<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Reference: ::marker pseudo elements styled with 'content' property</title>
<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com">
<style>
img {
  display: list-item;
  list-style-type: "[marker]";
}
img.inside {
  list-style-position: inside;
}
</style>
<ol>
  <img src="about:invalid" alt="alt" class="inside" />
  <img src="about:invalid" alt="alt" />
  <li value="3">item</li>
</ol>