@findify/react-components/lib/helpers/useLazyPromos.js

Findify react UI components

import { useRef, useMemo } from 'react';
import { List } from 'immutable';
import { usePromos } from '@findify/react-connect';

var useLazyPromos = function useLazyPromos() {
  var cachedPromos = useRef(List());

  var _usePromos = usePromos(),
      promos = _usePromos.items;

  return useMemo(function () {
    var promosToAdd = promos.filter(function (p) {
      return !cachedPromos.current.includes(p);
    });
    cachedPromos.current = cachedPromos.current.concat(promosToAdd);
    return cachedPromos.current;
  }, [promos]);
};

export default useLazyPromos;