From 8893045bf145a051fb37ff47375d193bb14f7e72 Mon Sep 17 00:00:00 2001
From: bolte-17 <3034257+bolte-17@users.noreply.github.com>
Date: Thu, 27 Oct 2022 09:28:35 -0400
Subject: [PATCH] Avoid null dereference when removing event listeners in
 Dropdown (#958)

---
 src/components/dropdown/dropdown.ts | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/components/dropdown/dropdown.ts b/src/components/dropdown/dropdown.ts
index aa5c2a40..17ff2bd2 100644
--- a/src/components/dropdown/dropdown.ts
+++ b/src/components/dropdown/dropdown.ts
@@ -346,8 +346,10 @@ export default class SlDropdown extends ShoelaceElement {
   }
 
   removeOpenListeners() {
-    this.panel.removeEventListener('sl-activate', this.handleMenuItemActivate);
-    this.panel.removeEventListener('sl-select', this.handlePanelSelect);
+    if (this.panel) {
+      this.panel.removeEventListener('sl-activate', this.handleMenuItemActivate);
+      this.panel.removeEventListener('sl-select', this.handlePanelSelect);
+    }
     document.removeEventListener('keydown', this.handleDocumentKeyDown);
     document.removeEventListener('mousedown', this.handleDocumentMouseDown);
   }