[webkit-dev] (no subject)
brendan at mozilla.org
Sun Apr 29 15:30:39 PDT 2012
Maciej Stachowiak wrote:
> On Apr 29, 2012, at 1:25 PM, Ryosuke Niwa<rniwa at 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:
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
We have been studying prefix usage in:
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
See in particular:
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
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.
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