Bug 78494 - When transforms are transitioned to cause overflow, scrollbars do not appear until transition finishes
Summary: When transforms are transitioned to cause overflow, scrollbars do not appear ...
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: CSS (show other bugs)
Version: 528+ (Nightly build)
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
URL: https://bugzilla.mozilla.org/attachme...
Keywords:
Depends on:
Blocks:
 
Reported: 2012-02-13 06:37 PST by Boris Zbarsky
Modified: 2023-08-16 15:25 PDT (History)
3 users (show)

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Description Boris Zbarsky 2012-02-13 06:37:21 PST 
See https://bugzilla.mozilla.org/attachment.cgi?id=596623 for a testcase.

Gecko and Presto get this right: the scrollbar appears once there is overflow.
Comment 1 Simon Fraser (smfr) 2012-02-13 19:04:51 PST 
This is somewhat by design. We don't want to slow down accelerated transform animations by having to recompute overflow for every frame. Perhaps we could recompute overflow at the start of the transition, using the final transform value though.
Comment 2 Boris Zbarsky 2012-02-13 19:08:49 PST 
If you think the spec should allow this behavior, then it should probably do so explicitly...
Comment 3 Ahmad Saleem 2023-08-16 15:25:35 PDT 
WebKit ToT (266957@main) only get 'horizontal' scrollbar once the 'text' go out of window view while Firefox Nightly 118 and Chrome Canary 118 show 'horizontal' scrollbar from start.