Angular 2 beta - properties

<!DOCTYPE html>
<html>

  <head>
    <title>angular2 playground</title>
    <link rel="stylesheet" href="style.css" />
    <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="config.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.min.js"></script>
    <script src="https://code.angularjs.org/2.0.0-beta.0/http.min.js"></script>
    <script>
    System.import('app')
      .catch(console.error.bind(console));
  </script>
  </head>

  <body>
    <my-component>
      loading...
    </my-component>
    
    <p style="margin-top: 50px;">Note: For the sake of the plunker, the log is now an alert.</p>
  </body>

</html>

/* Styles go here */

### Angular2 Starter Plunker - Typescript - Beta 0

A simple plunker demonstrating Angular2 usage:
- Uses SystemJS + TypeScript to compile on the fly
- Includes binding, directives, http, pipes, and DI usage.

System.config({
  //use typescript for compilation
  transpiler: 'typescript',
  //typescript compiler options
  typescriptOptions: {
    emitDecoratorMetadata: true
  },
  //map tells the System loader where to look for things
  map: {
    app: "./src"
  },
  //packages defines our app package
  packages: {
    app: {
      main: './main.ts',
      defaultExtension: 'ts'
    }
  }
});

import {bootstrap} from 'angular2/platform/browser';
import {MyComponent} from './mycomponent';

bootstrap(MyComponent);

import {Component} from 'angular2/core';

import {Tooltip} from './tooltip';

@Component({
  selector: 'my-component',
  template: `<div [tooltip]="message">A tooltip with custom message</div>`,
  directives: [Tooltip]
})
export class MyComponent {
  message: string;
  
  constructor() {
    this.message = 'tooltip text';
  }
}

import {Directive, Input} from 'angular2/core';

@Directive({
  selector: '[tooltip]',
  host: {
    '(mouseover)': 'show()'
  }
})
export class Tooltip {
  @Input('tooltip') text: string;
  
  show() {
    alert(this.text);
  }
}