         */\n        touchSelect: 'none',\n\n        /**\n         * Disables the default callout shown when you touch and hold a touch target.\n         * On iOS, when you touch and hold a touch target such as a link, Safari displays\n         * a callout containing information about the link. This property allows you to disable that callout.\n         * @type {String}\n         * @default 'none'\n         */\n        touchCallout: 'none',\n\n        /**\n         * Specifies whether zooming is enabled. Used by IE10>\n         * @type {String}\n         * @default 'none'\n         */\n        contentZooming: 'none',\n\n        /**\n         * Specifies that an entire element should be draggable instead of its contents. Mainly for desktop browsers.\n         * @type {String}\n         * @default 'none'\n         */\n        userDrag: 'none',\n\n        /**\n         * Overrides the highlight color shown when the user taps a link or a JavaScript\n         * clickable element in iOS. This property obeys the alpha value, if specified.\n         * @type {String}\n         * @default 'rgba(0,0,0,0)'\n         */\n        tapHighlightColor: 'rgba(0,0,0,0)'\n    }\n};\n\nvar STOP = 1;\nvar FORCED_STOP = 2;\n\n/**\n * Manager\n * @param {HTMLElement} element\n * @param {Object} [options]\n * @constructor\n */\nfunction Manager(element, options) {\n    this.options = assign({}, Hammer.defaults, options || {});\n\n    this.options.inputTarget = this.options.inputTarget || element;\n\n    this.handlers = {};\n    this.session = {};\n    this.recognizers = [];\n    this.oldCssProps = {};\n\n    this.element = element;\n    this.input = createInputInstance(this);\n    this.touchAction = new TouchAction(this, this.options.touchAction);\n\n    toggleCssProps(this, true);\n\n    each(this.options.recognizers, function(item) {\n        var recognizer = this.add(new (item[0])(item[1]));\n        item[2] && recognizer.recognizeWith(item[2]);\n        item[3] && recognizer.requireFailure(item[3]);\n    }, this);\n}\n\nManager.prototype = {\n    /**\n     * set options\n     * @param {Object} options\n     * @returns {Manager}\n     */\n    set: function(options) {\n        assign(this.options, options);\n\n        // Options that need a little more setup\n        if (options.touchAction) {\n            this.touchAction.update();\n        }\n        if (options.inputTarget) {\n            // Clean up existing event listeners and reinitialize\n            this.input.destroy();\n            this.input.target = options.inputTarget;\n            this.input.init();\n        }\n        return this;\n    },\n\n    /**\n     * stop recognizing for this session.\n     * This session will be discarded, when a new [input]start event is fired.\n     * When forced, the recognizer cycle is stopped immediately.\n     * @param {Boolean} [force]\n     */\n    stop: function(force) {\n        this.session.stopped = force ? FORCED_STOP : STOP;\n    },\n\n    /**\n     * run the recognizers!\n     * called by the inputHandler function on every movement of the pointers (touches)\n     * it walks through all the recognizers and tries to detect the gesture that is being made\n     * @param {Object} inputData\n     */\n    recognize: function(inputData) {\n        var session = this.session;\n        if (session.stopped) {\n            return;\n        }\n\n        // run the touch-action polyfill\n        this.touchAction.preventDefaults(inputData);\n\n        var recognizer;\n        var recognizers = this.recognizers;\n\n        // this holds the recognizer that is being recognized.\n        // so the recognizer's state needs to be BEGAN, CHANGED, ENDED or RECOGNIZED\n        // if no recognizer is detecting a thing, it is set to `null`\n        var curRecognizer = session.curRecognizer;\n\n        // reset when the last recognizer is recognized\n        // or when we're in a new session\n        if (!curRecognizer || (curRecognizer && curRecognizer.state & STATE_RECOGNIZED)) {\n            curRecognizer = session.curRecognizer = null;\n        }\n\n        var i = 0;\n        while (i < recognizers.length) {\n            recognizer = recognizers[i];\n\n            // find out if we are allowed try to recognize the input for this one.\n            // 1.   allow if the session is NOT forced stopped (see the .stop() method)\n            // 2.   allow if we still haven't recognized a gesture in this session, or the this recognizer is the one\n            //      that is being recognized.\n            // 3.   allow if the recognizer is allowed to run simultaneous with the current recognized recognizer.\n            //      this can be setup with the `recognizeWith()` method on the recognizer.\n            if (session.stopped !== FORCED_STOP && ( // 1\n                    !curRecognizer || recognizer == curRecognizer || // 2\n                    recognizer.canRecognizeWith(curRecognizer))) { // 3\n                recognizer.recognize(inputData);\n            } else {\n                recognizer.reset();\n            }\n\n            // if the recognizer has been recognizing the input as a valid gesture, we want to store this one as the\n            // current active recognizer. but only if we don't already have an active recognizer\n            if (!curRecognizer && recognizer.state & (STATE_BEGAN | STATE_CHANGED | STATE_ENDED)) {\n                curRecognizer = session.curRecognizer = recognizer;\n            }\n            i++;\n        }\n    },\n\n    /**\n     * get a recognizer by its event name.\n     * @param {Recognizer|String} recognizer\n     * @returns {Recognizer|Null}\n     */\n    get: function(recognizer) {\n        if (recognizer instanceof Recognizer) {\n            return recognizer;\n        }\n\n        var recognizers = this.recognizers;\n        for (var i = 0; i < recognizers.length; i++) {\n            if (recognizers[i].options.event == recognizer) {\n                return recognizers[i];\n            }\n        }\n        return null;\n    },\n\n    /**\n     * add a recognizer to the manager\n     * existing recognizers with the same event name will be removed\n     * @param {Recognizer} recognizer\n     * @returns {Recognizer|Manager}\n     */\n    add: function(recognizer) {\n        if (invokeArrayArg(recognizer, 'add', this)) {\n            return this;\n        }\n\n        // remove existing\n        var existing = this.get(recognizer.options.event);\n        if (existing) {\n            this.remove(existing);\n        }\n\n        this.recognizers.push(recognizer);\n        recognizer.manager = this;\n\n        this.touchAction.update();\n        return recognizer;\n    },\n\n    /**\n     * remove a recognizer by name or instance\n     * @param {Recognizer|String} recognizer\n     * @returns {Manager}\n     */\n    remove: function(recognizer) {\n        if (invokeArrayArg(recognizer, 'remove', this)) {\n            return this;\n        }\n\n        recognizer = this.get(recognizer);\n\n        // let's make sure this recognizer exists\n        if (recognizer) {\n            var recognizers = this.recognizers;\n            var index = inArray(recognizers, recognizer);\n\n            if (index !