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

#one {
  color: red;
},

JavaScript 1.7

var RadioGroup = React.createClass({
    getInitialState: function(){
        return {
            checked: 'one'
        };
},
 onChange: function(id){
   this.setState({checked: id});
   alert('change to: ' + id);
},
    render: function() {
        return  <div>
             <label>
                <input type='radio' name='radioGroup' id='one' checked={this.state.checked === 'one'} onChange={this.onChange.bind(this, 'one')}/>
                <span>one</span>
              </label>
              <label>
                <input type='radio' name='radioGroup' id='two' checked={this.state.checked === 'two'} onChange={this.onChange.bind(this, 'two')} />
                <span>two</span>
              </label>
            </div>;
    }
});
 
React.render(<RadioGroup />, document.getElementById('container'));