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svelte@5.55.5

sveltejs/sveltesvelte@5.55.5Apr 23, 2026by github-actions[bot]

AI Summary

Small patch release addressing derived marking logic and intro event dispatching to ensure correct reactivity and animation behavior.

Key Highlights

  • Fix deriveds being marked while an effect is updating
  • Do not dispatch `introstart` event with animation of animate directive
  • Fix stale promise rejection behavior

Full Release Notes

### Patch Changes

-   fix: don't mark deriveds while an effect is updating ([#18124](https://github.com/sveltejs/svelte/pull/18124))

-   fix: do not dispatch introstart event with animation of animate directive ([#18122](https://github.com/sveltejs/svelte/pull/18122))