Throw Error on Timeout (Typescript)

throw-error-on-timeout.ts

export async function timeout<T>(promise: Promise<T>, ms: number): Promise<T> {
  let timer: NodeJS.Timeout;
  const res = await Promise.race([
    promise,
    new Promise<'timeout'>(resolve => {
      timer = setTimeout(() => resolve('timeout'), ms);
    })
  ] as const).finally(() => clearTimeout(timer));

  if (res === 'timeout') {
    throw new Error(`${ms}ms timeout`);
  }
  return res;
}