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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>