In previous versions of ServiceNow, Script fields consisted of little more than string text fields with some syntax highlighting. However, in Geneva and later, the Script fields have become more IDE-like. These fields which are designed to accept scripts now support more advanced syntax highlighting, error checking (otherwise known as Linting), and even some degree of intellisense-style code auto-completion for known APIs:

For server-side scripts with access to the current object for example, the new Script field IDE will even auto-complete and predict field names (though this only works on table-specific records after the record has been saved):

If it is not already activated on your instance, you can enable this functionality by activating the syntax editor plugin (com.glide.syntax_editor).

In the event of an error, the syntax editor will parse your code and attempt to detect the error for you, highlighting the appropriate line. If you attempt to submit...