svelte@5.55.3

sveltejs/sveltesvelte@5.55.3Apr 10, 2026by github-actions[bot]

AI Summary

Patch release focusing on HMR updates, derived freezing, error boundary rendering, and eliminating false positives for reactivity loss warnings.

Key Highlights

Fix HMR updates for dynamic components
Freeze deriveds once their containing effects are destroyed
Fix error boundary rendering in forks
Avoid false positives for reactivity loss warning

Full Release Notes

### Patch Changes

-   fix: ensure proper HMR updates for dynamic components ([#18079](https://github.com/sveltejs/svelte/pull/18079))

-   fix: correctly calculate `@const` blockers ([#18039](https://github.com/sveltejs/svelte/pull/18039))

-   fix: freeze deriveds once their containing effects are destroyed ([#17921](https://github.com/sveltejs/svelte/pull/17921))

-   fix: defer error boundary rendering in forks ([#18076](https://github.com/sveltejs/svelte/pull/18076))

-   fix: avoid false positives for reactivity loss warning ([#18088](https://github.com/sveltejs/svelte/pull/18088))