Mastering ServiceNow Scripting

If

The if tag in Jelly script works in a similar way to a JavaScript if statement. It is used to run code if a set condition is met. As we can set if statements in JavaScript, whether you want to use the Jelly if rather than the JavaScript if is up to you.

We can use the if tag to check whether a GlideRecord object has any records inside it. Let's have a look at how this is done using our example from the evaluate tag:

<g2:evaluate var="jvar_onHoldIncidents" object="true" jelly="true">    var holdIncident = new GlideRecord('incident');    holdIncident.addQuery('state', jelly.jvar_onHoldState);    holdIncident.query();    holdIncident;</g2:evaluate><j:if test="${!jvar_onHoldIncidents.hasNext()}">   No on hold incidents.</j:if><j:if test="${jvar_onHoldIncidents.next()}"> ...