Angular2 + Typescript Demo Plunk

<!DOCTYPE html>
<html>

  <head>
    <base href="." />
    <title>angular2 playground</title>
    <link rel="stylesheet" href="style.css" />
    <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">    
    <script
  src="https://code.jquery.com/jquery-3.1.1.min.js"
  integrity="sha256-hVVnYaiADRTO2PzUGmuLJr8BLUSjGIZsDYGmIJLv2b8="
  crossorigin="anonymous"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></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'
import {FormsModule, ReactiveFormsModule} from '@angular/forms';
import { DataDrivenComponent } from "./data-driven.component";

@Component({
  selector: 'my-app',
  template: `
    <div class="container">
      <div class="row">
        <div class="col-md-6 col-md-offset-3">
          <h1>Forms (Data Driven)</h1>
          <data-driven></data-driven>
          <hr>
        </div>
      </div>
    </div>
  `,
})
export class App {
  name:string;
  constructor() {
    this.name = 'Angular2'
  }
}

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

import { Component } from '@angular/core';
import {FormGroup, FormControl, Validators, FormArray, FormBuilder} from "@angular/forms";
import {Observable} from "rxjs";

@Component({
    selector: 'data-driven',
    templateUrl: './src/data-driven.component.html',
   
    styles: [`
        .glyphicon-refresh-animate {
            -animation: spin .7s infinite linear;
            -webkit-animation: spin2 .7s infinite linear;
        }
        
        @-webkit-keyframes spin2 {
            from { -webkit-transform: rotate(0deg);}
            to { -webkit-transform: rotate(360deg);}
        }
        
        @keyframes spin {
            from { transform: scale(1) rotate(0deg);}
            to { transform: scale(1) rotate(360deg);}
        }
    `]
})
export class DataDrivenComponent {
    myForm: FormGroup;

    public loading: boolean = false;

    constructor(private formbuilder: FormBuilder) {

        this.myForm = formbuilder.group({
          'hobbies': formbuilder.array([
            ['Cooking', this.asyncExampleValidator.bind(this)]
          ])
        });
    }

  
    onAddHobby() {
      (<FormArray>this.myForm.get('hobbies')).push(new FormControl('', Validators.required, this.asyncExampleValidator.bind(this)));
    }

    /**
     * @param control
     * @return {Promise<any>}
     */
    asyncExampleValidator(control: FormControl): Promise<any> | Observable<any> {
        var that = this;
        //console.log(this);
        const promise = new Promise<any>(
          (resolve, reject) => {
            that.loading = true;
            setTimeout(() => {
              that.loading = false;
              if (control.value === '') {
                console.log('Invalid');
                resolve({'invalid': true});
              }
              else {
                console.log('Valid');
                resolve(null);
              }
            }, 1500);
          }
        );
        return promise;
    }
}

<h1>Data Driven</h1>
<form [formGroup]="myForm" (ngSubmit)="onSubmit()">
    
    <div formArrayName="hobbies">
        <h3>Hobbies</h3>
        <!-- Por cada control del array de controles creado en el código, añadimos su correspondiente html -->
        <div class="form-group" *ngFor="let hobby of myForm.get('hobbies').controls; let i = index">
          <!-- Notar que se usa string interpolation {{i}} porque la directiva formControName no usa data binding -->
          <input type="text"
                   class="form-control" formControlName="{{i}}">
        </div>
    </div>
    <button type="button" class="btn btn-default" (click)="onAddHobby()">Add Hobby</button>
    <!-- Fijarse en como lo hacemos en Template Driven Approach: añadimos variable local
    #formulario="ngForm" en la etiqueta <form>, y accedemos al valor de la propiedad disabled
    del botón mediante [disabled]="!formulario.valid" -->
    <button type="submit" class="btn btn-primary" [disabled]="!myForm.valid">Submit<i *ngIf="loading" class="glyphicon glyphicon-refresh glyphicon-refresh-animate"></i></button>
</form>