Create popup if user tries to close app?

[romanmg]

I think this has been explored in these threads:

Exit Intent Popup Based On Cursor Movement?

Is there a way to sense where the cursor is on the screen and display a pop up when the cursors position is X/Y?

How to know user leaving the current page

how to check whether user navigate or click back button from browser on certain page? I want to show popup confirmation before they leave. Is that possible?