Bug 127196 - Scrolling broken from div on same page as element with -webkit-animation
Summary: Scrolling broken from div on same page as element with -webkit-animation
Status: RESOLVED FIXED
Alias: None
Product: WebKit
Classification: Unclassified
Component: CSS (show other bugs)
Version: 528+ (Nightly build)
Hardware: Mac OS X 10.8
: P2 Normal
Assignee: Nobody
URL: https://gist.github.com/mponizil/8483445
Keywords:
Depends on:
Blocks:
 
Reported: 2014-01-17 15:31 PST by misha.ponizil
Modified: 2014-02-12 12:22 PST (History)
2 users (show)

See Also:

Attachments
Visual while scrolling the page (13.15 KB, image/png)
2014-01-17 15:31 PST, misha.ponizil 		no flags Details
Test (1.56 KB, text/html)
2014-02-12 12:10 PST, Simon Fraser (smfr) 		no flags Details
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Description misha.ponizil 2014-01-17 15:31:39 PST 
Created attachment 221498 [details]
Visual while scrolling the page

The following test case can describe the bug most accurately:

https://gist.github.com/mponizil/8483445

Notes:

(1) Body is scrollable
(2) Document includes an element that makes use of a -webkit-animation
(3) Top-level div has z-index defined (accompanied by some position declaration)
(4) Next-level div is position: fixed
(5) Next-level div provides scrolling with overflow-y: auto
(6) Children of scrolling div include position: relative

The bug goes away if any of the elements descending from the top-level div have -webkit-transform:translate3d(0,0,0)

Thanks!
Comment 1 misha.ponizil 2014-01-17 15:34:53 PST 
Also, when -webkit-transform:translate3d(0,0,0) is added to the top-level div (parent of position: fixed), the position: fixed declaration no longer fixes position relative to the browser window.
Comment 2 Brent Fulgham 2014-02-12 11:25:52 PST 
I can't seem to replicate this using your test case and the nightly r163899 on Mavericks. Can you confirm which version of Safari you encountered this?
Comment 3 Simon Fraser (smfr) 2014-02-12 12:10:40 PST 
Created attachment 223992 [details]
Test
Comment 4 Simon Fraser (smfr) 2014-02-12 12:11:03 PST 
I can't reproduce either.
Comment 5 misha.ponizil 2014-02-12 12:22:29 PST 
Apologies, I should have tested with the nightly build. I've encountered it using Safari 6.0.5 on OSX 10.8.5.

Confirming that it works with nightly Safari, thanks!