iframe-initially-empty-is-updated.html

<!DOCTYPE html>
<html class="reftest-wait">
<title>Iframe that doesn't load can be updated and rendered.</title>
<meta charset="utf-8">
<link rel="match" href="iframe-initially-empty-is-updated-ref.html"/>
<html>
  <body>
    <iframe src="resources/empty.html"></iframe>
    <script>
      window[0].document.body.appendChild(document.createElement('div'))
          .appendChild(document.createTextNode('Hello world!'));
      window[0].document.body.firstChild.style = 'color: green';
      window.stop();
      requestAnimationFrame(() => {
        requestAnimationFrame(() => {
          document.documentElement.classList.remove("reftest-wait");
        });
      });
    </script>
  </body>
</html>

chromium/third_party/blink/web_tests/external/wpt/html/semantics/embedded-content/the-iframe-element/iframe-initially-empty-is-updated.html