diff --git a/2019/12/vue-router.md b/2019/12/vue-router.md
index 2d02b6a..a06fb2d 100644
--- a/2019/12/vue-router.md
+++ b/2019/12/vue-router.md
@@ -254,4 +254,6 @@ const routes= [
 在组件内的 导出模块中声明
 beforeRouteEnter，beforeRouteUpdate，beforeRouteLeave
 
-beforeRouterEnter: 进入该组件的
\ No newline at end of file
+beforeRouterEnter: 进入该组件的时候调用
+beforeRouteUPdate :路由改变呢重用组件的时候调用
+beforeRouteLeave ： 
\ No newline at end of file