settimeout / Sleep / wait in ServiceNow

setTimeout in ServiceNow

function onChange(control, oldValue, newValue, isLoading) { 
if (newValue == oldValue){ 
return; 
}   
window.setTimeout(Test,4000); 
}   
function Test(){ 
// do your stuff here alert('Wait for 4 Seconds.'); 
var caller = g_form.getReference('<field_name>'); 
 
} 

Note: You should always use setTimeout(Test,4000) instead of setTimeout(Test(),4000); 

Sleep in ServiceNow

Note : We cant user gs.sleep function in scooped application it has to be used in non-scooped application

sleep: function (duration) {
   gs.sleep(duration);
},