From 12e19b82d83b7bf0f93314a5ba7ff9f3b75fa6cf Mon Sep 17 00:00:00 2001
From: 梁灏 <admin@aresn.com>
Date: Tue, 18 Sep 2018 10:55:17 +0800
Subject: [PATCH] fixed #4524

---
 src/components/date-picker/panel/Date/date-range.vue | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/components/date-picker/panel/Date/date-range.vue b/src/components/date-picker/panel/Date/date-range.vue
index 153e8eb..5d636c0 100644
--- a/src/components/date-picker/panel/Date/date-range.vue
+++ b/src/components/date-picker/panel/Date/date-range.vue
@@ -261,7 +261,8 @@
             setPanelDates(leftPanelDate){
                 this.leftPanelDate = leftPanelDate;
                 const rightPanelDate = new Date(leftPanelDate.getFullYear(), leftPanelDate.getMonth() + 1, 1);
-                this.rightPanelDate = this.splitPanels ? new Date(Math.max(this.dates[1].getTime(), rightPanelDate.getTime())) : rightPanelDate;
+                const splitRightPanelDate = this.dates[1]? this.dates[1].getTime() : rightPanelDate.getTime();
+                this.rightPanelDate = this.splitPanels ? new Date(Math.max(splitRightPanelDate, rightPanelDate.getTime())) : rightPanelDate;
             },
             panelLabelConfig (direction) {
                 const locale = this.t('i.locale');
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