vue+Vue Router多级侧导航切换路由(页面)的实现代码

import router from './router'

new Vue({
 el: '#app',
 router,
 components: { App },
 template: '<App/>'
})

<template>
 <div id="app">
  <router-view></router-view>
 </div>
</template>

<template>
  <div>
    <!--v-sidebar是侧导航-->
    <v-sidebar ></v-sidebar>
    <div class="content" :style="{height: (this.$store.state.bodyHeight-20) + 'px',overflow:'auto'}">
     <div></div>
      <transition name="move" mode="out-in">
      <!--这里的router-view用来渲染子页面-->
      <router-view></router-view>  
      </transition>
    </div>
  </div>
</template>
<script>
 //引入侧导航组件
  import vSidebar from '../common/sideMenu.vue';
  export default {
    data() {
      return {}
    },
    components:{
     //注册侧导航组件
      vSidebar
    },
  }
</script>

import Router from 'vue-router';
Vue.use(Router);
export default new Router(
 {
  routes: [
   {
    path: '/',
    name: 'main', component: main,
    children: [
     {
      path: '/inputDisabled',
      component: resolve => require(['../components/page/input/index.vue'], resolve),
      meta: {title: '禁止输入'},
     },
     {
      path: '/indexSelect',
      component: resolve => require(['../components/page/input/indexSelect.vue'], resolve),
      meta: {title: 'select联动'},
     },
     {
      path: '/loadMoreUp',
      component: resolve => require(['../components/page/loadMore/loadMoreUp.vue'], resolve),
      meta: {title: '下拉刷新'},
     },
    ],
   },
  ]
 })

<template>
 <div class="sidebar">
  <el-menu class="sidebar-el-menu" :default-active="onRoutes" :collapse="collapse" unique-opened router
       collapse-transition>
   <template v-for="item in items" v-cloak>
    <template v-if="item.subset.length!==0">
     <el-submenu :index="item.url" :key="item.url">
      <template slot="title">
       <!--<img :src="item.icon" style="width: 20px;height: 20px"/>-->
       <span slot="title">{{ item.name }}</span>
      </template>
      <el-menu-item v-for="(subItem,i) in item.subset" :key="i" :index="subItem.url">
       <!--<img :src="subItem.icon" style="width: 20px;height: 20px"/>-->
       <span slot="title">{{ subItem.name }}</span>
      </el-menu-item>
     </el-submenu>
    </template>
    <template v-else>
     <el-menu-item :index="item.url" :key="item.url">
      <!--<img :src="item.icon" style="width: 20px;height: 20px"/>-->
      <span slot="title">{{ item.name }}</span>
     </el-menu-item>
    </template>
   </template>
  </el-menu>
 </div>
</template>

<script>
 export default {
  data() {
   return {
    collapse: false,
    items: [{
     name: "elementUI之input",
     url: "",
     subset: [
      {name: "禁止输入", url: "/inputDisabled", subset: []},
      { name: "select联动", url: "/indexSelect", subset: []
     }]
    }, {name: "手机下拉刷新", url: "/loadMoreUp", subset: []}]
   }
  },
  computed: {
   onRoutes() {
    //当前激活菜单的 index
    return this.$route.path.replace('/', '');
   }
  },
 }
</script>