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Next.js

Overview​

Next.js is a React framework from Vercel for production web apps. It supports server components, file-system routing, API routes, image optimization, and flexible rendering modes (SSR, SSG, ISR) in one codebase.

Key concepts​

  • App Router vs Pages Router — app/ directory (React Server Components) vs legacy pages/.
  • Data fetching — fetch caching controls, server actions, loaders.
  • Rendering — Static, dynamic, streaming, edge runtimes.
  • Deployment — Vercel, Docker, or any Node host.
  • Built-ins — next/image, next/font, middleware.

Sample: App Router page​

// app/page.tsx
export default function Page() {
  return <main>Hello Next.js</main>;
}

References​