JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/handlebars.js/2.0.0/handlebars.min.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/ember.js/1.9.0/ember.min.js"></script>
<div id="main"></div>

<script type="text/x-handlebars" data-template-name="index">
    {{logIt test}}
    <h1>{{test}}</h1>
</script>

JavaScript

App = Ember.Application.create({
    rootElement: '#main'
});

App.IndexRoute = Ember.Route.extend({
    setupController: function(controller){
        controller.set('test', 'mytest');
    }
});

Ember.Handlebars.registerHelper("logIt", function(something) {
    console.log(something);
});