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chromium/third_party/blink/web_tests/external/wpt/css/css-highlight-api/painting/custom-highlight-painting-013.html 

<!DOCTYPE html>
<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 is repainted correctly after modifying text content of a node included in a Range contained in it">
<style>
  ::highlight(example-highlight) {
    background-color: yellow;
    color: blue;
  }
</style>
<body><span id="first">One </span><span id="second">two-point-five </span><span id="third">three…</span>
<script>
  let r = new Range();
  r.setStart(document.querySelector("#first").firstChild, 0);
  r.setEnd(document.querySelector("#third").firstChild, 0);
  CSS.highlights.set("example-highlight", new Highlight(r));
  document.querySelector("#second").firstChild.textContent = "two ";
</script>