Hi,
As of Firefox 161, I intend to turn on making the `prefers-color-scheme`
media query reflect the color scheme a page declares via `<meta
name="color-scheme">`.
When printing, the declared scheme is only honored with the `only`
keyword, otherwise printing keeps matching `light`, as it does today.
This came up as part of discussions about the web preferences API, see:
https://github.com/w3c/csswg-drafts/issues/14493#issuecomment-6382548874
Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=2085572
Spec: https://drafts.csswg.org/mediaqueries-5/#prefers-color-scheme,
https://drafts.csswg.org/css-color-adjust-1/#page-color-scheme
Standards Body: CSSWG.
Platform Coverage: All
Preference: layout.css.prefers-color-scheme.meta-tag.enabled
DevTools Bug: Color scheme simulation is overridden by the metatag
(right now it emulates the user choice). If we want to change that that
would need a bug, but I think it's fine.
Extensions Bug: N/A
Use Counter: N/A
Standards-Positions Discussion: N/A (minor spec resolution)
Other Browsers:
* Blink: Not implemented yet
* WebKit: Not implemented yet
web-platform-tests: Added a bunch in
https://wpt.fyi/results/css/css-color-adjust/rendering/dark-color-scheme?q=prefers-color-scheme-meta
Cheers,
-- Emilio
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