chromium/third_party/blink/web_tests/external/wpt/css/css-pseudo/highlight-cascade/highlight-currentcolor-painting-text-shadow-001.html

<!DOCTYPE html><meta charset="utf-8">
<title>CSS Pseudo-Elements Test: Custom Highlights currentcolor painting single layer</title>
<meta name="assert" content="Checks the painting for highlight pseudos (using ::highlight), when ‘text-shadow’ contains a shadow with ‘currentColor’ (and ‘color’ is also ‘currentColor’, via implicit defaulting up to the root). The color of the text shadow should equal the originating element ‘color’.">
<link rel="author" title="Delan Azabani" href="mailto:[email protected]">
<link rel="help" href="https://drafts.csswg.org/css-pseudo/#highlight-text">
<link rel="match" href="highlight-currentcolor-painting-text-shadow-001-ref.html">
<link rel="stylesheet" href="../support/highlights.css">
<style>
div {
  color: lime;
  background: green;
  margin: 10px;
}
::highlight(textshadow-currentcolor) {
  text-shadow: currentcolor 2px 2px;
}
</style>

<div id="textshadow-currentcolor" class="highlight_reftest">example - textshadow-currentcolor</div>

<script>
  function range(node, start, end) {
    let range = new Range();
    range.setStart(node, start);
    range.setEnd(node, end);
    return range;
  }

  const divs = document.getElementsByTagName("div");
  for (let div of divs) {
    CSS.highlights.set(div.id, new Highlight(range(div.firstChild, 0, 7)));
  }
</script>