MatchedRoute.params

readonly params: Record<string, string>

A map of the parameters from the route

const router = new FileSystemRouter({
  dir: "/path/to/files",
  style: "nextjs",
});
const {params} = router.match("/blog/2020/01/01/hello-world");
console.log(params.year); // "2020"
console.log(params.month); // "01"
console.log(params.day); // "01"
console.log(params.slug); // "hello-world"