the following code indicates that the pop-up box will be emptied when the pop-up box is closed, that is, clearFlag is false, in case there is cache information the next time the pop-up box is opened. 
 but when the pop-up box fills out the form, save and get the information. Once the method is cleared, the save will not get the data, which is the""value. Method 2 can get the value normally. 
 could you tell me the specific difference between the two methods: 
   clearFalg(){  
            if(this.clearFalg == false){
                //: this.subForm.tempInventoryId ="" 
                //:
                          this.subForm = {
                             tempInventoryId:""
                           }
                
            }
        }