Compat issue: document.addEventListener / window.addEventListener('visibilitychange')

[jakub-g]

I just found out today this compatibility issue:

// works in Chrome, Firefox, Safari
document.addEventListener("visibilitychange", onVisChange);

// works in Chrome, Firefox but NOT in Safari; in Safari it's a no-op
window.addEventListener("visibilitychange", onVisChange);

The spec only talks about Document, I'm wondering if spec should explicitly state that this should be supported on window for better portability?

[cdumez]

What version of Safari are you testing? I thought we fixed that not too long ago.

[jakub-g]

This was in 12.1 / 13.1, I don't have 14.0 (only can test on BrowserStack)

[cdumez]

I just tested and it is working as intended in Safari 14.0. As I said, we fixed this fairly recently. The event was not marked as bubbling in WebKit: http://trac.webkit.org/r260483.

Can be closed? The specification says "Fire a simple event named visibilitychange that bubbles". The "that bubbles" part is what makes the event get dispatched on the Window.

[jakub-g]

Awesome. Thx for quick reply and verification 👍