ServiceNow uses JavaScript as a language for the majority of the scripts you can write or edit. If you already have a background in JavaScript, then you will certainly have a head start when it comes to writing your first scripts. The JavaScript engine used for writing scripts is updated as new versions of ServiceNow are released. The other language used is called Jelly. Not many people outside of the ServiceNow space are aware of Jelly, and it certainly wasn't a language I was familiar with before working with ServiceNow. Fortunately, Jelly is not used in the majority of scripts, and we'll cover how and where to use it in a later chapter.
Before you start writing your first script, it is important to check whether ...
