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							- <!DOCTYPE html>
 
- <html lang="en">
 
- <head>
 
-     <meta charset="UTF-8">
 
-     <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
-     <title>Document</title>
 
-     <!-- jsx 语法浏览器不识别 jsx => js 浏览器可识别的语言 -->
 
-     <script src="./babel.min.js"></script>
 
-     <!-- react的核心库 -->
 
-     <script src="./react.development.js"></script>
 
-     <!-- 解析react中的dom库 -->
 
-     <script src="./react-dom.development.js"></script>
 
- </head>
 
- <body>
 
-     <div id="root">
 
-         <!-- <h1>哈哈哈哈</h1> -->
 
-     </div>
 
-     <script type="text/babel">
 
-         // type 类型
 
-         // 告知浏览器 识别类型是babel转译后的文本内容
 
-         // jsx语法
 
-         let first = <h1>你好</h1>;
 
-         // 创建root实例
 
-         let root = ReactDOM.createRoot(document.getElementById("root"));
 
-         // 渲染页面
 
-         root.render(first)        
 
-     </script>
 
- </body>
 
- </html>
 
 
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