Le 13/08/2021 à 14:23, Frédéric Wang a écrit :
Interoperability and Compatibility
This feature was implemented by Apple in 2011 before the Blink fork
and is still implemented in WebKit. It has never been implemented in
Firefox.
A HTTPArchive search from March 2020 provided 1903 pages out of
~5millions (i.e. 0.0003806%). I'm adding a user counter to actually
measure when a -webkit-pictograph font is actually resolved to the
corresponding user font setting which may give more accurate/relevant
data.
One motivation is to improve interop with Firefox and spec compliance.
But I'm also trying to refactor our internal font-family
implementation that is inherited from WebKit time and is a bit messy
right now. Original generic names like "serif" or "cursive" have
web-exposed bugs ; the recently implemented "system-ui" too but
behaves inconsistently ; and we have non-standard values like
-webkit-pictograph. Once things are cleaned up, we can consider
implementing new values like font-family: emoji, math, fangsong,
ui-serif, etc without adding more problems...
... however, one can also argue that it's would be better to implement
"font-family: emoji" as a replacement/alias to "font-family:
-webkit-pictograph" before deprecating/removing the latter. Again,
this is possible but mean we would add more web-exposed bugs /
inconsistencies in the meantime.
So I'm not really sure about the best approach. Sending "Intent to
Prototype" for now and waiting for feedback.
/Gecko/: Positive No support for -webkit-pictograph
/WebKit/: No signal
(https://lists.webkit.org/pipermail/webkit-dev/2021-August/031938.html
<https://lists.webkit.org/pipermail/webkit-dev/2021-August/031938.html>)
This has been implemented in WebKit since 2011. In general Apple is
against removing features that could potentially break web compat or
their platform. I asked them to see if they would be happy to add
"font-family: emoji" as an alias for -webkit-pictograph, as they did
for "system-ui". In general about the current font-family
implementation, Myles C. Maxfield commented in the github PR to add
WPT tests that he is aware of the issue and doesn't think it's
desirable that these -webkit-* values are web-exposed.
/Web developers/: No signals "font-family: emoji" was added in the CSS
fonts spec, so I guess there is interest to make this more standard. I
was not able to find the github discussion, though.
So just to follow-up here too,
HTTPArchive result from March 2020 from Yoav were:
* -webkit-pictograph alone represented less than 0.04% of pages.
* -webkit-pictograph + -webkit-body + -webkit-standard represented less
than 0.1426%
That sounded big, so I had started to prepare a use counter that would
provide finer measurement (i.e. only measure when the font family
setting is actually resolved for -webkit-pictograph) :
https://chromium-review.googlesource.com/c/chromium/src/+/2124260
New results from August 2021 provided by Yoav and Dominik showed that
together -webkit-pictograph + -webkit-body + -webkit-standard represent
less than 0.004% of HTTPArchive pages so it's an order of magnitude smaller.
Reference doc:
https://docs.google.com/document/d/1nYJzL-MWQrTmf9Z-KscTWuM_5n6-IVdJeEllJ3Appro
--
Frédéric Wang
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