https://docs.servicenow.com/bundle/tokyo-platform-user-interface/page/use/using-forms/task/t_ConfigureWhenARelatedListLoads.html

If there are many related lists on a form or many records in the related lists, the form may load slowly. In Core UI, you can improve form response times by configuring related lists to load manually, on demand, or automatically, after the rest of the form loads.

(ServiceNow )

Haven't tested these all recently within global/local scopes, so feel free to have a play! option 1 use an encoded query embedded in the GlideRecord , e.g. var grProf = new GlideRecord ( 'x_cls_clear_skye_i_profile' ); grProf . addQuery ( 'status=1^ owner=NULL ' ); grProf . query (); even better use the glideRecord addNotNullQuery or addNullQuery option 2 JSUtil.nil / notNil (this might be the most powerful. See this link ) example: if ( current . operation () == 'insert' && JSUtil . notNil ( current . parent ) && ! current . work_effort . nil ()) option 3 there might be times when you need to get inside the GlideRecord and perform the check there, for example if the code goes down 2 optional routes depending on null / not null can use gs.nil : var grAppr = new GlideRecord ( 'sysapproval_approver' ); var grUser = new GlideRecord ( 'sys_user' ); if ( grUser . get ( 'sys_id' , current . approver )){

Classic UI : var sURL_editparam = gs . action . getGlideURI (). getMap (). get ( ' sysparm_aparameter ' ); if ( sURL_editparam == 'true' ) { gs . addInfoMessage ( 'parameter passed ); } Portal : var sURL_editparam = $sp . getParameter ( " sysparm_aparameter " ); if ( sURL_editparam == 'true' ) { gs . addInfoMessage ( 'parameter passed ); }

Call a script include to apply a reference qualifier on a catalog item variable: - variable reference qualifier dependent on another variable selection, in this case a variable referencing sys_user (requested_for) On the catalog item form. variable name to apply ref qual filter : retail_equipment variable reference qualifier (on cmdb table ): javascript : new refqual_functions (). lostStolen_getAssignedCIs (); client-callable script include ( refqual_functions) function : lostStolen_getAssignedCIs : function (){ //--called from variable set client script, for lost/stolen request (service catalog) gs . log ( current . variables . requested_for , 'retail_lostStolen_getAssignedCIs' ); return ( 'install_statusNOT IN8,7owned_by=' + current . variables . requested_for ); //owned_by=1269b79937f1060041c5616043990e41install_statusNOT IN8,7 },