title: ReactDom is undefined
body: <p>I am using React with Webpack and Babel. I am getting a runtime error:</p>
  
  <blockquote>
    <p>Uncaught ReferenceError: ReactDom is not defined</p>
  </blockquote>
  
  <p>My react version is:</p>
  
  <pre><code>"devDependencies": {
     "phantomjs-polyfill": "0.0.2",
     "react-addons-test-utils": "^0.14.8"
   },    
   "dependencies": {
     "react": "^0.14.7",
     "react-dom": "^0.14.7"
   },
  </code></pre>
  
  <p>and my code is:</p>
  
  <pre><code>import React from 'react';
  import ReactDOM from 'react-dom';
  import Main from './components/main';
  
  ReactDom.render(&lt;Main /&gt;, document.getElementById('root'));
  </code></pre>
  
  <p>What am I doing wrong?</p>