Re: [csswg-drafts] [css-animations-2][web-animation-2] Rename exit range to active range (#13174)

Pairing enter with active seems like a weird combo. It also might add confusion to enter range (from triggers) and entry range (from view timelines) – something we are trying to prevent here with this rename.

Anecdotally, last week during a call with our GDEs, I did a quick introduction to Scroll-Triggered Animations. During the 2 minute intro I used the terminology “activation range” and “active range” (because that’s when the trigger becomes active, and later inactive) and I must say they immediately got it. I’d like to believe that this confirms that activation and active are the correct names.

Also see this visualizer (in Chrome Canary with flags) that shows the ranges + also shows whether the trigger is active or not active: https://codepen.io/bramus/full/bNpzXrV. The terminology use for all parts nicely fits together.



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Received on Tuesday, 16 December 2025 16:18:45 UTC