debouncePromise.js

export default function debouncePromise(fn, delay) {
  let time = null;
  return (...args) => {
    if (time) {
      clearTimeout(time);
    }
    return new Promise((res, rej) => {
      time = setTimeout(() => {
        fn.apply(null, args)
          .then((...resArgs) => res.apply(null, resArgs))
          .catch(e => rej(e));
      }, delay);
    });
  };
}