核心思路：
1. 基于数据动态渲染 tab → v-for
2. 准备下标记录高亮的是哪一个 tab → activeIndex
3. 基于下标，动态控制 class 类名
→ v-bind:class
所谓切换高亮，其实就是改下标
<style>
* {
margin: 0;
padding: 0;
}
ul {
display: flex;
border-bottom: 2px solid #e01222;
padding: 0 10px;
}
li {
width: 100px;
height: 50px;
line-height: 50px;
list-style: none;
text-align: center;
}
li a {
display: block;
text-decoration: none;
font-weight: bold;
color: #333333;
}
li a.active {
background-color: #e01222;
color: #fff;
}
</style>
</head>
<body>
<div id="app">
<ul>
<li v-for="(item, index) in list" :key="item.id" @click="activeIndex = index">
<a :class="{ active: index === activeIndex }" href="#">{{ item.name }}</a>
</li>
</ul>
</div>
<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
<script>
const app = new Vue({
el: '#app',
data: {
activeIndex: 2, // 记录高亮
list: [
{ id: 1, name: '京东秒杀' },
{ id: 2, name: '每日特价' },
{ id: 3, name: '品类秒杀' }
]
}
})
</script>
</body>
进度条效果
<style>
.progress {
height: 25px;
width: 400px;
border-radius: 15px;
background-color: #272425;
border: 3px solid #272425;
box-sizing: border-box;
margin-bottom: 30px;
}
.inner {
width: 50%;
height: 20px;
border-radius: 10px;
text-align: right;
position: relative;
background-color: #409eff;
background-size: 20px 20px;
box-sizing: border-box;
transition: all 1s;
}
.inner span {
position: absolute;
right: -20px;
bottom: -25px;
}
</style>
</head>
<body>
<div id="app">
<!-- 外层盒子底色 （黑色） -->
<div class="progress">
<!-- 内层盒子 - 进度（蓝色） -->
<div class="inner" :style="{ width: percent + '%' }">
<span>{{ percent }}%</span>
</div>
</div>
<button @click="percent = 25">设置25%</button>
<button @click="percent = 50">设置50%</button>
<button @click="percent = 75">设置75%</button>
<button @click="percent = 100">设置100%</button>
</div>
<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
<script>
const app = new Vue({
el: '#app',
data: {
percent: 30
}
})
</script>
