testing/web-platform/tests/css/css-pseudo/highlight-custom-properties-dynamic-001-ref.html


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<!DOCTYPE html>
<meta charset="UTF-8">
<title>CSS Pseudo Test: Dynamic Custom Properties for Highlights</title>
<link rel="author" title="Stephen Chenney" href="mailto:schenney@igalia.com">
<head>
  <style>
    ::selection {
      background-color: green;
    }
  </style>
</head>
<body>Green background when selected</body>
<script>
  window.getSelection().selectAllChildren(document.body);
</script>
</html>