css/css-text/text-transform/text-transform-upperlower-105.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Text Test: text-transform uppercase German sharp S and selection</title>
<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">
<link rel="help" href="https://drafts.csswg.org/css-text/#propdef-text-transform">
<link rel="match" href="reference/text-transform-upperlower-105-ref.html">
<meta name="assert" content="text-transform: uppercase will uppercase the German sharp S as SS, and the whole 2 characters width is selectable.">
<style>
#target {
  text-transform: uppercase;
  color: white;
  background: red;
}
#target::selection {
  background: green;
}
</style>

<p>The test passes if you see no red below (when you select the text below you can select the whole "SS" text).</p>

<span id="target" lang="de">&#x00DF;</span>

<script>
  window.getSelection().setBaseAndExtent(target, 0, target, 1);
</script>