Vue路由router详解

npm install Vue-router

//index.js
import VueRouter from 'vue-router'
import Vue from 'vue'
import Home from "../views/Home";
Vue.use(VueRouter)//注册路由插件
export default  new VueRouter({
    routes:[{
        path:'/',
        component:Home
    }]
})

//main.js
import Vue from 'vue'
import App from './App.vue'
import store from '@/store'
import router from '@/router'//这里就是引入了我们创建好的路由对象。模块化的编程思维
Vue.config.productionTip = false
Vue.prototype.bus = new Vue()
new Vue({
  store,
  router,
  render: h => h(App),
}).$mount('#app')

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

 <router-link to="/">Go to home</router-link>

 <router-link :to="{path:'/'}">go to home</router-link>

 <router-link :to="{name:'home'}">go to home</router-link>

// 字符串
router.push('home')
// 对象
router.push({ path: 'home' })
// 命名的路由
router.push({ name: 'user', params: { userId: '123' }})
// 带查询参数，变成 /reGISter?plan=private
router.push({ path: 'register', query: { plan: 'private' }})

const userId = '123'
router.push({ name: 'user', params: { userId }}) // -> /user/123
router.push({ path: `/user/${userId}` }) // -> /user/123
// 这里的 params 不生效
router.push({ path: '/user', params: { userId }}) // -> /user

 {
        path:'/user/:id',
        component:User
        name:user
    }

 <router-link to="/user/01">go to home</router-link>

 <router-link :to="{path:'/user/01'}">go to home</router-link>

 <router-link :to="{name:'/user',params={id:'01'}}">go to home</router-link>

{
  // 会匹配所有路径
  path: '*'
}
{
  // 会匹配以 `/user-` 开头的任意路径
  path: '/user-*'
}

<router-link to=“/user?name=zhangsan">...</router-link>
<router-link :to="{path:'/user?zhangsan'}">...</router-link>
<router-link :to="{path:'/user',query:{name:'zhangsan'}}">...</router-link>
<router-link :to="{name:'user',query:{name:'zhangsan'}}">...</router-link>

<router-link to=“/user?name=zhangsan">...</router-link>
<router-link :to="{path:'/user?zhangsan'}">...</router-link>
<router-link :to="{path:'/user',query:{name:'zhangsan'}}">...</router-link>
<router-link :to="{name:'user',query:{name:'zhangsan'}}">...</router-link>

const User = {
  template: '...',
  watch: {
    $route(to, from) {
      // 对路由变化作出响应...
    }
  }
}

const User = {
  template: '...',
  beforeRouteUpdate(to, from, next) {
    // React to route changes...
    // don't forget to call next()
  }
}

{
        path: '/pageOne',
        component:PageOne,
        alias:"/firstPage",
        name:"pageOne",
        redirect:{name:'pageTwo'}
    },
    {
        path: '/pageTwo',
        component:PageTwo,
        name:'pageTwo'
    }

routes: [
    {
      path: '/user/:userId',
      name: 'user',
      component: User
    }
  ]

const router = new VueRouter({
  routes: [
    { path: '/a', component: A, alias: '/b' }
  ]
})

const router = new VueRouter({
  routes: [
    { path: '/a', redirect: '/b' }
  ]
})

const router = new VueRouter({
  routes: [
    { path: '/a', redirect: { name: 'foo' }}
  ]
})

const router = new VueRouter({
  routes: [
    { path: '/a', redirect: to => {
      // 方法接收 目标路由 作为参数
      // return 重定向的 字符串路径/路径对象
    }}
  ]
})

 {
      path: '/user',
      component: User,
      children: [
        {
          // 当 /user//profile 匹配成功，
          // UserProfile 会被渲染在 User 的 <router-view> 中
          path: 'profile',
          component: UserProfile
        },
        {
          // 当 /user//posts 匹配成功
          // UserPosts 会被渲染在 User 的 <router-view> 中
          path: 'posts',
          component: UserPosts
        }
      ]
    }

<div id="app">
  <router-view></router-view>
</div>

const User = {
  template: `
    <div class="user">
      <span>User组件</span>
      <router-view></router-view>
    </div>
  `
}

{
        path:"/namingRoute",
        components:{//注意此处components是带's'结尾的，之前单个的时候是不带的。
            default:Home,
            one:PageOne,
            two:PageTwo
        }
    }

 	<router-view></router-view>//渲染default对应的组件
    <router-view name="one"></router-view>//渲染one对应的组件
    <router-view name="two"></router-view>//渲染two对应的组件

beforeEach((to,from,next)=>{
	//...
})

router.beforeResolve((to, from, next) => {
  // ...
})

router.afterEach((to, from) => {
  // ...
})

使用的位置：通常在router文件夹下的index.js
const router = new VueRouter({ ... })
//全局前置守卫
router.beforeEach((to, from, next) => {
  // ...
})
//全局解析守卫
router.beforeResolve((to, from, next) => {
  // ...
})
//全局后置钩子
router.afterEach((to, from) => {
  // ...
})

const User = {
  template: `...`,
  beforeRouteEnter(to, from, next) {
    // 在渲染该组件的对应路由被 confirm 前调用
    // 不！能！获取组件实例 `this`
    // 因为当守卫执行前，组件实例还没被创建
  }
}

beforeRouteEnter (to, from, next) {
  next(vm => {
    // 通过 `vm` 访问组件实例
  })
}

const User = {
  template: `...`,
  beforeRouteUpdate(to, from, next) {
    // 在当前路由改变，但是该组件被复用时调用
    // 举例来说，对于一个带有动态参数的路径 /foo/:id，在 /foo/1 和 /foo/2 之间跳转的时候，
    // 由于会渲染同样的 Foo 组件，因此组件实例会被复用。而这个钩子就会在这个情况下被调用。
    // 可以访问组件实例 `this`
  }
}

const User = {
  template: `...`,
  beforeRouteLeave(to, from, next) {
    // 导航离开该组件的对应路由时调用
    // 可以访问组件实例 `this`
  }
}