ReactJS — Extend React Class

HTML

<script src="http://fb.me/JSXTransformer-0.10.0.js"></script>
<script src="http://fb.me/react-with-addons-0.10.0.js"></script>
<script src="http://fb.me/react-js-fiddle-integration.js"></script>

JavaScript 1.7

/** @jsx React.DOM */

var Hello = React.createClass({
    render: function() {
        return <div>Hello {this.props.name}</div>;
    }
});

var Hey = React.createClass(_.extend({}, Hello.originalSpec, {
  displayName: 'Hey'
}));
 
React.renderComponent(<Hey name="World" />, document.body);