From 1a997c2c1b47719e3f5054cc6d72b1230b045b54 Mon Sep 17 00:00:00 2001
From: VTHINKXIE <vthinkxie@users.noreply.github.com>
Date: Sat, 23 Sep 2017 00:14:55 +0800
Subject: [PATCH] feat(module:select): support undefined reset select (#363)

close #284
---
 src/components/select/nz-select.component.ts | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/components/select/nz-select.component.ts b/src/components/select/nz-select.component.ts
index 4b81a2db895..ce99dc08a2c 100644
--- a/src/components/select/nz-select.component.ts
+++ b/src/components/select/nz-select.component.ts
@@ -458,12 +458,12 @@ export class NzSelectComponent implements OnInit, AfterContentInit, AfterContent
 
   /** update selected option when add remove option etc */
   updateSelectedOption(currentModelValue, triggerByNgModel = false) {
-    if (currentModelValue === null || currentModelValue === undefined) {
+    if (currentModelValue == null) {
       return;
     }
     if (this.nzMultiple) {
       const selectedOptions = this._options.filter((item) => {
-        return ((item !== null) && (item !== undefined)) && (currentModelValue.indexOf(item.nzValue) !== -1);
+        return (item != null) && (currentModelValue.indexOf(item.nzValue) !== -1);
       });
       if ((this.nzKeepUnListOptions || this.nzTags) && (!triggerByNgModel)) {
         selectedOptions.forEach(option => {
@@ -480,7 +480,7 @@ export class NzSelectComponent implements OnInit, AfterContentInit, AfterContent
 
     } else {
       const selectedOption = this._options.filter((item) => {
-        return (item !== null) && (item.nzValue === currentModelValue);
+        return (item != null) && (item.nzValue === currentModelValue);
       });
       this.chooseOption(selectedOption[ 0 ]);
     }
@@ -721,13 +721,13 @@ export class NzSelectComponent implements OnInit, AfterContentInit, AfterContent
     if (this._value === value) {
       return;
     }
-    if ((value === null) && this.nzMultiple) {
+    if ((value == null) && this.nzMultiple) {
       this._value = [];
     } else {
       this._value = value;
     }
     if (!this.nzMultiple) {
-      if (value === null) {
+      if (value == null) {
         this._selectedOption = null;
       } else {
         this.updateSelectedOption(value);
@@ -739,7 +739,7 @@ export class NzSelectComponent implements OnInit, AfterContentInit, AfterContent
         } else {
           this.updateSelectedOption(value, true);
         }
-      } else if (value === null) {
+      } else if (value == null) {
         this.clearAllSelectedOption(emitChange);
       }
     }