Next.js Server Actions Let Developers Skip API Routes for Data Mutations

Next.js Server Actions are asynchronous server-side functions that can be called directly from React components, including client-side ones, removing the need for separate API endpoints. Traditionally, handling form submissions in React SPAs required building dedicated backend routes, managing CORS, and manually syncing UI state — a process involving significant boilerplate code. With Server Actions, developers use a 'use server' directive to write backend logic, such as database mutations, that never reaches the browser. Forms can wire these actions directly via the HTML action attribute, enabling progressive enhancement even before JavaScript fully loads. The approach is said to reduce codebase complexity, provide end-to-end type safety, and simplify loading and error state management.