From 3d7d4980a939d78c2b9738ff04d9ba5e5fc89899 Mon Sep 17 00:00:00 2001
From: c0hb1rd <cohbird.zn@gmail.com>
Date: Sun, 28 Jan 2018 15:20:22 +0800
Subject: [PATCH] DateTimePicker: fix invalid month value bug for Firefox 37
 (#9501)

* DateTimePicker: fix invalid month value for Firefox 37

* Update date-range.vue
---
 packages/date-picker/src/panel/date-range.vue | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/date-picker/src/panel/date-range.vue b/packages/date-picker/src/panel/date-range.vue
index b163757b7..a9d2de696 100644
--- a/packages/date-picker/src/panel/date-range.vue
+++ b/packages/date-picker/src/panel/date-range.vue
@@ -301,7 +301,7 @@
       enableMonthArrow() {
         const nextMonth = (this.leftMonth + 1) % 12;
         const yearOffset = this.leftMonth + 1 >= 12 ? 1 : 0;
-        return this.unlinkPanels && new Date(`${this.leftYear + yearOffset}-${nextMonth + 1}`) < new Date(`${this.rightYear}-${this.rightMonth + 1}`);
+        return this.unlinkPanels && new Date(this.leftYear + yearOffset, nextMonth) < new Date(this.rightYear, this.rightMonth);
       },
 
       enableYearArrow() {