Copiar HTML
<label for="baseline-select">Elige una tecnología</label>
<select id="baseline-select" name="baseline-choice">
<option value="option-1" selected>Selecciona una opción</option>
<hr />
<optgroup label="Frontend">
<option value="html">HTML</option>
<option value="css">CSS</option>
<option value="javascript">JavaScript</option>
</optgroup>
<optgroup label="Plataforma web">
<option value="web-components">Web Components</option>
<option value="forms">Forms</option>
</optgroup>
</select>