chromium/third_party/blink/web_tests/external/wpt/css/css-lists/li-insert-child.html

<!DOCTYPE HTML>
<!--
     Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/
-->
<html class="reftest-wait"><head>
  <meta charset="utf-8">
  <title>Test: Insert text node as first child in LI</title>
  <link rel="author" title="Mats Palmgren" href="mailto:[email protected]">
  <link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1567773">
  <link rel="match" href="li-insert-child-ref.html">
  <style>
    ul.inside { list-style-position: inside; }
    .before::before { content: "before"; }
    .after::after { content: "after"; }
  </style>
</head>
<body>

<ul class="inside">
  <li>B</li>
</ul>

<ul class="inside">
  <li class="before">B</li>
</ul>

<ul class="inside">
  <li class="after">B</li>
</ul>

<ul class="inside">
  <li class="before after">B</li>
</ul>

<ul>
  <li>B</li>
</ul>

<ul>
  <li class="before">B</li>
</ul>

<ul>
  <li class="after">B</li>
</ul>

<ul>
  <li class="before after">B</li>
</ul>

<script>
document.body.offsetHeight;
let items = Array.prototype.slice.call(document.querySelectorAll('li'));
items.map(li => li.insertBefore(document.createTextNode('A'), li.firstChild));
document.documentElement.className = '';
</script>

</body>
</html>