1、我们继续上一个案例 vue -- 路由精讲制作导航 -- 从无到有 ，在 about文件夹下 创建一些文件夹。如下：2、编写about.vue代码。当我们点击导航中 “关于我们” ，就会显示该部分内容。代码中写了四个可供点击后可以跳转的模块。和 表示你点击了哪个组件，哪个组件就会渲染到这里来。其中注意：css样式,我们直接引入bootstrap中的导航的样式，在标签中直接添加class属性的值就可以了。about.vue代码

3、配置二级路由和三级路由注意：我们要在about页面下添加四个路由，用到 children 属性, 而且还用到 redirect 属性，默认跳转到指定路由，具体操作看代码和注释。main.js代码
import Vue from 'vue'
import VueRouter from 'vue-router'
import App from './App.vue'
import Home from './components/Home.vue'
import Menu from './components/Menu.vue'
import Admin from './components/Admin.vue'
import About from './components/about/About.vue'
import Login from './components/Login.vue'
import Register from './components/Register.vue'

//二级路由
import Contact from './components/about/Contact.vue'
import Delivery from './components/about/Delivery.vue'
import History from './components/about/History.vue'
import OrderingGuide from './components/about/OrderingGuide.vue'

//三级路由
import Phone from './components/about/contact/Phone.vue'
import PersonName from './components/about/contact/PersonName.vue'

import Vue from 'vue'
import VueRouter from 'vue-router'
import App from './App.vue'
import Home from './components/Home.vue'
import Menu from './components/Menu.vue'
import Admin from './components/Admin.vue'
import About from './components/about/About.vue'
import Login from './components/Login.vue'
import Register from './components/Register.vue'

//二级路由
import Contact from './components/about/Contact.vue'
import Delivery from './components/about/Delivery.vue'
import History from './components/about/History.vue'
import OrderingGuide from './components/about/OrderingGuide.vue'

//三级路由
import Phone from './components/about/contact/Phone.vue'
import PersonName from './components/about/contact/PersonName.vue'
Vue.use(VueRouter)核心代码 二级路由和三级路由的跳转
const routes = [

{path:'/',
name:'homeLink',
component:Home},

{path:'/menu', name:'menuLink',
component:Menu},

{path:'/admin', name:'adminLink', component:Admin},

{path:'/about', name:'aboutLink', redirect:'/about/contact', component:About, children:[


//表示about页面中默认跳转到/about/contact 这个路由页面下。

{path:'/about/contact', name:'contactLink', redirect:'/personName', component:Contact, children:[

//在/about/contact页面中默认展现三级路由personName 的内容。

{path:'/phone', name:"phoneNumber", component:Phone},

{path:'/personName', name:"personName", component:PersonName},

]},

{path:'/history',name:'historyLink',component:History},

{path:'/delivery',name:'deliveryLink',component:Delivery},

{path:'/orderingGuide',name:'orderingGuideLink',component:OrderingGuide},

]},

{path:'/login', name:'loginLink', component:Login},

{path:'/register', name:'registerLink', component:Register},

// {path:'*',redirect:'/'},
]

const router = new VueRouter({

routes,

mode:'history'
})

new Vue({
el: '#app',
router,
render: h => h(App)
})

const routes = [

{path:'/',
name:'homeLink',
component:Home},

{path:'/menu', name:'menuLink',
component:Menu},

{path:'/admin', name:'adminLink', component:Admin},

{path:'/about', name:'aboutLink', redirect:'/about/contact', component:About, children:[


//表示about页面中默认跳转到/about/contact 这个路由页面下。

{path:'/about/contact', name:'contactLink', redirect:'/personName', component:Contact, children:[

//在/about/contact页面中默认展现三级路由personName 的内容。

{path:'/phone', name:"phoneNumber", component:Phone},

{path:'/personName', name:"personName", component:PersonName},

]},

{path:'/history',name:'historyLink',component:History},

{path:'/delivery',name:'deliveryLink',component:Delivery},

{path:'/orderingGuide',name:'orderingGuideLink',component:OrderingGuide},

]},

{path:'/login', name:'loginLink', component:Login},

{path:'/register', name:'registerLink', component:Register},

// {path:'*',redirect:'/'},
]

const router = new VueRouter({

routes,

mode:'history'
})

new Vue({
el: '#app',
router,
render: h => h(App)
})
Contact.vue代码



Delivery.vue代码

History.vue代码

OrderingGuide.vue代码

Phone.vue代码

PersonName.vue代码

补充知识：vue：菜单收缩功能补充知识：补充知识：vue：菜单收缩功能想要实现：点击菜单能收缩。（效果如下：）点击前：点击后：思路： 思路： 思路： 首先我们要知道绅缩的按钮和菜单是否在一个页面。在一个页面就简单了。如果不在一个页面，就会涉级到父子级传参，绅缩按钮模块中要把状态传给header，这是兄弟间的传递参数，需要用到 vuex。如果不用vuex的话，就通过主体去操作。绅缩按钮把状态传给主体是子传父，通过 this.$emit()。主体把状态传给菜单，是父传子，通过props ，菜单中需要接收主体中传过来的东西，要在 data 中定义props 在里面定义type、required、default。如果不清楚props 是啥，请百度。操作：1、先看整体布局1、先看整体布局2、menu 模块2、menu 模块3、header 模块 3、header 模块 以上这篇vue-路由精讲 二级路由和三级路由的作用就是小编分享给大家的全部内容了，希望能给大家一个参考。