Help with scripting mandatory fields if the field's choice list changes.

[mitchmo2]

What I have set up here is when there are options in a choice list based upon the previous field choice then that field should become mandatory. So the user has to fill it in. Right now I am running this on onSubmit command, but when I change the choice list in the first field to something that doesn't have any other options in the other 2 fields, the fields stay mandatory even though there are no longer any options to choose from. Any ideas how I can modify my code so where the fields will be mandatory only if there are options in the fields?

I'm guessing I need to put  g_form.setMandatory('subcategory',false);  g_form.setMandatory('u_subcategory_2',false); somewhere.

https://community.servicenow.com/community?id=community_question&sys_id=eed5f94adb382f848e7c2926ca961917

Here's a link to my previous post about this to explain the category situation I am trying to set up.

function onSubmit() {

 if(g_form.getValue("subcategory") == ""){//verify field names
   
    var f1 = g_form.getControl("subcategory");

  if(f1.options.length != 1 ){ //check if the dropdown has choices
     g_form.setMandatory('subcategory',true);
     g_form.addErrorMessage("The following mandatory fields are not filled in: Subcategory");
     return false;
   }
 }
if(g_form.getValue("u_subcategory_2") == ""){//verify field names
   
    var f2 = g_form.getControl("u_subcategory_2");
 if(f2.options.length != 1 ){ //check if the dropdown has choices
    g_form.setMandatory('u_subcategory_2',true);
    g_form.addErrorMessage("The following mandatory fields are not filled in: Subcategory2");
    return false;
}
}

}

[mitchmo2 · Accepted solution]

Hey I ended up doing this: Thank you for the help

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
	  if (isLoading || newValue === '') {
      g_form.setMandatory('subcategory', false);
		 
		  return;
   }
	var myVar;
	myVar = setTimeout(alertFunc, 400);
		
}
function alertFunc() {
    
	if(g_form.getValue("subcategory") == ""){//verify field names
		
		var f1 = g_form.getControl("subcategory");
		
		
		if(f1.options.length != 1 ){ //check if the dropdown has choices
		
			g_form.setMandatory('subcategory',true);
			return;
		}
		else{
			
			g_form.setMandatory('subcategory', false);
			return;
		}
	}
	
}