vue如何判断dom的class

vue点击给dom添加class然后获取含有class的dom <div class=chose-ck v-for=(item,index2) key=index2 ref=chosebox> <p>{{item.name}}</p> &lt;dt v-for=(item2,index) in item.childsCurGoods :key=item2.id :class=index==iac[index2]?'check':'' :id=item2.id :data-c