From cbfd9cfab358cbd10146ec8238da4b11aabfe594 Mon Sep 17 00:00:00 2001
From: Leopoldthecoder <Leopoldthecuber@gmail.com>
Date: Thu, 9 Nov 2017 15:12:16 +0800
Subject: [PATCH] Menu: fix console error

---
 packages/menu/src/submenu.vue | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/packages/menu/src/submenu.vue b/packages/menu/src/submenu.vue
index b4adc7fcc..8cf59b572 100644
--- a/packages/menu/src/submenu.vue
+++ b/packages/menu/src/submenu.vue
@@ -173,11 +173,13 @@
       },
       handleTitleMouseenter() {
         if (this.mode === 'horizontal' && !this.rootMenu.backgroundColor) return;
-        this.$refs['submenu-title'].style.backgroundColor = this.rootMenu.hoverBackground;
+        const title = this.$refs['submenu-title'];
+        title && (title.style.backgroundColor = this.rootMenu.hoverBackground);
       },
       handleTitleMouseleave() {
         if (this.mode === 'horizontal' && !this.rootMenu.backgroundColor) return;
-        this.$refs['submenu-title'].style.backgroundColor = this.rootMenu.backgroundColor || '';
+        const title = this.$refs['submenu-title'];
+        title && (title.style.backgroundColor = this.rootMenu.backgroundColor || '');
       }
     },
     created() {