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svelte@5.54.0

sveltejs/sveltesvelte@5.54.0Mar 17, 2026by github-actions[bot]

AI Summary

A minor release allowing compiler options to be dynamically defined as functions.

Key Highlights

  • Reinstate reactivity loss tracking

New Features

  • Allow `css`, `runes`, and `customElement` compiler options to be functions

Full Release Notes

### Minor Changes

-   feat: allow `css`, `runes`, `customElement` compiler options to be functions ([#17951](https://github.com/sveltejs/svelte/pull/17951))

### Patch Changes

-   fix: reinstate reactivity loss tracking ([#17801](https://github.com/sveltejs/svelte/pull/17801))