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Re: [css3-animation] keyframes and percentages

From: Yves Lafon <ylafon@w3.org>
Date: Tue, 9 Oct 2012 09:03:37 -0400 (EDT)
To: Øyvind Stenhaug <oyvinds@opera.com>
cc: www-style@w3.org
Message-ID: <alpine.DEB.1.10.1210090859030.11339@wnl.j3.bet>
On Tue, 9 Oct 2012, Øyvind Stenhaug wrote:

> On Tue, 09 Oct 2012 13:28:35 +0200, Yves Lafon <ylafon@w3.org> wrote:
>
>> Hi,
>> The spec is a bit silent about that, but is it ok to have negative 
>> percentages or percentages over 100%?
>
> The editor's draft says that "[i]f a keyframe selector specifies negative 
> percentage values or values higher than 100%, then the keyframe will be 
> ignored."

Ah good. Thanks!

>> It is not specified at all, so it should be allowed, and if you have
>> -20% {
>>   top: 10px;
>>   animation-timing-function: ease-out;
>> }
>
> Even with the working draft, this is not valid per the keyframes_blocks 
> grammar.

keyframe_selector: [ FROM_SYM | TO_SYM | PERCENTAGE ] S* [ ',' S* [ FROM_SYM | TO_SYM | PERCENTAGE ] S* ]*;
and PERCENTAGE allows -20%
That said, the new prose is good enough to constraint what's valid or not.

-- 
Baroula que barouleras, au tiéu toujou t'entourneras.

         ~~Yves
Received on Tuesday, 9 October 2012 13:03:46 GMT

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