<button popovertarget="menu-demo-popover">Menu</button>
<div popover id="menu-demo-popover" class="menu">
<ul class="menu-demo">
<li><a href="#">Settings</a></li>
<li><a href="#">My Profile</a></li>
<li><a href="#">Help</a></li>
<li><a href="#">Logout</a></li>
</ul>
</div>