== -1) {\n                recognizers.splice(index, 1);\n                this.touchAction.update();\n            }\n        }\n\n        return this;\n    },\n\n    /**\n     * bind event\n     * @param {String} events\n     * @param {Function} handler\n     * @returns {EventEmitter} this\n     */\n    on: function(events, handler) {\n        if (events === undefined) {\n            return;\n        }\n        if (handler === undefined) {\n            return;\n        }\n\n        var handlers = this.handlers;\n        each(splitStr(events), function(event) {\n            handlers[event] = handlers[event] || [];\n            handlers[event].push(handler);\n        });\n        return this;\n    },\n\n    /**\n     * unbind event, leave emit blank to remove all handlers\n     * @param {String} events\n     * @param {Function} [handler]\n     * @returns {EventEmitter} this\n     */\n    off: function(events, handler) {\n        if (events === undefined) {\n            return;\n        }\n\n        var handlers = this.handlers;\n        each(splitStr(events), function(event) {\n            if (!handler) {\n                delete handlers[event];\n            } else {\n                handlers[event] && handlers[event].splice(inArray(handlers[event], handler), 1);\n            }\n        });\n        return this;\n    },\n\n    /**\n     * emit event to the listeners\n     * @param {String} event\n     * @param {Object} data\n     */\n    emit: function(event, data) {\n        // we also want to trigger dom events\n        if (this.options.domEvents) {\n            triggerDomEvent(event, data);\n        }\n\n        // no handlers, so skip it all\n        var handlers = this.handlers[event] && this.handlers[event].slice();\n        if (!handlers || !handlers.length) {\n            return;\n        }\n\n        data.type = event;\n        data.preventDefault = function() {\n            data.srcEvent.preventDefault();\n        };\n\n        var i = 0;\n        while (i < handlers.length) {\n            handlers[i](data);\n            i++;\n        }\n    },\n\n    /**\n     * destroy the manager and unbinds all events\n     * it doesn't unbind dom events, that is the user own responsibility\n     */\n    destroy: function() {\n        this.element && toggleCssProps(this, false);\n\n        this.handlers = {};\n        this.session = {};\n        this.input.destroy();\n        this.element = null;\n    }\n};\n\n/**\n * add/remove the css properties as defined in manager.options.cssProps\n * @param {Manager} manager\n * @param {Boolean} add\n */\nfunction toggleCssProps(manager, add) {\n    var element = manager.element;\n    if (!element.style) {\n        return;\n    }\n    var prop;\n    each(manager.options.cssProps, function(value, name) {\n        prop = prefixed(element.style, name);\n        if (add) {\n            manager.oldCssProps[prop] = element.style[prop];\n            element.style[prop] = value;\n        } else {\n            element.style[prop] = manager.oldCssProps[prop] || '';\n        }\n    });\n    if (!add) {\n        manager.oldCssProps = {};\n    }\n}\n\n/**\n * trigger dom event\n * @param {String} event\n * @param {Object} data\n */\nfunction triggerDomEvent(event, data) {\n    var gestureEvent = document.createEvent('Event');\n    gestureEvent.initEvent(event, true, true);\n    gestureEvent.gesture = data;\n    data.target.dispatchEvent(gestureEvent);\n}\n\nassign(Hammer, {\n    INPUT_START: INPUT_START,\n    INPUT_MOVE: INPUT_MOVE,\n    INPUT_END: INPUT_END,\n    INPUT_CANCEL: INPUT_CANCEL,\n\n    STATE_POSSIBLE: STATE_POSSIBLE,\n    STATE_BEGAN: STATE_BEGAN,\n    STATE_CHANGED: STATE_CHANGED,\n    STATE_ENDED: STATE_ENDED,\n    STATE_RECOGNIZED: STATE_RECOGNIZED,\n    STATE_CANCELLED: STATE_CANCELLED,\n    STATE_FAILED: STATE_FAILED,\n\n    DIRECTION_NONE: DIRECTION_NONE,\n    DIRECTION_LEFT: DIRECTION_LEFT,\n    DIRECTION_RIGHT: DIRECTION_RIGHT,\n    DIRECTION_UP: DIRECTION_UP,\n    DIRECTION_DOWN: DIRECTION_DOWN,\n    DIRECTION_HORIZONTAL: DIRECTION_HORIZONTAL,\n    DIRECTION_VERTICAL: DIRECTION_VERTICAL,\n    DIRECTION_ALL: DIRECTION_ALL,\n\n    Manager: Manager,\n    Input: Input,\n    TouchAction: TouchAction,\n\n    TouchInput: TouchInput,\n    MouseInput: MouseInput,\n    PointerEventInput: PointerEventInput,\n    TouchMouseInput: TouchMouseInput,\n    SingleTouchInput: SingleTouchInput,\n\n    Recognizer: Recognizer,\n    AttrRecognizer: AttrRecognizer,\n    Tap: TapRecognizer,\n    Pan: PanRecognizer,\n    Swipe: SwipeRecognizer,\n    Pinch: PinchRecognizer,\n    Rotate: RotateRecognizer,\n    Press: PressRecognizer,\n\n    on: addEventListeners,\n    off: removeEventListeners,\n    each: each,\n    merge: merge,\n    extend: extend,\n    assign: assign,\n    inherit: inherit,\n    bindFn: bindFn,\n    prefixed: prefixed\n});\n\n// this prevents errors when Hammer is loaded in the presence of an AMD\n//  style loader but by script tag, not by the loader.\nvar freeGlobal = (typeof window !== 'undefined' ? window : (typeof self !== 'undefined' ? self : {})); // jshint ignore:line\nfreeGlobal.Hammer = Hammer;\n\nif (typeof define === 'function' && define.amd) {\n    define(function() {\n        return Hammer;\n    });\n} else if (typeof module != 'undefined' && module.exports) {\n    module.exports = Hammer;\n} else {\n    window[exportName] = Hammer;\n}\n\n})(window, document, 'Hammer');\n","function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {\n  try {\n    var info = gen[key](arg);\n    var value = info.value;\n  } catch (error) {\n    reject(error);\n    return;\n  }\n\n  if (info.done) {\n    resolve(value);\n  } else {\n    Promise.resolve(value).then(_next, _throw);\n  }\n}\n\nfunction _asyncToGenerator(fn) {\n  return function () {\n    var self = this,\n        args = arguments;\n    return new Promise(function (resolve, reject) {\n      var gen = fn.apply(self, args);\n\n      function _next(value) {\n        asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"next\", value);\n      }\n\n      function _throw(err) {\n        asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"throw\", err);\n      }\n\n      _next(undefined);\n    });\n  };\n}\n\nmodule.exports = _asyncToGenerator;","import { SimpleOuterSubscriber, innerSubscribe, SimpleInnerSubscriber } from '../innerSubscribe';\nexport const defaultThrottleConfig = {\n    leading: true,\n    trailing: false\n};\nexport function throttle(durationSelector, config = defaultThrottleConfig) {\n    return (source) => source.lift(new ThrottleOperator(durationSelector, !!config.leading, !!config.trailing));\n}\nclass ThrottleOperator {\n    constructor(durationSelector, leading, trailing) {\n        this.durationSelector = durationSelector;\n        this.leading = leading;\n        this.trailing = trailing;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new ThrottleSubscriber(subscriber, this.durationSelector, this.leading, this.trailing));\n    }\n}\nclass ThrottleSubscriber extends SimpleOuterSubscriber {\n    constructor(destination, durationSelector, _leading, _trailing) {\n        super(destination);\n        this.destination = destination;\n        this.durationSelector = durationSelector;\n        this._leading = _leading;\n        this._trailing = _trailing;\n        this._hasValue = false;\n    }\n    _next(value) {\n        this._hasValue = true;\n        this._sendValue = value;\n        if (!this._throttled) {\n            if (this._leading) {\n                this.send();\n            }\n            else {\n                this.throttle(value);\n            }\n        }\n    }\n    send() {\n        const { _hasValue, _sendValue } = this;\n        if (_hasValue) {\n            this.destination.next(_sendValue);\n            this.throttle(_sendValue);\n        }\n        this._hasValue = false;\n        this._sendValue = undefined;\n    }\n    throttle(value) {\n        const duration = this.tryDurationSelector(value);\n        if (!!duration) {\n            this.add(this._throttled = innerSubscribe(duration, new SimpleInnerSubscriber(this)));\n        }\n    }\n    tryDurationSelector(value) {\n        try {\n            return this.durationSelector(value);\n        }\n        catch (err) {\n            this.destination.error(err);\n            return null;\n        }\n    }\n    throttlingDone() {\n        const { _throttled, _trailing } = this;\n        if (_throttled) {\n            _throttled.unsubscribe();\n        }\n        this._throttled = undefined;\n        if (_trailing) {\n            this.send();\n        }\n    }\n    notifyNext() {\n        this.throttlingDone();\n    }\n    notifyComplete() {\n        this.throttlingDone();\n    }\n}\n//# sourceMappingURL=throttle.js.map","export function isScheduler(value) {\n    return value && typeof value.schedule === 'function';\n}\n//# sourceMappingURL=isScheduler.js.map","import { Observable } from '../Observable';\nexport function throwError(error, scheduler) {\n    if (!scheduler) {\n        return new Observable(subscriber => subscriber.error(error));\n    }\n    else {\n        return new Observable(subscriber => scheduler.schedule(dispatch, 0, { error, subscriber }));\n    }\n}\nfunction dispatch({ error, subscriber }) {\n    subscriber.error(error);\n}\n//# sourceMappingURL=throwError.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rxjs_1 = require(\"rxjs\");\nvar operators_1 = require(\"rxjs/operators\");\n/* tslint:enable:max-line-length */\n/**\n *\n * Errors if Observable does not emit a value in given time span, in case of which\n * subscribes to the second Observable.\n *\n * <span class=\"informal\">It's a version of `timeout` operator that let's you specify fallback Observable.</span>\n *\n * <img src=\"./img/timeoutWith.png\" width=\"100%\">\n *\n * `timeoutWith` is a variation of `timeout` operator. It behaves exactly the same,\n * still accepting as a first argument either a number or a Date, which control - respectively -\n * when values of source Observable should be emitted or when it should complete.\n *\n * The only difference is that it accepts a second, required parameter. This parameter\n * should be an Observable which will be subscribed when source Observable fails any timeout check.\n * So whenever regular `timeout` would emit an error, `timeoutWith` will instead start re-emitting\n * values from second Observable. Note that this fallback Observable is not checked for timeouts\n * itself, so it can emit values and complete at arbitrary points in time. From the moment of a second\n * subscription, Observable returned from `timeoutWith` simply mirrors fallback stream. When that\n * stream completes, it completes as well.\n *\n * Scheduler, which in case of `timeout` is provided as as second argument, can be still provided\n * here - as a third, optional parameter. It still is used to schedule timeout checks and -\n * as a consequence - when second Observable will be subscribed, since subscription happens\n * immediately after failing check.\n *\n * @example <caption>Add fallback observable</caption>\n * const seconds = Rx.Observable.interval(1000);\n * const minutes = Rx.Observable.interval(60 * 1000);\n *\n * seconds.timeoutWith(900, minutes)\n *     .subscribe(\n *         value => console.log(value), // After 900ms, will start emitting `minutes`,\n *                                      // since first value of `seconds` will not arrive fast enough.\n *         err => console.log(err) // Would be called after 900ms in case of `timeout`,\n *                                 // but here will never be called.\n *     );\n *\n * @param {number|Date} due Number specifying period within which Observable must emit values\n *                          or Date specifying before when Observable should complete\n * @param {Observable<T>} withObservable Observable which will be subscribed if source fails timeout check.\n * @param {Scheduler} [scheduler] Scheduler controlling when timeout checks occur.\n * @return {Observable<T>} Observable that mirrors behaviour of source or, when timeout check fails, of an Observable\n *                          passed as a second parameter.\n * @method timeoutWith\n * @owner Observable\n */\nfunction timeoutWith(due, withObservable, scheduler) {\n    if (scheduler === void 0) { scheduler = rxjs_1.asyncScheduler; }\n    return operators_1.timeoutWith(due, withObservable, scheduler)(this);\n}\nexports.timeoutWith = timeoutWith;\n//# sourceMappingURL=timeoutWith.js.map","import { Subscriber } from '../Subscriber';\nexport function skip(count) {\n    return (source) => source.lift(new SkipOperator(count));\n}\nclass SkipOperator {\n    constructor(total) {\n        this.total = total;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new SkipSubscriber(subscriber, this.total));\n    }\n}\nclass SkipSubscriber extends Subscriber {\n    constructor(destination, total) {\n        super(destination);\n        this.total = total;\n        this.count = 0;\n    }\n    _next(x) {\n        if (++this.count > this.total) {\n            this.destination.next(x);\n        }\n    }\n}\n//# sourceMappingURL=skip.js.map","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {InjectionToken} from '@angular/core';\n\n/**\n * Injection token used to provide a grid list to a tile and to avoid circular imports.