Angular 2 Example - QuickStart

import {Component, Directive, ElementRef, ViewChild} from 'angular2/core';

@Directive({
  selector: '[focusOnInit]'
})
export class FocusOnInit {
    
    constructor(private elementRef: ElementRef) {}
    
    ngAfterViewInit() {
        this.elementRef.nativeElement.focus();
    }
}

@Component({
	selector: 'my-app',
	template: `<h1>My First Angular 2 App</h1>
	<button (click)="appearInput()" [hidden]="isVisible">Make it visible</button>
	<input #input [hidden]="!isVisible" focusOnInit>
	<button (click)="focusInput(input)" [hidden]="!isVisible">Focus it</button>
	<button (click)="appearInput(false)" [hidden]="!isVisible">Make it invisible</button>
	`,
	directives:[FocusOnInit]
})
export class AppComponent { 
  
  private isVisible = true;

  appearInput(visible){
    this.isVisible = visible !== false;
  }
  focusInput(element: any){
    element.focus();
  }
  
}

import {bootstrap}    from 'angular2/platform/browser'
import {AppComponent} from './app.component'

bootstrap(AppComponent);

beforeEach(() => {
    jasmine.addMatchers({
        toContainText: function() {
            return {
                compare: function(actual: any, expectedText: string) {
                    var actualText = actual.textContent;
                    return {
                        pass: actualText.indexOf(expectedText) > -1,
                        get message() { return 'Expected ' + actualText + ' to contain ' + expectedText; }
                    };
                }
            };
        }
    });
});

<!DOCTYPE html>
<html>

  <head>
    <title>Angular 2 QuickStart</title>

    <!-- 1. Load libraries -->
    <script src="https://code.angularjs.org/2.0.0-beta.0/angular2-polyfills.js"></script>
    <script src="https://code.angularjs.org/tools/system.js"></script>
    <script src="https://code.angularjs.org/tools/typescript.js"></script>
    <script src="https://code.angularjs.org/2.0.0-beta.0/Rx.js"></script>
    <script src="https://code.angularjs.org/2.0.0-beta.0/angular2.dev.js"></script>

    <!-- 2. Configure SystemJS -->
    <script>
      System.config({
        transpiler: 'typescript', 
        typescriptOptions: { emitDecoratorMetadata: true }, 
        packages: {'app': {defaultExtension: 'ts'}} 
      });
      System.import('app/boot')
            .then(null, console.error.bind(console));
    </script>

  </head>

  <!-- 3. Display the application -->
  <body>
    <my-app>Loading...</my-app>
  </body>

</html>

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   [http://www.apache.org/licenses/LICENSE-2.0](http://www.apache.org/licenses/LICENSE-2.0)

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