diff --git a/2019/12/vue-router.md b/2019/12/vue-router.md
index d9a461e..43a4982 100644
--- a/2019/12/vue-router.md
+++ b/2019/12/vue-router.md
@@ -262,6 +262,17 @@ beforeRouteUPdate :路由改变呢重用组件的时候调用
 
 beforeRouteLeave ： 离开该组件的时候调用
 
-eg
+eg:
+
+```
+export default {
+  name: 'aa',
+   beforeRouteEnter (to, from, next) {
+    window.console.log("组件里的")
+    next()
+  },
+}
+
+```