SSR and Hydration
Choose rendering mode based on your UX and performance goals.
Updated: 2026-02-23
Hydration modes
Use full for interactive apps, islands for partial hydration, none for content-first static-like pages.
src/app.tsx
defineCounterSite({
pages,
layout,
hydrateMode: 'islands',
});Streaming
Server helpers can stream HTML chunks to improve time-to-first-byte and progressively flush response.