Suspense Lab

Suspense and streaming

The route renders a fast shell first, then a slow server component resolves inside an explicit Suspense boundary.

fast shell

Route shell

This content is ready immediately. The slow block below waits on the server and streams into the page when it is ready.

server component

This block waited on the server before rendering. The page shell can stream first while this boundary finishes.

RSCSuspense boundarystreamed later

fallback

This block is visible while the slow server block is rendering.