W3C home > Mailing lists > Public > www-style@w3.org > January 2012

Re: [css3-animations] :animating or :transitioning pseudo-class

From: Brad Kemper <brad.kemper@gmail.com>
Date: Wed, 18 Jan 2012 18:01:21 -0800
Message-Id: <44DBDA22-21F7-4CAC-8B72-C71C692AFA19@gmail.com>
Cc: Jonathan Snook <jonathan@snook.ca>, "www-style@w3.org" <www-style@w3.org>
To: "Tab Atkins Jr." <jackalmage@gmail.com>
On Jan 18, 2012, at 10:30 AM, "Tab Atkins Jr." <jackalmage@gmail.com> wrote:

> On Tue, Jan 17, 2012 at 6:09 PM, Jonathan Snook <jonathan@snook.ca> wrote:
>>> I'm concerned that a simple :transitioning pseudo wouldn't be enough -
>>> it would trigger on *every* transition, but I suspect that decent uses
>>> of it would actually want to trigger only on *certain* transitions.
>>> Thus, I'd need to see some decent cases that would be helped by
>>> something like this before I can really evaluate its usefulness.
>> To address the fact that it triggers on every transition, an alternative syntax could allow for narrowing down the focus:
>> div:transitioning(opacity) { }
> Yes, that was my first thought as well.  I have no idea how useful it
> is without use-cases, though.
>> As to the two use cases I presented, you did present alternate options that would be just as sufficient in solving those problems. Seeing step-end for arbitrary values would be very helpful.
>> I feel like there are other potential use cases but I'm not thinking of anything practical right now.
> If you come up with some, let us know!  We *usually* only want to add
> features when they give you an ability that is currently impossible,
> or at least very confusing or unintuitive.

How about this:

Received on Thursday, 19 January 2012 02:01:57 UTC

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