下载 npm i vuex-persist --save

引入import vuexPersist from "vuex-persist";

使用

export default new Vuex.Store({
  state: {
    userlist: [],
  },
  mutations: {
    setuser(state, val) {
      state.userlist.push(val);
    },
  },
  actions: {},
  modules: {},
  plugins: [
    new vuexPersist({
      storage: window.localStorage,
    }).plugin,
  ],
});

把下边的代码放在store问价夹里面index.js里面

plugins: [
    new vuexPersist({
      storage: window.localStorage,
    }).plugin,
  ],