Maciej Stachowiak wrote:
On Apr 29, 2012, at 1:25 PM, Ryosuke Niwa<rn...@webkit.org> wrote:
I'm actually curious as to how the session participants reached this consensus
(probably on a separate thread). It seems like the bar shouldn't too high for
removing prefixed APIs when they are unprefixed equivalents because I'm certain
web developers want to use the ones that work on all browsers instead of just
on WebKit.
Here's some evidence that Web developers do not always care about this, and
that lack of support for webkit-prefixed properties can be detrimental to Web
compatibility:
http://dev.opera.com/articles/view/opera-mobile-emulator-experimental-webkit-prefix-support/
I agree with this, including the careful "do not always" and "can be
detrimental" words ;-).
This message may not be interesting to webkit-dev. Skip if you are not
interested in prefix usage studies, what Mozilla might do about
prefixes, etc.
We have been studying prefix usage in:
https://bugzilla.mozilla.org/show_bug.cgi?id=708406
The situation for Opera is much worse than for Mozilla for many
properties, e.g. border-radius, where -moz- is often observed to be used
alongside -webkit-.
See in particular:
https://bugzilla.mozilla.org/show_bug.cgi?id=708406#c39
The table's tabs don't lay out nicely in bugzilla. Here's my attempt at
fixing the layout by hand:
base_property num_domains num_rules
pct_no_unprefixed_and_no_moz
animation-count 1 1 100.0
animation-delay 5 137 80.0
animation-direction 8 10 62.5
animation-duration 73 324 87.9
animation-fill-mode 2 3 50.0
animation-iteration-count 51 78 84.7
animation-name 72 756 87.6
animation-play-state 2 3 0.0
animation-timing-function 51 100 94.5
text-size-adjust 779 6352 99.5
transform-origin 68 196 56.9
transform-origin-y 2 3 0.0
transform-style 35 50 100.0
transition-delay 19 53 63.2
transition-duration 208 853 71.5
transition-property 156 491 76.2
transition-timing 1 2 0.0
transition-timing-function 45 111 58.9
Clearly Mozilla feels Opera's pain for certain properties, e.g.
text-size-adjust. Per the bug, 99.5% of 6352 found instances do not have
unprefixed or -moz-prefixed equivalents of text-size-adjust.
Lack of -webkit- prefix support may not be detrimental to a particular
browser's mobile web compatibility where that browser engine's prefix
(or no prefix) is widely used. It depends on the browser and the
particular style property.
So (just FYI) we at Mozilla are not contemplating emulating -webkit-
quite so much as Opera may be. We do want to sort this all out in the
CSS-WG and avoid unnecessary fragmentation.
/be
_______________________________________________
webkit-dev mailing list
webkit-dev@lists.webkit.org
http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev
