Fetch with timeout and optional cancellation

interruptible_fetch.ts

export const fetchWithTimeout = (
  uri: RequestInfo,
  timeout: number,
  options: RequestInit = {}
): [Promise<Response>, () => void] => {
  const controller = new AbortController();
  const timer = setTimeout(controller.abort, timeout);
  const promise = fetch(uri, { ...options, signal: controller.signal });
  promise.finally(() => clearTimeout(timer));
  return [promise, controller.abort];
};