265377 2023-11-27 06:55:37 -0800 filter doesn't establish a containing block like transform 2025-06-06 22:04:51 -0700 1 1 1 Unclassified WebKit Layout and Rendering WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 emilio mattwoodrow bfulgham ntim simon.fraser webkit-bug-importer zalan oldest_to_newest 1994922 0 468765 emilio 2023-11-27 06:55:37 -0800 Created attachment 468765 test-case See test-case. Per spec: > A value other than none for the filter property results in the creation of a containing block for absolute and fixed positioned descendants unless the element it applies to is a document root element in the current browsing context. The list of functions are applied in the order provided. https://drafts.fxtf.org/filter-effects-1/#FilterProperty 1996711 1 webkit-bug-importer 2023-12-04 06:56:17 -0800 <rdar://problem/119130847> 2122090 2 mattwoodrow 2025-06-05 21:14:42 -0700 Pull request: https://github.com/WebKit/WebKit/pull/46408 2122310 3 ews-feeder 2025-06-06 22:04:49 -0700 Committed 295958@main (10fb96ea8b68): <https://commits.webkit.org/295958@main> Reviewed commits have been landed. Closing PR #46408 and removing active labels. 468765 2023-11-27 06:55:37 -0800 2023-11-27 06:55:49 -0800 test-case file_265377.txt text/html 284 emilio PCFkb2N0eXBlIGh0bWw+DQo8c3R5bGU+DQouZmlsdGVyIHsgDQogIGZpbHRlcjogYmx1cigwKTsN CiAgYmFja2dyb3VuZC1jb2xvcjogYmx1ZTsNCiAgd2lkdGg6IDEwMHB4Ow0KICBoZWlnaHQ6IDEw MHB4Ow0KfQ0KDQouYWJzcG9zIHsNCiAgcG9zaXRpb246IGFic29sdXRlOw0KICBpbnNldDogMDsN CiAgYmFja2dyb3VuZC1jb2xvcjogcmdiYSgwLCAyNTUsIDAsIC41KQ0KfQ0KPC9zdHlsZT4NCjxk aXYgY2xhc3M9ImZpbHRlciI+DQogIDxkaXYgY2xhc3M9ImFic3BvcyI+PC9kaXY+DQo8L2Rpdj4=