\n * @docs-private\n */\nexport const MAT_GRID_LIST = new InjectionToken<MatGridListBase>('MAT_GRID_LIST');\n\n/**\n * Base interface for a `MatGridList`.\n * @docs-private\n */\nexport interface MatGridListBase {\n  cols: number;\n  gutterSize: string;\n  rowHeight: number | string;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  Component,\n  ViewEncapsulation,\n  ElementRef,\n  Input,\n  Optional,\n  ContentChildren,\n  QueryList,\n  AfterContentInit,\n  Directive,\n  ChangeDetectionStrategy,\n  Inject,\n} from '@angular/core';\nimport {MatLine, setLines} from '@angular/material/core';\nimport {coerceNumberProperty, NumberInput} from '@angular/cdk/coercion';\nimport {MAT_GRID_LIST, MatGridListBase} from './grid-list-base';\n\n@Component({\n  selector: 'mat-grid-tile',\n  exportAs: 'matGridTile',\n  host: {\n    'class': 'mat-grid-tile',\n    // Ensures that the \"rowspan\" and \"colspan\" input value is reflected in\n    // the DOM. This is needed for the grid-tile harness.\n    '[attr.rowspan]': 'rowspan',\n    '[attr.colspan]': 'colspan'\n  },\n  templateUrl: 'grid-tile.html',\n  styleUrls: ['grid-list.css'],\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n})\nexport class MatGridTile {\n  _rowspan: number = 1;\n  _colspan: number = 1;\n\n  constructor(\n    private _element: ElementRef<HTMLElement>,\n    @Optional() @Inject(MAT_GRID_LIST) public _gridList?: MatGridListBase) {}\n\n  /** Amount of rows that the grid tile takes up. */\n  @Input()\n  get rowspan(): number { return this._rowspan; }\n  set rowspan(value: number) { this._rowspan = Math.round(coerceNumberProperty(value)); }\n\n  /** Amount of columns that the grid tile takes up. */\n  @Input()\n  get colspan(): number { return this._colspan; }\n  set colspan(value: number) { this._colspan = Math.round(coerceNumberProperty(value)); }\n\n  /**\n   * Sets the style of the grid-tile element.  Needs to be set manually to avoid\n   * \"Changed after checked\" errors that would occur with HostBinding.\n   */\n  _setStyle(property: string, value: any): void {\n    (this._element.nativeElement.style as any)[property] = value;\n  }\n\n  static ngAcceptInputType_rowspan: NumberInput;\n  static ngAcceptInputType_colspan: NumberInput;\n}\n\n@Component({\n  selector: 'mat-grid-tile-header, mat-grid-tile-footer',\n  templateUrl: 'grid-tile-text.html',\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  encapsulation: ViewEncapsulation.None,\n})\nexport class MatGridTileText implements AfterContentInit {\n  @ContentChildren(MatLine, {descendants: true}) _lines: QueryList<MatLine>;\n\n  constructor(private _element: ElementRef<HTMLElement>) {}\n\n  ngAfterContentInit() {\n    setLines(this._lines, this._element);\n  }\n}\n\n/**\n * Directive whose purpose is to add the mat- CSS styling to this selector.\n * @docs-private\n */\n@Directive({\n  selector: '[mat-grid-avatar], [matGridAvatar]',\n  host: {'class': 'mat-grid-avatar'}\n})\nexport class MatGridAvatarCssMatStyler {}\n\n/**\n * Directive whose purpose is to add the mat- CSS styling to this selector.\n * @docs-private\n */\n@Directive({\n  selector: 'mat-grid-tile-header',\n  host: {'class': 'mat-grid-tile-header'}\n})\nexport class MatGridTileHeaderCssMatStyler {}\n\n/**\n * Directive whose purpose is to add the mat- CSS styling to this selector.\n * @docs-private\n */\n@Directive({\n  selector: 'mat-grid-tile-footer',\n  host: {'class': 'mat-grid-tile-footer'}\n})\nexport class MatGridTileFooterCssMatStyler {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * Interface describing a tile.\n * @docs-private\n */\nexport interface Tile {\n  /** Amount of rows that the tile takes up. */\n  rowspan: number;\n  /** Amount of columns that the tile takes up. */\n  colspan: number;\n}\n\n/**\n * Class for determining, from a list of tiles, the (row, col) position of each of those tiles\n * in the grid. This is necessary (rather than just rendering the tiles in normal document flow)\n * because the tiles can have a rowspan.\n *\n * The positioning algorithm greedily places each tile as soon as it encounters a gap in the grid\n * large enough to accommodate it so that the tiles still render in the same order in which they\n * are given.\n *\n * The basis of the algorithm is the use of an array to track the already placed tiles. Each\n * element of the array corresponds to a column, and the value indicates how many cells in that\n * column are already occupied; zero indicates an empty cell. Moving \"down\" to the next row\n * decrements each value in the tracking array (indicating that the column is one cell closer to\n * being free).\n *\n * @docs-private\n */\nexport class TileCoordinator {\n  /** Tracking array (see class description). */\n  tracker: number[];\n\n  /** Index at which the search for the next gap will start. */\n  columnIndex: number = 0;\n\n  /** The current row index. */\n  rowIndex: number = 0;\n\n  /** Gets the total number of rows occupied by tiles */\n  get rowCount(): number { return this.rowIndex + 1; }\n\n  /**\n   * Gets the total span of rows occupied by tiles.\n   * Ex: A list with 1 row that contains a tile with rowspan 2 will have a total rowspan of 2.\n   */\n  get rowspan() {\n    const lastRowMax = Math.max(...this.tracker);\n    // if any of the tiles has a rowspan that pushes it beyond the total row count,\n    // add the difference to the rowcount\n    return lastRowMax > 1 ? this.rowCount + lastRowMax - 1 : this.rowCount;\n  }\n\n  /** The computed (row, col) position of each tile (the output). */\n  positions: TilePosition[];\n\n  /**\n   * Updates the tile positions.\n   * @param numColumns Amount of columns in the grid.\n   * @param tiles Tiles to be positioned.\n   */\n  update(numColumns: number, tiles: Tile[]) {\n    this.columnIndex = 0;\n    this.rowIndex = 0;\n\n    this.tracker = new Array(numColumns);\n    this.tracker.fill(0, 0, this.tracker.length);\n    this.positions = tiles.map(tile => this._trackTile(tile));\n  }\n\n  /** Calculates the row and col position of a tile. */\n  private _trackTile(tile: Tile): TilePosition {\n    // Find a gap large enough for this tile.\n    const gapStartIndex = this._findMatchingGap(tile.colspan);\n\n    // Place tile in the resulting gap.\n    this._markTilePosition(gapStartIndex, tile);\n\n    // The next time we look for a gap, the search will start at columnIndex, which should be\n    // immediately after the tile that has just been placed.\n    this.columnIndex = gapStartIndex + tile.colspan;\n\n    return new TilePosition(this.rowIndex, gapStartIndex);\n  }\n\n  /** Finds the next available space large enough to fit the tile. */\n  private _findMatchingGap(tileCols: number): number {\n    if (tileCols > this.tracker.length && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw Error(`mat-grid-list: tile with colspan ${tileCols} is wider than ` +\n                      `grid with cols=\"${this.tracker.length}\".