Fetch

In App Router, fetch runs on the server in RSC and ties into caching and rendering modes.

Server-side fetch

• In RSC, fetch runs on the server and caches by default.
• In Client Components, fetch behaves like browser fetch.

Cache policies

fetch(url); // cache: "force-cache" (default)

fetch(url, { cache: "no-store" }); // SSR every request

fetch(url, { next: { revalidate: 60 } }); // ISR

Rendering mode mapping

What makes a route dynamic

• cookies or headers
• cache: "no-store"
• dynamic = "force-dynamic"
• dynamic params