fix: check parentNode exists before removing child

src/runtime/internal/dom.ts

@@ -203,7 +203,9 @@ export function insert_hydration(target: NodeEx, node: NodeEx, anchor?: NodeEx)
 }
 
 export function detach(node: Node) {
+	if (node.parentNode){
 		node.parentNode.removeChild(node);
+	}
 }
 
 export function destroy_each(iterations, detaching) {