`);\n    }\n\n    // Start index is inclusive, end index is exclusive.\n    let gapStartIndex = -1;\n    let gapEndIndex = -1;\n\n    // Look for a gap large enough to fit the given tile. Empty spaces are marked with a zero.\n    do {\n      // If we've reached the end of the row, go to the next row.\n      if (this.columnIndex + tileCols > this.tracker.length) {\n        this._nextRow();\n        gapStartIndex = this.tracker.indexOf(0, this.columnIndex);\n        gapEndIndex = this._findGapEndIndex(gapStartIndex);\n        continue;\n      }\n\n      gapStartIndex = this.tracker.indexOf(0, this.columnIndex);\n\n      // If there are no more empty spaces in this row at all, move on to the next row.\n      if (gapStartIndex == -1) {\n        this._nextRow();\n        gapStartIndex = this.tracker.indexOf(0, this.columnIndex);\n        gapEndIndex = this._findGapEndIndex(gapStartIndex);\n        continue;\n      }\n\n      gapEndIndex = this._findGapEndIndex(gapStartIndex);\n\n      // If a gap large enough isn't found, we want to start looking immediately after the current\n      // gap on the next iteration.\n      this.columnIndex = gapStartIndex + 1;\n\n      // Continue iterating until we find a gap wide enough for this tile. Since gapEndIndex is\n      // exclusive, gapEndIndex is 0 means we didn't find a gap and should continue.\n    } while ((gapEndIndex - gapStartIndex < tileCols) || (gapEndIndex == 0));\n\n    // If we still didn't manage to find a gap, ensure that the index is\n    // at least zero so the tile doesn't get pulled out of the grid.\n    return Math.max(gapStartIndex, 0);\n  }\n\n  /** Move \"down\" to the next row. */\n  private _nextRow(): void {\n    this.columnIndex = 0;\n    this.rowIndex++;\n\n    // Decrement all spaces by one to reflect moving down one row.\n    for (let i = 0; i < this.tracker.length; i++) {\n      this.tracker[i] = Math.max(0, this.tracker[i] - 1);\n    }\n  }\n\n  /**\n   * Finds the end index (exclusive) of a gap given the index from which to start looking.\n   * The gap ends when a non-zero value is found.\n   */\n  private _findGapEndIndex(gapStartIndex: number): number {\n    for (let i = gapStartIndex + 1; i < this.tracker.length; i++) {\n      if (this.tracker[i] != 0) {\n        return i;\n      }\n    }\n\n    // The gap ends with the end of the row.\n    return this.tracker.length;\n  }\n\n  /** Update the tile tracker to account for the given tile in the given space. */\n  private _markTilePosition(start: number, tile: Tile): void {\n    for (let i = 0; i < tile.colspan; i++) {\n      this.tracker[start + i] = tile.rowspan;\n    }\n  }\n}\n\n/**\n * Simple data structure for tile position (row, col).\n * @docs-private\n */\nexport class TilePosition {\n  constructor(public row: number, public col: number) {}\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {QueryList} from '@angular/core';\nimport {MatGridTile} from './grid-tile';\nimport {TileCoordinator} from './tile-coordinator';\n\n/**\n * RegExp that can be used to check whether a value will\n * be allowed inside a CSS `calc()` expression.\n */\nconst cssCalcAllowedValue = /^-?\\d+((\\.\\d+)?[A-Za-z%$]?)+$/;\n\n/** Object that can be styled by the `TileStyler`. */\nexport interface TileStyleTarget {\n  _setListStyle(style: [string, string | null] | null): void;\n  _tiles: QueryList<MatGridTile>;\n}\n\n/**\n * Sets the style properties for an individual tile, given the position calculated by the\n * Tile Coordinator.\n * @docs-private\n */\nexport abstract class TileStyler {\n  _gutterSize: string;\n  _rows: number = 0;\n  _rowspan: number = 0;\n  _cols: number;\n  _direction: string;\n\n  /**\n   * Adds grid-list layout info once it is available. Cannot be processed in the constructor\n   * because these properties haven't been calculated by that point.\n   *\n   * @param gutterSize Size of the grid's gutter.\n   * @param tracker Instance of the TileCoordinator.\n   * @param cols Amount of columns in the grid.\n   * @param direction Layout direction of the grid.\n   */\n  init(gutterSize: string, tracker: TileCoordinator, cols: number, direction: string): void {\n    this._gutterSize = normalizeUnits(gutterSize);\n    this._rows = tracker.rowCount;\n    this._rowspan = tracker.rowspan;\n    this._cols = cols;\n    this._direction = direction;\n  }\n\n  /**\n   * Computes the amount of space a single 1x1 tile would take up (width or height).\n   * Used as a basis for other calculations.\n   * @param sizePercent Percent of the total grid-list space that one 1x1 tile would take up.\n   * @param gutterFraction Fraction of the gutter size taken up by one 1x1 tile.\n   * @return The size of a 1x1 tile as an expression that can be evaluated via CSS calc().\n   */\n  getBaseTileSize(sizePercent: number, gutterFraction: number): string {\n    // Take the base size percent (as would be if evenly dividing the size between cells),\n    // and then subtracting the size of one gutter. However, since there are no gutters on the\n    // edges, each tile only uses a fraction (gutterShare = numGutters / numCells) of the gutter\n    // size. (Imagine having one gutter per tile, and then breaking up the extra gutter on the\n    // edge evenly among the cells).\n    return `(${sizePercent}% - (${this._gutterSize} * ${gutterFraction}))`;\n  }\n\n\n  /**\n   * Gets The horizontal or vertical position of a tile, e.g., the 'top' or 'left' property value.\n   * @param offset Number of tiles that have already been rendered in the row/column.\n   * @param baseSize Base size of a 1x1 tile (as computed in getBaseTileSize).\n   * @return Position of the tile as a CSS calc() expression.\n   */\n  getTilePosition(baseSize: string, offset: number): string {\n    // The position comes the size of a 1x1 tile plus gutter for each previous tile in the\n    // row/column (offset).\n    return offset === 0 ? '0' : calc(`(${baseSize} + ${this._gutterSize}) * ${offset}`);\n  }\n\n\n  /**\n   * Gets the actual size of a tile, e.g., width or height, taking rowspan or colspan into account.\n   * @param baseSize Base size of a 1x1 tile (as computed in getBaseTileSize).\n   * @param span The tile's rowspan or colspan.\n   * @return Size of the tile as a CSS calc() expression.\n   */\n  getTileSize(baseSize: string, span: number): string {\n    return `(${baseSize} * ${span}) + (${span - 1} * ${this._gutterSize})`;\n  }\n\n\n  /**\n   * Sets the style properties to be applied to a tile for the given row and column index.\n   * @param tile Tile to which to apply the styling.\n   * @param rowIndex Index of the tile's row.\n   * @param colIndex Index of the tile's column.