Store Reducer

reducer.js

import * as types from 'constants/products';

const initialState = {
  items: [],
  loading: false,
  error: null,
};

export default function products(state = initialState, action) {
  switch (action.type) {
    case types.LOAD:
      return {
        ...initialState,
        loading: true,
      };
    case types.LOAD_SUCCESS:
      return {
        ...state,
        items: action.items,
        loading: false,
      };
    case types.LOAD_FAIL:
      return {
        ...state,
        error: action.error,
        loading: false,
      };
    default:
      return state;
  }
}