chromium/third_party/blink/web_tests/external/wpt/html/semantics/document-metadata/the-link-element/link-multiple-load-events.html

<!DOCTYPE html>
<link rel="author" title="Dom Farolino" href="mailto:[email protected]">
<link rel="help" href="https://html.spec.whatwg.org/multipage/#the-link-element">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<link id=style_link rel=stylesheet>
<script>
  async_test(t => {
    const link = document.querySelector('#style_link');
    link.onerror = t.unreached_func('Sheet should load successfully');
    link.onload = t.step_func(() => {
      link.onload = t.step_func_done(() => {});
      link.href = 'style.css?second';
    });

    link.href = 'style.css?first';

  }, "Check if the <link>'s load event fires for each stylesheet it loads");
  </script>
</head>
</html>