React Server Actions - Form Handling

When to use this skill

• Handling form submissions in Next.js 14+ applications
• Performing server-side data mutations without API routes
• Implementing progressive enhancement for forms
• Creating actions that work without client-side JavaScript
• Validating form data securely on the server
• Revalidating Next.js cache after data mutations
• Handling file uploads with server-side processing
• Implementing optimistic UI updates with useOptimistic
• Building accessible forms with server-first architecture
• Integrating with database operations directly
• Managing form state with useFormState hook
• Creating secure mutations with server-only code

When to use this skill

• Implementing forms, mutations in Next.js App Router.
• When working on related tasks or features
• During development that requires this expertise

Use when: Implementing forms, mutations in Next.js App Router.

Server Action

```typescript 'use server';

export async function createPost(formData: FormData) { const title = formData.get('title'); await db.post.create({ data: { title } }); revalidatePath('/posts'); } ```

Resources

• Server Actions