css/motion/change-offset-path.html

<!DOCTYPE html>
<html class="reftest-wait">
<title>Change offset-path property</title>
<link rel="author" title="Philip Rogers" href="mailto:pdr@chromium.org">
<link rel="help" href="https://crbug.com/1365255">
<link rel="match" href="../reference/ref-filled-green-100px-square-only.html">
<style>
#target {
  will-change: transform;
  transform: translate(50px, 50px);
  offset-path: path('M 0 0 L 200 200 Z');
  width: 100px;
  height: 100px;
  background: green;
}
#container {
  width: 100px;
  height: 100px;
  background: red;
}
</style>
<p>Test passes if there is a filled green square.</p>
<div id="container">
  <div id="target"></div>
</div>
<script>
requestAnimationFrame(() => {
  requestAnimationFrame(() => {
    target.style.offsetPath = 'path(\'M 0 0 Z\')';
    document.documentElement.removeAttribute('class');
  });
});
</script>