import Vue from 'vue'
   import Vuex from 'vuex'
   Vue.use(Vuex)
   const state = {}
   const getters = {}
   const mutations = {}
   const actions = {}
   export default new Vuex.Store({
       state,
       getters,
       mutations,
       actions
   
   })

export default (options = {}) => {
  const storage = options.storage || (window && window.localStorage);
  const key = options.key || "vuex";

  // 獲取state的值
  const getState = (key, storage) => {
    const value = storage.getItem(key);
    try {
      return typeof value !== "undefined" ? JSON.parse(value) : undefined;
    } catch (err) {
      console.warn(err);
    }
    return undefined;
  };

  // 設(shè)置state的值
  const setState = (key, state, storage) =>
    storage.setItem(key, JSON.stringify(state));

  return (store) => {
    // 初始化時(shí)獲取數(shù)據(jù)，如果有的話，把原來的vuex的state替換掉
    const data = Object.assign(store.state, getState(key, storage));
    if (data) {
      store.replaceState(data);
    }

    // 訂閱 store 的 mutation。handler 會在每個(gè) mutation 完成后調(diào)用，接收 mutation 和經(jīng)過 mutation 后的狀態(tài)作為參數(shù)
    store.subscribe((mutation, state) => {
      setState(key, state, storage);
    });
  };
};

import VuexPersist from "@/plugins/VuexPersist";

export default createStore({
  plugins: [VuexPersist()],
});