React cdn読み込みサンプル2

<script src="https://unpkg.com/react@16.0.0/umd/react.production.min.js"></script>
<script src="https://unpkg.com/react-dom@16.0.0/umd/react-dom.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-core/5.8.38/browser.js"></script>


<script src="https://unpkg.com/react@15/dist/react.js"></script>
<script src="https://unpkg.com/react-dom@15/dist/react-dom.js"></script>

<div id="root"></div>

<script type="text/babel">
ReactDOM.render(
  <h1>Hello, world!</h1>,
  document.getElementById('root')
);
</script>