visibilitychange event is not triggered when switching program/window with ALT+TAB or clicking in taskbar

Question

The problem is with the behaviour of the event \"visibilitychange\".

It\'s triggered: - When I switch to a different tab inside the browser window.

Answer 1

A working solution is proposed described here: https://stackoverflow.com/a/9502074/698168. It uses a combination of the W3C Page Visibility API, blur/focus and mouse movements. Hidden HTML pages related to Alt+Tab are identified in a probabilistic way (i.e. you cannot determine if your page is hidden with 100% accuracy).