marquee-element-move-and-toggle-visibility-crash.html

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Moving a marquee element and toggle the visibility state should not
         crash</title>
</head>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<body>
  <marquee id="target">Don't crash me</marquee>
  <div id="container" style = "display: none;"></div>
</body>
<script>
  test(function() {
    const target = document.getElementById('target');
    const container = document.getElementById('container');
    requestAnimationFrame(() => {
      requestAnimationFrame(() => {
        // Removing the element pauses the animation in Blink.
        target.parentElement.removeChild(target);
        requestAnimationFrame(() => {
          // Reattaching the element resumes the animation regardless of
          // visibility.
          container.appendChild(target);
          requestAnimationFrame(() => {
             container.style = "display: block";
          });
        });
      });
    });
  }, 'Check that toggling visibility of a moved marquee element does not crash');
</script>
</html>

chromium/third_party/blink/web_tests/animations/stability/marquee-element-move-and-toggle-visibility-crash.html