diff --git a/django/contrib/admin/static/admin/js/nav_sidebar.js b/django/contrib/admin/static/admin/js/nav_sidebar.js
index 9b558ca2e7..70685f2c06 100644
--- a/django/contrib/admin/static/admin/js/nav_sidebar.js
+++ b/django/contrib/admin/static/admin/js/nav_sidebar.js
@@ -10,7 +10,7 @@
         main.classList.toggle('shifted', navSidebarIsOpen === 'true');
 
         toggleNavSidebar.addEventListener('click', function() {
-            if (navSidebarIsOpen == 'true') {
+            if (navSidebarIsOpen === 'true') {
                 navSidebarIsOpen = 'false';
             } else {
                 navSidebarIsOpen = 'true';