lovecoding
/
VIP26


			
				
					
						
						
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<head>
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    <title>Document</title>
    <script src="./babel.min.js"></script>
    <script src="./react.development.js"></script>
    <script src="./react-dom.development.js"></script>
</head>
<body>
    <div id="root"></div>
    <!-- 
        组件：类组件 函数组件
        函数组件
     -->
    <script type="text/babel">
        // 这是一个函数组件  首写字母要大写
        // null undefined boolean Object无法渲染
        function New() {
          return (
            <div>
                <h3>一会考你俩面试题</h3>
                {[1,2,3,4,5]}
                {null}
                {undefined}
                {'helloWorld'}
                {false}
                {true}
                {13456}
                {/**
                    {{aaa:"哈哈哈"}} 无法渲染 报错
                */}
            </div>
          )
        }
        let element = <New/>
        ReactDOM.createRoot(document.querySelector("#root")).render(element);
    </script>
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