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
Contributors
Preface
Index

UI actions


UI actions are generally considered to be a server-side script, but they can also run as client-side script, too. We will cover an introduction to UI actions and their basic usage in the server-side basics in the next chapter. Here, though, we will look at the more advanced techniques of running UI actions on the client side.

Client-side UI actions

To change a UI action to run client-side script, we first need to check the client field tick box. This brings up some additional fields, including the checkboxes to select which list versions the UI actions will be compatible with, but the main new field we are interested in is called onClick

The onClick field runs the client code contained inside it when the UI action is selected. Visually, this is only a small field, and not that appropriate for code, so most developers call a function in this field and define the function in the main script field.

Let's look at an example of this usage. For the code in the onClick field, we only need...