Svelte 5: Transitions cause errors when the state changes frequently

[Serator]

Describe the bug

If you change state quickly, Svelte transitions start throwing warnings and errors.

Probably related to this change.

iShot_2024-08-28_00.01.06.mp4

Reproduction

Link

Logs

No response

System Info

Svelte 5.0.0-next.240

Severity

annoyance

[trueadm]

This is happening because we're dividing by 0 in several places which is giving us NaN. We can either guard against NaN and default to 0 or we can come up with an alternative approach.

[Rich-Harris]

We can probably just skip creating the second animation if delta === 0