chromium/third_party/blink/web_tests/external/wpt/css/css-backgrounds/background-clip/clip-text-dynamic-2.html

<!doctype html>
<html class="reftest-wait">
<title>CSS Test: background-clip: text is invalidated properly on text position changes</title>
<link rel="help" href="https://drafts.csswg.org/css-backgrounds-4/#valdef-background-clip-text">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1525372">
<link rel="author" href="mailto:[email protected]" title="Matt Woodrow">
<link rel="author" href="https://mozilla.org" title="Mozilla">
<link rel="match" href="clip-text-dynamic-2-ref.html">
<style>
  .text {
    background-color: blue;
    color: transparent;
    font: 50px/1 monospace;
    background-clip: text;
    height: 200px;
  }
  .prev {
    height: 10px;
  }
  p {
    color: transparent;
  }
</style>
<div class="text">
  <div class="prev"></div>
  <div class="inner">
    <p>XxX</p>
  </div>
</div>
<script>
onload = () => {
  requestAnimationFrame(() => {
    requestAnimationFrame(() => {
      document.querySelector(".prev").style.height = "100px";
      document.documentElement.className = "";
    })
  })
}
</script>