Next.js Server Actions

Overview

Server Actions are asynchronous functions that execute on the server. They can be called from Client and Server Components for data mutations, form submissions, and other server-side operations.

Defining Server Actions

In Server Components

Use the 'use server' directive inside an async function:

// app/page.tsx (Server Component)
export default function Page() {
  async function createPost(formData: FormData) {
    'use server'
    const title = formData.get('title') as string
    await db.post.create({ data: { title } })