(Apparently I missed sending the intent to prototype, whoops)
As of real soon (as soon as the patch is r+'d), I intend to turn our
container query implementation on by default on all platforms. It's been
enabled on Nightly for a long while already, and fuzzed as well.
It has been developed behind the layout.css.container-queries.enabled
preference and other browsers ship a similar subset of the spec (which
is fairly stable).
Bug: <https://bugzil.la/1744221>
Bug to turn on by default: <https://bugzil.la/1809720>
Summary:
https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Container_Queries
Specification: <https://drafts.csswg.org/css-contain-3/#container-queries>
Standards Body: CSSWG (W3C)
Platform coverage: All
Preference: layout.css.container-queries.enabled
DevTools bug: <https://bugzil.la/1774620> and related.
Other browsers:
* Chromium: Shipped since M106
* Safari: Shipped since Safari 16
web-platform-tests:
https://wpt.fyi/results/css/css-contain?label=master&label=experimental&aligned&view=subtest&q=container-queries
Note that there are tests for style() queries that aren't part of this
etc, but in general I think we're in good shape.
A few of our failures wrt Shadow DOM are known, and our current behavior
seems preferable (IMO) and not likely to run into interop issues. It's
not hard to fix if we find them tho. See all the discussion in
<https://github.com/w3c/csswg-drafts/issues/7947> and
<https://github.com/w3c/csswg-drafts/issues/5984>.
Let me know if there's any concern.
-- Emilio
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