Store就是全局变量都是可以双向绑定的，以下是模块的用法：

state定义的是变量名称，mutations里面是给变量赋值的方法

export default {
    namespaced: true,
    state: {
        //打开的Tabs
        tabs: null,
        //当前显示的key
        selectTabKey: null
    },
    mutations: {
        setSelectTabKey(state, key) {
            state.selectTabKey = key;
            localStorage.setItem(process.env.ADMIN_TABS_SELECT_KEY, JSON.stringify(key));
        },
        setTabs(state, tabs) {
            state.tabs = tabs;
            localStorage.setItem(process.env.ADMIN_TABS_KEY, JSON.stringify(tabs));
        },
        initTabs(state, tab) {
            var localTabs = localStorage.getItem(process.env.ADMIN_TABS_KEY)
            if (localTabs != null) {
                state.tabs = JSON.parse(localTabs);
                state.selectTabKey = JSON.parse(localStorage.getItem(process.env.ADMIN_TABS_SELECT_KEY));
            } else {
                state.selectTabKey = tab.key;
                localStorage.setItem(process.env.ADMIN_TABS_SELECT_KEY, JSON.stringify(state.selectTabKey));

                state.tabs = [];
                state.tabs.push({
                    title: tab.title,
                    icon: tab.icon,
                    content: "",
                    key: tab.key,
                    closable: false,
                    icon_bk: "",
                    url: tab.url,
                });
                localStorage.setItem(process.env.ADMIN_TABS_KEY, JSON.stringify(state.tabs));
            }
        },
        addTabs(state, tab) {
            state.selectTabKey = tab.key;
            localStorage.setItem(process.env.ADMIN_TABS_SELECT_KEY, JSON.stringify(state.selectTabKey));

            var localTabs = localStorage.getItem(process.env.ADMIN_TABS_KEY)
            if (localTabs != null) {
                state.tabs = JSON.parse(localTabs);
            }
            if (state.tabs == null) {
                state.tabs = [];
            }
            //判断有没有在tabs里面
            var isAdd = false;
            for (var pn of state.tabs) {
                if (pn.key == tab.key) {
                    isAdd = true;
                    break;
                }
            }
            if (isAdd == false) {
                state.tabs.push({
                    title: tab.title,
                    icon: tab.icon,
                    content: "",
                    key: tab.key,
                    closable: true,
                    icon_bk: "",
                    url: tab.url,
                });
            }
            localStorage.setItem(process.env.ADMIN_TABS_KEY, JSON.stringify(state.tabs));
        },
    }
}

然后整合模块

import menu from './menu'
import tab from './tab'
import setting from './setting'

export default {menu, tab,setting}

 对外输出

import Vue from 'vue'
import 'es6-promise/auto'
import Vuex from 'vuex'
import modules from './modules'

Vue.use(Vuex)
const store = new Vuex.Store({modules})

export default store

 Main方法注册

 获取

this.$store.state.tab.selectTabKey

赋值

this.$store.commit("tab/setSelectTabKey", targetKey);

 监控值改变

watch: {
    "$store.state.tab.selectTabKey": {
      handler: function (newVal, oldVal) {
        if (this.currTarger != newVal) {
          this.onTabChange(newVal);
        }
      },
    },
  },

可以直接绑定

注意点，全局变量存localstore的时候必须转JSONString，取的时候也得转，否则 绑定到控件上会失效

存

localStorage.setItem(process.env.ADMIN_TABS_SELECT_KEY, JSON.stringify(key));

 取

state.selectTabKey = JSON.parse(localStorage.getItem(process.env.ADMIN_TABS_SELECT_KEY));

之前直接这样写会导致无法绑定到控件

localStorage.setItem(process.env.ADMIN_TABS_SELECT_KEY, key);

state.selectTabKey = localStorage.getItem(process.env.ADMIN_TABS_SELECT_KEY);