Is it possible to use ES5 JavaScript with Angular 2 instead of TypeScript?

Question

Is it needed to learn TypeScript for Angular 2?

Can Angular 2 be used with plain JavaScript ?

Edit: I\'ve seen that the languages used as ES6, ES7, Dart comp

Answer 1

A simple way to write plain javascript es5 components:

(function() {

    var MyComponent = ng.
        Component({
            selector: 'my-component'
        })
        .View({
            templateUrl: 'my-component.html'
        })
        .Class({
            constructor: function () {
                this.someArray = [];
            },
            someCustomFunction: function(item) {
                this.someArray.push(item);
                ...
            }
        })

    document.addEventListener('DOMContentLoaded', function() {
        ng.bootstrap(MyComponent);
    });

})();

Here is a simple todo list demo using Javascript es5.