Field Watcher is a very efficient way to drill down troubleshooting to the form field level. With Field Watcher, you can view all the actions (UI policy, client script, business rules, and so on) which are being performed on the form.
To step through this recipe, you should have an active Service-Now instance and valid credentials with an admin role.
Open any standard web browser and type the instance address.
Log in to the instance using the credentials.
Click on the settings icon, as shown here:
Settings icon
Now you will be able to see the following pop-up screen, where you need to go to the Developer tab and turn on JavaScript Log and Field Watcher, as shown here:
Once the JavaScript Log and Field Watcher field is turned on, you will able to see the JavaScript Log and Field Watcher sections at the bottom of the page, as given here:
Debug window
Field Watcher provides the functionality to view what component is exactly working on...