关于vue.js:vue选项卡

<template v-if="!isLogin">         <template id="onCh">              <div v-for="(item, index) in rightMenu" :key="index" @click="addClass(index)" v-bind:class="{ ischeck: index == current }">                      <router-link class="oneli icobtn" :to="{path:item.path}" exact v-if="item.ico" >                               <img :src="item.ico" alt="" />                               <span>111{{ item.title }}</span>                      </router-link>                      <router-link class="oneli rigisterbtn" :to="{path:item.path}" exact v-else>                               <span>222{{ item.title }}</span>                      </router-link>              </div>         </template></template>

addClass(index) {      // var cun = sessionStorage.name = index;      // console.log("cun",cun);      // var na = sessionStorage.getItem("name",index);      // console.log("na",na);      this.current = na;      },