270046 2024-02-24 20:02:56 -0800 Add UA Stylesheet rules for `img` with `sizes=auto` 2024-02-25 07:57:53 -0800 1 1 1 Unclassified WebKit CSS WebKit Nightly Build Unspecified Unspecified RESOLVED DUPLICATE 253143 WPTImpact P2 Normal --- 1 ahmad.saleem792 webkit-unassigned annevk ntim oldest_to_newest 2016670 0 ahmad.saleem792 2024-02-24 20:02:56 -0800 Hi Team, While going through HTML Spec, I noticed that we are missing following UA stylesheet rule: https://html.spec.whatwg.org/#images-3 img:is([sizes="auto" i], [sizes^="auto," i]) { contain: size !important; contain-intrinsic-size: 300px 150px; } ___ It seems that we have WPT tests as well: https://wpt.fyi/results/html/rendering/replaced-elements/images/img-sizes-auto.html?label=master&label=experimental&aligned= I think above will progress first two tests. Although every browser is failing so it might be new standard or standard behind flag. I can find this in our standard-position: https://github.com/WebKit/standards-positions/issues/9 but it seems to be for 'lazy loaded' images. Appreciate if someone can confirm if it is safe to add or we have to do something before. Thanks! 2016702 1 annevk 2024-02-25 07:57:53 -0800 *** This bug has been marked as a duplicate of bug 253143 ***