css/css-content/parsing/content-counter-valid.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Content Test: counter() in alt text parsing</title>
<link rel="help" href="https://drafts.csswg.org/css-content-3/#content-property">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/parsing-testcommon.js"></script>
<div id="target"></div>
<script>
  test_valid_value("content", `"" / counter(cnt)`);
  test_valid_value("content", `"regular text" / "alt text 1" counter(cnt) "alt text 2"`);
  test_valid_value("content", `"regular text" / counter(cnt) "alt text"`);
</script>