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Learn Next.js

A free, interactive Next.js course that takes you from React components to a real app: file-system routing, nested layouts, server and client components, data fetching, loading and error states, and server actions - finishing with a complete Next.js project. Part of the wider React journey, so the component fundamentals you need are right there, with AI hints when you get stuck and a free certificate when you finish.

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1,000+ codders enrolled

47 lessons32 challenges99 quiz questions

  • Beginner friendly
  • sparkles iconAI-assisted coding help
  • hint iconHands-on interactive lessons
  • volume On iconAudio narration on every lesson
  • quiz iconQuizzes to test your knowledge
  • certificate iconFree certificate of completion

Syllabus

1 sections1 projects47 lessons32 challenges99 quiz questions

This section is part of the React Journey. The full syllabus has more sections - click any preview below to view it on the Journey page.

  1. Section 1Fundamentals42 lessons
  2. Section 2

    Next.js Essentials

    Start sectionStartExpandCollapse    Go from React components to a real app: file-system routing, layouts, server and client components, data fetching, server actions, and a complete Next.js project.47 lessons32 challenges99 questions1 project

    Why Next.js

    4 lessons39

    Routing & Links

    6 lessons516

    Layouts & Metadata

    6 lessons515

    Server & Client

    6 lessons515

    Data on the Server

    6 lessons516

    Server Actions

    5 lessons413

    Client Navigation

    5 lessons515

    Project: Coddy Eats

    Project9 lessons
View the full React Journey syllabus
What you get
Everything you'll use to learn to code

Learn by Doing

Write real code, query databases, build websites, and master AI prompts. Our interactive lessons cover every skill modern developers need.

playground.js
Code Editor
1const greeting = "Hello, Coddy!"
2function sayHi(name) {
3    return greeting + " " + name
4}
5
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Input
"Alex"
Output
"Hello, Coddy! Alex"

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Take your coding journey on the go! No setup, no downloads - just open and start coding. Available on iOS, Android and Web with 4.9 star ratings.

Python
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Variables
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Compete on global leaderboards, invite friends to earn rewards, and celebrate each other's wins. Coding is better with friends!

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Every way to learn

Read, listen, test yourself, ask the AI, or look up anything you've already covered. Every lesson meets you where you are.

Intro to Variables
Audio

A variable is a named container that stores a value you can reference later in your program.

In Python, you create one by writing the name, an equals sign, then the value you want to store.

The value can change over time - reassigning the name simply points it to a new value.

1xSarah

Prove Your Skills

Earn certificates for every course you complete. Add them to your LinkedIn profile and resume to showcase your coding expertise to employers.

CoddyCertificate of Completion
This certifies thatJohn Doehas successfully completed
PythonPython Fundamentals
Verified
DateJan 2026
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Why learn Next.js with Coddy

  • Build Next.js apps in your browser. No Node install, no create-next-app, no config - every lesson hands you a real app directory with layout, pages and components to edit.
  • The App Router the way it's used in production: folders as routes, dynamic segments, nested layouts, server vs client components, data fetching, loading and error states, and forms with server actions.
  • AI hints that read your actual code. When a route 404s or a server component breaks, you get a nudge that points at the problem without giving the answer away.
  • A free certificate when you finish the section - Next.js is the most in-demand React framework, and it's what modern frontend job listings ask for alongside React itself.

Frequently asked questions about learning Next.js

What is Next.js?

Next.js is a React framework for building full web applications. React gives you components; Next.js adds everything around them - file-system routing, nested layouts, server-side rendering, data fetching, and server actions for handling forms and mutations. It's built and maintained by Vercel and is the most widely used React framework in production.

Do I need to know React before learning Next.js?

Yes - Next.js is built on React, so components, props and state should feel familiar first. This section is the second part of the React journey: the Fundamentals section before it covers exactly that groundwork, so you can go straight through in order.

Does the course cover the App Router?

Yes - the section is built around the modern App Router: the app directory, folders as routes, dynamic route segments, nested layouts, and the server/client component model. That's the architecture new Next.js projects use by default and what current job postings expect.

What's the difference between server and client components?

Server components render on the server - they can fetch data directly and ship less JavaScript to the browser. Client components run in the browser and handle interactivity: state, events, effects. Next.js apps mix both, and knowing which to reach for is one of the core skills this section drills.

Can I learn Next.js online for free?

Yes. The interactive Next.js section is free - full lessons, real code challenges with instant feedback, and AI hints. Everything runs in your browser, so you don't need to install Node or scaffold a project to start.

Do I get a certificate after the Next.js course?

Yes. Finishing the section earns you a free certificate of completion you can share on LinkedIn or add to your resume - alongside the complete Next.js project you build in the final chapters.
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Learn Next.js Essentials with Coddy

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