Alert Dialog

An Alert Dialog is a descendant window of the primary application window. When open, the user may not interact with the primary application.

Press Tab and Shift+Tab while the Alert Dialog is open, and you will see that the primary application window is not interactable.

On MacOs, press CMD + F5 to enable VoiceOver and try it for yourself.

Oh no!

This is an alert dialog! This is some critical information.