element中打开对话框表单验证就已经存在的解决办法

      <el-dialog
          :title="devicepb.title"
          :visible.sync="devicepb.open"
          class="alertlablefixtitle"
          :close-on-click-modal="false"
          @close="closeDialog"
          width="400px"
          append-to-body
        >
    <el-button @click="closeDialog">取 消</el-button>
         // 取消屏蔽开关弹框
closeDialog() {
  this.devicepb.open = false;
  this.$refs["devicePbFormData"].clearValidate();
},