cookiecrook
commented
11 months ago Although I originally proposed this media feature, I'm not sure what can be done about this for Interop 2024 given that abuse of matchMedia() hasn't been addressed with some of the user preference (prefers-*) media features... And, unlike the users with vestibular impairments clamoring for prefers-reduced-motion, we're not seeing the same amount of user need. Though I acknowledge transparency contributes to reduced readability among low vision users, many are making do with existing features such as font size increase and prefers-contrast.
I'd love to see this media feature ship, but I am concerned about proposing it for Interop 2024 given that there is an open debate about the privacy implication.
Additional context on why this isn't implemented in WebKit yet found in WebKit Position #145 and CSS #8651 (quoting from the latter):
Note on Fingerprinting
[ Several proposed media features, including this one] are subject to changes based on the outcome of https://github.com/WebKit/standards-positions/issues/145 and other related privacy issues. We debated not proposing https://github.com/w3c/csswg-drafts/issues/8651 until after privacy issues with @media/matchMedia() had been resolved, but decided to propose it here anyway to further the discussion.
lukewarlow
Description
Following on from Interop 2023s Media Queries 4 focus area, it would be good for some of Media Queries 5 to be focussed on next. This request is specifically for the prefers-reduced-transparency media query, this has shipped in Chromium recently.
Specification
https://drafts.csswg.org/mediaqueries-5/#prefers-reduced-transparency
Open Issues
No response
Tests
https://wpt.fyi/results/css/mediaqueries/prefers-reduced-transparency.html
Current Implementations
Standards Positions
WebKit: https://github.com/WebKit/standards-positions/issues/145
Gecko: https://github.com/mozilla/standards-positions/issues/851
Gecko Intent to Prototype: https://groups.google.com/a/mozilla.org/g/dev-platform/c/l410J8odZjA/m/JdWVMNtSAQAJ
Browser bug reports
No response
Developer discussions
No response
Polls & Surveys
No response
Existing Usage
No response
Workarounds
No response
Accessibility Impact
This will help sites to honour user preferences for reduced transparency.
Privacy Impact
This exposes a new fingerprinting bit (like all user preference media queries)
Other
There's a PR to webkit that implements this, and Firefox has an implementation behind a flag.