<el-cascader ref="cascaderRef" style="width:100%" :options="area" v-model="ruleForm.area" change-on-select
clearable @change="areaChange" placeholder="请选择省/市/县（区）" filterable
:props="{ value: 'code', label: 'name', children: 'children' }"></el-cascader>
解决办法：
this.$refs.cascaderRef[0].dropDownVisible = false
this.$refs.cascaderRef.dropDownVisible = false;