capricorn86#558@patch: Additional TreeWalker checks for parentNode.

maxmilton · Aug 7, 2022 · a67971a · a67971a
1 parent f7c8a89
commit a67971a
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/packages/happy-dom/src/tree-walker/TreeWalker.ts b/packages/happy-dom/src/tree-walker/TreeWalker.ts
@@ -125,7 +125,7 @@ export default class TreeWalker {
 	 * @returns Current node.
 	 */
 	public previousSibling(): INode {
-		if (this.currentNode !== this.root && this.currentNode) {
+		if (this.currentNode !== this.root && this.currentNode && this.currentNode.parentNode) {
 			const siblings = this.currentNode.parentNode.childNodes;
 			const index = siblings.indexOf(this.currentNode);
 
@@ -149,7 +149,7 @@ export default class TreeWalker {
 	 * @returns Current node.
 	 */
 	public nextSibling(): INode {
-		if (this.currentNode !== this.root && this.currentNode) {
+		if (this.currentNode !== this.root && this.currentNode && this.currentNode.parentNode) {
 			const siblings = this.currentNode.parentNode.childNodes;
 			const index = siblings.indexOf(this.currentNode);