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Mastering ServiceNow Scripting

You're reading from   Mastering ServiceNow Scripting Leverage JavaScript APIs to perform client-side and server-side scripting on ServiceNow instances

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Product type Paperback
Published in Feb 2018
Publisher Packt
ISBN-13 9781788627092
Length 226 pages
Edition 1st Edition
Languages
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Author (1):
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Andrew Kindred Andrew Kindred
Author Profile Icon Andrew Kindred
Andrew Kindred
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Table of Contents (14) Chapters Close

Preface 1. Getting Started FREE CHAPTER 2. Exploring the ServiceNow Glide Class 3. Introduction to Client-Side Scripting 4. Advanced Client-Side Scripting 5. Introduction to Server-Side Scripting 6. Advanced Server-Side Scripting 7. Introduction to Custom Pages 8. Scripting with Jelly 9. Debugging the Script 10. Best Practices 11. Deployments with the Update Sets 12. Building a Custom Application Using ServiceNow Scripting 13. Other Books You May Enjoy

Coding best practices


When scripting, there are many ways to achieve the same goal, but keeping code efficient can make it much easier to maintain and work on in the future. Using a few system resources is usually encouraged too, as this decreases loading times and the load on the data center in the cloud.

You will often find that older instances suffer from poor performance because best practices were not adhered to during development. I have been part of minor projects simply to make code more efficient before, and because these are often associated with slow loading times, it can be a great improvement for the user base.

In this section, we will look at how to make sure your script adhers to best practices and how to avoid common mistakes.

First, one type of scripting that is quite common is nested if statements. This is an if statement after an if statement and is often used to catch several potential values for the same variable. We can see a server-side example of what this looks like...

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