chromium/third_party/blink/web_tests/external/wpt/css/css-masking/clip-path/animations/clip-path-animation-cancel.html

<!DOCTYPE html>
<html class="reftest-wait">
<link rel="help" href="https://drafts.csswg.org/css-shapes-1/#basic-shape-interpolation">
<link rel="match" href="clip-path-animation-cancel-ref.html">
<style>
  /* This test ensures that canceling an animation properly results in a
     repaint. If this does not happen, the animation will remain stuck until
     invalidated for another reason. */
  .container {
    width: 100px;
    height: 100px;
    background-color: green;
    animation: clippath 10s;
    clip-path: circle(20% at 20% 20%);
  }

  @keyframes clippath {
    0% {
      clip-path: circle(35% at 35% 35%);
    }

    100% {
      clip-path: circle(50% at 50% 50%);
    }
  }
</style>
<script src="/common/reftest-wait.js"></script>
<script src="/web-animations/resources/timing-utils.js"></script>

<body>
  <div class="container"></div>

  <script>
    document.getAnimations()[0].ready.then(() => {
      document.getAnimations()[0].cancel();
      requestAnimationFrame(takeScreenshot);
    });
  </script>
</body>

</html>