Next.js 15 Beta Released by Vercel

Aims to push React-based web development further with smarter builds and server-side logic improvements.

New Compiler: Turbopack as Default

Replaces Webpack in development mode.

Offers 5x faster cold starts and ~700x faster updates on large projects.

Built in Rust for performance and scalability.

Partial Prerendering (PPR)

Allows pre-rendering of static parts of a page while deferring dynamic ones until request time.

Combines SSG and SSR in a single page for optimal performance and SEO.

Improved Server Components Support

React Server Components (RSC) now fully integrated and stable.

Reduces bundle sizes by enabling server-only logic.

Enhanced App Router Stability

Bug fixes and better dev experience with file-based routing and layouts.

Refined loading UI and error boundaries.

Better TypeScript Integration

Faster type checking and IntelliSense.

Improved support for strict mode and automatic types in layouts and API routes.

Optimized Image Component

Image optimization is faster with AVIF and WebP by default.

Includes support for responsive images and aspect-ratio controls.

Built-In SEO Helpers

Metadata API makes SEO configuration more declarative and dynamic.

Supports dynamic metadata generation based on page props.

Enhanced Middleware & Edge Functions

Easier creation and deployment of Edge APIs.

Lower latency and tighter integration with Vercel’s Edge Network.

CLI & DevTools Upgrades

Faster next dev and smarter error messages.

New profiling tools available in Next DevTools extension.