Bug 230813

Summary:

Toggling display:none on a video element is delayed

Product:

WebKit

Reporter:

Sam Wemyss <samuel.wemyss>

Component:

Media

Assignee:

Nobody <webkit-unassigned>

Status:

NEW

Severity:

Normal

CC:

jer.noble, kevin_neal, simon.fraser, webkit-bug-importer

Priority:

Keywords:

InRadar

Version:

Safari 14

Hardware:

Mac (Intel)

OS:

macOS 11

Attachments:

Description	Flags
Reduced test case showcasing the issue	none
Video demo of issue	none
Video demo of second issue, repeatedly triggered	none

Sam Wemyss

Reported 2021-09-26 20:02:08 PDT

Created attachment 439303 [details] Reduced test case showcasing the issue Safari 15. Though I believe it still occurs on 14 and lower. Issue: When toggling display on a parent container of a video there is a visual glitch: none -> block: The red background will render, then the video will appear. Happens less frequently block -> none: The video will disappear immediately but the red background will remain for a frame before being removed. This case is much more frequent than the former and can be repeatedly triggered without refreshing. This can be reproduced in the minimal test case attached. Expected: That the video and the red background appear and disappear simultaneously. Same as other browsers.

Attachments
Reduced test case showcasing the issue (1.42 KB, text/html) 2021-09-26 20:02 PDT, Sam Wemyss	no flags	Details
Video demo of issue (1.34 MB, video/mp4) 2021-09-26 20:04 PDT, Sam Wemyss	no flags	Details
Video demo of second issue, repeatedly triggered (266.24 KB, video/mp4) 2021-09-26 20:04 PDT, Sam Wemyss	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Sam Wemyss

Comment 1 2021-09-26 20:04:12 PDT

Created attachment 439304 [details] Video demo of issue Video demo of both issues occurring. Progress frame by frame to see the visual glitch clearly at both toggle points

Sam Wemyss

Comment 2 2021-09-26 20:04:56 PDT

Created attachment 439305 [details] Video demo of second issue, repeatedly triggered

Sam Sneddon [:gsnedders]

Comment 3 2021-09-27 01:11:43 PDT

Something compositing related, maybe?

Radar WebKit Bug Importer

Comment 4 2021-09-29 09:22:52 PDT

<rdar://problem/83674133>

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