vue设置全局变量和修改

import Vue from ‘vue‘;

let MyComm = new Vue({
    methods: {
        deleteCookie: function (cname) {
            let d = new Date();
            let expires = "expires=" + d.toGMTString();
            document.cookie = cname + "=; " + expires;
        }
})

export default MyComm;

import MyComm from "./components/common/comm";
MyComm.deleteCookie(‘ms_username‘)

import Vue from ‘vue‘;

let MyComm = new Vue({
    methods: {
        deleteCookie: function (cname) {
            let d = new Date();
            let expires = "expires=" + d.toGMTString();
            document.cookie = cname + "=; " + expires;
        }
})

export default MyComm;
Vue.prototype.$MyComm = MyComm;
//项目中任何地方都可如此引用 
this.$MyComm.deleteCookie(‘ms_username‘)

new Vue({
    router,
    data: function(){
        return {
            URL: ‘http://localhost:8080‘,
        }
    },
    render: h => h(App)
}).$mount(‘#app‘);

// 修改
this.$root.URL= "xxxxx" 

// 引用 
let URL = this.$root.URL