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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>
- <!-- 引入文件 *顺序不能改变-->
- <!-- 将jsx转为js -->
- <script src="./babel.min.js"></script>
- <!-- react核心库 -->
- <script src="./react.development.js"></script>
- <!-- react中的dom操作库 -->
- <script src="./react-dom.development.js"></script>
- </head>
- <body>
- <div id="root"></div>
- <!-- 组件:类组件 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 hunshu() {
- return (
- <div>
- <h3>今天真的好冷</h3>
- {[1,2,3]} {/*对象*/}
- {null}
- {undefined}
- {'helloword'}
- {false}
- {true}
- {123456}
- {/**
- {{aaa:'啦啦啦啦'}} 无法渲染 报错
- */}
- </div>
- )
- }
- let element = <New/>
- ReactDOM.createRoot(document.querySelector("#root")).render(element);
- </script>
- </body>
- </html>
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