针对RC.5更新

使用Angular 2，我们可以debounceTime()在窗体控件的valueChanges可观察对象上使用RxJS运算符进行反跳：

import {Component}   from '@angular/core';
import {FormControl} from '@angular/forms';
import {Observable}  from 'rxjs/Observable';
import 'rxjs/add/operator/debounceTime';
import 'rxjs/add/operator/throttleTime';
import 'rxjs/add/observable/fromEvent';

@Component({
  selector: 'my-app',
  template: `<input type=text [value]="firstName" [formControl]="firstNameControl">
    <br>{{firstName}}`
})
export class AppComponent {
  firstName        = 'Name';
  firstNameControl = new FormControl();
  formCtrlSub: Subscription;
  resizeSub:   Subscription;
  ngOnInit() {
    // debounce keystroke events
    this.formCtrlSub = this.firstNameControl.valueChanges
      .debounceTime(1000)
      .subscribe(newValue => this.firstName = newValue);
    // throttle resize events
    this.resizeSub = Observable.fromEvent(window, 'resize')
      .throttleTime(200)
      .subscribe(e => {
        console.log('resize event', e);
        this.firstName += '*';  // change something to show it worked
      });
  }
  ngDoCheck() { console.log('change detection'); }
  ngOnDestroy() {
    this.formCtrlSub.unsubscribe();
    this.resizeSub  .unsubscribe();
  }
}

[Plunker](http://plnkr.co/edit/A8Ms99r7sazUeZS90z7K?p=preview)

上面的代码还包括一个如何限制窗口调整大小事件的示例，如@albanx在下面的注释中所要求的。

尽管上面的代码可能是这样做的Angular方式，但效率不高。每个击键和每个调整大小事件（即使它们被去抖和抑制）都将导致更改检测运行。换句话说，
去抖动和节流不影响更改检测运行的频率。（我找到了TobiasBosch的GitHub评论，对此进行了确认。）您可以在运行插入器时看到此消息，并ngDoCheck()在键入输入框或调整窗口大小时看到被调用了多少次。（使用蓝色的“
x”按钮在单独的窗口中运行导航按钮，以查看调整大小事件。）

一种更有效的技术是根据事件本身在Angular的“区域”之外创建RxJS
Observables。这样，每次事件触发时都不会调用更改检测。然后，在您的订阅回调方法中，手动触发更改检测-即，您控制何时调用更改检测：

import {Component, NgZone, ChangeDetectorRef, ApplicationRef, 
        ViewChild, ElementRef} from '@angular/core';
import {Observable} from 'rxjs/Observable';
import 'rxjs/add/operator/debounceTime';
import 'rxjs/add/operator/throttleTime';
import 'rxjs/add/observable/fromEvent';

@Component({
  selector: 'my-app',
  template: `<input #input type=text [value]="firstName">
    <br>{{firstName}}`
})
export class AppComponent {
  firstName = 'Name';
  keyupSub:  Subscription;
  resizeSub: Subscription;
  @ViewChild('input') inputElRef: ElementRef;
  constructor(private ngzone: NgZone, private cdref: ChangeDetectorRef,
    private appref: ApplicationRef) {}
  ngAfterViewInit() {
    this.ngzone.runOutsideAngular( () => {
      this.keyupSub = Observable.fromEvent(this.inputElRef.nativeElement, 'keyup')
        .debounceTime(1000)
        .subscribe(keyboardEvent => {
          this.firstName = keyboardEvent.target.value;
          this.cdref.detectChanges();
        });
      this.resizeSub = Observable.fromEvent(window, 'resize')
        .throttleTime(200)
        .subscribe(e => {
          console.log('resize event', e);
          this.firstName += '*';  // change something to show it worked
          this.cdref.detectChanges();
        });
    });
  }
  ngDoCheck() { console.log('cd'); }
  ngOnDestroy() {
    this.keyupSub .unsubscribe();
    this.resizeSub.unsubscribe();
  }
}

[Plunker](http://plnkr.co/edit/E77SzTXvBnaBL4SzyOgh?p=preview)

我使用ngAfterViewInit()而不是ngOnInit()确保inputElRef已定义。

detectChanges()将对此组件及其子组件运行更改检测。如果您希望从根组件运行更改检测（即运行完整的更改检测检查），请ApplicationRef.tick()改用。（我ApplicationRef.tick()在插件的注释中打了个电话。）请注意，tick()将导致ngDoCheck()被调用。