From 91abf0bea186f7933985dacd851e21d3046806b7 Mon Sep 17 00:00:00 2001
From: Catouse <catouse@gmail.com>
Date: Fri, 16 Aug 2019 14:23:15 +0800
Subject: [PATCH]  * fix $selectField undefinde error in chosen.

---
 src/js/chosen.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/js/chosen.js b/src/js/chosen.js
index c3b951a9c..f64ed0c7c 100644
--- a/src/js/chosen.js
+++ b/src/js/chosen.js
@@ -302,7 +302,8 @@ MIT License, https://github.com/harvesthq/chosen/blob/master/LICENSE.md
                 var sortValues;
                 if(this.sort_field && this.is_multiple) {
                     $selectField = $(this.sort_field);
-                    sortValues = $selectField.val().split(this.sort_value_spliter);
+                    var sortFieldValue = $selectField.val();
+                    sortValues = (typeof sortFieldValue === 'string' && sortFieldValue.length) ? sortFieldValue.split(this.sort_value_spliter) : [];
                     if(sortValues.length) {
                         var sortValuesMap = {};
                         for(_i = 0; _i < sortValues.length; ++_i) {
-- 
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