W3C home > Mailing lists > Public > www-style@w3.org > April 2009

Re: PF-Wg feedback on CSS animations

From: Dean Jackson <dino@apple.com>
Date: Sat, 25 Apr 2009 06:03:06 +1000
Cc: www-style@w3.org
Message-Id: <7F9748D6-56A3-43EA-8553-1475443D462D@apple.com>
To: Jonathan Snook <jonathan.snook@gmail.com>

On 24/04/2009, at 1:21 PM, Jonathan Snook wrote:

>> It is possible for an assistive tool to modify the animation  
>> durations for each animation fairly easily. We also have an event  
>> to notify when an animation has started, but by then it is too late  
>> to change the animation (other than to remove it and restart it  
>> with a modified duration, which might be good enough).
> Maybe it's just me but the only event I see documented in that spec  
> is the transitionEnd event. Is a transitionStart (and maybe even  
> transitionStep) a possibility?

We didn't see as much need for a transitionStart event. Can you think  
of places where you need it because the functionality isn't available  
elsewhere? For example, if you are changing property values via JS  
you're already in a better place to set up the transition.

Also, we wanted to make it more likely that pages with transitions  
fall back gracefully on older browsers. Having the ability to process  
an event before a transition makes this less likely.

Received on Friday, 24 April 2009 20:04:19 UTC

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