Function: timeout()

function timeout<T, E>(duration, task): Task<T, TimeoutError | E>;

interface FetchError {
  readonly type: "FetchError";
  readonly error: unknown;
}

// Task version of fetch with proper error handling and cancellation support.
const fetch = (url: string) =>
  toTask((context) =>
    tryAsync(
      () => globalThis.fetch(url, { signal: context?.signal ?? null }),
      (error): FetchError => ({ type: "FetchError", error }),
    ),
  );

// `satisfies` shows the expected type signature.
fetch satisfies (url: string) => Task<Response, FetchError>;

const fetchWithTimeout = (url: string) => timeout("2m", fetch(url));

const result1 = await fetchWithTimeout("https://api.example.com/data")();
result1 satisfies Result<Response, FetchError | TimeoutError>;

// With AbortController
const controller = new AbortController();
const result2 = await fetchWithTimeout("https://api.example.com/data")(
  controller,
);
result2 satisfies Result<Response, FetchError | TimeoutError | AbortError>;