1.在src下建立router，在router中建立文件index

2.将main.js中部分内容复制

App

<template>
<div>
  <a href="#/friend">朋友</a><br>
  <a href="#/info">信息</a><br>
  <a href="#/music">音乐</a>
  <p><router-view></router-view></p>
</div>
</template>

<script>

export default {
}
</script>

<style>

</style>

index.js

import Vue from 'vue'
import VueRouter from "vue-router";
import MyFriend from "../views/MyFriend";//由于上一层级是src，需要返回src寻找该组件
import MyInfo from "../views/MyInfo";
import MyMusic from "../views/MyMusic";
//3.注册
Vue.use(VueRouter)

//4.创建路由器对象,路由规则
const router = new VueRouter({
    routes:[{path:'/friend',component:MyFriend},
    {path:'/info',component:MyInfo},
    {path:'/music',component:MyMusic}
    ],
   
  })
  export default router //需要导出router

main.js

//导入核心组件
import Vue from 'vue'
import App from './App.vue'
import router from "./router/index";
//1.控制台下载安装npm add vue-router@3.6.5
Vue.config.productionTip = false
//main.js导入子组件
// import ButtOne from "./components/ButtOne";
// 全局注册
// Vue.component('ButtOne',ButtOne)

//提示：当前处于什么环境
Vue.config.productionTip = true
//Vue实例化：提供了render方法=>基于App.vue创建结构渲染index.html

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

结果

import Vue from 'vue'

import VueRouter from "vue-router";

import MyFriend from "@/views/MyFriend";//由于上一层级是src，需要返回src寻找该组件

import MyInfo from "@/views/MyInfo";

import MyMusic from "@/views/MyMusic";

@指代src目录

跳转：配置to无需#号

高亮:1.router-link-active：模糊匹配，可以匹配多个路径

2..router-link-exact-active：精确匹配

自定义类名