Javascript function to retry a promise n no. of times before rejecting.

retry_promise.js

/**
 * Retries a promise n no. of times before rejecting.
 */
async function retryPromise(promise, nthTry) {
  try {
    const res = await promise;
    return res;
  } catch (e) {
    if (nthTry === 1) {
      return Promise.reject(e);
    }
    console.log("retrying", nthTry, "time");
    return retryPromise(promise, nthTry - 1);
  }
}

/**
 * Retries a promise infinite no. of times. Don't use it ever.
 * This is recursion without a base condition.
 */
async function infiniteRetryPromise(promise, nthTry = 0) {
  try {
    const res = await promise;
    return res;
  } catch (e) {
    console.log("retrying", nthTry, "time");
    return infiniteRetryPromise(promise, nthTry + 1);
  }
}

/**
 * Util function to return a promise which is resolved in provided milliseconds
 */
function waitFor(millSeconds) {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      resolve();
    }, millSeconds);
  });
}

/**
 * Retries a promise n no. of times before rejecting.
 * Retries a promise after waiting for {delayTime} milliseconds on a reject.
 */
async function retryPromiseWithDelay(promise, nthTry, delayTime) {
  try {
    const res = await promise;
    return res;
  } catch (e) {
    if (nthTry === 1) {
      return Promise.reject(e);
    }
    console.log("retrying", nthTry, "time");
    await waitFor(delayTime);
    return retryPromiseWithDelay(promise, nthTry - 1, delayTime);
  }
}