React Base Fiddle (JSX)
Starting point for creating JSFiddles with React. This uses React with Addons.
by Cody Lindley
HTML
<script src="https://fb.me/react-with-addons-0.14.0.js"></script>
<script src="https://fb.me/react-dom-0.14.0.js"></script>
<div id="app1"></div>
Babel + JSX
var label = '2 + 2';
var inputType = 'input';
//Note how I use JavaScript expressions/values via {} intermingled among JSX
var reactNode = <label>{label} = <input type={inputType} value={2+2} /></label>;
ReactDOM.render(reactNode, document.getElementById('app1'));