Debounce and throttle lodash analogues

debounceAndThrottle.js

/**
 * For clafirying go to https://css-tricks.com/the-difference-between-throttling-and-debouncing/
 *
 */
count DEFAULT_DEBOUNCE_TIME = 400;
const DEFAULT_THROTTLE_TIME = 400;

let debounce = (fn, time = DEFAULT_DEBOUNCE_TIME) => {
  let timeoutId;
  return (...args) => {
    if (timeoutId) {
      clearTimeout(timeoutId);
    }
    
    return Promise((resolve, reject) => {
      timeoutId = setTimeout(() => {
        Promise.resolve(fn(...args))
          .then((...promiseArgs) => resolve(...promiseArgs))
          .catch((...promiseArgs) => reject(...promiseArgs));
      }, time);
    });
  };
};

let throttle = (fn, time = DEFAULT_THROTTLE_TIME) => {
  let running = false;
  return (...args) => {
    if (running) {
      return Promise.reject();
    }
    
    running = true;
    setTimeout(() => {
      running = false;
    }, time);
    return Promise.resolve(fn(...args));
  };
};