chrome extension

Tab Spoofer
Test Page

Switch tabs, click away, or move your mouse out.
If the extension is working, nothing below should trigger.

Monitoring — switch tabs to test
Page Visibility API
visible
triggered: 0
Window blur / focus
focused
triggered: 0
Document mouseleave
inside
triggered: 0
Focusout (no target)
active
triggered: 0
Event log
Detection methods
document.visibilityState / document.hiddenlistening
visibilitychange eventlistening
window blur / focus eventslistening
document mouseleavelistening
focusout (no relatedTarget)listening
document.hasFocus()listening