// html  
<div class="ans-item" v-for="(item1,index1) in item.answer" :key="index1">
        <div class="item"> 
              <div class="circle" :ref="setItemRef">{{anslist[index1]}}</div>
              <div class="content">{{item1}}</div>
        </div>
 </div>

//js
 setup() {

    let itemRefs = ref([])
    const setItemRef = el => {
      if (el) {
        itemRefs.value.push(el)
      }
    }




       //调用修改样式
  //  itemRefs.value[index].style.background = '#f56c6c'


}