From 3ec7e6d0456b3b0146373af8ea315bd30ed18c59 Mon Sep 17 00:00:00 2001
From: Valerij Ivashchenko <likemusic@yandex.ru>
Date: Tue, 12 Jun 2018 10:57:28 +0300
Subject: [PATCH] improve params string creation according to @orlangur
 suggestion

---
 .../Block/Widget/Form/Element/Dependence.php        | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/app/code/Magento/Backend/Block/Widget/Form/Element/Dependence.php b/app/code/Magento/Backend/Block/Widget/Form/Element/Dependence.php
index 3d9575dfaa8a0..632b5c0ff6ad2 100644
--- a/app/code/Magento/Backend/Block/Widget/Form/Element/Dependence.php
+++ b/app/code/Magento/Backend/Block/Widget/Form/Element/Dependence.php
@@ -121,14 +121,15 @@ protected function _toHtml()
             return '';
         }
 
-        $dependsJson = $this->_getDependsJson();
-        $configOptions = $this->_configOptions ? $this->_jsonEncoder->encode($this->_configOptions) : null;
-        $configOptionsStr = $configOptions ? ', ' . $configOptions : '';
-        $paramsStr = $dependsJson . $configOptionsStr;
+        $params = $this->_getDependsJson();
+
+        if ($this->_configOptions) {
+            $params .= ', ' .  $this->_jsonEncoder->encode($this->_configOptions);
+        }
 
         return "<script>
-    require(['mage/adminhtml/form'], function(){
-    new FormElementDependenceController({$paramsStr});
+require(['mage/adminhtml/form'], function(){
+    new FormElementDependenceController({$params});
 });
 </script>";
     }