Server packages

Render components to an HTML string or stream on the server, hydrate the DOM on the client, manage the document head, and extend rendering through the plugin SPI.

The first-party reference strategy pack for SignalX SSR, built on the @sigx/server-renderer plugin API — hydrate only interactive components with client:load / idle / visible / media / only, with per-island code splitting.

Call server code from a component as a plain async function — serverFn / serverStream compile to typed RPC endpoints, run on the server, and return the result. Secure by default: POST-only JSON with a CSRF gate, origin checks, guards and prod error masking.

The resumability layer — single-flight refresh of the server boundaries a mutation invalidated, driven by createBoundaryRefresh and the build-time resume manifest, so a write re-renders only the parts of the page that depend on it.

The codec behind the SSR state blob and server-function arguments — round-trips Date / Map / Set / bigint / URL / RegExp / undefined out of the box, and defineTypeHandler adds your own types with type-guard-driven inference.