* add special case for portals handling

Author: deadem

compat/src/portals.js

@@ -39,7 +39,7 @@ function Portal(props) {
 			nodeType: 1,
 			parentNode: container,
 			childNodes: [],
-			contains: () => true,
+			isPortal: true,
 			// Technically this isn't needed
 			appendChild(child) {
 				this.childNodes.push(child);

src/util.js

@@ -35,6 +35,8 @@ export function removeNode(node) {
  * @param {import('./index').ContainerNode} node - The node to check for containment within the `parent` subtree.
  */
 export function contains(parent, node) {
+	if ('isPortal' in parent) return true;
+
 	while (node) {
 		if (node === parent) return true;
 		node = node.parentNode;