JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://fb.me/react-js-fiddle-integration.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/react/0.4.1/react.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/react/0.4.1/JSXTransformer.js"></script>

JavaScript 1.7

/** @jsx React.DOM */

var Editor = React.createClass({
  componentDidMount: function() {
    var editor = this.refs.editor;
    editor.getDOMNode().focus();
  },
  render: function() {
    return (
      <div id='content-header'>
        <textarea ref='editor' className='expanding' placeholder='Share whats new...' style={{minHeight: 100}}>
        </textarea>
      </div>
    );
  }
});

React.renderComponent(<Editor />, document.body);