diff --git a/2019/12/vue-router.md b/2019/12/vue-router.md
index 0b2fbd7..efb1ec1 100644
--- a/2019/12/vue-router.md
+++ b/2019/12/vue-router.md
@@ -215,4 +215,6 @@ router.beforeEach((to,from,next)=>{
 
 ```
 
-to:
\ No newline at end of file
+to:即将进入的页面信息
+
+from 当前正要离开的页面信息