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Svelte 5.57.1

Release Date: September 18, 2026

Svelte 5.57.1 is here. Released September 18, 2026.

What Changed

Patched a runtime issue in runes processing
Fixed edge cases in component prop reactivity
Tightened the error messaging for invalid bindings

Level of Risk

Patch-level. No breaking changes, no new public API. A drop-in update for teams on the 5.57 line.

Action

Bump the version in your package.json and rerun the build. If you were hitting the runes edge case, test your reactive blocks again after upgrading.

Other Versions

5.57.0

5.56.10

5.56.9

5.56.8

5.56.7

5.56.6

5.56.5

5.56.4