Vue的守卫

全局守卫
1.router.beforeEach((to,from,next) => {
----------,
next();
})
2.router.afterEach((to,from) => {
----------,
})

路由独享守卫
1.const router = new Router({
routes: [
{
path:'news',
component: () => import('../components/news'),
beforeEnter: (to,from,next) => {
----------
},
beforeUpdate:---
beforeLeave:-----
}]
})