import { ownerDocument } from "./owner-document";

/**
 * Returns the window that owns `node`, falling back to the ambient `window`
 * global when `node` is null or detached. Use this instead of reading
 * `window` directly so realm-sensitive checks (`node instanceof
 * win.HTMLElement`) work across iframes.
 */
export function ownerWindow(node: Node | null | undefined): Window {
	const doc = ownerDocument(node);
	return doc.defaultView ?? window;
}