Before starting with Mastering ServiceNow Scripting, it is advised that you have a good understanding of the ServiceNow platform. It is advisable to have a system administrator certification or similar knowledge, and to be aware of forms, lists, and tables in ServiceNow. You should also be able to comfortably navigate around a ServiceNow instance.

Some knowledge of JavaScript will be advantageous, but is not compulsory as the examples given will give you script to try and get started with.

It is advised to have a ServiceNow instance that you can use to try out the examples and create some scripts of your own. If you do not have an instance at this point, personal developer instances (PDI's) can be requested from ServiceNow for users who would like to improve their ServiceNow skills.

You can download the example code files for this book from your account at www.packtpub.com. If you purchased this book elsewhere, you can visit www.packtpub.com/support and register to have the files emailed directly to you.

You can download the code files by following these steps:

1. Log in or register at www.packtpub.com.
2. Select the SUPPORT tab.
3. Click on Code Downloads & Errata.
4. Enter the name of the book in the Search box and follow the onscreen instructions.

Once the file is downloaded, please make sure that you unzip or extract the folder using the latest version of:

• WinRAR/7-Zip for Windows
• Zipeg/iZip/UnRarX for Mac
• 7-Zip/PeaZip for Linux

The code bundle for the book is also hosted on GitHub at https://github.com/PacktPublishing/Mastering-ServiceNow-Scripting. In case, there's an update to the code, it will be updated on the existing GitHub repository.

We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

We also provide a PDF file that has color images of the screenshots/diagrams used in this book. You can download it here: https://www.packtpub.com/sites/default/files/downloads/MasteringServiceNowScripting_ColorImages.pdf.

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "The onLoad client script type runs script when a form is loaded."

A block of code is set as follows:

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
    if (isLoading || newValue === '') {
        return;
    }

    //Type appropriate comment here, and begin script below

}

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "To access the studio navigate to System Applications | Studio. "