Try it Editor: html_optgroup

Edit This Code :



<!DOCTYPE html>
<html>
<body>

<select>
  <optgroup label="Swedish Cars">
    <option value="volvo">Volvo</option>
    <option value="saab">Saab</option>
  </optgroup>
  <optgroup label="German Cars" disabled>
    <option value="mercedes">Mercedes</option>
    <option value="audi">Audi</option>
  </optgroup>
</select>

</body>
</html>

Result :

html_optgroup_disabled