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svelte@5.51.1

sveltejs/sveltesvelte@5.51.1Feb 14, 2026by github-actions[bot]

AI Summary

A stability patch that prevents crashes related to undefined `document.contentType` and improves event delegation encapsulation by using symbols to prevent namespace pollution.

Key Highlights

  • Don't crash on undefined `document.contentType`
  • Use symbols for encapsulated event delegation

Full Release Notes

### Patch Changes

-   fix: don't crash on undefined `document.contentType` ([#17707](https://github.com/sveltejs/svelte/pull/17707))

-   fix: use symbols for encapsulated event delegation ([#17703](https://github.com/sveltejs/svelte/pull/17703))