Next.js 15 Beta: Server Actions and Prerendering

Next.js 15 Beta Launches with Server Actions and Partial Prerendering

Web Development
June 03, 2025

Next.js 15 Beta Released
- Vercel announced the beta version during its latest developer conference.
- Focuses on dynamic performance, edge computing, and DX enhancements.
Server Actions (Stable)
- Allows developers to mutate data on the server directly from the client.
- Simplifies form handling and reduces boilerplate API routes.
Partial Prerendering (Experimental)
- New feature that allows combining static and dynamic rendering on a single page.
- Enhances Core Web Vitals by deferring dynamic content load.
Turbopack Improvements
- Replaces Webpack with faster Rust-based bundling engine.
- Builds and hot reloading are up to 10x faster than before.
Improved App Router
- Enhanced routing API supports layouts, loading states, and error boundaries more effectively.
- Encourages better architectural separation.
React Compiler Ready
- Next.js 15 supports React 19's new compiler optimizations.
- Developers can experiment with automatic memoization.
Middleware and Edge Support
- Extended capabilities for edge functions and regional API routing.
- Enables true personalization at the edge.
Enhanced SEO Defaults
- New metadata API streamlines the process of managing SEO tags.
- Dynamically updates meta tags based on routing context.
File-Based Caching
- Introduced smarter caching based on static file invalidation.
- Helps reduce re-renders and accelerates deployments.
Beta Feedback Open
- Vercel invites developers to try the beta and submit feedback via GitHub.
- Full release expected within Q3 2025 after bug fixes and stabilization.