How to check if a reference field in macro type variable is filled using a client script.SummaryThis article explains how check whether a reference field in UI macro type variable is filled so that variable mandatory can be enforced on submission using a onSubmit client script.InstructionsThe catalog variable UI macro can be something like: <g:ui_reference name="QUERY:active=true^roles=itil" id="assigned_to" table="sys_user" /> g_form.getControl can be used to check if this reference field in the UI macro is populated. Example: var isfilled = g_form.getControl("select_0IO:SYS_ID_OF_THE_MACRO_VARIABLE").length if (isfilled === 0) { return false;} else { return true;}