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After way too many rounds of review, `hydratable` is out! This new low-level Svelte API isn’t one you’ll find yourself reaching for often, but it’s extremely useful to libraries. During SSR, function results are serialized alongside your HTML…

Elliott Johnson

@ell.iott.dev

During hydration on the client, the results are pulled from the serialized data synchronously, so you don’t have to do your async work again. If used outside of hydration, `hydratable` just runs its callback. This API will power SvelteKit’s remote functions very soon! svelte.dev/docs/svelte/...

svelte.devHydratable data • Svelte DocsHydratable data • Svelte documentation

25/11/25, 2:54 am0 reposts14 likes

Elliott Johnson

@ell.iott.dev

25 Nov 2025

(Update: absolutely no clue what illness ray.so contracted in the initial post 😂)