Retain Old value of a field using Onchange client script

[Community Alums]

Hi,

There are 2 fields on the form :

test : choice field (yes/no)

test1 : reference field

Case 1 : If no is selected from test, test1 should clear the value if it has any.

Case 2 : If yes is selected in test, then test1 should be mandatory.

Case 3 : In test, if first 'yes' is selected, then no and then again changed to yes, then it should return the old value that it contained in test1.

I want to implement this by using an Onchange client script.

Can someone please assist.

Thanks in Advance

Thanks,

Sunil Raikwar

[ghsrikanth]

Please try this script - onChange on test

function onChange(control, oldValue, newValue, isLoading, isTemplate) {

    if (isLoading || newValue == '') {

          return;

    }

    var oldTest1 = '';

    //Type appropriate comment here, and begin script below

  if(newValue == 'no'){

  var oldTest1 = g_form.getValue('test1');

  g_form.setValue('test1','');

  }

  else if(newValue == 'yes'){

  if(!gs.nil(oldTest1))

  g_form.setValue('test1',oldTest1);

  g_form.setMandatory('test1');

  }

}

Mark if it is helpful or correct, feedback is appreciated

[Community Alums]

Thanks Srikanth for the response

But unfortunately the solution isn't working.

Getting below error :

Below is the thing happening :

When I select no, it does clear value but makes field test 1 mandatory, which should not be the case.

And when I select yes, it gives me the above error.

Thanks,
Sunil Raikwar

[Pradeep Sharma]

Hi Sunil,

gs is not supported at client side. It only works at server side.

[Pradeep Sharma]

Hi Sunil,

Here is the client script you have to run. However to retrieve the old value of "u_test1" you have to fetch the scratchpad data from client script. Please refer section 7 here for more info on how to use scratchpad.

Scripting in Business Rules - ServiceNow Wiki

Script :

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
   if (isLoading || newValue == '') {
   return;
   }
   var oldTest1 = '';
   //Type appropriate comment here, and begin script below
   if(newValue == 'no'){
   g_form.setValue('u_test1','');
   }
   else if(newValue == 'yes'){
   if(oldTest1 = '')
   {
   g_form.setMandatory('u_test1', true);
   }
   else

   {
   g_form.setValue('u_test1', 'SCRATCHPAD'); //set the value here based on scratchpad variable
   g_form.setMandatory('u_test1', true);
   }
   }
}