Next.js · Beginner guide
Getting Started with Next.js: A Practical Beginner Guide
A calm route through the concepts that matter, without trying to learn the entire framework in one weekend.
Next.js feels large when every feature looks equally important. It becomes approachable when you see it as React plus a set of strong defaults for routing, rendering, assets, and production delivery.
01 / THE MENTAL MODEL
Start with the app folder
Inside the App Router, a folder normally represents a URL segment and a page.js file provides the screen. Create app/about/page.js and Next.js creates /about.
app/
layout.js // shared shell
page.js // /
about/
page.js // /about
blogs/
[slug]/
page.js // /blogs/:slug02 / SERVER FIRST
Choose the browser boundary intentionally
Pages are Server Components by default. They can prepare content without shipping that component's JavaScript to the browser. Add "use client" only when a component needs state, event handlers, effects, or browser APIs.
Keep on the server
Article content, project lists, data fetching, metadata, and non-interactive layouts.
Move to the client
Theme toggles, forms with live validation, modals, filters, and browser-only behavior.
03 / RENDERING
Use the simplest rendering mode that fits
If content is known during the build, static rendering is fast, cacheable, and excellent for search. If it depends on the current request or changes constantly, render dynamically. The best default is not the fanciest option; it is the least complex option that stays correct.
A useful first project
Build one small, complete website
Include a homepage, a list page, a detail route, shared layout, loading state, and real metadata. A connected project teaches more than disconnected examples because every architectural choice has a consequence.