Data Fetching Skill

Overview

Modern data fetching in Next.js with server actions, caching strategies, and revalidation.

Capabilities

• Server Actions: 'use server' for mutations
• Caching: Automatic request memoization
• Revalidation: Time-based and on-demand
• Streaming: Progressive rendering
• Parallel Fetching: Promise.all patterns

Examples

// Server Action
'use server'

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

// Data fetching with caching
async function getData() {
  const res = await fetch('https://api.example.com/data', {
    next: { revalidate: 3600 } // Revalidate every hour
  })
  return res.json()
}

Caching Options

• cache: 'force-cache' - Default, cached
• cache: 'no-store' - No caching
• next: { revalidate: N } - Revalidate after N seconds