vue-demo/6.条件渲染.html

<!DOCTYPE html>
<html>

<head>
    <title>6.条件渲染</title>
    <meta charset="utf-8">
    <style>
    .title {
        font-size: 25px;
        font-weight: bold;
    }
    </style>
    <script src="./vue.js"></script>
    <script>
    window.onload = function() {
        var app = new Vue({
            el: '#app',
            data: {
                ok: true,
                type: 'a',
                loginType: 'username'
            },
            methods: {
                toggleType: function() {
                    if (this.loginType == 'username')
                        this.loginType = 'email'
                    else
                        this.loginType = 'username'
                }
            }
        })
    }
    </script>
</head>

<body>
    <div id="app">
        <p class="title">v-if</p>
        <h1 v-if="ok">Yes</h1>
        <h1 v-else>No</h1>
        <p class="title">template 中 v-if 条件组</p>
        <template v-if="ok">
            <h4>Title</h4>
            <p>Paragraph 1</p>
            <p>Paragraph 2</p>
        </template>
        <p class="title">v-else</p>
        <p>复用随机数来选择显示/隐藏</p>
        <div v-if="Math.random() > 0.5">
            Now you see me
        </div>
        <div v-else>
            Now you don't
        </div>
        <p>v-else-if</p>
        <div v-if="type==='A'">
            A
        </div>
        <div v-else-if="type==='B'">
            B
        </div>
        <div v-else-if="type==='C'">
            C
        </div>
        <div v-else>
            NOT A/B/C
        </div>
        <p>用key管理可复用的元素</p>
        <template v-if="loginType === 'username'">
            <label>Username</label>
            <input placeholder="Enter your username">
        </template>
        <template v-else="loginType === 'email'">
            <label>Email</label>
            <input placeholder="Enter your email">
        </template>
        <p>
            <input type="button" name="Toggle login type" value="Toggle login type" @click="toggleType">
        </p>
		
		<p>增加了key 之后的 template,每次切换时，输入框都将被重新渲染</p>
		<template v-if="loginType === 'username'">
            <label>Username</label>
            <input placeholder="Enter your username" key="username-input">
        </template>
        <template v-else="loginType === 'email'">
            <label>Email</label>
            <input placeholder="Enter your email" key="email-input">
        </template>
        <p>
            <input type="button" name="Toggle login type" value="Toggle login type" @click="toggleType">
        </p>

    </div>
</body>

</html>