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RE: [css3-animations] Interaction of animation-fill-mode with running/completed animations

From: Sylvain Galineau <sylvaing@microsoft.com>
Date: Wed, 21 Mar 2012 00:08:17 +0000
To: "L. David Baron" <dbaron@dbaron.org>
CC: "www-style@w3.org" <www-style@w3.org>
Message-ID: <3C4041FF83E1E04A986B6DC50F01782907B3766C@TK5EX14MBXC295.redmond.corp.microsoft.com>

[L. David Baron:]
> 
> On Friday 2012-03-16 21:49 +0000, Sylvain Galineau wrote:
> > The current draft [1] does not say; I assume a. is covered by the
> snapshot clause [2]:
> >
> > # The values used for the keyframes and animation properties are
> > snapshotted at # the time the animation starts. Changing them during
> > the execution of the animation # has no effect.
> 
> But see:
> http://lists.w3.org/Archives/Public/www-style/2011Apr/0079.html

> http://lists.w3.org/Archives/Public/www-style/2011Apr/0352.html

> http://lists.w3.org/Archives/Public/www-style/2011Nov/0133.html

> where I disagree with this "snapshot" bit and:
> http://lists.w3.org/Archives/Public/www-style/2011Dec/0021.html

> where √ėyvind Stenhaug replies on the other side.
> 
> The biggest reason that I don't like the snapshot idea is that exposes
> which changes are considered simultaneous, which is a concept I'd rather
> expose as little as possible since making the Web depend on it reduces
> future opportunities for optimization.
> Honoring dynamic changes means we'll reliably honor changes that are made
> right after the change that starts the animation.
> 

Thanks, I've added these links to bug 14713. 

I don't yet have an opinion but it seems a pretty fundamental decision
we need to make.

[1] https://www.w3.org/Bugs/Public/show_bug.cgi?id=14713

Received on Wednesday, 21 March 2012 00:08:52 GMT

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