Contact emailsfuth...@chromium.org
Specificationhttps://drafts.csswg.org/css-contain-3/#container-rule
Summary
@container selectors that contain unsupported queries will never select any
containers, meaning they will never match. That means this query will never
match any container even if there is a size container that will match the
width query that would otherwise make the selector match in cases like
this: @container (width > 0px) or (unknown) {} This is a recent change to
the specification to avoid forward-compatibility issues.
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
Compatibiilty risk low as use counter shows a very low instance of
unsupported container queries used in Chrome (0.000003%):
https://chromestatus.com/metrics/feature/timeline/popularity/4596 There is
a much larger risk in not shipping this spec change (which motivated the
spec change: https://github.com/w3c/csswg-drafts/issues/7551)
*Gecko*: No signal
Reported Gecko bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1874687
*WebKit*: No signal
Reported WebKit bug: https://bugs.webkit.org/show_bug.cgi?id=267535
*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
None
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/css/css-contain/container-queries/container-selection-unknown-features.html
https://wpt.fyi/css/css-contain/container-queries/query-evaluation.html
https://wpt.fyi/css/css-contain/container-queries/query-evaluation-style.html
Flag name on chrome://flags#enable-experimental-web-platform-features
Finch feature nameCSSUnknownContainerQueriesNoSelection
Requires code in //chrome?False
Estimated milestones
Shipping on desktop 122
DevTrial on desktop 122
Shipping on Android 122
DevTrial on Android 122
Shipping on WebView 122
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/5105423604776960
This intent message was generated by Chrome Platform Status
<https://chromestatus.com/>.
--
Rune Lillesveen
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