diff --git a/2019/12/vue-router.md b/2019/12/vue-router.md
index 8b03d2c..db875a7 100644
--- a/2019/12/vue-router.md
+++ b/2019/12/vue-router.md
@@ -208,6 +208,8 @@ new Vue({
 (2) 定义route.beforeEach
 
 ```
-router.before	
+router.beforeEach((to,from,next)=>{
+
+})
 
 ```
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