From cedd335da8cfa48314040b45f012faae62134b2e Mon Sep 17 00:00:00 2001
From: "Patrick H. Lauke" <redux@splintered.co.uk>
Date: Thu, 29 Dec 2022 12:50:43 +0000
Subject: [PATCH] Add guard rail to dropdown keyhandler

---
 js/src/dropdown.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/js/src/dropdown.js b/js/src/dropdown.js
index 6b7c0cef30..1795de7c2a 100644
--- a/js/src/dropdown.js
+++ b/js/src/dropdown.js
@@ -416,6 +416,10 @@ class Dropdown extends BaseComponent {
         SelectorEngine.next(this, SELECTOR_DATA_TOGGLE)[0] ||
         SelectorEngine.findOne(SELECTOR_DATA_TOGGLE, event.delegateTarget.parentNode))
 
+    if (getToggleButton === null) {
+      return
+    }
+
     const instance = Dropdown.getOrCreateInstance(getToggleButton)
 
     if (isUpOrDownEvent) {
-- 
2.47.2