vue路由进阶

一..全局路由前置守卫

1.首先看一下文档结构

 

 Dashboard和Login是一级页面  home about mine是在Dashboard下的二级页面

2.router.js代码如下

import Vue from 'vue'
import Router from 'vue-router'
// 一级界面
import Login from './views/Login'
import DashBoard from './views/DashBoard'
// 二级界面
import Home from './views/Home'
import Mine from './views/Mine'
const About = ()=> import('./views/About');
Vue.use(Router);
const router = new Router({
    routes: [
        { path: '/', redirect: '/dashboard' },
        {
            path: '/dashboard',
            name: 'dashboard',
            component: DashBoard,
            children: [
                { path: '/dashboard', redirect: '/dashboard/home' },
                {path: 'home', name: 'home', component: Home,},
                {path: 'about', name: 'about', component: About},
                {path: 'mine', name: 'mine', component: Mine}
            ],
        },
        {path: '/login', name: 'login', component: Login}
    ]
});
// 全局路由前置守卫
router.beforeEach((to, from, next)=>{
    // console.log(to, from);
    if(to.path !== '/login'){ // 验证是否登录
        if(window.isLogin){ // 已经登录 window.isLogin是自己自定义的一个全局变量 登录是 点击一下就是变为true
            next();
        }else { // 没有登录
             next('/login?redirect='+ to.path);
            // next('/login?redirect=/dashboard/mine');
            //next('/login');
        }
    }else { // 不需要验证
        next();
    }
    // 放行
    next();
});

// 全局路由后置守卫
router.afterEach((to, from) => {
   // console.log('来了！');
});
//把router作为实例输出出去
export default router;

 login.vue里面的代码

点击按钮window.isLogin = true就登录跳转,这里只是做了一个模拟登录

<template>
    <div>
        <h2>登录界面</h2>
        <button @click="login">登录</button>
    </div>
</template>

<script>
    export default {
        name: "Login",
        methods: {
            login(){
                // 1. 登录成功
                window.isLogin = true;
                // 2. 获取回调地址
                const redirect = this.$route.query.redirect;
                if(redirect){ // 有回调地址
                    this.$router.push(redirect);
                }else { // 没有回调地址
                    // 去首页
                    this.$router.replace('/');
                }
            }
        }
    }
</script>

<style scoped>

</style>