react-native-devtools-frontend/test/e2e/resources/memory/detached-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>
  const frame = document.createElement('iframe');
  frame.src = 'data:text/html,<script>class Leak{}; var x = new Leak();<'+
                    '/script>';
  document.body.appendChild(frame);
  frame.addEventListener("load", function() {
    const iframeWindow  = this.contentWindow;
    const retainingListener = () => {
      // This is leaking the iframe.
      console.log(iframeWindow);
    }
    document.body.addEventListener('click', retainingListener, true);
    document.body.removeChild(this);
  });
</script>