@angular/core
Version:
Angular - the core framework
73 lines • 6.71 kB
JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { ChangeDetectorRef } from '../change_detection/change_detector_ref';
/**
* Represents an Angular [view](guide/glossary#view "Definition").
*
* @see {@link ChangeDetectorRef#usage-notes Change detection usage}
*
* @publicApi
*/
export class ViewRef extends ChangeDetectorRef {
}
/**
* Represents an Angular [view](guide/glossary#view) in a view container.
* An [embedded view](guide/glossary#view-tree) can be referenced from a component
* other than the hosting component whose template defines it, or it can be defined
* independently by a `TemplateRef`.
*
* Properties of elements in a view can change, but the structure (number and order) of elements in
* a view cannot. Change the structure of elements by inserting, moving, or
* removing nested views in a view container.
*
* @see `ViewContainerRef`
*
* @usageNotes
*
* The following template breaks down into two separate `TemplateRef` instances,
* an outer one and an inner one.
*
* ```
* Count: {{items.length}}
* <ul>
* <li *ngFor="let item of items">{{item}}</li>
* </ul>
* ```
*
* This is the outer `TemplateRef`:
*
* ```
* Count: {{items.length}}
* <ul>
* <ng-template ngFor let-item [ngForOf]="items"></ng-template>
* </ul>
* ```
*
* This is the inner `TemplateRef`:
*
* ```
* <li>{{item}}</li>
* ```
*
* The outer and inner `TemplateRef` instances are assembled into views as follows:
*
* ```
* <!-- ViewRef: outer-0 -->
* Count: 2
* <ul>
* <ng-template view-container-ref></ng-template>
* <!-- ViewRef: inner-1 --><li>first</li><!-- /ViewRef: inner-1 -->
* <!-- ViewRef: inner-2 --><li>second</li><!-- /ViewRef: inner-2 -->
* </ul>
* <!-- /ViewRef: outer-0 -->
* ```
* @publicApi
*/
export class EmbeddedViewRef extends ViewRef {
}
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