Contact emails changseok...@bytedance.com, changs...@chromium.org Explainer None
Specification https://www.w3.org/TR/css-fonts-5/#font-size-adjust-prop Summary The font-size-adjust CSS property enhances readability consistency by adjusting font size based on lowercase letter height rather than uppercase. Additionally, the newly introduced two-value syntax for font-size-adjust in the font module level 5 enables web designers to specify a font metric for size adjustment. This feature is one of focus areas for Interop 2024. Blink component Blink>CSS, Blink>Fonts TAG review None TAG review status Not applicable Risks Interoperability and Compatibility Gecko and WebKit have shipped this feature, and there is no major interoperability risk. However, certain aspects are still being discussed regarding interoperability concerns. [1, 2]. [1] https://github.com/w3c/csswg-drafts/issues/6384 [2] https://github.com/w3c/csswg-drafts/issues/10292 *Gecko*: Shipped/Shipping ( https://bugzilla.mozilla.org/show_bug.cgi?id=1711479) *WebKit*: Shipped/Shipping (https://bugs.webkit.org/show_bug.cgi?id=254191) *Web developers*: No signals *Other signals*: WebView application risks Does this intent deprecate or change behavior of existing APIs, such that it has potentially high risk for Android WebView-based applications? None Debuggability N/A Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, ChromeOS, Android, and Android WebView)? Yes. Windows experiences a minor sub-pixel mismatching issue in one wpt test, but it doesn't affect usability. Is this feature fully tested by web-platform-tests <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md> ? Yes https://wpt.fyi/results/css/css-fonts?label=master&label=experimental&aligned&view=interop&q=label%3Ainterop-2024-font-size-adjust Flag name on chrome://flags enable-experimental-web-platform-features Finch feature name CSSFontSizeAdjust Requires code in //chrome? False Tracking bug - https://issues.chromium.org/issues/40081245 - https://issues.chromium.org/issues/40186237 Measurement - https://chromestatus.com/metrics/css/timeline/popularity/465 - https://caniuse.com/font-size-adjust Availability expectation Both the Gecko and WebKit communities have implemented this feature, and corresponding tests are already included in the Web Platform Tests (WPT). Adoption expectation Firefox and WebKit variant browsers have embraced this feature. Adoption plan Blink is shipping this feature. Non-OSS dependencies Does the feature depend on any code or APIs outside the Chromium open source repository and its open-source dependencies to function? None Sample links https://developer.mozilla.org/en-US/docs/Web/CSS/font-size-adjust Estimated milestones Shipping on desktop 127 Shipping on Android 127 Shipping on WebView 127 Anticipated spec changes Open questions about a feature may be a source of future web compat or interop issues. Please list open issues (e.g. links to known github issues in the project for the feature specification) whose resolution may introduce web compat/interop risk (e.g., changing to naming or structure of the API in a non-backward-compatible way). Some concerns related to interoperability are still under discussion. - https://github.com/w3c/csswg-drafts/issues/6384 - https://github.com/w3c/csswg-drafts/issues/10292 Link to entry on the Chrome Platform Status - https://chromestatus.com/feature/5720910061371392 - https://chromestatus.com/feature/5170570175447040 Links to previous Intent discussions - Intent to prototype font-size-adjust: https://groups.google.com/a/chromium.org/g/blink-dev/c/lqd_g6Z6fH4/m/qZyljJmg6oQJ - Intent to prototype the two value syntax: https://groups.google.com/a/chromium.org/g/blink-dev/c/2FufB-ckycw/m/mj1I3iUECAAJ Best, -- You received this message because you are subscribed to the Google Groups "blink-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to blink-dev+unsubscr...@chromium.org. To view this discussion on the web visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/b34b218a-28c4-44e0-9451-3a2fc0949ab3n%40chromium.org.
