Demo

Next-Router-State-Tree explorer

Soft-navigate between the routes below. The panel on the right intercepts every RSC fetch and decodes the Next-Router-State-Tree the browser attaches. Hard-load any URL — no fetch happens, so nothing is captured.

Optional catch-all — segment [[...region]] = ["philippines"]

Philippines

Scattered offshore islets host transient flocks moving between the larger landmasses.

Drill in

Palawan

On the next outbound RSC fetch, this optional catch-all encodes as ["region", "philippines", "oc"] when populated, or just disappears from the path when empty. The "oc" type distinguishes it from a required catch-all [...region] (which would be "c").

Firewall Playground