How to show an alert message on the form if user clicked on a button?

[Devi12]

Hi,

I have requirement to show an alert message on the form, if user clicks on a button. In "sn_vul_vulnerable_item" form I need to make the "Assigned to" field as mandatory when user clicks on a button "Request exception". I made it using onSubmit client script, but it is working only when user clicked on save or update button. I need to make the "Assigned to" as mandatory if user clicks on "Request exception". How can I do that?

Below are the attachments:

Currently I made Assigned to field as mandatory using dictionary override. This is also not working. 

[Devi12 · Accepted solution]

Hi Uday,

Thanks for the reply.

I already have the OOTB UI action named "Request Exception". In that UI action script I have added your script, not working.

[Anil Lande]

Check below link for solution:

https://www.servicenow.com/community/developer-forum/how-to-make-fields-mandatory-in-ui-action/m-p/1...

https://servicenowguru.com/system-ui/ui-actions-system-ui/client-server-code-ui-action/

[Virendra S]

Please update the UI action (Request exception) script as below.

var assignedTo = g_form.getValue(**)  ; // get value of "Assigned to"

if(!assignedTo){ // If assignedto is empty

    g_form.setMandatory(**,true) ; // set assigned to as mandatory

   g_form.save();

}

[Devi12]

Hi Virendra,

Thanks for the reply.

I tried the above script in UI action, it is not working

[Ankur Bawiskar]

@Devi12 

please share your UI action script and UI action screenshot