PageHide event not working in iPad 2 (iOS 9.3.2)

PageHide event not triggered while the browser/browser tab closing in Safari and Chrome (IPad). It is working fine in MacBook (OS X).


Code used.

window.addEventListener("pagehide", function () {

return "You have not yet saved your data";

});

PageHide event not working in iPad 2 (iOS 9.3.2)
 
 
Q