If none of the failures are related to this feature, then I have no concerns! :)
On Wed, Oct 28, 2026 at 4:27 PM Javier Fernandez <[email protected]> wrote: > Hi Phillip, > > It's true that there are still some tests failing in the > css-background/parsing folder, mainly related to the 'background-position' > longhand. Those are definitively not going to be fixed by this feature; > it's a different bug related to the "x-start / x-end" and "y-start / y-end" > logical values. > > There are also some failures in the > background-shorthand-serialization.html, which are not related to this > feature either. However, in this case those are going pass once my CL at > https:crrev.com/c/8301652 lands. > > I hope this clarifies your doubts. > > Best, > > -- javi > On 10/28/26 16:09, Philip Jägenstedt wrote: > > LGTM3 assuming the tests will all be passing when this ships. > > On Wed, Oct 28, 2026 at 4:07 PM Philip Jägenstedt <[email protected]> > wrote: > >> Some of the linked tests have failures in Chrome, should those failures >> be fixed or are some of the linked tests not for this feature? >> >> On Wed, Oct 28, 2026 at 3:56 PM Daniel Bratell <[email protected]> >> wrote: >> >>> LGTM2 (Adoption now added) >>> >>> /Daniel >>> On 2026-10-28 06:24, Chris Harrelson wrote: >>> >>> Actually I take that back - I'll add my LGTM once the Adoption gate is >>> filled out in the Chromestatus entry. >>> >>> On Wed, Oct 28, 2026 at 5:23 AM Chris Harrelson <[email protected]> >>> wrote: >>> >>>> LGTM2 >>>> >>>> On Tue, Oct 27, 2026 at 7:08 PM Alex Russell <[email protected]> >>>> wrote: >>>> >>>>> LGTM1; thanks for the note about interop risk, makes this easier to >>>>> approve. >>>>> >>>>> On Monday, October 26, 2026 at 2:56:32 PM UTC-7 Chromestatus wrote: >>>>> >>>>>> *Contact emails* >>>>>> [email protected] >>>>>> >>>>>> *Specification* >>>>>> https://drafts.csswg.org/css-values-4/#linked-properties >>>>>> >>>>>> *Summary* >>>>>> Makes the computed value of the background-* longhands keep the >>>>>> number of comma-separated values the author specified, instead of >>>>>> repeating >>>>>> or truncating it to the background-image layer count. Repeating and >>>>>> truncating are used-value behavior: "The computed values of the >>>>>> coordinating list properties are not affected by such truncation or >>>>>> repetition." This feature would implement the behavior defined in the >>>>>> https://drafts.csswg.org/css-values-4/ Appendix A. >>>>>> >>>>>> *Blink component* >>>>>> Blink>CSS >>>>>> <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3ECSS%22> >>>>>> >>>>>> *Web Feature ID* >>>>>> background <https://webstatus.dev/features/background> >>>>>> >>>>>> *Motivation* >>>>>> The behavior defined in the "Appendix A: Coordinating List-Valued >>>>>> Properties" of the CSS Values And Units L4 specification has been >>>>>> discussed >>>>>> recently and agreed that it should stand. This makes Chrome the only >>>>>> browser diverging in the specified behavior. >>>>>> >>>>>> *Initial public proposal* >>>>>> *No information provided* >>>>>> >>>>>> *TAG review* >>>>>> *No information provided* >>>>>> >>>>>> *TAG review status* >>>>>> Not applicable >>>>>> >>>>>> *Goals for experimentation* >>>>>> None >>>>>> >>>>>> *Risks* >>>>>> >>>>>> >>>>>> *Interoperability and Compatibility* >>>>>> The new behavior this feature provides is implemented already by >>>>>> Firefox and Safari, so it's Chrome catching up in this case; hence, the >>>>>> interop risk is zero. Regarding compatibility, making the background-* >>>>>> properties align "coordinated list group" is what matches the current >>>>>> specified behavior, which the CSSWG agreed on keep. Some engines >>>>>> implemented weird truncation rules, that's why there were some WPT not >>>>>> following the spec. The resolution [1] was to update the tests and >>>>>> observe >>>>>> whether any compat issue appears in the next months. [1] >>>>>> https://github.com/w3c/csswg-drafts/issues/12791#issuecomment-4040285092 >>>>>> >>>>>> *Gecko*: Shipped/Shipping Firefox was the only one implementing the >>>>>> behavior defined in the spec. >>>>>> https://github.com/w3c/csswg-drafts/issues/12791#issuecomment-4040285092 >>>>>> >>>>>> *WebKit*: Shipped/Shipping ( >>>>>> https://developer.apple.com/documentation/safari-technology-preview-release-notes/stp-release-246) >>>>>> See >>>>>> the bug https://bugs.webkit.org/show_bug.cgi?id=315771 for details >>>>>> >>>>>> *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? >>>>>> *No information provided* >>>>>> >>>>>> >>>>>> *Debuggability* >>>>>> *No information provided* >>>>>> >>>>>> *Will this feature be supported on all six Blink platforms (Windows, >>>>>> Mac, Linux, ChromeOS, 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-backgrounds/parsing?label=experimental&label=master&aligned >>>>>> * >>>>>> https://wpt.fyi/results/css/css-backgrounds/animations/background-position-interpolation.html?label=experimental&label=master&aligned >>>>>> * >>>>>> https://wpt.fyi/results/css/css-backgrounds/animations/background-size-interpolation.html?label=experimental&label=master&aligned >>>>>> * >>>>>> https://wpt.fyi/results/css/css-masking/parsing?label=experimental&label=master&aligned >>>>>> >>>>>> *Flag name on about://flags* >>>>>> *No information provided* >>>>>> >>>>>> *Finch feature name* >>>>>> *No information provided* >>>>>> >>>>>> *Non-finch justification* >>>>>> *No information provided* >>>>>> >>>>>> *Rollout plan* >>>>>> Will ship enabled for all users >>>>>> >>>>>> *Requires code in //chrome?* >>>>>> False >>>>>> >>>>>> *Tracking bug* >>>>>> https://issues.chromium.org/issues/40855581 >>>>>> >>>>>> *Estimated milestones* >>>>>> Shipping on desktop 159 >>>>>> Shipping on Android 159 >>>>>> Shipping on WebView 159 >>>>>> Shipping on iOS 159 >>>>>> >>>>>> *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). >>>>>> *No information provided* >>>>>> >>>>>> *Link to entry on the Chrome Platform Status* >>>>>> >>>>>> https://chromestatus.com/feature/5144333908049920?gate=6114123363516416 >>>>>> >>>>>> *Links to previous Intent discussions* >>>>>> Intent to Prototype: >>>>>> https://groups.google.com/a/chromium.org/g/blink-dev/c/eny3Exk0b8w/m/HiXscXadAgAJ >>>>>> >>>>>> >>>>>> 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 [email protected]. >>>>> To view this discussion visit >>>>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/1a9a7278-d5a2-42a7-8556-2086d23e5fa9n%40chromium.org >>>>> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/1a9a7278-d5a2-42a7-8556-2086d23e5fa9n%40chromium.org?utm_medium=email&utm_source=footer> >>>>> . >>>>> >>>> -- >>> 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 visit >>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAOMQ%2Bw9dAoRhzA_%2BfU2Tg%2BSbBvPapj_oxcUnXRkFTy_%2BxUdSWg%40mail.gmail.com >>> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAOMQ%2Bw9dAoRhzA_%2BfU2Tg%2BSbBvPapj_oxcUnXRkFTy_%2BxUdSWg%40mail.gmail.com?utm_medium=email&utm_source=footer> >>> . >>> >>> -- >>> 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 visit >>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/4cff63cc-b182-4a2d-8957-981c94aeafae%40gmail.com >>> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/4cff63cc-b182-4a2d-8957-981c94aeafae%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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