PartialRender
The server-rendering bundle's: a page's shell, rendered ahead, and the rest of it, rendered for a request.
export interface PartialRender { prerenderShell( signal: AbortSignal, onError: (e: unknown) => void, ): Promise<{ html: string; postponed: unknown }>; resume( postponed: unknown, write: (html: string) => void, onError: (e: unknown) => void, ): Promise<{ done: Promise<void> }>; }