What’s new in Svelte: April 2025

[NewsBot]

A new Svelte blog post/announcement has been posted!

With a couple minor releases of SvelteKit in the last month and a few more from Svelte itself, there’s a lot to be excited about this month. From new helper functions to new configuration options, we’ve got a lot to cover...

So let’s dive in!

What’s new in Svelte

• The new idPrefix option for render makes client-side ID generation more reliable in the rare cases that multiple Svelte runtimes exist on a page (5.22.0, Docs, #15428)
• State created in deriveds/effects can now be written/read locally without self-invalidation - reducing the number of “unsafe read”s significantly (5.24.0, https://svelte.dev/blog/whats-new-in-svelte-april-2025