Function callbackifyOnRejected

lib/util.js:384–394

(reason, cb)

}

const callbackifyOnRejected = (reason, cb) => {
  // `!reason` guard inspired by bluebird (Ref: https://goo.gl/t5IS6M).
  // Because `null` is a special error value in callbacks which means "no error
  // occurred", we error-wrap so the callback consumer can distinguish between
  // "the promise rejected with null" or "the promise fulfilled with undefined".
  if (!reason) {
    reason = new ERR_FALSY_VALUE_REJECTION.HideStackFramesError(reason);
    ErrorCaptureStackTrace(reason, callbackifyOnRejected);
  }
  return cb(reason);
};

/**
 * Converts a Promise-returning function to callback style