Just to follow up on the position request. A position request was filed as part of the original user preference client hint implementation and neither have had a response.
Mozilla Position request https://github.com/mozilla/standards-positions/issues/526 WebKit Position request https://github.com/WebKit/standards-positions/issues/15 On Monday, 24 July 2023 at 19:36:18 UTC+1 Luke wrote: > > Have we asked for signals? > > I haven't filed position requests yet. I will do before submitting an > intent to ship however. > > > If Google Search is asking for this, it seems like we have some signal, > no? > > To clarify Google Search aren't asking for this client hint specifically. > But they were a use case for the color scheme preference client hint. The > Motivation section was largely a copy from previous preference client hints > as a general explanation for the system. This feature is mainly just for > completeness of the `prefers-reduced-transparency` implementation. > > Some of the other sections I hadn't filled out on the chromestatus page > apologies. I have addressed your specific questions below and will update > the status page. > > > Debuggability > > Developers can change this client hint header value by emulating > prefers-reduced-transparency via Devtools in the Rendering Panel. > > > Web Platform Tests > > This feature will be tested as much as possible in WPT tests. > > > FInch Feature > > My understanding of the exact feature mechanics is a bit lacking here. But > a kClientHintsPrefersReducedTransparency feature has been added to > blink/public/common/features.h I believe this is togglable via finch? (It's > disabled by default for now) > > On Monday, 24 July 2023 at 19:23:06 UTC+1 [email protected] wrote: > > > On 7/20/23 8:19 AM, Luke wrote: > > Contact emails [email protected], [email protected] > > Explainer > https://github.com/wicg/user-preference-media-features-headers/blob/main/README.md > > Specification > https://wicg.github.io/user-preference-media-features-headers/#sec-ch-prefers-reduced-transparency > > Summary > > User Preference Media Features Client Hints Header defines a set of HTTP > Client Hints headers around user preference media features as defined by > Media Queries Level 5. If used as Critical Client Hints, these headers > allow servers to make smart choices regarding, e.g., CSS inlining. > Sec-CH-Prefers-Reduced-Transparency reflects the user's > prefers-reduced-transparency preference. > > > Blink component Blink>CSS > <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3ECSS> > > Motivation > > CSS media queries, and specifically user preference media features like > `prefers-reduced-transparent` or `prefers-reduced-motion`, have a > potentially significant impact on the amount of CSS that needs to be > delivered by a page, and on the experience the user is going to have when > the page loads. Focusing on `prefers-color-scheme`—but highlighting that > the reasoning applies to other user preference media features as well—it is > a best practice to not load CSS for the particular non-matching color > scheme in the critical rendering path, and instead to initially only load > the currently relevant CSS. One way of doing so is via `<link media>`. > However, high-traffic sites like Google Search that wish to honor user > preference media features like `prefers-color-scheme` and that inline CSS > for performance reasons, need to know about the preferred color scheme (or > other user preference media features respectively) ideally at request time, > so that the initial HTML payload already has the right CSS inlined. > > > Initial public proposal https://github.com/w3c/csswg-drafts/issues/4162 > > Search tags client hints > <https://chromestatus.com/features#tags:client%20hints>, > sec-ch-prefers-reduced-transparency > <https://chromestatus.com/features#tags:sec-ch-prefers-reduced-transparency> > , prefers-reduced-transparency > <https://chromestatus.com/features#tags:prefers-reduced-transparency> > > TAG review > > TAG review status Pending > > Risks > > > Interoperability and Compatibility > > *Gecko*: No signal > > *WebKit*: No signal > > Have we asked for signals? > > > *Web developers*: No signals > > If Google Search is asking for this, it seems like we have some signal, no? > > > > > *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? > > > Debuggability > > Anything to note here? > > > > Is this feature fully tested byﾠweb-platform-tests > <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md> > ? No > > Why not? > > > Flag name on chrome://flags > > Finch feature name > > Presumably we have a base::Feature, non? > > > > Non-finch justification None > > Requires code in //chrome? False > > Tracking bug https://bugs.chromium.org/p/chromium/issues/detail?id=1466423 > > Estimated milestones > > No milestones specified > > > Link to entry on the Chrome Platform Status > https://chromestatus.com/feature/6242983812268032 > > Links to previous Intent discussions > > This intent message was generated byﾠChrome 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 [email protected]. > To view this discussion on the web visit > https://groups.google.com/a/chromium.org/d/msgid/blink-dev/B1ED49A6-31BF-4D28-89B3-D2973F9F12DA%40gmail.com > > <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/B1ED49A6-31BF-4D28-89B3-D2973F9F12DA%40gmail.com?utm_medium=email&utm_source=footer> > . > > -- You received this message because you are subscribed to the Google Groups "blink-dev" group. 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