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Learning ServiceNow

You're reading from   Learning ServiceNow Administration and development on the Now platform, for powerful IT automation

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Product type Paperback
Published in Jun 2018
Publisher
ISBN-13 9781788837040
Length 388 pages
Edition 2nd Edition
Languages
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Author (1):
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Tim Woodruff Tim Woodruff
Author Profile Icon Tim Woodruff
Tim Woodruff
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Toc

Table of Contents (17) Chapters Close

Preface 1. The Interface FREE CHAPTER 2. Lists and Forms 3. UI Customization 4. Understanding Data and Relationships 5. Tasks and Workflows 6. UI and Data Policies 7. User Administration and Security 8. Introduction to Scripting 9. The Server-Side Glide API 10. The Client-Side Glide API 11. Server-Side Scripting 12. Client-Side Scripting 13. Service Portal Scripting 14. Debugging 15. Pro Tips Index

UI scripts


UI scripts are quite similar to script includes. While script includes are blocks of server-side code, accessible to any server-side script, UI scripts are blocks of code that are available to any client-side script on a page on which they load.

Global UI scripts are relatively simple. They are available on any form in the system, as they are sent from the server to the browser along with all of the other relevant information (the record data, client scripts, and other data). When the UI script is set to Global, any other client-side script can access the code within it. For example, imagine that we have a UI script with the following code in it:

function sayHello() { 
    alert('Hello!'); 
} 

If we mark this UI script as global, then on any client script or UI policy script, we can call sayHello(), and the user will see an alert message that says Hello!, even though the function that does that action isn't defined anywhere in the script that calls it.

Furthermore, if we don't wrap...

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