// 路由数组
const routes = [
 {
  path: '/',
  name: 'Page1',
  component: Page1,
 },
 {
  path: '/page2',
  name: 'Page2',
  component: Page2,
 },
]

const router = new VueRouter({
 mode: 'history', // 模式
 routes,
})

<p>
 <!-- 使用 router-link 组件来导航. -->
 <!-- 通过传入 `to` 属性指定链接. -->
 <!-- <router-link> 默认会被渲染成一个 `<a>` 标签 -->
 <router-link to="/page1">Go to Foo</router-link>
 <router-link to="/page2">Go to Bar</router-link>
</p>
<!-- 路由出口 -->
<!-- 路由匹配到的组件将渲染在这里 -->
<router-view></router-view>

let Vue = null

class VueRouter {
 constructor(options) {
  this.mode = options.mode || 'hash'
  this.routes = options.routes || []
 }
}

VueRouter.install = function (_Vue) {
 Vue = _Vue

 Vue.mixin({
  beforeCreate() {
   // 根组件
   if (this.$options && this.$options.router) {
    this._root = this // 把当前vue实例保存到_root上
    this._router = this.$options.router // 把router的实例挂载在_router上
   } else if (this.$parent && this.$parent._root) {
    // 子组件的话就去继承父组件的实例，让所有组件共享一个router实例
    this._root = this.$parent && this.$parent._root
   }
  },
 })

 Vue.component('router-link', {
  props: {
   to: {
    type: [String, Object],
    required: true,
   },
   tag: {
    type: String,
    default: 'a', // router-link 默认渲染成 a 标签
   },
  },
  render(h) {
   let tag = this.tag || 'a'
   return <tag href={this.to}>{this.$slots.default}</tag>
  },
 })

 Vue.component('router-view', {
  render(h) {
   return h('h1', {}, '视图显示的地方') // 暂时置为h1标签，下面会改
  },
 })
}

export default VueRouter

let Vue = null

class HistoryRoute {
 constructor() {
  this.current = null // 当前路径
 }
}

class VueRouter {
 constructor(options) {
  this.mode = options.mode || 'hash'
  this.routes = options.routes || []
  this.routesMap = this.createMap(this.routes)
  this.history = new HistoryRoute() // 当前路由
  this.initRoute() // 初始化路由函数
 }

 createMap(routes) {
  return routes.reduce((pre, current) => {
   pre[current.path] = current.component
   return pre
  }, {})
 }

 initRoute() {
  if (this.mode === 'hash') {
   // 先判断用户打开时有没有hash值，没有的话跳转到 #/
   location.hash "htmlcode">

VueRouter.install = function (_Vue) {
 Vue = _Vue

 Vue.component('router-link', {
  props: {
   to: {
    type: [String, Object],
    required: true,
   },
   tag: {
    type: String,
    default: 'a',
   },
  },
  methods: {
   handleClick(event) {
    // 阻止a标签默认跳转
    event && event.preventDefault && event.preventDefault()
    let mode = this._self._root._router.mode
    let path = this.to
    this._self._root._router.history.current = path
    if (mode === 'hash') {
     window.history.pushState(null, '', '#/' + path.slice(1))
    } else {
     window.history.pushState(null, '', path.slice(1))
    }
   },
  },
  render(h) {
   let mode = this._self._root._router.mode
   let tag = this.tag || 'a'
   let to = mode === 'hash' "htmlcode">

let Vue = null

class HistoryRoute {
 constructor() {
  this.current = null
 }
}

class VueRouter {
 constructor(options) {
  this.mode = options.mode || 'hash'
  this.routes = options.routes || []
  this.routesMap = this.createMap(this.routes)
  this.history = new HistoryRoute() // 当前路由
  // 初始化路由函数
  this.initRoute()
 }

 createMap(routes) {
  return routes.reduce((pre, current) => {
   pre[current.path] = current.component
   return pre
  }, {})
 }

 initRoute() {
  if (this.mode === 'hash') {
   // 先判断用户打开时有没有hash值，没有的话跳转到 #/
   location.hash "_blank" href="https://github.com/Jacky-Summer/personal-blog" rel="external nofollow" >个人技术博文 Github 仓库，觉得不错的话欢迎 star，给我一点鼓励继续写作吧~

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