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Mastering ServiceNow Scripting

By : Kindred

3.4 (7)

Buy this Book

Mastering ServiceNow Scripting

3.4 (7)

By: Kindred

Buy this Book

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.

Preface

Who this book is for

What this book covers

To get the most out of this book

Get in touch

Disclaimer

Free Chapter

Getting Started

Configuration versus customization

To script or not to script?

Types of script

Script execution

Introduction to scripting

Script editor

Summary

Exploring the ServiceNow Glide Class

Using ServiceNow exposed JavaScript APIs

Server-side Glide classes

Client-side Glide classes

Script examples

Summary

Introduction to Client-Side Scripting

Client scripts

UI policies

How and when to write client-side scripts

Testing client-side scripts

Script examples

Summary

Advanced Client-Side Scripting

UI actions

AJAX calls

Script examples

Summary

Introduction to Server-Side Scripting

Business rules

UI actions

Access controls

How and when to write server-side scripts

Testing server-side scripts

Script examples

Summary

Advanced Server-Side Scripting

Script includes

Scheduled jobs

Background scripts

Workflow scripts

Event management

Script actions

Script examples

Summary

Introduction to Custom Pages

Introduction to Jelly

UI pages

Script examples

Summary

Scripting with Jelly

Jelly scripting

UI macros

Script examples

Summary

Debugging the Script

The script debugger

The session debugger

The Field Watcher

Debugging applications

The JavaScript Log and Debug window

Debugging REST

SOAP debugging

Summary

Best Practices

Coding best practices

Business rule best practices

Client script best practices

Debugging tools best practices

Logs and queues best practices

System performance best practices

Summary

Deployments with the Update Sets

When to use update sets

How to use scope with update sets

Transferring update sets between instances

Update set pitfalls

Update set best practices

Summary

Building a Custom Application Using ServiceNow Scripting

Creating a custom application with ServiceNow scripting

End-to-end development

Testing

Deployment

Summary

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Debugging the Script

In this chapter, we will be taking a look at debugging. Debugging is a very important aspect of creating working ServiceNow scripts. We will be taking a look at the script and session debugger, and how these are both used. We will then look at field watchers, debugging applications, the JavaScript log, and debug window. Finally, we will see how to debug REST and SOAP messages in a ServiceNow instance.

In this chapter, we will look at the following topics: