| 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556 | <!DOCTYPE html><html lang="en">    <head>        <title></title>        <meta charset="UTF-8">        <meta name="viewport" content="width=device-width, initial-scale=1">        <!-- 将jsx转为js -->        <script src="./babel.min.js"></script>        <!-- react核心库 -->        <script src="./react.development.js"></script>        <!-- react中dom操作库 -->        <script src="./react-dom.development.js"></script>        <style>            /* .box {                width: 500px;                height: 500px;                border: 1px solid #000;                margin: 0 auto;            } */        </style>    </head>    <body>        <div id="root"></div>        <script type="text/babel">            let newBox = {                width: '500px',                height: '500px',                border: '1px solid #f00',                margin: '0 auto',                display: 'flex',                justifyContent: 'space-between',                alignItem: 'center'            }            let left = {                width: '200px',                height: '200px',                backgroundColor: 'purple',                color: "#fff"            }            let box = (                <div style={newBox}>                    <div style={left}>左侧盒子</div>                    <div style={{                        width:'200px',                        height:'200px',                        backgroundColor:'#ff0',                        color:'#f00'                    }}>右侧盒子</div>                </div>            )            let showPage = document.querySelector("#root");            ReactDOM.createRoot(showPage).render(box);        </script>    </body></html>
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