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="https://npmcdn.com/react@latest/dist/react-with-addons.js"></script>
<script src="https://npmcdn.com/react-dom@latest/dist/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

var Hello = React.createClass({

getInitialState : function(){
return {clicked:true}
},
handleClick :function(){
console.log(this.state.clicked);
	this.setState({clicked:!this.state.clicked})
},
  render: function() {
    return (<div>
    <button onClick={this.handleClick}>Click</button>
    {this.state.clicked && <div>Shown or hidden?</div>}
    </div>);
  }
});

ReactDOM.render(
  <Hello name="World" />,
  document.getElementById('container')
);