jquery/jquery — pull request #1578 by markelog (2014-05-09 01:56:28+00:00)
Title: Effects: Reintroduce use of requestAnimationFrame

Pretty easy, takes advantage of Page Visibility API (PVAPI), provides incompatible change – animations in background tabs get paused, but obviously, in older browsers it would work as it works right now

In environment where PVAPI has not exist but `raf` has it could create issues described in #9381 but such environments live only in the past.

It worth to note that Opera 12.16 has not `requestAnimationFrame` but has PVAPI – in there, last animation will finish all it's frames but new animations would not be accepted, iOS < 7 has `requestAnimationFrame` and hasn't PVAPI, but in there `requestAnimationFrame` is prefixed, in iOS 7 `raf` is unprefixed but it also has PVAPI. Android 4.4 version has both API's and none in previous ones.

Why do i get a feeling that i'm miss something?