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ExplainerNone Specificationhttps://drafts.fxtf.org/css-masking/#positioned-masks Design docshttps://developer.mozilla.org/en-US/docs/Web/CSS/mask Summary CSS mask, and related properties such as mask-image, mask-mode, etc, are used to hide an element (partially or fully) by masking or clipping the image at specific points. This feature unprefixes the -webkit-mask* properties and brings them up to spec. This includes mask-image, mask-mode, mask-repeat, mask-position, mask-clip, mask-origin, mask-size, and mask-composite, as well as the "mask" shorthand. Local mask-image references are supported, serialization now matches the spec, and accepted values now match the spec (for example, "add" instead of "source-over" for mask-composite). Blink componentBlink>CSS <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3ECSS> TAG reviewNone TAG review statusNot applicable Risks Interoperability and Compatibility There is some compatibility risk in adding an unprefixed feature while still supporting the prefixed version. This is minimized as we are following the same pattern Webkit has already shipped. In addition, Firefox supports several of the legacy -webkit- prefixed properties too. *Gecko*: Shipped/Shipping Firefox has nearly 100% pass rate on css-masking WPT tests. *WebKit*: Shipped/Shipping Safari has shipped much of the unprefixing of these properties (https://bugs.webkit.org/show_bug.cgi?id=229082), as well as many implementation improvements, though some interop fixes are still in development. *Web developers*: Strongly positive ( https://github.com/web-platform-tests/interop/issues/148) This is part of interop-2023. *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 Basic debugging support with existing CSS support 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 https://wpt.fyi/results/css/css-masking?label=master&label=experimental&product=chrome&product=firefox&product=safari&aligned&view=interop Flag name on chrome://flagsNone Finch feature nameCSSMaskingInterop Requires code in //chrome?False Tracking bughttps://crbug.com/1418401 Measurementhttps://chromestatus.com/metrics/css/timeline/popularity/772 Estimated milestones Shipping on desktop 120 DevTrial on desktop 120 Shipping on Android 120 DevTrial on Android 120 Shipping on WebView 120 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). None Link to entry on the Chrome Platform Status https://chromestatus.com/feature/5839739127332864 Links to previous Intent discussionsIntent to prototype: https://groups.google.com/a/chromium.org/g/blink-dev/c/C6hENTlF0NM This intent message was generated by Chrome Platform Status <https://chromestatus.com/>. -- 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/CAJgFLLsO8COSdLuHsEaM2TQWzAf6%2B5wJLt0PcR3QEoyyOb4Rhw%40mail.gmail.com.
