Bug 327636

Summary:	[Site Isolation] Fullscreen from a cross-site iframe fires resize before fullscreenchange
Product:	WebKit	Reporter:	zak ridouh <zakr>
Component:	New Bugs	Assignee:	zak ridouh <zakr>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	fred.wang, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified
Bug Depends on:
Bug Blocks:	276855, 287102

zak ridouh

Reported 2026-10-14 21:25:34 PDT

The UI process only told the main frame's web process to defer and flush resize, scroll and intersection observation events around a fullscreen transition, so a cross-site iframe fired resize before fullscreenchange. Send those messages to every web content process that hosts the page.

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Radar WebKit Bug Importer

Comment 1 2026-10-14 21:25:43 PDT

<rdar://problem/190086036>

zak ridouh

Comment 2 2026-10-14 21:27:20 PDT

Pull request: https://github.com/WebKit/WebKit/pull/77094

EWS

Comment 3 2026-10-20 16:00:40 PDT

Committed 324301@main (2f0d2c1e9112): <https://commits.webkit.org/324301@main> Reviewed commits have been landed. Closing PR #77094 and removing active labels.

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