How can I implement JWT authentication in a Next.js app?

How can I implement JWT authentication in a Next.js app?

To implement JWT authentication in a Next.js app, you can follow these steps: 1. Set up a backend API to issue JWTs. 2. Use a library like jsonwebtoken to sign and verify tokens. 3. Store the JWT in cookies or local storage on the client side. 4. Create a context or state management solution to handle user authentication state.

What libraries do I need for JWT in Next.js?

You will need libraries like jsonwebtoken for handling JWTs, and you might also consider next-auth for a more comprehensive authentication solution.

How do I protect my API routes with JWT?

To protect your API routes, you can create a middleware function that checks for a valid JWT in the request headers. If the token is valid, allow access; otherwise, return a 401 Unauthorized response.

Can I use JWT with server-side rendering in Next.js?

Yes, you can use JWT with server-side rendering. You can verify the token on the server side during the getServerSideProps function to ensure the user is authenticated before rendering the page.