文章目录

• 全局参数
• • 形式一
  • 形式二

全局参数

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一定要记得main.js中添加store

写成形式一：（放弃形式二）

形式一

import Vue from "vue";
import Vuex from 'vuex'

Vue.use(Vuex)
const stores = new Vuex.Store({
    state: {
        token: localStorage.getItem("token"),
        userInfo: JSON.parse(sessionStorage.getItem("userInfo"))
    },
    mutations: {
        SET_TOKEN: (state,token) =>{
            state.token = token
            localStorage.setItem("token",token)
        },
        SET_USERINFO: (state,userInfo) =>{
            state.userInfo = userInfo
            sessionStorage.setItem("token",JSON.stringify(userInfo))
        },
        REMOVE_INFO: (state) => {
            state.token = ''
            state.userInfo = {}
            localStorage.setItem("token",'')
            sessionStorage.setItem("userInfo",JSON.stringify(''))
        }
    },
    getters: {
        getUser: state => {
            return state.userInfo
        },
        getToken: state => {
            return state.token
        }
        //其他地方也可以直接 state.token
    },
    actions: {

    },
    modules: {

    }
})
export default stores

main.js

import Vue from 'vue'
import App from './App.vue'
import ElementUI from 'element-ui';
import 'element-ui/lib/theme-chalk/index.css';
import axios from 'axios'
import gg from "@/router";
import stores from "@/store";

Vue.use(ElementUI);
Vue.prototype.$axios = axios
Vue.config.productionTip = false

new Vue({
  render: h => h(App),
  router: gg,
  store: stores
}).$mount('#app')

不添加的话，_this这里会报错

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形式二

import Vue from "vue";
import Vuex from 'vuex'

Vue.use(Vuex)
export default new Vuex.Store({
    state: {
        token: '',
        //userInfo: {}
		userInfo: JSON.parse(sessionStorage.getItem("userInfo"))  //初始化时直接从sessionStore获取，反序列，上同
    },
    mutations: {
		// set方法
        SET_TOKEN: (state,token) =>{
            state.token = token
            localStorage.setItem("token",token)  //存储
        },
        SET_USERINFO: (state,userInfo) =>{
            state.userInfo = userInfo
            sessionStorage.setItem("token",JSON.stringify(userInfo))
        },
        REMOVE_INFO: (state) => {
            state.token = ''
            state.userInfo = {}   //userInfo 是一个对象
            localStorage.setItem("token",'')
            sessionStorage.setItem("userInfo",JSON.stringify(''))  //只能存储字符串，所以要对对象进行序列化
        }
    },
 	getters: {
        //get方法
			getUser: state => {
            	return state.userInfo
        }
        //其他地方也可以直接 state.token
    },
    actions: {

    },
    modules: {

    }
})