index.html
<!DOCTYPE html>
<html>
<head>
<title>Hello World</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/2.0.0-alpha.34/angular2.sfx.dev.js"></script>
<script src="app.js"></script>
</head>
<body>
<my-app>Loading...</my-app>
</body>
</html>
