DatePicker: input event is not fired when the array value is not updated, fixed #1834

packages/date-picker/src/panel/date-range.vue

@@ -293,7 +293,7 @@
       handleClear() {
         this.minDate = null;
         this.maxDate = null;
-        this.handleConfirm();
+        this.handleConfirm(false);
       },
 
       handleDateInput(event, type) {
@@ -376,10 +376,8 @@
         this.maxDate = val.maxDate;
         this.minDate = val.minDate;
 
-        if (!close) return;
-        if (!this.showTime) {
-          this.$emit('pick', [this.minDate, this.maxDate]);
-        }
+        if (!close || this.showTime) return;
+        this.handleConfirm();
       },
 
       changeToToday() {
@@ -456,7 +454,7 @@
         this.resetDate();
       },
 
-      handleConfirm(visible) {
+      handleConfirm(visible = false) {
         this.$emit('pick', [this.minDate, this.maxDate], visible);
       },
 

packages/date-picker/src/panel/date.vue

@@ -189,7 +189,7 @@
     methods: {
       handleClear() {
         this.date = new Date();
-        this.$emit('pick', '');
+        this.$emit('pick');
       },
 
       resetDate() {

packages/date-picker/src/panel/time-select.vue

@@ -85,7 +85,7 @@
       },
 
       handleClear() {
-        this.$emit('pick', '');
+        this.$emit('pick');
       }
     },
 

packages/date-picker/src/panel/time.vue

@@ -104,7 +104,7 @@
 
     methods: {
       handleClear() {
-        this.$emit('pick', '');
+        this.$emit('pick');
       },
 
       handleCancel() {

packages/date-picker/src/picker.vue

@@ -26,7 +26,7 @@
 <script>
 import Vue from 'vue';
 import Clickoutside from 'element-ui/src/utils/clickoutside';
-import { formatDate, parseDate, getWeekNumber } from './util';
+import { formatDate, parseDate, getWeekNumber, equalDate } from './util';
 import Popper from 'element-ui/src/utils/vue-popper';
 import Emitter from 'element-ui/src/mixins/emitter';
 import ElInput from 'element-ui/packages/input';
@@ -304,10 +304,13 @@ export default {
 
           if (parsedValue && this.picker) {
             this.picker.value = parsedValue;
+          } else {
+            this.$forceUpdate();
           }
-          return;
+        } else {
+          this.picker.value = value;
+          this.$forceUpdate();
         }
-        this.picker.value = value;
       }
     }
   },
@@ -335,10 +338,25 @@ export default {
         this.pickerVisible = !this.pickerVisible;
       } else {
         this.internalValue = '';
-        this.$emit('input', '');
       }
     },
 
+    dateIsUpdated(date) {
+      let updated = true;
+
+      if (Array.isArray(date)) {
+        if (equalDate(this.cacheDateMin, date[0]) &&
+          equalDate(this.cacheDateMax, date[1])) updated = false;
+        this.cacheDateMin = date[0];
+        this.cacheDateMax = date[1];
+      } else {
+        if (equalDate(this.cacheDate, date)) updated = false;
+        this.cacheDate = date;
+      }
+
+      return updated;
+    },
+
     handleClose() {
       this.pickerVisible = false;
     },
@@ -418,7 +436,7 @@ export default {
 
         this.picker.$on('dodestroy', this.doDestroy);
         this.picker.$on('pick', (date, visible = false) => {
-          this.$emit('input', date);
+          if (this.dateIsUpdated(date)) this.$emit('input', date);
           this.pickerVisible = this.picker.visible = visible;
           this.picker.resetView && this.picker.resetView();
         });

packages/date-picker/src/util/index.js

@@ -8,6 +8,10 @@ const newArray = function(start, end) {
   return result;
 };
 
+export const equalDate = function(dateA, dateB) {
+  return new Date(dateA).getTime() === new Date(dateB).getTime();
+};
+
 export const toDate = function(date) {
   date = new Date(date);
   if (isNaN(date.getTime())) return null;