React-虚拟DOM的创建

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  • 方式一 js创建
<!DOCTYPE html>
<html lang="zh">
    <head>
        <meta charset="UTF-8">
        <title>hello_react</title>
    </head>
    <body>
        <div id="test"></div>
        <script type="text/javascript" src="js/react.development.js"></script>
        <script type="text/javascript" src="js/react-dom.development.js"></script>
        <script type="text/javascript">
            //React.createElement(标签名,标签属性,标签内容)
            const VDOM=React.createElement('h1',{id:'title'},React.createElement('span',{},'Hello react'))
            ReactDOM.render(VDOM,document.getElementById('test'))
        </script>
    </body>
</html>
  • 方式二 jsx创建
<!DOCTYPE html>
<html lang="zh">
    <head>
        <meta charset="UTF-8">
        <title>hello_react</title>
    </head>
    <body>
        <div id="test"></div>
        <script type="text/javascript" src="js/react.development.js"></script>
        <script type="text/javascript" src="js/react-dom.development.js"></script>
        <script type="text/javascript">
            const VDOM=(<h1><span>hello react</span></h1>)
            ReactDOM.render(VDOM,document.getElementById('test'))
        </script>
    </body>
</html>