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class App extends React.Component {
  render() {
    return (<p>4564564556</p>)
  }
}

  
ReactDOM.render(<App/ > ,
    document.getElementById("root"))

<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 = "root"></div>