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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>
- <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>
- <!--
- 数据绑定:{} 表达式
- 不能渲染的类型:
- boolean undefined null
- 不能使用 if/while/for
- 可以使用:
- 数学表达式
- 三元表达式
- 方法的调用
- 数组的操作
- -->
- <script type="text/babel">
- const userName = 'tutu';
- const age = 3;
- const arr = [1, 23, 4]
- const obj = {
- a: 1
- }
- function aa() { return 1 };
- // const element = <h1>我叫{'123'}</h1>;
- // const element = <h1>{
- // age > 3 ? '大孩子' : '小孩子'
- // }</h1>
- const element = <h1>{
- [...arr].reverse().join('')
- }</h1>
- // const element = <h1>{aa()}</h1>
- // const element = <h1>{12}</h1>
- // const element = <h1>我叫{userName},今年{age + 10}岁</h1>
- const container = document.getElementById("root");
- const root = ReactDOM.createRoot(container)
- root.render(element);
- </script>
- </body>
- </html>
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