Cacheable Components

• Mark an individual React Server Component as cacheable by adding the use cache directive to the top of the function definition.
• When a cacheable component is called with the same inputs, it reuses the cached result if it exists, otherwise it renders and caches the output.

Demo

• A product list component is annotated with use cache.
• An artificial one second delay is added to simulate a slow data request.
• Since the component is cacheable, the delay only happens the first time the component is rendered.
• layout.tsx and page.tsx aren't explicitly annotated with use cache, but Next.js infers they're static because they do not use any Dynamic APIs. If they started to, Next.js will guide the developer to either add use cache or a <Suspense> boundary.

Notes

• This demo uses the experimental use cache directive and describes caching behavior once stable.