angular-cn/public/docs/_examples/server-communication/ts/app/wiki/wiki.component.ts

// #docregion
import { Component }        from '@angular/core';
import { Observable }       from 'rxjs/Observable';

import { WikipediaService } from './wikipedia.service';

@Component({
  selector: 'my-wiki',
  template: `
    <h1>Wikipedia Demo</h1>
    <p><i>Fetches after each keystroke</i></p>

    <input #term (keyup)="search(term.value)"/>

    <ul>
      <li *ngFor="let item of items | async">{{item}}</li>
    </ul>
  `,
  providers: [WikipediaService]
})
export class WikiComponent {
  items: Observable<string[]>;

  constructor (private wikipediaService: WikipediaService) {}

  search (term: string) {
    this.items = this.wikipediaService.search(term);
  }
}