使用路由守卫

admin管理员组

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文章目录

• • 全局前置路由守卫
  • 全局后置路由守卫
  • 独享路由守卫
  • 组件内路由守卫

路由守卫，将限制访问路由的权限。
前置路由守卫，每次路由切换前将被调用。
后置路由守卫，每次路由切换后将被调用。
独享路由守卫，由某个路由独享，在路由切换前调用。

全局前置路由守卫

全局前置路由守卫，即router.beforeEach( (to,from,next) => {} )，注意三个参数：to、from和next。

• 一般组件components/Banner.vue

<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>

<style>

</style>

• 路由组件pages/Home.vue

<template>
  <div>
    <h2>Home组件内容</h2>
  </div>
</template>

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

<style>

</style>

• 路由组件pages/About.vue

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

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

<style>

</style>

• 路由器router/index.js

import VueRouter from "vue-router";
import Home from "../pages/Home";
import About from "../pages/About";

const router = new VueRouter({
    routes:[
        {   
            name:"guanyu",
            path:"/about",
            component:About
        },
        {
            name:"zhuye",
            path:"/home",
            component:Home
        }
    ]
})

router.beforeEach((to,from,next) => {
    if(to.name == "zhuye"){
        if(localStorage.getItem("company") === "五哈科技有限公司"){
            next();
        }else{
            alert("公司名不正确！")
        }
    }else{
        next();
    }
})
export default router;

或者也可以这样

import VueRouter from "vue-router";
import Home from "../pages/Home";
import About from "../pages/About";

const router = new VueRouter({
    routes:[
        {   
            path:"/about",
            component:About
        },
        {
            path:"/home",
            component:Home,
            meta:{
                isAuth:true
            }
        }
    ]
})

router.beforeEach((to,from,next) => {
    if(to.meta.isAuth){
        if(localStorage.getItem("company") === "五哈科技有限公司"){
            next();
        }else{
            alert("公司名不正确！")
        }
    }else{
        next();
    }
})
export default router;

• App.vue

<template>
  <div>
    <div class="row">
      <Banner/>
    </div>
    <div class="row">
      <div class="col-xs-2 col-xs-offset-2">
        <div class="list-group">
          <router-link to="/about" active-class="active" class="list-group-item">About</router-link>
          <router-link to="/home" active-class="active" class="list-group-item">Home</router-link>
        </div>
      </div>
      <div class="col-xs-6">
        <div class="panel">
          <div class="panel-body">
            <keep-alive>
              <router-view></router-view>
            </keep-alive>
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import Banner from "./components/Banner.vue";

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

• 入口文件main.js

import Vue from 'vue'
import App from './App.vue'
import VueRouter from "vue-router";

import router from "./router/index";

Vue.config.productionTip = false;

Vue.use(VueRouter);

new Vue({
  render: h => h(App),
  router:router
}).$mount('#app')

• 启动应用，测试效果。
  

全局后置路由守卫

全局后置路由守卫，即router.afterEach( (to,from) => {} )，注意两个参数：to、from。

• 修改路由器router/index.js

import VueRouter from "vue-router";
import Home from "../pages/Home";
import About from "../pages/About";

const router = new VueRouter({
    routes:[
        {   
            path:"/about",
            component:About,
            meta:{
                title:"关于"
            }
        },
        {
            path:"/home",
            component:Home,
            meta:{
                isAuth:true,
                title:"首页"
            }
        }
    ]
})

router.beforeEach((to,from,next) => {
    if(to.meta.isAuth){
        if(localStorage.getItem("company") === "五哈科技有限公司"){
            next();
        }else{
            alert("公司名不正确！")
        }
    }else{
        next();
    }
})

router.afterEach((to,from) => {
    document.title = to.meta.title || "嘎嘎嘎官网";
})
export default router;

• 启动应用，测试效果。
  

独享路由守卫

独享路由守卫，即 beforeEnter( (to,from,next) => {} )，注意三个参数：to、from、next。

• 修改路由器router/index.js

import VueRouter from "vue-router";
import Home from "../pages/Home";
import About from "../pages/About";

const router = new VueRouter({
    routes:[
        {   
            path:"/about",
            component:About,
            meta:{
                title:"关于"
            }
        },
        {
            path:"/home",
            component:Home,
            meta:{
                title:"首页"
            },
            beforeEnter(to,from,next){
                if(localStorage.getItem("company") === "五和科技有限公司"){
                    next();
                }else{
                    alert("公司名不正确！");
                }
            }
        }
    ]
})


router.afterEach((to,from) => {
    document.title = to.meta.title || "嘎嘎嘎官网";
})
export default router;

• 重启应用，测试效果。
  

组件内路由守卫

组件内路由守卫，有
进入路由守卫：beforeRouteEnter(to,from,next){}。根据路由规则，进入组件时调用。
离开路由守卫：beforeRouteLeave(to,from,next){}。根据路由规则，离开组件时调用。

• 修改路由器router/index.js

import VueRouter from "vue-router";
import Home from "../pages/Home";
import About from "../pages/About";

const router = new VueRouter({
    routes:[
        {   
            path:"/about",
            component:About,
            meta:{
                title:"关于"
            }
        },
        {
            path:"/home",
            component:Home,
            meta:{
                title:"首页",
                isAuth:true
            }
        }
    ]
})


router.afterEach((to,from) => {
    document.title = to.meta.title || "嘎嘎嘎官网";
})

export default router;

• 修改路由组件Home.vue

<template>
  <div>
    <h2>Home组件内容</h2>
  </div>
</template>

<script>
export default {
    name:'Home',
    beforeRouteEnter (to, from, next) {
      console.log("Home#beforeRouteEnter");
      if(to.meta.isAuth){
        if(localStorage.getItem("company") === "五哈科技有限公司"){
            next();
        }else{
            alert("公司名不正确！");
        }
      }else{
        next();
      }

    },
    beforeRouteLeave (to, from, next) {
      console.log("Home#beforeRouteLeave");
      next();
    }
}
</script>

<style>

</style>

• 重启应用，测试效果。
  

本文标签： 路由