JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://cloud.github.com/downloads/emberjs/ember.js/ember-latest.min.js"></script>
<script type='text/x-handlebars' data-template-name='item'><span>{{name}}</span></script>

<div id="main"></div>

JavaScript

App = Ember.Application.create({});

App.Item = Ember.View.extend({
    templateName: "item",
    didInsertElement: function(){
      this._super();
      this.$("span").after(this.$("span").offset().top)
    }
});

var item = App.Item.create({name: "Awesome thing"})
item.appendTo("#main");

var item = App.Item.create({name: "Second thing"})
item.appendTo("#main");