From 12d4345a419e06a7edeb2effec7c98c36c907029 Mon Sep 17 00:00:00 2001
From: squidfunk <martin.donath@squidfunk.com>
Date: Sun, 21 Jul 2024 08:27:01 +0200
Subject: [PATCH] Fix console error when closing dropdown

---
 mkdocs/themes/mkdocs/js/base.js | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/mkdocs/themes/mkdocs/js/base.js b/mkdocs/themes/mkdocs/js/base.js
index 3caa3b95..2f1ef5bb 100644
--- a/mkdocs/themes/mkdocs/js/base.js
+++ b/mkdocs/themes/mkdocs/js/base.js
@@ -118,8 +118,14 @@ document.addEventListener("DOMContentLoaded", function () {
         item.classList.remove('open');
 
         popup.scrollTop = 0;
-        popup.querySelector('.dropdown-menu').scrollTop = 0;
-        popup.querySelector('.dropdown-submenu > a').classList.remove('open');
+        var menu = popup.querySelector('.dropdown-menu');
+        if (menu) {
+            menu.scrollTop = 0;
+        }
+        var dropdown = popup.querySelector('.dropdown-submenu > a');
+        if (dropdown) {
+            dropdown.classList.remove('open');
+        }
     }
 
     document.querySelectorAll('.dropdown-submenu > a').forEach(function(item) {