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How do you handle authentication in Next.js?

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01

Understand the problem

Sessions/JWT with middleware and Server Components.

nextjsauthenticationmiddlewareauth
02

Attempt it yourself

Sketch your approach before reading the solution — that's what interviews test.

Nudge consolestandby

Stuck? Beam a request up — the console returns a conceptual nudge that guides your logic without spoiling the implementation.

03

Study the solution

Authenticate (credentials/OAuth via NextAuth/Auth.js or your own), store a session in an HttpOnly cookie or JWT, gate routes in middleware for fast redirects, and verify the session in Server Components/Server Actions before data access. Never rely on client-only checks.

Solution ready — 2 min read

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04

Read the code

Server-side session check in a page
import { auth } from '@/lib/auth';       // Auth.js
import { redirect } from 'next/navigation';

export default async function Dashboard() {
  const session = await auth();               // verify on the server
  if (!session) redirect('/login');           // real gate (not just middleware)
  const data = await getUserData(session.user.id);
  return <Panel data={data} />;
}
05

Join the discussion

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