@change事件传参

@change="(value)=>handleChange(value, item,index)"
这样可以接收index参数区分是哪一个组件事件，又可以接收子组件传的value值

<div class="boxItem" v-for="(item, index) in checkPeopleList" :key="index">
      <div class="boxItem-title">审核人员 {{ index + 1 }}</div>
      <div class="selectPeople">
        <el-select v-model="item.selectedValues" placeholder="选择审核人员" size="large" style="width: 240px">
          <template #empty="{}">
            <AreaTree @change="(value)=>handleChange(value, item,index)" />
          </template>
        </el-select>
        <!-- <el-cascader v-model="item.selectedValues" :options="options" :show-all-levels="false" /> -->
      </div>
      <!-- 新增删除按钮 -->
      <div class="delete-button-container">
        <el-button v-if="index !== 0" @click="removeCheckPeople(index)" type="danger" circle size="small"
          icon="Delete"></el-button>
      </div>

      <!-- 新增的容器 -->
      <div class="bottom-center-line-container">
        <el-button v-if="!item.hideAddButton" @click="addCheckPeople()" class="add-button" type="primary" circle
          size="small"><el-icon>
            <Plus color="#ffffff" size="" />
          </el-icon></el-button>
      </div>
    </div>

如果在模板中直接这样接收value参数，那么就value就拿不到
@change="handleChange(value, item,index)