redux

1. cart

import { PayloadAction, createSlice } from "@reduxjs/toolkit";
import Cookies from "js-cookie";
const initialState = {
  loading: true,
  cartItems: [],
};

const cartSlice = createSlice({
  name: "cart",
  initialState,
  reducers: {
    addToCart: (state: any, action: PayloadAction) => {
      const actionItem: any = action.payload;
      const existItem = state.cartItems.find(
        (val: any) => val._id === actionItem._id
      );
      if (existItem) {
        state.cartItems = state.cartItems.map((val: any) =>
          val._id === existItem._id ? actionItem : val
        );
      } else {
        state.cartItems = [...state.cartItems, actionItem];
      }
      Cookies.set("cart", JSON.stringify(state));
    },
    removeToCart: (state: any, action: PayloadAction) => {
      const actionItem: any = action.payload;
      state.cartItems = state.cartItems.filter(
        (val: any) => val._id !== actionItem._id
      );
    },
  },
});

export const { addToCart, removeToCart } = cartSlice.actions;
export default cartSlice.reducer;

1. store provider

"use client";

import { Provider } from "react-redux";
import { store } from "./store";

export function StoreProvider({ children }) {
  return <Provider store={store}>{children}</Provider>;
}