Next.js 15 Beta Adds Partial Prerendering & React 19

Next.js 15 Beta Released

• Vercel introduces Next.js 15 Beta, packed with new features and performance upgrades.

• Emphasizes enhanced developer experience and production-ready flexibility.

Partial Prerendering (PPR)

• Key feature: Partial Prerendering, combines SSR and static rendering.

• Allows pages to be partly pre-rendered and completed on the client.

Built-In React 19 Support

• Fully compatible with React 19 Beta, including Streaming Server Components and Actions API.

• Native use() hook integration improves async rendering.

Turbopack Improvements

• Turbopack, the Rust-based bundler, sees major performance gains.

• Faster dev builds, improved cache performance, and more stable HMR.

Updated Routing Features

• Enhancements to App Router for better nested layouts and data fetching.

• Simpler handling of dynamic routes with new conventions.

Image Optimization Revamp

• New next/image features: responsive loading strategies and cache optimizations.

• Enhanced support for modern formats like AVIF and WebP.

Improved Middleware API

• More powerful edge middleware for real-time personalization.

• Supports custom logic based on geolocation, headers, or cookies.

Built-in SEO Enhancements

• Native structured data support with new metadata configuration options.

• Easier sitemap generation and canonical tag handling.

Better Error Handling & Debugging

• Clearer stack traces and improved logging with React 19.

• Enhanced DevTools integration for tracing async operations.

Deployment-Ready