buttons.html

<!-- Accesible button as a div -->
<div tabindex="0"
   role="button"
   id="action">
  Buy stuff
</div>

<!-- Accesible toggle button as an <a>-element -->
<a tabindex="0"
 role="button"
 id="toggle"
 aria-pressed="false">

      Mute 

  <svg aria-hidden="true">
    <use xlink:href="images/mute.svg#icon-sound">
  </svg>
</a>
  
<!-- Native and accesible button -->
<button type="button" aria-pressed="false" onclick="handleBtnClick(event)">
  Call to action
</button>