From 602a863d892507c39469f49e706f14081e1944d8 Mon Sep 17 00:00:00 2001
From: Tao Cumplido <taocumplido@gmail.com>
Date: Thu, 24 Nov 2022 19:33:33 +0100
Subject: [PATCH] fix isTreeItem method when called with non-element nodes
 (#1026)

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

diff --git a/src/components/tree-item/tree-item.ts b/src/components/tree-item/tree-item.ts
index 9a7fccbdd..63e0f19c6 100644
--- a/src/components/tree-item/tree-item.ts
+++ b/src/components/tree-item/tree-item.ts
@@ -14,8 +14,8 @@ import '../spinner/spinner';
 import styles from './tree-item.styles';
 import type { CSSResultGroup, PropertyValueMap } from 'lit';
 
-export function isTreeItem(element: Element) {
-  return element && element?.getAttribute('role') === 'treeitem';
+export function isTreeItem(node: Node) {
+  return node instanceof Element && node.getAttribute('role') === 'treeitem';
 }
 
 /**