v-for:
v-for =‘item,key of data‘
v-for =‘item,index in data‘
@click=‘pop.show=false‘
<li id="sheng" :class="{‘citySel‘:pop.tab==1}" @click=‘pop.tab = 1;‘>省份</li> <li id="shi" :class="{‘citySel‘:pop.tab==2}" @click=‘pop.tab = 2‘>城市</li>
原文：https://www.cnblogs.com/liubingyjui/p/12326148.html