Vue 路由

一 ：路由
路由：vue-router
是Vue的工具库 vue-router.js
下载：
npm install vue 下载vue
npm install vue-router 下载vue-router

   通过不同的url访问不同的页面
   spa(single page application) 单页面应用

路由：vue-router
vue的插件
下载：
npm install vue-router
作用：
根据不同的url访问不同的页面
创建单页面应用 SPA(single page application)

例：

<div id='app'>
       <router-link to='/home'>首页</router-link>
       <router-link to='/detail'>详情页</router-link>
       <!-- 盛放每个页面对应的内容-->
       <router-view></router-view>
   </div>
    <script src='js/vue.js'></script>
    <script src='js/vue-router.js'></script>
    <script>
        //2.创建组件
        var Home={
            template:`
                <h1>这是首页</h1>
            `
        }
        var Detail={
             template:`
                <h1>这是详情页</h1>
            `
        }
        //3.配置路由
        const routes=[
            {path:'/home',component:Home},
            {path:'/detail',component:Detail}
        ]
        //4.创建一个路由实例
        const router=new VueRouter({
            routes:routes
        })
        //把路由挂在到vue实例上
       new Vue({
           el:'#app',
           router:router
       })
    </script>

路由的嵌套：

<div id='app'>
      <router-link to='/home'>首页</router-link>
      <router-link to='/user'>用户页</router-link>
  
      <router-view></router-view>
  </div>
   <script src='js/vue.js'></script> 
   <script src='js/vue-router.js'></script>
   <script>
       //2.
       var Home={
            template:`<h1>这是首页</h1>`
       }
       var User={
           template:`
                <div>
                    <h1>这是用户页</h1>
                    <ul>
                        <li>
                            <router-link to='/user/regist'>注册</router-link>
                        </li>
                        <li>
                            <router-link to='/user/login'>登录</router-link>
                        </li>
                    </ul>
                    <router-view></router-view>
                </div>
            `
       }
   
       var Regist={
           template:`<h3>这是注册页面</h3>`
       }
   
        var Login={
           template:`<h3>这是登录页面</h3>`
       }
   
       //3.
       const routes=[
           {path:'/',component:Home},
           {path:'/home',component:Home},
           {
               path:'/user',
               component:User,
               children:[
                   {path:'regist',component:Regist},
                   {path:'login',component:Login}
               ]
           }
       ]
   
       //4.
       const router=new VueRouter({
           routes:routes
       })
   
       //5.
       new Vue({
           el:'#app',
           router:router
       })
      </script>

路由的传参：
1.查询字符串
/user/regist?name=jack&age=18
接收：{{route.params}}

<div id='app'>
      <router-link to='/home'>首页</router-link>
      <router-link to='/user'>用户页</router-link>
  
      <router-view></router-view>
  </div>
   <script src='js/vue.js'></script> 
   <script src='js/vue-router.js'></script>
   <script>
       //2.
       var Home={
           template:`<h1>这是首页</h1>`
       }
   
       var  User={
           template:`
             <div>
                 <h1>这是用户页</h1>
                 <ul>
                     <li>
                        <router-link to='/user/regist?uname=jack&&age=18'>注册</router-link>
                     </li>
                      <li>
                        <router-link to='/user/login/alice/20'>登录</router-link>
                     </li>
                 </ul>
                 <router-view></router-view>
             </div>
           `
       }
   
       var Regist={
           template:`
             <div>
                <h3>这是注册页面</h3>
                 <a href=''>{{$route.query}}</a>
                 <ul>
                    <li>{{$route.query.uname}}</li>
                    <li>{{$route.query.age}}</li>
                 </ul>
            </div>
             `
       }
   
        var Login={
           template:`
              <div>
                <h3>这是登录页面</h3>
                <p>{{$route.params}}</p>
                <ul>
                    <li>{{$route.params.userName}}</li>
                    <li>{{$route.params.userage}}</li>
                 </ul>
              </div>
            `
       }
   
       //3.
       const routes=[
           {path:'/',component:Home},
           {path:'/home',component:Home},
           {
               path:'/user',
               component:User,
               children:[
                   {path:'regist',component:Regist},
                   {path:'login/:userName/:userage',component:Login}  
               ]
           }
       ]
   
       //4.
       const router=new VueRouter({
           routes:routes
       })
   
       //5.
       new Vue({
           el:'#app',
           router:router
       })
    </script>

二。 生命周期

<div id='app'>{{msg}}</div>
   <script src='js/vue.js'></script> 
   <script>
       new Vue({
           el:'#app',
           data:{
               msg:'hello vue'
           },
           beforeCreate:function(){
               alert('beforeCreate')
           },
           created:function(){
               alert('Created')
           },
           beforeMount:function(){
               alert('befroeMounted')
           },
           mounted:function(){
               alert('mounted')
           }
       })
    </script>