Bug 283709

Summary:

Content shift happening while a View Transition runs inside an iframe

Product:

WebKit

Reporter:

Bramus <bramus>

Component:

New Bugs

Assignee:

Nobody <webkit-unassigned>

Status:

RESOLVED DUPLICATE

Severity:

Normal

CC:

ntim, webkit-bug-importer

Priority:

Keywords:

InRadar

Version:

Safari Technology Preview

Hardware:

Mac (Apple Silicon)

OS:

macOS 15

Attachments:

Description	Flags
Screen Recording	none

Bramus

Reported 2024-11-26 02:43:04 PST

Created attachment 473373 [details] Screen Recording 1. Visit https://www.bram.us/2024/11/25/experiment-automatically-triggered-view-transitions-with-mutationobserver/#shortcomings 2. Click on the of the lime/hotpink/grey boxes in the embedded demo While the View Transition runs, the entire CodePen embed’s content gets shifted by a pixel. Not sure what is causing this, but it is happening. Note that the View Transition is actually running inside a nested iframe: you have the CodePen embed (which is an iframe) that contains the CodePen UI + the demo (which itself is also in an iframe). It is the outer iframe that is shifting, not just the demo one. See attached screen recording.

Attachments
Screen Recording (619.26 KB, video/mp4) 2024-11-26 02:43 PST, Bramus	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Radar WebKit Bug Importer

Comment 1 2024-12-03 02:44:14 PST

<rdar://problem/140844066>

Tim Nguyen (:ntim)

Comment 2 2025-01-02 18:02:02 PST

*** This bug has been marked as a duplicate of bug 274405 ***

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