react template

HTML

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

JavaScript 1.7

/**
* @jsx React.DOM
*/

var Hello = React.createClass({
  render: function() {
    return (<span>Hi there</span>);
  }
});

var startRendering = function(){
    alert('before react');
    React.renderComponent(<Hello/>, document.body);
} 

startRendering();