jsx初级.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <div id="root">

    </div>
    <script src="./lib/react.development.js"></script>
    <script src="./lib/react-dom.development.js"></script>
    <script src="./lib/babel.min.js"></script>
    <script type="text/babel">
        /***
         * react 初级 ：
         * 1.react元素
         * 2.react class style 事件 变量的应用
         * class 要写成 className
         * style 是个json 也可以...扩展操作符
         * 事件要驼峰
         * 变量要加{}号
         * 单标记要加/闭合
         * **/
        function fn(user) {
            if(user){
                return <h3>欢迎{user.name}登录</h3>
            }else{
                return <h3>点击登录</h3>
            }
        }
        let s = (<div>
                <h3>react</h3>
                <p>第一节</p>
                <div>{fn({name:"小明"})}</div>
            </div>);
        ReactDOM.render(s,document.getElementById("root"));
    </script>
</body>
</html>