1、权限控制
例如：登录后登录前的页面不一样
借助路由元信息完成
一个示例：
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <script src="./node_modules/vue/dist/vue.js"></script> <script src="./node_modules/vue-router/dist/vue-router.js"></script> </head> <body> <div id="app"> <!-- 声明式导航 --> <router-link to="/home">首页</router-link> <router-link to="/blog">我的博客</router-link> <router-link to="/login">登录</router-link> <!-- <router-link to="/blog">退出</router-link> --> <a href="javascript:void(0)" @click="clear">退出</a> <router-view></router-view> </div> </body> <script> Vue.use(VueRouter) let Home = { template: ‘<h1>首页内容</h1>‘ } let Blog = { template: ‘<h1>博客页内容</h1>‘ } let Login = { template: `<div> <input type="text" v-model="name"> <input type="text" v-model="pwd"> <input type="button" value="登录" @click="login"> </div>`, data() { return { name: ‘‘, pwd: ‘‘ } }, methods: { login() { localStorage.setItem(‘user‘, this.name) //利用编程式导航实现登陆后跳转 this.$router.push({name:‘blog‘}) } } } var router = new VueRouter({ routes: [ { path: ‘/home‘, component: Home }, { path: ‘/‘, redirect: ‘home‘ }, { path: ‘/blog‘, component: Blog, name:‘blog‘, //为未来的路由作权限控制 全局路由守卫作参照条件 meta: { //若auth为true，则用户访问该组件时需要登录 auth: true } }, { path: ‘/login‘, component: Login } ] }) router.beforeEach((to, from, next) => { if (to.meta.auth) { if (localStorage.getItem(‘user‘)) { next()//已有登录状态，放行 } else {//需要登录 next({ path: ‘/login‘ })//未登录，利用next重定向至登录组件 } } else { next()//放行 } }) new Vue({ el: ‘#app‘, router, methods:{ clear(){ localStorage.removeItem(‘user‘) this.$router.push(‘/login‘) } } }) </script> </html>
2、keep-alive
1）
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <script src="./node_modules/vue/dist/vue.js"></script> <script src="./node_modules/vue-router/dist/vue-router.js"></script> </head> <body> <div id="app"> </div> </body> <script> Vue.use(VueRouter) let Series = { template: `<div>付费栏目</div>` } let Topics = { template: `<div>砖头广场</div>` } let App = {//keep-alive将组件状态放至缓存中保存起来 template: `<div> <router-link to="/series">付费栏目</router-link> <router-link to="/topics">砖头广场</router-link> <keep-alive> <router-view></router-view> </keep-alive> </div>` } let router=new VueRouter({ routes:[ {path:‘/series‘,component:Series}, {path:‘/topics‘,component:Topics}, ] }) new Vue({ el: ‘#app‘, template: `<App />`, components: { App }, router }) </script> </html>
原文：https://www.cnblogs.com/Tanqurey/p/10767846.html