vue路由守卫用于登录验证权限拦截
vue路由守卫 - 全局（router.beforeEach((to, from, next) =>来判断登录和路由跳转状态）
主要方法：
to：进入到哪个路由去
from：从哪个路由离开
next：路由的控制参数，常用的有next(true)和next(false)
首先判断进入的是否是login页面？然后再判断是否已经登陆？
已经登陆了就进入你要跳转的页面，没登录就进入login页面
router路由设置
index.js
import Vue from 'vue'
import VueRouter from 'vue-router'
import HomeView from '../views/HomeView.vue'
Vue.use(VueRouter)
const originalPush = VueRouter.prototype.push
VueRouter.prototype.push = function push(location) {
return originalPush.call(this, location).catch(err => err)
}
const routes = [
{
path: '/',
name: 'login',
component: ()=>import('../views/Login/LoginView.vue')
},
{
path: '/register',
name: '注册',
component: ()=>import('../views/Register/RegisterView.vue')
},
{
path: '/index',
name: 'index',
component: ()=>import('../views/Index/Index.vue'),
// redirect:'/manage',
children:[
{
path: '/manage',
name: '图书管理',
component: ()=>import('../views/Manage/Manage.vue')
},
]
},
{
path: '/about',
name: 'about',
// route level code-splitting
// this generates a separate chunk (about.[hash].js) for this route
// which is lazy-loaded when the route is visited.
component: () => import(/* webpackChunkName: "about" */ '../views/AboutView.vue')
}
]
const router = new VueRouter({
routes
});
router.beforeEach((to, from, next) => {
const isLogin = window.localStorage.getItem('main'); //获取本地存储的登陆信息
console.log(isLogin)
console.log("to:"+to.name) //进入到哪个路由去
console.log("from:"+from) //从哪个路由离开
//next：路由的控制参数，常用的有next(true)和next(false)
//next() 直接进to 所指路由
//next('route') 跳转指定路由
if (to.name == 'login') { //判断是否进入的login页
if (isLogin) { //判断是否登陆
next({ name: 'index' }); //已登录，跳转首页
} else {
next(); //没登录，继续进入login页
}
} else { //如果进入的非login页
if (isLogin) { //同样判断是否登陆
next(); //已登录，正常进入当前页面
} else {
next({ name: 'login'}); //没登录，跳转到login页
}
}
});
export default router
