How to Set Field Mandatory on UI Page

[AlwinJebakY]

Hi,

I need to make a few fields mandatory on a UI Page.

I already tried:

1. Adding the required attribute in HTML
2. Using gel() and setting required = true
3. Trying CSS-based approaches

None of these worked in my case.

Is there any OOB functionality in ServiceNow to make UI Page fields mandatory, similar to form mandatory behavior?

If not, what is the best practice to enforce mandatory validation on UI Pages?


Thanks