[webkit-dev] -khtml- and -apple- CSS prefixes

David Hyatt hyatt at apple.com
Fri Mar 1 09:11:40 PST 2013

I agree with you that this would be pretty terrible. We definitely don't want developers doing that.


On Feb 28, 2013, at 8:02 PM, Adam Barth <abarth at webkit.org> wrote:

> I noticed this comment on the Hacker News thread about Paul Irish's
> recent blog post:
> ---8<---
> "CSS parsing is the same, though. Slurping up your CSS and turning it
> into CSSOM’s pretty standard. Yeah, though Chrome accepts just the
> -webkit- prefix whereas Apple and other ports accept legacy prefixes
> like -khtml- and -apple-."
> Using this information, can you target Chrome with the webkit- prefix
> and Safari with the apple- prefix? Specifying the apple- prefix after
> webkit- will ensure that Safari uses that one, right?
> --->8---
> http://news.ycombinator.com/item?id=5302150
> If developers start using this technique, it might be harder to remove
> these prefixes in the future.  Chromium's experience removing these
> prefixes has been quite positive.  We ran into one compatibility
> problem on apple.com, which Apple was gracious enough to fix.
> I'd recommend that the rest of the ports disable
> ENABLE(LEGACY_CSS_VENDOR_PREFIXES) to remove support for the -khtml-
> and -apple- CSS prefixes before it's too late.
> Adam
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