//:class="{ choosed: tempChoosedKey == item.key }"
//当tempChoosedKey 的值和item.key相等时,设置classname为choosed
<div class="chooseItem"
:class="{ choosed: tempChoosedKey == item.key }"
v-for="item in tabList"
@click="tabChange(item.key)">
{{ item.label }}
</div>