rigging-reducers.js

/** src/reducers/cart.js **/

const initialState = {
  ...window.shopifyData.cart, // Rehydrate cart state from server data
  isUpdating: false
};

const cart = (state = initialState, action) => { // Bootstrap initial state
  switch (action.type) {
    case 'CART_IS_UPDATING': {
      return {
        ...state,
        isUpdating: true
      };
    }
    case 'CART_UPDATED': {
      const { newCart } = action;

      return {
        ...state,
        ...newCart,
        isUpdating: false
      };
    }
    default:
      return state;
  }
};

export default cart;