导航守卫执行顺序
- 全局前置守卫 beforeEach
- 路由独享守卫 beforeEnter
- 组件路由守卫 beforeRouteEnter 此时this并不指向this，可通过回调获取
- 全局解析守卫 beforeResolve
- 全局后置守卫 afterEach
- 组件生命周期 beforeCreate
- created
- beforeMount
- mounted
- 组件路由守卫 beforeRouteEnter的next回调
全局导航钩子
全局导航分为两种，前置守卫beforeEach和后置守卫afterEach
- const router = new VueRouter({...})
- router.beforeEach((to, from, next) => {...})
- router.afterEach(同上)
路由独享钩子
beforeEnter
组件内的导航钩子
beforeRouteEnter、beforeRouteUpdate、beforeRouteLeave
