diff --git a/2019/12/vue-router.md b/2019/12/vue-router.md
index 46c7019..5513e5f 100644
--- a/2019/12/vue-router.md
+++ b/2019/12/vue-router.md
@@ -191,5 +191,18 @@ export default {
 （1） 在	main.js中的 导出模块里 通过watch 监听 $route 对象
 
 ```
+new Vue({
+  el: '#app',
+  router,
+  watch:{
+    '$route'(){
+       window.console.log("aaa")
+    }
+ },
+  render: h => h(App)
+})
 
-```
\ No newline at end of file
+
+```
+
+(2) 定义route.beforeEach
\ No newline at end of file