Book Image

Mastering ServiceNow Scripting

By : Andrew Kindred
Book Image

Mastering ServiceNow Scripting

By: Andrew Kindred

Overview of this book

Industry giants like RedHat and NetApp have adopted ServiceNow for their operational needs, and it is evolving as the number one platform choice for IT Service management. ServiceNow provides their clients with an add-on when it comes to baseline instances, where scripting can be used to customize and improve the performance of instances. It also provides inbuilt JavaScript API for scripting and improving your JavaScript instance. This book will initially cover the basics of ServiceNow scripting and the appropriate time to script in a ServiceNow environment. Then, we dig deeper into client-side and server-side scripting using JavaScipt API. We will also cover advance concepts like on-demand functions, script actions, and best practices. Mastering ServiceNow Scripting acts as an end-to-end guide for writing, testing, and debugging scripts of ServiceNow. We cover update sets for moving customizations between ServiceNow instances, jelly scripts for making custom pages, and best practices for all types of script in ServiceNow. By the end of this book, you will have hands-on experience in scripting ServiceNow using inbuilt JavaScript API.
Table of Contents (18 chapters)
Title Page
Packt Upsell

The Field Watcher

The Field Watcher debugging functionality allows you to watch an individual field and monitor any changes that occur to that field. You can only watch one field at a time using the Field Watcher. If there is a particular field you can see changing, but are not sure what is modifying the value, this can be a helpful tool to use.

To watch a field, right-click on the field in the form view, and at the bottom of the context menu, you should see an option to watch the field. Once this has been selected, a small bug icon appears to show that the field is being watched, and a Field Watcher window appears from the bottom of the frame.

The Field Watcher frame shows any changes to the field, and using tick boxes in the Field Watcher window, you can switch which type of changes the Field Watcher will check for, for example, business rule, client script, and so on.

A good example to show the Field Watcher in action is to watch the priority field on an incident. If you then change the...