CodePen

HTML

            
              <ul>
  <li>Something</li>
  <li>Dropdown
    <ul>
      <li>Something Else</li>
      <li>Another thing</li>
      <li>Things everywhere</li>
    </ul>
  </li>
</ul>
            
          
!

↑ Insert the most common viewport meta tag

CSS

            
              ul {
  list-style: none;
}

ul ul li:before {
  content: "-";
}
            
          
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JS

            
              
            
          
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