angular-docs-cn/public/docs/_examples/lifecycle-hooks/ts/app/peek-a-boo-parent.component.ts

55 lines
1.3 KiB
TypeScript

// #docregion
import {Component} from 'angular2/core';
import {PeekABooComponent} from './peek-a-boo.component'
import {LoggerService} from './logger.service';
@Component({
selector: 'peek-a-boo-parent',
template: `
<div class="parent">
<h2>Peek-A-Boo</h2>
<button (click)="toggleChild()">
{{hasChild ? 'Destroy' : 'Create'}} PeekABooComponent
</button>
<button (click)="updateHero()" [hidden]="!hasChild">Update Hero</button>
<peek-a-boo *ngIf="hasChild" [name]="heroName">
</peek-a-boo>
<h4>-- Lifecycle Hook Log --</h4>
<div *ngFor="#msg of hookLog">{{msg}}</div>
</div>
`,
styles: ['.parent {background: moccasin; padding: 10px; margin:100px 8px}'],
directives: [PeekABooComponent],
providers: [LoggerService]
})
export class PeekABooParentComponent {
hasChild = false;
hookLog:string[];
heroName = 'Windstorm';
private _logger:LoggerService;
constructor(logger:LoggerService){
this._logger = logger;
this.hookLog = logger.logs;
}
toggleChild() {
this.hasChild = !this.hasChild;
if (this.hasChild) {
this.heroName = 'Windstorm';
this._logger.clear(); // clear log on create
}
this._logger.tick();
}
updateHero() {
this.heroName += '!';
this._logger.tick();
}
}