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Angular 2 System is not defined.

Angular 2 System is not defined.

You can Try to include the System JS file in your HTML header file and resolve this error.

Include SystemJS Script.

<script src="[email protected]"></script>

The Example for detail as given below.

index.html file

<!DOCTYPE html>

    <link rel="stylesheet" href="style.css" />
    <script src="[email protected]"></script>
    <script src=""></script>
        paths: {




main.js file

import {Component, View, bootstrap} from 'angular2/angular2';

  selector: 'app',
  bindings: [Service]
  template: '{{greeting}} I am Anil!'
class App {
  constructor(service: Service) {
    this.greeting = service.greeting();
    setTimeout(() => this.greeting = 'Hi,', 2000);

class Service {
  greeting() {
    return 'Welcome you!';


The live demo example


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