vue如何判断dom的class

<div class="chose-ck" v-for="(item,index2) in colors" :key="index2" ref="chosebox">                  <p>{{item.name}}</p>                  <dt v-for="(item2,index) in item.childsCurGoods" :key="item2.id" :class="index==iac[index2]?'check':''" :id="item2.id" :data-chosename="item.name" :data-choseidname="item2.name" :data-chose="item.id" :data-id="item2.id" @click="chek(index2,index)" >                    {{item2.name}}                  </dt>                </div>js  chek(index2, index) {      this.iac[index2] = index      this.iac = this.iac.concat([]);      this.checkchose()    },    checkchose:function(){      var chose=this      var chosedom=chose.$refs.chosebox      console.log(chosedom)      for (var i=0;i<chosedom.length;i++) {        var children=chosedom[i].children        for (var j=0;j<children.length;j++) {            if(children[j].className=="check")          {            console.log(children[j])          }        }      }          }

if(children[j].className=="check")