How to set Catalog field value based on 2 other variables

[Aaron Duncan]

I have a requirement where based on 2 variables in the same catalog item, it would set a value into a 3rd variable. This needs to be able to update as the values on the 1st 2 variables change.  The 3rd variable has 2 values that can be set into it. 

What would be the best way to make this happen? 

[Steven Parker · Accepted solution]

2 onChange Client Scripts for the first 2 variables.  Use the same script for each.  Script should look something like the below.  Just add more if statements as needed.  With 2 onChange scripts, this script would run when either of the first 2 variables changed, but only set field 3 when both field 1 and 2 were whatever you wanted them to be.

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

//Get the first 2 variable values
var field1Val = g_form.getValue('field1');
var field2Val = g_form.getValue('field2');
	
	//Set variable 3 to whatever you need it to be based on the first 2 variables
    if (field1Val == 'Whatever Value' && field2Val == 'Whatever Value'){
       g_form.setValue('field3','First Value');
    }

    if (field1Val == 'Whatever Next Value' && field2Val == 'Whatever Next Value'){
       g_form.setValue('field3','Second Value');
    }
    	
   
}

[Asif Khan M]

Hi @Aaron Duncan ,

You  might find this article helpful :

https://www.servicenow.com/community/developer-articles/creating-dependent-variables-in-service-cata...