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({
  render: function() {
  	let svg = [0, 1, 2, 3].map((i) => {
    	return `<rect x="${i * 30}" y="0" width="30" height="120" fill="rgb(0, 0, ${i * 80})"></rect>`
    }).join('')
    return (
    	<div>
        <svg width="120" height="120" viewBox="0 0 120 120" dangerouslySetInnerHTML={{__html: svg}} />
      </div>
    );
  }
});

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