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vue-router是vue框架中的一个插件。
vue-router实现原理
vue-router通过hash与History interface两种方式实现前端路由，更新页面内容但不重新请求页面”是前端路由原理的核心之一。
使用的具体方法
1.安装vue-router ，npm install vue-router --save
2.导入vue-router
3.通过vue.user() 使用插件
4.创建路由对象
5.导入组件
6.配置URL和组件直接的映射关系
7.导出router对象
index.js
在vue-router中，通过mode参数来决定采用哪一种方式，默认hash。
history 注：如果浏览器不支持history新特性,则采用hash方式
import VueRouter from 'vue-router' import Vue from 'vue' import Home from
'../components/Home' import About from '../components/About' //
通过vue.use(插件)，安装插件 Vue.use(VueRouter) // 创建路由对象 const routes = [{ path: "", //
重定项 redirect: '/home' }, { path: '/home', component: Home }, { path: '/about',
component: About }] const router = new VueRouter({ // 配置URL和组价直接的映射关系 routes,
// history模式 mode: 'history' }) // 将router对象传入到vue实例中 export default router
8.在main.js中导入router对象
import Vue from 'vue' import App from './App' import router from
'./router/index.js' Vue.config.productionTip = false /* eslint-disable no-new
*/ new Vue({ el: '#app', router, render: h => h(App) })
9.在index.html中使用
<template> <div id="app"> <h2>hello world</h2> <router-link
to='home'>首页</router-link> <router-link to='about'>关于</router-link>
<router-view></router-view> </div> </template>
router-view：当路由发生改变时，重新执行render函数。router-view会找到对应的组件进行渲染。
router-link：创建路由链接标签（默认a标签），绑定对应的事件，根据属性执行路由实例不通的方法。
效果：
