<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<!--加载React-->
<script src="https://unpkg.com/react@16/umd/react.development.js" crossorigin></script>
<script src="https://unpkg.com/react-dom@16/umd/react-dom.development.js" crossorigin></script>
<!--支持JSX语法-->
<script src="https://unpkg.com/babel-standalone@6/babel.min.js"></script>
</head>
<body>
<div id="root"></div>
<script type="text/babel">
ReactDOM.render(
<h1>Hello,world!</h1>, document.getElementById('root') );
</script>
</body>
</html>
