vue项目中定义全局变量、函数的几种方法

const token='12345678';
const userStatus=false;
export default {
  token, // 用户token身份
  userStatus // 用户登录状态
}

import global from '../../ponents/Global'//引用模块进来
export default {
data () {
  return {
     token:global.token,//将全局变量赋值到data里面
    }
  }
}

import global from '../../ponents/Global'
Vue.prototype.GLOBAL = global

export default {
 data () {
  return {
   token: this.GLOBAL.token,
  }
 }
}

// index.js文件里定义vuex
import state from './state'
export default new Vuex.Store({
 actions,
 getters,
 mutations,
 state,
})
// state.js里面存放全局变量，并且暴露出去
const state = {
 token'12345678',
 language: 'en',
}

export default state

export default {
  methods: {
   getInternation() {
    if (this.$store.state.language === 'en') {
     this.internation = 2
    } else if (this.$store.state.language === 'zh_CN') {
     this.internation = 1
    }
   }
  } 
}

// 将方法挂载到vue原型上
Vue.prototype.changeData = function (){
 alert('执行成功');
}

//直接通过this运行函数，这里this是vue实例对象
this.changeData();

exports.install = function (Vue, options) {
  Vue.prototype.changeData = function (){
    alert('执行成功');
  };
};

import base from './base'
Vue.use(base);

this.changeData();