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/babel-core/5.8.24/browser.js"></script>
<script src="http://react.zpao.com/builds/master/latest/react-with-addons.js"></script>
<script src="http://react.zpao.com/builds/master/latest/react-dom.js"></script>
<script src="https://facebook.github.io/react/js/jsfiddle-integration-babel.js"></script>

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

JavaScript 1.7

class App extends React.Component {
  constructor() {
    super();
  }
  
  onClick(event) {
    // preventDefault should stop the default action
    // of setting the checkbox's value
    event.preventDefault();
  }
  
  onChange(event) {
    window.alert("Changed to: " + event.target.checked);
  }
  
  render() {
    return (
     <input type="checkbox" onChange={this.onChange} onClick={this.onClick}/>
    )
  }
 
}

ReactDOM.render(<App/>, document.getElementById("container"))