Book Image

Mastering ServiceNow - Second Edition

Book Image

Mastering ServiceNow - Second Edition

Overview of this book

ServiceNow is a SaaS application that provides workflow form-based applications. It is an ideal platform for creating enterprise-level applications giving requesters and fulfillers improved visibility and access to a process. ServiceNow-based applications often replace email by providing a better way to get work done. The book steps through the main aspects of the ServiceNow platform, from the ground up. It starts by exploring the core architecture of ServiceNow, including building the right data structure. To add business logic and control data, and interactivity to user interaction, you will be shown how to code on both server and the client. You will then learn more about the power of tasks, events and notifications. The book will then focus on using web services and other mechanisms to integrate ServiceNow with other systems. Furthermore, you will learn how to secure applications and data, and understand how ServiceNow performs logging and error reporting. You will then be shown how to package your applications and changes, so they can be installed elsewhere and ways to maintain them easily. If you wish to create an alternative simple interface, then explore ways to make ServiceNow beautiful using Service Portal. By the end of the book, you will know the fundamentals of the ServiceNow platform, helping you be a better ServiceNow System Administrator or developer.
Table of Contents (18 chapters)
Mastering ServiceNow Second Edition
Credits
Notice
About the Author
About the Reviewer
www.PacktPub.com
Preface

Running client-side scripts


It would be inappropriate to have any chapter on client-side JavaScript without having a Hello, world! example at some point.

ServiceNow has a very simple JavaScript executor that is the equivalent of Background Scripts, but for the browser. On almost any page, pressing Ctrl + Shift + J will launch the JavaScript execution window:

Let's run some code:

alert('Hello, world!'); 

Once you press the Run my code button, you should see the little pop-up alert box, as you may expect.

Your web browser executes the very simple JavaScript that you put in the window. Virtually every browser has a JavaScript console that provides the same functionality, which you will probably prefer, but it is helpful that ServiceNow gives you a simple alternative for every browser.

Scope on the client

The JavaScript executor will always run code outside of any scope. But as we journey through the platform, we'll find several places where only certain functionality is allowed, just like the...