69 lines
1.9 KiB
TypeScript
69 lines
1.9 KiB
TypeScript
/**
|
|
* @license
|
|
* Copyright Google Inc. 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 {Component} from '@angular/core';
|
|
import {Observable, Observer} from 'rxjs';
|
|
|
|
// #docregion AsyncPipePromise
|
|
@Component({
|
|
selector: 'async-promise-pipe',
|
|
template: `<div>
|
|
<code>promise|async</code>:
|
|
<button (click)="clicked()">{{ arrived ? 'Reset' : 'Resolve' }}</button>
|
|
<span>Wait for it... {{ greeting | async }}</span>
|
|
</div>`
|
|
})
|
|
export class AsyncPromisePipeComponent {
|
|
greeting: Promise<string>|null = null;
|
|
arrived: boolean = false;
|
|
|
|
private resolve: Function|null = null;
|
|
|
|
constructor() { this.reset(); }
|
|
|
|
reset() {
|
|
this.arrived = false;
|
|
this.greeting = new Promise<string>((resolve, reject) => { this.resolve = resolve; });
|
|
}
|
|
|
|
clicked() {
|
|
if (this.arrived) {
|
|
this.reset();
|
|
} else {
|
|
this.resolve !('hi there!');
|
|
this.arrived = true;
|
|
}
|
|
}
|
|
}
|
|
// #enddocregion
|
|
|
|
// #docregion AsyncPipeObservable
|
|
@Component({
|
|
selector: 'async-observable-pipe',
|
|
template: '<div><code>observable|async</code>: Time: {{ time | async }}</div>'
|
|
})
|
|
export class AsyncObservablePipeComponent {
|
|
time = new Observable<string>((observer: Observer<string>) => {
|
|
setInterval(() => observer.next(new Date().toString()), 1000);
|
|
});
|
|
}
|
|
// #enddocregion
|
|
|
|
// For some reason protractor hangs on setInterval. So we will run outside of angular zone so that
|
|
// protractor will not see us. Also we want to have this outside the docregion so as not to confuse
|
|
// the reader.
|
|
function setInterval(fn: Function, delay: number) {
|
|
const zone = (window as any)['Zone'].current;
|
|
let rootZone = zone;
|
|
while (rootZone.parent) {
|
|
rootZone = rootZone.parent;
|
|
}
|
|
rootZone.run(
|
|
() => { window.setInterval(function() { zone.run(fn, this, arguments as any); }, delay); });
|
|
}
|