Learn NEXT-JS with Real Code Examples
Updated Nov 21, 2025
Explain
Next.js helps developers build production-ready React applications with routing and rendering handled out of the box.
It provides hybrid rendering models like SSR, SSG, ISR, and RSC.
Next.js is optimized for performance, scalability, and full-stack React development.
Core Features
Server Components by default
Dynamic and static routing
Layouts and nested routing
Next.js API routes for backend logic
Middleware for edge functions
Basic Concepts Overview
Server vs Client components
Layouts and nested routes
Rendering models (SSR, SSG, ISR)
API routes and server actions
Image and font optimization
Project Structure
app/ - routing, pages, layouts
components/ - UI building blocks
public/ - static files
styles/ - global or module CSS
next.config.js - framework configuration
Building Workflow
Create routes inside `app/` directory
Use components inside server or client boundaries
Fetch data using server components or APIs
Style using CSS modules, Tailwind, or styled-components
Build and deploy via Vercel or Node servers
Difficulty Use Cases
Beginner: static pages
Intermediate: SSR pages + API routes
Advanced: RSC + streaming + middleware
Expert: multi-tenant full-stack SaaS
Community: open-source Next.js plugins
Comparisons
More full-stack than React alone
More enterprise-ready than SvelteKit
More flexible rendering than Angular
More SEO-friendly than Vue/Nuxt (historically)
Built for performance at scale
Versioning Timeline
2016 – Initial release
2019 – Major SSR/SSG improvements
2020 – Next.js 10 with image optimization
2022 – App Router + RSC (Next.js 13)
2023–2025 – Stabilized RSC, server actions, Turbopack
Glossary
RSC: React Server Components
ISR: Incremental Static Regeneration
Middleware: Edge-based request logic
Segment: A folder-based route unit
Layout: Persistent UI wrapper per route