Vue中tab栏切换的简单实现

<style>
        a{
            text-decoration: none;
            width: 180px;
            height: 30px;
            line-height: 30px;
            text-align: center;
            color: #666;
            float: left;
            margin-right: 15px;
        }
        .nav::after{
            content: '';
            display: block;
            clear: both;
        }
        .nav a{
            background-color: beige;
        }
        .nav a.hover{
            background-color: blue;
        }
        .nav_con div{
            display: none;
        }
        .nav_con .center{
            display: block;
        }
          img{
            width: 570px;
        }
</style>

<div class="tab">
        <div class="nav">
            <a href="javascript:;" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="hover">图片一</a>
            <a href="javascript:;" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >图片二</a>
            <a href="javascript:;" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >图片三</a>
        </div>
        <div class="nav_con"> 
            <div><img src="./图片/2.jpg" alt=""></div>
            <div><img src="./图片/3.jpg" alt="">/div>
            <div><img src="./图片/4.jpg" alt=""></div>
        </div>
</div>
 

<script src="./vue.js"></script>
<script>
    let vm = new Vue({
        el:'.tab',
        data:{
        currentIndex:0, //定义一个索引
        list:[{
            id: 1,
            title:'图片一',
            path:'./图片/2.jpg'
        },{
            id: 2,
            title:'图片二',
            path:'./图片/3.jpg'
        },{
            id: 3,
            title:'图片三',
            path:'./图片/4.jpg'
        }]},
        methods:{
         change(index){   
            vm.currentIndex = index;//通过参数获得索引
         }
        }
    })
</script> 

<div class="tab">
<div class="nav">
    <a :class="currentIndex==index?'hover':''" href="javascript:;" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"   v-on:click="change(index)"  :key="item.id" v-for="(item,index) in list">{{item.title}}</a>
</div>
<div class="nav_con"> 
    <div :class="currentIndex==index?'center':''" :key="item.id" v-for="(item,index) in list"><img :src="item.path" alt=""></div>
</div>
</div>