I filed bugs[1][2] on other engines, there's explicit support from
Chromium on this[3], and the relevant spec[4] and WPT[5] changes are up
for review, so as soon as they're merged I plan to turn the pref on on
all platforms.
The bug for this is https://bugzilla.mozilla.org/show_bug.cgi?id=1685675
Let me know if there's any concerns with this. Florian in the CSSWG call
raised a potential fingerprinting issue[6], but:
* As discussed in that call that's a more general issue with
autofilling. I think we never autofill without user interaction, too,
which mitigates this.
* It is already observable on Gecko via CSS (because we use the
pseudo-class in the user-agent stylesheet, so you can query it by its
effects like changing the computed values of color / filter).
Cheers,
-- Emilio
[1]: https://bugs.chromium.org/p/chromium/issues/detail?id=1164311
[2]: https://bugs.webkit.org/show_bug.cgi?id=220459
[3]: https://github.com/whatwg/html/issues/6181#issuecomment-735665906
[4]: https://github.com/whatwg/html/pull/6273
[5]: https://github.com/web-platform-tests/wpt/pull/27098
[6]: https://github.com/w3c/csswg-drafts/issues/5775#issuecomment-755793947
On 12/10/20 3:20 AM, Emilio Cobos Álvarez wrote:
Summary:
I plan to prototype a standard :autofill pseudo-class, for two reasons
* We have an internal :-moz-autofill pseudo-class, and webkit-based
browsers have a publicly-exposed :-webkit-autofill counter-part.
* We have a fair amount of compat reports of people forgetting
:-webkit-autofill is not standard and making unrelated CSS not apply to
Firefox.
Thus, I think it'd be nice to have an unprefixed pseudo-class authors
can use, and parse the :-webkit- prefix (unfortunately) for compat.
Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1475316
Standards: https://github.com/whatwg/html/issues/6181 and
https://github.com/w3c/csswg-drafts/issues/5775 for the relevant spec
discussion where I hope to get consensus.
Pref: layout.css.autofill.enabled.
Devtools Bug: I don't think devtools needs particular support. We could
add an :autofill checkbox to the pseudo-classes submenu, please file and
ni? me if you think it'd be useful.
Other browsers: Both WebKit and Blink ship for a long time prefixed
(:-webkit-autofill)
web-platform-tests: I'll add parsing tests once the spec discussion is
done. We can't do much more because actual autofill behavior is not
particularly standard.
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