Page

• ERSC.Page.make({ render }) creates a static route leaf.
• ERSC.Page.make({ params, render }) creates a parameterized route leaf.

render returns an Effect whose requirements fit the ERSC service union. For parameterized Pages, the Schema's encoded keys must exactly match the path parameters and accept strings. Compose the Page with Routes.page.

Pages produce React output. On GET/HEAD, the request handler decodes parameters once before rendering, with services from existing route middleware available. Rejected parameters receive an empty 404, including navigation Flight requests; unmatched routes also receive native 404 responses. Other failures keep their existing error behavior.

Server Function POST refreshes decode parameters inside Page rendering. A rejection follows React's render-error path without replacing the completed Server Function result with a 404.