nextjs-data-cache-functions

To invalidate cached data in Next.js, use revalidatePath to purge route caches or revalidateTag to target specific cache entries tagged with cacheTag, ensuring users see fresh data after updates.

In Next.js 16, 'use cache' is the modern directive for fine-grained data caching, while unstable_cache is the legacy function. Both allow control over caching behavior, but 'use cache' integrates with cacheTag and cacheLife profiles.

To run background tasks after sending a response in Next.js, use the after() function within Server Actions. This allows you to execute post-response actions like logging or analytics without blocking the user's request completion.

Use connection() in Next.js when you need to opt-out of static rendering and force dynamic rendering. This is necessary when a component relies on dynamic request data like cookies() or headers() that cannot be statically optimized at build time.

Yes, you can access request headers and cookies in Next.js App Router components using the synchronous headers() and cookies() functions. They allow reading and writing request-specific data directly within Server Components and Server Actions.