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How Partial Prerendering works in Next.js 16 with Cache Components, from detecting dynamic access in the prerender to the postponed state and the resume render, and how to design pages for it.
When and how a Next.js 16 page renders on every request, what the server does for that request, and how per-request rendering differs with and without Cache Components.
How Server Components fetch data in Next.js 16, why params, searchParams, cookies() and headers() are promises, how fetch is deduplicated per request, how loading.tsx and Suspense stream the page, and how to avoid waterfalls and hand promises to Client Components with use().
A complete, copy-pasteable TanStack Query v5 setup for the Next.js 16.4.3 App Router - per-request clients, server prefetch with streamed pending queries, HydrationBoundary, useSuspenseQuery, mutations that invalidate both caches, Cache Components, and the pitfalls.