clip-path-shape-interpolation-001.html

<!DOCTYPE html>
<html class="reftest-wait">
<head>
  <title>CSS Masking: Test clip-path nonzero path interpolation</title>
  <link rel="help" href="https://drafts.csswg.org/css-shapes-2/#funcdef-shape">
  <link rel="match" href="clip-path-path-interpolation-001-ref.html">
  <meta name="assert" content="The clip-path property takes the basic shape
	'shape()' for clipping. Test the interpolation of nonzero
        path function.">
  <style>
    @keyframes anim {
      from {
        clip-path: shape(nonzero from 20px 20px,
          hline by 60px, vline by 60px, hline by -60%, close,
          move to 30% 30px, hline by 40px, vline by 40px, hline by -40px, close);
      }
      to {
        clip-path: shape(nonzero from 50px 50px,
          hline by 50px, vline by 50px, hline by -50%, close,
          move to 20px 20%, hline by 50px, vline by 50px, hline by -50px, close);
      }
    }
    #rect {
      width: 100px;
      height: 100px;
      background-color: green;
      animation: anim 10s -5s paused linear;
    }
  </style>
</head>
<body>
  <div id="rect"></div>
</body>
<script>
  requestAnimationFrame(() => {
    document.documentElement.classList.remove('reftest-wait');
  });
</script>
</html>

chromium/third_party/blink/web_tests/external/wpt/css/css-masking/clip-path/animations/clip-path-shape-interpolation-001.html