What is Next.js for full-stack?
Next.js is a framework that puts the client and server in one codebase: React components that render on the server, route handlers for APIs, and server actions that let the client call server functions directly. It collapses much of the seam into one tool.
Why it matters
Next.js is one of the most popular ways to build full-stack apps, precisely because it unifies both halves with end-to-end types and one deployment. Many full-stack roles assume it. It also ties together nearly everything in this track — SSR, data flow, auth, deployment — into a single coherent frame.
What to learn
- The App Router and file-based routing
- Server Components versus Client Components
- Route handlers for API endpoints
- Server Actions for client-to-server calls
- Data fetching and caching in Next
- Middleware for auth and redirects
- Deploying a Next.js app
Common pitfall
Marking everything "use client" out of habit, turning Next back into a plain
client app and discarding the server-rendering benefits. Default to Server
Components and add the client boundary only where you need interactivity or
browser APIs. Over-using "use client" is the most common way people lose what
Next offers.
Resources
Primary (free):
- Next.js — Documentation · docs
- Next.js — Learn course · course
- Next.js — Server Actions · docs
Practice
Build a small Next.js feature using the App Router: a Server Component that fetches and renders data, a Server Action that mutates data from a form, and a client boundary only where interactivity needs it. Deploy it. Done when most of the UI is server-rendered and only interactive parts are client components.
Outcomes
- Use the App Router with Server and Client Components.
- Build APIs with route handlers and Server Actions.
- Default to server rendering and minimize the client boundary.
- Deploy a Next.js full-stack app.