Learn how to upgrade your existing Next.js application from the Pages Router to the App Router.| nextjs.org
Next.js enables starting as a static site or Single-Page Application (SPA), then later optionally upgrading to use features that require a server.| nextjs.org
Next.js 13 introduces layouts, React Server Components, and streaming in the app directory, as well as Turbopack, an improved image component, and the brand new font component.| nextjs.org
Nested routes and layouts, client and server routing, React 18 features, and designed for Server Components.| nextjs.org
