offset-path-with-transforms-001.html

<!DOCTYPE html>
<html class="reftest-wait">
  <head>
    <title>CSS Motion Path: Combined transformation matrix interpolation</title>
    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#ctm">
    <link rel="match" href="offset-path-with-transforms-ref.html">
    <meta name="assert" content="This tests animating combined transformation matrix.">
    <style>
      @keyframes anim {
        to {
          translate: 0px 100px;
          offset-distance: 100%;
          transform: translateX(-100px);
        }
      }
      #target {
        position: absolute;
        width: 100px;
        height: 50px;
        background-color: lime;
        offset-path: path("M25 0v100");
        animation: anim 10s -5s paused linear;
      }
    </style>
  </head>
  <body onload="load()">
    <div id="target"></div>
    <div style='width: 50px; height: 100px; background-color: red;'></div>
  </body>
  <script>
    requestAnimationFrame(() => {
      document.documentElement.classList.remove('reftest-wait');
    });
  </script>
</html>

chromium/third_party/blink/web_tests/external/wpt/css/motion/animation/reftests/offset-path-with-transforms-001.html