Angular2 Final Release - "Error: Angular requires Zone.js prolyfill"

You need to include Zone as a script tag before you include angular, it doesn't get loaded as a module. See https://angular.io/guide/quickstart

<!-- 1. Load libraries -->

<script src="node_modules/core-js/client/shim.min.js"></script>
<script src="node_modules/zone.js/dist/zone.js"></script>
<script src="node_modules/reflect-metadata/Reflect.js"></script>
<script src="node_modules/systemjs/dist/system.src.js"></script>

If adding node_module to your HTML is a problem, all you need is to manually import zone.js before bootstrapping.

import 'zone.js';
...
platformBrowserDynamic().bootstrapModule(AppModule);

This can happen if the order of scripts is incorrect.

<!-- ERROR: Angular requires Zone.js polyfill -->
<script src="main.js"></script>
<script src="runtime.js"></script>
<script src="polyfills.js"></script>

Correct order:

<!-- Success -->
<script src="runtime.js"></script>
<script src="polyfills.js"></script>
<script src="main.js"></script>

Add import 'zone.js' on top of the file main.ts.

I was trying to include serviceWorkers.