Comments by Member 12024996 (Top 1 by date)

I have looked into this and I now understand why you cannot do anything but show a standardised modal dialog with buttons "Leave this Page" and "Stay on this Page". In the old days, you could close a tab and another one would open and it was difficult to get out of the site you were visiting. Nowadays, you can only choose to leave or stay, as well as do other things. But the other things only happen after you answer that first question, and rightly so, in my opinion, because it means that you can choose to leave the page without it doing anything more, like popping up other tabs or windows.