- From: Brian Birtles <bbirtles@mozilla.com>
- Date: Tue, 8 Mar 2016 14:00:55 +0900
- To: www-style list <www-style@w3.org>
- Cc: "Tab Atkins Jr." <jackalmage@gmail.com>, "L. David Baron" <dbaron@dbaron.org>, Rachel Nabors <rachelnabors@gmail.com>, "public-fx@w3.org" <public-fx@w3.org>
On 2012/12/21 3:46, Tab Atkins Jr. wrote: > On Wed, Dec 19, 2012 at 6:40 PM, L. David Baron <dbaron@dbaron.org> wrote: >> On Wednesday 2012-12-19 10:29 -0800, Tab Atkins Jr. wrote: >>> I propose another steps value: step-mid. It splits the animation curve >>> into n segments, makes the first n-1 do step-end behavior, and leaves >>> the last to just run normally. The above example could instead be >>> written as "steps(4, step-mid)" and have this behavior: >> >> I like the idea, but I find the name confusing; it sounded like >> something that would give the first and last steps half the duration >> of the other steps. (I also find the description quoted above >> confusing, but the rest of the email made it clear.) > > I have absolutely no attachment to the name. It was the first thing > that came to mind. > > I assume that Rachel's suggestion comes from her association of > steps(n, end) with meaning "eat the end of the animation" (and > likewise for "start"), so "none" is reasonable in that sense. I'm not > sure it makes sense if your understanding comes from the spec's > explanation, though, where "end" means "transitions all at once at the > end of the step". > > Another possibility is just a new function. I'm not sure what I'd > want to name it, though. I spoke with Rachel and a few others about this recently and we were wondering about the name step-equal? Unfortunately, that doesn't translate into a function very well ('step-equal(2)'? Alternatively, what about 'step-stagger' and 'stagger(5)', or just the function?). I'd like to settle on this soon because Chrome is shipping Element.animate() with support for 'step-middle' as defined by Web Animations.[1] We went to implement this in Firefox[2] but I'm concerned that there aren't use cases for step-middle as currently specced and instead what we want is what Tab originally proposed in this thread. Assuming usage is low in Chrome, I'd like to drop step-middle from Web Animations and replace it with this revised timing function. Best regards, Brian [1] http://w3c.github.io/web-animations/#typedef-step-timing-function I didn't realize Chrome had implemented this, or else I would have brought this up sooner. [2] https://bugzilla.mozilla.org/show_bug.cgi?id=1248340
Received on Tuesday, 8 March 2016 05:01:24 UTC