W3C home > Mailing lists > Public > www-style@w3.org > December 2013

Re: [css-background] Animating border-position

From: Tab Atkins Jr. <jackalmage@gmail.com>
Date: Tue, 17 Dec 2013 18:23:29 -0800
Message-ID: <CAAWBYDBbbLoiaXjduD=P6G0WUs7hPM8ePUjPJfRSftpb8KXuww@mail.gmail.com>
To: fantasai <fantasai.lists@inkedblade.net>
Cc: www-style list <www-style@w3.org>
On Tue, Dec 17, 2013 at 5:43 PM, Tab Atkins Jr. <jackalmage@gmail.com> wrote:
> On Tue, Dec 17, 2013 at 4:21 PM, fantasai <fantasai.lists@inkedblade.net> wrote:
>> On 12/17/2013 03:32 PM, Tab Atkins Jr. wrote:
>>> However, as established by FF, we can at least convert values on
>>> opposite sides of the same axis into each other, if we establish that
>>> <percentage> can be preserved as a top-level type in a calc() in some
>>> cases, which we should do.  (I'm fiddling with V&U right now to allow
>>> it.  It's tricky to spec.)
>>
>> I'm confused as to why you think V&U needs changes.
>
> Because right now calc() specifies that a <percentage> resolves into a
> <length> (or whatever), but for <position> to work right, we need to
> preserve its percentage-ness.

Never mind, turns out we'd already added a paragraph that specifies
this.  I just added a clarifying example to make sure it stands out,
using background-position directly.

We just need to adjust how <position> is transitioned, and can
probably go do that in the Transitions spec.

~TJ
Received on Wednesday, 18 December 2013 02:24:17 UTC

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