JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://fb.me/JSXTransformer-0.8.0.js"></script>
<script src="http://react.zpao.com/builds/master/latest/react-with-addons.js"></script>
<script src="http://fb.me/react-js-fiddle-integration.js"></script>

JavaScript 1.7

/** @jsx React.DOM */

var Hello = React.createClass({
    componentWillMount: function() {
        throw new Error("componentDidMount should not be run for server render");
    },
    render: function() {
        return this.props.children();
    }
});

var s = React.renderComponentToString(
    Hello(null, function() { return React.DOM.div(null, "Hello"); })
);
console.log(s);