clip-path-rect-interpolation-001.html

<!DOCTYPE html>
<html class="reftest-wait">
<head>
  <title>CSS Masking: Test clip-path rect() interpolation</title>
  <link rel="help" href="https://drafts.csswg.org/css-shapes-1/#funcdef-basic-shape-rect">
  <link rel="match" href="clip-path-xywh-interpolation-001-ref.html">
  <meta name="assert" content="The clip-path property takes the basic shape
	'rect()' for clipping. Test the interpolation of xywh function.">
  <style>
    @keyframes anim {
      from {
        clip-path: rect(0px 100px 100% 0px round 10px);
      }
      to {
        clip-path: rect(20px 80px calc(20px + 60%) 20px round 20px);
      }
    }
    #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-rect-interpolation-001.html