React Tutorial #20: Next.js Server Components and SSR
In the previous tutorial, you set up Next.js 15. Now let’s understand the most important concept: React Server Components. The Two Worlds In Next.js App Router, every component is either a Server Component or a Client Component. Server Component (default): Runs on the server — never in the browser Can directly fetch from databases, read files, use secrets No dedicated JavaScript bundle sent to the client for this component Cannot use state, effects, or browser APIs Client Component: ...