React Base Fiddle (JSX)

Starting point for creating JSFiddles with React. This uses React with Addons.

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.13.1/JSXTransformer.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.13.1/react-with-addons.js"></script>
<script src="https://facebook.github.io/react/js/jsfiddle-integration.js"></script>

<div id="container">
    <!-- This element's contents will be replaced with your component. -->
</div>

CSS

.rectangle 
{
    height: 100px;
    width: 100px;
    position: absolute;
}

JavaScript 1.7

var Rectangle = React.createClass({
   
    render: function() {

        return <div>
            <div>{this.props.intValue + 10}</div>
            <div>{this.props.stringValue + 10}</div>
        </div>;
    }
});
 
React.render(<Rectangle intValue="10" stringValue="Hello" />
    , document.getElementById('container'));