test/e2e/resources/memory/attached-iframe.html

<!--
  Copyright 2020 The Chromium Authors. All rights reserved.
  Use of this source code is governed by a BSD-style license that can be
  found in the LICENSE file.
-->
<h1>Memory Panel (Heap profiler) Test</h1>
<script>
  var frame = document.createElement('iframe');
  frame.src = 'data:text/html,<script>class Retainer{}; var aUniqueName = new Retainer();<'+
                    '/script>';
  document.body.appendChild(frame);
  frame.addEventListener("load", function() {
    var iframeWindow  = this.contentWindow;
    function retainingListener() {
      // This is leaking the iframe.
      console.log(iframeWindow);
    }
    document.body.addEventListener('click', retainingListener, true);
  });
</script>