This content originally appeared on DEV Community and was authored by oliviarizona
@next/codemod CLI: Upgrade seamlessly to the latest versions of Next.js and React with this command-line tool.
Async Request APIs (Breaking): Request-specific APIs are now asynchronous, paving the way for future optimizations. A codemod is provided to help with migration.
Caching Semantics (Breaking): By default, fetch requests, GET Route Handlers, and client-side navigations are no longer cached. However, caching can be manually enabled.
React 19 Support: Next.js 15 includes support for React 19, with experimental features like the React Compiler and improved error handling during hydration.
Turbopack Dev (Stable): Turbocharged development performance with faster startup times and more responsive code updates, thanks to Turbopack.
Static Indicator: A new visual indicator in development mode to highlight static routes, making optimization easier.
unstable_after API (Experimental): A new API that lets you run code after streaming a response, ideal for tasks like logging and analytics.
instrumentation.js API (Stable): This new server lifecycle API improves observability, offering integrations with tools like OpenTelemetry.
Enhanced Forms (next/form): The
component enhances regular HTML forms by adding client-side navigation and prefetching capabilities.TypeScript Support for next.config.ts: Improved TypeScript integration for next.config.ts, offering type safety, autocompletion, and better developer experience.
Self-hosting Improvements: New features for self-hosting, including more control over Cache-Control headers, optimized image handling, and automatic use of sharp for image processing.
Server Actions Security: Server actions are now more secure with unique action IDs and automatic cleanup of unused actions.
Bundling External Packages (Stable): Automatic bundling for external packages is now supported for both the App and Pages Routers, with new configuration options.
ESLint 9 Support: Full compatibility with ESLint 9, ensuring smooth transitions while maintaining backward compatibility.
Performance Improvements: Build times and Fast Refresh speeds have been significantly optimized, making the development process even faster and smoother.
This content originally appeared on DEV Community and was authored by oliviarizona
oliviarizona | Sciencx (2024-10-23T06:14:12+00:00) nextjs 15. Retrieved from https://www.scien.cx/2024/10/23/nextjs-15/
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