Next.js 15 brings exciting new features and improvements that make building React applications even more powerful and efficient. In this comprehensive guide, we'll walk through setting up a new Next.js project with TypeScript and explore the latest features.
What's New in Next.js 15
App Router Improvements
The App Router has been refined with better type safety and improved performance. TypeScript support is now more robust, providing better autocomplete and error checking.
Server Components by Default
Next.js 15 makes Server Components the default, which means better performance and SEO out of the box.
Setting Up Your Project
npx create-next-app@latest my-app --typescript --tailwind --eslint
cd my-app
npm run dev
Project Structure
src/
app/
layout.tsx
page.tsx
globals.css
components/
lib/
Key Features to Explore
- Server Actions - Handle form submissions and mutations
- Parallel Routes - Load multiple pages simultaneously
- Intercepting Routes - Create modal-like experiences
- Streaming - Improve perceived performance
Best Practices
- Always use TypeScript for better development experience
- Leverage Server Components for better performance
- Use the new
use clientdirective only when necessary - Implement proper error boundaries
Conclusion
Next.js 15 with TypeScript provides an excellent foundation for building modern web applications. The combination of Server Components, improved routing, and better TypeScript integration makes it a compelling choice for your next project.