custom-highlight-font-metrics-001-ref.html

<!DOCTYPE html>
<meta charset="UTF-8">
<title>CSS Highlight API Test: </title>
<head>
  <style>
    div {
      margin: 50px;
      font-size: 40px;
      text-underline-offset: 0.5em;
      text-decoration-line: underline;
      text-decoration-color: green;
      text-decoration-thickness: 0.25rem;
    }
    #h2 {
      font-size: 20px;
    }
  </style>
</head>
<body>
  <div id="h1">Font relative units with 40px font</div>
  <div id="h2">Font relative units with 20px font</div>
</body>

chromium/third_party/blink/web_tests/external/wpt/css/css-highlight-api/painting/custom-highlight-font-metrics-001-ref.html