To be particular about the usage number, it's about a magnitude more
than our informal limit. That doesn't mean it can't be shipped, but it
means that we want to be fairly certain that >90% of the users are
unaffected by the change.
How should I interpret the results from your investigation? That none of
the 8 investigated sites would be negatively affected?
/Daniel
On 2024-05-22 18:03, Vladimir Levin wrote:
On Tue, May 21, 2024 at 2:20 PM Joey Arhar <[email protected]> wrote:
> Do you know what the breakage looks like
I pushed to make sure that using the old syntax with
CustomStateSet.add() wouldn't throw exceptions when in the new
mode in order to reduce breakage. When websites use the old syntax
after it's removed, they will just have styling differences
because their selectors won't parse anymore.
> or whether this usage is limited to a library/a small set of
large websites or something else?
Based on the analysis that I linked in the previous thread
<https://docs.google.com/document/d/1BHoO12ts0E-NQQH9AMwR2sKAIV0OPB-FA_8QXMpolz0/edit>,
there are some websites which all look very similar which use it,
but they are all hidden behind display:none elements that I had to
manually reveal. There was only one website I found which was
actually using it which has a carousel which has buttons that
didn't work in safari and firefox because CustomStateSet didn't
exist yet.
I don't think there is a popular library which is using the
deprecated syntax.
> Ideally, this is feature detected with some fallback syntax
Websites just have to replace ":--foo" with ":state(foo)", I don't
think any feature detection is necessary. If they are interested
in supporting older browsers, then I don't see why they would have
any interest in looking at whether the deprecated syntax works or
not because the other browsers didn't have it before and neither
did we until a couple years ago.
I meant I hope that existing use is either feature-detected or it's
using both properties. In either case, it's very easy to fix if
problems arise since alternate syntax is shipped already in multiple
browsers.
LGTM1
On Tue, May 21, 2024 at 11:09 AM Vladimir Levin
<[email protected]> wrote:
Hey,
0.04% seems like a fairly sizable number. Do you know what the
breakage looks like or whether this usage is limited to a
library/a small set of large websites or something else?
Ideally, this is feature detected with some fallback syntax
On Tue, May 21, 2024 at 1:39 PM Joey Arhar
<[email protected]> wrote:
Contact emails
[email protected]
Explainer
None
Specification
https://github.com/whatwg/html/pull/8467
Summary
The CSS custom state pseudo-class is being renamed
from :--foo to :state(foo). The new syntax,
:state(foo), has been enabled by default, and now
we have to deprecate and remove the :--foo syntax.
Gecko and webkit never implemented the old syntax
and they have both shipped the new syntax. We are
currently shipping both the new syntax and the old
syntax at the same time. There have been console
errors and DevTools deprecations for the old
syntax for many milestones already. Previous
thread on this topic:
https://groups.google.com/a/chromium.org/g/blink-dev/c/JvpHoUfhJYE/m/uRtWiqoHAQAJ
The UseCounter is currently at 0.04%
https://chromestatus.com/metrics/feature/timeline/popularity/3796
Blink component
Blink>HTML>CustomElements
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EHTML%3ECustomElements>
Motivation
The syntax of this feature needs to change in
order to get support from the other browsers and
eventually have interoperable behavior.
Initial public proposal
None
TAG review
None
TAG review status
Not applicable
Risks
Interoperability and Compatibility
Websites which are currently using the old syntax
and don't migrate to the new syntax will have CSS
selectors which become invalid which would impact
the styling of their custom elements.
/Gecko/: Positive Firefox has shipped the new syntax
/WebKit/: Positive
(https://github.com/whatwg/html/pull/8467#issuecomment-1381645661)
Safari has shipped the new syntax
/Web developers/: No signals
/Other signals/:
Activation
Switching to the new syntax is easy.
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
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/results/custom-elements/state
Flag name on chrome://flags
None
Finch feature name
CSSCustomStateDeprecatedSyntax
Requires code in //chrome?
False
Tracking bug
https://issues.chromium.org/issues/41486953
Estimated milestones
No milestones specified
Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5140610730426368?gate=4940354997714944
Links to previous Intent discussions
https://groups.google.com/a/chromium.org/g/blink-dev/c/JvpHoUfhJYE/m/uRtWiqoHAQAJ
This intent message was generated by Chrome
Platform Status <https://chromestatus.com/>.
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