chromium/third_party/blink/web_tests/external/wpt/css/css-masking/clip-path/clip-path-filter-order-ref.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>Clip-path should be applied after filtering</title>
<link rel="author" title="Philip Rogers" href="mailto:[email protected]">

<div>
  <p>Expected: A green box.<br>
  There should be no red visible.<br>
  There should be a crisp, clipped edge around the green box (no blurring).</p>
</div>

<style>
  #testcase {
    position: absolute;
    width: 200px;
    height: 200px;
    background: green;
    will-change: transform;
  }
</style>
<div id="testcase"></div>