зарефакторил скрипт в шаблоне левого меню

bitrix/templates/aspro-scorp/components/bitrix/menu/side_menu_multilevel/template.php

 <?if (!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED!==true)die();?>
 
 <?if (!empty($arResult)):?>
-<ul id="side_menu_multilevel">
+    <ul id="side_menu_multilevel">
 
-<?
-$previousLevel = 0;
-foreach($arResult as $arItem):?>
+    <?
+    $previousLevel = 0;
+    foreach($arResult as $arItem):?>
 
         <?if ($previousLevel && $arItem["DEPTH_LEVEL"] < $previousLevel):?>
             <?=str_repeat("</ul></li>", ($previousLevel - $arItem["DEPTH_LEVEL"]));?>
@@ -46,39 +46,30 @@ foreach($arResult as $arItem):?>
 
         <?$previousLevel = $arItem["DEPTH_LEVEL"];?>
 
-<?endforeach?>
+    <?endforeach?>
 
-<?if ($previousLevel > 1)://close last item tags?>
+    <?if ($previousLevel > 1)://close last item tags?>
         <?=str_repeat("</ul></li>", ($previousLevel-1) );?>
-<?endif?>
+    <?endif?>
 
-</ul>
+    </ul>
 <?endif?>
 <script>
-    $(document).ready(function() {
-    if ($("#side_menu_multilevel li").is(".item-selected"))  {$("#side_menu_multilevel li.root-item-selected").addClass("hide_selection")}  
-    //$("#side_menu_multilevel li.item-selected").parent('#side_menu_multilevel').find("li.root-item-selected").addClass("hide_selection");
-    //console.log("!!!!!!!!!!111234!!!!!!!!!!!!!"+$("#side_menu_multilevel li.item-selected").parent('#side_menu_multilevel'));
-        
-    $('#side_menu_multilevel li.root-item a span.roll-out').click(
-           function(){ 
-               if($(this).parent('a').next('ul').is('.root-item'))
-               {
-                $(this).parent('a').parent().toggleClass("opened");
-                $(this).parent('a').next("ul.root-item").toggle(150);
-                return false;
-               }
-           }
-           );    
-    $('#side_menu_multilevel li.root-item-selected a span.roll-out').click(
-           function(){ 
-               if($(this).parent('a').next('ul').is('.root-item'))
+$(document).ready(function() {
+    const $menu = $("#side_menu_multilevel");
+    if ($("li", $menu).is(".item-selected"))  {$("li.root-item-selected", $menu).addClass("hide_selection")}
+
+    const clickHandler = function(){
+        const $a = $(this).parent('a');
+        if($a.next('ul').is('.root-item'))
         {
-                $(this).parent('a').parent().toggleClass("opened");
-                $(this).parent('a').next("ul.root-item").toggle(150);
+            $a.parent().toggleClass("opened");
+            $a.next("ul.root-item").toggle(150);
             return false;
         }
-           }
-           );    
-    });                                
+    };
+
+    $('li.root-item a span.roll-out', $menu).click( clickHandler );
+    $('li.root-item-selected a span.roll-out', $menu).click( clickHandler );
+});
 </script>