\n   */\n  setStyle(tile: MatGridTile, rowIndex: number, colIndex: number): void {\n    // Percent of the available horizontal space that one column takes up.\n    let percentWidthPerTile = 100 / this._cols;\n\n    // Fraction of the vertical gutter size that each column takes up.\n    // For example, if there are 5 columns, each column uses 4/5 = 0.8 times the gutter width.\n    let gutterWidthFractionPerTile = (this._cols - 1) / this._cols;\n\n    this.setColStyles(tile, colIndex, percentWidthPerTile, gutterWidthFractionPerTile);\n    this.setRowStyles(tile, rowIndex, percentWidthPerTile, gutterWidthFractionPerTile);\n  }\n\n  /** Sets the horizontal placement of the tile in the list. */\n  setColStyles(tile: MatGridTile, colIndex: number, percentWidth: number,\n               gutterWidth: number) {\n    // Base horizontal size of a column.\n    let baseTileWidth = this.getBaseTileSize(percentWidth, gutterWidth);\n\n    // The width and horizontal position of each tile is always calculated the same way, but the\n    // height and vertical position depends on the rowMode.\n    let side = this._direction === 'rtl' ? 'right' : 'left';\n    tile._setStyle(side, this.getTilePosition(baseTileWidth, colIndex));\n    tile._setStyle('width', calc(this.getTileSize(baseTileWidth, tile.colspan)));\n  }\n\n  /**\n   * Calculates the total size taken up by gutters across one axis of a list.\n   */\n  getGutterSpan(): string {\n    return `${this._gutterSize} * (${this._rowspan} - 1)`;\n  }\n\n  /**\n   * Calculates the total size taken up by tiles across one axis of a list.\n   * @param tileHeight Height of the tile.\n   */\n  getTileSpan(tileHeight: string): string {\n    return `${this._rowspan} * ${this.getTileSize(tileHeight, 1)}`;\n  }\n\n  /**\n   * Sets the vertical placement of the tile in the list.\n   * This method will be implemented by each type of TileStyler.\n   * @docs-private\n   */\n  abstract setRowStyles(tile: MatGridTile, rowIndex: number, percentWidth: number,\n                        gutterWidth: number): void;\n\n  /**\n   * Calculates the computed height and returns the correct style property to set.\n   * This method can be implemented by each type of TileStyler.\n   * @docs-private\n   */\n  getComputedHeight(): [string, string] | null { return null; }\n\n  /**\n   * Called when the tile styler is swapped out with a different one. To be used for cleanup.\n   * @param list Grid list that the styler was attached to.\n   * @docs-private\n   */\n  abstract reset(list: TileStyleTarget): void;\n}\n\n\n/**\n * This type of styler is instantiated when the user passes in a fixed row height.\n * Example `<mat-grid-list cols=\"3\" rowHeight=\"100px\">`\n * @docs-private\n */\nexport class FixedTileStyler extends TileStyler {\n\n  constructor(public fixedRowHeight: string) { super(); }\n\n  init(gutterSize: string, tracker: TileCoordinator, cols: number, direction: string) {\n    super.init(gutterSize, tracker, cols, direction);\n    this.fixedRowHeight = normalizeUnits(this.fixedRowHeight);\n\n    if (!cssCalcAllowedValue.test(this.fixedRowHeight) &&\n      (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw Error(`Invalid value \"${this.fixedRowHeight}\" set as rowHeight.`);\n    }\n  }\n\n  setRowStyles(tile: MatGridTile, rowIndex: number): void {\n    tile._setStyle('top', this.getTilePosition(this.fixedRowHeight, rowIndex));\n    tile._setStyle('height', calc(this.getTileSize(this.fixedRowHeight, tile.rowspan)));\n  }\n\n  getComputedHeight(): [string, string] {\n    return [\n      'height', calc(`${this.getTileSpan(this.fixedRowHeight)} + ${this.getGutterSpan()}`)\n    ];\n  }\n\n  reset(list: TileStyleTarget) {\n    list._setListStyle(['height', null]);\n\n    if (list._tiles) {\n      list._tiles.forEach(tile => {\n        tile._setStyle('top', null);\n        tile._setStyle('height', null);\n      });\n    }\n  }\n}\n\n\n/**\n * This type of styler is instantiated when the user passes in a width:height ratio\n * for the row height.  Example `<mat-grid-list cols=\"3\" rowHeight=\"3:1\">`\n * @docs-private\n */\nexport class RatioTileStyler extends TileStyler {\n\n  /** Ratio width:height given by user to determine row height. */\n  rowHeightRatio: number;\n  baseTileHeight: string;\n\n  constructor(value: string) {\n    super();\n    this._parseRatio(value);\n  }\n\n  setRowStyles(tile: MatGridTile, rowIndex: number, percentWidth: number,\n               gutterWidth: number): void {\n    let percentHeightPerTile = percentWidth / this.rowHeightRatio;\n    this.baseTileHeight = this.getBaseTileSize(percentHeightPerTile, gutterWidth);\n\n    // Use padding-top and margin-top to maintain the given aspect ratio, as\n    // a percentage-based value for these properties is applied versus the *width* of the\n    // containing block. See http://www.w3.org/TR/CSS2/box.html#margin-properties\n    tile._setStyle('marginTop', this.getTilePosition(this.baseTileHeight, rowIndex));\n    tile._setStyle('paddingTop', calc(this.getTileSize(this.baseTileHeight, tile.rowspan)));\n  }\n\n  getComputedHeight(): [string, string] {\n    return [\n      'paddingBottom', calc(`${this.getTileSpan(this.baseTileHeight)} + ${this.getGutterSpan()}`)\n    ];\n  }\n\n  reset(list: TileStyleTarget) {\n    list._setListStyle(['paddingBottom', null]);\n\n    list._tiles.forEach(tile => {\n      tile._setStyle('marginTop', null);\n      tile._setStyle('paddingTop', null);\n    });\n  }\n\n  private _parseRatio(value: string): void {\n    const ratioParts = value.split(':');\n\n    if (ratioParts.length !== 2 && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw Error(`mat-grid-list: invalid ratio given for row-height: \"${value}\"`);\n    }\n\n    this.rowHeightRatio = parseFloat(ratioParts[0]) / parseFloat(ratioParts[1]);\n  }\n}\n\n/**\n * This type of styler is instantiated when the user selects a \"fit\" row height mode.\n * In other words, the row height will reflect the total height of the container divided\n * by the number of rows.  Example `<mat-grid-list cols=\"3\" rowHeight=\"fit\">`\n *\n * @docs-private\n */\nexport class FitTileStyler extends TileStyler {\n  setRowStyles(tile: MatGridTile, rowIndex: number): void {\n    // Percent of the available vertical space that one row takes up.\n    let percentHeightPerTile = 100 / this._rowspan;\n\n    // Fraction of the horizontal gutter size that each column takes up.\n    let gutterHeightPerTile = (this._rows - 1) / this._rows;\n\n    // Base vertical size of a column.