How generateStaticParams Interacts With Next.js Cache Components: Key Findings

A developer built a test project to answer unresolved questions about how generateStaticParams behaves with Next.js Cache Components, after community members raised edge cases in a previous post. The tests showed that knowing route IDs at build time does not automatically exempt a route from the stream, cache, or block requirement enforced by Cache Components. Using a Suspense wrapper passes the build but leaves known static IDs marked as Partial Prerender, while replacing it with a 'use cache' directive bakes those paths into fully static output. When a layout and a page both access the same route params unguarded, fixing only the page component is insufficient — the layout must also be addressed independently. Additionally, the dynamicParams route config option is disabled when cacheComponents is active, meaning unlisted IDs are handled at request time rather than returning a 404.