HTML > sublistas

by academiax

HTML

ANIMALES
<ol>
  <li>Aves</li>
  <li>Reptiles
    <ol>
      <li>Anfibios
        <ol>
          <li>Ranas</li>
        </ol>
      </li>
      <li>Vertebrados</li>
    </ol>
  </li>
  <li>MamĂ­feros</li>
</ol>

CSS

ol {
  counter-reset: item;
}

li {
  display: block;
}

li::before {
  content: counters(item, ".") " ";
  counter-increment: item;
}