Angular 2 Example - Attribute Directive

import {bootstrap, Component} from 'angular2/angular2';
import {Highlight} from './highlight.directive'

@Component({
  selector: 'my-app',
  template: `
  <h1>My First Attribute Directive</h1>
  <h4>Pick a highlight color</h4>
  <div>
    <input type="radio" name="colors" (click)="color='lightgreen'">Green
    <input type="radio" name="colors" (click)="color='yellow'">Yellow
    <input type="radio" name="colors" (click)="color='cyan'">Cyan
  </div>
  <p><span [highlight]='color'>Highlight me!</span></p>
  
  `,
  directives: [Highlight]
})

class AppComponent { }

bootstrap(AppComponent);

import {Directive, ElementRef, Renderer, Input} from 'angular2/angular2';

@Directive({
  selector: '[highlight]',
  host: {
    '(mouseenter)': 'onMouseEnter()',
    '(mouseleave)': 'onMouseLeave()'
  }
})

export class Highlight {
  @Input() highlight: string;
  private _defaultColor = 'red';
  constructor(private el: ElementRef, private renderer: Renderer) { }

  onMouseEnter() { this._highlight(this.highlight || this._defaultColor); }
  onMouseLeave() { this._highlight(null); }

  private _highlight(color:string) {
    this.renderer.setElementStyle(this.el, 'background-color', color);
  }

}

<!DOCTYPE html>
<html>

<head>
  <title>Attribute Directives</title>
  <script src="https://rawgithub.com/systemjs/systemjs/0.19.6/dist/system.js"></script>
  <script src="https://code.angularjs.org/tools/typescript.js"></script>
  
  <!-- NO COLOR NAMES   -->
  <script src="https://code.angularjs.org/2.0.0-alpha.46/angular2.dev.js"></script>

  <!-- COLOR NAMES SHOW  
  <script src="https://code.angularjs.org/2.0.0-alpha.47/angular2.dev.js"></script>
  -->
  <script>
      System.config({
        transpiler: 'typescript', 
        typescriptOptions: { emitDecoratorMetadata: true }, 
        packages: {'app': {defaultExtension: 'ts'}} 
      });
  System.import('app/app');
  </script>
</head>

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

</html>

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you may not use this file except in compliance with the License.
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   [http://www.apache.org/licenses/LICENSE-2.0](http://www.apache.org/licenses/LICENSE-2.0)

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