Next-js 15 is Stable and Production-Ready: Key Highlights

Next.js 15 has officially launched, bringing exciting updates for developers, including support for React 19 and enhanced app development features.

Here is a summary of the original blog, highlighting key updates and changes that are most important for developers looking to leverage the new version.

#Table of contents

• New Features
• Breaking Changes

#New Features

• Easy Upgrade: Upgrade easily with the @next/codemod CLI.
• Server Actions Security: Unguessable endpoints and removal of unused actions.
• React 19 Support: Aligns with the upcoming stable release of React 19.
• Static Indicator: New visual indicator shows static routes during development.
• TurboPack Stability: Experience faster local server startup and quicker code updates.
• TypeScript Support: Now supports .ts files in next.config.

#Breaking Changes

• cookies
• headers
• draftMode
• params in layout.js, page.js, route.js, default.js, generateMetadata, and generateViewport
• searchParams in page.js

To easily update, run:

npx @next/codemod@canary next-async-request-api .

For more help, check the upgrade guide https://nextjs.org/docs/app/building-your-application/upgrading/version-15

For a complete breakdown of features, visit the original blog on the Next.js website.