JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://fb.me/react-with-addons-0.12.0.js"></script>
<script src="http://fb.me/JSXTransformer-0.12.0.js"></script>
<script src="http://fb.me/react-js-fiddle-integration.js"></script>

 <div id="world">World</div>

JavaScript 1.7

var Hello = React.createClass({

componentDidMount: function() {
      var root = this.getDOMNode();
      var text = document.createTextNode(" world");
      root.appendChild(text);
    },
    
    render: function() {
        return <div>hello</div>;
    }
});
 
React.render(<Hello />, document.body)