custom-highlight-painting-invalidation-004.html

<!DOCTYPE html>
<html class="reftest-wait">
<meta charset="UTF-8">
<title>CSS Highlight API Test: </title>
<link rel="help" href="https://drafts.csswg.org/css-highlight-api-1/">
<link rel="match" href="custom-highlight-painting-001-ref.html">
<meta name="assert" value="::highlight overlay is correctly invalidated and repainted after adding a range to it">
<script src="resources/run-after-layout-and-paint.js"></script>
<style>
  ::highlight(example-highlight) {
    background-color: yellow;
    color: blue;
  }
</style>
<body><span>One </span><span>two </span><span>three…</span>
<script>
  let r = new Range();
  r.setStart(document.body, 0);
  r.setEnd(document.body, 2);
  let h = new Highlight();
  CSS.highlights.set("example-highlight", h);

  // Force frame paint before modifying the Highlight.
  runAfterLayoutAndPaint(()=>{
    h.add(r);
    document.documentElement.removeAttribute("class");
  });
</script>
</html>

chromium/third_party/blink/web_tests/external/wpt/css/css-highlight-api/painting/custom-highlight-painting-invalidation-004.html