debounce change detection demo

<!DOCTYPE html>
<html>

  <head>
    <base href="." />
    <title>angular playground</title>
    <link rel="stylesheet" href="style.css" />
    <script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
    <script src="https://unpkg.com/zone.js/dist/zone.js"></script>
    <script src="https://unpkg.com/zone.js/dist/long-stack-trace-zone.js"></script>
    <script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script>
    <script src="https://unpkg.com/systemjs@0.19.31/dist/system.js"></script>
    <script src="config.js"></script>
    <script>
    System.import('app')
      .catch(console.error.bind(console));
  </script>
  </head>

  <body>
    <my-app>
    loading...
  </my-app>
  </body>

</html>

/* Styles go here */

### Angular Starter Plunker - Typescript

System.config({
  //use typescript for compilation
  transpiler: 'typescript',
  //typescript compiler options
  typescriptOptions: {
    emitDecoratorMetadata: true
  },
  paths: {
    'npm:': 'https://unpkg.com/'
  },
  //map tells the System loader where to look for things
  map: {
    
    'app': './src',
    
    '@angular/core': 'npm:@angular/core/bundles/core.umd.js',
    '@angular/common': 'npm:@angular/common/bundles/common.umd.js',
    '@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js',
    '@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.js',
    '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js',
    '@angular/http': 'npm:@angular/http/bundles/http.umd.js',
    '@angular/router': 'npm:@angular/router/bundles/router.umd.js',
    '@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js',
    '@angular/animations': 'npm:@angular/animations/bundles/animations.umd.js',
    '@angular/platform-browser/animations': 'npm:@angular/platform-browser/bundles/platform-browser-animations.umd.js',
    '@angular/animations/browser': 'npm:@angular/animations/bundles/animations-browser.umd.js',
    
    '@angular/core/testing': 'npm:@angular/core/bundles/core-testing.umd.js',
    '@angular/common/testing': 'npm:@angular/common/bundles/common-testing.umd.js',
    '@angular/compiler/testing': 'npm:@angular/compiler/bundles/compiler-testing.umd.js',
    '@angular/platform-browser/testing': 'npm:@angular/platform-browser/bundles/platform-browser-testing.umd.js',
    '@angular/platform-browser-dynamic/testing': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic-testing.umd.js',
    '@angular/http/testing': 'npm:@angular/http/bundles/http-testing.umd.js',
    '@angular/router/testing': 'npm:@angular/router/bundles/router-testing.umd.js',
    
    'rxjs': 'npm:rxjs',
    'typescript': 'npm:typescript@2.2.1/lib/typescript.js'
  },
  //packages defines our app package
  packages: {
    app: {
      main: './main.ts',
      defaultExtension: 'ts'
    },
    rxjs: {
      defaultExtension: 'js'
    }
  }
});

//main entry point
import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
import {AppModule} from './app';
import 'rxjs/Rx';

platformBrowserDynamic().bootstrapModule(AppModule)

//our root app component
import {Component, Directive, NgModule, VERSION, ElementRef, Output, Input, EventEmitter, NgZone} from '@angular/core'
import {BrowserModule} from '@angular/platform-browser'
import {Observable} from 'rxjs/Observable'
import {Subject} from 'rxjs/Subject'

@Directive({
  selector: 'input[debounceInput]'
})
export class DebounceInput {
  @Output() onInput = new EventEmitter<string>();
  
  constructor(
    private _elementRef: ElementRef,
    private _zone: NgZone,
  ) {
    this._zone.runOutsideAngular(() => {
      Observable
        .fromEvent(this._elementRef.nativeElement, 'input')
        .debounceTime(1000)
        .subscribe((ev: KeyboardEvent) => {
          this._zone.run(() => this.onInput.emit(ev.target.value));
        });
    });
  }
}

@Component({
  selector: 'my-app',
  template: `
    <div>
      <h2>Hello {{name}}</h2>
      <input (input)="subject.next($event.target.value)">
      <input debounceInput (onInput)="log($event)">
    </div>
  `,
})
export class App {
  name:string;
  subject = new Subject<string>();
  constructor(zone: NgZone) {
    this.name = `Angular! v${VERSION.full}`;
    zone.onMicrotaskEmpty.subscribe(() => { console.log('detect change'); });
    this.subject.debounceTime(1000).subscribe((v) => {
      console.log(v);
    })
  }
  
  log(v) {
    console.log(v);
  }
}

@NgModule({
  imports: [ BrowserModule ],
  declarations: [ App, DebounceInput ],
  bootstrap: [ App ]
})
export class AppModule {}