295002 2025-06-25 18:55:38 -0700 [css-anchor-position-1] Scroll adjustment not applied for position:fixed anchored boxes 2025-06-30 10:57:14 -0700 1 1 1 Unclassified WebKit Layout and Rendering WebKit Local Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 289743 291856 1 fantasai.bugs koivisto bfulgham kiet.ho simon.fraser webkit-bug-importer zalan oldest_to_newest 2125912 0 fantasai.bugs 2025-06-25 18:55:38 -0700 Overview: We aren't applying scroll adjustments to position:fixed boxes, so they are separating from their anchors when the page is scrolled. Affected WPT Tests: * http://wpt.live/css/css-anchor-position/anchor-scroll-fixedpos.html This is a basic test for the functionality. * http://wpt.live/css/css-anchor-position/anchor-scroll-006.html This checks tracking for anchors in descendant scrollers. * http://wpt.live/css/css-anchor-position/anchor-scroll-007.html This checks tracking when multiple anchors are involved. * http://wpt.live/css/css-anchor-position/position-try-switch-to-fixed-anchor.html This checks the behavior when applied via position-try. Missing Tests: * Need to add a test for `position-area`. * Need to add a test to check that position-try fallbacks are triggered. 2125913 1 webkit-bug-importer 2025-06-25 18:55:54 -0700 <rdar://problem/154348421> 2126247 2 koivisto 2025-06-27 03:44:52 -0700 css/css-anchor-position/anchor-scroll-006.html is about per-axis scroll adjustments. css/css-anchor-position/anchor-scroll-007.html tests the "or" part of the statement "abspos has an anchor reference to its default anchor box or at least to something in the same scrolling context" css/css-anchor-position/position-try-switch-to-fixed-anchor.html requires position-try scrolling support in general 2126253 3 koivisto 2025-06-27 04:01:59 -0700 Pull request: https://github.com/WebKit/WebKit/pull/47291 2126745 4 ews-feeder 2025-06-30 10:57:12 -0700 Committed 296811@main (de4580fe7eee): <https://commits.webkit.org/296811@main> Reviewed commits have been landed. Closing PR #47291 and removing active labels.