\n    let baseTileHeight = this.getBaseTileSize(percentHeightPerTile, gutterHeightPerTile);\n\n    tile._setStyle('top', this.getTilePosition(baseTileHeight, rowIndex));\n    tile._setStyle('height', calc(this.getTileSize(baseTileHeight, tile.rowspan)));\n  }\n\n  reset(list: TileStyleTarget) {\n    if (list._tiles) {\n      list._tiles.forEach(tile => {\n        tile._setStyle('top', null);\n        tile._setStyle('height', null);\n      });\n    }\n  }\n}\n\n\n/** Wraps a CSS string in a calc function */\nfunction calc(exp: string): string {\n  return `calc(${exp})`;\n}\n\n\n/** Appends pixels to a CSS string if no units are given. */\nfunction normalizeUnits(value: string): string {\n  return value.match(/([A-Za-z%]+)$/) ? value : `${value}px`;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  Component,\n  ViewEncapsulation,\n  AfterContentChecked,\n  OnInit,\n  Input,\n  ContentChildren,\n  QueryList,\n  ElementRef,\n  Optional,\n  ChangeDetectionStrategy,\n} from '@angular/core';\nimport {MatGridTile} from './grid-tile';\nimport {TileCoordinator} from './tile-coordinator';\nimport {\n  TileStyler,\n  FitTileStyler,\n  RatioTileStyler,\n  FixedTileStyler,\n  TileStyleTarget,\n} from './tile-styler';\nimport {Directionality} from '@angular/cdk/bidi';\nimport {coerceNumberProperty, NumberInput} from '@angular/cdk/coercion';\nimport {MAT_GRID_LIST, MatGridListBase} from './grid-list-base';\n\n\n// TODO(kara): Conditional (responsive) column count / row size.\n// TODO(kara): Re-layout on window resize / media change (debounced).\n// TODO(kara): gridTileHeader and gridTileFooter.\n\nconst MAT_FIT_MODE = 'fit';\n\n@Component({\n  selector: 'mat-grid-list',\n  exportAs: 'matGridList',\n  templateUrl: 'grid-list.html',\n  styleUrls: ['grid-list.css'],\n  host: {\n    'class': 'mat-grid-list',\n    // Ensures that the \"cols\" input value is reflected in the DOM. This is\n    // needed for the grid-list harness.\n    '[attr.cols]': 'cols',\n  },\n  providers: [{\n    provide: MAT_GRID_LIST,\n    useExisting: MatGridList\n  }],\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  encapsulation: ViewEncapsulation.None,\n})\nexport class MatGridList implements MatGridListBase, OnInit, AfterContentChecked, TileStyleTarget {\n  /** Number of columns being rendered. */\n  private _cols: number;\n\n  /** Used for determiningthe position of each tile in the grid. */\n  private _tileCoordinator: TileCoordinator;\n\n  /**\n   * Row height value passed in by user. This can be one of three types:\n   * - Number value (ex: \"100px\"):  sets a fixed row height to that value\n   * - Ratio value (ex: \"4:3\"): sets the row height based on width:height ratio\n   * - \"Fit\" mode (ex: \"fit\"): sets the row height to total height divided by number of rows\n   */\n  private _rowHeight: string;\n\n  /** The amount of space between tiles. This will be something like '5px' or '2em'. */\n  private _gutter: string = '1px';\n\n  /** Sets position and size styles for a tile */\n  private _tileStyler: TileStyler;\n\n  /** Query list of tiles that are being rendered. */\n  @ContentChildren(MatGridTile, {descendants: true}) _tiles: QueryList<MatGridTile>;\n\n  constructor(private _element: ElementRef<HTMLElement>,\n              @Optional() private _dir: Directionality) {}\n\n  /** Amount of columns in the grid list. */\n  @Input()\n  get cols(): number { return this._cols; }\n  set cols(value: number) {\n    this._cols = Math.max(1, Math.round(coerceNumberProperty(value)));\n  }\n\n  /** Size of the grid list's gutter in pixels. */\n  @Input()\n  get gutterSize(): string { return this._gutter; }\n  set gutterSize(value: string) { this._gutter = `${value == null ? '' : value}`; }\n\n  /** Set internal representation of row height from the user-provided value. */\n  @Input()\n  get rowHeight(): string | number { return this._rowHeight; }\n  set rowHeight(value: string | number) {\n    const newValue = `${value == null ? '' : value}`;\n\n    if (newValue !== this._rowHeight) {\n      this._rowHeight = newValue;\n      this._setTileStyler(this._rowHeight);\n    }\n  }\n\n  ngOnInit() {\n    this._checkCols();\n    this._checkRowHeight();\n  }\n\n  /**\n   * The layout calculation is fairly cheap if nothing changes, so there's little cost\n   * to run it frequently.\n   */\n  ngAfterContentChecked() {\n    this._layoutTiles();\n  }\n\n  /** Throw a friendly error if cols property is missing */\n  private _checkCols() {\n    if (!this.cols && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw Error(`mat-grid-list: must pass in number of columns. ` +\n                  `Example: <mat-grid-list cols=\"3\">`);\n    }\n  }\n\n  /** Default to equal width:height if rowHeight property is missing */\n  private _checkRowHeight(): void {\n    if (!this._rowHeight) {\n      this._setTileStyler('1:1');\n    }\n  }\n\n  /** Creates correct Tile Styler subtype based on rowHeight passed in by user */\n  private _setTileStyler(rowHeight: string): void {\n    if (this._tileStyler) {\n      this._tileStyler.reset(this);\n    }\n\n    if (rowHeight === MAT_FIT_MODE) {\n      this._tileStyler = new FitTileStyler();\n    } else if (rowHeight && rowHeight.indexOf(':') > -1) {\n      this._tileStyler = new RatioTileStyler(rowHeight);\n    } else {\n      this._tileStyler = new FixedTileStyler(rowHeight);\n    }\n  }\n\n  /** Computes and applies the size and position for all children grid tiles. */\n  private _layoutTiles(): void {\n    if (!this._tileCoordinator) {\n      this._tileCoordinator = new TileCoordinator();\n    }\n\n\n    const tracker = this._tileCoordinator;\n    const tiles = this._tiles.filter(tile => !tile._gridList || tile._gridList === this);\n    const direction = this._dir ? this._dir.value : 'ltr';\n\n    this._tileCoordinator.update(this.cols, tiles);\n    this._tileStyler.init(this.gutterSize, tracker, this.cols, direction);\n\n    tiles.forEach((tile, index) => {\n      const pos = tracker.positions[index];\n      this._tileStyler.setStyle(tile, pos.row, pos.col);\n    });\n\n    this._setListStyle(this._tileStyler.getComputedHeight());\n  }\n\n  /** Sets style on the main grid-list element, given the style name and value. */\n  _setListStyle(style: [string, string | null] | null): void {\n    if (style) {\n      (this._element.nativeElement.style as any)[style[0]] = style[1];\n    }\n  }\n\n  static ngAcceptInputType_cols: NumberInput;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgModule} from '@angular/core';\nimport {MatLineModule, MatCommonModule} from '@angular/material/core';\nimport {\n  MatGridTile, MatGridTileText, MatGridTileFooterCssMatStyler,\n  MatGridTileHeaderCssMatStyler, MatGridAvatarCssMatStyler\n} from './grid-tile';\nimport {MatGridList} from './grid-list';\n\n\n@NgModule({\n  imports: [MatLineModule, MatCommonModule],\n  exports: [\n    MatGridList,\n    MatGridTile,\n    MatGridTileText,\n    MatLineModule,\n    MatCommonModule,\n    MatGridTileHeaderCssMatStyler,\n    MatGridTileFooterCssMatStyler,\n    MatGridAvatarCssMatStyler\n  ],\n  declarations: [\n    MatGridList,\n    MatGridTile,\n    MatGridTileText,\n    MatGridTileHeaderCssMatStyler,\n    MatGridTileFooterCssMatStyler,\n    MatGridAvatarCssMatStyler\n  ],\n})\nexport class MatGridListModule {}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './grid-list-module';\nexport * from './grid-list';\nexport * from './grid-tile';\n\n// Privately exported for the grid-list harness.