Add this url to codepen or wherever

//rawgit.com/gilbox/my-component-playground/master/dist/bundle.js

Also some javascript:

<script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/codemirror/5.0.0/codemirror.min.js"></script>
<script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/codemirror/5.0.0/mode/javascript/javascript.min.js"></script>

And CSS:

<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/codemirror/5.0.0/codemirror.min.css"/>
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/codemirror/5.0.0/theme/monokai.min.css"/>