From 5c7cde1b8c3b5e7ae2e41ed20f1842411ab89a14 Mon Sep 17 00:00:00 2001
From: msidolphin <OoMass-EffectoO@hotmail.com>
Date: Fri, 17 Jan 2020 12:20:07 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E4=BF=AE=E5=A4=8Dbug=20#6404?=
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---
 examples/routers/date.vue                           |  4 +++-
 .../date-picker/panel/Date/date-range.vue           | 13 ++++++++++---
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/examples/routers/date.vue b/examples/routers/date.vue
index ff7a2b8e..2076b7f0 100644
--- a/examples/routers/date.vue
+++ b/examples/routers/date.vue
@@ -250,7 +250,7 @@
 <template>
     <div style="width: 500px;margin: 100px;">
         <p><input type="text"></p>
-
+        
         <DatePicker type="month" show-week-numbers placeholder="Select date" style="width: 200px"></DatePicker>
         <DatePicker type="year" show-week-numbers placeholder="Select date" style="width: 200px"></DatePicker>
 
@@ -260,6 +260,8 @@
         <DatePicker type="daterange" transfer show-week-numbers placeholder="Select date" style="width: 400px"></DatePicker>
         <DatePicker type="datetimerange" transfer show-week-numbers placeholder="Select date" style="width: 400px"></DatePicker>
         <Time-Picker :steps="[1, 1, 15]" :value="new Date()"></Time-Picker>
+
+        <DatePicker type="daterange" split-panels placeholder="Select date" style="width: 200px"></DatePicker>
     </div>
 </template>
 <script>
diff --git a/src/components/date-picker/panel/Date/date-range.vue b/src/components/date-picker/panel/Date/date-range.vue
index 07bbdef4..cbb18b16 100644
--- a/src/components/date-picker/panel/Date/date-range.vue
+++ b/src/components/date-picker/panel/Date/date-range.vue
@@ -296,11 +296,18 @@
             },
             changePanelDate(panel, type, increment, updateOtherPanel = true){
                 const current = new Date(this[`${panel}PanelDate`]);
-                if (panel === 'left') {
-                    current[`set${type}`](current[`get${type}`](), 0);
-                } else {
+                
+                if (this.splitPanels) {
+                    // fix #6404
                     current[`set${type}`](current[`get${type}`]() + increment);
+                } else {
+                    if (panel === 'left') {
+                        current[`set${type}`](current[`get${type}`]() + increment);
+                    } else {
+                        current[`set${type}`](current[`get${type}`]() + increment);
+                    }
                 }
+
                 this[`${panel}PanelDate`] = current;
 
                 if (!updateOtherPanel) return;