[web-animations-1] Define 'start time' for animation effects #9219
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I was pretty opposed to introducing two kinds of start times but I notice we already have a concept of animation effect end time so I guess this makes sense. |
birtles
reviewed
Aug 23, 2023
| <code><var>timeline time</var> | ||
| − (<var>limit</var> / <a>playback rate</a>)</code> | ||
| where |timeline time| is the current [=time value=] | ||
| of the associated [=timeline=]. | ||
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| 1. If there is a [=pending pause task=] | ||
| and [=start time=] is [=unresolved|resolved=], | ||
| and [=animation/ time=] is [=unresolved|resolved=], |
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| The <dfn for="animation effect">start time</dfn> of an [=animation effect=] | ||
| is the [=animation/start time=] of its [=associated animation=]. |
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Should we define this as zero local time and say that this happens to correspond to the start time of the associated animation effect? That's how we describe the endTime API member.
I noticed we already have a definition of animation effect start time in Web Animations level 2: https://drafts.csswg.org/web-animations-2/#animation-effect-start-time
I think what we have here is compatible with that?
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See #8985 (comment)
In Level 2, we can change just the definition of "start time" to handle sequencing, and those adjustments will flow through the rest of the definitions appropriately.