chromium/third_party/blink/web_tests/http/tests/lazyload/iframe-domparser.html

<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<script>
  test(() => {
    const parser = new DOMParser();
    const parsed_document =
      parser.parseFromString('<iframe loading=lazy ' +
                             'src=https://domfarolino.com></iframe>',
                             'text/html');
  }, 'Creating a loading=lazy iframe from DOMParser does not crash the renderer');
</script>