Next.js 15 brings major improvements to the App Router, React 19 support, and a faster dev server. Here's everything you need to know to get started quickly.
Why Next.js 15?
Next.js 15 is a significant release that brings React 19 support, an improved App Router, and much faster local development thanks to Turbopack being stable. If you are building a modern web application, this is the version to start with.
Setting Up Your Project
Bootstrap a new project with a single command:
npx create-next-app@latest my-appThe CLI will ask whether you want TypeScript, ESLint, Tailwind CSS, and the App Router — say yes to all of them.
Understanding the App Router
The App Router uses a file-based routing system where every folder inside app/ becomes a route segment. A page.tsx file inside that folder renders the UI for that route.
Server Components by Default
Every component in the App Router is a React Server Component by default. This means you can fetch data directly inside your components without useEffect or useState — the data is fetched on the server and sent as HTML to the client.
Next Steps
Once your project is running, explore layouts, loading states, and server actions. These three features alone will handle 90% of what you need to build a production application.
Osama Habib
Multan, Pakistan
Full Stack Developer specialising in Next.js, Node.js, and the MERN stack. I write about modern web development, system design, and practical engineering.