diff --git a/app/code/Magento/Rule/view/adminhtml/web/rules.js b/app/code/Magento/Rule/view/adminhtml/web/rules.js
index 202337c39da35..95175d272f9af 100644
--- a/app/code/Magento/Rule/view/adminhtml/web/rules.js
+++ b/app/code/Magento/Rule/view/adminhtml/web/rules.js
@@ -13,6 +13,7 @@ define([
     'mage/translate',
     'prototype'
 ], function (jQuery) {
+    'use strict';
 
     var VarienRulesForm = new Class.create();
 
@@ -125,7 +126,7 @@ define([
                 var values = this.updateElement.value.split(','),
  s = '';
 
-                for (i = 0; i < values.length; i++) {
+                for (var i = 0; i < values.length; i++) {
                     s = values[i].strip();
 
                     if (s != '') {
@@ -254,7 +255,7 @@ define([
                 if (elem && elem.options) {
                     var selectedOptions = [];
 
-                    for (i = 0; i < elem.options.length; i++) {
+                    for (var i = 0; i < elem.options.length; i++) {
                         if (elem.options[i].selected) {
                             selectedOptions.push(elem.options[i].text);
                         }
@@ -299,14 +300,14 @@ define([
         },
 
         changeVisibilityForValueRuleParam: function(elem) {
-            let parsedElementId = elem.id.split('__');
-            if (parsedElementId[2] != 'operator') {
+            var parsedElementId = elem.id.split('__');
+            if (parsedElementId[2] !== 'operator') {
                 return false;
             }
 
-            let valueElement = jQuery('#' + parsedElementId[0] + '__' + parsedElementId[1] + '__value');
+            var valueElement = jQuery('#' + parsedElementId[0] + '__' + parsedElementId[1] + '__value');
 
-            if(elem.value == '<=>') {
+            if(elem.value === '<=>') {
                 valueElement.closest('.rule-param').hide();
             } else {
                 valueElement.closest('.rule-param').show();