diff --git a/assets/avsdev/js/sidebar.js b/assets/avsdev/js/sidebar.js
index a763fee..549b574 100644
--- a/assets/avsdev/js/sidebar.js
+++ b/assets/avsdev/js/sidebar.js
@@ -3,18 +3,18 @@ $(document).ready(function() {
     $('[data-toggle="tooltip"]').tooltip();
     $('.sidebar-menu .collapse, .sidebar-menu .collapsing').on('hide.bs.collapse', function() {
         $(this).prev().find('.fa').eq(1).removeClass('fa-angle-right').addClass('fa-angle-down');
-        var states = JSON.parse(localStorage.getItem('sidebar-states') || {});
+        var states = JSON.parse(localStorage.getItem('sidebar-states')) || {};
         states[this.id] = 0;
         localStorage.setItem('sidebar-states', JSON.stringify(states));
     });
     $('.sidebar-menu .collapse, sidebar-menu .collapsing').on('show.bs.collapse', function() {
         $(this).prev().find('.fa').eq(1).removeClass('fa-angle-down').addClass('fa-angle-right');
-        var states = JSON.parse(localStorage.getItem('sidebar-states') || {});
+        var states = JSON.parse(localStorage.getItem('sidebar-states')) || {};
         states[this.id] = 1;
         localStorage.setItem('sidebar-states', JSON.stringify(states));
     });
 
-    var states = JSON.parse(localStorage.getItem('sidebar-states') || {});
+    var states = JSON.parse(localStorage.getItem('sidebar-states')) || {};
     Object.getOwnPropertyNames(states).forEach((elid) => {
         if (states[elid] === 1) {
             $('#' + elid).collapse('show');