/*
 * Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 * for details. All rights reserved. Use of this source code is governed by a
 * BSD-style license that can be found in the LICENSE file.
 */
/**
 * @assertion WindowBase get contentWindow
 * @description Checks that the property is of type WindowBase.
 * @issue #16937
 */
import "dart:html";
import "../../../Utils/expect.dart";

main() {
  IFrameElement ife = new IFrameElement();
  document.body?.append(ife);
  WindowBase? nw = ife.contentWindow;
  Expect.isNotNull(nw);
}