Angular2 + Typescript Demo Plunk

<!DOCTYPE html>
<html>

  <head>
    <base href="." />
    <title>angular2 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/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'


export class Question {
	id: number;
	title: string;
	answer: string;
	useranswer: string; // the answer the user gives
}

const QUESTIONS: Question[] = [
  {id:1, title: 'Is it good?', answer: 'yes', useranswer: ''},
  {id:2, title: 'Is is good still?', answer: 'no', useranswer: ""}
  ];

export class Quiz {
    wasEvaluated: boolean;
    questions: Question[]; // get the list of questions from statis data, or service/db, etc.

    evaluate(){
        this.wasEvaluated = true;
    }

    constructor() {
        this.wasEvaluated = false;
        this.questions = QUESTIONS;
     }
}

@Component({
  selector: 'my-app',
  template: `
<form name="question-list-form" id="question-list-form">
<ol class="question-list" id="question-list">
        <li class="left" *ngFor="let question of quiz.questions; let firstQuestion=first; let lastQuestion=last;">
        {{question.title}}
        <div><textarea [autofocus]="firstQuestion"></textarea></div>
        <div style="background-color: lightgreen;" [hidden]="!quiz.wasEvaluated">{{question.answer}}</div>
        </li>
</ol>
<button (click)="quiz.evaluate();" [hidden]="quiz.wasEvaluated" type="button">Check answers</button>
<button (click)="doAnother();" [hidden]="!quiz.wasEvaluated" type="button">Do another!</button>
</form><!-- END question-list-form -->
`,
})
export class App {
  quiz: Quiz;

  constructor(){
    this.quiz = new Quiz();
  }
  
  doAnother() {
    this.quiz = new Quiz();
  }
  
  constructor() {
    this.isAnswered = false;
  }
}

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