路由之间的跳转有再种：
1、通过标签<router-link to='/login'>去登录</router-link>实现跳转
2、通过js实现：
this.$router.push({path:'/buy'})
this.$router.replace({path:'/buy'})
2.1push与replace的区别
push会向history插入新记录
replace不会插入history历史记录，如果返回上一页，则会跳转到上上一页中。上一页是不存在的
返回上一页面：this.$router.go(-1)

<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title></head><body> <div id="app"></div> <script type="text/javascript" src="vue.js"></script> <script type="text/javascript" src="vue-router.js"></script> <script type="text/javascript"> var Login={ template:` <div>去登录去吧</div> ` } var Register={ template:` <div>去注册去吧</div> ` } var Buy={ template:` <div>去买东西</div> ` } // 安装插件 Vue.use(VueRouter); // 创建路由对象 var router = new VueRouter({ // 配置路由对象 routes: [ {path:'/login', name:'login', component:Login}, {path:'/register', name:'register', component: Register}, {path:'/buy', name:'buy', component: Buy} ] }) new Vue({ el:'#app', router, template:` <div> <router-link to='/login'>去登录</router-link> | <router-link to='/register'>去注册</router-link> <div> <button @click="gogo">点我买东西</button> <button @click="back">返回上一页</button></div> <router-view></router-view></div> `, methods:{ gogo(){ // 有历史记录跳转 // this.$router.push({path:'/buy'}) // 没有历史记录跳转 this.$router.replace({path:'/buy'}) }, back(){ // 返回上一页 this.$router.go(-1) } } }) </script></body></html>