title: Is it possible to use ES5 JavaScript with Angular 2 instead of TypeScript?
body: <p>Is it needed to learn TypeScript for Angular 2?</p>
  
  <p>Can Angular 2 be used with plain JavaScript ?</p>
  
  <p>Edit: I've seen that the languages used as ES6, ES7, Dart compile to JavaScript to be executed, but I haven't seen any reference to use ES5 JavaScript directly.</p>