basic/5.2条件渲染指令v-if.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <template v-if="type === 'name'">
            <label>用户名：</label>
            <input placeholder="输入用户名" key="name-input">
            <!-- key属性让你自己决定是否要复用元素，key的值必须是唯一的 -->
        </template>
        <template v-else>
            <label>邮箱：</label>
            <input placeholder="输入邮箱" key="mail-input">
        </template>
        <button @click="handleToggleClick">切换输入类型</button>
    </div>
    <script src="https://unpkg.com/vue/dist/vue.min.js"></script>
    <script>
        var app=new Vue({
            el: '#app',
            data: {
                type: 'name'
            },
            methods: {
                handleToggleClick: function(){
                    this.type = this.type==='name'?'mail':'name';
                }
            }
        })
    </script>
</body>
</html>