\nexport {TileCoordinator as ɵTileCoordinator} from './tile-coordinator';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n\nexport {MAT_GRID_LIST as ɵangular_material_src_material_grid_list_grid_list_a,MatGridListBase as ɵangular_material_src_material_grid_list_grid_list_b} from './grid-list-base';","import { AsyncScheduler } from './AsyncScheduler';\nexport class AnimationFrameScheduler extends AsyncScheduler {\n    flush(action) {\n        this.active = true;\n        this.scheduled = undefined;\n        const { actions } = this;\n        let error;\n        let index = -1;\n        let count = actions.length;\n        action = action || actions.shift();\n        do {\n            if (error = action.execute(action.state, action.delay)) {\n                break;\n            }\n        } while (++index < count && (action = actions.shift()));\n        this.active = false;\n        if (error) {\n            while (++index < count && (action = actions.shift())) {\n                action.unsubscribe();\n            }\n            throw error;\n        }\n    }\n}\n//# sourceMappingURL=AnimationFrameScheduler.js.map","import { OuterSubscriber } from '../OuterSubscriber';\nimport { subscribeToResult } from '../util/subscribeToResult';\nexport function withLatestFrom(...args) {\n    return (source) => {\n        let project;\n        if (typeof args[args.length - 1] === 'function') {\n            project = args.pop();\n        }\n        const observables = args;\n        return source.lift(new WithLatestFromOperator(observables, project));\n    };\n}\nclass WithLatestFromOperator {\n    constructor(observables, project) {\n        this.observables = observables;\n        this.project = project;\n    }\n    call(subscriber, source) {\n        return source.subscribe(new WithLatestFromSubscriber(subscriber, this.observables, this.project));\n    }\n}\nclass WithLatestFromSubscriber extends OuterSubscriber {\n    constructor(destination, observables, project) {\n        super(destination);\n        this.observables = observables;\n        this.project = project;\n        this.toRespond = [];\n        const len = observables.length;\n        this.values = new Array(len);\n        for (let i = 0; i < len; i++) {\n            this.toRespond.push(i);\n        }\n        for (let i = 0; i < len; i++) {\n            let observable = observables[i];\n            this.add(subscribeToResult(this, observable, undefined, i));\n        }\n    }\n    notifyNext(_outerValue, innerValue, outerIndex) {\n        this.values[outerIndex] = innerValue;\n        const toRespond = this.toRespond;\n        if (toRespond.length > 0) {\n            const found = toRespond.indexOf(outerIndex);\n            if (found !== -1) {\n                toRespond.splice(found, 1);\n            }\n        }\n    }\n    notifyComplete() {\n    }\n    _next(value) {\n        if (this.toRespond.length === 0) {\n            const args = [value, ...this.values];\n            if (this.project) {\n                this._tryProject(args);\n            }\n            else {\n                this.destination.next(args);\n            }\n        }\n    }\n    _tryProject(args) {\n        let result;\n        try {\n            result = this.project.apply(this, args);\n        }\n        catch (err) {\n            this.destination.error(err);\n            return;\n        }\n        this.destination.next(result);\n    }\n}\n//# sourceMappingURL=withLatestFrom.js.map","import { SimpleOuterSubscriber, innerSubscribe, SimpleInnerSubscriber } from '../innerSubscribe';\nexport function exhaust() {\n    return (source) => source.lift(new SwitchFirstOperator());\n}\nclass SwitchFirstOperator {\n    call(subscriber, source) {\n        return source.subscribe(new SwitchFirstSubscriber(subscriber));\n    }\n}\nclass SwitchFirstSubscriber extends SimpleOuterSubscriber {\n    constructor(destination) {\n        super(destination);\n        this.hasCompleted = false;\n        this.hasSubscription = false;\n    }\n    _next(value) {\n        if (!this.hasSubscription) {\n            this.hasSubscription = true;\n            this.add(innerSubscribe(value, new SimpleInnerSubscriber(this)));\n        }\n    }\n    _complete() {\n        this.hasCompleted = true;\n        if (!this.hasSubscription) {\n            this.destination.complete();\n        }\n    }\n    notifyComplete() {\n        this.hasSubscription = false;\n        if (this.hasCompleted) {\n            this.destination.complete();\n        }\n    }\n}\n//# sourceMappingURL=exhaust.js.map","import { Subscriber } from './Subscriber';\nimport { Observable } from './Observable';\nimport { subscribeTo } from './util/subscribeTo';\nexport class SimpleInnerSubscriber extends Subscriber {\n    constructor(parent) {\n        super();\n        this.parent = parent;\n    }\n    _next(value) {\n        this.parent.notifyNext(value);\n    }\n    _error(error) {\n        this.parent.notifyError(error);\n        this.unsubscribe();\n    }\n    _complete() {\n        this.parent.notifyComplete();\n        this.unsubscribe();\n    }\n}\nexport class ComplexInnerSubscriber extends Subscriber {\n    constructor(parent, outerValue, outerIndex) {\n        super();\n        this.parent = parent;\n        this.outerValue = outerValue;\n        this.outerIndex = outerIndex;\n    }\n    _next(value) {\n        this.parent.notifyNext(this.outerValue, value, this.outerIndex, this);\n    }\n    _error(error) {\n        this.parent.notifyError(error);\n        this.unsubscribe();\n    }\n    _complete() {\n        this.parent.notifyComplete(this);\n        this.unsubscribe();\n    }\n}\nexport class SimpleOuterSubscriber extends Subscriber {\n    notifyNext(innerValue) {\n        this.destination.next(innerValue);\n    }\n    notifyError(err) {\n        this.destination.error(err);\n    }\n    notifyComplete() {\n        this.destination.complete();\n    }\n}\nexport class ComplexOuterSubscriber extends Subscriber {\n    notifyNext(_outerValue, innerValue, _outerIndex, _innerSub) {\n        this.destination.next(innerValue);\n    }\n    notifyError(error) {\n        this.destination.error(error);\n    }\n    notifyComplete(_innerSub) {\n        this.destination.complete();\n    }\n}\nexport function innerSubscribe(result, innerSubscriber) {\n    if (innerSubscriber.closed) {\n        return undefined;\n    }\n    if (result instanceof Observable) {\n        return result.subscribe(innerSubscriber);\n    }\n    return subscribeTo(result)(innerSubscriber);\n}\n//# sourceMappingURL=innerSubscribe.js.map"],"sourceRoot":"webpack:///"}