方式一：jsx语法
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>1_使用jsx创建虚拟DOM</title>
</head>
<body>
<!-- 准备好一个“容器” -->
<div id="test"></div>
<!-- 引入react核心库 -->
<script type="text/javascript" src="../js/react.development.js"></script>
<!-- 引入react-dom，用于支持react操作DOM -->
<script type="text/javascript" src="../js/react-dom.development.js"></script>
<!-- 引入babel，用于将jsx转为js -->
<script type="text/javascript" src="../js/babel.min.js"></script>
<script type="text/babel" > /* 此处一定要写babel */
//1.创建虚拟DOM
const VDOM = ( /* 此处一定不要写引号，因为不是字符串 */
<h1 id="title">
<span>Hello,React</span>
</h1>
)
//2.渲染虚拟DOM到页面
ReactDOM.render(VDOM,document.getElementById('test'))
</script>
</body>
</html>
方式二：使用js创建
1.接口：React.createElement(id,attribute,parentNode)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>2_使用js创建虚拟DOM</title>
</head>
<body>
<!-- 准备好一个“容器” -->
<div id="test"></div>
<!-- 引入react核心库 -->
<script type="text/javascript" src="../js/react.development.js"></script>
<!-- 引入react-dom，用于支持react操作DOM -->
<script type="text/javascript" src="../js/react-dom.development.js"></script>
<script type="text/javascript" >
//1.创建虚拟DOM
const VDOM = React.createElement('h1',{id:'title'},React.createElement('span',{},'Hello,React'))
//2.渲染虚拟DOM到页面
ReactDOM.render(VDOM,document.getElementById('test'))
</script>
</body>
</html>
