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*moon...@google.com <moon...@google.com>, dr...@google.com <dr...@google.com>*Explainer *https://github.com/w3c/csswg-drafts/issues/7832#issuecomment-1338671264 <https://github.com/w3c/csswg-drafts/issues/7832#issuecomment-1338671264>https://github.com/w3c/csswg-drafts/issues/1636 <https://github.com/w3c/csswg-drafts/issues/1636>https://bugs.chromium.org/p/chromium/issues/detail?id=1379236 <https://bugs.chromium.org/p/chromium/issues/detail?id=1379236>* Specification *https://www.w3.org/TR/css-fonts-4/#font-prop <https://www.w3.org/TR/css-fonts-4/#font-prop>*Summary *When the font shorthand is specified all of its subproperties including font-size-adjust, font-kerning, font-feature-settings, font-optical-sizing and font-variation-settings should be reset to their initial values.Since Chrome wasn’t resetting some font subproperties before, there is a risk that content would rely on this bug. Therefore the ClusterTelemetry analysis was done for the top 10K webpages. Analysis of the ClusterTelemetry results can be found here <https://docs.google.com/document/d/1ZYjaZBthiN-yNioJkoqh-aqwC1NOgC-YpptiNlzfdZQ/edit?usp=sharing&resourcekey=0-h32BsErkkx1YizNffkR7LQ>. The results show it only affects 3 out of ~10K webpages and the changes in these 3 webpages can be considered minor. Furthermore, Firefox has already shipped this feature and it was also shipped in Safari Technology preview, so it will be soon shipped in Safari as well. This suggests the change can be safely landed on Chrome.*Motivation *When font shorthand is specified, then it means that the font has changed, so there is no point to apply the same set of settings for the new font (for example, the new font might not have features that were specified before or they may look completely different in the new font). Thus if the properties font-size-adjust, font-kerning, font-feature-settings, font-optical-sizing and font-variation-settings were set to non-initial value before, they should be reset.Chrome was already resetting some of it’s subproperties, like font-variant-*. In CSS WG issue #7832 <https://github.com/w3c/csswg-drafts/issues/7832#issuecomment-1338671264> it was recently resolved which of the font subproperties should be reset to their initial values. So this change adds resetting for font-size-adjust, font-kerning, font-feature-settings, font-optical-sizing and font-variation-settings. Firefox and Safari have already implemented this feature.*Blink component *Blink>Fonts <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EFonts>*Search tags *font shorthand <https://chromestatus.com/features#tags:font%20shorthand>, reset <https://chromestatus.com/features#tags:reset>, font-size-adjust <https://chromestatus.com/features#tags:font-size-adjust>, font-kerning <https://chromestatus.com/features#tags:font-kerning>, font-feature-settings <https://chromestatus.com/features#tags:font-feature-settings>, font-optical-sizing <https://chromestatus.com/features#tags:font-optical-sizing>, font-variation-settings <https://chromestatus.com/features#tags:font-variation-settings>*TAG review *Already shipped in other browsers, see below, no TAG review required.*TAG review status *Not applicable, existing standard, shipped in other UAs*Risks Interoperability and Compatibility *Low, feature is already shipping in Firefox (teste in Firefox 108.0.1) and Safari (the feature is shipped in Firefox and Safari Technology Preview). According to results of ClusterTelemetry run on top 10K webpages, this feature affects only 3 from ~10K webpages and doesn’t cause major visible page breakages. More information can be found in ClusterTelemetry results analysis <https://docs.google.com/document/d/1ZYjaZBthiN-yNioJkoqh-aqwC1NOgC-YpptiNlzfdZQ/edit?usp=sharing&resourcekey=0-h32BsErkkx1YizNffkR7LQ>.Gecko: Shipped/Shipping (https://github.com/w3c/csswg-drafts/issues/1636#issuecomment-319966794 <https://github.com/w3c/csswg-drafts/issues/1636#issuecomment-319966794>) Gecko is already resetting all the required font subproperties, shown in the link above,font-synthesis-* should be "Cascaded Independently" according to spec <https://www.w3.org/TR/css-fonts-4/#font-prop>: https://github.com/w3c/csswg-drafts/issues/7832#issuecomment-1338671264 <https://github.com/w3c/csswg-drafts/issues/7832#issuecomment-1338671264>Also tested in Firefox stable 108.0.1, the feature is working.WebKit: Shipped/Shipping (https://github.com/WebKit/WebKit/commit/9de002d111c74dfffa39582a67d6af89b9abf21c#diff-eeea910564f86ae74d641501cfc2459d985b2446fd9115817b0b1f7763d60589 <https://github.com/WebKit/WebKit/commit/9de002d111c74dfffa39582a67d6af89b9abf21c#diff-eeea910564f86ae74d641501cfc2459d985b2446fd9115817b0b1f7763d60589> https://developer.apple.com/safari/technology-preview/release-notes/ <https://developer.apple.com/safari/technology-preview/release-notes/>)The feature was shipped in Safari Technology Preview 160, not yet in Safari.* Activation *None expected; Feature already implemented in other browsers.*Debuggability *Same as any other CSS property, font shorthand and its subproperties can be inspected in DevTools.*Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, Chrome OS, Android, and Android WebView)? *Yes*Is this feature fully tested by web-platform-tests <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md> ? *Yes, added new wpt tests in addition to existing.*Flag name *-*Requires code in //chrome? *False*Tracking bug *https://crbug.com/1379236 <https://crbug.com/1379236>*Estimated milestones *No milestones specified*Anticipated spec changes *None expected*Link to entry on the Chrome Platform Status https://chromestatus.com/feature/5990758601981952 -- You received this message because you are subscribed to the Google Groups "blink-dev" group. 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