Vue Router相关理解

vue-router是vue的一个插件库，专门用来实现SPA应用

SPA应用的理解

单页Web应用（single page web application,SPA）

整个应用只有一个完整的页面

点击页面中的导航链接不会刷新页面，只会做页面的局部刷新

数据需要通过ajax请求获取

路由理解

基本路由

安装vue-router，命令npm i vue-router@3 （后面加@3原因是我使用的是vue2）

应用插件Vue.use(VueRouter)

编写router配置项src/router/index.js

import VueRouter from 'vue/router'          //引入VueRouter
import About from '../components/About'     //引入路由组件
import Home from '../components/Home'       //引入路由组件

//创建router实例对象，去管理一组一组的路由规则
const router=new VueRouter({
    routes:[
        {
            path:'/about',
            component:About
        },
        {
            path:'/home',
            component:Home
        },
    ]  
})

//暴露router
export default router

实现切换<router-link></router-link>浏览器会被替换为a标签 active-class可配置高亮样式

<router-link active-class="active" to="/about">About</router-link>

指示展示位<router-view></router-view>

案例

src/main.js

import Vue from 'vue'
import App from './App.vue'
import VueRouter from 'vue-router'  //引入VueRouter
import router from './router'    //引入路由器
Vue.config.productionTip = false

Vue.use(VueRouter)
//创建vm
new Vue({
    el: '#app',
    render: h => h(App),
    router:router
})

src/router/index.js

import VueRouter from 'vue-router'
// 引入组件
import About from '../components/About'
import Home from '../components/Home'

//创建并暴露一个路由器
export default new VueRouter({
    routes:[
        {
            path:'/about',
            component:About
        },
        {
            path:'/home',
            component:Home
        }
    ]
})

src/App.vue

<template>
    <div>
        <div class="row">
            <div class="col-xs-offset-2 col-xs-8">
                <div class="page-header">
                    <h2>Vue Router Demo</h2>
                </div>
            </div>
        </div>
        <div class="row">
            <div class="col-xs-2 col-xs-offset-2">
                <div class="list-group">
                    <!-- <a class="list-group-item active" href="./about.html">About</a> -->
                    <!-- <a class="list-group-item" href="./home.html">Home</a> -->

                    <!-- Vue中借助router-link标签实现路由的切换 -->
                    <router-link class="list-group-item" active-class="active" to="/about">About</router-link>
                    <router-link class="list-group-item" active-class="active" to="/home">Home</router-link>
                </div>
            </div>
            <div class="col-xs-6">
                <div class="panel">
                    <div class="panel-body">
                        <!-- 指定组件呈现的位置 -->
                        <router-view></router-view>
                    </div>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
export default {
    name: 'App'
}
</script>

src/components/About.vue

<template>
  <h2>我是About的内容</h2>
</template>

<script>
export default {
  name: 'About',
}
</script>

src/components/Home.vue

<template>
    <h2>我是Home的内容</h2>
  </template>
  
  <script>
  export default {
    name: 'Home',
  }
  </script>

public/index.html

<!DOCTYPE html>
<html lang="">
  <head>
    <meta charset="utf-8">
    <!-- 针对IE浏览器的一个特殊配置，含义是让IE浏览器以最高的渲染级别渲染页面 -->
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <!-- 开启移动端的理想视口 -->
    <meta name="viewport" content="width=device-width,initial-scale=1.0">
    <!-- 配置页签图标 -->
    <link rel="icon" href="<%= BASE_URL %>favicon.ico">
    <!-- 引入第三方样式 -->
    <link rel="stylesheet" href="<%= BASE_URL %>css/bootstrap.css">
    <!-- 配置网页标题 -->
    <title><%= htmlWebpackPlugin.options.title %></title>
  </head>
  <body>
    <!-- 当浏览器不支持js时noscript中的元素就会被渲染 -->
    <noscript>
      <strong>We're sorry but <%= htmlWebpackPlugin.options.title %> doesn't work properly without JavaScript enabled. Please enable it to continue.</strong>
    </noscript>
    <!-- 容器 -->
    <div id="app"></div>
    <!-- built files will be auto injected -->
  </body>
</html>

注意事项

import VueRouter from 'vue-router'
// 引入组件
import About from '../pages/About'
import Home from '../pages/Home'

//创建并暴露一个路由器
export default new VueRouter({
    routes:[
        {
            path:'/about',
            component:About
        },
        {
            path:'/home',
            component:Home
        }
    ]
})

<template>
    <div class="col-xs-offset-2 col-xs-8">
        <div class="page-header">
            <h2>Vue Router Demo</h2>
        </div>
    </div>
</template>

<script>
export default {
    name: 'Banner',
}
</script>

<template>
    <div>
        <div class="row">
            <Banner/>
        </div>
        <div class="row">
            <div class="col-xs-2 col-xs-offset-2">
                <div class="list-group">
                    <!-- <a class="list-group-item active" href="./about.html">About</a> -->
                    <!-- <a class="list-group-item" href="./home.html">Home</a> -->

                    <!-- Vue中借助router-link标签实现路由的切换 -->
                    <router-link class="list-group-item" active-class="active" to="/about">About</router-link>
                    <router-link class="list-group-item" active-class="active" to="/home">Home</router-link>
                </div>
            </div>
            <div class="col-xs-6">
                <div class="panel">
                    <div class="panel-body">
                        <!-- 指定组件呈现的位置 -->
                        <router-view></router-view>
                    </div>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
import Banner from './components/Banner'
export default {
    name: 'App',
    components:{Banner}
}
</script>

多级路由

src/pages/Home.vue

<template>
  <div>
    <h2>Home组件内容</h2>
    <div>
      <ul class="nav nav-tabs">
        <li>
          <router-link class="list-group-item" active-class="active" to="/home/news">News</router-link>
        </li>
        <li>
          <router-link class="list-group-item" active-class="active" to="/home/message">Message</router-link>
        </li>
      </ul>
      <router-view></router-view>
    </div>
  </div>
</template>
  
<script>
export default {
  name: 'Home',
}
</script>

src/pages/News.vue

<template>
  <ul>
    <li>news001</li>
    <li>news002</li>
    <li>news003</li>
  </ul>
</template>

<script>
export default {
  name: 'News',
}
</script>

src/pages/Message.vue

<template>
    <ul>
        <li>
            <a href="/message1">message001</a>&nbsp;&nbsp;
        </li>
        <li>
            <a href="/message2">message002</a>&nbsp;&nbsp;
        </li>
        <li>
            <a href="/message3">message003</a>&nbsp;&nbsp;
        </li>
    </ul>
</template>

<script>
export default {
    name: 'Message',
}
</script>