SOURCE

const {
  Select
} = antd

class Index extends React.Component {
  constructor() {
    super();
  };
  render() {
    return ( < TodoBox / >);
  }
}

class TodoBox extends React.Component {
  render() {
    return < section > hello < /section>
  }     
}      
      
      
      
ReactDOM.render(<Index/ > ,
    document.getElementById("app"))

<script src='https://unpkg.com/react/umd/react.production.min.js'>
</script>
<script src='https://unpkg.com/react-dom/umd/react-dom.production.min.js'>
</script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/antd/3.0.0-alpha.9/antd.js'>
</script>
<div id='app'>
</div>