// 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);
}