ng2: Change detection strategy playground

<!DOCTYPE html>
<html>

  <head>
    <base href="." />
    <title>angular2 playground</title>
    <link rel="stylesheet" href="style.css" />
    <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>
    <app>
    loading...
  </app>
  </body>

</html>

/* Styles go here */


.controls{
  margin-bottom: 2rem;
  border: 1px solid lightgrey;
  padding: 1rem;
}

.values {
  
  border: 1px solid lightgrey;
  padding: 1rem;
  margin-top: 1rem;
}


normal {
  display: block;
  margin: 1rem 0 1rem 0;
  border: 1px solid lightgrey;
  padding: 1rem;
}


onpush {
  display: block;
  margin: 1rem 0 1rem 0;
  border: 1px solid lightgrey;
  padding: 1rem;
}

### ng2 Change detection strategy playground

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/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@2.0.2/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';

platformBrowserDynamic().bootstrapModule(AppModule)

//our root app component
import {Component, NgModule} from '@angular/core'
import {BrowserModule} from '@angular/platform-browser'
import { FormsModule } from '@angular/forms';

import {OnPush} from './onpush'
import {Normal} from './normal'

@Component({
  selector: 'app',
  template: `
    <div class='controls'>
      <h4> Parent </h4>
      <div>
      <label >Firstname</label> <input #firstname/>
      </div>
      <div>
      <label >Lastname</label> <input #lastname/>
      </div>
      <button type='button' (click)='changeObj( firstname.value, lastname.value )'>Change obj</button>
      <button type='button' (click)='changeContent(firstname.value, lastname.value)'>Change content</button>
      <button type='button' (click)='dummyAction()'>Dummy action</button>
      
      <div class='values'>
       Value: {{value | json}}
      </div>
      
      <onpush [value]='value'> </onpush>
      <normal [value]='value'> </normal>
    </div>
  `,
})
export class App {
  
  value: any = { firstname: 'bob', lastname:'macfly' };
  
  constructor() {
    
  }
  
  changeObj( firstname, lastname ) {
    this.value = { firstname: firstname, lastname:lastname};
  }
  
  changeContent(  firstname, lastname  ) {
    this.value.firstname = firstname;
    this.value.lastname = lastname;
  }  
  
  dummyAction() {
  }
  
  
}

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

//our root app component
import {Component, NgModule, Input, ChangeDetectionStrategy, ChangeDetectorRef} from '@angular/core'

@Component({
  selector: 'onpush',
  template: `
  <h4> Child - On Push </h4>
  <div>
  <button type=button (click)='mark()'> markForCheck() </button>
  <button type=button (click)='detect()'> detectChanges() </button>
  <button type=button (click)='detach()'> detach() </button>
  <button type=button (click)='reattach()'> reattach() </button>
  </div>
  <div>
      <label >Internal value</label> <input #internal/><button type=button (click)='changeInternal(internal.value)'> Change internal </button>
  </div>
  
  <div class='values'>
   <div>
      Value: {{value | json}}
   </div>
   <div>
      Internal Value: {{internalValue | json}}
   </div>  
  </div>
  `,
  changeDetection: ChangeDetectionStrategy.OnPush
})
export class OnPush {
  @Input() value:string;
  internalValue: string = 'test';
  
  constructor( private changeDetectorRef: ChangeDetectorRef ) {
  }
  
  mark() {
    console.log( 'OnPush - markForCheck()' );
    this.changeDetectorRef.markForCheck();
  }
  
  detect() {
    console.log( 'OnPush - detectChanges()' );
    this.changeDetectorRef.detectChanges();
  }
  detach() {
    console.log( 'OnPush - detach()' );
    this.changeDetectorRef.detach();
  }
  
  reattach() {
    console.log( 'OnPush - reattach()' );
    this.changeDetectorRef.reattach();
  }
  
  ngDoCheck() {
    console.log( 'OnPush - DoCheck');
  }
  
  changeInternal( v ) {
    this.internalValue = v;
  }
}

import {Component, NgModule, Input, ChangeDetectionStrategy, ChangeDetectorRef} from '@angular/core'

@Component({
  selector: 'normal',
  template: `
  <h4> Child - Normal</h4>
  <div>
  <button type=button (click)='mark()'> markForCheck() </button>
  <button type=button (click)='detect()'> detectChanges() </button>
  <button type=button (click)='detach()'> detach() </button>
  <button type=button (click)='reattach()'> reattach() </button>
  </div>
    <div>
      <label >Internal value</label> <input #internal/><button type=button (click)='changeInternal(internal.value)'> Change internal </button>
  </div>
  
  <div class='values'>
   <div>
      Value: {{value | json}}
   </div>
   <div>
      Internal Value: {{internalValue | json}}
   </div>  
  </div>
  `
})
export class Normal {
  
  @Input() value:string;
  internalValue: string = 'test';
  
  constructor( private changeDetectorRef: ChangeDetectorRef ) {
  }
  
 
  mark() {
    console.log( 'OnPush - markForCheck()' );
    this.changeDetectorRef.markForCheck();
  }
  
  detect() {
    console.log( 'OnPush - detectChanges()' );
    this.changeDetectorRef.detectChanges();
  }
  
  detach() {
    console.log( 'Normal - detach()' );
    this.changeDetectorRef.detach();
  }
  
  reattach() {
    console.log( 'Normal - reattach()' );
    this.changeDetectorRef.reattach();
  }
  
    
  ngDoCheck() {
    console.log( 'Normal - DoCheck');
  }
    
  changeInternal( v ) {
    this.internalValue = v;
  }
}